Plastic mold is a tool used in the plastic processing industry to match plastic molding machines, giving plastic products a complete configuration and precise dimensions. According to different molding methods, it can be divided into different mold types.

1. Injection mould

     It is mainly a molding mold most commonly used in the production of thermoplastic plastic parts. The processing equipment corresponding to the injection mold is an injection molding machine. The plastic is first heated and melted in the heating barrel at the bottom of the injection molding machine, and then in the screw or column of the injection molding machine. Under the push of the plug, it enters the mold cavity through the injection system of the injection molding machine nozzle and the mold, the plastic is cooled and hardened, and the product is released from the mold.

     Its structure is usually composed of molded parts, pouring system, guide parts, ejection mechanism, temperature adjustment system, exhaust system, support parts and other parts, and is made of plastic mold steel. The injection molding processing method is usually only suitable for the production of thermoplastic products. The plastic products produced by the injection molding process are very wide. From daily necessities to various complicated electrical appliances, automobile parts, etc., they are formed by injection molds. One of the most widely used processing methods in the production of plastic products.

2. Blow mould

A mold used to form hollow products of plastic containers (such as beverage bottles, daily necessities, and other packaging containers). The form of blow molding is based on the principle of technology. The main forms are extrusion blow molding, hollow molding, and injection molding. The main principles are extrusion blow molding hollow molding, injection blow molding hollow molding, injection stretch blow molding hollow molding (commonly known as injection stretch blow molding), multilayer blow molding hollow molding, and sheet blow molding hollow molding. The equipment corresponding to the blow molding of hollow products is usually called a plastic blow molding machine. Blow molding is only suitable for the production of thermoplastic products. The structure of the blow mold is relatively simple, and the materials used are mostly made of carbon.

3. Extrusion die

A type of mold used to produce continuous-shaped plastic products, also known as extrusion molding heads, is widely used in the processing of pipes, rods, monofilaments, plates, films, wire and cable coatings, and shaped materials.

The corresponding production equipment is a plastic extruder, the principle of which is that solid plastic is melted and plasticized under the conditions of heating and screw rotation and pressure of the extruder, and is made into a cross-section with the shape of the die by a specific shape Continuous plastic products. Its manufacturing materials mainly include carbon structural steel, alloy tools, etc. Some extrusion dies are also inlaid with diamond and other wear-resistant materials on the parts that need to be wear-resistant.

Extrusion process technology is usually only suitable for the production of thermoplastic products, which is obviously different from injection molds and compression molds in structure.

4. Plastic mold

A mold that uses plastic plates and sheets as raw materials to form some simpler plastic products. Its principle is to use vacuum blooming methods or compressed air forming methods to make the plastic plates and sheets fixed on the concave or convex molds heated In the case of softening, it deforms and sticks to the cavity of the mold to obtain the desired molded product, which is mainly used in the production of some daily necessities, food, and toys.

The plastic mold has low pressure during molding, so the mold material is mostly made of cast aluminum or non-metallic materials, and the structure is relatively simple.

5. Compression mould

Including compression molding and injection molding two structural mold types. They are a type of mold mainly used for molding thermosetting plastics, and the corresponding equipment is a pressure molding machine.

According to the characteristics of plastics, the compression molding method heats the mold to the molding temperature (usually at 103 ° 108 °), and then puts the measured compression molding powder into the mold cavity and the charging chamber, and closes the mold. Softens the viscous flow, solidifies and sets after a certain period of time, and becomes the desired product shape.

The difference between compression injection molding and compression molding is that there is no separate feeding chamber. The mold is closed before molding. The plastic is preheated in the feeding chamber in a viscous state. Under pressure, it is adjusted into the mold cavity and hardened.

Compression mold is mainly composed of cavity, feeding cavity, guide mechanism, ejecting parts, heating system and so on. Pressure injection molds are widely used to encapsulate electrical components. The materials used in the manufacture of compression molds are basically the same as injection molds.

6. High foaming polystyrene mould

It is a mold that uses expandable polystyrene (beads composed of polystyrene and foaming agent) to form foam packaging materials of various shapes.

The principle is that expandable polystyrene can be steam-formed in the mold, including two types of simple manual operation mold and hydraulic straight-through foam plastic mold, which are mainly used to produce packaging products for industrial products. The materials for manufacturing such molds are cast aluminum, stainless steel, bronze and so on.