EP0618025B1 - Einpressaggregat - Google Patents
Einpressaggregat Download PDFInfo
- Publication number
- EP0618025B1 EP0618025B1 EP94103175A EP94103175A EP0618025B1 EP 0618025 B1 EP0618025 B1 EP 0618025B1 EP 94103175 A EP94103175 A EP 94103175A EP 94103175 A EP94103175 A EP 94103175A EP 0618025 B1 EP0618025 B1 EP 0618025B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spindle
- injection unit
- rotors
- casting
- unit according
- 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.)
- Expired - Lifetime
Links
Images
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
- B30B1/18—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by screw means
- B30B1/181—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by screw means the screw being directly driven by an electric motor
Definitions
- the invention relates to a press-in unit for a die casting machine, with a casting plunger for pressing in casting material into the shape that over a spindle that interacts with a nut is driven by an electric motor.
- Modern press-in units of die casting machines are multi-phase press-in systems, especially designed three-phase systems.
- a first, slow preparatory phase the The plunger moves forward until the casting material reaches the gate is brought up while in a second phase short filling time and high pressing speed into the mold cavity of the locking part is pressed.
- crucial third phase there is a compression of the die casting under high To press.
- the casting piston is used to carry out these phases an elaborate, several pressure accumulators as well as control and Hydraulic control devices connected.
- a press-in unit of this type is known from DE 29 22 914 C2.
- three pressure accumulators are provided, the various with check, seat and control valves provided lines with the casting piston cylinder in Connect.
- the pressure medium from the first pressure accumulator moves the plunger from a rest position to one Position in which the casting material is at the gate, after which Reversal of a seat valve pressure medium from the second Accumulator under high pressure and at high speed is guided on the casting piston, so that the casting material is quickly shot into the mold.
- the third pressure accumulator upstream seat valve switched so that the in this third pressure accumulator pending pressure on a multiplier piston and by using a gear ratio can be passed on to the casting piston.
- a press-in unit with a casting piston of the type mentioned Art is known from EP 0 430 616 A1.
- this publication also shows otherwise only for machine tools, especially for Screw presses (Dubbel, paperback for mechanical engineering, 14. Edition, Springer Verlag, 81, p. 983 and 984) known arrangement an electric motor as a drive for a casting piston.
- a spindle rotatable by the motor is provided on which one mother connected to the casting piston runs.
- the invention is therefore based on the object of a press-in unit of the type mentioned in such a way that on separate protective devices for the spindle thread are dispensed with can be without the die casting process necessary conditions are impaired.
- the nut for the spindle is fixed to solve this task connected to the rotors of the electric motor and with a threaded section the spindle engaged, the Rotors complete as a threaded section of the spindle enclosing protective housing are formed.
- the sensitive thread section of the Spindle that is within the range provided for a ball screw Mother runs, completely encapsulated and therefore after protected outside. Those occurring in the rough casting operation Contamination that would otherwise be difficult to keep away from the drive can have no harmful influence in this way exert on the drive.
- the pouring piston movement can over it controlled precisely.
- the structure of the press-in unit is simplified because there is no longer a complex hydraulic system is necessary. The use of an environmentally unfriendly hydraulic fluid is avoided.
- the rotating movements of the electric motor also directly to control the casting process to be used.
- the respective position of the piston rod of the casting piston can be determined from the number of revolutions.
- Another embodiment sees one between the electric motor and the casting piston designed reduction. Let it through different pressures due to different Achieve torque forces, so that the drive even with larger ones Machines can be used.
- the electric motor can be one be a multi-stage electric motor, which means that the required for the press-in unit of die casting machines Power adjustment both in terms of speeds, as well as with regard to the forces to be generated.
- water cooling can be used for the electric motor itself be provided if its performance needs to be increased.
- the press-in unit (10) shown in FIG. 1 comprises an electric motor (20) with a two-stage servo motor two stators (21, arranged within a housing (28) 22) and rotors (23 and 24) associated with these stators is executed.
- the rotors (23, 24) are fixed with a between You arranged mother (25) connected, which with a thread (26) a threaded portion (14) of a ball screw (13) records.
- the spindle (13) extends coaxial to the axis of rotation of the rotors (23, 24).
- the rotors are hollow and form a protective housing for the Threaded section (14) of the spindle (13) that the threaded section (14) completely encapsulated.
- the spindle (13) is from a bore (30) on one of the end faces of the rotor housing led out tight.
- the spindle shaft, through the bore (30) from the area of the rotors (23, 24) extends through one with a Seal (31) provided opening (15) of a housing (11) Casting chamber inside (12) the same.
- a seal can also be provided.
- the end (13a) of the spindle (13) is inside (12) the casting chamber via a coupling (32) fixed to one end of a piston rod (16) connected.
- the pouring plunger which serves the pouring material as described above from inside the casting chamber in press the shape.
