EP3512640B1 - Device and method for dynamic metering of sealing compounds - Google Patents

Device and method for dynamic metering of sealing compounds Download PDF

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Publication number
EP3512640B1
EP3512640B1 EP17762112.5A EP17762112A EP3512640B1 EP 3512640 B1 EP3512640 B1 EP 3512640B1 EP 17762112 A EP17762112 A EP 17762112A EP 3512640 B1 EP3512640 B1 EP 3512640B1
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Prior art keywords
sealant
containers
drive
components
component
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EP17762112.5A
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German (de)
French (fr)
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EP3512640A1 (en
Inventor
Heinz Burock
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Chemetall GmbH
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Chemetall GmbH
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    • 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
    • B05C11/1036—Means for supplying a selected one of a plurality of liquids or other fluent materials, or several in selected proportions, to the applying apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/71775—Feed mechanisms characterised by the means for feeding the components to the mixer using helical screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • B01F35/83—Forming a predetermined ratio of the substances to be mixed by controlling the ratio of two or more flows, e.g. using flow sensing or flow controlling devices
    • B01F35/831—Forming a predetermined ratio of the substances to be mixed by controlling the ratio of two or more flows, e.g. using flow sensing or flow controlling devices using one or more pump or other dispensing mechanisms for feeding the flows in predetermined proportion, e.g. one of the pumps being driven by one of the flows
    • B01F35/8311—Forming a predetermined ratio of the substances to be mixed by controlling the ratio of two or more flows, e.g. using flow sensing or flow controlling devices using one or more pump or other dispensing mechanisms for feeding the flows in predetermined proportion, e.g. one of the pumps being driven by one of the flows with means for controlling the motor driving the pumps or the other dispensing mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • B01F35/88—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise
    • B01F35/883—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise using flow rate controls for feeding the substances
    • 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
    • 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
    • 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
    • B05C11/1047—Apparatus or installations for supplying liquid or other fluent material comprising a buffer container or an accumulator between the supply source and the applicator
    • 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
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/06—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying two different liquids or other fluent materials, or the same liquid or other fluent material twice, to the same side of the work
    • 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
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
    • 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
    • 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

