Abstract: A hot chamber die casting machine for a processing of molten metals. The die casting machine includes a frame having a slanted surface for accommodating a closing unit. The closing unit is operable from a crosshead by way of a toggle lever mechanism and is mounted on guide bars supported at the frame. The closing unit includes two mold mounting tables which are adapted to be pressed together. A scissors-type linkage mechanism is disposed below the closing unit and includes transversely joined levers with a drive arrangement being provided for spreading the linkage mechanism so as to enable an adjustment of the closing unit.

Abstract: Apparatus for diecasting the barrel for a pin tumbler lock without the need for subsequent machining. The die comprises a generally barrel shaped cavity and three retractable cores. The first core extends radially inwardly into the cavity from one end to form the entry hole for the key and the second and third cores extend radially into the cavity until they meet at a line about which is formed a fin adapted to mate with a channel in the key. The third core also defines guide channels for the pin tumblers.

Abstract: The invention relates, in a chill-molding machine, to an adjustable device for coupling the driving yoke of the side parts of a mold to a jack for operating this yoke. This device is constituted by a part fast to the rod of the jack mounted to slide in the transverse part of the yoke and immobilizable in this part by a clamp borne by the yoke. The invention has application in the foundry field.

Abstract: A die casting machine comprises a pair of relating movable die plates, a pair of mold halves attached to the opposing surfaces of the die plates, and a spray device for spraying mold releasing agent to inner surfaces of the mold halves. The spray device comprises a cylinder-piston assembly secured to a support member mounted on one of the die plates, a link mechanism being operated by the movement of the cylinder-piston assembly, and a spray head supported at the front end of the link mechanism and provided with a plurality of spray guns. The spray guns are positioned in a space between the mold halves when the link mechanism is moved to a predetermined inclined position by the operation of the cylinder-piston assembly.

Abstract: An apparatus and method for removing tie bars from a die casting machine. The apparatus and method involves utilizing gearing attached to the tie bar nut whereby the nut is held captive, but is capable of being rotated by an auxiliary drive unit. Further, by utilizing the existing die casting machine functions, it is possible to remove the tie bar from the machine so that the die can be removed and a new die inserted into the die casting machine. By reversing the process the tie bar can now be reinserted into its operating position in the machine and the locking nut rotated to its proper position and locked up.

Abstract: Apparatus and method for producing a die cast article, such as a gear wheel having helical teeth, in which the die cavity is defined by fixed elements and a rotatable element. On completion of the casting the cast article can be ejected from the casting cavity on relative rotation between the fixed elements and rotatable element so that the cast helical teeth of the article can be removed in an undamaged condition.

Abstract: An automatic part loading unit for loading various diameter and stack height sizes of rotor assemblies into the compensator sleeves of multiple cavity rotor dies for the subsequent casting of the conductor bars and end rings of squirrel cage electrical motor rotors. The loading unit comprises a magazine section having a plurality of inclined guide tracks on which the rotor preforms are stacked, and an escapement mechanism which permits one rotor preform at a time to roll from each of the guide tracks in the magazine section onto respective inclined guide tracks leading to the breech openings of the die cavities. The guide tracks are laterally adjustable so as to accommodate rotor preforms of various stack height. As the rotor preforms roll down the inclined guide track toward the die cavities, they are decelerated by means of pivotally mounted, counterweighted arms which are contacted by and then swung out of the way by the rotors.

Abstract: A pull-back ram cylinder apparatus in combination with a vertical mold clamping machine to be incorporated in a vertical molding or casting machine. The pull-back apparatus comprises a hydraulic cylinder for actuating a hollow ram. A ram extension consisting of the ram and a ram rod extending into the ram in a thread engagement is slidably fitted in the cylinder. The ram rod extends downwardly from the cylinder and is connected to a movable platen of the clamping machine carrying a movable mold. The cylinder has a lower throttle portion in which radial openings for discharging an operation oil are formed in an axially spaced arrangement. The inner diameter of the throttle portion is slightly larger than the outer diameter of the ram. The throttle portion having the axially spaced openings serves, in cooperation with the head end portion of the ram, as buffering means by which the movable mold is allowed to come into contact gently with a stationary mold.

