EP0002050B1 - Procédé et dispositif pour refroidir, sécher et séparer dans un tambour les pièces coulées et le sable de moulage - Google Patents
Procédé et dispositif pour refroidir, sécher et séparer dans un tambour les pièces coulées et le sable de moulage Download PDFInfo
- Publication number
- EP0002050B1 EP0002050B1 EP19780101366 EP78101366A EP0002050B1 EP 0002050 B1 EP0002050 B1 EP 0002050B1 EP 19780101366 EP19780101366 EP 19780101366 EP 78101366 A EP78101366 A EP 78101366A EP 0002050 B1 EP0002050 B1 EP 0002050B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chamber
- cooling drum
- sand
- drum
- cooling
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D31/00—Cutting-off surplus material, e.g. gates; Cleaning and working on castings
- B22D31/002—Cleaning, working on castings
- B22D31/007—Tumbling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/08—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by sprinkling, cooling, or drying
- B22C5/085—Cooling or drying the sand together with the castings
Definitions
- cooling drums in which hot castings and molding sand are entered on one side, which then circulate through the cooling drum and emerge on the other side, being separated shortly beforehand by sieving.
- Sand and castings are cooled by evaporating water, which is extracted from the sand or additionally added (see, for example, DE-A-2 607 265).
- Such a cooling drum is known from FR-A-2 167308, the partially perforated drum casing of which is surrounded by a wall which forms a first chamber which is connected to a stationary suction draft.
- the wall forming the first chamber in turn has a partially perforated area, which acts as a sieve grate and is surrounded by a solid housing, under the bunker-like lower part of which there is sand extraction, and which has a collecting chamber on the side for sieve residues from the first chamber.
- the molding sand is collected from the perforated part of the cooling drum in a rotating chamber that surrounds the cooling drum, sucked through a further perforated partition wall through an air stream coming from the cooling drum, separated there by gravity from the air stream and at the deepest Place of this second chamber.
- the sand in the front half of the cooling drum is largely dried, if possible, in order to bring hard-baked tubers to decay here.
- the unwanted dust content in the molding sand which consists of burnt binder, splintered fine grain, etc., is discharged and fed to a rod separator.
- a rotatable cooling drum (1) is surrounded on its end part, which is provided with through openings (11) for molding sand (9), by a first chamber (2) and a second chamber (3).
- the cooling drum expediently contains water nozzles (16) in this area, the function of which is advantageously measured as a function of inside the drum and / or chamber NEN respective operating states is controlled by a computing and control device.
- the inner wall of the drum can be provided with carrier bars (14) for castings and molding sand, which also make it possible to convey them against gravity.
- the wall parts of the first chamber (2) can be fixed or slidably connected to the outer wall of the cooling drum (1), so that this first chamber (2) can be driven both rigidly with the cooling drum (1) and independently of its speed and direction of rotation .
- the second chamber (3) is stationary and sealed by means of sealing elements (4) against the rotatable cooling drum (1) and the rotating wall parts of the first chamber (2). In the upper area, the second chamber (3) opens into the air suction nozzle (5) of a suction device.
- the lower part of the second chamber (3) is designed as a collecting container for dried and cooled sand and is closed by a flap (6) by a spring or a counterweight (7), the force of which is in a certain ratio to the downward weight of the outflowing sand stands, is pushed up.
- a transport device (not shown), for example a conveyor belt, is provided below the flap (6).
- the wall between the first chamber (2) and the second chamber (3) is at least partially perforated and provided with through openings (8) for the sand (9) circulating in the rotating first chamber (2).
- a door (10) (FIG. 1) is also provided in order to completely empty the first chamber (2) if necessary.
- the wall between the first chamber (2) and the second chamber (3) consists of a polygon sieve which is formed in the shape of a truncated pyramid and the inner wall of which is provided with guide plates (12).
- the guide plates (12) are alternately radial and secant-shaped. arranged on the inner wall of the truncated pyramid.
- the truncated pyramid has a section of imperforate sheet surrounding the area of the cooling drum (1) provided with through openings (11), which is followed by a screen section surrounding the unperforated wall area of the cooling drum, the guide plates (12) are connected to one another at the junction of the jacket sections by sheet metal webs (15) and form peripheral sand pockets (cf. FIG. 111).
- the lower base-side end of the polygon screen is expediently widened somewhat.
