EP0577950B1 - Méthode pour l'inspection du volume de bouteilles en matière plastique et machine mettant en oeuvre cette méthode - Google Patents

Méthode pour l'inspection du volume de bouteilles en matière plastique et machine mettant en oeuvre cette méthode Download PDF

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Publication number
EP0577950B1
EP0577950B1 EP93107540A EP93107540A EP0577950B1 EP 0577950 B1 EP0577950 B1 EP 0577950B1 EP 93107540 A EP93107540 A EP 93107540A EP 93107540 A EP93107540 A EP 93107540A EP 0577950 B1 EP0577950 B1 EP 0577950B1
Authority
EP
European Patent Office
Prior art keywords
bottle
volume
height
detected
linear dimension
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 - Lifetime
Application number
EP93107540A
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German (de)
English (en)
Other versions
EP0577950A1 (fr
Inventor
Kurt Marinics
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.)
Elpatronic AG
Original Assignee
Elpatronic AG
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Filing date
Publication date
Application filed by Elpatronic AG filed Critical Elpatronic AG
Publication of EP0577950A1 publication Critical patent/EP0577950A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/04—Sorting according to size
    • B07C5/12—Sorting according to size characterised by the application to particular articles, not otherwise provided for
    • B07C5/122—Sorting according to size characterised by the application to particular articles, not otherwise provided for for bottles, ampoules, jars and other glassware
    • B07C5/126—Sorting according to size characterised by the application to particular articles, not otherwise provided for for bottles, ampoules, jars and other glassware by means of photo-electric sensors, e.g. according to colour

Definitions

  • the invention relates to a method for inspecting a reusable plastic bottle, in particular a PET bottle, with regard to its volume.
  • the invention further relates to a bottle inspection machine for carrying out the method and the use of the result of the height measurement of such bottles in an inspection machine for determining the volume of the bottles.
  • the volume of the bottle can be determined with sufficient accuracy by determining a linear bottle dimension.
  • the determination of a linear dimension is very simple even at high speed in an inspection machine promoted bottles possible.
  • the height of the bottle is preferably determined. It has been found in PET bottles that they decrease in height in particular, which mainly results in a reduction in volume. The height dimension is also particularly easy to determine, as will be explained below.
  • the bottle inspection machine according to the invention is equipped with a measuring arrangement for the linear dimension.
  • Figure is a schematic representation of the measuring arrangement for the height measurement of a bottle
  • FIG. 1 only the head area 2 of a PET bottle 1 is shown.
  • a transmitter 4 emits a band-shaped laser beam 5, which is received in a receiver 6.
  • Corresponding transmit / receive arrangements with associated receiver amplifiers are e.g. manufactured under the type designation LX2 by Keyence, Osaka, Japan.
  • the receiver amplifier can e.g. indicate the exceeding or falling below a certain limit of the amount of laser light received, or it emits an analog voltage which is proportional to the amount of light received and which voltage can be processed.
  • the amount of light received in the arrangement shown depends on the height of the bottle, since its upper edge 3 blocks the band-shaped laser light beam from its underside. The greater the height of the bottle, the further it protrudes into the light band, or the smaller the amount of light received. If the bottle is lower, it projects less into the light band and the amount of light received is greater.
  • the bottle height can be determined in this way with an accuracy of approx. 0.1 mm. Because height and Correlating the volume of PET bottles of a given shape very precisely, that is, from the height of the bottle, the volume of which can be inferred with good accuracy, the described height measurement provides a simple and rapid possibility of volume inspection.
  • the bottle height falls below a predetermined lower limit (corresponding to an upper limit for the amount of light received), since it is usually only of interest that the inspection falls below a target volume.
  • a predetermined lower limit corresponding to an upper limit for the amount of light received
  • another linear dimension can also be determined on a case-by-case basis, which correlates with the bottle type to be tested with sufficient accuracy. For example, the height from the bottom of the collar 3 can be determined, or the bottle diameter can be determined if this is suitable as a measure of the volume change for a specific bottle type.
  • the bottle stands on a floor or is conveyed with it, the distance to the measuring arrangement 4, 5, 6 being known and fixed.
  • a conveyor in an inspection machine e.g. a carousel conveyor or a conveyor belt usually accepted. If the measurement is made while the position of the bottle is not so precisely defined, e.g. two measuring arrangements are provided, one measuring arrangement measuring the upper edge of the bottle, as shown in FIG. 1, and the other measuring arrangement measuring the lower edge of the bottle.
  • the height of the bottle or compliance with its target volume can then be determined from the two light quantities or output signals of the measuring arrangements.
  • the described determination of the linear bottle dimension is preferably carried out in an inspection machine.
  • the measuring arrangement can be arranged along the conveyor path in a variety of ways. It can Several measuring arrangements can also be provided for the independent testing of several bottles. If, in an inspection machine, a height measurement of the bottle should already be provided with sufficient accuracy for a reason other than the volume determination, the measurement result according to the invention can be used for volume inspection.
  • the linear dimension can also be determined separately from an inspection machine along the bottle conveyor path, e.g. in a filling station.
  • An ejection device is preferably connected downstream of the height or volume determination, which responds to the result of the determination and ejects bottles that have been found to be too small from the conveying path and thus from the reusable circulation.

