▎ 摘　　要

NOVELTY - The utility model relates to the field of fixing shaft of film winding drum, claims a gas expansion shaft and graphene electro-thermal film production system, the gas expansion shaft is used for winding and unwinding of graphene electro-thermal film production; the gas expansion shaft comprises a hollow shaft, a support saddle set at two ends of the hollow shaft and a pneumatic telescopic key set on the hollow shaft; two ends of the hollow shaft is provided with a sealing plate, so as to form a sealed air pressure cabin in the hollow shaft, the air pressure cabin is connected with the air pressure telescopic key, and the air pressure telescopic key is extended/shortened by filling/extracting air into the air pressure cabin, so as to allow the air pressure telescopic key to connect/disengage the graphene electric heating film sleeved on the hollow shaft. The utility model solves the problem that the existing graphene electro-thermal film production line adopts manual tension and loosening mechanical mechanism to release graphene electro-thermal film wound roll, the working procedure is fussy, the working intensity is large, resulting in labour consumption is large, working time, so as to restrict the production efficiency of the graphene electro-thermal film. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a graphene electro-thermal film production system.