Inelastic Compression Means For Confined Metal Patents (Class 164/319)
  • Patent number: 11007567
    Abstract: A die casting machine is provided with a movable platen for holding a movable mold, a stationary platen for holding a stationary mold, and tie bars inserted into insertion holes provided in the movable platen and the stationary platen, the movable platen being arranged so as to be capable of advancing to and retreating from the fixed platen along the tie bars. A hollow section is provided in at least one of the movable platen and the stationary platen.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: May 18, 2021
    Assignee: Ube Machinery Corporation, Ltd.
    Inventor: Naoki Ishibashi
  • Patent number: 9914252
    Abstract: Technique to provide a molding die which can easily release a minute optical element in a state of favorable surface accuracy, while bending or rupture of a gate portion attached to the optical element is prevented. By making a first outer circumferential transfer surface 21A of a fixed die 20 and a first gate-forming surface 31A flush with each other, a notch shape is not formed on a portion M1 connecting an outer circumferential portion FL on the fixed die 20 side and a gate portion GP. Furthermore, by pushing out the runner portion RP at the same angle as a taper angle ? of a side-surface transfer surface 23A on a second gate-forming surface 32A side, bending deformation or the like of the gate portion GP which can occur when being pushed out to a direction perpendicular to a mold mating surface PL1 can be prevented.
    Type: Grant
    Filed: September 5, 2013
    Date of Patent: March 13, 2018
    Assignee: Konica Minolta, Inc.
    Inventors: Shinichiro Hara, Dai Akutsu, Hajime Mori
  • Patent number: 8807199
    Abstract: A method of pressure forming a metal matrix composite (MMC), comprises: placing a fiber preform (not shown) into a die cavity (14) defined by a split die (12); introducing molten metal into the die cavity (14) through a sprue (16) to envelope the fiber preform; sealing the sprue (16); applying pressure direct to molten metal in the die cavity (14) with a mechanical compaction piston (18) to encourage infiltration of the fiber preform during solidification.
    Type: Grant
    Filed: August 12, 2004
    Date of Patent: August 19, 2014
    Assignee: Composite Metal Technology Ltd.
    Inventor: Roger Stanley Bushby
  • Publication number: 20140054000
    Abstract: An apparatus for press casting includes a casting mold formed of a fixed mold and a first moving mold operable to move relative to the fixed mold. The apparatus further includes a second moving mold operable to move relative to the first moving mold. A mold cavity, which forms a cast product, is configured by the fixed mold and the second moving mold. When the first moving mold is moved to a first predetermined position, a molten metal passage and a gas exhaust port, which communicate with the mold cavity, are formed at positions outside the mold cavity. A communication between the mold cavity and the molten metal passage, and the gas exhaust port is cut off by the second moving mold when the second moving mold is moved to a second predetermined position while the first moving mold is maintained at the first predetermined position thereof.
    Type: Application
    Filed: August 16, 2013
    Publication date: February 27, 2014
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Takunori KITAMURA, Hiroomi YANAGITA
  • Publication number: 20120018112
    Abstract: A method of forming a liquid-forged article. The method comprises introducing a melt into a die cavity; moving a punch relative to the die cavity such that the melt enters at least one high aspect ratio cavity in the punch and air is released via at least one air vent insert in the punch; and exerting a forming pressure on the melt while the melt solidifies in the high aspect ratio cavity.
    Type: Application
    Filed: March 9, 2010
    Publication date: January 26, 2012
    Inventors: Beng Wah Chua, Meng Kwong Ho, Raymond Ong, Su Yin Lim, Chun Wei Su
  • Publication number: 20110268922
    Abstract: Disclosed are a bonded product, and a manufacturing method and manufacturing device therefor. To obtain a bonded product formed of a solidified material of a molten metal which has been poured into a forming mold with a workpiece, all or part of which is already held therein, or formed of a semi-solidified slurry which is contained in the forming mold together with the workpiece, the semi-solidified slurry or the molten metal is relatively made to flow on the end faces of the workpiece while friction sufficient to break the passive state existing at the surface of the molten metal or the semi-solidified slurry is generated between the workpiece and the semi-solidified slurry or the molten metal.
