CN111334737A - Photovoltaic solder strip tin plating system and tin plating method - Google Patents
Photovoltaic solder strip tin plating system and tin plating method Download PDFInfo
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- CN111334737A CN111334737A CN202010283586.2A CN202010283586A CN111334737A CN 111334737 A CN111334737 A CN 111334737A CN 202010283586 A CN202010283586 A CN 202010283586A CN 111334737 A CN111334737 A CN 111334737A
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- tin
- strip
- photovoltaic
- photovoltaic solder
- melting furnace
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/08—Tin or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
- C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
- C23C2/18—Removing excess of molten coatings from elongated material
- C23C2/20—Strips; Plates
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
Abstract
The invention belongs to the field of photovoltaic solder strips, and discloses a photovoltaic solder strip tinning system and a tinning method, wherein the tinning system comprises a rack, and a tin melting furnace and a tin layer adjusting device are arranged on the rack; wherein, be provided with the fabric wheel in the tin melting furnace, the top that lies in the fabric wheel in the frame is provided with tin layer adjusting device, and photovoltaic solder strip is in proper order through fabric wheel and tin layer adjusting device in the tin melting furnace. The tin plating system adopts the pneumatic conveyor to uniformly coat a layer of tin-lead alloy on the surface of the copper strip, and can realize the adjustment of the thickness of the tin plating layer on the surface of the photovoltaic welding strip by adjusting the pressure of compressed air at the air inlet of the pneumatic conveyor, and the thickness of the unilateral plating layer of the photovoltaic welding strip can be controlled between 10 and 30 mu m, so that the thickness of the tin plating layer of the photovoltaic welding strip is kept consistent, and the stability of the surface quality of the photovoltaic welding strip product is improved; the tin plating method is simple and easy to operate and implement, and the thickness of the tin plating layer of the photovoltaic solder strip is controlled by adjusting the on-off and flow of compressed air.
Description
Technical Field
The invention relates to the field of photovoltaic solder strips, in particular to a photovoltaic solder strip tin plating system and a photovoltaic solder strip tin plating method.
Background
At present, in the photovoltaic industry, two production modes of photovoltaic solder strips on the market are mainly adopted, wherein one mode is electroplating; another is hot dip plating. The electroplating cost is high, the market share in the photovoltaic industry is low, the mainstream hot dip plating cost in the market is low, and the electroplating method has absolute advantages in the photovoltaic industry. A core process in the production process of hot dipping is tinning, and the tinning process influences important indexes such as the coating thickness and the surface quality of a product.
At present, in the production of hot dip coating photovoltaic solder strips, the tin plating mode is mainly an air knife method, namely gas wiping. The thickness and the surface quality of the coating on the surface of the photovoltaic solder strip are mainly determined by the size of the installation position of the air knife, the installation angle, the air pressure and the flow of compressed air and the like. The different production speeds of equipment all need adjust different positions and guarantee product quality's stability, and the production operation degree of difficulty is great, and it is higher to the technical merit requirement of producing the staff. Therefore, the photovoltaic solder strip product produced by the existing air knife wiping method has insufficient quality stability and higher rejection rate.
Disclosure of Invention
In order to solve the problems, the invention provides a photovoltaic solder strip tinning system and a tinning method, wherein the tinning system adopts a pneumatic conveyor to uniformly coat a layer of tin-lead alloy on the surface of a copper strip, the thickness of a tinning layer on the surface of the photovoltaic solder strip can be adjusted by adjusting the pressure of compressed air at an air inlet of the pneumatic conveyor, the thickness of a single-side coating of the photovoltaic solder strip can be controlled between 10 and 30 microns, the thickness of the tinning layer of the photovoltaic solder strip is kept consistent, and the stability of the surface quality of a photovoltaic solder strip product is improved; the tin plating method is simple and easy to operate and implement, and the thickness of the tin plating layer of the photovoltaic solder strip is controlled by adjusting the on-off and flow of compressed air.
In order to achieve the above object, the present invention adopts the following technical solutions.
The photovoltaic solder strip tinning system comprises a rack, wherein a tin melting furnace and a tin layer adjusting device are arranged on the rack; the photovoltaic welding strip tin melting furnace is characterized in that a line pressing wheel is arranged in the tin melting furnace, a tin layer adjusting device is arranged above the line pressing wheel on the rack, the photovoltaic welding strip sequentially passes through the line pressing wheel and the tin layer adjusting device in the tin melting furnace, and the tin layer adjusting device is used for adjusting the thickness of a tin coating of the photovoltaic welding strip.
