Method of forming a tubular container

Details Method of forming a tubular container Method of forming a tubular container

1976-08-09

1978-06-27

Hoag, Willard E.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

264313, 264334, B29C 504, B29D 302

Patent

active

040975720

ABSTRACT:
A method of forming a tubular container such as a pipe or a tank includes providing a drum rotatable about an axis with an axially split liner in the drum. The drum and the liner are rotated together about the axis, and a time-setting plastic and reinforcing roving are discharged against the inside of the liner. When the plastic has at least partially set, the liner, plastic and roving are removed from the drum. After further plastic setting, if desired, the liner is removed from the plastic and roving for reuse. Preferably the split in the liner is covered with tape before rotation and is removed thereafter.

REFERENCES:
patent: 1986629 (1935-01-01), Fenton
patent: 2042536 (1936-06-01), Leguillon
patent: 3012922 (1961-12-01), Wiltshire
patent: 3099593 (1963-07-01), Syracuse
patent: 3150219 (1964-09-01), Schmidt
patent: 3778206 (1973-12-01), Barratt
patent: 3939241 (1976-02-01), Powell et al.

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