Abstract: In an injection cylinder which can be connected with a plunger, the internal portion of the cylinder part is partitioned by a piston into a rod-side chamber on the side of the piston rod and a head-side chamber on the opposite side. An accumulator can supply a hydraulic fluid to the head-side chamber. A head-use pressure sensor can detect a pressure of the head-side chamber. A flow control valve can control a flow rate of the hydraulic fluid discharged from the rod-side chamber. A control device includes an OP control part which starts open control driving the flow control valve to the opening direction after the start of supply of the hydraulic fluid from the accumulator to the head-side chamber conditional on the detection pressure of the head-use pressure sensor rising up to the predetermined set value.

Abstract: A vacuum induction melting and strip casting equipment for rare earth permanent magnetic alloy includes a vacuum induction melting and strip casting chamber, a material receiving heat preservation treatment chamber, a cooling chamber and an isolation valve. The isolation valve is located between the material receiving heat preservation treatment chamber and the cooling chamber, the vacuum induction melting and strip casting chamber is located above the material receiving heat preservation treatment chamber, an outlet of a material guiding tube of the vacuum induction melting and strip casting chamber is corresponding to the material receiving heat preservation treatment chamber. Water-cooled electrodes, a vacuum pumping device, an inert gas introduction pipeline, a temperature measurement mechanism, a pressure gauge, a vacuum gauge and a safety valve are provided on the vacuum induction melting and strip casting chamber.

Abstract: The purpose of this invention is to provide a method for making upper and lower molds and an apparatus therefor that can prevent the resulting molds from being warped and match-plates from being broken. The method of this invention comprises the step of holding a match-plate 1 between cope and drag flasks 2 and 3, inserting upper and lower squeezing means 4 and 5 into the respective openings of the cope and drag flasks 2 and 3, which openings are opposite to the match-plate 1, so as to define upper and lower molding spaces, supplying molding sand to the upper and lower molding spaces, and then causing the upper and lower squeezing means 4 and 5 to move forward to the match-plate 1 so as to squeeze the molding sand and make upper and lower molds, wherein during the step of causing the upper and lower squeezing means to move forward to the match-plate the difference between the squeezing pressures of the upper and lower molding spaces is kept within a predetermined tolerance.

Abstract: Systems and methods allow detection and location of die coolant leaks while a die is in a die cast machine and at operating temperature. The testing can be performed during normal down time of the die casting assembly and repeated as desired. Cooling circuits of the die can be tested in zones where zones are sorted to identify particular cooling circuits as having leaks as necessary. Valving, leak sensors, air decay units, and added machine control are provided in the die cooling system to enable onboard leak testing of the die while installed in the die casting machine.

Abstract: A device for low-pressure casting wherein the stalk or the guiding tube is filled with inert gas by causing the space formed over the molten metal in the pressurizing room to communicate with the stalk or the guiding tube.

Abstract: A gas pressure controlled casting mold is disclosed having a hot-top introducing a molten metal of aluminum or aluminum alloy, and a mold body which passes the molten metal of aluminum or aluminum alloy introduced from the hot-top through a molten metal passage portion for cooling and solidification and semi-continuously or continuously casting a billet of aluminum or aluminum alloy. A wall surface of the molten metal passage portion of the mold body is provided with a plurality of lubricating oil blow-out holes for blowing out a lubricating oil. A lubricating oil supply passage is communicatively connected to each lubricating oil blow-out hole and is independently formed at least in a range of a heat affected portion in the mold body. This allows the mold body to be reliably cooled regardless of the difference in the temperature and casting speed conditions and thus can achieve favorable continuous casting.

Abstract: The invention relates to a continuous casting installation (20) including a strand guide having strand casting segments with rollers (2) for guiding a cast strand, wherein at least one of the strand casting segments (22, 23, 24, 25, 26, 27) is formed as a measurement segment, wherein there is provided at least one measurement point for direct or indirect determination of a force acting on one or several rollers (2), wherein further the at least one measurement point is provided on a support housing (30), preferably between the support and the segment frame of strand casting segment, and there is provided a data processing unit that based on data of the at least one measurement point determines the solidification states of the cast strand.

Abstract: The purpose of this invention is to provide a method for making upper and lower molds and an apparatus therefor that can prevent the resulting molds from being warped and match-plates from being broken. The method of this invention comprises the step of holding a match-plate 1 between cope and drag flasks 2 and 3, inserting upper and lower squeezing means 4 and 5 into the respective openings of the cope and drag flasks 2 and 3, which openings are opposite to the match-plate 1, so as to define upper and lower molding spaces, supplying molding sand to the upper and lower molding spaces, and then causing the upper and lower squeezing means 4 and 5 to move forward to the match-plate 1 so as to squeeze the molding sand and make upper and lower molds, wherein during the step of causing the upper and lower squeezing means to move forward to the match-plate the difference between the squeezing pressures of the upper and lower molding spaces is kept within a predetermined tolerance.

Abstract: The object of the present invention is to provide a device for low-pressure casting wherein the stalk or the guiding hole is filled with inert gas by causing the space formed over the molten metal in the pressurizing room to communicate with the stalk or the guiding hole.

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 method of controlling the operation of an apparatus for making an upper and a lower mold and the apparatus therefore that prevents a mold from having a wrap or a match plate from being damaged. The apparatus controls the forward movement of an upper and a lower squeeze member such that when each moves forward to the match plate by a squeeze device, the difference in the squeeze forces imparted to the upper squeeze member and the squeeze force imparted to the lower squeeze member, is kept within the predetermined tolerance.

Abstract: A hydraulic power unit 15 of a match-plate molding machine comprises a hydraulic pump 20 for supplying oil, a piping system 21, 25, and 26 that fluidly communicates with first and second hydraulic cylinder systems 7 and 10 for supplying the oil from the hydraulic pump 20 to them to perform a squeeze step, an accumulator 22 that is provided within the piping system, first and second electromagnetic directional control valves 23 and 24 for controlling the flow of the oil from the hydraulic pump 20 to the first and second hydraulic cylinder systems 7 and 10, first and second pressure sensors 27 and 28 for measuring pressures of the oil of the first and second hydraulic cylinder systems 7 and 10, and for generating output signals that correspond to the measured value, and a controller 29 for receiving the output signals from the first and second pressure sensors 23 and 24, and for controlling the turns of the first and second electromagnetic directional control valves 23 and 24 based on the output signals and the

Abstract: A pouring method and a device in a vacuum sealed process to produce a thin-wall cast by using a mold framing for the a vacuum sealed process, and a as-cast product using the pouring method are provided.

Abstract: A sand-introducing-type sand molding machine is provided, wherein the apparatus produces a sand mold by leading molding sand into a molding flask or a molding space and filling the space with it by using compressed air, and controlling the pressure-variation inside the sand tank to cause it to correspond to the pattern shape by supplying the compressed air.

Abstract: A clamping force sensor system includes a clamping force sensor device, a signal-converting program carrier, and an output device. The clamping force sensor device includes a body mounted to a tie bar of a forming machine. The clamping force sensor device further includes a sensor mounted to the body, with a portion of the sensor exposed outside of the body. The signal-converting program carrier is electrically connected to the sensor by at least one signal line. The signal-converting program carrier includes a built-in program for converting a signal from the at least one signal line into a mold-clamping force. The output device is electrically connected to the signal-converting program carrier for outputting the mold-clamping force.

Abstract: A method for detecting a roller failure at a roller in a continuous casting machine having a plurality of rollers arranged in a row and rotatably supported in bearings for transporting material produced in the machine involves determining a radial target load value exerted by the material on a roller, measuring the actual load value on at least each second roller in the row of rollers, comparing the measured actual load value with the determined target load value, detecting a possible divergence between the actual load value and the target load value, and establishing the presence of a roller failure upon detection of such divergence.

Abstract: A method for detecting a seized or still standing roller in a track of rollers in a continuous casting machine, in which each roller is rotatably mounted in supporting members and is arranged with its axis substantially perpendicular to the longitudinal extent of the track so that the rollers are arranged to transport elongated material produced in the machine. The method includes measuring a load exerted on at least one supporting member of each roller, with the load being substantially parallel with the extent of the track. The existence of a seized or still standing roller is established when the load deviates from a predetermined value by virtue of a force induced on the roller by seizure or stoppage of the roller at the contact with the transported material.

