CN1326631C - Rotation type atomization spraying device - Google Patents
Rotation type atomization spraying device Download PDFInfo
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- CN1326631C CN1326631C CNB2004101013541A CN200410101354A CN1326631C CN 1326631 C CN1326631 C CN 1326631C CN B2004101013541 A CNB2004101013541 A CN B2004101013541A CN 200410101354 A CN200410101354 A CN 200410101354A CN 1326631 C CN1326631 C CN 1326631C
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- leading section
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- 238000000889 atomisation Methods 0.000 title claims description 122
- 238000005507 spraying Methods 0.000 title claims description 64
- 238000000576 coating method Methods 0.000 claims abstract description 227
- 239000011248 coating agent Substances 0.000 claims abstract description 224
- 239000002904 solvent Substances 0.000 claims abstract description 63
- 230000000994 depressogenic effect Effects 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 abstract description 19
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000007921 spray Substances 0.000 description 26
- 239000003973 paint Substances 0.000 description 11
- 230000002000 scavenging effect Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 125000006850 spacer group Chemical group 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- NOQGZXFMHARMLW-UHFFFAOYSA-N Daminozide Chemical group CN(C)NC(=O)CCC(O)=O NOQGZXFMHARMLW-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- Electrostatic Spraying Apparatus (AREA)
Abstract
The invention provided a rotary atomizing coating device which prevents the mixture of different coatings by eliminating coatings sticking to the rotary atomizing head sufficiently through cleaning and permits reduction of the amount of the solvent needed to reduce the cleaning time and clean. The device 1 has a hollow rotating shaft 4, a rotary atomizing head 6 attached at the tip of the shaft and a coating-supplying tube 5 extending through the shaft and supplying a coating or a solvent to the atomizing head. The nozzle portion 51, or the front end of the supplying tube of the device 1, is trumpet-shaped.
Description
Technical field
The present invention relates to a kind ofly be used for that for example a vehicle body sprays and the rotation type atomization spraying device of application atomised coating to an object.
Background technology
Usually, a kind ofly comprise mitriform rotary atomization head and that a hollow rotating shaft, is located at this rotating shaft front end to pass this rotating shaft be well-known with the rotation type atomization spraying device to the coating supply pipe of this rotary atomization head supply coating, wherein, rotation by this rotary atomization head applies centrifugal force with atomised coating on coating, and this atomised coating (for example is ejected into an object, the shell of one vehicle body or household electrical appliance) on, thus this object of application.
Such rotation type atomization spraying device mainly is divided into two classes.One class is the rotation type atomization spraying device with a single coating supply pipe, and is another kind of for having a rotation type atomization spraying device of a plurality of coating supply pipes.
Rotation type atomization spraying device with single coating supply pipe is mainly used in a kind of coating and sprays application.Traditional rotation type atomization spraying device with single coating supply pipe also can be used for alternately spraying various coating by fall its coating with solvent clean through the coating on the part (a for example paint supply passage that comprises coating supply pipe and rotary atomization head).
On the other hand, the rotation type atomization spraying device with a plurality of coating supply pipes is mainly used in and selects a kind of application of spraying from the various coating of being supplied.
Owing to be useful on the coating supply pipe of coating separately, rotation type atomization spraying device need not to clean the paint supply passage that comprises the coating supply pipe when switching coating to be sprayed, thereby reduced paint loss, shortened scavenging period (in other words, be the time that is used to switch coating), and reduced the amount of the solvent that is used to clean.Japanese kokai publication hei 09-75789 communique discloses an example of this technology.
For alternately spraying various coating by a single rotation type atomization spraying device, most important requirement is " preventing that different types of coating from mixing mutually " and " improving coating switching efficiency (reduce paint loss, shorten the solvent that scavenging period and minimizing are used to clean) ".
Angle from " preventing that different types of coating from mixing mutually " need not to clean the paint supply passage that it comprises the coating supply pipe for the rotation type atomization spraying device with a plurality of coating supply pipes.Yet, this rotation type atomization spraying device has a basic problem, promptly being detained enduringly in the untapped coating supply pipe of this rotation type atomization spraying device has coating and this coating to drop onto on the rotary atomization head from this untapped coating supply pipe, thereby causes that different types of coating mixes mutually in spraying coating process.
Therefore, the rotation type atomization spraying device with a plurality of coating supply pipes is unsuitable for using in the occasion that must avoid different types of coating to mix mutually utterly.
