CN102039249A - Spraying device - Google Patents

Spraying device Download PDF

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Publication number
CN102039249A
CN102039249A CN2010105029239A CN201010502923A CN102039249A CN 102039249 A CN102039249 A CN 102039249A CN 2010105029239 A CN2010105029239 A CN 2010105029239A CN 201010502923 A CN201010502923 A CN 201010502923A CN 102039249 A CN102039249 A CN 102039249A
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CN
China
Prior art keywords
liquid
jet head
jet
substrate
jet device
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Pending
Application number
CN2010105029239A
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Chinese (zh)
Inventor
陈龙成
李国祯
杨翔能
陈勤达
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EIDP Inc
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EI Du Pont de Nemours and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Priority to CN2010105029239A priority Critical patent/CN102039249A/en
Publication of CN102039249A publication Critical patent/CN102039249A/en
Pending legal-status Critical Current

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Abstract

The invention provides a spraying device for an image transferring process, comprising at least more than one spray head, liquid is supplied to each spray head so that a layer of liquid membrane is sprayed on a substrate through the spray heads. In addition, the invention provides a spraying device for double liquids, the double liquids mixed by liquid and gas is sprayed on a substrate by using at least more than one spray head of the spraying device to form a layer of liquid membrane, and thus a layer of thinner and more uniform liquid membrane is formed.

