KR102554757B1 - Film heater and vehicle heating interior panel including the same and method for manufacturing vehicle heating interior panel - Google Patents

Abstract

The present invention relates to a film heating element, a heating interior material for a vehicle including the same, and a method for manufacturing the same, wherein the film heating element includes a bendable base layer, a first electrode layer laminated on the base layer, and adjacent to the first electrode layer. A second electrode layer laminated on the base layer, a heating layer laminated to electrically connect the first electrode layer and the second electrode layer and generating heat when the first electrode layer and the second electrode layer are connected to a power source, and the heating layer and an insulating layer stacked on the heating layer to electrically insulate the first electrode layer and the second electrode layer, and a cover layer stacked on the insulating layer and exposed to the outside. With this configuration, the heating element can be manufactured in the form of a bendable film to minimize the thickness of the internal heating material and to have a curved shape, thereby obtaining an effect of securing application diversity.

Description

Film heating element, vehicle heating interior material including the same, and manufacturing method thereof

The present invention relates to a film heating element, a heating interior material for a vehicle including the same, and a method for manufacturing the same, and more particularly, to a heating element for a vehicle produced by manufacturing a heating element in the form of a film and using the same, and a manufacturing method thereof.

Since the cooling water is not sufficiently heated at the beginning of startup in the winter season, the interior of the vehicle cannot be quickly heated, so a radiant heat heater can be installed in the interior of the vehicle to improve heating comfort by directly emitting radiant heat to the occupants using radiant heat. there is.

These radiant heat heaters for vehicles are installed on the lower side of the dashboard, the steering column on the driver's seat side, the glove box on the passenger seat side, the backrest of the front seat, etc., and emit radiant heat directly toward the legs of the occupant, thereby providing rapid heating. is making it possible to

For example, in a conventional radiant heater device, the radiant heater device is installed on the lower surface of a steering column connected to a steering wheel of a driver's seat of a vehicle to emit radiant heat toward the legs of a seated occupant. Such a radiant heater device is configured in a form in which a heat dissipation part, a heating wire pad composed of a heating wire, and a terminal are formed on a substrate.

However, since such a conventional radiant heat heater is manufactured using a hot wire, it is difficult to secure an installation space because the hot wire pad is formed thick.

In addition, since the heating pad is used, it is difficult to form the heating pad in a curved shape corresponding to the shape of the vehicle.

Korean Patent Publication No. 2019-0111678 (2019.10.02)

The present invention was invented to solve the above problems, and provides a film heating element capable of minimizing the thickness of the heating interior material by manufacturing the heating element in the form of a film, a heating interior material for a vehicle including the same, and a manufacturing method thereof. There is a purpose.

And, according to the present invention, to provide a film heating element that can have a curved shape corresponding to the shape of a vehicle having a curve using a bendable film heating element, a heating interior material for a vehicle including the same, and a manufacturing method thereof there is

In order to achieve the above object, a film heating element according to a preferred embodiment of the present invention includes a base layer capable of being bent and deformed; a first electrode layer laminated on the base layer; a second electrode layer adjacent to the first electrode layer and stacked on the base layer; a heating layer stacked to electrically connect the first electrode layer and the second electrode layer, and generating heat when the first electrode layer and the second electrode layer are connected to a power source; an insulating layer laminated on the heating layer to electrically insulate the heating layer from the first electrode layer and the second electrode layer; and a cover layer laminated on the insulating layer and exposed to the outside.

Here, the insulating layer may be formed to insulate while adhering the cover layer to the heating layer by applying a silicone adhesive.

In addition, the cover layer may be made of fabric or leather material.

Here, the cover layer may be formed to be larger than the base layer, and may be stacked such that an outer circumferential portion protrudes outward of the base layer.

In order to achieve the above object, a heating interior material for a vehicle according to a preferred embodiment of the present invention includes a molding layer coupled to a vehicle; A foam layer laminated on the molding layer by insert foaming; and a film heating element laminated on the foam layer.