    Type: Application
    Filed: November 20, 2009
    Publication date: November 3, 2011
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Katsuya Matsumoto, Sumitomo Watanabe, Mitsugu Kaneko, Toshihiro Murakawa, Takahiro Morita
  • Publication number: 20110053368
    Abstract: An apparatus and a process for the manufacture of a solder-bump adhered wafer substrate for use in the semiconductor industry, comprising one or more of the following steps including: arranging a first compressive member and a second compressive member in an opposed, compressibly displaceable, spaced-apart relationship, with a pattern plate disposed therebetween with the pattern plate having a plurality of aligned through-holes arranged thereon; filling the through-holes with a molten solder; compressing the solder and the pattern plate between the first and second opposed compressive members to compact the solder therein and cleans the pattern plate of excess solder; chilling the pattern plate to solidify the molten solder in the through-holes; and removing the pattern plate from the spaced-apart compressive members to produce a wafer with solder bumps thereon.
    Type: Application
    Filed: December 14, 2009
    Publication date: March 3, 2011
    Inventors: Chunghsin Lee, Jian Zhang
  • Publication number: 20090074603
    Abstract: A method for fabricating a magnesium-based composite material, the method includes the steps of: (a) providing a large amount of magnesium-based powder and a large amount of nanoscale reinforcements; (b) uniformly mixing the magnesium-based powder and the nanoscale reinforcements to form a mixture; and (c) compacting the mixture at a high velocity in a protective gas to achieve the magnesium-based composite material. High velocity compaction equipment for fabricating the magnesium-based composite material includes a sealing chamber, a gas pumping device, a mold, and a hammer. The gas pumping device is connected to the sealing chamber. The mold is disposed in the sealing chamber with an aperture formed on the top thereof. The hammer is disposed in the sealing chamber and above the mold, and moving along longitudinal thereof at a controllable ramming speed.
    Type: Application
    Filed: April 9, 2008
    Publication date: March 19, 2009
    Applicants: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Kam-Shau Chan, Cheng-Shi Chen, Qing-Chun Du, Wen-Zhen Li
  • Patent number: 7370687
    Abstract: A molding machine able to stably detect an abnormality of a squeeze pin, for example, a die cast machine having a squeeze pin able to apply pressure to a melt of a cavity repeatedly performing a molding cycle including a pressing process making the squeeze pin advance and applying pressure to the melt of the cavity in a state where the melt is filled in the cavity and a spray process making the squeeze pin advance and performing at least one of lubrication and cooling of the squeeze pin in the state where the melt is not filled in the cavity, and, in the spray process, detecting a stroke of the squeeze pin and detecting an abnormality of the squeeze pin based on a comparison of the detection result about the stroke and a predetermined reference value.
    Type: Grant
    Filed: February 20, 2007
    Date of Patent: May 13, 2008
    Assignee: Toshiba Kikai Kabushiki Kaisha
    Inventors: Yukio Mizota, Shunichiro Ito
  • Publication number: 20070193712
    Abstract: A molding machine able to stably detect an abnormality of a squeeze pin, for example, a die cast machine having a squeeze pin able to apply pressure to a melt of a cavity repeatedly performing a molding cycle including a pressing process making the squeeze pin advance and applying pressure to the melt of the cavity in a state where the melt is filled in the cavity and a spray process making the squeeze pin advance and performing at least one of lubrication and cooling of the squeeze pin in the state where the melt is not filled in the cavity, and, in the spray process, detecting a stroke of the squeeze pin and detecting an abnormality of the squeeze pin based on a comparison of the detection result about the stroke and a predetermined reference value.
    Type: Application
    Filed: February 20, 2007
    Publication date: August 23, 2007
    Applicant: TOSHIBA KIKAI KABUSHIKI KAISHA
    Inventors: YUKIO MIZOTA, Shunichiro Ito
  • Patent number: 7111664
    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.
    Type: Grant
    Filed: March 18, 2005
    Date of Patent: September 26, 2006
    Assignee: Toshihara Kanagata Kogyo Co., Ltd.
