KR102384442B1 - Manufacture method of urethane with multi-stage hardness - Google Patents

Manufacture method of urethane with multi-stage hardness Download PDF

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KR102384442B1
KR102384442B1 KR1020210010913A KR20210010913A KR102384442B1 KR 102384442 B1 KR102384442 B1 KR 102384442B1 KR 1020210010913 A KR1020210010913 A KR 1020210010913A KR 20210010913 A KR20210010913 A KR 20210010913A KR 102384442 B1 KR102384442 B1 KR 102384442B1
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South Korea
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urethane
hardness
foaming
injection mold
product
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KR1020210010913A
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Korean (ko)
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홍종학
박동진
이태수
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주식회사 에스케이에프
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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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B29C44/1219—Foaming between a movable mould part and the preformed part
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B29C44/1266—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being completely encapsulated, e.g. for packaging purposes or as reinforcement
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
    • B29C44/42—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum
    • 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
    • B29C45/1418—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 the inserts being deformed or preformed, e.g. by the injection pressure
    • 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
    • B29C45/14311—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 using means for bonding the coating to the articles
    • 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
    • B29C45/14778—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 the article consisting of a material with particular properties, e.g. porous, brittle
    • B29C45/14795—Porous or permeable material, e.g. foam
    • 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
    • B29C45/16—Making multilayered or multicoloured articles
    • 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
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/36—After-treatment
    • C08J9/365—Coating

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

The present invention relates to a method for manufacturing urethane with multi-stage hardness and is to remove the curing phenomenon of the end of first urethane while manufacturing a product with different hardness in multiple stages for each part to alleviate the inconvenience in which the hardness is the same in the case of interior materials such as car seats, etc., armrests, or bicycle saddles manufactured by foaming urethane. The present invention comprises three steps of: placing a first injection mold (5) on a resin injection-molded product (1) and foaming first hard urethane (2) having a high-strength urethane hardness of 30 to 50; placing a second injection mold (6) on the first urethane (2) in a polymer-treated state and foaming second soft urethane (3) having a urethane hardness of 10 to 20; and finishing a product by applying the first urethane (2) and the second urethane (3) to an outer layer (7). Blades (4, 4a) are formed on both sides and all sides of the lower end of the second injection mold (6), and the second urethane (3) is foamed at a distance from the first urethane (2) by the blades (4, 4a) to remove the curing phenomenon of the end of the first urethane.

Description

다단 경도를 갖는 우레탄 제조방법 {Manufacture method of urethane with multi-stage hardness}Manufacturing method of urethane with multi-stage hardness {Manufacture method of urethane with multi-stage hardness}

본 발명은 다단 경도를 갖는 우레탄 제조방법에 관한 것으로, 특히 기존에 우레탄을 발포하여 제조된 자동차 시트 등의 내장재나 암레스트 또는 자전거 안장의 경우에 경도가 동일하게 제조되어 사용상의 불편함이 있던 것을 해소하기 위하여 제품을 부분별로 다단으로 경도를 다르게 제조함과 함께 제1우레탄 끝단의 경화현상을 제거할 수 있도록 한 것이다.The present invention relates to a method for manufacturing urethane having multi-stage hardness, and in particular, in the case of interior materials such as automobile seats or armrests or bicycle saddles manufactured by foaming urethane in the past, the hardness is the same, and there is inconvenience in use. In order to solve the problem, the hardness of the first urethane end can be eliminated while the product is manufactured with different hardness in multiple stages for each part.

일반적으로 우레탄은 시트 부재용 발포소재, 폴리이소시아네이트, 폴리올, 물이 중합해서 발열을 동반하면서 일어나는 복잡한 화학반응에 의해 형성되며, 반응 속도를 조절해서 폴리올의 기수(基數)를 변화시켜 경도를 바꿀 수 있는 특징을 갖고 있다.In general, urethane is formed by a complex chemical reaction that occurs when the foam material for sheet members, polyisocyanate, polyol, and water polymerize and generate heat. has characteristics.

예를 들어, 차량용 시트를 설치하기 위하여 프레임을 발포 금형에 넣고, 발포 금형에 우레탄을 주입한 후 가열하여 발포시킴으로써 발포우레탄시트를 제조하고, 프레임을 차실 내부의 고정 구조물에 고정시키고 그 위에 천연가죽이나 인조가죽으로 제작된 시트커버를 씌워 고정한다.For example, in order to install a vehicle seat, a frame is placed in a foam mold, urethane is injected into the foam mold, and then heated and foamed to manufacture a foam urethane sheet, and the frame is fixed to a fixed structure inside the vehicle, and natural leather is placed on it. Cover the seat cover made of artificial leather or fix it.

