{"id":4394,"date":"2026-04-21T12:19:50","date_gmt":"2026-04-21T12:19:50","guid":{"rendered":"https:\/\/chinametalfoundry.com\/?p=4394"},"modified":"2026-08-13T10:58:36","modified_gmt":"2026-08-13T10:58:36","slug":"odlevani-medi-eliminace-studenych-spoju","status":"publish","type":"post","link":"https:\/\/chinametalfoundry.com\/cs\/blog\/copper-casting-eliminate-cold-shuts\/","title":{"rendered":"Lit\u00ed m\u011bdi: Jak odstranit studen\u00e9 spoje p\u0159i v\u00fdrob\u011b odlitk\u016f"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"4394\" class=\"elementor elementor-4394\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6f4a8a6c elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6f4a8a6c\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-2851f619\" data-id=\"2851f619\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-24f664c9 elementor-widget elementor-widget-text-editor\" data-id=\"24f664c9\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><em>P\u0159i velkoobjemov\u00e9 v\u00fdrob\u011b odl\u00e9v\u00e1n\u00ed m\u011bdi mohou studen\u00e9 sp\u00e1je v\u00e9st k v\u00fdznamn\u00fdm ztr\u00e1t\u00e1m. Jedin\u00e1 chyba odlitku m\u016f\u017ee v\u00e9st ke zpomalen\u00ed v\u00fdroby a hromad\u011bn\u00ed zmetk\u016f. Pro kupuj\u00edc\u00ed m\u011bd\u011bn\u00fdch odlitk\u016f, kte\u0159\u00ed po\u017eaduj\u00ed p\u0159\u00edsn\u00e9 tolerance and krat\u0161\u00ed dodac\u00ed lh\u016fty, to m\u016f\u017ee podstatn\u011b zv\u00fd\u0161it v\u00fdrobn\u00ed n\u00e1klady. M\u011b\u010f v\u0161ak rychle chladne, co\u017e br\u00e1n\u00ed toku a zt\u011b\u017euje \u0159\u00e1dn\u00e9 taven\u00ed roztaven\u00e9ho kovu. Bez p\u0159esn\u00e9 kontroly teploty a na\u010dasov\u00e1n\u00ed se zisk zformy vytrat\u00ed.<\/em><\/p><p><em>Americk\u00e1 geologick\u00e1 slu\u017eba (USGS) uv\u00e1d\u00ed, \u017ee popt\u00e1vka po m\u011bdi v USA dosahuje ro\u010dn\u011b p\u0159es 1,8 milionu tun \u2013 co\u017e je d\u016fkazem, \u017ee tento kov udr\u017euje pr\u016fmysl v chodu. Jak poznamen\u00e1v\u00e1 ASM International: \u201cTuhnut\u00ed <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/a356-aluminum-investment-casting-quality-control-finish\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"2838\">kontrola je kl\u00ed\u010dov\u00e1 pro obsazov\u00e1n\u00ed<\/a> integrita.\u201d<\/em><\/p><p><em>Tento \u010dl\u00e1nek poskytuje hloubkovou anal\u00fdzu p\u0159\u00ed\u010din studen\u00fdch spoj\u016f p\u0159i odl\u00e9v\u00e1n\u00ed m\u011bdi, kter\u00e1 pokr\u00fdv\u00e1 technick\u00e9 v\u00fdzvy spojen\u00e9 s p\u00edskov\u00fdm lit\u00edm, lit\u00edm do permanentn\u00edch forem, odst\u0159ediv\u00fdm lit\u00edm a <a class=\"wpil_keyword_link\" href=\"https:\/\/chinametalfoundry.com\/cs\/presne-liti\/\" target=\"_blank\"  rel=\"noopener\" title=\"p\u0159esn\u00e9 lit\u00ed\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1273\">p\u0159esn\u00e9 lit\u00ed<\/a>. Popisuje tak\u00e9 praktick\u00e9 strategie pro regulaci teploty, vlastnosti slitin a optimalizaci simulac\u00ed, kter\u00e9 sl\u00e9v\u00e1rn\u00e1m pom\u00e1haj\u00ed zm\u00edrnit riziko vzniku studen\u00fdch spoj\u016f.<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-7db6b0de elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7db6b0de\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-75a4113b\" data-id=\"75a4113b\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2c79f6ba elementor-widget elementor-widget-elementskit-heading\" data-id=\"2c79f6ba\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"elementskit-heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"ekit-wid-con\" ><div class=\"ekit-heading elementskit-section-title-wraper text_left   ekit_heading_tablet-   ekit_heading_mobile-\"><h2 class=\"ekit-heading--title elementskit-section-title  ekit-heading__title-has-border start\">\u010cast\u00e9 p\u0159\u00ed\u010diny studen\u00fdch spoj\u016f p\u0159i odl\u00e9v\u00e1n\u00ed m\u011bdi<\/h2>\t\t\t\t<div class='ekit-heading__description'>\n\t\t\t\t\t<p>Studen\u00e9 spojen\u00ed u odlitk\u016f z m\u011bdi je zp\u016fsobeno jemn\u00fdmi zm\u011bnami tepla, rychlosti toku nebo chov\u00e1n\u00ed slitiny b\u011bhem samotn\u00e9ho procesu lit\u00ed. A\u0165 u\u017e se jedn\u00e1 o p\u00edskov\u00e9 lit\u00ed nebo odst\u0159ediv\u00e9 lit\u00ed, ka\u017ed\u00fd proces lit\u00ed m\u00e1 sv\u00e9 slabiny. N\u00e1sleduj\u00edc\u00ed \u010d\u00e1st bude analyzovat p\u0159\u00ed\u010diny vad, jako je studen\u00e9 spojen\u00ed u odlitk\u016f z m\u011bdi, a zp\u016fsob, jak se t\u011bmto probl\u00e9m\u016fm vyhnout prost\u0159ednictv\u00edm inteligentn\u00ed v\u00fdroby odlitk\u016f.