JP2009178994A - Manufacturing process of tire vulcanizing mold - Google Patents

Manufacturing process of tire vulcanizing mold Download PDF

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JP2009178994A
JP2009178994A JP2008021675A JP2008021675A JP2009178994A JP 2009178994 A JP2009178994 A JP 2009178994A JP 2008021675 A JP2008021675 A JP 2008021675A JP 2008021675 A JP2008021675 A JP 2008021675A JP 2009178994 A JP2009178994 A JP 2009178994A
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mold
sipe
gypsum
tire
forming blade
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JP5136094B2 (en
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Noboru Takada
高田　　昇
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Yokohama Rubber Co Ltd
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Yokohama Rubber Co Ltd
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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)
    • B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
    • B29D30/0606—Vulcanising moulds not integral with vulcanising presses

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing process of a tire vulcanizing mold by which a tire vulcanizing mold equipped with a sipe forming blade of a complicated shape can be easily manufactured. <P>SOLUTION: A piece 5 for a sipe in which one end part 6a of the sipe forming blade is buried in a gypsum casting mold 7 and another end part 6b thereof is protruded from the gypsum casting mold 7, is produced in advance. An aluminum material A is cast into a cavity between an upper metallic mold 1 and a lower metallic mold 2 in a state where the gypsum casting mold 7 is fitted into a piece fixing hole 4 of the upper metallic mold 1 to form a tire molding surface of a predetermined shape. After solidified aluminum material A together with the gypsum casting mold 7 is released from the upper metallic mold 1 and the lower metallic mold 2, the gypsum casting mold 7 is removed by spraying water to expose the one end part 6a of the sipe forming blade to the tire molding surface. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、タイヤ加硫用モールドの製造方法に関し、さらに詳しくは、複雑な形状のサイプ形成ブレードを設けたタイヤ加硫用モールドを、容易に製造することできるタイヤ加硫用モールドの製造方法に関するものである。   The present invention relates to a method for manufacturing a tire vulcanization mold, and more particularly, to a method for manufacturing a tire vulcanization mold that can easily manufacture a tire vulcanization mold provided with a sipe forming blade having a complicated shape. Is.

タイヤのトレッドに形成されるブロック等には、ブロックの剛性を適度にするためや排水性を向上させるために、サイプと呼ばれる細溝が形成されることがある。タイヤにサイプを形成する場合、タイヤ加硫用モールドには、サイプ形成ブレードがタイヤ成形面に突出するように設けられる。   A narrow groove called a sipe may be formed in a block or the like formed on a tread of a tire in order to make the rigidity of the block moderate or to improve drainage. When a sipe is formed on a tire, a sipe forming blade is provided on the tire vulcanization mold so as to protrude from the tire molding surface.

近年、タイヤに対する要求性能から複雑な形状のサイプが必要になることがあり、これに伴い、サイプ形成ブレードも複雑な形状、例えば、いわゆる３次元形状、アンダーカット形状等になることもある。このようなサイプ形成ブレードを設けたタイヤ加硫用モールドを製造する方法は種々提案されている（例えば、特許文献１参照）。しかしながら、サイプ形成ブレードが３次元形状、アンダーカット形状になる場合には、ダイキャスト金型の対応部分を分割構造にしたり、引き抜き中子を用いた構造にする等の細工を施すため複雑な構造になる。これに伴い、タイヤ加硫用モールドの製造も複雑になり容易に製造することが困難になるという問題があった。
特開平８−２２９９５６号公報 In recent years, a sipe having a complicated shape may be required due to performance requirements for a tire, and accordingly, a sipe forming blade may also have a complicated shape, for example, a so-called three-dimensional shape or an undercut shape. Various methods for manufacturing a mold for tire vulcanization provided with such a sipe forming blade have been proposed (see, for example, Patent Document 1). However, when the sipe forming blade has a three-dimensional shape or an undercut shape, a complicated structure is required because the corresponding part of the die-casting die is divided or a structure using a drawing core is applied. become. As a result, the production of the tire vulcanization mold becomes complicated, which makes it difficult to produce the mold easily.
JP-A-8-229956

本発明の目的は、複雑な形状のサイプ形成ブレードを設けたタイヤ加硫用モールドを、容易に製造することできるタイヤ加硫用モールドの製造方法を提供することにある。   An object of the present invention is to provide a method for producing a tire vulcanization mold that can easily produce a tire vulcanization mold provided with a sipe forming blade having a complicated shape.

