EP0326870B1 - Procédé et dispositif de compactage de sable de fonderie - Google Patents

Procédé et dispositif de compactage de sable de fonderie Download PDF

Info

Publication number
EP0326870B1
EP0326870B1 EP89100932A EP89100932A EP0326870B1 EP 0326870 B1 EP0326870 B1 EP 0326870B1 EP 89100932 A EP89100932 A EP 89100932A EP 89100932 A EP89100932 A EP 89100932A EP 0326870 B1 EP0326870 B1 EP 0326870B1
Authority
EP
European Patent Office
Prior art keywords
press
phase
sand
frame
housing
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
EP89100932A
Other languages
German (de)
English (en)
Other versions
EP0326870A1 (fr
Inventor
Alois Werner Jung
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.)
FOUNDRY DESIGN CORP EUROPE
Original Assignee
FOUNDRY DESIGN CORP EUROPE
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 FOUNDRY DESIGN CORP EUROPE filed Critical FOUNDRY DESIGN CORP EUROPE
Priority to AT89100932T priority Critical patent/ATE76341T1/de
Publication of EP0326870A1 publication Critical patent/EP0326870A1/fr
Application granted granted Critical
Publication of EP0326870B1 publication Critical patent/EP0326870B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B22C15/28—Compacting by different means acting simultaneously or successively, e.g. preliminary blowing and finally pressing
    • B22C15/30—Compacting by different means acting simultaneously or successively, e.g. preliminary blowing and finally pressing by both pressing and jarring devices

