EP0098405A1 - Method of producing large size green sand moulding parts (mould area 1-3 m2) for pouring into flaskless moulds - Google Patents

Method of producing large size green sand moulding parts (mould area 1-3 m2) for pouring into flaskless moulds Download PDF

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Publication number
EP0098405A1
EP0098405A1 EP83105691A EP83105691A EP0098405A1 EP 0098405 A1 EP0098405 A1 EP 0098405A1 EP 83105691 A EP83105691 A EP 83105691A EP 83105691 A EP83105691 A EP 83105691A EP 0098405 A1 EP0098405 A1 EP 0098405A1
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EP
European Patent Office
Prior art keywords
sand
box
model
producing large
pouring
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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
EP83105691A
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German (de)
French (fr)
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EP0098405B1 (en
Inventor
Oskar Schillinger
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Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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Publication of EP0098405A1 publication Critical patent/EP0098405A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C21/00—Flasks; Accessories therefor
    • B22C21/12—Accessories
    • B22C21/14—Accessories for reinforcing or securing moulding materials or cores, e.g. gaggers, chaplets, pins, bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C11/00—Moulding machines characterised by the relative arrangement of the parts of same
    • B22C11/10—Moulding machines characterised by the relative arrangement of the parts of same with one or more flasks forming part of the machine, from which only the sand moulds made by compacting are removed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
    • B22C15/02—Compacting by pressing devices only
    • B22C15/08—Compacting by pressing devices only involving pneumatic or hydraulic mechanisms

Definitions

  • the invention relates to a method and a device for producing wet cast molded parts in large format for boxless casting.
  • Boxless casting molds are generally known and have the advantage that there is no need for expensive mold boxes which require maintenance and are subject to constant wear.
  • the influence of heat leads to deformation, which affects the accuracy of the castings.
  • the object of the invention is to provide a method and a device in which the sand is introduced in such a way that air inclusions in the sand are not possible and the same is easily compacted.
  • the main advantage of the invention is that the elastic film corresponds to a press plate which is divided into an infinite number of press points, which the sand layer, which is approximately equally thick on all sides, is ideally able to compact.
  • the centrifugal head 7 in the feed line for wet cast sand 5 works in principle similar to a sand sling in 2 speed ranges. This makes it possible that, in the case of extremely unfavorable model parts, pre-compression can be achieved for a short time by switching to level II.
  • the wet cast sand 5 is applied to the model 1 in an equally thick layer and covered by an elastic film 10. This is first sucked in by vacuum 8 on the underside of the press head 11 and, after being placed on the molding box 4, is pressed onto the sand surface by means of compressed air 9 using a pulsator 12. Here, the press head 11 is locked by means of hydraulic cylinders 13. Then the press head 11 is briefly removed via rails 14 and the backfill 6 is applied.
  • Model 1, model plate 2 and plate carrier 3 form a unit that oscillates between stations B / 1 and D / 1.
  • air nozzles 4 ' are attached at different heights.
  • Air nozzles 2 ′ for lifting the box 4 are also arranged in the model plate 2, via which compressed air 17 is pressed between the model and the bale.
  • the roller conveyor 18 takes over the final lifting out of the model.
  • Fig. 2 shows the arrangement of the bar 15 with the sliding bolt 16, which automatically retracts when the bolt 16a is tightened and releases the box for removal.
  • 3 and 4 show the weight, which ensures an even load on the bale. A perfect seal of the parting line between the upper and lower box is given when each box pair is made together.
  • Fig. 5 shows a molding and casting plant as an example, which represents the favorable transport routes of the various parts of the device.
  • the top box runs through the same stations on the OT line.
  • the transport pallet is placed at E / 1 and runs via G / 1 - G / 2 -H / 1 ... - K / 2 - I / 1 - I / 2 ... K / 3 - L or M - Line to M / 1 and back to E / 1.
  • the weight is put on at K / 2 and runs over I / 1 into the casting line 1/2 ... After leaving the casting line, the weight is lifted off at K / 3 and transferred to K / 2.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)

Abstract

1. Process for producing large format green sand moulded parts by means of boxless moulding, whereby sand is filled in a mould and compressed by applying pressure via a film is that during a first filling stage I, the green moulding sand (5) is applied on a pattern (1) on all sides in one layer in a moulding box (4), which limits the sand surface on the pattern plate (2) and via a spinner (7) which rotates at reduced speed in order to protect the pattern, and is then covered with a flexible film and compressed and during a second filling stage II the back-up (6) is finally applied and the mould subject to final compression.

