| 摘要 |
PCT No. PCT/DE90/00264 Sec. 371 Date Feb. 8, 1991 Sec. 102(e) Date Feb. 8, 1991 PCT Filed Apr. 4, 1990 PCT Pub. No. WO90/11882 PCT Pub. Date Oct. 18, 1990.An apparatus for bending a laminated thermoplastic sheet without displacing the lamina relative to one another includes a clamp which functions to hold the sheet during the bending procedure. A support is disposed adjacent the clamp and has a curved surface for forming a bend in the sheet and a flat surface which constitutes an abutment for the part of the sheet being bent. The support is adjustable to vary the angle of bending. A bending device for the sheet comprises a carriage having a bending roller, and a ram whose size approximates that of the flat abutment surface. The sheet is clamped with a portion thereof projecting freely above the flat abutment surface and heated. The bending roller thereupon forces the sheet against the curved surface to bend the sheet and then moves across the projecting portion of the sheet to urge such portion into engagement with the flat abutment surface. Once the roller has completed its travel across the projecting portion of the sheet, the ram is applied to the projecting portion and holds it against the flat abutment surface until the sheet is cooled. The carriage is guided in a track having two sections of which one is parallel to and adjustable with the support. |
