SU431084A1 - DEVICE FOR CENTERING A MOVING TAPE MATERIAL - Google Patents

Description

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The invention relates to a device for centering a tape material, it can be used to automatically adjust the position of a film obtained on an extrusion irrigation machine.

It is known to stabilize moving tape material, which comprises a blow chamber with a perforated curvilinear working surface for creating an air cushion, a material edge position sensor and a control mechanism. The known device performs centering due to the creation of an asymmetrical air cushion, which leads to stretching and misalignment of the material, and also does not provide an adequate degree of accuracy of centering, since it does not take into account the inaccuracy of manufacturing the controlled material.

The aim of the invention is to eliminate this drawback. This goal is achieved by the fact that the device is arranged sabzheio perpendicular to the working surface of the blowing chamber and overlapping part of its shield, installed with the possibility of movement along the chamber and connected with the actuator.

The drawing schematically shows the described device.

The device contains a blowing chamber / with a perforated curved working

surface a to create an air boost, guide rollers 2 and 3, a material edge position sensor 4, position setpoint 5, controller 6,; a recording device 7 and an actuator 8 connected to controller 6. Controller 6 input connected to the output of the sensor 4 and the output of the setting device 5.

The input of the registering device 7 is connected with the output of the sensor 4. Perpendicularly to the working surface of the chamber, its flaps 9 and 10, which overlap a part, are interconnected by a rod 11, which moves along the chamber} the operating mechanism 8.

The device works as follows.

Moving tape material 12 is charged between camera 1 and guide rollers 2 and 3. When the material position L2 is changed, the output signal of sensor 4 changes proportionally. The current value of sensor 4 is compared with controller 6 set on unit 5

the latter generates a control signal, which is fed to the actuator 8. In accordance with the control signal, the actuator moves the clamp 11, sets the flaps 9 10 to the desired position along the chamber /. Wherein

the gap between one edge of the material and its corresponding flap decreases, and between the other increases. The main air flow receives directional movement to one of the edges and carries the material 12 along with it, helping to center the material and compensate for the disturbing force. In this way, the magnitude of the ipac matching between the current and the set value of the material edge position sensor is eliminated.

The device described can be simultaneously used to measure the thickness and width of the material.

Subject invention

A device for centering a moving tape material, comprising a blast chamber with a perforated curvilinear working surface for creating an air bed, a sensor for positioning the edge of the material and an actuator, characterized in that THAT, in order to improve the accuracy of centering, it is provided with perpendicular to the working surface of the blow chamber and covering part of it are guards mounted for movement along the chamber and connected with the actuator.

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