EP2386362A2 - Dispositif d'application de colle - Google Patents

Dispositif d'application de colle Download PDF

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Publication number
EP2386362A2
EP2386362A2 EP10016096A EP10016096A EP2386362A2 EP 2386362 A2 EP2386362 A2 EP 2386362A2 EP 10016096 A EP10016096 A EP 10016096A EP 10016096 A EP10016096 A EP 10016096A EP 2386362 A2 EP2386362 A2 EP 2386362A2
Authority
EP
European Patent Office
Prior art keywords
viscosity
flowable material
adhesive
temperature
flowable
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.)
Withdrawn
Application number
EP10016096A
Other languages
German (de)
English (en)
Other versions
EP2386362A3 (fr
Inventor
Dieter Dr. Baldauf
Amer Dr. Tarraf
Oliver Dr. Vietze
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.)
Baumer HHS GmbH
Original Assignee
Baumer Innotec 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 Baumer Innotec AG filed Critical Baumer Innotec AG
Publication of EP2386362A2 publication Critical patent/EP2386362A2/fr
Publication of EP2386362A3 publication Critical patent/EP2386362A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0225—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work characterised by flow controlling means, e.g. valves, located proximate the outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
    • B05C11/1007—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to condition of liquid or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1039—Recovery of excess liquid or other fluent material; Controlling means therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/001—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work incorporating means for heating or cooling the liquid or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material

Definitions

  • the present invention relates to a metering system for glue or in general for adhesives and a method for metering adhesives.
  • Glue or general adhesive application systems find their application among others in the packaging industry. Exemplary fields of application are folding carton production, sheet processing (for example, envelopes, mailers, etc.) and / or fold gluing, for example in the processing of corrugated cardboard.
  • Known glue application systems are based on metering valves, as used for example in the DE 41 13 445 C2 are described.
  • the metering valves generally have a metering piston which is part of an electromagnet and through which the metering piston can be moved upwards. The downward movement is generally by a compression spring.
  • the dosing piston In a non-activated state of the magnet, the dosing piston is due to the existing spring pressure on the valve body, in detail on the nozzle, on: The valve is closed. There is no adhesive applied.
  • the spring force is overcome and the metering piston lifted from the valve body: The valve is open. The adhesive is applied.
  • the aim here is the most accurate possible bonding, in particular both in terms of the positioning of the adhesive as well as in terms of the applied amount of the adhesive.
  • the viscosity of the adhesive is a very important parameter. Properties, such as course and / or layer thickness of the cured adhesive, are significantly influenced by the viscosity of the adhesive.
  • the viscosity is determined in a reservoir connected to the metering valve.
  • the principle of a rotational viscometer known from the prior art is used here. In this case, the torque is measured, which is transmitted from a cylinder rotating at a constant speed through the space located in the space, especially for non-Newtonian, liquid on a second, coaxial cylinder.
  • Occurring temperature and / or pressure changes such as in the connection to the metering device and / or within the metering device, which lead to a change in viscosity, can not be detected here.
  • An insufficiently defined viscosity of the adhesive during application of the adhesive generally results in an insufficiently metered amount of adhesive at the nozzle opening, so that, for example, the adhesive seam is not sufficiently defined.
  • the object is to provide a dosage for flowable materials, which at least reduces the disadvantages of the prior art.
  • the invention initially provides a method for dosing a flowable material, in particular for applying an adhesive, comprising the method steps,
  • the process according to the invention can be carried out in particular by means of the system according to the invention.
  • the system according to the invention is in particular designed for carrying out the method according to the invention.
  • the flowable material is preferably an adhesive which is generally also referred to as a glue for many applications, in particular also in the gluing of cellulose-containing materials, such as cardboard, paper and wood.
  • the flowable material is flowable at the selected operating temperature or ambient temperature, or it may be made flowable, for example, by a temperature increase and / or diluent.
  • the metering device preferably comprises a metering valve.
  • the exit channel is preferably formed as a nozzle.
  • the closure device is preferably an anchor or a metering piston.
  • the measurement or determination of the viscosity takes place in or within the metering device.
  • the measurement takes place in the chamber of the metering device and / or in the outlet channel and / or in the region of the outlet channel.
  • the device for detecting the viscosity is associated with the metering device.
  • the determined actual viscosity is compared with a desired viscosity of the flowable material. In the light of simple control or monitoring of the quality, it may be sufficient to determine only the viscosity without taking further action, if at all necessary.
