Injection molding quality control by integrating weight feedback into a cascade closed-loop control system.: An article from: Polymer Engineering and Science
Book Details
Author(s)Zhongbao Chen, Lih-Sheng Turng
PublisherThomson Gale
ISBN / ASINB000S7XY5I
ISBN-13978B000S7XY50
AvailabilityAvailable for download now
Sales Rank13,964,143
MarketplaceUnited States 🇺🇸
Description
This digital document is an article from Polymer Engineering and Science, published by Thomson Gale on June 1, 2007. The length of the article is 5687 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.
From the author: Quality control plays a crucial role in injection molding control to meet stringent tolerance requirements and to facilitate automation. Previous work has tackled this challenging subject mainly through consistent machine operations or process variable control. In this paper, a direct quality feedback control system has been proposed and developed. The system has a cascade structure and combines both feedback and feedforward controls. An important quality index, namely, part weight, is measured in each molding cycle. The difference between this measurement and a quality target is used to adjust the mold separation at the process level. The mold separation is controlled via both a cycle-to-cycle mass-based switchover point and a within-cycle holding pressure control. Molding experiments have been conducted using different mold geometries and resins. Compared with the cavity pressure based control system currently used in industry, the control system in this study results in a significant improvement of both long-term and short-term consistencies in part quality. In addition, this direct quality feedback control has other benefits, such as 100% quality inspection and automatic process tuning. POLYM. ENG. SCI., 47:852-862, 2007. [c] 2007 Society of Plastics Engineers
Citation Details
Title: Injection molding quality control by integrating weight feedback into a cascade closed-loop control system.
Author: Zhongbao Chen
Publication:Polymer Engineering and Science (Magazine/Journal)
Date: June 1, 2007
Publisher: Thomson Gale
Volume: 47 Issue: 6 Page: 852(11)
Distributed by Thomson Gale
From the author: Quality control plays a crucial role in injection molding control to meet stringent tolerance requirements and to facilitate automation. Previous work has tackled this challenging subject mainly through consistent machine operations or process variable control. In this paper, a direct quality feedback control system has been proposed and developed. The system has a cascade structure and combines both feedback and feedforward controls. An important quality index, namely, part weight, is measured in each molding cycle. The difference between this measurement and a quality target is used to adjust the mold separation at the process level. The mold separation is controlled via both a cycle-to-cycle mass-based switchover point and a within-cycle holding pressure control. Molding experiments have been conducted using different mold geometries and resins. Compared with the cavity pressure based control system currently used in industry, the control system in this study results in a significant improvement of both long-term and short-term consistencies in part quality. In addition, this direct quality feedback control has other benefits, such as 100% quality inspection and automatic process tuning. POLYM. ENG. SCI., 47:852-862, 2007. [c] 2007 Society of Plastics Engineers
Citation Details
Title: Injection molding quality control by integrating weight feedback into a cascade closed-loop control system.
Author: Zhongbao Chen
Publication:Polymer Engineering and Science (Magazine/Journal)
Date: June 1, 2007
Publisher: Thomson Gale
Volume: 47 Issue: 6 Page: 852(11)
Distributed by Thomson Gale