    Inventors: Akira Itoh, Kiyoshi Sawada
  • Patent number: 7028381
    Abstract: A method for producing a cast/sheet-metal composite body, comprising the following steps: provide a casting mold (12), place at least one sheet-metal part (11) in the casting mold (12), produce a cast part (2) interconnected with the at least one sheet-metal part (11), and apply pressure to the at least one sheet-metal part (11) to form a hollow space (8).
    Type: Grant
    Filed: August 17, 2001
    Date of Patent: April 18, 2006
    Assignee: Robert Bosch GmbH
    Inventor: Gerhard Pflueger
  • Patent number: 7011137
    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.
    Type: Grant
    Filed: April 14, 2003
    Date of Patent: March 14, 2006
    Assignee: Toshihara Kanagata Kogyo Co., LTD
    Inventor: Akira Itoh
  • Patent number: 6810940
    Abstract: It is necessary for the stroke of squeeze pin to be controlled so as to reach a defined target stroke position or zone during each shot operation of a die-casting machine. To achieve such control of squeeze pin, controlled variables T, Q or P are set in a trial molding process. The setting operation of the controlled variable is executed in a short time automatically. In case of adopting flow rate Q supplied to the squeeze cylinder as a controlled variable, the initial setting value Q1 is defined as 50% with conversion of opening degree of a flow control valve. Then, if the stroke of the pin is out of target, flow rate Q2 is set, which is defined as 75% corresponding to a intermediate value between the maximum degree of opening 100% and 50% at Q1. In a similar way, flow rates Q3, Q4, Q5 are set, namely, each Q3, Q4, Q5 is defined as the intermediate value between controlled variables set in consecutive two shots ahead. In case of Q5 the detected stroke of the squeeze pin is within the target stroke zone.
    Type: Grant
    Filed: May 13, 2002
    Date of Patent: November 2, 2004
    Assignee: Toshiba Kikai Kabushiki Kaisha
    Inventors: Makoto Tsuji, Toshiaki Nakano, Toshioki Toyoshima
  • Publication number: 20040211544
    Abstract: The present invention provides a casting apparatus 10A including a mold 12 having a molten metal inlet 21 at a first end portion of a partition wall 12a, and an open/close plug 13 for opening and closing the inlet 21 of the mold 12, the plug 13 being brought into contact with or detached from an inlet-defining wall, in which molten metal 1′ is teemed into the mold 12 when the plug 13 is detached from the inlet-defining wall, and teeming of the molten metal 1′ into the mold 12 is stopped when the plug 13 is brought into contact with the inlet-defining wall, wherein a member 20 having the inlet-defining wall is separable from the mold 12, and the member 20 having the inlet-defining wall is removably provided on the mold 12.
    Type: Application
    Filed: April 30, 2002
    Publication date: October 28, 2004
    Inventors: Shigeru Yanagimoto, Masashi Fukuda, Tomoo Uchida, Kunio Hirano
  • Publication number: 20040069436
    Abstract: An apparatus and method for pressure casting a battery part wherein an extendible piston includes sidewalls for shutting off the supply of molten lead and an impact surface that extends in a side-to-side condition to form an end surface of a battery part cavity so that when the extendible piston is brought into an intensifying condition the extendible piston shuts off further supply of molten metal while a heat source maintains the lead in a molten state as the impact surface of the piston forms a side-to-side mold cavity surface to complete the mold cavity surface thereby eliminating unevenness in the surface of the finished battery part by generating a force with the extendible piston which is sufficient to form a battery part so that upon removal from the mold the batter part is substantially free of tears and cracks as well as surface irregularities.
    Type: Application
    Filed: October 9, 2003
    Publication date: April 15, 2004
    Inventor: Robert W. Ratte
  • Patent number: 6701998
    Abstract: An apparatus and method for pressure casting a battery part wherein an extendible piston includes sidewalls for shutting off the supply of molten lead and an impact surface that extends in a side-to-side condition to form an end surface of a battery part cavity so that when the extendible piston is brought into an intensifying condition the extendible piston shuts off further supply of molten metal while a heat source maintains the lead in a molten state as the impact surface of the piston forms a side-to-side mold cavity surface to complete the mold cavity surface thereby eliminating unevenness in the surface of the finished battery part by generating a force with the extendible piston which is sufficient to form a battery part so that upon removal from the mold the batter part is substantially free of tears and cracks as well as surface irregularities.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: March 9, 2004
    Assignee: Water Gremlin Company
    Inventor: Robert W. Ratte
  • Patent number: 6684935
    Abstract: An apparatus and method for pressure casting a battery part wherein at least one of the mold members forming the surfaces of an internal battery part cavity are displaced with respect to one another to reduce the volume of the mold cavity formed between the two parts to thereby intensify the pressure sufficiently high pressure so as to inhibit the formation of cracks and tears in a cast part.
