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EP0618025B1 - Unité pour enfoncer du métal liquide - Google Patents

Unité pour enfoncer du métal liquide Download PDF

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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
Application number
EP94103175A
Other languages
German (de)
English (en)
Other versions
EP0618025A1 (fr
Inventor
Roland Fink
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oskar Frech GmbH and Co KG
Original Assignee
Oskar Frech GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Oskar Frech GmbH and Co KG filed Critical Oskar Frech GmbH and Co KG
Publication of EP0618025A1 publication Critical patent/EP0618025A1/fr
Application granted granted Critical
Publication of EP0618025B1 publication Critical patent/EP0618025B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Control Of Presses (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Luminescent Compositions (AREA)
  • Transmission Devices (AREA)

Claims (9)

  1. Unité d'injection pour une machine de coulée sous pression, comportant un piston de coulée servant à injecter le matériau de coulée dans le moule et qui est entraíné par un moteur électrique, par l'intermédiaire d'une broche, qui coopère avec un écrou, caractérisée en ce que l'écrou (25) pour la broche (13) est relié de façon fixe aux rotors (23, 24) du moteur électrique (20) et engrène avec une partie filetée (14) de la broche (13) et que les rotors sont agencés sous la forme d'un boítier de protection qui entoure complètement la partie filetée (14) de la broche (13).
  2. Unité d'injection selon la revendication 1, caractérisée en ce que la broche (13) est une broche à circulation de billes.
  3. Unité d'injection selon la revendication 1, caractérisée en ce que la tige du piston de coulée est agencée en tant que broche (13).
  4. Unité d'injection selon la revendication 1, caractérisée en ce que la broche (13) traverse une ouverture (15) d'un boitier (11) de la chambre de coulée et est raccordée axialement à une tige de piston (16), qui est reliée au piston de coulée.
  5. Unité d'injection selon la revendication 1, caractérisée en ce que la broche (13) est disposée coaxialement par rapport à l'axe des rotors (23, 24) et est guidée extérieurement, d'une manière étanche, dans une ouverture frontale (30) formée dans l'un des rotors (24).
  6. Unité d'injection selon la revendication 1, caractérisée en ce que la longueur axiale de la cavité intérieure des rotors (23, 24) est réglée sur la course maximale de la broche (13) de telle sorte que la partie filetée (14) de la broche (13) reste toujours à l'intérieur du boítier de protection formé par les rotors (23, 24).
  7. Unité d'injection selon l'une des revendications 1 à 6, caractérisée en ce qu'il est prévu une unité de démultiplication insérée entre le moteur électrique (20) et le piston de coulée.
  8. Unité d'injection selon l'une des revendications 1 à 7, caractérisée en ce que le moteur électrique (20) est réalisé sous la forme d'un système d'entraínement à plusieurs étages.
  9. Unité d'injection selon l'une des revendications 1 à 8, caractérisée en ce qu'un refroidissement par eau est prévu pour le moteur électrique (20).
EP94103175A 1993-03-30 1994-03-03 Unité pour enfoncer du métal liquide Expired - Lifetime EP0618025B1 (fr)

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 (fr) 1994-10-05
EP0618025B1 true EP0618025B1 (fr) 1998-05-13

Family

ID=6484228

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94103175A Expired - Lifetime EP0618025B1 (fr) 1993-03-30 1994-03-03 Unité pour enfoncer du métal liquide

Country Status (6)

Country Link
US (1) US5482101A (fr)
EP (1) EP0618025B1 (fr)
JP (1) JP3348958B2 (fr)
AT (1) ATE166010T1 (fr)
DE (2) DE4310310A1 (fr)
ES (1) ES2117163T3 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
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 (fr) * 1999-04-13 2003-08-06 Oskar Frech Gmbh & Co. Machine à couler sous pression à chambre chaude
EP1057560A1 (fr) * 1999-06-01 2000-12-06 Oskar Frech Gmbh & Co. Unité d'injection pour une machine de coulée sous pression
DE50009878D1 (de) * 2000-10-27 2005-04-28 Frech Oskar Gmbh & Co Kg Warmkammerdruckgiessmaschine und Betriebsverfahren hierfür
WO2002085599A1 (fr) * 2001-04-19 2002-10-31 Demag Ergotech Gmbh Machine a mouler par injection a commande electromotrice a broche, et memoire de travail elastique assistant le moteur electrique
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
CN119187513B (zh) * 2024-12-02 2025-03-25 山东鲁电线路器材有限公司 一种液态模锻成型模具

Family Cites Families (7)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
ATE166010T1 (de) 1998-05-15
DE4310310A1 (de) 1994-10-06
US5482101A (en) 1996-01-09
DE59405931D1 (de) 1998-06-18
ES2117163T3 (es) 1998-08-01
JPH0747461A (ja) 1995-02-21
EP0618025A1 (fr) 1994-10-05
JP3348958B2 (ja) 2002-11-20

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