Four-motor physical foaming co-extrusion device

A technology of co-extrusion physical foaming and extruding machine, applied in the field of physical foaming extruding device, can solve the problems of increasing the difficulty of processing and assembling the screw and barrel, affecting the plasticization and extrusion quality of plastics, and reducing the service life, etc. The effect of increasing screw transmission power and plasticizing capacity, improving overall efficiency and product quality, and improving efficiency and product stability

Inactive Publication Date: 2014-08-13
HANGZHOU LEROM WIRE & ELECTRIC APPLIANCE
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  • Abstract
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Problems solved by technology

However, if the length-to-diameter ratio is too large, the power consumed by the screw will increase accordingly, and the processing and assembly of the screw and barrel will increase; the possibility of screw bending will also increase, which will cause scraping between the ...

Method used

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  • Four-motor physical foaming co-extrusion device

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Embodiment Construction

[0015] Below in conjunction with accompanying drawing and specific embodiment the invention is described in further detail:

[0016] as attached figure 1 A four-machine co-extrusion physical foaming extrusion device shown includes a polyethylene foaming extruder motor 1, a polyethylene conveying extruder motor 2, an outer layer extruder motor 3, an inner layer extruder motor 4, a polyethylene extruder motor Foam extruder 5, polyethylene transfer extruder 6, outer layer extruder 7, inner layer extruder 8, extruder adapter 9 and three-layer co-extrusion head 10, the screw of the polyethylene foam extruder 5 directly 20mm, the length-to-diameter ratio is 36:1, and the compression ratio is 2:1. The screw diameter of the polyethylene conveying extruder 6 is 20mm, the length-to-diameter ratio is 36:1, and the compression ratio is 2.8:1. The diameter of the screw of the layer extruder 7 and the inner layer extruder 8 is 25 mm, the length-to-diameter ratio is 28:1, and the compressio...

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PUM

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Abstract

The invention relates to a physical foaming extrusion device and particularly relates to a four-motor physical foaming co-extrusion device. The four-motor physical foaming co-extrusion device comprises four motors, extrusion machines driven by the four motors, an extrusion machine joint and three layers of co-extrusion machine heads, wherein a polyethylene foaming extrusion machine, a polyethylene transferring extrusion machine, an outer-layer extrusion machine and an inner-layer extrusion machine can form a three-layer structure including an inner layer, a foaming layer and an outer layer once by a layer-separated extrusion technology, the three layers are mixed to form a whole body, the extrusion is insulated and uniform, and the OD (Outer Diameter) and the concentricity of extruded wires are stable.

Description

technical field [0001] The invention relates to a physical foaming extrusion device, in particular to a four-machine co-extrusion physical foaming extrusion device. Background technique [0002] At present, the traditional physical foaming technology mostly adopts the layered extrusion mode of inner layer, foamed layer, and outer layer. Such layered extrusion will make the insulation thickness difficult to control, and will lead to uneven insulation thickness, so that the wire extrusion 0D, concentricity, The degree of foaming etc. is not stable. Due to the high foaming degree of thin-skinned physical foaming products, to improve the stability of the foaming degree, it is necessary to increase the length-to-diameter ratio of the screw (the ratio of the length L of the working part of the screw to the diameter Ds of the screw is called the length-to-diameter ratio). The maximum length-to-diameter ratio of the 20mm screw is only 40, and according to theoretical calculations,...

Claims

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Application Information

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IPC IPC(8): B29C44/50
Inventor 袁永栋张军萍许利强石磊
Owner HANGZHOU LEROM WIRE & ELECTRIC APPLIANCE
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