JPS6345300Y2 - - Google Patents
Info
- Publication number
- JPS6345300Y2 JPS6345300Y2 JP5047684U JP5047684U JPS6345300Y2 JP S6345300 Y2 JPS6345300 Y2 JP S6345300Y2 JP 5047684 U JP5047684 U JP 5047684U JP 5047684 U JP5047684 U JP 5047684U JP S6345300 Y2 JPS6345300 Y2 JP S6345300Y2
- Authority
- JP
- Japan
- Prior art keywords
- blade
- tread
- anchor
- knife blade
- tire
- 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.)
- Expired
Links
- 238000004073 vulcanization Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 241000238631 Hexapoda Species 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Nonmetal Cutting Devices (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【考案の詳細な説明】
本考案は加硫の際タイヤのトレツド部表面に細
溝を形成するためのナイフブレードに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a knife blade for forming narrow grooves on the tread surface of a tire during vulcanization.
一般にタイヤトレツド部の表面にはウエツトグ
リツプ性向上、偏摩耗の防止等の観点から２mm以
下の細溝を多数施す方法が採用されている。この
細溝はタイヤを加硫する際、金型のトレツドリン
グに予めトレツド部内方にブレードが侵入する方
向、即ちブレード面がタイヤ半径方向になるよう
にナイフブレードを装着し、この金型内でタイヤ
を加硫すると同時に形成される。 In general, a method is adopted in which a large number of narrow grooves of 2 mm or less are formed on the surface of the tire tread in order to improve wet grip and prevent uneven wear. When vulcanizing a tire, this narrow groove is formed by attaching a knife blade to the tread ring of the mold in advance so that the blade enters the inside of the tread portion, that is, so that the blade surface is in the radial direction of the tire. Formed at the same time as vulcanization.
一般に多用されているナイフブレードは、第１
図に示すごとく、トレツドリングに埋設されるア
ンカー部２と細溝を形成するブレード部３は同一
平面の板状断熱体として形成されている。 The most commonly used knife blade is the
As shown in the figure, the anchor part 2 embedded in the tread ring and the blade part 3 forming the narrow groove are formed as a plate-like heat insulating body on the same plane.
第２図は従来のナイフブレードの他の例であ
り、Ｌ字状の細溝を形成するのに用いられるもの
で、アンカー部２とブレード部は同一平面を形成
している。該ナイフブレードを用いて加硫し、タ
イヤを加硫金型から取出す際、ブレードがトレツ
ドゴム内に埋設された状態となつているため、該
ブレードをトレツドゴムから剥離、除去するのが
困難となり、タイヤ取出し後に細溝周辺が虫食い
状態の損傷を受けることがある。この現象はトレ
ツド部がスチールコートのベルト層で強化され、
トレツド部剛性の特に高いスチールベルテツドラ
ジアルタイヤに著しい。 FIG. 2 shows another example of a conventional knife blade, which is used to form an L-shaped narrow groove, and the anchor portion 2 and the blade portion form the same plane. When the tire is cured using the knife blade and removed from the vulcanization mold, the blade is embedded in the tread rubber, making it difficult to peel and remove the blade from the tread rubber. After removal, the area around the narrow groove may be damaged by insects. This phenomenon is reinforced by the steel-coated belt layer on the tread section,
This is especially noticeable in steel belt radial tires with particularly high tread rigidity.
本考案はこの現象をナイフブレードの形状を変
更することにより効果的に防止し、所定の設計に
沿つた細溝の形成を可能とするナイフブレードを
提案するものである。 The present invention effectively prevents this phenomenon by changing the shape of the knife blade, and proposes a knife blade that makes it possible to form narrow grooves in accordance with a predetermined design.
以下本考案の一実施例を図面に基づき説明す
る。 An embodiment of the present invention will be described below based on the drawings.
図において、本考案のナイフブレード１は加硫
金型のトレツドリングに埋設されるアンカー部５
と加硫の際、トレツドゴム内部に侵入し、トレツ
ド部の表面に細溝を形成するブレード部６よりな
る。前記アンカー部５とブレード部６は、側部輪
郭線が凹部７を形成する部分で境界Ｓをなしてい
る。ブレード部６の前記境界Ｓから一定間隔を隔
てて、曲折部Ｋが形成され該曲折部を境にしてブ
レード部の先端部６ａは、アンカー部５に対して
所定の角度θ特に好ましくは140゜〜165゜の範囲の
角度で折れ曲がつている。該曲折部Ｋを形成する
ことにより、加硫タイヤを金型から取出す際、ブ
レード部はアンカー部の配列方向になるように変
形するいわば脱離の際の逃げが生じ、その周囲の
付着ゴムとブレード部の脱離力が緩和され、周囲
のゴムの損傷が抑制できる。従つてアンカー部５
とブレード部６ａの間の角度が大きすぎると、例
えば180゜に近い状態あるいは90゜に近い状態では
この効果は少ない。 In the figure, the knife blade 1 of the present invention has an anchor part 5 embedded in the tread ring of the vulcanization mold.
