EP2730342B1 - Hot melt glue applicator and a system with such a glue applicator and a glue stick - Google Patents

Hot melt glue applicator and a system with such a glue applicator and a glue stick Download PDF

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Publication number
EP2730342B1
EP2730342B1 EP13191899.7A EP13191899A EP2730342B1 EP 2730342 B1 EP2730342 B1 EP 2730342B1 EP 13191899 A EP13191899 A EP 13191899A EP 2730342 B1 EP2730342 B1 EP 2730342B1
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Prior art keywords
glue
spring means
heating
feed direction
stick
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EP13191899.7A
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German (de)
French (fr)
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EP2730342A1 (en
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Ingo Steinel
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Steinel GmbH and Co KG
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Steinel GmbH and Co KG
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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
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00523—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes provided with means to heat the material
    • B05C17/00526—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes provided with means to heat the material the material being supplied to the apparatus in a solid state, e.g. rod, and melted before application
    • 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
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00523—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes provided with means to heat the material
    • B05C17/00526—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes provided with means to heat the material the material being supplied to the apparatus in a solid state, e.g. rod, and melted before application
    • B05C17/0053—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes provided with means to heat the material the material being supplied to the apparatus in a solid state, e.g. rod, and melted before application the driving means for the material being manual, mechanical or electrical
    • B05C17/00533—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes provided with means to heat the material the material being supplied to the apparatus in a solid state, e.g. rod, and melted before application the driving means for the material being manual, mechanical or electrical comprising a piston

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)

Description

Die vorliegende Erfindung betrifft ein Heizklebegerät, insbesondere eine Heizklebepistole, nach dem Oberbegriff des Anspruchs 1 sowie ein System mit einem solchen Heizklebegerät und einem Kleberstab.The present invention relates to a Heizklebegerät, in particular a Heizklebepistole, according to the preamble of claim 1 and a system with such Heizklebegerät and a stick of adhesive.

Aus dem Stand der Technik sind Heizklebegeräte bekannt, bei denen ein (Heiz-)Kleberstab, der aus festem Klebemittel besteht und üblicherweise in seiner Außenkontur eine im Wesentlichen zylindrische Form aufweist, durch Führungsmittel geführt wird. Im Betrieb des Heizklebegeräts wird der Kleberstab durch eine Vorschubkraft, insbesondere verursacht durch ein manuelles Betätigen eines Vorschubmechanismus durch eine Bedienperson, in eine Vorschubrichtung zu Heizmitteln geführt, an welchen ein den Heizmitteln zugeordneter Abschnitt des Kleberstabes aufgeschmolzen und hierdurch verflüssigt wird, wobei der verflüssigte Klebstoff an einer Auslassspitze des Heizklebegerät aus dem Heizklebegerät austritt. Die Menge des austretenden Klebstoffes kann durch die Vorschubkraft, und somit die Menge des verflüssigten Klebstoffes reguliert werden. Problematisch ist hierbei, dass selbst wenn keine Vorschubkraft auf den Kleberstab wirkt, bereits verflüssigter Klebestoff aus dem Heizklebegerät austreten kann, was unerwünschte Verklebungen außerhalb des Heizklebegerätes mit sich führen kann.Heizklebegeräte are known in the prior art, in which a (heating) adhesive rod, which consists of solid adhesive and usually in its outer contour has a substantially cylindrical shape, is guided by guide means. In operation of the Heizklebegeräts the adhesive rod is guided by a feed force, in particular caused by a manual actuation of a feed mechanism by an operator in a feed direction to heating means to which a heating means associated portion of the adhesive rod is melted and thereby liquefied, wherein the liquefied adhesive to an outlet tip of the Heizklebegerät emerges from the Heizklebegerät. The amount of the exiting adhesive can be regulated by the feed force, and thus the amount of the liquefied adhesive. The problem here is that even if no feed force acts on the adhesive rod, already liquefied adhesive can escape from the Heizklebegerät what unwanted bonding can lead outside the Heizklebegerätes with it.

Im Stand der Technik kommen, beispielsweise in der DE 201 03 649 U1 der Anmelderin, deshalb Rückschlagventile an der Auslassspitze zum Einsatz, die dafür Sorge tragen, dass Klebstoff nur austritt, wenn eine ausreichende Vorschubkraft aufgebracht wird. Diese Rückschlagventile haben jedoch wiederum den Nachteil, dass dadurch, dass der verflüssigte Klebstoff nach Abschalten der Heizmittel sich wieder verfestigt, es zu Verstopfungen an dem Rückschlagventil kommen kann, welche nur durch ein manuelles Reinigen der Rückschlagventile behoben werden können.Come in the art, for example in the DE 201 03 649 U1 Applicant, therefore check valves at the outlet tip used to ensure that adhesive exits only when sufficient feed force is applied. However, these check valves again have the disadvantage that the fact that the liquefied adhesive solidifies again after switching off the heating means, it to Blockages may occur at the check valve, which can only be remedied by a manual cleaning of the check valves.

