KR101828797B1 - Post Hardening Device of 3D Printing Product - Google Patents

Abstract

The present invention relates to a post curing machine of a three-dimensional printing product. The purpose of the present invention is to provide the post curing machine of the three-dimensional printing product, the post curing machine which enables the molded product to be cured uniformly and rapidly by increasing reflectivity of an LED light when curing a molded product by an LED light source within a curing chamber. To achieve this, the post curing machine (10) of the present invention, as the post curing machine of the three-dimensional printing product, the post curing machine which cures the molded product by the LED light source after manufacturing the molded product by a three-dimensional printer by using a photocurable resin, comprises a main body (10a) including an inner space (11), and a door (10b) which is coupled to the main body (10a). The post curing machine (10) of the present invention further comprises a semispherical curing chamber (12) including a first curing chamber (12a) which is formed in a half semispherical shape within the inner space (11) of the main body (10a), the LED light source (13) which is provided on a top portion of the first curing chamber (12a), and a second curing chamber (12b) which is formed in a half semispherical shape in an inner side of the door (10b), wherein the semispherical curing chamber (12) is formed by closing the door (10b), thereby enabling the second curing chamber (12b) to be coupled to the first curing chamber (12a).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a post-

The present invention relates to a post-curing machine for a 3D printing product, and more particularly, to a post-curing machine for manufacturing a molded product by a 3D printing method using a photo-curable resin and then curing the molded product by an LED light source, The present invention relates to a post-curing machine for a 3D printing product in which a curing chamber in which a curing chamber is placed is formed in a hemispherical shape so as to increase the reflectance of the LED light source so that a single LED light source can be used to rapidly heat and cure the molded article.

 There are a mock-up method for producing a product by hand and a cutting method using a numerically controlled machine tool in order to produce a product having a three-dimensional shape.

The above-mentioned mock-up method is disadvantageous in that it is difficult to form a precise shape and takes a long time, although the manufacturing cost is low.

In addition, although the cutting method using a machine tool can produce a precise product, it takes a lot of manufacturing cost and has a disadvantage in that there is a restriction on a shape that can be machined.

In recent years, 3D printers that print and produce three-dimensional shaped products using 3D drawing data by three-dimensional modeling have been widely used.

The above-described 3D printer produces a three-dimensional molded article using materials such as polymers and metals in the form of liquid or powder, according to the 3D drawing data of the three-dimensional shape.

The use of the 3D printer has the advantages that manufacturing cost and manufacturing time can be greatly shortened, personalized manufacturing is possible, and a complicated three-dimensional shape can be easily manufactured.

Accordingly, it is possible to easily modify the shape when manufacturing the actual product, and it is possible to reduce the production cost, material cost, and labor cost.

3D printers with the above advantages are used in various fields such as automobile, aviation, architecture, medical care, home appliances, and toys.

The 3D printer includes a SLA (Stereo Lithography Apparatus) system in which a scanned portion is cured by scanning a photo-curable resin with a laser, a DLP (Digital Light Processing) system in which light is irradiated to a lower portion of a storage tank storing a photo- LCD system in which resin molded products are laminated on top of a build plate using a UV light source and an LCD panel, SLS (Selective Laser Sintering) system in which a functional polymer or metal powder is used for sintering, FDM (Fused Deposition Modeling) method, DMT (Laser-assist Direct Metal Tooling) method in which a metal is directly molded by a high-power laser beam, and Laminated Object Manufacturing (LOM) method.

In SLA, DLP, and LCD systems using photo-curing resin, the desired strength and color can be obtained by preparing a molded product, washing it, and then performing a separate curing process.

The apparatus used in the post-curing process is generally referred to as a post-curing unit. Examples of the post-curing unit include a UV curing unit and a post-curing unit using a UV LED (Light Emitting Diode).

Since the post-curing machine using the UV lamp has a problem of durability, a post-curing machine of the UV LED type has been used in recent years.

The after-curing unit of the UV LED system has a disadvantage that it is required to form the inside of the curing chamber at a high temperature, although the durability is excellent.

1 shows an example of a conventional post-curing machine using a UV LED.

