CN107255120A - 耐高温ptfe推挤管材轴承及其制造方法 - Google Patents
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Abstract
本发明公开了一种耐高温PTFE推挤管材轴承及其制造方法,其中该耐高温PTFE推挤管材轴承,包括:内层结构及外层结构,其中,所述内层结构由以下材料按照重量比例制成:PTFE分散树脂65‑90份;PPS聚苯硫醚7‑20份;石墨粉3‑15份;加工助剂15‑30份;所述外层结构为含氟类热缩管。
Description
技术领域
本发明涉及高分子管材制造技术领域,且特别涉及一种耐高温PTFE推挤管材轴承及其制造方法。
背景技术
机械工业中使用的轴承一般分为滚动轴承和滑动轴承,滚动轴承已形成标准化、系列化生产。而滑动轴承则分为金属和塑料两类。塑料轴承相对于金属轴承,其质轻高强、耐腐蚀性更好,可以作为更好的耐磨、减摩材料,但其缺点是导热性不好,容易造成热量集聚导致热变形,这就限制了塑料轴承在高温环境、高速工况中的使用。
PTFE具有摩擦系数低、耐化学腐蚀性好、耐温性高的优点,是一种自润滑性材料,PTFE材料可以长期在260℃的工作环境中运行,满足对轴承测一般要求。但PTFE作为一种高分子材料,其高温下的蠕变不可避免,特别是在受力的情况下;实验表明纯PTFE材料其耐磨损性能远小于改性前的PTFE材料,这些在许多的文献资料中被证实。
发明内容
有鉴于此,本发明旨在解决现有技术中,利用PTFE材料制造的轴承,在高温下的蠕变不可避免、耐磨损性能降低等技术问题。
为解决上述热变形和磨损的问题,本发明开发了一种使用PTFE推挤管材的轴承制造方法。
该耐高温PTFE推挤管材轴承,包括:内层结构及外层结构,其中,所述内层结构由以下材料按照重量比例制成:PTFE分散树脂65-90份;PPS聚苯硫醚7-20份;石墨粉3-15份;加工助剂15-30份;所述外层结构为含氟类热缩管。
进一步的,所述PTFE分散树脂的粒径为400-650微米,表观密度为400-500ml/g,相对密度为2.10-2.17g/cm3。
进一步的,所述PPS聚苯硫醚的粒径为100微米以下。
进一步的,所述石墨粉的粉体直径在200微米以下。
进一步的,所述加工助剂为C7-C12的异构烷烃化合物。
进一步的,所述含氟聚合物收缩管材为PTFE热缩管或PFA热缩管。
本发明还提供一种耐高温PTFE推挤管材轴承的制造方法,包括以下步骤:
将PTFE分散树脂、PPS聚苯硫醚、石墨粉、加工助剂混合均匀,并密闭放置一段时间;
混匀后的物料经模具冷压推挤成型后,进一步挥发、烧结、冷却后得到内层PTFE管材;
将PTFE管材裁切为适当长度后,外层用含氟聚合物收缩管材进行包覆。
综上所述,本发明提供的耐高温PTFE推挤管材轴承及其制造方法,其生产效率较高,所生产的轴承不仅具有良好的耐高温性,而且热变形小,坚固耐磨,具有更长的使用寿命。
具体实施方式
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面结合实施例对本发明进行具体的描述。下面描述中的仅仅是本发明的一些实施例。对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些实施例获得其他的实施例。
本发明实施例提供的一种耐高温PTFE推挤管材轴承,其包括内层结构及外层结构,其中,所述内层结构由以下材料按照重量比例制成:PTFE分散树脂65-90份,其作为主要基材,起到减摩的作用;PPS聚苯硫醚7-20份,其主要作用是作为耐磨、耐高温填料;石墨粉3-15份,其主要的作用是耐磨和减轻蠕变填料;加工助剂15-30份,用于挤出加工,在烧结过程前挥发完全;所述外层结构为含氟类热缩管,收缩后对内层结构起到保护的作用,防止受热变形。
本发明实施例提供的耐高温PTFE推挤管材轴承,在实际的工业生产中,使用的PTFE轴承多是采用模压后进行机加工等后续工艺生产而成,采用分散PTFE树脂直接推挤烧结而成,避免了后续的二次加工,其效率高,仅在烧结完成后裁切及装配即可。且采用上述材料配比生产的轴承防止了热变形,具有更好的耐磨性能。
