EP0860212B1 - Auftragsgerät für Heissschmelzkleber und Kleberstift für dieses Gerät - Google Patents

Auftragsgerät für Heissschmelzkleber und Kleberstift für dieses Gerät Download PDF

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Publication number
EP0860212B1
EP0860212B1 EP98400400A EP98400400A EP0860212B1 EP 0860212 B1 EP0860212 B1 EP 0860212B1 EP 98400400 A EP98400400 A EP 98400400A EP 98400400 A EP98400400 A EP 98400400A EP 0860212 B1 EP0860212 B1 EP 0860212B1
Authority
EP
European Patent Office
Prior art keywords
applicator
chamber
substrate
stick
track
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98400400A
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English (en)
French (fr)
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EP0860212A1 (de
Inventor
Francis Richardot
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.)
Rocafix
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Rocafix
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Filing date
Publication date
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Publication of EP0860212A1 publication Critical patent/EP0860212A1/de
Application granted granted Critical
Publication of EP0860212B1 publication Critical patent/EP0860212B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • B05C17/00546—Details of the heating means
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1798—Surface bonding means and/or assemblymeans with work feeding or handling means with liquid adhesive or adhesive activator applying means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/18—Surface bonding means and/or assembly means with handle or handgrip

Definitions

  • the present invention relates to an applicator hot melt glue and a designed glue stick to power such an applicator.
  • FIG. 1 of the accompanying drawing a hot melt glue applicator of a type currently widely spread. It takes the form of a pistol whose the handle 1 extends beyond a body 2.
  • the body 2 comprises an elongated chamber 3 having a first end 4 shaped as an inlet for a stick 5 of glue hot-melt, and a second end 6 equipped with a nozzle 7 for dispensing molten glue.
  • the applicator still includes mechanical means (not shown) actuated by pressing a trigger 8 to gradually push the glue stick 5 into the bedroom 3, and mounted electric heating means around chamber 3 to melt the material hot melt stick 5 contained in this chamber.
  • These means are arranged in a volume 9 around the bedroom 3 and are powered by an energy source electric outdoor (the sector for example), by through an electric cable 10 crossing the handle.
  • the drops of molten glue coming out of the nozzle 7 can be used to assemble many parts between them, or to supports, for example to fix rods or cladding pieces on walls, ceilings, etc. etc.
  • the heating means currently incorporated into such applicators are essentially of two types. According to the first, these means consist of a cylindrical cartridge filled with a constituent material an electrical resistance and having a coefficient of positive temperature. The cartridge is fed electrically and mounted in a metal sleeve crossed by chamber 3, so as to heat this sheath by thermal conduction. Due to the coefficient of positive temperature of the material contained in the cartridge, the resistance of this material increases with its temperature, which ensures current regulation electric heating.
  • these means take the form of an electrical resistance wire-like insulated, wound around chamber 3 on a metallic sheath crossed by this chamber.
  • the present invention therefore aims to achieve a glue applicator which does not have the drawbacks mentioned above of the prior art applicators and which, in particular, rises very quickly in temperature, presents a high thermal efficiency and high melt glue flow.
  • the present invention also aims to achieve a such an applicator which is reliable, which has good cost-effective electrical safety for the user low manufacturing cost.
  • a hot-melt adhesive applicator comprising a) a chamber elongated having a first end shaped as an inlet for a stick of said hot-melt adhesive and a second end equipped with a molten glue distribution nozzle, b) means for gradually pushing said rod into said chamber and c) electrical heating means of the part of the stick contained in the chamber.
  • said heating means comprise at least one element heater consisting of a track made of an electrically material resistant and provided with means of connection to a source of electrical energy, said track being formed on a surface electrically insulating of a substrate arranged so as to be in close thermal contact with a mass of glue contained in said room.
  • the substrate of a heating element is planar.
  • the heating element is then placed in a wall side of the room. Alternatively, it can be arranged in a central position in this room.
