Method of making bicycle tubular frame of plastic composite mate

Details Method of making bicycle tubular frame of plastic composite mate Method of making bicycle tubular frame of plastic composite mate

1992-08-28

1994-06-07

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

264258, 264314, 156156, 156187, 156188, 156194, 156245, 2802811, B29C 4318

Patent

active

053187423

ABSTRACT:
A method of making a bicycle frame of plastic composite material includes a process in which an inner tube is wrapped orderly with at least a thermoplastic matrix layer and a long fiber reinforcing layer, so as to form a tubular object having a laminated outer shell. The tubular object is placed in a molding tool, which is then heated up to a temperature corresponding to the melting point of the thermoplastic matrix. Under the condition that the heating temperature is maintained, a pressurized gas having a pressure is introduced into the tubular object in such a manner that the pressure is increased progressively and stepwise for a predetermined period of time. The molding tool is finally cooled to permit the removal of a newly-formed bicycle frame, which is light in weight, strong and tough.

REFERENCES:
patent: 3256125 (1966-06-01), Tyler
patent: 3493240 (1970-02-01), Jenks
patent: 4144632 (1979-03-01), Stroupe
patent: 4889355 (1989-12-01), Trimble
patent: 5047263 (1991-09-01), Glemet
patent: 5076601 (1991-12-01), Duplessis
patent: 5176868 (1993-01-01), Davis
patent: 5198058 (1993-03-01), You

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