Abstract: The invention relates to an apparatus (1; 1a; 1b; 1c; 1d; 1e) for producing a casting (36) formed from an amorphous or partially amorphous metal, which comprises a casting mold (3; 3a; 3b; 3c; 3d; 3e) having at least one filling opening (16; 16a; 16b, 41; 16c; 16d; 16e) for introducing a casting material (15; 15a; 15b; 15c; 15d; 15e) forming the casting (36) and a device for melting the casting material (15; 15a; 15b; 15c; 15d; 15e). The melting device expediently has at least one region (13; 13; 13b; 40, 13c; 13d; 13e) which is provided for melting the casting material (15; 15a; 15b; 15c; 15d; 15e). Advantageously, an apparatus is created that allows a particularly targeted application of melting energy into the casting material.

Abstract: A closing unit for a shaping machine includes mutually moveable mold mounting plates suitable for carrying mold tool portions, a first hydraulic cylinder adapted to apply a closing force to the mold mounting plates, a second hydraulic cylinder, and a pressure storage device connected to the first hydraulic cylinder and adapted to store a pressure prevailing in the first hydraulic cylinder upon pressure relief at a storage device pressure. A hydraulic interconnection of the pressure storage device with the second hydraulic cylinder allows the storage pressure stored in the pressure storage device to be used for locking and/or unlocking the locking device.

Abstract: Provided is a mold clamping device that can simplify the component count or structure by including a mold thickness adjustment mechanism that reduces the load on a power source, is easily maintained, and has high design flexibility. Also provided is a mold clamping device that can set a long distance (daylight) between molds without having to upsize the entire mold clamping device and can simplify the component count or structure. A mold clamping device for split molds includes a first platen, a second platen, a pressure receiving platen, and a mold thickness adjustment mechanism disposed on the pressure receiving platen. At least one of the first platen and the second platen is able to move back and forth so as to approach or depart from the other. The pressure receiving platen is located on a side remote from the first platen, of the second platen.

Abstract: A die casting machine with a die casting mold produces metal die cast parts. The die casting machine has a first machine shield, to which a first mold half of the die casting mold is secured, and a second machine shield, to which a second mold half of the die casting mold is secured. In order to compensate for the deflection of the machine shields, an intermediate plate which has at least two temperature-controlling devices that can be used to generate a temperature difference leading to the curving of the intermediate plate is arranged between the first machine shield and the first mold half and/or between the second machine shield and the second mold half.

Abstract: An injection molding apparatus comprising an injection machine, a manifold, a mold, a clamp plate, an actuator interconnected to a valve pin and an external actuator controller, the actuator controller comprising a controller housing adapted to control upstream flow of drive fluid from an upstream actuator drive chamber such that the rate of travel of the drive piston is selectively adjustable to a first rate of travel or velocity over a first course of travel from a gate closed position to a predetermined position of upstream travel and such that the rate of travel of the drive piston beyond the predetermined intermediate upstream position occurs at a second rate of travel or velocity that is higher than the first rate of travel or velocity.

Abstract: A flow rate control valve configuring a meter-out circuit of an injection cylinder is an overlap type where a first port starts to be opened by a spool passing through an overlapping range. The control device holds a characteristic table linking a command value of a control command to the flow rate control valve and a velocity of a plunger including also the movement of the plunger which occurs due to a gap flow even if the spool is located in the overlapping range. Further, the control device specifies the command value corresponding to the target velocity set by operation of the input device based on the characteristic table, performs open control based on this command value, then performs the feedback control for realizing the target velocity.

Abstract: An apparatus and method for melting and forming metal in a vacuum environment. Metal is melted within a metal-forming apparatus and the molten metal is filled into a mold cavity. A high-level vacuum environment is created in the apparatus by drawing air from the apparatus which is sealed from atmospheric air. This makes it possible to reduce contact with air, which can improve the quality of the metal product.

