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A method for preventing the shrinkage of the inner lining flanging tetrafluoro pipe on the flange end face

A technology of PTFE tube and flange surface, which is applied in the pipe industry and the field of flanging molds lined with PTFE tubes. It can solve the problems of shrinkage of PTFE area and easy cracking of PTFE, and achieve simple structure and low cost. The effect of low cost and easy operation

Active Publication Date: 2022-07-08
宁夏埃可美科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problem that the tetrafluoroethylene area of ​​the flange surface at the end of the pipe body shrinks and becomes smaller after the existing flanging mold flangs the tetrafluoroethylene lining of the steel pipe, and the problem that the tetrafluoroethylene is easy to crack at the flanging bend, the present invention discloses A mold for preventing shrinkage of the flanging PTFE area at the end of the lined PTFE tube was developed

Method used

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  • A method for preventing the shrinkage of the inner lining flanging tetrafluoro pipe on the flange end face
  • A method for preventing the shrinkage of the inner lining flanging tetrafluoro pipe on the flange end face
  • A method for preventing the shrinkage of the inner lining flanging tetrafluoro pipe on the flange end face

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Effect test

Embodiment 1

[0036] A lined tetrafluorotube flanging mold, the structure includes: a die head base plate 1, a cylindrical die head 2 arranged on the die head base plate 1, and a die head base plate 1 and the die head 2 are provided at the connection part. Groove 3, the groove 3 is a groove similar to a "U-shaped" structure, and the bottom surface and the side surface of the groove are transitioned by arc chamfering, and the arc angle is 97°. A chamfered surface 4 is provided at the connection of the cylindrical surfaces, the chamfered angle is 109°, and the surface finish of the mold is 0.8.

[0037] Specific implementation process:

[0038] A method for preventing shrinkage and shrinkage of an inner lining flanging tetrafluoro pipe on a flange end face, comprising the following steps:

[0039] a. Insert the PTFE pipe into the steel pipe, and reserve a certain length of PTFE pipe outside the flange surface of the steel pipe end;

[0040] b. Heating the PTFE tube with a certain length out...

Embodiment 2

[0044] As described in the first embodiment of a PTFE-lined flanging mold, the difference between the molds in this embodiment is that a push rod connecting plate 5 is provided on the face of the die head bottom plate 1 of the mold that is opposite to the die head 2, The die base plate 1 is arranged on the die base, and the die base includes a sleeve 6 sleeved outside the die base plate 1, and a sleeve cover plate 7 arranged at the bottom of the sleeve 6, passing through the sleeve cover plate 7 and connecting the plate with a push rod. 5. The push rod 8 connected with the bottom plate of the die head 1, the other end of the push rod 8 is set as a connecting rod 9, the connecting rod 9 is a screw screw, and the thrust support plate 10 is arranged at the root of the connecting rod 9, and the connecting rod 9 is connected with the cylinder .

[0045] The mold of this embodiment drives the push rod 8 to move through the cylinder, the push rod 8 drives the mold to move in the slee...

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Abstract

The invention discloses a flanging mold lined with tetrafluorotubes. The structure comprises: a die head base plate, a cylindrical die head arranged on the die head base plate, and a groove arranged on the die head base plate at the connection point with the die head. The beneficial effect of the present invention is that after the tetrafluoro pipe is flanged, a convex ring is formed on the flanged tetrafluoro pipe of the flange surface of the steel pipe end along the edge of the steel pipe mouth, and the convex ring blocks the direction of the tetrafluoroethylene of the end flange surface. The direction in the pipe body shrinks and moves, thus greatly reducing the shrinkage of the tetrafluoroethylene on the flange surface of the end; the groove of the mold in the present invention makes the tetrafluoro pipe form an arc transition at the flange, which can prevent the tetrafluoro pipe from flanging. The mold seat of the present invention makes the mold move in the sleeve, and the sleeve protects the mold. The operation method of the invention is simple and convenient, and the structure of the mold and the mold seat is simple.

Description

technical field [0001] The invention is used in the pipe-making industry, and relates to a flanging die for a lined tetrafluoro pipe, in particular to a die for preventing the mouth of the lined tetrafluoro pipe from shrinking and shrinking. Background technique [0002] In order to achieve the anti-corrosion effect of the pipeline, the steel pipe is usually lined with a tetrafluoro layer, and it is necessary to perform flanging treatment on the steel pipe or flange connection surface. The softened PTFE pipe is flanged on the flange surface of the pipe end through the mold. [0003] The patent titled "Flanging Mould for PTFE Pipe" (Announcement No.: CN203937181U) discloses a PTFE flanging mould, which is only used for flanging PTFE pipes and does not involve lining For the flanging of the pipe, the upper cylinder of the punch of the mold and the bottom plate of the mold are directly connected at right angles. [0004] The punch of the die is the same as the existing liner ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C57/00
CPCB29C57/00
Inventor 李亚鹏陈世鹏孙志强高海峰沈金彪张坤
Owner 宁夏埃可美科技有限公司