Patent GB-190222589-A (GB)
Title: Improvements in Apparatus for Making and Venting Cores.
Inventor: BUTLER JOHN
Filed: 1902-10-17
Granted: 1903-10-17
Abstract: 22,589. Butler, J. Oct. 17. Moulding.-An apparatus for making and venting cores of various lengths and cross-sections has a table a, on which is placed a plate on which the core-boxes are formed by partitions b and ends d. The partitions fit into notches in the ends, the whole being held against a verticallyadjustable fence h by clamps e operated by a handle g. A tray z, carried by arms y on levers x, normally rests above a table n, but can be swung to bring its open front over each core-box in succession, the levers x being carried by a shaft w rocked by worm gearing and a handle 7. The tray is filled with sand to a certain level, and a scoop 68, Figs. 4 and 5, with two long blades 69, 72, is used to draw the required amount of sand from the tray to half-fill one box, the distance between the blades being adjusted so that this amount of sand is enclosed between them. A carriage 13, carrying the vent-wires 8, as described in Specification No. 13,249, A.D. 1901, and guided on rods 14<a>, is drawn forwards by chain gearing 17 and a handle 20 to pass the wires through the fence h, and one end d into the core-boxes. The vent-wires are prevented from sagging by a block 21 sliding on the rods 14<a>. The carriage 13 is connected by a hook 63 to a frame 61 sliding on the rods 14<a>, and connected hy rods 59 to a carriage 46, in which are a number of hoppers, spaced to suit the core-boxes, and each provided with a feeding-device to allow stiffening-irons to be dropped into the boxes at intervals as the ventwires are advanced. The feeding-devices are operated by stops (not shown) engaging a ratchetlever operating the feeding-devices simultaneously through bevel gearing. The vent-wires may be further supported during their passage through long core-boxes, by pairs of pivoted fingers 24 on a carriage 29 hooked to the carriage 46. The fingers are normally in a horizontal position clear of the boxes, but can be turned into a vertical position and locked by a handle 43<a> so that they grip the wires after they have entered the boxes. When the vent-wires have entered the further ends of the boxes, the fingers are released by a trip 45<a>. The boxes are then filled by a second use of the tray z and the scoop 68, and rammed. The hook 63 is disengaged to allow the carriages 29, 46 to be pushed back, and the handle 7 is operated to press the tray z upon the sand in the boxes, and to hold the sand and core-irons in place while the vent-wires are withdrawn. The tray is then drawn back, and the plate j carrying the boxes is raised on rollers k by operating plungers p, so that the plate and boxes may be moved on to the roller table n to allow the cores to be removed. Blocks 78, Fig. 12, may be placed between the partitions b to determine the lengths of the cores. The blocks have pins 74 engaging the partitions, and may be formed hollow to form cores with chamfered or other shaped ends. To facilitate the handling of cores of large diameter formed upon a mandrel, the core-irons are formed upon a wire net-work, Fig. 16, and are embedded in the core material at some suitable stage, for example after the first coat of loam has been applied to the mandrel or support. The wire net-work is rolled into a cylindrical form, Fig. 17, and its ends are secured by hooks &c. 80. The Provisional Specification states that suitable electrical devices may be used for guiding the vent wires through the boxes.