  • the applicator includes a plurality of such elements, these elements lining the wall of the room, the faces of their substrates which carry the resistive tracks being facing the axis of said chamber.
  • said chamber has a taper of vertex placed from side of the glue dispensing nozzle.
  • Substrates heating elements then each have the shape of an elongated triangle, adapted to said taper of the bedroom.
  • the body comprises a socket 11 preferably made of a material electrically and thermally insulating. She presents advantageously, but not exclusively, a form taper of axis X, a ring 12 being mounted on the inlet 4 'from the sleeve to guide a 5' glue stick pushed, according to arrow F, in an elongated chamber 3 ' internal to the socket 11 and centered on the X axis. other end 6 ', the socket is fitted with a nozzle 7' stick adhesive distribution, after melting this in the heating body. It is clear that the elements or organs 3 ', 4', 6 'and 7' are identical or equivalent to elements 3,4,6 and 7 respectively of the prior art applicator shown in the figure 1.
  • the wall of the chamber 3 ' is lined with at least one, and preferably several, heating elements 13 1 , 13 2 , ... 13 6 distributed symmetrically around the axis X so as to cover substantially the entire surface of this wall.
  • Each heating element is retained in its notch by wedging and / or gluing.
  • each heating element 13 i comprises a flat substrate 14 i in the shape of a very elongated triangle, adapted to the conicity of the chamber 3 '. It is understood that the frustoconical shape given to this chamber, with the apex placed on the side of the nozzle 7 ', allows the mass of molten glue that the chamber 3' contains in operation, to gradually taper towards the nozzle 7 'for s 'adapt to the small diameter of a channel passing through this nozzle.
  • the substrate 14 i in the form of an elongated triangle which constitutes the base of a heating element 13 i has an insulating surface which carries a track 15 i made of an electrically resistant material, track itself covered with a layer of electrical insulation (not shown).
  • the electrical resistance of this material is chosen so that the passage of an adequate electric current through all of the tracks 15 i of the heating body quickly ensures the softening and then the melting of the adhesive of a stick 5 'introduced into the chamber. 3 '.
  • the tracks 15 i are turned towards the axis X of the chamber 3 '(see FIG. 3). They are thus advantageously in close contact with the mass of adhesive which is in the chamber 3 ′, through the thin layer of electrical insulation which separates each track from this adhesive.
  • a heating element such as that shown in the Figure 4 can be achieved using the means used for manufacturing hybrid layer circuits thick.
  • a circuit is made up conventionally of a substrate, of alumina, of enamelled sheet or in stainless steel sheet covered with a dielectric by example, receiving by screen printing a network of tracks conductive and resistance and supplemented by active and / or passive components reported on the substrate.
  • the heating element of FIG. 4 can be produced by depositing on a first substrate a conductive track 16 i , and by covering the track with an insulating paste on which the resistive track 15 i is screen printed. It is finally covered with a layer of electrical insulation, as we saw above.
  • Tracks 15 i and 16 i are connected through a via disposed at the end 17 i of the element.
  • Contacts 18 i , 19 i are welded to the ends of the tracks 15 i , 16 i respectively, for the connection of these tracks to a source of electrical energy.
  • Such a bilayer circuit could also be implemented by the technique of "co-cooked" multilayer circuits, so as to avoid multiple cooking stages necessary for the manufacturing procedure described above.
  • the resistive track 15 i of the heating element of FIG. 4 takes the form of a coil to increase its surface, and therefore the value of its electrical resistance.
  • the resistive track 15 ′ i is straight, just like the conductive return track 16 ′ i , adjacent and formed in the same layer as the track 15 ′ i .
  • the circuit of the heating element 13 " i shown is also monolayer, the resistive track 15" i running on two opposite longitudinal edges of one face of the substrate 14 i .
  • these tracks are performed by screen printing following a well-defined procedure known in the manufacture of hybrid layer circuits thick with electrical resistances.
  • the track is then constituted by a resistive "ink” deposited at the pasty state on the substrate through a mask and then dried to remove the solvents incorporated into the paste filed.
  • These steps are followed by high cooking temperature (about 850 ° C) to give a good stability to the heating element.
  • high cooking temperature about 850 ° C
  • Many compositions well known to those skilled in the art are usable in the present invention.