Preferably, the tin layer adjusting device comprises a pneumatic conveyor, and the pneumatic conveyor is provided with an air inlet, an air outlet and a material inlet; the pneumatic conveyors are fixed on the rack in a bilateral symmetry mode, and the photovoltaic solder strips vertically penetrate through the material inlets of the two pneumatic conveyors.
Preferably, the tin layer adjusting device further comprises a constant temperature pipeline, the air outlet of each pneumatic conveyor is communicated with one end of the constant temperature pipeline, and the other end of the constant temperature pipeline faces the tin melting furnace.
(II) a photovoltaic solder strip tinning method, which comprises the following steps:
step 1, a tin-lead alloy is filled in a tin melting furnace, a copper strip penetrates through a wire pressing wheel in the tin melting furnace, the running direction of the copper strip is changed from an oblique direction to a vertical direction by the wire pressing wheel, and the tin-lead alloy is adhered to the surface of the copper strip to form an initial photovoltaic welding strip;
and 2, vertically passing the initial photovoltaic welding strip through a tin layer adjusting device, and sucking away the redundant tin-lead alloy on the surface of the initial photovoltaic welding strip by the tin layer adjusting device, so that the thickness of a tin coating on the surface of the initial photovoltaic welding strip is uniform, and the tin plating of the photovoltaic welding strip is completed.
Preferably, in the step 2, the tin layer adjusting device comprises a pneumatic conveyor and a constant temperature pipeline, compressed air enters from an air inlet of the pneumatic conveyor and is discharged from an air outlet, a negative pressure zone is formed at a material inlet of the pneumatic conveyor, redundant tin-lead alloy on the surface of the initial photovoltaic welding strip at the material inlet is sucked in and is discharged into the constant temperature pipeline along with the compressed air, and the constant temperature pipeline reflows the tin-lead alloy into the tin melting furnace.
Preferably, in the step 1, the temperature of the tin melting furnace is 220-235 ℃.
Preferably, in the step 1, the diameter of the wire pressing wheel is 100 mm-120 mm, and the width of the wire pressing wheel is 0.9 mm-8 mm.
Preferably, in the step 2, the pressure of the compressed air is 0.3 to 0.5 MPa.
Preferably, in the step 2, the temperature of the constant temperature pipeline is 180-230 ℃.
Preferably, in the step 2, the thickness of the tin plating layer on the surface of the photovoltaic solder strip is 10 to 30 μm.
Compared with the prior art, the invention has the beneficial effects that:
1) according to the photovoltaic solder strip tin plating system, the pneumatic conveyor is adopted to suck away the redundant tin-lead alloy on the surface of the photovoltaic solder strip and adjust the thickness of the tin plating layer of the photovoltaic solder strip, the pneumatic conveyor can form negative pressure values with different sizes by inputting compressed air with different pressures and flows, and the negative pressure values can drive the redundant tin-lead alloy to flow back into the constant temperature pipeline and further flow into the tin melting furnace. The surface of the photovoltaic welding strip can be uniformly coated with a layer of tin-lead alloy by adopting a pneumatic conveyor, and the thickness of a single-side coating can be adjusted between 10 and 30 micrometers.
2) Tin-lead alloy on the surface of the photovoltaic solder strip sucked away by the pneumatic conveyor can be kept in a liquid state by adopting a constant temperature pipeline and flows back to the tin melting furnace for recycling, so that the utilization rate of the tin-lead alloy in the tin melting furnace is improved.
Drawings
The invention is described in further detail below with reference to the figures and specific embodiments.
FIG. 1 is a schematic structural view of a photovoltaic solder strip tinning system of the present invention;
fig. 2 is an enlarged view of the tin layer conditioning device of fig. 1.
In the above figures: 1, a tin melting furnace; 2, a wire pressing wheel; 3, a pneumatic conveyer; 301 air inlet; 302 air outlet; 303, a material inlet; 4, a constant temperature pipeline; 5 tin-lead alloy; 6 photovoltaic solder strip.
