JPH03211042A - Manufacture and manufacturing device for round belt - Google Patents

Manufacture and manufacturing device for round belt

Info

Publication number
JPH03211042A
JPH03211042A JP757090A JP757090A JPH03211042A JP H03211042 A JPH03211042 A JP H03211042A JP 757090 A JP757090 A JP 757090A JP 757090 A JP757090 A JP 757090A JP H03211042 A JPH03211042 A JP H03211042A
Authority
JP
Japan
Prior art keywords
mold
belt
cavity
liquid rubber
belt material
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
Application number
JP757090A
Other languages
Japanese (ja)
Other versions
JPH06104341B2 (en
Inventor
Yoshihiro Takao
高雄 嘉宏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bando Chemical Industries Ltd
Original Assignee
Bando Chemical Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bando Chemical Industries Ltd filed Critical Bando Chemical Industries Ltd
Priority to JP2007570A priority Critical patent/JPH06104341B2/en
Publication of JPH03211042A publication Critical patent/JPH03211042A/en
Publication of JPH06104341B2 publication Critical patent/JPH06104341B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

PURPOSE:To improve freedom in selection of a material and manufacturing condition and manufacture an annular round belt whose strength is improved, by a method wherein after a belt material is filled into a cavity with centrifugal force by a die, the belt material is cured under a state where a rotation of a die is kept on and the belt material is molded swiftly into a fixed form. CONSTITUTION:Dies 5, 6, 7 each are turned unitarily following to a rotation of a shaft 3a. Then a die 4 is heated, for example, at 100 deg.C under this turned state and liquid rubber is loaded within the die 4. For example, liquid polyether polyurethane is adopted as the liquid rubber. Since the cast liquid rubber receives centrifugal rubber with turning, the same is filled sway swiftly into cavities S1-S8 and flash grooves F1-F8. After the cavities S1-S8 are filled with the liquid rubber after the lapse of a fixed time after loading of the liquid rubber, the liquid rubber is deaerated under a state where this turning is kept on and cured in a fixed time in succession. With this curing, the liquid rubber is formed into a fixed form corresponding to the cavities S1-S8 and flash grooves F1-F8.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、丸ベルト等の製造方法及び製造装置に係り、
特に、加工性及びベルト強度の向上を図るための対策に
関する。
Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a method and apparatus for manufacturing round belts, etc.
In particular, it relates to measures for improving workability and belt strength.

(従来の技術) これまで、家庭用電気機器などに多用される軽負荷伝達
用のリング状丸ベルトは一般に知られている。このリン
グ状丸ベルトは、ポリエーテル系ウレタンゴム等を素材
とし、円形断面で且つ円環状に形成されたものである。
(Prior Art) Ring-shaped round belts for transmitting light loads, which are often used in household electric appliances, have been generally known. This ring-shaped round belt is made of polyether urethane rubber or the like and has a circular cross section and an annular shape.

そして、このリング状丸ベルトの製造方法としては、従
来、加熱した熱可塑性ウレタンゴムを成形型内に押し込
んで所定形状に成形するようにした射出成形によるもの
が一般的であった。また、その他の製造方法として、液
状熱硬化性ウレタンゴムを成形型内に充填、加熱するキ
ャストプレス法や、ゴム素材を加工することによって所
定の形状に成形する素材加工法などがある。
Conventionally, this ring-shaped round belt has been manufactured by injection molding, in which heated thermoplastic urethane rubber is forced into a mold and molded into a predetermined shape. Other manufacturing methods include a cast press method in which liquid thermosetting urethane rubber is filled into a mold and heated, and a material processing method in which a rubber material is processed to form a predetermined shape.

(発明が解決しようとする課題) しかしながら、上述したようなこれまでの製造方法にあ
っては、以下のような問題点がある。つまり、射出成形
法及びキャストプレス法にあっては材料の選択に制約を
受ける。つまり、製品としての丸ベルトに低硬度、低い
永久伸び、耐摩耗性、耐熱性が要求される場合、適用可
能な材料が制約されることになる。また、流動性を有し
ているゴム材料が硬化するまでの時間であるポットライ
フや、このゴム材料の流動状態における粘度にも制約を
受け、ゴム材料その他、加工条件の設定か煩雑であった
。また、このような製造方法によって製造されたベルト
は、その運転中に、ベルト材料の融合が不十分なウェル
ドライン部分や、ベルト表面が後加工されるゲート部分
において切断するおそれがあった。また、前記液状熱硬
化性ウレタンゴムのキャストプレス法や素材加工法にあ
っては、加工性が劣っている。
(Problems to be Solved by the Invention) However, the conventional manufacturing methods as described above have the following problems. In other words, the injection molding method and the cast press method are subject to restrictions on the selection of materials. In other words, when a round belt as a product is required to have low hardness, low permanent elongation, wear resistance, and heat resistance, applicable materials are restricted. Additionally, there were restrictions on the pot life, which is the time it takes for a fluid rubber material to harden, and the viscosity of the rubber material in its fluid state, making it complicated to set processing conditions for the rubber material and other components. . Further, during operation of the belt manufactured by such a manufacturing method, there is a risk that the belt may be cut at a weld line portion where the belt material is insufficiently fused or at a gate portion where the belt surface is subjected to post-processing. Furthermore, the processability of the liquid thermosetting urethane rubber is poor in the casting press method and the material processing method.

