JP3851297B2 - Tubular product manufacturing apparatus, manufacturing method, and tubular product - Google Patents

Tubular product manufacturing apparatus, manufacturing method, and tubular product Download PDF

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JP3851297B2
JP3851297B2 JP2003207304A JP2003207304A JP3851297B2 JP 3851297 B2 JP3851297 B2 JP 3851297B2 JP 2003207304 A JP2003207304 A JP 2003207304A JP 2003207304 A JP2003207304 A JP 2003207304A JP 3851297 B2 JP3851297 B2 JP 3851297B2
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mold
nozzle
peripheral surface
outer peripheral
discharge port
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JP2005059225A (en
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敏生 鎌田
克美 寺川
純 西林
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Sumitomo Rubber Industries Ltd
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Sumitomo Rubber Industries Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、樹脂又はゴム製の管状物の製造装置、製造方法および管状物に関し、詳しくは、円筒状の金型の外周面に液状とした樹脂又はゴムを塗布し、該塗布材を硬化後に離型して管状物を製造するもので、製造された管状物は画像形成装置の中間転写ベルト等に好適に用いられるものである。
【0002】
【従来の技術】
従来、樹脂又はゴム製の管状物は、複写機、プリンタ、ファクシミリ等の電子写真方式等の画像形成装置の中間転写ベルト、その他、各種ベルト等として種々の分野で用いられている。
画像形成装置の中間転写ベルト等として用いる場合には、所望の性能を発現するために、耐熱性に優れると共に、均一な厚みを有することが要求されており、従来、均一な厚みの管状体を得るための種々の提案がなされている。
【0003】
例えば、特開平9−85756号公報(特許文献1)では、芯体を回転させながら、芯体の外面もしくは内面に、25℃での粘度が10〜1500ポイズの液状の耐熱樹脂をディスペンサーにより連続的に供給し、かつ、ディスペンサーの供給部を芯体の回転軸線方向に移動させることにより、供給した液状の耐熱樹脂をらせん状に巻き回して塗布層を形成させる管状物の製造方法が提案されている。
【0004】
【特許文献1】
特開平9−85756号公報
【0005】
【発明が解決しようとする課題】
しかしながら、特許文献1の製法では、ノズルの先端部が金型の外周面に正確に追従せず、塗布の途中にノズルと金型との間に微小な隙間ができると、エアー咬みが発生し、塗布面に凹凸ができやすい問題がある。この隙間を発生させないためにノズルの押し付け力を大きくすると塗布済みの材料がノズル先端で削られて塗布不良となり、成形される管状物の厚みが均一化されない。そのため、均一な塗布厚みを得るためには、金型とディスペンサーの走査方向の並行度調節が必須となるが、自動化は設備の大型化やコスト面で問題が生じる。
【0006】
本発明は上記した問題に鑑みてなされたものであり、金型の外周面にノズルの吐出口を追従させ、均一な厚みの樹脂又はゴム製の管状物を容易に製造することを課題としている。
【0007】
【課題を解決するための手段】
上記課題を解決するため、本発明は、第一に、回転される金型外周面にディスペンサーのノズルを当接させ、該金型軸線方向に移動させながら液状で耐熱性を有する樹脂又はゴムを上記ノズルより連続的に塗布し、上記樹脂又はゴムを硬化させた後に上記金型から離型する樹脂製又はゴム製の管状物の製造装置であって、
上記金型は軸線方向を水平として配置される円筒状物からなり、該金型の下向き回転方向の外周面に、上記ノズルの先端に所定角度で傾斜させたテーパ状吐出口を配置し、
上記テーパ状吐出口の傾斜基部側を上記金型の外周面へ当接する当接位置とすると共に先端側の鋭角部を金型の外周型面に当接させずに隙間形成側とし、該ノズルと上記金型とは上記テーパ状吐出口の当接側を金型回転方向の前側とすると共に隙間形成側を回転方向の後側として配置し、
上記当接位置と上記金型断面の中心を結ぶ線分が水平線となす塗工角度θを40〜85度の範囲に設定し、かつ、上記ノズルのテーパ状吐出口の下部側となる上記傾斜基部と上記金型の外周面とがなす隙間形成角度δを、0度<δ≦30度とし、
かつ、上記金型外周面に沿って追従可能に上記ノズルを所要圧で押し付けるスプリング手段を備えていることを特徴とする管状物の製造装置を提供している。
【0008】
上記構成によれば、スプリング手段により金型の外周面に対するノズルの押付力を均等に保持しながら追従させることができ、金型とディスペンサーの走査方向の並行度に微小なズレがあっても、ノズルを自動的に追従させ所要圧力で押し付けているため、塗布厚さをムラを生じさせずに均一とでき、製造される管状物の精度を高めることができる。
また、金型外周面に接触させるノズルの吐出口をテーパ状としているため、金型回転方向の前側で当接させて液状樹脂やゴムからなる液状原料を金型外周面に確実に塗布できると共に、吐出口の金型回転方向の後側では金型外周面との間に当接させずに隙間をあけているため、塗布された液状原料を吐出口のエッジで掻き落とすことはない。上記吐出口のテーパ角度は45度程度であるが、後述する金型外周面に対するノズルの配置角度によって吐出口のテーパ角度を変えてもよく、30〜80度の範囲が好ましい。
なお、 上記ノズルを金型軸線方向に移動させるとは、 金型を所定位置で回転させると共にノズルを金型の軸線方向に移動させる場合と、 ノズルを固定すると共に金型を回転させながら移動させる場合を含む。
【0010】
詳しくは、上記軸線方向を水平として配置する金型の上半周側で、下向き回転面の側方にノズルを配置し、上記ノズルの押し付け位置は金型の下向き回転側位置とし、上記ノズルの吐出口下部を金型外周面に押し付ける当接側、上部の鋭角突出部は金型外周面との間に隙間をあけている。
上記金型外周面に対して側方に配置するノズルは、上記したように、金型の断面方向において、ノズルの金型への押付位置と金型の中心位置とを結ぶ線分が、水平面となす塗工角度θを、40度≦θ≦85度としているのは、40度より小さいと、吐出口が金型外周面に沿う部分が少なくなるため、塗布材料を金型外周面に沿って塗布しにくくなる。一方、85度より大きいと、金型とディスペンサーの走査方向の並行度に狂いがある場合、ノズルの追従ができなくなる恐れがあるためである。
【0011】
また、ノズルのテーパ状吐出口の回転方向前方の下部側となる上記傾斜基部と上記金型の外周面とがなす隙間形成角度δを、0度<δ≦30度としているのは、0度とすると隙間がなくなり、塗布材と接触してかき落とす恐れがある一方、30度を越えると隙間が大きくなり過ぎて、空気を巻き込みながら塗布されてしまうからである。
【0012】
上記ノズルの吐出口を金型外周面に押し付ける上記スプリング手段は、上記液状の樹脂又はゴムからなる原料を所定圧力で供給する供給管と上記ノズルとの間にエルボ金具を介設し、該エルボ金具から伝動板を突設する一方、上記原料供給管より上下一対の挟持板を突設し、これら挟持板に対向してスプリングプランジャーを取り付け、この上下スプリングプランジャーの間に上記伝動板を挟み込んだ構成とし、
上記スプリング手段により上記金型とディスペンサー走査方向の並行度に応じて上記ノズルを金型外周面に近接離反させて所定押付圧で追従できる構成としている。
【0013】
