WO1982000786A1 - Metal molding process using sand hollow forms - Google Patents
Metal molding process using sand hollow forms Download PDFInfo
- Publication number
- WO1982000786A1 WO1982000786A1 PCT/EP1981/000110 EP8100110W WO8200786A1 WO 1982000786 A1 WO1982000786 A1 WO 1982000786A1 EP 8100110 W EP8100110 W EP 8100110W WO 8200786 A1 WO8200786 A1 WO 8200786A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- casting
- sand
- sand molds
- medium
- quenching
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
Definitions
- the invention relates to a casting process for metals using shell-shaped sand molds consolidated by a chemical reaction, the application of this process to molten iron, and a casting device suitable for carrying out the process.
- the invention seeks to remedy this.
- the invention as characterized in the claims, solves the problem in the solidifying metal form quickly to develop a stable edge shell and to produce a fine-grained structure, in particular in the case of graphitically solidifying iron, the additional volume resulting from the graphite precipitation should be used in an inward-facing manner to compensate for the solidification volume deficit.
- the impregnation of the outer surfaces of the sand shells with a water-repellent substance for example silicone, which means that the shells filled with the metal, e.g. with water or water vapor, can be quenched without quenching liquid can penetrate through the sand bowls (masks) to the iron.
- a water-repellent substance for example silicone
- the quenching of the castings according to the invention also brings about a significant improvement in the mechanical properties.
- the method according to the invention offers cost advantages over die casting since the expensive die casting molds are eliminated.
- the good, die-cast-like, mechanical properties of the castings produced by the process according to the invention are due to the fact that, on the one hand, a rapid-release heat dissipation produces a fine-grained structure, and on the other hand, after cooling, the mixed crystal enriched with alloy additives, depending on the cooling rate, is similar to the die-casting process partly remains in the supersaturated state and thus has a certain hardening ability.
- the masks can be made according to the prior art, e.g. by adding a binder to the sand that hardens.
- a binder e.g., a binder that hardens.
- One such process is the croning process, in which the sand is bound by phenolic resins.
- the wall thickness of the shells is preferably at least 3 mm.
- the shell-shaped molded parts are completed as usual to form the mold, with the impregnation For example, with silicone before assembling, but preferably only after assembling to avoid untreated areas on the contact surface of the shells.
- the sand masks can be sprayed with quenching liquid or vapor or can be completely immersed in a quenching bath.
- Water or water vapor is preferably used as a deterrent.
- the time of adding water depends on the cast metal and the wall thickness of the casting.
- aluminum or very thin-walled cast iron e.g. Connecting rods can have the mold washed with water during casting.
- thick-walled parts e.g. Crankshafts are watered a few seconds after the casting.
- Steel gravel, quartz gravel or quartz sand, as well as other granular masses or solid supports are particularly suitable as support means.
- the quenching liquid itself can also be used as a proppant in a closed container.
- the coolant is removed at a mask temperature of 600 - 700o, the masks glow more or less and disintegrate when unpacking.
- the The mask is removed in a water bath or while spraying with a spray, which has the following advantages:
- a phenol formaldehyde binder develops 20 - 25% methane and 25 - 30% carbon monoxide when heated to casting temperature, which has considerable dangers for humans.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8181902308T DE3166714D1 (en) | 1980-08-29 | 1981-08-04 | Method for quenching sand hollow forms and cast metallic pieces, application of that method and apparatus for carrying out that method |
BR8108968A BR8108968A (en) | 1980-08-29 | 1981-08-04 | FOUNDRY PROCESS FOR METALS WITH APPLICATION OF SAND MOLDS IN SHAPE SHAPE |
NO821408A NO159248C (en) | 1980-08-29 | 1982-04-28 | PROCEDURE FOR AA TO GET QUICK COOLING OF COLD FOLDING FORMS. |
DK190882A DK190882A (en) | 1980-08-29 | 1982-04-28 | METAL PROCEDURE FOR METALS USING SCALFORMED SOCIETIES |
FI823324A FI69412C (en) | 1980-08-29 | 1982-09-28 | FOERFARANDE FOER SNABB AVKYLNING AV METALLGJUTSTYCKEN |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH6513/80800829 | 1980-08-29 | ||
CH6513/80A CH650430A5 (en) | 1980-08-29 | 1980-08-29 | Method for casting of metals by phenolic bound sand shapes. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1982000786A1 true WO1982000786A1 (en) | 1982-03-18 |
Family
ID=4310798
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1981/000110 WO1982000786A1 (en) | 1980-08-29 | 1981-08-04 | Metal molding process using sand hollow forms |
Country Status (11)
Country | Link |
---|---|
EP (1) | EP0058180B1 (en) |
JP (1) | JPS57501828A (en) |
BE (1) | BE890139A (en) |
BR (1) | BR8108968A (en) |
CA (1) | CA1165967A (en) |
CH (1) | CH650430A5 (en) |
DK (1) | DK190882A (en) |
FI (1) | FI69412C (en) |
IT (1) | IT1138537B (en) |
PT (1) | PT73559B (en) |
