Roller gap measuring and regulating method of four-roller paint applicator

Abstract

The invention relates to a roller gap measuring and regulating method of a four-roller paint applicator. A device for the method comprises a four-roller paint applicator, wherein shaft heads at both ends of an upper rubber roller and a lower rubber roller are respectively arranged on a slide block, and one side of a roller gap between the upper rubber roller and the lower rubber roller is provided with a set of narrow laser generators which horizontally irradiate to the roller gap; a light path at the other side of the roller gap between the upper rubber roller and the lower rubber roller is provided with a set of photo-electric receiving converters; and output wires of the photo-electric receiving converters are connected with a stepping motor control circuit. The roller seam measuring and regulating method is characterized in that the measurement of a flexible roller gap in the four-roller paint applicator is realized by a narrow laser beam arranged on a precise measuring tool. The method has the advantages of higher precision, accurate control and simple circuit when utilized to measure and regulate the roller gap.

Description

Technical field [0001] A roll gap measurement and adjustment method, especially a four-roll paint machine roll gap measurement and adjustment method. Background technique [0002] The main purpose of the four-roller paint machine is to coat the surface of the workpiece with a uniform thickness of paint film according to the process and technical requirements, and then perform performance testing on the coated workpiece according to the inspection standard. It is a special equipment necessary for the paint industry before the paint performance test , The thickness of the paint film is measured in microns when coating the film, and the accuracy of the thickness is mainly achieved by the nip between the upper rubber roller and the lower rubber roller. Therefore, the size of the nip is very high. The current four-roller painting The roll gap adjustment of the machine generally observes the scale with a handwheel dial, and then rotates the screw rod by rotating the handwheel, so that ...

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Problems solved by technology

[0002] The main purpose of the four-roller paint machine is to coat the surface of the workpiece with a uniform and equal thickness of paint film according to the technical requirements, and then perform performance testing on the coated film workpiece according to the inspection standard. It is a necessary special equipment for the paint industry before paint performance testing. , the thickness of the paint film is measured in microns when coating the film, and the accuracy of the thickness is mainly achieved by the gap between the upper rubber roller and the lower rubber roller. The roll gap adjustment of the machine generally uses the handwheel dial to observe the scale, and then rotate the handwheel to drive the screw to rotate, so that the two-end bearing brackets that fix the upper rubber roller move up and down, and drive the upper rubber roller to also move up and down, thereby adjusting the upper roller. , and the gap between the lower rubber rollers. Although this method theoretically changes the gap between the two rollers by only 0.00238mm every time a scale is adjusted, in actual use, due to the cooperation of mechanical parts such as screw rods and bearings, there are Gaps, dust or wear, etc., cause uncertain factors in the measurement accuracy, so it is difficult to make the accuracy of the actual coating film reach the theoretical accuracy; if the feeler gauge is used to accurately adjust the gap, it is feasible for rigid rollers, but for The elastic rubber roller has different deformation of the roller surface due to the pressure change when the roller surface and the feeler gauge are in contact, so it is impossible to measure the accurate value

Moreover, the above two methods are to manually adjust the roll gap, and this manual adjustment will cause deviations due to the mistakes of the eyes and hands in each operation.

Although there is also a device for automatically adjusting the gap through the electrical signal generated by the illumination imaging image on the CCD, the accuracy of the image on the CCD is not only related to the CCD, but also largely depends on the illumination and the image mirror. This method is very easy. The middle tone of the image transition is generated at the edge of the image; in order to clear the image, the light intensity must be moderate, and the brightness of the light cannot be increased excessively in order to increase the signal contrast, and there are some problems such as large space distance requirements during installation.

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