JP2022164592A - panel - Google Patents

Abstract

To provide a panel in which a panel strength can be increased while suppressing significant increase in panel weight.SOLUTION: A panel includes a core material and a face material. The core material includes a base material and a reinforcement material constituted of a material higher in strength than the base material. The base material and the reinforcement material are each bonded to the face material.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a panel that can be used as a luggage board or the like installed in the luggage compartment of a vehicle.

Patent Literature 1 discloses a panel configured by attaching a thin steel plate to a hollow plate.

JP-A-2016-7900

In Patent Document 1, the strength is increased by attaching a steel plate to the hollow plate, but the strength may still be insufficient. In order to increase the strength, the thickness of the steel plate should be increased, but in that case the weight of the panel will increase significantly.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and provides a panel capable of increasing the strength of the panel while suppressing a significant increase in panel weight.

According to the present invention, the following inventions are provided.
(1) A panel comprising a core material and a face material, wherein the core material comprises a base material and a reinforcing material made of a material having a higher strength than the base material, and the base material and the reinforcing material are each glued to said facing panel.
(2) In the panel according to (1), the base material and the reinforcing material are made of foam, and the expansion ratio of the foam constituting the reinforcing material is panel, which is lower than the foaming ratio of
(3) In the panel according to (1) or (2), the reinforcing member includes a column and flanges provided at one end or both ends of the column, and the flange is the face member A panel that is glued to.
(4) A method for manufacturing a panel, comprising a face material fixing step of bonding the face material to the core material by pressing the face material against the core material, wherein the core material and a base material A method according to claim 1, further comprising a stiffener composed of a material having a higher strength than said substrate, said facing being adhered to both said substrate and said stiffener.
(5) In the method described in (4), the face material fixing step is performed in a state in which a spacer is arranged so as to overlap the reinforcing material, and the spacer is in a state before the face material fixing step. and comprising a material that is more susceptible to compressive deformation than the stiffener.
(6) In the method according to (4) or (5), the force applied to the face material during the pressing causes the reinforcing material to move with respect to the base material in the thickness direction of the core material. The method configured to be movable to the

In the panel of the present invention, the core material is composed of the base material and the reinforcing material, and the reinforcing material is adhered to the face material. In such a form, the strength can be increased by arranging the reinforcing material only in the places where the strength is required, so the amount of the reinforcing material used can be minimized. Therefore, it is possible to increase the strength of the panel while suppressing a significant increase in panel weight.

1A is a perspective view of a panel 1 of one embodiment of the invention, and FIG. 1B is a perspective view of a core material 2. FIG. 1B is an enlarged view of the end face at area A in FIG. 1A; FIG. 3 is a perspective view showing a state in which both longitudinal ends of the panel 1 are supported by supporting members 7. FIG. 4A-4D are diagrams corresponding to FIG. 2, showing second to fifth embodiments, respectively. FIG. 5A shows the core material 2 used in the sixth embodiment, and FIG. 5B is an enlarged view of the reinforcing material 5 in FIG. 5A. FIG. 6A shows the core material 2 used in the sixth embodiment, in which the reinforcing material 5 and the spacer 9 protrude from the base material 4, and FIG. It shows the state after sandwiching and pressing.

Embodiments of the present invention will be described below. Various features shown in the embodiments shown below can be combined with each other. In addition, the invention is established independently for each characteristic item.

1. First Embodiment 1-1. Structure of Panel 1 As shown in FIGS. 1 and 2, a panel 1 according to an embodiment of the present invention comprises a core material 2 and a face material 3. As shown in FIGS. It is preferable that the panel 1 has a substantially rectangular parallelepiped shape. The panel 1 can be used as a luggage board or the like installed in the luggage compartment of a vehicle.

The core material 2 is preferably a plate-like member. The thickness of the core material 2 is, for example, 5 to 25 mm, preferably 8 to 20 mm. Specifically, the thickness is, for example, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 20, 25 mm. may be within the range of The thickness of the core material 2 means the distance at the portion where the distance between the first and second main surfaces 2a and 2b facing each other of the core material 2 is the largest. The core material 2 is preferably provided with a recess in which the face material 3 is fixed. As a result, peeling of the face material 3 from the core material 2 is suppressed. The core material 2 comprises a base material 4 and reinforcing material 5 .

Substrate 4 may be foam or non-foam. Moreover, the base material 4 may be a hollow body or a solid body.

Examples of the substrate 4 include a bead foam molded article obtained by bead foam molding, a foamed or non-foamed sheet molded article obtained by imparting an uneven shape to one foamed or non-foamed resin sheet, and a foamed or non-foamed sheet. , a foamed or non-foamed hollow molded article obtained by molding a cylindrical parison or two resin sheets.

The foamed beads can be made of, for example, expanded polystyrene, expanded acrylonitrile styrene, expanded polypropylene, or the like. 35, 40, 45, 50 times, and may be in the range between any two of the values exemplified herein.

The foamed parison or foamed resin sheet can be made of polyolefin such as polyethylene or polypropylene, and the expansion ratio of the molded product using this is, for example, 1.1 to 8 times. 1, 1.5, 2, 3, 4, 5, 6, 7, 8, and may be in the range between any two of the numerical values exemplified herein.

The reinforcing material 5 is made of a material having a higher strength than the base material 4 . Examples of the reinforcing material 5 include metal, wood, and resin. The plastic may be foamed or non-foamed. As used herein, "strength" means Young's modulus at 25°C. The value of {strength of reinforcing material 5/strength of base material 4} is, for example, 1.1 or more, preferably 1.5 or more, and preferably 2 or more. This value is, for example, 1.1 to 1000, specifically, for example, 1.1, 1.5, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 50, 100, 1000, and may be in the range between any two of the numerical values exemplified herein, or any higher value.

In this embodiment, the base material 4 and the reinforcing material 5 are made of foam, and the expansion ratio of the reinforcing material 5 is lower than that of the base material 4 . Since the strength of the foam is higher when the expansion ratio is lower, the strength of the reinforcement member 5 can be made higher than that of the base member 4 by making the expansion ratio of the reinforcement member 5 lower than that of the base member 4 . Moreover, it is preferable that the base material 4 and the reinforcing material 5 are made of the same resin. In this case, since the base material 4 and the reinforcing material 5 are easily welded, it is easy to integrate the base material 4 and the reinforcing material 5 by insert molding, for example. Assuming that the expansion ratio of the reinforcing material 5 is M1 and the expansion ratio of the base material 4 is M2, M1/M2 is, for example, 0.1 to 0.9, and specifically, for example, 0.1, 0.2. , 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, and may be in a range between any two of the values exemplified herein. .

The specific gravity of the reinforcing material 5 is generally higher than that of the base material 4 . The value of {specific gravity of reinforcing material 5/specific gravity of base material 4} is, for example, 1.1 or more. This value is, for example, 1.1 to 1000, specifically, for example, 1.1, 1.5, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 50, 100, 1000, and may be in the range between any two of the numerical values exemplified herein, or any higher value.

The reinforcing member 5 is preferably an elongated member. Assuming that the length in the longitudinal direction is L, and the diameter of the circumscribed circle at the portion where the circumscribed circle diameter in the cross section perpendicular to the longitudinal direction is maximum is D, then L/ D is preferably 5 or more, more preferably 10 or more, and still more preferably 20 or more. L / D is, for example, 5 to 1000, specifically, for example, 5, 10, 15, 20, 50, 100, 1000, within a range between any two of the numerical values exemplified here, or It may be more than one. The reinforcing member 5 preferably has a uniform cross-sectional shape along the longitudinal direction.

The reinforcement member 5 can be provided at any position in the core member 2 and in any size. However, since the reinforcing material 5 usually has a higher specific gravity than the base material 4, it is preferable that the amount of the reinforcing material 5 used is the minimum necessary in order to suppress the increase in weight. Assuming that the volume of the core material 2 is V1 and the volume of the reinforcing material 5 is V2, V2/V1 is preferably 0.5 or less, more preferably 0.3 or less. V2/V1 is, for example, 0.001 to 0.5, specifically, for example, 0.001, 0.01, 0.1, 0.2, 0.3, 0.4, 0.5 Yes, and may be in a range between or less than any two of the numerical values exemplified herein. Assuming that the mass of the core material 2 is W1 and the mass of the reinforcing material 5 is W2, W2/W1 is preferably 0.8 or less, more preferably 0.5 or less, and even more preferably 0.3 or less. W2/W1 is, for example, 0.001 to 0.8, specifically, for example, 0.001, 0.01, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, and may be in a range between or less than any two of the values exemplified herein.

