EP3639931A1 - Dispositif de revêtement et son procédé - Google Patents

Dispositif de revêtement et son procédé Download PDF

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Publication number
EP3639931A1
EP3639931A1 EP19196572.2A EP19196572A EP3639931A1 EP 3639931 A1 EP3639931 A1 EP 3639931A1 EP 19196572 A EP19196572 A EP 19196572A EP 3639931 A1 EP3639931 A1 EP 3639931A1
Authority
EP
European Patent Office
Prior art keywords
paper
workpiece
winding
roller
unwinding
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
EP19196572.2A
Other languages
German (de)
English (en)
Other versions
EP3639931B1 (fr
Inventor
Gloria VALTORTA
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.)
Elmag SpA
Original Assignee
Elmag SpA
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Filing date
Publication date
Application filed by Elmag SpA filed Critical Elmag SpA
Publication of EP3639931A1 publication Critical patent/EP3639931A1/fr
Application granted granted Critical
Publication of EP3639931B1 publication Critical patent/EP3639931B1/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
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
    • B05B14/30—Arrangements for collecting, re-using or eliminating excess spraying material comprising enclosures close to, or in contact with, the object to be sprayed and surrounding or confining the discharged spray or jet but not the object to be sprayed

Definitions

  • the present invention relates to a machine for painting pieces and method thereof.
  • the invention relates to a machine and relative method for conveying pieces, such as panels and the like, to be subjected to treatment or processing, and in particular to be painted, designed and manufactured to reduce the consumption of the absorbent paper necessary to carry out the painting step.
  • an input transport section which can include a first roller table, on which the panel can be arranged by an operator or an automatic loading/handling system, such as a handling robot and the like
  • a painting station having a conveyor belt unit, internally arranged for the passage of the panel to be painted, an inlet opening, for the entry of the panel to be processed, in correspondence of which said input transport section is arranged an outlet opening, for the exit of the painted panel, in which said painting station comprises means for spraying the paint on the surface of the panel
  • a second exit transport section which can include a second roller plane, in which the painted panel can be taken by an operator or a generic automatic unloading/handling system, such as a robot, arranged in correspondence of said outlet opening.
  • Said painting machines for panels also comprise a unwinding reel, arranged in correspondence of said inlet opening, on which the paper is wound, typically absorbent paper, or plastic films in general, on which the panels to be painted are arranged on, and a winding roller, arranged in correspondence of said outlet opening, on which the paper can be re-wound after its use.
  • the paper (or the plastic film) is placed on the conveyor belt, sliding on it in a coordinated fashion, while the panel slides inside the painting station.
  • a machine for the treatment such as painting, of workpieces, such as panels, made of wood, plastic, fiberglass, glass, metal and the like, comprising means for the treatment of at least one of said workpieces to be treated, and a dragging system, for dragging a paper band, wherein the dragging system comprises a winding roller and a winding/unwinding roller, wherein said machine is characterized in that the winding roller wind the dirty paper, which has been dirtied by the treatment of at least one workpiece by means of said treatment means, in that said winding/unwinding roller wind or unwind the clean paper, wherein the clean paper is intended to support at least one workpiece to be treated by means of said treatment means and to absorb or collect the waste of the treatment of said treatment means, becoming dirty paper, and in that said machine includes return movable means, movable from a rest position to an operating position, wherein said return movable means pass from said rest position to said operating position to change the path of the paper unwound or wound by
  • said return movable means may comprise a tensioning roller.
  • said machine may comprise a main conveyor for loading and removing at least one of the said workpieces to be treated or painted.
  • said winding roller may be arranged in correspondence of said main conveyor.
  • said machine may comprise a painting station, having a support base, on which the workpiece to be painted is placed during the treatment, and an inlet opening for the introduction of said workpiece to be painted in said painting station, wherein said main conveyor is placed in correspondence of said inlet opening.
  • said dragging system may comprise a dragging belt, arranged within said painting station substantially in correspondence of said support base, wherein the paper rests and is dragged during the advancement, for supporting the workpiece to be painted.
  • said treatment means may comprise a painting robot of anthropomorphic, Cartesian and similar type.
  • said machine may comprise an auxiliary conveyor, to support said workpiece to allow the variation of said path of the paper unwound or wound by said winding/unwinding roller, and in that said painting station has an outlet opening, wherein said auxiliary conveyor is arranged in correspondence of said outlet opening.