Here, the cover layer may be formed larger than the base layer so that an outer circumferential portion protruding outward of the base layer surrounds the shaping layer and is stacked.

In order to achieve the above object, a method for manufacturing a heating interior material for a vehicle according to a preferred embodiment of the present invention includes a molding layer manufacturing step of manufacturing a molding layer coupled to a vehicle by injection molding; A film heating element manufacturing step of manufacturing a film heating element that generates heat by receiving power from the outside; a shaping layer inserting step of inserting the shaping layer into a first mold; A film heating element inserting step of inserting the film heating element into a second mold; a foaming liquid application step of applying a foaming liquid on the molding layer or the film heating element; and a foam layer forming step of forming a foam layer by foaming a foam liquid after molding the first mold and the second mold.

For example, the film heating element manufacturing step may include an electrode layer forming step of forming the first electrode layer and the second electrode layer on the base layer; a heating layer forming step of stacking the heating layer to connect the first electrode layer and the second electrode layer; an insulating layer forming step of forming the insulating layer to electrically insulate the heating layer from the first electrode layer and the second electrode layer; and a cover layer forming step of forming a cover layer exposed to the outside by being laminated on the insulating layer.

In the insulating layer forming step, the insulating layer may be formed by applying a silicone adhesive on the heating layer, the first electrode layer, and the second electrode layer, and then laminating the cover layer to adhere the cover layer.

Alternatively, in the insulating layer forming step, the insulating layer may be formed by applying a silicone adhesive to the cover layer and then laminating the cover layer on the heating layer to adhere the cover layer.

In the step of inserting the film heating element, the film heating element is fixed to the second mold by vacuum adsorption.

In the step of forming the foam layer, the outer circumference of the film heating element may be formed to contact the outer circumference of the molding layer to form a foam layer in the foam space sealed by the film heating element.

The forming of the cover layer may be performed by forming the cover layer to be larger than the base layer and stacking such that an outer peripheral portion of the cover layer protrudes outward from the base layer.

In this case, in the step of forming the foam layer, the outer circumference of the cover layer may be formed to contact the first mold to form a foam layer in a foam space sealed by the cover layer.
After forming the foam layer, the outer circumferential portion of the cover layer protruding outward of the base layer wraps the foam layer and the molded layer together while laminating the end of the cover layer to be received inside the molded layer A cover layer finishing step; may be further included.

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According to the film heating element according to the present invention, a heating interior material for a vehicle including the same, and a manufacturing method thereof, the thickness of the heating interior material can be minimized by manufacturing the heating element in the form of a film, so that the installation space can be minimized.

And, according to the present invention, it can be manufactured to have a curved shape corresponding to the shape of a vehicle having a curve using a bendable deformable film heating element, so it is possible to obtain an effect of securing application diversity.

1 is a view schematically showing a film heating element according to an embodiment of the present invention;
2 is a cross-sectional view schematically showing a state in which a cover layer is formed in a film heating element according to an embodiment of the present invention;
3 is a flowchart schematically showing a method for manufacturing a heating interior material for a vehicle according to an embodiment of the present invention;
4 is a view schematically showing a method for manufacturing a heating interior material for a vehicle according to an embodiment of the present invention;
5 is a view schematically showing a state in which a film heating element is disposed in a mold in a method for manufacturing a heating interior material for a vehicle according to an embodiment of the present invention;
6 is a flowchart schematically showing the steps of manufacturing a film heating element in a method for manufacturing a heating interior material for a vehicle according to an embodiment of the present invention;
7 is a cross-sectional view schematically showing a heating interior material for a vehicle 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.

Since the present invention can make various changes and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. This is not intended to limit the present invention to specific embodiments, and should be construed as including all changes, equivalents, or substitutes included in the spirit and technical scope of the present invention.