The conventional post-curing machine 100 shown in FIG. 1 has a molded product W placed in a rectangular curing chamber 110, and then cures the molded product W by an LED light source 120.

However, in the conventional post-curing machine 100, since the curing chamber 110 is formed in a square or cylindrical shape, it is difficult to uniformly maintain the temperature inside the curing chamber 110.

That is, a temperature difference occurs between the center portion and the edge portion of the curing chamber 120, and it becomes difficult to heat and harden the molded article W uniformly.

In order to solve such a problem, there is a method of disposing a plurality of LED light sources 120 at various positions in the curing chamber 120 to vary the heating temperature of each LED light source.

However, if a plurality of LED light sources 120 are disposed at various positions within the curing chamber 110 and the heating temperature is changed, there is a problem that the configuration of the curing mechanism and the circuit becomes complicated.

KR 10-2017-0057002 A KR 10-2016-0055117 A KR 10-1647800 B1

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to uniformly cure a molded article placed in a hardening chamber while arranging a single LED light source in a hardening chamber.

Another object of the present invention is to increase the reflectance of the LED light in the curing chamber and shorten the curing time of the molded article.

It is yet another object of the present invention to improve the quality of a product by allowing the molded product to be uniformly cured in the curing chamber.

Another object of the present invention is to simplify the structure of the curing mechanism and circuit in a post-curing machine using an LED light source.

In order to attain the above object, the present invention provides a post-curing machine for a 3D printing product, which is configured to produce a molded article by a 3D printer using a photocurable resin and then cure the molded article by an LED light source, A first curing chamber formed in a half hemispherical shape in an inner space of the main body and having an LED light source on an upper portion of the first curing chamber, And a second curing chamber formed in a hemispherical shape on the inner side of the door so that the second curing chamber is coupled to the first curing chamber by closing the door to form a hemispherical curing chamber. do.

Further, the cross section of the main body is elliptical, and the cross section of the door has a curved shape corresponding to the main body.

And an aluminum coating layer is further formed on inner curved surfaces of the first curing chamber and the second curing chamber.

In addition, the lower portion of the curing chamber is formed in a circular shape, and a gentle conical protrusion is formed at its center portion, and a transparent plate is provided on the protrusion.

A protrusion is formed on an upper portion of the first curing chamber, a coupling groove is formed in the second curing chamber, and the first curing chamber and the second curing chamber are assembled by coupling the protrusion and the coupling groove .

And a plurality of embossed portions are formed on inner curved surfaces of the first curing chamber and the second curing chamber.

According to the present invention, a hemispherical curing chamber coated with aluminum on the inner curved surface provides an effect of uniformly curing a molded product placed in the curing chamber even with a single LED light source.

Further, since the molded article is uniformly cured in the hardening chamber, the quality of the product can be improved.

In addition, the hemispherical curing chamber and the conical protrusion have the effect of increasing the reflectance of the LED light and shortening the curing time.

In addition, since the hemispherical curing chamber is formed in the inner space of the main body only when the door is closed, there is an effect that the operation of housing the molded product in the curing chamber becomes very simple.

Further, the post-curing machine using the LED light source can simplify the structure of the curing mechanism and the circuit, and the device can be downsized.

1 is a front sectional view schematically showing a post-curing machine according to the prior art;
2 is a front sectional view of a post curing apparatus according to the first embodiment of the present invention.
3 is a perspective view of a post-curing machine according to a first embodiment of the present invention.
4 is a plan view of the post-curing unit according to the first embodiment of the present invention.
5 is a view for explaining a configuration of a curing chamber of a post-curing machine according to a first embodiment of the present invention.
6 is a partial front sectional view of a post curing apparatus according to a second embodiment of the present invention.

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

≪ Embodiment 1 >

As shown in FIGS. 2 to 5, the post-curing apparatus according to the first embodiment of the present invention is a post curing apparatus in which a molded product is manufactured by a 3D printer using a photocurable resin, and then the molded product is cured by an LED light source In the post-curing machine of the printing product, the post-curing machine 10 includes a main body 10a having an internal space 11 and a door 10b coupled to the main body 10a.