本発明は、これらの課題に鑑みてなされたもので、材料
選択及び加工条件の自由度を向上させ、且つ、強度が向
上されたリング状丸ベルトを製造する製造方法を得るこ
とを目的とする。
The present invention has been made in view of these problems, and aims to provide a manufacturing method for manufacturing a ring-shaped round belt with improved flexibility in material selection and processing conditions, and improved strength. .

(課題を解決するための手段) 上記の目的を達成するために本発明では、ベルト材料と
して液状ゴムを用い、この液状ゴムを遠心力で金型キャ
ビティ内に圧入して成形させるようにした。そして、具
体的に、請求項(1)の発明はゴム製の丸ベルト等の製
造方法で、円周方向に延びる断面円形状のキャビティを
有し、且つ内周面の分割部に上記キャビティに連通ずる
ベルト材料注入用の開口が全周に亘って形成されたリン
グ状の金型を用意する。そして、流動性を有する硬化性
のベルト材料を、金型のリング中心回りの回転によって
発生する遠心力により前記開口からキャビティに流し込
んで充填させ、この金型の回転を維持した状態で硬化さ
せるようにした。
(Means for Solving the Problems) In order to achieve the above object, in the present invention, liquid rubber is used as a belt material, and this liquid rubber is press-fitted into a mold cavity by centrifugal force and molded. Specifically, the invention of claim (1) is a method for manufacturing a rubber round belt, etc., which has a cavity with a circular cross section extending in the circumferential direction, and in which the cavity is formed in a divided portion of the inner circumferential surface. A ring-shaped mold having a continuous opening for injecting the belt material is prepared around the entire circumference. Then, a fluid curable belt material is poured into the cavity through the opening by centrifugal force generated by the rotation of the mold around the center of the ring, and is then cured while the mold continues to rotate. I made it.

また、請求項(2)の発明では、請求項(1)の発明に
係る方法を行うための製造装置であって、複数のリング
状金型部材が重ね合わされて成り、重合される金型部材
間に円周方向に延びる断面円形状のキャビティが形成さ
れ、金型部材の内周面の重合部に上記キャビティに連通
ずるベルト材料注入用の開口が全周に亘って形成された
金型と、流動性を有する硬化性のベルト材料が、遠心力
によって前記開口からキャビティに流れ込むように、前
記金型を、そのリング中心回りに回転駆動させる駆動手
段とを備えるようにした。
Further, the invention of claim (2) provides a manufacturing apparatus for carrying out the method according to the invention of claim (1), which is a mold member that is formed by overlapping a plurality of ring-shaped mold members and is polymerized. A mold having a circular cross-sectional cavity extending in the circumferential direction is formed in between, and an opening for injecting the belt material that communicates with the cavity is formed around the entire circumference at the overlapping part of the inner peripheral surface of the mold member. and a driving means for driving the mold to rotate around the center of the ring so that a fluid curable belt material flows into the cavity from the opening by centrifugal force.

(作用) 請求項(1)の発明に係る製造方法によれば、金型の回
転による遠心力によって前記ベルト材料をキャビティに
流し込んだ後、金型の回転を維持した状態でベルト材料
を硬化させるために、ベルト材料を速やかに所定形状に
成形することで、ベルト全周を均一に成形することがで
きばつ、ウェルドライン部分やゲート部分が存在し′j
いことでベルト強度が向上する。また、流動性ヲ(イす
るベルト材料を用いているために、その粘性及びポット
ライフの自由度の向上が図れる。
(Function) According to the manufacturing method according to the invention of claim (1), after the belt material is poured into the cavity by the centrifugal force caused by the rotation of the mold, the belt material is cured while the rotation of the mold is maintained. Therefore, by quickly forming the belt material into a predetermined shape, it is possible to uniformly form the entire circumference of the belt, but there are no weld lines or gate areas.
This improves belt strength. Furthermore, since a belt material with good fluidity is used, flexibility in viscosity and pot life can be improved.

