| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 161 | Vacuum die casting process | US874648 | 1992-04-27 | US5219409A | 1993-06-15 | Dave L. Campbell; George R. Clark; Frank W. Kenik; Russell J. VanRens |
| The process calls for testing and monitoring the pressure levels in different parts of the die casting apparatus during a casting operation, including the die cavity itself and in positive and vacuum pressure lines. The process also includes process steps which cools a vacuum valve adjacent the die cavity and cleans the valve and lines during a casting operation. The process calls for aborting a casting operation at various time during the operation if certain measured parameters are not acceptable. | ||||||
| 162 | Die-casting process and equipment | US320140 | 1989-03-07 | US5076344A | 1991-12-31 | James R. Fields; Men G. Chu; Lawrence W. Cisko; C. Edward Eckert; George C. Full; Thomas R. Hornack; Thomas J. Kasun; Jerri F. McMichael; Richard A. Manzini; Janel M. Miller; M. K. Premkumar; Thomas J. Rodjom; Gerald D. Scott; William G. Truckner; Robert C. Wallace; Mohammad A. Zaidi |
| This invention provides improved casting processes, equipment, and products. The invention is especially advantageous for die casting. | ||||||
| 163 | Vertical injection apparatus for die casting machine | US219737 | 1988-07-15 | US4871010A | 1989-10-03 | Sadayuki Dannoura |
| A vertical injection apparatus for a die casting machine is disclosed. The setting is made such that a timing for vacuum evacuation applied to a portion into which air enters is suitably earlier than that for vacuum evacuation applied to a die cavity. Thus, this allows a solidification layer tightly formed on the end surface of a plunger tip to prevent air from entering into the die cavity, making it possible to desirably carry out injection and to remarkably improve quality of casting products. By improving the structure for holding a vacuum evacuating tube, this apparatus can facilitate repairing word required when the evacuating tube is clogged with hot molten metal. | ||||||
| 164 | Die-casting method and apparatus | US736762 | 1985-05-22 | US4586560A | 1986-05-06 | Seizi Ikeya; Tsuyoshi Tabuchi |
| A die-casting apparatus is used to carry out a die-casting method in which an injection plunger is moved forwardly at a lower speed and then is temporarily stopped at a forward stroke intermediate position in which a space defined by the injection plunger and an injection sleeve is substantially filled with an amount of molten metal. Then, evacuation of a product cavity and the injection sleeve is commenced and, after the lapse of a predetermined time period, the injection plunger is again moved forwardly at a higher speed to inject the molten metal from the injection sleeve into the product cavity. Compared with the prior art, the method provides an increased evacuation time period and assures a reduction in the volume to be evacuated. In addition, the higher injection stroke reduces possibility that air and gases are trapped in the molten metal to provide die-cast products of a high quality. | ||||||
| 165 | Gas-venting arrangement incorporated with a mold | US322364 | 1981-11-17 | US4489771A | 1984-12-25 | Takahiko Takeshima; Tadashi Ueki; Motozo Kawashima; Thuneo Ueno; Masayuki Nishimoto |
| A gas-venting valve includes a sliding valve and either a fixed or movable valve chamber. The valve is closed by impingement of molten metal or melt flowing out of a cavity defined by the mold, in such a manner that the valve is forced to move relative to the valve chamber from a first position to a second position. The invention further includes a device for urging the valve to move relative to the valve chamber from the first position to the second position; a device for restraining the valve at the first position and preventing it from moving toward the second position, against the force of the urging device, until a part of the melt impinges against the valve; and a device for actuating the valve to return from the second position to the first position against the force of the urging device. | ||||||
| 166 | Diecasting method for producing cast pieces which are low in gas, pores and oxides, as well as diecasting machine for implementing the method | US317617 | 1981-11-03 | US4476911A | 1984-10-16 | Edgar Lossack; Jochen Spriestersbach; Josef Baur; Wilfried Schwab |
| A diecasting process for producing cast pieces for metals or their alloys by means of a horizontal cold chamber diecasting machine. The diecasting machine includes a diecasting mold held under a vacuum, a fill chamber coupled to the diecasting mold, a holding furnace containing metal melt, a suction pipe partially immersed in the holding furnace and coupled to the fill chamber, means for transporting metal melt from the holding furnace through the suction pipe into the fill chamber under a vacuum, and means for moving the metal melt from the fill chamber into the diecasting mold. During the dosaging phase when the fill chamber is filled with metal melt, gases and lubricant vapors are developed upon entry of the melt into the fill chamber. The process includes the steps of maintaining the vacuum in the fill chamber during the dosaging phase until the gases and lubricant vapors so developed have been substantially extracted and maintaining the vacuum in the fill chamber to its maximum extent until the diecasting mold is completely filled with the metal melt. | ||||||
