EP3349923B1 - Procédé de fabrication d'une masselotte dans une machine à tirer les noyaux et boîte à noyau appropriée à la réalisation du procédé - Google Patents

Procédé de fabrication d'une masselotte dans une machine à tirer les noyaux et boîte à noyau appropriée à la réalisation du procédé Download PDF

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Publication number
EP3349923B1
EP3349923B1 EP16763261.1A EP16763261A EP3349923B1 EP 3349923 B1 EP3349923 B1 EP 3349923B1 EP 16763261 A EP16763261 A EP 16763261A EP 3349923 B1 EP3349923 B1 EP 3349923B1
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EP
European Patent Office
Prior art keywords
king
riser
membrane
mandrel
spring element
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.)
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Application number
EP16763261.1A
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German (de)
English (en)
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EP3349923A1 (fr
Inventor
Thomas Baginski
Jörg Schäfer
Thomas Schäfer
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.)
GTP Schaefer Giesstechnishe Produkte GmbH
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GTP Schaefer Giesstechnishe Produkte GmbH
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Publication date
Application filed by GTP Schaefer Giesstechnishe Produkte GmbH filed Critical GTP Schaefer Giesstechnishe Produkte GmbH
Priority to PL16763261T priority Critical patent/PL3349923T3/pl
Publication of EP3349923A1 publication Critical patent/EP3349923A1/fr
Application granted granted Critical
Publication of EP3349923B1 publication Critical patent/EP3349923B1/fr
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Classifications

    • 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
    • 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

