KR100227214B1 - Making method for mid-sole - Google Patents

Making method for mid-sole Download PDF

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Publication number
KR100227214B1
KR100227214B1 KR1019970045995A KR19970045995A KR100227214B1 KR 100227214 B1 KR100227214 B1 KR 100227214B1 KR 1019970045995 A KR1019970045995 A KR 1019970045995A KR 19970045995 A KR19970045995 A KR 19970045995A KR 100227214 B1 KR100227214 B1 KR 100227214B1
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finished product
semi
eva
injection molding
manufacturing
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KR1019970045995A
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Korean (ko)
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KR19990024703A (en
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김윤철
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김윤철
주식회사선택
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    • AHUMAN NECESSITIES
    • A43FOOTWEAR
    • A43DMACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D8/00Machines for cutting, ornamenting, marking or otherwise working up shoe part blanks
    • A43D8/02Cutting-out
    • AHUMAN NECESSITIES
    • A43FOOTWEAR
    • A43BCHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00Soles; Sole-and-heel integral units
    • A43B13/14Soles; Sole-and-heel integral units characterised by the constructive form
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D35/00Producing footwear
    • B29D35/12Producing parts thereof, e.g. soles, heels, uppers, by a moulding technique
    • B29D35/128Moulds or apparatus therefor

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

본 발명은 EVA발포 스펀지로 제조되는 통상의 신발용 중창을 성형하는 방법에 있어서, 종래 중간 제조과정인 발포스펀지 시이트화 공정을 생략하여 EVA소재를 일반 사출기를 사용하여 완제품에 가까운 반제품을 예비 성형하고 이 반제품을 기존의 열프레스 금형에 내압하여 열압 성형하므로서 중창의 제조공정상 제품의 양산성, 경제성, 균일성, 재료절감 등의 효과를 가져올 수 있도록 한 것으로, 이의 구성은, 운동화류의 신발중창을 제조함에 있어서, 보강제등 필요한 부가제가 배합된 EVA수지 재료를 발포시이트화하는 공정을 생략하고 일반 사출기에 의하여 완제품을 근접한 반제품을 예비적으로 사출 성형한 다음, 이를 사이즈 별로 완제품 금형인 통상의 열프레스 몰드에 내입하여 140°내지 160°범위의 소성 온도에서 열압 성형한 후, 이를 냉각 인출하여 완제품화 한 것에 특징이 있다.The present invention is a method of molding a conventional shoe midsole made of EVA foam sponge, by omitting the foam sponge sheeting process of the conventional intermediate manufacturing process to pre-molded the semi-finished product close to the finished product using a general injection machine EVA material The semi-finished product was pressurized into the existing hot press mold and thermo-formed to bring about mass production, economic efficiency, uniformity, and material saving effect of the midsole manufacturing process. In manufacturing, omitting the process of foaming the EVA resin material containing necessary additives such as a reinforcing agent, and preliminarily injection molding the semi-finished product close to the finished product by a general injection molding machine, and then using the normal heat press that is a finished product mold by size It is inserted into a mold and thermo-formed at a firing temperature in the range of 140 ° to 160 °, and then cooled out It is characterized by an open Tues finished.

Description

공정을 단순화한 신발중창의 제조방법Shoe sole manufacturing method simplified process

본 발명은 각종 신발류의 중창(Midsole)으로 사용되고 있는 파일론(PHYLON MOLDED EVA)과 인젝션 파일론(INJECTION PHYLON: EVA 사출성형)에 대한 제조공정을 단축하므로서 재료절감 효과와 더불어 고품질의 규격 제품을 능률적으로 양산할 수 있도록 한 것이다.The present invention shortens the manufacturing process for PHYLON MOLDED EVA and INJECTION PHYLON (EJ injection molding), which are used as midsoles for various footwear. It is to be done.

종래의 일반화된 EVA신발 중창의 제조방법은 도2에 도시한 바와 같이 EVA수지 재료를 여러 단계의 공정에 걸쳐서 믹싱, 가열, 가압, 발포 과정을 거쳐 시이트화하고 이를 다시 소정 두께로 스카이빙(SKIVING), 재단(CUTTING), 반제품 가공(원하는 제품 형태와 유사한 모양으로 grindig하는 작업)을 한 후 마지막 단계에서 규격 사양별로 열프레스 금형에 또다시 내입하여 완성된 제품을 열압(熱壓)성형시키는 제조방법을 채용하고 있다.In the conventional method for manufacturing a generalized EVA shoe midsole, as shown in Fig. 2, the EVA resin material is sheeted through a mixing, heating, pressing, and foaming process in several steps, and then skiving to a predetermined thickness. ), Cutting, and semi-finished product processing (grinding to a shape similar to the desired product shape), and then inserting it into a heat press mold according to the specification at the final stage, and then thermoforming the finished product. We adopt method.