따라서, 승차자가 시트에 착석하면, 승차자의 등 부분과 허벅지 등 신체가 얇은 두께의 시트커버를 통하여 상기 발포우레탄시트의 해당부분에 밀착되므로 발포우레탄시트의 해당부분은 가급적 부드러운 재질로 발포되어야 승차자에게 안락감을 줄 수 있는 반면에, 발포우레탄시트는 승차자를 보호하고 시트 형태가 유지되도록 하기 위하여 내장된 프레임과 함께 형태가 유지되어야 하므로 발포우레탄시트의 둘레는 비교적 단단한 재질로 제조되어야 할 필요가 있다.Therefore, when the passenger sits on the seat, the body of the passenger, such as the back and thigh, is in close contact with the corresponding part of the foam urethane sheet through the thin seat cover, so the corresponding part of the foam urethane sheet should be foamed with a soft material as much as possible to the passenger. On the other hand, the urethane foam sheet needs to be made of a relatively hard material because the foam urethane sheet must be kept in shape with the built-in frame in order to protect the occupant and maintain the seat shape.

또한, 차량에는 탑승자가 팔을 쉬기 위해서 사용하는 편의 제품인 암레스트가 구비되어 있어 운전자가 운전시 팔을 암레스트에 거치하는 등의 용도로 사용되고 있는데, 이와 같은 암레스트의 경우에도 통상적으로 우레탄을 동일하게 사용하여 제조하고 위에 인조가죽 등의 커버를 씌워 고정한다.In addition, the vehicle is equipped with an armrest, which is a convenience product used by passengers to rest their arms, and is used for purposes such as mounting the arm on the armrest while driving. It is manufactured and fixed by putting a cover such as artificial leather on it.

즉, 종래의 암레스트의 경우에는 도 1과 같이, 우레탄을 사용하여 제조시, 수지사출물(10)위에 우레탄(20)을 발포하고 그 위에 커버(30)를 씌워 하나의 암레스트를 제조하는데 전체 발포되는 우레탄(20)의 강도가 동일하게 제조하므로 암레스트의 경우, 하부지지대는 단단하게 형성되어도 팔을 거치하는 부분은 좀더 푹신푹신해야 함에도 불구하고 어느 부분이나 경도가 같은 우레탄을 사용하여 제조하므로 사용상의 불편함을 주게 되는 결점이 있었다. That is, in the case of the conventional armrest, as shown in FIG. 1 , when manufacturing using urethane, the urethane 20 is foamed on the resin injection product 10 and the cover 30 is covered thereon to manufacture one armrest. Since the foamed urethane 20 is manufactured with the same strength, in the case of the armrest, even though the lower support is rigidly formed, the part that mounts the arm should be more fluffy, but all parts are manufactured using urethane having the same hardness. There was a defect that gave inconvenience to use.

또한, 종래에는 도 2와 같이, 수지사출물(10)위에 우레탄(20)을 발포하고 인젝션몰드(6a)를 통해 우레탄(20)위에 강도가 다른 우레탄(31)을 발포하여 제품을 구성하는 것이 제안되었으나, 우레탄(20)의 끝단에 경화현상(H)이 발생하여 강도가 다른 우레탄(31)을 주입시 제품이 제대로 매끈하게 제조되지 못하는 결점이 있었다.In addition, in the prior art, as shown in FIG. 2 , it is proposed to foam the urethane 20 on the resin injection product 10 and foam the urethane 31 with different strength on the urethane 20 through the injection mold 6a to configure the product. However, there was a defect that the hardening phenomenon (H) occurred at the end of the urethane 20, so that when the urethane 31 having different strength was injected, the product could not be smoothly manufactured properly.

특허출원번호 제10-2014-0123678호Patent Application No. 10-2014-0123678

본 발명은 이와 같은 종래의 결점을 해결하기 위한 것으로, 본 발명의 목적은, 수지사출물 위에 강도가 다르게 다단으로 우레탄을 발포하거나 또는 우레탄을 다단으로 접착제 등으로 부착하여 제품의 일부분은 강하게 제조함과 동시에 다른 부분은 약하게 제조할 수 있는 것으로, 제1우레탄의 끝단에서 발생되는 경화현상을 제거할 수 있는 다단 경도를 갖도록 하는 우레탄 제조방법을 제공하는데 있다.The present invention is to solve such conventional drawbacks, and an object of the present invention is to foam urethane in multiple stages with different strengths on a resin injection or to attach urethane in multiple stages with an adhesive, etc. At the same time, the other part is to provide a urethane manufacturing method that can be manufactured weakly, and has a multi-stage hardness that can remove the curing phenomenon occurring at the end of the first urethane.

