JPS63312826A - Metal mold for spike tire - Google Patents

Metal mold for spike tire

Info

Publication number
JPS63312826A
JPS63312826A JP62149157A JP14915787A JPS63312826A JP S63312826 A JPS63312826 A JP S63312826A JP 62149157 A JP62149157 A JP 62149157A JP 14915787 A JP14915787 A JP 14915787A JP S63312826 A JPS63312826 A JP S63312826A
Authority
JP
Japan
Prior art keywords
tire
mold
protrusion
forming
block
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP62149157A
Other languages
Japanese (ja)
Inventor
Michihiro Sugata
姿　通博
Susumu Watanabe
晋 渡辺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yokohama Rubber Co Ltd
Original Assignee
Yokohama Rubber Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yokohama Rubber Co Ltd filed Critical Yokohama Rubber Co Ltd
Priority to JP62149157A priority Critical patent/JPS63312826A/en
Publication of JPS63312826A publication Critical patent/JPS63312826A/en
Pending legal-status Critical Current

Links

Classifications

    • 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)
    • B29D30/52—Unvulcanised treads, e.g. on used tyres; Retreading
    • B29D30/66—Moulding treads on to tyre casings, e.g. non-skid treads with spikes
    • 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)
    • B29D30/52—Unvulcanised treads, e.g. on used tyres; Retreading
    • B29D30/66—Moulding treads on to tyre casings, e.g. non-skid treads with spikes
    • B29D2030/662—Treads with antiskid properties, i.e. with spikes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tyre Moulding (AREA)
  • Tires In General (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

PURPOSE:To prevent a tire block from, cracking by forming a kerf at a specific position of a spike tire. CONSTITUTION:A kerf molding protrusion 2 is formed near a spike pin burying hole forming protrusion 4 in a metal mold 1 for molding a spike tire. The protrusion 2 is formed to reduce the deformation of a tire block 3 due to the protrusion 4 and to release the tire from the mold 1 with a small deformation. The block 3 is prevented from cracking.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、スパイクタイヤ用金型に係わり、さらに詳し
くは、タイヤ成形時のスパイクビン穴周辺にひび割れ（
クランク）の発生することがない二つ割型のスパイクタ
イヤ用金型に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mold for a spiked tire, and more specifically, the present invention relates to a mold for a spiked tire.
This invention relates to a two-part spiked tire mold that does not cause cranking.

〔従来の技術） 従来、スパイクタイヤ用金型には、タイヤのブロックに
スパイクピンを打ち込むための穴形成用の突起を設けた
、金型の中心で二つ割にできる構造、すなわち二つ割型
のものが広く使用されている。このような二つ割型構造
のスパイクタイヤ用金型を使用してタイヤを成形する場
合、タイヤブロック、特にタイヤセンタ一部分のブロッ
クのスパイクピンの打ち込み用穴（以下、スパイクピン
穴と略す）周辺にひび割れまたはクラック（以下ひび割
れという）が生じ易いという問題があった。たとえば、
第２図（イ）、（ロ）および（ハ）はそれぞれ従来の二
つ割型スパイクタイヤ用金型のブロック部分の平面図、
第２図（イ）のＡ−Ａ線における断面図およびタイヤ離
型時のタイヤブロックの変形状態を示す模式断面図であ
り、このような従来の金型の場合、第２図（ハ）に示す
ように、成形後金型１をタイヤブロック３から取り外そ
うとすると、該金型１の前記スパイクピン穴形成用突起
４によって、ブロック３が強く変形せしめられて、ひび
割れが発生する。そして、このひび割れは、タイヤのシ
ョルダ一部分に比べて、該スパイクビン穴形成用突起４
によって強い変形を受は易いセンタ一部分に多く発生す
るが、このひび割れの発生を防止しようとすると、スパ
イクタイヤのブロックの形状やスパイクピン穴の位置、
場合によってはタイヤのゴム配合組成等が制約を受ける
のを免れ得なくなり、スパイクタイヤの工業的製造上、
甚だ不利であった。[Prior art] Conventionally, a mold for a spiked tire has a structure that can be split into two at the center of the mold, which has a protrusion for forming a hole for driving a spike pin into a tire block. type is widely used. When molding a tire using such a spiked tire mold with a split type structure, the area around the hole for driving the spike pin (hereinafter abbreviated as the spike pin hole) in the tire block, especially the block that is part of the tire center. There was a problem in that cracks or cracks (hereinafter referred to as cracks) were likely to occur. for example,
Figures 2 (a), (b), and (c) are respectively plan views of the block portion of a conventional two-split type spike tire mold;
FIG. 2(a) is a cross-sectional view taken along the line A-A in FIG. As shown, when the mold 1 is removed from the tire block 3 after molding, the block 3 is strongly deformed by the spike pin hole forming projections 4 of the mold 1, causing cracks to occur. This crack is larger than the shoulder part of the tire when the spike bottle hole forming protrusion 4 is formed.
Cracks often occur in the center part of the tire, which is easily subject to strong deformation due to spikes, but in order to prevent this crack from occurring, it is necessary to change the shape of the block of the spiked tire, the position of the spike pin hole,
In some cases, it becomes impossible to avoid restrictions on the rubber compounding composition of tires, and in the industrial production of spiked tires,
It was extremely disadvantageous.

