EP0096045A1 - Verfahren zur herstellung von abformungen mit formsand oder einem sonstigen gemisch aus grundstoffteilchen - Google Patents
Verfahren zur herstellung von abformungen mit formsand oder einem sonstigen gemisch aus grundstoffteilchenInfo
- Publication number
- EP0096045A1 EP0096045A1 EP82903449A EP82903449A EP0096045A1 EP 0096045 A1 EP0096045 A1 EP 0096045A1 EP 82903449 A EP82903449 A EP 82903449A EP 82903449 A EP82903449 A EP 82903449A EP 0096045 A1 EP0096045 A1 EP 0096045A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- ata
- mixture
- material particles
- seconds
- 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.)
- Withdrawn
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 13
- 239000002245 particle Substances 0.000 title claims abstract description 12
- 239000002994 raw material Substances 0.000 title claims abstract 3
- 238000000034 method Methods 0.000 title claims description 19
- 238000004519 manufacturing process Methods 0.000 title abstract description 4
- 239000004576 sand Substances 0.000 title description 6
- 238000005266 casting Methods 0.000 title 2
- 239000003110 molding sand Substances 0.000 claims abstract description 5
- 239000000654 additive Substances 0.000 claims abstract description 3
- 239000011230 binding agent Substances 0.000 claims abstract description 3
- 238000000465 moulding Methods 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 6
- 235000012239 silicon dioxide Nutrition 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 239000002360 explosive Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract 1
- 238000000280 densification Methods 0.000 abstract 1
- 238000005457 optimization Methods 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
Definitions
- the present invention relates to a method for producing impressions with molding sand or another deformable mixture of base material particles, binder, water and optionally additives by means of a pressure surge in a closed space.
- a number of processes are known which bring about the production of shaped bodies by means of a pressure surge.
- a deformable mixture e.g. Molding sand built up a gas pressure and then dismantled again.
- the invention has for its object to select an area of the pressure curve within which an optimal compression of the deformable mixture is ensured.
- This area is characterized in that the deformable mixture is applied using a pressure increase gradient exposed to a gas pressure of at least 2 ata of at least 50 ata / s, maintains this minimum pressure for at least 0.01 seconds and reduces to normal pressure within at least 0.2 seconds since the beginning of the pressure increase.
- the pressure surge generated should be brought to the sand surface with a low final pressure as a mass flow by changing the amount of air per unit of time and then brought to normal pressure.
- a pressure maximum of 4 to 5.5 ata in the combustion chamber represents an optimum between the desired strength values of the sand molds and the sealing effort of the combustion chamber.
- the speed of propagation for elastic longitudinal waves of such particles was determined with respect to the selection of the base material particles, a value of 4 to 7 km / s, preferably that of 5.8 to 6.0 km / seconds, proving to be particularly favorable.
- Base particles with a majority silicon dioxide content were used for the experiments, the compressibility being 27 to 60%, preferably 32 to 45%.
- the described method is preferably used for the precise molding of models, the optimal values determined being set and combined in such a way that a pressure of 80 to 180 N / cm 2 preferably arises on the model surface.
- the limit values determined in this way for the pressure increase, for the maximum value and for the pressure reduction indicate values for optimal operation of a sand compacting system.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Devices For Molds (AREA)
- Mold Materials And Core Materials (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19813149172 DE3149172A1 (de) | 1981-12-11 | 1981-12-11 | "verfahren zur herstellung von formkoerpern mittels gasdruck" |
| DE3149172 | 1981-12-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0096045A1 true EP0096045A1 (de) | 1983-12-21 |
Family
ID=6148519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP82903449A Withdrawn EP0096045A1 (de) | 1981-12-11 | 1982-12-09 | Verfahren zur herstellung von abformungen mit formsand oder einem sonstigen gemisch aus grundstoffteilchen |
Country Status (11)
| Country | Link |
|---|---|
| US (2) | US4546810A (da) |
| EP (1) | EP0096045A1 (da) |
| JP (1) | JPS58502090A (da) |
| AU (1) | AU1013183A (da) |
| CA (1) | CA1217620A (da) |
| DD (1) | DD208311B5 (da) |
| DE (1) | DE3149172A1 (da) |
| DK (1) | DK364983D0 (da) |
