Patent ID: 6773248
Filing Date: 2004-08-10
Classification: B31F

Abstract:
A molding device for molding an inner portion of a paper pipe comprises:a molding head, an annular seat disposed on the molding head, an oil supply tube inserted through the annular seat and inserted in the molding head, a rotating device connected to the oil supply tube, and an oil pipe connected to the rotating device, the molding head having a center hole, a plurality of threaded apertures, an annular guide groove, a plurality of round holes communicating with the annular guide groove, a plurality of expanders, a plurality of expander receiving grooves, and a plurality of shafts, each of the expanders inserted in the corresponding expander receiving groove of the molding head, each of the shafts having a recess, and each of the shafts inserted through the corresponding round hole of the molding head.