WO1997012739A2 - Spritzgiessmaschine zur verarbeitung plastifizierbarer massen - Google Patents
Spritzgiessmaschine zur verarbeitung plastifizierbarer massen Download PDFInfo
- Publication number
- WO1997012739A2 WO1997012739A2 PCT/DE1996/001779 DE9601779W WO9712739A2 WO 1997012739 A2 WO1997012739 A2 WO 1997012739A2 DE 9601779 W DE9601779 W DE 9601779W WO 9712739 A2 WO9712739 A2 WO 9712739A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- spindle
- injection molding
- unit
- molding machine
- force
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
- B29C45/50—Axially movable screw
- B29C45/5008—Drive means therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/03—Injection moulding apparatus
- B29C45/07—Injection moulding apparatus using movable injection units
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/20—Injection nozzles
- B29C45/23—Feed stopping equipment
- B29C45/231—Needle valve systems therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/64—Mould opening, closing or clamping devices
- B29C45/66—Mould opening, closing or clamping devices mechanical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/20—Injection nozzles
- B29C45/23—Feed stopping equipment
- B29C2045/235—Feed stopping equipment axially movable inclined or orthogonal valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
- B29C45/50—Axially movable screw
- B29C45/5008—Drive means therefor
- B29C2045/5084—Drive means therefor screws axially driven by roller elements
Definitions
- the invention relates to an injection molding machine for processing plasticizable compositions according to the preamble of claim 1.
- a first assembly is responsible for closing the tool clamped in the mold clamping space, this assembly itself or another assembly is then intended to also apply the closing force here.
- a second assembly is responsible on the injection molding side for attaching the injection molding unit to the mold.
- a third assembly moves the injection bridge, with which the conveying means, a conveying screw or a conveying piston is connected, towards the carrier block of the plasticizing cylinder, so that there is a relative movement between the conveying means and the plasticizing cylinder, so that plasticized material in front of the conveying screw into the mold cavity can be injected.
- an ejector unit is provided on the closing side, which ejects the molded part from the mold cavity.
- an actuating unit for a nozzle needle can be provided on the injection molding unit, which is necessary depending on the processing material in order to prevent the plasticized material from flowing out of the nozzle.
- a planetary roller screw drive is known as a novel spindle drive, which combines the advantages of a planetary gear with the advantages of a roller spindle.
- planet rollers are provided between the nut and spindle, which are connected with their external thread on the spindle side to the thread of the spindle, and on the other hand have recesses between them, which are immersed in grooves on the mother side.
- a force transmission is thereby possible, so that a rapid rotary movement can be converted into a slow axial movement with an increase in force or vice versa.
- rotary movements can be converted very precisely into longitudinal movements.
- An essential distinguishing feature from conventional systems is the extremely large variation range of the slope.
- the planetary roller screw drive has already been proposed for the drive of plastic injection molding machines according to DE-A 44 09 822 on which the preamble of claim 1 is based. It is suitable for precise tasks as well as for the application of high forces, the precision required in the injection molding machine being achieved by preventing a passive turning back by means of securing means. This is made easier with these drives in that, on the one hand, the thread pitch, in particular of the spindle, can be selected very generously, on the other hand, these drives can nevertheless be rotated quickly with an acceptable noise emission. If necessary, the thread pitch can be chosen so small that self-locking occurs without losing cycle time during the movement.
- the present invention is based on the object of taking advantage of a planetary rolling To make the threaded spindle drive accessible to an application on an injection molding machine and at the same time to meet the requirements for precision.
- a corresponding power transmission can be realized using the planetary roller screw drive if appropriate securing means are provided.
- the parts of the planetary roller screw drive are mounted so that the rotatable part is movably mounted in the longitudinal direction, the storage being carried out against elastic return means.
- the force of the elastic restoring means is then overcome by an external force until the thread play, which disturbs the precision, is finally eliminated.
- the positions of the assemblies can be precisely recorded, in particular in connection with the associated absolute displacement measuring systems, so that the unpredictable influences of movements with slip become negligible.
