US3469324A - Rotary drum for cooling castings - Google Patents

Rotary drum for cooling castings Download PDF

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Publication number
US3469324A
US3469324A US698320A US3469324DA US3469324A US 3469324 A US3469324 A US 3469324A US 698320 A US698320 A US 698320A US 3469324D A US3469324D A US 3469324DA US 3469324 A US3469324 A US 3469324A
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US
United States
Prior art keywords
drum
castings
sand
mold
liner
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
US698320A
Inventor
Herbert Vissers
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 MAS FAB H VISSERS NV
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
Priority claimed from NL6411744A external-priority patent/NL6411744A/xx
Application filed by Landbouwwerktuigen & Maschf filed Critical Landbouwwerktuigen & Maschf
Application granted granted Critical
Publication of US3469324A publication Critical patent/US3469324A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F26B11/185—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 the drum provided with internal subdivisions or multiple walls
    • F26B11/188—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 the drum provided with internal subdivisions or multiple walls the subdivisions consisting of concentric perforated walls, or spiral-shaped walls
    • 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
    • B22C5/04—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by grinding, blending, mixing, kneading, or stirring
    • 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
    • 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

Definitions

  • a rotary drum adapted to receive the hot castings and mold sand contents of mold flasks is provided near its discharge end with a circumferentially perforate section for separating the dried sand with its remaining section imperforate.
  • a perforated lining is positioned within the and spaced from the drum and extends over at least part of the length of the imperforate section so as to improve tumbling contact between sand and castings in that section by cycling sand continuousl into the space between the liner and drum and then back into the liner as the drum and liner rotate.
  • This invention relates to an improvement of the rotary drum for cooling castings and for cooling and drying the mold sand used for said castings, the contents of the flasks being dumped into the rotary drum, having an imperforate foremost section and a perforated section joined to said first section, as described in patent application 489,714 of Sept. 23, 1965, now Patent No 3,388,478, patented June 18, 1968.
  • the invention has for its object to accelerate the cooling of the castings and the sand and according to the invention a perforated lining is provided at least along a part of the length of the foremost drum section, where the wall of the drum is imperforated, said lining rotating together with the drum and defining a circumferential space with the wall of the drum.
  • FIG. 1 is a side view of the drum with part in section and FIG. 2 is an end view of the drum.
  • a lining 3 is provided in the drum 1 which in its rearmost part is provided with perforations 2 and said lining has perforations 4 and extends at least along part 3,469,324 Patented Sept. 30, 1969 of the length of the imperforated part of the drum.
  • the perforated lining 3 is supported in the drum by means of beams 5 extending in longitudinal direction so that a space 6 is left between the lining and the Wall of the drum.
  • the drum 1 is supported in a frame 7 on which a driving shaft 9 with a motor 8 are supported.
  • Two chain wheels 10 are secured on the shaft 10 and drive chains 11 engaging a toothed rim arranged on the drum impart rotary drive to the latter.
  • the flasks after having been subjected to an initial cooling are opened and dumped into a casing 13 at 12, said casing opening into the open foremost end of the drum, so that the sand constitutes a slope at said end of the drum and the castings are surrounded by humid sand, whereby the heat of the castings is withdrawn very uniformly, so that stresses due to shrinking of the castings are avoided.
  • the transport of the castings and the sand in the drum may be obtained by blades secured at the inner side of the perforated lining and already partly dried sand falls through the perforations 4 of the lining into the space 6 and is moved upwards in order to fall back in the drum when the perforations reach their highest position so that the sand again comes into contact with the castings.
  • the now completely dry and ground sand leaves the drum at the rearmost part through the perforations 2 and the castings leave the drum at its open end at 15.
  • the space 6 between the perforated lining 3 and the circumferential wall of the drum 1 may be divided in compartments by means of partitions.
  • a fan 17 draws air through the drum by means of a conduit 14 connected to the casing 13 and which conduit opens into a dust separator 16 so that said air carries away the water vapour, dust and broken quartz grains from the drum.
  • a machine for cooling castings and drying mold sand of the type including a substantially horizontal drum, means mounting said drum for rotation about its longitudinal axis, said drum having an inlet opening at one end and a discharge opening at its other end, and said drum having an imperforate section adjacent said inlet opening and a perforate section adjacent said discharge opening whereby castings and mold sands are comingled within said imperforate section, mold sand is separated from the castings and discharged at said perforate section, and castings are discharged at said discharge opening, the improve ment comprising:
  • a liner disposed within said drum along at least a part of the length of said imperforate section, said liner being secured for rotation with said drum and defining a sand-receiving space between the liner and drum,
  • said liner being perforate to allow sand to recycle from the interior of the liner whereat the castings and mold sand comingle, into said sand-receiving space and back into the interior of said liner in response to rotation of said drum and liner, whereby to enhance the cooling of the castings by the sand and the drying of the sand by the castings.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • General Induction Heating (AREA)
  • Processing Of Solid Wastes (AREA)

