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The die-casting mold is a method of casting liquid die forging, a process performed on a dedicated die-casting die forging machine. The basic process is: the metal liquid is first filled into the cavity of the mold by low speed or high speed casting, and the mold has a movable cavity surface, which is pressed and forged with the cooling process of the molten metal, thereby eliminating the shrinkage of the blank. The loose defect also causes the internal structure of the blank to reach the forged broken grain. The overall mechanical properties of the blank are significantly improved. The alloys used in die castings are mainly non-ferrous alloys, and ferrous metals (steel, iron, etc.) are less used due to problems such as mold materials. Among the non-ferrous alloy die-casting parts, aluminum alloy is widely used, and zinc alloy is second. The following is a brief introduction to the case of die-casting non-ferrous metals.
Classification of die-casting non-ferrous alloys, shrinkage, shrinkage, shrinkage, shrinkage, free shrinkage, lead alloy-----0.2-0.3%, 0.3-0.4%, 0.4-0.5%, low-melting alloy, tin alloy, zinc alloy--------0.3-0.4% 0.4 -0.6% 0.6-0.8% Aluminium-silicon system--0.3-0.5% 0.5-0.7% 0.7-0.9% Die-casting non-ferrous alloy aluminum alloy aluminum-copper-magnesium---0.5-0.7% 0.7-0.9% 0.9-1.1% High melting point alloy aluminum-zinc-based magnesium alloy----------0.5-0.7% 0.7-0.9% 0.9-1.1% Copper alloy various casting alloys recommended casting temperature alloy type castings average wall thickness ≤ 3mm casting average Wall thickness > 3mm The structure is simple and complex. Aluminum alloy silicon silicon 610-650°C 640-680°C 600-620°C 610-650°C, aluminum copper 630-660°C 660-700°C 600-640°C 630-660°C, aluminum-magnesium 640-680°C 660 -700°C 640-670°C 650-690°C, aluminum-zinc series 590-620°C 620-660°C 580-620°C 600-650°C, zinc alloy 420-440°C 430-450°C 400-420°C 420-440°C , magnesium alloy 640-680 ° C 660-700 ° C 640-670 ° C 650-690 ° C,
Copper alloy Ordinary brass 910-930°C 940-980°C 900-930°C 900-950°C, silicon brass 900-920°C 930-970°C 910-940°C 910-940°C.
Introducing the material In order to let you know more about the die-casting mold, I will briefly introduce his design process below.
1. According to the materials used in the product, the shape and precision of the product, the product is analyzed and the process is set. 2. Determine the position of the product placed in the mold cavity, and analyze and design the parting surface, drainage system and gating system. 3. Design the core assembly method and fixing method for each activity. 4. Design of core distance and force. 5, the design of the ejection mechanism. 6. Determine the die casting machine and design the mold base and cooling system. 7. Check the relevant dimensions of the mold and die casting machine, and draw the mold and the process diagram of each part. 8, the design is complete.
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