EP0712339A1 - Tete de soufflage pour machine a tirer les noyaux - Google Patents

Tete de soufflage pour machine a tirer les noyaux

Info

Publication number
EP0712339A1
EP0712339A1 EP94920884A EP94920884A EP0712339A1 EP 0712339 A1 EP0712339 A1 EP 0712339A1 EP 94920884 A EP94920884 A EP 94920884A EP 94920884 A EP94920884 A EP 94920884A EP 0712339 A1 EP0712339 A1 EP 0712339A1
Authority
EP
European Patent Office
Prior art keywords
shot
head
shooting
core
core sand
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.)
Granted
Application number
EP94920884A
Other languages
German (de)
English (en)
Other versions
EP0712339B1 (fr
Inventor
Werner Landua
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.)
Adolf Hottinger Maschinenbau GmbH
Original Assignee
Adolf Hottinger Maschinenbau 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.)
Filing date
Publication date
Application filed by Adolf Hottinger Maschinenbau GmbH filed Critical Adolf Hottinger Maschinenbau GmbH
Publication of EP0712339A1 publication Critical patent/EP0712339A1/fr
Application granted granted Critical
Publication of EP0712339B1 publication Critical patent/EP0712339B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
    • B22C15/23—Compacting by gas pressure or vacuum
    • B22C15/24—Compacting by gas pressure or vacuum involving blowing devices in which the mould material is supplied in the form of loose particles

