Patent GB-190504027-A (GB)
Title: Improvements in Machines for Molding Various Materials to Form Bricks, Blocks, Tiles, Briquettes, or the like.
Inventor: GODWIN WILLIAM SELBY
Filed: 1905-02-27
Granted: 1905-12-30
Abstract: 4027. Godwin, W. S. Feb. 27. Moulding bricks, blocks, tiles, briquettes, &c.- Relates to rotarytable machines for making blocks, tiles, &c. of asphalt or other material and briquettes. The machine a s shown has two sets of feeding, pressing, and delivery mechanisms arranged on a hexagonal table 2 carried on a base 1. The material is fed in through hoppers 15, Fig. 1, compressed by means of pressure fluid introduced intermittently through pipes 170, 171 to pistons 142, and discharged at the next movement on to a conveyer 20, Fig. 4, passing through a receptacle containing liquid or other cooling-agent. The table 2 is annular and has annular ribs 4, 5, Fig. 3, running in shaped ways 6, 7 on the base 1. Recesses 9, Fig. 5, are formed on the inner wall of the table, with which is adapted to engage the driving- pawl 50 carried on an arm 70 on the central shaft. The arm 70 is rocked from the driving- shaft 61 by means of bevelwheels 63, of which the wheel 63 carries on its flat surface a projection 65 engaging the eccentric bushing 67 of an arm 66 connected to the arm 70. The pawl 50 is spring- pressed and has a projecting part 74 engaging the recesses 9, which have hardened bushings 51, 52, and an extended part 76, which, on contacting with an adjustable arm 77, acts to disengage the pawl from the recesses. The part 74 and the bushing 52 have bevelled edges to prevent the pawl from entering the recesses as it moves back, and pins 82, 83, Fig. 4, are operated to enter the recess with which the pawl should engage to prevent engagement until it is required. Other pins enter the lined holes 53, Fig. 5, to hold the table immovable while the feeding or other operations are taking place. The hopper 15, Fig. 2, is jacketed, and has a shaft 105 carrying stirring-arms 106 running through it. The shaft has a plate 110 at its top carrying pawls which engage the internally-toothed wheel 108, so that, on this wheel being rotated by means of links 116, 117 from the central shaft, the shaft 105 is also rotated. In this way, the material is stirred and fed into the mould portions 10, which have mould openings 11 with hardened bushings 12. The casing 120 below the hopper 15 has on one side a knifeedge 125, Fig. 17, which severs the material in the moulds from the main body as the table rotates. The material rests on the broken annular table 130 till it reaches the pressing-device, and on the way its upper and lower surfaces are lubricated by rollers 131, 135 as shown in Fig. 17. The pressing is effected by the means shown in Fig. 3. Pressure liquid is intermittently introduced by pipes 170, 171 to the pistons 142, which have two rods 143 so to prevent strain. The valves in the pipes are operated by cams on the shaft 85 acting on rods which operate the rods 283, 284. The pistons, being depressed, carry down with them the upper plungers 16, and by depressing the inner ends of the rocking blocks 165, raise the standards 152 and so elevate the lower plungers 17, which are carried on frames 160 attached to the standards. Fluid is constantly introduced through the pipe 202 to an auxiliary cylinder 193, but can only operate when the pressure on the larger pistons 142 is cut off, when it forces down the piston 192 and lowers the inner ends of the rods 205, thus withdrawing the pressure plungers. The ends 215 of the levers 89 of the ejector mechanism take into openings 211 of a block 201 carried by the piston 192, so that the ejector plungers 18 are being operated while the pressing-plungers are rising. The plungers 18 are lubricated by lubricants passing from the reservoirs 197 to packing 196 in external grooves 195, and are carried by sliders 186. The outer ends of the levers 89 are racked and operate ratchet-wheels 240, which are intermittently connected by spring- pressed pawls to the shafts 239. By means of the connecting adjustable arms 253 and the pivoted arms 236, the movement of the levers 89 lowers the tables 22, on to which the moulded forms are pushed out. Blocks 23 on these tables move along cam-races 234 as the tables descend, and deliver the forms on to a fast conveyer 20 passing round adjustable sprocket-wheels. From this conveyer, the forms pass over a bridge part on to a slow conveyer on which they are taken away. The gearing for driving the conveyer is shown in Fig. 5. The mould portions 10, Fig. 1, are held from displacement by screws 40 engaging recesses in the portions 10 and the table.