Forming tool for forming hollowware or sheet metal using a pressurized gas or fluid

Abstract

The invention relates to a tool for shaping hollow parts or metal sheets with the aid of a pressurized gas or fluid. Said shaping tool comprises at least two contour blocks which form a cavity. At least one of the contour blocks can be heated. The contour blocks ( 20, 25; 120, 125 ) are disposed in a two-piece tool housing ( 1 ) which is provided with insulation ( 10 ) for the contour blocks ( 20, 25; 120, 125 ). The load distribution plate ( 8,9 ) is connected to the tool housing ( 1 ).

1 . A forming tool for forming hollowware or sheet metal using a pressurized gas or fluid, including at least two contour blocks forming a cavity, at least one of the contour blocks being heatable,
 characterized in that said contour blocks ( 20 ,  25 ;  120 ,  125 ) are disposed in a two-part tool housing ( 1 ), said two-part housing comprising an insulation ( 10 ) for said contour blocks ( 20 ,  25 ;  120 ,  125 ), the load distribution plate ( 8 ,  9 ) being connected to said tool housing.   
     
     
         2 . The forming tool as set forth in  claim 1 ,
 characterized in that the load distribution plate ( 8 ,  9 ) is a constituent part of the contour block.   
     
     
         3 . The forming tool as set forth in  claim 2 ,
 characterized in that the means ( 8 ,  9 ) for distributing the load is a load distribution plate spanning the surface of the insulation ( 10 ).   
     
     
         4 . The forming tool as set forth in  claim 2 ,
 characterized in that the load distribution plate ( 8 ,  9 ) is disposed as an independent element in the tool housing ( 1 ) so as to abut the insulation ( 10 ) almost with its entire surface, said load distribution plate ( 8 ,  9 ) comprising means ( 11 ,  15 ) for holding the contour block ( 20 ,  25 ;  120 ,  125 ).   
     
     
         5 . The forming tool as set forth in  claim 1 ,
 characterized in that the load distribution plate ( 8 ,  9 ) is orientable in the tool housing ( 1 ).   
     
     
         6 . The forming tool as set forth in  claim 1 ,
 characterized in that the load distribution plate ( 8 ,  9 ) is adapted for fixation in the corresponding housing half.   
     
     
         7 . The forming tool as set forth in  claim 1 ,
 characterized in that the one contour block ( 20 ,  120 ) is float mounted in the load distribution plate ( 8 ).   
     
     
         8 . The forming tool as set forth in  claim 1 ,
 characterized in that the contour block ( 20 ,  25 ;  120 ,  125 ) comprises heating means.   
     
     
         9 . The forming tool as set forth in  claim 8 ,
 characterized in that the heating means are configured to be panel heaters ( 60 ).   
     
     
         10 . The forming tool as set forth in  claim 9 ,
 characterized in that the panel heaters ( 60 ) are connected to the contour block ( 20 ,  25 ;  120 ,  125 ) for the purpose of realizing a good heat transfer.   
     
     
         11 . The forming tool as set forth in  claim 8 ,
 characterized in that the contour block ( 20 ,  25 ;  120 ,  125 ) comprises openings ( 30 ) for receiving rod-shaped heaters.   
     
     
         12 . The forming tool as set forth in  claim 1 ,
 characterized in that the insulation ( 10 ) comprises several horizontally running layers of different density and temperature resistance.   
     
     
         13 . The forming tool as set forth in  claim 1 ,
 characterized in that the insulation ( 10 ) comprises supports ( 12 ) extending transverse to the plane separating the contour blocks.   
     
     
         14 . The forming tool as set forth in  claim 1 ,
 characterized in that the contour blocks ( 20 ,  25 ;  120 ,  125 ) comprise openings ( 18 ) for passing dies therethrough and bringing them to the hollowware ( 50 ).   
     
     
         15 . The forming tool as set forth in  claim 1 ,
 characterized in that the contour blocks ( 20 ,  25 ;  120 ,  125 ) comprise centering means ( 24 ,  29 ) with respect to each other in the region of their separation plane.   
     
     
         16 . The forming tool as set forth in  claim 15 ,
 characterized in that the centering means includes a nose ( 24 ) disposed on the one contour block, said nose corresponding to a recess ( 29 ) on the other contour block.   
     
     
         17 . The forming tool as set forth in  claim 16 ,
 characterized in that the nose ( 24 ) and the mating recess ( 29 ) comprise an insertion surface inclined at about 20°.   
     
     
         18 . The forming tool as set forth in  claim 16 ,
 characterized in that the nose ( 24 ) and the mating recess ( 29 ) are disposed over the circumference except for the opening ( 18 ) for the dies.   
     
     
         19 . The forming tool as set forth in  claim 1 ,
 characterized in that the board or the sheet metal ( 100 ) are clamped by the contour blocks ( 20 ,  25 ;  120 ,  125 ).   
     
     
         20 . The forming tool as set forth in  claim 19 ,
 characterized in that the one contour block ( 120 ) comprises a female part ( 122 ) that is displaceable onto the other contour block ( 125 ) and forms a part of the cavity.   
     
     
         21 . The forming tool as set forth in  claim 20 ,
 characterized in that the displaceable female part ( 122 ) comprises a forming die ( 130 ) that communicates with a piston and cylinder mechanism.   
     
     
         22 . The forming tool as set forth in  claim 19 ,
 characterized in that the other contour block ( 125 ) comprises a female part ( 126 ) forming a part of the cavity, said female part being configured to be the negative of the female part ( 122 ) of the one contour block ( 120 ).