CN112439669A - Process for spraying water-based paint on surface of plastic part - Google Patents
Process for spraying water-based paint on surface of plastic part Download PDFInfo
- Publication number
- CN112439669A CN112439669A CN202011215995.5A CN202011215995A CN112439669A CN 112439669 A CN112439669 A CN 112439669A CN 202011215995 A CN202011215995 A CN 202011215995A CN 112439669 A CN112439669 A CN 112439669A
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- plastic part
- spraying
- mercury lamp
- water
- shell
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- 239000004033 plastic Substances 0.000 title claims abstract description 100
- 229920003023 plastic Polymers 0.000 title claims abstract description 100
- 238000005507 spraying Methods 0.000 title claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 239000003973 paint Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000008569 process Effects 0.000 title claims abstract description 26
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims abstract description 55
- 229910052753 mercury Inorganic materials 0.000 claims abstract description 52
- 239000000463 material Substances 0.000 claims abstract description 28
- 239000000428 dust Substances 0.000 claims abstract description 10
- 230000001678 irradiating effect Effects 0.000 claims abstract description 10
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000007921 spray Substances 0.000 claims abstract description 9
- 239000000853 adhesive Substances 0.000 claims abstract description 8
- 230000001070 adhesive effect Effects 0.000 claims abstract description 8
- 239000000126 substance Substances 0.000 claims abstract description 7
- 230000008859 change Effects 0.000 claims abstract description 6
- 150000002500 ions Chemical class 0.000 claims abstract description 5
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 239000011248 coating agent Substances 0.000 claims description 15
- 238000000576 coating method Methods 0.000 claims description 15
- 230000004913 activation Effects 0.000 claims description 14
- 230000007246 mechanism Effects 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 239000007822 coupling agent Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 4
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 3
- -1 beta-aminoethyl Chemical group 0.000 claims description 3
- 230000002708 enhancing effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 8
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 230000002209 hydrophobic effect Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000007605 air drying Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005661 hydrophobic surface Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Images
Classifications
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- 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
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
-
- 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
- B05D3/06—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 exposure to radiation
- B05D3/061—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 exposure to radiation using U.V.
- B05D3/062—Pretreatment
- B05D3/063—Pretreatment of polymeric substrates
-
- 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
- B05D3/14—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 electrical means
- B05D3/141—Plasma treatment
- B05D3/142—Pretreatment
- B05D3/144—Pretreatment of polymeric substrates
-
- 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
- B05D7/02—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 macromolecular substances, e.g. rubber
Abstract
The invention discloses a process for spraying water-based paint on the surface of a plastic part, which comprises the following steps: preparing materials, cleaning, and wiping dirt on the outer surface of a plastic piece to be sprayed; irradiating the outer surface of the plastic part to be sprayed by using a mercury lamp capable of generating ultraviolet rays in a UVC waveband, and opening chemical bonds on the outer surface of the plastic part by matching with ozone generated by irradiating air by using the mercury lamp so as to change the surface material performance of the plastic part from hydrophobicity to hydrophilicity; thirdly, performing electrostatic dust removal treatment on the surface of the irradiated plastic part by using an ion dust removal gun; and step four, spraying the water-based paint on the outer surface of the plastic part by using a spray gun. Preferably, the UVC band ultraviolet light has two peaks, the two peaks are 185nm and 254nm respectively. The invention can effectively improve the adhesive force of the water-based paint on the surface of the plastic part, improves the spraying yield and has better environmental protection effect.
Description
Technical Field
The invention relates to the technical field of spraying processes, in particular to a process for spraying water-based paint on the surface of a plastic part.
Background
The water-based paint is a paint using water as a solvent or as a dispersion medium. Because organic solvent is not needed, the coating has little influence on the environment and the operation environment during use, and is a more environment-friendly coating. Therefore, the water-based paint is a material worth popularizing in the spraying industry. However, the surfaces of the existing parts such as plastic parts, metal parts and glass materials are hydrophobic, and the surfaces of the parts are difficult to combine with the water-based paint. The application range of the water-based paint is limited.