Definitions

  • the present invention relates to a device for the dynamic dosing of sealing compound volumes and a corresponding method.
  • Sealing compounds such as those used in aircraft and spacecraft are usually produced by mixing two components - base compound and hardener - in a mixing device and then cured on site, i.e. on the component to be coated. The latter can be done thermally and/or by actinic radiation.
  • a device (1) for this is in Fig. 1 shown:
  • the components A and B (5a, 5b) are initially in separate reservoirs (2a, 2b).
  • a suitable drive (3) preferably a servo drive, is controlled in such a way that the two components (A and B) (5a, 5b) are conveyed at a defined speed into a static mixing tube (7) and mixed with one another.
  • the dosing speed i.e. the volume of sealing compound that is applied per unit of time
  • the dosing speed must be adjusted dynamically, i.e. depending on the point to be sealed. This is also referred to as dynamic dosing.
  • U.S. 2011/253747 A1 discloses a device for the dynamic dosing of sealing compounds, having two containers for sealing compound components, a first drive, which is connected to two devices, one of which can convey one of the sealing compound components out of its container, a drive controller, a mixing unit for mixing the components from the containers funded sealant components with an opening for applying the sealant to a component.
  • this device cannot be used to achieve adequate mixing quality and dosing accuracy independently of the dosing speed.
  • the device (1) according to the invention for the dynamic dosing of sealing compounds has two containers (2a, 2b) for sealing compound components, a first drive (3) which is connected to two devices (4a, 4b), one of which each controls one of the sealing compound components (5a , 5b) from its container (2a, 2b) (conveying devices), a drive controller (6), a mixing unit (7) for mixing the sealant components (5a, 5b) conveyed from the containers (2a, 2b) with an opening (8) for applying the sealing compound (9) to a component and, in addition, a compensating tank (10) with a compensating volume (11) and a second drive (12) which is connected to a piston (13) which is inserted into the compensating volume ( 11) of the expansion tank (10) is sufficient.
  • the expansion tank (10) is connected to the mixing unit (7). Through this Connection is the expansion tank (10) filled and emptied.
  • the first and the second drive (3, 12) can be dynamically controlled together by the drive controller (6).
  • a first such device (1) according to the invention is in Fig. 2 as in Fig. 3 , a second in Fig. 4 shown, but these figures should not be understood as limiting.
  • a “sealant” should always mean the mixture of two sealant components.
  • the "first drive” can also consist of two separately controlled drive units (3a, 3b), of which the first is connected to the first and the second to the second of the two conveyor devices (4a, 4b) (cf. Fig. 4 ). According to a preferred embodiment, however, the first drive consists of a single drive unit (3) which is connected to the two conveyor devices (4a, 4b).
  • the "two containers for sealing compound components” can be storage containers (2a, 2b), ie containers that can each be filled with a certain amount of sealing compound component (5a, 5b) and then sealed (cf. Fig. 2 and Fig. 3 ).
  • the "two containers for sealant components" can be open containers (15a, 15b), ie containers that can each be continuously filled with a sealant component (5a, 5b) (cf. Fig. 4 ). In this way, an uninterrupted flow of sealant can be achieved (cf. Fig. 4 ).
  • the “mixing unit” can be a static mixer, a dynamic mixer, or a combination of both.
  • the first and/or second drive is preferably a servo drive, more preferably the first and the second drive are each a servo drive.
  • the two conveying devices are pistons, one of which reaches into one of the containers, which in this case are storage containers, and can push out the corresponding sealing compound component.
  • the two conveying devices are pumps which can draw the sealing compound components out of their containers by generating a vacuum.
  • Screw eccentric pumps and scoop piston pumps are particularly suitable for this.
  • said containers are open containers (15a, 15b), which can each be continuously filled with a sealing compound component (5a, 5b) (cf. Fig. 4 ).
  • the mixing unit is preferably a static mixer, in particular a static mixing tube.
  • the expansion tank is preferably a plastic cartridge or a component that is easy to clean, particularly preferably a plastic cartridge, in particular one made of polyethylene (PE).
  • PE polyethylene
  • the device (1) is a 2-component mixing and dosing system such as that manufactured by Hilger u. Kern (Mannheim, Germany), for example. These systems make it possible to convey, mix and dose sealant (9) consisting of 2 components (5a, 5b) from storage containers (2a, 2b) (cf. Fig. 2 and Fig. 3 ).
  • the sealing compound can also be one which essentially only cures after exposure to actinic radiation, in particular to UV radiation.
  • a sealant has the advantage that its curing can be initiated in a controlled manner with a trigger (so-called SCOD : sealant curing on demand).
  • the device according to the invention can comprise an integrated source for actinic radiation, in particular for UV radiation.
  • the containers (2a, 2b) of the device (1) according to the invention are each filled with a sealant component (5a, 5b) (components A and B or base material and hardener).
  • the sealing compound components (5a, 5b) are then mixed in a mixing unit (7) and the resulting sealing compound (9) is applied to a component by the sealing compound components (5a, 5b) being removed from the containers (2a, 2b) are funded.
  • a dosing speed below a critical value preset in the drive control (6) is achieved in that the conveying speed of the sealing compound components (5a, 5b) from the containers (2a, 2b) is reduced to the critical value of the dosing speed and the equalizing tank ( 10) is filled with sealant (9) by means of the second drive (12) in such a way that the speed at which the expansion tank (10) is filled corresponds to the difference between the critical and the realized value of the dosing speed.
  • a dosing speed of, for example, 1 volume unit of sealant/time unit is achieved by reducing the conveying speed of the sealant components (5a, 5b) from the containers (2a, 2b) to 3 volume units of sealant/time unit. Unit of time lowered and the expansion tank (10) is filled at a rate of 2 volume units of sealant / unit of time.
  • Fig. 2 shows the device (1) according to the invention at a dosing rate above the critical value.
  • the dosing rate is lower than the critical value, this is indicated by a reduction in the thickness of the bead of sealant (9).
  • the compensating volume (11) of the compensating tank (10) is filled with sealing compound.
  • the promotion of the sealing compound components from the containers is preferably stopped and the sealing compound is conveyed out of the expansion tank by means of the second drive until the sealing compound in the expansion tank is used up. This will help keep the reservoir empty enough to allow the reservoir to be refilled with sealant at a later date.
  • the sealing compound components can then continue to be conveyed from the containers by means of the first drive and at the same time the sealing compound can be conveyed from the expansion tank by means of the second drive until the sealing compound in the expansion tank is used up. This makes it possible to increase the dosing speed beyond the maximum value that would be possible with the device without the expansion tank.