For rotation type atomization spraying device with single coating supply pipe and rotation type atomization spraying device, all be difficult to the coating in the rotary atomization head is cleaned to prevent that this coating from mixing with another kind of coating with a plurality of coating supply pipes.
Especially, difficult near the cleaning of the rotary-atomizing head part the coating supply pipe leading section, because solvent is not easy to arrive this part.
For a kind of solution to the problems described above that is intended for use in as shown in Figure 7, coating supply pipe 105 is constructed to one and comprises the bimetallic tube of managing a 105a and an outer tube 105b in, so that coating or solvent are by interior pipe 105a, and solvent is by the space between interior pipe 105a and the outer tube 105b, thereby improvement is to the cleaning performance of rotary atomization head.
Yet,, also be difficult to clean and stick to the rotary atomization head inwall and coat the coating of supply pipe leading section periphery even adopt this structure.
Therefore,, must use quite a large amount of solvents to wash for a long time, thereby produce the problem of scavenging period and quantity of solvent increase in order to reach enough cleaning performances.
Summary of the invention
A purpose of the present invention is to provide a kind of rotation type atomization spraying device, the coating that this rotation type atomization spraying device can fully be cleaned on its rotary atomization head mixes mutually to prevent different types of coating, thereby has shortened scavenging period and reduced the amount of the solvent that is used to clean.
According to the present invention, a kind of rotation type atomization spraying device comprises a hollow rotating shaft, one is arranged on the rotary atomization head of this rotating shaft front end, and one pass this rotating shaft with the coating supply pipe to this rotary atomization head supply coating or solvent, it is characterized in that, the leading section of described coating supply pipe be external diameter and internal diameter enlarge forward tubaeform.
Therefore, thus coat in the face of the rotary atomization head inner wall surface and to form negative pressure in the space of supply pipe leading section periphery and prevent that to suck solvent and to clean fully different types of coating from mixing mutually.Solvent need not to increase and just can arrive all parts that are stained with coating on it too much, therefore can shorten the amount that scavenging period also reduces the solvent that is used to clean.
Alternatively or additionally, a kind of rotation type atomization spraying device comprises a hollow rotating shaft, one is arranged on the rotary atomization head of this rotating shaft front end, and one pass this rotating shaft with the coating supply pipe to this rotary atomization head supply coating or solvent, it is characterized in that, described coating supply pipe has the leading section that external diameter enlarges, the one recessed backward coating portion of accumulating is formed on the outer periphery of the above coating supply pipe leading section of inner wall surface of described rotary atomization head, so that the leading section of described coating supply pipe and described coating accumulate the basic same position place on the axial direction that the leading section of portion is arranged on described rotating shaft.
Therefore, coat in the face of the rotary atomization head inwall and to form negative pressure in the space of supply pipe leading section periphery so that solvent is sucked wherein, thereby clean fully to prevent that different types of coating from mixing mutually.The flow of solvent need not to increase too much and just can spread all over the each several part that is stained with coating on it, thereby can shorten scavenging period and save the solvent that is used to clean.
Especially, when the leading section that accumulates portion when tubaeform leading section and coating with the coating supply pipe is arranged on essentially identical position simultaneously, make and coat the effect that forms negative pressure in the space of supply pipe leading section periphery in the face of the rotary atomization head inner wall surface and further improve, with the further cleaning performance (can in a short time, thoroughly clean the effect of part to be cleaned) that improves with the quantity of solvent that reduces.
Preferably, one has a mid portion that inaccessible parts that accumulate the forward direction depressed part of portion in the face of described coating are arranged on described rotary atomization head inner wall surface and sentences and be convenient to a centrifugal force is applied on the coating.
Therefore, in a space of rotary atomization head, produce a powerful vortex-like air-flow centrifugal force is applied on the coating in this space.Therefore, the space of supply pipe leading section periphery is in negative pressure so that solvent is sucked wherein in the face of the rotary atomization head inwall is coated, thereby cleans fully to prevent that different types of coating from mixing mutually.The flow of solvent need not to increase too much and just can spread all over the each several part that is stained with coating on it, thereby can shorten scavenging period and save the solvent that is used to clean.