- the sand tubers and metal residues that do not fit through the narrow through openings (8) of the sieve roll into this extension. From there they are continuously discharged into a stationary collecting chamber (13), which is closed at the lower end by means of a flap (6) already described and sealed against the rotating wall parts. It is also possible to enter grinding media in the stepped extension of the first chamber (2) in order to separate the sand of the core residues in the already ground state separately from the molding sand in the second chamber (3) in the downstream collecting chamber (13).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Claims (16)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2751500 | 1977-11-18 | ||
DE19772751500 DE2751500C2 (de) | 1977-11-18 | 1977-11-18 | Verfahren und Vorrichtung zum Kühlen, Trocknen und Trennen von Gußstücken und Formsand in einer Kühltrommel |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0002050A2 EP0002050A2 (fr) | 1979-05-30 |
EP0002050A3 EP0002050A3 (en) | 1979-06-13 |
EP0002050B1 true EP0002050B1 (fr) | 1981-06-10 |
Family
ID=6024010
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19780101366 Expired EP0002050B1 (fr) | 1977-11-18 | 1978-11-14 | Procédé et dispositif pour refroidir, sécher et séparer dans un tambour les pièces coulées et le sable de moulage |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0002050B1 (fr) |
DE (1) | DE2751500C2 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4324367A (en) * | 1979-10-31 | 1982-04-13 | Kennecott Corporation | Sand lump crushing device |
NL8101117A (nl) * | 1981-03-09 | 1982-10-01 | Ir Cornelius Otto Jonkers Prof | Draaibare trommel voor het scheiden en koelen van gietstukken en vormzand. |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1460731A (en) * | 1920-04-26 | 1923-07-03 | Malleable Iron Fittings Co | Tumbling barrel |
DE2161030A1 (de) * | 1971-12-09 | 1973-06-14 | Demag Ag | Einrichtung zum kontinuierlichen kuehlen von gebrauchtem formsand fuer giessereien |
FR2167308A1 (en) * | 1972-01-12 | 1973-08-24 | Bonvillain & Ronceray | Sand casting cleaning and cooling plant - consists of inclined revolving barrel |
DE2607265C3 (de) * | 1976-02-23 | 1979-04-19 | Mec-Fond S.P.A., S. Prospero, Modena (Italien) | Vorrichtung zum Kühlen von Gußteilen und Formsand |
NL7614082A (nl) * | 1976-12-17 | 1978-06-20 | Expert Nv | Inrichting voor het koelen van gietstukken en het behandelen van vormzand. |
YU89478A (en) * | 1977-05-12 | 1983-01-21 | Przedsieb Projektowania Wyposa | Equipment for cooling and separating castings from casting sand |
-
1977
- 1977-11-18 DE DE19772751500 patent/DE2751500C2/de not_active Expired
-
1978
- 1978-11-14 EP EP19780101366 patent/EP0002050B1/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
EP0002050A3 (en) | 1979-06-13 |
DE2751500B1 (de) | 1978-09-28 |
DE2751500C2 (de) | 1979-06-07 |
EP0002050A2 (fr) | 1979-05-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE2913524A1 (de) | Verfahren und einrichtung zur behandlung metallurgischer schlacken | |
DE1729503B1 (de) | Vorrichtung zum Trocknen von feuchtem,koernigem Trocknungsgut | |
DE2202311C2 (de) | Anlage zur Wiedergewinnung von Sand aus dem beim Abstrahlen von kunstharzgebundenen Formen anfallenden Gemisch | |
DE2159092C3 (de) | Vorrichtung zum Regenerieren von Formsand | |
EP0011592A1 (fr) | Appareil de traitement d'ordures | |
EP0003120B1 (fr) | Procédé et dispositif de séchage de polymères chlorés | |
DE2100235C3 (de) | Anlage zum Trockenvermahlen von vorgebrochenen Rohmaterialien in einem gechlossenen Kreislaufsystem | |
DE2231722A1 (de) | Verfahren und vorrichtung zum entfernen von fluessigkeit von nassen oder feuchten teilchen | |
EP0002050B1 (fr) | Procédé et dispositif pour refroidir, sécher et séparer dans un tambour les pièces coulées et le sable de moulage | |
AT412953B (de) | Prozessapparatur zum behandeln partikelförmigen guts | |
EP1141643A1 (fr) | Deshydrateur centrifuge | |
DE2834491C2 (de) | Siebzentrifuge mit gekrümmten Siebtaschen | |
DE102004011325A1 (de) | Verfahren und Anlage zum Trocknen von Kunststoff-Granulat | |
DE1507696A1 (de) | Umwaelzstreusichter zur Trennung eines Gemisches von Grobgut und Feingut,insbesondere zum Sichten von Zement | |
DE1604902A1 (de) | Verfahren und Vorrichtung zur Behandlung von pulvrigem oder koernigem Material | |
DE2445439C3 (de) | Vorrichtung zum Aufbereiten von zerschlagenen Gießereiformen im Sinne von gebrauchtem Gießereisand und Abscheiden von Metallstücken und Restknollen | |
DE3151646A1 (de) | Verfahren und vorrichtung zum aufbereiten von feuchtem giesserei-formsand | |
DE2524809A1 (de) | Vrfahren zur mechanischen und pneumatischen reinigung und entstaubung einer granularen und/oder pulverfoermigen substanz sowie vorrichtung zur durchfuehrung des verfahrens | |
DE2239122A1 (de) | Verfahren und einrichtung zum aufbereiten eines weitgehend trockenen gemisches | |
DE2730942C2 (de) | Schaufeltrockner | |
EP0237018A2 (fr) | Dispositif pour la déshydratation et le séchage de matières solides, notamment des matières synthétiques obtenues par granulation sous l'eau | |
AT130359B (de) | Verfahren zum Brennen von Zement und ähnlichem Gut in einem zum Fertigbrennen dienenden Sinterofen. | |
DE2745179A1 (de) | Verfahren und vorrichtung zum chargenweisen mischen, trocknen und/oder granulieren von schuettguetern | |
DD154036A5 (de) | Verfahren und vorrichtung zum behandeln eines feststoffes mit einem stroemenden gas | |
EP2437016B1 (fr) | Tambour de séchage de déchets ménagers et procédé de séchage de déchets ménagers |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated contracting states |
Designated state(s): CH FR GB NL SE |
|
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 |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Designated state(s): CH FR GB NL |
|
AK | Designated contracting states |
Designated state(s): CH FR GB NL |
|
17P | Request for examination filed | ||
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Designated state(s): CH FR GB NL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Effective date: 19810610 |
|
NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 19841011 Year of fee payment: 7 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Effective date: 19881117 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19890224 Year of fee payment: 11 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CH Effective date: 19891130 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Effective date: 19900731 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |