JPH02167731A - Preparation of toothed endless belt - Google Patents
Preparation of toothed endless beltInfo
- Publication number
- JPH02167731A JPH02167731A JP63324320A JP32432088A JPH02167731A JP H02167731 A JPH02167731 A JP H02167731A JP 63324320 A JP63324320 A JP 63324320A JP 32432088 A JP32432088 A JP 32432088A JP H02167731 A JPH02167731 A JP H02167731A
- Authority
- JP
- Japan
- Prior art keywords
- elastomer
- belt
- reinforcing
- reinforcing cloth
- buffer layer
- 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
- 239000004744 fabric Substances 0.000 claims abstract description 77
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 75
- 229920001971 elastomer Polymers 0.000 claims abstract description 61
- 239000000806 elastomer Substances 0.000 claims abstract description 60
- 239000000463 material Substances 0.000 claims abstract description 48
- 238000005266 casting Methods 0.000 claims abstract description 11
- 239000010410 layer Substances 0.000 claims description 42
- 239000002344 surface layer Substances 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 239000004433 Thermoplastic polyurethane Substances 0.000 abstract description 2
- 229920002803 thermoplastic polyurethane Polymers 0.000 abstract description 2
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 229920002635 polyurethane Polymers 0.000 description 12
- 239000004814 polyurethane Substances 0.000 description 12
- 238000011282 treatment Methods 0.000 description 11
- 238000005470 impregnation Methods 0.000 description 7
- 238000000465 moulding Methods 0.000 description 7
- 238000007789 sealing Methods 0.000 description 7
- 239000000835 fiber Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 4
- 230000009191 jumping Effects 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 229920001875 Ebonite Polymers 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000009958 sewing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- 239000012209 synthetic fiber Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003233 aromatic nylon Polymers 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Landscapes
- Moulding By Coating Moulds (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は注型用エラストマーによって成形され、歯部表
面に補強布が装着されてなる歯付無端ベルトの製造方法
に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for manufacturing a toothed endless belt formed from a casting elastomer and having reinforcing cloth attached to the surface of the teeth.
（従来の技術）
従来、抗張体を芯として注型用ポリウレタン等の注型用
エラストマーによって成形された歯付無端ベルトは、そ
の素材の持つ特性から、ゴム屑等による汚れをきらう動
力伝達系や搬送系におけるタイミングベルト等として使
用されている。(Prior art) Conventionally, toothed endless belts made of castable elastomers such as castable polyurethane with a tensile material as a core have been used as power transmission systems that avoid contamination by rubber debris etc. due to the characteristics of the material. It is used as a timing belt in transportation systems.
近年、騒音の低下や耐久性の向上のため、注型用エラス
トマーによって形成された歯部表面に補強布を配し、か
つ補強布と歯部との間に不浸透性エラストマーによって
緩衝層を形成した歯付無端ベルトが知られている。この
ベルトは、本出願人が特開昭６３−２１４５３８号公報
によって提案したものである。In recent years, in order to reduce noise and improve durability, reinforcing fabric has been placed on the surface of the teeth formed from cast elastomer, and a buffer layer has been formed between the reinforcing fabric and the teeth using impermeable elastomer. A toothed endless belt is known. This belt was proposed by the present applicant in Japanese Unexamined Patent Publication No. 63-214538.
このベルトは、前記緩衝層によって補強布が目止めされ
た状態となるため、成形用金型内に注入充填された液状
注型用エラストマーを加圧することによって、同金型の
歯部成形用凹凸部に装着された補強布の背面（緩衝層側
の面）に圧力を作用させ、補強布を凹凸部表面に沿って
伸長させ、ベルトの成形と同時に補強布を歯形成形する
ことができる利点がある。Since this belt is in a state where the reinforcing cloth is sealed by the buffer layer, by pressurizing the liquid casting elastomer injected into the mold, the unevenness for forming the teeth of the mold is applied. The advantage of this method is that pressure is applied to the back surface of the reinforcing fabric attached to the belt (the surface facing the buffer layer), and the reinforcing fabric is stretched along the surface of the uneven part, allowing the reinforcing fabric to be shaped into teeth at the same time as the belt is formed. be.
前記緩衝層は、通常、補強布に液状エラストマーを数回
塗布することによって補強布を目止めすると共に形成さ
れるが、目止めの完全性に乏しく、また作業が煩雑であ
る。これに対して同エラストマーによって形成されたシ
ート材を補強布にシート材の軟化点以下の温度で熱圧着
することにより、容易かつ完全に緩衝層を形成すること
ができる。The buffer layer is usually formed by sealing the reinforcing fabric by applying a liquid elastomer to the reinforcing fabric several times, but the sealing is not complete and the work is complicated. On the other hand, by thermocompression bonding a sheet material made of the same elastomer to a reinforcing cloth at a temperature below the softening point of the sheet material, a buffer layer can be easily and completely formed.
（発明が解決しようとする課題）
前記補強布および緩衝層が設けられた歯付ベルトによっ
て、成形の容易化および騒音の低下が図られたものの、
不浸透性エラストマーによって形成されたシート材を補
強布に熱圧着して緩衝層を形成する場合、両者の接着性
が悪く、また補強布の糸状繊維がそのままの状態で表面
に露呈するため、補強布の損傷が著しく、十分な耐久性
が得られていないのが実情である。(Problems to be Solved by the Invention) Although the toothed belt provided with the reinforcing cloth and the buffer layer facilitates molding and reduces noise,
When forming a buffer layer by thermally bonding a sheet material made of an impermeable elastomer to a reinforcing cloth, the adhesion between the two is poor, and the thread-like fibers of the reinforcing cloth are exposed on the surface as they are, so the reinforcing The reality is that the fabric is severely damaged and does not have sufficient durability.
