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    Method and apparatus for automatic melt indexing
    1.
    发明授权
    Method and apparatus for automatic melt indexing 失效
    自动熔体分度的方法和装置

    公开(公告)号：US5008081A

    公开(公告)日：1991-04-16

    申请号：US256022

    申请日：1988-10-11

    申请人： David A. Blau ,  John Meadows ,  Thomas M. Sherlock ,  Fred Stengel ,  Robert M. Studholme ,  Kenneth R. Wada ,  Christopher J. Kepner

    发明人： David A. Blau ,  John Meadows ,  Thomas M. Sherlock ,  Fred Stengel ,  Robert M. Studholme ,  Kenneth R. Wada ,  Christopher J. Kepner

    IPC分类号： G01N11/04 ,  G01N33/44 ,  G01N35/00

    CPC分类号： G01N33/442 ,  G01N11/04 ,  G01N35/00 ,  Y10T436/11

    摘要： Computer-controlled method and apparatus for automatic melt index testing, including a housing with a base carrying a heater block having a bore therein for receiving a metal cartridge. A cartridge carousel is rotatably carried on the base, and carries a plurality of such cartridges, each cartridge having a plug at the bottom end thereof with a orifice through the plug, and each cartridge having a bore therein for receiving a sample of a test substance and for receiving a piston on top of the pellets. A lift arm grasps the cartridges, one at a time, and places each cartridge into the heater block, under the control of a microcomputer, by both lifting and rotating the transfer arm. The transfer arm includes a solenoid-operated grip for grasping the cartridges.The test unit carries a lift mechanism with a weight mounted atop a tamping rod, and an optical sensor for determining the height of the weight relative to the lift machinism. The weight is lowered by the lifting mechanism until it bears down upon the pellets, and then the cartridge is heated until the test substance melts. The weight is then used to extrude the melted substance through the plug orifice until it has fallen a certain distance, which operation is automatically timed by the computer. The time is then used in determining the melt index value for the substance. This operation is automatically repeated for all of the cartridges in the carousel.An automatic cut-off mechanism is used to cut off excess extrudate, and an extrudate carousel is automatically advanced to collect separate samples of the used extrudate. Optical sensors are provided to determine the motions of the components of the apparatus.

    摘要翻译： 用于自动熔融指数测试的计算机控制方法和装置，包括具有承载加热器块的底座的壳体，其中具有用于容纳金属盒的孔。 筒式转盘可旋转地承载在基座上，并且承载多个这样的盒，每个盒的底端具有一个插塞，其中一个孔通过插头，每个盒都有一个孔，用于接收一个测试物质的样本 并且用于在颗粒的顶部上接收活塞。 提升臂通过提升和旋转传送臂，一次一个握住盒式磁带，并在微型计算机的控制下将每个盒放置在加热器块中。 传送臂包括用于抓住盒的电磁操作把手。 测试单元携带一个重量安装在夯实杆上的升降机构，以及用于确定重量相对于提升机械加工度的高度的光学传感器。 通过提升机构降低重量，直到它压在丸粒上，然后加热筒直到被测物质熔化。 然后重量用于通过塞孔挤出熔化的物质，直到其下降一定距离，该操作由计算机自动计时。 然后将时间用于确定物质的熔体指数值。 旋转木马盘中的所有墨盒都会自动重复此操作。 自动切断机构用于切断多余的挤出物，并自动推进挤出物转盘以收集所使用的挤出物的单独样品。 提供光学传感器以确定装置的部件的运动。