EP1156882B1 - Pulverbeschichtungsvorrichtung - Google Patents
Pulverbeschichtungsvorrichtung Download PDFInfo
- Publication number
- EP1156882B1 EP1156882B1 EP99968799A EP99968799A EP1156882B1 EP 1156882 B1 EP1156882 B1 EP 1156882B1 EP 99968799 A EP99968799 A EP 99968799A EP 99968799 A EP99968799 A EP 99968799A EP 1156882 B1 EP1156882 B1 EP 1156882B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bellows
- powder coating
- coating apparatus
- powder
- compressed air
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
- B05B7/1404—Arrangements for supplying particulate material
Definitions
- the invention relates to a powder coating device according to the preamble of claim 1.
- the invention relates to a powder coating device containing at least one adjustable throttle device for flow restriction of at least one Compressed air line connected to a powder flow path is connected, on which powder can be pneumatically conveyed is; for each throttle device, an electric motor that with a rotatable adjusting shaft of the throttle device is connected in terms of drive.
- a powder coating device of this type is from DE 44 09 493 A1, and similarly also from US 3,625,404, known.
- Your throttle device contains two throttles, which can be set either by hand or a servomotor.
- the Both throttles consist of one valve seat and one Valve body, which are arranged opposite to each other are.
- the two valve bodies are connected to each other. This opens a throttle to the same extent as the other is closed when one is connected to them Shaft manually or by the servomotor mentioned Rotation in a thread is adjusted axially.
- EP 0 297 309 B1 is a powder spray coating system known in which in a conveyor air line and an additional air line, each with its own actuator adjustable flow restrictor is arranged. Both lines are on the one hand on a compressed air shaft and on the other an injector for pneumatic powder feed connected.
- the conveying air creates a vacuum in the injector and sucks with it powder from a powder container. To promote more powder per unit of time becomes a larger vacuum or Suction needed to suck the powder through one correspondingly more adjustable conveying air flow generated becomes. So always when increasing or decreasing the conveying air volume approximately the same amount of air flows through the powder line which the powder is conveyed pneumatically must be at a Increasing the conveying air, the additional air can be reduced, and vice versa.
- Too much air in the powder line leads to one Blow off powder from the object to be coated. Too little Air causes pulsations and powder deposits in the Powder line.
- An electronic control device regulates the Adjustment of the two chokes depending on the pro Unit of time to be conveyed powder quantity.
- the two throttles are not mechanically, but only through the electronic one Control device linked together.
- the adjustment shaft is from an adjustable flow restrictor rotatable and makes axial adjustment movements. That is why at Use of an electric motor to turn the setting shaft an axially variable connection between the adjusting shaft and a motor shaft if the motor shaft is not is sufficiently axially displaceable. Any desired throttle setting requires a corresponding rotation or Change in angle of rotation of the motor shaft. Such throttle settings generate "click" noises through the starts and stops of the electric motor. Any electric motor is suitable as an actuator for the flow restrictor, provided it has an exact number of revolutions and can perform angular positioning depending from control by an electronic control device.
- the object of the invention is to solve a problem Possibility to create through which on simple and inexpensive way exact, low noise, reproducible Adjustment movements of the adjustment shaft by an electric motor possible are.
- the object is achieved in that the electric motor through a bellows coupling with the adjustment shaft of the Throttle device is drivingly connected, and that a Output shaft of the stepper motor, the bellows and the Adjustment shaft of the throttle device axially to each other are arranged.
- Electric motor is suitable as an electric motor Control can perform defined rotary movements, e.g. DC motors, but in particular stepper motors, and Motor-gearbox units, the gearbox being the engine speed reduced.
- the assembly 1 shown in Fig. 1 according to the invention from a housing 2 shown in longitudinal section, one on one Housing end wall 4 attached electric motor, preferably a stepper motor 6, one on an opposite Housing end wall 8 attached throttle device 10, and one in the housing 2 axially to the stepper motor 6 and Throttle device 10 arranged bellows clutch 12.
- the throttle device 10 contains at least one throttle a fixed (or axially movable) throttle valve seat and a relatively axially movable (or stationary) Throttle body.
- the throttle valve body is his axial adjustment with an adjusting shaft 14 rotatably connected.
- the bellows coupling 12 has a bellows 16, which may have multiple folds, but according to the preferred one Embodiment has only a single fold with one Wrinkle crease 18 on the outer circumference.
- the two in one inner ends 20 having a much smaller diameter and 22 of the bellows 16 are each one in diameter and preferably also a radially resilient ring element, preferably an O-ring 24 and 26, preferably made of rubber, in an outer circumferential groove 25 and 27 clamped radially and axially.