In order to spray a hydrophobic surface component, such as a plastic part, with an aqueous coating, it is necessary to modify the hydrophobic properties of the outer surface of the plastic part. It is common practice to modify the hydrophobicity of the outer surface of the plastic part by ionization or to spray a layer of chemical agent on the outer surface of the plastic part to modify the material properties. The ionization technology is easy to cause the deformation of the plastic part, the operation efficiency is lower, and the yield of the subsequent spraying process is reduced; the chemical reagent can cause new pollution, cannot reflect the environmental protection performance of the water-based paint, and greatly increases the cost of the spraying process.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a process for spraying the water-based paint on the surface of the plastic piece, which can effectively improve the adhesive force of the water-based paint on the surface of the plastic piece, improve the spraying yield and has better environmental protection effect.
In order to achieve the purpose, the technical scheme of the invention is as follows: a process for spraying water-based paint on the surface of a plastic part comprises the following steps:
preparing materials, cleaning, and wiping dirt on the outer surface of a plastic piece to be sprayed;
irradiating the outer surface of the plastic part to be sprayed by using a mercury lamp capable of generating ultraviolet rays in a UVC waveband, and opening chemical bonds on the outer surface of the plastic part by matching with ozone generated by irradiating air by using the mercury lamp so as to change the surface material performance of the plastic part from hydrophobicity to hydrophilicity;
thirdly, performing electrostatic dust removal treatment on the surface of the irradiated plastic part by using an ion dust removal gun;
and step four, spraying the water-based paint on the outer surface of the plastic part by using a spray gun.
Preferably, the UVC band ultraviolet has two wave peaks, and the two wave peaks are 185nm and 254nm respectively; 185nm ultraviolet rays can change oxygen in the air into ozone, and the ozone has strong oxidation effect; the irradiation intensity of 254nm is stronger, and the chemical bond on the outer surface of the plastic part can be effectively opened.
The mercury lamp is a low-pressure mercury lamp, namely the partial pressure of mercury vapor is less than 102Pa when discharge is stable.
Preferably, the irradiation intensity of the mercury lamp irradiation on the surface of the plastic part is 190-210mj/cm2, and the water drop angle of the material after the mercury lamp irradiation on the surface of the plastic part is less than or equal to 10 degrees.
And in the fourth step, before spraying the water-based paint, a layer of water-based treating agent capable of enhancing the adhesive force of the water-based paint is sprayed on the outer surface of the plastic part by using a spray gun, and then the water-based paint is sprayed in the fourth step after natural air drying.
Preferably, the aqueous treating agent is a coupling agent, and the coupling agent is Y-divinyltriaminopropylmethyldimethoxysilane/gamma-aminopropyltriethoxysilane or N- (beta-aminoethyl) -Y-aminopropylmethyldimethoxysilane.
The plastic part is further improved in the first step, the plastic part is firstly installed on a jig after being cleaned of dirt, the jig moves along a moving line at a set speed, the plastic part passes through UV activation equipment provided with the mercury lamp in the continuous moving process, and the outer surface of the plastic part is irradiated by the mercury lamp on the UV activation equipment. This can effectively improve the efficiency of UV (ultraviolet) activation.
Preferably, the UV activation apparatus includes a housing formed in a tunnel shape, the upper side, the left side and the right side of the housing are each provided with the mercury lamp capable of generating ultraviolet rays in the UVC band, and the plastic member is moved along the housing to be irradiated with the mercury lamp.
The improved structure is characterized in that an upper bracket is arranged on the upper side in the shell, a left bracket is arranged on the left side in the shell, and a right bracket is arranged on the right side in the shell; the mercury lamp on the upper side in the shell is arranged on the upper lamp holder, and the upper lamp holder is arranged on the upper bracket; the mercury lamp on the left side in the shell is arranged on a left lamp holder, and the left lamp holder is arranged on a left bracket; the mercury lamp on the right side in the shell is arranged on a right lamp holder, and the right lamp holder is arranged on a right bracket;
the upper bracket can be adjusted in position left and right relative to the shell, and the upper lamp holder can be adjusted in position up and down relative to the upper bracket; the left bracket can be adjusted left and right relative to the shell, and the left lamp holder can be adjusted up and down relative to the left bracket; the right support can be adjusted in position left and right relative to the shell, and the right lamp holder can be adjusted in position up and down relative to the left support. Thus, the mercury lamp can be adjusted in position, and the irradiation intensity on the surface of the plastic part can be conveniently adjusted.
