Method and device for uphill casting, comprising a chill or core stackings with an open pouring gate

Abstract

A method for uphill/low-pressure casting, especially of light metal alloys, with a casting table having a flow-through opening, with a casting furnace lying below the casting table with a riser pipe forming an upwardly open mouth opening, with a mould having a base plate which has a downwardly open pouring-in opening; the mouth opening is positioned against the flow-through opening in a sealing fashion from below, the mould is brought with its pouring-in opening over the flow-through opening, melt is conveyed from the casting furnace via the riser pipe into the mould until it is filled, the mould is displaced horizontally on the casting furnace with open melt-filled communication between the casting furnace and the mould until the pouring-in opening is closed by the casting table below and the flow-through opening is closed by the base plate above, the melt is allowed to drop in the riser pipe as far as below the mouth opening.

1 . A method for uphill/low-pressure casting, especially of light metal alloys, with a casting table having a flow-through opening, 
 with a casting furnace lying below the casting table with a riser pipe forming an upwardly open mouth opening,    with a mould having a base plate which has a downwardly open pouring-in opening;    the mouth opening is positioned against the flow-through opening in a sealing fashion from below,    the mould is brought with its pouring-in opening over the flow-through opening,    the melt is conveyed from the casting furnace via the riser pipe into the mould until it is filled,    the mould is displaced horizontally on the casting table with open melt-filled communication between the casting furnace and the mould until the pouring-in opening is closed by the casting table below and the flow-through opening is closed by the base plate above,    the melt is allowed to drop in the riser pipe as far as below the mouth opening.    
     
     
         2 . The method for uphill/low-pressure casting, especially of light metal alloys, with a casting table having a flow-through opening, 
 with a casting furnace lying below the casting table with a riser pipe forming an upwardly open mouth opening,    with a mould having a base plate which has a downwardly open pouring-in opening,    the mouth opening is positioned against the flow-through opening in a sealing fashion from below,    the mould is brought with its pouring-in opening over the flow-through opening,    melt is conveyed from the casting furnace via the riser pipe into the mould until it is filled,    the mould is left in this position until the casting has solidified,    the melt is allowed to drop in the riser pipe as far as below the mouth opening,    the mould is displaced horizontally on the casting table with its flow-through opening emptied of melt, until the pouring-in opening is closed by the casting table below and the mouth opening is closed by the base plate above.    
     
     
         3 . The method according to one of claims  1  and  2 , wherein the mould is in each case placed on the casting table from above so that the flow-through opening or the mouth opening is in open communication with the pouring-in opening.  
     
     
         4 . The method according to one of claims  1  and  2 , wherein the mould is in each case transferred horizontally over the casting table so that the flow-through opening or the mouth opening is in open communication with the pouring-in opening.  
     
     
         5 . The method according to one of  claims 1  to  4 , wherein during the uphill casting and the displacement of the mould, the mould is held under pre-pressure against the casting table or the riser pipe.  
     
     
         6 . The method according to one of  claims 1  to  5 , wherein during the uphill casting and the displacement of the mould, the riser pipe is held under pre-pressure against the casting table or the base plate of the mould.  
     
     
         7 . The method according to one of claims  1  or  3  to  6 , wherein after the displacement of the mould, the mould is held in a position in which the casting table is cooled under the pouring-in opening.  
     
     
         8 . The method according to one of claims  1  or  3  to  7 , wherein during displacement of the mould, the mould together with the pouring-in opening is guided over a section of the casting table which is cooled.  
     
     
         9 . The method according to one of  claims 1  to  8 , wherein two moulds are alternately mounted on a base plate with two pouring-in openings, cast and demoulded, wherein the base plate alternately with the pouring-in openings is displaced over the flow-through opening or onto the mouth opening.  
     
     
         10 . The method according to one of  claims 1  to  8 , wherein a plurality of moulds are sequentially mounted on a base plate with a ring of pouring-in openings, cast and demoulded, wherein the base plate is turned in a carousel fashion with the pouring-in openings over the flow-through opening or the mouth opening.  
     
     
         11 . An apparatus for uphill casting/low-pressure casting, especially for casting light metal alloys, with a casting table with a flow-through opening, 
 with a casting furnace lying below the casting table with a riser pipe, forming an upwardly open mouth opening,    with a mould with a base plate having a downwardly open pouring-in opening;    the mouth opening is positioned against the flow-through opening in a sealing fashion from below,    the mould is positioned with its pouring-in opening against the flow-through opening from above,    characterised by means for horizontal displacement of the mould on the casting table and means for simultaneously maintaining a positive pre-pressure of the mould base plate towards the casting table.    
     
     
         12 . The apparatus according to  claim 11 , 
 characterised in 
 that the mould has coolant above a non-cooled sprue region.  
   
     
     
         13 . The apparatus according to one of claims  11  or  12 , characterised by horizontal rails or sets of rollers secured elastically to the casting table which act on fixed horizontal edges or rails of the mould to press the mould on the casting table during displacement.  
     
     
         14 . The apparatus according to one of claims  11  or  12 , characterised by horizontal rails or sets of rollers arranged elastically on the mould which interact with horizontal edges or rails arranged securely on the casting table to press the mould on the casting table.  
     
     
         15 . The apparatus according to one of  claims 11  to  14 , characterised by means for pressing the riser pipe on the casting table or the mould.  
     
     
         16 . The apparatus according to  claim 15 , characterised by a riser pipe suspended elastically in the casting furnace and height adjustment means for the casting furnace.  
     
     
         17 . The apparatus according to one of  claims 11  to  16 , characterised by two moulds placed on a common base plate with two pouring-in openings, especially permanent moulds, as well as means of displacement for alternating displacement of the base plate.  
     
     
         18 . The apparatus according to one of  claims 11  to  16 , characterised by a plurality of moulds placed on a common base plate with a ring of pouring-in openings, especially permanent moulds, as well as rotating drive means for rotating drive of the base plate.