KR20210035364A - Manufacturing method of interior materials to minimize deep drawing molding - Google Patents

Abstract

A disclosed manufacturing method of interior materials to minimize deep drawing molding includes: a first step of preparing a first fabric; a second step of preheating the first fabric with a heater; a third step of putting the first fabric in a press mold and compressing the first fabric while molding the first fabric into an interior material, and simultaneously forming a core by cutting out all or a part of the second area requiring deep drawing molding in order to form a pocket in the first area surrounding the interior material shape in the first fabric and the interior material shape; a fourth step of inserting the core into the injection mold and injection molding a pocket coupled to the rear surface of the core so that the second area surrounds the removed part; and a fifth step of forming a skin coupled to the core and the pocket by wrapping the front surface of the core on which the pocket is formed with the second fabric, wherein all or part of the pocket is formed by injection molding instead of deep drawing molding. According to the present invention, the deep drawing molding is performed to prevent the core from becoming too thin or the core from being damaged, and the compression, molding, and trimming of the first fabric are performed together with a press mold to shorten the process and reduce production costs.

Description

Manufacturing method of interior materials to minimize deep drawing molding}

The present invention relates to a method for manufacturing an interior material that minimizes deep drawing molding, and more particularly, to a method for manufacturing an interior material capable of forming a part or all of a part required for deep drawing molding among interior materials such as automobiles by injection molding.

Parts of interior materials such as automobiles having a large height difference in shape may be manufactured by deep drawing molding.

Deep drawing refers to a method in which the diameter of a material is reduced or the periphery of a plate is narrowed to the center and processed into a container shape (eg, a cup shape).

In the case of a door trim, one of the interior materials of automobiles, the deeply recessed part like a map pocket can be processed by deep drawing molding using a press mold.

In the case of manufacturing an interior material using a press mold made of a fabric made of plastic, etc., there are problems such as occurrence of wrinkles, thinning of thickness, or breakage in the portion where deep drawing is formed.

In the portion where the deep drawing is formed, the greater the difference in height of the shape, the more the above problem may occur.

In recent years, as vehicle interior materials have become more advanced, in-mold graining (IMG) has been introduced as a method for molding interior materials.

IMG molding makes it possible to treat the surface of a more luxurious interior material by using a mold (electric pole mold) in which an elaborate pattern or texture is implemented through electroforming (elctro forming).

Korean Patent No. 10-0666785 relates to a'method for manufacturing a filler trim for automobiles'. In manufacturing a filler trim having a deep drawing shape, wrinkles occur when a skin material is attached to a substrate with an adhesive. It discloses a technology for solving the existing problems that have occurred.

However, Korean Patent No. 10-0666785 can solve the problem of wrinkles in the skin material, but it cannot solve the problem that the thickness of the substrate becomes too thin or the substrate is damaged.

It is an object of the present invention to provide a method for manufacturing an interior material that minimizes deep drawing molding in which a part or all of a portion required for deep drawing molding in the interior material can be formed by injection molding.

In addition, an object of the present invention is to provide an interior material manufacturing method that minimizes deep drawing molding that can shorten the interior material manufacturing process.

The object is a first step of preparing a first fabric; A second step of preheating the first fabric with a heater; In order to form the first fabric into an interior material shape while putting the first fabric in the press mold and compressing the first fabric, deep drawing molding is required to form a pocket in the interior material form and the first area surrounding the interior material form in the first fabric. A third step of cutting out all or part of the second area to form a core; A fourth step of inserting the core into the injection mold and injection-molding a pocket coupled to the rear surface (lower surface) of the core so as to surround the portion from which the second region has been removed; And a fifth step of forming a skin coupled to the core and the pocket by wrapping the front surface (upper surface) of the pocket-formed core with a second fabric, and forming all or part of the pocket by injection molding instead of deep drawing molding. It can be achieved by an interior material manufacturing method that minimizes shaping.

In addition, the above object, the first step can be achieved by a method for manufacturing an interior material that minimizes deep drawing molding, in which the first fabric is a felt made of natural fiber polypropylene.

In addition, the above object, the second step can be achieved by the interior material manufacturing method for minimizing the deep drawing molding in which the heater preheats the first fabric to 80 ~ 90 ℃ using water vapor.

In addition, the above object, the third step can be achieved by a method for manufacturing an interior material that minimizes deep drawing molding in which the core is formed after the press mold is preheated.

In addition, the above object, the fourth step can be achieved by a method for manufacturing an interior material that minimizes deep drawing molding in which a reinforcing structure is further injection molded on the rear surface of the core.

In addition, the above object, the fifth step can be achieved by the interior material manufacturing method to minimize the deep drawing molding in which the skin is formed by IMG molding.

In addition, the above object is to form a skin after preheating the core and the second fabric, but the second fabric is transparent, and the second fabric is impregnated in the core, so that the pattern and texture of the core are exposed to the outside of the skin. It can be achieved by an interior material manufacturing method that minimizes drawing molding.

In addition, the above object can be achieved by a method for manufacturing an interior material that minimizes the deep drawing molding of the second fabric and a transparent sheet having a predetermined pattern that is bonded to the transparent film.

In addition, the above object, the second fabric can be achieved by a method for manufacturing an interior material that minimizes deep drawing molding including an optical fiber for illumination between a transparent film and a transparent sheet.

In addition, the fourth step can be achieved by a method for manufacturing an interior material that minimizes deep drawing molding in which a transparent cushion layer is first injection-molded on the front surface of the core, and then pockets are injection-molded on the rear surface of the core.

According to the interior material manufacturing method for minimizing the deep drawing molding according to the present invention, the first step of preparing a first fabric; A second step of preheating the first fabric with a heater; In order to form the first fabric into an interior material shape while putting the first fabric in the press mold and compressing the first fabric, deep drawing molding is required to form a pocket in the interior material form and the first area surrounding the interior material form in the first fabric. A third step of cutting out all or part of the second area to form a core; A fourth step of inserting the core into the injection mold and injection-molding a pocket coupled to the rear surface of the core so as to surround the portion from which the second region has been removed; And a fifth step of forming a skin that is coupled to the core and the pocket by wrapping the entire surface of the pocket-formed core with a second fabric, so that all or part of the pocket can be formed by injection molding instead of deep drawing molding. Molding can prevent the core from becoming too thin or the core to be damaged, and it is possible to shorten the process and reduce the production cost by performing compression, shaping, and trimming of the first fabric with a press mold.

In addition, according to the interior material manufacturing method for minimizing the deep drawing molding according to the present invention, the first step may be a felt made of natural fiber polypropylene in the first step, and thus a lightweight eco-friendly interior material can be provided.

In addition, according to the interior material manufacturing method for minimizing deep drawing molding according to the present invention, in the second step, since the heater can preheat the first fabric to 80 to 90°C using steam, it is possible to increase the workability of the first fabric. have.

In addition, according to the interior material manufacturing method for minimizing the deep drawing molding according to the present invention, since the third step can form the core after the press mold is preheated, the first fabric may be formed by a temperature difference between the first fabric and the press mold. Deterioration of workability and deformation can be prevented.

In addition, according to the method for manufacturing an interior material that minimizes deep drawing molding according to the present invention, in the fourth step, since the reinforcing structure can be further injection-molded on the rear surface of the core, the rigidity and assembly properties of the interior material can be secured.

In addition, according to the interior material manufacturing method that minimizes deep drawing molding according to the present invention, in the fifth step, since the skin can be formed by IMG molding, the skin molding can be automated with the IMG mold, and a predetermined pattern is formed on the skin surface. can do.

In addition, according to the interior material manufacturing method for minimizing deep drawing molding according to the present invention, the fifth step is to form a skin after preheating the core and the second fabric, but the second fabric is transparent, and the second fabric is impregnated into the core. As a result, the pattern and texture of the core can be exposed to the outside of the skin, so that the processability of the second fabric can be increased, and the user can feel the pattern and texture of the core.

In addition, according to the interior material manufacturing method for minimizing deep drawing molding according to the present invention, the second fabric may be made of a transparent film and a transparent sheet having a predetermined pattern bonded to the transparent film, so that the user can determine the pattern and texture of the core. At the same time, you can feel the pattern formed on the transparent sheet and secure the durability of the skin.

In addition, according to the interior material manufacturing method for minimizing deep drawing molding according to the present invention, since the second fabric may include an optical fiber for illumination between the transparent film and the transparent sheet, the optical fiber can be used to form lighting representing letters or shapes, etc. I can.

In addition, according to the interior material manufacturing method for minimizing deep drawing molding according to the present invention, in the fourth step, a transparent cushion layer is first injection molded on the front surface of the core, and then pockets on the rear surface of the core can be injection molded. It can absorb a losing shock or block external noise and provide a cushioning feeling to the user.

1 is a flowchart schematically showing a method for manufacturing an interior material that minimizes deep drawing molding according to an embodiment of the present invention.
2 is a cross-sectional view schematically showing a preheating process of a first fabric in a method for manufacturing an interior material that minimizes deep drawing molding according to an embodiment of the present invention.
3 is a cross-sectional view schematically showing a core forming process using a press mold in a method for manufacturing an interior material that minimizes deep drawing molding according to an embodiment of the present invention.
4 is a cross-sectional view schematically showing preparation for molding a pocket on a core with an injection mold in a method for manufacturing an interior material that minimizes deep drawing molding according to an embodiment of the present invention.
5 is a cross-sectional view schematically illustrating injection for molding a pocket or a reinforcing structure in a core with an injection mold in a method for manufacturing an interior material that minimizes deep drawing molding according to an embodiment of the present invention.
6 is a cross-sectional view schematically illustrating a process of forming a skin with a second fabric in a method for manufacturing an interior material that minimizes deep drawing molding according to an embodiment of the present invention.
7 is a cross-sectional view schematically illustrating injection for molding a cushion layer on a core with an injection mold in a method for manufacturing an interior material that minimizes deep drawing molding according to an embodiment of the present invention.
8 is a schematic cross-sectional view and a partial enlarged view of an interior material in which a cushion layer and a skin are combined with a core in a method for manufacturing an interior material that minimizes deep drawing molding according to an embodiment of the present invention.

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

However, in describing the present invention, descriptions of functions or configurations that are already known will be omitted in order to clarify the gist of the present invention.

Each direction described below is based on this, except for a case otherwise specifically limited.

In the description and claims of the invention, the upper (upper), lower (lower), left and right (lateral or lateral), front (front, front), rear (fold, rear), etc., which refer to directions, etc. For convenience of explanation, it is determined based on the relative position between the drawings and the components, and each direction described below is based on this, except for cases specifically limited differently.

Referring to Figure 1, the interior material manufacturing method for minimizing the deep drawing molding according to an embodiment of the present invention, a first step of preparing a first fabric (10); A second step of preheating the first fabric 10 with a heater 200; Putting the first fabric 10 in a press mold 300 and compressing the first fabric 10, the first fabric 10 is molded into an interior material 100, and at the same time, in the first fabric 10 All or part of the first area 12 surrounding the shape of the interior material 100 and the second area 14 requiring deep drawing molding in order to form the pocket 130 in the shape of the interior material 100 are cut out to form a core ( A third step of molding 110); Injecting the core 110 into the injection mold 400 and injection-molding the pocket 130 coupled to the rear surface (lower surface) of the core 110 so as to surround the portion from which the second region 14 has been removed. Step 4; And a fifth step of forming a skin 120 coupled to the core 110 and the pocket 130 by wrapping the front surface (upper surface) of the core 110 on which the pocket 130 is formed with a second fabric 20. Including, all or part of the pocket 130 may be formed by injection molding instead of deep drawing molding.

Referring to FIG. 2, the first step is a process of preparing the first fabric 10 for forming the core 110.

The first fabric 10 is preferably a natural fiber polypropylene (NFPP) felt, and the natural fiber polypropylene is one of a biocomposite by mixing natural fiber and polypropylene. It is an eco-friendly material made.

Natural fibers are largely classified into vegetable fibers and animal fibers depending on the raw material.

Vegetable natural fibers are mainly composed of cellulose components, animal natural fibers are mainly protein components, and vegetable natural fibers are inexpensive and can be easily obtained, and have the advantage of not being depleted as long as agriculture continues.

When natural fibers are used as reinforcing materials for synthetic polymers, it can flexibly cope with various environmental regulations without modification of the existing production process of synthetic polymers.

The natural fiber polypropylene felt is compressed with a press mold 300 in the third step to form a board and is molded into an interior material 100.

Referring to FIG. 2, the second step is a process of preheating using a heater 200 before molding the first fabric 10.

Heating the first fabric 10 in advance with a heater 200 increases the workability of the first fabric 10 in the process of processing the first fabric 10 with the press mold 300 in the third step. This is to do.

In the second step, the heater 200 may preheat the first fabric 10 to 80 to 90°C using steam.

When the first fabric 10 is the natural fiber polypropylene felt, the natural fiber polypropylene felt may be preheated by using water vapor in the heater 200, and the high temperature water vapor penetrates into the natural fiber polypropylene felt. The processability of natural fiber polypropylene felt is better.

Referring to FIG. 3, the third step is a process of forming the core 110 by processing the preheated first fabric 10.

The core 110 corresponds to the skeleton of the interior material 100 and is inserted into the injection mold 400 to injection-mold the pocket 130 in the fourth step.

In the third step, the first fabric 10 is processed using a press mold 300.

The press mold 300 includes a process of compressing the first fabric 10, a process of forming the first fabric 10 into an interior material 100, and a process of trimming the first fabric 10. As a device for performing, the press mold 300 is composed of an upper mold 310 and a lower mold 320.

The upper mold 310 includes a first molding part 312 capable of forming a portion in which the pocket 130 is formed in the shape of the interior material 100 and a first cutter capable of trimming the first fabric 10 ( 314 and the second cutter 316 are provided on the lower surface.

The first cutter 314 is provided in the first molding part 312 to cover all or part of the second area 14 that needs deep drawing molding to form the pocket 130 in the shape of the interior material 100. Can be cut.

The second cutter 316 may cut the first region 12 surrounding the shape of the interior material 100 from the first fabric 10.

The lower mold 320 has a second molding part 322 into which the first molding part 312 is inserted.

When cutting the first fabric 10, the lower mold 320 may have a cutting groove (not shown) that meshes with the first cutter 314 and the second cutter 316.

The length of the pocket 130 in the vertical direction may be adjusted by adjusting the vertical length of the first and second molding parts 312 and 322.

In order to form the pocket 130 by deep drawing molding as in the prior art, the length of the first molding part 312 and the second molding part 322 in the vertical direction should be lengthened, but the first molding according to an embodiment of the present invention The length of the part 312 and the second molding part 322 may be shortened in the vertical direction.

When the preheated first fabric 10 is inserted and pressed between the upper mold 310 and the lower mold 320 of the press mold 300, the first fabric 10 is compressed to form a board, and the first fabric 10 ) Is molded in the form of the interior material 100.

The first molding part 312 provided on the lower surface of the upper mold 310 may press the first fabric 10 downward to form a portion to which the pocket 130 is joined by injection molding in the fourth step. .

The first region 12 surrounding the portion of the first fabric 10 formed in the shape of the interior material 100 is cut by the second cutter 316.

A portion of the first fabric 10 pressed by the first molding part 312 corresponds to a second region 14, and the second region 14 is a second region provided in the first molding part 312. It is cut by one cutter 314.

A portion of the first fabric 10 molded in the form of the interior material 100 by the press mold 300 except for the first region 12 and the second region 14 corresponds to the core 110.

After forming the core 110, the press mold 300 is opened to take out the core 110, and the first region 12 and the second region 14 are removed.

In the third step, the core 110 may be formed by processing the preheated first fabric 10 after the press mold 300 is preheated.

When the preheated first fabric 10 is processed with a press mold 300, the workability of the first fabric 10 may be reduced due to a temperature difference between the first fabric 10 and the press mold 300. In addition, there may be a problem in that the quality of the core 110 is deteriorated due to the deformation of the first fabric 10.

When the press mold 300 is preheated, the problem occurring due to a temperature difference between the preheated first fabric 10 and the preheated first fabric 10 may be prevented.

Referring to FIG. 4, the fourth step is a process of inserting the core 110 into an injection mold 400 and injection molding the pocket 130 coupled to the core 110.

The injection mold 400 is a device for forming a pocket 130 formed by conventional deep drawing molding by injection molding, and the injection mold 400 includes an upper mold 410 and a lower mold 420.

The upper mold 410 may fix the core 110 inserted into the lower mold 420.

The upper mold 410 may be formed with a first injection groove 412 for injection molding the cushion layer 140 on the upper surface of the core 110 on the lower surface, and the first injection groove 412 is an external It may be connected through the second injection machine 600 and the first flow path 414.

The lower mold 420 is a device in which the core 110 is seated on an upper surface and a pocket 130 is injection-molded on the lower surface of the core 110.

The lower mold 420 includes a first molding groove 422 in which the core 110 is seated on an upper surface and a third injection groove 426 for injection molding the pocket 130 on the lower surface of the core 110. Can be formed.

The third injection groove 426 may be connected to an external first injection machine 500 and a second flow passage 428.

The lower mold 420 may be formed with a second injection groove 424 for injection-molding the reinforcing structure 150 on the lower surface of the core 110 in the first molding groove 422, and the second injection The groove 424 may be connected to an external first injector 500 through a second flow path 428.

The second passage 428 connecting the first injection machine 500 and the third injection groove 426 is a second passage 428 connecting the first injection machine 500 and the second injection groove 424 ) Can be formed independently of each other.

The first injection machine 500 may be independently connected to the second injection groove 424 and the third injection groove 426 through the second passage 428, but may be connected at the same time.

When the first molten resin 30 is injected from the first injection machine 500 after inserting and fixing the core 110 in the injection mold 400, the first molten resin 30 becomes the second flow path 428. The third injection groove 426 is filled through.

When the first molten resin 30 filling the third injection groove 426 is cooled, the pocket 130 is formed.

In the fourth step, the reinforcing structure 150 may be further injection-molded on the rear surface of the core 110.

The reinforcing structure 150 is a structure for securing the stiffness and assembly properties of the interior material 100, and may be a structure for reinforcing the rigidity of the interior material 100 or a structure for connecting the interior material 100 and other parts. .

The reinforcing structure 150 may be injection-molded at a portion where the core 110 and the pocket 130 are coupled, and the reinforcing structure 150 has a bonding force and rigidity between the core 110 and the pocket 130 Can be reinforced.

When the first molten resin 30 is injected from the first injector 500, the first molten resin 30 fills the second injection groove 424 through the second flow path 428.

When the first molten resin 30 filling the second injection groove 424 is cooled, the reinforcing structure 150 is formed.

The pocket 130 and the reinforcing structure 150 may be injection-molded using melted resins of different materials.

Referring to FIG. 7, in the fourth step, a cushion layer 140 may be further injection-molded on the front surface of the core 110.

The upper mold 410 of the injection mold 400 may have a first injection groove 412 formed, and through the first passage 414 to the second injection machine 600 in the first injection groove 412 When the second molten resin 40 is injected, the cushion layer 140 may be formed.

The cushion layer 140 may absorb an impact applied to the interior material 100 or block external noise and provide a cushioning feeling to the user.

Referring to FIG. 6, the fifth step is a process of forming the skin 120 on the core 110 to which the pocket 130 is coupled.

The skin 120 is formed by wrapping the front surface of the core 110 to which the pocket 130 is coupled with the second fabric 20.

The skin 120 may be coupled to the core 110 and the pocket 130, and the skin 120 may be coupled to the rear surface of the core 110 while surrounding the side surface of the core 110.

The process of forming the skin 120 on the core 110 to which the pocket 130 is coupled may be performed manually, but an IMG molding method may be used.

The injection mold 400 can be used to form the skin 120 using the IMG molding method, and the skin 120 molding can be automated with a separate IMG mold, and a predetermined pattern can be formed on the surface of the skin 120. Can be formed.

In the fifth step, the skin 120 may be formed after preheating the core 110 and the second fabric 20 to which the pockets 130 are combined.

After preheating the core 110 to which the pockets 130 are combined, wrapping it with the preheated second fabric 20 increases the workability and bonding force of the second fabric 20 to obtain a skin 120 of excellent quality. I can.

The second fabric 20 may be made of a transparent material.

When the second fabric 20 is transparent, the core 110 to which the pocket 130 is coupled can be observed with the naked eye through the skin 120.

The second fabric 20 may be impregnated into the core 110.

When the second fabric 20 is impregnated in the core 110, the pattern and texture of the core 110 can be exposed to the outside of the skin 120, so that the user can feel the pattern and texture of the core 110. .

The second fabric 20 may be formed of a transparent film 122 and a transparent sheet 124 having a predetermined pattern bonded to the transparent film 122.

When the skin 120 is formed with the second fabric 20 made of the transparent film 122 and the transparent sheet 124, the user feels the pattern and texture of the core 110 and is formed on the transparent sheet 124 at the same time. The pattern can also be felt, and since the skin 120 is formed in a double layer, durability of the skin 120 can be secured.

Referring to FIG. 8, the second fabric 20 may include an optical fiber 126 for illumination between the transparent film 122 and the transparent sheet 124.

