KR20180045367A - Apparatus and method for injection molding using light exposure tenizue - Google Patents

Abstract

The present invention relates to an injection molding method and an injection molding apparatus using an exposure technique. The purpose of the present invention is to suppress the formation of burr when performing an injection molding process using the exposure technique. A molding apparatus of the present invention as a molding apparatus using a sequential exposure technique comprises a first mold and a second mold. The first mold includes: a cavity which is formed in a first surface formed to face the second mold among surfaces formed on the first mold, and in which resin can be received; and an exposure module which is disposed to face a second surface of the first mold and is able to irradiate light to the second surface. The second mold includes a core formed at a position corresponding to the cavity, and is moved in the direction of the first surface of the first mold to provide a pressure to the received resin. The exposure module first enables resin received onto a portion of the first surface to be polymerized by first irradiating the light to a portion of the second surface of the first mold.

Description

TECHNICAL FIELD [0001] The present invention relates to an injection molding method and apparatus using an exposure method,

The present invention relates to an injection molding method and apparatus using an exposure technique. Particularly, it is aimed to reduce the burr generated during the injection molding through the exposure technique.

Since plastics are advantageous in mass production at low cost, light in weight, and can realize various physical properties, they are used as core materials in most products leading to domestic and overseas industries. Among them, the largest number of molded articles are produced by the injection molding method. In particular, injection molding products ranging from automobiles, mobile phones, household appliances, to vessels, aviation and architectural interior and exterior materials are being manufactured in accordance with the trend of high-grade and multifunctional plastic products.

Exposure Technique Injection molding is one of the injection molding techniques, and is an injection molding technique using photoreactive materials. When filling the material in the cavity and irradiating light while pressurizing the filled material, the filled material is hardened and a product is produced.

In this case, if there is a minute gap in the cavity in which the material is filled, a burr may be generated due to a minute gap. As the filled resin is pressurized, at least a part of the resin flows into the fine gap, and the material is hardened while flowing and burrs are generated.

Burrs cause many problems, such as impairing the aesthetics of the product produced and creating unintended products.

Therefore, much research has been conducted on a method and apparatus for suppressing burr formation during injection molding using an exposure technique.

Korean Patent Application No. KR20120105822A

The present invention has been devised in response to the background art described above, and the present invention aims to suppress the generation of burrs during injection molding using an exposure technique.

In order to solve the above-described problems, a first aspect of the present invention provides a molding apparatus using a sequential exposure technique. The molding apparatus comprises: a first mold; And a second mold, wherein the first mold includes: a cavity in which a resin can be received in a first surface formed to face the second mold among the surfaces formed in the first mold, and the first surface And an exposure module facing the second surface of the first mold and capable of irradiating a light beam toward the second surface, the second mold being formed at a position corresponding to the cavity Wherein a pressure is applied to the received resin in accordance with the relative movement of the first mold and the second mold, and the exposure module is arranged to apply a pressure to the second surface of the first mold, The polymerization of the resin contained on a portion of the first side is firstly initiated.

The second aspect provides an injection molding method using an exposure technique, the method comprising: a resin filling step of filling the cavity of the first mold with resin, the first mold being formed to face the second mold A first surface having the cavity, a second surface opposing the first surface, and an exposure module capable of irradiating light toward the second surface; A first irradiation step of irradiating a light beam toward an edge portion of the second surface; A pressing step of pressing the filled resin with a second mold after the first irradiation step is started; And a second irradiation step of irradiating a light beam toward the second surface; . ≪ / RTI >

The third aspect provides a cured resin produced by an injection molding method using an exposure technique, the cured resin comprising: a resin filling step of filling a cavity provided in the first mold with a resin, An exposure module formed to face the mold and having a first surface with the cavity, a second surface opposite the first surface, and an exposure module capable of irradiating light toward the second surface; A first irradiation step of irradiating a light beam toward an edge portion of the second surface; A pressing step of pressing the filled resin by using a second mold after the first irradiation step is started; And a second irradiation step of irradiating a light beam toward the second surface; ≪ / RTI >

A fourth aspect of the present disclosure provides a molding apparatus that uses a sequential exposure technique, the molding apparatus comprising: a first mold; And a second mold, wherein the first mold includes: a cavity in which a resin can be received in a first surface formed to face the second mold among the surfaces formed in the first mold, and the first surface And a first exposure module disposed facing the second face of the first mold and capable of irradiating a light beam toward the second face, the second mold having a position corresponding to the cavity Wherein pressure is applied to the received resin in accordance with the relative movement of the first mold and the second mold, and wherein one or more sides of the first mold and one or more sides of the second mold At least one of the first exposure module and the second exposure module may include a second exposure module for irradiating a light beam toward an edge portion of the first surface in which the resin is accommodated before the first exposure module.