Description

Die vorliegende Erfindung betrifft eine Vorrichtung zur dynamischen Dosierung von Dichtmassevolumina sowie ein entsprechendes Verfahren.The present invention relates to a device for the dynamic dosing of sealing compound volumes and a corresponding method.

Dichtmassen wie sie beispielsweise bei Flug- und Raumfahrzeugen zum Einsatz kommen werden in der Regel durch Mischen zweier Komponenten - Grundmasse und Härter - in einer Mischvorrichtung erzeugt und anschließend vor Ort, d.h. auf dem zu beschichtenden Bauteil ausgehärtet. Letzteres kann thermisch und/oder durch aktinische Strahlung geschehen.Sealing compounds such as those used in aircraft and spacecraft are usually produced by mixing two components - base compound and hardener - in a mixing device and then cured on site, i.e. on the component to be coated. The latter can be done thermally and/or by actinic radiation.

Eine Vorrichtung (1) hierzu ist in Abb. 1 gezeigt: Die Komponenten A und B (5a, 5b) befinden sich dabei zunächst in separaten Vorratsbehältern (2a, 2b). Ein geeigneter Antrieb (3), vorzugsweise einen Servoantrieb, wird so angesteuert, dass die beiden Komponenten (A und B) (5a, 5b) mit definierter Geschwindigkeit in ein statisches Mischrohr (7) gefördert und miteinander vermischt werden. Die so erhaltene, noch nicht vollständig ausgehärtete Dichtmasse (9) verlässt die Vorrichtung (1) dann in Form einer Raupe.A device (1) for this is in Fig. 1 shown: The components A and B (5a, 5b) are initially in separate reservoirs (2a, 2b). A suitable drive (3), preferably a servo drive, is controlled in such a way that the two components (A and B) (5a, 5b) are conveyed at a defined speed into a static mixing tube (7) and mixed with one another. The sealant (9) obtained in this way, which is not yet fully cured, then leaves the device (1) in the form of a bead.

Bei der Abdichtung von Bauteilen mit komplizierter Geometrie muss die Dosiergeschwindigkeit, also das Dichtmassevolumen, welches pro Zeiteinheit aufgetragen wird, dynamisch, d.h. je nach gerade abzudichtender Stelle, angepasst werden. Man spricht auch von einer dynamischen Dosierung.When sealing components with a complicated geometry, the dosing speed, i.e. the volume of sealing compound that is applied per unit of time, must be adjusted dynamically, i.e. depending on the point to be sealed. This is also referred to as dynamic dosing.

Bei letzterer stellt sich allerdings das Problem, dass die Dosiergeschwindigkeit bei Verwendung von Statikmischern nicht beliebig erniedrigt werden kann, ohne dabei das Mischungsverhältnis und die Mischgüte negativ zu beeinflussen.With the latter, however, the problem arises that the dosing speed cannot be arbitrarily reduced when using static mixers without negatively influencing the mixing ratio and the mixing quality.

Dies ist vor allem darauf zurückzuführen, dass die Grundmassen-Komponente - beispielsweise eine solche auf Polysulfid-Basis - komprimierbar ist, während die Härter-Komponente keine Komprimierbarkeit aufweist, was mit abnehmender Dosiergeschwindigkeit zu einer im Vergleich zur Härter-Komponente immer weiter verzögerten Freisetzung der Grundmassen-Komponente aus ihrem Vorratsbehälter führt.This is mainly due to the fact that the base mass component - for example one based on polysulfide - is compressible, while the hardener component has no compressibility, which, with decreasing dosing rate, leads to an increasingly delayed release of the hardener component compared to the hardener component Basic mass component leads from its storage container.

Insbesondere bei geringsten Dosiergeschwindigkeiten wie sie für Punktdosierungen benötigt werden treten daher Probleme hinsichtlich eines veränderten Mischungsverhältnis sowie einer verminderten Mischgüte auf.Problems with regard to a changed mixing ratio and reduced mixing quality therefore arise, particularly at the lowest dosing speeds, such as are required for point dosing.

Wird die Fahrgeschwindigkeit einer Traverse mit der oben beschriebenen Vorrichtung erhöht, um einen geringeren Austrag pro Wegstrecke - also eine scheinbar niedrigere Dosiergeschwindigkeit - zu erreichen, geht dies bei komplizierten Geometrien jedoch zu Lasten der Dosiergenauigkeit.If the travel speed of a traverse is increased with the device described above in order to achieve a lower discharge per distance - ie an apparently lower dosing speed - this is at the expense of the dosing accuracy in the case of complicated geometries.

