EP1712296B1 - System und Verfahren zum Tauchbeschichten eines Gegenstandes - Google Patents

System und Verfahren zum Tauchbeschichten eines Gegenstandes Download PDF

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Publication number
EP1712296B1
EP1712296B1 EP05102865A EP05102865A EP1712296B1 EP 1712296 B1 EP1712296 B1 EP 1712296B1 EP 05102865 A EP05102865 A EP 05102865A EP 05102865 A EP05102865 A EP 05102865A EP 1712296 B1 EP1712296 B1 EP 1712296B1
Authority
EP
European Patent Office
Prior art keywords
component
tank
bushing
housing
dip coating
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.)
Expired - Fee Related
Application number
EP05102865A
Other languages
English (en)
French (fr)
Other versions
EP1712296A1 (de
Inventor
Hubertus Petrus Petronella Joseph Vervoort
Johannus Stephanus Theodorus Maria Gubbels
Germanus Nas
Petrus Theodorus De Saegher
Nahit Berk
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.)
Xerox Corp
Original Assignee
Xerox Corp
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 Xerox Corp filed Critical Xerox Corp
Priority to DE602005003554T priority Critical patent/DE602005003554T2/de
Priority to EP05102865A priority patent/EP1712296B1/de
Publication of EP1712296A1 publication Critical patent/EP1712296A1/de
Application granted granted Critical
Publication of EP1712296B1 publication Critical patent/EP1712296B1/de
Expired - Fee Related 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
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
    • B05C3/02—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
    • B05C3/09—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating separate articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/30—Cleaning by methods involving the use of tools by movement of cleaning members over a surface
    • B08B1/32—Cleaning by methods involving the use of tools by movement of cleaning members over a surface using rotary cleaning members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/021—Cleaning pipe ends or pipe fittings, e.g. before soldering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/023—Cleaning the external surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
    • B08B9/043—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes
    • B08B9/0436—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes provided with mechanical cleaning tools, e.g. scrapers, with or without additional fluid jets
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B13/00—Brushes with driven brush bodies or carriers
    • A46B13/001—Cylindrical or annular brush bodies
    • A46B13/005—Cylindrical or annular brush bodies made up of a series of longitudinal strips or segments

