US1440923A - Die-casting mold - Google Patents

Description

J an. 2, 1923. 1,440,923. A. w. LEMME.

DIE CASTING MOLD.

FILED JULY 2, 192-1. 3 HEETSSHEET INVEN TOR.

Y P B 0M M ATTORNEK 3 SHEETS-SHEET 2.

A. W. LEMME.

DIE CASTING MOLD.

FILED JULY 2,1921.

J an. 2, 1923.

INVENTOR.

Z W M Jan. 2, 1923. 1,440,923.

A. W. LEMME.

DIE CASTING MOLD.

FILED JULY 2,1921. 3 SHEETSSHEET 3.

INVENTOR.

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COMPANY, OF GHIGAGQ-ILLINOIS, A CORPORATION 035. ILLINOIS.

.- grin-CASTING moan.

' Application filed m "2.1m, sem no. eaaoov.

To all-whom it concern Be it known that I, AnoLPH "W LEMME,

a citizen of the United, States, residing at, Chicago, in the county ofCook and State of Illinois, have invented certain new and use ful Improvementsin Die-Casting Molds, of

which the following is a specification. This invention relates to improvements in molds, and has reference-more particularly to improvements in'that class of machine molds designed to produce articles in the.

nature of die castings. Where the product of such molds' has acircular or partly circular form, it is often removed from the" mold or die cavity only with considerable difliculty owing to the fact that in cooling the metal shrinks andcontracts on the inner 'or core member of the die mold and-is not easily separated'therefrom. One object of the present invention is to producean im-- proved die casting mold free from the fault above mentioned. Other objects of'the 1n-, vention are, to

which willproduce a more densely grained in an ordinary sand mold; to provide a mold adapted, through the use of interchangeable die members, to produce articles of the same general form but varying in size and specific shape; and to provide, in a die casting mold, an improved gate system or arrangement which insures a more perfect and complete filling of the mold cavity.

Other objects and advantages of the in-' vention. will be apparent to persons skilled in the art as the same becomes better understood by reference to the following detailed description, taken in connection with the.

the machine, taken in a-plane below that of Fig. 1, and showing the means for detachrovide a mold for casting half bearings of journals and like articles.

C8.I118I'S;- I .Fig. 6 shows in side elevation the product as it comes from the mold, includ ng the t Q 360 Fi 7 is a'vertical section, taken on the [line 7 of Fig. 5:

sprues and Referring to thedrawings, 10 designates a heavy base plate, '11 a top plate, and 12 a rear skeleton casting formed with top and...

bottom flanges 13 and 14 attached to the top platell by screws 15 and to the base plate lQby screws 16. Located side by side inwardly of the rear'casting -12 between the 1 top and base plates 11 and 10 area pair of generally .quadrantal hollow. mold blocks 17-, 'eachformed with aconvex face 18 and a 'f narrowsubstantially radial flat face 19. To

22;, On the upper and lower ends of each these faces are attached, by screws 20 (Figs. 5

5v and 7) curved and flat mold plates 21 and v mold block, near its frontside, are integral 2 i hinge pintles 23 and 24 (Figsf3 and 7) engaged in holes 25 and 26 1n the topand base plates 11 and 10, respectively. and consequently tougher, stronger and more durable product than can be produced Mounted in and between-the top and base plates are vertical hinge pintles 27, on

which are mounted, by hinge lugs 28, a pair ofgenerally quadrantal moldframes 29, to the inner concave sides of which are attached, by screws 30, curved mold plates 31;

these latter with the mold plates 21 and 22,

constitutin the side walls of the generally semi-cylin rical cavity, best shown in Fig. 7.

The mold frames 29 are formed at their free ends with radially directed extensions 29' having fiat meeting faces that are locked together by means of a vertical locking bar 30 pivoted at 31 to lugs 32 on the base plate 10 and carrying a pair of horizontal clamp yokes 33 that, when the locking bar 30 is raised straddle the mold frame extensions 29', 'as shown in Fig. 1, and wedges 34- driven between-the overlapping end of the yokes 33 and the sides of the mold frame extensions 29'. frames 29 are attached by screws 35, a pair of flat top-plates 36, the inner portions of which, when the mold frames are in closed position, lie against th'e upper edges of the inner mold plates 21 and 22, and constitute the top wall of the mold cavity.

Describing next the ating system, in the base plate 10 is formed a seat 37 (Fig. 4;) inwhich is fitted a horn gate 38, one end of To the tops of the mold end communicates with the the horn gate 38 and is disposed in the median transverse plane of the machine.

To accommodate the runnerv gate 39. and

l I hold the same rigidly in position the meet: ",ingfaces of, the frames 29 are notched, as shown at 40 in Fi 1, and themeeting edges of the top p ates 36 are similarly notched as shown at 41 in,Fig. 3, I The meetate. Removably mounted on the top plates I 6 when the .latter'are in closed position is 4 a block 43 in which is formed an. ingate 44 .jfor the pour and ariser gate 45 constituting 1 municating with the upper end. of themold a" continuation of-the ri'ser'gate'42 and comcavity;

The adjacent walls of the inner mold "block 17 do notlie in contact when the .mold blocks are receiving apour, but are slightly divergent, as clearly shown in Fig.

