CN212603922U

CN212603922U - A UV transfer mold

Info

Publication number: CN212603922U
Application number: CN202021110456.0U
Authority: CN
Inventors: 易伟华; 张迅; 刘明礼; 侯大刚; 孙如; 成育凯
Original assignee: WG Tech Jiangxi Co Ltd
Current assignee: Jiangxi Woge Optoelectronics Group Co ltd
Priority date: 2020-06-16
Filing date: 2020-06-16
Publication date: 2021-02-26
Anticipated expiration: 2030-06-16

Abstract

The utility model belongs to the field of molds, and in particular relates to a UV transfer mold. The mold has light transmittance and is provided with a photochromic interlayer inside. The utility model designs a mould which adopts photochromic material to monitor the curing degree of UV transfer printing glue. When UV transfer is performed, the UV transfer adhesive is firstly dripped onto the mold, then covered with the resin film, and then the UV transfer adhesive is evenly coated between the mold and the resin film by a roller, and finally UV cured. In the process of UV curing, UV light is absorbed by the UV transfer adhesive through the resin film, and the UV transfer adhesive is gradually cured. When the UV transfer adhesive is fully cured, the excess ultraviolet light will be absorbed by the photochromic interlayer on the mold, causing the photochromic material in the photochromic interlayer to be excited and discolored. The production personnel can observe the photochromic color of the mold. The discoloration of the interlayer judges the curing degree of the UV transfer adhesive.

Description

UV rendition mould

Technical Field

The utility model belongs to the mould field especially relates to a UV rendition mould.

Background

The UV transfer printing glue is ultraviolet light curing glue, generally comprises active dilutable monomers, a photoinitiator, an acrylate prepolymer, an auxiliary agent and the like, is mainly formed on the surfaces of resin films such as PC, PET, TPU and the like through a mould, and has the excellent characteristics of convenience in use, high curing speed, high light transmittance, convenience in operation, environmental friendliness and the like.

The general flow of the UV transfer process is as follows: firstly, drip-irrigating the UV transfer printing glue onto a mould, then covering a resin film, uniformly coating the UV transfer printing glue between the mould and the resin film by using a rolling shaft, and finally carrying out UV curing to obtain a UV product embedded with the mould. At present, the UV transfer printing glue is mainly cured under the irradiation of a high-pressure mercury arc lamp and a high-pressure halogen lamp, but the heat release of the two lamp sources is serious in the using process, the energy fluctuation of the light sources is large, and the stability of mass production of UV products is not facilitated. Particularly, when the energy of the light source is too low, the UV transfer printing glue can be incompletely cured, the most obvious phenomenon is that irritant toxic gas is generated, the body health of production personnel is harmed, and meanwhile, the size of the surface texture of a UV product can be influenced and the yield of the product is reduced due to incomplete curing of the UV transfer printing glue; when the light source energy is too high, the resin film may bulge and wrinkle, even damage the transfer printing mold, and affect the production efficiency of the product. Therefore, how to monitor the curing degree of the UV transfer adhesive in the UV curing process so as to accurately control the irradiation energy of the UV light source is a technical problem to be solved in the field.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a UV rendition mould, the utility model provides a mould can monitor the solidification degree that UV rendition was glued in the UV curing process.

The utility model provides a UV rendition mould, UV rendition mould has the light transmissivity, and its inside is provided with the photochromism intermediate layer.

Preferably, the material of the photochromic interlayer is an organic photochromic material, an inorganic photochromic material or an organic-inorganic composite photochromic material.

Preferably, the thickness of the photochromic interlayer is 10-200 μm.

Preferably, the UV transfer mold includes a texture layer, a substrate layer, a photochromic interlayer and a protective layer, which are sequentially disposed.

Preferably, the UV transfer mold comprises a substrate layer, a photochromic interlayer and a protective layer, which are sequentially disposed, and the surface of the substrate layer has a texture.

Preferably, the UV transfer mold includes a texture layer, a photochromic interlayer, and a substrate layer, which are sequentially disposed.

Preferably, the protective layer is arranged on the surface of the base layer.

Preferably, the material of the substrate layer is glass, plastic or metal.

Preferably, the material of the texture layer is glass, plastic or metal.

Preferably, the material of the protective layer is polypropylene, polyvinyl chloride, polyethylene terephthalate or polyethylene.