    Type: Grant
    Filed: July 23, 2002
    Date of Patent: February 3, 2004
    Assignee: Water Gremlin Company
    Inventor: Robert W. Ratte
  • Patent number: 6598658
    Abstract: 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.
    Type: Grant
    Filed: May 16, 2002
    Date of Patent: July 29, 2003
    Assignee: Water Gremlin Company
    Inventor: Robert W. Ratte
  • Patent number: 6581670
    Abstract: A pressing-in unit for a hot-chamber pressure diecasting machine permits an electro-mechanical drive for the casting plunger. In order to absorb the moments of inertia of the drive which occur during the switch-over of the casting plunger drive from the mold filling phase to the after-pressure phase, a spring element in the form of a plastic component or a liquid spring is inserted between the casting plunger and the pusher rod moved by the electric drive, which spring element is compressed by the additional path which the pusher rod still covers after the braking of the motor. The extent of the compression is selected such that the resulting axial force which is exercised by the plastic component or by the liquid spring is sufficient for causing the desired after-pressure in the molten metal.
    Type: Grant
    Filed: June 7, 2001
    Date of Patent: June 24, 2003
    Assignee: Oskar Frech GmbH & Co.
    Inventors: Roland Fink, Norbert Erhard, Herbert Noschilla, Bruno Stillhard, Ronald Siegrist
  • Publication number: 20030034144
    Abstract: An apparatus and method for pressure casting a battery part wherein at least one of the mold members forming the surfaces of an internal battery part cavity are displaced with respect to one another to reduce the volume of the mold cavity formed between the two parts to thereby intensify the pressure sufficiently high pressure so as to inhibit the formation of cracks and tears in a cast part.
    Type: Application
    Filed: July 23, 2002
    Publication date: February 20, 2003
    Applicant: xc
    Inventor: Robert W. Ratte
  • Patent number: 6513570
    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.
    Type: Grant
    Filed: September 17, 2001
    Date of Patent: February 4, 2003
    Assignee: Water Gremlin Company
    Inventor: Robert W. Ratte
  • Patent number: 6460603
    Abstract: An apparatus for uphill low pressure casting of metals in split sand moulds and having a sprue in one of the two moulds, to which can be connected the casting tube of a melt container and which is connected to the lowest area of the mould cavity, and having a sealing plug integrated into the mould and which after the filling of the mould cavity can be brought into the closed position by means of an external drive engaging in the mould, including a seal which does impairing casting quality and moulding sand preparation. Between the sprue and the mould cavity is provided a casting channel connecting the sprue and the mould cavity. The sealing plug is constructed as a sand mould body and in a shaped-in guide of the mould is displaceable between an open position and a closed position, and seals a casting channel and a metallostatic pressure of the molten metal in the mould acts against the guide on the sealing plug.
    Type: Grant
    Filed: September 22, 1999
    Date of Patent: October 8, 2002
    Assignee: Georg Fischer Disa AG
    Inventors: Norbert Damm, Herbert Zulauf
  • Patent number: 6460604
    Abstract: An apparatus for uphill low pressure casting of molten metal in sand molds conveyed in synchronized manner with a casting station located at the conveyor, a gas pressure holding furnace containing the molten metal and located at the casting station with a rising casting tube connectable to the sand molds has a device for refilling the holding furnace with molten metal. To permit a rapid casting cycle and high casting capacities, the refilling device has at least one pressure-tight melt container and a filling tube located in the holding furnace with a seal positioned outside the same. The melt container is couplable in pressure-tight manner by means of its outlet to the holding furnace filling tube. The holding furnace is connected to the melt container by means of a pneumatic pressure compensating line.
