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Polytetrafluoroethylene bellows component and preparation method thereof

A teflon, bellows assembly technology, applied in the direction of pipes/pipe joints/pipes, hoses, pipes, etc., can solve the problems of poor bending performance, heavy weight, limited application of non-bending performance, etc. Excellent bending performance and light weight effect

Active Publication Date: 2010-06-02
SHANGHAI PLASTICS RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the metal pipe assembly has the characteristics of high and low temperature resistance, its disadvantages of poor corrosion resistance, heavy weight, and no bending performance make its application limited. Similarly, PTFE hose assemblies have the disadvantages of heavy weight and poor bending performance

Method used

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  • Polytetrafluoroethylene bellows component and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The PTFE straight blank pipe with an inner diameter of φ8mm is formed according to the PTFE straight blank tube, the end of the PTFE corrugated pipe is restored, cut and installed, and the specific steps are as follows:

[0029] (1) PTFE straight tube forming

[0030] ① Heat the mandrel to 280°C.

[0031] ② Put the PTFE straight tube into the corresponding mandrel.

[0032] ③Start the forward button of the forming equipment, so that the straight polytetrachlorethylene tube and the mandrel rotate together, enter into the mandrel obtained in step 1), and twist together to form a spiral shape.

[0033] ④ When the mandrel with the blank tube rotates in the mandrel to the end of the mandrel, press the stop key.

[0034] ⑤Press and hold the end of the PTFE straight billet tube, press the back button to prevent it from rotating with the mandrel, and press the stop key when the mandrel retreats to the head of the formed spiral pipe.

[0035] ⑥Repeat steps ③, ④, ⑤ until the w...

Embodiment 2

[0047] The PTFE straight blank pipe with an inner diameter of φ9mm is formed according to the PTFE straight blank tube, the end of the PTFE corrugated pipe is restored, sleeved and installed. The specific steps are as follows:

[0048] (1) PTFE straight tube forming

[0049] ① Heat the mandrel to 280°C.

[0050] ② Put the PTFE straight tube into the corresponding mandrel.

[0051] ③Start the forward button of the forming equipment, so that the straight polytetrachlorethylene tube and the mandrel rotate together, enter into the mandrel obtained in step 1), and twist together to form a spiral shape.

[0052] ④ When the mandrel with the blank tube rotates in the mandrel to the end of the mandrel, press the stop key.

[0053] ⑤Press and hold the end of the PTFE straight billet tube, press the back button to prevent it from rotating with the mandrel, and press the stop button when the mandrel retreats to the head of the formed spiral tube.

[0054] ⑥Repeat steps ③, ④, ⑤ until th...

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PUM

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Abstract

The invention relates to a polytetrafluoroethylene bellows component and a preparation method thereof. The component consists of a metal connector, a lining and a spiral pipe, and is characterized in that two ends of the spiral pipe are straight pipes; the rest of the spiral pipe is bellows with sine-shaped outer wall; the lining is inserted into the straight pipes at two ends of the spiral pipe; and the metal connector is inserted into the lining. The preparation method comprises: preparing a polytetrafluoroethylene straight blank pipe by pushing, pressing and sintering polytetrafluoroethylene resin; and preparing the component by performing molding, end recovery, suit cutting and head installation on the polytetrafluoroethylene straight blank pipe. The polytetrafluoroethylene bellows component prepared by the method has the characteristics of high / low-temperature resistance, corrosion resistance, aging resistance, light weight, excellent bending-interference performance and the like, and is an ideal protective sleeve for protecting wires or cables used for aerospace / aviation aircraft.

Description

technical field [0001] The invention relates to a polytetrafluoroethylene bellows component and a preparation method thereof. Background technique [0002] At present, metal pipe assemblies and polytetrafluoroethylene hose assemblies are mostly used to protect wires and cables of aerospace and aircraft vehicles. As a component for aerospace and aviation vehicles, it should have the following concentrated features: high and low temperature resistance, corrosion resistance, aging resistance, light weight and excellent bending performance. Although the metal pipe assembly has the characteristics of high and low temperature resistance, its disadvantages of poor corrosion resistance, heavy weight, and no bending performance make its application limited. Similarly, PTFE hose assemblies have the disadvantages of heavy weight and poor bending performance. Contents of the invention [0003] The object of the present invention is to provide a polytetrafluoroethylene corrugated pipe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L11/11
Inventor 邵漫江高明铭陆浩初
Owner SHANGHAI PLASTICS RES INST CO LTD
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