US942989A - Die for use in the manufacture of eyelets. - Google Patents

Description

7. RENEWED MAY 11, 1909.

Patented Dec. 14, 1909.

G E WARREN DIE FOR USE IN THE MANUFACTURE OF EYELBTS. APPLICATION FILED JULY 16, 190 942,989.

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GEORGE E. WARREN, 0F BOSTON, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MA- CHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

DIE FOR USE IN THE MANUFACTURE OF EYELETS.

Application filed July 16, 1907, Serial No. 383,990. Renewed May 11, 1909.

To all whom it may concem:

Be it known that I, GEORGE E. WARREN, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Dies for Use in the Manufacture of Eyelets; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to dies for use in the manufacture of eyelets and similar articles provided with a flange and with a tubular shank or barrel.

The object of the present invention is to produce strong and durable male and female dies which will act in a satisfactory manner and without liability of injury to produce sufficient pressure on a blank of flange shaping die with a central former projecting from the bottom of the die, and providing the male flange shaping die with a recess concentric with the former of the female die and arranged to receive the metal forced from between the flange shaping surfaces of the dies and to cooperate with said former to shape said metal into a tubular shank or barrel. By providing the female die with a-former, and by placing the cooperating recess in the male die, the desired shape can be given to the flange shaping surfaces of both dies without the production of any thin edges which would be liable to become broken or injured during the operation of the dies.

Broadly considered the invention contemplates making the -former and recess of any desired shape. Preferably, however, the recess is made tapering so that the walls of the recess exert an inward pressure on the metal forming and reduce the shank or barrel to tapering form. This shape of recess is particularly advantageous in the manufacture of eyelets since it is highly desirable that the barrel of an eyelet taper slightly from the flange Specification of Letters Patent.

blank illustrated in Fig. 5

the tubular shank or barrel.

Patented Dec. 14., 1909.

Serial No. 495.375.

to the end which is upset when the eyelet is used. Theformer may be constructed so as to merely cooperate with the recess in the male die to cause the metal forced from between the fian e shaping surfaces of the dies to form a tu loular shank or barrel or if desired it may be shaped to exert a bending and drawing action on a portion of a blank when the blank is forced into the die. This latter construction of former is also particularly advantageous in the manufacture of eyelets since thereby the amount of metal which must be removed in completing the eyelet is lessened as, will be hereinafter more fully explained.

The present invention will be clearly understood from an inspection of the accompanying drawing in which- 4 Figure 1 is a vertical sectional view of a male and female die embodying the same. Fig. 2 is a. sectional view of a metal blank which the dies illustrated in Fig. 1 are adapted to operate upon. Fig. 3 is a sectional view of the article produced by the dies illustrated in Fig. 1.- Fig. 1 is a sectional View similar to Fig. 1 but showing a modified form of female die. Fig. 5 is a sectional view of a blank which the dies illustrated in Fig. 1 are particularly designed to operate upon and Fig. 6 is a sectional view of the article produced from the by the dies illustrated in Fig. 4.

The dies illustrated in the drawing are adapted to form circular eyelets and are designed to operate upon aluminum, zinc alloys which will flow under pressure.

The dies illustrated in Fig. 1 consist. of a male die 1 and a female die 2, the male die being of general cylindrical form and adapted to fit snugly into the female die. The female die is provided with an annular concave flange shaping surface indicated at 3 and the male die is provided with an annular flat flange shaping surface 4. From the bottom of the female die a central former 5 projects above the flange shaping surface 3 and in the male die 1 a recess 6 is provided which is concentric with the former 5 and the lower end of which is somewhat larger in diameter than the upper end of the former. A narrowannular space is thus provided between the former 5 and the walls of the recess 6 when the male circular blanks of or other suitable metals or die is caused to enter the female die, and through this space the metal of the blank is forced from between the flange shaping surfaces of the dies, and displaced metal flowing into the recess of the male die and forming a tubular shank or barrel. To prevent the wall of the barrel being thicker at its lower end, the wall of the recess 6 is preferably cylindrical for a short distance as indicated at 7. In the construction illustrated in the drawing the recess 6 tapers above the cylindrical portion 7 so that an inward pressure is exerted upon the metal forming the barrel of the eyelet and the barrel is reduced to tapering form.

