Casting device for a vacuum-assisted pressure die casting system, vacuum-assisted pressure die casting system, and method for operating the vacuum-assisted pressure die casting system

Abstract

A casting device ( 01 ) for a vacuum-assisted pressure die casting system includes a casting chamber ( 10 ), which has a wall surface ( 11 ), and a plunger ( 20 ) configured to move longitudinally in the casting chamber ( 10 ) and completing the casting chamber ( 10 ) at a first end ( 12 ), the casting chamber ( 10 ) comprising a filling hole ( 14 ), the casting chamber ( 10 ) having a gate ( 16 ) at a second end ( 13 ) opposite the first end, the gate ( 16 ) being at an end face, wherein at least one suction groove ( 17 ) is disposed tangentially in the inner side of the wall surface ( 11 ) at least in sections, and at least one suction hole ( 18 ) being disposed in the suction groove ( 17 ). Furthermore, a vacuum-assisted pressure die casting system including at least one casting device ( 01 ) and a method for operating a vacuum-assisted pressure die casting system are disclosed.

1 . A casting device ( 01 ) for a vacuum-assisted pressure die casting system, the casting device ( 01 ) comprising a casting chamber ( 10 ), which has a wall surface ( 11 ), and a plunger ( 20 ) configured to move longitudinally in the casting chamber ( 10 ) and completing the casting chamber ( 10 ) at a first end ( 12 ),
 the casting chamber ( 10 ) comprising a filling hole ( 14 ),   the casting chamber ( 10 ) comprising a gate ( 16 ) at a second end ( 13 ) opposite the first end, the gate ( 16 ) being preferably at an end face, wherein at least one suction groove ( 17 ) is disposed tangentially in the inner side of the wall surface ( 11 ) at least in sections, at least one suction hole ( 18 ) being disposed in the suction groove ( 17 ).   
     
     
         2 . The casting device ( 01 ) according to  claim 1 , wherein the suction groove ( 17 ) is disposed behind the filling hole ( 14 ). 
     
     
         3 . The casting device ( 01 ) according to  claim 1 , wherein an underpressure system or a vacuum pump is connected to the suction hole ( 18 ). 
     
     
         4 . The casting device ( 01 ) according to  claim 1 , wherein the suction groove ( 17 ) extends in part of the wall surface ( 11 ). 
     
     
         5 . The casting device ( 01 ) according to  claim 1 , wherein
 the suction groove ( 17 ) flattens out at the ends.   
     
     
         6 . The casting device ( 01 ) according to  claim 1 , wherein the filling hole ( 14 ) is disposed in the wall surface ( 11 ) of the casting chamber ( 10 ) in a third of the wall surface ( 11 ) adjacent to the first end. 
     
     
         7 . The casting device ( 01 ) according to  claim 6 , wherein the suction groove ( 17 ) is disposed in a first third of a section of the wall surface ( 11 ), the section extending from a rear edge ( 15 ) of the filling hole ( 14 ) to the second end ( 13 ) of the casting chamber ( 10 ). 
     
     
         8 . The casting device ( 01 ) according to  claim 1 , wherein the diameter of the filling hole ( 14 ) increases from an inner side to an outer side of the wall surface ( 11 ), and the suction groove ( 17 ) at least partially extends below the filling hole ( 14 ). 
     
     
         9 . The casting device ( 01 ) according to  claim 1 , wherein the suction groove ( 17 ) has a rectangular cross section. 
     
     
         10 . The casting device ( 01 ) according to  claim 1 , wherein the suction groove ( 17 ) or the suction hole ( 18 ) is disposed at a top of the casting chamber ( 10 ). 
     
     
         11 . The casting device ( 01 ) according to  claim 1 , wherein the casting device ( 01 ) comprises two to ten suction grooves ( 17 ), the suction grooves ( 17 ) being disposed one behind the other in the longitudinal direction. 
     
     
         12 . The casting device ( 01 ) according to  claim 11 , wherein the suction grooves ( 17 ) are disposed at a distance from each other, the distance between adjacent suction grooves ( 17 ) being smaller than a length of the plunger ( 20 ). 
     
     
         13 . The casting device ( 01 ) according to  claim 12 , wherein the distance is equal to the length of the plunger ( 20 ) minus the widths of the adjacent suction grooves ( 17 ). 
     
     
         14 . A vacuum-assisted pressure die casting system comprising at least one casting device ( 01 ) according to  claim 1 , a drive for driving the plunger ( 20 ), at least one pressure die casting tool, and at least one underpressure system or vacuum pump. 
     
     
         15 . A method for operating a vacuum-assisted pressure die casting system, the method comprising the following steps:
 a) providing a casting device ( 01 ) according to  claim 1 ; and   b) introducing a melt through the filling hole ( 14 ); and   c) moving the plunger ( 20 ) from the first end ( 12 ) to the second end ( 13 ) of the casting chamber ( 10 ), extracting a gas flowing along the sides of the plunger ( 20 ), evacuating a gas present in the pressure die casting tool, and introducing the melt into the pressure die casting tool.   
     
     
         16 . The method according to  claim 14 , wherein the extraction of a gas present in the casting chamber ( 10 ), a gas flowing into the casting chamber ( 10 ) or the gas flowing along the sides of the plunger ( 20 ) or the evacuation of the gas present in the pressure die casting tool takes place in step b).