- FIG. 2 shows an enlarged detail from FIG. 1 in the area of the mold clamping unit
- FIG. 3 shows an enlarged detail from FIG. 1 in the area of the injection molding unit
- Fig. 5 shows an enlarged detail from Fig. 4 in
- FIGS. 6-8 representations according to FIG. 5 in different embodiments
- FIG. 9 shows a section through a combination of a planetary gear with a planetary roller screw drive
- FIG. 10 is a representation according to FIG. 2 in another
- FIG. 11 shows an enlarged section from FIG. 10 in the area of the drive
- FIG. 12 shows a side view of a plasticizing unit with a drive for a closure nozzle
- FIG. 13 shows an enlarged section in the area of the drive of FIG. 12.
- FIG. 1 shows an injection molding machine which is usually suitable for processing plasticizable materials such as plastics, powdery, ceramic materials or similar materials.
- Such an injection molding machine initially comprises a mold closing unit F according to FIG. 2.
- This mold closing unit F has a stationary mold carrier 10 and a movable mold carrier 11.
- the two mold carriers form a mold clamping space R between them, which is intended to hold a tool M.
- the tool M encloses a mold cavity 13 in which molded parts 16 are produced.
- the movable mold carrier 11 can be moved towards and away from the stationary mold carrier via an electromechanical drive, here with a planetary roller screw, the closing mechanism being supported on a support element 38.
- the injection molding machine also has an injection molding unit S.
- a conveying means 12 is accommodated, which in the present case is a screw conveyor, but can be a delivery piston.
- the screw conveyor is over a Rotary motor 100 rotates.
- the plasticized material is conveyed into the mold cavity 13 by the conveying means after it has been plasticized by the plasticizing unit 14.
- this injection molding machine which here have electromechanical spindle drives which convert a rotational movement into a straight-ahead movement.
- this is initially at least one first assembly A designed as a clamping unit, which moves the mold carriers towards and away from one another in the mold clamping unit.
- This first assembly A can simultaneously apply the form-locking force, but there is also the possibility of providing a further assembly that applies the closing force, as is the case, for example, is explained in more detail in DE-C 44 11 649.
- the second assembly B which is intended for “driving the nozzle” and through which the nozzle 15 of the injection molding unit S can be placed on the tool M, is then formed on the injection molding side as a drive unit.
- These assemblies are usually built parallel to the axis and symmetrically to the spray axis in order to achieve a symmetrical introduction of force.
- An injection unit is provided as the third assembly C.
- This injection unit usually also consists of two drives that operate in parallel axes. It serves to drive the conveying means 12 relative to the plasticizing cylinder 14.
- the conveyor 12 is connected to an injection bridge 36.
- the third assembly C which is attached at the other end to the carrier block, which in turn receives the plasticizing unit 14, engages on the injection bridge. In the event of movement, there is a relative movement between the carrier block 35 and the injection bridge 36, so that at the same time there is a relative movement between the conveying means and the plasticizing unit 14.
- a fourth assembly D can also be provided as an ejector unit, core pull or unscrewing unit, which is intended to eject molded parts 16 from the tool M.
- This ejector unit is arranged in such a way that according to FIG. 97/12739 PC17DE96 / 01779
- a mechanism for actuating a shut-off needle 17 for the nozzle 15 of the injection molding unit can be provided as the fifth assembly E.
- At least one of these modules A, B, C, D, E, all modules in the exemplary embodiment, are equipped with an electromechanical spindle drive.
- Spindle and nut are part of planetary roller screw spindles P1, P2, P3, P4, P5, which are secured against turning back by locking means. 2
- Spindles 41 of this drive are connected to the movable mold carrier 11, the longitudinal movement of which takes place via two hollow shaft motors 40, which here are built-in motors with an integrated planetary Rolling lead screw drives are.
- the nut 42 is rotated while the spindle 41 is arranged in a rotationally fixed manner on the movable mold carrier 11 and is immersed in the cavity 40a of the hollow shaft motor.
- Support element 38 and stationary mold carrier 10 are connected to one another via a force transmission element 37, which here is a C-shaped, multi-part bracket.