Compared with the prior art, the utility model provides a UV rendition mould. The utility model provides a UV rendition mould has the light transmissivity, and its inside is provided with the photochromism intermediate layer. The utility model discloses not enough to the solidification technology existence is glued to present stage UV rendition, has designed an adoption photochromic material and has monitored the mould that UV rendition glued the solidification degree. When UV transfer printing is carried out, firstly, the UV transfer printing glue is dripped onto a mould, then a resin film is covered, then the UV transfer printing glue is uniformly coated between the mould and the resin film by using a rolling shaft, and finally, UV curing is carried out. During the process of UV curing, ultraviolet light passes through the resin film and is absorbed by the UV transfer glue, and a photoinitiator in the UV transfer glue is stimulated to be changed into free radicals or cations, so that small molecule monomers containing active functional groups, resin prepolymers and the like are initiated to be polymerized into insoluble and infusible high molecular compounds. If the UV transfer printing glue is completely cured, the redundant ultraviolet light is absorbed by the photochromic interlayer on the mold, and the photochromic material in the photochromic interlayer is excited to change color, so that a producer can judge the curing degree of the UV transfer printing glue by observing the color change condition of the photochromic interlayer of the mold. And after the UV curing is finished, the photochromic material in the photochromic interlayer of the mold is irradiated by visible light to recover the primary color, so that the mold can be repeatedly used. The utility model provides a UV rendition mould simple structure, convenient operation, the cost ratio is lower, can effectively monitor UV rendition and glue the solidification degree, improves UV product volume production stability to effectively solve the yield that causes in the UV curing process and hang down the problem of inefficiency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic diagram of a UV transfer mold according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a four-layer structure UV transfer printing mold according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of another four-layer structure UV transfer printing mold according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only 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.

Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of a UV transfer mold provided in an embodiment of the present invention, and fig. 2 is a schematic structural diagram of a UV transfer mold having a four-layer structure provided in an embodiment of the present invention; fig. 3 is a schematic structural diagram of another four-layer structure UV transfer printing mold according to an embodiment of the present invention. In the drawings, 1 denotes a UV transfer mold main body, 2 denotes a photochromic interlayer, 3 denotes a texture layer, 4 denotes a base layer, and 5 denotes a protective layer.

The utility model provides a UV rendition mould includes UV rendition mould main part 1 and photochromism intermediate layer 2. Wherein, the UV transfer printing mould main body 1 has light transmission; the photochromic interlayer 2 is arranged inside the UV transfer printing mould main body 1, and the arrangement area of the photochromic interlayer 2 corresponds to the area of the UV transfer printing glue coated on the surface of the UV transfer printing mould main body 1.

In one embodiment of the present invention, as shown in fig. 2, the UV transfer mold includes a texture layer 3, a substrate layer 4, a photochromic interlayer 2 and a protective layer 5, which are sequentially disposed. In another embodiment of the present invention, the texture layer 3 and the substrate layer 4 in the UV transfer mold are an integrated structure, that is, the UV transfer mold includes the substrate layer 4, the photochromic interlayer 2 and the protective layer 5, which are sequentially disposed, and the surface of the substrate layer 4 has a texture. In other embodiments provided by the present invention, as shown in fig. 3, the UV transfer mold includes a texture layer 3, a photochromic interlayer 2, and a substrate layer 4, which are sequentially disposed, and preferably further includes a protective layer 5 disposed on the surface of the substrate layer 4.

The utility model discloses in, contain photochromic material in the photochromic intermediate layer 2, can absorb the unnecessary ultraviolet ray that pierces through the gluey UV rendition for the solidification degree that the gluey UV rendition of monitoring UV rendition. The present invention is directed to a photochromic interlayer 2, which contains photochromic materials without any particular limitation, including but not limited to organic photochromic materials and/or inorganic photochromic materials, specifically can be photochromic polymers containing thiocarzone complex structure, photochromic polymers containing azobenzene structure, photochromic polymers containing spirobenzopyran structure, and photochromic polymers of redox type, and the photochromic polymers of redox type can be photochromic polymers of bipyridine salt structure, thionine structure or thiazine structure. The utility model discloses in, there is not particular limitation to the thickness of photochromism intermediate layer 2, and the technical personnel in the field can select according to actual need, and its thickness can satisfy the requirement that is used for monitoring UV rendition glue curing degree can. In one embodiment of the present invention, the thickness of the photochromic interlayer 2 is 10 to 200 μm, preferably 30 to 100 μm.

The utility model discloses in, the texture layer 3 of independent setting and the 4 surface textures of stratum basale of integration are used for gluing the contact with the UV rendition, make the UV rendition glue its surface can form corresponding texture after the solidification. In the present invention, the texture of the texture layer 3 and the integrated substrate layer 4 is not particularly limited, and those skilled in the art can select the texture according to the actual requirement, including but not limited to glass, plastic or metal with good light transmittance, and specifically can be made of silicon, quartz, silicon nitride, diamond, Polydimethylsiloxane (PDMS), polymethyl methacrylate (PMMA), hydroxyl-terminated polydimethylsiloxane (h-PDMS), polyurethane acrylate (PUA), polyvinyl alcohol (PVA), polyvinyl chloride (PVC), Polytetrafluoroethylene (PTFE), ethylene-tetrafluoroethylene copolymer (ETFE), and other polymer materials. The utility model discloses in, there is not special limitation to the thickness of the 4 surface textures of stratum basale of texture layer 3 and integration, and suitable thickness can be selected according to the luminousness of different texture materials to the technical staff in the field, can guarantee UV shines the light permeable can. In one embodiment of the present invention, the thickness of the texture layer 3 is 10nm to 200 μm, preferably 50nm to 100 μm.

