US3155376A - Mixing and agglomerating device for thermoplastic material - Google Patents

Mixing and agglomerating device for thermoplastic material Download PDF

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Publication number
US3155376A
US3155376A US60397A US6039760A US3155376A US 3155376 A US3155376 A US 3155376A US 60397 A US60397 A US 60397A US 6039760 A US6039760 A US 6039760A US 3155376 A US3155376 A US 3155376A
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United States
Prior art keywords
vessel
ring
blades
agitator
long blades
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
US60397A
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English (en)
Inventor
Mollenbruck Wolfgang
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.)
Werner and Pfleiderer GmbH
Original Assignee
Werner and Pfleiderer GmbH
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 Werner and Pfleiderer GmbH filed Critical Werner and Pfleiderer GmbH
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Publication of US3155376A publication Critical patent/US3155376A/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
    • B01F27/05—Stirrers
    • B01F27/07—Stirrers characterised by their mounting on the shaft
    • B01F27/072—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis
    • B01F27/0725—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis on the free end of the rotating axis
    • 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
    • B01F27/811—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 with the inflow from one side only, e.g. stirrers placed on the bottom of the receptacle, or used as a bottom discharge pump
    • B01F27/8111—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 with the inflow from one side only, e.g. stirrers placed on the bottom of the receptacle, or used as a bottom discharge pump the stirrers co-operating with stationary guiding elements, e.g. surrounding stators or intermeshing stators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
    • B29B7/06—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices
    • B29B7/10—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary
    • B29B7/12—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with single shaft
    • B29B7/16—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with single shaft with paddles or arms
    • 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
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • B01F27/1123—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades sickle-shaped, i.e. curved in at least one direction

