Abstract: A direct-acting type diecasting machine having an inexpensive and simplified hydraulic circuit is provided, which includes: a mold clamping cylinder for clamping and opening/closing a mold in a direct-acting manner; a single two-way hydraulic pump driven by a driving motor for supplying hydraulic fluid to the mold clamping cylinder in two directions; a hydraulic circuit for driving the mold clamping cylinder by controlling supply of hydraulic fluid from the two-way hydraulic pump to the mold clamping cylinder and discharge of hydraulic fluid from the mold clamping cylinder which proceeds in accordance with movement of a piston of the mold clamping cylinder; and a hydraulic controller for controlling rotational speed of the driving motor associated with the two-way hydraulic pump in opening/closing the mold at high speed and controlling torque of the driving motor in clamping the mold.

Abstract: An injection molding apparatus includes a melt furnace and a metal supply system located in the melt furnace. The metal supply system includes a pump. The injection molding apparatus also includes a first metal inlet from the melt furnace to the metal supply system and a vertical injection mechanism adapted to inject liquid metal into a die system. The injection molding apparatus also includes a second metal inlet from the metal supply system to the vertical injection mechanism.

Abstract: An injection apparatus in a cold chamber die casting molding machine, where a melting device of the injection apparatus includes a billet supplying device for replenishing a light metal material in the form of a billet, a melting cylinder for melting the billet from its front end and forming a molten metal for several shots, an inserting device for inserting a billet into the melting cylinder, and a plunger injection device. The amount of a molten metal for one shot is measured via an opening and shutting device of a molten metal feeding member and is fed from the melting device to the plunger injection device. In particular, the sealing of the molten metal in the melting cylinder is achieved by the contact of the side surface of a portion of the billet having an enlarged diameter with the hole of the cylinder, or by the contact of a circular solidified material formed in a circular groove in a cooling sleeve with the billet.

Abstract: The invention provides a plunger tip for die casting machines which is excellent in slidability and sealing properties. The plunger tip comprises a tip main body (20) and is slidable inside a plunger sleeve (60) for pushing out a molten metal into a die. The tip main body (20) is made of a metal material and covered over an outer peripheral surface thereof with a slide sleeve (40) made of a rigid resin material exhibiting high slidability and excellent sealing properties on the inner surface of the plunger sleeve.

Abstract: The provision or use, for the pressure casting of magnesium alloy in a molten or thixotropic state with a pressure casting machine having a mould or die which defines a die cavity, of a metal flow system which includes a die or mould tool means which defines at least one runner from which molten magnesium alloy is able to be injected into the die cavity. The metal flow system is of a form providing for control of metal flow velocities within the flow system, whereby substantially all of the metal flowing throughout the die cavity is in a viscous or semi-solid state. Filling of the die cavity is able to proceed progressively by semi-solid fronts of metal moving away from a gate or other site of injection.

Abstract: An injection unit for a hot-chamber die-casting machine has an injection portion with a gooseneck and a nozzle adaptor. The injector portion has a base portion at an end of the gooseneck adapted to receive a molten medium supply. A nozzle at an end of the nozzle adaptor is adapted to inject the molten medium supply in a die cavity. A channel between the base portion and nozzle is adapted to convey the molten medium supply therethrough. A piston chamber in the base portion is actuatable to draw the molten medium supply therein and to direct the molten medium supply in the channel for injection into the die cavity. An actuation portion is connected to the gooseneck to actuate the piston chamber. Heating cartridges are received in the injection portion adjacent to the channel to control temperature of the molten medium supply in the channel.

Abstract: A molding device includes a lower mold unit and an upper mold unit. A molding cavity is defined between the mold units. The lower mold unit has a storing chamber connected to the molding cavity. The upper mold unit has a damper chamber connected to the molding cavity. A pressurizing rod is inserted into the damper chamber. The pressurizing rod is actuated by a cylinder. When a pushing rod pushes molten metal in the storing chamber to the cavity, an excess amount of the molten metal enters the damper chamber. Therefore, the molding operation is reliably performed even if an excessive amount of molten metal is injected into the storing chamber. Further, the pressurizing rod pressurizes the excess amount of metal in the damper chamber.

