EP3401037B1 - Moule destiné à la fabrication d'un noyau de coulé - Google Patents

Moule destiné à la fabrication d'un noyau de coulé Download PDF

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Publication number
EP3401037B1
EP3401037B1 EP18171173.0A EP18171173A EP3401037B1 EP 3401037 B1 EP3401037 B1 EP 3401037B1 EP 18171173 A EP18171173 A EP 18171173A EP 3401037 B1 EP3401037 B1 EP 3401037B1
Authority
EP
European Patent Office
Prior art keywords
mould
shell
guides
shells
guide
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
EP18171173.0A
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German (de)
English (en)
Other versions
EP3401037A1 (fr
Inventor
Olaf Stuhldreier
Pascal Decker
Heinrich Dr. Fuchs
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.)
Martinrea Honsel Germany GmbH
Original Assignee
Martinrea Honsel Germany GmbH
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Filing date
Publication date
Application filed by Martinrea Honsel Germany GmbH filed Critical Martinrea Honsel Germany GmbH
Publication of EP3401037A1 publication Critical patent/EP3401037A1/fr
Application granted granted Critical
Publication of EP3401037B1 publication Critical patent/EP3401037B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C17/00—Moulding machines characterised by the mechanism for separating the pattern from the mould or for turning over the flask or the pattern plate
    • 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
    • B22C—FOUNDRY MOULDING
    • B22C13/00—Moulding machines for making moulds or cores of particular shapes
    • B22C13/12—Moulding machines for making moulds or cores of particular shapes for cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
    • B22C7/06—Core boxes