Abstract: A method of forming a threaded bore in a compression molded part comprises: positioning at least one rotatable threaded shaft in a mold cavity during compression molding of a part; rotatably driving the at least one threaded shaft for unthreading the at least one threaded shaft from the part; and pushing the at least one threaded shaft away from the mold cavity once the at least one threaded shaft is unthreaded from the part.

Abstract: A thread forming device for compression molding comprises a base positioned adjacent a compression molding device, a plurality of posts extending from the base, a carrier moveable along the posts and supporting at least one rotatable threaded shaft, each shaft being configured for forming a threaded bore during compression molding of a part, an assembly for rotatably driving the at least one threaded shaft for unthreading the at least one threaded shaft from the part, and one or more biasing members configured to push the carrier away from the base once the at least one threaded shaft is unthreaded from the part.

Abstract: A vertical injection molding machine is provided with a base, a lower mold mounting unit, an injection device, a pressing mold unit, and an upper mold mounting unit. Since the pressing mold unit and the injection device are all disposed on the upper seat of the base, and therefore are located above the lower seat, the lower mold mounting unit, the upper mold and the lower mold. With this design, the height to the ground from the lower seat can be substantially reduced. Namely, the heights of the lower seat, the lower mold mounting unit and the upper and lower molds with respect to the user are reduced to an ergonomic height, which makes operation of the injection molding easier and convenient, while reducing danger and enhancing work safety.

Abstract: Apparatus, system and method for providing supplementary power. A vessel is configured to receive and contain hydraulic fluid, where the vessel includes a piston configured within the vessel to be vertically displaced by the hydraulic fluid and provide pressure from the weight of the piston to a fluid supply line. A solenoid valve is operatively coupled to the fluid supply line; and connected to a flywheel power supply that includes a flywheel and a hydraulic drive adapter, wherein the hydraulic drive adapter is operatively coupled to the solenoid valve via the fluid supply line. A signal is received indicating a power outage, where the solenoid valve is further configured to open in response to the signal and provide the hydraulic fluid pressurized by the piston to the hydraulic drive adapter and causes the flywheel to operate and provide the supplementary power.

Abstract: A die casting machine 100 to fill by injecting molten metal into a die cavity 24 includes a variable displacement pump 16 driven by a servo motor 17 for discharging hydraulic fluid from a hydraulic fluid tank 40, an injection cylinder 11 with a slidable piston 12 assembled therein, hydraulic fluid pipes a and c for supplying hydraulic fluid discharged by the variable displacement pump 16 to the injection cylinder 11, hydraulic fluid pipes d, e1, g and a logic valve 14 connected to hydraulic fluid pipe c for supplying hydraulic fluid ejected from the injection cylinder 11 to hydraulic fluid pipe c with the piston 12 slid by the hydraulic fluid supplied to the injection cylinder 11.

Abstract: A die casting machine that suppresses the occurrence of surge pressure, prevents the occurrence of burrs and spouting of molten metal, and further minimizes variations in the quality of a molded product on site. The die casting machine comprises a mold (101) that cast-molds a product, an injection cylinder (102) for injecting molten metal (15) to the mold, and a hydraulic device (103) for pressing under high pressure the injection cylinder. The hydraulic device comprises a piston ACC (20) that supplies hydraulic oil to press under pressure a piston (13) of the injection cylinder (102) and an injection cylinder inlet valve (31). The piston ACC comprises a high pressure fast pressure-raising piston accumulator (22, 322) and a low-pressure injection piston accumulator (21, 321).

Abstract: In a hybrid injection system of a die casting machine, the occurrence of a large electric power loss can be prevented by avoiding a large current at a pressure-holding step and the size of a motor is reduced. In an injection system comprising an injection cylinder (16) housing an injection piston (15) for injecting molten metal to a mold and an electric booster (8) of hydraulic cylinder type, a head chamber (8H) to the electric booster communicates fluidly with a head chamber (16H) of the injection cylinder, causing a booster piston rod (5) to be housed in the electric booster (8) to move linearly and thus pressing under pressure to move the injection piston to perform injection molding.

