CN102416373B - High gloss coating process of surface of plastic substrate - Google Patents
High gloss coating process of surface of plastic substrate Download PDFInfo
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- CN102416373B CN102416373B CN201110283405.7A CN201110283405A CN102416373B CN 102416373 B CN102416373 B CN 102416373B CN 201110283405 A CN201110283405 A CN 201110283405A CN 102416373 B CN102416373 B CN 102416373B
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Abstract
The invention relates to the technical field of material surface treatment, and in particular relates to a high gloss coating process of the surface of a plastic substrate. The process comprises the following steps of: A. cleaning, B. surface pretreatment, C. coating blending, D. surface spraying, E. standing and F. roasting. The process has the following beneficial effects that: by controlling the processing technic conditions, the problems easily occurring on the surface of the product such as oil deposition, pitted surface, particles, picture frame effect and the like are effectively reduced; therefore the product surface has good levelling property, the formed coat is dense and uniform, the surface is bright and the polishing yield and first yield of the finished product of the plastic substrate are high; and besides, the adhesive property of the coating on the surface of the plastic substrate is improved by spraying the diluted coating on the surface of the plastic substrate, thus ensuring the uniformity of the coat and improving the product percent of pass.
Description
Technical field
The present invention relates to surface treatment technology of material field, particularly the high light coating process in a kind of surface of plastic rubber substrate.
Background technology
The auto parts machinery that some are made as elastomeric materials such as the plastics such as Merlon (PC), ethylene propylene diene rubbers (EPDM), as air bag cover, console etc., after substrate forming, need to carry out sprayed surface, to improve product surface quality, obtain the surface decoration effect needing.At present, in order to reach the high light effect of plastic cement products case surface, mainly adopt two kinds of techniques: traditional UV radiation (UV) spraying coating process and quick-cooling and quick-warming high-light no-trace Shooting Technique.
Adopt quick-cooling and quick-warming high-light no-trace Shooting Technique, can make that product surface is smooth, surface gloss good, there is good vividness and decorative effect.But due to technical reason, while using this technique, need expensive injection moulding peripheral equipment that the medium of quick-cooling and quick-warming and control device are accurately provided, for preventing from generating the high-light no-trace injection-die complex structure that weld mark is developed quick-cooling and quick-warming specially, costly, and need employing better than common plastic material mobility, can produce the plastic cement raw material of special high light effect.When injection moulding is produced, also need continuous grinding and polishing molding surface to obtain satisfied product surface effect, cause injection molding cycle to extend, production efficiency declines, and moulding yields is low, process costs is very high.
Adopt traditional UV spraying coating process, aborning, due to fabrication process condition and processing technology environment control improper, easily there is the series of problems such as long-pending oil, pitted skin, particle, picture frame effect in product surface, polishing yield and a yield are low, cause poor, the fresh degree of reflecting of finished product case surface levelability lower, luster effect is undesirable.In addition, in prior art, the coating in UV when spraying is the coating of commercially available not diluted, conventionally the viscosity of coating is 20～30 seconds, because its viscosity is large, resistance during plastic rubber substrate spraying is also large, and coating is poor in the tack of substrate surface, cause the coating on plastic rubber substrate surface inhomogeneous, the phenomenons such as long-pending oil, pitted skin and picture frame effect easily occur, affect total quality and the appearance of product, yields is low.
Summary of the invention
The object of the invention is to provide for the deficiencies in the prior art a kind of effective solution plastic rubber substrate surface to produce long-pending oil, pitted skin, particle and picture frame effect, the high light coating process in surface of the plastic rubber substrate that yield and polishing yield are high.
For achieving the above object, the present invention adopts following technical scheme:
The high light coating process in surface that a kind of plastic rubber substrate is provided, it comprises the following steps:
A, clean, cleans the plastic rubber substrate of moulding, removes the pollutant that adheres on plastic rubber substrate surface;
B, surface preparation, send into plastic rubber substrate in the UV-irradiation region of UV-irradiation machine, with UV-irradiation plastic rubber substrate surface, changes the micel structure on plastic rubber substrate surface;
C, modulation coating add curing agent and mixing diluents modulation, to dilute the viscosity of coating in the host of coating;
D, surface spraying, be fixed on the plastic rubber substrate that completes surface preparation in spraying equipment, and the spray painting modulating, to plastic rubber substrate surface, is completed to the surface spraying of plastic rubber substrate;
E, standing, by standing 8～10 minutes of plastic rubber substrate after spraying, makes coating evenly be coated in plastic rubber substrate surface under normal temperature;
F, baking, put into roasting plant by the plastic rubber substrate after standing, and high-temperature baking makes paint solidification.