請求項(2)の発明に係る製造装置によれば、金型部材
を重ね合わせるのみでキャビティ及びベルト注入用の開
口が形成されるため、丸ベルトの製造作業が簡略される
According to the manufacturing apparatus according to the invention of claim (2), the cavity and the belt injection opening are formed simply by overlapping the mold members, so that the manufacturing operation of the round belt is simplified.

(実施例) 次に、本発明の一実施例を図面に沿って説明する。(Example) Next, one embodiment of the present invention will be described with reference to the drawings.

先ず、ベルト製造装置について説明する。First, the belt manufacturing apparatus will be explained.

第3図に示すように、ベルト製造装置1は基台2を有す
る。この基台2は正面視が略5角形状の枠体であって、
その上面は略45°に傾斜した金型支持面2aとなって
いる。この金型支持面2aには、支持面2aに沿って傾
斜するシャフト3aがシャフト支持部材2b、2cを介
して回転自在に取付けられている。このシャフト3aは
、その下側のシャフト支持部材2Cよりも僅か上方に、
プーリ3bが回転一体に固定されている。一方、前記基
台2の金型支持面2aの下方には、上記シャフト3aと
平行な軸心の駆動軸3Cを有するモタ3dが配設され、
このモータ3dの駆動軸3Cにはプーリ3eが取付けら
れ、このプーリ3eと上記シャフト3aのプーリ3bと
の間にVベルト3fが掛は渡されており、モータ3dの
駆動力がVベルト3fを介してシャフト3aに伝達され
るようになっている。
As shown in FIG. 3, the belt manufacturing apparatus 1 has a base 2. As shown in FIG. This base 2 is a frame having a substantially pentagonal shape when viewed from the front,
Its upper surface forms a mold support surface 2a inclined at approximately 45 degrees. A shaft 3a inclined along the support surface 2a is rotatably attached to the mold support surface 2a via shaft support members 2b and 2c. This shaft 3a is slightly above the lower shaft support member 2C,
A pulley 3b is fixed to rotate integrally. On the other hand, a motor 3d having a drive shaft 3C whose axis is parallel to the shaft 3a is disposed below the mold support surface 2a of the base 2,
A pulley 3e is attached to the drive shaft 3C of the motor 3d, and a V-belt 3f is passed between the pulley 3e and the pulley 3b of the shaft 3a, and the driving force of the motor 3d is applied to the V-belt 3f. It is configured to be transmitted to the shaft 3a via.

更に、このシャフト3aは、第1図に示すように、その
上端部分が先細りのテーパ状となっていると共に、先端
面3gの中心にはネジ孔3hが形成されている。
Furthermore, as shown in FIG. 1, this shaft 3a has a tapered upper end portion, and a screw hole 3h is formed in the center of the tip end surface 3g.

このシャフト3aの先端には金型4が回転一体に取付け
られている。この金型4は、第1図及び第2図に示すよ
うに、下型5、複数(本例では7つ)の中型6,6.・
・・、上型7及び複数の締結部材8とて成っている。
A mold 4 is rotatably attached to the tip of the shaft 3a. As shown in FIGS. 1 and 2, this mold 4 includes a lower mold 5, a plurality (seven in this example) of middle molds 6, 6.・
..., an upper die 7 and a plurality of fastening members 8.