이와 같은 목적을 달성하기 위한 본 발명은 수지사출물 위에 30~50의 강도의 우레탄경도를 갖는 제1우레탄을 제1인젝션몰드를 통해 발포하는 제1단계, 상기 제1우레탄에 경도가 다른 2차 발포할부분에 접착용으로 폴리머처리를 하고 양측 또는 사방에 칼날이 형성된 제2인젝션몰드를 제1우레탄위에 위치시켜 노즐을 통해 10~20의 우레탄경도를 갖는 제2우레탄을 발포하여 제2우레탄 양끝단이 칼날에 의해 일정간격을 두고 발포되어 경화현상을 제거하는 제2단계, 상기 제1우레탄과 제2우레탄 위에 외피를 도포하여 제품을 완성하는 제3단계로 이루어짐을 특징으로 한다.The present invention for achieving the above object is a first step of foaming a first urethane having a urethane hardness of 30 to 50 on a resin injection through a first injection mold, secondary foaming having a different hardness in the first urethane Polymer treatment is applied to the part for adhesion, and the second injection mold with blades formed on both sides or all sides is placed on the first urethane, and the second urethane having a urethane hardness of 10 to 20 is foamed through a nozzle to both ends of the second urethane. It is characterized in that it consists of a second step of removing the curing phenomenon by foaming at a predetermined interval by the blade, and a third step of completing the product by coating the outer skin on the first and second urethane.

또한, 본 발명은 수지사출물위에 30~50의 강도의 우레탄경도를 갖는 제1우레탄을 오픈상태에서 발포하고 덮개를 닫는 제1단계, 상기 제1우레탄에 경도가 다른 2차 발포할부분에 양측이나 사방에 칼날이 형성된 제2인젝션몰드를 위치시켜 10~20의 우레탄경도를 갖는 제2우레탄을 발포하고 덮개를 닫아 제2우레탄 양끝단이 칼날에 의해 일정간격을 두고 발포되므로 경화현상을 제거하는 제2단계, 상기 제1우레탄과 제2우레탄 위에 외피를 도포하여 제품을 완성하는 제3단계로 이루어짐을 특징으로 한다.In addition, the present invention provides a first step of foaming a first urethane having a urethane hardness of 30-50 on a resin injection in an open state and closing the cover, on both sides of the second foaming part having a different hardness to the first urethane. The second injection mold with blades formed on all sides is placed to foam the second urethane having a urethane hardness of 10 to 20, and the cover is closed so that both ends of the second urethane are foamed at regular intervals by the blade, so the agent removes the curing phenomenon. Step 2, characterized in that it consists of a third step of completing the product by coating the outer skin on the first urethane and the second urethane.

이상과 같은 본 발명은 수지사출물 위에 강도가 다르게 우레탄을 발포하거나 또는 부착하여 제품의 일부분인 제1우레탄은 강하게 제조함과 동시에 제2우레탄은약하게 제조하여 암레스트 등의 제품에 다단 경도를 갖도록 함으로써 사용 부분에 따라 다른 경도로 제조하되, 제1우레탄 위에는 양측으로 칼날이 형성된 인젝션몰드를 통해 제2우레탄을 발포함으로써 제1우레탄 양끝단의 경화현상을 제거할 수 있는 효과가 있다.As described above, the present invention is made by foaming or attaching urethane with different strength on the resin injection to make the first urethane, which is a part of the product, strong, and at the same time, make the second urethane weak to have multi-stage hardness in products such as armrests. Although manufactured with different hardness depending on the part used, the curing phenomenon of both ends of the first urethane can be eliminated by foaming the second urethane through an injection mold having blades formed on both sides on the first urethane.

도 1은 종래 수지사출물에 우레탄을 발포한 제품의 단면도
도 2는 종래 우레탄의 경화현상을 나타낸 단면도
도 3은 본 발명의 제조순서를 설명하기 위한 단면도
도 4는 본 발명에 따라 완성된 우레탄 완성제품의 단면도이다. 1 is a cross-sectional view of a conventional resin injection product in which urethane is foamed;
2 is a cross-sectional view showing a curing phenomenon of a conventional urethane;
3 is a cross-sectional view for explaining the manufacturing sequence of the present invention;
4 is a cross-sectional view of the finished urethane product according to the present invention.