Description

Die Erfindung bezieht sich auf ein Verfahren und eine Einrichtung zur Herstellung von Naßguß-Formteilen im Großformat zum kastenlosen Gießen.The invention relates to a method and a device for producing wet cast molded parts in large format for boxless casting.

Kastenlose Gießformen sind allgemein bekannt und haben den Vorteil, daß teure Formkästen, die Wartung benötigen und einem steten Verschleiß unterworfen sind, entfallen. Bei großen Kästen kommt hinzu, daß der Wärmeeinfluß zu Verformungen führt, wodurch die Genauigkeit der Gußstücke leidet.Boxless casting molds are generally known and have the advantage that there is no need for expensive mold boxes which require maintenance and are subject to constant wear. In addition, with large boxes, the influence of heat leads to deformation, which affects the accuracy of the castings.

Bei allen bisher bekannten Verfahren der Verdichtung des Naßgußsandes ist eine allseitige Gleichmäßigkeit nicht gewährleistet. Insbesonders trifft dies bei stark unterschiedlichen Modellhöhen an den Vertikalwänden zu. Als Folge davon sind Gußfehler durch Treiben und Ungenauigkeiten der Konturen möglich.In all previously known methods of compacting the wet cast sand, uniformity on all sides is not guaranteed. This is especially true when the model walls have very different heights on the vertical walls. As a result, casting errors due to driving and inaccuracies in the contours are possible.

Aufgabe der Erfindung ist es, ein Verfahren und eine Einrichtung zu schaffen, bei der der Sand so eingebracht ist, daß Lufteinschlüsse im Sand nicht möglich sind und auf einfache Weise eine gleichmäßige Verdichtung desselben erreicht wird.The object of the invention is to provide a method and a device in which the sand is introduced in such a way that air inclusions in the sand are not possible and the same is easily compacted.

Die Aufgabe wird durch die erfinderischen Merkmale der Kennzeichen der Ansprüche 1 bis 3 gelöst.The object is achieved by the inventive features of the characteristics of claims 1 to 3.

Der wesentliche Vorteil der Erfindung ist, daß die elastische Folie einer Preßplatte entspricht, die in unendlich viele Preßpunkte aufgeteilt ist, die die allseitig etwa gleich starke Sandschicht in idealster Weise zu Verdichten imstande ist.The main advantage of the invention is that the elastic film corresponds to a press plate which is divided into an infinite number of press points, which the sand layer, which is approximately equally thick on all sides, is ideally able to compact.

Als weiterer Vorteil muß die niedere Belastung der Umwelt gesehen werden. Erschütterungen sind durch das Fehlen von dynamischen Belastungen nicht gegeben. Damit ist eine Aufstellung auch auf Decken mit entsprechender statischer Belastbarkeit möglich. Die Lärmbelastung beim Einbringen des Sandes ist in der Stufe I unbedeutend und in Stufe II weit unter den zulässigen Grenzwerten.Another advantage is the low environmental impact. The absence of dynamic loads does not cause vibrations. This means that it can also be installed on ceilings with the appropriate static load capacity. The noise level when the sand is introduced is insignificant in stage I and far below the permissible limit values in stage II.

Vorteilhaft ist auch die Einsparung von Kohlenstaub oder einem ähnlichen Zusatz im Hinterfüllsand, das sich in einer höheren Gasdurchlässigkeit günstig auswirkt.It is also advantageous to save coal dust or a similar additive in the backfill sand, which has a favorable effect on higher gas permeability.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt. Es zeigt:An embodiment of the invention is shown in the drawings. It shows:

Figur 1 - oben - Station B/1Figure 1 - above - station B / 1

Der Schleuderkopf 7 in der Zufuhrleitung für Naßgußsand 5 arbeitet im Prinzip ähnlich einem Sandslinger in 2 Drehzahl-Bereichen. Dadurch wird ermöglicht, daß bei extrem ungünstigen Modellpartien bereits in Stufe I eine Vorverdichtung durch Umschalten auf Stufe II kurzzeitig erreicht werden kann.The centrifugal head 7 in the feed line for wet cast sand 5 works in principle similar to a sand sling in 2 speed ranges. This makes it possible that, in the case of extremely unfavorable model parts, pre-compression can be achieved for a short time by switching to level II.

