Method of forming a headed thermoplastic tube

Details Method of forming a headed thermoplastic tube Method of forming a headed thermoplastic tube

1990-09-12

1991-12-03

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Differential temperature conditioning

264230, 264322, 264DIG41, B29C 4302, B29C 6102, B29C 6108

Patent

active

050698567

ABSTRACT:
A headed thermoplastic tube is formed solely from a thermoplastic extruded, stretched, cylinder by positioning the cylinder over a forming mandrel with an exposed portion. The inner surface of the exposed portion is heated above the glass transition temperature of the thermoplastic material to render the inner surface molten while the outer surface provides support for the exposed portion of the cylinder. The heated exposed portion is then shaped into a conical shape, such as by heating the outer surface, and pressure applied to the conical shaped exposed portion to form a headed thermoplastic tube. The headed tubes produced have a body portion, shoulder portion and neck portion, without any seams, all of which are formed from the starting thermoplastic extruded, stretched cylinder.

REFERENCES:
patent: 2900665 (1959-08-01), Walker
patent: 2945266 (1960-07-01), Mainardi
patent: 3047910 (1962-08-01), Downs
patent: 3984268 (1976-10-01), Holoubek et al.
patent: 4219525 (1980-08-01), Greenspan
patent: 4424182 (1984-01-01), Cerny
patent: 4590028 (1986-05-01), Rosenkrantz et al.
patent: 4681645 (1987-07-01), Fukushima et al.
patent: 4701295 (1987-10-01), Kato et al.

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