JPS6451928A - Manufacture of coated pipe - Google Patents

Abstract

PURPOSE:To facilitate mass production by simplifying manufacture of a coated pipe and to eliminate also generation of a crack on the coated pipe by improving heat resistance, heat insulation and strength of the obtained coated pipe, by a method wherein cloth or a mat comprised of an organic fiber or an artificial mineral fiber is wound round an external circumferential surface part of a turning synthetic resin pipe while moving in a horizontal direction continuously by feeding a hydrate of a cement material on the same. CONSTITUTION:1 is bobbin round which a mat A comprised, for example, of a glass fiber is wound and the mat is sent out by a guide roller 2b provided on the upper position of a receiving tank 3 and a pair of a top and bottom ringer rollers 4 by passing through a guide roller 2a. Meanwhile, a slurry 6 is caused to flow down with a feed device 5 for a cement material hydrate provided on the upper part of the receiving tank 3 and fed to the mat extending over the whole of the upper surface. The slurry 6 is smoothed evenly with the ringer roller 4 and the slurry 6 is stuck to the upper surface of the mat by containing into the mat, which is made a coating material A'. The same is wound continuously round an external circumferential surface of a synthetic resin pipe 7 turning in the direction of an arrow.