US1936216A - Block making machine - Google Patents

Description

NOV. 21, STRAUB ET A 1,936,216

BLOCK MAKING MACHINE 'Filed Jan. 19', 1931 2 Sheets-Sheet i 'INV NTORS.

if $72405. JM MflZSH/ILL. y x 5. 4. YPHEQS'.

j WAD ATTORNEY vide, in such a machine, means whereby one face of the mold block is chamfered or beveled, at one:

Patented Nov. 21, 1933 Francis 'J. Straub, New attention, ,John M.

Marshall and Samuel Leonard Cypl'iers, Phila delphia, Pal, assignor sfto Cro'zier-Straub, Inc.,

New Y0rk,iN. Y., a corporation of Ne'w York. 'Applicationlanuaryiw,1931. Serial No. 509,626

14 cl ims.

Our invention refers to improvements in" a machine for molding building blocks and the-like from plastic material by tamping action within a suitable forming mold. In such machines, as commonly used, the aggregate is delivered to" the interior of the mold box, usuallyaround one or more cores, and then subjected tothe compres' sing action of suitable tamps. The bottom of the mold is usually open and closed underneath by a supporting pallet of suitable constructionyupon which the molded block rests when ejected from the mold, and by which it maybe removed 'for drying and storage. 7

Such machines, of different standard forms,

utilize different forms of mold, cores, tamps, feeding apparatus, and other features of well known construction and use in the art, and are well" known and understood by thosefarniliar with the V manufacture of concrete blocks, slabs, etc.

The object of the present invention is t'o pro-,

or both opposite sides, so as to provide an inter;

vening clearance groove between adjacent'blocks supported by interior contactwith'eachjother.

The object of such construction binding or closing material, afterthe wall been laid up and is otherwise self-supporting. The inventionalso includesmeans' io'r'p'rovid f ing similar vertical grooves between the ends, of

adjacent blocks, either or both-formsof grooves being available as desired. a I v a a Whilethe inventionis capable of adaptation groove-space forming elements. I V In the drawings illustrating one'preferred'embodiment of the invention I I Fig. -1 is a vertical sectional view'showing'the 1 mold filled with" aggregate, with the stripper heads retracted preparatory'to ejection of the molded block;

Fig. 2 is a similar view showing thestripper heads swung into registering position "and the feed hopper withdrawn; c

Fig. 3 is a similar view shoWing-themoldelevated above the ejected block; I

Fig. 4 isan enlarged'view of the under side otthe mold showing the groove-space forming 'sto providefiir a resulting wall, a series of continuousopen grooves for reception of mortar, cement, or other of the mold and the actuating mechanism for the groove-space forming members in co-operative relationjto the feed hopper;

'Fig.' 6 is 'a'detailplan view of the opening and lrlosing dogs for the groove-space forming mem- I Fig. 7 Ba view in perspective of one of the finished blocks having a pair of oppositely 10- cated groove space bevels;

Fig.8 is a detail sectional view showing a modified' form of blade.

Referring'totheblock A illustrated in Fig. 7, it is'generally o'iusual'no'rmal construction and ing opposite parallel 'j side vwalls and opposite ;parallel"top' and bottom Wall's, and one or more transverse core openings of well known form. One of th'e'top or bottom faces a is of a width less. than the i ull'wid'th of the block, for bearing 1 contact againstan adjacent block, for load support; The iace'uis'pf a ,widthsomewhat less than the "fullwidth and terminatesat one or both sides in a beveled or: sloping face" 2, whereby to 'providejthe desirable resulting groove or longitu dinal clearance space when'the blocks are placed in position. '1 Lilrewise ior the same purpose the ends of the blocks arefprefera'bly beveled as at 3" at, one or both sides leavinga similar vertical space or I spac "r when'the blocks are in endwise'contact at thei1 maximum length middle portion. The formation of such longitudinal and vertical spaceforming faces'isf secured by means of the improved construction herein illustrated and now described; v

f Referring to Figsffl" to 3 inclusivathe moldwl is so mounted and connected with elevating mechanisnnnot herein necessarily illustrated or described, that it may be lowered to filling and ta'mping position asin Figs. 1' and 2 and elevated I for ejection of. the molded block, asin Fig. 3.

A feedhopper'5 of well known construction is sl'idablj mountedon a platform 6,. below the discharge gate or spout of a superimposed bin 7, from which the aggregate may be delivered to the feed hopper in any desired quantity. The feed hopper'is adapted to be movedforwardly over themold for filling and tamping, as inFig. 1, and tobe withdrawn backwardly on platform 6,"when*the' stripper heads 8 are thrown into resisting position, as in Fig. 2. Such head'sare mounted on the lower portion form, approximately rectangular in shape, havof supporting swinging arms 9 pivoted at 10 and actuated through suitable mechanism, not shown.

