Method of molding a plastic vessel having a flash trap

Details Method of molding a plastic vessel having a flash trap Method of molding a plastic vessel having a flash trap

1995-11-03

1997-09-23

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

156292, 220613, B29C 6500

Patent

active

056701080

ABSTRACT:
A molded plastic vessel is made by hot plate welding together of weld bosses provided respectively on mating rim portions of first and second vessel forming component parts. The first molded part has a weld boss and a shroud which is located radially inboard of the weld boss and projects toward the second part. The second part has a weld boss axially aligned with the weld boss of the first part for mating thereto, and a shroud projecting toward the first part and spaced radially inboard of the shroud of the first part. Upon hot plate melting of weld bosses and the subsequent pressing together of the first and second parts, the shroud of the first part engages and pushes the melt flash projecting inboard of the weld boss of the first part into the space between the weld boss and shroud of the second part to thereby divert the melt flash from overflowing into the interior of the vessel.

REFERENCES:
patent: 3432072 (1969-03-01), Quercia
patent: 3562078 (1971-02-01), Zumstein
patent: 3706393 (1972-12-01), Curtis et al.
patent: 4353761 (1982-10-01), Woerz et al.
patent: 4601927 (1986-07-01), Durfee
patent: 4663206 (1987-05-01), Bouyoucos et al.
patent: 4670207 (1987-06-01), Yamada et al.
patent: 4886181 (1989-12-01), Haines
patent: 5049274 (1991-09-01), Leason et al.
patent: 5263606 (1993-11-01), Dutt et al.

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