METHOD FOR MANUFACTURING HOLLOW BODY FROM MULTILAYER SHEET AND MANUFACTURING SYSTEM

摘要

Provided are a manufacturing method and a manufacturing system for a hollow body in which adequate bonding strength can be obtained even when using multilayer sheets and draw-down during heating can be limited. A hollow body obtained from multilayer sheets is manufactured using multiple steps including: a high-inside-temperature double-sided heating step for disposing a pair of multilayer sheets next to each other so as to face each other in the vertical direction and heating from the outside using a first heat source while heating from the inside using a second heat source at a higher temperature than the first heat source; a one-sided heating step for heating only from the outside using the first heat source or a double-sided heating step for heating from the outside using the first heat source and heating from the inside using the second heat source at a temperature at or below the first heat source; and a molding step for molding the pair of multilayer sheets that has passed through the high-inside-temperature double-sided heating step and the one-sided heating step or the double-sided heating step.