WO2024256101A1 - Dispositif d'inspection de pièces moulées - Google Patents

Dispositif d'inspection de pièces moulées Download PDF

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Publication number
WO2024256101A1
WO2024256101A1 PCT/EP2024/063137 EP2024063137W WO2024256101A1 WO 2024256101 A1 WO2024256101 A1 WO 2024256101A1 EP 2024063137 W EP2024063137 W EP 2024063137W WO 2024256101 A1 WO2024256101 A1 WO 2024256101A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrodes
voltage
beverage
caps
beverage closure
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.)
Pending
Application number
PCT/EP2024/063137
Other languages
German (de)
English (en)
Inventor
Daniel Stern
Bernhard Kubalek
Beat SCHLUP
Hansjörg KLOCK
Matthias Hermle
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.)
Finatec Holding AG
Original Assignee
Finatec Holding AG
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 Finatec Holding AG filed Critical Finatec Holding AG
Priority to CN202480039994.XA priority Critical patent/CN121532644A/zh
Publication of WO2024256101A1 publication Critical patent/WO2024256101A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/60—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrostatic variables, e.g. electrographic flaw testing
    • G01N27/61—Investigating the presence of flaws
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/40—Investigating fluid-tightness of structures by using electric means, e.g. by observing electric discharges
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/20—Investigating the presence of flaws
    • G01N27/205—Investigating the presence of flaws in insulating materials
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0078—Testing material properties on manufactured objects
    • G01N33/0081—Containers; Packages; Bottles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/18—Subjecting similar articles in turn to test, e.g. go/no-go tests in mass production

Definitions

  • the present invention relates to a device for testing, in particular, individual molded parts for defects.
  • plastic parts such as beverage caps or coffee capsules
  • plastic parts such as beverage caps or coffee capsules
  • beverage caps will be discussed in particular below, although other (plastic) molded parts are also included in the invention.
  • beverage caps usually have a base body with a shell surface, a lid surface and an internal thread, as well as a tamper-evident strip which is perforated and connected to the base body and is separated from the base body when the bottle is first unscrewed. Due to a new EU regulation, which is intended to prevent individual beverage caps separated from the bottles from being illegally disposed of in the environment, beverage caps are no longer separated from the tamper-evident strip when opened for the first time, but rather folded away from it, so that the entire beverage cap remains on the bottle neck even when the beverage is consumed.
  • Beverage caps are usually injection-molded parts, during the production of which defects can occur, particularly in the area of the injection point, such as holes, cracks, hairline cracks or Material weaknesses that cause the beverage caps to leak.
  • beverage caps have mainly been examined for such defects using an automated optical inspection.
  • the previously described guides inside the tethered caps potentially lead to difficulties in inspection, as the angular position of the guide relative to the camera lens or an immersed electrode is uncertain and thus disrupts or even prevents error detection via automatic image recognition or the immersion of the electrode.
  • the entire separation, inspection and sorting process of the beverage cap therefore represents a major bottleneck in the production of beverage caps and must be carried out quickly and reliably.
  • EP 3 204 762 B1 discloses a device in which the beverage caps are passed between two electrodes, each of which is provided with a voltage source and which are operated with such a high voltage difference that a discharge occurs if a beverage cap has a hole in it.
  • a disadvantage of this state of the art is the load on the switching elements for switching the voltage sources on and off, which already had to be reduced by using two voltage sources.
  • Another disadvantage is that the voltage between the electrodes has to be switched off as soon as there is no beverage cap between them.
  • the present invention is therefore based on the object of proposing a device which avoids the disadvantages of the prior art and yet enables efficient testing of the beverage closure caps.
  • a device for checking beverage closure caps for processing errors comprising an electrode arrangement formed from two electrodes facing each other, a transport device for transporting the beverage closure caps through the electrode arrangement, a voltage source which is only connected to one of the two electrodes and generates a high voltage in pulses, and an evaluation unit which measures the current at the other of the two electrodes, wherein the other of the two electrodes is grounded and the voltage source is provided by a high-voltage capacitor ignition.
