Material of porous polyimide holder and molding technique
A technology of polyimide and pure polyimide, which is applied in the field of bearing cages, can solve problems such as low strength, short life, and low reliability, and achieve the effects of increased strength, improved machining performance, and improved reliability
Inactive Publication Date: 2005-01-12
LUOYANG BEARING RES INST CO LTD
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Problems solved by technology
[0006] In order to overcome the defects existing in the prior art, the object of the present invention is to provide a porous pol
Method used
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[0023] The specific implementation of the molding process for preparing the newly developed porous polyimide cage material is:
[0024] Sieve the pure polyimide material to make the polyimide powder reach a particle size of 80-300 mesh; put it into a mold and press it, and the molding pressure is: 2kN / cm 2 ~8kN / cm 2 ; Lock the mold, the locking force is: 100N ~ 500N; sintering in the sintering furnace, the sintering temperature: 370 ℃ ~ 390 ℃; heat preservation, heat preservation time: 5 ~ 40 minutes; finally cooling, demoulding.
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A porous polyimide holder is prepared from pure polyimine powder through sieving, loading in mould, pressing, locking, sintering at 370-390 deg.C, keeping the temp for 5-40 mi, cooling and demoulding.
Description
Technical field: [0001] The invention relates to the technical field of bearing cages. A porous polyimide cage material and its molding process Background technique: [0002] Porous polyimide cages are mainly used in bearings that need to work under special conditions, such as low friction torque, high vacuum, strong radiation, and cannot fully replenish lubricating oil. This type of bearing is mainly used in aviation, aerospace, navigation and other fields. [0003] Foreign countries have developed porous polyimide cage materials for manufacturing cages since the 1970s, and developed porous polyimide cage materials with better performance in the 1980s, which are still in use today. Continuous work is carried out to improve and enhance the properties of materials. Since the porous polyimide cage material is mainly used for military bearings, the formula and molding process of this material are highly confidential in foreign countries. Most of the foreign materials we can ...
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Inventor 王子君葛世军王枫梁波臧稳通郭向东
Owner LUOYANG BEARING RES INST CO LTD
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