Manufacture of blank board for furniture or the like

Abstract

Abstract PURPOSE:To manufacture a product without air void as a blank board for furniture or the like comprising a thick peripheral part and a thin central part by arranging the core member along the flow of resin in the periphery thereof to make equal the flow velocity of the injected resin between the peripheral part and the central part thereof. CONSTITUTION:A core member 13 is inserted at necessary points in a thick periphery 11 with a large sectional area in a mold, where spacers 14 almost equal in the thickness were placed in part on the surface side R and back side W and after the mold is clamped, a rew resin is injected into the mold to perform an RIM molding. If made of the same material as the injected resin, the spacers 14 are in noway brought to the notice, which is not always necessary. The cylindrical shape of the spacers 14 made so as not to block the flow of the resin eliminates trapping of air. The flow velocity of the injected resin can be virtually the same between the thick periphery 11 and the thin center 12 simply by adjusting the core member 13 and the thickness of the spacers 14 properly.

Inventors

• 👤 Minoru Saito
• 👤 稔 齋藤
• 👤 Makoto Yamamoto
• 👤 誠 山本

Bibliographic Details