Single-trough and dual-roll secondary coating structure

Abstract

The invention discloses a single-trough and dual-roll secondary coating structure. The single-trough and dual-roll secondary coating structure comprises a first coating mechanism and a second coating mechanism; the first coating mechanism comprises a first net roll; the second coating mechanism comprises a second net roll; and defoaming rubber rolls are installed and matched with the first net roll and the second net roll, and part of the deforming rubber rolls are soaked into coating materials of a material trough. The single-trough and dual-roll secondary coating structure is simple in structure, convenient to use, and capable of reducing energy consumption, saving materials, reducing waste and avoiding the quality problems of coating bubbles, poor interlayer bonding, color flooding and the like.

Description

technical field [0001] The invention belongs to the field of coating, and in particular relates to a single-groove double-roller secondary coating structure. Background technique [0002] Coating technology is widely used in the coating of substrates such as paper and film and composite packaging. At present, many domestic printing and packaging machinery enterprises use coating lamination equipment, the coating types and squeegee methods are relatively single, and the application of coating technology is also greatly restricted. [0003] At present, the gravure coating machine solves the problem of multiple coatings mainly through two methods. One is to perform two coatings on the same coating machine, which is very inefficient and wastes electric energy and materials; The first coating is carried out on one coating machine, and the second coating is two identical but independent units. This coating structure consumes more power, and the equipment is longer, and the substr...

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Problems solved by technology

The glue viscosity is high and easy to transfer, if it is too thin, it will flow easily, making the glue uneven, and it is easy to produce vertical or horizontal water lines

Therefore, once the types of coated anilox rollers and glue are determined, it is difficult to adjust the amount of coating, which is the main reason why the application of anilox rollers is limited.

[0005] At present, the improvement of the coating effect is mainly achieved by two or more coatings, but the problems of low efficiency and high energy consumption have always been concerned by people; it is mainly through the normal screen roll coating method as follows figure 1 As shown, the coating method is relatively simple. When the substrate passes through the mesh roller, the substrate and the mesh roller are bonded together by the pressure of the rubber roller. , the coating amount and coating leveling of this coating method are mainly determined by the mesh roll parameters and coating performance. When the product requirements are high, it can be achieved by secondary coating or multiple coatings.

At present, multiple coating is a simple copy of this coating method. The coating machine is set long enough to complete the storage of multiple coating units, and an oven is set in the middle to complete multiple coatings. This coating method consumes a lot of energy , large material loss, inconvenient operation, and prone to quality problems such as air bubbles, weak bonding between layers, and flooding

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