Abstract: Apparatus for detachably mounting molds on die plates of, for example, a die casting machine, which comprises a casing slidable on the die plate, a wedge member located within the casing and in contact with the inner surface thereof and a clamp lever located in the casing to be rotatable about a shaft attached to the casing and in contact with the inclined surface of the wedge member at one end. A clamping member to clamp a mold half in the die plate is provided for the other end of the clamp lever. The wedge member and the casing are moved by a hydraulic drive engaged with the wedge and there is provided a member for resiliently urging the one end of the clamp lever against the inclined surface of the wedge member.

Abstract: A system for individually adjusting tie bars of a die casting machine during operation includes a threaded sleeve securing one end of each of the threadless tie bars to a backing plate with an adjustment nut positioned between the backing plate and threaded sleeve for adjusting the machine lockup tension on the tie bar. The adjustment nut associated with each of the four tie bars has gear teeth and can be adjusted by means of disengagable idler gears commonly engaging a centrally located bull gear for selectively adjusting one or more of the tie bars. In one embodiment of the invention, strain gauges are placed on the threaded sleeves for detecting the lockup force applied to the tie bars through the sleeves and an electrical control circuit is employed for automatically controlling the tie bar adjustment mechanism to maintain tie bar tension within prescribed limits during production operation of the die casting machine.

Abstract: In cylindrical insert loading apparatus of the type wherein an insert transfer unit is reciprocated by a transfer device between stationary and movable metal molds of a die cast machine and an insert supply unit, the insert transfer unit comprises a movable frame and insert loading cylinders are mounted on the movable frame with their operating axes cross with each other. After the inserts have been supplied from an insert supply furnace to the operating ends of insert loading cylinders, the insert transfer unit is moved between the stationary and movable molds while maintaining horizontal attitude. The movable frame is moved in the axial direction of the die cast machine until the insert transfer unit collides against the movable metal mold to align the inserts with the insert receiving sections in the movable metal mold. Thereafter, insert loading cylinders are operated to load the inserts and the insert transfer unit is returned to the insert supply furnace.

Abstract: A die casting system comprises a machine of the balanced, dual movement type wherein the part is cast and trimmed without any lateral movement. Both halves of the molds or dies are moved equal distances to and from the part plane. The machine incorporates a system of metal injection on the mold parting line with a runner-drain provision; provision for supporting the part at a plurality of points after the die opening; hydraulic fluid volumetric flow reduction; various nozzle configuration options and a heat transfer system for the dies. In addition, a part trimming machine is disclosed together with a cable transfer for moving the part from the casting machine to the trimming machine.

Abstract: The specification discloses a die casting machine of the type adapted to form an article with an internal threaded portion. The threaded portion is formed by means of a threading device which is retractable. The threading device is rotatably and retractably operated by a pinion which in turn is rotated by a cog wheel. The die casting machine may contain a plurality of molding cavities, each being provided with the threading device. The cog wheels may be driven by a common rack which is hydraulically operated. Since the threading device of this invention is retractable, it is feasible to repeat a casting cycle without replacing the mold. Thus, it is much faster to fabricate such articles with the present machine than conventional die casting threading apparatus. Because no part is replaced or removed from the die casting machine in the present invention, it is possible to minimize possible dimensional variation among the articles fabricated.

Abstract: A die casting unit employing plural die members and core members which are used in closed position for die casting shaped articles of unusual configuration and particularly articles which are comprised of two or more subcomponents arranged or joined in interconnected assembly, an example of such shaped article being the slider body and pull chain used on slide fasteners. Movement of at least the die members during the molding cycle is effected by rotation of a ring member carrying structure which cooperates with structure on the die members to slide the die members between their open and closed positions.

Abstract: A casting device with a mold section attached to a fixed platen, a mold section attached to a movable platen, a drive unit to move the movable platen in relation to the fixed platen, coupling rods connecting the movable platen to the fixed platen when the two mold sections have fully or closely approached each other and hydraulic pressure mechanisms capable of closing completely the mold sections, and keeping them closed, against the high internal injection pressure. Each platen, on the side removed from the mold sections, is provided with a rigid frame and with a number of hydraulic rams, together forming the above-mentioned hydraulic pressure mechanism, distributed between the platen and its rigid frame and the coupling rods are disconnectably connected with the circumference of both rigid frames so as to connect these frames with compressive stress or tensile strength by means of the double-acting rams, when the mold sections have fully or closely approached each other.