<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2eb7625 elementor-widget elementor-widget-elementskit-heading\" data-id=\"2eb7625\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"elementskit-heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"ekit-wid-con\" ><div class=\"ekit-heading elementskit-section-title-wraper text_left   ekit_heading_tablet-   ekit_heading_mobile-\"><h3 class=\"ekit-heading--title elementskit-section-title\">V\u00fdzvy p\u0159i lit\u00ed slitin m\u011bdi do p\u00edskov\u00fdch forem<\/h3><div class=\"ekit_heading_separetor_wraper ekit_heading_elementskit-border-divider ekit-dotted\"><div class=\"elementskit-border-divider ekit-dotted\"><\/div><\/div><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-30392181 elementor-widget elementor-widget-text-editor\" data-id=\"30392181\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>V <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/best-die-casting-for-cu-brass\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"2932\">lit\u00ed m\u011bdi do p\u00edsku<\/a>, vady typu studen\u00fd spoj (cold shut) vznikaj\u00ed \u010dasto p\u0159i odl\u00e9v\u00e1n\u00ed vysoce tepeln\u011b vodiv\u00fdch m\u011bd\u011bn\u00fdch slitin. Je tomu tak proto, \u017ee <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/sand-casting-prototypes\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"4632\">p\u00edskov\u00e1 forma rychle<\/a> odv\u00e1d\u00ed teplo od roztaven\u00e9ho kovu, co\u017e zp\u016fsob\u00ed p\u0159ed\u010dasn\u00e9 ztuhnut\u00ed \u010dela toku a zabr\u00e1n\u00ed \u0159\u00e1dn\u00e9mu sm\u00edsen\u00ed v m\u00edst\u011b, kde se proudy kovu sb\u00edhaj\u00ed.<\/p><p>V re\u00e1ln\u00e9 v\u00fdrob\u011b jsou hlavn\u00edmi faktory vedouc\u00edmi k nedolit\u00ed <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/aluminium-casting-9-defects-solutions\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"3028\">vady v m\u011bd\u011bn\u00fdch odlitc\u00edch<\/a> zahrnout<\/p><ul><li>Vysok\u00e1 tepeln\u00e1 vodivost mosazi a bronzu zkracuje dobu tuhnut\u00ed, \u010d\u00edm\u017e se zkracuje doba taven\u00ed v bod\u011b sb\u011bhu.<\/li><li>Pokud je n\u00e1litek navr\u017een p\u0159\u00edli\u0161 \u00fazk\u00fd, tlak kovu kles\u00e1, co\u017e \u010din\u00ed tenkost\u011bnn\u00e9 oblasti n\u00e1chyln\u011bj\u0161\u00edmi k p\u0159ed\u010dasn\u00e9mu tuhnut\u00ed.<\/li><li>Nedostate\u010dn\u00fd p\u0159edeh\u0159ev formy, nadm\u011brn\u00e1 vlhkost v p\u00edsku a \u0161patn\u00e9 odv\u011btr\u00e1v\u00e1n\u00ed d\u00e1le zhor\u0161uj\u00ed n\u00e1hl\u00e9 poklesy teploty.<\/li><\/ul><p>Vy\u0161\u0161\u00ed tepeln\u00e1 vodivost znamen\u00e1 u\u017e\u0161\u00ed \u010dasov\u00e9 okno. V jej\u00edm <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/how-aluminum-die-casting-mold-design-influences-production-efficiency\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"1620\">castingov\u00e1 produkce<\/a>, Spole\u010dnost Supro MFG optimalizovala nal\u00e9vac\u00ed syst\u00e9m a tepelnou simulaci pro odlitky z m\u011bkk\u00fdch slitin, aby zajistila minimalizaci rizika studen\u00fdch spoj\u016f p\u0159ed vstupem kovu do dutiny formy.<\/p><p>N\u00e1sleduje typick\u00e9 tepeln\u00e9 porovn\u00e1n\u00ed m\u011bd\u011bn\u00fdch odlitk\u016f:<\/p><table><tbody><tr><td width=\"142\"><p><strong><b>Typ slitiny<\/b><\/strong><\/p><\/td><td width=\"142\"><p><strong><b>Teplota lit\u00ed (\u00b0C)<\/b><\/strong><\/p><\/td><td width=\"142\"><p><strong><b>Rozsah tuhnut\u00ed (\u00b0C)<\/b><\/strong><\/p><\/td><td width=\"142\"><p><strong><b>Tepeln\u00e1 vodivost (W\/m\u00b7K)<\/b><\/strong><\/p><\/td><\/tr><tr><td width=\"142\"><p><strong><b>Mosaz C360<\/b><\/strong><\/p><\/td><td width=\"142\"><p>930\u2013970<\/p><\/td><td width=\"142\"><p>890\u2013905<\/p><\/td><td width=\"142\"><p>120<\/p><\/td><\/tr><tr><td width=\"142\"><p><strong><b>C932 Bronze<\/b><\/strong><\/p><\/td><td width=\"142\"><p>1020\u20131050<\/p><\/td><td width=\"142\"><p>950\u2013990<\/p><\/td><td width=\"142\"><p>60<\/p><\/td><\/tr><tr><td width=\"142\"><p><strong><b>Pure Copper<\/b><\/strong><\/p><\/td><td width=\"142\"><p>1085\u20131150<\/p><\/td><td width=\"142\"><p>~1085<\/p><\/td><td width=\"142\"><p>390<\/p><\/td><\/tr><tr><td width=\"142\"><p><strong><b>Al Bronze<\/b><\/strong><\/p><\/td><td width=\"142\"><p>1040\u20131080<\/p><\/td><td width=\"142\"><p>1020\u20131040<\/p><\/td><td width=\"142\"><p>35<\/p><\/td><\/tr><tr><td width=\"142\"><p><strong><b>Sn Bronze<\/b><\/strong><\/p><\/td><td width=\"142\"><p>1000\u20131030<\/p><\/td><td width=\"142\"><p>900\u2013950<\/p><\/td><td width=\"142\"><p>50<\/p><\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-76c226b elementor-widget elementor-widget-elementskit-heading\" data-id=\"76c226b\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"elementskit-heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"ekit-wid-con\" ><div class=\"ekit-heading elementskit-section-title-wraper text_left   ekit_heading_tablet-   ekit_heading_mobile-\"><h3 class=\"ekit-heading--title elementskit-section-title\">How low ductility in tellurium copper triggers splits<\/h3><div class=\"ekit_heading_separetor_wraper ekit_heading_elementskit-border-divider ekit-dotted\"><div class=\"elementskit-border-divider ekit-dotted\"><\/div><\/div><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a98102c elementor-widget elementor-widget-text-editor\" data-id=\"a98102c\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Although tellurium-copper alloys exhibit excellent machinability, their low ductility during solidification may lead to cold shut defects. The root cause lies in the fact that when this <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/a356-aluminum-investment-casting\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"3585\">alloy is used in the copper casting<\/a> process, the material\u2019s properties within the high-temperature short-range region reduce its tensile strength and limit plastic deformation. When two metal streams converge, fusion is incomplete, and the presence of a surface oxide film leads to micro-separation at the joint. Ultimately, under the action of contraction stress, the micro-gap continues to widen, resulting in significant cracks in the copper <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/sand-casting-surface-finish\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"4195\">odlitkov\u00e9 d\u00edly<\/a>.