KR101839311B1 - Material with a Warmer and Method for Fabricating the Same - Google Patents

Abstract

The present invention provides a method for manufacturing a single-piece material.
The first mold and the second mold are combined so that the foamed mixture liquid is injected into the cavity formed between the first mold and the second mold to fill a predetermined amount and the filled foamed mixture liquid is foamed to form the pad body. A primary assembling step of manufacturing the pad body; A heat generating line for generating heat when a power is applied to the outer exposed surface of the semi-hardened pad body is formed on one side surface of the pad body by separating one of the first mold and the first mold, The method comprising: disposing a warmer comprising a base layer on a substrate; And a second assembling step of assembling the first mold and the second mold so that the warmer and the pad body mounted on the outer surface of the pad body are integrated with each other, Of the base material melts and disappears in the pad body, and only the heating line of the warmer remains on the outer surface of the pad body.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a method for manufacturing a single-

[0001] The present invention relates to a method of manufacturing a material having a warmer integrally, and more particularly, to a method of manufacturing a material having a warmer, Which can be manufactured by integrally forming a body of a material in a process of foaming and molding a foamed material.

BACKGROUND ART [0002] Generally, various sheets, headrests, and steering wheels including a seat as an interior material of an automobile are manufactured by using a material such as a seat pad manufactured by heating molding a foamed material, Injecting a foaming material into the mold, and then heating the upper and lower molds to a predetermined temperature to expand the volume of the foaming material.

In addition, in a driver, a passenger seat, and a rear seat of an automobile, a heat ray is built in a seat on which a driver or a passenger is seated so as to provide warmth to a driver and a passenger in cold weather in winter, Convenience.

That is, the seat pad manufactured by the foam molding process may be provided with a separate warmer for heating the sheet to supply heat to the sheet, thereby enhancing the convenience of the user.

The conventional method of providing such a warmer to a seat pad is a method of bonding a warmer having a heating wire to an outer surface of a pad body of a foamed sheet pad by bonding using a separately applied adhesive, And sewed in a sewing manner to combine the warmers.

However, in a method in which an adhesive is separately applied to the outer surface of the pad body after the foaming process is completed and a warmer is bonded and bonded thereto via the adhesive, a volatile organic compound (VOC), which is harmful to the human body, is generated during the curing of the applied adhesive The reliability of the pad product is deteriorated, the yield of the product due to the defective application of the adhesive is decreased, and the user is dissatisfied due to the drop of the warmer during use.

In addition, since the curing time is required for a certain period of time until the adhesive for bonding the warmer to the pad body is completely cured, it has been a main cause of deteriorating work productivity on the seat pad.

In addition, a method of sewing a warmer on an outer cover attached to the outside of the seat pad requires a separate sewing step for installing a warmer, so that work productivity is lowered as in the case of the adhesive method, There is a problem that the manufacturing cost is increased.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to solve the above problems, and an object of the present invention is to provide a method of manufacturing a pad- And a method for manufacturing the same, which can be manufactured by simply integrating a warmer into a body of a material in a step of foaming and molding the material.

Another object of the present invention is to provide a warmer-integrated material and a method for manufacturing the same, which can increase the heating efficiency and the heat transfer efficiency by melting and removing the substrate layer provided with the heating wire of the warmer by the heat generated in the foam molding process of the pad material .

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise forms disclosed. It will be possible.

In order to achieve the above object, the present invention provides a method of manufacturing a semiconductor device, comprising: a warmer preparation step of preparing a warmer comprising a substrate layer having a heating wire on one side thereof for generating heat when power is applied; The first mold and the second mold are combined so that the foamed mixture liquid is injected into the cavity formed between the first mold and the second mold to fill the predetermined amount and the filled foamed mixture liquid is foamed and reacted to form the pad body, A primary consolidation step to produce; Separating one of the first mold and the second mold to expose one side of the semi-cured pad body to the outside and dispose the warmer on the exposed surface of the semi-cured pad body; A second molding step in which the first mold and the second mold are assembled so that the heaters and the pad body, which are placed on the outer surface of the semi-curing pad body, are integrated with each other; A heating step of heating the first and second molds for a predetermined period of time to transfer heat of a predetermined temperature to the pad body through the first and second molds, Wherein the base layer of the warmer attached to the outer exposed surface of the semi-hardened pad body includes a base material layer which is formed on the outer surface of the pad body, Only the heating line of the warmer remains on the outer exposed surface of the pad body, the base layer of the warmer can penetrate the foamed mixture liquid, Characterized in that the foamed mixture liquid is made of a fabric material having a melting point capable of melting by the reaction temperature generated in the cavity during foam molding of the foamed mixture liquid Provides a method of operation.