In one example, the reinforcing member 5 is arranged so that the longitudinal direction of the reinforcing member 5 is along the longitudinal direction or the lateral direction of the core member 2 . Assuming that the length of the core material 2 along the longitudinal direction of the reinforcing member 5 is LC and the length of the reinforcing member 5 in the longitudinal direction is L, L/LC is preferably 0.5 or more, and 0.8 or more. preferable. In this case, the strength of panel 1 can be increased over a wide range of panel 1 . L/LC is, for example, 0.5 to 1.0, specifically, for example, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, where It may be in a range between any two of the numerical values given.

The thickness of the reinforcing member 5 with respect to the thickness of the core member 2 is, for example, 0.1 to 1.0. 5, 0.6, 0.7, 0.8, 0.9, 1.0, and may be in the range between any two of the numbers exemplified herein.

The length of the core material in the transverse direction (the length in the direction perpendicular to both the longitudinal direction and the thickness direction) is, for example, 10 to 100 mm, preferably 20 to 40 mm. Specifically, this length is, for example, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 mm, and is within the range between any two of the numerical values exemplified here. good too.

For example, when the length of the core member 2 in the longitudinal direction is LL, and the distance from the center of the core member 2 in the longitudinal direction to the reinforcing member 5 is D, D/LL is 0.20 to 0.20. It is preferable that the reinforcing member 5 is arranged at the position 45 such that the longitudinal direction of the reinforcing member 5 is along the lateral direction of the core member 2 . As shown in FIG. 3, in a state in which both longitudinal ends of the panel 1 are supported by supporting members 7, when a relatively large load 8 is placed near the center of the panel 1 in the longitudinal direction, the D/LL increases. Since there is a tendency for the panel 1 to easily buckle at a position of 0.20 to 0.45, buckling of the panel 1 can be suppressed by providing the reinforcing member 5 at such a position. D/LL is, for example, specifically, for example, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, and between any two of the numerical values exemplified here may be within the range.

The reinforcing material 5 may be provided over the entire thickness of the core material 2, or may be provided only partially in the thickness direction. The reinforcing material 5 may be exposed only on one side of the core material 2 or may be exposed on both sides of the core material 2 .

It is preferable that the substrate 4 and the reinforcing member 5 are flush with each other on the surface where the reinforcing member 5 is exposed. This makes it easier to bond the base material 4 and the reinforcing material 5 to the face material 3 .

The face material 3 is a plate-like member and is fixed to the core material 2 by adhering it to the base material 4 and the reinforcing material 5 . By adhering the face material 3 not only to the base material 4 but also to the reinforcing material 5, the face material 3 and the reinforcing material 5 are integrated, and the reinforcing effect due to the provision of the reinforcing material 5 becomes remarkable, and at the time of vibration, reinforcement is achieved. The material 5 is prevented from interfering with other members and generating abnormal noise. The face material 3 can be made of a material having a higher strength per unit thickness than the base material 4, and can be made of, for example, metal (aluminum, iron, etc.) or fiber-reinforced resin. The thickness of the face material 3 is, for example, 0.1 to 3 mm, preferably 0.3 to 1.5 mm. This depth is, for example, specifically for example 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1 .0, 1.5, 2.0, 2.5, 3.0 mm, and may be in the range between any two of the values exemplified herein. In this specification, values such as thickness and depth mean average values unless otherwise specified.

The face material 3 can be adhered to the base material 4 and the reinforcing material 5 via the adhesive layer 6 . Examples of adhesives forming the adhesive layer 6 include urethane-based adhesives and olefin-based adhesives. The thickness of the adhesive layer 6 is, for example, 0.01 to 0.5 mm. 0.5 mm, and may be in the range between any two of the values exemplified here.

The face material 3 may be provided on only one of the first and second main surfaces 2a and 2b of the core material 2, but may be provided on both the first and second main surfaces 2a and 2b.

1-2. Manufacturing Method of Panel 1 The panel 1 can be manufactured by the following method.

(1) Core Material Preparing Step In the core preparing step, the core material 2 is prepared. The core material 2 is formed by insert molding in which the reinforcing material 5 is inserted when the base material 4 is molded, or the base material 4 and the reinforcing material 5 are separately prepared and then joined (fitting, adhesion, welding, etc.). ) can be formed by

(2) Face Material Fixing Step In the face material fixing step, the base material 4 and the reinforcing material 5 are respectively adhered to the face material 3 . This bonding involves applying an adhesive (e.g., spray coating, bead coating) onto the base material 4 and the reinforcing material 5, and then the face material 3 to the core material 2 (that is, to the base material 4 and the reinforcing material 5). It can be done by pressing. This pressing can be performed, for example, using a roll press. A roll press can press an object with a pair of rollers that rotate in opposite directions. Also, this pressing can be performed by pressing the core member 2 sandwiched between the pair of face members 3 .

2. Second Embodiment A second embodiment of the present invention will be described with reference to FIG. 4A. This embodiment is similar to the first embodiment, and the main difference is the configuration of the reinforcing member 5 . The following description will focus on the differences.

In this embodiment, the reinforcing member 5 is H-shaped, and the reinforcing member 5 includes a column portion 5a and flange portions 5b and 5c provided at both ends of the column portion 5a. It is adhered to the face material 3 .

Since the H-shaped reinforcing member 5 has a high effect of improving the strength per volume, the strength of the panel 1 can be significantly increased by using the reinforcing member having such a shape. Moreover, in this embodiment, since the flange portions 5b and 5c are each adhered to the face member 3, the strength improvement effect is more remarkable.

Each thickness of the flange portions 5b and 5c is, for example, 0.5 to 5 mm, preferably 1 to 3 mm. Specifically, this thickness is, for example, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0 mm and may be in a range between any two of the numerical values exemplified here.

3. Third Embodiment A third embodiment of the present invention will be described with reference to FIG. 4B. This embodiment is similar to the second embodiment, and the main difference is the manner in which the reinforcement member 5 is adhered to the face member 3 . The following description will focus on the differences.

In this embodiment, the configuration of the reinforcing member 5 is the same as that of the second embodiment, but only the flange portion 5b is adhered to the face member 3, and the flange portion 5c is not adhered to the face member 3. Even with such a form, the effects of improving strength and suppressing abnormal noise are exhibited.

4. Fourth Embodiment A fourth embodiment of the present invention will be described with reference to FIG. 4C. This embodiment is similar to the third embodiment, and the main difference is in the configuration of the reinforcing member 5 . The following description will focus on the differences.

In this embodiment, the reinforcing member 5 has a flange portion 5b at one end of the column portion 5a, and no flange portion is provided at the other end of the column portion 5a. The flange portion 5b is adhered to the face material 3. As shown in FIG. The other end of the column portion 5a may or may not be adhered to the face material. Even with such a form, the effects of improving strength and suppressing abnormal noise are exhibited.

5. Fifth Embodiment A fifth embodiment of the present invention will be described with reference to FIG. 4D. This embodiment is similar to the fourth embodiment, and the main difference is the difference in the configuration of the reinforcing member 5 . The following description will focus on the differences.

In this embodiment, the reinforcing member 5 has a flange portion 5b at one end of the column portion 5a, and no flange portion is provided at the other end of the column portion 5a. The flange portion 5b is adhered to the face material 3. As shown in FIG. The other end of the column portion 5a does not reach the face member 3 and extends halfway through the core member 2.例文帳に追加Even with such a form, the effects of improving strength and suppressing abnormal noise are exhibited.

6. Sixth Embodiment A sixth embodiment of the present invention will be described with reference to FIGS. This embodiment is similar to the second embodiment, and the differences will be mainly described below.

(Problems to be solved by the present embodiment)
As in the second embodiment, when the base material 4 and the reinforcing material 5 have the same thickness and the reinforcing material 5 is provided over the entire thickness direction of the base material 4, due to manufacturing variations and the like, If the thickness of the base material 4 becomes smaller than the standard value, when the face material 3 is pressed against the core material 2, the face material 3 is strongly pressed against the reinforcing material 5, and the force of pressing against the base material 4 is increased. may weaken and cause poor adhesion. This problem is significant when the reinforcing member 5 is made of a material that is difficult to compressively deform. This is because if the reinforcing member 5 is made of a material that is difficult to compressively deform, the reinforcing member 5 is hardly deformed by compression, and the force with which the face member 3 is pressed against the base member 4 does not become strong.