Abstract: A metal flow system, for high pressure die casting of alloys using a machine having a pressurized source of molten alloy and a mould defining at least one die cavity, defines a metal flow path by which alloy received from the pressurized source is able to flow into the die cavity. A first part of the length of the flow path includes a runner and a controlled expansion port (CEP) which increases in cross-sectional area, in the direction of alloy flow, from an inlet end of the CEP at an outlet end of the runner to an outlet end of the CEP. A CEP exit module (CEM) forms a second part of the length of the flow path from the outlet end of the CEP. The increase in cross-sectional area of the CEP is such that molten alloy, received at the CEP inlet end at a sufficient flow velocity, undergoes a reduction in flow velocity in its flow through the CEP whereby the alloy is caused to change from a molten state to a semi-solid state.

Abstract: In the method of deoxidation casting, a disused metal left in a feeder head can be easily removed from a cast product, or the molten metal left in the feeder head can be removed from the cast product so as to easily finish the cast product. The method comprises the steps of: pouring a molten metal into a cavity of a casting die; and reacting a deoxidizing compound with the molten metal so as to deoxidize an oxide film formed on a surface of the molten metal. And the method is characterized in that rate of cooling the molten metal in a feeder head of the casting die is lower than that in the cavity, and that the molten metal in the feeder head, which is not solidified, is treated when the molten metal in the cavity is solidified so as to make an outline of a cast product correspond to that of a desired product.

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: While a die cast product is produced by a die casting method, an overheated portion of a low pressure die casting metallic pattern is effectively cooled by circulating a cool air and/or a coolant. Therefore, a solidification period of a molten metal in a cavity is minimized, and a quality of products and a durability of the metallic pattern are improved.

Abstract: The present invention provides coating systems that minimize thermal and residual stresses to create a fatigue- and soldering-resistant coating for aluminum die casting dies. The coating systems include at least three layers. The outer layer is an alumina- or boro-carbide-based outer layer that has superior non-wettability characteristics with molten aluminum coupled with oxidation and wear resistance. A functionally-graded intermediate layer or “interlayer” enhances the erosive wear, toughness, and corrosion resistance of the die. A thin adhesion layer of reactive metal is used between the die substrate and the interlayer to increase adhesion of the coating system to the die surface.

Abstract: An injection device for a light metal injection molding machine includes a melting device for melting light metal material into molten metal, plunger injection device for carrying out injection of molten metal using a plunger after the molten metal is metered into an injection cylinder from the melting device, connecting member including a connecting passage for connecting the melting device and the plunger injection device, and backflow prevention device for preventing backflow of molten metal by opening and closing the connecting passage.

Abstract: A runner cooling block for use in a die casting system comprises a spreader block, a spreader, a bushing block, a sprue bushing and a water jacket. The sprue bushing comprises a sprue channel running through an interior of the sprue bushing and a cooling channel running circumferentially around an exterior surface of the sprue. The sprue bushing, water jacket and bushing block are assembled to allow cooling water to pass through the cooling channel. The spreader block and the bushing block are assembled such that the spreader is centrally located within the sprue channel wherein molten metal is allowed to pass through the sprue channel for passage into the runner system. The cooling channel includes at least one circumferential heat transfer contour to provide increased heat dissipation to enhance cooling of the molten metal passing through the sprue channel.

Abstract: A diecasting machine comprising a movable and a stationary die half which, when closed, define a die cavity. The diecasting machine further comprises a filling chamber for receiving liquid metal, plunger, a slidingly displaceable inside the filling chamber and mounted on a plunger rod, for ejecting the liquid metal from the filling chamber and for injecting it into the die cavity, and a device for supplying lubricants for the plunger in the filling chamber. At least one pipe or one nozzle having an opening directed towards the plunger is fastened on the plunger rod. The pipe or the nozzle is linked with a reservoir for the lubricant via a supply line. A water-based releasing agent is sprayed into the intermediate space between the plunger rod and the cylindrical inner wall of the filling chamber in the direction of the plunger during a period in which the plunger is at its final lift position after the liquid metal has been injected into the die cavity.

Abstract: The present invention provides improved heated manifolds, heaters and nozzles for injection molding, having a high strength metal skeleton infiltrated with a second phase metal having higher thermal conductivity. Also disclosed is method of forming a manifold, heater or nozzle preform and infiltrating the preform with a highly thermally conductive material. The invention also provides a method of simultaneously infiltrating and brazing injection molding components of similar or dissimilar materials together.