따라서 이러한 종래의 제조방법은 EVA스펀지의 로스(Loss)가 약 50% 정도 가까이 발생하므로 재료 손실과 산업쓰레기의 다량 산출이 불가피한 비경제성과 제조에 따른 양산 효율이 낮고 인력 소모가 많아 제조 코스트가 높은 등 여러 가지 문제점이 따라 기초 신발 소재의 가공을 점차 저임금 국가에 이전하여 역수입하여야 하는 등 신발산업의 사양화가 가속화되는 실정이었다.Therefore, in the conventional manufacturing method, the loss of the EVA sponge is about 50%, which is inevitable for material loss and the large amount of industrial waste, which is unavoidable, low mass production efficiency due to manufacturing, high labor cost, etc. As a result of various problems, the specification of the footwear industry has been accelerated, such as the processing of basic footwear materials to be gradually relocated to low-wage countries.

본 발명은 이러한 문제점에 착안하여 EVA소재를 발포 시이트화 한 후 재단하여 2차 성형에 의해 제품을 완성하는 제조시스템으로 부터 중간 과정인 발포시이트화과정을 없애는 대신 EVA소재를 일반 인젝션 머신(INJECTION MACHINE, 이하 일반사출기라함)을 이용하여 최종 제품을 성형하기 전단계로서 반제품을 사출 성형하고 이 반제품을 각 사이즈별로 통상적인 열프레스 가공 공정에 전환될 수 있게 하여 공정의 단순화, 제품 균일화, 표준화 및 양산 효율과 원가 코스트의 절감 효과를 동시에 달성할 수 있도록 한 것이다.In view of the above problems, the present invention is a general injection machine (INJECTION MACHINE) instead of eliminating the foam sheeting process, which is an intermediate process, from the manufacturing system that foams the EVA material and cuts and completes the product by secondary molding. As a step before molding the final product by using a general injection molding machine, injection molding a semi-finished product and converting the semi-finished product into a conventional heat press processing process for each size, simplifying the process, product uniformity, standardization and mass production efficiency The cost savings can be achieved at the same time.

본 발명이 목적으로 하는 신발 중창의 제조방법을 해결하기 위한 과제로서는 종래의 중간 공정인 EVA발포시이트화 작업을 없애는 대신 일반 사출기로서 반제품을 성형하여야 한다.As a problem to solve the manufacturing method of the shoe midsole for the purpose of the present invention, the semi-finished product should be molded as a general injection machine instead of eliminating the EVA foaming sheet work, which is a conventional intermediate process.

따라서 이러한 목적을 달성하기 위하여서는 EVA소재를 통상의 보강제, 발포제 등을 혼합하여 재료 배합을 하고 이를 사출 성형과정에서 소정의 발포율 경도를 유지시키기 위한 재료 배합상의 표준화가 시도되어야 한다.Therefore, in order to achieve this purpose, the EVA material should be mixed with a conventional reinforcing agent, foaming agent, etc. to mix the material, and this should be attempted to standardize the material formulation to maintain a predetermined foaming rate hardness during the injection molding process.

이는 재료 특성에 따라서 그리고 제품의 용도(신발의 특성)에 따라서 적합한 데이터를 선정하여 EVA수지 재질을 선택적으로 적용하여 한다.This is done by selectively applying EVA resin materials by selecting the appropriate data according to the material properties and the purpose of the product (shoe characteristics).

이러한 재료 특성에 부합되는 재질 선택상의 재료배합 테크닉은 본 발명의 요지가 아니므로 이의 구체적인 예시는 생략한다.The material mixing technique on the material selection that meets these material properties is not the gist of the present invention, and specific examples thereof will be omitted.

도1은 본 발명의 공정도1 is a process diagram of the present invention

도2는 기존 신발 중창의 제조공정 예시도Figure 2 is an illustration of the manufacturing process of the existing shoe midsole

본 발명의 신발 중창 제조방법은 도1의 예시 공정도에 따르는바, 이를 구체적으로 설명하면 다음과 같다.Method for manufacturing a shoe midsole of the present invention according to the exemplary process diagram of Figure 1, it will be described in detail as follows.

① 소재선택① Material selection

EVA수지 재료에 보강제, 발포제, 경화제 등 필요한 부가제를 배합하여 사출성형 소재로 선택한다.EVA resin material is selected as injection molding material by mixing necessary additives such as reinforcing agent, foaming agent and curing agent.

② 일반 사출기에 의한 반제품 성형② Semi finished product molding by general injection molding machine

상기 선택된 재료를 이용하여 일반 사출기를 이용하여 반제품을 성형한다.The semi-finished product is molded using a general injection machine using the selected material.

