DE3735798A1 - Method and device for the electrostatic coating of electrical printed circuit boards - Google Patents
Method and device for the electrostatic coating of electrical printed circuit boardsInfo
- Publication number
- DE3735798A1 DE3735798A1 DE19873735798 DE3735798A DE3735798A1 DE 3735798 A1 DE3735798 A1 DE 3735798A1 DE 19873735798 DE19873735798 DE 19873735798 DE 3735798 A DE3735798 A DE 3735798A DE 3735798 A1 DE3735798 A1 DE 3735798A1
- Authority
- DE
- Germany
- Prior art keywords
- circuit boards
- station
- painting
- printed circuit
- chamber
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000009503 electrostatic coating Methods 0.000 title abstract description 4
- 238000005476 soldering Methods 0.000 claims abstract 2
- 238000010422 painting Methods 0.000 claims description 29
- 239000003973 paint Substances 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 14
- 239000000428 dust Substances 0.000 claims description 6
- 150000003071 polychlorinated biphenyls Chemical class 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 abstract 1
- 239000007921 spray Substances 0.000 description 9
- 239000004922 lacquer Substances 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 239000004020 conductor Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000006223 plastic coating Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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
- B05B5/08—Plant for applying liquids or other fluent materials to objects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/0091—Apparatus for coating printed circuits using liquid non-metallic coating compositions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2252/00—Sheets
- B05D2252/04—Sheets of definite length in a continuous process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2252/00—Sheets
- B05D2252/10—Applying the material on both sides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/10—Using electric, magnetic and electromagnetic fields; Using laser light
- H05K2203/105—Using an electrical field; Special methods of applying an electric potential
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/13—Moulding and encapsulation; Deposition techniques; Protective layers
- H05K2203/1333—Deposition techniques, e.g. coating
- H05K2203/1366—Spraying coating
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/15—Position of the PCB during processing
- H05K2203/1518—Vertically held PCB
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/15—Position of the PCB during processing
- H05K2203/1563—Reversing the PCB
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/22—Secondary treatment of printed circuits
- H05K3/227—Drying of printed circuits
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Non-Metallic Protective Coatings For Printed Circuits (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum elektrostatischen Lackieren von elektrischen Leiterplatten mit durchgehenden Bohrungen als Lötstellen für Anschluß- oder Verbindungsleitungen.The invention relates to a method and a device for electrostatic painting of electrical Printed circuit boards with through holes as solder joints for connecting or connecting lines.
Elektrische Leiterplatten bestehen aus einer Kunststoffplatte, z.B. einer Epoxydharzplatte, die beidseitig kupferkaschiert ist und die nach dem Ätzen die Leiterbahnen und Anschlußstellen trägt. Zum Isolieren der elektrischen Leiterplatten werden nach verschiedenen bekannten Verfahren dünne Kunststoffüberzüge aufgetragen. Zu den bekannten Lackauftragsverfahren gehört das Aufstreichen mittels eines Rakels, Tauchen, Spritzen und auch das elektrostatische Beschichten. Das elektrostatische Lackieren von elektrischen Leiterplatten ist in der DE-OS 17 72 976 ausführlich geschildert. Zwischen einem Sprühkopf und der zu lackierenden Leiterplatte wird Hochspannung erzeugt, wobei die Leiterplatte an Erdpotential liegt. Aufgrund des hohen elektrischen Potentials zwischen dem rotierenden Sprühkopf und der Leiterplatte werden Lacktröpfchen auf die dem Sprühkopf zugewandte Oberfläche der Leiterplatte befördert, die auf der Oberfläche der Leiterplatte zu einem Lackfilm verschmelzen. Electrical circuit boards consist of one Plastic sheet, e.g. an epoxy resin plate, the is copper-clad on both sides and that after the etching Conductor tracks and connection points carries. To isolate the electrical circuit boards are made according to different known methods applied thin plastic coatings. This is part of the well-known paint application process Spreading with a squeegee, dipping, spraying and also electrostatic coating. The electrostatic Painting of electrical circuit boards is in the DE-OS 17 72 976 described in detail. Between one Spray head and the circuit board to be painted High voltage is generated, the circuit board at ground potential lies. Due to the high electrical potential between the rotating spray head and the circuit board Paint droplets on the surface facing the spray head the printed circuit board which is on the surface of the Merge the circuit board into a lacquer film.
