JP4055870B2

JP4055870B2 - Transmission belt vulcanization method

Info

Publication number: JP4055870B2
Application number: JP33954297A
Authority: JP
Inventors: 昌彦宝蔵寺
Original assignee: Bando Chemical Industries Ltd
Current assignee: Bando Chemical Industries Ltd
Priority date: 1997-12-10
Filing date: 1997-12-10
Publication date: 2008-03-05
Anticipated expiration: 2017-12-10
Also published as: JPH11170273A

Description

【０００１】
【発明の属する技術分野】
本発明は、円筒状金型に、最終的に伝動ベルトとなる円筒状の未加硫のベルト成形体を装着した状態で、加硫を行う伝動ベルトの加硫方法に関する。
【０００２】
【従来の技術】
従来、ゴム伝動ベルトを製造する場合には、所定の未加硫のゴムシート、コード等を円筒状金型に巻き付けて円筒状の未加硫のベルト成形体を成形し、その円筒状金型の内外部より加圧蒸気により加圧・加熱して加硫し、加硫後、加硫後のベルト成形体を輪切りにして、完成品としてのゴム伝動ベルトとすることが行われている。
【０００３】
ところで、このような加硫を行う方法として、ガスケット方式による加硫装置が知られている。かかる装置においては、上記円筒状の未加硫のベルト成形体が外周面に成形された円筒状金型をホイスト等の搬送手段で吊り上げて、円筒状のガスケットハウジング内に搬入し、該ガスケットハウジングの内周面のガスケットスリーブ（弾性スリーブ）内に外圧蒸気を導入して上記ガスケットスリーブを膨張させ、未加硫のベルト成形体を外側から加熱・加圧する。その一方、円筒状金型の上端開口から円筒状金型内に内圧蒸気を導入して下端開口から排出し、未加硫のベルト成形体を内側から加熱することにより加硫している。
【０００４】
【発明が解決しようとする課題】
しかしながら、このような加硫工程においては、加硫中に、円筒状金型の外周面に円筒状の未加硫のベルト成形体の内周面が接着し、加硫後に、ベルト成形体が円筒状金型より離れにくくなるという課題がある。
【０００５】
本発明はかかる点にかんがみてなされたもので、加硫後に、円筒状金型よりベルト成形体を簡単に取り外すことができる伝動ベルトの加硫方法を提供することを目的とする。
【０００６】
【課題を解決するための手段】
請求項１の発明は、円筒状金型に、最終的に伝動ベルトとなる円筒状の未加硫のベルト成形体を装着した状態で、加硫を行う伝動ベルトの加硫方法であって、前記円筒状金型は、上下に、前記加硫前後においてベルト成形体の上下端面を規制する上下規制部材が設けられているものであり、前記未加硫のベルト成形体の加硫後、冷却して収縮する前に、加硫後のベルト成形体と円筒状金型との間に流体を供給し、それらを分離させる工程を有することを特徴とする。
【０００７】
よって、円筒状の未加硫のベルト成形体の加硫後であって、冷却して収縮する前に、前記加硫後のベルト成形体と円筒状金型との間に流体が供給され、その流体によって、加硫後のベルト成形体と円筒状金型とが分離せしめられる。よって、円筒状金型の外周面と加硫後のベルト成形体の内周面との接着が解消され、加硫後の型抜き、即ち円筒状金型より加硫後のベルト成形体を取り外すことが簡単に行われる。
また、上下規制部材による規制によって、加硫前後においてベルト成形体と円筒状金型との間の上下部分がシールされることとなり、それによって加硫後のベルト成形体と円筒状金型との間に供給される流体が外部に漏れるのが抑制され、両者の分離がより確実になされるようになる。
【０００８】
請求項２の発明は、請求項１の伝動ベルトの加硫方法において、前記円筒状金型に、中央部側に向けて傾斜した流体供給孔が形成され、前記円筒状金型の内部から、前記流体供給孔を通じて、前記未加硫のベルト成形体と円筒状金型との間に流体が供給されるものである。
