KR20140082226A - Side insulator and manufacturing method thereof - Google Patents

Side insulator and manufacturing method thereof Download PDF

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Publication number
KR20140082226A
KR20140082226A KR1020120151850A KR20120151850A KR20140082226A KR 20140082226 A KR20140082226 A KR 20140082226A KR 1020120151850 A KR1020120151850 A KR 1020120151850A KR 20120151850 A KR20120151850 A KR 20120151850A KR 20140082226 A KR20140082226 A KR 20140082226A
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South Korea
Prior art keywords
sound absorbing
absorbing material
nonwoven fabric
rigid
flame retardant
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KR1020120151850A
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Korean (ko)
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KR101421951B1 (en
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안재우
김용표
이성일
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현대자동차주식회사
삼우기업 주식회사
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Priority to KR1020120151850A priority Critical patent/KR101421951B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K37/00—Dashboards
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/162—Selection of materials
    • G10K11/168—Plural layers of different materials, e.g. sandwiches

Abstract

The present invention provides a side insulator comprising: a flame retardant non-woven fabric; a sound absorbing material which is attached to the flame retardant non-woven fabric on one side; and a rigid stiffening member which is attached on the other side of the sound absorbing material on one side and is made of a more rigid material than the sound absorbing material. Additionally, provided is a manufacturing method for the side insulator which comprises: a first thermoforming step of applying heat within the range of 190 to 230°C after laminating the rigid stiffening material made of a polypropylene material containing kenaf, the sound absorbing material made of a polyurethane-mixed material, and the flame retardant non-woven fabric; a second thermoforming step of applying heat within the range of 190 to 230°C and pressing the rigid stiffening material, the sound absorbing material, and the flame retardant non-woven fabric; and a cold forming step of pressing the rigid stiffening material, the sound absorbing material, and the flame retardant non-woven fabric within the range of 0 to 20°C.

Description

사이드인슐레이터 및 그 제조방법{Side insulator and manufacturing method thereof}Side insulator and manufacturing method thereof < RTI ID = 0.0 >

본 발명은 사이드인슐레이터 및 그 제조방법에 관한 것으로서 더욱 상세하게는 운전석이 마련되는 상용차의 캡(cab)의 하부에 장착되거나 엔진룸 내부에 장착되어 엔진 및/또는 동력계통 부품에서 발생되는 소음과 열이 운전석 및 외부로 전달되지 않도록 차단하는 판 형상의 사이드인슐레이터 및 그 제조방법에 관한 것이다.
The present invention relates to a side insulator and a method of manufacturing the same. More particularly, the present invention relates to a side insulator and a method of manufacturing the same. More particularly, the present invention relates to a side insulator and a method of manufacturing the same. To the outside of the driver's seat and to the outside, and a method of manufacturing the side insulator.

운전석이 마련된 캡 하부에 엔진 및 동력계통 장치들 중 전부 또는 일부가 배치되는 캡 오버(cab over) 타입의 차량들은 전면에 보닛이 돌출되지 않는 구조로서 상대적으로 운전석과 엔진이 가깝게 배치된다.BACKGROUND OF THE INVENTION [0002] Cab-over vehicles in which all or a part of an engine and a power system apparatus are disposed under a cab provided with an operator seat are structured such that a bonnet does not protrude from the front, and the driver's seat and the engine are arranged relatively close to each other.

이에 따라서, 캡 오버 타입의 차량들은 엔진에서 발생하는 열과 소음이 운전석으로 침투하지 못하도록 다양한 판 모양으로 제조되는 사이드인슐레이터들이 캡의 하부 및/또는 엔진룸을 형성하는 프레임에 추가적으로 장착된다.Accordingly, the cab-over type vehicles are additionally mounted to the frame forming the lower part of the cab and / or the engine room, in which side insulators made in various plate shapes are prevented from penetrating the driver's seat with heat and noise generated in the engine.

