Indirect extrusion

Claim 2

In an indirect extrusion press having die means through which material is adapted to be extruded, an open ended container for holding a billet of said material positioned on one side of said die means for telescoping movement thereover, and gag means at the end of said container remote from said die means having a surface for engaging against the remote end of the container and moving said container over said die means and the billet material therethrough, the improvement wherein: a. said gag means has a cavity formed in said Surface facing and aligned with the remote end of said container for receiving billet material, said cavity being disposed beyond the remote end of said container.

Claim 3

In an indirect extrusion press having die means through which material is adapted to be extruded, an open ended container for holding a billet of said material positioned on one side of said die means for telescoping movement thereover, and gag means at the end of said container remote from said die means for engaging against and moving said container over said die means and the billet material therethrough, the improvement wherein: a. said gag means has a cavity therein facing and aligned with the remote end of said container for receiving billet material; and b. the cavity in said gag means has a cross-sectional size as great as that of the bore through said container.

Claim 4

In an indirect extrusion press having die means through which material is adapted to be extruded, an open ended container for holding a billet of said material positioned on one side of said die means for telescoping movement thereover, and gag means at the end of said container remote from said die means for engaging against and moving said container over said die means and the billet material therethrough, the improvement wherein: a. said gag means has a cavity therein facing and aligned with the remote end of said container for receiving billet material; and b. the cavity in said gag means has a cross-sectional size as great as that of the bore through said container.

Claim 5

The improvement according to claim 1 wherein: a. the cavity in said gag means has a depth equal to the length of the butt that would normally be required if the gag had no cavity therein.

Claim 6

In an indirect extrusion press having die means through which material is adapted to be extruded, an open ended container for holding a billet of said material positioned on one side of said die means for telescoping movement thereover, and gag means at the end of said container remote from said die means for engaging against and moving said container over said die means and the billet material therethrough, the improvement wherein: a. said gag means has a cavity therein facing and aligned with the remote end of said container for receiving billet material; and b. the cavity in said gag means has a depth sufficient to absorb the flow of billet material occurring on the one side of said die means during the extruding of all of the billet material within the container without interfering pressure reaction from the bottom surface of said cavity aligned with the bore of the container.

Claim 7

In an indirect extrusion press having die means through which material is adapted to be extruded, an open ended container for holding a billet of said material positioned on one side of said die means for telescoping movement thereover, and gag means at the end of said container remote from said die means for engaging against and moving said container over said die means and the billet material therethrough, the improvement wherein: a. said gag means has a cavity therein facing and aligned with the remote end of said container for receiving billet material; and b. the cavity in said gag means has a depth sufficient to absorb the flow of billet material occurring on the one side of said die means during the extruding of all of the billet material within the container without interfering pressure reaction from the bottom surface of said cavity aligned with the bore of the container.

Claim 8

The improvement according to claim 4 wherein: a. the cavity in said gag means has a cross-sectional shape generally corresponding to that of the bore through said container.

Claim 9

The improvement according to claim 5 further comprising: a. heating means for heating the container and gag means to heat the billet material therein to substantially equal temperatures.

Claim 10

The improvement according to claim 4 further comprising: a. means for shifting said gag means transversely of the axis of extrusion after extrusion of said material from the container to shear the billet material in the gag means from the extruded product.

Claim 11

The improvement according to claim 4 further comprising: a. means for retracting said gag means after an extrusion operation from engagement with said container; and b. cutting means for cutting the extruded product from the billet material held by said gag means after separation of said gag means and container.

Claim 12

In the indirect extrusion of a billet of material through die means where the billet is held in an open ended container positioned on one side of the die means, the improvement comprising: a. confining billet material externally of the container at the end remote from said die means to close said end; b. confining the billet material held by said container between the die means and the billet material at the remote end of the container; and c. extruding the confined billet material held in the container through said die means.

Claim 13

In the indirect extrusion of a billet of material through die means where the billet is held in an open ended container positioned on one side of the die means, the improvement comprising: a. confining billet material externally of the container at the end remote from said die means to close said end; b. confining the billet material held by said container between the die means and the billet material at the remote end of the container; and c. extruding the confined billet material held in the container through said die means.

Claim 14

The improvement according to claim 9 including: a. confining at the remote end of the container billet material having a thickness sufficient to absorb the flow of material occurring on the one side of said die means during the extruding of all of the billet material within the container.

Claim 15

The improvement according to claim 10 including: a. confining at the remote end of the container billet material of a cross-sectional shape generally corresponding to that of the billet material held in the container.

Claim 16

The improvement according to claim 11 further comprising: a. moving the confined billet material at said remote end of the container away from the container after extrusion of the billet material held in the container; and b. severing the extruded product from the confined billet material.

Claim 17

The improvement according to claim 11 further comprising: a. maintaining the confined billet material at the remote end of the container at a temperature about equal to the temperature of the billet material held in said container during the extrusion operation.

Claim 18

In the indirect extrusion of a billet of material through die means where the billet is held in an open ended container positioned on one side of the die means, the improvement comprising: a. moving the billet material into contact with said die means at one end of said container; b. moving the billet material partially out the other end of the container into a confined area; c. extruding the billet material remaining in the container through said die means; and d. severing the extruded product from the billet material in said confined area.

Claim 19

In the indirect extrusion of a billet of material through die means where the billet is held in an open ended container positioned on one side of the die means, the improvement comprising: a. moving the billet material into contact with said die means at one end of said container; b. moving the billet material partially out the other end of the container into a confined area; c. extruding the billet material remaining in the container through said die means; and d. severing the extruded product from the billet material in said confined area.

Claim 20

The improvement according to claim 14 further comprising: a. placing a second billet of material in said container after the extrusion of the first mentioned billet material; b. placing the billet material held by said gag means during the previous extrusion against said other end of the container; and c. extruding the second billet material held in the container through said die means.