CN102639249B - Electrostatic coating machine employing removable paint cartridge - Google Patents
Electrostatic coating machine employing removable paint cartridge Download PDFInfo
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- CN102639249B CN102639249B CN201080042982.0A CN201080042982A CN102639249B CN 102639249 B CN102639249 B CN 102639249B CN 201080042982 A CN201080042982 A CN 201080042982A CN 102639249 B CN102639249 B CN 102639249B
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- coating
- cylinder
- main body
- machine main
- bag
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Classifications
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- 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
- B05B5/16—Arrangements for supplying liquids or other fluent material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet
- B05B12/1463—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet separate containers for different materials to be sprayed being moved from a first location, e.g. a filling station, where they are fluidically disconnected from the spraying apparatus, to a second location, generally close to the spraying apparatus, where they are fluidically connected to the latter
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
Landscapes
- Electrostatic Spraying Apparatus (AREA)
- Spray Control Apparatus (AREA)
Abstract
Provided is an electrostatic coating machine employing a removable paint cartridge, which enable one to clean the paint flow path including coupling parts between the main body of the coating machine and a paint cartridge, with the said coupling parts including the paint outlet of the paint cartridge. The paint cartridge (10) has a stepped sleeve (300) projecting downward from the bottom face thereof and being displaceable up and down. The stepped sleeve (300) has a valve seat (302) for a first check valve (30) formed at the lower end thereof. A movable valve body (304) to fit to the valve seat (302) is energized by an inner peripheral spring (306) in the direction for fitting to the valve seat (302). A hollow (40) of the main body (6) of the coating machine has a secondary hollow (402) for fitting of a smaller-diameter part (300a) of the stepped sleeve (300). At the center of the bottom face of the secondary hollow (402), is opened a paint feeding channel (44).
Description
Technical field
The present invention relates in general to a kind of electrostatic atomizer, more specifically, relates to a kind of electrostatic atomizer comprising the coating cylinder that can install and remove.
Background technology
As the electrostatic atomizer being suitable for the conductive coating paint such as water paint, metallic paint, the electrostatic atomizer of known a kind of coating cartridge type.Coating cartridge type electrostatic atomizer has the coating cylinder that can be installed on coating machine main body with installing and removing, and uses the conductive coating paint being contained in this coating cylinder to carry out the application of body of a motor car etc.Coating cartridge type electrostatic atomizer has and can cut off high voltage and leak such advantage towards the outside via conductive coating paint.
Substantially be divided into the rotary-atomizing formula coating machine and injecting type coating machine that comprise rotary atomization head (so-called " bell-jar ") from the conventional electrostatic coating machine of outside coating source supply coating, but the coating machine that coating cylinder is applicable to these two kinds of modes is natural.
Although coating cylinder is also referred to as coating material cartridge or container for paint unit, but when substantially distinguishing, first can be categorized as the piston type (patent document 1 ~ 3) extruding coating with piston, and second can be categorized as towards coating bag applying pressure to flatten the coating packet mode (patent document 4 ~ 7) extruding coating in coating Bao Ercong coating bag.
Specifically, the piston type coating cylinder of patent document 1 ~ 3 has the coating reception room that marked by piston and clips piston and is in the work liquid chamber with coating reception room opposite side, by pressing down piston towards work liquid chamber supply working solution non-conductive liquids such as (typically) diluents, thus extruded from coating cylinder by the coating of coating reception room, and this coating is supplied to bell-jar via carrier pipe.Coating cylinder due to patent document 1 ~ 3 has the carrier pipe that can insert coating machine main body, therefore, also can be called the coating cylinder of band carrier pipe.
As mentioned above, patent document 4 discloses the coating cylinder comprising the coating bag forming coating reception room, and the coating cylinder of this patent document 4 comprises the carrier pipe that can insert coating machine main body.Therefore, coating cylinder disclosed in this patent document 4 also can be called the coating cylinder of band carrier pipe.Patent document 4 discloses two kinds of methods as the method for flattening coating bag.One of them method is the surrounding's supply working solution use this working solution directly to apply pressure to flatten the method for coating bag towards coating bag towards coating bag.Another method is following methods: prepare adjacent with coating bag and form the working solution bag of work liquid chamber, expand, use the working solution bag of this expansion to apply pressure towards coating bag towards this working solution bag supply working solution to make working solution bag, thus flattening coating bag.
Patent document 5 proposes following scheme in the coating cylinder comprising coating bag and working solution bag: the contact surface between coating bag and working solution bag is connected to each other, to prevent the Relative Displacement between coating bag and working solution bag.In addition, this patent document 5 also proposed following scheme: use the 3rd liquid is full of the gap between coating bag and working solution bag.
Patent document 6 proposes a kind of outside housing by producing the coating cylinder comprising coating bag with transparent rigid plastics and nylon resin thus can observe the coating cylinder of inner case.In addition, this patent document 6 discloses coating bag and is also made up of transparent resin.
Patent document 7 discloses the packet mode coating cylinder not having carrier pipe.This packet mode coating cylinder has the sleeve of the coating material outlet port forming coating cylinder, and in this sleeve, be provided with the check valve be made up of ball valve (movable valve).Coating machine main body for the installing of this coating cylinder has the slide (shutter) upstream extremity of the coating path in this coating machine main body being opened closedown.In addition, coating machine main body has the detergent remover supply passageway of the supply from external reception detergent remover, when slide is in the state of cut out, above-mentioned detergent remover supply passageway by the connecting path (being called " slide path ") formed by this slide with above-mentioned coating communication.
Open and close valve has been clamped in the midway of detergent remover supply passageway.This open and close valve and above-mentioned slide mechanically link.When slide is opened, close open and close valve, when slide cuts out, open open and close valve.When packet mode coating cylinder is installed in coating machine main body, slide is opened, the coating communication in the coating material outlet end of cylinder and coating machine main body.By this, coating can be supplied to coating machine main body from cylinder (coating bag).When coating cylinder becomes empty, when being unloaded from coating machine main body by coating cylinder, slide cuts out, and in addition, opens detergent remover open and close valve linkedly with the closing motion of this slide.As mentioned above, form slide path by the slide of closed condition, make detergent remover supply passageway and coating communication by this slide path.Under the state unloaded by coating cylinder, when detergent remover to be supplied to coating machine main body (detergent remover supply passageway) from outside, this detergent remover can be utilized to make the coating path in coating machine main body become clean.
As the method using working solution to extrude coating, the membrane pump recorded in known patent document 8.The membrane pump of this patent document 8 does not relate to coating cylinder.But the housing of membrane pump has the coating material port at one end opening and the working solution port at its other end opening, the inside of housing is divided into coating reception room and work liquid chamber by retractable film.By working solution is supplied to work liquid chamber via working solution port, thus the coating being filled in coating reception room is flowed out via coating material port, the coating after outflow is supplied to electrostatic atomizer.Therefore, the principle of the membrane pump of patent document 8 can be applicable to coating cylinder.
It is limited for installing and removing the coating content that the coating cylinder in coating machine main body can accommodate.Therefore, at the end of the application of a such as body of a motor car, the replacing of coating cylinder to be carried out in order to the next body of a motor car of application.
The coating cylinder that patent document 9 discloses a kind of paint robot to comprising electrostatic atomizer changes relevant technology.Specifically, at the end of the application of a body of a motor car, in coating cylinder change station, the coating cylinder used is unloaded from coating machine main body, then, new coating cylinder is installed on coating machine main body.That is, the replacing of coating cylinder is carried out.Then, when paint robot is carrying out the application of body of a motor car, in coating cylinder change station, carry out the operation of filling paint in the coating cylinder used, and store the coating cylinder after filling paint for recycling.
About being filled in by coating in empty coating cylinder with recycling, in coating cylinder in the form of piston, in fact color replacement will be carried out.That is, although coating cylinder in the form of piston also fills the coating of same color sometimes, as described in detail in patent document 1,2, also sometimes the inside (coating reception room) of coating cylinder is cleaned with the coating of filling other color.Namely so-called color replacement is carried out.In the coating cylinder disclosed in patent document 1, this coating cylinder clean first piston is pressed to the most position slightly before, deep than coating reception room, and the coating that will be contained in coating cylinder is discharged.Why piston not being pressed to most deep and making piston stop at its position is slightly before due to following cause: when piston being pressed to the diapire in the most deep of coating reception room and coating reception room, even if make detergent remover enter in coating reception room, detergent remover can not be made in the internal flow of this coating reception room.(paragraph 0153 of the description of patent document 1)
In this condition, namely piston is being positioned under the state than most position slightly before, deep, detergent remover is supplied to coating reception room via the detergent remover supply port of the diapire opening at coating reception room, this detergent remover, after namely coating reception room is located in the internal flow of the coating reception room of the piston restriction than most position slightly before, deep, is discharged to outside via carrier pipe.
