WO1997032200A1 - Procede de controle d'un systeme disperse, pour la detection d'impuretes non dispersees, et dispositif pour la mise en oeuvre de ce procede - Google Patents

Procede de controle d'un systeme disperse, pour la detection d'impuretes non dispersees, et dispositif pour la mise en oeuvre de ce procede Download PDF

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Publication number
WO1997032200A1
WO1997032200A1 PCT/CH1997/000064 CH9700064W WO9732200A1 WO 1997032200 A1 WO1997032200 A1 WO 1997032200A1 CH 9700064 W CH9700064 W CH 9700064W WO 9732200 A1 WO9732200 A1 WO 9732200A1
Authority
WO
WIPO (PCT)
Prior art keywords
band
impurities
disperse system
detected
control
Prior art date
Application number
PCT/CH1997/000064
Other languages
German (de)
English (en)
Inventor
Fredi Stucki
Original Assignee
Borealis A/S
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 Borealis A/S filed Critical Borealis A/S
Priority to EP97904326A priority Critical patent/EP0883800A1/fr
Priority to JP9530487A priority patent/JP2000505552A/ja
Priority to AU17156/97A priority patent/AU1715697A/en
Publication of WO1997032200A1 publication Critical patent/WO1997032200A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
    • G01N23/18—Investigating the presence of flaws defects or foreign matter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
    • G01N23/083—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption the radiation being X-rays
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
    • G01N23/16—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption the material being a moving sheet or film
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92228—Content, e.g. percentage of humidity, volatiles, contaminants or degassing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92295—Errors or malfunctioning, e.g. for quality control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92438—Conveying, transporting or storage of articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92723—Content, e.g. percentage of humidity, volatiles, contaminants or degassing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9279—Errors or malfunctioning, e.g. for quality control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92933—Conveying, transporting or storage of articles

