Spiral coil and plunger combined type injection molding device

Abstract

The invention relates to a spiral coil and plunger combined type injection molding device.The device comprises an injection oil cylinder, an injection seat frame, a motor, a transmission mechanism, a base, an angular-contact bearing, a hopper, a cylinder, an electric heater, a movable oil cylinder, a gear and a plunger.The device is characterized by further comprising a plasticized spiral coil, the plasticized spiral coil comprises a turnplate and a cylindrical body, three or more external circumference screw channels are formed in the cylindrical surface of the turnplate, three or more end face screw channels are formed in the right end face of the turnplate, and the right end of each external circumference screw channel is communicated with the corresponding end face screw channel; center holes are formed in the turnplate and the cylindrical body; the cylinder comprises a cylindrical plasticization chamber and an injection cylinder, the turnplate is located in the plasticization chamber and can rotate, the hopper is installed on the plasticization chamber, the left end of each external circumference screw channel is communicated with the hopper through a radial hole, and each end face screw channel is communicated with the right end of the corresponding external circumference screw channel and the left end of the injection cylinder; the plunger is in clearance fit with the injection cylinder.The device has the advantages that structure is simple and compact, a charging barrel is convenient to clean, plasticizing capacity, smashing capacity and extruding capacity are high, and the quality of products is high.

Description

technical field [0001] The invention relates to a combined screw disk and plunger injection molding device, which is mainly used for plasticizing and injection molding polymer materials, and belongs to the technical field of polymer material injection molding. Background technique [0002] Plastic injection molding has the advantages of simple process, high production efficiency, and accurate product size, and can mold products with complex shapes in a short period of time. [0003] The plasticizing injection device is one of the core structures of injection molding equipment. Its performance not only directly affects the efficiency of injection molding, production cost and production environment, but also has a decisive impact on the quality of injection products. [0004] There are two kinds of the most common plasticizing injection devices at present, one is the screw plunger type, and the other is the reciprocating screw type. [0005] The traditional screw plunger inje...

AI Technical Summary

Problems solved by technology

[0006] In the traditional reciprocating screw injection molding machine, the screw has two functions of plasticizing and injecting at the same time. The screw performs rotary motion to plasticize the material, and at the same time performs reciprocating axial motion to inject, so the complexity of the overall system is high. The cost is high, and during plasticization, along with the axial movement of the screw, the melt forms an insurmountable axial temperature difference

[0007] The traditional injection machine also has a common feature, that is, the screw is generally used to plasticize the material. Although the plasticization of the screw has its advantages, for some materials, the screw has the disadvantages of plasticizing, crushing and extrusion.

[0008] In view of the problems existing in traditional injection machines, although many researchers have explored, they are only limited to local changes to the screw or plunger, without changing the fundamental reason for the existence of the above-mentioned overall system

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