EP0313830A3 - Process for hardening moulding sand articles - Google Patents

Process for hardening moulding sand articles Download PDF

Info

Publication number
EP0313830A3
EP0313830A3 EP88115750A EP88115750A EP0313830A3 EP 0313830 A3 EP0313830 A3 EP 0313830A3 EP 88115750 A EP88115750 A EP 88115750A EP 88115750 A EP88115750 A EP 88115750A EP 0313830 A3 EP0313830 A3 EP 0313830A3
Authority
EP
European Patent Office
Prior art keywords
permeate
membrane
catalyst
passed over
pressure
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.)
Granted
Application number
EP88115750A
Other languages
German (de)
Other versions
EP0313830B1 (en
EP0313830A2 (en
Inventor
Dieter Nisi
Helmut Dr. Paul
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.)
Daimler Benz AG
Original Assignee
Daimler Benz 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 Daimler Benz AG filed Critical Daimler Benz AG
Priority to AT88115750T priority Critical patent/ATE62839T1/en
Publication of EP0313830A2 publication Critical patent/EP0313830A2/en
Publication of EP0313830A3 publication Critical patent/EP0313830A3/en
Application granted granted Critical
Publication of EP0313830B1 publication Critical patent/EP0313830B1/en
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
    • B22C9/12—Treating moulds or cores, e.g. drying, hardening
    • B22C9/123—Gas-hardening

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Mold Materials And Core Materials (AREA)
  • Road Paving Structures (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Catalysts (AREA)

Abstract

A process is described for curing sand moldings, in particular casting cores, by the cold box process. In this process a catalyst containing gas mixture escaping from the mold is passed over a mixture feed side of a semipermeable membrane while a pressure is maintained on the permeate side of the membrane which is less than the pressure on the mixture feed side, whereby the catalyst vapors preferentially permeate through the membrane, and a permeate carrier gas stream which is, in particular, 50 to 300 liters greater than the permeate stream passing through the membrane per m2 and per hour is passed over the permeate side of the membrane. The catalyst, in particular a tertiary amine, is greatly concentrated in the permeate carrier gas stream and can simply and inexpensively be removed from the latter by condensation. Inexpensive, virtually complete recovery of the expensive catalyst is possible using the process.
EP88115750A 1987-10-30 1988-09-24 Process for hardening moulding sand articles Expired - Lifetime EP0313830B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88115750T ATE62839T1 (en) 1987-10-30 1988-09-24 PROCESS FOR HARDENING SAND MOLDINGS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3736775A DE3736775C1 (en) 1987-10-30 1987-10-30 Process for hardening sand moldings
DE3736775 1987-10-30

Publications (3)

Publication Number Publication Date
EP0313830A2 EP0313830A2 (en) 1989-05-03
EP0313830A3 true EP0313830A3 (en) 1989-12-13
EP0313830B1 EP0313830B1 (en) 1991-04-24

Family

ID=6339404

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88115750A Expired - Lifetime EP0313830B1 (en) 1987-10-30 1988-09-24 Process for hardening moulding sand articles

Country Status (6)

Country Link
US (1) US4886105A (en)
EP (1) EP0313830B1 (en)
JP (1) JPH02121750A (en)
AT (1) ATE62839T1 (en)
DE (1) DE3736775C1 (en)
ES (1) ES2022563B3 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4007798C1 (en) * 1990-03-12 1991-02-14 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De Hardening sand mould members - comprises mixing catalyst with carrier gas, mixing with sand, pressing sand, retrieving gas and hardening
US5135043A (en) * 1990-06-25 1992-08-04 Omco Usa, Inc. Apparatus and method for gas curing foundry cores and molds
DE4120928A1 (en) * 1991-06-25 1993-01-07 Unterderweide Gmbh METHOD FOR CURING SAND MOLDED BODIES, IN PARTICULAR FOR FOUNDRIES
DE4206790C1 (en) * 1992-03-04 1993-04-01 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De Hardening resin-bonded foundry sand cores with amine gas catalyst - with recovery of amine gas in sulphuric acid bath and association of amine sulphate by electrodialysis
DE4223776C1 (en) * 1992-07-18 1993-09-16 Mercedes-Benz Aktiengesellschaft, 70327 Stuttgart, De Recycling amine from sand moulding process - by progressively increasing pH of used gases in solution and removing amine by gravity separation
DE4225436C1 (en) * 1992-07-31 1993-11-25 Daimler Benz Ag Catalytic hardening of sand mould elements - with two-stage sepn. and removal of amine(s) and solvents from exhaust air
DE19503832C2 (en) * 1994-02-04 1999-01-28 Sommer Tech Entwicklungen Gmbh Method and device for producing sand cores for metal casting
DE19549422C2 (en) * 1994-02-04 2001-05-10 Sommer Tech Entwicklungen Gmbh Mfg. cores for sand casting
US20040051078A1 (en) * 2002-09-12 2004-03-18 Gernon Michael David Reactive amine catalysts for use in PUCB foundry binder
DE10356634B4 (en) * 2002-12-05 2006-03-30 Zimmermann, Jürgen, Dr. Method and apparatus for producing cores in core shooters
PL1955792T3 (en) 2007-01-22 2019-11-29 Arkema France Process for making foundry shaped cores and for casting metals
KR101488305B1 (en) * 2013-04-23 2015-01-30 현대자동차주식회사 Method and apparatus for recovering hardening catalyst of manufacturing process of core

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2550588B1 (en) * 1975-11-11 1976-07-01 Daimler Benz Ag Method and device for hardening sand mold bodies
DE2621153A1 (en) * 1976-05-13 1977-11-24 Daimler Benz Ag Hardening sand cores by cold box process - where catalyst is reclaimed from carrier gas after use
US4553983A (en) * 1984-07-31 1985-11-19 Membrane Technology And Research, Inc. Process for recovering organic vapors from air

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3104343A1 (en) * 1981-02-07 1982-09-16 Arasin Gmbh, 4223 Voerde METHOD AND DEVICE FOR RECOVERY OF AMINES FROM EXHAUST AIR CONTAINING AMINE
JPS58222A (en) * 1981-06-25 1983-01-05 Matsushita Seiko Co Ltd Gas supply device utilizing gas-selective high-polymer film
US4474586A (en) * 1983-12-05 1984-10-02 Monsanto Company Gas separation process

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2550588B1 (en) * 1975-11-11 1976-07-01 Daimler Benz Ag Method and device for hardening sand mold bodies
DE2621153A1 (en) * 1976-05-13 1977-11-24 Daimler Benz Ag Hardening sand cores by cold box process - where catalyst is reclaimed from carrier gas after use
US4553983A (en) * 1984-07-31 1985-11-19 Membrane Technology And Research, Inc. Process for recovering organic vapors from air

Also Published As

Publication number Publication date
US4886105A (en) 1989-12-12
EP0313830B1 (en) 1991-04-24
JPH02121750A (en) 1990-05-09
ES2022563B3 (en) 1991-12-01
EP0313830A2 (en) 1989-05-03
DE3736775C1 (en) 1988-04-28
ATE62839T1 (en) 1991-05-15

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