| 摘要 |
PURPOSE:To get rid of breakage of a core mold, by making the mandrel the predetermined outer diameter till the material forming part and reducing the diameter of the further part to the tip at the composite tube manufacturing apparatus wherein the core mold is formed around the peripheral face of the mandrel and the forming material is attached to its outer periphery. CONSTITUTION:The core mold 3 is formed by winding the belt like thick sheet of paper 2 applied with the adhesive spirally and partly being overlapped on the mandrel 1. The core mold 3 is wound twistedly by the endless belt 4 and moved to the direction of its tip, being driven by rotation of the belt. After the forming material 6 of which the reinforcing material of the glass fiber etc. is impregnated with thermosetting resin is wound on the core mold 3 at the material forming part 5, the forming material 6 is hardened by the hardening apparatus 10. In such a composite tube manufacturing apparatus is used the mandrel 1 of which the outside diameter till the material forming part is made the predetermined size, and the diameter of the further part to its tip is reduced. |
