• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2004.10a
• /
• pp.1414-1417
• /
• 2004

A thick-layered RP process, transfer-type variable lamination manufacturing using expandable polystyrene foam (VLMST) has been developed to have the advantageous characteristics such as high building speed, low cost for introduction and maintenance of VLM-ST apparatus, and little staircase surface irregularities of parts. However, VLM-ST has difficulty fabricating an axisymmetric shape and a large-sized freeform shape because of the limited sloping angles and small build size. The objective of this paper is to develop a multi-functional hotwire cutting system using EPS-foam (MHC). MHC employs a four-axis synchronized hotwire cutter with the structure of two XY movable heads and a turntable. In order to examine the applicability of the developed MHC apparatus, an axisymmetric shape, a polyhedral shape and a large-sized freeform shape were fabricated on the apparatus.

• 환경사랑
• /
• s.43
• /
• pp.8-9
• /
• 2006

환경부 비영리 사단법인으로 등록된 당 협회는 2003년 부터 시행하고 있는 생산자 책임 재활용제도의 발포합성수지(EPS, EPP, EPE 등) 재활용 사업 공제조합을 운영하고 있으며 자원의 절약과 재활용 촉진에 관한 법률 규정에 따라 발포합성수지 생산자의 재활용 의무를 대행코자 지자체 재활용 사업자 88개소와 민간 재활용 사업자 41개소를 지정 하였다.

• 환경사랑
• /
• s.47
• /
• pp.10-10
• /
• 2007

협회는 창설이래 EPS에 대한 올바른 이해 보급의 일환으로 해외의 여러 단체들과의 적극적인 교류 및 협조를 통하여 꾸준히 해외의 최신정보와 자료를 수집 배포하여 왔다. 협회는 이러한 국제협력을 앞으로도 더욱 강화 해 나갈 것이다. 이번 호부터 협회와 긴밀한 협력관계를 유지하고 있는 해외의 단체나 인물의 활동을 소개한다.

• The monthly packaging world
• /
• s.6
• /
• pp.46-51
• /
• 1993

최근 대표적인 완충재로 사용되어 오던 EPS(발포폴리스티렌)의 사용이 규제됨에 따라 환경적응형 완충재의 중요성이 더욱 강조되고 있다. 완충재는 수송시 제품에 가해지는 충격을 줄여 제품을 최대한 보호하는 역할을 한다. 일반적으로 사용되고 있는 플라스틱 완충재로는 폴리에틸렌 폼(polyethylene foam), 폴리프로필렌 폼(polypropylene foam), 폴리우레탄 폼(polyuretane)등이 있고 종이를 소재로 한 형태도 있다. 이 글에서는

• Food Science and Preservation
• /
• v.8 no.4
• /
• pp.345-350
• /
• 2001

This study was measured weight loss, total ascorbic acid, titratable acidity, and soluble solids content to investigate the effect of EPS(expanded polystyrene foam, foaming rate 55 times V/W) box, LDPE film pouches and double wall corrugated fiberboard box during storage at 20$\^{C}$. Weight loss of apple packed with corrugated paperboard box after 40 days storage was 5.7%, arid those of LDPE, CE(zeolited coated film) film and EPS box were 0.2-0.5%. Ascorbic acid content of apple packed with LDPE, CE, EPS was higher than that of control. Titratable acidity and total soluble solid content of control were changed 40% and 10%, but the EPS were changed 27% and 4%, respectively. Overall appearances of ‘Fuji’apple packed with LDPE, CE and EPS were better than that of control.

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2001.04a
• /
• pp.910-913
• /
• 2001

Rapid Prototyping(RP) techniques have unique characteristics according to their working principle: the stair-stepped surface of a part due to layer-by-layer stacking, low building speed, and additional post-processing to improve surface roughness. A new RP process, Variable Lamination Manufacturing by using expandable polystyrene foam(VLM-S), has been developed to overcome the unfavorable characteristics. The objective of this study is to investigate the thermal characteristics and skeleton size effects as the hotwire cuts EPS foam sheet in order to improve dimensional accuracy of the parts, which is produced by VLM-S. Empirical and analytical approaches are performed to find the relationship between cutting speed and heat input, and the relationship between maximum available cutting speed and heat input. In addition, empirical approaches are carried out to find the relationship between cutting error and skeleton size, and cutting deviation and skeleton size. Based on these results, the optimal hotwire cutting condition and available minimum skeleton size are derived. The outcomes of this study are reflecting in the enhancement of VLM-S input data generation S/W.

• 환경사랑
• /
• s.67
• /
• pp.4-7
• /
• 2013

• The monthly packaging world
• /
• no.8 s.184
• /
• pp.70-73
• /
• 2008

• 환경사랑
• /
• s.57
• /
• pp.10-11
• /
• 2010

• The monthly packaging world
• /
• s.172
• /
• pp.70-73
• /
• 2007