Injection molding machine for unsaturated polyester bulk molding compound

Abstract

The invention discloses an injection molding machine for an unsaturated polyester bulk molding compound and belongs to the technical field of mechanical device manufacture. The injection molding machine comprises a machine frame, an injection seat, a screw, a machine barrel, a feeding device and a heater. The screw is connected with a screw head, the screw head is connected with the front end of a thrust rod, the back portion of the front end of the thrust rod is provided with a section of protruding baffle ring portion, a non-return ring is sleeved on the thrust rod, and an axial gap of 2-15mm is arranged on the non-return ring between the ring portion of the thrust rod and the screw head. The back end of the non-return ring is provided with a protruding ring portion, and the front end of the non-return ring is provided with a barrel provided with a plurality of gaps. The protruding ring portion is provided with a bonding face bonded with the baffle ring portion of the thrust rod, and the bonding face of the non-return ring is provided with a plurality of feeding through holes communicated to the outside of a barrel wall in front of the protruding ring portion. The injection molding machine for the unsaturated polyester bulk molding compound can solve the problem that plastic products are large in backflow amount, unstable in weight and poor in density degree and cannot be molded into products with high surface quality in the injection molding process.

Description

technical field [0001] The invention relates to the technical field of mechanical equipment manufacturing, in particular to a plastic injection molding machine. Background technique [0002] The main raw material of unsaturated polyester bulk molding compound is a mass made of chopped glass fiber, unsaturated resin, filler and various additives after being fully mixed; the raw material has excellent electrical insulation properties, mechanical properties, heat resistance It is resistant to chemical corrosion and can adapt to various molding processes. It is widely used in the electronics industry and household appliances, automobile manufacturing and motor parts. Unsaturated polyester mass molding compound injection molding machine is specially used for injection molding of unsaturated polyester mass molding compound products. It is mainly composed of fuselage, injection parts, mold clamping parts, hydraulic system and control system, while the injection parts It is compose...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an unsaturated polyester mass molding compound injection molding machine, which can solve the problem of large plastic backflow and unstable product weight during the injection molding process of the unsaturated polyester mass molding compound injection molding machine. , it is difficult to form a stable injection pressure, the compactness of the molded products is lacking, and it is difficult to mold some products with high surface quality requirements

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