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Die casting is a universal process that produces engineering metal parts by melting metal under high pressure into reusable steel molds. And lead die casting is also one of the applications of die casting.
The traditional die-casting process is mainly composed of four steps, or it is called high-pressure die-casting. These four steps include mold preparation, filling, injection, and sand falling, which are also the basis for various improved die casting processes. During the preparation process, a lubricant needs to be sprayed into the mold cavity. In addition to helping to control the temperature of the mold, the lubricant can also help de-mold the casting. Then you can close the mold and inject the molten metal into the mold with high pressure. The pressure range is about 10 to 175 MPa. When the molten metal is filled, the pressure will be maintained until the casting solidifies. Then the pushrod will push out all the castings. Since there may be multiple cavities in a mold, multiple castings may be produced during each casting process. The process of falling sand requires the separation of residues, including mold openings, runners, gates, and flash. This process is usually done by extruding the casting with a special trimming die. Other methods of falling sand include sawing and sanding. If the gate is relatively fragile, the casting can be directly beaten, which can save manpower. The excess mold opening can be reused after melting. The usual yield is about 67%.
Of course, zinc die casting can also be the same. chinaweilong.cn
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