종래의 사이드인슐레이터는 도 1a 에 도시된 바와 같이 강성을 유지하도록 플라스틱 사출물로 제조되는 커버(2)에 흡음재(1)가 부착되어 제조된다. 상기 흡음재(1)는 도 1b 에 도시된 바와 같이 두 장의 글라스울(glass wool)(4)의 일측면과 타측면에 난연부직포(3)와 부직포(5)가 각각 부착되되, 열이 발산되는 측에 난연부직포(3)가 놓이고 부직포(5)는 커버(2)에 밀착되도록 구성된다.
A conventional side insulator is manufactured by attaching a sound absorbing material 1 to a cover 2 made of a plastic injection molded article so as to maintain rigidity as shown in Fig. 1A. As shown in FIG. 1B, the sound-absorbing material 1 is attached to one side and the other side of two glass wools 4 with a flame-retardant nonwoven fabric 3 and a nonwoven fabric 5, Nonwoven fabric 3 is placed on the side of the cover 2 and the nonwoven fabric 5 is brought into close contact with the cover 2.

한편, 종래의 구조에서는 도 1c 에 도시된 바와 같이 흡음재(1)의 끝단부에서 글라스울(4)이 외부로 노출됨에 따라 상기 글라스울(4)이 가루형태로 날려져 내구성 및 미관상 문제점이 있었다. 그리고, 커버(2)와 흡읍재(1)를 부착시키기 위한 조립공정이 추가되어야 했으며, 조립 시 갭단차의 품질확보가 용이하지 못하였다.Meanwhile, in the conventional structure, as shown in FIG. 1C, the glass wool 4 is exposed to the outside at the end portion of the sound-absorbing material 1, and the glass wool 4 is blown into a powder form, . Further, an assembling process for attaching the cover 2 and the suction member 1 has been added, and it has not been easy to secure the quality of the gap step at the time of assembling.

따라서, 본 발명은 상기와 같은 문제점을 해소할 수 있도록 흡음재로서 폴리에틸렌테레프탈레이트와 폴리우레탄이 혼합된 재질을 사용하되, 커버를 대신하여 상기 흡음재에 일체로 압착되어 강성을 보강하는 강성보강재를 포함하여 구성된 사이드인슐레이터 및 그 제조방법을 제공하는 것에 주목적이 있다.
Accordingly, in order to solve the above problems, the present invention includes a rigid reinforcing material which is made of a mixture of polyethylene terephthalate and polyurethane as a sound absorbing material, and which is integrally pressed on the sound absorbing material in place of the cover to reinforce the rigidity And to provide a method of manufacturing the side insulator.

상기와 같은 목적을 달성하기 위한 사이드인슐레이터는, 캡(cab) 하부 또는 엔진룸 내에서 방음용으로 장착되는 판 형상의 사이드인슐레이터에 있어서, 난연성(難練性)을 갖는 난연부직포;와 일측면이 상기 난연부직포에 부착되는 흡음재; 및 일측면이 상기 흡음재의 타측면에 부착되되, 상기 흡음재 보다 더 큰 강성을 갖는 재질로 제조된 강성보강재;를 포함하여 구성된다. 그리고, 상기 강성보강재의 타측면에는 부직포가 부착되어, 상기 난연부직포, 흡음재, 강성보강재 및 부직포는 층을 이루도록 결합된다.In order to achieve the above object, a side insulator according to the present invention comprises a flame retardant non-woven fabric having flame retardancy, A sound absorbing material attached to the flame retardant nonwoven fabric; And a rigid stiffener having one side attached to the other side of the sound absorbing material and made of a material having a greater rigidity than the sound absorbing material. The non-woven fabric is attached to the other side of the rigid stiffener, and the flame retardant nonwoven fabric, the sound absorbing material, the rigid stiffener, and the nonwoven fabric are layered.

본 발명의 바람직한 실시예에 따른 흡음재는 폴리우레탄(polyurethane) 재질, 바람직하게는 폴리에틸렌테레프탈레이트(polyethylene terephthalate)와 폴리우레탄이 혼합된 재질로 제조되고, 상기 강성보강재는 케나프(kenaf)를 함유한 폴리프로필렌(polypropylene) 재질로 제조된다.A sound absorbing material according to a preferred embodiment of the present invention is made of a material made of polyurethane, preferably a mixture of polyethylene terephthalate and polyurethane, and the rigid reinforcement is made of a material containing kenaf It is made of polypropylene material.

