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EP2506999B1 - Ensemble d'injection pour machine a couler sous pression - Google Patents

Ensemble d'injection pour machine a couler sous pression Download PDF

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Publication number
EP2506999B1
EP2506999B1 EP10787072.7A EP10787072A EP2506999B1 EP 2506999 B1 EP2506999 B1 EP 2506999B1 EP 10787072 A EP10787072 A EP 10787072A EP 2506999 B1 EP2506999 B1 EP 2506999B1
Authority
EP
European Patent Office
Prior art keywords
casting
piston
chamber
casting chamber
passage
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
EP10787072.7A
Other languages
German (de)
English (en)
Other versions
EP2506999A1 (fr
Inventor
Norbert Erhard
Helmar Dannenmann
Jürgen KURZ
Andreas Sydlo
Daniel Gerner
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.)
Oskar Frech GmbH and Co KG
Original Assignee
Oskar Frech GmbH and Co KG
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 Oskar Frech GmbH and Co KG filed Critical Oskar Frech GmbH and Co KG
Priority to HRP20170511TT priority Critical patent/HRP20170511T1/hr
Priority to PL10787072T priority patent/PL2506999T3/pl
Publication of EP2506999A1 publication Critical patent/EP2506999A1/fr
Application granted granted Critical
Publication of EP2506999B1 publication Critical patent/EP2506999B1/fr
Active 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
    • 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
    • B22D17/08—Cold chamber machines, i.e. with unheated press chamber into which molten metal is ladled
    • 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