  • beverage closure caps are understood to mean in particular those which are manufactured by injection molding as is usual in the prior art, but this is not a prerequisite for the device to function according to the invention. Rather, according to the invention, the beverage closure caps are made of a plastic or another material which has an electrically insulating effect, so that the discharge of the electrode arrangement does not penetrate the material of the beverage closure caps, but can penetrate through any holes or cracks.
  • the electrode arrangement through which the beverage closure caps are brought through the transport device for testing is made up of two electrodes facing each other, between which the beverage closure cap is located at the moment of testing.
  • the beverage closure caps must be brought in the same orientation, in which they are aligned with the lid surface in the direction of the current breakdown-receiving electrode, in the electrode arrangement, so that a proper inspection of the beverage closure caps is possible.
  • the electrodes are preferably each rotationally symmetrical in order to avoid a discharge in a direction other than in the direction of the second electrode and thus uncontrolled discharges.
  • the electrodes are also centered in a plane perpendicular to their axes of rotation, in particular coaxially.
  • One of the electrodes is connected to a voltage source, which is provided by a high-voltage capacitor ignition.
  • This electrode is supplied with a voltage from the high-voltage capacitor ignition, while the other electrode is not provided with a voltage and is preferably also grounded. Alternatively, a potential difference between the electrodes can also be created by other means. As a result, the electrode supplied with the voltage discharges and a voltage breakdown occurs to the other electrode. In the event of such a voltage breakdown, a current can be measured, which can be detected by the evaluation unit. A voltage breakdown therefore indicates a hole or a crack in a beverage cap positioned in the electrode arrangement. At the same time, the beverage cap has an electrically insulating effect, so that partial discharges can occur in the absence of a hole, but these are not detected by the evaluation unit due to the low incoming current and the beverage cap can therefore be assessed as being free of defects.
  • the high-voltage capacitor ignition is a commercially available high-voltage capacitor ignition. In addition to a capacitor, it has an ignition transformer with an open iron core. Compared to other ignition systems, the high-voltage capacitor ignition has the advantage that the ignition coils of the ignition transformer are not used as energy storage and therefore have a longer service life. The high-voltage capacitor ignition is also less susceptible to short circuits and environmental influences.
  • a high-voltage pulse generated by a high-voltage capacitor ignition is therefore determined by the energy in the capacitor and the winding ratio of the ignition transformer.
  • the high-voltage pulse is preferably available within about 50 ps after ignition. A pulse width of 10 ps is sufficient to detect a defect such as a hole in a beverage cap.
  • High-voltage capacitor ignitions usually generate up to 100 high-voltage pulses per second, although larger numbers of high-voltage pulses per second are also possible. This means that even with a small buffer between the high-voltage pulses, up to 4,000 beverage caps per second can be detected. minute.
  • the polarity of the high-voltage pulses can be switched according to the invention, so that positive or negative high-voltage pulses are generated as required, particularly depending on the product.
  • the high-voltage pulses are inverted on the primary side of the transformer via a relay with two changeover contacts. It is also advantageous for the evaluation unit to be a current measuring transformer.
  • a current measuring transformer is particularly suitable in the area of high voltages and generates higher quality signals that are therefore easier to process than simple shunt resistors.
  • the transformation ratio of an ignition transformer of the high-voltage capacitor ignition is greater than 1:80, in particular greater than 1:100, preferably 1:135. Due to such a high transformation ratio, a relatively low charging voltage is required on the primary side in order to be able to generate a high voltage by the high-voltage capacitor ignition. If the high-voltage pulse is to be 50 kV, for example, only a charging voltage of approx. 325 V is required.
  • the electrodes each have a conical tip, in particular with an opening angle of the cone less than or equal to 45°, particularly preferably equal to 40°.
  • an opening angle of the cone less than or equal to 45°, particularly preferably equal to 40°.
  • At least one of the two electrodes is mounted so as to be axially displaceable relative to the other.
  • the device can be easily adapted to a changed application. This means that the device can be used with beverage caps of different sizes almost during ongoing operation.
