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Processing technology for PTFE hollow sphere

A processing technology and PTFE technology, applied in the field of plastic processing, can solve the problems of complex molds and equipment, low precision of PTFE hollow balls, and inability to automatically take off, etc., and achieve the effect of high dimensional and shape accuracy.

Inactive Publication Date: 2016-09-28
YUDU HAIRUI SEALING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] PTFE hollow balls are widely used in sealing valves. Generally, PTFE hollow balls are molded by injection molding or extrusion molding. Injection molding needs to process hollow balls, and the mold and equipment are complicated; Extrusion molding forms a hollow ball. During the molding process, due to extrusion deformation, the finished product will stick to the mold and cannot be taken off automatically. It needs to be manually pried with a crowbar to remove the mold, and it needs to be pried once to produce a hollow ball. , adding extra labor intensity
Moreover, during the extrusion process, the shape of the inner hollow part of the PTFE hollow ball cannot be controlled, and it is difficult to maintain an accurate spherical shape, and the precision of the PTFE hollow ball product is not high

Method used

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  • Processing technology for PTFE hollow sphere
  • Processing technology for PTFE hollow sphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] First make as figure 1 Two sets of hemispherical molds are shown, each set of hemispherical molds includes a hemispherical male mold 2 and a hemispherical female mold 1, and PTFE raw materials are poured into the hemispherical molds for compression molding. The molding temperature is 260°C, and two PTFE hemispherical shell, remove the hemispherical male mold, and then install the two PTFE hemispherical shells together with the hemispherical female mold 1 figure 2 On the docking device, the docking device is installed in an oven, and the docking device includes a base 3, a linear guide rail 4 is installed on the base 3, two hemispherical female mold holders 6 are installed on the linear guide rail 4, two hemispherical The female mold holders 6 are all connected to the driving device 5, and the hemispherical female mold holders 6 are driven to move on the linear guide rail 4 through the driving device 5, and a docking pressure sensor is also provided. The two PTFE hemis...

Embodiment 2

[0018] First make as figure 1 Two sets of hemispherical molds are shown, each set of hemispherical molds includes a hemispherical male mold 2 and a hemispherical female mold 1, PTFE raw materials are poured into the hemispherical molds for compression molding, and the molding temperature is 330°C to obtain two PTFE hemispherical shell, remove the hemispherical male mold, and then install the two PTFE hemispherical shells together with the hemispherical female mold 1 figure 2 On the docking device, the docking device is installed in an oven, and the docking device includes a base 3, a linear guide rail 4 is installed on the base 3, two hemispherical female mold holders 6 are installed on the linear guide rail 4, two hemispherical The female mold holders 6 are all connected to the driving device 5, and the hemispherical female mold holders 6 are driven to move on the linear guide rail 4 through the driving device 5, and a docking pressure sensor is also provided. The two PTFE ...

Embodiment 3

[0020] First make as figure 1 Two sets of hemispherical molds are shown, each set of hemispherical molds includes a hemispherical male mold 2 and a hemispherical female mold 1, PTFE raw materials are poured into the hemispherical molds for compression molding, and the molding temperature is 290°C to obtain two PTFE hemispherical shell, remove the hemispherical male mold, and then install the two PTFE hemispherical shells together with the hemispherical female mold 1 figure 2 On the docking device, the docking device is installed in an oven, and the docking device includes a base 3, a linear guide rail 4 is installed on the base 3, two hemispherical female mold holders 6 are installed on the linear guide rail 4, two hemispherical The female mold holders 6 are all connected to the driving device 5, and the hemispherical female mold holders 6 are driven to move on the linear guide rail 4 through the driving device 5, and a docking pressure sensor is also provided. The two PTFE ...

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Abstract

The invention discloses a processing technology for a PTFE hollow sphere. The processing technology for the PTFE hollow sphere includes the following steps that two sets of hemispheric molds are manufactured, each set of hemispheric molds comprises a hemispheric male mold and a hemispheric female mold, PTFE raw materials are poured into the hemispheric molds to be subjected to compression molding, two PTFE hemispheric shells are obtained, and the hemispheric male molds are dismounted; then the two PTFE hemispheric shells and the hemispheric female molds are transferred into an oven together, the front faces of the two PTFE hemispheric shells are aligned, pressure is applied to the hemispheric female molds, and the PTFE hemispheric shells are in butt joint under the pressure condition to form a PTFE hollow sphere semi-finished product through heating; and after cooling, the hemispheric female molds are dismounted, the PTFE hollow sphere semi-finished product is machined in a digital controlled lathe, and thus the complete finished PTFE hollow sphere is formed. The precision of the interior size and the outline size of the PTFE hollow sphere processed through the processing technology is high.

Description

technical field [0001] The invention relates to a plastic hollow sphere processing technology, which belongs to the technical field of plastic processing. Background technique [0002] PTFE hollow balls are widely used in sealing valves. Generally, PTFE hollow balls are molded by injection molding or extrusion molding. Injection molding needs to process hollow balls, and the mold and equipment are complicated; Extrusion molding forms a hollow ball. During the molding process, due to extrusion deformation, the finished product will stick to the mold and cannot be taken off automatically. It needs to be manually pried with a crowbar to remove the mold, and it needs to be pried once to produce a hollow ball. , adding extra labor intensity. Moreover, during the extrusion process, the shape of the inner hollow part of the PTFE hollow ball cannot be controlled, and it is difficult to maintain an accurate spherical shape, and the precision of the PTFE hollow ball product is not hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D22/04B29C51/46B29C65/02B29K27/18B29L22/00
CPCB29D22/04B29C51/46B29C66/54B29K2027/18B29L2022/002
Inventor 黄小华
Owner YUDU HAIRUI SEALING TECH CO LTD
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