CN100467135C - Static coating device and method for reducing coating pollution of static coating device - Google Patents
Static coating device and method for reducing coating pollution of static coating device Download PDFInfo
- Publication number
- CN100467135C CN100467135C CNB2006101290740A CN200610129074A CN100467135C CN 100467135 C CN100467135 C CN 100467135C CN B2006101290740 A CNB2006101290740 A CN B2006101290740A CN 200610129074 A CN200610129074 A CN 200610129074A CN 100467135 C CN100467135 C CN 100467135C
- Authority
- CN
- China
- Prior art keywords
- arm
- voltage
- spray gun
- coating material
- electrostatic
- 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
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
- 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
- B05B5/053—Arrangements for supplying power, e.g. charging power
- B05B5/0531—Power generators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
- B05B13/0447—Installation or apparatus for applying liquid or other fluent material to conveyed separate articles
- B05B13/0452—Installation or apparatus for applying liquid or other fluent material to conveyed separate articles the conveyed articles being vehicle bodies
-
- 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
- B05B5/053—Arrangements for supplying power, e.g. charging power
- B05B5/0533—Electrodes specially adapted therefor; Arrangements of electrodes
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Electrostatic Spraying Apparatus (AREA)
- Spray Control Apparatus (AREA)
Abstract
The invention provides a novel art for preventing a robot arm from fouling with a paint mist drifting in the air without heading for an object to be painted with regard to an electrostatic coating apparatus having a painting gun and the robot arm for supporting the painting gun. The electrostatic coating apparatus (1) comprises a painting gun (2) which sprays a paint to the object to be painted (9), and the robot arm (3) which moves the painting gun (2) for the object (9). The electrostatic coating apparatus (1) is configured so that the painting gun (2) applies voltage to the mist (the paint mist) and that a voltage having the same polarity as that applied to the paint mist is applied to the surface of the robot arm (3) (a first arm (3a)).
Description
Technical field
The method that the coating that the present invention relates to carry out the electrostatic coating equipment of electrostatic coating and reduce electrostatic coating equipment is polluted.More particularly, the electrostatic coating equipment that the present invention relates to have spray gun and support the robots arm of this spray gun, and be used to reduce the method that the robots arm is suspended in airborne coating material spraying pollution.
Background technology
For example, a kind of electrostatic coating equipment that carries out electrostatic coating is disclosed for Japanese Patent Application Publication JP-A-6-142561 number.This electrostatic coating equipment is by being connected to a static board on spray gun and the robots arm, stop and be suspended in the air coating material spraying of not advancing and stick on this spray gun and the robots arm towards coated object, utilize the electrostatic repulsion of this static board, this static board is applied in and puts on this spray gun pressing element that powers on the voltage of identical polar.
And, the applicant of this application also discloses a kind of by providing electrostatic attraction electrode to prevent that coating material from sticking to the method on spray gun and the robots arm, and this electrostatic attraction electrode is applied in and is applied to the voltage (Japanese Patent Application Publication JP-A-2006-82064) of the voltage identical polar on this spray gun and the robots arm.And, also utilize needle electrode to improve electric-field intensity as electrostatic attraction electrode.
But, utilize the method for static board, Japanese Patent Application Publication JP-A-6-142561 disclosed method for example, the posture that this robots arm can take is restricted, and this may influence coating quality.In this case, need additional spray gun and robots arm separately.
And, when utilizing a plurality of spray guns to apply, though the static board that is arranged on each spray gun and each robots arm prevents that really injected coating material from sticking on the specific spray gun and robots arm that sprays, do not prevent to stick on another spray gun and the robots arm from the coating material of a spray gun and robots arm's injection.Just, spray gun and robots arm are finally polluted by the coating material from another lance ejection.
Also have, the robots arm is grounding to zero volt, so that increase insulation distance, the distance that is increased between this static board and this robots arm is essential.But guarantee that this stops the enough electric-field intensity of acquisition apart from meeting.As a result, can not prevent fully that coating material from sticking on spray gun and the robots arm.
On the other hand, Japanese Patent Application Publication JP-A-2006-82064 number disclosed structure can prevent fully that coating material from adhering to spray gun, but can not prevent to adhere to the robots arm, so need prevent better that coating material from adhering to the robots arm.
And the robots arm is grounding to zero volt, need be arranged on position away from this robots arm so be arranged on electrostatic attraction electrode on the robots arm, so that increase insulation distance.But, stoped like this to obtain enough electric-field intensity.As a result, can not prevent fully that coating material from sticking on spray gun and the robots arm.In addition, electrode need be arranged on the size that causes increasing whole coating equipment away from robots arm's position, and may disturb with robots arm's manipulation.
Summary of the invention
Therefore the purpose of this invention is to provide a kind of being used for prevents that at the electrostatic coating equipment that has spray gun and support the robots arm of this spray gun the robots arm is suspended in the technology that the coating material spraying of not advancing towards coated object in the air is polluted.