  • the device can be easily adapted to changing environmental parameters such as the size or temperature of the beverage caps or the ionization or humidity of the ambient air.
  • the distance between the two electrodes can be determined using conventional sensors such as light barriers or similar.
  • the distance between the electrodes is selected such that, in use, a creepage distance along a wall of the beverage closure cap is at least twice as long as an air gap that results in the presence of a manufacturing defect in the beverage closure cap.
  • the invention understands an air gap to be the most direct distance between the two electrodes that a breakdown would take in the event of a lack of resistance, i.e. due to a manufacturing defect, without creeping along a surface of the beverage closure cap.
  • a creepage distance in the sense of the invention is the distance that the breakdown would take in the case of a beverage closure cap without a hole between the two electrodes.
  • the breakdown seeks a path along the beverage closure cap to the electrode that is not subjected to voltage.
  • the upper limit of twice the length of the creepage distance compared to the air gap defines the limit for the ratio of the diameter to the height of the beverage closure cap.
  • a beverage closure cap with a small diameter and a large height may not be testable by the device. because a discharge could occur in undesirable directions, while a discharge through the holes in the beverage closure cap could be prevented.
  • a larger ratio is therefore more advantageous and promotes the desired breakdowns in the event of defects in the beverage closure caps to be examined, whereby a minimum ratio of twice the creepage distance to a single clearance distance has proven to be sufficient to maintain quality.
  • An upper limit of the ratio between creepage distance and clearance distance is indirectly defined by the upper edge of the beverage closure caps, but a distance of around 1 mm or more to the upper edge is preferably defined. In this way, the beverage closure caps can always be guided through the electrode arrangement without collision.
  • the invention provides for supplementing the device with an immersion mechanism for the electrodes in the interior of the beverage closure cap to be tested.
  • the transport device is formed from an electrically insulating sliding surface and transport means.
  • the sliding surface is understood according to the invention as a surface on which the beverage closure caps can slide with as little friction as possible.
  • Transport means according to the invention are means that drive the beverage closure caps located on the sliding surface in a desired flow direction. Suitable transport means can in particular be mechanical push devices or air nozzles.
  • a transport device is also according to the invention in which the beverage closure caps slide down an inclined sliding surface due to gravity.
  • One of the electrodes, in particular the electrode not subjected to voltage is at the top flush or recessed by a maximum of 2 mm in the electrically insulating sliding surface. This has the advantage that, due to the electrical insulation of the sliding surface, the breakdown always ends in the electrode inserted in it and breakdowns in undesirable places are avoided.
  • the transport means are designed as a conveyor belt, in particular as a perforated conveyor belt, wherein the conveyor belt is guided on the sliding surface, wherein the device in particular further comprises a separating device, in particular a rocker separating device.
  • the device in particular further comprises a separating device, in particular a rocker separating device.
  • a separating device that separates the beverage caps from one another and ideally positions each one on a hole in the conveyor belt, wherein at the same time the time of triggering the high-voltage pulse is synchronized with the beverage caps and the hole below in the conveyor belt between the two electrodes. This ensures that each beverage cap is held securely on the conveyor belt by the vacuum, and that the breakdown through a hole in the beverage cap also reaches the non-voltage-loaded electrode unhindered through the hole in the conveyor belt and the conveyor belt is not damaged.
  • a separating device can always create the same distance between the beverage caps, so that the high-voltage pulse is a homogeneous, can be a correspondingly timed high-voltage pulse.
  • a rocker separating device is particularly advantageous because it separates the beverage closure caps particularly gently because the force is only introduced via the less sensitive outer surface of the beverage closure caps.
  • a rocker separating device in the sense of the invention comprises rocker-like locking members arranged on both sides of the transport path, which can be actuated synchronously by means of one or more actuators.
  • the two pivoting members act like a pair of pliers, which are closed for a following beverage closure cap as long as the following beverage closure cap is to be held back. According to the invention, this position can be actively switched by an actuator or can also be switched and in particular released purely mechanically without an actuator. In a further position of the locking members, the following beverage closure cap is in the effective range of the locking members.
