EP1836013A2 - Unit de coulée hydraulique et procédé de commande associé - Google Patents

Unit de coulée hydraulique et procédé de commande associé

Info

Publication number
EP1836013A2
EP1836013A2 EP05802781A EP05802781A EP1836013A2 EP 1836013 A2 EP1836013 A2 EP 1836013A2 EP 05802781 A EP05802781 A EP 05802781A EP 05802781 A EP05802781 A EP 05802781A EP 1836013 A2 EP1836013 A2 EP 1836013A2
Authority
EP
European Patent Office
Prior art keywords
pressure
casting
valve
cylinder
casting unit
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Withdrawn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
EP05802781A
Other languages
German (de)
English (en)
Inventor
Dirk Herold
Holger Engert
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.)
Bosch Rexroth AG
Original Assignee
Bosch Rexroth AG
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
Priority claimed from DE102005034202A external-priority patent/DE102005034202A1/de
Priority claimed from DE102005036060A external-priority patent/DE102005036060A1/de
Application filed by Bosch Rexroth AG filed Critical Bosch Rexroth AG
Publication of EP1836013A2 publication Critical patent/EP1836013A2/fr
Withdrawn legal-status Critical Current

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
    • B29C45/76—Measuring, controlling or regulating
    • B29C45/82—Hydraulic or pneumatic circuits
    • 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
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76494—Controlled parameter
    • B29C2945/76498—Pressure
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76494—Controlled parameter
    • B29C2945/76545—Flow rate
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76494—Controlled parameter
    • B29C2945/76595—Velocity
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76655—Location of control
    • B29C2945/76775—Fluids
    • B29C2945/76785—Fluids hydraulic fluids
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76929—Controlling method
    • B29C2945/76956—Proportional

