JPH0415086B2 - - Google Patents
Info
- Publication number
- JPH0415086B2 JPH0415086B2 JP57209112A JP20911282A JPH0415086B2 JP H0415086 B2 JPH0415086 B2 JP H0415086B2 JP 57209112 A JP57209112 A JP 57209112A JP 20911282 A JP20911282 A JP 20911282A JP H0415086 B2 JPH0415086 B2 JP H0415086B2
- Authority
- JP
- Japan
- Prior art keywords
- tread
- molding
- mold
- tire
- kerf
- 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 - Lifetime
Links
- 238000000465 moulding Methods 0.000 claims description 70
- 210000000988 bone and bone Anatomy 0.000 claims description 39
- 238000013461 design Methods 0.000 claims description 15
- 239000011295 pitch Substances 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000013011 mating Effects 0.000 description 3
- 244000309466 calf Species 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
-
- 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
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1236—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern
- B60C11/124—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern inclined with regard to a plane normal to the tread surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C2037/80—Identifying, e.g. coding, dating, marking, numbering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/42—Moulds or cores; Details thereof or accessories therefor characterised by the shape of the moulding surface, e.g. ribs or grooves
-
- 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
- B29D2030/0612—Means for forming recesses or protrusions in the tyres, e.g. grooves or ribs, to create the tread or sidewalls patterns
-
- 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)
- Tires In General (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Description
【発明の詳細な説明】
この発明は、タイヤ成形用金型に関し、とく
に、二つ割り金型におけるトレツド成形面のトレ
ツド溝成形骨のシヨルダ成形面側の側壁面とカー
フ成形刃とをトレツド成形面の円周方向中心線側
に対して所定の角度範囲に傾斜させることによ
り、離型時におけるタイヤのトレツドゴムの変形
を小さくするようにしたものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tire molding mold, and in particular, the side wall surface of the tread groove molding bone on the shoulder molding surface side of the tread molding surface in a split mold and the kerf molding blade are connected to the tread molding surface of the tread molding surface. By inclining within a predetermined angle range with respect to the circumferential center line side, deformation of the tire tread rubber during release from the mold is reduced.
従来タイヤ成形用金型は、大別すると二つ割り
型とセクシヨナル型との２種に分類されている。
このうち、セクシヨナル型は、タイヤからの離型
機構の点では二つ割り型よりも優れているが、金
型の加工に高精度が必要であり、製造コストも高
く、機構が複雑で保守管理に手間を要する欠点が
ある。これに対し二つ割り型にはタイヤからの離
型機構に難点があり、離型時にタイヤトレツド部
が大きな力を受けるため、トレツドゴムに損傷を
与えるという問題があるが、セクシヨナル型に比
べて加工精度、製造コストおよび保守管理上の点
で優れているため、当業界においては専ら二つ割
り型の金型が使用されている。 Conventional tire molding molds are broadly classified into two types: split molds and sectional molds.
Among these, the sectional mold is superior to the split mold in terms of the mechanism for releasing the mold from the tire, but requires high precision in machining the mold, has high manufacturing costs, and has a complex mechanism that requires maintenance and management. There are drawbacks that require On the other hand, the two-split type has a problem with the release mechanism from the tire, and the tire tread part receives a large force when releasing the mold, causing damage to the tread rubber, but compared to the sectional type, processing accuracy and manufacturing Two-piece molds are exclusively used in the industry due to their cost and maintenance advantages.
この二つ割り型の金型は、第１図に示すよう
に、タイヤトレツド部（金型のトレツド成形面）
の円周方向中心線、またはその近傍で上型２と下
型４とに２分割されており、この上型２と下型４
との合わせ面２ａ，４ａを重ね合わせ密着させて
未加硫タイヤを加硫し、加硫されたタイヤを金型
から取り出すときは、上型２と下型４とをそれぞ
れ軸方向（矢印）に拡開して離型させる。 As shown in Figure 1, this two-split mold has a tire tread part (tread molding surface of the mold).
is divided into an upper mold 2 and a lower mold 4 at or near the circumferential center line, and the upper mold 2 and lower mold 4
When the unvulcanized tire is cured by overlapping the mating surfaces 2a and 4a of the mold and taking the cured tire out of the mold, the upper mold 2 and the lower mold 4 are moved in the axial direction (arrow). Expand and release from the mold.