Definitions

  • the present invention is generally directed to the dip coating of a component with a material layer.
  • an image is first generated on a photosensitive member and then transferred from the photosensitive member to a sheet of paper or another material such as transparent plastic.
  • the photosensitive member can comprise a drum of an electrically conductive material coated with a photoconductor layer.
  • the electrically conductive material can comprise a metal, for example aluminum.
  • the photoconductor layer is electrically charged in the dark. Then, portions of the photoconductor layer are irradiated with light and the drum of electrically conductive material is grounded. The irradiated portions become electrically conductive and their charge flows off via the drum. Other portions of the photoconductor layer which were not irradiated with light remain electrically insulating. Hence, substantially no charge can flow off and the non-irradiated portions remain electrically charged.
  • toner particles are supplied to the drum.
  • the charge of the toner particles is opposite to that of the electrically charged portions of the photoconductor layer. Therefore, the toner particles are attracted by the non-irradiated portions of the photosensitive members and accumulate in these portions.
  • the photosensitive member is brought into contact with an electrically charged sheet of paper to transfer the toner to the paper.
  • the sheet of paper is then heated in order to fix the toner on the paper.
  • the drum of electrically conductive material is coated with the photoconductor.
  • the coating of the drum can comprise a dip coating.
  • a component to be coated is inserted into a bath comprising a coating material solved in a solvent.
  • a coating material solved in a solvent for example, in the manufacturing of the photosensitive member described above, the drum of electrically conductive material is inserted into a solution of the photoconductor. Then, the component is removed from the bath. After the removal, the component is wetted with the solution of the coating material. The solvent evaporates, leaving the coating material behind on the surface of the component.
  • either the component or a tank comprising the bath may be moved in a vertical direction. This can be done by means of a spindle known to persons skilled in the art.
  • portions of the photoconductor layer located close to the edges of the drum are removed in order to avoid an abrasion of such portions in the operation of the reproduction device. Abraded particles of the photoconductor layer might contaminate the reproduction device, thus adversely affecting the quality of reproduction and/or the functionality of the device.
  • At least one of the edges can be wiped by means of first brushes rotating around an inner circumference of the drum and second brushes rotating around an outer circumference of the drum.
  • the first and second brushes can be provided inside a recess of a support member and may be fixed to the support member.
  • the support member is rotated around an axis.
  • a solvent adapted to dissolve the photoconductor is supplied to the recess through the axis. The action of the brushes and the solvent together remove portions of the photoconductor layer located below a surface of the solvent.
  • a problem of the method of dip coating a component according to the state of the art is that vibrations generated in the vertical motion of the solvent tank or the component to be coated may be transferred to the bath and/or the component.
  • an unevenness of the motion of the component relative to the surface of the bath and/or wavelets on the surface of the bath may be generated, which may lead to an undesirable unevenness of the thickness of the coating.
  • circumferential non-uniformities which may reduce product yields by up to 45 % have been observed.
  • a problem of the method of wiping the edges of the drum according to the state of the art is that, since portions of the photoconductor layer below a level of the solvent in the recess of the support member are removed, a height of the portion of the photoconductor layer removed from the inside and the outside of the drum, respectively, is about equal. This, however, may be undesirable in some applications. Instead, it may be desirable to obtain a greater height of the removed portion of the photoconductor layer on the inside of the drum.
  • EP0458393A1 describes a dip coater for coating a drum.
  • a support is provided for supporting the drum stationary.
  • the velocity of the downward movement of the coating vessel is controlled by brake means.
  • GB419074A describes improvements in and relating to machines for coating articles by dipping.
  • Fig. 1 shows a schematic cross-sectional view of an apparatus 100 for dip coating a component 102.
  • the apparatus 100 comprises a tank 101 for a coating solution 104.
  • a spindle 111 is adapted to move the tank 101 in a vertical direction.
  • the spindle 111 comprises a shaft 105.
  • the shaft 105 is provided with a thread extending along a substantial portion of a length of the shaft 105.
  • a motor 112 is adapted to rotate the shaft 105 around a substantially vertical axis 123 of the shaft 113.
  • the spindle 111 further comprises a spindle head 106 provided with a spindle nut 113.
  • the shaft 105 extends through the spindle nut 113.
  • the spindle may comprise a frame adapted to prevent a rotation of the spindle head 106 around the axis 123 (not shown).
  • the spindle nut 113 moves in a vertical direction parallel to the axis 123. Depending on the direction of rotation of the shaft 105, the spindle nut 113 may be moved upward or downward. A speed of the motion of the spindle nut 113 can be controlled by varying a number of revolutions of the motor 112, a greater number of revolutions yielding a faster motion of the nut 113.
  • the spindle nut 113 can comprise a ballscrew nut.
  • a ballscrew nut comprises a plurality of balls running through the thread of the shaft 105 and a corresponding chamfer inside the nut 113.
  • a ballscrew nut provides a low frictional drag between the shaft 105 and the nut 113.
  • a ballscrew nut can be preloaded, which allows a significant reduction of a clearance of the nut 113. Thus, a greater precision of the motion of the spindle nut 113 along the shaft 105 can be achieved.
  • the apparatus 100 further comprises a damping element 117 provided between the spindle nut 106 and the tank 101.
  • the damping element 117 is adapted to absorb vibrations which are generated as the spindle nut 106 is moved by means of a rotation of the shaft 105.
  • the damping element 117 comprises a bushing 114.
  • the bushing 114 is supported by the spindle nut 106. To this end, the bushing 114 and the spindle nut 106 can be screwed together by means of a plurality of screws 107, 108.