下型5は円盤状の部材であって、その中央部には前記シ
ャフト3aの先端テーパ部分が挿入されるテーパ状取付
は孔5aを有するボス部5bが形成されている。また、
この下型5の外周縁近傍の上面には周回溝5Cが凹設さ
れている。この周回溝5Cは、縦断面が所定半径r(本
例では2.5mm)をもった略半円状でなり、且つその
半円状断面の中心における周長さが例えば980mmに
設定されている。また、この周回溝5Cより外側に位置
する外側面5dは周回溝5Cより内側に位置する内側面
5eよりも所定寸法S(本例では0.1mm程度)だけ
上方に位置し、この外側面5dと周回溝5Cとの稜線部
分には内側面5eと同じ高さの段部5fが凹設されてい
る。また、外側面5dの更に外縁は下方へ向かう段部5
gに連続し、該段部5gの外側の外周縁部5hには複数
のネジ孔5i、5i、・・・が円周方向に等間隔をあけ
て貫通形成されている。
The lower die 5 is a disk-shaped member, and a boss portion 5b having a tapered mounting hole 5a into which the tapered end portion of the shaft 3a is inserted is formed in the center thereof. Also,
A circumferential groove 5C is formed in the upper surface of the lower mold 5 near the outer peripheral edge thereof. The circumferential groove 5C has a substantially semicircular vertical cross section with a predetermined radius r (2.5 mm in this example), and the circumferential length at the center of the semicircular cross section is set to, for example, 980 mm. . Further, the outer surface 5d located on the outside of the circumferential groove 5C is located above the inner surface 5e located on the inner side of the circumferential groove 5C by a predetermined dimension S (approximately 0.1 mm in this example), and this outer surface 5d A step portion 5f having the same height as the inner surface 5e is recessed in the ridgeline portion of the circumferential groove 5C. Further, the outer edge of the outer surface 5d has a step portion 5 facing downward.
A plurality of screw holes 5i, 5i, . . . are formed through the outer peripheral edge 5h of the stepped portion 5g at equal intervals in the circumferential direction.

中型6は各々同じ構成のリング状の部材であって、その
外径は、前記下型5の段部5gの径よりも大径で且つ前
記ネジ孔51の形成位置の径よりも小径に設定されてい
る。そして、この各中型6の上下面において前記下型5
の周回溝5Cに対応した位置には同様の周回溝6a、6
bが凹設されている。そして、上記下型5と同様に中型
6上面側に形成されている周回溝6aより外側に位置す
る外側面6Cは、周回溝6aより内側に位置する内側面
6dよりも前記所定寸法Sだけ上方に位置し、この外側
面6Cと周回溝6aとの稜線部分には内側面6dと同じ
高さの段部6eが凹設されている。一方、下面側に形成
されている周回溝6bより外側に位置する外側面6fは
、周回溝6bより内側に位置する内側面6gよりも所定
寸法Sだけ下方に位置し、この外側面6fと周回溝6b
との稜線部分には内側面6gと同じ高さの段部6hが凹
設されている。また、前記上側の外側面6Cの外側は前
記下型5の段部5gの形状に合致して下方へ向かう段部
61に、一方、前記下側の外側面6fの更に外側は前記
下型5の段部5gの形状に合致して下方へ向かう段部6
jに夫々連続している。尚、この中型6は一工程で製造
される丸ベルトの本数に応じて複数個用意される。
Each of the middle molds 6 is a ring-shaped member having the same configuration, and its outer diameter is set to be larger than the diameter of the stepped portion 5g of the lower mold 5 and smaller than the diameter of the position where the screw hole 51 is formed. has been done. Then, on the upper and lower surfaces of each medium mold 6, the lower mold 5
Similar circumferential grooves 6a, 6 are provided at positions corresponding to circumferential grooves 5C.
b is recessed. Similarly to the lower mold 5, the outer surface 6C located on the outside of the circumferential groove 6a formed on the upper surface side of the middle mold 6 is located above the inner surface 6d located on the inner side of the circumferential groove 6a by the predetermined dimension S. A step portion 6e having the same height as the inner surface 6d is recessed in the ridgeline between the outer surface 6C and the circumferential groove 6a. On the other hand, the outer surface 6f located on the outside of the circumferential groove 6b formed on the lower surface side is located below the inner surface 6g located on the inner side of the circumferential groove 6b by a predetermined dimension S, and the outer surface 6f and the circumferential surface Groove 6b
A stepped portion 6h having the same height as the inner surface 6g is recessed in the ridgeline portion. Further, the outside of the upper outer surface 6C corresponds to the shape of the step 5g of the lower mold 5 and extends downward to a step 61, while the further outside of the lower outer surface 6f corresponds to the shape of the step 5g of the lower mold 5. A step portion 6 that goes downward in accordance with the shape of the step portion 5g.
Each is consecutive to j. It should be noted that a plurality of these medium molds 6 are prepared depending on the number of round belts to be manufactured in one process.