| IT (1) | IT1191115B (da) |
| WO (1) | WO1983002078A1 (da) |
| ZA (1) | ZA829066B (da) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3344520A1 (de) * | 1983-12-09 | 1985-06-20 | BMD Badische Maschinenfabrik Durlach GmbH, 7500 Karlsruhe | Vorrichtung zum verdichten von giesserei-formstoff mittels druckgas |
| CH666636A5 (de) * | 1984-01-09 | 1988-08-15 | Fischer Ag Georg | Verfahren zum verdichten von koernigen formstoffen. |
| CH672270A5 (da) * | 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 |
| US5136497A (en) * | 1990-07-12 | 1992-08-04 | Bdm International, Inc. | Material consolidation modeling and control system |
| US5202837A (en) * | 1990-07-12 | 1993-04-13 | Coe Carlos J | Material consolidation modeling and control system |
| CH686412A5 (de) * | 1992-03-10 | 1996-03-29 | Fischer Georg Giessereianlagen | Verfahren zum Verdichten von Formsand fuer Giessformen. |
| KR100946318B1 (ko) | 2000-10-11 | 2010-03-09 | 유나이티드 비디오 프로퍼티즈, 인크. | 데이터의 기억 장치를 주문형 매체 배달 시스템의 서버에제공하기 위한 시스템 및 방법 |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2847736A (en) * | 1954-12-31 | 1958-08-19 | Pulvermacher Dietrich | Device for making sand molds for metal casting |
| US3170202A (en) * | 1962-08-22 | 1965-02-23 | Sr William J Huston | Foundry process |
| DE1961234C3 (de) * | 1969-12-05 | 1975-02-06 | Kramatorskij Nautschno-Issledowatel' Skij I Projektno-Technologitscheskij Institut Maschinostrojenija, Kramatorsk (Sowjetunion) | Verfahren und Vorrichtung zum Verdichten von GieBereiformmassen |
| DE2128371A1 (de) * | 1971-06-08 | 1972-12-28 | Dynamit Nobel Ag, 5210 Troisdorf | Verfahren zum Verdichten von körnigen Materialien durch Explosionsdruck |
| DE2249244A1 (de) * | 1972-10-07 | 1974-04-11 | Buderus Eisenwerk | Verfahren zum gleichzeitigen verdichten und aushaerten von haertbaren formstoffen |
| JPS55147462A (en) * | 1979-05-08 | 1980-11-17 | Sintokogio Ltd | Molding method of lower mold and squeeze plate device |
| DE2844464C2 (de) * | 1978-10-12 | 1983-03-24 | Bühler, Eugen, Dipl.-Ing., 8871 Burtenbach | Verfahren und Vorrichtung zum Verdichten von Gießformen |
| AT381877B (de) * | 1978-12-15 | 1986-12-10 | Fischer Ag Georg | Verfahren und vorrichtung zum verdichten von koernigen stoffen, insbesondere giessereiformstoff |
| CH637044A5 (de) * | 1979-02-02 | 1983-07-15 | Fischer Ag Georg | Verfahren zum verdichten von formsand in einer formvorrichtung. |
| CH640757A5 (de) * | 1979-04-04 | 1984-01-31 | Fischer Ag Georg | Verfahren und einrichtung zum verdichten von formstoffen. |
| JPS55133847A (en) * | 1979-04-05 | 1980-10-18 | Sintokogio Ltd | Molding method of mold and device thereof |
| JPS55136543A (en) * | 1979-04-11 | 1980-10-24 | Sintokogio Ltd | Cover device of mold molding machine |
| JPS55141355A (en) * | 1979-04-19 | 1980-11-05 | Sintokogio Ltd | Mold molding method and its device |
| CH648498A5 (de) * | 1980-11-06 | 1985-03-29 | Fischer Ag Georg | Verfahren zum verdichten von koernigen stoffen, insbesondere giessereiformstoffen. |
| WO1982003348A1 (fr) * | 1981-04-02 | 1982-10-14 | Koebel Alfons | Procede et dispositif de compactage pneumatique de sable de moulage |
-
1981
- 1981-12-11 DE DE19813149172 patent/DE3149172A1/de not_active Ceased
-
1982
- 1982-12-06 IT IT24627/82A patent/IT1191115B/it active
- 1982-12-08 DD DD24571082A patent/DD208311B5/de not_active IP Right Cessation
- 1982-12-09 WO PCT/CH1982/000131 patent/WO1983002078A1/de not_active Ceased
- 1982-12-09 US US06/531,827 patent/US4546810A/en not_active Ceased
- 1982-12-09 US US06/880,721 patent/USRE32622E/en not_active Expired - Fee Related
- 1982-12-09 JP JP82503576A patent/JPS58502090A/ja active Pending
- 1982-12-09 ZA ZA829066A patent/ZA829066B/xx unknown
- 1982-12-09 AU AU10131/83A patent/AU1013183A/en not_active Abandoned
- 1982-12-09 EP EP82903449A patent/EP0096045A1/de not_active Withdrawn
- 1982-12-10 CA CA000417439A patent/CA1217620A/en not_active Expired
-
1983
- 1983-08-10 DK DK3649/83A patent/DK364983D0/da not_active Application Discontinuation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO8302078A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| IT8224627A1 (it) | 1984-06-06 |
| IT1191115B (it) | 1988-02-24 |
| US4546810A (en) | 1985-10-15 |
| AU1013183A (en) | 1983-06-30 |
| DK364983A (da) | 1983-08-10 |
| CA1217620A (en) | 1987-02-10 |
| IT8224627A0 (it) | 1982-12-06 |
| DE3149172A1 (de) | 1983-06-30 |
| USRE32622E (en) | 1988-03-15 |
| ZA829066B (en) | 1983-09-28 |
| WO1983002078A1 (fr) | 1983-06-23 |
| DK364983D0 (da) | 1983-08-10 |
| DD208311B5 (de) | 1994-08-25 |
| DD208311A5 (de) | 1984-05-02 |
| JPS58502090A (ja) | 1983-12-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB LI LU NL SE |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19840227 |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: LANDOLT, CHRISTOPH |