A short screw extruder

A screw extruder and screw technology, which is applied in the field of short screw extruders, can solve the problems of shortened delivery cycle and insufficient extruder power, and achieve the effect of low replacement and maintenance costs and shortened length

Active Publication Date: 2018-08-17
临沂市天泽沅生态木有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] If the existing screw extruder wants to obtain good quality injection molding products, the screw must be long enough so that it has enough mixing length to fully melt the thermoplastic resin material. Therefore, the extruder tends to be larger
In recent years, the delivery cycle of products has been shortened, and the plasticizing speed of the screw is required to be faster and faster, and many extruders have become unable to do what they want.

Method used

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  • A short screw extruder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] As shown in the figure, a short-screw extruder includes a barrel 1, a screw 2, and an injection shaft 3. The injection shaft 3 is connected to a driving device 4. The screw 2 is rotated in the barrel 1. The screw 2 includes a central through hole. The screw body has a left support part 2.3 and a right support part 2.4, and the outer cylinder of the screw rod 2 is provided with an outer screw edge 2.1 between the left support part 2.3 and the right support part 2.4, and is supported from the right in the center hole The corresponding inner hole position of the part 2.4 is provided with an inner screw edge 2.2, and the injection shaft 3 fits in the inner screw edge 2.2; a rolling bearing 8 is matched between the injection axis 3 and the inner hole corresponding position of the right support part 2.4 , to reduce the friction of the injection shaft moving forward or backward;

[0031] As shown in the figure, the helical directions of the outer flight 2.1 and the inner fligh...

Embodiment 2

[0041] The screw body of the screw 2 only includes the left support part 2.3, and the left bearing seat 9 of the left support part 2.3 is two bearing seats separated by a certain distance, or a bearing seat with sufficient rotation support length, the screw rod of the screw rod 2 The screw body is rotatably supported on the left support part 2.3; the right end of the screw body is a free end, which extends into the barrel 1 at a distance H from the right baffle plate 19. This spacing distance H is configured as a communication passage instead of the communication hole 6 . The screw body is provided with an external screw edge 2.1 between the left support part 2.3 and the right end of the screw body.

[0042]The granular thermoplastic resin material is fed from the hopper 5, and the material is gradually squeezed forward by the action of the outer screw edge 2.1 to the right end of the screw body until the material in the outer screw conveying section A is introduced into the i...

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Abstract

A short screw extruder comprises a cylinder (1), a screw (2), and an injection shaft (3). The screw (2) comprises a screw body provided with a central through hole. The screw body comprises a left support part (2.3) and a right support part (2.4). An external screw edge (2.1) of the screw body is arranged between the left support part and the right support part. An internal screw edge (2.2) is arranged in the central hole of the screw body from a position corresponding to the right support part (2.4) in the hole. One section of the left support part (2.3) and one section of the right support part (2.4) are rotatingly matched in the cylinder (1). The injection shaft (3) is arranged in the internal screw edge (2.2). The spiral directions of the external screw edge (2.1) and the internal screw edge (2.2) are opposite. Because the external spiral channel is folded relative to the internal spiral channel, the length of screw is reduced, and thus the extruder is minimized.

Description

technical field [0001] The invention relates to the technical field of extruders, in particular to a short screw extruder. Background technique [0002] Screw extruder is an important equipment for plastic processing, and the screw is its core component. The length of the screw determines the length of the extruder. In the extruder, the barrel / screw has three functions: one is the feeding and conveying function, that is, the feeding section; the other is the plasticizing function, which melts the pellets into a plastic melt, that is, the plasticizing section; the third is stable extrusion The extrusion section must have a melt metering effect. [0003] If the existing screw extruder wants to obtain good-quality injection molding products, the screw must be long enough so that it has enough mixing length to fully melt the thermoplastic resin material. Therefore, the extruder tends to be larger. In recent years, the delivery cycle of products has been shortened, and the plas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C47/38B29C47/84B29C48/395
CPCB29C48/397B29C48/82B29C48/845
Inventor 高飞成岗张晓勇张文明
Owner 临沂市天泽沅生态木有限公司
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