Abstract:
Turning arrangement (2) for concrete products, paving stones/flagstones for paving, curb stones for delimiting and blocks for erecting walls are arranged in a row with uniform orientation (4), the products (4) are advanced to a turning arrangement where the individual concrete product (6) is turned by means of the force of gravity.
Abstract:
In connection with casting concrete blocks with cavities, e.g. foundation blocks, perforated blocks and elements with cavities, a moulding equipment including a bottom part (4) with casting cells with pendant core members (8) bolted on corresponding to the shape of the concrete block, and a top part (14) which have pressing plates (20) projecting downwards on support rods (18) and substantially corresponding to the shape of the casting cells, and so that the pressing plates (20) by stripping the items by vertical displacement of the bottom part (4) are passed down through the casting cells (6). By the invention is indicated a bottom part (4) that include means in the form of core members (8) bolted on, forming the defined cavities in the finished block/element. The core members (8) may either be releasably bolted onto the top plate (10) of the bottom part, or, alternatively, be suspended from a yoke (12) which is releasably fastened to the mould frame, and between the mould frame and the yoke there may be a vibration dampening shim. Core members (8) may furthermore be bolted on with a vibration dampening or compact shim (2).
Abstract:
A method for making mould equipment for concrete casting machines of the kind typically used for making block bricks for pavement and wall construction. The mould equipment includes a lower part (2) constituted by a mould table (4) in which is provided at least one cell divided mould insert (6) with cells (8) that are open upwards as well as downwards, the cells (8) defining the desired basic shape of individual bricks, and a corresponding upper part (10) that includes a top rail (14) from a top plate (12) and projecting downwards pressing pistons (16) in the shape of legs (18) provided with foot plates (20), the undersides of which include lower thrust plates (22) interacting with respective underlying cells (8) in the lower part (2) and thereby are useful counter hold for the castings during vibration and for downward ejection of the castings from the cells (8). The individual parts comprised by the mould equipment are cast in at least one casting process. The invention also relates to a mould equipment.
Abstract:
In machines for moulding block stones a cellular mould (8) is used underneath a compacting head (12) having press plates (16) that can be pressed down for compressing the concrete mass in the moulding cells (10) and for pressing out the moulded stone members when the mould is raised. The mould (18) is fixed to lower carrier means (24) and the compacting head (12) to an overlying carrier head (6) in a mutually accurately centered manner, which requires high accuracies in the making of holes for the spanner bolts, while also the mounting of the compacting head is difficult to carry out. According to the invention the compacting head is directly precentered in the mould (12) by means of distance pieces (52), and the entire mould unit (8, 12) thus preassembled, is moved into the space between the carrier head (6) and the carrier means (24) for the mould (8), whereafter the mould (8) is secured to the carrier means. By the insertion of the mould unit into the said space a 'floating' engagement is established between co-acting holding portions (44, 46) at the lower side of the carrier head (6), and upon fixation of the mould (2) working cylinders (48) are actuated to pull up the holding portions (46) of the carrier head for clamping the compacting head in its centered position. Thereafter the distance pieces are removed and the machine is ready for operation. Thus, the compacting head will be very easy to mount, and generally very coarse tolerances can be used.
Abstract:
At the casting of block stones in a cellular mould (8) it is customary to fill up the cells (30) completely with casting concrete, whereafter a holder-on (14) with load plates (18) corresponding to the cross section of the individual cells is pressed down against the mould for compression of the concrete in the individual cells. Hereby a uniform thickness of the cast members is achieved within a fairly extensive tolerance range, but not a uniform strength of these, as their contents of air varies. To achieve a prescribed strength of also the least compressed members, generally an overdose of cement for the concrete has to be used. By the invention a holder-on (14) is used, the load plates (18) of which are individually moveable in the pressure direction in such a manner that they will compress the concrete in the cells in a fairly similar way, i.e. for achievement of a fairly uniform strength of the members, which conditions a minimized admixture of cement. The compressed stone members will show mutually different heights, but it has been found that these height variations can be kept within the prescribed tolerance range of the stone height. The individual movability of the load plates (18) is obtained by these plates either being mounted on individual pressure cylinders or supported by springs such as rubber blocks (34).
Abstract:
A method and a device for machine patination, artificial ageing, of concrete products. The products (12) are provided irregular edges by a process in which the products are lifted up against a matrix (45) that substantially corresponds to the desired appearance, while at the same time the products are vibrated by a vibration system (52) and pressed by the matrices (45). The entire process occurs in-line on the production board (2) on which the products (12) have been poured before hardening, without any extra handling.
Abstract:
The system is peculiar in that there is provided a number of temperature sensors (14) inside a rotary dryer (2), the sensors (14) indicating a representative temperature of the materials dried/heated in the zone in which the sensor in question is located. By combining the measured temperatures with indications/measurements of flow, temperature and humidity of the materials to be dried, and temperature and humidity of the flue gas, a regulating unit/system with a simple mathematical model of the drying process may control the oil or gas burner optimally, such that the energy consumption for the drying process is minimised, and the waste of material occurring by too much or too little heating, typically by start and shutdown, is almost eliminated. The system may be used both by concurrent and countercurrent rotary dryers, respectively, and by single as well as double chambered rotary dryers, respectively, for drying and heating mineral materials, primarily for asphalt production.
Abstract:
Self-supporting intermediate walls (12) for cellular division of mould lower parts in a concrete casting machine of the kind typically used for making cast items in the form of concrete blocks for wall construction and elements, solid blocks or blocks with cavities or recesses in two or more rows. By the self-supporting design, the distance between rows of products may be reduced for better utilisation of the production plate while at the same time maintaining the replaceability of wear parts. By the invention is indicated a self-supporting intermediate wall (12) consisting of two halves, an intermediate wall with lower pins (18) and an intermediate wall with upper pins (20) which, when the two halves are assembled with the pins engaging a partitioning plate (8), form a self-supporting intermediate wall (12). For moulds with core supports (28), intermediate wall parts (22 and 23) are used with a recess (25) in which the boss (29) on the core support iron (28) fits.
Abstract:
Use of more exotic laying patterns in connection with establishing paving stones of concrete blocks for e.g. paving on yards, are not widely used for cost reasons, as the automated laying machines laying the said paving stones in large surfaces at a time require the stones to be delivered in palletised formats which are handled by machine. The only way in which the said stereotype formats can be laid by machine is, if the paving stones are supplied manually, patterned layers on pallets. There is thus indicated a method for automatic sorting of paving stones (2) of different size from bulk condition to e.g. patterned laid palletisable layers in a standard out format, as the stones (2) after being guided into a row (3) are registered by size by a vision based system and guided into arraying lanes (34) from where these may selectively be dispensed in the preferred laying patterns in the said out formats (22). Hereby is achieved a considerable reduction of the costs for establishing paving stones in exotic laying patterns, and it becomes furthermore possible to perform sorting of “rumbled” paving stones.
Abstract:
Concrete block stones are produced by moulding in a cellular mould comprising a support frame (2), the inner sides of which are covered by renewable wear plates (8) secured by bolting. By an associated vibration of the mould these plates are subjected to strong, upwardly directed forces, whereby the mounting bolts (6) are easily broken. In connection with the invention the wear plates (8,14) are extended downwardly and provided with lower, outwardly protruding parts (12,16) that will engage beneath the lower edge of the frame (2) and thus transfer the said forces directly to the frame. Hereby the bolts are considerably relieved, and their duration is substantially prolonged .