Plastic injection moulding machine and injection screw thereof

Abstract

The invention provides a plastic injection moulding machine and an injection screw thereof. The injection screw comprises a thread part and a mixing member which are connected mutually, an external thread is arranged on the thread part, and the thread part is sequentially provided with a feeding segment, a compression segment and a wave homogenizing segment in the spiral direction of the externalthread; and at least six waves are arranged on the wave homogenizing segment, each wave is composed of a first wave segment and a second wave segment with a 180-degree phase difference, and the firstwave segments and / or the second wave segments are arranged eccentrically and are composed of wave troughs and wave crests which are uniformly distributed along the circumference of the screw. Throughthe improvement of the structure, the problem of plastic uniformity of the injection screw in the plasticating process is achieved, the plastic performance can further be protected, so that the effectthat the injection screw realizes performance complementation in four aspects of plasticizing quality, rapidness and high efficiency, universality and energy consumption is achieved; and meanwhile, the injection screw can further be widely applied to universal type various reciprocating type screw plastic injection moulding machines, and various shear sensitivity high molecular materials or highmolecular materials and inorganic fillers are machined.

Description

technical field [0001] The invention relates to a plastic injection molding machine and its injection screw. Background technique [0002] Polymer material machinery is the mechanical equipment for polymer material molding. It belongs to advanced rapid prototyping equipment. The working characteristic is long-term continuous operation. The stability, fast and efficient molding of injection molding machines in each cycle is the performance that every equipment company and production company pays great attention to. , the core component is the screw, whose performance is directly related to the quality and efficiency of the product. Although the traditional reciprocating screw has a variety of structural forms, it is mainly considered from the aspects of plasticizing quality, rapidity, high efficiency, and versatility. There are not many methods of quality, speed, efficiency, and versatility, and it is difficult to balance the two. When processing polymer materials + inorganic...

AI Technical Summary

Problems solved by technology

[0002] Polymer material machinery is the mechanical equipment for polymer material molding. It belongs to advanced rapid prototyping equipment. The working characteristic is long-term continuous operation. The stability, fast and efficient molding of injection molding machines in each cycle is the performance that every equipment company and production company pays great attention to. , the core component is the screw, whose performance is directly related to the quality and efficiency of the product. Although the traditional reciprocating screw has a variety of structural forms, it is mainly considered from the aspects of plasticizing quality, rapidity, high efficiency, and versatility. There are not many methods of quality, speed, efficiency, and versatility, and it is difficult to balance the two. When processing polymer materials + inorganic fillers, such as lengthening glass fibers, it is more difficult for traditional screws to ensure the uniformity of glass fiber length and plasticizing quality. The issue of energy consumption also needs to be considered. These four have multiple technical contradictions, so improving the relationship between these four is a problem we need to solve

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