KR102481641B1 - Composite manufacturing method and composite manufactured thereby - Google Patents

Abstract

The method for manufacturing a composite according to the disclosed invention includes a first layer manufacturing step of forming a first layer in which a plurality of first and second members formed of different materials are alternately repeated in a first direction, and a plurality of first layers. The second layer manufacturing step of forming a second layer alternately repeated with the first and second members in a second direction intersecting the first direction, and the first and second layer manufacturing steps are alternately performed. It includes a repeating manufacturing step that is repeated at least once, and in the repeating manufacturing step, the first and second layers are repeatedly laminated so that the first and second members are interlocked with each other. According to this configuration, it is possible to manufacture a composite that is physically interlocked with each other, thereby providing high bonding strength.

Description

Composite manufacturing method and composite produced thereby {COMPOSITE MANUFACTURING METHOD AND COMPOSITE MANUFACTURED THEREBY}

The present invention relates to a composite manufacturing method and a composite manufactured thereby, and relates to a composite manufacturing method advantageous to various shape deformations and a composite manufactured thereby.

Composite surfaces can be fabricated using two different materials using FDM-type 3D printing technology. The composite prepared in this way requires flexibility such as bending and folding, as well as appropriate stiffness and conductivity, and can be applied to various products such as home appliances, wearable systems, sensors, satellites, and the like.

On the other hand, composite surfaces made of heterogeneous or multi-type printing materials have low bonding strength and easily separated defects due to differences in physical properties of each material. As a result, it provides a cause of defects when applied to product groups requiring free shape deformation, including rollable or bendable products.

Accordingly, in recent years, research on manufacturing a composite that is advantageous for shape deformation while increasing the bonding force between different materials is a trend that is continuously required.

Republic of Korea Patent Application No. 10-2013-0119251 Republic of Korea Patent Application No. 10-2019-0028907

An object of the present invention is to provide a method for manufacturing a composite having high bonding strength while being free to shape-transform.

Another object of the present invention is to provide a composite prepared by a method for producing a composite in which the above object is achieved.

A composite manufacturing method according to the present invention for achieving the above object is a first layer manufacturing step of forming a first layer in which a plurality of first and second members formed of different materials are alternately repeated in a first direction. , a second layer manufacturing step of forming a second layer alternately repeated with each other in a second direction crossing the plurality of first and second members with respect to the first direction, and manufacturing the first and second layers and a repeating manufacturing step of alternately repeating the steps at least once, and in the repeating manufacturing step, the first and second layers are repeatedly laminated so that the first and second members are interlocked with each other.

In addition, in the manufacturing step of the first and second layers, the first and second members may be formed using a 3D printer of a Fused Deposition Modeling (FDM) method.

In addition, in the first and second layer manufacturing steps, after sequentially forming a plurality of the first members side by side so as to be spaced apart from each other, the second members are spaced apart from each other at an interval between the plurality of first members. A plurality of them can be formed side by side and sequentially.

In addition, the first and second members may have a width of 100 um or more and a thickness of 100 um or more.

In addition, before the first layer manufacturing step, a base manufacturing step of forming a plate-shaped base on which the first and second layers are to be laminated, and after the repeated manufacturing step, the first and second layers are made of a material different from that of the base. A cover manufacturing step of forming a cover covering the second member in the surface direction may be further included.

In addition, the base may be formed of the same material as any one of the first and second members, or may be formed of a material different from that of the first and second members, and the cover may be formed of the same or different material from the base. there is.

In addition, the first member may be made of a rigid material having rigidity, and the second member may be made of a flexible material having flexibility.

In addition, at least one of the first and second members may be provided with a rigid material containing PLA (Poly Lactic Acid).

In addition, at least one of the first and second members may be provided with a flexible material including TPU (Temperature polyurethane).

Also, at least one of the first and second members may be made of a conductive material.

The composite according to a preferred embodiment of the present invention, a plurality of first members provided with a first material so as to be spaced apart from each other and provided at spaced intervals between the plurality of first members to be spaced apart from each other and arranged in parallel It includes a plurality of second members made of a second material different from the member, wherein the plurality of first and second members are repeatedly stacked in a first direction and in a second direction crossing the first direction, thereby interlocking each other. (Interlocking).

In addition, the plurality of first and second members may be multi-layered and formed using a 3D printer of a fused deposition modeling (FDM) method.

In addition, the first and second members may have a width of 100 um or more and a thickness of 100 um or more.

