A detection unit of a web die-cutting machine with an online negative pressure suction conveying device

Abstract

The invention discloses a detection unit for an online negative pressure air suction conveying device of a roll paper die-cutting machine belt. The detection unit comprises the conveying device, negative pressure cavity boxes, a foldable negative pressure cavity box, a sliding device of the foldable negative pressure cavity box and a belt supporting frame. The negative pressure cavity boxes and the foldable negative pressure cavity box are arranged on the lower face of a conveyor belt and the foldable negative pressure cavity box can slide, stretch and retract in one negative pressure cavity box. A negative pressure cavity panel is arranged on the negative pressure cavity boxes and the foldable negative pressure cavity box. The negative pressure cavity boxes are fixed to a rack, the foldable negative pressure cavity box is fixed to the sliding device, and the sliding device is connected with a cylinder. The negative pressure cavity boxes and the foldable negative pressure cavity box are provided with connectors and connected with an exhaust fan. The belt supporting frame is a mesh type frame arranged on the negative pressure cavity panel. A dust removal device and a connection device can be additionally arranged on the detection unit. Products can be stably and accurately conveyed to a detection device through the negative pressure air suction conveying device.

Description

technical field [0001] The invention relates to a detection unit of a roll paper die-cutting machine, in particular to an online negative pressure suction conveying device for fixing the paper on a belt during the process of transporting the cigarette packaging box paper on the roll paper die-cutting machine to an online quality detection device , and a detection unit with the device. Background technique [0002] Web die-cutting machine and web die-cutting technology have been more and more widely used in the packaging and printing industry. Web die-cutting machine is mainly composed of three parts: unwinding part, die-cutting part and rewinding part. The unwinding part is mainly to feed paper for the die-cutting machine, the die-cutting part is to cut the printed paper into single finished products, and the winding part is mainly to collect and organize the die-cut products. The die-cut products need to be transported to the online quality inspection device of the web di...

AI Technical Summary

Problems solved by technology

[0003] The conveying belt used by the existing web die-cutting machine generally just places the product on the conveying belt during the process of conveying the die-cut product, and conveys the product to the next process through the friction between the product and the belt. position, but because the product is easily shifted on the belt due to air resistance during high-speed conveying

When the web die-cutting machine has an online quality inspection function, when the image detection unit camera takes pictures of the product, even a slight movement of the product relative to the conveyor belt will cause deviations in image collection, which will eventually lead to detection errors. Therefore, the high-precision and stable delivery of finished products is a necessary condition for the die-cutting machine to achieve online quality inspection

[0004] At present, the existing negative pressure suction conveying device mainly has the following three problems: First, the negative pressure cavity surface is narrow, which cannot be adapted to wide-format belts, and cannot meet the needs of wide-format belt conveying for web die-cutting machines. The existing negative pressure suction devices are mostly used for narrow-width belt conveying of single-row products; the second is to increase the width of the negative pressure cavity according to the existing negative pressure suction devices to meet the requirements of the roll paper mold. The wide-format belt of the cutting machine is required to detect multiple rows of online products. However, as the negative pressure increases, the belt is likely to bend downward due to the wide width of the belt. The smaller the suction force is, the smaller the negative pressure will be, which will lead to uneven negative pressure on the entire belt, which will affect the high-precision and stable delivery of the tested product by the belt; the third is to smoothly transport the product after the die-cutting process in the previous process to the negative pressure. On the suction belt, the negative pressure suction belt must be as close as possible to the paper output position of the die cutter roller of the processing unit in the previous process. The existing suction negative pressure belt device cannot be moved, which is not convenient for maintenance and disassembly of the die cutter roller and replace

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