CN107398413A - The Powder Electrostatic Coating Technology of metalwork - Google Patents
The Powder Electrostatic Coating Technology of metalwork Download PDFInfo
- Publication number
- CN107398413A CN107398413A CN201710617376.0A CN201710617376A CN107398413A CN 107398413 A CN107398413 A CN 107398413A CN 201710617376 A CN201710617376 A CN 201710617376A CN 107398413 A CN107398413 A CN 107398413A
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- CN
- China
- Prior art keywords
- powder
- workpiece
- metalwork
- coating
- coating technology
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
- B05D1/06—Applying particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/32—Processes for applying liquids or other fluent materials using means for protecting parts of a surface not to be coated, e.g. using stencils, resists
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/002—Pretreatement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0218—Pretreatment, e.g. heating the substrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
- B05D3/102—Pretreatment of metallic substrates
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses a kind of Powder Electrostatic Coating Technology of metalwork, comprise the following steps：1）Pre-treatment；2）Electrostatic spraying；3）Hot setting.By the above-mentioned means, the present invention have face coat uniformly, not bubbling, pit, coating adhesion be not strong, difficult for drop-off, uniform color.
Description
Technical field
The present invention relates to a kind of Powder Electrostatic Coating Technology of metalwork.
Background technology
The eighties in last century, with the rise of China's skyscraper, luxurious hall and bustling commercial street, aluminium section bar work
Industry develops rapidly by backbone of introduction of production line.Oxidation aluminium and electrolytic colouring technology are as building and the surface of decoration
Treatment technology obtains development quickly.But the electrolytic coloring of anode oxide film, it can only obtain from champagne wine and women-sensual pursuits to shallow/deep bronze
For color until black, color and luster is dull, can not meet the needs of people are to color.Subsequent occurrences of electrophoretic coating, liquid paint, are compound
The technique such as coloring (electrolytic coloring and dyeing combine) and electrostatic powder coating can obtain coloury aluminium.Wherein electrostatic powder
The advantages that last paint colors are abundant, favorable reproducibility, technology controlling and process are easy, and environmental effect is good, obtained sprayed product color and luster is various,
It is elegant in appearance, and disclosure satisfy that the protectiveness such as corrosion resistance, rotproofness, insulating properties.Therefore, the product that electrostatic powder coating obtains times
Favored by consumers in general.Although electrostatic powder coating process can obtain coloury aluminium, current electrostatic
Following defect during powder coating process be present：1) solidification temperature is uneven, different bin hardening times inconsistent is not led
Same model aluminium is caused aberration to be present；2) amount of dusting and time control inequality of dusting, cause coating thickness blocked up or excessively thin；3) spray
Phenomena such as film after painting easily produces tangerine peel or bubbling；4) surface pretreatment is sufficiently complete, the aluminium material surface shape after spraying
Into circular or ellipse pit；5) aluminium material surface partial coating is easy to fall off.
The content of the invention
The present invention solves the technical problem of：A kind of Powder Electrostatic Coating Technology of metalwork, face coat are provided
Uniformly, not bubbling, pit, coating adhesion be not strong, difficult for drop-off, uniform color.
In order to solve the above technical problems, one aspect of the present invention is：It is quiet to provide a kind of powder of metalwork
Electrospray technique, comprises the following steps：
（1）Surface preparation：Workpiece surface carries out chromaking or blasting treatment；
（2）Cover and cover：If some positions have not required coating on workpiece, Protection glue etc. can be used to cover up before preheating, to keep away
Exempt to spray coating；
（3）Preheating：Workpiece can be preheated to 180-200 DEG C；
（4）Spraying：In high-pressure electrostatic off field, podwer gun is connect into negative pole, workpiece grounding is that positive pole forms loop, and powder is by compression
Air is sprayed by spray gun carries negative electrical charge, is sprayed to by principle of opposite sex attraction on workpiece；
（5）Solidification：Workpiece after spraying, it is sent into drying room and heats, retain certain constant temperature time, to make powder completely solid
Change；
（6）Cleaning：After curing of coatings, protection, equating burr are removed；
（7）Examine：Check workpiece coating whether have drain spray, damage, pin bubble the defects of.
In a preferred embodiment of the present invention, the step 5）The temperature of middle heating is 180-200 DEG C.
In a preferred embodiment of the present invention, the step 5）Middle powder includes polyester, epoxy resin, accelerator, carbon
Sour barium, ultra-fine barium, titanium dioxide, levelling agent, brightener, Cu-Zn alloy powder, silver powder.
In a preferred embodiment of the present invention, the step 5）In plus certain constant temperature time be 15-20min.
The beneficial effects of the invention are as follows：Face coat uniformly, not bubbling, pit, coating adhesion be not strong, it is difficult for drop-off,
Uniform color.
Embodiment
It is described in detail with reference to presently preferred embodiments of the present invention, so that advantages and features of the invention can be more easy to
In being readily appreciated by one skilled in the art, apparent clearly defined so as to be made to protection scope of the present invention.