- the alternative use of spars is possible without any problems.
- the hollow shaft motor 60 of the injection unit is attached to the carrier block 35 with respect to the third assembly C.
- the spindle 61 is rotatably connected to the injection bridge 36.
- the spindle pulls the injection bridge 36 to the carrier block 35.
- the spindle 61 plunges into a cavity 60a of the hollow shaft motor 60.
- the second assembly B is rotatably mounted on the support block with its spindle.
- the hollow shaft motor 50 is fixed to a stationary holding plate, which in turn is held at a distance from the stationary mold carrier 10 via the two guide columns 39.
- the spindle 51 pulls the entire unit against the stationary mold carrier 10, immersing it in the cavity 50a of the hollow shaft motor.
- Figure 4 shows a section through an assembly which is equipped with the planetary roller screw drive.
- the hollow shaft motor 18 is inserted as a built-in motor in a motor mount 43.
- the actual motor is located in area H, gears such as integrated planetary gears can be provided in area G, and in area W there is space for accommodating the planetary roller threaded spindle P.
- Spindle 20 is immersed in the hollow shaft motor. It is driven by the engine via a drive shaft 18a, which initially transmits its force to the nut 21. The nut 21 is in turn connected to the spindle via the planetary rollers 28.
- FIGS. 5 to 8 show various embodiments which contain securing means which secure the planetary roller threaded spindle against passive turning back. From FIG. 8, however, the exact principle of this planetary roller screw drive can be seen.
- the rotation is first transmitted to the nut 21 via the drive shaft 18a.
- the nut 21 is supported in ball bearings 23 in a bearing slide 24.
- the nut 21 has grooves 21b and recesses 21a on the inside. The grooves correspond to corresponding recesses in the planetary rollers, while a thread 28a of the planetary rollers 28 cooperates with the thread 20a of the spindle. A force transmission can take place in this way.
- Fig. 8 now shows the storage of this drive in the stator 44 of the hollow shaft motor.
- thread pitches on the spindle 20 and planetary roller are selected as securing means, which enable a self-locking connection, which may have to be purchased with a small pitch, but is compensated for when using this drive in that even high rotational speeds with low noise emissions possible are.
- a force decoupling cannot be carried out, so that the planetary roller threaded spindle is always exposed to the full forces.
- the bearing slide 24 can be displaced to a limited extent against an elastic restoring element 29.
- the spindle moves from the right, the spindle moves Carriage 24 to the left when the force of the restoring means 29 is exceeded, the nut 21 taking the holding disc 27 with it via the bolt 22.
- the dimension X3 disappears, so that the holding disc 27 for contact with the. Brake surface 43a of the motor mount 43 comes.
- the rotatable part here the nut 21 of the planetary roller screw drive, is movably mounted in the longitudinal direction of the spindle 20 against the force of the elastic restoring means 29.
- Blocking means in the form of the holding disk 27 are provided, which fix the parts of the drive in a rotationally secured manner as a result of a reaction force caused by an external force, while overcoming the force of the resetting means 29. This enables the drive components to be pressed against each other, which suppresses the thread play.
- FIGS. 5 and 6 show a further improvement of this rotationally secure fixing, once for a pushing spindle in FIG. 5 and for a pulling spindle in FIG. 6. Otherwise the same embodiment as in FIG. 7 pushes the spindle in FIG 5 from the right.
- a force occurs that exceeds the force of the restoring means 29, this leads to a displacement of the bearing slide 24 to the left in FIG. 5.
- the nut 21 takes the bolt 22 with it, but in this case, via a further elastic restoring means, only acts on the holding disc 25 when the dimension Y1 becomes so large that the dimension XI goes to zero. Only then can the holding disk 25 come into contact with the braking surface 43a of the motor mount.
- the holding disks 25 and 26 have profiles 25a, 26a, which are connected to the thread 20a of the spindle. This means that if there is a corresponding displacement when appropriate forces occur, the spindle is also secured against rotation in this area over a larger area.
