EP2945760B1 - Moule permettant d'obtenir des pièces en fonte, en particulier des blocs-cylindres et des culasses, avec raccordement fonctionnel de la masselotte - Google Patents

Moule permettant d'obtenir des pièces en fonte, en particulier des blocs-cylindres et des culasses, avec raccordement fonctionnel de la masselotte Download PDF

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Publication number
EP2945760B1
EP2945760B1 EP14700923.7A EP14700923A EP2945760B1 EP 2945760 B1 EP2945760 B1 EP 2945760B1 EP 14700923 A EP14700923 A EP 14700923A EP 2945760 B1 EP2945760 B1 EP 2945760B1
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EP
European Patent Office
Prior art keywords
feeder
casting
casting mold
cast
mold
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
EP14700923.7A
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German (de)
English (en)
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EP2945760A1 (fr
Inventor
Henning Meishner
Alexander Wagner
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.)
Nemak Wernigerode GmbH
Original Assignee
Nemak Wernigerode GmbH
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Publication date
Application filed by Nemak Wernigerode GmbH filed Critical Nemak Wernigerode GmbH
Priority to PL14700923T priority Critical patent/PL2945760T3/pl
Publication of EP2945760A1 publication Critical patent/EP2945760A1/fr
Application granted granted Critical
Publication of EP2945760B1 publication Critical patent/EP2945760B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
    • B22C9/082—Sprues, pouring cups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
    • B22C9/088—Feeder heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D35/00—Equipment for conveying molten metal into beds or moulds