Definitions

  • the invention relates to a mold for producing a casting core, which maps coolant channels and coolant inflows and outflows of a cooling jacket of an electric motor.
  • the production of the cooling jacket in a casting process may be useful.
  • this type of production requires a suitable casting core, which must be placed within the casting mold in order to map the coolant channels and also the necessary coolant inflows and outflows in terms of casting technology.
  • the casting core required for this is also designed to be relatively complex.
  • the JP 2015 044217 A discloses a mold for producing a casting core with a core mold space that can be filled with core material. Eight molded shells can be moved between a radially outer position with a closed outer circular shape and an inwardly displaced position. For this purpose, the first four molded shells, in each case two of the four molded shells lying opposite each other, and subsequently the remaining four second molded shells each arranged between the first molded shells, wherein two of the four molded shells also lying opposite each other, are displaced radially inward into the gap which arises. A respective demolding technique with guides, which are fastened to the mold shells, is provided for demolding the casting core. Other forms for producing a casting core are from the US 2008/0274289 A1 as well as the JP H07 266000 A known.
  • the aim is therefore to enable the molding of a casting core, which maps the coolant channels and coolant inflows and outflows of the cooling jacket of an electric motor, and which can be removed from the mold easily and non-destructively after molding.
  • Such a cooling jacket typically has coolant channels shaped in a meandering manner in its interior, which combine to form an essentially cylindrical shape.
  • the core mold space filled with core material during the production of the casting core is primarily determined by an outer shape and an inner shape.
  • the outer shape forms the outer wall of the core molding space
  • the inner shape forms the inner wall of the core molding space.
  • the cylindrical inner shape is enclosed over its entire circumference by the cylindrical outer shape.
  • Components of the inner mold are two first mold shells and two second mold shells, with all four mold shells jointly shaping and delimiting the inner wall of the core mold space, and wherein the second mold shells are each movably arranged between the first mold shells.
  • Part of the inner mold is a first demolding mechanism, which is arranged between the first mold shells and designed to move them towards one another. Also part of the inner mold is a second demolding mechanism, which is arranged between the second mold shells and is designed to move these second mold shells toward one another.
  • this one in the direction the central axis comprises longitudinally movably arranged shell supports with two guides arranged thereon, the one of the first and the other of the two first molded shells being displaceably mounted on one guide, and the longitudinal directions of these two guides converge to one another. Converging means that the virtual axes of the two longitudinal directions meet at a point outside the shell carrier.
  • the second demoulding mechanism it is proposed that it comprise a shell support arranged to be longitudinally movable in the direction of the central axis, with two guides arranged thereon, the one of the two and the other of the two second shell shells being displaceably mounted on one guide, and wherein the longitudinal directions of these two guides converge to one another. Converging means that the virtual axes of the two longitudinal directions meet at a point outside the shell carrier.
  • the two shell supports are longitudinally movable in the direction of the central axis, for. B. by the one shell carrier is slidably disposed in the other shell carrier.
  • the guides on one shell carrier and the guides on the other shell carrier are each aligned such that they converge in the same direction or both diverge in the opposite direction.
  • stops are formed on the shell supports, which limit the mutual longitudinal mobility of the shell carriers at least in the opposite direction to the convergence of the guides.
  • one of the shell carriers including the guides arranged on them is formed in one piece, whereas the other shell carrier including the guides arranged on it is made of two parts in the direction of the central axis formed one behind the other carrier sections.
  • the division of the guide arranged on the other shell carrier is such that guide sections are present on each of the carrier sections, the guide sections being aligned with one another.
  • the one-piece shell support is preferably divided into two segments by a longitudinal slot, and the segments are connected to one another only by means of webs.
  • one of the shell carriers has a frustoconical basic shape
  • the other shell carrier has a basic shape comprising a cylinder and arms projecting radially from the cylinder.
  • the cylinder is longitudinally guided in the other, ie the frustoconical shell support. This contributes to a nested and thus compact structure of the two mechanisms, which pull the mold shell pairs back during demolding.
  • the guides have a T-shaped cross section and they engage in grooves provided with corresponding undercuts on the inner sides of the respective shaped shells.
  • the mutually facing inner sides of the first mold shells forming the first pair of mold shells successively each have an end section, a middle section and a further end section, and that the inner sides spring back on the middle section in comparison to the two end sections to form a recess.
  • Fig. 1 a casting core 1 made of casting sand.
  • the casting core 1 is used to cast coolant channels 2, a coolant inflow 3 and a coolant outflow 4 of a cooling jacket of an electric motor. If the casting core 1 is therefore placed within a casting mold, it defines those areas where the coolant channels 2, the coolant inflow 3 and the coolant outflow 4 are located after the casting has been completed.
  • Fig. 2 the form designed according to the invention is reproduced in its entirety. It consists of an outer shape 9 and an inner shape 10, both of which are arranged around a central axis A.
  • the core mold space whose shape in Fig. 1 is reproduced on the basis of the object produced (casting core), is accordingly also essentially cylindrical.
  • the outer wall of the core mold space is formed by the outer mold 9, and the inner wall of the core mold space by the inner mold 10.
  • the core material for. B. pouring a pouring sand into the core mold space, in which the pouring sand then solidifies to the pouring core.
