EP3429777B1 - Procédé de fabrication d'une masselotte comprenant un tissu en forme de filet recouvrant son ouverture de masselotte - Google Patents

Procédé de fabrication d'une masselotte comprenant un tissu en forme de filet recouvrant son ouverture de masselotte Download PDF

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Publication number
EP3429777B1
EP3429777B1 EP17709972.8A EP17709972A EP3429777B1 EP 3429777 B1 EP3429777 B1 EP 3429777B1 EP 17709972 A EP17709972 A EP 17709972A EP 3429777 B1 EP3429777 B1 EP 3429777B1
Authority
EP
European Patent Office
Prior art keywords
feeder
fabric
region
feeder body
positioning pins
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
EP17709972.8A
Other languages
German (de)
English (en)
Other versions
EP3429777A1 (fr
Inventor
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
Original Assignee
GTP Schaefer Giesstechnishe Produkte GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by GTP Schaefer Giesstechnishe Produkte GmbH filed Critical GTP Schaefer Giesstechnishe Produkte GmbH
Publication of EP3429777A1 publication Critical patent/EP3429777A1/fr
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Publication of EP3429777B1 publication Critical patent/EP3429777B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/08—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
    • 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
    • B22C9/084—Breaker cores

Definitions

  • the invention relates to a method for producing a feeder intended for insertion into a casting mold used in the casting of metals with a feeder body enclosing an inner cavity as feeder volume and consisting of an exothermic and / or insulating material, which has at least one lateral wall area and one in the Mold region facing the mold cavity with a feed opening arranged therein for connecting the inner cavity of the feeder body to the mold cavity of the casting mold during the casting process and having a mesh-like fabric that spans its feed opening and consists of a refractory material, in the course of the manufacture of the feeder in one Core shooter a piece of tissue of the net-like fabric is positioned in a model device that forms the shape of the feeder in a core box of the core shooter such that an edge region of the body en area of the later feeder positioned piece of fabric is at least partially bent towards the side wall area of the feeder body and the raised edge area when shooting the feeder is surrounded by the injected material and anchored in the material of the finished feeder body.
  • FIG DE 20 2015 104 554 U1 The structure of a feeder to be produced using the method according to the invention is shown in FIG DE 20 2015 104 554 U1 described.
  • the feeder known therefrom has the shape of a so-called head feeder, there is a mesh-like fabric on the feeder that spans its feed opening arranged in the base region and consists of a refractory material arranged. This is to ensure that when the feeder is used in a casting mold, due to the hot metal being washed around the network structure during the casting process, a metal layer penetrated by the fabric forms after the casting has solidified. This creates a defined material weakening in the bottom area of the feeder, so that the metallic feeder residue that remains after the casting has solidified is knocked off exactly in the course of this fabric layer.
  • To fix the net-like fabric on the feeder body is according to the DE 20 2015 104 554 U1 provided that the net-like fabric is stretched and fixed in a separate frame, the frame being attached to the feeder body in a suitable manner, preferably being
  • the production of a feeder having a network structure arranged in its base area has the disadvantage of complex production, since in addition to the conventional shooting of the feeder body in a core shooter, the separate frame with the network-like fabric stretched therein is also produced and in an additional assembly step on the ready shot feeder body must be attached.
  • a method with the features mentioned at the outset for producing a feeder is out DE 24 46 554 A1 known.
  • Other manufacturing processes are out DE 10 2014 115 848 A1 and DE 20 2015 104 553 U1 known.
  • the invention is therefore based on the object of simplifying the method for producing a feeder having a mesh-like fabric spanning its feed opening. This object is achieved, including advantageous refinements and developments of the invention, from the content of the patent claims, which follow this description.
