JP2000102925A - Sipe forming skeleton and production of tire mold - Google Patents

Sipe forming skeleton and production of tire mold

Info

Publication number
JP2000102925A
JP2000102925A JP27371198A JP27371198A JP2000102925A JP 2000102925 A JP2000102925 A JP 2000102925A JP 27371198 A JP27371198 A JP 27371198A JP 27371198 A JP27371198 A JP 27371198A JP 2000102925 A JP2000102925 A JP 2000102925A
Authority
JP
Japan
Prior art keywords
bone
mold
sipe
tire
tire mold
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
JP27371198A
Other languages
Japanese (ja)
Inventor
Yasuyuki Ishihara
泰之 石原
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.)
NGK Fine Molds Ltd
Original Assignee
NGK Fine Molds 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 NGK Fine Molds Ltd filed Critical NGK Fine Molds Ltd
Priority to JP27371198A priority Critical patent/JP2000102925A/en
Publication of JP2000102925A publication Critical patent/JP2000102925A/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)
    • B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
    • B29D30/0606—Vulcanising moulds not integral with vulcanising presses
    • 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)
    • B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
    • B29D30/0606—Vulcanising moulds not integral with vulcanising presses
    • B29D2030/0607—Constructional features of the moulds
    • B29D2030/0613—Means, e.g. sipes or blade-like elements, for forming narrow recesses in the tyres, e.g. cuts or incisions for winter tyres

Landscapes

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

Abstract

PROBLEM TO BE SOLVED: To facilitate dimensional control in a wall thickness direction, to reduce the production manhours to make cost and a delivery period advantageous and to apply a sipe high in dimensional accuracy to a tire. SOLUTION: For example, skeletal pieces 21, 22, 23 comprising a plurality of metal plates different in the shapes in the thickness direction corresponding to the gap of sipes are superposed one upon another to assemble a sipe for forming one sipe and the cast flange 2a shown by the lower part of the dotted lines of a drawing is set to at least leg part as the part embedded in a tire mold.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、タイヤに溝、特に
サイプと呼ばれる細い溝を形成するための骨、およびそ
れを備えたタイヤ成形用金型（以下、単にタイヤ金型と
いう）の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bone for forming a groove, particularly a thin groove called a sipe, in a tire, and a method for manufacturing a tire mold (hereinafter simply referred to as a tire mold) provided with the bone. About.

【０００２】[0002]

【従来の技術】タイヤの成形には、タイヤをその円周上
で２分割した上下分割型と幅方向分割線で７分割〜１０
分割した上下一体型のタイヤ金型が一般的に用いられて
いる。このタイヤ金型は、その軽量性、良熱伝導性など
の要請からアルミニウム合金で製造されることが多く、
石膏鋳型による鋳造金型（重力鋳造あるいは低圧鋳造の
よる）、または鉄系材料鋳型もしくはグラファイト材鋳
型による鋳造金型（ダイキャスト品）が一般的である。2. Description of the Related Art A tire is formed by dividing the tire into two parts on the circumference of the tire and dividing the tire into seven parts by a dividing line in the width direction.
A divided upper and lower integrated tire mold is generally used. This tire mold is often made of an aluminum alloy due to its light weight, good thermal conductivity, etc.,
A casting mold using a gypsum mold (by gravity casting or low pressure casting), or a casting mold (a die-cast product) using an iron-based material mold or a graphite material mold is generally used.

【０００３】一方、タイヤには、通常円周方向に沿って
刻まれるリブと呼ばれる溝や、厚み幅方向に刻まれるラ
グと呼ばれる溝が設けられている。そして、スタッドレ
スタイヤ等の場合には、さらにサイプと呼ばれる比較的
細幅な溝も設けられている。このような溝を有するタイ
ヤを成形するための金型には、それぞれの溝に対応した
突起が設けられるが、サイプのような細幅な溝に対応す
る突起は薄肉形状のものとなる。[0003] On the other hand, a tire is provided with a groove called a rib which is usually carved along the circumferential direction and a groove called a lug which is carved in the thickness width direction. In the case of a studless tire or the like, a relatively narrow groove called a sipe is further provided. A mold for molding a tire having such grooves is provided with projections corresponding to the respective grooves, but the projections corresponding to narrow grooves such as sipes have a thin shape.

【０００４】このような薄肉形状の突起としては、アル
ミニウム合金では強度が不十分であるところから、ステ
ンレス鋼など鉄系の薄肉板を切断、プレス曲げなどの加
工を行い所定形状とした板材を金型材に埋め込んで形成
される。このような所定形状とした金属板材を本発明で
は、骨と呼称することとする。[0004] As such a thin-walled projection, since an aluminum alloy is insufficient in strength, an iron-based thin plate such as stainless steel is cut, pressed, bent, or the like, and a sheet material having a predetermined shape is formed of gold. It is formed by embedding it in a mold. In the present invention, such a metal plate material having a predetermined shape is referred to as a bone.

【０００５】この場合、骨の埋め込みは次のような方法
によって行われる。タイヤ金型において露出する部分
を、鋳型の段階では鋳型材中に埋設しておき、この鋳型
にアルミニウムなどの溶湯を注入すれば、図１７の
（Ａ）縦型フラスコ骨、（Ｂ）横型フラスコ骨、（Ｃ）
尖塔型骨の形状に示されるように、鋳型材（図示せず）
から突出した部分が鋳ぐるみ代１２となってタイヤ金型
１３に埋設した状態で骨部１０が固定される。そこで鋳
型材を除去すれば、鋳型材中に埋設していた部分が露出
してサイプ形成用骨部１１を形成するのである。なお、
鋳ぐるみ代１２の穿設された孔１４は、固定強化用のロ
ッキングホールである。In this case, bone is implanted by the following method. The exposed portion of the tire mold is buried in a mold material at the mold stage, and a molten metal such as aluminum is injected into the mold. Bone, (C)
Mold material (not shown) as shown in the shape of the spire bone
The portion protruding from the hole serves as a cast-in allowance 12 and the bone portion 10 is fixed in a state of being embedded in the tire mold 13. Therefore, if the mold material is removed, the portion buried in the mold material is exposed to form the sipe-forming bone 11. In addition,
The hole 14 formed in the insert allowance 12 is a locking hole for strengthening the fixing.