And furthermore, a driving mechanism is arranged beside the moving line and drives the jig to rotate, the jig drives the plastic piece to rotate, and the plastic piece rotates and moves along the shell. The irradiation intensity on the surface of the plastic part is more uniform through the rotation of the plastic part.
Preferably, the moving line comprises two chains which move circularly, a supporting seat is arranged between the two chains, and the jig is rotatably arranged on the supporting seat;
the driving mechanism comprises a driving motor and a driving belt, the driving motor drives the driving belt to circularly move through a belt pulley, and the driving belt is in contact with the jig to drive the jig to rotate.
According to the invention, before the plastic piece to be sprayed is sprayed by using the water-based paint, the outer surface of the plastic piece to be sprayed is irradiated by the mercury lamp capable of generating ultraviolet rays in a UVC waveband, and the chemical bond on the outer surface of the plastic piece is opened by matching with ozone generated by irradiating air by the mercury lamp so that the surface material performance of the plastic piece is changed from hydrophobicity to hydrophilicity; and then, by electrostatic dust removal, the spraying is completed by adopting the water-based paint in an effective time, and the sprayed material recovers the original performance, so that the adhesive force of the water-based paint on the surface of the plastic part can be effectively improved, and the spraying yield of the water-based paint is effectively improved. The plastic piece which is originally hydrophobic is also suitable for being sprayed by water-based paint, and a better environment-friendly effect is achieved.
The process provided by the invention can be applied to plastic parts and can also be applied to spraying of the water-based paint on the outer surfaces of partial metal parts, glass parts and the like.
Drawings
FIG. 1 is a process flow diagram of an embodiment of the invention;
FIG. 2 is a top perspective view of the UV activation apparatus of the present invention;
FIG. 3 is an enlarged view taken from the direction A of FIG. 2;
FIG. 4 is a bottom perspective view of the UV activation apparatus of the present invention;
FIG. 5 is an enlarged view at B of FIG. 4;
FIG. 6 is a schematic view of the interaction of the UV activation apparatus of the present invention with a moving line;
FIG. 7 is a perspective view of the driving mechanism and the jig of the present invention;
FIG. 8 is a cross-hatch test of the surface of a plastic part that has not been UV activated and then has been surface coated with an aqueous coating;
figure 9 is a cross-hatch test of the surface of a plastic part that has been UV activated and then surface coated with a water-based coating.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 7, a process for spraying an aqueous coating on a surface of a plastic part comprises the following steps:
step S1, preparing materials, cleaning, and wiping off dirt on the outer surface of the plastic piece to be sprayed.
Step two S2, irradiating the outer surface of the plastic piece to be sprayed by a mercury lamp capable of generating ultraviolet rays in UVC wave band, and opening chemical bonds on the outer surface of the plastic piece by ozone generated by irradiating air by the mercury lamp so as to change the surface material performance of the plastic piece from hydrophobicity to hydrophilicity.
Wherein the UVC band ultraviolet has two wave peaks which are 185nm and 254nm respectively; the mercury lamp is a low-pressure mercury lamp, namely the partial pressure of mercury vapor is less than 102Pa when discharge is stable.
The irradiation intensity of the mercury lamp irradiation on the surface of the plastic piece is 190-210mj/cm2, and the water drop angle of the material after the mercury lamp irradiation on the surface of the plastic piece is less than or equal to 10 degrees.
Step three S3, performing electrostatic dust removal treatment on the surface of the irradiated plastic piece by using an ion dust removal gun; the wind pressure of the ion dust removal gun is controlled to be 3.5-4.5kg/cm 2.
And step S4, before spraying the water-based paint, spraying a layer of water-based treating agent capable of enhancing the adhesive force of the water-based paint on the outer surface of the plastic part by using a spray gun. Preferably, the aqueous treating agent is a coupling agent, and the coupling agent is Y-divinyltriaminopropylmethyldimethoxysilane/gamma-aminopropyltriethoxysilane or N- (beta-aminoethyl) -Y-aminopropylmethyldimethoxysilane.
And step five S5, naturally drying for 15-20min after spraying the water-based treating agent.
And step six S6, spraying the water-based paint on the outer surface of the plastic piece by using a spray gun.
The water-based paint can be selected from water-based paints which are commercially available for spraying plastic parts.
