Rubber mold pressure injection molding: also known as casting molding. The plastic raw material is added into the preheated charging chamber, and then the pressure column is placed in the charging chamber to lock the rubber mold. The pressure is applied to the plastic through the pressure column. The plastic melts into a flowing state under high temperature and high pressure, and enters the type through the pouring system. The cavity gradually solidifies into a plastic part. This molding method is also called transfer molding. Pressure injection molding is suitable for plastics that are lower than solid plastics. In principle, plastics that can be compression molded can also be molded by pressure injection. But the molding material is required to have good fluidity in the molten state when it is lower than the curing temperature, and a higher curing rate when it is higher than the curing temperature.
Rubber mold die-casting mold: Die-casting mold is also called transfer molding mold. Plastic material is added to the preheated feed chamber, and then pressure is applied to the pressure column. The plastic melts under high temperature and pressure and enters the cavity through the mold pouring system. It is gradually hardened and molded. This molding method is called die casting molding. The mold used Called die-casting mold. This kind of mold is mostly used for molding thermosetting plastics.
Rubber mold injection molding: plastic is first added to the heating barrel of the injection machine, the plastic is heated and melted, and driven by the screw or plunger of the injection machine, enters the mold cavity through the nozzle and the mold pouring system, due to physical and chemical effects The hardened and shaped into injection products. Injection molding is composed of injection, holding pressure (cooling) and plastic parts demoulding process constitutes a cyclic cycle, so injection molding has periodic characteristics. Thermoplastic injection molding has a short molding cycle, high production efficiency, low wear of the melt on the mold, and can mass-produce plastic parts with complex shapes, clear surface patterns and marks, and high dimensional accuracy; but for plastics with large wall thickness changes Parts, it is difficult to avoid molding defects. The anisotropy of plastic parts is also one of the quality problems. All possible measures should be adopted to minimize them.
