JPH0929841A - Laminating method for skin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for laminating a skin to stabilize the productivity and to simultaneously eliminate the positional deviation of the skin by arranging an enclosing film at a suitable position. SOLUTION: This method for laminating a skin comprises the first step of supporting a core material 8 in the state that the outer peripheral edge is extended on a holding base 1, the second step of setting the skin 9 to a skin receiving base 2 disposed above the ground point from the material 9, arranging a film frame 3 above the base 2, providing a cushioning member 4 at the film frame lower side, expanding it in a downward protruding state to cover it with an enclosing film 31. The method further comprises the third step of moving down the frame 3 to reach the film 31 on the skin, the fourth step of covering the skin 9 on the material 8 from above with the film 31 to form a closed space S around the base 1, and the fifth step of vacuum evacuating the space S to pressure reduce it to suck the film 31 together with the skin 9 to the material 8 and winding the outer peripheral edge 91 of the skin with the rear side of the outer peripheral edge 81 of the core.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for attaching an outer skin, in which a surface of a core material is covered with a flexible outer skin, and the outer peripheral edge of the outer skin is wound around the back side of the core material for application.

[0002]

2. Description of the Related Art In interior parts such as automobile pillar garnish and door trim, a synthetic resin sheet as shown in FIG. 9 is formed on the surface of a core material 8 made of hard plastic, metal plate or the like as shown in FIG. A flexible outer skin 9 made of fabric or the like is attached, and the outer peripheral edge 91 of the outer skin 9 is wound around the back side of the outer peripheral edge 81 of the core material 8 and fixed by an adhesive as shown in FIGS. 10 and 11. Has been done. The pasting of the skin 9 to the core material 8 has hitherto been performed by manual work, vacuum forming, pressure bonding press forming, or the like. However, in the case of manual work, there are problems that the productivity is poor and that the finished quality varies depending on the skill of the worker. On the other hand, in the case of vacuum forming, it is troublesome because the outer peripheral edge of the epidermis must be manually wound up on the back surface of the outer peripheral edge of the core after vacuum suction of the epidermis on the surface of the core, and the epidermis is impermeable to air. Therefore, there is a problem that usable materials are limited. Also, in the case of press molding,
There is a limitation on the shape of the core material that can be adopted, such as the fact that an undercut shape cannot be adopted, and there is also a problem that equipment such as a press device becomes large-scale and the equipment cost increases.

Therefore, the present applicant has already proposed a method for solving these problems by the invention described in Japanese Patent Application Laid-Open No. 5-220843, which was previously filed and published. That is, the core material is supported on the core material holding base with its outer peripheral edge free, and after placing the epidermis on the core material, the core material is covered with a flexible and stretchable wrapping film for wrapping. A closed space is formed between the film and the base surface of the lower part of the holding table, the closed space is decompressed, and the wrapping film is wound around the core material side together with the flexible skin, thereby making the skin material a core material. It was fixed on the back side of the outer peripheral edge.

[0004]

However, according to the above method, even a slight breeze is likely to be affected, which often causes trouble in manufacturing. When the wrapping film 31 is covered on the core material 8, the wrapping film 31 is light, and even if a slight cross wind blows, the wrapping film 31 is biased to one side as shown in FIG. A closed space could not be formed between the base surface 62 below the holding table. Even if a closed space is created, it is often the case that the winding process of the skin 9 is impossible. In addition, the outer skin 9 placed on the core material 8 was easily displaced when the covering film 31 was covered.

The present invention solves the above problems and is easy to operate and highly productive. Moreover, the wrapping film is disposed at an appropriate position to stabilize the productivity, and at the same time the position of the epidermis is improved. It is an object of the present invention to provide a method for attaching an epidermis that eliminates deviation.

[0006]

[Means for Solving the Problems] In order to achieve such an object,
The first method of the present invention comprises: a first step of supporting a core material on a holding base with its outer peripheral edge protruding, and a frame shape surrounding the core material, and a skin arranged at a point above the core material. The second step of setting the flexible skin on the pedestal, and disposing a film frame above the skin pedestal and providing a cushion body at substantially the center of the lower side of the film frame so that the cushion body has a downward convex shape. After covering the inside of the film frame with a wrapping film so as to swell, the film frame is lowered, the third step of reaching the wrapping film on the epidermis, and the epidermis in parallel with the lowering of the film frame A fourth step of lowering the pedestal and shrinking or moving the cushion body to form a closed space around the holding table by the covering film covering the outer skin on the core material from above, and vacuum suctioning the closed space. And then decompress it The film is adsorbed on the core material with the skin, there attaching method of the epidermis consisting of coupling steps, including a fifth step of caught the outer peripheral edge of the epidermis on the back side of the outer peripheral edge of the core, the. Here, in the case of “lowering the skin cradle in parallel with the lowering of the film frame”, the film frames and the skin cradle may be simultaneously advanced regardless of the descending order.

A second aspect of the present invention is the method for attaching a skin according to the first aspect, wherein a linear bush is attached to the film frame, and the cushion body has a mold surface that follows the surface of the core material. A shaft body fixedly attached to the upper surface and vertically passing through the linear bush so as to be vertically movable, the film frame is lowered, and the inside of the linear bush is covered as the wrapping film covers the epidermis on the core material. It is characterized in that the shaft is moved upward and the presser plug is interlocked with the shaft. The method for attaching the epidermis according to the third aspect of the present invention is characterized in that the cushion body according to the first aspect is made of a sponge material, and the cushion body is arranged at the center of the lower surface of the film frame facing the holding base.

According to the method of attaching the epidermis according to the first aspect of the present invention, prior to the covering of the core material on the holding base and the epidermis, the wrapping film which bulges downward in a substantially convex shape at the center of the film frame by the cushion body. Is stretched over the film frame,
Even if cross wind blows when the film frame descends, the cushioning body suppresses the unevenness of the wrapping film. Then, when the wrapping film covers the epidermis on the core material from above while contracting or moving the cushion body upward, the reaction force of the cushion body or its own weight appropriately presses the epidermis to the core material side, so the position of the epidermis The gap is less likely to occur. At the same time, since the wrapping film that the cushion body has occupied so far becomes excessive and becomes dubbed, a closed space can be reliably formed around the holding table. When the cushion body is composed of the presser plug and the shaft body vertically movably passing through the linear bush vertically on the upper surface, as in the method for attaching the skin of the second invention, the presser body is provided with the stopper to provide the presser foot. The height of the plug can be adjusted easily, and the degree of bulging of the wrapping film can be set as desired. Furthermore, if the presser plug has a mold surface that follows the surface of the core material,
When the wrapping film covers the epidermis on the core material from above, the presser plug presses the epidermis with its own weight through the wrapping film, so that the displacement of the epidermis becomes even less likely to occur. As in the method for attaching the epidermis of the third invention, even if the cushion body is formed of a sponge body, it prevents the wrapping film from being biased to one side due to the influence of wind, and the wrapping film is the skin on the core material. When covering from above, the reaction force presses against the epidermis with the contraction to prevent positional displacement, so that the structure is simple but effective.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below. (1) Example 1 FIGS. 1 to 4 show an embodiment of a method for attaching an epidermis according to the present invention, which is applied to manufacture a pillar garnish product for automobiles. FIG. 1 is an overall vertical cross-sectional view of the sticking device, FIG.
1 is an operation state diagram from FIG. 1, a longitudinal sectional view when the wrapping film is dropped on the epidermis, FIG. 3 is an operation state diagram from FIG. 2, and FIG. 4 is an operation state diagram from FIG.

First, the sticking device used in the sticking method of the epidermis of the present invention will be described. The sticking device includes a holding table 1, a skin receiving table 2, a film frame 3, a cushion body 4, a vacuum pump 5 for vacuum suction, and a vacuum box 6, and sticks a skin 9 on a core material 8. The vacuum box 6 is a rectangular body having a vacuum chamber 61 formed therein, and has an upper surface serving as a base surface 62. Although not shown, a plastic plate (or a plastic film) made of polyacetal resin having excellent self-lubricating property is laid on the base surface 62 to secure a smooth surface. The holding table 1 is fixedly arranged at substantially the center of the base surface 62.

The holding table 1 is a molded body having a space 11 inside and having a predetermined thickness, and supports the core material 8 by floating it from the base surface 62. The upper surface has a shape along the back surface of the core material 8. Then, while the upper surface of the holding base 1 is fitted to the shape of the core material 8, the outer shape of the holding base 1 is set smaller than that of the core material 8 so that the outer peripheral edge of the core material 8 can be supported in a state of protruding from the holding base 1. ing. Ventilation holes 12 are formed at a plurality of locations on the holding table 1, and these ventilation holes 12 communicate with the vacuum chamber 61 from the lower portion of the holding table 1.

