The invention provides a supporting-unfolding device of a costume ironing
machine. The supporting-unfolding device comprises at least one telescopic type unfolding mechanism consisting of a cylinder control device, a steam guide
pipe, a mounting frame, a rod-free cylinder, a finger cylinder, a chuck and a
sizing rod, and further comprises an expansion type unfolding mechanism consisting of a sliding rod, a left rod mechanism and a right rod mechanism, wherein both the left rod mechanism and the right rod mechanism comprise cylinder seats,
piston type cylinders, mounting seats and
sizing rods which are mounted in parallel at certain interval; the supporting-unfolding device further comprises a splay unfolding mechanism including a mounting plate sheet, a
piston type cylinder, a gas guide
pipe, a transmission
assembly, a chuck and a supporting rod; the transmission
assembly comprises a transmission rack, a left rotating shaft, a right rotating shaft, a left shaft seat, a right shaft seat and a chuck mounting supporting rod; the supporting-unfolding device is also provided with a supporting-unfolding auxiliary positioning device which is a projection device or a
laser emitter group and is mounted above the supporting-unfolding device. The supporting-unfolding device has the characteristics of high
automation degree, accurate
sizing and high generality and can be used by replacing an ironing template; the production cost is lowered, and the production efficiency is improved.