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

A polymer material, single-screw extrusion technology, applied in the field of polymer material rod single-screw extrusion barrel molding method and its molding equipment, can solve the problem of discontinuous molding process, unsuitable for molding large and extra small finished products, Problems such as production and application restrictions, to achieve the effect of maintaining physical properties

Inactive Publication Date: 2012-01-04
WUHAN INSTITUTE OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings, but it will not constitute a limitation to the present invention.

[0025] The molding equipment of the present invention mainly includes: screw rod 1, hopper seat 2, pressurized lining 3, front end barrel 4, middle barrel 5, heater 6, rear end barrel 7, shaping barrel 8 and cooling water tank 9, The machine barrel of the present invention is made up of front-end machine barrel 4, middle machine barrel 5, back-end machine barrel 7 and shaping machine barrel 8, is connected to each other by flange between them, the outside of middle machine barrel 5 and rear-end machine barrel 7 respectively A heater is installed, wherein the front-end barrel 4 is connected to the hopper seat 2 through a flange, and the screw 1 is connected to the output shaft of the reducer, and rotates during work;

[0026] The screw 5 includes a feed compression section 9, a solid plug section 10 and a...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/20B29C47/60B29C47/66B29C47/82B29C48/32
CPCB29C47/385B29C48/397
Inventor 秦建华
Owner WUHAN INSTITUTE OF TECHNOLOGY
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