KR20210063978A - Foam injection mold using sheet back - Google Patents

Foam injection mold using sheet back Download PDF

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Publication number
KR20210063978A
KR20210063978A KR1020190152739A KR20190152739A KR20210063978A KR 20210063978 A KR20210063978 A KR 20210063978A KR 1020190152739 A KR1020190152739 A KR 1020190152739A KR 20190152739 A KR20190152739 A KR 20190152739A KR 20210063978 A KR20210063978 A KR 20210063978A
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South Korea
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mold
core
injection
synthetic resin
seatback
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KR1020190152739A
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Korean (ko)
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김종화
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남도금형(주)
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Publication of KR20210063978A publication Critical patent/KR20210063978A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/2602—Mould construction elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

A seat back injection mold according to the present invention includes: a movable mold part provided with a first core mold having a first core formed therein, and a top plate located outside the first core mold and movable together with the first core mold; and a fixing mold part in which a second core facing the first core is formed so as to be coupled with the movable mold part to form a cavity for molding a product, and a fixing part for fixing a synthetic resin insert member is provided. Since the injection mold using the seat back according to the present invention can be injection molded using an insert mold made of a synthetic resin, it is possible to manufacture the injection molded article having a core made of a synthetic resin material.

Description

시트백 사출금형{Foam injection mold using sheet back}Sheet back injection mold {Foam injection mold using sheet back}

본 발명은 시트백 사출 금형에 관한 것으로서, 더욱 상세하게는 시트백을 이를 합성수지재 인서트코어를 인서트 몰딩 할 수 있는 사출 금형에 관한 것이다.The present invention relates to a seatback injection mold, and more particularly, to an injection mold capable of insert molding a seatback and a synthetic resin insert core.

수지 발포체는 소재나 형성된 기포의 상태 등을 변화시킴으로써, 차열성, 단열성, 차음성, 흡음성, 방진성, 경량화 등의 모든 성능을 발현시킬 수 있기 때문에 여러가지 용도로 이용되고 있다. 이와 같은 수지 발포체로서는 예를 들어, 화학발포제를 발포시킴으로써 얻어지는 발포 폴리우레탄, 발포 폴리 프로필렌, 발포 폴리에틸렌, 발포 폴리염화비닐 등의 발포 수지의 포면에 폴리염화비닐이나 올레핀계 열사소성 엘라스토머 등으로 이루어지는 수지 시트나, 이와 같은 수지 시트에 패브릭 등을 표피재로 하여 부착한 복합 성형체로 이루어지는 쿠션재 등이 이용되고 있다. The resin foam is used for various purposes because it is possible to express all the performances such as heat shielding properties, heat insulation properties, sound insulation properties, sound absorption properties, dustproof properties, and weight reduction by changing the material or the state of the formed cells. As such a resin foam, for example, a resin composed of polyvinyl chloride or an olefin-based thermally plasticized elastomer on the surface of a foamed resin such as polyurethane foam, expanded polypropylene, expanded polyethylene, expanded polyvinyl chloride, etc. Cushioning materials made of a composite molded body attached to a sheet or such a resin sheet with a fabric or the like as a skin material are used.

일반적으로 발포 사출 성형 방법은 코어 백(Core Back) 방식을 통한 화학적 발포 방법과, 뮤셀 발포로 널리 알려져 있는 사출 실린더에 초임계가스(N2,CO2)를 주입하여 수지와 혼합하는 방식으로 사출하는 물리적 발포 방법으로 분류할 수 있다. In general, the foam injection molding method is a chemical foaming method through a core back method, and a supercritical gas (N 2 ,CO 2 ) injected into an injection cylinder widely known as mucell foaming and mixed with a resin. It can be classified as a physical foaming method.