上記の金型のトレツド成形面６には、リブ型の
トレツド溝成形骨８が設けてあり、このトレツド
溝成形骨８によりタイヤのトレツド部にトレツド
溝が形成されるが、高速用タイヤの金型では、ト
レツド溝成形骨８のほかに、カーフ成形刃（図示
せず）が植込まれている。 The tread forming surface 6 of the above mold is provided with a rib-shaped tread groove forming bone 8, and the tread groove forming bone 8 forms a tread groove in the tread portion of the tire. In addition to the tread groove forming bone 8, a kerf forming blade (not shown) is implanted in the mold.
しかし、上型２と下型４とが軸方向に拡開する
二つ割りの金型は、トレツドゴムの柔軟性を利用
してタイヤを金型から離型させるものであるか
ら、第２図で上型２について示すように、上型２
が上方に移動する際、タイヤのトレツド部２０に
成形されたトレツド溝２１が上型２のトレツド溝
成形骨８によつて大きな変形を受けることにな
り、トレツドゴムの弾性変形の限度を超えると溝
底にクラツク２３が発生し、タイヤの使用中にト
レツド部の損傷事故を惹起するという問題があ
る。 However, the two-split mold in which the upper mold 2 and the lower mold 4 expand in the axial direction utilizes the flexibility of the tread rubber to release the tire from the mold. As shown for 2, the upper mold 2
When the tire moves upward, the tread groove 21 formed in the tread portion 20 of the tire is subjected to large deformation by the tread groove forming bone 8 of the upper mold 2, and when the limit of elastic deformation of the tread rubber is exceeded, the groove There is a problem in that cracks 23 occur at the bottom, causing damage to the tread portion during use of the tire.
このようなタイヤのトレツド部の損傷は、スチ
ールコードラジアルタイヤのようにベルト剛性の
高いもの、偏平比が70％ないし50％の偏平タイ
ヤ、トレツドデザインがブロツク型のように剛性
の低いもの、あるいは周方向のカーフが多いもの
やカーフ溝が深いもの等の二つ割り型の金型で加
硫成形した場合に、とくに発生し易いことが知ら
れている。 Such damage to the tread area of tires is caused by tires with high belt rigidity such as steel cord radial tires, flat tires with an aspect ratio of 70% to 50%, tires with low rigidity such as block-type tread designs, It is also known that this problem is particularly likely to occur when vulcanization is performed using a two-piece mold with many circumferential kerfs or deep kerf grooves.
この発明者は、上記のような二つ割り金型の離
型時における問題を解決するために種々の金型を
試作して実験を行なつた結果、従来の金型はトレ
ツド溝成形骨、カーフ成形刃のトレツド成形面に
対する取付角度が適切でないことに起因するもの
であり、この取付角度を所定範囲に規制すること
により上記の問題は解決することが判明した。 In order to solve the above-mentioned problems when releasing the two-split mold, the inventor made various molds and conducted experiments. As a result, the inventor discovered that conventional molds do not have tread groove molding, kerf molding, etc. It has been found that this problem is caused by an inappropriate attachment angle of the blade to the tread forming surface, and that the above problem can be solved by regulating this attachment angle within a predetermined range.
