THERMAL TRANSFER ROLL FOR MANUFACTURE OF LAMINATE PLATE, METHOD OF HEATING METALLIC SHEET BY MEANS OF THERMAL TRANSFER ROLL, AND LAMINATE PLATE MANUFACTURING APPARATUS PROVIDED WITH THERMAL TRANSFER ROLL

摘要

When a heat transfer pattern comprising a plurality of recesses is formed on a surface of a roll to provide a thermal transfer roll, a metallic sheet is heated by the thermal transfer roll to form a laminate plate and an integral drum-bottom type can is made of the laminate plate, ring-shaped scratches due to thermal strain are produced on portions of the can which face the recesses of the laminate plate. Bubbles are liable to be formed on the scratches, so that corrosion resistance around the bubbles is degraded. The invention has its object to provide a thermal transfer roll free from such scratches. In the invention, a conventional thermal transfer roll having a plurality of recesses formed in a surface thereof is covered by a thin metallic sleeve (130) over a substantially entire surface thereof. Alternatively, the recesses (106) are closed by a cover body (132). While spaces in the recesses serve as heat resistance to form a similar heat transfer pattern to a conventional one, a surface of the roll is made flat to prevent scratches from being produced on a laminate plate.