Patent ID: 7140863

Claim:
A molding tool for producing a container ( 9 ) having both a base ( 30 ) and pinched edge, leg, ( 31 ) from a heated thermoplastic plastic film ( 3 ) through deep drawing, the tool comprising, an upper tool part ( 10 ) having a compressed-air supply; a lower tool part ( 11 ) having at least one blank punch ( 22 ) which has an axis and an interior surface and shaping parts, defining a cavity which has a perimeter and corresponds to the shape of the container ( 9 ) to be produced, wherein the interior surface has a shoulder ( 27 ) that extends inwardly around the perimeter and then continues in an enlarged diameter region ( 28 ), which enlargement region corresponds at least to the thickness of a wall ( 29 ) of the standing base ( 30 ), so that an undercut having a pinched edge ( 31 ) can be formed, disposed within the blank punch ( 22 ); an axially displaceable mold floor ( 33 ) for the lower tool part ( 11 ), which mold floor ( 33 ) receives a water flow via one or more bores ( 34 ) and connects to an axial displaceable rod ( 32 ) containing the bores ( 34 ), and the blank punch ( 22 ), and moveable between a first lowered position and a raised position above the pinched edge ( 31 ) by the axial displaceable rod ( 32 ); an axially displaceable sealing bell ( 35 ), surrounding the periphery of the mold floor ( 33 ), and having the surface capable of cooperating with the shoulder ( 27 ) when in a first raised position to form the container pinched edge, leg ( 31 ); a drive in operational connection with the sealing bell ( 35 ) for separate displacement of the sealing bell ( 35 ) relative to the mold floor ( 33 ).