The main body 10a and the door 10b are configured to be openable and closable by a hinge member 17.

A first curing chamber 12a having a half hemispherical shape is provided in the inner space 11 of the main body 10a and an LED light source 13a is provided at an upper portion of the first curing chamber 12a. And a second curing chamber 12b having a half hemispherical shape is provided on the inner side of the door 10b.

As the LED light source 13, it is preferable to use a UV LED, but the present invention is not limited thereto.

Although the LED light source 13 is shown as one in FIG. 2, the LED light source 13 may be further formed.

Also, the cross section of the main body 10a is elliptical, and the cross section of the door 10b is curved to correspond to the main body 10a.

According to the above structure, when the door 10b is closed, the second curing chamber 12b is coupled to the first curing chamber 12a to form a hemispherical curing chamber 12.

That is, according to the present invention, as shown in FIG. 3 and FIG. 4, the body 10a is provided with a half of the hemispherical curing chamber, and the other half of the hemispherical curing chamber is provided inside the door 10b having an elliptical cross- And then combine them to form a hemispherical curing chamber 12.

That is, since the inside of the curing chamber 12 is formed in a hemispherical shape, the light emitted from the LED light source 13 is irregularly reflected to increase the reflectance.

Accordingly, the temperature inside the curing chamber 12 can be kept constant over the entire space, and the molded article W can be quickly and uniformly cured by the single LED light source 13.

5, a projection 12d is formed on the upper portion of the first curing chamber 12a and a coupling groove 12c is formed in the second curing chamber 12b.

With the above structure, the hemispherical curing chamber 12 can be formed by fitting the engaging groove 12c into the projection 12d.

That is, when the door 10b is closed and the engaging groove 12c and the protrusion 12d are coupled to each other, a sealed hemispherical curing chamber 12 is formed as shown in FIG.

Further, it is preferable that an aluminum coating layer is further formed on inner curved surfaces of the first curing chamber 12a and the second curing chamber 12b.

According to the aluminum coating layer, the reflectivity of the LED light can be further increased.

However, the present invention is not limited thereto, and it is also possible to coat a metal other than aluminum.

Also, as shown in FIG. 2, the lower portion of the curing chamber 12 is circular, and a gentle conical protrusion 14 is formed at the center thereof.

By the above-described structure, the light emitted from the LED light source 13 can be further dispersed.

The present invention further includes a transparent plate 15 for transmitting the LED light while allowing the molded product W to be seated on the conical protrusion 14.

The transparent plate 15 allows the LED light to pass through the transparent plate 15 to reach the lower portion of the curing chamber 12.

The transparent plate 15 is formed in a circular shape, and as shown in FIG. 2, a leg portion 15a is provided at a lower portion thereof.

The molded product W can be easily stored in the curing chamber 12 by the transparent plate 15 described above.

That is, when the transparent plate 15 is taken out, the molded product W is placed on the transparent plate 15, the molded product W is placed in the curing chamber 12, and then the door 10b is closed, ).

Further, after the curing is completed, the door 10b may be opened and the molded article W may be taken out immediately.

Hereinafter, a process of curing a molded product by the post-curing machine according to the present invention will be described.

The door 10b is first opened to take out the transparent plate 15 to the outside of the main body 10a and then the molded product W is placed on the transparent plate 15. [

5, when the transparent plate 15 on which the molded product W is placed is placed in the lower part of the inner space 11 of the main body 10a and then the door 10b is closed, A separate hemispherical curing chamber 12 is formed.

Subsequently, when the operation switch 16 provided in the main body 10a is operated, light is emitted from the LED light source 13 to start curing of the molded article W.

After completion of curing of the molded article W after a lapse of a predetermined time, the molded article W may be taken out of the main body 10a by opening the door 10b.

In SLA, DLP, and LCD systems that use 3D printing using photocurable resin, after the molded product W is manufactured, it is washed and then post-cured to obtain desired strength and color.

However, according to the conventional post-curing machine in which the UV LED is used to cure a molded article, since the curing chamber is formed in a quadrangular or cylindrical shape, it is difficult to maintain a uniform temperature throughout the entire space inside the curing chamber.

