GB398806A - Improvements in multiple roller machines for compressing and gauging the thickness of concrete or other composition slabs, tiles and the like - Google Patents

Abstract

398,806. Moulding concrete slabs by rollers co-operating with moulds. BATES, H. K., 42, Hawarden Avenue, Sefton Park, Liverpool. March 16, 1932, No. 7738. [Class 87 (ii).] In apparatus for moulding concrete and like slabs in an apparatus in which the mould is traversed underneath multiple pressure rollers to consolidate the material, the rollers are mounted at a fixed distance from the track carrying the mould, and the walls of the latter are adapted to be depressed under the roller pressure as the thickness of the slab is reduced. In the illustrated form a wheeled mould frame H is charged with material and covered with the tensioned band L which is unwound from the spring drum l<1> before being run on the track E beneath the series of pressure rollers B which engage the band and compress the material. The rollers are slightly lower at the exit than at the entering end, so as to effect a gradually increasing compression and after compression they rest upon the slightly depressed upper surfaces of the sides of the mould. After passing beyond the pressure rollers, the mould walls are engaged by fixed cam rollers M<1>, Fig. 4, and lowered further against the action of the springs h<3> to expose the moulded block on the loose pallet h<4> for delivery. Suitable arrangements of chains and ropes are used in conjunction with a winding drum or drums at one end of the track to move the mould backwards and forwards under the rollers. Several machines can be arranged side by side and timed so that one mould is always ready for loading while the others are being compressed and discharged. The track wheels of the mould in the illustrated form may be replaced by a series of small rollers similar to the pressure rollers to reduce the over-all height of the machine.