    Type: Grant
    Filed: October 4, 1999
    Date of Patent: October 8, 2002
    Assignee: Georg Fischer DISA AG
    Inventors: Norbert Damm, Herbert Zulauf
  • Publication number: 20020104639
    Abstract: Method and apparatus for casting of molten metallic material wherein the metallic material is introduced into a mold and a pressure cap then is clamped on the mold by a cam/cam follower mechanism to form a seal such that pressurizing gas can be introduced into the mold on the molten metallic material therein. The pressure cap includes an inlet for pressurizing gas, which is introduced on the molten metallic material in the mold after the pressure cap is sealed thereon. Application of gas pressure on the molten metallic material in the mold improves filling of mold with the molten material and reduces or eliminates non-fill voids in the solidified casting.
    Type: Application
    Filed: January 9, 2001
    Publication date: August 8, 2002
    Inventor: Calvin L. Kroes
  • Publication number: 20020096305
    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.
    Type: Application
    Filed: March 26, 2002
    Publication date: July 25, 2002
    Applicant: Water Gremlin Company
    Inventor: Robert W. Ratte
  • Patent number: 6405786
    Abstract: 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.
    Type: Grant
    Filed: May 27, 1999
    Date of Patent: June 18, 2002
    Assignee: Water Gremlin Company
    Inventor: Robert W. Ratte
  • Patent number: 6363996
    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.
    Type: Grant
    Filed: November 3, 2000
    Date of Patent: April 2, 2002
    Inventor: Robert W. Ratte
  • Publication number: 20020011323
    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.
    Type: Application
    Filed: September 17, 2001
    Publication date: January 31, 2002
    Applicant: Water Gremlin Company
    Inventor: Robert W. Ratte
  • Publication number: 20010052374
    Abstract: A metal mold for manufacturing amorphous alloy. A metal mold is composed of a lower mold having a portion for fusing metal material and a cavity portion, and an upper mold working with the lower mold which presses molten metal in the portion for fusing metal material and pours the molten metal into the cavity portion to mold. And, surface roughness of a part of or all of an inner surface of the metal mold is arranged to be more than 12S in JIS indication.
    Type: Application
    Filed: June 12, 2001
    Publication date: December 20, 2001
    Applicant: Sumitomo Rubber Industries, Ltd.
    Inventors: Masahide Onuki, Akihisa Inoue, Hisashi Kakiuchi
  • Patent number: 6267171
    Abstract: A metal mold for manufacturing amorphous alloy. A metal mold is composed of a lower mold having a portion for fusing metal material and a cavity portion, and an upper mold working with the lower mold which presses molten metal in the portion for fusing metal material and pours the molten metal into the cavity portion to mold. And, surface roughness of a part of or all of an inner surface of the metal mold is arranged to be more than 12 S in JIS indication.
    Type: Grant
    Filed: December 8, 1998
    Date of Patent: July 31, 2001
    Assignees: Sumitomo Rubber Industries, Ltd.
    Inventors: Masahide Onuki, Akihisa Inoue, Hisashi Kakiuchi
  • Patent number: 6253829
    Abstract: A process for manufacturing a heat sink, in which a plate-shaped base portion is formed by the diecasting method integrally with the one-end portions of a plurality of fins arrayed at a constant pitch and in parallel with each other.
    Type: Grant
    Filed: April 19, 2000
    Date of Patent: July 3, 2001
    Assignee: Fujikura Ltd.
    Inventors: Koichi Mashiko, Masataka Mochizuki, Kazuhiko Goto, Yuji Saito, Yoshihiro Nagaki
  • Patent number: 6202733
    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.
    Type: Grant
    Filed: December 10, 1998
    Date of Patent: March 20, 2001
    Inventor: Robert W. Ratte
  • Patent number: 5957191
    Abstract: A casting method and apparatus using a resin core wherein a portion of a wall of the resin core that receives a greater heat and/or load than other portions of the wall of the resin core, is increased in thickness. As a result, even if the resin core receives more heat and/or load in places, a local deformation or breakage of the resin core is effectively prevented.