在本发明实施例中,所述PTFE分散树脂的粒径为400-650微米,表观密度为400-500ml/g,相对密度为2.10-2.17g/cm3。
在本发明实施例中,所述PPS聚苯硫醚的粒径为100微米以下,优选的75微米以下;
在本发明实施例中,所述石墨粉的粉体直径在200微米以下,优选100微米以下。
在本发明实施例中,所述加工助剂为C7-C12的异构烷烃化合物,用于挤出过程中的润滑剂,在烧结过程前会挥发完全,不会残留在产品中,其沸点为120-180℃。
在本发明实施例中,所述含氟聚合物收缩管材为PTFE热缩管或PFA热缩管。
本发明实施例还提供如上述实施例提供的耐高温PTFE推挤管材轴承的制造方法,包括以下步骤:
步骤S110将PTFE分散树脂、PPS聚苯硫醚、石墨粉、加工助剂混合均匀,并密闭放置一段时间;
步骤S120混匀后的物料经模具冷压推挤成型后,进一步挥发、烧结、冷却后得到内层PTFE管材;
步骤S130将PTFE管材裁切为适当长度后,外层用含氟聚合物收缩管材进行包覆。
实施例一:
1.配方:PTFE:75份,PPS 20份,石墨粉5份,加工助剂25份;在密闭的容器中搅拌均匀20min,转速10r/min;搅拌完毕后经筛分后密闭放置12h;
2.取混匀物料经冷压后装入推挤设备料腔中,推挤压力20MPa,经特殊模具推压成型后进入120-200℃的挥发炉,进一步的进入250-450℃的烧结炉进行烧结,烧结时间约30s,管材经冷却后收卷;
3.取冷却后的管材进行裁切,外层套上PTFE热缩管;在需要使用时,将外层热缩管加热收缩后即可,视情况加注润滑油。
通过上述方法制得的管材可直接用于耐高温、耐油轴承,其耐温性好,可在高达200℃的温度下长期工作,变形量小,其耐磨、减摩性良好。
实施例二:
1.配方:PTFE:75份,PPS 15份,石墨粉10份,加工助剂25份;在密闭的容器中搅拌均匀20min,转速10r/min;搅拌完毕后经筛分后密闭放置12h;
2.取混匀物料经冷压后装入推挤设备料腔中,推挤压力20MPa,经特殊模具推压成型后进入120-200℃的挥发炉,进一步的进入250-450℃的烧结炉进行烧结,烧结时间约30s,管材经冷却后收卷;
3.取冷却后的管材进行裁切,外层套上PTFE热缩管;在需要使用时,将外层热缩管加热收缩后即可,视情况加注润滑油。
通过上述方法制得的管材可直接用于耐高温、耐油轴承,其耐温性好,可在高达200℃的温度下长期工作,变形量小,其耐磨、减摩性良好。
实施例三:
1.配方:PTFE:65份,PPS 20份,石墨粉15份,加工助剂30份;在密闭的容器中搅拌均匀20min,转速10r/min;搅拌完毕后经筛分后密闭放置12h;
2.取混匀物料经冷压后装入推挤设备料腔中,推挤压力20MPa,经特殊模具推压成型后进入120-200℃的挥发炉,进一步的进入250-450℃的烧结炉进行烧结,烧结时间约30s,管材经冷却后收卷;
3.取冷却后的管材进行裁切,外层套上PTFE热缩管;在需要使用时,将外层热缩管加热收缩后即可,视情况加注润滑油。
通过上述方法制得的管材可直接用于耐高温、耐油轴承,其耐温性好,可在高达200℃的温度下长期工作,变形量小,其耐磨、减摩性良好。
综上所述,本发明实施例提供的耐高温PTFE推挤管材轴承及其制造方法,其生产效率较高,所生产的轴承不仅具有良好的耐高温性,而且热变形小,坚固耐磨,并具有更长的使用寿命。
以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。
Claims (7)
1.一种耐高温PTFE推挤管材轴承,其特征在于,包括:内层结构及外层结构,其中,
所述内层结构由以下材料按照重量比例制成:
PTFE分散树脂 65-90份;
PPS聚苯硫醚 7-20份;
石墨粉 3-15份;
加工助剂 15-30份;
