Process of producing composite sheet and structure of the same

Abstract

A process of producing composite sheet is presented, and the process comprises the steps of: (a) providing a plurality of metallic sheets; (b) bonding the metallic sheets with one another; and(c) finishing the bonded composite sheet that has a plurality of metallic layers. In comparison to conventional single type/solid piece of building material, the present invention results in a dramatic cost reduction in various building industry. With the up-to-date technology, the strength of metallic composite sheet remains within structural grade parameter and meets related specifications. Manufacturers are benefited from the cheaper metallic sheet in the composition while enjoying the same quality look of the outer layer. Furthermore, a structure of the composite sheet is also presented in the present invention.

1 . A process of producing a composite sheet, comprising the steps of:
 (a) providing a plurality of metallic sheets;   (b) bonding the metallic sheets with one another; and   (c) finishing the bonded composite sheet having a plurality of metallic layers.   
   
   
       2 . The process of producing the composite sheet as claimed in  claim 1 , wherein the metallic sheets are coiled or uncoiled around a coiling roller group before bonding the plurality of the metallic sheets with one another. 
   
   
       3 . The process of producing the composite sheet as claimed in  claim 1 , wherein the metallic sheets are passed through a stretching roller group before bonding the metallic sheets, and the stretching roller group extends, stretches, and flattens the metallic sheets. 
   
   
       4 . The process of producing the composite sheet as claimed in  claim 1 , wherein the metallic sheets have top and bottom contact surfaces, a plurality of adhesive films are placed on the contact surfaces of one of the metallic sheets before bonding the plurality of the metallic sheets with one another, and the adhesive films are heated by a set of heating rollers to become adhesives, and the adhesives are bonding layers of the composite sheet. 
   
   
       5 . The process of producing the composite sheet as claimed in  claim 1 , wherein the metallic sheets have contact surfaces, a plurality of adhesives are coated on the contact surfaces of one of the metallic sheets by singular or multiple adhesive applying units before bonding the plurality of the metallic sheets with one another, and the adhesives are bonding layers of the composite sheet. 
   
   
       6 . The process of producing the composite sheet as claimed in  claim 1 , wherein the plurality of the metallic sheets are passed through a forming roller group after one of the metallic sheets out of the plurality of metallic sheets has formed the bonding layers, the forming roller group presses the metallic sheets to contact with the bonding layers respectively, and the plurality of metallic sheets bond with each other via the bonding layers. 
   
   
       7 . The process of producing the composite sheet as claimed in  claim 6 , wherein the forming roller group includes a pair of first forming rollers with different vertical positions, a pair of second forming rollers with different vertical positions, and a pair of third forming rollers with different vertical positions, therein the radius of each third forming rollers is longer than the radius of each second forming rollers, and the radius of each second forming roller is longer than the radius of each first forming roller, the metallic sheets are pressed by the first forming rollers, the second forming rollers, and the third forming rollers in sequence. 
   
   
       8 . The process of producing the composite sheet as claimed in  claim 1 , wherein the metallic sheets are deformed by a beating tool, a punching tool, or a roller group to become flexuous sheets, and each flexuous sheet has a plurality of first base portions, a plurality of second base portions, and a plurality of bending portion, the bending portions are connected between the first base portions and the second base portions, the vertical position of each first base portion is different from the vertical position of each second base portion, forming a square wave shape. 
   
   
       9 - 21 . (canceled)