Description

Sept. 30, 1969 H. VISSERS ROTARY DRUM FOR COOLING CASTINGS Filed Jan. 16. 1968 0uooocoooooo POE &
I N VENTOR VissERs HERBERT- ATTORNEYS United States Patent U.S. C]. 34-13 3 Claims ABSTRACT OF THE DISCLOSURE A rotary drum adapted to receive the hot castings and mold sand contents of mold flasks is provided near its discharge end with a circumferentially perforate section for separating the dried sand with its remaining section imperforate. A perforated lining is positioned within the and spaced from the drum and extends over at least part of the length of the imperforate section so as to improve tumbling contact between sand and castings in that section by cycling sand continuousl into the space between the liner and drum and then back into the liner as the drum and liner rotate.
This invention relates to an improvement of the rotary drum for cooling castings and for cooling and drying the mold sand used for said castings, the contents of the flasks being dumped into the rotary drum, having an imperforate foremost section and a perforated section joined to said first section, as described in patent application 489,714 of Sept. 23, 1965, now Patent No 3,388,478, patented June 18, 1968.
After dumping the mold sand and solidified casting contents of the mold flasks into the rotary drum the castings and the sand remain in intimate contact with each other and as the mean temperature of the sand is much lower than that of the castings, heat from the castings will be transmitted to the loose sand, whereby the castings are cooled and the moisture contained in the sand will evaporate, so that the heat taken up by the sand will be withdrawn and the sand will be dried.
The invention has for its object to accelerate the cooling of the castings and the sand and according to the invention a perforated lining is provided at least along a part of the length of the foremost drum section, where the wall of the drum is imperforated, said lining rotating together with the drum and defining a circumferential space with the wall of the drum. With said embodiment of the drum, sand will fall into the space defined between the lining and the wall of the drum through the lining perforations and upon further rotation of the drum the sand will fall back through the perforations in the lining and will come into contact with the castings to extract heat therefrom.
The invention will be further described with reference to the accompanying drawing showing an embodiment of the drum according to the invention.
FIG. 1 is a side view of the drum with part in section and FIG. 2 is an end view of the drum.
A lining 3 is provided in the drum 1 which in its rearmost part is provided with perforations 2 and said lining has perforations 4 and extends at least along part 3,469,324 Patented Sept. 30, 1969 of the length of the imperforated part of the drum. The perforated lining 3 is supported in the drum by means of beams 5 extending in longitudinal direction so that a space 6 is left between the lining and the Wall of the drum.
The drum 1 is supported in a frame 7 on which a driving shaft 9 with a motor 8 are supported. Two chain wheels 10 are secured on the shaft 10 and drive chains 11 engaging a toothed rim arranged on the drum impart rotary drive to the latter. The flasks after having been subjected to an initial cooling are opened and dumped into a casing 13 at 12, said casing opening into the open foremost end of the drum, so that the sand constitutes a slope at said end of the drum and the castings are surrounded by humid sand, whereby the heat of the castings is withdrawn very uniformly, so that stresses due to shrinking of the castings are avoided. The transport of the castings and the sand in the drum may be obtained by blades secured at the inner side of the perforated lining and already partly dried sand falls through the perforations 4 of the lining into the space 6 and is moved upwards in order to fall back in the drum when the perforations reach their highest position so that the sand again comes into contact with the castings. The now completely dry and ground sand leaves the drum at the rearmost part through the perforations 2 and the castings leave the drum at its open end at 15.
The space 6 between the perforated lining 3 and the circumferential wall of the drum 1 may be divided in compartments by means of partitions.
A fan 17 draws air through the drum by means of a conduit 14 connected to the casing 13 and which conduit opens into a dust separator 16 so that said air carries away the water vapour, dust and broken quartz grains from the drum.
What I claim is:
1. In a machine for cooling castings and drying mold sand of the type including a substantially horizontal drum, means mounting said drum for rotation about its longitudinal axis, said drum having an inlet opening at one end and a discharge opening at its other end, and said drum having an imperforate section adjacent said inlet opening and a perforate section adjacent said discharge opening whereby castings and mold sands are comingled within said imperforate section, mold sand is separated from the castings and discharged at said perforate section, and castings are discharged at said discharge opening, the improve ment comprising:
a liner disposed within said drum along at least a part of the length of said imperforate section, said liner being secured for rotation with said drum and defining a sand-receiving space between the liner and drum,
means for introducing mold sand and solidified casting contents of mold flasks into said liner,
and said liner being perforate to allow sand to recycle from the interior of the liner whereat the castings and mold sand comingle, into said sand-receiving space and back into the interior of said liner in response to rotation of said drum and liner, whereby to enhance the cooling of the castings by the sand and the drying of the sand by the castings.
2. In the machine as defined in claim 1 including a stationary casing for initially receiving the castings and mold sand, said casing discharging directly into said liner.
3. In the method of cooling castings and for drying the mold sand used for such castings which includes the steps References Cited of dumping the mold sand and solidified casting contents of mold flasks into a rotatable drum while the castings UNITED STATES PATENTS are still hot, tumbling the casting in intimate contact with 832,961 10/1906 Elkus 34136 XR the mold sand for a time sufiicient to cool the castings by 5 2,131,260 9/ 1938 Temple drying the mold sand, and then separating the dry mold 214251984 8/1947 Blackman 51 164 XR sand from the castings and separately discharging the 2,523,258 9/ 1950 Ransohofi 5 4 dry mold sand and Castings from the rotating drum, the 1 4/1960 Bintzler 51-164 improvement comprising the step of:
continuously separating some of the mold sand from 10 KENNETH W. SPRAGUE, Primary Examiner the castings and later comingling it with the castings during the step of tumbling the castings in intimate US. Cl. X.R. contact with the mold sand. 34-136
US698320A 1964-10-09 1968-01-16 Rotary drum for cooling castings Expired - Lifetime US3469324A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL6411744A NL6411744A (en) 1964-10-09 1964-10-09
NL6701529A NL6701529A (en) 1964-10-09 1967-02-01

