EP3233331B1 - Fördervorrichtung für eine metallschmelze in einem spritzgussaggregat - Google Patents

Fördervorrichtung für eine metallschmelze in einem spritzgussaggregat Download PDF

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Publication number
EP3233331B1
EP3233331B1 EP15822908.8A EP15822908A EP3233331B1 EP 3233331 B1 EP3233331 B1 EP 3233331B1 EP 15822908 A EP15822908 A EP 15822908A EP 3233331 B1 EP3233331 B1 EP 3233331B1
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EP
European Patent Office
Prior art keywords
accordance
piston
cylinder bore
cooling
feed
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.)
Active
Application number
EP15822908.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3233331A2 (de
Inventor
Ingo Brexeler
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.)
Gebr Krallmann GmbH
Original Assignee
Gebr Krallmann GmbH
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 Gebr Krallmann GmbH filed Critical Gebr Krallmann GmbH
Publication of EP3233331A2 publication Critical patent/EP3233331A2/de
Application granted granted Critical
Publication of EP3233331B1 publication Critical patent/EP3233331B1/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
    • B22D17/02—Hot chamber machines, i.e. with heated press chamber in which metal is melted
    • B22D17/04—Plunger machines
    • 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
    • B22D17/2023—Nozzles or shot sleeves
    • 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
    • B22D17/203—Injection pistons
    • 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
    • B22D17/2038—Heating, cooling or lubricating the injection unit
    • 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
    • B22D17/30—Accessories for supplying molten metal, e.g. in rations
    • 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 invention relates to a delivery device for a molten metal in an injection pressure unit, with a reservoir for the molten metal and a delivery channel in which the molten metal is fed to a mold cavity, wherein the delivery channel comprises a cylinder bore in which a piston is arranged axially adjustable, and wherein the cylinder bore is provided with a collecting chamber for the molten metal, from which the molten metal can be introduced into the mold cavity as a result of an axial displacement of the piston by a further line, the cylinder bore being surrounded by a first heating device which has at least one heating element.
  • a liquid metal which is usually a metal alloy, is introduced into a mold cavity and cures therein, so that a metallic component corresponding to the mold cavity is formed.
  • the introduction of the molten metal takes place under a pressure under which the molten metal is set.
  • a molten metal conveying apparatus in which the molten metal is supplied from a reservoir to a collecting chamber formed in a cylinder bore, whereupon a piston in the cylinder bore is axially displaced, whereby the molten metal is forced out of the collecting chamber is and passes into a further line in which it is fed to the mold cavity.
  • the quality of the metal component produced with a corresponding injection molding unit depends essentially on the fact that the molten metal has sufficient fluidity on its conveying path between the reservoir and the mold cavity and does not become viscous on the conveying path or even solidifies. To achieve this, it is known to heat the molten metal in the reservoir to a sufficient temperature to ensure that the molten metal still has a sufficiently high temperature and thus a good flowability even when it enters the mold cavity. In practice, however, it has proved to be relatively difficult to ensure sufficient temperature control and thus flowability for the large number of possible metal alloys which can be processed with the injection molding unit.
  • the invention has for its object to provide a conveyor device of the type mentioned, in which damage or functional impairment due to excessive heat is avoided.
  • a conveying device for a molten metal in a spray pressure unit with the features of claim 1. It is provided in a known manner that the cylinder bore, in which the collecting chamber is formed, is surrounded by a first heating device, which has at least one heating element.
  • the basic idea is to set or hold the molten metal on its conveying path between the reservoir and the mold cavity, at least in sections, by using a first heating device to a desired temperature in order to prevent the molten metal from losing its fluidity on its conveying path.
  • a first heating device in the region of the cylinder bore has the further advantage that the molten metal in the reservoir does not have to be heated excessively, so that the risk is prevented that by the excessive heating of the molten metal in the reservoir further attachments, especially electronic Controls or drive devices of the conveyor damaged or they are limited in their function.
  • the piston can be adjusted axially within the cylinder bore to push out of the molten metal in the collection chamber out of this.
  • a preferably electric or hydraulic drive device and / or an electronic control device is provided, which are usually arranged at the upper, the collection chamber remote from the end of the piston.
  • the drive device and / or the control device are temperature-sensitive components that tend to malfunction if overheated.