And step seven, S7, drying the water-based paint after spraying, wherein the drying temperature is 60-70 ℃.
As further shown in fig. 2 to 7, in the first step, the plastic part 10 is first mounted on the jig after being cleaned of dirt, the jig 20 moves along the moving line 7 at a predetermined speed, the moving speed of the jig 20 may preferably be 4 to 6 m/min, in the second step, the plastic part 10 passes through the UV activation device equipped with the mercury lamp during continuous movement, and the outer surface of the plastic part 10 is irradiated by the mercury lamp on the UV activation device.
UV (ultraviolet) activation equipment, including the casing 1 that forms the tunnel shape, casing 1 forms with the frame of removal line 7 and links firmly, and the side is equipped with a plurality of inspection doors 11 about casing 1, and upside, left side and the right side in the casing 1 all are equipped with the mercury lamp 2 that can produce UVC wave band ultraviolet ray, installs on tool 20 before the spraying of working of plastics 10 then along casing 1 continuous movement. The technical parameters of the mercury lamp 2 mounted on the housing 1 correspond to those described in the above-mentioned process steps.
An upper bracket 3 is arranged on the inner upper side of the shell 1, a left bracket 4 is arranged on the inner left side of the shell 1, and a right bracket 5 is arranged on the inner right side of the shell 1; the mercury lamp 2 on the upper side in the casing 1 is arranged on the upper lamp holder 31, and the upper lamp holder 31 is arranged on the upper bracket 3; the mercury lamp 2 on the left side in the shell 1 is arranged on a left lamp holder 41, and the left lamp holder 41 is arranged on a left bracket 4; the mercury lamp 2 on the right side in the casing 1 is mounted on a right lamp holder 51, and the right lamp holder 51 is mounted on a right holder 5.
The upper bracket 3 can be adjusted in position left and right relative to the shell 1, and the upper lamp holder 31 can be adjusted in position up and down relative to the upper bracket 3; the left bracket 4 can be adjusted left and right relative to the shell 1, and the left lamp holder 41 can be adjusted up and down relative to the left bracket 4; the right bracket 5 can be adjusted to the left and right relative to the housing 1, and the right lamp holder 51 can be adjusted to the up and down relative to the left bracket 4.
The upper bracket 3 comprises four first vertical support rods 32, the first vertical support rods 32 are provided with first strip-shaped through holes 321 which are vertically distributed, the upper lamp holder 31 is horizontally arranged, four mounting bolts are distributed, penetrate through the first strip-shaped through holes 321 of the four first vertical support rods 32 and then are screwed on the upper lamp holder 31, and the upper ends of the first vertical support rods 32 can be adjusted left and right relative to the shell 1; the upper end of the first vertical support bar 32 may be mounted on a rail of the frame of the housing 1 by bolts so as to be positionally adjustable.
The left bracket 4 comprises two second vertical support rods 42, second elongated through holes 421 which are vertically distributed are arranged on the second vertical support rods 42, the left lamp holder 41 is vertically arranged, two mounting bolts penetrate through the second elongated through holes 421 of the two second vertical support rods 42 and are screwed on the left lamp holder 41, and the upper ends of the second vertical support rods 42 can be adjusted left and right relative to the shell 1; the upper end of the second vertical support bar 42 may be mounted on a rail of the frame of the housing 1 by bolts so as to be positionally adjustable.
The right bracket 5 comprises two third vertical support rods 52, the third vertical support rods 52 are provided with third elongated through holes 521 which are vertically distributed, the right lamp holder 51 is vertically arranged, two mounting bolts penetrate through the third elongated through holes 521 of the two third vertical support rods 52 and are screwed on the right lamp holder 51, and the upper ends of the third vertical support rods 52 can be adjusted left and right relative to the shell 1; the upper end of the third vertical support bar 52 may be mounted on a rail of the frame of the housing 1 by bolts so as to be positionally adjustable.
The left support 4 and the right support 5 may be disposed in parallel and opposite to each other, or may be disposed at mutually staggered positions as shown in this embodiment.
The upper side of the shell 1 is provided with the mercury lamp 2 control box 6, the mercury lamp 2 control box 6 controls the mercury lamp 2 to emit light, and when the mercury lamp 2 is not on, an alarm device sends out alarm sound. So that the mercury lamp 2 can be replaced and the irradiation power can be controlled in time.