Definitions

  • the invention relates to a method for producing a feeder intended for insertion into a casting mold used in the casting of metals, consisting of an inner cavity as feeder volume enclosing, consisting of an exothermic and / or insulating feeder material, in each case a lateral wall portion, a lid portion and a a feeder opening for connecting the inner cavity of the feeder body to the mold cavity of the mold during the casting process is formed in the bottom region and the inner cavity in at least a portion of a larger diameter than the diameter of the feeder opening and wherein the feeder body is produced by shooting in a core shooter, wherein for producing a one-piece feeder body with the predetermined shape in a two-piece core box n formed with a lower box and upper box a the outer contour of the feeder body reproducing cavity and.
  • the invention further relates to a core box suitable for producing a feeder body for use in the core shooting machine.
  • the feeders In foundry technology, it is often necessary to place additional feeders in the molds, whose feeder body fills with the liquid metal during the casting of the casting and compensates for volume deficits which occur during the solidification of the casting, in order to prevent voids being formed in the casting.
  • the feeders must be such that the liquid metal fed therein solidifies later than the casting, so that during the solidification process, a material transport can take place towards the casting, which tightly feeds the casting.
  • the feeders consist of an exothermic and / or insulating material.
  • Essential for the suitability of a feeder is its feeder module as the ratio of the feeder volume to Surface of the feeder, which is a geometric index of the rate of solidification of the occurred during the casting process in the inner cavity of the feeder metal.
  • the inner cavities of feeders are often cylindrical, which facilitates their manufacture in a core shooter because the cylindrical shape of the inner cavity to be formed in the feeder body does not impose any special requirements for the formation of the corresponding mold for a core shooter.
  • more advantageous with respect to the feeder module are internal cavities with a barrel-like or a spherical shape approximate shape, with more complicated cavity geometries can be sought for casting reasons, such as with respect to a feeder in the DE 295 10 068 U1 is described.
  • a method for producing a feeder with the features mentioned is also made CN 102 363 205 A and JP H11 277182 A known.
  • the invention is therefore based on the object, a method and a core box for producing a feeder with the predetermined shape specify, by means of which a one-piece feeder body can be produced in a simplified procedure.
  • the invention provides for this purpose a method in which in the cavity for the production of the inner cavity in the feeder body in its outer contour reversibly expandable king is set such that when shooting the feeder body whose wall portion, lid portion and bottom portion each by the in the space between the expanded king and the inner wall of the cavity introduced feeder material is formed, wherein the arranged in the bottom region of the feeder body feed opening is formed by a first diameter predetermining foot portion of the king and the king in its unexpanded position does not exceed the diameter of the foot portion, so that the finished shot feeder body can be removed from the king during demolding from the core box with its mouth opening.
  • the invention has the advantage that the core technology for producing the inner cavity of a feeder body produced in core shooting method is replaced by the king expandable in its outer contour, wherein the space occupied by the expanded king within the executed in the core box and the outer contour of the feeder body the cavity of the finished cavity Feeder body trains.
  • the expansion of the king is targeted by means of a separate drive and is reversible, so that the king resumes its original initial shape after the shooting process.
  • the feeder body Since the king in its initial shape, ie in its unexpanded position, the diameter of its opening defining the Jardinrö Stamm not surmounted, the feeder body is removable during removal from the king, the feeder body slides with its feeder opening over the full length of the king, or Alternatively, the king from the core box and thus out of the inner cavity of the feeder body produced by the shooting process can be moved out, so that the feeder body can be removed from the core box or from the lower and upper box.
  • the king consists of a solid mandrel and of a flexible membrane enclosing it and the membrane is deliberately expanded by setting the king in the cavity formed in the core box by means of an enlargement of its diameter.
  • the arrangement of the separate, made of a flexible material membrane gives the possibility to easily provide for a widening of the king.
  • a specification of the shape of the inner cavity of the subsequent feeder body can be made, so that different contours of the inner cavity can be made by appropriately manufactured feeders.
  • a gaseous or liquid medium is introduced into the intermediate space between the membrane and the fixed mandrel for the targeted widening of the membrane and is discharged from the intermediate space for demolding the shot feeder body.
  • the medium acts as a separate drive.
