EP3315209B1 - System zum aufbringen von temporär wirkenden oberflächenfunktionsbeschichtungen mittels sprühen - Google Patents

System zum aufbringen von temporär wirkenden oberflächenfunktionsbeschichtungen mittels sprühen Download PDF

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Publication number
EP3315209B1
EP3315209B1 EP17194309.5A EP17194309A EP3315209B1 EP 3315209 B1 EP3315209 B1 EP 3315209B1 EP 17194309 A EP17194309 A EP 17194309A EP 3315209 B1 EP3315209 B1 EP 3315209B1
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EP
European Patent Office
Prior art keywords
nozzle
needle
nozzle body
bore
duct
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
EP17194309.5A
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German (de)
English (en)
French (fr)
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EP3315209A1 (de
Inventor
Michael Karau
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/14—Arrangements for preventing or controlling structural damage to spraying apparatus or its outlets, e.g. for breaking at desired places; Arrangements for handling or replacing damaged parts
    • B05B15/18—Arrangements for preventing or controlling structural damage to spraying apparatus or its outlets, e.g. for breaking at desired places; Arrangements for handling or replacing damaged parts for improving resistance to wear, e.g. inserts or coatings; for indicating wear; for handling or replacing worn parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/26—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device
    • B05B7/262—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device a liquid and a gas being brought together before entering the discharge device
    • B05B7/265—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device a liquid and a gas being brought together before entering the discharge device the liquid being fed by gravity, or sucked into the gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D5/00—Other working of veneer or plywood specially adapted to veneer or plywood
    • B27D5/003—Other working of veneer or plywood specially adapted to veneer or plywood securing a veneer strip to a panel edge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
    • B05B1/3086—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a grooved body, which is movable in the outlet orifice