〔発明の目的〕[Purpose of the invention]

本発明の目的は、上記二つ割型のスパイクタイヤ用金型
（以下、単にスパイクタイヤ用金型という）を用いて成
形したタイヤを離型する場合に、タイヤブロックのスパ
イクビン穴の近傍におけるひび割れの発生することのな
いスパイクタイヤ用金型を提供するにある。It is an object of the present invention to provide a solution to the problem that occurs in the vicinity of the spike bottle hole of a tire block when releasing a tire molded using the above-mentioned two-split type spike tire mold (hereinafter simply referred to as a spike tire mold). To provide a mold for a spiked tire that does not cause cracks.

〔発明の構成〕[Structure of the invention]

このような本発明の目的は、前記スパイクピン穴形成用
突起に近接して、該スパイクピン穴形成用突起の金型の
二つ割位置側にカーフ形成用突起を設けることによって
達成することができる。Such an object of the present invention can be achieved by providing a kerf forming protrusion close to the spike pin hole forming protrusion on the side of the spike pin hole forming protrusion on the side where the mold is split in half. can.

以下、図面に基づき本発明の詳細な説明する。Hereinafter, the present invention will be explained in detail based on the drawings.

第１図（イ）、（ロ）および（ハ）は、それぞれ、本発
明のスパイクタイヤ用金型のブロック部分の平面図、第
１図（イ）のＡ−Ａ”線における断面図およびタイヤ離
型時のタイヤブロックの変形状態を示す模式断面図であ
る。図に示す通り、本発明の金型１は、タイヤブロック
３内部にスパイクビン穴を形成するための突起４に近接
して、このスパイクピン穴形成用突起４の金型の二つ割
位置（すなわち第３図のＸ−Ｘ線で示す位置）側にカー
フ形成用突起２を設けたものである。本発明の金型１の
タイヤ離型時のタイヤブロックの変形状態を示す第１図
（ハ）と従来の金型のそれを示す第２図（ハ）とを対比
すると明らかなように、本発明のような特定位置にカー
フ形成用突起２を有する金型を使用した場合は、このよ
うなカーフ形成用突起２を有していない従来の金型に比
べて、スパイクピン穴形成用突起４によるタイヤブロッ
ク３の変形量を小さくし、かつ小さい変形でタイヤ（ブ
ロック）から金型を離型させることができる。したがっ
て、該スパイクピン穴形成用突起４によってタイヤブロ
ック３にひび割れ（クラック）を生じさせることなく、
容易に離型することができる。Figures 1 (a), (b), and (c) are a plan view of a block portion of a mold for a spiked tire of the present invention, a sectional view taken along the line A-A'' in Figure 1 (a), and a tire 1 is a schematic cross-sectional view showing a deformed state of a tire block at the time of mold release.As shown in the figure, the mold 1 of the present invention has a protrusion 4 for forming a spike bin hole inside the tire block 3; A kerf forming protrusion 2 is provided on the side of the spike pin hole forming protrusion 4 at the halved position of the mold (that is, the position indicated by the line X-X in FIG. 3).Mold 1 of the present invention. As is clear from the comparison between FIG. 1 (c) showing the deformed state of the tire block when the tire is released from the tire mold and FIG. 2 (c) showing that of the conventional mold, When a mold having a protrusion 2 for forming a kerf is used, the deformation of the tire block 3 due to the protrusion 4 for forming a spike pin hole is reduced compared to a conventional mold not having such a protrusion 2 for forming a kerf. The mold can be released from the tire (block) with a small amount and with small deformation.Therefore, the spike pin hole forming projections 4 do not cause cracks in the tire block 3.
Can be easily released from the mold.

第３図は本発明の１態様になる金型によって得られたタ
イヤのブロックパターンを示す平面図あり、図において
２°はカーフ、４′はスパイクピンの埋め込み穴を示す
。FIG. 3 is a plan view showing a block pattern of a tire obtained by a mold according to one embodiment of the present invention, in which 2° indicates a kerf and 4' indicates a hole for embedding a spike pin.

