US1849889A - Block molding machine - Google Patents

Description

March i5, 1932. F J. STRAUB 1,849,889

BLOCK MOLDING MACHINE Filed Nov. 16, 1928 2 Sheets-$116613 l Mmh 15, 1932. F. J. STRAUB 1,849,889

BLOCK MOLDING MACHINE Filed Nov. 16, 1928 2 Sheets-Sheet 2 Patented Mar. 15, 1932 FRANCISLJ. ,similia or NEW.Kammerer;{PENNsYnvANmfj j BLOCK MoLniNGMAcnrNE "l y applicati@ iednovember 16,1928. semaine: 319,901.

My invention relatesto improvements in mold-ing machines -for concrete building blocks and thelike.-

In the manufacture of` such 1iblocks,any suit? 5j able aggregate mixed with water and a bindingy material, as cement, and of proper con! sistency, is ordinarilyA charged` into the interior of a forming mold and therein subjected to the tamping action ofany'suitable means, as reciprocable tamps, for packing the aggregate successively from the bottom or top, as it is charged into the mold. A

The operation is generally the same, whether the entire cavity of the mold is filled, or

whether the" aggregate' is iilled within the ymold around upstanding cores for the formaof transverse openings Ain thev finished I have found that in such Operation, utiliz- A- ing molds of the usual construction, certain portions of the block iailto receive suiiicient compression'to' form blocks of uniform density thr.oughout,the lowerv outer edge por-v tions of the block being frequently t'oo open or incomplete, due to'failure ofthe-aggregate to completely and vsolidly iill such por-` tions. v V My invention has in View to overcome such inequality and lack of density by means ofV 30 movable walls, adapted to inwardly compress the opposite sides or end portions of the block laterally, whereby to vcompensate for such lack of compression and torenderthe block throughout of uniform consistencyand solidity. Y 1

One preferred embodiment of the-invention is illustrated in the enclosed drawings, which show the mold portion of an entire block making machine, certain other standard features of which, as elevating and discharging mechanism, being omitted, in which Fig. 1 is a plan view of one form of plural chambered molding machine provided with my invention;

Fig. 2 is a view of the same in end elevation;

Fig. 3 is a view of the machine in side elevation;

Fig. 4 is a transverse vertical section on the line Ivi-IV of Fig. l.

Referring tothedrawings, `2 are' the mainf end plates or frames of the machine, at the: upper portion of whichy areprovided Ioneor more molding cavities 3. These, as shown, p are plural in number, extending between the ,55K4 end plates `2withtransverse divisiongplates 4 at intervals, defining' thewidth of the fblockf l to be formed, as will be readily' understood. V

Partition plates 4 may be'permanent uor removable `as desired, and mounted `in any suitable mannen providing smooth-faced walls between which the Aag-gregatermay be charged -andtamped upon the usual supporting pallet 5, first laidin the bottom offthe mold cavity.

` The end walls 6, whichv may beiaced with an'inne'rsheet metal lining 7 if: desired,V` are: pivotally mounted at their upperportions upon transversesupporting bars 8f at each opposite side of the machine, andv are capable of inward VV'and outward swinging movement thereon, under] the actuating effect `oi f means adapted to'throw the walls outwardly or in-v v wardly ateac'hisidesimultaneously.l wf

For such purpose, `l; utilize suitably designed cams or eccentrics-9, mounted on actu-` ating shafts 10 to which they are keyed f or otherwise secured for rotative movement by' rotation of the shaft'lO. Said-'shafts are'provided, one with a' hand operating leverflland a shortlever 12 and 13 respectively,v one for eachshaft. j

4-Levers`12 and 13 areI connected by a bar 14, so that as thehand lever 11 is operated it'will transmit a corresponding movement through lever 12 and connection 14 to lever 13so that bothfshafts lO will be rotatedf together, but inthe opp'ositedirection. v.Such opposite di'- rection movement .isI easilyaccompli'shed/ by 9o arranging one of thelevers,downwardlyl and the other upwardly, asshow'n in Fig. `2.v j j Each wall- 6 is provided atits outerside with a keeper or guard 15,f,bolted or screwed y to the outer side of the mold wall 6, as at;16. 95 The brackets orguards as thus made extend p downwardly and outwardly within range: of the eXtendedportions of cams. 9,- so that when they are Athrown outward-lyby .properv lever 'Ici Y action, the side-rwallsiv 'kwill s'be -correspondp100 ingly swung outwardly on their pivoting supporting ars 8, as in Fig. 4.