本発明はかかる問題点に鑑みなされたもので、不浸透性
エラストマーによって形成されたシート材を補強布に熱
圧着して緩衝層を形成するに際し、両者の接着力を改善
すると共にベルトの耐久性を飛躍的に向上させることが
できる歯付無端ベルトの製造方法を提供することを目的
とする。The present invention was developed in view of the above problems, and it improves the adhesive force between the two and improves the durability of the belt when bonding a sheet material made of an impermeable elastomer to a reinforcing cloth by thermocompression to form a buffer layer. The purpose of the present invention is to provide a method for manufacturing a toothed endless belt that can dramatically improve the performance of the toothed endless belt.
（課題を解決するための手段）
上記目的を達成するためになされた本発明の歯付無端ベ
ルトの製造方法は、同心状に配置された内外金型８．９
の内、歯部３．２５．２９形成用凹凸部が形成された金
型に不浸透性エラストマーにより形、威された緩衝層７
を有する伸長可能な補強布４．２７゜３１を装着し、該
補強布４，２７．３１と他の金型との間に抗張体６を装
着した後、内外金型８，９間の空間１０に液状注型用エ
ラストマー１６を注入し、該エラストマー１６を加圧す
ることにより補強布４，２７．３１を伸長させて金型の
凹凸部に沿て成形すると共に該エラストマー１６を固化
する歯付無端ベルトの製造方法において、
補強布４．２７．３１に予め耐久性および接着性向上の
ためのエラストマーを含浸し、含浸された補強布４．２
７．３１に不浸透性エラストマーによって形成されたシ
ート材２０を熱圧着して緩衝層７を形成することを発明
の構成とするものである。(Means for Solving the Problems) A method for manufacturing a toothed endless belt according to the present invention, which has been made to achieve the above object, has a method for manufacturing a toothed endless belt in which inner and outer molds 8.9 are concentrically arranged.
Among them, the buffer layer 7 is shaped and molded with impermeable elastomer in the mold in which the uneven parts for forming the tooth parts 3,25,29 are formed.
After installing a stretchable reinforcing cloth 4,27.31 having a A tooth that injects a liquid casting elastomer 16 into the space 10 and pressurizes the elastomer 16 to stretch the reinforcing cloth 4, 27, 31 and mold it along the irregularities of the mold, while solidifying the elastomer 16. In the method for producing an endless belt, the reinforcing fabric 4.27.31 is pre-impregnated with an elastomer to improve durability and adhesion, and the impregnated reinforcing fabric 4.2
7.31, the buffer layer 7 is formed by thermocompression bonding a sheet material 20 made of an impermeable elastomer.
この際、シート材として低軟化点エラストマーで形成さ
れた表面層と高軟化点エラストマーで形成された裏面層
とが接合一体化した２層構造のものを使用し、表面層を
補強布側として低軟化点以上高軟化点未満の温度で熱圧
着すると効果的である。At this time, a sheet material with a two-layer structure in which a surface layer made of a low softening point elastomer and a back layer made of a high softening point elastomer are bonded and integrated is used, and the surface layer is used as the reinforcing fabric side. Thermocompression bonding at a temperature higher than the softening point and lower than the high softening point is effective.
（作 用）
本発明に係る補強布は、予め耐久性および接着性向上の
ためのエラストマーが含浸されているので、不浸透性エ
ラストマーによって形成された緩衝層を形成するための
シート材との熱圧着による接着性は良好となり、また、
従来の補強布のように糸状繊維がそのままの状態で表面
に露呈することがないので、本発明に係る補強布は損傷
し難く、ひいてはベルトの耐久性、寿命が向上する。(Function) Since the reinforcing fabric according to the present invention is impregnated with an elastomer to improve durability and adhesion, it can be heated with a sheet material to form a buffer layer made of an impermeable elastomer. Adhesion by pressure bonding is good, and
Unlike conventional reinforcing fabrics, the thread-like fibers are not exposed on the surface as they are, so the reinforcing fabric according to the present invention is less likely to be damaged, and as a result, the durability and life of the belt are improved.
また、シート材として低軟化点エラストマーで形成され
た表面層と高軟化点エラストマーで形成された裏面層と
が接合一体化したものを使用し、表面層を補強布側とし
て低軟化点以上高軟化点未満の温度で熱圧着すると、表
面層が溶融して補強布の織目に埋入した状態となり、補
強布と緩衝層（すなわち２層シート材の裏面層）との接
合強度の向上および補強布自体の耐久性向上に資するこ
とができる。In addition, a sheet material in which a surface layer made of a low softening point elastomer and a back layer made of a high softening point elastomer are bonded and integrated is used, and the surface layer is used as the reinforcing fabric side to soften the material at a high softening point or higher. When thermocompression bonding is carried out at a temperature below 100%, the surface layer melts and becomes embedded in the weave of the reinforcing fabric, improving and reinforcing the bonding strength between the reinforcing fabric and the buffer layer (i.e., the back layer of the two-layer sheet material). This can contribute to improving the durability of the cloth itself.
（実施例）
以下、本発明の歯付無端ベルトの製造方法をその製造対
象と共に説明する。(Example) Hereinafter, the method for manufacturing a toothed endless belt of the present invention will be explained together with the object to be manufactured.