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: An apparatus for molding a metal material. The apparatus includes a vessel with portions defining a passageway through the vessel. An inlet is located toward one end and a member or agitation means is located within the passageway. A plurality of heaters are located a length of the vessel. The first of the heaters is located immediately downstream of the inlet and is a low frequency induction coil heater whereby the temperature gradient through the vessel's sidewall is minimized.

Abstract: A casting method and casting mold able produce a casting having an island and connecting portion is disclosed. A casting having a body, an opening provided so as to pass through the body, an island arranged separated from the body in the opening, and a connecting portion joining the island and body is cast using a casting mold. The casting mold is provided with a body gate connected to a body cavity for forming the body and an opening gate connected to an island/connecting portion cavity for forming the island and the connecting portion. The body gate and opening gate are connected to a runner through body pin gates and opening pin gates; in addition, a die casting mold able to suitably change between a three-part mold structure and a two-part mold structure to cast a die casting is disclosed. The three-part mold structure die casting mold, a movable mold, a first cavity, a connection sleeve, a first runner, a pin gate, and an extension sleeve.

Abstract: A mold M for molding a metallic product including a fixed mold section 2 and a movable mold section 1, wherein heating means 7 is provided in the fixed mold section and cooling means 10 is provided in the movable mold section, which means are controlled by a temperature control device 14 so that any desired temperature is obtainable. Also, as the heating and the cooling of the mold are not repeated, but the fixed mold section is always heated and the movable mold section is always cooled, it is possible to shorten the cycle times.

Abstract: The molding device comprises a lower mold unit and an upper mold unit. When the upper mold unit approaches the lower mold unit, a molding cavity is defined between the lower and upper mold units. The lower mold unit has a storing chamber that is communicated with the molding cavity. The lower mold unit comprises a pressure-decreasing mechanism and a pushing mechanism. A molten material is stored in the storing chamber. When the molding cavity is formed between the lower mold unit and the upper mold unit, the pressure-decreasing mechanism decreases pressure in the molding cavity. Afterwards, in sync with the operation that the upper mold unit pushing down a lower mold-holding member of the lower mold unit, an injection rod of the pushing mechanism pushes out the molten material in the storing chamber to the molding cavity. As a result, the efficiency of the molding operation is improved.

Abstract: A diecasting machine capable of realizing highly precise injection of molten metal at high-speed without using an accumulator is provided, which includes: an injection cylinder for loading molten metal into a mold cavity by injection; a single two-way hydraulic pump driven by a driving motor for supplying hydraulic fluid to the injection cylinder in two directions; a hydraulic circuit for driving the injection cylinder by controlling supply of hydraulic fluid from the two-way hydraulic pump to the injection cylinder and discharge of hydraulic fluid from the injection cylinder which proceeds in accordance with movement of a piston of the injection cylinder; and a hydraulic controller for controlling rotational speed of the driving motor associated with the two-way hydraulic pump in injection/loading the molten metal and controlling torque of the driving motor in dwelling.

Abstract: An injection molding machine for low-melting point metallic material has an injection mechanism having a melting cylinder, an injection device, and a driving device. The driving device is disposed on the rear end of the melting cylinder for driving the injection device and includes a pedestal movable to advance and retreat freely to support the injection mechanism obliquely. A nozzle touch block on a tip end portion of the pedestal is touched obliquely by the nozzle member of the melting cylinder. A frame on a rear portion of the pedestal supports a rear portion of the injection mechanism and the driving device obliquely. A nozzle touch device touches an injection nozzle to a mold in the mold clamping mechanism by moving the pedestal with the injection mechanism toward the mold clamping mechanism.

Abstract: The invention relates to a method for vacuum diecasting and a diecasting mould (1), especially for diecasting components made of metal or the alloys thereof. The aim of the invention is to provide a better casting quality while simplifying the procedure of the method. To this end, the evacuation of the die cavity (5) and the filling with molten bath are carried out independently from one another.

Abstract: A die casting machine or an injection molding machine comprises a pressure member, such as a casting piston in a shot sleeve or extruder screw in an extruder barrel. A control unit is associated to this pressure member and/or to a filling system for filling the shot sleeve or the barrel. Moreover, an evacuation device is provided which includes a vacuum valve that communicates with the cavity of the die or mold, on the one hand, and a vacuum conduit on the other hand. This vacuum valve may be moved from an open position interconnecting the cavity and the vacuum source, and a closed position. There is a control connection between the control unit and the valve. The positions of the valve can be controlled by a material sensor located in its region and associated to it, the sensor supplying a closure signal to the valve through an output line. This output line, however, is also coupled to the control unit for influencing and controlling at least one of its controlled parts, i.e.

