CN106824700A - A kind of impingement baffle electrostatic powder coating process - Google Patents
A kind of impingement baffle electrostatic powder coating process Download PDFInfo
- Publication number
- CN106824700A CN106824700A CN201710219771.3A CN201710219771A CN106824700A CN 106824700 A CN106824700 A CN 106824700A CN 201710219771 A CN201710219771 A CN 201710219771A CN 106824700 A CN106824700 A CN 106824700A
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- Prior art keywords
- impingement baffle
- powder
- electrostatic
- paint
- workpiece
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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
- 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
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/08—Plant for applying liquids or other fluent materials to objects
- B05B5/081—Plant for applying liquids or other fluent materials to objects specially adapted for treating particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/08—Plant for applying liquids or other fluent materials to objects
- B05B5/082—Plant for applying liquids or other fluent materials to objects characterised by means for supporting, holding or conveying the objects
-
- 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
Abstract
The present invention relates to metalwork surface paint spraying technique field, and in particular to a kind of impingement baffle electrostatic powder coating process, by (1) pre-treatment：Workpiece surface is degreased；(2) Workpiece painting conveying：Conveyed by Rubber Conveyor Belt Scrap；(3) prepared by dusty spray material：Mixed by paint and PDMS and its curing agent；(4) dusty spray construction technology；(5) electrostatic powder coating process of dusty spray solidification, for traditional paint spraying technique, its spray efficiency is higher, paint usage amount is less, so as to reduce the cost of purchase paint raw materials, a large amount of wastes that traditional handicraft causes paint are avoided, so as to play the beneficial effect of energy-conservation.
Description
Technical field
The present invention relates to metalwork surface paint spraying technique field, and in particular to a kind of impingement baffle electrostatic powder coating work
Skill.
Background technology
The operation principle of electrostatic powder spraying is nearly identical with the electrostatic spray of general liquid coating, different
Part is that powder spray is scattered, rather than atomization.It is the coating gushed out by electrostatic powder paint gun, scattered
Make powder particle negatively charged simultaneously, electrically charged powder particle is by air-flow other active forces such as (or) centrifugal force and electrostatic attraction
Effect, apply to ground connection coated article on, reheat melting and solidification film forming.Electrostatic powder spraying is in industrial coating field
In account for the powder coating process of leading position.
Electrostatic powder coating is with the coating machine with atomization nozzle (being atomized coating) and arrester stage (electricity electric current occurs)
Make paint particles, to applying electric charge, form electric field between electrode and coated article body, applied using its electrostatic adsorption
Dress
Main feature：Spraying method can using manually, automatic or manual+automatic.Material spray 100% is solid powder, is dissociated
Powder can recycle, coating recovery utilization rate is up to 98%.Suspention transportation system, high degree of automation.Coating micropore
Few, antiseptic property is good, and can once carry out thick film spraying.Electrostatic powder coating process comes across the sixties in 20th century, mainly
It is applied to coating metal surfaces.Into late 1990s, with the development of powdery paints and spraying equipment, make electrostatic powder
Spraying coating process is applied to nonmetallic surface and is possibly realized.
The patent of Publication No. CN105689218A discloses a kind of electrostatic spraying technology for powder paints technique, enters by workpiece
Row pre-treatment, is then transported to powder spraying chamber by carrier chain by workpiece, and electrostatic powder spraying is carried out by spray gun.But, the patent
Scheme has that workpiece pre-treatment is not thorough enough, the problem of dusty spray cured later effect on driving birds is not good.Meanwhile, existing steel erosion control
Plate is because of anticorrosion demand, it is necessary to carry out paint spraying to its surface.But, traditional paint spraying mode is less efficient, paint
Consumption is larger, easily causes a large amount of wastes of paint.
Therefore, based on a kind of above-mentioned, impingement baffle electrostatic powder coating process of present invention offer, by electrostatic powder coating skill
The use of art technique, makes powdered paint adsorb on steel impingement baffle using electrostatic, so as to improve paint utilization ratio, reaches
To reduces cost and the effect of energy-conservation, while making workpiece pretreatment cleaning more thorough, powder curing effect is more preferable, so as to solve existing
With the presence of technology electrospray process workpiece pretreatment cleaning not enough thoroughly, dusty spray solidification effect is good, Traditional paint spray skill
Art spray efficiency is relatively low, paint consumption is big deficiency and defect.