第１図は、ベルト本体１の内周面側にランド部２を介し
て歯部３が周方向に等間隔おきに一体形成され、その歯
部３及びランド部２の表面に所定のエラストマーが含浸
された補強布４が設けられた無端ベルト５を示す。ベル
ト本体ｌ及び歯部３は注型用ポリウレタン等の注型用エ
ラストマー材料から威り、そのベルト本体１内には抗張
体６が螺旋状に埋込まれている。歯部３と補強布４との
間には、第２図に示すように熱可塑性ポリウレタン等の
不浸透性エラストマー材料から成る緩衝層７が全面にわ
たって略均−な厚さで設けられている。FIG. 1 shows that tooth portions 3 are integrally formed on the inner circumferential surface of a belt main body 1 via land portions 2 at equal intervals in the circumferential direction, and a predetermined elastomer is coated on the surfaces of the tooth portions 3 and land portions 2. 1 shows an endless belt 5 provided with an impregnated reinforcing fabric 4; The belt body 1 and the teeth 3 are made of castable elastomer material such as castable polyurethane, and a tensile body 6 is spirally embedded in the belt body 1. As shown in FIG. 2, a buffer layer 7 made of an impermeable elastomer material such as thermoplastic polyurethane is provided between the teeth 3 and the reinforcing cloth 4 with a substantially uniform thickness over the entire surface.
第３図は無端ベルト５の製造に使用する金型装置を示す
。即ち、第３図において、８は内金型、９は外金型で、
これら内外金型８．９は所定の空間１０を形成すべく同
心状に設けられ、かつ分離自在である。内外金型８．９
の上下両端には上Ｍ１１と下Ｍ１２とが着脱自在に設け
られており、この上下蓋１１．１２により内外金型８．
９間の空間１０を密閉するようになっている。また上蓋
ｌｌには空間ＩＯに連通ずるように脱気孔１３が形成さ
れ、その脱気孔１３には着脱自在に開閉ネジ１４が螺着
されている。１５は液状注型用エラストマー材料１６を
入れた注型用容器で、注入管１７を介して外金型９側に
取付けられ、ピストン１８を加圧することによりエラス
トマー材料１６を管１７から内外金型８．９の空間ｌＯ
に注型できるようになっている。内金型８の外周には、
第４図及び第５図に示すように、無端ベルト５の歯部３
を成形するための凹凸部１９が全周にわたって設けられ
ている。FIG. 3 shows a mold apparatus used for manufacturing the endless belt 5. As shown in FIG. That is, in FIG. 3, 8 is an inner mold, 9 is an outer mold,
These inner and outer molds 8.9 are provided concentrically to form a predetermined space 10, and are separable. Inner and outer mold 8.9
An upper M11 and a lower M12 are removably provided at both upper and lower ends of the mold 8.
The space 10 between the spaces 9 and 9 is hermetically sealed. Further, a deaeration hole 13 is formed in the upper lid 11 so as to communicate with the space IO, and an opening/closing screw 14 is screwed into the deaeration hole 13 in a detachable manner. 15 is a casting container containing a liquid casting elastomer material 16, which is attached to the outer mold 9 side via an injection pipe 17, and by pressurizing a piston 18, the elastomer material 16 is poured from the pipe 17 into the inner and outer molds. 8.9 space lO
It can be cast into. On the outer periphery of the inner mold 8,
As shown in FIGS. 4 and 5, the toothed portion 3 of the endless belt 5
A concavo-convex portion 19 for molding is provided over the entire circumference.
前記無端ベルト５を製造するには、まず、補強布に耐久
性向上のためのエラストマーを含浸する。To manufacture the endless belt 5, first, a reinforcing cloth is impregnated with an elastomer to improve durability.
補強布は、ナイロンやポリエステル等の合成繊維糸、ゴ
ム糸等によって形成された伸縮性の大きい織物、編物お
よび同繊維によって形成された不織布を利用することが
できる。織糸（編糸を含む。As the reinforcing cloth, highly elastic woven or knitted fabrics made of synthetic fiber threads such as nylon or polyester, rubber threads, etc., and nonwoven fabrics made of the same fibers can be used. Weaving yarn (including knitting yarn).
）としては単糸、双糸、より糸のほか捲縮加工糸も使用
することができる。織物としては平織、綾織、朱子織等
積々のものが使用される。) can be made of single yarn, double yarn, twine, or crimped yarn. The fabrics used include plain weave, twill weave, and satin weave.
前記補強布に含浸するエラストマーとしては、摩擦係数
が低く、耐摩耗性の良好なものほどよい。The elastomer to be impregnated into the reinforcing cloth is preferably one with a low coefficient of friction and good abrasion resistance.
すなわちモジュラスが大きく硬質のものがよい。In other words, a material with a large modulus and hardness is preferable.
しかし、含浸後の補強布４の成形性を考慮する必要があ
り、１００％モジュラスが１０〜３５０ｋｇｆ ／ ｃ
ｒＡ （望ましくは３０〜２５０ｋｇｆ ／ ｃ４）の
ポリウレタン等のエラストマーが使用される。含浸の方
法としては、通常、樹脂を溶剤に溶かして粘度調整（望
ましくは５００００ｃｐｓ以下）した処理液に浸漬する
ことによって行われる。However, it is necessary to consider the formability of the reinforcing cloth 4 after impregnation, and the 100% modulus is 10 to 350 kgf/c.
An elastomer such as polyurethane with rA (preferably 30-250 kgf/c4) is used. The impregnation method is usually carried out by immersing the resin in a treatment liquid in which the resin is dissolved in a solvent and the viscosity is adjusted (preferably to 50,000 cps or less).
所定の含浸処理がなされた補強布４は、次に不浸透性エ
ラストマーによって形成されたシート材が熱圧着されて
緩衝Ｎ７が形成され、これによって目止め処理（織目の
空間を塞ぐこと）される。The reinforcing cloth 4, which has been subjected to a predetermined impregnation treatment, is then thermocompressed with a sheet material made of an impermeable elastomer to form a buffer N7, which is then subjected to a sealing treatment (closing the spaces between the weaves). Ru.