According to the present invention, burr formation can be suppressed during injection molding using an exposure technique.

Various aspects are now described with reference to the drawings, wherein like reference numerals are used to refer to like elements throughout. In the following examples, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more aspects. However, it will be apparent that such aspect (s) may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more aspects.
1 is a schematic view for explaining an injection molding apparatus according to an embodiment of the present invention.
FIG. 2 is a view for explaining an operational process of an injection molding apparatus according to an embodiment of the present invention.
3 is a diagram illustrating a sequential exposure technique in accordance with an embodiment of the present invention.
4 is a view for explaining an injection molding method according to one embodiment of the present invention.

Various embodiments are now described with reference to the drawings, wherein like reference numerals are used throughout the drawings to refer to like elements. In this specification, various explanations are given in order to provide an understanding of the present invention. It will be apparent, however, that such embodiments may be practiced without these specific details. In other instances, well-known structures and devices are provided in block diagram form in order to facilitate describing the embodiments.

The terms "component," "module," system, "and the like, as used herein, refer to a computer-related entity, hardware, firmware, software, combination of software and hardware, or execution of software. For example, a component may be, but is not limited to, a process executing on a processor, a processor, an object, an executing thread, a program, and / or a computer. For example, both an application running on a computing device and a computing device may be a component. One or more components may reside within a processor and / or thread of execution, one component may be localized within one computer, or it may be distributed between two or more computers. Further, such components may execute from various computer readable media having various data structures stored therein. The components may be, for example, a signal (e.g., a local system, data from one component interacting with another component in a distributed system, and / or data over a network, such as the Internet, Lt; RTI ID = 0.0 > and / or < / RTI >

The description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features presented herein.

The first mold and the second mold in this specification may correspond to one of the movable mold and the stationary mold, respectively. That is, the first mold and the second mold may be used interchangeably. That is, although the first mold in this specification is represented as an example of a fixed side mold for the convenience of explanation, it is noted that it may be used as a movable mold (i.e., the first mold is moved and the second mold is fixed) . In addition, although the second mold in this specification is represented as an example of a movable mold for convenience of explanation, it is noted that it may be used as a stationary mold (i.e., the first mold is moved and the second mold is fixed) . In addition, the edge portions in the present specification may be referred to as " ", " ", " May be used to refer to any portion where cores may be generated, such as portions " "

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic view for explaining an injection molding apparatus according to an embodiment of the present invention.

Referring to FIG. 1 (a), the molding apparatus 1000 may include a first mold 200 and a second mold 100. The first mold 200 may include a cavity 250 in which a material can be filled and may include an exposure module 240 for irradiating the cavity 250 with a light beam. Although only one exposure module 240 is described and illustrated herein for convenience of explanation, a plurality of exposure modules may exist. For example, the first exposure module may irradiate a resin toward the resin from the bottom of the first mold, And the second exposure module may irradiate the light beam toward the edge portion of the resin at the side of the first mold or the second mold.

Referring to FIG. 1 (a), the cavity 250 of the molding apparatus 1000 may be filled with a material. In this case, the material may be a photocurable resin. The photocurable resin in this specification may include any resin that can be cured by the influence of light.

2B, the resin filled in the cavity 250 of the molding apparatus 1000 can be pressed by the movement of the second mold 100, Can be hardened.

As a result, the molding apparatus 1000 can produce a product having a specific shape.

In this case, if there is a gap in the first mold 200 in which the cavity 250 is formed, the resin filled in the cavity may flow into the gap by pressurization, resulting in burrs.

In one embodiment of the invention, to reduce the incidence of burrs, the light can first be irradiated to the periphery of the gap and / or the gap before the filled material is pressed, and as a result the periphery of the gap and / The viscosity of the material located at the bottom of the mold can be increased, and the incidence of burrs can be reduced.

FIG. 2 is a view for explaining an operational process of an injection molding apparatus according to an embodiment of the present invention.