Definitions

  • the invention relates to a system for applying temporary-acting surface functional coatings by spraying by one or more pneumatic two-fluid nozzles with nozzle body, which is connected to at least one storage vessel, wherein the storage vessel is filled or filled with sprayable surface functional coating liquid and further with a compressed gas, in particular compressed air source which can be connected to the respective two-fluid nozzle in order, according to the principle of a jet pump or injector nozzle, to convey the surface functional coating liquid and to apply it to a surface to be treated by spraying according to the preamble of claim 1 or 12.
  • a compressed gas in particular compressed air source
  • From the DE 10 2005 024 005 A1 is a method for edge coating a furniture panel previously known. According to this method, a release agent is applied after gluing a first edge band and before gluing a further edge band extending transversely to the first edge band on the edge corner region of the glued first edge band assigned to the second edge band.
  • spray nozzles are respectively arranged in the edge corner areas of the opposing coated edges, with which a liquid release agent is sprayed onto these edge corner areas of the glued edge band.
  • release agents for example based on alcoholic liquids for the purpose of improving the training of glued edgebands of furniture panels for years belongs to the prior art and have extensive experience in the related spraying of release agents, it has been found that the nozzles used A considerable amount of wear and tear is subject with the result that after more or less manageable periods either an insufficient spray jet is given or the amount of release agent to be applied is increased with the result that inadmissible concentrations of partially harmful substances are present at the workplace.
  • the system according to the invention should, under all circumstances of an industrial environment, be able to apply reproducible amounts of the corresponding functional coating by means of spraying, the duration of use of the nozzles being increased and the amount of surface functional coating to be applied being subject to reduction.
  • the invention is based on a system for applying temporary-acting surface-functional coatings by means of spraying, wherein the surface-functional coating is to be applied to an object by means of one or more pneumatic two-substance nozzles.
  • the pneumatic two-substance nozzles have a nozzle body, which communicates with at least one storage vessel, wherein the storage vessel is filled with sprayable surface function coating or can be filled accordingly.
  • the storage vessel is filled with sprayable surface function coating or can be filled accordingly.
  • hose connections exist in a known manner.
  • the respective nozzle body of the corresponding two-fluid nozzle is connected to a compressed gas source, in particular a compressed air source in order to promote the surface functional coating liquid and applied by spraying onto the surface to be treated according to the principle of a jet pump or an injector nozzle.
  • a compressed gas source in particular a compressed air source
  • the connection between the respective two-fluid nozzle, that is, the nozzle body, and the storage vessel is formed sealed. It is thereby prevented that contaminants from the industrial environment enter the storage vessel and may possibly be transported via the surface functional coating liquid through the nozzle towards the surface to be treated with adverse consequences in terms of nozzle wear on the one hand and a possibly insufficient effect of the surface function coating on the surface to be treated.
  • a provided for pressure equalization on the storage vessel opening is provided with a filter body or a filter insert.
  • the respective two-fluid nozzle of the system according to the invention is designed as a minimum quantity nozzle valve with an adjusting device in the nozzle body.
  • the adjusting device has, in a first embodiment, a preferably interchangeable needle with conical seat tip.
  • the conical seat tip dips into a form complementary hole in the nozzle body to obtain an annular gap.
  • the annular gap can be increased or even reduced and thereby the amount of surface functional coating liquid supplied to the spray jet can be specified.
  • the needle in the region of the apex, has a central first bore oriented in the longitudinal direction of the needle over a predetermined path, which intersects with a second bore oriented in the needle transverse direction, such that even with a closed annular gap, an amount of liquid defined over the bore dimensions can be extracted.
  • the supply of a first quantity of surface functional coating liquid is basically ensured, and with the opening of the annular gap by nozzle adjustment a larger amount of liquid to be supplied can be added.
  • the risk of clogging of the annular gap is reduced for small annular gap widths, since a suction is created by the liquid quantity supplied via the first and second bores, which optionally entrains particles attached to the annular gap or located there.
  • the nozzle body for receiving the needle located in a needle holder on a blind hole, wherein the needle holder is screwed into the blind hole.
  • the needle holder has an external thread, which is designed to be complementary to an internal thread of the blind hole bore.
  • the needle holder in turn has a passage opening for guiding the needle, wherein the passage opening and the needle in turn have complementary threads for needle adjustment.
  • the complementary threads in the through hole (internal thread) and the needle (external thread) are realized as a so-called fine thread.
  • a sealing cap preferably attachable by screwing, which seals the needle against the environment in conjunction with a conventional sealing ring.
  • the cap can be performed as a known stuffing box.
  • the blind hole is in communication with a guided through the nozzle body first channel, wherein the first channel terminates in an opening for supplying the liquid.
  • This opening may have a screw thread or a screw connection or pass into such a screw connection in order to be able to produce a hose connection, for example.
  • the annular gap in turn merges into a second channel, which leads to a third channel, to which the compressed gas source can be connected. Also in this respect, the related end of the third channel to a screw or the like means.
  • a two-substance mixture channel connects, which opens into a nozzle opening of the nozzle body.
  • the pressure equalization opening is formed with filter body in a known closure or screw or bayonet cap of the storage vessel.
  • the needle has an adjustment aid at its end opposite the cone seat tip.
  • This adjustment aid can be designed, for example, as a thumbwheel.
  • a second embodiment of the invention is based on the basic construction of a similar nozzle body with adjusting device according to the first embodiment.
  • the adjusting device of the second embodiment has no interchangeable needle, but a, possibly interchangeable ringtex rave.
  • the ringtex FA is preferably designed as a grub screw and can be screwed into a blind hole provided with an internal thread in the nozzle body.
  • the threaded insert has a central longitudinally oriented first bore which intersects with a second, laterally oriented bore. About the bore dimensions, a defined amount of liquid is sucked.
  • the blind hole is in communication with a guided through the nozzle body first channel, wherein the first channel terminates in an opening for supplying the liquid.
  • a recess is provided, which merges into a second channel, which leads to a third channel, to which the compressed gas source can be connected.
  • a two-component mixture channel follows, which opens into the nozzle opening of the nozzle body.
  • the preferably designed as a set screw screw insert is the diameter side in the region of his dipping into the blind hole thread-free end diameter side offset. In this respect, a circumferential gap for liquid supply remains.
  • a union nut on the nozzle opening side.
  • This union nut is capable of receiving an exchangeable, jet-forming orifice in order to ensure as laminar a flow as possible in the area of the nozzle opening over a given distance.
  • the two-fluid nozzles according to the first or second embodiment are quite fundamentally suitable for metered application of surface functional coating liquids to a wide variety of surfaces or bodies.