Definitions

  • the invention relates to a casting unit for a die casting machine according to the preamble of claim 1.
  • Casting units are typically used in the corresponding die casting machines, e.g. hot chamber or cold chamber type, to promote a molten metal by the action of the casting piston from the casting chamber at high speed and high pressure in a mold cavity. In the mold cavity, solidification of the molten metal then forms the desired metallic casting.
  • the casting unit has relatively high temperatures and pressures of the molten metal of e.g. to withstand over 600 ° C and 1000 bar, which is known to require special design measures.
  • the casting piston is typically designed as a slide piston which can be axially moved back and forth in a hollow-cylindrical casting chamber body, its outer cross-section corresponding to the internal cross-section of the casting chamber body.
  • this spool forms a casting chamber volume variably delimiting, axially movable end wall of the casting chamber
  • this conventional G cordkolbentyp by its the inner cross section of G fool screening stressess corresponding outer cross section seals the Gelloclon to this end side, possibly supported by associated sealing means, which are arranged for example on the piston outer periphery
  • the power transmission to the casting piston via a provided on the casting chamber facing away from the front end of the casting piston piston shaft with respect to the casting piston of smaller cross-section.
  • Casting units with said spool type pose some specific technological challenges.
  • One problem is the effect of so-called edge shell solidification.
  • melt material can solidify on its inner wall and disturb or aggravate the movement of the casting piston sealingly moving along it with two-dimensional surface contact.
  • casting piston moved back except for casting material usually also air in the casting chamber, which in the mold filling, i. when advancing the casting piston, must be expelled again or can lead to melt oxidation problems.
  • casting units of the displacer type according to the preamble of claim 1 have already been proposed.
  • the publication EP 0 576 406 A2 discloses such a casting unit, wherein there the casting chamber is cylindrical with a substantially constant diameter along its length and the casting piston is designed as a Budapestwegbare cylindrical rod with an annular stepped widened foot part, the piston diameter both in the bar area and in the widened foot area smaller than the inner diameter of the cylindrical casting chamber is.
  • a piston entrance side portion of the casting chamber body forms a cylindrical passage opening with respect to the inner diameter the casting chamber larger opening diameter, a ring-cylindrical seal pack is firmly clamped in this passage opening is taken by pressing against the front by an end face screwed to the casting chamber body pressure plate against an axially opposite annular shoulder, where the wider passage opening merges into the narrower casting chamber.
  • the axially preloaded sealing pack is supported radially outwardly on the inner wall of the passage opening of the casting chamber body.
  • the widened foot part of the casting piston is required to be able to remove the sealing packing stuck in the lead-through opening if necessary.
  • the technical object of the invention is to provide a casting unit for a die casting machine which can overcome or at least reduce the above-mentioned difficulties of conventional sliding piston type casting units and which offers advantages over conventional positive displacement casting units.
  • the invention solves this problem by providing a pouring unit having the features of claim 1.
  • the pouring piston extends through a feedthrough opening of the pouring chamber body from outside into the pouring chamber, with a free space region of the pouring chamber being moved between an outer casing surface of the pouring chamber into the pouring chamber Casting piston and one of these transverse to the casting piston longitudinal direction opposite inner wall surface of the casting chamber body is formed by an outer cross section of the casting piston is correspondingly smaller than an inner cross section of the casting chamber body.
  • the casting piston is of a displacer type which accordingly reduces the casting chamber volume by moving forward into the casting chamber without sealingly abutting its outer cross section in the manner of a conventional slide piston against the inner cross section of the casting chamber body.
  • a casting piston temperature control device for at least partially active temperature control of the casting piston.
  • the temperature of the casting piston can be actively influenced as required and in the case of application, the part of which is in each case located in the casting chamber the temperature is affected by the local hot casting material.
  • the casting-piston tempering device is designed to be able to actively temper the casting piston along at least part of its length in accordance with a predeterminable temperature profile. For example, a temperature influence of the hot casting material leading to a temperature gradient along the casting piston in the casting chamber can thus be suitably partially compensated or completely compensated for on the casting piston.