The content of the invention
The purpose of the present invention is that：Not thorough enough, the dusty spray cured later for the workpiece pre-treatment that presently, there are
Effect on driving birds is not good, traditional paint spraying mode is less efficient, and paint consumption is larger, and a large amount of wastes for easily causing paint are asked
A kind of topic, there is provided impingement baffle electrostatic powder coating process, by the use of electrostatic powder coating technical matters, powder is made using electrostatic
The paint of last shape is adsorbed on steel impingement baffle, so as to improve paint utilization ratio, reaches the effect of reduces cost and energy-conservation, together
When make workpiece pretreatment cleaning more thorough, powder curing effect more preferably so that solve prior art presence electrospray technique work
Part pretreatment cleaning is not enough thoroughly, dusty spray solidification effect is not good, Traditional paint spray technology spray efficiency is relatively low, paint consumption
Big deficiency and defect.
To achieve these goals, the technical solution adopted by the present invention is：
A kind of impingement baffle electrostatic powder coating process, comprises the following steps：
(1) pre-treatment：Easily there is the influence dusty spray such as corrosion or greasy dirt, dust due to surface in steel impingement baffle workpiece
The polluter of adhesion, steel impingement baffle needed to carry out surface cleaning treatment before electrostatic powder coating；Impingement baffle is first
The corrosion on its surface is removed by acid pickling and rust removing mode, rust cleaning mode is to be placed on impingement baffle to be totally submerged placement in descaling bath
Quickly removed after 5min, it is that 95% ethanol solution cleaning and fan are dried up to use mass fraction, and it is acid molten that pickling is used
Liquid is according to volume proportion：The hydrochloric acid of mass fraction 36%：The acetic acid of mass fraction 18%：The sulfuric acid of mass fraction 98%：Matter
The nitric acid for measuring fraction 16% is 2:5:1:2；Then the surface degreasing of impingement baffle is carried out by alkali liquor oil removing mode, oil removing mode is
Impingement baffle is completely submerged in alkaline bath to be placed and quickly remove after 2min, and use mass fraction for 95% ethanol solution
Clean and fan drying, except oil solution uses acetone and sodium hydroxide solution that mass fraction be 36% of the mass fraction for 26%
It is 2 according to volume ratio:8 ratio carries out magnetic agitation 20min under 25 DEG C of environment temperature, obtains acetone with NaOH
Mixed solution；After alkali cleaning oil removing is completed, then impingement baffle is placed in ultrasonic cleaning machine it is cleaned by ultrasonic 5min, by ultrasonic clear
The mode of washing removes the dust of impingement baffle remained on surface, and the cleaning solution in ultrasonic cleaning machine is deionized water；Then take out erosion control
Plate, after being cleaned completely using absolute ethyl alcohol, impingement baffle is placed in the baking oven that temperature is 35 DEG C -40 DEG C and is dried, and is then cooled down
It is standby to less than 25 DEG C；
(2) Workpiece painting conveying：Impingement baffle workpiece polylith splice arrangement by way of, polylith impingement baffle join end to end into
Row splicing is placed on Rubber Conveyor Belt Scrap upper surface, and is transported in powder spraying chamber by Rubber Conveyor Belt Scrap；Gun slot in powder spraying chamber
The upper surface of Rubber Conveyor Belt Scrap is faced, gun slot position sets an electrode needle, and the impingement baffle lower surface on Rubber Conveyor Belt Scrap sets
The metal hanger of some ground connection is put, makes to form electric field between workpiece surface and the electrode needle of gun slot；The other end of electrode needle connects
High-pressure electrostatic acoustical generator is connect, to facilitate generation high-pressure electrostatic；High-pressure electrostatic acoustical generator was first powered on 10s- before dusty spray
15s, then starts spray gun and Rubber Conveyor Belt Scrap by while spray gun is sprayed powder, powder is carried under electric field action simultaneously
