Difference between die casting mold and plastic mold:

Difference between die casting mold and plastic mold:

1. the injection pressure of the die-casting mold is large, so the template is required to be relatively thick to prevent deformation

2. the gate of the die-casting mold is different from the injection mold, and a splitter cone is required to decompose the high pressure of the material flow

3. the die core of the die casting die does not need to be quenched because the temperature in the die cavity exceeds 700 ° C during die casting. So each forming is equivalent to quenching. The cavity will become harder and harder. The general injection mold should be quenched to above hrc52.

4. generally, the die-casting mold cavity shall be nitrided to prevent the alloy from sticking to the mold cavity.

5. generally, the die-casting mold is corroded greatly, and the outer surface is generally blued.

6. compared with the injection mold, the fitting clearance of the movable fitting part of the die-casting mold (such as the core pulling slider) is larger, because the high temperature of the die-casting process will cause thermal expansion. If the clearance is too small, the die will be stuck.

7. the matching requirements of parting surface of die-casting die are higher, because the fluidity of alloy is much better than that of plastic. It is very dangerous for high temperature and high pressure material flow to fly out of the parting surface

8. generally, the injection mold can be vented by the ejector pin and parting surface. The die-casting mold must be provided with an exhaust slot and a slag collection bag (to collect the cold material head);

9. the molding is inconsistent, the injection speed of the die-casting mold is fast, and the injection pressure of one section is high. Plastic molds are usually injected in several sections to maintain pressure.

10. the die-casting mold is a two plate mold (I haven't seen a three plate die-casting mold for the time being). The product structures of different plastic molds are different. Three plate molds are common. The number and sequence of mold opening are consistent with the mold structure. Our die-casting die usually does not use square thimble, cylinder, and inclined pin (high temperature and good solution fluidity) are easy to get stuck, resulting in unstable die production.

In addition, the steel used for plastic mold and Dalian die-casting mold is different; Plastic molds generally use 45\y steel, T8, T10 and other steels, while die-casting molds mainly use heat-resistant steels such as 3Cr2W8V.