EP3012033A1 - Pistolet de colle chaude - Google Patents

Pistolet de colle chaude Download PDF

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Publication number
EP3012033A1
EP3012033A1 EP15075031.3A EP15075031A EP3012033A1 EP 3012033 A1 EP3012033 A1 EP 3012033A1 EP 15075031 A EP15075031 A EP 15075031A EP 3012033 A1 EP3012033 A1 EP 3012033A1
Authority
EP
European Patent Office
Prior art keywords
melting chamber
cavity
glue gun
hot
outlet opening
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.)
Granted
Application number
EP15075031.3A
Other languages
German (de)
English (en)
Other versions
EP3012033B1 (fr
Inventor
Reinhard Helms
Hermann Kruse
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.)
Buehnen & Co KG GmbH
Original Assignee
Buehnen & Co KG GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Buehnen & Co KG GmbH filed Critical Buehnen & Co KG GmbH
Publication of EP3012033A1 publication Critical patent/EP3012033A1/fr
Application granted granted Critical
Publication of EP3012033B1 publication Critical patent/EP3012033B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B05C17/00526—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
    • 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

Definitions

  • the present invention relates to a hot glue gun for strand-shaped hot melt glue sticks with a heatable from a heater melt chamber for heating the hot melt adhesive stick having on one side - inlet side - an inlet opening through which the solid hot melt adhesive stick is inserted into an elongated cavity of the melting chamber, and one or more Outlet openings through which a liquefied part of the hot melt adhesive can flow out of the cavity of the melting chamber after heating, and with an outlet opening arranged in particular on a nozzle head of the hot glue gun, through which the hot melt adhesive flowed out of the melting chamber can escape from the hot glue gun.
  • Such hot glue guns have been known for a long time. They are used for bonding a wide variety of objects.
  • a manual trigger By means of a manual trigger, an operator can actuate a feed device which moves the hot melt glue stick into the melting chamber or further conveys it in the melting chamber.
  • the liquefied part of the hotmelt adhesive then flows through the outlet openings of the melting chamber out of this.
  • These outlet openings are in the prior art in relation to the inlet side of the other or opposite end of the melting chamber, namely regularly directly adjacent to the subsequent in the direction of flow of the adhesive nozzle head of the hot glue gun.
  • the liquid adhesive can then more or less directly into the nozzle head flow where it can then flow over the (front) outlet opening of the same from the hot gun.
  • a disadvantage of the hot glue guns known in the prior art is that a relatively high heating power is required to liquefy the hot glue stick when switching the hot glue gun in an acceptable time so that the hot glue gun is operational or to liquefy sufficiently hot melt adhesive during operation can be supplied so that, if necessary, a supply of liquid hot melt adhesive is provided.
  • At least one (regularly several) or the outlet opening of the melting chamber is arranged such that the liquid hot melt adhesive can flow laterally out of the cavity, namely at an angle, preferably substantially perpendicular to the longitudinal extent of the cavity.
  • the Applicant has recognized that the usual prior art arrangement of the melt chamber outlet openings at the front or axial end of the melting chamber or the melting chamber cavity, which causes the hot melt adhesive in the longitudinal direction of the hollow chamber emerges from this, may not yet sufficiently melted Hot glue of the hot melt adhesive stick which can block one or more outlet openings.
  • the "front" end of the melting chamber cavity designates the opposite end / opposite end of the inlet end and the rear end, respectively.
  • the arrangement according to the invention provides one or more outlet openings in the side region of the cavity or in a corresponding circumferential wall of the melting chamber enclosing the cavity , for a significant improvement of the melt adhesive drainage from the melting chamber and thus for an increase in the possible flow rate per unit time.
  • outlet opening (s) which provide for the lateral outflow from the hollow chamber
  • still outlet openings (s) can still be provided, through which the hot melt adhesive in a known manner in the longitudinal direction or in the axial direction can flow out of the hollow chamber.
  • outlet openings through which the hot melt adhesive can flow both laterally and in the longitudinal direction.
  • the lateral outlet openings of the melting chamber may be formed by suitable openings in the peripheral wall of the melting chamber.
  • the outlet openings are separated from each other in the circumferential direction of the peripheral wall by web-like wall sections formed by the circumferential wall.
  • the or each outlet opening through which the hot melt adhesive can escape laterally, elongated and extends to the inlet end of the melting chamber opposite end thereof, in such a way that the hot melt adhesive can also emerge from the cavity parallel to the longitudinal extent of the melting chamber.
  • the one or more outlet openings are arranged in a circumferential wall of the melting chamber surrounding the melting chamber cavity over its entire or over a partial length.
  • the shape of the melting chamber cavity is preferably symmetrical in a manner known per se along a longitudinal center axis or at least along a longitudinal center plane, in particular a hollow cylinder.
  • a plurality of ribs may be arranged, which surround a conically tapered to the inlet opening for the molten metal end of the melting chamber space or limit this.
  • the conically tapering clearance is preferably dimensioned so that a solid, so not yet melted hot melt adhesive stick due to a too large cross section could not penetrate to the end of the same, but possibly only in a (gur sectoren) initial region of the free space in which its cross section this may be allowed.