  • the basic idea of the invention provides that the piece of fabric is pressed between positioning pins which are arranged on a base plate of the model device which defines the base area of the feeder body and which protrudes into the lateral wall area of the later feeder body, so that the edge area of the piece of fabric projecting beyond the surface enclosed by the positioning pins is bent up
  • the invention has the advantage that the mesh-like fabric that spans the feed opening is shot in during the manufacture of the feeder body in one process step, so that a separate frame for fixing the mesh-like fabric is dispensed with.
  • all that is required is an addition to the model device which is to be provided anyway for the production of the feeder body in the core shooter.
  • At least three positioning pins are arranged distributed over the circumference of the base region of the feeder body. It is expedient to arrange four positioning pins at a circumferential distance of 90 degrees each.
  • the feeder body specified by the model device is formed with an opening opposite its bottom region, which is closed by means of a stopper inserted in the opening and forming a lid region of the feeder body.
  • the model device comprises the base plate with the positioning pins arranged thereon and a model part detachably placed thereon for shaping the inner cavity of the finished shot feeder body, the model part for positioning the piece of fabric from the base is removed.
  • the one from the 3 and 4 Details of the ready-made feeder body 11 of a feeder 10 include a side wall area 12 surrounding an inner cavity 25 as a so-called feeder volume, and a lower floor area 13 in which a feed opening 14 is formed.
  • the one shot in a core shooter, not shown Feeder body 11 initially has an upper opening 15 opposite its bottom area 13 with feed opening 14, which is closed when a feeder 10 is finished by means of a plug 16 inserted therein ( Fig. 4 ).
  • the feed opening 14 is covered or covered by a piece of fabric 21 made of a refractory material, the edge area 22 of which is bent up in the direction of the side wall area 12 is fixed in the exothermic and / or insulating material forming the bottom area 13 of the feeder 10.
  • the shape of the feeder body 10 is characterized by one in one Fig. 1 apparent core box 30 of the core shooting machine with a lower box 31 and an upper box 32 located model device 17.
  • the model device 17 comprises a base plate 18 on which a cylindrical model part 20 rises and projects into a cavity 33 enclosed by the lower box 31 and upper box 32, so that when the material is shot into the core box 30, the inner cavity 25 of the feeder body 11 passes through the model part 20 and the feeder body 11 itself is formed by the free area of the cavity 33.
  • the cross-sectional area at the lower end of the model part 20 also forms the feed opening 14 formed in the bottom region 13 of the feeder body 11.
  • four positioning pins 19 are arranged at regular intervals over the circumference of the model device 17 on the base plate 18. How to do this Fig. 2 results, after the model part 20 has been removed from the base plate 18, a piece of fabric 21 is pressed between the positioning pins 19. Since the area of the piece of fabric 21 is set larger than the area enclosed by the positioning pins 19, the outer edge region of the piece of fabric 21 is bent upward by pressing the piece of fabric 21 between the positioning pins 19, so that it also results from the 3 and 4 resulting curved edge region 22 of the fabric piece 21 is formed.
  • the model part 20 is placed again on the base plate 18 of the model device 17, so that the exothermic and / or insulating material used to produce the feeder 10 can be shot into the core box.
  • the material envelops the standing model part 20 and forms the side wall region 12 of the finished feeder body 11.
  • the model part 20 is first opened through the upper opening 15 of the feeder body ( Figure 3 ) removed, because the feed opening 14 formed in the base area 13 could not slide over a remaining model part 20 due to the fabric piece 21 molded therein for demolding the feeder 10. In this respect, the removal of the model part 20 is necessary.
  • the feeder body 11 can be removed from the core box with the piece of fabric 21 molded into its base region 13. In this case, the positioning pins 19 leave open channels 23 in the base area 13 extending into the side wall area 12.
  • the piece of fabric 21 formed from the net-like fabric has a through hole 26 in its center to reduce the flow resistance with a smaller dimension than the feed opening 14 of the feeder 10.

