Apparatus for forming structural sheets from fibrous biological

Details Apparatus for forming structural sheets from fibrous biological Apparatus for forming structural sheets from fibrous biological

1982-04-23

1984-05-29

Simmons, David A.

Adhesive bonding and miscellaneous chemical manufacture

Surface bonding means and/or assembly means therefor

With bending, folding, winding, or wrapping means

100 93P, 100139, 100185, 100187, 156202, 156324, 156463, 156467, 156555, 425308, 425404, B30B 700, B29J 500

Patent

active

044513224

ABSTRACT:
The apparatus accepts dry stripped crude fiber such as straw or sugar cane wastes, coconut husks, or elephant grass, compacts them into a relatively dense sheet, and bonds a strong surfacing material such as a heavy paper to the faces and edges. The sheet, continuously flowing from the apparatus, is cut into standard lengths and the cut ends are capped with the same surfacing material. A precompactor near the end of an entrance chute into the apparatus uniformly predensifies the incoming fiber prior to its compaction by means of a ram. The ram is carried on roller bearings especially adapted to withstand the weight and other forces associated with the continuous movement of the ram. The compacted material is continuously propelled by the ram and enters a press, where heat and pressure produce a dimensionally stable sheet bonded together partially by natural resins released from the fibers by the heat, and partially by mechanical interlinking between fibers. In the following operation, the sheet is covered with the surfacing material, which is successively folded over and bonded to the edges of the sheet. The surfacing material, provided in discrete rolls, is continuously available from a feeder station which facilitates the substitution of a fresh roll as the material is consumed. In the following sawing and end sealing operations, fully surfaced sheets of standard lengths are produced.

REFERENCES:
patent: 3185614 (1965-05-01), Van Hartesveldt
patent: 3367094 (1968-02-01), Harwig
patent: 3582010 (1971-06-01), Whiteman
patent: 3657055 (1972-04-01), Nichols
patent: 3671355 (1972-06-01), Paymal
patent: 4025278 (1977-05-01), Tilby

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