A first aspect of the present invention relates to a kind of electrostatic coating equipment, it has coating material is ejected into spray gun on the coated object, with the robots arm with respect to this coated this spray gun of movement of objects, and this equipment is configured to the coating material in this spray gun is applied voltage, it is characterized in that:
This robots arm comprises first arm and second arm, and this spray gun is installed in an end on this first arm, and this second arm is connected in the other end of this first arm an end and the electrical connection between this first arm and ground connection side is insulated; And put on the surface of this first arm with the voltage of the voltage identical polar that puts on this coating material.
According to first aspect, this robots arm is recharged itself, makes to form to leave the electromagnetism line of force that this robots arm extends.As a result, form the electric field potential barrier of repelling this coating material spraying and being repelled around this robots arm, thereby make it possible to prevent to be suspended in airborne coating material spraying and stick on this robots arm by this coating material spraying.
According to this structure, can keep constant voltage to put on the state of first arm.
This second arm can be made of the parts with electrical insulation property.
This second arm can constitute with resin piece.
According to the said structure of second arm, the electrical connection between this first arm and the ground connection side of can insulating.
First electrode that is applied thereto with the voltage of the voltage identical polar that puts on coating material can be arranged on this first arm neighboring.
This structure of first arm makes it possible to form repel and is centered around this first electrode (i.e. first arm) coating material spraying on every side and the electric field potential barrier of being repelled by this coating material spraying.
First needle electrode that is applied thereto with the voltage of the voltage identical polar that puts on coating material can saliently be arranged on this first electrostatic attraction electrode.
This structure of first electrostatic attraction electrode makes it possible to form very strong static electric field around this first needle electrode.
This first electrostatic attraction electrode can be the annular electrode that forms with annular shape, wherein with respect to the angular end portion of sectional tool longitudinally of this first arm.
Second electrode that is applied thereto with the voltage of the voltage identical polar that puts on coating material can be arranged on the neighboring of spray gun.
This structure of spray gun makes it possible to form the coating material spraying on every side of this spray gun of repulsion and the electric field potential barrier of this vaporific coating material repulsion of quilt.
This second electrostatic attraction electrode can be second needle electrode.
The structure of this second electrostatic attraction electrode makes it possible to form very strong static electric field around this spray gun.
The length of second needle electrode can be according to the rotary speed setting of bell-jar, and this bell-jar is driven and makes the coating material atomizing in rotatable mode.
Apply first power supply of voltage and can be other power supply of branch to spray gun to the second source that the robots arm applies voltage.
According to this structure, can be set in the magnitude of voltage that each position of spray gun and robots arm applies.According to the suspended state of coating material spraying and this coating material be sprayed on spray gun and the robots arm coherent condition suitably regulation voltage level can prevent from effectively to pollute.
The voltage that first power supply and second source can output voltage values be independently set.
A second aspect of the present invention relates to the method that a kind of coating that is used to reduce electrostatic coating equipment is polluted, this coating equipment has coating material is ejected into spray gun on the coated object, with robots arm with respect to this coated this spray gun of movement of objects, and this equipment is configured to the coating material in this spray gun is applied voltage
This robots arm comprises first arm and second arm, and this spray gun is installed in an end on this first arm, and this second arm is connected in the other end of this first arm an end and the electrical connection between this first arm and ground connection side is insulated,
Described method comprises the steps:
To put on the surface of this first arm with the voltage of the voltage identical polar that puts on this coating material.
According to second aspect, can prevent effectively that coating material from adhering to the robots arm.
The method of reduce polluting can also comprise the voltage with the voltage identical polar that puts on coating material is put on the step that is arranged on the electrostatic attraction electrode on this spray gun neighboring.
This step can prevent effectively that coating material from adhering to this spray gun.
Description of drawings
From becoming and know better below in conjunction with accompanying drawing description of preferred embodiments aforementioned and other purposes, feature and advantage of the present invention, wherein same numeral is used to represent same parts, wherein:
Fig. 1 is the view that illustrates according to the electrostatic coating device structure of first embodiment of the invention;
Fig. 2 illustrates the view that is formed on spray gun and robots arm's electromagnetism line of force on every side by the voltage that applies;
Fig. 3 is the view that spray gun and robots arm's structure is shown;
Fig. 4 is the view that the structure of second arm is shown;
Fig. 5 is the sectional view that annular electrode and needle electrode are shown;
Fig. 6 is the view that the relation between the distance between weak current and robots arm and the coated object is shown.
The specific embodiment
The pattern of the present invention of implementing is described below with reference to the accompanying drawings.As illustrated in fig. 1 and 2, have according to the electrostatic coating equipment 1 of exemplary embodiments of the present invention coating material is sprayed in the spray gun 2 of coated object 9 with respect to the robots arm 3 of this this spray gun 2 of coated movement of objects.This electrostatic coating equipment 1 structure can put on coating material (that is, the coating material spraying) with voltage by enough this spray guns 2, and is applied in this robots arm 3 (i.e. the first arm 3a) with the voltage of the voltage identical polar that puts on coating material.