上記のようにスプリング手段として、ノズルと連動される伝動板を、対向するスプリングプランジャーのピストンの間に挟み込む構成としているため、伝動板の原状位置は両側のスプリングプランジャーのバネ圧が同一の中立位置となる。よって、塗装開始時には、金型外周面に対するノズル吐出口の押し付け位置を上記中立位置で設定しておくと、その後、両側のスプリングプランジャーのバネ圧の相関関係で、ノズルが金型外周面に追従できるように自動制御される。このように、一対のスプリングプランジャーをスプリング手段として用いることで、数mmの並行度のずれに対してもノズルを正確に追従させることが可能となる。
【0014】
本発明は、第二に、管状物の製造方法を提供している。該製造方法は、軸線方向を水平として配置される円筒状物からなる金型を回転させ、その外周面に、ディスペンサーのノズルを当接させて上記金型の軸線方向に移動させながら、上記ノズルより液状の耐熱性を有する樹脂又はゴムを吐出させて連続的に塗布し、
上記樹脂又はゴムを硬化させた後に上記金型から離型する樹脂製又はゴム製の管状物の製造方法であって、
上記金型の下向き回転方向の外周面に、上記ノズルの先端に所定角度で傾斜させたテーパ状吐出口を配置し、
上記ノズルを上記金型の外周面に対して側方よりスプリング手段により所要圧力で押し付けて上記金型外周面に追従させ、
かつ、上記テーパ状吐出口の傾斜基部側を上記金型の外周面へ当接する当接位置とすると共に先端側の鋭角部を金型の外周型面に当接させずに隙間を形成し、該ノズルと上記金型とは上記テーパ状吐出口の当接側を金型回転方向の前側とすると共に隙間形成側を回転方向の後側とし
上記当接位置と上記金型断面の中心を結ぶ線分が水平線となす塗工角度θを40〜85度の範囲に設定し、かつ、上記ノズルのテーパ状吐出口の下部側となる上記傾斜基部と上記金型の外周面とがなす隙間形成角度δを、0度<δ≦30度として、塗布された上記樹脂またはゴムを掻き落さないようにして塗装厚みを均等にしていることを特徴としている。
【0015】
上記製造方法は、前記した製造装置を用いて製造する方法であってもよいが、必ずしも前記製造方法による必要はない。
上記製造方法によれば、金型とディスペンサー走査方向に微小なズレがあっても、スプリング手段でノズルを自動的に追従させることでき、塗布量の均一化を図ることができる。且つ、ノズルの吐出口は塗布された材料をノズルのエッジで掻き落とすことが無いようにしているため、塗布面に凹凸やムラを発生させず、均一な厚みの管状物を製造することができる。
【0016】
前記製造装置により製造され、あるいは前記方法で製造される管状物は、画像形成装置の中間転写ベルトあるいは転写ベルトとして好適に用いられるものである
即ち、本発明の製造装置あるいは製造方法により得られる管状物は、均一な厚みを有する寸法精度の高いシームレスなベルト状となっている。よって、画像形成装置等の中間転写ベルト、転写ベルト等として好適に用いることができる。管状物の厚みは、例えば、中間転写ベルトの場合、50μm〜200μmとするのが良い。本製造方法によれば30μm〜300μm程度の厚みの管状物を均一な厚みで得ることができる。
【0017】
耐熱性の樹脂としては、ポリイミド樹脂、ポリアミドイミド樹脂が好適に用いられる。その他、ポリエーテルイミド樹脂、エポキシ樹脂、ポリベンズイミダゾール樹脂、ポリベンズオキサゾール樹脂、ポリフェニレンスルフィド樹脂、ポリエーテルケトン樹脂、ポリエーテルスルホン樹脂、ポリサルフォン樹脂、ポリアリレート樹脂、フッ素樹脂等が挙げられ、前駆体溶液として塗布されるのが好ましい。中でも、高弾性率、加工性の点でポリアミドイミド樹脂、ポリイミド樹脂が好ましい。
耐熱性のゴムとしては、シリコーンゴム、ウレタンゴム等が挙げられる。
また、耐熱性の樹脂又はゴムには無機系フィラー等の各種添加剤を配合しても良く、分散剤、溶剤、粘度調整剤等を加えることもできる。なお、液状で耐熱性の樹脂又はゴムは粘度が0.1Pa・s〜20Pa・sの状態で、10℃〜50℃で塗布されるのが好ましい。
【0018】
樹脂又はゴムの硬化は、少なくとも管状物が自己支持性を有する程度まで、樹脂又はゴムが塗布された金型を回転させながら加熱する必要があり、加熱温度は130℃以上が好ましく、樹脂の場合、最終硬化させるには200℃〜350℃程度の非常に高温まで加熱する必要がある。また、加熱時間は1時間〜5時間、さらには1.5時間〜3時間が好ましい。
【0019】
金型の材質としては、アルミニウム、鉄等の種々の金属を用いることができ、管状物をより脱型しやすくするために、金型の外周面に離型処理が施されていても良い。離型処理としては、従来公知の金型表面処理を施すことができ、離型処理に用いる離型剤としては、フッ素系あるいはシリコーン系等の離型剤が好ましく、特に焼き付けタイプのものが好ましい。また、アルミナ、シリカ、ジルコニア、窒化アルミニウム等のセラミックスコーティングが施されても良い。
【0020】
硬化させた樹脂又はゴムの脱型は管状物や金型の冷却後が好ましい。これにより金型から管状物を容易に脱型することができ、管状物の寸法精度や性能に影響を及ぼすことなく管状物を良好な状態で取り外すことができる。
【0021】
また、本発明の管状物の内周面側あるいは/及び外周面側に1層以上の樹脂、ゴム、エラストマー等からなる層、あるいは金属層等を設けて、2層あるいは3層以上等の複層構造として用いることもできる。なお、ローラ等の円柱状の基材の外周面に本発明の管状物を被覆して用いることもできる。
【0022】
【発明の実施の形態】
以下、本発明の実施形態を図面を参照して説明する。
図1乃至図3は、本発明の樹脂製管状物の製造装置10を示す。
上記製造装置10は、軸線方向を水平として配置されると共に回転手段により図中の矢印A方向に回転される円筒状の金型11と、該金型11の外周面11aに液状で耐熱性を有する樹脂又はゴムを主成分とする原料を連続的に供給するデイスペンサー12とを備え、該デイスペンサー12は金型11の側方で軸線方向に沿って移動手段(図示せず)により移動される。
【0023】
デイスペンサー12は原料供給管15とノズル13との間にL字形状のエルボ金具21を介設し、かつ、原料供給管15に取り付けたスプリング手段20でエルボ金具21より突設した伝動板21Aを挟持する構成とし、スプリング手段20でノズル13を金型11の外周面11aに沿って自動追従可能な構成としている。
【0024】
2に示すように、ノズル13の噴射口側に断面矩形筒とした小径筒部13aを設け、その先端をテーパ状吐出口13bとしている。該吐出口13bは傾斜基部13b−1側を金型11の外周面11aへの当接側とすると共に先端側の鋭角部13b−2を金型11の外周面11aに当接させずに隙間形成側としている。本実施形態では、ノズル13の軸線方向に対してノズル13のテーパ状吐出口13bがなす吐出口のテーパ角度を45度としている。
ノズル13と金型11とはテーパ状吐出口13bの傾斜基部13b−1側である当接側を金型回転方向Aの前側とすると共にテーパ状吐出口13bの鋭角部13b−2側である隙間形成側を回転方向Aの後側として配置している。
【0025】
具体的には、図2(B)に示すように、金型11の下向き回転方向の上半周面にノズル13の吐出口13の傾斜基部13b−1を当接させており、本実施形態では、当接位置Pと金型断面の中心Oを結ぶ線分が水平線となす塗工角度θを50度に設定している。
かつ、図2(C)に示すように、金型11の軸線方向においてノズル13を傾斜させ、ノズル13の移動方向である原料の塗工方向(図中矢印B)とは反対側のノズル13の鋭角部13b−3を金型11の外周面11aに当接させない状態としている。本実施形態では、金型11の軸線方向において、ノズル13のテーパ状吐出口13bの下部側となる傾斜基部13b−1の端面と金型11の外周面11aとがなす隙間形成角度δを10度としている。
【0026】
図3(A)〜(G)に示すように、上記スプリング手段20は、エルボ金具21から伝動板21Aを突設する一方、原料供給管15に押付力調整具22の一端をボルト止め固定し、他端より突出する一対の挟持板22a、22b先端に対向させてスプリングプランジャー23(23A、23B)を取り付け、この上下スプリングプランジャー23の間に上記伝動板21Aを挟み込んでいる。
スプリングプランジャー23は、シリンダの内部にコイルバネ23aと、該コイルバネ23aに付勢されてシリンダより突出/退没するセンターピン23bを備えている。
このようにスプリングプランジャー23A、23Bのバネ圧によりエルボ金具21を傾動可能とし、このエルボ金具21の動きと連動するノズル13の動きを吸収し、金型11の外周面11aに対するノズル13の押し付け力を所要圧に自動制御できる構成としている。
【0027】
次ぎに、上記装置による管状物の製造方法を説明する。
まず、導電性を付与するためにカーボンブラック等を添加した耐熱性樹脂の前駆体溶液からなる塗布原料を予め調整しておく。耐熱性樹脂としては、ポリアミドイミド樹脂を用いている。
金型11を図中矢印A方向に回転させ、かつ、ディスペンサー12を金型11の軸線方向(図中矢印B方向)に移動させて、該デイスペンサー12に供給される原料をノズル13より金型11の外周面11aに連続的に塗布している。
