US3894694A - Mixing devices - Google Patents

Mixing devices Download PDF

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Publication number
US3894694A
US3894694A US377435A US37743573A US3894694A US 3894694 A US3894694 A US 3894694A US 377435 A US377435 A US 377435A US 37743573 A US37743573 A US 37743573A US 3894694 A US3894694 A US 3894694A
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US
United States
Prior art keywords
apertures
area
side wall
stator element
series
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
US377435A
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English (en)
Inventor
Nathan Rothman
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.)
SILVERSON MACHINES Ltd
Original Assignee
SILVERSON MACHINES Ltd
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Publication date
Application filed by SILVERSON MACHINES Ltd filed Critical SILVERSON MACHINES Ltd
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Publication of US3894694A publication Critical patent/US3894694A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/81—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the stirrers having central axial inflow and substantially radial outflow
    • B01F27/812—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the stirrers having central axial inflow and substantially radial outflow the stirrers co-operating with surrounding stators, or with intermeshing stators, e.g. comprising slits, orifices or screens

Definitions

  • a mixing device comprising co-operatmg rotor and July I972 Umted Kmgdom 32842/72 stator elements.
  • the rotor element is made up of a plurality of blades mounted at one end of a shaft,
  • the [52] US. Cl 241/4611; 241/83 Stator element has a generally cylindrical Side wall [5 l] "3" Bozc formed with a series of small outlet apertures and at [58] new of Search 24l/46 46014606 least one further outlet aperture whose area is sub- 24l/46.08, 46.1l. 46.15, 46. 17.728.839.813 stantially greater than the area of each small aperture.
  • a mixing device comprises co-operating rotor and stator elements of which the rotor element comprises a plurality of blades mounted at one end of an elongated shaft adapted at an opposed end thereof for coupling to an output shaft of a motor and the stator element comprises a generally cylindrical side wall formed with a series of outlet apertures and with at least one further outlet aperture of substantially greater area than the area of each of the apertures in the said series of apertures.
  • a pair of the said further outlet apertures are provided.
  • the said pair of outlet apertures are then preferably disposed at diametrically opposed locations on the cylindrical side wall of the stator element.
  • the or each further outlet aperture area has an area which is between six and twenty times the area of each of the said series of apertures.
  • the or each further outlet aperture is spaced from the axially outer ends of the side wall of the stator element.
  • FIG. 1 is a perspective view of a first device according to the invention
  • FIG. 2 is a perspective view of a stator element in the device of FIG. 1;
  • FIG. 3 is a perspective view of a stator element in a second device according to the invention.
  • the mixing device shown in FIGS. 1 and 2 of the drawings is particularly suitable for use in disintegrating and then mixing with a liquid granular material such as mustard seeds.
  • the device is also suitable for use in mixing and disintegrating other material such as rubbers, resins or polymers in granular form.
  • the rotor element 1 includes four blades 5 which are secured to one end of an elongated shaft 7 and extend radially outwardly from the shaft at equi-angularly spaced locations. Each blade 5 has a radially outer edge thereof parallel with the axis of the shaft 7. At its end remote from the blades 5 the rotor shaft 7 is connected to an output shaft of an electric motor 9 which is mounted on an upright stand II with the output shaft thereof extending vertically downwardly.
  • the stator element 3 includes a pair of annular end walls l3 and a cylindrical side wall which is clamped between the end walls 13 by a pair of axially extending bolts 17.
  • Support means 19 of the type disclosed in our specification No. l,258,898 pendantly support the stator element 3 from the housing of the motor 9.
  • the side wall 15 of the stator element 3 is formed with a series of small outlet apertures 21 which are arranged in twelve circumferentially extending. axially spaced rows, each aperture 21 being circumferentially displaced relative to the aperture of the or each adjacent row. Each of these smaller apertures 21 is circular in section.
  • the side wall 15 of the stator element is formed with two outlet apertures 23 each of which has an area substantially greater than the area of each of the above-mentioned small apertures 21. These two larger outlet apertures 23 are disposed at diametrically opposed locations on the side wall 15 of the stator element 3.
  • Each aperture 23 is circular in section and has an area approximately ten times the area of each of the smaller apertures 21.
  • stator element 3 employed in the present device is changed to suit the material which is to be mixed and disintegrated.
  • the stator element 3 selected is one wherein each of the series of small outlet apertures 21 has crosssectional area of one thousandth of a square inch, which is smaller than the initial cross-sectional area of the seeds.
  • each of two larger outlet apertures 23 has a cross-sectional area which is aproximately l0 times the area of a seed.
  • the rotor blades 5 When assembled for use the rotor blades 5 are arranged within the stator element 3 and the rotor shaft 7 extends upwardly through the central aperture in the upper end wall 13 of the stator and through an apertured boss formed on an outer surface thereof, the end wall 13 and the boss serving to provide bearing surfaces for the lower end of the shaft 7.
  • the internal diameter of the side wall 15 of the stator element 3 is only slightly greater than the diameter of the volume swept out by the rotor blades 5.
  • the motor stand 1 In use of the device the motor stand 1] is arranged alongside a mixing vessel with the motor shaft extending downwardly towards the vessel. Assuming that the device is used for mixing and homogenising mustard seeds with water the seeds are initially piled up at the bottom of the vessel. The rotor and stator elements I and 3, respectively, are immersed in the water above the seeds.
  • stator element 3 having only the small outlet apertures 21, and no larger apertures 23, the element soon becomes blocked by the seeds or parts of seeds. Flow of seeds and water to and from the stator element 3 then ceases and seeds jammed between the rotor blades 7 and the stator element 3 eventually prevent the rotor 2 from rotating.
  • stator element 3 having only the two larger outlet apertures 23, or even more of such larger apertures, and no smaller apertures 21, it is found that there is a continuous flow of water and seeds to and from the element. However, there is little if any disintegration of the seeds.
  • stator element 3 having both smaller apertures 21 and larger outlet apertures 23 it is found that a continuous flow of water and seeds to and from the stator element is maintained and that the seeds are rapidly disintegrated and homogenised to form a gel with the water.
  • stator element 3 It is believed that the larger outlet apertures 23 of the stator element 3 are responsible for maintaining the continuous flow of seeds and water through the element, thus preventing the jamming which takes place in their absence.
  • Seeds taking part in this flow are subjected to disintegration, and subsequently to mixing and homogenising by shearing forces exerted upon them by the relative movement between the rotor blades 7 and those parts of the stator element 3 formed with the small apertures 21.
  • the stator ele' ment in a second mixing device has a cylindrical side wall 31 which is also formed with a series of small outlet apertures 33 and two outlet apertures 35 of substantially greater area.
  • the small apertures 33 of this second device are square in section. corresponding in size and shape to the outlet apertures in the stator element disclosed in our specification No. l,262,859.
  • the two larger apertures 35 are disposed at diametrically opposed locations on the side wall 3] of the stator element and at respective axially outer ends of the wall.
  • Each larger aperture 35 is generally rectangular in section and has an area approximately equal to twelve times the area of each small aperture 33.
  • a mixing device comprising co-operating rotor and stator elements of which the rotor element comprises a plurality of blades mounted at one end of an elongated shaft adapted at an opposed end thereof for coupling to an output shaft of a motor and the stator element comprises a side wall which is formed with a series of outlet apertures and with one or two further outlet apertures of substantially greater area than the area of each of the apertures in the said series of apertures, the series of outlet apertures extending throughout a section of the side wall, the location of which section, in a direction axially of the device, corresponds to the axial location of the radially outer edges of the rotor blades, and the further outlet aperture or apertures also being disposed within the said section of the side wall.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
US377435A 1972-07-13 1973-07-09 Mixing devices Expired - Lifetime US3894694A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3284272A GB1443415A (en) 1972-07-13 1972-07-13 Mixing devices