According to this structure, this robots arm 3a (see figure 2) self is recharged, the electromagnetism line of force m1 (see figure 2) that extend on the surface that makes formation leave this first arm 3a.As a result, around this robots arm 3, form the electric field potential barrier of repelling the coating material spraying and being repelled, therefore, can prevent to be suspended in airborne coating material spraying and stick on this robots arm 3 by this coating material spraying.
Below will describe this structure in detail.As shown in Figure 1, this robots arm 3 comprises vertical arm 3A and horizontal arm 3B, and the bottom of this vertical arm 3A is connected in base 31 in rotatable mode, and the rearward end of this horizontal arm 3B is connected in this vertical arm 3A top in rotatable mode.This robots arm 3 rotates on their pivot point separately by this vertical arm 3A and horizontal arm 3B and moves the spray gun 2 that is arranged on this horizontal arm 3B end with respect to coated object 9.
Still as shown in Figure 1, this horizontal arm 3B comprises the first arm 3a, the second arm 3b and the 3rd arm 3c.This first arm 3a is connected in the connection cylinder 2a of this spray gun 2 in its end portion.This second arm 3b is connected in the first arm 3a in its end portion, and the 3rd arm 3c is connected in the second arm 3b in its end portion, and is connected in vertical arm 3A in its another end portion in rotatable mode.And the 3rd arm 3c is via vertical arm 3A ground connection (promptly being connected in the earth or ground).
In addition, as shown in figures 1 and 3, two flexible portion 33a and 33b (see figure 3) are arranged on the first arm 3a, make that the first arm 3a can be crooked in each of these two flexible portion 33a and 33b.As a result, spray gun 2 can change its angle along clockwise direction among the figure or counter-clockwise direction.And, have this connection cylinder 2a that spray gun is connected in its end and be configured to along axially therefore to make spray gun 2 change its angle around this axis that connects cylinder 2a with respect to first arm 3a rotation.By this way, this spray gun 2 can freely be provided with respect to the angle of coated object 9.
Also have, as shown in Figure 1 to Figure 3, import the first arm 3a, and be applied in the whole outer surface of this first arm 3a with the voltage of the voltage identical polar that puts on this spray gun 2 from the high voltage of high-tension cable 6b.And as shown in Figure 1, this high-tension cable 6b is connected in the cascade circuit 7b that is arranged among the second arm 3b.Import this cascade circuit 7b by the voltage that voltage generator 5b produces via voltage cables 15b, and this high voltage is imported this high-tension cable 6b from this cascade circuit 7b then.
In addition, to the exemplary configurations shown in Figure 3, the annular electrode 8 (being annular electrostatic attraction electrode) that is applied thereto with the voltage of the voltage identical polar that puts on coating material is arranged on the neighboring of this first arm 3a at Fig. 1.By this annular electrode 8 is applied voltage, voltage puts on the whole first arm 3a, and this voltage forms and extends the surface electrical magnetic line of force m1 that leaves this first arm 3a.And this electromagnetism line of force m1 forms the electric field potential barrier around this first arm 3a, and this electric field potential barrier repulsion is applied in the coating material spraying of negative voltage thereon and is repelled (see figure 2) by this coating material spraying.
In addition, annular electrode 8 has square cross-sectional shape, and as shown in Figure 5, still, it is not limited thereto.Alternatively, the cross sectional shape of this annular electrode can be a triangle or polygonal etc.Unique requirement is the angular end portion 8b of its sectional tool (being sharp-pointed edge).And, as long as this annular electrode 8 is annular shape, just can form radially towards the uniform electric field of the outside of this annular electrode 8, as shown in Figure 3.In addition, except this continuous annular shape, a plurality of electrodes also can be to be equidistantly spaced on the neighboring of this first arm 3a.
In addition, as shown in Figure 3, the DC voltage that is about 50kv puts on the position II of the formation first arm 3a and the first arm 3a between the III.And this first arm 3a is made of round metal cylindricality part, so voltage puts on this first arm 3a uniformly.
Also have, this first arm 3a is connected in the 3rd arm 3c via the second arm 3b with insulating property (properties), and the 3rd arm 3c electric insulation of the first arm 3a and ground connection is so voltage can put on the first arm 3a as mentioned above.
Also have, as shown in Figure 3, a plurality of coniform needle electrode 8a from annular electrode 8 with towards the footpath to the outside radially the form of projection be arranged on this annular electrode 8.Except as shown in Figure 3 with axially vertically the needle electrode 8a of projection of this annular electrode 8, they also can be arranged to make their (towards this spray guns 2) or (leave this spray gun 2) backward and tilt forward.Therefore all needle electrode 8a have same structure, only relate to the form of single annular electrode when possible below for convenience's sake.
In addition, as shown in Figure 2, needle electrode 8a forms the electromagnetism line of force m2 that extends along the direction of leaving this annular electrode 8 from this needle electrode 8a.Also have, this electromagnetism line of force m2 forms the electric field potential barrier of repelling this coating material spraying and being repelled by this coating material spraying around the first arm 3a (i.e. this annular electrode 8), and this coating material spraying is applied with the negative voltage (see figure 2).
Also have, as shown in Figure 3, the voltage that puts on needle electrode 8a is reverse voltage, promptly with the voltage that puts on the first arm 3a, is about the DC voltage of 50kv, has identical polarity.
In addition, as shown in Figure 5, making the terminal part of needle electrode 8a be divided into wedge angle is effective for forming high voltage electromagnetism line of force m2.The end of this wedge angle can also form highfield.Therefore, the terminal end shape of this needle electrode 8a is not limited to taper shape especially.The end that is needle electrode 8a can be other shape, as long as it is wedge angle (promptly having sharp-pointed edge).Therefore, for example this end can form and is divided into a plurality of cusps.Conduction brush can be installed on the outer surface of this annular electrode 8.And according to specification requirement of electrostatic coating equipment 1 etc., this structure also can only be provided with annular electrode 8, and needle electrode 8a is not set.
In addition, as shown in Figure 3, consider needle electrode 8a from the first arm 3a extension elongation L (hereinafter referred to as " extension elongation L "), this extension elongation L must long enough apply with convenient voltage and prevents because the electric energy that flows through between this needle electrode 8a and this first arm 3a causes sparking (may cause the discharge of catching fire) during this first arm 3a.According to exemplary embodiment of the present invention, as mentioned above, voltage puts on this first arm 3a, so such sparking problem can not take place.
In addition, therefore when reducing extension elongation L, can form high-tension electricity magnetic line of force m2 effectively.As a result, the external diameter of the whole first arm 3a can reduce, and makes equipment compact more like this.
In addition, as shown in Figure 3, needle electrode 8a is set on annular electrode 8 makes it possible to form such condition, promptly when robots arm 8 (i.e. the first arm 3a) undesiredly near the time near the coated object 9 of ground connection, the easier weak current that makes flows between coated object 9 and annular electrode 8.
Fig. 6 is the curve map that the relation between the distance between this weak current and this robots arm 3 and the coated object 9 is shown.It is that the weak current of A2 flows in distance D 2 in the structure with needle electrode 8a that this curve map illustrates current value.Here, in structure, detect electric current A2, therefore can detect the abnormal close of robots arm 3 in distance D 2 with needle electrode 8a.On the other hand, in the structure that does not have needle electrode 8a, the weak current that only has current value A1 flows to distance D 2, and this current value A1 is difficult to detect.In this case, if electric current A2 detects at the D1 place and robots arm 3 becomes that undesired current value increases suddenly thereafter near coated object 9 before arriving D1, may produce spark like this and may catch fire.
Know clearly from top description, utilize the easier weak current that makes of needle electrode 8a flow to make that this electric current can be easier to detected when the close coated undesiredly object 9 of robots arm 3.In other words, needle electrode 8a is set makes electric current can be more prone between this robots arm 3 and coated object 9, flow, thereby increase undesired approaching detection sensitivity and improve security.
Also have, as Fig. 1, Fig. 3 and shown in Figure 4, this cylindrical second arm 3b with electrical insulation property is arranged between this first arm 3a and the 3rd arm 3c.The material of the second arm 3b is the high-resistance resin polyamide (for example 10 for example with electrical insulating property value
10Ω or higher).As a result, the 3rd arm 3c of the first arm 3a and ground connection is by the second arm 3b electric insulation.
According to said structure, as shown in Figure 3, the resistance of the second arm 3b stops electric current to flow in forming the zone from position III to position IV of this second arm 3b, and makes the DC voltage that is about 50kv can put on the position II of this first arm of formation 3a and the zone between the III of position.
Here, if the first arm 3a and the 3rd arm 3c be not by second arm 3b insulation, so because the 3rd arm 3c ground connection can not keep constant voltage to put on the state of first arm.For this reason, provide electric insulation by the second arm 3b as mentioned above.
As mentioned above, robots arm 3 comprises the first arm 3a and the second arm 3b, this first arm 3a part endways is connected in spray gun, and this second arm 3b part endways is connected in this first arm 3a and the electrical connection between this first arm 3a and ground connection side is insulated.The voltage that this robots arm 3 was configured such that and put on the voltage identical polar of coating material is applied in the surface of this first arm 3a.
Also have, from the viewpoint that prevents that the coating material spraying from adhering to, the material of this second arm 3b can be the resin with low water absorption, for example polyamide.In addition, from the viewpoint of intensity, the material of this second arm 3b can be the resin with high mechanical properties (promptly being not easy to reverse or bending), for example polyamide.
Also have, as shown in Figure 4, in order to make this first arm 3a and the 3rd arm 3c insulation, be arranged on be used to make this first arm 3a deflection in this first arm 3a and rotate this spray gun 2 connection cylinder 2a first driving shaft 24 also must with driving shaft 26 insulation on the 3rd arm 3c side, this driving shaft is as the drive source of first driving shaft 24.
Therefore, be arranged on this first arm 3a side and transmission changes this first driving shaft 24 of driving force of the angle of this spray gun 2, have a high resistance (for example 10 such as polyamide by using
10Second driving shaft 25 of resin manufacture Ω or higher) is connected in the 3rd driving shaft 26 that is arranged on the 3rd arm 3c side, so that this first driving shaft 24 and the 3rd driving shaft 26 electrically insulated from one another.
According to this structure, even if being electrically connected, the first arm 3a and first driving shaft 24 make electric power between them, to flow, this electric power is stopped by this second driving shaft 25 to flowing of the 3rd driving shaft 26, therefore, can keep constant voltage to be applied to the state of the first arm 3a.
In addition, from the viewpoint of intensity, the material of second driving shaft 25 preferably has the resin of mechanical strength (that is, being not easy to reverse or bending), for example polyamide.And, can adopt metal gear in the coupling part of driving shaft 24,25 and 26, to guarantee enough mechanical strengths.
In addition, as shown in Figure 3, spray gun 2 has shaping air ring 21 and the bell-jar 22 that is arranged on the rotatable driving in this shaping air ring 21 at the end of main casing 20.Also have, the end portion of this bell-jar 22 reaches the outside from these shaping air ring 21 the insides.The coating material that the centrifugal force of bell-jar 22 by rotation is atomized is pushed to coated object 9 by the shaping air that blows out from this shaping air ring 21.
In addition, as shown in Figure 1 to Figure 3, high voltage is imported this spray gun 2 from this voltage cables 6a, so that this high voltage is applied to by on the coating material of bell-jar 22 atomizings of this spray gun 2.And as shown in Figure 1, this voltage cables 6a is connected in the cascade circuit 7a that is arranged among the second arm 3b.Import this cascade circuit 7a by the voltage that voltage generator 5a produces via voltage cables 15a, the high voltage from cascade circuit 7a is imported into high-voltage cable 6a then.
Here, as shown in Figure 3, the voltage that puts on coating material is reverse voltage, promptly with the voltage that puts on this first arm 3a, is about the DC voltage of 90kv, has identical polar.Be used for voltage is put on the specifically qualification of structure of the device of the coating material that is atomized at this spray gun 2, and can realize with the known devices structure.
As shown in Figure 2, electrostatic field (electromagnetism line of force m3) is formed between the coated thing 9 that voltage is applied thereto the coating material of this atomizing and ground connection.The coating material of this atomizing electromagnetism line of force m3 along this electrostatic field when trying hard to recommend of the shaping air that is blown out by the air spray orifice since this shaping air ring 21 is moving flies.
Still as shown in Figure 3, a plurality of needle electrodes 23 with radial taper end are arranged on this shaping air ring 21 in the mode of stretching to radial outside from this shaping air ring 21.All needle electrodes have same structure, therefore for easy may the time below only relate to single needle electrode form.
In addition, the length that makes needle electrode 23 is shorter during with low speed rotation at bell-jar 22, and longer when rotating at a high speed at bell-jar 22, this can prevent that the coating material spraying from adhering to, and does not hinder the jet mode of this coating material that sprays from this spray gun 2.
Also have, perpendicular to the needle electrode that axially stretches out 23 of this main casing 20, this needle electrode also can be arranged to make its (towards this bell-jar 22) or (leave this bell-jar 22) backward and tilt forward except as shown in Figure 3.Also have, as to being arranged on a kind of selection of the needle electrode on the shaping air ring 21, it also can be arranged to stretch out from the neighboring of this main casing 20.
In addition, the electromagnetism line of force m4 that leaves this shaping air ring 21 (being spray gun 2) extension is formed by this needle electrode 23, as shown in Figure 2.This electromagnetism line of force m4 forms the electric field potential barrier around this spray gun 2, and this potential barrier is repelled this coating material spraying and the coated material spraying is repelled.In addition, as shown in Figure 3, the voltage that puts on this needle electrode 23 is reverse voltage, promptly with the voltage that puts on this first arm 3a, is about the 90kv DC voltage, has identical polar.
And, as shown in Figure 5, make the end of this needle electrode 23 become wedge angle, be effective for forming high-tension electricity magnetic line of force m4.The end of wedge angle also can form highfield.Therefore, the shape of needle electrode 23 ends specifically is not defined in taper.That is, the end of needle electrode 23 can be another kind of shape, as long as it is that wedge angle (that is, having sharp-pointed edge) gets final product.Therefore, this end can form and be divided into a plurality of cusps.
And as shown in Figure 3, the DC voltage that is about 90kv puts on the coating material of atomizing at the bell-jar 22 near position I.The DC voltage that is about 90kv puts on this needle electrode 23 equally at same position.Also have, the DC voltage that is about 50kv puts on the position II of this first arm of formation 3a and the zone between the III.
And, as shown in Figure 3, the main casing 20 of spray gun 2 be connected cylinder 2a by having manufacturing such as high-resistance resin, voltage drop as a result (approaching zero) is away from position I.For example, near the DC voltage that is about 90kv needle electrode 23 puts on and is connecting cylinder 2a, and when the II of approximated position, voltage is reduced to 70kv to 60kv from 80kv, applies the DC voltage that is about 50kv during with convenient in-position II.
