Precautions for the size and accuracy of mold processing

Injection mold with the appearance of the product requirements change, size and precision of the grasp is very important, in the design of the size needs to be considered in many ways.
First of all, mold processing design from the aesthetic point of view of the shape of plastic parts, plastic parts due to the flow of melting factors, poor mobility of plastic materials and wall thin plastic parts, the design size as simple as possible, otherwise it is easy to lead to insufficient filling of melt material, affecting the appearance of the product beautiful, must need a large size, You can choose to change the material stoic or adjust the thickness of the wall slightly.
Second, the size accuracy of the product. Plastic melt in the production process will produce a certain shrinkage rate and slight expansion, mainly plastic melt in the process of forming will lead to size shrinkage, resulting in the size of inaccuracy. The shrinkage process mainly has forming shrinkage and post-shrinkage, which is affected by forming contraction is relatively large, causing a variety of factors to shrink, in the mold processing process, it is necessary to consider the performance of the raw materials of plastic parts, to avoid the size of inaccuracy.
The size and precision of the mold need to be designed reasonably from the mold in the molding process, reducing production costs and improving product quality.