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    • 3. 发明授权
    • Method and apparatus for controlling the weight per unit length of a
continuous extrudate
    • 用于控制连续挤出物的每单位长度重量的方法和装置
    • US4844846A
    • 1989-07-04
    • US144211
    • 1988-01-15
    • John E. Peterson, Jr.Anthony M. Apicella
    • John E. Peterson, Jr.Anthony M. Apicella
    • B29C47/92
    • B29C47/92B29C2947/9259B29C2947/92676B29C2947/92923B29C47/0019B29L2030/002
    • Stringent specifications for an extrudate are maintained by accurate control of tread weight per unit length without regard for dimensional changes of the extrudate. This is achieved simply by adjusting the speed of a single variable-speed conveyor, whether the running-weigh-scale ("RWS") conveyor, or, the take-away conveyor, without adjusting the extruder screw, or operation of the extruder, and without measuring any dimension (width or gauge) of the extrudate; therefore, with no regard either to the cross-sectional area, or surface area, or volume of the tread. The accuracy of control depends chiefly on how accurately one can measure the weight/unit length, and how precisely the speed of the single variable-speed conveyor can be controlled. Exceptional on-spec control in the continuous extrusion of a tread stock is achieved because it was recognized that dimensional changes of the tread stock, independent of its change in weight/unit length, do not adversely effect the specifications of the extruded tread. This process and the particular configuration of the equipment in the tread line is particularly adapted to make the necessary comparison of RWS and target values which results in the production of extrudates with a weight tolerance of less than .+-.5%, and preferably less than .+-.2%.
    • 通过精确控制每单位长度的胎面重量来保持挤出物的严格规格,而不考虑挤出物的尺寸变化。 这可以通过调整单个可变速度输送机的速度来实现,无论是运行秤(“RWS”)输送机,还是在不调节挤出机螺杆的情况下,收集输送机,或挤出机的操作, 并且不测量挤出物的任何尺寸(宽度或规格); 因此,不考虑胎面的横截面积或表面积或体积。 控制的准确性主要取决于测量重量/单位长度的准确程度,以及如何可以控制单个变速输送机的速度。 由于认识到胎面油料的尺寸变化,与其重量/单位长度的变化无关,不会对挤压胎面的规格产生不利影响,因此可以实现胎面料的连续挤出中的特殊的规格控制。 该方法和胎面生产线中设备的特定配置特别适用于对RWS和目标值进行必要的比较,这导致挤出物的生产重量公差小于+/- 5%,优选小于 +/- 2%。