SCARF JOINING METHOD OF PLYWOOD

PROBLEM TO BE SOLVED: To largely shorten a cycle time required for the scarf joining of plywood, and to improve productivity by employing a moisture-curable type urethane resin-based hot-melt adhesive.SOLUTION: The plywood (1) has a thickness (T) of 7.5-35 mm, a width (W) of 900-1,250 mm, and a leng...

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Bibliographische Detailangaben
1. Verfasser:	KUDO KIMIHIKO
Format:	Patent
Sprache:	eng
Schlagworte:	MANUFACTURE OF SPECIFIC WOODEN ARTICLES NAILING OR STAPLING MACHINES IN GENERAL PERFORMING OPERATIONS TRANSPORTING WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL WORKING VENEER OR PLYWOOD
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To largely shorten a cycle time required for the scarf joining of plywood, and to improve productivity by employing a moisture-curable type urethane resin-based hot-melt adhesive.SOLUTION: The plywood (1) has a thickness (T) of 7.5-35 mm, a width (W) of 900-1,250 mm, and a length (L) of 1,600-5,000 mm, moisture-curable type urethane resin-based hot-melt adhesives (5) are applied on scarf slopes (3f) (3r) shaved to the scarf ratio of 1:5 to 1:10 by 100-170 g/mand cold-pressed and cured for 10-20 sec. by hydraulic cold presses (6a), (6b) at a press clamping pressure of 0.8-1.0 MPa.