JPS63284254A - Sliding member for electric appliance - Google Patents
Sliding member for electric applianceInfo
- Publication number
- JPS63284254A JPS63284254A JP11816987A JP11816987A JPS63284254A JP S63284254 A JPS63284254 A JP S63284254A JP 11816987 A JP11816987 A JP 11816987A JP 11816987 A JP11816987 A JP 11816987A JP S63284254 A JPS63284254 A JP S63284254A
- Authority
- JP
- Japan
- Prior art keywords
- molding
- component
- polyacetal
- weight
- sliding
- 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.)
- Pending
Links
- 229930182556 Polyacetal Natural products 0.000 claims abstract description 13
- 229920006324 polyoxymethylene Polymers 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 10
- 239000006229 carbon black Substances 0.000 claims abstract description 7
- 229920000098 polyolefin Polymers 0.000 claims abstract description 6
- 229920005989 resin Polymers 0.000 claims abstract description 5
- 239000011347 resin Substances 0.000 claims abstract description 5
- 238000000465 moulding Methods 0.000 abstract description 9
- 229920001903 high density polyethylene Polymers 0.000 abstract description 2
- 239000004700 high-density polyethylene Substances 0.000 abstract description 2
- 239000012778 molding material Substances 0.000 abstract description 2
- 238000005299 abrasion Methods 0.000 abstract 2
- 229940063583 high-density polyethylene Drugs 0.000 abstract 1
- 229920001577 copolymer Polymers 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 4
- 239000005977 Ethylene Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 229920001519 homopolymer Polymers 0.000 description 2
- 239000003273 ketjen black Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- 239000004711 α-olefin Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920009382 Polyoxymethylene Homopolymer Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000006231 channel black Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000006232 furnace black Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 125000005704 oxymethylene group Chemical group [H]C([H])([*:2])O[*:1] 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 239000006234 thermal black Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
（発明の利用分野）
本発明は、電気機器の歯車、軸受、カム等摺動部材に関
し、更に詳しくは、低騒音性のプラスチック摺動部材に
関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention relates to sliding members such as gears, bearings, and cams for electrical equipment, and more particularly to low-noise plastic sliding members.
（発明の背景）
近年、プラスチックは、成形技術の向上、新材料の開発
等により精度及び性能が向上し、各種家電品、情報機器
等に幅広く使われている。(Background of the Invention) In recent years, the precision and performance of plastics has improved due to improvements in molding technology and the development of new materials, and they are now widely used in various home appliances, information devices, and the like.
特にプラスチックギヤは、金属ギヤに比べて、剛性や強
度といった点では劣るが、多量生産によるコストダウン
、耐食性、騒音軽減といった点から伝達トルクの少ない
ギヤや小型のギヤを主体に汎く使用されている。In particular, plastic gears are inferior to metal gears in terms of rigidity and strength, but they are widely used mainly for gears with low transmission torque and small gears because of their cost reduction due to mass production, corrosion resistance, and noise reduction. There is.
精密小型ギヤの成形材料としては、成形精度、疲労強度
等ギヤ用材料に要求される特性のバランスが比較的優れ
たポリアセタールが多く使用されている。As a molding material for small precision gears, polyacetal is often used because it has a relatively excellent balance of properties required for gear materials, such as molding accuracy and fatigue strength.
しかしながら、このポリアセタールギャモ比較的、高負
荷及び高速回転するギヤに用いると騒音か大きくなる。However, when this polyacetal gammon is used in a gear that rotates under a relatively high load and at a high speed, it becomes noisy.
各種家電品や情報機器等は低騒音化が強く望まれており
、ギヤ、軸受、カム等の摺動部の成形精度、耐摩耗性、
摺動潤滑性等の向上が要求されている。There is a strong desire for low noise in various home appliances and information devices, and it is important to improve the molding accuracy, wear resistance, and
Improvements in sliding lubricity, etc. are required.
（発明の概要）
本発明は特殊なプラスチック材料を精密成形することに
より、画期的な低騒音性を有する摺動部材を得ることを
目的とするものである。(Summary of the Invention) The object of the present invention is to obtain a sliding member having revolutionary low noise properties by precision molding a special plastic material.
更に詳しくは、下記成分（ａ）〜（ｃ）からなる樹脂材
料の成形体であることを峙徴とする電気機器用摺動部材
を提供するものでろる。More specifically, the present invention provides a sliding member for electrical equipment which is characterized by being a molded body of a resin material comprising the following components (a) to (c).