  • the use of a storage vessel with sealed compound two-fluid nozzle and the storage vessel and pressure equalization opening with filter body or filter cartridge is therefore not mandatory, but advantageous.
  • the system according to the invention with the illustrated two-fluid nozzle is extremely reliable even under very heavy industrial environmental load and corresponding contamination.
  • the materials of the two-component nozzle in addition to the necessary connection means for supplying a compressed gas or the surface functional coating liquid, have no such electrical conduction potentials that undesired electrochemical corrosion occurs.
  • the in the Fig. 1 to 5 pneumatic two-fluid nozzles shown used, for example, in a system for applying temporary-acting surface functional coatings by spraying.
  • This may be a special coolant, which is used in a method for processing a board made of wood or a wood-based material, in particular when attaching appropriate edge bands.
  • it may be a surface function coating according to the German patent application DE 10 2015 012 825.5 that is to say a sprayable, non-corrosive surface-active coating based on an alcoholic acetate solution, wherein a powder-forming functional substance is added to a melt to embed the corresponding powder particles, then the thus enriched melt by addition of a glycol in a solution transfer and subsequently form associating colloids by introducing into demineralized water as a carrier, which envelop the embedded powder particles, wherein the thus pretreated function determining substance of the alcoholic acetate solution is added.
  • the function-determining substance may be polytetrafluoroethylene (PTFE) nanoparticles, but also metallic powders or inorganic pigments.
  • PTFE polytetrafluoroethylene
  • the aforementioned melt is provided on the basis of non-ionic, low-foam surfactants, in particular on the basis of block copolymers.
  • the enriched melt can be added to hexylene glycol.
  • the total mixture has salt for ion formation.
  • the surface function coating briefly described above has a minimum water content of in particular ⁇ 2% in the total mixture.
  • the aforementioned surface function coating is suitable for cleaning and smoothing plastic surfaces, for treating edge areas of furniture panels but also for application to plastic edge bands before, during and / or after fixing the edge bands to panels, in particular furniture panels.
  • At least one storage vessel is present to receive the surface function coating.
  • a compressed gas source in particular a compressed air source is provided which can be connected to the respective two-fluid nozzle to promote the surface functional coating liquid according to the principle of a jet pump or an injector nozzle and applied by spraying on the respective surface to be treated.
  • a provided for pressure equalization on the storage vessel opening has a filter body or a filter cartridge.
  • two-fluid nozzle system is designed as a minimum quantity nozzle valve with a nozzle body 1.
  • the nozzle body 1 may consist of a metallic material.
  • the nozzle body 1 is also produced from a plastic material.
  • the minimum quantity nozzle valve according to the invention has an adjusting device 2 in the nozzle body 1.
  • the adjusting device comprises a preferably interchangeable needle 3.
  • the needle 3 has a conical seat tip 4.
  • the conical seat tip 4 dives into a form-complementary hole 5 in the nozzle body 1 to obtain an annular gap 6 a.
  • the needle 3 has in the region of the apex 4 a centric, oriented in the needle longitudinal direction first bore 7.
  • This first bore 7 intersects with a second, in the needle transverse direction oriented bore 8 such that even when the annular gap 6 is closed, a defined over the bore dimensions amount of liquid can be sucked.
  • a blind hole 10 is provided for receiving the needle located in a needle holder 9 3.
  • the needle holder 9 is preferably fixed in the blind hole 10 by screwing.
  • the needle holder 9 has a through hole 11 for guiding the needle 3, wherein the through hole 11 and the needle 3 have complementary threads for needle adjustment. This may in particular be a fine thread.
  • the blind hole 10 communicates with a guided through the nozzle body 1 first channel 12 in communication, wherein the first channel 12 terminates in an opening 13 for supplying the liquid.
  • This opening 13 may be a screw connection known per se.
  • the annular gap 6 merges into a second channel 14, which leads to a third channel 15, to which the compressed gas source can be connected by means of a connection 16.
  • the third channel 15, but also a binary mixture channel 17, is realized by introducing a bore in the nozzle body.
  • At least the channel 15, but in particular also the channel 17, is realized by a pressed-in and / or glued-in sleeve 150 inserted into a larger-caliber bore in the nozzle body 1.
  • the two-substance mixture channel 17 connects, which opens into a nozzle opening 18 of the nozzle body 1.
  • the needle 3 has at its opposite end of the conical seat tip 4 an adjustment, this adjustment can be formed, for example, as a knurled wheel 19.
  • a cap 20 similar to a union nut accommodates the sealing of the needle 3 with respect to the nozzle body 1 and the needle holder 9, respectively.
  • sealing means for example in the form of an O-ring 21, with the sealing effect similar to a stuffing box.
  • the needle 3 may further include marks 22 for reproducible needle adjustment.
  • the basic structure of the nozzle body is formed with channels together with compressed gas and liquid supply analogous to the first embodiment.
  • nozzle body 1 which may for example consist of light metal, in particular an aluminum alloy.
  • an adjusting device 30 is present, which now no interchangeable needle, but a fferably published 31 includes.
  • the errough Faculty 31 can be executed for example as a grub screw.
  • the threaded insert 31 includes a central longitudinally oriented first bore 70 that intersects with a second, laterally oriented bore 80.
  • the openings of the bore 80 are in particular in the Figure 3 recognizable.
  • central, longitudinally oriented first bore 70 extends only to the region of the transverse oriented bore, that is not passed through the entire erlang Citation 31 therethrough.
  • a blind hole 10 is present in the nozzle body 1 for receiving the ringand sensiblees 31 as in the first embodiment.
  • the ringand Gla 31 has over part of its longitudinal extent an external thread which is complementary to an internal thread in the blind hole 10.
  • the pointing into the blind hole 10 end of the erlang Federationes 31 has a longitudinal portion 81 a diameter reduction, that is, in the section 81, the diameter is detached and thread-free. This leaves between the wall of the blind hole 1 and the shell in section 81, a corresponding gap for liquid inlet with respect to an opening 13 for supplying the liquid (in the Fig. 3 and 4 not shown, but basically similar to Fig. 2 according to the first embodiment).
  • a preferably conical recess 6 is introduced, which merges into the channel 14, which leads to the channel 15 to which the compressed gas source (not shown) can be connected.
  • a two-substance mixture channel 17 connects, which opens into the nozzle opening.
  • Nozzle opening side is still a replaceable union nut 32 (see Fig. 4 ) to a corresponding threaded end 33 ( Fig. 3 ) screwed.
  • the union nut 32 serves to receive a jet-forming diaphragm 34 and concentrically in front of the nozzle opening 18 (see Fig. 3 ) to place.
  • exemplary jet-shaping diaphragm 34 manages to produce a very laminar, non-diverging liquid jet, which extends to a distance range of 5-10 cm, calculated from the exit point on the nozzle body.
  • FIG. 5 The sectional view through a further embodiment of the pneumatic two-fluid nozzle used in the system according to the invention Fig. 5 goes in turn from a nozzle body 1 and the other means, as according to Fig. 1 described, out.
  • a conical seat tip 4 made of a plastic material is used. Instead of a plastic material, this may also be an insert made of a ceramic material or the like.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Nozzles (AREA)
EP17194309.5A 2016-10-26 2017-10-02 System zum aufbringen von temporär wirkenden oberflächenfunktionsbeschichtungen mittels sprühen Active EP3315209B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202016106020 2016-10-26
DE202016106913.0U DE202016106913U1 (de) 2016-10-26 2016-12-13 System zum Aufbringen von temporär wirkenden Oberflächenfunktionsbeschichtungen mittels Sprühen