A driving mechanism 8 for driving the jig 20 to rotate is arranged beside the moving line 7, and the jig 20 drives the plastic part 10 to rotate. The plastic member 10 moves along the housing 1 while rotating on its axis during irradiation by the mercury lamp 2. To further improve the uniformity of the illumination.
The moving line 7 comprises two chains 71 moving circularly, a supporting seat 72 is installed between the two chains 71, and the jig 20 is rotatably installed on the supporting seat 72. Two rollers 73 are arranged below the supporting seat 72, and the two rollers 73 respectively move along two supporting rails 74.
The driving mechanism 8 comprises a driving motor 81 and a driving belt 82, the driving motor 81 drives the driving belt 82 to circularly move through a belt pulley 83, the driving belt 82 is in contact with the jig 20 to drive the jig 20 to rotate, and the jig 20 drives the plastic part 10 to rotate.
Install on tool 20 before the spraying of working of plastics 10 and then follow continuous removal in casing 1, working of plastics 10 rotation under actuating mechanism 8 drives simultaneously, working of plastics 10 treats that the spraying surface receives can produce the ultraviolet mercury lamp 2 irradiation of UVC wave band, produce ozone in the air simultaneously, shine and cooperate with ozone and open the chemical bond of working of plastics material, make working of plastics 10 change into hydrophilicity from the hydrophobicity in the short time, then adopt water based paint to accomplish the spraying in effectual time, the material of the working of plastics resumes original performance again after the spraying, effectively promote water based paint's adhesive force and spraying yield, spraying operation environmental protection effect is better.
By utilizing the process method and omitting the step two (irradiating the outer surface of the plastic part to be sprayed by a mercury lamp capable of generating ultraviolet rays in a UVC wave band) in the process method, the spraying effect of the water-based paint on the same plastic part is compared by adopting the same material, and the test effect of the adhesive force is as follows:
the test results show that the spraying adhesion force of the water-based paint after the plastic part is activated by UV (ultraviolet) is obviously better than the spraying effect without UV (ultraviolet) activation. The yield of the spraying is greatly improved.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A process for spraying water-based paint on the surface of a plastic part comprises the following steps:
preparing materials, cleaning, and wiping dirt on the outer surface of a plastic piece to be sprayed;
irradiating the outer surface of the plastic part to be sprayed by using a mercury lamp capable of generating ultraviolet rays in a UVC waveband, and opening chemical bonds on the outer surface of the plastic part by matching with ozone generated by irradiating air by using the mercury lamp so as to change the surface material performance of the plastic part from hydrophobicity to hydrophilicity;
thirdly, performing electrostatic dust removal treatment on the surface of the irradiated plastic part by using an ion dust removal gun;
and step four, spraying the water-based paint on the outer surface of the plastic part by using a spray gun.
2. The process of claim 1, wherein the spraying of the aqueous coating material onto the surface of the plastic part comprises: the UVC wave band ultraviolet rays have two wave peaks which are 185nm and 254nm respectively;
the mercury lamp is a low-pressure mercury lamp, namely the partial pressure of mercury vapor is less than 102Pa when discharge is stable.
3. The process of claim 1, wherein the spraying of the aqueous coating material onto the surface of the plastic part comprises: the irradiation intensity of the mercury lamp irradiation on the surface of the plastic piece is 190-210mj/cm2, and the water drop angle of the material after the mercury lamp irradiation on the surface of the plastic piece is less than or equal to 10 degrees.
4. The process of claim 1, wherein the spraying of the aqueous coating material onto the surface of the plastic part comprises: and step four, before spraying the water-based paint, spraying a layer of water-based treating agent capable of enhancing the adhesive force of the water-based paint on the outer surface of the plastic part by using a spray gun, then naturally drying, and then spraying the water-based paint in the step four.
5. The process of claim 4, wherein the spraying of the aqueous coating material onto the surface of the plastic part comprises: the water-based treating agent is a coupling agent, and the coupling agent is Y-divinyltriaminopropylmethyldimethoxysilane/gamma-aminopropyltriethoxysilane or N- (beta-aminoethyl) -Y-aminopropylmethyldimethoxysilane.
