The main categories of plastic molds

According to different molding methods can be divided into the corresponding requirements of the different process types of plastics processing molds , mainly injection mold , extrusion mold, plastic mold, high mold foamed polystyrene and the like. 1, plastic injection ( plastic ) molds it is mainly the production of thermoplastic products in the most common type of mold, plastic injection mold corresponding processing equipment is plastic injection molding , plastic injection molding machine in the  PE Electrofusion Pipe Fitting first heat heating barrel bottom melted and then push in the plunger or a screw injection molding machine , injection machine nozzle and the mold after the casting system into the mold cavity , and cooled and solidified plastic molded article obtained release . The structure usually consists of molded parts , injection system , the guide member , the introduction of some institutions , thermostat systems, exhaust systems, supporting members and other components. Manufacturing materials commonly used plastic mold steel modules, the material used mainly for carbon structural steel, carbon tool steel , alloy tool steel, high speed steel. Injection molding processing methods usually only suitable for hot plastic goods products production, injection molding process to produce a wide range of plastic products , from daily necessities of life to all kinds of complex mechanical , electrical appliances , vehicles and other parts are made of injection molding , it is the production of plastic products, the most widely used as a processing method . 2 , plastic compression molds
Including pressure injection molding and compression molding two structures mold type. They are mainly used for forming a class of thermosetting plastic mold , it corresponds to the device is a pressure molding machine. The plastic properties of the compression molding method , the mold is heated to a molding temperature ( generally 103 ° -108 °), and then compression-molding the powder into a good measure of the mold cavity and the loading chamber , closing the mold , heat and high pressure in the plastic viscous flow was softened , after a certain curing time setting, into a desired shape of the article . Pressure injection molding and compression molding except that End Cap mould  no separate loading chamber , before forming the first mold is closed , the room warms up in the feed of plastic viscous flow state was in the mold cavity pressure adjusting squeeze hardened molding. Compression molding of thermoplastic mold also used some special molten thermoplastic such as difficulty ( such as poly vinyl fluoride ) rough ( cold forming ) , high optical performance resin lenses , light foam nitrocellulose car steering wheel . Compression molds mainly by the cavity , chamber , guide mechanism , introduced parts, heating systems and other components. Pressure injection molds are widely used in packaging aspects of electrical components . Pressure plastic mold manufacturing and injection molds used basically the same material . 3 , plastic extrusion dies
Used to produce a continuous shape forming a kind of mold plastic products , also known as extrusion head, is widely used in processing pipe, bar, single wire, sheet, film , wire and cable coating , profiles , etc. . Corresponding production equipment plastic extruder, the principle is solid plastic is melted at a screw rotation of heating and pressurizing conditions of the extruder , plasticized by the particular shape of the die made ​​of the same cross-sectional shape of the die and continuous plastic products. Manufacturing materials are carbon steel, alloy tool , and some in the extrusion die components will need to wear resistant materials such as diamond studded . Extrusion process is generally applicable only thermoplastic engineering plastics products manufacturing , with injection molds and compression molds have obvious differences in the structure. 4 , plastic blow mold for molding plastic containers are hollow products ( such as beverage bottles , cosmetic containers and other packaging ) in a mold , in the form of blow molding process according 2 inch pvc coupling mould  to the principles of the main extrusion blow molding , injection blow molding, injection stretch blow molding ( commonly known as " injection stretch blow" ) , multi-layer blow molding, sheet blow molding. Blow molding hollow articles is usually referred to as a device corresponding to the plastic blow molding machine , blow molding is only applicable to the production of a thermoplastic product varieties . Blow mold structure is relatively simple, the materials used are manufactured mostly of carbon and more . 5 , plastic is plastic mold plastic plates, sheets of material forming a mold plastic products, some of the more simple , the principle is the use of a vacuum pump or compressed air method bloom forming method of the fixed die or punch in on plastic plates, sheets, in the case of heating and softening deformation posted on the desired mold cavity molding products , mainly for some daily necessities , food , toys and packaging products production. Plastic mold due to low pressure molding , mold material so multi-use aluminum or non-metallic materials , the structure is relatively simple. 6 , high foam polystyrene mold is the application of polystyrene ( consisting of polystyrene beads and foaming material ) forming a mold of various materials to the desired shape foam packaging materials. The principle is in the mold can be made of polystyrene can be molded into steam , including simple hand-operated hydraulic straight- mold and mold are two types of foam , is mainly used to produce industrial goods packaging products. Such mold material with aluminum, stainless steel, bronze and the like.