JPS6251407A - Shortening time of vulcanizing solid tyre - Google Patents
Shortening time of vulcanizing solid tyreInfo
- Publication number
- JPS6251407A JPS6251407A JP60192615A JP19261585A JPS6251407A JP S6251407 A JPS6251407 A JP S6251407A JP 60192615 A JP60192615 A JP 60192615A JP 19261585 A JP19261585 A JP 19261585A JP S6251407 A JPS6251407 A JP S6251407A
- Authority
- JP
- Japan
- Prior art keywords
- tire
- vulcanizing
- time
- preheated
- raw cover
- 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.)
- Granted
Links
- 239000007787 solid Substances 0.000 title claims abstract description 12
- 238000004904 shortening Methods 0.000 title claims description 3
- 238000000034 method Methods 0.000 claims abstract description 11
- 125000006850 spacer group Chemical group 0.000 claims abstract description 10
- 239000011241 protective layer Substances 0.000 claims abstract description 5
- 238000004073 vulcanization Methods 0.000 claims description 18
- 239000002184 metal Substances 0.000 abstract description 4
- 239000004744 fabric Substances 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 description 3
- 238000001723 curing Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000001934 delay Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Tyre Moulding (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明はフォークリフト等の産業車両用に用いられる
ニューマチック型ソリッドタイヤの加硫時間短縮方法に
関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for shortening the vulcanization time of pneumatic solid tires used for industrial vehicles such as forklifts.
一般にニューマチック型ソリッドタイヤの製造は、タイ
ヤの最終製品の形に近似して成形されたローカバーを加
硫金型で所定時間加硫して行われるが、ソリッドタイヤ
は肉厚であるため、タイヤ中心部は熱伝導の遅れにより
タイヤ表面よりも加硫がおくれるとともに、加硫時間そ
のものも通常の空気入りタイヤに比べて長時間を要する
。この加硫時間を短縮するため従来から加硫金型で加硫
するに先だち前記ローカバーを予熱する方法が採用され
ているが、タイヤの肉厚が厚い為予熱後、タイヤ中心部
は充分予熱されておらず、一方タイヤ中心部まで予熱を
充分実施するとローカバー表面がスコーチ現象を起こし
外観不良となる。Generally, pneumatic solid tires are manufactured by vulcanizing a low cover molded to approximate the shape of the final tire product in a vulcanization mold for a predetermined period of time. Vulcanization takes longer in the center than on the surface of the tire due to delays in heat conduction, and the vulcanization time itself also takes longer than in regular pneumatic tires. In order to shorten this vulcanization time, a method has traditionally been adopted in which the low cover is preheated before being vulcanized in a vulcanization mold, but because the tire is thick, the center of the tire is not sufficiently preheated after preheating. On the other hand, if the center of the tire is sufficiently preheated, the surface of the low cover will undergo a scorch phenomenon, resulting in poor appearance.
この発明は従来の加硫方法における熱伝導の遅れに起因
するタイヤ中心部とタイヤ表面の昇温のバラツキを軽減
し、かつ加硫時間を短縮したソリッドタイヤの製造方法
に関する。The present invention relates to a solid tire manufacturing method that reduces the variation in temperature rise between the tire center and tire surface caused by delays in heat conduction in conventional vulcanization methods, and shortens vulcanization time.
この発明はベース部及びトレッド部のローカバー、又は
トレッド部のローカバーのみをタイヤ半径方向に部分的
又は全体的に分割して成形し、所定時間及び温度で予熱
し、しかる後金型で加硫することを特徴とするソリッド
タイヤの加硫方法に関する。In this invention, the low cover of the base part and tread part, or only the low cover of the tread part, is molded partially or completely in the radial direction of the tire, preheated at a predetermined time and temperature, and then vulcanized in a mold. The present invention relates to a solid tire vulcanization method characterized by the following.
以下図面に従ってこの発明の詳細な説明する。The present invention will be described in detail below with reference to the drawings.
