US1233848A - Mold for the manufacture of concrete blocks. - Google Patents

Description

T. CORNUELLE. 'MOLD on THE MANUFACTURE OF CONCRETE BLOCKS.

Patented July 17,1917.

2 SHEETS-SHEET I APPLICATION FILED JAN- Zh 1916- MW M50 m WWMAQ/w @QWWMQ- 7 T. CORNUELLE. MOLD FOR THEMANUFACTURE 0F CONCRETE BLOCKS.

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THEODORE CORNUELLE, OF CINCINNATI, OHIO.

MOLD FOR, THE MANUFACTURE OF CONCRETE BLOCKS.

Specification of Letters Patent.

Patented July 17,-l9l'7.

Application fi1ed January 21, 1916. Serial No. 73,444.

To all whom it may concern:

Be it known that I, THEODORE Comvimrnn, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Molds for the Manufacture of Concrete Blocks, of which the following is a specification.

This invention relates to molds, or forms, for the manufacture of concrete blocks.

The object of the invention is to provide a mold which is constructed preferably of metal and one which may be easily assembled and knocked down.

Another object of my invention is to produce a mold which may be employed for the manufacture of concrete blocks of the ordinary construction as well as blocks molded in pairs and adapted to be separated by fracturing, in which case the molds may be built one upon another.

Concrete blocks, as is well known, are constructed in numerous ways to imitate stone, especially is it desirable to so construct the face of block so that it will resemble a fractured stone face. It is one of the objects of this invention to provide a mold whereby blocks may be made of concrete, the concrete being poured into the mold, and after theconcrete has settled and dried out sufiiciently the mold removed from the molded block, allowing part of the mold to remain embedded in the block, whereby the block can be fractured by that part of the mold left in the block, enabling the manufacture of blocks with fractured faces, no two being exactly alike, and producing an excellent representation of a fractured stone face.

The invention consists of the certain parts, combination of parts and details of construction as will be described in the following specification and pointed out in the appended claims.

In the drawings which serve to illustrate my invention and which show a preferred construction Figure 1 is a side elevation of a mold constructed in accordance with my invention.

Fig. 2 is a plan view of a portion of the mold in which a single block is molded.

Fig. 3 is a plan view of a portion of the mold adapted to mold a twin block, or in other words, a block which is to be co nstructed with a fractured face. 7

Fig. 4: is a perspective view of one of the side core plates employed.

Fig. 5 is a perspective view of one of the end plates.

Fig. 6 is an elevation of a portion of the core plate, showing the edge of the resilient or yielding core.

Fig. 7 is a perspective view of one of the yielding sides of the core.

Fig. 8 is a cross section taken through the core plate and core showing the means for collapsing, to a certain degree, the core.

Fig. 9 is a cross section of a section of the mold showing a twin block molded therein.

Fig. 10 is a perspective view of one of the side core plates used on top when a twin block is to be constructed and fractured showing the wedges in places.

Fig. 11 is a cross section of a twin block before fracturing.

Fig. 12 is a cross section of a block after fracturing showing the pitching tool in position for finishing the block face.

Fig. 13 is a perspective view of the means for clamping and locking the upper and lower core plates together and also for look ing the core plates and end plates together.

Fig. 14c is a perspective view of one of the end plates showing the core mounted thereon for providing a hand hole in the block.

Referring more particularly to the drawlngs:

1 illustrates the floor upon which the molds are placed. This floor may be that of a carfor conveying the mold under a concrete hopper. The molds are placed up against an end plate at one end and similar means may be provided at the other end if desired. The core plates 3 are provided at their ends with a T flange 4: constructed in any suitable manner, as for instance by riveting theextra member a on the ends thereof. These T flanges extend into the on the abutting end plates are then clamped together by means of the clamping strip 11 which is provided with suitable slots 12 and 13 for interlocking engagement with the subsidiary flanges 10 of the flanges 9. Thus the molds are clamped 'and held together.

Each core plate 3 is provided with a male and female coreextension. The female part of the cores are represented at 13 and are riveted to the side plates 3. There are four of these core extensions for each core and each is slightly curved at its edges so that they overlap each other and provide means for yielding inwardly, slightly, or in other words, collapsing slightly to render it easy for them to be removed from the concrete block after it is molded, and is best shown in Figs. 6 and 7. To insure the collapsing of these cores, I provide steel angular springs 14 which extend inwardly from the sides of the cores, and are held Lmder tension bya ring 15 around the ends of the angular extensions 16 on the springs.