上記目的を達成するため本発明のタイヤ加硫用モールドの製造方法は、ダイキャスト金型のキャビティにアルミニウム材料を鋳込んで所定形状のタイヤ成形面を形成し、そのタイヤ成形面にサイプ形成ブレードを突設するタイヤ加硫用モールドの製造方法において、サイプ形成ブレードの一方端部を石膏を含有した石膏鋳型に埋設し、他方端部を石膏鋳型から突出させたサイプ用ピースを予め作製しておき、前記ダイキャスト金型に設けたピース固定穴に、前記サイプ用ピースの石膏鋳型を嵌合させて、サイプ形成ブレードの他方端部をキャビティに突出させた状態にして、キャビティにアルミニウム材料を鋳込んで所定形状のタイヤ成形面を形成するとともに、サイプ形成ブレードの他方端部をアルミニウム材料に埋入させ、鋳込んだアルミニウム材料が固化した後に、前記石膏鋳型を除去することにより、一方端部を露出させてサイプ形成ブレードをタイヤ成形面に突設することを特徴とするものである。   In order to achieve the above object, a tire vulcanizing mold manufacturing method according to the present invention includes forming a tire molding surface having a predetermined shape by casting an aluminum material into a cavity of a die-cast mold, and forming a sipe forming blade on the tire molding surface. In the method for manufacturing a tire vulcanizing mold, a sipe piece is prepared in advance by embedding one end of a sipe forming blade in a gypsum mold containing gypsum and projecting the other end from a gypsum mold. In addition, a gypsum mold of the sipe piece is fitted into a piece fixing hole provided in the die cast mold so that the other end of the sipe forming blade protrudes into the cavity, and an aluminum material is put into the cavity. Casting to form a tire molding surface with a predetermined shape, the other end of the sipe forming blade is embedded in an aluminum material, After the iodonium material is solidified by removing the plaster mold is while those exposed ends, characterized in that projecting the sipe forming blade in a tire molding surface.

ここで、例えば、前記石膏鋳型を形成する際に、前記サイプ形成ブレードの一方端部に離型剤を塗布してから石膏鋳型に埋設する。また、前記石膏鋳型を、石膏を補強する補強材を含有させて形成することもできる。   Here, for example, when forming the gypsum mold, a mold release agent is applied to one end of the sipe forming blade and then embedded in the gypsum mold. The gypsum mold may be formed by containing a reinforcing material that reinforces gypsum.

本発明のタイヤ加硫用モールドの製造方法によれば、サイプ形成ブレードの一方端部を石膏を含有した石膏鋳型に埋設し、他方端部を石膏鋳型から突出させたサイプ用ピースを予め作製しておくことにより、サイプ形成ブレードの複雑な形状部分を単純な形状の石膏鋳型に埋めることができる。これにより、ダイキャスト金型に設けた単純形状のピース固定穴に、サイプ用ピースの石膏鋳型を嵌合させて、サイプ形成ブレードの他方端部をキャビティに突出させた状態にして、キャビティにアルミニウム材料を鋳込んで所定形状のタイヤ成形面を形成するとともに、サイプ形成ブレードの他方端部をアルミニウム材料に埋入させ、鋳込んだアルミニウム材料が固化した後に、石膏鋳型を除去する工程を行なうことによりサイプ形成ブレードを、複雑な形状の一方端部を露出させてタイヤ加硫用モールドのタイヤ成形面に突設することが可能になる。   According to the method for manufacturing a mold for vulcanizing a tire of the present invention, a sipe piece in which one end of a sipe forming blade is embedded in a gypsum mold containing gypsum and the other end is projected from a gypsum mold is prepared in advance. Thus, the complicated shape portion of the sipe forming blade can be embedded in a gypsum mold having a simple shape. As a result, the gypsum mold of the sipe piece is fitted into the simple-shaped piece fixing hole provided in the die-casting mold so that the other end of the sipe forming blade protrudes into the cavity, and the cavity is made of aluminum. Casting the material to form a tire molding surface of a predetermined shape, and embedding the other end of the sipe forming blade in the aluminum material, and after the cast aluminum material is solidified, performing a step of removing the gypsum mold Thus, the sipe forming blade can be protruded from the tire molding surface of the tire vulcanizing mold with one end portion of the complicated shape exposed.

