KR101817709B1 - Producing method for forming mold with pattern of retro-reflection using ultraviolet-curable material - Google Patents

Abstract

The present invention relates to a method of manufacturing a patterned mold using a UV curable material, and more particularly, to a method of manufacturing a patterned mold in which a patterned mold is formed, and a thermosetting material is formed by sequentially forming and laminating patterns using a UV- The present invention relates to a pattern mold manufacturing method using a UV curing material, which is used as a pattern mold for molding a recursive reflective product through a process of forming a monolithic mold,
Since the pattern mold manufacturing method using the UV curing material of the present invention does not require the reassembling alignment process, there is an advantage that a mold capable of molding a recursive reflector with high retroreflective efficiency can be manufactured by minimizing the assembly alignment error.
In addition, the pattern mold manufacturing method using the UV curing material of the present invention has advantages of simplifying the manufacturing process and reducing the cost burden by using an economical resin.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a patterned mold using a UV curing material,

The present invention relates to a method of manufacturing a patterned mold using a UV curing material, and more particularly, to a method of manufacturing a patterned mold using a UV cured material, The present invention relates to a pattern mold manufacturing method using a UV curing material which is used as a pattern mold for molding a recursive reflective product through a process of preparing a metal mold which is laminated and integrated,

Reflective reflectors that reflect incident light toward a light source are well known. The retroreflection refers to the case where the path of the reflection mirror and the incident path are parallel, and the retroreflector (or recurrent reflection) refers to retroreflecting the incident light. Reflective reflectors are used for marking such as road markings and construction markings, visibility tapes for automobiles and motorcycles, safety materials for medical and life-saving areas, marking of signs, visible light, laser light or infrared light reflection sensors Is widely used.

In general, the recursive reflector is classified as having a glass bead and having a cube corner. A cube corner refers to a triangular pyramid with three sides, three triangles that are mutually perpendicular to each other at a vertex.

These retroreflective materials have different retroreflective characteristics depending on the incidence angle of incident light and have different strengths and weaknesses. For example, a recursive reflector using glass beads has a disadvantage in that the retroreflective efficiency is uneven irrespective of the incident angle, but the retroreflective efficiency is low overall and the reflection function is lost when the surface is watered. On the other hand, in the case of the retroreflector using the cube corner, the retroreflectance is very high for the front light incident from the front side, but the retroreflectance is very low for the side light having a large incident angle that is obliquely incident, There is a disadvantage that the clock (retroreflective field) is very narrow. In addition, the cube-corner retroreflector is very difficult to change the direction of the retroreflective clock, so it is practically impossible to reflexively reflect light with a large incident angle. Methods for improving these problems are disclosed in Korean Patent Publication No. 10-2013-0124116 and Korean Patent Registration No. 10-0909386.

In general, however, a recursive reflector with a cube corner is manufactured through a master mold that is formed in a relief or relief shape for the desired geometric shape of the cube corner, and there are some problems in manufacturing the master mold.

A typical master mold is manufactured by assembling a plurality of thin plates and processing the pattern. Korean Patent Laid-Open Publication No. 10-2014-0030002 and Korean Patent Registration No. 10-0573526 disclose a method of manufacturing a mold having a plurality of thin plates aligned and assembled and having a cube corner that can be retroreflected on the processed surface .

The master mold manufacturing method using such a plurality of thin plates is difficult to manufacture with a uniform thickness, and voids are generated during thin plate assembly, resulting in an assembly error and a high cost. In addition, the retroreflector through the master mold has a disadvantage in that the surface is easily stained and the reflectance is reduced.

Korean Patent Laid-Open Publication No. 10-2014-0030002: Master mold production method for manufacturing retroreflector Korean Patent Registration No. 10-0573526: Cube corner type sheet forming mold and manufacturing method thereof

The present invention has been proposed in order to solve the above-mentioned problems, and it is an object of the present invention to provide a method of manufacturing an integrated molding resin mold by forming a single thin plate having a pattern and molding the same using UV resin, It is an object of the present invention to provide a pattern mold manufacturing method using a UV curing material which can minimize the misalignment of assemblies by manufacturing a preform mold of a resin mold.

