EP0809555B1 - Verfahren und vorrichtung zur trennmittelregelung in einer druckgiessmaschine - Google Patents

Verfahren und vorrichtung zur trennmittelregelung in einer druckgiessmaschine Download PDF

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Publication number
EP0809555B1
EP0809555B1 EP96901853A EP96901853A EP0809555B1 EP 0809555 B1 EP0809555 B1 EP 0809555B1 EP 96901853 A EP96901853 A EP 96901853A EP 96901853 A EP96901853 A EP 96901853A EP 0809555 B1 EP0809555 B1 EP 0809555B1
Authority
EP
European Patent Office
Prior art keywords
pressure
dressing
cylinder
function
value
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
EP96901853A
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English (en)
French (fr)
Other versions
EP0809555A1 (de
Inventor
Patrick Hairy
Michel Richard
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.)
Centre Technique des Industries de la Fonderie
Original Assignee
Centre Technique des Industries de la Fonderie
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Publication of EP0809555A1 publication Critical patent/EP0809555A1/de
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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
    • B22D17/2007—Methods or apparatus for cleaning or lubricating moulds
    • 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
    • B22D17/32—Controlling equipment

Definitions

  • the subject of the present invention is a method and a device for control of poteyage means in an under molding installation pressure of metals or metal alloys.
  • the present invention relates, in a die-casting installation for metals or alloys metal, a device that allows to control, that is to say to optimize, the spreading of poteyage liquid on the internal faces of the mold used to carry out the molding operation.
  • the installation essentially comprises a mold 12 consisting of two parts respectively mobile 14 and fixed 16, including part of the internal faces 14a and 16a respectively define the mold cavity or cavity 18.
  • the mold is closed, the alloy to be molded is introduced into a container 20 and injected under pressure in the cavity 18 by a piston system 22. This is what which is shown in Figures 1a and 1b.
  • the movable part 14 of the mold is discarded.
  • part 14 of the rods such as 26 which are slidably mounted in part 14 of the mold. These rods are controlled simultaneously by a cylinder not shown in the figures.
  • a poteyage operation using a ramp poteyage 28 which allows spraying on the internal faces 14a and 16a a coating liquid forming a film on these faces.
  • the ramp can be stationary during the spraying stage or be animated by back and forth movement. It has a number of nozzles spray.
  • poteyage products in particular poteyage products based on solvents or water-dilutable cleaners. These products of poteyage in themselves are well known.
  • Another object of the invention is to provide a device for control that automatically changes the composition or the flow rate of the cleaning product as a function of the actual conditions of molding.
  • Yet another object of the invention is to provide a device which allows an alarm to be triggered if the conditions for ejecting the molded part come out of normal operating conditions.
  • the means of control of coating in a metal die casting installation or of metal alloys comprising a fixed part of mold and a movable part of a mold defining an imprint, means for ejecting the molded part comprising ejection rods whose movements are controlled by a cylinder supplied with liquid and a spray bar for spraying the product on the internal faces of the parts of the mold defining the imprint, and means for supplying said ramp with poteyage products
  • said control device comprises a single pressure sensor to continuously measure fluid pressure control means in said cylinder, means for recording said pressure as a function of time during the part ejection cycle, and means for comparing said recorded curve with a curve of reference including means for detecting in the recorded curve an overpressure bearing (B) and means for comparing the value of the pressure of said bearing at a minimum value (Pm) and at a value maximum (Pm) and means for modifying said spraying of poteyage product based on the results of said comparison.
  • B overpressure bearing
  • Pm minimum value