- the planetary roller threaded spindle can be uncoupled from the power flow while increasing its service life, while the anti-rotation lock in FIG. 7 is achieved only by a flat contact between the holding disk 27 and the motor mount 43.
- FIG. 5 is preferably used for the first assembly A, an embodiment according to FIG. 6 for the second assembly B and an embodiment according to FIG. 8 for the third and fourth assemblies, because in particular with the last two modules C, D, a retaining washer is not required.
- a drive wheel 90 is provided in a motor, which co-operates with a conventional planetary gear, which consists of the planet wheels 91 and the sun wheel 92.
- a conventional planetary gear which consists of the planet wheels 91 and the sun wheel 92.
- the sun gear 92 there is again a planetary roller threaded spindle with planet rollers 28 and spindle 20.
- a spindle is coupled to a motor with an integrated planetary gear, which is rotated and in turn works in the area of the spindle itself with the non-rotatably arranged nut of a planetary roller threaded spindle.
- Corresponding power transmissions can also be realized in this way.
- FIG. 10 shows a further embodiment of the mold clamping unit F.
- the movable mold carrier 11 here has receptacles 11 a, to which the spindle nut 82 is fastened.
- a spindle projects through the spindle nut and dips into the receptacles 11a and is driven by a motor arranged on the support plate 38.
- FIG. 11 shows an enlarged representation in the area of the bearing.
- the motor 80 drives the spindle 81, the spindle being mounted so that it can move axially via elastic return means 85.
- a further storage takes place via the bearings 83.
- a holding disc 84 is assigned to the spindle, so that when an speaking force there is a frictional connection between the holding disc 84 and the support member 38.
- An additional power transmission can take place in the area of the nut 82 of the planetary roller screw drive.
- the fifth assembly E is shown in FIGS. 12 and 13.
- the planetary roller screw drive is connected with its spindle 33 directly to the actuating linkage 34 of the locking needle 95 for the nozzle 15.
- the assembly E forms a structural unit with the plasticizing unit 14, so that when the plasticizing unit 14 is changed, the fifth assembly is also changed.
- the drive motor is a hollow shaft motor 90, in the cavity 90a of which the spindle 33 is immersed. The spindle is driven by the nut 92.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96944557A EP0853538B1 (de) | 1995-10-02 | 1996-09-17 | Spritzgiessmaschine zur verarbeitung plastifizierbarer massen |
AT96944557T ATE188900T1 (de) | 1995-10-02 | 1996-09-17 | Spritzgiessmaschine zur verarbeitung plastifizierbarer massen |
DE59604250T DE59604250D1 (de) | 1995-10-02 | 1996-09-17 | Spritzgiessmaschine zur verarbeitung plastifizierbarer massen |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19536565.8 | 1995-10-02 | ||
DE19536565A DE19536565C2 (de) | 1995-10-02 | 1995-10-02 | Spritzgießmaschine zur Verarbeitung plastifizierbarer Massen |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1997012739A2 true WO1997012739A2 (de) | 1997-04-10 |
WO1997012739A3 WO1997012739A3 (de) | 1997-11-13 |
Family
ID=7773736
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1996/001779 WO1997012739A2 (de) | 1995-10-02 | 1996-09-17 | Spritzgiessmaschine zur verarbeitung plastifizierbarer massen |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0853538B1 (de) |
AT (1) | ATE188900T1 (de) |