<\/p><p>In copper <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/sand-casting-porosity-and-shrinkage\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"4998\">casting shops that prioritize speed over control<\/a>, thin-walled electronic components are particularly susceptible to damage due to the mechanical behavior of this alloy. Complex geometries combined with rapid cooling can result in insufficient strength at the fusion line. Copper <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/3d-printed-metal-casting\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"1895\">casting involves the fusion of the metal<\/a> front under shrinkage stress. To produce higher-quality copper <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/perfecting-sand-casting-parting-lines\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"4542\">odlitkov\u00e9 d\u00edly<\/a>, it is necessary to control overheating, balance gate flow rates, and ensure the purity of the melt composition.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e22c519 elementor-widget elementor-widget-elementskit-heading\" data-id=\"e22c519\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"elementskit-heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"ekit-wid-con\" ><div class=\"ekit-heading elementskit-section-title-wraper text_left   ekit_heading_tablet-   ekit_heading_mobile-\"><h3 class=\"ekit-heading--title elementskit-section-title\">Gating system design flaws in permanent mold casting<\/h3><div class=\"ekit_heading_separetor_wraper ekit_heading_elementskit-border-divider ekit-dotted\"><div class=\"elementskit-border-divider ekit-dotted\"><\/div><\/div><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b69af27 elementor-widget elementor-widget-text-editor\" data-id=\"b69af27\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>In permanent <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/investment-casting-mold\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"2696\">mold casting<\/a>, heat dissipates from metal molds even faster than from sand molds. When cold shuts occur in copper castings, they are typically caused by defects in the <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/sand-casting-tools-and-gating-system\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"5686\">gating system<\/a> design. Excessively long horizontal runners and sharp bends cause turbulence in the molten metal, leading to a sudden drop in temperature before the cavity is filled; uneven <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/sand-casting-wall-thickness-guidelines\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"5235\">wall thickness<\/a> results in varying cooling rates, and the absence of overflow channels causes gas bubbles to become trapped. If the flow velocity in the copper casting process is too low or the sprue deviates, the surface oxide film is prone to folding, while excessively high flow velocity exacerbates turbulence.<\/p><p>In copper casting, laminar flow is the golden rule, while turbulent flow can compromise fusion. Supro MFG uses simulation tools to optimize permanent <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/aluminum-die-casting-mold-design-5-parameters-that-cut-project-risks-defect-rates-by-30\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"1741\">mold pouring systems for casting projects<\/a>, particularly in fields such as electrical connectors and heat transfer components where the clarity of the fusion line is critical.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e08b09c elementor-widget elementor-widget-elementskit-heading\" data-id=\"e08b09c\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"elementskit-heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"ekit-wid-con\" ><div class=\"ekit-heading elementskit-section-title-wraper text_left   ekit_heading_tablet-   ekit_heading_mobile-\"><h3 class=\"ekit-heading--title elementskit-section-title\">Inconsistent mold temperature in centrifugal casting<\/h3><div class=\"ekit_heading_separetor_wraper ekit_heading_elementskit-border-divider ekit-dotted\"><div class=\"elementskit-border-divider ekit-dotted\"><\/div><\/div><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7e25ae1 elementor-widget elementor-widget-text-editor\" data-id=\"7e25ae1\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Centrifugal casting incorporates a rotational step into the process; while this can increase the density of copper castings, it also rapidly exposes <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/aluminum-investment-casting-heat-treatment-optimizing-t6-properties-for-a356-and-alsi10mg\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"2090\">tepeln\u00e9 zpracov\u00e1n\u00ed<\/a> defects. When the mold temperature is unstable, subsurface cold shuts may form in the castings. This occurs because uneven preheating creates localized cold spots, causing the thin outer layer to solidify prematurely during rotation; subsequently, the molten metal coming into contact with the semi-solid layer fails to bond, resulting in interlayer separation.