【０００９】
よって、円筒状の未加硫のベルト成形体の加硫後、冷却して収縮する前に、円筒状金型に形成された流体供給孔を通じて、円筒状金型の内部から加硫後のベルト成形体と円筒状金型との間に流体が供給され、その流体によって加硫後のベルト成形体と円筒状金型とが分離せしめられる。
【００１２】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて説明する。
【００１３】
ガスケット方式の加硫装置の上部及び下部をそれぞれ示す図１（ａ）（ｂ）において、１はガスケット方式の加硫装置で、上側部分に流体導入口２ａを、下側部分に流体排出口２ｂをそれぞれ有する円筒形状の外筒２（ガスケットハウジング）と、その外筒２の内側に設けられ、上下端部が外筒２に取り付けられて該外筒２との間に密閉空間３を形成する弾性スリーブ４（ガスケットスリーブ）とを備え、これらがベース台９上に載置されている。
【００１４】
そして、前記弾性スリーブ４の内側に、最終的にはゴム伝動ベルトとなる円筒状の未加硫のベルト成形体５が外周面上に装着されている円筒状金型６が挿入されて加硫が行われるが、該円筒状金型６の上部及び下部には、未加硫あるいは加硫後のベルト成形体５の上端部及び下端部を規制するために、上側及び下側規制部材７，８がそれぞれ設けられている。
【００１５】
また、前記ベース台９の、外筒２の外側には、第１及び第２の連結具１１，１２が配設され、第１の連結具１１が流体導入口２ａに流体導入口１３を通じて連係され、第２の連結具１２が流体排出口１４に直接に接続されている。それによって、外筒２と弾性スリーブ４との間に形成される密閉空間３内に流体導入口２ａを通じて加圧蒸気が導入され、流体排出口１４を通じて加圧蒸気が排出される際、円筒状の未加硫のベルト成形体５が外側から弾性スリーブ４を介して加熱加圧される。
【００１６】
上記円筒状金型６の上下部には、図２に示すように、加硫のための加熱蒸気を円筒状金型６の内部に導入・排出するするための上側及び下側開口部６ａ，６ｂが上方及び下方に突出するように形成されている。そして、図示しない蒸気供給手段から、上側開口部６ａを通じて円筒状金型６内に蒸気が導入され、下側開口部６ｂを通じて外部に排出されることで、未加硫のベルト成形体５が内側から加熱される。
【００１７】
また、上記円筒状金型６の上下端部付近には、円筒状金型６の内部から中央部付近に向けて流体を吹き出すように傾斜している複数の流体供給孔６ｃ，・・，６ｄ，・・が形成されている。そして、加硫後、ベルト成形体５が冷却して収縮する前に、円筒状金型６の内部に空気が供給され、該空気が、流体供給孔６ｃ，・・，６ｄ，・・を通じて、円筒状金型６の外周面と加硫後のベルト成形体５の内周面との間に供給され、このように供給される空気が円筒状金型６の外周面と加硫後のベルト成形体５の内周面との接着を解消するように機能する。
【００１８】
尚、本例においては、流体供給孔６ｃ，・・，６ｄ，・・は、それぞれ金型軸線方向に対し略６０゜なる角度で傾斜して設けられ、等角度間隔で円周方向に８つが配設されている。
【００１９】
上記上側規制部材７は、図１（ａ）に示すように、下端に未加硫あるいは加硫後のベルト成形体５の上端縁部を規制する薄肉部７ａと、該薄肉部７ａの上部に連設された筒状部７ｂと、該筒状部７ｂの上側に取り付けられた環状の円盤部７ｃとを有する。なお、上記上側規制部材７は、加硫装置１での加硫後、加硫後のベルト成形体５及び円筒状金型６と共に、外筒２内より取り出される。
【００２０】
また、上記下側規制部材８は、図１（ｂ）に示すように、上端に未加硫あるいは加硫後のベルト成形体５の上端縁部を規制する薄肉部８ａを有する筒状部８ｂと、該筒状部８ｂの下側に取り付けられた環状の円盤部８ｃとを備え、位置決め部材１０を介して、ベース台９上の所定の位置に移動不能に載置されている。
【００２１】
