CN216941859U - Splicing type optical structure flexible mold - Google Patents
Splicing type optical structure flexible mold Download PDFInfo
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- CN216941859U CN216941859U CN202220211792.7U CN202220211792U CN216941859U CN 216941859 U CN216941859 U CN 216941859U CN 202220211792 U CN202220211792 U CN 202220211792U CN 216941859 U CN216941859 U CN 216941859U
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Abstract
The utility model discloses a splicing type optical structure soft die which comprises at least two substrate layers to be spliced, wherein an optical structure layer is arranged on the upper surface of each welding seam substrate layer, two opposite structure edges of the substrate layers are respectively a first welding edge and a second welding edge, and a welding seam can be formed between the first welding edge of any one substrate layer and the second welding edge of the other substrate layer; laser adhesive tapes matched with the fiber laser for use are uniformly arranged between the first welding edge and the second welding edge of the welding seam; the laser adhesive tape comprises an adhesive tape base layer arranged along the lower surfaces of the first welding edge and the second welding edge, and coating adhesive layers facing the welding gap are uniformly distributed on the upper surface of the adhesive tape base layer. The utility model can effectively improve the strength and stability of the welding seam and improve the yield of products.
Description
Technical Field
The utility model relates to the technical field of optical film processing, in particular to a splicing type optical structure flexible mold.
Background
The laser is emitted by the transition of atoms at a high energy level to a low energy level under the excitation of external photons, is radiation-induced light, has high brightness, high directivity and high monochromaticity, is widely applied to various fields, and the plastic film laser welding technology is an excellent method applied to the field of plastic film welding.
The superstructure of multilayer optical structure laminating membrane generally is formed by the pressfitting of optical structure membrane soft mould via UV soft membrane glue, the material of soft membrane is the macromolecular polymer mostly, optical structure membrane soft mould is generally through sticky tape, it forms to electroplate sticky tape extrusion concatenation, often need two sides about pasting, and the soft membrane utensil of concatenation from this often the splice strength is lower, the concatenation time is longer, easy fracture in impression production, stability is lower, the connection segment difference on welding edge is great simultaneously, cause the controllable clearance of impression to enlarge, influence the product yield.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above disadvantages, the present invention provides a flexible mold with a splicing type optical structure, which can effectively improve the strength and stability of a welding seam, improve the drawing force of a welding edge, reduce the connection section difference of the welding edge, and improve the yield.
In order to achieve the above purposes, the utility model adopts the technical scheme that: the utility model provides a concatenation formula optical structure flexible mould which characterized in that: the optical structure comprises at least two substrate layers to be spliced, wherein an optical structure layer is arranged on the upper surface of each substrate layer, two structure edges opposite to each other of the substrate layers are respectively a first welding edge and a second welding edge, and a welding gap can be formed between the first welding edge of any one substrate layer and the second welding edge of the other substrate layer; laser adhesive tapes matched with the fiber laser for use are uniformly arranged between the first welding edge and the second welding edge of the welding seam; the laser adhesive tape comprises an adhesive tape base layer arranged along the lower surfaces of the first welding edge and the second welding edge, and coating adhesive layers facing the welding gap are uniformly distributed on the upper surface of the adhesive tape base layer.
The utility model has the beneficial effects that: through the cooperation of fiber laser and laser sticky tape can carry out laser welding to the first welding border, the second welding border that are located welding seam department, and then promote welding seam's intensity and stability. In the laser adhesive tape, the coating adhesive layer is arranged on the upper surface of the adhesive tape base layer, so that a near-infrared laser beam emitted by the optical fiber laser can irradiate the coating adhesive layer, and then high polymer at the first welding edge and the second welding edge at two sides of the splicing gap can be melted and expanded to form chain entanglement, thereby fully filling the welding gap and forming tight welding.
Further, the upper surfaces of the first welding edge and the second welding edge at the welding seam define an incidence surface for incidence of the near-infrared laser beam; the near-infrared laser beam emitted by the optical fiber laser can irradiate the coating bonding layer along the incident surface.
Further, the width of the near-infrared laser beam emitted by the fiber laser is between 1 and 50mm, and the wavelength is between 800 and 1100 nm.
Further, the coating of the adhesive layer includes a near infrared ray absorption coating layer and an epoxy adhesive coated on the tape base layer.