Definitions

  • the invention relates to a casting mold for producing cast parts from a metal melt, the casting mold defining a mold cavity and comprising molded parts that determine the shape of the cast part to be cast, as well as a feeder or separate pouring runners or pouring channels through which the melt enters the mold cavity when pouring got.
  • the casting mold according to the invention is set up specifically for the casting of cast parts using gravity casting.
  • a casting mold for a rail wheel for rail vehicles is known in which the melt is fed from a feeder to the mold cavity via a central pouring runner. This branches out into different channels that flow out on different horizontal levels.
  • Various measures have been taken to equalize the solidification, including components that act as cooling irons, through which the cooling is to be supported locally.
  • arc-shaped cooling irons are provided which cover the end face of the hub.
  • melt is supplied via a central channel from which various channels branch off, which in turn open out on different horizontal planes in the respective mold cavity. Separate runners, which bypass a section of the casting mold in which the melt solidifies prematurely, are not provided.
  • the mold cavity is delimited by molded parts that determine the shape of the cast part.
  • a feeder is provided, which is connected to the mold cavity of the casting mold via a pouring runner.
  • the pouring runner merges into various horizontally and vertically branching out from it pouring runners or channels, the mouths of which are each arranged in different levels of the mold cavity.
  • An annular cooling element is positioned between the two sections in such a way that melt can flow from one section to the other section via the opening enclosed by the cooling element.
  • the mold is filled via the connecting channels opening into the bottom of the mold chamber from bottom to top against the force of gravity.
  • the invention has achieved this object by a casting mold having the features specified in claim 1.
  • a metal melt is poured in a manner known per se via a feeder or separate pouring runners or pouring channels into a mold cavity that is delimited by a casting mold and depicting the cast part.
  • the casting mold includes molded parts that determine the shape of the cast part to be cast.
  • the melt is now via at least two connections, at least one of which is designed as an additional channel leading through one of the molded parts and independent of the contour of the cast part to be cast, in at least two areas that are assigned to different levels of the cast part to be cast, passed into the mold cavity.
  • a casting mold according to the invention for producing cast parts from a metal melt delimits a mold cavity and has mold parts that determine the shape of the cast part to be cast, as well as a feeder or separate pouring runners or pouring channels over which during pouring the molten metal enters the mold cavity.
  • the feeder or the pouring runners or pouring channels are connected to at least two areas of the mold cavity by at least two connections, at least one of which is designed as an additional channel leading through one of the molded parts and independent of the contour of the cast part to be cast , which are assigned to different levels of the component to be cast.
  • the melt can thus get into the casting mold in the usual way from the feeder or from the respective provided runner or pouring channels in the usual manner via channels which form part of this casting in the finished cast part.
  • the molten metal can flow into the mold cavity via at least one further connection which, as an additional channel, which is independent of the subsequent shape of the cast part to be produced, is guided through one of the mold parts that determine the contour of the cast part.
  • the thermal centers in the interior of the component are connected directly to the feeder connected to the casting mold through a suitable design of the components of a casting mold that determine the shape of the cast part. This takes place through additional feed channels, which are guided through the contouring molded parts and are connected in the critical areas to the component or to the mold cavity of the casting mold that determines the shape of the component.
  • All Understood parts of the casting mold through which the shape of the casting is determined. These include, in particular, casting cores that are inserted into the casting mold in order to produce recesses, cavities and the like on or in the cast part.
  • the invention thus provides a casting mold for producing cast parts, in which the mold cavity of the casting mold that depicts the cast part is filled with liquid metal, with molded parts being inserted into the mold cavity that depict the subsequent component geometry.
  • the invention is particularly suitable for gravity casting processes, including all conventional and dynamic chill casting processes, as well as low-pressure casting processes.
  • the invention is not only suitable for all casting processes in which the feeder is arranged on the upper side of the casting mold during solidification.
  • the feeder is connected in different component levels as seen in the direction of solidification, i.e. as seen in the direction in which the molten metal solidifies in the casting mold after it has been poured off.
  • feeder connections or feed channels are provided in the casting mold for this purpose, which do not belong to the component geometry and which can reach certain sections or areas of the mold cavity of the casting mold via the melt.
  • the feeder connections or channels formed in at least one of the contour-forming molded parts are guided in such a way that melt, bypassing the zone in which the respective cooling element causes accelerated solidification, is guided to a zone of the cast part in which solidification is supposed to proceed more slowly.
  • the zone of slow solidification is reliably supplied with melt even if there is a zone between the feeder and the relevant zone in which accelerated cooling is to take place and in which there is consequently the risk that material that has already solidified will enter the inflow hinders further melt to the zone that is supposed to solidify more slowly.
  • the invention complexly shaped cast parts can be produced in which solidifications that occur at different speeds at different rates are possible without the complexity of the casting mold increasing significantly.
  • the cast parts for the production of which the invention is particularly suitable include cylinder heads and cylinder blocks for internal combustion engines.
  • the invention ensures the production of flawless cast components, which makes it particularly suitable for casting cylinder blocks while meeting very high strength requirements in the area of the main bearing and in the area of the cylinder web.
  • the feeder core 1 acting as a gravity feeder forms the upper end of the respective casting mold G1, G2.
  • the feeder core 1 surrounds a feeder 2, via which the mold cavity 3, which is respectively surrounded by the casting mold G1, G2, is filled with melt.
  • the casting mold G1, G2 can also be filled in a manner known per se via separate pouring runners and pouring channels.
  • the molded parts 4a-4c as well as 5 and 6 are each formed in a manner known per se as casting cores and formed from molding sand. They are set in the mold cavity 3 delimited by the respective outer mold parts 7 of the casting molds G1, G2 and form recesses, cavities and channels in the casting to be cast. Accordingly, the mold parts 4a-4c and 5, 6 are destroyed when the casting mold G1, G2 is removed from the core. While the molded parts 4a-4c and 5, 6 determine the inner contour of the cast part to be cast, the outer parts 7 determine its outer contour.
  • the mold parts 5, 6 are positioned within the respective mold cavity 3 in such a way that their upper side adjoins the respective feeder core 1 and at the same time are arranged centrally in the mold cavity 3 of the respective casting mold G1, G2. In this way, the molded parts 5, 6 delimit two lateral areas 8, 9 from one another within the mold cavity 3, which areas represent, for example, the side walls of the cast part to be cast.
  • the respective molded parts 5, 6 with their upper side assigned to the feeder 2 each form the bottom of the relevant feeder 2.
  • the melt present in the feeder 2 is thus present on the respective molded part 5, 6.
  • the feeder 2 is in the usual way a, in Fig. 1 have their own bottom, indicated by a dashed line, in which through-openings are formed which are congruent with the openings of the lateral areas 8, 9 assigned to the feeder, so that when pouring through the Through openings the molten metal flows into the side area.
  • a cooling body 12, 13 is seated in each of the side surfaces of the molded part 5 assigned to the areas 8, 9 and adjacent to its lower edge as seen in the direction of gravity S.
  • a further cooling element 14, 15 is seated in each of the opposite side surfaces of the outer mold parts 7 assigned to the areas 8, 9. Melt that gets into the section K1, K2 between the associated heat sinks 14, 12 and 15, 13 consequently solidifies faster than the melt that is present in the direction of gravity S above and below these sections K1, K2.
  • a feeder channel 16 is formed in the mold part 5 in the casting mold G1, which extends in the vertical direction from the top side assigned to the feeder 2 of the molded part 5 extends to its underside assigned to the lower section 10 of the mold cavity 3.
  • the feeder channel 16 opens directly into the feeder 2. If the one already mentioned above, here only by a dashed line in Fig. 1 If the practical design indicated is selected, in which the feeder 2 has its own base, a separate through opening is of course formed in the base of the feeder 2 for the mouth of the feeder channel 16 assigned to the feeder 2.
  • the melt in the feeder 2 reaches the casting mold G1 not only via the lateral areas 8, 9 to the section 10 of the mold cavity 3, but also via the feeder channel 16 in the molded part 5. In this way, the melt flowing through the feeder channel 16 bypasses the critical sections K1, K2 and ensures a continuous supply of the section 10 with melt even if the melt has already solidified in the sections K1, K2 and the flow is obstructed there.
  • a feeder channel 23 is formed in the mold part 6 in the casting mold G2 , which extends in an upper section from the upper side of the molded part 6 assigned to the feeder 2 in the vertical direction to a branch point at which it branches into branches 24, 25 arranged alternately.
  • each of the branches 24, 25 can also be connected to the feeder 2 via its own feeder channel 23 molded into the molded part 6.
  • the branches 24, 25 lead in the lateral direction to one of the side surfaces of the molded part 6 that are respectively assigned to the areas 8, 9 flows out.
  • the sections 19, 20 present below the critical sections K1 'and K2' can be supplied with melt until the melt present in them solidifies.
  • the lower section 10 of the mold cavity 3 present below the molded part 6 is supplied with melt via this route, bypassing the critical sections K1 ', K2'.
  • the melt in the feeder 2 thus reaches the casting mold G2 not only via the lateral areas 8, 9 to the section 10 of the mold cavity 3, but also via the feeder channel 23 and its branches 24, 25. In this way, a continuous supply of the sections 10, 19, 20 of the casting mold G2 with melt is ensured even if the melt has already solidified in the sections K1 ', K2' and the flow is impeded there.
  • the invention thus makes it possible to reliably supply different areas and sections of the mold cavity with melt within the casting mold even when melt has already solidified in other areas or the flow of melt is hindered for other reasons. Accordingly, when casting cast parts according to the invention, some component areas can solidify significantly earlier than others. Thus, in the examples shown in the figures, the melts in the upper and inner areas connected to the feeder and connected to the feeder via the respective feeder channel 16, 23 can solidify more slowly than those in the Sections K1, K2 or K1 ', K2' existing melt. Independently of this, however, upper and lower areas can also be made possible, which solidify at the same time.
  • feeder channels are preferably molded in a contour-giving molded part arranged in the mold cavity.
  • this embodiment of the invention allows the cast parts to be removed from the outer molded parts in the partially solidified, i.e. not yet fully solidified state to free. The component removal can therefore also take place with the invention when the feeder 2 is still in a doughy state.