The skin receiving base 2 is a frame-like body which surrounds the holding base on four sides and has a frame shape, and comprises a flat portion 21 and a raised portion 22. The flat portion 21 supports the skin 9 that has been cut into a predetermined size in advance so that trimming processing is unnecessary in a later step, and the outer shape thereof substantially matches the size of the skin, and the upper surface is a flat surface. The raised portion 22 is provided on the outer side of the flat portion 21, and contacts the wall portion of the outer peripheral edge of the skin 9 placed on the flat portion 21 to prevent lateral displacement of the skin 9. The skin receiving table 2 is located slightly above the core material 8 placed on the holding table 1 at the highest rising point by the operation of the cylinder 7 (FIG. 1), and at the lowest descending point, the base surface 62 Placed on top (Fig. 3).

The film frame 3 is a rectangular frame body which is slightly larger than the skin pedestal 2, and the inside of the frame is covered with the wrapping film 31, and the wrapping film 31 is provided on both sides of the film frame.
Lock. The film frame 3 can be lowered from a position above the skin receiving base 2 (FIG. 1) to above the base surface 66 (FIG. 3) by an elevator mechanism (not shown) attached to the upper surface thereof. When the film frame 3 is installed on the base surface 66, the wrapping film 31 forms a closed space S around the holding table. A gate-shaped frame 32 is provided at the center of the film frame, and a linear bush 33 is fixed to the upper surface of the gate-shaped frame 32. Further, a cushion body 4 is provided at the lower center of the film frame 3, and the wrapping film 31 is inflated and stretched by the cushion body 4 in a downward convex shape (FIG. 1).

The cushion body 4 is composed of a presser plug 41 having a shaped surface following the surface of the core material 8 and a shaft body 42 fixed to the upper surface of the presser plug. The shaft body 42 vertically extends through the linear bush 33 and is normally hung by the weight of the cushion body 4 itself.
When 3 hits the linear bush 33, it stops. Then, when the film frame 3 is lowered to the lowermost end by the elevating mechanism, the skin 9 is pressed onto the core material 8 and is relatively pushed up by the holding table 1 on which the core material 8 and the skin 9 are placed, and moves upward. It is a mechanism.

A suction port of the vacuum pump 5 as a suction means communicates with the inside of the vacuum box 6 via a conduit 51, and further communicates with a space 11 in the holding table 1. As described above, the core material 8 and the skin 9 are placed on the holding base 1, and the wrapping film 31
After the closed space S is formed around the holding table 1 and the vacuum pump 5 is activated, the air in the closed space S is vacuum-sucked to reduce the pressure, and the wrapping film shrinks, so that the back surface side of the outer peripheral edge of the core material is reduced. The outer peripheral edge of the epidermis can be rolled into the inside (Figs. 3 and 4).

Next, a method of attaching the epidermis to the core material using the above-mentioned attaching device will be described. Prior to the attachment of the epidermis 9, pretreatment is performed. The outer skin 9 is cut into a predetermined size, and an appropriate adhesive is spray-applied in advance to the front surface and the outer peripheral edge of the back surface of the core material 8 (or the back surface of the outer skin 9 or the like). The core material 8 is preheated to about 80 ° C., if necessary, in order to facilitate attachment.

First, the core material 8 is placed on the holding table 1 so that the outer peripheral edge 81 of the core material 8 is projected from the holding table 1 (first step). The core material 8 has a shape corresponding to the product and is made of a rigid material such as hard plastic or metal plate that can maintain the shape. In the first step, the upper surface shape of the holding base 1 is matched with the lower surface shape of the core material 8 as in the present embodiment so that the core material 8 is supported at a fixed position of the holding base, or a positioning piece is placed on the holding base 1. It is preferable to provide such as projecting.

Then, the cylinder 7 is operated to stop the skin receiving base 22 at a position higher than the core material 8 on the holding base 1. This operation may be performed before the core material 8 is supported on the holding table 1. Then, the flexible skin 9 cut into a predetermined size is set on the skin receiving base 22 (second step). Epidermis 9
The sheet is placed on the flat portion 21 in a state where the lateral displacement is prevented by the raised portion 22. Of course, the skin 9 may be slightly bent as shown in FIG. 1, and the skin may be received not only by the flat portion 21 but also by the core material 8 on the holding table. Here, the outer skin 9 is cut around the outer peripheral edge 91 with a margin, and the core material 8
It is larger. For the skin 9, for example, a vinyl chloride sheet-like crosslinked foam (having a thickness of 0.30 to 0.45 mm)
Of the foam layer having a thickness of 1.5 to 3 mm to the solid layer by adhesive lamination or heat fusion, or a foamed polyethylene sheet foam (a solid layer having a thickness of 0.30 to 0.45 mm, a thickness of 1 (A heat-sealed foam layer having a thickness of 0.5 to 3 mm), and further, a vinyl chloride sheet to which a urethane foam slab (thickness: 1 to 3 mm) is adhesively laminated are used. These epidermis 9 have a temperature of 80 ° C. to 9 ° C. prior to the attachment of the epidermis 9 in order to allow extensional deformation to some extent.
Heating to 0 ° C. is customary. The outer skin 9 may be a flexible material such as a fabric instead of the above material, and in this case, it does not matter whether it is inspiratory or non-inspiratory. still,
No heating is required when using fabric.

Next, a film frame 3 having a wrapping film 31 stretched inside the frame is arranged above the skin receiving base 2, and the wrapping film 31 bulges downward in a convex shape by a holding plug hanging down by its own weight. Then, both sides of the wrapping film are locked to the film frame 3 (FIG. 1). Here, as for the height of the presser plug 41, the level of the stopper 43 is adjusted so that it comes into contact with the packaging film 31 as shown in FIG.
It is important that the wrapping film 31 does not loosen. Otherwise, the portion of the light wrapping film 31 that is dubbed due to cross wind is biased to one side, and the closed space surrounded by the wrapping film 31 described later (fifth step) is vacuum-sucked to the core material 8 together with the epidermis. It becomes difficult to adsorb. After a while
The film frame 3 is lowered by an elevator mechanism (not shown), and
As shown in (3), the film 31 for wrapping is allowed to reach on the epidermis (third step). The film frame 3 continues to descend without slowing its descending speed, and the base surface 6
Land on 6.

At the stage where the presser plug 41 descends and contacts the skin 9 with the wrapping film 31 interposed,
The epidermis cradle 2 is lowered. The lowering timing of the skin receiving base 2 is convenient for preventing the skin from being displaced by the raised portion 22 when the pressing plug 41 presses the skin 9 toward the core material 8 from above. In the present embodiment, the cylinder 7 contracts before the film frame 3 reaches the base surface 62, and the skin cradle 2 reaches the base surface 62 so that the closed space S can be easily formed. .

In the descending process of the film frame 3, after the wrapping film 31 reaches the outer skin 9, the presser plug 41, which is a cushion body, is prevented from descending by the holding base 1, and the shaft body 42 inside the linear bush 33. As a result, the die surface of the presser plug is pressed against the outer skin 9 from above by its own weight and is relatively lifted as the film frame 3 descends (FIG. 3). The upward movement of the shaft body 42 in the linear bush 33 is mechanically simple without using a cylinder or the like,
Moreover, since the film frame 3 automatically follows up even if the descending speed of the film frame 3 is increased, it contributes to the productivity increase of the work of attaching the epidermis. Thus, the epidermis cradle 2 and the film frame 3
3 is landed on the base surfaces 62 and 66, and as shown in FIG. 3, the outer skin 9 on the core material 8 is covered with the wrapping film 31 from above to form the closed space S around the holding table 1 (fourth step).

Then, the vacuum pump 5 is operated to suck and depressurize the air in the closed space S to wind the skin 9 (fifth step). The air in the vacuum chamber 61, the space 11, and the ventilation hole 12 is sucked to adsorb the skin 9 on the surface of the core material 8, and the air in the closed space S is also sucked in vacuum. The air in the closed space S is supplied from the back surface of the core material 8 to the ventilation hole 12, the space 11, the vacuum chamber 61,
It is sucked by the vacuum pump 5 via the conduit 51 and discharged to the outside of the system. Vacuum suction in the closed space S is a few seconds (here about 8 seconds)
Complete with Here, it is preferable to use, as the packaging film 31, a flexible film having excellent slidability and having no air intake or low air intake. Specifically, a polypropylene film, a polyethylene film, a polyester film, a nylon film, or the like, among which a film having a small friction resistance on the surface and slippery, such as a polyethylene film, is suitable because the winding operation is not hindered. The film includes a sheet.