Der Naßgußsand 5 wird auf dem Modell 1 in einer gleichstarken Schicht aufgebracht und von einer Elastikfolie 10 überdeckt. Diese ist zunächst durch Vakuum 8 an der Unterseite des Preßhauptes 11 angesaugt und wird nach dem Aufsetzen auf den Formkasten 4 mittels Druckluft 9 mittels Pulsator 12 auf die Sandoberfläche gedrückt. Hierbei ist das Preßhaupt 11 mittels Hydraulikzylinder 13 arretiert. Danach wird das Preßhaupt 11 kurzzeitig über Schienen 14 entfernt und die Hinterfüllung 6 aufgetragen.The wet cast sand 5 is applied to the model 1 in an equally thick layer and covered by an elastic film 10. This is first sucked in by vacuum 8 on the underside of the press head 11 and, after being placed on the molding box 4, is pressed onto the sand surface by means of compressed air 9 using a pulsator 12. Here, the press head 11 is locked by means of hydraulic cylinders 13. Then the press head 11 is briefly removed via rails 14 and the backfill 6 is applied.

Fig. 1 - unten - Station D/1Fig. 1 - below - station D / 1

Modell 1, Modellplatte 2 und Plattenträger 3 bilden eine Einheit, die zwischen den Stationen B/1 und D/1 pendelt. Um beim Verdichten über die Folie 10 die Luft schnell aus dem Formkasten 4 abzuführen, sind Luftdüsen 4' in verschiedenen Höhen angebracht. Auch in der Modellplatte 2 sind Luftdüsen 2' zum Abheben des Kastens 4 angeordnet, über die Druckluft 17 zwischen Modell und Ballen gedrückt wird. Das endgültige Ausheben aus dem Modell übernimmt die Rollenbahn 18.Model 1, model plate 2 and plate carrier 3 form a unit that oscillates between stations B / 1 and D / 1. In order to quickly remove the air from the molding box 4 when compressing via the film 10, air nozzles 4 'are attached at different heights. Air nozzles 2 ′ for lifting the box 4 are also arranged in the model plate 2, via which compressed air 17 is pressed between the model and the bale. The roller conveyor 18 takes over the final lifting out of the model.

Fig. 2 zeigt die Anordnung der Leiste 15 mit dem Schiebebolzen 16, der beim Zulegen über den Bolzen 16a automatisch zurückgezogen und den Kasten zum Abziehen freigibt.Fig. 2 shows the arrangement of the bar 15 with the sliding bolt 16, which automatically retracts when the bolt 16a is tightened and releases the box for removal.

Fig. 3 und 4 zeigen das Beschwergewicht, das eine gleichmäßige Belastung des Ballens gewährleistet. Eine einwandfreie Abdichtung der Trennfuge zwischen Ober- und Unterkasten ist gegeben, wenn jedes Kastenpaar gemeinsam gefertigt ist.3 and 4 show the weight, which ensures an even load on the bale. A perfect seal of the parting line between the upper and lower box is given when each box pair is made together.

Fig. 5 zeigt eine Form- und Gießanlage als Beispiel, das die günstigen Transportwege der verschiedenen Einrichtungsteile darstellt.Fig. 5 shows a molding and casting plant as an example, which represents the favorable transport routes of the various parts of the device.

Der Weg des Unterkastens führt auf der UT-Linie von Station B/1 -G/1 - G/3 - B/2 zurück nach B/1.The way of the lower box leads on the UT line from station B / 1 -G / 1 - G / 3 - B / 2 back to B / 1.

Der Oberkasten durchläuft die selben Stationen auf der OT-Linie. Die Transport-Palette wird bei E/1 aufgelegt und läuft über G/1 - G/2 -H/1... - K/2 - I/1 - I/2...K/3 - L bzw. M-Linie nach M/1 und zurück nach E/1.The top box runs through the same stations on the OT line. The transport pallet is placed at E / 1 and runs via G / 1 - G / 2 -H / 1 ... - K / 2 - I / 1 - I / 2 ... K / 3 - L or M - Line to M / 1 and back to E / 1.

Das Beschwergewicht wird bei K/2 aufgesetzt und läuft über I/1 in die Gießstrecke 1/2... Nach dem Ausfahren aus der Gießstrecke wird das Beschwergewicht bei K/3 abgehoben und nach K/2 übergesetzt.The weight is put on at K / 2 and runs over I / 1 into the casting line 1/2 ... After leaving the casting line, the weight is lifted off at K / 3 and transferred to K / 2.