Patent document 2 is about the clean problem points indicating the coating cylinder of above-mentioned patent document 1 of piston type coating cylinder.As mentioned above, patent document 1 proposes following scheme: piston is positioned the position more forward than most deep, the inside of the coating reception room limited by this piston is cleaned, but as its problem, patent document 2 is pointed out: in the method for this patent document 1, the flowing being supplied to the detergent remover of coating reception room via the detergent remover supply port bottom coating cylinder becomes turbulent flow, thus can not clean the inside of coating reception room equably.According to patent document 2, indicate following problem especially: be difficult to the coating in the gap entered between the side of piston and the sidewall of coating reception room to be washed off, and need spended time for washing this coating off.In addition, be solve the problem of patent document 1, patent document 2 proposes following scheme: form at the diapire of coating reception room the groove that the central part towards this diapire radially extends.
Prior art document
Patent document
Patent document 1: Japanese Patent Laid-Open 2002-11396 publication
Patent document 2: Japanese Patent Laid-Open 2004-42036 publication
Patent document 3: Japanese Patent Laid-Open 08-229446 publication
Patent document 4: Japanese Patent Laid-Open 2005-87810 publication
Patent document 5: Japanese Patent Laid-Open 2005-296750 publication
Patent document 6: Japanese Patent Laid-Open 2006-347606 publication
Patent document 7: Japanese Patent Laid-Open 2006-334549 publication
Patent document 8: Japan Patent Beneficial 04-87759 publication
Patent document 9: Japanese Patent Laid-Open 2000-317354 publication
Summary of the invention
Invent technical problem to be solved
Coating cartridge type electrostatic atomizer is applied to the application of body of a motor car.In addition, for carrying out the application of body of a motor car and the paint robot that electrostatic atomizer to be installed on arm by flexible Application is well-known.When carrying out the color replacement of electrostatic atomizer, as disclosed in Patent Document 7, cleaning of coating machine main body is carried out.
About the color replacement of coating cylinder, coating cylinder in the form of piston carries out inner cleaning with the coating of filling other color in fact as mentioned above.But in the coating cylinder of packet mode, be only defined in the coating of same color and be reused, when the coating of the coating cylinder unloaded from coating machine main body is the coating of A look, the coating of this A look is filled in coating cylinder.
About electrostatic atomizer main body clean be (patent document 7) that carry out under the state having unloaded coating cylinder from coating machine main body as mentioned above.Cleaning of coupling part between coating machine main body and coating cylinder at the Problems existing of cleaning of coating machine main body.In patent document 7, proposing following scheme: slide is set in the upper end of coating machine main body, namely forming the clean path of additivity with the coupling part of coating cylinder by closing this slide in the upper surface of coating machine main body.
But the motion of patent document 7, needs the mechanical mechanism of the mounting or dismounting interlock making slide and coating cylinder, in addition, also needs the sealing etc. guaranteed around slide, the structure of coating machine main body is caused to become complicated.This is the main cause causing the manufacturing cost of coating machine main body to rise.
The object of the present invention is to provide a kind of structure simple and the electrostatic atomizer of band coating cylinder cleaned by the coating path of coating machine main body interiorly of the coating material outlet of the coupling part that can comprise between coating machine main body and coating cylinder and coating cylinder.
The technical scheme that technical solution problem adopts
According to the present invention, above-mentioned technical problem is solved by providing a kind of electrostatic atomizer, this electrostatic atomizer comprises can relative to the coating cylinder of coating machine main body mounting or dismounting, above-mentioned coating machine main body receives and supplies next coating to carry out application to workpiece from above-mentioned coating cylinder, it is characterized in that, above-mentioned coating cylinder comprises: (i) sleeve, and this sleeve forms the outlet of the above-mentioned coating of above-mentioned coating cylinder, and can conjugate in the vertical direction; (ii) the first spring, this first spring exerts a force to above-mentioned sleeve downward; And (iii) coating open and close valve, this coating open and close valve is located at above-mentioned sleeve and closedown is opened in the outlet of above-mentioned coating path, and above-mentioned coating machine main body comprises: (i) recess, and this recess accommodates above-mentioned sleeve; (ii) coating path, this coating path has the opening offered in the bottom surface of above-mentioned recess, and via the coating of this opening accepts from above-mentioned coating cylinder; (iii) detergent remover supply passageway, this detergent remover supply passageway receives the detergent remover from outside, and this detergent remover is guided to the upper end of above-mentioned coating path; And (iv) sealing ring, sealing ring is configured at the bottom surface of above-mentioned recess, and be located at the outer peripheral portion of the upper end open of above-mentioned coating path, when above-mentioned coating cylinder is installed on above-mentioned coating machine main body, the spring force of above-mentioned first spring is utilized to be pressed on above-mentioned sealing ring the lower surface of above-mentioned sleeve.
According to drum electrostatic coating machine of the present invention, when changing color, under the state that coating cylinder is installed on coating machine main body, carry out cleaning of the coating path in coating machine main body.That is, in electrostatic atomizer of the present invention, the coating of coating cylinder is supplied to coating machine main body by the coating material outlet be made up of above-mentioned sleeve.Connecting portion between the upper end open of the outlet of coating cylinder and the coating path of coating machine main body is by above-mentioned seal ring seal.Therefore, can prevent from the connecting portion between the coating Contamination Coatings cylinder and coating machine main body of coating cylinder outflow.In addition, when changing color, after the state being in the coating open and close valve of closing coating cylinder, by detergent remover is directed in coating machine main body from outside, can the detergent remover that enters in coating machine main body be used, near the outlet comprising the coating cylinder limited by sealing ring, make the coating path in coating machine main body become clean interiorly.
In the preferred embodiment of the present invention, the above-mentioned coating open and close valve of coating cylinder by be formed at the fixed valve base of above-mentioned sleeve lower end, dropping place in above-mentioned fixed valve base movable spool, towards above-mentioned fixed valve base, the second spring that above-mentioned movable spool exerts a force is formed.Movable spool is stated by utilizing the push rod advanced from coating machine main body side to push to, thus can this coating open and close valve of positive opening.On the contrary, by making push rod retreat, above-mentioned coating open and close valve can be closed.As variation, also the brake making the above-mentioned coating open and close valve of coating cylinder open cut out can be built in coating cylinder.
Coating cylinder of the present invention is not included in the carrier pipe adopted in existing coating cylinder.Therefore, easily the priming valve be made up of open and close valve is set in the coating path of coating machine main body.The closedown of opening of this priming valve synchronously performs with the sart point in time of application and end time point.Therefore, the beginning of the spraying of the coating of electrostatic atomizer can be made and terminate synchronous with the beginning of coating process and the time point of end.
Electrostatic spraying function of the present invention adopts the coating cylinder of any kind.Specifically, coating cylinder both can be the piston type cylinder utilizing piston to extrude coating, also can be the packet mode cylinder extruding coating by flattening coating bag.In addition, the coating reception room of coating cylinder also can adopt the coating cylinder (membrane pump formula cylinder) being formed coating reception room by retractable film.
Other objects of the present invention and action effect come clear and definite by the explanation of following the preferred embodiment of the present invention.
Accompanying drawing explanation
Fig. 1 is the schematic diagram comprising the electrostatic atomizer of the packet mode coating cylinder of embodiment being installed on paint robot, is the figure of the coating process representing electrostatic atomizer.
Fig. 2 is the front view of the coating bag of the coating cylinder being contained in Fig. 1.
Fig. 3 is the sectional elevation of the bag main body of III-III line along Fig. 2.
Fig. 4 is the sectional elevation of the upper end oral area of IV-IV line along Fig. 2.
Fig. 5 is provided at the details drawing of the check valve of the coating path lower end communicated with the lower end oral area of the coating bag of coating cylinder, shows the state being fixed with coating cylinder in coating machine main body.
