EP1230050A2 - Verfahren zum urformen eines werkstoffes - Google Patents
Verfahren zum urformen eines werkstoffesInfo
- Publication number
- EP1230050A2 EP1230050A2 EP00982977A EP00982977A EP1230050A2 EP 1230050 A2 EP1230050 A2 EP 1230050A2 EP 00982977 A EP00982977 A EP 00982977A EP 00982977 A EP00982977 A EP 00982977A EP 1230050 A2 EP1230050 A2 EP 1230050A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- mold
- casting
- voltage
- metal
- hand
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 63
- 239000000463 material Substances 0.000 title description 4
- 229910052751 metal Inorganic materials 0.000 claims abstract description 54
- 239000002184 metal Substances 0.000 claims abstract description 54
- 238000005266 casting Methods 0.000 claims description 71
- 238000000465 moulding Methods 0.000 claims description 16
- 238000007711 solidification Methods 0.000 claims description 13
- 230000008023 solidification Effects 0.000 claims description 13
- 238000005242 forging Methods 0.000 claims description 9
- 238000004512 die casting Methods 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 8
- 238000007493 shaping process Methods 0.000 claims description 7
- 230000001965 increasing effect Effects 0.000 claims description 5
- 238000005429 filling process Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 239000013078 crystal Substances 0.000 claims description 3
- 238000007528 sand casting Methods 0.000 claims description 3
- 238000009529 body temperature measurement Methods 0.000 claims description 2
- 230000003111 delayed effect Effects 0.000 claims description 2
- 239000012528 membrane Substances 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 claims 2
- 230000001105 regulatory effect Effects 0.000 claims 2
- 238000002604 ultrasonography Methods 0.000 claims 2
- 230000005236 sound signal Effects 0.000 claims 1
- 230000007704 transition Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 abstract 1
- 230000037431 insertion Effects 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 6
- 229910001338 liquidmetal Inorganic materials 0.000 description 6
- 230000001939 inductive effect Effects 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 230000005672 electromagnetic field Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000010117 thixocasting Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- STMIIPIFODONDC-UHFFFAOYSA-N 2-(2,4-dichlorophenyl)-1-(1H-1,2,4-triazol-1-yl)hexan-2-ol Chemical compound C=1C=C(Cl)C=C(Cl)C=1C(O)(CCCC)CN1C=NC=N1 STMIIPIFODONDC-UHFFFAOYSA-N 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/02—Preliminary treatment of metal stock without particular shaping, e.g. salvaging segregated zones, forging or pressing in the rough
- B21J1/025—Preliminary treatment of metal stock without particular shaping, e.g. salvaging segregated zones, forging or pressing in the rough affecting grain orientation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J9/00—Forging presses
- B21J9/02—Special design or construction
- B21J9/06—Swaging presses; Upsetting presses
- B21J9/08—Swaging presses; Upsetting presses equipped with devices for heating the work-piece
-
- 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
- B22D17/007—Semi-solid pressure die casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
Definitions
- the invention relates to a method for the primary shaping of a material, in which a metal is converted into another shape in a primary shaping process.
- Such primary molding processes include Casting processes such as die casting, gravity die casting and sand casting processes, as well as forging and drop forging processes, in which a metal is converted into another shape.
- the temperature development of the metal is important for better machinability and a desired microstructure.
- a liquid metal or (in the case of thixo-casting or solid state melting) pastates or softened solid metal solidifies in the original mold it is advantageous to control the temperature profile of the metal.
- To control the temperature profile e.g. from DE 195 45 177 AI known to inductively supply the workpiece or metal with a time-variable electromagnetic field. As a result, a defined amount of heat can be introduced into the workpiece, and the local and temporal distribution of the inductive field can be varied. The change in the electromagnetic field can be made dependent on the deformation state of the workpiece.
- Such inductive heating of a workpiece can already prevent local solidification and undesired premature cooling of the workpiece.
- the inductive coupling of the electromagnetic waves can, however, when using larger tools, such as one larger die-casting device with metallic mold halves, can be problematic since eddy currents are also induced in the mold halves by the time-varying or oscillating electromagnetic field.
- the invention has for its object to provide improvements over the prior art and in particular to create new primary shaping processes with which heat can be supplied to a metal in a desired manner with relatively little effort, the supply of heat advantageously being able to be varied spatially and temporally.
- This object is achieved according to the invention in that during a filling process before the forming process and / or during the primary molding process and / or during a post-treatment in the primary mold after the primary molding process, a conductively generated voltage is applied to parts of the primary molding device such that a closed circuit is formed is, and the metal is conductively supplied with thermal energy, the closed circuit running through the metal.
- the metal is thus conductively heated, i.e. an electrical current is passed through the metal.
