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  • Two basic parts of injection molding mold

    Discussion in 'Plastic moulding' started by MIA WANG, Sep 9, 2021.

    1. MIA WANG

      MIA WANG Member

      Sep 2021
      Likes Received:
      The injection molding mold is used for the injection device and the mold clamping device to send the molten plastic into the mold. The function of the clamping device is:

      1. Make the injection molding mold close under the condition of withstanding the injection pressure;

      2. Take the product out of the injection device to melt the plastic before it is injected into the injection molding mold, and then control the pressure and speed to inject the melt into the injection molding mold.

      The injection device currently used has two designs: screw preplasticizer or two-stage device, and reciprocating screw.

      The screw pre-plasticizer uses a pre-plasticizing screw (first stage) and then injects molten plastic into the injection rod (second stage). The advantages of the screw preplasticizer are constant melt quality, high pressure and high speed, and precise injection volume control. These advantages are required for transparency, thin-walled products and high production rates. Its disadvantages include uneven residence time (causing material degradation), higher equipment costs and maintenance costs. The commonly used reciprocating screw injection device does not require a plunger to melt and inject the plastic into the injection molding mold.

      #Injectionmoldingchina #injectionmolds #Injectionmoldingparts

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