' When'the lever is reversed, as to the position shown in Fig. 2, then the cams are rotated in the opposite direction and bear inwardly against the lower face portions of the sideG, thrusting them. inwardly to vertical position, whereby to vdefine perpendicular limiting faces for the block in formation.

It will thus be seen that while the upper .area of'the mold cavity in each case is sub? stantially unvarying, the lower-'portion may be materially decreased by such inward movement of the walls, soY that they ends are brought into parallelism for forming a rectangular block, which mayjrvbe then ejected upwardly.A Y

he desirable eEect ofksuch inward movement of the walls is to compress the aggregate at the lower edge portions of the b-lock, in-Y creasing its density, filling out any voids, and

resulting in a substantially uniform block-v formationthro,ughout.

The cam actuation'of the mold walls may be supplemental.Y to the filling and tamping operation, or theymay be gradually adjusted inwardly as the tamping progresses, dependent o n conditions, consistency of the aggregate, or other controlling factors.

If it is desired to use the mold in the ordinary manner, the cams may be set inwardly so as to maintain the walls vertical throughoutV the filling and' taniping operation inthe manner of an ordinary mold.

Y It will beunderstood that the hand .lever operation of shafts 10 may be substitutedb-y anyf power operated mechanism, or foot j treadle device, whereby to effect the vdesired,

inward and outwardv movement to the end walls. 1

Y Also that the machine.may be variously changed ory modified in detail construction as. to application of movement toeither pair of walls, i. e-.,-end or side, or by designing different Vparts of the machine to adaptit to any special shape, size, lor design of block, but that all such changes are to be understood as within the province of the skilled mechanic. and the scope of the following claims.

, What I claim is:

f f1. In a molding machine provided lwithal.,

block-forming cavity, opposite end walls having a pivoting mounting support at their-upper portions between intervening side walls and means for swinging their lower portions outwardly between the side walls to oppositely sloping positions during "charging and inwardlyy to vertical compressing positions against the mold contents". z -f -1 E 2.In a molding machine provided with opposite conning simultaneously outwardly rectan ular open top and simultaneously inwardlyswinging side walls each having a cam bracket, the combination therewithlof actuating cams between walls each having a cam yOf, a pair ing movable walls having a pivoted mount-vk Yin opposite directions. j n 3. n a molding machine provided with opposite confining simultaneously outwardly and simultaneously inwardly swinging side bracket, the combination therewith of actuating cams between each wall and-its-bracket forimparting in- Ward and outward movement to the walls,

lshafts for said cams, and lever mechanism for actuating the shafts andv cams together to engage the walls and brackets respectively in opposite directions.

4. yIn a molding,machine,.thecombinationY with fixed side walls anda supporting bottom, of adjustable end walls pivotally mounted at' their upperV portions between the side walls ,for outward' andl inward movement therebetween, Yeach end wall having an,V outf bracket, a pairof ac wardly extending cam each having a cam lotuating shafts therefor cated between oneof said walls and its brack-' et, and fmeans forractuating both of'said shafts and their cams together.

5. In a molding machine, the

with fixed side walls and a supporting bottom, of adjustable end walls pivotally mount-YV edl at their upper portionsbetween the side wallsV for outwardjand inward movement combination therebetween, each endf wall having an outwardly extending cam bracketa pair of actuating shafts therefor each having a cam locatedbetween one of said walls and vits brack-` et, a leverl on each shaft, alink connecting said levers, and an operating lever on one of said shafts. Y v f 6. In a molding machine, the combination of opposite iixed walls, intervensignature..V Y

FRANCIS J. STRAUB.

Images