According to another aspect of the present invention, there is provided a method of manufacturing a pattern mold using a UV curable material, the method comprising the steps of: A thin plate manufacturing step of manufacturing a thin plate including a horizontal processing surface so as to interconnect the first side and the second side; A pattern processing step of forming a groove having a predetermined pattern on the processed surface of the thin plate; A molding resin mold manufacturing step of manufacturing an integrated molding resin mold by transferring and laminating the unit molding resin produced by filling resin on the processed surface on which the pattern is formed; A step of depositing a conductive resin material on the molding resin mold; And a step of fabricating a preform mold of a molding resin mold in which the preform mold of the molding resin mold capable of molding a recursive reflection structure is formed on the recursive reflective object.

Wherein the molding resin mold forming step comprises: a thin plate-down step of horizontally positioning the thin plate so that the machined surface of the thin plate is laterally directed; A step of forming a unit molding resin by filling the resin with a width formed by the first surface and the second surface so that the resin contacts the processing surface of the thin plate on which the pattern is formed; A unit molding resin transfer step of transferring the molding resin downward by the width of the thin plate; and a transfer step of transferring the unit resin to the processing surface of the thin plate so that the unit molding resin is laminated above the unit molding resin And a unit-molded resin lamination step of filling the resin by the width of the thin plate.

The resin is preferably a UV curable resin.

Since the pattern mold manufacturing method using the UV curing material of the present invention does not require the reassembling alignment process, there is an advantage that a mold capable of molding a recursive reflector with high retroreflective efficiency can be manufactured by minimizing the assembly alignment error.

In addition, the pattern mold manufacturing method using the UV curing material of the present invention has advantages of simplifying the manufacturing process and reducing the cost burden by using an economical resin.

FIG. 1 is a perspective view of a thin plate of a pattern mold manufacturing method using a UV curing material according to an embodiment of the present invention,
FIG. 2 is a perspective view of a thin plate formed with the pattern of FIG. 1,
FIG. 3 is a schematic view of manufacturing a unit molding resin using a thin plate having the pattern shown in FIG. 1,
FIG. 4 is a view showing a process of manufacturing a molding resin mold by transferring and laminating the unit molding resin of FIG. 1,
Fig. 5 is a side view of the molding resin mold of Fig. 1,
Fig. 6 is a partial plan view of a preform die of a molding resin mold produced using the molding resin mold of Fig. 1,
7 is a block diagram of a pattern mold manufacturing method using the UV curing material of FIG. 1,
8 is a block diagram of a molding resin mold manufacturing process of FIG.

Hereinafter, a method of manufacturing a patterned mold using a UV curing material according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The retroreflection refers to the case where the path of the reflection mirror and the incident path are parallel, and the retroreflector (or recurrent reflection) refers to retroreflecting the incident light.

The structure causing the retroreflection is a structure using a glass bead and a structure using a geometric shape of a cube corner (Coner-Cube). A method for manufacturing a mold for molding a recursive mirror according to the present invention is a molding die used for manufacturing a recursive reflector having a cube corner, that is, a method for manufacturing a master mold.

1 to 8 illustrate a method of manufacturing a patterned mold using a UV curing material according to the present invention.

Referring to FIG. 7, a pattern mold manufacturing method using a UV curing material according to the present invention includes steps S1, S2, S3, (S8), and a step of forming a preformed mold of a molding resin mold (S9).

The thin plate manufacturing step S1 includes a horizontal processing surface 15 so as to mutually connect the first side surface 11 and the second side surface 13 and the first side surface 11 and the second side surface 13, The thin plate 10 is manufactured. The thin plate 10 is formed by hot rolling or cold rolling. It is preferable that the thin plate is made of a dimensionally stable material capable of retaining its precision. Metallic materials such as brass, nickel, copper and aluminum are mainly used as the thin plate, but machining plastic such as polyethylene terephthalate, polymethyl methacrylate and polycarbonate may be applied. The thin plate preferably has a thickness of at least 0.1 mm in height of 5.0 to 100.0 mm and a width of 10 to 500 mm, but is not limited thereto.

The patterning step S2 is a step of forming a groove having a predetermined pattern on the processing surface 15 of the thin plate 10. The pattern formed on the processing surface 15 has a structured surface comprising a plurality of optically op- tional cube corner elements. For example, the pattern of the thin plate disclosed in Korean Patent Registration No. 10-0536022 can be applied. The pattern of the thin plate 10 is not limited as long as one face of the molding resin mold 20 to be described later can be molded so that the retroreflection can occur.