  • the expandable king may alternatively be provided that in the space between the membrane and a fixed mandrel extending over the length of the king, is arranged between two mandrel associated abutments supporting spring element whose diameter decreases in a Increased distance between the abutments and thereby expands the outer membrane targeted, and which regained its original elongated shape at a subsequent increase in the distance to the starting position of the king.
  • the spring element acts as a separate drive for the expansion of the king.
  • a fixed base plate associated with the mandrel and a relative to the base plate and the mandrel in the direction of the core box-bearing base plate movable clamping plate is associated with a first Abutment for the spring element forming projection along the mandrel in an opening located in the base plate is retractable and thereby shortens the distance to a formed at the upper end of the mandrel second abutment and causes the increase in diameter of the spring element.
  • the spring element embracing the mandrel is supported against the two abutments by a flange formed at each of its two ends and the expandable membrane extends between the flanges of the spring element.
  • the existing membrane of a flexible material is attached to the flanges of the spring element, so that the membrane follows the movements of the spring element respectively.
  • the spring element consists of a per se known basket spring, which automatically resumes its original shape after a induced by applying a voltage change in shape.
  • the invention further relates to a suitable for carrying out the manufacturing process core box, which consists of a top box and a lower box and an adjustable in the core box King;
  • the king is reversibly in his outer contour reversible by a drive king expandable.
  • the king consists of a solid mandrel and of a flexible membrane enclosing it and the membrane can be expanded by means of an enlargement of its diameter.
  • At least one line is connected to the intermediate space between the fixed mandrel and the membrane, by means of the targeted expansion of the king, a gaseous or liquid medium in the intermediate space can be introduced and led out of the intermediate space.
  • a spring element is arranged by the voltage of which the diameter of the membrane can be enlarged and returned by the subsequent end of the diameter of the membrane in the initial state.
  • the in Fig. 1 schematically shown core box 10 for producing a feeder body in Kernsch manvon consists of a lower box 11 and a top box 12, wherein the core box 10 is on a base plate 13. Inside the core box 10, a cavity 14 is formed together in the lower box 11 and upper box 12, which molds the outer contour of the feeder body to be produced. In this cavity protrudes into a king 15, which stands on a stationary base plate 16.
  • the king 15 consists of a fixedly connected to the base plate 16 mandrel 17, a mandrel 17 enclosing the spring element 18, which in the illustrated Embodiment can be considered as a conventional basket spring, and from a spring element 18 outside enclosing membrane 19, which in turn consists of a flexible material.
  • the spring element 18 has at its upper and lower ends in each case a circumferential flange 20, wherein the membrane 19 extends between these flanges 20 and is fixed to the flanges such that the membrane 19 follows the movements of the spring element 18 respectively.
  • the spring element 18 acts as a separate drive for the targeted expansion of the king 15th
  • clamping plate 27 is arranged, which is acted upon by a correspondingly movable feed rods 26 existing drive device 25.
  • the clamping plate 27 has a projection 23 which projects into an opening formed in the base plate 13 opening 24 and in each case in abutment against the lower flange 20 of the spring element 18.
  • the base plate 16 with the projection 23 along the mandrel 17 is displaced toward the base plate 13, so the projection 23 acts as a movable first abutment 22 for the spring element 18. Since at the same time the spring element 18 at the upper end to a second, at the upper end of the Dorns 17 fixed stationary abutment 21 is supported, the distance between the two abutments 21, 22 is shortened, so that an increase in the diameter of the spring element 20 is the result.
  • the resting on the spring element 18 diaphragm 19 expands accordingly, so that a gap 41 between the inner wall 40 of the formed in the core box 10 cavity 14 and the predetermined by the shape of the membrane 19 outer contour of the expanded king 15 results. Through this gap, the shape of the feeder to be produced with its feeder body is specified.
  • feed material 30 is injected, which is distributed in the intermediate space 41.
  • a feeder body 31 is formed with side wall portion 32, lid portion 33 and bottom portion 34, the inner cavity 36 corresponding to a nearly spherical shape corresponding to that of the king in the expanded form Fig. 2 occupied space.
  • a feeder opening 35 is formed by the diameter of the foot section 37 of the king 15 formed above the displaced lower flange 20 of the spring element 18.
  • the existing between the fixed mandrel 17 and the diaphragm 19 gap is widened by means of an insertable into the space liquid or gaseous medium, so that the outer diameter of the diaphragm 19 is increased accordingly and thus the Suiter volume of the feeder body 31 serving inner cavity forms.
  • the liquid or gaseous medium as a separate drive for the targeted expansion of the king 15. This is associated with a corresponding constructive simplification of the apparatus or core box required for carrying out the method.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Closures For Containers (AREA)