The present invention includes following further technical scheme.
Wherein, between step B and step C, also include step B1, fixedly lie on fixtures for painting and be transported to spraying equipment plastic rubber substrate is horizontal.
Wherein, in described step C, coating is by host: the ratio hybrid modulation of curing agent: diluent=8:1:4 is made, and the temperature of coating is 18～25 ℃.
Wherein, in described step C, the viscosity of coating is 8～11 seconds.
Wherein, described step D is specially, and the plastic rubber substrate that completes surface preparation is fixed in spraying equipment, the coating modulating is packed in spray gun, spray gun sprays coating to plastic rubber substrate surface, completes the surface spraying of plastic rubber substrate, and the pressure that spues of spray gun is 4～5kg/cm
2, it is 3～4kg/cm that spraying swath is pressed
2.
Wherein, in described step D, the spraying rate of spray gun is 800～1500mm/s, and the distance on spray gun and plastic rubber substrate surface is 12～17cm.
Preferably, the front spraying rate of described spray gun is 1200～1500mm/s, the side spraying rate of described spray gun is 800～1000mm/s, and the distance in described spray gun and plastic rubber substrate front is 15～17cm, and the distance of described spray gun and plastic rubber substrate side is 12～15cm.
Wherein, in described step D, the spraying method of spray gun is four sprayings, and the spray angle of described spray gun is 60～75 degree.
Wherein, in described step F, baking temperature is 70～80 ℃, and baking time is 60～120 minutes.
Wherein, in described step C, the space cleanliness factor of the working environment of modulation coating is not less than 100,000 grades; In described step D, the space cleanliness factor of the working environment of surface spraying is not less than 100,000 grades.
Beneficial effect of the present invention is: the high light coating process in surface of plastic rubber substrate of the present invention, comprises the following steps: A, clean, the plastic rubber substrate of moulding is cleaned, and remove the pollutant that adheres on plastic rubber substrate surface; B, surface preparation, send into plastic rubber substrate in the UV-irradiation region of UV-irradiation machine, with UV-irradiation plastic rubber substrate surface, changes the micel structure on plastic rubber substrate surface; C, modulation coating add curing agent and mixing diluents modulation, to dilute the viscosity of coating in the host of coating; D, surface spraying, be fixed on the plastic rubber substrate that completes surface preparation in spraying equipment, and the spray painting modulating, to plastic rubber substrate surface, is completed to the surface spraying of plastic rubber substrate; E, standing, by standing 8～10 minutes of plastic rubber substrate after spraying, makes coating evenly be coated in plastic rubber substrate surface under normal temperature; F, baking, put into roasting plant by the plastic rubber substrate after standing, and high-temperature baking makes paint solidification.The present invention, by controlled working process conditions, effectively reduces product surface and easily occurs the problems such as long-pending oil, pitted skin, particle, picture frame effect, and the coating of finished surface good leveling property, formation is evenly fine and close, surface-brightening, and polishing yield and a yield are high; In addition, the present invention on plastic rubber substrate surface, improves coating in the tack on plastic rubber substrate surface by the spray painting after dilution, guarantees that coating is even, and product percent of pass is high.
The specific embodiment
The high light coating process in surface of plastic rubber substrate, comprises the following steps:
A, clean, cleans the plastic rubber substrate of moulding, removes the pollutant that adheres on plastic rubber substrate surface; By the cleaning mode of washing, remove plastic rubber substrate surface and oil contaminant, dust etc. particularly and adhere to rubbish, to improve the surface spraying quality of plastic rubber substrate; Wherein, described plastic basis material is ABS, PC or ABS and PC mixed plastic base material.