Claims (5)

  1. Procédé de fabrication d'un alimentateur (10) prévu pour être employé dans un moule de coulée employé pour couler des métaux, comprenant un corps d'alimentateur (11) composé de matériau exotherme et/ou isolant, entourant une cavité intérieure (25) en tant que volume d'alimentateur, lequel présente au moins une partie de paroi latérale (12) ainsi qu'une partie de fond (13) avec une ouverture d'alimentateur (14) disposée à l'intérieur pour relier la cavité intérieure (25) du corps d'alimentateur (11) à la cavité de moule du moule de coulée pendant la coulée, et présente un tissu de type filet, en un matériau ininflammable, recouvrant son ouverture d'alimentateur (14), dans lequel dans le cadre de la fabrication de l'alimentateur dans une machine à tirer les noyaux, une pièce de tissu (21) du tissu de type filet est positionnée de telle façon dans un dispositif de modelage (17) donnant la forme de l'alimentateur (10) dans une caisse de noyaux (30) de la machine à tirer les noyaux, que la bordure (22) de la pièce de tissu (21) positionnée dans la partie de fond (13) du futur alimentateur (10) soit pliée vers le haut au moins partiellement en direction de la partie de paroi latérale (13) du corps d'alimentateur (11) et la bordure (22) pliée vers le haut est entourée par le matériau tiré lors du tirage de l'alimentateur (10) et ancrée dans le matériau de l'alimentateur (10) tiré terminé, caractérisé en ce que la pièce de tissu (21) est poussée entre des tiges de positionnement (19) verticales dans la partie de paroi (12) latérale du futur corps d'alimentateur (11), disposées contre une plaque de fond (18) du dispositif de modelage (17) définissant la partie de fond (13) du corps d'alimentateur (11),
    de telle sorte que la bordure (22) de la pièce de tissu (21) en saillie au-dessus de la surface entourée par les tiges de positionnement (18) soit pliée vers le haut.
  2. Procédé selon la revendication 1, dans lequel au moins trois tiges de positionnement (19) sont disposées réparties sur le pourtour de la partie de fond (13) du corps d'alimentateur (11).
  3. Procédé selon la revendication 1, dans lequel au moins quatre tiges de positionnement (19) sont disposées réparties sur le pourtour de la partie de fond (13) du corps d'alimentateur (11).
  4. Procédé selon l'une des revendications 1 à 3, dans lequel le corps d'alimentateur (11) prédéfini dans sa forme par le dispositif de modelage (17) est formé avec une ouverture (15) supérieure opposée à sa partie de fond (13), qui est fermée au moyen d'un bouchon (16) formant une partie de couvercle du corps d'alimentateur (10), inséré dans l'ouverture (15).
  5. Procédé selon l'une des revendications 1 à 4, dans lequel le dispositif de modelage (17) comprend la plaque de fond (18) avec les tiges de positionnement (19) raccordées dessus et une partie de modelage (20) placée de manière séparable dessus pour former la cavité intérieure (25) du corps d'alimentateur (11) tiré terminé, dans lequel la partie de modelage (20) est retirée de la plaque de fond (18) pour positionner la pièce de tissu (21).
EP17709972.8A 2016-03-18 2017-03-10 Procédé de fabrication d'une masselotte comprenant un tissu en forme de filet recouvrant son ouverture de masselotte Active EP3429777B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016105106 2016-03-18
PCT/EP2017/055663 WO2017157788A1 (fr) 2016-03-18 2017-03-10 Procédé de fabrication d'une masselotte comprenant un tissu en forme de filet recouvrant son ouverture de masselotte

Publications (2)

Publication Number Publication Date
EP3429777A1 EP3429777A1 (fr) 2019-01-23
EP3429777B1 true EP3429777B1 (fr) 2019-12-18

Family

ID=58265977

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17709972.8A Active EP3429777B1 (fr) 2016-03-18 2017-03-10 Procédé de fabrication d'une masselotte comprenant un tissu en forme de filet recouvrant son ouverture de masselotte

Country Status (4)

Country Link
US (1) US10525526B2 (fr)
EP (1) EP3429777B1 (fr)
ES (1) ES2769203T3 (fr)
WO (1) WO2017157788A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3429777B1 (fr) 2016-03-18 2019-12-18 GTP Schäfer Gießtechnische Produkte GmbH Procédé de fabrication d'une masselotte comprenant un tissu en forme de filet recouvrant son ouverture de masselotte

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE7411720L (fr) 1973-09-28 1975-04-01 Namco Aikoh Ltd
US4798615A (en) 1985-10-19 1989-01-17 Kubota Ltd. Process for making a filter for molten metal having a high melting point
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
DE202013104863U1 (de) 2013-10-30 2013-11-15 GTP Schäfer Gießtechnische Produkte GmbH Speisereinsatz mit einem in seinem Deckelbereich angeordneten Stopfen
DE202015104553U1 (de) 2015-08-27 2015-09-15 GTP Schäfer Gießtechnische Produkte GmbH Brechkern mit einem dessen Durchtrittsöffnung durchsetzenden netzartigen Gewebe
DE202015104554U1 (de) 2015-08-27 2015-09-15 GTP Schäfer Gießtechnische Produkte GmbH Speiser mit einem dessen Speiseröffnung überspannenden netzartigen Gewebe
EP3429777B1 (fr) 2016-03-18 2019-12-18 GTP Schäfer Gießtechnische Produkte GmbH Procédé de fabrication d'une masselotte comprenant un tissu en forme de filet recouvrant son ouverture de masselotte

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
EP3429777A1 (fr) 2019-01-23
ES2769203T8 (es) 2020-08-06
ES2769203T3 (es) 2020-06-25
US10525526B2 (en) 2020-01-07
WO2017157788A1 (fr) 2017-09-21
US20190105706A1 (en) 2019-04-11

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