EP0144031B1 - Vibrateur pour éliminer des noyaux de moulage - Google Patents

Vibrateur pour éliminer des noyaux de moulage Download PDF

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Publication number
EP0144031B1
EP0144031B1 EP84113922A EP84113922A EP0144031B1 EP 0144031 B1 EP0144031 B1 EP 0144031B1 EP 84113922 A EP84113922 A EP 84113922A EP 84113922 A EP84113922 A EP 84113922A EP 0144031 B1 EP0144031 B1 EP 0144031B1
Authority
EP
European Patent Office
Prior art keywords
casting
support
work support
receiving opening
longitudinal
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
EP84113922A
Other languages
German (de)
English (en)
Other versions
EP0144031A1 (fr
Inventor
Günter Jenzsch
Kurt Rauh
Hans Jürgen Wegscheider
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.)
Mirbeth Rudolf
Original Assignee
Mirbeth Rudolf
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 Mirbeth Rudolf filed Critical Mirbeth Rudolf
Priority to AT84113922T priority Critical patent/ATE32314T1/de
Publication of EP0144031A1 publication Critical patent/EP0144031A1/fr
Application granted granted Critical
Publication of EP0144031B1 publication Critical patent/EP0144031B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
    • B22D29/001—Removing cores
    • B22D29/005—Removing cores by vibrating or hammering
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S241/00—Solid material comminution or disintegration
    • Y10S241/10—Foundry sand treatment