成分（ａ） ポリアセタール ６０〜５４ｉｆＨ１ｓ
、成分（ｂ） ポリオレフィン ４〜３０重量部、
成分（ｃ）カーボンブラック ２〜１０重量部。Component (a) Polyacetal 60-54ifH1s
, component (b) polyolefin 4 to 30 parts by weight,
Component (c) carbon black 2 to 10 parts by weight.
本発明において摺動部材とは、電気機器の部材でろって
、駆動きれて摺動が生じる部分の部材であり、ギヤ、軸
受、カム、レバー等を云う。In the present invention, the sliding member refers to a member of an electrical device that is driven and slides, and includes gears, bearings, cams, levers, etc.
（発明の詳細な説明）
本発明で成分（ａ）として使用されるポリアセタールは
、ポリオキシメチレン単独重合体または主鎖の主体がオ
キシメチレン連鎖よりなる共重合体である。(Detailed Description of the Invention) The polyacetal used as component (a) in the present invention is a polyoxymethylene homopolymer or a copolymer whose main chain is mainly composed of oxymethylene chains.
成分（ｂ）であるポリオレフィンは、ポリエチレン（高
圧法低密度タイプ、中低工法高密度タイプ、直鎖低密度
タイプ）、ポリプロピレン、ポリブテン、ポリヘキセン
などのα−オレフィン単独重合体、およびエチレン・プ
ロピレン共重合体（ランダムタイプ、ブロックタイプ）
、エチレン・酢酸ビニル共重合体、プロピレン・エチレ
ン共重合体（ランダムタイプ、ブロックタイプ）、プロ
ピレン・エチレン・ブテン−１三元共重合体、無水マレ
イン酸クラフトポリプロピレンなどのα−オレフィンと
他のモノマーとの共重合体である。中でも密度が０．９
２０ ｔ／ｃｄ、好ましくは０．９４５ ｒ／ｃＩＩ以
上であるエチレン単独重合体、エチレンと他のモノマー
との共重合体が好ましい。The polyolefin that is component (b) includes polyethylene (high pressure method low density type, medium and low method high density type, linear low density type), α-olefin homopolymers such as polypropylene, polybutene, polyhexene, and ethylene/propylene copolymers. Polymer (random type, block type)
, ethylene/vinyl acetate copolymer, propylene/ethylene copolymer (random type, block type), propylene/ethylene/butene-1 terpolymer, maleic anhydride kraft polypropylene, and other α-olefins and other monomers. It is a copolymer with Among them, the density is 0.9
Preferred are ethylene homopolymers and copolymers of ethylene with other monomers, which have a molecular weight of at least 20 t/cd, preferably 0.945 r/cII.
成分（ｅ）は、伝熱性、摺動性を改良する成分であって
、成分（ｃ）として用いられるカーボンブラックは、フ
ァーネスブラック、アセチレンブラック、サーマルブラ
ック、チャンネルブラック等一般のカーボンブラックを
用いることができるが、導電性カーボンブラックが好ま
しく、特にＮ２吸着によるＢＩＴ式比表面積が８５０
ｍ” ／ ９以上の導電性カーボンブラック（ＫＢＩＣ
社ケッチェンブラックなどがこれに該当する）が特に好
ましい。Component (e) is a component that improves heat conductivity and sliding properties, and the carbon black used as component (c) is general carbon black such as furnace black, acetylene black, thermal black, and channel black. However, conductive carbon black is preferable, especially when the BIT formula specific surface area due to N2 adsorption is 850.
m” / 9 or more conductive carbon black (KBIC
Particularly preferred are Ketjenblack and others.
成分（ａ３ 、 （ｂ） 、 （ｅ）の分散形態として
、成分（ｅ）が成分（１））のドメインに実質的に包含
されているものが本発明において特に好ましい。In the present invention, the dispersion form of components (a3, (b), and (e)) in which component (e) is substantially included in the domain of component (1)) is particularly preferred.
配合割合は、成分（ａ）、成分の）及び成分（ｅ）の合
計を１００重量部として、成分（ａ）は９４〜６０重量
部、好ましくは８５〜６５重量部、成分（ロ）は、４〜
３０重量部、好ましくは１０〜２５重量部、成分（ｃ）
は、２〜１０重量部、好ましくは４〜８重量部である。The blending ratio is 94 to 60 parts by weight, preferably 85 to 65 parts by weight, and component (b), with the total of component (a), component (a), and component (e) being 100 parts by weight. 4～
30 parts by weight, preferably 10-25 parts by weight, component (c)
is 2 to 10 parts by weight, preferably 4 to 8 parts by weight.
