Plastic molding plastic mold in the import category – mold, molding – plastics i
HC plastic mesh : Mold is a major technical equipment of modern industry, the production of many industrial products, an indispensable component. China's accession to WTO, ability to attract foreign investment increased year by year as the world's increasingly prominent position of manufacturing plants, various industrial products import more and more mold.
Type of mold is usually processed objects and processes in accordance with the different classification, the distinction from the industry point of view mainly Plastic mold , Rubber mold, the metal of the cold die, Metal extrusion die of cold and hot extrusion dies, metal drawing dies, powder Metallurgy Molds, metal casting molds, metal casting molds, glass molds, glass, steel mold, etc..
Following only in respect of imports of the most common Plastic Products Forming in the different types of mold how to classify, introduction.
The most common plastic molding methods are generally divided into the melt molding and solid forming two main categories: melt the plastic molding is heated to above melting point, so that in the molten state for molding the way, is such a molding method The molding process mainly injection molding, compression molding (reduced) molding, extrusion, etc.; solid phase plastic molding is maintained in the melting temperature of solid-state under the following molding method for a class, as some plastic vacuum forming packaging container production, compressed air and other molding and blow molding. There is also liquid molding methods, such as casting plastic molding, slush and dip dip molding method.
Different forming methods in accordance with the above can be divided into the corresponding technical requirements of plastic processing different types of molds, mainly injection mold, extrusion mold, pressing plastic mold, blow mold, plastic mold, high bubble Polystyrene Mold and so on.
Injection (plastic) molds It is mainly the production of thermoplastic items most widely used as a mold, plastic injection mold corresponding to the processing equipment is plastic injection molding machine, plastic injection machine at the end of the first heating Barrel Melt in heat, and then the injection machine screw or a plunger, driven by the injection machine nozzle and mold gating system into the mold cavity, cooling hardening plastic molding, mold release by products. Usually forming part of its structure, gating system, oriented components, introduced institutions, thermostat systems, exhaust systems, components and other supporting components. Manufacture of materials commonly used plastic mold steel module, the material used mainly for carbon steel, carbon tool steel, alloy tool steel, high speed steel. Injection molding processing methods usually apply only to the production of thermoplastic varieties of products, manufactured using injection molding process a wide range of plastic products, from daily life to all kinds of complex mechanical, electrical, transport and other parts are injection molding, and It is the production of plastic products, a process most widely used method.
Plastic compression molds
Including compression molding and injection compression molding die two structure types. They are mainly used to shape a class of thermosetting plastic mold, such that the corresponding device is a pressure molding machine. Compression molding method is based plastic features, the mold heated to forming temperature (usually in the 103 -180 ), then a good measure pressure plastic powder into the mold cavity and the feeding room, closed mold, plastic at high temperature, high pressure tends to soften the viscous flow, after a certain time after the curing stereotypes, as the shape of the required products. Pressure injection molding and compression molding is different with a separate feeding room, before forming the first closed mold, plastic, finished in warm indoor feeding was viscous flow state, under pressure and speed to squeeze into the mold cavity, curing molding. Compression mold is also used to shape some of the special hard to melt thermoplastics such as thermoplastic (such as PTFE) rough (cold forming), the optical properties of high resin lens, slight foaming of the cellulose nitrate Car Steering wheel. Compression molds mainly by the cavity, feeding cavity, oriented institutions, introduction of components, heating systems and other components. Pressure injection molds are widely used in packaging electrical components area. Manufacture of compression molds and injection molds used in the same material.
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