| 摘要 |
The present invention pertains to an apparatus to shape the interior surface (8) of a pipe (9) made of thermoplastic material, said apparatus comprising a shaping component (1). According to the invention, the surface (3) of this shaping component (1) ha s at least one notch (4) and at least one smooth continuous surface area. In particular, th e shaping component (1) has at least partially a cylindrical shape and/or at least partially a conical shape. The notch or notches (4) can run spirally or closed and can either extend over the entire length of the shaping component (1) or can only be located along a specific length of the shaping component (1). The notch or notches (4) can be connected to a pressure system to produce vacuum and/or positive pressure in the notch (4). This facilitates the improved feeding and gliding of the interior surface (8) of the pipe (9) at the shaping component (1). The present invention also pertains to a system to manufactur e pipes (9) made of thermoplastic material, said system comprising an above apparatus to shape the interior surface (8) of a pipe (9) made of thermoplastic material. |
