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
  • B05C11/1039—Recovery of excess liquid or other fluent material; Controlling means therefor
• • 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
  • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
  • B05C1/006—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to the edges of essentially flat articles
• • 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
  • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
  • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
  • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
  • B05C1/10—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the liquid or other fluent material being supplied from inside the roller
• • 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

Definitions

• the present finding concerns a glue spreading apparatus on tapes to allow their subsequent application on the edges of panels.
• the apparatus in question can be mounted preferably on the bench of a dedicated machine with manual forward movement of the panels or else it can be arranged inside a line for the flanging of panels equipped with many work groups arranged in series with one another and also comprising, for example, in addition to the present apparatus, butting, milling, grinding, trimming and other groups.
• panels tend to be coated through the application of tapes, which are then finished by rounding their edges according to the desired profiles.
• the tape is applied to the peripheral edge of each panel through the interposition of a layer of glue that the apparatus picks up from a containment tank and then spreads through a roller onto the tape whilst the latter passes through the apparatus to then compress the same tape on the edge of the panel.
• the glue is of the thermofusible type (EVA) having a reversible reaction with heat, or else of the polyurethane type, having an irreversible reaction with heat and therefore particularly suitable for panels intended to be arranged close to heat sources or that require a particular seal against water.
• EVA thermofusible type
• polyurethane type having an irreversible reaction with heat
• the spreading apparatus requires planned operation stops that, for example, normally last for the break for the weekend.
• the tank must also preferably be practical and easy to disassemble in order to allow all of the areas where the glue can get stuck to be quickly reached.
• a first drawback consists of the fact that when the work cycle recommences it is necessary to completely expel the mixture of glue and wax waiting for the roller to expel all of the glue provided with wax residue that would not allow the tape to stick well onto the edge of the panel.
• a further drawback consists of the fact that polyurethane glue is rather expensive and therefore, although there is generally only a minimal layer of glue in the tank when production is suspended, it is clear that especially in the case of frequent suspensions, a large amount of glue mixed with wax is thrown away. In apparatuses that work with groups in line through which the panels automatically travel there are more sophisticated but very expensive systems to preserve the polyurethane glue preventing it from setting at the end of work.
• a known solution of spreading apparatus foresees the storage of polyurethane glue inside a tank in inert atmosphere, in particular in nitrogen.
• This apparatus does, however, have the drawback of also being particularly expensive.
• the problem forming the basis of the present invention is to avoid the drawbacks of already known solutions by providing a glue spreading apparatus that can be easily cleaned without dismounting the apparatus.
• Another purpose of the present finding is to provide an apparatus that is constructively simple and operatively totally reliable.
• the technical characteristics of the finding, according to the aforementioned purposes, can be clearly seen from the content of the claims shown below and its advantages shall become clearer in the following detailed description, made with reference to the attached drawings, which represent an embodiment purely as an example and not for limiting purposes, in which:
• FIG. 1 and 2 show two overall perspective views of a machine for gluing edges to panels, with a glue spreading apparatus according to the invention mounted;
• FIG. 3 schematically shows an overall perspective view of the glue spreading apparatus according to the invention
• FIG. 4 schematically shows a side view of the apparatus of figure 3;
• FIG. 5 shows a section view of the apparatus of figure 4 carried out along the line A-A of the same figure 4.
• the apparatus 1 in question can be arranged on in-line machines for the edging of panels as gluing group arranged in series with other work groups or else preferably it can be associated with a dedicated machine (indicated with A in figures 1 and 2) for gluing edges to panels with manual advancing of the panels.
• the machine A is provided with a support framework rested on the floor equipped with a work surface 3 on which the apparatus 1 according to the invention is mounted in turn provided with a support structure 2.
• a containment tank 4 for containing the glue is mounted on the work surface 3 .
• a containment tank 4 is capable of receiving both polyurethane glue, in particular in cartridge form and thermofusible glue (for example EVA) in particular in the form of grains or beads.
• the containment tank has associated heating means of the glue to transform it to fluid state, per s ⁇ known, preferably consisting of electrical resistances not illustrated in the figures.
• the containment tank 4 feeds, preferably through an Archimedean screw, a head 5 for the distribution of the glue suitable for spreading it on a tape (or on a panel) through a dosaging roller 6 rotating in contact with the same tape.
• a paddle 7 is foreseen that is thrusted elastically to press the tape against the roller 6.
• the containment tank 4 and the distribution head 5 of the glue are made from highly viscous material, in particular consisting of aluminium covered with teflon.
• the dosaging roller 6 is made to rotate by a motor through transmission means preferably comprising a transmission shaft rotatably supported by bearings and suitable for transmitting motion to the dosaging roller 6 receiving it through a cardan joint from an actuation shaft connected to the motor.
• transmission means preferably comprising a transmission shaft rotatably supported by bearings and suitable for transmitting motion to the dosaging roller 6 receiving it through a cardan joint from an actuation shaft connected to the motor.
• the support structure 2 of the apparatus is made so as to allow simple and easy disassembly of the containment tank 4 of the glue for replacement with another different size or functional characteristic for example connected to the type of glue.
• a return duct 8 is foreseen suitable for making the glue that has arrived in excess in a collection chamber defined by the dosaging roller go back into the containment tank 4 through the effect of the rotation of said dosaging roller.
• the distribution head 5 comprises a circulation valve 9 placed in interference with the return duct 8, which is able to be moved between a first open position, which in normal operating conditions allows the glue to go back into the containment tank 4 transferring the excess from the collection chamber, and a first closed position that prevents the glue from going back into the containment tank 4 determining an overpressure upstream of the same circulation valve 9.
• An expulsion valve 10 is also foreseen, placed in interference with the return duct 8 upstream of the circulation valve 9 and able to be moved between a second closed position, which with the circulation valve 9 in the first open position allows the inflow of glue from the collection chamber to the containment tank 4 through the circulation valve 9, and a second open position, which with the circulation valve 9 in closed position determines the outflow of the glue through an expulsion channel 11 placed in communication with the return duct 8.
• the circulation valve 9 and the expulsion valve 10 are replaced by a three-way valve (not illustrated) that selectively places the collection chamber in communication with the containment tank 4 through the aforementioned return duct 9 and with the aforementioned expulsion channel 11.
• the latter ends with an outlet mouth 12 preferably arranged on the outer side 13 of the glue distribution head 5, opposite the inner side 14 where the dosaging roller 6 is arranged to distribute the glue.
• the circulation valve 9 and the expulsion valve 10 are inserted too intercept the return duct through seats formed on the upper face of the distribution head.
• the glue that comes out from the outlet mouth 12 can be easily collected in a suitable container. Therefore, operatively, at the end of a work cycle it is easy to take care of the evacuation of the glue remaining in the containment tank 4 and in the distribution head

Landscapes

• Coating Apparatus (AREA)
• Application Of Or Painting With Fluid Materials (AREA)
• Manufacturing Of Electric Cables (AREA)
• Paints Or Removers (AREA)
• Adhesives Or Adhesive Processes (AREA)
• Treatment Of Fiber Materials (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

Family

ID=39880528

Family Applications (1)

Country Status (3)

Cited By (2)

Families Citing this family (2)

Citations (2)

Family Cites Families (8)

• 2007
  • 2007-05-25 IT ITPD20070184 patent/ITPD20070184A1/it unknown
• 2008
  • 2008-05-21 WO PCT/IB2008/001345 patent/WO2008146140A2/en not_active Ceased
  • 2008-05-21 EP EP08751048A patent/EP2162236B1/en active Active

Patent Citations (2)

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