What is the working principle of plastic injection mold?

What is the working principle of plastic injection mold?

Plastic injection mold is a kind of equipment for molding plastic products. The working principle is to use the mold cavity and pouring system to inject the molten plastic into the mold, and get the plastic products of the required shape and size after cooling.

Plastic injection molds are usually composed of upper and lower lobes, the upper lobe is called the upper mold, and the lower lobe is called the lower mold. The cavity of the die is usually located between the upper die and the lower die, and when the die is closed, the cavity is completely closed. The gating system is located at the upper part of the mold and includes a feed port and a flow channel connected to the mold cavity to introduce the molten plastic into the mold cavity.

In the production process, the plastic raw material is first added to the hopper and heated to a molten state. The molten plastic is then pushed into the pouring system of the mold through an injection device. The injection device is usually composed of an injection screw and an injection cylinder. The injection screw pushes the molten plastic into the injection cylinder, and the injection cylinder infuses the plastic into the pouring system. The flow channels in the pouring system introduce the molten plastic into the cavity and fill the cavity.

广东永超科技模具车间图片09

After the plastic fills the cavity, the mold is cooled, and the plastic cools and solidifies inside the cavity. The mold is then opened and the cured plastic product falls out of the cavity. In order to make the plastic products fall off smoothly, the ejector mechanism, such as the ejector rod and the thimble, is usually set up in the lower die of the mold.

In the production process of plastic products, injection molds play a very important role. Through the mold cavity and pouring system, plastic products of various shapes and sizes can be manufactured. At the same time, the cooling system and ejector mechanism of the mold can ensure the quality and production efficiency of the plastic products.

In short, the working principle of plastic injection molds is to inject the molten plastic into the mold cavity, and get the plastic products of the desired shape and size after cooling. This process requires the synergy of the mold pouring system, cooling system and ejector mechanism to achieve.


Post time: Nov-23-2023