EP0109168A2 - Appareil de production de mélanges, de dispersions et similaires - Google Patents

Appareil de production de mélanges, de dispersions et similaires Download PDF

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Publication number
EP0109168A2
EP0109168A2 EP83306053A EP83306053A EP0109168A2 EP 0109168 A2 EP0109168 A2 EP 0109168A2 EP 83306053 A EP83306053 A EP 83306053A EP 83306053 A EP83306053 A EP 83306053A EP 0109168 A2 EP0109168 A2 EP 0109168A2
Authority
EP
European Patent Office
Prior art keywords
vessel
agitator
noise level
noise
materials
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.)
Granted
Application number
EP83306053A
Other languages
German (de)
English (en)
Other versions
EP0109168A3 (en
EP0109168B1 (fr
Inventor
Robert William English
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.)
Netzsch Mastermix Ltd
Original Assignee
Netzsch Mastermix Ltd
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 Netzsch Mastermix Ltd filed Critical Netzsch Mastermix Ltd
Priority to AT83306053T priority Critical patent/ATE40531T1/de
Publication of EP0109168A2 publication Critical patent/EP0109168A2/fr
Publication of EP0109168A3 publication Critical patent/EP0109168A3/en
Application granted granted Critical
Publication of EP0109168B1 publication Critical patent/EP0109168B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44D—PAINTING OR ARTISTIC DRAWING, NOT OTHERWISE PROVIDED FOR; PRESERVING PAINTINGS; SURFACE TREATMENT TO OBTAIN SPECIAL ARTISTIC SURFACE EFFECTS OR FINISHES
    • B44D3/00—Accessories or implements for use in connection with painting or artistic drawing, not otherwise provided for; Methods or devices for colour determination, selection, or synthesis, e.g. use of colour tables
    • B44D3/06—Implements for stirring or mixing paints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/21—Measuring
    • B01F35/213—Measuring of the properties of the mixtures, e.g. temperature, density or colour

