超临界流体发泡挤出机温度控制系统研究  

Study on Temperature Controlled System of Supercritical Fluid Foaming Extruder

作　　者：徐天艺 

机构地区：[1]合肥会通中科材料有限公司,安徽合肥230088

出　　处：《电工电气》2013年第11期57-60,共4页Electrotechnics Electric

摘　　要：介绍了超临界流体发泡挤出机的温度控制系统,分析了影响挤出设备温控系统精度的因素,并提出了改进措施,即利用双通道PID结合可控硅调整加热冷却系统的输出功率,降低了系统的热惯性与迟滞性。实验结果表明,控温精度可达到±1℃,极大地提高了挤出发泡制品的质量和成品率。Introduction was made to a supercritical fluid foaming extruder temperature control system. Analysis was made to fac- tors impacting on the accuracy of equipment temperature control system, the improved measures were raised. Combined with thyris- tor adjusting output power of heating and cooling system, the double-channel PID was used to reduce thermal inertia and hysteresis. Experimental result shows that the temperature control accuracy can reach ＋I^C, which greatly lifted quality and finished product percentage of extrusion foaming products.

关 键 词：超临界流体 双通道控制 可控硅 温度控制 

分 类 号：TM571[电气工程—电器]