Definitions

  • the invention relates to a firing head for a core shooting machine for firing foundry cores or molds, with an opening on the inlet side for the optional connection of a filling device which plunges into the firing head with an outlet member, or a clamping head serving for sealing compressed air and a shot plate arranged on the outlet side and having shot nozzles.
  • the known shot heads of the type in question are problematic in particular in the context of automatic core package production, since shot weight differences of between 60 kg and 1 kg occur, depending on the core to be shot, the shot heads generally absorbing a maximum of 70 kg of core sand can.
  • the outer dimensions of the shooting heads are predetermined, in particular in the case of automatic core package production, namely the shooting heads in the core shooting machine must be interchangeable regardless of the cores to be fired. Consequently, in the case of very small cores to be shot, there is a considerable supply of sand and binder in the interior of the shot head, the low shot weight causing only a low throughput of core sand and binder.
  • the present invention is therefore based on the object of specifying a shooting head for a core shooting machine for shooting foundry cores or molds, which is particularly suitable for shooting very small cores.
  • the shooting head according to the invention achieves the above object by the features of claim 1.
  • the shooting head in question is designed in such a way that within the shooting head an outlet member that is essentially immersed from the lower edge of the maximally immersed or from the outlet member ⁇ organ-defined level up to the shot nozzles extending core sand guide system is formed.
  • the core sand to be filled into the shot head, together with binding agent must first reach a minimum filling level, so that filling with the filling device known from DE 41 28 952 Cl, for example, and subsequent smoothing of the filler filled sand is even possible.
  • a core sand guide system is formed in the manner according to the invention within the shot head, which essentially extends from the lower edge of the maximum immersed outlet member of the filling device or from the fill level defined by the outlet port up to the firing plate or the firing nozzles extends.
  • the core sand guidance system already begins at the level of the sand surface of the filled-in core sand or just below it, so that both the core sand and the compressed air required for firing are at least largely channeled by the core sand guidance system. Furthermore, it is of particular importance here that the core sand guidance system takes up a very considerable volume, by which the volume of the core sand required for firing is reduced while the fill level remains the same. This already favors the shooting of particularly small cores considerably, the risk of aging of the binder on the one hand and unwanted pre-compression due to multiple pressurization of compressed air on the other hand being considerably reduced.
  • the core sand guiding system it is advantageous if it has channels that extend to the firing nozzles and form a positive guide for the core sand.
  • Each of these channels could lead to a shot nozzle, depending on the geometry of the core to be shot it is also possible to supply two or more adjacent shot nozzles via a channel with both core sand and compressed air.
  • the channels could taper towards the shot nozzles preferably in a funnel shape, which is particularly the case if the channels each lead to a shot nozzle.
  • the walls of the channels preferably converge in a wedge shape on the side facing away from the shot nozzles. This convergence ensures that the sand to be filled is separated and also splits the air flow directed in the direction of the shot nozzles into individual partial flows.
  • the core sand guide system and its walls have smooth sliding surfaces where the core sand and compressed air can flow unhindered.
  • the walls of the core sand guiding system could be coated with a special sliding layer.
  • the regions between the walls are made of solid material.
  • the volume available within the firing head for filling with core sand is reduced by the volume of this solid material, so that a core sand guidance system with a large volume is required for shooting very small cores and a core sand guidance system with a relatively small volume is required for shooting large cores.
  • the volume available in the area between the firing plate or firing nozzle and the filling level specified by the outlet member of the filling device for filling with core sand and binder is reduced considerably by the core sand guidance system, so that the throughput of core sand is reduced increased in this area and it is excluded that sand through multiple pressurization is pre-compressed within the shot head.
  • the shot head and the wall or areas between the channels of the core sand guide system and the channels themselves could be dimensioned such that the amount of core sand that can be brought in through the outlet element to the fill level is sufficient for firing only a single core.
  • This measure would ultimately ensure that multiple exposure to the core sand located within the shot head as a quasi-reservoir by the compressed air required for shooting is excluded. Rather, the core sand charged with compressed air is almost completely shot through the shot nozzles, a minimum reserve always having to be kept in the area in front of the individual shot nozzles, so that one of the shot nozzles with core sand is not undersupplied with uneven filling.
  • the core sand guiding system could be used to adapt to filling quantity differences or shot weight differences between 60 kg and 1 kg, with only the "inner life", i.e. with the outside dimensions of the shot head remaining the same.
  • the core sand guide system and the arrangement of the shot nozzles are to be modified.
  • FIG. 1 is a schematic plan view of an exemplary embodiment of an upwardly opened shooting head, Fig. 2 in a sectional side view, schematically, the object of Fig. 1 in section along the line II-II and
  • Fig. 3 in a sectional side view, schematically, the object of Fig. 1 in section along the line III-III.
  • the shot head has an inlet-side opening 1 for the optional connection of a filling device which dips into the shot head with a discharge element and which provides the filling level, or a tensioning head which serves for sealing compressed air, with a gap filter between the shot head and the tensioning head designated, for swirling the compressed air filter can be provided.
  • a shot nozzle 3 is provided with a shot plate 4.
  • a core sand guiding system 6 which extends essentially from the lower edge of the outlet member not shown in the figures, is immersed as far as possible, or from the fill level 5 defined by the outlet member to the shot nozzles 3, this core sand guiding system 6 for the volume of core sand available is considerably reduced.
  • This core sand guide system 6 has channels 7 which extend to the shot nozzles 3 and form a positive guide for the core sand, wherein these channels 7 can lead either to a single shot nozzle 3 or to several shot nozzles 3.
  • the channels 7 taper towards the shot nozzles 3 at least in one direction, so that an approximately funnel-shaped effect occurs.
  • the walls 8 of the channels 7 converge in a wedge shape, so that a division takes place on the one hand of the core sand to be filled in and on the other hand the compressed air required for firing takes place.
  • a reduction in the flow resistance is achieved in that the walls 8 have smooth sliding surfaces which can either be polished or are provided with a special sliding layer.
  • the areas between the walls 8 consist of solid material.
  • the shot head and the walls 8 or areas between the channels 7 and the channels 7 themselves are dimensioned in such a way that the outlet element, not shown in the figures, extends to
  • the fill level 5 of core sand that can be introduced is sufficient to shoot a core, a certain excess of sand always having to be provided, so that one of the shot nozzles 3 is not supplied with sand if the filling is uneven.
  • the core sand guiding system 6 provided in the shot head according to the invention is used to adapt to filling quantity differences or shot weight differences between approximately 60 kg and 1 kg, so that very large and heavy as well as small cores can be shot with the same outer dimensions of the shot head.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Coating Apparatus (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

L'invention concerne une tête de soufflage de machine à tirer les noyaux pour tirer des noyaux ou des moules de fonderie, qui comporte, côté entrée, une ouverture (1) permettant de raccorder soit un dispositif de remplissage dont un élément de sortie s'enfonce dans la tête de soufflage et prédéfinit le niveau de remplissage (5), soit une tête de serrage permettant d'appliquer de l'air comprimé en vue de l'étanchéité, et, côté sortie, un plateau de soufflage (4) pourvu d'ajutages de soufflage (3). En vue de la production automatique de paquets de noyaux, lorsqu'il y a des différences de poids extrêmes entre les noyaux individuels, cette tête de soufflage comporte, à l'intérieur, un système de guidage du sable de noyautage s'étendant sensiblement du bord inférieur de l'élément de sortie qui s'enfonce de manière maximale dans ladite tête de soufflage ou bien du niveau de remplissage (5) défini par l'élément de sortie, jusqu'aux ajutages de soufflage (3).
EP94920884A 1993-08-04 1994-07-16 Tete de soufflage pour machine a tirer les noyaux Expired - Lifetime EP0712339B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4326180 1993-08-04
DE4326180A DE4326180C2 (de) 1993-08-04 1993-08-04 Schußkopf für eine Kernschießmaschine
PCT/DE1994/000821 WO1995004620A1 (fr) 1993-08-04 1994-07-16 Tete de soufflage pour machine a tirer les noyaux

