US2121450A - Mold structure - Google Patents

Description

June 21, 1938. 4 J. T. SENTROP 2,121,450

MOLD STRUCTURE Filed Feb. 28, 1936 3 Sheets-Sheet l INII'ENTOR. Jo% anncs 7. dkr/Tryz,

- v BY l/l/mf/ a; ML 4% w s I, 1 5 614mg: ATTORNEYS.

June 21; 193s.- E T 2,121,450

MOLD STRUCTURE Filed Feb. 28, 1936 3 Sheets-Sheet 2 Q Q Q 0 IL 11 IL i j J I I ATTORNEYS June 21, 1938.. R 2,121,450

MOLD STRUCTURE 4 Filed Feb. 28, 1956 3 Sheets-Sheet 3 X z; INVEN TOR. I fohannea']? 15221220 ,h Z Zfiufjor BY J77 Mal/Q5444? ATTORNEYS.

Patented June 21, 1938 MOLD STRUCTURE Johannes T. Sentrop, Wyoming Township, Kent i County, Mich.

' Application'February 28, 1936, Serial No. 66,188

p 12 Claims.

a The present inventionrelates to'mold or form structures for making concreteblocks and the like: and its-object is, generally, to provide such a structure having a mold or form whose sides or wallsmay be readily separated to remove the molded work; and more particularly to provide such a mold having an innerwall adjustable relatively to an adjaccht outerwall of the mold; andfurther, to provide such a mold having sides or walls swingably connected; and further, to provide simpleand effective means for releasably securing-said walls in their position of use; and further, to' provide such a structure on which the mold is turnable to a position wherein the Work maybe readily removed.

"These and any other and more specific objects hereinafter appearing are attained by, and

, the invention finds apreferable embodiment in,

the illustrative structure particularly described in the body of this specification and illustrated by the accompanying *drawings, in which:

t Figure 1 is an 'elevational righthand side view of my structure for forming concrete blocks and the like, showing the parts in their cooperative position of use;

Figure 2 isa top plan view thereof, certain parts being broken away; I I Figure-dis an elevational rear view of the same; certain parts being broken away; a i Figure 4 is anelevational front view of right hand side upper portions of the structure;

Figure 5-is 'a view similar to Figure 1 but showing the rear wall of the structure swung rearwardly and middle parts broken away;

Figure 6 is an elevational right hand side view thereof showing the form or mold portion of the structure turned forwardly, and lower portions broken away; l i i Figure 7 is an elevational front viewof the same, showing said form or mold portion turned forwardly, the side Walls swung open, the inner wall swung somewhat rearwardly and the molded concrete block and. the plate or templet withdrawn;

Figure 8 is a view in perspective of a concrete block formed in this structure; 7

Figure 9 is an elevational right hand side view of a modified construction, with its rear wall swung rearwardly;

Figure 10 is anelevational rear .view of upper portions thereof, certain parts being shown in vertical section taken on line ill-Ill of Figure 9; Figure 11 is a view in perspective of a concrete block formed in this modified construction. The embodiment of the invention illustrated by these drawings is a structure for formingor molding concrete blocks and the like. This structure includes a support or base portion desirably comprising a pair of metal castings I connected by horizontal threaded rods 2,3. The form or mold portion carried by, this base comprises a bottom 5 pivotally mounted on the rod 3 to swing about a horizontal axis, opposite side walls ii pivotally mounted at l on the bottom to swing about an axis at right angles to said rod, a front wall 8 pivotally mounted at 9 on rod3, and a rear wall it having long arms ll pivotally mounted at G on the castings I.

These walls are, desirably metal castings with strengthening ribs as shown and are releasably held in the use position shown in Figures 1, 2, 3, and 4 by suitable means, as follows: A pair of Jods It at the opposite sides 6 of the mold are turnableon the spindles i l of blocks which have spindles 65, at right angles to they spindles l4, turnable in bearings in the rear walls ears 16.

The free front ends of these rods 13 are received into notches or sockets IT in the front wall, and are threaded so that their nuts [8 may be turned into contact with the outer side of the front wall to hold the front and rear walls tightly in their use position. The side walls 6 are releasably held in said use position by hook catches it engaging the front wall 8 and similar catches 2i] engaging the hereinafter described innerfwall ii of the mold. The side walls are also held by the rods is which Wedgingly engage their upwardly-inwardly inclined ribs 5!.

