Plastic and nonmetallic article shaping or treating: processes – Forming articles by uniting randomly associated particles
Patent
1973-12-11
1976-09-21
Arnold, Donald J.
Plastic and nonmetallic article shaping or treating: processes
Forming articles by uniting randomly associated particles
106104, 264110, 264124, 264125, B29J 500
Patent
active
039819507
ABSTRACT:
Method for the production of cement-bonded molded articles, particularly lightweight boards of wood fiber, wood chips or other lignocelluloses, of mineral fibers, glass fibers, plastic chips and fibers or various lightweight materials, like expanded silicates, expanded clay or expanded glass or granules of foamed plastics as a base material and portland cement as a binder, characterized in that the molded articles are produced in a heated molding duct formed of endless moving belts, for example, steel belts, using a portland cement as a binder in the molding compound which contains 1 to 30% by weight, perferably 15 to 25% by weight, of a calcium-halogen aluminate of the composition 11CaO.7Al.sub.2 O.sub.3.CaX.sub. 2 wherein X is any halogen. The cement with added calcium-halogen aluminate has such a short setting time, which is further accelerated by heating during molding, that boards may be successfully made on a continuous basis using a belt-molding machine.
REFERENCES:
patent: 3271492 (1966-09-01), Elmendorf
patent: 3767435 (1973-10-01), Mori et al.
patent: 3819389 (1974-06-01), Uchikawa et al.
Pletzer Fridolin
Strasser Hubert
Tschernuth Hans
Arnold Donald J.
Brunsvold Brian G.
Mintz Herbert H.
Murray, Jr. Everett H.
Osterreichisch-Amerikanische Magnesit Aktiengesellschaft
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