Shell press, and die assembly and associated method therefor

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Quick Facts

Patent No.: US 7,942,030
App. No.: 12/827,281
Granted: May 17, 2011
Kind: B2

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Abstract

A die assembly is provided, which is structured to be affixed to a shell press. The die assembly includes at least one die shoe having first and second opposing ends, and a number of divisions between the first end and the second end. The divisions are structured to divide the at least one die shoe into a plurality of pieces to accommodate thermal expansion. Each of the divisions between the pieces of the at least one die shoe has a profile. Preferably, the profile is not straight. Each of the divisions of the at least one die shoe form a gap between the pieces of the die shoe, thereby spacing the pieces apart from one another. The pieces are independently coupled to a corresponding mounting surface of the shell press. A shell press and a method for employing the die assembly in a shell press are also disclosed.

Claims (39)

1. A die assembly structured to be affixed to a shell press, the die assembly comprising:

at least one die shoe comprising a first end, a second end disposed opposite and distal from the first end, and a number of divisions between the first end and the second end,

wherein the divisions are structured to divide said die shoe into a plurality of pieces,

wherein operation of said shell press generates heat causing said pieces to thermally expand,

wherein the spacing between said pieces accommodates said thermal expansion,

wherein each of the divisions between adjacent pieces of said die shoe has a profile,

wherein the profile is not straight, and

wherein said die shoe further comprises a first edge and a second edge disposed opposite and distal from the first edge; wherein the profile is a stepped profile; wherein the stepped profile includes a first segment, a second segment and a third segment interconnecting the first segment and the second segment; wherein the first segment extends from the first edge of said die shoe toward the second edge of said die shoe; wherein the second segment extends from the second edge of said die shoe toward the first edge; wherein the first segment is horizontally offset from the second segment; and wherein the third segment extends perpendicularly between the first segment and the second segment.

2. The die assembly of claim 1 wherein the number of divisions of said die shoe are a first division and a second division; wherein the plurality of pieces of said die shoe are a first piece, a second piece and a third piece; wherein the first division is disposed between the first piece and the second piece; and wherein the second division is disposed between the second piece and the third piece.

3. The die assembly of claim 1 wherein the shell press includes a first mounting surface and a second mounting surface; wherein said die shoe further comprises a first side and a second side disposed opposite the first side; and wherein the first side is structured to be coupled to a corresponding one of the first mounting surface of the shell press and the second mounting surface of the shell press.

4. The die assembly of claim 3 wherein said pieces of said die shoe are structured to be independently coupled to the corresponding one of the first mounting surface of the shell press and the second mounting surface of the shell press.

5. The die assembly of claim 1 wherein the at least one die shoe is a first die shoe and a second die shoe; and wherein said first die shoe is coupled to said second die shoe by a plurality of guide assemblies.

6. A shell press comprising:

a first mounting surface;

a second mounting surface disposed opposite the first mounting surface; and

a die assembly comprising:

at least one die shoe comprising a first side, a second side disposed opposite the first side, a first end, a second end disposed opposite and distal from the first end, and a number of divisions between the first end and the second end, the first side being coupled to a corresponding one of the first mounting surface of the shell press and the second mounting surface of the shell press,

wherein the divisions are structured to divide said die shoe into a plurality of pieces,

wherein operation of said shell press generates heat causing said pieces to thermally expand,

wherein the spacing between said pieces accommodates said thermal expansion,

wherein each of the divisions between adjacent pieces of said die shoe has a profile,

wherein the profile is not straight, and

7. The shell press of claim 6 wherein the number of divisions of said die shoe are a first division and a second division; wherein the plurality of pieces of said die shoe are a first piece, a second piece and a third piece; wherein the first division is disposed between the first piece and the second piece; and wherein the second division is disposed between the second piece and the third piece.

8. The shell press of claim 6 wherein the pieces of said die shoe are independently coupled to the corresponding one of the first mounting surface of the shell press and the second mounting surface of the shell press.

9. The shell press of claim 6 wherein said at least one die shoe is a first die shoe and a second die shoe; wherein the pieces of said first die shoe are coupled to the first mounting surface of the shell press; and wherein the pieces of said second die shoe are coupled to the second mounting surface of the shell press, opposite the first die shoe.

10. The shell press of claim 9 wherein said first die shoe is coupled to said second die shoe by a plurality of guide assemblies.

11. A method of employing a shell press having a die assembly including at least one die shoe, the method comprising:

providing a number of divisions in said die shoe to divide said die shoe into a plurality of pieces;

coupling each of said pieces to a corresponding mounting surface of the shell press; and

operating said shell press,

wherein the operation of said shell press generates heat causing said pieces to thermally expand,

wherein there is spacing between said pieces of said die shoe,

wherein the spacing between said pieces of said die shoe accommodates said thermal expansion,

wherein each of the divisions between adjacent pieces of said die shoe has a profile,

wherein the profile is not straight, and

12. The method of claim 11 wherein said corresponding mounting surface of said shell press is a first mounting surface and a second mounting surface disposed opposite the first mounting surface; wherein said at least one die shoe of said die assembly comprises a first die shoe and a second die shoe each having a plurality of pieces; and wherein the method further comprises,

prior to the operation of said shell press, independently fastening each of said pieces of said first die shoe to the first mounting surface of the shell press, and independently fastening each of said pieces of said second die shoe to the second mounting surface of the shell press.