According to an embodiment of the present invention, the molding apparatus 1000 may include a first mold 200 and a second mold 100.

The first mold 200 may have a cavity 250 in which resin can be received in the first surface 212 formed to face the second mold 100 among the surfaces formed in the first mold 200. Also, a second surface 214 may be provided in a direction opposite to the first surface 212.

The first mold 200 may include an exposure module 240 and the exposure module 240 may irradiate a light beam toward the second side 214. Further, the exposure module 240 can irradiate the light toward the first surface 212 and irradiate the light to the cavity 250. [ For example, the exposure module 240 may first irradiate the light beam toward the edge of the second side of the first mold before the pressure in the cavity is increased.

The second mold 100 may have a core 120 at a position corresponding to the cavity 250. The second mold 100 can move to the first mold 200 and the core 120 can press the cavity 250 when the second mold 100 moves in the direction of the cavity 250. [ In this case, when the cavity 250 is filled with a material, the core 120 can press the filled material.

The material to be filled in the cavity 250 may vary. For example, the cavity 250 may be filled with a thermoplastic resin, and the photoreactive resin may be filled. When the cavity 250 is filled with the photoreactive resin, the filled photoreactive resin can be cured by the light irradiated by the exposure module 240. In this case, the photoreactive resin may include an ultraviolet curing resin, and the exposure module 240 may irradiate ultraviolet rays. Wherein the resin comprises an ultraviolet curable resin, the light beam comprises ultraviolet light, at least one of the core of the second mold and the cavity of the first mold is affixed with a molded resin, The resin can be molded by the light beam to be irradiated. For example, pressure may be applied to the received resin in accordance with the relative movement of the first mold and the second mold. The relative movement in this specification means movement / movement of at least one of the first mold and the second mold.

According to one embodiment of the present invention, the exposure module 240 includes a plurality of exposures (not shown) that are positioned at a lower portion apart from the second surface of the first mold and facing the second surface, Units.

Each of the plurality of exposure units may be mapped with each of the corresponding portions of the second surface 214 to illuminate the light beam toward corresponding portions of the second surface when illuminated.

In this case, the plurality of exposure units may be divided into a plurality of groups. For example, the plurality of exposure units may be divided into a first exposure unit group arranged to face an edge portion of the second surface 214 and a second exposure unit group arranged to face a portion except an edge portion of the second surface have.

In this case, the edge portion of the second surface 214 means a portion of the second surface 214 that corresponds to the gap formed in the first surface 212. For example, when a fine gap is present on the first surface 212 by the take-out portion formed on the first surface 212, a portion of the second surface 214 corresponding to the fine gap may be an edge portion. As a result, when the exposure module 240 irradiates the light beam toward the edge of the second surface 214, the irradiated light beam can touch a fine gap formed on the first surface 212 and / or its periphery.

The exposure module 240 may first irradiate the light beam toward a portion of the second side of the first mold, thereby causing the polymerization of the resin contained on the portion of the first side to occur first. For example, the molding apparatus 1000 may illuminate the exposure units included in the first exposure unit group disposed so as to face the edge portion of the second surface earlier than the exposure units included in the other exposure unit group. As a result, the molding apparatus 1000 can first cause the polymerization of the resin located in the periphery of the gap and / or the gap of the first surface 212.

Thereafter, the molding apparatus 1000 can cure the material filled in the cavity by lighting the exposure units included in the other groups.

In this case, the molding apparatus 1000 can light the exposure module in various patterns. That is, the exposure module may be turned on in a predetermined order. For example, the exposure module may sequentially irradiate the light beam in a predetermined order from an edge portion of the second surface of the first mold. Further, the molding apparatus 1000 can light the exposure unit so as to sequentially irradiate the light beams in the order from the edge portion of the second surface 214 toward the center portion of the second surface. Further, the molding apparatus 1000 can simultaneously light the exposure units not facing the edge portion of the second surface 214. [

In this case, the molding apparatus 1000 can light on the exposure units not facing the edge portion of the second surface while maintaining the lighting units of the exposure units facing the edge portion of the second surface.

Further, the molding apparatus 1000 may turn off the lighting of the exposure units facing the edge portion of the second surface, and may turn on the exposure units not facing the edge portion of the second surface.