【０００６】これら骨には、鉄鋼系材料の圧延材を用い
て製作する場合が多いが、このときには、厚みを部分的
に変化させるなど、板厚方向の形状に変化を持たせるこ
とは簡単に行うことができなかった。従来、骨の板厚方
向の形状に変化を与えるには、異形状圧延、自由鍛造
（型鍛造）、複数部材の溶接あるいはロウ付け接合、エ
ッチング、鋳造（ロストワックス法）などの方法が採用
され得るが、いずれも高コスト、長納期となることから
必ずしも実用的な方法ではなかった。In many cases, these bones are manufactured using a rolled material of a steel-based material. At this time, it is easy to change the shape in the plate thickness direction, for example, by partially changing the thickness. Could not do. Conventionally, in order to change the shape of the bone in the thickness direction, methods such as irregular shape rolling, free forging (die forging), welding or brazing of multiple members, etching, casting (lost wax method), and the like have been adopted. However, they are not always practical methods because of high cost and long delivery time.

【０００７】[0007]

【発明が解決しようとする課題】本発明は、上記の問題
点を解決するためになされたものであり、肉厚方向の寸
法制御が容易であり、製作工数も少なくコスト、納期に
有利であって、寸法精度の高いサイプをタイヤに付与す
ることができるサイプ形成用骨およびそのサイプ形成用
骨を配置するタイヤ金型の製造方法を提供する。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the dimensional control in the thickness direction is easy, the number of manufacturing steps is small, and the cost and delivery time are advantageous. In addition, the present invention provides a sipe-forming bone capable of providing a sipe with high dimensional accuracy to a tire and a method of manufacturing a tire mold for disposing the sipe-forming bone.

【０００８】[0008]

【課題を解決するための手段】上記の問題を解決した本
発明のサイプ形成用骨は、タイヤにサイプを形成するた
めタイヤ金型に設けられる骨であって、複数の骨ピース
を重ね合わせて組み立てられ、少なくともその脚部に前
記タイヤ金型に埋設される鋳ぐるみ代を設定したことを
特徴とするものである。The sipe-forming bone of the present invention which has solved the above-mentioned problem is a bone provided in a tire mold for forming a sipe in a tire. It is characterized in that it is assembled and at least its legs have a casting allowance to be embedded in the tire mold.

【０００９】さらに、同じく本発明のタイヤ金型の製造
方法は、原型から作成した鋳型に、アルミニウム合金の
溶湯を注入してタイヤ金型を鋳造する方法において、複
数の骨ピースを重ね合わせて、前記鋳型に配置し、前記
鋳造と同時に、前記骨ピースの少なくとも重ね合わせた
脚部の鋳ぐるみ代を鋳ぐるむことによりタイヤ金型に固
定し、サイプ形成用骨部に形成することを特徴とするも
のである。Further, a method of manufacturing a tire mold according to the present invention is a method of casting a tire mold by injecting a molten metal of an aluminum alloy into a mold prepared from a prototype. Arranged in the mold, at the same time as the casting, fixed to the tire mold by stuffing the stuffing allowance of at least the overlapped leg portion of the bone piece, forming a sipe forming bone portion. Is what you do.

【００１０】[0010]

【発明の実施の形態】次に，本発明のサイプ形成用骨に
係る実施形態について、図１、２を参照しながら説明す
る。本発明のサイプ形成用骨は、所定の隙間幅および長
さがあって、内部に所定の空間構造を有するサイプを形
成するためのものであって、例えば、図１の尖塔型骨の
斜視図に示すように、そのサイプの隙間に対応する厚さ
方向の形状を異にする複数枚の金属板からなる骨ピース
２１、２２、２３を重ね合わせて、一個のサイプ形成用
骨２を組み立てるところに第１の特徴があり、さらに、
その少なくとも脚部に、図１の鎖線の下部の部分で示さ
れる鋳ぐるみ代２ａを、前記タイヤ金型に埋設される部
分として、設定したところに第２の特徴がある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a bone for forming a sipe according to the present invention will be described with reference to FIGS. The sipe-forming bone of the present invention has a predetermined gap width and length and is for forming a sipe having a predetermined space structure therein. For example, a perspective view of the spire bone shown in FIG. As shown in FIG. 2, bone pieces 21, 22, and 23 made of a plurality of metal plates having different shapes in the thickness direction corresponding to the gaps of the sipe are superimposed to assemble one sipe forming bone 2. Has the first feature,
A second feature is that at least the leg portion is provided with a cast-in allowance 2a indicated by a portion below the chain line in FIG. 1 as a portion embedded in the tire mold.

【００１１】この第１と第２の特徴を図２（Ａ）断面図
で示すと、骨ピース２１、２２、２３を重ね合わせて、
一個のサイプ形成用骨２が組み立てられ、その脚部に、
タイヤ金型３に埋設される部分として、鋳ぐるみ代２ａ
が設定されている。この鋳ぐるみ代２ａに相当する脚部
は、すべての構成骨ピースが集中して重ね合わされてい
る部分を含む必要があり、鋳ぐるみ代２ａの大部分が構
成骨ピースの積層構造からなるのが好ましい。なお、鋳
ぐるみ代２ａを貫通しているロッキングホール４には、
タイヤ金型３の成分金属が充填されている。また、図２
（Ｂ）は５枚の骨ピースからなる尖塔型骨の事例、
（Ｃ）は頂部の偏った尖塔型の事例である。When the first and second features are shown in a sectional view of FIG. 2A, the bone pieces 21, 22, 23 are superimposed on each other.
One sipe-forming bone 2 is assembled, and its legs are
As a part to be embedded in the tire mold 3, a cast-in allowance 2a
Is set. It is necessary that the leg portion corresponding to the insert allowance 2a includes a portion in which all the constituent bone pieces are concentrated and overlapped, and most of the insert allowance 2a has a laminated structure of the constituent bone pieces. preferable. In addition, in the locking hole 4 penetrating the cast-in allowance 2a,
The component metal of the tire mold 3 is filled. FIG.
(B) is an example of a spire bone composed of five bone pieces,
(C) is a case of a spire type with a deviated top.

