US3388478A - Method for cooling castings - Google Patents

Method for cooling castings Download PDF

Info

Publication number
US3388478A
US3388478A US489714A US48971465A US3388478A US 3388478 A US3388478 A US 3388478A US 489714 A US489714 A US 489714A US 48971465 A US48971465 A US 48971465A US 3388478 A US3388478 A US 3388478A
Authority
US
United States
Prior art keywords
drum
castings
sand
cooling
mold
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 - Lifetime
Application number
US489714A
Other languages
English (en)
Inventor
Vissers Herbert
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.)
Landbouwwerktuigen & Maschf
LANDBOUWWERKTUIGEN-EN MACHINENFABRIEK H VISSERS
Original Assignee
Landbouwwerktuigen & Maschf
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 Landbouwwerktuigen & Maschf filed Critical Landbouwwerktuigen & Maschf
Application granted granted Critical
Publication of US3388478A publication Critical patent/US3388478A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/18—Machines or apparatus for drying solid materials or objects with movement which is non-progressive on or in moving dishes, trays, pans, or other mainly-open receptacles
    • F26B11/181—Machines or apparatus for drying solid materials or objects with movement which is non-progressive on or in moving dishes, trays, pans, or other mainly-open receptacles the receptacle being a foraminous, perforated or open-structured drum or drum-like container, e.g. rotating around a substantially horizontal or vertical axis; the receptacle being multiple perforated drums, e.g. in superimposed arrangement

Definitions

  • ABSTRACT OF THE DISCLOSURE The mold sand and cast metal contents of the mold flask are dumped into a horizontal drum wherein these contents are tumbled into intimate contact to simultaneously cool the cast metal and to dry the mold sand.
  • the drum has an imperforate inlet section wherein the cooling and drying mainly takes place and beyond this is a perforate section from which the dry mold sand is discharged.
  • a sleeve around the drum and longitudinally adjustable thereon may be positioned to block ofi part of the perforate section.
  • the invention has for its object to carry out the cooling of the castings rapidly without causing damage to the castings after the flasks have initially been cooled.
  • the contents of the flasks according to the invention are dumped into a room provided with an outlet for the generated steam and the castings and the mold sand remain in said room in intimate contact with each other during a predetermined time.
  • the flasks When dumping the contents of the flasks in said room the flasks have a temperature of about 600 C. but the mean temperature of the mold sand is much lower and depends on the ratio of the quantities of metal and sand, the surface area and the volume of the casting.
  • the room mentioned above may advantageously be constituted by a rotary drum as by the rotation of the drum the castings are continuously contacted by other quantities of sand whereby the withdrawal of heat from the castings will be eflicient.
  • the foremost part of the drum which has an unperforated circumferential wall then constitutes the room for cooling the castings and for drying the sand.
  • To said first unperforated part of the drum a part having a perforated wall is joint.
  • the withdrawal of heat from the castings may still be furthered by generating a flow of air of lower temperature through the drum preferably in counter current to the castings.
  • the drum 1 is rotatably supported on rollers 2 and at one of its end walls is provided with an inlet 3 for emptying the flasks into the drum and at its opposite end wall with an outlet 4 for castings freed from sand and with an outlet 5 for the generated steam.
  • the circumferential wall of the drum is provided with perforations 6 on part of its length and said perforations may have a diameter of about 0.8 inch and a pitch of e.g. 8 inches.
  • the length of said perforated wall part of the drum may be varied by providing one or two slidable sleeves 9 around the drum.
  • the sand passed through the perforations 6 is completely dry "and contains no lumps as said lumps have been pulverized by the castings and the sand drops into a stationary chute 7 tightly engaging the wall of the drum. If required water may be introduced into the drum by means of a conduit 8.
  • the first part of the drum wall in which the contents of the emptied flasks are received has no perforations as said part of the drum serves as a drying zone.
  • the movement of the mass in the drum is obtained in known manner by means of blades (not shown) secured at the inner side of the drum wall and which preferably are adjustable for varying the speed of the movement of the mass and thus the cooling of the castings.
  • the evaporation of the water contained in the sand and therefore the cooling of the castings and of the sand may be accelerated by maintaining a reduced pressure in the drum.
  • the degree of filling of the drum should be maintained between predetermined limits.
  • the castings leaving the drum through the outlet 4 are already partly cleaned so that the treatment thereof by means of a blast of steel grit may be shortened and beating out the cores if any is not necessary. It appears that by the short duration of treatment in the drum the shape and the dimensions of the sand grains are not affected.
  • the sand is obtained completely free of moisture the addition of water when mixing sand for repeated use for making mold may be maintained within narrow limits.
  • the advantage is obtained that the moisture free sand in a thin layer of e.g. 0.2 inch may be moved over a magnet for withdrawing particles of iron as far as possible from the sand. Moreover, the completely dry sand will not tend to adhere together when stored.
  • a method for cooling castings and for drying the mold sand used for said castings which comprises,
  • cooling liquid is introduced into the drum while the castings and mold sand are being tumbled in intimate contact, the amount of cooling liquid introduced being sufficient to cool the castings but insufficient to be retained by the mold sand.
  • a machine for cooling castings and drying mold sand comprising a substantially horizontal cylindrical drum
  • said drum having an inlet opening at one end and a discharge opening at its other end, and said drum having a circumferentially perforate section between such ends to define an imperforate mold sand and casting section at said perforate section,

