Patent GB-191328148-A (GB)
Title: Improvements in Type Casting Machines.
Inventor: SCHMITT OTTO GEORGE
IPC: B41B5/06
Filed: 1913-12-06
Granted: 1915-07-15
Abstract: 28,148. Schmitt, O. G., and Murray, C. R. Dec. 6. Type-casting machines; moulds; metal pots and pumps.-In a type-casting machine, a number of types are cast from a single matrix in each cycle of the machine. The matrix is moved into register with two mould slots alternately. Two forms of the machine are described. The mould slots 27, 28, Fig. 4, are formed in a mould block 26 carried by the frame beneath a ram 11, Figs. 1, 3, and 5. The ram is intermittently operated by a cam 10, which is operated from the main shaft 3, Fig. 1, by gearing 7, 9. This intermediate gearing enables the movement of the ram to be at least twice as fast as direct gearing with the main shaft: hence the ram is at rest for a greater proportion of the time occupied in a complete cycle of the machine, and the machine can therefore be driven at a higher speed. The ram is provided with a pin 12 for engagement with the camgroove. The pin 12 is operated by a lever 13 pivoted at 14 and actuated by a sliding rod 18, which is controlled by a cam 6. At the other end of the lever 13 is a second pin 23 having a tapered end, which engages registering holes in a block 24 fixed to the ram 11 and holds the ram in its positions of rest. The types are ejected from the mould slots by fingers 29 carried by plungers 30, which are lifted against spring pressure by levers 31 actuated by grooves in the opposite faces of a cam 5. The size of the mould can be varied by altering the throw of the fingers 29. This is accomplished by means of a threaded bolt 45, Fig. 4, which carries a nut 48 having stops engaging offset lugs on the plungers 30. An indicating-device is provided, and the size of the mould cavity is read through an orifice 54. The types are received in two grooves in the ram, from which, after the ram has moved to its alternative position, they are ejected by fingers or plates 33, 34 into type-ways 41. The fingers 33, 34 are provided with pins 35, 36 which are engaged by adjustable screws 37, 38 on a lever 39, which is rocked by the ejection of the types from the mould slots by the fingers 29. The matrix 42, Figs. 3 and 5, is carried by a block 43 mounted between guideblocks 57 carried by plates 56 fixed to the ram. The block 43 carries two horizontal plates 59, 60 between which the matrix is placed. These plates are mounted on a spring-controlled sleeve 61 and bolt 64 respectively, and can be adjusted relatively to the block 43. The block is further provided with fingers 66 which engage mating grooves in the face of the ram, and against which the matrix is pressed by a finger 67 actuated by a spring-controlled bolt 69 having a hand-wheel 72. The longitudinal position of the matrix is determined by an adjustable block supported on an arm on the block 43. The block 43 is moved to and from the mould slots by means of a lever 78 carried by a hub 79 splined on a shaft 80, which is rocked by means of a lever 82 engaging a slot in the plunger 18. The pump is driven from a cam 4 and is provided with two nozzles 99 leading from a valve chamber 98. The valves 101 are carried by blocks 103 provided with spring-controlled stems 104, which are operated to open the valves by means of bolts 107. The bolts 107 are carried by the ram and are actuated when the mould block 43 is moved towards the mould. The types are cast with wedge-shaped spurs which are broken off when the types are transferred to the type-ways; the faces are trimmed by knives such as 110, 111. The frame 2 carrying the ram 11 is set at an angle, so that the pump nozzles and mould slots are inclined to prevent freezing at the nozzles. In the modification shown in Fig. 13, the matrix box 128 does not reciprocate with the ram, and a pump with a single nozzle is used. The types are ejected from the mould slots into the type-ways by means of plungers 130, 131, the upper ends of which engage alternately arms 148, 149 which are reciprocated from a cam on the main shaft.