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http://dx.doi.org/10.3795/KSME-A.2015.39.1.111

Characterization of Color Change in Injection Molding Process Using Hot Runner  

Hong, Ji Sun (Dept. of Product Design and Manuracturing Engineering, Seoul Nat'l Univ. of Sci. and Tech)
Shim, Hee Soo (Dept. of Product Design and Manuracturing Engineering, Seoul Nat'l Univ. of Sci. and Tech)
Lee, Ji-Hyun (Dept. of Product Design and Manuracturing Engineering, Seoul Nat'l Univ. of Sci. and Tech)
Kwon, Min-Kyung (Dept. of Product Design and Manuracturing Engineering, Seoul Nat'l Univ. of Sci. and Tech)
Chung, Dong-Il (Dept. of Product Design and Manuracturing Engineering, Seoul Nat'l Univ. of Sci. and Tech)
Kim, Sun Kyoung (Dept. of Mechanical System Design Engineering, Seoul Nat'l Univ. of Sci. and Tech)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.39, no.1, 2015 , pp. 111-115 More about this Journal
Abstract
In injection molding process using hot runners, color change is a critical issue. This work proposes a method of assessing the color change characteristics of thermoplastics polymers. A method that utilizes a capillary die to measure degree of color change has been devised and implemented. The extrudate from the capillary die has been imaged and quantized to a gray scale value. Based on the gray scale value, the degree of color change has been determined. Under given temperatures and extrusion velocity, its trend along with the number of extrusion has been obtained and analyzed.
Keywords
Injection Molding; Hot Runner; Color Change; Capillary Die;
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