When a near-infrared laser beam emitted by the optical fiber laser irradiates the coating adhesive layer along the incident surface, the near-infrared absorption coating on the coating adhesive layer can instantly absorb the light energy of the near-infrared laser and convert the light energy into heat energy, and the high molecular polymer of the base material layer at the first welding edge and the second welding edge is melted and infiltrated into the welding gap through heat conduction, so that the high molecular polymer molecular chains at the first welding edge and the second welding edge are expanded to form chain entanglement, thereby uniformly filling the welding gap and enabling the welding gap to be tightly welded.
Further, the thickness of the base material layer is 50-300 μm, the thickness of the tape base layer is 25-125 μm, and the thickness of the coating adhesive layer is 5-30 μm.
Further, the optical structure layer is formed by curing acrylic resin through UV imprint, and the refractive index of the optical structure layer is between 1.48 and 1.64.
Further, the optical structure layer is one of a micro-lens structure layer, a micro-concave mirror structure layer, a prism structure layer and a diffusion structure layer.
Further, when the optical structure layer adopts a micro-lens structure layer or a micro-concave lens structure layer, the optical structure layer comprises a plurality of hemispherical or quasi-hemispherical lens grooves distributed on the substrate layer in an array manner, the diagonal length of the lens grooves is 20-45 μm, and the height of the structural top point of each lens groove is 1/4-1/2 of the diagonal length of the lens groove.
Further, when the optical structure layer adopts a prism structure layer, the optical structure layer comprises a plurality of prisms uniformly distributed on the substrate layer, the cross sections of the prisms are triangular, the height of each prism is 5-50 μm, and the vertex angle is 80-110 degrees.
Further, when the optical structure layer adopts a diffusion structure layer, the optical structure layer is formed by embossing a plurality of rugged microstructures, and the haze of the optical structure layer is 50-99%.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a partial enlarged view of portion A of FIG. 1;
FIG. 3 is a schematic structural diagram of an optical structure layer being a microlens structure layer according to an embodiment of the utility model;
fig. 4 is a schematic structural diagram of an optical structure layer being a prism structure layer according to an embodiment of the utility model.
In the figure:
1-a substrate layer; 11-a first welding edge; 12-a second welding edge; 2-fiber laser; 3-laser adhesive tape; 31-a tape base layer; 32-coating an adhesive layer; 41-lens groove; 42-a prism; 43-microstructure.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the utility model easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the utility model.
Examples
Referring to the attached drawings 1-2, the soft mold with the spliced optical structure comprises at least two substrate layers 1 to be spliced, wherein the substrate layers 1 are made of PET (polyethylene terephthalate) or PC (polycarbonate). The upper surface of every substrate layer 1 all is provided with optical structure layer, and two relative structure borders of substrate layer 1 are first welding border 11, second welding border 12 respectively, can form the welding seam between the first welding border 11 of arbitrary substrate layer 1 and the second welding border 12 of another substrate layer 1. And a laser adhesive tape 3 matched with the fiber laser 2 for use is uniformly arranged between the first welding edge 11 and the second welding edge 12 at the welding gap.
The fiber laser 2 is arranged above the welding seam and used for emitting a near-infrared laser beam with the width of 1-50mm and the wavelength of 800-1100nm towards the welding seam. And a focusing lens is further arranged between the fiber laser 2 and the welding gap and used for focusing the near-infrared laser beam emitted by the fiber laser 2 to form a near-infrared laser spot.
Illustratively, the fiber laser 2 is a small core silicon-based fiber laser with a built-in laser source, which can convert a beam of near-infrared laser into a near-infrared laser spot having a focal size of 10-45 μm when the near-infrared laser beam is projected onto a focusing lens having a focal length of 150 mm.
The upper surfaces of the first welding edge 11 and the second welding edge 12 positioned at the welding seam define an incidence surface for incidence of the near-infrared laser light spot; the near-infrared laser beam emitted by the fiber laser 2 can be focused by the focusing lens and then can be irradiated onto the coating adhesive layer along the incident surface.
The width of the laser adhesive tape 3 is 1-50mm, and the thickness is 30-155 μm. The laser adhesive tape 3 comprises an adhesive tape base layer 31 which is evenly and flatly arranged along the lower surfaces of the first welding edge 11 and the second welding edge 12, and coating adhesive layers 32 facing the welding gap are evenly distributed on the upper surface of the adhesive tape base layer 31. Wherein, the material of the tape base layer 31 is PET, the thickness is 25-125 μm, the coating adhesive layer 32 comprises a near infrared ray absorption coating and an epoxy resin adhesive coated on the tape base layer 31, and the thickness of the coating adhesive layer 32 is 5-30 μm. The near infrared ray absorption coating is made of tungsten trioxide or tin oxide.