Fig. 6 is the figure corresponding to Fig. 5, is represent the figure utilizing the actuator positive opening of the band push rod of coating machine main body side to be located at the state of the check valve of the coating path lower end of coating cylinder.
Fig. 7 is the details drawing of the actuator of band push rod for the check valve positive opening by being located at the working solution supply passageway lower end communicated with the confined space of coating cylinder.
Fig. 8 is the major part enlarged drawing major part of Fig. 7 extracted out, is the figure of the check valve for illustration of the working solution supply passageway that can utilize push rod positive opening coating cylinder.
Fig. 9 is the figure for illustration of the operation cleaned by the coating supply passageway of coating machine main body after the coating being finished coating cylinder, under the state being provided with this coating cylinder.
Figure 10 be for illustration of after the clean end of coating machine main body, the coating cylinder of the sky after unloading from coating machine main body be fixed on coating bag clean the assigned position at station with the figure of the operation of clean coating bag inside.
Figure 11 be for illustration of after coating cylinder is cleaned, coating is filled in the figure of the operation in coating bag.
Figure 12 is the figure of the variation of method of cleaning for illustration of coating cylinder, in addition, or the figure of the variation for illustration of coating bag.
Figure 13 is the figure comprising the method for cleaning of the coating cylinder of working solution bag that can be suitable for for illustration of the present invention.
Figure 14 is the figure comprising another method of cleaning of the coating cylinder of working solution bag that can be suitable for for illustration of the present invention.
Figure 15 is the figure for illustration of also the present invention being applicable to clean piston type coating cylinder.
Detailed description of the invention
Embodiment
Below, with reference to the accompanying drawings the preferred embodiments of the present invention are described.Fig. 1 is the figure for being described the summary of the electrostatic atomizer being installed on paint robot.In FIG, reference marks 1 represents the arm of paint robot, is provided with electrostatic atomizer 2 in the front end of robots arm 1.Electrostatic atomizer 2 shows the rotary-atomizing formula coating machine comprising bell-jar (Japanese: ベ Le カ Star プ) 4 as coating nebulising element illustratively, but also the present invention preferably can be applicable to injecting type coating machine.
Electrostatic atomizer 2 is coating machines of coating cylinder (cartridge) formula.Specifically, electrostatic atomizer 2 has: the coating machine main body 6 being fixed on robots arm 1 front end; And the upper surface being installed in coating machine main body 6 namely with the coating cylinder 10 on the surface of bell-jar 4 opposite side.This coating cylinder 10 can be installed and removed relative to coating machine main body 6.
Coating cylinder 10 has the coating bag 12 of the coating reception room being configured for filling paint.Flattening coating bag 12 by applying pressure from outside to this coating bag 12, forcibly to reduce the volume of the coating reception room formed by this coating bag 12, thus the coating of coating bag 12 can be supplied to coating machine main body 6.
Coating cylinder 10 has the confined space 14 of being accommodated by coating bag 12, and this confined space 14 is formed by overcoat 16.It is preferable that, overcoat 16 is made up of transparent or semitransparent hard material, is typically made up of transparent or semitransparent plastic material.
This coating cylinder 10 utilizes working solution directly to execute the cylinder of stressed mode to coating bag 12.Thus, the surrounding of coating bag 12 is full of working solution.Working solution preferably adopts the liquid of insulating properties, typically uses insulating properties diluent as working solution.Be undesirable owing to being mixed into air in the working solution in the confined space 14 forming work liquid chamber, therefore, in order to catch the air in confined space 14, the airtrapping portion 14a comprising convex form at the top of confined space 14 is ideal.
Fig. 2 is the front view of coating bag 12.Coating bag 12 is the soft plastics drip moldings of the tubular opened wide up and down.When being described particularly with reference to Fig. 2, coating bag 12 has: the bag main body 12a of the tubular extended in the vertical direction; The upper end oral area 12b extended upward from the upper end of this bag main body 12a; And the lower end oral area 12c to extend downward from the lower end of bag main body 12a.That is, coating bag 12 is opened wide up and down by oral area 12b, 12c of upper end and lower end.In this coating bag 12, upper end oral area 12b and lower end oral area 12c is fixed on coating cylinder 10, and the working solution that bag main body 12a is supplied to confined space 14 transversely flattens.The bag main body 12a of coating bag 12 is shaped to the shape of the angle part smooth curved between upper end oral area 12b and lower end oral area 12c.
But the coating bag implemented now is made by the sheet material thermal welding of the softness making two panels thinner, and can think, the inner surface of coating bag easily adheres to coating, in addition, coating content in coating bag is remained in also without any consideration to doing one's utmost to reduce.Can think thus, for existing packet mode coating cylinder, the coating only staying in filling same color is recycled such consideration, completely does not carry out cleaning to the inside of coating bag being recycled such idea,
The coating bag 12 of embodiment is the drip molding be made up of pliability synthetic resin material using finishing die to produce, and the inner surface of coating bag 12 is made up of seamless and level and smooth face.In the coating bag 12 of this embodiment, adopt low molecular polyethylene as its material, this is due in order to produce thin-walled by blow molding and the bag of softness, and preferred material is low molecular polyethylene.Low molecular polyethylene has the resin material cleaning the inside of coating bag 12 to recycle the durability several times needed for coating bag 12.
Certainly, the material of coating bag 12 and manufacturing process are not limited to above-mentioned low molecular polyethylene, blow molding.In order to the inside of coating bag 12 being cleaned and the amount of the coating discarded time clean being reduced to the limit, it is preferable that, the characteristic as coating bag 12 has (1) inner surface that at least flexibility of the appropriateness of bag main body 12a, the inner surface of (2) water proofing property, (3) are seamless and level and smooth.Therefore, as long as meet above-mentioned condition, manufacturing process, the resin material of coating bag 12 just at random can be selected.In addition, also water proofing property, seamless and flatness is given by processing to the inner surface of coating bag 12 to the inner surface of coating bag 12.Such as, the FEP of nylon resin, fluorine type resin is the resin material of chemical resistance, self lubricity excellence, and these resins also can be used to make coating bag 12.In addition, such as, the inner surface of FEP Material coating coating bag 12 can also be used.Illustratively can list painting method, coating method, resin evaporation coating method as the method for the inner surface treatment of coating bag 12.In addition, by being impregnated into by coating bag 12 in the liquid of suitable resin material, also coat can be formed on the inner surface of coating bag 12.
As mentioned above, the coating bag 12 of Fig. 2 becomes the design carrying out to extrude from lower end oral area 12c coating by flattening bag main body 12a in the horizontal.If the crush characteristics of this bag main body 12a need be improved, then as shown in the double dot dash line of Fig. 2, Fig. 4, also can be integrally formed the rib 12d of the single or multiple lengthwises extended along its long side direction on bag main body 12a.
In the coating bag 12 forming coating reception room, it is preferable that, at least bag main body 12a is transparent or semitransparent.If bag main body 12a is transparent or semitransparent, then existing can from outside by the advantage that the loading of the painting color visual confirmation bag main body 12a, coating is such.In addition, easily find that coating bag 12 damages and makes coating spill such situation.The prerequisite of this advantage is the overcoat 16 of formation work liquid chamber (confined space 14) is transparent or semitransparent.
Fig. 3 shows the shape of cross section of main body 12a, and Fig. 4 shows the shape of cross section of upper end oral area 12b.Upper end oral area 12b is that cross section is circular, although not shown but lower end oral area 12c also has the shape of cross section circle in the same manner.Above-mentioned upper end oral area 12b and lower end oral area 12c is fixed on coating cylinder 10.
Be back to Fig. 1, coating cylinder 10 has the first ~ four these four internal paths 20,22,24,26.First internal path 20 is the coating paths be communicated with the lower end oral area 12c of coating bag 12.Second internal path 22 is the working solution supply passageways be communicated with the lower end of the confined space 14 of the work of formation liquid chamber.3rd internal path 24 is the detergent remover supply passageways be communicated with the upper end oral area 12b of coating bag 12.4th internal path 26 is the working solution drain passageways be communicated with the upper end of confined space 14 (airtrapping portion 14a).
First ~ four internal path 20 ~ 26 is at the lower surface opening of coating cylinder 10.The lower surface of coating cylinder 10 is formed in the contact surface contacted with coating machine main body 6 when this coating cylinder 10 being installed in coating machine main body 6.