Publications (1)

Publication Number Publication Date
US3894694A true US3894694A (en) 1975-07-15

Family

ID=10344806

Family Applications (1)

Application Number Title Priority Date Filing Date
US377435A Expired - Lifetime US3894694A (en) 1972-07-13 1973-07-09 Mixing devices

Country Status (5)

Country Link
US (1) US3894694A (it)
DE (1) DE2335773A1 (it)
FR (1) FR2192861B3 (it)
GB (1) GB1443415A (it)
IT (1) IT991165B (it)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4570863A (en) * 1983-01-10 1986-02-18 C. Arthur Knox Wet grinding machine
US5174508A (en) * 1991-08-16 1992-12-29 Source For Automation, Inc. Tablet extraction and analysis system and method
US5320285A (en) * 1993-08-18 1994-06-14 Lu Tsai Chuan Grinding mixer
US6000840A (en) * 1997-12-17 1999-12-14 Charles Ross & Son Company Rotors and stators for mixers and emulsifiers
US10687670B2 (en) 2014-07-18 2020-06-23 Vita-Mix Management Corporation Shear blade assembly for a blender
WO2020213192A1 (ja) 2019-04-15 2020-10-22 エム・テクニック株式会社 攪拌機
KR20210151060A (ko) 2019-04-15 2021-12-13 엠. 테크닉 가부시키가이샤 교반기

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0988887B1 (de) * 1998-08-25 2003-02-05 Vakumix Rühr- und Homogenisiertechnik Aktiengesellschaft Homogenisator mit Schutzvorrichtung auf dem Rotor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2886254A (en) * 1957-09-03 1959-05-12 Rohlinger Demountable and separable pulverizer
US3380669A (en) * 1966-04-11 1968-04-30 Black Clawson Co Plural defibering zones in a pulping apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2886254A (en) * 1957-09-03 1959-05-12 Rohlinger Demountable and separable pulverizer
US3380669A (en) * 1966-04-11 1968-04-30 Black Clawson Co Plural defibering zones in a pulping apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4570863A (en) * 1983-01-10 1986-02-18 C. Arthur Knox Wet grinding machine
US5174508A (en) * 1991-08-16 1992-12-29 Source For Automation, Inc. Tablet extraction and analysis system and method
US5320285A (en) * 1993-08-18 1994-06-14 Lu Tsai Chuan Grinding mixer
US6000840A (en) * 1997-12-17 1999-12-14 Charles Ross & Son Company Rotors and stators for mixers and emulsifiers
US10687670B2 (en) 2014-07-18 2020-06-23 Vita-Mix Management Corporation Shear blade assembly for a blender
WO2020213192A1 (ja) 2019-04-15 2020-10-22 エム・テクニック株式会社 攪拌機
KR20210151060A (ko) 2019-04-15 2021-12-13 엠. 테크닉 가부시키가이샤 교반기

Also Published As

Publication number Publication date
FR2192861A1 (it) 1974-02-15
DE2335773A1 (de) 1974-01-31
IT991165B (it) 1975-07-30
FR2192861B3 (it) 1976-07-02
GB1443415A (en) 1976-07-21

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