  • an adaptation of the determined viscosity or actual viscosity to the desired viscosity of the flowable material is provided.
  • These viscosity modifiers can be used for metering the adhesive based on the viscosity value.
  • the viscosity adjusting means are formed in a first embodiment as a means for temperature adjustment.
  • the temperature in particular locally, can be increased by means of a heating wire and / or microwave radiation.
  • a viscosity reduction for example by means of a Peltier element.
  • the means for viscosity adjustment are formed as a means for diluting the flowable material and thus for reducing the viscosity and / or as a means for reducing or thickening the flowable material and thus for increasing the viscosity. These are added to or mixed with the flowable material.
  • thickening may be accomplished by removing thinners, such as a solvent, from the adhesive. Removal of the thinner is possible in a simple manner in that the adhesive is heated by means of a lifting device and thinner is thereby evaporated.
  • control device or a control system is provided.
  • the control system may be provided, for example, as a preferably electronic circuit and / or by means of a computing device.
  • the regulating device is used to adapt times in which the closure device is in an open and / or in a closed position, for example by determining the position of a piston.
  • Another alternative or additional embodiment is characterized by adjusting a flow volume or opening formed between the closure device and the exit channel in an open position of the closure device.
  • the stroke of a closure device designed as a metering piston is adapted.
  • the variables mentioned are individually and / or in combination adapted so that a disturbing deviation from a desired viscosity is compensated.
  • the Compensation is in particular such that the metered or applied amount of flowable material again corresponds to a desired value.
  • determining the viscosity comprises measuring the temperature of the flowable material, for example by means of a preferably integrated temperature sensor arranged in the outlet channel or in the nozzle.
  • the temperature can be measured directly in or on the flowable material. However, it can also be measured indirectly via the temperature of the wall which is in contact with the flowable material.
  • the invention is characterized in that the means for detecting the viscosity comprises at least one temperature sensor.
  • the measured temperature is compared with a temperature-viscosity characteristic curve.
  • an individual temperature-viscosity characteristic exists for each flowable material, depending on its degree of dilution or, more generally, on its composition.
  • the temperature measurement is based in a first variant on a temperature-dependent expansion or shrinkage of at least one material.
  • the temperature measurement is based on a frequency measurement in a second supplementary or alternative embodiment.
  • the temperature measurement is preferably based on a measurement of the electrical Resistance, electrical current and / or electrical voltage.
  • An example of such a temperature sensor is a temperature-dependent electrical resistance.
  • the temperature of an actuating device, or the drive for the closure device preferably via a measurement of the electrical resistance of the actuator, measured.
  • the actuator is provided, for example, using a coil or coil system that generates magnetic forces that are applied to another element.
  • the viscosity is determined by measuring the local pressure of the flowable material.
  • the device for detecting the viscosity comprises at least one pressure sensor.
  • the prevailing in the metering pressure in the flowing adhesive is dependent on the pressurization.
  • the pressure difference is caused by the flowable material emerging from the outlet channel and the resulting pressure drop.
  • the pressure drop or the pressure difference is dependent on the viscosity of the flowable material.
  • a pressure change or the pressure drop in the outlet channel is determined.
  • the invention when determining a pressure or a pressure difference, is characterized by determining a deformation, which is caused by the action of the flowable material, of a membrane which is preferably arranged in the metering device and is connected to the outlet channel.
  • the pressure sensor can thus be formed with a membrane. The bending of the membrane can be detected, for example, inductively, capacitively and / or piezoelectrically.
  • the viscosity is determined via a movement of a test body in the flowable material and / or a penetration depth of the test body into the flowable material.
  • the device for detecting the viscosity has a test body whose movement in the flowable material, for example via a torque, can be evaluated.
  • the test body can also be provided, for example, by the closure device, and preferably its movement behavior can be evaluated.
  • the viscosity is determined in particular via a movement of the closure device in the flowable material and / or a changed relative position or height of the closure device in the flowable material, in particular with respect to the outlet channel during opening. For example, at a same current pulse to open the valve or the closure device is the Height or stroke of the closure device depending on the viscosity of the flowable material.
  • a further determination of the viscosity according to the invention is based on an acoustic measurement and / or on a high-frequency measurement.
  • the device or have the means for detecting the viscosity of a transmitter and a receiver for sound, preferably ultrasound, and / or for high frequency.
  • Transmitter and receiver can be arranged arbitrarily in the metering device. In general, transmitter and receiver are arranged separately. Transmitter and receiver in one embodiment form a unit or are formed as a single component.