この発明は、上記の観点からなされたものであ
り、この発明の目的は、トレツド溝成形骨のシヨ
ルダ成形面側の側壁面とカーフ成形刃とがトレツ
ド成形面の円周方向中心線に対して所定角度で傾
斜した二つ割り型のタイヤ成形用金型を提供する
ことにあり、またこの発明の目的は、トレツド溝
とカーフとに多きな変形を与えずにタイヤを離型
できる二つ割り型のタイヤ成形用金型を提供する
ことにある。 This invention has been made in view of the above, and an object of the present invention is to ensure that the side wall surface of the tread groove molded bone on the shoulder molding surface side and the kerf molding blade are aligned with respect to the circumferential center line of the tread molding surface. It is an object of the present invention to provide a two-split tire molding mold that is inclined at a predetermined angle, and an object of the present invention is to provide a two-split tire molding mold that allows a tire to be released from the mold without significantly deforming the tread groove and the kerf. Our purpose is to provide molds for
すなわち、この発明は、後述する実施例および
図面に示すように、複数条のトレツド溝成形骨と
カーフ成形刃とのうち少なくともトレツド溝成形
骨をトレツド成形面に取付けた二つ割り型のタイ
ヤ成形用金型において、前記各条のトレツド溝成
形骨とカーフ成形刃とを、それぞれトレツド成形
面の円周方向中心線側に傾斜させて設け、金型の
子午断面におけるトレツド成形面に立てた法線に
対して前記トレツド溝成形骨のシヨルダ成形面側
の側壁面と前記カーフ成形刃とがそれぞれなす角
度を、5°〜25°の範囲としたことを特徴とするタ
イヤ成形用金型に係る。 That is, as shown in the embodiments and drawings described later, the present invention provides a two-piece tire molding tool in which at least the tread groove molding bones of a plurality of tread groove molding bones and the kerf molding blade are attached to the tread molding surface. In the mold, each of the tread groove molding bones and the kerf molding blades are provided so as to be inclined toward the center line in the circumferential direction of the tread molding surface. On the other hand, the present invention relates to a tire molding die characterized in that the angle formed by the side wall surface of the tread groove molding bone on the shoulder molding surface side and the kerf molding blade is in the range of 5° to 25°.
以下、この発明のタイヤ成形用金型を添付図面
によつて説明する。 Hereinafter, the tire molding mold of the present invention will be explained with reference to the accompanying drawings.
第３図は、この発明のタイヤ成形用金型を上型
のトレツド成形面の一部について裏側から透視し
た斜視図である。 FIG. 3 is a perspective view of a part of the tread molding surface of the upper mold of the tire molding mold of the present invention, seen from the back side.
同図において、符号６はトレツド成形面、１５
はトレツド成形面の円周方向中心線（以下、「ト
レツド中心線」という）、８はトレツド溝形成骨、
１０はカーフ成形刃をそれぞれ示す。 In the same figure, reference numeral 6 indicates a tread molding surface, and 15
8 is the circumferential center line of the tread forming surface (hereinafter referred to as "tread center line"), 8 is the tread groove forming bone,
10 each indicates a kerf forming blade.
トレツド溝成形骨８とカーフ成形刃１０とは、
何れもトレツド中心線１５側に傾斜させて設けて
ある。 The tread groove forming bone 8 and the kerf forming blade 10 are as follows:
Both are inclined toward the tread center line 15 side.
トレツド溝成形骨８のシヨルダ成形面７側の側
壁面８ａとトレツド中心線１５側の側壁面８ｂと
の傾斜角α、βおよびカーフ成形刃１０の傾斜角
γについては、第４図によつて説明する。 The inclination angles α and β between the side wall surface 8a on the shoulder forming surface 7 side of the tread groove forming bone 8 and the side wall surface 8b on the tread center line 15 side and the inclination angle γ of the calf forming blade 10 are determined according to FIG. explain.
第４図は、第３図の上型の子午断面図であり、
第３図と同一の構成部分には同一符号を付して示
す。２ａは合わせ面（トレツド中心線１５を含む
水平面）である。 FIG. 4 is a meridional cross-sectional view of the upper die shown in FIG.
Components that are the same as those in FIG. 3 are designated by the same reference numerals. 2a is a mating surface (horizontal surface including the tread center line 15).