Abstract: A method for detecting a misaligned roller portion of a roller in a continuous casting machine, in which the machine includes rollers arranged in a row after each other, with the rollers being divided into at least two roller portions each rotatably mounted in supporting members and arranged for transporting produced material. The method involves measuring the radial load exerted by the material on each supporting member of the roller portions of a roller, comparing the radial loads of the supporting members at the outer ends of the roller with each other, comparing the radial loads of the supporting members at the inner ends of the roller with each other, and determining a misaligned roller portion where the divergence between the radial loads of the supporting members of the outer ends of the roller and/or the supporting members of the inner ends of the roller exceed a predetermined value.

Abstract: A method for detecting an at least partly bulging portion of an elongated material produced in a continuous casting machine in which the machine has a plurality of rollers arranged in two tracks converging towards each other to transport the material, with the rollers being divided into at least two roller portions each rotatably mounted in supporting members. The method involves measuring the radial load exerted by the material on each supporting member of the roller portions of a roller, comparing the radial load values of the supporting members arranged in the ends of roller portions facing away from each other with those of the supporting members arranged in the ends of the roller portions facing each other to ascertain a divergence, and establishing that an at least partly bulging portion of the material exists where the divergence exceeds a predetermined value.

Abstract: A method for imaging inclusions in metal or metal alloy castings is described. One embodiment of the present method first involves casting a metal or metal alloy article using an investment casting mold where the mold facecoat, and perhaps one or more of the mold backup layers, comprises an imaging agent distributed substantially uniformly throughout in amounts sufficient for imaging inclusions. The facecoat preferably comprises an intimate mixture of a refractory material and the imaging agent. Intimate mixtures can be produced in a number of ways, but a currently preferred method is to cocalcine the refractory material, such as yttria, with the imaging agent, such as gadolinia. The facecoat also can comprise plural mold-forming materials and/or plural imaging agents. The difference between the linear attenuation coefficient of the article and the linear attenuation coefficient of the imaging agent should be sufficient to allow imaging of the inclusion throughout the article.

Abstract: An apparatus and process for casting a continuous metal strand, in particular steel, in a continuous casting apparatus having strand parts disposed opposite one another and being fitted with bearings in which guide rollers are mounted, and having actuators by which a gap between respective opposed rollers can be set infinitely variable, and which method includes sensing a value representing a compressive force which occurs in the bearings and feeding said value to a computing unit; comparing the individual measured force values of a roller or of a pair of oppositely disposed rollers with respect to a level of the force; and utilizing at least the relating highest value measured as a command variable for controlling the gap and/or the casting rate and/or the amount of cooling water and/or the melt feed and/or the casting powder feed and/or the mold oscillation.

Abstract: An apparatus and method for pressure casting a battery part wherein the state of molten lead is monitored so that when the molten lead enters a liquid-to-solid transformation stage, the volume of the mold available for the lead to solidify therein is quickly reduced through a volume contraction step to thereby cause the molten lead to flow into the remaining volume at the same time one maintains pressure on the molten lead. As the molten lead solidifies under the reduced volume and high pressure it produces a battery part that is substantially free of both tears and cracks. In an alternate method, the lead is allowed to solidify and at least a portion of the lead is mechanically deformed through a volume contraction step to cause cracks or tears in the battery part to be eliminated thereby providing a battery part free of cracks or tears.

Abstract: An automatic machine is designed to test performances of green sand molding and composed of a machine support, a feeding device, a vibration device, a testing device, a detecting device, and a catching device. The green sand is extracted by the feeding device and then screened in the vibration device The selected green sand is received and carried by a test piece sleeve of the catching device. The test piece sleeve is driven to move to the testing device for testing the compatibility of the green sand, to the detecting device for testing the permeability of the green sand, and to the loadcell for testing the green compressive strength of the green sand.