Definitions

  • the invention relates to a method and a device for carrying out the method for compacting foundry molding sand, in which a progressive compression takes place in the vibratory pressing method, with a vibrating table, a molding frame, a filling frame that absorbs the excess sand, a multi-stamp consisting of a press housing with a large number of press dies. Press head and a vibration unit supported by springs and equipped with unbalance motors.
  • the most advantageous method with a satisfactory degree of compaction for each model form has proven to be the vibrating press method, as a combination of two methods in which the advantages of a mechanical vibrating device are paired with the advantages of a compaction head.
  • the machine comprises a frame construction through which a horizontal conveyor leads, which serves as a feeder and guide for the objects to be treated by the machine.
  • the frame construction carries a ramming device at the top with a so-called compression head consisting of a plurality of fluid cylinders and a vibration device at the bottom.
  • the vibrating device has an anvil supported on springs, which can be brought into engagement with the mold-making station by a lifting means and is effectively connected to a shock-vibrating device also supported on springs.
  • the vibrating device is switched on and the vertical oscillating movements are transmitted to the anvil or to the mold production station.
  • a disadvantage of the latter is that the shaking movement is generated by the impact of the anvil or hammer on the underside of the press table, which results in a very strong impact delay and considerable noise.
  • a disadvantage of both known devices is that the compacting head, which consists of a large number of press cylinders, compresses the sand, particularly in the area of the compacting heads, while unpressed and partially loose sand predominates between the individual compacting heads and around the compacting heads themselves. It has also been shown that most known devices for the production of casting molds cannot take full account of the given sand properties.
  • the invention is therefore based on the object of improving the inadequate consideration of the sand properties in various operating sands and to propose a method and a device for carrying out the method for compacting foundry mold sand for the production of mold parts, with which a procedural and operational optimization of the sand-dependent shape parameters is achieved can be so that there is both a sufficient mold hardness and an ideal gas permeability of the molded parts.
  • the advantages achieved by the invention are essentially to be seen in the fact that a flexible adjustment of the compression parameters in the case of changing sand properties, in accordance with a hardness of the shape determined beforehand on a standard test specimen using the ball indentation method using the Brinell method, and uniformity in the case of widely varying model contours Compression is also possible with molded parts with very different model contours that overpressing or underpressing in extreme areas and the so-called bridging are prevented and clean and small casting puddles can be carried out.
  • 1, 2, 3, 4 and 5, 1 denotes a vibrating table.
  • a model plate carrier 4 with a model 5, a molding frame 2 and a filling frame 3 is fastened on the vibration table 1.
  • the model plate carrier 4 is used to hold a positive or a negative model plate 22.
  • molding sand 24 is filled in the molding frame 2 and in the filling frame 3.
  • the vibrating table 1 is supported on prestressed reactor springs 8 on an exciter frame 6.
  • the excitation frame 6 itself is supported on insulation springs 7 which rest on a machine foundation 19.
  • two unbalance motors 9 are arranged with opposite directions of rotation. At least one solid is on the machine foundation 19
  • Stop bar 10 constructed with a support plate 20, which interacts with a support chuck 21 of the vibration table 1.
  • a vertically movable multi-punch press head 11 is provided above the vibrating table 1.
  • the multi-die press head 11 consists of three press units, the press housing 12, a mother plate 13 and a number of press dies 14. Each of these press units can be actuated individually and independently of the others.
  • the press housing 12 has an outer piston / cylinder unit 16 with a pressure cylinder 17 and a pressure piston 18 and can be moved in the vertical direction.
  • the mother plate 13 is slidably guided in the press housing 12 on the inner walls and is moved parallel to the direction of movement of the press housing by a plurality of inner pistons / cylinder units 25 installed in the press housing 12.
  • the press punches 14 are slidably guided in the mother plate 13 parallel to the direction of movement of the mother plate 13 and are likewise moved by an inner piston / cylinder unit 26 installed in the press housing 12.
  • the supply lines 27, 28 for a pressure medium to the inner piston / cylinder units 25, 26 of the press housing 12 are integrated in the cover 15 of the press housing 12.
  • the sand metering device moves and the multi-stamp press head 11 moves in its place.
  • a sinusoidal force acts on the vibration system consisting of the vibrating table 1, exciter frame 6, insulation springs 7 and reactor springs 8, which resonates with the rhythm of the force acting and the forced frequency, with a linear, vertical oscillating movement from the exciter frame 6 to the Vibration table 1 is transmitted.
  • the ideal oscillation deflection can be set by adjusting the pretensioning force of the reactor springs 8 and the rotational speed of the unbalance motors 9 which can be infinitely regulated by means of a frequency converter, not shown.
  • the molding sand 24 is fluidized by the vibration and distributed evenly in the molding frame 2, in the filling frame 3 and along the contours of the model 5.
  • the complete multi-punch press head 11 is lowered in the vertical direction with the aid of the piston / cylinder unit 16 and moved into the sand, the press housing 12, the mother plate 13 and the Die 14 lie in a common press plane and thus form a contour press head.
  • the molding sand 24 is uniformly pre-compressed and deaerated in the press housing 12 by the multi-stamp press head 11 with an increasing pressure force of the outer piston / cylinder unit 16 with the same internal pressure of the inner piston / cylinder units 25, 26.
  • the pressure forces of the hydraulic systems are set so that the resulting total deflection of the insulation springs 7 and the reactor springs 8 of the vibration system is less than the distance between the support plate 20 of the stop beam 10 and the support chuck 21 of the vibrating table 1, ie the oscillating system vibrates freely at a high frequency without colliding with the stop beam 10.
  • the frame of the press housing 12 is immersed further in the molding sand 24 with the help of the outer piston / cylinder unit 16 and the press rams 14 with the aid of the inner piston / cylinder unit 26, while the mother plate 13 remains and the associated inner piston / cylinder units 25 are gradually compressed at a balanced pressure.
  • the immersion depth of the individual press punches 14 depends on the contour of the model 5, on the characteristics of the molding sand 24 and on the inner contour of the molding box 2.
  • the vibration system vibrates with compressed insulation springs 7 and reactor springs 8 still free.
  • a fourth phase the press-compression phase (see FIG. 4), the pressure in the outer piston / cylinder unit 16 and in the inner piston / cylinder units 25 assigned to the mother plate 13 is further increased, the frame of the press housing 12 and the mother plate 13 further compress the molding sand 24.
  • the vibration system is based on the stop bar 10 and the frequency of the geared motors 9 is reduced; the pressing phase begins.
  • a fifth phase the final compression phase (see FIG. 5)
  • the back of the mold is pressed through the frame of the press housing with the help of the outer piston / cylinder unit 16 and the inner piston / cylinder units 25 at an optimal contact pressure with the vibration table 1 resting on the stop beam 12 and the mother plate 13 pressed up finally the lower edge of the frame of the press housing 12 falls below the parting line between the molding frame 2 and the filling frame 3 and the pressure in the outer piston / cylinder unit 16 is released via a drain valve, not shown.
  • Suitable risers and pouring pits are either molded into the sand or cut into the molding sand after compaction.
  • the determination of the respective amount of molding sand, the setting of the various compressive forces for the individual pressing phases, the setting of the preload of the reactor springs 8 and the changes in the drive frequencies for the unbalance motors are coordinated with the respective molding sand properties, which are carried out before each start of work using a standard test specimen using the ball impression method according to Brinell method is determined.
  • press housing 12 such that individual press punches 14 or groups of press punches 14 can be acted upon separately.
  • the press heads known as multi-rams, equipped with directly adjacent press rams work after a short press travel through the teeth of the sand grains (cutting angle) same as a flat press.

