Method and equipment for forming high polymer bar by single screw extruder barrel

Abstract

The invention relates to a method and equipment for forming a high polymer bar by a single screw extruder barrel. The method sequentially comprises the following steps: a high polymer material is fed via a hopper base, and a screw rotates; the high polymer material moves forwards under the extrusion action of the screw; while being gradually compacted, the material enters a screw root circle reducing section; when the screw root circle disappears, a barrel cavity at the rear end is filled with the compacted high polymer material so as to form a high polymer bar blank; the obtained high polymer bar blank is gradually plasticized under the combined action of friction heat and external heat of the middle barrel; and then the high polymer bar blank is set in a setting machine barrel under the continuous action of extrusion pressure so as to finally realize continuous formation of the high polymer bar. The method and equipment have the following beneficial effects that: (1) the high polymer material with poor fluidity or even without fluidity can be used for continuously forming the bar by using a single screw; and (2) the formed high polymer bar can maintain the physical properties of the high polymer material.

Description

technical field [0001] The invention relates to a single-screw extruder cylinder molding method and molding equipment for polymer material rods with poor fluidity. Background technique [0002] At present, there are mainly two methods of forming polymer material rods: ordinary single (double) screw extruder combined with rod head and molding and sintering. [0003] The molding method for thermoplastics and polymer material rods with certain fluidity is generally formed by a single (twin) screw extruder combined with a rod head. This molding method is mature and has high molding efficiency and is widely used. For thermosetting plastics and polymer materials with poor molding fluidity, such as ultra-high molecular weight polyethylene (UHMWPE) rods, the molding method is adopted by molding and sintering. The molding process of this method is discontinuous, the plasticizing time is long, and the molding speed is 1- 2m / h, the production efficiency is low, and it is not suitable ...

AI Technical Summary

Problems solved by technology

For thermosetting plastics and polymer materials with poor molding fluidity, such as ultra-high molecular weight polyethylene (UHMWPE) rods, the molding method is adopted by molding and sintering. The molding process of this method is discontinuous, the plasticizing time is long, and the molding speed is 1- 2m / h, the production efficiency is low, it is not suitable for forming large and ultra-small finished products, and it is limited in production and application

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