In describing the present invention, terms such as first and second may be used to describe various components, but the components may not be limited by the terms. These terms are only for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present invention.

The term "and/or" may include any combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected or connected to the other component, but other components may exist in the middle. can be understood On the other hand, when an element is referred to as “directly connected” or “directly connected” to another element, it may be understood that no other element exists in the middle.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions may include plural expressions unless the context clearly dictates otherwise.

In this application, terms such as "comprise" or "having" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features It may be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Unless defined otherwise, all terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries may be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, interpreted in an ideal or excessively formal meaning. It may not be.

In addition, the following embodiments are provided to more completely explain to those with average knowledge in the art, and the shapes and sizes of elements in the drawings may be exaggerated for clearer explanation.

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

1 is a view schematically showing a film heating element according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view schematically showing a state in which a cover layer is formed in the film heating element.

1 and 2, the film heating element 300 according to an embodiment of the present invention includes a base layer 310 that can be bent and deformed, a first electrode layer 320 laminated on the base layer 310, and the A second electrode layer 330 adjacent to the first electrode layer 320 and laminated on the base layer 310 is laminated to electrically connect the first electrode layer 320 and the second electrode layer 330, and The heating layer 340, which generates heat when the first electrode layer 320 and the second electrode layer 330 are connected to a power source, and the heating layer 340, the first electrode layer 320, and the second electrode layer 330 It may include an insulating layer 350 laminated on the heating layer 340 to protect it, and a cover layer 360 laminated on the insulating layer 350 and exposed to the outside.

Corresponding to the shape of the object to which the base layer 310 is attached, it is made in the form of a film capable of being elastically bent. For example, the base layer 310 may be made of a PI film.

The first electrode layer 320 and the second electrode layer 330 may be formed of a metal such as copper (Cu), aluminum (Al), or silver (Ag). This electrode layer may be formed to have a thickness of 50 to 80 μm.

The first electrode layer 320 and the second electrode layer 330 may be formed by performing a printing process or an etching process. Forming the electrode layer through the printing process or the etching process is a well-known technique, and a detailed description thereof will be omitted.

The heating layer 340 is stacked to electrically connect the first electrode layer 320 and the second electrode layer 330, and when the first electrode layer 320 and the second electrode layer 330 are connected to a power source, It is an exothermic composition.

The heating layer 340 may be formed on top of the first electrode layer 320 and the second electrode layer 330 by a printing process. Forming the heating layer through the printing process is a well-known technique, and a detailed description thereof will be omitted.

The heating layer 340 has a higher resistance than the first electrode layer 320 and the second electrode layer 330 in order to generate heat when the first electrode layer 320 and the second electrode layer 330 are connected to a power source. made of material

For example, the heating layer 340 may be formed using carbon nanotubes (CNT) or carbon powder.

The insulating layer 350 is laminated on the heating layer 340 to protect the heating layer 340 , the first electrode layer 320 , and the second electrode layer 330 . That is, when power is applied to the heating layer 340, the first electrode layer 320, and the second electrode layer 330, the insulating layer 350 is provided to insulate the cover layer 360 so that electricity does not flow therethrough. It can be.

For example, the insulating layer 350 may be laminated to insulate while adhering the cover layer 360 to the heating layer 340 by applying a silicone adhesive. Here, it is preferable to use an adhesive capable of maintaining adhesive strength even at high temperatures while insulating electricity as the silicone adhesive. That is, since heat is generated in the heating layer 340, the adhesive strength should be maintained even at a high temperature.

The insulating layer 350 may be formed to a thickness of 30 to 50 μm to achieve electrical insulation while maintaining adhesive strength.

The cover layer 360 is laminated on the insulating layer 350 and exposed to the outside.

For example, fabric, artificial leather, or natural leather may be used as the cover layer 360 to improve a user's sense of touch. Preferably, the cover layer 360 may be made of the same material as the material of the location where the heating interior material for the vehicle is fastened. For example, when the interior heating material for a vehicle is installed below the dashboard inside the vehicle, the cover layer 360 may be made of the same material as the surface material of the dashboard.

