EP1682293A4 - DEVICE AND METHOD FOR COOLING A CASTING LOAD - Google Patents
DEVICE AND METHOD FOR COOLING A CASTING LOADInfo
- Publication number
- EP1682293A4 EP1682293A4 EP04818651A EP04818651A EP1682293A4 EP 1682293 A4 EP1682293 A4 EP 1682293A4 EP 04818651 A EP04818651 A EP 04818651A EP 04818651 A EP04818651 A EP 04818651A EP 1682293 A4 EP1682293 A4 EP 1682293A4
- Authority
- EP
- European Patent Office
- Prior art keywords
- passage
- shot
- die
- block
- shot block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/2015—Means for forcing the molten metal into the die
- B22D17/2038—Heating, cooling or lubricating the injection unit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/08—Cold chamber machines, i.e. with unheated press chamber into which molten metal is ladled
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/2015—Means for forcing the molten metal into the die
- B22D17/2023—Nozzles or shot sleeves
Definitions
- the present invention relates to a method and apparatus for die casting parts, and more particularly, to a method and apparatus for die casting parts by cooling a shot plug or biscuit.
- High-pressure die casting is an important process for manufacturing high volume and low cost components. Examples from the automotive industry include automatic transmission housings, piston heads, and gear box components. In this process molten or semi-molten metal (generally aluminum alloy) is injected at high speed (around 50 to 100 m/s) and under very high pressures through complex gate and runner systems and into a die.
- molten or semi-molten metal generally aluminum alloy
- molten or semi-molten metal is injected under pressure into hardened steel dies, often water-cooled.
- the molten metal held in a separate furnace, is transferred by a ladle and poured into an extension tube, (generally called the shot sleeve), projecting from the entry point to the die.
- a conventional die casting machine typically includes a die composed of a cover die half and an ejector die half.
- the cover die half and the ejector die half mate with one another along a separation surface and together define multiple die cavities.
- the cover die half is stationary, while the ejector die half is movable so that when a molten charge injected therein solidifies, the ejector die half can then be moved apart from the cover die half so that the solidified charge in each mold cavity can be removed.
- Molten or semi-molten metal to be cast is charged into the die cavities by a charging assembly that includes a pressure cylinder or "shot sleeve" for receiving molten metal from an inlet, a piston movable in the shot sleeve for forcing the molten metal into the die cavities, and a shot block extending over the shot sleeve and connected to the die.
- the molten metal from the shot sleeve is supplied to the die cavities via passageways or "runners" defined in the separation surface between the cover die half and the ejector die half. Cooling flow passageways may be provided in the shot block for cooling the shot sleeve and thereby indirectly cooling the biscuit through the use of water, oil or other liquid as the cooling medium.
- the plunger moves along the shot sleeve and pushes the molten metal through the shot sleeve and into the runner and die cavity.
- This molten charge (more material than is required to fill the casting) is used to force additional metal into the die cavity to supplement alloy shrinkage that takes place during solidification.
- the metal charge in the shot sleeve (typically referred to as a "biscuit") will often still be molten, or at least partially molten, when the metal in the die cavities has completely solidified.
- the interconnected component and biscuit must sufficiently cool so as to form a solidified metal component consisting of the casting, runner, overflows, flash, and biscuit - as it is when removed from a die casting die.
- the present invention includes numerous advantages and benefits over the prior art. Particularly, the present invention utilizes a shot block that does not encompass the shot sleeve as know in the prior art so that cooling effects provided by the shot block act directly upon the biscuit rather than indirectly on the biscuit through the shot sleeve. As such, improved cooling effects on the biscuit are realized to reduce overall cycle time of the casting operation. By reducing the length of the shot sleeve and providing cooling grooves in the shot block, cycle times can be reduced 10-15%) and possible more.
- the invention is accomplished by a shot block that is located intermediate the die and the shot sleeve. Such a shot block includes a body having mutually opposed first and second engagement surfaces.
- a passage extends longitudinally through the body and defines an opening at the first engagement surface and an opening at the second engagement surface for transmitting a molten or semi-molten metal charge under pressure through the passage.
- a cooling channel within the body circulates a fluid therethrough to absorb heat from the metal charge located within at least a portion of the passage (i.e. the biscuit).
- FIG. 1 is a cross-sectional view of a prior art cold-chamber die casting operation showing the shot sleeve within the shot block.
- FIG. 2 is a cross-sectional view of the connection of FIG. 1 including drilled cooling lines in the shot block.
