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Plant for continuously drying a coated film

A coating film and equipment technology, applied in the film field of laminated products, can solve the problems that the lower air jet cannot be completely eliminated, increase the energy consumption for moving and heating the air, and increase the complexity of the equipment, etc.

Active Publication Date: 2013-10-23
NORDMECCANICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] Furthermore, it is readily understood that there must always be a minimum low pressure sufficient to counteract the weight of the same membrane and support it; therefore, the lower air jet can never completely eliminate
[0022] Therefore, if the lower part of the membrane does not require heating, or if this heating would cause damage to some materials, these units will have to have separate heating systems for both upper and lower air streams
[0023] This leads to increased energy consumption to move and heat the air and to increased equipment complexity

Method used

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  • Plant for continuously drying a coated film
  • Plant for continuously drying a coated film
  • Plant for continuously drying a coated film

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Embodiment Construction

[0037] Refer to attached figure 1 , figure 2 and FIG. 3 , an apparatus for continuous drying of coating films generally designated by reference numeral 1 , comprising a structure 2 defining a cavity 3 inside which coating film F to be dried is guided.

[0038] Said film F may for example be a film for laminates made of plastic, paper, aluminum or other material, said film being coated with a layer of material in which a certain percentage of volatiles contained must be removed from The material layer is evaporated, but the film can also be, for example, a laminated film consisting of multilayer films.

[0039] The cavity 3 has in particular a first open end 3a through which the film F enters and a second open end 3b through which the film exits after drying has been completed.

[0040] Whereas the structure 2 comprises a first upper part 4 and a second lower part 5 stacked on top of each other, the first upper part and the second lower part including the cavity 3 therebetwe...

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Abstract

The present invention relates to a plant for continuously drying a coated film comprising a cavity (3) with a first open end (3a) through which a film (F) enters and a second open end (3b) through which the dried film exits, a plurality of rollers (7) for supporting said film inside said cavity (3), a feed and extraction system (10) adapted to feed a flow of air to first blowing means (9), adapted to direct a flow of air onto the surface of the coated film (F), and to extract a flow of air from said cavity (3) through suction means (27, 28). It includes second blowing means (11) fed by said feed and extraction system (10), adapted to direct a flow of heated air onto the opposite surface of said film.

Description

technical field [0001] The invention relates to an apparatus for continuously drying coated films, especially films for laminates coated with an adhesive layer. Background technique [0002] Laminating film machines are generally manufactured using machines in which a first layer of film (for example made of plastic, paper, aluminum or the like) is combined with at least a second layer of film by uniformly applying Laminate with a thin layer of glue on one of the two layers described above. [0003] In many applications, these films are laminated with adhesives or adhesive mixtures containing a proportion of solvent such as ethyl acetate or similar. [0004] The task of this solvent is to reduce the viscosity of the adhesive in order to facilitate the application, which is carried out continuously on the film layer fed at high speed, often even up to 6-7 meters per second (m / s). [0005] However, once the adhesive has been applied to the surface of one of the two films, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B13/10
CPCF26B21/004F26B13/10F26B13/14
Inventor A·切尔切洛
Owner NORDMECCANICA