In the molding resin mold manufacturing step S3, a plurality of unit molding resins 21 produced by filling a resin on the working surface 15 on which the pattern 17 is formed are transferred and laminated to produce an integrated molding resin mold 20 .

The molding resin mold manufacturing step S3 includes a thin plate-laying step S4, a unit molding resin manufacturing step S5, a unit molding resin feeding step S6, and a unit molding resin laminating step 7.

The thin plate laying step S4 is a step of horizontally positioning the thin plate 10 so that the working surface 15 of the thin plate 10 is laterally directed as the thin plate 10 shown in Fig.

The unit molding resin manufacturing step S5 is a step of filling the resin by the width formed by the first side face 11 and the second side face 13 so that the resin contacts the processing face 15 of the thin plate 10 on which the pattern 17 is formed Thereby forming the unit molding resin 21. The unit molding resin 21 has a cube corner structure in which a retroreflection can occur on a side surface facing the processing surface 15 of the thin plate 10.

The resin may be a UV curable resin or a thermosetting resin, but it is preferable that a UV curable resin having a relatively high production efficiency is applied.

Ultraviolet rays (UV) curable resin is a resin which has a property of polymerization curing by using ultraviolet rays. UV curable resin can be used for materials having a relatively short curing time and weak in heat, so that the production efficiency of a plurality of unit- And the energy consumption can be reduced by curing by ultraviolet rays, thereby providing an economical production process. The UV curing resin does not use a separate solvent, which is advantageous for environmental problems. In addition, the UV cured resin can facilitate copying and ensure homogeneity due to copying. In order to cure the UV curable resin, it is needless to say that a UV sterilizing lamp (not shown) should be installed so as to irradiate ultraviolet rays to the UV curable resin. When a thermosetting resin is applied to a unit molding resin, a drying device capable of applying heat to the thermosetting resin must be provided.

The unit molding resin transferring step S6 is a step of moving the molded unit molding resin 21 downward by the width of the thin plate 10. [

The unit molding resin laminating step (S7) is a step of molding and forming the unit molding resin (21) on the upper side of the unit molding resin (21). In the unit molding resin lamination step (S7), the resin is filled by the width of the thin plate so as to be in contact with the processing surface (15) of the thin plate (10) and the upper surface of the transferred unit molding resin (21). The unit molding resin transfer step S6 and the unit molding resin lamination step S7 may be repeated depending on the number of unit molding resins 21 to be molded.

An example of the molding resin mold production step (S3) will be described. 3 and 4 show a state in which a plurality of unit molding resins 21 made up of the first unit molding resin 21a, the second unit molding resin 21b and the third unit molding resin 21c are integrated with the molding resin mold 20 ) Is produced as an example.

The resin is filled to the side where the machining surface 15 of the thin plate 10 lying sideways is formed in the thin plate-laying step S4. Although not shown, the first forming die, in which the resin is filled, is open in the direction toward the machined surface 15, with the inner space being as wide as the distance between the first side and the second side of the thin plate. The first unit molding resin 21a having the side surface corresponding to the processing surface of the thin plate is molded while the resin is filled in the inner space of the molding die, and the unit molding resin manufacturing step S5 is completed.

The first unit molding resin 21a is fed downward in the unit molding resin feeding step S6 and the second unit molding resin 21b is fed upward from the first unit molding resin 21a in the unit molding resin laminating step S7 Is formed.

A second molding frame (not shown) may be provided to fabricate the second unit molding resin 21b. The second forming mold has a structure that is opened downward in the first forming mold structure. This is to allow the second unit molding resin 21b to be laminated so as to be in contact with the first unit molding resin 21a conveyed downward. Therefore, the second unit molding resin 21b is formed so as to be integrally formed with the first unit molding resin 21a above the first unit molding resin 21a.

When the second unit molding resin 21b is completed, the second unit molding resin 21b is moved downward by the width of the thin plate through the unit molding resin transfer step S6. At this time, the first unit molding resin 21a integrally formed with the second unit molding resin 21b is also moved by the moving distance of the second unit molding resin 21b. After the second unit molding resin 21b is transferred, the third unit molding resin 21c is produced through the unit molding resin lamination step S7.

In the embodiment of the present invention, the molding resin mold 20 is manufactured by manufacturing three unit molding resins. However, depending on the length of the molding resin mold applied to the recursive reflector to be finally produced, It is needless to say that the number of resin production can be changed.

