EP0937524A1 - Verfahren zum Entlüften von Druckgiessformen sowie Ventilvorrichtung zur Durchführung des Verfahrens - Google Patents

Verfahren zum Entlüften von Druckgiessformen sowie Ventilvorrichtung zur Durchführung des Verfahrens Download PDF

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Publication number
EP0937524A1
EP0937524A1 EP99810062A EP99810062A EP0937524A1 EP 0937524 A1 EP0937524 A1 EP 0937524A1 EP 99810062 A EP99810062 A EP 99810062A EP 99810062 A EP99810062 A EP 99810062A EP 0937524 A1 EP0937524 A1 EP 0937524A1
Authority
EP
European Patent Office
Prior art keywords
valve
vent
mold cavity
vent valve
valve device
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.)
Withdrawn
Application number
EP99810062A
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German (de)
English (en)
French (fr)
Inventor
Johann Wyser
Heinrich Guth
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.)
Fondarex SA
Original Assignee
Fondarex SA
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 Fondarex SA filed Critical Fondarex SA
Publication of EP0937524A1 publication Critical patent/EP0937524A1/de
Withdrawn legal-status Critical Current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
    • 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
    • B22D17/14—Machines with evacuated die cavity
    • B22D17/145—Venting means therefor

Definitions

  • the invention relates to a method for venting die casting molds according to the Preamble of claim 1 and a valve device for performing the Method according to the preamble of claim 6.
  • the die or the mold cavity of the die be vented during the die casting process. Not only that in the Any voids in the die casting machine and the die can escape can, but it must also be ensured that the gases emerging from the liquid casting compound can also escape.
  • venting die casting molds One problem with venting die casting molds is that Bleed valve should be closed as late as possible to allow the mold cavity as far as possible until it is completely filled, but on the other hand Liquid pouring material should be prevented from entering the vent valve penetrates.
  • valve devices are known the vent valve is operatively connected to a force transducer, of the casting material penetrating from the mold cavity into the ventilation duct is operated. With such valve devices can be very fast and reliable Realize valve devices. To the on the force transducer for the The venting channel shows that it can build up the necessary back pressure Changes in direction and cross-section.
  • the ventilation duct between the force transducer and the actual valve body of the Breather valve have a certain minimum distance and are angled be so that the vent valve is closed before the liquid pouring material reached the vent valve.
  • an angled version of the Vent channel between the force transducer and the vent valve is also prevents the splashes of the Pour the casting compound into the vent valve and plug it. To efficiency It is customary to increase such vent valves on the vent valve a vacuum pump connected.
  • EP 0 612 573 describes a generic valve device for venting Die casting molds known, which have a vent channel, one in the vent channel arranged vent valve and an actuator for Closing the vent valve is provided.
  • the actuator has one Force transducer, which through the from the mold cavity into the ventilation channel penetrating casting material can be acted upon and with the movable Closing part of the vent valve is in a mechanical operative connection.
  • the force transducer is designed as a thrust member, its working stroke on one Fraction of that to be covered by the movable closure part of the vent valve Closing path is limited.
  • the closure part of the vent valve can be moved freely over the working stroke of the force transducer, and the actuator has a power transmission member for the transmission of the shock pulse from the force transducer to the movable closure part of the vent valve.
  • vent valves work very reliably in practice, would be it is particularly desirable for mold cavities with a large volume, if the ventilation performance could be increased.
  • the maximum venting performance is particularly due to the changes in direction and cross-section limited in the ventilation duct, because of this the flow resistance for the gases escaping the mold cavity is increased significantly.
  • venting performance can be considerably increased with the proposed method increase because of a second vent valve, which is before full filling of the mold cavity is closed, on the one hand the average cross section of the for the venting channels can at least be doubled and also the vent duct section leading to the second vent valve in Regarding the flow resistance can be optimized.
  • Another object of the invention is to provide a valve device with which the method according to the invention can advantageously be carried out.
  • valve device which has the characteristics indicated in the license plate of claim 6 features listed.
  • the essential components of the die casting machine are in the present example a pressure chamber 1 and a hydraulically actuated casting piston arranged therein 2 drawn.
  • the pressure chamber 1 is used to fill the liquid casting material provided with a filling opening 4.
  • a die-casting mold 5 is arranged, which consists of two mold halves 5a, 5b.