First ~ four internal path 20 ~ 26 is assembled with check-valves 30,32,34,36 respectively that work as open and close valve.In FIG, the first ~ four check-valves 30 ~ 36 is illustrated in the position leaving coating cylinder 10 lower surface, but this is based on the reason in mapping, the in fact adjacent configuration of lower surface of the first ~ four check-valves 30,32,34,36 and coating cylinder 10.The first ~ four check-valves 30 ~ 36 worked as open and close valve is formed by fixed valve base with by the movable spool that spring exerts a force.Because such check-valves is well-known at present, therefore, omit its detailed description, but the first check-valves 30 of the first internal path (coating path) 20 adopts specially designed check-valves.Later, with reference to Fig. 5, Fig. 6, the first check-valves 30 is described in detail.
Then, with reference to Fig. 1, coating machine main body 6 and robots arm 1 are described.In the upper surface of coating machine main body 6, namely with on the surface of bell-jar 4 opposite side be formed with recess 40, utilize this recess 40 to receive coating cylinder 10.When coating cylinder 10 is contained in recess 40, utilize the locking mechanism 42 of the action because of air that coating cylinder 10 is fixed on coating machine main body 6.
Coating machine main body 6 has the coating supply passageway 44 coating received from coating cylinder 10 being supplied to bell-jar 4, and this coating supply passageway 44 has clamped priming valve 46.This priming valve 46 is made up of the open and close valve utilizing pilot air to carry out opening closing motion.In the drawings, reference marks 48 is air motors, utilizes this air motor 48 to drive bell-jar to rotate.
Japanese Patent Laid-Open 11-262699 publication discloses a kind of piston type coating cylinder identical with patent document 1 ~ 3, in addition, also discloses a kind of coating cylinder with carrier pipe.In Fig. 5 of this Japanese Patent Laid-Open 11-262699 publication, illustrate the details front end of carrier pipe (lower end) opening being opened the valve system of closedown.Although the valve system of the front end of carrier pipe (lower end) is equivalent to above-mentioned priming valve 46, but the valve system of Japanese Patent Laid-Open 11-262699 publication makes the piston rod of the cylinder being built in coating machine main body insert from the upstream extremity of carrier pipe, and makes piston rod extend in the total length of this carrier pipe.In addition, needle valve mechanism is formed by the leading section (bottom) of piston rod and the leading section (bottom) of carrier pipe.This needle valve mechanism is corresponding with the above-mentioned priming valve 46 comprised in the embodiment of the present application.
On the other hand, in the embodiment of the present application, owing to have employed the coating cylinder 10 not having carrier pipe, therefore, the simple structure that the priming valve 46 that only clamps air driven on the coating supply passageway 44 of coating machine main body 6 can be adopted such is used as the coating open and close valve of coating machine main body 6 inside.
Coating machine main body 6 has the working solution supply passageway 50 supplying working solution towards coating cylinder 10, and the working solution supply passageway 50 in this coating machine main body communicates with working solution supply passageway 52 in the arm of robots arm 1.
When being described the working solution supply passageway 52 of robots arm 1, in this arm, working solution supply passageway 52 has the pump 56 working solution supplied from working solution source 54 being supplied under stress coating cylinder 10, and this pump 56 is installed in robots arm 1.It is preferable that, pump 56 is the such as gear pumps that can carry out careful flow-control.Supply the working solution come under stress to be supplied to coating cylinder 10 from pump 56 by making to be located at path transfer valve 58 action of robots arm 1 or coating machine main body 6 or to be back to working solution source 54 via current return circuit 60.The working solution in working solution source 54 adopts the liquid (typically insulate diluent) of insulating properties.As variation, also pump 56 can be arranged at the outside of paint robot, instead of be arranged in robots arm 1, and utilize the path transfer valve 58 being built in robots arm 1 or coating machine main body 6 to control the supply of working solution to coating cylinder 10.
On robots arm 1, except said pump 56 (gear pump), be also built-in with high voltage generator 62.The high voltage produced by high voltage generator 62 puts on bell-jar 4.Certainly, high voltage generator 62 also can be made to be built in coating machine main body 6.
In FIG, reference marks 64 represents the path of bleeding being used for the air being mixed into working solution (insulation diluent) to extract out, and this path 64 of bleeding is connected with working solution supply passageway 50 in coating machine main body via by air operated open and close valve 66.By often making open and close valve 66 valve opening, make the working solution of working solution supply passageway 52 in working solution supply passageway 50, arm in coating machine main body be back to working solution source 54, thus the air be mixed in coating machine main body in working solution supply passageway 50, arm in working solution supply passageway 52 can be discharged.
As the aspect that will pay close attention to, coating machine main body 6 has detergent remover supply passageway 70.The upstream extremity of the above-mentioned coating supply passageway 44 of one end in coating machine main body of this detergent remover supply passageway 70, to be namely connected with coating supply passageway 44 with the cylinder collecting position that recess 40 is adjacent.The other end (upstream extremity) lateral opening in the upper end of coating machine main body 6 of the detergent remover supply passageway 70 in this coating machine main body, is configured with the 5th check-valves 72 in this opening portion.5th check-valves 72 is formed by fixed valve base known at present with by the movable spool that spring exerts a force.
As the aspect that second will pay close attention to, coating machine main body 6 and cylinder collecting recess 40 are adjacent to have the actuator 74,76 that two are with push rod, and above-mentioned first actuator 74 and the second actuator 76 are by air driven.The push rod 74a (Fig. 6) of the first actuator 74 to the first check-valves 30 (coating path) generation effect of coating cylinder 10, to make the first check-valves 30 positive opening.The push rod 76a of the second actuator 76, to the second check-valves 32 (working solution supply passageway) generation effect of coating cylinder 10, opens (Fig. 8) to make the second check-valves Final 32 system.
Fig. 5 and Fig. 6 represents the first check-valves 30 of coating cylinder 10.As mentioned above, the first check-valves 30 is clipped on the first internal path 20 passed through for the coating flowed out from coating bag 12.With reference to Fig. 5, Fig. 6, coating cylinder 10 has and is positioned at the position of giving prominence to downward from its lower surface and the sleeve with the level 300 that can conjugate in the vertical direction, is formed with the valve seat 302 of the first check-valves 30 in the lower end of this movable sleeve 300.Dropping place is exerted a force in the movable spool 304 of this valve seat 302 by the direction (below) of inner circumferential spring 306 towards dropping place in valve seat 302.On the other hand, sleeve 300 with the level is exerted a force downward by periphery spring 308.The lower surface of movable spool 304 is formed supporting member 310 outstanding downward, and this supporting member 310 is given prominence to downward from sleeve 300 with the level.The push rod 74a of above-mentioned first actuator 74 pushes away this supporting member 310 above by abutting with above-mentioned supporting member 310, thus can make the first check-valves 30 positive opening (Fig. 6) being used as open and close valve.
The recess 40 of coating machine main body 6 is formed second recess 402 of the namely less right angle portions 300a of end portion for accommodating above-mentioned sleeve with the level 300, and the coating supply passageway 44 of application pusher side is at the core opening of this second recess 402.That is, above-mentioned coating supply passageway 44 is at the core opening of the bottom surface of the second recess 402.In addition, in the bottom surface of this second recess 402, be configured with sealing ring 404 in the periphery of the opening of coating supply passageway 44.
Fig. 5 and Fig. 6 represents the recess 40 that coating cylinder 10 is positioned coating machine main body 6 and utilizes locking member 42 (Fig. 1) coating cylinder 10 to be fixed on the state of coating machine main body 6.What pay close attention to is there is sealing ring 404 between the lower surface of sleeve 300 with the level and the bottom surface of the second recess 402.Because the sleeve with the level 300 of coating cylinder 10 is exerted a force downward by periphery spring 308, therefore, by coating cylinder 10 is fixed on coating machine main body 6, the lower surface of sleeve 300 with the level is made to be in the state being pressed against sealing ring 404.Because the first internal path (coating path) connecting portion between 20 and the coating supply passageway 44 of coating machine main body 6 of coating cylinder 10 is sealed by sealing ring 404, therefore, roundabout cylinder collecting recess 40, second recess 402 to coating machine main body 6 of coating that flows out from coating cylinder 10 can be prevented and pollute the situation of above-mentioned recess 40,402.
