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Manufacturing method of polytetrafluoroethylene orifice-plate corrugated packing

A PTFE, orifice corrugated technology, applied in metal processing and other directions, can solve the problems of the appearance and size of corrugated parisons, the complex process of PTFE tape, and the easy generation of cracks. The effect of strength, small deformation, and not easy to crack

Inactive Publication Date: 2012-10-03
朱树烽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the existing polytetrafluoroethylene orifice corrugated packing is generally purchased from the polytetrafluoroethylene tape and then pressed. When the pressing pressure is not suitable, it is easy to produce cracks and the deformation is relatively large. The appearance and size of the corrugated parison are greatly affected, and the corrugation is easy to lose shape; in addition, the process of making PTFE strips is also relatively complicated, so the cost of the entire production process is relatively high

Method used

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  • Manufacturing method of polytetrafluoroethylene orifice-plate corrugated packing

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Embodiment 1

[0022] As the embodiment of the preparation method of polytetrafluoroethylene orifice corrugated packing of the present invention, as figure 1 and figure 2 shown, including the following steps:

[0023] (1) Press corrugated parison: inject powdery polytetrafluoroethylene raw material into the corrugated pressing mold, scrape it off with a knife when it is full, and then press it into a corrugated parison. The molding pressure is 20MPa. The pressure time is 5 minutes;

[0024] (2), parking: the corrugated parison that is pressed is taken out from the pressing mold, and placed in the natural environment for 15 hours;

[0025] (3), punching: putting the corrugated parison through step (2) into a punching die with the same corrugation, and punching;

[0026] (4) Sintering: put the punched corrugated parison into a sintering furnace for sintering, and divide it into a first heating stage and a second heating stage according to the heating rate of the sintering furnace, and the ...

Embodiment 2

[0032] As an embodiment of the manufacturing method of the polytetrafluoroethylene orifice corrugated filler of the present invention, the difference from Embodiment 1 is that the molding pressure is 30 MPa, and the holding time is 10 minutes; Take it out from the mold, and put it in the natural environment for 30 hours; the corrugation inclination of the corrugated parison is 45 degrees.

[0033] In this embodiment, the remaining steps and beneficial effects are consistent with those in Embodiment 1, and will not be repeated here.

Embodiment 3

[0035] As an embodiment of the manufacturing method of the polytetrafluoroethylene orifice corrugated filler of the present invention, the difference from Embodiment 1 is that the molding pressure is 25 MPa, and the dwell time is 8 minutes; Take it out from the mold and put it in the natural environment for 24 hours; the corrugation inclination of the corrugated parison is 40 degrees.

[0036] In this embodiment, the remaining steps and beneficial effects are consistent with those in Embodiment 1, and will not be repeated here.

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Abstract

The invention relates to a manufacturing method of polytetrafluoroethylene orifice-plate corrugated packing. The manufacturing method of the polytetrafluoroethylene orifice-plate corrugated packing comprises the following steps of pressing a corrugated blank, placing, punching, sintering and assembling. The invention provides the manufacturing method of the polytetrafluoroethylene orifice-plate corrugated packing, which has the advantages of simple process and high strength in the obtained packing.

Description

technical field [0001] The invention relates to a manufacturing method of corrugated polytetrafluoroethylene orifice packing. Background technique [0002] At present, the existing polytetrafluoroethylene orifice corrugated packing is generally purchased from the polytetrafluoroethylene tape and then pressed. When the pressing pressure is not suitable, it is easy to produce cracks and the deformation is relatively large. The appearance and size of the corrugated parison are greatly affected, and the corrugation is easy to lose shape; in addition, the process of making PTFE strips is also relatively complicated, so the cost of the entire manufacturing process is relatively high. Contents of the invention [0003] The invention provides a method for manufacturing corrugated polytetrafluoroethylene orifice packing with simple process and high strength. [0004] The present invention is achieved through the following technical solutions: [0005] The manufacturing method of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C43/02B26F1/02B29K27/18
Inventor 朱树烽
Owner 朱树烽
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