Mold manufacturing belongs to the equipment manufacturing industry. Although my country started manufacturing and using molds very early, it did not form an industry for a long time. It was not until 1980 that my country's mold industry began to develop on a large scale. In recent years, not only state-owned mold companies have made great progress, but also foreign-funded enterprises and township (individual) mold companies have also achieved rapid development.

However, with the development of the mold industry, there has been an imbalance in its supply and demand. The supply of some precision and complex large molds is in short supply. In addition, there is a big gap between the precision, life, manufacturing cycle and production capacity of my country's molds and developed countries. , So a large number of molds are imported every year.

Plastic products are widely used in daily life and play a pivotal role. Plastic products are basically processed at one time through molds, and injection molding processes dominate. As we all know, the quality, cost and production efficiency of plastic products are closely related to the structural performance of the mold. Therefore, the design and manufacture of injection molds with reasonable structure and excellent performance has become the focus of mold manufacturers.

Today, I want to introduce the gating system of injection mold to everyone, come and have a look!

The gating system is the plastic flow channel from the nozzle of the injection machine to the cavity. The channel is composed of the main flow channel, the runner channel, the gate and the cold material cavity. Its main function is to fill the molten plastic in the barrel of the injection machine into the cavity. In addition, it also plays a role in transmitting pressure.

1. Pouring sleeve (gate sleeve)

The sprue of the mold is designed as a detachable and replaceable sprue bushing, which is called a pouring sleeve or a sprue sleeve, which facilitates the processing and heat treatment of the raw materials, allowing the sprue to contact and collide with high-temperature plastics and nozzles.

Second, point gate

Point gates are small-size direct gates, also known as pin gates, olive gates or diamond gates. The diameter of the point gate is small, usually 0.5-1.5mm. After removing the gate, the residual traces are small, and the gate can be automatically broken when the mold is opened, which is beneficial to automatic operation.

Three, cold material hole

The cold material cavity is used to store the cold material generated in the injection interval to prevent the cold material from entering the cavity and affecting the quality of the plastic product. In addition, the cold material cavity can also make the melt fill the cavity smoothly. In general, the shape of the cold material cavity of the mold is a small cylindrical cavity.

The above is all the content of today, welcome everyone to leave a message in the comment area to discuss, if you are interested in the mold industry, please pay attention to the editor, there is a lot of mold knowledge waiting for you to discover!