| 摘要 |
<p>A thermoforming machine utilizes two clamping frames (A,B) to advance cut sheets through heating and forming stations (14,16), with the clamping frames (A,B) returned via an overhead path above the oven (28,30) in the heating station (14). Pneumatic cylinders arranged about the inner perimeter of the frames (A,B) are operated to grip the sheet and release the sheets, which are pressurized and released via fluid connections established when the frames (A,B) are lifted from a transfer bar structure at the loading and forming stations (12,16). The clamping frames (A,B) have pivoted end sections which are engaged by extendible gear posts at the forming station to bend the clamped sheet into greater conformity with the tooling shape prior to forming. <IMAGE></p> |