Preferably, the pad body may be an internal material constituting any one of a seat, a back sheet, a headrest, and a steering wheel.

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According to another aspect of the present invention, there is provided a mold comprising: a pad body manufactured by foam molding of a foamed mixed liquid injected into a cavity formed between a first mold and a second mold; At least one warmer integrally provided on the outer surface of the pad body; To provide a warmer integrated material.

Preferably, the substrate layer on which the heating line of the warmer is provided may be made of a material which melts due to the temperature generated during the foam molding of the foam mixture mixture.

Preferably, the pad body may be an internal material constituting any one of a seat, a back sheet, a headrest, and a steering wheel.

Preferably, the base material layer of the warmer may be made of a fabric material so as to allow infiltration of the foamed mixture liquid.

The present invention as described above has the following effects.

(1) It is possible to reduce the number of processes required for manufacturing a material such as a seat pad having a warmer, and to reduce the time required, thereby reducing manufacturing cost and increasing price competitiveness.

(2) Manufacturing of a material such as a seat pad having a warmer can be prevented, and a comfortable working environment can be created.

(3) It is possible to improve the reliability of the product by increasing the heating efficiency of the heating line and the heat efficiency transmitting the generated heat to the outside.

1 is a process flow diagram of a method for manufacturing a warm-up integrated material according to a first embodiment of the present invention.
FIG. 2 is a process flow chart of a method for manufacturing a material with integrated wirers according to a second embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may obscure the subject matter of the present invention.

The same reference numerals are used for portions having similar functions and functions throughout the drawings.

In addition, in the entire specification, when a part is referred to as being 'connected' to another part, it may be referred to as 'indirectly connected' not only with 'directly connected' . Also, to include an element does not exclude other elements unless specifically stated otherwise, but may also include other elements.

As shown in FIG. 1, the method for manufacturing a warm-up integrated material according to the first embodiment of the present invention includes a warmer preparation step S11, a warmer placement step S12, a mixing step S13, a heating step S14, Step S15.

The warmer preparing step S11 is a step of preparing a warmer consisting of a base layer having a heating line for generating heat upon application of power, and the warmer can be applied in various forms depending on the heating wire and the base material layer having the heating wire.

That is, the above-mentioned warmer may be composed of a base material layer of a fibrous material such as an electric resistance metal wire such as a copper wire or a nickel wire which generates electric resistance heat when power is applied, and a nonwoven fabric fixed on one side thereof.

In addition, the warmer may include a nano-carbon film on which a heating line is pattern-printed so as to generate heat when power is applied, and a base material layer having a cloth on one side thereof.

The above-mentioned warmer may be composed of a base layer made of carbon nanofibers which generate electric resistance heat when a power is applied, and a non-conductive fibrous layer woven therewith.

In the step of arranging the warmer (S12), the warmer is disposed on the bottom surface of the first lower mold. The warmer disposed on the bottom surface of the first mold is exposed to the outer surface of the pad body .

In addition, it is preferable that a releasing agent is sprayed onto the inner surface of the lower first metal mold and the inner surface of the upper second metal mold facing the inner surface of the lower first metal mold so as to facilitate separation and release of the foam-molded pad main body .

In the merging step (S13), a predetermined amount of a polyurethane raw material for foaming is mixed with a thermoplastic additive in powder or fiber form to inject a foamed mixture liquid as a polyurethane foam composition into the inside of the first mold through a mixing nozzle to fill a predetermined amount, The first and second molds are vertically and horizontally assembled so as to form a pad body having a predetermined shape while the foam mixture mixture is foamed and expanded in volume.

Subsequently, in the heating step S14, the first and second molds, which are vertically and horizontally combined to transfer heat of a predetermined temperature to the pad body foamed and molded in the cavities of the first and second molds, are directly or indirectly .

Finally, in the demolding step (S15), the upper and lower molds are separated from each other. Then, the heaters are integrally attached to the outer surface of the foam body formed by the cavity formed between the first and second molds And separating the material such as the seat pad.

Here, the pad main body to which the warmer is applied may be an internal material constituting any one of a seat, a back sheet, a headrest, and a steering wheel used as an interior material in an automobile, but is not limited thereto and is common to pad- Lt; / RTI >

The base layer of the warmer selectively disposed in any one of the first and second molds may be formed of a fabric having loose structure such as mesh or the like so as to increase the permeability of the foam mixture to be foam- It is preferable to be made of ash.

