JP4696257B2

JP4696257B2 - Manufacturing method of powder seal piece of rotating shaft

Info

Publication number: JP4696257B2
Application number: JP2000100478A
Authority: JP
Inventors: 益夫竹内
Original assignee: 益夫竹内
Priority date: 1999-06-15
Filing date: 2000-04-03
Publication date: 2011-06-08
Anticipated expiration: 2020-04-03
Also published as: JP2001059575A

Description

【０００１】
【産業上の利用分野】
本発明は回転軸の粉末シール片、例えば特開平５−１８１３５４号、発明の名称「回転軸の粉末シール片ホルダー」（出願人の特許出願）に記載のような粉末シール片を、均一、高精度に、また簡単、迅速に製造して、安価に提供できるようにしたことを特徴とする製造法に係り、また該製造法によって製造した粉末シール片に係るものである。
【０００２】
【従来技術とその課題】
現在、複写機、ファックス、プリンター等において、トナー（例、カーボン微粉末）を充填した長方形箱状等のケースにマグネットローラー、転写ローラー等の回転軸をセットしたトナーカートリッジ等が広く用いられているが、長期間の使用により、これらの回転軸１の周面に付着した粉末２が軸受部３に混入して回転の妨げにならないように、通常、軸受部３の内側（例、トナー槽の左右側板４）に粉末２をシールするシール部５を設けて、該シール部５から軸受部３側へ粉末がもれ出ないようにしている。（図１５、図１６参照）
【０００３】
該シール部５は回転軸１をトナーケース等の正面側若しくは上面側から嵌合取付けするＵ字形等の凹部５ａを形成し、該凹部５ａの内周面に、粉末のもれをシールする粉末シール片ａを両面接着フイルムで一体的に接着しているものである。（図１４参照）
【０００４】
そして、粉末シール片ａは素材として、弾力性があって摩擦抵抗が極めて少なく、耐久性に秀れ、高密度に絡合した繊維が微粉末の侵入を有効に防御する作用を行う等の秀れた特性を兼備したテフロンフエルトを使用している。
また、該テフロンフエルトは１万円札大で１万円すると言われる位に極めて高価であり、厚さが増すほど高価であるため、粉末シール片ａは他のクッション性の素材（例、発泡プラスチック、通常のフエルト等）と組み合わせて製作するのが通例である。
【０００５】
上記粉末シール片ａは、メーカーによって多少相違するが、例えば、幅５ｍｍ位、長さ５０ｍｍ位、厚さ１〜５ｍｍ位のテフロンフエルト片に発泡プラスチック片等を接着して積層形成したものの裏面に両面接着フイルム７の片面を接着（他方面に剥離紙７´を接着）したものであり、該粉末シール片ａを、上記シール部５の凹部５ａの内周面に、両面接着フイルム７の他方面（剥離紙７´を剥がして）を接着して取付けるものであるが、（図１４参照）
従来、上記粉末シール片ａの取付け作業はユーザーの保守、修理等の現場において、全て手作業によって行われており、その非能率性の解決が最大の課題とされてきたものである。
即ち、粉末シール片ａの両面接着テープ７の剥離紙７´を剥がして凹部５ａの内周面に接着するのであるが、その時、粉末もれを防ぐため、粉末シール片ａが回転軸１の周面に良く馴染んで密着するように、作業者の指先で粉末シール片ａを凹部５ａの内周面に扱くようにして押しつけて接着するようにしている。
ところが、どうしても粉末シール片ａの内面側に皺（しわ）１０が寄って凸凹になってしまい、それを指先で扱いて矯正してもなかなか平滑にならない上に、熟練の度合いによってバラツキが多く生じる難点があった。（図１４の（イ）、（ロ）参照）
【０００６】
【発明の目的】
そこで、上記特許出願に係る粉末シール片は、テフロンフエルトと弾力性のある発泡プラスチックを接着し、その発泡プラスチックの裏面に両面接着テープの片面を接着（他方面に剥離紙７´を接着）して積層構成し、該積層構成のものをシール部の凹部の形状に見合ったＵ字形等の形状に構成した、回転軸の粉末シール片を設け、
該Ｕ字形等の粉末シール片を僅かにすぼませた状態で、トナーケース等の回転軸のシール部の略円形若しくは半円形の凹部内に挿入し、シール部の略円形若しくは半円形の凹部の内面に両面接着テープで固着して取付けるようにして、上記従来の課題を解決したのである。
【０００７】
然るところ、上記特許出願に係る回転軸の粉末シール片を均一高精度に製造して、大量に安価に提供するには下記のような課題があった。
【０００８】
第１の課題は、如何にすればテフロンフェルトシートと発泡プラスチックシートを回転軸受部分にシール材として長期間使用しても剥離しないような状態に強固に接着できるかであった。
例えば、最も一般的な手段として両面粘着テープ若しくはフィルムで両者を粘着することが行われているが、この場合、剥離しやすく、位置ずれを生じ、また経時劣化するため、所謂粘着状態では長期使用に耐久できない。
よって、加熱で溶融して強力な粘着力を発揮し、冷えると元のフィルム状態に戻る熱溶融性合成樹脂製の接着フィルムが最適である。
【０００９】
ところが、テフロンフェルトは熱に強い特性を有する反面、他の素材と接着しにくい性質があり、一方、発泡プラスチックは合成樹脂系の接着材で容易に他の素材と接着する反面、熱に弱く比較的低い温度で変質、溶融する難点がある。
よって、テフロンフェルトシートと発泡プラスチックシートの間に上記接着フィルムを介在して加熱加圧すると、接着フィルムが溶融して発泡プラスチックシートと良好に接着した温度では、接着フィルムとテフロンフェルトシートは接着しない。
しかし、テフロンフェルトシートと接着フィルムが良好に接着するまで温度を上げると、発泡プラスチックシートが変質、溶融してしまうという、極めて解決が困難な課題があった。
【００１０】
