Apparatus for vacuum thermoforming polymeric sheet material
    3.
    发明授权
    Apparatus for vacuum thermoforming polymeric sheet material 失效
    真空热成型聚合物片材的设备

    公开(公告)号:US4284396A

    公开(公告)日:1981-08-18

    申请号:US168731

    申请日:1980-07-14

    CPC classification number: B29C51/225 Y10S425/048

    Abstract: Apparatus for vacuum molding a plurality of three dimensional geometrical shapes in a thermoplastic polymeric sheet having a molding plate, the surface of which has a plurality of three dimensional geometrical shapes, with said molding plate having an enclosing border, a molding face and a non-molding face; a gas orifice extending through the molding plate so that a gas can flow from one face of the molding plate to the other face; a mechanism to move the molding plate along a predetermined path; a mechanism to maintain a thermoplastic polymeric sheet, heated to a plastic condition, adjoining the moving molding plate molding face; a mechanism to releasably seal the heated polymeric sheet to and all around the molding plate border; a vacuum source to remove gas, from between the heated polymeric sheet and the molding face of the molding plate, through the gas orifice whereby exterior pressure can force the heated sheet against the molding face surface; and a mechanism for removing the molded sheet, after it cools to a non-plastic condition, from contact with the moving molding plate face.

    Abstract translation: 用于在具有模制板的热塑性聚合物片材中真空模制多个三维几何形状的装置,所述模制板的表面具有多个三维几何形状,所述模制板具有封闭边框,模制面和非平面形状, 成型面 延伸穿过模制板的气体孔,使得气体可以从成型板的一个面流动到另一个面; 沿预定路径移动模板的机构; 维持加热到塑料状态的热塑性聚合物片材的机构,邻接移动的模制成型面; 将加热的聚合物片材可释放地密封到模制板边界周围的机构; 真空源,以通过气体孔口从加热的聚合物片材和模制板的成型面之间移除气体,由此外部压力可以迫使加热的片材抵靠模制面表面; 以及将其从冷却至非塑性状态后移除模塑片的机构与移动的模制板面的接触。

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