Die Druckschrift EP 0 381 440 A2 offenbart ein Heizklebegerät mit einem Zuführmechanismus um einen Feststoffkörper einer Schmelzkammer zuzuführen. Der Zuführmechanismus umfasst eine Rückzugsvorrichtung zum geringfügigen Verschieben des Körpers in eine zurückgezogene Position im Anschluss an eine Ausstoßbetätigung. Der Zuführmechanismus hat eine Entlastungsvorrichtung um es dem Körper zu ermöglichen nach der Bewegung in die zurückgezogene Position freizustehen, um zusätzlichen Raum für geschmolzenes Material in der Schmelzkammer aufgrund thermaler Ausdehnung des Materials vorzusehen.The publication EP 0 381 440 A2 discloses a Heizklebegerät with a feed mechanism to supply a solid body of a melting chamber. The feeding mechanism includes a retraction device for slightly shifting the body to a retracted position following an ejection operation. The feeding mechanism has a relief device to allow the body to rest after movement to the retracted position to provide additional space for molten material in the melting chamber due to thermal expansion of the material.

Aufgabe der vorliegenden Erfindung ist es eine einfache und kostengünstige Lösung zur Rückführung eines Klebestabs in einem Heizklebegerät anzugeben, um nach einer durch eine Vorschubkraft bewirkte Ausstoßbetätigung verflüssigten Klebstoffs zu gewährleisten, dass bei einem Verschwinden der Vorschubkraft kein bereits verflüssigter Klebstoff aus dem Heizklebegerät austritt. Zudem sollte die Aufgabe zugrunde liegen die Defektwahrscheinlichkeit bzw. die Anfälligkeit der Vorrichtung insbesondere durch eine Reduzierung der Anzahl von Komponenten zu realisieren, um dadurch eine erhöhte Lebensdauer eines Heizklebegeräts und ein Verkleben durch rückverfestigten Klebstoffs zu erreichen.Object of the present invention is to provide a simple and inexpensive solution for returning a stick in a Heizklebegerät to ensure after a caused by a feed force ejection operation liquefied adhesive that when a disappearance of the feed force no already liquefied adhesive exits the Heizklebegerät. In addition, the object should be based on the probability of failure or the susceptibility of the device to realize in particular by reducing the number of components, thereby achieving an increased life of a Heizklebegeräts and bonding by reconsolidated adhesive.

Erfindungsgemäß umfassen die Führungsmittel des Heizklebegeräts Federmittel, die als elastisches Element aus einem Elastomer so ausgebildet und angeordnet sind, dass durch Krafteinwirkung einer in die Vorschubrichtung auf den Anlageabschnitt wirkenden Vorschubkraft durch elastische Verformung eine Rückstellkraft in den Federmitteln aufgebaut wird, die entgegen der Vorschubrichtung auf den Anlageabschnitt wirkt, um diesen zur Ausgangsposition zurück zu führen. Wird in diesen Führungsmitteln ein Kleberstab geführt, so wird durch ein Vorschieben des Kleberstabes in die Vorschubrichtung, eine Rückstellkraft in den Federmitteln aufgebaut. Nimmt die Vorschubkraft (vom Betrag her) unter die Rückstellkraft ab, beispielsweise, indem der Benutzer einen entsprechenden Vorschubmechanismus nicht mehr betätigt, so wird der Kleberstab entgegen der Vorschubrichtung zurück geführt. Hierdurch wird es ermöglicht, dass verflüssigter Klebstoff durch Materialschluss mit dem Kleberstab und/oder Unterdruck im Heiz- bzw. Aufschmelzbereich in das Innere des Heizklebegeräts gezogen wird, und
somit einem Austreten von verflüssigtem Klebstoffes entgegen gewirkt wird, ohne dass ein Rückschlagventil zum Einsatz kommt, wodurch konstruktiv auf besonders einfache und robuste Weise eine Verklebungsgefahr und die damit verbundene Beeinträchtigung der Funktionalität des Heizklebegeräts gemindert wird.According to the invention, the guide means of the hot-melt adhesive device comprise spring means which are designed and arranged as an elastic element made of an elastomer so that a restoring force is built up in the spring means by the action of a feed force acting on the contact section in the feed direction by elastic deformation is, which acts counter to the feed direction on the contact section, in order to lead this back to the starting position. If an adhesive rod is guided in these guide means, a restoring force is built up in the spring means by advancing the adhesive rod in the feed direction. If the feed force (in terms of amount) decreases below the restoring force, for example because the user no longer actuates a corresponding feed mechanism, the adhesive bar is guided back against the feed direction. This makes it possible that liquefied adhesive is drawn by material connection with the adhesive rod and / or negative pressure in the heating or Aufschmelzbereich into the interior of Heizklebegeräts, and
Thus, a leakage of liquefied adhesive is counteracted without a check valve is used, which constructively in a particularly simple and robust way a bonding risk and the associated impairment of the functionality of the Heizklebegeräts is reduced.