成分（ｅ）のカーボンブラックの配合割合が２重量部未
満では組成物の伝熱性、潤滑性の発現が困難でめり摺動
性の改良効果が乏しい。一方力−ポンブラックの配合割
合が１０重量部を越えると成形加工性が不良となる。If the blending ratio of component (e) carbon black is less than 2 parts by weight, it is difficult for the composition to exhibit heat conductivity and lubricity, and the effect of improving sliding properties is poor. On the other hand, if the blending ratio of Riki-Pon black exceeds 10 parts by weight, moldability becomes poor.
成分（ｂ）のポリオレフィンの配合割合が４重量部未満
では摺動性の改良効果が乏しく、３０重量部を越えると
摺動性がかえって低下する。If the blending ratio of the polyolefin component (b) is less than 4 parts by weight, the effect of improving the sliding properties is poor, and if it exceeds 30 parts by weight, the sliding properties will actually decrease.
本発明は成分（ｅ）が成分（ｂ）のドメインに実質的に
包含されていることが望ましく、このようなモルフオロ
ジーを形成するためには成分（ａ）と成分（ｂ）の溶融
粘度を適正化することが有効である。具体的には１９０
℃２．１６Ｑ荷重において測定した成分（ａ）のＭＦＲ
（Ｘ）と（ｂ）成分のＭＦＲ（Ｙ）の比Ｘ／Ｙが０．２
〜２５の範囲に設定することが有効である。このような
ＭＦＲ比に成分（ａ）と成分（ｂ）とを設定した上で、
成分Φ）と成分（ｃ）とを予め溶融混練した後に、あら
たに成分（ａ）を混合し溶融混練するとさらに好ましい
。In the present invention, it is desirable that component (e) is substantially included in the domain of component (b), and in order to form such a morphology, the melt viscosity of component (a) and component (b) must be adjusted. It is effective to optimize it. Specifically 190
MFR of component (a) measured at ℃2.16Q load
The ratio X/Y of MFR (Y) of (X) and (b) component is 0.2
It is effective to set it in the range of ~25. After setting component (a) and component (b) to such an MFR ratio,
It is more preferable to melt and knead component (Φ) and component (c) in advance, and then to mix and knead component (a).
本発明の組成物には成分（ａ）〜（Ｃ）のほかに、各種
の補助成分を含むことができる。The composition of the present invention can contain various auxiliary components in addition to components (a) to (C).
例えば、各種安定剤、滑剤、着色剤、帯電防止剤、離燃
剤、あるいは、本発明効果を阻害しない程度の量の他の
熱可塑性樹脂を添加することができる。For example, various stabilizers, lubricants, colorants, antistatic agents, flame retardants, or other thermoplastic resins may be added in amounts that do not impede the effects of the present invention.
〔実施例〕
摺動部材用材料として次の成分（ａ）、 （ｂ）、 （
（りから成る組成物を溶融混練したポリアセタール系材
料のペレットを得た。[Example] The following components (a), (b), (
Pellets of polyacetal material were obtained by melt-kneading a composition consisting of (2).
（ａ） ポリアセタール ７２重ｌ５（ｂ
） 高密度ポリエチレン ２０重量シ（Ｃ）ケ
ッチェンブラック ８重量％該ペレットを射出
成形して径３０ＩＩＩＩの精密ギヤを得た。本ギヤ成形
体中の分散形態を解析した所、成分（ｅ）は実質的に成
分伽）のドメイン中に包含されていた。(a) Polyacetal 72 weight l5 (b
) High-density polyethylene 20% by weight (C) Ketjenblack 8% by weight The pellets were injection molded to obtain a precision gear with a diameter of 30III. Analysis of the dispersion form in this gear molded article revealed that component (e) was substantially included in the domain of component (e).
このようにして得られたギヤを同じ形状の金属ギヤ、ポ
リアセタールギヤと比較して次の方法により騒音テスト
を行った。The gear thus obtained was compared with a metal gear and a polyacetal gear of the same shape, and a noise test was conducted using the following method.
測定法としては、第１表に示す組合せのギヤーＡ、Ｂを
図１に示す様に、噛み合せ、一定回転数（７００ｒｐｍ
）、一定負荷（トルク２０＃・儒）をかけて駆動させ
、歯車から発生する摺動音を、マイクロホン１、騒音計
２及びＦＦＴアナライザー３で聴取し、騒音レベルを確
認した。As for the measurement method, the gears A and B of the combination shown in Table 1 are meshed as shown in Figure 1, and the rotation speed is constant (700 rpm).