シート材の材質としては、製品にしたときの硬さがデュ
ロメータＡ２０〜Ｄ８０（好ましくはＪＩＳＡ４０〜デ
エロメータＤ６０）のポリウレタン等の前記含浸用エラ
ストマーと同質のエラストマー（熱可塑性、熱硬化性の
いずれでもよい、）が使用される。The material for the sheet material is an elastomer (either thermoplastic or thermosetting) that is the same as the impregnating elastomer, such as polyurethane, with a durometer of A20 to D80 (preferably JISA40 to D60) when made into a product. , ) are used.
第６図はシート材２０の熱圧着作業例を示しており、補
強布４及びシート材２０は、ロール２２．２３に夫に巻
取っておき、この両ロール２２．２３から矢印方向に引
出した部分を上下に重ね合わせた状態で順次熱プレス２
１により積層加工する。なお、シート材２０は厚さ０．
０１〜２．５Ｍ程度のものが使用され、熱圧着温度はシ
ート材が単一材質の場合、同材質の軟化点以下（好まし
くは軟化点以下５０〜１５０ ’Ｃの範囲）とされる。FIG. 6 shows an example of thermocompression bonding of the sheet material 20. The reinforcing cloth 4 and the sheet material 20 are wound around rolls 22 and 23, and the portions pulled out from both rolls 22 and 23 in the direction of the arrow are shown in FIG. Heat press 2 in sequence with the top and bottom stacked
Lamination processing is performed according to step 1. Note that the sheet material 20 has a thickness of 0.
When the sheet material is made of a single material, the thermocompression bonding temperature is set to be below the softening point of the same material (preferably in the range of 50 to 150'C below the softening point).
熱圧着するシート材としては、単一材質のものに限らず
、軟化点の異なるエラストマーによって２層に形成され
たものを用いることができる。この場合、低軟化点以上
、高軟化点未満の温度で熱圧着する。低軟化点のエラス
トマーが織目に埋入した状態となり、接着性および耐久
性の向上に資することができるからである。この場合、
軟化温度の差は作業性から５層Ｃ以上取るのがよい。The sheet material to be thermocompressed is not limited to one made of a single material, but may be one made of two layers of elastomers with different softening points. In this case, thermocompression bonding is carried out at a temperature higher than the low softening point and lower than the high softening point. This is because the elastomer with a low softening point is embedded in the weave, contributing to improved adhesiveness and durability. in this case,
The difference in softening temperature is preferably 5 layers C or more from the viewpoint of workability.
次に、この補強布４を裁断し、ミシンによる縫着、熱プ
レスによる接着や融着等によって筒状にエンドレス加工
した後、金型装置の内金型８に外嵌状に装着し、その補
強布４の外側から内金型８に抗張体６を螺旋状に巻着す
る。抗張体６は、芳香族ボリアミド、ナイロン、ポリエ
ステル等の合成繊維ロープ、スチールワイヤー等が用い
られる。Next, this reinforcing cloth 4 is cut and processed into an endless cylindrical shape by sewing with a sewing machine, gluing or fusing with a heat press, etc., and then it is attached to the inner mold 8 of the mold device in an outer-fitting manner. The tensile member 6 is spirally wound around the inner mold 8 from the outside of the reinforcing cloth 4. As the tensile member 6, a synthetic fiber rope such as aromatic polyamide, nylon, or polyester, a steel wire, or the like is used.
内金型８に対する補強布４、抗張体６の装着が完了すれ
ば、この内金型８を外金型９内に挿入して内外金型８．
９を所定の空間１０ができるように組合わせる。この時
、補強布４の幅方向の両端部を内金型８の上下両端から
中心側に折曲げておき、この内金型８と上下１ｉ１１．
１２との間で補強布４の両端部を挟込んで固定する。Once the reinforcing cloth 4 and the tensile material 6 have been attached to the inner mold 8, the inner mold 8 is inserted into the outer mold 9 and the inner and outer molds 8.
9 are combined to form a predetermined space 10. At this time, both ends of the reinforcing cloth 4 in the width direction are bent from both upper and lower ends of the inner mold 8 toward the center, and the inner mold 8 and the upper and lower ends 1i11.
Both ends of the reinforcing cloth 4 are sandwiched and fixed between the reinforcing cloth 4 and the reinforcing cloth 12.
そして、内外金型８．９全体をエラストマーの硬化温度
に加熱した後、注型用容器１５内の液状エラストマー材
料１６をピストン１８で圧力Ｐ（２ｋｇｆ／Ｃ＋ａ以下
）により加圧し、注入管１７を経て内外金型８．９間の
空間１０に充填する。液状エラストマー材料１６として
は、製品にしたときの硬さがデュロメータＡ２０〜Ｄ８
０（好ましくはＪＩＳＡ７０〜１００）のものがよく、
例えばポリウレタンポリマーと硬化剤とが混合されたも
のが使用される。粘度は２０００〜４０００ｃｐｓ程度
に調製される。After heating the entire inner and outer molds 8.9 to the curing temperature of the elastomer, the liquid elastomer material 16 in the casting container 15 is pressurized with a pressure P (2 kgf/C+a or less) with the piston 18, and the injection pipe 17 is Then, the space 10 between the inner and outer molds 8.9 is filled. The liquid elastomer material 16 has a hardness of durometer A20 to D8 when made into a product.
0 (preferably JISA 70-100).
For example, a mixture of a polyurethane polymer and a curing agent is used. The viscosity is adjusted to about 2000 to 4000 cps.
