| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 141 | Method and apparatus for vacuum measurement during die casting | US10739580 | 2003-12-19 | US20050133191A1 | 2005-06-23 | Zachary Brown; Mark Musser; Joseph Bigelow |
| The method and apparatus of the present invention utilizes a computer and at least one pressure transducer for monitoring vacuum parameters in the operation of a die casting machine. A profile of the vacuum measurements are generated as a function of time and are graphically displayed on a shot monitor. The computer is optionally programmed with operator defined traces for comparison with acquired data profiles to segregate parts based on the comparison values. | ||||||
| 142 | Die-casting or injection molding machine | US10915833 | 2004-08-11 | US20050115693A1 | 2005-06-02 | Dominik Baumgartner |
| 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. pressure member and/or filling system. | ||||||
| 143 | Apparatus and method of forming parts | US10151520 | 2002-05-16 | US06598658B2 | 2003-07-29 | Robert W. Ratte |
| A closed system and method that includes a source of pressurizeable molten lead connected to a mold having a mold cavity therein with the mold maintainable at sufficiently low temperature so that a charge of molten lead located in the mold cavity solidifies to thereby form a solidified casting in the mold cavity. A housing having a runner, is maintainable at sufficiently high temperature to maintain the molten lead in a molten state so that the mold cavity can be refilled with a fresh charge molten lead when a solidified casting is removed therefrom without introducing air to the closed system. A shut-off valve, having an open position to allow a charge of molten lead to flow into the mold cavity and a closed position to prevent molten lead from flowing out of the runner as the molten lead in mold cavity solidifies with the shut-off valve configurable to intensify the pressure of the lead in the mold cavity. | ||||||
| 144 | Die casting of wrought aluminum alloys | US09962014 | 2001-09-24 | US20030056929A1 | 2003-03-27 | James T. Staley JR. |
| A method of making a wrought aluminum alloy component comprises die casting the wrought aluminum alloy in a die cavity to produce a die cast component and isostatically pressing the die cast component to promote closure of internal voids therein. | ||||||
| 145 | Die casting machine | US10078164 | 2002-02-20 | US20020112840A1 | 2002-08-22 | Shoukou Kubota |
| A die casting machine capable of reducing the pressure in a die cavity to a lower level such as a substantially perfect vacuum, having a movable die and a fixed die, a vacuum pump for reducing pressure in a cavity formed between the dies, and an injection apparatus for injecting and filling molten metal into the cavity with reduced pressure, at least one of the dies having an evacuation path connected with the vacuum pump and communicated with the cavity, a valve element for opening and shutting the evacuation path, and an electromagnetic driving means for making the valve element move linearly in the opening and shutting direction by electromagnetic force. | ||||||
| 146 | Apparatus and method of forming battery parts | US10106613 | 2002-03-26 | US20020096305A1 | 2002-07-25 | Robert W. Ratte |
| 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. In another method of forming a pressure cast battery part free of cracks a molten lead under pressure is flowed into a battery part cavity and the pressure of the molten lead is increased to sufficiently high pressure so that when the molten lead solidifies it forms a battery part fee of cracks and voids. | ||||||
| 147 | Apparatus and method of forming parts | US09321776 | 1999-05-27 | US06405786B1 | 2002-06-18 | Robert W. Ratte |
| A closed system and method that includes a source of pressurizeable molten lead connected to a mold having a mold cavity therein with the mold maintainable at sufficiently low temperature so that a charge of molten lead located in the mold cavity solidifies to thereby form a solidified casting in the mold cavity. A housing having a runner, is maintainable at sufficiently high temperature to maintain the molten lead in a molten state so that the mold cavity can be refilled with a fresh charge molten lead when a solidified casting is removed therefrom without introducing air to the closed system. A shut-off valve, having an open position to allow a charge of molten lead to flow into the mold cavity and a closed position to prevent molten lead from flowing out of the runner as the molten lead in mold cavity solidifies with the shut-off valve configurable to intensify the pressure of the lead in the mold cavity. | ||||||
| 148 | Process for controlling the amount of metal metered | US09649058 | 2000-08-29 | US06379609B1 | 2002-04-30 | Friedrich Georg Stummer |
| The invention relates to a process for controlling casting parameters and in particular to the control of the metering of the molten metal in a casting chamber of a vacuum die-casting machine. Measurement devices connected to a computer determine the volume and condition of the molten material. An evacuation device and a vacuum valve are controlled in the form of a control circuit. | ||||||
