EP0370966B2 - Vorrichtung zur Verdichtung vom Formsand in Formkästen mit Druckluftimpulsen - Google Patents

Vorrichtung zur Verdichtung vom Formsand in Formkästen mit Druckluftimpulsen Download PDF

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Publication number
EP0370966B2
EP0370966B2 EP89830486A EP89830486A EP0370966B2 EP 0370966 B2 EP0370966 B2 EP 0370966B2 EP 89830486 A EP89830486 A EP 89830486A EP 89830486 A EP89830486 A EP 89830486A EP 0370966 B2 EP0370966 B2 EP 0370966B2
Authority
EP
European Patent Office
Prior art keywords
sand
frame
moulding
air
annular chamber
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
EP89830486A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0370966A3 (de
EP0370966B1 (de
EP0370966A2 (de
Inventor
Gian Luigi Cobelli
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.)
STERN GIESSEREI-ANLAGE GmbH
Original Assignee
STERN GIESSEREI-ANLAGE 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
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Application filed by STERN GIESSEREI-ANLAGE GmbH filed Critical STERN GIESSEREI-ANLAGE GmbH
Priority to AT89830486T priority Critical patent/ATE94789T1/de
Publication of EP0370966A2 publication Critical patent/EP0370966A2/de
Publication of EP0370966A3 publication Critical patent/EP0370966A3/de
Application granted granted Critical
Publication of EP0370966B1 publication Critical patent/EP0370966B1/de
Publication of EP0370966B2 publication Critical patent/EP0370966B2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • 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
    • 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 device for compacting molding sand in molding boxes according to the preamble of claim 1.
  • the molding sand in molding boxes can be compacted in various ways, namely mechanically by shaking and pressing using a multi-ram system, the rams resting on the sand; pneumatically directly with air impulses and with combined systems, whereby a device of the sand is provided by air impulses and a final compression with a multi-stamp system.
  • a device for compacting the molding sand with the aid of air pulses is known.
  • This device is provided with a model plate and a molding box arranged thereon, a frame located above for filling the sand into the molding box and with a compressed air system with nozzles and valves for compressing the molding sand.
  • the invention is therefore based on the object of designing the device of the generic type in such a way that it allows both compression using only air pulses and pre-compression using air pulses and mechanical final compression using a multi-piston system.
  • the invention is based on the idea of arranging the necessary parts of the device in such a way that the various compression options can be achieved in a simple manner simply by covering the device with a top cover. This is advantageously done in that the cover is formed either by a simple cover plate or by a multi-die system of the molding machine.
  • the device does not occupy the space above the box and is not a hindrance when filling the sand into the box and during the normal movements of the molding machine.
  • the device can thus remain unchanged in the same position and be switched off at any time from the operating cycle of the molding machine without intervention on it.
  • the device according to the invention can be used as needed or can remain unused without the need to move the device and without impeding the function of the molding machine.
  • the device can be attached directly to the hollow box section as well as to the frame for filling the sand and to a conventional molding machine. In operation of the device, in which the compressed air pulses are used for pre-compression and the final compression takes place via the multi-piston system, an optimal adaptation to difficult shapes is advantageously achieved.
  • a molding table 10 of a molding machine is equipped with a model plate carrier 11 on which a model plate 12 rests. These parts are contained in a molding box 13, into which the molding sand 14 is filled via a frame 15 which is arranged above the box 13 and rests thereon.
  • a multi-stamp system 16 is arranged above the frame 15, which rests firmly on the frame 15 and delimits a space 17 above the sand 14 in the box 13.
  • a compressed air system 18 is provided at the level of the frame 15, which serves as a metering frame, for compressing the sand 14 located in the molding box 13.
  • This compressed air system 18 comprises an annular body 19 which delimits a corresponding annular chamber 20 into which the compressed air supplied via a line 21 is directed.
  • the ring body 19 can be attached to the frame 15 as well as form a unit with the frame 15, as shown in the drawing. Instead, the ring body 19 can also be on the molding box 13 or be mounted on the multi-punch system 16 or within the molding machine.
  • the annular chamber 20 is connected to the space 17 formed between the surface of the molding sand 14 and the multi-die system 16 via a series of valves 22 and nozzles 23, which are distributed over the entire inner circumference of the annular body 19.
  • valves 22 are controlled so that they generate compressed air pulses which are directed from the annular chamber 20 to the space 17.
  • the nozzles 23 are partially aligned horizontally to generate horizontally extending air pulses above the molding sand 14, and they are partially aligned obliquely from bottom to top at different degrees of angle to generate air pulses that are applied to the multi-die system 16 or a cover plate, not shown are directed, each serving as a deflection device and redirecting the air pulses to the sand 14.
  • the air impulses coming from the sides generate a sufficiently high pressure in the space 17 in order to achieve a partial or complete compaction of the sand 14 to the desired extent, the compaction being able to be completed with the multi-stamp system 16.
  • Vent passages or openings can be provided between the contact surfaces of the multi-stamp system 16 and the frame 15 or another part of the system, which open and close during operation of the system and thus allow the compressed air to escape and the room 17 to be decompressed after the system has been used .
  • a simple cover plate can be provided for the upper part of the space 17 in order to hold and distribute the compressed air in the molding box 13 during the compression of the sand 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP89830486A 1988-11-21 1989-11-07 Vorrichtung zur Verdichtung vom Formsand in Formkästen mit Druckluftimpulsen Expired - Lifetime EP0370966B2 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89830486T ATE94789T1 (de) 1988-11-21 1989-11-07 Vorrichtung zur verdichtung vom formsand in formkaesten mit druckluftimpulsen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT523988 1988-11-21
IT8805239A IT1225165B (it) 1988-11-21 1988-11-21 Apparecchiatura per la compressione della terra di formatura nelle staffe di fonderia mediante impulsi di aria compressa.