Definitions

  • the invention relates to a device for coring castings by vibration vibrations of the specified in the preamble of claim 1 and by DE patent application Sch 4,896, 31 C; 32 of 10/31/1951 (Fig. 3) and by the type known from the company publication "Wheelabrator-Frye Inc.”, bulletin 130,000 from 1982.
  • the rubber bellows provided on the top and bottom of the casting clamping device are constantly subjected to high abrupt or jerky pressure and tensile loads due to the vibration vibrations introduced into them, which considerably affects their service life; the horizontally provided rubber bellows are also suddenly loaded. The lifespan of the rubber bellows is also reduced by the natural aging of the rubber.
  • the object of the invention is therefore to mount the receiving device of a coring device according to the preamble of claim 1 in the support frame such that it can be deflected completely unhindered in the direction of displacement of the casting, the vibration energy introduced into the receiving device should be used almost exclusively for the coring process , as well as hardly any signs of wear at the bearing points of the receiving device.
  • the casting Due to the freely oscillating mounting of the receiving device in the support frame with simultaneous loose arrangement of a casting in the receiving device and its relocability between two opposing stops within a defined range of motion, the casting is excited to natural vibrations when vibrations are introduced into the receiving device and are directed in its direction of displacement, by which the sand cores in it are dissolved in sand and thus destroyed.
  • An inclined mounting of the receiving device with a casting support formed on the back by individual support ribs has the advantage that the loosened core sand can trickle out of the casting by itself.
  • the loose insertion and removal of the casting into and out of the receiving device is not only quick, convenient and practically safe to do manually, but can also advantageously be carried out easily by a robot.
  • the shape of the receiving opening provided in the receiving device can be adapted in any way to the casting to be cored in each case (feature of claim 2).
  • casters of different sizes can be processed with the same receiving device.
  • a vibration generator equipped with a frequency converter has the advantage that the required number of vibrations can be adapted specifically to the number, size and hardness of the sand cores present in the casting and can thereby be reliably destroyed (feature of patent claim 3).
  • the vibration generators For cores of normal size and hardness, however, the vibration generators generate approx. 3,000 vibrations / min. initiated in the receiving device. Due to the direct attachment of the vibration generator to the receiving device, there are advantageously no wear-prone transmission elements or the like.
  • the device can be surrounded by a sound-absorbing, if necessary easily removable cabin, which carries a sound-absorbing insulating material on its inner wall.
  • the weight of the receiving device should be several times greater than the weight of the casting, the best effect being achieved if it has an approximately 7 to 10 times greater weight than the latter (feature of patent claim 7).
  • the receiving device 11 has an upper support arm 12 and a lower support arm 13, which are connected by two perpendicular, spaced-apart longitudinal arms 14 and 15. The spacing provided between them forms a rectangularly shaped receiving opening 16 which receives the casting a loosely (FIGS. 1 and 3).
  • the receiving opening 16 has a freely accessible loading side e on the front, while a casting support is provided on its rear side, which is formed by a plurality of horizontally running, spaced-apart support ribs 17. These are each attached to the two longitudinal arms 14 and 15. At the lower end of the longitudinal arm 14 there is a support arm 18 which projects into the receiving opening 16 and carries a rubber pad 18 'on its upper side. The casting a inserted into the receiving opening 16 rests on the supporting ribs 17 and the supporting arm 18, the rubber covering 18 'serving for noise insulation during its coring process.
  • the rectangular receiving opening 16 also has, on its perpendicular, broad side formed by the longitudinal arm 15, a baffle plate 19 screwed to the inside thereof, while on the opposite longitudinal arm 14 two spaced apart, equally thick stop bars 20 are screwed tight (Fig. 3); instead of these, a stop plate, not shown, can also be screwed onto the longitudinal arm 14. Between the mutually facing contact sides of the baffle plate 19 and the stop strips 20 a clear width b is formed, the size of which is composed of the respective greatest width a 'of the cast piece a and a defined clearance c (FIG. 3). This is determined empirically and is approximately four times as large as the amplitude at the receiving device 11 caused by the vibration generators 23.
  • the amplitude is the distance from the rest position of the receiving device 11 to its maximum lateral deflection.
  • the defined clearance c is 6 mm.
  • the baffle plate 19 and the stop bars 20 or the stop plate can each be different have large thicknesses which are matched to castings of different widths and are therefore screwed to the receiving device 11, that is to say they are connected to the latter in an exchangeable manner. It is also conceivable that at least one loose intermediate part, not shown, which is matched to the respective casting width and is screwed onto the longitudinal arm 14 and / or 15, is provided. A plurality of reinforcing ribs 24 can also be provided on the outside of the latter.
  • vibration generators 23 are mounted one above the other, the vibrations generated by the latter being directed in the direction of displacement of the casting a between the baffle plate 19 and the stop bars 20 in the directions of the double arrow d.
  • vibration motors are provided as vibration generators 23; it is also conceivable to provide magnetic oscillators or the like for this.
  • the vibration generators 23 can also be assigned at least one frequency converter, not shown. In the present application, approximately 3,000 vibrations / min. introduced into the receiving device 11 at a frequency of 50 Hz.
  • the weight of the receiving device 11 is advantageously about 7 to 10 times the weight of the casting a.
  • the longitudinal arms 14 and 15 of the receiving device 11 and thus the support arm 18 extending at right angles to the longitudinal extension of the longitudinal arms 14, 15 are arranged on the loading side e of the receiving opening 16 at an angle a of approximately 15 ° in such a way that they are inclined to the vertical that the casting a rests with a mere arrangement in the receiving opening 16 only by its own weight on the rear support ribs 17.
  • the screw-type bearings 10 provided on the free ends of the upper and lower support arms 12 and 13 are each mounted at an angle to the longitudinal extension of the support arms 12 and 13.
  • the entire coring device 1 is expediently surrounded by a sound-absorbing cabin (not shown), which can be removed if necessary and carries a sound-absorbing insulating material on its inner walls.
  • the receiving device 11 When the receiving device 11 is in the rest position, the casting a is inserted manually or by a robot into its receiving opening 16 on the loading side e, whereby it rests completely freely between the baffle plate 19 and stop bars 20, merely by its own weight on the supporting ribs 17 and the supporting arm 18 ; no further securing of the casting a is required.
  • the vibration generator 23 After the vibration generator 23 has been started up, the receiving device 11 is displaced by the latter into vibrating vibrating plungers, which are directed in the direction of displacement of the casting a (directions of the double arrow d), as a result of which the receiving device 11 swings freely about 1.5 mm laterally in the supporting frame 2 .
  • the casting a within the defined range c which is to be matched to the respective casting a, with a mere support on the support ribs 17 and the support arm 18 with its own weight between the baffle plate 19 and the stop bars 20 very quickly and loosely back and forth relocated and strikes it abruptly; the casting a is also set in vibration.
  • the resin cores for example resin-bound sand cores, disintegrate into sand. This can then, as shown in FIG.
  • the vibrational vibrations (natural vibrations) introduced into the casting a by the receiving device 11 in the process explained can have a higher frequency than the frequency present on the receiving device 11; the optimum frequency can in each case be set in a targeted manner by means of a frequency converter assigned to the vibration generators 23.
  • the coring time for a casting a of a passenger car engine (cylinder head or the like) by means of the described device is about 3,000 vibrations / min. about 30 to 40 seconds.
  • the casting a is comparatively very carefully and evenly cored by its loose striking on the baffle plate 19 and stop bars 20, d. In other words, crack formation is largely ruled out compared to selective gutting.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Crushing And Grinding (AREA)
  • Casting Devices For Molds (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Vibration Prevention Devices (AREA)

Claims (8)

