US1056694A

US1056694A - Method and apparatus for making wire-drawing dies.

Info

Publication number: US1056694A
Application number: US66734211A
Authority: US
Inventors: Frederick Krause
Original assignee: Individual
Current assignee: Individual
Priority date: 1911-12-22
Filing date: 1911-12-22
Publication date: 1913-03-18
Anticipated expiration: 1930-03-18

Description

F. KRAUSE. METHOD AND APPARATUS FOR MAKING WIRE DRAWING 1112s APPLICATION FILED DEC. 22, 1911.

Patented Mar. 18,1913.

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To all whom it may concem: Be it known that I, FREDERICK KuAU-sn, a citizen of the Empire of Germany-{and aresident of J erse City, county of Hudson, State;of-' New ersey, have invented certain new anduseful Improvements in Methods and Ap aratu's for Making Wire-Drawing Dies,"o which the followingis a spec 1fi cation,';-- f I, .This :inv'entionrelates to an improved method' ofand apparatus for making wire drawing die's."

Heretofore the casting of mantles around precious-stones, preferably diamonds, was .efiected v direction of its boring upon one or between I .two broad plates to hold same in position while cast-in a ring of metal, such. as 'steel or nic el alloy around it, and to 2D conductawayIfromthe stone the high fusion 'heatfof the metal of which the setting 7 is com os'edr iWiredrawing diesproduced according to ithe above, mentioned method are deficient 'in that the diamond, during the .operationof drawing the wire does not have any 'supp'ort in thedirection of its hor- 3' mg because the outer side of the boring is i ee from supporting material. therefore,

he diamond itself has to hear the entire. 80 train of the drawing of the wire. .This

guite often results inc splintering. of the iamond around the opening or t tearing outparticles at that side of. the boring where the wire leaves the die.

5 It is the purpose of the present invention to overcome the described deficiencies and produce a wire drawing die whose stone is provided with a metallic mantle cast around it so that practically the boring alone is 0 left free. Thus the stone has a strong support on part of the mantle during the drawing of the wires. To attain this purpose, the

stone must be held between two conical pointed rods within the mold.

5 Practice has shown that these pointed supporting rods fuse to the cast metal owing to the high fusion temperature of the latter, particularly when steel or nickel alloys are used. Such fusion takes place especially on the thin pointed ortions of the rods closely to the'stone. The boring of the stone later becomes very difficult and the fused portions of metal near the stone are hard to openwhereby thestone is injured in most instances. insulation of the thin pointed iusrnonsrm 'APPARATU'S mamam'm wmE-nmwme DIES.

' Specification Of LettersPatent. vPatented Mar.18,19.13." ApplicationfiledDeceniher22;1911;. SerialNo.6t3'L842.

by supporting the diamond in the scribed hereinafter. I I The presentjinvention is illustrated in the portions of the supporting ,rods with a re- I 1 -.fractory coating of clay or the like is not reliable The insulating mass does not ed rods, but fallsrofi or is' by the flowing meta-1. I-n, t; is-manner the cast mantle .will contain impurities and a. f partial fusion of the mantle and the supporting rods .ma take place, Furthermore, I experience has s own that the v holding rodsare not suflicient y in contact stick uniformly to all portions-of the poiut-v 4 i a1'tly 1 'emo\'ed with thestone, which results in an'imperfect 1 a conduction of the heat therefrom. Under 1; 1 these circumstances the boring of the stone oints of thea sufi'ers because the opening thereinisrough and shows minute cracks.

, For the purpose of avoiding-the described ,1 f. deficiencies I have invented'the method, and 1 apparatus for carrymg same'intoefi'ect, de-

accom an in" drawin m which:

y a g Figure 1 represents in vertical central sec- ,5

tion on line 1. -1 of 3 a'n apparatus for" present method may be carried out, Eig. is a sideelevation of Fig. 3. Fig, 3 a

making wire drawing diesin which ,t-heeh 1" i plan view, and Fig. tillustrates .in centra lfi i sectional view on an enlar ed scale the stone with the metal cast aroun it. 8.5

Similar characters of reference denote like parts in all the figures.

One of the novel features of the present invention consists in the use of fine metal tubes having more or less thin walls inplace of the solid rods heretofore employed. Y These tubes do not require any insulation and may fuse or weld to the'cast metal but, leave the boring of the stone free. This-renders it possible to finishthe opening in the casting without ditiiculty and without injury to the stone, said opening bein preferabl made conical as shown in- %ig. v4. In a dition thereto the arrangement of the.

device is such thatthe mantle may be cast around the stone while same ism a hori zontal position which permits of a circulation of air through the tubes during and aft-er casting, whereby a sufiicient cooling in the interior of the stone, particularly in the neighborhood of-the opening, is eifected. 1; is' evident that the hot air rises and, thereore, take place during the process of casting, because the tubes are mounted in a vertical 1 a continuous circulation of air 'will i I 6. In an ipp'arat u s for producing wire Signed at Nw. Yoik, N. Y., this 21st day i drawing dies anexchangeable ringwith |0f Decembei'1911. j

mold opening, two small cubes extending into said mold openings and adapted to sup- FREDERICK B SE 5 port a bored diamond in a horizontal posi- Witnesses:

tion, and means for supporting said ex- BRAU'N,

changeable ring. i MARIE H. LEHB.