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EP0722373B1 - Dispositif de remplissage de tetes de soufflage - Google Patents

Dispositif de remplissage de tetes de soufflage Download PDF

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Publication number
EP0722373B1
EP0722373B1 EP94928751A EP94928751A EP0722373B1 EP 0722373 B1 EP0722373 B1 EP 0722373B1 EP 94928751 A EP94928751 A EP 94928751A EP 94928751 A EP94928751 A EP 94928751A EP 0722373 B1 EP0722373 B1 EP 0722373B1
Authority
EP
European Patent Office
Prior art keywords
filling
machine frame
filling assembly
weighing device
filling device
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
EP94928751A
Other languages
German (de)
English (en)
Other versions
EP0722373A1 (fr
Inventor
Werner Landua
Werner Pichler
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 EP0722373A1 publication Critical patent/EP0722373A1/fr
Application granted granted Critical
Publication of EP0722373B1 publication Critical patent/EP0722373B1/fr
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
    • B22C19/00—Components or accessories for moulding machines
    • B22C19/04—Controlling devices specially designed for moulding machines
    • 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 device for filling shot heads with molding materials, comprising a storage container for molding material, an outlet member for discharging the molding material into the shot head and a closure device for closing the outlet device comprising filling device, the filling device for immersing the outlet member in the shot head to be filled is vertically movably supported on a machine frame.
  • Core shooters have been known in foundry technology for many years.
  • the foundry cores or molds are usually manufactured in separate parts, brought together and connected to one another to form a casting mold.
  • An essential part of the core shooters are the so-called shot heads with the shot plates carrying the shot nozzles.
  • Molding sand, especially core sand, i.e. quartz sand which has already been mixed or coated with binding agent is poured into the shot heads in question and from there it is blown or shot into the respective molds with very high air pressure through the nozzles arranged in the shot plate.
  • the filling state of the known device in particular in the area of the storage container, is namely determined by means of measuring probes protruding from the outside into the storage container or ending flush with the inner wall of the storage container, these measuring probes being provided at different heights for determining defined filling levels.
  • these level probes have at least small steps or discontinuous transitions in the wall on the measurement side, ie towards the interior of the storage container, and thus form critical areas to which the non-free-flowing or moist molding material can get stuck or adhere.
  • a device for filling shot heads with molding materials is also known from US Pat. No. 5,078,201, but this device has a construction which differs from the generic device. No vertically movable filling device is provided there, so that there is also no outlet element for immersion in the shooting head to be filled. On the contrary, the device is moved from a position filling the device to a position above the firing head that empties the device.
  • a weighing device disclosed there acts exclusively in the position filling the device, namely in that the filling device or a storage container of the device can be placed on corresponding weighing cells. In any case, there can be no question of an operative connection between the filling device and a machine frame according to the teaching claimed. Consequently, it is not possible with a device according to US-A-5 078 201 to monitor the fill level of the filling device at any time in any working position.
  • GB-A-2 199 777 a device for filling shot heads which, however, in contrast to the generic device, cannot be immersed in the shot head to be filled. Rather, there is a storage container pivotable on one side, but arranged stationary. On the opposite side, i.e. on the freely pivotable side, the storage container is supported with a corresponding arm on a weighing device, so that the weight of the storage container with the sand therein can be at least approximately determined.
  • the device known from GB-A-2 199 777 is not suitable for being lowered into a shot head with an outlet member. The weighing device provided there, on which the storage container rests, makes such lowering impossible.
  • the weighing device provided there is not suitable for determining the entire device for filling shot heads with regard to their filling state. For example, the sand residues sitting in the downstream areas due to clumping cannot be detected, since only the storage container and not the entire facility is monitored here.
  • the present invention is based on the object of designing and developing a device for filling shooting heads of the type mentioned in such a way that the filling state of the entire device can be achieved at any time using simple means can be determined or a filling of the filling device can be precisely specified at any time and can also be reproduced at any time.
  • the inventive device for filling shot heads solves the above object by the features of claim 1. Thereafter, the device according to the invention is designed such that between the filling device and the machine frame a weighing device operatively connected on the one hand with the filling device and on the other hand with the machine frame for determining the weight of the Filling device is arranged.
