Therefore, in order to make the mold more efficiently, injection mold processors start to use some standard mold blanks. In the custom mold opening, injection mold processors only need to make different molding parts to mold different plastic products, which greatly reduces the time of injection mold processing. So what are the problems that injection mold processors need to pay attention to when choosing standard mold embryos?

First, the thickness of the mold embryo and the closing distance of the injection molding machine are different for different models and specifications of injection molding machines, and the closing distance of the clamping mechanism of different structural forms is also different.

Second, the relationship between the injection mold opening stroke and the distance between the front and rear mold separation and the required stroke of the ejected parts must be clear in the design, the mold stroke should be greater than the distance between the front and rear mold separation required to take out the plastic parts, and the distance required to eject the plastic parts should be less than the rated stroke of the injection molding machine ejector hydraulic cylinder.

Third, injection mold processing plant in the installation of standard mold frame should pay attention to the following matters:

1) the standard mold embryo shape size should not be affected by the spacing of the injection machine tie bar;

2) the positioning aperture and the positioning ring size should be well matched;

3) whether the position of the injection machine push-out mechanism and the stroke of the top bar are appropriate;

4) whether the nozzle aperture and spherical radius match the size of the casting sleeve aperture and spherical recess of the mold;

5) The position and aperture of the mold embryo mounting hole should match with the corresponding screw holes on the mobile template and fixed template of the injection molding machine.

IV. When the injection mold processing plant selects the mold frame, it needs to understand the technical requirements of plastic parts and its injection molding process to guarantee the performance and reliability of plastic parts and injection mold, and it needs to verify and calculate the mechanical properties of mold embryo parts, especially the strength and stiffness of mold embryo, to ensure that the dimensions of front and rear mold and support plate meet the requirements of mold structure.