  • an ink with a positive temperature coefficient will be chosen to regulate the supply current of the heating elements.
  • Those skilled in the art have at their disposal a wide range of inks having temperature coefficients up to 3,500.10 -6 / degrees C.
  • the nature and the positions of the heating elements of the heating body of the adhesive applicator according to the invention are favorable for obtaining a rapid rise in temperature of the adhesive and a high thermal efficiency of the applicator, for the following reasons.
  • the position of each heating element in close contact with the surface of the adhesive volume, ensures direct heat transfer between the heating element and the adhesive. This is not the case in the glue applicators mentioned in the preamble to this description where the heating elements serve to heat a metal sheath which, in turn, transfers calories to the glue.
  • the efficiency of this double thermal transfer is lower than that of the direct thermal transfer operated in an applicator according to the invention.
  • the efficiency of the latter is further increased by the fact that the heat radiated by the heating elements is focused in the mass of adhesive.
  • An appropriate choice of materials constituting the substrates 14 i of the tracks and the sleeve 11 makes it possible to minimize the losses by thermal conduction in these materials.
  • the cross section of the adhesive stick 5 ′ is advantageously conformed according to the invention (see figure 2) so as to facilitate its introduction into the chamber and to bring the outer surface of the stick closer to that of the heating elements.
  • the invention is not limited to embodiments described and shown which have not been given as an example.
  • This is how the wall of chamber 3 'could take a cylindrical shape rather than conical and that its cross section could have a polygonal shape other than hexagonal, or even a circular shape.
  • One or more resistive tracks helical in shape can then be formed on the wall of the chamber 3 ', to constitute the elements heating.
  • this comprises a socket 20 pierced with a cylindrical chamber 21 suitable for accommodating a stick of glue of the same shape, in the solid state.
  • Room 21 accommodates a heating element 22 extending along the longitudinal axis of the chamber 21 in a plane substantially diametral thereof (see Figure 9).
  • the heating element 22 consists of a planar substrate 23 of structure similar to the substrates 14 i of the heating elements 13 i described above. This substrate is covered, on at least one face, by a track 24 made of an electrically resistant material, covered with a layer of electrical insulation (not shown). Terminals 25, 26 ensure the connection of this track to an external electrical energy source.
  • the glue stick is introduced into the body of heats by the end 21a of the chamber 21.
  • the end of the substrate 23 of the heating element 22 therein is cut at point 27 to facilitate entry of the rod in chamber 21, this rod then impaling itself on the heating element. This action is facilitated by the fact that the calories released by the heating element soften the glue stick as its penetration into chamber 21.
  • the central position of the heating element 22 in chamber 21 ensures complete absorption of calories by the mass of the glue stick, which is favorable from the point of view of the thermal efficiency of the body of heated.
  • a substrate 23 having good thermal conductivity such as suitably electrically insulated metal substrate, so that the heat given off by track 24 diffuses on both sides of the substrate.
  • the heating element 22 can be arranged as shown in Figure 10 so that constitute part of the wall of a chamber 29 formed in a heater 28, the single track 24 being facing the interior of this room, which accommodates the glue stick.
  • FIG. 11 shows a heating body constituted by a cylindrical envelope 30 partially cut away in the figure, made of a thermal insulation material, for example, a cylindrical heating element 32 being slid against the wall of an elongated chamber 31 passing through the envelope 30.
  • the element 32 comprises a cylindrical substrate 33 on the inner wall of which one or more tracks 34 1 , .... are formed of an electrically resistant material.
  • FIG. 12 represents a variant of the embodiment of FIG. 11 which differs from it only in that the conductive track or tracks 34 i are formed on the external wall of the substrate 33, so as to facilitate the realization of these tracks.
  • the substrate 33 used be thin (a few tenths of a mm for example) and made of a material which is good conductor of heat so as to allow the radiation of the heat emitted towards the interior of the chamber 31.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Resistance Heating (AREA)
  • Surface Heating Bodies (AREA)

