CN217069510U - Post-curing device for preventing UV curing oxygen inhibition - Google Patents
Post-curing device for preventing UV curing oxygen inhibition Download PDFInfo
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- CN217069510U CN217069510U CN202123224766.2U CN202123224766U CN217069510U CN 217069510 U CN217069510 U CN 217069510U CN 202123224766 U CN202123224766 U CN 202123224766U CN 217069510 U CN217069510 U CN 217069510U
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Abstract
The device comprises a conveying mechanism, a first UV-LED light source, a spraying device, a second UV-LED light source, a first UV-LED light source, a second UV-LED light source and a second UV-LED light source, wherein the conveying mechanism supports and conveys a part to be cured in the conveying direction, the first UV-LED light source is positioned above the conveying mechanism and faces the part to be cured, the part to be cured is irradiated by the first UV-LED light source for the first curing, the spraying device is positioned above the conveying mechanism and is positioned at the downstream of the first UV-LED light source in the conveying direction, the spraying device sprays strippable coating agent on the part to be cured to form a strippable glue layer, the second UV-LED light source is positioned above the conveying mechanism and is positioned at the downstream of the spraying device in the conveying direction, the second UV-LED light source faces the part to be cured, and the part to be cured is irradiated by the second UV-LED light source for the second curing.
Description
Technical Field
The utility model belongs to the technical field of the UV solidification, especially, relate to a prevent post-curing device that UV solidification oxygen hinders and gathers.
Background
The UV curing technology is characterized in that ultraviolet rays are used for irradiating a photoinitiator to generate free radicals to initiate acrylic monomer prepolymers and the like to perform crosslinking curing, and the technology has the advantages of high curing speed, no solvent and the like and is environment-friendly. But since free radicals are easily captured by oxygen molecules in air; the free radical cure is hindered by the following mechanism; triplet O2 in its ground state may act as a quencher reacting with the photoactivated initiator to form a complex, thereby quenching the triplet excited photoinitiator. The oxygen inhibition phenomenon causes the problems of incomplete curing of the coating surface, low surface strength, sticky surface, poor wear resistance and the like.
The problem of oxygen inhibition is solved by starting from materials, and initially using a tertiary amine co-initiator (hydrogen donor) to provide hydrogen atoms on adjacent carbon and adjacent to adjacent nitrogen under a hydrogen abstraction type initiator to form a stable alkyl free radical which shares pi electrons with a nitrogen lone pair orbit; it reacts with peroxy radicals to form hydroperoxides and newly formed aminoalkyl radicals can reinitiate polymerization of acrylate monomers, while aminoalkyl radicals can form aminoalkyl peroxy radicals with oxygen molecules to consume oxygen, reducing the oxygen content of the system, both forming a synergistic effect. But the amine substance has the problems of system yellowing and storage stability.
In recent years, mercaptan series products are proposed in the industry, the mercapto group hydrogen-capturing capability of mercaptan is particularly strong, and when Clarmer et al researches UV cured acrylate and mercapto resin systems by adopting a real-time infrared technology, the conversion rate of acrylate is approximately twice of that of mercapto. This means that the kinetic rate constant of acrylate chain growth is about 1.5 times the rate of mercapto hydrogen grab, and the advantage of mercapto polymerization is more pronounced in the presence of air. However, the odor and storage stability of thiols have limited their wide spread and use.
Recently, in the field of 3D printing, it has been reported that a chemical method such as phenolic resin is used to treat the surface to compensate for the incomplete UV curing, in which first, absolute ethanol and phenolic resin are used to treat raw sand to form precoated sand, then a dissolving agent is sprayed during printing to dissolve and bond the phenolic resin on the outer layer of the precoated sand, so as to form the precoated sand, and finally, the formed workpiece is heated to perform secondary curing. According to the method, the chemical reagent is sprayed by a chemical method, and the baking post-treatment is carried out after the spraying, so that the working procedures are multiple and energy is consumed, and most importantly, the texture of the surface is covered, and the surface precision of the 3D printing is covered.
There have been many reports of solutions in equipment technology such as inhibition of oxygen inhibition during UV curing by physical methods, the earliest and most widespread strategy to prevent oxygen diffusion into the polymerization system being inert atmosphere protection (nitrogen, helium, carbon dioxide), under which UV curing can take place with an order of magnitude lower photoinitiator concentration and better cured coatings are obtained. However, the physical method is not suitable for continuous coating lines on an industrial scale and can be used only in fields of small people, high cost and small range. Curing in 3D printing is carried out on the same machine equipment for a certain time of sealed underwater secondary exposure curing post-treatment, and heating and ultrasonic cleaning heat treatment are carried out; the defects are that the application field is limited, the precision parts have the problems of cracks and the like, and in secondary liquid curing, an aqueous phase system has no initiator and the possible secondary curing degree is not enough.
