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Plastic extruder

A technology of plastic extruder and extrusion port, which is applied in the field of plastic extruder, can solve the problems of large radial temperature gradient and low shear rate of molten material, etc., so as to prolong the service life, reduce production cost, good corrosion resistance and The effect of high temperature resistance

Inactive Publication Date: 2017-11-07
合肥英源新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a plastic extruder to solve the problems of low shear rate and large radial temperature gradient of the molten material in the existing plastic extruder

Method used

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Embodiment 1

[0027] Such as Figure 1 to Figure 2 As shown, the present invention provides a plastic extruder, comprising: a base 1, a barrel 2 arranged on the base 1, a feed port 3 arranged at the top of one end of the barrel 2, an extruder arranged at the other end of the barrel 2 An outlet 4, a screw 5 arranged inside the barrel 2, a motor 6 arranged on one side of the barrel 2 and connected to the screw 5. The material enters the barrel 2 from the feed port 3, and the motor 6 drives the screw 5 to rotate, so that the material is extruded from the extrusion port 4.

[0028] The screw 5 is a cone-shaped screw, and includes a feed section 51 , a plasticizing section 52 , a compression section 53 , an exhaust section 54 , an extrusion section 55 and a hooked screw head 56 in the direction from the motor 6 to the extrusion port 4 . The outer taper angle of the screw rod 5 is 2.46 degrees. The extrusion section 55 is of equal pitch structure, and the pitch is continuously and gradually inc...

Embodiment 2

[0030] A method for processing the screw of a plastic extruder, the steps are as follows:

[0031] ①, screw milling

[0032] 38CrMoA1 round bar is used, the blank is 150mm×1530mm, and it is processed by rough turning, semi-finishing turning, rough grinding, threading, milling back groove, turning thread groove, tempering, polishing, and fine grinding;

[0033] The screw is a cone-shaped screw, and the outer cone angle of the screw is 2.46 degrees; it includes the feeding section, the plasticizing section, the compression section, the exhaust section, the extrusion section and the hook-shaped screw head; The extrusion direction is a continuous gradual increase structure; the feeding section, plasticizing section, compression section, and exhaust section are of equal differential variable diameter and pitch structure;

[0034] ②, protective layer spraying

[0035] Spray the protective layer on the milled screw, and process it by electrostatic spraying. After the processing is ...

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Abstract

The invention provides a plastic extruder, and relates to the technical field of plastic extrusion devices. The plastic extruder comprises a base, a charging barrel arranged on the base, a feeding port formed in the top of one end of the charging barrel, an extrusion port formed in the other end of the charging barrel, a screw arranged in the charging barrel, and a motor arranged on one side of the charging barrel and connected with the screw, wherein the screw is a taper angle-shaped screw, and sequentially comprises a feeding section, a plasticizing section, a compression section, an exhaust section, an extrusion section and a hook-shaped screw head from the motor to the extrusion port. The hook-shaped screw head forms a material channel from the surface of the screw to the core part of the screw, the shearing rate of molten material at the section is increased, and therefore the radial temperature gradient is reduced, the phenomenon that the material is retained and decomposed at the section is obviously relieved, and the mixing efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of plastic extrusion devices, in particular to a plastic extruder. Background technique [0002] In a plastic extruder, the screw is an important part. The screw head of the current plastic extruder screw is mostly a simple rotary shape, and its rotary generatrix does not change. When the material passes through the screw head, no matter how the screw head rotates, the material fluid moves along the generatrix of the screw head. At this time , the shear rate of the molten material will decrease, and the radial temperature gradient will increase. At this stage, the residence time of the material is long, which easily leads to the occurrence of material decomposition. Therefore, it is necessary to provide a plastic extruder to solve the above problems. [0003] At the same time, the existing screw material is mainly 38CrMoA1 round bar material, which is made through conventional mechanical processing. The sc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/62B23P15/00
CPCB23P15/00B29C48/65
Inventor 邬家银
Owner 合肥英源新材料科技有限公司
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