How are plastic molds classified?


Classification by Plastic Pallet Moulds (1) Injection m […]

Classification by Plastic Pallet Moulds
(1) Injection molding is to first add plastic into the heating barrel of the injection machine, the plastic is heated and melted, and driven by the screw or plunger of the injection machine, it enters the mold cavity through the nozzle and the mold gating system. Due to physical and chemical effects The hardening and shaping become injection molding products.
(2) Compression molding, commonly known as compression molding, is one of the earlier methods of molding plastic parts. Compression molding is to directly add plastic into an open mold cavity with a certain temperature, then close the mold, and melt the plastic into a flowing state under the action of heat and pressure. Due to physical and chemical effects, the plastic is hardened into a plastic part with a certain shape and size that remains unchanged at room temperature.
(3) Extrusion molding is to make the plastic in a viscous flow state pass through a die with a specific cross-sectional shape at high temperature and a certain pressure, and then shape it into a continuous profile of the desired cross-sectional shape at a lower temperature. A molding method.
(4) Plastic Injection Moulds is also called die casting. It is to add plastic raw materials into the preheated feeding chamber, then put the pressure column into the charging chamber to lock the mold, and apply pressure to the plastic through the pressure column. The plastic melts into a flowing state under high temperature and high pressure, and enters the cavity through the pouring system. It gradually solidifies into a plastic part.
(5) Blow molding is to fix the tubular or sheet-like blanks in the plasticized state made by extrusion or injection into the forming mold, and immediately introduce compressed air to force the blanks to expand and stick to the mold. A processing method for obtaining the desired hollow product on the cavity wall surface after cooling and shaping.
(6) Die-casting moulds Die-casting moulds are also called transfer moulding moulds. The plastic raw material is added to the preheated feeding chamber, and then pressure is applied to the pressure column. The plastic is melted under high temperature and high pressure, and enters the cavity through the pouring system of the mold, and gradually hardens and forms. This molding method is called die casting.
According to the different gating systems, plastic molds can be divided into three categories:
(1) Large nozzle mold: The runner and gate are on the parting line, and they are demolded together with the product when the mold is opened. The design is simple, easy to process, and the cost is low. Therefore, many people use the large nozzle system for operation.
(2) Small nozzle mold: The runner and gate are not on the parting line, and are generally directly on the product. Therefore, it is necessary to design more than one set of nozzle parting lines. The design is more complicated and the processing is more difficult. Generally, it should be selected according to the requirements of the product. Fine water system.
(3) Hot runner mold: The structure of this type of mold is basically the same as that of the fine nozzle, the difference is that the runner is located in one or more hot runner plates and hot nozzles with constant temperature, and there is no cold material demoulding, runner and gate. It is directly on the product, so the runner does not need to be demolded. This system is also called a no-sprue system, which can save raw materials. It is suitable for the situation where the raw materials are expensive and the product requirements are high, the design and processing are difficult, and the mold cost is.

PLASTIC new injection mold 22 lead pellet mould
Place of Origin:China
Brand Name:ISM MOULD
Shaping Mode:plastic injection mold
Product Material:Steel
Mold Cavity:Single/ Family