Definitions

  • the present invention relates to devices for mixing powderized or granular material, and more particularly to devices for mixing and iagglomerating powderized thermoplastic material and a liquid such as a softener.
  • Devices of this kind generally comprise a cylindrical mixing vessel, the bottom of which is smoothly faired into the cylindrical wall, a rotary agitator disposed closely adjacent to the bottom and supported by a drive shaft parallel with the vessel axis, and a discharge duct. It is also knownto provide within the mixing vessel stationary baiiie pins coacting with the rotary agitator for the purpose of increasing the efficiency of the devices. None of such and similar designs have been found as eiiicient as desirable.
  • efiiciency is attained by arranging the agitator and also the discharge duct in accordance with the invention.
  • the rate 0f the circulation of the material within the mixing vessel should be as high as possible.
  • the rate of the velocity of the material movement is high, the material experiences a correspondingly high frictional resistance while lascending along the cylindrial wall of the vessel and such resistance causes a sharp drop of the velocity in radial and tangential directions.
  • a high velocity of the material movement results in a correspondingly high number of passages of the material past the agitator during any given period of time.
  • the material has comparatively little time to transfer the heat ywhich is generated within the material primarily during its passage of the agitator, to the wall of the vessel and into the air filling the free space between the material and the cover of the vessel.
  • the invention resides in providing an agitator, including a novel and improved blade or scoop wheel capable of lifting the material within the vessel sutiicient to maintain the aforedescribed high rate of circulation velocity of the materialy even at temperatures above 80 C.
  • the provision of the aforementioned stationary baffles would impede a high circulation velocity by constituting obstructions to a rapid ow of the material within the vessel, thus causing an increase of the required driving power and such batfies also tend to dissipate the heat generated in the material due to being thermo-conductively connected to the vessel.
  • v inafter is mounted on and driven by a drive shaft 3 disposed coaxially with the axis of the vessel.
  • the drive shaft is shown as entering the vessel through the bottom thereof, but it can also enter the vessel from the top thereof or any other suitable driving arrangment may be provided.
  • a discharge duct 4 communicates with the vessel. The arrangement of the discharge assembly will also be more fully described hereinafter.
  • the agitator comprises a blade or scoop wheel disposed elosely adjacent to the bottom of the vessel and parallel therewith.
  • the blade or scoop wheel comprises a hub or boss 5 seated on shaft 3, a ring 6 disposed coaxially with shaft 3 and a plurality of blades or scoops 7 and 8.
  • the blades are circumferentially disposed and alternately of different radial length.
  • the long blades 7 are suitably secured, for instance, by welding to hub 5 and extend from the hub close to the periphery of the vessel and more speciiically to the rounded por-tion 2 thereof.
  • the long blades support ring 6 concentric with hub 5.
  • the ring may be secured tothe blades in any suitable manner, such as welding.
  • the ring divides each long blade 7 in a radially inward portion 7a and a radially outward portion 7b.
  • the short blades terminate at ring 6 to which they are secured and extend from the ring outwardly close to the periphery of the vessel and more specifically to the rounded portion 2' Patented Nov. 3, 1964 3 thereof.
  • the provision of alternating long and short blades leaves sufficiently clear space within the center portion of the vessel to permit a substantially unimpeded circulation of the thermoplastic material along the flow lines indicated by arrows 9 and 9 when the agitator is rotated.
  • VEach of the blades or scoops 7 and 8 has a blade angle ,62 of 80 to 90.
  • the angle of pitch a of the blades may be within the range of 1 to 90.
  • the pitch of blades 7 is so selected that the height h thereof reaches about the level at which the rounded portion 2 joins the cylindrical portion 1.
  • the radially inward portion of blades 7 has a reduced height h', preferably a height which is about one half of the height Iz.
  • the short blades d have a reduced height in reference to the radially outward portion of blades 7.
  • the height of blades 8 may be approximately the same as the height of h of blades '7.
  • the discharge duct 14 is disposed perpendicularly of the axis of vessel portion 1, or in other words, horizontally when the vessel is arranged in upright position.
  • the duct communicates with the vessel tangenti-ally as can be clearly seen in FlG. 2 and preferably the center axis of duct 4 is tangential to an imaginary circle 11 intermediate vessel wall 1 and ring 6.
  • the radius of circle 11 may be arbitrarily selected within the range defined by Vthe radius of cylinder wall 1 and ring 6.
  • the discharge duct can be opened and closed by means of a closure means which comprises a closure member 14 which is movable between a closing position 'd' and an open position 4".
  • the surface of the closure member facing the inside of vessel 1 has a configuration such Y that said surface is substantially Hush with the correspending inner wall surf-ace of wall portion 2 when member 14 is in its closing position so that the closure member does not obstruct the circulation of the material within the vessel.
  • the open position 41of the closure meniber 14 the same uncovers access to a discharge conduit 13, the angle of which is so selected that the material entering duct 14 is directly guided into conduit 13 as is indicated by an arrow in FIG. 2.
  • the position of the closure member 14 may be controlled by any suitable means.
  • a linkage 15 which in the full line position opens the discharge duct and in the dotted line position closes the duct.
  • the opening and closing of the duct can also be controlled by pneumatic or electromagnetic means.
  • Various such manually or automatically operated actuating means are well known in the art and do not constitute part of the invention.
  • a device for mixing and agglomerating pulverized thermoplastic material and liquid comprising a cylindrical mixing vessel having 'a bottom faired into the cylindrical wall of the vessel by a rounded wall portion, a rotary agitator, and a drive shaft for said agitator disposed parallel with the axis of the vessel and supporting the agitator closely adjacent to the bottom of the vessel parallel thereto, said agitator including a hub receiving said shaft, a plurality of long blades supported on said hub in circumferentially spaced arrangement and extending from the hub close to said rounded wall portion, a ring secured to said long blades intermedi-ate the radial length thereof and disposed coaxially and substantially co-planar with said hub, a plurality of short blades secured to said ring lalternating with said long blades and extending radially outward, each of said long blades having radi-ally outward of said ring a blade angle of about to 90 anda pitch angle within the range of 1 to 90 and a height approximately equal
  • a device wherein the height of the portion of the long blades radially inward of said ring is about half the height of the portion of the long blades radially outward of said ring, and wherein the short blades have approximately the same height as the radially inward portion of the long blades.
  • a device according tov claim l wherein said discharge duct is mounted to define approximately a right angle with the axis of the vessel and is tangentially connected to the cylindrical portion of the vessel.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
US60397A 1959-10-17 1960-10-04 Mixing and agglomerating device for thermoplastic material Expired - Lifetime US3155376A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3155376X 1959-10-17
DEW0026566 1959-10-17
FR838884A FR1267657A (fr) 1959-10-17 1960-09-19 Machine pour mélanger et agglomérer des matières synthétiques thermoplastiques pulvérulentes

Publications (1)

Publication Number Publication Date
US3155376A true US3155376A (en) 1964-11-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US60397A Expired - Lifetime US3155376A (en) 1959-10-17 1960-10-04 Mixing and agglomerating device for thermoplastic material

Country Status (3)