Claims (12)

  1. Procédé de fabrication d'une masselotte prévue pour insertion dans un moule utilisé lors de la coulée des métaux, composée d'un corps de masselotte (31) entourant un compartiment creux intérieur (36) en tant que volume de masselotte, composée d'un matériau de masselotte (30) exotherme et/ou isolant, respectivement d'une zone de paroi latérale (32), d'une zone de couvercle (33) ainsi que d'une zone de fond (34) tournée vers un compartiment creux de moule constitué dans le moule, dans la zone de fond (34) une ouverture de masselotte (35) étant constituée pour relier le compartiment creux intérieur (36) du corps de masselotte (31) au compartiment creux de moule du moule pendant l'opération de coulée et le compartiment creux intérieur (36) comportant dans au moins une partie de zone un diamètre plus grand que le diamètre de l'ouverture de masselotte (35) et le corps de masselotte (31) étant fabriqué par tirage dans une machine à tirer les noyaux, un compartiment creux (14) reproduisant le profil extérieur du corps de masselotte (31) étant constitué pour la fabrication d'un corps de masselotte d'une pièce (31) avec la conformation prédéfinie dans une boîte à noyaux (10) en deux parties avec une boîte inférieure (11) et une boîte supérieure (12), caractérisé en ce que dans ce compartiment creux (14) un cylindre à enveloppe (15) extensible de façon réversible dans son profil extérieur est mis en place pour la réalisation du compartiment creux intérieur (36) dans le corps de masselotte (31) de telle sorte que lors du tirage du corps de masselotte (31) dont la zone de paroi (32), la zone de couvercle (33) et la zone de fond (34) sont respectivement constituées par le matériau de masselotte (30) introduit dans l'espace intermédiaire (41) entre le cylindre à enveloppe élargi (15) et la paroi intérieure (40) du compartiment creux (14), l'ouverture de masselotte (35) disposée dans la zone de fond (34) du corps de masselotte (31) étant constituée par une
    section de pied (37) de le cylindre à enveloppe ((15) prédéterminant un premier diamètre et le cylindre à enveloppe (15) ne dépassant pas le diamètre de la section de pied (37) dans sa position non élargie de telle sorte que le corps de masselotte (31) définitivement tiré peut être enlevé du cylindre à enveloppe (15) lors du démoulage de la boîte à noyaux (10) avec son ouverture de masselotte (35).
  2. Procédé selon la revendication 1, pour lequel le cylindre à enveloppe (15) est composé d'un mandrin fixe (17) et d'une membrane (19) souple entourant celui-ci et la membrane (19) est élargie après mise en place du cylindre à enveloppe (15) dans le compartiment creux (14) constitué dans la boîte à noyaux (10) au moyen d'un agrandissement de son diamètre.
  3. Procédé selon la revendication 2, pour lequel un milieu gazeux ou liquide est introduit dans l'espace intermédiaire entre la membrane (19) et le mandrin fixe (17) pour élargir la membrane (19) et est vidé de l'espace intermédiaire pour démouler le corps de masselotte (31) tiré.
  4. Procédé selon la revendication 2, pour lequel dans l'espace intermédiaire entre la membrane (19) et le mandrin fixe (17) est disposé un élément à ressort (18) s'étendant sur la longueur du cylindre à enveloppe (15), s'appuyant entre deux butées (21, 22) attribuées au mandrin (17), dont le diamètre s'agrandit lors d'une réduction de la distance entre les butées (21, 22) et la membrane (19) située à l'extérieur s'élargit de ce fait et qui retrouve sa forme étirée à l'origine lors d'un agrandissement consécutif de la distance jusqu'à sa position initiale.
  5. Procédé selon la revendication 4, pour lequel une plaque de base fixe (16) avec le mandrin (17) fixé dessus et une plaque de serrage (27) mobile par rapport à la plaque de base (16) et au mandrin (17) en direction de la plaque
    de base (13) portant la boîte à noyaux (10) sont attribuées à la boîte à noyaux (10) posée avec sa boîte inférieure (11) sur une plaque de base (13), qui peuvent être introduites dans une ouverture (24) se trouvant dans la plaque de base (13) avec une saillie (23) formant une première butée (22) pour l'élément à ressort (18) le long du mandrin (17) et raccourcissent à cet effet la distance par rapport à une deuxième butée (21) constituée sur l'extrémité supérieure du mandrin (17) et entraînent l'agrandissement de diamètre de l'élément à ressort (18).
  6. Procédé selon la revendication 4 ou 5, pour lequel l'élément à ressort (18) enveloppant le mandrin (17) s'appuie avec une bride (20) constituée respectivement à ses deux extrémités contre les deux butées (21, 22) et la membrane extensible (19) passe entre les brides (20) de l'élément à ressort (18).
  7. Procédé selon la revendication 6, pour lequel la membrane (19) composée d'un matériau souple est fixée aux brides (20) de l'élément à ressort (18).
  8. Procédé selon l'une quelconque des revendications 4 à 7, pour lequel l'élément à ressort (18) est un ressort en panier.
  9. Boîte à noyaux (10) pour exécuter le procédé selon l'une quelconque des revendications 1 à 8, composée d'une boîte supérieure (12) et d'une boîte inférieure (11) et d'un cylindre à enveloppe (15) réglable dans la boîte à noyaux (10), pour lequel le cylindre à enveloppe (15) est un cylindre à enveloppe (15) extensible de façon réversible dans son profil extérieur.
  10. Boîte à noyaux (10) selon la revendication 9, pour laquelle le cylindre à enveloppe (15) est composé d'un mandrin fixe (17) et d'une membrane souple (19)
    entourant celui-ci et la membrane (19) est extensible au moyen d'un agrandissement de son diamètre.
  11. Boîte à noyaux (10) selon la revendication 10, pour laquelle au moins une conduite est raccordée à l'espace intermédiaire entre le mandrin fixe (17) et la membrane (19), au moyen de laquelle un milieu gazeux ou liquide peut être introduit dans l'espace intermédiaire et être évacué de l'espace intermédiaire.
  12. Boîte à noyaux (10) selon la revendication 10, pour laquelle un élément à ressort (18) est disposé dans l'espace intermédiaire entre le mandrin fixe (17) et la membrane (19) par la tension duquel le diamètre de la membrane (19) peut être agrandi et par la détente consécutive duquel le diamètre de la membrane (19) peut être ramené à l'état initial.
EP16763261.1A 2015-09-14 2016-09-09 Procédé de fabrication d'une masselotte dans une machine à tirer les noyaux et boîte à noyau appropriée à la réalisation du procédé Active EP3349923B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL16763261T PL3349923T3 (pl) 2015-09-14 2016-09-09 Sposób wytwarzania zasilacza w strzelarce i rdzennica odpowiednia do realizacji sposobu