上型7は基本的に前記中型6と同様のリング状の部材で
あって、その外径は前記下型5と略同寸法に設定されて
いる。そして、この上型7の外周縁近傍の下面には、前
記下型5及び中型6と同様の周回溝7aが凹設されてい
る。また、この周回溝7aより外側に位置する外側面7
bは周回溝7aより内側に位置する下面7Cよりも前記
所定寸法Sだけ下方に位置し、この外側面7bと周回溝
7aとの稜線部分には内側面7Cと同じ高さの段部7d
が凹設されている。また、この外側面7bの更に外側に
は前記中型6の段部61の形状に合致して下方へ向かう
段部7eが形成され、該段部7eの外側の外周縁部7f
には、複数の貫通孔7gが前記下型5のネジ孔51に対
応して形成されている。
The upper mold 7 is basically a ring-shaped member similar to the middle mold 6, and its outer diameter is set to be approximately the same size as the lower mold 5. A circumferential groove 7a similar to that of the lower mold 5 and the middle mold 6 is formed in the lower surface of the upper mold 7 near its outer periphery. Also, the outer surface 7 located outside this circumferential groove 7a
b is located below the lower surface 7C located inside the circumferential groove 7a by the predetermined dimension S, and a step portion 7d having the same height as the inner surface 7C is provided on the ridgeline between the outer surface 7b and the circumferential groove 7a.
is recessed. Furthermore, a step portion 7e extending downward matching the shape of the step portion 61 of the medium mold 6 is formed further outside the outer surface 7b, and an outer peripheral edge portion 7f on the outside of the step portion 7e.
, a plurality of through holes 7g are formed corresponding to the screw holes 51 of the lower mold 5.

締結部材8は、上記各型5,6.7を一体的に組付ける
もので、上型7の貫通孔7gを挿通可能な径を有する挿
通部8aと、この挿通部8aの先端に形成され、下型5
のネジ孔51に螺合するネジ部8bと、前記挿通部8a
の上端に形成された把持部8Cとからなる。
The fastening member 8 is for integrally assembling the molds 5, 6.7, and includes an insertion portion 8a having a diameter that allows insertion through the through hole 7g of the upper mold 7, and a tip of the insertion portion 8a. , lower mold 5
a threaded portion 8b that is screwed into the screw hole 51 of the
It consists of a grip part 8C formed at the upper end of the.

このような構成により、各型5,6.7を組付0 けた状態では各周囲溝5c、6a、6b、7aによって
断面円形状のキャビティが形成されると共に、各段部5
f、6e、6h、7eによってベルト材料注入用の開口
が形成されることになる。
With this configuration, when each mold 5, 6.7 is assembled, a cavity with a circular cross section is formed by each peripheral groove 5c, 6a, 6b, 7a, and each step 5
f, 6e, 6h, and 7e form openings for injecting belt material.

次に、上述したベルト製造装置1によるベルト製造方法
について説明する。先ず、上記金型の各型5,6.7を
シャフト3aに組付ける。この場合、シャフト3aの上
端に下型5のボス部5bを外挿させた状態でシャフト3
aの先端面3gに形成されたネジ孔3hに座付きボルト
9を螺着させ、このボルト9の締結により下型5をシャ
フト3aに回転一体に取付ける。その後、下型5の段部
5gと1つ目の中型6の下側の段部6jの位置を一致さ
せて、下型5に中型6を載置する。これによって、前記
下型5上面の周回溝50と、中型6下面の周回溝6bと
によって円形断面のキャビティS1が形成される。
Next, a belt manufacturing method using the belt manufacturing apparatus 1 described above will be explained. First, the molds 5, 6.7 of the molds described above are assembled onto the shaft 3a. In this case, the shaft 3 is inserted into the upper end of the shaft 3a with the boss portion 5b of the lower mold 5
A bolt 9 with a seat is screwed into a screw hole 3h formed in the tip end surface 3g of the shaft 3a, and by tightening the bolt 9, the lower die 5 is attached to the shaft 3a so as to rotate integrally. Thereafter, the middle mold 6 is placed on the lower mold 5 with the step 5g of the lower mold 5 and the lower step 6j of the first middle mold 6 aligned. As a result, a cavity S1 having a circular cross section is formed by the circumferential groove 50 on the upper surface of the lower mold 5 and the circumferential groove 6b on the lower surface of the middle mold 6.

その後、順に2つ目以降の複数枚(本例のものは6枚)
の中型6,6.・・・を各段部6i、6jを一致させた
状態で重ね合わせていく。これによつ1 て、最上部の中型6を除き、各中型6,6.・・・の上
側の周回溝6aと、その上方に載置された中型6の下側
の周回溝6bとの間にも前記キャビティS1と同様のキ
ャビティS2〜S7が形成される。
After that, the second and subsequent sheets (6 sheets in this example)
Medium size 6,6. ... are overlapped with each step portion 6i, 6j aligned. As a result, each of the medium molds 6, 6. Cavities S2 to S7 similar to the cavity S1 are also formed between the upper circumferential groove 6a and the lower circumferential groove 6b of the middle mold 6 placed above it.

