EP0550000B1 - Vorrichtung zum elektrophoretischen Tauchlackieren - Google Patents

Vorrichtung zum elektrophoretischen Tauchlackieren Download PDF

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Publication number
EP0550000B1
EP0550000B1 EP92121813A EP92121813A EP0550000B1 EP 0550000 B1 EP0550000 B1 EP 0550000B1 EP 92121813 A EP92121813 A EP 92121813A EP 92121813 A EP92121813 A EP 92121813A EP 0550000 B1 EP0550000 B1 EP 0550000B1
Authority
EP
European Patent Office
Prior art keywords
lamellae
conveyor belt
chains
guided
another
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 - Lifetime
Application number
EP92121813A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0550000A1 (de
Inventor
Michael Hentschl
Gerhard Brendel
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.)
Nuetro Maschinen- und Anlagenbau & Co KG GmbH
Nutro Maschinen und Anlagenbau GmbH and Co KG
Original Assignee
Nuetro Maschinen- und Anlagenbau & Co KG GmbH
Nutro Maschinen und Anlagenbau GmbH and Co KG
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 Nuetro Maschinen- und Anlagenbau & Co KG GmbH, Nutro Maschinen und Anlagenbau GmbH and Co KG filed Critical Nuetro Maschinen- und Anlagenbau & Co KG GmbH
Publication of EP0550000A1 publication Critical patent/EP0550000A1/de
Application granted granted Critical
Publication of EP0550000B1 publication Critical patent/EP0550000B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D13/00—Electrophoretic coating characterised by the process
    • C25D13/22—Servicing or operating apparatus or multistep processes

