JPH0223329B2 - - Google Patents
Info
- Publication number
- JPH0223329B2 JPH0223329B2 JP11170083A JP11170083A JPH0223329B2 JP H0223329 B2 JPH0223329 B2 JP H0223329B2 JP 11170083 A JP11170083 A JP 11170083A JP 11170083 A JP11170083 A JP 11170083A JP H0223329 B2 JPH0223329 B2 JP H0223329B2
- Authority
- JP
- Japan
- Prior art keywords
- bladder
- tire
- internal pressure
- cooling water
- steam
- 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
- 238000000034 method Methods 0.000 claims description 17
- 239000000498 cooling water Substances 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 9
- 238000004073 vulcanization Methods 0.000 claims description 8
- 239000007789 gas Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Description
【発明の詳細な説明】
(産業上の利用分野)
この発明は冷却工程を含むタイヤ加硫方法に関
する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) This invention relates to a tire vulcanization method including a cooling step.
(従来技術)
従来、この種のタイヤ加硫方法としては、第1
図に示すように、金型1内に装填したタイヤ2
を、ブラダー3内に注入した冷却水4で冷却する
ようにしたものが一般によく知られている。(Prior art) Conventionally, as this type of tire vulcanization method, the first
As shown in the figure, a tire 2 loaded into a mold 1
It is generally well known that the cooling water 4 is cooled by cooling water 4 injected into the bladder 3.
しかしながら、上記従来のタイヤ加硫方法で
は、ブラダー3内に冷却水4を注入するとき、ブ
ラダー3内の内圧媒体、特に低熱容量気体の場合
これを完全に抜くことができず、ブラダー3内に
内圧媒体5がどうしても残留し、そのため、第2
図(第2図中曲線A,B,Cは夫々第1図中の部
位A,B,Cに対応する。)に示すように、残留
内圧媒体の存する部分Aが十分に冷却されず、タ
イヤが均一に冷却されず、ナイロンコードの強度
低下を招き、品質が低下するという欠点があつ
た。 However, in the conventional tire curing method described above, when the cooling water 4 is injected into the bladder 3, the internal pressure medium in the bladder 3, especially in the case of a low heat capacity gas, cannot be completely evacuated. The internal pressure medium 5 inevitably remains, and therefore the second
As shown in the figure (curves A, B, and C in Figure 2 correspond to parts A, B, and C in Figure 1, respectively), part A where the residual internal pressure medium exists is not cooled sufficiently, and the tire The problem was that the nylon cord was not cooled uniformly, leading to a decrease in the strength of the nylon cord and resulting in a decrease in quality.
そこで、ブラダー内にスチームをブローして、
ブラダー内の内圧媒体を強制的に排出する方法が
考えられるが、このようにした場合、短時間のブ
ローでは内圧媒体が溜まりが完全にとれないとい
う問題がある。また、このようにスチームのブロ
ーで内圧媒体を排出した後、次工程で冷却水の供
給を開始すると、ブラダー内のブロー用のスチー
ムが急激に冷却されて、瞬間的にブラダーの内圧
が低下して、タイヤコードの強度が低下し易いと
いう欠点がある。 Therefore, blow steam into the bladder,
A method of forcibly discharging the internal pressure medium in the bladder may be considered, but in this case, there is a problem that the accumulation of internal pressure medium cannot be completely removed by blowing for a short time. In addition, when the supply of cooling water is started in the next process after discharging the internal pressure medium by steam blowing, the blowing steam inside the bladder is rapidly cooled, causing the internal pressure of the bladder to drop instantaneously. However, there is a drawback that the strength of the tire cord tends to decrease.
(発明の目的)
そこで、この発明の目的は、冷却工程直前に、
短時間でブラダー内の気体を完全に抜いて、タイ
ヤを均一かつ十分に冷却し得、かつ冷却水の注入
時にブラダー内の圧力が急激に変化しないように
して、タイヤの品質を向上させることにある。(Object of the invention) Therefore, the object of the invention is to
The gas inside the bladder can be completely removed in a short period of time to cool the tire uniformly and sufficiently, and the pressure inside the bladder will not change suddenly when cooling water is injected, improving the quality of the tire. be.