Abstract: A die-casting die having a plurality of laterally movable slides is provided with a plurality of hydraulic cylinders located and carried internally within the die and connected with the plurality of slides to move the slides between cavity-open and cavity-closed positions.

Abstract: A diecasting machine is provided with a mold and an injection plunger to inject and fill molten metal in the mold by an advancement of the injection plunger. The diecasting machine includes an electric servomotor and a hydraulic drive source. The electric servomotor is usable as a first drive source capable of driving the injection plunger at an advancing speed lower than 1 m/sec, while the hydraulic drive source is usable as a second drive source capable of driving the injection plunger at an advancing speed not lower than 1 m/sec.

Abstract: A vacuum casting die simpler in configuration and improved in seal performance in vacuum casting using a slide core, provided with a pair of main dies, a sealing member for seamlessly and continuously sealing mating faces around the closed space formed between the main dies, and a slide core housed in the sealed space formed between the main dies sealed by the sealing member.

Abstract: A die-casting device at least includes a housing having a seat, a lower mold mechanism at the seat, an oil-pressured injection mechanism joined with a lower section of the lower mold mechanism, and a corresponding upper mold mechanism disposed at an upper section of the housing and driven by an oil-pressured mechanism for up-and-down movements; wherein, the lower mold mechanism is devised as a structure with an outwardly inclined angle. Thus, when adding a metal liquid to the die-casting device, the lower mold mechanism is first inclined outward, such that when the metal liquid is flowed in to a material reservoir of an injection mechanism, a flow speed of the metal liquid is reduced to avoid formation of the bubbles, thereby preventing finished die-casting products from containing bubbles and thus elevating product quality.

Abstract: A die casting machine obtain to obtain a suitable reduced pressure and reliably prevent the entry of molten metal into a valve when reducing the pressure in a cavity and injecting and filling it with a molten metal for casting, provided with the valve for opening and closing an exhaust path, a position detector for detecting an open/closed state of the exhaust path by the valve, an injection apparatus, a position detector for detecting the position of the injection plunger, and a control apparatus for controlling the injection. The control apparatus outputs a control instruction for making it close the exhaust path to the valve when the detected position of the injection plunger reaches a valve closing position set before the speed switching position and stops the drive of the injection plunger when not detecting completion of closure of the exhaust path when the injection plunger reaches the speed switching position.

Abstract: A casting device for metallic product includes a main unit 1 having a pressurizing chamber 14 and casting cavities 16 for accommodating a metallic material M, a pressurizing unit 3 for pressurizing the metallic material M contained in the pressurizing chamber 14 to cause the metallic material to flow into the casting cavities 16 and a blade unit 4 provided between the pressurizing chamber 14 and the casting cavities 16. The blade unit 4 includes a scraper edge 41 for scraping the outer layer of the metallic material M pressurized by the pressurizing unit 3. After the end of the scraping operation for the outer layer M2 of the metallic material M, the blade unit 4 is moved by the first driving unit 51 from the scraping position A1 to a disengaging position. Thereby, the metallic material can be readily separated from the blade unit.

Abstract: The present invention is related to a rotary cooling station to be used in conjunction with a high output injection molding machine and a robot having a take-out plate. More particularly, the present invention teaches a high speed robot that transfers warm preforms onto a separate rotary cooling station where they are retained and internally cooled by specialized cores. The preforms may also be simultaneously cooled from the outside to speed up the cooling rate and thus avoid the formation of crystallinity zones. Solutions for the retention and ejection of the cooled preforms are described. The rotary cooling station of the present invention may be used to cool molded articles made of a single material or multiple materials.