【0028】
この時、金型11の外周面11aに対するノズル13の押し付け力は、運転開始時、スプリング手段20の上下一対のスプリングプランジャー23の中立位置で規定して所要圧に制御している。また、スプリング手段20により所要圧に制御して、金型11の外周面11aに対して斜め方向からノズル13のテーパ状吐出口13を金型11の外周面11aに当接させている。
詳細には、テーパ状吐出口13の金型回転方向Aの前部側を金型11の外周面11aに当接させて塗装する一方、テーパ状吐出口13の金型回転方向Aの後部側は金型11の外周面11aとの間に隙間をあけている。
【0029】
上記原料の塗布時において、スプリング手段20によりノズル13の押し付け力を所要圧とし、かつ、伝動板21を上下のスプリングプランジャー23のセンターピン23bの間に挟んで上下方向(金型に対して近接離反方向)に移動可としているため、金型とディスペンサー走査方向の並行度に微小なズレがあっても、精度良くノズル13のテーパ状吐出口13bを金型11の外周面11aに自動的に追従させることができる。よって、塗布厚さにムラを生じさせず均一にすることができる。
【0030】
また、ノズル13の吐出口をテーパ状吐出口13bとし、その回転方向後方側では金型外周面11aとの間に隙間をあけているため、金型外周面11aに塗布し塗布材を、テーパ状吐出口13bの回転遅れ側(回転方法後方側)のエッジで削ることや、塗布済みの塗布材をテーパ状吐出口13bのエッジで削りとることもないため、塗布不良や厚み不良が生じることもない。
よって、原料を外周面11aの全体に渡って均一に、厚みムラなく塗布することができ、厚みバラツキが±3μm以下とされる均一な厚みの管状物30を容易に得ることができる。
【0031】
上記方法により金型11の外周面11a上に塗布された耐熱性樹脂の前駆体溶液からなる原料を、150℃で1時間、次いで300℃で3時間、金型11を回転しながら加熱して硬化する。この時、前駆体溶液の耐熱性樹脂は完全にイミド化している。このように前駆体溶液を硬化させて管状物30を成形した後、常温まで冷却後、管状物30を金型11から離型する。
【0032】
図4(A)に示すように、上記方法で得られた管状物30は、例えば、図4(B)に示すように、複層構造の中間転写ベルト40の剛性層として用いることができる。中間転写ベルト40は、本発明の管状物30を基材とした剛性層と、弾性層41と、表面コーティング層42とを備える複層構造とすることもできる。なお、管状物30のみで中間転写ベルトとして用いることもできる。その他、画像形成装置の転写ベルト等として好適に用いることができる。
【0033】
なお、上記実施形態ではノズル側を移動させているが、ノズル側は固定すると共に金型側を回転させながら軸線方向に移動させて塗布を行っても良い。
【0034】
以下、本発明の樹脂又はゴム製管状物の製造方法の実施例、比較例について詳述する。
【0035】
(実施例1)
上記実施形態と同様の方法でポリアミドイミドの前駆体溶液を塗布して管状物を作製した。ノズルにハイトゲージを取り付け、金型の外周面上の塗布開始位置から終了位置までの400mm長さを走査して振れを計測したところ200μmであり、金型の外周面の1ヵ所での回転振れを計測すると楕円回転(偏芯回転)をしており、その振れである振幅幅は80μmであった。
スプリング手段によりノズルの押し付け力を所要圧としたため自動的にノズルは金型の外周面に追従し、塗布途中にノズルの位置調整は行わなかった。塗布終了後、塗布済み金型を回転させながら加熱し、樹脂が硬化してから脱型し管状物(内径180mm、長さ400mm、厚み100μm)を得た。管状物に凹凸や筋ムラがなく、厚みバラツキは±1μmであった。
【0036】
(比較例1)
スプリング手段を取り付けずに、ノズルが金型の外周面に自動的に追従しない状態で塗布し、管状物を得た。塗布状況に応じて、その都度、塗布途中にノズル位置を調整しながら塗布した。その他は、実施例1と同様とした。
管状物に凹凸や筋ムラがないものの、厚みバラツキは±4μmであった。
【0037】
(比較例2)
スプリング手段を取り付けずに、ノズルが金型の外周面に自動的に追従しない状態で塗布し、管状物を得た。かつ、塗布途中にノズル位置の調整も行わなかったその他は、実施例1と同様とした。
塗布途中に塗布済み材料がノズルで削られ筋状に残り、厚みバラツキは±13μmであった。
【0038】
以上のように、実施例1は、自動的にノズルのテーパ状吐出口が金型の外周面の微小な変化に追従するため、均一な厚みの管状物が得られた。一方、比較例1は、塗布途中に塗布状況に応じてノズルの吐出口の位置を、その都度変更する必要がある上に、ノズルの吐出口の位置を調整しても厚みのバラツキは±4μmであり、実施例1よりもばらつきが大きかった。また、比較例2は、ノズル位置の調整を行わなかったため。厚みバラツキが±13μmと非常に大きかった。
【0039】
【発明の効果】
以上の説明より明らかなように、本発明によれば、スプリング手段により金型の外周面に対してノズルを所要圧で押し付け、回転される金型の外周面にノズルのテーパ状吐出口を自動的に追従させているため、塗布途中のノズルの吐出口の位置調整が不要であり、ノズルと金型との当接を常に所望の状態に保持することができる。
【0040】
また、ノズルの吐出口をテーパ状吐出口として、金型回転方向の後端側では吐出口と金型外周面との間に隙間をあけて、吐出口のエッジで塗布材を削らないようにしているため、塗布不良や厚み不良が生じることもなく、自動的に均一な厚みで樹脂又はゴムを塗布することができる。よって、ノズルと金型の外周面の並行度に微小ずれがある場合でも、均一な厚みの樹脂又はゴム製の管状物を容易に製造することができる。
【0041】
上記方法で製造された本発明管状物は、耐熱性に優れる上に、寸法精度も良く、傷や破れもなく均一な厚みを有しているため、複写機、ファクシミリ、プリンター等の画像形成装置に用いられる中間転写ベルト、転写ベルト等として好適に用いることができる。
【図面の簡単な説明】
【図1】 (A)(B)は、ノズルと金型の関係の概略図である。
【図2】 (A)(B)はノズルと金型の外周面との当接位置の説明図、(C)は塗工方向とノズルの傾きの関係を示す図、(D)は塗布状況を示す図である。
【図3】 スプリング手段の部品構成の説明図であり、(A)〜(C)はノズル、スプリングプランジャー、エルボ金具の関係を示す図であり、(D)〜(F)はノズルの構成図、(G)はスプリングプランジャーの構成図である。
【図4】 (A)は本発明の樹脂又はゴム製の管状物であり、(B)は複層構造の中間転写ベルトとして用いた図である。
【符号の説明】
11 金型
11a 外周面
12 デイスペンサー
13 ノズル
13b テーパ状吐出口
15 原料供給管
20 スプリング手段
21 エルボ金具
21A 伝動板
22 押付力調整具
22a、22b 挟持板
23(23A、23B) スプリングプランジャー
23a コイルバネ
30 管状物
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a resin or rubber tubular product manufacturing apparatus, a manufacturing method, and a tubular product. Specifically, a liquid resin or rubber is applied to the outer peripheral surface of a cylindrical mold, and the applied material is cured. The tubular product is manufactured by releasing the mold, and the manufactured tubular product is suitably used for an intermediate transfer belt of an image forming apparatus.
[0002]
[Prior art]
Conventionally, resin or rubber tubular materials have been used in various fields as intermediate transfer belts for electrophotographic image forming apparatuses such as copying machines, printers, and facsimiles, and various other belts.