US 2011/253747 A1 offenbart eine Vorrichtung zur dynamischen Dosierung von Dichtmassen aufweisend zwei Behälter für Dichtmassenkomponenten, einen ersten Antrieb, der mit zwei Einrichtungen verbunden ist, von denen jeweils eine eine der Dichtmassenkomponenten aus ihrem Behälter fördern kann, eine Antriebssteuerung, eine Mischeinheit für das Mischen der aus den Behältern geförderten Dichtmassenkomponenten mit einer Öffnung für das Auftragen der Dichtmasse auf ein Bauteil. Mittels dieser Vorrichtung lässt sich jedoch keine hinreichende Mischgüte und Dosiergenauigkeit unabhängig von der Dosiergeschwindigkeit erreichen. U.S. 2011/253747 A1 discloses a device for the dynamic dosing of sealing compounds, having two containers for sealing compound components, a first drive, which is connected to two devices, one of which can convey one of the sealing compound components out of its container, a drive controller, a mixing unit for mixing the components from the containers funded sealant components with an opening for applying the sealant to a component. However, this device cannot be used to achieve adequate mixing quality and dosing accuracy independently of the dosing speed.

Daher war es die Aufgabe der vorliegenden Erfindung, eine Vorrichtung zur dynamischen Dosierung von Dichtmassen sowie ein entsprechendes Verfahren bereitzustellen, bei der bzw. bei dem unabhängig von der Dosiergeschwindigkeit - also auch bei niedrigen Dosiergeschwindigkeiten - eine hinreichende Mischgüte sowie Dosiergenauigkeit erreicht wird.It was therefore the object of the present invention to provide a device for the dynamic dosing of sealing compounds and a corresponding method in which adequate mixing quality and dosing accuracy are achieved independently of the dosing speed, ie even at low dosing speeds.

Diese Aufgabe wurde gelöst durch eine Vorrichtung nach Anspruch 1 sowie ein Verfahren nach Anspruch 10. Bevorzugte Ausführungsformen werden jeweils in den abhängigen Ansprüchen beschrieben.This object has been solved by an apparatus according to claim 1 and a method according to claim 10. Preferred embodiments are described in the dependent claims, respectively.

Die erfindungsgemäße Vorrichtung (1) zur dynamischen Dosierung von Dichtmassen weist zwei Behälter (2a, 2b) für Dichtmassenkomponenten, einen ersten Antrieb (3), der mit zwei Einrichtungen (4a, 4b) verbunden ist, von denen jeweils eine eine der Dichtmassenkomponenten (5a, 5b) aus ihrem Behälter (2a, 2b) fördern kann (Fördereinrichtungen), eine Antriebssteuerung (6), eine Mischeinheit (7) für das Mischen der aus den Behältern (2a, 2b) geförderten Dichtmassenkomponenten (5a, 5b) mit einer Öffnung (8) für das Auftragen der Dichtmasse (9) auf ein Bauteil sowie zusätzlich einen Ausgleichsbehälter (10) mit einem Ausgleichsvolumen (11) und einen zweiten Antrieb (12), der mit einem Kolben (13) verbunden ist, der in das Ausgleichsvolumen (11) des Ausgleichsbehälter (10) reicht, auf.The device (1) according to the invention for the dynamic dosing of sealing compounds has two containers (2a, 2b) for sealing compound components, a first drive (3) which is connected to two devices (4a, 4b), one of which each controls one of the sealing compound components (5a , 5b) from its container (2a, 2b) (conveying devices), a drive controller (6), a mixing unit (7) for mixing the sealant components (5a, 5b) conveyed from the containers (2a, 2b) with an opening (8) for applying the sealing compound (9) to a component and, in addition, a compensating tank (10) with a compensating volume (11) and a second drive (12) which is connected to a piston (13) which is inserted into the compensating volume ( 11) of the expansion tank (10) is sufficient.

Dabei ist der Ausgleichsbehälter (10) mit der Mischeinheit (7) verbunden. Durch diese Verbindung wird der Ausgleichsbehälter (10) gefüllt und entleert. Der erste und der zweite Antrieb (3, 12) können gemeinsam durch die Antriebssteuerung (6) dynamisch gesteuert werden.The expansion tank (10) is connected to the mixing unit (7). Through this Connection is the expansion tank (10) filled and emptied. The first and the second drive (3, 12) can be dynamically controlled together by the drive controller (6).