Description

Liquid-jet device
Technical field
The present invention relates to a kind of liquid-jet device, relate to a kind of image transfer that is used in particular and spraying one deck liquid film on the substrate to increase the liquid-jet device of filling out the property covered between substrate and the follow-up pressing dry film photoresist thereon.
Background technology
Printed circuit board (PCB) (Printed Circuit Board is called for short PCB) is according to circuit design the electric wiring of connecting circuit part to be depicted as the wiring figure, and then makes electric conductor reappear the circuit board that is constituted on insulator in modes such as the machining of designing institute appointment, surface treatments; In other words, printed circuit board (PCB) is a collocation electronic component substrate before.The effect of described series products be with every electronic component with the formed electronic circuit of circuit board, bring into play the function of every electronics spare part, to reach the purpose that signal is handled.Because the quality of printed circuit board (PCB) designing quality, not only directly influence the reliability of electronic product, but the also performance of left and right sides system product integral body and competitiveness.Copper Foil substrate (Copper Clad Laminate is called for short CCl) then is a key basic material of making printed circuit board (PCB), it is a laminated plates of utilizing insulating paper, glass fabric or other fibrous material to be formed by stacking through the bonding sheet (Prepreg) of resin impregnation, covers in single or double to add Copper Foil and gain the name under HTHP.And the manufacturing process of circuit board to be technology such as application of printed, photograph, etching and plating make accurate distribution, as supporting the assembling base that circuit continues mutually between electronic component and the part.Therefore, the distribution formation technology of densification and multiple stratification becomes the main flow of printed circuit board (PCB) development of manufacturing.
Below with the production method of the line pattern on the diagrammatic illustration printed circuit board (PCB).At first, the Copper Foil substrate is cut into the size that is fit to processing.Next, usually need with brushing, microetch the Copper Foil on the substrate is done suitable roughening treatment earlier, with as the preparation before the press mold.Then, in the mode of roll extrusion the driving fit of dry film photoresist is attached on it with suitable temperature and pressure again.Afterwards, the Copper Foil substrate that posts the dry film photoresist sent in the ultraviolet exposure machine expose, photoresist can produce polymerisation (dry film in described zone is retained at last in after a while development, erosion copper step and is used as etching down and hinders agent) after the egative film transmission region is subjected to ultraviolet ray irradiation, and the circuit image on the egative film is passed on the plate face dry film photoresist.After tearing the protection glued membrane on the face off, earlier with Na 2CO 3Solvent is not removed by the zone development of illumination as yet face, uses HCl/H again 2O 2The Copper Foil erosion removal that mixed solvent will expose out is to form required line pattern.
Wherein, the dry film photoresist is to be applied to sensitization raw material important on the image transfer of printed circuit board circuitry, and it can clearly be reflected at designed accurate circuit on the circuit board, can produce the substrate with high density and frivolous sandwich construction.Yet, in the process of roll extrusion dry film photoresist, might make the dry film photoresist closely to be attached on the substrate because of the factors such as slight void that produced in external dust or the roll extrusion process.The not good problem of this attaching property will have influence on the precision of successive image shifting process, and then reduces the yield rate of made printed circuit board (PCB).
Summary of the invention
Because the problems referred to above the invention provides a kind of liquid-jet device that is applied to image transfer.Described liquid-jet device sprays the last layer liquid film on substrate, with the property covered of filling out between increase substrate and follow-up pressing dry film photoresist thereon, and then the precision of lifting successive image shifting process.
The invention provides a kind of liquid-jet device of single fluid.Described liquid-jet device is used for image transfer, and it comprises at least more than one jet head.Fluid is provided in each jet head, to spray one deck liquid film by described jet head on substrate.
In an embodiment of the present invention, described jet head comprises a plurality of second jet head of a plurality of first jet head and relative configuration with described first jet head, the distance of being separated by between described first jet head and second jet head makes the substrate can be by between described first jet head and second jet head.
In an embodiment of the present invention, the distance between described first jet head and the substrate equals the distance between described second jet head and the substrate in fact.
In an embodiment of the present invention, the distance between each first jet head and each second jet head and the substrate is between 10~200 millimeters.
In an embodiment of the present invention, described liquid-jet device further comprises auxiliary wheel, and described auxiliary wheel is arranged at a side of described jet head, is suitable for guiding substrate by described jet head.
In an embodiment of the present invention, described liquid-jet device further comprises and contains liquid roller unit, describedly contains the opposite side that liquid roller unit is arranged at described jet head.
In an embodiment of the present invention, described liquid film is a moisture film.
In an embodiment of the present invention, by the average grain diameter of the liquid of each jet head ejection between 100~400 microns.
In an embodiment of the present invention, be about room temperature~60 ℃ by the temperature of the liquid of each described jet head ejection.
In an embodiment of the present invention, the fluid pressure that imports each jet head is about 1~5kg/cm 2
In an embodiment of the present invention, the fluid pressure that imports each jet head preferably is about 2kg/cm 2
The present invention provides a kind of liquid-jet device of two-fluid in addition.Described liquid-jet device is used for image transfer, and it comprises at least more than one hydrojet unit.The jet head that each hydrojet unit includes first inlet duct, second inlet duct and is connected with first inlet duct and second inlet duct.Liquid and gas are directed into respectively in first inlet duct and second inlet duct, and through mixing for a plurality of vaporific liquid pearls and by described jet head ejection, with spraying one deck liquid film on substrate.
In an embodiment of the present invention, described jet head comprises a plurality of second jet head of a plurality of first jet head and relative configuration with described first jet head, the distance of being separated by between described first jet head and second jet head makes the substrate can be by between described first jet head and second jet head.