【００１２】このように重ね合わされた骨ピースは、そ
れら相互間は金属学的に接合された状態にある必要はな
く、鋳型に配置されたときは、鋳造作業に耐えられる程
度に固定されていればよく、またタイヤ金型には、その
脚部の鋳ぐるみ代が鋳ぐるまれて埋設されればよいもの
である。従って、骨ピースは相互に溶接またはロウ付け
する必要はない。また、これら骨ピースは、同一肉厚、
同一材質である必要もなく、付与される形状、要求され
る強度特性などに対応して、ステンレス鋼、炭素鋼など
適宜に設定すればよいのである。[0012] The bone pieces thus superimposed need not be in a metallurgically joined state between them, and when placed in a mold, they are fixed enough to withstand the casting operation. What is necessary is just to embed in the tire mold the casting allowance of the leg part. Thus, the bone pieces need not be welded or brazed to one another. Also, these bone pieces have the same thickness,
It is not necessary to use the same material, and stainless steel, carbon steel, or the like may be appropriately set according to the shape to be provided, the required strength characteristics, and the like.

【００１３】次に、本発明のタイヤ金型の製造方法に係
る実施形態について、図１〜３を参照して説明すると同
時に、本発明のサイプ形成用骨にに付いて補足する。先
ず、タイヤ金型の製造工程としては、基本的に(1) 原型
から鋳型を作成する工程、(2) 得られた鋳型を用いてタ
イヤ金型を鋳造する工程からなるのであるが、本発明の
タイヤ金型の製造方法は、サイプ形成用骨部を形成する
タイヤ金型の製造方法であって、所定形状の複数の骨
ピースを準備する、これらを重ね合わせて、複合骨ピ
ースとする、この複合骨ピースを前記鋳型に配置す
る、タイヤ金型を鋳造すると同時に、前記骨ピースの
少なくとも重ね合わせた脚部の鋳ぐるみ代を鋳ぐるむこ
とによりタイヤ金型に固定し、サイプ形成用骨部に形成
することを特徴とする。Next, an embodiment of the method for manufacturing a tire mold according to the present invention will be described with reference to FIGS. First, the tire mold manufacturing process basically includes (1) a step of making a mold from a prototype, and (2) a step of casting a tire mold using the obtained mold. The method for manufacturing a tire mold is a method for manufacturing a tire mold for forming a sipe-forming bone portion, in which a plurality of bone pieces having a predetermined shape are prepared. The composite bone piece is placed in the mold, and at the same time as the tire mold is cast, at least the stuffing allowance of at least the overlapped leg portion of the bone piece is fixed to the tire mold by casting, thereby forming a bone for sipe formation. It is characterized in that it is formed in a part.

【００１４】以下、順序に従い説明すると、先ず、骨を
構成する複数枚の骨ピースを準備する。その複数の骨ピ
ースは同一形状であってもよいが、複雑なサイプ形状が
製作できるよう、骨ピース個々が外形輪郭、くり抜かれ
た空間形状など厚さ方向の面の形状を異にする場合に本
発明は有効に適用され得る。これには、型抜き、レーザ
カット、ワイヤ放電加工、ウォータジェット加工、ケミ
カルエッチングなどの手法で所望の金属板から切り出
し、打ち抜き、必要なれば型曲げ、バレル研磨などの加
工を施しておく。In the following, the order will be described. First, a plurality of bone pieces constituting a bone are prepared. The plurality of bone pieces may have the same shape.However, in order to produce a complicated sipe shape, when each bone piece has a different shape in the thickness direction such as an outer contour, a hollow space shape, etc. The present invention can be applied effectively. For this, a desired metal plate is cut out from a desired metal plate by a method such as die cutting, laser cutting, wire electric discharge machining, water jet machining, chemical etching, and the like, and punching, if necessary, mold bending, barrel polishing and the like are performed.

【００１５】この骨ピース単独の段階で、各骨ピースの
脚部には共通位置にアンダカットを施し、必要なロッキ
ングホールなどは予め作成しておく。図２に例示するよ
うに、このロッキングホール４は、この骨ピース２１、
２２、２３などを組み合わせてタイヤ金型３に鋳ぐるん
で配置したとき、骨部分が抜け落ちないようにタイヤ金
型３の金属部分が、充填貫通する部分であり、各骨ピー
スを重ね合わせたときに、オーバハングの無いストレー
トな貫通孔になるように各骨ピースの鋳ぐるみ代２ａの
部分に設けられているのが好ましい。At the stage of the bone pieces alone, undercuts are made at common positions on the legs of each bone piece, and necessary locking holes and the like are created in advance. As illustrated in FIG. 2, the locking hole 4 includes the bone piece 21,
The metal part of the tire mold 3 is a part that penetrates the filling so that the bone part does not fall out when the tire mold 3 is cast and arranged on the tire mold 3 by combining 22, 22 and the like. In addition, it is preferable to provide a straight through hole without overhang at the portion of the cast-in allowance 2a of each bone piece.

【００１６】また、図１、２に示すように、このサイプ
形成用骨に空気流通孔であるベントホール５（クロスベ
ント）を設ける設計の場合には、この骨ピースの段階で
それぞれを重ね合わせたときに貫通する位置関係になる
ようあらかじめ穿設しておくのがよい。As shown in FIGS. 1 and 2, when the sipe forming bone is provided with a vent hole 5 (cross vent) which is an air flow hole, the bone pieces are superposed at the stage of this bone piece. It is better to drill in advance so that it will be in a positional relationship when it penetrates.

【００１７】さらに、このような個々の骨ピースを所定
の配置に重ね合わせるためには、少なくとも外周形状の
一部を、例えば下半分の脚部の外周形状を同一形状に製
作しておき、その外周面を基準に揃えて配置する方法、
あるいはロッキングホールまたはベントホールをその寸
法、位置を同一に製作しておき、それにガイドピンを嵌
め込んで位置決めする方法などが適宜採用できる。Further, in order to superimpose such individual bone pieces in a predetermined arrangement, at least a part of the outer peripheral shape, for example, the outer peripheral shape of the lower half leg is manufactured in the same shape, and A method of aligning with the outer peripheral surface as a reference,
Alternatively, a method in which the locking hole or the vent hole is manufactured in the same size and position, and a guide pin is fitted into the locking hole or the vent hole to determine the position can be appropriately adopted.