Detailed Description
Referring to fig. 1-2, a photovoltaic solder strip tinning system according to an embodiment of the present disclosure includes a frame, on which a tin melting furnace 1 and a tin layer adjusting device are disposed; wherein, be provided with fabric wheel 2 in the molten tin stove 1, be located in the frame the top of fabric wheel 2 is provided with tin layer adjusting device, and photovoltaic solder strip 6 passes through fabric wheel 2 and the tin layer adjusting device in molten tin stove 1 in proper order, tin layer adjusting device is used for adjusting the thickness of photovoltaic solder strip 6 tin coating.
Specifically, the photovoltaic solder strip tin plating system is used on the solder strip tin plating all-in-one machine, and the tin layer adjusting device comprises a pneumatic conveyor 3 and a constant temperature pipeline 4, wherein the pneumatic conveyor 3 is provided with an air inlet 301, an air outlet 302 and a material inlet 303, and the material inlet 303 faces upwards and is used for blowing compressed air; the pneumatic conveyors 3 are symmetrically fixed on the rack, the photovoltaic solder strip 6 vertically penetrates between the material inlets 303 of the two pneumatic conveyors 3, and the pneumatic conveyors 3 are used for sucking away the redundant tin-lead alloy 5 on the surfaces of the two sides of the photovoltaic solder strip 6. The air outlet 302 of each pneumatic conveyor 3 is communicated with one end of a constant temperature pipeline 4, and the other end of the constant temperature pipeline 4 faces the tin melting furnace 1.
(II) a photovoltaic solder strip tinning method, which comprises the following steps:
step 1, a tin-lead alloy 5 is filled in a tin melting furnace 1, a copper strip penetrates through a wire pressing wheel 2 in the tin melting furnace 1 at a certain running speed, the running direction of the copper strip is changed from the inclined direction to the vertical direction by the wire pressing wheel 2, the copper strip runs from bottom to top, and a large amount of tin-lead alloy 5 adheres to the surfaces of two sides when the copper strip passes through the tin melting furnace 1, so that an initial photovoltaic welding strip 6 is formed.
Specifically, the tin melting furnace 1 is mainly used for storing tin-lead alloy 5 and has a constant temperature control function. Wherein the melting point of the tin-lead alloy 5 is more than or equal to 183 ℃, in normal use, in order to ensure the uniformity of tin plating on the surface of the photovoltaic solder strip 6 and to have the best soldering capability, the temperature of the tin melting furnace 1 is usually set to be more than or equal to 220 ℃, and is generally between 220 ℃ and 235 ℃.
The tin-lead alloy 5 is an alloy solder, and the solid tin-lead alloy 5 is added into the tin melting furnace 1 and starts to melt when the temperature is more than or equal to 183 ℃.
The copper strip is made of oxygen-free copper with the trade marks of TU1 and TU 2. The base material of the photovoltaic welding strip 6 is oxygen-free copper, a layer of tin-lead alloy 5 is coated on the surface of the photovoltaic welding strip, and the tin-lead alloy 5 is uniformly coated on two sides of the copper strip and can be used for welding.
The wire pressing wheel 2 is a roller made of titanium alloy material, generally, the diameter of the wire pressing wheel is between 100mm and 120mm, the width of the wire pressing wheel is slightly wider than that of the photovoltaic welding strip 6, and therefore the width of the wire pressing wheel 2 is between 0.9mm and 8 mm.
And 2, vertically passing the initial photovoltaic solder strip 6 through a tin layer adjusting device, and sucking away the redundant tin-lead alloy 5 on the surface of the initial photovoltaic solder strip 6 by the tin layer adjusting device, so that the thickness of a tin coating on the surface of the initial photovoltaic solder strip 6 is uniform, and the tin coating of the photovoltaic solder strip 6 is finished.
Specifically, the tin layer adjusting device comprises a pneumatic conveyor 3 and a constant temperature pipeline 4, when compressed air enters an annular high-pressure cavity of the pneumatic conveyor, the compressed air is discharged to an air outlet 302 at a high speed through an internal physical structure, the high-speed airflow forms a negative pressure area (vacuum) at a material inlet 303 of the pneumatic conveyor 3, and because the negative pressure on the pneumatic conveyor 3 is greater than the adhesive force of tin-lead alloy 5 on the surface of a copper strip, a large amount of tin-lead alloy 5 on the surface of the copper strip can be sucked away by the pneumatic conveyor 3 and discharged into the constant temperature pipeline 4 along with the compressed air, the constant temperature pipeline 4 enables the tin-lead alloy 5 to flow back into the tin melting furnace 1, and the tin-lead alloy 5 can be recycled. By adopting the air flow conveying mode, the conveying start, stop and speed are realized by adjusting the switch and the flow of the compressed air, and the control is very easy. After the photovoltaic solder strip 6 passes through the thickness of the tin coating adjusted by the tin coating adjusting device, the photovoltaic solder strip is cooled by a conventional cooling air duct and penetrates out of the main driving wheel and the outgoing line passing wheel.