  • a connecting channel 6 leads from the pressure chamber 1 into the mold cavity 8 Die casting mold 5.
  • the valve device 10 On the top of die casting die 5 is the valve device 10 arranged, which is connected to the mold cavity 8 via a ventilation channel 9 is.
  • the valve device 10 has two vent valves 11, 12, which are connected to a vacuum pump 18 via two connecting lines 14, 15.
  • a check valve A, B is arranged in each of the two connecting lines 14, 15.
  • the right ventilation valve 11 is not visible from this illustration Force transducer in operative connection, which from the mold cavity 8 in the Vent channel 9 penetrating casting material is actuated.
  • the left bleed valve 12 is operated externally, which is indicated by an interrupted line 16 Is indicated, via which the vent valve 12 with a control device 19th connected is.
  • a sensor 17 In order to detect the position of the casting piston 2, there is a sensor 17 provided, which is also connected to the control device 19.
  • Figures 2 to 5 show the die casting machine and the valve device in four different phases.
  • the pressure chamber 1 becomes the liquid via the filling opening 4 Casting material G fed. Then the filling process is started by the piston 2 is shifted to the right in the direction of the die 5. After the Has pushed the piston 2 in front of the filling opening 4 (FIG. 3), the vacuum pump 18 put into operation and the two shut-off valves A and B opened. This allows the gases located in the pressure chamber 1 and in the mold cavity 8 via the both open valves 11, 12 of the valve device 4 escape or suction become.
  • the absolute position of the casting piston 2 because of the Position of the piston 2, the level of the pressure chamber 1 is known or determined can be. Since the filling of the mold cavity 8 with the casting material G in the Usually happens within about 20 to 80 milliseconds, the left vent valve 12 closed before the casting material G entered the mold cavity 8 is. Of course, the left vent valve 12 must be immediately before that Casting material G this can be closed. This is the case if the mold cavity 8 is completely filled and the casting material G in the vent channel penetrates. In this case, however, there is a risk that the actual Pour casting compound G ahead of splash into left vent valve 12 and add this. By closing the left vent valve early 12 this fact is taken into account.
  • An early closing of the left Vent valve 12 also has the advantage that principle-related fluctuations of certain operating variables, for example the one filled into the pressure chamber Volume of the casting material, uncritical in terms of a reliable Operation of the valve device are and also a proportionate simple control can be used. However, the exact time the closing of the vent valve 12 the prevailing general conditions be adjusted.
  • the relative position of the Piston can be used as a criterion for closing the vent valve 12.
  • Other variations are that since the start of the filling process elapsed time, the fill level of the pressure chamber 1 or the fill level of the mold cavity 8 are used, but this list is by no means exhaustive is to be considered.
  • the check valve can also A of the vacuum pump 18 are closed. Which is still in the mold cavity 8 gases can now escape via the right vent valve 11 or suctioned off.
  • the right vent valve 11 remains open as long as until the casting material penetrating into the venting channel 9 comes out of this Representation has not reached visible force transducer. Through the kinetic The force transducer and the valve body generate the energy of the casting material of the right vent valve 12 moved and the latter closed, such as will be explained in more detail below.
  • FIG. 6 shows a plan view of the valve device 10 in a detailed illustration.
  • the ventilation channel leading into the valve device 10 is identified by the reference symbol 9 provided, during which the channel section leading to the first vent valve 11 with the reference numeral 9b and leading to the second vent valve 12 Channel section is provided with the reference number 9a.
  • the second vent valve 12 leading ventilation duct section 9a is straight, so that the flow resistance for the escaping gases is kept as low as possible can be.
  • the to the force transducer 20 and the valve body 30 of the first Ventilation channel section 9b leading ventilation valve 11 is angled.
  • the angled design of the ventilation duct section 9b serves to to intercept the splashes leading the actual casting compound G and the Flow of the casting material after reaching the force transducer 20 in such a way delay that the valve body 30 has reached its closing position in time, before the casting material has reached valve body 30.
  • the force transducer 20 is arranged at the end of a side arm 9c of the channel section 9b.
  • a storage space 9d is provided in the area of the force transducer 20 in which that for the closing movement of the force transducer 20 and that in operative connection with it necessary elements can be built up. in the further two plungers 38, 39 are shown, which are used to tension one of them Representation not visible spring package are provided.