第２の課題は、テフロンフェルトシートと発泡プラスチックシートを積層形成したものをＵ形、Ｃ形、Ｊ形、その他の形状に成形するときに、如何にしてテフロンフェルトの内面に皺が生じないように平滑に発泡プラスチックに接着するかであった。
例えば、はじめから、テフロンフェルトシートと発泡プラスチックシートの全面を一体的に接着した状態のもの、またはテフロンフェルトシートと発泡プラスチックシートを単に重合した状態のものを、Ｕ形、Ｇ形、Ｊ形、Ω形等の成形用型で加圧加熱成形すると、必ずテフロンフェルトシートの内面に皺を生じてしまうのであった。（図１４参照）
【００１１】
【発明が解決した課題】
本発明は上記第１の課題を、まず、テフロンフェルトシートと接着フィルムを発泡プラスチックシートが変質、溶融する以上の高温で加熱加圧して一体的に接着し、次いで上記一体的に接着したものと発泡プラスチックシートを重合し、発泡プラスチックシートは変質、溶融しないが接着フィルムは溶融するくらいの温度で加熱加圧して、両者を一体的に接着することによって解決し、
【００１２】
また、第２の課題は、まず、テフロンフェルトシートと接着フィルムを一体にしたものと発泡プラスチックシートの一部分だけを加圧加熱接着したものを設け、このものを成型用型にかけて、雌雄型間の押圧で予め接着した一部分を基点として皺を生じないように、展ばし馴らし扱くように押し付けて、発泡プラスチックのＵ形等の内面にテフロンフェルトシートを接着フィルムを介して密着設置して、加熱することによって、テフロンフェルトシートに皺を生じることなく両者を一体的に接着すると共にＵ形等に成形するようにして解決したものである。
【００１３】
【課題を解決する手段１】
「回転軸の粉末シール片の製造法」
即ち、本発明は、設定幅及び長さのテフロンフェルトシートの片面に熱溶融性合成樹脂製の接着フィルムを重合し、それを後記発泡プラスチックシートが変質、溶融する温度より高い温度で加熱加圧し、接着フィルムの加熱溶融で両者を一体的に接着してシートＢを設け、
【００１４】
設定幅及び長さの発泡プラスチックシートの片面に両面粘着フィルムの片面を粘着すると共に他面の剥離紙はそのまま残してシートＣを設け、
【００１５】
上記シートＢとシートＣを裁断して設定幅及び長さの短冊状若しくは帯状に形成し、そのシートＢの接着フィルム面とシートＣの発砲プラスチックシート面を重合すると共に、その一部分をシートＣの発泡プラスチックシートが変質、溶融しない温度で加熱加圧し、接着フィルムの加熱溶融で接着してシートＤを設け、
【００１６】
次に、横断面Ｕ形、Ｃ形、Ｊ形、Ω形等の雄型、雌型からなるプレス成形用型に上記のシートＤをセットし、雌雄型間でシートＢのテフロンフェルトシートの内面側に皺を生じないように、予め接着してある一部分を基点として展ばし馴らし扱くように押し付け、発泡プラスチックシートが変質、溶融しない温度で加熱し、接着フィルムの加熱溶融でシートＢをシートＣの発泡プラスチックシートに一体的に接着しつつＵ形、Ｃ形、Ｊ形、Ω形等に成形し、それを成形用型から取り外して、横断面Ｕ形、Ｃ形、Ｊ形、Ω形等の粉末シール片の原材Ｅを設け、
【００１７】
上記の原材Ｅを設定幅宛に切断して、若しくはシートＣの剥離紙を残した状態で設定幅宛に切断して、Ｕ形、Ｃ形、Ｊ形、Ω形等の、回転軸の粉末シール片Ａを設けるようにしたものである、回転軸の粉末シール片の製造法によって、課題を解決したものである。
【００１８】
【課題を解決する手段２】
「回転軸の粉末シール片」
本発明は、テフロンフェルトシートの片面に熱溶融性合成樹脂製の接着フィルムを一体的に接着して設けたシートＢ、
【００１９】
発泡プラスチックシートの片面に両面粘着フィルムの片面を粘着すると共に他面の剥離紙はそのまま残して設けたシートＣ、
【００２０】
上記シートＢとシートＣを、シートＢの接着フィルム面とシートＣの発砲プラスチックシート面を重合し、その一部分を接着フィルムの加熱溶融で接着して設けたシートＤ、
【００２１】
横断面Ｕ形、Ｃ形、Ｊ形、Ω形等の雄型、雌型からなるプレス成形用型に上記のシートＤをセットし、雌雄型間で加熱加圧し、接着フィルムの加熱溶融でシートＢをシートＣの発泡プラスチックシート面に一体的に接着しつつＵ形、Ｃ形、Ｊ形、Ω形等に成形し、それを成形用型から取り外して設けた横断面Ｕ形、Ｃ形、Ｊ形、Ω形等の粉末シール片の原材Ｅ、
【００２２】
上記原材Ｅを設定幅宛に切断して設けた、若しくはシートＣの剥離紙を残した状態で設定幅宛に切断して設けた、Ｕ形、Ｃ形、Ｊ形、Ω形等の、回転軸の粉末シール片、によって課題を解決したものである。
【００２３】
【実施例】
設定幅及び長さのテフロンフェルトシート８の片面に熱溶融性合成樹脂製の接着フィルム９を重合し、それを後記発泡プラスチックシート６が変質、溶融する温度より高い温度で加熱加圧し、接着フィルムの加熱溶融で両者を一体的に接着してシートＢを設け、（図４）
【００２４】
設定幅及び長さの発泡プラスチックシート６の片面に両面粘着フィルム７の片面を粘着すると共に他面の剥離紙７´はそのまま残してシートＣを設け、（図５）
【００２５】
上記シートＢとシートＣを裁断して設定幅及び長さの短冊状若しくは帯状に形成し、そのシートＢの接着フィルム９面とシートＣの発砲プラスチックシート６面を重合すると共に、その一部分１２をシートＣの発泡プラスチックシート６が変質、溶融しない温度で加熱加圧し、接着フィルム９の加熱溶融で接着してシートＤを設け、（図６、図７）
【００２６】
次に、横断面Ｕ形、Ｃ形、Ｊ形、Ω形等の雄型、雌型からなるプレス成形用型１１に上記のシートＤをセットし、雌雄型１１ａ、１１ｂ間でシートＢのテフロンフェルトシート８の内面側に皺１０を生じないように、予め接着してある一部分１２を基点として展ばし馴らし扱くように押し付け、発泡プラスチックシート６が変質、溶融しない温度で加熱し、接着フィルム９の加熱溶融でシートＢをシートＣの発泡プラスチックシート６に一体的に接着しつつＵ形、Ｃ形、Ｊ形、Ω形等に成形し、それを成形用型１１から取り外して、横断面Ｕ形、Ｃ形、Ｊ形、Ω形等の粉末シール片ホルダーＡの原材Ｅを設け、（図８〜図９、及び図１０〜図１３）
【００２７】