That is, in the conventional post-curing machine, temperature deviation occurs between the central portion and the edge portion of the quadrangular or cylindrical curing chamber, so it is difficult to uniformly heat the molded article to uniformly cure it.

And thus it is pointed out that it is not suitable for curing a precise molded article.

In order to solve this problem, there is a method of uniformly maintaining the temperature inside the heating chamber by arranging a plurality of LED light sources in various places inside the curing chamber and varying the heating temperature of each LED light source.

However, according to the above method, there arises a problem that the curing method and circuit configuration become complicated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and it is an object of the present invention to provide a curing chamber of a hemispherical shape in which an aluminum coating layer is formed to uniformly heat and uniformly heat a molded product W while using a single LED light source 13 There is that feature.

The conical projection 14 provided under the hardening chamber 12 can increase the dispersion ratio of the LED light and allow the LED light to reach the lower portion of the heating chamber 12 by the transparent plate 15 .

Accordingly, it is possible to maintain a constant temperature throughout the entire space of the heating chamber 12 by further increasing the reflectance by inducing irregular reflection of the LED light.

As a result, the molded article can be uniformly and quickly cured.

In addition, since the hemispherical curing chamber 12 is formed in the inner space 11 of the main body 10a only when the door 10b is closed, it can be particularly useful for curing a small precision molded product.

≪ Embodiment 2 >

Fig. 6 shows a second embodiment of the present invention.

The post curing apparatus according to the second embodiment of the present invention is characterized in that in the first embodiment described above, a plurality of embossed portions 18 are formed on the inner curved surfaces of the first curing chamber 12a and the second curing chamber 12b will be.

By the embossing section 18, the diffused reflection of the LED light can be diffused to further increase the reflectance.

Further, a plurality of recesses or a plurality of convex portions may be intermittently formed on the inner curved surfaces of the first curing chamber 12a and the second curing chamber 12b.

The other matters are the same as those in the first embodiment described above, so duplicate descriptions will be omitted.

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. It will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the present invention.

10: post-curing machine 10a:
10b: door 11: inner space
12: Curing chamber 12a: First curing chamber
12b: second curing chamber 12c: engaging groove
12d: projection 13: LED light source
14: protrusion 15: transparent plate
15a: leg portion 16: operation switch
17: hinge member 18: embossing unit
W: Molded products

Claims (6)

A post-curing machine for a 3D printing product for producing a molded article by a 3D printer using a photocurable resin and then curing the molded article by an LED light source,
The post-curing machine (10)
A main body 10a having an internal space 11 and a door 10b coupled to a side surface of the main body 10a in a hinged manner,
In the inner space 11 of the main body 10a, a first curing chamber 12a formed in a half hemispherical shape is provided,
A single LED light source 13 is provided on the first curing chamber 12a,
A second curing chamber 12b formed in a half hemispherical shape protrudes inward from the inside of the door on the inside of the door 10b,
When the door 10b is closed, the second curing chamber 12b is coupled to the first curing chamber 12a to form a hemispherical sealed curing chamber 12,
The flat surface of the main body 10a has an elliptical shape and the end surface of the door 10b has a curved shape corresponding to the main body 10a,
An aluminum coating layer is further formed on inner curved surfaces of the first curing chamber 12a and the second curing chamber 12b,
The lower portion of the curing chamber 12 is circular,
In the center of the curing chamber 12, a gentle conical protrusion 14 protrudes upward,
A circular transparent plate 15 having a leg portion 15a is detachably mounted on the upper portion of the protrusion 14 so that the molded product is seated on the transparent plate 15. [ Curing machine. delete delete delete The method according to claim 1,
A protrusion 12d is formed on the upper portion of the first curing chamber 12a and a coupling groove 12c is formed in the second curing chamber 12b,
Wherein the first curing chamber 12a and the second curing chamber 12b are assembled with each other by the engagement of the protrusion 12d and the engaging groove 12c to form the hemispherical curing chamber 12. [ Post curing machine. The method according to claim 1,
Wherein a plurality of embossed portions (18) are formed on inner curved surfaces of the first hardening chamber (12a) and the second hardening chamber (12b).

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