During splicing, a near-infrared laser beam emitted by the optical fiber laser 2 is focused by the focusing lens to form a near-infrared laser spot, the near-infrared laser spot can irradiate the coating adhesive layer 32 along an incident surface, and at the moment, the near-infrared absorption coating on the coating adhesive layer 32 can absorb the light energy of the near-infrared laser and instantly convert the light energy into heat energy; after the first welding edge 11 and the second welding edge 12 at the welding gap are subjected to heat conduction, the PET polymer starts to melt and permeates into the welding gap, so that PET polymer molecules at the first welding edge 11 and the second welding edge 12 are expanded at the welding gap to form chain entanglement, the welding gap is fully filled, and tight welding is formed. Meanwhile, the vibration stress and the thermal stress of the soft mold are reduced, the drawing force of the first welding edge 11 and the second welding edge 12 positioned at the welding seam is improved, the connecting section difference is reduced, and the service life and the stability of the spliced soft mold are improved.
In one example, the thickness of the substrate layer 1 is 50-300 μm, the optical structure layer is formed by curing acrylic resin through UV imprint, and the refractive index of the optical structure layer is 1.48-1.64.
Further, the thickness of the base material layer 1 was 250 μm.
In one example, the optical structure layer is one of a microlens structure layer, a micro-concave mirror structure layer, a prism structure layer, and a diffusion structure layer.
When the optical structure layer adopts a micro-lens structure layer or a micro-concave lens structure layer, referring to fig. 3, the optical structure layer includes a plurality of hemispherical or quasi-hemispherical lens grooves 41 distributed on the substrate layer 1 in an array, the diagonal length of the lens grooves 41 is 20-45 μm, and the height of the structural vertex of the lens groove 41 is 1/4-1/2 of the diagonal length.
When the optical structure layer is a prism structure layer, referring to fig. 4, the optical structure layer includes a plurality of prisms 42 uniformly distributed on the substrate layer 1, the cross section of the prism 42 is triangular, the height of each prism 42 is 5-50 μm, and the vertex angle is 80-110 °.
When the optical structure layer adopts a diffusion structure layer, the optical structure layer is formed by embossing a plurality of rugged microstructures 43, and the haze of the optical structure layer is 50-99%.
In order to verify the strength of the welding seam of the present embodiment, the applicant made the following comparative test.
Preparing a micro-lens structure layer by adopting acrylic resin UV glue (UV-A) of Jiangsu Hongde photoelectric material Co., Ltd, wherein the refractive index of the micro-lens structure layer is 1.53, the diagonal length is 30 mu m, and the peak height is 15 mu m; PET having a thickness of 250 μm and a length of 950mm was used as the base material layer.
Preparation of sample 1: evenly dividing and flatly arranging laser adhesive tapes on the lower surfaces of the first welding edge and the second welding edge of the two substrate layers, wherein the thickness of the adhesive tape base layer is 50 micrometers, the width of the adhesive tape base layer is 8mm, and the thickness of the coating adhesive layer is 5 micrometers. And a small-core-diameter silicon-based fiber laser is arranged above the micro-lens structure layer, a laser beam emitted by the fiber laser is a near infrared laser beam with the width of 8mm and the wavelength of 980nm, the laser beam is reflected on a focusing lens with the focal length of 150mm and is converted into a near infrared laser spot with the focal size of 15 mu m, and the laser spot irradiates the coating bonding layer through a welding gap, so that the welding gap is tightly welded.
Preparation of sample 2: and (3) uniformly and flatly bonding an electroplating adhesive tape between the first welding edge and the second welding edge of the two substrate layers, wherein the thickness of the electroplating adhesive tape is 60 micrometers, the width of the electroplating adhesive tape is 10mm, and the first welding edge and the second welding edge are bonded and fixed by adopting a manual extrusion bonding mode.
The results of the performance tests of samples 1 and 2 are shown in table 1. Wherein, the welding strength-drawing force is tested by a 50KG fracture stretcher, and the section difference is tested by a conjugate focus microscope.