この図から本発明の金型に規定するカーフ形成用突起２
の位置関係を具体的に理解することができる。すなわち
本発明の金型に設けるカーフ形成用突起２は、スパイク
ピン穴形成用突起４の金型側位置Ｘ−Ｘ線側であって、
該突起の長さ方向をタイヤ周方向に沿わせて設けられ、
かつタイヤのセンタ一部分に設ける必要がある。From this figure, the kerf forming protrusion 2 specified in the mold of the present invention
You can concretely understand the positional relationship between the two. That is, the kerf forming projection 2 provided in the mold of the present invention is located on the mold side position X-X line side of the spike pin hole forming projection 4,
The length direction of the protrusion is provided along the tire circumferential direction,
It is also necessary to provide it in a part of the center of the tire.

このような本発明になる金型において、カーフ形成用突
起２の形状は、種々の形状をとることができるが、通常
は板状の形状をとり、タイヤ周方向に沿って配置される
。しかしながら、本発明の金型によって作成されたタイ
ヤから金型を離型する場合に、タイヤのブロックのひび
割れを有効に防止するためには、該カーフ形成用突起２
の寸法およびその位置関係を示す第４図（イ）および（
ロ）の関係を満足する、すな　−わち、該カーフ形成用
突起２の投影長さ７！（後述するようにカーフ形成用突
起は種々の形状をとるため、投影長さとする）を少なく
も５ｍ１１１以上、その最大高さｄをスパイクピン穴形
成用突起の高さの３０％以下とし、また、スパイクピン
穴形成用突起４とカーフ形成用突起２との相対間距離ｍ
を５〜１５＋ｖｎ＋の範囲内にするのがよい。In such a mold according to the present invention, the shape of the cuff-forming projections 2 can take various shapes, but usually takes a plate-like shape and is arranged along the tire circumferential direction. However, in order to effectively prevent cracks in the tire blocks when releasing the mold from a tire produced by the mold of the present invention, it is necessary to
Figures 4 (a) and (a) show the dimensions and their positional relationships.
The relationship b) is satisfied, that is, the projected length of the calf forming projection 2 is 7! (As described later, the protrusions for forming the kerf take various shapes, so the projected length) shall be at least 5 m111 or more, and the maximum height d shall be 30% or less of the height of the protrusion for forming the spike pin hole, and , the relative distance m between the spike pin hole forming protrusion 4 and the kerf forming protrusion 2
is preferably within the range of 5 to 15+vn+.

そして、カーフ形成用突起２はその投影長さの方向がタ
イヤ周方向に沿うように配置するのがよい。・ このような本発明の金型に設けるカーフ形成用突起２の
形状は、上記第１図や第４図の直線状のものに限定され
るものではなく、種々の態様をとることができる。たと
えば第５図（イ）、（ロ）、（ハ）、（ニ）および（ホ
）の平面図に、本発明の金型に設けるカーフ形成用突起
の形状の他の態様を示した。It is preferable that the cuff-forming protrusion 2 is arranged so that the direction of its projected length is along the circumferential direction of the tire. - The shape of the cuff-forming protrusion 2 provided in the mold of the present invention is not limited to the linear shape shown in FIGS. 1 and 4, but can take various forms. For example, the plan views of FIGS. 5(a), (b), (c), (d), and (e) show other embodiments of the shape of the kerf-forming protrusion provided in the mold of the present invention.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、スパイクタイヤを金型で成形した後金
型を離型させる際、タイヤセンター位置のブロックに設
けたスパイクピン穴の近傍に発生するひび割れを有効に
防止することができる。したがって、工業的にスパイク
タイヤを製造する場合の品質の安定、生産性の向上に寄
与するのみならず、上記スパイクタイヤのブロック形状
やピン位置などスパイクタイヤ設計における自由度を大
きく拡張し、新規で高性能のスパイクタイヤの製造を可
能にする。According to the present invention, when a spiked tire is molded with a mold and then the mold is released, it is possible to effectively prevent cracks from occurring in the vicinity of the spike pin hole provided in the block at the tire center position. Therefore, it not only contributes to stabilizing quality and improving productivity when manufacturing spiked tires industrially, but also greatly expands the degree of freedom in designing spiked tires such as the block shape and pin position of the spiked tires mentioned above, and creates new and innovative products. Enabling the production of high-performance spiked tires.

【図面の簡単な説明】[Brief explanation of drawings]

