| 摘要 |
<p>PURPOSE:To efficiently produce a propelling pipe having high strength without wasting a molding material by arranging a tubular spacer to the inner peripheral surface of the end part of a cylindrical retaining mold and laminating the molding material on the inner peripheral surface of the rotating retaining mold and the spacer so as to obtain a predetermined inner diameter. CONSTITUTION:A cylindrical spacer 56 is attached to the inner peripheral surface of the end part of a retaining mold 51 and the molding material emitting port provided to the leading end part of a material supply pipe 55 is opposed to the part adjacent to the spacer 56 at the end part on the remote side of the material supply device 54 in the retaining mold 51 to rotate the retaining mold 51 by respective drive rollers 52. A molding material 57 is supplied into the material supply pipe 55 from the material supply device 54 to be emitted to the inner peripheral surface of the retaining mold 51 and the material supply pipe 55 is moved from one end part of the retaining mold 51 to the other end part thereof to laminate the molding material. The laminated molding material becomes thin by the thickness of the spacer to be formed into the insert port of a pipe main body 11.</p> |