更に、上型7を、その貫通孔7gの位置を前記下型5の
ネジ孔51の位置に対応させた状態で、最上部の中型6
に載置する。このことで、該最上部の中型6の上側の周
回溝6aと、上型7に形成された周回溝7aとによって
キャビティS8が形成される。そして、このようにして
形成された各キャビティs、−5sの内周側には、上述
したように各型5. 6. 7の上面及び下面の高さが
各周回溝5c、6a、6b、7aの内側と外側とにおい
て異なっていることで約0..2mmの環状の開口部1
0が形成される。また、前記各キャビティ81〜S8の
外周側には前述した段部5f、  6e。
Furthermore, with the upper mold 7 in a state where the position of the through hole 7g corresponds to the position of the screw hole 51 of the lower mold 5, the uppermost middle mold 6 is
Place it on. As a result, a cavity S8 is formed by the upper circumferential groove 6a of the uppermost middle mold 6 and the circumferential groove 7a formed in the upper mold 7. Then, as described above, each mold 5. 6. The heights of the upper and lower surfaces of the circumferential grooves 5c, 6a, 6b, and 7a are different on the inside and outside of each circumferential groove 5c, 6a, 6b, and 7a. .. 2mm annular opening 1
0 is formed. Furthermore, the above-mentioned stepped portions 5f and 6e are provided on the outer peripheral side of each of the cavities 81 to S8.

6h、7eによってパリ溝F1〜F8が形成される。Paris grooves F1 to F8 are formed by 6h and 7e.

このようにして各型5. 6. 7を重ね合わせた状態
で、前記上型7外周の各貫通孔7gに夫々締2 活部材8を挿通し、その先端を下型5のネジ孔51に螺
合させることによって、各型5,6.7を一体的に組付
ける。
In this way, each type 5. 6. 7 are stacked on top of each other, each of the molds 5, 6. Assemble 7 in one piece.

この後、モータ3dを駆動すると、その回転はVベルト
3fを介してシャフト3aに伝達され、このシャフト3
aの回転に伴なって、各型5,6゜7が一体的に回転す
る。この時の金型4の回転数は700 r、p、m、な
どに設定される。そして、この回転させた状態で金型4
を例えば100℃に加熱し、その金型4内に液状ゴムを
投入する。この液状ゴムは例えば液状ポリエーテル系ポ
リウレタなどが採用され、アジピン酸などの配合剤が混
入されており、金型温度と略同温まで加熱されている。
After that, when the motor 3d is driven, its rotation is transmitted to the shaft 3a via the V-belt 3f.
With the rotation of a, each mold 5, 6° 7 rotates integrally. The rotation speed of the mold 4 at this time is set to 700 r, p, m, etc. Then, in this rotated state, the mold 4
is heated to, for example, 100° C., and liquid rubber is poured into the mold 4. This liquid rubber is made of, for example, liquid polyether polyurethane, mixed with a compounding agent such as adipic acid, and heated to approximately the same temperature as the mold temperature.

そして、この注入された液状ゴムは前記回転による遠心
力を受けるために、速やかに開口10からキャビティ8
1〜S8及びパリ溝F1〜F8に充填されていく。液状
ゴムの投入から所定時間を経過して、この液状ゴムがキ
ャビティ81〜S8に充満した後、引き続き、この回転
を維持した状態で液状ゴムを脱気して所定時間(例えば
5分)を3 もって硬化させる。この硬化により、液状ゴムがキャビ
ティ81〜S8及びパリ溝F1〜F8に対応した所定形
状に形成される。その後、モータ3dの回転を停止し、
金型4を上記と逆の手順で各型5. 6. 7を分割し
て第4図に示すようなベルト体11を得る。この後、こ
のベルト体11の内周側及び外周側に張出しているバリ
llaを切削して製品としてのリング状丸ベルトを得る
Then, the injected liquid rubber is quickly transferred from the opening 10 to the cavity 8 in order to receive the centrifugal force caused by the rotation.
1 to S8 and paris grooves F1 to F8. After a predetermined period of time has elapsed since the injection of the liquid rubber, and the cavities 81 to S8 are filled with the liquid rubber, the liquid rubber is degassed and heated for a predetermined period of time (for example, 5 minutes) while maintaining this rotation. Let it harden. By this curing, the liquid rubber is formed into a predetermined shape corresponding to the cavities 81 to S8 and the paris grooves F1 to F8. After that, the rotation of the motor 3d is stopped,
Place mold 4 in the reverse order to each mold 5. 6. 7 is divided to obtain a belt body 11 as shown in FIG. Thereafter, the burrs protruding from the inner and outer circumferential sides of the belt body 11 are cut to obtain a ring-shaped round belt as a product.