- FIG. 3 is a cross-sectional view of the shot sleeve connection of a cold- chamber die casting operation according to the present invention.
- FIG. 4 is a plan view of the shot block according to the present invention.
- FIG. 5 is a cross-sectional view of the shot block of FIG. 4 taken along line A- A.
- FIG. 6 is a cross-sectional view of the shot block of FIG. 4 taken along line B- B. DETAILED DESCRIPTION OF THE INVENTION
- molten metal is injected, under pressure, into hardened steel dies, often water-cooled.
- the molten metal held in a separate furnace, is transferred by a ladle and poured into an extension tube or shot sleeve 10 projecting from a shot block 12.
- the molten metal is injected into a runner 14 formed by a runner block 16 and is thereby forced into the cavity formed by the dies.
- FIG. 2 illustrates a known attempt to increase the cooling rate of the shot sleeve 10 to thereby increase the cooling rate of the biscuit 20.
- Cooling lines 18 are formed in the shot block 12 and filled with a cooling solution, often water, to assist in dissipating the heat encountered by the shot sleeve 10.
- a cooling solution often water
- the present invention utilizes a similar construction as previously described.
- the present invention utilizes a construction where the biscuit is directly cooled via the shot block.
- the shot sleeve of the present invention does not extend within the shot block thereby indirectly cooling the biscuit through the shot sleeve as known in the prior art.
- cooling channels or troughs are formed in the cover shot block and filled with a cooling solution, typically water, to dissipate heat from the biscuit. Therefore, the shortened shot sleeve provides direct cooling to the solidifying biscuit through the shot block via the cooling troughs.
- Such a construction also prevents the possible deformation or bowing of the shot sleeve, as described above, and the associated disadvantages related thereto.
- a die casting machine for creating a die cast component from a molten or semi-molten metal charge comprises a die 42, a shot block 44, a shot sleeve 46, and a plunger 48.
- any die configuration could be provide, generally a first die and a second die are configured for confronting engagement with one another along a separation surface and together define at least one die cavity therebetween. This die cavity is typically accessible through a runner 50.
- the shot sleeve 46 provides the molten or semi-molten charge to the die casting machine 40 by use of a plunger 48 or similar device. With a metal charge in the shot sleeve 46, the plunger 48 forces the charge through the shot block 44 and into the die cavity.
- the shot sleeve 46 has a passage 52 therethrough for transmitting the metal charge.
- the shot sleeve 46 abuts the shot block 44 wherein the shot sleeve passage is in fluid communication with the shot block passage for transmitting the metal charge to the shot block passage.
- the prior art inserts the shot sleeve into the shot block for transmittal of the molten metal charge to the die cavities
- the shot block 44 is located intermediate the die and the shot sleeve 46.
- the shot block 44 includes a body 51 having mutually opposed first and second engagement surfaces 53,55.
- the first engagement surface 53 abuts the shot sleeve and the second engagement surface 55 abuts the die.
- a passage 54 extends longitudinally through the body 51 and defines an opening 57 at the first engagement surface 53 and an opening 59 at the second engagement surface 55 for transmitting a molten or semi-molten metal charge under pressure through the passage 54.
- a cooling channel 56 is located within the body 51 for circulating a fluid therethrough to absorb heat from the metal charge located within at least a portion of the shot block passage (i.e. the biscuit 60).
- the plunger 48 disposed within the shot sleeve passage 52, forces the metal charge through the shot sleeve passage 52.
- the plunger With the shot block 44 located intermediate the die 50 and the shot sleeve 46, the plunger must be capable of entering the shot block passage 54 to continue to provide metal charge under pressure to the die cavity. As such, while the shot sleeve 46 abuts the shot block 44 and is held in place by convention means, the diameter of the shot block passage 54 is substantially similar and preferably identical to the diameter of the shot sleeve passage 52. Thus, the shot sleeve 46 will not enter the shot block passage 54 and the shot sleeve passage 52 will align with the shot block passage 54 to provide the molten charge. Further, such configuration will permit the plunger to travel through the shot sleeve passage 52 and into the shot block passage 54 to provide molten charge under pressure.
- both the shot sleeve passage 52 and the shot block passage 54 be substantially cylindrical in configuration and have a consistent diameter.
- the plunger has a diameter substantially identical to the shot sleeve and shot block passage diameters for improved transmittal of molten charge.
- any consistent configuration of the shot sleeve passage, the shot block passage, and the plunger will perform in the same manner, provided that their cross-sectional configurations are consistent. Such configuration could include, but are not limited to, square, rectangular, oval, circular, triangular, etc.