- One outer circumferential groove 25 is in a connecting ring 30 formed the rotatably on an output shaft 32 of the Stepper motor 6 is placed.
- the other outer peripheral groove 27 is formed in a connecting ring 34 which is rotatably attached to a Adapter shaft 36 is placed, which with the adjusting shaft 14 of the throttle device 10 is coupled in a rotationally fixed manner.
- the bellows 16 is angular, axial and radial to compensate for angular, axial and / or radial deviations and Changes between the output shaft 32 and the Adjustment shaft 14 movable in itself. This means that their radially inner end sections 20 and 22 angular, are axially and radially movable relative to each other. On The bellows 16 is relatively stiff but torsionally stressed.
- the Bellows 16 is preferably made of rubber or an in similarly flexible and inherently resilient Material.
- the application of assembly 1 of Fig. 1 is as follows described with reference to FIG. 2.
- the powder coating device 2 contains three structural units 1.
- the powder coating device of Fig. 2 contains one Conveying air line 40, a first additional air line 42 and a second auxiliary air line 44, in each of which one adjustable throttle 46 of throttle device 10 one another assembly 1 is arranged and which on the one hand a compressed air shaft 48 and on the other hand to an injector 50 are connected.
- the injector 50 operates according to the Venturi principle as a pneumatic pump.
- the conveyor belt of the conveyor air line 40 flows into the injector 50 from an injector nozzle 52 axially into an axially opposite lying powder outlet channel 54 and produced in one intermediate vacuum section 56 a negative pressure or suction.
- This vacuum or suction sucks from you Powder container 56 coating powder through a powder inlet 60 in the conveying air flow.
- the mixture of conveying air flow and powder flows through a powder hose 62 to one Spray device 64, and is from this to a coating object 66 sprayed.
- the first Additional air line 42 is so far on the powder outlet channel 54 downstream of the vacuum region 56 connected that they have no or only negligible negative pressure has little influence. This first additional air serves the Keeping the total air volume constant by balancing Changes in the conveying air flowing per unit of time, if the conveying air of the conveying air line 40 for conveying more powder increases or to promote less powder is reduced.
- the second auxiliary air line 44 is rarely used and can be used to determine the strength of the negative pressure in the Vacuum area 56 additionally or independently of the Influence conveying air of the conveying air line 40 and thus also the amount of powder conveyed per unit of time influence.
- An electronic control device 68 regulates in Dependence on at least one setpoint 70 per Unit of time to be conveyed powder quantity and / or per Unit of time to be conveyed air quantity of the conveying air line 40, the first auxiliary air line 42 and / or the second Auxiliary air line 44 the setting of the assigned Throttle 46 through the electric stepper motor 6 Unit 1.
- FIG. 3 shows a structural unit 101 with an electrical one Stepper motor 6, which has a bellows coupling 12 described type rotatably with the adjusting shaft 14 a Double valve body 72 is drivingly connected.
- the Double valve body 72 contains axially rigid with each other connected two throttle valve bodies 74 and 76, which in opposite directions each with a throttle valve seat 75 or 77 cooperate.
- the Throttle device 10 of Fig. 3 is schematically in Axial section shown.
- the double valve body 72 is in Threads 80 or 81 of a housing 84 optionally by manual adjustment element 86 or by the stepper motor 6 rotatable, which over the bellows coupling 12 and Adjustment shaft 14 with the axially arranged Double valve body 72 is rotatably connected.
- a central one Compressed air inlet 86 is on the one hand via a compressed air line 87 with a pressure regulator 88 to the compressed air source 48 connected and on the other hand in the housing 84 by a Channel 90 through which the double valve body 72 axially extends, with the two throttle valve seats 75 and 77 connected in terms of flow.
- the axial channel 90 is through the Throttle valve bodies 74 and 76 from a first outlet 91 to Conveying air line 40 or a second outlet 92 to the first Auxiliary air line 42 separated.
- the total amount of air from conveying air and first Additional air is always kept constant by Unit 101 the additional air of the first additional air line 42 is increased or reduced in a predetermined ratio, how the conveying air of the conveying air line 40 is reduced or is increased.
- Another advantage of the embodiment according to Fig. 3 is that on an electronic Control device 68 for controlling the stepper motor 6 only a single setpoint 70 is required, which in one direct relationship to the conveyed air volume to be conveyed Conveying air line 40 and also simultaneously in one predetermined ratio to the amount of powder to be conveyed per Time unit stands.