    Type: Grant
    Filed: September 4, 1996
    Date of Patent: September 28, 1999
    Assignees: Toyota Jidosha Kabushiki Kaisha, Aisin Seiki Kabushiki Kaisha
    Inventors: Masamichi Okada, Tatsuhiko Sawamura, Norio Hayashi, Takayuki Ito
  • Patent number: 5908065
    Abstract: Squeeze casting of high integrity, near net shape castings is performed in a mould cavity defined by cooperating die parts which are movable with respect to each other and have a separation distance which is selected to define a predetermined cavity volume for the cast article. A conduit has a first end connected to an entrance in the lower die part of the mould cavity and a second end connected to a receptacle which contains molten metal. Molten metal is transferred upwardly from the receptacle through the conduit to fill or substantially fill the mould cavity. The entrance to the mould cavity is sealed, and pressure is applied on the die parts to further reduce the cavity volume during solidification of the metal in the mould cavity.
    Type: Grant
    Filed: September 26, 1997
    Date of Patent: June 1, 1999
    Assignee: Papervision Limited
    Inventor: Geoffrey Allan Chadwick
  • Patent number: 5906235
    Abstract: A pressurized squeeze casting apparatus and method for casting articles includes densifying means for mechanically applying force to a die assembly to compress and densify the molten metal material into a solid article having a near net shape. A shutoff member is provided to seal the interior cavity at the juncture of the runner and the cavity after the cavity is filled with molten metallic material and prior to densification. A low pressure furnace provides a supply of molten metallic material. The outlet from the furnace is biased into engagement with the runner by the gas pressure in the low pressure furnace to ensure a fluid tight connection between the furnace and the runner.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: May 25, 1999
    Inventors: Robert Anthony Thomas, deceased, by Margaretanne Thomas, legal representative, James B. Thomas, Roger Hale
  • Patent number: 5887643
    Abstract: A rotor core (12) of a squirrel-cage rotor of an induction motor is housed in a recess (14) of a mold (18) of a conductor casting apparatus (10). A composite cylinder device (68) is fixed on the upper side of the mold (18) or on the side remoter from the pouring gate thereof, and the rotor core 12 is held in a predetermined position in the recess 14 by one piston (70). The other piston (72) locally pressurizes a molten metal that fills an end-connector ring cavity (66) defined between the rotor core (12) and the recess (14) on the side remoter from the pouring gate.
    Type: Grant
    Filed: January 17, 1997
    Date of Patent: March 30, 1999
    Assignee: Fanuc Ltd
    Inventors: Kosei Nakamura, Yukio Katsuzawa, Minoru Kasama, Yasuyuki Nakazawa
  • Patent number: 5887642
    Abstract: A pressurized squeeze casting apparatus and method for casting articles includes densifying means for mechanically applying force to a die assembly to compress and densify the molten metal material into a solid article having a near net shape. A shutoff member is provided to seal the interior cavity at the juncture of the runner and the cavity after the cavity is filled with molten metallic material and prior to densification. A low pressure furnace provides a supply of molten metallic material. The outlet from the furnace is biased into engagement with the runner by the gas pressure in the low pressure furnace to ensure a fluid tight connection between the furnace and the runner.
    Type: Grant
    Filed: July 14, 1998
    Date of Patent: March 30, 1999
    Inventors: Robert Anthony Thomas, deceased, by James B. Thomas, executor, Roger Hale
  • Patent number: 5839497
    Abstract: An interior cooling inner plunger is caused to project from an outer plunger after casting. Alternatively, during casting, while it projects from the outer plunger, the inner plunger is inserted into a frustoconical gate. Subsequently, a pressure pin is moved downward from a movable mold side to a portion near a gate portion. When a melt solidifies, a casting sleeve and a casting plunger are moved downward, and a pressure pin is further moved downward to cut apart a biscuit from a mold product. An excellent product is produced and the cycle time is shortened by a good melt pushing operation.
    Type: Grant
    Filed: November 13, 1997
    Date of Patent: November 24, 1998
    Assignee: U-Mold Co., Ltd.
