Method of manufacturing rectangular frames

Details Method of manufacturing rectangular frames Method of manufacturing rectangular frames

1992-11-20

1994-12-06

Vargot, Mathieu

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

264161, 2642975, 2642978, 1563046, 425506, B29C 6520, B29C 7100

Patent

active

053708350

ABSTRACT:
A method of manufacturing rectangular frames made of plastic materials, in which at least two four-head welding machines arranged on a turntable are alternatively fitted out with four plastic shaped pieces cut to a predetermined length with corresponding mitres, and clamped together. A frame is welded in a respective welding machine by applying heat and pressure to all mitre surfaces to form welding beads thereat. The welded frame is then transferred to a cleaning machine for treatment of protruding weld bead portions.

REFERENCES:
patent: 3809739 (1974-05-01), Gelin
patent: 4718960 (1988-01-01), Pasqualini
patent: 4752350 (1988-06-01), Schuster
patent: 4909892 (1990-03-01), Quinn et al.
patent: 4995935 (1991-02-01), Ganzberger
patent: 5006198 (1991-04-01), Pasquini
patent: 5063015 (1991-11-01), Lloyd et al.
patent: 5073329 (1991-12-01), Carrara

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