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Flanging die for lining polytetrafluoroethylene pipe

A technology for flanging molds and tetrafluoro pipes, which is applied in the pipe making industry and the field of flanging molds lined with tetrafluoro pipes, can solve the problems of small shrinkage of the tetrafluoroethylene area and easy cracking of tetrafluoroethylene, and achieves simple structure and low cost. Low, easy-to-operate effect

Active Publication Date: 2020-05-12
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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  • Flanging die for lining polytetrafluoroethylene pipe
  • Flanging die for lining polytetrafluoroethylene pipe
  • Flanging die for lining polytetrafluoroethylene pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A flanging die lined with PTFE tubes, the structure includes: a die head base plate 1, a cylindrical die head 2 arranged on the die head base plate 1, a die head 2 is provided at the connection between the die head base plate 1 and the die head 2 Groove 3, the groove 3 is a groove similar to a "U-shaped" structure, the bottom surface of the groove and the side surface are transitioned by circular arc chamfering, and the arc angle is 97°, and the flange surface at the end of the cylinder and the A chamfered surface 4 is provided at the joint of the cylindrical surface, the chamfering angle is 109°, and the surface roughness of the mold is 0.8.

[0037] The specific implementation process:

[0038] A method for preventing the shrinkage of the lined flanging tetrafluoro tube at the end face of the flange comprises the following steps:

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

Embodiment 2

[0044] As described in Embodiment 1, the flanging mold of a lined PTFE tube, the difference of the mold in this embodiment is that: the die head bottom plate 1 of the mold is provided with a push rod connecting plate 5 on the surface opposite to the die head 2, The die bottom plate 1 is arranged on the mold base, and the mold 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 passes through the sleeve cover plate 7 and passes through the push rod connecting plate 5. The push rod 8 connected to the die bottom plate 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 supporting plate 10 is arranged at the root of the connecting rod 9, and the connecting rod 9 is connected to 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 sleeve 6, the ...

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PUM

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Abstract

The invention discloses a flanging die for a lining polytetrafluoroethylene pipe. The flanging die structurally comprises a die head bottom plate, a cylindrical die head arranged on the die head bottom plate and a groove formed in the part, connected with the die head, on the die head bottom plate. The flanging die has the advantages that after the polytetrafluoroethylene pipe is flanged, a protruding ring is formed on the part, along the flanged polytetrafluoroethylene pipe at the edge of a steel pipe opening, of a steel pipe end flange surface, the protruding ring prevents polytetrafluoroethylene on the end flange surface from contracting and moving towards the interior of a pipe body, and thus contraction of the polytetrafluoroethylene on the end flange surface is greatly reduced; circular arc transition is formed at the flanged part of the polytetrafluoroethylene pipe through the groove of the die, and cracking, at the flanged part, of the polytetrafluoroethylene pipe can be prevented; and by means of a die seat, the die is made to move in a sleeve, and the sleeve performs a protection effect on the die. The operation method of the flanging die is easy and convenient to implement, and the structures of the die and the die seat are simple.

Description

technical field [0001] The invention is used in the pipe-making industry, and relates to a flanging die for a lined tetrafluoro tube, in particular to a die for preventing the shrinkage of the mouth of the lined flanging tetrafluoro pipe. Background technique [0002] In order to achieve the anti-corrosion effect of the pipeline, the steel pipe is usually lined with a PTFE layer, and it is necessary to perform flanging treatment on the steel pipe or the flange connection surface. The flanging method is to heat the PTFE pipe to soften by heating the steel pipe, and then The softened PTFE tube is flanged on the flange surface of the pipe end through the mold. [0003] The patent titled "Fanging Mold for PTFE Tube" (Notice No.: CN203937181U) discloses a PTFE flanging mold, which is only used for flanging PTFE tubes and does not involve lining The flanging of the pipe, the upper cylinder of the punch of the mold and the bottom plate of the mold directly make a right-angle trans...

Claims

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Application Information

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Patent Type & Authority Applications(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