  • said winding/unwinding roller is arranged in correspondence of said auxiliary conveyor.
  • said treatment means may comprise a reciprocating spraying arm.
  • said winding roller may be arranged in correspondence of said auxiliary conveyor and said winding/unwinding roller is arranged in correspondence of said main conveyor.
  • said machine may comprise a logic control unit for the operating coordination of said machine.
  • step A may comprise the following substeps: A1. winding said clean paper; and A2. gradually reducing the path of said clean paper.
  • said clean paper is wound for a section equal to at least the length of said at least one workpiece to be treated and of the support base.
  • step C may comprise the following substeps: C1. unwinding said clean paper; C2. winding up said dirty paper; and C3. gradually increasing the path of said paper.
  • said clean paper may be unwound for a section equal to at least the length of said at least one workpiece to be treated and of the support base.
  • said step A may comprise the following substeps: A3. unwinding said clean paper; and A4. gradually increasing of the path of said paper; and A5. wrapping said dirty paper.
  • said clean paper may be unwound for a section equal to at least the length of said at least one workpiece to be treated and of the supporting base.
  • said step C may comprise the following substeps: C4. wrapping said clean paper; and C5. gradually reducing the path of said paper.
  • said clean paper may be wound for a section equal to at least the length of said at least one workpiece to be treated and of the support base.
  • said step B may comprise the painting of said piece.
  • said method may provide for at least one winding roller, for winding said dirty paper, at least one winding/unwinding roller for unwinding and rewinding said clean paper, and return movable means, such as a return roller, movable from a rest position to an operating position and vice-versa.
  • a painting machine 1 according to the present invention can be seen.
  • Said machine 1 essentially comprises a main conveyor 3, which can comprise a roller table, in which the panel P to be processed is arranged by an operator U or by a loading robot or any automatic loading/handling system, a painting station 2, an auxiliary conveyor 4, which also in this case may possibly comprise a roller table, and a dragging system 5, for dragging absorbent paper 6.
  • a main conveyor 3 which can comprise a roller table, in which the panel P to be processed is arranged by an operator U or by a loading robot or any automatic loading/handling system, a painting station 2, an auxiliary conveyor 4, which also in this case may possibly comprise a roller table, and a dragging system 5, for dragging absorbent paper 6.
  • the painting station 2 comprises a chassis 21, having an inlet opening 211 and an outlet opening 212.
  • a dragging belt 55 (better described below), which also forms a support base 22, on which the paper rests and is dragged during the advancement, and a reciprocating spraying arm 23, to paint the panel P when it passes under it.
  • the main conveyor 3 comprises, in the embodiment, a rollers plane having a plurality of idle or motorized rollers, on which the panel P to be painted can slide.
  • a rollers plane having a plurality of idle or motorized rollers, on which the panel P to be painted can slide.
  • different conveyor variants according to the prior art can be possible, such as those of belt type and the like.
  • Said main conveyor 3 is arranged at said inlet opening 211 of said chassis 21.
  • the auxiliary conveyor 4 structurally analogous to said main conveyor 3, is arranged at said outlet opening 212 of said chassis 21.
  • the dragging system 5 comprises a winding roller 51, capable of winding, shown in the embodiment arranged in correspondence of or near said inlet opening 211, on which a reel of absorbent paper 6 is wound, intended to be placed underneath the piece (the panel P) to be painted during the painting phases to absorb the overspray.
  • Said dragging system 5 also comprises a winding/unwinding roller 52, capable of both winding and unwinding the absorbent paper 6, which in the embodiment shown is arranged substantially in correspondence of said outlet opening 212.
  • the absorbent paper 6 can be rewound, owing to the retraction of the tensioning roller 54.
  • the dragging system 5 further comprises said dragging belt 55 moved by dragging rollers 53, possibly motorized, to allow the sliding of the absorbent paper 6 on said dragging belt 55 and then on said support base 22.
  • said dragging system 5 comprises transmission means, as in the present case, a tensioning roller 54, arranged near said winding roller 51, capable of assuming a rest position and one or more extracted positions, in which it is moved away from said winding roller 51.
  • a tensioning roller 54 when said tensioning roller 54 is extracted, it extends the path, during the unwinding of paper from said winding/unwinding roller 52 and shortens it during winding, always winding on a winding/unwinding roller 52.
  • Said tensioning roller 54 is a possible embodiment of the movable transmission means, which can possibly also be realized in further configurations and with other members.
  • the operation of the painting machine 1 according to the present invention is coordinated by a logic control unit 7, which executes an appropriate program that is the treatment method of the workpiece to be machined, installed in it.
  • said control logic unit 7 comprises a processor.