Die Ausbildung als elastisches Element aus einem Elastomer, insbesondere aus Silikon, Gummi und/oder synthetischem Kautschuk, wird beim Vorschieben des Kleberstabes durch den Kleberstab so elastisch verformt wird, dass durch den Verformungswiderstand die Rückstellkraft, die in eine Richtung entgegen der Vorschubkraft wirkt, auf den am Kleberstab anliegenden Anliegeabschnitt aufgebaut wird. Der Einsatz eines solchen elastischen Elements hat, insbesondere gegenüber mechanischen Lösungen, den Vorteil, dass diese gegenüber Belastungen besonders robust sind und ihre Funktionalität schwer durch Verklebungen durch rückverfestigten Klebstoff beeinträchtigt werden kann. Auch sind die Federmittel in dieser Ausbildung einfach und kostengünstig als Formteile herstellbar. Bevorzugt weist das elastische Element eine Shorehärte zwischen 30 und 100 Shore, besonders bevorzugt zwischen 50 und 70 Shore, auf, da sich hierdurch besonders günstige Werte für die Reibe- und/oder Rückstellkraft erzielen lassen.The training as an elastic element made of an elastomer, in particular of silicone, rubber and / or synthetic rubber, is elastically deformed during advancement of the adhesive rod by the adhesive rod, that by the deformation resistance, the restoring force acting in a direction opposite to the feed force on is built up the voltage applied to the adhesive rod abutting portion. The use of such an elastic element has, in particular over mechanical solutions, the advantage that they are particularly robust against burdens and their functionality can be difficult to adversely affected by bonding by reconsolidated adhesive. Also, the spring means in this design are simple and inexpensive to produce as moldings. The elastic element preferably has a Shore hardness of between 30 and 100 Shore, particularly preferably between 50 and 70 Shore, since this allows particularly favorable values for the friction and / or restoring force to be achieved.

Als besonders vorteilhaft hat es sich herausgestellt, den Kleberstab durch eine im wesentlichen konischen Aussparung, die sich bevorzugt in einem Winkel zwischen 0° und 30°, besonders bevorzugt zwischen 5° und 10 aufweitet, und/oder eine einen Lippenabschnitt ausbildende Aussparung der Federmittel aufzunehmen, wobei diese Aussparungen den Anlageabschnitt mit ausbildet. Ein solcher Konus und/oder eine solche Lippe hat den Vorteil, dass der, insbesondere als Ring- und/oder Linienabschnitt ausgebildete Anlageabschnitt in seiner Ausdehnung in Vorschubrichtung minimiert wird, wodurch bei ansonsten identischen Führungsmitteln die Kraft pro Fläche im Anlageabschnitt vergrößert wird und somit eine sicheres Anliegen der Führungs- und Federmittel an dem Kleberstab während der Führung und/oder Rückstellung gesichert wird, wobei, im Gegensatz zu einer schmalen Ringförmigen Ausgestaltung der Federmittel (mit einer im zylindrischen Aussparungsform), gleichzeitig der Verformungswiderstand eines dickeren Abschnittes der Federmittel genutzt werden.To be particularly advantageous, it has been found, the adhesive rod by a substantially conical recess which preferably widens at an angle between 0 ° and 30 °, more preferably between 5 ° and 10, and / or record a lip portion forming recess of the spring means , These recesses forms the contact section with. Such a cone and / or such a lip has the advantage that the, in particular designed as a ring and / or line section contact portion in its extension in Feed direction is minimized, thereby increasing the force per surface area in the contact section with otherwise identical guide means and thus a secure concern of the guide and spring means is secured to the adhesive rod during the leadership and / or provision, wherein, in contrast to a narrow annular configuration of Spring means (with a cylindrical recess shape), at the same time the deformation resistance of a thicker portion of the spring means are used.