이하, 본 발명의 실시예를 첨부된 도면을 참고로 하여 상세히 설명하면 다음과 같다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 3은 본 발명의 제조순서를 설명하기 위한 단면도이고, 도 4는 본 발명에 따른 우레탄 완성제품의 단면도를 나타낸 것이다. Figure 3 is a cross-sectional view for explaining the manufacturing procedure of the present invention, Figure 4 is a cross-sectional view showing a urethane finished product according to the present invention.

이에 도시된 바와 같이, 수지사출물(1) 위에 제1인젝션몰드(5)를 위치시키고 노즐을 통하여 일차적으로 30~50의 고강도의 우레탄경도를 갖는 경질의 제1우레탄(2)을 발포한다.As shown in this figure, the first injection mold 5 is positioned on the resin injection 1, and the first hard urethane 2 having a high-strength urethane hardness of 30-50 is first foamed through a nozzle.

또한, 상기 제1우레탄(2)위의 발포된 부분에 폴리머 처리를 한 상태에서 제2인젝션몰드(6)를 위치시키고 노즐을 통하여 제2우레탄(3)을 발포한다.In addition, the second injection mold 6 is positioned in a state in which the polymer is treated on the foamed part on the first urethane 2 and the second urethane 3 is foamed through the nozzle.

즉, 상기 경질의 제1우레탄(2)위에 이차적으로 10~20의 경도를 갖는 연질의 제2우레탄(3)을 발포한다. That is, the second soft urethane (3) having a hardness of 10 to 20 is secondarily foamed on the hard first urethane (2).

이때, 상기 제2인젝션몰드(6)의 하단부 양측에는 칼날(4)(4a)이 일체형으로 형성되어 있어 상기 제2우레탄(3)의 발포시 이러한 칼날(4)(4a)에 의해 제1우레탄(2)과 칼날(4)만큼의 간격을 두고 발포된다.At this time, the blades 4 and 4a are integrally formed on both sides of the lower end of the second injection mold 6, so that when the second urethane 3 is foamed, the first urethane is formed by the blades 4 and 4a. (2) and the blade (4) are spaced apart.

따라서, 상기 제2인젝션몰드(6)의 칼날(4)(4a)에 의해 제1우레탄(2)에 발포액이 침투되지 않아 제2우레탄(3)이 발포할 부분만 발포되어 제1우레탄(2)과 제2우리탄(3)이 만나는 지점의 경계가 구분되어 각각의 원하고자 하는 발포경도를 얻을 수 있다.Therefore, the foaming liquid does not penetrate into the first urethane 2 by the blades 4 and 4a of the second injection mold 6, so that only the portion where the second urethane 3 is to be foamed is foamed, and the first urethane ( The boundary of the point where 2) and the second urite (3) meet is divided, so that each desired foaming hardness can be obtained.

즉, 상기 칼날(4)(4a)에 의해 제1우레탄(2)으로 발포액이 넘치는 현상을 방지할 수 있어 딱딱하게 경화되는 현상을 제거할 수 있다.That is, it is possible to prevent the overflow of the foaming liquid into the first urethane 2 by the blades 4 and 4a, thereby eliminating the phenomenon of hardening.

여기서, 상기 양측에 칼날(4)(4a)이 형성되거나 또는 사방에 칼날이 형성될 수도 있다.Here, the blades 4 and 4a are formed on both sides or the blades may be formed in all directions.

따라서, 상기 제2인젝션몰드(6)의 칼날(4)(4a)에 의해 제1우레탄(2)에 발생되는 발포현상을 제거할 수 있게 된다.Accordingly, it is possible to eliminate the foaming phenomenon occurring in the first urethane 2 by the blades 4 and 4a of the second injection mold 6 .

이후, 도 4와 같이, 제1우레탄(2)과 제2우레탄(3)위에 전체적으로 외피(7)를 도포하여 제품을 완성하면, 사람의 팔이 닿는 부분이나 안장에서 히프가 닿는 부분에 연질의 제2우레탄(3)부분이 위치되어 딱딱하지 않으므로 사용상의 편리성을 주게 되는 것이다. After that, as shown in FIG. 4, when the outer skin 7 is applied as a whole on the first urethane (2) and the second urethane (3) to complete the product, the soft material is applied to the part where the human arm touches or the part where the hip touches the saddle. Since the second urethane (3) part is located and not hard, it gives convenience in use.