Definitions

  • the invention relates to a device for electrophoretic dip coating with an endless conveyor belt which is guided through a bath container and is connected as an electrode.
  • German Offenlegungsschrift 38 43 544 In order to avoid incomplete painting of small parts such as screws, nuts, hinges and fittings, it is known from this German laid-open publication 38 43 544 for electrophoretic continuous immersion painting of small parts and bulk goods that the paint is passed through the paint bath on a conveyor connected as an electrode lead, which has an electrically insulating coating with the exception of the required contact surfaces.
  • the contact surfaces of the paint are changed at least once by placing the paint on its base, ie the conveyor belt, in a different position. After such a change in position, the original contact points between the item to be painted and the conveyor belt and among themselves a painting are accessible.
  • the change in position of the paint on the conveyor belt can be stationary in the known continuous immersion painting system or movable baffles, by moving parts of an articulated conveyor belt against each other or by jarring the conveyor belt.
  • the conveyor belt which is made of stainless steel, for example, as a spiral wire belt with a round or triangular profile of the spirals, is provided with carriers when conveying rotationally symmetrical parts.
  • a continuous painting which is behind the immersion bath among other things.
  • a baking oven connects, through which the items to be painted are conveyed on a conveyor belt that is thermally stable with respect to the baking temperatures.
  • the known continuous dip coating system is located between the conveyor belt passing through the immersion bath and a slide loaded with a film of water on the conveyor belt of the washing station.
  • the invention has for its object to enable a complete electrophoretic dip painting with reduced mechanical engineering effort and possibly also with a continuous painting system a gentle transfer of the paint from one conveyor belt to another.
  • a slat conveyor belt several advantages can be achieved simultaneously. In this way, a complete, uniform coating or painting is achieved since the contact points with the teeth of the Allow the surface of the slat conveyor belt to be changed, namely advantageously in that the conveyor belt is guided through a bath container with a deflection approximately in the middle. The total contact area is reduced and the quality of the painting is improved.
  • the curve radius of the deflection can be adapted to each workpiece contour by changing the length of the slat belt, for example by means of clamping units, in such a way that there is an optimal rearrangement of the parts to be painted.
  • the lamella construction allows the conveyor belt assigned to the bath container and a subsequent belt to take over the parts to be provided with lamellas which interlock with one another in the transfer area lying between the chain wheels of the two conveyor belts. No height difference then needs to be overcome during the transfer, which enables extremely gentle transfer of the workpieces.
  • similar conveyor belts can be used for a continuous continuous immersion painting system.
  • the comb-like engagement in the transfer area between the adjacent sprockets of successive conveyor belts results, for example, from the fact that the distance between corresponds to the longitudinal axes of adjacent cross bars of the single or multiple chain pitch and the middle of three slats is offset from the other two slats.
  • the lamellae then have free ends which are separated from each other by a gap due to the geometry which protrudes from the cross bars during the rolling on the chain wheels, that is to say in the turning points.
  • the cantilevered ends of the correspondingly arranged lamellae of the following conveyor belt engage in the gaps between the free ends, so that there is a continuous, comb-like intermeshing and transfer of the parts from one to the other conveyor belt without falling paths.
  • the tooth flanks facing one another should form a right angle;
  • the angular dimension can be adjusted accordingly depending on the most favorable center of gravity when taking over. This effect can also be achieved if radii or curves are provided between the tooth flanks.
  • the teeth of the slat conveyor belt ensure that they rest securely on the conveyor belt without any further measures.
  • the front rod receiving bore of the slats is advantageously designed as an elongated hole, the freedom of movement required for the slats in the reversal points can be achieved with a crossbar division that is larger than the chain pitch.
  • spacer sleeves arranged on the crossbars between the lamellae which should preferably have the same outer diameter as the bushes of the drive chains, there is a lateral support of the slats, which therefore do not tip over due to the workpiece loading.
  • the spacer bushes offer favorable points of attack for - especially useful with large belt widths - axial supports for turning and reversing guides.
  • a feed (feed table, feed conveyor) 2, a bath container 3 with its associated conveyor belt 4 and a subsequent conveyor belt 6, which is guided through a baking oven 5, are shown in FIG. 1 from a continuous continuous immersion painting system 1.
  • the feed conveyor 2 brings the schematically indicated parts 7 in a single-layer to the conveyor belt 4, which passes through the painting bath 8 in the bath container 3.
  • the front and rear drive rollers which are designed as chain wheels 9 and 11, are connected synchronously.
  • the conveyor belts 4 and 6 are designed in lamella construction; they consist of lamellae 12 which are arranged on cross bars 14 connected to drive chains 13 and are separated from one another by spacer sleeves 20 (cf. FIG. 3).
  • the outer diameter of the spacer sleeves 20 is equal to the outer diameter of the bushes of the drive chains 13.
  • Each lamella 12 according to the exemplary embodiment has six teeth 15, whose pitch T calculated from tip to tip corresponds to the pitch of the drive chains 13.
  • the teeth 15 are of different heights, as can be seen from the height difference 16 shown in FIG. 2, and the tooth flanks 17 facing one another are adjacent Teeth form a right angle 18.
  • the slats 12 have, since the crossbar division is larger than the chain pitch, namely corresponds to the 3-fold chain pitch, in addition to a cylindrical rod slot 19 and 21 designed as an elongated hole.
  • the lamellae 12 are arranged offset such that the middle one of three lamellae 12a is offset in the transport direction 22 with respect to the other two lamellae 12b and 12c. While the distance between the longitudinal axes 23 of adjacent cross bars 14 corresponds to the triple chain pitch T, the offset dimension of the respective middle slat 12a is only 2.5 times the chain pitch T.
  • the slats 12b and 12c end - in the direction of transport 22 seen - thus in front of a cross bar 14, and the middle lamellae 12a project with their free ends beyond the cross bar 14 (cf. FIG. 3).
  • a deflection 27 indicated schematically in FIG. 1 is located approximately in the middle of the bath container.
  • the conveyor belt 4 guided on both sides by the drive chains 13 runs for this purpose, first inclined into the bath container 3, namely until it has reached the deflection 27 (turning point); from there it then rises at an angle corresponding to the previous inclination, so that it finally exits the paint bath and reaches the transfer area Y.
  • the teeth of the inclined and the inclined slats 12 of the conveyor belt 4 approach each other, which is synonymous with a rearrangement of the parts 7, so that the previous contact points can then be washed freely and completely by the paint.
  • the deflection radius which is set in the deflection 27 on account of the inclinations of the incoming and outgoing conveyor belt 4 can be changed by tensioning or relaxing the belt, so that there is an optimal rearrangement of the parts or a change in the contact points.
  • the conveyor belt 4 consisting of slats 12 thus not only enables an automatically changing position of the paint on the conveyor belt and thus free access to the entire surface while passing through the bath container 3, but also in combination with a similar, ie also consisting of slats 12 , subsequent conveyor belt 6 a gentle transfer from one surface to the other, which does not damage the surface completely wetted by the paint Conveyor belt.
  • the conveyor belt can also consist of individual slats 29 which are connected to one another in an articulated manner to form single-row chains 28. 6, two lamellae 29 are connected to each other by means of a rivet or metal bolt 30. Several such slat chains arranged parallel to one another then form a conveyor belt with a relatively small mass and a large opening cross section.
  • stabilizing plates 31 can also be arranged parallel to individual plates 29 of a plate chain 28, as shown in the drawing in FIG. 7. Expediently, then - as shown in FIG. 7 - single lamella 29 and lamella pairs 29, 31 alternate.
  • Roller-shaped chain wheels 32 which are provided with peripheral slots 33 for guiding the plate chains 28 and rivet head receptacles 34, are used for guiding and deflecting the plate chains 28.
  • These chain wheels can be formed in one piece or consist of individual disks which are arranged next to one another and form circumferential slots 33.
  • the lamella chains 28 can also be guided in U-profiles 35, which in turn consist of two lamellae 37, 38 each connected by rivets 36 (FIG. 9).
  • the U-shaped guides 35 can also consist of a plurality of one-piece U-profiles 39 arranged next to one another (FIG. 10).
  • a particularly secure guidance is obtained if the lamella chains 28 in box-shaped guides 40 with an upper slot 41 and optionally additionally a lower slot 42 are guided.
  • Such guides can each consist of two U-profiles 43, 44.
  • conveyor belts consisting of several parallel slat chains results from the fact that the individual slat chains of two adjacent conveyor belts intermesh like a comb in the area of their abutment and form a particularly large overload zone due to the absence of cross bars connecting the slats. This allows a smooth transition of the goods to be transported or painted.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Coating Apparatus (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chain Conveyers (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Photographic Developing Apparatuses (AREA)
EP92121813A 1991-12-24 1992-12-22 Vorrichtung zum elektrophoretischen Tauchlackieren Expired - Lifetime EP0550000B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4142997 1991-12-24
DE4142997A DE4142997C1 (uk) 1991-12-24 1991-12-24