The molding apparatus 1000 may also allow the exposure units to be included in the exposure module to firstly illuminate the light beam toward the edge of the second surface and then to secondarily illuminate the light beam toward the rest except the edge portion of the second surface .

Further, the molding apparatus 1000 can irradiate light rays sequentially in the order from the edge portion of the second surface of the first mold to the center portion of the second surface, but is not limited thereto.

According to one embodiment of the present invention, the first mold 200 may include a top support 210 configured with a first side 212 and a second side 214. And a third surface 260 facing away from the lower surface of the upper support and facing the second surface 214 and having a lower support (not shown) having an exposure module 240 on the third surface 260 230 may be further provided

The first mold 200 may also include peripheral pillar portions 220 that contact the edges of the upper and lower supports 210 and 230 respectively and form the boundary of the first mold 200 have.

The peripheral pillar 220 may have protrusions extending from the first surface 212 of the upper support 210 toward the second mold 100 and the protrusions may be formed on the first surface 212 It is possible to prevent the first mold 200 from flowing out from the edge portion of the first mold 200.

In this case, the upper support part 210 may be composed of a transparent medium which transmits ultraviolet rays. The transparent medium may include a medium that transmits only ultraviolet light and / or a medium that can transmit ultraviolet light as well as other light rays.

According to one embodiment of the present invention, the intensity of the light rays that the exposure module 240 irradiates can be determined based on various factors. For example, the exposure module 240 can determine the illumination intensity of the light beam based on at least one of the surface tension of the resin filled in the cavity, the width of the gap, and the contact angle between the resin and the first surface 212.

According to one embodiment of the present invention, the resin cured by the exposure module 240 may be attached to the second mold 100. By adhering the cured resin to the second mold 100, the user can easily obtain the molded resin.

According to another embodiment of the present invention, the molding apparatus 1000 may include a control unit (not shown). The control unit (not shown) may be implemented by at least one processor and may control the operations of the molding apparatus 1000 described above.

3 is a diagram illustrating a sequential exposure technique in accordance with an embodiment of the present invention.

Referring to FIG. 2 (a), a gap 244 may be formed between the upper support portion 210 and the peripheral columnar portion 220. If a gap is formed, a portion of the corresponding second surface 214 may be the edge portion of the second surface 214.

The molding apparatus 1000 can irradiate the light toward the edge portion of the second surface 214 before the material 300 filled in the cavity is pressed by the core 120. [

In this case, the exposure module 240 provided on the third surface 260 may include a plurality of exposure units, and the exposure units may be divided into at least two exposure groups.

The first exposure group 242 disposed toward the edge of the second surface 214 among the exposure groups can be turned on before the material 300 filled in the cavity 250 is pressed, The gap formed in the first surface 212 and / or the material located therearound may first be cured.

Referring to FIG. 2 (b), the exposure module 240 can irradiate a light beam toward a part or all of the second surface 214 after the material filled in the cavity 250 is pressed, The material 300 filled in the cavity 250 can be cured.

In this case, the exposure module 240 can irradiate the light beams by lighting the exposure units in various patterns.

For example, the exposure module 240 may illuminate the exposure units included in the second unexposed group of exposure while keeping the lightings of the exposure units included in the first group 242 exposed first.

In addition, the exposure module 240 may turn off the exposure units included in the first group 24 of lighted first, and may turn on the exposure units included in the second unexposed group.

The exposure module 240 can light the exposure units in a predetermined pattern when the exposure units included in the second unexposed group are turned on.

For example, the exposure module 240 may sequentially light the exposure units from the exposure units located at the edge of the third surface 260 to the exposure units located at the center.

In addition, the exposure module 240 may simultaneously light the exposure units included in the second exposure group.

In addition, the exposure module 240 may further divide the exposure units included in the second exposure group into a plurality of exposure groups, and sequentially illuminate the plurality of divided exposure groups.

According to an embodiment of the present invention, the molding apparatus 1000 may first irradiate a portion where a burr may occur to lighten a part of the material filled in the cavity first, thereby reducing occurrence of burrs.

4 is a view for explaining an injection molding method according to one embodiment of the present invention.

In step S310, the cavity provided in the first mold 200 may be filled with resin.

The first mold 200 is formed to face the second mold 100 and has a first surface 212 having a cavity 250 and a second surface 214 facing the first surface 212, And an exposure module 240 that can irradiate a light beam toward the two surfaces 214. [

In step S320, the molding apparatus 1000 may first irradiate the light beam toward the edge of the second side 214. [

In this case, the molding apparatus 1000 can irradiate a light beam through the exposure module 240.