Table 1 soft mold splicing strength test results
As can be seen from table 1: compared with sample 2, sample 1 has higher splicing strength-drawing force, lower splicing edge segment difference, longer service life and shorter splicing time. Therefore, the splicing type optical structure soft die can effectively improve the strength and stability of a welding seam, improve the drawing force of a welding edge, reduce the connection section difference of the welding edge and improve the yield.
The above embodiments are provided only for illustrating the technical idea and features of the present invention, and the purpose of the present invention is to provide those skilled in the art with understanding and implementing the present invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.
Claims (10)
1. The utility model provides a concatenation formula optical structure flexible mould which characterized in that: the optical structure comprises at least two substrate layers to be spliced, wherein an optical structure layer is arranged on the upper surface of each substrate layer, two structure edges opposite to each other of the substrate layers are a first welding edge and a second welding edge respectively, and a welding gap can be formed between the first welding edge of any one substrate layer and the second welding edge of the other substrate layer; laser adhesive tapes matched with the fiber laser for use are uniformly arranged between the first welding edge and the second welding edge of the welding seam; the laser adhesive tape comprises an adhesive tape base layer arranged on the lower surfaces of the first welding edge and the second welding edge, and coating adhesive layers facing the welding gap are uniformly distributed on the upper surface of the adhesive tape base layer.
2. The optical structure flexible mold according to claim 1, wherein: the upper surfaces of the first welding edge and the second welding edge positioned at the welding seam define an incidence surface for incidence of the near-infrared laser beam; and the near-infrared laser beam emitted by the optical fiber laser can be irradiated onto the coating bonding layer along the incident surface.
3. The optical structure flexible mold according to claim 2, wherein: the width of the near-infrared laser beam emitted by the optical fiber laser is between 1 and 50mm, and the wavelength is between 800-1100 nm.
4. The optical structure flexible mold according to claim 2, wherein: the coating adhesive layer comprises a near infrared ray absorption coating and an epoxy resin adhesive which are coated on the adhesive tape base layer.
5. The optical structure flexible mold according to claim 1, wherein: the thickness of the base material layer is 50-300 mu m, the thickness of the adhesive tape base layer is 25-125 mu m, and the thickness of the coating adhesive layer is 5-30 mu m.
6. The flexible mold for optical structures as claimed in any one of claims 1 to 5, wherein: the optical structure layer is formed by acrylic resin through UV imprint curing, and the refractive index of the optical structure layer is 1.48-1.64.
7. The optical structure flexible mold according to claim 6, wherein: the optical structure layer adopts one of a micro-lens structure layer, a micro-concave mirror structure layer, a prism structure layer and a diffusion structure layer.
8. The optical structure flexible mold according to claim 7, wherein: when the optical structure layer adopts a micro-lens structure layer or a micro-concave mirror structure layer, the optical structure layer comprises a plurality of lens grooves which are distributed on the substrate layer in an array manner and are hemispherical or similar to hemispherical, the diagonal length of each lens groove is 20-45 mu m, and the height of the structural vertex of each lens groove is 1/4-1/2 of the diagonal length of each lens groove.
9. The optical structure flexible mold according to claim 7, wherein: when the optical structure layer adopts a prism structure layer, the optical structure layer comprises a plurality of prisms uniformly distributed on the substrate layer, the cross sections of the prisms are triangular, the height of each prism is 5-50 mu m, and the vertex angle is 80-110 degrees.
10. The optical structure flexible mold according to claim 7, wherein: when the optical structure layer adopts a diffusion structure layer, the optical structure layer is formed by stamping a plurality of rugged microstructures, and the haze of the optical structure layer is 50-99%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220211792.7U CN216941859U (en) | 2022-01-25 | 2022-01-25 | Splicing type optical structure flexible mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220211792.7U CN216941859U (en) | 2022-01-25 | 2022-01-25 | Splicing type optical structure flexible mold |
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| Publication Number | Publication Date |
|---|---|
| CN216941859U true CN216941859U (en) | 2022-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220211792.7U Active CN216941859U (en) | 2022-01-25 | 2022-01-25 | Splicing type optical structure flexible mold |
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| CN (1) | CN216941859U (en) |
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- 2022-01-25 CN CN202220211792.7U patent/CN216941859U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Splice type optical structure soft mold Effective date of registration: 20230807 Granted publication date: 20220712 Pledgee: Bank of Nanjing Co.,Ltd. Xuzhou Branch Pledgor: Jiangsu Hongde photoelectric material technology Co.,Ltd. Registration number: Y2023980051139 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |