Method and mould for stratified moulding with metalostatic pressure compensation

Abstract

A mould for stratified moulding with metalostatic pressure compensation formed by one or more stackable moulds formed by a tapping cavity of a generally rhomboidal truncated cone shape and one or more moulding cavities connected to the tapping cavity by one or more supply conduits; in such a way that each tapping cavity of each stackable mould interconnects to form a central filling collector, and each tapping cavity compensates for the metalostatic pressure of the molten metal as it is drained by the central filling collector to achieve generally uniform filling of each of the moulding cavities of each of the stackable moulds. In addition, the generally rhomboidal double truncated cone shape serves to keep a temperature distribution in the mould during the pouring of molten metal.

1 . A mould for stratified moulding with metalostatic pressure compensation consisting of one or more stackable moulds, characterized in that each stackable mould includes:
 a tapping cavity of a generally rhomboidal double truncated cone shape; and   one or more moulding cavities connected to said tapping cavity by one or more supply conduits;   wherein each tapping cavity of each stackable mould is interconnected to form a central filling collector and wherein each tapping cavity allows metalostatic pressure compensation of the molten metal during its draining by said central filling collector, so that a generally uniform filling is accomplished of each said moulding cavities of each said stackable moulds.   
     
     
         2 . The mould for stratified moulding of  claim 1 , characterized in that each stackable mould is formed by a portion of upper mould and a portion of lower mould assembled to define said tapping cavity and said moulding cavities. 
     
     
         3 . The mould for stratified moulding of  claim 1 , characterized in that said tapping cavity includes:
 an upper cavity in the form of a truncated cone with a smaller base and a larger base; and   a lower cavity in the form of a truncated cone with a smaller base and a larger base; and   wherein said upper cavity and said lower cavity are opposite between each other and are joined at their respective larger base.   
     
     
         4 . The mould for stratified moulding of  claim 3 , characterized in that the lower base of said upper cavity is smaller than the smaller base of said lower cavity. 
     
     
         5 . The mould for stratified moulding of  claim 3 , characterized in that the larger base of said upper cavity is smaller than the larger base of said lower cavity. 
     
     
         6 . The mould for stratified moulding of  claim 3 , characterized in that said lower cavity allows decreasing the metalostatic pressure during the draining of molten metal through said central filling collector by feeding the contractions that may be formed in said moulding cavities and thus eliminate mould shrinkage. 
     
     
         7 . The mould for stratified moulding of  claim 3 , characterized in that said upper cavity allows increasing the metalostatic pressure during the draining of molten metal through said central filling collector, by feeding the contractions that may be formed in said moulding cavities and thus eliminate mould shrinkage. 
     
     
         8 . The mould for stratified moulding of  claim 3 , characterized in that said upper cavity has a shape selected from a group consisting of a bell-shaped form, a truncated pyramid shape, a spherical segment with two bases, or combinations thereof. 
     
     
         9 . The mould for stratified moulding of  claim 3 , characterized in that said lower cavity has a shape selected from a group consisting of a bell-shaped form, a truncated pyramid shape, a spherical segment with two bases, or combinations thereof. 
     
     
         10 . The mould for stratified moulding of  claim 1 , characterized in that further includes a draining cup located at the upper portion of said mould and connected to said central filling collector. 
     
     
         11 . The mould for stratified moulding of  claim 10 , characterized in that said draining cup has a shape selected from a group consisting of a bell-shaped form, a truncated pyramid shape, a spherical segment with two bases, or combinations thereof. 
     
     
         12 . The mould for stratified moulding of  claim 1 , characterized in that further includes a flow stabilizer located at the lower portion of said mould and connected to said central filling collector. 
     
     
         13 . The mould for stratified moulding of  claim 12 , characterized in that said flow stabilizer has a shape selected from a group consisting of a bell-shaped form, a truncated pyramid shape, a spherical segment with one base, a spherical segment with two bases, or combinations thereof. 
     
     
         14 . The mould for stratified moulding of  claim 1 , characterized in that said tapping cavity allows the formation of hot spots during the draining of molten metal through said central filling collector to achieve a temperature distribution in said mould. 
     
     
         15 . A stackable mould characterized by comprising:
 a tapping cavity of a generally rhomboidal double truncated cone shape; and   one or more moulding cavities connected to said tapping cavity by one or more supply conduits;   wherein each tapping cavity allows metalostatic pressure compensation of the molten metal during its draining in order to achieve a generally uniform filling is accomplished of each of said moulding cavities.   
     
     
         16 . The stackable mould of  claim 15 , characterized in that it is formed by a portion of upper mould and a portion of lower mould assembled to define said tapping cavity and said moulding cavities. 
     
     
         17 . The stackable mould of  claim 15 , characterized in that said tapping cavity includes:
 an upper cavity in the form of a truncated cone with a smaller base and a larger base; and   a lower cavity in the form of a truncated cone with a smaller base and a larger base; and   wherein said upper cavity and said lower cavity are opposite between each other and are joined at their respective larger base.   
     