A series of tampers 11 are also arranged for suitable operation, with provision for clearance between the stripper heads and the upwardly moving cores 12 of the machine. The latter are mounted by suitable means, as cross supporting bars 13 and proper elevating and lowering mechanism, also of well known construction and use.

A pallet 14 of thin metal, wood, or other suitable material, is supported upon a stationary foundation or frame of the machine, against which pallet the aggregate b of the block to be formed is compacted within the mold under action of the tamps 11. Such tamps act for a short period to evenly compress the aggregate around the cores within the mold until it is filled; after which the feed hopper 5 and any surplus material therein is withdrawn.

The space-forming elements for shaping the under side edge or edges of the block consist of one or a pair of laterally adjustable blades or 'tion during tamping and retracted out of position during elevation of the mold and ejection of the block.

Referring now to Figs. 4, 5 and 6, the mechanism for thus adjusting the plates 15 is shown. They aremounted longitudinally along each opposite under side of mold 4 for inward and outward sliding movement between lower supporting cross bars 17, properly positioned beyond the maximum operative length or" the mold at each end, and movable upwardly and downwardly therewith.

Extending outwardly from such cross bars 17, at each opposite end are brackets '18, bolted or otherwise secured to bars 17 providing outwardly extending pivotal bearings 19 for vertically arranged rotatable rods 20. Such rods are each provided at their lower ends with a lever 21 pivotally connected at opposite ends 22 with links 23, which links are pivotally connected at 24 by a bolt or other suitable pivot, with the ends of beveling 'plate 15.

Such mechanism is duplicated at each end, of the mold, and at its upper end each pivoting rod 20 is provided with an actuating dog or lever 25. Such dog, as shown in Fig. 6, is of V form so as to be operatively engaged between its oppositely disposed prongs 26 by the downwardly extending stud 27 of an arm or bracket 28. Such arm is" fixedly mounted in' any suitable manner, as by an extension 29, on each opposite side of the feed hopper 5.

Thus, when the feed hopper moves outwardly tion, as in Fig. 1.

It will thus be observed that the operative parts will be actuated in synchronism so as to locate the bevel plates as a portion of the bottom of the mold 4 during tamping, and, to. retract them out of register with any portion of the molded block, for upward discharging movement of the mold, as in Fig. 3.

When the block has been formed and the mold is about to be elevated, the stripper heads 8 are thrown inwardly to resisting position, holding the block against movement during elevation of the mold, for free release, as in Fig. 3.

The end walls 30 of the mold are outwardly sloping from each side towards the middle, providing the inner faces 31 for forming the bevel faces 3 of the block. End walls 34) are cut away, as at 32, for clearance of the inner edges of plates 15 to the extent of their inward movement. Thus, Fig. 4 shows the blades extended with their inner edges practically flush with the inner face of the side Walls of the mold, as at 33, and movable by their levers to the inwardly thrust dotted line position 34. 7

It will be understood of course that if the horizontal clearance grooves are desired at one side only of the block, a single plate 15 may be used at such side only, omitting the blade and its lever connections at the other side, for full square corner formation in the usual manner against'lQQ the pallet. Also, that if the vertical bevel 3 is likewise desiredat one side only of the ends of the block, the end walls 30 will be correspondingly beveled and rectangular respectively at opposite sides of the middle of the end walls.

It will be obvious also that in placeof the. beveled plate 15 the groove space may be rectangular by using a parallel sided blade 15, as in Fig. 8.

The construction'and operation of the invention will be readily understood and appreciated from. the foregoing description.

The several partsare in such operative relation as to effect the forming and ejection of the blocks.

in a continuously rapid and efllcient manner, 115;

while the action of the bevel plate or plates results in a comparatively smooth, finished, completely efficient beveled face from one end of the block to the other;

It will be understood that other means for actu 1201 ating the bevel-forming means may be utilized,

.or that the invention may be variously changed or'modified to adapt it to varying conditions or dilferent types of block making machines, or

otherwise modified by the skilled mechanic, but 125,- that all such changes are to be understood as within the scope of the following claims.

