What are the requirements for temperature control during the injection molding process?

Injection molding process is also called injection molding, which is a kind of injection and molding molding method. The advantages of injection molding process are fast production speed, high efficiency, automation of operation, variety of colors, simple to complex shapes, large to small sizes, and accurate product sizes, easy to update products, and the ability to form complex shaped parts. The injection molding process is suitable for mass production and complex shaped products in the molding processing field.


What are the requirements for temperature control of injection molding process?

1. Barrel temperature.

Injection molding process needs to control the temperature of the barrel temperature, nozzle temperature and mold temperature. The first two temperatures mainly affect the plasticization and flow of plastic, while the latter temperature mainly affects the flow and cooling of plastic.

Each plastic has a different flow temperature, the same plastic, due to different sources or grades, its flow temperature and decomposition temperature is different, this is due to the average molecular weight and molecular weight distribution is different, plastic in different types of injection machine plasticization process is also different, and therefore the choice of barrel temperature is not the same.

2. Nozzle temperature.

Nozzle temperature is usually slightly lower than the maximum barrel temperature, which is to prevent the melt in the straight-through nozzle may occur "salivation phenomenon". Nozzle temperature can not be too low, otherwise it will cause early condensation of the melt and the nozzle will be blocked, or due to early condensation of the material into the cavity and affect the performance of the product.

3. Mold temperature.

Mold temperature has a great impact on the intrinsic properties and apparent quality of the product. The temperature of the mold is determined by the presence or absence of plastic crystallinity, the size and structure of the product, performance requirements, and other process conditions (melt temperature, injection speed and injection pressure, molding cycle, etc.).