Definitions

  • the invention relates to a hydraulically operated casting unit according to the preamble of patent claim 1 and a method for driving such a casting unit.
  • Casting units are used in die casting machines (cold chamber machines, hot chamber machines), tixomoulding, plastic injection molding machines or similar machines in which a molten or doughy molding material has to be introduced into a cavity of a mold.
  • the casting process can be subdivided into three main phases, with the molten or doughy molding material being introduced into a casting bushing in a first prefilling phase and then being displaced comparatively slowly in the direction of the gate of the mold. In this case, the molding mass movement should be done slowly and smoothly at low speed.
  • the filling of the cavity then takes place during the molding phase in which the molding compound is pressed into the mold at a comparatively high flow rate.
  • No. 5,622,217 shows a casting unit of a pressure casting machine in which pressure is applied to the molding composition by means of a casting cylinder.
  • the casting cylinder is controlled via a hydraulic control valve arrangement, via which a cylinder space effective in the extension direction of the casting cylinder during the first two phases (prefilling phase, mold filling phase) with the pressure in a low-pressure accumulator and during the holding pressure phase with the pressure in a high-pressure accumulator is connectable.
  • the Ausfahrgeschwindig ⁇ speed of the casting cylinder is controlled on the drain side via a control valve, which opens a connection to the tank or.
  • pre-compression pressure multipliers are used, with which the counter-pressure on the Stan ⁇ genseite is set.
  • these require a considerable expenditure on equipment and it has been found that with such a solution the speed ability of the casting cylinder is not controllable with the required accuracy.
  • the invention has the object zugrun ⁇ de to provide a hydraulically actuated casting unit and a Ver ⁇ drive to provide their control in which a jerk-free start with little device-technical effort is feasible.
  • a volume flow control of the pressure medium volume flow to the bottom side of the casting cylinder takes place, so that its extension speed and thus the acceleration of the melt in the direction of the mold gate are very precisely controlled.
  • the backpressure in the annular space of the casting cylinder is adjusted via a throttle valve arrangement, which is arranged in the pressure medium flow path between the annular space and a tank or other pressure medium valley.
  • the volume flow control of the pressure medium to the bottom side (cylinder space) follows the casting cylinder via a regulated variable displacement pump.
  • a - preferably pre-controlled - low-pressure shut-off valve In its non-return function in the closing direction, this is acted upon by the pressure in the cylinder chamber and in the opening direction by the low pressure.
  • a comparatively low counterpressure is initially set during the startup and during the process of the casting cylinder in order to reduce the energy consumption and the pressure drop across the throttle valve arrangement in the pressure medium flow path between the annular space and the pressure medium sink is small to keep.
  • the counter-pressure during the changeover to the mold filling phase is initially adjusted so that the LP shut-off valve is still kept closed against the pressure in the low-pressure accumulator.
  • the pressurization of the casting cylinder with low pressure then takes place by rapidly controlling the throttle valve arrangement, so that the pressure in the annular space decreases correspondingly quickly and the LP shut-off valve opens the connection between the cylinder space of the casting cylinder and the low-pressure accumulator.
  • the throttle valve arrangement is opened relatively quickly to initiation of the mold filling phase and the connection from the low-pressure accumulator to the cylinder space of the casting cylinder is simultaneously controlled via the LP shut-off valve. That is, in this variant, virtually the control of the throttle valve arrangement is switched from pressure to speed control.
  • the throttle valve arrangement is already further opened during the transition from the pre-charge phase to the mold filling phase due to the lower pressure gradient than in the previously described concept and can thus be opened substantially more quickly.
  • This variant also makes it possible to use the throttle valve arrangement instead of a servo pilot valve use a proportional pilot valve.
  • the throttle valve arrangement can be designed as a continuously adjustable seat valve with blocking position, which can be executed with or without fine control edge.
  • the hydraulic circuit diagram ei ⁇ ner casting unit 1 of a die casting machine is shown.
  • the casting unit 1 has a casting cylinder 2, the piston 4 actuates a guided in a casting sleeve, not shown casting piston.
  • the molten molding material is introduced into this casting box or filling chamber and then moved by axial advance of the casting piston in the direction of a mold so that it is filled with melt during the mold filling phase described above and the melt absorbed in the mold is compressed during the holding pressure phase and possible shrinkage is compensated.
  • the pressure means normally used in such pressure casting machines are HFC fluids which consist of a solution of polymers in water and are classified as flame retardant. These aqueous solutions cause problems, particularly with regard to the pumps, with regard to the shaft seal, so that they have an increased wear. In addition, cavitations may occur in such pressure media, which further increase the wear.
  • the Applicant has developed a high-pressure pump, by means of which pressures in the range required for die-casting machines can be applied up to 450 bar even in the case of HFC liquids.
