JP2015148285A - すべり軸受 - Google Patents
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- JP2015148285A JP2015148285A JP2014021718A JP2014021718A JP2015148285A JP 2015148285 A JP2015148285 A JP 2015148285A JP 2014021718 A JP2014021718 A JP 2014021718A JP 2014021718 A JP2014021718 A JP 2014021718A JP 2015148285 A JP2015148285 A JP 2015148285A
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Abstract
【解決手段】金属製基材からなる軸受外周部2と、この摺動面となる表面に樹脂材料を用いて射出成形により一体に成形された樹脂層3とを有するすべり軸受1であって、上記樹脂材料が、射出成形可能なポリエチレン樹脂(A)を主成分とし、非射出成形性のフッ素樹脂(B)を含む材料であり、上記樹脂材料において、フッ素樹脂(B)が、PE樹脂(A)とフッ素樹脂(B)との合計質量に対して10質量%をこえ、40質量%以下含まれる。
【選択図】図1
Description
ベース樹脂;
(A)射出成形可能なPE樹脂[三井化学社製の商品名リュブマーL5000P](密度(ASTM D 1505):966kg/m3、MFR(JIS K 7210(190℃、10kgf)):2g/10分)
充填剤;
(B)再生PTFE樹脂(非射出成形性のフッ素樹脂)[喜多村社製の商品名KTL−610](平均粒子径(レーザ回析法):12μm)
(C)多孔質シリカ[AGCエスアイテック社製の商品名サンスフェアH53]
(D)シリコーン油[信越化学工業社製の商品名KF−96H]
これら樹脂材料を用いて表1に示す配合割合で配合したものを2軸押し出し装置で溶融混練し、成形用ペレットを作成した。なお、比較例1については、多孔質シリカとシリコーン油との混合比を1:3(質量換算)とする混合物(含油多孔質シリカ)を得て、この混合物を樹脂に配合したものを2軸押し出し装置で溶融混練し、成形用ペレットを作成した。各樹脂材料を用いて試験片を射出成形で作成し、物性評価を行なった。試験方法および物性結果を表1に併記する。
サイズ:φ8.5mm(内径)、φ16mm(外径)、5mm(高さ)
成分:銅(0.5〜2.5質量%)、その他(3質量%以下)、鉄(残量)
製造工程:材料粉末ブレンド、フォーミング、シンタリング、サイジング、防錆・乾燥
金型内に上記形状の焼結外環を挿入し、上記で得られた成形用ペレットを用いてトンネルゲートを経て、下記条件でインサート成形を行なった。なお、樹脂層の厚みは0.25mmである。なお、実施例、比較例のいずれも射出成形可能であった。
完成品サイズ:φ8mm(内径)、φ16mm(外径)、5mm(高さ)
金型温度:120℃
成形温度:250℃
射出圧力:100〜140MPa
下記表2の条件で摩擦摩耗試験を行なった。相手材軸とすべり軸受の隙間は、20μm(20℃で測定)とした。また、摩耗係数は下記式により算出した。この摩擦摩耗試験を複数回行ない、PV値と摩耗係数との関係を調べた。結果を図3に示す。なお、図3は、PV値を横軸に、摩耗係数を縦軸にしてプロットした図である。
k=δ/(F×D)
k:摩耗係数 mm/(N×m) 定義:単位仕事量当たりの真円度増加量
F:ラジアル荷重 N
D:総滑り距離 m
δ:摩耗量(真円度の増加量) mm δ=δ1−δ0
δ0:試験前の供試軸受の内径2断面真円度(半径法)の平均値
δ1:試験後の供試軸受の内径2断面真円度(半径法)の平均値
2 軸受外周部
3 樹脂層
4 溝
5 ゲート痕
Claims (5)
- 金属製基材と、この基材の摺動面となる表面に樹脂材料を用いて射出成形により一体に成形された樹脂層とを有するすべり軸受であって、
前記樹脂材料が、射出成形可能なポリエチレン樹脂(A)を主成分とし、非射出成形性のフッ素樹脂(B)を含む材料であり、
前記樹脂材料において、前記フッ素樹脂(B)が、前記ポリエチレン樹脂(A)と前記フッ素樹脂(B)との合計質量に対して10質量%をこえ、40質量%以下含まれることを特徴とするすべり軸受。 - 前記フッ素樹脂(B)は、再生ポリテトラフルオロエチレン樹脂であることを特徴とする請求項1記載のすべり軸受。
- 前記フッ素樹脂(B)は、前記樹脂材料に平均粒子径5〜50μmの粉末状で配合されたことを特徴とする請求項1または請求項2記載のすべり軸受。
- 前記ポリエチレン樹脂(A)は、JIS K 7210に基づき、荷重10kg、190℃で測定したときのMFRが1〜30g/10分であることを特徴とする請求項1、請求項2または請求項3記載のすべり軸受。
- 前記すべり軸受は、面圧(P)と滑り速度(V)を乗じたPV値が、5MPa・m/min.をこえる条件で使用される軸受であることを特徴とする請求項1から請求項4のいずれか1項記載のすべり軸受。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014021718A JP2015148285A (ja) | 2014-02-06 | 2014-02-06 | すべり軸受 |
EP15746685.5A EP3104029A4 (en) | 2014-02-06 | 2015-02-06 | Plain bearing |
US15/117,408 US20160341251A1 (en) | 2014-02-06 | 2015-02-06 | Sliding bearing |
CN201580007375.3A CN105980723A (zh) | 2014-02-06 | 2015-02-06 | 滑动轴承 |
PCT/JP2015/053335 WO2015119231A1 (ja) | 2014-02-06 | 2015-02-06 | すべり軸受 |
Applications Claiming Priority (1)
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JP2014021718A JP2015148285A (ja) | 2014-02-06 | 2014-02-06 | すべり軸受 |
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JP2015148285A true JP2015148285A (ja) | 2015-08-20 |
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JP2014021718A Ceased JP2015148285A (ja) | 2014-02-06 | 2014-02-06 | すべり軸受 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019124356A (ja) * | 2018-01-17 | 2019-07-25 | Ntn株式会社 | 滑り軸受、軸受装置、および画像形成装置 |
WO2019142843A1 (ja) * | 2018-01-17 | 2019-07-25 | Ntn株式会社 | 滑り軸受、軸受装置、および画像形成装置 |
JP2019191452A (ja) * | 2018-04-27 | 2019-10-31 | 株式会社横井製作所 | 軸受け部材 |
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