And as shown in Figure 3, the DC voltage that is about 50kv puts on the second arm 3b of the borderline position III between the close second arm 3b and the first arm 3a.This voltage reduces to zero near the borderline position IV between the second arm 3b and the 3rd arm 3c then.
And, as shown in Figure 1 voltage is imported the high-tension cable 6a of this spray gun 2 and the high-tension cable 6b that voltage is imported the first arm 3a is connected to branch other voltage generator 5a and 5b as they power supplys separately.That is, the power supply (being high-voltage generator 5b) that applies a voltage to the power supply (being high-voltage generator 5a) of spray gun 2 (being needle electrode 23) and apply a voltage to the first arm 3a (being needle electrode 8a) is other power supply of branch.
Therefore, can set separately from the magnitude of voltage of each high- tension cable 6a and 6b input, so import the value that each position I can be arranged to wish to the voltage of III.Make at position I and can set by this way to the magnitude of voltage of III input, the coherent condition that makes magnitude of voltage to be sprayed on spray gun 2 and the robots arm 3 according to the suspended state and the coating material of coating material spraying is suitably regulated, and therefore reduces effectively and pollutes.And the zone that voltage applies thereon also can be according to the length setting of the first arm 3a and the second arm 3b, and this also reduces pollution effectively.
Also have, as shown in Figure 3, the main casing 20 of spray gun 2 and the surface that is connected cylinder 2a are by having high-resistance resin manufacture, so voltage reduces (approaching zero) gradually from needle electrode 23.On the other hand, the voltage of substantial constant also can put on main casing 20 and be connected cylinder 2a by its surface being applied metal coating.Therefore, according to this main casing 20 and the surfacing (being resin or metal) that is connected cylinder 2a etc., can set the voltage that puts on each part and distribute.Therefore, be sprayed at coherent condition option table flooring suitably on spray gun 2 and the robots arm 3 according to the suspended state of coating material spraying and coating material, thereby prevent from effectively to pollute.
Said structure also can obtain following effect.At first as shown in Figure 1 to Figure 3, the electric field that forms between the coated object 9 of the coating material that sprays from spray gun 2 by the spray gun 2 that is applied thereto at negative high-voltage and ground connection is applied on the coated object 9.The same with spray gun 2, negative high-voltage also is applied on the needle electrode 23, so electrostatic field also is formed on around this needle electrode 23.The result, be suspended near this needle electrode 23 (shaping air ring 21) coating material spraying by repulsion statically and shift coated thing 9 one sides onto, so not only prevent main casing 20 that it adheres to this spray gun 2 and be connected cylinder 2a, prevent that also it from adhering to robots arm 3.
In addition, the same with spray gun 2 as shown in Figure 1 to Figure 3, negative high-voltage also puts on the first arm 3a, so electrostatic field also is formed on around this first arm 3a.The result is suspended near this first arm 3a coating material spraying by repulsion statically and shift coated thing 9 one sides onto, prevents that like this it from adhering to this robots arm's 3 the first arm 3a.And by this way, the electric field potential barrier is formed on by electromagnetism line of force m1 and m2 around this first arm 3a, and the coating material that this electric field potential barrier repulsion negative voltage has been applied thereto is sprayed and repelled (Fig. 2) by this coating material spraying.This electric field potential barrier prevents that the coating material spraying from adhering to the first arm 3a.
Also have, in electrostatic coating equipment 1 shown in Figure 1, spray gun 2 (being needle electrode 23) is applied the power supply (being high-voltage generator 5a) of voltage and is other power supply of branch to the power supply (being high pressure generator 5b) that the first arm 3a (being needle electrode 8a) applies voltage, so can in each high pressure generator 5a and 5b, provide safety circuit.As a result, even if take place unusually in one (for example spray gun 2), for example, if excessive electric current flows through in one (for example spray gun 2), voltage also can continue to supply with another (for example first arm 3a).
Also can be from public high-voltage generator to the spray gun 2 and the first arm 3a service voltage.In this case, if necessary, the safety circuit that is used for two systems can be arranged on a high-voltage generator.Therefore, even if take place unusually in one, as mentioned above, voltage can continue to supply with another.
Also have, not only produce electromagnetic force,, and radially produce electromagnetic force in fact by the static board in the relevant electrostatic coating equipment in front surface one side (side that promptly has coated object).Therefore, even if robots arm's fast moving, coating material spraying is by repulsion statically, therefore reduces by coating material to adhere to the robots arm and the pollution that causes.In addition, owing to there is not static board, moving unlike in fact when static board is set of robots arm hindered (that is to say static board and coating operation interference).The result can improve the speed that the free degree that the robots arm moves and spray gun 2 move.
Also have, as shown in Figure 2, needle electrode 23, needle electrode 8a and the first arm 3a are applied high voltage form electrostatic field (forming electromagnetism line of force m1, m2 and the m4 that radially extends from each position) in very wide zone.Therefore, even if spraying coating material spray gun 2 fast moving afterwards, the coating material spraying of suspension also can be formed on the electric field in this very wide zone and push coated object 9 to.As a result, prevent that the coating material spraying from adhering to robots arm 3 etc., therefore can reduce pollution.
Also have, this electrostatic field forms the electric field potential barrier of repelling this coating material spraying and being repelled by this coating material spraying on every side at spray gun 2 and robots arm 3 (i.e. the first arm 3a).Even if during the fast moving spray gun, this electric field potential barrier can prevent that also the coating material spraying from adhering on spray gun 2 grades after spraying coating material.
In addition, as mentioned above, this exemplary embodiment is to be used to reduce the method that the coating material of electrostatic coating equipment pollutes, this electrostatic coating equipment comprises the robots arm 3 that coating material is ejected into the spray gun 2 on the coated object 9 and moves this spray gun 2 with respect to this coated object 9, and it is configured to the coating material in this spray gun 2 (being the coating material spraying) is applied voltage.This be used to reduce apply the method for polluting and prevent that by the voltage that robots arm 3 is applied and puts on the voltage same polarity of coating material coating material from adhering to this robots arm 3 (i.e. the first arm 3a).According to this method, can reduce the coating of not taking concrete anti-coating to pollute the robots arm 3 self of measure and pollute.As a result, also can reduce the number of times that robots arm 3 needs cleaning.In addition, also can reduce the coating problem that the coating material by the adhesion of dripping causes, therefore can improve coating quality.
Though reference example embodiment has described the present invention, should be appreciated that to the invention is not restricted to this exemplary embodiment or structure.In addition, though, comprise that various combinations more or less or only discrete component and structure also belong in spiritual essence of the present invention and the scope at the various exemplary element of exemplary embodiment shown in each embodiment and the structure.
Claims (13)
1. electrostatic coating equipment, it has coating material is ejected into spray gun (2) on the coated object (9), with the robots arm (3) who moves this spray gun (2) with respect to this coated object (9), and this equipment is configured to the coating material in this spray gun (2) is applied voltage, it is characterized in that:
This robots arm (3) comprises first arm (3a) and second arm (3b), go up this spray gun (2) at this first arm (3a) and be installed in an end, this second arm (3b) is connected in the other end of this first arm (3a) and the electrical connection between this first arm (3a) and ground connection side is insulated an end; And put on the surface of this first arm (3a) with the voltage of the voltage identical polar that puts on this coating material.
2. electrostatic coating equipment as claimed in claim 1, wherein this second arm (3b) is made of the parts with electrical insulation property.
3. electrostatic coating equipment as claimed in claim 1 or 2, wherein this second arm (3b) is made of resin piece.
4. electrostatic coating equipment as claimed in claim 1 or 2, wherein
First electrostatic attraction electrode (8) that is applied thereto with the voltage of the voltage identical polar that puts on this coating material is arranged on the neighboring of this first arm (3a).
5. electrostatic coating equipment as claimed in claim 4, wherein
First needle electrode (8a) that is applied thereto with the voltage of the voltage identical polar that puts on this coating material saliently is arranged on this first electrostatic attraction electrode (8).
6. electrostatic coating equipment as claimed in claim 4, wherein
This first electrostatic attraction electrode (8) is the annular electrode that forms with annular shape, wherein about this first arm (3a) angular end portion of sectional tool (8b) longitudinally.
7. as any one described electrostatic coating equipment in the claim 1 to 2, wherein
Second electrostatic attraction electrode (23) that is applied thereto with the voltage of the voltage identical polar that puts on this coating material is arranged on the neighboring of this spray gun (2).
8. electrostatic coating equipment as claimed in claim 7, wherein
This second electrostatic attraction electrode (23) is second needle electrode.
9. electrostatic coating equipment as claimed in claim 8, wherein
The length of this second needle electrode is according to the rotary speed setting of bell-jar (22), and this bell-jar (22) is driven and makes this coating material atomizing in rotatable mode.
10. as any one described electrostatic coating equipment in the claim 1 to 2, wherein
This spray gun (2) is applied first power supply (7a) of voltage and (30 second sources (7b) that apply voltage are power supplys separately to this robots arm.
11. electrostatic coating equipment as claimed in claim 10, wherein
The voltage that this first power supply (7a) and second source (7b) output voltage values independently are provided with.
12. method that the coating that is used to reduce electrostatic coating equipment is polluted, this coating equipment has coating material is ejected into spray gun (2) on the coated object (9), with the robots arm (3) who moves this spray gun (2) with respect to this coated object (9), and this equipment is configured to the coating material in this spray gun (2) is applied voltage
This robots arm (3) comprises first arm (3a) and second arm (3b), go up this spray gun (2) at this first arm (3a) and be installed in an end, this second arm (3b) is connected in the other end of this first arm (3a) and the electrical connection between this first arm (3a) and ground connection side is insulated an end
Described method comprises the steps:
To put on the surface of this first arm (3a) with the voltage of the voltage identical polar that puts on this coating material.