Abstract: A plate strap is die-cast integrally with an upstanding conducting member, which may be either a terminal post or a riser to form part of an intercell connector, by means of a mold having a cavity affording an elongated plate strap position which is closed at the top and has slots in the floor through which the plate lugs project, and a chimney position upstanding from the plate strap position to form the upstanding conducting member. The part of the floor between the plate lugs is formed by cylindrical dowels each having a diameter substantially equal to the spacing between adjacent lugs. The dowels are retracted to permit removal of the mold from the plate strap or straps. A single mold may form a row of plate straps associated with a number of intercell connectors and a pair of terminal posts.

Abstract: The invention relates to an automatic low-pressure diecasting machine, notably for mass-production equipments. The casting takes place through a heat-insulated distribution chamber thermally insulated from the lower portion of the mould structure and delivering the molten metal directly to the mould impression or impressions through a series of substantially vertical feed metal inlet passages formed through the mould bottom. The distribution chamber, of relatively simple design, extends substantially over the entire area of the lower mould impression which requires the presence of such feed metal inlet passages. This machine is intended more particularly for light-alloy castings.

Abstract: In a pressure moulding machine, particularly a die casting machine, detection of locking together of the die parts by the applied pressure is effected by detecting the resulting mechanical stretch in the machine frame; the die parts are opened and closed together by an air motor associated with a hydraulic motor that damps the opening and closing movement of the dies, the die parts being locked together by the hydraulic motor; full closing of the die parts is determined by applying pressurized air to bores therein and to a controlling pressure switch, the pressure switch not being operable if air is leaking from the bores.

Abstract: A die casting machine is described and includes a frame supporting two pairs of spaced, parallel cylinder assemblies with each pair of assemblies carrying a mold half and being opposed to the other pair of assemblies which carry the other mold half. Each cylinder assembly of each pair comprises a stationary piston secured to the frame; a piston shaft secured to and co-axial with the piston, the shaft extending across to a connection with an opposed piston of the other pair; and a cylinder is mounted on the piston and shaft for reciprocal movement thereon in response to fluid injected therein on either side of the piston. Means connect the cylinder to their respective mold halves whereby injection of fluid into the cylinders at the crown ends of the pistons forces the two pairs of cylinders and two mold halves together and fluid injection at the skirt ends of the pistons forces the cylinders and mold halves apart.

Abstract: Installation in which an immersed electromagnetic pump feeds successively at least two low-pressure casting moulds, the feeding of the second mould being effected during the cooling of the first mould, wherein the moulds are arranged on either side of the pump and of the vertical line of the maintaining ladle and at a level higher than the latter. Moreover, the contact and interconnection and locking operations of the pipe for feeding molten metal to the mould are simplified and accelerated. Numerous applications to the casting of aluminum parts, cast metal parts or steel parts.

Abstract: A pressure die-casting block, wherein two block halves are assembled together along a plane defining a parting plane of the blocks and provide an internal cavity for performing a die-casting operation. The block is provided with a device for attenuating pressure forces which arise during the casting operation, the device being disposed in one of the block halves and acting in the parting plane of the block.

Abstract: An automatic casting machine for automatically die casting and die trimming of zinc, aluminum, magnesium, lead or injection molding of parts and delivering the finished parts die trimmed free of flash and separated from the runners, gates and overflows into a finished parts receiver. The machine can be fabricated as a modification of a conventional die casting or injection molding machine, primarily by the addition of a centrally located indexing finger which becomes fastened to the sprew or bung upon casting or molding of the parts.

Abstract: A system for individually adjusting tie bars of a die casting machine during operation includes a threaded sleeve securing one end of each of the threadless tie bars to a backing plate with an adjustment nut positioned between the backing plate and threaded sleeve for adjusting the machine lockup tension on the tie bar. The adjustment nut associated with each of the four tie bars has gear teeth and can be adjusted by means of disengagable idler gears commonly engaging a centrally located bull gear for selectively adjusting one or more of the tie bars. In one embodiment of the invention, strain gauges are placed on the threaded sleeves for detecting the lockup force applied to the tie bars through the sleeves and an electrical control circuit is employed for automatically controlling the tie bar adjustment mechanism to maintain tie bar tension within prescribed limits during production operation of the die casting machine.