GB174414A - Improved wire-cutting brick-making machine - Google Patents

Abstract

174,414. Frey, E. Oct. 19, 1920. Stream - cutting machines; cutting-apparatus; delivery.-In a wire cutting-machine for extruded plastic material the speed of operation of the parts is controlled from the extruded bar itself and the severed blocks are automatically shifted from the cutting position to a removing position. The extruded bar 116 traverses rollers 9 which drive by means of gears 10, 13, a transverse shaft 12 geared at 14 and 19 to a sleeve 18 loosely mounted on the main driving - shaft 15. Loosely mounted on this shaft is a drum 16, 17 independently driven by some external driving-means, and this drum encloses a friction coupling-ring 22, 23, 24 attached by an arm 31 to the shaft 15. This coupling-ring is expanded by a lever 28 having teeth 29 at one end gearing with teeth 20 on the sleeve 18; movement of this lever being caused by the movement of the extruded material, so that the shaft 15 is driven at a speed corresponding to the speed of extrusion, the slip between the coupling-ring and the drum being greater should the speed of extrusion lessen. The wire cutter 65 is reciprocated in guides 60 by levers 66, 38, 35, from a crank 34 fixed to the shaft 15, the guides being mounted on a carriage 53 which is adapted to be moved forward by the extruded material during cutting until the cutter enters a groove 67 in the carriage. The cut-off portion then tests on platforms 63 on the carriage which are on the same level as fixed platform 108 of the machine. During this action the carriage-actuating gear 50, 47, 44, Fig. 8, actuated by a cam-plate 39 on the driving-shaft, has been inoperative, but at the end of the cutting the roller 44 is actuated by the end of the flat 43 on the cam to give a slight backward motion, and then by the groove 42 to give a quick forward motion carrying the cut block clear of the bar 116. A pause then occurs during which the wire cutter is raised through the gap thus caused and then retracted to the 'initial cutting position over the bar 116. A bifurcated scraper 75 is then reciprocated over the cutter by lever gear 71, 72 operated by a cam 68 on the main driving-shaft. The cutting operation is then repeated, and after two or three blocks are cut ratio gear 76, 77 causes the actuation of a block lifter and transferrer through a slotted lever 78 and levers 83, 84. The lifter consists of platforms 95 interposed between the carrier platforms 63 and carried by a vertically sliding rod 93, Fig. 4, which is normally in lowered position so that the platforms are below the carrier platforms. Just prior to the longitudinal movement of the lifter by the lever 84, a pulley 104 carried by a pivoted arm 102 is actuated by lever gear 113, 110, 111 to rock through a cord connection a double-armed lever 101 on the frame of the lifter and by eccentric pin 98 to raise the lifter, so raising the blocks, which are then transferred by the longitudinal movement of the lifter and deposited on the fixed platforms 108, whence they are removed by hand. The longitudinal movement of the lifter without causing any actuation of the lifting mechanism is obtained by the cord 106, which passes over the pulleys 104, 105 carried by the two pivoted arms 102, 103 respectively.