Patent Number: 6,250,910

Title: Thermoforming tool

Abstract: A thermoforming tool employed for wrap-around lamination of a sheet to at least one edge (3) of a molding (2) loosely resting on the tool's lower half. The tool comprises a sheet-stretching frame (4) that is positioned over the molding and lowers a thermally plasticized sheet (5) tensioned therein at its edges into a holding position below the edge of the molding, a device for sealing the sheet off from the lower half of the tool, and a device for applying a suction in the subsequent lamination process. The suction device includes an evacuatable depression (9) in the lower half of the tool and below the edge of the molding. The object is to provide smoother lamination. The lower half (1) of the tool has a sealing lip (8) at the level of a conceptual plane below the edge of the molding. The lip parallels the edge of the molding and demarcates the depression. The sheet is applied against and stretched over the lip by a plunger (7) that descends between the lip and the sheet-stretching frame into a lowermost position. The face of the plunger parallels the top of the edge of the molding. Once it is in its lowermost position, the plunger is subject to a return stroke to a position approximately at the level of the conceptual plane of the edge of the molding.

Inventors: Nimmergut; Edgar (White Lake, MI), Lause; Jurgen (Hasbergen, DE)

Assignee: Fritsche Moellmann, GmbH & Co. KG

International Classification: B29C 51/16 (20060101); B29C 51/00 (20060101); B29C 63/04 (20060101); B29C 63/02 (20060101); B29C 51/04 (20060101); B29C 51/10 (20060101); B29C 053/00 ()

Expiration Date: 06/26/2018