It will be noted that the concave flange shaping surface of the female die is continuous with the cylindrical side wall of the die and with the wall of the former and that the flange shaping surface of the male die is a plain surface at right angles to the cylil'ldrical surface of the die. Neither die therefore presents a thin edge and the dies can withstand the pressure to which they are subjected without liability of injury.

The dies illustrated in Fig. 1 can be used with'any suitable form of circular or annular blank. The blank upon which the dies are particularly designed to act is, however, of the form indicated at 8, in Fig. 2, which blank is circular and provided with a depressed central portion 9. This blank is inverted and placed in the female die 2 and then the dies are brought together to exert a sufficient pressure on the annular portion of the blank to shape the flange of the eyelet and force the excess of metal from between the flange shaping surfaces of the dies into the recess 6. The blank after it is acted upon by the dies is indicated at 10 in Fig. To complete the eyelet the disk at the end of the barrel may be punched out and the inner surface and end of the barrel may be trimmed in any suitable manner.

The dies illustrated in Fig. 4 are similar to those illustrated in Fig. 1 with the exception that the central former 11 of the female (lie is somewhat longer and rounder than the former illustrated in Fig. 1. The former illustrated in Fig. 4 is adapted to bend and draw the central portion of a blank when the blank is forced into the female die and thereby the amount of metal which must be removed from the end of the barrel in completing the eyelet is reduced. The blank upon which the die illustrated in Fig. 4 is particularly designedto operate is illustrated at 12 in Fig. 5. This blank is similar to the blank illustrated in Fig. 2 with the exception that it is provided with a central perforation. lVhen this blank is placed in the die illustrated in Fig. 4 and the dies are brought together the round end of the former 11 bends the metal surrounding the perforation upwardly and this portion of the blank is drawn out to some extent. Thereafter the excess metal'in the annular portion of the blank is forced from between the flange shaping surfaces of the dies and the barrel of the eyelet is completed, the final action of the dies being the same as that of the dies illustrated in Fig. 1. The article produced from the blank illustrated in Fig. 5 by the dies illustrated in Fig. 4 is indicated at 13 in Fig. 6. This article is similar to thev article illustrated in Fig. 3 with the exception that it is provided at the end of the barrel with a perforation somewhat larger than the perforation in the original blank 12. By the use of a perforated blank such as illustrated in Fig. 5 and a former of the shape illustrated in Fig. 4, a considerable saving is effected in the amount of metal used in producing an eyelet.

The nature and scope of the present invention having been indicated and the preferred embodiment of the invention having been specifically described, what is claimed 1s:

1. The combination with a female flange shaping die rovided with a concave flange shaping sur ace and with a central former projecting from the bottom of the die, of a male flange shaping die shaped to fit snugly within the side wall of the female die and provided with a recess to receive the metal forced from between the dies and cooperate or barrel.

2. The combination with a female flange shaping die provided with a concave flange shaping surface and with a central former pro ecting fr'om the bottom of the die, of a male flange shaping die shaped to fit snugly within the side wall of the female die and provided with a tapering recess to cooperate with said former to produce a tubular shank or barrel from the metal forced from between the dies and exert an inwardpressure on the metal forming the barrel to reduce it to tapering form.

3. The combination with a female flangeshaping die provided with a concave flange shaping surface and with a central former pro ecting therefrom shaped to exert a drawing or bending action on a blank forced into the die, of a male'flange shaping die shaped to fit snugly within the side wall of the female die and provided with a recess to receive the metal forced from between the dies and cooperate with said former to produce a tubular shank or barrel.

In testimony whereof I a-ifix my signature,

in presence of two witnesses.

. GEORGE E. WARREN. Witnesses:

' WILLIAM A. SARGENT,

ALFRED H. HILDRETH.

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