(発明の構成)
上記目的を達成するため、この発明の構成は、
金型内に装填したタイヤをブラダーを介して冷却
水で冷却する冷却工程の直前に、上記ブラダー内
の内圧媒体を所定値以下にならないように保持し
つつ、上記タイヤの内面とブラダーとの間に追出
用高圧気体を圧入して上記ブラダーを収縮させ
て、上記ブラダー内の内圧媒体を排出し、次い
で、上記タイヤの内面とブラダーとの間の追出用
高圧気体を所定値以下にならないように保持しつ
つ、上記タイヤ内に冷却水を圧入するようにした
点に特徴を有する。(Structure of the invention) In order to achieve the above object, the structure of this invention is as follows.
Immediately before the cooling process in which the tire loaded in the mold is cooled with cooling water through the bladder, the pressure between the inner surface of the tire and the bladder is maintained while maintaining the internal pressure medium in the bladder so as not to fall below a predetermined value. Pressurizing high-pressure gas for expulsion into the bladder to deflate the bladder to discharge the internal pressure medium in the bladder, and then ensuring that the high-pressure gas for expulsion between the inner surface of the tire and the bladder does not fall below a predetermined value. The tire is characterized in that cooling water is press-injected into the tire while the tire is held in the same position.
(実施例)
以下、この発明を図示の実施例により詳細に説
明する。(Example) Hereinafter, the present invention will be explained in detail with reference to illustrated examples.
この実施例に用いる装置は、第3図に示すよう
に、上型7と下型8とからなつて、タイヤ2が装
填される金型1と、上記タイヤ2を金型1内面に
押し付けて型付けるブラダー3と、上記ブラダー
を支持する上、下ブラダーリング11,12とを
備え、さらに、上記上、下ブラダーリング11,
12に、ブラダー3とタイヤ2の内面との間に追
出用気体の一例としてのスチームを導入する通路
15,15を備えている。 As shown in FIG. 3, the apparatus used in this embodiment consists of an upper mold 7 and a lower mold 8, a mold 1 into which a tire 2 is loaded, and a mold 1 that presses the tire 2 against the inner surface of the mold 1. It includes a molding bladder 3, and upper and lower bladder rings 11 and 12 that support the bladder, and further includes the upper and lower bladder rings 11,
12 is provided with passages 15, 15 for introducing steam as an example of expelling gas between the bladder 3 and the inner surface of the tire 2.
そして、このタイヤ加硫方法は、第4図に示す
ような工程を行なう。まず、周知のスチーム工程
と低熱容量気体工程とからなる加熱工程を行な
う。 In this tire vulcanization method, the steps shown in FIG. 4 are performed. First, a heating process consisting of a well-known steam process and a low heat capacity gas process is performed.