The blade part 6 penetrates into the tread rubber during vulcanization and forms narrow grooves on the surface of the tread part. The anchor portion 5 and the blade portion 6 form a boundary S at a portion where the side contour line forms the recess 7. A bending part K is formed at a constant distance from the boundary S of the blade part 6, and the tip part 6a of the blade part is formed at a predetermined angle θ, preferably 140°, with respect to the anchor part 5 with the bending part as a border. It is bent at an angle in the range of ~165°. By forming the bent portion K, when the vulcanized tire is taken out from the mold, the blade portion deforms in the direction of arrangement of the anchor portions, so to speak, and escapes when detached, and the attached rubber around the blade portion deforms. The detachment force of the blade part is alleviated, and damage to the surrounding rubber can be suppressed. Therefore, the anchor part 5
If the angle between the blade portion 6a and the blade portion 6a is too large, for example close to 180 degrees or close to 90 degrees, this effect will be small.
なお本考案のナイフブレードをトレツドリング
に装着するには、ブレード部がトレツド面に対し
てほぼ垂直方向に配置される点で従来と同様であ
る。 The knife blade of the present invention can be mounted on a tread ring in the same manner as in the prior art in that the blade portion is disposed in a direction substantially perpendicular to the tread surface.
第４図は本考案の他の実施例を示しており、ブ
レード部８が略Ｌ字状を形成している点で従来の
形状を示す第２図に対応するものである。なお本
考案ではナイフブレードの形状は前記の他、各種
の変形例が可能であることはいうまでもない。 FIG. 4 shows another embodiment of the present invention, which corresponds to FIG. 2 showing the conventional shape in that the blade portion 8 is approximately L-shaped. It goes without saying that in the present invention, the shape of the knife blade may be modified in various ways other than those described above.
このように本考案はアンカー部とブレード部と
の間に角度を設けて形成したため、加硫タイヤを
金型から除去する際、ブレード部の周囲ゴムから
の移動に逃げが生じるためのゴム剥離が容易とな
り、細溝周辺の損傷が抑制され、さらにトレツド
部に深い細溝の形成も可能となり、トレツドの摩
耗末端のウエツトグリツプ性も一層効果的とな
る。 In this way, since the present invention forms an angle between the anchor part and the blade part, when the vulcanized tire is removed from the mold, the blade part moves from the surrounding rubber and the rubber peels off due to escape. This makes it easier to grip, suppresses damage around the narrow grooves, allows deep grooves to be formed in the tread portion, and provides even more effective wet grip at the worn end of the tread.
第１図，第２図は従来のナイフブレードの斜視
図、第３図，第４図は本考案のナイフブレードの
斜視図である。
１……ナイフブレード、２，５，９……アンカ
ー部、３，６，８……ブレード部、７……凹部、
Ｓ……境界。
1 and 2 are perspective views of a conventional knife blade, and FIGS. 3 and 4 are perspective views of a knife blade of the present invention. 1... Knife blade, 2, 5, 9... Anchor part, 3, 6, 8... Blade part, 7... Recessed part,
S...boundary.
Claims (1)
カー部と加硫の際トレツドゴム内部に侵入し、
トレツド表面に細溝を形成するブレード部より
なるナイフブレードであつて、前記アンカー部
はブレード部に対して、一定角度の曲折面を形
成していることを特徴とするタイヤ用ナイフブ
レード。 ２ アンカー部とブレード部の間の角度は140゜〜
165゜の範囲である実用新案登録請求の範囲第１
項記載のタイヤ用ナイフブレード。[Scope of Claim for Utility Model Registration] 1. An anchor part buried in the tread ring of a vulcanization mold and an anchor part that invades the inside of the tread rubber during vulcanization.
1. A knife blade for a tire, comprising a blade portion forming a narrow groove on a tread surface, wherein the anchor portion forms a curved surface at a constant angle with respect to the blade portion. 2 The angle between the anchor part and the blade part is 140° ~
The first claim for utility model registration, which is within the range of 165°
Knife blade for tires as described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5047684U JPS60162017U (en) | 1984-04-05 | 1984-04-05 | Knife blade for tires |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5047684U JPS60162017U (en) | 1984-04-05 | 1984-04-05 | Knife blade for tires |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60162017U JPS60162017U (en) | 1985-10-28 |
| JPS6345300Y2 true JPS6345300Y2 (en) | 1988-11-24 |
Family
ID=30568642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5047684U Granted JPS60162017U (en) | 1984-04-05 | 1984-04-05 | Knife blade for tires |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60162017U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5120046B2 (en) * | 2008-04-22 | 2013-01-16 | 横浜ゴム株式会社 | Manufacturing method of tire mold |
-
1984
- 1984-04-05 JP JP5047684U patent/JPS60162017U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60162017U (en) | 1985-10-28 |
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