Patent GB-857757-A (GB)
Title: Improvements in apparatus for removing mouldings from a rotary table press
IPC: B30B15/32
Filed: 1957-06-14
Abstract: 857,757. Conveyers for handling mouldings. DORSTENER EISENGIESSEREI UND MASCHINENFABRIK A.G. June 14, 1957 [June 15, 1956], No. 18797/57. Classes 78 (1). Cal care ous -sandstone mouldings are transferred from an intermittentlydriven rotary table 2 of a moulding machine 1 by a rockable carrier adapted simultaneously to grip a number of mouldings on the table during a rest period of the latter, swing them through approximately 90 degrees and simultaneously rotate them into aligned position transversely of the carrier, and deposit them simultaneously on a succeeding conveyer. The carrier consists of a pair of arms 5 freely mounted for swinging by crank gear 15 on fixed shafts 6 and carrying rotatably between their free ends a shaft 18 to which a casing 17 is secured. Four pairs of grippers are mounted on shafts 31 which are arranged vertically in the casing when the device is in the pick-up position over the table 2. Each pair of grippers consists of a pair of gripping plates 33 pivoted at opposite ends 32 of a frame carrying a pneumatic cylinder 34 for causing the plates 33 to grip a moulding, and a return spring 35. The shafts 31 are connected by respective sets of bevel gearing 27, 28, 29 and 30 with a shaft 24 arranged parallel to the shaft 18 and rotatable in the casing 17. A pinion 25 on shaft 24 meshes with a smaller diameter pinion on the shaft 18. Finally, the shaft 18 is connected by sets of bevel gears 19, 20 with shafts 21 rotatable in brackets on the respective arms and thence by sets of bevel gears 22, 23 with the fixed shafts 6. The pairs of grippers are arranged to overlie four mould. ings lying radially on the table 2 when the device 4 is in the pick-up position. After operation of the grippers by supplying air to the cylinders 34 the arms are swung by operation of the crank gear 15 during which the shaft 18 is rotated by the bevel gears 19, 20, 22, 23 to rotate the casing 17 through 90 degrees so that the mouldings are lifted and swung upwardly into the edge-on position for delivery to the belt. Simultaneously with the rotation of the casing 17 the shafts 31 are rotated by their respective bevel gears 27-30 and the pinions connecting shaft 24 to shaft 18 so that the grippers are rotated into aligned position as shown in chain lines, Fig. 1, the ratios of the bevel gears 27-30 being suitably chosen to compensate for the fact that the grippers near the ends of the casing 17 require more turning than those near the centre of the casing 17. In a modification, Fig. 5, a casing 63 secured to a shaft 64 rotatably mounted between the ends of a pair of arms 57 swingable about shafts 59 by the crank gear 15 is maintained upright by parallel links 61, 62 connected between each arm 57 and a similar arm 58 mounted above it for swinging about a shaft 60. The grippers are rotatable as in the previous embodiment to align the mouldings by similar sets of bevel gears connecting the shafts (not shown) carrying the grippers with a shaft 67 rotatable in the casing 63, the shaft 67 being rotated during swinging of the arms 57 by pinions 66 on the shaft 65 engaging pinions 65 fixed to the ends of the respective arms 57.