Fig. 5 represents that the state of the function of stop valve (Japanese: ス ト Star パ man's cap used in ancient times) given play to by the first check-valves 30 of coating cylinder 10, under the state of this Fig. 5, the function that original check-valves given play to by the first check-valves 30 flows out (cylinder inside courtyard path 20 is closed) from coating cylinder 10 to stop coating.
On the other hand, Fig. 6 represents and utilizes push rod 74a forcibly above to push away the movable spool 304 of the first check-valves 30 forcibly to open the state of the first check-valves 30.As mentioned above, push rod 74a utilizes the first actuator 74 being conjointly arranged at coating machine main body 6 with the first check-valves 30 to carry out action.First actuator 74 is by air driven.Under the positive opening state shown in Fig. 6, due to the movable spool 304 of the first check-valves 30 being used as open and close valve be in lift off a seat 302 state, therefore, the coating of coating bag 12 can flow out (cylinder inside courtyard path 20 open) via cylinder inside courtyard path 20 by coating cylinder 10 from its lower ending opening 12c.
As mentioned above, coating cylinder 10 has the sleeve 300 that can conjugate in the vertical direction.This sleeve 300 forms the exit portion flowed out for the coating formed in the coating bag 12 of coating reception room, is also configured in addition give prominence to downward from the lower surface of coating cylinder 10.In addition, the first check-valves 30 is provided with in the lower end of this sleeve 300.In addition, periphery spring 308 is utilized to exert a force to movable sleeve 300 downward.On the other hand, coating machine main body 6 has second recess 402 of being accommodated by the path part 300a of sleeve 300, the upper end of the application supply passageway 44 of coating machine main body 6, at the core opening of the bottom surface of this second recess 402, is configured with sealing ring 404 around this opening.
When coating cylinder 10 is assembled to coating machine main body 6, the lower surface of the movable sleeve 300 (path part 300a) exerted a force by spring and sealing ring 404 face contact, by this, the pigment transfer path formed between the sleeve 300 of the coating material outlet of coating cylinder 10 and the coating supply passageway 44 of coating machine main body 6 is in the state sealed by sealing ring 404.By this, can prevent the coating flowed out from coating cylinder 10 from polluting the wall etc. of the second recess 402.
According to said structure, under the state being provided with coating cylinder 10, the coating supply passageway 44 of coating machine main body 6 can be cleaned.This advantage is not limited to the packet mode coating cylinder 10 of embodiment, adopting disclosed in piston type coating cylinder known at present and patent document 7 is also identical in the coating cylinder of membrane pump, therefore, in the coating cylinder of piston type and membrane pump formula, especially, if eliminate the coating cylinder of carrier pipe, then adopt the advantage of said structure larger.
Fig. 7, Fig. 8 are the details drawings being located at the second actuator 76 of coating machine main body 6 for the second check-valves 32 of second internal path (working solution supply passageway) 22 of positive opening coating cylinder 10.This second actuator 76 makes push rod 76a retreat by the turnover of air, and makes the movable spool 320 of the second check-valves 32 forcibly lift off a seat 322 (Fig. 8) by coming in before push rod 76a.This point is identical with above-mentioned first actuator 74 and the first check-valves 30, but in the following areas, second actuator 76 of band push rod 76a adopts distinctive structure.
Namely, the push rod 76a of the second actuator 76 of coating machine main body 6 not only have with its upper surface make the movable spool 320 of the second check-valves 32 forcibly lift off a seat 322 function (Fig. 8), this push rod 76a also forms a part for the open and close valve mechanism working solution supply passageway 50 of coating machine main body 6 being opened closedown.
With reference to Fig. 7, the sleeve 500 that above-mentioned push rod 76a is configured the exit portion (the working solution exit portion towards cylinder collecting recess 40) of the working solution supply passageway 50 in coating machine main body surrounds, and the inner peripheral surface of the upper end of this sleeve 500 is formed with valve seat 502.On the other hand, the spool 504 radially swelled is formed in the upper end of push rod 76a.Above-mentioned valve seat 502 and spool 504 form the open and close valve mechanism 506 exit portion of the working solution supply passageway 50 of coating machine main body 6 being opened closedown.
In the figure 7, when push rod 76a conjugates upward, open and close valve mechanism 506 lifts off a seat 502 and valve opening with the spool 504 of this push rod 76a one.As mentioned above, when this push rod 76a conjugates upward, the second check-valves 32 (arrow of Fig. 8) of positive opening coating cylinder 10.
When push rod 76a conjugates downward, spool 504 dropping place, in valve seat 502, makes open and close valve mechanism 506 be in the state of closedown.Certainly, by the backward movement of this push rod 76a, make the second check-valves 32 of coating cylinder 10 give play to its original function as check-valves, therefore, this second check-valves 32 can be utilized to stop working solution to spill from coating cylinder 10.
Push rod 76a has the flange 78 being fixedly installed on its base end part (bottom of Fig. 7), and this flange 78 is exerted a force downward by spring 80.Therefore, exerted a force downward by spring when push rod 76a is flat, consequently, open and close valve mechanism 506 is exerted a force towards valve closing direction by spring 80.
According to said structure, be installed in the process of coating machine main body 6 at coating cylinder 10, in addition, even if coating cylinder 10 is fixed in coating machine main body 6, only otherwise make the second actuator 76 action, working solution (insulation diluent) also would not be made to spill from coating machine main body 6.Certainly, in coating cylinder 10, the second check-valves 32 also can be utilized to stop working solution (insulation diluent) to spill from confined space 14 (work liquid chamber).
Again be back to Fig. 1, with reference to this Fig. 1, the action of electrostatic atomizer 2 in coating process be described.In coating process, first actuator 74 and the second actuator 76 action, push rod 74a, 76a are advanced, by the advance of this push rod 74a, 76a, the first check-valves 30 and the second check-valves 32 are maintained the state (in cylinder inside courtyard path 20 and cylinder, working solution supply passageway 22 is all opened) of positive opening.
(1) first check-valves 30 (cylinder inside courtyard path) is forced open;
(2) second check-valves 32 (in cylinder working solution supply passageway) are forced open.
By control gear pump 56 opening/closing or control access transfer valve 58, can control the amount of the working solution (insulation diluent) being supplied to coating cylinder 10.In addition, utilize the working solution being supplied to coating cylinder 10 to apply pressure to coating bag 12, coating can be made to flow out from coating bag 12 under controlled state.The opening/closing of gear pump 56, the path switching action of path transfer valve 58 is synchronously carried out with the closedown of opening of the priming valve 46 of coating machine main body 6.By this, coating can be improved start towards the supply of bell-jar 4 and supply the control accuracy stopped.
At the time point that the application of regulation terminates, the coating bag 12 forming coating reception room is in by the state of flattening completely, now, the internal capacity of coating bag 12 (coating reception room) is minimum, therefore, compare with existing piston type coating cylinder, the amount residuing in the coating of coating bag 12 is few.
When carrying out the color replacement of electrostatic atomizer 2, before changing with the coating cylinder 10 of other color paint being unloaded from coating machine main body 6 by coating cylinder 10, under the state being provided with coating cylinder 10, carry out cleaning of coating supply passageway 44 in coating machine main body 6 and bell-jar 4.
Fig. 9 represents the coating supply passageway 44 of coating machine main body 6 and the clean operation of bell-jar 4.In this clean operation, clean under the state that the coating cylinder used 10 is installed on coating machine main body 6.In clean operation, remove the action of the first actuator 74 and the second actuator 76, push rod 74a, 76a are retreated, by this, the function of original check-valves given play to by first check-valves 30, second check-valves 32, closes cylinder inside courtyard path 20 and working solution supply passageway 22.
Insert in the detergent remover supply passageway 70 being opened in coating machine main body 6 side and clean nozzle 84.When this clean nozzle 84 is inserted the entrance of detergent remover supply passageway 70, be configured at the 5th check-valves 72 of this detergent remover supply passageway 70 entrance by the positive opening of clean nozzle 84.By making external path transfer valve 86 action, detergent remover or air is made to be supplied to detergent remover supply passageway 70 from clean nozzle 84 under stress.Prior to the supply of this detergent remover or air, make priming valve 46 valve opening being clipped on coating machine main body inside courtyard supply passageway 44.In addition, supply together with detergent remover from clean nozzle 84 with beginning and drive bell-jar 4 to rotate.
