Plastic mold is a plastic processing industry and plastic molding machine supporting, given plastic products in a complete configuration and precise size of the tool. According to the different molding methods, can be divided into different types of molds.
1. Injection mold
It is mainly used in the production of thermoplastic products, the most common type of forming mold, injection mold corresponding processing equipment is the injection molding machine, the plastic first heated in the injection molding machine barrel melting, and then in the injection molding machine screw or column Cypriot push, the injection molding machine nozzle and mold casting system into the mold cavity, plastic cooling hardening molding, demoulding products.
Its structure is usually made of plastic mold steel, such as forming part, casting system, guide part, pushing mechanism, temperature control system, exhaust system, supporting parts and etc. The injection molding processing method is usually only suitable for the production of thermoplastic products , Plastic injection molding process is very wide range of products, from daily necessities of life to all kinds of complex electrical appliances, auto parts are molded with injection molding, plastic products it is the most widely used in the production of a processing method.
2. Blow mold
Used to mold plastic containers hollow products (such as beverage bottles, cosmetic products, and other packaging containers) of a mold, the main form of blow molding extrusion process according to the principle of hollow blow molding, injection molding in the form of technology The main principles are hollow blow molding extrusion, injection blow molding, injection stretch blow molding (commonly known as injection stretch blow molding), multi-layer blow molding, hollow blow molding sheet.
Blow molding of hollow products corresponding to the equipment commonly known as plastic blow molding machine, blow molding only applies to the production of hot plastic variety of products. Blow mold structure is relatively simple, the material used to make more carbon.
3. Extrude the mold
Used to form a series of molds for the production of continuous shaped plastic products, also known as extrusion molding machine head, widely used in the processing of pipe, rod, monofilament, sheet, film, wire and cable coating, profile and so on.
The corresponding production equipment is a plastic extruder, the principle of which is that the solid plastic is melted and plasticized under the conditions of heating and screw rotation pressurization of the extruder, and the cross section and the shape of the die are made through the die of a specific shape Continuous plastic products. Its manufacturing materials are mainly carbon structural steel, alloy tools, and some extrusion dies in the need to wear parts will be embedded with diamond wear-resistant materials.
In general, the extrusion process is only suitable for the production of thermoplastic product, which is obviously different in structure from the injection mold and the compression mold.
4. Blister mold
The plastic plate, sheet as raw material to form some simple plastic products, a die, the principle is to use vacuum or blooming method of compressed air forming method fixed in the die or punch on the plastic plate, sheet, in the heating Soften the deformation and attached to the cavity of the mold to obtain the desired molding products, mainly for some daily necessities, food, toys, packaging products production.
Plastic mold due to the molding pressure is low, so the mold material and more use of cast aluminum or non-metallic materials, the structure is relatively simple.
5. Compression mold
Including compression molding and injection molding two types of mold structure, they are mainly used to form thermosetting plastic mold, the corresponding equipment is a pressure molding machine.
Compression molding method According to the characteristics of plastic, the mold is heated to the molding temperature (usually 103 ° 108 °), and then the measured pressure of plastic powder into the mold cavity and the feeding chamber, closing the mold, the plastic under high heat and pressure was Soften viscous flow, after a certain period of time stereotypes stereotypes, as the desired product shape.
Pressure injection molding and compression molding is different from there is no separate feeding chamber, mold closed before molding, plastic in the feeding room to complete the preheated viscous flow, under pressure to squeeze into the mold cavity, hardening molding.
Compression mold mainly by the cavity, feeding chamber, guide agencies, the introduction of components, heating systems, etc .. Injection mold is widely used in the packaging of electrical components.Compression molding material used in the manufacture of molds and injection molds are basically the same.
6. High-foaming polystyrene molding mold
Is a mold made from a raw material of expandable polystyrene (a bead composed of polystyrene and a blowing agent) to form a foam packaging material of various desired shapes.
Its principle is to be able to send polystyrene in the mold can be steam into the shape, including simple manual operation of the mold and hydraulic machine through the foam mold two types, mainly for the production of industrial products packaging products made of this mold material Cast aluminum, stainless steel, bronze and so on.