- a striker for such a shape is familiar to the person skilled in the art and e.g. known from WO 91/06 415 A1.
- the spindle (13) is used to drive the casting piston also the piston rod (16) by rotating the fixed with the Rotors (23, 24) of the electric motor (20) connected nut (25) in a longitudinal movement in the sense of the double arrow shown transferred.
- Electric motor (20) are operated in two speed levels. Its performance can be switched on or off by the second Stator can be changed. About the electric motor (20) can therefore on the casting piston both at different speeds, as well as with different forces.
- the spindle (13) is designed as a ball screw. This is clear from the details of Figure 2. By this configuration is the power transmission from the electric motor decisively improved on the casting piston.
- the embodiment shown in the drawing shows one two-stage servo motor.
- other electric drives can also be used be used.
- two are conceivable or more electric motors with different gear ratios connect to the ball screw (13).
- the threaded section (14) on the principle of a ball screw with a thread is equipped with high accuracy, the threads of which one have adapted cross-section for the circulation of balls, the in a corresponding thread (33) on the inside the mother (25) continues.
- the balls (34) are in the threads of the spindle (13) in the corresponding Threads (33) of the nut (25) in a known manner in circulation guided. You leave the threads at point (35) and become an entry point (36) via a deflection channel (37) led from where they are at the rotation of the mother (25), the is triggered by the rotary movement of the rotors (23, 24), get back into their threads.
- the mother (25) is, as Figure 2 shows, composed of two parts, the adjoin each other with a flange (38) and under Intermediate insertion of a preload adjuster (39)
- Bolts (40) are held by flanges (41) Rotors (23 and 24) and through the flanges (38) of the two Nut parts are passed.
- the nut (25) is non-rotatable with the Rotors (23 and 24) connected. If the stators (21 and 22) acted upon individually or collectively, or is also in a known control of the rotors (23 and 24) made, then the nut (25) with in corresponding Rotary movements offset. Through this rotation the spindle (13) becomes an axial movement in the desired manner causes that moves the plunger.
- the press-in unit according to the invention can be used both in warm chambers can also be used in cold chamber casting machines.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Press Drives And Press Lines (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Control Of Presses (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
- Luminescent Compositions (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
- Transmission Devices (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Description
- Fig. 1
- einen Ausschnitt des Querschnittes durch eine erfindungsgemäßes Einpreßaggregat mit einer von einem Elektromotor getriebenen Kugelumlaufspindel, und
- Fig. 2
- die vergrößerte Darstellung des Bereiches der Mutter der Kugelumlaufspindel der Figur 1.
Claims (9)
- Einpreßaggregat für eine Druckgießmaschine, mit einem Gießkolben zum Einpressen von Gießmaterial in die Form, der über eine Spindel, die mit einer Mutter zusammenwirkt, von einem Elektromotor angetrieben wird, dadurch gekennzeichnet, daß die Mutter (25) für die Spindel (13) fest mit den Rotoren (23, 24) des Elektromotors (20) verbunden und mit einem Gewindeabschnitt (14) der Spindel (13) in Eingriff steht, und daß die Rotoren als ein den Gewindeabschnitt (14) der Spindel (13) vollständig umschließendes Schutzgehäuse ausgebildet sind.
- Einpreßaggregat nach Anspruch 1, dadurch gekennzeichnet, daß die Spindel (13) eine Kugelumlaufspindel ist.
- Einpreßaggregat nach Anspruch 1, dadurch gekennzeichnet, daß die Kolbenstange des Gießkolbens als Spindel (13) ausgebildet ist.
- Einpreßaggregat nach Anspruch 1, dadurch gekennzeichnet, daß sich die Spindel (13) sich durch eine Öffnung (15) eines Gehäuses (11) der Gießkammer erstreckt und axial an eine Kolbenstange (16) angeschlossen ist, die mit dem Gießkolben verbunden ist.
- Einpreßaggregat nach Anspruch 1, dadurch gekennzeichnet, daß die Spindel (13) koaxial zu der Achse der Rotoren (23, 24) angeordnet und abgedichtet durch eine stirnseitige Öffnung (30) in einem der Rotoren (24) nach außen geführt ist.
- Einpreßaggregat nach Anspruch 1, dadurch gekennzeichnet, daß die axiale Länge des inneren Hohlraumes der Rotoren (23, 24) auf den maximalen Hub der Spindel (13) so abgestimmt ist, daß der Gewindeabschnitt (14) der Spindel (13) immer innerhalb des von den Rotoren (23, 24) gebildeten Schutzgehäuses verbleibt.
- Einpreßaggregat nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß eine zwischen Elektromotor (20) und Gießkolben geschaltete Untersetzung vorgesehen ist.
- Einpreßaggregat nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der Elektromotor (20) als mehrstufiger Antrieb ausgebildet ist.