  • the ribs are preferably distributed in each case with identical angular distances from each other along the corresponding, the cavity bounding inner peripheral surface of the melting chamber.
  • the lateral openings are expediently arranged in each case between two adjacent of the above-mentioned ribs.
  • the melting chamber in the manner described above (also) has outlet openings through which hot melt adhesive in the longitudinal direction of the cavity can escape from this, it is expedient if in the longitudinal direction of the cavity between adjacent ribs in each case a free space is present the liquid hot melt adhesive can flow in this longitudinal direction, up to these outlet openings.
  • the at least one outlet opening laterally outside of a particular circumferential, with a lateral distance extending to this wall of the outlet opening of the hot glue gun having nozzle head limited or covered so that a cavity between the outlet opening and the aforementioned wall of the Nozzle head results.
  • the hot-melt adhesive can then be guided in the direction of the outlet opening of the nozzle head.
  • a corresponding channel is regularly formed between the at least one outlet opening of the melting chamber on the one hand and the outlet opening of the nozzle head on the other hand, through which the liquid hot melt adhesive can flow to the outlet opening during operation of the hot glue gun, in particular after transferring a closure means otherwise closing the channel in a Channel releasing position.
  • the closure means may open or close, for example, depending on the applied hot melt adhesive pressure on a daily basis.
  • At least a portion of the aforementioned channel may be formed by the aforementioned cavity between the at least one outlet opening and the wall of the nozzle head covering it.
  • the cavity of the melting chamber has a separate, elongated insert body which extends in the direction of the front end of the melting chamber or in the direction of the inlet opening of the Melting chamber opposite end conically tapered, by a correspondingly conically tapered inner peripheral surface of the insert body limited (inner) hollow or free space for receiving a front portion of the hot melt adhesive stick.
  • the contour of the inner peripheral surface of the insert body is matched to the corresponding outer diameter of the solid adhesive stick such that the adhesive stick is prevented from a certain depth of penetration into the conical space by the aforementioned inner peripheral surface at a deeper penetration. In other words, the stick then hits the inner peripheral surface and is blocked by this.
  • the glue stick is liquefied by the heat of the heating element.
  • the insert body preferably has, in particular, elongate passages through which the liquid hotmelt adhesive can then flow out of the free space of the insert body outwards into a free space or into a free area between insert body and peripheral wall of the melting chamber. From this free area, the liquid adhesive can then flow to the at least one outlet opening of the melting chamber.
  • the insert body sits snugly in the cavity of the melting chamber, preferably held therein frictionally.
  • ribs extending in the longitudinal direction, which are arranged distributed on a preferably conical outer surface of the insert body and (frictionally engaged) abutting an inner circumferential surface of one or the peripheral wall of the melting chamber delimiting the cavity.
  • Channels may be formed between the ribs along which the liquid adhesive is guided, which previously - coming from the free space of the insert body - has flowed through the passage openings of the insert body into the channels.
  • a hot glue gun 10 has inter alia a known housing 12 with handle 14, trigger lever 16, nozzle head 18, feed device 20, melting chamber 22 and heating element 24th
  • an operator can actuate a feed device 20, which is not described in more detail here, which ensures that a strand-shaped, cylindrical hotmelt stick 26 can be moved in the direction of the front end of the gun 10, namely in the direction of the nozzle head 18 ,
  • the melting chamber 22, in which the section of the adhesive stick 26 located in it is melted, has an elongated cavity 34 which is symmetrical about a longitudinal center plane. This cavity is defined by a peripheral wall 36 of the melting chamber 22, in the present case cylindrical inner peripheral surface 38 A portion of the hot melt stick 26 is located inside the cavity 34.
  • the inside of the cavity 34 located part of the glue stick 26 is liquefied by means of the heating element 24.
  • the heating element 24 heats the melting chamber 22, in particular the peripheral wall 36 bounding the cavity 34.
  • the liquid hot melt adhesive then exits from front outlet openings 28 of the nozzle head 18 of the hot glue gun 10.
  • the nozzle head 18 is ultimately designed as a valve which opens only at a certain pressure of the liquid hot melt adhesive.
  • the nozzle head 18 for this purpose has a corresponding, closable and openable closure means 31.
  • the closure means 31 comprises a serving as a closure member ball 30, which at a suitable adhesive pressure against the restoring forces of a return member of the closure means 31, in this case a spring 32, one of inter alia in Fig. 2b shown closed position can be brought into an open position.
  • outlet openings 40 are formed in the circumferential direction (in the present case, four outlet openings 40). These outlet openings 40 are formed by clearances extending in the longitudinal direction of the cavity 34 in the circumferential wall 36.
  • each formed between two adjacent outlet openings 40 through the peripheral wall webs 42 are arranged.
  • the outlet openings 40 are arranged so that the adhesive can escape laterally, in the present case perpendicular to the longitudinal extent of the cavity 34. Since the outlet openings 40 extend to a front transverse to the longitudinal extent of the cavity 34 extending end wall 44 of the melting chamber 22, the Adhesive also front forward in the longitudinal direction of the cavity 34 flow out of this.