<\/p><p>Key control points for centrifugal copper casting include: maintaining preheating uniformity within \u00b115\u00b0C, ensuring stable rotational speed, maintaining a consistent metal feed rate, and controlling heat distribution. At Supro MFG, centrifugal copper casting projects utilize controlled preheating mapping technology to ensure uniform fusion throughout the wall thickness\u2014a factor that is particularly critical for bushings and bearing sleeves, where structural integrity is paramount.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-38ddc5c5 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"38ddc5c5\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t\t<div class=\"elementor-background-overlay\"><\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-77f69ce\" data-id=\"77f69ce\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-57758a21 elementor-widget elementor-widget-elementskit-heading\" data-id=\"57758a21\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"elementskit-heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"ekit-wid-con\" ><div class=\"ekit-heading elementskit-section-title-wraper text_left   ekit_heading_tablet-   ekit_heading_mobile-\"><p class=\"ekit-heading--title elementskit-section-title\">Hled\u00e1te spolehlivou \u010d\u00ednskou kovodl\u00e9varnu?<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4721ac64 elementor-widget elementor-widget-text-editor\" data-id=\"4721ac64\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li>M\u016f\u017eeme v\u00e1m pomoci optimalizovat design produkt\u016f a u\u0161et\u0159it n\u00e1klady.<\/li><li>M\u016f\u017eeme v\u00e1m pomoci s vysokou <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/5-factors-affect-the-investment-casting\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"3432\">vysoce objemov\u00e9 kvalitn\u00ed odl\u00e9v\u00e1n\u00ed<\/a> \u010dasti.<\/li><li>Dok\u00e1\u017eeme dodat v\u010das a z\u00edskat dal\u0161\u00ed p\u0159\u00edle\u017eitosti na prodejn\u00edm trhu.<\/li><li>Z\u00edsk\u00e1te v\u00fdhodu d\u00edky Supro MFG <a class=\"wpil_keyword_link\" href=\"https:\/\/chinametalfoundry.com\/cs\/\" target=\"_blank\"  rel=\"noopener\" title=\"kovolitectv\u00ed\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1272\">kovolitectv\u00ed<\/a> slu\u017eba.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5c5018e1 elementor-align-left elementor-widget elementor-widget-global elementor-global-1143 elementor-widget-button\" data-id=\"5c5018e1\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm elementor-animation-grow\" href=\"https:\/\/chinametalfoundry.com\/cs\/kontakt\/\" target=\"_blank\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Vy\u017e\u00e1dat si cenovou nab\u00eddku p\u0159\u00edmo od v\u00fdrobce <\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-1d16d649 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"1d16d649\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-6e07c34a\" data-id=\"6e07c34a\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-257e4437 elementor-widget elementor-widget-elementskit-heading\" data-id=\"257e4437\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"elementskit-heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"ekit-wid-con\" ><div class=\"ekit-heading elementskit-section-title-wraper text_left   ekit_heading_tablet-   ekit_heading_mobile-\"><h2 class=\"ekit-heading--title elementskit-section-title  ekit-heading__title-has-border start\">5 Hidden Causes of Cold Shuts in Copper Casting<\/h2>\t\t\t\t<div class='ekit-heading__description'>\n\t\t\t\t\t<p>The risk of cold shuts in the copper casting process can be attributed to five underlying causes. Even minor deviations in control parameters can accumulate rapidly; once the flow of molten metal, mold temperature, and alloy composition deviate from equilibrium, cold shuts can form unnoticed, disrupting the solidification and shaping of the casting.