  • the quality for example the vibration curve, preferably the damping, of a vibration is evaluated.
  • the vibration of a quartz crystal is more strongly attenuated in a flowable material of higher viscosity than in a flowable material of lower viscosity.
  • the viscosity of the flowable material may be determined by the decay of the transmitted waves, for example, ultrasonic waves, at a given and / or measured temperature and / or a particular and / or measured composition of the flowable material.
  • the waves for example ultrasonic waves, can also be pulsed.
  • the viscosity of the flowable material by a frequency and / or a phase shift of a Signals are determined.
  • the wave for example, ultrasonic wave, this can be modulated arbitrarily.
  • the viscosity is determined by detecting a frequency shift, in particular as a result of the Doppler effect.
  • the viscosity of the flowable material is determined by the flow rate or by a change in the flow rate.
  • the transmitter and receiver assembly is aligned with the flow direction of the flowable material.
  • the flow can be determined at a given temperature. It is also possible to carry out a viscosity determination. From this measurement, additional information about the viscosity can be obtained. The accuracy of the measurement is increased.
  • the transmitter and receiver assembly is aligned with the flow direction of the flowable material.
  • the sensors in particular with at least one transmitter and at least one receiver, may be arranged aligned such that their connection line lies in the direction, preferably parallel, to the flow direction of the flowable material.
  • the knowledge and / or the adjustment of the viscosity of the flowable material is also important insofar as the viscosity is also dependent on the carrier on which the flowable material is to be metered or applied.
  • a carrier is a carton bottom for making a carton or a paper for making an envelope.
  • the properties of the support or the support surface are considered to be important, for example with respect to the material, the roughness, the dimensions and / or the geometry. Therefore, in one embodiment, the invention is also characterized in that the viscosity of the flowable material to be metered or applied is adapted to the carrier.
  • the carrier to which the flowable material is to be metered or applied is detected prior to application of the flowable material.
  • a, preferably optical, sensor for detecting the carrier, to which the flowable material is to be metered is provided.
  • This sensor is preferably arranged in front of the metering device. That the sensor for detecting the carrier is arranged in a sequence of steps at least one step before dosing by or before the metering device.
  • the dosing system has a control system.
  • the control system preferably comprises a reservoir in which at least one temperature-viscosity curve and / or a pressure-viscosity curve and / or motion-viscosity curve and / or carrier-viscosity curve are or are stored.
  • the control system may be provided by a, preferably electronic, circuit and / or a computing device.
  • the control system may be positioned on the metering device. In a further embodiment, however, the control system is positioned away from the metering device.
  • the metering device can be wirelessly controlled and / or regulated.
  • WLAN represents an example of a wireless transmission.
  • the parameters for operation of the dosing device can be selectively and / or autonomously transmitted, for example, directly to a receiver and / or networked wireless devices. About this wireless connection, the metering device can also be parameterized and / or addressed.
  • the metering device can be controlled and / or regulated remotely and / or by means of parameters which are transmitted wirelessly, for example from the network.
  • the sensor for detecting the carrier which takes over the monitoring of the supplied material to be bonded, discovers that, for example, another type of cardboard to the metering device or nozzle.
  • a signal is then wirelessly sent to the nozzle.
  • the transmitted signal may contain the desired viscosity and / or be used in a computing device to calculate the viscosity and to change it, preferably locally and / or temporarily.
  • the transmitted signals can be assigned to the means for temperature adaptation in such a way that the signals not only control and / or regulate the means for temperature adaptation but also couple them to this and in particular provide energy.
  • the temperature can be locally heated by means of a kind of mini or micro heater, for example by means of a heating wire and / or a, preferably local, microwave radiation, such as an RF micro-antenna.
  • the antenna or the receiver for the signals can also be the heater, which for example increases the viscosity for a variable period of time.
  • the invention is characterized in that the metering device is wirelessly controllable and the means for viscosity adjustment of the flowable material can be coupled to the wirelessly transmitted signals.
  • the viscosities are changed as needed to at least reduce the incidence of spurious particles generated during application.
  • the disturbing particles are caused in particular by the opening and closing of the closure device. They are, so to speak, remnants of the flowable material, which still lie in the gap between the closure device and outlet channel during opening and closing and spray away when closing.
  • the viscosity is also measured in a storage container, which is connected to the metering device. This gives the basic value of the viscosity at the ambient temperature.
  • kits or a kit for retrofitting for a metering system which is preferably already in operation.