  • the principle of the invention is to detect the force that the cylinder must exert to carry out the ejection operation the molded part. Indeed, the inventors have demonstrated that the quality and efficiency of the poteyage operation were inversely proportional to the effort that the ejection rods had to exert to eject the part from the mold imprint. We understand that it is so possible using this pressure variation report to act on feeding the potage ramp to optimize the effect of poteyage.
  • the device for control further comprises means for comparing the curve of pressure measured at maximum pressure and means for trigger an alarm if the pressure measured is greater than the maximum pressure.
  • the device further comprises means for modifying the supply of the ramp with product of poteyage according to the comparison between the pressure curve measured and the reference curve.
  • the adaptation of the coating parameters is done automatically by function of the difference between the measured pressure curve in the ejector control cylinder and an optimal pressure curve.
  • the invention also relates to a method for controlling poteyage means which is characterized in that one measures during all the duration of an ejection cycle for different values of the same setting parameter the maximum pressure of the control fluid said actuator, the variations are recorded using a single sensor of the fluid pressure in the cylinder as a function of time and we retain as maximum pressure that which corresponds to a level (B) of maximum pressure in the curve representative of the variations of pressure as a function of time and in that the value of the parameter corresponding to the lowest maximum pressure value.
  • FIG. 2a we will describe a first embodiment of the system control device poteyage.
  • the two parts 14 and 16 of the mold as well as a molded part 24.
  • the ejector rods 26 which are mechanically connected to rod 30 of a control cylinder 32.
  • the cylinder 32 is supplied with control fluid via inputs 34 and 36.
  • a pressure sensor 38 is permanently mounted on the cylinder 32 to measure the prevailing pressure in the control cylinder.
  • the sensor 38 which can be of any type suitable provides an analog signal which is converted into a digital information possibly by the converter 40.
  • a processing circuit 42 makes it possible to record and memorize the different pressure values as a function of time during a whole ejection cycle.
  • the corresponding curve can be displayed on a control monitor such as 44.
  • the processing circuit 42 comprises also means of comparison which will be explained later.
  • the ramp mobile poteyage 28 which is supplied from a reservoir of poteyage liquid 46 via one or more control valves 48.
  • the time t represents the pressure P measured by the sensor 38.
  • the pressure curve presents a first pressure peak A which corresponds to the arrival of oil from control in the cylinder. This peak is not significant of the efforts ejection.
  • control device allows for each operation to check whether the pressure value maximum does not increase from the defined optimal value previously. In this case, a modification of the coating parameters as indicated previously.
  • the device can continuously compare the maximum pressure corresponding to stage B at a minimum pressure Pm value permissible and at a maximum permissible pressure value PM. If the maximum measured pressure value exceeds the pressure range between Pm and PM, the processing circuit 42 triggers a circuit alarm 50 which can feed a visual alarm on the monitor 44 or an audible alarm 52. It is understood that, in this mode of embodiment, the control device also allows monitoring of the effective functioning of the mold ejection system.
  • the processing circuit 42 includes means for comparing the maximum pressure of the control liquid corresponding to tray B with a value of instructions. If a deviation greater than a predetermined value is detected, the processing circuit 42 activates a control circuit 60 which allows order the modification of certain spraying parameters poteyage liquid.
  • the control circuit 60 controls the ramp control valve 48 for the ramp 28 of poteyage and for example a supply line 62 in solvent for poteyage product in container 46.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Casting Devices For Molds (AREA)
  • Spray Control Apparatus (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Nozzles (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Coating Apparatus (AREA)
  • Hydroponics (AREA)
  • Fertilizers (AREA)

Claims (5)

