JP2000142026A - Pneumatic tire, manufacture thereof and metal mold for molding tire - Google Patents
Pneumatic tire, manufacture thereof and metal mold for molding tireInfo
- Publication number
- JP2000142026A JP2000142026A JP10319164A JP31916498A JP2000142026A JP 2000142026 A JP2000142026 A JP 2000142026A JP 10319164 A JP10319164 A JP 10319164A JP 31916498 A JP31916498 A JP 31916498A JP 2000142026 A JP2000142026 A JP 2000142026A
- Authority
- JP
- Japan
- Prior art keywords
- tire
- surface roughness
- molded
- mold
- glossiness
- 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
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、空気入りタイ
ヤ、空気入りタイヤの製造方法及びタイヤ成形用金型に
係わり、更に詳しくは成形されたタイヤの表面の光沢度
を上げ、タイヤの外観を向上させることが出来る空気入
りタイヤ、空気入りタイヤの製造方法及びタイヤ成形用
金型に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic tire, a method for manufacturing a pneumatic tire, and a mold for molding a tire, and more particularly, to increase the glossiness of the surface of a molded tire and improve the appearance of the tire. The present invention relates to a pneumatic tire, a method for manufacturing a pneumatic tire, and a mold for molding a tire.
【０００２】[0002]
【従来の技術】一般にタイヤ成形用金型は、工作機械等
の切削加工によってパターンを彫る作業が行われている
が、機械加工はバリ等が残るため、切削加工後の表面を
ガラスビーズ等でビーズショットを行って仕上げを行っ
ている。しかし、金型表面には上記ビーズショットのた
めに微細な凹凸が成形され、この凹凸は成形されるタイ
ヤの表面にも転写されることになる。このタイヤ表面の
微細な凹凸は、光を乱反射させるためタイヤ表面が白っ
ぽく見え、タイヤの外観を悪化させると言う問題があっ
た。2. Description of the Related Art In general, tire molding dies are engraved with a pattern by cutting with a machine tool or the like. However, since the burrs remain in the machining, the surface after cutting with glass beads or the like is used. Finished with bead shot. However, fine irregularities are formed on the mold surface due to the above-mentioned bead shot, and these irregularities are transferred to the surface of the molded tire. The fine irregularities on the tire surface have a problem that the tire surface looks whitish because light is diffusely reflected, and the appearance of the tire is deteriorated.
【０００３】[0003]
【発明が解決しようとする課題】このため、成形された
タイヤ表面の光沢度は、タイヤを成形する成形用金型の
表面粗さに対応するものと考えられ、従って、成形用金
型の表面粗さを一定の粗さに仕上げると、成形されるタ
イヤ表面も光沢度の良いものが製造出来ると考えらてい
た。For this reason, it is considered that the glossiness of the surface of the molded tire corresponds to the surface roughness of the molding die for molding the tire. It was thought that if the roughness was finished to a certain level, a molded tire surface with good gloss could be produced.
【０００４】然しながら、発明者等がタイヤ表面の凹凸
の大きさと、タイヤ表面の光沢度との関係を実験等によ
り調べた結果、成形用金型の表面粗さの全てとタイヤ表
面の光沢度とは必ずしも対応するものではないことが判
った。即ち、タイヤ表面の光沢度は、金型表面に形成さ
れる凹凸のうち、光沢度を著しく悪化させる凹凸のサイ
ズが存在することが判り、通常のビーズショットを行っ
た際に出来る凹凸サイズの領域（通常のビーズショット
を行った時の表面粗さＲａ＝1.1 程度・Ｒａの値とは、
単位長さ当たりの面積）が、光沢度を著しく悪化させる
領域であることが判った。[0004] However, the present inventors have examined the relationship between the size of the unevenness on the tire surface and the glossiness of the tire surface by experiments and the like. As a result, all of the surface roughness of the molding die, the glossiness of the tire surface and Did not always correspond. In other words, the glossiness of the tire surface is found to include the size of the unevenness that significantly deteriorates the glossiness among the unevennesses formed on the mold surface, and the unevenness size region formed when a normal bead shot is performed. (Surface roughness Ra when a normal bead shot is performed is about 1.1. The value of Ra is
Area per unit length) was found to be a region that significantly deteriorates the glossiness.