上記の原材Ｅを設定幅宛に切断して、若しくはシートＣの剥離紙７´を残した状態で設定幅宛に切断して、Ｕ形、Ｃ形、Ｊ形、Ω形等の、回転軸の粉末シール片Ａを設けるようにした、回転軸の粉末シール片Ａの製造法であり、該製造法によって製造した回転軸の粉末シール片Ａである。（図１、図２、及び図３）
【００２８】
なお、シートＢは、設定幅及び長さのテフロンフェルトシートの片面に接着フィルムを接着したのち、それを裁断して設定幅及び長さの短冊状若しくは帯状に形成するか、若しくは、予め設定幅及び長さの短冊状若しくは帯状に形成したテフロンフェルトシートの片面に同形同大の接着フィルムを接着して設けるか、任意ある。
【００２９】
また、シートＣは、設定幅及び長さの発泡プラスチックシートの片面に両面粘着フィルムの片面を粘着すると共に他面の剥離紙はそのまま残し、それを裁断して設定幅及び長さの短冊状若しくは帯状に形成するか、若しくは、予め設定幅及び長さの短冊状若しくは帯状に形成した発泡プラスチックシートの片面に同形同大の両面粘着フィルムの片面を粘着すると共に他面の剥離紙はそのまま残して設けか、任意である。
【００３０】
また、テフロンフェルトシートの幅に比し発泡プラスチックシートの幅を予め大に形成し、Ｕ形、Ｃ形、Ｊ形、Ω形等に成形するときにテフロンフェルトシートの外周面に発泡プラスチックシートが巻き付くようにして、幅寸法の過不足なく工合良く仕上がるようにする。（図１０〜図１３参照）
【００３１】
【課題を解決する手段３】
「テフロンフェルトと発泡プラスチックの接着方法」
本発明は、テフロンフェルトと発泡プラスチックを熱溶融性合成樹脂製の接着フィルムの溶融接着で強固一体的に接着するにつき、
まず、発泡プラスチックが変質、溶融する以上の高温でテフロンフェルトと接着フィルムを加熱加圧して両者を一体的に接着し、
次で、上記のテフロンフェルトと接着フィルムを一体的に接着したものと発泡プラスチックを接着フィルムを中間にして重合し、発泡プラスチックが変質、溶融せず、接着フィルムは溶融する温度で加熱加圧して両者を一体的に接着するようにした、テフロンフェルトと発泡プラスチックの接着方法によって、課題を解決したものである。
【００３２】
【課題を解決する手段４】
「テフロンフェルトと発泡プラスチックの接着及び成形方法」
本発明は、テフロンフェルトと発泡プラスチックを熱溶融性合成樹脂製の接着フィルムの溶融接着で強固一体的に接着すると共に、プレス成形用型でＵ形その他の形状に成形するにつき、
まず、発泡プラスチックが変質、溶融する以上の高温でテフロンフェルトと接着フィルムを加熱加圧して両者を一体的に接着し、
次で、上記のテフロンフェルトと接着フィルムを一体的に接着したものと発泡プラスチックを接着フィルムを中間にして重合し、その一部分例えば一方の側縁等を発泡プラスチックが変質、溶融せず、接着フィルムは溶融する温度で加熱加圧して一体的に接着した後、そのものを成形用型によって発泡プラスチックが変質、溶融せず、接着フィルムは溶融する温度で加圧加熱して両者を一体的に接着すると同時にＵ形その他の形状に成形するようにした、テフロンフェルトと発泡プラスチックの接着及び成形方法によって、課題を解決したものである。
【００３３】
【効果】
テフロンフェルトシートに接着フィルムを高温で加熱加圧して一体的に接着したのち、そのものと発泡プラスチックシートを前記より低温で加熱加圧して一体的に接着するようにしたので、両者が長期間の使用でも剥離することがない極めて耐久性に優れた粉末シール片を製造することができる。
【００３４】
Ｕ形、Ｃ形、Ｊ形、Ω形等に成形加工するときに、テフロンフェルトシートの内面側に皺が生じる難点があるが、本発明は予めテフロンフェルトシートと発泡プラスチックシートの一部分を接着しておき、そのものを成形用型にかけて成形することによって、テフロンフェルトシートが前記一部分を基点として雌雄型間で皺が生じないように展ばし馴らし扱くように押し付けられ、皺のない状態に重合した状態で加圧加熱成形されるため、粉末シール片の内面に皺がなく平滑で粉末洩れを生じない優れた粉末シール片を製造できる特徴がある。
【００３５】
また、テフロンフェルトシートの幅に比し発泡プラスチックシートの幅を予め大に形成しておけば、Ｕ形、Ｃ形、Ｊ形、Ω形等に成形したときにテフロンフェルトシートの外周面に発泡プラスチックシートが巻き付くようになって、過不足なく工合良く仕上げることができる。（図１０〜図１３参照）
【００３６】
テフロンフェルトシートと発泡プラスチックシートを重合したものをプレス成形用型で加圧加熱してＵ形、Ｃ形、Ｊ形、Ω形等に成形するとき、両者を雌雄型間で加圧し皺のない状態でＵ形、Ｃ形、Ｊ形、Ω形等に重合曲成した状態で加熱して接着するようにしたので、離型後のＵ形、Ｃ形、Ｊ形、Ω形等の形状を戻りのない不変で強固なものに仕上げ得る優れた効果がある。
【図面の簡単な説明】
【図１】本発明方法で製造した、Ｕ形の、回転軸の粉末シール片の正面図、平面図、及び右側面図。
【図２】図１のＦ−Ｆ線拡大断面図。
【図３】本発明方法で製造した、Ｊ形の、回転軸の粉末シール片の正面図、平面図、及び右側面図。
【図４】粉末シール片用のテフロンフェルトシートと接着フィルムを一体的に接着したシートＢの横断面図。
【図５】ホルダー部用の発泡プラスチックシートと両面粘着フィルムの片面を粘着したシートＣの横断面図。
【図６】シートＢとシートＣの一部分（例、一側縁）を接着して設けたシートＤの横断面図。
【図７】図６のシートＤの平面図。
【図８】成形用型でシートＤを加圧加熱成形して原材Ｅを設ける説明横断面図で、成形前を示す図。
【図９】成形用型でシートＤを加圧加熱成形して原材Ｅを設ける説明横断面図で、成形時を示す図。
【図１０】図８の成形用型によりシートＤをＵ形の原材Ｅに成形する順を示す説明図。
【図１１】図１０の次の成形状態を示す説明図。
【図１２】図１１の次の成形状態を示す説明図。
【図１３】Ｕ形の原材Ｅに成形した状態を示す説明図。
【図１４】従来のシール部の粉末シール形成の説明図で、（イ）で粉末シール片を凹部に挿入し、（ロ）で取り付けた状態を示す図。
【図１５】従来の粉末シール片をシール部に取り付けた一部切断正面図。
【図１６】図１５のＧ−Ｇ線断面図。
【符号の説明】
Ａ粉末シール片（原材Ｅを設定幅に切断して設けた）
Ｂテフロンフェルトシートと接着フィルムを一体的に接着したシート
Ｃ発泡プラスチックシートと両面粘着フィルムの片面を粘着したシート
ＤシートＢとシートＤの一部分（例、一側縁）を接着したシート
ＥシートＤを成形用型でＵ形、Ｃ形、Ｊ形、Ω形等に成形して設けた粉末シール片の原材
ａ従来の粉末シール片
１回転軸
２粉末
３軸受部
４側板
５シール部
５ａ凹部
６発泡プラスチックシート
７両面粘着フィルム
７′ 剥離紙
８テフロンフェルトシート
９接着フィルム
１０皺（しわ）
１１成形用型
１１ａ雄型
１１ｂ雌型
１２一部分（例、一側縁）接着
１３全面接着[0001]
[Industrial application fields]
The present invention provides a powder seal piece of a rotating shaft, for example, a powder seal piece as described in Japanese Patent Application Laid-Open No. 5-181354, entitled “Rotary shaft powder seal piece holder” (Applicant's patent application). The present invention relates to a manufacturing method characterized in that it can be manufactured accurately, simply and quickly, and can be provided at low cost, and also relates to a powder seal piece manufactured by the manufacturing method.
[0002]
[Prior art and its problems]
At present, in copiers, fax machines, printers, etc., toner cartridges, etc., in which rotating shafts such as a magnet roller and a transfer roller are set in a rectangular box-like case filled with toner (eg, carbon fine powder) are widely used. However, in order to prevent the powder 2 adhering to the peripheral surface of the rotary shaft 1 from being mixed into the bearing portion 3 and hindering rotation due to long-term use, the inner side of the bearing portion 3 (for example, in the toner tank) The left right plate 4) is provided with a seal portion 5 for sealing the powder 2 so that the powder does not leak from the seal portion 5 to the bearing portion 3 side. (See FIGS. 15 and 16)
[0003]
The seal portion 5 is formed with a U-shaped concave portion 5a for fitting and attaching the rotary shaft 1 from the front side or the upper surface side of a toner case or the like, and powder that seals powder leakage to the inner peripheral surface of the concave portion 5a. The seal piece a is integrally bonded with a double-sided adhesive film. (See Figure 14)
[0004]
The powder seal piece a has excellent elasticity such as its elasticity, extremely low frictional resistance, excellent durability, and the function that the fibers intertwined with high density effectively prevent the penetration of fine powder. Uses Teflon felt that combines the above characteristics.
Further, since the Teflon felt is extremely expensive as it is said to be 10,000 yen with a 10,000 yen bill size, and the price increases as the thickness increases, the powder seal piece a is made of another cushioning material (for example, foamed). Usually, it is manufactured in combination with plastic, normal felt, etc.).