Im praktischen Betrieb solcher elektrostatischen Lackbeschichtungsanlagen wurde so verfahren, daß die Leiterplatten auf Papier flach liegend horizontal an der Lackierstation vorbei bewegt wurden. Nach dem Trocknen der Lackschicht wurde die Leiterplatte gewendet und ihre Großfläche in gleicher Weise beschichtet, die dann ebenfalls getrocknet werden mußte. Nachteilig bei dieser Verfahrensweise ist, daß das zweimalige Lackieren und zweimalige Trocknen zeit- und kostenaufwendig ist, aber auch, daß die zuerst aufgebrachte Lackschicht zweimal getrocknet wird, nämlich einmal wenn sie selbst getrocknet wird und zum anderen wenn die Lackschicht der gegenüberliegenden Fläche getrocknet wird. Dadurch wird die Konsistenz der beiden Lackschichten auf den beiden Flächen der Leiterplatten unterschiedlich. Es kann sogar passieren, daß die zuerst aufgebrachte Lackschicht beim Trocknen der zweiten Lackschicht beschädigt und damit die Leiterplatte unbrauchbar wird.In the practical operation of such electrostatic Paint coating systems were operated so that the PCBs on paper lying flat horizontally on the Painting station were moved past. After drying the The printed circuit board and theirs were coated Large area coated in the same way, which then also had to be dried. A disadvantage of this The procedure is that painting twice and drying twice is time consuming and costly, however also that the first coat of paint applied twice is dried, namely once when it is dried itself and on the other hand if the lacquer layer of the opposite surface is dried. This will make the Consistency of the two layers of paint on the two surfaces of the circuit boards different. It can even happen that the layer of lacquer applied first when drying the second layer of lacquer damaged and thus the circuit board becomes unusable.
Aus der DE-OS 33 04 648 ist es beim elektrostatischen Aufbringen eines Lackfilms auf Magnetbänder bekannt, gleichzeitig auf beide Flächen des Bandes die Lackdispersion elektrostatisch aufzubringen und die beiden Lackschichten anschließend gleichzeitig zu trocknen. Dieses bekannte Verfahren mit gegenüberliegend angebrachten Sprühdüsen ist aber nur anwendbar für das Beschichten durchgehender Bänder, denn beim Beschichten von in Abständen an den Sprühdüsen vorbeigeführten Teilen, wie Leiterplatten, würden in den Abständen zwischen aufeinanderfolgenden zu beschichtenden Teilen die Sprühströme aus den gegenüberliegenden Düsen aufeinanderprallen und unkontrolliert verwirbeln, so daß aufgrund dieser Störungen eine definierte Schichtdicke nicht eingehalten werden kann. Außerdem erfordert eine Anordnung der Sprühdüsen auf beiden Seiten des Bandes, wie sie bei dem Verfahren gemäß der DE-OS 33 04 648 vorgesehen ist, verhältnismäßig viel Raum.From DE-OS 33 04 648 it is electrostatic Applying a lacquer film to magnetic tapes known on both surfaces of the belt at the same time Apply the paint dispersion electrostatically and the two Then dry paint coats at the same time. This known methods with oppositely attached Spray nozzles can only be used for coating continuous tapes, because when coating in Distances passed by the spray nozzles, such as Printed circuit boards, would be in the intervals between successive parts to be coated Spray flows from the opposite nozzles collide and swirl uncontrollably, so that a defined layer thickness due to these disturbances can be observed. It also requires an arrangement the spray nozzles on both sides of the belt, as in the case of the The method according to DE-OS 33 04 648 is provided, relatively much space.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zu schaffen, das bzw. die ein rasches, qualitativ einwandfreies und kostengünstiges Lackieren ermöglicht. Die entsprechende Vorrichtung soll mit geringem Platzbedarf auskommen.The invention has for its object a method and to create a device that provides a quick, qualitatively perfect and inexpensive painting enables. The corresponding device should be low Space requirements.