코어 백 방식의 발포 사출 성형 방법을 설명하면 다음과 같다. 사출기의 투입호퍼를 통해 PPF(PP에 고무와 탈크(Talc)라는 무기 충진제(filler)를 컴파운드한 소재) 소재분말과 발포제를 사출기 내부에 투입 및 혼합하고 용융시킨 다음, 발포제가 혼합된 용융수지를 금형 내부에 사출한다. 이어서 금형을 미세 형개하여 발포시키는 방식이다. 이 때, 미세 형개, 즉 캐비티(Cavity)를 확장 시키는 것을 코어 백(Core back)이라고 한다.A core-back type foam injection molding method will be described as follows. Through the injection hopper of the injection machine, PPF (a material made by compounding PP with rubber and an inorganic filler called talc) material powder and foaming agent are put into the injection machine, mixed and melted, and then the molten resin mixed with the foaming agent Injection into the mold. Then, the mold is finely molded and foamed. At this time, expanding the fine mold, that is, the cavity is called a core back.

그런데, 미국 등록번호 제08974223호에 코어 백을 이용하는 사출 발포 금형이 게시되어 있다. 이러한, 사출발포금형은 코어 백 시 상호 이격된 이동금형과 고정금형 사이로 용융 수지가 누출될 수 있는 문제점이 있다.By the way, an injection foam mold using a core back is posted in US Registration No. 08974223. Such an injection foam mold has a problem in that the molten resin may leak between the moving mold and the stationary mold spaced apart from each other during the core back.

한편, 소형 발포 제품의 경우에는 전동사출기를 이용하여 발포 사출이 비교적 용이하지만, 자동차에 사용되는 도어트림과 같은 대형 제품을 사출하는 경우에는 금형 무게로 인해 미세 제어가 어려우며 대형 전동 사출기의 가격이 고가여서 많은 비용이 발생 된다는 문제점이 있다.On the other hand, in the case of small foam products, foam injection is relatively easy using an electric injection machine, but in the case of injecting large products such as door trims used in automobiles, fine control is difficult due to the weight of the mold, and the price of large electric injection machines is high. There is a problem that a lot of costs are incurred.

그리고 인서트 몰드의 경우, 인서트 되는 부품이 대부분 금속으로 이루어져 있는데, 합성수지 코어를 이용한 인서트 몰딩의 경우, 합성수지가 용융되는 문제점이 있다. And in the case of an insert mold, most of the parts to be inserted are made of metal, but in the case of insert molding using a synthetic resin core, there is a problem in that the synthetic resin is melted.

대한민국 10-1032764호에는 인서트사출성형을 위한 금형이 게시되어 있다. 게시된 금형은 이를 위해 저면에 상부성형부와 복수개의 가이드축이 형성된 상부금형; 상부에 하부성형부와 상기 가이드축이 끼워지게 복수개의 가이드공이 형성된 하부금형; 및 상기 하부성형부에 제품을 인서트한 후 상부금형이 하강하여 하부금형에 밀착 맞닿게 되면 인서트 몰딩방식으로만 제품과 원료를 융착 고정시킴을 특징으로 구성된다.Republic of Korea No. 10-1032764 discloses a mold for insert injection molding. The posted mold includes an upper mold in which an upper molding part and a plurality of guide shafts are formed on the bottom for this purpose; a lower mold having a plurality of guide holes formed thereon so that the lower molding part and the guide shaft are fitted; and when the upper mold descends and comes into close contact with the lower mold after inserting the product into the lower molding part, the product and the raw material are fusion-fixed only by the insert molding method.

대한민국특허 공개특허공보 제10-2013-0017151호 : 다중 발포 사출공법을 이용한 자동차용 사이드 가니쉬 제조 장치 및 방법Korean Patent Laid-Open Patent Publication No. 10-2013-0017151 : Apparatus and method for manufacturing side garnish for automobile using multi-foaming injection method

본 발명은 상기와 같은 문제점을 해결하기 위한 것으로서, 성형을 위한 캐비티의 내부에 합성수지로 이루어진 인서트부재를 삽입한 상태로 성형할 수 있는 시트백 사출금형을 제공함에 있다. The present invention is to solve the above problems, and to provide a seatback injection mold that can be molded in a state in which an insert member made of a synthetic resin is inserted into a cavity for molding.