[0005]
The powder seal piece a is slightly different depending on the manufacturer. For example, the powder seal piece a is formed on a back surface of a laminate formed by bonding a foamed plastic piece or the like to a Teflon felt piece having a width of about 5 mm, a length of about 50 mm, and a thickness of about 1 to 5 mm. One side of the double-sided adhesive film 7 is adhered (the release paper 7 'is adhered to the other side), and the powder seal piece a is placed on the inner peripheral surface of the recess 5a of the seal part 5 in addition to the double-sided adhesive film 7 It is attached by adhering the direction (peeling the release paper 7 ') (see Fig. 14)
Conventionally, the above-mentioned powder seal piece a has been attached manually at the site of user maintenance, repair, etc., and the resolution of its inefficiency has been the biggest issue.
That is, the release paper 7 'of the double-sided adhesive tape 7 of the powder seal piece a is peeled off and adhered to the inner peripheral surface of the recess 5a. At this time, the powder seal piece a is attached to the rotary shaft 1 in order to prevent powder leakage. The powder seal piece a is pressed and adhered to the inner peripheral surface of the concave portion 5a with the fingertip of the operator so that the peripheral surface is well adapted and adhered.
However, the crease 10 is inevitably moved to the inner surface side of the powder seal piece a and becomes uneven, and even if it is handled and corrected with the fingertips, it does not become smooth, and there are many variations depending on the degree of skill. There were difficulties. (See (a) and (b) in FIG. 14)
[0006]
OBJECT OF THE INVENTION
Therefore, the powder seal piece according to the above patent application is obtained by adhering Teflon felt and elastic foamed plastic, and adhering one side of the double-sided adhesive tape to the back side of the foamed plastic (adhering release paper 7 'to the other side). A laminated shaft, and provided with a powder seal piece of the rotating shaft, which is configured in a U-shape or the like corresponding to the shape of the concave portion of the seal portion.
With the U-shaped powder seal piece slightly recessed, it is inserted into the substantially circular or semicircular recess of the seal portion of the rotating shaft of the toner case or the like, and the substantially circular or semicircular recess of the seal portion is inserted. The above-mentioned conventional problems have been solved by attaching them to the inner surface with a double-sided adhesive tape.
[0007]
However, in order to produce the powder seal piece of the rotating shaft according to the above-mentioned patent application uniformly and with high precision and to provide a large amount at a low cost, there are the following problems.
[0008]
The first problem was how the Teflon felt sheet and the foamed plastic sheet could be firmly bonded to each other so that they would not be peeled off even when used as a sealing material for a long period of time.
For example, the most common means is to adhere both with a double-sided adhesive tape or film. In this case, it is easy to peel off, misaligns, and deteriorates over time. It cannot be durable.
Therefore, an adhesive film made of a heat-fusible synthetic resin that melts by heating and exhibits a strong adhesive force and returns to the original film state when cooled is optimal.
[0009]
However, Teflon felt is resistant to heat, but it is difficult to bond to other materials. On the other hand, foamed plastics are easily bonded to other materials using synthetic resin adhesives, but they are weak against heat. There is a problem that it changes quality and melts at low temperatures.
Therefore, when the adhesive film is interposed between the Teflon felt sheet and the foamed plastic sheet and heated and pressed, the adhesive film and the Teflon felt sheet do not adhere at the temperature at which the adhesive film melts and adheres well to the foamed plastic sheet. .
However, when the temperature is raised until the Teflon felt sheet and the adhesive film are satisfactorily bonded, there is a problem that is extremely difficult to solve, that is, the foamed plastic sheet is altered and melted.
[0010]
The second problem is how to prevent wrinkles from forming on the inner surface of the Teflon felt when the Teflon felt sheet and the foamed plastic sheet are formed into a U shape, C shape, J shape, or other shapes. It adhered to the foamed plastic smoothly.
For example, from the beginning, a state in which the entire surface of the Teflon felt sheet and the foamed plastic sheet are integrally bonded, or a state in which the Teflon felt sheet and the foamed plastic sheet are simply polymerized are U-shaped, G-shaped, J-shaped, When pressure and heat molding is performed with a molding die such as Ω type, the inner surface of the Teflon felt sheet is always wrinkled. (See Figure 14)
[0011]
[Problems solved by the invention]
In the present invention, the first problem is as follows. First, the Teflon felt sheet and the adhesive film are integrally bonded by heating and pressurizing at a high temperature that does not cause the foamed plastic sheet to be altered and melted, and then integrally bonded. The problem is solved by polymerizing the foamed plastic sheet, the foamed plastic sheet is not altered or melted, but the adhesive film is heated and pressurized at a temperature that melts, and the two are bonded together.
[0012]
The second problem is that a Teflon felt sheet and an adhesive film are integrated and a part of a foamed plastic sheet is bonded under pressure and heat, and this is applied to a mold for molding between male and female molds. Pressed to spread and handle so as not to cause wrinkles based on the part that was previously bonded by pressing, and tightly installed the Teflon felt sheet on the inner surface of the U-shaped foamed plastic via an adhesive film, By heating, the Teflon felt sheet is integrally bonded without causing wrinkles and is formed into a U shape or the like.
[0013]
[Means for Solving the Problem 1]
"Production method of powder seal piece of rotating shaft"
That is, in the present invention, an adhesive film made of a heat-melting synthetic resin is polymerized on one side of a Teflon felt sheet having a set width and length, and this is heated and pressurized at a temperature higher than the temperature at which the foamed plastic sheet changes and melts. The sheet B is provided by integrally bonding the two by heating and melting the adhesive film,
[0014]
Adhering one side of the double-sided adhesive film to one side of the foamed plastic sheet of the set width and length and providing the sheet C leaving the release paper on the other side as it is,
[0015]
The sheet B and the sheet C are cut to form a strip or a band having a set width and length, and the adhesive film surface of the sheet B and the foamed plastic sheet surface of the sheet C are polymerized, and a part of the sheet C is formed. The foamed plastic sheet is heated and pressed at a temperature at which the foamed plastic sheet does not change and melt, and the adhesive film is bonded by heating and melting to provide a sheet D.