  • an actuator to switch the position of the locking elements is particularly advantageous compared to a purely mechanical switch, since the active switching of the actuator allows the holding time of these positions to be defined and adjusted using the control unit via the switching of the actuator. This allows the distance between the beverage caps to be artificially extended or controlled and their transport speed to be individually adjusted. If the locking elements are pivoted into another position, i.e. a release position, through interaction with the actuator, the beverage cap located in the effective range of the locking elements is released.
  • the transport means are designed as a star wheel, with the beverage caps accommodated in the star wheel resting on the sliding surface.
  • a star wheel has radial recesses its outer surface, in which the beverage closure caps are received and by which they are moved when the star wheel rotates about its axis of rotation.
  • the electrode arrangement is arranged on the radial outer surface of the star wheel, so that the beverage closure caps are brought into the electrode arrangement by the star wheel. In order to enable the beverage closure caps to be transported with as little friction as possible, the beverage closure caps rest on the sliding surface.
  • the device further comprises at least one sensor which measures the temperature of the beverage caps in front of the area between the two electrodes and/or the ambient air in the area between the two electrodes and/or the humidity of the ambient air in the area between the two electrodes.
  • the temperature measurement takes place in front of the area between the electrodes so that the voltage is already known at the time of the capacitor charging process and the measured temperature can be reacted to accordingly.
  • a measurement between the electrodes is disadvantageous because the breakdowns occur in the electrode arrangement and as a result the air in the electrode arrangement is higher than the rest of the ambient air.
  • a trigger voltage that is required for a discharge can be influenced.
  • the trigger voltage drops with an increased temperature because at a higher temperature there are more and more free charge carriers in the air.
  • the required trigger voltage decreases, particularly when the temperature of the beverage caps is above 40 °C.
  • the humidity of the ambient air whereby the required trigger voltage increases with increased humidity.
  • it has means for measuring an acoustic signal generated by a breakdown. In the event of a breakdown or spark impact, a noise is generated which has a different signal profile and/or a different spectrum depending on the length of the breakdown. By evaluating this acoustic signal more precisely, it is possible to distinguish whether the breakdown occurred directly due to the manufacturing error in the beverage closure cap, i.e.
  • such an evaluation is carried out by comparing the measured signal profile or spectrum with a database in which known acoustic signals from beverage closure caps with and/or without manufacturing errors are stored. If the result of the evaluation is that the breakdown is particularly long, i.e. occurred over a creepage distance, it can be assumed that there is no manufacturing error and the nearby air gap was not exposed, i.e. the beverage closure cap was free of defects.
  • a comparison of such a signal profile can also be carried out on the basis of the current measurement signal.
  • the device has a control unit with which the voltage generated by the voltage source can be regulated. Regulating the voltage is particularly advantageous when environmental parameters change, for example the temperature of the beverage caps or the humidity, or when the distance between the electrodes is changed, which can be necessary in particular when the shape of the beverage caps to be tested changes.
  • Voltage source generated voltage up to 50 kV, especially 35 - 45 kV.
  • Such voltage values have proven to be particularly advantageous and reliable trigger voltages with regard to the usual environmental parameters, the commercially available beverage cap shapes and the timing of the high-voltage pulse to be achieved.
  • the device further comprises a high-voltage feedback device comprising a voltage divider and a feedback evaluation unit.
  • a high-voltage feedback device comprising a voltage divider and a feedback evaluation unit.
  • the control is carried out via the evaluation unit, which can be used to determine whether the set high voltage is sufficient to bridge the distance between the two electrodes.
  • the device comprises a high-voltage feedback device. According to the invention, this has an integrated high-voltage feedback signal, with which the function of the high-voltage source can be monitored during operation. The high voltage is divided down using a voltage divider and then evaluated by a comparator. This makes it possible to check whether the high voltage was actually as high as set or whether it deviates from this target value.
  • the device further comprises means for influencing the ionization of the air in the area between the two electrodes.
  • means for influencing the ionization of the air in the area between the two electrodes By changing the ionization of the air in the test area, the triggering of a Voltage breakdown can be promoted or, conversely, prevented. This means that lower voltages at the high-voltage capacitor ignition are sufficient.