When used as an intermediate transfer belt or the like of an image forming apparatus, it is required to have excellent heat resistance and a uniform thickness in order to express desired performance. Conventionally, a tubular body having a uniform thickness is required. Various proposals have been made to obtain it.
[0003]
For example, in JP-A-9-85756 (Patent Document 1), a liquid heat-resistant resin having a viscosity of 10 to 1500 poise at 25 ° C. is continuously applied to the outer surface or inner surface of the core body by a dispenser while rotating the core body. And a method of manufacturing a tubular product in which an applied layer is formed by spirally winding the supplied liquid heat-resistant resin by moving the supply part of the dispenser in the direction of the rotation axis of the core body. ing.
[0004]
[Patent Document 1]
JP-A-9-85756
[Problems to be solved by the invention]
However, in the manufacturing method of Patent Document 1, if the tip of the nozzle does not accurately follow the outer peripheral surface of the mold and a minute gap is formed between the nozzle and the mold during application, air biting occurs. There is a problem that irregularities are easily formed on the coated surface. If the pressing force of the nozzle is increased in order not to generate this gap, the applied material is scraped at the tip of the nozzle, resulting in poor application, and the thickness of the tubular article to be formed is not uniform. Therefore, in order to obtain a uniform coating thickness, it is essential to adjust the parallelism of the mold and the dispenser in the scanning direction. However, automation is problematic in terms of the size of the equipment and the cost.
[0006]
The present invention has been made in view of the above-described problems, and it is an object of the present invention to easily manufacture a tubular product made of resin or rubber having a uniform thickness by causing the nozzle outlet to follow the outer peripheral surface of a mold. .
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, first, the present invention provides a resin or rubber that is liquid and heat-resistant while a nozzle of a dispenser is brought into contact with the outer peripheral surface of a rotating mold and moved in the axial direction of the mold. An apparatus for producing a tubular product made of resin or rubber that is continuously applied from the nozzle and is released from the mold after the resin or rubber is cured,
The mold is formed of a cylindrical object that is arranged with the axial direction horizontal, and a tapered discharge port that is inclined at a predetermined angle at the tip of the nozzle is disposed on the outer peripheral surface of the mold in the downward rotation direction.
The inclined base portion side of the tapered discharge port is set to a contact position that contacts the outer peripheral surface of the mold, and the acute angle portion on the tip side is set to the gap forming side without contacting the outer peripheral surface of the mold, and the nozzle And the mold is arranged such that the contact side of the tapered discharge port is the front side in the mold rotation direction and the gap forming side is the rear side in the rotation direction,
The coating angle θ that the line segment connecting the contact position and the center of the mold cross section becomes a horizontal line is set in a range of 40 to 85 degrees, and the inclination that is the lower side of the tapered discharge port of the nozzle The gap forming angle δ formed by the base and the outer peripheral surface of the mold is 0 degree <δ ≦ 30 degrees,
In addition, there is provided an apparatus for manufacturing a tubular article, comprising spring means for pressing the nozzle with a required pressure so as to be able to follow along the outer peripheral surface of the mold.