<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-66d47f64 elementor-widget elementor-widget-elementskit-heading\" data-id=\"66d47f64\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"elementskit-heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"ekit-wid-con\" ><div class=\"ekit-heading elementskit-section-title-wraper text_left   ekit_heading_tablet-   ekit_heading_mobile-\"><h3 class=\"ekit-heading--title elementskit-section-title\">Improper wall thickness in gravity casting<\/h3><div class=\"ekit_heading_separetor_wraper ekit_heading_elementskit-border-divider ekit-dotted\"><div class=\"elementskit-border-divider ekit-dotted\"><\/div><\/div><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6702e19a elementor-widget elementor-widget-text-editor\" data-id=\"6702e19a\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>In gravity casting, uneven wall thickness design can interfere with the solidification and flow of the <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/aluminum-investment-casting-a356-t6-designing-for-critical-structural-loads\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"1989\">copper<\/a> casting. When the <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/die-casting-mold-efficiency\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"3315\">n\u00e1vrh formy<\/a> is unbalanced, thin-walled areas cool too quickly, while thick-walled areas retain heat for longer. During pouring, the molten metal front splits and forms an oxide layer, ultimately leading to reduced fusion strength. Once the copper casting has cooled, defects and hidden bonding gaps become clearly visible.<\/p><p>For copper castings with sharp transition surfaces, even the slightest variation in thickness can alter the thermal gradient. In copper <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/sand-casting-defects-elimination\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"4075\">slitkov\u00e9 odlitky<\/a>, this mismatch hinders proper fusion and directly leads to cold shuts.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2eb5ba5 elementor-widget elementor-widget-elementskit-heading\" data-id=\"2eb5ba5\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"elementskit-heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"ekit-wid-con\" ><div class=\"ekit-heading elementskit-section-title-wraper text_left   ekit_heading_tablet-   ekit_heading_mobile-\"><h3 class=\"ekit-heading--title elementskit-section-title\">Slow fill speeds during lost wax casting<\/h3><div class=\"ekit_heading_separetor_wraper ekit_heading_elementskit-border-divider ekit-dotted\"><div class=\"elementskit-border-divider ekit-dotted\"><\/div><\/div><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-34daada elementor-widget elementor-widget-text-editor\" data-id=\"34daada\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>In lost-wax casting, if the filling rate is too slow, the molten metal will lose heat before the mold cavity is filled. Major signs of failure in copper <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/sand-casting-design-guide\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"3978\">casting include poor spout design<\/a>, excessively narrow runners, and excessive back pressure.<\/p><p>When the molten flow stagnates, the leading edges of the two streams meet in a cold area, and the resulting oxide layer prevents proper fusion. In the <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/stainless-steel-investment-casting-2\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"3078\">production of investment-style copper castings<\/a>, adjusting the casting process speed allows for maintaining good fluidity while rapidly reducing cold shuts.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8e6e90d elementor-widget elementor-widget-elementskit-heading\" data-id=\"8e6e90d\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"elementskit-heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"ekit-wid-con\" ><div class=\"ekit-heading elementskit-section-title-wraper text_left   ekit_heading_tablet-   ekit_heading_mobile-\"><h3 class=\"ekit-heading--title elementskit-section-title\">Low thermal conductivity in phosphor bronze pours<\/h3><div class=\"ekit_heading_separetor_wraper ekit_heading_elementskit-border-divider ekit-dotted\"><div class=\"elementskit-border-divider ekit-dotted\"><\/div><\/div><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7795de4 elementor-widget elementor-widget-text-editor\" data-id=\"7795de4\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Phosphor bronze has relatively low thermal conductivity, which causes <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/sand-casting-heat-treatment\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"4868\">heat to diffuse slowly during the casting<\/a> process and makes it prone to the formation of localized hot spots. Uneven temperature distribution during pouring can lead to uneven solidification during cooling. Therefore, co-casting copper alloys and bronze requires stricter thermal control. Otherwise, isolated cooling zones may form within the copper casting, preventing proper fusion at the leading edge of the molten pool.