As shown in FIG. 2, the method for manufacturing a warm-up integrated material according to the second embodiment of the present invention includes a step of preparing a warmer (S21), a primary mixing step (S22), a warmer placing step (S23) S24), a heating step S25, and a demolding step S26.

In the warmer preparation step S21, similarly to the first embodiment, a warmer made of a substrate layer having a heating line that generates heat when power is applied is prepared. Such a warmer can be prepared according to the heating line and the material of the base layer Various forms can be applied, and a detailed description thereof will be omitted.

The primary molding step (S22) injects the foam mixture into the lower first mold and vertically joins the first and second molds so that the sprayed foam mixture is foamed.

That is, in the same manner as in the first embodiment, a predetermined amount of a polyurethane raw material for foaming is mixed with a thermoplastic additive in powder or fiber form to inject a foamed mixture liquid as a polyurethane foam composition into the first mold through a mixing nozzle, The first and second molds are vertically and horizontally assembled so that the filled foamed mixture liquid is foamed and expanded to form a pad body having a predetermined shape.

At this time, it is preferable that the mold release agent is sprayed onto the inner surfaces of the first and second molds before spraying the foamed mixed solution, so that the separation operation can be easily performed when the pad body is demolded.

In the step of arranging the warmer (S23), one side of the semi-cured pad body is exposed to the outside by separating any one of the first mold and the second mold, And the warmer is placed on the surface.

Subsequently, in the secondary assembling step (S24), the first and second molds are vertically and secondarily assembled so that the heaters arranged on the outer surface of the pad body and the pad body are integrated with each other.

In this case, the heaters mounted on the outer surface of the semi-hardened pad body can be closely integrated with the outer surface of the pad body, which is hardened in the cavity of the first and second molds to be vertically combined.

The heating step (S25) and the demolding step (S26) are the same as the first embodiment except that the first and second molds are heated for a predetermined time And a material such as a seat pad integrally attached with a warmer is separated from the outer surface of the pad body formed by the foam molding in the cavities of the first and second molds.

On the other hand, the base material layer of the warmer is melted and dissolved in the pad body due to the reaction temperature generated in the process of foam molding in the cavities of the first and second molds, As the substrate layer melts away, only the heating line can be remained.

Accordingly, the substrate layer on which the heating line of the warmer is disposed and fixed is made of the same or similar material as the wet paper, vinyl, acrylic, or foamed material having a melting point sufficient to melt by the reaction temperature generated in the cavity during the foam molding of the foamed mixture liquid And may be made of a material such as sheet paper.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be apparent to those of ordinary skill in the art.

S11, S21: Warmer preparation step
S12, S23: Warmer placement step
S13:
Step S22:
S24: Secondary compounding step
S14, S25: heating step
S15, S26: De-molding step

Claims (3)

A warmer preparing step of preparing a warmer comprising a substrate layer having a heating wire on one side thereof for generating heat upon power application;
The first mold and the second mold are combined so that the foamed mixture liquid is injected into the cavity formed between the first mold and the second mold to fill the predetermined amount and the filled foamed mixture liquid is foamed and reacted to form the pad body, A primary consolidation step to produce;
Separating one of the first mold and the second mold to expose one side of the semi-cured pad body to the outside and dispose the warmer on the exposed surface of the semi-cured pad body;
A second molding step in which the first mold and the second mold are assembled so that the heaters and the pad body, which are placed on the outer surface of the semi-curing pad body, are integrated with each other;
A heating step of heating the first and second molds for a predetermined time to transfer heat of a predetermined temperature to the pad body through the first and second molds,
And a demolding step of separating and demolding a material pad integrally attached with a heating wire of a warmer on the outer surface of the pad body foam-molded in the cavities of the first and second molds,
The base layer of the warmer attached to the outer exposed surface of the semi-hardened pad body melts and disappears in the pad body due to the heat of a predetermined temperature transmitted through the first and second molds for a predetermined time, Remains on the exterior exposed surface of the body,
Wherein the substrate layer of the warmer is made of a fabric material having a melting point capable of permeating the foamed mixture liquid and capable of being melted by the reaction temperature occurring in the cavity during the foaming molding of the foamed mixture liquid . The method according to claim 1,
Wherein the pad body is an internal material constituting any one of a seat, a back sheet, a headrest, and a steering wheel. delete

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