In addition, the first and second members are laminated in the plane direction with respect to the base and covered in the plane direction by the cover, and the base and the cover are each different from each other with at least one of the first and second materials, or It may be provided identically, or may be provided with a third material different from the first and second materials.

In addition, the first and second materials may be provided with a flexible material including at least one of a rigid material including poly lactic acid (PLA), a temperature polyurethane (TPU), and a conductive material.

According to the present invention having the configuration as described above, first, since the first and second members made of different or multi-type materials are coupled to each other in an interlocking structure, a high bonding force advantageous to shape deformation can be secured.

Second, compared to conventional chemical bonding methods, it is possible to provide a high dry physical bonding force between different materials, providing a high-quality composite that is advantageous for various shape deformations such as bending, folding, or twisting.

Third, it is advantageous to manufacture a composite corresponding to various shapes and conditions by manufacturing a composite by 3D printing, which is easy to change the design. In addition, the manufacturing process is simple, and it is possible to manufacture an economical and environmentally friendly composite.

Fourth, since the composite is made of heterogeneous or multi-type materials having different characteristics, it is advantageous to secure use diversity.

1 is a flow chart schematically showing a composite manufacturing method according to a preferred embodiment of the present invention.
Figure 2 is a view schematically showing each step corresponding to the composite manufacturing method shown in Figure 1 in sequence.
3 is a view schematically showing a composite manufactured by the composite manufacturing method shown in FIG.
4 is a diagram schematically comparing a conventional composite and a composite according to the present invention.
Figure 5 is a schematic diagram for explaining the bending performance of the composite produced by the composite manufacturing method shown in Figure 1.
FIG. 6 is a view schematically showing the bendable and rollable states of the composite prepared by the composite manufacturing method shown in FIG. 1;
FIG. 7 is a schematic diagram for comparing conductivity in a shape-deformed state of a composite manufactured by the composite manufacturing method shown in FIG. 1 .
Figure 8 is a schematic diagram for explaining the surface rolling performance of the composite produced by the composite manufacturing method shown in Figure 1. And,
FIG. 9 is a schematic diagram for explaining a pattern arrangement structure using a composite manufactured by the composite manufacturing method shown in FIG. 1 .

Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. However, the spirit of the present invention is not limited to such embodiments, and the spirit of the present invention may be proposed differently by adding, changing, and deleting components constituting the embodiments, but this is also included in the spirit of the present invention. It will be.

1 and 2, the manufacturing method (1) of a composite according to a preferred embodiment of the present invention includes a base manufacturing step (10), a first layer manufacturing step (20), and a second layer manufacturing step (30). , iterative manufacturing step (40) and cover manufacturing step (50).

For reference, the manufacturing method 1 of the composite described in the present invention is for manufacturing a composite 100 (see FIG. 3) having a multi-layer structure formed of different first and second materials, and is limited to the illustrated shape. It doesn't work.

Base manufacturing step 10, as shown in Figure 2 (a), to form a plate-shaped base (B) of the first material. The base (B) is a pedestal for supporting the multilayer structure of the composite 100, and has a predetermined width and height. The shape of the base (B) is not limited to the shape of the rectangular plate shown in FIG.

In the first layer manufacturing step 20, as shown in (b) to (d) of FIG. 2, the first member M1 made of the first material and the second member M2 made of the second material are moved in the first direction. A first layer is formed which is repeated alternately with each other. In this first layer manufacturing step 20, first, as shown in (b) and (c) of FIG. 2, a plurality of first members M1 formed of a first material are formed on a base to have a shape extending in the longitudinal direction ( B) is laminated to form. At this time, the plurality of first members M1 are spaced apart at predetermined intervals so as to be parallel to each other in the first direction.

After that, as shown in (d) of FIG. 2, second members M2 extending in the longitudinal direction are formed of a second material at intervals between the plurality of first members M1. Therefore, the first layer is formed by manufacturing the first and second members M1 and M2 alternately and repeatedly. Here, it is preferable that the first and second members M1 and M2 have the same width and height, and have the same spaced distance. Therefore, the first and second members M1 and M2 are alternately brought into close contact with each other, thereby forming a flat first layer.

For reference, the first material forming the first member M1 described in the present invention includes a material having rigidity, and the second material includes a flexible material. More preferably, at least one of the first and second materials may be provided with a rigid material including PLA (Poly Lactic Acid), and the other may be provided with a flexible material including TPU (Temperature polyurethane). In addition, according to the purpose of use of the manufactured composite 100, at least one of the first and second materials may be provided with a conductive material.