Publications (4)

Publication Number Publication Date
EP0370966A2 EP0370966A2 (de) 1990-05-30
EP0370966A3 EP0370966A3 (de) 1991-01-23
EP0370966B1 EP0370966B1 (de) 1993-09-22
EP0370966B2 true EP0370966B2 (de) 1996-06-26

Family

ID=11119816

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89830486A Expired - Lifetime EP0370966B2 (de) 1988-11-21 1989-11-07 Vorrichtung zur Verdichtung vom Formsand in Formkästen mit Druckluftimpulsen

Country Status (6)

Country Link
EP (1) EP0370966B2 (ja)
JP (1) JPH02224847A (ja)
AT (1) ATE94789T1 (ja)
DE (1) DE58905682D1 (ja)
ES (1) ES2045554T3 (ja)
IT (1) IT1225165B (ja)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4114362A1 (de) * 1991-05-02 1992-11-05 Wagner Heinrich Sinto Masch Verfahren zum herstellen einer sandform
ES2048635B1 (es) * 1991-10-30 1996-07-01 Erana Agustin Arana Cabezal para maquinas de moldeo de cajas de arena por impacto de aire.
EP0849017B1 (en) * 1996-12-17 2001-10-04 Loramendi, S.A. Improved sand mould air impact or blast compacting machine
JP4560799B2 (ja) * 2006-08-07 2010-10-13 マツダ株式会社 鋳型造型方法及びその装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT381877B (de) * 1978-12-15 1986-12-10 Fischer Ag Georg Verfahren und vorrichtung zum verdichten von koernigen stoffen, insbesondere giessereiformstoff
EP0036434A1 (de) * 1980-03-25 1981-09-30 Eugen Dipl.-Ing. Bühler Verfahren und Vorrichtung zum Verdichten von Giessformen
SU1031635A1 (ru) * 1982-01-04 1983-07-30 Краматорский Научно-Исследовательский И Проектно-Конструкторский Технологический Институт По Адъюстажному И Прецизионному Прокатному Оборудованию Формовочна машина
SU1061912A1 (ru) * 1982-08-05 1983-12-23 Краматорский Научно-Исследовательский И Проектно-Технологический Институт Машиностроения Формовочна машина
DE3511283A1 (de) * 1985-03-28 1986-10-09 Dietmar Prof. Dr.-Ing. 5100 Aachen Boenisch Verfahren und vorrichtung zum verdichten von giessereiformstoffen
DE8606530U1 (de) * 1986-03-10 1986-04-24 Buderus Ag, 6330 Wetzlar Vorrichtung zum Herstellen von Gießformen

Also Published As

Publication number Publication date
JPH02224847A (ja) 1990-09-06
IT8805239A0 (it) 1988-11-21
IT1225165B (it) 1990-11-02
EP0370966A3 (de) 1991-01-23
DE58905682D1 (de) 1993-10-28
ES2045554T3 (es) 1994-01-16
ATE94789T1 (de) 1993-10-15
EP0370966B1 (de) 1993-09-22
EP0370966A2 (de) 1990-05-30

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