Electrostatic, and the powder even application with electrostatic is sticked into impingement baffle workpiece surface；
(3) prepared by dusty spray material：The dusty material of spraying is paint powder, and the preparation method for painting powder is：It is first
First, paint in the market bought opens paint lid, is according to volume ratio with the curing agent of PDMS and PDMS by paint liquid
20:10:1 ratio stirring mixing, is placed in 6h in 65 DEG C of baking oven, and taking-up is placed in and room temperature is cooled to outside baking oven；Then will be solid
Mixture is ground into particle by the mixture for changing drying by pulverizer, then by grinder by pulverized particles grind into powder
Shape, is dried to powder, and is contained in powder barrel；
(4) dusty spray construction technology：Electrostatic high-pressure is 100KV, and spray coating powder can be improved using larger electrostatic potential
The upper powder efficiency at end；Electrostatic induced current is 30 μ A-35 μ A；Vertical range between gun slot and impingement baffle workpiece surface is
20cm-25cm；The transfer rate of Rubber Conveyor Belt Scrap is 6.5m/min；During impingement baffle electrostatic powder coating, in order that spray
Apply powder more uniform, while ensureing powder paint coatings thickness, the upper surface requirement to Rubber Conveyor Belt Scrap is smooth, it is to avoid table
Surface evenness is impacted to coating thickness uniformity；
(5) dusty spray solidification：Following curing process is used in curing room：First, solidification temperature is controlled for 160 DEG C,
Relative humidity is 99%, solidification temperature is risen into 190 DEG C with 5 DEG C/min programming rates, and keep 15min；Then, control solidification
Temperature is risen to 240 DEG C from 190 DEG C by temperature with the programming rate of 5 DEG C/min, and control relative humidity drops to 1% from 99%,
And keep 10min；Then solidification temperature is dropped to 25 DEG C with the cooling rate of 10 DEG C/min, and takes out impingement baffle workpiece.
By adopting the above-described technical solution, the beneficial effects of the invention are as follows：
1st, technical scheme, by using electrostatic powder coating process, relative to traditional paint spraying technique
For, its spray efficiency is higher, and paint usage amount is less, so as to reduce the cost of purchase paint raw materials, it is to avoid traditional handicraft
A large amount of wastes of paint, reduce the environmental pollution that the paint of excessive waste is caused, so as to play the beneficial effect of environmental protection and energy saving.
2nd, further, technical scheme, due to using acid pickling and rust removing, alkali cleaning oil removing and ultrasonic cleaning
Workpiece pretreatment mode, makes corrosion, greasy dirt and the dust of steel impingement baffle workpiece obtain effective and thorough removing and processes, before making
More preferably, workpiece early stage cleaning is more thorough for treatment effect.
3rd, yet further, by the way of impingement baffle workpiece of the invention is arranged on Rubber Conveyor Belt Scrap using polylith splicing,
The utilization ratio of dusty spray can fully be improved, it is to avoid excessive workpiece interstitial spaces occur, while also taking full advantage of rubber
The upper surface locus of glue conveyer belt, makes spray efficiency higher；Meanwhile, workpiece is transmitted using Rubber Conveyor Belt Scrap, phase
For metal chain type load mode, dusty spray can be avoided to be sprayed on metallic bond by electrostatic interaction, so as to reduce
The waste of dusty spray, improves powder utilization ratio.
4th, last, dusty spray curing process proposed by the present invention can carry out having for later stage to the powder of electrostatic spraying
Effect curing process, solves the problems, such as that the dusty spray solidification effect that prior art is present is not good.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention,
Technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is the present invention one
Divide embodiment, rather than whole embodiments, based on the embodiment in the present invention, those of ordinary skill in the art are not making
The every other embodiment obtained under the premise of creative work, belongs to the scope of protection of the invention.
