PL296917A1 - Method of and apparatus for making synthetic resin bonded sand moulds and cores for metal casting purposes - Google Patents
Method of and apparatus for making synthetic resin bonded sand moulds and cores for metal casting purposesInfo
- Publication number
- PL296917A1 PL296917A1 PL29691792A PL29691792A PL296917A1 PL 296917 A1 PL296917 A1 PL 296917A1 PL 29691792 A PL29691792 A PL 29691792A PL 29691792 A PL29691792 A PL 29691792A PL 296917 A1 PL296917 A1 PL 296917A1
- Authority
- PL
- Poland
- Prior art keywords
- hardener
- gas
- core
- hardener gas
- evacuated
- Prior art date
Links
- 238000005058 metal casting Methods 0.000 title abstract 2
- 239000000057 synthetic resin Substances 0.000 title abstract 2
- 229920003002 synthetic resin Polymers 0.000 title abstract 2
- 238000000034 method Methods 0.000 title 1
- 239000004576 sand Substances 0.000 title 1
- 239000004848 polyfunctional curative Substances 0.000 abstract 12
- 239000007789 gas Substances 0.000 abstract 9
- 239000011347 resin Substances 0.000 abstract 3
- 229920005989 resin Polymers 0.000 abstract 3
- 239000011230 binding agent Substances 0.000 abstract 2
- TZIHFWKZFHZASV-UHFFFAOYSA-N methyl formate Chemical compound COC=O TZIHFWKZFHZASV-UHFFFAOYSA-N 0.000 abstract 2
- 239000000203 mixture Substances 0.000 abstract 2
- 239000002912 waste gas Substances 0.000 abstract 2
- 239000012159 carrier gas Substances 0.000 abstract 1
- 238000003912 environmental pollution Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 239000000376 reactant Substances 0.000 abstract 1
- 229920003987 resole Polymers 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 238000005303 weighing Methods 0.000 abstract 1
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)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
A sand core bound with a synthetic resin for metal casting and formed in a core box is hardened by passing a hardener gas through the core. If the hardener gas is a component of a two-component resin, large quantities of hardener gas reactant are required to harden the resin binder. Conventionally, a very large excess of such a hardener gas in a mixture of hardener gas and carrier gas is passed through the sand core in a single pass and must then be removed, at considerable expense, from the waste gas, to prevent environmental pollution. In the invention, on the other hand, only a slight stoichiometric excess of hardener gas is used and therefore the waste gases can be vented directly to atmosphere. To this end, the hardener gas is pumped (12) in several passes through the core boxes (1) in a highly evacuated, closed-circuit line system (1, 11, 15). Before gassing is begun, a vacuum container (15) is evacuated by the pump (12). When air spontaneously enters the vacuum container (15), the core box (1) is evacuated and sucks in the hardener gas as a mixture of hardener gas and air or, preferably, the liquid hardener substance sprayed into an evaporator. In practical series operation of a core shooter for producing sand cores weighing 5 to 22 kg using resol as the resin binder and methyl formate as the hardener, the quantity of excess hardener used was 0 to 70 %.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4112701A DE4112701A1 (en) | 1991-04-18 | 1991-04-18 | METHOD AND DEVICE FOR PRODUCING SAND CORE FOR METAL CASTING |
| PCT/DE1992/000317 WO1992018267A1 (en) | 1991-04-18 | 1992-04-20 | Process and devices for producing sand moulds bound with synthetic resin for metal casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| PL296917A1 true PL296917A1 (en) | 1993-11-02 |
| PL169703B1 PL169703B1 (en) | 1996-08-30 |
Family
ID=6429876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL92296917A PL169703B1 (en) | 1991-04-18 | 1992-04-20 | Method of and apparatus for making synthetic resin bonded sand moulds and cores for metal casting purposes |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0580691B1 (en) |
| JP (1) | JPH0712519B2 (en) |
| AT (1) | ATE120990T1 (en) |
