Summary of automobile headlight lens mold technology

Summary of automobile headlight lens mold technologyCar headlight lens, also known as light lens, is the outermost transparent part of car headlight. The internal and external surface transparency requirements are extremely high.

Plastic parts features: transparent color, extremely high appearance requirements, no spots, gate and push rod marks, and no bubbles, halo, shrinkage, depression, weld line, and other molding defects.

In view of the transparent color of the plastic parts, the use of ordinary runners can avoid the color difference of the plastic parts and improve the transparency, and the appearance of the plastic parts is not allowed to have gate marks, so the side gate pouring system is adopted.

The mold adopts a combined cooling system of "vertical cooling water pipe, inclined cooling water pipe, and partition well". The water channels are arranged along the cavity, which effectively ensures the accuracy of the plastic parts and the labor productivity of the mold. The plastic parts are pushed out by the push block, which is not only stable, but also the traces of the line will not affect the appearance of the product.

The design of the exhaust system is very important in the molding of the transparent mold. If the exhaust is poor, it will seriously affect the quality of the plastic parts. Since the product material is PC, the exhaust front end is designed to be 0.02mm. It is reasonable to refer to the CAE analysis around the product. The designed exhaust air reduces local burns caused by bubbles or trapped air during injection molding.

Since the mold was released from production, the movement has been stable and smooth, and all the quality indicators of the plastic parts have reached the design requirements.