| 167 | Vacuum die casting machine | US343961 | 1982-01-29 | US4463793A | 1984-08-07 | Hans Thurner |
| A method and apparatus for casting molten metal in a die casting machine having matching die assemblies movable between open and closed positions, a plunger for injecting molten metal into the die cavity, a vacuum system for evacuating the die cavity during injection of molten metal and a vacuum control valve for opening and closing the exhaust passage through which the air is evacuated. A fluid cylinder is mounted on one die assembly with its piston rod coupled to the valve rod of the vacuum control valve. The fluid cylinder has a solenoid-operated control valve actuated by an electric switch operated by movement of the molten metal injection piston so that the vacuum control valve begins to close at a predetermined point during the injection stroke. The injection plunger also actuates a timer at the same time it actuates the solenoid-operated control valve. As the vacuum control valve approaches its closed position, it actuates another switch that initiates the final injection stroke of the injection piston. If the latter switch is not actuated by the time the timer times out, the injection plunger is retracted before injection of molten metal is completed, so that no molten metal can enter the vacuum passages due to incomplete closure of the vacuum valve. | ||||||
| 168 | Installation for die-casting of metal blanks | US864757 | 1977-12-27 | US4154286A | 1979-05-15 | Sergei G. Glazunov; Alexei M. Khromov; Vasily V. Merkulov; Igor B. Krjuchkov; Nikolai E. Klimov; Dmitry A. Filippov |
| The installation comprises a pressure tight casing with vacuum melting and casting chambers communicating with each other via a pressing chamber. The vacuum melting chamber accommodates an electrode holder arranged above a melting pot. Located under the melting pot is a pouring device with funnels, one of which is inserted into a hole in the shell of the pressing chamber. The vacuum melting chamber incorporates an appliance for cleaning the used funnels and a mechanism for moving the funnels. The pressing chamber communicates with the pressmould. One half of the pressmold is secured on an immovable vertical plate and the other half is mounted on a movable vertical plate. The movable vertical plate travels over horizontal guides. | ||||||
| 169 | Shut-off mechanism for the vent passage of a casting mold | US597352 | 1975-07-21 | US3991971A | 1976-11-16 | Johannes Drake |
| A device for regulating the flow of moldable material from a mold which has two mold parts which are separable along a parting plane or surface with a vent passage defined along the plane which extends from the interior of the mold to atmosphere or to a venting apparatus such as a venting pump. One of the mold parts is provided with a recess adjacent the mold separating plane which includes a block having a vent continuation passage which communicates with the vent passage. The vent continuation passage includes a first elongated vent continuation passage portion which communicates with the lower end of a piston bore for a regulating piston which is displaceable in the bore against biasing means by an outflow of the moldable material. In addition the vent continuation passage includes a second vent continuation passage portion which extends between the first vent continuation passage portion and it communicates at one end of a transverse valve bore defined through the piston when the piston is in an initial position in which no moldable material enters into the first vent continuation passage portion. The other end of the piston transverse valve bore continues up through the block to an outer vent passage. The second vent continuation passage may comprise one or two passage portions as well as additional mold material flow areas to increase the area in which the moldable material may flow. Upon the entrance of moldable material to the base of the piston it is displaced so as to close the valve bore in the piston by displacing it from communicaton between the second vent continuation passage and the outer vent passage. | ||||||
| 170 | Injection gate system | US3779304D | 1971-07-13 | US3779304A | 1973-12-18 | MIKI I |
| In an oxygen flush presure injection die casting system, the molten metal is introduced into the die cavity in a turbulent condition to achieve efficient mixing with the oxygen gas in such cavity and thus promote reaction of the metal with the gas and minimize the presence of blow holes in the cast product.