The. rear wall ill carries on its inner side the core or cores 22 secured thereto by threaded bolts 23 extending through the cores outwardly projecting lugs 24 andhaving nuts 25 contacting the inner side of the cores flanges 26. An inner Wall 21 (forming the actual rear wall of the form of mold) has its arms 3! pivotally mounted at 21 on the bottom 5 and has stops 2B threaded in the inner walls rearwardly projecting bosses 29, the heads 30 of these stops, when the stops are turned to desired position, engaging the inner surface of the rear wall ii! to hold said rear and inner walls in desired adjusted position. This inner wall has curved notches 32 extending downwardly from its upper edge, in which notches the cores 22 fit at their under and lateral sides. A flat plate or templet 33 is placed in contact with the front walls inner surface (or its inwardly extending ribs 34 as shownl, this plate forming the actual front wall of the mold or form.

The parts being in the use position shown" in Figures 1, 2, 3 and 4, except that the rear wall I0 is swung back to withdraw the cores, concrete is poured into the open top of the mold for forming the concrete block 35 shown in Figure 8, whose pits 36 (for the engagement of suitable handling tools) are formed by the inward projections 31 of the side walls 6 and whose rabbet 38 is formed by a molding strip 39 on the inner side of the plate 33 adjacent its lower edge as. indicated in Figures 1, 2 and 5. When the mold is filled to the level of the bottom of the notches 32 the rear wall It! with the cores is swung forwardly and the mold is completely filled.

When the form is filled, the nuts l8 are loosened, the rods l3 swung upwardly out of the notches I! of the front wall 8 and then outwardly the rear wall In with, the cores 22 swung rearwardly, the hook catches I9, 20 are released and the side walls 6 are swung outwardly and the inner wall rearwardly. The form or mold portion of the structure is turned on the rod 3 upwardly and forwardly to resting position on the front brackets 49 as shown in Figures 6 and 7. This brings the molded block 35 to a position wherein it rests on the now horizontal plate or templet 33 so that the block with. said plate may be readily removed upwardly or horizontally from the structure.

, In the modified construction illustrated in Figures 9 and 10 (wherein the concrete block 41 shown in Figure 11 is formed), the inner wall 2 I has openings 42, instead of notches like those shown at 32 in other views, the cores 22 passing through these openings as the rear wall II] is swung. These cores are curved in cross section instead of having flat upper sides as shown in other views.

By reason of the long arms i I of the rear wall In as shown, a radius. for the swinging movement of the rear wall is provided sufficiently long that the withdrawal of the cores does not disturb the concrete in the mold.

The rabbets 45, 46 in block 41 are formed by molding stripsindicated at 41, 48 in Figure 9.

The particular concrete blocks shown by the drawings are building blocks adapted to be fitted together in wall construction.

A chain 49 limits the rearwardly swinging movement of the rear wall in both constructions, and'the coiled spring 50 whose ends are fastened tolinks of the chain nearer each other than the length of the spring serves to cushion this movement. The invention being intended to be pointed out in the claims, is not to be limited to or by details of construction or arrangement of any par- .ticular embodiment thereof illustrated by the drawings or hereinbefore described.

I claim:

1. A mold structure comprising a base and a mold supported thereby having a. bottom, a) pair of opposite side mold walls pivotally connected with the bottom for swinging movement to and from operative closed position and a secand pair of opposite side walls one of which being :a'mold wall is pivotally connected with the bottom, the other one of said second pair being of opposite side mold walls pivotally connected with the bottom for swinging movement to and from operative closed position and a second pair of opposite side walls one of which being a mold wall is pivotally connected with the bottom, the other one of said second pair being pivotally connected with the base independently of the other walls for swinging movements respectively to and from operative closed position, and releasable means for holding said walls in said position including a rod turnably connected with one wall of one of said pairs for vertical and horizontal swinging movements and adapted in one swungposition to releasably engage at its free end with the other wall of said pair to hold said pair in operatively closed position.

3. A mold structure comprising a base and a mold supported thereby having a bottom, a pair of opposite side mold walls pivotally connected with the bottom for swinging movement to and from operative closed position and a second pair of opposite side walls one of which being a mold wall is pivotally connected with the bottom, the other one of said second pair being pivotally connected with the base for swinging movements respectively to and from operative closed position, and releasable means for holding said walls in said position including a block member pivotally mounted on one wall of one of said pairs and a rod pivotally mounted on said member to turn about an axis at right angles to the axis of the pivotal mounting of said memberon said wall and adapted to engage at its free end with the other wall of said pair to hold said pair in operative closed position.

4. A mold structure comprising a base and a mold supported thereby having a bottom, a pair of opposite side mold walls pivotally connected with the bottom for swinging movement to and from operative closed position and a second pair of opposite side walls one of which being a mold wall is pivotally connected with the bottom, the

other one of said second' pair being pivotally connected with the base independently of the other walls for swinging movements respectively to and from operative closed position, and releasable means for holding said walls in said position including a rod turnably connected with one wall of one of said pairs and having its free end threaded and provided with a nut adapted to adjustably engage the other wall of said pair to hold said pairin operative closed position.