The state of each valve in the clean operation of coating machine main body inside courtyard supply passageway 44 is as described below.
The positive opening of (1) first check-valves 30 (coating) is removed (function of common check-valves);
The positive opening of (2) second check-valves 32 (working solution supply) is removed (function of common check-valves);
(3) the 5th check-valves 72 (detergent remover in coating machine main body) are by the positive opening of clean nozzle 84;
(4) priming valve 46 valve opening;
(5) bell-jar 4 rotates.
When supplying detergent remover or air from clean nozzle 84 under stress, this detergent remover or air flow into coating machine main body inside courtyard supply passageway 44 via the detergent remover supply passageway 70 of coating machine main body 6, and discharge from bell-jar 4 via this coating supply passageway 44.By the flowing of this detergent remover or air, coating machine main body inside courtyard supply passageway 44 and bell-jar 4 are purified.Typical case, detergent remover and air are alternately supplied to coating machine main body 6 from clean nozzle 84.
Downstream due to detergent remover supply passageway 70 upstream end thereof (upper end) described above and coating machine main body inside courtyard supply passageway 44 links together, therefore, the detergent remover or the air that flow into coating supply passageway 44 arrive the front end being positioned at the first check-valves 30 of the position of giving prominence to from the lower end of coating cylinder 10, to purify the leading section of this first check-valves 30.Given play to the function of original check-valves due to the first check-valves 30 and closed an inside courtyard path 20 (Fig. 5), therefore, cylinder inside courtyard path 20 and coating machine main body inside courtyard supply passageway 44 are in the state cut off by the first check-valves 30.Therefore, the first check-valves 30 can be utilized to prevent detergent remover from invading the inside of coating bag 12.Although detergent remover is diluent typically, it also can be the washing water that with the addition of surfactant in water.
In addition, due to be assembled with this first check-valves 30 sleeve 300 and contain this sleeve 300 lower end path part 300a the second recess 402 between clamp the sealing ring 404 (Fig. 5) with the front end face face contact of sleeve 300, therefore, the pigment transfer passage portion limited by sealing ring 404 also can be cleaned by detergent remover or air certainly, can prevent the detergent remover comprising coating from polluting the wall entirety of the second recess 404.Therefore, utilize above-mentioned detergent remover, the coating supply passageway 44 of coating machine main body 6 can not only be made to become clean, also can make to become clean with the coupling part of coating cylinder 10.In addition, the leading section of the sleeve 300 of the coating material outlet of formation coating cylinder 10 also can be made to become clean.This is the advantage that should pay close attention to failing at present to see.Certainly, generally speaking the structure having given play to this advantage is not limited to the coating cylinder of packet mode, also can be applicable to the cylinder of coating cylinder in the form of piston, membrane pump formula.If cleaning of bell-jar 4 need be carried out, then detergent remover also can be made to be dispersed in bell-jar 4 from outside.When coating machine main body 6 clean at the end of, finally air is supplied to coating machine main body 6 from clean nozzle 84, by this, will be attached to coating machine main body inside courtyard supply passageway 44 and bell-jar 4 detergent remover remove.
After the clean end of coating machine main body 6, then, the replacing of the coating cylinder 10 being installed in coating machine main body 6 is carried out.Because the clean of coating machine main body 6 and cleaning of sealing ring 404 are terminated, therefore, as long as the coating cylinder 10 being filled with other color paint is installed on coating machine main body 6, just again application can be started.
For the coating cylinder 10 after unloading from coating machine main body 6, carry out cleaning of coating bag 12.Figure 10 is the figure cleaning operation for illustration of coating bag.The coating cylinder 10 used is located in the assigned position that station 88 cleaned by bag.This location, with identical relative to the location of coating machine main body 6, when coating cylinder 10 is located in assigned position, utilizes locking mechanism 90 to fix coating cylinder 10.
The actuator 880,882,884,886 being provided with band the first ~ four push rod of the first ~ four check-valves 30,32,34,36 corresponding to coating cylinder 10 in station 88 is cleaned at bag.The function identical in fact with the actuator 74,76 with first, second push rod of above-mentioned coating machine main body 6 given play to by actuator 880 ~ 886 due to this band the first ~ four push rod, therefore, omits its detailed description.
The coating bag 12 being arranged at the initial coating cylinder 10 at the clean station 88 of bag is in the state be crushed.In the cleaning of coating bag 12 forming coating reception room, while make that coating bag 12 expands to expand the volume of coating reception room along with (i), (ii) flatten coating bag 12 with the such operation of the volume reducing coating reception room, while make detergent remover, air enters in coating bag 12, in addition, the discharge of detergent remover, air is also carried out." expansion, the flattening " of coating bag 12 is set to one group, both once just can terminates, and also it can be carried out repeatedly repeatedly.Certainly, if desired, then can cleaning prior to coating bag 12, flatten coating bag 12 to greatest extent, reclaim the coating residued in coating bag 12 to greatest extent.
Each open and close valve and the state of check-valves 30,32,34,36 in the expansion process of coating bag as described below.
The positive opening of (1) first check-valves 30 (coating) is removed (function of common check-valves);
The positive opening of (2) second check-valves 32 (working solution supply) is removed (function of common check-valves);
(3) the 3rd check-valves 34 (detergent remover supply) are forced open;
(4) the 4th check-valves 36 (working solution discharge) are forced open.
As shown in Figure 10, in the clean station 88 of bag, air-source and detergent remover source (diluent or water) is provided with, from this air-source and detergent remover source air supply, detergent remover.The switching of air and detergent remover utilizes path transfer valve 888 and carries out.Air, detergent remover is made alternately to be supplied to coating bag 12 via the 3rd internal path (detergent remover supply passageway) 24 of coating cylinder 10 by this path transfer valve 888.As mentioned above, the function of common check-valves given play to by the first check-valves 30 of the outlet (lower end oral area 12c) of coating bag 12, makes coating path 20 be in the state of closedown.By air or coating to be supplied to the inside of coating bag 12 via the upper end oral area 12b of coating bag 12 from the 3rd internal path (detergent remover supply passageway) 24 of coating cylinder 10, thus coating bag 12 is expanded.Thereupon, the working solution be filled in the confined space 14 of the work liquid chamber forming coating cylinder 10 is forced from coating cylinder 10 by via the 4th internal path 26 (working solution drain passageway) at airtrapping portion 14a opening and extrudes passively.The working solution flowed out from coating cylinder 10 is recycled to working solution source.
As the concrete method of cleaning of coating bag 12, following example can be listed.
First operation (expansion process of coating bag): expand to make coating bag 12 towards coating bag 12 air supply via the 3rd internal path (detergent remover supply passageway) 24, make the internal capacity of coating bag 12 be extended to roughly maximum.By this, the main body 12a of coating bag 12 can be made to be in the state not having fold.First check-valves 30 (coating) is in the state of cut out.
Second operation (detergent remover supply step): detergent remover is supplied to coating bag 12 and detergent remover is flowed, to be cleaned by coating bag 12 along the inner surface of coating bag 12.First check-valves 30 (coating) is in the state of cut out.
3rd operation (flattening process of coating bag): flatten coating bag 12, make the internal capacity of coating bag 12 reduce to make the detergent remover of coating bag 12 to discharge.
As required, the second operation and the 3rd operation is repeatedly carried out.
The state of each open and close valve (check-valves 30,32,34,36) in above-mentioned 3rd operation (flattening process) of coating bag 12 is as described below.
(1) first check-valves 30 (coating) is forced open;
(2) second check-valves 32 (working solution supply) are forced open;
The positive opening of (3) the 3rd check-valves 34 (detergent remover supply) is removed (function of common check-valves);
The positive opening of (4) the 4th check-valves 36 (working solution discharge) is removed (function of common check-valves).
As shown in Figure 10, in the clean station 88 of bag, gear pump 890 is provided with.In above-mentioned 3rd operation (flattening process), the working solution of the amount controlled by gear pump 890 is supplied to coating cylinder 10 under stress.When working solution enters confined space 14 (the work liquid chamber) of coating cylinder 10, coating bag 12 is flattened by this working solution, and the air in coating bag 12 and detergent remover are pressed out to outside via lower end oral area 12c.The reference marks 892 of Figure 10 represents waste fluid container, and the detergent remover flowed out from coating bag 12 is contained in waste fluid container 892.