上記の子午断面において、トレツド成形面６と
トレツド溝成形骨８の側壁面８ａ，８ｂとの交点
からトレツド成形面６に立てた法線に対して、ト
レツド溝成形骨８の側壁面８ａ，８ｂがなす角
を、それぞれα、βとし、同様にカーフ成形刃１
０がトレツド成形面６の法線に対してなす角をγ
とする。 In the above meridional section, the side wall surfaces 8a, 8b of the tread groove formed bone 8 are aligned with respect to the normal line erected to the tread forming surface 6 from the intersection of the tread forming surface 6 and the side wall surfaces 8a, 8b of the tread groove formed bone 8. Let the angles formed by the kerf forming blade 1 be α and β, respectively.
The angle that 0 makes with the normal to the tread forming surface 6 is γ
shall be.
トレツド溝成形骨８の傾斜角α、βとカーフ成
形刃１０の傾斜角γとが、金型の離型性にどのよ
うに影響するかについては、一般に金型の離型機
構から考えて、トレツド溝成形骨８およびカーフ
成形刃１０が、合わせ面２ａ側（トレツド中心線
１５側）に大きく傾斜していること、すなわち傾
斜角αと傾斜角γとが大きいことが好ましいが、
この発明者の実験によれば、傾斜角αと傾斜角γ
との最低限度5°であり、5°未満の角度では、離型
が円滑でなくトレツドゴムに損傷を与えることが
確認された。 How the inclination angles α and β of the tread groove molding bones 8 and the inclination angle γ of the kerf molding blade 10 affect the mold releasability of the mold is generally considered from the mold release mechanism of the mold, It is preferable that the tread groove forming bone 8 and the kerf forming blade 10 are largely inclined toward the mating surface 2a side (toward the tread center line 15 side), that is, the inclination angle α and the inclination angle γ are large.
According to the inventor's experiments, the inclination angle α and the inclination angle γ
The minimum angle is 5°, and it was confirmed that if the angle is less than 5°, the mold release will not be smooth and the tread rubber will be damaged.
しかし、これらの傾斜角を過度に大きくする
と、成形されたタイヤの機能および商品価値を阻
害することになるので好ましくない。 However, it is not preferable to make these inclination angles excessively large, since this will impede the function and commercial value of the molded tire.
一般に、トレツド構成形骨８については、傾斜
角αと傾斜角βとの間に相関関係があり、傾斜角
βを変えないで傾斜角αのみを過度に大きくする
ことは、トレツド溝成形骨８の先端の曲率半径が
小さくなることになり、タイヤのトレツド溝底に
応力が集中し、これによるクラツクが発生して耐
久性を損なう原因となる。 In general, there is a correlation between the inclination angle α and the inclination angle β for the tread groove formed bone 8, and increasing only the inclination angle α excessively without changing the inclination angle β means that the tread groove formed bone 8 The radius of curvature at the tip of the tire becomes smaller, stress concentrates on the bottom of the tire's tread groove, and this causes cracks, which impairs durability.
そこで、傾斜角αを大きくするときは、傾斜角
βを小さくしてトレツド溝成形骨８の先端の曲率
半径を一定限度以上に保つ必要がある。そのため
には、傾斜角αと傾斜角βとの和が20°以下とな
るようにするのが好ましい。傾斜角βは金型から
の離型性には直接関係がないので、トレツド溝成
形骨８の側壁面８ｂをトレツド成形面６の法線よ
りもトレツド中心線１５側に傾けて、負値とする
こともできるが、傾斜角βを−5°以下にすると、
タイヤの摩耗が著しく早くなり、トレツドデザイ
ンの外観も損なわれるので好ましくない。 Therefore, when increasing the inclination angle α, it is necessary to reduce the inclination angle β to maintain the radius of curvature of the tip of the tread groove shaped bone 8 above a certain limit. For this purpose, it is preferable that the sum of the inclination angle α and the inclination angle β is 20° or less. Since the inclination angle β has no direct relation to the releasability from the mold, the side wall surface 8b of the tread groove forming bone 8 is inclined toward the tread center line 15 side with respect to the normal line of the tread forming surface 6, so that it has a negative value. However, if the inclination angle β is −5° or less,
This is undesirable because the tire wears out quickly and the appearance of the tread design is impaired.