Publications (1)

Publication Number Publication Date
US3469324A true US3469324A (en) 1969-09-30

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US698320A Expired - Lifetime US3469324A (en) 1964-10-09 1968-01-16 Rotary drum for cooling castings

Country Status (8)

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US (1) US3469324A (en)
BE (1) BE709403A (en)
DE (1) DE1300204B (en)
FR (1) FR95023E (en)
GB (1) GB1219427A (en)
NL (1) NL6701529A (en)
NO (1) NO119959B (en)
SE (1) SE323771B (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4211274A (en) * 1977-05-12 1980-07-08 Przedsiegiorstwo Projektowania I Wyposazania Odlewni "Prodlew" Equipment for cooling and separation of castings and moulding sand
EP0060010A1 (en) * 1981-03-09 1982-09-15 Cornelius Otto Jonkers A drum for separating castings and molding sand or the like
US5190371A (en) * 1988-07-27 1993-03-02 Pedershaab Maskinfabrik A/S Method and plant producing a bituminous paving mixture
US5220732A (en) * 1992-02-10 1993-06-22 Michael Lee Cooling rocks and sand
CN102878783A (en) * 2012-10-09 2013-01-16 边浩光 Continuous drying machine
US10076854B2 (en) * 2015-03-24 2018-09-18 Qatar University Aggregate cooling for hot weather concreting
CN111854368A (en) * 2020-07-29 2020-10-30 毛昌运 Wind power drying device based on solar energy sunning agricultural product
CN112229178A (en) * 2020-10-11 2021-01-15 苏州策尼特建材科技有限公司 Novel building material is dry device
US20220057139A1 (en) * 2018-12-20 2022-02-24 Pelleton Global Renewables Ltd. Pellet Processing Drum
US12123648B2 (en) * 2018-12-20 2024-10-22 Pelleton Global Renewables Ltd. Pellet processing drum