Besonders bevorzugt weitet sich die Aussparung in Vorschubrichtung auf. Hierdurch wird ein vorteilhafte elastische Verformung der Federmittel ermöglicht, bei der sich insbesondere der Anlageabschnitt ungehindert in den ausgesparten Bereich bewegen kann, wodurch eine Gehäusebauweise ermöglicht wird, in der die Federmittel in ihrer äußersten Auslenkung in (und/oder entgegen) der Vorschubrichtung dauerhaft fest begrenzt werden könnenParticularly preferably, the recess widens in the feed direction. As a result, an advantageous elastic deformation of the spring means is made possible, in particular, the contact portion can move freely in the recessed area, whereby a housing construction is made possible in which the spring means in its outermost deflection in (and / or counter) permanently limited the feed direction can be

Die Reibe- und Rückstellkraft sollten durch geeignete Wahl der Materialien und Dimensionierung, insbesondere des Konus und/oder der Lippe, so bemessen sein, dass zum Rückstellen des Kleberstabes durch Verformung des elastischen Elements eine ausreichende Rückstellkraft erreicht wird, die Reibekraft jedoch nicht zu groß ist, um ein Vorschieben des Kleberstabes zu blockieren oder nur mit erheblichem Kraftaufwand zu ermöglichen, was insbesondere einer Möglichkeit der feinfühligen Dosierung entgegen wirken würde.By means of a suitable choice of materials and dimensions, in particular of the cone and / or the lip, the friction and restoring force should be dimensioned such that a sufficient restoring force is achieved for resetting the adhesive rod by deformation of the elastic element, but the frictional force is not too great in order to block advancement of the adhesive rod or to enable only with considerable force, which would counteract especially a possibility of sensitive dosage.

Die erfindungsgemäßen Führungsmittel sind bevorzugt im Heizklebegerät in Vorschubrichtung in einem Abstand von mindestens 1 cm, weiter bevorzugt mindestens 2 cm, besonders bevorzugt mindestens 3 cm, und/oder in einem Abstand, der mindestens dem doppelten, bevorzugt dem fünffachen, Durchmesser des verwendeten Kleberstabes entspricht, vor den Heizmitteln angeordnet. Der Anlageabschnitt liegt somit deutlich vor den Heizmitteln am Kleberstab an, der in dieser Position nicht von Heizmitteln erwärmt und somit verflüssigt oder zumindest aufgeweicht wurde, wodurch zum einen eine gute Führungs- und/oder Rückstellwirkung der Führungsmittel gewährleistet wird und zum anderen die Nachteilen, die durch Verklebung des sich abkühlenden Klebstoffes entstehen könnten, nicht auftreten.The guide means according to the invention are preferably in Heizklebegerät in the feed direction at a distance of at least 1 cm, more preferably at least 2 cm, more preferably at least 3 cm, and / or at a distance corresponding to at least twice, preferably five times, the diameter of the adhesive rod used . arranged in front of the heating means. The contact section is thus clearly in front of the heating means on the adhesive rod, which is not heated in this position by heating means and thus liquefied or at least softened, whereby on the one hand a good guiding and / or restoring action of the guide means is ensured and on the other hand, the disadvantages could occur due to adhesion of the cooling adhesive, do not occur.

Der Innendurchmesser des vom Anlageabschnitt der Führungsmittel eingeschlossene Aufnahmebereichs in einem freien Zustand, in dem kein Kleberstab im Aufnahmebereich aufgenommen ist, ist hierbei bevorzugt in mindestens einer radialen Richtung (also einer Richtung senkrecht zur Vorschubrichtung) kleiner als der Außendurchmesser des Klebestiftes. Durch ein solches Untermaß bzw. eine solche Presspassung wird ein festes Anliegen der Federmittel am Klebestift sichergestellt, wodurch wiederum der Anlageabschnitt beim Vorschieben des Kleberstabes in Vorschubrichtung sicher mit geführt wird.The inner diameter of the receiving region enclosed by the contact section of the guide means in a free state, in which no adhesive rod is received in the receiving region, is preferably smaller than the outer diameter of the glue stick in at least one radial direction (ie, a direction perpendicular to the feed direction). By such an undersize or such a press fit a firm concern of the spring means on the glue stick is ensured, which in turn the contact section when feeding the adhesive rod in the feed direction is sure to be performed.