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015115437.4A DE102015115437A1 (de) 2015-09-14 2015-09-14 Verfahren zur Herstellung eines Speisers in einer Kernschießmaschine und zur Durchführung des Verfahrens geeigneter Kernkasten
PCT/EP2016/071292 WO2017046007A1 (fr) 2015-09-14 2016-09-09 Procédé de fabrication d'une masselotte dans une machine à tirer les noyaux et boîte à noyau appropriée à la réalisation du procédé

Publications (2)

Publication Number Publication Date
EP3349923A1 EP3349923A1 (fr) 2018-07-25
EP3349923B1 true EP3349923B1 (fr) 2019-08-21

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EP16763261.1A Active EP3349923B1 (fr) 2015-09-14 2016-09-09 Procédé de fabrication d'une masselotte dans une machine à tirer les noyaux et boîte à noyau appropriée à la réalisation du procédé

Country Status (6)

Country Link
US (1) US10406595B2 (fr)
EP (1) EP3349923B1 (fr)
CN (1) CN108290206B (fr)
DE (1) DE102015115437A1 (fr)
PL (1) PL3349923T3 (fr)
WO (1) WO2017046007A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3695917B1 (fr) 2019-02-13 2021-11-03 GTP Schäfer Gießtechnische Produkte GmbH Insert de masselotte, procédé de fabrication d'un corps de masselotte pour un insert de masselotte ainsi que pièce maîtresse et boîte à noyaux destinés à la fabrication d'un corps de masselotte
DE102019104180A1 (de) * 2019-02-19 2020-08-20 Chemex Foundry Solutions Gmbh Einteiliger Speiserkörper zur Verwendung beim Gießen von Metallen
CN112756557A (zh) * 2020-12-31 2021-05-07 四川共享铸造有限公司 一种大气压力球形砂冒口套及制作方法
DE102021104435A1 (de) 2021-02-24 2022-08-25 Chemex Foundry Solutions Gmbh Vertikal geteilter Speiser zur Verwendung beim Gießen von Metallen in Gießformen sowie Verfahren zu dessen Herstellung

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Publication number Priority date Publication date Assignee Title
US4858673A (en) 1987-10-22 1989-08-22 Caldo Internationa, Inc. Riser construction
DE29510068U1 (de) 1995-06-28 1996-10-31 Chemex Gmbh Speiser zur Verwendung beim Gießen von geschmolzenem Metall
JPH11277182A (ja) 1998-03-30 1999-10-12 Hodogaya Ashland Kk 押湯用スリーブの製造方法
JP3344966B2 (ja) 1999-04-12 2002-11-18 保土谷アシュランド株式会社 押湯用スリーブの製造方法
CN201500764U (zh) * 2009-04-24 2010-06-09 江苏钢锐精密机械有限公司 出气冒口造型工装
CN102198489B (zh) * 2011-05-13 2013-01-02 无锡小天鹅精密铸造有限公司 一种保温冒口及其造型方法
CN102363205A (zh) 2011-11-11 2012-02-29 济南圣泉倍进陶瓷过滤器有限公司 球形冒口及制备该球形冒口的模具和方法
EP2925466B1 (fr) * 2012-11-29 2018-03-14 GTP-Schäfer Giesstechnische Produkte GmbH Procédé de fabrication d'une masselotte comportant un corps de masselotte exothermique ainsi qu'une coque extérieure isolante

Non-Patent Citations (1)

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Title
None *

Also Published As

Publication number Publication date
EP3349923A1 (fr) 2018-07-25
CN108290206B (zh) 2019-11-15
CN108290206A (zh) 2018-07-17
PL3349923T3 (pl) 2019-12-31
US10406595B2 (en) 2019-09-10
WO2017046007A1 (fr) 2017-03-23
US20180257132A1 (en) 2018-09-13
DE102015115437A1 (de) 2017-03-16

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