CN114011676A - High-glossiness automobile injection molding surface spraying process - Google Patents

High-glossiness automobile injection molding surface spraying process Download PDF

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Publication number
CN114011676A
CN114011676A CN202111383217.1A CN202111383217A CN114011676A CN 114011676 A CN114011676 A CN 114011676A CN 202111383217 A CN202111383217 A CN 202111383217A CN 114011676 A CN114011676 A CN 114011676A
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Prior art keywords
spraying
injection molding
parts
product
automobile injection
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CN202111383217.1A
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Inventor
吴晓洪
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Tian Si Li Plastics Co ltd
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Tian Si Li Plastics Co ltd
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Priority to CN202111383217.1A priority Critical patent/CN114011676A/en
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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
    • 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
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • 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
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
    • B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate 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
    • B05D3/101—Pretreatment of polymeric 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
    • B05D3/12—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 mechanical means
    • 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
    • B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
    • B05D5/067—Metallic effect
    • 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
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C09D133/04—Homopolymers or copolymers of esters
    • C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C09D133/10—Homopolymers or copolymers of methacrylic acid esters
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C09D133/04—Homopolymers or copolymers of esters
    • C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C09D133/10—Homopolymers or copolymers of methacrylic acid esters
    • C09D133/12—Homopolymers or copolymers of methyl methacrylate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/38—Paints containing free metal not provided for above in groups C09D5/00 - C09D5/36
    • 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
    • B05D2201/00—Polymeric substrate or laminate
    • B05D2201/02—Polymeric 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
    • B05D2502/00—Acrylic polymers
    • 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
    • B05D2601/00—Inorganic fillers
    • B05D2601/02—Inorganic fillers used for pigmentation effect, e.g. metallic effect
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/08—Metals
    • C08K2003/0806—Silver

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The invention provides a high-gloss surface spraying process for an automobile injection molding part, which belongs to the technical field of spraying and comprises the following steps: s1: removing burrs on the surface of the automobile injection molding part to be polished, soaking the automobile injection molding part in a cleaning agent for 20min, performing ultrasonic vibration, taking out the automobile injection molding part, and blowing the automobile injection molding part to dry the surface; s2: shielding the part of the product which does not need to be sprayed by adopting a jig; s3: spraying varnish by using a spray gun, and drying after spraying; s4: and (5) spraying the colored paint by using a spray gun, drying, removing the jig on the surface of the product, and finishing the spraying operation of the product. According to the high-glossiness automobile injection molding surface spraying process, the jig is adopted in the shielding area, so that the shielding area can be completely shielded, the accuracy of the spraying area is ensured, the operation is convenient, the spraying efficiency is improved, and in addition, the jig can be repeatedly used for multiple times; the paint is added with metal powder, the formula design is reasonable, and the surface of the plastic part has high glossiness with metal texture.