【００１８】また、前記方法により各骨ピースを所定の
位置合わせにより重ね合わせる場合、瞬間接着剤（シア
ノアクリレート系接着剤）による接着や、図３に例示す
るようなクリップ６による機械的締め付けあるいはワイ
ヤピン７による結束などによって仮止めしておけば、組
み立てたサイプ形成用骨を石膏鋳型などに部分的に埋め
込む作業において、取扱が便利になる。Further, when the bone pieces are overlapped by predetermined alignment by the above-mentioned method, bonding with an instantaneous adhesive (cyanoacrylate-based adhesive), mechanical fastening with a clip 6 as shown in FIG. If the bones are temporarily fixed by bundling, for example, in the operation of partially embedding the assembled sipe-forming bone in a gypsum mold or the like, handling becomes convenient.

【００１９】図３（Ａ）には、重ね合わされた骨ピース
２１、２２、２３の脚部の図中鎖線以下に設定された鋳
ぐるみ代２ａの部分をクリップ６によって締めつけた状
態を示している。この場合には、鋳型に固定した後、ク
リップ６を除去することなく鋳造してタイヤ金型中にそ
のまま鋳ぐるんでしまっても差し支えがない。FIG. 3 (A) shows a state in which the portion of the cast-in allowance 2a set below the chain line in the drawing of the superposed bone pieces 21, 22, 23 is fastened by the clip 6. . In this case, after fixing to the mold, casting without removing the clip 6 and casting it in the tire mold as it is does not hurt.

【００２０】図３（Ｂ）には、（Ａ）の場合と異なり、
重ね合わされた骨ピース２１、２２、２３の脚部の鋳ぐ
るみ代２ａの上方をクリップ６によって締めつけた状態
を示している。この場合には、鋳型を石膏注型で製作し
る場合には、このクリップ６を付けたまま、鋳型中に埋
設してもよいものである。FIG. 3B is different from the case of FIG.
The state where the upper part of the insert allowance 2a of the legs of the superimposed bone pieces 21, 22, 23 is tightened by the clip 6 is shown. In this case, when the mold is manufactured by casting the plaster, the clip 6 may be buried in the mold with the clip 6 attached.

【００２１】図３（Ｂ）には、ベントホール５またはロ
ッキングホール４を位置合わせの基準とする場合に、そ
れらの孔に適宜材質のワイヤピン７を跨がらせて挿入し
てそれぞれを仮止めする状態を示した。ロッキングホー
ル４には、同径の棒状ピンを嵌着させて仮止めすること
も好ましい。いずれの方法も、作業性を高めるので好ま
しいが、鋳型に固定した後で取り外しておく必要があ
る。In FIG. 3B, when the vent hole 5 or the locking hole 4 is used as a reference for positioning, a wire pin 7 made of an appropriate material is straddled and inserted into those holes to temporarily fix them. The state was shown. It is also preferable that a rod-shaped pin having the same diameter is fitted into the locking hole 4 and temporarily fixed. Either method is preferable because it enhances workability, but it is necessary to remove it after fixing it to the mold.

【００２２】このようにして各骨ピースを重ね合わせ、
組立てて、仮固定した複合骨ピースをゴム製原型にセッ
トし、鋳型形成材、例えば石膏スラリーを注型して鋳型
を形成すると同時に前記複合骨ピースを鋳型に固定して
配置する。あるいは、この同時固定が形状の都合で行い
がたい場合には、得られた鋳型に直接差し込んで固定す
るようにしてもよい。In this manner, the bone pieces are superimposed,
The assembled and temporarily fixed composite bone piece is set in a rubber mold, and a mold forming material, for example, a gypsum slurry is cast to form a mold, and at the same time, the composite bone piece is fixed and arranged in the mold. Alternatively, when the simultaneous fixing is difficult due to the shape, it may be directly inserted into the obtained mold and fixed.

【００２３】次いで、この所定の骨ピースを配置した鋳
型にアルミニウム合金の溶湯を注入してタイヤ金型を鋳
造する。このようにして、サイプ形成用骨を備えたタイ
ヤ金型を鋳造して製作すれば、予め配置された骨ピース
の少なくとも脚部の鋳ぐるみ代はそのアルミニウム合金
中に埋没して鋳ぐるまれるのであるが、溶湯が凝固、冷
却するときの収縮により応力が強力な拘束力として働
き、各骨ピース自体を一体化させるとともに、タイヤ金
型に対しても一体化させることになるのである。Next, a molten metal of an aluminum alloy is poured into a mold in which the predetermined bone pieces are arranged, and a tire mold is cast. In this manner, if the tire mold having the sipe-forming bone is cast and manufactured, at least the leg of the pre-arranged bone piece is buried in the aluminum alloy and buried. However, the stress acts as a strong restraining force due to shrinkage when the molten metal solidifies and cools, so that each bone piece is integrated and also integrated with the tire mold.

【００２４】[0024]

【実施例】次に、図４〜図１６に示す実施例に基づいて
本発明を詳細に説明する。 （実施例１）図４において、サイプ形成用の尖塔型骨の
バリエイション（Ａ）（Ｂ）（Ｃ）を示す。中心の骨ピ
ース２１を挟む２枚の骨ピース２２、２３から構成さ
れ、脚部に鋳ぐるみ代２ａが設定されている。図５に
は、この尖塔型のサイプ形成用骨２（骨ピース２１、２
２、２３ともに、０．５ｍｍｔ、ＳＵＳ６３１薄板の加
工品）が鋳ぐるみ代２ａにおいて、タイヤ金型３および
そこに設けられているラグなど形成用の厚みのある骨３
１に鋳ぐるまれた状態が示されている。この場合、鋳ぐ
るみ代２ａは、脚部と左右の側縁部に設定されていて、
全体が強固に鋳ぐるまれることになる。なお、ロッキン
グホール４は、孔径３ｍｍφに、ベントホール５は、孔
径０．８ｍｍφに穿設されている。Next, the present invention will be described in detail with reference to the embodiments shown in FIGS. (Embodiment 1) FIG. 4 shows variations (A), (B) and (C) of a spire type bone for forming a sipe. It is composed of two bone pieces 22 and 23 sandwiching a central bone piece 21, and a cast-in allowance 2a is set on the leg. FIG. 5 shows this spire-shaped sipe-forming bone 2 (bone pieces 21, 2).
0.5 mmt in both 2 and 23, SUS631 thin plate processed product) in the insert allowance 2a, the tire mold 3 and the thick bone 3 for forming lugs and the like provided therein.
In FIG. 1, the state of being cast is shown. In this case, the casting allowance 2a is set on the leg and the left and right side edges,
The whole will be firmly cast. The locking hole 4 has a hole diameter of 3 mmφ, and the vent hole 5 has a hole diameter of 0.8 mmφ.

