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Cycle and chemical action of rare earth magnets mold

Apr 24, 2019

The rare earth magnets mold needs to be added into the heating barrel of the injection machine when the operation is performed. The plastic is melted by heat and pushed into the mold cavity through the nozzle and the mold casting system under the push of the injection machine screw or the plunger. And chemically hardened and shaped into injection molded products. Injection molding consists of a cycle consisting of injection, pressure holding (cooling) and plastic part demolding, so that injection molding has periodic characteristics.

 

The rare earth magnets mold thermoplastic injection molding has a short molding cycle and high production efficiency. During the running process, the melt has little wear on the mold, and can form large-sized plastic parts with complicated shapes, clear surface patterns and high mark precision. However, for plastic parts with large wall thickness variations, it is difficult to avoid molding defects. Plastic anisotropy is also one of the quality issues and should be minimized by taking all possible measures.

 

The compression molding of the rare earth magnets mold is to directly add the plastic into the open mold cavity having a certain temperature, and then close the mold, and the plastic melts 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 having a constant shape and constant shape and size. Compression molding is mainly used for molding thermosetting plastics, such as phenolic molding powder, urea-formaldehyde and melamine formaldehyde molding powder, glass fiber reinforced phenolic plastic, epoxy resin, DAP resin, silicone resin, polyimide, etc. It is also possible to mold and process unsaturated polyester dough (DMC), sheet molding compound (SMC), pre-formed molding compound (BMC), and the like.www.yxhgmould.com