1. Appareil pour dénoyauter des pièces de fonderie par vibrations, constitué essentiellement d'un bâti (2) et d'au moins un dispositif récepteur (11) tenu par ce bâti, qui reçoit au moins une pièce moulée (a) et qui est monté de manière que ce dispositif récepteur et la pièce moulée puissent être animés de vibrations par au moins un générateur de vibrations (23), ce qui provoque la réduction en sable des noyaux de sable contenus dans la pièce, caractérisé en ce que le dispositif récepteur (11) est suspendu dans le bâti (2) de façon à pouvoir osciller librement comme un pendule et essentiellement dans un seul plan, en supportant la pièce moulée (a) de manière que celle-ci puisse se mouvoir librement et que, pendant l'opération de dénoyautage, elle puisse être déplacée entre des butées mutuellement opposées, dans les limites d'un jeu (c) défini, la pièce étant guidée dans la direction de déplacement (d) et les vibrations du générateur de vibrations (23) étant orientées suivant cette direction.
2. Appareil selon la revendication 1, caractérisé en ce que le dispositif récepteur (11) présente deux bras porteurs horizontaux, l'un supérieur (12) et l'autre infériuer (13), qui sont reliés entre eux par deux bras longitudinaux (14,15) disposés verticalement à distance l'un de l'autre, en définissant une ouverture réceptrice (16) recevant la pièce moulée (a) librement, le côté arrière de cette ouverture présentant un support pour la pièce moulée et les deux bras porteurs était articulés à leurs extrémités libres, chaque fois par l'intermédiare d'une bielle de suspension oscillante (9), à un palier de suspension (7) du bâti (2), réalisé en forme de portique.
3. Appareil selon la revendication 2, caractérisé en ce que deux générateurs de vibrations (23), tels que des moteurs-vibreurs ou des vibreurs électromagnétigues, sont montés l'un au-dessus de l'autre sur un bras longitudinal (14) du dispositif récepteur (11), au moins un convertisseur de fréquence étant coordonné au besoin à ces générateurs de vibrations.
4. Appareil selon la revendication 2, caractérisé en ce que le dispositif récepteur (11) est monté incliné sur la verticale par la disposition oblique adéquate de ses paliers vissés (10), le côté chargement (e), librement accessible, de son ouverture réceptrice (16) étant situé du côté frontal, tandis que le support prévu sur le côté arrière pour la pièce moulée est formé par plusieurs nervures de support (17) fixées horizontalement à distance les unes des autres aux deux bras longitudinaux (14, 15), ainsi que par la prévision d'un bras de support (18) oui fait saillie dans l'ouverture réceptrice, qui est disposé sur l'extrémité inférieure d'au moins un bras longitudinal (14) et dont le dessus porte une garniture de support en caoutchouc (18').
5. Appareil selon la revendication 2, caractérisé en ce qu'une plaque d'impact (19) est disposée sur un bras longitudinal (15), lequel forme un grand côté vertical de l'ouverture réceptrice (16) de forme rectangulaire et que, par contre, deux barres de butée (20) juxtaposées, de même épaisseur, ou une plaque de butée, est ou sont fixée(s) amovible(s), sur le bras longitudinal (14) opposé, la largeur intérieure (b) ainsi définie entre la plaque ou les barres de butée et la plaque d'impact, étant composée de la largeur maximale (a') de la pièce moulée (a) et d'un intervalle (c) défini qui est environ quatre fois plus grand que l'amplitude de vibration produite par les générateurs de vibrations (23) sur le dispositif récepteur (11).
6. Appareil selon la revendication 5, caractérisé en ce que la plaque d'impact (19) et les barres de butée (20), ou la plaque de butée, sont réalisées en plusieurs exemplaires avec des épaisseurs différentes, adaptées à des pièces moulées (a) de différentes largeurs ou que, pour l'adaptation à des pièces moulées de différentes largeurs, on a prévu au moins une pièce intermédiaire ou cale séparée, adaptée à la pièce moulée à traiter, qui peut être fixée amovible à l'un des bras longitudinaux (14, 15) et à laquelle sont fixées amovibles la plaque d'impact ou les barres de butée.
7. Appareil selon les revendications 1 à 4, caractérisé en ce que le poids du dispositif récepteur (11) est un multiple du poids de la pièce moulée (a), correspondant de préférence à environ 7-10 fois le poids de cette pièce.
8. Appareil selon les revendications 2 et 4, caractérisé en ce que le bâti (2), en forme de portique, est composé d'un cadre principal (3) en U et de deux chevalets de support (5) verticaux, qui sont disposés à distance des deux montants verticaux (4) du bâti et dont la hauteur correspond à peu près à un tiers de la hauteur des montants, avec lesquels ils reposent sur un cadre de base (6), les portions terminales libres des montants et des chevalets portant chacune un palier de suspensicn (7) auquel est articulée une bielle oscillante (9) de faible iongueur, dont l'autre extrémité est articulée dans un palier (10) vissé sur le dispositif récepteur (11) avec, interposition, à tous ces points d'attache et d'articulation, de supports de caoutchouc-métal.
EP84113922A 1983-11-19 1984-11-17 Vibrateur pour éliminer des noyaux de moulage Expired EP0144031B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84113922T ATE32314T1 (de) 1983-11-19 1984-11-17 Vorrichtung zum entkernen von gussstuecken durch vibrationsschwingungen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3341894 1983-11-19
DE3341894A DE3341894C1 (de) 1983-11-19 1983-11-19 Vorrichtung zum Entkernen von Gussstuecken durch Vibrationsschwingungen

