公开(公告)号：US4249478A

公开(公告)日：1981-02-10

申请号：US23468

申请日：1979-03-23

Applicant: Rolf Gruener

Inventor： Rolf Gruener

IPC: B05C5/00 ,  B05C11/02

CPC classification number: B05C11/02 ,  B05C5/004 ,  B05C5/005 ,  Y10S118/04

Abstract: A controller for maintaining a constant thickness of a layer applied to work pieces fed through a liquified curtain, the curtain itself being provided through a positive displacement pump which is driven by a motor having means for varying its speed from a remote locate. The work pieces are fed by an infeed conveyor, which is also driven by a motor of the variable speed type, and magnetic pickups or sensors are provided to produce two discrete trains of pulses indicative of the speed of the infeed conveyor, and of the positive displacement pump respectively. A digital readout ratio calculating unit is provided to produce a display indicative of the ratio of these pulse train frequencies, and the unit can be preset to provide an input to low and high limit preset counters. The preset low and the high preset counts are electrically connected to relays, which control the speed of the pump motor itself through conventional circuitry, and the resulting controller provides for continuously updating the speed of the pump motor to maintain a predetermined ratio of its speed to that of the infeed conveyor for maintaining a predetermined coating thickness on the work piece.

Abstract translation: 一种用于保持施加到通过液化窗帘供给的工件的层的厚度恒定的控制器，帘幕本身通过由具有用于从远距离定位改变其速度的装置的电动机驱动的容积式泵提供。 工件由进给输送机进给，该进给输送机也由可变速型的马达驱动，提供磁性拾取器或传感器以产生两个表示进料输送机的速度的分立的脉冲序列，以及正向 位移泵分别。 提供数字读出比率计算单元以产生表示这些脉冲序列频率的比率的显示器，并且该单元可被预设为向低和高限制的预设计数器提供输入。 预设的低电平和高预置计数电连接到继电器，继电器通过常规电路控制泵电机本身的速度，并且所得到的控制器提供持续更新泵电机的速度以将其速度的预定比率保持 用于在工件上保持预定涂层厚度的进料输送机。