Claims (6)

1. Procédé de compactage de sable de fonderie selon lequel il se produit un compactage progressif suivant le procédé de serrage par secousses,
caractérisé par un compactage continu pré-programmé et adapté à un état respectif du sable de fonderie (24) constaté sur un échantillon suivant la méthode Brinell, et suivant lequel,
- lors d'une première phase, une précontrainte de ressorts de réacteur (8) adaptée à une qualité de sable, à un modèle (5) et à une taille de châssis de moule est réglée, et la quantité de sable de fonderie est versée dans un châssis de moule (2) tandis que des moteurs déséquilibrés (9) sont en marche, entraînés par l'intermédiaire d'un convertisseur de fréquences à une fréquence réglée en conséquence,
- lors d'une seconde phase, le sable de fonderie (24) versé est compacté à l'aide d'une tête de serrage de contour formée d'un carter de serrage (12), d'une plaque matrice (13) et de plusieurs poinçons de serrage (14) et définissant un plan de serrage commun, et est désaéré, les moteurs déséquilibrés (9) tournant à la même fréquence,
- lors d'une troisième phase, les poinçons de serrage (14) et le châssis du carter de serrage (12) sont enfoncés suivant une pression prédéfinie dans le sable de fonderie (24), la plaque matrice (13) étant immobile et les moteurs déséquilibrés (9) tournant à la même fréquence,
- lors d'une quatrième phase, le sable de fonderie (24) est re-comprimé en présence d'une pression constante sur le châssis du carter de serrage (12) et sur la plaque matrice (13), et d'une pression légèrement augmentée sur les poinçons de serrage (14), les moteurs déséquilibrés (9) tournant à une fréquence réduite,
- et lors d'une cinquième phase, le dos du moule est re-serré par le châssis du carter de serrage (12) et par la plaque matrice (13), en présence d'une lente réduction de pression sur les poinçons de serrage (14), l'unité vibrante étant en appui et les moteurs déséquilibrés (9) tournant à une fréquence encore réduite.
2. Dispositif pour la mise en oeuvre du procédé de compactage de sable de fonderie (4), comportant une table vibrante (1), un châssis de moule (2), un châssis de remplissage (3) recevant l'excédent de sable, une tête de serrage à poinçons multiples (11) formée par un carter de serrage (12) comportant plusieurs poinçons de serrage (14), et une unité vibrante en appui sur des ressorts (7, 8) et équipée de moteurs déséquilibrés (9),
caractérisé en ce que
la tête de serrage à poinçons multiples (11) possède trois unités de serrage indépendantes les unes des autres, et en ce qu'un convertisseur de fréquences réglable en continu est associé aux moteurs déséquilibrés (9).
3. Dispositif selon la revendication 2,
caractérisé en ce que
les trois unités de serrage sont formées par un carter de serrage (12) mobile dans le sens vertical grâce à une unité piston/cylindre extérieure (16), par une plaque matrice (13) montée au niveau des parois internes du carter de serrage (12), mobile parallèlement au sens de déplacement de celui-ci grâce à des unités piston/cylindre intérieures (25), et par les poinçons de serrage (14) montés dans la plaque matrice (13), mobiles parallèlement au sens de déplacement du carter de serrage (12) grâce à des secondes unités piston/cylindre intérieures (26).
4. Dispositif selon la revendication 3,
caractérisé en ce
qu'une conduite d'alimentation séparée (28) prévue vers les poinçons de serrage (14) pour un agent de pression est associée à chaque unité piston/cylindre intérieure (26) individuelle ou à un groupe d'unités piston/cylindre intérieures (26).
5. Procédé selon la revendication 1,
caractérisé en ce que
lors de la troisième phase, des groupes de poinçons de serrage (14) et/ou des poinçons de serrage (14) individuels sont enfoncés alternativement dans le sable de fonderie (24) suivant des forces de pression égales ou différentes.
6. Procédé selon la revendication 1,
caractérisé en ce que
lors de la troisième phase, des groupes de poinçons de serrage (14) et/ou des poinçons de serrage (14) individuels sont enfoncés alternativement dans le sable de fonderie (24) à des profondeurs réglables égales ou différentes.
EP89100932A 1988-02-04 1989-01-20 Procédé et dispositif de compactage de sable de fonderie Expired - Lifetime EP0326870B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89100932T ATE76341T1 (de) 1988-02-04 1989-01-20 Verfahren und vorrichtung zur durchfuehrung des verfahrens zum verdichten von giessereiformsand.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH39688 1988-02-04
CH396/88 1988-02-04