以上の結果を綜合すると、傾斜角αは5°〜25°、
好ましくは10〜15°であり、傾斜角βは5°〜−5°、
好ましくは０〜5°である。 Combining the above results, the inclination angle α is 5° to 25°,
Preferably, it is 10 to 15°, and the inclination angle β is 5° to −5°,
Preferably it is 0-5°.
一方、カーフ成形刃１０については、傾斜角γ
が25°を超えると、第５図に示すように、タイヤ
が路面３０に接したときに、カーフ２５が閉塞し
て、その機能が十分に発揮されなくなり、横すべ
り抵抗が減少するので好ましくない。したがつ
て、傾斜角γは５〜25°とする必要があるが、好
ましい範囲は８〜12°である。 On the other hand, regarding the kerf forming blade 10, the inclination angle γ
If the angle exceeds 25°, as shown in FIG. 5, when the tire contacts the road surface 30, the kerf 25 closes and its function is not fully demonstrated, which is undesirable because the sideslip resistance decreases. Therefore, the inclination angle γ needs to be 5 to 25 degrees, but the preferred range is 8 to 12 degrees.
上記構成のソレツド構成形骨８とカーフ成形刃
１０とは、金型のトレツド成形面の全周に設けて
もよいが、部分的に設けることもできる。たとえ
ば、第６図に示すように、金型の円周方向を４等
分して４区域に区分された区域と区域のトレ
ツド成形面にこの発明のトレツド溝成形骨（傾斜
角α＝12°）を設け、区域と区域とに挟まれ
た区域と区域のトレツド成形面には従来のト
レツド溝成形骨（傾斜角α＝3°）を設けると、こ
の金型の離型時には対称位置にある区域と区
域とが、および区域よりも先行してタイヤ４
０から離型するから、および区域の離型も容
易であり、金型全体としての離型がきわめて円滑
となるため、従来のトレツド溝成形骨が部分的に
設けてあつても、その区域のトレツド溝成形骨が
タイヤのトレツドゴムに損傷を与えることはな
い。 The solenoid forming rib 8 and the kerf forming blade 10 configured as described above may be provided all around the tread forming surface of the mold, but they may also be provided partially. For example, as shown in FIG. 6, the tread groove forming bone of the present invention (inclination angle α = 12° ), and a conventional tread groove molding bone (inclination angle α = 3°) is provided on the tread molding surface of the region and the region sandwiched between the regions, and when the mold is released, it will be in a symmetrical position. The area and the area, and the tire 4 preceding the area.
Since the mold is released from zero, it is also easy to release the area, and the mold as a whole can be released very smoothly, so even if the conventional tread groove molding bone is partially provided, The tread groove molding bone will not damage the tread rubber of the tire.
この金型の円周方向の区分は、金型の全円周を
２〜６の偶数区域に略等分して、交互に１区域、
２区域、３区域をこの発明のトレツド成形面とす
るのが好ましく、４区域以上にこの発明のトレツ
ド成形面を配置するのは、返つて等分区域が狭く
なりすぎて離型性が悪くなるので好ましくない。 This mold is divided in the circumferential direction by dividing the entire circumference of the mold approximately equally into 2 to 6 even-numbered areas, and alternately dividing the entire circumference of the mold into 1 area,
It is preferable to use the tread molding surface of the present invention in 2 or 3 regions, and if the tread molding surface of the present invention is arranged in 4 or more regions, the equally divided regions will become too narrow and the mold releasability will deteriorate. So I don't like it.
さらに、上記の区域別の配置を下記のようにす
ることもできる。 Furthermore, the above-mentioned arrangement by area can also be made as follows.