Abstract: A die-casting machine provided with a sleeve through which molding material is injected into a cavity formed by a pair of mold dies, an injection plunger slidably mounted in the sleeve, an injection cylinder having an injection piston connected through a piston rod with the injection plunger, and a boost cylinder formed with an inner diameter larger than that of the injection cylinder and mounted adjacent to the injection cylinder thereon in a side opposite to the piston rod, wherein the injection cylinder and boost cylinder are communicated with a conduit connected to each hydraulic chamber on a piston rod side of the cylinders and connected to a flow rate control valve arranged on a side of meter out with respect to the cylinders, thereby controlling a speed of the injection plunger in accordance with a flow rate of pressurized oil flowing in said valve, wherein the machine further provides a switching valve for supplying pressurized oil to the boost cylinder when reaction forces acting on the injection plu

Abstract: A die-casting machine provided with a sleeve through which molding material is injected into a cavity formed by a pair of mold dies, an injection plunger slidably mounted in the sleeve, an injection cylinder having an injection piston connected through a piston rod with the injection plunger, and a boost cylinder formed with an inner diameter larger than that of the injection cylinder and mounted adjacent to the injection cylinder thereon in a side opposite to the piston rod, wherein the injection cylinder and boost cylinder are communicated with a conduit connected to each hydraulic chamber on a piston rod side of the cylinders and connected to a flow rate control valve arranged on a side of meter out with respect to the cylinders, thereby controlling a speed of the injection plunger in accordance with a flow rate of pressurized oil flowing in said valve, wherein the machine further provides a switching valve for supplying pressurized oil to the boost cylinder when reaction forces acting on the injection plu

Abstract: A plunger tip for attachment to the forward end of a plunger rod for forcing molten metal from the shot sleeve into the die of die-casting apparatus. The plunger rod has a threaded socket extending axially inward from its forward end and a tube for coolant extending forward out of its forward end. The plunger tip includes an annular body having a rearward end portion and an integral cylindrical hollow extension. The body has a part-spherical recess. The tip also includes an elongate tubular fitting having a spherical formation seated in sealed relation in the part-spherical recess. In addition, the fitting is held in assembly with the body with the spherical formation in the part-spherical recess by retainer fastened on the rear face of the body. The retainer is formed to provide a part-spherical recess complementary to the above-mentioned part-spherical recess providing a spherical recess having the spherical formation of the fitting therein in sealed relation to the body and retainer.

Abstract: The inside of a cylinder is divided into front and rear cylinder chambers, a primary-side piston and a secondary-side piston, each formed by an annular disc part and an annular tube part are fitted into each cylinder chamber, with the annular tube parts of each loosely fitted together, and the secondary-side piston surrounding an operating piston rod so as to hold the operating piston and being fit into the operating piston. The first front cylinder chamber and the second rear cylinder chamber defined by the primary- and secondary-side pistons are connected by a communicating passageway with a relief valve inserted therein, this relief valve being switched to the open condition by either a prescribed pressure or a valve opening/closing bar that is provided upright on the primary-side piston.

Abstract: An automatic molten metal supply and injection device which can prevent mixing of air into molten metal being supplied, which can reduce the possibility of explosion and the development of pores, and which makes it possible to supply molten metal irrespective of whether the molds are open or closed. The device includes a body for guiding molten metal, a sleeve having a suction port and a discharge port for opening and closing communication between a molten metal passage of the body and the suction port, a first piston axially movably mounted in the sleeve for sucking molten metal in the sleeve into a predetermined amount through the suction port and extruding the thus sucked molten metal through the discharge port, and a second piston axially movably mounted in the first piston for opening and closing the discharge port and for pressurizing molten metal being discharged through the discharge port. The first and second pistons are movable independently of each other.

Abstract: A rotor core (12) of a squirrel-cage rotor of an induction motor is housed in a recess (14) of a mold (18) of a conductor casting apparatus (10). A composite cylinder device (68) is fixed on the upper side of the mold (18) or on the side remoter from the pouring gate thereof, and the rotor core 12 is held in a predetermined position in the recess 14 by one piston (70). The other piston (72) locally pressurizes a molten metal that fills an end-connector ring cavity (66) defined between the rotor core (12) and the recess (14) on the side remoter from the pouring gate.

