| 摘要 |
PURPOSE:To make it possible to uniformly propagate pressing force over the whole surface of a formed article and consequently realize favorable in-mold transferability and, at the same time, high back surface properties by a method wherein molding material is pressure-molded through cushioning material in the mold when thin-walled article is produced by compressing the molding material in the mold. CONSTITUTION:In the method for manufacturing a thin-walled article by compressing molding material with and in molds made of rigid bodies, a cavity mold 1 is made of rigid body and a core mold 3 is provided with cushioning material 2 or made of material having cushioning properties. As the cushioning material 2, rubber sheet, asbestos sheet or the like is used. When the releasability of the cushioning material 2 is poor, releasant 4 such as polyamide, polyethylene terephthalate or the like is applied on the surface of the cushioning material 2. Thus, molding material made of crosslinked methacrylate-based resin, especially of methacrylate-based partially crosslinked gel-like polymer can be favorably molded under heat and pressure. |
