Patent GB-128542-A (GB)
Title: Improvements in Hollow Concrete Pole Making Apparatus.
IPC: B28B21/80
Filed: 1919-04-16
Abstract: 128,542. Massey Concrete Products Corporation, (Assignees of Gruenfeld, J. J.). June 18, 1918, [Convention date]. Centrifugal machines; moulds.-A centrifugal concrete-pole-moulding machine comprises a driving-shell A, Fig. 7, revolubly supported by loweradjustable rollers 22 and upper yieldingly-mounted rollers 24, a casing D adapted to be slid into the shell and a mould E adapted to be removably inserted in the casing. The shell A is formed in sections having connecting-flanges 45, Fig. 9, between each pair of which is interposed a tyre 23 adapted to engage a groove in each pulley 22. One section of the shell comprises a casting formed with a sheave 8, Fig. 2, adapted to receive a cable 19 passing around a sheave 9 on a drive shaft 10. the cable being tensioned by passing around a sheave 13 mounted in a carriage 14 connected to a cord 16 and weight 18. To ensure proper distribution of the concrete in the mould, the shell A is adapted to be inclined, the supporting-rollers 22 being adjustable and also capable of inclination to correspond with the inclination of the shell. Each roller is carried by a shaft 22<1>, Fig. 9, having spherical end portions 37 running in bearings 36 which are adjustable vertically by wedges 32, 33, Fig. 7, supported by slides 29, 25, adjustable transversely and longitudinally with respect to the shell A. The upper rollers 24 are plain and are mounted in slides in the framework B and are pressed downwards by springs 42. The casing D is supported by rollers 53 mounted in housings 52 in the shell A, and is held by screw clamping- members H. The casing is formed in halves secured together by clamps 63 engaging flanges 62, Fig. 18, each half being provided with stiffening rings which comprise rings d having tongues 64 to support the mould shell E, rings d<1>, Fig. 19, having tongues 64 slotted at 65 to embrace longitudinal ribs on the mould to cause rotation thereof, rings d<11>, Fig. 20, provided with lugs 67 to embrace ribs 66 on the mould to prevent longitudinal movement and closing rings d<111>. Fig. 21. The mould is built of sections formed in halves and provided with end rings 66, Fig. 20, and longitudinal and circumferential stiffening-ribs, the two halves of the mould being secured together by hooks 71, Fig. 24, carried by the flange 69 of the upper section and passing through slots 73 in the flange 68 of the lower section and adapted to be turned to engage this flange. In assembling the mould, the upper section is inverted and the hooks 71 turned to engage slots 74 when the other section can be readily placecl in position, accurate fitting being ensured by intermediate dowels. The ends of the mould are closed by plates 75, 76, Fig. 26. secured by plates 80, 81; or by filling- pieces J, K, Figs. 31 and 32. In operation, the mould is assembled and placed on a bridge I, Fig. 27, trunnioned at 83 and furnished with a yoke 86 whereby it may be tilted into a pit c. The mould is secured against a stop 85 by chains 84 and, after tilting, is filled with concrete until about half full, after which it is removed and placed in the lower half of the casing. The other half of the casing is then placed in position and secured, and the casing with the mould is run into the shell. A rod is inserted through an aperture 77, Fig. 26, in the plate 75 and worked through the concrete, after which the shell is rotated to form the article. A reinforcement L. Fig. 5, is positioned within the mould by studs l.