Polymer reducing material for gas pressure welding and gas pressure welding method

By using a combination of high-molecular materials, including a gas barrier ring and a reducing sheet, in gas pressure welding, the problems of oxidation coating and residue under conditions where the heat is less than that of acetylene gas are solved, achieving a pressure welding effect with sufficient strength and ensuring the stable bonding of materials such as steel bars.

CN115803139BActive Publication Date: 2026-06-23MURAYOSHI GAS PRESSURE WELDING IND CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
MURAYOSHI GAS PRESSURE WELDING IND CO LTD
Filing Date
2021-11-04
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

When using natural gas or propane gas, which have lower heat output than acetylene gas, existing gas pressure welding methods cannot prevent the formation of an oxide coating on the weld surface, resulting in poor bonding and insufficient strength of the welded part. Furthermore, residual metal rings affect the bonding effect.

Method used

Using high-molecular reducing materials including gas barrier rings and reducing sheets, and through the combination of thermosetting and thermoplastic resin materials, the formation of an oxide coating is prevented, and under high pressure, oxygen in the air combines with carbon to form carbon dioxide, inhibiting oxidation and residues, thus achieving pressure welding with sufficient strength.

Benefits of technology

Using a heat source less powerful than acetylene gas, standard flame heating effectively suppresses the oxidation coating and residues in the welded area, ensuring weld strength and the stability of the metal bond, and avoiding the generation of metal residues.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application provides a kind of polymer reducing material for gas pressure welding, when the gas pressure welding of reinforcing steel etc.is carried out, even in the case of using the propane gas that is inferior to the fire power of acetylene gas, it can be heated with standard flame from the initial heating stage in a way that sufficient fire power can be obtained, and the residue generation of pressure welding part is inhibited, while realizing the strength sufficient pressure welding.Polymer reducing material (A1) for gas pressure welding includes: cover body (1), thermoplastic resin material, and is the bottomed cylindrical body that can be externally embedded in the pressure welding side end of the material to be pressure welded, gas barrier ring (2), is integrally arranged in the bottom (12) of cover body (1), thermosetting resin material, and has the required diameter, and reducing sheet (3), thermoplastic resin material, sandwiching gas barrier ring (2) between the bottom (12) of cover body (1), the diameter is the same as or greater than gas barrier ring (2);Reducing ring (5) of polyimide resin material is wound on the outer peripheral portion of the laminated portion of reducing sheet (3).
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Citation Information

Patent Citations

  • Annular body for gas pressure welding

    JP2010089104A

  • Nozzle and gas pressure-welding method

    TW202530591A