Patent ID: 6023956
Filing Date: 2000-02-15
Classification: B21D

Abstract:
Apparatus (1) for bending a hollow section (2) having a leg to be bent for manufacturing a hollow spacer frame, filled during or after bending with drying agent, for insulating glass sheets, the apparatus comprising a guide and holding device (3) arranged approximately in a feed direction of the hollow section (2) for grasping a section area (5) of the hollow section situated before a bending area (4), a bending tool (11) for grasping and swivelling the leg (12) of the hollow section (2) to be bent, and an abutment (13) for fixing an inner side of a resulting bend, and having a tool movable on an outer side of the bending area (4) under contact pressure relative to the abutment (13) and the hollow section (2) and at least one of pressable on the outer side of the hollow section (2) and dipping between side bands (6) of the hollow section (2), impinging upon at least one part of the section situated on the outer side of the bending area, wherein a support (16) is provided for at least a portion of one side band (6) of the hollow section (2), and parallel thereto a hold-down clamp (17) is provided for at least a portion of the other side band (6) of the hollow section (2), and a distance between the hold-down clamp (17) and the support (16) corresponds approximately to a width of the hollow section (2) and thereby to a clearance between two glass sheets to be held apart, the hold-down clamp (17) is subdivided into rotatable and stationary elements (171, 172), the rotatable element (171) of the hold-down clamp situated in the bending area (4) is rotatable in a bending direction at least approximately around a bending angle about a rotation axis (18) arranged one of approximately through a neutral axis of the hollow section (2) to be bent or displaced radially toward the interior of the bend, and the stationary element (172) of the hold-down clamp is situated before the rotatable element (171) in the feed direction of the hollow section (2) and is mounted in a stationary position.