US3628740A - Centrifugal powdering machine - Google Patents

Centrifugal powdering machine Download PDF

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Publication number
US3628740A
US3628740A US227A US3628740DA US3628740A US 3628740 A US3628740 A US 3628740A US 227 A US227 A US 227A US 3628740D A US3628740D A US 3628740DA US 3628740 A US3628740 A US 3628740A
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US
United States
Prior art keywords
sleeve
disc
chamber
cover
powdering
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
US227A
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English (en)
Inventor
Kazuteru Tako
Hiroshi Gunji
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Individual
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Individual
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Filing date
Publication date
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Publication of US3628740A publication Critical patent/US3628740A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/14—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers
    • B02C18/148—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers specially adapted for disintegrating plastics, e.g. cinematographic films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge

Definitions

  • ABSTRACT A powdering machine utilizing centrifugal force in which there is provided a jacket having percussion protru- [54] CENTRIFUGAL POWDERING MACIIlNE sions all over the surface of its barrel inner wall, a erforated P 1 Claim, 2 Drawing Figs.
  • the centrifugal powdering machine of the present invention is a marked improvement on the existing machines adopting such imperfect methods. It not only eliminates the above-mentioned disadvantages and troubles but also simplifies the construction and enhances the productivity.
  • the present invention relates to a centrifugal powdering machine which comprises a jacket having percussion protrusions all over the surface of the inner wall of its cylindrical barrel, the inside of the jacket serving as a powdering chamber, a disc mounted on the rotary shaft provided at the center of the projecting shell portion of the powdering chamber, a perforated cylindrical rotary screen and beating bars both fitted rotatably to the disc, a perforated cylindrical stationary screen inserted removably between the inner wall of the barrel and the perforated cylindrical rotary screen, an inlet pipe portion fitted to the cover of the barrel for connecting a hopper and feeder at the powdering chamber and a discharge port provided at the bottom of the powdering chamber.
  • FIG. 1 is a longitudinal section of the entire part of the powdering machine, shown with a part of its rotary screen cut off.
  • FIG. 2 is a section taken along line II II of FIG. 1.
  • One side of a cylindrical barrel 1 of the jacket is provided with a portion 2 forming the bottom, and the other open side is closed by a cover 3.
  • the interior of inner wall 5 of the barrel l is a void 7 for passing liquid 29, with the void 7 being provided with an inlet 8 and an outlet 9 so that the liquid 29 can circulate to cool the barrel 1 and its interior.
  • the inner wall 5 of the barrel 1 is provided all over its inside surface with percussion protrusions 6, with the hollow space further inside forming a powdering chamber 20.
  • a cylindrical stationary sleeve or screen 10 having numerous holes It and fitted removably to a sideplate 4 which forms the bottom of the barrel l.
  • the stationary screen 10 may be fitted to the sideplate 4 by providing an annular groove 30 or annular protrusion for the sideplate 4. Since this stationary screen 10 is supported also by the cover 3 it is fixed securely.
  • a cylindrical rotary sleeve or screen 12 which has numerous holes 13.
  • This rotary screen I2 is mounted removably on a disc 14 which is mounted removably on a rotary shaft so that both the rotary screen 12 and the disc M can rotate together.
  • the objects 28 to be powdered charged into the hopper 22 are deposited in the powdering chamber 20 by the feeder.
  • the disc 14 rotates at a high speed on the rotary shaft 15 to set the rotary screen 12 and the beating bars 16 into rotation at the same time.
  • the objects 28 carried into the interior of this rotary screen 12 strike against the rotating disc 14, are beaten and crushed roughly by the beating bars 16, discharged from the rotary screen 12 through the holes 13 by the centrifugal force of the rotary screen 12 and dashed violently against the stationary screen 10 provided at the outside of the rotary screen 12 to be further pulverized into fine powder.
  • the objects 28 are crushed extremely finely in the void between the internal rotary screen 2 and the external stationary screen 10 because the screen 12 is rotating at a high speed and the screen 10 is placed close to the screen 12.
  • Both the rotary screen 12 and stationary screen 10, mounted removably on the disc 14 and on the bottom plate 4 respectively, are replaceable. Therefore, an excellent powdering condition can be obtained and the grains roughly crushed by the round or square beating bars 16 fixed to the disc 14 can be pulverized very finely by proper selection and combination of screens 10 and 12 having ideal sizes of holes 11 and 13 depending on the objects to be powdered 28.
  • the fine particles thus obtained are blown out through the holes 11 of the stationary screen 10 by the wind pressure caused by the rotary screen 12 and dashed against the percussion protrusions 6 provided on the inner wall 5 which define the powdering chamber 20 and further pulverized into fine powder.
  • the powder thus obtained is removed through the discharge port 26.
  • This machine depends mainly on the beating bars 16, the rotary screen 12, the stationary screen 10 and the percussion protrusions 6 for the powdering operation.
  • its rotary shaft 15, disc 14, beating bars 16, etc. are heated by the frictional heat during the operation, with the result that the objects 28, especially in the case of thermoplastic synthetic resins, tend to soften.
  • liquid (water) 29 is always kept circulating in the void 7 of the inner wall 5 of the barrel 1 to cool the rotary shaft R5, the disc 14, the beating bars 16, etc., as well as the interior of the powdering chamber and the percussion protrusions 6. Hence, the heat troubles are avoided and the objects 28 are prevented from quality changes.
  • the operation can be carried out very smoothly and powder having any desired particle size can be obtained at high efficiency.
  • plastic materials like thermoplastic and thermosetting synthetic resins, hard materials like glass and granular materials like pigments and paints into fine powder thereby largely improving various industrial effects.
  • a centrifugal powdering machine for materials, particularly synthetic resins comprising a cylindrical barrel having an open end and a closed end, a cover for the open end, said barrel having sidewalls and an end wall spaced inwardly of the barrel for providing a space through which a cooling medium may circulate, said sidewall having an inner surface provided with percussion protrusions entirely thereabout, with the space defined by the sidewalls and end wall constituting a powdering chamber closed by said cover, a disc within the chamber adjacent the end wall, means mounting the disc for rotation relative to the end wall, with said disc being removable from the powdering chamber, said disc having a plurality of beating bars extending axially of the chamber and terminating adjacent said cover, a first perforated cylindrical sleeve removably supported by the disc and surrounding the beater bars, a second perforated cylindrical sleeve having an inner diameter slightly greater than the outer diameter of the first cylindrical sleeve surrounding the first cylindrical sleeve, said second cylindrical sleeve being