このように、本実施例による方法では、液状ゴムを用い
ているために、その粘性及びポットライフの自由度の向
上が図れる。また、遠心力によって速やかに液状ゴムを
キャビティS1〜S8に充填することができるため、ベ
ルト全周を均一に成形することができ、ベルト強度が向
上される。更には、金型4の回転数を変更するといった
簡単な操作で遠心力、即ち液状ゴムをキャビティ81〜
S8に充填する圧力を変更することができる。また、前
記キャビティ81〜S8の外周側にはパリ溝F1〜F8
を形成するようにしたために、液状ゴムを充填する際に
キャビティ81〜S8に空気4 が残留してもこの空気はパリ溝F1〜F8へ押し込めら
れることになり、キャビティ81〜S8に液状ゴムが充
填されてない部分が発生することを防止できる。
As described above, in the method according to this embodiment, since liquid rubber is used, the viscosity and pot life can be improved. Moreover, since the cavities S1 to S8 can be quickly filled with liquid rubber by centrifugal force, the entire circumference of the belt can be uniformly formed, and the strength of the belt is improved. Furthermore, by a simple operation such as changing the rotation speed of the mold 4, centrifugal force, that is, liquid rubber can be transferred to the cavities 81~
The pressure at which S8 is filled can be changed. Furthermore, paris grooves F1 to F8 are provided on the outer circumferential side of the cavities 81 to S8.
Therefore, even if air 4 remains in the cavities 81 to S8 when filling the liquid rubber, this air will be forced into the paring grooves F1 to F8, and the liquid rubber will not be in the cavities 81 to S8. It is possible to prevent unfilled portions from occurring.

尚、本実施例では、中型6を7個採用し、−工程8本取
りの場合について述べたが、この中型6の個数を増やせ
ば、−工程で、より多数のベルトを得るような構成とす
ることもできる。
In addition, in this embodiment, a case has been described in which seven medium-sized molds 6 are used and eight belts are taken in the - process, but if the number of medium-sized molds 6 is increased, a larger number of belts can be obtained in the - process. You can also.

(発明の効果) 上述したように、請求項(1)の発明に係る製造方法に
よれば、金型の回転による遠心力によって前記ベルト材
料をキャビティに充填させた後、金型の回転を維持させ
た状態でベルト材料を硬化させるために、ベルト材料を
速やかに所定形状に成形することで、ベルト全周を均一
に成形することができ、且つ、従来のようなウェルドラ
イン部分やゲート部分が存在しないことで運転中におけ
る切断要因部分が無く、ベルト強度が向上する。また、
流動性を有するベルト材料を用いているために、成形時
におけるベルト材料の粘性及びポットライ5 フの自由度の向上が図れる。
(Effects of the Invention) As described above, according to the manufacturing method according to the invention of claim (1), after the belt material is filled into the cavity by the centrifugal force caused by the rotation of the mold, the rotation of the mold is maintained. By quickly forming the belt material into a predetermined shape in order to harden the belt material in a state where the belt material is Due to its absence, there is no part that causes breakage during operation, and belt strength is improved. Also,
Since a fluid belt material is used, the viscosity of the belt material during molding and the flexibility of the pot life can be improved.

請求項(2)の発明に係る製造装置によれば、金型部材
を重ね合わせるのみでキャビティ及びベルト注入用の開
口が形成されるため、丸ベルトの製造作業の簡略化が図
れる。
According to the manufacturing apparatus according to the invention of claim (2), the cavity and the belt injection opening are formed simply by overlapping the mold members, so that the round belt manufacturing operation can be simplified.