[0008]
According to the above configuration, it is possible to follow while keeping the pressing force of the nozzle against the outer peripheral surface of the mold evenly by the spring means, even if there is a slight misalignment in the parallelism of the mold and the scanning direction, Since the nozzle is automatically followed and pressed at a required pressure, the coating thickness can be made uniform without causing unevenness, and the accuracy of the manufactured tubular product can be improved.
In addition, since the nozzle outlet that comes into contact with the outer peripheral surface of the mold is tapered, a liquid material made of liquid resin or rubber can be reliably applied to the outer peripheral surface of the mold by making contact with the front side in the mold rotation direction. Since the gap is formed without contacting the outer peripheral surface of the mold on the rear side in the mold rotation direction of the discharge port, the applied liquid material is not scraped off at the edge of the discharge port. The taper angle of the discharge port is about 45 degrees, but the taper angle of the discharge port may be changed depending on the nozzle arrangement angle with respect to the mold outer peripheral surface, which will be described later, and is preferably in the range of 30 to 80 degrees.
Note that moving the nozzle in the mold axial direction means rotating the mold at a predetermined position and moving the nozzle in the mold axial direction, and moving the nozzle while rotating the mold while fixing the nozzle. Including cases.
[0010]
Specifically, a nozzle is disposed on the upper half circumference side of the mold that is arranged with the axial direction horizontal, and on the side of the downward rotation surface, the nozzle pressing position is the downward rotation side position of the mold, and the discharge of the nozzle The abutting side that presses the lower part of the outlet against the outer peripheral surface of the mold, and the acute angle protruding part at the upper part leave a gap with the outer peripheral surface of the mold .
As described above, in the nozzle arranged on the side with respect to the outer peripheral surface of the mold, the line segment connecting the pressing position of the nozzle to the mold and the center position of the mold in the mold cross-sectional direction is a horizontal plane. The coating angle θ is 40 degrees ≦ θ ≦ 85 degrees. If the angle is smaller than 40 degrees, the portion of the discharge port along the outer peripheral surface of the mold is reduced. It becomes difficult to apply. On the other hand, when the angle is greater than 85 degrees, there is a possibility that the nozzle may not be able to follow if there is an error in the parallelism of the mold and the dispenser in the scanning direction.
[0011]
In addition, the gap forming angle δ formed by the inclined base portion which is the lower side in the rotational direction of the tapered discharge port of the nozzle and the outer peripheral surface of the mold is 0 degree <δ ≦ 30 degrees. In this case, the gap disappears, and there is a risk of scraping it in contact with the coating material. On the other hand, if it exceeds 30 degrees, the gap becomes too large and the coating is performed while entraining air.
[0012]
The spring means for pressing the discharge port of the nozzle against the outer peripheral surface of the mold has an elbow fitting interposed between a supply pipe for supplying a raw material made of the liquid resin or rubber at a predetermined pressure and the nozzle. While a transmission plate is projected from the metal fitting, a pair of upper and lower clamping plates are projected from the raw material supply pipe, a spring plunger is attached to the clamping plate, and the transmission plate is interposed between the upper and lower spring plungers. With a sandwiched configuration,
According to the parallelism of the mold and the dispenser scanning direction by the spring means, the nozzle is moved close to and away from the outer peripheral surface of the mold and can be followed with a predetermined pressing pressure.
[0013]
As described above, since the transmission plate interlocked with the nozzle is sandwiched between the pistons of the opposing spring plunger as the spring means, the original position of the transmission plate is the same as the spring pressure of the spring plungers on both sides. Neutral position. Therefore, at the start of painting, if the nozzle discharge port is pressed against the outer peripheral surface of the mold at the neutral position, the nozzle will then move to the outer peripheral surface of the mold due to the correlation between the spring pressures of the spring plungers on both sides. It is automatically controlled so that it can follow. Thus, by using a pair of spring plungers as spring means, it becomes possible to cause the nozzle to accurately follow even a deviation of parallelism of several mm.
[0014]
Secondly, the present invention provides a method for producing a tubular product. In the manufacturing method, the nozzle is rotated while rotating a mold made of a cylindrical object arranged with the axial direction horizontal, and the nozzle of the dispenser is brought into contact with the outer peripheral surface thereof to move in the axial direction of the mold. More liquid heat resistant resin or rubber is discharged and applied continuously,
A method of manufacturing a tubular product made of resin or rubber that is released from the mold after curing the resin or rubber,
On the outer peripheral surface of the mold in the downward rotation direction, a tapered discharge port that is inclined at a predetermined angle at the tip of the nozzle is disposed,
The nozzle is pressed from the side against the outer peripheral surface of the mold with a required pressure by a spring means to follow the outer peripheral surface of the mold,
And, as a contact position where the inclined base side of the tapered outlet is in contact with the outer peripheral surface of the mold, a gap is formed without contacting the acute angle portion on the distal end side with the outer peripheral surface of the mold, The nozzle and the mold have a contact side of the tapered discharge port as a front side in the mold rotation direction and a gap forming side as a rear side in the rotation direction ,
The coating angle θ that the line segment connecting the contact position and the center of the mold cross section becomes a horizontal line is set in a range of 40 to 85 degrees, and the inclination that is the lower side of the tapered discharge port of the nozzle The gap forming angle δ formed by the base and the outer peripheral surface of the mold is set to 0 degree <δ ≦ 30 degrees, and the applied resin or rubber is not scraped off to make the coating thickness uniform. It is a feature.
[0015]
The manufacturing method may be a method of manufacturing using the above-described manufacturing apparatus, but is not necessarily required by the manufacturing method.
According to the above manufacturing method, even if there is a minute shift between the mold and the dispenser scanning direction, the nozzle can be automatically followed by the spring means, and the coating amount can be made uniform. In addition, since the nozzle discharge port prevents the applied material from being scraped off at the nozzle edge, a tube having a uniform thickness can be produced without causing unevenness or unevenness on the application surface. .
[0016]
Tube Jobutsu that produced, or Ru are prepared in the method by the production equipment is suitably used as an intermediate transfer belt or the transfer belt of the image forming apparatus i.e., obtained by the manufacturing apparatus or manufacturing method of the present invention The resulting tubular product has a seamless belt shape with uniform thickness and high dimensional accuracy. Therefore, it can be suitably used as an intermediate transfer belt, a transfer belt or the like of an image forming apparatus. For example, in the case of an intermediate transfer belt, the thickness of the tubular article is preferably 50 μm to 200 μm. According to this manufacturing method, a tubular product having a thickness of about 30 μm to 300 μm can be obtained with a uniform thickness.
[0017]
As the heat resistant resin, a polyimide resin or a polyamideimide resin is preferably used. Others include polyetherimide resins, epoxy resins, polybenzimidazole resins, polybenzoxazole resins, polyphenylene sulfide resins, polyether ketone resins, polyether sulfone resins, polysulfone resins, polyarylate resins, fluororesins, etc., precursors It is preferably applied as a solution. Among these, polyamideimide resin and polyimide resin are preferable in terms of high elastic modulus and processability.
