Abstract: An apparatus for press casting includes a casting mold formed of a fixed mold and a first moving mold operable to move relative to the fixed mold. The apparatus further includes a second moving mold operable to move relative to the first moving mold. A mold cavity, which forms a cast product, is configured by the fixed mold and the second moving mold. When the first moving mold is moved to a first predetermined position, a molten metal passage and a gas exhaust port, which communicate with the mold cavity, are formed at positions outside the mold cavity. A communication between the mold cavity and the molten metal passage, and the gas exhaust port is cut off by the second moving mold when the second moving mold is moved to a second predetermined position while the first moving mold is maintained at the first predetermined position thereof.

Abstract: An apparatus for uphill low pressure casting of molten metal in sand molds conveyed in synchronized manner with a casting station located at the conveyor, a gas pressure holding furnace containing the molten metal and located at the casting station with a rising casting tube connectable to the sand molds has a device for refilling the holding furnace with molten metal. To permit a rapid casting cycle and high casting capacities, the refilling device has at least one pressure-tight melt container and a filling tube located in the holding furnace with a seal positioned outside the same. The melt container is couplable in pressure-tight manner by means of its outlet to the holding furnace filling tube. The holding furnace is connected to the melt container by means of a pneumatic pressure compensating line.

Abstract: An apparatus for uphill low pressure casting of metals in split sand moulds and having a sprue in one of the two moulds, to which can be connected the casting tube of a melt container and which is connected to the lowest area of the mould cavity, and having a sealing plug integrated into the mould and which after the filling of the mould cavity can be brought into the closed position by means of an external drive engaging in the mould, including a seal which does impairing casting quality and moulding sand preparation. Between the sprue and the mould cavity is provided a casting channel connecting the sprue and the mould cavity. The sealing plug is constructed as a sand mould body and in a shaped-in guide of the mould is displaceable between an open position and a closed position, and seals a casting channel and a metallostatic pressure of the molten metal in the mould acts against the guide on the sealing plug.

Abstract: Squeeze casting of high integrity, near net shape castings is performed in a mould cavity defined by cooperating die parts which are movable with respect to each other and have a separation distance which is selected to define a predetermined cavity volume for the cast article. A conduit has a first end connected to an entrance in the lower die part of the mould cavity and a second end connected to a receptacle which contains molten metal. Molten metal is transferred upwardly from the receptacle through the conduit to fill or substantially fill the mould cavity. The entrance to the mould cavity is sealed, and pressure is applied on the die parts to further reduce the cavity volume during solidification of the metal in the mould cavity.

Abstract: A method of precisely controlling the stroke of movement of at least one squeeze pin in a die casting machine, which pressurizes locally the molten metal charged into a cavity of a metal mold. The method comprises detecting a flow rate of the pressure oil at the back pressure side of a squeeze pin cylinder which drives the squeeze pin of the die casting machine, calculating the stroke of the squeeze pin on the basis of the detected flow rate, and controlling the stroke of the squeeze pin toward a target value with the detected flow rate as a parameter.

Abstract: The machine includes an upper secondary pressure cylinder to give an added pressure onto a backing plate to which an upper die half is attached, and a lower secondary pressure cylinder connected to a main pressure cylinder, which moves a plunger rod to squeeze molten metal into the casting cavity, in a lower section to give an added pressure onto the lower die half through the plunger rod of the main pressure cylinder.

Abstract: A die-casting machine is described which includes at least one cylinder/piston assembly. Each assembly has main, ejector and core pistons and cylinders. The main cylinder is stationary and holds a piston which reciprocates to bring the molds together for metal injection or apart for releasing a die casting. A portion of the interior of the main piston constitutes an ejector cylinder having an ejector piston and a portion of the interior of the ejector piston constitutes a core cylinder having a core piston. The present invention is more compact and less complex than conventional die-casting machines.

