Process for producing hollow member

Details Process for producing hollow member Process for producing hollow member

2007-02-13

2007-02-13

McDowell, Suzanne E. (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Differential temperature conditioning

C264S532000, C264S573000

Reexamination Certificate

active

10490465

ABSTRACT:
A process is provided for producing a hollow member having a wall thickness, in a cross section orthogonal to the longitudinal direction, that varies in the longitudinal direction, the process including a heating step of heating a tubular material (Pa) so that the tubular material (Pa) is given a temperature variation in the longitudinal direction, and a stretching step of axially stretching the tubular material (Pa) that has been heated in the preceding step. In this way, a hollow member having a cross-sectional wall thickness that is variable in the longitudinal direction can be easily produced.

REFERENCES:
patent: 5411477 (1995-05-01), Saab
patent: 6852267 (2005-02-01), Keller
patent: 61-245922 (1986-11-01), None
patent: 63-242429 (1988-10-01), None
patent: 05-076950 (1993-03-01), None
patent: 06-055226 (1994-03-01), None
patent: 10-230318 (1998-09-01), None

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