Gießstrecke:

  • Gegossen wird in Gruppen von 5-8 Formen, je nach Wandstärke der Gußteile. Jede Form wird vor dem Gießen um 5 gekippt, um eine großflächige Anstrahlung des Oberballens während des Füllens zu vermeiden. Die gegossenen Formen bleiben in der Gießstrecke bis zum Erstarren der Außenhaut stehen. Erst dann wird die Kippstellung in die Waagrechte gebracht, beim Ausfahren auf Station K/4 das Beschwergewicht abgehoben und auf einen ankommenden Ballen auf Station K/3 umgesetzt. Damit beginnt ein neuer Zyklus.
Casting line:
  • Casting is done in groups of 5-8 shapes, depending on the wall thickness of the castings. Before pouring, each mold is tilted by 5 to prevent the upper bale from being exposed to large areas during filling. The cast molds remain in the casting section until the outer skin solidifies. Only then is the tipping position brought to a horizontal position, the weight of the weight lifted off when moving out to station K / 4 and transferred to an incoming bale at station K / 3. This starts a new cycle.

Erklärender Text zu Fig. 5Explanatory text for Fig. 5

  • A1 Mod-Pl-Träger Aus-/EinfahrenA1 Mod-Pl carrier extend / retract
  • 2 Mod-PI-Vorwärmen2 Mod PI preheating
  • 3 Mod-PI-Montage3 Mod PI assembly
  • BI Sandeinfüllen St.l,2BI sand filling St.l, 2
  • 2 F-Kasten OK-UK trennen2 Disconnect the F-box OK-UK
  • 3 Halteleiste in OK eins.3 holding bar in OK one.
  • Cl FrässtationCl milling station
  • 2 Sandbunker St.l,22 sand bunkers St.l, 2
  • D1 PreßstationD1 press station
  • 2 Preßhaupt ausgefahren2 Press head extended
  • 3 Folienrolle3 film roll
  • E1 Tr-Pal.einfahren wenden/UK einfahren wendenTurn in E1 retract door pallet / turn in UK
  • 2 OK wenden2 OK turn
  • F1 Kerne einlegenInsert F1 cores
  • 2 Kasten reinigen2 Clean the box
  • 3 Bohrstation3 drilling station
  • G1 OK bez. UK drehenG1 OK UK turn
  • 2 OK zulegen OK UK abziehen2 OK add OK subtract UK
  • 3 OK UK absetzen H-Leisten v.Hl3 OK UK lower H-strips from St.
  • G4 OK wendenTurn G4 OK
  • Hl Halteleisten n.G3Hl retaining strips n.G3
  • 1 ...Lagerpuffer1 ... storage buffer
  • I1 Kontrolle, einwandfr. Sitz des Beschw.Gew.I1 control, perfect. Seat of the weighting weight
  • 2 ...Kippen um ~ 5° Gießen2 ... tilt by ~ 5 ° pour
  • K1 Transp.Pal.reinigenClean K1 Transp.Pal.
  • 2 Beschwergew.aufsetz.2 weighting attachment.
  • 3 Beschwergew.abziehen n.K2 transportieren3 Pull the weight off after transporting to K2
  • L1-L4 LagerpufferL1-L4 storage buffer
  • M1 Drehen/Abschieben des BallensM1 Rotate / push off the bale
  • 2-5 Lagerpuffer2-5 storage buffers
  • N1 Transportband der KühlstreckeN1 conveyor belt of the cooling section

Claims (5)