Abstract: Controlled-pressure casting of molten metals using a die with an extractable punch and a fixed die, includes positioning and stopping the punch within the die so as to define a casting cavity with a volume greater that that of the part to be obtained. A metered amount of liquid metal is then poured into the casting cavity through a duct which leads into the cavity, and the punch is moved to close inside the die so as to create a pressure suitable for distributing the metal throughout the cavity. A high-pressure compression is then exerted on the metal contained in the cavity and, maintained until the molten metal solidifies, the punch is partially removed from the die, with separation of the punch from the formed part, before finally removing the punch from the die and extracting the part from the die.

Abstract: A method and apparatus for controlling a casting process for obtaining a cast product from a cast substance injected into a die cavity of a pair of casting dies by a fluid-operated injecting plunger and pressurized by a fluid operated squeezing plunger after the completion of an injecting process. Actual movement of the squeezing plunger is controlled to copy a desired curve with respect to a desired movement of the squeezing plunger versus an elapse of time from the start of the actual movement of the squeezing plunger.

Abstract: A pressing mechanism for a casting apparatus comprising: a mold including a cavity for solidifying molten metal therein and a passage for introducing the molten metal into the cavity; a unit for supplying molten metal into the passage, the unit having a sleeve to store molten metal and capable of communicating with the passage and a plunger tip in the sleeve, the plunger tip being capable of protruding from the sleeve so that the molten metal is fed into the mold after the sleeve is communicated with the passage, the tip being capable of protruding substantially completely into the passage so that a front end of the tip approaches closely to a part of an internal surface of the passage; a feeding rod disposed in the mold for freely protruding into the passage; a unit for reciprocating the feeding rod; first and second grooves, the first groove being provided on the part of the inner surface of the passage, the second groove being provided on the front end so that the first and second grooves form a hole into

Abstract: The squeeze-out casting machine comprises a base-plate for reciprocation therealong, half-molds and sealing jaws with pour-in ports adapted to overlap closingly as the half-molds are being brought together. The baseplate has rigidly secured theroen a centering pin supporting a frame with a core unit. The core unit defines jointly with the base plate, the sealing jaws and the portions of the half-molds adjoining the baseplate and a metal-receiving chamber. There is also an arrangement for supplying an inert gas communicating with the metal-receiving chamber.

Abstract: The present invention provides a mold clamp apparatus having a novel construction wherein, though the advance of the movable platen is blocked, it is possible to perform a powerful mold clamping operation as in case of a direct compression operation, and it is also possible to make a support of the movable platen accurate by connecting the tie bar to the fixed platen, and further it is also possible to perform a high-speed mold-closing operation and a powerful mold-clamping operation continuously.

Abstract: A system for the die stamping of a fluid comprises a male die member which s forced into a die cavity to compress and spread the fluid material therein. A piston in this die member is advanced after the die member is arrested by a shoulder of the female die member to compress gas ahead of this piston and increase the pressure at selected locations along the face of the male member at which cavities are provided to communicate this gas pressure to the fluid.

Abstract: An improved method of and apparatus for pressure casting metal are disclosed. The method is generally known in the art as "squeeze casting". The present method provides for casting articles under forging pressures in a die to predetermined dimensions regardless of varying amounts of excess of poured molten metal, by the inclusion of a retractable charge-quantity compensator positioned adjacent the casting cavity to form on the cast article an extension which may vary in volume from article to article. The extension is later removed. The charge-quantity compensator may be in the form of a piston in a cylinder with hydraulic fluid behind the piston connected to a hydraulic source. The piston, which may be normally biased toward the die cavity but yieldable away therefrom is fixed in position when the punch die has advanced to a predetermined position at which the quantity of casting material in the die cavity is appropriate for the article being formed. Full casting pressure is then applied.

Abstract: The invention concerns an improved injection device for molding machines with a cooling chamber for casting of non-ferrous metals and alloys. It is characterized by a two-part piston, one part of which slides freely and coaxially inside the other, forming a chamber in which a gas, neutral with respect to the metal to be cast, is compressed by the forward movement of the piston by virtue of a stop-pin, then liberated and expanded at the end of injection in a container of liquid metal where it causes a balancing force effect and improves the filling of the mold.This device makes it possible to eliminate the "ramroddings" which occur in single-piston machines at the end of injection and to obtain cast products which are free of defects.