FR2438252A1 - Procede, appareil et dispositif pour mesurer les variations de l'epaisseur d'une feuille en matiere plastique - Google Patents

Procede, appareil et dispositif pour mesurer les variations de l'epaisseur d'une feuille en matiere plastique

Info

Publication number
FR2438252A1
FR2438252A1 FR7924377A FR7924377A FR2438252A1 FR 2438252 A1 FR2438252 A1 FR 2438252A1 FR 7924377 A FR7924377 A FR 7924377A FR 7924377 A FR7924377 A FR 7924377A FR 2438252 A1 FR2438252 A1 FR 2438252A1
Authority
FR
France
Prior art keywords
thickness
contact
frequency
plastic sheet
oscillator
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
FR7924377A
Other languages
English (en)
Other versions
FR2438252B3 (fr
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.)
Winzen International Inc
Original Assignee
Winzen International Inc
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 Winzen International Inc filed Critical Winzen International Inc
Publication of FR2438252A1 publication Critical patent/FR2438252A1/fr
Application granted granted Critical
Publication of FR2438252B3 publication Critical patent/FR2438252B3/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
    • G01B7/08—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using capacitive means
    • G01B7/087—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using capacitive means for measuring of objects while moving
    • 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
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • 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
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
    • G01D18/002—Automatic recalibration
    • G01D18/006—Intermittent recalibration
    • 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
    • B29C2948/92114—Dimensions
    • B29C2948/92152—Thickness
    • 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
    • B29C2948/92238—Electrical properties
    • 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
    • B29C2948/92447—Moulded article

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

LA PRESENTE INVENTION CONCERNE UN PROCEDE, UN DISPOSITIF ET UN APPAREIL POUR LA MESURE DE L'EPAISSEUR D'UN CORPS DIELECTRIQUE. SELON L'INVENTION UN DETECTEUR CAPACITIF EST MIS EN CONTACT AVEC LE CORPS ELECTRIQUE ET DEPLACE EN DIRECTION TRANSVERSALE A CELUI-CI; LE DETECTEUR, QUI COMPREND UNE ELECTRODE EN CONTACT AVEC LA FEUILLE, DETERMINE LA FREQUENCE D'UN OSCILLATEUR DONT LE SIGNAL EST COMPARE AVEC UNE FREQUENCE DE REFERENCE POUR OBTENIR UN SIGNAL PROPORTIONNEL A L'EPAISSEUR DU CORPS DIELECTRIQUE; LE SECOND OSCILLATEUR EST PERIODIQUEMENT RECALIBRE EN COMPARANT SA FREQUENCE A CELLE DU PREMIER OSCILLATEUR, QUAND CELUI-CI EST HORS DE CONTACT AVEC LA MATIERE DIELECTRIQUE, ET EN AJUSTANT LA FREQUENCE SI NECESSAIRE. LE DETECTEUR CAPACITIF COMPREND UN BOITIER CREUX MUNI, DANS UNE SURFACE DESTINEE A ETRE EN CONTACT AVEC LA MATIERE DIELECTRIQUE, D'UNE FENTE DANS LAQUELLE EST MONTEE LADITE ELECTRODE DANS LE MEME PLAN QUE LADITE SURFACE. L'INVENTION EST PARTICULIEREMENT UTILE POUR LA MESURE DE L'EPAISSEUR DE FEUILLE EN MATIERE PLASTIQUE.
FR7924377A 1978-10-03 1979-10-01 Procede, appareil et dispositif pour mesurer les variations de l'epaisseur d'une feuille en matiere plastique Granted FR2438252A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US94675178A 1978-10-03 1978-10-03

Publications (2)

Publication Number Publication Date
FR2438252A1 true FR2438252A1 (fr) 1980-04-30
FR2438252B3 FR2438252B3 (fr) 1981-08-14

Family

ID=25484941

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7924377A Granted FR2438252A1 (fr) 1978-10-03 1979-10-01 Procede, appareil et dispositif pour mesurer les variations de l'epaisseur d'une feuille en matiere plastique

Country Status (7)

Country Link
JP (1) JPS5550102A (fr)
BE (1) BE879123A (fr)
DE (1) DE2939739A1 (fr)
FR (1) FR2438252A1 (fr)
GB (1) GB2038483B (fr)
IT (1) IT1123410B (fr)
NL (1) NL7907279A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0223198A3 (en) * 1985-11-12 1988-09-21 Somar Corporation Film peeling apparatus having film end detector
EP0289212A1 (fr) * 1987-04-22 1988-11-02 Watkiss Automation Limited Détecteur

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3714615A1 (de) * 1987-05-01 1988-11-17 Bwg Bergwerk Walzwerk Vorrichtung zum erfassen zumindest der querkruemmung von bandbehandlungsanlagen durchlaufenden metallbaendern
US4947131A (en) * 1989-04-21 1990-08-07 Modern Controls, Inc. Capacitance bar sensor
US5030918A (en) * 1989-11-17 1991-07-09 Modern Controls, Inc. Portable gauge for measuring thickness variations of thin plastic film
DE4009982C2 (de) * 1990-03-28 2000-11-02 Windmoeller & Hoelscher Verfahren zur Messung der Dicke noch warmer extrudierter Folien aus thermoplastischem Kunststoff
DE4323091A1 (de) * 1993-07-10 1995-01-12 Heidelberger Druckmasch Ag Anordnung zur Kontrolle der Lage einer Bogenkante auf einer Bogentransporttrommel
DE4431934B4 (de) * 1994-09-08 2006-04-27 Heidelberger Druckmaschinen Ag Berührungsfreie Doppelbogenkontrolleinrichtung
DE19732281C2 (de) * 1997-07-26 1999-09-16 Roehm Gmbh Vorrichtung zur Messung der mittleren Stegdicken von Stegmehrfachplatten
EP1182423B1 (fr) * 2000-08-24 2004-01-07 Plast-Control Gerätebau GmbH Palpeur pour mesurer capacitevement l'épaisseur de feuilles
EP1205293B1 (fr) * 2000-11-10 2006-07-12 Plast-Control Gerätebau GmbH Procédés pour mesurer l'épaisseur de films multicouches

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0223198A3 (en) * 1985-11-12 1988-09-21 Somar Corporation Film peeling apparatus having film end detector
EP0289212A1 (fr) * 1987-04-22 1988-11-02 Watkiss Automation Limited Détecteur

Also Published As

Publication number Publication date
FR2438252B3 (fr) 1981-08-14
BE879123A (fr) 1980-02-01
GB2038483A (en) 1980-07-23
DE2939739A1 (de) 1980-04-17
NL7907279A (nl) 1980-04-09
IT1123410B (it) 1986-04-30
JPS5550102A (en) 1980-04-11
GB2038483B (en) 1983-07-20
IT7926182A0 (it) 1979-10-02

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