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Plastic Seals and Injection Molding Process
Release time:2013-08-21 Source:pengdan Reads:
As is know in the industry, plastic products are often made through injection molding machine. It is the main molding equipment for thermoplastic or thermosetting material the use of plastic products, plastic mold made of a variety of shapes. Divided into vertical, horizontal, all-electric. Heating the plastic injection function, the high voltage is applied to the molten plastic, it emitted filled mold cavity. The produced products there have belt hangers, plastic seals, and shoe hangers, sock hangers, size clips and so on. Injection molding machine works similar injections with the syringe, it is by means of a screw (or plunger) of thrust, the plasticizing good molten state vertical injection molding machine (Viscous flow) of plastic is injected into the closed good cavity formed by curing process to obtain products. Injection molding is a cyclical process, with each cycle including: the dosing - melt plasticizing - put pressure injection - filling cooling - Kai mold pickup. Remove the plastic parts again closed mold, the next cycle. Injections products like plastic seals, belt hangers and so on. If don’t control well, it is easily shirked. Usually a screw type injection molding machine the molding process is: the first granular or powdered plastics drum machine, and through the rotation of the screw and the outer wall of the barrel is heated so that the plastic to a molten state, and then the machine of mold clamping and injection seat forward, the nozzle securement mold gate Road, and then pass into the pressure oil to the injection cylinder, so that the screw forward, thereby to a high pressure and a faster speed will melt into a lower temperature within the closed mold, after a certain time (also known as the holding pressure), cooled and the pressure was maintained, the cured molding, can open mold to remove the article (holding pressure purpose is to prevent the regurgitation of the melt in the mold cavity, to replenish the material to the mold cavity, and ensure universal the horizontal injection mechanisms goods have a certain density and dimensional tolerances). Normally, we make the mold more clearly and molds make the enough size. That’s the plastic seals, and belt hangers and other plastic products the shrink and not smooth these situations will have a great improvement.

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