Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – With stretching or tensioning means
Patent
1998-12-15
2000-12-26
Sells, James
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
With stretching or tensioning means
156555, 156582, B32B 3100
Patent
active
061643580
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to equipment for manufacturing a laminated metal sheet, which can effect high speed production of the laminated metal sheet and reduce bubbles generated in high speed lamination.
BACKGROUND OF THE INVENTION
In the field of containers for foods and beverages, laminated metal sheets which are formed by laminating a resin film to a metal sheet have been used in place of the conventional plated steel sheets and coated aluminum sheets. So far, methods for manufacturing these laminated metal sheets have been known (Japanese Patent Laid-open Publication No. Hei-4-201237, for example). They are excellent in the respect that they use no solvent and no ovens for baking finish, differently from the case of manufacturing coated metal cans.
The laminated metal sheets for containers use should satisfy various requirements, for example, good adhesion of a film to a metal sheet endurable to press-forming, deep drawing, ironing, or the like when they are formed into cans and no disfigurement of the surfaces thereof so that the resin film can be free from damages during forming. In this regard, therefore, generation of bubbles in the laminated metal sheet is undesirable because the adhesion between the resin film and the metal sheet is decreased, the surface of the laminated metal sheet is roughened, which easily causes the surface to suffer damages during forming, and further the appearance of the laminated metal sheet is degraded, all due to the bubbles. Therefore, efforts have been made toward preventing the generation of bubbles in the laminated metal sheet when it is manufactured.
Today, as the demand for the laminated metal sheets increases, it is more required to increase lamination speed for the purpose of improving the productivity thereof. However, when the lamination speed is simply increased, a great quantity of bubbles generate, which is the reason why the lamination speed is so far limited.
DISCLOSURE OF THE INVENTION
It is therefore an object of the present invention to solve the problem described above and provide equipment for manufacturing a laminated metal sheet, which eliminates bubbles even in high speed lamination of 200 m/min. or more and is excellent in productivity.
To achieve the above mentioned object, the equipment for manufacturing a laminated metal sheet according to the present invention includes a support roll disposed on a contacting side of a resin film with a lamination roll such that the support roll is projected beyond a straight line between the lamination roll and a film roll so as to impart tension to the film when the film is fed to the lamination rolls from the film roll.
Further, it is also that a support roll is disposed on a contacting side of a resin film with a metal sheet such that the support roll is projected beyond a straight line between a lamination roll and a film roll so as to impart tension to the film.
In addition, it is also that a first support roll for imparting tension to a film is disposed on a contacting side of a resin film with a lamination roll such that the first support roll is projected beyond a straight line between the lamination roll and a film roll and a second support roll is disposed on a contacting side of the resin film with a metal sheet such that the second support roll is projected toward the side reverse to the projecting side of the first support roll. Otherwise, it is also preferable that a first support roll is disposed on the contacting side of the resin film with the metal sheet such that the first support roll is projected beyond the straight line between the lamination roll and the film roll and a second support roll is disposed on the contacting side of the resin film with the lamination roll such that the second support roll is projected toward the side reverse to the projecting side of the first support roll.
Furthermore, the equipment for manufacturing a laminated metal sheet according to the present invention includes a support roll disposed adjacently before the lamination
REFERENCES:
patent: 4610747 (1986-09-01), Bregenzer
patent: 4778557 (1988-10-01), Schimer
patent: 5071504 (1991-12-01), Singer
patent: 5198063 (1993-03-01), Howard et al.
patent: 5283017 (1994-02-01), Rohleder et al.
patent: 5429696 (1995-07-01), Rohleder et al.
patent: 5503705 (1996-04-01), Rohleder et al.
patent: 5679200 (1997-10-01), Newcomb et al.
patent: 5716472 (1998-02-01), Rossetti
Kaguma Noriaki
Sakamoto Yoshiki
Tanaka Atsuo
Sells James
Toyo Kohan Co. Ltd.
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