Embodiment one：
A kind of impingement baffle electrostatic powder coating process, comprises the following steps：
(1) pre-treatment：Easily there is the influence dusty spray such as corrosion or greasy dirt, dust due to surface in steel impingement baffle workpiece
The polluter of adhesion, steel impingement baffle needed to carry out surface cleaning treatment before electrostatic powder coating；Impingement baffle is first
The corrosion on its surface is removed by acid pickling and rust removing mode, rust cleaning mode is to be placed on impingement baffle to be totally submerged placement in descaling bath
Quickly removed after 5min, it is that 95% ethanol solution cleaning and fan are dried up to use mass fraction, and it is acid molten that pickling is used
Liquid is according to volume proportion：The hydrochloric acid of mass fraction 36%：The acetic acid of mass fraction 18%：The sulfuric acid of mass fraction 98%：Matter
The nitric acid for measuring fraction 16% is 2:5:1:2；Then the surface degreasing of impingement baffle is carried out by alkali liquor oil removing mode, oil removing mode is
Impingement baffle is completely submerged in alkaline bath to be placed and quickly remove after 2min, and use mass fraction for 95% ethanol solution
Clean and fan drying, except oil solution uses acetone and sodium hydroxide solution that mass fraction be 36% of the mass fraction for 26%
It is 2 according to volume ratio:8 ratio carries out magnetic agitation 20min under 25 DEG C of environment temperature, obtains acetone with NaOH
Mixed solution；After alkali cleaning oil removing is completed, then impingement baffle is placed in ultrasonic cleaning machine it is cleaned by ultrasonic 5min, by ultrasonic clear
The mode of washing removes the dust of impingement baffle remained on surface, and the cleaning solution in ultrasonic cleaning machine is deionized water；Then take out erosion control
Plate, after being cleaned completely using absolute ethyl alcohol, impingement baffle is placed in the baking oven that temperature is 35 DEG C DEG C and is dried, and is then cooled to 25
It is standby below DEG C；
(2) Workpiece painting conveying：Impingement baffle workpiece polylith splice arrangement by way of, polylith impingement baffle join end to end into
Row splicing is placed on Rubber Conveyor Belt Scrap upper surface, and is transported in powder spraying chamber by Rubber Conveyor Belt Scrap；Gun slot in powder spraying chamber
The upper surface of Rubber Conveyor Belt Scrap is faced, gun slot position sets an electrode needle, and the impingement baffle lower surface on Rubber Conveyor Belt Scrap sets
The metal hanger of some ground connection is put, makes to form electric field between workpiece surface and the electrode needle of gun slot；The other end of electrode needle connects
High-pressure electrostatic acoustical generator is connect, to facilitate generation high-pressure electrostatic；High-pressure electrostatic acoustical generator was first powered on 10s before dusty spray,
Then start simultaneously spray gun and Rubber Conveyor Belt Scrap will, while spray gun is sprayed powder, powder carries electrostatic under electric field action,
And the powder even application with electrostatic is sticked into impingement baffle workpiece surface；
(3) prepared by dusty spray material：The dusty material of spraying is paint powder, and the preparation method for painting powder is：It is first
First, paint in the market bought opens paint lid, is according to volume ratio with the curing agent of PDMS and PDMS by paint liquid
20:10:1 ratio stirring mixing, is placed in 6h in 65 DEG C of baking oven, and taking-up is placed in and room temperature is cooled to outside baking oven；Then will be solid
Mixture is ground into particle by the mixture for changing drying by pulverizer, then by grinder by pulverized particles grind into powder
Shape, is dried to powder, and is contained in powder barrel；
(4) dusty spray construction technology：Electrostatic high-pressure is 100KV, and spray coating powder can be improved using larger electrostatic potential
The upper powder efficiency at end；Electrostatic induced current is 30 μ A；Vertical range between gun slot and impingement baffle workpiece surface is 20cmcm；Rubber
The transfer rate of glue conveyer belt is 6.5m/min；During impingement baffle electrostatic powder coating, in order that dusty spray is more equal
Even, while ensureing powder paint coatings thickness, the upper surface requirement to Rubber Conveyor Belt Scrap is smooth, it is to avoid surface smoothness is to spray
Thickness evenness is applied to impact；
(5) dusty spray solidification：Following curing process is used in curing room：First, solidification temperature is controlled for 160 DEG C,
Relative humidity is 99%, solidification temperature is risen into 190 DEG C with 5 DEG C/min programming rates, and keep 15min；Then, control solidification
Temperature is risen to 240 DEG C from 190 DEG C by temperature with the programming rate of 5 DEG C/min, and control relative humidity drops to 1% from 99%,
And keep 10min；Then solidification temperature is dropped to 25 DEG C with the cooling rate of 10 DEG C/min, and takes out impingement baffle workpiece.