Description of drawings
Fig. 1 is the side sectional view of a rotation type atomization spraying device according to an embodiment of the invention;
Fig. 2 is the side sectional view according to the leading section of the rotation type atomization spraying device of the described embodiment of the invention;
Fig. 3 is the leading section side sectional view that one when application is shown is coated with materials flow;
Fig. 4 is the leading section side sectional view that the solvent streams when cleaning this rotation type atomization spraying device is shown;
Fig. 5 is the side sectional view of the leading section of another coating supply pipe;
Fig. 6 (A), (B), (C) illustrate the application according to the rotation type atomization spraying device of the described embodiment of the invention;
Fig. 7 is the side sectional view of a traditional coating supply pipe;
Fig. 8 one has the side sectional view of the rotation type atomization spraying device of a coating supply pipe according to another embodiment of the present invention.
The specific embodiment
Below with reference to Fig. 1,2 and 6 couples according to an embodiment of the invention the total of a rotation type atomization spraying device 1 describe.
Be explanation below to rotation type atomization spraying device 1 with a single coating supply pipe 5.Alternatively, a rotation type atomization spraying device applicatory can have a dual-coating supply pipe that comprises pipe and an outer tube in, so as by interior pipe inspection coating also by the space ejection of solvent between interior pipe and the outer tube.
The number of coating supply pipe is not limited to one.Alternatively, a rotation type atomization spraying device applicatory can have a plurality of coating supply pipes that pass a hollow rotating shaft.
Alternatively, a rotation type atomization spraying device applicatory can have a hollow rotating shaft that is run through by parts, and wherein, these parts form the hole by one or more coating services.
Rotation type atomization spraying device according to the present invention comprises under the situation of various coating such as oil paint, water paint or other coating all very convenient in use.In the following description, " solvent " refers to organic solvent under the situation of using oil paint, and for example diluent refers to water under the situation of using water paint.
In the following description, the direction with an arrow A among Fig. 1 is defined as " forward direction ".Arrow A is substantially parallel with the axial direction of the rotating shaft 4 that the back will be discussed.
Described rotation type atomization spraying device 1 jet atomization coating is with application one object (for example, a vehicle body or a household appliances shell).For example, shown in Fig. 6 (A), (B), (C), this rotation type atomization spraying device 1 is employed on the middle part of the top of the top ends that is fixed to a multi-joint type manipulator 101, a shape pillar 102 or a pillar 103 time.
As shown in Figure 1, this rotation type atomization spraying device 1 mainly comprises a main body 2, a motor 3, described rotating shaft 4, described coating supply pipe 5 and a rotary atomization head 6.
This main body 2 is structural elements of this rotation type atomization spraying device 1 and holds motor 3.This main body 2 also is used for the support unit that is fixed to rotation type atomization spraying device 1 on a multi-joint type manipulator or the pillar and supports this rotation type atomization spraying device 1 as one.Be coated with a cover 10 that is essentially cylindrical parts on the outer surface of main body 2.Main body 2 also accommodates one and is used for making the charged high-voltage generator (not shown) of atomised coating that sprays from rotary atomization head 6.
Motor 3 drives rotating shaft 4.In the present embodiment, motor 3 is an air motor, and it comprises a body 30, an air bearing 31 etc.
The structural element that this body 30 is a motor 3 also passes through these air bearing 31 rotatably mounted rotating shafts 4.By an air feed passage 31a air is offered air bearing 31.
The rotating shaft of being made by a hollow (being essentially cylindrical) parts 4 passes to rotary atomization head 6 with the rotary driving force of motor 3.On the leading section (top ends) of rotating shaft 4 outer surfaces, be formed with an external screw thread, and on the interior perimeter surface of a base portion 60, be formed with internal thread, so that rotary atomization head 6 is screwed on the leading section of rotating shaft 4.
On the rearward end (base portion) of rotating shaft 4, be formed with alar part with as a turbine 40, this turbine 40 by from the air of a compressor (not shown) and turn so that rotating shaft 4 rotate.Described coating supply pipe 5 can run through this rotating shaft 4 with the relative rotation.
Though turbine 40 is formed on the rearward end of rotating shaft 4 in the present embodiment, this turbine 40 also can be fixed to alternatively as one and be independent of on the rotating shaft 4 of parts of turbine 40.In addition, although rotating shaft 4 rotates by air motor 3 in the present embodiment, the present invention is not limited to this mode.Rotating shaft 4 can rotate by hydraulic pressure or electro-motor alternatively.
As illustrated in fig. 1 and 2, coating supply pipe 5 provides coating to rotary atomization head one inner wall surface of rotary atomization head 6 (more strictly speaking, to).In the present embodiment, the coating supply pipe is a single pipe, and this pipe also is used to provide and is used for cleaning the solvent that is bonded at the coating on the rotary atomization head 6.