  1. Vorrichtung zur Trennmittelregelung in einer Druckgießmaschine für Metalle oder Metallegierungen, wobei die Druckgießmaschine versehen ist mit einem die Gußform (18) definierenden festen (16) und einem beweglichen Formteil (14), Gußstücksausstoßvorrichtungen, die Ausstoßbolzen (26) aufweisen, deren Bewegungen von einem Kolbenzylinder (32) gesteuert werden, welcher mit Steuerungsflüssigkeit versorgt wird, einer Trennmittelpulverisierungsvorrichtung (28) für die Innenseiten der die Gußform bestimmenden Formteile und Trennmittelzufuhrvorrichtungen (46, 48) für die Trennmittelpulverisierungsvorrichtung, dadurch gekennzeichnet, daß die Regelungsvorrichtung versehen ist mit einem einzigen Druckmesser (38) zur ständigen Druckmessung der Steuerungsflüssigkeit im Kolbenzylinder (32), Mittel (42) zur Aufzeichnung des Drucks als Funktion der Zeit während des Ejektionszyklus des Gußteils, und Mittel zum Vergleich der aufgezeichneten Kurve mit einer Bezugskurve, die Mittel aufweisen zur Ermittlung einer Hochdruckphase (B) in der aufgezeichneten Kurve und Mittel zum Vergleich der Druckwerte dieser Phase mit einem Minimalwert (Pm) und einem Maximalwert (PM), und Mittel (46, 48) zur Abänderung der Trennmittelpulverisierung in Abhängigkeit der Vergleichsergebnisse.
  2. Vorrichtung zur Trennmittelregelung nach Anspruch 1, dadurch gekennzeichnet, daß diese Vorrichtung zusätzlich über Mittel (50) verfügt, mit welchen unter Bezugnahme auf den Vergleich ein Alarm (52) ausgelöst werden kann, falls der gemessene Druck nicht innerhalb der Werte (Pm) und (PM) liegt.
  3. Vorrichtung zur Trennmittelregelung nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß die Vorrichtung Mittel (42, 60) aufweist, um die Trennmittelzufuhr der Pulverisierungsvorrichtung dem Vergleich zwischen der gemessenen Druckkurve und der Bezugsdruckkurve entsprechend abzuändern.
  4. Verfahren zur Trennmittelregelung in einer Druckgießmaschine für Metalle oder Metallegierungen, wobei diese Vorrichtung versehen ist mit einem die Form (18) bestimmenden festen (16) und einem beweglichen Formteil (14), Gußstückausstoßvorrichtungen, welche Ausstoßbolzen (26) aufweisen, deren Bewegung von einem Kolbenzylinder (32) gesteuert wird, welcher mit Steuerungsflüssigkeit versorgt wird, mindestens einer Trennmittelpulverisierungsvorrichtung (28) für die Innenseiten der die Gußform bestimmenden Formteile, und Trennmittelzufuhrvorrichtungen (46, 48) für die Pulverisierungsvorrichtung, dadurch gekennzeichnet, daß Maximaldruckmessungen der Steuerungsflüssigkeit des Kolbenzylinders während eines gesamten Ejektionszyklus für verschiedene Werte desselben Trennmittelparameters vorgenommen werden, daß mit Hilfe eines einzigen Druckmessers die Druckschwankungen der Flüssigkeit im Kolbenzylinder als Funktion der Zeit aufgezeichnet werden, daß als Maximaldruck der einer Maximaldruckphase (B) in der Bezugskurve der Druckschwankungen als Funktion der Zeit entsprechende Wert ermittelt wird und daß der Parameterwert ausgewählt wird, der dem niedrigsten Wert des Maximaldrucks entspricht.
  5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß zur Ermittlung des Maximaldrucks der Steuerungsflüssigkeit des Kolbenzylinders mit Hilfe eines einzigen Druckmessers die Druckschwankungen der Flüssigkeit im Kolbenzylinder als Funktion der Zeit aufgezeichnet werden und als Maximaldruck der einer Maximaldruckphase (B) in der Bezugskurve der Druckschwankungen als Funktion der Zeit entsprechende Wert festgelegt wird.
EP96901853A 1995-01-26 1996-01-25 Verfahren und vorrichtung zur trennmittelregelung in einer druckgiessmaschine Expired - Lifetime EP0809555B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR9500876 1995-01-26
FR9500876A FR2729876B1 (fr) 1995-01-26 1995-01-26 Procede et dispositif de controle des moyens de poteyage dans une installation de moulage
PCT/FR1996/000126 WO1996022852A1 (fr) 1995-01-26 1996-01-25 Procede et dispositif de controle des moyens de poteyage dans une installation de moulage
CA002209779A CA2209779A1 (fr) 1995-01-26 1997-07-07 Procede et dispositif de controle des moyens de poteyage dans une installation de moulage