  • the kit includes a sensor for detection the temperature in the metering device and / or a sensor for determining the pressure in the metering device and / or a test body whose movement is evaluable, for moving in the metering device and / or a transmitter for ultrasound and / or a receiver for ultrasound and / or a high-frequency transmitter and / or a high-frequency receiver and / or means for adjusting the viscosity of a flowable material.
  • Valves, pumps and pressure vessels form the essential components for an application system which is used for a flowable material, in particular for an adhesive or a glue.
  • FIGS. 1 to 4 show a metering device 1, which is also referred to as a metering valve or valve or order valve, in various representations.
  • Fig. 4 additionally shows other elements of an adhesive application device 9 with the metering device 1.
  • the valve 1 shown is a valve for applying preferably low-viscosity adhesives, in particular having a viscosity of up to about 500 mPa.s (Brookfield).
  • adhesives are, in particular, water-based dispersion adhesives, starch adhesives and / or dextrin adhesives. Since, depending on the application often simultaneously adhesive and sealing properties are required to be under an adhesive and a Sealant and / or a binder understood.
  • the adhesive may be, for example, a wood adhesive, metal adhesive, paper adhesive, automobile adhesive, packaging adhesive, paving adhesive and / or tile adhesive.
  • the valve 1 shown is a fast-switching, electrically operated valve.
  • the working pressure is in a range of about 1 to 6 bar.
  • the adhesive exits through the exit channel 170.
  • the diameter of the outlet channel 170 which is also referred to as a nozzle, according to one embodiment of the invention, a diameter in the range of 0.2 to 0.8 millimeters, for example, 0.4 mm.
  • the closure device 160 which is also referred to as anchor or piston or metering piston, switching frequencies of up to about 600 cycles / second can be achieved.
  • the device enables contactless adhesive application.
  • the distance between nozzle 170 and a product is generally 5 to 10 mm.
  • the operation of the valve 1 is based on FIG. 4 explained.
  • the device is equipped with a magnetic coil 120, a spring-loaded armature, or a closure device 160, preferably with a ball needle 161, and a nozzle 170, preferably a stainless steel nozzle.
  • the ball needle 161 closes the valve seat in the nozzle 170 in the unactuated state.
  • the adhesive is under pressure at the valve seat.
  • the adhesive will be at a pressure in a range of about 1 to about 6 bar provided.
  • the metering device 1 as a device for pressurizing the adhesive 15 to a compressed air connection 500, to which a pump 16 is connected to provide the pressure used.
  • the adhesive 15 is fed to the dosing device 1 via an inlet 18 connected to the bottom of a reservoir 17 to an adhesive connection 300.
  • an adhesive connection 300 In order to supply the adhesive 15 under overpressure, alternatively or in addition to the compressed air connection 500, other means for pressurizing can also be seen.
  • a conveyor in the supply line 18, such as an eccentric screw pump for conveying viscous media is conceivable.
  • the armature or the closure device 160 By a current pulse to the coil 120, the armature or the closure device 160 is pulled up against the spring 270 and releases the nozzle opening 170, so that the adhesive emerges. After the decay of the current pulse, the closure device 160 closes under the spring pressure, the adhesive flow is interrupted. The device allows a dot as well as a coating application of the adhesive. In machine standstill, the shutter 290 closes under spring pressure and covers the nozzle 170 airtight. For this purpose, an electropneumatic 2/2-way valve is preferably used. The closure 290 is automatically opened as soon as a product enters under the order valve 1. During work breaks the shutter 290 is closed automatically.
  • the amount of adhesive or dot size per stroke depends on the viscosity of the adhesive, the applied pressure, the open time and / or the armature stroke.
  • the setting of the required amount of adhesive is carried out, for example, by adjusting the adhesive pressure, adjusting the armature stroke and / or adjusting the activation time of the valve 1 (for example by means of a control device, not shown). For example, an increase in adhesive pressure leads to larger dots.
  • the pressure is adapted to the adhesive viscosity. The higher the viscosity the higher the pressure to choose.
  • the point size can be adjusted, for example, by means of the valve lift.
  • a stroke adjustment 140 is provided. This serves to achieve an adjusted adjustment of the working stroke. This adjusted setting can also be done automatically via a control loop.
  • An upper and lower limit are set by adjusting the stroke.
  • the lower limit is the so-called zero stroke adjustment: no adhesive is emitted.
  • the upper limit is the working stroke setting: the desired dot size of the adhesive is achieved.
  • the viscosity outside of in FIGS. 1 to 4 valve 1 shown determined.