And, as shown in (a) of FIG. 2, the cover layer 360 is formed to be larger than the base layer 310, and the outer circumferential portion is laminated so that it protrudes outward from the base layer 310. can

That is, in the method of manufacturing a heat generating interior material for a vehicle according to an embodiment of the present invention described below, the outer circumferential portion of the cover layer 360 protrudes outward from the base layer 310 while wrapping the molding layer 100 and stacking it. can do.

Through this, since the base layer 310 is not exposed to the outside and is covered by the cover layer 360, the appearance quality can be improved.

Of course, as shown in (b) of FIG. 2 , the cover layer 360 may be stacked to have the same size as the base layer 310 .

Hereinafter, a method for manufacturing a heating interior material for a vehicle according to an embodiment of the present invention will be described with reference to the accompanying drawings.

3 is a flow chart schematically illustrating a manufacturing method of the heating interior material for a vehicle, and FIG. 4 is a diagram schematically showing the manufacturing method of the heating interior material for a vehicle. And, FIG. 5 is a view schematically showing a state in which the film heating element is disposed in the mold in the method for manufacturing a heating interior material for a vehicle.

3 to 5, the method for manufacturing a heating interior material for a vehicle according to an embodiment of the present invention includes a molding layer manufacturing step (S110) of manufacturing a molding layer 100 coupled to a vehicle by injection molding, and supplying power from the outside. A film heating element manufacturing step (S120) of manufacturing a film heating element 300 that receives heat and generates heat, a molding layer inserting step (S130) of inserting the molding layer 100 into the first mold 10, and a second mold ( 20) a film heating element inserting step of inserting the film heating element 300 (S140), a foaming liquid application step of applying the foaming liquid 201 on the film heating element 300 (S150), and the first mold (10) and a foam layer forming step (S160) of forming the foam layer 200 by molding the foam liquid 201 after molding the second mold 20.

The molding layer manufacturing step (S110) is a step of manufacturing the molding layer 100 installed on the lower side of the dashboard in the vehicle, the steering column on the driver's seat side, the glove box on the passenger seat side, and the backrest of the front seat. . That is, this is a step of manufacturing the molding layer 100 for installing the film heating element 300, which is a heat source that generates heat and emits radiant heat to the interior space of the vehicle, in the interior of the vehicle.

For example, in the molding layer manufacturing step ( S110 ), molding layers 100 having various shapes to be installed in various locations inside a vehicle may be manufactured. Here, the molding layer 100 may be manufactured by injecting a resin. In addition, the shaping layer 100 may be manufactured in a form having a curved surface corresponding to the shape of the location where it is installed.

The molding layer inserting step (S130) is a step of inserting the molding layer 100 manufactured in the molding layer manufacturing step (S110) into the first mold 10. That is, this is the step of installing the shaping layer 100 on the first mold 10 .

For example, the shaping layer 100 may be inserted into the first mold 10 through vacuum adsorption. Alternatively, the shaping layer 100 may be inserted into the first mold 10 in a fitting manner. That is, any known method can be applied as long as the molding layer 100 can be inserted into the first mold 10 .

The film heating element inserting step (S140) is a step of inserting the film heating element 300, which is manufactured in the form of a film and formed as a heating element that generates heat when power is supplied, into the second mold 20.

As shown in FIG. 1, the film heating element 300 includes a first electrode layer 320 and a second electrode layer 330 on a base layer 310 in the form of a bendable film such as a polyimid (PI) film, and A heating layer 340 that generates heat when power is applied is laminated and manufactured.

The film heating element 300 has a very thin thickness compared to a conventional heating pad manufactured using a hot wire. In addition, since the base layer 310 of the film heating element 300 is made of a material capable of elastic bending and deformation, the film heating element 300 is easily bent and deformed along the curved surface formed in the second mold 20, 2 can be inserted into the mold (20).