The utility model discloses in, stratum basale 4 is the major part of mould, the utility model discloses do not have special limitation to the material of stratum basale 4, and the skilled person in the art can select according to the actual demand, include but not limited to glass, plastics or metal that have good light transmissivity, specifically can be made by polymer materials such as silicon, quartzy, silicon nitride, diamond and PDMS, PMMA, h-PDMS, PUA, PVA, PVC, PTFE, ETFE. The utility model discloses in, there is not special limitation to the thickness of stratum basale 4, and suitable thickness can be selected according to the luminousness of different substrate materials to the technical staff in the field, can guarantee that UV shines the light permeable can. In an embodiment of the present invention, the thickness of the substrate layer 4 is not less than 0.1mm, for example, 0.1-10 mm, such as 0.2-5 mm, and such as 0.3-0.7 mm.

The utility model discloses in, protective layer 5 is used for protecting the mould bottom, generally adopts the higher material of hardness. In the present invention, the material of the protective layer 5 is not particularly limited, and those skilled in the art can select the material according to actual requirements, including but not limited to polypropylene (PP), polyvinyl chloride (PVC), polyethylene terephthalate (PET), Polyethylene (PE), etc. having good light transmittance. The utility model discloses in, do not have the special limitation to the thickness of protective layer 5, the suitable thickness can be selected according to different protective material's luminousness to the technical personnel in the field, can guarantee not influence the photochromic circumstances of observing photochromic material can. In one embodiment of the present invention, the thickness of the protective layer 5 is 20 to 100 μm, preferably 50 to 80 μm.

The utility model discloses not enough to the solidification technology existence is glued to present stage UV rendition, has designed an adoption photochromic material and has monitored the mould that UV rendition glued the solidification degree. When UV transfer printing is carried out, firstly, the UV transfer printing glue is dripped onto a mould, then a resin film is covered, then the UV transfer printing glue is uniformly coated between the mould and the resin film by using a rolling shaft, and finally, UV curing is carried out. During the process of UV curing, ultraviolet light passes through the resin film and is absorbed by the UV transfer glue, and a photoinitiator in the UV transfer glue is stimulated to be changed into free radicals or cations, so that small molecule monomers containing active functional groups, resin prepolymers and the like are initiated to be polymerized into insoluble and infusible high molecular compounds. If the UV transfer printing glue is completely cured, the redundant ultraviolet light is absorbed by the photochromic interlayer on the mold, and the photochromic material in the photochromic interlayer is excited to change color, so that a producer can judge the curing degree of the UV transfer printing glue by observing the color change condition of the photochromic interlayer of the mold. And after the UV curing is finished, the photochromic material in the photochromic interlayer of the mold is irradiated by visible light to recover the primary color, so that the mold can be repeatedly used.

The utility model provides a UV rendition mould simple structure, convenient operation, the cost ratio is lower, can effectively monitor UV rendition and glue the solidification degree, improves UV product volume production stability to effectively solve the yield that causes in the UV curing process and hang down the problem of inefficiency.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The UV transfer printing mold is characterized by having light transmission and a photochromic interlayer arranged inside the UV transfer printing mold.

2. The UV transfer mold according to claim 1, wherein a material of the photochromic interlayer is an organic photochromic material, an inorganic photochromic material, or an organic-inorganic composite photochromic material.

3. The UV transfer mold according to claim 1, wherein the photochromic interlayer has a thickness of 10 to 200 μm.

4. The UV transfer mold according to claim 1, wherein the UV transfer mold comprises a texture layer, a substrate layer, a photochromic interlayer and a protective layer, which are sequentially disposed.

5. The UV transfer mold according to claim 1, wherein the UV transfer mold comprises a base layer, a photochromic interlayer and a protective layer, which are sequentially disposed, and a surface of the base layer has a texture.

6. The UV transfer mold according to claim 1, wherein the UV transfer mold comprises a texture layer, a photochromic interlayer and a substrate layer, which are sequentially disposed.

7. The UV transfer mold according to claim 6, further comprising a protective layer disposed on a surface of the base layer.

8. The UV transfer mold according to any one of claims 4 to 7, wherein the material of the substrate layer is glass, plastic or metal.

9. The UV transfer mold of claim 4, 6 or 7, wherein the material of the texture layer is glass, plastic or metal.

10. The UV transfer mold according to claim 4, 5 or 7, wherein the material of the protective layer is polypropylene, polyvinyl chloride, polyethylene terephthalate or polyethylene.