【図面の簡単な説明】[Brief explanation of drawings]

第1図〜第4図は本発明の一実施例を示し、第1図は金
型がシャフトに取付けられた状態を示す縦断面図、第2
図は金型を分解したキャビティ周辺部分の縦断面図、第
3図はベルト製造装置の全体図、第4図は脱型されたベ
ルト体の縦断斜視図である。 1・・・ベルト製造装置 4・・・金型 5・・・下型 6・・・中型 7・・・上型 10・・・開口 6 特開平3−211042(7)
Figures 1 to 4 show an embodiment of the present invention, with Figure 1 being a vertical cross-sectional view showing the state in which the mold is attached to the shaft, and Figure 2 being a vertical cross-sectional view showing the state where the mold is attached to the shaft.
The figure is a vertical cross-sectional view of the cavity surrounding area with the mold disassembled, FIG. 3 is an overall view of the belt manufacturing apparatus, and FIG. 4 is a vertical cross-sectional perspective view of the belt body removed from the mold. 1... Belt manufacturing device 4... Mold 5... Lower die 6... Middle die 7... Upper die 10... Opening 6 JP-A-3-211042 (7)

Claims (2)

【特許請求の範囲】[Claims] (1)ゴム製の丸ベルト等の製造方法であって、円周方
向に延びる断面円形状のキャビティを有し、且つ内周面
の分割部に上記キャビティに連通するベルト材料注入用
の開口が全周に亘って形成されたリング状の金型を用意
し、流動性を有する硬化性のベルト材料を、金型のリン
グ中心回りの回転による遠心力によって前記開口からキ
ャビティに流し込んで充填させ且つ金型の回転を維持し
た状態で硬化させることを特徴とする丸ベルト等の製造
方法。
(1) A method for manufacturing a rubber round belt, etc., which has a cavity with a circular cross section extending in the circumferential direction, and an opening for injecting belt material that communicates with the cavity in a divided portion of the inner peripheral surface. A ring-shaped mold formed around the entire circumference is prepared, and a fluid curable belt material is poured into the cavity through the opening by centrifugal force caused by rotation of the mold around the center of the ring, and A method for manufacturing round belts, etc., characterized by curing while maintaining the rotation of a mold.
(2)複数のリング状金型部材が重ね合わされて成り、
重合される金型部材間に円周方向に延びる断面円形状の
キャビティが形成され、金型部材の内周面の重合部に上
記キャビティに連通するベルト材料注入用の開口が全周
に亘って形成された金型と、 流動性を有する硬化性のベルト材料が、遠心力によって
前記開口からキャビティに流れ込むように、前記金型を
、そのリング中心回りに回転駆動させる駆動手段とを備
えたことを特徴とする丸ベルト等の製造装置。
(2) Consisting of a plurality of ring-shaped mold members stacked on top of each other,
A cavity with a circular cross section extending in the circumferential direction is formed between the mold members to be superposed, and an opening for injecting belt material communicating with the cavity is provided around the entire circumference at the overlapping part of the inner peripheral surface of the mold member. a formed mold; and a driving means for driving the mold to rotate around the center of the ring so that a fluid curable belt material flows into the cavity from the opening by centrifugal force. Manufacturing equipment for round belts, etc., featuring:
JP2007570A 1990-01-16 1990-01-16 Manufacturing method and manufacturing apparatus for round belt Expired - Lifetime JPH06104341B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007570A JPH06104341B2 (en) 1990-01-16 1990-01-16 Manufacturing method and manufacturing apparatus for round belt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007570A JPH06104341B2 (en) 1990-01-16 1990-01-16 Manufacturing method and manufacturing apparatus for round belt

Publications (2)

Publication Number Publication Date
JPH03211042A true JPH03211042A (en) 1991-09-13
JPH06104341B2 JPH06104341B2 (en) 1994-12-21

Family

ID=11669470

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2007570A Expired - Lifetime JPH06104341B2 (en) 1990-01-16 1990-01-16 Manufacturing method and manufacturing apparatus for round belt

Country Status (1)

Country Link
JP (1) JPH06104341B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104295665A (en) * 2014-11-10 2015-01-21 宁波凯驰胶带有限公司 High-torque synchronous belt preparation method
CN104476789A (en) * 2014-11-10 2015-04-01 宁波凯驰胶带有限公司 Preparation method of colorful synchronous belt

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62148216A (en) * 1985-12-23 1987-07-02 Utsumi Koki Kk Method and apparatus for casting

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62148216A (en) * 1985-12-23 1987-07-02 Utsumi Koki Kk Method and apparatus for casting

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104295665A (en) * 2014-11-10 2015-01-21 宁波凯驰胶带有限公司 High-torque synchronous belt preparation method
CN104476789A (en) * 2014-11-10 2015-04-01 宁波凯驰胶带有限公司 Preparation method of colorful synchronous belt
CN104476789B (en) * 2014-11-10 2016-06-29 宁波凯驰胶带有限公司 A kind of color burst band preparation method

Also Published As

Publication number Publication date
JPH06104341B2 (en) 1994-12-21

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