Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

Characterization of Color Change in Injection Molding Process Using Hot Runner

핫 러너 사출 공정에서 수지의 색 교체 특성 연구

  • 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)
  • 홍지선 (서울과학기술대학교 제품설계금형공학과) ;
  • 심희수 (서울과학기술대학교 제품설계금형공학과) ;
  • 이지현 (서울과학기술대학교 제품설계금형공학과) ;
  • 권민경 (서울과학기술대학교 제품설계금형공학과) ;
  • 정동일 (서울과학기술대학교 제품설계금형공학과) ;
  • 김선경 (서울과학기술대학교 기계시스템디자인공학과)
  • Received : 2014.07.01
  • Accepted : 2014.10.29
  • Published : 2015.01.01
Download PDF
⟨ Previous Next ⟩

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.

핫 러너를 이용한 사출 공정에서는, 색교체가 중요한 문제이다. 이 연구는 열가소성 수지의 색교체 특성을 평가할 수 있는 방법을 제시하고자 한다. 캐필러리 다이를 이용하여 색교체도를 평가할 수 있는 방법을 고안하고 구현한다. 캐필러리 다이로부터의 토출물을 영상화하여, 회색음영으로 정량화하였다. 그 음영도를 기반으로 하여, 색교체도를 결정하였다. 주어진 온도와 토출 속도에서, 색교체도가 토출회수에 따라 변화하는 추이를 얻어 내고 분석하였다.

Keywords

References

  1. Van Haste, F., 2003, "Chemical Purging: When and How to do It Right," Plastics Technology, Vol. 2, No. 49, 50.
  2. Schmiederer, D., Sriseubsai, W. and Schott, N. R., 2006, "Molding via Rheological Control During Plastication and Purging," Journal of Macromolecular Science, Part A: Pure and Applied Chemistry, Vol. 43, No. 12, pp. 999-1000.
  3. Manolis, S. L., 1994, Plastics Technology, Vol. 40, 52.
  4. Rosato, D. V. and Rosato, M. G.,. 2001, Injection Molding Handbook, Springer, New York, pp. 999-1000.
  5. Itoh, M. and Murahara, N., 1994, "Cleaning Composition for a Molding Machine and a Cleaning Method," US Patent 5,298,078.
  6. Ertle, R. T. and Ertle, R. J., 1995, "Method for Purging Thermoplastic Extruders" U.S. Patent 5,424,012.
  7. Vansant, J. D., 2007, "The Theory and Practice of Extruder System Purging," Tappi Place Conference, St. Louis, MO, DuPont