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Method for manufacturing composite hose

A manufacturing method and composite hose technology, which is applied in the hose field, can solve problems such as internal stress at the bonding point, large difference in pipe diameter, and influence on bonding strength, so as to achieve the effect of reliable bonding and avoiding damage

Active Publication Date: 2012-05-09
JINHUA CHUNGUANG TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although this technical solution provides a feasible technological approach for interpenetrating the small-diameter pipes in the large-diameter pipes to make them bond to each other, it has the following disadvantages: 1) It is necessary to compress the large-diameter pipes so that they are deformed and contact the small-diameter pipes, so The outer tube is easily damaged, especially when the diameter difference between the inner and outer tubes is large; 2) The inner and outer tubes are bonded when the large-diameter tube is under pressure and deformation. When the external pressure is released, the adhesive There is internal stress at the joint, which affects the bonding strength

Method used

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  • Method for manufacturing composite hose
  • Method for manufacturing composite hose
  • Method for manufacturing composite hose

Examples

Experimental program
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Effect test

Embodiment 1

[0021] The composite hose finished product of this embodiment is as figure 1 As shown, the small-diameter tube 4 is adhered to the inner wall of the large-diameter tube 1 by glue 2 .

[0022] The manufacturing process of the composite hose is as follows:

[0023] first step see figure 2 ——Insert the small-diameter tube 4 coated with a strip of viscose 2 (cold glue or hot-melt glue) in the length direction of the outer surface, the silicone inflation hose 5 and the support mandrel 6 with grooves into the large-diameter tube 1 successively; the support core The section of the rod 6 is C-shaped, and the outer diameter matches the inner diameter of the large-diameter pipe 1, so the shape of the large-diameter pipe 1 can be maintained. The inflatable hose 5 is located at the bottom of the groove, the small-diameter tube 3 is located at the upper part of the groove, and the tube is lined with a support mandrel 3, and the outer surface coated with glue 2 is adjacent to the inner s...

Embodiment 2

[0028] The composite hose of this embodiment is manufactured according to special needs, and the finished product structure is also as figure 1 As shown, the manufacturing process is:

[0029] 1) The small-diameter tube 4 is integrated with the special hot-melt adhesive 2 and the heating wire 8 by co-extrusion (see Image 6 );

[0030] 2) The large-diameter tube 1 is positioned in the support frame 7 , and the outer surface of the large-diameter tube 1 that is coated with adhesive on the corresponding small-diameter tube 4 abuts against the support frame 7 . The support frame of this embodiment is formed by combining two halves with a semicircular concave cross section (obviously, other structural forms with a "concave" cross section are also possible).

[0031] 3) When the large-diameter pipe 1 is positioned by means of the support frame 7 , the outer surface of the large-diameter pipe corresponding to the small-diameter pipe 4 coated with the outer surface of the glue 2 le...

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Abstract

The invention relates to a method for manufacturing a composite hose and belongs to the technical field of hoses. The method comprises: firstly, inserting a small-caliber pipe coated with adhesive, a inflating hose and a supporting core rod with a groove into a large-caliber pipe, wherein the inflating hose is positioned at the bottom of the groove, the small-caliber pipe is positioned on the upper part of the groove, a supporting core shaft is lined in the small-caliber pipe, and the outside surface coated with the adhesive of the small-caliber pipe is close to the inside surface of the large-caliber pipe; secondly, inflating air into the inflating hose to allow the inflating hose to expand to prop up the small-caliber pipe till the outside surface coated with the adhesive of the small-caliber pipe contacts the inside surface of the large-caliber pipe; and thirdly, after the adhesive is cured and the small-caliber pipe is adhered on the inside surface of the large-caliber pipe, relieving air pressure and withdrawing the supporting core rod, the inflating hose and the supporting core shaft. The method and completely prevent the large-caliber pipe and the small-caliber pipe from being damaged in the technical process, avoids deformation stress at the joint part and ensures high adhesion strength.

Description

technical field [0001] The invention relates to a method for manufacturing a composite hose, in particular to a method for manufacturing a hose in which a small-diameter tube is adhered to the inner wall of a large-diameter tube, and belongs to the technical field of hoses. Background technique [0002] For a long time, it has been one of the difficult processes in the hose manufacturing industry to insert small-diameter tubes into large-diameter tubes and make them firmly bonded to each other. The search finds that the international patent application with the application number WO98 / 21024 and the European patent EP1011960 disclose a technical solution to the above-mentioned process. In the large-diameter tube, the large-diameter tube is then pressed to bring its inner surface into contact with the outer surface of the small-diameter tube coated with hot-melt adhesive, so that the small-diameter tube is adhered to the inner surface of the large-diameter tube. [0003] Alth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J5/06F16L11/22
Inventor 陈正明
Owner JINHUA CHUNGUANG TECHNOLOGY CO LTD
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