KR20120063786A - Bladder of shaping drum for tire truck and bus radial tire - Google Patents

Bladder of shaping drum for tire truck and bus radial tire Download PDF

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Publication number
KR20120063786A
KR20120063786A KR1020100124916A KR20100124916A KR20120063786A KR 20120063786 A KR20120063786 A KR 20120063786A KR 1020100124916 A KR1020100124916 A KR 1020100124916A KR 20100124916 A KR20100124916 A KR 20100124916A KR 20120063786 A KR20120063786 A KR 20120063786A
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KR
South Korea
Prior art keywords
bladder
green tire
tire
push
shaping drum
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KR1020100124916A
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Korean (ko)
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KR101306962B1 (en
Inventor
손관호
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한국타이어 주식회사
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    • 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
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/08—Building tyres
    • B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
    • B29D30/24—Drums
    • B29D30/244—Drums for manufacturing substantially cylindrical tyre components with cores or beads, e.g. carcasses
    • 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
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/08—Building tyres
    • B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
    • B29D30/24—Drums
    • B29D30/26—Accessories or details, e.g. membranes, transfer rings
    • B29D2030/2628—Bladders for shaping the inner parts of the tyre beads or sidewalls
    • 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
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/08—Building tyres
    • B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
    • B29D30/24—Drums
    • B29D30/26—Accessories or details, e.g. membranes, transfer rings
    • B29D2030/2635—Central bladder, e.g. elastic membrane, sleeve, envelope, diaphragm, which covers the central portion of the drum, e.g. covering the toroidally expandable rigid segments

Abstract

PURPOSE: A bladder of a shaping drum for a heavy-load green tire is provided to prevent the unevenness on the shape of the green tire or the bending of a bead unit by supporting the inside of a first of the green tire using the bladder. CONSTITUTION: A bladder of a shaping drum for a heavy-load green tire supports in the inside of a bead unit(2) and a center unit(3) of a first case(1) of the green tire when shaping the first case. The bladder includes a dual bladder unit(6) including a supporter bladder(4) supporting the inside of the bead unit, and a push bladder(5) supporting the inside of the center unit and the supporter bladder. The push bladder pushes the supporter bladder. The contact surface of the supporter bladder and the push bladder is formed into an uneven surface for forming air passages.

Description

중하중 그린타이어용 쉐이핑 드럼의 블라더{Bladder of shaping drum for tire truck and bus radial tire}Blader of shaping drum for tire truck and bus radial tire}

본 발명은 중하중 그린타이어 성형시 비드부와 센터부를 동시에 지지하여 비드부의 꺾임 현상을 최소화하여 궁극적으로 타이어의 내구성능의 향상을 도모하는 중하중 그린타이어용 쉐이핑 드럼(Shaping drum)의 블라더에 관한 것이다.The present invention is to support the bead portion and the center portion at the time of forming a heavy load green tire to minimize the bending of the bead portion ultimately to improve the durability of the tire to the shading drum (Shaping drum) for heavy load green tire It is about.

일반적으로 중하중용 타이어를 성형 제조할 때 쉐이핑 드럼에서 카카스(Carcass)와 인너라이너(Inner Liner), 체퍼(Chafer), 비드(Bead) 및, 사이드월(Sidewall) 등의 반제품으로 결합된 1차 케이스를 1 ~ 1.5bar 정도의 공기압으로 쉐이핑(Shaping)하여 트레드(Tread)와 벨트(Belt)의 반제품으로 구성된 2차 케이스를 결합하여 그린타이어를 완성하게 된다.In general, when molding heavy-tire tires, the primary parts are combined with semi-finished products such as carcass, inner liner, chafer, bead, and sidewall in a shaping drum. Shaping the case with air pressure of 1 ~ 1.5bar to combine the secondary case consisting of semi-finished products of the tread and belt (Belt) to complete the green tire.

그러나 종래 쉐이핑 작업시 다음과 같은 문제점이 제기되어 왔다.However, the following problems have been raised in the conventional shaping operation.

