Hybrid chill with enhanced heat transfer

Abstract

A hybrid chill with enhanced heat transfer for casting of a sand cast aluminum engine block of a vehicle is provided. The hybrid chill comprises a base comprising an outer wall having a first side and a second side. Each of the first and second sides extends from a first longitudinal end to an opposite second longitudinal end. The outer wall is closed to define a hollow portion. The base further comprises a heat transfer fluid in a liquid phase disposed in the hollow portion. The heat transfer fluid has a boiling point of between 320° C. and 400° C. at 1 bar for enhanced heat transfer during casting. The chill further comprises a plurality of crankcase members. Each member is disposed on the first side. Each member is spaced apart from a respective adjacent member defining an open recess.

1 . A hybrid chill with enhanced heat transfer for casting of a sand cast aluminum part of a vehicle, the hybrid chill comprising:
 a base comprising an outer wall having a first side and a second side opposite the first side, each of the first and second sides extending from a first longitudinal end to an opposite second longitudinal end and along a first lateral end and a second lateral end opposite the first lateral end, the outer wall being closed to define a hollow portion, the base further comprising a heat transfer fluid in a liquid phase disposed in the hollow portion, the heat transfer fluid having a boiling point of between 320° Celsius (° C.) and 400° C. at 1 bar for enhanced heat transfer during casting; and   a plurality of crankcase members, each member disposed on the first side and extending from the first lateral end to the second lateral end of the outer wall, each member being parallel to and spaced apart from a respective adjacent member defining an open recess extending between adjacent members from the first lateral end to the second lateral end,   wherein the outer wall is gray iron comprising 2.8 to 2.9 weight percent (wt %) carbon (C), 1.2 to 1.3 wt % silicon (Si), 0.9 to 1.1 wt % manganese (Mn), less than 0.15 wt % phosphorus (P), and less than 0.12 wt % sulfur (S),   wherein at least one crankcase member comprises an inner cavity formed therein and in fluid communication with the hollow portion of the body, the inner cavity comprising heat transfer fluid for increased heat transfer,   wherein the inner cavity of the at least one crankcase member is formed by the outer wall having an inner surface, the inner surface having peaks and valleys defining an open region between each respective peak for enhanced heat transfer.   
     
     
         2 - 5 . (canceled) 
     
     
         6 . The chill of  claim 1  where the second side of the base comprises a plurality of fins formed thereacross from the first lateral end to the second lateral end, each fin being spaced apart from a respective adjacent fin to define an open portion extending between adjacent fins from the first lateral end to the second lateral end for enhanced heat transfer. 
     
     
         7 . The chill of  claim 1  wherein the heat transfer fluid is a silicon-based heat transfer fluid in the liquid phase. 
     
     
         8 . The chill of  claim 1  wherein the heat transfer fluid is a silicon-based heat transfer fluid comprising polydimethylsiloxane. 
     
     
         9 . A hybrid chill with enhanced heat transfer for casting of a sand cast aluminum engine block of a vehicle, the hybrid chill comprising:
 a base comprising an outer wall having a first side and a second side opposite the first side, each of the first and second sides extending from a first longitudinal end to an opposite second longitudinal end and along a first lateral end and a second lateral end opposite the first lateral end, the outer wall being closed to define a hollow portion, the base further comprising a silicon-based heat transfer fluid in a liquid phase disposed in the hollow portion, the heat transfer fluid having a boiling point of between 320° Celsius (° C.) and 400° C. at 1 bar for enhanced heat transfer during casting, and   a plurality of crankcase members, each member disposed on the first side and extending from the first lateral end to the second lateral end of the outer wall, each member being parallel to and spaced apart from a respective adjacent member defining an open recess extending between adjacent members from the first lateral end to the second lateral end,   wherein the outer wall is gray iron comprising 2.8 to 2.9 weight percent (wt %) carbon (C), 1.2 to 1.3 wt % silicon (Si), 0.9 to 1.1 wt % manganese (Mn), less than 0.15 wt % phosphorus (P), and less than 0.12 wt % sulfur (S),   wherein at least one crankcase member comprises an inner cavity formed therein and in fluid communication with the hollow portion of the body, the inner cavity comprising heat transfer fluid for increased heat transfer,   wherein the inner cavity of the at least one crankcase member is formed by the outer wall having an inner surface, the inner surface having peaks and valleys defining an open region between each respective peak for enhanced heat transfer.   
     
     
         10 - 12 . (canceled) 
     
     
         13 . The chill of  claim 9  where the second side of the base comprises a plurality of fins formed thereacross from the first lateral end to the second lateral end, each fin being spaced apart from a respective adjacent fin to define an open portion extending between adjacent fins from the first lateral end to the second lateral end for enhanced heat transfer. 
     
     
         14 . The chill of  claim 1  wherein the heat transfer fluid is a silicon-based heat transfer fluid comprising polydimethylsiloxane. 
     
     
         15 . A hybrid chill with enhanced heat transfer for casting of a sand cast aluminum engine block of a vehicle, the hybrid chill comprising:
 a base comprising an outer wall having a first side and a second side opposite the first side, each of the first and second sides extending from a first longitudinal end to an opposite second longitudinal end and along a first lateral end and a second lateral end opposite the first lateral end, the outer wall being closed to define a hollow portion, the base further comprising a heat transfer fluid in a liquid phase disposed in the hollow portion, the heat transfer fluid having a boiling point of between 320° C. and 400° C. at 1 bar for enhanced heat transfer during casting, the heat transfer fluid being a silicon-based heat transfer fluid comprising polydimethylsiloxane; and   a plurality of crankcase members, each member disposed on the first side and extending from the first lateral end to the second lateral end of the outer wall, each member being parallel to and spaced apart from a respective adjacent member defining an open recess extending between adjacent members from the first lateral end to the second lateral end,   wherein the outer wall is gray iron comprising 2.8 to 2.9 weight percent (wt %) carbon (C), 1.2 to 1.3 wt % silicon (Si), 0.9 to 1.1 wt % manganese (Mn), less than 0.15 wt % phosphorus (P), and less than 0.12 wt % sulfur (S),   wherein at least one crankcase member comprises an inner cavity formed therein and in fluid communication with the hollow portion of the body, the inner cavity comprising heat transfer fluid for increased heat transfer,   wherein the inner cavity of the at least one crankcase member is formed by the outer wall having an inner surface, the inner surface having peaks and valleys defining an open region between each respective peak for enhanced heat transfer.   
     
     
         16 - 19 . (canceled) 
     
     
         20 . The chill of  claim 15  where the second side of the base comprises a plurality of fins formed thereacross from the first lateral end to the second lateral end, each fin being spaced apart from a respective adjacent fin to define an open portion extending between adjacent fins from the first lateral end to the second lateral end for enhanced heat transfer.