  • the previously described device is used in a method for checking individual beverage closure caps for processing errors.
  • the method has the following steps, which are carried out for each beverage closure cap: a) placing the beverage closure caps between the two electrodes using the transport device, b) generating a high-voltage pulse using the voltage source and applying this voltage to the electrode connected to it, c) measuring the current arriving at the other electrode. Steps a) to c) are carried out for each beverage closure cap and take place in a few fractions of a second.
  • step d) the beverage caps can be sorted out for which a current coming from the voltage-charged electrode was measurable in step c). If a current can be measured at the electrode not charged with voltage during a breakdown, this is a sign of a hole in the beverage cap, meaning that it is not suitable for normal use and must be sorted out. Sorting can be carried out using mechanical means or air jets.
  • steps b) and c) are carried out without a beverage closure cap located between the electrodes. This allows the The functionality of the device can be checked. If a current is measured at the electrode that is not subjected to voltage, it is clear that the high-voltage pulse is sufficient for a voltage breakdown at the set distance between the electrodes.
  • the temperature of the beverage caps and/or the ambient air in the area of the electrode arrangement and/or the air humidity in the area of the electrode arrangement is measured, since the trigger voltage for a breakdown is influenced by these environmental parameters. It is also advantageous to adjust the high voltage generated by the high-voltage capacitor ignition and/or the distance between the two electrodes according to the measured environmental parameters. A higher voltage is required at higher air humidity, while a lower voltage is sufficient at a temperature warmer than 40 °C.
  • Fig. 1 schematic sectional view of a device according to the invention in a first embodiment
  • Fig. 2 schematic sectional view of a device according to the invention in a first embodiment with discharge lines drawn in
  • Fig. 3 schematic view of a device according to the invention in a second embodiment.
  • Fig. 4 schematic view of a device according to the invention in a third embodiment.
  • Fig. 1 shows a schematic sectional view of a device 1 according to the invention in a first embodiment. Also shown are three beverage closure caps 2, which are conveyed through the device 1 by a transport device 6. The middle of the three beverage closure caps 2 shown has a hole in its lid surface, which is detected by the device 1.
  • the device 1 also has an electrode arrangement 3.
  • the electrode arrangement 3 comprises two electrodes 4, 5, wherein in the embodiment shown the upper electrode 4 is connected to a voltage source provided by a high-voltage capacitor ignition 7.
  • the lower electrode 5 is incorporated flush at the top into the sliding surface 11 and is not connected to a voltage source, but is grounded.
  • the high-voltage capacitor ignition 7 generates a high-voltage pulse which has such a high voltage that a breakdown from the tip of the upper electrode 4 to the tip of the lower electrode 5 is possible, especially if the beverage closure cap 2 has a hole in the lid surface. If such a breakdown occurs, the current arriving at the lower electrode 5 can be measured by an evaluation unit 8 and a hole or defect in the beverage closure cap 2 between the two electrodes 4, 5 can be detected.
  • the high-voltage pulse generated by the high-voltage capacitor ignition 7 is a very short pulse with a pulse width of a few microseconds, which is sufficient for a measurement by the evaluation unit 8 and enables a high number of beverage closure caps 2 to be processed per minute.
  • the device 1 has a sensor 14 which measures the temperature in front of the area of the electrode arrangement 3 and/or the humidity of the ambient air in the area of the electrode arrangement 3. In order to be able to react appropriately to the environmental parameters measured by the sensor 14, the device 1 also has a control unit 15 which controls the high-voltage capacitor ignition 7. The trigger voltage is lower at higher temperatures and higher at higher humidity. This can be specifically compensated by the control unit 15. In addition, the device 1 has means for influencing the ionization of the air 17, which changes the ionization of the air in the electrode arrangement 3 to a predetermined extent and thereby influences a breakdown.
  • the device has a high-voltage feedback device 16 which like the control unit 15 is connected to the high-voltage capacitor ignition 7.
  • the voltage generated by the high-voltage capacitor ignition 7 is measured and evaluated during operation via the high-voltage feedback device 16.