In an embodiment of the present invention, the distance between described first jet head and the substrate equals the distance between described second jet head and the substrate in fact.
In an embodiment of the present invention, the distance between each first jet head and each second jet head and the substrate is between 10~200 millimeters.
In an embodiment of the present invention, described liquid-jet device further comprises auxiliary wheel, and described auxiliary wheel is arranged at a side of described jet head, is suitable for guiding substrate by described jet head.
In an embodiment of the present invention, described liquid-jet device further comprises and contains liquid roller unit, describedly contains the opposite side that liquid roller unit is arranged at described jet head.
In an embodiment of the present invention, described liquid film is a moisture film.
In an embodiment of the present invention, by the average grain diameter of the liquid of each jet head ejection between 20~100 microns.
In an embodiment of the present invention, be about room temperature~60 ℃ by the temperature of the liquid of each described jet head ejection.
In an embodiment of the present invention, liquid imports first inlet duct of each jet head with siphon mode.
In an embodiment of the present invention, liquid imports first inlet duct of each jet head with hydraulic way.
In an embodiment of the present invention, liquid is about 1~5kg/cm with the pressure that hydraulic way imports first inlet duct of each jet head 2
In an embodiment of the present invention, the gas pressure that imports second inlet duct of each jet head is about 0.1~5kg/cm 2
Liquid-jet device of the present invention is mainly used in the image transfer, on the surface of substrate, spray the last layer liquid film by described liquid-jet device, with the property covered of filling out between increase substrate and follow-up pressing dry film photoresist thereon, and then avoid because of the not good problem that causes the decrease in yield of substrate of attaching property between substrate and the dry film.
Except the spraying of single fluid, the present invention also provides the two-fluid spraying that is mixed by liquid and gas, forming thinner and more uniform liquid film on substrate, and then reaches between substrate and the dry film attaching property more closely.
Description of drawings
Fig. 1 is the schematic perspective view according to the liquid-jet device of the first embodiment of the present invention;
Fig. 2 A and Fig. 2 B are respectively and install auxiliary wheel and the schematic perspective view that contains liquid roller unit on the not homonymy of the liquid-jet device shown in Fig. 1 additional; And
Fig. 3 is the schematic perspective view of liquid-jet device according to a second embodiment of the present invention.
The specific embodiment
Fig. 1 is the schematic perspective view according to the liquid-jet device of the first embodiment of the present invention.Described liquid-jet device 100 is applied in the image transfer (for example printed circuit board (PCB) Images shifting process), and is used to provide the spraying of fluid.When practical application, mainly be to make substrate (for example Copper Foil substrate, glass substrate etc.) 200 by described liquid-jet device 100, utilize liquid-jet device 100 on the surface of substrate 200, to spray the last layer liquid film, to increase the property covered of filling out between substrate 200 and the follow-up pressing dry film photoresist (not shown) thereon.
Please refer to shown in Figure 1ly, what described liquid-jet device 100 comprised at least more than one carries out the jet head 110 of hydrojet program to described substrate 200.In described embodiment, described jet head 110 comprises a plurality of first jet head 110a and a plurality of second jet head 110b that is the arrangement of two rows form, described second jet head 110b and the described first jet head 110a relatively dispose, and carry out the hydrojet program with the upper and lower surface to substrate 200 simultaneously.Yet the user also can only be provided with row's jet head according to its user demand, to carry out the hydrojet program on the single surface of substrate.The present invention does not impose any restrictions for the quantity and the arrangement mode thereof of jet head.
By among the figure as can be known: the distance of being separated by between described first jet head 110a and the described second jet head 110b makes the substrate 200 can be by between described first jet head 110a and the described second jet head 110b.Basically, the distance between described first jet head 110a and the substrate 200 equals the distance between described second jet head 110b and the substrate 200 in fact.Further, the distance between each first jet head 110a and each second jet head 110b and the substrate 200 is between 10~200 millimeters, to reach preferred hydrojet effect.
When practical operation, fluid (for example: water) be provided in each jet head 110, (for example: moisture film) spray one deck liquid film to utilize described jet head 110 on the surface of substrate 200.So, when follow-up pressing dry film, can increase the property covered of filling out between substrate 200 and the dry film by described liquid film, to solve because of the not good problem that has influence on the precision of image transfer of the attaching of dry film.
In general, the fluid that is supplied to each jet head 110 is a water, can also be the fluid of other kind, and the present invention is not limited.And in an embodiment of the present invention, be about 60 ℃ by the preferred temperature of the liquid of each jet head 110 ejections.In addition, by the average grain diameter of the liquid of each jet head 110 ejections between 100~400 microns.In an embodiment of the present invention, the fluid pressure that imports each jet head 110 is about 1~5kg/cm 2Further, the fluid pressure that imports each jet head 110 preferably is about 2kg/cm 2The preferred operations parameter that above operating condition is drawn after testing for the inventor, however the invention is not restricted to the aforesaid operations condition.
Fig. 2 A and Fig. 2 B are respectively and install auxiliary wheel and the schematic perspective view that contains liquid roller unit on the not homonymy of the liquid-jet device shown in Fig. 1 additional.In an embodiment of the present invention, please refer to shown in Fig. 2 A, described liquid-jet device 100 is provided with auxiliary wheel 120 in a side of described jet head 110, and substrate 200 can pass through described auxiliary wheel 120 earlier, and guides by described jet head 110 by described auxiliary wheel 120.
In another embodiment of the present invention, please refer to shown in Fig. 2 B, described liquid-jet device 100 is provided with at the opposite side of described jet head 110 and contains liquid roller unit 130, and the described surface-coated that contains liquid roller unit 130 has liquid (for example water).Substrate 200 can to form liquid film on the upper and lower surface of substrate 200, then, make substrate 200 by containing liquid roller unit 130, to be coated with liquid film on the surface of guaranteeing substrate 200 fully earlier by described jet head 110 again.The user can be provided with auxiliary wheel 120 (ginseng Fig. 2 A) according to its user demand and contain one or both in the liquid roller unit 130 in liquid-jet device 100, whether the present invention does not impose any restrictions for auxiliary wheel 120 and the setting that contains liquid roller unit 130.