  • a first embodiment or operating mode of the painting machine 1 is shown in figures 2A-2E .
  • an operator U or an automatic loading system positions the panel P or even a load or a plurality of panels P (in the figure for the sake of simplicity a single panel P is shown) on the main conveyor 3.
  • the absorbing paper 6 has a section of dirty paper 62, which has already been used in a previous activity of painting a previous piece or panel P, mainly wound on said winding roller 51, and a section of clean paper 61, not yet used and which is mainly wound on said winding/unwinding roller 52.
  • the separation line separating the dirty paper portion 62 from the clean paper portion 61 is indicated with 63.
  • the length of the panel P is indicated by the letter L, while the support base 22 has a lateral length indicated with the letter B.
  • L is greater than B, in particular it is assumed that L is equal to 3000 mm, while B is equal to 2000 mm, as reported directly in the figures.
  • Different dimensions and proportions can be used both for the length L of the workpiece P and for the lateral length B of the support base 22 of the painting station 2.
  • said winding roller 51 and said winding/unwinding roller 52 are stationary, said tensioning roller 54 is in the operative position, thus allowing to have a section of clean absorbent paper 61 of a length equal to L (in the indicated example 3000 mm) below the main conveyor 3 such as to allow the subsequent passage through the machine of the panel P onto the clean absorbent paper 61 up to the auxiliary conveyor 4, without unwinding the dirty paper 62 wound on said winding roller 51.
  • the panel P advances on the main conveyor 3 in the direction indicated with the arrow A, enters the painting station 2, resting on the clean paper 61 as it advances, owing to the dragging rollers 53 which drag the dragging belt 55.
  • the reciprocating spraying arm 23 does not spray, i.e. it does not paint the panel P, while said winding/unwinding roller 52 winds the clean paper 61, which is arranged below the panel P and is dragged by means of a driving dragging belt 55 from said dragging rollers 53.
  • the tensioning roller 54 is gradually brought to the rest position, thus making sufficient dirty paper 62 (or already used in previous spraying steps) such as to cover the entire support base 22, inside the painting station 2 available. This avoids wasting clean paper 61 unnecessarily.
  • the separation line 63 which separates the clean paper 61 from the dirty paper 62 is substantially in correspondence with said outlet opening 212.
  • Said winding roller 51 is therefore stationary, so that the dirty paper is not carried out 62.
  • the panel P returns moving on the transport systems, re-entering the painting station 2, resting on clean paper 61.
  • the panel P moves in the direction indicated with the arrow R, contrary to that of the arrow A.
  • the spraying arm 23 is active and the panel P is thus subjected to painting.
  • the spraying arm 23 paints the panel moving transversely with respect to the advance direction of the same, in other words, the spraying arm 23 moves in a direction perpendicular to the table, in which figures 2A-2E are shown.
  • the winding/unwinding roller 52 unwinds clean paper 61, while the roller 51 wraps dirty paper 62.
  • the tensioning roller 54 is in rest position, in order to move forward thereafter to avoid winding up dirty paper 62, which would then have to be unwound, which would cause the risk of breaking the absorbent paper tape 6.
  • the panel P has gone out from the inlet opening 211 of the painting station, on the main conveyor 3 and the winding/unwinding roller 52 unwound clean paper 61, to allow the advancement of the panels P.
  • the tensioning roller 54 is observed, which is further extracted so as to recover the clean paper 61, necessary to arrange, in correspondence with said main conveyor 3, sufficient clean paper 61, to allow a new painting cycle without unwinding dirty paper 62, so as to avoid risks of breaking the absorbent paper band 6, often due, as mentioned, to unwinding dirty paper 62 previously wound on a reel.
  • the winding/unwinding roller 52 thus unwinds clean paper 61, while the winding roller 51 is stationary, due to the action of said tensioning roller 54, which recovers said clean paper 61.
  • the operator U or any automatic loading and unloading system, picks up the painted panel P from the main conveyor 3 and replaces it with a new panel P to be painted.
  • the reciprocator spraying arm 23 is replaced in the embodiment in question by an anthropomorphic robot 24, which is able to move and orientate the paint spraying nozzle in space to carry out the painting of a piece inside the painting station 2.
  • an anthropomorphic robot 24 instead of the anthropomorphic robot 24 a Cartesian robot or generic robot can be installed.
  • said painting machine 1 does not provide the auxiliary conveyor 4.
  • an operator U or an automatic loading system positions the panel P or the load of panels P on the main conveyor 3.
  • said winding roller 51 and said winding/unwinding roller 52 are stationary.
  • the tensioning roller 54 is in the operating position and this allows to have a sufficient length of clean paper 61 under the main conveyor 3 without having to unwind the dirty paper 62 from the winding roller 51, to allow the subsequent advancement of the panel P (or loading of panels P) up to the inside of the painting station 2 on clean paper 61, without having to unwind from the roll arranged on said roller 51 of dirty paper 62.