For example, in the step of inserting the film heating element (S140), the film heating element 300 may be fixed to the second mold 20 by vacuum adsorption. To this end, a vacuum exhaust passage 21 may be formed in the second mold 20 .

That is, since the film heating element 300 is manufactured to be bendable, when the film heating element 300 is seated in the second mold 20 and air is sucked from the vacuum exhaust passage 21, the film heating element ( 300) is placed in close contact with the mold surface of the second mold 20. At this time, even if a curved shape is formed on the mold surface of the second mold 20, the film heating element 300 is tightly fixed to the mold surface while being bent and deformed in response thereto.

The foaming liquid applying step (S150) is a step of applying the foaming liquid 201 on the film heating element 300 inserted into the second mold 20 through the foaming liquid supply nozzle 30.

Here, various types of foaming liquids such as foamed polyurethane, foamed polypropylene, and foamed polyethylene may be used as the foamed liquid 201 .

For example, in the present invention, foamed polyurethane, which constitutes an interior material for a vehicle and is formed in a sponge shape after foaming and has excellent cushioning and heat insulating properties, can be used as the foamed liquid 201 .

In the foaming liquid applying step (S150), a predetermined amount of foaming liquid 201 may be supplied through the foaming liquid supply nozzle 30. For example, the supply amount of the foaming liquid may be set to correspond to the thickness of the foam layer 200 .

In the drawings, the foaming liquid 201 is shown to be applied to the film heating element 300, but is not limited thereto, and when the molding layer is formed concavely, the foaming liquid may be applied to the molding layer.

The foam layer forming step (S160) is a step of forming the foam layer 200 by molding the first mold 10 and the second mold 20 and then foaming the foam liquid 201. That is, in a state where the shaping layer 100 is inserted into the first mold 10 and the film heating element 300 is inserted into the second mold 20, the first mold 10 is The foam layer 200 is formed by moving the molded layer 100 to the second mold 20 so as to have a gap with the film heating element 300 at regular intervals. At this time, the distance between the molding layer 100 and the film heating element 300 constitutes the thickness of the foam layer 200.

Through the foam layer forming step (S160), the foam layer 200 can be integrally formed on one side of the molding layer 100 without using a separate adhesive, and the foam layer 200 The film heating element 300 may be integrally formed without using a separate adhesive or the like.

Furthermore, the foam layer 200 formed through the foam layer forming step (S160) is disposed to be covered by the film heating element 300 so as not to be exposed to the outside.

To this end, the film heating element 300 may be formed to be larger than the foaming space, so as to form the foam layer 200 in the foaming space sealed by the film heating element 300 .

For example, as shown in (a) of FIG. 5, the outer circumference of the film heating element 300 is formed to contact the outer circumference of the molding layer 100, and sealed by the film heating element 300. It may be made to form the foam layer 200 in the foam space.

That is, the outer circumference of the film heating element 300 is disposed above the foaming space on the inner surface of the second mold 20, and the first mold 10 is attached to the second mold 20. When molded, the end of the outer circumference of the molding layer 100 provided in the first mold 10 may be placed in contact with the inner circumferential surface while being inserted into the film heating element 300.

In this way, a closed foaming space is formed by the film heating element 300 and the molding layer 100, and the foamed liquid is foamed in the foaming space without leaking to the outside by the closed foaming space, thereby forming the foamed layer 200. will form

In this case, when the film heating element 300 is formed as shown in (a) of FIG. 2, the outer peripheral portion of the cover layer 360 protruding outward from the base layer 310 in the film heating element 300 is It may be disposed above the foaming space on the inner surface of the second mold 20 to contact an end of the outer circumference of the shaping layer 100 .

Alternatively, when the film heating element 300 is formed as shown in (b) of FIG. 2, the outer circumferential portion of the base layer 310 is located above the foaming space on the inner surface of the second mold 20. It may be arranged to contact the end of the outer circumference of the shaping layer 100.

As another example, as shown in (b) of FIG. 5, the outer circumference of the film heating element 300 is formed to contact the first mold 10, and the foaming space is sealed by the film heating element 300. It may be made to form the foam layer 200 on.

That is, the outer circumference of the film heating element 300 extends from the second mold 20 to the outside of the mold surface in contact with the first mold 10 and is disposed so as to surround the molding layer 100. .

In this case, it is preferable that the film heating element 300 is formed as shown in (a) of FIG. 2 . That is, the outer circumferential portion of the cover layer 360 protruding outward from the base layer 310 is disposed above the foaming space on the inner surface of the second mold 20 so that the molding layer 100 It may be arranged to contact the end of the outer circumference of the. In addition, the outer circumferential portion of the cover layer 360 protruding outward from the molding layer 100 is then laminated to surround the molding layer 100 .

In this way, the film heating element 300 is disposed while surrounding the molding layer 100 to form a closed foaming space, and the foamed liquid does not leak to the outside by the closed foaming space and is foamed in the foamed space to form a foamed layer. (200) is formed.

Here, when the film heating element 300 is laminated as shown in (a) of FIG. 5, the film heating element 300 may be laminated so as to protrude outward from the molding layer 100. In this case, a trimming step of cutting a portion protruding outward of the molding layer 100 from the film heating element 300 may be further included.

Referring to FIGS. 1, 2 and 6, the film heating element manufacturing step (S120) is an electrode layer forming step (S121) of forming a first electrode layer 320 and a second electrode layer 330 on the base layer 310 And, a heating layer forming step (S122) of stacking a heating layer 340 to connect the first electrode layer 320 and the second electrode layer 330, and the heating layer 340 and the first electrode layer 320 ) and an insulating layer forming step (S123) of stacking the insulating layer 350 on the heating layer 340 to electrically insulate the second electrode layer 330, and being laminated on the insulating layer 350 and exposed to the outside. It may be made including a cover layer forming step (S124) of forming the cover layer 360 to be.

The electrode layer forming step (S121) is a step of forming the first electrode layer 320 and the second electrode layer 330 on the base layer 310 made of a resin film such as a PI film.

The first electrode layer 320 and the second electrode layer 330 may be formed by performing a printing process or an etching process. Forming the electrode layer through the printing process or the etching process is a well-known technique, and a detailed description thereof will be omitted.

The heating layer forming step ( S122 ) is a step of stacking the heating layer 340 to electrically connect the first electrode layer 320 and the second electrode layer 330 . Here, the heating layer 340 generates heat when the first electrode layer 320 and the second electrode layer 330 are connected to a power source.

In the heating layer forming step ( S122 ), the heating layer 340 may be formed on the first electrode layer 320 and the second electrode layer 330 by a printing process. Forming the heating layer through the printing process is a well-known technique, and a detailed description thereof will be omitted.

The heating layer 340 is more resistant than the first electrode layer 320 and the second electrode layer 330 in order to generate heat when the first electrode layer 320 and the second electrode layer 330 are connected to a power source. It is formed from a large material.

For example, the heating layer 340 may be formed using carbon nanotubes (CNT) or carbon powder.

The insulating layer forming step ( S123 ) is a step of forming the insulating layer 350 electrically insulating the heating layer 340 from the first electrode layer 320 and the second electrode layer 330 .

For example, in the insulating layer forming step (S123), silicone adhesive is applied on the heating layer 340, the first electrode layer 320, and the second electrode layer 330, and then the cover layer 360 is laminated. Thus, the insulating layer 350 may be formed while the cover layer 360 is adhered.

Alternatively, in the insulating layer forming step (S123), silicone adhesive is applied to the cover layer 360 and then the cover layer 360 is laminated on the heating layer 340 to adhere the cover layer 360 to the heat generating layer 340. It may be made to form the insulating layer 350 .