【００２５】（実施例２）図６において、サイプ形成用
の疑似フラスコ型骨の１事例を示す。中心の骨ピース２
１を挟む２枚の窓付き骨ピース２２、２３から構成さ
れ、脚部に鋳ぐるみ代２ａが設定されている。図７に
は、実施例２として、骨ピース２１（０．７ｍｍｔ、Ｍ
ＡＳ１Ｃ板材）、骨ピース２２、２３（１．２ｍｍｔ、
ＭＡＳ１Ｃ板材）からなる疑似フラスコ型骨の斜線で示
される鋳ぐるみ代２ａを、先に説明した場合と同様に、
タイヤ金型３およびラグなど形成用骨３１に、鋳ぐるん
だ状態が示されている。(Example 2) FIG. 6 shows one example of a pseudo-flask type bone for forming a sipe. Central bone piece 2
1 is composed of two pieces of bone pieces 22 and 23 with a window, and a cast-in allowance 2a is set on the leg. FIG. 7 shows a bone piece 21 (0.7 mmt, M
AS1C plate), bone pieces 22, 23 (1.2 mmt,
MAS1C plate material), the cast-in allowance 2a indicated by oblique lines of the pseudo-flask-shaped bone, as in the case described above,
The tire mold 3 and the forming bone 31 such as a lug are shown in a cast-in state.

【００２６】（実施例３）図８において、サイプ形成用
の矩形断面型骨の２事例を示す。中心の骨ピース２１を
挟む２枚の櫛歯状骨ピース２２、２３から構成され、脚
部に鋳ぐるみ代２ａが設定されている。（Ａ）は櫛歯が
一致したもの、（Ｂ）は櫛歯をジグザグにしたものを表
す。図９には、実施例３として、骨ピース２１（０．３
ｍｍｔ、ＭＡＳ１Ｃ板材）に櫛歯状骨ピース２２、２３
（０．７ｍｍｔ、ＭＡＳ１Ｃ板材）をジグザグにして重
ね合わせた矩形断面型骨の斜線で示される鋳ぐるみ代２
ａを、先に説明した場合と同様に、タイヤ金型３および
ラグなど形成用骨３１に、鋳ぐるんだ状態が示されてい
る。(Embodiment 3) FIG. 8 shows two examples of a bone having a rectangular cross-section for forming a sipe. It is composed of two comb-shaped bone pieces 22 and 23 sandwiching a central bone piece 21, and a cast-in allowance 2a is set on the leg. (A) shows the comb teeth matched, and (B) shows the zigzag comb teeth. FIG. 9 shows a bone piece 21 (0.3
mmt, MAS1C plate material) and comb-shaped bone pieces 22, 23
(0.7 mmt, MAS1C plate) zigzag and superimposed as shown by hatching of rectangular cross-section bone 2
In the same manner as in the case described above, a is shown as being cast into the tire mold 3 and the forming bone 31 such as a lug.

【００２７】（実施例４）図１０において、左右対称に
反対側に屈曲した骨ピース２１ａ、２１ｂからなるタイ
プ（Ａ）、中心の骨ピース２１を挟む２枚の屈曲状骨ピ
ース２２、２３からなるタイプ（Ｂ）のサイプ形成用の
分岐型骨の２事例を示す。先の例と同様に脚部に鋳ぐる
み代２ａが設定されている。図１１には、実施例４とし
て、屈曲させた骨ピース２１ａ、２１ｂ（０．５ｍｍ
ｔ、ＭＡＳ１Ｃ板材）を張り合わせた得た分岐型骨の斜
線で示される鋳ぐるみ代２ａを、先に説明した場合と同
様に、タイヤ金型３およびラグなど形成用骨３１に、鋳
ぐるんだ状態が示されている。(Embodiment 4) In FIG. 10, a type (A) comprising bone pieces 21a and 21b bent symmetrically to opposite sides, and two bent bone pieces 22 and 23 sandwiching a central bone piece 21 are shown. 2 shows two examples of a branch type bone for forming a sipe of the following type (B). As in the previous example, a cast-in allowance 2a is set on the leg. In FIG. 11, as Example 4, bent bone pieces 21a and 21b (0.5 mm
t, a MAS1C plate material), and the cast-in allowance 2a, which is indicated by oblique lines of the obtained branch-type bone, is cast into the tire mold 3 and the forming bone 31 such as lugs in the same manner as described above. The state is shown.

【００２８】（実施例５）図１２において、上方分岐型
のサイプ形成用骨の３事例を示す。左右対称な屈曲骨ピ
ース２１ａ、２１ｂからなるタイプ（Ａ）、左右非対称
な骨ピース２１ｃ、２１ｄからなるタイプ（Ｂ）、中心
の骨ピース２１を挟む２枚の屈曲骨ピース２２、２３か
らなるタイプ（Ｃ）などの上方分岐型骨であって、先の
例と同様にそれぞれの脚部に鋳ぐるみ代２ａが設定され
ている。(Embodiment 5) FIG. 12 shows three examples of an upper branch type sipe forming bone. Type (A) composed of symmetrical bent bone pieces 21a and 21b, type (B) composed of asymmetrical bone pieces 21c and 21d, and type composed of two bent bone pieces 22 and 23 sandwiching central bone piece 21 (C) and the like, and as in the previous example, a cast-in allowance 2a is set for each leg.