세이핑 드럼에서 1차 케이스의 비드부 내부를 측면에서 지지하는 보조기구가 없어서 이 1차 케이스를 쉐이핑 과정시 반제품으로 보강이 많이 되어 있는 비드부와 상대적으로 반제품이 적은 센터부의 성장량 차이를 유발해 적정 그린타이어의 프로파일(Profile) 형성에 불리한 영향을 끼치며, 이러한 1차 케이스의 비드부와 센터부 사이의 성장량 차이는 응력이 집중되는 부분을 유발하여 비드부의 꺾임 등의 내구성능 저하를 야기할 수 있는 심각한 문제점이 있었으며, 이는 그린타이어의 형상 불량을 유발하여 완제품 타이어 완성시 상기 비드부의 응력집중으로 꺾임 부분에서 박리가 야기되어 타이어의 내구성 저하를 초래하는 문제점을 가지고 있었다.In the shaping drum, there is no auxiliary device that supports the inside of the bead part of the primary case from the side, and this shaping process causes a difference in growth between the bead part which is reinforced with semi-finished product and the center part with relatively less semi-finished product during shaping process. This adversely affects the profile formation of the appropriate green tires, and the difference in growth amount between the bead portion and the center portion of the primary case may cause stress concentration and cause durability degradation such as bending of the bead portion. There was a serious problem, which caused a poor shape of the green tire to cause the peeling at the bent portion due to the stress concentration of the bead portion when the finished tire was completed, which had a problem of reducing the durability of the tire.

이에 본 발명은 상기와 같은 종래 문제점을 감안하여 발명된 것으로, 그린타이어의 1차 케이스 내부를 공기압을 이용한 2가지 블라더를 지지하여 비드부의 꺾임이나 그린타이어 형상의 불균일을 예방하여 완제품 타이어의 박리현상 방지와 내구 성능향상이 이루어지는 중하중 그린타이어용 쉐이핑 드럼의 블라더를 제공함에 그 목적이 있다.Therefore, the present invention was invented in view of the above-described conventional problems, and supports two bladders using air pressure inside the primary case of the green tire to prevent bending of the bead portion and unevenness of the green tire shape, thereby peeling off the finished tire. It is an object of the present invention to provide a bladder of a shaping drum for a heavy-load green tire in which development prevention and durability improvement are achieved.

상기와 같은 목적을 달성하기 위한 본 발명은 그린타이어의 1차 케이스 쉐이핑 성형시 이 1차 케이스의 비드부와 센터부 내부를 지지해주는 중하중 그린타이어용 쉐이핑 드럼의 블라더에 있어서, 상기 비드부의 내부를 지지하는 지지 블라더와 이 지지 블라더를 지지하면서 센터부의 내부를 지지하는 푸쉬 블라더의 이중 블라더로 이루어지되, 상기 푸쉬 블라더가 지지 블라더를 밀어주면서 비드부와 센터부 내부를 보유 지지하도록 되어 있다.The present invention for achieving the above object is in the bladder of the heavy-duty green tire shaping drum for supporting the inside of the bead portion and the center portion of the primary case during shaping molding of the green tire, the bead portion It consists of a support bladder supporting the inside and a double bladder of the push bladder supporting the inside of the center portion while supporting the support bladder, wherein the push bladder pushes the support bladder to open the inside of the bead portion and the center portion. It is supposed to be held.

이와 같은 본 발명에 따른 중하중 그린타이어용 쉐이핑 드럼의 블라더는 쉐이핑 성형시 지지 블라더와 푸쉬 블라더로 이루어진 이중 블라더의 팽창으로 그린타이어용 1차 케이스의 비드부와 센터부 내부를 동시에 지지해주어 타이어의 적정 내부 프로파일을 갖도록 유지하여 균일한 품질을 확보할 수 있으며, 비드부의 꺾임을 최소화하여 궁극적으로 타이어 내구성 향상에 기여할 수 있는 잇점을 갖는다.The bladder of the heavy-duty green tire shaping drum according to the present invention simultaneously expands the inside of the bead and the center of the primary case for the green tire by the expansion of the double bladder composed of the support bladder and the push bladder during shaping molding. By supporting it, it is possible to maintain a proper internal profile of the tire to ensure uniform quality, and to minimize the bending of the bead has the advantage that can ultimately contribute to improving tire durability.

도 1은 본 발명에 따른 중하중 그린타이어용 쉐이핑 드럼에서 블라더가 수축시 상태를 보여주는 도면,
도 2는 도 1에서 블라더가 팽창시 상태를 보여주는 도면,
도 3은 본 발명의 요부인 블라더 접촉부 표면의 부분 확대 단면도이다.1 is a view showing a state when the bladder shrinks in the shaping drum for a heavy-load green tire according to the present invention,
Figure 2 is a view showing a state when the bladder inflated in Figure 1,
3 is a partially enlarged cross-sectional view of a bladder contact surface which is a main part of the present invention.