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Handcart (AREA)
US489714A 1964-10-09 1965-09-23 Method for cooling castings Expired - Lifetime US3388478A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6411744A NL6411744A (fr) 1964-10-09 1964-10-09

Publications (1)

Publication Number Publication Date
US3388478A true US3388478A (en) 1968-06-18

Family

ID=19791199

Family Applications (1)

Application Number Title Priority Date Filing Date
US489714A Expired - Lifetime US3388478A (en) 1964-10-09 1965-09-23 Method for cooling castings

Country Status (8)

Country Link
US (1) US3388478A (fr)
BE (1) BE670740A (fr)
DE (1) DE1281119B (fr)
FR (1) FR1449405A (fr)
GB (1) GB1125757A (fr)
NL (1) NL6411744A (fr)
NO (1) NO115227B (fr)
SE (1) SE313637B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4993224A (fr) * 1972-09-29 1974-09-05
US3958623A (en) * 1973-07-16 1976-05-25 Expert N.V. Cooler-drier for castings and moulding sand
US3998262A (en) * 1975-01-06 1976-12-21 Didion Charles J Casting shake-out unit and method of operation
USRE29709E (en) * 1972-09-29 1978-07-25 Expert, N.V. Apparatus for cooling castings and for cooling and drying moulding sand
US4674691A (en) * 1985-10-24 1987-06-23 Didion Manufacturing Company Dual sand reclaimer
US5095968A (en) * 1990-04-09 1992-03-17 Didion Manufacturing Co. Rotary media drum with cooling component

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49147321U (fr) * 1973-04-26 1974-12-19
DE2660116C2 (de) * 1976-02-23 1981-10-01 Mec-Fond S.p.A., S. Prospero, Modena Vorrichtung zur Abführung von Gußstücken und Formsand
DE2607265C3 (de) 1976-02-23 1979-04-19 Mec-Fond S.P.A., S. Prospero, Modena (Italien) Vorrichtung zum Kühlen von Gußteilen und Formsand
CH682056A5 (fr) * 1990-03-08 1993-07-15 Fischer Ag Georg
US5924473A (en) * 1996-12-20 1999-07-20 General Kinematics Corporation Vibratory sand reclamation system
US5901775A (en) * 1996-12-20 1999-05-11 General Kinematics Corporation Two-stage heat treating decoring and sand reclamation system
US6453982B1 (en) 1996-12-20 2002-09-24 General Kinematics Corporation Sand cleaning apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1979602A (en) * 1930-08-02 1934-11-06 Svenska Flaektfabriken Ab Apparatus for carrying out heat exchange processes
US1996227A (en) * 1934-04-05 1935-04-02 Int Harvester Co Tumbling mill
US2465632A (en) * 1947-04-08 1949-03-29 Paul P Burns Tumble barrel
US2523258A (en) * 1947-06-06 1950-09-19 Ransohoff Inc N Continuous feed tumbling mill
US2955305A (en) * 1957-04-12 1960-10-11 Co Bartlett & Snow Co Sprue cleaning mill

