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WO2003090934A1 - Machine de revetement pulverulent et procede d'enrobage - Google Patents

Machine de revetement pulverulent et procede d'enrobage Download PDF

Info

Publication number
WO2003090934A1
WO2003090934A1 PCT/JP2003/004522 JP0304522W WO03090934A1 WO 2003090934 A1 WO2003090934 A1 WO 2003090934A1 JP 0304522 W JP0304522 W JP 0304522W WO 03090934 A1 WO03090934 A1 WO 03090934A1
Authority
WO
WIPO (PCT)
Prior art keywords
powder
magnet roller
coated
powder coating
electromagnetic brush
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.)
Ceased
Application number
PCT/JP2003/004522
Other languages
English (en)
Japanese (ja)
Inventor
Masahiro Yamamoto
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.)
Nihon Parkerizing Co Ltd
Original Assignee
Nihon Parkerizing Co Ltd
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 Nihon Parkerizing Co Ltd filed Critical Nihon Parkerizing Co Ltd
Priority to AU2003236026A priority Critical patent/AU2003236026A1/en
Publication of WO2003090934A1 publication Critical patent/WO2003090934A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/057—Arrangements for discharging liquids or other fluent material without using a gun or nozzle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/08—Plant for applying liquids or other fluent materials to objects
    • B05B5/14—Plant for applying liquids or other fluent materials to objects specially adapted for coating continuously moving elongated bodies, e.g. wires, strips, pipes