.1, and betweenthem is driven a wedge 46.

- described has The moldingJ apparatus herein shown and bearings for the journa s of locomotive drivers, and similar bearings; and briefly describing the mode of operation, with the;

hinged mold members closed and locked as shown in Figs. 1 and 2, and the wedge 46 driven between the inner mold blocks 17.

" to expand the same, and withfthe several I .horn gate 37 into the bottom of the mold cavity. As the metal enters the latter, the

i cavity is freely vented through the riser gate 45, and the our is continued until the metal rising in the latter shows that the mold cavity is completely filled. As the metal cools and hardens, the semi-cylindrical casting shrinks transversely and grips the inner molds or core members 17 under considerable pressure. By knocking out the wedge 46, however, the inner molds 17 are freed from the casting, and, of course, the

outer molds 29 are readil freed by unlocking them and swinging t em apart, whereupon the castin with the gates and sprues can be readily lifted out of the machine.

Fig. 6 shows the complete casting as it comes from the machine, C designating the casting proper formed in'the mold cavity, I the ingate sprue, R the runner sprue, H

the horn sprue, and R the riser sprue.

The notable advantages of the described molding apparatus are, briefly. stated, as follows: In the first place,.it greatly accelerates the operation of making castings of I assageof a fi vertical runner. gate 39 that is stepped on een designed'more especially. .for the die casting of pho hor-bronze halfthischaracter by making it possible to insta'ntly free the casting without any difculty on account of the latter sticking in the mold. In the second place, as compared with ordinary sand molds, it 'has practically :no yield, and produces a very dense and close grained casting having much greater toughness, durability and. longevity than the ordinary sand'ca'sting; and in the third place,it permits considerable varia-' ,tion in.the sizes and specific shapes of the half hearings to. lie-effected by merely interving edges.- of the top plates 36 are alsck changing the mold plates 21, 22 and 31, formed with semi-circular notches 42 which together form the lower portionof a riser therein. Hence I reserve all such variations and modifications as fall within the spirit and purview of the appendedlclaims.

Iclaimz" 1. Ina molding machine of the character described, the combination of a stationary frame structure, a pair of innermold elements vertically hinged in said frame-structure, a pair of outerv mold. elements also vertically hinged in said frame structure to swing toward and from said inner mold elements, means for clam ing said outer mold elements in closed position, and wedge means for spreading apart said inner mold elements prior to pouring the .metal. 5 v

l 2. In a molding machine of thee'haracter. described, the combination of a stationary frame structure, a pair of generally quadrantal inner mold elements vertically hinged adjacent to their front ends in said frame structure, a pair, of generally quadrantal outer mold elements also vertically hinged in said frame structure at their rear ends to swing toward and from said inner mold ele-' ments, means for clamping said outer mold elements in closed position, and wedge means for laterally expanding said inner mold ele- 'm'en'ts prior to pouringthe metal.

3. In a molding machine of the character described, the combination of a stationary frame structure, a pair of vertically hinged moldblocks mounted in said'frame structure, a pair of vertically hinged mold frames mounted in said frame structure to swing toward and from said mold blocks, mold plates on the adjacent. faces of said mold blocks and mold frames, means for clamping said mold frames in closed position, and a removable wedge insertible between said mold blocks.

4. In a molding machine of the character described, the combination of a'stationary frame structure, a pair of generally quadrantal mold blocks vertically hinged adjacent to their front ends in said frame structure, a pair of generally quadrantal mold frames vertically hinged at their rear ends in said frame structure to swing toward and from said mold blocks, mold plates attached to the adjacent faces of said mold blocks and mold frames, means for clamping said mold frames in closed position, and a removable wedge insertible between the adjacent sides of said mold blocks.

5. In a molding machine of the character described, the combination of a stationary frame structure including horizontal top and base plates, a pair of generally quadrantal mold blocks disposed slde'by side and each having near its front ends upper and lower pintles by which it is pivoted in and between the top and base-plates of said frame structure, a pair of generally quadrantal mold frames pivoted at their rear ends between the top and base plates of said frame structure opposite to said mold blocks and adapted to swing toward and from the latter, mold plates removably attached to the adjacent faces of said mold blocks and mold frames,

means for clamping said mold frames in closed position, and means for laterally expanding said, mold blocks prior to pouring the metal.

6. In a molding machine of the character described, the combination with a frame structure, and inner and outer substantlally semi-circular complementary. mold elements mounted therein and forming the side walls of a vertical mold cavity, of an ingate mounted on said frame, a runner gate in said frame behind said outer mold element and beneath and communicating with said ingate, and a horn gate in the bottom of said frame structure communicating with said runner gate and the bottom of said-mold cavity.

7. In a molding machine of the character described, the combination with a frame structure, and inner and outer substantially semi-circular complementary mold elements mounted therein and forming the side walls of a vertical mold cavity, of an ingate mounted on said frame, a runner gate in said frame behind said outer mold element and beneath and communicating with said ingate, a horn gate in the bottom of said frame structure communicating at one end with said runner gate and at its other end with the bottom of said mold cavity, and ari'ser gate on said frame structure communicating with the top of said mold cavity.

ADOLPH W.LEMME.

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