Definitions

  • European Patent No. 0000827 describes apparatus for production of mixtures, dispersions and the like in which mixing apparatus comprises a vessel for receiving liquid and other material to be mixed and a rotary agitator for immersion into the contents of the vessel, and is characterised by means responsive to the noise level emitted by the contents of the vessel during agitation for automatically adjusting the vertical position of the agitator.
  • Such apparatus is widely used for example in the manufacture of paint, and before the proposals in the said European Patent mixing was controlled manually, and in particular the operator would raise and lower the agitator to an optimum height depending upon the observed level of liquid in the pot and upon the observed condition of the mixture, which called for a high degree of operator skill.
  • the object of the present invention is to provide further improvements in apparatus of this kind.
  • mixing apparatus comprises a vessel for receiving liquid and other materials to be mixed, a rotary agitator for immersion into the contents of the vessel, and means responsive to the noise level emitted by the contents of the vessel during agitation, and is characterised in that the said means responsive to the noise level are used to control admission of materials to the vessel.
  • the apparatus comprises a pot 10 for receiving liquid and finely divided materials to be mixed with the liquid.
  • the pot has a cover 12 which may have suitable openings (not shown) for introduction of the materials.
  • a vertical shaft 14 extends through the cover 12 and carries an agitator 16 which may be of any structure conventionally used in the art.
  • the shaft 14 is supported from a column 18 via a cantilever arm 20 and is driven rotatably by an electric motor (not shown).
  • the arm 20 is movable upwardly and downwardly to vary the depth of immersion of the agitator 16 and suitable raising and lowering gear is provided for this purpose.
  • the raising and lowering gear may take various forms and the illustrated embodiment employs a single acting hydraulic ram 24 whose cylinder is fixed and whose piston is connected to the arm 20. Hydraulic oil is supplied to the ram 24 by a pump 26 via an electrically operable spool valve 28. As shown, the valve 28 is in a neutral condition in which no oil is supplied to or withdrawn from the ram 24, the pump 26 being connected directly to sump 30. When the spool valve is displaced upwardly, the pump 26 supplies oil to the ram 24 to raise the agitator and when the valve is displaced downwardly from the neutral position, oil is with drawn from the rain 24 to lower the agitator 16.
  • the valve 28 is controlled by appropriate circuitry which is designed to maintain the agitator at a level within the vessel which will give optimum mixing of the contents of the pot.
  • the optimum level may vary, e.g. as more and more material is introduced into the vessel, which means that the vertical position of the agitator must be varied accordingly to maintain optimum mixing conditions.
  • the noise level produced by the turbulence of the agitated contents of the vessel is monitored by means of a microphone 32 and the circuitry and the valve 28 is operated so that the agitator is maintained at a level corresponding to a preselected range of noise levels, i.e. the noise level range corresponding to the optimum vertical position of the agitator.
  • This range can be readily determined on an empirical D asis and typically will be in the region of 80 to 90 decibels. In general, the noise level will increase beyond the desired range when the agitator is too close to the liquid surface and will decrease when the agitator is too remote from the surface.
  • Material to be admitted to the pot is stored in the hopper 34 connected by a delivery duct 36 to an opening in the lid of the pot, with a control valve 38 at the end of the duct adjacent the lid and possibly with a further control valve 40 at the hopper end of the duct.
  • Powder in the hopper 34 is fluidised by by a vibro-motor 42. When both valves 38 and 40 are open, and at least when the vibro-motor 42 is operated, powder is discharged from the hopper into the pot 10.
  • the valves 38 and 40 are motor-operated under the control of signals from said circuitry, and the signal (to cause the valves to open, or hold them open) is generated only when the noise increases beyond a preselected level.
  • the signal to cause the valves to open, or hold them open
  • the valves 38, 40 can be opened, and when the noise level causes the agiator to be raised, the valves 38, 40 will be closed.
  • a current development in paint manufacturing technology is the use of "big bags” containing typically one tonne of powder instead of the 56 lbs bags which have been common place for some considerable time. These big bags are conventionally loaded into appropriate hoppers and the present invention may be employed in handling them by using the noise generated signal to operate the vibrator for the purpose of fluidising powder at least in the delivery duct from the hopper to the mixing vessel.
  • material delivery will be under the control of a more complex circuit including load cells and a micro-processor together with the control valves, so that a required quantity of powder can be weighed out into the duct and delivered in suitable increments to the mixing vessel at intervals dictated by the mixing rate, which is likely to vary during the course of the mixing operation, but with detected noise as the controlling factor.
  • Tnus in a preferred operational cycle, noise variation between upper and lower thresholds has no effect on agitator position and the powder control valves remain closed. A rise in noise level above the upper of these thresholds will cause a powder increment aamission which may result in a fall in noise level below the lower threshold, and the rotor will then be raised, and so on.
  • the two valves can be used sequentially to weigh increments, that is, the upper valve 40 can be opened whilst the lower is closed, to prepare an increment for later addition. Successive increments may possibly be from different powder sources and of different quantities, e.g. to cause different combination of pigments to produce specific paint shades.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Silicon Compounds (AREA)
  • Accessories For Mixers (AREA)
  • Coating Apparatus (AREA)
  • Paints Or Removers (AREA)
EP83306053A 1982-11-11 1983-10-06 Appareil de production de mélanges, de dispersions et similaires Expired EP0109168B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83306053T ATE40531T1 (de) 1982-11-11 1983-10-06 Vorrichtung fuer die herstellung von mischungen, dispersionen und dergleichen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8232190 1982-11-11
GB8232190 1982-11-11

Publications (3)

Publication Number Publication Date
EP0109168A2 true EP0109168A2 (fr) 1984-05-23
EP0109168A3 EP0109168A3 (en) 1986-08-13
EP0109168B1 EP0109168B1 (fr) 1989-02-01

Family

ID=10534186

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83306053A Expired EP0109168B1 (fr) 1982-11-11 1983-10-06 Appareil de production de mélanges, de dispersions et similaires

Country Status (3)

Country Link
EP (1) EP0109168B1 (fr)
AT (1) ATE40531T1 (fr)
DE (1) DE3379102D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114146619A (zh) * 2021-09-16 2022-03-08 深圳嘉德高新材料有限公司 水性涂料用消泡剂的制备工艺

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3050264A (en) * 1959-07-17 1962-08-21 Vernie W Marcyes Sound actuated control system for ball mill and the like
DE2420138A1 (de) * 1974-04-25 1975-11-06 Johann Nagy Mischeinrichtung
GB2002246B (en) * 1977-08-12 1982-01-13 Mastermix Eng Co Ltd Apparatus for the production of mixtures dispersions and the like

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114146619A (zh) * 2021-09-16 2022-03-08 深圳嘉德高新材料有限公司 水性涂料用消泡剂的制备工艺
CN114146619B (zh) * 2021-09-16 2022-06-28 深圳嘉德高新材料有限公司 水性涂料用消泡剂的制备工艺

Also Published As

Publication number Publication date
ATE40531T1 (de) 1989-02-15
DE3379102D1 (en) 1989-03-09
EP0109168A3 (en) 1986-08-13
EP0109168B1 (fr) 1989-02-01

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