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

도 1과 도 2는 본 발명에 따른 이중 블라더가 적용된 중하중 그린타이어용 쉐이핑 드럼의 단면도로서, 도 1은 블라더 수축시 상태의 도면이고, 도 2는 블라더 팽창시 상태의 도면을 보여주고 있다.1 and 2 are cross-sectional views of a shaping drum for a heavy-load green tire to which a double bladder is applied according to the present invention, FIG. 1 is a view of a bladder contraction state, and FIG. 2 is a view of a bladder expansion state. Giving.

본 발명은 그린타이어의 1차 케이스(1) 쉐이핑 성형시 이 1차 케이스(1)의 비드부(2)와 센터부(3) 내부를 지지해 주는 중하중 그린타이어용 쉐이핑 드럼의 블라더에 있어서, 상기 비드부(2)의 내부를 지지하는 지지 블라더(4)와 이 지지 블라더(4)를 지지하면서 센터부(3)의 내부를 지지하는 푸쉬 블라더(5)의 이중 블라더(6)로 이루어지되, 상기 푸쉬 블라더(5)가 지지 블라더(4)를 밀어주면서 비드부(2)와 센터부(3) 내부를 보유 지지하도록 이루어져 있다.The present invention relates to a bladder of a heavy-duty green tire shaping drum that supports the inside of the bead part 2 and the center part 3 of the primary case 1 when shaping the primary case 1 of the green tire. The double bladder of the support bladder 4 which supports the inside of the said bead part 2, and the push bladder 5 which supports the inside of the center part 3 while supporting this support bladder 4, It consists of (6), the push bladder (5) is made to hold the inside of the bead portion (2) and the center portion (3) while pushing the support bladder (4).

그리고 상기 지지 블라더(4)와 푸쉬 블라더(5)의 접촉부 표면은 도 3과 같이 에어통로를 형성할 수 있도록 요철요홈(7)으로 형성되어 있다.And the surface of the contact portion of the support bladder 4 and the push bladder 5 is formed with a concave-convex groove 7 to form an air passage as shown in FIG.

즉, 본 발명에 따른 이중 블라더(6)는 지지 블라더(4)와 푸쉬 블라더(5)로 이루어져 있는데, 상기 지지 블라더(4)를 확실하게 지지할 수 있게 되어 있다.That is, the double bladder 6 according to the present invention is composed of the support bladder 4 and the push bladder 5, so that the support bladder 4 can be reliably supported.

한편, 도 1과 같이 1차 케이스(1)가 쉐이핑 드럼(100) 상에 위치하게 되면, 먼저, 지지 블라더(4)가 이들의 에어배관(8a)을 통해 1 ~ 2bar 정도로 공급된 에어를 통해 도 2와 같이 비드부(2)를 밀어주게 된다.On the other hand, when the primary case 1 is located on the shaping drum 100 as shown in Figure 1, first, the support bladder 4 is supplied to the air supplied to about 1 ~ 2bar through their air pipe (8a) Push through the bead part 2 as shown in FIG.

이어 상기 지지 블라더(4)가 비드부(2) 쪽을 어느 정도 지지해 주기 시작하면 1 ~ 3bar 정도의 에어가 공급되는 푸쉬 블라더(5) 역시 순차적으로 이 지지 블라더(4)와 1차 케이스(1)의 센터부(3)를 고루 밀어주어 적정한 프로파일을 가진 그린타이어의 1차 케이스를 완성하게 된다.Subsequently, when the support bladder 4 starts supporting the bead part 2 to some extent, the push bladder 5 to which air of about 1 to 3 bar is supplied is also sequentially supported by the support bladder 4 and 1. The center portion 3 of the car case 1 is evenly pushed to complete the primary case of the green tire having an appropriate profile.

한편, 도 2에 도시된 바와 같이 상기 지지 블라더(4)와 푸쉬 블라더(5)가 완전히 팽창되었을 때 이들 이중 블라더(6)의 지지 블라더(4)와 푸쉬 블라더(5) 경계로 빈 공간이 생기게 되는데, 이 부분은 별도의 에어 공급관(8b)을 통해 공급된 공기압을 채워 1차 케이스(1) 내부의 불균일 팽창방지와 적정 내구 프로파일을 형성시킨다. On the other hand, when the support bladder 4 and the push bladder 5 are fully inflated, as shown in FIG. 2, the support bladder 4 and the push bladder 5 boundary of these double bladders 6 are shown. A furnace space is created, which fills the air pressure supplied through a separate air supply pipe 8b to form a non-uniform expansion prevention and proper endurance profile inside the primary case 1.