上記のように構成すれば、加硫時には、まず、図示しない蒸気供給手段の供給ノズル及び排出ノズルがそれぞれ上側開口部６ａ及び下側開口部６ｂに着脱可能に接続される。それから、上側開口部６ａを通じて円筒状金型６の内部に蒸気が導入され、下側開口部６ｂを通じて外部に排出され、それによって未加硫のベルト成形体５が内側から加熱される。一方、流体導入口２ａを通じて外筒２と弾性スリーブ４との間の密閉空間３内に加圧蒸気が導入され、流体排出口２ｂを通じて外部に排出され、それによって未加硫のベルト成形体５が外側から加熱加圧され、未加硫のベルト成形体５の加硫が行われる。
【００２２】
このとき、上側及び下側規制部材７，８によって、未加硫のベルト成形体５の上側及び下側端面が、上下方向に移動しないように規制され、未加硫のベルト成形体５が所定形状に加硫される。
【００２３】
また、加硫後、ベルト成形体５が冷却して収縮する前に、円筒状金型６内に空気（流体）が供給され、流体供給孔６ｃ，・・，６ｄ，・・を通じて、円筒状金型６の外周面と加硫後のベルト成形体５の内周面との間に漏れ出る。このとき、流体供給孔６ｃ，・・，６ｄ，・・が中央部に向けて傾斜していることから、上記空気が上下端部側から中央部側に向かって供給され、加硫後のベルト成形体５と円筒状金型６との間において上記空気が上下方向全体にわたって行き渡り、その空気によって加硫後のベルト成形体５の内周面と円筒状金型６の外周面との接着が解消され、容易に分離可能な状態とされる。なお、前記円筒状金型６の上下部には、ベルト成形体５の上下端面を規制する上下規制部材７，８が設けられているので、両規制部材７，８によって前記加硫後のベルト成形体５と円筒状金型６との間の上下部分がシールされ、それらの間に供給される流体の外部への漏れが抑制され、加硫後の両者の分離がより確実となるようにされている。
【００２４】
よって、加硫工程終了後、加硫後のベルト成形体５と円筒状金型６との接着の問題を生ずることなく、加硫後のベルト成形体５を円筒状金型６から直ちに分離することができる。
【００２５】
【発明の効果】
請求項１の発明は、上記のように、加硫後、ベルト成形体が冷却して収縮する前に、加硫後のベルト成形体と円筒状金型との間に流体を供給し、その流体によって加硫後のベルト成形体と円筒状金型とを分離させるようにしているので、加硫後のベルト成形体の円筒状金型への接着を解消することが可能となり、加硫後の型抜き、即ち円筒状金型より加硫後のベルト成形体を取り外すことを簡単に行うことができる。
また、円筒状金型は、上下に、加硫前後においてベルト成形体の上下端面を規制する上下規制部材を設けたものであるので、上下規制部材によって、加硫後のベルト成形体と円筒状金型との間の上下部分をシールして、その間に供給される流体を外部に漏れにくくすることができ、加硫後の両者の分離をより確実にすることが可能となる。
【００２６】
請求項２の発明は、円筒状金型に形成された流体供給孔を通じて、円筒状金型の内部から加硫後のベルト成形体と円筒状金型との間に流体を供給するようにしているので、円筒状金型に流体供給孔を形成するという簡単な構造で、加硫後のベルト成形体と円筒状金型との間に流体を供給することできる。
【図面の簡単な説明】
【図１】本発明に係る加硫装置を示し、（ａ）は同装置の上部を示す断面図、（ｂ）は同装置の下部を示す断面図である。
【図２】本発明に係る円筒状金型の説明図である。
【符号の説明】
１加硫装置
２外筒
３密閉空間
４弾性スリーブ
５ベルト成形体
６円筒状金型
６ａ上側開口部
６ｂ下側開口部
６ｃ流体供給孔
６ｄ流体供給孔
７上側規制部材
８下側規制部材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vulcanization method for a transmission belt in which vulcanization is performed in a state where a cylindrical unvulcanized belt molded body that finally becomes a transmission belt is mounted on a cylindrical mold.