  • FIG. 1 The control of the casting cylinder via the control arrangement shown in Figure 1, which consists essentially of a directional control valve 10, a back pressure valve 12, a throttle valve 14, a LP shut-off valve 20, a high-pressure control valve 22, a directional seat switching valve 24, an LP loading valve 26th , an HP charging valve 28, an LP pressure relief valve 30 and an HP pressure relief valve 32.
  • Pressure medium is sucked from a tank T via the volume-flow-controlled variable displacement pump 6 and conveyed into a pressure line 34, which is connected to an input port A of the directional control valve 10 designed as a directional seated switching valve. This is biased by a spring in its illustrated locking position. By actuating the feedforward control of the directional control valve 10, this can be switched to a switching position in which a pressure medium flow from the input connection A to a working connection B is made possible and blocked in the opposite direction.
  • This working port B is connected via a working line 36 to a bottom-side cylinder chamber 38 of the casting cylinder 2.
  • This cylinder chamber 38 is connected via an LP line 40 to an input terminal A of the LP blocking valve 20, whose working connection B is connected by means of an LP storage line 42 is connected to the low-pressure accumulator ND.
  • a line 44 in which the Wegesitzschaltventil 24 is arranged, which is biased by a spring assembly in its blocking position and in a passage position is bring ⁇ bar, in which the conduit 44 is connected to the tank T. in order, for example, to allow decompression of the cylinder space 38.
  • the LP shut-off valve 20 is designed as a pilot-operated logic valve, wherein a 2-way cartridge valve 46 is provided with a control cover (not shown) which carries a pilot valve 48, which is designed as a 4/2-way valve in the illustrated embodiment.
  • the cartridge valve 46 has a stepped piston, which is designed with a surface difference and which is biased by a spring against a seat.
  • the istn ⁇ piston 50 is designed with a through hole, via which the pressure in the LP line 40 also in a spring chamber 54 of the cartridge valve 46 abuts.
  • An annular end face 56 of the stepped piston 50, which is effective in the opening direction, can be acted upon by the pilot valve 48 with an opening pressure, which is tapped off via a pilot line 58 at a connection T of the pilot control valve 48.
  • this has a shut-off connection P and two working connections A, B, one working connection B via a tank line 60 to the tank T and the other working connection A via an LP control line 62 to the LP Memory line 42 is connected.
  • the connection T In its spring-biased basic position, the connection T is connected to the connection B, so that the ring end face 56, which is effective in the opening direction, acts on the tank pressure. is beating.
  • the cartridge valve 46 In the spring-biased basic position of the pilot valve 48, the cartridge valve 46 is locked by the force of the spring and acting in the closing direction pressure in the LP line 40.
  • the pilot valve 48 By switching the pilot valve 48 to its switching position, the working port A is connected to the port T, so that the annular end face 50 is acted upon by the low pressure.
  • the smaller Stirnflä ⁇ surface of the stepped piston 50 is acted upon by the pressure in the LP line 40, the the spring chamber 54 bounding the rearward larger end face is subjected to the same pressure, so that the ring end face 56 corresponding, acting in the closing direction surface difference with the pressure in the LP line 40 is acted upon.
  • the cartridge valve 46 may be opened when the pressure in the LP conduit 40 and the pressure equivalent of the spring is less than or equal to the low pressure ND acting on the annular end surface 56.
  • the basic structure of such installation valves 20 is known, so that it is possible to dispense with further embodiments with reference to spielnem the data sheet RD 21 010 / 11.98 of the applicant.
  • the cartridge valve 20 works for a pressure medium flow from B to A like a check valve.
  • the cartridge valve 20 is switched even when umge ⁇ switched pilot valve 48 in its blocking position.
  • a check valve can also be used, as described in the applicant's application DE 10 2004 061 562.
  • LP charging line 64 From the pressure line 34 branches off an LP charging line 64, in which the designed as Wegesitzschaltventil ND Storage charging valve 26 is arranged. This is biased by a spring assembly in its illustrated blocking position and can be switched to a through position in which a flow of pressure medium from a port A to a port B allows and is locked in Gegen ⁇ direction, so that the ND charging line 64 via the ND Accumulator charging valve 26 is connected to a ND charging line 66 opening into the ND storage line 42. The pressure in the ND storage line and the ND charging channel 66 is limited via the LP pressure relief valve 30.
  • an HD memory line 68 in which the HD control valve 22 is arranged.
  • This is designed as a continuously adjustable Wegesitzventil and can be proportionally alsuben Kunststoffn from a locked position to open a connection between the HP storage line 68 and connected to the high-pressure accumulator HD HD channel 70, so that the bottom side of the casting cylinder 2 in the Nachbuchphase with High pressure can be acted upon.
  • An annular space 71 of the casting cylinder 2 can be connected to the tank T via a drain line 72 and the continuously adjustable throttle valve 14.
  • the pressure line 34 From the pressure line 34 further branches off an HD charging line 74, which leads to a port A of the HD Spei ⁇ cherladeventils 28 whose other terminal B is connected by means of an HD charging channel 76 to the high-pressure accumulator HD.
  • the high-pressure accumulator is protected by the HD pressure relief valve 32.
  • the HD storage Deventil 28 has the same structure as the LP storage loading valve 26 and can be brought from a spring biased locking position in a passage position in which a pressure fluid flow for loading the high-pressure accumulator from the HD charging line 74 to the HD charging channel 76 is enabled.