  • the outer shape 9 is composed of a total of four segments, of which each segment extends approximately over a quarter circle. During the demolding, the four segments are moved radially outward, with the result that the cast core 1 produced is then exposed on its outside.
  • the internal mold 10 on the other hand, cannot be removed from the mold by a simple radial movement of individual segments, since these would collide with one another when they moved inwards towards the longitudinal axis A.
  • Fig. 4 also part of the inner mold 10 four segments, which add up to a cylinder and form the inner wall of the core mold space on their outer sides.
  • the four segments are not of uniform size and shape. Instead, two segments are designed as first molded shells 11 and two further segments as second molded shells 13. All four molded shells 11, 13 jointly delimit the inner wall of the core molding space, the second molded shells 13 each being arranged between the first molded shells 11. Since the second molded shells 13 are each arranged between the first molded shells 11, the two second molded shells 13 can be moved inwards towards the central axis A of the inner mold 10 without abutting the two first molded shells 11.
  • Fig. 4 and Fig. 4a the consequence of this different design is shown on the one hand of the molded shells 11 and on the other hand of the molded shells 13: the two second molded shells 13 have been moved radially inwards here, but are still located between the first molded shells 11. At the same time, the first molded shells 11 are located where in according to the operating position Fig. 4 the circumferential edges of the second molded shells 13 are each provided with a recess 17.
  • Fig. 4a The recesses 17 in the first molded shells 11 are achieved in that the mutually facing inner sides of the two first molded shells 11 each have an end section 18a, a middle section 19 and a further end section 18b in succession.
  • the inner sides of the first molded shells 11 spring back on the middle section 19 in comparison to the two end sections 18a, 18b, each forming the recess 17.
  • Fig. 4a additionally illustrated by the fact that one of the two second molded shells 13 is also sketched in dashed lines.
  • the Figures 4 and 10 which represent the mold shell pairs 11, 13 each in the operating position of maximum demolding, which recognize the different circumferential size of the mold shells 11 on the one hand and the mold shells 13 on the other hand.
  • the first molded shells 11 each extend over a larger circumferential angle than the second molded shells 13.
  • the first molded shells 11 can each extend over a circumferential angle of 100 °, while the second molded shells 13 each only over a circumferential angle of 80 °.
  • Components of the inner mold 10 are also two demolding mechanisms by means of which the mold shells 11, 13 can be moved in the direction of the central axis A.
  • a first demolding mechanism is arranged between the first mold shells 11 and designed to move these first mold shells 11 towards one another.
  • a second demolding mechanism is arranged between the second mold shells 13 and designed to move the second mold shells 13 towards one another.
  • the first shell support 20 has a basic shape composed of a central cylinder 21 and four arms 22 projecting radially therefrom.
  • the cylinder 21 is of such a size that it can slide essentially without play in a cylindrical opening 24 with which the second shell support 30 is provided.
  • Guides 25A, 25B are formed on the outer ends of the four arms 22.
  • the guides 25A, 25B are each of a T-shaped cross section and designed to be in undercut grooves 26 slide on the inner sides of the first molded shells 11 without play.
  • the first shell support 20 is formed in two parts from two support sections 20A, 20B arranged one behind the other in the direction of the axis A.
  • the carrier section 20A includes the cylinder 21 and the two radially projecting arms on which the two guide sections 25A are located.
  • the other, comparably shorter support section 20B comprises the other two arms 22, at the ends of which the two guide sections 25B are formed.
  • the design of the first shell carrier 20 is such that the guide sections 25A and 25B arranged on the same side of the axis A are aligned with one another and therefore together form a guide 25 which is interrupted in a central section.
  • the guide 25 composed of the guide portions 25A and 25B on one side of the axis A, and the guide 25 composed of the guide portions 25A and 25B on the other side of the axis A are inclined to the axis A, respectively, and they converge toward each other as in Fig. 5 the dashed line representing the direction of the guide 25 illustrates.
  • the in Fig. 6 reproduced second shell support 30 has a frustoconical basic shape. On its sides opposite one another with respect to the central axis A, guides 35 of T-shaped cross section are formed in each case, which engage in grooves 36 on the second molded shells 13 in a slidable manner. For this purpose, the grooves 36 on the second molded shells 13 are provided with corresponding undercuts.
  • the frustoconical shell carrier 30 has the cylindrical opening 24 in the center, in which the cylinder 21 of the other shell carrier 20 is mounted so as to be longitudinally movable.
  • the shell support 30 is formed in one piece and is divided by a longitudinal slot 38, which provides space for the arms 22, into two essentially semi-conical segments, these segments being connected to one another only via two webs 39.
  • a longitudinal slot 38 At the end of each longitudinal slot 38 there is a stop 37.
  • the corresponding counter stop 27 is located on the two longer arms 22 of the first shell carrier 20.
  • FIGS. 9a and 9b illustrate the operation of the two demolding mechanisms in two different operating positions: In the operating position according to Fig. 9a is moved inward by a longitudinal movement of the second shell support 30 in the direction of the central axis A, each of the two second molded shells 13. The first two molded shells 11 do not yet perform an inward movement at this time.
  • the demolding takes place in two stages (first the second molded shells 13, then only the first molded shells 11), but by means of a single, preferably continuously, drive movement.
  • This drive movement is achieved by a continuous longitudinal movement of the second shell carrier 30, which automatically takes along the first shell carrier 20 after a certain longitudinal path.
  • Materials for the inner mold 10 can be plastic, metal or wood.
  • Suitable as the core material of the casting core 1 are sand or free-flowing oxidic substances or mixtures of substances which contain inorganic or organic binders, these substances or mixtures of substances hardening either thermally and / or chemically.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Claims (9)