한편, 상기 실시예에서는 인젝션몰드를 통해 우레탄을 주입하여 발포하는 과정을 기재하였으나, 인젝션몰드를 사용하지 않은 오픈 상태에서 발포하고 덮개를 닫아 사출물에 붙도록 하는 과정을 통해 제조할 수도 있다.On the other hand, although the above embodiment describes the process of foaming by injecting urethane through the injection mold, it may be manufactured through the process of foaming in an open state without using the injection mold and closing the cover to adhere to the injection molded product.

상기 우레탄의 주재료는, 분자말단에 2개 이상의 수산기(-OH)를 갖고 있는 유기화합물인 폴리올과, 분자에 이소시아네이트기(-NCO)를 함유하고 있는 유기화합물인 이소시아네이트가 결합하여 얻어지는 폴리우레탄수지를 주성분으로 하는 것이 바람직하다.The main material of the urethane is a polyurethane resin obtained by combining a polyol, an organic compound having two or more hydroxyl groups (-OH) at the molecular terminal, and an isocyanate, an organic compound containing an isocyanate group (-NCO) in the molecule. It is preferable to set it as a main component.

상술한 바와 같은 본 발명은 상기 실시예에 한정되지 않고, 본 발명이 의도하는 요지 및 개념 내에서 다양하게 변화시켜 실시하는 것이 가능하다.The present invention as described above is not limited to the above embodiments, and it is possible to carry out various changes within the intended gist and concept of the present invention.

1:수지사출물 2:제1우레탄
3:제2우레탄 4,4a:칼날
5:제1인젝션인젝션몰드 6:제2인젝션인젝션몰드
7:외피1: resin injection 2: first urethane
3: 2nd urethane 4, 4a: blade
5: First injection injection mold 6: Second injection injection mold
7: Outer sheath

Claims (2)

수지사출물(1)위에 30~50의 강도의 우레탄경도를 갖는 제1우레탄(2)을 제1인젝션몰드(5)를 통해 1차로 발포하는 제1단계,
상기 제1우레탄(2)에 경도가 다른 2차 발포할부분에 접착용으로 폴리머처리를 하고 양측에 칼날(4)(4a)이 형성된 제2인젝션몰드(6)를 제1우레탄(2)위에 위치시키고 10~20의 우레탄경도를 갖는 제2우레탄(3)을 2차로 발포하여 제2우레탄(3) 양끝단이 칼날(4)(4a)에 의해 일정간격을 두고 발포되어 제1우레탄(2)에 발포액이 침투되지 않도록 하는 제2단계로 이루어짐을 특징으로 하는 다단 경도를 갖는 우레탄 제조방법.A first step of first foaming a first urethane (2) having a urethane hardness of 30-50 on the resin injection (1) through a first injection mold (5);
Polymer treatment is applied to the secondary foaming part having different hardness to the first urethane (2), and the second injection mold 6 having knives 4 and 4a formed on both sides is placed on the first urethane 2 The second urethane (3) having a urethane hardness of 10 to 20 is secondarily foamed, and both ends of the second urethane (3) are foamed at regular intervals by the blades (4) (4a) and the first urethane (2) . 삭제delete
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003237442A (en) * 2002-02-14 2003-08-27 Bridgestone Corp Vehicular seat back
JP2003252092A (en) * 2002-02-26 2003-09-09 Combi Corp Support device for child, and method for manufacturing the same
JP2014128359A (en) * 2012-12-28 2014-07-10 Toyo Tire & Rubber Co Ltd Seat cushion pad
KR20140123678A (en) 2013-04-15 2014-10-23 한국교통대학교산학협력단 Modified 4-way valve and heat pump system using the modified 4-way valve
KR20190001646A (en) * 2017-06-27 2019-01-07 현대자동차주식회사 Manufacturing method of slim foam pad for vehicle seat and slim foam pad for vehicle seat manufactured by method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003237442A (en) * 2002-02-14 2003-08-27 Bridgestone Corp Vehicular seat back
JP2003252092A (en) * 2002-02-26 2003-09-09 Combi Corp Support device for child, and method for manufacturing the same
JP2014128359A (en) * 2012-12-28 2014-07-10 Toyo Tire & Rubber Co Ltd Seat cushion pad
KR20140123678A (en) 2013-04-15 2014-10-23 한국교통대학교산학협력단 Modified 4-way valve and heat pump system using the modified 4-way valve
KR20190001646A (en) * 2017-06-27 2019-01-07 현대자동차주식회사 Manufacturing method of slim foam pad for vehicle seat and slim foam pad for vehicle seat manufactured by method thereof

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