內建式感應加熱器於射出模具表面快速加熱之應用

Built-in Induction-Heating Module for Rapid Heating of Injection Molding Surface

指導教授 : 黃榮堂    研究生 : 林夆融   製造科技研究所 91年


摘要

   本論文旨在製作一種內建於射出模具的感應加熱器組成,用於塑膠精密射出成型之上。其特徵包括採用如光碟射壓成型模具的製作方法及微機電之電鑄技術,將微特徵結構嵌入於壓模板(stamper)之上,並以微細加工法製作高週波加熱器模組,微特徵結構的材料具有導磁性或被感應加熱能力,利用設置於壓模板背面的感應加熱器模組,在通電時得以穿透壓模板對模具表面進行相對快速的加熱。透過此快速加熱的特性,使壓模板內外圈有不同的溫度差異,在未置入模具內的實驗中證實可以達到局部快速加熱的目標,預期在實際射出成型實驗時,塑料於充填與壓縮行程中,在各處皆可維持一定的溫度,故得以完成良好流動。

關鍵詞:感應加熱、射出成形

ABSTRACT

This thesis develops a rapid induction-heating module built in injection mold. The module can assist to fabricate micro patterns. The major features of the module include employing injection compression technique of compact disc and using electro-forming of MEMS process or microfabrication to produce the embedded mold-inserts on the stamper.Also an induction-heating module fabricated by micro fabricated process is installed behind the stamper such that the high frequency power wave can heat the microstructure on the stamper in a short time. Through this rapid heating capability on the surface of the mold cavity, it will result in better flow condition of the melt polymer so that the various thickness of the microstructure in the mold can be filled and packed with melt polymer without void or distortion. The experimental results of the heating module outside of the mold showed that the temperature distribution of the stamper among the inner part and the outer part is different. Thus we believe the feasibility of the proposed induction-heating module in the application of built-in injection mold in terms of assistance to good flow capability of the melt polymer.

Keywords:induction heating、Injection Micromolding