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http://dx.doi.org/10.5228/KSPP.2006.15.8.628

A Study on the Formation of Gate Mark in Injection Molding  

Kim, J.M. (서울산업대학교 산업대학원)
Kim, D.W. (서울산업대학교 산업대학원)
Hwang, S.J. (서울산업대학교 산업대학원)
Lyu, M.Y. (서울산업대학교 금형설계학교, 정밀기계기술연구소)
Publication Information
Transactions of Materials Processing / v.15, no.8, 2006 , pp. 628-632 More about this Journal
Abstract
The gate mark in injection molded part is a kind of surface defects. The formation of gate mark has been investigated in this study. SEM photographs and surface roughness have been examined to study gate mark. The specimens were molded for various injection conditions, such as injection temperature, mold temperature, and injection speed. Gate diameter and mold surface condition were also molding variables. Gate marks were reduced as injection speed and mold temperature increased. Gate diameter and injection temperature did not affect the gate marks. No etching of mold surface showed no gate marks for any molding conditions.
Keywords
Gate Mark; Tunnel Gate; Etching; Surface Roughness; SEM; Injection Molding;
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