  • variable displacement pump 6 is designed so that the high-pressure accumulator can be charged up to 450 bar in the area required for die casting machines. In principle, however, a separate high-pressure pump for charging the high-pressure accumulator HD and a separate pump for charging the low-pressure accumulator ND could also be provided.
  • the illustrated embodiment branches from the HD charging line 74 from a back pressure line 78, in which the back pressure valve 12 is arranged, the zip in the Prin ⁇ the same structure as the two aforementioned charging valves 26, 28 has. It is biased into a blocking position and can be a passage position um ⁇ switch, in which a flow of pressure medium from the HD charging line 74 to the annulus 72 is made possible, so that for example the piston 4 can be retracted.
  • the piston 4 of the casting cylinder 2 should initially travel relatively slowly during the prefilling phase and be accelerated without jerk to a comparatively low speed and then be moved at a constant low speed or in accordance with a speed profile.
  • the piston is then accelerated in a short time (about 10 ms) almost to its maximum speed and then again be slowed down. In between, a track can be at a constant high speed.
  • the holding pressure phase in which the piston travels only a comparatively small residual stroke, but at the same time is subjected to the maximum pressure (400-450 bar). After complete filling and after expiration of the holding pressure phase, the piston is moved back to its original position.
  • the casting cylinder 2 is approached pressure-free in the inlet control, then accelerated and the melt is pushed with a velocity profile to the forming section.
  • the variable displacement pump 6 controls the speed.
  • the throttle valve 14 By suitable control of the throttle valve 14 in the course of the casting cylinder 2, the back pressure is regulated.
  • a comparatively low back pressure for example 30-50 bar
  • the pressure in the annular space 71 of the casting cylinder 2 is increased by reducing the opening cross-section of the throttle valve 14 in the drain line 72 such that a pressure in the cylinder chamber 38 which is somewhat higher than the pressure in the low-pressure accumulator ND (for example, 150 bar).
  • the pilot valve 48 is switched against the force of its spring, so that the annular end surface 56 is acted upon by low pressure.
  • the Einbauven ⁇ valve 20 is still closed by its non-return function, so that no jerking occurs by switching to low pressure.
  • the throttle valve 14 in the drain line 72 is relatively quickly opened (torn open) so that the pressure in the annular space 71 drops rapidly and also the pressure in the cylinder chamber 38 and the LP line 40 sags under the low pressure and the cartridge valve 46 opens, so that in the cylinder chamber 38 is applied low pressure and the casting cylinder 2 is accelerated and extends at high Geschwin ⁇ speed.
  • the throttle valve 14 can be used with or without a fine control edge.
  • the pressure in the cylinder chamber 38 for initiating the mold filling phase does not have to be increased slightly above the low pressure, as in the previously described variant.
  • the jerk-free changeover is achieved in that the LP shut-off valve 20 is opened by switching the pilot valve 48 and at the same time the throttle valve 14 in the Weglei ⁇ device 72 is opened, so that practically with respect to the throttle valve 14 of a pressure in a Geschwin ⁇ dtechniksregelung is switched. Because the throttle valve 14 is already opened further during the transition from the prefilling phase to the mold filling phase due to the low pressure gradient than in the previously described control concept, it can be brought much more quickly into its opening position. In principle, instead of a servo pilot valve for the throttle valve 14, a simpler proportional pilot valve can be used.
  • the mold In the mold filling phase, the mold is filled at high flow rate. In the subsequent post-pressure phase, the melt is compressed into the last cavity of the mold with high pressure and the material shrinkage is compensated. In this case, the high-pressure control valve 22 is opened and the LP shut-off valve 20 is closed as quickly as possible, so that the piston 4 is subjected to high pressure for recompressing the melt. The closing of the LP check valve 20 is assisted by the high pressure in the LP line.
  • the decompression in the cylinder chamber 68 and the retraction of the piston 4 is effected by opening the Wegesitzschaltven- tils 24 and the back pressure valve 12 - the caster is ready for the next cycle.
  • the charging of the two memories HD, ND is effected in each case by means of the variable displacement pump 6, wherein the high-pressure accumulator HD is charged with the high-pressure accumulator 28 and the low-pressure accumulator ND is charged with the low-pressure accumulator valve 26 in order to charge the high-pressure accumulator HD Return position is switched.
  • the maximum pressure of the two memories HD, ND is limited by the associated pressure limiting valves 32 and 30, respectively.
  • variable displacement pump 6 is used to regulate the pressure medium volume flow to the casting cylinder in the prefilling phase and to fill the two memories HD, ND.
  • the pressure medium volume flow can also be impressed in other ways.
  • pressure translators or the like can also be used instead of the two memories HD, ND.
  • a hydraulically actuated casting unit with a casting cylinder the cylinder chamber in the extension direction is supplied with pressure medium during a Vorhellphase via a volume flow control unit, wherein an effective in retraction annular space via a throttle valve arrangement verbun ⁇ with a pressure medium sink, wherein the throttle valve arrangement of the Pressure in the annulus is determined. Further disclosed is a method for driving such a casting unit.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

