Control method of fixed-point coating machine and fixed-point coating machine

Abstract

The embodiment of the invention provides a control method for a fixed-point coating machine and the fixed-point coating machine. The method comprises the following steps: after a base material of a first unwinding shaft is released and a base material of a second unwinding shaft is spliced with a base material in the coating machine, if the condition that the base material of the second unwindingshaft reaches a glue spreading roll is acquired by judgment, starting to capture a color code on the base material, and recording a first current rotating angle of the glue spreading roll while the color code is captured; comparing the first current rotating angle with a reference rotating angle to obtain a target error, and quickly adjusting a rotating angle of the glue spreading roll and / or a traction roll according to the target error. According to the embodiment of the invention, after reel alternation of the fixed-point coating machine, a glue spreading point of the glue spreading roll isenabled to be matched with a printing pattern on the base material by acquiring the target error and adjusting the rotating angle of the glue spreading roll and / or the traction roll according to thetarget error, so that pattern failure can be quickly and efficiently eliminated without stopping for reel alternation or manual calibration, the rejection rate is reduced and the production efficiencyis improved.

Description

technical field [0001] The embodiments of the present invention relate to the field of coating production, and more specifically, relate to a control method of a fixed-point coating machine and a fixed-point coating machine. Background technique [0002] The coating machine is mainly used for the surface coating process production of film, paper, etc. The equipment is to coat the rolled substrate with a layer of glue, paint or ink with specific functions, and then wind it up after drying. The fixed-point coating means that there is a printed pattern on the substrate itself, and the machine needs to paint at a fixed position of the pattern. The substrate unwinding mechanism of the coating machine is divided into two types: single station and double station according to the structure. Among them, single station refers to: the machine has only one unwinding shaft to drive the base material roll; after the roll is unloaded, the machine stops, the operator manually replaces the...

AI Technical Summary

Problems solved by technology

In the coating machine in the prior art, its double-station unwinding structure is only suitable for conventional coating operations that do not require fixed points; when performing fixed-point coating, due to the deviation of the pattern position on the A-axis and B-axis material rolls, the cutting After switching rolls, the pattern position of the new roll does not coincide with the coating position

In order to solve this problem, the existing technology usually adopts the method of manual calibration, but the calibration efficiency and calibration accuracy of this method are low

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