| 149 | Apparatus and method of forming battery parts | US09706376 | 2000-11-03 | US06363996B1 | 2002-04-02 | Robert W. Ratte |
| 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. In another method of forming a pressure cast battery part free of cracks a molten lead under pressure is flowed into a battery part cavity and the pressure of the molten lead is increased to sufficiently high pressure so that when the molten lead solidifies it forms a battery part free of cracks and voids. | ||||||
| 150 | Injector particularly for vacuum die-casting apparatus | US09878216 | 2001-06-12 | US20010052403A1 | 2001-12-20 | Graziano Mortari |
| An injector particularly for a vacuum die-casting apparatus, comprising an injector body provided with at least one first opening for injecting/aspirating a protective gas and at least one second opening for loading molten material, which are arranged in order of operation. The injector body is further provided with a chamber for containing material and for the sliding of a piston for pushing the material into a die. The injector also comprises elements for cleaning and lubricating the external surface of the piston which are arranged in order of operation on a corresponding supporting element which is separate from the injector body. | ||||||
| 151 | Method and apparatus for manufacturing die-castings | US895089 | 1997-07-16 | US06125911A | 2000-10-03 | Jurgen Wust; Reinhard Winkler; Miroslaw Plata |
| The apparatus includes a diecasting mold and evacuation elements for the controlled evacuation of a mold cavity. The evacuation elements includes a vacuum tank and a suction line interconnecting the vacuum tank and the diecasting mold. the suction line includes a first valve and a second valve which is coupled in parallel to the first valve. The valves are arranged so that a reference space is formed therebetween. The method for manufacturing die-castings includes evacuating a diecasting mold, filling the diecasting mold with casting material, removing the die-casting, forming a reference space in a portion of the suction line by closing the two valves which are coupled in parallel, measuring moisture, and pressure and temperature in the reference space, and controlling the apparatus in accordance with the measured values. | ||||||
| 152 | Process for manufacturing diecast parts | US737764 | 1996-11-18 | US6024158A | 2000-02-15 | Jean-Pierre Gabathuler; Ivan Gyongyos; Hans-Gunther Thurner; Jurgen Wust |
| Parts are diecast from a light metal alloy which in the molten state is fed under gravity into a casting chamber of a diecasting machine and whence forced by a plunger into a mould chamber which undergoes controlled evacuation in accordance with the position of a plunger. A parting compound is applied to at least one mold half and the application of a lubricant to the plunger. The light metal alloy consists of a primary alloy of invariable composition, with a limit placed on the proportions of Cu, Fe and Zn; the alloy undergoes smelting treatment, de-gassing and/or filtration before being introduced. The vacuum in the mould chamber is below 50 mbar when the molten alloy is introduced and the parting compound contains alkali halides and anti-corrosion additives. | ||||||
| 153 | Metal forming process | US789647 | 1997-01-29 | US5832982A | 1998-11-10 | Samuel B. Williams; Timothy A. Nielsen; James S. Prosser; William P. Schimmel |
| Methods for semisolid manufacturing of precision parts, turbine rotors for example, comprised of high melting point alloys are given. Generally, a semisolid/thixotropic process is operated under vacuum utilizing a removable mold. The process preferably comprises a vacuum chamber, an inductive heater to bring a high melting point alloy to a thixotropic phase, a supercooled mold comprised of a low melting point alloy or metal, and a plunger that accelerates and injects the high melting point alloy into the low melting point mold. As the formed part cools, the supercooled low melting point mold heats up to its melting point upon which separation from the formed part occurs. Supercooling of the removable mold permits the use of thixotropic methods for high melting point alloys. | ||||||
| 154 | Incorporating partially sintered preforms in metal matrix composites | US482389 | 1995-06-07 | US5775403A | 1998-07-07 | M. K. Premkumar; Ralph R. Sawtell; Frankie E. Phelps; James A. DerKacy; David I. Yun |
| A method of fabricating MMCs having high thermal conductivity coupled with coefficient of thermal expansion (CTE) values which approximates the CTE of ceramics and semi-conductor materials typically used in electronic packaging. The method comprises preparing a formed agglomeration of powder particles (preform); partially sintering the preform; placing the partially sintered preform into a forming chamber; infiltrating the preform with liquid-phase metal; and allowing the liquid-phase metal to solidify and form an MMC around and through the preform. In a preferred embodiment, the preform is constructed from silicon carbide, and the metal matrix is an aluminum-silicon alloy. | ||||||
| 155 | Apparatus and method for cold chamber die-casting of metal parts with reduced porosity | US238465 | 1994-05-05 | US5697422A | 1997-12-16 | Jamal Righi; James R. Fields; Eric D. Arndt |