본 발명의 시트백 사출금형은 제1코어가 형성된 제1코어금형과, 상기 제1코어금형의 외측에 위치되어 상기 제 1코어금형과 함께 이동가능한 상판플레이트가 마련된 이동금형부와; The seatback injection mold of the present invention includes: a first core mold having a first core formed therein; and a movable mold part provided with a top plate positioned outside the first core mold and movable together with the first core mold;

상기 이동금형부와 결합되어 제품의 성형을 위한 캐비티가 형성될 수 있도록 상기 제1코어와 마주하는 제2코어가 형성되며 합성수지 인서트부재를 고정하기 위한 고정부가 마련된 고정금형부;를 구비한 것을 그 특징으로 한다. A second core facing the first core is formed so as to be coupled with the movable mold part to form a cavity for molding a product, and a fixed mold part provided with a fixing part for fixing the synthetic resin insert member; characterized.

본 발명에 따른 시트백을 이용하는 사출금형은 합성수지로 이루어진 인서트몰드를 이용하여 사출성형 할 수 있으므로 합성수지재로 이루어진 코어를 가진 사출성형품의 제조가 가능하다.Since the injection mold using the seatback according to the present invention can be injection molded using an insert mold made of synthetic resin, it is possible to manufacture an injection molded article having a core made of a synthetic resin material.

도 1은 성형을 위한 시트백의 사사도.
도 2는 본 발명에 다른 시트백 사출금형의 분리 사시도, 1 is a perspective view of a seatback for molding.
2 is an exploded perspective view of a seatback injection mold according to the present invention;

본 발명은 시트백 사출금형에 관한 것으로, 도 1은 시트백의 사시도이며, 도 2는 시트백 사출금형의 분리사시도이다. The present invention relates to a seatback injection mold, Figure 1 is a perspective view of the seatback, Figure 2 is an exploded perspective view of the seatback injection mold.

도면을 참고하면, 시트백 사출금형(1)은 합성수지재로 이루어진 인서트부재를 삽입하고 몰딩하여 시트백을 제조하기 위한 것으로, 상호 형합되는 이동금형부(100)와, 고정금형부(200)를 포함한다.Referring to the drawings, the seatback injection mold 1 is for manufacturing a seatback by inserting and molding an insert member made of a synthetic resin material, and includes a movable mold part 100 and a fixed mold part 200 that are molded together. .

이동금형부(100)는 하부에 제품의 성형을 위한 캐비티을 형성할 수 있도록 인입된 제1코어가 형성된 가동금형(110)과, 가동금형(110)과 결합되어 제1코어금형를 가동시키기 위한 상판플레이트(120)를 구비한다. The movable mold part 100 includes a movable mold 110 having a first core inserted therein so as to form a cavity for molding a product therein, and a top plate for moving the first core mold by being coupled to the movable mold 110 . (120) is provided.

고정금형부(200)는 캐비티를 형성하기 위한 제2코어금형(210)을 포함하는 고정금형(200)과, 이젝팅 판(260) 및 이 이젝트판(260)에 설치되는 이젝트 핀을 구비한다. The stationary mold part 200 includes a stationary mold 200 including a second core mold 210 for forming a cavity, an ejecting plate 260 and an ejection pin installed on the ejecting plate 260 . .

그리고 상기 고정금형(200)에는 시트백의 인서트부재(300)를 고정하기 위한 인서트부재고정부(300)를 구비한다. 상기 시트백의 인서트부재(300)은 합성수지재로 이루어지는데, 인서트부재를 이루는 합성수지재의 용융점보다 상대적으로 높은 용융점을 가진다. . And the fixing mold 200 is provided with an insert member fixing part 300 for fixing the insert member 300 of the seatback. The insert member 300 of the seatback is made of a synthetic resin material, and has a melting point relatively higher than the melting point of the synthetic resin material constituting the insert member. .

상술한 바와 같은 구성을 갖는 시트백 사출금형은 제1코어금형을 가지는 이동금형부(100)을 고정금형부(200)에 형합하기전 상기 고정금형(200)의 케비티에 스티백의 인서트부재(300)을 위치 고정한다. In the seatback injection mold having the above-described configuration, the insert member 300 of the sticker bag is placed in the cavity of the stationary mold 200 before the movable mold part 100 having the first core mold is molded into the stationary mold part 200 . ) to fix the position.