Claims (17)

  1. Auftragsgerät für Heissschmelzkleber, umfassend a) eine langgestreckte Kammer (3';21;29;31) mit einem ersten Ende (4'), das als Eintritt für einen Stab (5') des Heissschmelzklebers ausgebildet ist, und einem zweiten Ende (6'), das mit einer Düse (7') zur Abgabe von geschmolzenem Kleber versehen ist, b) Mittel, um den Stab fortschreitend in die Kammer zu drücken, und c) Mittel zum elektrischen Erhitzen des in der Kammer enthaltenen Teils des Stabs, dadurch gekennzeichnet, dass die Heizmittel mindestens ein Heizelement (13i;13'i;13"i;22;32) aufweisen, das aus einem Streifen (15i;15'i;15"i;24;24';34i) aus einem Werkstoff mit einem elektrischen Widerstand besteht, der mit Mitteln zum Anschluss an eine elektrische Energiequelle versehen ist, wobei der Streifen auf einer elektrisch isolierenden Fläche eines Substrats (14i;23;33) ausgebildet ist, das so ausgebildet bzw. angeordnet ist, dass es in engem thermischen Kontakt mit einer in dieser Kammer (3';21;29;31) enthaltenen Klebermasse ist.
  2. Auftragsgerät nach Anspruch 1, dadurch gekennzeichnet, dass das Substrat (14i;22) eben ist.
  3. Auftragsgerät nach Anspruch 2, dadurch gekennzeichnet, dass das Heizelement (22) mit ebenem Substrat (23) in einer zentralen Stellung in der Kammer (21) auf deren Achse angeordnet ist (Fig. 9).
  4. Auftragsgerät nach Anspruch 3, dadurch gekennzeichnet, dass das Substrat (23) des Heizelements (22) auf der Seite des Eintritts (21a) eines Kleberstabs in die Kammer (21) als Spitze (27) zugeschnitten ist.
  5. Auftragsgerät nach einem der Ansprüche 3 und 4, dadurch gekennzeichnet, dass jede der beiden Seiten des Substrats (23) einen Streifen (24;24') aus einem Werkstoff mit einem elektrischen Widerstand trägt.
  6. Auftragsgerät nach Anspruch 2, dadurch gekennzeichnet, dass das Heizelement (22) mit ebenem Substrat in einer Seitenwand der Kammer (29) angeordnet ist (Fig. 10).
  7. Auftragsgerät nach Anspruch 1, dadurch gekennzeichnet, dass das Heizelement (32) ein nicht ebenes Substrat (33) aufweist.
  8. Auftragsgerät nach Anspruch 7, dadurch gekennzeichnet, dass das Substrat (32) zylindrisch ist und an der Wand der Kammer (31) anliegt.
  9. Auftragsgerät nach Anspruch 2, dadurch gekennzeichnet, dass es mehrere Heizelemente (13i;13'i;13"i) aufweist, mit denen die Wand der Kammer (3') ausgelegt ist, wobei die Seiten ihrer Substrate, die die Widerstandsstreifen (15i;15'i;15"i) tragen, der Achse (X) der Kammer zugewandt sind.
  10. Auftragsgerät nach Anspruch 9, dadurch gekennzeichnet, dass die Kammer (3') eine Konizität auf der Seite der Düse (7') zur Abgabe von Kleber besitzt.
  11. Auftragsgerät nach Anspruch 10, dadurch gekennzeichnet, dass die Substrate der Heizelemente jeweils die Form eines langgestreckten Dreiecks aufweisen, das an diese Konizität der Kammer (3') angepasst ist.
  12. Auftragsgerät nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass der von jedem Heizelement getragene Widerstandsstreifen (15i; 15'i; 15"i;24;24';34i) durch Siebdruckauftrag einer resistiven Paste auf dem Substrat (141;23;33) mit Hilfe der Technologie der Herstellung von Dickschicht-Hybridschaltungen hergestellt ist.
  13. Auftragsgerät nach Anspruch 12, dadurch gekennzeichnet, dass der den Streifen (15i;15'i;15"i;24;24';34i) bildende Werkstoff einen positiven Temperaturkoeffizienten besitzt.
  14. Auftragsgerät nach einem der Ansprüche 12 und 13, dadurch gekennzeichnet, dass die Paste Metalle, Rutheniumund/oder Indiumoxide enthält.
  15. Auftragsgerät nach einem der Ansprüche 12 bis 14, dadurch gekennzeichnet, dass das Substrat ausgewählt ist aus: einem Substrat aus Aluminiumoxid, einem Substrat aus emailliertem Blech, einem Substrat aus rostfreiem Blech, das mit einer dielektrischen Schicht beschichtet ist.
  16. Auftragsgerät nach einem der Ansprüche 12 bis 15, dadurch gekennzeichnet, dass der Streifen einen Widerstand zwischen 1 Ω/□ und 1000 Ω/□ bei einer Dicke von etwa 8 bis 20 µm aufweist.
  17. Klebestab (5') in festem Zustand zur Versorgung der Kammer (3') des Auftragsgeräts nach einem der Ansprüche 9 bis 16, dadurch gekennzeichnet, dass der Stab eine zylindrische Form mit regelmäßigem polygonalem Querschnitt entsprechend dem des Eintritts der Kammer (3') aufweist.
EP98400400A 1997-02-21 1998-02-19 Auftragsgerät für Heissschmelzkleber und Kleberstift für dieses Gerät Expired - Lifetime EP0860212B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9702104 1997-02-21
FR9702104A FR2759925B1 (fr) 1997-02-21 1997-02-21 Applicateur de colle thermofusible et batonnet de colle concu pour alimenter un tel applicateur