- a voltage is applied to suitable parts of the tools used or the master molding device, between which the metal is located.
- a conductive heating can be achieved with relatively little expenditure on equipment by connecting a current source suitable for this purpose to the desired parts of the device.
- a welding current source can be used as the current source, which has the desired high current strengths of, for example, greater than or equal to 100 A at the desired voltage of, for example, less than or equal to 100 V.
- the voltage can be entered in particular on components that have a large contact area with the metal, such as in the case of a casting device, the casting piston, the casting chamber or mold halves, so that a relatively uniform supply of heat to the metal can be achieved. Since the electrical resistance of the metal also increases with increasing temperature, natural negative feedback occurs in the metal, so that when some areas of the metal are heated to a greater extent, the resistance increases and the current flows increasingly through other, cooler areas of the metal.
- the tension can be applied in all areas of the primary shaping device.
- a die casting device e.g. the casting piston, the casting chamber, the anvil, the mold halves or a slide
- the voltage can be connected directly to these components.
- electrodes in the relevant components for connecting the voltage source, which according to the invention represent parts of the primary shaping device.
- the use of electrodes can e.g. be useful in mold halves that have ceramic insulation from the mold cavity.
- the power supply can take place differently in individual phases of the method.
- a voltage can advantageously be applied between the plunger and anvil during the filling phase, in which the molten or paste-like metal is filled into the casting chamber, so that a current is generated through the length of the casting chamber through the metal.
- the temperature of the metal can be kept constant; it is also possible to adjust the temperature rature of the metal in the casting chamber, so that unnecessary energy is not consumed in a melting phase before filling. Later heating is particularly useful in thixo-casting processes or SMS (Solid State Melting) processes, in which a wipe of a merely softened or slightly paste-like metal is introduced, since unnecessary heating of the wad or keeping the preheated warp warm can be at least partially prevented before filling.
- SMS Solid State Melting
- a voltage can be applied in particular between the mold halves, so that the metal located in the mold cavity is heated directly between the mold halves.
- electrodes can also be used in addition.
- Metallic heat sinks attached to the mold halves can also be used as electrodes, for example, so that it is unnecessary to attach further electrodes to existing devices.
- a current can also be generated between the casting piston or casting chamber and one or both mold halves, so that the metal which is still in the casting chamber and in the gate is also heated. If slides are used to produce the desired die-casting molds, they can also be used as a connection point for the tension with respect to another slider, one or both mold halves or in particular the casting piston and / or casting chamber.
- a further temperature treatment to improve the structure in which the material is conductively supplied with heat in the desired areas in the desired manner, can be carried out without further aids.
- electrodes embedded in the casting e.g. Cores are used, which ensures a current supply even in areas of the metal that have detached from the mold halves.
- the method according to the invention can be carried out manually on the one hand.
- the voltage or current profile can be varied depending on the calculated or measured function curves.
- a desired start-up or switch-off characteristic can be carried out when increasing and decreasing the current strengths.
- control with temperature measurement of the metal is also advantageously possible, so that the voltage or current intensity depends on a temperature structure or the temperature values measured in several points of the metal.
- the temperature can in particular be kept constant or a temperature drop in the metal can be delayed.
- Another measured variable can also be measured for regulation.
- an internal mold pressure between the mold halves can be measured.
- This measurement can be carried out, for example, by a membrane provided flush in the mold surface or inner surface of the mold halves, which is connected to a piezo crystal attached outside the mold interior.
- a piezo crystal can be provided under an ejector pin, so that a measurement of the mold internal pressure is possible via the displaceable ejector pin.
- FIG. 1 shows the schematic structure of a die casting device in a sectional view.
- Liquid metal e.g. Aluminum, magnesium or an aluminum or magnesium alloy, during a filling phase into the interior of a
- Casting chamber 7 filled.
- the casting piston 8 in the retracted position shown in the figure.
- the liquid metal 13 fills the interior of the casting chamber 7 with a degree of filling of, for example, 30 to 80%.
- the casting piston 8 is pressed against an anvil 10, so that the liquid metal 13 is pressed into a mold cavity 1 between two mold halves 2 and 3 and subsequently solidifies.
- the mold halves 2 and 3 are then pulled apart, thus releasing the original workpiece.
- a slide 4 or more slides can be guided into the mold cavity, which are removed from the workpiece before the molding.
- the workpiece is conductively heated during one or more of these phases.
- a current is passed through the liquid metal 13 in the casting chamber 7 by applying a voltage between the casting piston 8 and the anvil 10.
- the anvil 10 can be electrically insulated or not insulated from the casting chamber 7. In the case of electrical insulation, a possible short-circuit current from the casting piston via the casting chamber to the anvil 10 is prevented or reduced.