【００２９】（実施例６）図１３において、左側に正面
図、右側にｘ−ｘ断面図を表し、中心の骨ピース２１、
両側面の骨ピース２２、２３からなり、表裏から貫通し
ていない凹部を交互に整列させて設け、ブロック剛性の
向上や石噛み防止を意図したサイプ形成用の骨構造の２
例（Ａ）（Ｂ）が示されている。図１４には、この
（Ａ）類似の構造の実施例６として、骨ピース２１、２
２、２３（いずれも０．４ｍｍｔ、ＳＵＳ６３１板材）
を重ね合わせたうえ、その斜線で示される鋳ぐるみ代２
ａを、先に説明した場合と同様に、タイヤ金型３および
ラグなど形成用骨３１に、鋳ぐるんだ状態が示されてい
る。(Embodiment 6) In FIG. 13, a front view is shown on the left side, and a xx cross-sectional view is shown on the right side.
A bone structure for sipe formation intended to improve block rigidity and prevent stone biting is provided by alternately arranging concave portions which are composed of bone pieces 22 and 23 on both sides and do not penetrate from the front and back.
Examples (A) and (B) are shown. FIG. 14 shows bone pieces 21 and 2 as a sixth embodiment having a similar structure (A).
2, 23 (0.4 mmt, SUS631 plate)
And the cast-in allowance 2 indicated by the diagonal lines
In the same manner as in the case described above, a is shown as being cast into the tire mold 3 and the forming bone 31 such as a lug.

【００３０】（実施例７）図１５において、左側に正面
図、右側にｘ−ｘ断面図を表し、骨ピース２１、２２か
らなり、ベントホールの孔径とその位置関係を変化させ
て、タイヤゴムの切断位置を規制するための骨構造の２
例（Ａ）（Ｂ）を示している。図１６には、実施例７と
して、骨ピース２１、２２（いずれも０．５ｍｍｔ、Ｓ
ＵＳ６３１板材）を重ね合わせたうえ、その斜線で示さ
れる鋳ぐるみ代２ａを、先に説明した場合と同様に、タ
イヤ金型３およびラグなど形成用骨３１に、鋳ぐるんだ
状態が示されている。(Embodiment 7) In FIG. 15, a front view is shown on the left side, and a cross-sectional view on line xx is shown on the right side. The bone pieces 21 and 22 are used. Bone structure 2 for regulating cutting position
Examples (A) and (B) are shown. FIG. 16 shows bone pieces 21 and 22 (0.5 mmt, S
US631 sheet material) is overlapped, and the cast-in allowance 2a indicated by the diagonal lines is cast in the tire mold 3 and the forming bone 31 such as a lug in the same manner as described above. ing.

【００３１】[0031]

【発明の効果】本発明のサイプ形成用骨およびタイヤ金
型の製造方法は、以上に説明したように構成されている
ので、そのサイプ形成用骨は、肉厚方向の寸法制御が容
易であり、製作工数も少なく比較的簡単に組み立てるこ
とができる。また、そのタイヤ金型の製造方法は、前記
好ましいサイプ形成用骨を金型本体に強固に固定でき、
寸法精度の高いタイヤ金型を得ることができ、結果寸法
精度に優れた、複雑な形状のサイプを低コストにタイヤ
に付与できるという優れた効果がある。よって本発明は
従来の問題点を解消したサイプ形成用骨およびタイヤ金
型の製造方法として、その工業的価値は極めて大なるも
のがある。The method for manufacturing a sipe-forming bone and a tire mold according to the present invention is configured as described above, so that the sipe-forming bone can be easily dimensionally controlled in the thickness direction. Since the number of manufacturing steps is small, it can be assembled relatively easily. In addition, the method of manufacturing a tire mold can firmly fix the preferable sipe-forming bone to the mold body,
It is possible to obtain a tire mold with high dimensional accuracy, and as a result, there is an excellent effect that a sipe having a complicated shape and excellent in dimensional accuracy can be provided to a tire at low cost. Therefore, the present invention has an extremely large industrial value as a method for manufacturing a sipe-forming bone and a tire mold which has solved the conventional problems.

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

【図１】本発明のサイプ形成用骨を示す要部斜視図。FIG. 1 is a perspective view of an essential part showing a sipe-forming bone of the present invention.

【図２】本発明のサイプ形成用骨の事例を示す要部断面
図。FIG. 2 is a sectional view of a main part showing an example of a sipe-forming bone of the present invention.

【図３】本発明の骨ピースの仮止めの事例を示す要部斜
視図。FIG. 3 is a perspective view of an essential part showing an example of temporary fixing of a bone piece of the present invention.

【図４】実施例１の３事例を示す斜視図。FIG. 4 is a perspective view showing three examples of the first embodiment.

【図５】実施例１の他の形態を示す斜視図。FIG. 5 is a perspective view showing another embodiment of the first embodiment.

【図６】実施例２の１事例を示す斜視図。FIG. 6 is a perspective view showing one example of the second embodiment.

【図７】実施例２の他の形態を示す斜視図。FIG. 7 is a perspective view showing another embodiment of the second embodiment.

【図８】実施例３の２事例を示す斜視図。FIG. 8 is a perspective view showing two examples of the third embodiment.

【図９】実施例３の他の形態を示す斜視図。FIG. 9 is a perspective view showing another embodiment of the third embodiment.

【図１０】実施例４の２事例を示す斜視図。FIG. 10 is a perspective view showing two examples of the fourth embodiment.

【図１１】実施例４の他の形態を示す斜視図。FIG. 11 is a perspective view showing another embodiment of the fourth embodiment.

【図１２】実施例５の３事例を示す斜視図。FIG. 12 is a perspective view showing three examples of the fifth embodiment.

【図１３】実施例６を示す正面図、側面断面図。FIG. 13 is a front view and a side sectional view showing the sixth embodiment.

【図１４】実施例６の他の形態を示す斜視図。FIG. 14 is a perspective view showing another embodiment of the sixth embodiment.

【図１５】実施例７を示す正面図、側面断面図。FIGS. 15A and 15B are a front view and a side sectional view showing the seventh embodiment.

【図１６】実施例７の他の形態を示す斜視図。FIG. 16 is a perspective view showing another embodiment of the seventh embodiment.

【図１７】従来のサイプ形成用骨の事例を示す斜視図。FIG. 17 is a perspective view showing an example of a conventional sipe-forming bone.