  • the inventive concept (also) to provide lateral outlet openings 40, inter alia, the maximum amount per unit time of adhesive that can escape from the cavity 34, compared to the solutions of the prior art can be significantly increased. This leads to a higher performance of the hot glue gun.
  • ribs 46 extending in the longitudinal direction thereof are arranged. These are relative to the circumferential direction of the inner peripheral surface 38 of the melting chamber 22 distributed in the present case in each case equal angular intervals on the inner peripheral surface 38 and preferably connected thereto. With others In words, the angular intervals between adjacent ribs 46 are substantially identical for all ribs 46.
  • the ribs are wedge-shaped or wedge-shaped in the axial direction or in the longitudinal direction and enclose a free space 48 tapering in the direction of the front end of the cavity 34, that is to say in the direction of the outlet end, or delimit the latter.
  • This tapered clearance 48 ensures that a corresponding adhesive bead 26 adapted to the diameter of the melt chamber cavity 34 can not penetrate so deeply into the cavity 34 that, when remelted, it can cover and block the outlet openings 40.
  • Each rib 46 is respectively associated with a web 42 and connected thereto.
  • the outlet openings 40 are accordingly positioned so that they are each arranged relative to the cavity 34 between two adjacent ribs 46, so that liquid adhesive between the ribs 46 can flow through to the respective outlet opening 40.
  • exit openings 40 may of course be provided. It is important that they are arranged and designed so that a lateral outflow of the adhesive from the cavity 34 is possible.
  • the adhesive flowing out of the outlet openings 40 is then directed via one or more suitable channels to the outlet opening 28 of the nozzle head 18.
  • a circumferential wall 50 of the nozzle head 18 is provided coaxially and at a radial distance from the outlet openings 40. Between wall 50 and outflow openings 40, accordingly, an annular channel 52 is formed into which the laterally emerging adhesive can enter.
  • a (circular) cylindrical channel 54 which extends transversely to the longitudinal extent of the cavity 36. It is formed by a corresponding annular wall portion 56 of the nozzle head 18, an annular portion of the peripheral wall 50 thereof and the outside of the end wall 44 of the melting chamber 22nd
  • the cylindrical channel 54 is finally connected to an axial nozzle channel 58 which extends to the outlet opening 28.
  • This axial nozzle channel 58 is closed by the ball 30 as long as the adhesive pressure is not sufficiently high.
  • Fig. 6 and 7 show a modified embodiment of the invention. Compared to the embodiment of the Fig. 1-5 Functionally identical components are identified by identical reference numerals.
  • an elongate insert (hollow) body 60 is arranged in the modified embodiment.
  • This has a substantially closed peripheral wall 62 which tapers conically towards the inlet end of the melting chamber 22 opposite end or to the outlet end of the melting chamber 22.
  • the peripheral wall 62 includes a correspondingly tapered cavity or space 64. More specifically, this clearance 64 is defined externally by an inner circumferential surface 66 of the peripheral wall 62.
  • the insert body 60 or the free space 64 On the side facing the inlet end of the melting chamber 22, the insert body 60 or the free space 64 has an inlet opening 68 for the hot melt glue stick 26.
  • ribs 70 are arranged on the peripheral wall 62 of the insert body.
  • these ribs 70 are arranged in a wedge shape on a conically extending section of the circumferential wall 62 of the insert body 60.
  • each rib 70 increases in the longitudinal direction, so that each rib 70 despite the conicity of the peripheral wall 62 substantially over their respective entire length on the inner peripheral surface 38 of Cavity 34 of the melting chamber 22 is present.
  • the ribs 70 are present in the circumferential direction of the circumferential wall 62 of the insert body 60 distributed in each case at equal angular intervals on the peripheral wall 62 and arranged and preferably integrally connected thereto. In other words, the angular distances between adjacent ribs 70 are substantially identical for all ribs 70.
  • peripheral wall 62 and inner peripheral surface 38 are formed between the ribs 70 through these limited channels 72 which extend in the longitudinal direction to the outlet end of the melting chamber 22.
  • passage openings 74 and clearances are arranged in the peripheral wall 62 of the insert body, which connect the free space 64 each with a channel 72 medium-conducting.
  • these passage openings 74 are formed as elongated slots which extend substantially in the longitudinal direction.
  • the tapered clearance 64 serves to receive the forward end of the glue stick 26.
  • the tapering of the clearance 64 ensures that the penetration depth of a glue stick, which is adapted to the diameter of the melt chamber cavity 34 and is substantially solid before the melting process, is limited into the free space 64, since the glue stick 26 is narrowed by the smaller inner diameter in the direction of the outlet end of the melting chamber 22 of the free space 64 at a certain penetration depth abuts against the circumferential wall 62 of the insert body 60 and is thereby prevented from penetrating even more deeply into the free space 64.
  • the adhesive embroidering section located within the free space 64 is heated by the heat of the heating element 24 during operation of the hot glue gun 10. After liquefaction, the adhesive penetrates through the passage openings 74 into the channels 72.
  • the channels 72 lead to the outlet openings 40 of the melting chamber 22, through which the liquid adhesive flows and flows in the manner already described above to the nozzle head 18.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)
  • Adhesives Or Adhesive Processes (AREA)
EP15075031.3A 2014-10-16 2015-09-25 Pistolet de colle chaude Active EP3012033B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014015211.1A DE102014015211A1 (de) 2014-10-16 2014-10-16 Heißklebepistole