- a voltage can be applied between the casting piston 8 and a mold half 2 or 3, so that a current flows along the liquid metal in the casting chamber and the partially or completely filled mold cavity.
- the mold halves 2 and 3 can be connected in parallel, so that they are connected together as an electrode against the casting piston 8. This allows a uniform current distribution in the workpiece
- Mold cavity 1 and thus an even supply of heat be enough. Furthermore, alternatively or additionally, it is possible to apply a voltage between the mold halves 2 and 3 so that a current flows directly through the metal between the mold halves and heats it. Furthermore, a voltage can also be switched between the casting chamber 7 and one or both mold halves 2, 3. It is also possible, in addition or as an alternative, to apply a voltage between a slide 4 and one or both mold halves 2, 3 or between slide 4 and the casting piston, casting chamber or anvil 10, so that a current flows through the mold cavity 1.
- an electrode 12 can also be used for voltage connection, for example if a ceramic insulating layer 5, 6 on one or both mold halves 2, 3 is so strong that it is difficult to carry current through it.
- the electrode can also be electrically insulated from the mold halves.
- a current can be connected between the casting piston 8 and / or casting chamber 7 and one or both mold halves 2, 3 or an electrode 12 or a slide 4 in order to keep the metal in the gate 11 liquid.
- a current flow can also be maintained after solidification, preferably, for example, between the mold halves or between casting pistons and one or both mold halves. In this way, temperature treatment to improve the structure can be achieved.
- a casting piece not shown in the figure, is to be poured into the metal, it can, if it is electrically conductive, be used directly for connecting the voltage. Alternatively, electrodes can be attached to the casting.
- the voltages of e.g. less than / equal to 100 V and currents of e.g. deliver greater than / equal to 100 A so that existing devices can be used. Start-up and run-down curves can also be used to regulate the current.
- the method according to the invention can also e.g. can be used for gravity casting or sand casting processes, the current being introduced from one casting mold half over another casting mold half or an electrode, or via a feed device for the metal. Furthermore, a use for forging processes or drop forging processes is possible, in which a current is advantageously fed directly via the forging molds.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Forging (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Containers And Plastic Fillers For Packaging (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19950037 | 1999-10-16 | ||
| DE19950037A DE19950037C2 (de) | 1999-10-16 | 1999-10-16 | Verfahren und Vorrichtung zum Urformen eines Werkstoffes |
| PCT/DE2000/003538 WO2001028713A2 (de) | 1999-10-16 | 2000-10-10 | Verfahren zum urformen eines werkstoffes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1230050A2 true EP1230050A2 (de) | 2002-08-14 |
| EP1230050B1 EP1230050B1 (de) | 2005-08-10 |
Family
ID=7925972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00982977A Expired - Lifetime EP1230050B1 (de) | 1999-10-16 | 2000-10-10 | Verfahren zum urformen eines werkstoffes und vorrichtung zu dessen durchführung |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6820679B1 (de) |
| EP (1) | EP1230050B1 (de) |
| AT (1) | ATE301521T1 (de) |
| AU (1) | AU1993001A (de) |
| DE (2) | DE19950037C2 (de) |
| ES (1) | ES2246256T3 (de) |
| WO (1) | WO2001028713A2 (de) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070023158A1 (en) * | 2005-08-01 | 2007-02-01 | Honda Motor Co., Ltd. | Method of and apparatus for manufacturing joined body |
| DE102005037982B3 (de) * | 2005-08-02 | 2007-03-15 | Leibniz-Institut Für Festkörper- Und Werkstoffforschung Dresden E.V. | Verfahren zur Herstellung metallhaltiger Gusskörper und Vorrichtung dafür |
| US7464744B2 (en) * | 2005-09-13 | 2008-12-16 | Peter Manoff | Shot sleeve insert and method of retarding heat erosion within a shot sleeve bore |
| DE102011050149A1 (de) * | 2010-11-17 | 2012-05-24 | Ferrofacta Gmbh | Druckgussdüse und Druckgussverfahren |
| DE202011002519U1 (de) | 2011-02-09 | 2011-05-12 | Ziegler, Sven | Vorrichtung zur Abdeckung und Befestigung von Leitungen in Werkzeugen |