  • a sealing element is provided for sealing the G monkolben presser.
  • the sealing element is arranged on a casting chamber facing the inside of the passage opening or the guide sleeve. Arranging on the inside has the advantage that solidified melt material, if it should come to a solidification effect in this area, can easily be pushed back into the casting chamber during advancement of the casting piston without resulting in disturbing phenomena of friction between the casting piston and the inner wall of the casting chamber body Has. Even when moving back the casting piston makes melt material that eventually solidifies in the region of the sealing element on the inside of the lead-through opening or the guide sleeve, no problems, if only because this return movement can take place quasi unpressurized in contrast to the advance of the casting.
  • the casting material in the casting chamber is not in the return movement of the casting piston under the high pressure, as it prevails during the Formglallphase when advancing the casting piston, but is depressurized or at most under a much lower supply pressure, optionally for feeding of casting material into the casting chamber can be used.
  • the casting piston has an outer diameter which extends at least via one into the casting chamber into and through the passage opening through movable part of the casting piston is constant and corresponds to the diameter of the passage opening substantially.
  • An annular gap thus remains as a free space region of the casting chamber between the casting piston section, which is moved forward into the casting chamber, and the radially opposite inner wall surface of the casting chamber body, which has a larger inner diameter than the outer diameter of the casting piston, which remains permanently in the casting chamber volume which is not closed off by the casting piston. Since the constant outer diameter of the casting plunger part in question essentially corresponds to the diameter of the lead-through opening, the casting plunger is guided safely and without play in the bushing opening itself.
  • the casting material inlet opens into the free space region and / or into the casting material outlet of the casting chamber. This has the advantageous consequence that the pouring chamber inlet is not blocked even with maximum advancing casting piston of the latter.
  • casting material can already be supplied from the beginning of the return movement of the casting piston from its maximum advancing position via the pouring inlet into the casting chamber.
  • the pouring inlet is mostly blocked by the advancing pouring piston and is released therefrom only when the pouring piston has moved back a certain distance from its maximum advancing position.
  • the present pouring unit consequently enables a comparatively uniform, homogeneous feeding of casting material into the casting chamber and thus also the avoidance of undesirable turbulences and an undesired suction of ambient air via the casting material outlet during the backward movement of the casting piston.
  • the casting chamber can thus always be kept completely filled with casting material without further notice.
  • the casting material inlet and / or a casting material supply line assigned to it are provided with a shut-off element which prevents casting material from emerging from the casting chamber via the casting material inlet.
  • a shut-off element which prevents casting material from emerging from the casting chamber via the casting material inlet.
  • it may be an active or passive shut-off element of conventional type, e.g. around a corresponding check valve.
  • the casting chamber body has a hollow cylinder, and the passage opening is provided at a front end thereof.
  • the casting piston can then extend, for example, with the piston longitudinal axis parallel to the hollow cylinder longitudinal axis, axially via the passage opening into the casting chamber.
  • the casting material outlet and / or the casting material inlet is provided on the end face of the hollow cylinder opposite the feed-through opening or on a cylinder jacket surface of the hollow cylinder.
  • a guide sleeve is provided for the casting piston, which extends from one of the casting chamber outside of the passage opening to the outside and / or from one of the casting chamber facing inside the passage opening into the casting chamber inside.
  • a casting chamber temperature control device for active temperature control of the casting chamber.
  • This can be used, for example, melt solidification effects Prevent in the casting chamber or to achieve a relatively homogeneous temperature distribution of the casting material in the casting chamber.
  • the casting unit has a relief ring groove and a discharge channel, wherein the relief ring groove is located on a casting piston facing inner wall of the passage opening or the guide sleeve and the discharge channel leads from the Entlastungsringnut out to the outside of the casting chamber. If, for example, because of wear, some melt material or another fluid passes between the casting piston and the feedthrough opening or guide sleeve, this can be removed in a controlled manner via the relief ring groove and the discharge channel to the outside.
