How much do you know about the required knowledge of die casting molds? Let's follow the editor of Die casting processing in china for a brief understanding!
1. The entrance of the runner of the cold horizontal mold should generally be located at more than 2/3 of the inner diameter of the upper part of the pressure chamber, so as to prevent the molten metal in the pressure chamber from entering the runner prematurely under the action of gravity and starting to solidify in advance.
2. The cross-sectional area of ​​the runner should gradually decrease from the sprue to the inner gate. If the cross-section is enlarged, negative pressure will appear when the molten metal flows through, and it is easy to inhale the gas on the parting surface and increase the molten metal. The eddies in the flow envelop the air. Generally, the section at the outlet is 10-30% smaller than that at the inlet.

3. The runner should have a certain length and depth. The purpose of maintaining a certain length is to stabilize the flow and guide. If the depth is not enough, the molten metal will cool down quickly, and if the depth is too deep, the condensation will be too slow, which will not only affect the productivity but also increase the amount of return material.
4. The cross-sectional area of ​​the runner should be larger than the cross-sectional area of ​​the inner gate to ensure the speed of the molten metal entering the mold. The cross-sectional area of ​​the main runner should be larger than that of each branch runner.
5. The two sides of the bottom of the runner should be rounded to avoid early cracks, and the two sides can be inclined at about 5°.
The above is what Die casting processing in china tells: a brief introduction to the required knowledge of die casting molds.