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    • 1. 发明授权
    • Method and apparatus for accurate die-cutting
    • 用于精确切割的方法和装置
    • US3899945A
    • 1975-08-19
    • US41194173
    • 1973-11-01
    • KOPPERS CO INC
    • GARRETT CLYDE BARNERTHAYER WILLIAM STANSBURY
    • B26D5/00B26F1/38F16H61/02H02P5/50B23D25/12B26D1/56
    • H02P5/50B26D5/00B26D5/08B26D5/086B26D5/20B26F1/384F16H61/0202F16H2718/16Y10T83/0519Y10T83/141Y10T83/4693Y10T83/4743Y10T83/4838Y10T83/8745
    • Inaccurate cuts often occur in paperboard blanks passing between a pair of cooperating die and anvil cylinders because of anvil cylinder wear, irregular blank velocity, and other factors. Such inaccuracies are reduced by the method of driving the die cylinder at a preselected angular velocity and driving the anvil cylinder at an angular velocity proportional to the angular velocity of the die cylinder with the preselected proportion being maintained during changes in angular velocity of the die cylinder. The apparatus generally preferred for performing the method includes a mechanical variable speed transmission having an input driven by the die cylinder and an output for driving the anvil cylinder at an angular velocity corresponding to the angular velocity of the input and with the output velocity being selectively variable with respect to the input to provide an output velocity selectively proportional to the input velocity. However, the apparatus primarily preferred for performing the method includes a sensor means for sensing the velocity of the die cylinder, a variable speed motor means for driving the anvil cylinder, and a motor controller means responsive to the sensor means for controlling the output speed of the motor means to proportionally correspond to the velocity of the die cylinder, the controller means also including variable speed control means for changing the proportion of the anvil cylinder velocity to the die cylinder velocity for changing the output speed of the motor means. Another embodiment utilizes a mechanical variable speed transmission means in lieu of the motor means and a ratio control motor means responsive to the sensor through a similar motor controller means for varying the output of the transmission means to achieve a preselected proportion which is maintained during changes in velocity of the die cylinder.
    • 由于砧筒磨损,不规则的坯料速度和其他因素,通常会在通过一对配合的模具和砧座缸之间的纸板坯料中发生不精确的切割。 通过以预选的角速度驱动模具缸的方法来减小这种不准确度,并且以与模具缸的角速度成比例的角速度驱动砧筒,并且在模具缸的角速度的变化期间保持预选比例 。 通常优选用于执行该方法的装置包括具有由模具缸驱动的输入的机械变速传动装置和用于以对应于输入的角速度的角速度驱动砧筒的输出,并且输出速度是选择性变化的 相对于输入提供与输入速度成正比的输出速度。 然而,主要优选用于执行该方法的装置包括用于感测模具缸的速度的传感器装置,用于驱动砧筒的变速马达装置和响应于传感器装置控制输出速度的马达控制装置 电动机意味着成比例地对应于模具缸的速度,控制器装置还包括用于改变砧座气缸速度与模具缸速度的比例的变速控制装置,用于改变电动机装置的输出速度。 另一实施例利用机械变速传动装置代替电动机装置,以及比率控制电动机装置,其通过类似的电动机控制装置响应于传感器,用于改变变速装置的输出,以实现在变更期间保持的预选比例 模具缸的速度。