Die casting mold design is a very important part of the die casting production process, which not only determines the quality and precision of the die casting products, but also the lifetime and maintenance of the die casting mold. So what are the aspects we should pay attention to when designing die casting moulds or tooling? As you know, we have over 20 years of experience in die casting design and production. We have encountered many problems with die casting dies and products, so today we will talk about the elements of die casting die design.
Die Casting Meaning and definition.
Die Casting also called as High Pressure die casting, molten alloy liquid is poured into a press chamber, the cavity of a steel mold is filled at high speed, and the alloy liquid is solidified under pressure to form a casting. The main characteristics of die casting are high pressure and high speed.
| Type of Metal alloy | Tempreture of Molten | Shrinkage |
|---|---|---|
| Aluminium alloy | 600-700 | 0.6% |
| Zinc alloy | 400-450 | 0.5% |
| Magnesium alloy | 640-700 | 0.5% |
Parts design
Die Casting part design need to be pay attention to. Such as, Even wall thickness, Good Draft Angle. Boss and Hole design all these need to be check one by one. These will define die casting mold success or not. as a mold design and making factory for aluminum and zinc alloy, We Can run mold flow analysis and DFM(Design For Manufacturing) to check. It can predict the problems of products and molds in the die-casting process, as well as the preventive measures we can take. It will be great tool for die casting design beginner. Suggest to use it on daily die casting parts design stage.
Die or Tooling Material
The mold core steel is H13, SKD61 or 8407, and the heat treatment is generally to HRC48-52, which is basically the same as the plastic injection mold
Die Casting Mold Layout
Die Casting Tooling layout is generally symmetrical, and the gate is generally eccentrically inserted from the side on cold chamber die Casting, and the product is at least 40mm away from the mould die edge.
Divider
The Die casting Divider is generally higher than 30mm, and the draft angle is 5 degrees on single side. The standard size is generally 50mm in diameter.
Runner
Die-casting trapezoidal runner is generally 20-30mm wide, 8-10mm depth, 15-20 degrees with single-side draft angle, bottom make radius R2-3. Generally, the runner will be made on Core side, , it can be made on cavity side, when there have 4 sliders on 4 direction. The common ones are fan-shaped, T-shaped. They are often made some steps for the purpose of changing the speed and improving the quality.
Draft Angle
die-casting product must have a minimum of 1 degree draft angle; and a minimum of 2 degrees for hole.
Cooling systems
Die Casting Mold cooling Channel is generally 20-25mm away from the product, at least 15mm. Otherwise, water lines will appear on the product.
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