Vorzugsweise liegt der Anlageabschnitt umfangsgeschlossen am Kleberstab an. Hierdurch können die Führungsmittel Kräfte auf den Kleberstab in jede radiale Richtung aufnehmen und diesen somit sicher führen. Zusätzlich können hierdurch, insbesondere bei Ausbildung der Federmittel durch ein elastisches Element aus einem Elastomer wie beispielsweise einer Silikon-Manschette, eine Dichtwirkung erzielt werden und/oder die Dichtmittel mit ausgebildet werden.Preferably, the contact portion is circumferentially closed on the adhesive rod. As a result, the guide means can absorb forces on the adhesive rod in any radial direction and thus lead them safely. In addition, in this way, in particular when the spring means are formed by an elastic element made of an elastomer such as a silicone sleeve, a sealing effect can be achieved and / or the sealing means can be formed.

Die Außenkontur des Kleberstabes weist insbesondere eine zylindrische Außenkontur auf, deren Durchmesser zwischen 0 cm und 2 cm, bevorzugt zwischen 0,5 cm und 1 cm beträgt.The outer contour of the adhesive rod has in particular a cylindrical outer contour whose diameter is between 0 cm and 2 cm, preferably between 0.5 cm and 1 cm.

Die erfindungsgemäße Ausbildung des Heizklebegeräts trägt auf besonders synergistische Weise zu einer großserientauglichen Herstellung von entsprechenden Heizklebegeräten bei, da das der Erfindung zugrunde liegende Problem auf besonders einfache Weise, durch den Einsatz von kostengünstig herstellbaren Elementen, gelöst wird, wobei diese ohne manuelles Zutun oder fehleranfällige Anpass- und/oder Kontrollmechanismen automatisiert in den Gerätegehäusen, insbesondere automatisiert hergestellten Spritzgussgehäusen, angeordnet werden können. Insbesondere bei der Ausbildung der Federmittel durch ein elastisches Element aus einem Elastomer, zeichnet sich die erfindungsgemäße Lösung auch durch ihre Robustheit bei gleichzeitig leichter Bauweise aus. Eine solche leichte und robuste Bauweise eignet sich insbesondere für portable Heizgeräte, die nicht über Kabelverbindungen oder dergleichen mit Netzspannung betrieben werden, sondern bei denen die Stromversorgung der Heizmittel durch im Gerät angeordnete Stromspeichermittel, beispielsweise Akkumulatoren, erfolgt.The inventive design of the Heizklebegeräts contributes in a particularly synergistic manner to a large-scale production of appropriate Heizklebegeräten because the problem underlying the invention is solved in a particularly simple manner, by the use of cost-producible elements, which without manual intervention or error-prone fitting - And / or control mechanisms automatically in the device housings, in particular automated injection molded housings, can be arranged. In particular, in the formation of the spring means by an elastic member made of an elastomer, the solution according to the invention is also characterized by its robustness and at the same time lightweight construction. Such a lightweight and robust design is particularly suitable for portable heaters that are not operated via cable connections or the like with mains voltage, but in which the power supply of the heating means by arranged in the device power storage means, such as accumulators occurs.

Zusätzlich hat es sich als vorteilhaft herausgestellt, an der Außenkontur der Federmittel einen Absatz oder Kragen, insbesondere einen Ringkragen, vorzusehen. Dieser kann durch Anlage an Stoßkanten des Gehäuses, welche bevorzugt durch einstückig mit den Gehäuse ausgebildeten Mittel zum Halten und/oder Einsetzen ausgebildet werden, in oder entgegen der Vorschubrichtung wirkende Kräfte aufnehmen und die Positionierung der Federmittel im Gehäuse sichern. Zusätzlich dient die Stoßkante in Zusammenwirkung mit den bevorzugten, einstückig mit den Gehäuse ausgebildeten Mittel zum Halten und/oder Einsetzen, bei einer bevorzugten nicht symmetrischer Anordnung (in Vorschubrichtung) als eine Verdrehsicherung bei der Herstellung des Heizklebegerätes bzw. beim Einsetzen der Federmittel in das Gerätegehäuse, wodurch insbesondere die richtige Ausrichtung des konischen Aufnahmebereichs und/oder des Lippenabschnitts sicher gestellt ist.In addition, it has been found to be advantageous to provide a shoulder or collar, in particular an annular collar, on the outer contour of the spring means. This can by abutment against abutting edges of the housing, which are preferably formed by integrally formed with the housing means for holding and / or insertion, record in or against the feed direction acting forces and secure the positioning of the spring means in the housing. In addition, the butting edge, in cooperation with the preferred means for holding and / or inserting integral with the housing, in a preferred non-symmetrical arrangement (in the advancing direction) serves as an anti-rotation device in the manufacture of the heating adhesive device or upon insertion of the spring means into the device housing , whereby in particular the correct alignment of the conical receiving area and / or the lip portion is ensured.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele sowie anhand der Zeichnungen. Diese zeigen in:

