EP3233330B1 - Dispositif de transport de métal fondu dans une unité de pression d'injection - Google Patents

Dispositif de transport de métal fondu dans une unité de pression d'injection Download PDF

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Publication number
EP3233330B1
EP3233330B1 EP15817065.4A EP15817065A EP3233330B1 EP 3233330 B1 EP3233330 B1 EP 3233330B1 EP 15817065 A EP15817065 A EP 15817065A EP 3233330 B1 EP3233330 B1 EP 3233330B1
Authority
EP
European Patent Office
Prior art keywords
piston
molten metal
cylinder bore
spacers
conveyor 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.)
Not-in-force
Application number
EP15817065.4A
Other languages
German (de)
English (en)
Other versions
EP3233330A1 (fr
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 EP3233330A1 publication Critical patent/EP3233330A1/fr
Application granted granted Critical
Publication of EP3233330B1 publication Critical patent/EP3233330B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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 conveying device for a molten metal in an injection pressure unit according to the preamble of claim 1.
  • 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 cylinder bore formed in a cylinder bore, whereupon a piston in the cylinder bore is axially displaced, whereby the molten metal is forced out of the cylinder bore is and passes into a further line in which it is fed to the mold cavity.
  • the piston can be adjusted between a 1st position, in which it is pulled out of the cylinder bore as far as possible, and a 2nd position, in which it is moved as far as possible into the cylinder bore. Between the 1st positino and the 2nd position, the maximum stroke of the piston is thus defined.
  • the piston is arranged vertically, so that the 1st position is the upper position of the piston and the 2nd position is the lower position of the piston, which will be turned off in the following, but the invention is not limited to the vertical orientation of the piston.
  • the collection chamber When the piston is in its 1st upper position, the collection chamber is filled with the molten metal, whereupon the piston moves to its 2nd lower position, thereby at least partially expelling the molten metal from the collection chamber.
  • the amount of molten metal displaced and delivered with one piston stroke, i. the Dosiervoltimen, is thus dependent on the size of the piston stroke.
  • a hydraulically adjustable stop member is provided, by means of which the retracted, ie upper position of the drive unit of a piston can be adjusted. This is done by being able to selectively place the stop element in an extended and a retracted position. In this way, the maximum piston stroke and in particular the upper position of the piston, in which this is as far as possible pulled out of the cylinder bore, changed and adjusted.
  • an additional piston-cylinder unit is necessary for this, which is structurally complex and expensive.
  • the invention has for its object to provide a delivery device for a molten metal in an injection pressure unit, in which the dosing volume can be easily changed and adjusted.
  • a conveying device for a molten metal in a spray pressure unit with the features of claim 1.
  • an adjusting device is also provided, by means of which the maximum stroke of the piston is variable. If the user the dosing volume, ie with a piston movement he would like to change from the collection chamber discharged amount of molten metal, he needs only by means of the adjustment to change the maximum stroke of the piston or limit, without having to intervene in the electronic control of the piston movement or the piston drive device.
  • the first upper position of the piston is changed by means of the adjustment, in which this is pulled out as far as possible from the cylinder bore.
  • the piston is in its 1st upper position either directly or indirectly via a component attached to it on a stop element and the adjustment device comprises exchangeable spacers which at the stop element facing the end of the piston or the component and / or directly on the stop element are attachable.
  • the spacers are placed in an exchangeable manner on a projection which is formed at the end of the piston remote from the collecting chamber or the component attached to it.
  • the spacers can be held on the approach either positive and / or non-positive, for example by detent.
  • the spacers are configured as U-shaped or horseshoe-shaped discs and laterally placed on the approach. Due to the size and number of spacers, a user can adjust in which axial position the piston is limited by the stop element in a further out of the collection chamber movement. It has been shown that in this way a very fine adjustment or adaptation of the metering volume can be achieved.
  • 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 are brought to a desired temperature or held on this can.
  • 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 replaceable in the receiving bore 12th held 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 moving the valve rod 19 relative to the piston 13 between a 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.
  • the piston 13 is fixedly connected at its upper end with a transverse plate 54, on the upper side of a component 55 is mounted, which protrudes upwards.
  • a fixed stop element 51 is arranged above the component 55.
  • the piston 13 is in its 1st upper position via the component 55 connected to it on the underside of the stop element 51 and can be moved axially out of this position.
  • FIG. 2 shows a first upper position of the piston 13, in which the component 55 rests with its upper side on the stop member 51.
  • the component 55 has on its upper side a stepped shoulder 53 of reduced diameter, which dips in the position shown in the stop member 51 and therefore only shown in dashed lines.
  • a user can slide a spacer 52 laterally if necessary.
  • Corresponding spacers 52 and 52a are in FIG. 4 represents.
  • the spacers 52, 52a are configured as U-shaped or horseshoe-shaped discs, which have different heights, so that the user can place a single spacer or a stack of spacers laterally on the projection 53, wherein the spacers 52, 52a on the approach 53 are held positively and / or non-positively.
  • spacers 52, 52a can be adjusted by the user, in which axial position the piston rests against the stop element 51. In this way, the 1st upper position of the piston 13 and thereby the maximum stroke and the dosing volume of the piston can be adjusted and changed, as in FIG. 3 is shown.
  • 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, via 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Claims (3)