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Disintegrating Or Milling (AREA)
  • Crushing And Grinding (AREA)
US227A 1969-01-22 1970-01-02 Centrifugal powdering machine Expired - Lifetime US3628740A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP458869 1969-01-22

Publications (1)

Publication Number Publication Date
US3628740A true US3628740A (en) 1971-12-21

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ID=11588183

Family Applications (1)

Application Number Title Priority Date Filing Date
US227A Expired - Lifetime US3628740A (en) 1969-01-22 1970-01-02 Centrifugal powdering machine

Country Status (4)

Country Link
US (1) US3628740A (enrdf_load_stackoverflow)
CH (1) CH506327A (enrdf_load_stackoverflow)
DE (1) DE2001324A1 (enrdf_load_stackoverflow)
GB (1) GB1301642A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2265516C1 (ru) * 2004-04-05 2005-12-10 Открытое акционерное общество "Механобр-Техника" Шнековый измельчитель изношенных автопокрышек
US20070221765A1 (en) * 2004-02-27 2007-09-27 Emerson Electric Co. Food Waste Disposer Grinding Mechanism
CN103721788A (zh) * 2013-11-25 2014-04-16 南通威明精工机械有限公司 一种玻璃粉碎机

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103170396A (zh) * 2013-04-19 2013-06-26 昆山聚贝机械设计有限公司 珠磨机冷却型端盖
CN111250223B (zh) * 2020-02-16 2021-11-02 宿迁腾安新型建材有限公司 一种用于大量物料研磨的卧式球磨机
CN111617873A (zh) * 2020-06-08 2020-09-04 湘乡市旺达输送设备制造有限公司 一种碎石机出料口
CN114682369A (zh) * 2022-05-31 2022-07-01 河北津西新材料科技有限公司 一种钢渣多级破磨超细钢渣粉制备装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US351613A (en) * 1886-10-26 Clay reducer and pulverizer
US1483742A (en) * 1922-01-12 1924-02-12 William Douglas & Sons Ltd Method and means for the treatment of fats and oils
US1991899A (en) * 1933-04-04 1935-02-19 Halvor F Holbeck Grinding apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US351613A (en) * 1886-10-26 Clay reducer and pulverizer
US1483742A (en) * 1922-01-12 1924-02-12 William Douglas & Sons Ltd Method and means for the treatment of fats and oils
US1991899A (en) * 1933-04-04 1935-02-19 Halvor F Holbeck Grinding apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070221765A1 (en) * 2004-02-27 2007-09-27 Emerson Electric Co. Food Waste Disposer Grinding Mechanism
US7735760B2 (en) * 2004-02-27 2010-06-15 Emerson Electric Co. Food waste disposer grinding mechanism
RU2265516C1 (ru) * 2004-04-05 2005-12-10 Открытое акционерное общество "Механобр-Техника" Шнековый измельчитель изношенных автопокрышек
CN103721788A (zh) * 2013-11-25 2014-04-16 南通威明精工机械有限公司 一种玻璃粉碎机
CN103721788B (zh) * 2013-11-25 2017-02-15 南通威明精工机械有限公司 一种玻璃粉碎机

Also Published As

Publication number Publication date
DE2001324A1 (de) 1970-08-13
GB1301642A (enrdf_load_stackoverflow) 1973-01-04
CH506327A (de) 1971-04-30

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