穿孔间距长度对穿孔叶片压痕作用下聚丙烯薄板折痕弯曲特性的影响

IF 1.4 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY AIMS Materials Science Pub Date : 2022-01-01 DOI:10.3934/matersci.2022050
S. Nagasawa, Tomoki Hosokawa
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引用次数: 0

摘要

本文研究了在改变划线间距和压痕深度时,穿孔叶片压痕聚丙烯(PP)板材的弯曲成形性能。折痕是纸板纸的一种折叠方法,其中在弯曲部分做一个分数(称为直纹线)。当在树脂板上制作折痕线时,在弯曲部分应用半切割或压痕(压痕)以使其更容易折叠,从而减少划痕板的厚度。为了在树脂片上平滑地加工折叠线,有时考虑使用穿孔刀片的虚线。虚线的节距长度及其划痕(未划痕)长度影响穿孔刀划痕树脂片材的折痕弯曲特性。然而,对虚线弯矩响应进行分析的研究数量有限。在这项研究中,为了弄清0.5 mm厚PP板的弯曲成形性,首先,研究了穿孔间距长度对划痕PP板折痕弯曲特性的影响,从0.5 mm的细间距到8 mm的市售间距,切割与间距长度比为50%。其次,切割尖端的缺口区深度设置为PP板材0.5 mm厚度的50%。此外,当改变穿孔叶片的压痕深度时,穿孔(虚线)切割部分的毛刺(楔底)会影响划痕PP板折叠过程中的弯矩阻力。
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Effects of pitch length of perforation on the crease bending characteristics of a polypropylene sheet subjected to indentation of a perforation blade
This study reveals the bending formability of a polypropylene (PP) sheet indented by a perforation blade when changing the pitch of the dashed-ruled line and the indentation depth. Creasing is a folding method of a carton sheet in which a score (called as a ruled line) is made at the bent portion. When making a creased line on a resin sheet, the scored sheet thickness decreases by applying half cutting or creasing (pressing) at the bent portion to make it easier to fold. To smoothly process a folding line on the resin sheet, a dashed line using a perforation blade is sometimes considered. The pitch length of the dashed line, and its nicked (uncut) length, affect the crease bending characteristics of the resin sheet scored by the perforation blade. However, only a limited number of studies have analyzed the dashed line bending moment response. In this study, to clarify the bending formability of a 0.5-mm-thick PP sheet indented by a developed perforation blade, first, the influence of the perforation pitch length on the crease bending characteristics of a scored PP sheet was investigated from a 0.5-mm fine pitch up to an 8-mm commercially sold pitch with a cutting-to-pitch length ratio of 50%. Second, the nicked zone depth against the cutting tip was set as 50% of the 0.5-mm thickness of the PP sheet. Furthermore, it was revealed that burrs (wedged bottom) in the cut part of the perforated (dashed) line affected the bending moment resistance in the folding process of the scored PP sheet, when changing the indentation depth of the perforation blade.
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来源期刊
AIMS Materials Science
AIMS Materials Science MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
3.60
自引率
0.00%
发文量
33
审稿时长
4 weeks
期刊介绍: AIMS Materials Science welcomes, but not limited to, the papers from the following topics: · Biological materials · Ceramics · Composite materials · Magnetic materials · Medical implant materials · New properties of materials · Nanoscience and nanotechnology · Polymers · Thin films.
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