Thus, even if a side wind blows when the film frame 3 is lowered, the pressing plug 41 protruding downward prevents the packing film 31 from fluttering and being biased, and the pressing plug 41 is appropriately pressed to cover the skin. The upper surface of the epidermis 9 is attached while suppressing the positional deviation of the epidermis 9, and further vacuum suction is applied to the outer peripheral edge 9 of the epidermis.
1 is rolled up on the back side of the core material to make a skin-attached product that does not wrinkle or float over the entire product. After that, the vacuum suction is stopped and the epidermis cradle 2 and the film frame 3 are returned to their initial positions, whereby a desired pillar garnish in which the epidermis 9 is attached to the core material 8 is obtained.

In this way, a series of skin attachment work is completed. When the film frame 2 returns to the initial position, the shaft 42 descends in the linear bush 33 and is set to the initial position. The wrapping film 31 keeps a shape that bulges downward in a convex shape with the presser plug 41 in a state without dulling.
Of course, even if the wind blows, the presser plug 41 has a shape-retaining action that is downwardly convex. Therefore, when the next skin attachment operation (second and subsequent attachment operations) is to be continued, the stopper level is adjusted so as to contact the wrapping film one by one so that the wrapping film 31 does not become dull. No hassle. That is, the above-mentioned steps except this work are repeated to perform the continuous sticking work of the epidermis.

In the above-mentioned method of attaching the skin, the skin receiving base 2 is started to descend during the lowering of the film frame 3, but the effect of preventing the displacement of the skin 9 is weak, but the skin receiving base 2 It is possible to lower the film frame 3 after lowering or to simultaneously lower. In addition, after the skin pedestal 2 has reached the base surface 62, the film frame 3 is attached to the base surface 6
Although 6 is reached, the order may be reversed or simultaneous arrival may be performed.

(2) Example 2 FIGS. 5 and 6 show another embodiment used in the method for attaching the epidermis. Instead of the cushion body 4 composed of the pressing plug 41 and the shaft body 42, a cushion body 4'is formed of a sponge material. The other device configuration is the same as that of the first embodiment. The cushion body 4'is substantially rectangular and is fixed to the back side of the gate-shaped frame 32 at the center of the lower surface of the film frame 2, and the lower portion of the cushion body 4'forms a recess 44 following the surface of the core material.

The cushion body 4'is designed such that the wrapping film 31 in the film frame covers the cushion body 4'in a downward convex shape without being subjected to an external load until the third step. Therefore, the bulging cushion body 4'prevents the wrapping film 31 from being biased even if there is a side wind or the like. Further, in the step of lowering the skin pedestal 2 and the film frame 3 in the fourth step, the wrapping film 31 covers the skin 9 on the core material 8 from above to form the closed space S around the holding table 1, The body 4'is contracted by the holding table 1 and the gate-shaped frame 32 to change into a contracted state. Then, with the compression of the cushion body 4 ', an appropriate reaction force is generated, which eliminates the positional deviation of the outer skin 9 and sticks the outer skin 9 onto the upper surface of the core material 8 neatly. The other steps for attaching the epidermis are the same as in Example 1.

(3) Effect of Example According to the method of attaching the epidermis having the above-described aspect, the epidermis which can be used for various epidermis 9 and the core material 8 by a simple operation and which is cut into a predetermined size in advance. By using No. 9, it is possible to attach the epidermis to the core material without post-processing (trimming). Then, the cushion bodies 4 and 4'include the wrapping film 3
1 maintains the shape of the film frame 3 in a state of being inflated in a convex shape at the central position of the film frame 3, so that the packaging film 31
Are lowered to the proper positions on the core material 8 and the skin 9, and the outer peripheral edge 9 of the skin is
The roll-in of 1 proceeds smoothly and the finish is stable.
Further, since the presser plug 41 descends together with the wrapping film 31 and presses the epidermis 9, the slippage of the epidermis is effectively prevented. Further, the film frame 3 is lowered to make the wrapping film 3
The shaft body 42 moves upward in the linear bush 33 as 1 covers the skin 9 on the core material 8. However, since the shaft body is simply inserted into the linear bush 33, the film is formed. Even if the descending speed of the frame 3 is increased, the frame 3 can be sufficiently followed, and the productivity can be improved. Even with the cushion body 4'as in the second embodiment, it is possible to prevent the wrapping film 31 from being biased by the wind while having a simple structure, and to lower the skin together with the film frame 3 by an appropriate reaction force due to the contraction. Helps to prevent presser and slippage.