すなわち、一般に金型のトレツド成形面におけ
るトレツドデザインは、主としてタイヤの走行時
の騒音を低減する目的で、各種の円周方向ピツチ
の異なるトレツドデザインを適宜組み合わせて配
置されているから、これらの異種ピツチのトレツ
ドデザインのうち、少なくとも１種のトレツドデ
ザインに属するトレツド溝成形骨とカーフ成形刃
とをこの発明の傾斜角とし、このピツチのトレツ
ドデザインを、金型の円周方向に複数区域配置し
てこのピツチのトレツドデザインを５〜20ピツチ
連続させ、他の区域には従来の傾斜角のトレツド
溝成形骨とカーフ成形刃とをもつピツチのトレツ
ドデザインのものを配置する。 In other words, the tread design on the tread molding surface of the mold is generally arranged by appropriately combining various tread designs with different circumferential pitches, mainly for the purpose of reducing noise when the tire is running. The tread groove molding bone and the kerf molding blade belonging to at least one tread design among the tread designs of different pitches are defined as the inclination angle of the present invention, and the tread design of this pitch is set in the circumferential direction of the mold. 5 to 20 pitches of this pitch tread design are arranged in multiple areas in a row, and in other areas, pitch tread designs with conventional tread groove molded bones and kerf molded blades are placed. do.
この発明の傾斜角をもつトレツドデザインのピ
ツチ数は、５ピツチ未満では金型の離型性の改善
の効果が得られず、20ピツチを超えるとタイヤの
走行時の騒音が増加するので好ましくない。少な
くとも７〜15ピツチ連続させて金型の円周方向に
交互に３区域配置するのが最も好適である。 The number of pitches in the tread design with an inclination angle of this invention is preferably less than 5 pitches, since the effect of improving the mold release property cannot be obtained, and when it exceeds 20 pitches, the noise during running of the tire increases. do not have. Most preferably, at least 7 to 15 consecutive pitches are arranged in three zones alternating in the circumferential direction of the mold.
上記の区域別配置のうち、前者の方法は、トレ
ツドデザインのピツチに関係なくこの発明を適用
するものであるから、同種ピツチのトレツドデザ
インであつても、この発明のものと従来のものと
を製作しなければならず、実質的にはピツチの種
類が倍増して金型の製造コストが上昇するが、後
者の方法によると、特定ピツチのトレツドデザイ
ンのみにこの発明を適用すればよく、金型の製造
コストを増加させずに、この発明の効果が発揮さ
れることになる。 Among the above-mentioned area-based layouts, the present invention is applied to the former method regardless of the pitch of the tread design, so even if the tread design has the same pitch, the one of this invention and the conventional one can be used. However, according to the latter method, if this invention is applied only to the tread design of a specific pitch, The effects of the present invention can be achieved without increasing the manufacturing cost of the mold.
以上、説明したところから明らかなように、こ
の発明は、二つ割り型のタイヤ成形用金型のトレ
ツド成形面に取付けるトレツド溝成形骨のシヨル
ダ成形面側の側壁面とカーフ成形刃とを、トレツ
ド中心線側に対して所定の角度で傾斜させる構成
としている。したがつて、この発明によれば、金
型の離型時にタイヤのトレツド溝あるいはカーフ
に大きな変形や損傷を与えずにタイヤから離型さ
せることができるから、離型性にすぐれたタイヤ
成形用金型を得ることが可能となる。またこの発
明によれば、トレツド溝成形骨のシヨルダ成形面
側の側壁面とカーフ成形刃との傾斜角は、タイヤ
の機能や外観を損なわない限度に設定してあるか
ら、高性能であつて商品価値の高いタイヤの加硫
成形が可能となる。 As is clear from the above description, the present invention has the following advantages: The side wall surface on the shoulder molding surface side of the tread groove molding bone and the kerf molding blade attached to the tread molding surface of a two-split tire mold It is configured to be inclined at a predetermined angle with respect to the line side. Therefore, according to the present invention, the mold can be released from the tire without major deformation or damage to the tread grooves or kerf of the tire when the mold is released. It becomes possible to obtain a mold. Further, according to the present invention, the angle of inclination between the side wall surface of the tread groove molding bone on the shoulder molding surface side and the kerf molding blade is set to a limit that does not impair the function or appearance of the tire. It becomes possible to vulcanize and mold tires with high commercial value.
