KR100200412B1 - Pneumatic tyre vulcanization method - Google Patents

Pneumatic tyre vulcanization method Download PDF

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Publication number
KR100200412B1
KR100200412B1 KR1019970031436A KR19970031436A KR100200412B1 KR 100200412 B1 KR100200412 B1 KR 100200412B1 KR 1019970031436 A KR1019970031436 A KR 1019970031436A KR 19970031436 A KR19970031436 A KR 19970031436A KR 100200412 B1 KR100200412 B1 KR 100200412B1
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South Korea
Prior art keywords
green case
curing bag
mold
vulcanization
tire
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KR1019970031436A
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Korean (ko)
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KR19990009142A (en
Inventor
인미환
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홍건희
한국타이어주식회사
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    • 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
    • B29D30/00Producing pneumatic or solid tyres or parts thereof
    • B29D30/06Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/0601Vulcanising tyres; Vulcanising presses for tyres
    • B29D30/0654Flexible cores therefor, e.g. bladders, bags, membranes, diaphragms
    • 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
    • B29D30/00Producing pneumatic or solid tyres or parts thereof
    • B29D30/06Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/0601Vulcanising tyres; Vulcanising presses for tyres
    • B29D30/0662Accessories, details or auxiliary operations
    • 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
    • B29D30/00Producing pneumatic or solid tyres or parts thereof
    • B29D30/06Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/0601Vulcanising tyres; Vulcanising presses for tyres
    • B29D30/0662Accessories, details or auxiliary operations
    • B29D2030/0666Heating by using fluids
    • 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
    • B29D30/00Producing pneumatic or solid tyres or parts thereof
    • B29D30/06Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/0601Vulcanising tyres; Vulcanising presses for tyres
    • B29D30/0662Accessories, details or auxiliary operations
    • B29D2030/0675Controlling the vulcanization processes

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)

Abstract

본 발명은 공기타이어의 가류방법에 관한 것으로, 큐어링백(3)이 삽입된 그린케이스(2)를 몰드(1)내부에 장착하고, 상기 큐어링백(3)에 고온의 증기가 내측증기파이프(8)를 통해 유입되도록 하여, 상기 그린케이스(2)의 내부를 예열시킬 수 있게 됨에 따라 그린케이스의 가류공정이 단축되어 생산성이 향상되도록 된 것이다.The present invention relates to a method of vulcanizing a pneumatic tire, wherein a green case (2) into which a curing bag (3) is inserted is mounted inside a mold (1), and high temperature steam is introduced into the curing bag (3). 8) to be introduced through the green case 2, so that the preheating process of the green case 2 is shortened, thereby improving productivity.

Description

공기타이어의 가류방법Vulcanization Method of Pneumatic Tire

본 발명은 공기타이어의 가류방법에 관한 것으로, 특히 타이어의 가류시간을 단축하여 생산성을 향상시키도록 된 공기타이어의 가류방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vulcanization method of a pneumatic tire, and more particularly, to a vulcanization method of a pneumatic tire designed to shorten the vulcanization time of a tire to improve productivity.

일반적으로, 타이어는 여러 가지 고무 및 약품을 첨가하여 혼합한 배합고무를 압연 또는 압출한 반제품을 조합하는 성형공정을 거치면 그린케이스(green case)라는 생타이어가 되고, 이 그린케이스를 가류기에 넣고 소정의 온도와 압력으로 일정시간 가류하게 되면 배합고무가 화학적으로 결합되어 타이어에 필요한 조건들을 충족시키는 타이어로 완성된다.In general, a tire becomes a green tire called a green case through a molding process that combines a rolled or extruded semi-finished product of a compound rubber mixed with various rubbers and chemicals, and puts the green case in a vulcanizer. When it is vulcanized for a certain period of time at the temperature and pressure, the compounded rubber is chemically combined to form a tire that meets the tire requirements.

여기서, 상기 그린케이스를 가류하기 위해서는 내측과 외측의 양측에서 증기나 온수 등으로 열 및 압력이 공급되는데 내측의 열 및 압력이 타이어에 직접 닿지 않도록 블레이더(bladder)라는 고무주머니를 사용하며 내측 압력에 의해 몰드(mold)가 열리지 않도록 몰드 외부로 부터 내측에 작용하는 압력보다 큰 압력이 작용하는 가류기를 자동가류기라 칭한다.Here, in order to vulcanize the green case, heat and pressure are supplied by steam or hot water from both sides of the inner side and the outer side, and a rubber bag called a bladder is used to prevent the inner side heat and pressure from directly contacting the tire. In order to prevent the mold from being opened, a vulcanizer in which a pressure greater than the pressure acting on the inside from the outside of the mold acts is called an automatic vulcanizer.