Zur Lösung dieser Aufgabe wird erfindungsgemäß vorgeschlagen, daß die hängend transportierten Leiterplatten auf einer Seite lackiert, dann gewendet, auf der anderen Seite lackiert und unmittelbar danach während des Weitertransports getrocknet werden. Der Unterschied zu der bisher bekannten Verfahrensweise besteht demgemäß darin, daß die Leiterplatten unmittelbar aufeinanderfolgend beidseitig lackiert werden, wobei zwischen dem Auftragen des Lacks auf der einen und auf der anderen Fläche die Leiterplatten gewendet werden, während sie von der ersten Lackierstation zur Wendestation und von dieser zur zweiten Lackierstation und den Trocknungsofen mittels einer Transporteinrichtung kontinuierlich weiterbewegt werden.To solve this problem, the invention suggested that the hanging transported circuit boards painted on one side, then turned, on the other Painted side and immediately afterwards during the Further transport to be dried. The difference to that Previously known procedure accordingly consists in that the printed circuit boards in succession on both sides be painted, being between the application of the paint the one and on the other surface the circuit boards be turned while being from the first painting station to the turning station and from this to the second painting station and the drying oven by means of a transport device be continuously moved on.
Das erfindungsgemäße Verfahren vereint den Vorteil des schnellen kostengünstigen Beschichtens mit dem einer gleichmäßig guten Qualität der Lackschichten auf beiden Seiten der Leiterplatte. Das Wenden der Leiterplatten vor dem Auftragen der zweiten Lackschicht ermöglicht auch eine raumsparende Anordnung der Lackierstationen auf derselben Seite der Transporteinrichtung, so daß nur eine verhältnismäßig klein dimensionierte Kammer für die Aufnahme der Lackierstationen der Wendestation und des Trocknungsofens benötigt wird, die deshalb in Containern transportfähig gestaltet werden kann.The inventive method combines the advantage of fast, inexpensive coating with one equally good quality of the paint layers on both Sides of the circuit board. Turning the circuit boards forward the application of the second layer of lacquer also enables space-saving arrangement of the painting stations on the same Side of the transport device, so that only one relatively small chamber for the recording the painting stations of the turning station and the Drying oven is needed, which is why in containers can be made transportable.
Wenn die hängenden Leiterplatten während des Lackierens und Trocknens mittels Endlosband oder -kette transportiert werden, ist die Bedienung beim Aufhängen der zu beschichtenden Leiterplatten und Abnehmen der beschichteten Leiterplatten von der Transporteinrichtung von einer Steile aus möglich.If the hanging circuit boards during painting and Drying transported by endless belt or chain is the operation when hanging the coating printed circuit boards and removing the coated PCBs of the transport device from a steep possible.
