EP0407927A2 - Procédé pour déterminer continuellement la couleur de granulés colorés en plastique - Google Patents

Procédé pour déterminer continuellement la couleur de granulés colorés en plastique Download PDF

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Publication number
EP0407927A2
EP0407927A2 EP90113038A EP90113038A EP0407927A2 EP 0407927 A2 EP0407927 A2 EP 0407927A2 EP 90113038 A EP90113038 A EP 90113038A EP 90113038 A EP90113038 A EP 90113038A EP 0407927 A2 EP0407927 A2 EP 0407927A2
Authority
EP
European Patent Office
Prior art keywords
measuring
plastic
pigment
light source
color
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
EP90113038A
Other languages
German (de)
English (en)
Other versions
EP0407927B1 (fr
EP0407927A3 (en
Inventor
Detlef Klaus Busch
Horst Grohmann
Harald Kutzner
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.)
Hoechst AG
Original Assignee
Hoechst AG
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Filing date
Publication date
Application filed by Hoechst AG filed Critical Hoechst AG
Publication of EP0407927A2 publication Critical patent/EP0407927A2/fr
Publication of EP0407927A3 publication Critical patent/EP0407927A3/de
Application granted granted Critical
Publication of EP0407927B1 publication Critical patent/EP0407927B1/fr
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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
    • 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
    • B01F35/2131—Colour or luminescence
    • 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
    • B01F35/22—Control or regulation
    • B01F35/2201—Control or regulation characterised by the type of control technique used
    • B01F35/2202—Controlling the mixing process by feed-back, i.e. a measured parameter of the mixture is measured, compared with the set-value and the feed values are corrected
    • 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
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • B01F35/82—Forming a predetermined ratio of the substances to be mixed by adding a material to be mixed to a mixture in response to a detected feature, e.g. density, radioactivity, consumed power or colour
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/60—Mixing solids with solids

