General control of injection mold design:
1. First, we must fully understand the mold structure, material, hardness, precision and other aspects of the user's technical requirements, including whether the shrinkage rate of the formed plastic material is correct, whether the product 3D size modeling is complete, and reasonable processing analysis.
2. Full consideration should be given to all areas that affect the appearance of injection products, such as shrinkage holes, flow marks, draft angles, weld lines, and cracks.
3. Simplify the processing method of the mold as much as possible without hindering the product function and pattern shaping of the injection molded part.
4. Whether the selection of the parting surface is appropriate, the mold processing, the appearance of the forming and the deburring of the formed parts must be carefully selected.
5. Whether the ejection method is appropriate, whether the push rod, discharge plate, ejection sleeve, etc. are used or other methods, and whether the position of the push rod and the discharge plate is appropriate.
6. Whether the side core pulling mechanism is suitable, flexible and reliable in action, and there should be no jamming.
7. Which method of temperature control is more suitable for plastic products, what kind of structure circulation system is used for temperature control oil, temperature control water, coolant, etc., and whether the size, number, and location of the coolant holes are appropriate.
8. The gate type, the size of the material channel and the feed port, and whether the gate position and size are appropriate.
9. The influence of heat treatment deformation of various modules and mold cores and whether the selection of standard parts is appropriate.
10. Whether the injection volume of the injection molding machine, the injection pressure and the clamping force are sufficient, whether the nozzle R, the aperture of the sprue sleeve, etc. match properly

Control of injection mold process manufacturing:
1. Choose economically suitable machine tools and make 2D and 3D processing schemes.
2. Appropriate tooling and fixtures can also be considered for auxiliary preparations in production. The reasonable use of tools can prevent product deformations, prevent product shrinkage fluctuations, prevent product demolding deformation, improve mold manufacturing accuracy, and reduce Small errors, prevent changes in mold accuracy, etc., a series of production process requirements and solutions.
3. Here are the reasons for the size error of the formed parts of the British Plastics Association (BPF) and the distribution of the proportions:
A: The mold manufacturing error is about 1/3, B: The error caused by mold wear is 1/6, C: The error caused by the unbalanced shrinkage rate of the molded part is about 1/3, D: The predetermined shrinkage rate is inconsistent with the actual shrinkage rate The resulting error is about 1/6
The total error=A+B+C+D, so it can be seen that the mold manufacturing tolerance should be less than 1/3 of the dimensional tolerance of the formed part, otherwise it is difficult for the mold to guarantee the geometric size of the formed part.