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| 171 | Oxygen flushing pressure die-casting method | US3744546D | 1971-08-17 | US3744546A | 1973-07-10 | MIKI I; ICHIKAWA Y |
| This disclosure relates to an oxygen flush pressure die-casting method in which the production of shrinkage holes of large caliber appearing within the obtained casting can be prevented and the strength of the product can be remarkably improved by adding to the oxygen gas a minor amount of an inert gas, such as about 1-10 vol percent of the total volume of the mixture.
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| 172 | Mold for pressure injected material vented through ejector pin guides | US3555620D | 1967-10-17 | US3555620A | 1971-01-19 | BUCY HARRY R |
| A MOLD FOR PRESSURE INJECTED MATERIALS GENERALLY SIMILAR TO THE MOLD DISCLOSED IN THE CO-PENDING APPLICATION OF APPLICANT, SER. NO. 496,368 FILED OCT. 15, 1965, NOW PAT. NO. 3,357,057, GRANTED DEC. 2, 1967, IN WHICH THE MOLD CAVITY OR CAVITIES IS MAINTAINED IN AN EVACUATED CONDITION WHILE BEING FILLED WITH THE INJECTED MOLTEN MATERIAL, THE MOLD OF THE PRESENT INVENTION BEING FURTHER CHARACTERIZED BY ACHIEVEMENT OF CAVITY AND OTHER EVACUATING BY MEANS DISPOSED REMOTE FROM THE MOLD AND BY AN ADDED UTILITY OF THE EJECTOR PIN GUIDING BORES AS A CAVITY EVACUATING INSTRUMENTALITY.
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| 173 | Mold for pressure injected molten material having cavity with peripheral vent | US3555619D | 1967-10-17 | US3555619A | 1971-01-19 | BUCY HARRY R |
| A SEPARABLE MOLD FOR PRESSURE INJECTED MOLTEN MATERIAL CHARACTERIZED BY THE FACT THAT THE MEETING FACES OF THE MOLD HALVES ADJACENT TO THE PRIPHERY THEREOF ARE UNINTERRUPTED AND BY THE FACT THAT EACH CAVITY IN THE MOLD IS SEPARATELY VENTED BY MEANS INCLUDING A GROOVE IN COMMUNICATION WITH ATMOSPHERE WHICH SUBSTANTIALLY PERIPHERALLY SURROUNDS THE CAVITY AND IS CONNECTED TO THE CAVITY BY A LONGITUDINALLY CO-EXTENSIVE NARROW SPACE BETWEEN THE GROOVE AND THE CAVITY OF SUCH LIMITED DEPTH THAT ONLY THE AIR AND GAS DISPLACED BY THE ENTERING MATERIAL CAN FLOW FROM THE CAVITY INTO THE GROOVE AND THENCE TO ATMOSPHERE.
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| 174 | Method of casting employing self-generated vacuum | US43758165 | 1965-03-05 | US3364976A | 1968-01-23 | REDING JOHN N; BOTHWELL MARVIN R |
| 175 | Slow pouring and casting system for ferrous and other metals | US54799166 | 1966-05-05 | US3352351A | 1967-11-14 | WILHELM SICKBERT ADOLF HEINRIC |
| 176 | Slow pouring and casting system for ferrous and other metals | US33173163 | 1963-12-19 | US3268958A | 1966-08-30 | WILHELM SICKBERT ADOLF HEINRIC |
| 177 | Vertical vacuum diecasting machine | US19184962 | 1962-05-02 | US3209416A | 1965-10-05 | MORTON GLEN R |
| 178 | Method of, and apparatus for, die casting metals | US39812664 | 1964-09-21 | US3201836A | 1965-08-24 | GUSTAV NYSELIUS |
| 179 | Vacuum die casting of molten metals | US17328762 | 1962-02-14 | US3178782A | 1965-04-20 | BENNETT FOSTER C |
| 180 | Apparatus for vacuum die casting | US72095258 | 1958-03-12 | US3106755A | 1963-10-15 | MOORE JESSE C |
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