Apparatus and method of making hollow articles
    3.
    发明授权
    Apparatus and method of making hollow articles 失效
    制造中空制品的装置和方法

    公开(公告)号:US4130619A

    公开(公告)日:1978-12-19

    申请号:US806997

    申请日:1977-06-16

    申请人: Franklin W. Held

    发明人: Franklin W. Held

    摘要: This invention is directed toward making hollow racquet ball balls. This is accomplished by molding a mass of vulcanizable elastic material to hollow semi-spherical form and heating the bulk of the material substantially fully to vulcanize it while simultaneously cooling a portion around the full edge so it is only partially vulcanized at the edge area thereof. Then two of such semi-spherical forms have the edges thereof abutted under some pressure to force the uncured edges together, and heat is then applied to the uncured edges of each half to fully vulcanize them and bind them together to form a unitary seamless ball thereform.Apparatus for forming the balls includes mold means defining a hollow semi-spherical cavity with a cooling chamber being provided at the open edge of the cavity that defines an edge of the formed hollow half sphere whereby a cooling medium can be circulated at the edge to prevent vulcanization thereof while the remaining part of the hollow half sphere is heated and vulcanized.

    摘要翻译: 本发明涉及制造中空球拍球球。 这通过将大量可硫化弹性材料模制成中空半球形并且基本上完全加热材料的大部分硫化而实现,同时冷却整个边缘周围的部分,使得其仅在其边缘区域部分硫化。 然后,两个这样的半球形形状的边缘在一定压力下邻接以迫使未固化的边缘在一起,然后将热量施加到每一半的未固化的边缘以使它们完全硫化并将它们结合在一起形成一体的无缝球 。