  • the bushing 114 comprises a substantially cylindrical portion 116. A longitudinal axis of the cylindrical portion 116 can be substantially identical to the axis 123 of the shaft 105.
  • the cylindrical portion 116 has a radius r. In a particular embodiment of the present invention, the radius r has a value of about 89 mm.
  • the bushing 114 comprises a protrusion 115 running circularly around the cylindrical portion 116.
  • the protrusion 115 can be provided at a lower end of the bushing 116 and may comprise a substantially horizontal top surface.
  • the damping element 117 further comprises a housing 109.
  • the housing 109 comprises a cylindrical opening 118 having a radius R.
  • a longitudinal axis of the housing 109 can be substantially parallel to the axis 123 of the shaft 105.
  • the cylindrical portion 116 of the bushing 114 is provided inside the cylindrical opening 118 of the housing 109.
  • the radius R of the housing 109 can be greater than the radius r of the cylindrical portion 116 of the bushing 114. In one particular embodiment of the present invention, the radius R can have a value of about 92 mm.
  • a gap d can be provided between the cylindrical portion 116 and the inside wall of the cylindrical opening 118.
  • the housing 109 is connected with the tank 101 for the coating solution 104.
  • a damping ring 110 is provided between the protrusion 115 of the bushing 114 and the housing 109.
  • the damping ring 110 may comprise an elastic material configured to substantially absorb longitudinal vibrations of the bushing 116 in the vertical direction.
  • the damping ring 110 can comprise polyurethane having a Shore hardness of about 65° and a thickness of about 10 mm.
  • An inner diameter of the damping ring 110 can be about the same as the radius r of the cylindrical portion 116 of the bushing 114.
  • the damping ring 110 can cover the top surface of the protrusion 115 completely.
  • the weight of the tank 101 and the housing 109 rests on the damping ring 110.
  • the damping ring 110 is compressed by the weight force of the tank 101 and the housing 109.
  • the damping ring is additionally subjected to acceleration forces. Such forces may compress or relax the damping ring 110. Thereby, energy of the vibration is transferred to the damping ring 110 and dissipated therein.
  • the longitudinal vibrations are dampened.
  • a transfer of the longitudinal vibrations of the bushing 114 to the housing 109 and the tank 101 may be significantly reduced.
  • the damping element 117 can comprise a linear bearing.
  • the linear bearing can be provided in the form of a ring-shaped member 111.
  • the ring-shaped member 111 can be adapted such that a friction between a top surface of the ring-shaped member adjacent the housing 109 and the surface of the housing 109 is relatively low. Due to the low friction, the housing 109 and the bushing 114 may move relative to each other in at least one direction substantially perpendicular to the axis 123.
  • the top surface of the ring-shaped member is coated with Teflon.
  • the spindle nut 106 and the bushing 114 connected thereto exhibit transversal vibrations having at least one component in a direction perpendicular to the axis 123, the bushing 114 moves transverse to the axis 123. Since the linear bearing allows a motion of the bushing 114 and the housing 109 relative to each other, a transmission of the motion of the bushing 114 to the housing 109 can be significantly reduced. Therefore, a transmission of transverse vibrations of the spindle nut 106 to the housing 109 and the tank 101 connected thereto may be reduced significantly.
  • the tank 101 filled with the coating solution 104 is moved to a starting position wherein the spindle nut 106 is located in a lower portion of the shaft 105. This can be done by operating the motor 112 to rotate the shaft 105. Then, a component 102 to be coated is provided above the tank 101. To this end, the component 102 may be grasped by means of a picker arm 103 of a type known to persons skilled in the art and moved to a position above the tank 101.
  • the apparatus 100 may be used in the formation of a photosensitive member for a reproduction machine.
  • the component 102 can comprise a drum of an electrically conductive material, for example a metal such as aluminum.
  • the coating solution 104 can comprise a solution of a photoconductor material, for example an organic photoconductor such as an alkoxy/hydroxyl/halo gallium photogenerating component, wherein alkoxy can be, for example, from 1 to about 25 carbon atoms, from 2 to about 18 carbon atoms, from 2 to about 7 carbon atoms, and wherein halo comprises for example chlorine.
  • the photoconductor material can comprise (alkoxy/hydroxyl/chloro) gallium phthalocyanine pigment.
  • the coating solution may comprise a solvent such as n-Butyl Acetate or Tetrahydrofurane (THF).
  • the tank 101 is moved upward in the vertical direction by means of a rotation of the shaft 105. Due to the motion of the tank 101, the component 102 is dipped into the coating solution 104. The component 102 may totally be inserted into the coating solution 104. In other embodiments of the present invention, the insertion of the component 102 into the coating solution 104 may be only partial, leaving a portion of the component 102 adjacent an upper edge thereof outside the coating solution 104.
  • a direction of rotation of the shaft 105 is reversed in order to move the spindle nut 106 back to its starting position.
  • the tank is moved downward and the component 102 is pulled out of the coating solution 104.
  • the surface of the component 102 is wetted with the coating solution. Outside the tank 104, the solvent evaporates, leaving the dissolved coating material behind on the surface of the component 102.
  • a layer of the coating material is formed on the surface of the component 102.
  • the tank 101 need not be connected to the housing 109 of the damping element 117. In other embodiments of the present invention, the tank 101 is fixed and the component 102 is connected to the housing 109. In one embodiment of the present invention, a picker arm similar to the picker arm 103 configured to grab the component 102 is supported by the housing. In the operation of the apparatus 100, the component 102 is grabbed by the picker arm. Then, the picker arm is lowered towards the surface of the cleaning solution 104 by rotating the shaft 105. Subsequently, the direction of rotation of the shaft 105 is reversed to pull the component 102 out of the coating solution 104.
  • the present invention is not restricted to an apparatus for dip coating, as described above.
  • the present invention may be applied for moving an arbitrary member in a vertical direction.
  • the member may be connected to the housing 109 instead of the tank 101.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)

