US1776591A - Casting mold - Google Patents

Description

F., LIERS CASTING MOLD Sept. z3, 1930.

3 Sheets-Sheet 1 F. LIERS CASTING MOLD Sept. Z3, 1930.

Filed N'. 15

3 Sheets-Sheet 2 /frfomey F'. LIERS CASTING MOLD sept. 23, 1930.

Filed NOV. l5r 1926 3.5heetS-Sheet Patented Sept. 23, 1930 UNITED STATES PATENT OFFICE CASTING MoLD Application filed November 15, 1926, Serial No. 148,549, and in Germany November 25, 1925 This invent-ion refers broadly to sectional, adjust-able casting molds, and it lis one of the important objects of the invention to provide means of setting the mold by means of levers and linkconnection, to accommodate articles of different sizes and 'configurations and to produce a mold of variable, substantially square or rectangular outer cross sectional shape. It is another important object ot this invention to provide means of enabling the operator to produce a negative and a positive copy of an original in one and the same mold by merely swinging the mold into another position; and it is also an object ot this invention to obtain comparatively smooth castings and to remove and detach or smoothen any fins or undesired rough projections that may have been formed in the process of casting. Other objects and advantages will appear, as the specification proceeds and from an inspection of the accompanying drawings in which by way of exempliication one of the various possible embodiments of the principles of my invention is shown diagrammatically.

In the drawings z--Figure l is a front elevation of the device. Fig. 2 is a top plan view. Fig. 3 is a verticalA longitudinal section of Figs. 1 and 2 turned through 9() degrecs in order to show the operation and arrangement of the sprue or fin removing means. Fig. 4 is a vertical lonvitudinal section of the device when rot-ated, 180 degrees about its horizontal axis. Fig. 5 is a top plan view of the device showing the mold walls in the position corresponding to the minimumsize of the adjustable mold. Fig. 6 is a plan `view seeny from below and without the mold operating'and adjusting levers. Figs. 7, Sand 9 40 represent diagrammatically front views illustrating the relative positions of the mold forming walls the attachments, Fig. 7 corresponding to the position of Fig. 1, Fi 8 being a view at rightangle to Fig. 7 and ig.

9 being a view at right angle to Fig. 8. Fig.

l 10 is a vertical sectional view of Fig. 1.

Upon the base plate a the posts or supports Z are disposed between which the slotted casting plate c is adapted to be turned around upon its pivotingvstuds d lodged in the said posts or supports' By means of a rod or lever Z operatively connected to a supporting bar, wedge or the like fw the plate c may be retained in position. Upon the casting plate c four rectangularly disposed upright plates or wallsf are mounted either directly or by means o bars m disposed intermediate the walls f and the plate c. Levers c with link connection g, y are provided to enable the walls f to be moved towards and away from each other at right angle to each other. By means of suitable marginal recesses and projecting parts a close iit of the walls f in the closing or operating position of the mold may be insured. In the eXemplification shown in the drawing one of the said walls f is rigidly secured to the casting plate c, while the other plates f are movable with relation thereto. The plates f may be guided along each other, so that they are made to enclose either a square-shaped or an oblong chamber in the operative or closing position of the parts. The arrangement maybe such that two of the plates f may be moved-by one and the samev lever e pivoted for instance in the frame p and having suitable link connection q. The entire combination of parts described including the casting plate c with the walls or plates f are connected jin such a manner that this entire device may by turned around on the pivoting studs d, so that the casting plate c is either at the bottom or on top of the device.

The plates forming the walls of the molds are designated in the exemplification shown respectively by f, f1. f2. f3. Of these the plate f is assumed to be stationary and the opposite plate f2 is so arranged that bythe operation of the two side levers e and e1 it will be carriedalong by the movement of the sideplates or Walls f1 and f3 respectively engaged by the levers c and e. These levers will therefore not only cause the separate movement of the sideplates f1 and f at the left hand and right hand of the cavity as shown'in the -drawing but they will also cause the intermediate front plate f2 to be moved with either of the side plates f1, f3. Thus it will be obvious that by the operation of' but oneof the levers e, e the size of the quadrangular mold will be changed inasmuch vas ege..

