US1512974A - Cement-block machine - Google Patents

Description

Patented Oct. 28, 1924.

NITED' STATES HERMAN BE SSER AND JESSE H. BESS ER, OF ALPENA, MICHIGAN.

CEMENT-BLOCK MACHINE.

Application filed August 4, 1923. Serial No. 655,648.

To all whom it may concern:

Be it known that we, HERMAN BESSER and Jnssn H. Bnssnn, residents of the city of Alpena, in the county of Alpena and State of Michigan, and citizens of the United States, have invented certain new and useful Improvements in Cement-Block Machines, of which the following is a specification.

Our invention relates to cement block machines and more especially to the class in which removable cores and plates are actuated toward and from the mold, certain of these plates being used both at the ends of the mold and, when it is desired to divide the same into a plurality of blocks, at an intermediate point, the plates being removable with certain of the cores.

It is an object of our invention to operate the various cores and plates by a single hand lever which heretofore has necessitated the removal of all parts at one time thus requiring great strength and labor in actuation, as well as tending to injure the product in the mold. In overcoming these disadvantages, it is our purpose to operate these devices by the usual single lever but, by the provision of certain connecting elements, start the withdrawal of the various core and plate units automatically at predetermined intervals, so that a part only of said units are started in said withdrawal at one time.

It is a further object of our machine to actuate the core plungers by means of a common transverse bar having apertures or slots of different sizes for receiving therein the ends of pins fixed to the plungers, so that, as the bar moves, these pins and with them the cores and plates will be actuated at different intervals.

We attain these and other objects of our invention by the construction hereinafter claimed and described, and illustrated in the drawings in whieh- Figure 1 is a plan view of our invention, showing the cores and plungers in their advanced position, and with the top plate re moved;

Figure 9. is a view similar to Fig. 1, but with the cores withdrawn;

. Figure 3 is a side elevation of the. machine;

Figure 4 is a longitudinal section as shown along the line 4:4 of Fig.1, and

Figure 5 is aperspective view of adouble block formed by our machine.

Referring to the structure in detail, similar reference characters designating like parts throughout the specification and drawlugs, represents the frame in general, the same being of quite usual construction, suitable side, end, and cross pieces being used to support the mold walls and actuating means for the cores and dividing plates, 11 designates a swinging plate, usually metal, pivoted to the frame at 12, andheld vertical during the block formation, but providing for swinging downward to horizontal position as shown in dotted lines in Fig. 3 whenthe blocks are to be released. Upon the bench plate 13 is supported rip-standing posts 14 bearing above them the cross plate 15 which serves as the base for the mold cavity. V l

Upon the outer edge of 15 is removably supported the pallet 16 which in turn is supported in position at the back by the plate 11. Since the parts 11 and 13 to 16 may swing together on a common pivot 12, it is evident that in the lowered position, ,as shown in Fig. .3. the formed blocks will rest upon the pallet which may be removed manually carrying the blocks with it. The rear plate of the mold cavity is represented by the part 17 which is fixed to the frame at either side of the machine, and is apertured to receive there-through the cores 18 and plates 19. It will be noted that the end plates 19 are secured to half cores 20 while the intermediate plate 19 is usually formed integral with the central core 21, so that by this construction two blocks may be formed by the use of three plates. two half cores and three full size cores. Of course, the machine may be expanded to produce a larger number of blocks at the same time by the use of more dividing plates; and the number of hollow spaces within each block increased by multiplying the number of cores used.

These cores and plates are .quite securely attached to the ends of plungers 22 which extend rearwardly for connection with a common actuating mechanism. As the plungers are withdrawn, the cores are pulled back through the apertures 24 of the plate, 17, so'that the molded blocks are ready for removal. It will be. apparent that quite strong force is required to start'withdrawal of a plurality of cores and plates-especially of five or more cores and three plates, as are illustrated in this case. This is due to the molding of the plastic material about I difference between the size of follow in order.

hollow but have one closed end '23 to which the plungers 22 may be secured, and said closure 23 is apertured at 25 to provide for entrance of to fill the vacuum otherwise caused by withdrawal of the core; then, means are provided for withdrawing the cores at different times with intervals between successive :actuations, though suchintermittent actuation is caused by a common source of energy, as will be later explained. The end half-cores 20 are also hollow and provided with the vent opening 25 as well as the others, and are integral withthe end plates 19, but are otherwise like th cores 18. The central core 21 is into, with the plate 19 which is divided and secured above and below to the core as fins, in the manner illustrated in the drawings.

For actuating the cores, the following mechanism is provided: Arbell-craulr lever 26 pivoted to the frame part 13- at 27. the latter being a transverse rock shaft to which is keyed the said lever at one end, and actuating arm 28 at the. other. Upon the upper side of the frame 10 above the plungers is shown a transverse bar 29 suitably guided for movement in direction longitudinal of the plungers 22. This bar has series of apertures 30, 31 and which receive loosely therethrough pins 33 car-ried by the plungers, sothat movement of the baractuates the various plungers and cores'but at different times. The arm 34 of the-lever and the arm 28 are operatively connected respectively to the ends of the said bar 29, by links 35 so that force applied to the lever will slide the 'plungers 22 in their guides and thereby actuate the cores in withdrawal from the; chamber as well as in inserting them when preparing for new molding operation. It is noted in this connection, that the pins 33 are smaller than apertures 31 and 32,'a nd that 31 is smaller than 32, so. that beginning the actuation of the lever 26 from the position of he parts as shown in Fig. 1, the aperture 30 will move t as parts '21 and 19* first, and the cores 18 and 20 will receive no impulse until core 21 has moved some'little distance depending on the apertures 30, 31 and32. After bar 29 has moved a short distance, cores 18 will begin rearward movement, and later cores 20 and plates 19 will /Vhen all'the cores and platesha've been withdrawn, they will take the relative position shown in Fig. 2. As the lever is moved to push the cores forward, for another molding operation the same relative movement of the p'lungers will occur but in the reverse direction. At the close of this movement, the forward ends of all the cores and plates will b in alinement V and substantially in contact with, the pallet 16'as shown in Fig. 1.