Die erfindungsgemäß vorgesehene Vorrichtung zum elektrostatischen Lackieren von elektrischen Leiterplatten mit einer Lackierstation, einem Trocknungsofen innerhalb einer staubarmen Kammer und einer an der Lackierstation vorbei und durch den Ofen sowie aus der Kammer herausführenden Transporteinrichtung ist gekennzeichnet durch eine erste Lackierstation, eine in Transportrichtung darauffolgende Wendestation, gefolgt von einer zweiten Lackierstation unmittelbar vor der Eintrittsöffnung des in Transportrichtung folgenden Trocknungsofens. Die bevorzugt vorgesehene in einer Horizontalebene umlaufende Endloskette kann in dem durch die Kettengliedlänge vorgegebenen Rastermaß mit Stäben bestückt werden, die durch die als Hohlniete ausgebildeten Kettengelenke gesteckt werden. An den Stäben sind unten Haken zum Anhängen der Leiterplatten in vertikaler Erstreckung vorgesehen. Der Kopf der Stäbe ist wie die Endloskette in Schienen geführt und wird an der Wendestation durch geeignete Mittel um 180° gedreht. Dazu kann der Kopf der Stäbe in einer Ausführung z.B. als Ritzel ausgebildet sein, welches an der Wendestation mit einer Zahnstange in Eingriff gelangt, die das Ritzel um eine halbe Umdrehung mitnimmt. The inventive device for electrostatic painting of electrical circuit boards with a painting station, a drying oven inside a low-dust chamber and one at the painting station over and through the oven and out of the chamber leading transport device is marked through a first painting station, one in the direction of transport subsequent turning station, followed by a second Painting station immediately before the entrance opening of the in the transport direction of the following drying oven. The preferably provided revolving in a horizontal plane Endless chain can in that by the chain link length given grid dimensions can be equipped with rods that through the chain links designed as hollow rivets be put. There are hooks on the bottom of the bars Attach the circuit boards in a vertical extension intended. The head of the bars is like the endless chain in Guided rails and is carried out at the turning station suitable means rotated by 180 °. The head of the Rods in one version e.g. be designed as a pinion, which engages with a rack at the turning station reaches, which takes the pinion by half a turn.
Der Kopf der Stäbe kann aber auch als Kreuzkopf ausgebildet sein, wobei in dem Transportweg des Stabkopfes Anschläge vorgesehen sind, die ein Drehen des Kopfes und des Stabes sowie der daran hängenden Leiterplatte um 180° bewirken.The head of the bars can also be designed as a cross head be, with stops in the transport path of the rod head are provided, which is a rotation of the head and the rod and the attached circuit board by 180 °.
Anhand des in der Zeichnung dargestellten Ausführungsbeispiels wird die Erfindung näher erläutert.Using the shown in the drawing The embodiment is explained in more detail.
Fig. 1 zeigt die Vorrichtung in Draufsicht und Fig. 1 shows the device in plan view and
Fig. 2 in einer Seitenansicht. Fig. 2 in a side view.
Eine staubarme Kammer 1 enthält eine erste Lackierstation 2 zum elektrostatischen Lackieren der einen Seite von Leiterplatten 3, die an einer Endloskette 4 vertikal hängend mit gleichbleibender Geschwindigkeit durch die Kammer 1 bewegt werden.A low-dust chamber 1 contains a first painting station 2 for electrostatically painting one side of printed circuit boards 3 , which are moved vertically hanging on an endless chain 4 through the chamber 1 at a constant speed.
Nachdem die in der Sprühstellung befindliche Leiterplatte 3 den Sprühkegel 5 der ersten Lackierstation 2 verlassen hat, gelangt sie zu einer Wendestation 6, an der die Leiterplatte 3 gewendet, d.h. um eine vertikale Achse um 180° gedreht wird. Anschließend gelangt die gewendete Leiterplatte 3 in den Einflußbereich einer zweiten Lackierstation 7, durch welche die andere Seite der Leiterplatte mit einem Lackfilm beschichtet wird. Hinter jeder Lackierstation 2, 7 ist eine Absaugung 8 angeordnet, die mit einem Filtertuch überspannt ist, an dem Lackreste hängen bleiben. After the printed circuit board 3 in the spray position has left the spray cone 5 of the first painting station 2 , it arrives at a turning station 6 , at which the printed circuit board 3 is turned, that is to say rotated by 180 ° about a vertical axis. Then the flipped circuit board 3 reaches the area of influence of a second painting station 7 , through which the other side of the circuit board is coated with a paint film. A suction device 8 is arranged behind each painting station 2 , 7 and is covered with a filter cloth on which paint residues remain.
