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PTFE hollow sphere machining method

A processing method and PTFE technology, applied in the direction of hollow objects, other household appliances, household appliances, etc., can solve the problems of inconvenient clamping and processing, inability to discharge, easy to shrink irregularly, etc., to achieve convenient clamping and processing, high yield rate. Effect

Active Publication Date: 2021-11-12
YUDU HAIRUI SEALING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In production practice, it is found that the butt joint of PTFE hollow balls is located on the diameter, which is not convenient for clamping and processing; and during the heating process, since the internal gas cannot be discharged, it is easy to shrink irregularly during the self-fusion process

Method used

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Embodiment Construction

[0018] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0019] A kind of PTFE hollow ball processing method, the steps are as follows:

[0020] Step 1. Form A curved spherical shell 1 through A forming mold, and B curved spherical shell 2 through B forming mold. Both A curved spherical shell 1 and B curved spherical shell 2 are provided with butt joint ears. The radian of shell 1 is smaller than that of a hemisphere, and the radian of B curved spherical shell 2 is larger than that of a hemisphere;

[0021] Step 2. Put A arc-shaped spherical shell 1 and B arc-shaped spherical shell 2 into an oven for sintering;

[0022] Step 3, punching holes 3 at the arc tops of A curved spherical shell 1 and B curved spherical shell 2 ...

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Abstract

The invention discloses a PTFE hollow sphere machining method. The method comprises the steps that an arc-shaped spherical shell A is formed through a forming mold A, an arc-shaped spherical shell B is formed through a forming mold B, each of the arc-shaped spherical shell A and the arc-shaped spherical shell B is provided with a butt joint lug, the radian of the arc-shaped spherical shell A is smaller than that of a hemisphere, and the radian of the arc-shaped spherical shell B is larger than that of the hemisphere; the arc-shaped spherical shell A and the arc-shaped spherical shell B are put into an oven to be sintered; the arc tops of the arc-shaped spherical shell A and the arc-shaped spherical shell B are punched after sintering; the butt joint lugs of the punched arc-shaped spherical shell A and the punched arc-shaped spherical shell B are in tight butt joint, then the arc-shaped spherical shell A and the arc-shaped spherical shell B are put into a mold cavity of a self-fusion mold and put into the oven to be continuously sintered, and after sintering is completed, cooling is conducted to obtain a PTFE hollow sphere semi-finished product; and the semi-finished PTFE hollow sphere is clamped into a clamping grabbing disc of a numerical control lathe, the butt joint lugs are turned to form a fusion convex ring, the outer surface of the PTFE hollow sphere becomes a perfect spherical surface, and the finished PTFE hollow sphere is obtained. Clamping and machining are facilitated, an exhaust opening is formed, and the yield is high.

Description

technical field [0001] The invention relates to the technical field of hollow sphere processing, in particular to a PTFE hollow sphere processing method. 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; Extruded to form hollow spheres. [0003] CN105965922A discloses a process for processing PTFE hollow spheres. First, two sets of hemispherical molds are made. Each set of hemispherical molds includes a hemispherical male mold and a hemispherical female mold. The PTFE raw materials are poured into the hemispherical molds for compression molding, and two sets of hemispherical molds are obtained. remove the hemispherical male mold, and then transfer the two PTFE hemispherical shells together with the hemispherical female mold into the oven. The two PTFE hemispherical Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C33/10B29C67/04B29C69/00B29L22/00
CPCB29C33/10B29C67/04B29C69/001B29L2022/002
Inventor 黄小华
Owner YUDU HAIRUI SEALING TECH CO LTD
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