US682866A - Drawing-die. - Google Patents

Description

No. 682,866. Patented sept. I7, l90l. 0. ASCHE.

DRAWING mg. (Application filed FebILD, 1901.) (No Model.)

UNITED STATES PATENT OFFICE.

OTTO ASCI-IE, OF BOULOGNE-SUR-SEINE, FRANCE.

DRAWING-DIE.

SPECIFICATION forming part of Letters Patent N 0. 682,866, dated September 1'7, 1901.

Application filed February 25, 1901. Serial No. 48.779. (N0 model.)

To ctZZ whom it may concern:

Be it known that I, OTTO ASOHE, a subject of the Emperor of Germany, residing in Boulogne-sur-Seine, France, have invented certain new and useful Improvements in Drawing-Dies, of which the following is a specification.

It is generally known that the tinned sheet- Inetal plates in the market are not of even thickness. Not only do different sheets differ in thickness, but even each individual sheet has stronger and weaker portions. These unevennesses in the thickness are increased by the tin coating given to the sheets, which is often of different thickness on difiercnt portions of the sheets. This uneven thickness of the sheets forms a very objectionable feature in drawing them into cans or other vessels. According to the methods heretofore in use the sheet to be drawn into a tin can-body is held between two straight faces, known, respectively, as drawing-die and holding-die, of which each is formed in a shape corresponding to the shape of the canbody and made of a strong and undivided ring. Inasmuch as the sheet thus held subject to the action of the dies is of dilferent thicknesses at different portions of the same, it is obvious that the drawing action exerted on the same by the drawing-die is greater on the thicker portions than on the weaker portions of the sheet. In consequence thereof the sheet is often torn or at least drawn so as to present an uneven height of rim.

The object of this invention is to obviate the hereinbefore mentioned defect which takes place in the drawing of sheet metal into cans and other vessels, and for this purpose the invention consists in a drawing-die, a holding-die, and a plunger passing through the drawing-die proper and the holding-die, said holding-die being composed of a facering formed of independent sector-shaped pieces movable to slide one on the other, a supporting top plate a cushion interposed between the face-ringand the top plate, and means for separately supporting the sectorsh'aped pieces and for connecting the facering, cushion, andat'op plate.

In the accompanying drawings, Figure 1 represents a vertical central section of my improved drawing-die. Fig. 2 is a plan view of the same; and Fig. 3 is a modified form of the same, showing it constructed with a yielding drawing-ring.

Similar letters of reference indicate corresponding parts.

My improved drawing-die consists of the usual. ring-shaped drawingdie a, which is provided with a central opening for the plunger b, that passes through a corresponding opening in the holding-die d. The sheet metal to be drawn into cup shape is placed in a re cess in the face of the drawing-die a and rigidly held between the face of the drawing-die and the face of the holding-die. The holding= die d consists, as shown in dotted lines in Fig. 2, of a number of sector-shaped pieces a, which are attached by means of screw-bolts d to the supporting top plate 2, and the heads of which screw-bolts move and are guided in the sockets in the supporting-plate. An elastic cushioning layer f of soft rubber or other suitable material of a proper degree of elasticity is interposed between the sector-shaped pieces 0 and the supporting-plate e and firmly held on the latter by means of the screw-bolts d. The pieces 0 and the interposed elastic layer fare inclosed by a stout ring g. As will be readily seen in Fig. 1, the sector-shaped pieces 0 are movable independently of each otherin upward direction. ,When, therefore, between the drawing-ring a and holding-die d a piece of sheet metal of uneven thickness is placed, then the sector-shaped pieces that press on the thicker portions are forced up ward into the elastic cushion f, so that a slightly-greater pressure is exerted on the thicker portions, while all the remaining portions are subjected to a less pressure, receiving only such pressure as is necessary for preventing folds and the tearing of the sheet or other irregularities in the formation of the can-body. In Fig. 3 the holding-die is formed of a continuous ring it, which is made of comparatively thinner metal and which bears fullyagainst the interposed elastic cushion f.

It will be evident to those skilled in the art that the construction described can be carried out in various ways. It is also evident that the interposed elastic cushion may be formed of several elastic layers, springs, or other elastic means.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent- 1. A drawing-die for sheet metal, the same consisting of a drawing-die proper, a holdingdie, and a plunger passing through the drawing-die proper and holding-die, said holdingdie being composed of a face-ring formed of independent sector-shaped pieces, movable to slide one on the other, a supporting top plate, and means for separately supporting the sector-shaped pieces and for connecting the face-ring, cushion, and top plate, substantially as set forth.

2. A drawing-die for sheet metal, the same consisting of a drawing-die proper, a holdingdie, and a plunger guided into the holdingdie and drawing=die proper, said holding-die being composed of a face-ring, a supporting top plate provided with sockets, an elastic cushion interposed between the face-ring and the top plate, and screw-bolts connecting the face-ring and the elastic cushion with the top plate, the heads of said bolts being countersunk and guided and movable in the sockets in the said supporting top plate, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

OTTO ASOHE.

Witnesses:

GUSTAVE ANDREAS, EMILE HENNAYING.

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