  • a quantity of clean paper 61 is provided, substantially of the length L of the panel P.
  • a further portion of paper is generally provided before and after the panel P to allow it to be painted.
  • the piece advances on the main conveyor 3 along the direction A, entering the painting station 2, and is placed on the clean paper 61, advanced by said dragging belt 55 moved by said dragging rollers 53, while the winding/unwinding roller 52 winds said clean paper 61.
  • the separation line 63 which separates the clean paper 61 from the dirty paper 62 is substantially in correspondence of the inlet opening 211.
  • the panel P thus stops inside the painting station 2, arranged on the clean paper 61 on said support base 22.
  • said winding/unwinding roller 52 then winds the clean paper 61.
  • the tensioning roller 54 is gradually arranged towards said rest position, thus making the clean paper 61 wind, as said above, from said winding/unwinding roller 52 thus making available sufficient clean paper to house the whole panel P (or the load of panels P) inside the painting station 2.
  • the roller 51 is stationary and dirty paper 62 is thus not carried out, preventing the risks of breaking it.
  • the anthropomorphic robot 24, positioned inside the painting station 2 completes the painting cycle.
  • the panel P or the panels P arranged inside the painting station 2 are painted while they are still inside the painting station 2.
  • Both said winding roller 51 and said winding/unwinding roller 52 are stationary, while the tensioning roller 54 is arranged in a rest position.
  • the panel P or the load of panels P is moved along the direction of the arrow R by means of the dragging rollers 53, thus coming out from the painting station 2 by arranging itself on the main conveyor 3.
  • the winding/unwinding roller 52 unwinds clean paper 61, while the winding roller 51 winds the dirty paper 62.
  • the tensioning roller 54 is in its rest position, but it can then advance so as to recover clean paper 61, to be unwound from said winding/unwinding roller 52, to prevent winding and then unwinding dirty paper 62.
  • the tensioning roller 54 is moved from said rest position towards said operating position, so as to ensure sufficient clean paper 61 below the main conveyor 3, such as to allow the painting cycle to be performed again, i.e. to arrange sufficient clean paper 61 to be placed under panel P or panels P to be painted without unloading the dirty paper 62.
  • said winding/unwinding roller 52 unwinds clean paper 61 and said winding roller 51 is stationary.
  • the operator U or an automatic loading and unloading system removes the panel P or the panels P painted from the main roller table and replaces them with new panels P to be painted.
  • a reciprocating spraying arm 23 is provided inside the painting station 2.
  • winding/unwinding roller 52 is arranged in correspondence of the main conveyor 3.
  • the operator U or an automatic loading system positions the panel P or the load of panels P on the main conveyor 3 of the device 1.
  • Said winding roller 51 and said second winding/unwinding roller 52 are stationary.
  • the tensioning roller 54 is in rest position and the dirty paper 62 is arranged on said support base.
  • the separation line 63 which separates the clean paper 61 from the dirty paper 62, is substantially in correspondence with said outlet opening 212.
  • the spraying arm is active, so that the panel P is painted.
  • the winding/unwinding roller 52 unwraps clean paper 61, while the winding roller 51 wraps dirty paper 62.
  • the tensioning roller 54 is in the rest position, to be extracted subsequently, so as to prevent winding dirty paper 62, which would otherwise subsequently be necessary to unwound.
  • the tensioning roller 54 moving into the operating position, has allowed the maintenance under the auxiliary conveyor 4 of a length of dirty paper 62 sufficient to cover the transport of the station during the return of the piece (see figure 4E ), without having to unwind dirty paper 62 and avoid wasting clean paper 61.
  • the panel P has come out painted on the auxiliary conveyor 4, while the winding/unwinding roller 52 unwinds clean paper 61 to allow the advancement of the panel P.
  • the panel P thus returns following the direction R, re-entering the painting station 2 obviously resting on clean paper 61.
  • Said winding/unwinding roller 52 winds clean paper 61 while said winding roller 51 is stationary.
  • the tensioning roller 54 is gradually retracted, so that the dirty paper is not carried out by said winding roller 51.
  • panel P comes out by positioning itself on the main conveyor 3. Said winding/unwinding roller 52 winds the clean paper 61.
  • the tensioning roller 54 is retracted, making available a sufficient length of dirty paper 62 to cover the entire support base 22 inside said painting station 2 before the entrance of a new panel P to be painted. This avoids wasting clean paper 61.
  • the winding roller 51 is stationary, so that dirty paper 62 is not wound.
  • the operator U or the automatic loading and unloading system removes the painted panel P (or the painted panels P) from the main conveyor 3 and replaces them with new panels P to be painted.
  • An advantage of the present invention is that of avoiding unwinding the roller, on which the dirty paper is wound.
  • Another advantage of the present invention is that it allows a saving of paper for painting operations.
  • a further advantage of the present invention is also that of operating both with reciprocator spray arms and with robotic arms.