空間１０にエラストマー材料１６を充填して行くと、そ
れが上１ＩＩＩの脱気孔１３から流出するので、その流
出した時点で脱気孔１３に開閉ネジ１４を螺着し、脱気
孔１３を密閉する。そして、この密閉後、ｌＯ〜３０ｋ
ｇｆ／ｃ＋１１の加圧成形によりエラストマー材料Ｉ６
を介して補強布４に圧力を加える。補強布４は緩衝層７
で目止めされており、エラストマー材料１６が浸透しな
いので、圧力によって緩衝層７と共に伸張しながら内金
型８外周の凹凸部１９の形状に沿って変形し、内金型８
の外周面に間隙なく確実に密着する。この加圧時にも、
補強布４の両端部を内金型８と上下Ｉ’１１．１２との
間で固定しているので、加圧によって補強布４が動いた
りずれたりすることはない。When the space 10 is filled with the elastomer material 16, it flows out from the deaeration hole 13 of the upper part 1III, and at the time it flows out, the opening/closing screw 14 is screwed into the deaeration hole 13 to seal the deaeration hole 13. After this sealing, lO~30k
Elastomer material I6 by pressure molding of gf/c+11
Pressure is applied to the reinforcing cloth 4 through. The reinforcing cloth 4 is the buffer layer 7
Since the elastomer material 16 does not penetrate, the inner mold 8 deforms along the shape of the uneven portion 19 on the outer periphery of the inner mold 8 while expanding together with the buffer layer 7 due to pressure.
Reliably adheres to the outer peripheral surface without any gaps. Even during this pressurization,
Since both ends of the reinforcing cloth 4 are fixed between the inner mold 8 and the upper and lower I'11, 12, the reinforcing cloth 4 will not move or shift due to pressure.
尚、補強布４および緩衝層７は、ベルトの加圧成形の際
、伸び率（伸び７元の長さ）を１．４（好ましくは０．
８）以下に止めるのがよい。変形量が過大になると補強
布等が破損し易くなり、また目止めが取れるおそれがあ
るからである。In addition, the reinforcing cloth 4 and the buffer layer 7 have an elongation rate (length of elongation 7 original) of 1.4 (preferably 0.01) during pressure forming of the belt.
8) It is best to stop at the following. This is because if the amount of deformation becomes too large, the reinforcing cloth etc. will be easily damaged and there is a risk that the seal will come off.
エラストマー材料１６が硬化すれば、上下蓋１１゜１２
を外し内外金型８，９を分離した後、成形品を脱型し、
その成形品を所定の製品幅に輪切りすることによって、
無端ベルト５を製造できる。Once the elastomer material 16 is cured, the upper and lower lids 11°12
After removing and separating the inner and outer molds 8 and 9, the molded product is demolded,
By slicing the molded product into a predetermined product width,
An endless belt 5 can be manufactured.
上記説明で、補強布の含浸処理方法の一例を示したが、
本発明はこれに限るものではなく、第７図に示すように
、１次浸漬処理により補強布にモジュラスの小さい軟質
のエラストマーＡ（例えば１００％モジュラスが１０〜
１５０ｋｇｆ／ｃｆｆｌのポリウレタン）を含浸させ、
更に２次浸漬処理により含浸された補強布の織糸４ａに
硬質のエラストマーＢ（例えば１００％モシュラスカ１
００〜３５０ｋｇｆ／ＣＴａ）ヲ被覆したものでもよい
。また、第８図に示すように、補強布の表面層に塗布処
理により硬質のエラストマーＢを含浸させ、緩衝層７側
の裏面層に塗布処理により軟化のエラストマーＡを含浸
させてもよい。かかる含浸処理を施せば、成形性を損う
ことなく物性を向上させることができる。更に、第８図
の場合、表面層に含浸させるエラストマーＢとして、摩
擦係数を下げる物質を含有したもの（例えばフッ素樹脂
やケイ素樹脂を含有したポリウレタン）や同物質により
変性したもの（例えばシリコーン変性ポリウレタン）を
使用することができる。これらのエラストマーは接着性
が悪いが、補強布の繊維中に埋入して強固に固定され、
摩擦係数の低下ひいてはベルト騒音の軽減に寄与するこ
とができる。尚、フッ素樹脂等を多量に含有させると耐
摩耗性を低下させるため、５０重量％以下に止めておく
のがよい。In the above explanation, an example of the method for impregnating reinforcing cloth was shown,
The present invention is not limited to this, but as shown in FIG.
Impregnated with 150kgf/cffl polyurethane),
Furthermore, a hard elastomer B (for example, 100% Moshuraska 1
00 to 350 kgf/CTa) may be coated. Alternatively, as shown in FIG. 8, the surface layer of the reinforcing cloth may be impregnated with a hard elastomer B by a coating process, and the back layer on the side of the buffer layer 7 may be impregnated with a softening elastomer A by a coating process. By performing such an impregnation treatment, physical properties can be improved without impairing moldability. Furthermore, in the case of Fig. 8, the elastomer B impregnated into the surface layer may contain a substance that lowers the coefficient of friction (for example, polyurethane containing fluororesin or silicone resin) or one modified with the same substance (for example, silicone-modified polyurethane). ) can be used. Although these elastomers have poor adhesion, they are embedded in the fibers of the reinforcing fabric and are firmly fixed.
This can contribute to lowering the coefficient of friction and thus reducing belt noise. Incidentally, if a large amount of fluororesin or the like is contained, the wear resistance will be reduced, so it is preferable to limit the content to 50% by weight or less.