Abstract: The device includes a cavity defined by a fixed die and a movable die; a plunger disposed in a runner connected to the cavity in such a manner as to be movable to and from a gate of the cavity; a molten metal inlet formed midway in the runner; wherein molten metal supplied from the molten metal inlet in the cavity is pressurized by the advance of the plunger. This die device further includes an auxiliary die unit having a runner and a molten metal inlet connected to the cavity, which is disposed in a border of the fixed die; wherein excessive solidified metal is produced in the vicinity of the molten metal inlet of the auxiliary die unit.

Abstract: A vertical frame supports a rotary indexing table which carries a pair of vertical shot sleeves each having a shot piston with a depending shot piston rod. The shot sleeves are alternately indexed between a metal receiving station and a metal transfer station where a mold is supported above the table by a gate plate mounted on the frame. A hydraulic ejection cylinder and a substantially larger hydraulic shot cylinder are supported by the frame under the metal receiving and transfer stations, respectively, and laterally sliding couplings alternately connect the shot piston rods to the hydraulic cylinders when the table is indexed 180.degree.. Each shot piston and the gate plate form a biscuit which is retracted into the shot sleeve at the transfer station by the shot cylinder and is ejected at the receiving station by the ejection cylinder after the table and shot sleeves are indexed.

Abstract: A variable volume metal delivery system for a die casting machine. The system includes a shot sleeve having a plunger propelled by a shot cylinder. A stroke adjustment rod operated by a second cylinder extends into the shot cylinder to define the backward stroke limit of the shot cylinder and consequently that of the plunger. The stroke adjustment rod is movable by means of the second cylinder between a high-volume position, permitting a relatively long stroke, and a low-volume position, providing a relatively short stroke. Accordingly, the volume of the shot sleeve can be changed easily, for example, to accommodate the manufacture of articles either with or without structural inserts.

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: In a method and apparatus for supplying a molten metal, a supplying operation of the molten metal is started after a molten metal discharge port formed in a lower end portion of a molten metal supply sleeve facing down on a bottom portion of a molten metal supply vessel is positioned right above a plunger chip located at a lower position within an injection sleeve of an injection apparatus. The injection sleeve and the plunger chip are simultaneously lowered in accordance with the supplying operation of the molten metal.

Abstract: A plunger for forcing molten aluminum or brass out of a casting cylinder of a diecasting machine includes a cap which is screwed via an internal thread onto an external thread of a supporting body and is made of a material, in particular a copper alloy, which has a greater coefficient of thermal expansion than the material of the cylinder, in particular steel, and the material of the supporting body, in particular steel. An inner cover face of the cap bears against a front face of the supporting body and, with its internal thread, is screwed thermally onto the external thread of the supporting body, and in addition, is preferably shrunk on thermally.

Abstract: A pressing mechanism for a casting apparatus comprises: a mold including a cavity for solidifying molten metal therein and a biscuit portion and a runner portion for introducing the molten metal therethrough into the cavity; a unit for supplying molten metal into the cavity, the unit having a sleeve to store molten metal and capable of communicating to the runner and a plunger tip in the sleeve, the plunger tip being capble of protruding from the sleeve so that the molten metal is fed into the mold after the sleeve is communicated to the biscuit portion, the tip being capable of protruding into the biscuit portion; a feeding rod disposed in the mold for freely protruding into the runner; and a unit for reciprocating the feeding rod. The tip approaches to a ceiling surface of the biscuit to a range of 0.5 to 5 mm. The tip may have a projection at its top face.