Landscapes

  • Length Measuring Devices By Optical Means (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Claims (10)

  1. Procédé pour inspecter le volume d'une bouteille réutilisable en matière plastique, notamment une bouteille en polyéthylène, caractérisé en ce qu'on détermine tout d'abord, pour le type considéré de la bouteille réutilisable en matière plastique, la corrélation entre au moins une dimension linéaire sélectionnée de la bouteille et son volume, que, lors de l'inspection, on détermine respectivement cette dimension linéaire de la bouteille et qu'ensuite on décide à partir de cette dimension si le volume de consigne de la bouteille est respecté.
  2. Procédé selon la revendication 1, caractérisé en ce qu'on détermine la hauteur de la bouteille.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que l'on compare la dimension linéaire déterminée a une valeur de consigne, et qu'on supprime la bouteille pour une réutilisation, lorsque la dimension tombe au-dessous de cette valeur de consigne.
  4. Procédé selon l'une des revendications 1-3, caractérisé en ce qu'on détermine la dimension linéaire à l'aide d'un procédé de mesure optique.
  5. Procédé selon la revendication 4, caractérisé en ce qu'on fait passer la bouteille en partie à travers un faisceau laser élargi, dont l'affaiblissement par la partie de la bouteille, qui traverse le faisceau, est déterminé et est utilisé en tant que mesure de la dimension linéaire.
  6. Procédé selon les revendications 2 et 5, caractérisé en ce qu'on déplace le bord supérieur de la bouteille à partir du bas dans une bande de lumière laser élargie verticalement, de manière à déterminer la hauteur de la bouteille.
  7. Machine d'inspection de bouteilles pour inspecter une bouteille réutilisable en matière plastique, notamment une bouteille en polyéthylène, dans laquelle on détermine tout d'abord, pour le type considéré de la bouteille réutilisable en matière plastique, la corrélation entre au moins une dimension linéaire sélectionnée de la bouteille et son volume, et comportant un dispositif d'entraînement, qui entraîne les bouteilles dans la machine d'inspection, caractérisée en ce qu'en au moins à un emplacement le long du trajet d'entraînement est prévu au moins un dispositif de mesure, à l'aide duquel cette dimension linéaire de la bouteille, qui passe respectivement devant ce dispositif, peut être déterminée et que des moyens sont prévus pour décider, à partir de cette dimension, si le volume de consigne de la bouteille considérée est respecté.
  8. Machine d'inspection de bouteilles selon la revendication 7, caractérisée en ce que le dispositif de mesure comprend un émetteur de lumière laser, qui produit un faisceau laser élargi en forme de bande, un récepteur de lumière laser distant de cet émetteur et un circuit d'exploitation pour déterminer l'affaiblissement du faisceau laser par la bouteille qui est déplacée à travers le faisceau laser entre l'émetteur et le récepteur.
  9. Machine d'inspection de bouteilles selon la revendication 8, caractérisée en ce que la machine d'inspection comprend un dispositif d'exploitation, qui coopère avec le circuit d'exploitation pour écarter des bouteilles, qui ne satisfont pas à la dimension linéaire de consigne.
  10. Utilisation du résultat de la mesure de hauteur de bouteilles réutilisables en matière plastique, notamment de bouteilles en polyéthylène dans une machine d'inspection pour déterminer le volume de la bouteille, caractérisée en ce qu'on détermine tout d'abord pour le type considéré de la bouteille réutilisable en matière plastique, la corrélation entre la hauteur de la bouteille et son volume, et qu'ensuite on décide du volume à partir de la hauteur respectivement mesurée.
EP93107540A 1992-07-07 1993-05-10 Méthode pour l'inspection du volume de bouteilles en matière plastique et machine mettant en oeuvre cette méthode Expired - Lifetime EP0577950B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2141/92 1992-07-07
CH214192 1992-07-07