また、無端ベルトの構造、形状は第１図のものに限定さ
れず、ベルト本体ｌの側面に補強布４を有するものであ
れば、その製造に広く採用できる。Further, the structure and shape of the endless belt are not limited to those shown in FIG. 1, and any belt having the reinforcing cloth 4 on the side surface of the belt body 1 can be widely adopted for its manufacture.
例えば、第９図はベルト本体１の内外周面に対称に歯部
３，２５を備えた対称型、第１Ｏ図は内外の歯部３．２
５が周方向にずれた非対称型の無端ベルト２６を夫々示
す。また、第１１図はベルト本体ｌの内周面に歯部３、
外周面に７字状の突条部２９を夫々一体形成した無端ベ
ルト３０を示す。これらの場合にも歯部３．２５及び突
条部２９の表面を補強布４，２７．３１でおおうように
している。For example, FIG. 9 shows a symmetrical type in which teeth 3, 25 are symmetrically provided on the inner and outer circumferential surfaces of the belt main body 1, and FIG. 1O shows inner and outer teeth 3.2.
5 indicates an asymmetric endless belt 26 that is shifted in the circumferential direction. In addition, FIG. 11 shows a toothed portion 3 on the inner circumferential surface of the belt main body l.
An endless belt 30 is shown in which 7-shaped protrusions 29 are integrally formed on the outer peripheral surface. In these cases as well, the surfaces of the tooth portions 3.25 and the protruding portions 29 are covered with reinforcing cloths 4, 27.31.
補強布４，２７．３１の表面に薄いシリコン、フッ素等
の合成樹脂又はエラストマーの層を設けることも可能で
ある。このようにすれば、補強布４，２７゜３１表面の
摩擦係数を任意に変えることができ、ベルトの利用分野
が広がる。It is also possible to provide a thin layer of silicone, fluorine or other synthetic resin or elastomer on the surface of the reinforcing cloth 4, 27, 31. In this way, the friction coefficient of the surface of the reinforcing cloth 4, 27.degree. 31 can be changed arbitrarily, and the field of use of the belt can be expanded.
次に具体的実施例を掲げて説明する。Next, specific examples will be listed and explained.
（１） ナイロン繊維の織布を補強布として用い、浸
漬処理により１００％モジュラス１５０ｋｇｆ／ｃｉの
ポリウレタンを含浸させた。浸漬用処理液の粘度は３０
００ ｃｐｓとした。(1) A nylon fiber woven fabric was used as a reinforcing fabric and impregnated with polyurethane having a 100% modulus of 150 kgf/ci by dipping treatment. The viscosity of the immersion treatment liquid is 30
00 cps.
（２）実施例１として、含浸処理した補強布の裏面に厚
さ０．４１１１１１１のポリウレタンシート（硬さＪＩ
ＳＡ８５）を１２０°Ｃで熱圧着し目止め処理を兼ねて
緩衝層を形成した。このとき、従来例として、実施例と
同様の補強布で含浸処理をしていないものに対しても同
様にして緩衝層を形成した。(2) As Example 1, a polyurethane sheet with a thickness of 0.4111111 (hardness JI
SA85) was thermocompression bonded at 120°C to form a buffer layer that also served as a sealing treatment. At this time, as a conventional example, a buffer layer was formed in the same manner on a reinforcing cloth similar to that of the example but not subjected to the impregnation treatment.
また、実施例２として、表面層および裏面層の各厚さ０
．３ｍｍの２層ポリウレタンシート（表面層の軟化温度
１００°Ｃ，裏面層の軟化温度１５０’Ｃ）の表面層が
前記含浸処理した補強布の裏面に当接するように配して
１２０°Ｃで熱圧着し、緩衝層を形成した。In addition, as Example 2, each thickness of the front layer and the back layer is 0.
．． A 3 mm two-layer polyurethane sheet (softening temperature of the surface layer: 100°C, softening temperature of the back layer: 150°C) was placed so that the surface layer was in contact with the back side of the impregnated reinforcing fabric, and heated at 120°C. This was then crimped to form a buffer layer.
（３）実施例１，２および従来例の緩衝層を有する補強
布を筒状にエンドレス加工した後、第３図〜第５図のよ
うに、内金型に装着し、その外側から芳香族ポリアミド
の繊維ロープを螺旋状に巻着した後、外金型に挿入して
成形用金型を構成した。(3) After processing the reinforcing fabrics having the buffer layer of Examples 1 and 2 and the conventional example into an endless tube shape, as shown in Figs. A polyamide fiber rope was wound spirally and then inserted into an outer mold to form a molding mold.
該金型を約１１０″Ｃに加熱した後、硬化後の硬さがＪ
ＩＳＡ８５となる注型用液状ポリウレタン（硬化剤を含
む。粘度２０００〜４０００ｃｐｓ）を注型し、密閉後
、１１０°Ｃ１２Ｃ１２Ｏ／ｃｆｆｌの成形条件で加圧
成形し、この状態で６０分間保持した。After heating the mold to about 110"C, the hardness after hardening is J
A liquid polyurethane for casting (contains a curing agent, viscosity 2000 to 4000 cps) having an ISA85 was poured into a mold, and after sealing, pressure molding was performed under molding conditions of 110° C. 12 C12 O/cffl, and the mold was held in this state for 60 minutes.
成形完了後、成形品を脱型し、所定幅に裁断し、歯付無
端ベルトを得た。After the molding was completed, the molded product was demolded and cut into a predetermined width to obtain a toothed endless belt.
（４）実施例１，２および従来例のベルトを用いて下記
の要領でベルト性能を調べた。(4) Using the belts of Examples 1 and 2 and the conventional example, belt performance was investigated in the following manner.