Definitions

  • the invention relates to a method for producing a colored plastic molding compound, in which the color of the molding compound is measured continuously and the measurement signals are used indirectly to regulate the mixing ratio of plastic and color pigment.
  • a mixture of polymer and pigment In the known process for producing colored plastic granules, a mixture of polymer and pigment, the latter mostly in the form of a concentrate, and, if appropriate, auxiliaries, is introduced into the granulating system and processed into granules. Samples are taken from the granules and formed into test specimens on which the color tone is assessed visually or colorimetrically. If necessary, the mixing ratio of polymer to pigment is then changed. This change is made until the color of the granules matches the intended color.
  • the invention thus relates to a process for producing a colored plastic molding compound by mixing at least one pigment into the plastic, characterized in that samples are taken continuously from the dry colored molding compound and passed past a light source, in the light reflected by the surface of the molding compound particles the colors green, blue and red are measured and the measurement signals are converted into control signals for controlling the metering devices for the pigment and the plastic.
  • the invention further relates to a method for continuously measuring the hue of a colored plastic molding composition by illuminating the surface of the molding compound particles with a light source and measuring the colors green, blue and red in the light reflected from the surface of the molding compound particles, characterized in that the molding compound particles in a tight packing by the measuring device at the measuring window.
  • the invention relates to the device for the continuous measurement of the color of a colored plastic molding composition consisting of a storage container (61), a measuring tube (62) adjoining it, into which a glass measuring window (63) is embedded, a light source (64) outside the tube (62) in front of the measuring window (63) and a sensor group (66).
  • Light source (64) and sensor group (66) can be arranged side by side. They are preferably combined by introducing light into an optical waveguide bundle (67) and continuing the reflected light. In this case, the light source (64) and sensor group (66) are in a separate housing.
  • samples are continuously taken from the stream of dry colored material behind the mixing plant.
  • the molding compound can have been obtained by various processes, it is essential that it is dry on the surface and cannot form condensation water during the measurement.
  • Sampling can be carried out fully continuously by branching off a small part of the material flow, but it can also be carried out continuously at intervals. Samples are preferably taken from the material flow at regular time intervals, for example by suction.
  • the material sampler is conveyed from the sampler to the storage container of the measuring device.
  • the measuring device consists of a tube with a round or angular cross-section, in the wall of which a window closed with a glass plate is attached. At one end the tube is designed as a storage container, at the other end it is connected to a device which empties the tube evenly and at the same time forms a barrier against vapors or gases that may come from the main flow of the molding compound.
  • a cellular wheel sluice is advantageously used.
  • a light source with an almost constant color temperature, for example one Halogen lamp attached. It illuminates the molding compound particles in the tube. The light reflected by the particles is picked up by three sensors that are sensitive to the colors green, blue or red.
  • the measuring tube Due to the interaction of the storage container and the emptying device, the measuring tube is always kept full and the molding compound particles are packed tightly. This is essential for the evaluation of the measurement signals from the probes.
  • the changes in the moving molding compound surface are averaged out by constant averaging over the individual measurement signals in a computing and control unit.
  • This "constant mean value” is compared with a calibration mean value, which is available as a target value by measuring and storing a calibration sample from the control. The difference between the setpoint and actual value is used to control the dosing equipment of the mixing plant.
  • the figures show the process according to the invention in a flow chart and the measuring device used for the process in the preferred use for plastic granules.
  • These granules have a round or rectangular cross section, a diameter of 1 to 5 mm and a length of the particles of 0.5 to 5 mm.
  • a constant stream (2) of dry colored granulate flows out of the granulating system (1).
  • the sampler (3) regularly takes samples through line (4) and conveys them through line (5) into the measuring device (6), from which they are drawn off by the emptying device (8) through line (7) and through line (9) the granulate stream (2) are fed again.
  • the signals obtained on the measuring device (6) are processed to guide values in the computer (10) and the dosing control device (11).
  • the control signals determined in the control device (11) are transmitted to the pelletizing system (1) via the lines (12) and (13).
  • FIG. 2 shows a measuring device in a preferred form.
  • the sampler (3), a suction fan and the emptying device (8), a cellular wheel sluice, are attached directly to the measuring device (6).
  • Lines (5) and (7) are thus omitted and line (4) ends directly in the storage container (61) of the measuring device (6).
  • a light source (64) illuminates the surface of the granules (65) being passed through the optical fiber bundle (67).
  • the reflected light is collected by the sensor group (66) and given separately to the computer (10) (not shown) according to the proportions of the colors green, blue and red as electrical signals.
  • Correct color measurement on the granulate is strongly dependent on the speed at which the granulate flows past the measurement window.
  • the minimum speed was 1 cm / sec.
  • the color temperature consistency of the halogen lamp is guaranteed with a corresponding brightness control that adjusts the lamp voltage (in this case approx. 6V).
  • the output voltage range of the three color sensors is 0 ... 10V each.
  • the signals are digitized in an A / D converter (12bit), smoothed by averaging and fed to the granule brightness calculation. This means that 4 values are available for color determination; 3 measured values from the selective color frequency measurements and the calculated brightness value. These are compared in a computer with the stored values of the desired granulate color and processed for further processing.
  • a high resolution for the range of the setpoint is necessary in order to recognize even the smallest deviations in the actual value. This is achieved with signal spreading.
  • the voltage signal is ⁇ ⁇ 100 mV.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Dental Preparations (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
EP90113038A 1989-07-12 1990-07-07 Procédé pour déterminer continuellement la couleur de granulés colorés en plastique Expired - Lifetime EP0407927B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3922902 1989-07-12
DE3922902A DE3922902A1 (de) 1989-07-12 1989-07-12 Verfahren zur herstellung einer farbigen kunststoff-formmasse

Publications (3)

Publication Number Publication Date
EP0407927A2 true EP0407927A2 (fr) 1991-01-16
EP0407927A3 EP0407927A3 (en) 1992-07-22
EP0407927B1 EP0407927B1 (fr) 1994-06-15

Family

ID=6384806

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90113038A Expired - Lifetime EP0407927B1 (fr) 1989-07-12 1990-07-07 Procédé pour déterminer continuellement la couleur de granulés colorés en plastique

Country Status (8)

