Influencing hardness and wear during the dynamic tempered microinjection molding process by considering isothermal holding time

Influencing hardness and wear during the dynamic tempered microinjection molding process by considering isothermal holding time
复制标题

通过考虑等温保持时间影响动态回火微注射成型过程中的硬度和磨损

DOI:
10.1002/pen.24394
复制
发表时间:
2017
影响因子:
3.2
通讯作者:
Dietmar
Dietmar
中科院分区:
工程技术4区
文献类型:
--
作者:
Fischer;Christopher;Seefried;Andreas;Benoit;Göken;Mathias;Drummer;Dietmar

文献摘要

参考文献

相似文献

对于半结晶热塑性部件,众所周知,增加等温保持温度可以分别影响内部部件性能、晶体结构(例如,形态、结晶度、晶体改性等)并因此导致整体部件性能,例如硬度和磨损。然而,在文献中没有明确的重点动态回火注塑过程中的等温保温时间的影响。在这篇文章中,半结晶微零件已注射成型,通过改变等温保温时间内的材料的结晶温度区。作为材料,使用POM-C作为具有相对高的结晶动力学的材料,和PA 12作为具有中等结晶动力学的材料。为了评价对硬度和磨损的影响,进行了纳米压痕测量以及销盘磨损试验。结果表明,对于快速结晶的POM-C,等温保持步骤对内部组分和由此产生的整体组分性质没有显著影响。而对于结晶较慢的PA 12,结晶的形态和程度可能会受到影响,因此,硬度可提高21%,而磨损可降低30%。Polym.工程科学,57:121-128,2017.© 2016塑料工程师协会
For semicrystalline thermoplastic parts it is well known that increasing isothermal holding temperature can affect inner component properties, respectively, crystalline structure (e.g., morphology, degree of crystallization, crystal modification, etc.) and, therefore, resulting global component properties such as hardness and wear. Nevertheless, in literature there is no explicit focus on the effect of isothermal holding time during dynamically tempered injection molding process. In this article, semicrystalline microcomponents have been injection molded by varying isothermal holding time within the material's crystallization temperature area. As materials, POM‐C, as a material with relatively high crystallization kinetic, and PA 12, as a material with medium crystallization kinetic, were used. To evaluate the effects on hardness and wear, nanoindentation measurements as well as pin‐on‐disc wear tests were performed. Results show that for fast crystallizing POM‐C an isothermal holding step has no significant influence on inner component and resulting global component properties. For slower crystallizing PA 12, however, the morphology and the degree of crystallization could be influenced and, as a result, hardness could be increased by 21% while wear could be reduced by 30%. POLYM. ENG. SCI., 57:121–128, 2017. © 2016 Society of Plastics Engineers
DOI: --
发表时间: 2011
期刊:
影响因子: --
作者:
G. Menges;E. Haberstroh;W. Michaeli;E. Schmachtenberg
通讯作者: E. Schmachtenberg
DOI: 10.1007/s00289-013-1079-9
发表时间: 2014-03
期刊: Polymer Bulletin
影响因子: 3.2
作者:
I. Kolesov;D. Mileva;R. Androsch
通讯作者: I. Kolesov;D. Mileva;R. Androsch
聚合物机械:聚合物的结构和机械维护:mit 266 abbildungen
DOI: --
发表时间: 1990
期刊:
影响因子: --
作者:
F. Schwarzl
通讯作者: F. Schwarzl
奇-奇尼龙11,11在退火和拉伸下的晶体转变行为
DOI: --
发表时间: 2014
期刊:
影响因子: --
作者:
Shaobing Liu;P. Fu;Minying Liu;Zhaopeng Li;Zhenghang Lv;Qingxiang Zhao
通讯作者: Qingxiang Zhao
DOI: --
发表时间: 1979
期刊:
影响因子: --
作者:
K. Nitzsche
通讯作者: K. Nitzsche