US1371447A - Molding apparatus - Google Patents

Description

C. A. SNOW.

MOLDING APPARATUS. APPLICATION men JULY 27. 1918.

Patented Mar- 15, 1921.

2 SHEETS-SHEET l- C. A. SNOW. MOLDING APPARATUS.

7 APPLICATION FILED JULY 27, l9l8- 1,371,447, Patented Mar. 15,1921.

.2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

CLARENCE A. SNOW, OF NEWTON, IOWA, ASSIGNOR TO THE MAYTAG COMPANY, OF

NEWTON, IOWA, A CORPORATION OF IOWA.

MOLDING APPARATUS.

Specification of Letters Patent.

Patented Mar. 15, 1921.

Application filed Ju1y 27, 1918. Serial No. 246,956.

To all whom it may concern:

Be it known that I, CLARENCE A. Snow, a citizen of the United States, residing at Newton, in the county of Jasper and State of Iowa, have invented new and useful Improvements inMolding Apparatus, of which the following is the specification.

This invention relates to apparatus for use in forming molds in sand or the like and more particularly to the withdrawal of the gate patterns therefrom.

Among the objects of my invention is to make possible theeasy, safe, and rapid withdrawal of the gate patterns for connecting the runner with the casting, after the same has been rammed or tamped in the mold; further to attain the foregoing object in connection with the form of gates known as horn gates; further to provide apparatus in which the gate patterns are caused to move in the are of a circle to eliminate all danger of tearing the sand in withdrawing the gate patterns; further to effect the simultaneous withdrawal of a plurality of gate patterns by the single operation of a handle; further toreturn all of the gate patterns to their operative position by a mere reverse operation to that last mentioned; further to provide a more simple, efiicacious, and economical apparatus; and such further objects, advantages and capabilities as will later more fully appear.

My 'nvention further resides in the combination, construction and arrangement of parts illustrated in the accompanying drawings, and while I have shown therein a preferred embodiment I desire it to be understood that the same is susceptible of modification and change without departing from the spirit of my invention.

In the drawings:

Figure 1 is a perspective view of the upper side of a match plate embodying my invention.

Fig. 2 is a vertical transverse sectional view. of Fig. 1 and showing a portion of the support for the match plate.

Fig. 3 is a detail view showing the arrangement for transmitting rotation from one shaft to the other, r

Fig.4 isaplan view of the match plate for forming the drag or lower half of the mold.

Fig. 5 is an edge elevation of Fig. 4.

Flg. 6 is a vertical transverse section through Fig. 4.

As is well known in the art of molding the mold may be formed upon the opposite sides of a single match plate, the two halves of the mold fitting together upon the with drawal of the match plate and patterns; or the cope may be formed upon one match plate and the drag upon another, after which the two halves of the mold will beput together. I have illustrated my invention as applied to a match plate of the latter class, the match plate for the cope being illustrated in F igs, 1 and 2, and the match plate for the drag half of the mold being illustrated in Figs. 4 to 6.

As shown in Figs. 4 to 6 the match plate for formlng the drag is designated at 1, and has secured thereto a suitable pattern 2 for forming the runner in the mold. The plate 1 is also provided in the usual manner with a plurality of openings 3, within which are embedded to the proper depth the patterns 4 for forming the lower half of the mold. After the sand is suitably rammed or tamped 1n the drag and the drag and match plate 1 rolled over upon the bottom board, the plate 1 is then removed and the patterns with-- drawn. 5 designates suitable pins secured to the plate 1 to properly position the ears of the drag.

Referring now to Figs. 1 and 2, it will be seen that the match plate for formingthe cope or top half of the mold comprises the plate 6 provided with suitable means such as the aperture 7, and the shoulder 8 for properly positioning and maintaining the cope portion of the flask thereon. The match plate 6 is also provided'in the usual manner with the recesses 9, within which are seated the patterns 10 to a depth suflicient to form the proper parting. The patterns are also provided with suitable core prints 10' and 11. The plate 6 is also provided with a plurality of apertures 12, through which eX- fan gear QO-secured upon the shaft17, in

order to transmit rotation,but in an opposite-direction to shaft 17. The horn gate patterns 13 and'13' areformed in the arc of a circle whereby upon suitable rotation of shafts 16 and 17 they will be withdrawn from the sand of the mold, which has been tamped therearound, and caused to pass downwardly through the apertures 12.