[0016]
Next, the above-mentioned sheet D is set in a press-molding die comprising male and female dies such as U-shaped, C-shaped, J-shaped, and Ω-shaped cross sections, and the inner surface of the Teflon felt sheet of the sheet B between the male and female dies. In order not to cause wrinkles on the side, the part that has been pre-bonded is spread as a starting point and pressed to handle and handle, and the foamed plastic sheet is heated at a temperature that does not change or melt, and the adhesive film heats and melts sheet B. Molded into U-shaped, C-shaped, J-shaped, Ω-shaped, etc. while integrally adhering to the foamed plastic sheet of sheet C, removed from the molding mold, and cross-sectional U-shaped, C-shaped, J-shaped, Ω Providing raw material E of powder seal pieces of shape, etc.
[0017]
Cut the raw material E to the set width or cut to the set width while leaving the release paper of the sheet C, and rotate the rotating shaft such as U shape, C shape, J shape, Ω shape, etc. The problem is solved by the method of manufacturing the powder seal piece of the rotating shaft, which is provided with the powder seal piece A.
[0018]
[Means 2 for solving the problem]
"Powder seal piece of rotating shaft"
The present invention is a sheet B provided by integrally bonding a heat-meltable synthetic resin adhesive film on one side of a Teflon felt sheet,
[0019]
Sheet C provided by adhering one side of the double-sided adhesive film to one side of the foamed plastic sheet and leaving the release paper on the other side as it is,
[0020]
A sheet D provided by polymerizing the sheet B and the sheet C on the adhesive film surface of the sheet B and the foamed plastic sheet surface of the sheet C, and bonding a part thereof by heating and melting the adhesive film;
[0021]
The above sheet D is set in a press-molding die composed of male and female dies such as U-shaped, C-shaped, J-shaped, and Ω-shaped cross sections, heated and pressed between the male and female dies, and the sheet is obtained by heating and melting the adhesive film. B is formed in U-shape, C-shape, J-shape, Ω-shape, etc. while integrally bonding to the foamed plastic sheet surface of the sheet C, and is removed from the molding die. Raw material E of powder seal pieces such as J type and Ω type,
[0022]
U-shaped, C-shaped, J-shaped, Ω-shaped, etc. provided by cutting the raw material E to the set width or by cutting to the set width with the release paper of the sheet C left. The problem is solved by the powder seal piece of the rotating shaft.
[0023]
【Example】
An adhesive film 9 made of a heat-fusible synthetic resin is polymerized on one side of a Teflon felt sheet 8 having a set width and length, and this is heated and pressed at a temperature higher than the temperature at which the foamed plastic sheet 6 is altered and melted. The sheet B is provided by integrally bonding the two by heating and melting (FIG. 4).
[0024]
Adhering one side of the double-sided pressure-sensitive adhesive film 7 to one side of the foamed plastic sheet 6 having a set width and length, and providing the sheet C leaving the release paper 7 'on the other side as it is (FIG. 5)
[0025]
The sheet B and the sheet C are cut into a strip shape or a band shape having a set width and length, and the adhesive film 9 surface of the sheet B and the foamed plastic sheet 6 surface of the sheet C are polymerized, and a part 12 is formed. The foamed plastic sheet 6 of the sheet C is heated and pressed at a temperature at which the foamed plastic sheet 6 does not change and melt, and is bonded by heating and melting the adhesive film 9 to provide the sheet D (FIGS. 6 and 7).
[0026]
Next, the above-mentioned sheet D is set in a press-molding die 11 composed of male and female dies such as U-shaped, C-shaped, J-shaped, and Ω-shaped cross sections, and the Teflon of the sheet B is placed between the male and female dies 11a and 11b. To prevent wrinkles 10 from forming on the inner surface side of the felt sheet 8, the adhesive sheet is pressed so that the pre-bonded portion 12 is spread out and used for handling, and the foamed plastic sheet 6 is heated at a temperature at which the foamed plastic sheet 6 does not change or melt. The sheet 9 is molded into a U-shape, C-shape, J-shape, Ω-shape, etc. while the sheet B is integrally bonded to the foamed plastic sheet 6 of the sheet C by heating and melting the film 9, and is removed from the molding die 11 and crossed. The raw material E of the powder seal piece holder A of surface U shape, C shape, J shape, Ω shape, etc. is provided (FIGS. 8 to 9 and FIGS. 10 to 13).
[0027]
Cut the raw material E to the set width, or cut to the set width while leaving the release paper 7 'of the sheet C, and rotate the U shape, C shape, J shape, Ω shape, etc. This is a method for manufacturing a powder seal piece A for a rotary shaft, in which a powder seal piece A for a shaft is provided, and is a powder seal piece A for a rotary shaft manufactured by the manufacturing method. (FIGS. 1, 2 and 3)
[0028]
Note that the sheet B is formed into a strip or strip having a set width and length by cutting an adhesive film on one side of a Teflon felt sheet having a set width and length, or a preset width. In addition, an adhesive film of the same shape and the same size may be provided on one side of a Teflon felt sheet formed in a strip shape or a strip shape.
[0029]
Further, the sheet C adheres one side of the double-sided pressure-sensitive adhesive film to one side of the foamed plastic sheet having a set width and length, and leaves the other side of the release paper as it is, and cuts it into a strip shape having a set width and length or Adhere one side of a double-sided adhesive film of the same shape and size to one side of a foamed plastic sheet that has been formed into a strip shape or formed in a strip shape or strip shape with a preset width and length in advance and leave the release paper on the other side as it is Provided or optional.
[0030]
In addition, the foamed plastic sheet is formed on the outer peripheral surface of the Teflon felt sheet when the foamed plastic sheet is formed wider than the Teflon felt sheet in advance. Wrap it so that it finishes well without over- and under-width dimensions. (See FIGS. 10 to 13)
[0031]
[Means 3 for solving the problem]
"Adhesion between Teflon felt and foamed plastic"
In the present invention, the Teflon felt and the foamed plastic are firmly and integrally bonded by fusion bonding of an adhesive film made of a heat-melting synthetic resin.
First, the Teflon felt and adhesive film are heated and pressurized at a high temperature above which the plastic foam changes and melts, and the two are bonded together.
Next, polymerize the Teflon felt and adhesive film integrally bonded to the foamed plastic with the adhesive film in the middle, and the foamed plastic will not be altered or melted. The problem has been solved by a method of bonding Teflon felt and foamed plastic, in which the two are bonded together.
[0032]
[Means 4 for solving the problem]
"Method of bonding and molding Teflon felt and foamed plastic"
In the present invention, the Teflon felt and the foamed plastic are firmly and integrally bonded by fusion bonding of an adhesive film made of a heat-melting synthetic resin, and formed into a U shape or other shape by a press mold.
First, the Teflon felt and adhesive film are heated and pressurized at a high temperature above which the plastic foam changes and melts, and the two are bonded together.
Next, the above-mentioned Teflon felt and adhesive film integrally bonded to the foamed plastic are polymerized with the adhesive film in the middle, and the foamed plastic is not altered or melted at a part, for example, one side edge. After heating and pressurizing at the melting temperature and bonding them together, the foamed plastic will not be altered or melted by the mold, and the adhesive film will be heated and heated at the melting temperature to bond them together. At the same time, the problem is solved by the bonding and molding method of Teflon felt and foamed plastic, which are formed into a U shape and other shapes.
[0033]
【effect】
After the adhesive film is bonded to the Teflon felt sheet by heating and pressurizing at a high temperature, the foamed plastic sheet and the foamed plastic sheet are bonded together by heating and pressing at a lower temperature than the above. However, it is possible to produce a powder seal piece with excellent durability that does not peel off.
[0034]
When molding into U-shaped, C-shaped, J-shaped, Ω-shaped, etc., there is a problem that wrinkles occur on the inner surface side of the Teflon felt sheet. However, in the present invention, a part of the Teflon felt sheet and the foamed plastic sheet are bonded in advance. The Teflon felt sheet is pressed so that it does not cause wrinkles between the male and female molds, and is polymerized in a state free from wrinkles. Therefore, the powder seal piece is smooth and free from powder leakage, so that an excellent powder seal piece can be produced.
[0035]
Also, if the foamed plastic sheet is made wider than the Teflon felt sheet in advance, it will foam on the outer surface of the Teflon felt sheet when it is molded into a U, C, J, or Ω shape. A plastic sheet can be wound around it, so that it can be finished well without overs and shorts. (See FIGS. 10 to 13)
[0036]
When a Teflon felt sheet and a foamed plastic sheet are polymerized into a U-shaped, C-shaped, J-shaped, or Ω-shaped product by pressurizing and heating them with a press mold, they are pressurized between the male and female molds without wrinkles Since it was heated and bonded in a state of polymerization and bending into a U shape, C shape, J shape, Ω shape, etc., the shape of the U shape, C shape, J shape, Ω shape, etc. after release There is an excellent effect that can be finished into an unchanging and strong one without return.
[Brief description of the drawings]
FIG. 1 is a front view, a plan view, and a right side view of a U-shaped rotary shaft powder seal piece manufactured by the method of the present invention.
FIG. 2 is an enlarged sectional view taken along line FF in FIG.
3 is a front view, a plan view, and a right side view of a J-shaped rotary shaft powder seal piece manufactured by the method of the present invention. FIG.
FIG. 4 is a cross-sectional view of a sheet B in which a Teflon felt sheet for a powder seal piece and an adhesive film are integrally bonded.
FIG. 5 is a cross-sectional view of a sheet C in which one side of a foam plastic sheet for a holder portion and a double-sided adhesive film is adhered.
FIG. 6 is a cross-sectional view of a sheet D provided by bonding a part (eg, one side edge) of the sheet B and the sheet C.
7 is a plan view of the sheet D in FIG. 6. FIG.
FIG. 8 is an explanatory cross-sectional view in which a raw material E is provided by press-heating and molding a sheet D with a molding die, and shows a state before molding.
FIG. 9 is an explanatory cross-sectional view in which a raw material E is provided by press-heating and molding a sheet D with a molding die, and a view showing molding.
10 is an explanatory view showing the order in which a sheet D is formed into a U-shaped raw material E by the forming die shown in FIG.
11 is an explanatory view showing the next molding state of FIG.
12 is an explanatory view showing the next molding state of FIG. 11. FIG.
FIG. 13 is an explanatory view showing a state of being molded into a U-shaped raw material E.
FIG. 14 is an explanatory view of forming a powder seal of a conventional seal portion, and shows a state in which a powder seal piece is inserted into a recess in (A) and attached in (B).
FIG. 15 is a partially cut front view in which a conventional powder seal piece is attached to a seal portion.
16 is a cross-sectional view taken along line GG in FIG.