Coating supply pipe 5 is one as a pipe that is used for coating or the solvent service duct 50 by wherein.Top ends (leading section) at coating supply pipe 5 is formed with a nozzle segment 51.This nozzle segment 51 forms tubaeform (expanding) that broadens forward.
The rearward end of this coating supply pipe 5 forms a valve seat 52 and inserts the top ends (leading section) of a tube connector 11 regularly.The rearward end of this tube connector 11 is fixed on the described main body 2.
One shaft-like needle valve 12 inserted these tube connectors 11 so that the inwall of itself and this tube connector 11 keeps a preset distance.The top ends of this needle valve 12 (leading section) also can be coupled in the described valve seat 52 for needle-like.One piston 12a be formed on the base portion (rearward end) of needle valve 12 and by a spring 13 bias voltages so that the top ends of this needle valve 12 be coupled in the valve seat 52.
One space in piston 12a the place ahead is communicated with an air feed passage 14.By providing compressed air to this space, the biasing force that needle valve 12 overcomes spring 13 moves backward, thereby this needle valve 12 is separated with valve seat 52.
A fluid service duct 15 that forms in main body 2 middle punches is configured to make the container (not shown) that stores various coating respectively and selects a kind of coating of rotary atomization head 6 and a coating switching device shifter (not shown) and the coating supply pipe 5 (rearward end of tube connector 11 more strictly speaking) of solvent given to be supplied to link to each other.
Therefore, fluid service duct 15 is communicated with alternatively so that to rotary atomization head 6 supply coating or solvents with coating supply pipe 5 by operation (vertically moving) needle valve 12, this service duct is separated with coating supply pipe 5 to cut off coating or the solvent supplied cut off and rotary atomization head 6.
In addition, operation, the ON/OFF of motor 3, the adjustment of motor 3 rotating speeds and the operation of needle valve 12 of a control device (not shown) with control coating switching device shifter is set.
As shown in Figure 1, 2, rotary atomization head 6 and the rotation of rotating shaft 4 one be so that apply centrifugal force to the coating that offers rotary atomization head 6 one surfaces, thereby with the coating atomizing and be ejected on the object.This rotary atomization head 6 comprises that mainly base portion 60, is along expanded in diameter portion 61, a spacer portion 62 and inaccessible parts 65.
Latter half of base portion 60 as rotary atomization head 6 is essentially cylindrical.This base portion 60 forms within it has internal thread so that rotary atomization head 6 is screwed on the leading section of rotating shaft 4 on the perimeter surface.
As the first half of rotary atomization head 6 along expanded in diameter portion 61 form one along diameter expand forward tubaeform.Spacer portion 62 is arranged on along the boundary between expanded in diameter portion 61 and the base portion 60.One through hole 63 is formed on and is essentially spacer portion 62 centers.Accumulate portion 64 along the inner wall surface of expanded in diameter portion 61 is recessed backward with the coating that forms a circumferential edge along this through hole 63 periphery of the nozzle segment 51 of coating supply pipe 5 leading sections (in other words).
In this structure, insert the top (leading section) of coating supply pipe 5 nozzle segments 51 of through hole 63 and the basic same position place on the axial direction (direction substantially parallel) that hub head end portion 64a (shown in Figure 3) that coating accumulates portion 64 is arranged on described rotating shaft 4 with arrow A, that is to say that they flush mutually.
In a pars intermedia office, be provided with and be the inaccessible parts 65 of plate-like basically to form a spray chamber 66 along the inner wall surface 61a of expanded in diameter portion 61.Spray chamber 66 be one be used for coating in rotary atomization head 6 apply centrifugal force and by along the rear portion (part backward) of the inner wall surface 61a of expanded in diameter portion 61 and inaccessible parts 65 around the space that forms.By coating supply pipe 5 with coating or solvent supply in spray chamber 66.
Inaccessible parts 65 are applied to centrifugal force on the coating that is supplied in the spray chamber 66 so that coating becomes subparticle (this coating atomizes).Be formed with one at the center of inaccessible parts 65 inner surfaces (surface towards spray chamber 66) and be cone shape projection 65a basically.Be formed with a forward direction depressed part 65b around this projection 65a.
In inaccessible parts 65, between the mid portion of projection 65a and the outside center surface of these obturation parts 65 surface of spray chamber 66 (not towards), be formed with a center connecting hole 65c.In inaccessible parts 65, be formed with a plurality of outside connecting hole 65d so that make the external communications of spray chamber 66 edges along inner wall surface 61a and this spray chamber 66 of expanded in diameter portion 61.
