Introduce three commonly used plastic molding processes

First, the thermosetting plastic press molding process First, the mold is installed on the press, and then heated to 17. At about °C, the press is started to remove the upper mold from the cavity, and the plastic is added to the mold cavity. The upper mold presses the plastic under the pressure and fills the various parts of the cavity. According to the size of plastic parts, stay in the pressure holding time, you can open the mold and take the parts.

Second, the thermosetting plastic injection mold injection process First, the plastic is added to the barrel preheating, stirring with a screw, so that the preheated plastic homogenization, the plastic under the effect of the screw rotation pressure, is transported to the front of the barrel and accumulate, plastic accumulation Reverse the thrust of the screw and retreat. The limit switch determines the retreat distance of the screw. The retraction distance is the amount of plastic. The injection piston behind the screw is turned on. The screw is advanced at a high speed and the plastic in the barrel is injected into the mold. The cavity, keeping the hardening time, can open the mold and take the parts.

Third, the thermoplastic injection mold injection process to add plastic into the high toe barrel, stirring with a screw, so that it reaches a flowing state, the screw in the rotation process, gradually back, while the plastic is accumulated forward, when the screw stops rotating The injection piston immediately injected plastic into the mold and opened the mold to take the well.