KR20000012580A - Manufacturing method for a liner of sports boots - Google Patents

Manufacturing method for a liner of sports boots Download PDF

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Publication number
KR20000012580A
KR20000012580A KR1019990057302A KR19990057302A KR20000012580A KR 20000012580 A KR20000012580 A KR 20000012580A KR 1019990057302 A KR1019990057302 A KR 1019990057302A KR 19990057302 A KR19990057302 A KR 19990057302A KR 20000012580 A KR20000012580 A KR 20000012580A
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KR
South Korea
Prior art keywords
liner
core
mold
fabric
sewing
Prior art date
Application number
KR1019990057302A
Other languages
Korean (ko)
Inventor
박전숙
Original Assignee
박전숙
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Application filed by 박전숙 filed Critical 박전숙
Priority to KR1019990057302A priority Critical patent/KR20000012580A/en
Publication of KR20000012580A publication Critical patent/KR20000012580A/en

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Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B5/00—Footwear for sporting purposes
    • A43B5/04—Ski or like boots
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B5/00—Footwear for sporting purposes
    • A43B5/04—Ski or like boots
    • A43B5/0401—Snowboard boots
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B5/00—Footwear for sporting purposes
    • A43B5/04—Ski or like boots
    • A43B5/0405—Linings, paddings or insertions; Inner boots
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B5/00—Footwear for sporting purposes
    • A43B5/04—Ski or like boots
    • A43B5/0486—Ski or like boots characterized by the material
    • 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
    • B29C44/34—Auxiliary operations
    • B29C44/58—Moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D35/00—Producing footwear
    • B29D35/12—Producing parts thereof, e.g. soles, heels, uppers, by a moulding technique
    • B29D35/128—Moulds or apparatus therefor
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • C08L75/04—Polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material

Abstract

PURPOSE: A liner manufacturing method is provided to be able to offer a liner in a high quality having an excellent wearing feeling and an effect of keeping warm. CONSTITUTION: The method has the steps of: cutting a fabric(1) contained with a sponge in cloth and making an inner cover in a sock shape by sewing; putting the inner cover(2) on a sock-shaped core(3); closing the metal mold after putting a certain amount of a poly urethane solution into a space between the inner cover and a metal mold; foam-molding the poly urethane solution; dividing the core from the metal mold and dividing the liner from the core by cutting one side of both sides of the liner; and cutting a thread tip generated on the outer side of the liner and sewing the upper opening unit of the liner.

Description

스포츠부츠용 라이너 제조방법{Manufacturing method for a liner of sports boots}Manufacturing method for a liner for sports boots {Manufacturing method for a liner of sports boots}

본 발명은 스포츠(스노우보드, 스키, 스케이트, 롤라스케이트) 부츠용 라이너 제조방법에 관한 것으로서, 보다 구체적으로는 직물지나 직물지에 스폰지(FOAM)류를 합포한 원단 외부에 폴리우레탄(P/U)층이 형성되는 라이너를 제조함으로써 착용감 및 보온효과가 우수한 고품질의 라이너를 제공할 수 있는 제조방법을 제공하고자 하는 것이다.The present invention relates to a method of manufacturing a liner for sports (snowboard, ski, skate, roll skate) boots, and more specifically, polyurethane (P / U) on the outside of the fabric in which sponges (FOAM) are incorporated into fabric paper or fabric paper. It is to provide a manufacturing method that can provide a high-quality liner excellent in fit and thermal insulation effect by manufacturing a liner is formed a layer.

스노우보드, 스키, 스케이트는 주로 눈 또는 얼음 위에서 즐기는 겨울 스포츠로서 이를 즐기는 자는 신체 중 지면의 차가운 기운을 접하게 되는 발을 보호하고자 한다.Snowboarding, skiing, and skating are winter sports that are primarily played on snow or ice, and those who enjoy them want to protect their feet from the cold energy of the ground.

상기한 스포츠를 즐기는 자들은 가격이 저렴하면서도 착용감이 우수하고 보온력이 띠어난 양말류를 제공받아 발이 차가운 기운에 의하여 손상되는 것을 보호하고자 한다. 그러기 위해서 이들은 두꺼운 천 등으로 되고 스폰지로 쿠션부가 마련되는 라이너를 신고 난 후에 부츠를 착용하여 발을 보호한다. 이때 착용하는 라이너는 보온성이 우수해야 함은 물론이고 신고 있을 때 편안함을 제공하여야 하며 나아가서는 저렴한 가격에 제공받을 수 있어야 함은 당연한 것이다.Those who enjoy the sports described above are provided with socks that are inexpensive and have excellent fit and warmth, and protect their feet from being damaged by cold energy. To do this, they wear a thick cloth, a liner with a cushioned cushion, and then wear boots to protect their feet. At this time, the liner to be worn should not only have excellent heat retention, but also provide comfort when worn, and should be able to be provided at a low price.