Below with reference to Fig. 3 the coating stream when carrying out application by rotation type atomization spraying device 1 is illustrated.
Coating is discharged to be supplied to spray chamber 66 by the service duct 50 of coating supply pipe 5 and from nozzle segment 51.Most of coating of discharging from nozzle segment 51 is kept straight on forward when being in converged state, and collides with the projection 65a that is formed on inaccessible parts 65 inner surfaces.Because rotary atomization head 6 rotates at a high speed when application, centrifugal action with the coating of projection 65a collision on so that coating moves towards the outer rim of these obturation parts 65 along the inner surface of inaccessible parts 65.
The coating that arrives inaccessible parts 65 outer rims to spray chamber 66 outside moving, moves to leading section (outer rim) along expanded in diameter portion 61 along described inner wall surface 61a by outside connecting hole 65d then.Coating is near more from the leading section (outer rim) along expanded in diameter portion 61, and the centrifugal force that acts on the coating is big more, thereby the coating atomizing is fine droplet.Atomised coating scatters and adheres on the surface of object from the leading section (outer rim) along expanded in diameter portion 61.
Rotation type atomization spraying device 1 is ejected on the object coating with this object of application by the way.
Because rotation type atomization spraying device 1 rotates at a high speed when application, clagging is on the outer surface of the part (in the present embodiment, accumulating portion 64 for coating) that constitutes spray chamber 66 inner wall surface, inaccessible parts 65 and part that this coating flows through.
Therefore, mix mutually for preventing different types of coating, solvent must arrive these parts (not comprising the part that coating flows through) so that dissolving and remove the coating that sticks on these parts when cleaning.
Describe below with reference to the solvent streams of Fig. 4 when cleaning rotation type atomization spraying device 1.This cleaning is carried out during a period of time when rotation type atomization spraying device 1 employed coating is changed into another kind of coating and stopping painting work.
Solvent is discharged to be supplied to spray chamber 66 by the service duct 50 of coating supply pipe 5 and from nozzle segment 51.Keep straight on forward when being in converged state from most of solvent that nozzle segment 51 is discharged, and collide with the projection 65a that is formed on inaccessible parts 65 inner surfaces.Because rotary atomization head 6 rotation when cleaning (yet, to stick to rotary atomization head 6 inner wall surface 61a and coat supply pipe 5 leading sections in order to clean, be the coating of nozzle segment 51 peripheries, rotary speed when rotary speed is lower than application), centrifugal action with the solvent of projection 65a collision on so that solvent moves towards the outer rim of these obturation parts 65 along the inner surface of inaccessible parts 65.
The solvent that arrives inaccessible parts 65 outer rims is outside mobile to spray chamber 66 by outside connecting hole 65d, moves to this leading section along expanded in diameter portion 61 (outer rim) along the inner wall surface 61a along expanded in diameter portion 61 then.
Therefore, solvent flows on the essentially identical part of part of flowing through usually with coating, thus dissolving and remove the coating that sticks on these parts.
The solvent of some and described projection 65a collision is by center connecting hole 65c and arrive the outside center surface of inaccessible parts 65.Subsequently, solvent moves towards the outer rim of these obturation parts 65 by the outer surface of centrifugal force along inaccessible parts 65.
Therefore, solvent flows on the outer surface of inaccessible parts 65, sticks to this lip-deep coating thereby dissolve and remove, and wherein, coating sticks on this outer surface when application.
Rotation type atomization spraying device 1 according to present embodiment, the leading section of coating supply pipe 5 (nozzle segment 51) is tubaeform, and solvent and compressed air are mixed and spray chamber 66 is given in supply (or solvent and compressed air by alternate supplies), thereby improved the effect of cleaning the part (in the present embodiment, accumulating portion 64) that constitutes spray chamber 66 inner wall surface for coating.
More particularly, because nozzle segment 51 is tubaeform along diameter expansion, it is not to keep straight on forward when being in converged state but diffuse into to a certain degree coniform that great majority are fed to compressed air in the spray chamber 66 with coating, then by nozzle segment 51 ejections.Therefore, by compressed air stream, the space of contiguous coating supply pipe 5 leading sections (nozzle segment 51) periphery, promptly the pressure that accumulates in the space of portion 64 towards coating becomes negative pressure.At this moment, the pressure in the space between the leading section of the end face of the through hole 63 of rotary atomization head 6 and coating supply pipe 5 also becomes negative pressure.