Examples of the heat resistant rubber include silicone rubber and urethane rubber.
In addition, various additives such as inorganic fillers may be added to the heat-resistant resin or rubber, and a dispersant, a solvent, a viscosity modifier and the like can be added. The liquid heat-resistant resin or rubber is preferably applied at 10 to 50 ° C. with a viscosity of 0.1 Pa · s to 20 Pa · s.
[0018]
For the curing of the resin or rubber, it is necessary to heat the mold coated with the resin or rubber at least to the extent that the tubular material has self-supporting property. The heating temperature is preferably 130 ° C. or higher. In order to finally cure, it is necessary to heat to a very high temperature of about 200 ° C to 350 ° C. The heating time is preferably 1 hour to 5 hours, more preferably 1.5 hours to 3 hours.
[0019]
As the material of the mold, various metals such as aluminum and iron can be used. In order to make it easier to remove the tubular material, the outer peripheral surface of the mold may be subjected to a mold release treatment. As the mold release treatment, a conventionally known mold surface treatment can be performed, and as the mold release agent used for the mold release treatment, a release agent such as a fluorine type or a silicone type is preferable, and a baking type is particularly preferable. . In addition, ceramic coating such as alumina, silica, zirconia, aluminum nitride may be applied.
[0020]
The demolding of the cured resin or rubber is preferably after cooling the tubular product or the mold. Accordingly, the tubular object can be easily removed from the mold, and the tubular object can be removed in a good state without affecting the dimensional accuracy and performance of the tubular object.
[0021]
In addition, the tubular product of the present invention is provided with one or more layers of resin, rubber, elastomer, or the like, or a metal layer on the inner peripheral surface side and / or outer peripheral surface side, and two or more layers such as three or more layers. It can also be used as a layer structure. It should be noted that the outer peripheral surface of a cylindrical substrate such as a roller can be used by coating the tubular product of the present invention.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show a resin tubular product manufacturing apparatus 10 of the present invention.
The manufacturing apparatus 10 has a cylindrical mold 11 which is arranged with the axis direction horizontal and is rotated by a rotating means in the direction of arrow A in the figure, and the outer peripheral surface 11a of the mold 11 is liquid and heat resistant. A dispenser 12 that continuously feeds a resin or rubber-based material as a main component. The dispenser 12 is moved by a moving means (not shown) along the axial direction on the side of the mold 11. The
[0023]
The dispenser 12 has an L-shaped elbow fitting 21 interposed between the raw material supply pipe 15 and the nozzle 13, and a transmission plate 21 </ b> A projecting from the elbow fitting 21 by a spring means 20 attached to the raw material supply pipe 15. The nozzle 13 is configured to automatically follow the outer peripheral surface 11a of the mold 11 by the spring means 20.
[0024]
As shown in FIG. 2, a small-diameter cylindrical portion 13 a having a rectangular cross section is provided on the nozzle 13 side of the nozzle 13, and the tip thereof is a tapered discharge port 13 b. The discharge port 13b has the inclined base portion 13b-1 side in contact with the outer peripheral surface 11a of the mold 11, and the sharp angle portion 13b-2 on the distal end side is not in contact with the outer peripheral surface 11a of the mold 11 and has a gap. The forming side. In the present embodiment, the taper angle of the discharge port formed by the tapered discharge port 13b of the nozzle 13 with respect to the axial direction of the nozzle 13 is 45 degrees.
The nozzle 13 and the mold 11 are the contact side, which is the inclined base portion 13b-1 side of the tapered discharge port 13b, on the front side in the mold rotation direction A, and the acute angle portion 13b-2 side of the tapered discharge port 13b. The gap forming side is arranged as the rear side in the rotation direction A.
[0025]
Specifically, as shown in FIG. 2 (B), and is abutted against the inclined base 13 b-1 of the discharge port 13 b of the nozzle 13 on half surfaces of the downward rotational direction of the die 11, this embodiment In the embodiment, the coating angle θ that the line segment connecting the contact position P and the center O of the mold cross section becomes a horizontal line is set to 50 degrees.
2C, the nozzle 13 is inclined in the axial direction of the mold 11, and the nozzle 13 on the side opposite to the material coating direction (arrow B in the figure), which is the moving direction of the nozzle 13, is provided. The acute angle portion 13 b-3 is not brought into contact with the outer peripheral surface 11 a of the mold 11. In the present embodiment, in the axial direction of the mold 11, the gap forming angle δ formed by the end surface of the inclined base portion 13 b-1 on the lower side of the tapered discharge port 13 b of the nozzle 13 and the outer peripheral surface 11 a of the mold 11 is set to 10. I am trying.
[0026]
As shown in FIGS. 3A to 3G, the spring means 20 projects the transmission plate 21 </ b> A from the elbow fitting 21, while fixing one end of the pressing force adjusting tool 22 to the raw material supply pipe 15 with a bolt. A spring plunger 23 (23A, 23B) is attached facing the tip of a pair of sandwiching plates 22a , 22b protruding from the other end, and the transmission plate 21A is sandwiched between the upper and lower spring plungers 23.
The spring plunger 23 includes a coil spring 23a and a center pin 23b that is biased by the coil spring 23a and protrudes / retreats from the cylinder.
Thus, the elbow fitting 21 can be tilted by the spring pressure of the spring plungers 23 </ b> A and 23 </ b> B, the movement of the nozzle 13 interlocking with the movement of the elbow fitting 21 is absorbed, and the nozzle 13 is pressed against the outer peripheral surface 11 a of the mold 11. The force can be automatically controlled to the required pressure.
[0027]
Next, a method for producing a tubular object using the above apparatus will be described.
First, a coating material composed of a precursor solution of a heat resistant resin to which carbon black or the like is added in order to impart conductivity is prepared in advance. Polyamideimide resin is used as the heat resistant resin.
The mold 11 is rotated in the direction of arrow A in the figure, and the dispenser 12 is moved in the axial direction of the mold 11 (in the direction of arrow B in the figure), so that the raw material supplied to the dispenser 12 is The mold 11 is continuously applied to the outer peripheral surface 11a .
[0028]
At this time, the pressing force of the nozzle 13 against the outer peripheral surface 11a of the mold 11 is regulated at the neutral position of the pair of upper and lower spring plungers 23 of the spring means 20 and controlled to a required pressure at the start of operation. Further, the spring means 20 controls the pressure to a required pressure, and the tapered discharge port 13 b of the nozzle 13 is brought into contact with the outer peripheral surface 11 a of the mold 11 from an oblique direction with respect to the outer peripheral surface 11 a of the mold 11.
Specifically, the front side of the taper-shaped discharge port 13b in the mold rotation direction A is abutted against the outer peripheral surface 11a of the mold 11, and the coating is performed while the taper-shaped discharge port 13b in the mold rotation direction A is applied. There is a gap between the rear side and the outer peripheral surface 11 a of the mold 11.
