EP2214839B1 - Générateur de colle à chaud - Google Patents

Générateur de colle à chaud Download PDF

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Publication number
EP2214839B1
EP2214839B1 EP08854100.8A EP08854100A EP2214839B1 EP 2214839 B1 EP2214839 B1 EP 2214839B1 EP 08854100 A EP08854100 A EP 08854100A EP 2214839 B1 EP2214839 B1 EP 2214839B1
Authority
EP
European Patent Office
Prior art keywords
receiving space
packaging bag
scraping
squeezing
hotmelt adhesive
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.)
Active
Application number
EP08854100.8A
Other languages
German (de)
English (en)
Other versions
EP2214839A1 (fr
Inventor
Michael Rothen
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.)
Illinois Tool Works Inc
Original Assignee
Illinois Tool Works Inc
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 Illinois Tool Works Inc filed Critical Illinois Tool Works Inc
Publication of EP2214839A1 publication Critical patent/EP2214839A1/fr
Application granted granted Critical
Publication of EP2214839B1 publication Critical patent/EP2214839B1/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
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1042—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material provided with means for heating or cooling the liquid or other fluent material in the supplying means upstream of the applying apparatus
    • 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
    • B05C17/00576—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 characterised by the construction of a piston as pressure exerting means, or of the co-operating container

Definitions

  • the invention relates to a known as bag melter apparatus for successively melting a packaged in a packaging bag solid material, such as a hot melt adhesive, and for pressing the melted working material from the packaging bag according to the preamble of claim 1.
  • the melting device has a cylindrical, with at least one end Outlet opening provided receiving space for receiving the filled with the working material packaging bag, wherein the packaging bag can be introduced in a suitable manner, for example, from one of the outlet openings opposite the inlet end in the receiving space.
  • At least one heating element is provided in the region of the at least one outlet opening of the receiving space and serves to melt the working substance at the front, a discharge opening for molten material having the end of the packaging bag, which remains closed at its rear end in the rule.
  • a squeezing device with a movable within the working space and on the rear end the squeezing piston acting on the packaging bag serves to squeeze out already melted working substance from the packaging bag and from the receiving space of the melting device.
  • a conveyor system for viscous, pasty or in solid state solid masses in which a dispensing head can be screwed onto a housing providing a receiving space.
  • the dispensing head is provided in its housing-side region with a central opening to an outlet channel 9 and a conical recess which opens into the opening.
  • a hot melt adhesive device which has as an integral part of an adhesive container for filled with hot melt adhesive film bag.
  • a piston element is retractable, but only up to about the middle of the container.
  • a fuselage of aluminum is introduced, on which rests a support ring with a sealing bead.
  • the support ring is therefore spaced from the lower end of the adhesive container, so that a space for Receiving molten adhesive is formed in the lower container half.
  • the molten adhesive can drain from the lower half of the container through a screen plate and be pumped out by means of a functional block having only a single opening.
  • the aim is a continuous operation, since solid adhesive passes by pressurizing the piston in the lower half of the container and is only melted there.
  • the invention is based on the problem of bag smoother even when using bulging packaging bags with undersize to protect against contamination with molten working fluid.
  • a melting device bag melter
  • the invention therefore provides, in the case of generic melting devices, to provide the receiving space at its mouth end facing the at least one outlet opening with an annular constriction with an encircling sealing bearing surface for the packaging bag at least at its edge zone surrounding the dispensing opening of the packaging bag.
  • a self-centering of the packaging bag in the area of the constriction is achieved when the constriction in Direction to the at least one outlet opening is preferably formed tapered.
  • the ring-like constriction as insertion or Anmaneil be provided detachably at the mouth end of the receiving space.
  • the extrusion piston is provided with a head plate which can be extended therefrom and whose cross section is smaller than the cross section of the ejection piston.
  • the desired Scharkanttechnik the extrusion piston at its leading circumferential edge can be maintained. This is desirable for scraping and thus cleaning along the inner cylinder wall of the receiving space.
  • the packaging bags can be emptied comparatively thoroughly from molten working substance without requiring too frequent cleaning of the receiving space and / or of the extrusion cylinder.
  • the in Figures 1 and 2 Bag melter 10 shown in two working positions comprises a receiving space 12 surrounded by a cylindrical inner wall 12A. Surrounding receiving space 12, wall 12B forms opposite mouth ends 12C and 12D at their upper and lower working positions, respectively. The lower mouth end 12D is closed with an end plate 14 having a plurality of outlet openings 14A.
  • Within the receiving space 12 is ( Fig. 1 A packaging bag 18 tightly filled with a hot melt adhesive 16.
  • the packaging bag is tightly closed at its rearward end 18A in the drawing and fully opened at its front end 18B lying down in the drawing to form a discharge opening 18C. This opening is usually done just before the onset of solid working with taut filled packaging bag 18 into the receiving space 12 from top to bottom, ie from the upper mouth end 12C ago.
  • the squeezing device 20 for the packaging bag 18 can be removed in a suitable manner.
  • the ejection device 20 comprises an extrusion piston 22, which is axially advanceable within the receiving space 12.
  • the extrusion piston 22 has a scraping or stripping plate 24 (e.g., PTFE, e.g., Teflon®) and has a sharp-edged circumferential scraping edge 24A.
  • PTFE e.g., Teflon®
  • a low-loss sliding of the extrusion piston 22 on the cylinder wall and thus a reasonably well-defined pressure on melted working substance 16A in the region of the lower heating zone can be realized.
  • the receiving space 12 has in the region of its lower mouth end 12D via a ring-like constriction 40. This is executed in the illustrated and so far preferred embodiment as at the lower mouth end of the receiving space 12 on the wall 12B releasably attachable ring. This has on its the receiving space 12 side facing a conical, serving as a sealing surface 40A wall. This acts self-centering on the packaging bag 18 when it is pushed into the receiving space 12. As soon as the heating element 30 leads to a melting in the region 16A of the working substance 16, the edge zone 18D of the packaging bag 18 automatically applies itself to the conical sealing surface 40A. As a rule, the lateral pressure which the expanding working substance exerts on the edge zone 18D under the pressure of pressure is generally sufficient for this purpose.
  • the extrusion piston 22 is further equipped with a head plate 26 which are connected via pressure springs 28 which are passed through the cocking plate 24, with the extrusion piston 22.
  • This cross-sectional area of the top plate is smaller than that of the scraping plate 24, such that an edge gap 26A remains between the outer edge of the top plate and the cylinder wall 12A of the receiving space 12.
  • This edge gap 26A is dimensioned so that the head plate 26 in the cross-sectional constricted at the bottom of the receiving space 12th can penetrate to a predeterminable distance.
  • the compression springs 24 are compressed under the pressure of the extrusion piston.
  • the pressure of the springs 28 is sufficient to advance the head plate into the constriction area and thereby squeeze out the last remains of working substance from the packaging bag, although the cocking plate 24 does not lower further, but stops before the beginning of the constriction 40.
  • FIG. 3A is a cocking or Abstreifplatte 24 seen in plan view, which has four arranged on a circumferential circle openings 24B for the compression springs 28 can be seen.
  • a central opening 24C can be seen, from which radiate eight recesses 24D emanate.
  • the scraping or stripping plate 24 becomes slightly deformable radially, ie, it is compressible by radial pressure directed towards the center and / or expandable radially outwards.
  • the scraping edge 24A subsequently abuts tightly against the cylindrical inner wall 12A of the receiving space 12. If the cross-section of the receiving space 12 in the region of the heating element 30 increases due to heating, the cross-section of the scraping or stripping plate 24 can follow this cross-sectional enlargement.
  • scraping or stripping plate 24 after any initial radial compression upon release of the radial inwardly directed forces can expand more easily and / or that the scraper or stripper plate 24 after an initial radial expansion due to the used expandable restoring element 25 due to externally applied radial compression forces reversibly on the original cross-sectional dimension can deform back.

