JPS6031642B2 - Method for shortening vulcanization time of rubber articles - Google Patents
Method for shortening vulcanization time of rubber articlesInfo
- Publication number
- JPS6031642B2 JPS6031642B2 JP6799482A JP6799482A JPS6031642B2 JP S6031642 B2 JPS6031642 B2 JP S6031642B2 JP 6799482 A JP6799482 A JP 6799482A JP 6799482 A JP6799482 A JP 6799482A JP S6031642 B2 JPS6031642 B2 JP S6031642B2
- Authority
- JP
- Japan
- Prior art keywords
- vulcanization
- rubber
- rubber articles
- time
- vulcanization time
- 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
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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
- B29C35/049—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using steam or damp
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2021/00—Use of unspecified rubbers as moulding material
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- 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】
この発明はゴム物品の加硫機による加硫時間を短縮する
方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION This invention relates to a method for shortening the vulcanization time of rubber articles in a vulcanizer.
従来、配合ゴムの加硫反応を促進するには、加硫促進剤
が広く使われている。Conventionally, vulcanization accelerators have been widely used to accelerate the vulcanization reaction of compounded rubber.
加稀促進剤は自身が分解して加硫反応を促進する。一般
に加硫反応は遠く進行すれば加硫時間がそれだけ短縮さ
れるので生産性が向上する。配合ゴムの加硫速度を速め
るには加硫剤又は加硫促進剤の配合量を増加する方法が
一般に知られているが、その量が多過ぎると加硫工程に
達する前に、例えば濠練や熱入れ時に加硫が進行して、
いわゆるスコーチ（焼け）を起こす問題がある。従って
加硫促進剤などの配合量を増すことには限度がある。こ
の発明は、従来使用されている加硫促進剤を使用し、ま
たその配合量も上記のような焼けを起こさないように従
来と同程度の配合量のままで、加硫機における加稀時間
を短縮できるェラストマー又はゴム物品の加硫時間短縮
方法を提供することを目的とする。The curing accelerator itself decomposes and promotes the vulcanization reaction. Generally, the further the vulcanization reaction progresses, the shorter the vulcanization time is, which improves productivity. In order to speed up the vulcanization rate of compounded rubber, it is generally known to increase the amount of vulcanizing agent or vulcanization accelerator, but if the amount is too large, it may be necessary to Vulcanization progresses during heating and
There is a problem of causing so-called scorch (burning). Therefore, there is a limit to increasing the amount of vulcanization accelerators and the like. This invention uses a conventionally used vulcanization accelerator, and the amount of the accelerator is kept at the same level as before so as not to cause the above-mentioned burning, and the vulcanization time in the vulcanizer is shortened. An object of the present invention is to provide a method for shortening the vulcanization time of an elastomer or rubber article.
この発明の方法の概要は、加硫促進剤を配合された配合
ゴムを、７０％以上の湿度及び５０℃以上の温度の所定
雰囲気中に所定時間保持した後、加硫工程に移ることを
特徴とする。The outline of the method of the present invention is that the compounded rubber containing a vulcanization accelerator is held in a predetermined atmosphere with a humidity of 70% or more and a temperature of 50°C or more for a predetermined period of time, and then moves to a vulcanization step. shall be.
上記加硫促進剤としては、Ｎ−シクロヘキシルー２ーベ
ンゾチアゾリルスルフエンアミド、２ーメルカプトベン
ゾチアゾール、テトラメチルチウラムジスルフイド、Ｎ
−ブチルアルデヒドアニリン、Ｎ、Ｎ′−ジフェニルチ
オ尿素、１、３−ジフェニルグアニジン等が挙げられる
が、これ等に限定されない。The vulcanization accelerators include N-cyclohexy-2-benzothiazolylsulfenamide, 2-mercaptobenzothiazole, tetramethylthiuram disulfide, N
Examples include, but are not limited to, -butyraldehyde aniline, N,N'-diphenylthiourea, 1,3-diphenylguanidine, and the like.