Letters, shapes, and pictures can be expressed using the optical fiber 126, and when light is sent through the optical fiber 126, the user can observe it with the naked eye, so that the optical fiber 126 is illuminated by lighting such as a mood lamp. Can be used.

7 to 8, in the fourth step, after injection-molding the transparent cushion layer 140 on the front surface of the core 110, the pocket 130 is injection-molded on the rear surface of the core 110. I can.

The upper mold 410 of the injection mold 400 may have a first injection groove 412 formed, and through the first passage 414 to the second injection machine 600 in the first injection groove 412 When the second molten resin 40 is injected, the transparent cushion layer 140 may be formed.

The transparent cushion layer 140 can absorb shocks applied to the interior material 100 or block external noise and provide a cushioning feeling to the user, and at the same time, the user can feel the pattern and texture of the core 110.

When the transparent cushion layer 140 is formed on the entire surface of the core 110, the skin 120 coupled to the entire surface of the core 110 is coupled to the entire surface of the transparent cushion layer 140.

In the above, although specific embodiments of the present invention have been described and illustrated, the present invention is not limited to the described embodiments, and various modifications and variations can be made without departing from the spirit and scope of the present invention. It is self-evident to those who have.

Therefore, such modifications or variations should not be individually understood from the technical spirit or viewpoint of the present invention, and the modified embodiments should be said to belong to the claims of the present invention.

10: first fabric 12: first area
14: second area 20: second fabric
30: first molten resin 40: second molten resin
100: interior material 110: core
120: skin 122: transparent film
124: transparent sheet 126: optical fiber
130: pocket 140: cushion layer
150: reinforcement structure 200: heater
300: press mold 310: upper mold
312: first molding part 314: first cutter
316: second cutter 320: lower type
322: second molding unit 400: injection mold
410: hieroglyph 412: first injection groove
414: first euro 420: lower brother
422: first molding groove 424: second injection groove
426: 3rd injection groove 428: 2nd euro
500: first injection machine 600: second injection machine

Claims (10)

A first step of preparing a first fabric;
A second step of preheating the first fabric with a heater;
Putting the first fabric in a press mold and forming the first fabric into an interior material shape while compressing the first fabric, and at the same time forming a first area surrounding the interior material shape in the first fabric and a pocket in the interior material shape A third step of forming a core by cutting out all or a part of the second area requiring deep drawing molding for the purpose;
A fourth step of inserting the core into an injection mold and injection-molding the pocket coupled to the rear surface of the core so as to surround the portion from which the second region has been removed; And
Including a fifth step of forming a skin coupled to the core and the pocket by wrapping the front surface of the core on which the pocket is formed with a second fabric,
An interior material manufacturing method for minimizing deep drawing molding, characterized in that all or part of the pocket is formed by injection molding instead of deep drawing molding. The method of claim 1,
The first step is an interior material manufacturing method for minimizing deep drawing molding, characterized in that the first fabric is a felt made of natural fiber polypropylene. The method of claim 2,
The second step is the interior material manufacturing method for minimizing deep drawing molding, characterized in that the heater preheats the first fabric to 80 ~ 90 ℃ using water vapor. The method of claim 3,
In the third step, the interior material manufacturing method for minimizing deep drawing molding, characterized in that the core is molded after the press mold is preheated. The method of claim 4,
The fourth step is an interior material manufacturing method for minimizing deep drawing molding, characterized in that the reinforcing structure is further injection-molded on the rear surface of the core. The method of claim 5,
In the fifth step, the interior material manufacturing method for minimizing deep drawing molding, characterized in that the skin is formed by IMG molding. The method according to any one of claims 1 to 6,
In the fifth step, the skin is formed after preheating the core and the second fabric,
The second fabric is transparent,
The second fabric is impregnated in the core, so that the pattern and texture of the core are exposed to the outside of the skin. The method of claim 7,
The second fabric is made of a transparent film and a transparent sheet with a predetermined pattern bonded to the transparent film, characterized in that the interior material manufacturing method for minimizing deep drawing molding. The method of claim 8,
The second fabric is an interior material manufacturing method for minimizing deep drawing molding, characterized in that it comprises an optical fiber for illumination between the transparent film and the transparent sheet. The method of claim 9,
In the fourth step, a transparent cushion layer is first injection-molded on the front surface of the core, and then the pocket is injection-molded on the rear surface of the core.

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