In this embodiment, it is exemplified that the first member M1 is made of a first material including PLA and the second member M2 is made of a second material including TPU, but this is not a limitation. That is, the first member M1 may be made of any one of various materials having rigidity, and the second member M2 may be made of any one of flexible or conductive materials. Alternatively, various modified embodiments are possible, such as that both the first and second members M1 and M2 are made of a flexible material and further include a third member (not shown) having rigidity.

Also, the first and second members M1 and M2 may be manufactured by a 3D printer. More preferably, it can be manufactured by a 3D printer of FDM (Fused Deposition Modeling) method, which is one of the modeling techniques of heating and extruding a thermoplastic material to stack one layer at a time.

In the second layer manufacturing step 30, as shown in (e) and (f) of FIG. 2, the first and second members M1 and M2 are alternately intersected with each other in a second direction crossing the first direction. Form a repeated second layer. More specifically, in the second layer manufacturing step 30, as shown in FIG. As shown in (f) of FIG. 2, a plurality of second members M2 are manufactured side by side so as to be spaced apart from each other in the interval between the plurality of first members M1.

Similar to the above-described first layer manufacturing step 20, the second layer manufacturing step 30 may be manufactured by an FDM-type 3D printer that laminates the first and second materials, respectively. That is, the second layer manufacturing step 30 differs from the first layer manufacturing step 20 only in a manufacturing direction, and the second layer is manufactured in the same manner as the first layer manufacturing step 20.

In the iterative manufacturing step 40, the first and second layer manufacturing steps 20 and 30 are alternately and repeatedly manufactured. In this iterative manufacturing step 40, as shown in (g) and (h) of FIG. 2, a plurality of first and second members M1 and M2 are stacked in first and second directions that cross each other. The number of repetitions of the repeated manufacturing step 40 is not limited to the illustration of FIG. 2 and can be variously varied depending on the conditions of the composite 100 to be manufactured.

On the other hand, as the first and second members M1 and M2 are repeatedly manufactured in the first and second directions in the iterative manufacturing step 40, the first and second layers are formed by repeating the first and second layers. And the second member (M1) (M2) is mutually interlocked (Interlocking). That is, it is possible to form an interlocking coupling structure between the first and second members M1 and M2 made of different first and second materials through 3D printing. As a result, the composite 100 composed of different or multi-type materials is bonded to the first and second members M1 and M2 by physical bonding, which is a dry bonding method rather than chemical bonding, so that the composite having high bonding strength ( 100) can be prepared.

For reference, the stacking direction and angle of the first and second members M1 and M2 interlocked with each other do not affect the surface binding force of the composite 100 to be manufactured. Accordingly, the stacking directions and angles of the first and second members M1 and M2 are not limited to the illustrated example, and may be variously modified according to manufacturing conditions and use conditions.

In the cover manufacturing step 50, a cover C covering the first and second members M1 and M2 in the surface direction is formed. That is, in the cover manufacturing step 50, as shown in (i) of FIG. 2, a plate-shaped cover C for covering the first and second members M1 and M2 in the plane direction is manufactured and laminated.

On the other hand, the cover manufacturing step 50 is preferably made of a material different from the base (B), in this embodiment, the base (B) is made of a first material, the cover (C) is made of a second material exemplify that However, it is not necessarily limited thereto, and the base (B) may be formed of any one of the first and second materials or may be formed of a third material different from the first and second materials, and the cover (C) may be formed of the base (B). ) Various embodiments formed of different or the same material are possible.

The composite 100 prepared as above is shown in FIG. 3. As shown in FIG. 3 , the composite 100 has high bonding strength because the first and second members M1 and M2 are physically coupled to each other by the interlocking structure. FDM-type 3D printers for manufacturing these first and second members M1 and M2 are inexpensive, and PLA, ABS (Acrylonitrile Butadiene Styrene copolymer), TPU, TPE (Thermoplastic Elastomer), PET (Polyethylene Terephthalate) , PETG (Glycolmodified Polyethylene Terephthalate), PC (Polycarbonate), Nylon (Nylon), ASA (Acrylic Styrene Acrylonitrile), ULTEM, SLA, etc. can be applied. Here, the thermoplastic material that can be employed as the first and second materials is preferably an inexpensive and environmentally friendly material.

Accordingly, by manufacturing the composite 100 using a 3D printer, the manufacturing speed is fast, and a special environment for manufacturing and additional equipment are not required. In addition, due to simple manufacturing steps that do not require additional manufacturing processes, it is possible to easily manufacture the surface of the composite 100 having a high binding force capable of multifunctionality.