  • Order a proper Operation of the drive device and / or the control device to ensure despite the heating of the molten metal by the first heater is provided according to the invention that the drive device and / or the control device is associated with a cooling device.
  • the cooling device can either be an electric cooling device, for example a Peltier element, or cooling channels through which a cooling fluid and in particular a cooling fluid flows.
  • a partition wall is provided, which is penetrated by the piston.
  • the partition wall serves as a heat shield and shields the area heated by the heater and the area cooled by the cooling device from each other.
  • the partition wall can be cooled by means of the cooling device by, for example, a cooling channel is integrated into the partition wall.
  • the first heater comprises a plurality of evenly distributed over the circumference of the cylinder bore, in particular arranged heating elements, which may for example be at a radial distance from the cylinder bore and parallel to this.
  • the heating elements may be formed by electric heating cartridges, which are each inserted into a bore in the housing of the conveying device.
  • the heating cartridges are an electrical resistance heating, but alternatively it is also possible that the first heater is formed by channels, which are flowed through by a hot fluid and in particular a hot liquid.
  • the number and arrangement of the heating elements depends on the size of the injection molding apparatus and in particular the cylinder bore, but in practice it has proven to be useful when four to eight heating elements are used, but the invention is not limited thereto.
  • An exact temperature of the wall of the cylinder bore and the surrounding components and thus the molten metal can be achieved if the heating elements are individually and / or group-controlled.
  • a control can be used in which the temperature of the individual heating elements and / or molten metal and / or the wall of the cylinder bore is detected and evaluated, wherein the heating elements are controlled individually or in groups to a desired temperature or a to achieve the desired temperature profile.
  • the piston has an axial bore in which a valve rod is slidably received.
  • the valve rod at its end facing away from the collection chamber has a valve rod drive device, in particular in the form of an electric drive motor or a hydraulic drive device and / or an electronic control device, wherein the valve rod drive device and / or the control device by means of the cooling device can be cooled is. In this way, a proper function of the valve rod drive device and / or the control device and thus the valve stem is ensured.
  • the reservoir of the molten metal is assigned a second heating device which can be controlled independently of the first heating device for the cylinder bore.
  • the molten metal in the reservoir has been kept under a protective gas atmosphere.
  • a protective gas atmosphere for example, the interior of the reservoir above the molten metal with carbon dioxide (CO 2 ) or nitrogen (N 2 ) are filled and acted upon.
  • the molten metal is forced out of the collection chamber by the piston and enters a further line, in which usually a check valve is arranged.
  • a check valve is assigned a third heating device which can be controlled independently of the first heating device for the cylinder bore and independently of the second heating device for the reservoir.
  • Both the second heating device and the third heating device can be formed by electrical resistance heaters, for example heating cartridges, but it is also possible to provide heating channels through which a hot fluid and in particular a hot fluid flows.
  • FIG. 1 illustrated conveying device 10 for a molten metal M in a spray pressure unit has a housing 11 in which a vertical receiving bore 12 is formed.
  • a reservoir 26 is provided, which is filled with the molten metal M.
  • the molten metal M can be supplied in liquid form to the reservoir 26 or be generated in this by melting, for example, a metal granules.
  • the reservoir 26 is airtight covered by a cover member 45 and formed above the molten metal M in the reservoir 26 space 46 is filled with a protective gas, such as carbon dioxide (CO 2 ) or nitrogen (N 2 ).
  • a protective gas such as carbon dioxide (CO 2 ) or nitrogen (N 2 ).
  • a second heater 43 is integrated in the region of the reservoir 26, which may be an electrical resistance heater, with which the wall of the reservoir 26 and thus the molten metal M can be brought to a desired temperature or held on this.
  • the reservoir 26 is connected via at least one obliquely downwardly in the flow direction inclined inlet channel 18 with the receiving bore 12 in connection.
  • a fitting 28 is inserted with close fit, which has a tubular configuration and is closed at its lower end.
  • the fitting 28 is replaceably held in the receiving bore 12 and has a central axial cylinder bore 27 which is configured in the form of an upwardly opening blind bore.
  • an obliquely extending connecting bore 30 is provided, which is aligned with the inlet channel 18 and connects it with the cylinder bore 27.
  • a piston 13 is slidably inserted under close fit.