6. A process according to any one of claims 1 to 5, wherein the spraying of the aqueous coating material onto the surface of the plastic part comprises: and secondly, the plastic part passes through UV activation equipment provided with the mercury lamp in the continuous moving process, and the outer surface of the plastic part is irradiated by the mercury lamp on the UV activation equipment.
7. The process of claim 6, wherein the spraying of the aqueous coating material onto the surface of the plastic part comprises: the UV activation apparatus includes a tunnel-shaped housing, the upper, left and right sides of which are provided with the mercury lamp capable of generating UV rays in the UVC band, and the plastic member is moved along the housing and irradiated by the mercury lamp.
8. The process of claim 7, wherein the spraying of the aqueous coating material onto the surface of the plastic part comprises: an upper bracket is arranged at the upper side in the shell, a left bracket is arranged at the left side in the shell, and a right bracket is arranged at the right side in the shell; the mercury lamp on the upper side in the shell is arranged on the upper lamp holder, and the upper lamp holder is arranged on the upper bracket; the mercury lamp on the left side in the shell is arranged on a left lamp holder, and the left lamp holder is arranged on a left bracket; the mercury lamp on the right side in the shell is arranged on a right lamp holder, and the right lamp holder is arranged on a right bracket;
the upper bracket can be adjusted in position left and right relative to the shell, and the upper lamp holder can be adjusted in position up and down relative to the upper bracket; the left bracket can be adjusted left and right relative to the shell, and the left lamp holder can be adjusted up and down relative to the left bracket; the right support can be adjusted in position left and right relative to the shell, and the right lamp holder can be adjusted in position up and down relative to the left support.
9. The process of claim 6, wherein the spraying of the aqueous coating material onto the surface of the plastic part comprises: and a driving mechanism is arranged beside the moving line and drives the jig to rotate, the jig drives the plastic piece to rotate, and the plastic piece rotates and moves along the shell.
10. The process of claim 9, wherein the spraying of the aqueous coating material onto the surface of the plastic part comprises: the moving line comprises two chains which move circularly, a supporting seat is arranged between the two chains, and the jig is rotatably arranged on the supporting seat;
the driving mechanism comprises a driving motor and a driving belt, the driving motor drives the driving belt to circularly move through a belt pulley, and the driving belt is in contact with the jig to drive the jig to rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011215995.5A CN112439669A (en) | 2020-11-04 | 2020-11-04 | Process for spraying water-based paint on surface of plastic part |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011215995.5A CN112439669A (en) | 2020-11-04 | 2020-11-04 | Process for spraying water-based paint on surface of plastic part |
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| Publication Number | Publication Date |
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| CN112439669A true CN112439669A (en) | 2021-03-05 |
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| CN202011215995.5A Pending CN112439669A (en) | 2020-11-04 | 2020-11-04 | Process for spraying water-based paint on surface of plastic part |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1531465A (en) * | 2001-03-21 | 2004-09-22 | 普利司通股份有限公司 | Method for forming antifouling coating and antifouling material having antifouling coating |
| KR20060042251A (en) * | 2004-10-27 | 2006-05-12 | 옵티맥스 테크놀러지 코포레이션 | Dry treatment method for decreasing contact angle on an optical film surface |
| CN205833579U (en) * | 2016-03-29 | 2016-12-28 | 江门市东健粉末涂装科技有限公司 | Uv curing oven |
| CN110872470A (en) * | 2018-08-31 | 2020-03-10 | 夏普株式会社 | Photocatalyst coating material, method for producing same, and method for producing photocatalyst body |
-
2020
- 2020-11-04 CN CN202011215995.5A patent/CN112439669A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1531465A (en) * | 2001-03-21 | 2004-09-22 | 普利司通股份有限公司 | Method for forming antifouling coating and antifouling material having antifouling coating |
| KR20060042251A (en) * | 2004-10-27 | 2006-05-12 | 옵티맥스 테크놀러지 코포레이션 | Dry treatment method for decreasing contact angle on an optical film surface |
| CN205833579U (en) * | 2016-03-29 | 2016-12-28 | 江门市东健粉末涂装科技有限公司 | Uv curing oven |
| CN110872470A (en) * | 2018-08-31 | 2020-03-10 | 夏普株式会社 | Photocatalyst coating material, method for producing same, and method for producing photocatalyst body |
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