That is, the insulating layer 350 is formed to insulate the heating layer 340, the first electrode layer 320, and the second electrode layer 330 so that electricity does not flow through the cover layer 360 when power is applied. do.

Here, it is preferable to use an adhesive capable of maintaining adhesive strength even at high temperatures while insulating electricity as the silicone adhesive. That is, since heat is generated in the heating layer 340, the adhesive strength should be maintained even at a high temperature.

The cover layer forming step (S124) is a step of forming a cover layer 360 that is laminated on the insulating layer 350 and exposed to the outside.

For example, fabric, artificial leather, or natural leather may be used as the cover layer 360 to improve a user's sense of touch. Preferably, the cover layer 360 may be made of the same material as the material of the location where the heating interior material for the vehicle is fastened. For example, when the interior heating material for a vehicle is installed below the dashboard inside the vehicle, the cover layer 360 may be made of the same material as the surface material of the dashboard.

And, in the cover layer forming step (S124), the cover layer 360 is formed to be larger than the base layer 310, as shown in (a) of FIG. 2, the outer circumference of the cover layer 360 A portion may be stacked so as to protrude outward from the base layer 310 .

Alternatively, in the cover layer forming step (S124), the cover layer 360 is formed to have the same size as the base layer 310, and as shown in (b) of FIG. 2, the cover layer 360 is It may be stacked in the same size as the base layer 310 .

Furthermore, in the method of manufacturing a heat generating interior material for a vehicle according to an embodiment of the present invention, after forming the foam layer 200, the outer circumferential portion of the cover layer 360 protrudes outward from the base layer 310, the molding layer A cover layer finishing step (S170) of laminating while wrapping the (100) may be further included.

That is, as shown in (a) of FIG. 2, when the outer circumferential portion of the cover layer 360 protrudes outward from the base layer 310 in the cover layer forming step (S124), the A cover layer finishing step (S170) may be additionally performed.

Through this, the outer circumferential portion of the cover layer 360 protruding outward of the base layer 310 is laminated while wrapping the molding layer 100 so that the base layer 310 is not exposed to the outside, thereby improving the appearance quality. can improve

Hereinafter, a heating interior material for a vehicle manufactured through the method for manufacturing a heating interior material for a vehicle according to an embodiment of the present invention described above will be described with reference to the accompanying drawings.

7 is a schematic cross-sectional view of the heating interior material for a vehicle.

Referring to FIG. 7 , a heating interior material for a vehicle according to an embodiment of the present invention includes a molding layer 100 coupled to a vehicle, a foam layer 200 laminated on the molding layer 100 by insert foaming, and from the outside. It may include a film heating element 300 that generates heat by receiving power and is laminated on the foam layer 200.

The shaping layer 100 is manufactured in a form for installing the heating interior material for a vehicle to a vehicle. That is, the shaping layer 100 is manufactured in a form fastened to the vehicle structure A.

For example, the shaping layer 100 may be installed on a lower side of a dashboard in a vehicle, a steering column on a driver's seat side, a glove box on a passenger's seat side, a backrest of a front seat, etc. made in the form In addition, the shaping layer 100 may be manufactured in a shape having a curved surface corresponding to the shape of the location where it is installed.

The foam layer 200 may be formed of any one of polyurethane, polypropylene, and polyethylene.

For example, in the present invention, the foam layer 200 may be formed by using foamed polyurethane, which constitutes a vehicle interior material and is formed in a sponge shape after foaming and has excellent cushioning and heat insulating properties, as a foaming liquid.

The film heating element 300 is made of a film-type heating element that generates heat when power is applied. The film heating element 300 described above with reference to FIGS. 1 and 2 is applied.