또한 롤러스케이트를 즐기는 자는 발목을 보호받을 수 있는 보호구를 제공받아 안전한 조건하에서 롤러스케이트를 즐기고자 한다. 이를 위해서는 발목부위에 적당한 보호구를 착용시켜야 하나 지금까지는 마땅한 보호구가 없었다.In addition, those who enjoy roller skating are provided with protective equipment to protect their ankles, and they want to enjoy roller skating under safe conditions. To do this, you must wear appropriate protection on the ankle, but until now there was no suitable protection.

일반적으로 사용되고 있는 라이너는 제조과정이 복잡하고 제조장비를 많이 필요로 하는 것으로 종래의 대표적인 라이너 제조방법을 상세히 살펴보면 하기와 같다.In general, the liner used is a complicated manufacturing process and requires a lot of manufacturing equipment.

- 비닐이나 원단을 사용하여 라이너를 제조하는 방법.-How to make a liner using vinyl or fabric.

1) 비닐이나 원단을 각 부위별로 재단한다.1) Cut the vinyl or fabric by each part.

2) 각 부위별로 재단된 조각을 접착제로 이어 붙이거나 재봉을 통하여 연결하여 라이너의 갑피형을 완성한다. 이때 재봉선은 내측으로 형성된다.2) Attach the pieces cut by each part with adhesive or connect through sewing to complete the upper shape of the liner. At this time, the sewing line is formed inward.

3) 상기 갑피형에 쿠션을 필요로 하는 발목, 뒤꿈치 부위에 소정크기로 마련되는 스폰지를 접착한다.3) Adhesion of the sponge to the ankle, the heel portion requiring a cushion to the upper shape is provided with a predetermined size.

4) 스폰지가 부착되는 갑피형의 내피를 재봉하여 갑피(UPPER)를 완성한다.4) The upper is completed by sewing the inner endothelium of the sponge attached to the sponge.

5) 성형기계(앞면 성형기)를 이용하여 상기 갑피에 라텍스사로 중창을 부착하여 앞면 성형을 한다.5) Using a molding machine (front molding machine), the upper is formed by attaching a midsole to the upper with a latex yarn.

6) 다음으로 또 다른 성형기계(뒷면성형기)를 이용하여 상기 갑피에 중창을 완전하게 부착하면 갑피가 라이너의 형상으로 성형된다.6) Next, when the midsole is completely attached to the upper by using another molding machine (back molding machine), the upper is molded into the shape of the liner.

7) 상기한 방법으로 완성되는 라이너 형상의 하측에는 아웃솔이 부착되며 이 부착 방법은 하기와 같은 두 개의 라인을 필요로 한다.7) The outsole is attached to the lower side of the liner shape completed by the above method, and this attachment method requires two lines as follows.

가) 일측 라인에는 상기 라이너형상 중창 하면을 버핑작업(브러쉬로 갈아내는 작업) 및 선처리 작업을 하고, 버핑작업된 중창에 접착제를 도포하여 열처리하고 이에 재차 접착제를 도포하여 열처리한다.A) One side line is buffing (grinding with brush) and pretreatment of the bottom of the liner-shaped midsole, heat-treated by applying an adhesive to the buffing midsole and heat-treated by applying the adhesive again.

나) 다른측 라인에는 중창에 붙일 아웃솔이 이동하며 아웃솔도 상기와 같은 버핑작업(브러쉬로 갈아내는 작업) 및 선처리 작업을 하고, 버핑작업된 아웃솔에 접착제를 도포하여 열처리하고 이에 재차 접착제를 도포하여 열처리한다.B) The outsole to be attached to the midsole is moved to the other side line, and the outsole is also subjected to the buffing work (grinding with brush) and pretreatment as above, and the adhesive is applied to the buffing outsole and heat treated, and then the adhesive is applied again. Heat treatment.

8) 상기 양측 라인에서 작업된 라이너 형상과 아웃솔을 접착한다.8) Bond the outsole with the liner shape worked on both lines.

9) 상기 접착된 중창과 아웃솔을 압착기로 압착하여 견고하게 접착한다.9) Compress the attached midsole and the outsole with a compress to firmly bond.

10) 다음으로 냉각과정(공냉)을 거쳐 완성된 라이너를 얻게 되는 것이다.10) Next, through the cooling process (air cooling) to obtain a completed liner.

이상에서 상세히 살펴 본 바와 같이 종래의 라이너 제조방법은 그 제조과정이 매우 복잡하고, 특히 성형기 및 압착기를 설치하여 사용하여야 하므로 시설비가 많이 들며 재단 및 재봉, 성형, 압축 등 각 공정별로 많은 인력을 필요로 하게 되어 제품의 단가를 높이는 주요원인이면서도 불량률이 높고 또한 라이너를 발에 착화시 재봉선이 발에 닫게 되는 등 이물감으로 인한 착용감이 떨어지고 보온력이 저하되는 등의 문제점들이 있었다.As described in detail above, the manufacturing method of the conventional liner is very complicated, and in particular, it is necessary to install and use a molding machine and a compactor, which requires a lot of facility costs and requires a lot of manpower for each process such as cutting, sewing, molding, and compression. The main reason for increasing the unit price of the product is a high defect rate, and there is a problem such that the wearing feeling due to the foreign body is reduced and the warming force is lowered, such as the sewing line is closed on the foot when the liner is ignited on the foot.

본 발명은 상기한 바와 같은 문제점을 해소할 수 있도록 안출한 것으로서, 본 발명의 목적은 가격이 저렴하면서도 착용감이 우수하고 보온성이 좋은 스포츠부츠용 라이너의 제조방법을 제공하고자 하는 것이다.The present invention has been made to solve the problems as described above, an object of the present invention is to provide a manufacturing method of the liner for sports boots with a low price, good fit and good warmth.

상기 목적을 달성하기 위해서는 직물지나 직물지에 스폰지(FOAM)류를 합포한 원단을 소정 크기별로 재단하고, 재봉공정과 접착공정으로 양발형상을 만들고 이를 코어에 씌운 다음 밀폐가능한 금형에 내입시키고, 상기 금형에 폴리우레탄(P/U) 원액을 사출하여 금형을 밀폐시킨 다음 약40℃의 온도에서 약 7∼8분 발포시킨 후 금형을 개방하고 코어에서 완성품을 분리시킴으로써 제품이 완성될 수 있도록 한 것에 본 발명의 기술적 과제가 있다.In order to achieve the above object, the fabric or the fabric containing the sponge (FOAM) in the fabric is cut into pieces by a predetermined size, and the sewing process and the bonding process to form a foot shape and cover it to the core and then embedded in a sealable mold, the mold After injection of polyurethane (P / U) stock solution to seal the mold, it was foamed at a temperature of about 40 ℃ for about 7-8 minutes, then the mold was opened and the finished product was separated from the core so that the product could be completed. There is a technical problem of the invention.

도 1은 본 발명의 제조방법을 설명하기 위한 간략도1 is a simplified view for explaining the manufacturing method of the present invention

☞ 도면의 주요부분에 사용된 부호에 대한 설명 ☜☞ Explanation of symbols used in the main part of the drawing ☜

1 : 원단2 : 내피1: fabric 2: inner skin

3 : 코어(core)4 : 금형3: core 4: mold

5 : 공간부6 : 열실5: space part 6: heat chamber

7 : 라이너7: liner

도 1은 본 발명의 제조방법을 설명하기 위한 간략도이다.1 is a simplified view for explaining the manufacturing method of the present invention.

본 발명은 직물지나 직물지에 스폰지(FOAM)류를 합포한 원단(1)의 외부에 폴리우레탄(P/U)층이 형성되는 라이너를 성형하는 것으로서, 이하 제조공정 등을 통하여 이를 상세히 설명하기로 한다.The present invention is to form a liner in which a polyurethane (P / U) layer is formed on the outside of the fabric (1) in which sponges (FOAM) are incorporated into fabric paper or fabric paper, and will be described in detail through the following manufacturing process. do.

<실시예><Example>

1) 재료준비;1) material preparation;

직물지나 직물지에 스폰지(FOAM)류(일반 스폰지, 네오프렌(Neoprene), RUBBER 발포스폰지, 라텍스 발포스폰지, 고밀도 발포스폰지 등)를 합포한 원단(1)을 준비한다.A fabric 1 prepared with foams (normal sponge, neoprene, rubber foam sponge, latex foam sponge, high-density foam sponge, etc.) on fabric paper or textile paper is prepared.