Opposite and on the same core plate, but extending the opposite direction, of the female core, I provide the male core made up of angular plates 17 preferably punched out of the core plate 3 andthen bent at right angles 7 thereto. The plates 17 incline slightly toward the center and are adapted to fit into the end of the female core and spread same apart to the natural size of v the core and hold same there until the mold is knocked down at which time the springs 14 pull the core away from the concrete and allow the cores to be easily removed.

Inasmuch as asmall percentage of frac tured blocks are required in comparison to the smooth sided blocks, any desired number of moldsmay be built up as shown in Fig. 1 for the fractured blocks.

The side core plates 3 are provided for molding the top part ofthe fractured blocks and are provided with flanges 20 at the bot tom edges, Fig. 10. The flanges have square holes therein for the insertion of wedges 21' which are adapted to extend inside of the mold and become embedded in 1 wedges 21.

The side core plates 3 are constructed as shown in Fig. 10 and have an additional flange 23 fastened to the T flange at or, if

desired, the flange 4L may be constructed as an L instead of a T. Then the clamping bar 11 may interlock therewith the same as with the lower series, the same locking bar interlocking both the top and bottom molds.

The end plates 6 are provided with hand hole cores 30 (Fig. 14:) to provide for the easy handling of the blocks after they are molded.

When the concrete is poured into the molds and allowed to dry a given length of time, the wedges 21 are tapped thereby fracturing the block along the dotted line shown in Fig. 11. Then after the block is fractured, the shoulder 25 left thereon by means of the flanges 20 is pitched off with a pitching tool 26 as shown in Fig. 12 which pitching operation removes all trace of the imprint of the wedges and produces a face the exact representation of fractured stone.

.The ends 6 of the molds may be further reinforced by wooden locking braces.

Modifications of my invention might be made without departing from its spirit and scope, but I do not wish to be confined to the exact details shown.

WVhat I claim as new and desire to secure by Letters Patent is:

1. In a mold for making concrete blocks, the combination with a floor and end plates, of side plates, flanges projecting from one side of said side plates and a core projecting from the other side thereof whereby a series of side plates when in position will assemble the cores of a series of molds, said cores and flanges interconnecting respectively with the flanges and core of each succeeding side plate.

2. In a mold for making concrete blocks, the combination with a floor and end plates, of side plates having openings therethrough, each side plate having a core projecting therefrom on one side and around said opening, and flanges extending from the opposite side thereof around said opening, whereby a series. of side plates will form a series of molds and cores therefor and provide a uniform opening through the cores of all the molds in the series.

3. I11 a mold for making concrete blocks, the combination with a frame in which the concrete ismolded to its desired shape, said frame comprising a lower section, an upper section, and wedges inserted therebetween and extending a short distance inside of said frame so as to become embedded in the block a short distance, whereby the block may be broken in halves by operating the wedges after the block has been molded and allowed to settle.

4. In a mold for making concrete blocks, the combination with a frame in which the concrete is molded to its desired shape, said frame comprising a lower section and an upper section, a flat frame therebetween, a

messes series of wedges inserted in said flat frame and extending a short distance inside thereof, so as to become embedded in the concrete a short distance, and whereby the block may be broken in halves by operating the wedges after the block has been molded and allowed to settle.

5. In a mold for making concrete blocks, the combination with a frame in which the concrete is molded to its desired shape, said frame comprising a lower section having longitudinal parallel end bases, a series of partitions therebetween, thereby providing a series of rectangular cells, an upper section similar in construction, the cells of each being in vertical alinement, a molding around the said cells and inserted between the upper and lower sections, and a series of wedges in said molding extending inside of the cells a short distance, so as to become embedded in the concrete and whereby the block is broken when the wedges are operated after the block has been molded and allowed to settle.

6. In a mold for the manufacture of concrete blocks, a floor, an upper and lower section for molding the blocks in pairs, upper and lower side core plates, upper and lower end plates, the upper plates having a flange around the bottom having apertures therein, wedges in said apertures and extending into the mold a short distance so as to be molded into the concrete block, and an inters locking bar for holding the various upper and lower plates in register with one another.

7 The combination in a mold, of a side having a hole therein, inturned flanges formed at the edges of the hole, a core engaging said fianges, and ends detachably connected with the side.

THEODORE CORNUELLE.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

. Washington, D. G.

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