Publications (2)

Publication Number Publication Date
EP0860212A1 EP0860212A1 (de) 1998-08-26
EP0860212B1 true EP0860212B1 (de) 2002-05-22

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Application Number Title Priority Date Filing Date
EP98400400A Expired - Lifetime EP0860212B1 (de) 1997-02-21 1998-02-19 Auftragsgerät für Heissschmelzkleber und Kleberstift für dieses Gerät

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Country Link
US (1) US6142207A (de)
EP (1) EP0860212B1 (de)
DE (1) DE69805456T2 (de)
FR (1) FR2759925B1 (de)

Families Citing this family (14)

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Publication number Priority date Publication date Assignee Title
US6891130B2 (en) * 2000-09-15 2005-05-10 Walter Evanyk Appliance for dispensing melt adhesive with variable duty cycle and method of implementing
US6805317B1 (en) 2000-11-28 2004-10-19 Valmet-Karlstad Ab Adhesive dispenser in a reel-up in a paper machine
US6705560B1 (en) 2000-11-28 2004-03-16 Metso Paper Karlstad Aktiebolg (Ab) Method for winding a tissue web in a reel-up in a paper machine
FR2820346B1 (fr) * 2001-02-02 2003-04-18 Rocafix Applicateur de colle thermofusible
US20040232165A1 (en) * 2003-05-22 2004-11-25 Kuo-Jium Lee Glue gun
US20060191957A1 (en) * 2004-10-13 2006-08-31 Hyperion Innovations Inc. Glue dispensing apparatus
US20060081650A1 (en) * 2004-10-13 2006-04-20 Hyperion Innovations, Inc. Glue dispensing apparatus
ES2357265B1 (es) * 2008-05-14 2012-01-25 Jesús Francisco Barberán Latorre Fusor para alimentadores de colas termofusibles.
WO2011109791A1 (en) * 2010-03-04 2011-09-09 Cao Group, Inc. Hot melt dental materials and devices and methods for using the same
US9596720B2 (en) 2013-03-15 2017-03-14 ProtoParadigm LLC Inductively heated extruder heater
CN206882068U (zh) * 2017-05-23 2018-01-16 杭州科龙电器工具股份有限公司 一种热熔胶枪速热枪头以及热熔胶枪
CN107159530A (zh) * 2017-06-16 2017-09-15 奉化市威优特电器有限公司 一种热熔胶枪的加热装置
US10548688B2 (en) 2017-07-10 2020-02-04 Addent, Inc. Device and method for heating dental composite materials
US10172690B1 (en) * 2017-07-10 2019-01-08 Addent, Inc. Device and method for heating dental composite materials

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US4145601A (en) * 1976-10-18 1979-03-20 Lavrentiev Konstantin A Electric heating installation for heating high purity liquid and gaseous media
FR2565131B1 (fr) * 1984-06-05 1987-09-04 Sofragraf Applicateur d'un produit fondu, tel qu'une colle thermofusible ou de la soudure
DE3906480A1 (de) * 1989-03-01 1990-09-13 Henkel Kgaa Heizkoerper fuer elektrowaermegeraete, insbesondere fuer eine heisskleber-pistole, mit wenigstens einem temperaturabhaengigen widerstand
EP0423388A1 (de) * 1989-10-18 1991-04-24 STEINEL Entwicklungs-GmbH für Elektrotechnik und Elektronik Elektrisch beheizte Klebepistole
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IT1291696B1 (it) * 1996-07-18 1999-01-21 Ennio Carlet Elemento riscaldante elettrico autoregolante per riscaldatori a cartuccia o a provetta

Also Published As

Publication number Publication date
FR2759925A1 (fr) 1998-08-28
FR2759925B1 (fr) 1999-05-14
US6142207A (en) 2000-11-07
DE69805456D1 (de) 2002-06-27
DE69805456T2 (de) 2002-10-31
EP0860212A1 (de) 1998-08-26

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