Eine erste solche, erfindungsgemäße Vorrichtung (1) ist in Abb. 2 sowie in Abb. 3 , eine zweite in Abb. 4 gezeigt, ohne dass diese Abbildungen allerdings einschränkend zu verstehen wären.A first such device (1) according to the invention is in Fig. 2 as in Fig. 3 , a second in Fig. 4 shown, but these figures should not be understood as limiting.

Unter einer "Dichtmasse" soll vorliegend stets die Mischung zweier Dichtmassenkomponenten gemeint sein.In the present case, a “sealant” should always mean the mixture of two sealant components.

Der "erste Antrieb" kann auch aus zwei separat zu steuernden Antriebseinheiten (3a, 3b) bestehen, von denen die erste mit der ersten und die zweite mit der zweiten der beiden Fördereinrichtungen (4a, 4b) verbunden ist (vgl. Abb. 4 ). Gemäß einer bevorzugten Ausführungsform besteht der erste Antrieb jedoch aus einer einzigen Antriebseinheit (3), die mit den beiden Fördereinrichtungen (4a, 4b) verbunden ist.The "first drive" can also consist of two separately controlled drive units (3a, 3b), of which the first is connected to the first and the second to the second of the two conveyor devices (4a, 4b) (cf. Fig. 4 ). According to a preferred embodiment, however, the first drive consists of a single drive unit (3) which is connected to the two conveyor devices (4a, 4b).

Einerseits kann es sich bei den "zwei Behältern für Dichtmassenkomponenten" um Vorratsbehälter (2a, 2b) handeln, d.h. um Behälter, die jeweils mit einer bestimmten Menge an Dichtmassenkomponente (5a, 5b) befüllt und dann verschlossen werden können (vgl. Abb. 2 und Abb. 3 ).On the one hand, the "two containers for sealing compound components" can be storage containers (2a, 2b), ie containers that can each be filled with a certain amount of sealing compound component (5a, 5b) and then sealed (cf. Fig. 2 and Fig. 3 ).

Andererseits kann es sich bei den "zwei Behältern für Dichtmassenkomponenten" um offene Behälter (15a, 15b) handeln, d.h. um Behälter, die jeweils kontinuierlich mit einer Dichtmassenkomponente (5a, 5b) befüllt werden können (vgl. Abb. 4 ). Auf diese Weise kann ein ununterbrochener Dichtmassestrom erreicht werden (vgl. Abb. 4 ).On the other hand, the "two containers for sealant components" can be open containers (15a, 15b), ie containers that can each be continuously filled with a sealant component (5a, 5b) (cf. Fig. 4 ). In this way, an uninterrupted flow of sealant can be achieved (cf. Fig. 4 ).

Bei der "Mischeinheit" kann es sich um einen Statikmischer, einen Dynamikmischer oder eine Kombination von beiden handeln.The "mixing unit" can be a static mixer, a dynamic mixer, or a combination of both.

Vorzugsweise handelt es sich bei dem ersten und/oder zweiten Antrieb um einen Servoantrieb, weiter bevorzugt ist der erste und der zweite Antrieb jeweils ein Servoantrieb.The first and/or second drive is preferably a servo drive, more preferably the first and the second drive are each a servo drive.

Gemäß einer ersten bevorzugten Ausführungsform handelt es sich bei den beiden Fördereinrichtungen um Kolben, von denen je einer in einen der Behälter, bei denen es sich in diesem Fall um Vorratsbehälter handelt, reicht und die entsprechende Dichtmassenkomponente herausschieben kann.According to a first preferred embodiment, the two conveying devices are pistons, one of which reaches into one of the containers, which in this case are storage containers, and can push out the corresponding sealing compound component.

Gemäß einer zweiten bevorzugten Ausführungsform handelt es sich bei den beiden Fördereinrichtungen um Pumpen, welche durch Erzeugen eines Vakuums die Dichtmassenkomponenten aus ihren Behältern ziehen können. Insbesondere sind hierfür Schneckenexzenterpumpen sowie Schöpfkolbenpumpen geeignet.According to a second preferred embodiment, the two conveying devices are pumps which can draw the sealing compound components out of their containers by generating a vacuum. Screw eccentric pumps and scoop piston pumps are particularly suitable for this.