According to one embodiment of the present invention, all of the exposure units included in the exposure module 240 may first irradiate the light beam toward the edge of the second side 214. In addition, the exposure module 240 can be divided into a plurality of groups of exposure units, and at least one of the plurality of exposure groups can first irradiate the light beam toward the edge of the second surface 214.

In this case, the light beam irradiated by the exposure module 240 can increase the viscosity of the resin filled in the cavity, and can harden the uncured resin.

In this case, the edge portion of the second surface 214 means a portion of the second surface 214 that corresponds to the gap formed in the first surface 212. For example, when a fine gap is present on the first surface 212 by the take-out portion formed on the first surface 212, a portion of the second surface 214 corresponding to the fine gap may be an edge portion. As a result, when the exposure module 240 irradiates the light beam toward the edge of the second surface 214, the irradiated light beam can touch a fine gap formed on the first surface 212 and / or its periphery.

In step S330, the molding apparatus 1000 can pressurize the filled resin using the second mold 100. [

The molding apparatus 1000 can press the cavity 250 using the core 120 of the second mold 100. [ The second mold 100 can move toward the first mold 200 and the core of the second mold 100 can press the cavity 250 due to the movement of the second mold 100. [

When the cavity 250 is filled with the resin, the core 120 of the second mold 100 can press the resin filled in the cavity 250. The resin may include a photoreactive resin, and the photoreceptor may include, but is not limited to, ultraviolet curing resin.

In this case, the resin may not flow into the gap due to the resin cured in step S320.

In step S340, the molding apparatus 1000 may irradiate a light beam toward at least a portion of the second surface 214. [

The molding apparatus 1000 can irradiate a light beam toward at least a part of the second surface 214 after the resin filled in the cavity is pressed by using the exposure module 240 so that the resin filled in the cavity It can be cured.

In this case, the molding apparatus 1000 may allow the exposure module 240 to irradiate the light beam toward at least a portion of the second side in a variety of ways.

For example, all of the exposure units included in the exposure module 240 may irradiate a light beam toward the second side 214. [

Further, the exposure module 240 may light the exposure unit to sequentially irradiate the light beams in the order from the edge portion toward the central portion of the second surface.

In addition, the exposure module 240 may illuminate the exposure units not facing the edge portion of the second surface while maintaining the lighting units of the exposure units facing the edge portion of the second surface.

In addition, the exposure module 240 may turn off the lighting of the exposure units facing the edge of the second surface, and may turn on the exposure units not facing the edge of the second surface.

According to one embodiment of the present invention, the molding apparatus 1000 irradiates light first toward the edge portion of the first mold 200 before the resin filled in the cavity is pressed, whereby the resin filled in the cavity It is possible to reduce the flow into the gap. As a result, the burden caused by the gap can be reduced.

According to another embodiment of the present invention, a cured resin can be produced using the method described above.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

Claims (18)