Nach dem Verlassen der zweiten Lackierstation 7 gelangt die nun auf beiden Seiten elektrostatisch mit einem Lackfilm beschichtete Leiterplatte 3 in den Trocknungsofen 9, der die Rückwand und die der Lackierstationen 2, 7 gegenüberliegenden Seite der Kammer 1 einnimmt. In dem Trocknungsofen 9 werden beide Lackschichten auf den Flächen der Leiterplatten 3 gleichzeitig getrocknet.After leaving the second painting station 7 , the circuit board 3 now electrostatically coated with a paint film on both sides enters the drying oven 9 , which takes up the rear wall and the side of the chamber 1 opposite the painting stations 2 , 7 . In the drying oven 9 , both layers of paint on the surfaces of the circuit boards 3 are dried simultaneously.
Nach dem Verlassen des Trocknungsofens 9 gelangen die immer noch an der Endloskette 4 hängenden Leiterplatten 3 an die Stelle 10 außerhalb der Kammer 1, von der aus die Bedienung erfolgen kann, d.h. an dieser Stelle können beschichtete Leiterplatten 3 von der Transporteinrichtung abgenommen und neue zu beschichtende Leiterplatten 3 zum Transport durch die Kammer 1 angehängt werden.After leaving the drying oven 9 , the circuit boards 3 still hanging on the endless chain 4 arrive at the point 10 outside the chamber 1 from which the operation can take place, ie at this point coated circuit boards 3 can be removed from the transport device and new ones to be coated Printed circuit boards 3 are attached for transport through the chamber 1 .
Durch eine Tür 11 ist die Kammer 1 nach außen staubarm abgeschlossen und das Innere der Kammer 1 zugänglich.The chamber 1 is closed to the outside with little dust by a door 11 and the interior of the chamber 1 is accessible.
Die Leiterplatten 3 hängen, wie am besten aus Fig. 2 ersichtlich ist, an Stäben 12, die durch die als Hohlniete ausgebildeten Gelenke der Endloskette 4 von oben nach unten durchgesteckt sind und mit ihrem Kopf in Schienen 13 geführt und mit schon erwähnten nicht dargestellten Mitteln versehen sind, um ein Wenden der an ihnen hängenden Leiterplatten 3 an der Wendestation 6 zu ermöglichen.The circuit boards 3 hang, as can best be seen from FIG. 2, on rods 12 , which are pushed through the joints of the endless chain 4 designed as hollow rivets from top to bottom and are guided with their heads in rails 13 and by means not already shown are provided in order to make it possible to turn the circuit boards 3 hanging on them at the turning station 6 .
Claims (5)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19873735798 DE3735798A1 (en) | 1987-10-22 | 1987-10-22 | Method and device for the electrostatic coating of electrical printed circuit boards |
US07/260,147 US4900580A (en) | 1987-10-22 | 1988-10-20 | Process for the electrostatic lacquering of printed circuit boards |
FR8813773A FR2623962B1 (en) | 1987-10-22 | 1988-10-20 | METHOD AND APPARATUS FOR ELECTROSTATIC LACQUERING OF PRINTED CIRCUIT BOARDS |
GB8824654A GB2211113B (en) | 1987-10-22 | 1988-10-21 | Electrostatic lacquering of printed circuit boards |
IT8848481A IT1235042B (en) | 1987-10-22 | 1988-10-21 | PROCESS AND APPARATUS FOR ELECTROSTATIC LACQUERING OF PANELS OF PRINTED CIRCUITS |
JP63265279A JP2637794B2 (en) | 1987-10-22 | 1988-10-22 | Method for applying electrostatic lacquer on printed circuit boards and apparatus for its implementation |
