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    • 45. 发明授权
    • Method for producing a reduced-pressure shaped mould
    • 减压成形模的制造方法
    • US4028455A
    • 1977-06-07
    • US623456
    • 1975-10-17
    • Shoji UedaShuzi OnoHiroshi SakaguchiHideo Tsunoda
    • Shoji UedaShuzi OnoHiroshi SakaguchiHideo Tsunoda
    • B22C3/00B22C9/02B22C9/03B29C33/38B29C51/10B29C17/04
    • B29C33/3821B22C9/03B29C51/10
    • A method for producing a reduced-pressure shaped mould comprises the steps of placing a pattern having gas-permeable orifices on a surface plate and adhering a coating film that is soluble in a solvent to the pattern by suction through the orifices. A flask having evacuating means is then placed on the surface plate on top of the film and the space portion defined by the film and the flask is filled with solid particles containing no caking agent which serves as a mould material. The mould material and flask are covered with an air-tight sheet and the evacuating means of the flask is actuated while that of the surface plate is released so that the sheet and coating film adhere to the upper and low surfaces respectively of the mould material by suction. The pattern and surface plate are then separated from the flask and a solution containing caking agent dissolved in the solvent is applied to the coating film which is adhered to the surface of a cavity formed at the lower surface of the mould material. The caking agent penetrates interstices between the solid particles whereby a layer that has been hardened by the caking agent may be formed in a surface layer portion bounding the cavity.
    • 一种生产减压成型模具的方法包括以下步骤:将具有透气孔的图案放置在表面板上,并将可溶于溶剂的涂膜通过抽吸抽吸到图案上。 然后将具有排气装置的烧瓶放置在膜顶部的表面板上,由膜和烧瓶限定的空间部分填充有不含作为模具材料的结块剂的固体颗粒。 将模具材料和烧瓶用气密性片材覆盖,并且释放烧瓶的抽真空装置,同时释放表面板的抽真空装置,使得片材和涂膜分别通过模具材料的上表面和低表面粘附到模具材料的上表面和低表面 抽吸。 然后将图案和表面板与烧瓶分离,并将含有溶解在溶剂中的结块剂的溶液施加到粘附到形成在模具材料的下表面处的空腔的表面上的涂膜。 结块剂渗透固体颗粒之间的空隙,由此可以在界定空腔的表面层中形成已被结块剂硬化的层。