The above information disclosed in the background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is well known to those of ordinary skill in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a prevent post-curing device that UV solidification oxygen hinders and gathers overcomes the not enough and limited problem of application area that current oxygen hinders and gathers. In order to achieve the above object, the present invention provides the following technical solutions:
the utility model discloses a prevent post-curing device that UV solidification oxygen hinders and gathers includes:
a conveying mechanism which supports and conveys the member to be cured toward a conveying direction,
a first UV-LED light source which is positioned above the conveying mechanism and faces the part to be cured, wherein the part to be cured is irradiated by the first UV-LED light source for the first curing to form a UV coating,
a spray coating device positioned above the conveying mechanism and downstream of the first UV-LED light source in the conveying direction, the spray coating device spraying a peelable coating formulation onto the part to be cured to form a peelable glue layer,
a second UV-LED light source located above the conveying mechanism and downstream of the spray coating device in the conveying direction, the second UV-LED light source facing the member to be cured, the member to be cured irradiating a second curing via the second UV-LED light source.
In the post-curing device for preventing UV curing oxygen inhibition, a dryer is arranged between the spraying device and the second UV-LED light source.
In the post-curing device for preventing UV curing oxygen inhibition, the dryer includes an infrared drying device.
In the post-curing device for preventing UV curing oxygen inhibition, the conveying mechanism includes a conveyor belt.
In the post-curing device for preventing oxygen inhibition during UV curing, the wavelength of the first UV-LED light source or the second UV-LED light source comprises one or more combined light sources of 365nm, 385nm,395nm and 405 nm.
In the post-curing device for preventing UV curing oxygen inhibition, the arrangement mode of the first UV-LED light source or the second UV-LED light source comprises a continuous linear shape, an interval linear shape or a combined surface shape.
In the post-curing device for preventing oxygen inhibition during UV curing, the UV-LED light source can rotatably surround the conveying mechanism.
In the post-curing device for preventing oxygen inhibition during UV curing, the first UV-LED light source or the second UV-LED light source reciprocates relative to the part to be cured.
In the post-curing device for preventing oxygen inhibition during UV curing, the first UV-LED light source or the second UV-LED light source is provided with a power regulator.
In the post-curing device for preventing UV curing oxygen inhibition, the first UV-LED light source or the second UV-LED light source is a handheld light source.
In the technical scheme, the utility model provides a pair of prevent post-curing device that UV solidification oxygen hinders and gathers has following beneficial effect: the utility model discloses need not add tertiary amine, the raw materials of unstable easy yellow stain such as mercaptan can realize the surface and solidify completely, solve the oxygen and hinder the problem of gathering, can serialization construction operation on a large scale, the unsuitable industrial scale's of UV solidification continuous coating line under the inert atmosphere protection has been overcome, only can be used for the xiaozhong, and is with high costs, the field of small circle, can be applicable to on the material on complex structure surface, through strippable glue film, can carry out secondary postcure at the uneven surface material of complicacy, can't realize laminating completely on complex structure surface to the film and be used for separating oxygen absolutely. The utility model discloses an use spraying to drench the technology of scribbling and can realize secondary postcure at complicated structure, rugged UV material surface covering.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.
FIG. 1 is a schematic structural view of an embodiment of a post-cure device for preventing UV curing oxygen inhibition of the present invention;
fig. 2 is a schematic structural diagram of an embodiment of the post-curing device for preventing UV curing oxygen inhibition of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are described in detail and completely, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention provided in the accompanying fig. 1-2 is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In order to make those skilled in the art better understand the technical solution of the present invention, the post-curing device for preventing UV curing oxygen inhibition includes,
a conveying mechanism 1 which supports and conveys the member to be cured 5 in a conveying direction,
a first UV-LED light source 2 which is positioned above the conveying mechanism 1 and faces the part to be cured 5, the part to be cured 5 is irradiated by the first UV-LED light source 2 for the first curing to form a UV coating 7,
a spraying device 3 which is positioned above the conveying mechanism 1 and is positioned at the downstream of the first UV-LED light source 2 in the conveying direction, the spraying device 3 sprays strippable coating preparation on the part to be cured 5 to form a strippable glue layer 6,
a second UV-LED light source 4 located above the conveying mechanism 1 and downstream of the spraying device 3 in the conveying direction, the second UV-LED light source 4 facing the member to be cured 5, the member to be cured 5 being irradiated with light via the second UV-LED light source 4 for a second curing.
The utility model discloses utilize strippable coating technique to realize the complete solidification in surface in the isolated oxygen inhibition of UV-LED light source postcure field. And after the UV coating is coated on the surface of the base material, carrying out first exposure curing, then spraying the curtain coating strippable coating on the surface of the coating, and then carrying out second UV-LED light source exposure curing. The technology is flexible in construction, can be constructed on site, and is also suitable for curing technology in the field of UV-LED light sources for large-scale construction. Compared with the material for overcoming oxygen inhibition, the material for oxygen inhibition such as active amine, mercaptan and the like has great influence on the storage stability of the system, and the active amine and the like cause yellowing of the coating after illumination and are also unfavorable for the water resistance of the coating. The same equipment such as inert gas such as nitrogen is introduced, the nitrogen atmosphere needs to be continuously introduced, the size of the coating piece is influenced by the volume of the cavity, and the biggest problem is that the assembly line type production process is difficult to realize. The post-curing technology of the strippable coating covered on the surface of the coating has no influence on the size of a cured part and can be continuously constructed in a large scale. Compared with the post-curing technology of covering a transparent film to isolate oxygen, the coating surface is sprayed with the curtain coating strippable paint, so that the characteristics of complete contact with the coating surface, no bubbles and no gaps can be basically realized, more importantly, the spray coating strippable paint can realize complete covering on irregular surfaces, and the post-curing technology of completely covering a three-dimensional complex surface is difficult to realize by covering the transparent film.
In the preferred embodiment of the post-curing device for preventing the UV curing oxygen inhibition, a dryer 8 is arranged between the spraying device 3 and the second UV-LED light source 4.
In the preferred embodiment of the post-curing device for preventing UV curing oxygen inhibition, the dryer 8 includes an infrared drying device.
In the preferred embodiment of the post-curing device for preventing UV curing oxygen inhibition, the conveying mechanism 1 comprises a conveyor belt.
In the preferred embodiment of the post-curing device for preventing UV curing oxygen inhibition, the wavelength of the first UV-LED light source 2 or the second UV-LED light source 4 comprises one or more combined light sources of 365nm, 385nm,395nm and 405 nm.
In the preferred embodiment of the post-curing device for preventing oxygen inhibition during UV curing, the arrangement of the first UV-LED light source 2 or the second UV-LED light source 4 includes a continuous line shape, a spaced line shape or a combined plane shape.
In the preferred embodiment of the post-curing device for preventing UV curing oxygen inhibition, the UV-LED light source is rotatably wound around the transfer mechanism 1.
In the preferred embodiment of the post-curing device for preventing oxygen inhibition in UV curing, the first UV-LED light source 2 or the second UV-LED light source 4 reciprocates relative to the member to be cured 5.
In the preferred embodiment of the post-curing device for preventing UV curing oxygen inhibition, the first UV-LED light source 2 or the second UV-LED light source 4 is provided with a power regulator.
In the preferred embodiment of the post-curing device for preventing UV curing oxygen inhibition, the first UV-LED light source 2 or the second UV-LED light source 4 is a hand-held light source.
In one embodiment, the UV-LED light source has a light source wavelength including, but not limited to, 365nm, 385nm,395nm,405nm, and is energy tunable. The arrangement mode of the point light sources can be linear, interval linear and combined surface shape.
In one embodiment, a conveyor belt construction mode is adopted, the linear speed is 0-10 m/s, and the cured product is UV wood paint, UV plastic paint, UV ink or various UV coating materials; for operation at the construction site, a two-shot post cure of the light source covered peelable coating of the handheld UV-LED light source is preferred, including but not limited to the two application scenarios described above.
Example 1
Factory construction
The wooden floor coated with the UV finish (UV Coating top1 Shanghai Jun color science and technology brand) (outermost layer) is placed at the exposure position of a first UV-LED light source 2 of a conveyor belt, the energy of a 405nm light source of the first UV-LED light source 2 is adjusted to be 800mJ/cm2 (the speed of the 800mW/cm2 conveyor belt is about 1m/s), a conveying mechanism 1 such as the conveyor belt is started, when a substrate reaches the position under a spraying device 3 or a shower Coating device, the spraying device 3/the shower Coating device is started to coat the water-based strippable Coating, the water-based PUD brand W001 Shanghai Jun color science and technology brand of PEG/PPG type is used, the power of a dryer 8 such as infrared rays is adjusted to be 2-3 KW, the surface temperature of the substrate is enabled to be less than 80 ℃, and the wooden floor covered with the strippable Coating enters a second exposure area to be exposed after a solvent is removed through infrared heating. As shown in figure 1. The experimental result shows that after the UV coating covered by the strippable coating is exposed for the second time, the UV coating is scraped and scraped by a one-yuan coin with the force of inclining for 45 degrees and the force of about 3-5 KG without obvious scratches. Comparative example one-yuan coin draw scratch after two exposures of a UV coating covered with no strippable coating indicated significant scratching.
