US1474813A - Means for use in the molding of concrete building blocks - Google Patents

Description

Nov. 20,1923. mgsm J. T. BROWNE ET AL MEANS FOR USE IN THE MOLDING OF CONCRETE BUILDING BLOCKS Original Filed June 50 1921 2 sheet -Shee 1 Nov. 20, 1923. mmsm J. T. BROWNE ET AL MEANS FOR USE IN THE MOLDING OF CONCRETE BUILDING BLOCKS Original Filed June 30, 1921 2 Sheets-Sheet 2 Patented Nov. 29, 1923.

JOHN THOMAS BRO'WNE AN D WILLIAM. BLACK, 01? HAMILTON, NEW ZEALAND.

MEANS FOR USE IN THE MOLDING [3F CONCRETE BUILDING BLOCKS.

Application filed June 30, 19%, Serial No. 481,535.

To aZZ whom it may concern:

Be it known that we, Jonn THOMAS BRowNn and WILLIAM Briton, subjects of the King of Great Britain, residing at Victoria Street, Hamilton, in the Dominion of New Zealand, have invented a new and useful Improvement in Means for Use in the Molding of Concrete Building Blocks, of which the following is a specification.

This invention has been devised in order to provide improvements in means for use in the molding of concrete building blocks. The means devised consist in a special construction of mould proper by the use of which the block is formed of two vertical slabs tied together by metallic reinforcing ties at an approved distance between their faces, so that the twin block thus formed may be used with others in the erection of cavity walls, and in a special construction of apparatus by means of which the mould may be removed clear of the block moulded within it, so that the block may be removed for drying.

In fully describing these means reference will be made to the accompanying sheets of drawings, in which Figure l is a plan of the mould in the assembled position ready for the casting of the block within it, the reinforcing ties also being in position.

Figure 2 is a side elevation half being shewn in section.

Fi 'ure 3 is a cross sectional elevation taken on the line 3-3 of Figure l and looking to the left of such line.

Figure 4 is a plan of one end of a mould as formed for the molding of a corner block.

Figure 5 is a plan of the ordinary block made in the mould shown in Figures 1 to 3.

Figure 6 is a plan of the corner block made in the mould shown in Figure 4.

Figure 7 is a side elevation of the mould lifting means shown in position ready to lift amould.

Figure 8 is an end elevation thereof.

Figure 9 is a plan thereof.

Figure 10 is a sectional plan thereof taken on the line 1010 of Figure 7.

Figure 11 is a cross sectional elevation thereof taken on the line 11-11 of Figure 10 and looking to the left ofsuch line.

The block to be formed in the mould, in its simplest form as shewn in Figure 5, con- Renewed October 12, 1923.

sists in the twin slabs A-A of the required height, thickness and length fastened together at an approved distance apart in a manner already known, and in the special construction shewn, joined together by two or more re-inforcing wires B arranged at convenient intervals in the height of the block. Each of these. wires is arranged to extend continuously throughout the length of both slabs and across the space between them at the respective ends. The wires as they cross from one slab to the other are given downward kinks or bends in order that any passage of moisture along the wires will be obviated.

in the corner block shewn in Figure 6, the outer slab A is made with a right angled extension A at one end that overlaps the end of the inner slab with the cavity space between, and finishes flush with the line of the inside face thereof. The space between the two slabs is thus continuous so that when the corner block is built into a wall with the other blocks butting on to its ends, the cavity will continue right round the corner in a continuous line.

The blocks are formed with any of the usual grouting jointing grooves a in their top and bottom and end surfaces.

The mould proper is formed by plates of wood, iron or other approved material and consists in two side plates C of the required length and height and two end plates D of the same height and of the length necessary to correspond with the width of the full block. These are adapted to be assembled upon a pallet plate E to form the casting mould and are locked together in the rectangular form. by the formation of the side edges of each end plate with tongues D extending therefrom, which tongues pass through mortise slots C in the side plates and then have wedges d driven laterally through them and up against the outside faces of the side plates. Thus the four members of the mould casing are firmly locked together. They may also be removed, when required, from around a moulded block.

The mould space thus enclosed is divided along its middle throughout the full length and height by a core of special construction designed to position and hold the reinforcing wires B in their places in the mould and to allow for the mould members being readily removed from around a moulded block.

This core for the straight blocks continues from end to end of the mould as shown in Figure 1, but for the corner block is shaped with a right angled turn leading on to the inner side plate near one end, as shewn in Figure l.

The core, as shown in Figures 1 to 3, is made up of two plates F of the full height of the mould and two end blocks G that are adapted to fit upon the inside of the mould ends D and to make joint with these plates F. Such plates are distanced apart the requisite distance by means of vertical distance, bars H that pass through apertures in the pallet E and are footstepped into the surface of the molding bench J upon which such pallet rests.

