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A kind of processing method of multi-layer thermoplastic pipe

A technology of thermoplastics and processing methods, applied in the direction of tubular articles, other household appliances, household appliances, etc., can solve the problems of complex molds, large diameter out of roundness, low processing efficiency of extruders, etc., to achieve uniform distribution and process. Simple and easy to control effects

Active Publication Date: 2016-04-13
上海天力实业(集团)有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a processing method for multi-layer thermoplastic pipes with low manufacturing difficulty, good stability, simple structure, low manufacturing cost, and improved product performance level, which solves the traditional problem of using a layer-by-layer The processing method of layer bonding, the performance of the hot melt adhesive layer directly affects the overall performance of the composite pipe, and the produced composite pipe has the risk of degumming and peeling during use, its diameter is large, its mold is complicated, and the extruder Low processing efficiency and complicated process control

Method used

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Embodiment 1

[0028] The present invention is a kind of processing method of multi-layer thermoplastic pipe, and this processing method can produce such as figure 1 The multilayer thermoplastic pipe 1 is shown. like figure 2 As shown, the whole process of the processing method includes the following steps:

[0029] 1) Feed the raw materials into the hopper of the traditional main extruder 5 and at least one auxiliary extruder 4, respectively add the color masterbatch and / or functional additives into the extruder hopper using the proportional mixing feeding mechanism In the oral cavity, it is evenly mixed with the raw materials.

[0030] 2) The traditional main extruder 5 and at least one auxiliary extruder 4 respectively extrude the molten state of the same material or similar materials welded together with various color masterbatches and / or functional additives evenly distributed Thermoplastic mass. Various color masterbatches and / or functional additives are required to be uniformly a...

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Abstract

The invention discloses a processing method of a multi-layer thermoplasticity plastic pipe. The processing method is characterized in that at least two layers of thermoplasticity plastic layer co-extrusion mutual melting technologies are adopted, a main extruding machine and at least one auxiliary extruding machine are utilized to extrude the plastic, the plastic is extruded into a pipe billet in a multi-layer co-extrusion mould, a plastic pipe rounding stress relief device is used for cutting the diameter rounding and axial stress after vacuum sizing, and the plastic is further cooled and formed. The processing method provided by the invention has the characteristics that the manufacture difficulty is low, the stability is good, the structure is simple, the manufacturing cost is low, the property grade of a product is improved and the like.

Description

technical field [0001] The invention relates to a processing method for a multilayer thermoplastic pipe, belonging to the technical field of thermoplastic pipe processing. Background technique [0002] The traditional multi-layer thermoplastic pipe adopts the processing method of bonding different materials layer by layer with hot melt adhesive. It is a kind of composite pipe. For melt adhesive bonding, the performance of the adhesive layer is affected by the properties of the inner and outer layer materials, and there is a risk of degumming and peeling during use. [0003] The processing method of hot-melt adhesive bonding, because the hot-melt adhesive layer is required to be very thin, the control of the hot-melt adhesive layer is more complicated, and the performance of the hot-melt adhesive layer directly affects the overall performance of the composite pipe. [0004] The processing method of layer-by-layer bonding is adopted. Each layer of plastic material is differen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C47/06B29C47/56B29C47/20B29C47/08B29L23/00B29C48/32
CPCB29C48/09B29C48/21B29C48/267B29C48/30B29C48/32B29C48/49B29L2009/00B29L2023/22
Inventor 郑巍郑宇朱利平阮成福罗建平
Owner 上海天力实业(集团)有限公司
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