  • FIG. 1 schematically illustrated casting unit is particularly suitable for processing liquid and semi-molten metal melts, such as alloys of tin, zinc, lead, aluminum, magnesium, titanium, steel or copper or more of these metals, mixtures of several metals and optionally such materials with admixtures of particles, in an associated die casting machine.
  • the casting unit can be installed, for example, as a so-called vertical or horizontal casting unit in the caster in question, depending on requirements and in particular depending on Druckg phonemaschinentyp.
  • the casting unit has a casting chamber body 1, which in the example shown comprises a hollow cylinder 1a, which forms a casting chamber 2 with its interior. At one in Fig.
  • the casting unit comprises a casting piston 4, which is realized as an elongated displacement piston and extends through a passage opening 5 of the casting chamber body 1 from the outside into the casting chamber 2.
  • the lead-through opening 5 is provided at the end face of the hollow-cylindrical casting chamber body 1 opposite the pouring material outlet 3, and in the same way as the pouring material outlet 3 centrally to a longitudinal axis 1b of the casting chamber hollow cylinder 1.
  • the casting piston 4 is aligned with the hollow cylinder longitudinal axis 1b Longitudinal axis 4a held axially movable back and forth, as symbolized by a movement double arrow B, where he in Fig. 1 is shown in a rearward end position.
  • the casting piston 4 has an outer diameter d which is constant at least via a part of the casting piston 4 that can be moved into the casting chamber 2 or through the lead-through opening 5 and essentially corresponds to the diameter of the lead-through opening 5.
  • this part of the casting piston 4 may also have a slightly conical shape, in which case provision must be made for a suitable sealing.
  • the casting chamber hollow cylinder 1a has a larger inner diameter D, ie D> d, so that between the advancing into the casting chamber and the radially opposite casting chamber an annular gap 6 remains as a free space region of the casting chamber, which permanently belongs to the casting chamber, since he not shut off from the casting piston. In other words lie in one in the Fig.
  • the free space annular gap 6 thus formed during operation is permanently filled with the casting material located in the casting chamber 2.
  • the casting piston 4 in its not in the casting chamber 2 into movable rear section a can have any cross-sectional configuration, such as a stepped or conical shape.
  • a pouring-chamber-side front end 4c of the casting piston 4 is located at a short distance from the passage opening 5 in the casting chamber 2. From this rear end position, the casting piston 4 can each be advanced so far that the desired amount of liquid or partially liquid casting material in the associated Mold filling is discharged from the casting chamber 2 in the mold cavity, ie The volume of casting material to be discharged is equal to the volume of the casting plunger 4 moved into the casting chamber 2.
  • the casting plunger 4 can be advanced to a position in which its front face end 4c reaches the inner wall of the casting chamber body 1 at the end face which is the G dirtmaterialauslass 3, wherein the piston diameter d in this example is greater than a diameter a of the G fauxauslasses 3.
  • the casting piston 4 can advance with its front end 4c into the G manmaterialauslass 3, if appropriate for the particular application.
  • the front end position of the casting piston 4 can be defined by the stroke of a conventional, not shown drive for the casting piston 4 or by a corresponding limit stop.
  • Casting material can be supplied to the casting chamber 2 via a casting material supply line 7 and an associated casting material inlet 8, which is introduced into a cylinder jacket surface of the hollow cylinder 1a.
  • the casting material inlet 8 and / or the casting material supply line 7 are provided with a active or passive acting shut-off element 9 is provided with which prevents the casting material located in the casting chamber during advancement of the casting piston 4 in the casting chamber 2 can escape via the casting material inlet 8.
  • the shut-off element 9 can be realized as a check valve as shown schematically.
  • a sealing element 10 For sealing the passage of the casting piston 4 through the passage opening 5, a sealing element 10, e.g. a sealing rubber or metal ring, provided on a casting chamber side inside the passage opening 5.
  • the sealing element 10 is preferably designed, e.g. As a correspondingly shaped sealing lip member that it presses under the pressure of the casting material in the casting chamber 2 sealingly against the performed casting piston 4 and / or embedded in the passage opening 5 or inserted.
  • the sealing element 10 is an elastic or non-elastic design with suitable geometry can be used as needed.