【符号の説明】[Explanation of symbols]

２ サイプ形成用骨、２ａ 鋳ぐるみ代、２１、２２、
２３ 骨ピース、３ タイヤ金型、４ ロッキングホー
ル、５ ベントホール、６ クリップ、７ ワイヤピ
ン。2 Bone for sipe formation, 2a Cast-in allowance, 21, 22,
23 Bone pieces, 3 tire molds, 4 locking holes, 5 vent holes, 6 clips, 7 wire pins.

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】タイヤにサイプを形成するためタイヤ金型
に設けられる骨であって、複数の骨ピースを重ね合わせ
て組み立てられ、少なくともその脚部に前記タイヤ金型
に埋設される鋳ぐるみ代を設定したことを特徴とするサ
イプ形成用骨。1. A bone provided in a tire mold for forming a sipe in a tire, wherein a plurality of bone pieces are overlapped and assembled, and at least a leg thereof has a stuffing allowance embedded in the tire mold. A bone for sipe formation, characterized in that: 【請求項２】原型から作成した鋳型に、アルミニウム合
金の溶湯を注入してタイヤ金型を鋳造する方法におい
て、複数の骨ピースを重ね合わせて、前記鋳型に配置
し、前記鋳造と同時に、前記骨ピースの少なくとも重ね
合わせた脚部の鋳ぐるみ代を鋳ぐるむことによりタイヤ
金型に固定し、サイプ形成用骨部に形成することを特徴
とするタイヤ金型の製造方法。2. A method for casting a tire mold by injecting a molten metal of an aluminum alloy into a mold prepared from a prototype, wherein a plurality of bone pieces are superimposed, arranged on the mold, and simultaneously with the casting, A method of manufacturing a tire mold, characterized in that at least a portion of a bone piece on which a bone piece is overlapped is fixed to a tire mold by casting, and formed into a sipe forming bone part.
JP27371198A 1998-09-28 1998-09-28 Sipe forming skeleton and production of tire mold Pending JP2000102925A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27371198A JP2000102925A (en) 1998-09-28 1998-09-28 Sipe forming skeleton and production of tire mold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27371198A JP2000102925A (en) 1998-09-28 1998-09-28 Sipe forming skeleton and production of tire mold

Publications (1)

Publication Number Publication Date
JP2000102925A true JP2000102925A (en) 2000-04-11

