EP0650787B1 - Verfahren zum Verdichten von Giessereiformstoff - Google Patents

Verfahren zum Verdichten von Giessereiformstoff Download PDF

Info

Publication number
EP0650787B1
EP0650787B1 EP94116287A EP94116287A EP0650787B1 EP 0650787 B1 EP0650787 B1 EP 0650787B1 EP 94116287 A EP94116287 A EP 94116287A EP 94116287 A EP94116287 A EP 94116287A EP 0650787 B1 EP0650787 B1 EP 0650787B1
Authority
EP
European Patent Office
Prior art keywords
pressure
pressure gradient
compression
process according
sec
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
EP94116287A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0650787A1 (de
Inventor
Kurt Fischer
Hans Riester
Hans Leutwiler
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.)
Georg Fischer Giessereianlagen AG
Original Assignee
Georg Fischer Giessereianlagen AG
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 Georg Fischer Giessereianlagen AG filed Critical Georg Fischer Giessereianlagen AG
Publication of EP0650787A1 publication Critical patent/EP0650787A1/de
Application granted granted Critical
Publication of EP0650787B1 publication Critical patent/EP0650787B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
    • 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

Definitions

  • the present invention relates to a method for compression of foundry molding material, the molding material in a molding device with a model plate with model and arranged on it a form and fill frame is introduced by means of a Pressurized gas, the pressurized gas at least for pre-compression is used.
  • EP-A-0 560 116 describes a method in which a push is divided into two successive areas is, the first area for precompression and the second is used for final compression.
  • the pressure gradient of the the first pressure surge area is smaller than that of the second and the two areas are directly connected.
  • the present Invention the object of proposing a method for Compression of foundry molding material that compacted homogeneously Molds with high hardness even with difficult models with significant differences in height of the model contour or ensures with a small edge distance.
  • a pressure curve according to the invention during the compression process is described and explained in more detail.
  • the pressure in the molding space is low Pressure gradient of approx. 3 bar / sec. elevated.
  • This first printing section merges seamlessly into a much steeper one Pressure section that has a pressure gradient of 30 bar / sec. having.
  • the subsequent printing section leads to final compression and can be e.g. pneumatic mechanical etc. respectively.
  • the first section of the Pressure increase in pre-compression improves fluidization of the filled molding material.
  • the flowability of the sand improves, so that when Subsequent second section of the pressure increase the pre-compression the molding material is improved. Since the two sections connect the pressure increase directly to one another, comes the flowability generated in the first pressure section fully benefit from the compression phase in the second printing section.
  • the molding material is in one in the model plate area State of fluidization. This makes the compaction ability especially in the narrow areas between model parts or Molding box significantly improved so that after compression obtain a significantly increased optimal root strength becomes.
  • the pressure curve according to the invention is therefore particularly for complicated ones Forms particularly suitable with deep bales.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
EP94116287A 1993-10-27 1994-10-15 Verfahren zum Verdichten von Giessereiformstoff Expired - Lifetime EP0650787B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH323693 1993-10-27
CH3236/93 1993-10-27

Publications (2)

Publication Number Publication Date
EP0650787A1 EP0650787A1 (de) 1995-05-03
EP0650787B1 true EP0650787B1 (de) 1998-05-27

Family

ID=4251600

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94116287A Expired - Lifetime EP0650787B1 (de) 1993-10-27 1994-10-15 Verfahren zum Verdichten von Giessereiformstoff

Country Status (11)

Country Link
US (1) US5601777A (ja)
EP (1) EP0650787B1 (ja)
JP (1) JPH07164105A (ja)
KR (1) KR950011003A (ja)
BR (1) BR9404258A (ja)
CZ (1) CZ238594A3 (ja)
DE (1) DE59406076D1 (ja)
DK (1) DK0650787T3 (ja)
ES (1) ES2119044T3 (ja)
HU (1) HUT69252A (ja)
RU (1) RU94039291A (ja)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29925010U1 (de) * 1999-10-26 2008-09-04 Mincelco Gmbh Wasserglasgebundener Kernformstoff
BR0105940A (pt) * 2000-04-13 2002-03-26 Sintokogio Ltd Método e aparelho para compactar areia de moldagem
CN1311935C (zh) * 2000-04-21 2007-04-25 新东工业株式会社 造型装置用模板托架

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH666426A5 (de) * 1984-06-25 1988-07-29 Fischer Ag Georg Formanlage.
CH672270A5 (ja) * 1986-12-17 1989-11-15 Fischer Ag Georg
DE3836876C2 (de) * 1988-10-29 1994-06-09 Badische Maschf Gmbh Verfahren und Vorrichtung zum Verdichten von Gießerei-Formstoff
CH682547A5 (de) * 1990-04-20 1993-10-15 Fischer Ag Georg Verfahren und Vorrichtung zum Verdichten von körnigen Formstoffen.
CH686412A5 (de) * 1992-03-10 1996-03-29 Fischer Georg Giessereianlagen Verfahren zum Verdichten von Formsand fuer Giessformen.

Also Published As

Publication number Publication date
HUT69252A (en) 1995-08-28
HU9403103D0 (en) 1994-12-28
BR9404258A (pt) 1995-07-04
US5601777A (en) 1997-02-11
DK0650787T3 (da) 1999-03-22
CZ238594A3 (en) 1995-08-16
RU94039291A (ru) 1996-08-27
EP0650787A1 (de) 1995-05-03
JPH07164105A (ja) 1995-06-27
KR950011003A (ko) 1995-05-15
ES2119044T3 (es) 1998-10-01
DE59406076D1 (de) 1998-07-02

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