これにより、タイヤ加硫用モールドに複雑な形状のサイプ形成ブレードを設ける場合であっても、ダイキャスト金型を分割構造にしたり、引き抜き中子を設ける等の複雑な構造にすることなく、サイプ形成ブレードをタイヤ加硫用モールドのタイヤ成形面に容易に突設することができる。   As a result, even when a sipe forming blade having a complicated shape is provided in the tire vulcanization mold, the sipe is formed without making the die cast mold into a divided structure or a complicated structure such as providing a drawing core. The forming blade can be easily protruded from the tire molding surface of the tire vulcanization mold.

以下、本発明のタイヤ加硫用モールドの製造方法を図に示した実施形態に基づいて説明する。   Hereinafter, the manufacturing method of the mold for tire vulcanization of the present invention is explained based on the embodiment shown in the figure.

図１、２に例示するように、本発明により製造されるタイヤ加硫用モールド８は、アルミニウム材等により形成されており、表面が凹凸等を有する所定形状のタイヤ成形面８ａになっている。タイヤ成形面８ａの凸部は製造するタイヤのトレッド面の凹部を成形する。   As illustrated in FIGS. 1 and 2, the tire vulcanization mold 8 manufactured according to the present invention is formed of an aluminum material or the like, and the surface is a tire molding surface 8 a having a predetermined shape having irregularities and the like. . The convex part of the tire molding surface 8a forms the concave part of the tread surface of the tire to be manufactured.

タイヤ成形面８ａには、サイプ形成ブレード６が突設されている。サイプ形成ブレード６は、ステンレス鋼等の薄板により形成され、一方端部６ａは複雑な形状、例えば、いわゆる３次元形状やアンダーカット形状に加工されている。サイプ形成ブレード６の他方端部６ｂは、タイヤ加硫用モールド８に埋設されている。タイヤを製造する際には、このサイプ形成ブレード６の一方端部６ａがサイプ形成部となって、タイヤのトレッド面（ブロック）のサイプを形成する。   A sipe forming blade 6 projects from the tire molding surface 8a. The sipe forming blade 6 is formed of a thin plate such as stainless steel, and the one end portion 6a is processed into a complicated shape, for example, a so-called three-dimensional shape or an undercut shape. The other end 6 b of the sipe forming blade 6 is embedded in the tire vulcanization mold 8. When manufacturing a tire, one end portion 6a of the sipe forming blade 6 serves as a sipe forming portion to form a sipe of a tread surface (block) of the tire.

このタイヤ加硫用モールド８は、ダイキャストにより製造されるが、本発明では、図３に例示するようにサイプ形成ブレード６の一方端部６ａを、石膏を含有した石膏鋳型７に埋設し、他方端部６ｂを石膏鋳型７から突出させたサイプ用ピース５を予め作製しておく。後述するように、石膏鋳型７は鋳造後に、固化したアルミニウム材料Ａと共に上金型１から脱型させて、最終的にはサイプ形成ブレード６（一方端部６ａ）から分離させて除去される。そのため、石膏鋳型７は、上金型１から抜き取り易くするように、抜きテーパを有する断面形状に形成され、この実施形態では断面形状が台形になっている。   The tire vulcanization mold 8 is manufactured by die casting. In the present invention, as illustrated in FIG. 3, one end portion 6a of the sipe forming blade 6 is embedded in a gypsum mold 7 containing gypsum, A sipe piece 5 having the other end 6b protruding from the gypsum mold 7 is prepared in advance. As will be described later, the gypsum mold 7 is removed from the upper mold 1 together with the solidified aluminum material A after casting, and finally separated from the sipe forming blade 6 (one end 6a) and removed. Therefore, the gypsum mold 7 is formed in a cross-sectional shape having a punching taper so that it can be easily pulled out from the upper mold 1. In this embodiment, the cross-sectional shape is trapezoidal.

石膏鋳型７は、例えば、半水石膏（硫酸カルシウム半水塩）と熱硬化性樹脂を基材とする。熱硬化性樹脂としては、メラミン樹脂、フェノール樹脂等を例示できる。半水石膏の含有率は、例えば６０ｗｔ％〜９５ｗｔ％程度とし、熱硬化性樹脂の含有率は、半水石膏の含有率に応じて５ｗｔ％〜２０ｗｔ％程度とする。或いは、半水石膏と石英を基材にした石膏鋳型７を用いることもできる。   The gypsum mold 7 is made of, for example, hemihydrate gypsum (calcium sulfate hemihydrate) and a thermosetting resin. Examples of the thermosetting resin include melamine resin and phenol resin. The content of hemihydrate gypsum is, for example, about 60 wt% to 95 wt%, and the content of the thermosetting resin is about 5 wt% to 20 wt% depending on the content of hemihydrate gypsum. Alternatively, a gypsum mold 7 based on hemihydrate gypsum and quartz can also be used.