  • a guide sleeve 11 is provided with the piston diameter d corresponding sleeve inner diameter, which is realized in the example shown as an axial extension or flange of the casting chamber 1.
  • the guide sleeve 11 in the exemplary embodiment shown serves to receive a guide sleeve tempering device 12, which serves for the active guide sleeve temperature control and, as shown, can also extend axially into the region of the leadthrough opening 5.
  • the temperature control device 12 can also contribute to the temperature control of the guided in the guide sleeve 11 casting piston 4. It may, for example, be of a type with a liquid or gaseous tempering medium which is passed through tempering passages which surround the casting plunger 4 coaxially in the corresponding section of the guide sleeve 11 or the leadthrough opening 5.
  • a corresponding G mankolben tempering device 14 may be provided, which in turn is for example of a type with a liquid or gaseous temperature control, which is passed through one or more temperature control channels 14a, which in the casting piston 4 itself extend.
  • this is realized in that a tempering tube 15 is longitudinally inserted into an interior 16 of the casting piston 4 realized for this purpose as a hollow cylinder, leaving an annular gap between the temperature control tube 15 and the casting piston inner wall.
  • the annular gap represents a first temperature control channel
  • the temperature control tube 15 represents a second temperature control channel, whereby the temperature control medium can be guided via one of the two temperature control channels into the front casting piston area and can be led back to the rear via the other temperature control channel.
  • the tempering devices 12, 14 mentioned can be used to actively temper the casting piston 4 or the guide sleeve 11 in the relevant section, eg according to a predeterminable temperature profile along at least part of its length which can be advanced into the casting chamber. In particular, this can be counteracted depending on the needs and application of the influence of temperature of the hot casting melt in the casting chamber 2 on the movable into the casting chamber part of the casting piston 4, for example, for the purpose of not causing excessive axial temperature gradients in the casting piston 4, due to locally different piston material expansion could complicate the sealing of the casting piston 4 at the passage opening 5.
  • the two temperature control devices 12, 14 can be suitably matched to one another for this purpose of a desired temperature control of the casting piston 4 and expediently also of the guide sleeve 11, wherein in alternative embodiments also only one of the two tempering 12, 14 may be provided.
  • a casting chamber temperature control device 13 is provided, with which the casting chamber 2 together with casting material inlet 8 together with adjoining casting material supply line 7 and casting material outlet 3 together with adjoining casting material outlet line can be controllably actively controlled in a desired manner.
  • this tempering device 13 can also be used e.g. be of a type with a liquid or gaseous tempering medium, which is passed through tempering, which coaxially surround the hollow cylinder 1a and the G confusematerialzuschreibtechnisch 7 and / or the G fauxauslasstechnisch.
  • the tempering device 13 With this tempering device 13, it is consequently possible to keep the casting material at a comparatively constant temperature level without strong temperature gradients, when it is fed into the casting chamber 2 via the supply line 7 for the next casting operation, stored there and then discharged via the casting material outlet 3 in the mold filling process becomes. If required, the tempering device 13 can be divided into a plurality of separately controllable tempering zones or tempering units.
  • the casting piston 4 acts as a pure displacer whose feed into the casting chamber 2 determines the quantity of melt to be discharged from the casting chamber 2 at high speed and high pressure, as usual the casting piston 4 moves freely into the casting chamber 2, without having to conduct its surface along a cylindrical inner wall of the casting chamber body 1 flat. Disturbing frictional effects on a corresponding sliding surface between the casting piston and G manfittwand, as the conventional casting of the spool type are inherent, account for principle in this casting unit of Verdrängerkolbentyp.
  • the displacement piston principle implemented here facilitates the construction of a high pressure and the movement of the casting piston 4 at high speed to effect the mold filling, wherein the then closed shut-9 holds the casting material 8 closed, so that the casting material displaced by the casting piston 4 alone on the G confusematerialauslass 3 from the pouring chamber 2 out to fill the mold cavity.
  • the casting piston configuration according to the invention has the advantage that no piston lubricant is needed and consequently no corresponding residues can occur in the casting produced.
  • Fig. 2 to 5 illustrate various advantageous variants of the casting of Fig. 1 wherein like reference numerals are used to facilitate understanding of identical or functionally equivalent elements are and to that extent on the above remarks to casting unit of Fig. 1 can be referenced.