2) 재단 및 재봉;2) cutting and sewing;

상기 원단을 일정한 크기(SIZE)와 모양으로 재단하고 이를 재봉하여 양말 모양의 내피(2)를 완성한다.The fabric is cut into a certain size (SIZE) and shape and sewn to complete the endothelial 2 of the shape of the sock.

3) 코어착용3) Core Wear

소정 형상으로 만들어진 족(足) 모양의 코어(3)에 상기 공정으로 완성된 내피(2)를 씌운다.The endothelial 2 completed by the said process is overlaid on the core 3 of the group shape made into the predetermined shape.

4) 성형;4) molding;

내피(2)가 씌워진 상태의 코어(3)를 밀폐가능한 금형(4) 내부에 위치시키고, 내피와 금형(4) 사이의 공간부(5)에 일정량의 폴리우레탄 원액을 사출(주입)한다.The core 3 in which the endothelium 2 is covered is placed inside the sealable mold 4, and a predetermined amount of the polyurethane stock solution is injected (injected) into the space 5 between the endothelium and the mold 4.

상기 금형(4)은 코어(3)의 착탈이 가능하도록 양측으로 분리되고 상부를 뚜껑으로 개폐되도록 하는 쇼팅형이나, 양측으로만 분리되고 별도의 주입구를 갖는 인젝션형 중 선택 사용할 수 있다. 그리고 상기 금형(4)은 항상 상온 약 40℃를 유지할 수 있도록 한다.The mold 4 may be selected from a shorting type for separating the core 3 to be detachable from both sides and opening and closing the upper portion with a lid, or an injection type for separating the two sides and having a separate injection hole. And the mold 4 is to be always maintained at room temperature about 40 ℃.

5) 발포;5) foaming;

상기한 바와 같이 코어(3)를 내입한 금형(4)에 폴리우레탄 원액을 주입한 다음 상기 금형(4)을 약 40℃의 온도가 유지되는 열실(6)에 투입하여 약 7∼8분 둠으로써 금형(4) 내부의 폴리우레탄 원액이 발포 성형되도록 한다.As described above, the polyurethane stock solution is injected into the mold 4 into which the core 3 is inserted, and then the mold 4 is placed in a heat chamber 6 maintained at a temperature of about 40 ° C. and left for about 7 to 8 minutes. As a result, the polyurethane stock solution in the mold 4 is subjected to foam molding.

6) 코어분리;6) core separation;

상기 과정을 거친 금형(4)을 열고 폴리우레탄 원액이 발포 성형으로 형성된 상태의 라이너(7)가 씌워진 코어(3)를 금형(4)에서 분리하고 라이너(7)의 일측 또는 양측을 절단칼로 절단하여 코어(3)에서 분리한다.Opening the mold 4 through the above process, the core 3 covered with the liner 7 in a state where the polyurethane stock solution is formed by foam molding is separated from the mold 4, and one or both sides of the liner 7 are cut with a cutting knife. To separate from the core (3).

7) 마무리;7) finishing;

이상과 같은 과정을 통하여 만들어진 라이너(7)의 외형에 성형시 생성되는 사상팁을 사상하고 라이너(7)의 상단 개구부를 재봉한다. 이때 라이너(7)의 개구부를 재봉하지 않고 사용하여도 무방하다.The finishing tip generated during molding is mapped to the outer shape of the liner 7 made through the above process, and the upper opening of the liner 7 is sewn. At this time, the opening of the liner 7 may be used without sewing.

상기한 바와 같은 방법으로 제조될 수 있는 본 발명 라이너(7)는 직물지 또는 스폰지류가 합지된 직물지로 되는 원단(1)의 외부에 폴리우레탄 원액을 발포 성형하는 것으로서, 코어 외부에 금형을 위치시키고 이에 폴리우레탄 원액을 주입하기만 하면 되는 것으로서, 종래와 같이 별도로 성형기계 등을 마련하지 않아도 되므로 시설 투자비를 절감할 수 있으면서도 생산라인을 매우 간소하게 할 수 있게 되는 것이다.The liner 7 of the present invention, which can be produced by the method as described above, is a foam molding of the polyurethane stock solution to the outside of the fabric 1 of the fabric paper or the sponge-laminated fabric paper, and the mold is placed outside the core. Only by injecting the polyurethane stock solution, it is not necessary to provide a separate molding machine, etc. as in the prior art, it is possible to reduce the investment cost of the facility and to simplify the production line.