組み付けられるダイキャスト金型１、２（以下、上金型１、下金型２という）の下金型２に対向する上金型１の表面は、所定形状に形成されるとともに、ピース固定穴４が設けられている。このピース固定穴４は、サイプ用ピース５の石膏鋳型７が嵌合するように、石膏鋳型７の外形とほぼ同じ形状になっている。石膏鋳型７およびピース固定穴４は、できるだけ加工が容易な単純形状にすることが好ましい。このピース用固定穴４に石膏鋳型７を嵌合させることにより、上金型１にサイプ用ピース５を固定する。   The surface of the upper die 1 facing the lower die 2 of the die-casting die 1, 2 (hereinafter referred to as the upper die 1 and the lower die 2) to be assembled is formed in a predetermined shape, and a piece fixing hole 4 is provided. The piece fixing hole 4 has substantially the same shape as the gypsum mold 7 so that the gypsum mold 7 of the sipe piece 5 can be fitted. It is preferable that the plaster mold 7 and the piece fixing hole 4 have a simple shape that can be processed as easily as possible. The sipe piece 5 is fixed to the upper mold 1 by fitting the gypsum mold 7 into the piece fixing hole 4.

次いで、図４に例示するように、サイプ用ピース５を固定した上金型１と、下金型２とを組み付けて型締めする。組み付けた上金型１と下金型２との間の空間がキャビティ３となる。サイプ形成ブレード６の他方端部６ｂはキャビティ３に突出した状態になる。   Next, as illustrated in FIG. 4, the upper mold 1 to which the sipe piece 5 is fixed and the lower mold 2 are assembled and clamped. A space between the assembled upper mold 1 and lower mold 2 is a cavity 3. The other end 6 b of the sipe forming blade 6 is projected into the cavity 3.

次いで、図５に例示するように、所定の充填圧力で溶融したアルミニウム材料Ａをキャビティ３に鋳込む。これにより、鋳込まれたアルミニウム材料Ａは、上金型１の表面に沿った所定形状に形成されるとともに、キャビティ３に突出していたサイプ形成ブレード６の他方端部６ｂは、アルミニウム材料Ａに埋入した状態になる。鋳込んだアルミニウム材料Ａが冷却して固化すると、サイプ形成ブレード６の他方端部６ｂは、固化したアルミニウム材料Ａと一体化して固定された状態になる。   Next, as illustrated in FIG. 5, the aluminum material A melted at a predetermined filling pressure is cast into the cavity 3. Thus, the cast aluminum material A is formed in a predetermined shape along the surface of the upper mold 1, and the other end portion 6 b of the sipe forming blade 6 protruding into the cavity 3 is formed on the aluminum material A. It will be in the embedded state. When the cast aluminum material A is cooled and solidified, the other end portion 6b of the sipe forming blade 6 is integrated and fixed with the solidified aluminum material A.

アルミニウム材料Ａの充填圧力は、例えば５０ＭＰａ以下に設定するが、設定された充填圧力によって石膏鋳型７が破壊されることを防止するために、補強材を含有させて石膏鋳型７を形成することが好ましい。補強材としては、ガラス繊維や樹脂繊維等を例示でき、繊維長は２ｍｍ〜５ｍｍ程度にする。   The filling pressure of the aluminum material A is set to, for example, 50 MPa or less. In order to prevent the gypsum mold 7 from being destroyed by the set filling pressure, the gypsum mold 7 may be formed by containing a reinforcing material. preferable. Examples of the reinforcing material include glass fibers and resin fibers, and the fiber length is about 2 mm to 5 mm.

次いで、上金型１と下金型２とを型開きして、図６、７に例示するように、固化したアルミニウム材料Ａを脱型させる。この際に、石膏鋳型７を上金型１のピース用固定穴４から抜き取るようにして、サイプ用ピース５を固化したアルミニウム材料Ａと共に脱型させる。固化したアルミニウム材料Ａは、表面に所定形状のタイヤ成形面８ａを有するタイヤ加硫モールド８となる。このタイヤ成形面８ａには、サイプ形成ブレード６の一方端部６ａを埋設した石膏鋳型７が突出した状態になる。   Next, the upper mold 1 and the lower mold 2 are opened, and the solidified aluminum material A is demolded as illustrated in FIGS. At this time, the gypsum mold 7 is removed from the piece fixing hole 4 of the upper mold 1 and the sipe piece 5 is demolded together with the solidified aluminum material A. The solidified aluminum material A becomes a tire vulcanization mold 8 having a predetermined surface of the tire molding surface 8a. On the tire molding surface 8a, the gypsum mold 7 in which one end portion 6a of the sipe forming blade 6 is embedded protrudes.