Abstract: A die-casting method and a device for use in the die-casting method are disclosed. The casting material, which can be liquid metal, semi-solid metal or metal-matrix composite, in the shot chamber of a die-casting machine is driven to flow with high shear rate to mix homogeneously by the electromotive force induced with at least one low-frequency shifting electromagnetic field. The temperature and the microstructure of the casting material near the shot chamber are further controlled and perturbed by at least one high-frequency electromagnetic field to minimize the temperature difference or the growth of dendritic microstructure. To ensure the efficiency of the electromagnetic fields, the shot chamber is made of non-magnetic material and its wall thickness is less than three times the penetration depth of the electromagnetic fields. The shot chamber is surrounded by at least one solenoid coil, a conducting shield and at least one electric motor stator.

Abstract: The method of casting of the present invention is capable of making volume of a feeder head can be small and making cooling rate of the feeder head can be easily made lower than that of a cavity. The method is executed in a casting machine, which includes a casting die, in which the feeder head is provided between a metal inlet and the cavity and in which heat insulating of the feeder head is greater than that of the cavity so as to make cooling rate of the feeder head lower than that of the cavity. The method comprises the steps of: pouring a molten metal into the cavity; reacting the molten metal on a deoxidizing compound in the cavity so as to deoxidize an oxide film formed on a surface of the molten metal; and supplementing the molten metal in the feeder head to the cavity when the molten metal in the cavity is solidified and shrinked.

Abstract: The invention provides a molding die in which a whole or a part of an exclusive portion forming a cavity can be swiftly changed while leaving a general portion in a molding machine. A fixed insert, a movable insert, a pressing plate and a slide core which correspond to an exclusive portion can be automatically attached to and detached from a fixed main die, a movable main die, a pressing rod and a slide holder which correspond to a general portion by an attaching and detaching mechanism. Further, the fixed insert, the movable insert, the pressing plate and the slide core can be integrated in a die close state by a connection mechanism.

Abstract: A die casting machine injecting and filling a molten metal into a cavity formed between a pair of dies so as to cast a product, comprising an ejecting pin for ejecting a casting by its front and sticking out inside the cavity and a powder feeder for feeding a powder release agent for promoting release of the casting from the dies, the ejecting pin including a release agent feed path for guiding powder release agent fed from the powder feeder to a front end of the ejecting pin and feeding it to the cavity.

Abstract: A vertical injection machine and method for injecting liquid metal. The machine includes a metering chamber, a vertical injection chamber, and a first conduit connecting the metering chamber to the injection chamber. The height of liquid metal in the metering chamber determines the volume of metal in the injection chamber.

Abstract: A vacuum die casting apparatus includes a casting cavity (10), which is evacuatable via a vacuum valve (26). A liquid casting material is pressable into the casting cavity by a piston (14) actuated by an actuator (17). A filling level sensor (20) detects a predetermined filling level of the casting material in the casting cavity. A control device (34) is connected to the filling level sensor for controlling the vacuum valve, and a position sensor (32) is connected to the control device (34) for detecting movement of the piston (14). The control device generates a closing signal for the vacuum valve (26) when the piston, after reaching the position (s1) at which the filling level sensor (20) indicates a predetermined filling level of the casting cavity (10) with casting material has been reached, is displaced in a predetermined manner.

Abstract: An injection molding apparatus includes a melt furnace and a metal supply system located in the melt furnace. The metal supply system includes a pump. The injection molding apparatus also includes a first metal inlet from the melt furnace to the metal supply system and a vertical injection mechanism adapted to inject liquid metal into a die system. The injection molding apparatus also includes a second metal inlet from the metal supply system to the vertical injection mechanism.

Abstract: A metal injection molding apparatus is provided with features which reduce the amount of metal which enters the drive mechanism of the apparatus. The apparatus contains a piston having the head and the shaft, the shaft having a diameter smaller than the diameter of the head. At least one piston ring circumscribes the piston shaft. The apparatus contains an injection chamber having an accumulation portion and a shaft housing portion. The shaft housing portion has openings in the sidewalls and a polygonal internal cross section. The accumulation portion of the injection chamber is maintained at a higher temperature than the shaft housing portion.

Abstract: Provided is an apparatus for continuously manufacturing a plurality of high-quality billets containing fine, uniform spherical particles, with improvements in energy efficiency and mechanical properties, cost reduction, convenience of casting, and shorter manufacturing time.

