CN111906004A - Production method of high-gloss UV (ultraviolet) paint spraying product - Google Patents
Production method of high-gloss UV (ultraviolet) paint spraying product Download PDFInfo
- Publication number
- CN111906004A CN111906004A CN202010596834.9A CN202010596834A CN111906004A CN 111906004 A CN111906004 A CN 111906004A CN 202010596834 A CN202010596834 A CN 202010596834A CN 111906004 A CN111906004 A CN 111906004A
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- Prior art keywords
- product
- injection molding
- polishing
- spraying
- workpiece
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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
- 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
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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
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
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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
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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
- B05D3/007—After-treatment
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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
- B05D3/02—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
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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
- B05D3/06—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.
- B05D3/065—After-treatment
- B05D3/067—Curing or cross-linking the coating
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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
- 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
- B05D7/24—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 for applying particular liquids or other fluent materials
- B05D7/26—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 for applying particular liquids or other fluent materials synthetic lacquers or varnishes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1615—The materials being injected at different moulding stations
Abstract
The invention relates to the field of highlight UV paint spraying, in particular to a production method of a highlight UV paint spraying product, which adopts a double-color injection molding machine to carry out double-color injection molding; putting the semi-finished product after injection molding into a drying box to release internal stress; naturally cooling at room temperature after drying; cleaning floating ash and dirt of the semi-finished product by using an electrostatic dust collector or a plasma electrostatic dust collection gun; spraying, infrared leveling and UV curing, drying and then modifying. The high-gloss UV product processed by the method has the defects of no wave, small expansion edge, controllable orange peel, no sink mark and the like on the surface. The UV qualification rate is high, and the surface defects can be effectively controlled and improved.
Description
Technical Field
The invention relates to the field of high-gloss UV paint spraying, in particular to a production method of a high-gloss UV paint spraying product.
Background
The original high-gloss UV paint spraying processing method is easy to cause surface defects, such as waves, expansion edges, orange peels, shrinkage marks and the like, and influences the attractiveness and service life of the product due to technical problems.
Disclosure of Invention
The invention aims to solve the technical problem of providing a production method of a high-gloss UV paint spraying product, and solving the defects of wave, expansion edge, orange peel, shrinkage mark and the like on the surface of the high-gloss UV product.
The present invention is achieved in such a way that,
a method of producing a high gloss UV lacquered product, the method comprising:
double-shot injection molding is carried out by adopting a double-shot injection molding machine, the raw material is selected from PC/ABS, injection molding is carried out twice, and the second shot is a photophobic surface; making a concave curved surface at 4mm from the edge of the product to be painted, wherein the concave height of the concave curved surface is 0.25mm, and then guiding an angle R0.5mm from the edge of the product to be painted;
putting the semi-finished product after injection molding into a drying box to release internal stress, and keeping the temperature at 80-85 ℃ for 30-40 min;
naturally cooling at room temperature after drying, clamping the semi-finished product on a spray painting hanger after cooling, and wiping with wiping cloth and isopropanol;
cleaning floating ash and dirt of the semi-finished product by using an electrostatic dust collector or a plasma electrostatic dust collection gun;
spraying, wherein the thickness of a painting film required by a spraying process is 35-45 mu m; the leveling time is 9-12 min; gun distance: gun speed of 12-18 cm: angle of 20-30 cm/s: the nozzle of the spray gun is 90 degrees to the coated surface; the adhesive force is less than or equal to Gt 1; the illumination of the spray booth is more than or equal to 800LUX, the room temperature of the spray booth is 21-26 ℃, the humidity of the spray booth is 40-70%, the spraying pressure is 0.4-0.6MPa, and the air pressure of the spray booth is slightly negative;
after spraying, carrying out infrared leveling and UV curing, wherein the UV curing infrared temperature is constant and is 40-60 ℃; the leveling time is 10-20 min; the energy of the UV curing furnace needs to reach 1000-2The strength reaches 300-700mW/cm2；
Drying at constant temperature of 80-90 deg.C for 40-45 min;
picking the workpieces off the hanger, and respectively placing the workpieces in a turnover appliance according to states;
modification: an operator takes a workpiece and then inspects quality defects of the surface of the workpiece, modifies the defects, bonds the workpiece on a grinding machine by using No. 2500 plum blossom sand paper for grinding, dips polishing paste on the grinding defect part by using a brush, and polishes and modifies the workpiece by using the grinding machine and a wool ball.
Further, modifying the defect comprises: using 3M white paste 81235: mixing and stirring uniformly yellow paste 82877 in a ratio of 2:1, and modifying grinding points; after finishing, the workpiece was finished in its entirety using gray 82877.
