Patent GB-1117682-A (GB)
Title: Improvements in and relating to a method and apparatus for making faced concrete blocks
IPC: B28B19/00
Filed: 1965-07-01
Abstract: 1,117,682. Moulding faced concrete blocks. E. J. TAYLOR-SMITH. 1 July, 1965 [31 Aug., 1964], No. 27867/65. Heading B5A. In a moulding machine for making decorative or structural concrete blocks faced with particulate material, e.g. stones, rocks, marble, slate, lava, mineral ores or coal, a pair of moulds 22 are carried by a frame 12, which is rotatable through two successive 90-degree positions from a loading position (Fig. 5, not shown) to a moulding position (Figs. 6 to 8, not shown) and then to a discharging position (Fig. 9, not shown) and each mould is provided with fixed side plates 25, 25, and face and back plates 71, 48 which are respectively attached to beams 77, 54 which carry vibrators 75, 52 and are displaceable by hydraulic cylinders 77, 54 attached to frame 12, and each mould is also provided with displaceable partitions 35, 37, actuated by hydraulic cylinders 65, 61 attached to frame 12, and with displaceable bottoms 80, 40 actuated by hydraulic cylinders 85, 98 which are carried on a plate 90, together with stop rods 88, 100 therefor, which is connected by rods 103 to a pair of beams 105 to form a clamping frame movable with respect to frame 12 by an hydraulic cylinder 120 attached thereto. Mould cores 42, 43 may be provided, adjacent plates 37, which are secured to a member 45 fixed to the frame 12; a frame 110 is slidably mounted upon beams 105 to carry a palette 113. With the mould 22 in the vertical. Fig. 2, position and mould bottoms 40 and 80 in their lowermost positions, the mould section 29 between facing plate 71 and partition 35 is charged with facing rock and concrete is simultaneously charged into the section between partition plate 35 and back plate 48 with partition plate 37 being raised to define mould sections 31 and 33 just before filling is completed. Palette 113 is placed over the moulds and clamped thereto by the clamping frame and the mould bottoms 40 and 80 are then raised to define the moulding cavity (Fig. 5) before rotating the frame 12 through 90 degrees (Fig. 6) so that mould section 29 is lowermost. Vibrator 75 is operated to level the rack in mould section 29, dividing plate 35 is withdrawn and face plate 71 is then displaced into the mould to subject the racks to high frequency vibration whilst they are simultaneously pressed into the concrete against dividing plate 37. The moulding process is completed if decorative facing blocks only are required but, if structural facing blocks are required, dividing plate 37 is withdrawn and face and back plates 71 and 48 are moved together (Fig. 8) to size the block whilst plate 48 is vibrated to agitate the larger mass of concrete. Frame 12 is rotated 90 degrees (Fig. 9) whereupon plates 71 and 48 are retracted and the clamping frame is displaced with respect to frame 12 carrying pallette 113 and the actuating cylinders 85, 98 of mould bottoms 80, 40 which are thereby displaced to eject the moulded concrete block from between the mould sides 25, 26; after retracting mould bottoms 80, 40 by cylinders 85, 98 the moulded block is removed on pallette 113.