Abstract: According to the present invention, between the mold-clamping process S1 in which the mold 1 is closed and the injection-pressure increase (solidifying) process S3, the gate-melting process for heating the hot runner 21 to melt the plug (metallic material) of the gate 27, the mold-lubricant coating process for spraying the lubricant onto the wall surface of the cavity 10, and the material-metering process are simultaneously carried out in parallel to each other. Thus, the molding cycle time can be reduced to a great extent.

Abstract: Provided is a rheoforming apparatus that ensures the manufacture of products with fine, uniform spherical particles, with improvements in energy efficiency and mechanical properties of the products, cost reduction, convenience of forming, and shorter manufacturing time. The apparatus includes a first sleeve, an end of which is formed with an outlet vent for releasing slurries; a second sleeve for receiving molten metals, an end of the second sleeve being hinge-connected to the other end of the first sleeve at a predetermined angle; a stirring unit for applying an electromagnetic field to an area of the second sleeve in which the molten metals are present; a plunger, which is inserted into the other end of the second sleeve to block the other end of the second sleeve for receiving the molten metals and to pressurize the slurries; and a forming unit, which is connected to the outlet vent of the first sleeve to form products with a predetermined shape using the slurries.

Abstract: A mold that has an expandable mold cavity that is maintained at a first volume during an injection phase and expands to a second volume during the solidification phase to inhibit or prevent the formation of voids or cracks in a material that expands during the solidification process and a method whereby the pressure within a mold cavity during the solidification process is limited to inhibit or prevent formation of cracks or fissures in a cast article that normally expands during solidification.

Abstract: A pouring apparatus for castings uses separate systems for supplying billets and delivering the semi-molten material, making it possible to readily modify the discharge flows and pressure. A pouring apparatus for castings that comprises solid material supply means for supplying solid material to a melting basin; heating means for heating the melting basin to semi-melt solid material supplied to the melting basin; a conveyance chamber provided adjacent to the melting basin; and delivery means for discharging, from a discharge nozzle, semi-molten material conveyed from the melting basin to the conveyance chamber.

Abstract: A method and apparatus for producing a metal component from a non-dendritic, semi-solid metal alloy slurry involves the use of a graphite agitator that is functionally equivalent to conventional metal rod agitators, and has the additional advantage of having a very low surface wettability, whereby labor and expenses associated with removing a metal alloy skin formed after withdrawal of the agitator from a metal slurry is eliminated or at least substantially reduced. The invention also provides an improved process and apparatus for producing a metal component from a non-dendritic semi-solid metal slurry by transferring the slurry to a cooling vessel for subsequent cooling and raising of the solids content without agitation after the slurry has been formed with agitation in a first vessel, whereby more rapid cooling of the slurry and increased production rates are achievable.

Abstract: A molten metal supply system (90) includes a plurality of injectors (100) each having an injector housing (102) and a reciprocating piston (104). A molten metal supply source (132) is in fluid communication with the housing (102) of each of the injectors (100). The piston (104) is movable through a first stroke allowing molten metal (134) to be received into the housing (102) from the molten metal supply source (132), and a second stroke for displacing the molten metal (134) from the housing (102). A pressurized gas supply source (144) is in fluid communication with the housing (102) of each of the injectors (100) through respective gas control valves (146). The molten metal supply system (90) is in fluid communication with an outlet manifold (140) having a plurality of outlet dies (404), which may be used to form continuous metal articles including rods, bars, ingots, and continuous plate.

Abstract: A fiber reinforced porous preform is positioned within a die cavity defined by upper and lower die members, and the lower die member defines at least one gate opening in the center portion of a water cooled shot sleeve which receives a vertically moveable shot piston. The area of the gate opening is small relative to the area of the shot sleeve, and the lower die member defines an annular recess above the inner surface of the shot sleeve for entrapping a shell of pre-solidified metal. Air vent slots extend outwardly between the shot sleeve and lower die member and are closed by the shell of pre-solidified metal. In one embodiment, the shot sleeve and shot piston are non-circular or oval in cross-section; and the lower die member has a plurality of longitudinally space gate openings.