Abstract: The plunger tip includes a closed, one-piece wear ring, the outside diameter of which is sized nominally to the bore of the shot cylinder. A cap is provided, a portion of which having an outside diameter which just fits inside the wear ring. The cap is elongated and has a tip end and an attachment end. An annular shoulder portion is located near the tip end, which shoulder portion is larger than the diameter of the rest of the cap and butts against the wear ring. A collar is slid onto the cap so as to capture the wear ring between itself and the shoulder of the cap. The cap includes flats at the attachment end, and the collar includes flats on an inside surface thereof which match with the flats of the cap for preventing relative rotation between the cap and the collar. The cap is provided with threads formed on its attachment end, the plunger shaft having matching threads by which the plunger shaft is connected to the cap.

Abstract: A casting appartaus comprises; a mold including a cavity for solidifying molten metal therein, and a runner and a biscuit portion for introducing the molten metal into the cavity; a unit removably mounted in the biscuit portion for feeding the molten metal through the biscuit portion and runner into the cavity; and a feeding rod disposed in the mold for freely protruding into the runner, and a unit for reciprocating the feeding rod. A mechanism for selecting communication and non-communication between the biscuit portion and the runner may be formed in the casting apparatus. After the molten metal is filled in the mold, the feeding rod is actuated to compress the molten metal in the mold.

Abstract: A plunger tip for use in the die casting process has an interior ball and socket arrangement wherein the plunger head is pivotable in relation to the plunger rod for correcting slight misalignments between the plunger head and the shot sleeve. A longitudinal through bore and a series of radial transverse bores are included to provide a continuous path for coolant fluid.

Abstract: A vertical die casting apparatus comprises a mold clamping unit having a mold axis and a tilting injection unit. The mold clamping unit in cooperation with a machine base is made to swing about a rotation axis from a normal horizontal axis position at which the mold axis extends horizontally and the injection unit is actuated for a vertical injection, to a vertical axis position at which the mold axis extends vertically, and a disintegratable core incorporated in the mold to define a mold cavity.

Abstract: A vertical die casting machine of a vertically clamping type provided with a hydraulic piston-cylinder to actuate movable parting plates disposed between an injection sleeve and a runner hole in a stationary mold for constricting a melt passage, the parting plates defining an axial through-hole in a clamped state. The parting plates prevent a semi-solidified part of the melt "shell" formed in the sleeve before an injection operation from intruding into a die cavity with the liquid melt. In an embodiment with a narrow runner hole having a diameter smaller than that of the sleeve, the parting plates move together to shear a cold melt runner from the cold melt bisket formed in the sleeve so that a cast product may be upwardly removed from the stationary mold.

Abstract: An improved shot tip for a metal injecting shot sleeve wherein the tip comprises a beryllium-copper alloy head having a domed front face and an interior cooling chamber. A baffle is located on the end of a coolant exhaust tube inside of the coolant chamber. Coolant water enters the shot tip head by flowing around the outside of the tube and exits the shot tip head through the tube itself, the aluminum baffle and a flow directing deflector.

Abstract: An article comprising a first portion which is formed porously by sintering of an alloy or cermet material and a second portion which is formed of a metal and intimately bonds to the first portion. For example, the article is a rocker arm for an automotive internal combustion engine, in which first portion is the wear-resistant tip portion and the second portion the body portion. The second portion is formed by molten metal forging, with the sintered first portion set in the mould as an insert, such that the molten metal under pressure is forced to infiltrate into the pores of the sintered first portion at least in a region contiguous to the interface between the first and second portions. This article features very high strength of the bond at the interface between the first and second portions.

Abstract: An apparatus for the production of die-cast parts is described, wherein the melt is pressured under a low pressure into a die where it solidifies. A casting unit has a drive piston guided in a casting cylinder and connected to a casting piston. The casting piston is equipped with terminal stops in both directions. The casting piston, which has a large cross-section, is able to travel into a movable half of the die. The casting cylinder is displaceably supported on a guide in the direction of the axis of the drive piston, with the terminal stops being adjustable relative to the drive piston and relative to each other. A signal transducer is associated with the stroke path of the drive piston and detects the end position of the casting piston within the moving half of the die.