【０００５】この発明の目的は、金型切削加工後の金型
表面をショットするビーズのサイズを所定のサイズにす
ることで、成形されるタイヤの表面の光沢度を上げ、タ
イヤの外観を向上させることが出来る空気入りタイヤを
提供することにある。また、この発明は表面粗さを最適
な表面粗さとした金型を使用してタイヤを製造すること
により、タイヤの生産性及び性能を悪化させることな
く、表面が光沢度のある外観の良好なタイヤを製造する
ことが出来る空気入りタイヤの製造方法を提供すること
にある。[0005] An object of the present invention is to increase the glossiness of the surface of a molded tire and improve the appearance of the tire by setting the size of a bead shot on the mold surface after the mold cutting process to a predetermined size. An object of the present invention is to provide a pneumatic tire that can be operated. In addition, the present invention manufactures a tire by using a mold having a surface roughness of the optimum surface roughness, without deteriorating the productivity and performance of the tire, the surface has a good glossy appearance. An object of the present invention is to provide a method for manufacturing a pneumatic tire capable of manufacturing a tire.
【０００６】更に、ショットするビーズサイズをタイヤ
表面の光沢度に最適なサイズを選択して金型の表面を仕
上げることにより、金型の生産性を向上させることが出
来ると共に、金型のコストダウンを図ることが出来るタ
イヤ成形用金型を提供することにある。Further, by selecting the optimum bead size for the gloss of the tire surface and finishing the mold surface, the productivity of the mold can be improved and the cost of the mold can be reduced. An object of the present invention is to provide a tire molding die capable of achieving the following.
【０００７】[0007]
【課題を解決するための手段】この発明は上記目的を達
成するため、この発明の空気入りタイヤは、成形された
タイヤの表面粗さ（ＲａＴ）が、触針式表面粗さ計で計
測した時、1.5 〜20μm の範囲になるように構成したこ
とを要旨とするものである。また、この発明の空気入り
タイヤの製造方法は、金型表面粗さ（Ｒａｘ）を成形さ
れるタイヤ表面粗さ（ＲａＴ）よりも粗く成形した金型
を用いて加硫成形し、該成形されたタイヤの表面粗さ
（ＲａＴ）が、触針式表面粗さ計で計測した時、1.5 〜
20μm の範囲となるように製造することを要旨とするも
のである。In order to achieve the above object, the present invention provides a pneumatic tire, in which the surface roughness (RaT) of a molded tire is measured by a stylus type surface roughness meter. The gist of the invention is that it is configured to be in the range of 1.5 to 20 μm. Further, in the method for manufacturing a pneumatic tire according to the present invention, the mold surface roughness (Rax) is vulcanized and molded by using a mold that is molded to be larger than the molded tire surface roughness (RaT). The surface roughness (RaT) of the tire was 1.5 to 1.5 when measured with a stylus type surface roughness meter.
The gist of the invention is that it is manufactured so as to be in the range of 20 μm.
【０００８】更に、この発明のタイヤ成形用金型は、触
針式表面粗さ計で計測した時、その表面粗さ（Ｒａｘ）
が1.5 〜20μm の範囲にある空気入りタイヤを製造する
タイヤ成形用金型であって、前記金型の表面を、粒径0.
15〜20mmのビーズショットにより成形したことを要旨と
するものである。Further, the tire mold of the present invention has a surface roughness (Rax) as measured by a stylus type surface roughness meter.
A pneumatic tire for producing a pneumatic tire having a particle size of 1.5 to 20 μm, wherein the surface of the mold has a particle diameter of 0,2.
The gist of the invention is that it is formed by a bead shot of 15 to 20 mm.
【０００９】この発明は、上記のように構成され、金型
切削加工後の金型表面をショットするビーズのサイズを
最適な粒度を選択して使用することで、タイヤ表面光沢
度に最適な表面粗さに形成し、この金型を使用してタイ
ヤを製造することにより、タイヤの表面の光沢度を上げ
て、タイヤの外観を向上させることが出来るようにした
ものである。また、このような方法によりタイヤを製造
することで、タイヤの生産性及び性能を悪化させること
なく、表面が光沢のある外観の良好タイヤを製造するこ
とが出来、更に金型の生産性を向上させて、金型のコス
トダウンも図ることが出来るものである。[0009] The present invention is configured as described above, and uses the size of a bead that shots the die surface after die cutting by selecting an optimal particle size, thereby obtaining an optimal surface for tire surface glossiness. By forming the tire to a roughness and using the mold to manufacture a tire, the glossiness of the surface of the tire can be increased and the appearance of the tire can be improved. Further, by manufacturing a tire by such a method, it is possible to manufacture a tire having a glossy surface and a good appearance without deteriorating the productivity and performance of the tire, and further improve the productivity of the mold. Thus, the cost of the mold can be reduced.