이에 반해, 타이어가 매우 크거나 생산량이 소량인 경우에는 그린케이스의 내부에 튜브와 유사한 형태의 큐어링백(curing bag)을 삽입한 후 몰드에 장착하여 상하측의 몰드를 볼트와 너트로 고정한 후 돔쳄버(dome chamber)또는 오토클레이브(autoclave)에 넣은 후 큐어링백에 있는 밸브에 열 및 압력원을 연결시킨 후 쳄버의 뚜껑을 고정시킨 뒤 큐어링백과 연결된 파이프로 증기나 뜨거운 물을 주입시키고 쳄버내에 증기를 유입시켜 가류하는 수동가류가 있는데, 이 수동가류에서는 큐어링백이 삽입된 그린케이스를 몰드에 장착한 후, 이 몰드외곽을 볼트와 너트로 조여주기 때문에 큐어링백 내부에 공기를 유입시켜도 공기 압력에 의해 몰드가 열리지는 않게 되며 공기에 의해 큐어링백이 일정형태를 유지하게 되고 이 큐어링백이 그린케이스 내부에서 일정형태로 그린케이스가 가류될 수 있게 된다.On the other hand, if the tire is very large or the output is small, insert a curing bag similar to a tube inside the green case and mount it on the mold to fix the upper and lower molds with bolts and nuts. Put it in the chamber or autoclave, connect heat and pressure source to the valve in the curing bag, fix the chamber lid, inject steam or hot water into the pipe connected to the curing bag, and There is a manual vulcanization in which steam flows in and vulcanizes. In this manual vulcanization, a green case with a curing bag is mounted on a mold, and then the outside of the mold is tightened with bolts and nuts. The mold does not open by the air, and the curing bag is maintained by air, and the curing bag is fixed inside the green case. Green becomes the case may be vulcanized with.

그러나, 종래의 방법으로는 그린케이스를 가류하기 전에 큐어링백내부에 공기가 주입되므로 그린케이스의 가류시 일정온도에 도달하는 시간이 오래걸리게 되어, 생산성이 떨어지는 문제점이 있었다.However, in the conventional method, since air is injected into the curing bag before the green case is vulcanized, it takes a long time to reach a predetermined temperature when the green case is vulcanized, which causes a problem of low productivity.

이에 본 발명은 상기와 같은 문제점을 해결하기 위해 안출된 것으로, 가류전의 그린케이스내의 큐어링백의 밸브에 증기가 유입되도록 하여 일정시간이 경과함으로써 예열된 그린케이스를 가류하도록 됨에따라 가류시간을 단축하도록 된 공기타이어의 가류방법을 제공하는데 그 목적이 있다.Accordingly, the present invention has been made to solve the above problems, to reduce the vulcanization time as the steam is introduced into the valve of the curing bag in the green case before vulcanization to vulcanize the preheated green case by a certain time. It is an object of the present invention to provide a method for vulcanizing a pneumatic tire.

도 1 은 본 발명에 따른 돔쳄버에서 타이어 가류시의 단면도,1 is a cross-sectional view of the tire vulcanization in the dome chamber according to the present invention,

도 2 는 본 발명의 요지인 그린케이스의 예열단면도이다.Figure 2 is a pre-sectional view of the green case which is the subject of the present invention.

1 : 몰드 2 : 그린케이스1: Mold 2: Green Case

3: 큐어링백 4 : 밸브3: curing bag 4: valve

5 : 볼트 6 : 너트5: bolt 6: nut

7 : 외측증기파이프 8 : 내측증기파이프7: outside steam pipe 8: inside steam pipe

9 : 돔쳄버9: dome chamber

상기와 같은 목적을 달성하기 위한 본 발명은, 큐어링백의 밸브와 증기파이프의 라인이 연결되고, 이 라인을 통해 고온의 증기가 큐어링백의 내부로 유입되어 그린케이스가 일정온도로 예열된 후 가류공정이 이루어지도록 구성된다.According to the present invention for achieving the above object, the valve of the curing bag and the line of the steam pipe is connected, through which the hot steam flows into the inside of the curing bag and the green case is preheated to a certain temperature The process is configured to take place.

이하 본 발명을 첨부된 예시도면을 참조로 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도 1 은 그린케이스의 예열단면도이고 도 2 는 돔쳄버에서 타이어 가류시의 단면도로서, 본 발명은 큐어링백(3)이 삽입된 그린케이스(2)를 몰드(1)에 장착시키는 단계, 상기 몰드(1)를 통과하여 큐어링백(3)에 연결된 내측증기파이프(8)를 통해 고온의 증기를 유입시키는 단계, 상기 몰드(1)에 장착된 그린케이스(2)를 가류시키는 단계로 이루어 진다.1 is a cross-sectional view of the preheating of the green case and Figure 2 is a cross-sectional view of the tire vulcanization in the dome chamber, the present invention comprises the step of mounting the green case 2 in which the curing bag 3 is inserted into the mold 1, the mold Passing the hot steam through the inner steam pipe (8) connected to the curing bag (3) through the (1), and the green case (2) mounted on the mold (1) is made.