Example 2
On-site construction
After a UV finishing coat (such as UV Coating top2 Shanghai Jun color science and technology brand) is roll-coated on a base material such as a decorative wall, a first UV-LED light source 2 at the outermost layer is exposed and cured with the energy of 800mJ/cm2/405nm by a handheld light source, the surface is basically dried, a spraying device 3 is used for spraying a water-soluble wiping type strippable Coating, the thickness of the strippable Coating is controlled to be about 200 mu m, then a second UV-LED light source 4 is exposed, and the surface strippable Coating is wiped by a dry rag after exposure. See fig. 2; the coating has no obvious scratch; comparative example a second exposure of the spray-free water-soluble scratch-off strippable coating the coating was scratched visibly with a fingernail.
Finally, it should be noted that: the embodiments described are only a part of the embodiments of the present application, and not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments in the present application belong to the protection scope of the present application.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.
Claims (10)
1. A post-curing device for preventing UV curing oxygen inhibition is characterized by comprising,
a conveying mechanism which supports and conveys the member to be cured toward a conveying direction,
a first UV-LED light source which is positioned above the conveying mechanism and faces the part to be cured, wherein the part to be cured is irradiated by the first UV-LED light source for the first curing to form a UV coating,
a spray coating device positioned above the conveying mechanism and downstream of the first UV-LED light source in the conveying direction, the spray coating device spraying a peelable coating formulation onto the part to be cured to form a peelable glue layer,
a second UV-LED light source located above the conveying mechanism and downstream of the spray coating device in the conveying direction, the second UV-LED light source facing the member to be cured, the member to be cured irradiating a second curing via the second UV-LED light source.
2. The post-cure device for preventing oxygen inhibition of UV curing as set forth in claim 1, wherein a dryer is provided between said spray coating device and said second UV-LED light source.
3. The post-cure apparatus for preventing UV curing oxygen inhibition according to claim 2, wherein said dryer comprises an infrared drying device.
4. The post-cure apparatus for preventing UV curing oxygen inhibition according to claim 1, wherein said conveying mechanism comprises a conveyor belt.
5. The post-cure device for preventing oxygen inhibition of UV curing as set forth in claim 1, wherein the wavelength of the first UV-LED light source or the second UV-LED light source includes one or more of 365nm, 385nm,395nm and 405nm combined light source.
6. The post-curing device for preventing oxygen inhibition of UV curing as set forth in claim 1, wherein the light source arrangement of the first UV-LED light source or the second UV-LED light source comprises a continuous line shape, a spaced line shape or a combined plane shape.
7. The post-cure apparatus for preventing UV curing oxygen inhibition according to claim 1, wherein said UV-LED light source rotatably surrounds said conveyor mechanism.
8. The post-cure device for preventing oxygen inhibition of UV curing as set forth in claim 1, wherein the first UV-LED light source or the second UV-LED light source reciprocates relative to the member to be cured.
9. The post-cure device for preventing UV curing oxygen inhibition according to claim 1, wherein the first UV-LED light source or the second UV-LED light source has a power regulator.
10. The post-cure device for preventing UV curing oxygen inhibition according to claim 1, wherein the first UV-LED light source or the second UV-LED light source is a hand-held light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123224766.2U CN217069510U (en) | 2021-12-21 | 2021-12-21 | Post-curing device for preventing UV curing oxygen inhibition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123224766.2U CN217069510U (en) | 2021-12-21 | 2021-12-21 | Post-curing device for preventing UV curing oxygen inhibition |
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| Publication Number | Publication Date |
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| CN217069510U true CN217069510U (en) | 2022-07-29 |
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| CN202123224766.2U Active CN217069510U (en) | 2021-12-21 | 2021-12-21 | Post-curing device for preventing UV curing oxygen inhibition |
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Effective date of registration: 20230523 Address after: 201306 building C, No. 888, Huanhu West 2nd Road, Lingang New District, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai Patentee after: Shanghai Re Shi High tech Materials Co.,Ltd. Address before: 202150 room 8043, No. 399, Dongfeng highway, Dongping Town, Chongming District, Shanghai (Dongping Town Economic Development Zone) Patentee before: Shanghai Juncai Material Technology Co.,Ltd. |
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