Landscapes

  • Package Closures (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Processing Of Solid Wastes (AREA)

Claims (8)

  1. Fondoir à colle pour adhésif thermofusible, prévu pour faire fondre successivement un adhésif thermofusible (16) emballé dans un sachet d'emballage (18) et pour exprimer l'adhésif thermofusible fondu hors du sachet d'emballage, comprenant
    - un espace de réception cylindrique (12) pourvu d'au moins une ouverture de sortie du côté de l'extrémité, pour recevoir le sachet d'emballage (18) rempli de l'adhésif thermofusible et présentant une extrémité avant (18B) et une extrémité arrière (18A),
    - au moins un élément chauffant (30) dans la région de l'au moins une ouverture de sortie (14A) pour faire fondre l'adhésif thermofusible au niveau de l'extrémité avant du sachet d'emballage (18) du côté frontal, présentant une ouverture de distribution (18C) pour la substance de travail fondue et
    - un dispositif d'expression (20) avec un piston d'expression (22) déplaçable à l'intérieur de l'espace de réception (12) et agissant sur l'extrémité arrière (18A) du sachet d'emballage (18),
    caractérisé en ce que
    l'espace de réception (12) présente, au niveau de son extrémité d'embouchure (12D) tournée vers l'au moins une ouverture de sortie (14A), un rétrécissement de type annulaire (40) avec une surface d'appui (40A), réalisant une étanchéité sur la périphérie, pour le sachet d'emballage (18) au moins au niveau de sa zone de bord (18D) entourant l'ouverture de distribution (18C), le piston d'expression (22) étant pourvu d'une plaque de tête (26) de section transversale rétrécie par rapport à la section transversale de l'espace de réception (12), qui est déplaçable axialement par rapport au piston d'expression.
  2. Dispositif selon la revendication 1, caractérisé en ce que la surface d'étanchéité (40A) du rétrécissement (40) se rétrécit progressivement, notamment sous forme conique, vers l'extrémité inférieure d'embouchure (12D) de l'espace de réception (12).
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que le rétrécissement annulaire (40) fait partie d'un élément annulaire pouvant être inséré fixement ou de manière amovible dans la région d'extrémité inférieure de l'espace de réception (12).
  4. Dispositif selon la revendication 1, caractérisé en ce qu'un agencement de ressort, tel que des ressorts de compression (28), fait avancer axialement la plaque de tête (26) quand la plaque de tête (26) se rapproche ou atteint la zone fondue (16A) de l'adhésif thermofusible pouvant être fondu.
  5. Dispositif selon l'une quelconque des revendications 1 à 3 ou 4, dans lequel le piston d'expression (22) est pourvu d'une plaque de racloir ou de raclage (24) venant en contact avec la paroi cylindrique interne (12A) de l'espace de réception (12), caractérisé en ce que la plaque de racloir ou de raclage (24) est pourvue d'au moins un évidement (24C, 24D) inséré dans son côté supérieur axial et/ou dans son côté inférieur axial et/ou entre son côté supérieur axial et son côté inférieur axial, permettant une compression au moins radiale de la plaque de racloir ou de raclage (24).
  6. Dispositif selon la revendication 5, caractérisé en ce que dans l'évidement (24C, 24D) de la plaque de racloir ou de raclage (24) est inséré au moins un élément de rappel expansible (25).
  7. Dispositif selon la revendication 5 ou 6, caractérisé en ce que l'évidement (24C, 24D) est configuré en forme d'étoile avec des bandes s'étendant radialement.
  8. Dispositif selon la revendication 6 ou 7, caractérisé en ce que l'élément de rappel expansible présente l'élasticité du caoutchouc et peut se déformer plus facilement de manière élastique que la plaque de racloir ou de raclage (24).
EP08854100.8A 2007-11-28 2008-11-28 Générateur de colle à chaud Active EP2214839B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202007016705U DE202007016705U1 (de) 2007-11-28 2007-11-28 Beutelschmelzer
PCT/EP2008/010134 WO2009068310A1 (fr) 2007-11-28 2008-11-28 Générateur de colle à chaud

Publications (2)

Publication Number Publication Date
EP2214839A1 EP2214839A1 (fr) 2010-08-11
EP2214839B1 true EP2214839B1 (fr) 2016-09-28

Family

ID=40386216

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08854100.8A Active EP2214839B1 (fr) 2007-11-28 2008-11-28 Générateur de colle à chaud

Country Status (9)

Country Link
US (1) US8833610B2 (fr)
EP (1) EP2214839B1 (fr)
JP (1) JP5539217B2 (fr)
CN (1) CN101925413B (fr)
BR (1) BRPI0819709B1 (fr)
DE (1) DE202007016705U1 (fr)
ES (1) ES2607898T3 (fr)
PL (1) PL2214839T3 (fr)
WO (1) WO2009068310A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2015339070A1 (en) * 2014-10-31 2017-05-25 Toaster Labs, Inc. Inductively heatable fluid reservoir
DE102017221708A1 (de) * 2017-12-01 2019-06-06 Klebchemie, M.G. Becker Gmbh & Co Kg Vorrichtung und Verfahren zum Aufschmelzen eines Schmelzklebstoffes

Citations (2)

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EP0434617A1 (fr) * 1989-12-19 1991-06-26 Balti Ag Dispositif d'alimentation pour des matériaux fluides, pâteux ou solides à froid, en particulier pour des adhésifs thermofusibles
DE102004011628A1 (de) * 2004-03-10 2005-09-29 Hs Klebtec Klebetechnik Und Sondermaschinen Gmbh Schmelzklebstoffgerät

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Publication number Priority date Publication date Assignee Title
EP0434617A1 (fr) * 1989-12-19 1991-06-26 Balti Ag Dispositif d'alimentation pour des matériaux fluides, pâteux ou solides à froid, en particulier pour des adhésifs thermofusibles
DE102004011628A1 (de) * 2004-03-10 2005-09-29 Hs Klebtec Klebetechnik Und Sondermaschinen Gmbh Schmelzklebstoffgerät

Also Published As

Publication number Publication date
ES2607898T3 (es) 2017-04-04
WO2009068310A1 (fr) 2009-06-04
DE202007016705U1 (de) 2009-04-09
JP2011504858A (ja) 2011-02-17
PL2214839T3 (pl) 2017-03-31
US8833610B2 (en) 2014-09-16
CN101925413B (zh) 2014-09-17
CN101925413A (zh) 2010-12-22
EP2214839A1 (fr) 2010-08-11
JP5539217B2 (ja) 2014-07-02
BRPI0819709A2 (pt) 2015-06-16
US20100308079A1 (en) 2010-12-09
BRPI0819709B1 (pt) 2020-05-19

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