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:
In connection with casting concrete blocks for e.g. pavements etc., there is used a casting equipment including a bottom part (4) with casting cells (26) corresponding to the shape of the concrete blocks and a top part (2) with thrust plates (12) projecting downwards on rods (8) and substantially corresponding to the shape of the casting cells, and so that the thrust plates (12) by stripping the items by vertical displacement of the bottom part (4) are passed down through the casting cells (26). By the invention is provided a top part (2) which includes means in the form of rods that have the same shape as the thrust plate (12), thus preventing the concrete from falling down upon the thrust plate neither during the compression nor during the stripping operation, or in the form of thickened thrust plates or thicker bolt plates (14) ensuring that the top side of the thrust plates (26) or bolt plates (10) remain at a certain height above the top edge of the cells (26) during the entire compression stage, thus preventing the concrete residue, which is inevitably spilled on the mould table during the filling, cannot jump up upon the top side of the thrust plates (12) during the vibration. Hereby is avoided that these concrete remains accumulate and become a compact mass which during the stripping acts as grinding stone on the sides of the cell walls; this contributes to reduce the wear in the cells and the mould is thereby imparted a longer service life. Furthermore, the device has the advantage of considerabl reducin the cleanin of the casting equipment.
Abstract:
Mounting device for a flexible constructed retainer means for retention of a casting upper part in a concrete casting machine of the type which typically is used for the production of casting items in the form of concrete blocks for pavements and wall constructions. Typically, two or three fixer flutes (10) are applied for each casting upper part, the length of the fixer flutes are adapted the depth of the casting upper part. In the invention, a flexible mountable fixer flute (10) consisting of two identical halves (12) is described. When the height of these fixer flute-halves exceeds a certain height, spacers (14) are mounted by means of bolting. The design of the fixer flute (10) leaves a space where the forks of fork lift trucks can be passed through, thus using the fixer flutes to also lift the casting upper part.
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.