On the other hand, since the first and second forming molds must be considered to be able to be irradiated with UV when a UV curable resin is applied so that the unit molding resin 21 filled in the inside can be cured, an open form may be applied. Alternatively, the first and second molding dies may be configured to transmit heat to the first and second molding dies so as to apply heat when the thermosetting resin is applied.

Thus, the conductive material deposition step S8 is performed on the molding resin mold 20 manufactured in the molding resin mold manufacturing step S7. Since the molding resin mold is non-conductive since the optical surface is embossed, the electroplating is impossible in the electroforming step to be described later. Therefore, after proper pretreatment and surface conductive treatment, electroplating should be performed. In other words, since plastics do not conduct electricity in the plating solution, it is a process that must be treated in order to perform nickel plating because a conductor must be coated to enable plating.

As the deposition method of the conductive material, the deposition method suitable for the vacuum deposition ROLL TO ROLL method and the sputtering ROLL TO ROLL method is a vacuum deposition ROLL TO ROLL method for a metal having a low melting point and a sputtering ROLL TO ROLL method for a metal having a high melting point. Lt; / RTI > If the metal is Ag, Cu, Au, SUS, Ni, Al, Fe-Ni, ZN or the like, the metal layer may be applied as a single layer or multiple layers as required.

When the conductive material deposition in the molding resin mold is completed in the conductive material depositing step S8, the preform manufacturing step S9 of the molding resin mold is proceeded. In the electroforming step S9, electroforming is performed on the surface of the molded resin mold 20 on which the conductive material is deposited, that is, above the working surface 15 with a metal such as nickel and cobalt, . 6 is a front view of the surface of the preform die 30 on which the pattern is formed. The pattern of the preform die 30 is determined by the pattern 17 of the thin plate 10.

The electroforming die 30 is used as a master mold for molding a recursive reflector having a cube corner structure. That is, the electroforming die 30 corresponds to a patterning mold using a UV curing material to be produced in the present invention.

Since the pattern mold manufacturing method using the UV curing material according to the present invention does not require reassembling alignment process, it is possible to manufacture a mold capable of molding a recursive reflector with high retroreflective efficiency by minimizing the assembly alignment error . In addition, the pattern mold manufacturing method using the UV curing material according to the present invention has an advantage of simplifying the manufacturing process and reducing the cost burden by using an economical resin.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

10: Lamination
11: First aspect
13: second side
15:
17: Pattern
20: molding resin mold
21: Unit forming resin
30: Electroplated mold
S1: Sheet metal manufacturing step
S2: Pattern processing step
S3: Steps of molding resin mold
Step S4:
S5: Unit molding resin production step
S6: Unit molding resin transfer step
S7: Unit forming resin lamination step
S8: Step of depositing conductive resin mold conductive material
S9: Step of making mold for injection mold

Claims (3)

A pattern mold manufacturing method using a UV curing material for producing a recursive reflector,
A thin plate manufacturing step of manufacturing a thin plate including first and second side surfaces parallel to each other and a horizontal processing surface so as to interconnect the first side surface and the second side surface;
A pattern processing step of forming a groove having a pattern including a plurality of optically opposed cube corner elements on the processed surface of the thin plate;
A molding resin mold manufacturing step of manufacturing a plurality of unit molding resins manufactured by filling a resin on the machined surface on which the pattern is formed, into an integrated molding resin mold;
A step of depositing a conductive resin material on the molding resin mold;
And a step of fabricating an electroforming mold of a molding resin mold in which the mold of the molding resin mold is formed so as to form a recursive reflecting structure on the recursive reflector,
The molding resin mold manufacturing step
A thin plate-down step of horizontally positioning the thin plate so that the machined surface of the thin plate is laterally oriented;
Filling the resin with a width of the first side and the second side so that the resin contacts the processing surface of the thin plate on which the pattern is formed;
A unit molded resin transfer step of transferring the molded unit molded resin downward by a width of the thin plate;
And a unit molding resin laminating step of filling the resin by the width of the thin plate so that the resin is brought into contact with the processing surface of the thin plate so that the unit molding resin can be molded and formed above the unit molding resin Wherein the UV curable material is used for forming a pattern mold. delete The method of claim 1, wherein the resin comprises
Wherein the UV curable resin is a UV curable resin.

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