JPS56137949A - Particle board and manufacture thereof - Google Patents

Abstract

PURPOSE: T obtain the particle board having sufficient strength of sustainment as a structural material and being excellent in processing property by laminating a small-chip layer, a fiber material layer, a large-chip layer, another fiber material layer and another small-chip layer sequantially and by heating and pressing the laminate.

CONSTITUTION: Above a conveying surface consisting of a conveyor 1, a mesh-form fiber sheet 10 constituting the 1st reinforcing layer 11 is made to stand by in a rolled state between the 1st hopper 2 feeding small chips constituting a lower layer and the 2nd hopper 3 feeding large chips constituting an intermediate layer, both of which are arranged in the direction of conveyance, and is rolled back on to the conveying surface. Moreover, another mesh-form fiber sheet 10 constituting the 2nd reinforcing layer 12 is made to stand by in a rolled state between the 2nd hopper 3 and the 3rd hopper 4 feeding small chips constituting an upper layer and is rolled back on to the conveying surface. A laminated half-processed material 13 thus obtained, which is laminated in an order of the small-chip layer 8, the reinforcing layer 11, the large-chip layer 9, the reinforcing layer 12 and the small-chip layer 7 from below, is cut in a prescribed size in the direction of width and then heated and tightened under pressure by a hot press 5.

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