B, surface preparation, send into plastic rubber substrate in the UV-irradiation region of UV-irradiation machine, with UV-irradiation plastic rubber substrate surface, changes the micel structure on plastic rubber substrate surface; With the transporting velocity of 0.8 m/min～6.5 m/min, carry plastic rubber substrate by described UV-irradiation region particularly, the ultraviolet energy value of UV-irradiation is 680 mj/cm
2～3400 mj/cm
2, working space environment temperature when UV-irradiation is carried out on plastic rubber substrate surface is no more than 100 ℃ so that plastic rubber substrate while carrying out UV-irradiation operation temperature distortion amount little.Adopt UV-irradiation can eliminate plastic rubber substrate surface internal stress, restructuring plastic rubber substrate surface molecular unity structure, thereby improve surface tension and the surface adhesion force of plastic rubber substrate, in spraying process, coating is good in plastic rubber substrate surface attachment, be difficult for to produce stress trace, easy to foaming coming off not, product surface quality is good.
Ultraviolet ray irradiation process, claim again UV ultraviolet curing process, utilize in UV ultraviolet light, shortwave (300-400 nanometer) is under UV radiation, light trigger irriate in liquid UV material becomes free radical or cation, thereby the macromolecular material (resin) causing containing active function groups aggregates into the process that not molten solid is filmed.
C, modulation coating add curing agent and mixing diluents modulation, to dilute the viscosity of coating in the host of coating; Coating is diluted to rational viscosity, and the resistance while reducing plastic rubber substrate spraying, improves coating in the tack of substrate surface, strengthens coating at the levelability on plastic rubber substrate surface, guarantees that the coating on plastic rubber substrate surface is even.
D, surface spraying, be fixed on the plastic rubber substrate that completes surface preparation in spraying equipment, and the spray painting modulating, to plastic rubber substrate surface, is completed to the surface spraying of plastic rubber substrate; Utilize spray gun by the abundant atomization of coating after dilution, guarantee that coating densification sprays equably on plastic rubber substrate surface, improve the tack of coating to plastic rubber substrate, and spray rate is fast, improve application process velocity, the single plastic rubber substrate external coating time is 15～30 seconds.Complete the plastic rubber substrate of surface preparation, with the distance interval of 4～8cm, be fixed on the fixture of spraying equipment, be convenient to spray gun a plurality of plastic rubber substrates are sprayed simultaneously, improve production and processing efficiency and guarantee plastic rubber substrate spraying evenly.Preferably, the spacing of plastic rubber substrate is 6cm, improves production and processing efficiency, reduces production costs.
E, standing, by standing 8～10 minutes of plastic rubber substrate after spraying, makes coating evenly be coated in plastic rubber substrate surface under normal temperature; Plastic rubber substrate surface is after UV-irradiation, improved the tack of coating on plastic rubber substrate surface, after spraying by plastic rubber substrate standing 8～10 minutes at normal temperatures, effectively avoid plastic rubber substrate surface to produce bubble, improve coating in levelability and the ductility on plastic rubber substrate surface, be conducive to coating and be adsorbed on better plastic rubber substrate surface and form uniform paint film, spraying effect is good.Preferably, in the standing district in spray room, exhaust apparatus is set, in time the coating cloud producing in spraying process is arranged, reduce granule dust and be trapped in spraying equipment, improve the space cleanliness factor of application processing.
F, baking, put into roasting plant by the plastic rubber substrate after standing, and high-temperature baking makes paint solidification, makes coating be attached to rapidly plastic rubber substrate surface, accelerates the dryness finalization of paint film, improves production and processing efficiency.
Plastic rubber substrate is after baking is processed, also can utilize the sand paper that meets the thin density requirements of frosted to polish the particle of plastic rubber substrate remained on surface, by frosted, process the external coating effect that improves plastic rubber substrate, then wax bar is wound on emery wheel the processing of waxing of plastic rubber substrate surface, further improves the surface gloss of plastic rubber substrate.
The present invention utilizes UV-irradiation plastic rubber substrate surface, eliminate plastic rubber substrate surface internal stress, restructuring plastic rubber substrate surface molecular unity structure, remove the static on plastic rubber substrate surface, thereby improve surface tension and the surface adhesion force of plastic rubber substrate, in spraying process, first coating is diluted, reduce the viscosity of coating, be conducive to the abundant atomization of coating, the resistance while reducing plastic rubber substrate spraying, thus be conducive to form uniform paint film on plastic rubber substrate surface, coating is good in plastic rubber substrate surface attachment, and product surface quality is good.
Wherein, between step B and step C, also include step B1, fixedly lie on fixtures for painting and be transported to spraying equipment plastic rubber substrate is horizontal.The horizontal placement of plastic rubber substrate, has reduced erecting highly of plastic rubber substrate, and the contact area of plastic rubber substrate and fixtures for painting is large, and good positioning effect in spraying process effectively avoids plastic rubber substrate that sideslip occurs in spraying process, and painting effect is good, and volume production feasibility is high.Wherein, fixtures for painting should spray paint and process the contaminating impurity plastic rubber substrates such as iron rust that prevent that chucking surface from producing before fixing plastic rubber substrate.
Wherein, in described step C, coating is by host: the ratio hybrid modulation of curing agent: diluent=8:1:4 is made, and the temperature of coating is 18～25 ℃.Wherein, host is PLANET PZ-II X12C LG25(P-109056); Curing agent is POLYHARD Z-50 (GZ); Diluent is PLANET THINNER #743 (#743 NO.2), utilizes the reflective characteristic of blacking self, is conducive to promote the glossiness on plastic rubber substrate surface.Certainly, the present invention also can adopt other coating, as long as it can meet the painting effect of Gao Guang.The temperature of coating is 18～25 ℃, guarantees that host, curing agent and diluent fully mix, and the densification of the coating of modulation is even, avoids producing particle, is conducive to improve painting effect.
Wherein, in described step C, the viscosity of coating is 8～11 seconds.Dope viscosity dilution is 8～11 seconds, has reduced the viscosity of coating, is conducive to the abundant atomization of coating, the resistance while reducing plastic rubber substrate spraying, thus be conducive to form uniform paint film on plastic rubber substrate surface, and paint film spontaneous curing speed is fast.
Wherein, described step D is specially, and the plastic rubber substrate that completes surface preparation is fixed in spraying equipment, the coating modulating is packed in spray gun, spray gun sprays coating to plastic rubber substrate surface, completes the surface spraying of plastic rubber substrate, and the pressure that spues of spray gun is 4～5kg/cm
2, it is 3～4kg/cm that spraying swath is pressed
2.Spuing of spray gun pressed and the excessive easy series of problems such as long-pending oil, pitted skin, picture frame effect that occur in plastic rubber substrate surface that cause of spraying swath pressure, spue and press and spraying swath is pressed and too smallly is unfavorable for the abundant atomization of coating and is unfavorable for that coating is stablized being attached to plastic rubber substrate surface, by the voltage-controlled 4～5kg/cm that is made as of spuing of spray gun
2, the voltage-controlled 3～4kg/cm that is made as of spraying swath
2, being conducive to the abundant atomization of coating, coating is good at the adhesion property on plastic rubber substrate surface, avoids producing the phenomenons such as long-pending oil, pitted skin and picture frame effect, and spraying effect is good.
Wherein, in described step D, the spraying rate of spray gun is 800～1500mm/s, and the distance on spray gun and plastic rubber substrate surface is 12～17cm.Spraying rate is faster, and the spray time of plastic rubber substrate is shorter, and spraying rate is 800～1500mm/s, guarantees plastic rubber substrate surface spraying evenly and shortens spray time, improves working (machining) efficiency; The distance on spray gun and plastic rubber substrate surface is too small, and the coating spraying from spray gun area coverage excessive to the surface impacts dynamics of plastic rubber substrate and the spraying that single sprays is little; When the distance on spray gun and plastic rubber substrate surface is excessive, the pressure that spues of coating is too small, is unfavorable for that coating is adsorbed on rapidly plastic rubber substrate surface; The distance on spray gun and plastic rubber substrate surface is 12～17cm, guarantees that the tack of coating is good, shortens spray process time and spraying effect good.
Preferably, the front spraying rate of described spray gun is 1200～1500mm/s, the side spraying rate of described spray gun is 800～1000mm/s, and the distance in described spray gun and plastic rubber substrate front is 15～17cm, and the distance of described spray gun and plastic rubber substrate side is 12～15cm.Guarantee that plastic rubber substrate coating tack positive and side is good, crudy is high.