여기서 별도의 에어 공급관(8b)에서 공급되는 공기압은 도 3의 지지 블라더(4)와 푸쉬 블라더(5)의 접촉면들 사이에 형성된 요철요홈(7)을 통하여 공급된다.Here, the air pressure supplied from the separate air supply pipe 8b is supplied through the uneven groove 7 formed between the contact surfaces of the support bladder 4 and the push bladder 5 of FIG. 3.

상기와 같이 본 발명에 따른 중하중 그린타이어용 쉐이핑 드럼의 블라더는 지지 블라더(4)와 푸쉬 블라더(5)로 이루어진 이중 블라더(6)를 이용한 지지방식으로 되어 있어 그린타이어용 1차 케이스(1)의 비드부(2) 꺾임 방지와 적정 프로파일을 형성하도록 도와주게 되어 내구성능과 품질 균일화에 도움을 주는 그린타이어를 성형할 수 있도록 되어 있다.As described above, the bladder of the heavy-duty green tire shaping drum according to the present invention has a support method using a double bladder 6 made of a support bladder 4 and a push bladder 5 for green tires. Helping to prevent the bend portion 2 of the car case 1 and to form an appropriate profile to form a green tire that helps in durability and quality uniformity.

1 : 1차 케이스, 2 : 비드부,
3 : 센터부, 4 : 지지 블라더(Support bladder),
5 : 푸쉬 블라더(Push bladder), 6 : 이중 블라더,
7 : 요철요홈, 8a,8b : 에어배관.1: primary case, 2: bead part,
3: center portion, 4: support bladder,
5: push bladder, 6: double bladder,
7: uneven groove, 8a, 8b: air piping.

Claims (2)

그린타이어의 1차 케이스(1) 쉐이핑 성형시 이 1차 케이스(1)의 비드부(2)와 센터부(3) 내부를 지지해 주는 중하중 그린타이어용 쉐이핑 드럼의 블라더에 있어서,
상기 비드부(2)의 내부를 지지하는 지지 블라더(4)와 이 지지 블라더(4)를 지지하면서 센터부(3)의 내부를 지지하는 푸쉬 블라더(5)의 이중 블라더(6)로 이루어지되, 상기 푸쉬 블라더(5)가 지지 블라더(4)를 밀어주면서 비드부(2)와 센터부(3) 내부를 보유 지지하도록 이루어진 것을 특징으로 하는 중하중 그린타이어용 쉐이핑 드럼의 블라더.In the bladder of the heavy-duty green tire shaping drum which supports the inside of the bead part 2 and the center part 3 of this primary case 1 during shaping molding of the green tire primary case 1,
Double bladder 6 of the support bladder 4 supporting the inside of the bead part 2 and the push bladder 5 supporting the inside of the center part 3 while supporting the support bladder 4. Shaping drum for heavy-load green tire, characterized in that the push bladder (5) is made to hold the inside of the bead portion (2) and the center portion (3) while pushing the support bladder (4) Bladder. 제 1항에 있어서,
상기 지지 블라더(4)와 푸쉬 블라더(5)의 접촉부 표면은 에어통로를 형성할 수 있도록 요철요홈(7)으로 형성된 것을 특징으로 하는 중하중 그린타이어용 쉐이핑 드럼의 블라더.
The method of claim 1,
The bladder of the shaping drum for the heavy-loaded green tire, characterized in that the surface of the contact portion of the support bladder (4) and the push bladder (5) is formed with an uneven groove (7) to form an air passage.
KR1020100124916A 2010-12-08 2010-12-08 Bladder of shaping drum for tire truck and bus radial tire KR101306962B1 (en)

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KR1020100124916A KR101306962B1 (en) 2010-12-08 2010-12-08 Bladder of shaping drum for tire truck and bus radial tire

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104589681A (en) * 2013-11-01 2015-05-06 福建建阳龙翔科技开发有限公司 Capsule chuck type assembly drum
CN109719981A (en) * 2019-01-16 2019-05-07 宁夏神州轮胎有限公司 A kind of tyre bead locking device when tire building

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100329702B1 (en) * 1999-12-06 2002-03-21 신형인 The single stage drum device and method for building tire
KR200377633Y1 (en) * 2004-12-22 2005-03-14 금호타이어 주식회사 Air venting groove of cure bladder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104589681A (en) * 2013-11-01 2015-05-06 福建建阳龙翔科技开发有限公司 Capsule chuck type assembly drum
CN109719981A (en) * 2019-01-16 2019-05-07 宁夏神州轮胎有限公司 A kind of tyre bead locking device when tire building

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