Improved coextruder for forming multi-layer composite plastic pipe

A technology of co-extrusion molding and multi-layer compounding, which is applied in the field of multi-layer composite plastic pipe co-extrusion molding devices, can solve the problems of narrow processing range, influence on extruder efficiency, material mixing and homogenization effect, and poor flow uniformity. Achieve the effect of no stagnant material dead angle, good production flexibility and versatility, and good material mixing and homogenization effect

Inactive Publication Date: 2002-03-06
无锡市江南橡塑机械有限公司
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Problems solved by technology

[0002] The multi-layer composite plastic pipe molding devices disclosed in Chinese patents 86108107, 97226308, and 98208800 are all composed of a co-extrusion feeding device, a feeder, and a forming die. This multi-layer composite co-extrusion molding device, each part and The combination adopts a fixed configuration, and a molding device of one specification can only adapt to the production of composite pipes with small changes in pipe diameter and wall thickness. Therefore, the processing range of the device is narrow and the production flexibility is poor.
Secondly, this type of forming device adopts the support-type material separation co-extrusion molding method,

Method used

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  • Improved coextruder for forming multi-layer composite plastic pipe
  • Improved coextruder for forming multi-layer composite plastic pipe

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Embodiment

[0015] Embodiment: Referring to the accompanying drawings, the three-layer composite plastic pipe co-extrusion molding device is composed of a combined co-extrusion feeding body 1, a basic die body 2, an adapter connector 3, and a die assembly 4. Four modules are combined, In order to ensure the concentricity and connection accuracy of each component combination, the connection of adjacent parts (parts) adopts concave-convex steps 5 and / or positioning pins / holes 6. In order to facilitate disassembly and assembly, each part (part) has a through ejector Bolt 7. The combined co-extrusion feed body 1 is composed of a feed block 1.1 and a feed block 1.2, wherein the feed block 1.1 has an outer layer feed port 1.3 and a middle layer feed port 1.4, and the feed block 1.2 has a The inner layer feed port is 1.5, and each feed port is connected to three extruders respectively. The axes of the three extruders are arranged at 45° adjacent to each other. There are through air intake holes...

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Abstract

An improved co-extruder for forming composite multi-layer plastic pipe features its modular structure, and is composed of feeder body consisting of several feeding modules, die body consisting of multiple screw distribution cores, die outlet assembly for different sizes, and connection adapter for connecting said die body with die outlet assembly. A layer thickness regulator is used for the distribution cores. Its advantages include multiple purposes, high homogenizing effect of materials, simple structure and high accuracy of layer thickness.

Description

technical field [0001] The invention relates to a multi-layer composite plastic pipe co-extrusion molding device, in particular to a three-layer composite plastic pipe co-extrusion molding device. Background technique [0002] The multi-layer composite plastic pipe molding devices disclosed in Chinese patents 86108107, 97226308, and 98208800 are all composed of a co-extrusion feeding device, a feeder, and a forming die. This multi-layer composite co-extrusion molding device, each part and The combination adopts a fixed configuration, and a molding device of one specification can only adapt to the production of composite pipes with small changes in pipe diameter and wall thickness. Therefore, the processing range of the device is narrow and the production flexibility is poor. Secondly, this type of forming device adopts the support-type material separation co-extrusion molding method, that is, the materials of each layer are separated through the support and then merged to fo...

Claims

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Application Information

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IPC IPC(8): B29C47/06B29C47/56B29C48/32
Inventor 陈金南万志平史亦斌钱志华
Owner 无锡市江南橡塑机械有限公司
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