13. the method that the coating of minimizing electrostatic coating equipment as claimed in claim 12 is polluted also comprises the steps:
To put on the electrostatic attraction electrode (23) that is arranged on this spray gun (2) neighboring with the voltage of the voltage identical polar that puts on this coating material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005260022A JP4645375B2 (en) | 2005-09-08 | 2005-09-08 | Electrostatic coating equipment |
| JP2005260022 | 2005-09-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1927471A CN1927471A (en) | 2007-03-14 |
| CN100467135C true CN100467135C (en) | 2009-03-11 |
Family
ID=37857698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101290740A Expired - Fee Related CN100467135C (en) | 2005-09-08 | 2006-09-08 | Static coating device and method for reducing coating pollution of static coating device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4645375B2 (en) |
| CN (1) | CN100467135C (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4645375B2 (en) * | 2005-09-08 | 2011-03-09 | トヨタ自動車株式会社 | Electrostatic coating equipment |
| JP4769762B2 (en) * | 2007-05-18 | 2011-09-07 | トヨタ自動車株式会社 | Anti-stain cover for coating machines |
| JP2009034565A (en) * | 2007-07-31 | 2009-02-19 | Toyota Motor Corp | Electrostatic coater and electrostatic coating method |
| JP4967903B2 (en) | 2007-07-31 | 2012-07-04 | トヨタ自動車株式会社 | Electrostatic coating apparatus and electrostatic coating method |
| CN101821017B (en) * | 2007-08-10 | 2013-04-24 | 范努克机器人技术美国有限公司 | Improved robotic apparatus and method for painting |
| JP4456147B2 (en) * | 2007-11-02 | 2010-04-28 | トヨタ自動車株式会社 | Electrostatic coating equipment |
| US20110104385A1 (en) * | 2008-07-04 | 2011-05-05 | Abb Research Ltd. | Apparatus for electrostatically coating a workpiece and method of reducing contamination thereof |
| JP5474504B2 (en) * | 2009-11-18 | 2014-04-16 | トヨタ自動車株式会社 | Electrostatic coating apparatus and method for preventing paint contamination of electrostatic coating apparatus |
| JP2012050949A (en) | 2010-09-02 | 2012-03-15 | Toyota Motor Corp | Electrostatic coating apparatus |
| FR3004661B1 (en) * | 2013-04-22 | 2017-06-02 | Sames Tech | LIQUID COATING PRODUCT ELECTROSTATIC PROJECTOR AND PROJECTION INSTALLATION COMPRISING SUCH A PROJECTOR |
| CN113853252A (en) * | 2019-03-25 | 2021-12-28 | 卡莱流体技术有限公司 | Electrostatic coating system and method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1157590A (en) * | 1997-08-26 | 1999-03-02 | Kansai Paint Co Ltd | Method of coating automobile sash |
| JPH11104555A (en) * | 1997-09-30 | 1999-04-20 | Kansai Paint Co Ltd | Coating of automobile sash |
| JP4578908B2 (en) * | 2004-09-17 | 2010-11-10 | トヨタ自動車株式会社 | Electrostatic coating equipment |
| JP4645375B2 (en) * | 2005-09-08 | 2011-03-09 | トヨタ自動車株式会社 | Electrostatic coating equipment |
-
2005
- 2005-09-08 JP JP2005260022A patent/JP4645375B2/en active Active
-
2006
- 2006-09-08 CN CNB2006101290740A patent/CN100467135C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP4645375B2 (en) | 2011-03-09 |
| CN1927471A (en) | 2007-03-14 |
| JP2007069136A (en) | 2007-03-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100467135C (en) | Static coating device and method for reducing coating pollution of static coating device | |
| US7966967B2 (en) | Electrostatic coating system | |
| US4215818A (en) | Induction charging electrostatic spraying device and method | |
| CN101132861B (en) | Electrostatic coating apparatus | |
| US4765539A (en) | Electrostatic spraying apparatus | |
| US4221339A (en) | Liquid spraying device | |
| US20060081729A1 (en) | Electrostatic spraying apparatus | |
| CA1202778A (en) | Electrodynamic painting system and method | |
| KR880010829A (en) | Electrostatic coating equipment | |
| US5154358A (en) | Repulsion device for low capacitance electrostatic painting systems | |
| KR102308411B1 (en) | Electrostatic spray device for spraying a liquid coating product, and spray facility comprising such a spray device | |
| JP5474504B2 (en) | Electrostatic coating apparatus and method for preventing paint contamination of electrostatic coating apparatus | |
| JP2011255275A (en) | Electrostatic coating apparatus and electrostatic coating method | |
| JP5758590B2 (en) | Electrostatic coating equipment | |
| EP3737506B1 (en) | Spray nozzle assembly and spray plume shaping method | |
| US5843536A (en) | Coating material dispensing and charging system | |
| US3186864A (en) | Method for electrostatic painting | |
| JP2011104536A (en) | Electrostatic coating device and method for preventing electrostatic coating device from being stained by coating material | |
| JPH04200758A (en) | Grid electrode apparatus of rotary atomizing type electrostatic painting machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090311 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |