GB1272315A - Device for processing workpieces by vibratory barrelling - Google Patents

Abstract

1,272,315. Finishing. KOMBINAT ZENT- -RONIK VEB. 1 July, 1969, No. 33124/69. Heading B3D. A device for finishing workpieces comprises a work container 1 which is oscillated by a vibrator and receives a grinding or polishing medium 19 and possibly workpieces to which a progressive circulatory motion is impartial through the transmitted oscillations, and an auxiliary device 7 having attachments 13 for receiving workpieces 12, the attachments being rotated by the grinding or polishing medium or positively through a separate drive. The container may be divided by partitions 3 having slides 4 at their bottoms and its end walls 2 support a shaft or stub shafts 6 on which the auxiliary device is mounted. The device consists of three pairs of wheels 10a ... 10f driven by chains 8a ... 8f from a shaft 11 which may be arranged to drive the pairs of chains at different adjustable speeds. The chains carry the work receiving attachments 13 which may be in the form of eyes, springs, angle members or bars 13a, screen drums 13b or magnets 13c. Flight grids 14 serve to separate small workpieces from the grinding media 19. The screen drums receive small or miniature workpieces and are rotatably mounted on the chains. Spraying and drying devices 15, 16 may be provided. In another embodiment, the auxiliary device consists of a frame rotatable on the axles 6 and having radial and transverse rods for receiving the workpiece attachments, the frame being rotated by the grinding or polishing medium or by a separate drive. The container 1 may be surrounded by a sound-absorbing jacket. For debarring plastic workpieces, the workpiecea are cooled so as to be brittle and placed in the screen drums 13b which are double walled so as to be insulating. The inside of the drums may be lined so as to have a surface like a file cleaner, a reaming tool or sandpaper. In a further embodiment, the auxiliary device 7, Fig. 8, runs over tension members 31 in the container 1 and is guided by rollers 30, the workpieces being carried by the receiving attachments 13 which are indexed by stops 40. Prior to the container, the device 7 runs through a shaker conveyer 32 having a guide 38 for grinding medium 19 and small workpieces. A similar shaker conveyer is provided at the exit of the conveyer and has a discharge 52 for the workpieces which pass to a conveyer 37. The medium in shaker conveyer 33 passes through a screen 53, guide 34, conveyer 35 and device 36 to the shaker conveyer 32. A processing container 27 may also be mounted on stub axles in the container 1 and can be raised to empty its contents into the shaker conveyer 33. The container 27 may be replaced by a horizontal cylindrical tube having a spiral insert for conveying workpieces along its length. Alternatively, the cylinder may have a helical strip on its inner surface and the workpieces are placed in a cylindrical container having a helical groove engaging the strip.