Fig. 3 is the schematic perspective view of liquid-jet device according to a second embodiment of the present invention.Please refer to shown in Figure 3ly, described liquid-jet device 300 is used for the spraying of two-fluid, and it comprises at least more than one hydrojet unit 310.The jet head 314 that each described hydrojet unit 310 includes the first inlet duct 312a, the second inlet duct 312b and is connected with the first inlet duct 312a and the second inlet duct 312b.Liquid (for example: water) and gas (for example: air) be directed into respectively among the first inlet duct 312a and the second inlet duct 312b, and through mixing to form a plurality of vaporific liquid pearls and to spray, (for example: moisture film) with spraying one deck liquid film on the substrate (not shown) by each jet head 314.Because can form the littler vaporific liquid pearl of particle diameter after liquid mixes with gas, therefore, formed liquid film will be more even, and thickness can be thinner, with the attaching between further increase substrate and the follow-up pressing dry film thereon.
In an embodiment of the present invention, the preferred temperature by the liquid of each jet head 314 ejections is about 60 ℃.In addition, by the average grain diameter of the liquid of each jet head 314 ejections between 20~100 microns.Liquid can siphon or the mode of hydraulic pressure import the first inlet duct 312a of each jet head 314.When liquid imported the first inlet duct 312a of each jet head 314 in the mode of hydraulic pressure, the pressure that liquid imports the first inlet duct 312a of each jet head 314 was about 1~5kg/cm 2In an embodiment of the present invention, the gas pressure that imports the second inlet duct 312b of each jet head 314 is about 0.1~5kg/cm 2The preferred operations parameter that above operating condition is drawn after testing for the inventor, however the invention is not restricted to the aforesaid operations condition.
Because the auxiliary body of the structure configuration of thin portion, the operating parameter of described liquid-jet device 300 and the use of can arranging in pairs or groups thereof (for example: the auxiliary wheel 120 shown in Fig. 2 A) all identical with the liquid-jet device 100 shown in Fig. 1, so this no longer giving unnecessary details more.
In addition, the present invention also can form the spraying that the multithread body mixes by a plurality of inlet ducts are set in each jet head.Because its technological thought does not break away from aforesaid embodiment, therefore do not add to give unnecessary details at this.
In sum, liquid-jet device of the present invention is mainly used in the image transfer.On the surface of substrate, spray the last layer liquid film by described liquid-jet device, with the property covered of filling out between increase substrate and the follow-up pressing dry film photoresist thereon, and then avoid because of the not good problem that causes the decrease in yield of substrate of attaching property between substrate and the dry film.
In liquid-jet device of the present invention, (for example: spraying water), the present invention also mixes gas with liquid except single fluid, to form vaporific liquid pearl, and it is sprayed on the substrate, forming more even and thinner liquid film, and then reach better to fill out and cover effect.
By will more clearly understanding advantage of the present invention with reference to following example.
Example 1
In this example, the wet laminater of routine and two-fluid liquid-jet device more just can be found out photoresist fill out be layed onto the substrate with different bump height have how good.Conventional wet laminater uses a pair of sponge volume water layer is applied on the surface of substrate by the contact substrate.Two-fluid liquid-jet device of the present invention is more effective, states as mentioned.In this example, being used for gas-powered is 2kg/cm to the pressure of 314 the second inlet duct 312b of each jet head 2And under the gravity supplying mode of 40cm height with water-driven in the first inlet duct 312a of each jet head 314.
In this example, the substrate that will handle has some projections in its surface.The height of projection is respectively 4 μ m, 7 μ m and 14 μ m.The feed rate of described substrate is 1.5 meters/minute.After applying water, with the described substrate of dry film photoresist lamination so as to find out described substrate and described photoresist between fill out the property covered.
After test, both all have good performance to the substrate with following bump height to find wet laminater of described routine and described two-fluid liquid-jet device: 4 μ m and 7 μ m.That is to say, after using the moisture film coated substrate, the photoresist driving fit can be attached on the substrate with 4 μ m and 7 μ m bump height by conventional wet laminater or two-fluid liquid-jet device of the present invention.
Yet, after using the moisture film coated substrate, the photoresist driving fit can't be attached on the substrate with 14 μ m bump height by conventional wet laminater.On the contrary, after using the moisture film coated substrate, still the photoresist driving fit can be attached on the substrate with 14 μ m bump height by two-fluid liquid-jet device of the present invention.
Example 2
In this example, the dried laminater of routine, conventional wet laminater and two-fluid liquid-jet device of the present invention more just can be found out photoresist fill out be layed onto substrate have how good.
Conventional dried laminater is applied directly to the dry film photoresist on the substrate under the situation that does not at first apply moisture film.Conventional wet laminater and two-fluid liquid-jet device of the present invention are more effective, state as mentioned.
In this example, substrate is formed with 10 parallel projection lines with projection, and described projection has 14 μ m bump height.The projection line is perpendicular to the feed direction of substrate to laminater or two-fluid liquid-jet device of the present invention.At first by wet laminater or two-fluid liquid-jet device of the present invention with moisture film coated substrate (substrate that is used for dried laminater applies without moisture film).After applying moisture film, with dry film photoresist laminated substrates and follow it is exposed and develops.At last, the described substrate of etching is to form 10 parallel conductive electric wires thereon.Conductor wire for intersect and perpendicular to described projection line.Therefore, there are 100 crosspoints on the described conductor wire, check on described conductor wire that wherein 90 points are with the described conductor wire of having checked the whether abundant etching in zero defect ground.At conductor wire is that the wide and projection of 75 μ m is that 75 μ m are when wide, finding on the substrate that the dried laminater by routine is handled has 71 defectives in 90 checkpoints, finds 5 defectives and do not find defective on the substrate that wet laminater is handled by routine on the substrate of handling by two-fluid liquid-jet device of the present invention.At conductor wire is that the wide and projection of 85 μ m is that 75 μ m are when wide, finding on the substrate that the dried laminater by routine is handled has 46 defectives in 90 checkpoints, finds 1 defective and do not find defective on the substrate that wet laminater is handled by routine on the substrate of handling by two-fluid liquid-jet device of the present invention.

Claims (24)

1. liquid-jet device that is used for image transfer, it comprises:
At least more than one jet head, fluid are provided in each described jet head, to spray one deck liquid film by described jet head on substrate.
2. liquid-jet device according to claim 1, wherein said jet head comprises a plurality of second jet head of a plurality of first jet head and relative configuration with described first jet head, the distance of being separated by between described first jet head and described second jet head makes the described substrate can be by between described first jet head and described second jet head.
3. liquid-jet device according to claim 2, the distance between wherein said first jet head and the described substrate equals the distance between described second jet head and the described substrate in fact.
4. liquid-jet device according to claim 1, wherein the described distance between each described first jet head and each described second jet head and the described substrate is between 10~200 millimeters.
5. liquid-jet device according to claim 1, it further comprises auxiliary wheel, described auxiliary wheel is arranged at the side of described substrate by described jet head part, is suitable for guiding described substrate by described jet head.
6. liquid-jet device according to claim 1, it further comprises and contains liquid roller unit, describedly contains the side that liquid roller unit is arranged at described substrate row part away from described jet head.
7. liquid-jet device according to claim 1, wherein said liquid film are moisture film.
8. liquid-jet device according to claim 1, wherein by the average grain diameter of the liquid of each described jet head ejection between 100~400 microns.
9. liquid-jet device according to claim 1 wherein is about room temperature~60 ℃ by the temperature of the liquid of each described jet head ejection.
10. liquid-jet device according to claim 1, wherein the fluid pressure that imports each described jet head is about 1~5kg/cm 2
11. liquid-jet device according to claim 10, wherein the fluid described pressure that imports each described jet head preferably is about 2kg/cm 2
12. a liquid-jet device that is used for image transfer, it comprises:
At least more than one hydrojet unit, the jet head that each described hydrojet unit includes first inlet duct, second inlet duct and is connected with described first inlet duct and described second inlet duct, liquid and gas are directed into respectively in described first inlet duct and described second inlet duct, and through mixing, with spraying one deck liquid film on substrate for a plurality of vaporific liquid pearls and by described jet head ejection.
13. liquid-jet device according to claim 12, wherein said jet head comprises a plurality of second jet head of a plurality of first jet head and relative configuration with described first jet head, the distance of being separated by between described first jet head and described second jet head makes the described substrate can be by between described first jet head and described second jet head.
14. liquid-jet device according to claim 13, the distance between wherein said first jet head and the described substrate equals the distance between described second jet head and the described substrate in fact.
15. liquid-jet device according to claim 12, wherein the described distance between each described first jet head and each described second jet head and the described substrate is between 10~200 millimeters.
16. liquid-jet device according to claim 12, it further comprises auxiliary wheel, and described auxiliary wheel is arranged at the side of described substrate by described jet head part, is suitable for guiding described substrate by described jet head.
17. liquid-jet device according to claim 12, it further comprises and contains liquid roller unit, describedly contains the side that liquid roller unit is arranged at described substrate row part away from described jet head.
18. liquid-jet device according to claim 12, wherein said liquid film are moisture film.
19. liquid-jet device according to claim 12, wherein by the average grain diameter of the liquid of each described jet head ejection between 20~100 microns.
20. liquid-jet device according to claim 12 wherein is about room temperature~60 ℃ by the temperature of the liquid of each described jet head ejection.
21. liquid-jet device according to claim 12, wherein liquid imports described first inlet duct of each described jet head in the mode of siphon.
22. liquid-jet device according to claim 12, wherein liquid imports described first inlet duct of each described jet head in the mode of hydraulic pressure.
23. liquid-jet device according to claim 22, wherein liquid is about 1~5kg/cm with the pressure that hydraulic way imports described first inlet duct of each described jet head 2
24. liquid-jet device according to claim 12, wherein the gas pressure that imports described second inlet duct of each described jet head is about 0.1~5kg/cm 2
CN2010105029239A 2009-10-13 2010-09-28 Spraying device Pending CN102039249A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010105029239A CN102039249A (en) 2009-10-13 2010-09-28 Spraying device

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Application Number Priority Date Filing Date Title
CN200910179820.0 2009-10-13
CN200910179820 2009-10-13
CN2010105029239A CN102039249A (en) 2009-10-13 2010-09-28 Spraying device

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU462977B2 (en) * 1972-04-27 1975-07-10 Micro-Gen Equipment Corp. Method and apparatus for producing an insecticide or other chemical spray
US20030000465A1 (en) * 2001-06-29 2003-01-02 Kurt Eichinger Applicator device
CN1939601A (en) * 2003-04-10 2007-04-04 Hoya株式会社 Substrate processing system, coating apparatus, and coating method
CN1981943A (en) * 2006-05-17 2007-06-20 王斌 Method and housing for spraying sectional-materials into two colors
CN101072690A (en) * 2004-12-09 2007-11-14 松下电器产业株式会社 Method of transferring and liquid coating apparatus
CN101433888A (en) * 2008-11-14 2009-05-20 北京星和众工设备技术有限公司 Roll coating mechanism of flow painting type single sheet of metal board

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU462977B2 (en) * 1972-04-27 1975-07-10 Micro-Gen Equipment Corp. Method and apparatus for producing an insecticide or other chemical spray
US20030000465A1 (en) * 2001-06-29 2003-01-02 Kurt Eichinger Applicator device
CN1939601A (en) * 2003-04-10 2007-04-04 Hoya株式会社 Substrate processing system, coating apparatus, and coating method
CN101072690A (en) * 2004-12-09 2007-11-14 松下电器产业株式会社 Method of transferring and liquid coating apparatus
CN1981943A (en) * 2006-05-17 2007-06-20 王斌 Method and housing for spraying sectional-materials into two colors
CN101433888A (en) * 2008-11-14 2009-05-20 北京星和众工设备技术有限公司 Roll coating mechanism of flow painting type single sheet of metal board

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Application publication date: 20110504