As mentioned above, by the expansion (expansion of the internal capacity of coating bag 12) of coating bag 12, flatten the internal capacity of the coating bag 12 (reduce) and be set as group, carried out one or many repeatedly to carry out, become clean to make the inside of coating bag 12.Then, finally make air enter in coating bag 12 and the detergent remover being attached to coating bag 12 inside is discharged, thus terminate the clean operation of coating bag 12.In the stage that the clean operation of coating bag 12 terminates, coating bag 12 is in the state (internal capacity of coating bag 12 is minimum state) be crushed.
For the coating cylinder 10 after the clean end of coating bag 12, then filling paint in coating bag 12.Figure 11 is the figure for illustration of coating filling work procedure.Coating cylinder 10 after cleaning is located in the assigned position of coating packing station 92.This location with relative to coating machine main body 6, wrap that to clean the location at station 88 identical, when coating cylinder 10 is located in assigned position, utilize locking mechanism 94 to fix coating cylinder 10.
In coating packing station 92, be provided with in the first ~ four check-valves corresponding to coating cylinder 10 except supplying the second relevant check-valves 32 to working solution and supplying the first check-valves 30, the band first of the 4th check-valves 36, the actuator 920,922 of the 4th push rod except the 3rd relevant check-valves 34 with detergent remover.The function identical in fact with the actuator 74,76 with first, second push rod of above-mentioned coating machine main body 6 given play to by actuator 920,922 due to this band the first ~ four push rod, therefore, omits its detailed description.
Each open and close valve and the state of check-valves 30,36 in coating filling work procedure as described below.
(1) first check-valves 30 (coating) is forced open;
(2) the 4th check-valves 36 (working solution discharge) are forced open.
For the coating of coating source being filled to coating bag 12 under stress and being provided with gear pump 96 in coating packing station 92, by controlling this gear pump 96, the coating of ormal weight is filled in coating bag 12 via the lower end oral area 12c of coating bag 12.Also the combination of flowmeter and flow control valve can be adopted to replace the flow-control of this gear pump 96, wherein, above-mentioned flowmeter is used for controlling the amount of the coating being supplied to coating bag 12 under stress from pump, when the amount of the coating utilizing this flow measurement to measure reaches setting, above-mentioned flow control valve stops coating towards the supply of coating bag 12.Make coating bag 12 expand because of the filling of coating, the working solution being full of confined space 14 is discharged to outside via airtrapping portion 14a and the 4th internal path (working solution drain passageway) 26, and the working solution after this discharge is recycled to working solution source.
Certainly, because before filling paint, cleaning of coating cylinder 10 is terminated, therefore, the color being filled in the coating in coating cylinder 10 is arbitrary.Coating cylinder 10 after the end-of-fill of coating is stored for carrying out next application.
Above, employing insulating properties diluent is illustrated as embodiment when working solution, but when adopting the conductive liquids such as water as working solution, also voltage retarding mechanism (Japanese: ボ Le テ mono-ジ Block ロ ツ ク Machine Agencies) can be arranged at robots arm 1, when present dynasty's electrostatic atomizer 2 applies high voltage (in painting operation), voltage retarding mechanism is utilized to carry out electric insulation.
The variation of following example as above-described embodiment can be listed.
(1) the first ~ four check-valves 30 ~ 36 being built in coating cylinder 10 also can be made up of the open and close valve of air driven.
(2) in the above-described embodiments, coating bag 12 comprises upper and lower oral area 12b, 12c, but also can be the coating bag (Figure 12) eliminating upper end oral area 12b and only comprise lower end oral area 12c.Reference marks 896 shown in Figure 12 represents path transfer valve.In fig. 12, the check-valves 30 ~ 36 being clipped on the coating cylinder inner gateway that the coating cylinder inner gateway communicated with coating bag 12 and confined space 14 (work liquid chamber) communicate is not shown.
(3) in the embodiment in figure 1, have employed with working solution directly to the mode that coating bag 12 pressurizes, but as shown in figure 13, also can be the coating cylinder comprising the working solution bag 8 adjacent with coating bag 12.This working solution bag 8 forms work liquid chamber, by supplying working solution towards this working solution bag 8, working solution bag 8 is expanded, thus flattens coating bag 12.
(4) working solution bag 8 also can comprise oral area 8a, 8b of about two, working solution in working solution bag is discharged from the oral area 8a of upper end, on the other hand, working solution is supplied to working solution bag 8 from lower end oral area 8b to expand (Figure 13) to make working solution bag 8.
(5) working solution bag 8 also can comprise an oral area 8b, via this oral area 8b, working solution is supplied to working solution bag 8, in addition, makes working solution discharge (Figure 14) from working solution bag 8 via this oral area 8b.In fig. 14, the check-valves being clipped on the coating cylinder inner gateway that the coating cylinder inner gateway communicated with coating bag 12 and working solution bag 8 communicate is not shown.
(6) also can clean station 88 at bag to arrange and add vibration source 28, with utilize this add vibration source 28 make to clean in coating cylinder 10 vibration (Figure 12) on upper and lower and/or left and right directions.
(7) also can prepare turntable 894 (Figure 12, Figure 14) in the clean station 88 of bag, coating cylinder 10 fixed by this turntable 894, the coating cylinder 10 in cleaning is rotated.In the drawings, reference marks O represents rotary middle spindle.This rotation can be the rotation on a direction, but it is preferable that, alternately repeatedly carries out rotating forward and counter-rotating.
Above, exemplify the coating cylinder 10 comprising coating bag 12 and embodiments of the invention are illustrated, but the present invention also can be applicable to the coating cylinder of piston type, film piston formula.If be described with reference to the example of Figure 15 to the inside method of cleaning of coating cylinder 130 in the form of piston, then as described below.
In fig .15, illustrated coating cylinder 130 has piston 132, clips this piston 132, is formed with work liquid chamber 134 above it, be formed with coating reception room 136 in the below of piston 132.(I) of Figure 15 schematically indicates the initial state being positioned piston type coating cylinder 130 to clean station.This is cleaned station and cleans station 88 (Figure 10) corresponding to above-mentioned bag.
First, the work liquid chamber 134 towards coating cylinder 130 supplies working solution, piston 132 is pressed to the most deep of coating reception room 136, reclaims the coating (operation (II) of Figure 15) residuing in coating reception room 136.Then, the above push piston 132 (operation (III) of Figure 15) of detergent remover is supplied towards coating reception room 136.Then, supply working solution to press down piston 132 towards work liquid chamber 134, the detergent remover of coating reception room 136 is discharged (operation (IV) of Figure 15).Degree piston 132 in the operation (III) of Figure 15 and operation (IV) pushing pressure can be arbitrary, such as, both can be pushed into topmost by piston 132, also can stop above pushing away and being transferred to ensuing discharge operation (operation (IV) of Figure 15) of piston 132 wherein on the way.In order to go up push piston 132 while cleaned by coating reception room 136, also detergent remover and air alternately can be supplied to coating reception room 136.In addition, air also can be utilized piston 132 will to be pushed into the height of a certain degree, then, detergent remover to be supplied to coating reception room 136.Like this, the combination of the supply mode of air and detergent remover is arbitrary, can determine by experiment.
Also above-mentioned operation III and operation IV can be set to one group, be carried out one or many and repeatedly carry out.In addition, as with reference to Figure 12 illustrates, also can in cleaning vertically left and right or up and down and left and right directions apply to vibrate to coating cylinder 130.In addition, as illustrated with reference to Figure 12 and Figure 14, also can in cleaning, coating cylinder 130 be rotated.In fig. 14, although identically with the coating cylinder 10 of above-mentioned packet mode, in the coating cylinder inner gateway communicated with the work liquid chamber 134 of coating cylinder 130, coating reception room 136, clamp check-valves, omit its diagram in fig. 14.As those skilled in the art can easily understand, in coating cylinder 130 in the form of piston, also can adopt the working solution drain passageway 26 illustrated in Fig. 1 etc., working solution supply passageway in the cylinder of the working solution in working solution supply passageway in the cylinder supplying working solution towards work liquid chamber 134 and the work of discharge liquid chamber 134 is formed at coating cylinder 130.
The present invention also preferably can be applicable to the coating cylinder employing membrane pump disclosed in patent document 8 (Japan Patent Beneficial 04-87759 publication).