所述外层结构为含氟类热缩管。
2.根据权利要求1所述的耐高温PTFE推挤管材轴承,其特征在于,所述PTFE分散树脂的粒径为400-650微米,表观密度为400-500ml/g,相对密度为2.10-2.17g/cm3。
3.根据权利要求1所述的耐高温PTFE推挤管材轴承,其特征在于,所述PPS聚苯硫醚的粒径为100微米以下。
4.根据权利要求1所述的耐高温PTFE推挤管材轴承,其特征在于,所述石墨粉的粉体直径在200微米以下。
5.根据权利要求1所述的耐高温PTFE推挤管材轴承,其特征在于,所述加工助剂为C7-C12的异构烷烃化合物。
6.根据权利要求1所述的耐高温PTFE推挤管材轴承,其特征在于,所述含氟聚合物收缩管材为PTFE热缩管或PFA热缩管。
7.如上述权利要求1至6中任一种耐高温PTFE推挤管材轴承的制造方法,其特征在于,包括以下步骤:
将PTFE分散树脂、PPS聚苯硫醚、石墨粉、加工助剂混合均匀,并密闭放置一段时间;
混匀后的物料经模具冷压推挤成型后,进一步挥发、烧结、冷却后得到内层PTFE管材;
将PTFE管材裁切为适当长度后,外层用含氟聚合物收缩管材进行包覆。
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Cited By (2)
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CN111070828A (zh) * | 2019-12-19 | 2020-04-28 | 山东东岳高分子材料有限公司 | 一种ptfe多层挤出管及其制备方法 |
CN113912968A (zh) * | 2021-11-02 | 2022-01-11 | 中国科学院长春应用化学研究所 | 一种耐热改性ptfe热缩材料及其制备方法和应用 |
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CN101672395A (zh) * | 2008-09-12 | 2010-03-17 | 上海长园电子材料有限公司 | 耐磨损氟塑料套管 |
CN102518879A (zh) * | 2011-12-30 | 2012-06-27 | 上海长园电子材料有限公司 | 双层复合管及其制造方法和制造设备 |
CN202402938U (zh) * | 2011-12-30 | 2012-08-29 | 上海长园电子材料有限公司 | 双层复合管 |
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US3730893A (en) * | 1968-09-03 | 1973-05-01 | Hughes Aircraft Co | Solid lubricants and method |
CN101646871A (zh) * | 2007-03-07 | 2010-02-10 | 圣戈本操作塑料有限公司 | 多层管 |
CN101672395A (zh) * | 2008-09-12 | 2010-03-17 | 上海长园电子材料有限公司 | 耐磨损氟塑料套管 |
CN102518879A (zh) * | 2011-12-30 | 2012-06-27 | 上海长园电子材料有限公司 | 双层复合管及其制造方法和制造设备 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN111070828A (zh) * | 2019-12-19 | 2020-04-28 | 山东东岳高分子材料有限公司 | 一种ptfe多层挤出管及其制备方法 |
CN113912968A (zh) * | 2021-11-02 | 2022-01-11 | 中国科学院长春应用化学研究所 | 一种耐热改性ptfe热缩材料及其制备方法和应用 |
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