Definitions

  • the present invention relates to an apparatus and a method for applying powder, and more particularly to an apparatus and method for applying powder using an electromagnetic brush.
  • electrostatic powder coating using powder coating has attracted attention as an environmentally friendly and pollution-free coating method that does not use solvents.
  • powder paint is supplied from a paint tank to a paint gun via an injector and a paint hose, and is further conveyed from an annular nozzle opening formed at the tip of the paint gun. It is sprayed toward the object with the flow.
  • the object to be coated is electrically grounded, while a high voltage is applied to a charging pin electrode provided at the tip of the coating gun. Therefore, corona discharge is generated from the charging electrode toward the object to be coated.
  • the powder paint discharged from the nozzle opening passes near the electrode, it collides with ions generated by corona discharge and is charged.
  • the powder paint charged in this way is applied on the surface of the object to be coated under the influence of the carrier air flow and the electric force along the electric force line.
  • Patent Document 1 Japanese Patent Publication No. 6 1—1 7 1 5 6 8
  • the coating is performed by spraying the powder coating from the annular nozzle opening of the coating gun together with the flow of the conveying air onto the object to be coated. It was difficult to paint uniformly.
  • An object of the present invention is to provide a powder coating apparatus and a method capable of coating powder uniformly and efficiently on the surface of an object to be coated.
  • a powder coating apparatus includes: a powder supply unit that supplies powder; and a magnet roller that is driven to rotate and mixes the powder supplied by the powder supply unit with a carrier made of a magnetic material.
  • An electromagnetic brush forming means for forming an electromagnetic brush on a magnet roller by a carrier to which the powder is adhered by friction, a magnet roller of the electromagnetic brush forming means and a predetermined distance from the magnet roller.
  • Transfer means for transferring the powder from the electromagnetic brush on the magnet roller to the object by forming an electric field between the object and the object.
  • a high voltage power supply for applying a high voltage to the magnet roller can be used.
  • a charger for charging the object to be coated and a static eliminator for discharging the object after applying the powder may be used.
  • the transfer means includes a transfer roller that is spaced apart from the magnet roller and disposed in close proximity to the object to be coated, and powder is transferred from the electromagnetic brush on the magnet roller to the object through the transfer roller. It may be configured to be transferred.
  • the electromagnetic brush forming means may have a plurality of magnet rollers, and transfer the powder from the electromagnetic brush formed on the surface of each magnet roller to the object to be coated.
  • the object When powder is applied to a rod-shaped object, the object is held in parallel with the magnet roller by a holding device, and is rotated from the electromagnetic brush to the object while rotating around its axis. It is preferred to transfer the powder.
  • a plurality of to-be-coated objects to be coated can be conveyed so as to pass through the vicinity of a magnetic roller while being rotated around respective axes by a conveyor.
  • the object When powder is applied to a wire-shaped object, the object is stretched in parallel with the magnet roller by a moving device and moved in the length direction by an electromagnetic brush. Preferably, the powder is transferred to
  • the powder coating method according to the present invention is characterized in that the powder is mixed with a carrier made of a magnetic material, frictionally charged to form an electromagnetic brush on a magnet roller by the carrier to which the powder is attached, An electromagnetic field is formed by forming an electric field between the magnet roller and an object disposed at a predetermined distance from the magnet roller. This is a method of transferring powder from an electromagnetic brush on a troller to an object to be coated.
  • the powder from the electromagnetic brush on the magnet roller it is preferable to transfer the powder from the electromagnetic brush on the magnet roller to the object to be coated while rotating the object to be coated around its axis. Further, it is preferable to transfer the powder from the electromagnetic brush on the magnet roller to the object to be coated while moving the object to be coated in a wire shape in the longitudinal direction.
  • FIG. 1 is a cross-sectional view showing the overall configuration of a powder coating apparatus according to Embodiment 1 of the present invention.
  • FIG. 2 is a view schematically showing an electromagnetic brush formed on the surface of a magnet roller.
  • 9 is a cross-sectional view showing the entire configuration of a powder coating device according to each of Embodiments 2 to 8.
  • FIG. 1 shows an entire configuration of a powder coating apparatus according to Embodiment 1 of the present invention.
  • a hopper 2 is installed on the upper part of the container 1 and an opening 3 is formed at one end of the container 1.
  • a powder supply means 4 is disposed above the hopper 2, a mixing drum 5 is rotatably provided in the container 1, and a rotary shell 6 is rotatably disposed near the opening 3.
  • a magnet 7 is fixed inside the rotating shell 6, and a doctor blade 8 is fixed in the container 1 near the outer peripheral surface of the rotating shell 6.
  • a high-voltage power supply 9 is electrically connected to the rotating shell 6.