■ 摩擦係数μの測定
ベルトより一定長さの試料片を採取し、鋼板（材質ＳＳ
４Ｌ表面粗さＲｍａｘ ２５ Ｓ）に歯部表面が接当
するように載置し、ベルト片に一定の荷重Ｗ＠かけて引
張り、１ｃｍ／秒の速度で移動させるときに要する力Ｆ
を求め、μ＝Ｆ／Ｗを求めた。■ Measurement of friction coefficient μ A sample piece of a certain length was taken from the belt, and a steel plate (material SS
4L Surface roughness Rmax 25 S) The force F required when placing the belt piece so that the tooth surface is in contact with it, applying a constant load W@ to the belt piece, pulling it, and moving it at a speed of 1 cm/sec.
was calculated, and μ=F/W was calculated.
■ 耐摩耗性評価
一対の駆動側ブーりと負荷側ブーりとに標準取付張力を
与えてベルトを架は渡し、一定の負荷（ブレーキ）をか
けて駆動プーリを３００゜ｒｐｍ （ベルト周速２．
６ｍ／秒）で回転し、−定時間経過後、ベルトの重量を
測り、当初との差（減量）を求め、評価基準とした。以
下の試験についても該ベルト試験機を用いた。■ Abrasion resistance evaluation Apply standard mounting tension to a pair of drive-side and load-side boots, pass the belt across the rack, apply a constant load (brake), and rotate the drive pulley at 300° rpm (belt circumferential speed 2). ．．
The belt was rotated at a speed of 6 m/sec), and after a certain period of time had elapsed, the weight of the belt was measured, and the difference (weight loss) from the initial weight was determined, which was used as an evaluation standard. The belt testing machine was also used for the following tests.
■ ジャンピングトルクの測定
ベルト張力を標準取付張力の１／２としてベルトを走行
させ、負荷を変化させてジャンピングする直前の伝達ト
ルク（ジャンピングトルク）を測定した。■Measurement of Jumping Torque The belt was run with the belt tension set to 1/2 of the standard installation tension, and the transmitted torque (jumping torque) immediately before jumping was measured while changing the load.
■ 最大伝達トルクの測定
標準取付張力を与えてベルトを走行させ、負荷を変化さ
せて伝達可能な最大トルクを測定した。■ Measurement of maximum transmittable torque The belt was run with standard mounting tension applied, and the maximum transmittable torque was measured by varying the load.
■ 耐久性評価
標準取付張力を与え、ジャンピングトルク近くの負荷で
ベルトを一定時間走行させた後、ベルト歯部の摩耗によ
る損傷（欠損）状態を調べ、これを評価基準とした。■Durability evaluation After applying standard mounting tension and running the belt for a certain period of time under a load close to jumping torque, the state of damage (missing) caused by wear on the belt teeth was examined, and this was used as the evaluation standard.
■ 騒音の測定
標準取付張力を与え、一定負荷でベルトを走行させ、ベ
ルト走行面に対向して、該走行面より３０ｃｍ離した位
置に騒音計を設け、走行時の騒音を測定した。(2) Measurement of Noise The belt was run under a constant load with a standard mounting tension applied, and a sound level meter was placed opposite the belt running surface and 30 cm away from the running surface to measure the noise during running.
（５）測定結果を第１表に示す。同表の数字は、実施例
１のベルトを基準（指数１００）として、指数表示した
ものである。(5) The measurement results are shown in Table 1. The numbers in the table are expressed as an index, using the belt of Example 1 as a reference (index 100).
第１表
第１表により、実施例１および２は従来例に比べて摩擦
係数が上昇し、その結果騒音については２倍程度に増大
したが、耐摩耗性、耐久性については１０倍以上と飛躍
的な向上が図られた。Table 1 According to Table 1, the coefficient of friction of Examples 1 and 2 increased compared to the conventional example, and as a result, the noise increased approximately twice, but the wear resistance and durability increased by more than 10 times. A dramatic improvement was achieved.
また、実施例においても、２層シート材により緩衝層を
形成した実施例２は実施例１に比べて耐摩耗性および耐
久性の向上が顕著である。Further, in the examples, Example 2 in which the buffer layer was formed from a two-layer sheet material has a remarkable improvement in abrasion resistance and durability compared to Example 1.
（発明の効果）
以上説明した通り、本発明の歯付無端ベルトの製造方法
は、補強布に接着性および耐久性向上のためのエラスト
マーを含浸したので、目止め処理と共に緩衝層を形成す
るためのシート材との熱接着性が良好となり、騒音がや
や増大するものの、従来のベルトに比べて耐久性が１０
倍以上と飛躍的に向上させることができた。(Effects of the Invention) As explained above, in the method for manufacturing the toothed endless belt of the present invention, since the reinforcing cloth is impregnated with an elastomer for improving adhesiveness and durability, it is possible to form a buffer layer in addition to sealing treatment. Although the thermal adhesion with the sheet material is good, and the noise is slightly increased, the durability is 10% higher than that of conventional belts.
We were able to dramatically improve this by more than doubling it.
また、シート材として２Ｎ構造のものを使用し、低軟化
点エラストマーで形成した表面層を補強布側として低軟
化点以上高軟化点未満の温度で熱圧着することにより、
シート材表面層を含浸処理された補強布の織目に埋入さ
せることができ、接着性の向上と補強布の含浸率の向上
とが相まって耐久性を大幅に向上させることができる。In addition, by using a sheet material with a 2N structure and bonding the surface layer made of a low softening point elastomer as the reinforcing fabric side at a temperature above the low softening point and below the high softening point,
The surface layer of the sheet material can be embedded in the weave of the impregnated reinforcing fabric, and the combination of improved adhesiveness and improved impregnation rate of the reinforcing fabric can significantly improve durability.