여기서 반제품이라 하면 신발 중창의 최종 제품화가 이루어지기 전에 소요(소요所要) 중창 규격에 근접한 러프모델(Rough Model)을 설정하여 이에 부합된 반제품 성형 몰드에 의해 사출성형하는 것을 말하며 이 반제품은 소요 신발 중창에 가까운 크기, 두께, 형태가 결정되는 것이다.Here, the semi-finished product refers to the injection molding of a semi-finished molding mold according to the semi-finished molding mold that is set to a rough model close to the midsole standard required before the final product of the shoe midsole is achieved. The size, thickness, and shape close to are determined.

③ 가열 프레싱에 의한 2차 성형③ Secondary molding by heat pressing

상기 공정에서 제조된 반제품을 대응되는 사이즈 별로 준비된 열프레스 금형에 내입하여 140°내지 160°범위에 걸쳐 적당한 소성온도(塑成)를 부여하므로서 완제품을 성형한다.The semi-finished product prepared in the above process is introduced into a heat press mold prepared for each corresponding size, and the finished product is molded by imparting a suitable firing temperature over a range of 140 ° to 160 °.

이 열프레싱 공정은 기존의 증기 가열 및 쿨링워터(Cooling Water) 순환 공급장치에 의하여 연속성형 된다.This hot pressing process is continuously molded by conventional steam heating and cooling water circulation feeders.

④ 완제품 성형④ Finished product molding

상기 공정에서 열프레스 성형되고 냉각 공정이 이행되면 이를 금형으로부터 취출하여 원하는 신발 중창을 제조 완성할 수 있다.When the hot press molding in the process and the cooling process is implemented it can be taken out from the mold to complete the desired shoe midsole.

본 발명 방법에 의한 각종 신발의 중창 제조방법은 도2에서 예시한 기존의 제조 공정중 EVA수지 재료를 발포 스펀지 시이트화하여 이를 스카이빙, 재단 공정을 거쳐 반제품을 성형하는 소위 시이트화 공정을 생략한 것으로 이의 산업적 효과는 기존의 방식에 비해 제조공정이 획기적으로 단축되고, 단순화된 결과를 가져와 인건비 절감, 시간단축은 물로 재료 로스가 없고 특히 제품의 균일화, 표준화가 가능하여 양질의 중창을 매우 경제적으로 양산할 수 있는 효과가 따르므로 신발 산업의 경쟁력을 높이는데 결정적인 기여를 한다고 확신할 수 있다.The midsole manufacturing method of various shoes according to the present invention omits the so-called sheeting process of forming a semi-finished product through foaming sponge sheeting of EVA resin material in the existing manufacturing process illustrated in FIG. The industrial effect is that the manufacturing process is significantly shortened compared to the existing method, and the result is a simplified result, which reduces labor cost and time, and there is no material loss with water. With the effect of mass production, you can be sure that it is a decisive contribution to increasing the competitiveness of the shoe industry.

Claims (1)

운동화류의 신발중창을 제조함에 있어서, 보강제 등 필요한 부가제가 배합된 EVA수지재료를 발포시이트화 하는 공정을 생략하고 일반 사출기에 의하여 완제품에 근접한 반제품을 예비적으로 사출 성형한 다음 이를 사이즈 별로 완제품 금형인 통상의 열프레스 몰드에 내입하여 140°내지 160°범위의 소성 온도에서 열압 성형한 후, 이를 냉각 인출하여 완제품화 함을 특징으로 하는 공정을 단순화한 신발중창의 제조방법.In manufacturing shoe soles for sports shoes, the process of foaming sheet of EVA resin material containing necessary additives such as reinforcing agent is omitted, and preliminary injection molding of semi-finished product close to the finished product is performed by general injection molding machine. A method of manufacturing a shoe sole which is simplified by incorporating into a conventional hot press mold and thermoforming at a firing temperature in the range of 140 ° to 160 °, and then cooling and drawing the finished product.
KR1019970045995A 1997-09-02 1997-09-02 Making method for mid-sole KR100227214B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000061444A (en) * 1999-03-26 2000-10-16 황차근 Midsole and manufacturing method thereof
KR100834131B1 (en) 2007-05-29 2008-06-02 공연섭 The insole for a shoe and the manufacturing method of it
KR102013905B1 (en) 2019-03-29 2019-08-23 한국신발피혁연구원 Manufacturing method of foam using the improved cmp process

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000061444A (en) * 1999-03-26 2000-10-16 황차근 Midsole and manufacturing method thereof
KR100834131B1 (en) 2007-05-29 2008-06-02 공연섭 The insole for a shoe and the manufacturing method of it
KR102013905B1 (en) 2019-03-29 2019-08-23 한국신발피혁연구원 Manufacturing method of foam using the improved cmp process

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