  • a high-voltage pulse could be triggered at a time when there is no beverage cap 2 between the two electrodes 4, 5, so that a breakdown occurs unhindered from the upper electrode 4 to the lower electrode 5 and the incoming current can be evaluated in the evaluation unit 8.
  • Fig. 2 shows a schematic sectional view of a device 1 according to the invention in a first embodiment with discharge lines drawn in.
  • the embodiment shown here corresponds to that shown in Fig. 1.
  • the distance between the electrodes 4, 5 of the electrode arrangement 3 is selected such that the creepage distance 9 is at least twice as long as the air gap 10, which arises between the electrodes 4, 5 directly as a result of a processing error in the beverage closure cap 2.
  • the creepage distance 9 is the shortest distance along the wall of the beverage closure cap 2, which can be slightly shortened by perforations such as the perforation of a tamper-evident band shown here.
  • the required trigger voltage for a discharge is too high and there is a risk of a discharge in unwanted directions.
  • the upper edge of the surface of the beverage closure caps 2 is another limit.
  • the distance between the electrodes 4, 5 should still be large enough that the tip of the upper electrode 4 does not Beverage caps 2 must be immersed and the beverage caps 2 can be guided through the electrode arrangement 3 without any obstacles.
  • a means 19 for measuring an acoustic signal is also provided, which receives and evaluates acoustic signals generated by the breakdown. The distance covered by the breakdown can thus be determined based on the signal curve and/or the spectrum of the acoustic signal of the breakdown.
  • Fig. 3 shows a schematic view of a device 1 according to the invention in a second embodiment.
  • the embodiment differs from the embodiment of the first two figures in particular in that the transport device has a conveyor belt 12 next to the sliding surface 11, which is guided on the sliding surface 11.
  • the conveyor belt 12 is perforated so that a vacuum is drawn through the holes and the beverage closure caps 2 are thus held on the conveyor belt 12.
  • the device 1 has a separating device 13, which in the embodiment shown is designed as a rocker separating device.
  • the separating device 13 always separates the beverage closure caps 2 from one another at the same distance. This makes it possible for the high-voltage pulse in the electrode arrangement 3, of which only one electrode is shown here, to be generated at the same time.
  • Fig. 4 shows a schematic view of a device 1 according to the invention in a third embodiment.
  • This embodiment like the one shown in Fig. 3, has a transport device, which has a star wheel 18 in addition to a sliding surface (not shown here). Its radial recesses are suitable for
  • the electrode arrangement 3 is arranged such that the beverage closure caps moved by the star wheel 18 are brought between the electrodes 4, 5.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
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  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
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  • Pathology (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)

Abstract

L'invention se réfère à un dispositif (1) d'inspection de capuchons de fermeture de boisson (2) à des fins de traitement d'erreurs, comportant un ensemble électrodes (3) constitué de deux électrodes (4, 5) se faisant face, un dispositif de transport (6) pour transporter les capuchons de fermeture de boisson (2) à travers l'ensemble électrodes (3), une source de tension qui est connectée uniquement à l'une des deux électrodes (4, 5) et génère une haute tension de manière pulsée, et une unité d'analyse (8) qui mesure le courant au niveau de l'autre des deux électrodes (4, 5). L'invention est caractérisée en ce que ladite autre électrode (4, 5) est mise à la terre, et la source de tension est fournie par un allumage par décharge de condensateur (7).
PCT/EP2024/063137 2023-06-16 2024-05-14 Dispositif d'inspection de pièces moulées Pending WO2024256101A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202480039994.XA CN121532644A (zh) 2023-06-16 2024-05-14 用于检查成型件的装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102023115833.3A DE102023115833A1 (de) 2023-06-16 2023-06-16 Vorrichtung zur Prüfung von Formteilen
DE102023115833.3 2023-06-16

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WO2024256101A1 true WO2024256101A1 (fr) 2024-12-19

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DE102016119833A1 (de) * 2016-10-18 2018-04-19 Finatec Holding Ag Zusammenführungsvorrichtung und -verfahren
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