Abstract: A molten metal feed apparatus which can feed molten metal into a casting apparatus by opening a vessel and which is free from leakage of the molten metal from the opening/closing part of the vessel, provided with a holding vessel having an opening at its bottom and holding a metal material, a lid for closing the opening, a drive means for making the lid move with respect to the holding vessel to open or close the opening, and an induction heating coil for heating the metal material by induction of a current to the metal material in the holding vessel and generating a magnetic field applying to the molten metal a force preventing leakage of the molten metal in the holding vessel from between the opening and the lid.

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: A metal alloy is heated to a molten state and is poured into a shot sleeve of a vertical die cast press and on top of a shot piston. The shot sleeve is transferred to an injection station while the molten alloy is cooled to a semi-solid slurry and a globular, generally non-dendritic microstructure. A retractable cooling pin is temporarily inserted into a center portion of the slurry while in the shot sleeve to obtain optimum cooling. A center portion of the slurry is injected upwardly by the piston through a gate opening into a die cavity while an outer more solid portion of the slurry is entrapped in an annular recess. After the slurry solidifies, the shot piston retracts, and the shot sleeve is transferred to a position where the residual biscuit is removed. Another shot sleeve filled with the molten allow is transferred, and the process is repeated.

Abstract: A vertical injection machine having a first chamber for supplying liquid metal, a second chamber located lower than the first chamber and a first conduit connecting the first chamber to the second chamber. The first conduit has a shutter rod disposed within and a valve head attached to a lower portion of the shutter rod. The valve head is adapted to seal a lower portion of the first conduit. A metering rod is disposed within the second chamber. The vertical injection machine also includes a vertically oriented third chamber and a second conduit connecting the second chamber to the third chamber. An injection rod is disposed vertically within the third chamber and a injection nozzle is located at an upper portion of the third chamber.

Abstract: A method for the refining of primary aluminum in hypoeutectic alloys by mixing at least two hypoeutectic alloys into a solid/semi-solid hypoeutectic slurry is described. The method provides control of the morphology, size, and distribution of primary Al in a hypoeutectic Al—Si casting by mixing a hypoeutectic Al—Si liquid with solid hypoeutectic Al—Si particles to impart desirable mechanical properties. The invention enables SSM molding of hypoeutiectic alloys without the need for secondary processing steps associated with other rheocasting processes.

Abstract: A method for injection molding a metallic material is disclosed in which an injecting material comprised of a half-solidified metallic material and a molten metallic material is injected into a cavity of a die from an injection cylinder through a gate thereof. A non-product portion remaining at the gate of the die is separated from a product portion while it is still hot. The separated high-temperature non-product portion is press-formed into a billet in the injection cylinder. Utilization of heat from the injecting material in melting the high-temperature billet enables reuse of the non-product portion remained at the gate and reduction of heat energy required in melting the billet.

Abstract: An injection molding machine for low-melting point metallic material has an injection mechanism having a tip portion, a melting cylinder and a rear portion holding a drive mechanism. The tip portion has a weighing chamber and a nozzle member feeding a mold. The melting cylinder is held at an oblique angle to promote gravity flow of the molten metal toward the tip portion. The melting cylinder encloses an agitating and injection mechanism that rotates and advances or retreats freely within the cylinder. One agitating and injection mechanism has a hollow shaft surrounding an injection rod tipped by an injection plunger that moves lengthwise in the shaft and agitating wings disposed around the tip end of the hollow shaft. The wings reach the inner sides of the cylinder and rotate. The plunger may extend beyond the shaft to be inserted in the weighing chamber.

Abstract: A material melting device of metal injection molding machine comprises a main feeding cylinder; a plurality of preheating feed cylinders parallel arranged at a lateral side of a main feeding cylinder of a metal injection molding machine; a plurality of material outlets formed at a side of each preheating feed cylinder. The material outlets are communicated to the main feeding cylinder through the guide tubes. Thereby, an inner side of the preheating feed cylinder is pre-heated so as to get preheated grains by adjusting the preheating screw rods in the preheating feed cylinder. Moreover, the preheating feed cylinders can be replaced by feeding funnels and the guide tubes are replaced by heating pipes.

Abstract: In metallic material injection molding machines, the connection between the injection nozzle and the sprue bushing has tended to leak metallic material. To overcome this problem, the nozzle has been modified to have a projecting portion or spigot that extends into a mating portion of the sprue bushing to form a seal between the respective portion walls. The nozzle and sprue bushing can move axially with respect to one another without loss of sealing whereas with the prior designs any separation between confronting annular surfaces on the sprue bushing and the nozzle would result in a loss of sealing and leakage.