Tiefziehverfahren und Tiefziehvorrichtung

摘要

A contoured part is deep drawn from synthetic film (1) which is made up of two components (1a) joined along a seam (17) with a flanged joint (17a). The seam (17) runs along the contour of the component in a predetermined line. Also claimed is the process and appts. for drawing the component films into a slot to form a T-shaped fold which is then compressed by projections in the tool to form a joint. Pref. the films (1a) are provisionally joined by a seam (1b) which can be a butt, lap or flanged joint. The film is then drawn into a gap between the tool sides (6) to form a fold with the provisional seam (1b) somewhere near the bottom (13a) of the fold. The tool sides (6) are then brought together so that an accurately placed seam (17) is formed between projections on the tool sides (6). The sides (6) are then moved apart to allow the tubular fold (18) to be withdrawn. It can either be trimmed off or remain to form an anchor when the deep drawn part is filled with rigid foam. The joints can be made through heating by contact, hot air, high frequency, ultrasonically or with adhesives.