Country Link
US (1) US3155376A (de)
BE (1) BE595113A (de)
FR (1) FR1267657A (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3583682A (en) * 1969-03-19 1971-06-08 Alwin Berents Mixing machine
US4123801A (en) * 1976-03-03 1978-10-31 Societe Moritz Pot-type malaxator
FR2426493A1 (fr) * 1978-05-25 1979-12-21 Bourree Pierre Melangeur perfectionne, notamment pour la fonte en continu de matieres thermoplastiques
US4228934A (en) * 1978-12-26 1980-10-21 Whirlpool Corporation Ice body delivery apparatus
US4277183A (en) * 1978-05-31 1981-07-07 Height Inc. Mixing Machine
EP0303929A2 (de) * 1987-08-18 1989-02-22 Indupack Ag Vorrichtung zum Aufbereiten thermoplastischer Kunststoffgüter
US5102326A (en) * 1986-10-10 1992-04-07 Helmut Bacher Apparatus for processing synthetic plastics material
US5304355A (en) * 1992-09-08 1994-04-19 Quantum Technologies Inc. Mixer-reactor equipment for treating fine solids with gaseous reagents
US20050170029A1 (en) * 2002-06-10 2005-08-04 Helmut Bacher Device for treating plastic material
US6935767B2 (en) 2003-07-25 2005-08-30 Sylmark Holdings Limited Stir stick assembly for blender apparatus
US20060126427A1 (en) * 2004-07-08 2006-06-15 Vmi Device for continuous mixing of dough, comprising a mixing tool, centrifuge and lateral evacuation
US7422361B2 (en) 2005-02-04 2008-09-09 Hamilton Beach Brands, Inc. Dispensing blender

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4835369A (en) * 1987-12-30 1989-05-30 Groen/A Dover Industries Company Jacketed kettle with agitator

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US644649A (en) * 1899-01-05 1900-03-06 William Walter Chocolate-kettle.
US835672A (en) * 1906-09-20 1906-11-13 Edward A Franklin Churn-dasher.
US2268038A (en) * 1940-11-16 1941-12-30 Werner G O Frank Mixing machine
CA571627A (en) * 1959-03-03 D. Fessenden Leon Propeller agitators and the dispersing of materials therewith
US2945634A (en) * 1955-05-20 1960-07-19 Henschel Werke Ges Mit Beschra Machine for mixing and comminuting materials

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA571627A (en) * 1959-03-03 D. Fessenden Leon Propeller agitators and the dispersing of materials therewith
US644649A (en) * 1899-01-05 1900-03-06 William Walter Chocolate-kettle.
US835672A (en) * 1906-09-20 1906-11-13 Edward A Franklin Churn-dasher.
US2268038A (en) * 1940-11-16 1941-12-30 Werner G O Frank Mixing machine
US2945634A (en) * 1955-05-20 1960-07-19 Henschel Werke Ges Mit Beschra Machine for mixing and comminuting materials

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3583682A (en) * 1969-03-19 1971-06-08 Alwin Berents Mixing machine
US4123801A (en) * 1976-03-03 1978-10-31 Societe Moritz Pot-type malaxator
FR2426493A1 (fr) * 1978-05-25 1979-12-21 Bourree Pierre Melangeur perfectionne, notamment pour la fonte en continu de matieres thermoplastiques
US4277183A (en) * 1978-05-31 1981-07-07 Height Inc. Mixing Machine
US4228934A (en) * 1978-12-26 1980-10-21 Whirlpool Corporation Ice body delivery apparatus
US5102326A (en) * 1986-10-10 1992-04-07 Helmut Bacher Apparatus for processing synthetic plastics material
EP0303929A2 (de) * 1987-08-18 1989-02-22 Indupack Ag Vorrichtung zum Aufbereiten thermoplastischer Kunststoffgüter
EP0303929B1 (de) * 1987-08-18 1992-12-16 Indupack Ag Vorrichtung zum Aufbereiten thermoplastischer Kunststoffgüter
US5304355A (en) * 1992-09-08 1994-04-19 Quantum Technologies Inc. Mixer-reactor equipment for treating fine solids with gaseous reagents
US20050170029A1 (en) * 2002-06-10 2005-08-04 Helmut Bacher Device for treating plastic material
US7275857B2 (en) * 2002-06-10 2007-10-02 Erema Engineering Recycling Maschinen Und Anlagen Gesellschaft M.B.H. Apparatus for treating plastics material
US6935767B2 (en) 2003-07-25 2005-08-30 Sylmark Holdings Limited Stir stick assembly for blender apparatus
US20060126427A1 (en) * 2004-07-08 2006-06-15 Vmi Device for continuous mixing of dough, comprising a mixing tool, centrifuge and lateral evacuation
US7422361B2 (en) 2005-02-04 2008-09-09 Hamilton Beach Brands, Inc. Dispensing blender

Also Published As

Publication number Publication date
BE595113A (de)
FR1267657A (fr) 1961-07-21

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