EP0089547B1 - Procédé et dispositif pour compacter du sable de moulage de fonderie - Google Patents

Procédé et dispositif pour compacter du sable de moulage de fonderie Download PDF

Info

Publication number
EP0089547B1
EP0089547B1 EP83102255A EP83102255A EP0089547B1 EP 0089547 B1 EP0089547 B1 EP 0089547B1 EP 83102255 A EP83102255 A EP 83102255A EP 83102255 A EP83102255 A EP 83102255A EP 0089547 B1 EP0089547 B1 EP 0089547B1
Authority
EP
European Patent Office
Prior art keywords
gas
mass
mold
pattern
molding material
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
Application number
EP83102255A
Other languages
German (de)
English (en)
Other versions
EP0089547A1 (fr
Inventor
Alfons Ing. grad. Köbel
Norbert Ing. Grad. Damm
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.)
BMD Badische Maschinenfabrik Durlach GmbH
Original Assignee
BMD Badische Maschinenfabrik Durlach 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6158983&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0089547(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by BMD Badische Maschinenfabrik Durlach GmbH filed Critical BMD Badische Maschinenfabrik Durlach GmbH
Priority to AT83102255T priority Critical patent/ATE19973T1/de
Publication of EP0089547A1 publication Critical patent/EP0089547A1/fr
Application granted granted Critical
Publication of EP0089547B1 publication Critical patent/EP0089547B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor

Definitions

  • the invention relates to a method and a device for compacting foundry molding material, in particular wet molding sand, by the sudden action of gas pressure on the molding material heaped over the model.
  • Compression methods of this type are known in several embodiments (e.g. DE-B-1 961 234, DE-A-29 49 340) and have recently gained increasing economic importance. They differ essentially in the way in which the pressure wave is generated. For example, either a high-pressure gas contained in a pre-pressure space is suddenly released (DE-B-1 961 234) or the gas pressure is generated directly above the molding space by the explosion of a combustible gas mixture. In addition to these two basic methods, a large number of variants are known, which need not be discussed here, since they do not affect the invention. In all embodiments, the pressure wave generated hits the molding material surface and then leads to compression of the molding material.
  • the degree of compression depends not only on the parameters (pressure, speed) of the gas pressure wave, but also on the height of the molding material filling.
  • the mold material coverage of the model below which a satisfactory degree of compaction can no longer be achieved.
  • the molding material coverage above which the mold back in particular no longer has sufficient compression. It is therefore usually worked with an excess of molding material, which in the former case leads to an unnecessary height of the mold, in the second case to an unnecessary excess of molding material which must be stripped off after compression.
  • the invention is based on the object of proposing a method and a device with the aid of which uniform compaction over the mold height can be achieved with a minimal requirement for molding material.
  • This object is achieved in that a gas-permeable, freely movable additional mass is loosely placed on the free molding material surface and that the gas pressure is brought into effect on the free surface of the additional mass.
  • the invention also differs from other known proposals, according to which a cover is placed on the surface of the molding material. This acts, even if it is made of elastic material (US-A-2 830 339), practically like a compression piston, without the compression gas being able to penetrate into the molding material bed.
  • a cover is placed on the surface of the molding material. This acts, even if it is made of elastic material (US-A-2 830 339), practically like a compression piston, without the compression gas being able to penetrate into the molding material bed.
  • DE-A-29 49 340 in which the molding surface is completely or partially provided with a gas-impermeable cover in the course of an explosion compression. This is said to either prevent the molding material from crumbling at the back of the mold or to provide less densely compressed areas at the covered areas.
  • the molding surface is approximately uniformly flat, which cannot be achieved with the previously known methods. Due to the optimization of the molding material mass, the molding material supernatant, which is necessary in many cases, can be better regulated and, above all, set at a lower height.
  • the gas energy ie the gas pressure and / or the gas volume, can be reduced compared to the known methods with the additional mass, so that in particular there is a reduction in the gas requirement.
  • the fiction can Carry out appropriate procedures regardless of whether the molding material is compressed from above or from below.
  • the additional mass consists of several individual masses which are movable in the direction perpendicular to the molding material surface, it is ensured that each individual mass can move in accordance with the impulse force communicated by the pressure wave and pass it on to the molding material particles.
  • the additional mass has a distribution of the individual mass adapted to the contour of the model in such a way that the mass is lower over high model contours than over deep contours.
  • the invention is based on a device with a mold box closed on one side by a model plate with the model, a filling frame that continues this, and a device for generating or storing gas at high pressure, which suddenly has an effect on the molding material in the filling frame brought.
  • Such a device is characterized in accordance with the invention in that a gas-permeable additional mass which covers this in total can be placed on the free molding material surface and can be removed therefrom after compression.
  • the additional mass is thus in each working cycle of the device, for. B. a molding machine, placed on the molding material filled in the mold space, then brought the gas pressure wave to effect and after venting the mold space, the additional mass removed from the compressed mold.
  • the additional mass can be formed from a perforated plate, but in a preferred embodiment of the device consists of particles of greater specific weight than the molding material and a gas-permeable and flexible covering enclosing these particles.
  • the flow resistance of this additional mass and thus the thrust force generated by it can be influenced by the particle shape and its bulk density, so that regulation of the desired effects is possible not only via the size of the additional mass, but also via the aforementioned parameters.
  • the additional mass advantageously consists of a bed of metal particles and a fabric enclosing them.
  • the metal particles can be, for example, granules, shot or the like, while the fabric can be made of plastic or - in the case of compression by explosive forces with corresponding temperature development - made of wire.
  • the additional mass constructed in this way is, at least to a limited extent, freely suspended or supported, so that it can be placed and removed on the one hand and can follow the forces acting on it unhindered on the other hand.
  • a model plate 1 with a model 2 can be seen, which closes a molding box 3 on the underside.
  • a filling frame 4 is placed on the molding box 3 and is continued in a gas collecting space 5.
  • an end plate 6 can be seen as an integral part of a machine stand, against which the parts of the molding space are pressed before the compression process.
  • the devices necessary for the manipulation of the molding box 3, the filling frame 4 and the gas collecting space 5, as well as those for filling the molding space with molding sand, can be of a conventional type and are therefore not shown in detail.
  • a container 7 is connected to the gas collecting space 5 via a line 8, in which container either compressed gas is stored or is generated by the explosion of a combustible gas mixture.
  • a valve can optionally be arranged which, after opening, allows the pressure wave to pass into the gas collecting space.
  • This device also includes an additional mass 10 which is placed on the free molding material surface 11 within the filling frame 4 before the compression process.
  • This additional mass 10 consists of an outer shell 12, for example a perforated plate, a fabric or the like. And a filling 13 enclosed by this of particles of high specific weight, for. B. metal granules, metal shot or the like.
  • the additional mass is fastened to a lifting device 14 by means of a pull rope 15, by means of which it can be lowered onto the surface of the molding material and later lifted from the compacted form.
  • the traction cable 15 gives the additional mass 10 the freedom of movement necessary for the compression stroke in the direction perpendicular to the molding material surface.
  • the additional mass can also be mounted on the lifting device 14 via a pawl which engages with a corresponding catch on the additional mass in order to be able to lift it off the finished shape. To apply the additional mass, this latch then only has to be loosened so that it falls on the molding material filling.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Mold Materials And Core Materials (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Claims (7)

1. Procédé pour le compactage ou serrage d'une matière de moule de fonderie, notamment pour le compactage du « sable vert par action brusque de la pression d'un gaz sur cette matière versée sur le modèle, caractérisé en ce qu'une masse additionnelle perméable aux gaz pouvant se déplacer librement est posée sur la surface libre de ladite matière et que l'on-fait agir la pression du gaz sur la surface libre de ladite masse additionnelle. -
2. Procédé selon la revendication 1, caractérisé en ce que la masse additionnelle est composée de plusieurs masses distinctes mobiles dans la direction perpendiculaire à la surface de la matière de moule.
3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la répartition des masses distinctes de la masse additionnelle est adaptée à la forme du modèle en ce sens que ladite masse additionnelle est plus petite sur les parties hautes du modèle que sur les parties basses.
4. Dispositif pour la mise en oeuvre du procédé selon l'une des revendications 1 à 3, comprenant essentiellement un moule (3) fermé à une extrémité par une plaque modèle (1) portant le modèle (2) et prolongé par un châssis de remplissage (4), et un dispositif pour la production ou l'accumulation de gaz à haute pression que l'on fait agir brusquement sur la matière de moule dans le châssis de remplissage, caractérisé en ce qu'une masse additionnelle perméable aux gaz et pouvant se déplacer librement (10) peut être posée sur la surface libre (11) de la matière de moule qu'elle recouvre entièrement et dont elle peut être enlevée après l'opération de compactage.
5. Dispositif selon la revendication 4, caractérisé en ce que la masse additionnelle (10) est composée de particules de poids spécifique plus grand que celui de la matière de moule et d'une enveloppe perméable aux gaz et flexible entourant ces particules.
6. Dispositif selon la revendication 5, caractérisé en ce que la masse additionnelle (10) est composée de particules métalliques en vrac (13) et d'un tissu (12) entourant l'ensemble de ces particules.
7. Dispositif selon l'une des revendications 4 à 6, caractérisé en ce que la masse additionnelle (10) est suspendue ou supportée de façon mobile lui permettant de se déplacer librement, tout au moins entre certaines limites.
EP83102255A 1982-03-23 1983-03-08 Procédé et dispositif pour compacter du sable de moulage de fonderie Expired EP0089547B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83102255T ATE19973T1 (de) 1982-03-23 1983-03-08 Verfahren und vorrichtung zum verdichten von giessereiformstoff.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3210504 1982-03-23
DE3210504 1982-03-23

Publications (2)

Publication Number Publication Date
EP0089547A1 EP0089547A1 (fr) 1983-09-28
EP0089547B1 true EP0089547B1 (fr) 1986-05-28

Family

ID=6158983

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83102255A Expired EP0089547B1 (fr) 1982-03-23 1983-03-08 Procédé et dispositif pour compacter du sable de moulage de fonderie

Country Status (7)

Country Link
US (1) US4538664A (fr)
EP (1) EP0089547B1 (fr)
JP (1) JPS58173056A (fr)
AT (1) ATE19973T1 (fr)
DD (1) DD207343A5 (fr)
DE (1) DE3363683D1 (fr)
PL (1) PL241133A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3317196A1 (de) * 1983-05-11 1984-11-22 BMD Badische Maschinenfabrik Durlach GmbH, 7500 Karlsruhe Vorrichtung zum verdichten von giessereiformsand
CH659782A5 (de) * 1983-06-02 1987-02-27 Fischer Ag Georg Verfahren und vorrichtung zum verdichten von koernigen formstoffen.
DE3321955A1 (de) * 1983-06-18 1984-12-20 BMD Badische Maschinenfabrik Durlach GmbH, 7500 Karlsruhe Vorrichtung zum verdichten von giesserei-formstoff mittels druckgas
CH666426A5 (de) * 1984-06-25 1988-07-29 Fischer Ag Georg Formanlage.
US5535809A (en) * 1993-11-24 1996-07-16 Grand Haven Brass Foundry Method and apparatus for packing a granular material for foundry use
JP3273582B2 (ja) 1994-05-13 2002-04-08 キヤノン株式会社 記憶装置
ES2131433B1 (es) * 1996-01-18 2000-03-01 Loramendi Sa Dispositivo de alta compactacion para maquinas de moldeo de cajas de arena por impacto de aire.
WO1998045070A1 (fr) * 1997-04-08 1998-10-15 Loramendi, S.A. Dispositif de compactage eleve pour machines de moulage de caisses de sable par pression d'air

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1961234C3 (de) * 1969-12-05 1975-02-06 Kramatorskij Nautschno-Issledowatel' Skij I Projektno-Technologitscheskij Institut Maschinostrojenija, Kramatorsk (Sowjetunion) Verfahren und Vorrichtung zum Verdichten von GieBereiformmassen
JPS6047030B2 (ja) * 1977-09-01 1985-10-19 新東工業株式会社 鋳型造型機
JPS5581041A (en) * 1978-12-12 1980-06-18 Sintokogio Ltd Mold molding method
AT381877B (de) * 1978-12-15 1986-12-10 Fischer Ag Georg Verfahren und vorrichtung zum verdichten von koernigen stoffen, insbesondere giessereiformstoff
GB2079654B (en) * 1980-07-09 1984-04-26 Sintokogio Ltd Moulding method and apparatus
JPS5722848A (en) * 1980-07-12 1982-02-05 Sintokogio Ltd Method for making mold

Also Published As

Publication number Publication date
DE3363683D1 (en) 1986-07-03
JPS58173056A (ja) 1983-10-11
PL241133A1 (en) 1984-01-02
EP0089547A1 (fr) 1983-09-28
US4538664A (en) 1985-09-03
ATE19973T1 (de) 1986-06-15
DD207343A5 (de) 1984-02-29

Similar Documents

Publication Publication Date Title
DE2844464C2 (de) Verfahren und Vorrichtung zum Verdichten von Gießformen
EP0295472B1 (fr) Procédé et dispositif pour le serrage de matière de moulage dans une machine à mouler pour fonderie
DD251300A5 (de) Verfahren und vorrichtung zum verdichten von giessereiformstoffen
EP0089547B1 (fr) Procédé et dispositif pour compacter du sable de moulage de fonderie
DE2608740C2 (de) Verfahren zum Verdichten von Formsand
CH686412A5 (de) Verfahren zum Verdichten von Formsand fuer Giessformen.
EP0170765A1 (fr) Dispositif pour comprimer du matériel de moulage pour fonderies
DE2933869C2 (de) Verfahren und Vorrichtung zum Herstellen eines unteren Formteils
EP0128336B1 (fr) Dispositif pour le serrage de sable de fonderie
EP0131723B1 (fr) Dispositif pour le serrage de matière de moulage de fonderie à l'aide de gaz comprimé
DE2923102A1 (de) Verfahren zum verdichten von giessereiformsand und formmaschine zur durchfuehrung des verfahrens
DE1058702B (de) Verfahren und Vorrichtung zur maschinellen Herstellung von Giessereiformen aus Formsand
DE2701693C2 (de) Formmaschine zum Herstellen von Gießformen
EP0203322B1 (fr) Dispositif pour compacter un matériau de moulage de fonderie à l'aide d'un gaz de compression
DE1583526B1 (de) Verfahren und Formanlage zum Herstellen waagrecht geteilter kastenloser Sandformen mittels doppelseitiger horizontaler Modellplatte,Formrahmen und vertikal beweglichem Pressstempel
DE1155883B (de) Verfahren zur Herstellung von Kernen und Formen fuer Giessereizwecke
DE4023180C1 (en) Press forming machine - has venting opening in hood enclosing pressure plate, filling frame and moulded, to prevent air ingress
DE3839475C2 (fr)
DE3329585C2 (fr)
DE901334C (de) Verfahren und Maschine zur Herstellung von Giessformen
DE1583526C (de) Verfahren und Fromanlage zum Her stellen waagrecht geteilter kastenloser Sandformen mittels doppelseitiger hon zontaler Modellplatte, Formrahmen und vertikal beweglichem Preßstempel
DE2852742C2 (de) Verfahren und Vorrichtung zum Ausbringen von Giesserei-Sandballen aus Formkästen
DE1108384B (de) Verfahren und Vorrichtung zum Einfuellen und Vorverdichten koerniger Massen in Giessereiformkasten
DE2712489B2 (de) Vorrichtung zum Einfüllen und Verdichten des Formsandes bei der Herstellung von Sandformen für Gießereizwecke
DE3842031A1 (de) Einrichtung zum verdichten von koernigen formstoffen

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT CH DE FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19840218

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE FR GB IT LI NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19860528

REF Corresponds to:

Ref document number: 19973

Country of ref document: AT

Date of ref document: 19860615

Kind code of ref document: T

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19860531

ET Fr: translation filed
REF Corresponds to:

Ref document number: 3363683

Country of ref document: DE

Date of ref document: 19860703

ITF It: translation for a ep patent filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19870308

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: GEORG FISCHER AG

Effective date: 19870227

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19871130

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PLBM Termination of opposition procedure: date of legal effect published

Free format text: ORIGINAL CODE: 0009276

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: OPPOSITION PROCEDURE CLOSED

27C Opposition proceedings terminated

Effective date: 19871024

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19881122

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19890331

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19890531

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19900331

Ref country code: CH

Effective date: 19900331

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19901201