In order to avoid such a problem, the standard thickness of the base material 4 is made larger than that of the reinforcing material 5, and the base material 4 is compressed and deformed to reinforce the face material 3 with the base material 4. Adhesion to both members 5 is also conceivable. If the expected variation in the thickness of the substrate 4 is ±1 mm, for example, the thickness of the substrate 4 is 20 mm and the thickness of the stiffener 5 is 19 mm. In this case, since the substrate 4 is prevented from becoming thinner than the reinforcing member 5, it is possible to suppress the occurrence of poor adhesion between the face member 3 and the substrate 4.

However, the thickness of the base material 4 may become thicker than the standard value. A new problem arises in that it is difficult to join 5, and poor adhesion between the face material 3 and the reinforcing material 5 is likely to occur.

Therefore, it is not easy to reliably bond the face material 3 to both the base material 4 and the reinforcing material 5 when the thickness of the base material 4 varies.

(First means: Spacer 9)
As a first means for solving the above problems, in this embodiment, as shown in FIG. With the spacers 9 arranged so as to overlap each other, the face material fixing step is performed as shown in FIG. 6B. The spacer 9 is made of a material that is more likely to undergo compression deformation than the reinforcing member 5 before the bonding step of bonding the face material 3 to the core material 2 (that is, before compression deformation). The ease of compressive deformation can be evaluated based on 10% compressive stress measured according to JIS K 7220, for example.

By providing the spacer 9, even if the base material 4 is thicker than the reinforcing member 5, the force applied to the face member 3 is easily applied to the reinforcing member 5, so that the occurrence of adhesion failure between the face member 3 and the reinforcing member 5 is suppressed. be done. In addition, since the spacers 9 are made of a material that is more susceptible to compression deformation than the reinforcing member 5, the total thickness of the reinforcing member 5 and the spacers 9 is greater than the thickness of the base material 4, as shown in FIG. 6A. When the spacers 9 protrude from the base material 4, as shown in FIG. 6B, the spacers 9 are compressed and deformed to reduce the protrusion amount of the spacers 9. Occurrence of poor adhesion is suppressed.

The spacer 9 is preferably made of a material that is more easily deformed by compression than the base material 4 . Since the spacers 9 are thinner than the base material 4, when the spacers 9 and the base material 4 are compressed by the same thickness, the spacers 9 have a higher compressibility and hardening due to compression becomes remarkable. Therefore, when the spacer 9 is compressed and deformed by pressing the face member 3b against the spacer 9, the shape of the spacer 9 tends to stand out on the face member 3b. Such a problem can be alleviated by forming the spacer 9 from a material that is more susceptible to compression deformation than the base material 4 .

The spacer 9 can be made of foam, for example. In this case, the easiness of compression deformation of the spacer 9 can be changed by changing the magnification of the foam.

The spacer 9 is preferably plate-shaped. Assuming that the thickness of the reinforcing member 5 is T1 and the thickness of the spacer 9 is T2, T2/T1 is preferably 0.01 to 0.5. If this value is too small, the effect of providing the spacer 9 tends to be insufficient, and if this value is too large, the reinforcing effect of the reinforcing material 5 tends to be insufficient. Specifically, T2/T1 is, for example, 0.01, 0.02, 0.05, 0.1, 0.2, 0.3, 0.4, 0.5. may be in the range between any two of

The thickness of the reinforcing material 5 is preferably thinner than that of the base material 4 . Also, the total thickness of the reinforcing member 5 and the spacer 9 is preferably equal to the thickness of the base material 4, but may be slightly thicker or thinner than the thickness of the base material 4. The difference between the total thickness of the reinforcing member 5 and the spacer 9 and the thickness of the base material 4 is, for example, 1 mm or less, preferably 0.5 mm or less. Assuming that the thickness of the base material 4 is T3, (T1+T2)/T3 is, for example, 0.95 to 1.05, preferably 0.98 to 1.02.

The spacers 9 may or may not be glued to the stiffeners 5 . Further, it is sufficient that the reinforcing material 5 is adhered to the face material 3a on the surface on which the spacers 9 are not arranged (the first main surface 2a in this embodiment), and the spacers 9 are adhered to the face material 3b. It doesn't have to be. The spacers 9 may or may not be glued to the stiffeners 5 .