Definitions

  • the invention is based on a method for monitoring a disperse system for non-dispersed impurities according to the preamble of claim 1.
  • the invention also relates to a device for performing the method.
  • these inhomogeneities are deposited as defects at the boundary layer with the dielectric during the manufacture of the cables, they can significantly distort the electrical field of the cable locally.
  • these impurities can also contain water-soluble ions. So if there is another in the cable If there is unavoidable residual moisture, these ions can diffuse into the cable insulation and significantly reduce the properties of the cable.
  • the invention relates to a prior art as described in an article by A.A. Farkas et al. "High Performance semi-conductive compounds testing, production and experience", Jicable 91, 3rd International Conference on Polymer Insulated Power Cables, pages 8-11, 24-28 June 1991, Paris, France.
  • a method described in this prior art for monitoring a disperse system of conductive carbon black and polyethylene used in a cable as a semiconducting layer for undispersed impurities a part of the disperse system is extruded into a band, the band is examined for impurities, and only afterwards the disperse System processed.
  • the tape contains a lot of soot and is therefore impermeable.
  • only the surface of the belt is examined for undispersed impurities. Impurities inside the belt cannot be detected.
  • the invention is based on the object of developing the method according to the prior art in such a way that it can also detect undispersed impurities present inside the belt with greater certainty, and at the same time specify a device which can be used in is simply suitable for carrying out this method.
  • the method according to the invention is characterized in particular by the fact that it can continuously detect and display the contaminants distributed on the surface and inside the belt. It is particularly advantageous here that the method works independently of the optical properties of the tape and is able to analyze tapes which are also opaque without problems for trapped impurities.
  • the type, number, size, shape and / or distribution of the included impurities can serve as selection criteria for the degree of impurities.
  • the device for carrying out the method according to the invention enables reliable, continuous and / or step-by-step monitoring of the strip and at the same time can control processes in which the disperse system represented by the strip is further processed, for example by extrusion during cable production .
  • FIG. 2 shows an enlargement of an area shown with a border in the device according to FIG. 1, and
  • Sample images of which the upper image relates to a sample that is free of contaminants and the lower image of a sample in which contaminants are stored.
  • 1 denotes a storage kettle, which is used for the intermediate storage of a disperse system.
  • the disperse system is produced by mixing 10 to 50 percent by volume of an electrically conductive or electrically semiconductive powder, such as, in particular, a carbon black with particle sizes smaller than 0.1 ⁇ m, with a polymer, such as, in particular, polyethylene been.
  • the supply boiler can be connected via a controllable switchover valve 2 to an extruder 3 which is used to produce a high or medium voltage cable.
  • the storage boiler 1 is fed by a transport line 4. A small part of the disperse system led through the transport line 4 is continuously discharged through a by-pass line 5 and fed to a test extruder 6.
  • the test extruder 6 produces a test tape 7 of typically 0.2 to 1 mm thick and typically 10 mm bandwidth from the branched-off part of the disperse system. This test tape is opaque since it contains soot in a finely divided form and in a high concentration.
  • the test tape 7 is fed to a measuring head 8 of a device 9 for monitoring the test tape 7 (and thus also the disperse system) for undispersed impurities.
  • the output of the sensor 8 is connected to an evaluation and control device 10.
  • a signal output 11 of the evaluation and control device 10 acts on the controllable changeover valve 2.
  • the transducer 8 has a radiation-protected housing 12 with two narrow openings on the opposite sides of the housing for the passage of the band 7. Each is arranged in the housing 12 on opposite sides of the band a tube 13 for generating soft X-rays (operating voltage of the X-ray tube 13 between 1 and 50 kV) and an X-ray-sensitive image recognition device 14 with a raster 15, a computer-controlled (CCD) camera or a film.
  • X-ray-sensitive image recognition device 14 with a raster 15, a computer-controlled (CCD) camera or a film.
  • Information about the type, the number, the size, the shape and / or the distribution of undesirable impurities inside and on the surface of the test tape 7 and therefore also in the disperse system for further processing in the storage kettle 1 are determined by the measuring sensor 8 and this information is passed on to the evaluation and control device 10.
  • areas of the test tape 7 of, for example, 1 cm 2 are irradiated transversely to the tape plane with soft X-ray radiation.
  • the radiation emerging from the strip can be detected step by step, for example with a film, or else continuously, for example with the raster 15 or a CCD camera.
  • the radiation emerging from the irradiated areas is more strongly absorbed by an impurity 16, typically originating from a grain of sand or another inorganic particle, than at the impurity-free, remaining part of the irradiated band area, which predominantly contains organic substances.
  • a silhouette 17 is therefore generated on the grid 15.
  • the silhouette 17 is detected by adjacent raster points - as indicated in the figure, for example by 2 raster points - and this information is forwarded to the evaluation and control device 10 in the form of electrical signals.
  • all impurities present on the surface and inside the test tape 7 can be detected with a resolution higher than 10 ⁇ m.
  • the supplied electrical signals can be compared with reference signals in the evaluation and control device 10. When a threshold value is exceeded, the evaluation and control device 10 then emits a negative status signal that characterizes the contamination state of the belt 7. This negative status signal is fed via the signal output 11 to a control or regulating element of a device which further processes the disperse system, such as, in particular, the changeover valve 2, and then causes it to be actuated, such as in particular closing the connection to the extruder 3.
  • output signals are advantageously formed in the control and evaluation device 10, which are proportional to the type, number, size, shape and / or distribution of the contaminants. These signals can be extremely valuable when looking for sources of error and at the same time enable particularly simple input of the reference signals requested for the threshold value comparison.
  • the upper picture relates to an area of the test tape 7 which is free of impurities.
  • the diffuse spots of low contrast and typically 60 ⁇ m in diameter that can be seen in the picture come from soot agglomerates.
  • the lower image relates to an area of the test tape 7 in which coarse impurities are stored.
  • These impurities are grains of sand or other inorganic particles, such as metal chips, and have reached the disperse system via the starting components, when the starting components are mixed, or in another manufacturing step.
  • the contaminants lead to a considerably greater contrast than the diffuse spots and have diameters in the millimeter range. Contrast and diameter size can therefore be used as particularly simple criteria when comparing the contamination-free area (upper picture) and the contaminated area of the test tape 7.

Abstract

L'invention concerne un procédé destiné à contrôler un système dispersé, en vue de détecter la présence d'impuretés non dispersées (16), avant sa transformation en un produit fini. Selon ce procédé, une partie du système dispersé est extrudée avant d'être transformée en une bande (7), et les impuretés sont détectées dans cette bande. A cet effet, de petites zones de la bande (7) sont irradiées aux rayons X mous, en continu ou par intermittence, perpendiculairement au plan de la bande. Le rayonnement X émergeant des zones irradiées de la bande est ensuite détecté par zones. A partir du rayonnement détecté, on détermine la nature, le nombre, les dimensions, la forme et/ou la distribution des impuretés (16). Il est particulièrement avantageux, en raison de l'irradiation à travers la bande (7), que les impuretés soient détectées aussi bien à l'intérieur qu'à la surface de la bande. Si les impuretés (16) dépassent une valeur seuil prédéterminée, le système dispersé est refusé et toute transformation ultérieure est interrompue.
PCT/CH1997/000064 1996-02-29 1997-02-21 Procede de controle d'un systeme disperse, pour la detection d'impuretes non dispersees, et dispositif pour la mise en oeuvre de ce procede WO1997032200A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP97904326A EP0883800A1 (fr) 1996-02-29 1997-02-21 Procede de controle d'un systeme disperse, pour la detection d'impuretes non dispersees, et dispositif pour la mise en oeuvre de ce procede
JP9530487A JP2000505552A (ja) 1996-02-29 1997-02-21 分散されていない不純物のための分散系を監視する方法およびこの方法を実施するための装置
AU17156/97A AU1715697A (en) 1996-02-29 1997-02-21 Process for monitoring a disperse system for non-dispersed impurities and devi ce for carrying out said process