Vor allem im Falle von Schneckenexzenterpumpen (14a, 14b) handelt es sich bei besagten Behältern um offene Behälter (15a, 15b), die jeweils kontinuierlich mit einer Dichtmassenkomponente (5a, 5b) befüllt werden können (vgl. Abb. 4).Above all in the case of eccentric screw pumps (14a, 14b), said containers are open containers (15a, 15b), which can each be continuously filled with a sealing compound component (5a, 5b) (cf. Fig. 4 ).

Bevorzugt handelt es sich bei der Mischeinheit um einen Statikmischer, insbesondere um ein statisches Mischrohr.The mixing unit is preferably a static mixer, in particular a static mixing tube.

Bei dem Ausgleichsbehälter handelt es sich bevorzugt um eine Kunststoffkartusche oder ein leicht zu reinigendes Bauteil, besonders bevorzugt um eine Kunststoffkartusche, insbesondere um eine solche aus Polyethylen (PE).The expansion tank is preferably a plastic cartridge or a component that is easy to clean, particularly preferably a plastic cartridge, in particular one made of polyethylene (PE).

Gemäß einer ersten besonders bevorzugten Ausführungsform ist die Vorrichtung (1) eine 2K Misch- und Dosieranlage wie sie beispielsweise von der Firma Hilger u. Kern (Mannheim, Deutschland) hergestellt wird. Diese Anlagen ermöglichen es, Dichtmasse (9) bestehend aus 2 Komponenten (5a, 5b) aus Vorratsbehältern (2a, 2b) zu fördern, zu mischen und zu dosieren (vgl. Abb. 2 und Abb. 3 ).According to a first particularly preferred embodiment, the device (1) is a 2-component mixing and dosing system such as that manufactured by Hilger u. Kern (Mannheim, Germany), for example. These systems make it possible to convey, mix and dose sealant (9) consisting of 2 components (5a, 5b) from storage containers (2a, 2b) (cf. Fig. 2 and Fig. 3 ).

Bei der Dichtmasse kann es sich auch um eine solche handeln, welche im Wesentlichen erst nach Bestrahlung mit aktinischer Strahlung, insbesondere mit UV Strahlung aushärtet. Eine solche Dichtmasse hat den Vorteil, dass ihre Aushärtung kontrolliert mit einem Trigger initiiert werden kann (sog. SCOD: sealant curing on demand). Die erfindungsgemäße Vorrichtung kann hierzu eine integrierte Quelle für aktinische Strahlung, insbesondere für UV-Strahlung umfassen.The sealing compound can also be one which essentially only cures after exposure to actinic radiation, in particular to UV radiation. Such a sealant has the advantage that its curing can be initiated in a controlled manner with a trigger (so-called SCOD : sealant curing on demand). For this purpose, the device according to the invention can comprise an integrated source for actinic radiation, in particular for UV radiation.

Bei dem erfindungsgemäßen Verfahren zur dynamischen Dosierung von Dichtmassen werden die Behälter (2a, 2b) der erfindungsgemäßen Vorrichtung (1) mit jeweils einer Dichtmassenkomponente (5a, 5b) befüllt (Komponenten A und B bzw. Grundmasse und Härter). Die Dichtmassenkomponenten (5a, 5b) werden dann in einer Mischeinheit (7) gemischt und die resultierende Dichtmasse (9) wird auf ein Bauteil aufgebracht, indem die Dichtmassenkomponenten (5a, 5b) mittels des ersten Antriebs (3) aus den Behältern (2a, 2b) gefördert werden.In the method according to the invention for the dynamic dosing of sealants, the containers (2a, 2b) of the device (1) according to the invention are each filled with a sealant component (5a, 5b) (components A and B or base material and hardener). The sealing compound components (5a, 5b) are then mixed in a mixing unit (7) and the resulting sealing compound (9) is applied to a component by the sealing compound components (5a, 5b) being removed from the containers (2a, 2b) are funded.