  • Fig. 7 shows a first cross section through the one in the starting position Valve device along the line A-A in Fig. 6, the two plungers 38, 39 for a better understanding of how it works than in a common vertical plane are drawn horizontally.
  • valve body received in a valve channel 34 30 and the two plungers 38, 39 are from this illustration by means of a Spring 25 loaded working piston 24, a poppet valve 27, a drive plate 23, a pressure plate 35 and a spring assembly 36 can be seen.
  • the valve body 30 has a collar 32 which is provided with axial recesses 33, via which the gases from the vent passage portion 9b into one above the valve body 30 arranged outlet channel 41 can reach the vacuum pump connected is.
  • the force transducer 20 has a collar 21 which is in the reverse direction directional movement engages frictionally on the drive plate 23.
  • the Driving plate 23 engages the valve body 30 at the upper end, during this it engages in the working piston 24 at the lower end.
  • the spring assembly 36 On the back side the drive plate 35, the spring assembly 36 is arranged, which by means of Pressure plate 35, the force transducer 20 and the valve body 30 and the working piston 24 Press forward in the starting position shown here. About the the spring plunger becomes the two plungers 38, 39 which penetrate the drive plate 23 freely 36 compressed when installing the valve device 10, so that the force transducer 20 by the kinetic energy of the casting compound can be moved backwards, as will be explained later.
  • the closing path of the force transducer 20 is a fraction of the closing path of the Valve body 30 and the working piston 24 limited. This allows the of the Pouring mass transferred to the moving parts 20, 23, 24, 30 kinetic energy be kept within certain limits.
  • FIG. 8 shows a cross section through the second vent valve 12 of the valve device.
  • This consists essentially of a closing piston 45, one Driving plate 48, a pressure plate 49, two springs 50, 51 and the one in one Valve channel 54 received valve body 52.
  • the movable closing piston 45 is in turn provided with a collar 46 which is non-positively attached to the Driving plate 48 attacks.
  • the drive plate 48 is operatively connected to the valve body 52 by engaging the valve body 52 at the upper end. About the two springs 50, 51, the drive plate 48 together with the Valve body 52 and the closing piston 45 pressed forward.
  • valve body 52 to move from the open to the closed position shown here is about a channel 44 leading to the closing piston 45 is supplied with a pressure medium the end face of the closing piston 45 and this together with the drive plate 48 and the valve body 52 against the spring force moved against an end stop at the rear.
  • the one immersed in the valve channel 54 Head 53 of valve body 52 seals valve channel 54.
  • FIG. 9 shows the cross section taken along the line A-A in FIG valve device built into a die-casting mold consisting of two halves 5a, 5b 10.
  • the spring assembly 36 is on by the two the one half 5b of the die 5, the plungers 38, 39 pressed together.
  • the valve body 30 is under the action of the closing spring 25 of the working piston 24 still in the open position, so that the gases from the Mold cavity via the ventilation channel 9 and the valve channel 34 into the outlet channel 41 can flow, as indicated by arrows 57.
  • the force transducer 20 As soon as the Casting compound has reached the force transducer 20, this is under the force of pouring pouring material suddenly moved to its end stop.
  • the Bund 21 on the force transducer 20 transmits this force pulse to the drive plate 23, which is under the effect of the kinetic mediated by the force transducer 20 Energy takes off from the force transducer 20 after it reaches its end position has, and together with the valve body 30 and the working piston 24 the return force of the closing spring 25 is moved further.
  • the vent valve 11 closed by the head 31 of the valve body 30 in the valve channel 34 dips.
  • the closing movement of the vent valve 11 is supported by the pressure of a pressure medium applied to the working piston 24, which after lifting the working piston 24 from the control valve 27, the entire end face of the working piston 24.
  • the vent valve 11 normally without the support of the working piston 24 can be closed, because the closing movement of the vent valve 11 necessary energy from the mold cavity 8 into the ventilation channel 9 penetrating liquid casting material G is applied.
  • the right half of the die 5b away.
  • the riser is activated by the two under the action of the spring assembly 36 standing plungers 38, 39 ejected.
  • venting performance can be achieved with a valve device 10 configured in this way significantly increase compared to conventional vent valves without the valve device is much larger. Thanks to the two-stage ventilation process, in which one vent valve 12 is closed externally, before the mold cavity 8 is completely filled and in which the other vent valve 11 actuated by the casting material penetrating into the mold cavity 8 reliable operation can also be ensured.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Check Valves (AREA)
EP99810062A 1998-02-19 1999-01-26 Verfahren zum Entlüften von Druckgiessformen sowie Ventilvorrichtung zur Durchführung des Verfahrens Withdrawn EP0937524A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH39998 1998-02-19
CH39998 1998-02-19