5. A mold structure comprising a base and a mold supported thereby having a bottom, a pair ofv opposite side mold walls pivotally connected with the bottom for swinging movement to and from operative closed position and a second pair of opposite side walls one of which being a mold wall is pivotally connected with thebottom, the other one of said second pair carrying the core of the mold and being pivotally connected with the base remote from the mold. said second pair being swingable on their pivotal connections to and from operative closed position.

6. A' mold structure comprising a base and a mold supported thereby having a bottom, a wall pivotally connected with the base for swinging movement to and from operative closed position and an inner wall pivotally connected with thebottom for swinging movement about an axis parallel with the axis of the first-mentioned walls movement, and adjustable stops between said walls for limiting their approaching movement.

7. A mold structure comprising abase and a mold supported thereby having a bottom, a pair of opposite side mold walls pivotally connected with the bottom for swinging movement to and from operative closed position, a second pair of opposite side walls one of which being a mold wall is pivotally connected with the bottom for swinging movement to and from operative closed position, the other one of said sec ond pair being pivotally connected with the base for swinging movement to and from operative closed position, and an inner wall pivotall; connected with the bottom for swinging movement about an axis parallel with the axis of the movement of the wall which is pivotally connected with the base, threaded stops for ad'- justably limiting the relatively approaching movement of the inner wall and the wall which is connected with'the base, releasable means for connecting the side walls in their closed posit on with the inneriwall, and releasable means for holding said second pair in operative closed position.

8. A mold structure comprising a base and a mold supported thereby having a bottom, a pair of opposite side mold walls pivotally connected with the bottom for swinging movement to and from operative closed position, a second pair of opposite side walls one of which being a mold wall is pivotally connected with the bottom for swinging movement to and from operativeclosed position, the other one of said second pair carrying the core of the mold on its inner side and being pivotally connected with the base for swingingmovement to and from operative closed position, and an inner wall having an opening receiving said core and being pivotally connected with the bottom for swinging movement about an axis parallel with the axis of the movement of the wall which is pivotally connected with the base, releasable means for holding the first-mentioned pair of walls in connected relation with the inner wall and releasable means for holding the second-mentioned pair of walls in operative closed position.

9. A mold structure comprising a base and a mold supported thereby having a bottom pivotally connected with the base for swinging movement between material-receiving and workdischarging positions of the mold, a pair of opposite side mold wallspivotally connected with the bottom for swinging movement to and from operative closed position, a front wall pivotally connected with the bottom for swinging movement to and from operative position, and a rear wall pivotally connected with the base independently of the other walls for swinging movement to and from operative closed position, and releasable means for holding the walls in operative closed position.

10. A mold structure comprising a base and a mold supported thereby having a bottom pivotally connected with the base for swinging movement rearwardly to a position wherein the mold receives the material to be molded and forwardly to a position wherein the molded work is discharged from the mold, a pair of opposite-side mold walls pivotally connected with the bottom for swinging movement to and from operative closed position, a front wall pivotally connected with the bottom for rearwardly-forwardly swinging movement to and from operative closed position, a rear wall pivotally connected with the base independently of the other walls for forwardly-rearwardly' swinging movement to and from operative closed position and an inner wall pivotally connected with the bottom for forwardly-rearwardly swinging movement to stopped positions, and releasable means for holding the walls in operative position.

11. A mold structure comprising a base and a mold supported thereby having a bottom pivotally connected with the base for swinging move ment rearwardly to a position wherein the mold receives the material to be molded and forwardly to a position wherein the molded work is discharged from the'mold, a pair of opposite side mold walls pivotally connected with the bottom for swinging movement to and from operative closed position, a front wall pivotally connected with the bottom for rearwardly-forwardly swinging movement to and'from operative closed position, a rear wall carrying the core of the mold on its inner side and pivotally connected with the base for forwardly-rearwardly swinging movement to and from operative closed position and an inner wall having an opening receiving said core and pivotally connected with the bottom for forwardly-rearwardly swinging movement to stopped positions, and releasable means for holding the walls in operative position.

12. A mold structure comprising a base and a mold supported thereby having a bottom, a pair of opposite side mold walls pivotally connected with the bottom for swinging movement to and from operative closed position and a second pair of opposite side walls one of which being a mold wall is pivotally connected with the bottom, the other one of said second pair being pivotally connectedwith the base independently of the other walls for swinging movements respectively to and from operative closed positions, and releasable means for holding all the walls in their operative closed positions including a pair of rods swingably connected at one end with one wall of one of said pairs and adapted to engage at their free ends the other wall of said pair and to engage in their middles the walls respectively of the other pair of walls to hold all the walls JOHANNES T. SENTROP.

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