- Einpreßaggregat nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß eine Wasserkühlung für den Elektromotor (20) vorgesehen ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4310310 | 1993-03-30 | ||
DE4310310A DE4310310A1 (de) | 1993-03-30 | 1993-03-30 | Einpreßaggregat |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0618025A1 EP0618025A1 (de) | 1994-10-05 |
EP0618025B1 true EP0618025B1 (de) | 1998-05-13 |
Family
ID=6484228
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94103175A Expired - Lifetime EP0618025B1 (de) | 1993-03-30 | 1994-03-03 | Einpressaggregat |
Country Status (6)
Country | Link |
---|---|
US (1) | US5482101A (de) |
EP (1) | EP0618025B1 (de) |
JP (1) | JP3348958B2 (de) |
AT (1) | ATE166010T1 (de) |
DE (2) | DE4310310A1 (de) |
ES (1) | ES2117163T3 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7387253B1 (en) * | 1996-09-03 | 2008-06-17 | Hand Held Products, Inc. | Optical reader system comprising local host processor and optical reader |
EP1044743B1 (de) * | 1999-04-13 | 2003-08-06 | Oskar Frech Gmbh & Co. | Warmkammer-Druckgiessmaschine |
EP1057560A1 (de) * | 1999-06-01 | 2000-12-06 | Oskar Frech Gmbh & Co. | Einpressaggregat für eine Druckgiessmaschine |
EP1201334B1 (de) * | 2000-10-27 | 2005-03-23 | Oskar Frech GmbH + Co. KG | Warmkammerdruckgiessmaschine und Betriebsverfahren hierfür |
WO2002085599A1 (de) * | 2001-04-19 | 2002-10-31 | Demag Ergotech Gmbh | Spritzgiessmaschine mit elektromotorischem spindelantrieb und federarbeitsspeischer zur unterstützung des elektromotors |
US7172085B2 (en) * | 2001-12-04 | 2007-02-06 | Beaudette Susan A | Squeezable, fillable feeding device |
JP2006142369A (ja) * | 2004-11-24 | 2006-06-08 | Ykk Corp | 電動式射出ユニット及び同ユニットを備えたダイキャストマシンと電動式射出方法 |
JP2009297771A (ja) * | 2008-06-17 | 2009-12-24 | Sumitomo Heavy Industries Techno-Fort Co Ltd | 鍛造プレスにおけるノックアウト装置 |
CN104675784A (zh) * | 2013-11-30 | 2015-06-03 | 富泰华工业(深圳)有限公司 | 旋转下压气缸 |
CN117267285B (zh) * | 2023-11-21 | 2024-02-02 | 山西汤荣机械制造股份有限公司 | 一种便于散热的制动鼓及其铸造装置 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1804261A1 (de) * | 1968-06-18 | 1970-05-14 | Druckguss Heidenau Veb | Einpresssystem fuer Druckgiessmaschinen |
AT292222B (de) * | 1969-04-28 | 1971-08-25 | Peter Florjancic | Spindel-Schließvorrichtung, insbesondere für Spritzguß-Maschinen |
DE2922914A1 (de) * | 1979-06-06 | 1980-12-11 | Oskar Frech Werkzeugbau Gmbh & | Verfahren und anordnung zum steuern des einpressvorganges bei kaltkammer- druckgussmaschinen |
JPS61220817A (ja) * | 1985-03-28 | 1986-10-01 | Fanuc Ltd | 射出成形機の計量混練方式 |
JPS61235119A (ja) * | 1985-04-12 | 1986-10-20 | Nissei Plastics Ind Co | 射出成形機の射出制御方法及び装置 |
US4990084A (en) * | 1989-11-06 | 1991-02-05 | Cincinnati Milacron Inc. | Mold clamping system |
GB8927088D0 (en) * | 1989-11-30 | 1990-01-31 | Frys Metals Ltd | Casting apparatus |
-
1993
- 1993-03-30 DE DE4310310A patent/DE4310310A1/de not_active Withdrawn
-
1994
- 1994-03-03 AT AT94103175T patent/ATE166010T1/de active
- 1994-03-03 ES ES94103175T patent/ES2117163T3/es not_active Expired - Lifetime
- 1994-03-03 EP EP94103175A patent/EP0618025B1/de not_active Expired - Lifetime
- 1994-03-03 DE DE59405931T patent/DE59405931D1/de not_active Expired - Lifetime
- 1994-03-28 US US08/218,593 patent/US5482101A/en not_active Expired - Lifetime
- 1994-03-29 JP JP05885794A patent/JP3348958B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0747461A (ja) | 1995-02-21 |
ES2117163T3 (es) | 1998-08-01 |
DE59405931D1 (de) | 1998-06-18 |
JP3348958B2 (ja) | 2002-11-20 |
US5482101A (en) | 1996-01-09 |
DE4310310A1 (de) | 1994-10-06 |
ATE166010T1 (de) | 1998-05-15 |
EP0618025A1 (de) | 1994-10-05 |
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