  • a predetermined amount of a carrier 10 made of a magnetic material is accommodated in the container 1, and the powder coating material 11 is supplied from the powder supply means 4 into the container 1 via the hopper 2 at a constant supply amount. It is configured to:
  • An object to be coated 12 is arranged so as to face the opening 3 of the container 1 and to be separated from the rotating shell 6 by a predetermined distance D.
  • the object to be coated 12 is electrically grounded and conveyed 4 at a constant speed via rollers 13 by a conveying device such as a conveying belt (not shown).
  • the rotating shell 6 and the magnet 7 constitute a magnet roller, and the container 1 in which the carrier 10 is accommodated, the mixing drum 5 and the magnet controller constitute the electromagnetic brush forming means of the present invention.
  • a transition means is formed by the high-voltage power supply 9.
  • the rotating shell 6 is rotated at a predetermined speed, and a high voltage is applied to the rotating shell 6 from the high-voltage power supply 9 to form an electric field between the rotating shell 6 and the grounded object 12. .
  • the mixing drum 5 is driven to rotate while the powder paint 11 is supplied into the container 1 from the powder supply means 4 via the hopper 2, the powder paint 11 frictionally charges with the carrier 10.
  • the carrier 10 is charged to the opposite polarity to the carrier 10.
  • a carrier 10 is formed on the surface of the rotating shell 6 by a magnetic force from the magnet 7 to form an electromagnetic brush 14, and the carrier 10 is charged to the opposite polarity.
  • Powder paint 1 1 adheres.
  • the electromagnetic brush 14 formed in this way rotates together with the rotating shell 6 and reaches the opening 3 of the container 1, the electric brush formed between the rotating shell 6 and the object 1
  • the paint 11 separates from the carrier 10 and transfers to and adheres to the surface of the object 12 to be coated.
  • the powder coating 11 is applied on the surface of the object 12 to be conveyed at a constant speed, and thereafter the coating is completed by fixing the powder coating 11 by heating or the like.
  • the electromagnetic brush 14 formed on the surface of the rotary shell 6 rotates together with the rotary shell 6 even after the powder coating 11 has come off, and comes into contact with the blade 8 when the surface of the rotary shell 6 contacts the blade 8. Move away from
  • the predetermined distance D between the rotating shell 6 and the workpiece 12 is several mm. To several hundred mm. Since the powder coating 11 can be applied to the surface of the object 1 2 in a non-contact manner at such a predetermined distance D, the surface of the object 1 2 may have some unevenness. Even so, uniform coating is possible. In addition, since the tip of the electromagnetic brush 14 does not contact the object 12, Even for the object 12, the carrier 10 does not migrate to the object 12, and the powder paint 11 can be applied.
  • an existing quantitative supply device such as a screw feeder can be used.
  • the present invention is not limited to this, and a configuration in which the magnet 7 is rotated in the same direction or the opposite direction with respect to the rotating shell 6 may be adopted.
  • FIG. 3 shows a powder coating apparatus according to the second embodiment.
  • This device is different from the powder coating device shown in FIG. 1 in that a charger 15 for charging the object 12 is arranged near the opening 3 of the container 1 and a corona in the charger 15 is provided.
  • a high-voltage power supply 16 is electrically connected to the discharge electrode, and a static eliminator 17 is arranged on the downstream side of the object 12 from the charger 15.
  • FIG. 4 shows a powder coating apparatus according to the third embodiment.
  • This device is the same as the powder coating device shown in FIG. 1, except that a transfer roller 18 is arranged near the opening 3 of the container 1 at a predetermined distance from the rotating shell 6 and further separated from the transfer roller 18. Then, the object to be coated 12 is arranged.
  • the transfer roller 18 is provided with a driving unit (not shown) for rotationally driving and a charger (not shown) for charging the surface of the transfer roller 18.
  • the powder paint 11 is detached from the electromagnetic brush 14 on the rotary seal 6 and transferred to the transfer roller 18, and further transferred from the transfer roller 18 to the surface of the object 12 and adheres thereto. Even in this manner, the powder coating 11 can be applied to the object 12 in the same manner as in the first embodiment.
  • the object to be coated 12 may be arranged in contact with the transfer roller 18. Further, in the third embodiment, the charger 15 and the static eliminator 17 shown in the second embodiment may be further arranged.
  • FIG. 5 shows a powder coating apparatus according to the fourth embodiment.
  • This device is different from the powder coating device shown in FIG. 1 in that two openings 19 are formed facing the container 1 upward, and a rotating shell 6 and a magnet 7 are formed inside these openings 19, respectively. It is equipped with a magnetic controller.
  • a high voltage power supply 9 is electrically connected to both rotary seals 6.
  • chargers 15 are respectively disposed near both openings 19, and a high-voltage power supply 16 is electrically connected to a corona discharge electrode in each charger 15 and furthermore, chargers 15
  • the static eliminator 17 is disposed downstream of the object 12 to be coated.
  • Electromagnetic brushes 14 are respectively formed on the surfaces of both rotating shells 6, and the objects to be coated 12 are charged by chargers 15 near their respective openings 19.