[0029]
During application of the material, the pressing force of the nozzle 13 to the required pressure by the spring means 20, and, with respect to the vertical direction (mold across the transmission plate 21 A between the center pin 23b of the upper and lower spring plunger 23 Therefore, the taper-shaped discharge port 13b of the nozzle 13 is automatically applied to the outer peripheral surface 11a of the mold 11 with high accuracy even if there is a slight deviation in parallelism between the mold and the dispenser scanning direction. Can be made to follow. Therefore, the coating thickness can be made uniform without causing unevenness.
[0030]
Further, the discharge port of the nozzle 13 is tapered discharge port 13b, since the a gap between the mold outer peripheral surface 11a in the rotational direction rear side, the coating material is applied to the mold outer peripheral surface 11a, a tapered Since there is no shaving at the edge of the rotational discharge side 13b on the rotation delay side (the rear side of the rotation method) or the coated coating material is not scraped off at the edge of the tapered discharge port 13b, poor coating or poor thickness occurs. Nor.
Therefore, the raw material can be applied uniformly over the entire outer peripheral surface 11a without thickness unevenness, and the tubular product 30 having a uniform thickness with a thickness variation of ± 3 μm or less can be easily obtained.
[0031]
The raw material consisting of the precursor solution of the heat resistant resin applied on the outer peripheral surface 11a of the mold 11 by the above method is heated while rotating the mold 11 at 150 ° C. for 1 hour and then at 300 ° C. for 3 hours. Harden. At this time, the heat resistant resin of the precursor solution is completely imidized. After the precursor solution is cured in this way to form the tubular product 30, the tubular product 30 is released from the mold 11 after cooling to room temperature.
[0032]
As shown in FIG. 4A, the tubular product 30 obtained by the above method can be used as a rigid layer of an intermediate transfer belt 40 having a multilayer structure, for example, as shown in FIG. The intermediate transfer belt 40 may have a multilayer structure including a rigid layer based on the tubular product 30 of the present invention, an elastic layer 41, and a surface coating layer 42. Note that it is possible to use only the tubular material 30 as an intermediate transfer belt. In addition, it can be suitably used as a transfer belt of an image forming apparatus.
[0033]
In the above-described embodiment, the nozzle side is moved, but the nozzle side may be fixed and the coating may be performed by moving in the axial direction while rotating the mold side.
[0034]
Hereinafter, the Example of the manufacturing method of the resin or rubber-made tubular product of this invention and a comparative example are explained in full detail.
[0035]
Example 1
A tubular product was prepared by applying a polyamideimide precursor solution in the same manner as in the above embodiment. A height gauge was attached to the nozzle, and the runout was measured by scanning a 400 mm length from the coating start position to the end position on the outer peripheral surface of the mold. The result was 200 μm, indicating rotational runout at one location on the outer peripheral surface of the mold. When measured, the rotation was elliptical (eccentric rotation), and the amplitude width, which is the vibration, was 80 μm.
Since the pressing force of the nozzle was made the required pressure by the spring means, the nozzle automatically followed the outer peripheral surface of the mold, and the nozzle position was not adjusted during the application. After the application was completed, the coated mold was heated while rotating to remove the mold after the resin was cured to obtain a tubular product (inner diameter 180 mm, length 400 mm, thickness 100 μm). There was no unevenness or unevenness in the tubular material, and the thickness variation was ± 1 μm.
[0036]
(Comparative Example 1)
Without attaching the spring means, coating was performed in a state where the nozzle did not automatically follow the outer peripheral surface of the mold to obtain a tubular product. Depending on the application situation, the application was performed while adjusting the nozzle position during application. Others were the same as in Example 1.
Although there was no unevenness or unevenness in the tubular material, the thickness variation was ± 4 μm.
[0037]
(Comparative Example 2)
Without attaching the spring means, coating was performed in a state where the nozzle did not automatically follow the outer peripheral surface of the mold to obtain a tubular product. And it was the same as that of Example 1 except that the nozzle position was not adjusted during application.
During the application, the applied material was scraped by the nozzle and remained in a streak shape, and the thickness variation was ± 13 μm.
[0038]
As described above, in Example 1, since the tapered discharge port of the nozzle automatically follows the minute change of the outer peripheral surface of the mold, a tubular product having a uniform thickness was obtained. On the other hand, in Comparative Example 1, it is necessary to change the position of the discharge port of the nozzle according to the application state during the application, and the thickness variation is ± 4 μm even if the position of the discharge port of the nozzle is adjusted. The variation was larger than that in Example 1. In Comparative Example 2, the nozzle position was not adjusted. The thickness variation was as large as ± 13 μm.
[0039]
【The invention's effect】
As is apparent from the above description, according to the present invention, the nozzle is automatically pressed against the outer peripheral surface of the mold by the spring means, and the tapered discharge port of the nozzle is automatically applied to the outer peripheral surface of the rotating mold. Therefore, it is not necessary to adjust the position of the discharge port of the nozzle during application, and the contact between the nozzle and the mold can always be maintained in a desired state.
[0040]
In addition, the nozzle discharge port is a tapered discharge port, and a gap is formed between the discharge port and the outer peripheral surface of the mold on the rear end side in the mold rotation direction so that the coating material is not scraped at the edge of the discharge port. Therefore, it is possible to automatically apply the resin or the rubber with a uniform thickness without causing poor application or poor thickness. Therefore, even when there is a slight deviation in the parallelism between the nozzle and the outer peripheral surface of the mold, it is possible to easily manufacture a resin or rubber tubular product having a uniform thickness.
[0041]
The tubular product of the present invention produced by the above method is excellent in heat resistance, has good dimensional accuracy, and has a uniform thickness without scratches or tears. Therefore, an image forming apparatus such as a copying machine, a facsimile, or a printer. It can be suitably used as an intermediate transfer belt, a transfer belt, etc.
[Brief description of the drawings]
FIGS. 1A and 1B are schematic views of a relationship between a nozzle and a mold.
FIGS. 2A and 2B are explanatory diagrams of contact positions between the nozzle and the outer peripheral surface of the mold, FIG. 2C is a diagram showing the relationship between the coating direction and the inclination of the nozzle, and FIG. FIG.
FIG. 3 is an explanatory diagram of the component configuration of the spring means, (A) to (C) are diagrams showing the relationship between the nozzle, the spring plunger, and the elbow fitting, and (D) to (F) are the configuration of the nozzle. (G) is a block diagram of a spring plunger.
4A is a resin or rubber tubular product of the present invention, and FIG. 4B is a diagram used as an intermediate transfer belt having a multilayer structure.
