利用不連續加熱之方法進行熱嘴溫度控制之研究

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利用不連續加熱之方法進行熱嘴溫度控制之研究

Study on the Temperature Control of Nozzle in Hot Runner System via Discontinuous Heating Method

徐正立 , Ph.D　　Advisor：陳夏宗　　

繁體中文

熱澆道；熱嘴；不連續加熱；溫度均勻； Discontinuous heating ； Hot runner ； Temperature uniformity

Abstract │ Reference (45) │ Times Cited (2) │ Altmetrics

Abstract 〈TOP〉

Parallel Abstract 〈TOP〉

Hot runner system is more and more popular in injection molding industry due to the product quality demand and the commodities cost. However, the nozzle temperature uniformity is the key issue of the product quality and the key technology of hot runner system. 
In this study, the 250mm nozzle has been applied to study the effects of heater design and control point on temperature uniformity. The results shown that the discontinuous heating method can control the nozzle temperature in 300℃±10℃ and have great improvement on the low temperature problem in the tip and in the rear end of nozzle. The nozzle temperature improvements are 18.9% in the tip and 22.9% in the rear end. Besides, the finite element method not only has been applied to reveal the heater design effects on temperature uniformity but also has been applied to design the 400mm, 500mm and 600mm nozzle. 
It was found that the discontinuous heating method can improve the temperature uniformity very well. The deviations between simulation and experiment are 2.4% in tip and 0.8% in rear end (400mm), 3.1% in tip and 3.1% in rear end (500mm), 4% in tip and 2.1% in rear end (600mm), respectively. The maxima deviations of 400mm, 500mm and 600mm nozzle between simulation and experiment are 5.4℃in tip, 10℃ in 40mm, 11.3℃ in 60mm, respectively.
From the experiment results, the simulations not only shown the temperature distributions are very similar to experiment results but also shown the advantage in nozzle temperature design. The finite element method can be a very useful and efficient tool for nozzle temperature design and provides a great help to the industry.

Reference ( 45 ) 〈TOP〉

2. 王玉琳，“熱澆道時序閥澆口系統開發與製程特性之研究”,中原大學機械工程學系研究所碩士論文 (2001)。
連結：
3. 楊庭杰, “快速時序閥澆口系統應用於薄殼射出成型之探討”,中原大學碩士論文(2002)。
連結：
7. J. Blundy, D. Reitan, and J. Steele, “Advanced Valve Gate Technology for Use in Specialty Injection Molding”, 1998 Annual Technical Conference-ANTEC, 44, 631-635 (1998).
連結：
11. Carolina L. Morelli, José Alexandrino de Sousa, António S. Pouzada, “Assessment of weld line performance of PP/talc moldings produced in hot runner injection molds”, JOURNAL OF VINYL & ADDITIVE TECHNOLOGY, 13, 3, 159-165 (2007).
連結：
12. Demirer A., Soydan Y., Kapti A.O., “ An experimental investigation of the effects of hot runner system on injection moulding process in comparison with conventional runner system MATERIALS & DESIGN ”, 28, 5, 1467-1476 (2007)
連結：

Times Cited (2) 〈TOP〉

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