KR20160125750A - Sandwich panel and method of manufacturing the same - Google Patents

Sandwich panel and method of manufacturing the same Download PDF

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Publication number
KR20160125750A
KR20160125750A KR1020150056610A KR20150056610A KR20160125750A KR 20160125750 A KR20160125750 A KR 20160125750A KR 1020150056610 A KR1020150056610 A KR 1020150056610A KR 20150056610 A KR20150056610 A KR 20150056610A KR 20160125750 A KR20160125750 A KR 20160125750A
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KR
South Korea
Prior art keywords
core portion
core
metal
structural member
sandwich panel
Prior art date
Application number
KR1020150056610A
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Korean (ko)
Other versions
KR101777602B1 (en
Inventor
안병찬
김성호
이필승
정현
한순흥
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국방과학연구소
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Priority to KR1020150056610A priority Critical patent/KR101777602B1/en
Publication of KR20160125750A publication Critical patent/KR20160125750A/en
Application granted granted Critical
Publication of KR101777602B1 publication Critical patent/KR101777602B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/28—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material

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  • Laminated Bodies (AREA)

Abstract

The present invention includes a core portion formed to absorb a load applied by deformation and a reinforcing portion formed to cover at least a portion of the surface of the core portion so as to at least partially cover the core portion and to resist deformation of the core portion The present invention provides a sandwich panel,

Description

≪ Desc / Clms Page number 1 > SANDWICH PANEL AND METHOD OF MANUFACTURING THE SAME &

The present invention relates to a sandwich panel having a metal material therein and a method of manufacturing the same.

Sandwich panels with honeycomb, corrugated cardboard, Z or ⊥ shaped cores are generally used as sacrificial members for shock absorption. However, in this case, the intended energy absorption performance is exhibited only when the direction of the impact load is perpendicular to the sandwich panel, and the strength of the sandwich panel is correspondingly lowered when the impact load is changed in the other direction.

In addition, although a sandwich panel having foamed aluminum foam as a core has been developed in the past, in such a case, since it is necessary to use a considerably thick foam panel in order to absorb a strong impact such as an explosion, It has disadvantages.

Therefore, development of a panel having sufficient energy absorption capacity even when an impact load is generated in a direction perpendicular to the sandwich panel, and which does not significantly increase the volume and weight as compared with the conventional sandwich panel can be considered.

The present invention is to provide a sandwich panel which is formed so as to effectively absorb an impact load in any direction other than a specific direction and which does not significantly increase the volume and weight.

According to an aspect of the present invention, there is provided a sandwich panel including: a core portion formed to absorb a load applied by deformation; And a reinforcing portion formed to at least partially surround the surface of the core portion to resist deformation.

According to an example of the present invention, the reinforcing portion may include a plurality of hollow portions to increase an elastic force for absorbing a transmitted impact.

In addition, the core portion may include a through-hole through which the reinforcing portion is formed so that the reinforcing portion can be formed continuously.

The inner structural member may further include a surface portion formed to cover at least one surface of the inner structural member to protect the inner structural member made of the core portion and the reinforcing portion from the external environment.

In addition, the internal structural members may be provided in a plurality of stacked layers, and each of the internal structural members may have the core portion having the same or different shape.

In addition, the core portion may have a honeycomb, rectangular, or I-shaped column repeatedly arranged.

In addition, the core portion may have a rectangular or triangular shape in which irregularities are repeatedly arranged.

The core portion may be configured such that a truss lattice of a pyramid shape is repeatedly arranged.

The apparatus may further include an adhesive member disposed between the internal structural member and the surface portion and configured to fix the internal structural member and the surface portion to each other.

On the other hand, in order to realize the above-mentioned problem, the present invention proposes a manufacturing method of a sandwich panel. The manufacturing method of the sandwich panel includes a first step of dissolving a metal ingot, a second step of foaming the metal by adding a blowing agent and a thickener to the metal dissolved in the first step, A third step of inserting a core part having a through hole through which the metal foamed in the second step is passed into a flask and injecting the foamed metal into the flask to cool the core part; And a fourth step of bonding a surface portion covering and protecting at least one surface of the internal structural member made of the metal of the foamed metal.

The sandwich panel of the present invention includes a core portion absorbing a load applied by deformation and a reinforcing portion formed of a metallic material and configured to surround the core portion so that when the impact is applied, the reinforcing portion resists deformation of the core portion, The energy can be absorbed more efficiently.

The sandwich panel of the present invention is capable of absorbing energy applied in a state of not greatly increasing the volume and weight by a plurality of hollow portions provided in the reinforcing portion, Impact energy applied in the direction can also be effectively absorbed.

In the sandwich panel of the present invention, since the metallic material constituting the reinforcing portion can be continuously formed by the through holes formed in the core portion, the strength against the impact applied is improved, and the strength against the deformation of the core portion can be more effectively .