Therefore, solvent owing to negative pressure is inhaled into described space.Thereby, some solvents can easily arrive coating and accumulate portion 64, thereby can clean the rotary atomization head 6 inner wall surface 61a (being that coating accumulates portion 64 in the present embodiment) that are difficult to clean with conventional method fully and coat the periphery of supply pipe 5 leading sections (nozzle segment 51).In addition, can also clean the end face of through hole 63 of rotary atomization head 6 and the space between coating supply pipe 5 leading sections fully.Therefore, can prevent that different types of coating from mixing mutually.
Solvent need not to increase too many flow just can spread all over the each several part that is stained with coating on it, therefore can shorten scavenging period and save the solvent that is used to clean.
Can according to the kind (characteristic) of the employed coating of rotation type atomization spraying device and stream (injections) be measured and the shape and size of rotary atomization head are suitably selected the aperture (the angle θ among Fig. 5) of nozzle segment 51.
According to rotation type atomization spraying device 1 of the present invention, recessed backward coating accumulates portion 64 and is formed on rotary atomization head 6 inner wall surface 61a and coats supply pipe 5 leading sections (nozzle segment 51) periphery, and hub head end portion 64a (shown in Figure 3) that the leading section of the nozzle segment 51 of coating supply pipe 5 and coating accumulate portion 64 is arranged on the basic same position place on the axial direction (substantially parallel with arrow A) of rotating shaft 4, be that they flush mutually, thereby improved the effect of cleaning the part (in the present embodiment, accumulating portion 64) that constitutes spray chamber 66 inner wall surface for coating.
More particularly, be arranged in the leading section of the nozzle segment 51 of coating supply pipe 5 and hub head end portion 64a (shown in Figure 3) that coating accumulates portion 64 under the situation at the basic same position place on the axial direction (substantially parallel) of rotating shaft 4 with arrow A, solvent and compressed air are supplied to spray chamber 66 from coating supply pipe 5, therefore compressed air stream makes the space of contiguous coating supply pipe 5 leading sections (nozzle segment 51) periphery, promptly forms negative pressure in the face of coating accumulates in the space of portion 64.Simultaneously, it also makes in the end face of through hole 63 of rotary atomization head 6 and the space between coating supply pipe 5 leading sections and forms negative pressure.
Therefore, solvent is inhaled into this negative pressure space.Therefore, some solvents can easily arrive and fully clean the rotary atomization head 6 inner wall surface 61a be difficult to clean usually and coat the coating of supply pipe 5 leading sections (nozzle segment 51) periphery and accumulate portion 64.In addition, can also clean the end face of through hole 63 of rotary atomization head 6 and the space between coating supply pipe 5 leading sections fully.Therefore, can prevent that different types of coating from mixing mutually.
Solvent need not to increase too many flow just can spread all over the each several part that is stained with coating on it, therefore can shorten scavenging period and save the solvent that is used to clean.
The nozzle segment 51 of coating supply pipe 5 leading sections and coating accumulate the position basically identical of the 64 leading section 64a of portion on the axial direction (substantially parallel with arrow A) of rotating shaft 4 can be improved cleaning dope effectively to accumulate the reason of effect of portion 64 as follows:
If the nozzle segment 51 of coating supply pipe 5 leading sections is arranged on the place ahead that coating accumulates the 64 leading section 64a of portion, nozzle segment 51 accumulates portion 64 away from coating, accumulates the effect that forms negative pressure in the space of portion 64 thereby reduced to make in the face of coating.
On the other hand, if the nozzle segment 51 of coating supply pipe 5 leading sections is arranged on the rear that coating accumulates the 64 leading section 64a of portion, even nozzle segment 51 is tubaeform, also will keep straight on forward from the compressed air of this nozzle segment 51 ejections, accumulate the effect that forms negative pressure in the space of portion 64 thereby reduced to make in the face of coating along the end face of through hole 63.
Especially, basically form position consistency by making flaring coating supply pipe 5 leading sections (nozzle segment 51) accumulate the 64 leading section 64a of portion with the coating that is in simultaneously same position substantially, further improved to make forming the effect of negative pressure in the space of supply pipe 5 leading sections (nozzle segment 51) peripheries, thereby made the cleaning performance optimum in the face of rotary atomization head 6 inner wall surface 61a (being that coating accumulates portion 64) coat.
