Patent GB-1023615-A (GB)
Title: Improvements relating to vibratory finishers
IPC: B24B31/06
Filed: 1964-02-28
Abstract: 1,023,615. Vibratory finishers. J. F. RAMPE. Feb. 28, 1964 [March 1, 1963], No. 8549/64. Heading B3D. A vibratory finisher comprises a tub 101, Fig. 4, supported so as to be vibrated when charged with articles to be finished and with finishing medium and having a bottom outlet 119 through which liquid can be drained, and a trough 440 for directing liquid from the outlet into a tank 410. As described the finisher has two tubs 101, 102 each of which has an opening for charging of the tub with articles to be finished and an abrading medium, such as stones or other abrasive particles, and an outlet 119. The end walls of the tubs are provided with trunnions 125 which are adapted to be clamped by blocks 126, 127 on the side walls, 108, 109, Fig. 5 (not shown), of a carriage 103- the blocks being released to permit tilting of the tubs for unloading thereof. The side members 108, 109 are joined by transverse members 111 . . . 114, and are provided at their ends with resilient supports 104 . . . 107 having bolts 116 for attachment to plates 25 . . . 28 carried by upright members 11, 12 of a main frame. A shaft 301 is journalled in the main frame and has a first pair of eccentrics received in bearings 304 in the side walls 108, 109 whereby, upon rotation of the shaft, the carriage and tubs are given a circular vibratory motion. The shaft 301 also has a second pair of eccentrics which are 180 degrees out of phase with the first pair and received in bearings 305 in the side members 201, 202, Fig. 10 (not shown), of an H- shaped counterpoise 200. The side members are joined by a transverse member 210 and are provided at their ends with balance weights 216 secured to plates 215 connected by bolts 209 to resilient supports 204 . . . 207 adapted to be secured to the plates 25 . . . 28, Fig. 5 (not shown). On rotation of the shaft 301 by a motor 311 connected to the shaft by a variable speed belt drive 313, the movement of the counterpoise acts to balance that of the carriage and tubs. A pair of shoots 401, 402, Fig. 4, are mounted on pivots 406 beneath the tubs 101, 102 for movement between unloading positions in which they receive articles tipped from the tubs and discharge them outwardly beyond the limits of the main frame of the finisher, and working positions in which they receive liquid from the bottom outlets 119 of the tubs and direct it inwards through openings 408 in their end walls into the trough 440. The trough has a semicircular end 443 connected by converging walls 445 to a spout 449. A ring wall 447 is secured to the undersurface of the end 443 and is a sliding fit on a ring 448 upstanding from the cover 429 of the tank, the rings serving as a pivot for movement of the trough into any one of three positions. The tank is divided by longitudinal and transverse walls 416, 418, Fig. 12 (not shown), into two pairs of settling chambers C1, C2 and C3, C4. In the central position, of the trough, the spout is engaged with an opening 435 leading to a discharge spout 453 and in the other positions the spout is engaged with one or other of openings 433 or 434 leading to respective pairs of settling chambers C1, C2 or C3, C4. Each pair of settling chambers is associated with a further separate chamber S1 or S2 each of which has a pump P1 which is connected by conduits to pipes leading to the tubs. A switch 465 is controlled by the movement of the trough such that when the trough is in its central position and connected to the discharge spout 453, neither pump is operative, but when the trough is positioned to discharge into one or other of the pairs of chambers C1, C2 or C3, C4, the associated pump is operated to return liquid to the tubs; the transverse walls 419, 420 act as weirs to cause settling of solid particles in the chambers which are provided with openings 421 having removable covers for removal of the settled particles. The finishing of the articles, such as castings, may be effected dry by loading the articles and finishing medium in the tubs and starting the motor 311. For wet finishing water or other liquid is poured into the tubs and the bottom outlets 119 opened so that the liquid runs on to the shoots which are tilted to a position in which the liquid flows through the openings 408 into the trough. The trough may be positioned to discharge the liquid through the spout 453 or into one of the pairs of settling chambers in the tank. Each pair of chambers may be supplied with different liquids, such as a deburring liquid and a burnishing liquid, respectively, and the trough is first positioned for use of the deburring liquid and then for use of the burnishing liquid. Clean water may then be flushed through the tubs, the trough being connected to the discharge spout. After finishing of the articles is completed, the shoots are tilted to their alternative positions so that when the tubs are tilted, the articles fall on the shoots and are discharged outside the limits of the frame of the finisher.