Publications (2)

Publication Number Publication Date
EP0809555A1 EP0809555A1 (de) 1997-12-03
EP0809555B1 true EP0809555B1 (de) 1999-04-14

Family

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Family Applications (1)

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EP96901853A Expired - Lifetime EP0809555B1 (de) 1995-01-26 1996-01-25 Verfahren und vorrichtung zur trennmittelregelung in einer druckgiessmaschine

Country Status (8)

Country Link
US (1) US6073676A (de)
EP (1) EP0809555B1 (de)
JP (1) JPH10512810A (de)
AT (1) ATE178821T1 (de)
CA (1) CA2209779A1 (de)
DE (1) DE69602083D1 (de)
FR (1) FR2729876B1 (de)
WO (1) WO1996022852A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7515018B2 (en) 2006-08-31 2009-04-07 Martin Handtmann Acoustic resonator

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19810032A1 (de) * 1998-03-09 1999-09-16 Acheson Ind Inc Verfahren und Vorrichtung zum Vorbereiten der Formwandungen einer Form zur Urformung bzw. Umformung auf den nächstfolgenden Formungszyklus, Sprühelement mit Zentrifugalzerstäubung und Luftführung und Verwendung eines derartigen Sprühelements zum Versprühen im wesentlichen lösungsmittelfreien Formwandbehandlungsmittels
DE10026338B4 (de) * 2000-05-26 2004-06-09 Daimlerchrysler Ag Verfahren zur Beschichtung eines metallischen Bauteils
US6830200B1 (en) * 2001-07-31 2004-12-14 Honda Motor Co., Ltd. Mold spraying system
JP4866083B2 (ja) * 2005-12-26 2012-02-01 東芝機械株式会社 ダイカストマシンにおける離型剤のスプレイ方法及びその装置
FR2976208B1 (fr) 2011-06-09 2014-02-28 Univ Joseph Fourier Procede de demoulage d'une piece et machine de moulage
RU2748255C2 (ru) 2016-10-18 2021-05-21 ЭКОЛАБ ЮЭсЭй ИНК. Устройство для отделения воды и твердых частиц распыляемой воды в машине непрерывного литья и способ непрерывного контроля и управления коррозионным фоном
AT520032B1 (de) * 2017-06-07 2019-02-15 Engel Austria Gmbh Formgebungsmaschine zum Herstellen von faserverstärkten Formteilen

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
JPS60124454A (ja) * 1983-12-09 1985-07-03 Nippon Light Metal Co Ltd 焼付き検知制御装置付ダイカスト機
JPS60221164A (ja) * 1984-04-18 1985-11-05 Mazda Motor Corp 加圧鋳造装置
SU1243893A1 (ru) * 1984-12-18 1986-07-15 Предприятие П/Я Ж-1287 Способ смазки форм лить под давлением и установка дл его осуществлени
SU1533830A1 (ru) * 1988-04-01 1990-01-07 Киевский институт автоматики им.ХХУ съезда КПСС Способ управлени машиной лить под давлением и устройство дл его осуществлени
JPH0623508A (ja) * 1992-04-15 1994-02-01 Ryobi Ltd 金型内圧力測定装置
JP2777863B2 (ja) * 1992-12-28 1998-07-23 リョービ株式会社 ダイカスト製品押出し異常の検出方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7515018B2 (en) 2006-08-31 2009-04-07 Martin Handtmann Acoustic resonator

Also Published As

Publication number Publication date
WO1996022852A1 (fr) 1996-08-01
DE69602083D1 (de) 1999-05-20
FR2729876A1 (fr) 1996-08-02
CA2209779A1 (fr) 1999-01-07
FR2729876B1 (fr) 1997-04-18
ATE178821T1 (de) 1999-04-15
JPH10512810A (ja) 1998-12-08
US6073676A (en) 2000-06-13
EP0809555A1 (de) 1997-12-03

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