Claims (2)

  1. Moule de coulée pour couler des pièces à partir d'un métal fondu, où le moule (G1, G2) définit une cavité de moule (3), et comprend
    - des parties de moule de coulée (4-7) qui déterminent la forme de la pièce à couler, et
    - un dispositif d'alimentation (2), qui, vu dans la direction de la gravité, est situé au niveau du côté supérieur du moule de coulée, et par lequel le métal fondu passe pour arriver dans la cavité du moule (3) en raison de l'effet de la gravité pendant la coulée, et
    - au moins deux raccordements par lesquels le dispositif d'alimentation (2) est relié à au moins deux sections (K1, K2, K1', K2', 10) de la cavité du moule (3), lesquelles sections sont associées à différents plans de la pièce à couler, lesquels plans sont espacés dans la direction de la gravité (S),
    - où le premier des raccordements est formé par un canal (régions 8, 9) du moule de coulée (G1, G2), lequel canal est formé dans le moule de coulée et fait partie du moulage d'une partie de la pièce moulée,
    - où le deuxièmes des raccordements est guidé comme canal supplémentaire (canaux d'alimentation 16, 23) indépendant de la forme ultérieure de la pièce moulée à produire, à travers l'une des parties de moule (5, 29) qui déterminent le contour de la pièce moulée,
    - où au moins un corps de refroidissement (12-15 ; 17, 18, 21, 22) est disposé dans le moule de coulée (G1, G2), lequel corps de refroidissement (12-15 ; 17, 18, 21, 22) provoque un refroidissement accéléré du métal fondu qui atteint la cavité du moule (3) via le premier raccordement (régions 8, 9) pendant la coulée,
    - où le deuxième raccordement (canaux d'alimentation 16, 23) débouche dans un plan qui se trouve sous le corps de refroidissement (12-15 ; 17, 18, 21, 22) dans la direction d'entrée de la masse fondue, et
    - où la section (K1, K2, K1', K2') de la cavité du moule (3) reliée au dispositif d'alimentation (2) par le premier raccordement (régions 8, 9) est située dans la région du corps de refroidissement (12-15) ; 17,18, 21, 22), de sorte que le métal fondu entrant dans cette section (K1, K2, K1', K2') se solidifie à une vitesse accélérée par rapport au métal fondu entrant dans l'autre section respective (10) de la cavité du moule (3) via le deuxième raccordement (canaux d'alimentation 16, 23).
  2. Moule de coulée selon la revendication 1, caractérisé en ce qu'une paroi (26-29) est prévue entre le corps de refroidissement (12-15 ; 17, 18, 21, 22) et le canal supplémentaire (16, 23), laquelle paroi présente une conductivité thermique réduite par rapport au corps de refroidissement (12-15 ; 17, 18, 21, 22)
EP14700923.7A 2013-01-18 2014-01-20 Moule permettant d'obtenir des pièces en fonte, en particulier des blocs-cylindres et des culasses, avec raccordement fonctionnel de la masselotte Active EP2945760B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL14700923T PL2945760T3 (pl) 2013-01-18 2014-01-20 Forma odlewnicza do wytwarzania części odlewanych, w szczególności bloków cylindrów i korpusów cylindrów, z funkcjonalnym połączeniem zasilacza