Country Link
EP (1) EP0407927B1 (fr)
JP (1) JPH0345304A (fr)
AT (1) ATE107190T1 (fr)
AU (1) AU644086B2 (fr)
CA (1) CA2020947A1 (fr)
DE (2) DE3922902A1 (fr)
ES (1) ES2056308T3 (fr)
ZA (1) ZA905423B (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0646409A1 (fr) * 1993-10-04 1995-04-05 General Electric Company Système pour contrôler la couleur de polymères mélangés en mesurant la couleur en continu
US5953129A (en) * 1996-07-03 1999-09-14 Basf Aktiengesellschaft Method and a device for the continuous colorimetry of plastics molding compounds
WO1999048602A1 (fr) * 1998-03-26 1999-09-30 Renner Herrmann S.A. Appareil et procede de preparation continue d'un fluide avec ajustement automatique des proprietes dudit fluide
WO2002016892A2 (fr) * 2000-08-22 2002-02-28 General Electric Company Systeme de mesure de couleur en ligne destine a un produit refroidi
DE10219034A1 (de) * 2002-04-29 2003-11-13 Bayer Ag Verfahren und Vorrichtung zur Bestimmung der Farbe von Kunststoffgranulat
WO2009040291A1 (fr) * 2007-09-21 2009-04-02 Basf Se Procédé et dispositif de mesure de propriétés chromatiques de granulats de matière plastique
DE102008013170A1 (de) * 2008-03-07 2009-09-10 Wobben, Aloys Verfahren zum Einstellen eines Mischungsverhältnisses von zwei oder mehr Komponenten
DE102011113543A1 (de) * 2011-09-15 2013-03-21 Klöckner Pentaplast GmbH & Co. KG Gefärbte polymere Formkörper, Verfahren und Vorrichtung zur Herstellung der Formkörper
DE102019217090A1 (de) * 2019-11-06 2021-05-06 LIEB TGA GmbH Mischvorrichtung, Gussvorrichtung und Verfahren zum Betreiben einer Mischvorrichtung
CN113574363A (zh) * 2019-03-26 2021-10-29 科思创知识产权两合公司 测定透明散装材料的颜色值的方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR112021003619B1 (pt) * 2018-08-29 2024-04-30 Erema Engineering Recycling Maschinen Und Anlagen Gesellschaft M.B.H. Método e aparelho para o processamento e/ou reciclagem de materiais
CN113546552A (zh) * 2021-07-27 2021-10-26 北京住总集团有限责任公司 一种泥浆搅拌装置
FR3126321A1 (fr) * 2021-09-01 2023-03-03 L'Air Liquide Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Dispositif de melange continu et procede associe
FR3127281B1 (fr) * 2021-09-23 2023-08-25 Exel Ind Dispositif de mesure de teinte pour un système de distribution de fluide
CN115382461B (zh) * 2022-10-31 2023-05-12 东营市宝泽能源科技有限公司 一种具有配比调节功能的铁离子稳定剂生产装置及方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3224324A (en) * 1962-09-27 1965-12-21 Monsanto Co Method of presentation of compressionable fibrous samples
DE2133797A1 (de) * 1971-07-07 1973-01-25 Hoechst Ag Messung von verfaerbungen an einer stroemenden polymerschmelze
JPS5830641A (ja) * 1981-08-18 1983-02-23 Satake Eng Co Ltd 連続穀粒精白度測定装置
US4403866A (en) * 1982-05-07 1983-09-13 E. I. Du Pont De Nemours And Company Process for making paints
EP0191338A2 (fr) * 1985-02-14 1986-08-20 Werner & Pfleiderer GmbH Procédé et dispositif pour l'alimentation contrôlée de concentrés de couleurs dans des machines à hélices
EP0284090A2 (fr) * 1987-03-27 1988-09-28 Sunstar Engineering Inc. Procédé de contrôle de la qualité d'exécution d'un revêtement de peinture
US4799799A (en) * 1985-02-06 1989-01-24 The United States Of America As Represented By The Secretary Of The Interior Determining inert content in coal dust/rock dust mixture
EP0308741A2 (fr) * 1987-09-22 1989-03-29 BASF Magnetics GmbH Procédé de contrôle du degré de dispersion de pigments magnétiques dans une dispersion