  • Fig. 2 shown casting unit has in addition to that of Fig. 1 a relief annular groove 17 and an associated discharge channel 18.
  • the relief annular groove 17 is annularly introduced in this example in the inner wall of the guide sleeve 11, and at an axial height between the passage opening 5 of the casting chamber 1 and the axially outer end face of the guide sleeve 11.
  • the discharge channel 18 leads from the relief ring groove 17 to the outside, ie in the outer space outside the casting chamber 1, to which the relief channel 18 is introduced, for example, as a radial bore through the wall of the guide sleeve 11 therethrough.
  • the relief annular groove 17, together with the relief channel 18, forms a leak-removing means for the controlled removal of any material, such as melt material, which may undesirably enter the gap between the casting piston 4 and the through-hole 5 or guide sleeve 11, e.g. due to wear on the outside of the casting piston 4, on the sealing element 10 and / or on the inside of the passage opening 5 and the guide sleeve 11th
  • Fig. 3 shown casting unit is different from those of Fig. 1 and 2 in that the casting material inlet 8 does not open into the free space area 6 but into the area of the casting material outlet 3 of the casting chamber 2. This placement of the casting material inlet 8 ensures that it is not blocked off by the advancing casting piston 4. Otherwise, the above apply to the embodiments of Fig. 1 and 2 explained properties and advantages in the same way for the casting unit of Fig. 3 ,
  • a guide sleeve 11 ' is formed which in this case extends primarily into the casting chamber 2, ie with a predeterminable axial guide sleeve length into the clearance region 6 remaining between the casting piston 4 and the casting chamber inner wall 1c.
  • the sealing element 10 is arranged in this example in the region of the inner front end of this guide sleeve 11 'and embedded therein.
  • the relief annular groove 17 and the relief channel 18, which may also be optionally provided in this variant of the casting unit, are located in the region of a relatively short axial part of the guide sleeve support of the casting piston 4 pointing outwards from the actual casting chamber hollow cylinder 1a.
  • the guide sleeve tempering device 12 Since in this embodiment, the majority of the guide sleeve 11 'is in the casting chamber 2 and therefore can be heated during operation of the present there melting material, the guide sleeve tempering device 12, as shown in the Fig. 1 to 3 is shown, optional omitted.
  • pouring unit corresponds to that of Fig. 4 with the exception that in this case the tempering device 13 is not provided for active G machinekolbentemper réelle.
  • This casting unit is suitable, for example, for applications which do not require active heating of the casting chamber 2.
  • This variant can be used, for example, for applications in which the complete casting unit dips into a melt bath, so that the casting unit is heated passively via the hot melt material, ie the hot, liquid melt material surrounds the casting chamber 2 or the casting chamber body 1 and holds them or this warm from the outside.
  • this can be introduced via the casting material inlet 8 from the melt bath into the casting chamber 2 Melting material keep the casting chamber 2 warm from the inside, as is the case with the other embodiments shown.
  • a casting piston having a non-circular cross-section and a correspondingly designed passage opening may be used, and / or the guide sleeve may be realized as a component separately from the casting chamber body, possibly as a component mounted thereon ,
  • the casting material inlet and the casting material outlet may be interchanged with respect to their positions in the embodiment shown or may open into the casting chamber at any other positions.
  • the casting piston may, in corresponding embodiments, also transversely to the longitudinal direction of the G fauxmaterialauslasses and / or the pouring material inlet into the pouring chamber.
  • a heater for example, an electric heater with electric heating elements.
  • the clearance area is formed as a circumferentially continuous annular gap, i. the casting piston moves freely in the casting chamber 2 without support.
  • a point or line guide of the casting piston may be provided within the casting chamber, i.
  • the casting piston engages with an outer circumferential surface along one or more line contacts and / or along one or more point contacts against a transverse to the casting piston movement direction opposite boundary wall of the casting chamber.
  • the illustrated embodiment could be used in the sense of line contact e.g. be modified so that the hollow cylinder inner wall 1c or the casting piston outer circumferential surface 4b arranged distributed on the circumference, is provided with axial direction component extending guide webs, which keep the casting piston 4 guided within the casting chamber 2 in its axial movement. These guide webs then divide the annular gap clearance 6 into several corresponding segments.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Claims (8)

