GB729514A - Improvements in rubber foam mixer - Google Patents

Improvements in rubber foam mixer

Info

Publication number
GB729514A
GB729514A GB1274/53A GB127453A GB729514A GB 729514 A GB729514 A GB 729514A GB 1274/53 A GB1274/53 A GB 1274/53A GB 127453 A GB127453 A GB 127453A GB 729514 A GB729514 A GB 729514A
Authority
GB
United Kingdom
Prior art keywords
latex
mixer
rotor
shaft
air
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
Application number
GB1274/53A
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.)
Bridgestone Firestone Inc
Original Assignee
Firestone Tire and Rubber Co
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 Firestone Tire and Rubber Co filed Critical Firestone Tire and Rubber Co
Priority to GB1274/53A priority Critical patent/GB729514A/en
Publication of GB729514A publication Critical patent/GB729514A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
    • B29B7/402—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft using a rotor-stator system with intermeshing elements, e.g. teeth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B01F25/3131—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit with additional mixing means other than injector mixers, e.g. screens, baffles or rotating elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B01F25/3133—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit characterised by the specific design of the injector
    • B01F25/31331—Perforated, multi-opening, with a plurality of holes
    • 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
    • B01F27/27—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices
    • B01F27/271—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator
    • B01F27/2711—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator provided with intermeshing elements
    • 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
    • B01F27/27—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices
    • B01F27/271—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator
    • B01F27/2714—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator the relative position of the stator and the rotor, gap in between or gap with the walls being adjustable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/82—Combinations of dissimilar mixers
    • B01F33/821—Combinations of dissimilar mixers with consecutive receptacles
    • B01F33/8212—Combinations of dissimilar mixers with consecutive receptacles with moving and non-moving stirring devices
    • 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
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
    • B29B7/401—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft having a casing closely surrounding the rotor, e.g. with a plunger for feeding the material
    • 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
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/7404—Mixing devices specially adapted for foamable substances
    • B29B7/7409—Mixing devices specially adapted for foamable substances with supply of gas
    • B29B7/7414—Mixing devices specially adapted for foamable substances with supply of gas with rotatable stirrer, e.g. using an intermeshing rotor-stator system
    • 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
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/7404—Mixing devices specially adapted for foamable substances
    • B29B7/7409—Mixing devices specially adapted for foamable substances with supply of gas
    • B29B7/7419—Mixing devices specially adapted for foamable substances with supply of gas with static or injector mixer elements
    • B29B7/7423—Mixing devices specially adapted for foamable substances with supply of gas with static or injector mixer elements preceded or followed by rotatable stirring device

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

729,514. Mixing foam rubber. FIRESTONE TIRE & RUBBER CO. Jan. 15, 1953, No. 1274/53. Class 86. A mixer for foam rubber consists of a housing having stator blades arranged on circles concentric with a shaft, a rotor secured to the shaft and having blades arranged for co-operation with the stator blades, a tubular opening arranged coaxially of the shaft for feeding material into the housing, and a free-ended extension on the shaft extending within the opening and radially spaced from the walls thereof. In Fig. 1, air from a line 16 passes out through perforations 82 in a tube 81, is rendered turbulent and is dispersed in latex flowing through the tube 12, and an intimate mixture of latex and air enters the inlet branch 73 of a mixer 14. In the branch 73 the stream of aerated latex is cleared by a torpedo-shaped free-ended extension 67, on the rotor shaft 56 of the mixer 14, so that aerated latex will enter the mixer housing 38 under conditions of uniform radial spreading. Zinc oxide, an accelerator which also assists in the gelling of the foam, is added in metered amounts through an inlet tube 77 of relatively small bore. In the mixer 14 a rotor disc 57 carries on each face protruding, integral arcuate segments 58 which are concentric with and extend between similar segments 49, 51 inwardly protruding from the base 39 and cover 43 of the.stator housing 38. The aerated latex flows first radially outwards from the branch 73 and then flows radially inwards towards an outlet chamber 53 and is churned by the relatively moving segments 58 and 49, 51 so that the bubbles are reduced in size. The foamed latex then moves out through the line 27 and is applied to an inlet 31 of a second mixer 32, Fig. 3, in which gelling agent is added. The mixer 32 is smaller than the mixer 14 and differs in that the torpedo member 67<SP>1</SP> has an enlarged vaned head 83 and in that the spaces between the rotor segments 581 extend only halfway to the rotor disc 571. The gelling agent is introduced through an inlet tube 88 of relatively small bore and by-pass openings 92, 93 in the outer wall of the rotor 57<SP>1</SP> are stated to overcome the effects of " pulse " feeding of the gelling agent through the inlet tube. In an alternative arrangement for initially dispersing the air in the latex, Fig. 6 (not shown), a diverging annular stream of air is concentre with and impinges upon an annular stream of latex within a restricted annular mixing space and the flow of air and latex are regulated by adjusting the clearances of the annular passages which form the annular streams. The mixers 14 and 32 may be duplicated in a system, Fig. 5 (not shown), in which units may be put in service alternately so that production is not interrupted during periods of cleaning or repair.
GB1274/53A 1953-01-15 1953-01-15 Improvements in rubber foam mixer Expired GB729514A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1274/53A GB729514A (en) 1953-01-15 1953-01-15 Improvements in rubber foam mixer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1274/53A GB729514A (en) 1953-01-15 1953-01-15 Improvements in rubber foam mixer

Publications (1)

Publication Number Publication Date
GB729514A true GB729514A (en) 1955-05-04

Family

ID=9719106

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1274/53A Expired GB729514A (en) 1953-01-15 1953-01-15 Improvements in rubber foam mixer

Country Status (1)

Country Link
GB (1) GB729514A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2844381B1 (en) * 2012-05-02 2018-09-19 Dow Global Technologies LLC Radial-flow rotor-stator mixer and process to produce polymeric froths

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2844381B1 (en) * 2012-05-02 2018-09-19 Dow Global Technologies LLC Radial-flow rotor-stator mixer and process to produce polymeric froths

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