| CZ (1) | CZ218293A3 (en) |
| DE (3) | DE4112701A1 (en) |
| PL (1) | PL169703B1 (en) |
| SK (1) | SK112393A3 (en) |
| WO (1) | WO1992018267A1 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4322950C1 (en) * | 1993-07-09 | 1994-05-05 | Daimler Benz Ag | Hardening artificial resin-bound sand mouldings - using reaction gas, esp. gaseous or vaporous amine as catalyst |
| 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 |
| US5803156A (en) * | 1996-10-07 | 1998-09-08 | Ford Global Technologies, Inc. | Method of making catalyst cured resin-coated sand cores |
| US5971056A (en) * | 1997-05-27 | 1999-10-26 | Luger GmbH | Device for hardening foundry cores and use thereof |
| DE10356634B4 (en) * | 2002-12-05 | 2006-03-30 | Zimmermann, Jürgen, Dr. | Method and apparatus for producing cores in core shooters |
| DE60301855T2 (en) | 2003-03-14 | 2006-06-22 | Fata Aluminium S.P.A. | Method and device for producing cast cores |
| CN102632201A (en) * | 2012-04-10 | 2012-08-15 | 武汉中精金属制品有限公司 | Precision investment casting water glass binder shell CO2 gas hardening technology |
| CN103480802A (en) * | 2013-09-27 | 2014-01-01 | 中核苏阀横店机械有限公司 | Novel sand core with steel plate |
| DE102016123050A1 (en) | 2016-11-29 | 2018-05-30 | HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung | Method for producing cores or molds for metal casting |
| DE102018128605B4 (en) * | 2018-11-14 | 2020-07-30 | Meissner Ag Modell- Und Werkzeugfabrik | Casting tool, for example core shooting tool or mold, and a corresponding casting process |
| CN110899628A (en) * | 2019-12-25 | 2020-03-24 | 银峰铸造（芜湖）有限公司 | Triethylamine method cold box core making method and casting sand core |
| CN113369445A (en) * | 2021-05-12 | 2021-09-10 | 宁波茸发新材料科技有限公司 | Method for solving problem of bubbles at cylinder cover air passage part |
| CZ2021456A3 (en) * | 2021-09-30 | 2023-04-19 | Technická univerzita v Liberci | A mold for casting metal elements and metal products and a method of its production |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA938421A (en) * | 1970-03-25 | 1973-12-18 | Alphaco | Process and system for forming foundry cores and molds |
| DE2620303C3 (en) * | 1975-06-16 | 1980-05-22 | Acme-Cleveland Corp., Cleveland, Ohio (V.St.A.) | Method and device for hardening sand molds or sand cores |
| FR2437894A1 (en) * | 1978-10-02 | 1980-04-30 | Renault | Hardening of foundry sand moulds or cores in boxes - where continuous recirculation of catalyst gas mixt. via compressor greatly reduces consumption of catalyst |
| BR8206406A (en) * | 1982-02-09 | 1983-09-27 | Borden Uk Ltd | PROCESS FOR THE PRODUCTION OF MOLDS AND MALES FOR FOUNDRY |
| EP0128974B1 (en) * | 1983-06-16 | 1986-10-15 | Harald Steffens Giessereimaschinen | Moulding machine for producing moulds or cores from moulding sand |
-
1991
- 1991-04-18 DE DE4112701A patent/DE4112701A1/en not_active Withdrawn
-
1992
- 1992-04-20 JP JP4507954A patent/JPH0712519B2/en not_active Expired - Lifetime
- 1992-04-20 PL PL92296917A patent/PL169703B1/en unknown
- 1992-04-20 DE DE4291170A patent/DE4291170C1/en not_active Expired - Fee Related
- 1992-04-20 DE DE59201923T patent/DE59201923D1/en not_active Expired - Fee Related
- 1992-04-20 CZ CS932182A patent/CZ218293A3/en unknown
- 1992-04-20 SK SK1123-93A patent/SK112393A3/en unknown
- 1992-04-20 AT AT92908814T patent/ATE120990T1/en not_active IP Right Cessation
- 1992-04-20 EP EP92908814A patent/EP0580691B1/en not_active Expired - Lifetime
- 1992-04-20 WO PCT/DE1992/000317 patent/WO1992018267A1/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| ATE120990T1 (en) | 1995-04-15 |
| DE4112701A1 (en) | 1992-10-22 |
| JPH06504234A (en) | 1994-05-19 |
| EP0580691A1 (en) | 1994-02-02 |
| DE4291170C1 (en) | 1995-06-29 |
| SK112393A3 (en) | 1994-03-09 |
| WO1992018267A1 (en) | 1992-10-29 |
| EP0580691B1 (en) | 1995-04-12 |
| CZ218293A3 (en) | 1994-04-13 |
| JPH0712519B2 (en) | 1995-02-15 |
| PL169703B1 (en) | 1996-08-30 |
| DE59201923D1 (en) | 1995-05-18 |
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