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-516b426 elementor-widget elementor-widget-elementskit-heading\" data-id=\"516b426\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"elementskit-heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"ekit-wid-con\" ><div class=\"ekit-heading elementskit-section-title-wraper text_left   ekit_heading_tablet-   ekit_heading_mobile-\"><h3 class=\"ekit-heading--title elementskit-section-title\">Inadequate mold preheating and heat treatment gaps<\/h3><div class=\"ekit_heading_separetor_wraper ekit_heading_elementskit-border-divider ekit-dotted\"><div class=\"elementskit-border-divider ekit-dotted\"><\/div><\/div><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7f673e7 elementor-widget elementor-widget-text-editor\" data-id=\"7f673e7\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Cold shuts can typically be traced to improper <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/mastering-sand-casting-mold-materials\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"5485\">mold preheating during copper casting<\/a>. If the initial mold temperature is too low, the surface metal will cool rapidly. Combined with an uneven post-casting heat treatment cycle, this will cause a rapid decline in the quality of the copper casting. To avoid this problem, the solutions are:<\/p><ul><li>Raise the mold temperature to a level consistent with the alloy\u2019s melting point range.<\/li><li>Ensure the temperature is stable before pouring the molten copper.<\/li><li>Maintain consistent thermal management throughout the pouring process.<\/li><li>Perform consistent heat treatment after pouring.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-330fb56 elementor-widget elementor-widget-elementskit-heading\" data-id=\"330fb56\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"elementskit-heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"ekit-wid-con\" ><div class=\"ekit-heading elementskit-section-title-wraper text_left   ekit_heading_tablet-   ekit_heading_mobile-\"><h3 class=\"ekit-heading--title elementskit-section-title\">Overlooking ASTM specifications for material certification<\/h3><div class=\"ekit_heading_separetor_wraper ekit_heading_elementskit-border-divider ekit-dotted\"><div class=\"elementskit-border-divider ekit-dotted\"><\/div><\/div><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b4321d5 elementor-widget elementor-widget-text-editor\" data-id=\"b4321d5\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/aluminum-investment-casting-astm-standards-certifying-a356-t6-properties\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"2303\">ASTM standards are often overlooked in the copper casting<\/a> process, specifically regarding unverified material certifications, lax quality control, and inconsistent material properties. Fluctuations in chemical composition can affect the copper\u2019s fluidity, ductility, and corrosion resistance. This alters solidification behavior and increases the risk of cold shuts in copper castings.<\/p><p>Partnering with a meticulous copper casting foundry like Supro MFG helps ensure the use of certified alloys, controlled casting parameters, and more rigorous inspection processes. For teams that prioritize the reliability of metal castings, Supro MFG ensures the predictability of copper castings\u2014which is key to preventing cold shuts.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-301f437d elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"301f437d\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-652eadf1\" data-id=\"652eadf1\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-39cf5f5 elementor-widget elementor-widget-image\" data-id=\"39cf5f5\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"600\" height=\"400\" src=\"https:\/\/chinametalfoundry.com\/wp-content\/uploads\/2026\/04\/Reverse-the-Chill-Copper-Casting-Pouring-Temperature-Secrets.webp\" class=\"attachment-large size-large wp-image-4398\" alt=\"Reverse the Chill Copper Casting\u00a0Pouring Temperature Secrets\" srcset=\"https:\/\/chinametalfoundry.com\/wp-content\/uploads\/2026\/04\/Reverse-the-Chill-Copper-Casting-Pouring-Temperature-Secrets.webp 600w, https:\/\/chinametalfoundry.com\/wp-content\/uploads\/2026\/04\/Reverse-the-Chill-Copper-Casting-Pouring-Temperature-Secrets-300x200.webp 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1db5e586 elementor-widget elementor-widget-elementskit-heading\" data-id=\"1db5e586\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"elementskit-heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"ekit-wid-con\" ><div class=\"ekit-heading elementskit-section-title-wraper text_left   ekit_heading_tablet-   ekit_heading_mobile-\"><h2 class=\"ekit-heading--title elementskit-section-title  ekit-heading__title-has-border start\">Reverse the Chill: Copper Casting\u00a0Pouring Temperature Secrets<\/h2>\t\t\t\t<div class='ekit-heading__description'>\n\t\t\t\t\t<p>Precise temperature control is essential for successful copper casting. From brass to bronze, once the molten metal begins to flow, each copper alloy reacts differently. In modern foundries, precise temperature control translates to fewer defects and tighter tolerances.