The present invention relates to a natural fiber-exposed door trim integrally formed with a speaker grille and a manufacturing method thereof. According to the present invention, the method comprises: a first step of preparing a first fabric that is a felt made of natural fiber and polypropylene form a core; a second step of preparing a transparent second fabric disposed on the first fabric to form a skin; a third step of preheating the first fabric and the second fabric with a heater; a fourth step of inserting the first fabric and the second fabric into a press mold and compressing and cutting the same in the shape of a door trim to form a panel in which the core and the skin are integrally formed; and a fifth step of putting the panel in a first injection mold and injecting a first molten resin to form a frame around the rear surface of the core and form a speaker grille covering a speaker hole in the speaker hole formed in the panel. The upper mold of the first injection mold has a plurality of first regulating pins disposed around the speaker hole and the lower mold of the same has a plurality of second regulating pins corresponding to the first regulating pins and the first regulating pins and the second regulating pins fix the circumference of the speaker hole of the panel to prevent the first molten resin from overflowing when the speaker grille is formed. Accordingly, since the core including eco-friendly natural fibers is exposed through the skin, users can directly see patterns of natural fibers and feel the texture of natural fibers. Since pressing, molding, and trimming of the first and second fabrics are performed together with a press mold, processes and production costs are reduced. Moreover, since it is prevented that the second molten resin injected for molding the speaker grille overflows, a speaker grille of excellent quality can be formed.

    개시되는 스피커그릴이 일체로 형성되는 천연섬유 노출형 도어트림 및 그 제조방법은, 코어를 형성할 수 있도록 천연섬유 폴리프로필렌으로 이루어진 펠트인 제1원단을 준비하는 제1단계; 제1원단 위에 배치되어 스킨을 형성할 수 있도록 투명한 제2원단을 준비하는 제2단계; 제1원단과 제2원단을 히터로 예열하는 제3단계; 프레스 금형에 제1원단과 제2원단을 넣고 압축시키는 동시에 도어트림 형태로 절단하여 코어와 스킨이 일체로 성형된 패널을 형성하는 제4단계; 및 제1사출 금형에 패널을 넣고 제1용융수지를 사출하여 코어의 후면 둘레에 프레임을 형성하고, 패널에 형성된 스피커홀에 스피커홀을 덮는 스피커그릴을 형성하는 제5단계를 포함하되, 제1사출 금형은 상형에 복수의 제1규제핀이 스피커홀 둘레에 배치되도록 형성되고 하형에 제1규제핀에 대응하는 복수의 제2규제핀이 형성되고, 제1규제핀과 제2규제핀은 패널의 스피커홀 둘레를 고정하여 스피커그릴을 형성할 때 제1용융수지가 넘치는 것을 방지할 수 있다. 본 발명에 의하면, 친환경 천연섬유를 포함하는 코어가 스킨을 통하여 노출되어 사용자가 천연섬유의 무늬를 직접 볼 수 있고 천연섬유의 질감을 느낄 수 있으며, 프레스 금형으로 제1원단과 제2원단의 압축, 성형 및 트리밍 과정을 함께 진행하여 공정을 단축하고 생산비용을 절감할 수 있고, 스피커그릴을 성형하기 위해 사출된 제2용융수지가 오버플로우 되는 것을 방지하여 우수한 품질의 스피커그릴을 형성할 수 있다.


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    Title :

    Natural fiber-exposed door trim with speaker grille integrally formed and its manufacturing method


    Additional title:

    스피커그릴이 일체로 형성되는 천연섬유 노출형 도어트림 및 그 제조방법


    Contributors:
    JEONG HUN SUB (author) / LEE JAE YONG (author) / KIM SUENG HO (author) / KWAK SUNG BOK (author)

    Publication date :

    2021-01-19


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    B29C Formen oder Verbinden von Kunststoffen , SHAPING OR JOINING OF PLASTICS / B60J WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES , Fenster, Windschutzscheiben und bewegbare Dächer, Türen oder Ähnliches für Fahrzeuge / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR



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