), the gear was driven under a constant load (torque of 20 #f), and the sliding noise generated from the gear was listened to using microphone 1, sound level meter 2, and FFT analyzer 3, and the noise level was confirmed.
結果を表１に示した。表１から明らかなように、本発明
の特殊ゲラステックギヤは金属ギヤ、ポリアセタールギ
ヤに比較して騒音レベルが著しく小さかった。The results are shown in Table 1. As is clear from Table 1, the noise level of the special gelastic gear of the present invention was significantly lower than that of metal gears and polyacetal gears.
また、ポリアセタールと本発明材料を用いて板状のサン
プルを夫々成形し、鋼製の回転リングと所定圧で接触せ
しめ、リング摺動面の走行量１−当りのポリアセタール
及び本発明材料の摩耗量を測定した。In addition, plate-shaped samples were formed using polyacetal and the material of the present invention, and brought into contact with a rotating steel ring at a predetermined pressure. was measured.
その結果は、第２図の通りであった。The results were as shown in Figure 2.
表１Table 1
第１図は、ギヤーの騒音測定方法を示す説明図第２図は
耐摩耗性の測定結果を示すグラフである。
Ａ、Ｂ：ギヤー
１：マイクロホン
λ：騒音計
特許出願人 三菱油化株式会社
代理人 弁理士 長 谷 正 久
（ほか１名）FIG. 1 is an explanatory diagram showing a method for measuring gear noise. FIG. 2 is a graph showing measurement results of wear resistance. A, B: Gear 1: Microphone λ: Sound level meter Patent applicant Mitsubishi Yuka Co., Ltd. agent Patent attorney Masahisa Hase (and 1 other person)
Claims (1)
ることを特徴とする電気機器用摺動部材。 成分（ａ）ポリアセタール６０〜９４重量部、 成分（ｂ）ポリオレフィン４〜３０重量部、 成分（ｃ）カーボンブラック２〜１０重量部。 （但し、成分（ａ）〜（ｃ）の合計量は１００重量部と
する。）[Scope of Claims] A sliding member for electrical equipment, characterized in that it is a molded body of a resin material comprising the following components (a) to (c). Component (a) 60 to 94 parts by weight of polyacetal, Component (b) 4 to 30 parts by weight of polyolefin, and Component (c) 2 to 10 parts by weight of carbon black. (However, the total amount of components (a) to (c) shall be 100 parts by weight.)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11816987A JPS63284254A (en) | 1987-05-15 | 1987-05-15 | Sliding member for electric appliance |
| US07/187,843 US4873282A (en) | 1987-05-15 | 1988-04-29 | Polyacetal resin composition |
| EP88107157A EP0292746B1 (en) | 1987-05-15 | 1988-05-04 | Polyacetal resin composition and sliding part made therefrom |
| DE8888107157T DE3873616T2 (en) | 1987-05-15 | 1988-05-04 | POLYACETAL RESIN COMPOSITION AND SLIDING PARTS MADE THEREOF. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11816987A JPS63284254A (en) | 1987-05-15 | 1987-05-15 | Sliding member for electric appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63284254A true JPS63284254A (en) | 1988-11-21 |
Family
ID=14729825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11816987A Pending JPS63284254A (en) | 1987-05-15 | 1987-05-15 | Sliding member for electric appliance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63284254A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0266365A (en) * | 1988-08-31 | 1990-03-06 | Polyplastics Co | Low-noise gear |
| JP2002105279A (en) * | 2000-09-29 | 2002-04-10 | Univ Nihon | Polyacetal resin composition |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50159539A (en) * | 1974-06-17 | 1975-12-24 | ||
| JPS6140708A (en) * | 1984-07-31 | 1986-02-27 | ライオン株式会社 | Artificial seed |
-
1987
- 1987-05-15 JP JP11816987A patent/JPS63284254A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50159539A (en) * | 1974-06-17 | 1975-12-24 | ||
| JPS6140708A (en) * | 1984-07-31 | 1986-02-27 | ライオン株式会社 | Artificial seed |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0266365A (en) * | 1988-08-31 | 1990-03-06 | Polyplastics Co | Low-noise gear |
| JP2002105279A (en) * | 2000-09-29 | 2002-04-10 | Univ Nihon | Polyacetal resin composition |
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