ここで、石膏鋳型７を、サイプ形成ブレード６の一方端部６ａから分離させるように除去する。例えば、水噴射ノズル９から水Ｗを吹き付けて石膏鋳型７を除去する。これにより、サイプ形成ブレード６の一方端部６ａが露出した状態になって、図１、２に例示したタイヤ加硫用モールド８が製造される。吹き付ける水Ｗの水圧は任意に設定できるが、例えば、２０ＭＰａ程度に設定する。   Here, the gypsum mold 7 is removed so as to be separated from the one end 6 a of the sipe forming blade 6. For example, water W is sprayed from the water injection nozzle 9 to remove the gypsum mold 7. Thereby, the one end portion 6a of the sipe forming blade 6 is exposed, and the tire vulcanization mold 8 illustrated in FIGS. 1 and 2 is manufactured. Although the water pressure of the water W to spray can be set arbitrarily, it sets to about 20 MPa, for example.

石膏鋳型７とサイプ形成ブレード６の一方端部６ａとを分離させ易くするために、サイプ用ピース５を作製する際に、一方端部６ａに離型剤を塗布してから石膏鋳型７に埋設するとよい。離型剤としては、蝋と有機溶剤とを含有成分にしたものを例示できる。これによれば、石膏鋳型７が乾燥する際に蝋が気化することにより、石膏鋳型７とサイプ形成ブレード６の一方端部６ａとの間に微細な隙間が形成されるので、比較的小さな衝撃等によって、石膏鋳型７とサイプ形成ブレード６の一方端部６ａとを分離させることが可能になる。また、キャビティ３にアルミニウム材料Ａを鋳込む前に、アルミニウム材料Ａに接触する石膏鋳型７の部分に黒鉛を塗布しておくと、焼付きを防止することができる。   In order to make it easy to separate the gypsum mold 7 and the one end 6a of the sipe forming blade 6, when producing the sipe piece 5, a mold release agent is applied to the one end 6a and then embedded in the gypsum mold 7. Good. Examples of the release agent include those containing wax and an organic solvent as components. According to this, since the wax is vaporized when the gypsum mold 7 is dried, a fine gap is formed between the gypsum mold 7 and the one end portion 6a of the sipe forming blade 6. For example, the plaster mold 7 and the one end 6a of the sipe forming blade 6 can be separated. Further, if graphite is applied to the portion of the gypsum mold 7 that contacts the aluminum material A before the aluminum material A is cast into the cavity 3, seizure can be prevented.

以上説明したように本発明では、サイプ形成ブレード６の一方端部６ａを石膏鋳型７に埋設し、他方端部６ｂを石膏鋳型７から突出させたサイプ用ピース５を用いることにより、サイプ形成ブレード６の複雑な形状部分を単純な形状の石膏鋳型７に埋めることができる。そのため、上金型１には単純形状のピース固定穴４を設けるだけで済む。したがって、３次元形状、アンダーカット形状等の複雑な形状のサイプ形成ブレード６を、タイヤ加硫用モールド８に設ける場合であっても、上金型１を分割構造にしたり、引き抜き中子を設ける等の複雑な構造にする必要がなく、容易にタイヤ加硫用モールド８を製造することができる。   As described above, in the present invention, the sipe forming blade is used by embedding one end 6a of the sipe forming blade 6 in the gypsum mold 7 and using the sipe piece 5 having the other end 6b protruding from the gypsum mold 7. 6 complicated shape portions can be embedded in a simple-shaped gypsum mold 7. Therefore, it is only necessary to provide the upper die 1 with a piece fixing hole 4 having a simple shape. Therefore, even when the sipe forming blade 6 having a complicated shape such as a three-dimensional shape or an undercut shape is provided in the tire vulcanizing mold 8, the upper die 1 is divided or a drawing core is provided. Therefore, the tire vulcanization mold 8 can be easily manufactured.

