EP0712339B1 - Schusskopf für eine kernschiessmaschine - Google Patents

Schusskopf für eine kernschiessmaschine Download PDF

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Publication number
EP0712339B1
EP0712339B1 EP94920884A EP94920884A EP0712339B1 EP 0712339 B1 EP0712339 B1 EP 0712339B1 EP 94920884 A EP94920884 A EP 94920884A EP 94920884 A EP94920884 A EP 94920884A EP 0712339 B1 EP0712339 B1 EP 0712339B1
Authority
EP
European Patent Office
Prior art keywords
blasting
head
shooting
core
nozzles
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.)
Expired - Lifetime
Application number
EP94920884A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0712339A1 (de
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/de
Application granted granted Critical
Publication of EP0712339B1 publication Critical patent/EP0712339B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 shot head for a core shooter for shooting foundry cores or molds, with an inlet-side opening for the optional connection of a filling device which dips into the shot head with an outlet member or a filling device which serves to seal the compressed air supply, and a weft nozzle arranged on the outlet side Firing plate.
  • the known shot heads of the type in question are problematic, however, since shot weight differences of between 60 kg and 1 kg occur depending on the core to be shot, the shot heads generally being able to take up to 70 kg of core sand.
  • 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 fired, there is a considerable supply of sand and binder in the interior of the firing head, the low firing weight causing only a low throughput of core sand and binder.
  • the compressed air required for shooting must penetrate through the entire sand supply within the shot head, so that a very considerable compression takes place within the shot head, which makes shooting the cores more difficult, if not impossible, in the event of clumping in the area in front of the nozzles.
  • 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 solves the above object by the features of claim 1. Thereafter, the shooting head in question is designed such that within the shooting head a substantially from the lower edge of the maximum immersed outlet member or from the level defined by the outlet member up to the core sand guiding system extending the shot nozzles is formed with channels extending to the shot nozzles and that the walls of the channels converge in a wedge shape on the side facing away from the shot nozzles.
  • the core sand to be filled in the shot head together with the binding agent, must first reach a minimum filling level so that filling with the filling device known from DE 41 28 952 C1, for example, and subsequent smoothing of the 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 member to the firing plate or extends the shot nozzles.
  • the core sand guidance system 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 through 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 small cores in particular, whereby the risk of aging of the binder on the one hand and unwanted pre-compression due to multiple pressurized air pressures on the other hand is considerably reduced.
  • the core sand guide system has channels extending to the firing nozzles. These channels form a compulsory channel for the core sand. Each of these channels could lead to a weft nozzle, depending on the geometry of the core to be fired, it is also possible to supply two or more adjacent weft nozzles via a channel with both core sand and compressed air.
  • the walls of the channels 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 channels could taper towards the shot nozzles, preferably in a funnel shape, which is particularly the case when the channels each lead to a shot nozzle.
  • the core sand guide system or its walls have smooth sliding surfaces on which the core sand and the compressed air can flow freely.
  • the walls of the core sand guiding system could be coated with a special sliding layer.
  • the areas 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 nozzles and the filling level for filling with core sand and binder, which is predetermined by the outlet element of the filling device, is reduced considerably by the core sand guidance system, so that the throughput of core sand in this area increases and it increases is excluded that sand through multiple pressurization is already 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 is not undersupplied with core sand if the filling is uneven.
  • 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 control system and the arrangement of the shot nozzles must be modified.
  • the figures together show a shooting head for a core shooting machine, not shown in the figures, for shooting foundry cores or molds.
  • the weft head has an inlet-side opening 1 for the optional connection of a filling device which dips into the weft head with an outlet element and which provides the filling level or a clamping head which serves for the pressurized application of compressed air can be provided.
  • a shot plate 4 having shot nozzles 3 is provided at the outlet end 2.
  • 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 significantly 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 firing 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 of the core sand to be filled in and the compressed air required for firing takes place on the one hand.
  • 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 such that the fill quantity that can be introduced through the outlet element (not shown in the figures) to the fill level 5 of core sand is sufficient to shoot a core, a certain excess of sand always having to be provided, ie one of the shot nozzles 3 is not undersupplied with sand when filling is uneven.
  • the core sand guide system 6 provided in the shot head according to the invention is used to adapt to filling quantity differences or shot weight differences between about 60 kg and 1 kg, so that very large and heavy as well as small cores can be shot with the same outside 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)
EP94920884A 1993-08-04 1994-07-16 Schusskopf für eine kernschiessmaschine Expired - Lifetime EP0712339B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4326180A DE4326180C2 (de) 1993-08-04 1993-08-04 Schußkopf für eine Kernschießmaschine
DE4326180 1993-08-04
PCT/DE1994/000821 WO1995004620A1 (de) 1993-08-04 1994-07-16 Schusskopf für eine kernschiessmaschine

Publications (2)

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

Family

ID=6494449

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94920884A Expired - Lifetime EP0712339B1 (de) 1993-08-04 1994-07-16 Schusskopf für eine kernschiessmaschine

Country Status (7)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019116841A1 (de) * 2019-06-21 2020-12-24 HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung Schussdüse mit gewendelter Struktur zum Erzeugen von Drall
WO2020254469A1 (de) 2019-06-21 2020-12-24 HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung Schussdüse mit spülfunktion

Families Citing this family (6)

* 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

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 (es) * 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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019116841A1 (de) * 2019-06-21 2020-12-24 HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung Schussdüse mit gewendelter Struktur zum Erzeugen von Drall
WO2020254469A1 (de) 2019-06-21 2020-12-24 HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung Schussdüse mit spülfunktion

Also Published As

Publication number Publication date
CA2168669A1 (en) 1995-02-16
US5597029A (en) 1997-01-28
ES2102237T3 (es) 1997-07-16
EP0712339A1 (de) 1996-05-22
JPH09501106A (ja) 1997-02-04
WO1995004620A1 (de) 1995-02-16
DE4326180A1 (de) 1995-02-09
DE59402674D1 (de) 1997-06-12
DE4326180C2 (de) 1997-01-30

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