그리고 본 발명은 상기한 바와 같이 제조공정이 간소화되므로 소규모의 인력으로도 생산이 가능하게 되면서도 불량률을 현저히 줄일 수 있어 양질의 스포츠 부츠용 라이너를 생산할 수 있게 되는 것이다.And the present invention is to simplify the manufacturing process as described above it is possible to produce even a small manpower can significantly reduce the defective rate is to be able to produce a high quality sports boots liner.

한편, 본 발명에 의해 생산되는 라이너(7)는 라이너(7) 내부에 재봉선을 최소화하여 착화시 재봉선으로 인한 이물감을 줄일 수 있으며, 외부가 폴리우레탄으로 형성되므로 우수한 보온효과를 득할 수 있고, 라이너의 수명을 연장할 수 있으며, 금형을 이용하여 생산하므로 규격화된 라이너를 생산할 수 있게 되는 것이다.On the other hand, the liner 7 produced by the present invention can minimize the sewing line inside the liner 7 to reduce the foreign matter caused by the sewing line when ignited, and because the outside is formed of polyurethane to obtain excellent thermal insulation effect, liner It is possible to extend the life of the, and can be produced by using a mold to produce a standardized liner.

본 발명은 상술한 바와 같은 제조공정에 의해서 양질의 스포츠부츠용 라이너를 제조할 수 있는 것으로서, 제조공정이 간단하므로 적은 인력으로 착화감이 우수하고 보온효과가 뛰어난 고품질의 제품을 대량 생산할 수 있으므로 저렴한 가격에 이를 보급할 수 있는 이점을 득할 수 있는 매우 우수한 발명이다.The present invention is to produce a high-quality sports boots liner by the manufacturing process as described above, because the manufacturing process is simple, it is possible to produce a large amount of high-quality products with excellent ignition feeling and excellent thermal effect with a small manpower, low price It is a very excellent invention that can take advantage of it.

Claims (1)

직물지나 직물지에 스폰지(FOAM)류를 합포한 원단(1)을 재단하고 재봉하여 양말 모양의 내피(2)를 만드는 공정과;A step of cutting and sewing the fabric 1 including the sponges (FOAMs) on the fabric paper or the fabric paper to make a sock-shaped inner shell 2; 상기 내피(2)를 족(足) 모양의 코어(3)에 씌우는 공정과;Covering the endothelial 2 on the core 3 of a foot shape; 내피(2)가 씌워진 코어(3)를 밀폐가능한 금형(4) 내부에 위치시키고, 내피(2)와 금형(4) 사이의 공간부(5)에 일정량의 폴리우레탄(P/U) 원액을 주입 후 금형(4)을 밀폐한 다음 상기 금형(4)을 약 40℃가 유지되는 열실(6)에 투입하여 약 7∼8분 둠으로써 폴리우레탄 원액을 발포 성형하는 공정과;The core 3 covered with the endothelium 2 is placed inside the sealable mold 4, and a predetermined amount of polyurethane (P / U) stock solution is placed in the space 5 between the endothelium 2 and the mold 4. Sealing the mold (4) after injection and then foaming the polyurethane stock solution by putting the mold (4) in a heat chamber (6) maintained at about 40 ° C. for about 7 to 8 minutes; 상기 공정을 거친 금형(4)에서 코어(3)를 분리하여 폴리우레탄 원액이 발포 성형된 라이너(7)의 일측 또는 양측을 절단하여 코어에서 라이너(7)를 분리하는 공정과;Separating the core (3) from the mold (4) after the process to cut one or both sides of the liner (7) foamed polyurethane stock solution to separate the liner (7) from the core; 상기 공정을 통하여 만들어진 라이너(7)의 외형에 생성되는 사상팁을 절단하고 라이너(7)의 상단 개구부를 재봉하는 공정으로 되는 것을 특징으로 하는 스포츠부츠용 라이너 제조방법.Method of producing a liner for sports boots, characterized in that the process of cutting the finishing tip generated in the outer shape of the liner (7) made through the process and sewing the top opening of the liner (7).
KR1019990057302A 1999-12-13 1999-12-13 Manufacturing method for a liner of sports boots KR20000012580A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100428868B1 (en) * 2001-06-05 2004-04-28 조성희 shoes bottom piece method of producing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100428868B1 (en) * 2001-06-05 2004-04-28 조성희 shoes bottom piece method of producing

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