Therefore, having its leading section (nozzle segment 51) is the most preferred embodiment of the present invention for tubaeform and its leading section is arranged on the rotation type atomization spraying device 1 of coating supply pipe that accumulates the basic identical place, position of the 64 leading section 64a of portion with coating.
As shown in Figure 8, a coating supply pipe 55 can be one comprise pipe 55a and an outer tube 55b in one bimetallic tube in case by interior pipe 55a spray paint and solvent also by the space ejection of solvent between interior pipe 55a and the outer tube 55b.Hub head end portion 64a (shown in Figure 3) that the leading section of outer tube 55b and coating accumulate portion 64 is arranged on the basic same position place on the axial direction (substantially parallel with arrow A) of rotating shaft 4, and therefore the pressure that accumulates in the space of portion 64 in the face of coating can be negative value to improve the cleaning performance of solvent.
In the rotation type atomization spraying device 1 of present embodiment, recessed backward coating accumulates portion 64 and is formed on rotary atomization head 6 inner wall surface 61a and coats on the periphery of supply pipe 5 leading sections (nozzle segment 51), and the inaccessible parts 65 that are arranged on the pars intermedia office of rotary atomization head 6 inner wall surface 61a form wherein to have in the face of coating and accumulate the recessed forward depressed part 65b of portion 64 to improve the effect of the part (being that coating accumulates portion 64 in the present embodiment) of cleaning formation spray chamber 66 inner wall surface except that the part that coating is flowed through.
More particularly, some are fed in the spray chamber 66 and are not discharged to the outside by outside connecting hole 65d but flow to coating with the compressed air that coating moves along inaccessible parts 65 inner surfaces and accumulate portion 64 and accumulate the vortex-like air-flow of portion 64 to produce one around the coating in nozzle segment 51, inaccessible parts 65 inner surfaces (projection 65a and depressed part 65d) and the spray chamber 66.By producing this vortex-like air-flow, some solvents can easily arrive coating with this air-flow and accumulate portion 64 and be difficult to the rotary atomization head 6 inner wall surface 61a that clean usually (in the present embodiment with abundant cleaning, be that coating accumulates portion 64) coat the periphery of supply pipe 5 leading sections (nozzle segment 51), thus prevent that different types of coating from mixing mutually.
Solvent need not to increase too many flow just can spread all over the each several part that is stained with coating on it, therefore can shorten scavenging period and save the solvent that is used to clean.
Although only inserted single coating supply pipe 5 in rotating shaft 4, the number that inserts the coating supply pipe in the rotating shaft is unrestricted.Even in rotating shaft, insert a plurality of coating supply pipes, also can form tubaeform by the leading section that makes these coating supply pipes and clean rotary atomization head up hill and dale, thereby prevent that different types of coating from mixing mutually, thereby shortened scavenging period and reduced the amount of the solvent that is used to clean.
It is not flaring one traditional rotation type atomization spraying device that Fig. 7 illustrates its coating supply pipe 105 leading sections.When the leading section of this tradition rotation type atomization spraying device turned to the top of horizontal direction (direction of arrow A), coating may be fallen on the motor and motor is broken down along coating supply pipe outer wall.Therefore, traditional rotation type atomization spraying device can only be from horizontal direction (direction of arrow A) the less angle (more strictly speaking, about 10 ° angle) that is inclined upwardly.Therefore, traditional rotation type atomization spraying device is mainly used in downward or oblique occasion of rotating down.
According to rotation type atomization spraying device 1 of the present invention, nozzle segment 51 flares of coating supply pipe 5 leading sections make distance between the end face (inner surface) of the outer rim of nozzle segment 51 and through hole 63 can shorten to prevent that coating from falling on the motor 3 along the outer wall of coating supply pipe 5.
Therefore, rotation type atomization spraying device 1 can be used on the upwards bigger occasion of rotational angle.According to present embodiment, by evidence, when rotary atomization head 1 is inclined upwardly 30 when spending from horizontal direction, coating will never flow on the motor 3 along coating supply pipe 5 outer walls.
Under the situation that is easy to drip along the outer wall of coating supply pipe 5 at coating, for example under the situation that the ground spray paint of having a rest when the marginal portion equal time of application one object consumes with saving coating, the present invention is especially effective.When using one to be arranged on the bumper etc. of rotation type atomization spraying device application one automobile at a lower position place, the present invention is also very effective.