  • an annular space 17 is formed on the outer side of the piston 13.
  • a plurality of filling bores 16 arranged distributed over the circumference of the piston 13 in the piston 13 in each case extend to the lower end face of the piston 13. That region of the piston 13 in which the filling bores 16 are formed lies in a sealed manner against the inner wall the cylinder bore 27 at.
  • the piston rings 31 consist for example of a spring steel.
  • the piston 13 further comprises a central axial bore 14 in which a valve rod 19 is slidably disposed, which completely penetrates the piston 13 and carries at its lower end downstream of the end face of the piston 13 a plate-like valve body 20.
  • the valve body 20 can by displacing the valve rod 19 relative to the piston 13 between an in FIG. 1 illustrated closed position in which the valve body 20 prevents leakage of molten metal from the filling holes 16, and be adjusted to an open position, not shown, in which the molten metal from the filling holes in an underlying, formed in the cylinder bore 27 collecting chamber 15 can flow.
  • the cross section of the valve body 20 is smaller than the cross section of the cylinder bore 27, so that the valve body 20 within the cylinder bore 27 has a sealing function and the molten metal M, the valve body 20 can flow freely.
  • an only indicated pressure sensor 49 Arranged in the collecting chamber 15 is an only indicated pressure sensor 49, which via a line supplies a pressure signal to a control device, not shown, which controls the drive of the piston 14. In this way, a control loop for the drive (hydraulic cylinder) of the piston 14 is given.
  • the cylinder bore 27 and the collecting chamber 15 formed in its lower region is connected at the lower end via a continuing line 21 with a mold cavity, not shown.
  • the continuing line 21 comprises a lower transverse bore 32 in the wall of the fitting 28, which is aligned with a further transverse bore 33 in the housing 21 through which the collecting chamber 15 is connected to a vertical riser 22.
  • the riser 22 passes at its upper end in a filling channel 23, from which the molten metal is supplied to the mold space, as indicated by the arrow F.
  • a check valve 24 is arranged, which has a valve body 25 which is tensioned by a spring 34 against the flow direction against a valve seat 35.
  • the cylinder bore 27 and the fitting 28 are surrounded by a first heater 36, which has a plurality of distributed over the circumference of the fitting piece 28 arranged heating elements 37, which are each inserted into a bore formed in the housing, as in FIG. 1 indicated by dashed lines.
  • the arrangement of the heating elements 37 which are preferably electrical heating cartridges, is in FIG. 2 shown. It can be seen that six heating elements 37 are provided which are distributed uniformly over the circumference of the fitting piece 28 and preferably each individually or in groups can be controlled. With the aid of the heating device 36, it is possible to bring the molten metal M in the region of the connecting bore 30, the filling holes 16, the collecting chamber 15 and at least partially in the continuing line 21 to a desired temperature or to keep this.
  • the check valve 24 is associated with a third heater 44, with which the molten metal, which flows through the check valve 24, is tempered, in particular within the check valve 24.
  • the third heating device 44 may be formed by an electrical resistance heating or heating channels, which are flowed through by a hot fluid and in particular a hot liquid.
  • the collecting chamber 15 facing away from the end of the piston 13 and the valve rod 19 is disposed in a outside of the housing 11 arranged drive and control housing 47, in which an only indicated drive device 38 for the piston 13 and also only indicated valve rod driving device 41 are arranged , with which the piston 13 and the valve rod 19 are axially adjustable. Also within the drive and control housing 47, an electronic control device 48 is provided in particular for the said drive devices, which is indicated only schematically.
  • the drive and control housing 47 has on its side facing the housing 11 a partition wall 40 which is penetrated by the piston 13 and the valve rod 19 under close fit and which serves as a thermal shield.
  • a cooling device 39 which comprises a plurality of cooling channels 42, which are flowed through by a cooling liquid and extend through both the drive and control housing 47 and through the partition 40.
  • the cooling device 39 it is possible, the interior of the drive and control housing 47 and thus the drive device 38th for the piston 13, the valve-rod driving device 41 and the electronic control device 48 to an advantageous operating temperature of preferably ⁇ 80 ° C, since due to the heater 36 there is a risk that the components mentioned otherwise become too hot and damaged.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
EP15822908.8A 2014-12-19 2015-12-15 Fördervorrichtung für eine metallschmelze in einem spritzgussaggregat Active EP3233331B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014018798.5A DE102014018798A1 (de) 2014-12-19 2014-12-19 Fördervorrichtung für eine Metallschmelze in einem Spritzgussaggregat
PCT/EP2015/002517 WO2016096120A2 (de) 2014-12-19 2015-12-15 Fördervorrichtung für eine metallschmelze in einem spritzgussaggregat