[0002]
[Prior art]
Conventionally, when manufacturing a rubber transmission belt, a predetermined unvulcanized rubber sheet, cord, etc. are wound around a cylindrical mold to form a cylindrical unvulcanized belt molded body, and the cylindrical mold A vulcanization is performed by pressurizing and heating with pressurized steam from the inside and outside, and after vulcanization, the vulcanized belt molded body is cut into round pieces to obtain a rubber transmission belt as a finished product.
[0003]
By the way, as a method of performing such vulcanization, a vulcanizing apparatus using a gasket method is known. In such an apparatus, the cylindrical mold formed on the outer peripheral surface of the cylindrical unvulcanized belt molded body is lifted by a conveying means such as a hoist, and is carried into a cylindrical gasket housing. External pressure steam is introduced into a gasket sleeve (elastic sleeve) on the inner peripheral surface of the inner sleeve to expand the gasket sleeve, and the unvulcanized belt molded body is heated and pressurized from the outside. On the other hand, internal pressure steam is introduced into the cylindrical mold from the upper end opening of the cylindrical mold, discharged from the lower end opening, and vulcanized by heating the unvulcanized belt molded body from the inside.
[0004]
[Problems to be solved by the invention]
However, in such a vulcanization process, during vulcanization, the inner peripheral surface of the cylindrical unvulcanized belt molded body is bonded to the outer circumferential surface of the cylindrical mold, and after vulcanization, the belt molded body is There is a problem that it is difficult to separate from the cylindrical mold.
[0005]
The present invention has been made in view of this point, and an object of the present invention is to provide a transmission belt vulcanization method in which a belt molded body can be easily removed from a cylindrical mold after vulcanization.
[0006]
[Means for Solving the Problems]
The invention of claim 1 is a vulcanization method of a transmission belt that performs vulcanization in a state where a cylindrical unvulcanized belt molded body that will eventually become a transmission belt is mounted on a cylindrical mold, The cylindrical mold is provided with upper and lower regulating members for regulating upper and lower end surfaces of the belt molded body before and after the vulcanization, and is cooled after vulcanization of the unvulcanized belt molded body. before to shrink, pressurized supply fluid between the belt shaped body and the cylindrical mold after curing, characterized by having a step of separating them.
[0007]
Therefore, after vulcanization of the cylindrical unvulcanized belt molded body and before cooling and shrinking, fluid is supplied between the vulcanized belt molded body and the cylindrical mold, By the fluid, the belt molded body after vulcanization and the cylindrical mold are separated. Therefore, the adhesion between the outer peripheral surface of the cylindrical mold and the inner peripheral surface of the belt molded body after vulcanization is eliminated, and the vulcanized belt molded body is removed from the mold after vulcanization, that is, from the cylindrical mold. It is easy to do.
In addition, the upper and lower portions between the belt molded body and the cylindrical mold are sealed before and after vulcanization by the regulation by the upper and lower regulating member, and thereby the vulcanized belt molded body and the cylindrical mold are sealed. The fluid supplied between them is prevented from leaking to the outside, and the two are more reliably separated.
[0008]
According to a second aspect of the present invention, in the method for vulcanizing a transmission belt according to the first aspect, a fluid supply hole inclined toward the center side is formed in the cylindrical mold, and from the inside of the cylindrical mold, A fluid is supplied between the unvulcanized belt molded body and the cylindrical mold through the fluid supply hole.
[0009]
Therefore, after vulcanization of the cylindrical unvulcanized belt molded body, the belt after vulcanization from the inside of the cylindrical mold through the fluid supply hole formed in the cylindrical mold before cooling and shrinking. A fluid is supplied between the molded body and the cylindrical mold, and the vulcanized belt molded body and the cylindrical mold are separated by the fluid.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
1 (a) and 1 (b) showing the upper and lower portions of a gasket type vulcanizing device, 1 is a gasket type vulcanizing device, wherein a fluid inlet 2a is provided in the upper part and a fluid outlet 2b is provided in the lower part. And a cylindrical outer cylinder 2 (gasket housing) each having a cylindrical shape, and an upper and lower end portion of the cylindrical outer cylinder 2 attached to the outer cylinder 2 to form a sealed space 3 therebetween. An elastic sleeve 4 (gasket sleeve) is provided, and these are mounted on the base 9.