    Inventors: Kiyoshi Fujino, Minoru Okamura
  • Patent number: 5730205
    Abstract: A die assembly for squeeze casting an article includes a two-piece first die section including a densifying die member and a base die member and a second die section. The first and second die sections define a die cavity therebetween having the shape of an article to be cast. The die sections are movable between an open position and a closed position in which the die cavity can be filled with an accurately controlled volume of molten material. The densifying die member is movable relative to the base die member from a first position to a densifying position in which the densifying die member is spaced apart from the base die member to accurately reduce the volume of the die cavity when the first and second die sections are in their closed position and the die cavity is filled with molten material.
    Type: Grant
    Filed: July 15, 1996
    Date of Patent: March 24, 1998
    Inventors: Robert Anthony Thomas, James B. Thomas
  • Patent number: 5697422
    Abstract: 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.
    Type: Grant
    Filed: May 5, 1994
    Date of Patent: December 16, 1997
    Assignee: Aluminum Company of America
    Inventors: Jamal Righi, James R. Fields, Eric D. Arndt
  • Patent number: 5638889
    Abstract: The present invention is to provide a semi-molten metal molding apparatus with a die including a die hole and a cavity, and a punch movable into the die hole, in which the die hole is opened downwardly, and the punch is set below the die hole in such a manner that it is movable into the die hole. According to the present invention, the cavity is filled with a part of the material which has no oxide film or has an oxide film smaller in thickness.
    Type: Grant
    Filed: April 24, 1996
    Date of Patent: June 17, 1997
    Assignee: Asahi Tec Corportion
    Inventors: Yasuo Sugiura, Hiroshi Seo, Seiji Saikawa
  • Patent number: 5595236
    Abstract: An apparatus for vertical squeeze casting, which alters conventional apparatuses for vertical squeeze casting using squeeze casting methods to manufacture highly-detailed cast products of high quality by locally pressing the molten metal injection filled into the metal mold cavity, by improving the molten metal supplying mechanism and cast product extraction method, so that local pressing of the cast product from all vertical and lateral directions is enabled, thereby enabling the production of cast products with many variations in thickness and complex structures.
    Type: Grant
    Filed: May 8, 1995
    Date of Patent: January 21, 1997
    Assignee: Korea Institute of Science and Technology
    Inventors: Ho-In Lee, Ki-Bae Kim, Yo-Sub Han, Yong-Joon Kim
  • Patent number: 5560419
    Abstract: In a pressure-casting method and apparatus, wherein a metal melt is fed in a mold cavity and then an oscillating squeeze pressure is applied to the melt by a squeezing plunger of a hydraulic cylinder moving with an oscillating stroke varying to compensate for shrinkage of the melt while being solidified, the hydraulic cylinder is feedback-controlled, using a control unit including a detector for detecting information on an actual squeeze pressure, so that a pressure converted from the actual oscillating squeeze pressure to have a mean value of zero copies a desired alternately positive and negative impulsive pressure pattern or locus representing a pressure oscillated to have a mean value of zero with a given amplitude and frequency versus an elapse of time.
    Type: Grant
    Filed: December 9, 1994
    Date of Patent: October 1, 1996
    Assignee: Ube Industries, Ltd.
    Inventors: Atsushi Yoshida, Naomichi Yamamoto, Mitsuru Adachi, Thoru Tsuno, Kazuki Hiraizumi
  • Patent number: 5555924
    Abstract: A stroke S of a squeeze pin under no load condition of a squeeze pin cylinder for driving the squeeze pin is detected. A value (S-.alpha.) obtained by subtracting a small value .alpha. from the detected stroke S of the squeeze pin is determined as a set stroke of the squeeze pin. After a predetermined waiting time has elapsed from when melted metal is charged into a cavity completely, the squeeze pin is advanced. Here, the actual stroke Sf of the squeeze pin is detected, and the detected stroke Sf is compared with set stroke (S-.alpha..+-..beta.), where .beta. is an allowable deflection. As the result of comparison, if Sf oversteps the set limits (S-.alpha..+-..beta.), at least one of parameters (the pressure and the flow rate of hydraulic fluid supplied to the squeeze pin cylinder and the waiting time) is corrected, so that the detected stroke value Sf approaches the set stroke (S-.alpha.) for the succeeding casting cycle.