by either one of the levers two walls, that is to say the front wall and'one of the sid-e walls are displaced. -After the operation of one lever and the corresponding displacement of the two walls referred to the respectively opposite lever may be operated with the result that the remaining lsidewall (f1 or f3) is displaced together with the front wall (f2) the 4arrangement being such that the last operated sidewall is moved towards the lirst operated sidewall. The levers are so arranged and linked to the sidewalls f1, f3 that one of the sidewalls, say f1, may be moved at right angle to the stationary rearwall f, while the other sidelever e1 is linked to the opposite sidewall f3 in such a manner that this latter sidewall is moved in parallelism with the stationary rear wall. With this end in view the lever e which operates the left hand side wall f1 is shaped like an elbow or abell-crank lever and by its angularly disposed arm g it enters a socket in the side-wall f1 and is freely movabletherein, so that when the lever e is moved in the direction of the arrow on its pivot plate p the side wall f1 is moved in the angular direction with relation to the stationary wall f. On-

the other hand the opposite operating lever e1 which is pivoted on its pivoting plate p1 is connected by the link g1 to the right-hand side wall f3. Upon moving the lever e1 in the direction of the arrow or in the reverse direction the side wall f3 is thereby moved means of somewhat hook-shaped extensions or projections L, k', h2, h3 provided on the respective mold walls corresponding to their indices, the said extensions or projections being adapted to reach over the next adjoining side wall and to act as a guide therefor in its movement. Thus. the extension h which is attached to the stationary rear wall f extends downwards over the left-hand side wall f. The extension h1 which is secured at the end of the side wall f1 opposite the extension h extendsdownwards over the front wall f2. The latter wall is `provided with a similar hook-shaped extension h2 which extends over the right-hand side wall f3 and the latter side wall f3 carries a similar extension k3 extending over the stationary rear wall f. After the side walls have been adjusted to the proper size of mold they may be locked in position by the screws 'r2 and r3 of which rzis secured in the hook-shaped extension h2 and is adapted for engagement with the right-hand side wall f3, while the screw 7^ is disposed in the hook-shaped extension h3 lsecured to the right-hand side wall fs and may be engaged with the stationary rear wall f. By this means a great variety of sizes of the mold may be obtained. In the exemplification shown the hook-shaped extensions h, h1, h2, k are screwed or otherwise secured to angular reinforcing rails or the-like t1, t2,

lt3, t respectively attached to the corresponding side walls, in order to obviate the necessity of weakening the side -walls by the inj sertion of the fastening screws, and to thereside walls, the left-hand side wall f1 being guided Aangulaily at the end of the rear wall f while the right-hand side wall f3 is guided along the front side'of said rear'wall. The movable front wall f2 when moving withv the left-hand side wall is guided along the righthand side wall and when moving with the right-hand side wall is guided at the end of the left-hand side wall. n y

'lhe sidewalls at their insides may be provided with shoulders, projections or the like shown particularly in Figs. 3, 4 and 7-9 of the drawing and adapted for the seating thereon of the pattern from which the desired simile is to be manufactured. The walls are movable upon the base plate or casting plate c which is provided with a slot, the walls of which are preferably Haring outwards so that in the reversed position of the mold this slot may be employed for the pouring in of the casting material. This slot also provides guiding means for the sprue or fin removing knife g which is operated by the handle i which isunder the action of the spring i2 and is pivoted on the stud k secured to the bottom of the base plate c of the device. By means of the connecting link z'l the handle operates the knife g and moves'it within the casting and guide slot 4g1 in the casting plato C.

y'llie device described may be operated substantially as follows: The original article indicated at .fr of the drawing is mtroduced into the mold box and positioned upon the base plate c and between the walls thereof. The levers e and e are then operated to tightly enclose .and closely hug the article or pattern. Now the casting is eifected by pouring liquid metal or other casting material from above into the mold box and upon the article or pattern secured therein. After the metal or casting material has become solidified orI sufficiently cool the negative obtained may be withdrawn by simply opening the box by the operation of the levers. In accordance with amodified form of operation the entire device may .be turned on its pivots d and by opening the side walls the negative obtained lo previously obtained constitutes the bottom of the mold cavity. The casting material is then poured into this cavity through the slot g1 which then fills the cavity above the negative` 1/ and is allowed to solidify therein. The

casting sprue o1' tin which exists on the simile obtained and extends into the slot g1 isthen cut oli' by the operation of the handle or lever z'. After the positive e has been finished in this manner it may be removed by the opergo ation of the levers e, e and be allowed to drop out together with the negative y, or these j parts may be removed by turning the mold box once again through 180 degrees so as to bring it on top, and by then operating the levers, the positive and the negative become accessible. Thus it is possible to obtain any number of very exact copies of the original pattern by the intermediary of the negative produced in the first stage of the treatment.

By operatijj the sprue removing knife g with a short rap1 and powerful movement it will smoothlycut olf any excess of material so as to dispense with the necessity of difficult trimming operations for the removing of the lins or projections.

*awhile I have described my invention by way of illustration of its principles in a preferred embodiment thereof, it should be understood that modifications may be made and 0 that no limitations upon the invention are intended other than are imposed by the scope of the appended claims.

1. In a casting mold the combination with plurality of engagable, box-enclosing walls, slidingly movable away from and towards each other, of a supporting plate secured to said walls and rotatable on a horizontal axis, an apertured part on said plate communi- :o eating with the cavity between the walls and supporting means for said plate.

2. In a casting mold the combination with a plurality of engageable, box-enclosing Walls, of projecting parts at the outside of said walls and engaging corresponding parts of the adjacent walls, and oppositely disposed operating means on said walls, adapted to move the walls in two different directions and at an angle to each other, and a turnable supportl ing bottom for said walls, and an apertured part on said bottom, adapted for communication with the mold-cavity.

3. In a casting mold the combination with a plurality of engageable, box enclosing slidable walls, of lateral, endwise stepped, angular extensions on each of said walls, adapted to be guided along the adjacent wall and engageable with the stepped end-portions thereof,.operating means oppositely disposed on the walls and adapted to move the walls in different directions, a turnable supporting bottom, and supporting means for said bottom on which the walls are mounted.

4. In a casting mold the combination with a plurality ofengageable, cavity enclosing walls, of exterior, lateral, endwise projecting extensions respectively secured to each of said walls, and endwise intersectingly engaging with each other, guiding means at the engaging portions of the extensions, means to secure said extensions in their relative positions, oppositely disposed levers, linked to said walls and adapted to move the exten` sions and the walls in different directions, a turnable bottom plate 'on which said walls are supported, and supporting means for said plate.

5. In a casting mold the combination with a plurality rof engageable, cavity enclosing walls of exterior, lateral endwise projectingextensions respectively secured to each of said walls, and endwise intersectingly engaging with each other, guiding means at the engaging portions of the extensions, oppositely disposed levers, connected to said walls, i

and adapted to move them relatively to each on which said walls are supported, and a sprue-and-in removing knife movably disposed at the outer surface of said table below its apertured portion.

6. In a. casting mold the combination with a stationarily disposed wall, and three relatively movable walls in engagement therewith, -and enclosing a cavity, of exterior, angular, endwise stepped, inter-engaging extensions, respectively attached to each of said walls and overhangingly uided on the respectively adjacentV wall, evers, linked to the oppositely disposed movable Walls, an apertured molding table on which said walls are supported, and turnable in the vertical plane, and supporting means for said table.

7. In a casting mold the combination with a stationarily disposed Wall and three relatively movable walls in engagement therewith and enclosing a cavity, of exterior, angular, endwise stepped, endwise inter-engaging extensions, respectively attached to the walls and overhangingly guided on the respectively adjacent wall, means operatively connected to the opposite movable side Walls, a horizontally turnable, apertured moldin`g`ftable on which the walls are supported, supporting means' for the table and sprueand-fin-removing means on the table below the apertured part thereof.

8. In a reversible casting mold a bottom plate, slidably and angularly disposed up- `other, a turnable, apertured molding table right enclosing Walls on said plate, surrounding a molding cavity, and an apertured feeding section on the bottom plate near one of said Walls.

9. In a reversible casting mold a bottom plate, slidably and angularly disposed upright enclosing Walls on said plate, surrounding a molding cavity, substantially endwise disposed tongue-and-notch sections on said Walls, engaging with the adjacent Walls, and an apertured feeding section on said bottom plate near one of said Walls, and reversing means for said mold.

10. In a reversible casting mold a bottom plate, charge-feeding means in said plate,

four quadrangularly disposed, relatively angularly movable upright walls, slidably mounted on said plate and enclosing a moldingand working cavity, and respectively projecting and receding inter-engaging extensions on'the outer sides and on the. top portions of said walls.

1 1. In a reversible casting mold a bottom plate, reversing means operatively connected to said plate, four substantially quadrangularly disposed, relatively angular-ly movable upright Walls, slidably mounted on said plate, moving means, linked to two opposite Walls, an outwardly flaring, substantially inversely funnel-shaped feeding portion in said bottom plate, and sprue cutting means movable in said feeding portion.

FRITZ LIERS.

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