Fig. 1a
Federmittel zum Einsatz in einem erfindungsgemäßen Heizklebegeräts in einer Draufsicht,
Fig. 1b
die Federmittel aus Fig. 1 a in einer Schnittansicht (A-A),
Fig. 2
ein Ausschnitt einer Seitenansicht eines Ausführungsbeispiel eines erfindungsgemäßen Heizklebegeräts mit Federmitteln gem. Fig. 1a und 1b bei geöffnetem Gehäuse.
Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawings. These show in:
Fig. 1a
Spring means for use in a Heizklebegeräts invention in a plan view,
Fig. 1b
the spring means off Fig. 1 a in a sectional view (AA),
Fig. 2
a section of a side view of an embodiment of a Heizklebegeräts invention with spring means acc. Fig. 1 a and 1b with the housing open.

Die in Fig. 1a und 1b gezeigten Federmittel 10 sind als einstückiges elastisches Element in Form einer Silikonmanschette ausgebildet. In ihrem Inneren weisen die Federmittel eine im Wesentlichen konische Aussparung 14 zur Aufnahme eines (nicht dargestellten) Kleberstabes 30 auf. Die konische Aussparung 14, welche sich in Vorschubrichtung in einem Winkel von ca. 5° aufweitet, wird von einem Anlageabschnitt 16, der zum mantelseitigen Anlegen an den Kleberstab vorbestimmt ist, mit begrenzt.In the Fig. 1 A and 1b shown spring means 10 are formed as a one-piece elastic element in the form of a silicone sleeve. In their interior, the spring means have a substantially conical recess 14 for receiving an adhesive rod 30 (not shown). The conical recess 14, which widens in the feed direction at an angle of approximately 5 °, is limited by a contact portion 16, which is predetermined for the shell-side application to the adhesive rod.

In dem hier gezeigten entspannten bzw. freien Zustand, in dem kein Kleberstab 30 im in der Aussparung 14 aufgenommen ist, ist der Innendurchmesser 18 des vom Anlageabschnitt 16 eingeschlossenen Aufnahmebereichs kleiner als der Außendurchmesser eines zu verwendenden Kleberstabes 30, welcher in seiner Außenkontur eine im Wesentlichen zylindrische Form aufweist.In the relaxed or free state shown here, in which no adhesive rod 30 is received in the recess 14, the inner diameter 18 of the receiving region enclosed by the bearing portion 16 is smaller than the outer diameter of an adhesive rod 30 to be used, which in its outer contour is substantially has cylindrical shape.

Die Federmittel 10 weisen in ihrer Außenkontur einen Ringkragen 12 auf, der über die restlichen Federmittel 10 hinausragt.The spring means 10 have in their outer contour an annular collar 12 which projects beyond the remaining spring means 10.

Das in Fig. 2 gezeigte Heizklebegerät umfasst in einem Gehäuse Federmittel 10 als Führungsmittel 11, die entsprechend den Fig. 1a und 1b als elastisches Element aus Silikon ausgebildet sind. In der konischen Aussparung 14 ist ein Kleberstabes 30 aufgenommen, wobei die Federmittel 10 an einem (hier nicht dargestellten) Anlageabschnitt 16, der die konische Aussparung mit begrenzt, an dem Kleberstab anliegen.This in Fig. 2 shown Heizklebegerät comprises in a housing spring means 10 as a guide means 11, which according to the Fig. 1a and 1b are formed as an elastic element made of silicone. In the conical recess 14, an adhesive rod 30 is received, wherein the spring means 10 on a (not shown here) contact portion 16, which limits the conical recess, abut the adhesive rod.