Description

High-glossiness automobile injection molding surface spraying process
Technical Field
The invention belongs to the technical field of spraying, and particularly relates to a high-gloss surface spraying process for an automobile injection molding.
Background
With the increase of the automobile demand, the automobile industry is also rapidly developed, and in order to reduce the weight of the automobile, a plurality of automobile interior parts are made of plastic parts and matched with metal shells, so that the impact resistance of the automobile can be ensured, the weight of the automobile can be reduced, the oil consumption is reduced, and the preparation cost is reduced. Along with the improvement of the prior art to the automobile performance, the appearance requirement of consumers to the automobile is gradually improved, the appearance of the automobile adopting plastic parts is not as good as that of metal parts, the aesthetic value of the automobile can be reduced, and the sales volume is reduced.
In order to solve the problems, many enterprises spray the surface of the plastic part to ensure that the plastic part has metallic luster, so that the aesthetic property can be improved, and the cost can be saved within a certain range. However, the adhesion between the surface of the plastic part and the paint film is not as good as that between the metal and the paint film, and the paint spraying on the surface of many plastic parts cannot show metallic luster, so that the requirements of consumers cannot be met; in addition, the part which does not need to be painted is generally covered by adopting adhesive tape sticking, and the adhesive tape is torn off after the painting is finished, so that the accurate covering of the painting area cannot be ensured, the working time and the labor are consumed, and the whole efficiency is lower.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the high-glossiness automobile injection molding surface spraying process, which can completely shield a shielding area by adopting a jig in the shielding area, ensures the accuracy of the spraying area, is convenient to operate, improves the spraying efficiency, and can be repeatedly used; the paint is added with metal powder, the formula design is reasonable, and the surface of the plastic part has high glossiness with metal texture.
In order to achieve the purpose, the invention is realized by the following technical scheme: a high-gloss surface spraying process for automobile injection parts comprises the following steps:
s1: removing burrs on the surface of an automobile injection molding part to be polished, cleaning surface dust, soaking the product in a cleaning agent for 20min, removing surface grease by adopting ultrasonic vibration, taking out and blowing the surface dry;
s2: dividing a product into areas needing spraying, and shielding parts needing no spraying by adopting a jig;
s3: spraying varnish on the area to be sprayed by using a spray gun, standing the product at room temperature for 1-5min after spraying, and drying at 60 +/-5 ℃ for 1-5 min;
s4: and then, spraying the colored paint on the surface of the product by using a spray gun, after the spraying is finished, placing the product at room temperature for 1-5min, drying at 60 +/-5 ℃ for 15-25min, and after the colored paint is dried, removing the surface jig of the product to finish the spraying operation of the product.
Further, the cleaning agent in the step 1 is industrial ethanol. Remove oil stains and sundries on the surface of the product and ensure that the paint film is well combined with the product.
Furthermore, the jig in the step 2 is a plastic part matched with the structure and shape of the product shielding area. The jig with the structure can completely shield the shielding area, ensures the accuracy of the spraying area, is convenient to operate, improves the spraying efficiency, and can be repeatedly used.
Furthermore, the caliber of the spray gun in the step 3 and the step 4 is 1.3-1.5mm, the moving speed of the spray gun is 0.1-0.2m/s, the spraying pressure is 0.3-0.4MPa, the spraying distance is 0.2-0.25m, and the spraying amount is 80-100 ml/min.
Further, the varnish in the step 3 comprises the following components in parts by mass:
25-30 parts of methyl methacrylate;
10-15 parts of n-butyl methacrylate;
30-45 parts of dimethylbenzene.
Further, the colored paint in the step 4 comprises the following components in parts by mass:
Figure BDA0003366419870000031
further, the thermoplastic polyacrylate coating comprises the following components in a mass ratio of 1: 1-2: 1-1.5 of methyl methacrylate, ethyl methacrylate and butyl methacrylate.
Further, the metal powder can adopt silver powder, zinc powder or aluminum powder, and the pigment is titanium dioxide. The metal powder can make the paint film have high glossiness with metal texture, the variety can be selected according to the requirement, and the pigment can enhance the colorability of the paint film and make the paint film have bright color.
Furthermore, the plasticizer can be selected from polyethylene glycol or epoxidized soybean oil, and the solvent is ethylene glycol butyl ether.
Further, the auxiliary agent is N, N-dimethylethanolamine, and the diluent is xylene. The N, N-dimethylethanolamine can promote film-forming solidification.
Has the advantages that: compared with the prior art, the invention has the following advantages: according to the high-glossiness automobile injection molding surface spraying process provided by the invention, the jig is adopted in the shielding region, so that the shielding region can be completely shielded, the accuracy of the spraying region is ensured, the operation is convenient, the spraying efficiency is improved, and the jig can be repeatedly used for many times; the product surface adopts a varnish and paint spraying mode, so that the adhesive force between a paint film and the product can be enhanced, and the wear resistance is improved; the paint is added with metal powder, the formula design is reasonable, and the surface of the plastic part has high glossiness with metal texture.
Detailed Description
The invention will now be further illustrated by reference to the following specific examples.
Example 1
A high-gloss surface spraying process for automobile injection parts comprises the following steps:
s1: removing burrs on the surface of an automobile injection molding part to be polished, cleaning surface dust, soaking the product in industrial ethanol for 20min, removing surface grease by adopting ultrasonic vibration, taking out the product, and drying the surface by blowing;
s2: dividing a product into areas needing spraying, and shielding parts needing no spraying by using a jig, wherein the jig is a plastic part matched with the structure and the shape of the shielded area of the product;
