SKG series automatic belling machine, equipped with feeding, hauling-off unit and corresponding program joint, they are suitable for using both connection line of extrusion pipe and single machine. It adopts hot air cycling and double heating, each heating furnace equipped with multi-eating core, molding type adopts belling pipe head inner molding and outer baric molding, ensure the exactness of pipe belling size. On its control panel, there is a transfer switch of expanding solvent type pipe socket (Straight socket) and expanding seal ring type pipe socket(R socket). As the R socket has the ways of swelling part expanded fore-and-aft respectively, and it's very convenient to choose the pipe belling styles and its technology has high adaptation. All main components adopting imported components ensures system running steadily.