US1656097A

US1656097A - Machine i ob

Info

Publication number: US1656097A
Authority: US
Publication date: 1928-01-10
Anticipated expiration: 1945-01-10

Description

Jan. 10, 1928. 1,656,097

v. DAHL MACHINE FOR MAKING HOLLOW CONCRETE BLOCKS AND THE LIKE Filed April 2,'1925 2 sheets-sheet 1 l l l l l l I wie i l `\'-D I' l l# 1 f N ATTORNEY..

Jan. 10, 1928. 1,656,097

V. DAHL MACHINE FOR MAKING HOLLOW CONCRETE BLOCKS AND THE LIKE Filed April 2, 1925 2 Sheets-Sheet 2 Patented Jan. it), lilith.

retener UNITED STATES PATEN FFICE.

MACHINE 'FR MAKNG HLLV CUNCRE'TE IBLMS .lhl IJKE.

.Application filed April 2, with.

rlhis invention relates to machines for making hollow concrete blocks or tile tor building purposes7 especially bloelrs composed oi' einder concrete, that is, concrete in which the inert ingredient or aggregate consists largely or entirely of coal ashes or cinders. The chiet object ot the invention is to provide a machine in which the tiles or blocks are termed on their side, thereby minimizing the tendency olf the material to deform by reason ot its own weig it When removed from the mold. it. further object is to provide a machine et simple and du rable construction which can be constructed at low cost and be capable et turning out blocks of uniform size and quality in a rapid and eiicient manner. To these and other ends the invention comprises the novel 'teatures hereinafter described.

The preferred embodiment ot the inven tion is illustrated in the accompanying drawings, in which Fig. 1 is a side view of a complete handdriven machine, With the various parts thereof in their initial positions, ready for operation.

Fig. 2 is a detail side view showing the feed-hopper in its forward position, over the mold.

Fig. 3 is adetail side vieuT showing the sizing plate in its lower position, eompressing the concrete inthe mold to a uniform thickness of block.`

Fig. t is a detail plan view, and Fig. 5 a detail side view, of the plungers an d mecha nism 'for rotating .and reciprocating the same to i'orm the passages or openings in the block.

Fig. 6 is a detail front view, and Fig. 7 a detail rear view, of the plunger mechanism shown in Figs. 4 and 5.

Fig. 8 is a detail perspective view cutting head used on theplungers.

Fig. 9 is a detail perspective vien1 mold, showing also 'the removable of the et the pallet which closes the bottom ot the mold and onl which the molded block is carried away.

Fig@ 10 is a detail perspective vieiv of a Vliolldiv block or tile as it comes from the Serial No. 361,029.

molded block. is to be removed the latch is released and the Walls swung out, Where upon the pallet 15, which i'orms the bottom ot' the mold.y can be lifted oft its supports 16.

The mold is mounted at the trent et the machine, as shown in Fig. 1, and direct-ly under the path et the lilling hopper 17, Which is arranged to slide forwardly and rearwardly ena hated bottom plate 18, the side edges o t which serve as rails and for tl at purpose are embraced by the guides 19 carried by the hopper. The rearward move ment ot' the hopper is limitedby a trans verse stop 19a, composed ot a piece ot angle iron., and to limit its forward movement it is provided at each side with a longitudinally extending red 20 passing 'through an opening in the stop 19a and provided at its rear end with a pair of nuts 21 locked in ad `iusted position so as to arrest the hopper when the open bottom of the latter is in register with the open top et the mold.

For the purpose oi forming the openings in the bloelr l provide in rear of the mold a plurality oi' horizontal cores or plungers 24, Figs. 1 and d, arranged side by side in line with the openings 22 in the mold Wall 11, Fig. 9, through Which the plungers can be reeiprocated and at the same time rotated. lt will be understood that these openings are oft a size to permit tree movement of the plungers in and out ot the mold. To facilitate the advance ot the rotating piungers into the concrete in the mold their forward ends may be termed with beveled radially offset cutters 25. The plungers or cores are preferably made oiB tubing, in which case the cutting ends may be in the torm of removable heads, as 26, Fig. 8, tor convenient replacement when Worn. rlhe plungers themselves are mounted to rotate in a bearing block 27 on a longitudinally movable carriage 28 and at their rear ends they are threaded on studs 9,9 which are themselves rotatably mounted in bearings 30 on the aforesaid carriage 28. The plungers can thus be adjusted individually on their re spective studs and each, after adjustment, can be locked to its stud by a 'tapered pin hey 31 driven through `the longitudinal slots 32 in opposite sides oi the plunger and through the tapered hole in the stud.

The driving studs 29 (and With them the plungers 9.1) are rotated by means of pinions o3 lined on their rear ends and meshing vvith idler gears Slt which are themselves lThe operator now rotates i by a bevel pinion Ll() on the shaft 4l oit one of the idlers The pinions 38 engage parallel racks Ll2 arranged at the sides ot the machine, It will there tore he seen that as the driving' shatt Sti is rotated (by means, for example, ot the crank llf3) the plungers will be rotated and that at the same time the carriage Willrbe reciprocated, moving in one direction or the other according` to the direction of rotationfot the eriving; shaft.

f The racks l2 are mounted to have a limited sliding` movement in the hangers ll2l and lare 'held normally in their toi-ward position by contractile springs 42"; connected to pin-s 42 on the racks and to stationary ears 42d on lthe frame oll the machine.