In addition, the first and second members M1 and M2 constituting the composite 100 having an interlocking structure may have a width of 100 um or more and a thickness of 100 um or more by a 3D printer. Here, the binding force between the first and second members M1 and M2 made of different materials, that is, the first and second materials, is greater than 100 μm when the width of the first and second members M1 and M2 is 100 μm or more. You can check the bonding strength from, and it has excellent bonding strength at 500um or more.

For reference, the total thickness of the composite 100 produced by the 3D printer can also be adjusted in various ways according to the conditions of use, and the total thickness can be adjusted to about 400um thin.

Referring to FIG. 4, a drawing comparing the composite 100 according to the present invention with the conventional one is schematically shown. Here, FIG. 4 (a) is a schematic diagram of a conventional composite manufactured by a conventional method, and FIG. 4 (b) is a composite manufacturing method (1) according to the present invention. It is a schematic view of the manufactured composite 100.

As shown in (a) of FIG. 4, since a flat surface is provided between the first and second members M1 and M2, an interlocking structure is not formed. In this way, when the first and second members M1 and M2 are provided in a flat plane without any coupling structure, a separate adhesive is provided between the first and second members M1 and M2 to chemically bond them. can make it

However, when an adhesive is provided between the first and second members M1 and M2, the first and second members M1 and M2 are separated from each other with greater force than the adhesive, so that they can be easily separated. In addition, there is a problem in that physical properties of the first and second members M1 and M2 are varied due to chemical adhesion between the first and second members M1 and M2.

On the other hand, in the case of the composite 100 according to the present invention as shown in (b) of FIG. 4, it can be confirmed that the first and second members M1 and M2 are physically coupled to each other by an interlocking structure. In the composite 100 according to the present invention, since the first and second members M1 and M2 can secure physical interlocking bonding strength, they can have high bonding strength.

For reference, in (b) of FIG. 4, the first and second members M1 and M2 are shown as having a three-layer structure in order to be coupled to each other in an interlocking structure. In addition, the base (B) and the cover (C) made of the first and second materials respectively corresponding to the first and second members (M1) (M2) have a three-layer structure of the first and second members (M1) ( M2) is in a mutually coupled state with the interlocking bonding layer interposed therebetween.

5 is a schematic diagram for explaining the bending performance of the composite 100 having an interlocking structure according to the present invention. In (a) of FIG. 5, a state in which the composite 100 is bent is schematically shown, and in (b) of FIG. 5, a state in which the composite 100 is unbended is schematically shown.

As shown in FIG. 5, the first member M1 made of a first material including PLA having rigidity has an interlocking structure with the second member M2 made of a second material made of a flexible material including TPU. By being combined, the composite 100 can flexibly bend while having rigidity. If the composite 100 is prepared only from PLA, due to the characteristics of a rigid material, the composite 100 may bend and break, but the composite 100 according to the present invention has both rigidity and flexibility, so it does not break .

6 is a view schematically showing the bendable and rollable states of the composite 100 according to the present invention. The composite 100 shown in FIG. 6 has a total height of 400 um, and in (a) of FIG. . As shown in FIG. 6 , the composite 100 is provided with an interlocking structure having both rigidity and flexibility, so that both bending and rolling are possible.

7 is a schematic diagram for comparing the conductivity of the composite 100 according to the present invention in a shape-deformed state. As shown in (a) of FIG. 7, it is confirmed that the lamp electrically connected to both ends of the composite 100 is turned on, and conductivity can be confirmed. As shown in (b), (c) and (d) of FIG. 7, the composite 100 shows that the conductive performance is maintained even when the shape is deformed in bending, folding, and twisting states. You can check it by turning it on.

Figure 8 is a schematic diagram for explaining the surface rolling performance according to the shape of the composite 100 according to the present invention. As shown in FIG. 8 , in manufacturing the first and second materials each made of a first material having rigidity and a second material having flexibility, a layer (e.g., a base) made of a first member M1 made of a rigid material ) may be formed in plurality at regular intervals. In this case, as the plurality of first members M1 spaced apart by the distance of the plurality of first members M1 provided at regular intervals with a rigid material are rolled, they may be rolled with a polygonal cross section as shown in FIG. 8 .

At this time, as an interlocking structure is provided between the first and second members M1 and M2, even if the first member M1 is rolled at regular intervals, the gap between the first and second members M1 and M2 It can be seen that the binding force of is not released.