Family

ID=17531502

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Link
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WO2008066527A1 (en) * 2006-11-29 2008-06-05 Societe De Technologie Michelin Mold having elements for sole side of tread, method of using mold and tread
US7530802B2 (en) * 2000-11-13 2009-05-12 Michelin Recherche Et Technique S.A. Molding element for a mould for molding a cutout in a tire tread
WO2010039148A1 (en) * 2008-10-03 2010-04-08 Societe De Technologie Michelin Undulated progressive tire mold element
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US8127811B2 (en) 2007-04-16 2012-03-06 Toyo Tire & Rubber Co., Ltd. Sipe blade and tire molded using the same
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US8307867B2 (en) * 2008-10-03 2012-11-13 Toyo Tire & Rubber Co., Ltd. Pneumatic tire with tread including sipe having wide portions located alternately on both side walls
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US8393366B2 (en) * 2006-03-08 2013-03-12 Michelin Recherche Et Technique S.A. Tread sipe comprising locking parts
US8640751B2 (en) * 2007-09-26 2014-02-04 Toyo Tire & Rubber Co., Ltd. Pneumatic tire with tread having sipes
WO2016054278A1 (en) * 2014-09-30 2016-04-07 Compagnie Generale Des Etablissements Michelin A tire tread comprising variable thickness sipes with multiple areas of reduced thickness
US20160185162A1 (en) * 2014-12-25 2016-06-30 Toyo Tire & Rubber Co., Ltd. Pneumatic tire and molding die thereof
FR3053920A1 (en) * 2016-07-18 2018-01-19 Compagnie Generale Des Etablissements Michelin INSERT TEXTURE FOR FITTING A MOLD FOR THE VULCANIZATION OF A TIRE
WO2018062507A3 (en) * 2016-09-29 2018-05-17 Compagnie Generale Des Etablissements Michelin Molding element for manufacturing a noise reducing tread
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WO2020136015A1 (en) * 2018-12-26 2020-07-02 Compagnie Generale Des Etablissements Michelin Method for manufacturing a mould element for a tyre mould
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US11186054B2 (en) 2015-09-30 2021-11-30 Compagnie Generale Des Etablissements Michelin Variable thickness sipes
US11338618B2 (en) 2015-09-30 2022-05-24 Compagnie Generale Des Etablissements Michelin Egg crate sidewall features for sipes
WO2022163060A1 (en) * 2021-01-27 2022-08-04 株式会社ブリヂストン Sipe blade and tire mold
WO2022172535A1 (en) * 2021-02-09 2022-08-18 株式会社ブリヂストン Sipe blade, tire molding mold, and tire manufacturing method
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JP2005153870A (en) * 2003-11-20 2005-06-16 Goodyear Tire & Rubber Co:The Three-dimensional sipe for tread
US7143799B2 (en) * 2003-11-20 2006-12-05 The Goodyear Tire & Rubber Company Three-dimensional sipes for treads
US8393366B2 (en) * 2006-03-08 2013-03-12 Michelin Recherche Et Technique S.A. Tread sipe comprising locking parts
WO2008066527A1 (en) * 2006-11-29 2008-06-05 Societe De Technologie Michelin Mold having elements for sole side of tread, method of using mold and tread
US8277589B2 (en) 2006-11-29 2012-10-02 Michelin Recherche Et Technique S.A. Method of retreading a tire
US8127811B2 (en) 2007-04-16 2012-03-06 Toyo Tire & Rubber Co., Ltd. Sipe blade and tire molded using the same
KR101239927B1 (en) 2007-07-20 2013-03-06 신닛테츠스미킨 카부시키카이샤 Hydroforming method, and hydroformed parts
US8640751B2 (en) * 2007-09-26 2014-02-04 Toyo Tire & Rubber Co., Ltd. Pneumatic tire with tread having sipes
JP2011506198A (en) * 2007-12-17 2011-03-03 ソシエテ ド テクノロジー ミシュラン Snow tire tread
JP2012504510A (en) * 2008-10-03 2012-02-23 ソシエテ ド テクノロジー ミシュラン Waveform progressive tire mold element
US8307867B2 (en) * 2008-10-03 2012-11-13 Toyo Tire & Rubber Co., Ltd. Pneumatic tire with tread including sipe having wide portions located alternately on both side walls
RU2469858C1 (en) * 2008-10-03 2012-12-20 Компани Женераль Дез Этаблиссман Мишлен Advanced wavy forming element for tyre
WO2010039148A1 (en) * 2008-10-03 2010-04-08 Societe De Technologie Michelin Undulated progressive tire mold element
EP2425952A1 (en) * 2008-12-31 2012-03-07 Société de Technologie Michelin System for changing sipe blades for molding or retreading tires
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CN102834250B (en) * 2009-06-19 2015-01-14 米其林企业总公司 Removable device for molding a flexible wall in the groove of a tire pattern
CN102834250A (en) * 2009-06-19 2012-12-19 米其林企业总公司 Removable device for molding a flexible wall in the groove of a tire pattern
WO2010146180A1 (en) * 2009-06-19 2010-12-23 Societe De Technologie Michelin Removable device for molding a flexible wall in the groove of a tire pattern
US8506275B2 (en) 2009-06-19 2013-08-13 Compagnie Generale Des Etablissements Removable device for moulding a flexible wall in the groove of a tire pattern
US8695659B2 (en) * 2009-12-02 2014-04-15 Toyo Tire & Rubber Co, Ltd. Pneumatic tire having first type sipe and second type sipe
US20110126951A1 (en) * 2009-12-02 2011-06-02 Toyo Tire & Rubber Co., Ltd. Pneumatic tire
US20110290392A1 (en) * 2010-06-01 2011-12-01 Toyo Tire & Rubber Co., Ltd. Pneumatic tire
US8561660B2 (en) * 2010-06-01 2013-10-22 Toyo Tire & Rubber Co., Ltd. Pneumatic tire
CN106852135B (en) * 2014-09-30 2019-06-14 米其林集团总公司 The tire tread of variable thickness tread groove including the region reduced with multiple thickness
WO2016054278A1 (en) * 2014-09-30 2016-04-07 Compagnie Generale Des Etablissements Michelin A tire tread comprising variable thickness sipes with multiple areas of reduced thickness
US10773556B2 (en) 2014-09-30 2020-09-15 Compagnie Generale Des Etablissements Michelin Tire tread comprising variable thickness sipes with multiple areas of reduced thickness
CN106852135A (en) * 2014-09-30 2017-06-13 米其林集团总公司 The tire tread of the variable thickness tread groove in region including reducing with multiple thickness
US20170225517A1 (en) * 2014-09-30 2017-08-10 Compagnie Generale Des Etablissements Michelin A tire tread comprising variable thickness sipes with multiple areas of reduced thickness
JP2016120859A (en) * 2014-12-25 2016-07-07 東洋ゴム工業株式会社 Pneumatic tire and molding tool therefor
US10343464B2 (en) * 2014-12-25 2019-07-09 Toyo Tire Corporation Pneumatic tire and molding die thereof
US20160185162A1 (en) * 2014-12-25 2016-06-30 Toyo Tire & Rubber Co., Ltd. Pneumatic tire and molding die thereof
US11186054B2 (en) 2015-09-30 2021-11-30 Compagnie Generale Des Etablissements Michelin Variable thickness sipes
US11338618B2 (en) 2015-09-30 2022-05-24 Compagnie Generale Des Etablissements Michelin Egg crate sidewall features for sipes
WO2018015631A1 (en) * 2016-07-18 2018-01-25 Compagnie Generale Des Etablissements Michelin Textured blade for the lining of a mold used for vulcanizing a tire
FR3053920A1 (en) * 2016-07-18 2018-01-19 Compagnie Generale Des Etablissements Michelin INSERT TEXTURE FOR FITTING A MOLD FOR THE VULCANIZATION OF A TIRE
WO2018062507A3 (en) * 2016-09-29 2018-05-17 Compagnie Generale Des Etablissements Michelin Molding element for manufacturing a noise reducing tread
CN110418708A (en) * 2017-03-31 2019-11-05 米其林集团总公司 The tire-mold with interchangeable parts with the thin slice being removably attached
CN110418708B (en) * 2017-03-31 2021-05-18 米其林集团总公司 Tire mold with interchangeable pieces having removably attached flaps
US11529782B2 (en) 2018-03-16 2022-12-20 Continental Reifen Deutschland Gmbh Rib- or fin-shaped element, profile ring segment and method for producing a profile ring segment
CN111902298A (en) * 2018-03-16 2020-11-06 大陆轮胎德国有限公司 Rib-like or fin-like element, patterned ring section and method for producing patterned ring section
CN111902298B (en) * 2018-03-16 2023-10-27 大陆轮胎德国有限公司 Rib or fin element, turn section and method for producing a turn section
WO2020136015A1 (en) * 2018-12-26 2020-07-02 Compagnie Generale Des Etablissements Michelin Method for manufacturing a mould element for a tyre mould
US11925976B2 (en) 2018-12-26 2024-03-12 Compagnie Generale Des Etablissements Michelin Method for manufacturing a mold element for a tire mold
EP3871905A1 (en) * 2020-02-28 2021-09-01 Bridgestone Americas Tire Operations, LLC Reinforced tire sipe blade
WO2022163060A1 (en) * 2021-01-27 2022-08-04 株式会社ブリヂストン Sipe blade and tire mold
WO2022172535A1 (en) * 2021-02-09 2022-08-18 株式会社ブリヂストン Sipe blade, tire molding mold, and tire manufacturing method
EP4249226A1 (en) * 2021-02-09 2023-09-27 Bridgestone Corporation Sipe blade, tire molding mold, and tire manufacturing method
EP4249226A4 (en) * 2021-02-09 2024-05-15 Bridgestone Corp Sipe blade, tire molding mold, and tire manufacturing method
WO2024049804A1 (en) * 2022-08-29 2024-03-07 Compagnie Generale Des Etablissements Michelin Undulated sipe-molding member for improved tire performance and economical mold fabrication

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