EP1729904A2 - Alimentateur a ecran ou a chevilles - Google Patents

Alimentateur a ecran ou a chevilles

Info

Publication number
EP1729904A2
EP1729904A2 EP05728689A EP05728689A EP1729904A2 EP 1729904 A2 EP1729904 A2 EP 1729904A2 EP 05728689 A EP05728689 A EP 05728689A EP 05728689 A EP05728689 A EP 05728689A EP 1729904 A2 EP1729904 A2 EP 1729904A2
Authority
EP
European Patent Office
Prior art keywords
feeder
feeder body
insert according
absorption device
energy absorption
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.)
Withdrawn
Application number
EP05728689A
Other languages
German (de)
English (en)
Inventor
Udo Skerdi
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.)
AS Luengen GmbH and Co KG
Original Assignee
AS Luengen 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 AS Luengen GmbH and Co KG filed Critical AS Luengen GmbH and Co KG
Publication of EP1729904A2 publication Critical patent/EP1729904A2/fr
Withdrawn legal-status Critical Current

Links

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

Definitions

  • the invention relates to a feeder insert for inserting into a casting mold used for casting metals with a feeder body extending along a main feeder axis and having a feeder cavity, with an underside which can be inserted into the casting mold and an upper side opposite the underside.
  • feeders When producing molded parts in the foundry, liquid metal is poured into a casting mold.
  • the volume of the filled material decreases during the solidification process. Therefore, so-called feeders, i.e. Open or closed rooms, inserted in or on the casting mold, to compensate for the volume deficit when the casting solidifies and to prevent the formation of voids in the casting.
  • the feeders are connected to the casting or to the endangered casting area and are usually arranged above or on the side of the mold cavity.
  • a holding device is usually provided at the points at which a feeder insert is to be attached, e.g. a mandrel to fix the position of the feeder insert.
  • a molding material usually molding sand
  • the molding material is then compressed so that the feeder is enclosed by the compressed molding material. Relatively high compression pressures are used to compress the molding material. There is therefore a risk that the feeder insert will not withstand the crushing forces occurring during compression and break. As a result, the casting can no longer be fed in a controlled manner during the casting process. Attempts have been made to counter this problem by using particularly stable and thick-walled feeder inserts. However, these are quite expensive due to the increased material requirements.
  • Spring mandrels generally comprise a tubular element for attachment to the model plate, a spring arranged in the tubular element and a mandrel tip element resting on the spring and telescopically displaceable in the longitudinal direction.
  • a feeder insert is placed, the lower surface of which is located in the starting arrangement, ie before the molding material is filled in, at a certain distance from the model surface.
  • DE 195 03 456 Cl describes an arrangement of a pot-shaped feeder and a mandrel.
  • the mandrel is attached to a cast model.
  • the feeder is mounted on the mandrel in such a way that a distance is maintained between its lower end and the surface of the casting model.
  • a first and a second rigidly specified stop for a first and a second spacing position are specified on the mandrel.
  • the spring mandrels must first be attached to the model plate before inserting the feeder inserts, which is complex. Furthermore, it is difficult to achieve a precisely arranged tapping edge with a spring mandrel. This cutting edge is provided in order to separate the residual feeder, i.e. of the metal remaining in the feeder insert after casting, from the casting. The cleaning effort is therefore usually quite high. Spring mandrels are also quite expensive and prone to wear.
  • the invention was therefore based on the object of providing a feeder insert which can withstand the forces which occur when the molding material is compressed. Furthermore, it should be possible, at least in a preferred embodiment of the feeder insert, to provide a tapping edge which enables the precise separation of the residual feeder from the casting.
  • the feeder insert according to the invention comprises a feeder body in which a feeder cavity is arranged.
  • the feeder body can have any shape in itself and can be shaped in the usual way.
  • the feeder body usually has an approximately tubular shape.
  • the feeder has a height that is greater than its diameter.
  • the feeder body can be cylindrical, for example. However, it is also possible for the feeder body to taper, for example towards the underside, so that a small contact area of the feeder insert on the model plate is achieved.
  • the feeder body has an opening on its underside through which the feeder cavity communicates with the mold cavity.
  • the feeder body can also be open on its upper side. However, it can also be closed at the top.
  • the feeder body consists of the materials customary for the production of feeders and can be designed to be insulating and / or exothermic.
  • an energy absorption device is provided on the top of the feeder body.
  • the feeder insert is attached directly to the surface of the model plate, so that in a preferred embodiment a breaking edge can be produced at the lower end of the feeder insert.
  • An energy absorption device is provided on the top of the feeder insert, which absorbs the forces or energy acting on the feeder insert during the compression of the molding material. This prevents the feeder body from being compressed and broken by the forces acting during compression.
  • the feeder therefore does not require a spring mandrel to absorb the forces acting on the compression of the molding material. However, it can make sense to provide a fixed mandrel for positioning and fixing the feeder insert according to the invention.
  • the energy absorption device preferably covers at least the top of the feeder body. In this way, forces which act parallel to the longitudinal axis of the feeder body in the direction of the model building board can essentially be absorbed or at least substantially reduced. Since the energy absorption device covers the entire top of the feeder body, parts of the feeder body can also be prevented from shearing when the molding material is compressed.
  • the energy absorption device can be designed in a variety of ways.
  • the energy absorption device can comprise a deformation element.
  • the irreversible deformation of the deformation element absorbs the force which acts on the upper side of the feeder body during the compression of the molding material and the energy introduced is destroyed, so that no damage to the feeder body occurs.
  • the deformation element can be designed in a variety of ways.
  • the deformation element can be, for example, a plate which is made of a suitable deformable material, for example a solid foam.
  • a solid foam can be a polymer foam, such as a polystyrene foam, or a foam made of an inorganic material, for example a foamed glass.
  • the deformation element can also consist of metal and have a shape that makes it possible to absorb energy by deforming the deformation element.
  • the deformation element can be designed like a box, the side walls being folded like an accordion. The can is used when the molding material is pressed compressed by further pressing the accordion structure together.
  • Other structures are also possible.
  • the deformation element has a honeycomb structure that is compressed under the influence of the forces acting during the press molding.
  • the energy absorption device is designed as an elastic element.
  • the energy absorption device can comprise, for example, a spring element which is compressed when the molding material is pressed in order to absorb the forces acting on the feeder body.
  • other elastic elements can also be used.
  • the energy absorption device can also comprise a friction element.
  • the energy introduced into the energy absorption device during compression molding is then converted into heat and destroyed by the friction between two appropriately designed surfaces.
  • the energy absorption device can be designed in a variety of ways.
  • it includes a plate-shaped element which is arranged essentially perpendicular to the longitudinal axis of the feeder and which has an extent which corresponds at least to the cross section of the upper side of the feeder body.
  • the energy absorption device is, for example, a plate, for example a plate which is deformable in the direction of the longitudinal axis of the feeder and which is placed on the top of the feeder body.
  • the plate-shaped element can also be designed in such a way that it has the shape of a cap.
  • the plate-shaped element comprises an apron running along its edge, which is preferably in the case that the plate-shaped element rests on the top of the feeder body, which overlaps the peripheral edge on the circumference of the top of the feeder body in the direction of the side surface of the feeder body. This makes it easier to fix the energy absorption device on the top of the feeder body.
  • the top and bottom of the plate-shaped element can be designed as essentially parallel surfaces.
  • the plate-shaped element can, for example, also have a greater thickness in the center of its surface than at the edge, so that the energy absorption device is given a roof-like shape.
  • the plate-shaped element has at least one extension and the feeder body on the upper side has at least one receptacle in which the extension is received.
  • the extension can for example be designed as a circumferential ring on the underside of the plate-shaped element, which is inserted into a circular circumferential groove formed on the top of the feeder body.
  • the extension is preferably designed as a rod-shaped dowel element and the receptacle as a sleeve.
  • At least two rod-shaped dowel elements are preferably provided on the side of the plate-shaped element facing the feeder body, but particularly preferably three or four or more dowel elements are provided.
  • the length of the dowel elements can be chosen to be very short if the dowels only serve to fix the position of the energy absorption device.
  • the rod-shaped dowel elements are preferably used in cooperation with the sleeves introduced in the feeder body to absorb and destroy the energy which is introduced into the feeder body during compression molding.
  • the sleeves can be used as a separate component For example, made of plastic or metal, be introduced into the feeder body.
  • rod-shaped dowel elements can be used in cooperation with the sleeves to absorb and destroy energy, which would otherwise cause the feeder body to compress, which can lead to the feeder body breaking.
  • projections are arranged along the wall of the sleeve, by means of which the diameter of the sleeve is reduced to such an extent that it becomes slightly smaller than the diameter of the rod-shaped dowel element.
  • the projections can be designed, for example, as webs which run in the direction of the longitudinal axis of the feeder body along the wall of the sleeve. If the rod-shaped dowel elements of the plate-shaped element are inserted into the sleeve, the plate-shaped element is first held at a certain distance from the top of the feeder body. If molding material is now filled in around the feeder insert and then compressed, the plate-shaped element is moved in the direction of the longitudinal axis of the feeder body toward the top of the feeder body.
  • the rod-shaped dowel elements deform the projections arranged along the wall of the sleeve, so that energy is absorbed on the one hand by the deformation and on the other hand by the friction between the sleeve and the rod-shaped dowel element, which would otherwise lead to compression of the feeder body.
  • a spring element can also be provided in the sleeve, which one when the rod-shaped dowel element penetrates the sleeve. Opposing force generated. The compression of the spring element in turn absorbs energy which could otherwise cause the feeder body to be compressed.
  • the spring element can also be designed in such a way that it presses against the side surfaces of the rod-shaped dowel element and thereby causes high friction between the spring element and the rod-shaped dowel element.
  • the energy absorption device has an apron which surrounds the circumference of the feeder body and which has an extent in the direction perpendicular to the underside of the plate-shaped element which corresponds at least to the length of the rod-shaped dowel elements.
  • a constriction is provided on or near the underside of the feeder body to form a breaking edge. Since the feeder insert according to the invention can be placed directly on the model plate, the position of the constriction is defined relative to the surface of the casting, so that a breaking edge for knocking off the remaining feeder can be arranged at a certain position. After the residual feeder has been knocked off, the effort for cleaning the surface of the casting is considerably reduced.
  • FIG. 1 shows a cross section through a feeder insert according to the invention before compression
  • Figure 2 shows a cross section through the feeder insert shown in Figure 1 after compression
  • FIG. 3 shows a longitudinal section through a further embodiment of the feeder insert according to the invention before compression
  • FIG. 4 a longitudinal and a cross section through a sleeve introduced into the top of the feeder body
  • FIG 5 shows a longitudinal section through a second embodiment of a sleeve introduced into the top of the feeder body.
  • FIG. 1 shows a longitudinal section through a first embodiment of the umbrella or dowel feeder according to the invention along a longitudinal axis 13 of the feeder.
  • the feeder insert comprises a feeder body 1 which encloses a feeder cavity 2.
  • An insert 3 is provided on the underside of the feeder body, through which a constriction can be formed to form a breaking edge.
  • the insert 3 consists, for example, of sheet steel, wood or a similar material.
  • the feeder cavity 2 ends in an outlet opening 4, via which the feeder cavity 2 is connected to the mold cavity.
  • the space of the casting mold cavity is taken up by a model plate 5.
  • a mandrel 6 is guided through the outlet opening 4, which is fixed on the model plate 5 and through which the feeder body 1 is fixed in its position.