| DE102012002429A1 (de) | 2012-02-09 | 2014-02-06 | Sven Ziegler | Vorrichtung zur Abdeckung und Befestigung von Leitungen in Werkzeugen |
| US10486229B1 (en) | 2012-03-30 | 2019-11-26 | Brunswick Corporation | Method and apparatus for avoiding erosion in a high pressure die casting shot sleeve for use with low iron aluminum silicon alloys |
| US9114455B1 (en) | 2012-03-30 | 2015-08-25 | Brunswick Corporation | Method and apparatus for avoiding erosion in a high pressure die casting shot sleeve for use with low iron aluminum silicon alloys |
| US9114456B1 (en) | 2012-03-30 | 2015-08-25 | Brunswick Corporation | Method and apparatus for avoiding erosion in a high pressure die casting shot sleeve for use with low iron aluminum silicon alloys |
| US9757795B1 (en) | 2012-03-30 | 2017-09-12 | Brunswick Corporation | Method and apparatus for avoiding erosion in a high pressure die casting hot sleeve for use with low iron aluminum silicon alloys |
| US9731348B1 (en) | 2012-03-30 | 2017-08-15 | Brunswick Corporation | Method and apparatus for avoiding erosion in a high pressure die casting shot sleeve for use with low iron aluminum silicon alloys |
| DE202013004840U1 (de) | 2013-05-25 | 2013-06-27 | Sven Ziegler | Vorrichtung zur Abdeckung und Befestigung von Leitungen in Werkzeugen |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB114790A (en) | 1917-12-03 | 1918-04-18 | Cecil Benjamin Greenhill | An Improved Method of Cooling-off of Castings. |
| CH267159A (de) * | 1945-03-24 | 1950-03-15 | Philips Nv | Verfahren zur Herstellung von Gussstücken, insbesondere Matrizen, aus dickflüssigen Metallen und Metallegierungen. |
| GB685182A (en) | 1950-03-01 | 1952-12-31 | Deutsche Edelstahlwerke Ag | Process of casting metallic material into a space between an outer wall and a core |
| JPS5554255A (en) * | 1978-10-18 | 1980-04-21 | Hitachi Metals Ltd | Molten metal part cooler |
| GB2103974B (en) | 1981-08-21 | 1985-04-11 | Honda Motor Co Ltd | An electric upsetting device |
| ZA849509B (en) | 1984-06-22 | 1985-07-31 | Acervo Sa | Casting process |
| DE4126175A1 (de) * | 1991-08-07 | 1993-02-11 | Montanstahl Ag Profilwalzwerk | Verfahren und vorrichtung zum erwaermen von elektrisch leitfaehigem material |
| DE4132732A1 (de) * | 1991-10-01 | 1993-04-08 | Friedhelm Prof Dr Ing Kahn | Verfahren und vorrichtung zur erzeugung von bauteilen |
| GB9209308D0 (en) | 1992-04-30 | 1992-06-17 | Burdett Savile | Casting technique |
| DE19545177B4 (de) | 1995-12-04 | 2005-11-17 | Leifeld Metal Spinning Gmbh | Verfahren zum Drückwalzen eines Werkstücks |
| US5743322A (en) * | 1996-06-27 | 1998-04-28 | General Electric Company | Method for forming an article extension by casting using a ceramic mold |
| DE19637844A1 (de) * | 1996-09-17 | 1998-03-19 | Grohe Armaturen Friedrich | Beheizbare Form |
| DE19825223C2 (de) * | 1998-06-05 | 2000-11-30 | Fraunhofer Ges Forschung | Formwerkzeug und Verfahren zu dessen Herstellung |
| JP3494020B2 (ja) * | 1998-07-03 | 2004-02-03 | マツダ株式会社 | 金属の半溶融射出成形方法及びその装置 |
-
1999
- 1999-10-16 DE DE19950037A patent/DE19950037C2/de not_active Expired - Fee Related
-
2000
- 2000-10-10 WO PCT/DE2000/003538 patent/WO2001028713A2/de not_active Ceased
- 2000-10-10 AT AT00982977T patent/ATE301521T1/de not_active IP Right Cessation
- 2000-10-10 EP EP00982977A patent/EP1230050B1/de not_active Expired - Lifetime
- 2000-10-10 AU AU19930/01A patent/AU1993001A/en not_active Abandoned
- 2000-10-10 DE DE50010936T patent/DE50010936D1/de not_active Expired - Fee Related
- 2000-10-10 ES ES00982977T patent/ES2246256T3/es not_active Expired - Lifetime
- 2000-10-10 US US10/110,177 patent/US6820679B1/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0128713A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2001028713A3 (de) | 2001-09-13 |
| ATE301521T1 (de) | 2005-08-15 |
| WO2001028713A2 (de) | 2001-04-26 |
| DE19950037A1 (de) | 2001-05-03 |
| US6820679B1 (en) | 2004-11-23 |
| ES2246256T3 (es) | 2006-02-16 |
| DE50010936D1 (de) | 2005-09-15 |
| EP1230050B1 (de) | 2005-08-10 |
| DE19950037C2 (de) | 2001-12-13 |
| AU1993001A (en) | 2001-04-30 |
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Legal Events
| Date | Code | Title | Description |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| 17P | Request for examination filed |
Effective date: 20020411 |
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