In a molding apparatus using a sequential exposure technique,
A first mold; And
And a second mold,
The first mold comprises:
And a cavity in which a resin can be received in a first surface formed to face the second mold among the surfaces formed in the first mold,
And an exposure module disposed opposite the first surface and facing the second surface of the first mold and capable of irradiating light toward the second surface,
The second mold includes a core formed at a position corresponding to the cavity,
A pressure is applied to the received resin in accordance with the relative movement of the first mold and the second mold, and
Wherein the exposure module is configured to first effect polymerization of the resin contained on a portion of the first surface by first irradiating the light beam toward a portion of the second surface of the first mold,
Molding device. The method according to claim 1,
Wherein the resin comprises an ultraviolet curable resin, the light beam comprises ultraviolet light, at least one of the core of the second mold and the cavity of the first mold is affixed with a molded resin, Wherein the resin is molded by a light beam to be irradiated,
Molding device. The method according to claim 1,
Wherein the exposure module includes a plurality of exposure units located at a lower portion spaced apart from the second surface of the first mold and facing the second surface and each of which is arranged to occupy a portion of a third surface of the first mold, And
Wherein each of the plurality of exposure units is mapped with each of corresponding portions of the second surface to illuminate a light beam toward corresponding portions of the second surface when illuminated,
Molding device. The method of claim 3,
Wherein the exposure module is configured to cause the exposure unit group, which is respectively disposed to face the edge portion of the second surface among the plurality of exposure units, to be turned on earlier than the other exposure units disposed to face the portion except the edge portion of the second surface ,
Molding device. The method according to claim 1,
Wherein the exposure module primarily irradiates the light beam toward an edge portion of the second surface of the first mold before the pressure in the cavity is increased,
Molding device. 6. The method of claim 5,
Wherein the exposure module irradiates the light beam to the edge portion of the second surface firstly and then to the entire second surface secondarily,
Molding device. 6. The method of claim 5,
The exposure module first irradiates the light beam toward the edge portion of the second surface and then irradiates the light ray toward the entire second surface after the second mold starts pressing against the accommodated resin ,
Molding device. The method according to claim 1,
Wherein the exposure module irradiates the light beam to the edge portion of the second surface firstly and then to the remaining portions except for the edge portion of the second surface,
Molding device. The method according to claim 1,
Wherein the exposure module sequentially irradiates the light beams from an edge portion of the second surface of the first mold in a predetermined order,
Molding device. The method according to claim 1,
The first mold comprises:
An upper support portion composed of the first surface and the second surface in which the resin is accommodated;
A lower support part having the third surface facing the second surface, the lower support part being provided on the third surface, the exposure module being spaced apart from a lower surface of the upper support part;
Further comprising:
Molding device. The method according to claim 1,
The first mold comprises:
An upper support portion composed of the first surface and the second surface in which the resin is accommodated;
A lower support spaced apart from a lower portion of the upper support portion and having a third surface facing the second surface and on which the exposure module is disposed; And
A peripheral pillar portion which contacts each of the edge portions of the upper support portion and the lower support portion and forms a boundary of the first mold;
Further comprising:
Molding device. 12. The method of claim 11,
The peripheral post has a protrusion extending from the first surface of the upper support toward the second mold,
The protrusion prevents the resin from flowing out from the edge portion of the first surface to the outside of the first mold,
Molding device. 12. The method of claim 11,
Wherein the upper support comprises a transparent medium that transmits ultraviolet light,
Molding device. 12. The method of claim 11,
Wherein the exposure module irradiates the light beam toward the edge portions of the second surface of the first mold so that the gap between the peripheral pillar portion and the edge portions of the upper support portion becomes smaller, The viscosity of the resin is increased so as not to be introduced,
Molding device. 15. The method of claim 14,
Wherein the exposure module determines an irradiation intensity of the light beam based on at least one of a surface tension of the first surface, a width of the gap, and a contact angle between the resin and the first surface,
Molding device. In an injection molding method using an exposure technique,
A resin filling step of filling a cavity of the first mold with a resin, the first mold being formed to face the second mold and having a first surface having the cavity, a second surface facing the first surface, And an exposure module capable of irradiating a light beam toward the second surface;
A first irradiation step of irradiating a light beam toward an edge portion of the second surface;
A pressing step of pressing the filled resin with a second mold after the first irradiation step is started; And
A second irradiation step of irradiating a light beam toward the second surface;
/ RTI >
Injection molding method. In the cured resin produced by the injection molding method using the exposure technique,
The curable resin comprises:
A resin filling step of filling a cavity of the first mold with a resin, the first mold being formed to face the second mold and having a first surface having the cavity, a second surface facing the first surface, And an exposure module capable of irradiating a light beam toward the second surface;
A first irradiation step of irradiating a light beam toward an edge portion of the second surface;
A pressing step of pressing the filled resin by using a second mold after the first irradiation step is started; And
A second irradiation step of irradiating a light beam toward the second surface;
≪ / RTI >
Cured resin. In a molding apparatus using a sequential exposure technique,
A first mold;
And a second mold,
The first mold comprises:
And a cavity in which a resin can be received in a first surface formed to face the second mold among the surfaces formed in the first mold,
And a first exposure module facing the first surface and facing the second surface of the first mold and capable of irradiating light toward the second surface,
The second mold includes a core formed at a position corresponding to the cavity,
A pressure is applied to the received resin in accordance with the relative movement of the first mold and the second mold,
Wherein at least one of the one or more sides of the first mold and at least one of the one or more sides of the second mold has a second side that irradiates a ray of light toward the edge of the first side of the first side, Comprising an exposure module,
Molding device.

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