第１図（イ）、（ロ）および（ハ）並びに第２図（イ）
、（ロ）および（ハ）はそれぞれ、本発明になる金型お
よび従来の金型の部分平面図、該平面図のＡ−Ａ線にお
ける断面図およびタイヤからの該金型離型時のブロック
の変形状態を示す断面図、第３図は本発明の金型によっ
て得られたタイヤのブロックパターンの１例を示す平面
図、第４図（イ）および（ロ）はそれぞれ本発明の金型
の寸法を示す平面図および該金型のカーフ形成用突起の
形状を示す側面図、第５図（イ）、（ロ）、（ハ）　（
ニ）および（ホ）はそれぞれ、本発明の金型のスパイク
ピン穴形成用突起とそれに近接して設けるカーフ形成用
突起の形状を示す平面図である。 １・・・金型、２・・・カーフ形成用突起、３・・・ブ
ロック、４・・・スパイクピン穴形成用突起。Figure 1 (a), (b) and (c) and Figure 2 (a)
, (b) and (c) are partial plan views of a mold according to the present invention and a conventional mold, a sectional view taken along line A-A of the plan view, and a block when the mold is released from a tire. FIG. 3 is a plan view showing an example of a tire block pattern obtained by the mold of the present invention, and FIGS. 4 (A) and (B) respectively show the mold of the present invention. A plan view showing the dimensions of the mold and a side view showing the shape of the kerf forming protrusion of the mold, FIGS.
d) and (e) are plan views showing the shapes of a spike pin hole forming projection and a kerf forming projection provided close to the spike pin hole forming projection of the mold of the present invention, respectively. DESCRIPTION OF SYMBOLS 1...Mold, 2...Protrusion for forming a kerf, 3...Block, 4...Protrusion for forming a spike pin hole.

Claims (1)

【特許請求の範囲】[Claims] スパイクピン埋め込み穴形成用突起に近接して、該スパ
イクピン埋め込み穴形成用突起の二つ割位置側にカーフ
形成用突起を設けたスパイクタイヤ用金型。A mold for a spiked tire, in which a protrusion for forming a kerf is provided close to a protrusion for forming a hole for embedding a spike pin, and a protrusion for forming a kerf is provided on the halving position side of the protrusion for forming a hole for embedding a spike pin.
JP62149157A 1987-06-17 1987-06-17 Metal mold for spike tire Pending JPS63312826A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62149157A JPS63312826A (en) 1987-06-17 1987-06-17 Metal mold for spike tire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62149157A JPS63312826A (en) 1987-06-17 1987-06-17 Metal mold for spike tire

Publications (1)

Publication Number Publication Date
JPS63312826A true JPS63312826A (en) 1988-12-21

Family

ID=15469036

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62149157A Pending JPS63312826A (en) 1987-06-17 1987-06-17 Metal mold for spike tire

Country Status (1)

Country Link
JP (1) JPS63312826A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0729826A2 (en) * 1995-03-03 1996-09-04 Nokian Renkaat OyJ. Vehicle tyre that can be elastically fitted with studs
JP2011521844A (en) * 2008-06-03 2011-07-28 ソシエテ ド テクノロジー ミシュラン Ice tire
JP2011521845A (en) * 2008-06-03 2011-07-28 ソシエテ ド テクノロジー ミシュラン Ice tire
JP2012035535A (en) * 2010-08-09 2012-02-23 Bridgestone Corp Studdable tire, its manufacturing method, tire mold and mold pin
JP2013091406A (en) * 2011-10-25 2013-05-16 Bridgestone Corp Tire
JP2013180584A (en) * 2012-02-29 2013-09-12 Bridgestone Corp Tire
WO2016052322A1 (en) * 2014-09-29 2016-04-07 横浜ゴム株式会社 Pneumatic tire
JP2016166014A (en) * 2016-06-07 2016-09-15 株式会社ブリヂストン Tire
CN112351896A (en) * 2018-07-13 2021-02-09 倍耐力轮胎股份公司 Studded tyre for vehicle wheels

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0729826A2 (en) * 1995-03-03 1996-09-04 Nokian Renkaat OyJ. Vehicle tyre that can be elastically fitted with studs
EP0729826A3 (en) * 1995-03-03 1997-04-02 Nokian Renkaat Oy Vehicle tyre that can be elastically fitted with studs
JP2011521844A (en) * 2008-06-03 2011-07-28 ソシエテ ド テクノロジー ミシュラン Ice tire
JP2011521845A (en) * 2008-06-03 2011-07-28 ソシエテ ド テクノロジー ミシュラン Ice tire
JP2012035535A (en) * 2010-08-09 2012-02-23 Bridgestone Corp Studdable tire, its manufacturing method, tire mold and mold pin
JP2013091406A (en) * 2011-10-25 2013-05-16 Bridgestone Corp Tire
JP2013180584A (en) * 2012-02-29 2013-09-12 Bridgestone Corp Tire
WO2016052322A1 (en) * 2014-09-29 2016-04-07 横浜ゴム株式会社 Pneumatic tire
CN106573507A (en) * 2014-09-29 2017-04-19 横滨橡胶株式会社 Pneumatic tire
RU2657533C1 (en) * 2014-09-29 2018-06-14 Дзе Йокогама Раббер Ко., Лтд. Pneumatic tyre
JP2016166014A (en) * 2016-06-07 2016-09-15 株式会社ブリヂストン Tire
CN112351896A (en) * 2018-07-13 2021-02-09 倍耐力轮胎股份公司 Studded tyre for vehicle wheels

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