これは、所定の湿熱条件下で分解し、配合ゴム中の促進
肋剤（亜鉛華）と反応してＺｎ塩化合物を作り、これが
硫黄の分子のリングを開環し、その結果硫黄は配合ゴム
中の炭素原子と加熱（１００００以上）下で直ちに結合
（架橋）可能状態となるので、従ってこの状態が加硫工
程に入る段階ですでに生成しているときは、加硫工程に
移ると直ちに架橋反応が進行し、それだけ加腕時間は短
縮されることになる。しかし、従来のいわゆる予熱工程
では、加硫促進剤はあまり分解しておらず、加硫工程に
入り昇温によって始めて本格的に分解して加硫を促進す
る。上記湿熱雰囲気としては、例えば第１図に原理的に
示すように、温度と湿度をコントロールされたオーブン
１と、このオープンを貫通し、例えば成型工程から加硫
工程に通ずるベルトコンベァ２とからなる湿熱装置を用
いる。It decomposes under specified moist heat conditions and reacts with the accelerator (zinc white) in the compounded rubber to form a Zn salt compound, which opens the sulfur molecular ring, so that the sulfur is released into the compounded rubber. When heated (more than 10,000 carbon atoms), it immediately becomes possible to bond (crosslink) with the carbon atoms in the vulcanization process. The crosslinking reaction progresses, and the arming time is shortened accordingly. However, in the conventional so-called preheating process, the vulcanization accelerator is not decomposed much, and it is not until the vulcanization process begins and the temperature is raised that it fully decomposes and accelerates vulcanization. The above-mentioned moist heat atmosphere includes, for example, as shown in principle in Fig. 1, a moist heat atmosphere consisting of an oven 1 whose temperature and humidity are controlled, and a belt conveyor 2 that passes through this opening and leads from the molding process to the vulcanization process, for example. using equipment.
オーブン’にはコンベア２上の上段に側溢部３と側温部
４とが取付けられ、これらは湿熱記録部５と湿熱制御部
６とに電気的に連結されている。コンベア２の下段にフ
ァン７を取付け、ファン７の下段に上下一対のヒーター
８，９を設け、下方のヒーター９は水１０内に水没させ
、ヒーター８，９は湿熱制御部６に連結されている。ヒ
ーターにより発生した水蒸気はファン７により上方に強
制的に送られ、コンベア２上を移送される例えば成形ず
みで禾加稀のテキスタイルコードタイヤ１１を加熱加湿
した後、ダクト１２を通って循環するようになっている
。湿度は０〜１００％であり、また温度は一般的には２
０〜２００００程度である。この湿度及び温度を各々所
定値とすること、並びにその湿熱雰囲気中に所定時間保
持することは、これによって配合ゴム中における加硫促
進剤の分解量を一定にすることができ、その結果加稀時
間の夏冬の季節変動を一定にでき、加硫後のゴム物性の
均一性を良くすることができる。なお、従来加硫直前に
行う予熱工程は予定した温度にまで加硫物品全体の温度
を上昇させておくに止まり、この発明における湿熱処理
とは根本的に異っている。A side overflow section 3 and a side heating section 4 are attached to the upper stage above the conveyor 2 in the oven', and these are electrically connected to a moist heat recording section 5 and a moist heat control section 6. A fan 7 is attached to the lower stage of the conveyor 2, a pair of upper and lower heaters 8 and 9 are provided at the lower stage of the fan 7, the lower heater 9 is submerged in water 10, and the heaters 8 and 9 are connected to the moist heat control section 6. There is. The water vapor generated by the heater is forcibly sent upward by a fan 7, heats and humidifies, for example, a molded and hardened textile cord tire 11 transferred on a conveyor 2, and then circulates through a duct 12. It has become. Humidity is 0-100%, and temperature is generally 2
It is about 0 to 20,000. By setting the humidity and temperature to predetermined values and maintaining the humidity and heat atmosphere for a predetermined time, it is possible to keep the decomposition amount of the vulcanization accelerator in the compounded rubber constant, and as a result, the vulcanization accelerator is Seasonal fluctuations in time between summer and winter can be made constant, and the uniformity of the physical properties of the rubber after vulcanization can be improved. Note that the conventional preheating step performed immediately before vulcanization merely raises the temperature of the entire vulcanized article to a predetermined temperature, and is fundamentally different from the moist heat treatment in the present invention.
つまり、従来の予熱は加硫型内での昇溢に要する時間を
短縮するのであり、湿度の制御はなされていない。従っ
て加硫促進剤もあまり分解しておらず。加硫工程に移っ
ても直ちに加硫促進効果を奏し得ない状態である。次に
この発明の実施例及び比較例を示す。That is, conventional preheating shortens the time required for overflow in the vulcanization mold, and does not provide humidity control. Therefore, the vulcanization accelerator was not significantly decomposed. Even if the vulcanization process is started, the vulcanization promotion effect cannot be immediately achieved. Next, examples and comparative examples of the present invention will be shown.
実施例１、２、３及び比較例１は同じ配合ゴムの同じタ
イヤ（１６５ＳＲ１３乗用車用チューブレスタィヤ、ポ
リエステルカーカスプライ）に関するものであり、比較
例１の処理内容は従来行われている通りの子熱処理を受
けたものであり、実施例１、２、３の処理内容は前記装
置を用いて虚熱処理を受けたものである。なお、上記実
施例で加硫温度はいずれも１６０００である。Examples 1, 2, and 3 and Comparative Example 1 are related to the same tire (165SR13 tubeless tire for passenger cars, polyester carcass ply) made of the same rubber compound, and the processing details of Comparative Example 1 are the same as those conventionally performed. The samples in Examples 1, 2, and 3 were subjected to imaginary heat treatment using the above-mentioned apparatus. In addition, the vulcanization temperature in all of the above examples is 16,000.