<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-169050dc elementor-widget elementor-widget-elementskit-heading\" data-id=\"169050dc\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"elementskit-heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"ekit-wid-con\" ><div class=\"ekit-heading elementskit-section-title-wraper text_left   ekit_heading_tablet-   ekit_heading_mobile-\"><h3 class=\"ekit-heading--title elementskit-section-title\">Optimal melt ranges for brass and aluminum bronze<\/h3><div class=\"ekit_heading_separetor_wraper ekit_heading_elementskit-border-divider ekit-dotted\"><div class=\"elementskit-border-divider ekit-dotted\"><\/div><\/div><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-62e843c8 elementor-widget elementor-widget-text-editor\" data-id=\"62e843c8\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>In copper casting, the optimal melting temperature range ensures smooth melt flow without causing the loss of alloying elements. For brass and bronze, strict temperature control helps maintain the alloy\u2019s chemical composition and final strength. As a professional copper casting foundry in China, Supro MFG typically adjusts the following parameters based on the actual <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/optimizing-aluminum-die-casting-mold-material-selection-high-performance-low-cost-high-efficiency\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"2588\">mold geometry to consistently ensure the stable performance of cast<\/a> \u010dasti.<\/p><p>Different types of brass (Cu-Zn series) are affected by their composition in different ways. For 60\/40 brass (which has a higher zinc content), the liquidus temperature is lower. Lead-containing brass, on the other hand, has a narrower melting temperature range and offers better machinability. When controlling the temperature range, pouring at too high a temperature can lead to zinc oxidation, while pouring at too low a temperature can <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/costly-defects-in-aluminium-castings-an-analysis-of-crack-causes\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"2352\">cause gate defects in thin-walled copper castings<\/a>.<\/p><p>For aluminum bronze (Cu-Al series), the aluminum content (8\u201312%) causes the liquidus line to shift upward and makes the alloy susceptible to oxidation, so the furnace atmosphere must be carefully controlled. The following table compares common copper alloys:<\/p><table><tbody><tr><td width=\"142\"><p><strong><b>Typ slitiny<\/b><\/strong><\/p><\/td><td width=\"142\"><p><strong><b>Liquidus (\u00b0C)<\/b><\/strong><\/p><\/td><td width=\"142\"><p><strong><b>Recommended Pour Temp (\u00b0C)<\/b><\/strong><\/p><\/td><td width=\"142\"><p><strong><b>Oxidation Risk Level<\/b><\/strong><\/p><\/td><\/tr><tr><td width=\"142\"><p><strong><b>60\/40 Brass<\/b><\/strong><\/p><\/td><td width=\"142\"><p>900<\/p><\/td><td width=\"142\"><p>980\u20131020<\/p><\/td><td width=\"142\"><p>Medium<\/p><\/td><\/tr><tr><td width=\"142\"><p><strong><b>Leaded Brass<\/b><\/strong><\/p><\/td><td width=\"142\"><p>890<\/p><\/td><td width=\"142\"><p>950\u20131000<\/p><\/td><td width=\"142\"><p>Medium-High<\/p><\/td><\/tr><tr><td width=\"142\"><p><strong><b>9% Al Bronze<\/b><\/strong><\/p><\/td><td width=\"142\"><p>1030<\/p><\/td><td width=\"142\"><p>1080\u20131120<\/p><\/td><td width=\"142\"><p>Vysoko<\/p><\/td><\/tr><tr><td width=\"142\"><p><strong><b>11% Al Bronze<\/b><\/strong><\/p><\/td><td width=\"142\"><p>1045<\/p><\/td><td width=\"142\"><p>1100\u20131150<\/p><\/td><td width=\"142\"><p>Vysoko<\/p><\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9a6a2c3 elementor-widget elementor-widget-elementskit-heading\" data-id=\"9a6a2c3\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"elementskit-heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"ekit-wid-con\" ><div class=\"ekit-heading elementskit-section-title-wraper text_left   ekit_heading_tablet-   ekit_heading_mobile-\"><h3 class=\"ekit-heading--title elementskit-section-title\">Leveraging electrical conductivity data to dial in heat<\/h3><div class=\"ekit_heading_separetor_wraper ekit_heading_elementskit-border-divider ekit-dotted\"><div class=\"elementskit-border-divider ekit-dotted\"><\/div><\/div><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d536b35 elementor-widget elementor-widget-text-editor\" data-id=\"d536b35\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>During the copper casting process, changes in electrical conductivity reflect both composition and temperature. A change in conductivity indicates an anomaly within the molten metal: elevated conductivity may indicate high copper purity and low alloy content, while a sudden drop in conductivity may indicate overheating or contamination. Stable conductivity readings indicate that the pouring temperature is well controlled.<\/p><p>Many copper casting foundries follow these standard operating procedures:<\/p><p>1) Measure the baseline conductivity of the target alloy.<\/p><p>2) Monitor readings during the holding phase in the furnace.<\/p><p>3) Adjust the burner or induction input in small increments.<\/p><p>The 2025 International Copper Study Group noted that energy efficiency and thermal monitoring are \u201ckey cost drivers in non-ferrous foundry competitiveness.\u201d<\/p><p>\u201cAdvanced process monitoring, including thermal and conductivity tracking, is <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/accelerating-sand-casting-prototypes\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"4776\">accelerating yield improvement across global copper-based casting<\/a> operations.