[Explanation of symbols]
11 Mold 11a Outer peripheral surface 12 Dispenser 13 Nozzle 13b Tapered discharge port 15 Raw material supply pipe 20 Spring means 21 Elbow fitting 21A Transmission plate 22 Pressing force adjuster
22a, 22b Holding plate 23 (23A, 23B) Spring plunger 23a Coil spring 30 Tubular object

Claims (3)

回転される金型外周面にディスペンサーのノズルを当接させ、該金型軸線方向に移動させながら液状で耐熱性を有する樹脂又はゴムを上記ノズルより連続的に塗布し、上記樹脂又はゴムを硬化させた後に上記金型から離型する樹脂製又はゴム製の管状物の製造装置であって、
上記金型は軸線方向を水平として配置される円筒状物からなり、該金型の下向き回転方向の外周面に、上記ノズルの先端に所定角度で傾斜させたテーパ状吐出口を配置し、
上記テーパ状吐出口の傾斜基部側を上記金型の外周面へ当接する当接位置とすると共に先端側の鋭角部を金型の外周型面に当接させずに隙間形成側とし、該ノズルと上記金型とは上記テーパ状吐出口の当接側を金型回転方向の前側とすると共に隙間形成側を回転方向の後側として配置し、
上記当接位置と上記金型断面の中心を結ぶ線分が水平線となす塗工角度θを40〜85度の範囲に設定し、かつ、上記ノズルのテーパ状吐出口の下部側となる上記傾斜基部と上記金型の外周面とがなす隙間形成角度δを、0度<δ≦30度とし、
かつ、上記金型外周面に沿って追従可能に上記ノズルを所要圧で押し付けるスプリング手段を備えていることを特徴とする管状物の製造装置。
A dispenser nozzle is brought into contact with the outer peripheral surface of the rotating mold, and liquid or heat-resistant resin or rubber is continuously applied from the nozzle while moving in the mold axial direction, and the resin or rubber is cured. An apparatus for producing a tubular product made of resin or rubber, which is released from the mold after being made,
The mold is formed of a cylindrical object that is arranged with the axial direction horizontal, and a tapered discharge port that is inclined at a predetermined angle at the tip of the nozzle is disposed on the outer peripheral surface of the mold in the downward rotation direction.
The inclined base portion side of the tapered discharge port is set to a contact position that contacts the outer peripheral surface of the mold, and the acute angle portion on the tip side is set to the gap forming side without contacting the outer peripheral surface of the mold, and the nozzle And the mold is arranged such that the contact side of the tapered discharge port is the front side in the mold rotation direction and the gap forming side is the rear side in the rotation direction,
The coating angle θ that the line segment connecting the contact position and the center of the mold cross section becomes a horizontal line is set in a range of 40 to 85 degrees, and the inclination that is the lower side of the tapered discharge port of the nozzle The gap forming angle δ formed by the base and the outer peripheral surface of the mold is 0 degree <δ ≦ 30 degrees,
And the manufacturing apparatus of the tubular thing characterized by including the spring means which presses the said nozzle with required pressure so that tracking is possible along the said metal mold | die outer peripheral surface.
上記スプリング手段は、上記液状の樹脂又はゴムからなる原料を所要圧力で供給する供給管と上記ノズルとの間にエルボ金具を介設し、該エルボ金具から伝動板を突設する一方、上記原料供給管より上下一対の挟持板を突設し、これら挟持板に対向してスプリングプランジャーを取り付け、この上下スプリングプランジャーの間に上記伝動板を挟み込んだ構成とし、
上記スプリング手段により上記金型の外周面の凹凸に応じて上記ノズルを金型外周面に近接離反させて均等した押付圧で追従できる構成としている請求項1に記載の管状物の製造装置。
The spring means includes an elbow fitting interposed between the nozzle and the supply pipe for supplying the liquid resin or rubber raw material at a required pressure, and a power transmission plate protruding from the elbow fitting, A pair of upper and lower clamping plates are projected from the supply pipe, a spring plunger is attached to face the clamping plates, and the transmission plate is sandwiched between the upper and lower spring plungers.
2. The tubular article manufacturing apparatus according to claim 1, wherein the spring means allows the nozzle to be moved close to and away from the outer peripheral surface of the mold in accordance with irregularities on the outer peripheral surface of the mold and to follow with a uniform pressing pressure .
軸線方向を水平として配置される円筒状物からなる金型を回転させ、その外周面に、ディスペンサーのノズルを当接させて上記金型の軸線方向に移動させながら、上記ノズルより液状の耐熱性を有する樹脂又はゴムを吐出させて連続的に塗布し、
上記樹脂又はゴムを硬化させた後に上記金型から離型する樹脂製又はゴム製の管状物の製造方法であって、
上記金型の下向き回転方向の外周面に、上記ノズルの先端に所定角度で傾斜させたテーパ状吐出口を配置し、
上記ノズルを上記金型の外周面に対して側方よりスプリング手段により所要圧力で押し付けて上記金型外周面に追従させ、
かつ、上記テーパ状吐出口の傾斜基部側を上記金型の外周面へ当接する当接位置とすると共に先端側の鋭角部を金型の外周型面に当接させずに隙間を形成し、該ノズルと上記金型とは上記テーパ状吐出口の当接側を金型回転方向の前側とすると共に隙間形成側を回転方向の後側とし
上記当接位置と上記金型断面の中心を結ぶ線分が水平線となす塗工角度θを40〜85度の範囲に設定し、かつ、上記ノズルのテーパ状吐出口の下部側となる上記傾斜基部と上記金型の外周面とがなす隙間形成角度δを、0度<δ≦30度として、塗布された上記樹脂またはゴムを掻き落さないようにして塗装厚みを均等にしていることを特徴とする管状物の製造方法。
Rotating a cylindrical mold placed horizontally with the axis line in the horizontal direction, with the nozzle of the dispenser coming into contact with the outer peripheral surface and moving in the axis direction of the mold, the liquid heat resistance from the nozzle It is applied continuously by discharging resin or rubber having
A method of manufacturing a tubular product made of resin or rubber that is released from the mold after curing the resin or rubber,
On the outer peripheral surface of the mold in the downward rotation direction, a tapered discharge port that is inclined at a predetermined angle at the tip of the nozzle is disposed,
The nozzle is pressed from the side against the outer peripheral surface of the mold with a required pressure by a spring means to follow the outer peripheral surface of the mold,
And, as a contact position where the inclined base side of the tapered outlet is in contact with the outer peripheral surface of the mold, a gap is formed without contacting the acute angle portion on the distal end side with the outer peripheral surface of the mold, The nozzle and the mold have a contact side of the tapered discharge port as a front side in the mold rotation direction and a gap forming side as a rear side in the rotation direction ,
The coating angle θ that the line segment connecting the contact position and the center of the mold cross section becomes a horizontal line is set in a range of 40 to 85 degrees, and the inclination that is the lower side of the tapered discharge port of the nozzle The gap forming angle δ formed by the base and the outer peripheral surface of the mold is set to 0 degree <δ ≦ 30 degrees, and the applied resin or rubber is not scraped off to make the coating thickness uniform. A method for producing a tubular article.
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