US673848A - Die for forming metallic plates. - Google Patents

Description

L. L. SAGENDORPH. DIE FOR FORMING METALLIC PLATES.

(Application filed June 8, 1900.)

Patented May 7, mm.

No. 673,848. Patented May 7, I901.

L. L. SAGEND ORPH. DIE FOR FORMING METALLIB PLATES.

(Application filed June 8, 1900.)

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LONGLEY LEVIS SAGENDORPH, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO I-IARLAN P. LLOYD, OF CINCINNATI,

OHIO.

DIE FOR FORMING METALLIC PLATES.

SPECIFICATION forming part of Letters Patent No. 673,848, dated May '7,

Application filed June 8, 1900.

To all] whom it may concern.-

Be it known that I, LONGLEY Lnwrs SAGEN- DORPH, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Dies for Forming Metallic Plates, of which the following is a specification.

The object of my invention is to reduce the cost of manufacture of dies for striking up sheet-metal plates and other objects. This object I attain in the following manner, reference being had to the accompanying drawings, in Which- Figure 1 is a side-view of the upper and lower dies with the plunger and bed-plate in section. Fig. 2 is an inverted plan view of the upper die. Fig. 3 is a sectional view of the upper and lower dies, and Figs. 4, 5, and 6 are perspective views showing the parts of the upper die detached.

My invention is especially applicable to dies for striking up sheet-metal plates. For this work the dies require to be renewed at intervals and a large number of dies are essential owing to the different patterns required. It will be understood, however, that the invention can be used for stamping any material and for any purpose without departing from my invention.

Heretofore in the manufacture of dies for striking up metallic plates the dies were made entirely of metal, and in patents granted to me, Nos. 616,976, dated January 3, 1899, and 639,096, dated December 12, 1899, I have described and claimed dies and the process of making same, in which a soft-metal die is faced with a hard-metal plate. Therefore I lay no claim to this feature. I will now describe my present invention.

A is the lower die, and B the upper die. In the present instance the lower die is the hardmetal die out to the desired design and hardened in the ordinary manner. The'upper die 13 has a metallic facing D, of sheet-steel or othersuitable metal, which is pressed, preferably, by means of the lower die A and castmetal die. This cast-metal die is cast from the lower die A and kept simply for the purpose of reproducing the metallic facingplate D.

E is the frame of the upper die, quadran- $erial No. 19,535. (No model.)

gular in the present instance, and having one or more cross-bars 6. These crossbars are perforated for the passage of the bolts 6, by which the die is secured to the plunger B, the lower die being confined to the bed A, as shown in Fig. 1.

The metallic face-plate D has a flange cl, which is secured to the frame E by rivets, screws, or other means of fastening, as shown in Fig. 3, and between the cross-bars e and the face-plate D, I preferably insert a strip of metallic lathing, bars, strips, or wire-cloth f. The frame is filled with plastic or molten materialI, which will set or harden to form a rigid backingfor the metallic face-plate D. The material I is held together by the lathing f, which prevents it from cracking, and the bolts 6 are also held in position by the material I. The material I, that is filled in the plate to support the face-plate of the die, may be concrete, cement, rubber, lead, Babbitt metal, or any material which can be poured into the frame, so as to fill in the crevices of the dieplate, or any plastic material which can be forced into the crevices and which will become hard and sustain the pressure to which the die is subjected. In large dies, for sheetmetal work for instance, I preferably use concrete or cement; but in small (lies I may use a rubber composition, lead, or any metal which has a lower melting-point than the plate. Thus I provide a mass of homogeneous material to sustain the pressure against the metallic face'plate. This material can be readily replaced if it should disintegrate or crack after the die has been used, and the face-plate when Worn can also be readily replaced when necessary.

In practice when it is desired to make a standard metallic ceiling-plate, forinstance, I will strike up a number of the face-plates D by means of the die A and the cast-metal die and make up several dies B and keep some of the face-plates in reserve, so that should one of the dies B need refacing the old plate D can be removed, as well as the coment or other filling material, and a new faceplate attached to the frame and fresh material poured into the frame.

It will be understood that while I have shown a quadrangular frame the frame may be round, oval, or, in fact, any shape desired,

according to the pattern and the shape of the article to be pressed.

Myinvention can also be used for both the 1. A die having a frame, a metallic faceplate secured thereto, and a backing within the frame of a material that will withstand I the pressure, said material being applied to the frame and plate in a plastic or molten condition, substantially as described.

2. A die having a thin metallic face-plate, a frame-support for said face-plate, and a backing of cement or other material inserted in the frame to conform to the face-plate, substantially as described.

3. A die having a metallic faceplate, a backing .therefor, and a metallic tie-plate or bars within the backing, substantially as and for the purpose specified.

4. A die having a frame with cross-bars secured thereto, bolts projecting from said crossbars, a metallic faceplate secured to said frame, cement or other material forming a backing for the face-plate in which portions of the bolts are embedded, and a perforated sheet of metal within the backing, substantially as described.

5. A die having a frame, a flanged metallic face-plate secured to said frame, and a backing for the face-plate within the frame, substantially as described.

6. A die having a frame, with cross-bars secured thereto,'bolts projecting from said crossbars, a metallic face-plate secured to said frame, and cement or other material forming a backing for the faceplate and in which portions of the bolts are embedded, substantially as described.

In testimony whereof I have signed my name to this specification in the-presence of two subscribing witnesses.

LON GLEY LEWIS SAGENDORPH.

Witnesses:

WILL. A. BARR, J 0s. H. KLEIN.

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