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19607582A DE19607582A1 (de) 1996-02-29 1996-02-29 Verfahren zur Überwachung eines dispersen Systems auf nichtdispergierte Verunreinigungen und Vorrichtung zur Durchführung dieses Verfahrens
DE19607582.3 1996-02-29

Publications (1)

Publication Number Publication Date
WO1997032200A1 true WO1997032200A1 (fr) 1997-09-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1997/000064 WO1997032200A1 (fr) 1996-02-29 1997-02-21 Procede de controle d'un systeme disperse, pour la detection d'impuretes non dispersees, et dispositif pour la mise en oeuvre de ce procede

Country Status (7)

Country Link
EP (1) EP0883800A1 (fr)
JP (1) JP2000505552A (fr)
KR (1) KR19990087358A (fr)
AU (1) AU1715697A (fr)
CA (1) CA2247377A1 (fr)
DE (1) DE19607582A1 (fr)
WO (1) WO1997032200A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1758398A1 (fr) 2005-08-23 2007-02-28 Syneola SA Moyens d'interface pour metadata et utilisateur basés sur une semiotique à plusieurs niveaux et une logique floue pour un système interactif multimédia ayant une capacité d'adaptation par acquisition de connaissances

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006179424A (ja) * 2004-12-24 2006-07-06 Toyota Motor Corp 電池の製造方法
DE102015114658A1 (de) 2015-09-02 2017-03-02 Troester Gmbh & Co. Kg Vorrichtung und Verfahren zur radioskopischen Untersuchung eines streifenförmigen Materials mit einem wesentlichen Bestandteil aus Kautschuk oder Kunststoff

Citations (3)

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Publication number Priority date Publication date Assignee Title
EP0098398A2 (fr) * 1982-07-03 1984-01-18 Kurt Dr. Sauerwein Méthode et dispositif pour le contrôle radiographique des matériaux
GB2227689A (en) * 1989-01-06 1990-08-08 Vactite Ltd Treatment of plastics insulated wire
DE3928279A1 (de) * 1989-08-26 1991-02-28 Truetzschler & Co Verfahren und vorrichtung zum erkennen von stoerenden partikeln, insbesondere trashteilen, nissen, schalennissen, noppen u. dgl., in textilem fasergut, z. b. baumwolle, chemiefasern u. dgl.

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US4289964A (en) * 1980-01-24 1981-09-15 Intec Corporation Radiation inspection system for a material making apparatus and method using a beta ray gauge
DE3325281C2 (de) * 1983-07-13 1985-09-26 Rheinisch-Westfälischer Technischer Überwachungsverein e.V ., 4300 Essen Verfahren und Vorrichtung zur fortlaufenden, zerstörungsfreien Werkstoffprüfung an kontinuierlich bewegtem Bandmaterial

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0098398A2 (fr) * 1982-07-03 1984-01-18 Kurt Dr. Sauerwein Méthode et dispositif pour le contrôle radiographique des matériaux
GB2227689A (en) * 1989-01-06 1990-08-08 Vactite Ltd Treatment of plastics insulated wire
DE3928279A1 (de) * 1989-08-26 1991-02-28 Truetzschler & Co Verfahren und vorrichtung zum erkennen von stoerenden partikeln, insbesondere trashteilen, nissen, schalennissen, noppen u. dgl., in textilem fasergut, z. b. baumwolle, chemiefasern u. dgl.

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
FARKAS A ET AL: "HIGH PERFORMANCE SEMICONDUCTIVE COMPOUNDS TESTING, PRODUCTION AND EXPERIENCE", JICABLE 91, 3RD INTERNATIONAL CONFERENCE ON POLYMER INSULATED POWER CABLES, 1991, pages 8 - 11, XP000647056 *
KOPINECK H -J ET AL: "NEUE ON-LINE-MESS- UND -PRUFVERFAHREN FUR STAHLBANDER", STAHL UND EISEN, no. 23, 20 November 1989 (1989-11-20), pages 19 - 26, 72, XP000085675 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1758398A1 (fr) 2005-08-23 2007-02-28 Syneola SA Moyens d'interface pour metadata et utilisateur basés sur une semiotique à plusieurs niveaux et une logique floue pour un système interactif multimédia ayant une capacité d'adaptation par acquisition de connaissances
US8280827B2 (en) 2005-08-23 2012-10-02 Syneola Luxembourg Sa Multilevel semiotic and fuzzy logic user and metadata interface means for interactive multimedia system having cognitive adaptive capability

Also Published As

Publication number Publication date
DE19607582A1 (de) 1997-09-04
AU1715697A (en) 1997-09-16
JP2000505552A (ja) 2000-05-09
EP0883800A1 (fr) 1998-12-16
CA2247377A1 (fr) 1997-09-04
KR19990087358A (ko) 1999-12-27

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