Abstract: A mold clamping system for clamping a first mold component to a second mold component in a continuous casting machine includes a tensioning rod that is connected to the first mold component, a support frame that is connected to the second mold component and a load cell member that has an inner portion, an outer portion and a force measuring mechanism for measuring the amount of axial force that is transmitted between the inner and outer portions. The inner portion is secured to the tensioning rod, and the outer portion is acted upon by a compression spring that is interposed between the support frame and the outer portion of the load cell member. In order to permit adjustment of the clamping force, the system also includes anti-biasing structure that is positioned to apply force to the outer portion of the load cell member for countervailing the biasing of the compression spring.

Abstract: A method for measuring the strength of a cavity surface (2a) of a mold (2) and for simultaneously pressing one or more marks (21a, 21b) in the cavity surface (2a) is disclosed. Such marks (21a, 21b) formed in a cavity surface of a mold are transferred to a cast when it is produced from the mold, and the transferred marks appearing on the surface of the cast display some information. The method includes the steps of pressing one or more marks (21a, 21b) in a cavity surface of a mold by using a press member (14) that has a pressure sensor (15), and measuring the strength of the mold (2) by detecting a reaction force by the pressure sensor (15) that acts on the press member (14) when the press member presses the mark in the cavity surface of the mold.

Abstract: An improved continuous casting mold and foot guide assembly includes a mold having a casting passage defined therein, a frame member, mounting structure for mounting the frame member to the mold for relative movement toward and away from an axis of the casting passage, and a strand support member for providing support to a strand of continuously cast material as it emerges from the casting passage. Biasing structure is provided for biasing the frame member toward the axis of the casting passage and, advantageously, is positioned so as not to occupy space that is behind the frame member. As a result, the assembly is compatible with all models of casting machines and will be less susceptible to degradation as a result of radiant heat and steam that is emitted from the strand during operation. In addition, a load cell is provided for monitoring the amount of relative force between the frame member and the strand during operation.

Abstract: A hold-down mechanism (88) is provided for holding a base plate (32) of a casting assembly (20) in engagement with a crucible (28). The hold-down mechanism (88) includes a plurality of Belleville-type washers (89) for allowing relative movement while maintaining a predetermined force holding the base plate (32) in engagement with the crucible (28). The hold-down mechanism includes a plurality of tension rods (90) and a plurality of forks (91) each having a pair of spaced fingers (92), each of the rods (90) being paired with one of the forks (91). Each of the rods (90) has a threaded end (93) and the Belleville-type washers (89) are disposed about the threaded end (93) of each of the rods (90) with a threaded nut (94) engaging the threads (93) of each of the rods (90) for compressing the washers (89) against the fingers (92) of the forks (91).

Abstract: A strip is continuously cast between rolls that includes a pair of rolls driven in rotation, two side dams urged against the ends of the rolls, and a jack for pressing the side dams against the rolls. The thrust force on the side dams is measured and the friction force exerted on the side dams by the rolls as a result of the rolls rotating is measured. From these measurements of thrust and friction forces, a coefficient representative of friction conditions between each of the surfaces of contact between the side dams and rolls is deduced and casting parameters are adjusted in response to the contact state between the surfaces.

Abstract: A method for cooling a plunger tip of a die-casting machine for maintaining a proper clearance between a plunger tip and a shot sleeve. A proper hydraulic pressure in an injection cylinder is determined at which no galling occurs in the shot sleeve. Hydraulic pressure in the injection cylinder is measured several times in a state where no molten metal exists in the shot sleeve. For example, measured is the hydraulic pressure in the injection cylinder at the time of return stroke of the plunger tip immediately after injecting operation. Average hydraulic pressure is computed based on the plurality of measured hydraulic pressure. The average hydraulic pressure is compared with the proper hydraulic pressure. If the former is greater than the latter, clearance between the plunger tip and the shot sleeve is deemed to be too small. Thus, supply amount of cooling liquid to the plunger tip is increased to reduce a diameter of the plunger tip.