Industrial utilizability
The present invention is applicable to electrostatic spraying.Especially, preferably paint robot is applicable to.
Symbol description
The arm of 1 paint robot
2 electrostatic atomizers
4 bell-jars
6 coating machine main bodys
10 are coated with fitted tube
12 coating bags (coating reception room)
First internal path (coating path) of 20 coating cylinders
30 first check-valves (the coating path in cylinder)
Coating path in 44 coating machine main bodys
46 priming valves
Detergent remover supply passageway in 70 coating machine main bodys
300 sleeves
The fixed valve base of 302 sleeve lower ends
304 movable spools
306 inner circumferential springs (movable spool being exerted a force: the second spring)
308 periphery springs (sleeve being exerted a force: the first spring)
Second recess of 402 containing sleeve
404 sealing rings
Claims (8)
1. an electrostatic atomizer, comprising can relative to the coating cylinder of coating machine main body mounting or dismounting, and described coating machine main body receives and supplies next coating to carry out application to workpiece from described coating cylinder, it is characterized in that,
Described coating cylinder comprises:
(i) sleeve, this sleeve forms the outlet of the described coating of described coating cylinder, and can conjugate in the vertical direction;
(ii) the first spring, this first spring exerts a force to described sleeve downward; And
(iii) coating open and close valve, this coating open and close valve is located at described sleeve and closedown is opened in the described outlet of described coating,
Described coating machine main body comprises:
(i) recess, this recess accommodates described sleeve;
(ii) coating path, this coating path has the opening offered on the bottom surface of described recess, and via the coating of this opening accepts from described coating cylinder;
(iii) detergent remover supply passageway, this detergent remover supply passageway receives the detergent remover from outside, and this detergent remover is guided to the upper end of described coating path; And
(iv) sealing ring, sealing ring is configured at the bottom surface of described recess, and is located at the outer peripheral portion of the upper end open of described coating path,
When described coating cylinder is installed on described coating machine main body, the spring force of described first spring is utilized to be pressed on described sealing ring by the lower surface of described sleeve,
Under the state that described coating cylinder is installed on described coating machine main body, carry out cleaning of the described coating path of described coating machine main body, by the detergent remover supplied from outside, near the outlet comprising the described coating cylinder limited by described sealing ring, the described coating path in coating machine main body is made to become clean interiorly.
2. electrostatic atomizer as claimed in claim 1, is characterized in that,
Described coating open and close valve comprises:
Fixed valve base, this fixed valve base is formed at the lower end of described sleeve;
Movable spool, this movable spool dropping place is in described fixed valve base; And
Second spring, this second spring exerts a force towards described fixed valve base to described movable spool.
3. electrostatic atomizer as claimed in claim 2, is characterized in that,
In described coating machine main body, be built-in with actuator, this actuator has the push rod of the movable spool above pushing away described coating cylinder.
4. electrostatic atomizer as claimed in claim 1, is characterized in that,
Be built-in with in described coating cylinder and make described coating open and close valve open the actuator of closedown.
5. electrostatic atomizer as claimed in claim 1, is characterized in that,
The priming valve be made up of open and close valve is provided with in the coating path of described coating machine main body.
6. electrostatic atomizer as claimed in claim 1, is characterized in that,
Described coating cylinder is the piston type cylinder utilizing piston to extrude coating.
7. electrostatic atomizer as claimed in claim 1, is characterized in that,
Described coating cylinder is the packet mode cylinder extruding coating by flattening coating bag.
8. electrostatic atomizer as claimed in claim 1, is characterized in that,
Described coating cylinder is the membrane pump formula cylinder being formed coating reception room by retractable film.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-218332 | 2009-09-23 | ||
| JP2009218332A JP5551908B2 (en) | 2009-09-23 | 2009-09-23 | Electrostatic coating machine with detachable paint cartridge |
| PCT/JP2010/066334 WO2011037112A1 (en) | 2009-09-23 | 2010-09-21 | Electrostatic coating machine employing removable paint cartridge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102639249A CN102639249A (en) | 2012-08-15 |
| CN102639249B true CN102639249B (en) | 2015-04-15 |
Family
ID=43795859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080042982.0A Expired - Fee Related CN102639249B (en) | 2009-09-23 | 2010-09-21 | Electrostatic coating machine employing removable paint cartridge |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP5551908B2 (en) |
| KR (1) | KR20120072374A (en) |
| CN (1) | CN102639249B (en) |
| TW (1) | TW201119745A (en) |
| WO (1) | WO2011037112A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102516650B1 (en) * | 2017-04-21 | 2023-04-03 | 요트. 바그너 게엠베하 | liquid tank for atomizer |
| JP7187275B2 (en) * | 2018-11-13 | 2022-12-12 | タクボエンジニアリング株式会社 | Spray gun equipment for painting |
| WO2023194740A1 (en) * | 2022-04-06 | 2023-10-12 | Micropply Limited | A detachable ground deposition accessory |
| GB202208009D0 (en) * | 2022-05-31 | 2022-07-13 | Micropply Ltd | An autonomous ground deposition machine with removable cartridges |
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| JP2002059993A (en) * | 2000-08-21 | 2002-02-26 | Surpass Kogyo Kk | Connection tool |
| JP2003211036A (en) * | 2002-01-17 | 2003-07-29 | Asahi Sunac Corp | Coating device |
| WO2003099455A1 (en) * | 2002-05-23 | 2003-12-04 | Abb K.K. | Cartridge for coating |
| WO2006132212A1 (en) * | 2005-06-06 | 2006-12-14 | Trinity Industrial Corporation | Applying machine |
| WO2006135066A1 (en) * | 2005-06-17 | 2006-12-21 | Toyota Jidosha Kabushiki Kaisha | Paint tank and method of processing the same |
| CN100408200C (en) * | 2003-09-12 | 2008-08-06 | 托利尼迪工业株式会社 | Coating machine |
| CN101790424A (en) * | 2007-08-31 | 2010-07-28 | 丰田自动车株式会社 | Coating material charging device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2521102Y2 (en) * | 1990-11-30 | 1996-12-25 | トリニティ工業株式会社 | Electrostatic coating equipment for conductive paint |
| KR20070118259A (en) * | 2005-04-13 | 2007-12-14 | 일리노이즈 툴 워크스 인코포레이티드 | Canister for electrostatic applicators |
| JP5586110B2 (en) * | 2009-09-23 | 2014-09-10 | ランズバーグ・インダストリー株式会社 | Cleaning method of paint cartridge and paint bag for electrostatic coating machine |
-
2009
- 2009-09-23 JP JP2009218332A patent/JP5551908B2/en not_active Expired - Fee Related
-
2010
- 2010-09-17 TW TW099131664A patent/TW201119745A/en unknown
- 2010-09-21 CN CN201080042982.0A patent/CN102639249B/en not_active Expired - Fee Related
- 2010-09-21 KR KR1020127010206A patent/KR20120072374A/en active IP Right Grant
- 2010-09-21 WO PCT/JP2010/066334 patent/WO2011037112A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002059993A (en) * | 2000-08-21 | 2002-02-26 | Surpass Kogyo Kk | Connection tool |
| JP2003211036A (en) * | 2002-01-17 | 2003-07-29 | Asahi Sunac Corp | Coating device |
| WO2003099455A1 (en) * | 2002-05-23 | 2003-12-04 | Abb K.K. | Cartridge for coating |
| CN100408200C (en) * | 2003-09-12 | 2008-08-06 | 托利尼迪工业株式会社 | Coating machine |
| WO2006132212A1 (en) * | 2005-06-06 | 2006-12-14 | Trinity Industrial Corporation | Applying machine |
| WO2006135066A1 (en) * | 2005-06-17 | 2006-12-21 | Toyota Jidosha Kabushiki Kaisha | Paint tank and method of processing the same |
| CN101790424A (en) * | 2007-08-31 | 2010-07-28 | 丰田自动车株式会社 | Coating material charging device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011037112A1 (en) | 2011-03-31 |
| KR20120072374A (en) | 2012-07-03 |
| TW201119745A (en) | 2011-06-16 |
| JP5551908B2 (en) | 2014-07-16 |
| JP2011067711A (en) | 2011-04-07 |
| CN102639249A (en) | 2012-08-15 |
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