Sprue System for a Diecasting Die

Abstract

A sprue system for a diecasting die includes at least one runner channel, which extends from an entry-side sprue mouth opening to an exit-side sprue opening, which opens into a die cavity of the diecasting die that is formed between a fixed die half and a movable die half or into a gate region arranged upstream thereof. The runner channel has a geometrically and/or thermally defined parting region upstream of the sprue opening and downstream of the sprue mouth opening. The runner channel has a bend or kink in the parting region and/or a heating device is assigned to a runner channel portion between the parting region and the exit-side sprue opening and/or a heating device is assigned to a runner channel portion adjoining the parting region upstream and narrowing conically toward the parting region and/or a region of the movable die half opposite the sprue opening has a cooling channel structure.

1 - 11 . (canceled) 
     
     
         12 . A sprue system for a diecasting die, comprising:
 at least one runner channel, which extends from an entry-side sprue mouth opening to an exit-side sprue opening, which opens into a die cavity of the diecasting die that is formed between a fixed die half and a movable die half or into a gate region arranged upstream thereof and comprises an at least one of geometrically and thermally defined parting region upstream of the sprue opening and downstream of the sprue mouth opening,   wherein the runner channel has a bend or kink in the parting region.   
     
     
         13 . The sprue system as claimed in  claim 12 , wherein the runner channel has in the parting region a constriction, from where its through-flow cross section increases downstream and/or upstream. 
     
     
         14 . The sprue system as claimed in  claim 12 , wherein the parting region is at a distance in front of the sprue opening of between 0.3 times and 3 times a diameter of the runner channel in the parting region. 
     
     
         15 . The sprue system as claimed in  claim 12 , wherein a runner channel portion between the parting region and the exit-side sprue opening is assigned a cooling channel structure. 
     
     
         16 . The sprue system as claimed in  claim 12 , wherein, in a region adjoining the parting region upstream, the runner channel runs at an angle of greater than 0° and less than or equal to 45° to the direction of a normal to a parting plane between the fixed die half and the movable die half, rising in the direction of the parting region. 
     
     
         17 . The sprue system as claimed in  claim 12 , wherein it is configured as a hot runner sprue system and comprises a melt manifold block, which on the entry side has the sprue mouth opening, and a sprue block, which adjoins the melt manifold block in the direction of flow and on the exit side has the sprue opening, wherein the parting region is located in a portion of the runner channel that runs in the sprue block. 
     
     
         18 . The sprue system as claimed in  claim 12 , wherein it is configured as a hot runner sprue system and the at least one runner channel comprises at least two runner channels that are parallel in terms of flow and temperature control means are provided, designed for controlling in an open-loop or closed-loop manner the temperature of the molten material in the parting regions of the runner channels independently of one another to a predeterminable setpoint temperature of between 0.9 times and 1.1 times a liquidus temperature of the molten material. 
     
     
         19 . The sprue system as claimed in  claim 18 , wherein the temperature control means comprise an open-loop temperature control unit or a closed-loop temperature control unit and, for the respective runner channel, at least one of a temperature sensor system between the parting region and the exit-side sprue opening, the heating device between the parting region and the exit-side sprue opening, the heating device in the runner channel portion adjoining the parting region upstream, the cooling channel structure in the region of the movable die half opposite the sprue opening, and the cooling channel structure between the parting region and the exit-side sprue opening. 
     
     
         20 . The sprue system as claimed in of  claim 12 , wherein the runner channel portion adjoining the parting region upstream and narrowing conically toward the parting region goes over at an associated transitional location into a cylindrical runner channel portion of a constant diameter adjoining upstream and its axial length is less than that of the runner channel portion between the parting region and the exit-side sprue opening. 
     
     
         21 . The sprue system as claimed in  claim 12 , wherein the region of the movable die half that is opposite the sprue opening has a recess or is formed as level. 
     
     
         22 . The sprue system as claimed in  claim 12 , wherein the runner channel portion extending from the parting region to the exit-side sprue opening branches into multiple channel branches that are parallel in terms of flow. 
     
     
         23 . A sprue system for a diecasting die, comprising
 at least one runner channel, which extends from an entry-side sprue mouth opening to an exit-side sprue opening, which opens into a die cavity of the diecasting die that is formed between a fixed die half and a movable die half or into a gate region arranged upstream thereof and comprises an at least one of geometrically and thermally defined parting region upstream of the sprue opening and downstream of the sprue mouth opening,   wherein at least one of a runner channel portion between the parting region and the exit-side sprue opening and a runner channel portion adjoining the parting region upstream and narrowing conically toward the parting region is assigned a heating device.   
     
     
         24 . The sprue system as claimed in  claim 23 , wherein the runner channel has in the parting region a constriction, from where its through-flow cross section increases downstream and/or upstream. 
     
     
         25 . The sprue system as claimed in  claim 23 , wherein the parting region is at a distance in front of the sprue opening of between 0.3 times and 3 times a diameter of the runner channel in the parting region. 
     
     
         26 . The sprue system as claimed in  claim 23 , wherein a runner channel portion between the parting region and the exit-side sprue opening is assigned a cooling channel structure. 
     
     
         27 . The sprue system as claimed in  claim 23 , wherein, in a region adjoining the parting region upstream, the runner channel runs at an angle of greater than 0° and less than or equal to 45° to the direction of a normal to a parting plane between the fixed die half and the movable die half, rising in the direction of the parting region. 
     
     
         28 . The sprue system as claimed in  claim 23 , wherein it is configured as a hot runner sprue system and comprises a melt manifold block, which on the entry side has the sprue mouth opening, and a sprue block, which adjoins the melt manifold block in the direction of flow and on the exit side has the sprue opening, wherein the parting region is located in a portion of the runner channel that runs in the sprue block. 
     
     
         29 . The sprue system as claimed in  claim 23 , wherein it is configured as a hot runner sprue system and the at least one runner channel comprises at least two runner channels that are parallel in terms of flow and temperature control means are provided, designed for controlling in an open-loop or closed-loop manner the temperature of the molten material in the parting regions of the runner channels independently of one another to a predeterminable setpoint temperature of between 0.9 times and 1.1 times a liquidus temperature of the molten material. 
     
     
         30 . The sprue system as claimed in  claim 29 , wherein the temperature control means comprise an open-loop temperature control unit or a closed-loop temperature control unit and, for the respective runner channel, at least one of a temperature sensor system between the parting region and the exit-side sprue opening, the heating device between the parting region and the exit-side sprue opening, the heating device in the runner channel portion adjoining the parting region upstream, the cooling channel structure in the region of the movable die half opposite the sprue opening, and the cooling channel structure between the parting region and the exit-side sprue opening. 
     
     
         31 . The sprue system as claimed in of  claim 23 , wherein the runner channel portion adjoining the parting region upstream and narrowing conically toward the parting region goes over at an associated transitional location into a cylindrical runner channel portion of a constant diameter adjoining upstream and its axial length is less than that of the runner channel portion between the parting region and the exit-side sprue opening. 
     
     
         32 . The sprue system as claimed in  claim 23 , wherein the region of the movable die half that is opposite the sprue opening has a recess or is formed as level. 
     
     
         33 . The sprue system as claimed in  claim 23 , wherein the runner channel portion extending from the parting region to the exit-side sprue opening branches into multiple channel branches that are parallel in terms of flow. 
     
     
         34 . A sprue system for a diecasting die, comprising
 at least one runner channel, which extends from an entry-side sprue mouth opening to an exit-side sprue opening, which opens into a die cavity of the diecasting die that is formed between a fixed die half and a movable die half or into a gate region arranged upstream thereof and comprises an at least one of geometrically and thermally defined parting region upstream of the sprue opening and downstream of the sprue mouth opening,   wherein a region of the movable die half opposite the sprue opening has a cooling channel structure.   
     
     
         35 . The sprue system as claimed in  claim 34 , wherein the runner channel has in the parting region a constriction, from where its through-flow cross section increases downstream and/or upstream. 
     
     
         36 . The sprue system as claimed in  claim 34 , wherein the parting region is at a distance in front of the sprue opening of between 0.3 times and 3 times a diameter of the runner channel in the parting region. 
     
     
         37 . The sprue system as claimed in  claim 34 , wherein a runner channel portion between the parting region and the exit-side sprue opening is assigned a cooling channel structure. 
     
     
         38 . The sprue system as claimed in  claim 34 , wherein, in a region adjoining the parting region upstream, the runner channel runs at an angle of greater than 0° and less than or equal to 45° to the direction of a normal to a parting plane between the fixed die half and the movable die half, rising in the direction of the parting region. 
     
     
         39 . The sprue system as claimed in  claim 34 , wherein it is configured as a hot runner sprue system and comprises a melt manifold block, which on the entry side has the sprue mouth opening, and a sprue block, which adjoins the melt manifold block in the direction of flow and on the exit side has the sprue opening, wherein the parting region is located in a portion of the runner channel that runs in the sprue block. 
     
     
         40 . The sprue system as claimed in  claim 34 , wherein it is configured as a hot runner sprue system and the at least one runner channel comprises at least two runner channels that are parallel in terms of flow and temperature control means are provided, designed for controlling in an open-loop or closed-loop manner the temperature of the molten material in the parting regions of the runner channels independently of one another to a predeterminable setpoint temperature of between 0.9 times and 1.1 times a liquidus temperature of the molten material. 
     
     
         41 . The sprue system as claimed in  claim 40 , wherein the temperature control means comprise an open-loop temperature control unit or a closed-loop temperature control unit and, for the respective runner channel, at least one of a temperature sensor system between the parting region and the exit-side sprue opening, the heating device between the parting region and the exit-side sprue opening, the heating device in the runner channel portion adjoining the parting region upstream, the cooling channel structure in the region of the movable die half opposite the sprue opening, and the cooling channel structure between the parting region and the exit-side sprue opening. 
     
     
         42 . The sprue system as claimed in of  claim 34 , wherein the runner channel portion adjoining the parting region upstream and narrowing conically toward the parting region goes over at an associated transitional location into a cylindrical runner channel portion of a constant diameter adjoining upstream and its axial length is less than that of the runner channel portion between the parting region and the exit-side sprue opening. 
     
     
         43 . The sprue system as claimed in  claim 34 , wherein the region of the movable die half that is opposite the sprue opening has a recess or is formed as level. 
     
     
         44 . The sprue system as claimed in  claim 34 , wherein the runner channel portion extending from the parting region to the exit-side sprue opening branches into multiple channel branches that are parallel in terms of flow.