     
         18 . The stackable mould of  claim 17 , characterized in that the lower base of said upper cavity is smaller than the smaller base of said lower cavity. 
     
     
         19 . The stackable mould of  claim 17 , characterized in that the larger base of said upper cavity is smaller than the larger base of said lower cavity. 
     
     
         20 . The stackable mould of  claim 17 , characterized in that said lower cavity allows decreasing the metalostatic pressure during the draining of molten metal through said central filling collector by feeding the contractions that may be formed in said moulding cavities and thus eliminate mould shrinkage. 
     
     
         21 . The stackable mould of  claim 17 , characterized in that said upper cavity allows increasing the metalostatic pressure during the draining of molten metal through said central filling collector, by feeding the contractions that may be formed in said moulding cavities and thus eliminate mould shrinkage. 
     
     
         22 . The stackable mould of  claim 17 , characterized in that said upper cavity has a shape selected from a group consisting of a bell-shaped form, a truncated pyramid shape, a spherical segment with two bases, or combinations thereof. 
     
     
         23 . The stackable mould of  claim 17 , characterized in that said lower cavity has a shape selected from a group consisting of a bell-shaped form, a truncated pyramid shape, a spherical segment with two bases, or combinations thereof. 
     
     
         24 . The stackable mould of  claim 15 , characterized in that said tapping cavity allows the formation of hot spots during the draining of molten metal to achieve a temperature distribution in said mould. 
     
     
         25 . A method for stratified moulding with metalostatic pressure compensation, said method is characterized by comprising the steps of:
 (a) forming a mould for stratified moulding from a plurality of stackable moulds arranged one on top of the other in a vertical column, wherein each stackable mould includes:
 a tapping cavity of a generally rhomboidal double truncated cone shape; and 
 one or more moulding cavities connected to said tapping cavity by one or more supply conduits; 
 wherein the stackable moulds are arranged so that their respective tapping cavities are located one on top of the other to form a central filling collector; and 
   (b) pouring the molten metal in said central filling collector so that the molten metal flows through each tapping cavity and starts filling the moulding cavities from the lower stackable mould up to the upper stackable mould; wherein each tapping cavity allows compensating the metalostatic pressure of the molten metal when it is drained to achieve a generally uniform filling of each of said moulding cavity of each stackable mould.   
     
     
         26 . The method of  claim 25 , characterized in that each stackable mould is formed by a portion of upper mould and a portion of lower mould assembled to define said tapping cavity and said moulding cavities. 
     
     
         27 . The method of  claim 25 , characterized in that said tapping cavity includes:
 an upper cavity in the form of a truncated cone with a smaller base and a larger base; and   a lower cavity in the form of a truncated cone with a smaller base and a larger base; and   wherein said upper cavity and said lower cavity are opposite between each other and are joined at their respective larger base.   
     
     
         28 . The method of  claim 27 , characterized in that the lower base of said upper cavity is smaller than the smaller base of said lower cavity. 
     
     
         29 . The method of  claim 27 , characterized in that the larger base of said upper cavity is smaller than the larger base of said lower cavity. 
     
     
         30 . The method of  claim 27 , characterized in that said lower cavity allows decreasing the metalostatic pressure during the draining of molten metal through said central filling collector by feeding the contractions that may be formed in said moulding cavities and thus eliminate mould shrinkage. 
     
     
         31 . The method of  claim 27 , characterized in that said upper cavity allows increasing the metalostatic pressure during the draining of molten metal through said central filling collector, by feeding the contractions that may be formed in said moulding cavities and thus eliminate mould shrinkage. 
     
     
         32 . The method of  claim 27 , characterized in that said upper cavity has a shape selected from a group consisting of a bell-shaped form, a truncated pyramid shape, a spherical segment with two bases, or combinations thereof. 
     
     
         33 . The method of  claim 27 , characterized in that said lower cavity has a shape selected from a group consisting of a bell-shaped form, a truncated pyramid shape, a spherical segment with two bases, or combinations thereof. 
     
     
         34 . The method of  claim 25 , characterized in that said step of forming a mould for stratified moulding from a plurality of stackable moulds including the steps of:
 locating a draining cup in the upper portion of said mould for stratified moulding and connected to said central filling collector; and   locating a flow stabilizer in the lower portion of said mould for stratified moulding and connected to said central filling collector.   
     
     
         35 . The method of  claim 34 , characterized in that said draining cup has a shape selected from a group consisting of a bell-shaped form, a truncated pyramid shape, a spherical segment with two bases, or combinations thereof. 
     
     
         36 . The method of claim of  claim 34 , characterized in that said flow stabilizer has a shape selected from a group consisting of a bell-shaped form, a truncated pyramid shape, a spherical segment with one base, a spherical segment with two bases, or combinations thereof. 
     
     
         37 . The method of claim of  claim 25 , characterized in that said tapping cavity allows the formation of hot spots during the draining of molten metal through said central filling collector to achieve a temperature distribution in said mould.