US678256A - Cope-pattern. - Google Patents

Description

No. 678,256. Patented July 9, IBM. J. G. JOHNSTON.

CUPE PATTERN.

(Application filed Dec. 13, 1900.)

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(No Model.)

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No. 678,256. Patented July 9, l9 0l.

J. a. JOHNSTON.

COPE PATTERN.

(Application filed Dec. 13, 1900.) (No Model.) 2 Shaats-$heet 2.

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-rTEn- STATES PATENT OrFicE.

JOSEPH G. JOHNSTON, OF DETROIT, MICHIGAN, ASSIGNOR TO THE AMERI- CAN OAR & FOUNDRY COMPANY, OF ST. LOUIS, MISSOURI.

COPE- PATTERN.

' SPECIFICATION forming part of Letters Patent No. 678,256, dated July 9, 1901. Application filed December 13, 1900- Serial No. 39,691. (No model.)

To all whom it may concern: To attain the objects to which I have above Be it known that I, JOSEPH G. JOHNSTON, referred, I make use of the construction illus a citizen of the United States, residing at the trated in the accompanying drawings, wherecity of Detroit, county of Wayne, State of -inlikecharactersdesignatelike partsthrough- 55 Michigan, have invented a certain new and out the several views.

useful Improvement in Cope- Patterns, of p In the drawings, M represents the chillwhich the following is a full, clear, and exact ring, N the skeleton flask, and O the pattern, description, such as will enable others skilled all of which parts are employed to carry out in the art to which it appertains to make and my present invention. This chill-ring M has 60 use the same, reference being had to the aca slightly-conical inner face m, which blends companying drawings, forming part of this into an enlarged recess m, formed in one edge specification, in which of said ring, said face and recess being of a Figure l is a top plan View of my improved shape to conform to the tread and part of the cope-pattern, chill-ring, and flask. Fig. 2 is flange, respectively, and consequently the 65 a vertical sectional view of the same, taken on throat of the car-wheel. The outer face of line 2 2, Fig. 1, the same illustrating a sand this chill-ring M is provided with. trunnions matrix therein before the parts have been m, by'which the same may be handled by subjected to pressure. Fig. 3 is a vertical the bail of a hoist or crane, and is also prosectional View of a completed mold, showing vided with lugs or cars m and m, the former 70 the relative position of my improved cope, being provided with holes for receiving bolts flask, and chill-ring to a drag-flask. Fig. 4 or securing devices m for attachment to the is a side elevational view of the same, showflask N, while the latter is provided with pins ing the manner in which the parts are clamped m, which engage in one operation perforated together; and Fig. 5 is a detail elevational lugs or ears 0 formed on the pattern, and in 75 view. another operation perforated lugs or ears This invention relates to a new and useful formed on the drag-flask L, which latter opimprovement in a cope-pattern, flask, and 'eration occurs when a mold .is formed ready chill-ring, the same being designed particuto receive molten metal by arranging and larly for use in the formation of the sand maclamping together the drag-flask L, chill-ring 8o trix for the flask of the cope side of a mold M, and the cope-flask N, as is illustrated in for casting car-wheels. Figs. 3 and 4.

One object of my present invention is to While I have illustrated and referred in produce a pattern, flask, and chill-ring of the this application to the drag-flask L, it forms character described which is effective, comno part of this invention, as it is the subject- 85 paratively light, strong, and susceptible of matterofaseparate application seriallynumbeing handled and manipulated by a moldbered 39,693, to which I have previously reing-maohine such as is illustrated and deferred,the same being illustrated and briefly scribed in an application filed by me July 9, described here only for the purpose of mak- 1900, serially numbered 22,987. ing the construction and use of myimproved o 40 Another object is to form a cope side or cope pattern, flask, and chill -ring more flask of a mold with a sand matrix which will clearly understood. be complementary to adrag-flask and itssand The pattern 0 consists of a face-plate 0, matrix such as shown and described in an properly shaped to conform to one face of a application filed by me December 13, 1900, car-wheel, in the center of which is arranged 5 5 said application being serially ,numbered a removable core-print 0. The face-plate is 39,693. strengthened on its lower side by suitable With these objects in view the invention strengthening webs or ribs 0 and has a botconsists in the novel construction, arrangetom plate 0 forming a reduced portion for ment, and combination of the several parts of fitting in an opening of a turn-table when 100 my device, allas will hereinafterbe described, practicing my invention in connection with and afterward pointed out in the claims. the molding-machine forming the subjectmatter of application serially numbered 22,987, to which I have before referred.