- the device and method of the present invention is an improvement over the prior art by providing a shortened shot sleeve 46 so as to provide direct cooling to the biscuit via the shot block 44 having cooling channels 56.
- the cooling channel 56 is located radially outwardly from the shot block passage 54. As best shown in FIGS. 4 through 6, the cooling channel 56 extends longitudinally within said shot block 44 and extends at least partially circumferentially about the shot block passage 54.
- the cooling fluid can be transmitted around at least a portion of the shot block passage 54 to dissipate heat in the biscuit 60 to promote increased cooling thereto. Therefore, heat transfer is optimized from the solidifying metal charge to gain a significant reduction in cycle time where the biscuit solidification time is the determinant.
- This technology can also be used in heavy runner blocks.
- the shot block 44 can be manufactured using the Direct Metal Deposition (DMD) technique which utilizes a laser under CNC control to melt metal powder that rapidly solidifies (thereby providing a small heat-affected zone and a fine grain structure). Pass by pass, layer upon layer, the object is built up, finally resulting in the finished object.
- DMD Direct Metal Deposition
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US51783203P | 2003-11-06 | 2003-11-06 | |
PCT/US2004/037170 WO2005046910A2 (en) | 2003-11-06 | 2004-11-08 | Device and method for cooling a shot plug |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1682293A2 EP1682293A2 (en) | 2006-07-26 |
EP1682293A4 true EP1682293A4 (en) | 2008-04-30 |
Family
ID=34590195
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04818651A Withdrawn EP1682293A4 (en) | 2003-11-06 | 2004-11-08 | DEVICE AND METHOD FOR COOLING A CASTING LOAD |
Country Status (4)
Country | Link |
---|---|
US (1) | US20050155738A1 (zh) |
EP (1) | EP1682293A4 (zh) |
CN (1) | CN100413615C (zh) |
WO (1) | WO2005046910A2 (zh) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2531548T3 (es) * | 2010-05-18 | 2015-03-17 | Georg Fischer Automotive (Suzhou) Co. Ltd | Dispositivo regulador de temperatura para una instalación de fundición a presión, así como instalación de fundición a presión correspondiente |
US9925583B2 (en) * | 2013-07-11 | 2018-03-27 | Crucible Intellectual Property, Llc | Manifold collar for distributing fluid through a cold crucible |
WO2017152904A2 (de) * | 2016-03-07 | 2017-09-14 | Ksm Castings Group Gmbh | GIEßKAMMER EINER KALTKAMMER-DRUCKGIEßMASCHINE MIT EINER KÜHLVORRICHTUNG SOWIE KÜHLVORRICHTUNG |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4583579A (en) * | 1983-07-25 | 1986-04-22 | Nippon Light Metal Co., Ltd. | Method of die casting |
JPH08267211A (ja) * | 1995-03-28 | 1996-10-15 | Masaishi Katsumi | ダイカスト用プランジャスリーブの変形制御方法 |
JPH10328804A (ja) * | 1997-06-06 | 1998-12-15 | Toshiba Corp | ダイカスト機用射出スリーブ、ダイカスト機用ブッシュおよびそれらを用いたダイカスト機 |
JP2001071108A (ja) * | 1999-09-07 | 2001-03-21 | Nissan Motor Co Ltd | ダイカスト機 |
JP2003010953A (ja) * | 2001-06-25 | 2003-01-15 | Daihatsu Motor Co Ltd | ダイカスト鋳造機用スプールブッシュ |
US20030051854A1 (en) * | 2001-06-15 | 2003-03-20 | Amitava Guha | Shot blocks for use in die casting |
JP2003136213A (ja) * | 2001-10-31 | 2003-05-14 | Toshiba Mach Co Ltd | ダイカストマシン用射出スリーブの構造 |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US472029A (en) * | 1892-04-05 | Circular-knitting machine | ||
US1935059A (en) * | 1931-01-02 | 1933-11-14 | Pack Charles | Die casting |
US2244816A (en) * | 1939-09-27 | 1941-06-10 | Aluminum Co Of America | Die casting apparatus |
US2391182A (en) * | 1942-01-26 | 1945-12-18 | Charles C Misfeldt | Method for pressure molding |