Publications (2)

Publication Number Publication Date
EP3233331A2 EP3233331A2 (de) 2017-10-25
EP3233331B1 true EP3233331B1 (de) 2019-07-31

Family

ID=55080076

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15822908.8A Active EP3233331B1 (de) 2014-12-19 2015-12-15 Fördervorrichtung für eine metallschmelze in einem spritzgussaggregat

Country Status (7)

Country Link
US (1) US10675677B2 (zh)
EP (1) EP3233331B1 (zh)
JP (1) JP6749328B2 (zh)
CN (1) CN107206478B (zh)
CA (1) CA2971496A1 (zh)
DE (1) DE102014018798A1 (zh)
WO (1) WO2016096120A2 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107866544A (zh) * 2017-11-08 2018-04-03 马鞍山市万鑫铸造有限公司 一种铸造成型装置
DE102018108915A1 (de) * 2018-04-16 2019-10-17 Atlas Copco Ias Gmbh Dosierventil

Family Cites Families (18)

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Publication number Priority date Publication date Assignee Title
US3201836A (en) * 1964-09-21 1965-08-24 Mount Vernon Die Casting Corp Method of, and apparatus for, die casting metals
US3461946A (en) * 1966-09-14 1969-08-19 Vasco Metals Corp Method of die casting
CA1253310A (en) 1986-10-17 1989-05-02 Mold-Masters Limited Fluid cooled hydraulic actuating mechanism for injection molding
JP3422590B2 (ja) 1995-03-22 2003-06-30 本田技研工業株式会社 金属成形体用射出成形装置
JPH11188769A (ja) * 1997-12-25 1999-07-13 Haruna:Kk 射出成形機、ペレット投入装置ユニット、射出成形システム、射出成形物品及び射出成形方法
JP2001030060A (ja) 1999-07-23 2001-02-06 Mitsubishi Heavy Ind Ltd 半溶融金属供給装置における半溶融金属の固相率制御装置
DE20116677U1 (de) * 2001-10-12 2001-12-13 Ortmann Druckgiestechnik Gmbh Gießkammer zum Druckgießen von Metallen
US20030094257A1 (en) * 2001-11-19 2003-05-22 Takata Corporation Shutterless injection molding method and apparatus
DE10157349A1 (de) 2001-11-22 2003-06-12 Demag Ergotech Gmbh Vorrichtung und Verfahren zum Giessen von metallischen Materialien
US7034263B2 (en) * 2003-07-02 2006-04-25 Itherm Technologies, Lp Apparatus and method for inductive heating
US7279665B2 (en) 2003-07-02 2007-10-09 Itherm Technologies, Lp Method for delivering harmonic inductive power
JP2007061880A (ja) 2005-09-01 2007-03-15 Kobe Steel Ltd 射出成形装置
DE102006010084B3 (de) * 2006-02-24 2007-05-03 Oskar Frech Gmbh + Co. Kg Beheizbare Dosiereinrichtung für eine Warmkammer-Druckgießmaschine
JP4824081B2 (ja) * 2006-03-13 2011-11-24 住友重機械工業株式会社 射出成形機
DE102008025557B4 (de) * 2008-05-28 2010-04-08 gwk Gesellschaft Wärme Kältetechnik mbH Spritzgießmaschine
DE102012102549A1 (de) 2011-11-15 2013-05-16 Ferrofacta Gmbh Druckgussdüse und Verfahren zum Betrieb der Druckgussdüse
DE102012009412B4 (de) 2012-05-11 2014-09-18 Incoe International, Inc. Kühlvorrichtung für den Antrieb zur Verstellung der Nadel einer Nadelventildüse in Heißkanalsystemen für Spritzgießanlagen
DE102012010923A1 (de) 2012-06-04 2013-12-05 Gebr. Krallmann Gmbh Fördervorrichtung für eine Metallschmelze in einem Spritzdruckaggregat

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Also Published As

Publication number Publication date
JP6749328B2 (ja) 2020-09-02
CA2971496A1 (en) 2016-06-23
US10675677B2 (en) 2020-06-09
US20170348766A1 (en) 2017-12-07
CN107206478A (zh) 2017-09-26
WO2016096120A3 (de) 2016-09-01
WO2016096120A2 (de) 2016-06-23
JP2018501112A (ja) 2018-01-18
CN107206478B (zh) 2020-10-16
DE102014018798A1 (de) 2016-06-23
EP3233331A2 (de) 2017-10-25

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