At the sides of the i'nachine are two piv .oted arms 44;, having' counter'weights t5 and carrying a presser plate 46 ot such shape and size as to fit easily into thetop of the moldWhen, the hopper being` in the position shown in'Fig. l, the arms are swung' tor- Wardly and down by'means ot the handle 47, as in Fig. 3. The depth ot penetration of the' plate into the mold is limited, and made unitornnby a stop 48 on the underside of the handle. Y

` The operation ot the machine will now be readily understood. The parts beine,r in the positions'shown in Fig. l, a'suitable amount offconcrete is deposited in the hopper 17, which. is then drawn 'forward over the empty mold l0, as in Fig. 2, whereupon the concrete drops into the mold and lills the same. the drivine' shaft 36' by means of the handlel, therby rotating the plungers 24 and at the same time advancing them into the mold through the openings 22 in the rear wall thereof. When the carriage 28`reaches the stop-screws 28a adjustable in the rear Wall of .the mold the carriage and plungers are arrested, after which further rotation ot the pinions 38, by the driving' shaft, moves the racks 4t2 backl Wardly, such backward movement ot the latter being permitted by the stretching; of the springs 42h? which are preferably stili? enough to insure complete advance of the plungers against the maximumVV resistance offered by the concrete be'torethe springs yield. l This yielding' connection oit the'racks to thet'rameof Vtheimachine permits one or more revolutions oi the plungers after their advance is arrested, so that clean round hole-s are produced. It willV be understood thatl thevextent of the penetration ot' the plungers (into the mold)v depends upon the adjustment ot the dctcnt screws 28". lt these are so located as to cause arrest olE the plungers with their cutting heads 25 well clear ot the liront wall et' the mold, one face ot' the block or tile will he lett without openings7 to serve as the outer or exposed it'acc when the blorlrs are laid in a wall.

rthe operator now pushes` the hopper haelt to its rearward position over the bottom plate itl, as in Fig. l, and bringe the preaser plate Lle down, pressing); il into the mold as tar as it will gro. This cmnprrrscs the cou-- Crete slightly and determines the thiclncfs or the molded blocks, malviuog the successive blocks unitorm iu thirhn aa will he read ily understood. rThe operator now rotates the drivin.;Y shatt in the other direction, which retracts the plunfrers lo the position shown in Fig'. jl. than lets` thc presi-'cr (or sizing) plate swing` up. ail'tcr which the latch 14 is released and the mold opened permit-ting the pallet l5 and the mold hollow block lit), l0. to be li'lftcd oll'. ilu emptyY pallet liaviimbeen placed on lhc table the operations described above are repeated.

lt is to be understood that the invention is not limited to the specific construction herein illustrated and described but can be embodied in other forms without departure trom its spirit.

l claiml. ln amachine 'tor termine; concrete blocks, in combination, a mold open at the top and having an opening in one wall7 said mold being adapted to be filled with uncompacted concrete, means comprisinga hopper to receive concrete and movable to a position over the mold to deliver uncompacted concrete thereto7 and a device operable by the. machine through said wall opening to :form a. cavity in concrete in the mold with out compacting the concrete, surplus material displacedV during the cavity-forming operation being pushed above the top of the mold, said cavity-forminpr device compris ing;` a rotary plunger bearing' a cutting device on its forward end.

2, The combination oit' a mold having a plurality of openings in its rear wall, a carriage movable toward and from said rear wall, a plurality ol plunger?, rotatably mounted in the carriage and aligned with the said openings to enter the saule; means. including a driving` gear, mounted 'in said carriage and movable therewith to rotate the plungcrs; means actuated by the driving gear to advance and retract the carriage, and a. splined drivingshaft tor the driving gear to permit advance and retraction ot the carriage while the gear is being; rotated.

3. In a. machine for the purpose described, a horizontally movable carriage, a plurality ot plungers rotatably mounted therein and extending forwardly from the carriage, a,

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ll t) Leanne? driving shaft parallel With the path of the carriage, a driving gear mounted in the carriage and splined on the driving shalt to slide thereon While being rotated thereby, means connecting the driving gear and the piangere to rotate the latter, and means also actuated trom thedriving gear to advance and retract the carriage.`

4f. ln a machine 'for the purpoee described, a horizontally movable carriage, a plurality of plnngere rotatably n'ionntcd therein and extending` tforwardly vfrom the carriage, a driving Shaft parallel with the path olf the carriage, a driving gear mounted. in the carriage and aplined on the driving Shaft to slide thereon While being rotated thereby, means connecting the driving gear and the plungere to rotate the latter, racks along eide of the path ,of the carriage, pinione mounted in the carriage and meshing with the racks, and means connecting the pinione and the driving gear to rotate the former and thereby advance and retract the carn riage.

5. In a machine for the purpoae described, a horizontally movable carriage, a plurality oli piangere rotatably mounted therein and extending forwardly from the carriage, a .driving shaft parallel With the path of the carriage, a driving gear mounted in the car riage and eplined on the driving shaft to slide thereon While being rotated thereby, pinione at the rear of the plungers to rotate the latter, idler gears meshing with the driving gear and pinions to rotate the latter, racks alongside of the path of the carriage, pinione mounted in the carriage and meshing with the racks, and gearing connectingl the laat mentioned pinione and one of said idlere te rotate said pinione land thereby advance and retract the carriaoe.

6. In a. machine for the purpose described, in mnnbination, a block mold, a carriage movable toward and from the mold, plung ere inormted in the carriage to enter the mold ae the carriage ia advanced, means for i:*otating the piangere While the carriage ad In.ncing, racks alongside of the path oli the carriage, pinione mounted in the carringe and meshing with the racks, and con-- nected with. said plunger-rotating means for actuation simultaneously therewith, and yielding means connected with the racks to permit backward movement thereof when the carriage is at the limit of its forward travel.

In testimony whereof I hereto affix my signature.

VALENTINE DAHL.