Embodiment one
A kind of Powder Electrostatic Coating Technology of metalwork, comprises the following steps：
（1）Surface preparation：Workpiece surface carries out chromaking or blasting treatment；
（2）Cover and cover：If some positions have not required coating on workpiece, Protection glue etc. can be used to cover up before preheating, to keep away
Exempt to spray coating；
（3）Preheating：Workpiece can be preheated to 180-200 DEG C；
（4）Spraying：In high-pressure electrostatic off field, podwer gun is connect into negative pole, workpiece grounding is that positive pole forms loop, and powder is by compression
Air is sprayed by spray gun carries negative electrical charge, is sprayed to by principle of opposite sex attraction on workpiece；
（5）Solidification：Workpiece after spraying, it is sent into drying room and heats, retain certain constant temperature time, to make powder completely solid
Change；
（6）Cleaning：After curing of coatings, protection, equating burr are removed；
（7）Examine：Check workpiece coating whether have drain spray, damage, pin bubble the defects of.
Further illustrate, the step 5）The temperature of middle heating is 180-200 DEG C, the step 5）Middle powder includes poly-
Ester, epoxy resin, accelerator, barium carbonate, ultra-fine barium, titanium dioxide, levelling agent, brightener, Cu-Zn alloy powder, silver powder, the step 5）
In plus certain constant temperature time be 15-20min.
Powdery paints borrows compressed air gas to be sent into spray gun by powder-supply system, in spray gun front end added with HV generator
Caused high pressure, due to corona discharge, intensive electric charge is produced in its vicinity, when powder is sprayed by rifle mouth, form band electrocoating paint
Particle, it is acted on by electrostatic force, is drawn onto with its opposite polarity workpiece up, as the powder sprayed increases, electric charge product
It is poly- also more, when reaching certain thickness, due to producing electrostatic repulsion, just do not continue to adsorb, so that whole workpiece obtains
Certain thickness powder coating is obtained, then makes powder melts, levelling, solidification through overheat, i.e., hard painting is formed in workpiece surface
Film.
Use electrostatic power spraying apparatus（Static plastic spraying machine）The surface of powder paint to workpiece, in electrostatic interaction
Under, powder can uniformly be adsorbed in workpiece surface, form the coating of powdery；Powdery coating solidifies by high-temperature baking levelling, becomes
It is different into effect（The variety classes effect of powdery paints）Final coating.
Surface preparation purpose：The greasy dirt, dust, rusty stain of workpiece surface are removed, and one layer of anti-corruption is generated in workpiece surface
Lose and " phosphate coating " or " chromizing layer " of spray-on coating adhesive force can be increased.Main technological steps：Oil removing, derusting, phosphatization
（Chromaking）, passivation.Not only surface is raw on the glossiness surface of silvery white without oil, rust, dirt, and originally after pre-treatment for workpiece
The grey phosphating coat that is not easy get rusty uniform and coarse into one layer（Chromaking film）, can antirust and can increase plastic-spraying layer attachment
Power.Common pre-treatment has immersion type, fountain, three kinds of waterfall type, and immersion type needs multiple soaking compartments；Spray then needs spraying
Apply and one section of spray line is set on streamline；Waterfall type is that solution directly flows down from eminence along workpiece.Spray purpose：Powder is applied
Material is equably sprayed on the surface of workpiece, special workpiece（Include the easy position for producing electrostatic screen）High-performance should be used
Static plastic spraying machine complete to spray.Processing step：Using electrostatic absorption principle, last layer is uniformly sprayed on the surface of workpiece
Powdery paints；The powder fallen is reclaimed by recovery system, can be used again after sieving.
Present invention is disclosed a kind of Powder Electrostatic Coating Technology of metalwork, face coat uniformly, not bubbling, not pit,
Coating adhesion is strong, difficult for drop-off, uniform color.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure or equivalent flow conversion that bright description is made, or directly or indirectly it is used in other related technology necks
Domain, it is included within the scope of the present invention.
Claims (4)
- A kind of 1. Powder Electrostatic Coating Technology of metalwork, it is characterised in that：Comprise the following steps：（1）Surface preparation：Workpiece surface carries out chromaking or blasting treatment；（2）Cover and cover：If some positions have not required coating on workpiece, Protection glue etc. can be used to cover up before preheating, to keep away Exempt to spray coating；（3）Preheating：Workpiece can be preheated to 180-200 DEG C；（4）Spraying：In high-pressure electrostatic off field, podwer gun is connect into negative pole, workpiece grounding is that positive pole forms loop, and powder is by compression Air is sprayed by spray gun carries negative electrical charge, is sprayed to by principle of opposite sex attraction on workpiece；（5）Solidification：Workpiece after spraying, it is sent into drying room and heats, retain certain constant temperature time, to make powder completely solid Change；（6）Cleaning：After curing of coatings, protection, equating burr are removed；（7）Examine：Check workpiece coating whether have drain spray, damage, pin bubble the defects of.
- 2. the Powder Electrostatic Coating Technology of metalwork according to claim 1, it is characterised in that：The step 5）Middle heating Temperature be 180-200 DEG C.