Claims (3)

  1. Eine Vorrichtung (100) zum Tauchbeschichten eines Gegenstandes (102), umfassend:
    einen Behälter (101) für eine Beschichtungslösung; und
    eine Spindel (111), die eingerichtet ist, den Gegenstand (102) oder den Behälter (101) in einer vertikalen Richtung zu bewegen, wobei der Gegenstand (102) oder der Behälter (101) mit einer Spindelmutter (113) der Spindel (111) verbunden sind;
    gekennzeichnet durch
    ein Dämpfungselement (117), das zwischen der Spindelmutter (113) und dem Gegenstand (112) oder dem Behälter (101) bereitgestellt wird.
  2. Eine Vorrichtung zur Tauchbeschichtung gemäß Anspruch 1, wobei das Dämpfungselement (117) umfasst:
    eine Buchse (114), die durch die Spindelmutter (113) gehalten wird, wobei die Buchse (114) einen zylindrischen Abschnitt (116) und einen Bund (115) umfasst, der kreisförmig um den zylindrischen Abschnitt (116) läuft;
    ein Gehäuse (109), das eine zylindrische Öffnung (118) umfasst, wobei der zylindrische Abschnitt (116) der Buchse (114) innerhalb der zylindrischen Öffnung (118) bereitgestellt wird;
    einen Dämpfungsring (110), der ein elastisches Material umfasst und zwischen dem Bund (115) und dem Gehäuse (109) bereitgestellt wird.
  3. Eine Vorrichtung zur Tauchbeschichtung gemäß Anspruch 2, wobei das Dämpfungselement weiterhin ein lineares Lager (111) umfasst, das eine Bewegung des Gehäuses (109) relativ zu der Buchse (114) in mindestens einer Richtung im Wesentlichen senkrecht zu einer längslaufenden Achse des zylindrischen Abschnitts (116) der Buchse (114) ermöglicht.
EP05102865A 2005-04-12 2005-04-12 System und Verfahren zum Tauchbeschichten eines Gegenstandes Expired - Fee Related EP1712296B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE602005003554T DE602005003554T2 (de) 2005-04-12 2005-04-12 System und Verfahren zum Tauchbeschichten eines Gegenstandes
EP05102865A EP1712296B1 (de) 2005-04-12 2005-04-12 System und Verfahren zum Tauchbeschichten eines Gegenstandes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05102865A EP1712296B1 (de) 2005-04-12 2005-04-12 System und Verfahren zum Tauchbeschichten eines Gegenstandes

Publications (2)

Publication Number Publication Date
EP1712296A1 EP1712296A1 (de) 2006-10-18
EP1712296B1 true EP1712296B1 (de) 2007-11-28

Family

ID=34939238

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05102865A Expired - Fee Related EP1712296B1 (de) 2005-04-12 2005-04-12 System und Verfahren zum Tauchbeschichten eines Gegenstandes

Country Status (2)

Country Link
EP (1) EP1712296B1 (de)
DE (1) DE602005003554T2 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2958081B1 (fr) 2010-03-23 2012-04-27 Polyrise Dispositifs photovoltaiques comportant une couche anti-reflet a base d'objets disperses presentant des domaines d'indices de refraction distincts
CN112958371A (zh) * 2021-01-29 2021-06-15 保定鼎泰起重机械制造有限公司 一种五金机械加工用避免生锈的智能制造设备

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB419074A (en) * 1933-05-11 1934-11-06 William Denis Walker Sinclair Improvements in and relating to machines for coating articles by dipping
GB438602A (en) * 1933-05-22 1935-11-18 Hobart Mfg Co Improvements in or relating to washing machines for tumblers and the like
US5185187A (en) * 1987-06-02 1993-02-09 Fuji Xerox Co., Ltd. Method and apparatus for dip coating a hollow cylindrical body
DE69124544T2 (de) * 1990-05-22 1997-09-11 Agfa Gevaert Nv Tauchbeschichtungsmaschine
US6964077B2 (en) * 2003-04-14 2005-11-15 Red Cedar Plastics, Llc Pipe cleaning and deburring tool

Also Published As

Publication number Publication date
DE602005003554T2 (de) 2008-03-13
DE602005003554D1 (de) 2008-01-10
EP1712296A1 (de) 2006-10-18

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