그리고, 본 발명의 사이드인슐레이터를 제조하기 위한 방법은, 케나프를 함유한 폴리프로필렌 재질로 제조된 강성보강재와 폴리우레탄 재질(바람직하게는 폴리에틸렌테레프탈레이트와 폴리우레탄이 혼합된 재질)로 제조된 흡음재 및 난연성을 갖는 난연부직포를 적층시킨 후, 190℃ 내지 230℃ 범위로(바람직하게는 폴리에틸렌테레프탈레이트와 폴리우레탄의 연성(ductility, 延性)이 증대되는 200℃ 근방으로) 열을 가하는 제1차열성형단계;와 190℃ 내지 230℃ 범위로(바람직하게는 폴리에틸렌테레프탈레이트와 폴리우레탄의 연성이 증대되는 200℃ 근방으로) 열을 가함과 동시에 상기 강성보강재와 흡음재 및 난연부직포를 가압하는 제2차열성형단계; 및 0℃ 내지 20℃ 범위의 온도에서 상기 강성보강재와 흡음재 및 난연부직포를 가압하는 냉간성형단계;를 포함하여 구성된다.The method for manufacturing the side insulator of the present invention is a method for manufacturing a side insulator comprising a rigid reinforcing material made of polypropylene containing kenaf and a sound absorbing material made of polyurethane (preferably a mixture of polyethylene terephthalate and polyurethane) And a flame-retardant nonwoven fabric laminated thereon, and then heat is applied to the first heat-shrinkable molded product, which is heated at a temperature in the range of 190 ° C to 230 ° C (preferably in the vicinity of 200 ° C where ductility of poly (ethylene terephthalate) And a second heat-shrinkable molding process for applying heat to the rigid reinforcing material, the sound-absorbing material and the flame-retardant nonwoven fabric at a temperature in the range of 190 ° C to 230 ° C (preferably, in the vicinity of 200 ° C where the ductility of polyethylene terephthalate and polyurethane increases) step; And a cold forming step of pressing the rigid reinforcing material, the sound absorbing material and the flame-retardant nonwoven fabric at a temperature in the range of 0 ° C to 20 ° C.

한편, 본 발명의 제2차열성형단계에서는 70kgf/㎠ 내지 110kgf/㎠ 범위의 압력이 가해지고, 상기 냉간성형단계에서는 40kgf/㎠ 내지 60kgf/㎠ 범위의 압력이 가해진다. 그리고, 상기 냉간성형단계에서는 압력에 의해 성형된 제품이 분리되는 트리밍(trimming)이 동시에 실시된다.On the other hand, in the second heat-shrinking step of the present invention, a pressure ranging from 70 kgf / cm 2 to 110 kgf / cm 2 is applied, and a pressure ranging from 40 kgf / cm 2 to 60 kgf / cm 2 is applied in the cold forming step. In the cold forming step, trimming is performed simultaneously in which the product molded by the pressure is separated.

아울러, 상기 강성보강재를 170℃ 내지 230℃ 온도에서 60kgf/㎠ 내지 100kgf/㎠ 범위의 압력로 압착시키는 예비압착단계가 제1차성형단계 이전에 이루지되, 상기 예비압착단계는 강성보강재의 일측면에 부직포가 접착된다.
Also, a preliminary pressing step of pressing the rigid stiffener at a temperature ranging from 170 ° C. to 230 ° C. at a pressure ranging from 60 kgf / cm 2 to 100 kgf / cm 2 is performed before the first molding step, The nonwoven fabric is adhered to the nonwoven fabric.

상기와 같이 구성된 본 발명은, 커버와 흡음재가 분리되어 제조된 종래의 구조를 대신하여 흡음재와 강성보강재가 일체로 압착되어 제조됨으로 생산원가를 절감할 수 있으며, 갭단차 발생과 같이 종래에 조립과정에서 발생되던 품질문제를 해소할 수 있다.According to the present invention constructed as described above, instead of the conventional structure in which the cover and the sound absorbing material are separately manufactured, the sound absorbing material and the rigid stiffening material are integrally manufactured by squeezing, so that the production cost can be reduced. Can solve the problem of quality that has occurred in the environment.

그리고, 글라스울이 가루형태로 비산되는 문제점을 방지할 수 있으며, 더 얇은 판 형태로 제조될 수 있으므로 미관을 개선할 수 있는 효과가 있다.In addition, it is possible to prevent the glass wool from scattering in the form of powder, and it can be manufactured in a thinner plate shape, thereby improving the appearance.

본 발명의 제조방법은 열가소성을 갖는 폴리우레탄을 (제1차성형단계에서) 예열한 후, (제2차성형단계에서) 열성형을 진행하고 (냉간성형단계에서) 냉각과 동시에 성형을 함으로써 보다 정확한 치수의 제품을 성형할 수 있으며 층 사이의 벌어짐을 개선할 수 있다.The manufacturing method of the present invention is characterized in that the thermoplastic polyurethane is preheated (in the first molding step), followed by thermoforming (in the second molding step) and molding It is possible to form products of exact dimensions and to improve the spreading between the layers.

아울러, 냉간성형단계에서 (제품 취출을 위한) 트리밍이 동시에 수행되므로 제조공정을 단축시킬 수 있다. 또한, 강성보강재는 (원래의 두께 대비 1/3 이하로) 압착이 이뤄진 상태에서 상태에서 성형이 이뤄지므로 제품의 두께를 더욱 줄일 수 있는 효과가 있다.
In addition, since trimming (for product take-out) is performed simultaneously in the cold forming step, the manufacturing process can be shortened. In addition, since the rigid stiffener is formed in a state in which the compression is performed (less than 1/3 of the original thickness), the thickness of the product can be further reduced.

도 1a 는 커버와 흡음재가 결합되어 종래의 사이드인슐레이터를 구성한 모습을 나타내는 이미지,
도 1b 는 종래의 구조에서 흡음재의 적층구조를 구성하는 부재들을 도시한 도면,
도 1c 는 종래의 흡음재 측면 모습을 촬영한 사진,
도 2 는 본 발명의 바람직한 실시예에 따라 제조된 사이드인슐레이터를 촬영한 사진 및 상기 사이드인슐레이터의 적층구조를 구성하는 부재들을 도시한 도면,
도 3 은 종래의 사이드인슐레이터와 본 발명의 사이드인슐레이터의 단면모습을 비교한 도면,
도 4 는 본 발명에 따라 사이드인슐레이터를 제조하는 공정단계를 나타내는 도면.1A is an image showing a state in which a cover and a sound absorbing material are combined to constitute a conventional side insulator,
1B is a view showing members constituting a laminated structure of a sound absorbing material in a conventional structure,
1C is a photograph of a side view of a conventional sound absorbing material,
FIG. 2 is a photograph of a side insulator manufactured in accordance with a preferred embodiment of the present invention and the members constituting the laminated structure of the side insulator. FIG.
3 is a cross-sectional view of a conventional side insulator and a side insulator of the present invention,
4 shows a process step of manufacturing a side insulator in accordance with the present invention.

이하, 도면을 참조하여 본 발명의 바람직한 실시예에 따른 사이드인슐레이터 및 그 제조방법을 더욱 상세하게 설명한다.Hereinafter, a side insulator according to a preferred embodiment of the present invention and a method of manufacturing the same will be described in detail with reference to the drawings.

본 발명의 사이드인슐레이터는 운전석이 마련되는 캡(cab)의 하부 또는 엔진룸 내에 장착되도록 다양한 판 형상을 갖되, 다수 개의 부재들이 적층되는 구조를 갖는다. 즉, 도 2 에 도시된 바와 같이, 난연부직포(10), 흡음재(20), 강성보강재(30) 및 부직포(40)로 구성된 각 부재가 층을 이루도록 결합된다.The side insulator of the present invention has a variety of plate shapes to be mounted in a lower portion of a cab or an engine room where a driver's seat is provided, and has a structure in which a plurality of members are stacked. That is, as shown in FIG. 2, each member composed of the flame retardant nonwoven fabric 10, the sound absorbing material 20, the rigid stiffener 30, and the nonwoven fabric 40 is layered.

상기 난연부직포(10)는 엔진에서 발산된 열에 의하여 변형되지 않으며 흡음재(20)를 보호할 수 있도록 난연성(難練性)을 갖는 물질에 부직포가 함침되거나 표면에 도포됨으로서 제조된다. 상기 흡음재(20)는 일측면이 난연부직포(20)에 접착되되, 본 발명의 바람직한 실시예에서는 열가소성재인 폴리우레탄(polyurethane) 재질, 바람직하게는 폴리에틸렌테레프탈레이트(polyethylene terephthalate)와 폴리우레탄이 혼합된 재질로 제조된다. The flame retardant nonwoven fabric 10 is fabricated by impregnating or impregnating a nonwoven fabric with a flame retardant material so as not to be deformed by the heat emitted from the engine and to protect the sound absorber 20. In the preferred embodiment of the present invention, the sound absorbing material 20 is bonded to the flame-retardant nonwoven fabric 20 at one side, and a polyurethane material, preferably a mixture of polyethylene terephthalate and polyurethane, .

그리고, 상기 흡음재(20)의 타측면에 접착되는 강성보강재(30)는 흡음재(20) 보다 더 큰 강성을 갖는 폴리프로필렌(polypropylene) 재질로 제조되되 강성을 추가적으로 보강하기 위하여 케나프(kenaf) 성분을 함유한다. 그리고, 강성보강재(30)에는 상기 강성보강재(30)가 외부에 노출되는 것을 방지하고 내구성을 확보할 수 있도록 소정의 두께를 갖는 부직포(40)가 부착된다. 본 발명의 바람직한 실시예 따른 사이드인슐레이터는 난연부직포(10), 흡음재(20), 강성보강재(30) 및 부직포(40)의 밀도들이 1: 14 ~ 18: 22 ~ 26:1 비율을 갖도록 제조된다. 가령, 난연부직포(10)와 부직포(40) 각각이 100g/㎡ 의 밀도를 가지면 흡음재(20)는 1400 ~ 1800g/㎡, 강성보강재(30)는 2200 ~ 2600g/㎡ 의 밀도를 갖도록 제조된다.The rigid stiffener 30 adhered to the other side of the sound absorbing material 20 is made of polypropylene having a stiffness greater than that of the sound absorbing material 20 and has a kenaf component Lt; / RTI > A nonwoven fabric 40 having a predetermined thickness is attached to the rigid stiffener 30 to prevent the rigid stiffener 30 from being exposed to the outside and ensure durability. The side insulator according to the preferred embodiment of the present invention is manufactured so that the densities of the flame retardant nonwoven fabric 10, the sound absorbing material 20, the rigid stiffener 30 and the nonwoven fabric 40 have a ratio of 1:14 to 18:22 to 26: 1 . If the flame retardant nonwoven fabric 10 and the nonwoven fabric 40 each have a density of 100 g / m 2, the sound absorbing material 20 is manufactured to have a density of 1400 to 1800 g / m 2 and the rigid stiffener 30 has a density of 2200 to 2600 g / m 2.

상기와 같이 구성된 본 발명의 사이드인슐레이터는 각 부재들(10, 20, 30, 40)이 일체로 결합됨에 따라서 도 3 에 도시된 바와 같이 종래의 구조와 대비하여 커버(2)의 추가적인 장착이 생략되어도 강성을 확보할 수 있으며 요구되는 성능에 따라서 두께를 더 용이하게 조절할 수도 있다.The side insulator according to the present invention having the above-described structure is configured such that the additional mounting of the cover 2 is omitted in comparison with the conventional structure as shown in FIG. 3 as the members 10, 20, 30, The rigidity can be ensured and the thickness can be more easily adjusted according to the required performance.

한편, 본 발명의 사이드인슐레이터 제조방법은 도 4 에 도시된 바와 같이, 예비압착단계, 제1차열성형단계, 제2차열성형단계 및 냉간성형단계들을 포함하여 구성된다.Meanwhile, as shown in FIG. 4, the side insulator manufacturing method of the present invention includes a preliminary pressing step, a first heat-for-molding step, a second heat-for-molding step, and a cold-forming step.

상기 예비압착단계에서는 부직포(40)와 함께 강성보강재(30)를 170℃ 내지 230℃ 온도에서 60kgf/㎠ 내지 100kgf/㎠ 범위의 압력로 압착시킨다. 이때, 200톤급의 평판프레스가 사용되며, 상기 강성보강재(30)는 열가소성 수지인 폴리프로필렌으로 제조되되 (냉각 후 적정온도 구간에서) 강성이 향상되도록 케나프가 일정 성분비로 함유된 폴리프로필렌으로 제조된다. 예비압착단계에서 상기 강성보강재(30)는 원래 두께의 4분의1 내지 6분의1 두께로 얇게 압착이 이뤄진다(가령 20mm 두께에서 4mm 두께로). In the preliminary squeezing step, the rigid stiffener 30 is pressed together with the nonwoven fabric 40 at a temperature ranging from 170 ° C to 230 ° C at a pressure ranging from 60 kgf / cm 2 to 100 kgf / cm 2. In this case, a 200-ton level flat press is used. The rigid stiffener 30 is made of polypropylene, which is a thermoplastic resin, and the kenaf is made of polypropylene having a certain component ratio so that rigidity is improved (at an appropriate temperature range after cooling) do. In the preliminary squeezing step, the rigid stiffener 30 is squeezed to a thickness of 1/4 to 1/6 of its original thickness (for example, from 20 mm to 4 mm thick).

부직포(40)와 함께 압착된 강성보강재(30)는, 난연성 물질로 제조되거나 난연성 물질이 도포된 난연부직포(10), 폴리에틸렌테레프탈레이트와 폴리우레탄이 혼합된 재질로 제조된 흡음재(20), 강성보강재(30), 부직포(40) 순서대로(도 3 에 도시된 순서대로) 층을 이루도록 겹쳐진 상태로 핫프레스(hot press)로 (더 상세하게는 핫프레스에 장착된 금형 내부로) 이동된다. 그리고, 상기 핫프레스 또한 200톤급의 용량을 가지며 제1차열성형단계와 제2차열성형단계가 실시된다. The rigid stiffener 30 pressed together with the nonwoven fabric 40 is made of a flame retardant nonwoven fabric 10 made of a flame retardant substance or coated with a flame retardant substance, a sound absorbing material 20 made of a material in which polyethylene terephthalate and polyurethane are mixed, (More specifically, into the mold mounted on the hot press) in a state in which the reinforcement 30 and the nonwoven fabric 40 are layered in this order (in the order shown in Fig. 3). The hot press also has a capacity of 200 tons, and the first and second heat forming steps are performed.

상기 제1차열성형단계에서는 열가소성 재질들에 연성(ductility)을 부여하여 성형이 용이하게 이뤄질 수 있도록 190℃ 내지 230℃ 범위로(더 상세하게는 200℃ 내지 205℃ 근방으로) 열을 가하되 (하중을 제외한) 별도의 압력을 가하지 않는다.In the first heat-shrinking step, heat is applied to the thermoplastic material at a temperature ranging from 190 ° C to 230 ° C (more specifically, from 200 ° C to 205 ° C) so that ductility can be imparted to the thermoplastic materials to facilitate molding Do not apply extra pressure (except load).

그리고, 제2차열성형단계에서는 상기 부재들(즉, 난연부직포, 흡음재, 강성보강재, 부직포) 각각이 동시에 성형이 이뤄지도록 190℃ 내지 230℃ 범위로(더 상세하게는 200℃ 내지 205℃ 근방으로) 열을 가함과 동시에 적층구조의 벌어짐 현상을 방지하기 위해 70f/㎠ 내지 110kgf/㎠ 압력범위 내에서(더 상세하게는 90kgf/㎠ 근방의 압력에서) 금형들이 상기 부재들을 가압한다. 이에 따라, 각 부재들은 요구되는 형상으로(금형에 내부에 형성된 패턴 형상으로) 성형된다. In the second heat-shrinking step, the temperature of the members (that is, the non-woven fabric, the sound-absorbing material, the rigid stiffener, and the nonwoven fabric) ) Molds press the members within a pressure range of 70f / cm2 to 110kgf / cm2 (more specifically, at a pressure of about 90kgf / cm2) in order to prevent the lamination structure from widening. Accordingly, the respective members are molded in a desired shape (in the form of a pattern formed in the mold).

제2차열성형단계 이후, 적층된 각 부재들은 (200톤급의) 콜드프레스(cold press)로 이송된다. 상기 콜드프레스는, 연성이 부여된 부재들 즉, 흡음재(20) 및 강성보강재(30)가 냉각될 때 변형이 발생하는 것을 방지하기 위하여 0℃ 내지 20℃ 범위의 온도에서(더 상세하게는 8℃ 근방의 온도에서) 부재들(난연부직포, 흡음재, 강성보강재, 부직포)을 동시에 냉각하며 압착시킨다. 상기 냉간성형단계에서의 압착압력은 40kgf/㎠ 내지 60kgf/㎠ 범위 내에서(더 상세하게는 50kgf/㎠ 근방으로) 이뤄지되, 상기 냉간성형단계에서는 압력에 의해 성형된 제품이 분리되는 트리밍(trimming)이 동시에 실시된다.After the second thermal forming step, the laminated members are transported to a cold press (200 ton). The cold press is preferably carried out at a temperature in the range of 0 ° C to 20 ° C (more specifically, 8 ° C to 20 ° C) to prevent deformation from occurring when the ducted members, that is, the sound absorbing member 20 and the rigid stiffener 30 are cooled (Non-woven fabric, sound absorbing material, rigid stiffener, non-woven fabric) are simultaneously cooled and squeezed. The pressing pressure in the cold forming step is in the range of 40 kgf / cm 2 to 60 kgf / cm 2 (more specifically, in the vicinity of 50 kgf / cm 2), and in the cold forming step, ) Are simultaneously performed.

상기와 같이 구성된 본 발명의 사이드인슐레이터 및 그 제조방법은 종래의 구조 및 그 제조방법과 대비하여 일체성형이 이뤄질 수 있으므로 생산원가를 절감할 수 있으며 글라스울이 노출되어 비산되던 종래의 문제점을 해소할 수 있는 효과가 있다.Since the side insulator of the present invention and the method of manufacturing the same of the present invention can be integrally molded in comparison with the conventional structure and the manufacturing method thereof, it is possible to reduce the production cost and solve the conventional problem of scattering the glass wool There is an effect that can be.

이상과 같이 본 명세서와 도면에 개시된 실시예들은 본 발명의 이해를 돕기 위해 특정 예를 제시한 것에 지나지 않으며, 본 발명의 범위를 제한하고자 하는 것은 아니다. 여기에 개시된 실시예들 이외에도 본 발명의 기술적 사상에 바탕을 둔 다른 변형예들이 실시 가능하다는 것은 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 자명한 것이다.
As described above, the embodiments disclosed in the present specification and drawings are only illustrative of specific examples in order to facilitate understanding of the present invention, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

10 : 난연부직포
20 : 흡음재
30 : 강성보강재
40 : 부직포10: Non-woven fabric
20: Sound absorbing material
30: Rigid stiffener
40: Nonwoven fabric

Claims (8)

사이드인슐레이터에 있어서,
난연성(難練性)을 갖는 난연부직포;와
일측면이 상기 난연부직포에 부착되는 흡음재; 및
일측면이 상기 흡음재의 타측면에 부착되되, 상기 흡음재 보다 더 큰 강성을 갖는 재질로 제조된 강성보강재;를 포함하여 구성된 것을 특징으로 하는 사이드인슐레이터.
In the side insulator,
A flame retardant nonwoven fabric having flame retardancy;
A sound absorbing material having one side attached to the flame retardant nonwoven fabric; And
And a rigid stiffener having one side attached to the other side of the sound absorbing material and made of a material having greater rigidity than the sound absorbing material.
제 1 항에 있어서, 상기 강성보강재의 타측면에는 부직포가 부착되어, 상기 난연부직포, 흡음재, 강성보강재 및 부직포는 층을 이루도록 결합된 것을 특징으로 하는 사이드인슐레이터.
The side insulator of claim 1, wherein a nonwoven fabric is attached to the other side of the rigid stiffener, and the flame retardant nonwoven fabric, the sound absorbing material, the rigid stiffener, and the nonwoven fabric are layered.
제 1 항 또는 제 2 항에 있어서, 상기 흡음재는 폴리우레탄(polyurethane)이 혼합된 재질로 제조되고, 상기 강성보강재는 케나프(kenaf)를 함유한 폴리프로필렌(polypropylene) 재질로 제조된 것을 특징으로 하는 사이드인슐레이터.
The sound absorbing material according to claim 1 or 2, wherein the sound absorbing material is made of a material mixed with polyurethane, and the rigid reinforcing material is made of a polypropylene material containing kenaf Side insulator.
케나프를 함유한 폴리프로필렌 재질로 제조된 강성보강재와, 폴리우레탄이 혼합된 재질로 제조된 흡음재, 및 난연성을 갖는 난연부직포를 적층시킨 후, 190℃ 내지 230℃ 범위로 열을 가하는 제1차열성형단계;와
190℃ 내지 230℃ 범위로 열을 가함과 동시에 상기 강성보강재와 흡음재 및 난연부직포를 가압하는 제2차열성형단계; 및
0℃ 내지 20℃ 범위의 온도에서 상기 강성보강재와 흡음재 및 난연부직포를 가압하는 냉간성형단계;를 포함하는 사이드인슐레이터의 제조방법.
A laminate of a rigid reinforcing material made of a polypropylene material containing kenaf, a sound absorbing material made of a material mixed with polyurethane, and a flame retardant nonwoven fabric is laminated, and then a first heat Molding step;
A second heat-shrinking step of applying heat to the range of 190 to 230 ° C while pressing the rigid reinforcing material, the sound-absorbing material and the flame-retardant nonwoven fabric; And
And a cold forming step of pressing the rigid reinforcing material, the sound absorbing material and the flame-retardant nonwoven fabric at a temperature in a range of 0 ° C to 20 ° C.
제 4 항에 있어서, 상기 제2차열성형단계에서는 70kgf/㎠ 내지 110kgf/㎠ 범위의 압력이 가해지고, 상기 냉간성형단계에서는 40kgf/㎠ 내지 60kgf/㎠ 범위의 압력이 가해지는 것을 특징으로 하는 사이드인슐레이터의 제조방법.
5. The method according to claim 4, wherein a pressure in the range of 70kgf / cm2 to 110kgf / cm2 is applied in the second step of forming the second heat, and a pressure in the range of 40kgf / A method for manufacturing an insulator.
제 5 항에 있어서, 상기 냉간성형단계에서는 압력에 의해 성형된 제품이 분리되는 트리밍(trimming)이 동시에 실시되는 것을 특징으로 하는 사이드인슐레이터의 제조방법.
6. The method as claimed in claim 5, wherein the cold forming step is performed simultaneously with trimming in which a product molded by pressure is separated.
제 4 항 내지 제 6 항 중 어느 한 항에 있어서, 상기 강성보강재를 170℃ 내지 230℃ 온도에서 60kgf/㎠ 내지 100kgf/㎠ 범위의 압력로 압착시키는 예비압착단계가 제1차성형단계 이전에 이루어지는 것을 특징으로 하는 사이드인슐레이터의 제조방법.
The method according to any one of claims 4 to 6, wherein the preliminary pressing step of pressing the rigid stiffener at a temperature ranging from 170 캜 to 230 캜 at a pressure ranging from 60 kgf / cm 2 to 100 kgf / cm 2 is performed before the first molding step Wherein the side insulator is made of a thermoplastic resin.
제 7 항에 있어서, 상기 예비압착단계는 강성보강재의 일측면에 부직포가 접착된 것을 특징으로 하는 사이드인슐레이터의 제조방법.[8] The method as claimed in claim 7, wherein the pre-compression step is performed by attaching a nonwoven fabric to one side of the rigid stiffener.
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JP4722436B2 (en) * 2004-09-02 2011-07-13 株式会社イノアックコーポレーション Sound absorbing material and manufacturing method thereof
KR101081636B1 (en) * 2009-02-17 2011-11-09 한일이화주식회사 An interior panel of automobile

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US20200202830A1 (en) * 2018-12-24 2020-06-25 Airbus Operations Sas Method for manufacturing a sound absorption structure comprising a cellular panel incorporating acoustic elements and sound absorption structure obtained using said method
US11676567B2 (en) * 2018-12-24 2023-06-13 Airbus Operations Sas Method for manufacturing a sound absorption structure comprising a cellular panel incorporating acoustic elements and sound absorption structure obtained using said method
KR102431487B1 (en) * 2021-10-14 2022-08-11 주식회사 서연이화 Manufacturing method of lightweight and flame retardant sound-absorbing materials

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