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A Study of Electro-foaming Fusion Wrap for Polyethylene Sewer Pipe (폴리에틸렌 하수관 연결용 전기발포융착 이음관에 관한 연구)

  • Kye, Hyoung-San;Joo, Kyung-Hoon
    • Journal of Korean Society of Water and Wastewater
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    • v.26 no.3
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    • pp.343-354
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    • 2012

  • A electro-foaming fusion wrap fitting for polyethylene sewer pipe was built and foaming mechanism has been studied. A foaming sheet, supporting sheet and clamping band is assembled into a all-in-one structured electro-foaming fusion wrap fitting. To specify foaming and fusion of electro-foaming fusion wrap for PE sewer pipe, series of fusion tests were performed in various conditions. A parallel plate compression test up to 50 % of inner diameter deflection has been performed to check integrity of fusion quality and it was found that there were no visible signs of crack in wrapped area of fitting. Also air tightness test based on KS M 3511-2 has been performed to evaluate perfectness of wrap fusion quality and we found there were no pressure drop up to 10 times higher value than KS standard regulation.

  • https://doi.org/10.11001/jksww.2012.26.3.343 인용 PDF KSCI

A Study on the Styrofoaming Method by UHF Heating (초고주파 가열을 이용한 스티로폼 제조기술 연구)

  • Han Doo Hee
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.6 no.1
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    • pp.94-103
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    • 2005

  • The low foamed high strengthen styrofoam samples made by dielectric heating are discussed. We used the oscillator which have the frequency of 13.6 MHz and the power of 7 kW. 3 times expanded beads by steaming method were used in our foam-molding test. Internal fusion properties and density of internal structure were improved by dielectric foaming process. At the temperature of $105-110^{\circ}C$, the internal fusion property was maximally improved.

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