Wherein, in described step D, the spraying method of spray gun is four sprayings, and the spray angle of described spray gun is 60～75 degree.Particularly, four sprayings are: spraying for the first time, and the spray gun spraying of turning left along plastic rubber substrate surface from the right side in the horizontal direction, sprays for the second time, after spray gun 90-degree rotation, the spraying of turning left along plastic rubber substrate surface from the right side at vertical direction spray gun, spraying for the third time, after spray gun Rotate 180 degree, at vertical direction spray gun, along plastic rubber substrate surface, spray from left to right, the 4th spraying, after spray gun 90-degree rotation, spray gun sprays from left to right along plastic rubber substrate surface in the horizontal direction.Coating after dilution is divided and is coated in plastic rubber substrate surface four times, avoid the uniformity of spraying to be subject to the impact of plastic rubber substrate surface configuration, especially for some, there is the 3 D workpiece of Complicated Spatial Structure, adopt repeatedly spraying, guarantee that plastic rubber substrate spraying effect is even.The spray angle of spray gun is 90 while spending, and coating vertically sprays to plastic rubber substrate surface, thereby causes that coating is shallow to be gone out or the plastic rubber substrate surface of rebounding out, easily occurs the bad painting effects such as pitted skin; Spray angle is 60～75 while spending, and guarantees that the coating of ejection can extend along the surface of plastic rubber substrate, has improved the levelability of coating, and painting effect is good, avoids producing pitted skin.
Wherein, in described step F, baking temperature is 70～80 ℃, and baking time is 60～120 minutes.Baking temperature is too high or baking time is long, wastes energy, and production efficiency is low, even can cause plastic rubber substrate surface to deform, baking temperature is too low or baking time is shorter insufficient to plastic rubber substrate surface treatment, is unfavorable for fully solidifying of coating, affects spraying effect.The present invention is controlled at 70～80 ℃ by the baking temperature of the plastic rubber substrate after spraying, and baking time is controlled at 60～120 minutes, guarantees the abundant dry solidification of coating, is conducive to coating and forms stable dope layer on plastic rubber substrate surface.
Wherein, in described step C, the space cleanliness factor of the working environment of modulation coating is not less than 100,000 grades; In described step D, the space cleanliness factor of the working environment of surface spraying is not less than 100,000 grades.Air purity is 100,000 grades, represents that in every cubic metre of (or every liter) air, 1-5um grit number is less than 2500.Guarantee the air cleaning of coating in modulated process, avoid the grit in working environment to fall into coating, thereby cause the ill effect of the plastic rubber substrate generation particle after spraying; In surface spraying process, space cleanliness factor is high, avoids the dust in the absorption of the coating after atomization working environment in coating process, and application yield is high.
Below in conjunction with embodiment, the present invention is further illustrated.
embodiment mono-.
Plastic rubber substrate to PC and ABS mixed materials cleans; Again plastic rubber substrate is sent into the UV-irradiation region of UV-irradiation machine, with UV-irradiation plastic rubber substrate surface; Then fixedly lie on fixtures for painting and be transported to spraying equipment plastic rubber substrate is horizontal; Meanwhile modulate coating, the viscosity that makes coating is 8 seconds, and the temperature of coating is 18 ℃; The coating modulating is packed in spray gun, spray gun by coating with the spray angle of 60 degree, minute spray for four times to plastic rubber substrate surface, it is 4kg/cm that the spuing of spray gun pressed
2, the spraying swath of spray gun is pressed as 3kg/cm
2, the front spraying rate of spray gun is 1200mm/s, and the side spraying rate of spray gun is 800mm/s, and the distance in spray gun and plastic rubber substrate front is 15cm, and the distance of spray gun and plastic rubber substrate side is 12cm; Under normal temperature by standing 8 minutes of plastic rubber substrate after spraying; At baking temperature, be 70 ℃, baking time is within 120 minutes, under condition, to toast plastic rubber substrate to make paint solidification, thereby completes the high light application in surface of plastic rubber substrate.
embodiment bis-.
Plastic rubber substrate to PC and ABS mixed materials cleans; Again plastic rubber substrate is sent into the UV-irradiation region of UV-irradiation machine, with UV-irradiation plastic rubber substrate surface; Then fixedly lie on fixtures for painting and be transported to spraying equipment plastic rubber substrate is horizontal; Meanwhile modulate coating, the viscosity that makes coating is 8.5 seconds, and the temperature of coating is 20 ℃; The coating modulating is packed in spray gun, spray gun by coating with the spray angle of 60 degree, minute spray for four times to plastic rubber substrate surface, it is 4.2kg/cm that the spuing of spray gun pressed
2, the spraying swath of spray gun is pressed as 3.2kg/cm
2, the front spraying rate of spray gun is 1250mm/s, and the side spraying rate of spray gun is 850mm/s, and the distance in spray gun and plastic rubber substrate front is 15cm, and the distance of spray gun and plastic rubber substrate side is 13cm; Under normal temperature by standing 8 minutes of plastic rubber substrate after spraying; At baking temperature, be 72 ℃, baking time is within 110 minutes, under condition, to toast plastic rubber substrate to make paint solidification, thereby completes the high light application in surface of plastic rubber substrate.
embodiment tri-.