第１図は本発明の実施例を示すベルト斜視図、第２図は
同ベルトの断面図、第３図は同金型装置の断面図、第４
図は同金型の要部断面図、第５図は同断面平面図、第６
図は補強布とシート材との熱圧着状態を示す説明図、第
７図は１次および２次浸漬処理により含浸処理された補
強布の織糸の拡大横断面図、第８図は表面層および裏面
層に異なった含浸処理がなされた補強布の部分断面図、
第９図〜第１１図は他の実施例を示すベルトの斜視図で
ある。
１・・・ベルト本体、２・・・ランド部、３，２５・・
・歯部、４．２７．３１・・・補強布、５．２６．３０
・・・無端ベルト、６・・・抗張体、７・・・緩衝層、
８・・・内金型、９・・・外金型、１０・・・空間、１
１・・・上蓋、１２・・・下蓋、１６・・・液状注型材
料、１９・・・凹凸部、２０・・・シート材。Fig. 1 is a perspective view of a belt showing an embodiment of the present invention, Fig. 2 is a sectional view of the belt, Fig. 3 is a sectional view of the mold device, and Fig. 4 is a sectional view of the same belt.
The figure is a cross-sectional view of the main part of the mold, Figure 5 is a plan view of the same cross-section, and Figure 6 is a cross-sectional view of the same mold.
The figure is an explanatory diagram showing the state of thermocompression bonding between the reinforcing fabric and the sheet material, Fig. 7 is an enlarged cross-sectional view of the woven yarn of the reinforcing fabric impregnated by the primary and secondary dipping treatments, and Fig. 8 is the surface layer. and partial cross-sectional views of reinforcing fabrics with different impregnation treatments on the back layer,
9 to 11 are perspective views of belts showing other embodiments. 1... Belt body, 2... Land portion, 3, 25...
・Tooth part, 4.27.31... Reinforcement cloth, 5.26.30
... Endless belt, 6 ... Tensile body, 7 ... Buffer layer,
8...Inner mold, 9...Outer mold, 10...Space, 1
DESCRIPTION OF SYMBOLS 1... Upper lid, 12... Lower lid, 16... Liquid casting material, 19... Uneven part, 20... Sheet material.
Claims (2)
、歯部（３）、（２５）、（２９）形成用凹凸部が形成
された金型に不浸透性エラストマーにより形成された緩
衝層（７）を有する伸長可能な補強布（４）、（２７）
、（３１）を装着し、該補強布（４）、（２７）、（３
１）と他の金型との間に抗張体（６）を装着した後、内
外金型（８）、（９）間の空間（１０）に液状注型用エ
ラストマー（１６）を注入し、該エラストマー（１６）
を加圧することにより補強布（４）、（２７）、（３１
）を伸長させて金型の凹凸部に沿て成形すると共に該エ
ラストマー（１６）を固化する歯付無端ベルトの製造方
法において、 補強布（４）、（２７）、（３１）に予め耐久性および
接着性向上のためのエラストマーを含浸し、含浸された
補強布（４）、（２７）、（３１）に不浸透性エラスト
マーによって形成されたシート材（２０）を熱圧着して
緩衝層（７）を形成することを特徴とする歯付無端ベル
トの製造方法。(1) Among the inner and outer molds (8) and (9) arranged concentrically, impermeable elastomer is used in the molds in which the tooth parts (3), (25), and (29) forming uneven parts are formed. stretchable reinforcing fabric (4), (27) with a buffer layer (7) formed by
, (31), and the reinforcing fabrics (4), (27), (3
After installing a tensile body (6) between 1) and another mold, a liquid casting elastomer (16) is injected into the space (10) between the inner and outer molds (8) and (9). , the elastomer (16)
By applying pressure to the reinforcing fabrics (4), (27), (31
) is stretched and molded along the irregularities of a mold, and at the same time the elastomer (16) is solidified. The sheet material (20) made of impermeable elastomer is impregnated with an elastomer to improve adhesion, and the impregnated reinforcing fabric (4), (27), (31) is thermocompressed to form a buffer layer ( 7) A method for manufacturing a toothed endless belt.
された表面層と高軟化点エラストマーで形成された裏面
層とが接合一体化されており、表面層を補強布側として
低軟化点以上高軟化点未満の温度で熱圧着する請求項（
１）記載の歯付無端ベルトの製造方法。(2) The sheet material (20) has a surface layer formed of a low softening point elastomer and a back layer formed of a high softening point elastomer, which are integrally bonded together, with the surface layer facing the reinforcing fabric and having a low softening point or higher. Claims for thermocompression bonding at a temperature below the high softening point (
1) The method for manufacturing the toothed endless belt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63324320A JPH0722976B2 (en) | 1988-12-21 | 1988-12-21 | Toothed endless belt manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63324320A JPH0722976B2 (en) | 1988-12-21 | 1988-12-21 | Toothed endless belt manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02167731A true JPH02167731A (en) | 1990-06-28 |
| JPH0722976B2 JPH0722976B2 (en) | 1995-03-15 |
Family
ID=18164475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63324320A Expired - Lifetime JPH0722976B2 (en) | 1988-12-21 | 1988-12-21 | Toothed endless belt manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0722976B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191539A (en) * | 2017-07-05 | 2017-09-22 | 浙江奥力孚胶带有限公司 | A kind of overlength seamless polyurethane synchronous belt and its production equipment and preparation method |
-
1988
- 1988-12-21 JP JP63324320A patent/JPH0722976B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191539A (en) * | 2017-07-05 | 2017-09-22 | 浙江奥力孚胶带有限公司 | A kind of overlength seamless polyurethane synchronous belt and its production equipment and preparation method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0722976B2 (en) | 1995-03-15 |
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