Abstract: A gas venting system is connected to a downstream side of a gas vent valve through a gas exhaust line. An electromagnetic valve and a suction unit are connected to the gas exhaust line. A pressure switch is directly connected to the gas exhaust line to detect the pressure variation within the line. By the suction through the suction unit and the opening of the electromagnetic valve, the gas exhaust line is decompressed. If the line has a perforation, the pressure does not reach a predetermined pressure. If clogging occurs, the pressure reaches a predetermined pressure while the metal molds are open and the gas vent valve is open. Thus, accurate detection to the defects can be achieved regardless of the state of the metal molds and the internal volume of a vacuum tank.

Abstract: This invention relates to an injection pressure control apparatus for a die cast machine and an injection mold machine. In the injection pressure control apparatus, it detects whether the pressure increase state of the instance when the pressure of the injection cylinder is increased through a pressure increasing circuit is normal or not. When detecting the above state, the pressure change obtained at the instance when the pressure increasing circuit is operated is detected between two points, of which it is determined whether the time spent therebetween is within an allowable time or not and the result is indicated. Moreover, the pressure detected after the pressure increasing circuit was operated and a predetermined period of time has passed is determined whether it is within a predetermined allowable range or not and the result thereof is indicated.

Abstract: A method of producing a fiber reinforced metal composition is characterized by a unique and successful pressure exerting program for consolidating a fiber assembly fabricated into a desired configuration and a molten metal matrix. The program is generally constituted a first step in which relatively low pressure is exerted on the molten metal for consolidation of the fiber assembly and the molten metal and a second step in which pressure is instantly increased to a maximum pressure for solidification of the metal matrix.

Abstract: Apparatus is provided for giving an early warning of the occurrence of breakout of molten metal from a partially solidified cast strand downstream from a continuous caster mold. The apparatus includes a hollow body (preferably tubing) located adjacent to the strand. A source of fluid connected to the body is adopted to maintain substantially constant pressure of the flue therein. A monitoring device provides a signal when a significant drop in fluid pressure occurs in the body, so that an early warning of the breakout of molten metal and resultant fusion and opening of a hole in the wall of said body is provided.

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 furnace including a cooled mould having its bottom sealed with a bottom plate and its top sealed with a cooled vacuum chamber fitted with a cover carrying an electrode holder movably fixed therein. Mounted in the cooling spaces of the furnace units, filled with a liquid-metal cooling agent, are tubular heat exchangers intercommunicating with each other to form a closed circulation circuit filled with a coolant which is chemically neutral to the liquid-metal cooling agent and to water. The cooling spaces of the furnace units are filled with a liquid-metal coolant and communicate with an expansion chamber, as well as with a water heat exchanger through a heat-transfer circuit. Arranged intermediate the mould inner wall and its tubular heat exchanger is a shield made in the form of a hollow cylindrical wall.

Abstract: Casting material is delivered to molds arranged along a casting line by a pouring ladle mounting mechanism which includes a vertical column rotating about a vertical axis and a cantilever mounted at one end on the vertical column for rotation about a horizontal axis, and have a free end, opposite to the mounted end, upon which the ladle is mounted by a fork engaging outriggers on the ladle. Tilting of the ladle is effected by rotation of the cantilever and movement of the ladle through a horizontal plane is effected by rotation of the vertical column. The mechanism is transported along the casting line by a wheeled car moving on rails and a hydrodynamic sliding bearing mechanism arranged at the bottom of the vertical column acts as a weighing device to effect dosed pouring from the ladle.

Abstract: A portable vacuum investment casting apparatus includes a box-like housing having an upper generally flat supporting wall with a vertical conduit terminating in an opening in the top wall. A vacuum conduit is connected to the vertical conduit and terminates in an outer sidewall in large and small conical connectors to receive a conventional shop or household vacuum cleaner hose. A manually adjustable valve is connected in an exhaust pipe from the vacuum conduit for controlling the vacuum level. The apparatus is powered from a conventional household type vacuum cleaner device or similar fan unit which establishes a relatively high air flow with a relatively low vacuum. A small vacuum gauge tube is mounted on the front wall adjacent to the vacuum setting control. The top end is connected to the vertical conduit and the lower end has a supply tube with an adjustable end member to set the initial liquid level.