  1. Dispositif de transport pour un métal fondu (M) dans une unité de pression d'injection, avec un conteneur de réserve (26) pour le métal fondu (M) et un canal de transport dans lequel le métal fondu (M) peut être amené dans un espace creux de moule, le canal de transport comprenant un alésage de cylindre (27) dans lequel un piston (13) avec une course maximale définie entre une 1e position et une 2e position est disposé de façon mobile dans le plan axial et une chambre de collecte (15) pour le métal fondu (M) étant prévue dans l'alésage de cylindre (27), le métal fondu (M) sortant de ladite chambre pouvant être amené dans l'espace creux de moule à travers une conduite (21) se prolongeant à la suite d'un coulissement axial du piston (13), un dispositif de réglage (50) étant prévu à l'aide duquel la course maximale du piston (13) peut varier, la 1e position du piston (13) dans laquelle celui-ci est le plus sorti de l'alésage de cylindre (27) pouvant varier à l'aide du dispositif de réglage (50) et le piston (13) reposant dans sa 1e position contre un élément de butée (51), caractérisé en ce que le dispositif de réglage (50) comprend des pièces d'écartement (52, 52a) amovibles pouvant être amenées au niveau du piston (13) et/ou au niveau de l'élément de butée (51).
  2. Dispositif de transport selon la revendication 1, caractérisé en ce que les pièces d'écartement (52, 52a) peuvent être placées de façon amovible sur un appendice (53) réalisé au niveau de l'extrémité de la chambre de collecte (15) opposée au piston (13).
  3. Dispositif de transport selon la revendication 2, caractérisé en ce que les pièces d'écartement (52, 52a) sont configurées sous la forme de disques en forme de U ou en forme de fer à cheval et peuvent être placées en côté sur l'appendice (53).
EP15817065.4A 2014-12-19 2015-12-03 Dispositif de transport de métal fondu dans une unité de pression d'injection Not-in-force EP3233330B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014018797.7A DE102014018797A1 (de) 2014-12-19 2014-12-19 Fördervorrichtung für eine Metallschmelze in einem Spritzdruckaggregat
PCT/EP2015/002433 WO2016096098A1 (fr) 2014-12-19 2015-12-03 Dispositif de transport de métal fondu dans une unité de pression d'injection

Publications (2)

Publication Number Publication Date
EP3233330A1 EP3233330A1 (fr) 2017-10-25
EP3233330B1 true EP3233330B1 (fr) 2019-07-31

Family

ID=55027687

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15817065.4A Not-in-force EP3233330B1 (fr) 2014-12-19 2015-12-03 Dispositif de transport de métal fondu dans une unité de pression d'injection

Country Status (3)

Country Link
EP (1) EP3233330B1 (fr)
DE (1) DE102014018797A1 (fr)
WO (1) WO2016096098A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0328993Y2 (fr) * 1985-11-07 1991-06-20
US5632321A (en) * 1996-02-23 1997-05-27 Prince Machine Corporation Die casting machine with compound docking/shot cylinder
JP3770688B2 (ja) * 1997-02-25 2006-04-26 Ｙｋｋ株式会社 射出成形機
WO2002085560A1 (fr) * 2001-04-19 2002-10-31 Alcoa Inc. Injecteur pour systeme d'alimentation en metal en fusion
DE102012010923A1 (de) 2012-06-04 2013-12-05 Gebr. Krallmann Gmbh Fördervorrichtung für eine Metallschmelze in einem Spritzdruckaggregat

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2016096098A1 (fr) 2016-06-23
DE102014018797A1 (de) 2016-06-23
EP3233330A1 (fr) 2017-10-25

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