Injection molding: also known as injection molding, this method of injection and molding. There are many advantages of injection molding, and the general summary is fast production speed, high efficiency, automatic operation, variety of design, simple shape, small size, accurate product size, convenient product update, complex shape and so on. And suitable for mass production and complex shape products and other molding injection processing fields.
Summary:
1. Process cost: the mold cost is high but the unit cost is low;
3. Suitable for production: generally only suitable for mass production;
4. Quality: high surface accuracy, the same batch of products shape error is very small;
5. Speed: 30s-60s/ PCS;
Factors affecting the quality of injection molding
1. Injection pressure: the reason for the need for injection pressure is to offset the resistance in the process of melt flow, or the resistance in the process of flow to the pressure of the injection machine to remove, the two are just the opposite, in order to ensure the smooth progress of the filling environment;
2. Injection time: reasonable injection time is conducive to the ideal filling of the melt, and the ear is very important to improve the surface quality of the product and reduce the dimensional tolerance;
3. Injection temperature: the injection temperature must be controlled within the range of M, the temperature is too low, the plasticization of molten materials is not good, which affects the quality of forming parts and increases the difficulty of processing; If the temperature is too high, the raw material is easy to decompose;
Of course, injection molding also has disadvantages.
Two, the shortcomings of injection molding process
1, the product molding must use injection molding and blow molding two sets of molds and a hollow core mold with valve, and the injection mold should be able to withstand high pressure, molding equipment cost is high;
2. The temperature of the injection blank is high, and it needs a long cooling and shaping time after blowing in the injection mold, which prolongs the whole molding cycle of the product and affects the production efficiency.
3. The internal stress of the injection molding blank is large, and it is easy to be subjected to uneven cooling during the transformation of the mold. Stress cracking is easy to occur when producing products with complex shapes and large sizes.
4. The operation skills of the operators are higher.