이에 따라, 돔쳄버(9)내에 설치된 몰드(1) 및 큐어링백(3)과 밸브(4)를 매개로 연결된 내측증기파이프(8)를 통해 증기가 유입되고 상기 몰드(1)는 볼트(5)와 너트(6)를 매개로 조여지면서 그린케이스(2)의 내부가 예열됨과 동시에 외측증기파이프(7)에서 고온의 증기가 유입되어 가류공정이 이루어지게 되는데, 여기서 상기 내측증기파이프(8)로 유입되는 증기의 압력이 높으면 큐어링백(3)의 온도상승이 빨라지게 되어 그린케이스(2)의 온도도 높게 되지만 두꺼운 그린케이스(2)에서는 그린케이스(2) 내측의 온도가 크게 상승하는데 반해 가류가 가장 늦은 그린케이스(2)의 내부는 온도가 서서히 상승하므로 적정압력을 유지하여야만 한다.Accordingly, steam is introduced through the inner steam pipe 8 connected through the mold 1 and the curing bag 3 and the valve 4 installed in the dome chamber 9, and the mold 1 is bolted to a bolt 5. ) And the nut 6 are preheated while the inside of the green case 2 is preheated, and at the same time a high temperature steam is introduced from the outer steam pipe 7 so that a vulcanization process is performed, wherein the inner steam pipe 8 is provided. The higher the pressure of the steam flowing into the curing bag 3, the faster the temperature rise of the green case 2, but in the thick green case 2, the temperature inside the green case 2 increases significantly. The inside of the green case 2, which has the slowest vulcanization, has to maintain a proper pressure because the temperature gradually rises.

본 발명에 따른 실험에 의하면 그린케이스(2)의 카카스 온도가 80℃ 를 초과하면 카카스의 코드와 고무층간 박리가 일어나 타이어의 품질을 저하시킨다.According to the experiment according to the present invention, when the carcass temperature of the green case 2 exceeds 80 ° C, peeling occurs between the cord of the carcass and the rubber layer, thereby reducing the tire quality.

따라서, 예열 증기의 압력은 큐어링백(3)의 두께에 따라 달라지지만 대체로 1~5 ㎏/㎠ 정도가 적당하며 타이어의 품질측면에서는 1~2 ㎏/㎠ 정도의 낮은 압력으로 예열하는 것이 좋으며, 예열시간도 큐어링백(3)과 타이어의 두께에 따라 달라지지만 1~2 ㎏/㎠ 정도의 낮은 압력에서는 최저 20분에서 최고 1시간 정도가 카카스 온도가 크게 상승하지 않으면서 그린케이스 내부온도를 상승시킬 수 있기 때문에 적당하다.Therefore, the pressure of the preheated steam varies depending on the thickness of the curing bag 3, but generally 1 to 5 kg / cm 2 is appropriate, and in terms of tire quality, it is preferable to preheat to a low pressure of 1 to 2 kg / cm 2. The preheating time also depends on the curing bag (3) and the thickness of the tire, but at a low pressure of 1 to 2 kg / ㎠, the temperature inside the green case can be reduced from 20 minutes to 1 hour without increasing the carcass temperature significantly. It is suitable because it can raise.

이에 따라, 그린케이스(2)의 가류반응이 촉진되어 전체적으로 가류공정이 단축된다.As a result, the vulcanization reaction of the green case 2 is promoted, thereby shortening the vulcanization process as a whole.

이상 설명한 바와 같이 본 발명에 따르면, 큐어링백이 삽입된 그린케이스를 몰드내부에 장착하고, 상기 큐어링백에 고온의 증기가 파이프를 통해 유입되도록 하여, 상기 그린케이스의 내부를 예열시킬 수 있게 됨에 따라 그린케이스의 가류공정이 단축되어 생산성이 향상되는 효과가 있다.As described above, according to the present invention, the green case into which the curing bag is inserted is mounted in the mold, and the hot steam is introduced into the curing bag through a pipe, thereby preheating the inside of the green case. The vulcanization process of the green case is shortened, thereby improving productivity.

Claims (1)

큐어링백(3)이 삽입된 그린케이스(2)를 몰드(1)에 장착시키는 단계, 상기 몰드(1)를 통과하여 큐어링백(3)에 연결된 내측증기파이프(8)를 통해 고온의 증기를 유입시키는 단계, 상기 몰드(1)에 장착된 그린케이스(2)를 가류시키는 단계로 이루어지는 공기타이어의 가류방법.Mounting the green case (2) in which the curing bag (3) is inserted into the mold (1), the hot steam is passed through the inner steam pipe (8) connected to the curing bag (3) through the mold (1) A method of vulcanizing a pneumatic tire comprising the step of introducing, and vulcanizing the green case (2) mounted on the mold (1).
KR1019970031436A 1997-07-08 1997-07-08 Pneumatic tyre vulcanization method KR100200412B1 (en)

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Application Number Priority Date Filing Date Title
KR1019970031436A KR100200412B1 (en) 1997-07-08 1997-07-08 Pneumatic tyre vulcanization method

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KR100200412B1 true KR100200412B1 (en) 1999-06-15

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