  • the method of determining the fill level by means of measuring probes has been abandoned in the manner according to the invention. Rather, it has been recognized that the filling state of the filling device or the storage container can be determined without impairing the storage container by the fact that the weight of the entire filling device is determined. In the simplest embodiment of the device according to the invention, one could determine the net weight of the filling device before the first filling began and, after a corresponding weight determination with the filling device filled, would have to subtract the previously determined net weight from the gross weight. If the bulk density of the molding materials is known, the bulk volume can then be calculated, if necessary, the amount of molding material required for core shooting also being readily definable by weight.
  • the articulation of the weighing device it must be ensured that it is on the one hand operatively connected to the filling device or a holding part of the filling device and on the other hand to the machine frame or a corresponding holding part of the machine frame and there the mass of the filling device acts on the weighing device unimpeded or without external influences.
  • the weighing device is adjusted or zeroed to the net weight of the entire filling device, so that the weight of the molding material located in the filling device can be determined - directly - by means of the weighing device.
  • the zeroing to be carried out with respect to the filling device would have the great advantage that a corresponding display device only shows the weight corresponding to the filled molding material, with a direct correlation to the filling condition - on the basis of the bulk density of the molding material and of the volume-dependent volume - could also be displayed directly after processing by a processor.
  • a filling of the filling device could be controlled via the data obtained in this way, whereby the amount of molding material required for filling a shot head and the number of shot heads to be filled with the contents of the filling device - with one filling - must also be taken into account here.
  • the weighing device could be articulated on the filling device and act between the filling device and the machine frame. Additional guides or further articulations between the filling device and the machine frame are advantageous for reasons of stability, it only being necessary to ensure that the weight of the filling device actually acts on the weighing device.
  • the weighing device could also be articulated on the machine frame and also act between the machine frame and the filling device.
  • the weighing device is assigned to a lifting device which is articulated on the machine frame or on the filling device and acts between the machine frame and the filling device.
  • This lifting device brings about the vertical mobility of the filling device for immersing the outlet member in the shooting head.
  • the lifting device could comprise a cylinder-piston arrangement serving as a drive, wherein a weighing cell serving as a transmitter of the weighing device could in turn be an integral part of the cylinder-piston arrangement.
  • the force absorption could take place via load cells, on which the mass of the filling device acts directly or indirectly, for example also via a hydraulic pressure medium.
  • the single figure shows a schematic representation of a device for filling shot heads 1 with molding materials 2, with a storage container 3 for molding material 2, an outlet member 4 for discharging the molding material 2 into the shooting head 1 and a closure device 5 for closing the outlet member 4 comprising filling direction 6, wherein the filling device 6 for immersing the outlet member 4 in the shooting head 1 to be filled is held vertically movable on a machine frame 7.
  • a weighing device 8 for determining the weight of the entire filling device 6 is arranged between the filling device 6 and the machine frame 7. It is important here that the weighing device 8 is set or zeroed to the net weight of the filling device 6, so that the weight of the molding material 2 located in the filling device 6 can be determined by means of the weighing device 8 shown only schematically here.
  • the single figure further shows that the weighing device 8 is articulated on the one hand on the filling device 6 or on a holder 9 provided there and on the other hand on a lifting device 10 acting between the machine frame 7 and the filling device 6 and thus between the filling device 6 and the machine frame 7 acts.
  • the weighing device 8 it is also possible to integrate the weighing device 8 into the lifting device 10, it being possible for the weight determination to be determined on the basis of a pressure which increases in a cylinder-piston arrangement, on the basis of the mass of the filling device 6.
  • the teaching claimed here relates in principle to the determination of the filling state of a device for filling shot heads, namely on the basis of a weight determination of the filling device. Any other refinements of the teaching are conceivable without being restricted to the exemplary embodiment just mentioned above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Casting Devices For Molds (AREA)
  • Weight Measurement For Supplying Or Discharging Of Specified Amounts Of Material (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)