9 is schematically illustrated to explain a pattern arrangement structure utilizing the composite 100 according to the present invention. As shown in FIG. 9 , by forming a predetermined pattern on the surface of the composite 100 having an interlocking structure, the composite 100 deformable into a desired deformable shape can be provided. Although FIG. 9 shows a foldable structure by providing a first member M1, which is a rigid material, in a polygonal shape, the shape of the composite 100 can be varied in various ways.

As described above, the composite 100 described in the present invention is laminated so that the first and second members M1 and M2 made of different or multi-type materials are interlocked by 3D printing. As a result, the multi-layered structure composed of the first and second members M1 and M2 can be coupled to each other with high physical bonding force. In addition, it is possible to provide a composite 100 having a simple, inexpensive and high binding force using a 3D printer, so that the composite 100 can be manufactured in various shapes corresponding to desired conditions of use to improve usability.

As described above, although it has been described with reference to the preferred embodiments of the present invention, those skilled in the art will variously modify and change the present invention within the scope not departing from the spirit and scope of the present invention described in the claims below. You will understand that it can be done.

100: complex
M1: first member
M2: Second member
B: Base
C: cover

Claims (16)

a first layer manufacturing step of forming a first layer in which a plurality of first and second members formed of different materials are alternately repeated in a first direction;
a second layer manufacturing step of forming a second layer alternately repeated with each other in a second direction intersecting the first direction with respect to the plurality of first and second members; and
a repetition manufacturing step of alternately repeating the first and second layer manufacturing steps at least once;
Including,
In the repeated manufacturing step, the first and second layers are repeatedly laminated so that the first and second members are interlocked with each other,
The first member is made of a rigid material having rigidity, and the second member is made of a flexible material having flexibility,
Wherein the first layer and the second layer are deformed into a desired shape while being rolled or folded according to the arrangement pattern of the first member formed on the first layer and the second layer. According to claim 1,
The first and second layer manufacturing steps are a method of manufacturing a composite of forming the first and second members using a 3D printer of a Fused Deposition Modeling (FDM) method. According to claim 1,
The first and second layer manufacturing steps,
After sequentially forming a plurality of the first members side by side so as to be spaced apart from each other, a plurality of second members are sequentially formed side by side so as to be spaced apart from each other in the spaced intervals between the plurality of first members Manufacturing method of a composite. According to claim 1,
The first and second members have a width of 100 um or more, and a method for producing a composite having a thickness of 100 um or more. According to claim 1,
a base manufacturing step of forming a plate-shaped base on which the first and second layers are to be stacked before the first layer manufacturing step; and
After the repeated manufacturing step, a cover manufacturing step of forming a cover covering the first and second members in a surface direction with a material different from that of the base;
Method for producing a composite further comprising a. According to claim 5,
The base is formed of the same material as any one of the first and second members, or formed of a material different from that of the first and second members,
The cover is a method of manufacturing a composite formed of the same or different material as the base. delete According to claim 1,
The first member is a method of manufacturing a composite provided with a rigid material containing PLA (Poly Lactic Acid). According to claim 1,
The second member is a method of manufacturing a composite provided with a flexible material including TPU (Temperature polyurethane). According to claim 1,
At least one of the first and second members is a method of manufacturing a composite provided with a conductive material. A composite produced by the method for producing a composite according to any one of claims 1 to 6, 8, 9 and 10. a plurality of first members made of a first material so as to be spaced apart from each other; and
a plurality of second members provided at spaced apart intervals between the plurality of first members and made of a second material different from the first member so as to be spaced apart from each other;
Including,
The plurality of first and second members form a first layer that is alternately repeated in a first direction, and the plurality of first and second members form a first layer in a second direction crossing the first direction. forming an alternately repeated second layer;
The first and second layers are repeatedly laminated so that the first and second members are interlocked with each other,
The first member is made of a rigid material having rigidity, and the second member is made of a flexible material having flexibility,
The first layer and the second layer are deformed into a desired shape while being rolled or folded according to an arrangement pattern of the first member formed on the first layer and the second layer. According to claim 12,
The plurality of first and second members are composites formed by multi-layer stacking using a 3D printer of a fused deposition modeling (FDM) method. According to claim 12,
The first and second members have a width of 100 um or more and a thickness of 100 um or more. According to claim 12,
The first and second members are laminated in the plane direction with respect to the base and covered in the plane direction by the cover,
The base and the cover are provided with at least one material different from or identical to each other from among the first and second materials, or a third material different from the first and second materials. According to claim 12,
The first material is provided with a rigid material containing PLA (Poly Lactic Acid),
The second material is a composite made of a flexible material including TPU (Temperature polyurethane).

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