Plastic rubber substrate to ABS material cleans; Again plastic rubber substrate is sent into the UV-irradiation region of UV-irradiation machine, with UV-irradiation plastic rubber substrate surface; Then fixedly lie on fixtures for painting and be transported to spraying equipment plastic rubber substrate is horizontal; Meanwhile modulate coating, the viscosity that makes coating is 9 seconds, and the temperature of coating is 21 ℃; The coating modulating is packed in spray gun, spray gun by coating with the spray angle of 70 degree, minute spray for four times to plastic rubber substrate surface, it is 4.4kg/cm that the spuing of spray gun pressed
2, the spraying swath of spray gun is pressed as 3.4kg/cm
2, the front spraying rate of spray gun is 1300mm/s, and the side spraying rate of spray gun is 900mm/s, and the distance in spray gun and plastic rubber substrate front is 16cm, and the distance of spray gun and plastic rubber substrate side is 13cm; Under normal temperature by standing 9 minutes of plastic rubber substrate after spraying; At baking temperature, be 74 ℃, baking time is within 100 minutes, under condition, to toast plastic rubber substrate to make paint solidification, thereby completes the high light application in surface of plastic rubber substrate.
embodiment tetra-.
Plastic rubber substrate to ABS material cleans; Again plastic rubber substrate is sent into the UV-irradiation region of UV-irradiation machine, with UV-irradiation plastic rubber substrate surface; Then fixedly lie on fixtures for painting and be transported to spraying equipment plastic rubber substrate is horizontal; Meanwhile modulate coating, the viscosity that makes coating is 9.5 seconds, and the temperature of coating is 22 ℃; The coating modulating is packed in spray gun, spray gun by coating with the spray angle of 70 degree, minute spray for four times to plastic rubber substrate surface, it is 4.6kg/cm that the spuing of spray gun pressed
2, the spraying swath of spray gun is pressed as 3.6kg/cm
2, the front spraying rate of spray gun is 1350mm/s, and the side spraying rate of spray gun is 900mm/s, and the distance in spray gun and plastic rubber substrate front is 16cm, and the distance of spray gun and plastic rubber substrate side is 14cm; Under normal temperature by standing 9 minutes of plastic rubber substrate after spraying; At baking temperature, be 76 ℃, baking time is within 90 minutes, under condition, to toast plastic rubber substrate to make paint solidification, thereby completes the high light application in surface of plastic rubber substrate.
embodiment five.
Plastic rubber substrate to PC material cleans; Again plastic rubber substrate is sent into the UV-irradiation region of UV-irradiation machine, with UV-irradiation plastic rubber substrate surface; Then fixedly lie on fixtures for painting and be transported to spraying equipment plastic rubber substrate is horizontal; Meanwhile modulate coating, the viscosity that makes coating is 10 seconds, and the temperature of coating is 23 ℃; The coating modulating is packed in spray gun, spray gun by coating with the spray angle of 75 degree, minute spray for four times to plastic rubber substrate surface, it is 4.8kg/cm that the spuing of spray gun pressed
2, the spraying swath of spray gun is pressed as 3.8kg/cm
2, the front spraying rate of spray gun is 1400mm/s, and the side spraying rate of spray gun is 950mm/s, and the distance in spray gun and plastic rubber substrate front is 17cm, and the distance of spray gun and plastic rubber substrate side is 14cm; Under normal temperature by standing 10 minutes of plastic rubber substrate after spraying; At baking temperature, be 78 ℃, baking time is within 80 minutes, under condition, to toast plastic rubber substrate to make paint solidification, thereby completes the high light application in surface of plastic rubber substrate.
embodiment six.