    Type: Grant
    Filed: October 25, 1994
    Date of Patent: September 17, 1996
    Assignee: Toshiba Kikai Kabushiki Kaisha
    Inventors: Norihiro Iwamoto, Masayuki Takamura, Tai Matsuda
  • Patent number: 5482101
    Abstract: Pressing-in devices of pressure die casting machines operate as hydraulically driven multiphase as pressing-in systems in order to exercise a different pressure on the casting material during different phases of the casting operation. The casting piston of a pressing-in device is driven by at least one electric motor. In this case, the drive advantageously takes place using a multispeed servomotor which interacts with a multiple-roll spindle.
    Type: Grant
    Filed: March 28, 1994
    Date of Patent: January 9, 1996
    Assignee: Oskar Frech GmbH & Co.
    Inventor: Roland Fink
  • Patent number: 5454416
    Abstract: A vacuum casting apparatus in which a molding cavity is reduced in pressure substantially to a vacuum, and upon opening a gate, a molten metal which has been raised to a molten metal retaining dome is charged into the molding cavity via a runner at a high speed. The runner has a first portion making a pool of molten metal, a second portion connecting the molten metal retaining dome to the first portion, and a third portion connecting the first portion to the molding cavity. A pin is slidably provided in the first portion of the runner. An opening of the second portion of the runner to the first portion is located nearer to the pin than an opening of the third portion of the runner to the first portion. When the pin is moved into the first portion of the runner, the pin first closes the opening of the second portion and then begins to apply pressure the molten metal in the molding cavity.
    Type: Grant
    Filed: June 29, 1994
    Date of Patent: October 3, 1995
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Atushi Ota, Yasuyuki Arakawa, Tamotsu Hasegawa
  • Patent number: 5447188
    Abstract: Liquid metal is supplied from the bottom to the top into a casting mold by way of a casting runner and a filling hole arranged at the lowest point of a casting mold. Direct further use of the casting by avoiding formation of a sprue that must be subsequently processed is possible due to the fact that after totally filling the casting mold and only partial solidification of the metal therein, the casting pressure is decreased or turned off, so that liquid metal flows back out of the casting mold only through a return flow channel having a cross section significantly smaller than the cross section of the casting runner. A ram having a face corresponding in size and shape to the outer contour of the casting in the region of the filling hole is pushed at least over the last segment of the casting runner, thus displacing liquid metal present in the last segment into the casting mold sufficiently far in the direction of the mold interior until the fact of the ram aligns with the inner contour of the casting mold.
    Type: Grant
    Filed: September 17, 1993
    Date of Patent: September 5, 1995
    Assignee: Bachmann Giesserei und Formenbau GmbH & Co. KG
    Inventors: Peter Srostlik, Alfred Walter
  • Patent number: 5433262
    Abstract: A process and an apparatus for manufacturing a cast product in which the cavity 2c is defined by a top die 1, a bottom die 2 and a slidable die insert 11 relative to the top die 1 and a pressure is applied to the die insert 11 by a hydraulic cylinder 13 before casting, injecting a molten metal 6 at a pressure higher than that on the die insert 11 to cause the die insert 11 to move rearward, whereby the molten metal 6 is additionally filled in the cavity 2c by an amount corresponding to the shrinkage due to pressurization, and a pressure on the molten metal 6 within the cavity 2c is maintained through the die insert 11 even after the molten metal 6 in the gate 2b has been solidified and the injection pressure has: not been transmitted anymore.
    Type: Grant
    Filed: March 1, 1993
    Date of Patent: July 18, 1995
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kenji Kawaguchi, Mikio Yamashita, Shigeki Maekawa
  • Patent number: 5207264
    Abstract: The machine includes an upper secondary pressure cylinder to give an added pressure onto a backing plate to which an upper die half is attached, and a lower secondary pressure cylinder connected to a main pressure cylinder, which moves a plunger rod to squeeze molten metal into the casting cavity, in a lower section to give an added pressure onto the lower die half through the plunger rod of the main pressure cylinder.
    Type: Grant
    Filed: August 28, 1991
    Date of Patent: May 4, 1993
    Assignee: Jih-Lee You
    Inventor: Ching-Tsorng You