  • the powder paint 11 is transferred from the electromagnetic brush 14 to the surface of the workpiece 12 through the opening 19 by the electric field formed between each rotating shell 6 and the workpiece 12. Thereafter, the object to be coated 12 is neutralized by the neutralizer
  • the use of two magnet rollers can enhance the coating ability.
  • Three or more magnet rollers may be used.
  • the magnet roller is disposed below the object 12 to be coated, and the powder coating 11 is applied to the back surface of the object 12 to be coated.
  • the powder coating 11 may be applied from the surface side of the object 12 as described in 1-3.
  • FIG. 6 shows a powder coating apparatus according to the fifth embodiment.
  • This device uses the implementation shown in Figure 1.
  • the powder coating apparatus instead of the sheet-shaped or flat-shaped workpiece 12 and the roller 13, the powder coating apparatus faces the opening 3 of the container 1 and is parallel to the rotating shell 6.
  • the apparatus further comprises a holding device 21 for holding a rod-shaped object 20 to be coated.
  • the holding device 21 can rotate the rod-shaped coating object 20 around its axis.
  • the object 20 is electrically grounded.
  • the powder coating 11 is applied while the rod-shaped object 20 is rotated around its axis by the holding device 21.
  • the powder coating 11 is separated from the carrier 10 by an electric field formed between the rotating shell 6 and the object 20, and is transferred and adheres to the surface of the object 20.
  • the powder coating 11 adheres uniformly over the entire outer peripheral surface of the rod-shaped object 20.
  • the object 20 is electrically grounded to form an electric field between the rotating shell 6 and the object 20 made of a conductor. It is useful.
  • FIG. 7 shows a powder coating apparatus according to the sixth embodiment.
  • This apparatus is a powder coating apparatus according to the fifth embodiment shown in FIG. 6, in which a high-voltage power supply 22 is electrically connected to an object 20 held and rotated by a holding device 21. It is. An electric potential is applied to the surface of the object 20 by the high-voltage power supply 22, and an electric field is formed between the rotary shell 6 and the powder coating 11 to transfer to the surface of the object 20.
  • an electric field is formed between the rotating shell 6 and the surface potential of the object 20 to be obtained by the high-voltage power supply 22. It is useful for a substrate 20 consisting of
  • FIG. 8 shows a powder coating apparatus according to the seventh embodiment.
  • This device is different from the powder coating device of the first embodiment shown in FIG. 1 in that instead of the sheet-shaped or plate-shaped coated object 12 and the roller 13, the device opposes the opening 3 of the container 1.
  • a conveyor 23 is disposed at a predetermined distance from the rotating shell 6, and a plurality of rod-shaped objects 20 are continuously applied by the conveyor 23 while being conveyed.
  • the bay 23 is electrically grounded.
  • FIG. 9 shows a powder coating apparatus according to the eighth embodiment.
  • This device is different from the powder coating device of the first embodiment shown in FIG. 1 in that instead of the sheet-shaped or plate-shaped coated object 12 and the roller 13, the device faces the opening 3 of the container 1.
  • a moving device 25 for stretching a wire-shaped coating object 24 in parallel with the rotating shell 6 and moving the coating object 24 in the longitudinal direction thereof is further provided.
  • the moving device 25 includes a delivery drum 26 around which the object 24 is wound, a winding drum 27 for winding the object 24, and a motor for rotating the winding drum 27. Evening has 28 and.
  • a pulley 29 for guiding the movement of the object 24 and a charger 30 for charging the object 24 are provided.
  • the take-up drum 27 When the take-up drum 27 is driven to rotate by the motor 28, the wire-shaped object 24 wound around the delivery drum 26 moves to the take-up drum 27. 2 4 is charged when passing through the charger 30, and further moves in parallel with the rotating shell 6 by the electric field formed between the rotating shell 6 and the object 24. 1 is transferred to and adheres to the surface of the object 24. Thereafter, the article to be coated 24 is taken up by a take-up drum 27. This makes it possible to apply the wire-shaped object 24 over its entire length.
  • the powder coating apparatus shown in FIG. 9 charges the object 24 with the charger 30 and is effective when the object 24 is made of an insulating material such as a dielectric. Also charge A static eliminator may be provided in place of the container 30 to transfer the powder coating 11 after the surface of the object 24 made of an insulating material is eliminated.
  • the charger 30 is preferably omitted, and the object 24 is preferably applied in an electrically grounded state.
  • the powder coating 11 is applied.
  • the present invention can be applied to various uses other than the following coating, for example.
  • a powdery lubricating material such as silica powder is applied to the outer peripheral surface of the rod-shaped object 20 in place of the powder coating 11 to be used in, for example, a copying machine.
  • Rod parts can be manufactured.
  • a powder is mixed with a carrier made of a magnetic substance, frictionally charged, and an electromagnetic brush is formed on a magnet roller by the carrier to which the powder is attached, thereby forming an electric field. Since the powder is transferred from the electromagnetic brush to the object to be coated separated by a predetermined distance from the magnet roller by using the magnet, the powder can be uniformly and efficiently applied to the surface of the object to be coated.