s3: spraying varnish on the area to be sprayed by using a spray gun, standing the product at room temperature for 1min after spraying is finished, and drying the product at 55 ℃ for 1 min;
s4: and then, spraying the colored paint on the surface of the product by using a spray gun, after the spraying is finished, placing the product at room temperature for 1min, drying at 55 ℃ for 15min, and after the colored paint is dried, removing the surface jig of the product to finish the spraying operation of the product.
Wherein, the caliber of the spray gun in the step 3 and the step 4 is 1.3mm, the moving speed of the spray gun is 0.1m/s, the spraying pressure is 0.3MPa, the spraying distance is 0.2m, and the spraying amount is 80 ml/min.
In addition, the varnish in the step 3 comprises the following components in parts by mass:
25 parts of methyl methacrylate;
10 parts of n-butyl methacrylate;
30 parts of dimethylbenzene.
In addition, the colored paint in the step 4 comprises the following components in parts by mass:
Figure BDA0003366419870000051
Figure BDA0003366419870000052
the thermoplastic polyacrylate coating comprises the following components in percentage by mass of 1:1 of methyl methacrylate, ethyl methacrylate and butyl methacrylate.
Example 2
A high-gloss surface spraying process for automobile injection parts comprises the following steps:
s1: removing burrs on the surface of an automobile injection molding part to be polished, cleaning surface dust, soaking the product in industrial ethanol for 20min, removing surface grease by adopting ultrasonic vibration, taking out the product, and drying the surface by blowing;
s2: dividing a product into areas needing spraying, and shielding parts needing no spraying by using a jig, wherein the jig is a plastic part matched with the structure and the shape of the shielded area of the product;
s3: spraying varnish on the area to be sprayed by using a spray gun, standing the product at room temperature for 5min after spraying, and drying the product at 65 ℃ for 5 min;
s4: and then, spraying the colored paint on the surface of the product by using a spray gun, after the spraying is finished, placing the product at room temperature for 5min, drying at 65 ℃ for 25min, and after the colored paint is dried, removing the surface jig of the product to finish the spraying operation of the product.
Wherein, the caliber of the spray gun in the step 3 and the step 4 is 1.5mm, the moving speed of the spray gun is 0.2m/s, the spraying pressure is 0.4MPa, the spraying distance is 0.25m, and the spraying amount is 100 ml/min.
In addition, the varnish in the step 3 comprises the following components in parts by mass:
30 parts of methyl methacrylate;
15 parts of n-butyl methacrylate;
45 parts of dimethylbenzene.
In addition, the colored paint in the step 4 comprises the following components in parts by mass:
Figure BDA0003366419870000061
Figure BDA0003366419870000062
the thermoplastic polyacrylate coating comprises the following components in percentage by mass of 1: 1-2: 1-1.5 of methyl methacrylate, ethyl methacrylate and butyl methacrylate.
Example 3
A high-gloss surface spraying process for automobile injection parts comprises the following steps:
s1: removing burrs on the surface of an automobile injection molding part to be polished, cleaning surface dust, soaking the product in industrial ethanol for 20min, removing surface grease by adopting ultrasonic vibration, taking out the product, and drying the surface by blowing;
s2: the product is divided into areas needing spraying, the parts needing no spraying are shielded by a jig,
the jig adopts a plastic part matched with the structure and the shape of the product shielding area;
s3: spraying varnish on the area to be sprayed by using a spray gun, standing the product at room temperature for 3min after spraying is finished, and drying the product at 60 ℃ for 3 min;
s4: and then, spraying the colored paint on the surface of the product by using a spray gun, standing the product at room temperature for 3min after the spraying is finished, drying the product at 60 ℃ for 20min, and removing the jig on the surface of the product after the colored paint is dried to finish the spraying operation of the product.
Wherein, the caliber of the spray gun in the step 3 and the step 4 is 1.4mm, the moving speed of the spray gun is 0.15m/s, the spraying pressure is 0.35MPa, the spraying distance is 0.22m, and the spraying amount is 90 ml/min.
In addition, the varnish in the step 3 comprises the following components in parts by mass:
27 parts of methyl methacrylate;
13 parts of n-butyl methacrylate;
and 37 parts of xylene.
In addition, the colored paint in the step 4 comprises the following components in parts by mass:
Figure BDA0003366419870000071
Figure BDA0003366419870000072
the thermoplastic polyacrylate coating comprises the following components in percentage by mass of 1: 1.5: 1.2 methyl methacrylate, ethyl methacrylate and butyl methacrylate.
Comparative example 1
This comparative example is that of example 3, which contains no silver powder in the lacquer component, the other components being identical and the process being identical.
Comparative example 2
This comparative example is that of example 3, in which the silver powder content in the paint composition was 6 parts, the other components were the same, and the process was the same.
Comparative example 3
The comparative example is that of example 3, the paint spraying component does not contain titanium dioxide, other components and proportions are the same, and the process is the same.
Performance testing
In order to verify that the injection molded part sprayed by the high-gloss automobile injection molded part surface spraying process has good gloss and various performances of a film, the injection molded parts after film coating prepared in the embodiments are respectively subjected to the following tests, and the specific test results are shown in the following table 1.
Table 1 results of performance testing
Figure BDA0003366419870000081
Figure BDA0003366419870000091
From the results, the metal powder is added in the spray painting process by adopting the spraying process, so that the surface of the obtained automobile injection molding part has better glossiness, and the paint film has better adhesiveness and wear resistance, but the content of the metal powder cannot be too much, so that the adhesiveness is reduced and the appearance smoothness is reduced; the pigment is added to make the pigment have better color and luster and appearance.
The foregoing is directed to embodiments of the present invention and, more particularly, to a method and apparatus for controlling a power converter in a power converter, including a power converter, a display and a display panel.

