Injection molding, also known as injection molding, is a molding method of injection and molding. Dalian injection molding method has the advantages of fast production speed, high efficiency, automatic operation, many colors and varieties, simple to complex shapes, large to small sizes, accurate product sizes, easy renewal of products, and can form parts with complex shapes. Injection molding is suitable for mass production and molding processing fields such as products with complex shapes.

At a certain temperature, the fully molten plastic material is stirred by a screw, injected into the mold cavity with high pressure, cooled and solidified to obtain the molded product. This method is suitable for mass production of complex parts and is one of the important machining methods.

Dalian injection molding

Injection molding equipment and molds

1. Barrel temperature:

The temperature to be controlled in the injection molding process includes barrel temperature, nozzle temperature and mold temperature. The first two temperatures mainly affect the plasticization and flow of plastics, and the second temperature mainly affects the flow and cooling of plastics. Each plastic has different flow temperature. For the same plastic, due to different sources or brands, its flow temperature and decomposition temperature are different, which is due to different average molecular weight and molecular weight distribution. The plasticization process of plastics in different types of injection machines is also different, so the barrel temperature is also different.

2. Nozzle temperature:

The nozzle temperature is usually slightly lower than the maximum temperature of the barrel, which is to prevent the "salivation" of molten material in the straight through nozzle. The nozzle temperature should not be too low, otherwise it will cause the early setting of molten material and block the nozzle, or affect the performance of the product due to the injection of early setting material into the mold cavity.

3. Mold temperature:

Mold temperature has a great influence on the internal properties and apparent quality of products. The mold temperature depends on the crystallinity of the plastic, the size and structure of the product, performance requirements, and other process conditions (melt temperature, injection speed, injection pressure, molding cycle, etc.).