What factors affect the size of injection molded products

The temperature and pressure changes of plastic injection molding have a great influence on the dimensional accuracy of plastic products, and are also affected by factors such as the time of use and environment. Therefore, in order to process high-precision products, you must first master the injection molding products What factors affect the size?

One: What factors affect the size of injection molded products?

1) Limited by the fluidity of plastic raw materials. Under certain equipment and injection molding conditions, plastics with good fluidity can be molded into larger-sized plastic parts; on the contrary, plastics with low fluidity can be molded into smaller plastic parts.

2) The size of injection molded products is also limited by injection molding equipment. The size of injection molded plastic parts is limited by the injection volume, clamping force and template size of the injection machine; the size of compressed and injection molded plastic parts is subject to the press z Large pressure and the limitation of the large size of the press table.

2: What are the factors that cause dimensional instability of Helmet Visor Mould?

1) The electrical and hydraulic system of the injection machine is unstable;

2) The feeding amount is unstable;

3) Uneven plastic particles and unstable shrinkage;

4) The injection molding conditions (temperature, pressure, time) change, and the molding cycle is inconsistent;

5) The gate of the injection mold is too small, the size of the multi-cavity feed port is inconsistent, and the feed is unbalanced;

6) The accuracy of the injection mold is poor, the movement of the movable parts is unstable, and the positioning is inaccurate.