そして、低熱容量気体工程が終り冷却水の供給
開始1分前(タイヤ制御による)に、第3図に示
すバルブV4を開き、17Kg/cm2のスチームを、上
下から通路15,15を通して、タイヤ2の内面
とブラダー3との間に圧入開始する。この圧入開
始から5秒経過後、バルブV6を開き、オリフイ
ス17でブラダー3内の圧力が10Kg/cm2以下にな
らないように調節しつつ、ブラダー3内の内圧媒
体を徐々に抜く。このようにブラダー3内の内圧
媒体圧力を10Kg/cm2以下にならないように保持す
るのは、もし10Kg/cm2以下になると、ダブルモー
ルテイングやタイヤ内のコードが変位して、タイ
ヤ2の品質に悪影響を与えるからである。ブラダ
ー3内の内圧媒体5を抜き始めてから、1分経過
後、第5図に示すように、ブラダー3内の内圧媒
体5が完全に排気され、タイヤ2とブラダー3と
の間にスチーム21が充満する。 Then, one minute before the end of the low heat capacity gas step and the start of cooling water supply (by tire control), valve V 4 shown in Fig. 3 is opened, and 17 kg/cm 2 of steam is passed through the passages 15 and 15 from above and below. Pressure fitting between the inner surface of the tire 2 and the bladder 3 begins. After 5 seconds have elapsed from the start of this press-fitting, the valve V 6 is opened, and the internal pressure medium in the bladder 3 is gradually removed while adjusting the pressure in the bladder 3 using the orifice 17 so that it does not fall below 10 kg/cm 2 . The reason why the internal pressure inside the bladder 3 is maintained so that it does not go below 10 kg/cm 2 is that if it goes below 10 kg/cm 2 , the double molding or the cord inside the tire will be displaced, and the tire 2 will be damaged. This is because it adversely affects quality. One minute after the internal pressure medium 5 in the bladder 3 is started to be removed, the internal pressure medium 5 in the bladder 3 is completely exhausted and steam 21 is generated between the tire 2 and the bladder 3, as shown in FIG. Fill up.
その後、冷却工程に入り、バルブV3を開いて、
第6図に示すように、冷却水4の供給をスタート
する。このスタートから2秒経過後、バルブV5
を開いて、タイヤ2の内面とブラダー3との間の
スチーム21を、タイヤ2に対する押付力を失な
わないようにするため、オリフイス22によりス
チーム圧力が10Kg/cm2以下にならないように調節
しつつ徐々に抜く。このように、冷却工程に移行
し、さらにバルブV8を開き冷却水を循環させ、
その後V6を開いて、通常の排気工程に移行し、
金型1を開放して、タイヤ2を取り出す。このよ
うにして、加硫されたタイヤ2は、第7図(第7
図中の曲線A,B,Cは夫々第3,5,6図中の
部位A,B,Cに対応する。)に示すように、追
出用スチーム21の注入による残留内圧媒体の排
出により、タイヤ各部位の温度つまり加硫量が略
等しくなることがわかる。したがつて、タイヤ2
の品質の向上と、冷却期間の短縮による生産性の
向上とが達成される。 Then enter the cooling process, open valve V 3 ,
As shown in FIG. 6, the supply of cooling water 4 is started. After 2 seconds from this start, valve V 5
In order to prevent the steam 21 between the inner surface of the tire 2 and the bladder 3 from losing its pressing force against the tire 2, the steam pressure is adjusted using the orifice 22 so that the steam pressure does not fall below 10 kg/ cm2 . Remove it gradually. In this way, we move on to the cooling process and open valve V8 to circulate the cooling water.
After that, open the V 6 and move on to the normal exhaust process,
Open the mold 1 and take out the tire 2. The vulcanized tire 2 is thus cured as shown in FIG.
Curves A, B, and C in the figure correspond to portions A, B, and C in Figures 3, 5, and 6, respectively. ), it can be seen that by discharging the residual internal pressure medium by injecting the expulsion steam 21, the temperature, that is, the amount of vulcanization in each part of the tire becomes approximately equal. Therefore, tire 2
This results in improved quality and improved productivity by shortening the cooling period.
上記実施例においては、追出用の気体としてス
チームを用いたため、もし、タイヤ2の内面とブ
ラダー3との間にスチーム21が残つたとして
も、このスチーム21は冷却水4により冷却され
て水滴となり、タイヤ2の内面とブラダー3との
間に空気層ができることがなく、したがつて、冷
却不良を発生させることなく、タイヤ2を均一か
つ迅速に冷却することができる。 In the above embodiment, since steam is used as the expelling gas, even if steam 21 remains between the inner surface of the tire 2 and the bladder 3, this steam 21 is cooled by the cooling water 4 and drops into water droplets. Therefore, no air layer is formed between the inner surface of the tire 2 and the bladder 3, and therefore, the tire 2 can be cooled uniformly and quickly without causing cooling failure.