Description
Eine geräuscharme, exakte und reproduzierbare Einstellung der Drosseleinrichtung. Ein Schrittmotor kann auf einfache Weise durch elektrische Impulse schrittweise um eine jedem Schritt entsprechende Winkelstrecke gedreht werden. Jeder Schritt entspricht einer bestimmten Drosseleinstellung. Da für jede Drosseleinstellung die dafür erforderliche Schrittanzahl vorbestimmbar ist, kann jede Drosseleinstellung jederzeit wiederholt genau eingestellt werden. Bei Verwendung von getrennten Drosseln für getrennte Druckluftleitungen kann das pro Zeiteinheit strömende Luftvolumen in jeder Druckluftleitung individuell und exakt eingestellt werden. Hierfür wird vorzugsweise eine elektronische Steuereinrichtung verwendet, welcher Sollwerte vorgebbar sind für die pro Zeiteinheit zu fördernde Pulvermenge und/oder dafür erforderliche Luftmengen. Der verstellbare Teil der Drossel ist mechanisch mit einer Einstellwelle verbunden, die zur Bewegung vor und zurück des einstellbaren Elementes in einem Gewinde axial bewegbar ist. Durch das Gewinde der Drossel wird ihr verstellbarer Teil, normalerweise nicht ein Ventilsitz, sondern ein Ventilkegel, entsprechend vor und zurück bewegt. Diese axiale Bewegung muß ausgeglichen werden relativ zu der axial ortsfesten Abtriebswelle des Schrittmotors. Dieser axiale Ausgleich erfolgt gemäß der Erfindung auf einfache Weise durch eine Faltenbalgkupplung. Die Faltenbalgkupplung dient außerdem zur starken Lärmdämpfung des sich abgehackt in kleinen Schritten drehenden Schrittmotors. Diese Schritte des Schrittmotors würden ohne die Faltenbalgkupplung eine nicht zu vernachlässigende Lärmbelästigung sein. Ein durch die Produktion und/oder die Montage entstehender kleiner winkeliger, axialer und/oder radialer Achsversatz zwischen der Abtriebswelle des Schrittmotors und der Einstellwelle der Drossel wird durch die Faltenbalgkupplung automatisch ausgeglichen. Die ganze Vorrichtung ist mit einfachen, handelsüblichen Bauelementen herstellbar und deshalb preiswert. Der Balg der Faltenbalgkupplung hat die Eigenschaft, daß er auf Torsion sehr steif, aber dämpfend wirkt, und auf axiale Belastung verhältnismäßig weich ist. Der Faltenbalg der Faltenbalgkupplung kann aus jedem flexiblen Material, vorzugsweise auch federelastisch komprimierbarem Material bestehen, vorzugsweise aus Gummi. Die Erfindung wird im folgenden mit Bezug auf die Zeichnungen anhand von bevorzugten Ausführungsformen als Beispiele beschrieben. In den Zeichnungen zeigen
- Fig. 1
- schematisch eine Baueinheit einer Drosseleinrichtung mit einem über eine Einfaltenbalgkupplung antriebsmäßig mit ihr verbundenen elektrischen Schrittmotor,
- Fig. 2
- schematisch eine Pulverbeschichtungsvorrichtung nach der Erfindung und
- Fig. 3
- schematisch eine weitere Ausführungsform einer
Baueinheit, bestehend aus einer Drosseleinrichtung
und einer mit ihrem Einstellelement über eine
Einfaltenbalgkupplung verbundenen elektrischen
Schrittmotor, für eine
Pulverbeschichtungsvorrichtung.
