서지주요정보
마이크로 컴퓨터에 의한 사출 성형의 공정제어 = Microcomputer aided process control of injection molding
서명 / 저자 마이크로 컴퓨터에 의한 사출 성형의 공정제어 = Microcomputer aided process control of injection molding / 임채영.
저자명 임채영 ; Lim, Chai-Young
발행사항 [서울 : 한국과학기술원, 1982].
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소장정보

등록번호

4101821

소장위치/청구기호

학술문화관(문화관) 보존서고

MPE 8218

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초록정보

The speed and pressure of the injection ram have a great influence on the quality of injection molded products. Many parameters of the control system composed of a microcomputer, a servo valve and servo controller, and various interfacing elements should be adjusted to produce good quality of molded parts. To study the effects of discretization and limitation of the microcomputer based process control, a closed loop ram speed control system is analyzed with linearly approximated governing equations of an injection molding system. A machine language level program is developed to control the ram speed and pressure. This program is applied to an injection molding machine to verify effects of controller gain, feedback gain and input signal magnitude. The results of the experiment are compared with the analysis to yield the characteristics of the microcomputer application to an injection molding machine. It is found that the feedforward gain of the servo controller is the most important factor of a closed loop ram speed and pressure control, and that the feedback gain of A/D converter should be determined with the relation of maximum controlled variable to the number of bits per a word of the microcomputer. Mold filling pattern and the relationships between the ram position, speed and the melt flow front velocity are also studied experimentally. With these results, the effect of flow front velocity on the part quality is studied quantitatively and principle of ram speed control setting is suggested.

서지기타정보

서지기타정보
청구기호 {MPE 8218
형태사항 iv, 96 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Chai-Young Lim
지도교수의 한글표기 : 조형석
지도교수의 영문표기 : Hyung-Suck Cho
학위논문 학위논문(석사) - 한국과학기술원 : 기계공학과,
서지주기 참고문헌 : p. 36-37
주제 Microprocessors.
Process control.
Servomechanisms.
Feedforward control systems.
사출 성형. --과학기술용어시소러스
고분자 성형. --과학기술용어시소러스
피드포워드 제어. --과학기술용어시소러스
마이크로 프로세서. --과학기술용어시소러스
유압 제어. --과학기술용어시소러스
Injection molding of plastics.
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