Further, the method comprises the steps of carrying out mold processing before double-color injection molding, processing the mold by adopting a precision electric spark inlet pure copper electrode, polishing by using 600# oilstone after processing, further polishing by using 800# abrasive paper and 1000# abrasive paper in sequence, finely polishing by using 1200# abrasive paper, 1500# abrasive paper and 2000# abrasive paper in sequence, and finally polishing by using grinding paste and a wool ball.
Compared with the prior art, the invention has the beneficial effects that:
the high-gloss UV product processed by the method has the defects of no wave, small expansion edge, controllable orange peel, no sink mark and the like on the surface. The UV qualification rate is high, and the surface defects can be effectively controlled and improved.
Drawings
FIG. 1 is a schematic diagram of the edge structure of the product processed by the method of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A method of producing a high gloss UV lacquered product, the method comprising:
the processing method of the die comprises the following steps: and in the mould processing stage, a precise electric spark inlet pure copper electrode is adopted for processing (if necessary, the model of a machine tool and processing parameters can be provided), 600# oilstone is used for polishing after processing, 800# and 1000# abrasive paper is further used for polishing, 1200# abrasive paper, 1500# abrasive paper and 2000# abrasive paper are used for fine polishing, and finally polishing is finished by using grinding paste and wool balls, so that the mould is required to be smooth and have no ripples.
Adopting a double-color injection molding machine for double-color injection molding, adopting a Haitian 250T double-color injection molding machine, selecting raw materials from PC/ABS, PC/ABS, Polycarbonate and acrylonitrile-butadiene-styrene copolymer and mixture, combining Polycarbonate (Polycarbonate) and acrylonitrile-butadiene-styrene copolymer (ABS) to form thermoplastic plastic, performing injection molding twice, and using a second injection as a photophobic surface; in order to prevent the edge expansion defect of the natural phenomenon of the edge after UV spraying, a concave curved surface is formed at the position 4mm away from the edge of the product to be sprayed by setting a die, the concave height of the concave curved surface is 0.25mm, and then the edge of the product to be sprayed leads an angle R0.5mm, which is shown in figure 1 and is in an oval range;
putting the semi-finished product after injection molding into a drying box to release internal stress, and keeping the temperature at 80-85 ℃ for 30-40 min;
naturally cooling at room temperature after drying, clamping the semi-finished product on a painting hanger after cooling, and wiping with a wiping towel and isopropanol (because the mould is mirror polished, a grinding process is saved before painting);
cleaning floating ash and dirt of the semi-finished product by using an electrostatic dust collector or a plasma electrostatic dust collection gun;
spraying, wherein the thickness of a painting film required by a spraying process is 35-45 mu m; the leveling time is 9-12 min; gun distance: gun speed of 12-18 cm: angle of 20-30 cm/s: the nozzle of the spray gun is 90 degrees to the coated surface; the adhesive force is less than or equal to Gt 1; the illumination of the paint spraying chamber is more than or equal to 800LUX, the room temperature of the paint spraying is 21-26 ℃, the paint spraying humidity is 40-70%, the spraying pressure is 0.4-0.6MPa, and the atmospheric pressure micro negative pressure of the paint spraying chamber (white paper strips are pasted in the paint spraying chamber, and the micro deviation of the paper strips to the inner side of the paint spraying chamber is observed to belong to the micro negative pressure);
after spraying, carrying out infrared leveling and UV curing, wherein the UV curing infrared temperature is constant and is 40-60 ℃; the leveling time is 10-20 min; the energy of the UV curing oven needs to reach 1000-3000mJ/cm2The strength reaches 300-700mW/cm2；
Drying at constant temperature of 80-90 deg.C for 40-45 min;
picking the workpieces off the hanger, and respectively placing the workpieces in a turnover appliance according to states;
modification: an operator takes a workpiece and then inspects quality defects of the surface of the workpiece, modifies the defects, bonds the workpiece on a grinding machine by using No. 2500 plum blossom sand paper for grinding, dips polishing paste on the grinding defect part by using a brush, and polishes and modifies the workpiece by using the grinding machine and a wool ball.
Further, modifying the defect comprises: using 3M white paste 81235: mixing and stirring uniformly yellow paste 82877 in a ratio of 2:1, and modifying grinding points; after finishing, the workpiece was finished in its entirety using gray 82877.
Packaging; the modified product is naturally stored for 15min and then is boxed.
