What are the basic knowledge of plastic mold structure?

The plastic mold structure refers to the composition and structure of the mold used to manufacture plastic products, which mainly includes 9 aspects such as the mold base, mold cavity, mold core, gate system, and cooling system.

The following details the basic knowledge of plastic mold structure:

(1) Mold base: Mold base is the main support part of the mold, usually made of steel plate or cast iron. It provides the stability and rigidity of the mold to ensure that the mold does not deform or vibrate during use.

(2) Mold cavity: The mold cavity is the cavity part used to form the shape of plastic products. Its shape and size are consistent with the final product. The mold cavity can be divided into upper cavity and lower cavity, and the product is formed through the coordination of upper and lower cavity.

(3) Mold core: The mold core is the part used to form the internal cavity of the plastic product. Its shape and size are consistent with the internal structure of the final product. The mold core is usually located inside the mold cavity, and the product is formed through the combination of the mold cavity and the mold core.

(4) Gate system: The gate system is the part used to inject molten plastic materials. It includes main gate, auxiliary gate and auxiliary gate, etc. The main gate is the main channel for the molten plastic material to enter the mold, and the secondary gate and the auxiliary gate are used to assist in filling the mold cavity and core.

(5) Cooling system: The cooling system is used to control the temperature of the mold. It includes a cooling water channel and a cooling nozzle, etc. The cooling channel absorbs the heat generated in the mold by circulating the cooling water to keep the mold within the appropriate temperature range.

(6) Exhaust system: The exhaust system is the part used to remove the gas produced in the mold. During the injection molding process, the molten plastic will produce gas, which, if not eliminated in time, will lead to bubbles or defects in the product. Exhaust system by setting exhaust groove, exhaust hole, etc., to achieve gas removal.

(7) Positioning system: The positioning system is used to ensure the accurate positioning of the mold cavity and core. The utility model comprises a positioning pin, a positioning sleeve and a positioning plate, etc. The positioning system enables the mold cavity and core to maintain the correct position when closed to ensure the consistency of the size and shape of the product.

(8) Injection system: injection system is used to inject the molten plastic material into the mold part. The invention comprises an injection cylinder, an injection nozzle and an injection mechanism, etc. The injection system pushes molten plastic material into the mold cavity and core by controlling the pressure and speed of the injection cylinder.

(9) Demoulding system: The demoulding system is used to remove the molded product from the mold. The utility model comprises an ejector rod, an ejector plate and an ejector mechanism, etc. The ejector rod is used to push the molded product out of the mold cavity for further processing and packaging.

To sum up, the basic knowledge of plastic mold structure includes mold base, mold cavity, mold core, gate system, cooling system, exhaust system, positioning system, injection system and release system. These components cooperate with each other to complete the molding process of plastic products. Understanding and mastering these basic knowledge is essential to the design and manufacture of high-quality plastic molds.