[Explanation of symbols]
A Powder seal piece (provided by cutting raw material E into set width)
B Sheet T in which a Teflon felt sheet and an adhesive film are integrally bonded C Sheet D in which a foamed plastic sheet and one side of a double-sided adhesive film are adhered to each other Sheet B and a sheet E in which a part (eg, one side edge) of the sheet D is adhered The raw material of the powder seal piece provided by molding it into a U-shape, C-shape, J-shape, Ω-shape, etc. with a molding die a Conventional powder seal piece 1 Rotating shaft 2 Powder 3 Bearing part 4 Side plate 5 Seal part 5a Recess 6 Foamed plastic sheet 7 Double-sided adhesive film 7 'Release paper 8 Teflon felt sheet 9 Adhesive film 10 Wrinkle
11 Mold 11a Male mold 11b Female mold 12 Partial (eg, one side edge) adhesion 13 Whole surface adhesion

Claims

Adhesive film made of heat-melting synthetic resin is polymerized on one side of a set width and length of Teflon felt sheet, and it is heated and pressurized at a temperature higher than the temperature at which the foamed plastic sheet changes and melts, and the adhesive film is heated and melted. The two sheets are bonded together to provide a sheet B,
Adhering one side of the double-sided adhesive film to one side of the foamed plastic sheet of the set width and length and providing the sheet C leaving the release paper on the other side as it is,
The sheet B and the sheet C are cut to form a strip or a band having a set width and length, and the adhesive film surface of the sheet B and the foamed plastic sheet surface of the sheet C are polymerized, and a part of the sheet C is formed. The foamed plastic sheet is heated and pressed at a temperature at which the foamed plastic sheet does not change and melt, and the adhesive film is bonded by heating and melting to provide a sheet D.
Next, the above-mentioned sheet D is set in a press-molding die comprising male and female dies such as U-shaped, C-shaped, J-shaped, and Ω-shaped cross sections, and the inner surface of the Teflon felt sheet of the sheet B between the male and female dies. In order not to cause wrinkles on the side, the part that has been pre-bonded is spread as a starting point and pressed to handle and handle, and the foamed plastic sheet is heated at a temperature that does not change or melt, and the adhesive film heats and melts sheet B. Molded into U-shaped, C-shaped, J-shaped, Ω-shaped, etc. while integrally adhering to the foamed plastic sheet of sheet C, removed from the molding mold, and cross-sectional U-shaped, C-shaped, J-shaped, Ω Providing raw material E of powder seal pieces of shape, etc.
Cut the raw material E to the set width or cut to the set width while leaving the release paper of the sheet C, and rotate the rotating shaft such as U shape, C shape, J shape, Ω shape, etc. A powder seal piece A is provided.
A method for producing powder seal pieces for rotating shafts.

The sheet B is obtained by adhering an adhesive film to one side of a Teflon felt sheet having a set width and length, and then cutting it to form a strip or a band having a set width and length, or by setting a preset width and length in advance. It is provided by adhering an adhesive film of the same shape and size to one side of a Teflon felt sheet formed in the shape of a strip or strip,
Further, the sheet C adheres one side of the double-sided pressure-sensitive adhesive film to one side of the foamed plastic sheet having a set width and length, and leaves the other side of the release paper as it is, and cuts it into a strip shape having a set width and length or Adhere one side of a double-sided adhesive film of the same shape and size to one side of a foamed plastic sheet that has been formed into a strip shape or formed in a strip shape or strip shape with a preset width and length in advance and leave the release paper on the other side as it is Are provided,
The manufacturing method of the powder seal piece of the rotating shaft of Claim 1.

An adhesive film made of a heat-melting synthetic resin is integrally bonded to one side of a Teflon felt sheet to provide a sheet B ,
Adhering one side of the double-sided adhesive film to one side of the foamed plastic sheet and leaving the release paper on the other side as it is , providing the sheet C ,
The sheet B and the sheet C are polymerized on the adhesive film surface of the sheet B and the foamed plastic sheet surface of the sheet C, and a part thereof is adhered by heating and melting the adhesive film to provide the sheet D.
The above sheet D is set in a press-molding die composed of male and female dies such as U-shaped, C-shaped, J-shaped, and Ω-shaped cross sections, heated and pressed between the male and female dies, and the sheet is obtained by heating and melting the adhesive film. U-shaped with integrally bonded to the foamed plastic sheet surface of the sheet B C, C-shaped, J-shaped, molded into Ω shape or the like, the horizontal cross-sectional U-shaped remove it from the mold, C-shaped, J-shaped The raw material E for powder seal pieces such as Ω type is provided ,
Cut the raw material E to the set width or cut to the set width while leaving the release paper of the sheet C, and rotate the rotating shaft such as U shape, C shape, J shape, Ω shape, etc. A powder seal piece A is provided.
The manufacturing method of the powder seal piece of the rotating shaft of Claim 1.

When Teflon felt and foamed plastic are bonded firmly and integrally by heat-melting adhesive film made of heat-melting synthetic resin,
First, Teflon felt and adhesive film are polymerized, and the foamed plastic is altered and melted and heated and pressurized at a temperature higher than it melts.
Next, polymerize the Teflon felt and adhesive film integrally bonded to the foamed plastic with the adhesive film in the middle, and the foamed plastic will not be altered or melted. , Both are bonded together,
Bonding method of Teflon felt and foamed plastic.

Teflon felt and foamed plastic are firmly and integrally bonded by fusion bonding of an adhesive film made of a heat-meltable synthetic resin, and in addition to being molded into a U shape or other shape by a press mold,
First, while polymerizing the Teflon felt and the adhesive film, after heating and pressing at a temperature higher than the foamed plastic is altered and melted, the two are integrally bonded by heating and melting the adhesive film,
Next, the above-mentioned Teflon felt and adhesive film integrally bonded to the foamed plastic are polymerized with the adhesive film in the middle, and the foamed plastic is not altered or melted at a part, for example, one side edge. After heating and pressurizing at the melting temperature, the foamed plastic will not be altered or melted by the mold, and the adhesive film will be heated and heated at the melting temperature to bond them together and at the same time U shape It is designed to be molded into other shapes.
Bonding and molding method of Teflon felt and foamed plastic.