| A vacuum die-casting machine has a sprue cavity with sufficient depth facing the shot cylinder that the shot cylinder piston can easily crush with a pressure of less than 1000 psi the thin cylindrical shell of solidified metal which develops into the biscuit, and continue to advance after the die cavity becomes fried with molten metal to inject additional molten metal into the die cavity to make up for shrinkage porosity as the cast part cools. The runner through which the molten metal passes from the sprue cavity into the die cavity has generally spherical reservoirs adjacent circular gates to further assure the supply of the additional molten metal to make up for shrinkage in the part. In addition, the piston can be oil cooled steel to delay formation of the biscuit. | ||||||
| 156 | Metal matrix composites containing electrical insulators | US444171 | 1995-05-18 | US5616421A | 1997-04-01 | Ralph R. Sawtell; Mosur K. Premkumar; David I. Yun |
| A method of fabricating a metal matrix composite containing electrically isolated areas and the MMC formed from the method. The method comprises: (a) providing a liquid pool of unreinforced aluminum alloy; (b) infiltrating the unreinforced aluminum alloy into a stack comprising upper and lower porous preforms and an electrical insulator material placed between the preforms; (c) solidifying the liquid-phase metal to form a metal matrix composite product that completely surrounds the stack; and (d) forming at least one groove in the solidified metal, the groove extending downward to the insulating substrate so as to electrically isolate at least one region on the surface of the metal matrix composite. | ||||||
| 157 | Method and apparatus for vacuum die casting | US271603 | 1994-07-07 | US5511605A | 1996-04-30 | Norihiro Iwamoto |
| A vacuum-controlling system for controlling the degree of vacuum in the vacuum system of a vacuum die-casting machine operates to: detect the degree of vacuum H at the instant of closure of the vacuum valve to the die mold cavity; compare the detected degree of vacuum H with a preset degree of vacuum Ho; correct a first position of the injection plunger for opening the vacuum valve by moving the first position in the advancing direction of the plunger by a specific distance in the case where H is higher than Ho; and correct the first position in the retracting direction of the plunger by a specific distance in the case where H is lower than Ho. By thus automatically correcting the position of the plunger for opening the vacuum valve to the optimum state, the formation of cavities or blowholes in the die-cast product is prevented, and at the same time, by maintaining the degree of vacuum in a specific state, the product quality is stabilized. | ||||||
| 158 | Apparatus and method for lubricating and cleaning out die-casting equipment | US122999 | 1993-09-17 | US5435373A | 1995-07-25 | Donald L. Drane; James R. Fields; Robert C. Wallace; Thomas J. Kasun; Robert E. Robinson |
| The fill chamber bore of a die-casting machine is lubricated and prepared for casting by inserting an elongated member into the die-end of the bore while spraying with lubricant. During withdrawal of the elongated member, a conical spray of gas directed toward the die-end drys the lubricant and sweeps vapor and flash, or solder, out of the die-end. The elongated member is preferably a flexible carrier which is guided between the bore and a path between the open die halves lateral to the bore. The lateral path is perferably defined by a tubular member supported by a vertical carriage mounted on a vertical mast for alignment of the flexible carrier with the fill chamber bore when the dies are open. The vertical mast can be mounted on a horizontal carriage moveable along a horizontal bore to preclude interference with normal operation of the die-casting machine. The flexible carrier can be housed in a arcuate chamber pivoted on the side of the fixed platen and swung between the open dies to align the flexible carrier with the fill chamber bore. | ||||||
| 159 | Die-casting process and equipment | US124387 | 1993-09-20 | US5370171A | 1994-12-06 | James R. Fields; Men G. Chu; Lawrence W. Cisko; C. Edward Eckert; Thomas R. Hornack; Marshall A. Klingensmith; Richard A. Manzini; M. K. Premkumar; Gerald D. Scott; Mohammad A. Zaidi |
| The die casting machine includes a trough containing a supply of molten metal and a feed tube extending into the supply of molten metal in the trough. A flow of molten metal is maintained in the trough past the feed tube independent of the transfer of molten metal through the feed tube. The die casting machine further includes a filtering system. | ||||||
| 160 | Fabrication of metal matrix composites by vacuum die casting | US682513 | 1991-04-08 | US5259436A | 1993-11-09 | David I. Yun; Ralph R. Sawtell; Warren H. Hunt; H. Robert Baumgartner; Eric T. Streicher; Michael F. Ehman |
| Metal matrix composites are manufactured in a vacuum die casting machine. Solid aggregate material, at least 65 volume percent, is placed in a die, the die is evacuated and heated, and molten metal is driven by a piston to infiltrate the solid aggregate material where it subsequently solidifies to form a metal matrix composite. | ||||||
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