Landscapes

  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
EP19196572.2A 2018-10-15 2019-09-10 Dispositif de revêtement et son procédé Active EP3639931B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102018000009428A IT201800009428A1 (it) 2018-10-15 2018-10-15 Macchina per la verniciatura di pezzi e relativo metodo.

Publications (2)

Publication Number Publication Date
EP3639931A1 true EP3639931A1 (fr) 2020-04-22
EP3639931B1 EP3639931B1 (fr) 2021-07-14

Family

ID=64902310

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19196572.2A Active EP3639931B1 (fr) 2018-10-15 2019-09-10 Dispositif de revêtement et son procédé

Country Status (3)

Country Link
EP (1) EP3639931B1 (fr)
DK (1) DK3639931T3 (fr)
IT (1) IT201800009428A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022095124A1 (fr) * 2020-11-09 2022-05-12 绍兴市柯桥区锦策智能科技有限公司 Machine de placage automatique rapide pour composites bois-plastique comportant une surface décorative

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6128475A (ja) * 1984-07-20 1986-02-08 Tokico Ltd 被塗物載置装置
US4836137A (en) * 1986-09-13 1989-06-06 Kopperschmidt-Mueller Gmbh & Co. Kg Apparatus for electrostatically spray coating workpieces with air ionizing neutralizing device
EP0858841A2 (fr) * 1996-12-23 1998-08-19 Daniel Seiler Unité de revêtement par poudre, bande transporteuse pour une telle unité et installation munie de cette unité
EP2039436A1 (fr) * 2007-09-19 2009-03-25 EISENMANN Anlagenbau GmbH & Co. KG Dispositif de revêtement, en particulier de peinture d'objets
EP3120935A2 (fr) * 2015-08-20 2017-01-25 Tianhe (Baotou) Advanced Tech Magnet Co., Ltd. Dispositif de pulvérisation et son utilisation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6128475A (ja) * 1984-07-20 1986-02-08 Tokico Ltd 被塗物載置装置
US4836137A (en) * 1986-09-13 1989-06-06 Kopperschmidt-Mueller Gmbh & Co. Kg Apparatus for electrostatically spray coating workpieces with air ionizing neutralizing device
EP0858841A2 (fr) * 1996-12-23 1998-08-19 Daniel Seiler Unité de revêtement par poudre, bande transporteuse pour une telle unité et installation munie de cette unité
EP2039436A1 (fr) * 2007-09-19 2009-03-25 EISENMANN Anlagenbau GmbH & Co. KG Dispositif de revêtement, en particulier de peinture d'objets
EP3120935A2 (fr) * 2015-08-20 2017-01-25 Tianhe (Baotou) Advanced Tech Magnet Co., Ltd. Dispositif de pulvérisation et son utilisation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022095124A1 (fr) * 2020-11-09 2022-05-12 绍兴市柯桥区锦策智能科技有限公司 Machine de placage automatique rapide pour composites bois-plastique comportant une surface décorative

Also Published As

Publication number Publication date
DK3639931T3 (da) 2021-08-09
IT201800009428A1 (it) 2020-04-15
EP3639931B1 (fr) 2021-07-14

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