Publications (2)

Publication Number Publication Date
EP0326870A1 EP0326870A1 (fr) 1989-08-09
EP0326870B1 true EP0326870B1 (fr) 1992-05-20

Family

ID=4186062

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89100932A Expired - Lifetime EP0326870B1 (fr) 1988-02-04 1989-01-20 Procédé et dispositif de compactage de sable de fonderie

Country Status (4)

Country Link
EP (1) EP0326870B1 (fr)
AT (1) ATE76341T1 (fr)
DE (1) DE58901439D1 (fr)
ES (1) ES2033024T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108856656A (zh) * 2018-07-18 2018-11-23 安徽宏华铸造有限公司 一种用于电机端盖铸造的砂箱造型设备
CN110744015A (zh) * 2019-11-08 2020-02-04 象山旭雯钢铁科技有限公司 一种砂型铸造模用快速填平装置

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004059554A1 (de) * 2003-12-14 2005-08-11 GEDIB Ingenieurbüro und Innovationsberatung GmbH Einrichtung zum Verdichten von körnigen Formstoffen
CN100464896C (zh) * 2006-06-07 2009-03-04 陈岳海 一种铸造沙模的压模机及应用该机生产铸造沙模的方法
DE102014001515A1 (de) * 2014-02-07 2015-08-13 Schenck Process Gmbh Schwingmaschine
CN108500218A (zh) * 2018-06-14 2018-09-07 临海市微能铸机有限公司 一种多触头压实水平分型全自动无箱造型机
CN109175266A (zh) * 2018-10-09 2019-01-11 禹州市毛吕铸造有限公司 一种砂型铸造压实装置
CN115871081B (zh) * 2022-11-16 2023-09-01 福建群峰机械有限公司 制砖机压头及双层路面砖的制砖工艺

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE271903C (fr) *
US2959828A (en) * 1958-06-30 1960-11-15 Herman Pneumatic Machine Co Foundry mold forming
US2985927A (en) * 1958-10-16 1961-05-30 Herman Pneumatic Machine Co Foundry mold forming apparatus
US3385347A (en) * 1966-01-24 1968-05-28 Osborn Mfg Co Jolt molding machine
AU567107B2 (en) * 1982-11-12 1987-11-12 General Kinematics Corporation Mould for metal casting using vibration and gravity head
CA1221811A (fr) * 1983-02-02 1987-05-19 General Kinematics Corporation Machine a faconner les moules de fonderie

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108856656A (zh) * 2018-07-18 2018-11-23 安徽宏华铸造有限公司 一种用于电机端盖铸造的砂箱造型设备
CN110744015A (zh) * 2019-11-08 2020-02-04 象山旭雯钢铁科技有限公司 一种砂型铸造模用快速填平装置

Also Published As

Publication number Publication date
EP0326870A1 (fr) 1989-08-09
ATE76341T1 (de) 1992-06-15
ES2033024T3 (es) 1993-03-01
DE58901439D1 (de) 1992-06-25

Similar Documents

Publication Publication Date Title
DE2832627A1 (de) Vibrierende ruettelvorrichtung zur betonblockformung
WO2011127928A1 (fr) Dispositif et procédé de fabrication d'éléments moulés en béton et moule destiné à cet effet
EP0326870B1 (fr) Procédé et dispositif de compactage de sable de fonderie
DE102005002497B3 (de) Verfahren und Vorrichtung zum Herstellen von Hohlbausteinen
DE3638207A1 (de) Verfahren zur herstellung von betonfomsteinen und vorrichtung zur durchfuehrung des verfahrens
DE2843598A1 (de) Verfahren und vorrichtung zum verdichten von giessereiformsand
DE2508074B2 (de) Verfahren und Vorrichtung zum Formen von Erzeugnissen aus halbtrockenen, schüttbaren Massen
DE648303C (de) Ruettelformmaschine
DE3004642A1 (de) Werkstoffverdichtungsvorrichtung an betonsteinfertigungsmaschinen
DE2552852C3 (de) Verfahren zum Verdichten von Formkörpern aus Beton o.dgl. plastischen Massen
DE1097622B (de) Verfahren und Vorrichtung zum gleichmaessigen Verdichten des Formsandes in Pressformmaschinen
DE102011054488A1 (de) Vorrichtung und Verfahren zur Herstellung von Betonformsteinen.
DE2453634A1 (de) Verfahren und vorrichtung zum verdichten von formkoerpern aus beton o.dgl. plastischen massen
DE3342314C2 (fr)
DE1963640C3 (de) Rüttelanlage zur Herstellung von Formkörpern durch Verdichtung
DE3048181C2 (de) Vorrichtung zum Herstellen verdichteter Formkörper aus Beton o.dgl.
CH671897A5 (en) Moulding machine for producing sand-filled moulds - in which distribution and compaction of the sand is improved in a vibrating and compression process
DE102004063272A1 (de) Verfahren und Vorrichtung zum Verdichten eines Gemenges
EP1281492A1 (fr) Dispositif de compactage
DE3329585C2 (fr)
EP0285821A2 (fr) Procédé et dispositif de compactage de matériaux de moulage pour moules de fonderie
EP1375098A2 (fr) Méthode et station de remplissage pour obturer de cavités
DE923659C (de) Verfahren und Vorrichtung zum Herstellen von Zuckerstreifen, -platten oder -wuerfeln mittels in Vibration versetzter Pressvorrichtungen
DE10061449A1 (de) Verdichtungseinrichtung zur Verdichtung von aus körniger Masse bestehenden Produktkörpern
DE19601352C2 (de) Vorrichtung zum Verdichten von erdfeuchtem Beton

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

Kind code of ref document: A1

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

17P Request for examination filed

Effective date: 19891216

17Q First examination report despatched

Effective date: 19910807

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 ES FR GB IT LI SE

REF Corresponds to:

Ref document number: 76341

Country of ref document: AT

Date of ref document: 19920615

Kind code of ref document: T

REF Corresponds to:

Ref document number: 58901439

Country of ref document: DE

Date of ref document: 19920625

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: MODIANO & ASSOCIATI S.R.L.

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

Ref country code: GB

Payment date: 19921207

Year of fee payment: 5

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

Ref country code: FR

Payment date: 19921215

Year of fee payment: 5

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

Ref country code: SE

Payment date: 19921216

Year of fee payment: 5

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

Ref country code: DE

Payment date: 19921221

Year of fee payment: 5

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

Ref country code: ES

Payment date: 19930115

Year of fee payment: 5

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

Ref country code: AT

Payment date: 19930121

Year of fee payment: 5

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2033024

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

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

Ref country code: CH

Payment date: 19930416

Year of fee payment: 5

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19940120

Ref country code: AT

Effective date: 19940120

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

Ref country code: SE

Effective date: 19940121

Ref country code: ES

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

Effective date: 19940121

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

Ref country code: LI

Effective date: 19940131

Ref country code: CH

Effective date: 19940131

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19940120

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

Ref country code: FR

Effective date: 19940930

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: 19941001

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 89100932.6

Effective date: 19940810

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 19990201

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050120