An air pressure cushion type surface pressure film coating process and device

Abstract

The invention relates to an air cushion type surface pressure film coating process and a device, and belongs to the technical field of object surface coating. The air cushion type surface pressure film coating process adopts the technical scheme that an air pressure balancing plate (3) and a paint curing device (9) are arranged between a front roller (4) and a back roller (5), and a fan (22) is arranged on the air pressure balancing plate; high-pressure air is pressed on a film (2) which bypasses the lower surfaces of the front roller (4) and the back roller (5) through a hole in the air pressure balancing plate, and the space between the lower surface of the air pressure balancing plate and the film is filled with the high-pressure air so as to form a stressful air cushion (8), so that the surface pressure film coating is performed. The air cushion type surface pressure film coating process has the beneficial effects that cheap soft films, thin films and various fluffy mold films withpatterns and grains can be preferably used, the film coating effect is obviously increased, the coating effect is good, and the film using cost is low; automatic continuous feeding of new films, automatic film coating, automatic curing, automatic film uncovering and automatic continuous collection of old films are realized, and the quick efficient full-automatic operation is realized.

Description

technical field [0001] The invention relates to an air pressure cushion type surface pressure film coating process and device, belonging to the technical field of object surface coating. Background technique [0002] The characteristics of film-coating are that the application of film for film-coating, forced leveling, mirror finish, and more and more applications. The processing cost competition in the film coating processing market is fierce. There are more and more demands for film coating processing of various patterns and colors, and the requirements for film coating effects are getting higher and higher. Any flaws on the coating surface are unqualified; and for the cost of film coating processing, various patterns, patterns, and coating effects, the film for film coating and how to use it play a key role. Film coating technology. [0003] There are many types of membranes, the material properties are very different, and the price gap is large. The coating industry r...

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Problems solved by technology

[0004] But the existing pressure roller type film coating equipment, such as pressure roller type film coating varnish machine and other pressure roller type film coating equipment and the applicant's application on March 13, 2009, the invention patent that has been authorized : A method and device for coating and curing ultraviolet light-cured coatings, the patent number is: 200910119419.8; both use a cylindrical pressure roller as the film coating device, and can only use anti-slip, hard material thick film or film If the film is very thick, the overall stile coating of the film will not be deformed after the film is peeled off, and then the coating will be qualified and excellent, and the best effect will be competitive; Installation cost is too high

However, when coating with cheap soft material film, thin body film and fluffy mold film with various patterns and patterns, many defects will appear: wrinkles, micro-concave-convex phenomena, micro-bulges, wrinkled edges of the coating, and air formation Bubbles, air bubbles and other defects, resulting in the loss of residual coating waste

[0005] The reason is that there are outstanding disadvantages on the film-coating rollers, which cause when using cheap soft material films, thin body films and fluffy mold films with various patterns and textures for coating; The essence of the pressure roller is a cylindrical roller pressed on the film. The apex of the lower arc of the roller is a straight line, and there is a downward pressure on the film. The coating between the film and the coating surface is the stress concentration point. In the process of continuous roller pressing, it has the effect of rolling, calendering and stretching on the film, so that the soft material film, thin body film and various patterns and patterns are fluffy mold film. The force makes it deformed, and part of it becomes wrinkles; the film is floating on the surface of the liquid paint, and the paint under the film is liquid before it is cured and directly changes with the film; the paint is mostly polyester or resin, which is a viscous liquid like glue. There is a slight elastic swelling force of the liquid. After this line of pressure is pressed by the coating roller, the downward pressure moves away and suddenly disappears. The film, the paint layer and the coated object all have a slight swelling force and rebound upwards. In some cases, the tensile deformation of the film has local micro-retraction phenomenon, and the equipment itself is shaking; in addition, the liquid coating has a slight elastic expansion force and the rebound film stretches and swells; the position moves into wrinkles and small bumps Phenomenon, slightly floating and bulging; resulting in very poor coating surface effect and unqualified, while the film on the edge of the coating object during film coating is prone to wrinkles and wings entering the air, causing wrinkles, air foam, and bubbles, which are caused by ultraviolet light curing. Coating waste loss residual weight

Speeding up the film coating speed or thickening the film coating coating layer will make the above-mentioned defects of film coating more likely to occur, and the defects will be more serious

[0006] Pressure roller type lamination coating equipment, it is precisely because of this simple one-line pressure lamination coating working method, it cannot be used for colored paint lamination coating

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