Method and apparatus for manufacturing rectangular frames

Details Method and apparatus for manufacturing rectangular frames Method and apparatus for manufacturing rectangular frames

1995-05-05

1997-08-26

Sells, James

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

1563046, 1563099, 156499, 156580, B29C 6520

Patent

active

056606702

ABSTRACT:
The present invention relates to a method and an apparatus for manufacturing rectangular frames of plastic material, for example, casements and door and window frames. The frames are manufactured in a vertically operating or essentially vertically operating welding machine which is equipped with four welding heads which are movable relative to each other. Four plastic sections which are cut to length at the end faces and with bevels are placed from the operator side with the use of welding pieces into the at least one welding machine. The plastic sections are then clamped in the welding machine. All mitre surfaces are then simultaneously heated and joined together under pressure and the formation of welding beads to produce a closed frame. After moving the welding heads apart, the frame is subsequently moved out of the clamping plane on the side of the welding machine facing away from the operator side and is transferred to a transport device.

REFERENCES:
patent: 4752350 (1988-06-01), Schuster
patent: 4909892 (1990-03-01), Quinn et al.
patent: 4971639 (1990-11-01), Quinn et al.
patent: 4995935 (1991-02-01), Ganzberger
patent: 5006198 (1991-04-01), Pasquini
patent: 5370835 (1994-12-01), Sturtz
patent: 5439546 (1995-08-01), Brickenstein

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