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013100540 2013-01-18
PCT/EP2014/051030 WO2014111573A1 (fr) 2013-01-18 2014-01-20 Procédé et moule permettant d'obtenir des pièces en fonte, en particulier des blocs-cylindres et des culasses, avec raccordement fonctionnel de la masselotte

Publications (2)

Publication Number Publication Date
EP2945760A1 EP2945760A1 (fr) 2015-11-25
EP2945760B1 true EP2945760B1 (fr) 2022-01-05

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ID=49998295

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EP14700923.7A Active EP2945760B1 (fr) 2013-01-18 2014-01-20 Moule permettant d'obtenir des pièces en fonte, en particulier des blocs-cylindres et des culasses, avec raccordement fonctionnel de la masselotte

Country Status (12)

Country Link
US (1) US10688555B2 (fr)
EP (1) EP2945760B1 (fr)
JP (1) JP6227671B2 (fr)
KR (1) KR101805853B1 (fr)
CN (1) CN104936721B (fr)
BR (1) BR112015017065B1 (fr)
HU (1) HUE057875T2 (fr)
MX (1) MX2015009203A (fr)
PL (1) PL2945760T3 (fr)
RU (1) RU2634819C2 (fr)
WO (1) WO2014111573A1 (fr)
ZA (1) ZA201505175B (fr)

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WO2023248170A1 (fr) 2022-06-24 2023-12-28 Nemak, S.A.B. De C.V. Moule pour la production d'une pièce coulée constituée d'un alliage léger

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DE102017100805A1 (de) 2017-01-17 2018-07-19 Nemak, S.A.B. De C.V. Gießform zum Gießen von komplex geformten Gussteilen und Verwendung einer solchen Gießform
DE102018128020A1 (de) * 2018-11-09 2020-05-14 Bayerische Motoren Werke Aktiengesellschaft Kokille sowie Verfahren zum Herstellen eines Kurbelgehäuses
CN110202114A (zh) * 2019-07-22 2019-09-06 程郎 一种铝铸件压铸模具
EP3907018B1 (fr) * 2020-05-08 2023-03-29 Hamilton Sundstrand Corporation Gestion thermique dans la coulée à la cire perdue
US11654476B2 (en) * 2020-09-28 2023-05-23 GM Global Technology Operations LLC Hybrid core for manufacturing of castings
CN117505776B (zh) * 2024-01-05 2024-04-16 烟台冰轮智能机械科技有限公司 一种离心式压缩机底座铸造工艺

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Publication number Priority date Publication date Assignee Title
WO2023248170A1 (fr) 2022-06-24 2023-12-28 Nemak, S.A.B. De C.V. Moule pour la production d'une pièce coulée constituée d'un alliage léger
LU502349B1 (de) 2022-06-24 2024-01-09 Nemak Sab De Cv Gießform zur Herstellung eines aus einer Leichtmetalllegierung gebildeten Gussteils

Also Published As

Publication number Publication date
CN104936721A (zh) 2015-09-23
BR112015017065B1 (pt) 2019-07-09
MX2015009203A (es) 2016-03-21
BR112015017065A2 (pt) 2017-07-11
WO2014111573A1 (fr) 2014-07-24
RU2634819C2 (ru) 2017-11-03
US10688555B2 (en) 2020-06-23
KR20150105463A (ko) 2015-09-16
JP2016507381A (ja) 2016-03-10
HUE057875T2 (hu) 2022-06-28
US20150352631A1 (en) 2015-12-10
EP2945760A1 (fr) 2015-11-25
CN104936721B (zh) 2017-07-07
KR101805853B1 (ko) 2017-12-07
RU2015134546A (ru) 2017-03-03
PL2945760T3 (pl) 2022-05-09
ZA201505175B (en) 2016-07-27
JP6227671B2 (ja) 2017-11-08

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