Claims (12)
- Pulverbeschichtungsvorrichtung enthaltend mindestens eine einstellbare Drosseleinrichtung (10; 110) zur Strömungsdrosselung von mindestens einer Druckluftleitung, welche an einen Pulverströmungsweg (54, 62) angeschlossen ist, auf welchem Pulver pneumatisch förderbar ist; für jede Drosseleinrichtung einen Elektromotor (6), der mit einer drehbaren Einstellwelle (14) der Drosseleinrichtung antriebsmäßig verbunden ist;
dadurch gekennzeichnet, daß der Elektromotor (6) durch eine Faltenbalgkupplung (12) mit der Einstellwelle der Drosseleinrichtung antriebsmäßig verbunden ist; daß eine Abtriebswelle (32) des Elektromotors (6), die Faltenbalgkupplung (12) und die Einstellwelle (14) der Drosseleinrichtung (10; 110) axial zueinander angeordnet sind. - Pulverbeschichtungsvorrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß die Faltenbalgkupplung (12) einen Faltenbalg hat, der nur eine Balgfalte hat. - Pulverbeschichtungsvorrichtung nach Anspruch 2,
dadurch gekennzeichnet, daß der Knick (18) der Falte am Außendurchmesser des Faltenbalges (16) liegt. - Pulverbeschichtungsvorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß die Faltenbalgkupplung mit ihrem einen Ende an der Elektromotor-Abtriebswelle (32) und mit ihrem anderen Ende an der Einstellwelle (14) der Drosseleinrichtung (10; 110) drehfest befestigt ist. - Pulverbeschichtungsvorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß der Faltenbalg (16) an mindestens einem Ende durch einen Ring (24) in eine Umfangsnut eines Kuppiungselementes (30, 34) eingespannt ist. - Pulverbeschichtungsvorrichtung nach Anspruch 5,
dadurch gekennzeichnet, daß der Ring (24, 26) ein O-Ring ist. - Pulverbeschichtungsvorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß der Faltenbalg aus einem ähnlich wie Gummi federelastisch komprimierbaren und dehnbaren Material besteht. - Pulverbeschichtungsvorrichtung nach Anspruch 7,
dadurch gekennzeichnet, daß der Faltenbalg (16) aus Gummi besteht. - Pulverbeschichtungsvorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß der Elektromotor (6) ein Schrittmotor ist. - Pulverbeschichtungsvorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß mindestens zwei Druckluftleitungen (40, 42, 44) vorgesehen sind, jeder dieser Druckluftleitungen eine Baueinheit (1) zugeordnet ist, die in der genannten Art und Weise eine in der betreffenden Druckluftleitung angeordnete Drosseleinrichtung (10, 46) und einen über eine Faltenbalgkupplung (12) mit ihr verbundenen Elektromotor (6) aufweist, und daß eine elektronische Steuereinrichtung (68) zur koordinierten Steuerung der beiden Eletromotoren (6) der beiden Baueinheiten (1) vorgesehen ist. - Pulverbeschichtungsvorrichtung nach einem der Ansprüche 1 bis 9,
dadurch gekennzeichnet, daß die Drosseleinrichtung (110) zwei miteinander gekoppelte, von dem Elektromotor (6) über die Faltenbalgkupplung einstellbare Strömungsdrosseln (74, 75, 76, 77) aufweist, zur Luftverteilung von Druckluft (48) in einem vorbestimmten Verhältnis von einem Drucklufteinlaß (86) auf zwei der Druckluftleitungen (40, 42). - Pulverbeschichtungsvorrichtung nach Anspruch 10 oder 11,
dadurch gekennzeichnet, daß eine der beiden Druckluftleitungen eine Förderluftleitung (40) ist, die an einem Injektor (50) zum Ansaugen von Pulver durch Erzeugung eines Unterdruckes angeschlossen ist, und daß die andere Druckluftleitung (42) eine Zusatzluftleitung ist, welche stromabwärts von der Förderluftleitung (40) in den Pulverströmungsweg (54, 62) mündet.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19910748A DE19910748A1 (de) | 1999-03-11 | 1999-03-11 | Pulverbeschichtungsvorrichtung |
DE19910748 | 1999-03-11 | ||
PCT/EP1999/009939 WO2000053334A1 (de) | 1999-03-11 | 1999-12-15 | Pulverbeschichtungsvorrichtung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1156882A1 EP1156882A1 (de) | 2001-11-28 |
EP1156882B1 true EP1156882B1 (de) | 2003-04-09 |
Family
ID=7900527
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99968799A Expired - Lifetime EP1156882B1 (de) | 1999-03-11 | 1999-12-15 | Pulverbeschichtungsvorrichtung |
Country Status (11)
Country | Link |
---|---|
US (1) | US6589341B1 (de) |
EP (1) | EP1156882B1 (de) |
JP (1) | JP3553503B2 (de) |
CN (1) | CN1095694C (de) |
AT (1) | ATE236728T1 (de) |
BR (1) | BR9910775A (de) |
CA (1) | CA2334278C (de) |
DE (2) | DE19910748A1 (de) |
ES (1) | ES2194546T3 (de) |
PL (1) | PL191611B1 (de) |
WO (1) | WO2000053334A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101115568B (zh) * | 2005-02-17 | 2012-02-29 | Itw吉马股份公司 | 压缩空气节流装置和粉末喷镀涂层装置 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10357814A1 (de) * | 2003-12-10 | 2005-07-14 | Itw Gema Ag | Gasleitungssystem, insbesondere in einer Pulversprühbeschichtungsvorrichtung |
US20060102075A1 (en) * | 2004-11-18 | 2006-05-18 | Saylor Austin A | Fluid flow control |
CN105820667A (zh) * | 2016-05-06 | 2016-08-03 | 安徽华辉塑业科技股份有限公司 | 儿童玩具表面涂料及其制备方法 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1752106A (en) * | 1927-12-19 | 1930-03-25 | Cook Electric Co | Flexible coupling |
US3063261A (en) * | 1961-05-15 | 1962-11-13 | Chain Belt Co | Flexible coupling for shafts |
DE1918621C3 (de) * | 1969-04-12 | 1972-01-20 | Stromag Maschf | Elastische Wellenkupplung |
US3625404A (en) | 1969-06-02 | 1971-12-07 | Ransburg Electro Coating Corp | Apparatus and method for dispensing particulate material |
US3612549A (en) * | 1970-05-25 | 1971-10-12 | Melvin H Berkowitz | Pressure seal |
US3727429A (en) * | 1971-06-10 | 1973-04-17 | Reliance Electric Co | Shaft coupling |
US3888093A (en) * | 1974-02-21 | 1975-06-10 | Reliance Electric Co | Flexible shaft coupling |
DE2927955C2 (de) * | 1979-07-11 | 1982-12-30 | Messerschmitt-Bölkow-Blohm GmbH, 8000 München | Verfahren zur Herstellung eines Kupplungselements |
EP0171156B1 (de) * | 1984-07-12 | 1988-03-30 | Masanori Mochizuki | Wellenkupplung |
DE3721875A1 (de) | 1987-07-02 | 1989-01-12 | Gema Ransburg Ag | Verfahren und einrichtung fuer eine pulverspruehbeschichtungsanlage |
US5233247A (en) * | 1991-07-16 | 1993-08-03 | The United States Of America As Represented By The Secretary Of The Navy | Precision drive and speed reduction device |
CH688989A5 (de) * | 1993-03-26 | 1998-07-15 | Ribnitz Peter | Vorrichtung zum Fördern von Pulver |
JP3867176B2 (ja) * | 1996-09-24 | 2007-01-10 | アール・アイ・ディー株式会社 | 粉体質量流量測定装置、およびこれを適用した静電粉体塗装装置 |
-
1999
- 1999-03-11 DE DE19910748A patent/DE19910748A1/de not_active Withdrawn
- 1999-12-15 AT AT99968799T patent/ATE236728T1/de not_active IP Right Cessation
- 1999-12-15 CA CA002334278A patent/CA2334278C/en not_active Expired - Fee Related
- 1999-12-15 JP JP2000603815A patent/JP3553503B2/ja not_active Expired - Fee Related
- 1999-12-15 US US09/701,439 patent/US6589341B1/en not_active Expired - Fee Related
- 1999-12-15 PL PL345126A patent/PL191611B1/pl not_active IP Right Cessation
- 1999-12-15 DE DE59905012T patent/DE59905012D1/de not_active Expired - Lifetime
- 1999-12-15 CN CN99805981A patent/CN1095694C/zh not_active Expired - Fee Related
- 1999-12-15 ES ES99968799T patent/ES2194546T3/es not_active Expired - Lifetime
- 1999-12-15 BR BR9910775-9A patent/BR9910775A/pt unknown
- 1999-12-15 WO PCT/EP1999/009939 patent/WO2000053334A1/de active IP Right Grant
- 1999-12-15 EP EP99968799A patent/EP1156882B1/de not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101115568B (zh) * | 2005-02-17 | 2012-02-29 | Itw吉马股份公司 | 压缩空气节流装置和粉末喷镀涂层装置 |
Also Published As
Publication number | Publication date |
---|---|
CN1095694C (zh) | 2002-12-11 |
ES2194546T3 (es) | 2003-11-16 |
DE19910748A1 (de) | 2000-09-14 |
ATE236728T1 (de) | 2003-04-15 |
PL345126A1 (en) | 2001-12-03 |
CA2334278C (en) | 2005-05-24 |
CA2334278A1 (en) | 2000-09-14 |
WO2000053334A1 (de) | 2000-09-14 |
BR9910775A (pt) | 2001-02-13 |
US6589341B1 (en) | 2003-07-08 |
EP1156882A1 (de) | 2001-11-28 |
PL191611B1 (pl) | 2006-06-30 |
CN1300241A (zh) | 2001-06-20 |
JP3553503B2 (ja) | 2004-08-11 |
DE59905012D1 (de) | 2003-05-15 |
JP2002537999A (ja) | 2002-11-12 |
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