Publications (2)

Publication Number Publication Date
EP3315209A1 EP3315209A1 (de) 2018-05-02
EP3315209B1 true EP3315209B1 (de) 2019-03-13

Family

ID=60254736

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17194309.5A Active EP3315209B1 (de) 2016-10-26 2017-10-02 System zum aufbringen von temporär wirkenden oberflächenfunktionsbeschichtungen mittels sprühen

Country Status (4)

Country Link
EP (1) EP3315209B1 (pt)
DE (1) DE202016106913U1 (pt)
ES (1) ES2729769T3 (pt)
PT (1) PT3315209T (pt)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3819032A1 (de) 2019-11-07 2021-05-12 Michael Karau Bereitstellungssystem zum aufbringen von unterschiedlichen, anwendungsfallbezogenen, temporär wirkenden oberflächenfunktionsbeschichtungen

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018102737B3 (de) 2018-02-07 2019-03-07 Bernd Riepe Sprüheinrichtung sowie Verfahren zur Einstellung der Sprüheinrichtung
DE202018100671U1 (de) 2018-02-07 2018-02-14 Bernd Riepe Sprüheinrichtung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE489537C (de) * 1930-01-17 Karl Ludwig Dipl Ing Spritzgutduese mit einstellbarer Austrittsoeffnung
DE102005024005A1 (de) 2005-05-25 2006-11-30 Riepe Gmbh & Co. Kg Verfahren zum Kantenbeschichten einer Möbelplatte
DE102015012825A1 (de) 2015-10-02 2016-04-28 Daimler Ag Verfahren zur Bestückung einer bereits bestückten Leiterplatte

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3819032A1 (de) 2019-11-07 2021-05-12 Michael Karau Bereitstellungssystem zum aufbringen von unterschiedlichen, anwendungsfallbezogenen, temporär wirkenden oberflächenfunktionsbeschichtungen

Also Published As

Publication number Publication date
PT3315209T (pt) 2019-06-14
DE202016106913U1 (de) 2017-10-17
EP3315209A1 (de) 2018-05-02
ES2729769T3 (es) 2019-11-06

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