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2660116C2 (en) * 1976-02-23 1981-10-01 Mec-Fond S.p.A., S. Prospero, Modena Device for the discharge of castings and molding sand
DE2607265C3 (en) 1976-02-23 1979-04-19 Mec-Fond S.P.A., S. Prospero, Modena (Italien) Device for cooling castings and molding sand
US4674691A (en) * 1985-10-24 1987-06-23 Didion Manufacturing Company Dual sand reclaimer
GB2229800B (en) * 1989-03-28 1993-08-04 Stein Atkinson Strody Ltd Scrap recovery apparatus
CN103978154B (en) * 2014-04-22 2016-10-12 河北瑞欧消失模科技有限公司 The pinwheel cooler that sand temperature automatically controls
CN115371383A (en) * 2022-08-01 2022-11-22 黑龙江省农业机械工程科学研究院佳木斯分院 Heat pump continuous type grain drying device with dust removal edulcoration effect

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US832961A (en) * 1906-05-17 1906-10-09 Laurence Elkus Combined sand drier and screen.
US2131260A (en) * 1938-01-12 1938-09-27 Victor Metal Products Corp Tumbler
US2425984A (en) * 1942-09-26 1947-08-19 Blackman Stanley Method for cleaning capsules and the like
US2523258A (en) * 1947-06-06 1950-09-19 Ransohoff Inc N Continuous feed tumbling mill
US2933861A (en) * 1958-05-08 1960-04-26 Ransohoff Company Continuous feed tumbling apparatus

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
US832961A (en) * 1906-05-17 1906-10-09 Laurence Elkus Combined sand drier and screen.
US2131260A (en) * 1938-01-12 1938-09-27 Victor Metal Products Corp Tumbler
US2425984A (en) * 1942-09-26 1947-08-19 Blackman Stanley Method for cleaning capsules and the like
US2523258A (en) * 1947-06-06 1950-09-19 Ransohoff Inc N Continuous feed tumbling mill
US2933861A (en) * 1958-05-08 1960-04-26 Ransohoff Company Continuous feed tumbling apparatus

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4211274A (en) * 1977-05-12 1980-07-08 Przedsiegiorstwo Projektowania I Wyposazania Odlewni "Prodlew" Equipment for cooling and separation of castings and moulding sand
EP0060010A1 (en) * 1981-03-09 1982-09-15 Cornelius Otto Jonkers A drum for separating castings and molding sand or the like
WO1982003029A1 (en) * 1981-03-09 1982-09-16 Cornelius Otto Jonkers A drum for separating castings and molding sand or the like
US4933073A (en) * 1981-03-09 1990-06-12 Jonkers Cornelis O Drum for separating castings and molding sand or the like
US5190371A (en) * 1988-07-27 1993-03-02 Pedershaab Maskinfabrik A/S Method and plant producing a bituminous paving mixture
US5220732A (en) * 1992-02-10 1993-06-22 Michael Lee Cooling rocks and sand
CN102878783A (en) * 2012-10-09 2013-01-16 边浩光 Continuous drying machine
US10076854B2 (en) * 2015-03-24 2018-09-18 Qatar University Aggregate cooling for hot weather concreting
US20220057139A1 (en) * 2018-12-20 2022-02-24 Pelleton Global Renewables Ltd. Pellet Processing Drum
US12123648B2 (en) * 2018-12-20 2024-10-22 Pelleton Global Renewables Ltd. Pellet processing drum
CN111854368A (en) * 2020-07-29 2020-10-30 毛昌运 Wind power drying device based on solar energy sunning agricultural product
CN112229178A (en) * 2020-10-11 2021-01-15 苏州策尼特建材科技有限公司 Novel building material is dry device

Also Published As

Publication number Publication date
NL6701529A (en) 1968-08-02
DE1300204B (en) 1969-09-18
GB1219427A (en) 1971-01-13
NO119959B (en) 1970-08-03
BE709403A (en) 1968-07-05
SE323771B (en) 1970-05-11
FR95023E (en) 1970-03-27

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