Die Federmittel 10 werden in Vorschubrichtung durch den Ringkragen 12 gegenüber dem Gehäuse in Zusammenwirkung mit einstückig mit dem Gehäuse ausgebildeten Mitteln zum Halten in Form einer negativen Passform in ihrer Position gesichert. Zudem sichert die in Vorschubrichtung nicht symmetrische Formgebung der Federmittel, insbesondere durch den Ringkragen 12, zusammen mit der negativen Passform die richtige Ausrichtung der Federmittel 10 und somit die richtige Ausrichtung der konischen Aussparung 14.The spring means 10 are secured in the feed direction by the annular collar 12 with respect to the housing in cooperation with integrally formed with the housing means for holding in the form of a negative fit in position. In addition, the not symmetrical in the feed direction shaping of the spring means, in particular by the annular collar 12, together with the negative fit ensures the correct alignment of the spring means 10 and thus the correct orientation of the conical recess 14th

Den Federmitteln 10 in Vorschubrichtung R nachgelagert sind Dichtmittel 40, anschließend Heizmittel 50, die einen Heiz- und/oder Aufschmelzbereich umschließen. Den Heizmitteln 50 ist weiter in Vorschubrichtung R eine Auslassspitze 60 nachgelagert.Downstream of the spring means 10 in the feed direction R are sealing means 40, then heating means 50 which enclose a heating and / or melting region. The heating means 50 is further downstream of an outlet tip 60 in the feed direction R.

Bei Benutzung des Heizklebegeräts wird der Kleberstab 30 in Vorschubrichtung zu den Heizmitteln geführt, um dort aufgeschmolzen zu werden und anschließend durch die Auslassspitze 60 nach außen zu treten. Beim Vorschieben wird die Position des Kleberstabes 30 senkrecht zur Vorschubrichtung R durch die Führungsmittel 11 festgelegt. Da der Innendurchmesser 18 des vom Anlageabschnitt 16 eingeschlossenen Aufnahmebereichs kleiner als der Außendurchmesser des Kleberstabes 30, liegen die Federmittel 10 fest an dem Kleberstab 30 an. Durch die Bewegung des Kleberstabes 30 in Vorschubrichtung entsteht im Anlageabschnitt 16 der Federmittel 10 eine Kraft, die den Anlageabschnitt 16 in Vorschubrichtung mit zieht, wodurch die Federmittel 10 sich so elastisch verformen, dass eine Rückstellkraft entgegen der Vorschubrichtung R aufgebaut wird, um diesen zur Ausgangsposition zurück zu führen. Sinkt die Vorschubkraft auf den Anlageabschnitt 16 unter diese Rückstellkraft, so wird er in die ursprüngliche Position zurück geführt.When using the Heizklebegeräts the adhesive rod 30 is guided in the feed direction to the heating means to be melted there and then to pass through the outlet tip 60 to the outside. When advancing the position of the adhesive rod 30 is set perpendicular to the feed direction R by the guide means 11. Since the inner diameter 18 of the receiving portion enclosed by the receiving portion 16 is smaller than the outer diameter of the adhesive rod 30, the spring means 10 are firmly against the adhesive rod 30. By the movement of the adhesive rod 30 in the feed direction is formed in the contact portion 16 of the spring means 10, a force that pulls the contact portion 16 in the feed direction, whereby the spring means 10 deform so elastically that a restoring force against the feed direction R is built to this to the starting position to lead back. If the feed force on the contact section 16 drops below this restoring force, it is returned to the original position.

Durch die Reibung zwischen dem Kleberstab 30 und dem Anlageabschnitt 16 wird der Kleberstab 30 hierdurch entgegen der Vorschubrichtung 30 zurück geführt, wobei bereits verflüssigter Klebstoff durch Materialschluss zurück in den Heiz- und/oder Aufschmelzbereich geführt wird. Zusätzlich entsteht durch die Abdichtung 40 beim Rückführen des Kleberstabes 30 ein Unterdruck in dem Heiz- bzw. Aufschmelzbereich der zusätzlich verflüssigten Klebstoff zurück führt.As a result of the friction between the adhesive rod 30 and the abutment portion 16, the adhesive rod 30 is thereby guided back against the advancing direction 30, wherein already liquefied adhesive is guided back into the heating and / or reflow region by material connection. In addition, a negative pressure in the heating or melting area of the additionally liquefied adhesive is caused by the seal 40 during the return of the adhesive rod 30.