By using above-mentioned process program, workpiece pre-treatment is more cleaned totally, and surface corrosion, greasy dirt and dust are obtained
Good cleaning treatment；Meanwhile, identical number of packages, the impingement baffle workpiece of same model are sprayed, the usage amount of paint is relative to tradition
Manual spray paint mode reduce 30%-40%, so as to avoid the waste of paint raw materials, improve paint using effect
Rate.Meanwhile, using powder curing technique after, relative to be provided without subsequent curing process treatment workpiece surface for, use
The powder of the workpiece surface spraying after curing process, more preferably, after tested, the spray paint after solidification is adhered to its adhesion property
Power improves 50%-60% relative to before uncured, and powder curing effect is more preferable.
Embodiment two：
A kind of impingement baffle electrostatic powder coating process, comprises the following steps：
(1) pre-treatment：Easily there is the influence dusty spray such as corrosion or greasy dirt, dust due to surface in steel impingement baffle workpiece
The polluter of adhesion, steel impingement baffle needed to carry out surface cleaning treatment before electrostatic powder coating；Impingement baffle is first
The corrosion on its surface is removed by acid pickling and rust removing mode, rust cleaning mode is to be placed on impingement baffle to be totally submerged placement in descaling bath
Quickly removed after 5min, it is that 95% ethanol solution cleaning and fan are dried up to use mass fraction, and it is acid molten that pickling is used
Liquid is according to volume proportion：The hydrochloric acid of mass fraction 36%：The acetic acid of mass fraction 18%：The sulfuric acid of mass fraction 98%：Matter
The nitric acid for measuring fraction 16% is 2:5:1:2；Then the surface degreasing of impingement baffle is carried out by alkali liquor oil removing mode, oil removing mode is
Impingement baffle is completely submerged in alkaline bath to be placed and quickly remove after 2min, and use mass fraction for 95% ethanol solution
Clean and fan drying, except oil solution uses acetone and sodium hydroxide solution that mass fraction be 36% of the mass fraction for 26%
It is 2 according to volume ratio:8 ratio carries out magnetic agitation 20min under 25 DEG C of environment temperature, obtains acetone with NaOH
Mixed solution；After alkali cleaning oil removing is completed, then impingement baffle is placed in ultrasonic cleaning machine it is cleaned by ultrasonic 5min, by ultrasonic clear
The mode of washing removes the dust of impingement baffle remained on surface, and the cleaning solution in ultrasonic cleaning machine is deionized water；Then take out erosion control
Plate, after being cleaned completely using absolute ethyl alcohol, impingement baffle is placed in the baking oven that temperature is 40 DEG C and is dried, and is then cooled to 25 DEG C
It is standby below；
(2) Workpiece painting conveying：Impingement baffle workpiece polylith splice arrangement by way of, polylith impingement baffle join end to end into
Row splicing is placed on Rubber Conveyor Belt Scrap upper surface, and is transported in powder spraying chamber by Rubber Conveyor Belt Scrap；Gun slot in powder spraying chamber
The upper surface of Rubber Conveyor Belt Scrap is faced, gun slot position sets an electrode needle, and the impingement baffle lower surface on Rubber Conveyor Belt Scrap sets
The metal hanger of some ground connection is put, makes to form electric field between workpiece surface and the electrode needle of gun slot；The other end of electrode needle connects
High-pressure electrostatic acoustical generator is connect, to facilitate generation high-pressure electrostatic；High-pressure electrostatic acoustical generator was first powered on 10s- before dusty spray
15s, then starts spray gun and Rubber Conveyor Belt Scrap by while spray gun is sprayed powder, powder is carried under electric field action simultaneously
Electrostatic, and the powder even application with electrostatic is sticked into impingement baffle workpiece surface；
(3) prepared by dusty spray material：The dusty material of spraying is paint powder, and the preparation method for painting powder is：It is first
First, paint in the market bought opens paint lid, is according to volume ratio with the curing agent of PDMS and PDMS by paint liquid
20:10:1 ratio stirring mixing, is placed in 6h in 65 DEG C of baking oven, and taking-up is placed in and room temperature is cooled to outside baking oven；Then will be solid
Mixture is ground into particle by the mixture for changing drying by pulverizer, then by grinder by pulverized particles grind into powder
Shape, is dried to powder, and is contained in powder barrel；
(4) dusty spray construction technology：Electrostatic high-pressure is 100KV, and spray coating powder can be improved using larger electrostatic potential
The upper powder efficiency at end；Electrostatic induced current is 35 μ A；Vertical range between gun slot and impingement baffle workpiece surface is 25cm；Rubber
The transfer rate of conveyer belt is 6.5m/min；During impingement baffle electrostatic powder coating, in order that dusty spray is more uniform,
Ensure powder paint coatings thickness simultaneously, the upper surface requirement to Rubber Conveyor Belt Scrap is smooth, it is to avoid surface smoothness is to spraying
Thickness evenness is impacted；
(5) dusty spray solidification：Following curing process is used in curing room：First, solidification temperature is controlled for 160 DEG C,
Relative humidity is 99%, solidification temperature is risen into 190 DEG C with 5 DEG C/min programming rates, and keep 15min；Then, control solidification
Temperature is risen to 240 DEG C from 190 DEG C by temperature with the programming rate of 5 DEG C/min, and control relative humidity drops to 1% from 99%,
And keep 10min；Then solidification temperature is dropped to 25 DEG C with the cooling rate of 10 DEG C/min, and takes out impingement baffle workpiece.