US07/392,817 US4947787A (en) | 1987-10-22 | 1989-08-10 | Apparatus for the electrostatic lacquering of printing circuit boards |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19873735798 DE3735798A1 (en) | 1987-10-22 | 1987-10-22 | Method and device for the electrostatic coating of electrical printed circuit boards |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3735798A1 true DE3735798A1 (en) | 1989-05-03 |
Family
ID=6338874
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19873735798 Ceased DE3735798A1 (en) | 1987-10-22 | 1987-10-22 | Method and device for the electrostatic coating of electrical printed circuit boards |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3735798A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4107464A1 (en) * | 1991-03-08 | 1992-09-10 | Schmid Gmbh & Co Geb | METHOD AND DEVICE FOR SINGLE-SIDED TREATMENT OF DISK-SHAPED OBJECTS |
US5221347A (en) * | 1989-11-07 | 1993-06-22 | Bollhoff Verfahrenstechnik Gmbh & Co. Kg | Apparatus for coating both sides of plate-like substrates |
ITUB20159139A1 (en) * | 2015-12-21 | 2017-06-21 | Cefla S C | PLANT FOR HORIZONTAL PAINTING OF SHAPED DOORS |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2526763A (en) * | 1946-05-20 | 1950-10-24 | Ransburg Electro Coating Corp | Electrostatic coating apparatus |
US2780565A (en) * | 1953-07-17 | 1957-02-05 | Ransburg Electro Coating Corp | Electrostatic spray coating system and method |
DE1772976A1 (en) * | 1968-07-30 | 1971-08-12 | Teldix Gmbh | Photomechanical process for the production of printed circuit boards |
US3649408A (en) * | 1969-08-15 | 1972-03-14 | Ransburg Electro Coating Corp | Method of applying fiber-like adhesive to a substrate |
DE3304648A1 (en) * | 1982-02-10 | 1983-08-18 | Fuji Photo Film Co., Ltd., Minami-Ashigara, Kanagawa | METHOD FOR MATTING RECORDING MATERIALS |
GB2144349A (en) * | 1983-07-05 | 1985-03-06 | Missier Gabriele Trasmetal | Booth for electrostatic painting |
-
1987
- 1987-10-22 DE DE19873735798 patent/DE3735798A1/en not_active Ceased
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2526763A (en) * | 1946-05-20 | 1950-10-24 | Ransburg Electro Coating Corp | Electrostatic coating apparatus |
US2780565A (en) * | 1953-07-17 | 1957-02-05 | Ransburg Electro Coating Corp | Electrostatic spray coating system and method |
DE1772976A1 (en) * | 1968-07-30 | 1971-08-12 | Teldix Gmbh | Photomechanical process for the production of printed circuit boards |
US3649408A (en) * | 1969-08-15 | 1972-03-14 | Ransburg Electro Coating Corp | Method of applying fiber-like adhesive to a substrate |
DE3304648A1 (en) * | 1982-02-10 | 1983-08-18 | Fuji Photo Film Co., Ltd., Minami-Ashigara, Kanagawa | METHOD FOR MATTING RECORDING MATERIALS |
GB2144349A (en) * | 1983-07-05 | 1985-03-06 | Missier Gabriele Trasmetal | Booth for electrostatic painting |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5221347A (en) * | 1989-11-07 | 1993-06-22 | Bollhoff Verfahrenstechnik Gmbh & Co. Kg | Apparatus for coating both sides of plate-like substrates |
DE4107464A1 (en) * | 1991-03-08 | 1992-09-10 | Schmid Gmbh & Co Geb | METHOD AND DEVICE FOR SINGLE-SIDED TREATMENT OF DISK-SHAPED OBJECTS |
US5297568A (en) * | 1991-03-08 | 1994-03-29 | Gebr. Schmid Gbmh & Co. | Process and apparatus for treatment of board-like articles |
ITUB20159139A1 (en) * | 2015-12-21 | 2017-06-21 | Cefla S C | PLANT FOR HORIZONTAL PAINTING OF SHAPED DOORS |
EP3184179A1 (en) * | 2015-12-21 | 2017-06-28 | Cefla Societa' Cooperativa | Plant for the horizontal painting of shaped doors |
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