1 is a conceptual view showing a cross section of a sandwich panel according to an embodiment of the present invention;
FIG. 2 is a conceptual view showing another embodiment of the sandwich panel shown in FIG. 1. FIG.
3 is a conceptual view showing another embodiment of the sandwich panel shown in Fig.
FIG. 4 is a conceptual view showing another embodiment of the core portion shown in FIG. 1. FIG.
5 is a flowchart illustrating a method of manufacturing a sandwich panel according to an embodiment of the present invention.
6 is a conceptual view showing the cooling process steps shown in Fig.

Hereinafter, a sandwich panel and a method of manufacturing the same according to the present invention will be described in detail with reference to the accompanying drawings. In the present specification, the same or similar reference numerals are given to different embodiments in the same or similar configurations. As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.

1 is a conceptual view showing a cross section of a sandwich panel 100 according to an embodiment of the present invention.

Referring to FIG. 1, the sandwich panel 100 includes a core 110 and a reinforcement 120.

The core portion 110 is formed so as to absorb a load applied by deformation such as plasticity and buckling. For example, the core 110 may have a plurality of pillars spaced apart from each other as shown in FIG.

The reinforcing portion 120 is formed to include at least a portion of the metallic material and is provided with a reinforcing portion 120 to resist deformation of the core portion 110 when a load such as an impact is applied to the core portion 110, And may be formed to cover at least a part of the surface of the core portion 110. For example, the metallic material may be aluminum (Al).

According to the present invention described above, when the impact is applied to the core portion 110 and the reinforcement portion 120, the reinforcement portion 120 supports the core portion 110, Can be effectively achieved.

Meanwhile, the reinforcing portion 120 may include a plurality of hollow portions (not shown).

The hollow portion may be formed in at least a part of the reinforcement portion 120 to increase the elastic force to absorb the impact energy indirectly transmitted through the core portion 110 or directly transmitted. For example, the reinforcing portion 120 may be made of a porous metal including a metal material. Accordingly, the volume and weight are not significantly increased by the plurality of hollow portions, and the energy generated when an impact is applied in an arbitrary direction other than the vertical direction of the sandwich panel 100 can be effectively absorbed. Further, the reinforcing portion 120 having the plurality of hollow portions has an effect of shielding electromagnetic waves.

In addition, the sandwich panel 100 may further include a surface portion 130.

1, the surface portion 130 includes an inner structural member S to protect the inner structural member S including the core portion 110 and the reinforcing portion 120 from external environment, that is, from contamination or moisture, As shown in FIG. Accordingly, the surface portion 130 of the sandwich panel 100 protects the internal structural member S from the external environment to prevent the phenomenon of erosion, moisture absorption, deterioration, and the like, So that the impact energy transmitted to the internal structural member S is reduced. Also, the surface portion 130 is shown to cover a part of the internal structural material S, but may be formed so as to cover the entire internal structural material S.

Further, the sandwich panel 100 may further include an adhesive member 140.

The adhesive member 140 may be disposed between the inner structural member S and the surface portion 130 as shown to fix the inner structural member S and the surface portion 130 to each other. For example, the adhesive member 140 may be made of an epoxy material.

According to the structure of the present invention as described above, the sandwich panel 100 has a structure in which the core portion 110 and the reinforcement portion 120 are resiliently deformed when a load such as an impact is applied, The reinforcing part 120 is provided with the plurality of hollow parts to increase the impact energy absorbing effect and not to increase its volume and weight.

Hereinafter, other embodiments of the sandwich panel 100 will be described with reference to Figs. 2 and 3. Fig.

FIG. 2 is a conceptual view showing another embodiment of the sandwich panel 100 shown in FIG. 1, and FIG. 3 is a conceptual view showing another embodiment of the sandwich panel 100 shown in FIG.

2, the sandwich panel 100 may be configured to have a corrugated core portion 110, as shown in FIG. 2 (a), and FIG. 2 the honeycomb-shaped core portion 110 may be formed to have a tetrahedron-shaped core portion 110 as shown in FIG. 2 (b) 110).

3, the sandwich panel 100 may include a plurality of internal structural members S including a core 110 and a reinforcement 120, and may be stacked on top of each other. Here, the internal structural members S may be configured to include the core portions 110 having the same or different shapes. For example, as shown in FIG. 3, the sandwich panel 100 has a structure in which the internal structural member S having the core portions 110 of the same shape as the A region and the B region, And they may be stacked on each other in a staggered state. Accordingly, the internal structural members S to be laminated are advantageous in that they can be made to complement each other in areas susceptible to impact.

3, the inner structural member 110 of the A region attached to the target structure O does not have the surface portion 130, and the inner structural member 110 of the B region exposed to the external environment has the surface (130).

Hereinafter, other embodiments of the core 110 will be described with reference to FIG.

4 is a conceptual view showing another embodiment of the core unit 110 shown in FIG.

Referring to FIG. 4, first, the core 110 may include a through-hole 112.

The through hole 112 may be formed to penetrate the reinforcing portion 120 as shown in FIG. 4 so that the reinforcing portion 120 can be continuously formed without breaking. As a result, the resistance against impact applied directly or indirectly to the reinforcing portion 120 is improved, and consequently the impact absorbing capacity of the sandwich panel 100 can be further improved.