Here, the film heating element 300 includes a bendable deformable base layer 310, a first electrode layer 320 laminated on the base layer 310, and the base layer adjacent to the first electrode layer 320 ( 310) and the second electrode layer 330 stacked to electrically connect the first electrode layer 320 and the second electrode layer 330, and the first electrode layer 320 and the second electrode layer 330 A heating layer 340 that generates heat when connected to this power source, and an insulating layer laminated on the heating layer 340 to protect the heating layer 340, the first electrode layer 320, and the second electrode layer 330. 350, and a cover layer 360 laminated on the insulating layer 350 and exposed to the outside.

For example, as shown in (a) of FIG. 2 , the cover layer 360 is formed to be larger than the base layer 310, so that the outer circumferential portion of the cover layer 360 is the base layer 310. 7, the outer circumferential portion of the cover layer 360 surrounds the foam layer 200 and the molding layer 100 together, as shown in FIG. The ends are stacked to be accommodated inside the shaping layer 100.

Through this, since the base layer 310 is not exposed to the outside and is covered by the cover layer 360, the appearance quality can be improved.

Alternatively, as shown in (b) of FIG. 2, the cover layer 360 is formed to have the same size as the base layer 310, so that the cover layer 360 has the same size as the base layer 310. can be stacked with In this case, since the step of covering the cover layer is omitted, the process can be simplified.

Although the present invention has been described in detail through specific examples, this is for explaining the present invention in detail, the present invention is not limited thereto, and the present invention is within the technical spirit of the present invention. It is clear that modification or improvement is possible by the person.

All simple modifications or changes of the present invention fall within the scope of the present invention, and the specific protection scope of the present invention will be clarified by the appended claims.

100: molding layer 200: foam layer
300: film heating element 310: base layer
320: first electrode layer 330: second electrode layer
340: heating layer 350: insulating layer
360: cover layer

Claims (14)

delete delete delete delete delete delete A molding layer manufacturing step of manufacturing a molding layer coupled to the vehicle by injection molding;
A film heating element manufacturing step of manufacturing a film heating element that generates heat by receiving power from the outside;
a shaping layer inserting step of inserting the shaping layer into a first mold;
A film heating element inserting step of inserting the film heating element into a second mold;
a foaming liquid application step of applying a foaming liquid on the molding layer or the film heating element; and
A foam layer forming step of forming a foam layer by foaming a foam liquid after molding the first mold and the second mold; including,
The film heating element manufacturing step,
an electrode layer forming step of forming a first electrode layer and a second electrode layer on the base layer;
a heating layer forming step of stacking a heating layer to connect the first electrode layer and the second electrode layer;
forming an insulating layer to electrically insulate the heating layer from the first electrode layer and the second electrode layer; and
A cover layer forming step of forming a cover layer exposed to the outside by being laminated on the insulating layer;
In the step of forming the cover layer,
The cover layer is formed to be larger than the base layer, and the outer circumferential portion of the cover layer is laminated so that it protrudes outward from the base layer,
After forming the foam layer, the outer circumferential portion of the cover layer protruding outward of the base layer wraps the foam layer and the molded layer together while laminating the end of the cover layer to be received inside the molded layer Including; cover layer finishing step,
The step of forming the foam layer,
The outer circumference of the film heating element is formed to extend from the second mold to the outside of the mold surface in contact with the first mold, and a foam layer is formed in the foamed space sealed by the film heating element,
A trimming step of cutting a portion protruding outward from the molding layer from the film heating element;
Method for manufacturing a heating interior material for a vehicle, characterized in that it further comprises.
delete According to claim 7,
The insulating layer forming step,
A method of manufacturing a heating interior material for a vehicle, characterized in that the insulating layer is formed by applying a silicone adhesive on the heating layer, the first electrode layer, and the second electrode layer, and then laminating the cover layer to adhere the cover layer.
According to claim 7,
The insulating layer forming step,
A method of manufacturing a heating interior material for a vehicle, characterized in that, after applying a silicone adhesive to the cover layer, the cover layer is laminated on the heating layer to form the insulating layer while adhering the cover layer.
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