- 3. the Powder Electrostatic Coating Technology of metalwork according to claim 1, it is characterised in that：The step 5）Middle powder Including polyester, epoxy resin, accelerator, barium carbonate, ultra-fine barium, titanium dioxide, levelling agent, brightener, Cu-Zn alloy powder, silver powder.
- 4. the Powder Electrostatic Coating Technology of metalwork according to claim 1, it is characterised in that：The step 5）In plus one Fixed constant temperature time is 15-20min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710617376.0A CN107398413A (en) | 2017-07-26 | 2017-07-26 | The Powder Electrostatic Coating Technology of metalwork |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710617376.0A CN107398413A (en) | 2017-07-26 | 2017-07-26 | The Powder Electrostatic Coating Technology of metalwork |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107398413A true CN107398413A (en) | 2017-11-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710617376.0A Pending CN107398413A (en) | 2017-07-26 | 2017-07-26 | The Powder Electrostatic Coating Technology of metalwork |
Country Status (1)
| Country | Link |
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| CN (1) | CN107398413A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109321093A (en) * | 2018-09-28 | 2019-02-12 | 湖北鑫汉通管业有限公司 | A kind of processing technology improving plastic-coated steel corrosion resistance |
| CN111005051A (en) * | 2018-10-08 | 2020-04-14 | 株洲中车时代电气股份有限公司 | Preparation method of metal piece surface composite coating |
| CN111749667A (en) * | 2020-06-04 | 2020-10-09 | 中国石油天然气股份有限公司 | Acid-resistant time-adjustable self-dissolving metal soluble ball and manufacturing method thereof |
| CN112916349A (en) * | 2021-01-21 | 2021-06-08 | 长沙宝盛汽车配件有限公司 | Powder spraying process for automobile parts |
| CN113444995A (en) * | 2021-05-20 | 2021-09-28 | 南通莱鑫运动用品有限公司 | Metal surface treatment method for improving wear-resisting and rust-resisting properties of sports equipment |
| CN113600464A (en) * | 2021-08-25 | 2021-11-05 | 上海琥森五金机械有限公司 | Energy-saving and environment-friendly plastic spraying process |
| CN113967578A (en) * | 2021-11-17 | 2022-01-25 | 李经相 | Powder spraying and baking process for container and freight car |
| CN114192373A (en) * | 2021-12-15 | 2022-03-18 | 漳州朗源金属制品有限公司 | Surface treatment process for metal display screen base |
| CN115518849A (en) * | 2022-10-15 | 2022-12-27 | 杨家福 | Electrostatic powder coating method |
| CN115672588A (en) * | 2022-12-12 | 2023-02-03 | 甘肃宝利康耐磨材料有限公司 | Silicon carbide powder spraying production line and spraying method |
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| CN105642515A (en) * | 2014-11-19 | 2016-06-08 | 重庆江东摩托车配件有限公司 | Plastic spraying technology |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105642515A (en) * | 2014-11-19 | 2016-06-08 | 重庆江东摩托车配件有限公司 | Plastic spraying technology |
| CN105728302A (en) * | 2016-04-07 | 2016-07-06 | 太仓吉达喷涂有限公司 | Method for electrostatic spraying of powder coating on surface of aluminum profile |
Non-Patent Citations (3)
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109321093A (en) * | 2018-09-28 | 2019-02-12 | 湖北鑫汉通管业有限公司 | A kind of processing technology improving plastic-coated steel corrosion resistance |
| CN111005051A (en) * | 2018-10-08 | 2020-04-14 | 株洲中车时代电气股份有限公司 | Preparation method of metal piece surface composite coating |
| CN111749667A (en) * | 2020-06-04 | 2020-10-09 | 中国石油天然气股份有限公司 | Acid-resistant time-adjustable self-dissolving metal soluble ball and manufacturing method thereof |
| CN112916349A (en) * | 2021-01-21 | 2021-06-08 | 长沙宝盛汽车配件有限公司 | Powder spraying process for automobile parts |
| CN113444995A (en) * | 2021-05-20 | 2021-09-28 | 南通莱鑫运动用品有限公司 | Metal surface treatment method for improving wear-resisting and rust-resisting properties of sports equipment |
| CN113600464A (en) * | 2021-08-25 | 2021-11-05 | 上海琥森五金机械有限公司 | Energy-saving and environment-friendly plastic spraying process |
| CN113967578A (en) * | 2021-11-17 | 2022-01-25 | 李经相 | Powder spraying and baking process for container and freight car |
| CN114192373A (en) * | 2021-12-15 | 2022-03-18 | 漳州朗源金属制品有限公司 | Surface treatment process for metal display screen base |
| CN115518849A (en) * | 2022-10-15 | 2022-12-27 | 杨家福 | Electrostatic powder coating method |
| CN115672588A (en) * | 2022-12-12 | 2023-02-03 | 甘肃宝利康耐磨材料有限公司 | Silicon carbide powder spraying production line and spraying method |
| CN115672588B (en) * | 2022-12-12 | 2024-01-26 | 甘肃宝利康耐磨材料有限公司 | Silicon carbide powder spraying production line and spraying method |
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Application publication date: 20171128 |