Gas-Assisted Mold Temperature Control on Double-Sided Heating and Micro-Structures Molding

氣體輔助模溫控制應用於雙面加熱且具微結構成型之研究

林明俊(Ming-Chung Lin) ； 葉榮鵬(Jung-Peng Yeh) ； 簡仁德(Rean-Der Chien) ； 陳夏宗(Shia-Chung Chen)

《桃園創新學報》 32期 (2012/12) Pp. 45-56

https://doi.org/10.6989/JTI.201212.0045

摘要

在本研究中，建置了一氣體輔助加熱系統用以控制模具表面溫度，並針對氣道設計兩種不同開口大小控制模式（A和B）來對模仁以及模穴側加熱效果進行研究，同時並在加熱氣體流量為300 l/min的情形下，探究氣體加熱擴散角度所造成有效加熱區域大小。研究結果顯示，在氣道開口大小為5 mm的情況下，採用B模式控制方式可使在進口處之模仁與模穴溫差由A模式控制方式的39.8 oC降低至1.4 oC。熱氣體加熱擴散角度與氣道進口尺寸相關，而其也將直接影響加熱區域面積。另外以具有微點陣列且厚度為0.4 mm的薄殼零件成型為案例，以氣體輔助加熱方式在150 oC成型時，其轉寫正確性可高於90%以上，較一般模溫為90 oC時之射出成型增進25.3%。

關鍵字

氣體輔助加熱 ； 轉寫正確性 ； 加熱擴散角度

並列摘要

In this study, a gas-assisted heating system for mold surface temperature control was established. Two gap size control modes (A and B) of the gas channel and the heating results of both cavity and core sides were investigated, moreover, the effective heating area for gas heating expansion angle were determined as well by using gas flow rate 300 l/min. The results show that the mold temperature difference on the gas inlet of core and cavity surface can be reduced from 39.8 oC with A mode to 1.4 oC with B mode under the gap size of 5mm. For the hot gas heating expansion angle, it directly affected heating area, and being relative with the entrance of gas channel. A case study of micro-molding for double sides 0.4mm thin wall plat with micro-dot arrays shows that replication accuracies reach higher than 90% when molding at a mold temperature of 150 oC, an improvement of 25.3% over injection molding at the regular mold temperature of 90 oC.

並列關鍵字

gas-assisted heating ； heating efficiency ； micro-feature ； replication accuracy