Publications (1)

Publication Number Publication Date
EP0937524A1 true EP0937524A1 (de) 1999-08-25

Family

ID=4186142

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99810062A Withdrawn EP0937524A1 (de) 1998-02-19 1999-01-26 Verfahren zum Entlüften von Druckgiessformen sowie Ventilvorrichtung zur Durchführung des Verfahrens

Country Status (11)

Country Link
US (1) US6298903B1 (ko)
EP (1) EP0937524A1 (ko)
JP (1) JPH11320068A (ko)
KR (1) KR19990072745A (ko)
CN (1) CN1096905C (ko)
AU (1) AU750419B2 (ko)
BR (1) BR9900736A (ko)
CA (1) CA2262193C (ko)
PL (1) PL331547A1 (ko)
SK (1) SK21599A3 (ko)
TW (1) TW389710B (ko)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003022489A2 (de) * 2001-09-12 2003-03-20 Alcan Bdw Gmbh & Co. Kg Verfahren zum steuern eines vakuumventils einer vakuumdruckgiessvorrichtung sowie vakuumdruckgiessvorrichtung
EP1516687A1 (de) * 2003-08-25 2005-03-23 Fondarex S.A. Vakuum Druck- oder Spritzgiessmaschine
CN102223027A (zh) * 2011-06-14 2011-10-19 吴江市天龙机械有限公司 一种陀螺仪电机转子铸造工艺
EP3375547A1 (de) * 2017-03-16 2018-09-19 Fondarex S.A. Ventileinrichtung zum entlüften von druckgiessformen

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EP1018384B1 (de) * 1999-01-06 2003-08-13 Fondarex S.A. Ventileinrichtung
CN1093015C (zh) * 2000-08-31 2002-10-23 谭廷清 带有排气通道的压铸模及其模芯间隙参数确定方法
KR20030004001A (ko) * 2001-07-12 2003-01-14 김기동 금형 내 공기빼기시스템
GB0408044D0 (en) * 2004-04-08 2004-05-12 Composite Metal Technology Ltd Liquid pressure forming
CN1322950C (zh) * 2004-08-11 2007-06-27 杨然森 合金铸件的温室低压铸造方法及其铸造机
CN1986110B (zh) * 2005-12-23 2010-11-24 宁波久腾车灯电器有限公司 基站组合件的模具
CN102438772B (zh) * 2009-03-27 2014-05-28 新加坡科技研究局 形成液锻物品的方法和装置
ITMI20110903A1 (it) * 2011-05-20 2012-11-21 Freni Brembo Spa Impianto e metodo per l'iniezione in stampo di alluminio semisolido
CH705077B1 (fr) * 2011-06-09 2016-01-29 V D S Vacuum Diecasting Service S A Dispositif de vanne pour l'évacuation d'air d'un moule.
CN104275457A (zh) * 2013-07-04 2015-01-14 上海乾通汽车附件有限公司 用于电磁阀阀体的压铸系统
CN103934428B (zh) * 2014-03-31 2016-04-20 清华大学 充氧-真空压铸模具装置和充氧-真空压铸工艺
CN104259430B (zh) * 2014-10-21 2016-03-30 湖南航天诚远精密机械有限公司 金属及其合金真空压铸成形装备及方法
CN107020361B (zh) * 2017-04-17 2018-11-16 上海永茂泰汽车零部件有限公司 汽车发动机零部件精密压铸模具
CN107345574B (zh) * 2017-07-31 2023-07-25 上海皮尔博格有色零部件有限公司 一种压铸模具的型腔排气系统
CN110076313B (zh) * 2019-05-05 2021-01-15 广东鸿图武汉压铸有限公司 一种基于真空排气和自然排气一体化的压铸模具
CN112170811A (zh) * 2020-09-21 2021-01-05 滁州市共赢汽车配件有限公司 一种离合器压盘盖挤压铸造设备
CN112453345A (zh) * 2020-11-05 2021-03-09 东莞市兴茂压铸有限公司 一种用于制备铝合金压铸件的压铸系统及压铸工艺
EP4219043A1 (en) * 2022-01-26 2023-08-02 Fundación Azterlan Vacuum pressure process and apparatus for high pressure die casting
CN114628741B (zh) * 2022-03-15 2023-10-13 山东国创燃料电池技术创新中心有限公司 一种燃料电池发动机的加水排气的测试方法及测试装置
CN117680649B (zh) * 2023-12-29 2024-07-23 南京航空航天大学 一种减压铸造成形装置以及减压铸造方法

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JPS63174772A (ja) * 1987-01-13 1988-07-19 Nerima Kogyo:Kk 真空ダイカスト鋳造方法およびその装置
DE3730837A1 (de) * 1987-06-05 1989-03-23 Toshiba Machine Co Ltd Entlueftungseinrichtung fuer giessanlagen
EP0560589A1 (en) * 1992-03-13 1993-09-15 Ryobi Ltd. Laminar flow injection moulding apparatus and laminar flow injection moulding method
EP0612573A2 (de) * 1993-02-02 1994-08-31 FONDAREX, F. HODLER & CIE. S.A. Ventileinrichtung zum Entlüften von Druckgiessformen
JPH0899164A (ja) * 1994-09-28 1996-04-16 Olympus Optical Co Ltd ダイカスト金型

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JPS6029583B2 (ja) * 1981-12-28 1985-07-11 宇部興産株式会社 ダイカスト装置
JPH0815648B2 (ja) * 1987-09-03 1996-02-21 東洋機械金属株式会社 真空ダイカストマシンの運転方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63174772A (ja) * 1987-01-13 1988-07-19 Nerima Kogyo:Kk 真空ダイカスト鋳造方法およびその装置
DE3730837A1 (de) * 1987-06-05 1989-03-23 Toshiba Machine Co Ltd Entlueftungseinrichtung fuer giessanlagen
EP0560589A1 (en) * 1992-03-13 1993-09-15 Ryobi Ltd. Laminar flow injection moulding apparatus and laminar flow injection moulding method
EP0612573A2 (de) * 1993-02-02 1994-08-31 FONDAREX, F. HODLER & CIE. S.A. Ventileinrichtung zum Entlüften von Druckgiessformen
JPH0899164A (ja) * 1994-09-28 1996-04-16 Olympus Optical Co Ltd ダイカスト金型

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Title
PATENT ABSTRACTS OF JAPAN vol. 012, no. 442 (M - 766) 21 November 1988 (1988-11-21) *
PATENT ABSTRACTS OF JAPAN vol. 096, no. 008 30 August 1996 (1996-08-30) *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003022489A2 (de) * 2001-09-12 2003-03-20 Alcan Bdw Gmbh & Co. Kg Verfahren zum steuern eines vakuumventils einer vakuumdruckgiessvorrichtung sowie vakuumdruckgiessvorrichtung
DE10144945A1 (de) * 2001-09-12 2003-04-10 Alcan Bdw Gmbh & Co Kg Verfahren zum Steuern eines Vakuumventils einer Vakuumdruckgießvorrichtung sowie Vakuumdruckgießvorrichtung
WO2003022489A3 (de) * 2001-09-12 2003-08-07 Alcan Bdw Gmbh & Co Kg Verfahren zum steuern eines vakuumventils einer vakuumdruckgiessvorrichtung sowie vakuumdruckgiessvorrichtung
DE10144945B4 (de) * 2001-09-12 2005-05-04 Alcan Bdw Gmbh & Co. Kg Verfahren zum Steuern eines Vakuumventils einer Vakuumdruckgießvorrichtung sowie Vakuumdruckgießvorrichtung
US6948549B2 (en) 2001-09-12 2005-09-27 Alcan Bdw Gmbh & Co. Kg Method for controlling a vacuum valve of a vacuum die casting device and a vacuum die casting device
EP1516687A1 (de) * 2003-08-25 2005-03-23 Fondarex S.A. Vakuum Druck- oder Spritzgiessmaschine
CN102223027A (zh) * 2011-06-14 2011-10-19 吴江市天龙机械有限公司 一种陀螺仪电机转子铸造工艺
EP3375547A1 (de) * 2017-03-16 2018-09-19 Fondarex S.A. Ventileinrichtung zum entlüften von druckgiessformen

Also Published As

Publication number Publication date
CN1096905C (zh) 2002-12-25
BR9900736A (pt) 1999-12-21
JPH11320068A (ja) 1999-11-24
CA2262193A1 (en) 1999-08-19
CN1229015A (zh) 1999-09-22
AU750419B2 (en) 2002-07-18
KR19990072745A (ko) 1999-09-27
SK21599A3 (en) 1999-10-08
AU1547499A (en) 1999-09-02
CA2262193C (en) 2004-01-20
PL331547A1 (en) 1999-08-30
TW389710B (en) 2000-05-11
US6298903B1 (en) 2001-10-09

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