【００１０】[0010]
【発明の実施の形態】以下、添付図面に基づき、この発
明の実施形態を説明する。図１は、この発明を実施した
空気入りタイヤ１の一部切欠した斜視図を示し、２はタ
イヤトレッド部、３はサイド部を示し、この発明では、
成形されたタイヤのトレッド部２あるいはサイド部３
を、タイヤの外観を向上させる目的から表面粗さ（Ｒ
ａ：単位長さ当たりの面積）が、触針式表面粗さ計（JI
S B 0651：触針式表面粗さ測定器）で計測した時、1.5
〜20μm の範囲になるように形成し、タイヤの表面の光
沢度を上げている。Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a partially cutaway perspective view of a pneumatic tire 1 embodying the present invention, wherein 2 is a tire tread portion, 3 is a side portion, and in the present invention,
Tread portion 2 or side portion 3 of molded tire
For the purpose of improving the appearance of the tire, the surface roughness (R
a: Area per unit length) is measured by a stylus type surface roughness meter (JI
SB 0651: 1.5 when measured with a stylus type surface roughness meter)
It is formed so as to have a thickness of up to 20 μm to increase the glossiness of the tire surface.
【００１１】上記のような光沢度のあるタイヤを製造す
るには、図２に示すようなアルミニュウムまたはアルミ
ニュウム合金により成形した金型４（この実施形態で
は、金型を構成するセグメントピースの一部を示してい
る）を使用し、この金型４の成形表面４ａを、粒径0.15
〜20mmのビーズショット５により成形してある。なお、
ショットする材質としては、ガラスビーズ，プラスチッ
クビーズ，カーボンランダム，ステンレス等を用い、３
〜７kg /cm2 のショット圧力で、３０〜６０秒ショット
して表面を加工する。In order to manufacture a tire having the above-mentioned glossiness, a mold 4 made of aluminum or an aluminum alloy as shown in FIG. 2 (in this embodiment, a part of a segment piece constituting the mold) The molding surface 4a of the mold 4 is set to have a particle size of 0.15
It is formed by a bead shot 5 of about 20 mm. In addition,
The material to be shot is glass beads, plastic beads, carbon random, stainless steel, etc.
At a shot pressure of シ ョ ッ ト 7 kg / cm 2 , the surface is processed by a shot for 30 to 60 seconds.
【００１２】即ち、金型４の表面粗さ（Ｒａｘ）を成形
されるタイヤ表面粗さ（ＲａＴ）よりも粗く成形し、そ
の金型４を用いて加硫成形することで、成形されたタイ
ヤの表面粗さ（ＲａＴ）は、触針式表面粗さ計で計測し
た時、1.5 〜20μm の範囲となり、光沢度のあるタイヤ
を製造することが出来るものである。That is, the molded tire is formed by molding the surface roughness (Rax) of the mold 4 to be larger than the surface roughness (RaT) of the molded tire, and performing vulcanization molding using the mold 4. Has a surface roughness (RaT) of 1.5 to 20 .mu.m as measured by a stylus type surface roughness meter, and can produce a glossy tire.
【００１３】次に、空気入りタイヤに対応するゴムサン
プルと、タイヤ金型の表面粗さとの関係について実験し
た結果を説明する。６０ショト〜６００ショットの粒径
の異なるビースショットを行い、４種類の試験金型を作
製した。 〔ショット方法〕 ショットする材質：ガラスビーズ，プラスチックビー
ズ，カーボンランダム，ステンレス等を用いる。 圧力：通常３〜７kg /cm2 、今回の実施例におけるモー
ルド作成条件５Kg/cm2 シッョト時間：３０〜６０秒 金型：アルミニュウムを使用した。Next, a rubber sun corresponding to a pneumatic tire
An experiment was conducted on the relationship between the pull and the surface roughness of the tire mold.
The results will be described. Particle size of 60 shots to 600 shots
Different bead shots and make four types of test dies
Made. [Shot method] Shot material: glass beads, plastic beads
, Carbon random, stainless steel, etc. Pressure: Normally 3-7kg / cmTwo, The mode in this embodiment
5kg / cmTwo Shot time: 30 to 60 seconds Die: Aluminum was used.
