Recoiling facility for magnesium alloy sheets

Abstract

A recoiling facility for a magnesium alloy sheet is provided with: an unwinder which is able to unwind a coil material formed by winding magnesium alloy onto a fixed mandrel; a heating furnace which heats to a predetermined temperature the magnesium alloy sheet which has been unwound from the coil material; a trimmer which trims both side edges of the sheet; and a winder which rewinds the magnesium alloy sheet. According to the present invention, it is possible to rewind a coil material formed by winding a magnesium alloy sheet onto a fixed mandrel and remove the fixed mandrel, and to perform leveling and trimming on crack portions and shape defect portions in width end portions of a plate that have been generated by multi-pass rolling so as to manufacture a high-quality product coil.

1 . A recoiling facility for a magnesium alloy sheet comprising:
 an unwinder which is able to unwind a coil material formed by winding magnesium alloy onto a fixed mandrel;   a heating furnace which is located on the downstream side of the unwinder and which heats the magnesium alloy sheet which has been unwound from the coil material to a predetermined temperature;   a trimmer which is located on the downstream side of the heating furnace and which trims both side edges of the magnesium alloy sheet; and   a winder which is located on the downstream side of the trimmer and which rewinds the magnesium alloy sheet.   
     
     
         2 . The recoiling facility for a magnesium alloy sheet according to  claim 1 , wherein there is further provided a scrap borer which is located on the downstream side of the trimmer and on the upstream side of the winder, and onto which is wound scrap trimmed from the two side edges of the magnesium alloy sheet. 
     
     
         3 . The recoiling facility for a magnesium alloy sheet according to  claim 1 , wherein there is further provided a leveler which is located on the downstream side of the heating furnace and on the upstream side of the trimmer, and which corrects any shape defects in the magnesium alloy sheet. 
     
     
         4 . The recoiling facility for a magnesium alloy sheet according to  claim 1 , wherein the winder rewinds the magnesium alloy sheet without using a fixed mandrel. 
     
     
         5 . The recoiling facility for a magnesium alloy sheet according to  claim 2 , wherein there is further provided a leveler which is located on the downstream side of the heating furnace and on the upstream side of the trimmer, and which corrects any shape defects in the magnesium alloy sheet.