[0014]
Then, a cylindrical mold 6 having a cylindrical unvulcanized belt molded body 5 which is finally a rubber transmission belt mounted on the outer peripheral surface is inserted inside the elastic sleeve 4 and vulcanized. However, in order to restrict the upper end and lower end of the unvulcanized or vulcanized belt molded body 5, the upper and lower regulating members 7, 8 are provided.
[0015]
In addition, first and second connectors 11 and 12 are disposed outside the outer cylinder 2 of the base 9, and the first connector 11 is linked to the fluid inlet 2 a through the fluid inlet 13. The second connector 12 is directly connected to the fluid discharge port 14. Accordingly, when the pressurized steam is introduced through the fluid introduction port 2a into the sealed space 3 formed between the outer cylinder 2 and the elastic sleeve 4, and the pressurized steam is discharged through the fluid discharge port 14, the cylindrical shape The unvulcanized belt molded body 5 is heated and pressurized through the elastic sleeve 4 from the outside.
[0016]
As shown in FIG. 2, upper and lower openings 6a for introducing and discharging heating steam for vulcanization into and out of the cylindrical mold 6 are provided at the upper and lower portions of the cylindrical mold 6, respectively. 6b is formed so as to protrude upward and downward. Then, steam is introduced from the steam supply means (not shown) into the cylindrical mold 6 through the upper opening 6a and discharged to the outside through the lower opening 6b, so that the unvulcanized belt molded body 5 is inside. Is heated from.
[0017]
A plurality of fluid supply holes 6c,..., 6d inclined near the upper and lower end portions of the cylindrical mold 6 so as to blow out fluid from the inside of the cylindrical mold 6 toward the vicinity of the central portion. , ... are formed. Then, after vulcanization, before the belt molded body 5 cools and contracts, air is supplied to the inside of the cylindrical mold 6, and the air passes through the fluid supply holes 6 c,. The air is supplied between the outer peripheral surface of the cylindrical mold 6 and the inner peripheral surface of the vulcanized belt molded body 5, and the air supplied in this way is the outer peripheral surface of the cylindrical mold 6 and the vulcanized belt. It functions to eliminate the adhesion with the inner peripheral surface of the molded body 5.
[0018]
In this example, the fluid supply holes 6c,..., 6d,... Are inclined at an angle of about 60 ° with respect to the mold axis direction, and eight fluid supply holes are provided at equal angular intervals in the circumferential direction. It is arranged.
[0019]
As shown in FIG. 1 (a), the upper regulating member 7 includes a thin portion 7a for regulating the upper end edge of the unmolded or vulcanized belt molded body 5 at the lower end, and an upper portion of the thin portion 7a. It has the cylindrical part 7b provided in series, and the cyclic | annular disk part 7c attached to the upper side of this cylindrical part 7b. The upper regulating member 7 is taken out from the outer cylinder 2 together with the belt molded body 5 and the cylindrical mold 6 after the vulcanization by the vulcanizer 1.
[0020]
Further, as shown in FIG. 1B, the lower regulating member 8 has a cylindrical portion 8b having a thin portion 8a for regulating the upper end edge of the unvulcanized or vulcanized belt molded body 5 at the upper end. And an annular disk portion 8c attached to the lower side of the cylindrical portion 8b, and is placed on a predetermined position on the base table 9 through the positioning member 10 so as to be immovable.
[0021]
If comprised as mentioned above, at the time of vulcanization | cure, first, the supply nozzle and discharge nozzle of the vapor | steam supply means which are not shown in figure are detachably connected to the upper side opening part 6a and the lower side opening part 6b, respectively. Then, steam is introduced into the cylindrical mold 6 through the upper opening 6a and discharged to the outside through the lower opening 6b, whereby the unvulcanized belt molded body 5 is heated from the inside. On the other hand, pressurized steam is introduced into the sealed space 3 between the outer cylinder 2 and the elastic sleeve 4 through the fluid introduction port 2a and discharged to the outside through the fluid discharge port 2b, whereby an unvulcanized belt molded body 5 is obtained. Is heated and pressurized from the outside, and the unvulcanized belt molded body 5 is vulcanized.