【００１４】試作した金型により、下記の表１の配合ゴ
ムを１６０°Ｃで２０分間加硫し、表面粗さ試験、光沢
度試験に供した。表面粗さ試験は、JIS B 0651（触針式
表面粗さ測定器）に従い、触針式表面粗さ計を用いて、
表面粗さ（Ｒａ：単位長さ当たりの面積）の値を測定し
た。作製したゴムサンプルと金型の表面粗さ（μｍ）と
の関係は、下記の表２に示す通りである。The compounded rubbers shown in Table 1 below were vulcanized at 160 ° C. for 20 minutes using the prototype mold, and subjected to a surface roughness test and a glossiness test. The surface roughness test is performed using a stylus type surface roughness meter according to JIS B 0651 (a stylus type surface roughness meter).
The value of surface roughness (Ra: area per unit length) was measured. The relationship between the produced rubber sample and the surface roughness (μm) of the mold is as shown in Table 2 below.
【００１５】[0015]
【表１】 [Table 1]
【００１６】[0016]
【表２】 [Table 2]
【００１７】また光沢度計を用いて、ゴムサンプルの光
沢度を測定した結果を表３に示す。Table 3 shows the result of measuring the glossiness of the rubber sample using a glossmeter.
【表３】 ゴムサンプルの表面粗さ（Ｒａ）と光沢度の関係を図３
のグラフに示す。図３から明らかなように、水平面に対
して６０°方向の反射光量が光沢度において優れている
ことが判った。[Table 3] Fig. 3 shows the relationship between the surface roughness (Ra) of the rubber sample and the gloss.
Is shown in the graph. As is clear from FIG. 3, the amount of reflected light in the direction of 60 ° with respect to the horizontal plane was excellent in glossiness.
【００１８】[0018]
【発明の効果】この発明は、上記のように成形されたタ
イヤの表面粗さ（ＲａＴ）が、触針式表面粗さ計で計測
した時、1.5 〜20μm の範囲にとなるようにしたので、
成形されるタイヤの表面の光沢度を上げ、タイヤの外観
を向上させることが出来る効果がある。また、金型表面
粗さ（Ｒａｘ）を成形されるタイヤ表面粗さ（ＲａＴ）
よりも粗く成形した金型を用いて加硫成形し、該成形さ
れたタイヤの表面粗さ（ＲａＴ）が、触針式表面粗さ計
で計測した時、1.5 〜20μm の範囲となるように製造す
るので、タイヤの生産性及び性能を悪化させることな
く、表面が光沢度のある外観の良好タイヤを製造するこ
とが出来る効果がある。According to the present invention, the surface roughness (RaT) of the tire formed as described above is in the range of 1.5 to 20 μm when measured with a stylus type surface roughness meter. ,
This has the effect of increasing the glossiness of the surface of the molded tire and improving the appearance of the tire. The mold surface roughness (Rax) is used to mold the tire surface roughness (RaT).
Vulcanization molding using a mold that is more coarsely molded so that the surface roughness (RaT) of the molded tire is in the range of 1.5 to 20 μm when measured with a stylus type surface roughness meter. Since the tire is manufactured, there is an effect that a tire having a glossy surface and a good appearance can be manufactured without deteriorating the productivity and performance of the tire.
【００１９】更に、触針式表面粗さ計で計測した時、そ
の表面粗さ（ＲａＴ）が1.5 〜20μm の範囲にある空気
入りタイヤを製造するタイヤ成形用金型であって、前記
金型の表面を、粒径0.15〜20mmのビーズショットにより
成形したので、金型の生産性を向上させることが出来る
と共に、金型のコストダウンを図ることが出来、更に表
面が光沢度のある外観の良好タイヤを製造することが出
来る効果がある。Further, there is provided a tire molding die for producing a pneumatic tire having a surface roughness (RaT) in the range of 1.5 to 20 μm as measured by a stylus type surface roughness meter, wherein the die is Is molded by bead shot with a particle size of 0.15 to 20 mm, so that the productivity of the mold can be improved, the cost of the mold can be reduced, and the surface has a glossy appearance. There is an effect that a good tire can be manufactured.
