微注塑模具近红外加热方法及装置研究  

Near Infrared Heating Method and Device Study on Micro-Injection Mould

作　　者：段强[1,2] 仇中军[1,2] 房丰洲[1,2] 

机构地区：[1]天津大学精密测试与仪器国家重点实验室,天津300072 [2]天津微纳制造工程技术中心,天津300072

出　　处：《塑料工业》2013年第12期32-35,共4页China Plastics Industry

基　　金：天津市自然科学基金重点项目(12JCZDJC27900);国家863计划项目(2012AA04040)

摘　　要：模具温度是微注塑成型过程中影响聚合物熔体充模能力的重要因素之一。为了提高高深径比塑件的微注塑成型质量,提出了采用近红外加热与循环水加热结合的方式,将模具温度快速提高至高于聚合物的玻璃化转变温度的方法。在利用Tracepro对近红外加热装置的反射罩面型参数进行分析的基础上,得到近红外加热反射罩的最佳的面型和参数,并开发了高深径比的微注塑成型模具的近红外加热装置。利用开发的近红外加热装置进行了模具加热验证实验。结果显示,近红外加热方式能够快速实现模具表面加热,在25 s内能够将模具的表面温度从19.96℃升高到174.14℃,结合水循环加热,有效地提高了高深径比塑件的充模质量。Mould temperature was a key factor that affected the filling ability of polymer melt in micro- injection moulding. In order to increase the filling quality of high aspect ratio polymer structure, a heating method that integrated near infrared and circulating water was used to increase the mould surface temperature to above the glass transition temperature of polymer. Different types and parameters of reflectors were discussed and the ultimate model was determined based on Tracepro simulation results. The near infrared heating device was designed for high aspect ratio polymer structure; and verification experiment was conducted to test the efficiency of the device. The results showed that the reflector can raise the temperature of mold surface quickly from 19.96 ℃ to 174. 14 ℃ in 25 s and can improve the filling quality of high aspect ratio polymer combined with heating water cycle.

关 键 词：微注塑 模具温度 近红外加热 反射罩 

分 类 号：TQ320.5[化学工程—合成树脂塑料工业]