上記実施例１、２から、処理雰囲気は湿度が高い方がよ
り効果的であることが理解され、また実施例１、２、３
と比較例１から、湿度を高くすれば加硫機における加硫
時間を従来よりも１０％前後は短縮可能であることが理
解される。From Examples 1 and 2 above, it is understood that the higher the humidity of the treatment atmosphere, the more effective it is.
From Comparative Example 1, it is understood that by increasing the humidity, the vulcanization time in the vulcanizer can be shortened by about 10% compared to the conventional vulcanizer.
この効果の程度を考慮すれば、実用的な処理雰囲気の湿
度は７０％以上が望まれる。上記実施例はタイヤに関す
るものであるが、このほかにゴムホース、ゴムベルト、
防豚材、ゴムマット等のゴム物品の製造において実施可
能である。Considering the degree of this effect, it is desirable that the humidity of the practical processing atmosphere be 70% or more. The above embodiments relate to tires, but other examples include rubber hoses, rubber belts,
It can be implemented in the production of rubber articles such as pig protection materials and rubber mats.
上述したように、この発明によるときは、加硫可能なゴ
ム物品を加硫前に湿熱処理を行うだけで加硫機における
加硫反応を促進させて加稀時間を短縮できて高価な加硫
設備の稼働効率を向上させることができ、又、夏冬の加
稀時間の季節変動を吸収できるのでゴム物品の品質向上
に寄与し、更に、従来方法におけるゴム焼けによる不良
品の大幅な減少を図ることができる。As described above, according to the present invention, by simply subjecting a vulcanizable rubber article to wet heat treatment before vulcanization, the vulcanization reaction in the vulcanizer can be accelerated and the vulcanization time can be shortened, thereby eliminating the need for expensive vulcanization. It can improve the operating efficiency of equipment, and it can absorb seasonal fluctuations in heating times in summer and winter, contributing to improving the quality of rubber products.Furthermore, it can significantly reduce the number of defective products due to rubber burnt in conventional methods. can be achieved.
図はこの発明の方法に使用する湿熱処理装置の１例を示
す概略構成図である。
１……オーブン、２……ベルトコンベア、３…・・・欄
溢部、４・・・・・・欄温部、５・・・・・・湿熱記録
部、６・・・・・・湿熱制御部、７・・・・・・ファン
、８，９・・・・・・ヒ−ター、１０……水、１１……
タイヤ、１２……ダクト。The figure is a schematic configuration diagram showing an example of a moist heat treatment apparatus used in the method of the present invention. 1... Oven, 2... Belt conveyor, 3... Column overflow section, 4... Column temperature section, 5... Moist heat recording section, 6... Moist heat Control unit, 7... Fan, 8, 9... Heater, 10... Water, 11...
Tire, 12...Duct.
Claims (1)
湿度及び５０℃以上の温度の所定雰囲気中に所定時間保
持した後、加硫工程に移ることを特徴とするゴム物品の
加硫時間短縮法。1. Vulcanization of rubber articles, characterized in that a compounded rubber containing a vulcanization accelerator is held in a predetermined atmosphere with a humidity of 70% or more and a temperature of 50° C. or more for a predetermined period of time, and then the process proceeds to a vulcanization process. Time saving method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6799482A JPS6031642B2 (en) | 1982-04-21 | 1982-04-21 | Method for shortening vulcanization time of rubber articles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6799482A JPS6031642B2 (en) | 1982-04-21 | 1982-04-21 | Method for shortening vulcanization time of rubber articles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58183237A JPS58183237A (en) | 1983-10-26 |
| JPS6031642B2 true JPS6031642B2 (en) | 1985-07-23 |
Family
ID=13361022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6799482A Expired JPS6031642B2 (en) | 1982-04-21 | 1982-04-21 | Method for shortening vulcanization time of rubber articles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6031642B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04201706A (en) * | 1990-11-30 | 1992-07-22 | Okamoto Ind Inc | Method for manufacturing slip prevention net |
| CN108015940B (en) * | 2018-01-26 | 2019-12-06 | 黄德修 | circulating steam pipe crosslinking equipment |
| CN115524359B (en) * | 2022-11-25 | 2023-03-10 | 广东粤港澳大湾区黄埔材料研究院 | Method for quantitatively shortening vulcanization time of rubber product and application thereof |
-
1982
- 1982-04-21 JP JP6799482A patent/JPS6031642B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58183237A (en) | 1983-10-26 |
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