注塑机机械结构（Mechanical structure of injection molding machine）.docVIP

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注塑机机械结构（Mechanical structure of injection molding machine）.doc

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注塑机机械结构（Mechanical structure of injection molding machine）

注塑机机械结构（Mechanical structure of injection molding machine） Mechanical structure of injection molding machine 2005-10-16 14:46:28 China injection molding net The injection machine is mainly divided into injection part and die locked part on the mechanical structure. The function of the injection part is to melt the plastic and inject it into the mold cavity, and the function of the die locking part is to control the mold opening and closing, pushing out the products and so on. 1, injection part There are two main parts of injection: piston and reciprocating screw type. Piston injection molding machines are very rare nowadays, but they are not introduced here. Reciprocating screw injection molding machine through the screw in the heating cylinder rotation, the solid plastic particles (or powder) melted and mixed into the front barrel cavity, and then screw moving along the axial direction, the plastic melt in the cavity of injection mold cavity. Plastic, plastic in the screw edge, compacted in the groove, and accept the barrel wall heat transfer, with plastic and plastic, plastic and barrel and screw surface friction heat, the temperature gradually increases to the melting temperature. The melted plastic is further stirred by the mixing of the screw cage and enters the front part of the barrel along the spiral slot and pushes the screw back. Injection part and plasticizing related parts are: screw, cylinder, split shuttle, backstop ring, nozzle, flange, feed bucket, etc.. The following are described in terms of their role and influence in the plasticization process. Screw is an important part of injection molding machine. Its function is to transport, compact, melt, stir and press the plastic. All this is done by rotating the screw in the barrel. When the screw rotates, the plastic will cause friction and movement between the inner wall of the cylinder, the bottom of the screw, the bottom of the screw, the advancing surface of the screw and the plastic and plastic. Th