  • two depressions 8 are made in the form of a sleeve in the feeder body 1.
  • the sleeve can be made of metal, wood, plastic or similar materials and can be inserted into corresponding recesses in the feeder body 1.
  • the sleeve can also be molded directly into the material of the feeder body.
  • Rod-shaped dowels 9, which carry a plate-shaped element 10 are inserted into the depressions 8.
  • the diameter of the dowels corresponds approximately to the diameter of the recesses 8.
  • the depressions 8 are provided with devices which prevent the rod-shaped dowels 9 from penetrating completely into the depressions 8. As a result, the plate-shaped element 10 is held at a certain distance from the upper side 7 of the feeder body 1.
  • an apron 11 is provided which is chosen so large that no molding material can penetrate into the space between the plate-shaped element 10 and the upper side 7 of the feeder body 1 when molding material is poured in.
  • the plate-shaped element 10 thereby contains an umbrella-like or knob-like shape.
  • the plate-shaped element 10 and the apron 11 consist, for example, of sheet steel, wood, plastic or similar materials.
  • rod-shaped dowel 9 and sleeve 8 destroy energy, for example due to friction or deformation, and thus prevent the feeder body 1 from being compressed.
  • the plate-shaped element 10 lies on the upper side 7 of the feeder body 1 after compression.
  • the feeder insert is surrounded on all sides by compressed molding material 12.
  • the mandrel 6 and the model plate 5 are removed so that the casting mold is obtained.
  • a constriction 14 is arranged, which after casting serves as a breaking edge for knocking off a feeder residue.
  • FIG. 3 shows a further embodiment of the feeder insert according to the invention in longitudinal section.
  • the feeder body 1 in addition to the Outlet opening 4 arranged on the underside has an opening 15 in the upper side of the feeder body 1.
  • the embodiment shown in Figure 3 is thus designed as an open screen or dowel feeder.
  • the rod-shaped dowels 9 of the plate-shaped element 10 are inserted into these.
  • molding material is poured in around the feeder insert and this is then compressed.
  • the plate-shaped element 10 is moved in the direction of the longitudinal axis 13 of the feeder toward the top 7 of the feeder body 1.
  • FIG. 4 shows a preferred embodiment of the depressions 8.
  • a depression 8 is introduced into the feeder body 1.
  • FIG. 4b shows a longitudinal section through the depression 8 along a longitudinal axis 16.
  • webs 17 are arranged, through which the cross section of the depression 8 is narrowed.
  • the webs 17 run parallel to the longitudinal axis 16, the thickness of the webs, ie their extension into the interior of the depression 8, increasing with increasing distance from the surface 7.
  • FIG. 4a shows a cross section along line aa shown in FIG. 4b. It can be seen that a plurality of webs 17 are arranged on the outer wall of the depression 8, as a result of which the cross section of the depression 8 is narrowed.
  • a rod-shaped dowel 9 (not shown) is now inserted into the recess 8, it can initially only be inserted into the recess 8 to a certain depth. In the further A frictional force is inserted between the webs 17 and the wall of the rod-shaped dowels 9. The webs 17 can also be deformed. In this process, energy is consumed so that the force exerted on the plate-shaped element by the compression of the molding material can be absorbed and the energy introduced can be destroyed.
  • the embodiment of the recess 8 shown in FIG. 4 can be obtained by molding the corresponding structure directly into the material of the feeder body 1. However, it is also possible to produce a corresponding sleeve, which is then inserted into a corresponding recess in the feeder body 1.
  • FIG. 5 shows a further embodiment of the recess 8 as a longitudinal section.
  • a sleeve 18 is inserted, the wall of which runs along the wall of the recess 8.
  • the sleeve 18 can also have a collar 19 which rests on the top 7 of the feeder body 1.
  • Spring elements are arranged in the sleeve 18. These can be constructed from spring steel or plastic, for example.
  • the spring elements 20 are movable at one end in the direction of the wall of the sleeve 18, which is represented by the arrow 21. If a rod-shaped dowel element 9 (not shown) is now inserted into the interior of the sleeve 18, this first comes into contact with the spring elements 20.
  • the spring elements 20 are pivoted at their lower end in the direction of the wall of the sleeve 18. They counter the movement of the rod-shaped dowel element with a counterforce, as a result of which the force exerted on the plate-shaped element 10 (not shown) is absorbed and the energy introduced is destroyed.
  • the sleeve 18 can be made of any suitable material. Suitable materials are e.g. Steel or plastic.