Abstract

Un dispositif de remplissage de têtes de soufflage (1) avec des matières à mouler (2) comprend un réservoir (3) de matières à mouler (2), un organe (4) de décharge des matières à mouler (2) dans la tête de soufflage (1) et un organe de remplissage (6) qui comprend un organe de fermeture (5) de l'organe de décharge (4). L'organe de remplissage (6) est monté mobile en hauteur sur un bâti (7) de la machine, ce qui permet d'introduire l'organe de décharge (4) dans la tête de soufflage (1) à remplir. Afin d'assurer un remplissage prédéterminable et reproductible avec précision de l'organe de remplissage (6) avec des matières à mouler et d'autre part une détermination précise du niveau de remplissage de l'organe de remplissage (6), un dispositif de pesage (8) qui sert à déterminer le poids de l'organe de remplissage (6) est monté entre l'organe de remplissage (6) et le bâti (7) de la machine.

Claims (6)

  1. Dispositif de remplissage de matériaux de moulage dans des têtes de soufflage ou de tirage (1), avec une installation de remplissage (6) comprenant un réservoir (3) pour le matériau de moulage (2), un organe d'évacuation (4) pour évacuer le matériau de moulage (2) vers la tête de soufflage ou de tirage (1) et un dispositif d'obturation (5) pour l'obturation de l'organe d'évacuation (4), où l'installation de remplissage (6) est montée à mobilité verticale sur un bâti de machine (7) aux fins de l'immersion de l'organe d'évacuation (4) dans la tête de tirage (1) à remplir,
    caractérisé en ce qu'entre l'installation de remplissage (6) et le bâti de machine (1) est disposé un appareil de pesage (8) en connexion active d'une part avec l'installation de remplissage et d'autre part avec le bâti de machine, aux fins de la détermination du poids de l'installation de remplissage (6).
  2. Dispositif suivant la revendication 1, caractérisé en ce que l'appareil de pesage (8) est taré sur le poids net de l'installation de remplissage, de telle sorte que l'appareil de pesage (8) permet de déterminer le poids du matériau de moulage (2) se trouvant dans l'installation de remplissage (6).
  3. Dispositif suivant la revendication 1 ou 2, caractérisé en ce que l'appareil de pesage (8) est articulé sur l'installation de remplissage (6) et agit entre l'installation de remplissage (6) et le bâti de machine (7).
  4. Dispositif suivant la revendication 1 ou 2, caractérisé en ce que l'appareil de pesage (8) est articulé sur le bâti de machine (7) et agit entre le bâti de machine (7) et l'installation de remplissage (6).
  5. Dispositif suivant l'une quelconque des revendications de 1 à 4, caractérisé en ce que l'appareil de pesage (8) est associé à un dispositif de levage (10) articulé sur le bâti de machine (7) ou sur l'installation de remplissage (6) et agissant entre le bâti de machine (7) et l'installation de remplissage (6).
  6. Dispositif suivant la revendication 6, caractérisé en ce que le dispositif de levage (10) comprend un ensemble cylindre et piston servant de commande et en ce qu'une cellule de pesage servant de capteur de l'appareil de pesage (8) fait partie intégrante de l'ensemble cylindre et piston.
EP94928751A 1993-10-07 1994-10-06 Dispositif de remplissage de tetes de soufflage Expired - Lifetime EP0722373B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4334118 1993-10-07
DE4334118A DE4334118C2 (de) 1993-10-07 1993-10-07 Vorrichtung zum Füllen von Schußköpfen
PCT/DE1994/001169 WO1995010375A2 (fr) 1993-10-07 1994-10-06 Dispositif de remplissage de tetes de soufflage

Publications (2)

Publication Number Publication Date
EP0722373A1 EP0722373A1 (fr) 1996-07-24
EP0722373B1 true EP0722373B1 (fr) 1997-06-11

Family

ID=6499567

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94928751A Expired - Lifetime EP0722373B1 (fr) 1993-10-07 1994-10-06 Dispositif de remplissage de tetes de soufflage

Country Status (7)

Country Link
US (1) US5671798A (fr)
EP (1) EP0722373B1 (fr)
JP (1) JP2977093B2 (fr)
CA (1) CA2173491A1 (fr)
DE (2) DE4334118C2 (fr)
ES (1) ES2104422T3 (fr)
WO (1) WO1995010375A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101362191B (zh) * 2008-09-11 2010-06-09 冯新林 射芯机多功能下压气包
CN101352752B (zh) * 2008-09-11 2010-06-02 冯新林 冷芯盒射芯机

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1025108B (de) * 1956-05-03 1958-02-27 Badische Maschinenfabrik Ag Se Vorrichtung zum gewichtsmaessigen Abmessen und Zuteilen einer vorbestimmten Formsandmenge fuer Formkasten
DE2304564A1 (de) * 1973-01-31 1974-08-08 Cobomat Apparatebau Gmbh Vorrichtung zur automatischen herstellung von formen und kernen fuer giessereizwecke
JPS55126344A (en) * 1979-03-19 1980-09-30 Sintokogio Ltd Mold molding apparatus
SU1507509A1 (ru) * 1985-08-15 1989-09-15 Всесоюзный научно-исследовательский институт литейного машиностроения, литейной технологии и автоматизации литейного производства Способ определени параметров отработанной формовочной смеси
CH671895A5 (fr) * 1986-12-22 1989-10-13 Foundry Design Corp Europ
JP2627805B2 (ja) * 1989-07-10 1997-07-09 新東工業株式会社 鋳物砂の鋳枠への投入装置
US5078201A (en) * 1989-11-27 1992-01-07 Osaka Shell Industry Co., Ltd. Casting core fabricating apparatus
JP2912722B2 (ja) * 1991-02-21 1999-06-28 日産自動車株式会社 造型機用型砂供給量制御装置
DE4128952C1 (fr) * 1991-08-30 1992-07-09 Adolf Hottinger Maschinenbau Gmbh, 6800 Mannheim, De

Also Published As

Publication number Publication date
DE4334118C2 (de) 1997-01-30
JP2977093B2 (ja) 1999-11-10
WO1995010375A2 (fr) 1995-04-20
JPH08510964A (ja) 1996-11-19
US5671798A (en) 1997-09-30
CA2173491A1 (fr) 1995-04-20
WO1995010375A3 (fr) 1995-08-03
EP0722373A1 (fr) 1996-07-24
ES2104422T3 (es) 1997-10-01
DE59403134D1 (de) 1997-07-17
DE4334118A1 (de) 1995-04-13

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