1. Verfahren zur Herstellung von Naßguß-Formteilen im Großformat zum kastenlosen Gießen,
dadurch gekennzeichnet,
daß in der Füllstufe 1 der Naßgußsand (5) in einen Formkasten (4), der die Sandoberfläche auf der Modellplatte (2) begrenzt und über ein Schleuderrad (7), das zur Schonung der Modelleinrichtung mit verminderter Drehzahl umläuft, auf ein Modell (1) in einer Schicht allseitig aufgetragen, mit einem elastischen Material abgedeckt und verdichtet wird.1. Process for the production of wet cast molded parts in large format for boxless casting,
characterized,
that in the filling stage 1 of the wet casting sand (5) into a molding box (4), which delimits the sand surface on the model plate (2) and via a centrifugal wheel (7), which rotates at a reduced speed to protect the model device, onto a model (1 ) applied in one layer on all sides, covered with an elastic material and compacted. 2. Einrichtung zur Durchführung des Verfahrens nach Anspruch 1 zur Verdichtung des Sandes in der Stufe I,
dadurch gekennzeichnet,
daß ein Preßhaupt (11), auf dessen Unterseite eine Elstikfolie (10) durch Vakuum (8) festgehalten wird, nach dem Unterfahren der Modelleinrichtung mit dem Plattenträger (3) auf den Formkasten aufgesetzt und durch Hydraulikzylinder (13) arretiert wird, daß danach über eine Zuführung (9) Druckluft auf die Elastikfolie (10) geführt und diese auf die Sandoberfläche gedrückt wird, daß in einem Pulsator (12) der Druck im Wechsel über einen schwingenden Kolben durch Öffnen und Schließen der Luftaustrittsöffnung entspannt und wieder aufgebaut wird, und daß die durch diesen Wechsel entstehenden Luftstöße auf die Folie (10),die auf die Sandschicht (5) übertragen werden, eine allseitig gleichmäßige Verdichtung des Naßgußsandes erzeugen.2. Device for carrying out the method according to claim 1 for compacting the sand in stage I,
characterized,
that a press head (11), on the underside of which an elastic film (10) is held in place by vacuum (8), is placed on the mold box after passing under the model device with the plate carrier (3) and locked by hydraulic cylinders (13), that after that a feed (9) compressed air on the elastic film (10) and this is pressed onto the sand surface, that in a pulsator (12) the pressure is alternately relaxed and rebuilt via an oscillating piston by opening and closing the air outlet opening, and that The resulting air blasts on the film (10), which are transferred to the sand layer (5), produce a uniform compression of the wet cast sand on all sides. 3. Einrichtung zur Durchführung des Verfahrens nach Anspruch 1 zur Verdichtung des Sandes in der Füllstufe II,
dadurch gekennzeichnet,
daß zur Hinterfüllung (6) ein Sand ohne den Zusatzstoff "Kohlenstaub" über einen Schleuderkopf (7), mit voller Umdrehungszahl aufgetragen wird, daß danach die über den Kastenrand gefüllte Form auf dem Weg zu einer Preßstation auf gleiche Höhe abgefräst und durch das Preßhaupt (11) über Hydraulikzylinder (13) endverdichtet wird.3. Device for performing the method according to claim 1 for compacting the sand in the filling stage II,
characterized,
that for the backfill (6) a sand without the additive "coal dust" is applied via a centrifugal head (7) at full speed, that afterwards the mold filled over the edge of the box is milled off on the way to a press station at the same height and through the press head ( 11) is finally compressed using hydraulic cylinders (13). 4. Einrichtung nach Anspruch 2 und 3,
dadurch gekennzeichnet,
daß der Form-Oberkasten (4) mit durch Schiebebolzen (16) gehaltene Leisten (15) versehen ist, die den Sandballen gegen Herausfallen sichern.4. Device according to claim 2 and 3,
characterized,
that the upper mold box (4) is provided with bars (15) held by sliding bolts (16), which secure the sand bale against falling out. 5. Einrichtung nach Anspruch 2 und 3,
dadurch gekennzeichnet,
daß in einem Außenrahmen (19) ein Paket Beschwergewichte (20) lose eingelegt sind, die eine gleichmäßige Belastung des Formballens ergeben und daß unter dem Rahmen (19) ein Dichtungsrahmen (21) federnd aufgehängt ist, der die Trennfuge zwischen Ober- und Unterballen abdichtet.5. Device according to claim 2 and 3,
characterized,
that in a outer frame (19) a package of weights (20) are loosely inserted, which result in a uniform loading of the bale of form and that under the frame (19) a sealing frame (21) is resiliently suspended, which seals the joint between the upper and lower bales .
EP19830105691 1982-07-06 1983-06-10 Method of producing large size green sand moulding parts (mould area 1-3 m2) for pouring into flaskless moulds Expired EP0098405B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823225197 DE3225197A1 (en) 1982-07-06 1982-07-06 METHOD AND DEVICE FOR PRODUCING LARGE-SIZED WET MOLDED PARTS (SHAPED SURFACE (SINGLE WAVE LINE) 1-3M (ARROW HIGH) 2 (ARROW HIGH)) FOR CASELESS CASTING
DE3225197 1982-07-06

Publications (2)

Publication Number Publication Date
EP0098405A1 true EP0098405A1 (en) 1984-01-18
EP0098405B1 EP0098405B1 (en) 1986-01-15

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EP19830105691 Expired EP0098405B1 (en) 1982-07-06 1983-06-10 Method of producing large size green sand moulding parts (mould area 1-3 m2) for pouring into flaskless moulds

