| 摘要 |
PURPOSE:To obtain a laminated board in which bubbles are not mixed and there is no sink by a method wherein packings in an elastic material are held among a plurality of hard boards located slantingly along the surrounding sections of the boards except upper opening sections, adhesives are poured, the mutual intervals of the boards are adjusted in fixed thickness and the adhesives are hardened. CONSTITUTION:Packings 3 in an elastic material are held among a plurality of hard boards 1, 2 located slantingly along the surrounding sections of the boards except upper opening sections, the mutual intervals of the boards are expanded to more than a fixed finishing interval within a range which does not break sealing of the packings 3, and held, adhesives 13 are poured among each board through the upper opening sections of the packings 3, a central section clearance holding material 4 is removed, the mutual intervals of the boards are adjusted to a fixed thickness and the adhesives are hardened. Thus, adhesion, in which bubbles are not mixed and sinks are not formed on the surfaces of the boards, is conducted. |
