JPS59145130A - Preparation of cast tire - Google Patents
Preparation of cast tireInfo
- Publication number
- JPS59145130A JPS59145130A JP58019107A JP1910783A JPS59145130A JP S59145130 A JPS59145130 A JP S59145130A JP 58019107 A JP58019107 A JP 58019107A JP 1910783 A JP1910783 A JP 1910783A JP S59145130 A JPS59145130 A JP S59145130A
- Authority
- JP
- Japan
- Prior art keywords
- tire
- tire body
- bead core
- bead
- groove
- 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.)
- Granted
Links
- 239000011324 bead Substances 0.000 claims abstract description 42
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 230000006698 induction Effects 0.000 claims abstract description 8
- 229920002725 thermoplastic elastomer Polymers 0.000 claims abstract description 7
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 5
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 3
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000007769 metal material Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 10
- 239000012778 molding material Substances 0.000 abstract description 6
- 238000005266 casting Methods 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 abstract description 3
- 238000003466 welding Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract 1
- 229920001971 elastomer Polymers 0.000 description 2
- 239000003302 ferromagnetic material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006124 polyolefin elastomer Polymers 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/04—Bead cores
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tyre Moulding (AREA)
- Tires In General (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、自動四輪車、自動二輪車、軽車輪、農耕車
輪、レジャー用車輪等に使用することのできる注型タイ
ヤに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cast tire that can be used for four-wheeled motor vehicles, motorcycles, light wheels, agricultural wheels, leisure wheels, and the like.
熱可塑性エラストマー、熱可塑性樹脂等の成形材料を用
いて成形した注型タイ、ヤが使用されている。このよう
な注型クィヤに１個または２個以上のビードコアを入れ
る方法として、（ｉ）タイヤ本一体の成形時に同時に埋
設する方法、（ｉｉ）タイヤ本体の成形時にビード部に
溝状凹部を形成しておき、タイヤ本体の成形後にこの溝
状凹部にビードコアを嵌め込む方法、の２通りの方法が
従来採用されてきた。Cast tires and tires molded using molding materials such as thermoplastic elastomers and thermoplastic resins are used. Methods of inserting one or more bead cores into such a cast-molded clay are (i) embedding them at the same time when the tire body is molded, and (ii) forming groove-like recesses in the bead portion when molding the tire body. Conventionally, two methods have been adopted: a method in which a bead core is fitted into this groove-like recess after the tire body is molded.
しかしながら、上記（ｉ）の方法では一注型時の注入圧
力に耐えられるようにビードコアをピン等で強固番こ保
持する必要があるので、製品にピン跡等が残ることにな
り好ましくない。また、上記（ｉｉ）の方法では、ビー
ドコアを確実に保持するため、ビードコアと溝状凹部と
の嵌合を厳しくする必要があるが、最適な嵌合状態を得
ることは実際上困難であり、ビードコアによってビード
部が損傷することか多かった。However, in the above method (i), it is necessary to firmly hold the bead core with a pin or the like so as to withstand the injection pressure during one-time molding, which is undesirable because it leaves pin marks on the product. In addition, in the method (ii) above, in order to securely hold the bead core, it is necessary to tighten the fit between the bead core and the groove-shaped recess, but it is actually difficult to obtain an optimal fitted state. The bead core often caused damage to the bead.
この発明は、熱可塑性エラストマーまたは熱可塑性樹脂
を成形材料として用いた注型タイヤにおいて、ビードコ
アをうまく埋設することができるような注型タイヤの製
法を提供することを目的になされたもので、外に開口す
る溝状凹部をビード部に設けたタイヤ本体を熱可塑性エ
ラストマーまたは熱可塑性樹脂を用いて注型成形し、こ
の溝状四部に強磁性を有する金属材料でっ（られたビー
ドコアを嵌め込んだのち、該溝状凹部にタイヤ本体と同
質の材料でつくられた栓体を嵌合し、高周波誘導加熱に
よってビードコアを加熱し、その熱でタイヤ本体と栓体
とを溶着一体化することを特徴としている。以下、実施
例をあられす図面にもとついて説明する。This invention was made for the purpose of providing a method for manufacturing a cast tire using a thermoplastic elastomer or thermoplastic resin as a molding material, in which a bead core can be successfully embedded. A tire body with groove-like recesses in the bead portion that open at the sides is cast-molded using thermoplastic elastomer or thermoplastic resin, and a bead core made of a ferromagnetic metal material is fitted into the four groove-like portions. After that, a plug made of the same material as the tire body is fitted into the groove-like recess, the bead core is heated by high-frequency induction heating, and the heat is used to weld and integrate the tire body and the plug. Hereinafter, embodiments will be explained based on the accompanying drawings.
本発明にかかる製法では、先ず第１図に示す如くビード
部２に全周にわたって溝状凹部を形成したタイヤ本体１
を公知の注型法によって成形する。In the manufacturing method according to the present invention, first, as shown in FIG.
is molded by a known casting method.