[0022]
At this time, the upper and lower regulating members 7 and 8 regulate the upper and lower end surfaces of the unvulcanized belt molded body 5 so as not to move in the vertical direction, and the unvulcanized belt molded body 5 is predetermined. Vulcanized in shape.
[0023]
Also, after vulcanization, before the belt molded body 5 cools and contracts, air (fluid) is supplied into the cylindrical mold 6 and is cylindrical through the fluid supply holes 6c,..., 6d,. Leakage occurs between the outer peripheral surface of the mold 6 and the inner peripheral surface of the belt molded body 5 after vulcanization. At this time, since the fluid supply holes 6c, ..., 6d, ... are inclined toward the center, the air is supplied from the upper and lower ends toward the center, and the belt after vulcanization The air spreads across the entire vertical direction between the molded body 5 and the cylindrical mold 6, and the air causes adhesion between the inner peripheral surface of the belt molded body 5 after vulcanization and the outer peripheral surface of the cylindrical mold 6. It is eliminated, and it can be easily separated. The upper and lower portions of the cylindrical mold 6 are provided with upper and lower restricting members 7 and 8 for restricting the upper and lower end surfaces of the belt molded body 5. The upper and lower parts between the molded body 5 and the cylindrical mold 6 are sealed, the leakage of the fluid supplied between them is suppressed to the outside, and the separation between the two after vulcanization is made more reliable. Has been.
[0024]
Therefore, after completion of the vulcanization process, the vulcanized belt molded body 5 is immediately separated from the cylindrical mold 6 without causing a problem of adhesion between the vulcanized belt molded body 5 and the cylindrical mold 6. be able to.
[0025]
【The invention's effect】
According to the first aspect of the present invention, as described above, before vulcanization and before the belt molded body cools and contracts, fluid is supplied between the vulcanized belt molded body and the cylindrical mold, Since the vulcanized belt molded body and the cylindrical mold are separated by the fluid, it becomes possible to eliminate the adhesion of the vulcanized belt molded body to the cylindrical mold, and after vulcanization Therefore, it is possible to simply remove the vulcanized belt molded body from the cylindrical mold.
Further, the cylindrical mold is provided with upper and lower regulating members that regulate the upper and lower end surfaces of the belt molded body before and after vulcanization, so that the vulcanized belt molded body and the cylindrical shape are formed by the upper and lower regulating members. The upper and lower portions between the molds can be sealed to make it difficult for the fluid supplied therebetween to leak to the outside, and the separation of both after vulcanization can be made more reliable.
[0026]
According to a second aspect of the present invention, fluid is supplied between the vulcanized belt molded body and the cylindrical mold from the inside of the cylindrical mold through the fluid supply hole formed in the cylindrical mold. Therefore, the fluid can be supplied between the vulcanized belt molded body and the cylindrical mold with a simple structure in which the fluid supply hole is formed in the cylindrical mold.
[Brief description of the drawings]
FIG. 1 shows a vulcanizing apparatus according to the present invention, wherein (a) is a cross-sectional view showing an upper part of the apparatus, and (b) is a cross-sectional view showing a lower part of the apparatus.
FIG. 2 is an explanatory view of a cylindrical mold according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vulcanizer 2 Outer cylinder 3 Sealed space 4 Elastic sleeve 5 Belt molded object 6 Cylindrical metal mold 6a Upper opening 6b Lower opening 6c Fluid supply hole 6d Fluid supply hole 7 Upper regulating member 8 Lower regulating member

Claims

A transmission belt vulcanizing method for performing vulcanization in a state where a cylindrical unvulcanized belt molded body that will eventually become a transmission belt is mounted on a cylindrical mold,
The cylindrical mold is provided with upper and lower regulating members that regulate upper and lower end surfaces of the belt molded body before and after the vulcanization,
After vulcanization of the unvulcanized belt molded body, before cooling and shrinking, it has a step of supplying a fluid between the vulcanized belt molded body and the cylindrical mold and separating them. A vulcanization method for a transmission belt characterized by

A fluid supply hole inclined toward the center side is formed in the cylindrical mold, and the vulcanized belt molded body and the cylindrical mold are passed through the fluid supply hole from the inside of the cylindrical mold. The transmission belt vulcanizing method according to claim 1, wherein a fluid is supplied between the two.