第１図、及び第２図は本発明の方法における予熱時のタ
イヤ断面形状を示す、ソリッドタイヤはリムに当接嵌合
されるベース部２と路面と接地する側に配置されるトレ
ッド部３の二層で構成されるが、前記ベース部２はリム
との嵌合力を強固にする為、短繊維などで補強したゴム
配合が採用され、一方トレッド部は接地特性、例えば耐
摩耗性、耐チッピング性、耐損傷性を高めるためのゴム
配合が採用されている。そしてベース部は未加硫ゴムシ
ートの帯状体をタイヤ周方向に複数回巻きつけて、所定
厚みのベースゴム２を形成し、更にその上に別のａｍの
未加硫ゴムシートの帯状体をタイヤ周方向に複数回巻つ
けてトレッド部３を形成し、タイヤローカバー４を成形
する。次にこのローカバー４を温度上昇の最もおくれる
タイヤ赤道近傍でタイヤ半径方向に切断し、その切断面
に複数１固のスペーサ５を挿入する。このスペーサ５は
環状あるいは円弧状のもの、更に角型又は丸型の棒状体
又はクサビ状体であってもよく、その材料は金属、木材
、プラスチック等が使用できる。このスペーサ５を前記
切断面に配置することによりトレッド部表面の切断面間
隔Ｗは少なくとも１０鶴必要であり、これより小さいと
熱の伝導が効果的に行われない、なお切断面には予熱後
の加硫工程で切断面相互の接着力の低下を防止するため
金属シート、布、ゴムシート等の保護層６を配置するこ
ともできる。Figures 1 and 2 show the cross-sectional shape of a tire during preheating in the method of the present invention.A solid tire has a base part 2 that is fitted in contact with the rim, and a tread part 3 that is arranged on the side that contacts the road surface. The base part 2 is made of a rubber compound reinforced with short fibers to strengthen the fitting force with the rim, while the tread part is made of a rubber compound reinforced with short fibers to strengthen the fitting force with the rim, while the tread part has properties such as abrasion resistance and A rubber compound is used to improve chipping and damage resistance. The base part is made by wrapping a band of unvulcanized rubber sheet multiple times in the circumferential direction of the tire to form a base rubber 2 of a predetermined thickness, and on top of that, another band of unvulcanized rubber sheet of am is wrapped. The tread portion 3 is formed by winding the tire several times in the circumferential direction of the tire, and the tire low cover 4 is formed. Next, this low cover 4 is cut in the tire radial direction near the tire equator where the temperature rises the most, and a plurality of spacers 5 are inserted into the cut surface. The spacer 5 may be annular or arcuate, or may be a square or round rod or wedge, and its material may be metal, wood, plastic, or the like. By arranging this spacer 5 on the cut surface, the distance W between the cut surfaces on the tread surface must be at least 10 mm, and if it is smaller than this, heat conduction will not be effective. A protective layer 6 of metal sheet, cloth, rubber sheet, etc. may be provided to prevent the adhesive force between the cut surfaces from decreasing during the vulcanization process.
上記ローカバーは次に通常の熱風オーブン中で予熱され
るが、この予熱は７０゛〜１０００の温度下で約１〜４
時間行われる。The raw cover is then preheated in a conventional hot air oven at a temperature of 70° to 1000° C.
Time is done.
この予熱工程の後ローカバーは前記スペーサ５、及び保
護層６が取り除かれて加硫金型にセットされ、所定時間
所定温度加硫される。After this preheating step, the spacer 5 and protective layer 6 are removed from the raw cover, and the raw cover is set in a vulcanization mold and vulcanized at a predetermined temperature for a predetermined time.
次に第２図に別の実施例を示し、切断面はタイヤ赤道近
傍でタイヤ半径方向にベース部とトレッド部の接合面Ｓ
に達している。この場合トレッド部の切断によってロー
カバーの形がくずれることが少なくてすみ、加硫金型へ
のセットが一層円滑で行なえる。なお切断面はタイヤ巾
方向に複数個形成できることは勿論である。又完全に分
割した場合はスペーサーを用いずに分離して予熱するこ
ともできる。Next, another embodiment is shown in FIG.
has reached. In this case, the shape of the low cover is less likely to be deformed due to cutting of the tread portion, and the setting into the vulcanization mold can be performed more smoothly. It goes without saying that a plurality of cut surfaces can be formed in the width direction of the tire. In addition, if it is completely divided, it can be separated and preheated without using a spacer.