Dabei wird eine Dosiergeschwindigkeit unterhalb eines kritischen, in der Antriebssteuerung (6) voreingestellten Werts, dadurch realisiert, dass die Fördergeschwindigkeit der Dichtmassenkomponenten (5a, 5b) aus den Behältern (2a, 2b) auf den kritischen Wert der Dosiergeschwindigkeit erniedrigt wird und der Ausgleichsbehälter (10) mittels des zweiten Antriebs (12) so mit Dichtmasse (9) befüllt wird, dass die Geschwindigkeit, mit der der Ausgleichbehälter (10) befüllt wird, der Differenz des kritischen und des realisierten Wertes der Dosiergeschwindigkeit entspricht.A dosing speed below a critical value preset in the drive control (6) is achieved in that the conveying speed of the sealing compound components (5a, 5b) from the containers (2a, 2b) is reduced to the critical value of the dosing speed and the equalizing tank ( 10) is filled with sealant (9) by means of the second drive (12) in such a way that the speed at which the expansion tank (10) is filled corresponds to the difference between the critical and the realized value of the dosing speed.

Beträgt der kritische Wert der Dosiergeschwindigkeit beispielsweise 3 Volumeneinheiten Dichtmasse/Zeiteinheit, so wird eine Dosiergeschwindigkeit von beispielsweise 1 Volumeneinheit Dichtmasse/Zeiteinheit dadurch realisiert, dass die Fördergeschwindigkeit der Dichtmassenkomponenten (5a, 5b) aus den Behältern (2a, 2b) auf 3 Volumeneinheiten Dichtmasse/Zeiteinheit erniedrigt und der Ausgleichsbehälter (10) mit einer Geschwindigkeit von 2 Volumeneinheiten Dichtmasse/Zeiteinheit befüllt wird.If the critical value of the dosing speed is, for example, 3 volume units of sealant/time unit, a dosing speed of, for example, 1 volume unit of sealant/time unit is achieved by reducing the conveying speed of the sealant components (5a, 5b) from the containers (2a, 2b) to 3 volume units of sealant/time unit. Unit of time lowered and the expansion tank (10) is filled at a rate of 2 volume units of sealant / unit of time.

Abb. 2 zeigt die erfindungsgemäße Vorrichtung (1) bei einer Dosiergeschwindigkeit oberhalb des kritischen Werts. In Abb. 3 ist die Dosiergeschwindigkeit hingegen niedriger als der kritische Wert, was durch eine Verringerung der Dicke der Dichtmassenraupe (9) angedeutet ist. Das Ausgleichsvolumen (11) des Ausgleichsbehälters (10) wird in diesem Fall mit Dichtmasse befüllt. Fig. 2 shows the device (1) according to the invention at a dosing rate above the critical value. In Fig. 3 if, on the other hand, the dosing rate is lower than the critical value, this is indicated by a reduction in the thickness of the bead of sealant (9). In this case, the compensating volume (11) of the compensating tank (10) is filled with sealing compound.

Im Falle des Wiederansteigens der Dosiergeschwindigkeit auf mindestens den kritischen Wert wird die Förderung der Dichtmassenkomponenten aus den Behältern vorzugsweise solange gestoppt und die Dichtmasse mittels des zweiten Antriebs aus dem Ausgleichsbehälter gefördert, bis die Dichtmasse im Ausgleichsbehälter aufgebraucht ist. Dies trägt dazu bei, den Ausgleichsbehälter leer genug zu halten, um zu einem späteren Zeitpunkt ein erneutes Befüllen des Ausgleichsbehälters mit Dichtmasse zu ermöglichen.If the dosing rate rises again to at least the critical value, the promotion of the sealing compound components from the containers is preferably stopped and the sealing compound is conveyed out of the expansion tank by means of the second drive until the sealing compound in the expansion tank is used up. This will help keep the reservoir empty enough to allow the reservoir to be refilled with sealant at a later date.

Alternativ kann dann aber auch weiterhin die Förderung der Dichtmassenkomponenten mittels des ersten Antriebs aus den Behältern erfolgen und gleichzeitig die Dichtmasse mittels des zweiten Antriebs aus dem Ausgleichsbehälter gefördert werden, bis die Dichtmasse im Ausgleichsbehälter aufgebraucht ist. Hierdurch ist eine Erhöhung der Dosiergeschwindigkeit über den Höchstwert hinaus möglich, der mit der Vorrichtung ohne den Ausgleichsbehälter möglich wäre.Alternatively, the sealing compound components can then continue to be conveyed from the containers by means of the first drive and at the same time the sealing compound can be conveyed from the expansion tank by means of the second drive until the sealing compound in the expansion tank is used up. This makes it possible to increase the dosing speed beyond the maximum value that would be possible with the device without the expansion tank.

Claims (13)

  1. An apparatus (1) for dynamic metering of sealants, comprising
    two containers (2a, 2b) for sealant components,
    a first drive (3) which is connected to two devices (4a, 4b), each of which is able to convey one of the sealant components (5a, 5b) from its container (2a, 2b),
    a drive controller (6),
    a mixing unit (7) for mixing the sealant components (5a, 5b) conveyed from the containers (2a, 2b), having an opening (8) for applying the sealant (9) to a component,
    wherein the apparatus (1) additionally comprises a compensating container (10) with a compensating volume (11), and
    a second drive (12), which is connected to a piston (13) which reaches into the compensating volume (11) of the compensating container (10),
    where the compensating container (10) is connected to the mixing unit (7) and where the first and the second drive (3, 12) can be dynamically controlled jointly by the drive controller (6).
  2. The apparatus (1) according to claim 1, wherein the first and/or the second drive (3, 12) is in each case a servo drive.
  3. The apparatus (1) according to claim 1 or 2, wherein the two conveying devices (4a, 4b) are pistons, of which one each reaches into one of the containers (2a, 2b) for sealant components, and wherein the latter containers are reservoir containers.
  4. The apparatus (1) according to claim 1 or 2, wherein the two conveying devices are pumps, more particularly eccentric screw pumps (14a, 14b) or scoop piston pumps.
  5. The apparatus (1) according to claim 4, wherein the two conveying devices are eccentric screw pumps (14a, 14b) and the containers for sealant components are open containers (15a, 15b) which can each be filled continuously with a sealant component (5a, 5b) .
  6. The apparatus (1) according to any of the preceding claims, wherein the mixing unit (7) is a static mixer.
  7. The apparatus (1) according to any of the preceding claims, wherein the compensating container (10) is a plastic cartridge or a component that is easy to clean.
  8. The apparatus (1) according to any of the preceding claims, wherein the apparatus (1) is a 2-component mixing and metering system.
  9. The apparatus (1) according to any of the preceding claims, wherein it comprises an integrated source of actinic radiation.
  10. A method for dynamic metering of sealants, wherein the containers (2a, 2b) of the apparatus (1) according to any of the preceding claims are each filled with one sealant component (5a, 5b), wherein the sealant components (5a, 5b) are mixed in a mixing unit (7), and wherein the resultant sealant (9) is applied to a component, by conveying the sealant components (5a, 5b) from the containers (2a, 2b) by means of the first drive (3), where a metering rate below a critical value preset in the drive controller (6) is actualized by lowering the conveying rate of the sealant components (5a, 5b) from the containers (2a, 2b) to the critical value of the metering rate, and
    filling the compensating container (10) with sealant (9) by means of the second drive (12) in such a way that the rate at which the compensating container (10) is filled corresponds to the difference between the critical value and the actualized value of the metering rate.
  11. The method according to claim 10, wherein, in the event of the metering rate climbing again to at least the critical value, the conveying of the sealant components (5a, 5b) from the containers (2a, 2b) is halted, and the sealant (9) is conveyed from the compensating container (10) by means of the second drive (12), until the sealant (9) in the compensating container (10) is used up.
  12. The method according to claim 10, wherein, in the event of the metering rate climbing again to at least the critical value, the conveying of the sealant components (5a, 5b) from the containers (2a, 2b) by means of the first drive (3) and of the sealant (9) from the compensating container (10) by means of the second drive (12) takes place simultaneously until the sealant (9) in the compensating container (10) is used up.
  13. The method according to any of claims 10 to 12, wherein the sealant (9) is a sealant which cures substantially only after irradiation with actinic radiation.
EP17762112.5A 2016-09-13 2017-09-05 Device and method for dynamic metering of sealing compounds Active EP3512640B1 (en)

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DE102016217429 2016-09-13
DE102016224655 2016-12-12
PCT/EP2017/072215 WO2018050482A1 (en) 2016-09-13 2017-09-05 Device and method for dynamic metering of sealing compounds

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JP (1) JP6999676B2 (en)
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JP6999676B2 (en) 2022-02-04
JP2019532813A (en) 2019-11-14
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BR112019003551B1 (en) 2022-09-20
CN109789436A (en) 2019-05-21
CA3036589A1 (en) 2018-03-22
US11059070B2 (en) 2021-07-13
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CN109789436B (en) 2021-07-09
BR112019003551A2 (en) 2019-05-28

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