Patent GB-1007964-A (GB)
Title: Type casting machine
IPC: B41B7/04
Filed: 1961-10-30
Abstract: 1,007,964. Type-making machines. LANSTON INDUSTRIES Inc. Oct. 30, 1961 [Nov. 2, 1960] No. 38814/61. Heading B6W. In a type-casting machine of the kind described in Specification 787,242, modified means are provided for positioning the matrix case and for controlling the width of the mould cavity. The machine has front and rear pin blocks of similar construction for controlling movements of the matrix case in directions perpendicular to each other. The front pin block 24 is shown in Figs. 2, 3, and has eight vertically movable gauge pins 34 normally held by springs in retracted positions within the block and one gauge pin 34 which is fixed in a position in which it projects from the block. Mounted on the block 24 is a pair of pin jaws 30, 32 which limit the movement of the pin jaw tongs (not shown) which in turn are connected to the matrix case (not shown), whereby the movement of the case in one direction is limited. The jaws are slidably mounted on a horizontal rod 36 and the pins 34 are disposed between the jaws when the latter are in their most widely spaced positions. As shown in Fig. 3, the pins are so arranged on the block as to define nine transversely spaced points. Fluid under pressure is delivered to the underside of selected movable pins 34 through holes 52, selection of the pins being controlled by a perforated tape, and the pins are thereby caused to project from the block. After a pin has been elevated, the jaw 30 is moved towards it until the notched leading edge 38 thereof engages the pin; the other jaw 32 is then moved towards the jaw 30 until it strikes it and this determines the location of the matrix case in one direction. If none of the movable pins is projected, the edge 38 strikes the fixed pin 34. A plate 54 is slidably mounted on the upper surface of the block 24 between tracks 56 and is positioned between the pins 34 and the edge 38 of the jaw 30; the leading edge of the plate is notched and the edge adjacent to the jaw 30 has protuberances which mate with the notches in the edge 38. A member 66 extends rearwards from the plate 54, beneath the jaw 30, and the rear end 68 thereof engages the rear edge of the jaw. The plate 54 normally lies in a plane below the bottom of the jaw 30 so that the jaw can move over it into engagement with the pins 34, but the plate can be moved upwards by means of a fluid-actuated pin 70 until the rear edge thereof is aligned with the edge 38. When the plate is in the latter position it is carried with the jaw 30 when the latter moves to the left and the jaw is arrested when the leading edge of the plate abuts against one of the pins 34. In this way the nine pins 34 determine eighteen different step positions for the jaw 30. The plate 54 is moved to the right with the jaw 30 by reason of the abutment between the rear edge of the jaw and the end 68 of the member 66. The positioning of the mould blade which governs the width of the mould cavity is controlled by a pin block 28, Figs. 5, 6, which includes a piston 78 slidable in a chamber 80. The piston has an upstanding lug 82 thereon and is moved to the right, as shown, by a shoe 130 having a depending boss 138 which can engage the lug 82. The movement of the shoe determines the position of the mould blade. The leading edge of the piston is notched at 104 for engagement with any one of eight movable pins 84 or with a fixed pin 86 which pins are operated in a similar manner to the pins 34. A shift tongue 106 having the form of a bellcrank lever is pivoted on a rod 108 mounted on the block 28 and is engaged by a spring 116 which both urges the tongue to the left as shown and biases the tongue torsionally to a position in which a projection 112 carried thereby is not disposed between the boss 138 and the lug 82. The tongue can be pivoted against the latter bias by means of a fluid-actuated pin 118, whereby the projection 112 is interposed between the boss 138 and the lug 82. The boss 138 then engages the projection 112 and moves the tongue to the right along the rod 108; the projection 112 engages the lug 82 and carries the piston 78 along with it until it is arrested by a pin 84 or 86. By this means movement of the shoe 130 to the right can be arrested in eighteen different positions. The piston 78 is returned to its lefthand position by fluid under pressure emitted into the chamber 80 through the fixed pin 86 which is hollow and has lateral holes 98 in its walls. A latch 140 is provided for preventing actuation of the tongue 106 before the piston 78 has returned to its left-hand position. Specifications 982,366, 982,367, 982,368, 982,369, 982,370 and 982,371 also are referred to.