タイヤ本体Ｉ用の成形材料としては、例えばポリエステ
ル系エラストマー、ポリウレタン系エラストマー、ポリ
オレフィン系エラストマー等の熱可塑性エラストマーを
使用することかできる。溝状凹部３の巾は、使用される
ビードコア４の「１〕よりも０５〜１間程度広くしてお
くのが好ましく−その深さは所定のビードコア埋設位置
にビードコア４が位置するようなものとする。また、溝
状凹部３の径は、ビードコア４の径と等シくシテおく。As the molding material for the tire body I, thermoplastic elastomers such as polyester elastomers, polyurethane elastomers, and polyolefin elastomers can be used. It is preferable that the width of the groove-shaped recess 3 is about 05 to 1 wider than the width of the bead core 4 to be used, and its depth is such that the bead core 4 is located at a predetermined bead core embedding position. Further, the diameter of the groove-like recess 3 is set to be equal to the diameter of the bead core 4.
つきに、第２図に示すようにタイヤ本体１の溝状凹部３
に必要数のビードコア４を嵌め込み、その外側をタイヤ
本体１と同質の成形材料で成形した栓体５で閉塞する。At the same time, as shown in FIG.
A required number of bead cores 4 are fitted into the tire, and the outside thereof is closed with a plug body 5 molded from the same molding material as the tire body 1.
ビードコアとしては、適度の強度をそなえ、かつ高周波
誘導加熱によって加熱することができるような強磁性体
、例えば鋼線のような金属製品を使用する。栓体５はタ
イヤ本体１と同様な成形材料、すなわち熱可塑性エラス
トマーで成形されるもので、溝状凹部３とほぼ等しい肉
厚をもつ環状体として形成され、上記ビードコア４に当
接するまで溝状凹部３内に挿入される。As the bead core, a ferromagnetic material, such as a metal product such as a steel wire, is used that has appropriate strength and can be heated by high-frequency induction heating. The plug body 5 is molded from the same molding material as the tire body 1, that is, a thermoplastic elastomer, and is formed as an annular body having a wall thickness approximately equal to that of the groove-shaped recess 3. It is inserted into the recess 3.
ビードコア４を挿入した溝状凹部３を栓体５て閉塞した
ら、高周波誘導加熱によって強磁性材料でつくられたビ
ードコアを加熱し、栓体５をタイヤ本体１に溶着させる
。高周波誘導加熱用のコイル６は、ビードコア４全体か
同時に均一に加熱されるようにビードコア４に沿って全
周に配置するのが好ましいが、ビードコア４は金属材料
でつくられ、熱伝導性に富んでいるので、条件によって
はコイル６を全周に設けておかなくとも全体的に均一に
加熱することが可能である。コイル６をビード部２の周
上の特定の個所付近に設けておき、ビード部２か全周に
わたってこのコイル設置個所を通るようにタイヤ本体１
を回転させつつ順次加熱してゆくようにしてもよい。高
周波誘導加熱の発振周波数はｌ Ｑ Ｑ Ｉ＜Ｊ−１ｚ
〜５Ｍｌ−１ｚ程度とするのが好ましいが、これに限る
ものではない。なお、加熱中は、第２図に示すように当
て板７，７′等を用いて溶融接着部を１〜５に９／ｃｄ
の圧力て挟圧するのが望ましい。After the groove-shaped recess 3 into which the bead core 4 has been inserted is closed with the plug 5, the bead core made of a ferromagnetic material is heated by high-frequency induction heating, and the plug 5 is welded to the tire body 1. The coil 6 for high-frequency induction heating is preferably arranged all around the bead core 4 so that the entire bead core 4 is uniformly heated at the same time, but the bead core 4 is made of a metal material and has high thermal conductivity. Therefore, depending on the conditions, it is possible to uniformly heat the entire area without having to provide the coil 6 all around the circumference. A coil 6 is provided near a specific location on the circumference of the bead portion 2, and the tire body 1 is inserted so as to pass through this coil installation location over the entire circumference of the bead portion 2.
Alternatively, the heating may be performed sequentially while rotating. The oscillation frequency of high frequency induction heating is l Q Q I<J-1z
Although it is preferable to set it as about 5 Ml-1z, it is not limited to this. During heating, as shown in Figure 2, use plates 7, 7', etc. to spread the molten adhesive part from 1 to 5 by 9/cd.
It is preferable to apply pressure to the area.
以上の操作によって、栓体５とタイヤ本体１とが一体化
してビードコア埋設部の空隙部が消滅し、ビード部か変
形することなくビードコア４が確実に保持された第３図
に示すような注型タイヤ１゜が得られるのである。栓体
溶着用の加熱を高周波誘導加熱によって行なうので、加
熱作業が簡単であシ、加熱不用な部分まで加熱すること
がなく、作業を能率的に行なうことができる。By the above operation, the plug 5 and the tire body 1 are integrated, the gap in the bead core buried part disappears, and the bead core 4 is securely held without deforming the bead part as shown in Fig. 3. A molded tire of 1° is obtained. Since the heating for welding the plug body is performed by high-frequency induction heating, the heating operation is simple and the operation can be carried out efficiently without heating parts that do not need to be heated.
