What are the issues need to be paid attention to in mold design before transparent parts processed

In the field of plastics processing, transparent parts injection molding is a technically demanding process, which not only requires precise mechanical operation, but also requires adequate planning in the mold design stage. For transparent parts injection molding, mold design is the basis and key, the design of good and bad directly affect the quality of the finished product and production efficiency. So, in the design of transparent parts of the injection mold, need to pay attention to what problems?

Transparent parts are characterized by high transparency and good optical properties, so the choice of materials should be very careful. Mould materials need to have sufficient strength, hardness and excellent polishing properties, to ensure that the molded product is flawless, high surface finish.

In addition to the choice of materials, mold design also need to consider the injection molding shrinkage. Different plastic materials have different shrinkage rates, the designer needs to set the appropriate shrinkage parameters according to the actual use of plastic materials to ensure that the molded product size is accurate, in line with the design requirements.

The design of the cooling system should not be ignored. Temperature control is very important in the injection molding process of transparent parts. Uneven temperature will lead to product deformation, internal stress and other problems. Therefore, reasonable cooling water circuit design should be considered during mold design to ensure uniform temperature distribution throughout the mold, thus ensuring the dimensional stability and transparency of the product.

The design of the gate is equally important. Transparent parts often have higher requirements on the location and form of the gate, because the location of the gate will directly affect the appearance and mechanical properties of the product. When designing, it is necessary to consider how to minimize the trace of the gate, and sometimes it is even necessary to adopt hot runner or fine gate technology to reduce the trace. At the same time, a reasonable arrangement of the gate can effectively avoid the production of defects such as fusion lines and air bubbles.

The design of the release angle is also a crucial part. In order to ensure that transparent parts can be smoothly released from the mold without scratching, the mold design must take into account sufficient release angles. This requires detailed calculations based on the geometric characteristics of the different parts and the shrinkage properties of the plastic material.

During the mold design process, special attention should also be paid to the setup of the exhaust system. Transparent parts in the molding process if the presence of gas can not be discharged in a timely manner, the formation of bubbles or silver lines, seriously affecting the product's light transmission and appearance. Therefore, the reasonable layout of the exhaust slot and the use of exhaust pins and other tools is crucial.