  • the viscosity is determined in a reservoir connected to the metering valve 1.
  • Temperature and / or pressure changes, such as in the connection to the metering device 1 and / or within the metering device 1, which lead to a change in viscosity, can not be detected.
  • Fig. 4 It can be seen that the power supply of the solenoid coil 120 via the electrical connection 400 of the metering device 1 takes place.
  • the power supply is effected via a control device 25 connected to the electrical connection 400.
  • a device for detecting the viscosity of the adhesive in the form of a viscosity sensor 20 is also connected to the control device 25 via the electrical connection 400.
  • the control device 25, which controls the closure device, regulates the application quantity taking into account the value of the viscosity measured by the viscosity sensor 20.
  • a simple way of regulation consists in an adjustment of the ratio of the opening and closing times of the valve. In particular, the order quantity can be kept constant independently of the viscosity value by the regulation.
  • FIG. 5 shows a detailed view of the chamber 10, also referred to as the nozzle outlet channel 170 and also referred to as the anchor closure device 160 of the valve 1 from FIG. 4 ,
  • the spring 270 is not shown.
  • a kind of calibration measurement is carried out to determine the viscosity before the actual operation of the device.
  • a defined current pulse is applied to the coil 120.
  • the armature 160 will experience a different acceleration as a function of the viscosity and / or achieve a different height H.
  • an acceleration characteristic and / or a height characteristic can be concluded that the viscosity of the adhesive.
  • the Acceleration characteristic and / or the height characteristic can or can be determined experimentally or empirically and / or based on model calculations, in particular with a defined variation of the viscosity.
  • a measurement of the temperature is provided for determining the viscosity.
  • the knowledge of the temperature-viscosity characteristic for the adhesive used allows an indirect determination of the viscosity.
  • a temperature sensor is provided in the valve 1. This can preferably be arranged in the region of the nozzle 170, for example within the nozzle 170, in the wall 101 of the chamber 10 and / or as indicated in or on the armature 160.
  • Possible principles for determining the temperature are based, for example, on a mechanical detection of the temperature, an electrical quantity measurement and / or a frequency measurement.
  • a concrete example of the former group are materials with different coefficients of thermal expansion.
  • a bimetallic thermometer may be mentioned here.
  • Concrete examples of the second group are thermocouples and / or the use of the temperature-dependent electrical resistance of conductors and semiconductors.
  • a Pt100 resistor may be mentioned.
  • a concrete example of the latter group is the temperature-dependent difference frequency of differently cut quartz crystals. It should be noted that the list is only an example and not exhaustive.
  • FIGS.a to 6.c show further possibilities for the determination of the viscosity. They show a schematic detail view of the side wall 101 of the chamber 10 with built-in means 20 for detecting the viscosity of the adhesive.
  • FIG. 6 the measurement of the viscosity takes place via the pressure with which the adhesive rests against a membrane 21.
  • a portion of the wall 101 of the chamber 10 is for this purpose as or formed with a membrane 21.
  • the membrane is shown for a non-deformed state (with a solid line) and for two loaded and therefore deformed states (each with a dashed line).
  • the membrane 21 is deformed to different degrees. It has a different curvature radius KR.
  • KR can be an integrated, adapted to the design membrane, or even a wall-mounted commercial pressure sensor can be used.
  • the pressure depends on the one hand on the working pressure with which the adhesive is provided in the dosing device 1. This is initially set initially.
  • the final or actual pressure in the dosing device is additionally dependent on the temperature and / or viscosity of the adhesive. Detecting this membrane deformation can be done for example by capacitive sensors, piezoelectric sensors and / or as shown by inductive sensors. Preferably, the viscosity can be determined by means of a deformation-viscosity characteristic curve.
  • the measurement of the viscosity takes place via a test body 22.
  • the test body 22 is here arranged laterally in a recess of the chamber wall. This is shown by way of example cylindrical.
  • the test body 22 is associated, for example, with a capacitive actuator, a piezoelectric actuator and / or an inductive actuator, as shown here, with which a force is exerted on the test body.
  • a defined current pulse is applied to the coil.
  • the test body 22 will experience a different acceleration depending on the viscosity of the adhesive and / or achieve a different penetration depth L into the chamber.
  • the penetration depth L can be measured, for example, via a scale arranged on the test body 22.
  • the acceleration can be determined, for example, with an acceleration sensor arranged on the test body 22.
  • the viscosity of the adhesive can be deduced by means of a motion characteristic, such as an acceleration characteristic and / or a penetration characteristic.