  1. Moule pour la fabrication d'un noyau de coulée (1), qui représente, en technique de coulée, des canaux de fluide de refroidissement (2) ainsi que des alimentations et des évacuations de fluide de refroidissement (3, 4) d'une enveloppe de refroidissement d'un moteur électrique, avec un espace de moulage de noyau pouvant être rempli de matériau de noyau, qui est conçu de manière globalement cylindrique autour d'un axe central (A), et dont la paroi externe est constituée d'un moule externe (9) et dont la paroi interne est constituée d'un moule interne (10) entouré sur toute sa circonférence par le moule externe, des composants du moule interne (10) étant :
    - deux premières coques de moule (11) et deux deuxièmes coques de moule (13), qui toutes les quatre délimitent la paroi interne de l'espace de moulage de noyau, les deuxièmes coques de moule (13) étant disposées chacune entre les premières coques de moule (11),
    - un premier mécanisme de démoulage, qui est disposé entre les premières coques de moule (11) et qui est conçu pour déplacer celles-ci l'une vers l'autre, le premier mécanisme de démoulage comprenant un support de coque (20) disposé de manière mobile longitudinalement dans la direction de l'axe (A), avec deux guidages (25) disposés dessus, moyennant quoi, sur un guidage, une première coque de moule et, sur l'autre guidage, l'autre des deux premières coques de moule (11) est montée de manière coulissante et les directions longitudinales des deux guidages (25) convergeant l'une vers l'autre,
    - un deuxième mécanisme de démoulage qui est disposé entre les deuxièmes coques de moule (13) et qui est conçu pour déplacer celles-ci l'une vers l'autre, le deuxième mécanisme de démoulage comprenant un support de coque (30) disposé de manière mobile longitudinalement dans la direction de l'axe (A), avec deux guidages (35) disposés dessus, moyennant quoi, sur un guidage, une coque de moule et, sur l'autre guidage, l'autre des deux deuxièmes coques de moule (13) est montée de manière coulissante et les directions longitudinales des deux guidages (35) convergeant l'une vers l'autre,
    un des supports de coque (30), y compris les guidages (35) disposés sur celui-ci, est réalisé d'une seule pièce et l'autre support de coque (20), y compris les guidages (25) disposés sur celui-ci, est réalisé en deux portions de support (20A, 20B) disposées l'une derrière l'autre dans la direction de l'axe (A).
  2. Moule selon la revendication 1, caractérisé en ce que les deux supports de coque (20, 30) sont conçus de manière mobile longitudinalement l'une vers l'autre dans la direction de l'axe (A).
  3. Moule selon la revendication 2, caractérisé en ce que les guidages (35) sur le support de coque (30) et les guidages (25) sur l'autre support de coque (20) convergent dans la même direction.
  4. Moule selon la revendication 2 ou 3, caractérisé par des butées (37, 27) réalisées sur les supports de coque (30, 20), qui limitent la mobilité longitudinale mutuelle des supports de coque (30, 20) au moins dans direction opposées à la convergence des guidages (35, 25).
  5. Moule selon la revendication 1, caractérisé par une division du guidage (25) disposé sur l'autre support de coque (20), de façon à ce que des portions de guidage (25A, 25B) soient présentes sur chacune des portions de support (20A, 20B), les portions de guidage (25A) d'une portion de support étant alignées avec les portions de guidage (25B) de l'autre portion de support.
  6. Moule selon la revendication 1 ou 5, caractérisé en ce que le support de coque (30) réalisé d'une seule pièce est divisé en deux segments par une fente longitudinale (38) et en ce que les segments sont reliés entre eux uniquement par l'intermédiaire de nervures (39).
  7. Moule selon l'une des revendications 2 à 6, caractérisé en ce qu'un des supports de coque (30) présente une forme de base tronconique, en ce que l'autre support de coque (20) présente une forme de base constituée d'un cylindre et de bras partant radialement de celui-ci, et en ce que le cylindre est guidé longitudinalement dans le support de coque (30) de forme tronconique.
  8. Moule selon l'une des revendications 2 à 7, caractérisé en ce que les guidages (35, 25) présentent une section transversale en forme de T et s'emboîtent dans des rainures à contre-dépouilles (36, 26) sur les côtés internes des coques de moule (13 resp. 11) correspondantes.
  9. Moule selon l'une des revendications précédentes, caractérisé en ce que les côtés internes orientés les uns vers les autres des deux premières coques de moule (11) comprennent chacune successivement une portion d'extrémité (18a), une portion centrale (19) et une autre portion d'extrémité (18b) et en ce que les côtés internes sont en retrait sur la portion centrale (19) par rapport aux deux portions d'extrémité (18a, 18b), formant ainsi un évidement (17).
EP18171173.0A 2017-05-09 2018-05-08 Moule destiné à la fabrication d'un noyau de coulé Active EP3401037B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017109921.2A DE102017109921A1 (de) 2017-05-09 2017-05-09 Form zum Herstellen eines Gießkerns