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3224324A (en) * 1962-09-27 1965-12-21 Monsanto Co Method of presentation of compressionable fibrous samples
DE2133797A1 (de) * 1971-07-07 1973-01-25 Hoechst Ag Messung von verfaerbungen an einer stroemenden polymerschmelze
JPS5830641A (ja) * 1981-08-18 1983-02-23 Satake Eng Co Ltd 連続穀粒精白度測定装置
US4403866A (en) * 1982-05-07 1983-09-13 E. I. Du Pont De Nemours And Company Process for making paints
US4799799A (en) * 1985-02-06 1989-01-24 The United States Of America As Represented By The Secretary Of The Interior Determining inert content in coal dust/rock dust mixture
EP0191338A2 (fr) * 1985-02-14 1986-08-20 Werner & Pfleiderer GmbH Procédé et dispositif pour l'alimentation contrôlée de concentrés de couleurs dans des machines à hélices
EP0284090A2 (fr) * 1987-03-27 1988-09-28 Sunstar Engineering Inc. Procédé de contrôle de la qualité d'exécution d'un revêtement de peinture
EP0308741A2 (fr) * 1987-09-22 1989-03-29 BASF Magnetics GmbH Procédé de contrôle du degré de dispersion de pigments magnétiques dans une dispersion

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 7, no. 109 (P-196)[1254], 12. Mai 1983; & JP,A,58 030 641 (SATAKE SEISAKUSHO) 23-02-1983, zusammenfassung. *

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0646409A1 (fr) * 1993-10-04 1995-04-05 General Electric Company Système pour contrôler la couleur de polymères mélangés en mesurant la couleur en continu
US5559173A (en) * 1993-10-04 1996-09-24 General Electric Company System for controlling the color of compounded polymer(s) using in-process color measurements
US5953129A (en) * 1996-07-03 1999-09-14 Basf Aktiengesellschaft Method and a device for the continuous colorimetry of plastics molding compounds
WO1999048602A1 (fr) * 1998-03-26 1999-09-30 Renner Herrmann S.A. Appareil et procede de preparation continue d'un fluide avec ajustement automatique des proprietes dudit fluide
US6533449B1 (en) 1998-03-26 2003-03-18 Renner Herrmann S.A. Apparatus and process for the continuous preparation of a fluid, utilizing a fluid recycling means including a buffer
WO2002016892A2 (fr) * 2000-08-22 2002-02-28 General Electric Company Systeme de mesure de couleur en ligne destine a un produit refroidi
WO2002016892A3 (fr) * 2000-08-22 2002-05-10 Gen Electric Systeme de mesure de couleur en ligne destine a un produit refroidi
US6469789B1 (en) 2000-08-22 2002-10-22 General Electric Company On-line color measurement system for cooled product
DE10219034A1 (de) * 2002-04-29 2003-11-13 Bayer Ag Verfahren und Vorrichtung zur Bestimmung der Farbe von Kunststoffgranulat
DE10219034B4 (de) * 2002-04-29 2004-04-08 Bayer Ag Verfahren und Vorrichtung zur Bestimmung der Farbe von Kunststoffgranulat
WO2009040291A1 (fr) * 2007-09-21 2009-04-02 Basf Se Procédé et dispositif de mesure de propriétés chromatiques de granulats de matière plastique
DE102008013170A1 (de) * 2008-03-07 2009-09-10 Wobben, Aloys Verfahren zum Einstellen eines Mischungsverhältnisses von zwei oder mehr Komponenten
DE102011113543A1 (de) * 2011-09-15 2013-03-21 Klöckner Pentaplast GmbH & Co. KG Gefärbte polymere Formkörper, Verfahren und Vorrichtung zur Herstellung der Formkörper
DE102011113543A8 (de) * 2011-09-15 2013-06-06 Klöckner Pentaplast GmbH & Co. KG Gefärbte polymere Formkörper, Verfahren und Vorrichtung zur Herstellung der Formkörper
CN113574363A (zh) * 2019-03-26 2021-10-29 科思创知识产权两合公司 测定透明散装材料的颜色值的方法
DE102019217090A1 (de) * 2019-11-06 2021-05-06 LIEB TGA GmbH Mischvorrichtung, Gussvorrichtung und Verfahren zum Betreiben einer Mischvorrichtung

Also Published As

Publication number Publication date
CA2020947A1 (fr) 1991-01-13
DE59006110D1 (de) 1994-07-21
EP0407927B1 (fr) 1994-06-15
ATE107190T1 (de) 1994-07-15
AU5887090A (en) 1991-01-17
JPH0345304A (ja) 1991-02-26
ZA905423B (en) 1991-04-24
ES2056308T3 (es) 1994-10-01
AU644086B2 (en) 1993-12-02
DE3922902A1 (de) 1991-01-17
EP0407927A3 (en) 1992-07-22

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