What we claim is; 1. In combination with an upwardly movable laterally immovable open top and bottom mold 1- and means actuated by the feed hopper for movl ing the beveling plate inwardly and outwardly. 2. In combination with an upwardly movable laterally immovable open top and bottom mold and a supporting pallet, a laterally movable resisting stripper head, and a laterally movable 1 feed hopper; a beveling plate on the. mold later-, lly movable between the bottom of, the mold and the pallet, lever mechanism mounted on the mold for moving the beveling plate inwardly and outwardly, and an'actuating element therefor on the 1 feed hopper.

3. In a block, forming machine the combination of a vertically movable open top, and bottom mold, independently movable beveling plates dapted to. bem ieeted and retracted below the mold walls, lever mechanism mounted on opposite terminals of the mold for moving said plates inwardly and outwardly, a shaft for each of said mechanisms having a shifting dog, a laterally movable hopper for filling the mold, and an abutment on the hopper engageable with the shifting dog.

A. In a block forming machine tion of, a vertically movable open top and bottom mold, independently movable beveling plates adapted to be projected and retracted. below the .mold walls, lever mechanism mounted on opposite terminals of the mold for moving said plates inwardly and outwardly, a shaft for each of said mechanisms having a shifting dog, a laterally movable hopper for filling the mold, an abutment on the hopper engageable with the shifting dog, and a laterally movable resisting stripper head adapted to register with the molded block within the mold.

5. In a block forming machine the combination of a vertically movable open top and bottom mold having parallel side walls and inwardly sloping end walls provided with clearance openings, independently movable beveling plates adapted to be projected and retracted below the side walls and through the clearance openings of the end walls, lever mechanism mounted on opposite terminals of the mold for moving said plates inwardly and outwardly, a shaft for each of said mechanisms having a shifting dog, a laterally movable hopper for filling the mold, and an abutment on the hopper engageable with the shifting dog.

6. The combination with a vertically movable open top and bottom block forming mold having a relatively movable forming plate carried by the mold, or" a laterally movable resisting stripper head adapted to register with the molded block within the mold to eiiect discharge of'the block when the mold is elevated.

7. In a block forming'machine, thecombination of a vertically movable open top and bottom mold, an independently movable beveling plate adapted to be projected and retracted below one side wall of the mold, lever mechanism mounted on opposite ends of the mold for moving the plate inwardly and outwardly, a shaft for each of said mechanisms having a shifting dog, a laterally movable hopper for filling the mold, and an abutment on the hopper engageable with the shifting dog. I 8. The combination with a vertically movable open top and bottom block forming mold and a laterally movable feed hopper, of a relatively movable forming plate carried by the movable mold operable across the plane of movement of the mold, and means actuated bythe feed hopper for moving the forming plate.

9. The combination with a vertically movable the combinaopen top and bottom block forming mold and a laterally movable feed hopper, of a horizontally movable forming plate carried by the movable mold, means on the mold for moving the forming plate inwardly and outwardly, and means on the feed hopper for actuating said means.

10. The combination with a vertically movable. open top and bottom block forming mold and a laterally movable feed hopper, of a relatively movable forming plate extendible inwardly partway of the open area of the mold across the plane of the movement of the mold and movable with the mold'upwardly and downwardly, actuating means for the forming plate on the mold, and a co-operating actuating element on the feed hopper.

11. The combination with a vertically movable open top and bottom block forming mold and a laterally movable feed hopper, of a horizontally movable forming plate having a beveled forming face operatively mounted on and movable with the, mold and across the plane of movement of the mold, and means on the mold actu ated by the feed hopper, or moving the forming plate.

12. The combination with a vertically movable open top and bottom block forming mold and a laterally movable feed hopper, of a relatively movable forming plate carried by the movable mold operable across the plane of movement of the mold, and means actuated by the .feed hopper for moving the forming plate inwardly and outwardly conformably with feed hopper movement.

13. The combination with avertically movable open top and bottom block forming mold and a laterally movable feed hopper, of a pair of oppositely located inwardly and outwardly movable forming plates each having an upper inner beveled edge portion, said plates being mounted on'and movable with the mold and across the plane of movement of the mold, and means on the mold actuated by the feed'hopper for moving the forming plates.

14. The combination with a vertically movable open top and bottom block forming mold and a laterally movable feed hopper, of a pair of oppositely located horizontally arranged inwardly and outwardly movable forming plates each having an upper inner beveled edge portion, said plates beingmounted on and movable with the 'mold and across the'plane of movement of the mold, lever mechanism on each end of the mold connected with the ends of the plates and provided with terminal dogs, and abutments carried by the feed hopper adapted to engage said dogs. FRANCIS J. STRAUB. JOHN M. MARSHALL.

S. LEONARD CYPHERS.

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