Claims (4)
1. rotation type atomization spraying device comprises:
One hollow rotating shaft;
One is arranged on the rotary atomization head of this rotating shaft front end; And
One passes this rotating shaft with the coating supply pipe to this rotary atomization head supply coating or solvent,
It is characterized in that, the leading section of described coating supply pipe be external diameter and internal diameter enlarge forward tubaeform.
2. rotation type atomization spraying device according to claim 1, it is characterized in that, the one recessed backward coating portion of accumulating is formed on the outer periphery of the above coating supply pipe leading section of inner wall surface of described rotary atomization head, so that the leading section of described coating supply pipe and described coating accumulate the basic same position place on the axial direction that the leading section of portion is arranged on described rotating shaft.
3. rotation type atomization spraying device comprises:
One hollow rotating shaft;
One is arranged on the rotary atomization head of this rotating shaft front end; And
One passes this rotating shaft with the coating supply pipe to this rotary atomization head supply coating or solvent,
It is characterized in that, described coating supply pipe has the leading section that external diameter enlarges, the one recessed backward coating portion of accumulating is formed on the outer periphery of the above coating supply pipe leading section of inner wall surface of described rotary atomization head, so that the leading section of described coating supply pipe and described coating accumulate the basic same position place on the axial direction that the leading section of portion is arranged on described rotating shaft.
4. according to claim 2 or 3 described rotation type atomization spraying devices, it is characterized in that, one has the pars intermedia office that inaccessible parts that accumulate the forward direction depressed part of portion in the face of described coating are arranged on described rotary atomization head inner wall surface, so that a centrifugal force is applied on the coating.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP422124/2003 | 2003-12-19 | ||
| JP2003422124A JP4347036B2 (en) | 2003-12-19 | 2003-12-19 | Rotary atomization coating equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1628914A CN1628914A (en) | 2005-06-22 |
| CN1326631C true CN1326631C (en) | 2007-07-18 |
Family
ID=34783093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004101013541A Expired - Fee Related CN1326631C (en) | 2003-12-19 | 2004-12-17 | Rotation type atomization spraying device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4347036B2 (en) |
| CN (1) | CN1326631C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008139599A1 (en) * | 2007-05-02 | 2008-11-20 | Ransburg Industrial Finishing K.K. | Paint sprayer with rotary atomizer |
| KR101224099B1 (en) * | 2009-05-11 | 2013-01-21 | 에이비비 가부시키가이샤 | Electrostatic coating device |
| JP5504100B2 (en) * | 2010-08-25 | 2014-05-28 | ランズバーグ・インダストリー株式会社 | Rotating atomizing head for electrostatic coating machine |
| JP5653875B2 (en) * | 2011-09-28 | 2015-01-14 | 本田技研工業株式会社 | Painting equipment |
| US8851397B1 (en) * | 2013-11-14 | 2014-10-07 | Efc Systems, Inc. | Bell cup atomizer having improved cleaning capability |
| CN105478263B (en) * | 2016-01-18 | 2018-10-19 | 杨福毅 | A kind of electrostatic atomiser |
| CN107321569A (en) * | 2017-06-14 | 2017-11-07 | 余雷 | A kind of vane type washes pump certainly without blocking |
| CN107486358A (en) * | 2017-10-11 | 2017-12-19 | 京东方科技集团股份有限公司 | Coating apparatus |
| US20230001434A1 (en) * | 2019-12-23 | 2023-01-05 | Kawasaki Motors, Ltd. | Coating liquid mixing device, and coating liquid mixing method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4928883A (en) * | 1986-06-26 | 1990-05-29 | The Devilbiss Company | Air turbine driven rotary atomizer |
| JPH1128391A (en) * | 1997-07-10 | 1999-02-02 | Abb Ind Kk | Coating device with rotary atomizing head |
-
2003
- 2003-12-19 JP JP2003422124A patent/JP4347036B2/en not_active Expired - Lifetime
-
2004
- 2004-12-17 CN CNB2004101013541A patent/CN1326631C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4928883A (en) * | 1986-06-26 | 1990-05-29 | The Devilbiss Company | Air turbine driven rotary atomizer |
| JPH1128391A (en) * | 1997-07-10 | 1999-02-02 | Abb Ind Kk | Coating device with rotary atomizing head |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005177607A (en) | 2005-07-07 |
| CN1628914A (en) | 2005-06-22 |
| JP4347036B2 (en) | 2009-10-21 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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Granted publication date: 20070718 |