Publications (2)

Publication Number Publication Date
EP0144031A1 EP0144031A1 (fr) 1985-06-12
EP0144031B1 true EP0144031B1 (fr) 1988-02-03

Family

ID=6214764

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84113922A Expired EP0144031B1 (fr) 1983-11-19 1984-11-17 Vibrateur pour éliminer des noyaux de moulage

Country Status (6)

Country Link
US (1) US4637558A (fr)
EP (1) EP0144031B1 (fr)
JP (1) JPS61500478A (fr)
AT (1) ATE32314T1 (fr)
DE (2) DE3341894C1 (fr)
WO (1) WO1985002137A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH665975A5 (de) * 1985-04-09 1988-06-30 Fischer Ag Georg Einrichtung zum entkernen von gussteilen.
US4722386A (en) * 1987-04-23 1988-02-02 General Kinematics Corporation Casting core shakeout
DE8800960U1 (fr) * 1988-01-27 1989-06-08 "F. U. K." Froelich & Kluepfel Drucklufttechnik Gmbh & Co Kg, 5600 Wuppertal, De
US5042724A (en) * 1989-12-28 1991-08-27 Perry Timothy J Fluorescent tube crusher with particulate separation and recovery
FR2670696B1 (fr) * 1990-12-19 1993-07-02 Peugeot Machine a dessabler.
FR2672525B1 (fr) * 1991-02-07 1994-03-04 Massin Procede et dispositif de debourrage de noyaux de coulee de pieces de fonderie.
ES2142316T3 (es) * 1991-02-07 2000-04-16 Massin Sa Procedimiento y dispositivos de eliminacion de machos de colada de piezas de funcion.
CH687858A5 (de) * 1992-07-01 1997-03-14 Fischer Georg Giessereianlagen Einrichtung zur Regenerierung von Giesserei-Sand.
FR2711931B1 (fr) * 1993-11-05 1996-02-09 Dimafond Dispositif perfectionné de débourrage de noyaux de coulée de pièces de fonderie.
FR2730436B1 (fr) * 1995-02-13 1997-05-09 Peugeot Procede et dispositif pour le dessablage d'une piece de fonderie
AT411971B (de) * 2002-07-26 2004-08-26 Wolfgang Ing Schneebauer Vorrichtung zum entkernen von gussstücken
JP5207377B2 (ja) * 2008-12-18 2013-06-12 Ｕｄトラックス株式会社 切粉除去装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE291439C (fr) *
DE392997C (de) * 1922-06-28 1924-04-02 Rigobert Heusinger Vorrichtung zum Loesen von Kernen aus Metallabguessen
DE1151358B (de) * 1956-12-15 1963-07-11 Buderus Eisenwerk Einrichtung zum selbsttaetigen Ausschlagen von Formsand, Kernsand od. dgl. aus Gussteilen
DE1914734U (de) * 1963-01-19 1965-04-29 Vibra Technik Maschinenfabrik Vorrichtung zum entkernen von gussstuecken, insbesondere von armaturen-gussstuecken.
US3770097A (en) * 1972-02-29 1973-11-06 Gen Kinematics Corp Vibratory conveyor with sound deadening means
US4296794A (en) * 1980-01-14 1981-10-27 Wheelabrator-Frye Inc. Method of transmission of sonic energy to work pieces

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DE-Anm. Sch.4896 (31c, 32) vom 31.10.51 *

Also Published As

Publication number Publication date
EP0144031A1 (fr) 1985-06-12
JPS61500478A (ja) 1986-03-20
JPH051105B2 (fr) 1993-01-07
US4637558A (en) 1987-01-20
WO1985002137A1 (fr) 1985-05-23
ATE32314T1 (de) 1988-02-15
DE3469140D1 (en) 1988-03-10
DE3341894C1 (de) 1985-03-14

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