How should the plastic mold venting system be designed? Mold design has always been an indispensable part of the machinery industry. Plastic molds are tools used in the plastics processing industry to match plastic molding machines, giving plastic products a complete configuration and precise dimensions. Due to the variety of plastics and processing methods, the structure of plastic molding machines and plastic products is complicated, so the types and structures of plastic molds are also diverse. Let's take a look at how the exhaust system should be designed in a plastic mold:
In the process of injection and clamping, the excess gas in the mold must be discharged in time to ensure the quality of the product and the smoothness of the mold clamping. The venting system includes: product exhaust, guide sleeve exhaust etc.
1. Partition surface exhaust
It is usually placed around the cavity, but it is sometimes placed around the core or around the cavity and core. Usually, the flow channel should also be provided with a venting groove, especially the opposite side of the gate. The depth of the venting groove is closely related to the material viscosity. The depth of the venting groove is generally 0.02~0.03, and the width is 5~8MM. After the length of 6, the depth of the mold is taken out at a depth of 0.5 to avoid facing the operator.
2, Eject Pin venting
Large deep cavity products are very suitable for ejector venting, which can be 0.02~~0.03. At the same time, eject pin vanting can also be used when there are defects such as charring in the middle of the product.
3, Insert venting
The deep rib position on the product is often inlaid with a mosaic structure, which is convenient for processing and venting.
4, Guide sleeve venting slot
The venting groove on the guide sleeve is generally 5-8 mm wide and 0.5-1.0 mm deep.