US4334575A (en) * | 1980-03-18 | 1982-06-15 | Nippon Light Metal Co., Ltd. | Method for cooling a plunger tip in a die casting machine of the cold chamber type and apparatus therefor |
JP2530087B2 (ja) * | 1992-12-09 | 1996-09-04 | 株式会社神戸製鋼所 | 高圧鋳造機におけるプランジャスリ―ブの冷却装置 |
JPH06198414A (ja) * | 1992-12-28 | 1994-07-19 | Ryobi Ltd | ダイカストマシンのプランジャーチップの冷却方法 |
US5322111A (en) * | 1993-02-16 | 1994-06-21 | A. H. Casting Services Limited | Ceramic lined shot sleeve |
JP3049648B2 (ja) * | 1993-12-13 | 2000-06-05 | 日立金属株式会社 | 加圧成形方法および加圧成形機 |
US5562146A (en) * | 1995-02-24 | 1996-10-08 | Wakefield Engineering, Inc. | Method of and apparatus for forming a unitary heat sink body |
JPH09103863A (ja) * | 1995-10-09 | 1997-04-22 | U Mold:Kk | ダイカスト法およびダイカスト用鋳込スリーブ装置 |
US6122564A (en) * | 1998-06-30 | 2000-09-19 | Koch; Justin | Apparatus and methods for monitoring and controlling multi-layer laser cladding |
US20020110649A1 (en) * | 2000-05-09 | 2002-08-15 | Skszek Timothy W. | Fabrication of alloy variant structures using direct metal deposition |
US6311761B1 (en) * | 1999-12-22 | 2001-11-06 | Ronald G. Steininger | Plunger tip for die casting apparatus |
CN1369337A (zh) * | 2001-02-15 | 2002-09-18 | 游家富 | 冷室压铸铝合金无拔模斜度的压铸方法 |
JP2002283031A (ja) * | 2001-03-27 | 2002-10-02 | Hitachi Metals Ltd | ダイカスト用スリーブ |
US6742567B2 (en) * | 2001-08-17 | 2004-06-01 | Brunswick Corporation | Apparatus for and method of producing slurry material without stirring for application in semi-solid forming |
US20040020625A1 (en) * | 2002-07-29 | 2004-02-05 | Jyoti Mazumder | Fabrication of customized die inserts using closed-loop direct metal deposition (DMD) |
-
2004
- 2004-11-08 CN CNB2004800399552A patent/CN100413615C/zh not_active Expired - Fee Related
- 2004-11-08 WO PCT/US2004/037170 patent/WO2005046910A2/en active Application Filing
- 2004-11-08 US US10/983,962 patent/US20050155738A1/en not_active Abandoned
- 2004-11-08 EP EP04818651A patent/EP1682293A4/en not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4583579A (en) * | 1983-07-25 | 1986-04-22 | Nippon Light Metal Co., Ltd. | Method of die casting |
JPH08267211A (ja) * | 1995-03-28 | 1996-10-15 | Masaishi Katsumi | ダイカスト用プランジャスリーブの変形制御方法 |
JPH10328804A (ja) * | 1997-06-06 | 1998-12-15 | Toshiba Corp | ダイカスト機用射出スリーブ、ダイカスト機用ブッシュおよびそれらを用いたダイカスト機 |
JP2001071108A (ja) * | 1999-09-07 | 2001-03-21 | Nissan Motor Co Ltd | ダイカスト機 |
US20030051854A1 (en) * | 2001-06-15 | 2003-03-20 | Amitava Guha | Shot blocks for use in die casting |
JP2003010953A (ja) * | 2001-06-25 | 2003-01-15 | Daihatsu Motor Co Ltd | ダイカスト鋳造機用スプールブッシュ |
JP2003136213A (ja) * | 2001-10-31 | 2003-05-14 | Toshiba Mach Co Ltd | ダイカストマシン用射出スリーブの構造 |
Also Published As
Publication number | Publication date |
---|---|
WO2005046910A2 (en) | 2005-05-26 |
CN1905968A (zh) | 2007-01-31 |
US20050155738A1 (en) | 2005-07-21 |
CN100413615C (zh) | 2008-08-27 |
WO2005046910A3 (en) | 2006-03-02 |
EP1682293A2 (en) | 2006-07-26 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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Effective date: 20060527 |
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Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LU MC NL PL PT RO SE SI SK TR |
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AX | Request for extension of the european patent |
Extension state: AL HR LT LV MK YU |
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DAX | Request for extension of the european patent (deleted) | ||
A4 | Supplementary search report drawn up and despatched |
Effective date: 20080402 |
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RIC1 | Information provided on ipc code assigned before grant |
Ipc: B22D 17/20 20060101AFI20080327BHEP |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20080602 |