Abstract: An apparatus and method for trimming a contoured non-round workpiece includes a torch for flame treating or trimming the workpiece by impinging a flame on the workpiece, a holding member for supporting the workpiece, the holding member being rotatably mounted relative to the torch, and a control member for cooperating the holding member with the torch so that the torch follows the contour of the workpiece when the holding member is rotated relative to the torch. The control member generates an electronic image of the workpiece and guides the torch along the contour of the workpiece in accordance with the image.

Abstract: A trimming apparatus for trimming blow molded plastic workpieces includes a torch for heat trimming the workpiece; a turntable for supporting the workpiece, rotatably mounted relative to the torch; and a cam for guiding the torch, the cam cooperating the turntable with the torch so that the torch follows a contour of the workpiece when the turntable is rotated relative to the torch. The cam is preferably disposed on the turntable and in registry with the workpiece, and has a contour selected according to the contour of a surface of the workpiece to be trimmed so as to properly position the torch relative to the surface of the workpiece to be trimmed.