Claims (10)

1. The high-gloss surface spraying process for the automobile injection molding part is characterized by comprising the following steps of: s1: removing burrs on the surface of an automobile injection molding part to be polished, cleaning surface dust, soaking the product in a cleaning agent for 20min, removing surface grease by adopting ultrasonic vibration, taking out and blowing the surface dry;
s2: dividing a product into areas needing spraying, and shielding parts needing no spraying by adopting a jig;
s3: spraying varnish on the area to be sprayed by using a spray gun, standing the product at room temperature for 1-5min after spraying, and drying at 60 +/-5 ℃ for 1-5 min;
s4: and then, spraying the colored paint on the surface of the product by using a spray gun, after the spraying is finished, placing the product at room temperature for 1-5min, drying at 60 +/-5 ℃ for 15-25min, and after the colored paint is dried, removing the surface jig of the product to finish the spraying operation of the product.
2. The process for spraying the surface of the high-gloss automobile injection molding part according to claim 1, wherein the process comprises the following steps: the cleaning agent in the step 1 is industrial ethanol.
3. The process for spraying the surface of the high-gloss automobile injection molding part according to claim 1, wherein the process comprises the following steps: and (3) adopting a plastic part matched with the structure and the shape of the product shielding area as the jig in the step (2).
4. The process for spraying the surface of the high-gloss automobile injection molding part according to claim 1, wherein the process comprises the following steps: the caliber of the spray gun in the step 3 and the step 4 is 1.3-1.5mm, the moving speed of the spray gun is 0.1-0.2m/s, the spraying pressure is 0.3-0.4MPa, the spraying distance is 0.2-0.25m, and the spraying quantity is 80-100 ml/min.
5. The process for spraying the surface of the high-gloss automobile injection molding part according to claim 1, wherein the process comprises the following steps: the varnish in the step 3 comprises the following components in parts by mass: 25-30 parts of methyl methacrylate;
10-15 parts of n-butyl methacrylate;
30-45 parts of dimethylbenzene.
6. The process for spraying the surface of the high-gloss automobile injection molding part according to claim 1, wherein the process comprises the following steps: the colored paint in the step 4 comprises the following components in parts by mass:
25-35 parts of thermoplastic polyacrylate coating;
1-5 parts of metal powder;
1-3 parts of pigment;
5-10 parts of a plasticizer;
45-65 parts of a solvent;
1-5 parts of an auxiliary agent;
15-25 parts of a diluent.
7. The process of claim 6, wherein the spray coating process is carried out on the surface of the high-gloss automobile injection molding part: the thermoplastic polyacrylate coating comprises the following components in percentage by mass of 1: 1-2: 1-1.5 of methyl methacrylate, ethyl methacrylate and butyl methacrylate.
8. The process of claim 6, wherein the spray coating process is carried out on the surface of the high-gloss automobile injection molding part: the metal powder can adopt silver powder, zinc powder or aluminum powder, and the pigment is titanium dioxide.
9. The process of claim 6, wherein the spray coating process is carried out on the surface of the high-gloss automobile injection molding part: the plasticizer can be selected from polyethylene glycol or epoxidized soybean oil, and the solvent is ethylene glycol monobutyl ether.
10. The process of claim 6, wherein the spray coating process is carried out on the surface of the high-gloss automobile injection molding part: the auxiliary agent is N, N-dimethylethanolamine, and the diluent is xylene.
CN202111383217.1A 2021-11-22 2021-11-22 High-glossiness automobile injection molding surface spraying process Pending CN114011676A (en)

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Citations (4)

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Publication number Priority date Publication date Assignee Title
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Application publication date: 20220208