Claims (11)

  1. Hot glue applicator, in particular hot glue gun, having guide means (11) arranged in an applicator housing for guiding a glue stick (30) in a forward-feed direction (R) towards a heating and/or melting region, in which heating means (50) for melting the glue stick (30) at least in sections are provided, wherein the guide means (11) comprise an abutment portion (16) for the shell-sided abutment on the glue stick (30) and for guiding the glue stick (30) in the forward-feed direction (R),
    characterized in that
    the guide means (11) include spring means (10) formed as an elastic element made of an elastomer, in particular of silicone, rubber and/or synthetic natural rubber, and which are arranged and configured in such a way that a restoring force is produced in the spring means (10) by means of a force acting on the abutment portion (16) in the forward-feed direction (R) due to elastic deformation, said force acting on the abutment portion (16) against the forward-feed direction.
  2. Hot glue applicator according to claim 1,
    characterized in that
    the material of the elastic element has a shore hardness between 30 and 100 shore, preferably between 50 and 70 shore.
  3. Hot glue applicator according to claim 1 or 2,
    characterized in that
    a conic recess (14) and/or a lip portion for receiving the glue stick (30) is provided in the guide means (11), in particular in the spring means (10), wherein these preferably widen in the forward-feed direction.
  4. Hot glue applicator according to one of the preceding claims,
    characterized in that
    the spring means (10) are arranged at a predefined distance in front of the heating means (50) in the forward-feed direction (R), which is at least 1 cm, further preferred at least 2 cm, and very particularly preferred at least 3 cm.
  5. Hot glue applicator according to one of the preceding claims,
    characterized in that
    the spring means (10) comprise a step or collar, in particular an annular collar (12) in the outer periphery.
  6. Hot glue applicator according to one of the preceding claims,
    characterized in that
    the applicator housing is configured as a plastic housing, in particular an injection-molded housing, which is provided with means integrally-placed thereon for holding and/or inserting the elastic element.
  7. Hot glue applicator according to one of the preceding claims,
    characterized in that
    a power storage is provided in the housing in order to implement a wireless portable device, said storage being connected to the heating means (50) in a electrically-conductive manner.
  8. A system having a hot glue applicator according to one of the preceding claims and having a glue stick (30).
  9. The system according to claim 8,
    characterized in that
    sealing means (40) are provided, which are configured and arranged in such a way that by returning the glue stick (30) by means of the restoring force of the spring means (10), a negative pressure is produced in the heating and/or melting region, said negative pressure pulling liquified glue located in an outlet tip (60) arranged downstream the heating and/or melting region in the feed-forward direction into the melting region against the feed-forward direction.
  10. The system according to claim 8 or 9,
    characterized in that
    the abutment portion (16) of the guiding means (11) rests against the glue stick (30) in such a way that a sealing effect is achieved, in particular with respect to the heating and/or melting region.
  11. The system according to one of claims 9 to 10,
    characterized in that
    a free inner diameter (18) of the abutment portion (16) with respect to a cylindric outer contour of the glue stick (30) to be guided forms an undersize and/or a press-fit allowing a predetermined sliding.
EP13191899.7A 2012-11-07 2013-11-07 Hot melt glue applicator and a system with such a glue applicator and a glue stick Active EP2730342B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012110680.0A DE102012110680A1 (en) 2012-11-07 2012-11-07 Heizklebegerät and a system with such a Heizklebegerät and a stick of adhesive

Publications (2)

Publication Number Publication Date
EP2730342A1 EP2730342A1 (en) 2014-05-14
EP2730342B1 true EP2730342B1 (en) 2017-12-20

Family

ID=49554052

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13191899.7A Active EP2730342B1 (en) 2012-11-07 2013-11-07 Hot melt glue applicator and a system with such a glue applicator and a glue stick

Country Status (2)

Country Link
EP (1) EP2730342B1 (en)
DE (1) DE102012110680A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021261628A1 (en) * 2020-06-26 2021-12-30 오철환 Free-size stick glue gun

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110604357B (en) * 2018-06-14 2022-07-22 广州碧绿丝生物科技有限公司 Wig bonding device and wig bonding method

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Publication number Priority date Publication date Assignee Title
US4951846A (en) * 1989-02-02 1990-08-28 Minnesota Mining And Manufacturing Company Hot melt applicator with anti-drip mechanism
DE20015373U1 (en) 2000-09-05 2000-12-21 Steinel Gmbh & Co Kg Adhesive cartridge
TW493537U (en) * 2001-06-15 2002-07-01 Gene Yu Ent Ltd Structure for heating nozzle of thermal melting gun
US20120048889A1 (en) * 2010-08-26 2012-03-01 Huang Yung-Kuan Pusher Unit of Glue Applicator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021261628A1 (en) * 2020-06-26 2021-12-30 오철환 Free-size stick glue gun

Also Published As

Publication number Publication date
EP2730342A1 (en) 2014-05-14
DE102012110680A1 (en) 2014-05-08

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