| 摘要 |
<p>A method and means for bending pipe and other hollow bodies into arcuate shape while restraining collapsing tendencies of the walls by supporting the pipe internally on a close-fitting, crush-resistant flexible arbor, and expanding the arbor size by applying pressurized fluid within an annular deformable chamber or within flexible tubing wound helically about the periphery of the arbor. When bending thermo-plastic pipe which previously has been heated to above the deformation temperature in the areas to be deformed, circulating pressurized fluid also serves as a heat exchanger, hastening the cooling process.</p> |