The present invention is not limited to those shown in the above-mentioned embodiment, but can be variously modified within the scope of the present invention depending on the purpose and application. It is not limited to pillar garnishes for automobiles, but can be widely used when attaching the skin 9 to the core material 8. In that case, the material and shape of the core material 8 and the skin 9 are the purpose of use of the product and required. It can be changed in various ways depending on strength, application, etc. The size, shape, etc. of the holding table 1, the skin receiving table 2, the film frame 3, the cushion body 4, etc. can be appropriately selected according to the application. The cushion body 4 is not limited to a sponge material, but may be a balloon body formed by air compression, for example. In the embodiment, the film frame 3 is made slightly larger than the skin pedestal 2, but they may have substantially the same size so that the film frame overlaps with the skin pedestal when landing on the base surface.

[0030]

As described above, according to the method of sticking the epidermis according to the present invention, the wrapping film is properly arranged and the productivity is stabilized and the displacement of the epidermis is prevented by a simple operation. It exerts great effects such as stable quality and improved productivity.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an overall configuration of an epidermis sticking apparatus in Example 1.

FIG. 2 is an overall cross-sectional view of an apparatus showing the operation of the epidermis sticking apparatus.

FIG. 3 is an overall cross-sectional view of an apparatus showing the operation of the epidermal sticking apparatus.

FIG. 4 is an overall cross-sectional view of an apparatus showing the operation of the epidermal sticking apparatus.

FIG. 5 is a cross-sectional view showing an overall configuration of an epidermis sticking device according to a second embodiment.

FIG. 6 is an overall cross-sectional view of an apparatus showing the operation of the epidermal sticking apparatus of Example 2.

FIG. 7 is an overall cross-sectional view showing a prior art device.

FIG. 8 is a perspective view showing an example of a core material.

FIG. 9 is a perspective view showing an example of a skin.

FIG. 10 is a perspective view showing an example of a core material when the epidermis is attached.

FIG. 11 is a cross-sectional view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Holding stand 2 Skin receiving stand 3 Film frame 31 Wrapping film 33 Linear bush 4,4 'Cushion body 41 Presser plug 42 Shaft body 8 Core material 81 Outer peripheral edge 9 Epidermis 91 Outer peripheral edge S Closed space

Claims (3)

[Claims] 1. A method for attaching an epidermis, which comprises bonding including the following steps. (A) A first step of supporting the core material on the holding table with the outer peripheral edge thereof protruding (b) A frame-shaped surrounding the core material, on a skin receiving table arranged above the core material Second step of setting the flexible skin (C) A film frame is arranged above the skin receiving base, and a cushion body is provided at substantially the center of the lower side of the film frame, and the cushion body bulges downward in a convex shape. After covering the inside of the film frame with the wrapping film in this way, the film frame is lowered, and the third step of reaching the wrapping film on the skin (d) The skin receiving member in parallel with the lowering of the film frame 4th step of lowering the table and forming a closed space around the holding table by covering the outer skin on the core material from above with the wrapping film while contracting or moving the cushion body upward (e) Vacuum suction of the closed space And then decompress it Fifth step of adsorbing the film for film to the core material together with the skin and winding the outer peripheral edge of the skin onto the back side of the outer peripheral edge of the core material 2. A linear bush is attached to the film frame, the cushion body is fixed to a pressing plug having a mold surface following the surface of a core material, and is fixed to the upper surface of the pressing plug so as to be vertically movable in the linear bush. With the shaft body passing vertically, the film frame is lowered, and the shaft body moves up in the linear bushing as the wrapping film covers the outer skin on the core material, and the presser plug is interlocked with this. The method for attaching the epidermis according to claim 1, wherein 3. The method of attaching an epidermis according to claim 1, wherein the cushion body is made of a sponge material, and the cushion body is arranged at the center of the lower surface of the film frame facing the holding table.