Method and apparatus for joining polymeric substrates such as vinyl
frames
    3.
    发明授权
    Method and apparatus for joining polymeric substrates such as vinyl frames 失效
    用于连接诸如乙烯基框架的聚合物基材的方法和设备

    公开(公告)号:US4971639A

    公开(公告)日:1990-11-20

    申请号:US316977

    申请日:1989-02-28

    IPC分类号: B29C65/00 B29C65/20

    摘要: A method and apparatus are provided for welding vinyl window and door frames. The apparatus includes a counting circuit or the like for measuring the time taken for burning off a selected length of a thermoplastic frame member. This time can be used to calculate a sufficient or optimal period for performing a heating or plastification step. Once the ends of the frame members are properly heated (plastified), they are fused by urging them towards each other. The fused members are then cooled for a period of time which also corresponds to the time required for burn-off. The apparatus further includes a heating plate which is pivotable between an operating position and a retracted position. The heating plate is also movable so that different surface portions can be used during burn-off and heating phases.

    摘要翻译: 提供了一种用于焊接乙烯基窗户和门框的方法和装置。 该装置包括用于测量烧掉热塑性框架构件的选定长度所花费的时间的计数电路等。 这一次可用于计算进行加热或塑化步骤的充分或最佳周期。 一旦框架构件的端部被适当地加热(塑化),则它们通过相互推动而被熔合。 然后将熔融的构件冷却一段时间,这也对应于燃烧所需的时间。 该装置还包括可在操作位置和缩回位置之间枢转的加热板。 加热板也可移动,使得在燃烧和加热阶段可以使用不同的表面部分。