DE (2) | DE19536565C2 (de) |
WO (1) | WO1997012739A2 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1023634C2 (nl) * | 2003-06-11 | 2004-12-14 | Otb Group Bv | Spuitgietinrichting alsmede werkwijze voor het gebruik van een dergelijke spuitgietinrichting. |
CN106584788A (zh) * | 2017-01-06 | 2017-04-26 | 广州维思车用部件有限公司 | 转轴蜗杆模具 |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19750057C2 (de) * | 1997-11-12 | 2000-08-03 | Karl Hehl | Formschließeinheit für eine Spritzgießmaschine |
JP3321766B2 (ja) | 1997-11-13 | 2002-09-09 | 東芝機械株式会社 | 射出成形機の射出装置 |
DE19847298C2 (de) | 1998-10-14 | 2000-11-02 | Karl Hehl | Spritzgießmaschine mit einem mehrere Antriebsgruppen umfassenden modularen Aufbau |
DE19956188C2 (de) * | 1999-11-22 | 2003-07-31 | Karl Hehl | Formschliesseinheit für eine Spritzgiessmaschine |
DE19956190C2 (de) * | 1999-11-22 | 2001-12-06 | Karl Hehl | Vorrichtung zur Durchführung einer zweistufigen linearen Bewegung |
DE19956215C2 (de) * | 1999-11-23 | 2003-09-18 | Otto Maenner Heiskanalsysteme | Heißkanal-Nadelverschluß-Düse mit einem Antrieb zum Verstellen der Verschlußnadel |
DE10101837B4 (de) * | 2001-01-17 | 2008-02-07 | Krauss Maffei Gmbh | Auswerfvorrichtung für eine Formmaschine |
NL1024055C2 (nl) * | 2003-08-06 | 2005-02-08 | Otb Group Bv | Spuitgietinrichting alsmede werkwijze voor het gebruik van een dergelijke spuitgietinrichting. |
DE102008023720B3 (de) * | 2008-05-15 | 2009-10-08 | Kraussmaffei Technologies Gmbh | Formschließeinheit einer Spritzgießmaschine |
CN102367885A (zh) * | 2011-09-21 | 2012-03-07 | 舒忠伟 | 一种水龙头及其制造方法 |
CN112123716A (zh) * | 2020-08-27 | 2020-12-25 | 杨孔星 | 一种高端装备制造用防凝料螺旋式注塑装置 |
DE102023101166A1 (de) | 2023-01-18 | 2024-07-18 | Roland Menzel | Schließeinheit für eine Spritzgussmaschine und Verfahren zum Betrieb einer Schließeinheit |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3739059A1 (de) * | 1987-11-17 | 1989-05-24 | Deutsche Forsch Luft Raumfahrt | Vorrichtung zur umwandlung einer drehbewegung in eine axialbewegung |
DE4317998C2 (de) * | 1993-05-29 | 1995-06-14 | Karl Hehl | Spritzgießeinheit für eine Kunststoff-Spritzgießmaschine |
DE4411649C2 (de) * | 1993-09-30 | 1997-10-02 | Karl Hehl | Schließeinheit für Formen zum Herstellen von Gegenständen aus plastifizierbaren Massen |
DE4409822C2 (de) * | 1994-02-19 | 1997-06-12 | Procontrol Ag | Antrieb für wenigstens eine linear bewegbare Achse einer Spritzgießmaschine |
-
1995
- 1995-10-02 DE DE19536565A patent/DE19536565C2/de not_active Expired - Fee Related
-
1996
- 1996-09-17 WO PCT/DE1996/001779 patent/WO1997012739A2/de active IP Right Grant
- 1996-09-17 EP EP96944557A patent/EP0853538B1/de not_active Expired - Lifetime
- 1996-09-17 DE DE59604250T patent/DE59604250D1/de not_active Expired - Fee Related
- 1996-09-17 AT AT96944557T patent/ATE188900T1/de not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
No further relevant documents disclosed * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1023634C2 (nl) * | 2003-06-11 | 2004-12-14 | Otb Group Bv | Spuitgietinrichting alsmede werkwijze voor het gebruik van een dergelijke spuitgietinrichting. |
CN106584788A (zh) * | 2017-01-06 | 2017-04-26 | 广州维思车用部件有限公司 | 转轴蜗杆模具 |
Also Published As
Publication number | Publication date |
---|---|
WO1997012739A3 (de) | 1997-11-13 |
EP0853538A2 (de) | 1998-07-22 |
DE19536565A1 (de) | 1997-04-03 |
DE59604250D1 (de) | 2000-02-24 |
ATE188900T1 (de) | 2000-02-15 |
DE19536565C2 (de) | 1998-07-16 |
EP0853538B1 (de) | 2000-01-19 |
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