Publications (2)

Publication Number Publication Date
EP3012033A1 true EP3012033A1 (fr) 2016-04-27
EP3012033B1 EP3012033B1 (fr) 2021-01-13

Family

ID=54288627

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15075031.3A Active EP3012033B1 (fr) 2014-10-16 2015-09-25 Pistolet de colle chaude

Country Status (2)

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EP (1) EP3012033B1 (fr)
DE (1) DE102014015211A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN107362946A (zh) * 2017-05-23 2017-11-21 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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107199155A (zh) * 2017-06-16 2017-09-26 奉化市威优特电器有限公司 一种热熔胶枪

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR957396A (fr) * 1950-02-18
US3298572A (en) * 1965-04-09 1967-01-17 United Shoe Machinery Corp Cement dispensers
US4014464A (en) * 1975-12-09 1977-03-29 Usm Corporation Hot melt dispenser and method of making its melt body
US4050890A (en) * 1976-04-12 1977-09-27 Usm Corporation Hot melt dispenser body
US4637745A (en) * 1984-07-28 1987-01-20 Usm Corporation Melt dispensers

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3585361A (en) * 1969-06-18 1971-06-15 Nordson Corp Supply system for heating and dispensing molten thermoplastic material
US5881923A (en) * 1997-01-17 1999-03-16 Uniplast, Inc Removable cartridge for a hot glue gun

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR957396A (fr) * 1950-02-18
US3298572A (en) * 1965-04-09 1967-01-17 United Shoe Machinery Corp Cement dispensers
US4014464A (en) * 1975-12-09 1977-03-29 Usm Corporation Hot melt dispenser and method of making its melt body
US4050890A (en) * 1976-04-12 1977-09-27 Usm Corporation Hot melt dispenser body
US4637745A (en) * 1984-07-28 1987-01-20 Usm Corporation Melt dispensers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107362946A (zh) * 2017-05-23 2017-11-21 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

Also Published As

Publication number Publication date
EP3012033B1 (fr) 2021-01-13
DE102014015211A1 (de) 2016-04-21

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