By adopting the above-described technical solution, the present invention is by using electrostatic powder coating process, relative to traditional oil
For paint spraying coating process, its spray efficiency is higher, and paint usage amount is less, so as to reduce the cost of purchase paint raw materials, it is to avoid
A large amount of wastes of traditional handicraft paint, also reduce the environmental pollution that the paint of excessive waste is caused, so as to playing environmentally friendly section
The beneficial effect of energy.Further, technical scheme, due to using acid pickling and rust removing, alkali cleaning oil removing and ultrasonic cleaning
Workpiece pretreatment mode, corrosion, greasy dirt and the dust of steel impingement baffle workpiece is obtained effective and thorough removing and process, make
More preferably, workpiece early stage cleaning is more thorough for pre-treatment effect.Yet further, impingement baffle workpiece of the invention is in Rubber Conveyor Belt Scrap
It is upper by the way of polylith splicing arrangement, can fully improve the utilization ratio of dusty spray, it is to avoid excessive workpiece interval is empty
Gap occurs, while also taking full advantage of the upper surface locus of Rubber Conveyor Belt Scrap, makes spray efficiency higher；Meanwhile, using rubber
Glue conveyer belt is transmitted to workpiece, for metal chain type load mode, dusty spray can be avoided to make by electrostatic
With being sprayed on metallic bond, so as to reduce the waste of dusty spray, powder utilization ratio is improved.Finally, it is proposed by the present invention
Dusty spray curing process, can carry out effective curing process in later stage to the powder of electrostatic spraying, solve prior art and exist
The not good problem of dusty spray solidification effect.
The above, specific embodiment only of the invention, but protection scope of the present invention is not limited thereto, and it is any
Those familiar with the art can readily occur in change or replacement in the technical scope of present disclosure, should all contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.
Claims (1)
1. a kind of impingement baffle electrostatic powder coating process, it is characterised in that：Comprise the following steps：
(1) pre-treatment：Easily there is the influence dusty spray adhesion such as corrosion or greasy dirt, dust due to surface in steel impingement baffle workpiece
The polluter of power, steel impingement baffle needed to carry out surface cleaning treatment before electrostatic powder coating；Impingement baffle passes through first
Acid pickling and rust removing mode removes the corrosion on its surface, and rust cleaning mode is that impingement baffle is placed in descaling bath to be totally submerged placement 5min
Quickly remove afterwards, it is that 95% ethanol solution cleaning and fan are dried up to use mass fraction, and the acid solution that pickling is used is pressed
It is according to volume proportion：The hydrochloric acid of mass fraction 36%：The acetic acid of mass fraction 18%：The sulfuric acid of mass fraction 98%：Quality point
The nitric acid of number 16% is 2:5:1:2；Then the surface degreasing of impingement baffle is carried out by alkali liquor oil removing mode, oil removing mode is will be anti-
Punching is completely submerged in alkaline bath to place and quickly remove after 2min, and uses mass fraction to be cleaned for 95% ethanol solution
And fan is dried up, except oil solution use mass fraction for sodium hydroxide solution that 26% acetone and mass fraction are 36% according to
Volume ratio is 2:8 ratio carries out magnetic agitation 20min under 25 DEG C of environment temperature, obtains the mixing of acetone and NaOH
Solution；After alkali cleaning oil removing is completed, then impingement baffle is placed in ultrasonic cleaning machine it is cleaned by ultrasonic 5min, by ultrasonic cleaning side
Formula removes the dust of impingement baffle remained on surface, and the cleaning solution in ultrasonic cleaning machine is deionized water；Impingement baffle is then taken out, is adopted