Each block G is made with a groove 9 in its outside edge which slides on to a tongue 03. fixed vertically upon the inside of the adjacent mould end. On its inside face it is formed with a wide deep groove G down its full length adapted to receive the adja cent distance bar H. Each edge thus formed on each side of this groove is made with a bevelled surface adapted to engage with beveled ends of the corresponding plates F so that they interlock and hold the said plates from falling inwards into the molding spaces between them and the sides of the mould. v

The edges of the block G on each side of the groove G are also formed with slots g extending transversely across them at the requisite heights and extending in for the neces sary distances, which slots are adapted to accommodate the wires B in their assembly in the mould. The width of the groove G is such as to allow of the wires being given their downward curve as they cross the core width, before assembly in the mould and then for such curved'portions lying within the groove, as shown. clearly in Figure 3. The mould thus formed is assembled by first arranging the casing in position with the end blocks G upon the respective end plates. The wires 13 are then laid in their respective slots, the corev plates F placed in position and the distance bars H passed down between them. The mould is then ready for casting and the concrete is poured into the: spaces on the respective sides'of the core. When it has set sufficiently, the casing is removed from round it, the distance bars I-I lifted clear and the blocks G which had been left in the concrete then drawn outwards from the ends thus clearing the wires B. This frees also the core plates F which may then be lifted out, leaving the block standing free upon its pallet E so that it may be removed thereon for stacking and drying and curing in the. usual way. r

The" same general features of construction govern the core required for the corner block andas shown in Figure 4. In this however, the block G is keyed on to one of the side plates C and is made in two parts between which the wires B pass, and the inside half of the double block looks with a vertical block I: connecting the ends of the plates F and shaped to fit over thedistance bar H. V V

In assembling this core the two block halves G are arranged in position upon the respective sides of the wires, the. block K then placed in position, the plates F arranged in relation thereto and the distance bar passed down to hold them all in their relative positions. The parts are disassembled after the molding and setting of the block by a reversal of these operations.

The blocks and other parts of the mould are, where necessary, made with slight tapers in order to obtain a free draw away from the 111011.] ded blocks.

The mould thus madeis adapted to be used in conjunction with special means whereby it may be freed from the block moulded within it, with quickness and ease. Such means are designed to be moved about from mould to mould and in use to be placed iuposition over a mould and then to draw upward clear of the block the whole of the mould casing and the distance bars, leaving the blocks G in position so that they have merely to be drawn out from the ends and the plates F free so that they may be lifted clear, in order to remove the block on its pallet, and then to lower the parts lifted on to a fresh pallet.

These means are shown in position for operation in Figures 7 to 11. They comprise a framing formed by a pair of'standards M connected together at their upper ends by a main central cross bar N and by two side tie bars 0. The standards are positioned apart a distance such as to correspond with the outside length of the mould casing and each one is made of a width to fit in between the side plates of such casing. Consequently the frame may be arranged to fit over the mould in the manner shown in the drawings and to rest upon the pallet. and when in position to be held from movement in any horizontal direction by the engagement of its standards with the side and end plates of the mould.

A screw threaded rod P is provided and screwed vertically down through a threaded bearing in the centre of the main cross bar N. This rod supports a lifting. frameR at its lower end which frame comprises a transversely extending jbar R at each end which is positioned, approximately close above the corresponding end of the mould. It is made long enough to project at itsends beyond the sides of the mould, Upon each of the ends of the cross bar a long link S is suspended which link is adapted to pass over a pin 8 fixed to project outward from the'mould casing side and provided for that purpose. Another link is suspended from the middle of the bar and this is adapted to hook on to a pin '71, near the top end of the distance bar H at the corresponding end of the mould. Thus the lifting frame may be, when lowered, connected to the mould casing near each of its four corners, and to the two distance bars, so that when raised by the rotation of the screw P, it will lift these parts bodily with it.

To guide the frame in its up and down movements, a vertical guide rod T is fixed to each side cross bar 0 near each end thereof to extend downwards therefrom, and small guide pieces 2" are fixed to the frame R to engage the several rods. These rods also at their bottom ends are fixed to the two ejector plates U which are made of widths and lengths to correspond with and it within'the respective molding spaces of the mould. They thus serve to hold these plates in position and are made of such a length as to position the plates just above the level of the mould top. Consequently as the lifting frame moves upwards and lifts the mould casing, these plates will onter the molding spaces and engaging the top of the block members the-rein, will prevent the block being lifted and will in effect act as rams to force the block free of the mould.

Then when the block has been removed, the lifting frame is lowered again and the apparatus freed from the mould and lifted away for use upon another mould. The screw rod P is provided with the usual lever handle p for rotating it in the required manner.

We claim 1. A mould for use in the formation of concrete blocks formed by a mould casing constructed with sides and ends removably secured together, and a centrally extending core for dividing the casing space lengthwise into two, formed by two endblocks removably attached down the insides of the respective casing ends and each made with a deep groove extending down its inner face,

distance bar pieces fitting within the grooves of the respective end blocks, and two vertically extending core plates extending upon opposite sides of such distance pieces and interlocking at their ends with the inner edges of the corresponding end blocks, substantially as specified.

2. In a mould for use in the formation of concrete blocks constructed as described in claim 1, constructing each of the end blocks of the core'with slots extending transversely across its inner edges and inwards from such edges, substantially as and for the purposes specified.

3. In means for use in molding concrete blocks, a mould formed by a casing and a core extending through such casing and dividing its space lengthwise into two, and means for raising and lowering such casing consisting in a framework adapted to be fitted over the casing and comprising an overhead cross beam, extending longitudinally with the casing, a horizontally disposed lifting frame having means for its attachment to each corner of the casing, and a vertically disposed screw rod threaded through the said cross beam and having its lower end connected to the lifting frame, gublstantially as and for the purposes speci- 4. In the means for use in molding concrete blocks set forth in claim 3, the combination with the said raising and lowering means, of a pair of horizontally extending plates adapted to fit within the respective divisions of the mould casing, and vertical rods extending rigidly downward from the top of the framework and attached, at their lower ends to the said plates, substantially as and for the purposes specified.

In testimony whereof, we aihx our signa tures.

JOHN THOMAS BROWNE. WILLIAM BLACK. Witnesses:

DAVID BROWN HorroN, JOSEPH STANLEIGH MoAviN.

Images