High-quality casting device and method for thick aluminum part

Abstract

The high-quality casting device for producing a thick aluminum part includes: a mold having a movable mold and a fixed mold coming into close contact with each other to form a cavity; a platen having a movable platen on which the movable mold is mounted and a fixed platen on which the fixed mold is mounted; an upper tie bar and a lower tie bar connected to the platen; a high-pressure squeeze platen connected to the upper tie bar and the lower tie bar; a squeeze pressurizer located on the high-pressure squeeze platen to pressurize a molten metal filled into the cavity; a sprue adapted to pour the molten metal into the cavity of the mold; a pouring ladle attached to the mold to pour the molten metal into the sprue; and a casting extractor located on one side of the mold to extract the casting solidified inside the cavity.

What is claimed is: 
     
         1 . A high-quality casting device for producing a thick aluminum part, the casting device comprising:
 a mold having a movable mold and a fixed mold coming into close contact with each other to form a cavity;   a platen having a movable platen on which the movable mold is mounted and a fixed platen on which the fixed mold is mounted;   an upper tie bar and a lower tie bar connected to upper and lower portions of the platen;   a high-pressure squeeze platen connected to the upper tie bar and the lower tie bar in such a way as to be spaced apart from the fixed platen by a given distance;   a squeeze pressurizer located on the high-pressure squeeze platen to pressurize a molten metal filled into the cavity;   a sprue adapted to pour the molten metal into the cavity of the mold;   a pouring ladle attached to the mold to pour the molten metal into the sprue; and   a casting extractor located on one side of the mold to extract the casting solidified inside the cavity.   
     
     
         2 . The casting device according to  claim 1 , wherein the squeeze pressurizer comprises:
 a squeeze pressurization cylinder fitted to the high-pressure squeeze platen to generate a pressurizing force;   a squeeze plunger moving forwards and backwards with the pressurizing force received from the squeeze pressurization cylinder to pressurize the molten metal filled into the cavity; and   a squeeze plunger bush fitted to the fixed platen to guide the squeeze plunger.   
     
     
         3 . The casting device according to  claim 1 , further comprising a sprue closer located on the fixed mold or the movable mold to open and close the sprue. 
     
     
         4 . The casting device according to  claim 3 , wherein the sprue closer comprises:
 a sprue closing cylinder located on the fixed mold or the movable mold to generate a pressurizing force; and   a sprue closing pin moving forwards and backwards with the pressurizing force received from the sprue closing cylinder to open and close the sprue.   
     
     
         5 . A high-quality casting method for producing a thick aluminum part, the casting method comprising the steps of:
 pouring a molten metal in a pouring ladle connected to a mold;   filling the molten metal poured into the pouring ladle into a cavity of the mold preheated;   closing the entrance of a sprue through a sprue closer after the filling of the molten metal into the cavity of the mold has been completed;   if given set time passes after the entrance of the sprue has been closed, performing squeeze pressurization against the molten metal by means of a squeeze pressurizer;   cooling, solidifying, and molding the molten metal by means of a cooling channel inside the mold;   if given set molding time passes, opening the mold and extracting a casting from the mold; and   spraying a release agent into the surface of the mold after the casting has been extracted.   
     
     
         6 . The casting method according to  claim 5 , wherein the step of pouring the molten metal into the cavity is performed with either a tilting method for filling the molten metal using the pouring ladle attached to the mold or a method for directly pouring the molten metal into the cavity of the mold. 
     
     
         7 . The casting method according to  claim 5 , wherein in the step of performing squeeze pressurization, an amount of squeeze pressurization is greater than or equal to 6% of a volume of the casting.