After being cleaned completely with absolute ethyl alcohol, impingement baffle is placed in the baking oven that temperature is 35 DEG C -40 DEG C and is dried, be then cooled to 25 DEG C
It is standby below；
(2) Workpiece painting conveying：By way of polylith splices arrangement, polylith impingement baffle joins end to end and is spelled impingement baffle workpiece
Connect and be placed on Rubber Conveyor Belt Scrap upper surface, and be transported in powder spraying chamber by Rubber Conveyor Belt Scrap；Gun slot in powder spraying chamber is just right
The upper surface of Rubber Conveyor Belt Scrap, gun slot position sets an electrode needle, if the impingement baffle lower surface on Rubber Conveyor Belt Scrap is set
The metal hanger on stem grafting ground, makes to form electric field between workpiece surface and the electrode needle of gun slot；The other end connection of electrode needle is high
Pressure electrostatic acoustical generator, to facilitate generation high-pressure electrostatic；High-pressure electrostatic acoustical generator was first powered on 10s-15s before dusty spray,
Then start simultaneously spray gun and Rubber Conveyor Belt Scrap will, while spray gun is sprayed powder, powder carries electrostatic under electric field action,
And the powder even application with electrostatic is sticked into impingement baffle workpiece surface；
(3) prepared by dusty spray material：The dusty material of spraying is paint powder, and the preparation method for painting powder is：First, will
The paint of in the market purchase opens paint lid, and will paint liquid with the curing agent of PDMS and PDMS is 20 according to volume ratio:10:
1 ratio stirring mixing, is placed in 6h in 65 DEG C of baking oven, and taking-up is placed in and room temperature is cooled to outside baking oven；Then solidification is dried
Mixture mixture is ground into by particle by pulverizer, then pulverized particles are ground into powder by grinder, to powder
End is dried, and is contained in powder barrel；
(4) dusty spray construction technology：Electrostatic high-pressure is 100KV, and dusty spray can be improved using larger electrostatic potential
Upper powder efficiency；Electrostatic induced current is 30 μ A-35 μ A；Vertical range between gun slot and impingement baffle workpiece surface is 20cm-
25cm；The transfer rate of Rubber Conveyor Belt Scrap is 6.5m/min；During impingement baffle electrostatic powder coating, in order that dusty spray
More uniform, while ensureing powder paint coatings thickness, the upper surface requirement to Rubber Conveyor Belt Scrap is smooth, it is to avoid surfacing
Degree is impacted to coating thickness uniformity；
(5) dusty spray solidification：Following curing process is used in curing room：First, solidification temperature is controlled for 160 DEG C, relatively
Humidity is 99%, solidification temperature is risen into 190 DEG C with 5 DEG C/min programming rates, and keep 15min；Then, solidification temperature is controlled
Temperature is risen to 240 DEG C from 190 DEG C with the programming rate of 5 DEG C/min, control relative humidity drops to 1% from 99%, and protects
Hold 10min；Then solidification temperature is dropped to 25 DEG C with the cooling rate of 10 DEG C/min, and takes out impingement baffle workpiece.
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| CN109877026A (en) * | 2017-12-06 | 2019-06-14 | 天长市金陵电子有限责任公司 | A kind of leakproof electrostatic powder coating spraying process |
| CN111408531A (en) * | 2020-03-24 | 2020-07-14 | 同曦集团有限公司 | Antibacterial and antiviral aluminum alloy electrostatic powder spraying process |
| CN111841986A (en) * | 2020-07-31 | 2020-10-30 | 上海交通大学 | Multi-station ultrasonic spraying device and method |
| CN115261824A (en) * | 2022-09-26 | 2022-11-01 | 江苏仕邦柔性电子研究院有限公司 | Anti-centrifugal deposition equipment based on cyclone abrasion reduction type powder coating atomic layer |
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