The thickness of the tin coating of the tin-lead alloy 5 on the surface of the copper strip mainly depends on the negative pressure of the pneumatic conveyor 3, the negative pressure of the pneumatic conveyor 3 is derived from the pressure of compressed air, and when the pressure of the compressed air is adjusted between 0.3MPa and 0.5MPa, the tin coating on the surface of the copper strip is thinned from thick, so that the tin coating of the tin-lead alloy 5 on the surface of the copper strip is uniformly coated. In the finally obtained photovoltaic solder strip 6, the tin-lead alloy 5 with the thickness of 10-30 mu m is uniformly coated on two surfaces of the copper strip; the photovoltaic solder strip 6 is divided into an interconnection strip and a bus bar, the width of the interconnection strip is between 0.9mm and 2.5mm, and the width of the bus bar is between 5mm and 8 mm.
The constant temperature pipeline 4 is a self-heating pipeline, an electric heating wire is arranged in the constant temperature pipeline 4, the temperature of the constant temperature pipeline 4 is controlled to be 180-230 ℃, and the constant temperature pipeline is still in a liquid state when the tin-lead alloy 5 flows back.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such changes and modifications of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such changes and modifications.
Claims (10)
1. The photovoltaic solder strip tin plating system is characterized by comprising a rack, wherein a tin melting furnace (1) and a tin layer adjusting device are arranged on the rack; wherein, be provided with fabric wheel (2) in tin melting furnace (1), be located in the frame the top of fabric wheel (2) is provided with tin layer adjusting device, and photovoltaic solder strip (6) are in proper order through fabric wheel (2) and the tin layer adjusting device in tin melting furnace (1), tin layer adjusting device is used for adjusting the thickness of photovoltaic solder strip (6) tin coating.
2. The photovoltaic solder strip tinning system of claim 1, characterized in that the tin layer conditioning device comprises a pneumatic conveyor (3), the pneumatic conveyor (3) having an air inlet (301), an air outlet (302) and a material inlet (303); the pneumatic conveyors (3) are symmetrically fixed on the rack left and right, and the photovoltaic solder strips (6) vertically penetrate through the material inlets (303) of the two pneumatic conveyors (3).
3. The photovoltaic solder strip tinning system of claim 2, characterized in that the tin layer conditioning device further comprises a thermostatic line (4), the air outlet (302) of each pneumatic conveyor (3) being in communication with one end of the thermostatic line (4), the other end of the thermostatic line (4) facing the tin melting furnace (1).
4. A photovoltaic solder strip tin plating method is characterized by comprising the following steps:
step 1, a tin-lead alloy is filled in a tin melting furnace, a copper strip penetrates through a wire pressing wheel in the tin melting furnace, the running direction of the copper strip is changed from an oblique direction to a vertical direction by the wire pressing wheel, and the tin-lead alloy is adhered to the surface of the copper strip to form an initial photovoltaic welding strip;
and 2, vertically passing the initial photovoltaic welding strip through a tin layer adjusting device, and sucking away the redundant tin-lead alloy on the surface of the initial photovoltaic welding strip by the tin layer adjusting device, so that the thickness of a tin coating on the surface of the initial photovoltaic welding strip is uniform, and the tin plating of the photovoltaic welding strip is completed.
5. The method for tin plating a photovoltaic solder strip according to claim 4, wherein in step 2, the tin layer adjusting device comprises a pneumatic conveyor and a constant temperature pipeline, compressed air enters from an air inlet of the pneumatic conveyor and is discharged from an air outlet, a negative pressure zone is formed at a material inlet of the pneumatic conveyor, excess tin-lead alloy on the surface of the photovoltaic solder strip at the material inlet is sucked in and discharged into the constant temperature pipeline along with the compressed air, and the constant temperature pipeline returns the tin-lead alloy to the tin melting furnace.