It will be obvious that when once the core is starte'dfin its rearward movement, there is much less diihculty in continuing the withdrawal 'fromthe pasty mass of material in which they are imbedded; so-that if once the rearward movement of the cores can be well established, little difficulty is experienced-in fully withdrawing them. -For this reason, it is only necessaryto provide the apertures referred toas illustrated. so that it will not be required to start all the plungers and cores at one time. it has been found byactual experiment, that the terval between the successive impulses exerted on the differentrplungers may not, be very large to attain the r esult desired. If, however. a greater difference in the time of starting should be found essential or expedient, the said apertures, shown in these views as circles should be changed to elongated slots extending in the direction of the length of the plungers, so that agreater difference in time interval would-be attained. While the slotted transverse bar and pin structure has been shown, and has been found exceedingly practical inuse,fma,n i modifications of such arrangement will occur to one skilled in the art, nowthattho general idea of the actuation is disclosed. For example, the bar '29' may itself carry? vertical pins, and the plungers provided with side blocks attached thereto against which the pins would hear as the bar is movedrearwa-rdly. It will also at once be obvious that the reverse arrangement of slots and pins shown in Figs. 1 and 2inay be used, the pins being carriedv by the bar. and the slots or apertures being drilled through the p-lungers. It will be readily understood that these. and other changes inthe relative arrangement and construe tion of the various parts of our improved block machine can be made and substituted for those herein shown and described, with out departing from the spirit-ref our in ventio-n, the scope of which is set forth in the appended claims.

eclaim:

I 1. A cement block. machine having a mold chamber, cores movable into and out from said chamber, a. supporting frame, a swinging member pivoted to said frame, and means connected with said member whereby continuous movement of said member in either direction will actuate the several cores in a predetermined succession. V

2. A cement blockmachine having a mold chamber the rear wall of said chamber having a plurality of aligned openings, cores fitting said openings and movable therethrough into and out of said chamber, said cores being hollow and having one closed end provided with a vent aperture, a supporting frame, a swinging member pivoted to said frame and means connected with said member for actuating the several cores in a predetermined succession.

3. A cement block machine having a mold chamber and cores movable into and out of said chamber, said cores being hollow and having one closed end, said end having a vent aperture through the closure, a supporting frame, slidable plungers guided in said frame and fixed at-one end to the closed ends of the cores, a bell-crank lever pivoted on the side of said frame and means connected with one arm of said lever for actuating the several plungers and thereby the cores in a predetermined succession.

at. In a cement block machine having a mold chamber, the combination of a series of cores movable into and out of said chamber in lateral alignment, slidable plungers each fixed to a core, means for guiding the plungers in their longitudinal movement, protuberances on said plungers for actuating them, a supporting frame, a transverse rock shaft pivoted in said frame, a lever keyed to said shaft, for rocking the latter, and means connected with said shaft and contacting said protuberances for actuating the several cores in predetermined succession.

5. In a cement block machine having a mold chamber and cores movable into and from said chamber, the combination with slidable plungers each fixed to a corresponding core, and means for guiding the bars and thereby the cores in the same direction as the latter, a frame for supporting the said chamber, cores and plungers, a lever pivoted on the side of said frame, means connecting one end of said lever to said transverse bar for actuating the latter, and means connecting the plungers with said transverse bar whereby the several plungers will be moved in a predetermined succession.

6. In a cement block machine having a mold chamber, the combination of a series of cores movable into and out from said chamber in lateral alignment, vertical plates integral with the end cores, a dividing plate fixed to one of the intermediate cores, slidable plungers each fixed to a core and guided for longitudinal movement, a supporting frame, a transverse bar adjacent the plungers and slidable toward and from said chamber a lever pivoted on the side of said frame, means connecting the plungers with said transverse bar whereby the continuous operation of the lever in either direction will first actuate the core and dividing plate, after an appreciable interval will start the operation of the intermediate cores and last of all the end cores'and plates and thereafter continue the movement of all the cores and plates together as a unit.

7. In acement block machine having a mold chamber and cores movable into and from said chamber, the combination with slidable plungers each fixed to a corresponding core and means for guiding the plungers in their longitudinal movement, of a transverse bar adjacent the plungers and movable in the same direction as the latter, and having a plurality of apertures there-through of different size, there being an aperture adjacent each plunger, a frame for supporting said chamber, cores and plungers, and a lever pivoted on the side of said frame, means connecting one end of said lever to said transverse bar for actuating the latter, and means fixed to the plungers and extending loosely through the said apertures in the transverse bar whereby movement of the lever will operate the several plungers and thereby the cores in predetermined succes sion.

8. In a cement block machine having a mold chamber and cores movable into and from said chamber, the combination with slidable plungers each fixed to a corresponding core and means for guiding the plungers in their longitudinal movement, of a transverse bar adjacent theplungers and movable in the same direction as the latter, and having a plurality of apertures therethrough of different size, there being an aperture adjacent each plunger, a frame for supporting said chamber, cores and plungers, a transverse rock shaft pivoted in said frame, an arm keyed to said shaft at one end and a lever at the other, links connecting one end of said lever and the arm to the ends of said transverse bar for actuating the latter, and pins secured to the plungers and extending loosely through the said apertures in the transverse bar whereby movement of the lever will operate the several plungers and thereby the cores in predetermined succession.

In testimony whereof we hereunto affix our signatures HERMAN BESSER. JESSE H. BESSER.

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