0* indicates spring-seats projecting laterally from the pattern, four of such seats being preferably arranged equidistantly around the same. Springs 0 are arranged in these seats and sustain an inverted cup or cap piece 0, serving as a follower and guide and also supporting the chill-riug'M, as will hereinafter be described.

Bolts 0 passing through the cap-pieces and spring-seats, hold the springs u'nder compression and limit the upward movement of the caps. In addition to the springs, the copepattern is provided with lugs or ears 0 and in these are formed holes which receive the pins m of-the chill-ring. The cope pattern is further provided with stops 0*, which meet the lower face of the chill-ring when said cope pattern, chill-ring, and flaskare being pressed, as will hereinafter be explained, making a uniform distance of travel and limiting the movement of the parts.

The cope-flask N consists of a skeleton frame which is bolted or otherwise secured to the chill-ring M, and, as shown in Figs. 1 and 2, this cope-flask is made up of a plurality of three concentric rings n, connected by radially-disposed ribs or barsn. The lower edges of the two innermost of these concentric rings and radial ribs or bars are formed beveled or knife-liketo enable the sand to pack uniformly therearound.

The skeleton cope-flask is so constructed that it conforms to the contour of the pattern, both as to the sharp edges of the bars next the pattern and their upper edges.

When it is desired to make a sand matrix for my improved flask and chill-ring, the two are placed upon the pattern 0, as illustrated in Fig. 2. Sand is then poured through the skeleton flask onto the face plate 0, after which the sand is distributed over the pattern by a sweep (not shown) of such shape that it will regulate the depth of sand required on the different parts of the pattern, so that all the molds will contain a uniform quantity of sand, it being understood that the parts are previously arranged in one of the openings in the turn-table of the molding-machine, such as shown in application serially numbered 22,987, to which I have before referred. The turn-table being revolved until the flask, chill-ring, and pattern register with the press is subjected to pressure by the press, which pressure forces the flask and chill-ring and the pattern toward each other and compresses the sand contained within the parts until further movement of the parts toward each other is arrested by the contact of the lugs 0 on the pattern with the under face of the chill-ring. Springs 0 being now under compression will upon the release of pressure force the chillring and its carried flask away from the pattern, carrying with them the pressed-sand matrix. The chill-ring, flask, and its carried sand matrix are now removed from the pattern and are ready to be placed over and clamped to the drag-flask L and its carried sand matrix, as shown in Figs. 3 and 4, preparatory to receiving the charge of molten metal, it being understood that all necessary cores were placed in the drag portion of the Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. The combination with a pattern provided with pockets at points around its periphery, of springs arranged in said pockets for supporting a chill-ring, caps for the springs, and bolts passing through the caps and the bottom walls of the pockets, substantially as described.

2. The combination withacircular pattern, of recessed lugs 0 extending laterally beyond the periphery of said pattern, said lugs being arranged on the bottom portion of the pattern, springs arranged in the recesses of said lugs for supporting a chill-ring, and stops on the pattern for engaging the chill-ring when the springs are compressed, substantially as described.

3. Theherein-described pattern comprising a face-place, a bottom wall, ribs connecting said face-plate and bottom wall, recessed lugs extending laterally from the pattern, and springs arranged in the recesses in said lugs; substantially as described.

4. The herein-described pattern whose body portion comprises a face-plate, side walls and bottom wall, interiorly-arranged strengthening-ribs, laterally-projecting recessed lugs which extend beyond the periphery of the body portion of the pattern, and springs in the recesses in said lugs for supporting the chill-ring; substantially as described.

In testimony whereof I hereunto allix my signature, in the presence of two witnesses, this 4th day of December, 1900.

JOSEPH G. JOHNSTON.

\Vitnesses:

DAVID W. HAWKSWORTH, JOHN STEVENSON, Jr.

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