(Second means: Reinforcing material 5 is movable with respect to base material 4)
As a second means for solving the above problem, in this embodiment, when the face material 3 is pressed against the core material 2, the force applied to the face material 3 causes the reinforcing material 5 to move against the base material 4. A configuration is adopted in which it is configured to be movable in the thickness direction of the material 2 . Although it is possible to employ the second means alone, it is preferable to employ the second means together with the first means.

As shown in FIG. 6A, when the reinforcing member 5 protrudes from the base material 4 on the first main surface 2a side of the core material 2, even if the spacer 9 is arranged on the second main surface 2b side, the surface material In the fixing step, the protrusion of the reinforcing member 5 on the side of the first main surface 2a may not be eliminated. In this embodiment, when the reinforcing member 5 is pressed by the face member 3, the reinforcing member 5 moves in the thickness direction of the core member 2 with respect to the base material 4, and the protrusion of the reinforcing member 5 is reduced. This suppresses the occurrence of poor adhesion between the face material 3 and the base material 4 .

In the above configuration, for example, as shown in FIGS. 5A and 5B, when the protruding portion 4a of the base material 4 is arranged between the flange portions 5b and 5c of the reinforcing member 5, the flange portions 5b and 5c It can be realized by making the distance D1 between the inner surfaces larger than the thickness T4 of the protruding portion 4a.

D1/T4 is, for example, 1.01 to 1.2, specifically, for example, 1.01, 1.05, 1.1, 1.15, 1.2. may be in the range between any two of

When such a configuration is adopted, although the reinforcing material 5 can be made movable with respect to the base material 4, the base material 4 and the reinforcing material 5 are easily separated from each other before the face material fixing step. It may become difficult to handle in the manufacturing process.

Therefore, as shown in FIG. 5B, the flange portions 5b and 5c are provided with claws 5b1 and 5c1 protruding from the inner surface. By making the claws 5b1 and 5c1 bite into the projecting portion 4a, the base material 4 and the reinforcing member 5 can be made difficult to separate. Further, since there are gaps between the inner surfaces of the flanges 5b and 5c and the protruding portion 4a at portions other than the claws 5b1 and 5c1, when a force in the thickness direction of the core material 2 is applied to the reinforcing member 5, the claws 5b1 and 5c1 will By increasing the biting amount of any one of 5c1, the reinforcing material 5 can move in the thickness direction of the core material 2 with respect to the base material 4. As shown in FIG.

7. Other Embodiments If necessary, a skin material may be provided so as to cover the core material 2 and the face material 3 . As a result, it is possible to improve the appearance and prevent the face material 3 from peeling off from the core material 2 . The skin material is, for example, a nonwoven fabric, and can be adhered to the face material 3 and the core material 2 via an adhesive layer.

Reference Signs List 1 : Panel 2 : Core material 2a : First main surface 2b : Second main surface 3 : Face material 3a : Face material 3b : Face material 4 : Base material 4a : Protruding part 5 : Reinforcement material 5a : Column part 5b : Flange Portion 5b1: Claw 5c: Flange portion 5c1: Claw 6: Adhesive layer 7: Support member 8: Baggage 9: Spacer

Claims (6)

A panel comprising a core material and a face material,
The core material includes a base material and a reinforcing material made of a material having a higher strength than the base material,
The panel, wherein the base material and the reinforcing material are each adhered to the facing material. A panel according to claim 1, comprising:
The panel, wherein the base material and the reinforcing material are made of foam, and the expansion ratio of the foam constituting the reinforcing material is lower than the expansion ratio of the foam constituting the base material. A panel according to claim 1 or claim 2,
The reinforcing member includes a column and flanges provided at one end or both ends of the column, and the flange is adhered to the face member. A panel manufacturing method comprising:
A face material fixing step of bonding the face material to the core material by pressing the face material against the core material,
The core material includes a base material and a reinforcing material made of a material having a higher strength than the base material,
A method, wherein the face material is adhered to both the substrate and the stiffener. 5. The method of claim 4, wherein
The face material fixing step is performed in a state where a spacer is arranged so as to overlap the reinforcing material,
The method according to claim 1, wherein the spacer is made of a material that is more susceptible to compression deformation than the reinforcing material before the face material fixing step. A method according to claim 4 or claim 5,
The method, wherein the reinforcing material is configured to be movable in the thickness direction of the core material with respect to the base material by a force applied to the face material during the pressing.

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