Plastic rubber substrate to PC material cleans; Again plastic rubber substrate is sent into the UV-irradiation region of UV-irradiation machine, with UV-irradiation plastic rubber substrate surface; Then fixedly lie on fixtures for painting and be transported to spraying equipment plastic rubber substrate is horizontal; Meanwhile modulate coating, the viscosity that makes coating is 10.5 seconds, and the temperature of coating is 25 ℃; The coating modulating is packed in spray gun, spray gun by coating with the spray angle of 75 degree, minute spray for four times to plastic rubber substrate surface, it is 5kg/cm that the spuing of spray gun pressed
2, the spraying swath of spray gun is pressed as 4kg/cm
2, the front spraying rate of spray gun is 1500mm/s, and the side spraying rate of spray gun is 1000mm/s, and the distance in spray gun and plastic rubber substrate front is 17cm, and the distance of spray gun and plastic rubber substrate side is 15cm; Under normal temperature by standing 10 minutes of plastic rubber substrate after spraying; At baking temperature, be 80 ℃, baking time is within 60 minutes, under condition, to toast plastic rubber substrate to make paint solidification, thereby completes the high light application in surface of plastic rubber substrate.
The above is only preferred embodiments of the present invention, and the equivalence of doing according to structure, feature and principle described in patent claim of the present invention therefore all changes or modifies, and is included in patent claim of the present invention.
Claims (3)
1. the high light coating process in the surface of plastic rubber substrate, is characterized in that: it comprises the following steps:
A, clean, cleans the plastic rubber substrate of moulding, removes the pollutant that adheres on plastic rubber substrate surface;
B, surface preparation, send into plastic rubber substrate in the UV-irradiation region of UV-irradiation machine, with UV-irradiation plastic rubber substrate surface, changes the micel structure on plastic rubber substrate surface;
C, modulation coating add curing agent and mixing diluents modulation, to dilute the viscosity of coating in the host of coating;
Wherein, coating is by host: the ratio hybrid modulation of curing agent: diluent=8:1:4 is made, and the temperature of coating is 18～25 ℃, and the viscosity of coating is 8～11 seconds;
Wherein, the space cleanliness factor of the working environment of modulation coating is not less than 100,000 grades;
D, surface spraying, be fixed on the plastic rubber substrate that completes surface preparation in spraying equipment, and the coating modulating is packed in spray gun, and spray gun to plastic rubber substrate surface, completes the surface spraying of plastic rubber substrate by spray painting, and the pressure that spues of spray gun is 4～5kg/cm
2, it is 3～4kg/cm that spraying swath is pressed
2, the spraying rate of spray gun is 800～1500mm/s, and the distance on spray gun and plastic rubber substrate surface is 12～17cm, and the spraying method of spray gun is four sprayings, and the spray angle of described spray gun is 60～75 degree;
Wherein, the space cleanliness factor of the working environment of surface spraying is not less than 100,000 grades;
E, standing, by standing 8～10 minutes of plastic rubber substrate after spraying, makes coating evenly be coated in plastic rubber substrate surface under normal temperature;
F, baking, put into roasting plant by the plastic rubber substrate after standing, and high-temperature baking makes paint solidification, and baking temperature is 70～80 ℃, and baking time is 60～120 minutes.
2. the high light coating process in the surface of a kind of plastic rubber substrate according to claim 1, is characterized in that: between step B and step C, also include step B1, fixedly lie on fixtures for painting and be transported to spraying equipment plastic rubber substrate is horizontal.
3. the high light coating process in the surface of a kind of plastic rubber substrate according to claim 1, it is characterized in that: the front spraying rate of described spray gun is 1200～1500mm/s, the side spraying rate of described spray gun is 800～1000mm/s, the distance in described spray gun and plastic rubber substrate front is 15～17cm, and the distance of described spray gun and plastic rubber substrate side is 12～15cm.
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| DE10103027A1 (en) * | 2001-01-24 | 2002-07-25 | Bayer Ag | Adhesion promoter, e.g. for improving adhesion of silicon-based protective coatings to polymeric substrates, comprising two-component polyurethane binder based on alkoxysilane-modified polyisocyanate |
| CN101235245B (en) * | 2008-02-02 | 2010-12-08 | 厦门大学 | Method for preparing silicone-acrylate dope |
| CN102029253B (en) * | 2010-10-30 | 2014-05-28 | 东莞广泽汽车饰件有限公司 | Surface treatment method of plastic substrate |
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