（実施例〕
タイヤサイズ７００−１２のニエーマチック型ソリッド
タイヤのローカバーを成形し、第１図に示す如く、タイ
ヤ赤道面近傍でタイヤ半径方向にトレッド部及び、ベー
ス部の全体を切断する切断面を形成し、トレッド部表面
側に最大厚さ３Ｃ１１のクラビ状の金属製スペーサを周
上に５個配置し熱風１００℃のオーブン中で４時間予熱
し、しかる後加硫金型中で温度１５０℃で２時間２０分
行った。同様に従来のタイヤ加硫方法で本発明と同等の
加硫量が得られる加硫時間を求めると３時間４０分であ
った。第３図に予熱時間と温度、第４図に加硫時間と温
度の関係をグラフに示す、なお温度はタイヤで最も温度
の低い部分の温度を示す。(Example) A low cover of a Niematic solid tire with a tire size of 700-12 was molded, and as shown in Fig. 1, a cut surface was cut through the entire tread and base portion in the tire radial direction near the tire equatorial plane. Five club-shaped metal spacers with a maximum thickness of 3C11 are placed around the tread surface side, preheated in a hot air oven at 100°C for 4 hours, and then heated in a vulcanization mold at a temperature of 150°C. Similarly, the curing time for obtaining the same amount of vulcanization as in the present invention using a conventional tire curing method was found to be 3 hours and 40 minutes. Figure 3 shows the preheating time and temperature. The relationship between vulcanization time and temperature is shown in a graph in FIG. 4, where the temperature indicates the temperature at the lowest temperature part of the tire.
上述の如く本発明はソリッドタイヤのローカバーを特定
の方向に切断しスペーサを配置して、予熱する方法を採
用したため、熱伝導が効果的に向上でき昇温が均一化し
金型内での加硫時間が短縮できる。As mentioned above, the present invention adopts a method of cutting the low cover of a solid tire in a specific direction, arranging spacers, and preheating it, which effectively improves heat conduction, makes temperature rise uniform, and facilitates vulcanization in the mold. It can save time.
第１図、第２図はソリッドタイヤのローカバーのタイヤ
断面形状を、第３図は予熱時間とタイヤの温度、第４図
は加砕時間とタイヤの温度及び加硫量の関係を示す。
２−ベース部、 ３・−トレッド部、４−ローカバー
、 ５−スペーサ。
特許出願人 住友ゴム工業株式会社代理人 弁理
士 苗 村 正第３図
予解、ａ奇問Figures 1 and 2 show the tire cross-sectional shape of a low cover of a solid tire, Figure 3 shows the relationship between preheating time and tire temperature, and Figure 4 shows the relationship between crushing time, tire temperature, and vulcanization amount. 2-base part, 3-tread part, 4-low cover, 5-spacer. Patent Applicant Sumitomo Rubber Industries Co., Ltd. Agent Patent Attorney Naemura Tadashi Diagram 3 Prediction, A Strange Question
Claims (3)
ッド部のローカバーのみをタイヤ半径方向に部分的又は
全体的に分割して成形し所定時間及び温度差で予熱し、
しかる後金型で加硫することを特徴とするソリッドタイ
ヤの加硫時間短縮方法。(1) The base part and tread part low cover, or only the tread part low cover, are partially or completely divided in the tire radial direction and molded and preheated for a predetermined time and temperature difference,
A method for shortening the vulcanization time of a solid tire, which is characterized by vulcanizing the solid tire in a mold after a certain period of time.
置されて予熱した後、分割面を合わせて加硫することを
特徴とする特許請求の範囲第１項記載の方法。(2) The method according to claim 1, characterized in that spacers are placed on the cut surfaces of the divided row cover, and after preheating, the divided surfaces are brought together and vulcanized.
されていることを特徴とする特許請求の範囲第１項記載
の方法。(3) The method according to claim 1, wherein the cut surfaces of the divided row cover are covered with a protective layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60192615A JPS6251407A (en) | 1985-08-31 | 1985-08-31 | Shortening time of vulcanizing solid tyre |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60192615A JPS6251407A (en) | 1985-08-31 | 1985-08-31 | Shortening time of vulcanizing solid tyre |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6251407A true JPS6251407A (en) | 1987-03-06 |
| JPH0422123B2 JPH0422123B2 (en) | 1992-04-15 |
Family
ID=16294204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60192615A Granted JPS6251407A (en) | 1985-08-31 | 1985-08-31 | Shortening time of vulcanizing solid tyre |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6251407A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011020273A (en) * | 2009-07-13 | 2011-02-03 | Sumitomo Rubber Ind Ltd | Tire vulcanizing method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW400288B (en) * | 1996-08-22 | 2000-08-01 | Fukunaga Engineering Co Ltd | Solid tire |
-
1985
- 1985-08-31 JP JP60192615A patent/JPS6251407A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011020273A (en) * | 2009-07-13 | 2011-02-03 | Sumitomo Rubber Ind Ltd | Tire vulcanizing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0422123B2 (en) | 1992-04-15 |
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