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    Method and apparatus for forming articles from plastic sheet material
    8.
    发明授权
    Method and apparatus for forming articles from plastic sheet material 失效
    从塑料片材成型制品的方法和装置

    公开(公告)号：US3879159A

    公开(公告)日：1975-04-22

    申请号：US46695474

    申请日：1974-05-06

    申请人： SMITH ROBERT J

    发明人： SMITH ROBERT J

    IPC分类号： B29C51/00 ,  B29C17/04

    CPC分类号： B29C51/00 ,  Y10S425/06

    摘要： A vacuum-forming apparatus and method for making a pair of adjacent compartment liners from a single sheet of thermoplastic material. In the apparatus aspect, a pair of adjacent molds, each affording the desired shape of the inside surface of the corresponding liner to be formed, are mounted along their base portions on a frame structure hinged in the region of adjacency of the mold base portions, to provide for pivotation of the respective base portions so that confronting surfaces of the molds are movable angularly toward and away from one another. Table structure supports the pivotable frame structure and is mounted for tilting about an axis generally parallel to the axis of pivotation of the molds. In the method aspect, a sheet of thermoplastic material is disposed to extend over the molds and is heated to a pliable, softened state while the molds are held in pivoted positions, in which the confronting surfaces are substantially spaced from one another, and while the table structure is held in upwardly tilted position. The pliable sheet of thermoplastic material is then caused to billow away from the pivoted and tilted molds, whereupon mold assist-plugs and the molds are then moved, relatively, toward one another, to urge the sheet to generally close conformity with the molds. While the sheet of thermoplastic material is still pliable, the frame structure is pivoted to cause confronting adjacent wall portions of the mold to move toward one another and assume a closely spaced relation, while the table structure is moved from its tilted position to a substantially horizontal position. Air entrapped between the pliable sheet and the walls of the molds is then evacuated through a number of small ports or vents in the walls, thereby forming the desired liners over the molds. The liners are then cooled and stripped as a unit from the molds.

    摘要翻译： 一种真空成型设备和方法，用于从单张热塑性材料制造一对相邻的隔室衬里。 在设备方面，一对相邻的模具，其各自提供所要形成的相应衬垫的内表面的形状沿其基部安装在框架结构上，所述框架结构铰接在与模具基部相邻的区域中， 以提供相应的基部的枢转，使得模具的相对表面可以朝向和远离彼此成角度地移动。 桌子结构支撑可枢转的框架结构，并且安装成用于围绕大致平行于模具的枢转轴线的轴线倾斜。 在方法方面，一片热塑性材料设置成在模具上延伸并且被加热到柔软的软化状态，同时模具被保持在枢转位置，其中相对表面彼此基本间隔开，而在 桌子结构保持在向上倾斜的位置。 然后将柔韧的热塑性材料片材从枢转和倾斜的模具中凸起，随后，模具辅助插头和模具相对地彼此移动，以促使片材与模具大致紧密地一致。 当热塑性材料片仍然柔软时，框架结构枢转以使模具的相邻壁部相对移动并呈现紧密间隔的关系，同时桌面结构从其倾斜位置移动到基本水平 位置。 然后将夹在柔性片和模具壁之间的空气通过壁中的若干小口或排气孔排出，从而在模具上形成所需的衬垫。 然后将衬垫冷却并从模具中作为一个单元剥离。