Abstract

L'invention concerne un insert d'alimentateur destiné à être inséré dans un moule de coulage employé pour le coulage de métaux, comportant un corps d'alimentateur (1) s'étendant le long d'un axe longitudinal d'alimentateur (13), présentant une cavité d'alimentateur (2), pourvu d'un côté inférieur pouvant être inséré dans le moule de coulage et d'un côté supérieur (7) faisant face au côté inférieur. Selon l'invention, le côté supérieur (7) du corps d'alimentateur (1) comporte un dispositif d'absorption d'énergie (8, 9).
EP05728689A 2004-04-02 2005-04-01 Alimentateur a ecran ou a chevilles Withdrawn EP1729904A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004017062A DE102004017062A1 (de) 2004-04-02 2004-04-02 Schirm- oder Dübelspeiser
PCT/EP2005/003429 WO2005095021A2 (fr) 2004-04-02 2005-04-01 Alimentateur a ecran ou a chevilles

Publications (1)

Publication Number Publication Date
EP1729904A2 true EP1729904A2 (fr) 2006-12-13

Family

ID=35034151

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05728689A Withdrawn EP1729904A2 (fr) 2004-04-02 2005-04-01 Alimentateur a ecran ou a chevilles

Country Status (4)

Country Link
US (1) US20080265129A1 (fr)
EP (1) EP1729904A2 (fr)
DE (1) DE102004017062A1 (fr)
WO (1) WO2005095021A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202007005575U1 (de) 2007-04-18 2007-06-14 GTP Schäfer Gießtechnische Produkte GmbH Speisereinsatz mit metallisch ummanteltem Bodenbereich
GB201415516D0 (en) 2014-09-02 2014-10-15 Foseco Int Feeder system
ES2781584T3 (es) 2015-09-02 2020-09-03 Foseco Int Sistema de alimentación
JP6669858B2 (ja) 2015-09-02 2020-03-18 フォセコ インターナショナル リミテッドＦｏｓｅｃｏ Ｉｎｔｅｒｎａｔｉｏｎａｌ Ｌｉｍｉｔｅｄ 押湯システム
TR201510862B (tr) 2015-09-02 2018-08-27 Foseco Int Besleme elemani
USD872781S1 (en) 2018-04-13 2020-01-14 Foseco International Limited Breaker core

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Publication number Priority date Publication date Assignee Title
GB8624598D0 (en) * 1986-10-14 1986-11-19 Foseco Int Feeder sleeves
DE3931595C1 (en) * 1989-09-22 1990-10-11 Gebrueder Luengen Gmbh & Co Kg, 5413 Bendorf, De Pattern for mfg. consumable mould - has recess at position for attaching feeder with restricting core between feed and pattern
DE4119192A1 (de) * 1991-06-11 1992-12-17 Hoesch Ag Federnder dorn zum halten von speisern
DE19503456C1 (de) * 1995-02-03 1995-11-02 Daimler Benz Ag Anordnung aus einem topfförmigen Speiser und einem diesen mit Abstand auf einem Gießmodell lagernden Dorn
DE29510068U1 (de) * 1995-06-28 1996-10-31 Chemex Gmbh Speiser zur Verwendung beim Gießen von geschmolzenem Metall
DE29513017U1 (de) * 1995-08-12 1995-12-07 Gtp Schaefer Giestechnische Pr Druckgeschützter Speisereinsatz
JPH09239489A (ja) * 1996-03-06 1997-09-16 Foseco Japan Ltd:Kk 鋳型造型用模型及び鋳型
DE29817471U1 (de) * 1998-09-30 2000-05-11 Gtp Schaefer Giestechnische Pr Speisereinsatz mit Verzögerungseinlage
US6279867B1 (en) * 1999-02-16 2001-08-28 Magneco/Metal, Inc. Multi-part form of a mold for forming a containment member for molten metal
DE10039519B4 (de) * 2000-08-08 2007-05-31 Chemex Gmbh Speisereinsatz
DE20115140U1 (de) * 2000-11-30 2002-01-31 Luengen Gmbh & Co Kg As Speiser mit einem rohrähnlichen Körper
DE20112425U1 (de) * 2001-07-27 2001-10-18 Gtp Schaefer Giestechnische Pr Speisereinsatz mit metallischem Speiserfuß
DE10156571C1 (de) * 2001-11-20 2003-01-16 Gtp Schaefer Giestechnische Pr Speisereinsatz mit Schutzkappe

Non-Patent Citations (1)

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Title
See references of WO2005095021A3 *

Also Published As

Publication number Publication date
WO2005095021A2 (fr) 2005-10-13
DE102004017062A1 (de) 2005-10-20
US20080265129A1 (en) 2008-10-30
WO2005095021A3 (fr) 2007-08-02

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