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EP (1) EP0098405B1 (en)
JP (1) JPS5921447A (en)
DE (1) DE3225197A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985001899A1 (en) * 1983-11-02 1985-05-09 Buehler Eugen Moulding installation
FR2575946A1 (en) * 1985-01-15 1986-07-18 Fm Ind Method and machine for manufacturing a mould from agglomerated sand
EP1880781A1 (en) * 2005-05-10 2008-01-23 Sintokogio, Ltd. Flaskless molding method
CN102548685A (en) * 2010-07-23 2012-07-04 新东工业株式会社 Snap flask mold molding method and snap flask mold molding apparatus
CN111299502A (en) * 2020-04-22 2020-06-19 安徽省胜峰机械有限公司 Precoated sand injection system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0519509U (en) * 1991-08-29 1993-03-12 三菱自動車工業株式会社 Engine oil jet structure
US10447053B2 (en) 2016-12-27 2019-10-15 Panasonic Intellectual Property Management Co., Ltd. Terminal
CN117773022B (en) * 2023-12-31 2024-05-31 芜湖市容川机电科技股份有限公司 Nodular cast iron lost foam sand box

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2407878B1 (en) * 1974-02-19 1975-05-15 Wagner Maschf Heinrich Boxless mold
US4043376A (en) * 1976-06-16 1977-08-23 Nippon Gakki Seizo Kabushiki Kaisha Casting process by vacuum molding
DE2820901A1 (en) * 1977-05-20 1978-12-21 Sintokogio Ltd METHOD AND DEVICE FOR FORMING A SPRING FUNNEL OR A CONNECTION OPENING IN A DEVICE SEALED MOLD
DE2845563A1 (en) * 1977-10-21 1979-05-10 Nippon Musical Instruments Mfg OVERZUGS- OR ACCOVER FILMS FOR THE CASTING PROCESS WITH SEALED VACUUM CASTING FORM
DE3212259A1 (en) * 1981-06-19 1983-01-05 VEB Kombinat Gießereianlagenbau und Gußerzeugnisse - GISAG -, DDR 7031 Leipzig Method and apparatus for supporting and loading boxless sand moulds

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50140457U (en) * 1975-05-07 1975-11-19

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2407878B1 (en) * 1974-02-19 1975-05-15 Wagner Maschf Heinrich Boxless mold
US4043376A (en) * 1976-06-16 1977-08-23 Nippon Gakki Seizo Kabushiki Kaisha Casting process by vacuum molding
DE2820901A1 (en) * 1977-05-20 1978-12-21 Sintokogio Ltd METHOD AND DEVICE FOR FORMING A SPRING FUNNEL OR A CONNECTION OPENING IN A DEVICE SEALED MOLD
DE2845563A1 (en) * 1977-10-21 1979-05-10 Nippon Musical Instruments Mfg OVERZUGS- OR ACCOVER FILMS FOR THE CASTING PROCESS WITH SEALED VACUUM CASTING FORM
DE3212259A1 (en) * 1981-06-19 1983-01-05 VEB Kombinat Gießereianlagenbau und Gußerzeugnisse - GISAG -, DDR 7031 Leipzig Method and apparatus for supporting and loading boxless sand moulds

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985001899A1 (en) * 1983-11-02 1985-05-09 Buehler Eugen Moulding installation
EP0144727A1 (en) * 1983-11-02 1985-06-19 Eugen Dipl.-Ing. Bühler Moulding plant
FR2575946A1 (en) * 1985-01-15 1986-07-18 Fm Ind Method and machine for manufacturing a mould from agglomerated sand
EP1880781A1 (en) * 2005-05-10 2008-01-23 Sintokogio, Ltd. Flaskless molding method
EP1880781A4 (en) * 2005-05-10 2009-07-22 Sintokogio Ltd Flaskless molding method
US8056605B2 (en) 2005-05-10 2011-11-15 Sintokogio, Ltd. Flaskless molding method
CN102548685A (en) * 2010-07-23 2012-07-04 新东工业株式会社 Snap flask mold molding method and snap flask mold molding apparatus
CN102548685B (en) * 2010-07-23 2014-08-27 新东工业株式会社 Snap flask mold molding method and snap flask mold molding apparatus
CN111299502A (en) * 2020-04-22 2020-06-19 安徽省胜峰机械有限公司 Precoated sand injection system

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JPS5921447A (en) 1984-02-03
DE3225197A1 (en) 1984-01-12
JPS6159811B2 (en) 1986-12-18
EP0098405B1 (en) 1986-01-15

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