第１図は、二つ割り金型の子午断面斜視図、第
２図はトレツド溝成形骨とタイヤとの離型時の状
態を示す拡大図、第３図は、二つ割り金型のトレ
ツド成形面を示す斜視図、第４図は、金型の子午
断面図、第５図は、タイヤの接地時の状態を示す
断面図、第６図は金型のトレツド中心線における
平面図である。
図中、６はトレツド成形面、７はシヨルダ成形
面、８はトレツド溝成形骨、８ａはトレツド溝成
形骨の側壁面、１０はカーフ成形刃、１５はトレ
ツド成形面の円周方向中心線、αはトレツド溝成
形骨の傾斜角、γはカーフ成形刃の傾斜角であ
る。
Figure 1 is a meridional cross-sectional perspective view of the halved mold, Figure 2 is an enlarged view showing the state of the tread groove forming bone and the tire when they are released from the mold, and Figure 3 is the tread forming surface of the halved mold. FIG. 4 is a perspective view, FIG. 4 is a meridional sectional view of the mold, FIG. 5 is a sectional view showing the state of the tire when it is in contact with the ground, and FIG. 6 is a plan view of the mold along the tread center line. In the figure, 6 is a tread forming surface, 7 is a shoulder forming surface, 8 is a tread groove forming bone, 8a is a side wall surface of the tread groove forming bone, 10 is a calf forming blade, 15 is a circumferential center line of the tread forming surface, α is the inclination angle of the tread groove forming bone, and γ is the inclination angle of the kerf forming blade.
Claims (1)
のうち少なくともトレツド溝成形骨をトレツド成
形面に取付けた二つ割り型のタイヤ成形用金型に
おいて、前記各条のトレツド溝成形骨とカーフ成
形刃とを、それぞれトレツド成形面の円周方向中
心線側に傾斜させて設け、金型の子午断面におけ
るトレツド成形面に立てた法線に対して前記トレ
ツド溝成形骨のシヨルダ成形面側の側壁面と前記
カーフ成形刃とがそれぞれなす角度を5°〜25°の
範囲としたことを特徴とするタイヤ成形用金型。 ２ 各トレツド溝成形骨のシヨルダ成形面側の側
壁面と各カーフ成形刃とが金型の子午断面におけ
るトレツド成形面の法線に対してなす角度が5°〜
25°である区域が、金型の円周方向を２〜６の偶
数区域に略等分したトレツド成形面に交互に配置
されている特許請求の範囲第１項記載のタイヤ成
形用金型。 ３ トレツド成形面の円周方向ピツチを異にする
複数種のトレツドデザインのうち、少なくとも１
種のトレツドデザインをもつ各トレツド溝成形骨
のシヨルダ成形面側の側壁面と各カーフ成形刃と
が金型の子午断面におけるトレツド成形面の法線
に対してなす角度が、5°〜25°であつて、少なく
とも５〜20ピツチ連続する区域が、金型の円周方
向に複数区域配置されている特許請求の範囲第１
項記載のタイヤ成形用金型。[Scope of Claims] 1. In a two-split tire molding die in which at least the tread groove forming bones of a plurality of tread groove forming bones and the kerf forming blade are attached to the tread forming surface, the tread groove forming of each of the abovementioned lines is provided. The bone and the kerf molding blade are provided so as to be inclined toward the center line in the circumferential direction of the tread molding surface, and the shoulder molding of the tread groove molding bone is performed with respect to the normal to the tread molding surface in the meridian section of the mold. A tire molding die characterized in that the angle between the surface side wall surface and the kerf molding blade is in the range of 5° to 25°. 2 The angle between the side wall surface of each tread groove molding bone on the shoulder molding surface side and each kerf molding blade with respect to the normal to the tread molding surface in the meridian section of the mold is 5° or more.
2. The tire molding mold according to claim 1, wherein the 25° zones are alternately arranged on a tread molding surface that divides the circumferential direction of the mold approximately equally into 2 to 6 even-numbered zones. 3 At least one of the multiple types of tread designs that differ in the circumferential pitch of the tread molding surface.
The angle between the side wall surface on the shoulder molding surface side of each tread groove molding bone having a different tread design and each kerf molding blade with respect to the normal to the tread molding surface in the meridian section of the mold is 5° to 25°. degree, and a plurality of continuous areas of at least 5 to 20 pitches are arranged in the circumferential direction of the mold.