  • a further embodiment of the invention is based on an acoustic measurement of the viscosity, preferably by means of Ultrasonic.
  • the measurement of the time and / or the propagation speed of an acoustic pulse allows a conclusion on the viscosity of the adhesive.
  • transmitter and armature 160 for example, in the recess of the wall 101 (see in Figure 6.b ) transmitter and armature 160 (see in FIG. 5 )
  • a receiver in particular with arbitrary angles to each other, be arranged.
  • the viscosity is determined by the quality of a vibrating system.
  • This measurement principle is based on the fact that in a viscous medium, the attenuation of a signal, such as the vibration of a resonant oscillating element increases. The quality factor of a vibration decreases accordingly.
  • An embodiment is in Fig. 6.c shown. Through the wall 101 of the chamber 10 connecting lines are performed, which contact a vibrating electromechanical device. At the in Fig. 6.c As shown, a vibrating quartz 23 or other piezoelectric crystal is provided.
  • the crystal for example, excited by an electrical pulse, the crystal oscillates with a correspondingly the quality of the system time-decaying, or damped oscillation, which can be tapped at the leads 24 as an electrical signal.
  • the damping depends on the temperature-dependent viscosity of the surrounding medium. On the basis of the Abkling s the vibration, therefore, the viscosity can be determined.
  • the means for viscosity adjustment 30 are each in the flow direction the or the viscosity sensors 20 arranged (see FIG. 5 ).
  • the means for adjusting the viscosity 30 are each, in particular together with the viscosity sensor 20, coupled to the control system or even part of the control system.
  • the viscosity adjustment is illustrated by means of a temperature adjustment.
  • a heating wire 31 inserted in the side wall. This can also be arranged only on the top of the side wall, inside or outside. A favorable position of the heater is in the region or within the outlet opening 170. The temperature is increased locally in the adhesive by means of the heating wire.
  • the control of the piston movement based on the caused by the different temperatures at the outlet opening and the piston viscosity gradient can be done.
  • the heating wire can be heated directly conductive, preferably with a current flow in the heating wire.
  • several heating devices can be provided.
  • a first heating wire can be provided further upwards along the flow direction for coarser control of the viscosity and a further, more quickly heated heating wire directly at the outlet opening 170.
  • the heating wire 31 acts as an antenna for radiation, for example for microwave radiation. The heating wire 31 is thus heated by the incident radiation.
  • irradiated electromagnetic radiation can continue to be locally selectively heated parts of the metering device.
  • an electromagnetic alternating field can be directed directly at the ball needle and the ball needle can be heated selectively.
  • the viscosity adjustment is illustrated by means for dilution 32 and / or by means for thickening 33 of the flowable material. It is to a valve 34 introduced in the side wall. On the outside of two containers with the means 32 and 33 are arranged. Depending on whether the viscosity of the adhesive is to be increased or decreased, one agent 32 or the other agent 33 is added to the adhesive.

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  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP10016096.9A 2010-05-12 2010-12-27 Dispositif d'application de colle Withdrawn EP2386362A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010020407 2010-05-12

Publications (2)

Publication Number Publication Date
EP2386362A2 true EP2386362A2 (fr) 2011-11-16
EP2386362A3 EP2386362A3 (fr) 2015-08-26

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EP10016096.9A Withdrawn EP2386362A3 (fr) 2010-05-12 2010-12-27 Dispositif d'application de colle
EP10016093.6A Not-in-force EP2386363B1 (fr) 2010-05-12 2010-12-27 Douille de colle dotée d'un récepteur de particules

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CN104148244B (zh) * 2014-07-23 2016-08-17 采埃孚富奥底盘技术(长春)有限公司 一种零件表面自动涂油装置
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DE102016000064A1 (de) 2016-01-06 2017-07-06 Baumer Hhs Gmbh Klebstoffauftragsvorrichtung
CN110586414B (zh) * 2019-09-12 2021-08-03 义乌市圣涛装饰有限公司 一种pvc管道拼接辅助涂胶设备
DE102020008094B4 (de) 2020-07-03 2022-08-25 4BoxProducer.com Ltd. Vorrichtung und Verfahren zum Auftrag von Kaltleim
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CN114405758B (zh) * 2021-12-30 2023-09-12 歌尔科技有限公司 点胶装置和点胶方法
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EP2386363B1 (fr) 2018-06-27
EP2386362A3 (fr) 2015-08-26
EP2386363A3 (fr) 2015-08-26
EP2386363A2 (fr) 2011-11-16

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