Kanshuhekinikanjikuhokonotsukoojusurugoseijushikannotanmenheisokuhoho

摘要

PURPOSE:To close securly an end of a pipe, by pressing a hot plate to the end of a synthetic resin pipe having longitudinally extending through-holes in the circumferential wall, and rotating the plate about the axis of the pipe to seal the through-holes with the melted resin. CONSTITUTION:The through-holes 2 formed in the synthetic resin pipe P and open to opposite ends of the pipe circumferential wall 1 extend longitudinally between an inner surface of pipe circumferential wall 1a and an outer surface 1b. The hot plate is pressed to the end of the pipe P, and is rotated gradually about the axis of the pipe in one direction to heat and melt the pipe end part so that the melted resin 21 is sealed into the through-holes 2 and at the same time the excess of the resin 21 projects from both the inner and outer peripheries of the pipe end part to form melted flashes 2c, 2d, and thereafter the hot plate is removed to form a slightly protruded part 2b. Then, a disk 5 having pairs of bits 6, 7 located at four equi-spaced positions along concentric circles having radii corresponding to the inner and outer radii of the pipe P is pressed to the pipe end part, and is rotated to cut off the flashes 2c, 2d by the cutting tools 6, 7.