4, the core 110 may have a honeycomb rectangular shape repeatedly arranged as shown in FIG. 4 (a), and FIG. 4 As shown in FIG. 4B, the I-shaped column may be repeatedly arranged, and the square-shaped irregularities may be repeatedly arranged as shown in FIG. 4C, the I-shaped column may be repeatedly arranged as shown in FIG. 4d, and the pyramid-shaped truss grid may be repeatedly arranged as shown in FIG. 4 (e) have.

Hereinafter, a method of manufacturing the sandwich panel 100 will be described in detail with reference to FIGS. 5 and 6. FIG.

FIG. 5 is a flowchart illustrating a method of manufacturing a sandwich panel 100 according to an embodiment of the present invention, and FIG. 6 is a conceptual view illustrating a cooling process step S300 shown in FIG.

Referring to FIGS. 5 and 6, the method for manufacturing the sandwich panel 100 includes a first step S100 of preparing a metal ingot and dissolving it. The dissolving of the metal raw material may be performed by applying a high temperature to the raw material.

Next, a second step (S200) of forming pores in the metal raw material dissolved in the first step (S100) is included. In the second step S200, a blowing agent and a thickener are added to the molten metal raw material. Here, the thickener means a material to be added for increasing the viscosity of the adhesive liquid in order to improve initial adhesion.

Next, a third step (S300) of injecting the metal (M) foamed in the second step (S200) into the flask and cooling the metal (M) is included. 6, a core 110 having a through-hole 112 formed to allow the foamed metal M to pass therethrough is inserted into a flask F, And the metal (M) foamed in the mold (F) is injected. The metal M supplied to the flask F can be cooled in a state that the metal M is entirely covered on the surface of the core portion 110 through the through hole 112.

Finally, there is provided a method for manufacturing a panel by joining a surface portion covering and protecting at least one surface of an internal structural member formed by joining a core portion 110 and the foamed metal M to the internal structural member Step S400.

However, the scope of the present invention is not limited to the configuration and method of the embodiments described above, and all or some of the embodiments may be selectively combined so that various modifications may be made to the embodiments. In addition, the present invention can be applied to all equivalents of inventions, such as inventions that can be modified, added, deleted, or replaced at the level of those skilled in the art, It belongs to the scope is self-evident.

100: sandwich panel 110: core part
120: reinforcement part 130: surface part
140:

Claims (10)

A core portion formed to absorb a load applied by deformation; And
And a reinforcing portion formed to cover at least a portion of the metal material and configured to at least partially surround the surface of the core portion to resist deformation of the core portion. The method according to claim 1,
Wherein the reinforcing portion includes a plurality of hollow portions to increase the elastic force for absorbing the transmitted impact. 3. The method of claim 2,
Wherein the core portion includes a through hole through which the reinforcing portion can be inserted so that the reinforcing portion can be continuously formed. The method of claim 3,
Further comprising a surface portion formed to cover at least one surface of the internal structural member to protect the internal structural member made of the core portion and the reinforcing portion from the external environment. 5. The method of claim 4,
Wherein the inner structural members are provided in a plurality of stacked layers, and each of the inner structural members has the core portion having the same or different shape. 6. The method of claim 5,
Wherein the core portion has a honeycomb, rectangular or I-shaped column repeatedly arranged. 6. The method of claim 5,
Wherein the core portion is formed such that a rectangular or triangular shape of irregularities is repeatedly arranged. 6. The method of claim 5,
Wherein the core portion is formed such that a truss lattice of a pyramid shape is repeatedly arranged. 6. The method of claim 5,
Further comprising an adhesive member disposed between the inner structural member and the surface portion and configured to fix the inner structural member and the surface portion to each other. A first step of dissolving a metal ingot;
A second step of foaming the metal by adding a blowing agent and a thickener to the metal dissolved in the first step;
A third step of inserting a core part having a through hole through which the metal foamed in the second step is passed into a flask, injecting the foamed metal into the flask and cooling the core part; And
And a fourth step of bonding a surface portion covering and protecting at least one surface of the internal structural member made of the core portion and the foamed metal in the third step.
KR1020150056610A 2015-04-22 2015-04-22 Shock absorbing sandwich panel and method of manufacturing the same KR101777602B1 (en)

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Application Number Priority Date Filing Date Title
KR1020150056610A KR101777602B1 (en) 2015-04-22 2015-04-22 Shock absorbing sandwich panel and method of manufacturing the same

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KR20160125750A true KR20160125750A (en) 2016-11-01
KR101777602B1 KR101777602B1 (en) 2017-09-13

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230032659A (en) * 2021-08-31 2023-03-07 서울대학교산학협력단 Variable Stiffness Structure with Sandwich Structure

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003213840A (en) 2002-01-25 2003-07-30 Matsubayashi Sangyo:Kk Plate and its manufacturing method
KR200385795Y1 (en) * 2005-03-18 2005-06-02 박병규 Fire prevention core structure
KR101219878B1 (en) 2010-12-29 2013-01-09 전남대학교산학협력단 Manufacturing method of sandwich panels with truss type cores

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230032659A (en) * 2021-08-31 2023-03-07 서울대학교산학협력단 Variable Stiffness Structure with Sandwich Structure

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