L'invention concerne une unité de coulée hydraulique dotée d'un cylindre de coulée dont la chambre, active dans le sens de sortie, est alimentée en agent de pression par une unité de régulation de débit volumétrique pendant la phase de préremplissage. Une chambre annulaire active dans le sens d'entrée est reliée à un puits d'agent de pression par un dispositif de soupape d'étranglement qui détermine la pression dans la chambre annulaire. La présente invention porte également sur un procédé pour commander une unité de coulée de ce type.
EP05802781A 2004-10-15 2005-10-17 Unit de coulée hydraulique et procédé de commande associé Withdrawn EP1836013A2 (fr)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
DE102004050432 2004-10-15
DE102004050310 2004-10-15
DE102005022805 2005-05-12
DE102005022806 2005-05-12
DE102005034202A DE102005034202A1 (de) 2004-10-15 2005-07-21 Hydraulisch betätigte Gießeinheit
DE102005036060A DE102005036060A1 (de) 2004-10-15 2005-08-01 Hydraulisch betätigte Gießeinheit
PCT/DE2005/001850 WO2006039922A2 (fr) 2004-10-15 2005-10-17 Unité de coulée hydraulique et procédé de commande associé

Publications (1)

Publication Number Publication Date
EP1836013A2 true EP1836013A2 (fr) 2007-09-26

Family

ID=36148691

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05802781A Withdrawn EP1836013A2 (fr) 2004-10-15 2005-10-17 Unit de coulée hydraulique et procédé de commande associé

Country Status (3)

Country Link
EP (1) EP1836013A2 (fr)
DE (1) DE112005002528B4 (fr)
WO (1) WO2006039922A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009057992A1 (de) * 2009-12-11 2011-06-16 Netstal-Maschinen Ag Vorrichtung zur Ansteuerung eines doppelwirkenden Hydraulikkolbens einer Spritzgießmaschine
DE102017220832A1 (de) * 2016-11-24 2018-05-24 Robert Bosch Gmbh Hydraulische Gießeinheit
CN108443240A (zh) * 2018-03-30 2018-08-24 宁波海天金属成型设备有限公司 一种无增压油缸增压装置及方法
CN111151723A (zh) * 2020-01-06 2020-05-15 肇庆谊龙科技有限公司 一种局部加压系统

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5217329A (en) * 1975-07-31 1977-02-09 Toshiba Machine Co Ltd Die casting apparatus with gas and liquid pressure
JPH0890201A (ja) 1994-09-14 1996-04-09 Toshiba Mach Co Ltd ダイカストマシンの射出装置
CH691170A5 (de) 1995-06-13 2001-05-15 Buehler Ag Verfahren und Vorrichtung zum Regulieren der Bewegung eines Antriebskolbens.
DE19714141A1 (de) 1997-04-05 1998-10-08 Mannesmann Rexroth Ag Hydraulische Steueranordnung
ATE261348T1 (de) 2000-08-08 2004-03-15 Bosch Rexroth Ag Antriebsvorrichtung, insbesondere für die schliesseinheit, die einspritzeinheit oder die auswerfer einer kunststoffspritzgiessmaschine
DE10133990A1 (de) 2000-09-11 2002-03-21 Bosch Rexroth Ag Wegeventil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006039922A2 *

Also Published As

Publication number Publication date
DE112005002528B4 (de) 2021-12-09
DE112005002528A5 (de) 2007-07-12
WO2006039922A3 (fr) 2006-07-27
WO2006039922A2 (fr) 2006-04-20

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