Publications (2)

Publication Number Publication Date
EP0577950A1 EP0577950A1 (fr) 1994-01-12
EP0577950B1 true EP0577950B1 (fr) 1997-04-16

Family

ID=4226834

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93107540A Expired - Lifetime EP0577950B1 (fr) 1992-07-07 1993-05-10 Méthode pour l'inspection du volume de bouteilles en matière plastique et machine mettant en oeuvre cette méthode

Country Status (10)

Country Link
EP (1) EP0577950B1 (fr)
JP (1) JPH06194205A (fr)
AR (1) AR247629A1 (fr)
AT (1) ATE151671T1 (fr)
BR (1) BR9302771A (fr)
CA (1) CA2099959A1 (fr)
DE (1) DE59306157D1 (fr)
DK (1) DK0577950T3 (fr)
MX (1) MX9304046A (fr)
NO (1) NO932459L (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800011042A1 (it) * 2018-12-12 2020-06-12 Arol Spa Procedimento e apparecchiatura per il rilevamento della posizione di oggetti su un nastro trasportatore

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS521676B2 (fr) * 1971-09-14 1977-01-17
SE7308776L (fr) * 1973-06-21 1974-12-23 Platmanufaktur Ab
FR2346681A1 (fr) * 1976-04-02 1977-10-28 Tourres Francois Dispositif de controle optique du profil d'un objet, utilisant un faisceau laser plan
JPS5366386A (en) * 1976-11-26 1978-06-13 Hitachi Ltd Mechanical to electrical converter consisting of semiconductor
FR2544855B1 (fr) * 1983-04-20 1986-02-21 Snecma Procede et dispositif de mesure de precision de la hauteur des aubes d'un rotor
DE3314577A1 (de) * 1983-04-22 1984-10-25 Pierburg Gmbh & Co Kg, 4040 Neuss Verfahren zur messung einer laengenabweichung vom vorgegebenen sollwert
US4906098A (en) * 1988-05-09 1990-03-06 Glass Technology Development Corporation Optical profile measuring apparatus

Also Published As

Publication number Publication date
DE59306157D1 (de) 1997-05-22
NO932459L (no) 1994-01-10
DK0577950T3 (da) 1997-10-27
NO932459D0 (no) 1993-07-06
ATE151671T1 (de) 1997-05-15
JPH06194205A (ja) 1994-07-15
EP0577950A1 (fr) 1994-01-12
BR9302771A (pt) 1994-02-08
MX9304046A (es) 1994-02-28
CA2099959A1 (fr) 1994-01-08
AR247629A1 (es) 1995-01-31

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