What should I pay attention to when opening a plastic mold?

Pay attention to the following points when opening automotive moulds:
1. Post-processing of plastic mold materials is not required, because the plastic is soft and does not require special requirements such as hardness, and the heat treatment process may cause mold deformation.
2. The cooling (water passage) in the mold is related to factors such as product size, shape, plastic properties, and pressure holding time.
3. The roughness level in the cavity of the mold must reach the "mirror level", otherwise the product will be difficult to demold, and the product will be damaged due to excessive force when it is ejected. The roughness of positioning pins, clamping surfaces and other parts are all regulated by standards.

4. The plastic mold must have sufficient rigidity, otherwise it will deform when the mold is clamped and held, causing "flash".
5. The plastic mold should choose a reasonable exhaust position and its volume control. Otherwise, plastic injection will be dissatisfied and the product will be "out of material".
6. The injection channel should be selected reasonably, so that the material can reach each place evenly (the flow path is equal), and there should be enough storage to ensure that the plastic is supplied with the plastic during the shrinking process.
7. The shrinkage coefficient of each material is different, and the mold must have a reasonable shrinkage rate.
8. Choose a reasonable demoulding method, choose a reasonable position and quantity of ejector pins, to ensure that the product is not damaged during ejection.
9. The fixing method of the mold and the injection molding machine should be reasonable, reliable and firm to prevent accidents caused by displacement when the mold is closed. And to be easy to disassemble.