  1. Unité d'injection pour une machine de coulée sous pression, comprenant
    - un corps de chambre de coulée (1), qui comporte une chambre de coulée (2) susceptible d'être remplie avec un matériau de coulée, comportant une entrée pour matériau de coulée (8) et une sortie pour matériau de coulée (3), et
    - un piston de coulée (4), déplaçable en avançant dans la chambre de coulée dans une direction longitudinale de piston, afin d'extraire hors de la chambre de coulée le matériau de coulée sous pression via la sortie pour matériau de coulée, et déplaçable en reculant, grâce à quoi le matériau de coulée est susceptible d'être amené dans la chambre de coulée via l'entrée pour matériau de coulée,
    - dans laquelle le piston de coulée (4) s'étend depuis l'extérieur jusque dans la chambre de coulée (2) en traversant une ouverture traversante (5) du corps de chambre de coulée (1), dans laquelle une zone d'espace libre (6) de la chambre de coulée est formée entre une surface enveloppe extérieure (4b) du piston de coulée déplaçable en avançant dans la chambre de coulée, et une surface de paroi intérieure (1c), opposée à celle-ci transversalement à la direction longitudinale du piston, du corps de chambre de coulée, du fait qu'une section transversale extérieure (d) du piston de coulée est d'autant plus petite qu'une section transversale intérieure (D) du corps de chambre de coulée,
    caractérisée en ce que
    - il est prévu un moyen de températion de piston (14) pour tempérer de manière active et au moins localement le piston de coulée, qui est conçu pour tempérer de façon active le piston de coulée selon un profil de température prédéterminé le long d'au moins une partie de sa longueur déplaçable en avançant dans la chambre de coulée, et/ou
    - un élément d'étanchéité (10) est agencé sur une face intérieure, tournée vers la chambre de coulée, de l'ouverture traversante (5) pour étancher la traversée du piston de coulée de telle façon que, sous la pression du matériau de coulée dans la chambre de coulée (2) il vient se presser avec étanchement contre le piston de coulée (4) traversant, dans laquelle un diamètre extérieur (d) du piston de coulée (4) correspond sensiblement à un diamètre de l'ouverture traversante (5), et/ou
    - le piston de coulée (4) présente un diamètre extérieur (d) qui est constant au moins sur une partie du piston de coulée (4) déplaçable jusque dans la chambre de coulée (2) en traversant l'ouverture traversante (5), et correspond sensiblement au diamètre de l'ouverture traversante (5), dans laquelle un intervalle annulaire demeure entre le tronçon du piston de coulée qui se déplace en entrant dans la chambre de coulée (2) et la surface de paroi intérieure radialement opposée (1c) du corps de chambre de coulée, qui présente un diamètre intérieur (D) plus grand que le diamètre extérieur (d) du piston de coulée (4), à titre de zone d'espace libre de la chambre de coulée (2), et qui appartient en permanence au volume de la chambre de coulée qui n'est pas isolé par le piston de coulée (4).
  2. Unité de coulée selon la revendication 1, caractérisée en outre en ce que l'entrée pour matériau de coulée débouche dans la zone de l'espace libre et/ou dans la sortie pour matériau de coulée.
  3. Unité de coulée selon la revendication 2, caractérisée en outre en ce que l'entrée pour matériau de coulée et/ou la conduite d'amenée pour matériau de coulée (7) qui lui est associée, est pourvue d'un élément d'isolation (9), qui assure une fermeture à l'encontre d'une fuite du matériau de coulée hors de la chambre de coulée via l'entrée pour matériau de coulée.
  4. Unité de coulée selon l'une des revendications 1 à 3, caractérisée en outre en ce que le corps de chambre de coulée comprend un cylindre creux (1a), et l'ouverture traversante est prévue à une extrémité frontale du cylindre creux.
  5. Unité de coulée selon la revendication 4, caractérisée en outre en ce que la sortie pour matériau de coulée et/ou l'entrée pour matériau de coulée est prévue à l'extrémité frontale, opposée à l'ouverture traversante, du cylindre creux ou bien à une surface enveloppe cylindrique du cylindre creux.
  6. Unité de coulée selon l'une des revendications 1 à 5, caractérisée en outre en ce qu'il est prévu une douille de guidage (11) pour le piston de coulée, qui s'étend vers l'extérieur depuis un côté extérieur, détourné de la chambre de coulée, de l'ouverture traversante et/ou vers l'intérieur depuis un côté intérieur, tourné vers la chambre de coulée, de l'ouverture traversante jusque dans la chambre de coulée.
  7. Unité de coulée selon l'une des revendications 1 à 6, caractérisée en outre en ce qu'il est prévu un moyen de températion pour la douille de guidage (12) et/ou un moyen de températion pour la chambre de coulée (13) pour la températion active de la chambre de coulée.
  8. Unité de coulée selon l'une des revendications 1 à 7, caractérisée en outre en ce qu'il est prévu une gorge annulaire de décharge (17) sur une paroi intérieure, tournée vers le piston de coulée, de l'ouverture traversante ou de la douille de guidage, et un canal de décharge (18) qui mène depuis la gorge annulaire de décharge jusqu'au côté extérieur du corps de chambre de coulée.
EP10787072.7A 2009-11-30 2010-11-24 Ensemble d'injection pour machine a couler sous pression Active EP2506999B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
HRP20170511TT HRP20170511T1 (hr) 2009-11-30 2010-11-24 Injektorska jedinica stroja za tlačno lijevanje u kalupu
PL10787072T PL2506999T3 (pl) 2009-11-30 2010-11-24 Jednostka odlewnicza do maszyny odlewniczej ciśnieniowej