그리고 상기 이동금형(100)과 고정금형(200)를 형합하여 시트백을 성형하기 위한 캐비티 형성 후, 스프루부쉬와 런너를 통해 캐비티내로 용융된 수지를 충전시킨다. And after forming a cavity for molding the seatback by molding the movable mold 100 and the stationary mold 200, the molten resin is filled into the cavity through the sprue bush and the runner.

성형이 완료되면 스트리퍼판으로부터 이동금형부(100)가 이격되어 캐비티(300)가 형개되는 단계가 이루어진다. 캐비티 형개 후, 이젝팅 판(260)이 승승하여 이젝팅 핀(261)이 성형된 제품을 캐비티로부터 분리시키는 이젝팅 단계를 수행한다. When the molding is completed, the moving mold part 100 is spaced apart from the stripper plate, and a step in which the cavity 300 is molded is made. After the cavity is opened, the ejecting plate 260 rises and the ejecting pin 261 performs an ejecting step of separating the molded product from the cavity.

본 발명에 따른 시트백 사출금형은 이동금형부가 고정금형부와 결합하기전 합성수지로 이루어진 인서트부재를 고정하고, 성형하게 되므로 성형성과 제품의 내구성을 향상시킬 수 있으며, 인서트부재를 고정하기 위한 금형설계의 자유도를 높일 수 있다. In the seatback injection mold according to the present invention, since the insert member made of synthetic resin is fixed and molded before the moving mold part is combined with the fixed mold part, moldability and durability of the product can be improved, and the mold design for fixing the insert member freedom can be increased.

이상에서 본 발명에 따른 시트백 사출금형 도면에 도시된 일 예를 참조로 설명하였으나 이는 예시적인 것에 불과하며, 당해 기술분야에서 통상의 지식을 가진자라면 이로부터 다양한 변형 및 균등한 타 실시 예가 가능하다는 점을 이해할 것이다. 따라서, 본 발명의 진정한 기술적 보호의 범위는 첨부된 청구범위의 기술적 사상에 의해 정해져야 할 것이다. In the above, an example shown in the drawing of the seatback injection mold according to the present invention has been described with reference, but this is merely exemplary, and those skilled in the art can make various modifications and equivalent other embodiments therefrom. will understand the point. Accordingly, the scope of true technical protection of the present invention should be defined by the technical spirit of the appended claims.

1 : 시트백 사출금형 100 : 이동금형부
200 : 고정금형부 300 : 캐비티1: seatback injection mold 100: moving mold part
200: fixed mold part 300: cavity

Claims (1)

제1코어가 형성된 제1코어금형과, 상기 제1코어금형의 외측에 위치되어 상기 제 1코어금형과 함께 이동가능한 상판플레이트가 마련된 이동금형부와;
상기 이동금형부와 결합되어 제품의 성형을 위한 캐비티가 형성될 수 있도록 상기 제1코어와 마주하는 제2코어가 형성되며 합성수지 인서트부재를 고정하기 위한 고정부가 마련된 고정금형부;를 구비한 것을 특징으로 하는 시트백 사출금형



a first core mold on which a first core is formed, and a movable mold part provided with a top plate positioned outside the first core mold and movable together with the first core mold;
A second core facing the first core is formed so as to be coupled to the movable mold part to form a cavity for molding a product, and a fixed mold part provided with a fixing part for fixing the synthetic resin insert member; characterized in that it is provided Seatback injection mold with
KR1020190152739A 2019-11-25 2019-11-25 Foam injection mold using sheet back KR20210063978A (en)

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KR20130017151A (en) 2011-08-10 2013-02-20 현대자동차주식회사 Device and method for manufacturing side garnish of vehicle

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130017151A (en) 2011-08-10 2013-02-20 현대자동차주식회사 Device and method for manufacturing side garnish of vehicle

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