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2600206A (en) * 1948-08-31 1952-06-10 Simpson Herbert Corp Automatic shakeout device for tight flask molds

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1979602A (en) * 1930-08-02 1934-11-06 Svenska Flaektfabriken Ab Apparatus for carrying out heat exchange processes
US1996227A (en) * 1934-04-05 1935-04-02 Int Harvester Co Tumbling mill
US2465632A (en) * 1947-04-08 1949-03-29 Paul P Burns Tumble barrel
US2523258A (en) * 1947-06-06 1950-09-19 Ransohoff Inc N Continuous feed tumbling mill
US2955305A (en) * 1957-04-12 1960-10-11 Co Bartlett & Snow Co Sprue cleaning mill

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4993224A (fr) * 1972-09-29 1974-09-05
US3942644A (en) * 1972-09-29 1976-03-09 Expert N.V. Apparatus for cooling castings and for cooling and drying moulding sand
USRE29709E (en) * 1972-09-29 1978-07-25 Expert, N.V. Apparatus for cooling castings and for cooling and drying moulding sand
US3958623A (en) * 1973-07-16 1976-05-25 Expert N.V. Cooler-drier for castings and moulding sand
US3998262A (en) * 1975-01-06 1976-12-21 Didion Charles J Casting shake-out unit and method of operation
US4674691A (en) * 1985-10-24 1987-06-23 Didion Manufacturing Company Dual sand reclaimer
US5095968A (en) * 1990-04-09 1992-03-17 Didion Manufacturing Co. Rotary media drum with cooling component

Also Published As

Publication number Publication date
GB1125757A (en) 1968-08-28
DE1281119B (de) 1968-10-24
NO115227B (fr) 1968-09-02
BE670740A (fr) 1966-01-31
SE313637B (fr) 1969-08-18
NL6411744A (fr) 1966-04-12
FR1449405A (fr) 1966-08-12

Similar Documents

Publication Publication Date Title
US3388478A (en) Method for cooling castings
US3871438A (en) Process for regenerating resin-bonded foundry sand
GB1433546A (en) Apparatus for cooling castings and for cooling and drying moulding sand
MX2014012288A (es) Un aparato y un metodo para recuperar arena de fundicion.
US3469324A (en) Rotary drum for cooling castings
US4154290A (en) Device for cooling castings and for treating moulding sand
US2443620A (en) Process for heat-treating materials
US2675333A (en) Pipe apparatus
US2262184A (en) Method and apparatus for coating molds
US3838847A (en) Drum mixer for continuous processing of a granular bulk material
AU775054B2 (en) Apparatus for blending water with sand
US3277540A (en) Device for refining foundry sand in a continuous manner
US1581635A (en) Rotary casting method and apparatus
US1483241A (en) Method and apparatus for granulating liquid slag
US2547086A (en) Heating drum
US1516913A (en) Rotary grinding machine
US1645742A (en) Process of chilling and aerating fluids and device for carrying out said process
US3050795A (en) Continuous type sand mixer
SU1271625A1 (ru) Устройство дл охлаждени гор чих сыпучих материалов
US3271018A (en) Rotary calcining kiln
US2688468A (en) Apparatus for treatment of cream and milk
US2230166A (en) Contrivance for conching chocolate mass
US1834577A (en) Diffusion apparatus
KR900005442B1 (ko) 볼형 건조기
JPS5835456Y2 (ja) 主として合成樹脂材料の乾燥装置