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009057197A DE102009057197B3 (de) 2009-11-30 2009-11-30 Gießeinheit für eine Druckgießmaschine
PCT/EP2010/068123 WO2011064253A1 (fr) 2009-11-30 2010-11-24 Unité de coulée destinée à une machine à coulée sous pression

Publications (2)

Publication Number Publication Date
EP2506999A1 EP2506999A1 (fr) 2012-10-10
EP2506999B1 true EP2506999B1 (fr) 2017-01-04

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EP10787072.7A Active EP2506999B1 (fr) 2009-11-30 2010-11-24 Ensemble d'injection pour machine a couler sous pression

Country Status (13)

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US (1) US9233417B2 (fr)
EP (1) EP2506999B1 (fr)
JP (2) JP5947216B2 (fr)
KR (1) KR101746786B1 (fr)
CN (1) CN102712039B (fr)
BR (1) BR112012013027B1 (fr)
DE (1) DE102009057197B3 (fr)
ES (1) ES2617328T3 (fr)
HR (1) HRP20170511T1 (fr)
MX (1) MX2012006125A (fr)
PL (1) PL2506999T3 (fr)
RU (1) RU2570266C2 (fr)
WO (1) WO2011064253A1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
EP3919204A1 (fr) 2020-06-04 2021-12-08 Oskar Frech GmbH + Co. KG Unité de coulée pour une machine de coulée sous pression

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DE102009057197B3 (de) * 2009-11-30 2011-05-19 Oskar Frech Gmbh + Co. Kg Gießeinheit für eine Druckgießmaschine
DE102013105435B3 (de) * 2013-05-27 2014-07-10 Schuler Pressen Gmbh Gießventil mit einem Nachverdichtungskolben
CN103752796A (zh) * 2014-02-13 2014-04-30 江苏博众汽车部件有限公司 压铸用活塞气缸
DE102015224411B4 (de) 2015-12-07 2019-08-22 Volkswagen Aktiengesellschaft Rückschlagventil
US12312143B2 (en) * 2019-06-28 2025-05-27 Alka Global Ltd Pouch for a food product
DE102020207704A1 (de) 2020-06-22 2021-12-23 Oskar Frech Gmbh + Co. Kg Druckgießmaschine und Betriebsverfahren

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US3814170A (en) * 1971-06-08 1974-06-04 F Kahn Apparatus for melting and casting material under pressure
DE3248423A1 (de) * 1982-12-28 1984-06-28 Gebrüder Bühler AG, Uzwil Verfahren zum druckgiessen und druckgiessmaschine zur ausfuehrung dieses verfahrens

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3919204A1 (fr) 2020-06-04 2021-12-08 Oskar Frech GmbH + Co. KG Unité de coulée pour une machine de coulée sous pression
DE102020207016A1 (de) 2020-06-04 2021-12-09 Oskar Frech Gmbh + Co. Kg Gießeinheit für eine Druckgießmaschine
US11376656B2 (en) 2020-06-04 2022-07-05 Oskar Frech Gmbh + Co. Kg Casting unit for a die casting machine

Also Published As

Publication number Publication date
US20120273530A1 (en) 2012-11-01
HRP20170511T1 (hr) 2017-06-02
RU2012124327A (ru) 2014-01-10
JP2015096279A (ja) 2015-05-21
EP2506999A1 (fr) 2012-10-10
PL2506999T3 (pl) 2017-07-31
KR20120098820A (ko) 2012-09-05
BR112012013027A2 (pt) 2016-11-22
JP5947216B2 (ja) 2016-07-06
CN102712039B (zh) 2015-07-29
CN102712039A (zh) 2012-10-03
ES2617328T3 (es) 2017-06-16
KR101746786B1 (ko) 2017-06-13
WO2011064253A1 (fr) 2011-06-03
RU2570266C2 (ru) 2015-12-10
US9233417B2 (en) 2016-01-12
DE102009057197B3 (de) 2011-05-19
MX2012006125A (es) 2012-07-23
BR112012013027B1 (pt) 2022-07-19
JP2013512106A (ja) 2013-04-11

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