6. The method for tin plating a photovoltaic solder ribbon according to claim 4, wherein the temperature of the tin melting furnace in step 1 is 220 ℃ to 235 ℃.
7. The method for tin plating a photovoltaic solder ribbon according to claim 4, wherein in step 1, the diameter of the wire-pressing wheel is 100mm to 120mm, and the width of the wire-pressing wheel is 0.9mm to 8 mm.
8. The method for tin plating a photovoltaic solder ribbon according to claim 5, wherein in the step 2, the pressure of the compressed air is 0.3MPa to 0.5 MPa.
9. The method for tin plating a photovoltaic solder ribbon according to claim 5, wherein the temperature of the constant temperature pipe is 180 ℃ to 230 ℃.
10. The method for plating a tin on a photovoltaic solder ribbon according to claim 5, wherein in the step 2, the thickness of the tin plating layer on the surface of the photovoltaic solder ribbon is 10 μm to 30 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010283586.2A CN111334737A (en) | 2020-04-13 | 2020-04-13 | Photovoltaic solder strip tin plating system and tin plating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010283586.2A CN111334737A (en) | 2020-04-13 | 2020-04-13 | Photovoltaic solder strip tin plating system and tin plating method |
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| CN111334737A true CN111334737A (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010283586.2A Pending CN111334737A (en) | 2020-04-13 | 2020-04-13 | Photovoltaic solder strip tin plating system and tin plating method |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4385083A (en) * | 1980-08-25 | 1983-05-24 | Applied Magnetics Corporation | Apparatus and method for forming a thin film of coating material on a substrate having a vacuum applied to the edge thereof |
| JPS63203758A (en) * | 1987-02-18 | 1988-08-23 | Hitachi Ltd | Device for preventing edge overcoat of metal hot dipping device |
| JPH02194690A (en) * | 1989-01-24 | 1990-08-01 | Toshiba Corp | Solder coating device for printed board |
| JPH04206592A (en) * | 1990-11-30 | 1992-07-28 | Fujitsu Ltd | Liquid removing method and device of clamp provided to loading device and dryer |
| WO2008149218A2 (en) * | 2007-06-08 | 2008-12-11 | Danieli & C. Officine Meccaniche S.P.A. | Method and device for controlling the thickness of coating of a flat metal product |
| CN102154605A (en) * | 2010-02-11 | 2011-08-17 | 上海胜佰太阳能科技有限公司 | Production process of tin-coated alloy band for solar cell |
| CN205576254U (en) * | 2016-01-26 | 2016-09-14 | 西安泰力松新材料股份有限公司 | Photovoltaic solder strip tinning stack |
| CN209160951U (en) * | 2018-06-04 | 2019-07-26 | 福建正盛无机材料股份有限公司 | White carbon black powder Pneumatic conveyer |
-
2020
- 2020-04-13 CN CN202010283586.2A patent/CN111334737A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4385083A (en) * | 1980-08-25 | 1983-05-24 | Applied Magnetics Corporation | Apparatus and method for forming a thin film of coating material on a substrate having a vacuum applied to the edge thereof |
| JPS63203758A (en) * | 1987-02-18 | 1988-08-23 | Hitachi Ltd | Device for preventing edge overcoat of metal hot dipping device |
| JPH02194690A (en) * | 1989-01-24 | 1990-08-01 | Toshiba Corp | Solder coating device for printed board |
| JPH04206592A (en) * | 1990-11-30 | 1992-07-28 | Fujitsu Ltd | Liquid removing method and device of clamp provided to loading device and dryer |
| WO2008149218A2 (en) * | 2007-06-08 | 2008-12-11 | Danieli & C. Officine Meccaniche S.P.A. | Method and device for controlling the thickness of coating of a flat metal product |
| CN102154605A (en) * | 2010-02-11 | 2011-08-17 | 上海胜佰太阳能科技有限公司 | Production process of tin-coated alloy band for solar cell |
| CN205576254U (en) * | 2016-01-26 | 2016-09-14 | 西安泰力松新材料股份有限公司 | Photovoltaic solder strip tinning stack |
| CN209160951U (en) * | 2018-06-04 | 2019-07-26 | 福建正盛无机材料股份有限公司 | White carbon black powder Pneumatic conveyer |
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Application publication date: 20200626 |
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