Method of preshaping a preformed lignocellulosic mat for molding

Details Method of preshaping a preformed lignocellulosic mat for molding Method of preshaping a preformed lignocellulosic mat for molding

1980-09-16

1983-10-11

Hall, James R.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Bulk deposition of particles by differential fluid pressure

264518, 264547, 264553, 264571, 264DIG78, 264118, 264122, B29J 500

Patent

active

044091753

ABSTRACT:
A molding mixture comprising a filler, such as wood particles and a resin binder, is pressed under light pressure on a flat bed to produce a mat with a density between 1/15 and 1/3 of the material in the finished article to be made by pressure molding. A molding preform is then made from a piece of such mat having a suitable contour, by sculpturing one side of the mat with suction devices to provide a thickness variation over the mat area corresponding to the requirements of the molding step.

REFERENCES:
patent: 3882211 (1975-05-01), Kamp
patent: 4081501 (1978-03-01), Muther
patent: 4263239 (1981-04-01), Dunbar et al.

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