The" operation of my improved device is as follows: The drag half of the mold is formed upon the match plate illustrated in Figs. 4 to 6, and completed in an appropriate manner, it having formed therein the runner depression by virtue of the runner pattern 52 secured to match plate 1. After completion of the lower half of the mold theupper half is then formed on match plate 6 shown in Figs. 1 and 2. It is here pointed out that the larger ends of the horn gate patterns 13 and 13 are in approximate alinement, so that after the top half of the mold is completed and placed upon the bottom half these larger ends of the horn gate patterns will fall just above the runner depression formed in the lower half of the mold, into which runner the molten metal will be conducted through a sprue opening formed in' the usual manner. It is of course, understood that prior to filling in the sand for the upper portion of the mold thatthe horn gate patterns will be swung into the position illustrated in Fig. 1. After the sandis suitably tamped or rammed in the upper half of the mold the handle 18 will be raised, thus swinging the horn gate patterns 13 downwardly into the position, as indicated by dotted lines in Fig. 2, thus entirely removing these gate patterns from the sand of the mold and leaving a passageway which, when the pattern is removed from the mold, will conduct the hot metal from'the runner into the mold cavity. By virtue of the engagement between the fan gears 19 and 20 the downward movement of the horn gate patterns 13 will be accompanied by a similar downward movement of the horn gate patterns 13', aswill be clearly seen from the drawing.

. While I have illustrated and'described my improved device for removing gates as being applied in the construction of the up per half of the mold, it is obviousthat the same may be equally well applied in the formation of the lower half of the mold, if desired.

Having now described my invention, I claim: i 1. In apparatus of the class described a plate having a plurality of apertures there in and adapted to have mounted thereon at a distance from each aperture'a pattern, a horn pattern gate mounted in each of said apertures for 'movement therethrough, and means for simultaneously withdrawing said patterns through said apertures, said gate patterns being adapted to contact with said first named patterns. 1

2. In apparatus of the class described a plate having a plurality of apertures therein, a shaft rotatably associated with said plate, and a plurality ofhorn gate patterns rigidly mounted on said shaft and adapted to move through said apertures upon rotation of said shaft, and means to rotate said shaft. r

3. In apparatus of the class described a plate having a plurality of apertures therein, a pair of parallel shafts rotatably mounted on said plate, a plurality of horn gate patterns secured to each of said-shaftsand adapted for movement through said apertures upon rotation of said shafts, and means for rotating said shafts whereby to simultaneously withdraw all of said patterns through said apertures,

4. In'apoaratus of the class described a plate having a plurality of apertures therein, a pair of parallel spaced'shafts rotatably mounted on said plate, aplurality of horn gate patterns secured to each'of said shafts and adapted for movement through said apertures, means for rotating one of said shafts, and means fortransmitting rotation from said last mentioned shaft to the'other shaft whereby to simultaneously withdraw said patterns through said apertures.

5. In apparatus of theclass described a plate having a plurality of apertures there'- in, a horn gate pattern mounted in each of said apertures for movement therethrough, that portion of said horn gate patterns adapted to extend through said apertures being curved substantially on the .arc of a circle, a shaft rotatably 'mounted on said plate, and arms rigidly connecting the curved portion of the 'hornfgate "patterns with said shaft whereby uponrotation of said shaft said horn gate patterns Will'be moved through said apertures.

'6. In apparatus. of the'class described a plate adapted to have mounted thereon a pattern, said plate having an aperture therein spaced from said pattern, a gate pattern mounted for movement through said aperture and. a'daptedfto contact with said pattern, and means for causing'said gate pat tern to move through saidaperture toward and away from said pattern.

7. In apparatus of the class described a plate having a plurality of apertures therein, a pair of shafts rotatably mounted thereon, a plurality of horn gate patterns secured to each of said shafts and adapted to rotate therewith, said gate patterns being mounted for movement in either direction through said apertures, a handle on one of said shafts for rotating the same, and a gear on each of said shafts adapted to intermesh whereby movement of said handle will cause simultaneous rotation of said shafts and a corresponding movement of said gate patterns through said apertures.

In witness whereof, I hereunto subscribe 15 my name to this specification in the presence of two witnesses.

CLARENCE A. SNOW.

Witnesses:

G. A. A. SAUNDERS, W. H. THOMAS.

Images