The tire molding mold described in Section 1.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57209112A JPS5998834A (en) | 1982-11-29 | 1982-11-29 | Tire molding die |
| KR1019830005187A KR910005126B1 (en) | 1982-11-29 | 1983-11-01 | Tire molding die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57209112A JPS5998834A (en) | 1982-11-29 | 1982-11-29 | Tire molding die |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5998834A JPS5998834A (en) | 1984-06-07 |
| JPH0415086B2 true JPH0415086B2 (en) | 1992-03-16 |
Family
ID=16567482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57209112A Granted JPS5998834A (en) | 1982-11-29 | 1982-11-29 | Tire molding die |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS5998834A (en) |
| KR (1) | KR910005126B1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0234409A (en) * | 1988-07-22 | 1990-02-05 | Toyo Tire & Rubber Co Ltd | Pneumatic tire and its die for vulcanization molding |
| JP3636253B2 (en) * | 1996-09-11 | 2005-04-06 | 株式会社ブリヂストン | Mold for vulcanizing pneumatic tires |
| JP3895309B2 (en) * | 2003-07-28 | 2007-03-22 | 日本碍子株式会社 | Manufacturing method of tire molding die and tire molding die manufactured by the manufacturing method |
| JP5010385B2 (en) * | 2007-08-02 | 2012-08-29 | 東洋ゴム工業株式会社 | Tire molding die and pneumatic tire using the same |
| DE102013106886A1 (en) * | 2013-07-01 | 2015-01-08 | Continental Reifen Deutschland Gmbh | tire mold |
-
1982
- 1982-11-29 JP JP57209112A patent/JPS5998834A/en active Granted
-
1983
- 1983-11-01 KR KR1019830005187A patent/KR910005126B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5998834A (en) | 1984-06-07 |
| KR840006783A (en) | 1984-12-03 |
| KR910005126B1 (en) | 1991-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5095963A (en) | Tire treads | |
| JPH0743621U (en) | tire | |
| US4444713A (en) | Decorative ornamentation for a rubber article and method of making same | |
| JP2008007102A (en) | Tire with tread having sipes, and sipe blade for tire | |
| US6202725B1 (en) | Pneumatic tire and vulcanization mold used for the manufacture thereof | |
| JP4450793B2 (en) | Tire vulcanization mold and pneumatic tire | |
| JPH0415086B2 (en) | ||
| JPH01175507A (en) | Pneumatic tire | |
| JPH0536210B2 (en) | ||
| ATE257776T1 (en) | VEHICLE TIRES WITH CUTS IN THE TREAD AND SLAPS FOR VULCANIZATION MOLD AND VULCANIZATION MOLD WITH SUCH SLAPS | |
| JPH03153406A (en) | Pneumatic tire with hidden sipe and manufacture thereof | |
| JPH0342306A (en) | Pneumatic tire | |
| JPH05246215A (en) | Pneumatic tire and manufacture therefor | |
| JPH0447907A (en) | Mold for molding heavy duty pneumatic tire and heavy duty pneumatic tire made thereby | |
| JP4169562B2 (en) | Tire molding mold and pneumatic tire | |
| JPH039817A (en) | Pneumatic tire and its molding die | |
| JPH0688253B2 (en) | Tire mold | |
| JPH10272906A (en) | Pneumatic tire and mold for forming such tire | |
| JPS58128905A (en) | Tread form for vehicle pneumatic tire | |
| JPS62242508A (en) | Manufacture of pneumatic tire for heavy load | |
| KR100473249B1 (en) | Tread Pattern for a Heavy Duty Pneumatic Radial Tire | |
| JPH0596654A (en) | Precured tread for reclaimed tire, its manufacture and reclaimed tire for which it is used | |
| US10821689B2 (en) | Mold for molding tire and pneumatic tire | |
| JPH06102404B2 (en) | Pneumatic tire | |
| JPH0323911A (en) | Manufacture of pneumatic tire |