以上に説明したように、本発明にががる注型タイヤの製
法は、ビード部の変形や大きな空隙の発生がなく、ビー
ドコアを所定位置に確実に固定することができるすぐれ
たものである。ビードコアかタイヤ本体の成形後に埋設
されるため、注型時におけるビードコア固定用のピン等
が不要となり、製品にピン跡等が残留することもなくな
った。As explained above, the method for manufacturing a cast tire according to the present invention is excellent in that it can reliably fix the bead core in a predetermined position without deforming the bead portion or creating a large gap. Since the bead core is buried after the tire body is molded, there is no need for pins to fix the bead core during casting, and there are no pin marks left on the product.
第１図および第２図は本発明にかかる注型タイヤの製法
の説明図、第３図は注型タイヤの断面図である。
１ ・タイヤ本体、２・−ビード部、３・・溝状凹部、
４ ビードコア、５・・蓋体、６−コイル、１０−注型
タイヤ。
特許出願人 住友ゴム工業株式会社
代理人 弁理士 菅 原 弘 志第１図
１０
第３図FIGS. 1 and 2 are explanatory diagrams of a method for manufacturing a cast tire according to the present invention, and FIG. 3 is a sectional view of the cast tire. 1. Tire body, 2.-Bead portion, 3. Groove-shaped recessed portion,
4: bead core, 5: lid, 6: coil, 10: cast tire. Patent applicant Sumitomo Rubber Industries Co., Ltd. Agent Patent attorney Hiroshi Sugawara Figure 1 10 Figure 3
Claims (1)
本体を熱可塑性エラストマーまたは熱可塑性樹脂を用い
て注型成形し、強磁性を有する金属材料でつくられたビ
ードコアを前記溝状凹部に嵌め込んだのち、該溝状凹部
にタイヤ本体と同質の材料でつくられた栓体を嵌合し、
高周波誘導加熱によってビードコアを加熱し、その熱で
タイヤ本体と栓体とを溶着一体化することを特徴とする
注型タイヤの製法。(1) A tire body with an outwardly opening groove-like recess in the bead part is cast-molded using thermoplastic elastomer or thermoplastic resin, and a bead core made of a ferromagnetic metal material is inserted into the groove-like recess. After fitting into the groove-like recess, a plug made of the same material as the tire body is fitted,
A method for producing a cast tire characterized by heating a bead core by high-frequency induction heating and using the heat to weld and integrate the tire body and the plug body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58019107A JPS59145130A (en) | 1983-02-08 | 1983-02-08 | Preparation of cast tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58019107A JPS59145130A (en) | 1983-02-08 | 1983-02-08 | Preparation of cast tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59145130A true JPS59145130A (en) | 1984-08-20 |
| JPH0313976B2 JPH0313976B2 (en) | 1991-02-25 |
Family
ID=11990254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58019107A Granted JPS59145130A (en) | 1983-02-08 | 1983-02-08 | Preparation of cast tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59145130A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63203322A (en) * | 1987-02-19 | 1988-08-23 | Kyowa Seiki Kk | Welding of plastic molding |
| EP2554362A1 (en) * | 2010-03-30 | 2013-02-06 | Bridgestone Corporation | Tire manufacturing method, tire, and tire forming mold |
| EP3643530B1 (en) * | 2017-06-19 | 2023-03-08 | Bridgestone Corporation | Bead core, production method therefor, and pneumatic tire |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51136762A (en) * | 1975-05-21 | 1976-11-26 | Toyo Tire & Rubber Co | Method of making casting tire |
-
1983
- 1983-02-08 JP JP58019107A patent/JPS59145130A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51136762A (en) * | 1975-05-21 | 1976-11-26 | Toyo Tire & Rubber Co | Method of making casting tire |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63203322A (en) * | 1987-02-19 | 1988-08-23 | Kyowa Seiki Kk | Welding of plastic molding |
| EP2554362A1 (en) * | 2010-03-30 | 2013-02-06 | Bridgestone Corporation | Tire manufacturing method, tire, and tire forming mold |
| EP2554362A4 (en) * | 2010-03-30 | 2013-09-04 | Bridgestone Corp | Tire manufacturing method, tire, and tire forming mold |
| US9649819B2 (en) | 2010-03-30 | 2017-05-16 | Bridgestone Corporation | Tire manufacturing method using jig to fix covered bead inside tire mold |
| EP3643530B1 (en) * | 2017-06-19 | 2023-03-08 | Bridgestone Corporation | Bead core, production method therefor, and pneumatic tire |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0313976B2 (en) | 1991-02-25 |
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