【図１】この発明を実施した空気入りタイヤの一部切欠
した斜視図である。FIG. 1 is a partially cutaway perspective view of a pneumatic tire embodying the present invention.
【図２】アルミニュウムまたはアルミニュウム合金によ
り成形した金型（この実施形態では、金型を構成するセ
グメントピースの一部を示している）の斜視図である。FIG. 2 is a perspective view of a mold formed of aluminum or an aluminum alloy (in this embodiment, a part of a segment piece constituting the mold is shown).
【図３】ゴムサンプルの表面粗さ（Ｒａ）と光沢度の関
係を示すグラフである。FIG. 3 is a graph showing the relationship between the surface roughness (Ra) of a rubber sample and glossiness.
１ 空気入りタイヤ ２ タイヤトレ
ッド部 ３ サイド部 ４ 金型 ４ａ 成形表面 ５ ビーズシ
ョット ＲａＴ タイヤ表面粗さ Ｒａｘ 金型表
面粗さDESCRIPTION OF SYMBOLS 1 Pneumatic tire 2 Tire tread part 3 Side part 4 Die 4a Molding surface 5 Bead shot RaT Tire surface roughness Rax Die surface roughness
───────────────────────────────────────────────────── フロントページの続き (72)発明者 網野 直也 神奈川県平塚市追分２番１号 横浜ゴム株 式会社平塚製造所内 (72)発明者 石川 泰弘 神奈川県平塚市追分２番１号 横浜ゴム株 式会社平塚製造所内 Ｆターム(参考） 4F202 AH20 CA21 CB01 CU01 CU14 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Naoya Amino 2-1 Oiwake, Hiratsuka-shi, Kanagawa Prefecture Yokohama Rubber Co., Ltd. Inside the Hiratsuka Factory (72) Inventor Yasuhiro Ishikawa 2-1 Oiwake, Hiratsuka-shi, Kanagawa Yokohama Rubber Co., Ltd. F-term in Hiratsuka Factory (reference) 4F202 AH20 CA21 CB01 CU01 CU14
Claims (4)
が、触針式表面粗さ計で計測した時、1.5 〜20μm の範
囲にある空気入りタイヤ。1. Surface roughness (RaT) of a molded tire
However, when measured with a stylus type surface roughness meter, a pneumatic tire is in the range of 1.5 to 20 μm.
Ｔ）が、少なくともタイヤのトレッド部あるいはサイド
部である請求項１に記載の空気入りタイヤ。2. The molded tire has a surface roughness (Ra)
The pneumatic tire according to claim 1, wherein T) is at least a tread portion or a side portion of the tire.
イヤ表面粗さ（ＲａＴ）よりも粗く成形した金型を用い
て加硫成形し、該成形されたタイヤの表面粗さ（Ｒａ
Ｔ）が、触針式表面粗さ計で計測した時、1.5 〜20μm
の範囲となるように製造する空気入りタイヤの製造方
法。3. A vulcanization molding is performed using a mold having a mold surface roughness (Rax) larger than a tire surface roughness (RaT) to be molded, and the surface roughness (Ra) of the molded tire is determined.
T) is 1.5 to 20 μm when measured with a stylus type surface roughness meter.
The manufacturing method of the pneumatic tire manufactured so that it may be in the range of.
面粗さ（ＲａＴ）が1.5 〜20μm の範囲にある空気入り
タイヤを製造するタイヤ成形用金型であって、 前記金
型の表面を、粒径0.15〜20mmのビーズショットにより成
形したタイヤ成形用金型。4. A tire molding die for producing a pneumatic tire having a surface roughness (RaT) in the range of 1.5 to 20 μm as measured by a stylus type surface roughness meter, wherein the die is A tire molding die in which the surface of is molded with a bead shot having a particle size of 0.15 to 20 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10319164A JP2000142026A (en) | 1998-11-10 | 1998-11-10 | Pneumatic tire, manufacture thereof and metal mold for molding tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10319164A JP2000142026A (en) | 1998-11-10 | 1998-11-10 | Pneumatic tire, manufacture thereof and metal mold for molding tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000142026A true JP2000142026A (en) | 2000-05-23 |
Family
ID=18107157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10319164A Pending JP2000142026A (en) | 1998-11-10 | 1998-11-10 | Pneumatic tire, manufacture thereof and metal mold for molding tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000142026A (en) |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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1998
- 1998-11-10 JP JP10319164A patent/JP2000142026A/en active Pending
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