\u201d \u2014 International Copper Study Group, 2025 outlook<\/p><p>For foundries specializing in large-scale copper casting, electrical conductivity data plays a critical role. Supro MFG has successfully used this method to stabilize the production processes for both small- and large-batch copper <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/sand-casting-optimization\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"5111\">odlitkov\u00e9 d\u00edly<\/a>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-14f9842 elementor-widget elementor-widget-elementskit-heading\" data-id=\"14f9842\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"elementskit-heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"ekit-wid-con\" ><div class=\"ekit-heading elementskit-section-title-wraper text_left   ekit_heading_tablet-   ekit_heading_mobile-\"><h3 class=\"ekit-heading--title elementskit-section-title\">Using FEA analysis to predict solidification patterns<\/h3><div class=\"ekit_heading_separetor_wraper ekit_heading_elementskit-border-divider ekit-dotted\"><div class=\"elementskit-border-divider ekit-dotted\"><\/div><\/div><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c90f2e9 elementor-widget elementor-widget-text-editor\" data-id=\"c90f2e9\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Modern FEA tools integrate science into everyday casting operations. In copper casting, predicting solidification patterns helps reduce shrinkage and porosity before the metal enters the mold. By inputting the thermal conductivity and latent heat of the copper alloy, along with mold boundary conditions, solidification patterns can be predicted to identify hot spots and areas of high shrinkage. When <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/optimizing-sand-casting-parameters\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"5337\">optimizing the copper casting process<\/a>, modifying wall thicknesses and adjusting risers and gating channels can effectively reduce cold shuts and porosity.<\/p><p>For any copper casting production, digital simulation can shorten the trial-and-error phase. Supro MFG combines actual furnace data with FEA results to ensure that <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/engineered-sand-casting-parts\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"5584\">cast copper parts<\/a> are dimensionally accurate and structurally sound.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-2d043207 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"2d043207\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-470b3013\" data-id=\"470b3013\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2e5ececb elementor-widget elementor-widget-elementskit-heading\" data-id=\"2e5ececb\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"elementskit-heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"ekit-wid-con\" ><div class=\"ekit-heading elementskit-section-title-wraper text_left   ekit_heading_tablet-   ekit_heading_mobile-\"><h2 class=\"ekit-heading--title elementskit-section-title  ekit-heading__title-has-border start\">Contact Supro-Mfg<\/h2><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2747b662 elementor-widget elementor-widget-text-editor\" data-id=\"2747b662\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/aluminum-investment-casting-anodizing\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"3742\">Eliminating cold shuts in copper casting<\/a> requires systematic control of alloy properties, mold temperature, and gating system design. From <a href=\"https:\/\/chinametalfoundry.com\/cs\/blog\/sand-casting-core-design\/\" target=\"_blank\" rel=\"noopener\"  data-wpil-monitor-id=\"4346\">lit\u00ed do p\u00edsku<\/a> to centrifugal casting, optimizing parameters through electrical conductivity monitoring and FEA simulation can significantly improve casting density.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>In high-volume copper casting production, cold shuts can result in significant losses. A single casting error can lead to production [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":4397,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[12],"tags":[],"class_list":["post-4394","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technology"],"_links":{"self":[{"href":"https:\/\/chinametalfoundry.com\/cs\/wp-json\/wp\/v2\/posts\/4394","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/chinametalfoundry.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/chinametalfoundry.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/chinametalfoundry.com\/cs\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/chinametalfoundry.com\/cs\/wp-json\/wp\/v2\/comments?post=4394"}],"version-history":[{"count":38,"href":"https:\/\/chinametalfoundry.com\/cs\/wp-json\/wp\/v2\/posts\/4394\/revisions"}],"predecessor-version":[{"id":7419,"href":"https:\/\/chinametalfoundry.com\/cs\/wp-json\/wp\/v2\/posts\/4394\/revisions\/7419"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/chinametalfoundry.com\/cs\/wp-json\/wp\/v2\/media\/4397"}],"wp:attachment":[{"href":"https:\/\/chinametalfoundry.com\/cs\/wp-json\/wp\/v2\/media?parent=4394"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/chinametalfoundry.com\/cs\/wp-json\/wp\/v2\/categories?post=4394"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/chinametalfoundry.com\/cs\/wp-json\/wp\/v2\/tags?post=4394"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}