Publications (2)

Publication Number Publication Date
EP3401037A1 EP3401037A1 (fr) 2018-11-14
EP3401037B1 true EP3401037B1 (fr) 2020-01-22

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EP18171173.0A Active EP3401037B1 (fr) 2017-05-09 2018-05-08 Moule destiné à la fabrication d'un noyau de coulé

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US (1) US10384261B2 (fr)
EP (1) EP3401037B1 (fr)
CN (1) CN108856651A (fr)
DE (1) DE102017109921A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017105478A1 (de) * 2017-03-15 2018-09-20 Nemak, S.A.B. De C.V. Vorrichtung zum Schießen eines Gießkerns
DE102019110580A1 (de) 2019-04-24 2020-10-29 Nemak, S.A.B. De C.V. Vorrichtung und Verfahren zur Entnahme mindestens eines Kühlelementes aus einem wenigstens teilweise entformten Gussteil, Verfahren zur Einbringung mindestens eines Kühlelementes in einen Formkern einer Gussteilform, Kühlelement sowie Gussteil
CN110328348B (zh) * 2019-06-27 2021-12-31 广东银迪压铸有限公司 一种新能源汽车电机铝壳体的生产方法
CN110548856B (zh) * 2019-10-10 2021-09-07 北京航星机器制造有限公司 一种铝合金壳体铸件的复合铸型及其成型方法
CN114454308A (zh) * 2022-03-01 2022-05-10 北京利尔高温材料股份有限公司 一种稳流器滑动式内芯组合模具

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AT328177B (de) * 1973-11-23 1976-03-10 Osterreichische Symalen Ges M Vorrichtung zur formung von muffen
JPH07266000A (ja) * 1994-03-28 1995-10-17 Koyama:Kk 中子の成形型および中子
JP4445335B2 (ja) * 2004-06-21 2010-04-07 本田技研工業株式会社 金型装置及びシリンダブロックの製造方法
GB0514751D0 (en) * 2005-07-19 2005-08-24 Holset Engineering Co Method and apparatus for manufacturing turbine or compressor wheels
CN201132201Y (zh) * 2007-11-30 2008-10-15 李春奎 金属型内芯组合式浇铸模具
AT511230A1 (de) * 2011-04-15 2012-10-15 Ifw Manfred Otte Gmbh Formkern für formwerkzeug
JP2015044217A (ja) * 2013-08-28 2015-03-12 本田金属技術株式会社 中子成形装置
DE102014207333A1 (de) * 2014-04-16 2015-10-22 Mahle International Gmbh Vorrichtung zum Herstellen eines Kolbens

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Also Published As

Publication number Publication date
US10384261B2 (en) 2019-08-20
EP3401037A1 (fr) 2018-11-14
CN108856651A (zh) 2018-11-23
DE102017109921A1 (de) 2018-11-15
US20180326474A1 (en) 2018-11-15

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