The product prepared by the method uses a film thickness meter to measure the thickness of a paint film of the surface paint by 32-38 mu;
the lamp tube illuminated on the surface of the product prepared by the method is linear under a three-color light source, the reflected light is not allowed to be diffused and bent, and the surface has no paint film defects such as paint flowing, bottom exposure, virtual spraying, paint mist, color difference, color pattern, orange peel, collision scratch, particles, dirt, dirty points, shrinkage cavities, mottling, paint points, plastic marks (welding marks), sand paper marks and the like.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (3)
1. A method for producing a high gloss UV lacquered product, the method comprising:
double-shot injection molding is carried out by adopting a double-shot injection molding machine, the raw material is selected from PC/ABS, injection molding is carried out twice, and the second shot is a photophobic surface; making a concave curved surface at 4mm from the edge of the product to be painted, wherein the concave height of the concave curved surface is 0.25mm, and then leading the edge of the product to be painted to an angle of R0.5 mm;
putting the semi-finished product after injection molding into a drying box to release internal stress, and keeping the temperature at 80-85 ℃ for 30-40 min;
naturally cooling at room temperature after drying, clamping the semi-finished product on a spray painting hanger after cooling, and wiping with wiping cloth and isopropanol;
cleaning floating ash and dirt of the semi-finished product by using an electrostatic dust collector or a plasma electrostatic dust collection gun;
spraying, wherein the thickness of a painting film required by a spraying process is 35-45 mu m; the leveling time is 9-12 min; gun distance: gun speed of 12-18 cm: angle of 20-30 cm/s: the nozzle of the spray gun is 90 degrees to the coated surface; the adhesive force is less than or equal to Gt 1; the illumination of the spray booth is more than or equal to 800LUX, the room temperature of the spray booth is 21-26 ℃, the humidity of the spray booth is 40-70%, the spraying pressure is 0.4-0.6MPa, and the air pressure of the spray booth is slightly negative;
after spraying, carrying out infrared leveling and UV curing, wherein the UV curing infrared temperature is constant and is 40-60 ℃; the leveling time is 10-20 min; the energy of the UV curing furnace needs to reach 1000-2The strength reaches 300-700mW/cm2；
Drying at constant temperature of 80-90 deg.C for 40-45 min;
picking the workpieces off the hanger, and respectively placing the workpieces in a turnover appliance according to states;
modification: an operator takes a workpiece and then inspects quality defects of the surface of the workpiece, modifies the defects, bonds the workpiece on a grinding machine by using No. 2500 plum blossom sand paper for grinding, dips polishing paste on the grinding defect part by using a brush, and polishes and modifies the workpiece by using the grinding machine and a wool ball.
2. The method of claim 1, wherein modifying the defect comprises: using 3M white paste 81235: mixing and stirring uniformly yellow paste 82877 in a ratio of 2:1, and modifying grinding points; after finishing, the workpiece was finished in its entirety using gray 82877.
3. The method of claim 1, further comprising performing mold machining prior to the two-shot molding, the mold machining using precision electric spark inlet pure copper electrode machining, polishing with 600# oilstone after machining, further polishing with 800# abrasive paper, polishing with 1000# abrasive paper, polishing with 1200# abrasive paper, 1500# abrasive paper, and 2000# abrasive paper in sequence, and finally finishing the polishing using a grinding paste plus wool balls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010596834.9A CN111906004A (en) | 2020-06-28 | 2020-06-28 | Production method of high-gloss UV (ultraviolet) paint spraying product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010596834.9A CN111906004A (en) | 2020-06-28 | 2020-06-28 | Production method of high-gloss UV (ultraviolet) paint spraying product |
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| Publication Number | Publication Date |
|---|---|
| CN111906004A true CN111906004A (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010596834.9A Pending CN111906004A (en) | 2020-06-28 | 2020-06-28 | Production method of high-gloss UV (ultraviolet) paint spraying product |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102146227A (en) * | 2011-01-18 | 2011-08-10 | 深圳市嘉卓成科技发展有限公司 | Transparent acrylic single-coating UV (Ultraviolet) radiation curing coating as well as production method and application method thereof |
| CN106000831A (en) * | 2016-05-31 | 2016-10-12 | 上海子元汽车零部件有限公司 | Method for eliminating fat edges of high-brightness UV curing paint edges |
-
2020
- 2020-06-28 CN CN202010596834.9A patent/CN111906004A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102146227A (en) * | 2011-01-18 | 2011-08-10 | 深圳市嘉卓成科技发展有限公司 | Transparent acrylic single-coating UV (Ultraviolet) radiation curing coating as well as production method and application method thereof |
| CN106000831A (en) * | 2016-05-31 | 2016-10-12 | 上海子元汽车零部件有限公司 | Method for eliminating fat edges of high-brightness UV curing paint edges |
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