Publications (2)

Publication Number Publication Date
EP0550000A1 EP0550000A1 (de) 1993-07-07
EP0550000B1 true EP0550000B1 (de) 1996-04-17

Family

ID=6448147

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92121813A Expired - Lifetime EP0550000B1 (de) 1991-12-24 1992-12-22 Vorrichtung zum elektrophoretischen Tauchlackieren

Country Status (9)

Country Link
EP (1) EP0550000B1 (uk)
AT (1) ATE136952T1 (uk)
CZ (1) CZ293075B6 (uk)
DE (3) DE9116171U1 (uk)
DK (1) DK0550000T3 (uk)
ES (1) ES2086058T3 (uk)
HU (1) HU219274B (uk)
PL (1) PL169788B1 (uk)
SK (1) SK278817B6 (uk)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7767070B2 (en) 2004-08-13 2010-08-03 Ppg Industries Ohio, Inc. Processes for coating of objects

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4339773C2 (de) * 1993-11-23 2001-12-13 Nuetro Maschinen & Anlagen Verfahren und Vorrichtung zum Tauchlackieren
DE4428789B4 (de) * 1993-11-23 2007-07-26 Nütro Maschinen- und Anlagenbau GmbH & Co. KG Vorrichtung zum Tauchlackieren
DE4341188C2 (de) * 1993-12-03 1998-07-09 Nuetro Maschinen & Anlagen Vorrichtung und Verfahren zum Elektrotauchlackieren
DE19511900C2 (de) * 1995-03-31 1997-04-24 Hentschel Michael Dipl Ing Fh Vorrichtung zum Elektro-Tauchlackieren
DE19713203C1 (de) * 1997-03-28 1998-11-12 Nuetro Maschinen & Anlagen Vorrichtung und Verfahren zum Oberflächenbehandeln durch Tauchen
DE19834245B4 (de) * 1998-07-29 2007-05-03 Nütro Maschinen- und Anlagenbau GmbH & Co. KG Vorrichtung zum elektrolytischen Beschichten
CN100494020C (zh) * 2006-03-07 2009-06-03 江苏天奇物流系统工程股份有限公司 旋浸式输送机系统
CN109137019B (zh) * 2018-08-14 2019-12-31 歌尔股份有限公司 一种连续镀化方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR400600A (fr) * 1909-03-02 1909-07-31 Meaker Company Appareil galvanoplastique
US3826355A (en) * 1971-03-03 1974-07-30 Buehler Corp Continuous plating system
DE3843544A1 (de) * 1988-12-23 1990-06-28 Sep Tech Studien Verfahren und vorrichtung zur elektrophoretischen tauchlackierung von kleinteilen und schuettguetern

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7767070B2 (en) 2004-08-13 2010-08-03 Ppg Industries Ohio, Inc. Processes for coating of objects

Also Published As

Publication number Publication date
SK373792A3 (en) 1995-03-08
DK0550000T3 (da) 1996-05-13
EP0550000A1 (de) 1993-07-07
CZ373792A3 (en) 1993-08-11
DE9116171U1 (de) 1992-04-02
CZ293075B6 (cs) 2004-02-18
DE59206046D1 (de) 1996-05-23
DE4142997C1 (uk) 1993-01-28
HUH3785A (en) 1996-07-29
PL169788B1 (pl) 1996-08-30
SK278817B6 (sk) 1998-03-04
PL297096A1 (en) 1993-07-12
ES2086058T3 (es) 1996-06-16
HU219274B (en) 2001-03-28
HU9204103D0 (en) 1993-04-28
ATE136952T1 (de) 1996-05-15

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