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 into 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 traversable within the working space and on the rear En- de the packaging bag acting squeezing used to squeeze already melted working material from the packaging bag and from the receiving space of the melting device.
• 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 toward the at least one outlet opening with an annular constriction with an encircling sealing support 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 region of the constriction is achieved when the constriction is tapered in the direction of the at least one outlet opening.
• the ejection piston can be provided with a head plate which can be extended from it and whose cross section is smaller than the cross section of the ejection piston.
• the invention achieves the result that the packaging bags can be emptied of melted working substance comparatively thoroughly, without requiring too frequent cleaning of the receiving space and / or of the ejection cylinder.
• FIG. 1 shows a bag melter in half-sided axial section with freshly inserted and filled packaging bag.
• Figure 2 shows the same device after complete squeezing melted working material from the receiving bag.
• Fig. 4A / B an alternative embodiment with feather-supported scraper or stripper plate in the pressureless or compressed state.
• the bag melter 10 shown in Figures 1 and 2 in two working positions comprises a receiving space 12 surrounded by a cylindrical inner wall 12A.
• the wall 12B enclosing the receiving space 12 forms opposite 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.
• a tightly filled with a hot melt adhesive 16 packaging bag 18 Within the receiving space 12 is (Fig. 1) a tightly filled with a hot melt adhesive 16 packaging bag 18.
• the packaging bag is tightly closed at its top in the drawing rear end 18A and at its lying in the drawing down front end 18B to form a Dispensing opening 18C fully open. This opening is usually done just before the onset of solid working with taut
• 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 the Auspresskolbens 22 on the cylinder wall and thus a reasonably well-defined pressing pressure on molten 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 4OA wall. This acts self-centering on the packaging bag 18 when it is inserted 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 4OA. As a rule, the lateral pressure which the expanding working substance exerts on the edge zone 18D under the pressure of pressure is usually 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, in such a way 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 top plate 26 in terms of their
• FIG. 3A shows a top view of a scraping or stripping plate 24, which reveals four apertures 24B arranged on a peripheral circle for the compression springs 28.
• a central opening 24C can be seen, from which radiate eight recesses 24D emanate.
• the scraper or scraper plate 24 becomes slightly deformable radially, that is to say it is compressible and / or radially expandable by radial pressure directed towards the center.
• 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.

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)

Priority Applications (6)

Applications Claiming Priority (2)

Publications (1)

Family

ID=40386216

Family Applications (1)

Country Status (9)

Families Citing this family (2)

Citations (10)

Family Cites Families (24)

• 2007
  • 2007-11-28 DE DE202007016705U patent/DE202007016705U1/de not_active Expired - Lifetime
• 2008
  • 2008-11-28 EP EP08854100.8A patent/EP2214839B1/de active Active
  • 2008-11-28 PL PL08854100T patent/PL2214839T3/pl unknown
  • 2008-11-28 JP JP2010535297A patent/JP5539217B2/ja active Active
  • 2008-11-28 WO PCT/EP2008/010134 patent/WO2009068310A1/de not_active Ceased
  • 2008-11-28 CN CN200880125743.4A patent/CN101925413B/zh active Active
  • 2008-11-28 ES ES08854100.8T patent/ES2607898T3/es active Active
  • 2008-11-28 US US12/745,281 patent/US8833610B2/en active Active
  • 2008-11-28 BR BRPI0819709A patent/BRPI0819709B1/pt active IP Right Grant

Patent Citations (10)

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