上記実施例では、追出用の気体として、スチー
ムを用いたが他の気体例えば空気又は液体例えば
水などを用いてもよい。尚、低熱容量気体とは例
えば窒素ガス等である。 In the above embodiments, steam is used as the expelling gas, but other gases such as air or liquids such as water may also be used. Note that the low heat capacity gas is, for example, nitrogen gas.
(発明の効果)
この発明のタイヤ加硫方法は、前述の如く構成
しているので、タイヤを均一かつ十分に冷却で
き、タイヤの品質を向上でき、しかも生産性を向
上できる。(Effects of the Invention) Since the tire vulcanization method of the present invention is configured as described above, the tire can be cooled uniformly and sufficiently, the quality of the tire can be improved, and productivity can be improved.
第1図は従来のタイヤ加硫方法の説明図、第2
図は上記方法の特性図、第3図はこの発明の一実
施例に用いる装置の断面図、第4図は上記実施例
の工程説明図、第5,6図は夫々第3図に示す装
置の動作説明図、第7図は上記実施例の特性図で
ある。
1……金型、2……タイヤ、3……ブラダー、
4……冷却水、5……低熱容量気体、17,22
……オリフイス、21……追出用ガス。
Figure 1 is an explanatory diagram of the conventional tire vulcanization method, Figure 2
The figure is a characteristic diagram of the above method, FIG. 3 is a sectional view of a device used in an embodiment of the present invention, FIG. 4 is a process explanatory diagram of the above embodiment, and FIGS. FIG. 7 is a characteristic diagram of the above embodiment. 1... Mold, 2... Tire, 3... Bladder,
4...Cooling water, 5...Low heat capacity gas, 17,22
...Orifice, 21... Gas for expulsion.
Claims (1)
冷却水で冷却する冷却工程を含むタイヤ加硫方法
において、 上記冷却工程の直前に、上記ブラダー内の内圧
媒体の圧力を所定値以下にならないように保持し
つつ、上記タイヤの内面とブラダーとの間に追出
用高圧気体を圧入して上記ブラダーを収縮させ
て、上記ブラダー内の内圧媒体を排出し、次い
で、上記タイヤ内面とブラダーとの間の追出用高
圧気体を所定値以下にならないように保持しつ
つ、上記ブラダー内に冷却水を圧入するようにし
たことを特徴とするタイヤ加硫方法。[Claims] 1. In a tire vulcanization method including a cooling step of cooling a tire loaded in a mold with cooling water via a bladder, immediately before the cooling step, the pressure of the internal pressure medium in the bladder is reduced. While maintaining the pressure so as not to fall below a predetermined value, expulsion high-pressure gas is injected between the inner surface of the tire and the bladder to contract the bladder and discharge the internal pressure medium in the bladder, and then A tire vulcanization method characterized in that cooling water is pressurized into the bladder while maintaining a high pressure expelling gas between the inner surface of the tire and the bladder so as not to fall below a predetermined value.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11170083A JPS602317A (en) | 1983-06-20 | 1983-06-20 | Method of vulcanizing tire |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11170083A JPS602317A (en) | 1983-06-20 | 1983-06-20 | Method of vulcanizing tire |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS602317A JPS602317A (en) | 1985-01-08 |
JPH0223329B2 true JPH0223329B2 (en) | 1990-05-23 |
Family
ID=14567935
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11170083A Granted JPS602317A (en) | 1983-06-20 | 1983-06-20 | Method of vulcanizing tire |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS602317A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100241629B1 (en) * | 1997-09-08 | 2000-02-01 | 홍건희 | A gas vulcanization system of a tyre |
JP2001009848A (en) * | 1999-04-28 | 2001-01-16 | Fuji Seiko Kk | Postcure inflator and method for cooling tire after vulcanization |
JP3404359B2 (en) * | 2000-05-11 | 2003-05-06 | 不二精工株式会社 | Post cure inflator and method of cooling tire after vulcanization |
-
1983
- 1983-06-20 JP JP11170083A patent/JPS602317A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS602317A (en) | 1985-01-08 |
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