Apparatus for forming a mineral wool fiberboard product

Details Apparatus for forming a mineral wool fiberboard product Apparatus for forming a mineral wool fiberboard product

1977-03-23

1978-06-27

Spicer, Jr., Robert L.

Plastic article or earthenware shaping or treating: apparatus

Air felting type shaping means

With particle liberating means

425 831, 19305, 19304, B29C 1300

Patent

active

040972097

ABSTRACT:
An apparatus for forming a mineral wool fiberboard product is described which includes means for separating mineral wool fibers and means for intimately mixing said fibers with a thermosetting powdered binder, means for entraining said mixture of fibers and binder in an air stream including means for directing said air stream into a mat-forming zone formed by converging upper and lower forming wires, means for exhausting air through said forming wires whereby the fiber and binder mixture is collected as two layers on the forming wires with the two layers becoming consolidated at the nip opening formed between the converging screens, and compacting and heating means whereby the mat of fibers and resins is compacted and cured to form a mineral fiberboard product, said exhaust system behind said screens being adjustable whereby the upper and lower outer layers of fibers and resins initially formed on said screens is comprised of an enriched layer of predominantly fine fibers. A preferred embodiment is disclosed wherein additional means are provided for positioning an open mesh glass fabric between the lower forming wire and the layer of fibers and resins being formed thereover, said fabric acting as a carrier for the board-forming mat. The process utilizing this apparatus is also described.

REFERENCES:
patent: 2188373 (1940-01-01), Pearce
patent: 3150215 (1964-09-01), Houghton
patent: 3276928 (1966-10-01), Pearson et al.
patent: 3544414 (1970-12-01), Simison
patent: 3644078 (1972-02-01), Tachibana et al.
patent: 3904336 (1975-09-01), Axer et al.

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