Abstract: Apparatus for measuring injection speeds of a die casting machine comprises a detecting device for detecting injection times at low and high speed injection strokes, calculating elements for calculating low and high injection speeds by dividing the low and high injection strokes by the injection times, and displaying elements for displaying the low and high injection speeds as average injection speeds. The injection time detecting device includes an elongated member having different magnetic characteristics, an element responsive to the characteristics to generate pulse signal, low and high speed injection limit switches, and a discriminating element for discriminating the period of the signal generated by the pulse signal generating element. The injection speeds of the die casting machine can be measured and displayed by the interrelative operations of the elements and devices described above.

Abstract: An injection piston for a die casting machine comprising, a piston die having a chamber therein open at one end, a die rod having an end slidable in the chamber for changing the volume thereof. A coolant is supplied to the chamber to act as a damper to the movement of the die rod toward the press die when the injection piston is moved under pressure into a mold. The coolant flows in a coolant path comprising a feed path defined in the die rod and a discharge path at least a portion of which is defined between the press die and the die rod and the rest of which is defined in the die rod. A slidably mounted immersion valve is in the end of the die rod adjacent the chamber and movable into a neutral, a first and a second position for selectively permitting the flow of coolant into and out of the chamber, blocking the flow of coolant altogether and permitting the flow of fluid only out of the chamber depending on the increase of pressure exerted on the injection piston as it is forced into a mold.

Abstract: A vertical die casting machine comprising: a casting cylinder, pivotably mounted to a base, for activating a piston extension slidably fitted in a casting sleeve, and; a hollow block having an upper end connected to the casting sleeve and having a bore reduced at a lower end thereof through which bore the piston extension extends into the block. The block is forced to move by a ram cylinder relative to the casting cylinder. The piston extension has a radial extension in the block designed so that an engagement of the radial extension with the reduced bore end of the block causes a positional relationship between the casting sleeve and the piston extension to be maintained constant during an axial downward movement of the piston extension driven by the casting cylinder and during an axial upward movement driven by the ram cylinder.

Abstract: A die casting machine for manufacturing impellers made of Ni-, Co- or Fe-based heat resistant alloys. A die assembly which is provided with a plurality of radially retractable segments, is coaxially arranged and vertically movable with respect to an injection assembly. Die casting is effected in the lowermost position of the die assembly with the segments closed. The product is ejected out of the machine in the uppermost position of the die assembly with the segments retracted. A short runner minimizes heat dissipation of the molten metal and improves uniformity and quality of the product.

Abstract: A method and apparatus for monitoring the operation of a reciprocating liquid injection unit wherein charges of an injection liquid, such as molten metal, are injected one-by-one to a point of consumption, such as an injection molding die, by an injection plunger reciprocating in a sleeve and driven by a double acting hydraulic cylinder and fluctuations in the oil pressure on the return side of the hydraulic cylinder are monitored to detect abnormal increases in such pressure which indicate the occurrence of dragging between the injection sleeve and the plunger head.

Abstract: A vacuum apparatus comprises a frame which carries two vertical plates with a mobile plate mounted in guides therebetween. One die portion or part of a split die is rigidly fixed on the mobile plate by means of a die holder telescopically connected to a vacuum casting chamber housing rigidly mounted on a stationary plate which carries the other die portion or half of said die. Air-tight seals are provided at the housing joints and the housing is provided with viewing ports and with means for cleaning a die cavity.

Abstract: A molten metal injecting device for a cold chamber type die casting machine wherein a cavity is provided in which a metal cast body is formed between a movable die and a stationary die. Molten metal in an injection sleeve is injected into the cavity by a piston through a narrow gate. The sleeve has a feeding port for introducing the molten metal. An opening is provided in the sleeve in which the piston on the end of the plunger is exposed partially between the feeding port of the sleeve and the inserting end of the plunger. Lubricant spraying nozzles and compressed air blowing nozzles are arranged towards the opening, and a mechanism is provided for rotating the piston.