本発明により製造したタイヤ加硫用モールドを例示する平面図である。It is a top view which illustrates the mold for tire vulcanization manufactured by the present invention. 図１の縦断面図である。It is a longitudinal cross-sectional view of FIG. 本発明の最初の工程を例示する縦断面図である。It is a longitudinal cross-sectional view which illustrates the first process of this invention. 図３の次の工程を例示する縦断面図である。FIG. 4 is a longitudinal sectional view illustrating the next process of FIG. 3. 図４の次の工程を例示する縦断面図である。FIG. 5 is a longitudinal sectional view illustrating the next process of FIG. 4. 図５の次の工程を例示する縦断面図である。FIG. 6 is a longitudinal sectional view illustrating the next process of FIG. 5. 図６の平面図である。FIG. 7 is a plan view of FIG. 6.

符号の説明Explanation of symbols

１ ダイキャスト金型（上金型）
２ ダイキャスト金型（下金型）
３ キャビティ
４ ピース固定穴
５ サイプ用ピース
６ サイプ形成ブレード
６ａ 一方端部（サイプ形成部）
６ｂ 他方端部
７ 石膏鋳型
８ タイヤ加硫用モールド
８ａ タイヤ成形面
９ 水噴射ノズル
Ａ アルミニウム材料 1 Die-cast mold (upper mold)
2 Die-cast mold (lower mold)
3 Cavity 4 Piece fixing hole 5 Sipe piece 6 Sipe forming blade 6a One end (sipe forming portion)
6b Other end 7 Gypsum mold 8 Tire vulcanization mold 8a Tire molding surface 9 Water injection nozzle A Aluminum material

Claims (3)

ダイキャスト金型のキャビティにアルミニウム材料を鋳込んで所定形状のタイヤ成形面を形成し、そのタイヤ成形面にサイプ形成ブレードを突設するタイヤ加硫用モールドの製造方法において、サイプ形成ブレードの一方端部を石膏を含有した石膏鋳型に埋設し、他方端部を石膏鋳型から突出させたサイプ用ピースを予め作製しておき、前記ダイキャスト金型に設けたピース固定穴に、前記サイプ用ピースの石膏鋳型を嵌合させて、サイプ形成ブレードの他方端部をキャビティに突出させた状態にして、キャビティにアルミニウム材料を鋳込んで所定形状のタイヤ成形面を形成するとともに、サイプ形成ブレードの他方端部をアルミニウム材料に埋入させ、鋳込んだアルミニウム材料が固化した後に、前記石膏鋳型を除去することにより、一方端部を露出させてサイプ形成ブレードをタイヤ成形面に突設するタイヤ加硫用モールドの製造方法。   In a manufacturing method of a tire vulcanization mold in which an aluminum material is cast into a cavity of a die cast mold to form a tire molding surface having a predetermined shape, and a sipe forming blade is projected on the tire molding surface, one of the sipe forming blades A sipe piece with an end embedded in a gypsum mold containing gypsum and the other end protruded from the gypsum mold is prepared in advance, and the sipe piece is inserted into a piece fixing hole provided in the die cast mold. The other end of the sipe forming blade is projected into the cavity, and an aluminum material is cast into the cavity to form a tire molding surface having a predetermined shape. Ends are embedded in an aluminum material, and after the cast aluminum material is solidified, the gypsum mold is removed. Method for producing a tire vulcanizing mold which protrude to expose the end portion of the sipe forming blade in a tire molding surface. 前記石膏鋳型を形成する際に、前記サイプ形成ブレードの一方端部に離型剤を塗布してから石膏鋳型に埋設するようにした請求項１に記載のタイヤ加硫用モールドの製造方法。   The method for manufacturing a tire vulcanization mold according to claim 1, wherein when forming the gypsum mold, a mold release agent is applied to one end of the sipe forming blade and then embedded in the gypsum mold. 前記石膏鋳型を、石膏を補強する補強材を含有させて形成する請求項１または２に記載のタイヤ加硫用モールドの製造方法。   The method for producing a mold for tire vulcanization according to claim 1 or 2, wherein the gypsum mold is formed by including a reinforcing material for reinforcing gypsum.
JP2008021675A 2008-01-31 2008-01-31 Manufacturing method of tire vulcanization mold Expired - Fee Related JP5136094B2 (en)

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KR101168926B1 (en) * 2009-11-23 2012-08-02 신성화 Pottery type mold for manufacturing shoe sole
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JP2015040861A (en) * 2013-08-20 2015-03-02 株式会社エビスサンプル Manufacturing method of sample product, and manufacturing method of mold

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