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)
  • Nozzles (AREA)
  • Electrostatic Spraying Apparatus (AREA)

Abstract

L'invention concerne une machine de revêtement pulvérulent dans lequel une brosse électromagnétique (14) est formée par des porteurs (10) tendus sur la surface d'une enveloppe tournante (6) et une peinture en poudre (11) chargée d'une polarité inversée adhère auxdits porteurs (10). Lorsque la brosse électromagnétique tourne (14) en même temps que l'enveloppe tournante (6) pour atteindre l'ouverture d'un récipient (1), la peinture en poudre (11) se détache des porteurs (10) sous l'effet d'un champ électrique formé entre l'enveloppe tournante (6) et un article (12) en cours de revêtement, est déplacée et adhère à la surface de l'article (12) situé à une distance D spécifiée de l'enveloppe tournante.
PCT/JP2003/004522 2002-04-23 2003-04-09 Machine de revetement pulverulent et procede d'enrobage Ceased WO2003090934A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003236026A AU2003236026A1 (en) 2002-04-23 2003-04-09 Powder coater and coating method

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2002120622 2002-04-23
JP2002-120622 2002-04-23
JP2002-320968 2002-11-05
JP2002320968A JP2004000891A (ja) 2002-04-23 2002-11-05 粉体塗布装置及び方法

Publications (1)

Publication Number Publication Date
WO2003090934A1 true WO2003090934A1 (fr) 2003-11-06

Family

ID=29272319

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2003/004522 Ceased WO2003090934A1 (fr) 2002-04-23 2003-04-09 Machine de revetement pulverulent et procede d'enrobage

Country Status (3)

Country Link
JP (1) JP2004000891A (fr)
AU (1) AU2003236026A1 (fr)
WO (1) WO2003090934A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006034830A1 (fr) * 2004-09-27 2006-04-06 Atotech Deutschland Gmbh Procede de preparation d'une feuille revetue de resine renforcee de fibres
CN117396280A (zh) * 2021-05-19 2024-01-12 Swimc有限公司 涂覆基材的方法和涂覆的基材

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0407312D0 (en) * 2004-03-31 2004-05-05 Phoqus Pharmaceuticals Ltd Method and apparatus for the application of powder material to substrates
DE102004046744B4 (de) * 2004-09-27 2007-05-24 Atotech Deutschland Gmbh Verfahren zur Übertragung von Pulvern und Pulverlacken auf Substrate und Verwendung zur Herstellung von Leiterplatten und Solarzellen
KR101221397B1 (ko) * 2012-04-18 2013-01-21 에스에이 주식회사 녹이 발생되는 현상을 방지한 도로의 가설시설물 및 그 제조방법
KR20220099551A (ko) 2019-11-14 2022-07-13 에스더블유아이엠씨 엘엘씨 금속 패키징 분말 코팅 조성물, 코팅된 금속 기재, 및 방법

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53163648U (fr) * 1977-05-31 1978-12-21
JPS55145566A (en) * 1979-04-27 1980-11-13 Origin Electric Co Ltd Powder coating method
JPS6012160A (ja) * 1983-07-01 1985-01-22 R H Service:Kk 静電塗装装置
JPS61171566U (fr) * 1985-04-10 1986-10-24
JPH0663462A (ja) * 1992-08-20 1994-03-08 Ricoh Co Ltd 静電粉体塗装装置及び方法
JPH09166923A (ja) * 1995-12-18 1997-06-24 Fujitsu Ltd 画像形成装置
JPH1184882A (ja) * 1997-09-09 1999-03-30 Canon Inc 画像形成装置
US20020031645A1 (en) * 2000-08-04 2002-03-14 Akihiro Sano Production method for monolayer powder film and production apparatus therefor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06180523A (ja) * 1992-12-14 1994-06-28 Konica Corp 画像形成装置
JPH10181070A (ja) * 1996-12-19 1998-07-07 Agfa Gevaert Nv ダイレクト静電印刷（ｄｅｐ）機関を使用する大型体裁印刷のための印刷機
JP3712923B2 (ja) * 2000-08-04 2005-11-02 株式会社巴川製紙所 粉体層積層体の製造方法及びその製造装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53163648U (fr) * 1977-05-31 1978-12-21
JPS55145566A (en) * 1979-04-27 1980-11-13 Origin Electric Co Ltd Powder coating method
JPS6012160A (ja) * 1983-07-01 1985-01-22 R H Service:Kk 静電塗装装置
JPS61171566U (fr) * 1985-04-10 1986-10-24
JPH0663462A (ja) * 1992-08-20 1994-03-08 Ricoh Co Ltd 静電粉体塗装装置及び方法
JPH09166923A (ja) * 1995-12-18 1997-06-24 Fujitsu Ltd 画像形成装置
JPH1184882A (ja) * 1997-09-09 1999-03-30 Canon Inc 画像形成装置
US20020031645A1 (en) * 2000-08-04 2002-03-14 Akihiro Sano Production method for monolayer powder film and production apparatus therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006034830A1 (fr) * 2004-09-27 2006-04-06 Atotech Deutschland Gmbh Procede de preparation d'une feuille revetue de resine renforcee de fibres
CN117396280A (zh) * 2021-05-19 2024-01-12 Swimc有限公司 涂覆基材的方法和涂覆的基材

Also Published As

Publication number Publication date
AU2003236026A1 (en) 2003-11-10
JP2004000891A (ja) 2004-01-08

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