Method of manufacturing molded resin foam and apparatus therefor
    1.
    发明授权
    Method of manufacturing molded resin foam and apparatus therefor 失效
    制造模制树脂泡沫及其设备的方法

    公开(公告)号:US5248459A

    公开(公告)日:1993-09-28

    申请号:US730789

    申请日:1991-07-23

    摘要: A method of manufacturing a molded resin foam by charging pre-expanded resin pellets into a cavity of a mold and subjecting them to expansion molding. In order to minimize differences in weight of the foam from product to product, the method is characterized in that prior to charging, the apparent density of the pre-expanded resin pellets is measured and, upon charging, the cracking width of the mold is regulated, on the basis of the measurement result, to a definite value determined depending upon the apparent density, whereby the weight of the pellets charged in the mold cavity is made constant. An apparatus for carrying out the method is characterized by providing an automatic expansion molding machine with an arrangement (2,3,4) for sampling a feedstock from a feed-stock hopper (1) and measuring its apparent density before molding, equipment (8) for measuring a current mold-closing position which interlocks with a mold opening or closing positioner (9), and a computer automatic cracking width control device (10) for obtaining the inputs of measured apparent density value and current mold-closing position from the former two, computing an optimal cracking width based on apparent density according to a program prepare beforehand, closing a hydraulic feed line for mold closing of a hydraulic mold opening or closing unit (11-16), and stopping the mold-closing at a position of the optimal cracking width.

    摘要翻译: PCT No.PCT / JP90 / 01532 Sec。 371日期:1991年7月23日 102(e)日期1991年7月23日PCT 1990年11月26日PCT PCT。 公开号WO91 / 08102 日期:1991年6月13日。一种通过将预发泡树脂颗粒装入模具的空腔并对其进行膨胀成型制造模制树脂泡沫的方法。 为了使产品与产品的重量的差异最小化,该方法的特征在于,在充电之前,测量预发泡树脂颗粒的表观密度,并且在充电时,模具的开裂宽度被调节 基于测量结果,确定取决于表观密度的确定值,由此将填充在模腔中的颗粒的重量变为恒定。 一种用于实施该方法的装置的特征在于提供一种自动膨胀成型机,其具有用于从原料料斗(1)取样原料并测量其成型前的表观密度的装置(2,3,4),设备(8 ),用于测量与模具打开或关闭定位器(9)互锁的当前模具关闭位置;以及计算机自动裂缝宽度控制装置(10),用于从所述模具打开或关闭定位器(9)获得测量的表观密度值和当前模具关闭位置的输入 前者二,根据预先准备的程序计算出基于表观密度的最佳裂缝宽度,关闭用于液压模具打开或关闭单元(11-16)的模具关闭的液压进给管线,并且在模具闭合位置停止 的最佳开裂宽度。