| 摘要 |
The system is provided for producing integral openings in oriented pipes, with the possibility of adjusting and distributing the thicknesses of the opening as desired and allowing the customarily weaker areas to be strengthened without increasing production process times. Basically, it comprises a supporting body (1) and a runner (2) sliding axially inside the body (1) with its conical inner end (4) provided with heating means (6), furthermore comprising a sliding rod (8) for pushing the corresponding preform (11), said rod having a central axial hole (9) for the introduction of expansion and cooling fluid, whilst the sliding runner (2) has holes (7) for the entry of a lubricating fluid.
|