WO (1) | WO1982000786A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0348248A1 (en) * | 1988-06-24 | 1989-12-27 | Automobiles Peugeot | Mould for manufacturing a metallic piece, utilization of this mould and method for correspondent moulding |
FR2680125A1 (en) * | 1991-08-09 | 1993-02-12 | Peugeot | Method and device for moulding in a shell mould with a cooled rigid permanent mould |
DE10357618A1 (en) * | 2003-12-10 | 2005-07-14 | Hydro Aluminium Deutschland Gmbh | Method for producing a casting from a molten metal |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3034332A1 (en) * | 2015-04-01 | 2016-10-07 | Saint Jean Ind | PROCESS FOR SANDING CARAPLE MOLDING FOR THE PRODUCTION OF A PART IN THE AUTOMOTIVE AND AERONAUTICS FIELD |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE734046C (en) * | 1941-05-20 | 1943-04-07 | Heinrich Lanz Ag | Process to prevent the penetration of moisture from the filler sand into the model sand layer in casting molds |
FR1039893A (en) * | 1950-08-04 | 1953-10-12 | Ford | Method and apparatus for heat treatments, such as quenching castings |
US2968848A (en) * | 1959-01-02 | 1961-01-24 | Richard T Carter | Method of casting refractory shells |
US2985929A (en) * | 1959-12-18 | 1961-05-30 | Richard T Carter | Method and apparatus for support and cooling of shell molds |
FR1351085A (en) * | 1963-03-12 | 1964-01-31 | Foundry mold | |
DE1241051B (en) * | 1961-08-12 | 1967-05-24 | Deutsche Edelstahlwerke Ag | Device for casting metallic workpieces |
US3404724A (en) * | 1966-02-01 | 1968-10-08 | Amsted Ind Inc | Method of casting in a shell molding |
US3409069A (en) * | 1966-02-01 | 1968-11-05 | Amsted Ind Inc | Method of casting steel in a shell mold |
DE2806995A1 (en) * | 1978-02-18 | 1979-08-30 | Avesta Jernverks Ab | Pouring metal without turbulence into thin walled mould - gradually lowered into cooling bath during casting from horizontal into vertical position (SW 22.5.78) |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5638565Y2 (en) * | 1977-08-06 | 1981-09-09 |
-
1980
- 1980-08-29 CH CH6513/80A patent/CH650430A5/en not_active IP Right Cessation
-
1981
- 1981-08-04 JP JP56502615A patent/JPS57501828A/ja active Pending
- 1981-08-04 WO PCT/EP1981/000110 patent/WO1982000786A1/en active IP Right Grant
- 1981-08-04 BR BR8108968A patent/BR8108968A/en unknown
- 1981-08-04 EP EP81902308A patent/EP0058180B1/en not_active Expired
- 1981-08-24 PT PT73559A patent/PT73559B/en unknown
- 1981-08-28 BE BE0/205805A patent/BE890139A/en not_active IP Right Cessation
- 1981-08-28 CA CA000384792A patent/CA1165967A/en not_active Expired
- 1981-08-28 IT IT23692/81A patent/IT1138537B/en active
-
1982
- 1982-04-28 DK DK190882A patent/DK190882A/en not_active Application Discontinuation
- 1982-09-28 FI FI823324A patent/FI69412C/en not_active IP Right Cessation
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE734046C (en) * | 1941-05-20 | 1943-04-07 | Heinrich Lanz Ag | Process to prevent the penetration of moisture from the filler sand into the model sand layer in casting molds |
FR1039893A (en) * | 1950-08-04 | 1953-10-12 | Ford | Method and apparatus for heat treatments, such as quenching castings |
US2968848A (en) * | 1959-01-02 | 1961-01-24 | Richard T Carter | Method of casting refractory shells |
US2985929A (en) * | 1959-12-18 | 1961-05-30 | Richard T Carter | Method and apparatus for support and cooling of shell molds |
DE1241051B (en) * | 1961-08-12 | 1967-05-24 | Deutsche Edelstahlwerke Ag | Device for casting metallic workpieces |
FR1351085A (en) * | 1963-03-12 | 1964-01-31 | Foundry mold | |
US3404724A (en) * | 1966-02-01 | 1968-10-08 | Amsted Ind Inc | Method of casting in a shell molding |
US3409069A (en) * | 1966-02-01 | 1968-11-05 | Amsted Ind Inc | Method of casting steel in a shell mold |
DE2806995A1 (en) * | 1978-02-18 | 1979-08-30 | Avesta Jernverks Ab | Pouring metal without turbulence into thin walled mould - gradually lowered into cooling bath during casting from horizontal into vertical position (SW 22.5.78) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0348248A1 (en) * | 1988-06-24 | 1989-12-27 | Automobiles Peugeot | Mould for manufacturing a metallic piece, utilization of this mould and method for correspondent moulding |
FR2633206A1 (en) * | 1988-06-24 | 1989-12-29 | Peugeot | MOLD FOR THE MANUFACTURE OF A METAL PART, USE OF THIS MOLD AND CORRESPONDING MOLDING METHOD |
FR2680125A1 (en) * | 1991-08-09 | 1993-02-12 | Peugeot | Method and device for moulding in a shell mould with a cooled rigid permanent mould |
DE10357618A1 (en) * | 2003-12-10 | 2005-07-14 | Hydro Aluminium Deutschland Gmbh | Method for producing a casting from a molten metal |
DE10357618B4 (en) * | 2003-12-10 | 2008-01-24 | Bender, Wilfried, Dr. | Method for producing a casting from a molten metal |
Also Published As
Publication number | Publication date |
---|---|
BE890139A (en) | 1981-12-16 |
FI69412B (en) | 1985-10-31 |
JPS57501828A (en) | 1982-10-14 |
DK190882A (en) | 1982-04-28 |
PT73559B (en) | 1983-01-17 |
FI823324A0 (en) | 1982-09-28 |
EP0058180B1 (en) | 1984-10-17 |
IT8123692A0 (en) | 1981-08-28 |
FI823324L (en) | 1982-09-28 |
FI69412C (en) | 1986-02-10 |
CA1165967A (en) | 1984-04-24 |
BR8108968A (en) | 1983-01-11 |
PT73559A (en) | 1981-09-01 |
CH650430A5 (en) | 1985-07-31 |
IT1138537B (en) | 1986-09-17 |
EP0058180A1 (en) | 1982-08-25 |
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