Publications (2)

Publication Number Publication Date
EP0712339A1 true EP0712339A1 (fr) 1996-05-22
EP0712339B1 EP0712339B1 (fr) 1997-05-07

Family

ID=6494449

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94920884A Expired - Lifetime EP0712339B1 (fr) 1993-08-04 1994-07-16 Tete de soufflage pour machine a tirer les noyaux

Country Status (7)

Country Link
US (1) US5597029A (fr)
EP (1) EP0712339B1 (fr)
JP (1) JPH09501106A (fr)
CA (1) CA2168669A1 (fr)
DE (2) DE4326180C2 (fr)
ES (1) ES2102237T3 (fr)
WO (1) WO1995004620A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3226151B2 (ja) * 1995-12-15 2001-11-05 新東工業株式会社 ブロースクイズ式鋳型造型機
ES1045359Y (es) * 2000-02-15 2001-02-16 Loramendi Sa Cabezal de soplado para maquinas sopladoras de machos
DE10144193C1 (de) * 2001-09-08 2002-10-31 Vaw Mandl & Berger Gmbh Linz Verfahren und Formschießmaschine zum Herstellen von Formteilen, wie Gießkernen, für Gießformen zum Vergießen von Metallschmelze
US7819168B2 (en) * 2006-07-27 2010-10-26 Hunter Automated Machinery Corporation Method and apparatus for transferring sand into flask of molding machine
US10835952B2 (en) * 2017-10-20 2020-11-17 Hunter Foundry Machinery Corporation Method and apparatus for forming sand molds via top and bottom pneumatic sand filling perpendicular to the pattern plate
CN109158550B (zh) * 2018-09-27 2024-05-28 福建丰力机械科技有限公司 射沙斗机构及其使用方法
DE102019116846A1 (de) 2019-06-21 2020-12-24 HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung Schussdüse mit Spülfunktion
DE102019116841A1 (de) * 2019-06-21 2020-12-24 HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung Schussdüse mit gewendelter Struktur zum Erzeugen von Drall

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1002919B (de) * 1953-02-12 1957-02-21 Albertuswerke G M B H Vorrichtung zum Auflockern des im kegelfoermig sich nach unten verjuengenden Sandbehaelter von Kernblasmaschinen befindlichen Sandes
US3863705A (en) * 1972-10-17 1975-02-04 Sherwin Williams Co Sand blow reservoir for a foundry molding machine
DE2304564A1 (de) * 1973-01-31 1974-08-08 Cobomat Apparatebau Gmbh Vorrichtung zur automatischen herstellung von formen und kernen fuer giessereizwecke
DE2522825B1 (de) * 1975-05-23 1976-11-25 Schubert & Salzer Maschinen Schiesskopf einer schiessmaschine fuer giessereizwecke zum fuellen von form- oder kernkaesten
US4135569A (en) * 1977-07-13 1979-01-23 Acme-Cleveland Corporation Molding machine clean out
DE2833999C2 (de) * 1978-08-03 1981-11-19 Eugen Dipl.-Ing. 8871 Burtenbach Bühler Verfahren und Vorrichtung zur Herstellung von Gießformen und -kernen
DE2923271A1 (de) * 1979-06-08 1980-12-11 Arenco Bmd Maschfab Giesserei-formmaschine
DE4128952C1 (fr) * 1991-08-30 1992-07-09 Adolf Hottinger Maschinenbau Gmbh, 6800 Mannheim, De
DE4208647C2 (de) * 1992-03-18 1995-06-29 Hottinger Adolf Masch Vorrichtung zum Schießen von Gießereikernen oder -formen mit Formstoffen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9504620A1 *

Also Published As

Publication number Publication date
DE59402674D1 (de) 1997-06-12
WO1995004620A1 (fr) 1995-02-16
CA2168669A1 (fr) 1995-02-16
DE4326180A1 (de) 1995-02-09
US5597029A (en) 1997-01-28
JPH09501106A (ja) 1997-02-04
DE4326180C2 (de) 1997-01-30
ES2102237T3 (es) 1997-07-16
EP0712339B1 (fr) 1997-05-07

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