Preparation method for metal-based polytetrafluoroethylene bearing

A technology based on polytetrafluoroethylene and polytetrafluoroethylene film, which is applied in the field of preparation of metal-based polytetrafluoroethylene bearings, can solve the problem that the long-term use temperature cannot be higher than 120°C, and achieve low one-time investment costs and stripping The effect of increased strength and simple equipment
CN102338162AInactive Publication Date: 2012-02-01SHANGHAI PLASTICS RES INST CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI PLASTICS RES INST CO LTD
Publication Date
2012-02-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a preparation method for a metal-based polytetrafluoroethylene bearing. The method comprises the following steps of: (1) machining a metal blank; (2) performing sand blasting; (3) spray-coating a meltable fluororesin coating; (4) covering a polytetrafluoroethylene film; (5) covering a glass tape; (6) sintering; and (7) machining a finished product. By adopting the method,since the meltable fluororesin coating is additionally arranged between the polytetrafluoroethylene layer and metal, stripping strength between the polytetrafluoroethylene layer and metal is increased; the polytetrafluoroethylene layer and metal layer are compounded together through high temperature; a formula of polytetrafluoroethylene is not limited and can be adjusted with high flexibility according to actual requirements; the type of the metal adopted by the bearing can be expanded, namely the metal can be a tough metal material, and can also be a friable metal material; and finally, the prepared metal-based polytetrafluoroethylene bearing does not have a weld joint or a connection point, the dimensional accuracy can be accurately controlled, and the high-accuracy requirements of aerospace and military machinery on dimension are met.
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Description

technical field

[0001] The invention belongs to the technical field of fluoroplastic processing, and in particular relates to a method for preparing a metal-based polytetrafluoroethylene bearing. Background technique

[0002] Metal-based PTFE material, as a self-lubricating material, combines the advantages of metal and PTFE, with high mechanical strength, good thermal conductivity, small thermal expansion coefficient, low friction coefficient, excellent wear resistance and wide operating temperature range specialty. Bearings made of this material are widely used in food, medical, aerospace, shipbuilding and other fields.

[0003] Publication No. CN 101074702A Chinese patent discloses a method for preparing a metal-based polytetrafluoroethylene self-lubricating bearing with a three-layer structure. This patent describes such a three-layer structure, a metal layer, a sintered bronze powder layer, and a filled polytetrafluoroethylene layer . The bearing prepared by this ...

Claims

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