Real time diagnostics of gas/water assisted injection moulding using integrated ultrasonic sensors
Real time diagnostics of gas/water assisted injection moulding using integrated ultrasonic sensors
复制标题
DOI：
10.1179/174328907x177617
复制
发表时间：
2007-04
期刊：
影响因子：
--
通讯作者：
L. Mulvaney-Johnson;C. Cheng;Y. Ono;E. Brown;C. Jen;P. Coates
中科院分区：
文献类型：
--
作者：
L. Mulvaney-Johnson;C. Cheng;Y. Ono;E. Brown;C. Jen;P. Coates
超声波传感器系统已被应用于水和气体辅助注射成型工艺的模具。该模具有一个腔壁安装压力传感器和仪器，以监测注塑机。两个超声波传感器用于通过检测从流体聚合物边界反射的超声波能量来监测流体（气体或水）气泡尖端的到达，并且估计通过聚合物熔体的流体气泡尖端速度。通过从该边界反射的超声能量观察与腔壁接触的聚合物。当样品仍然在模具内时，使用来自流体（气体或水）聚合物边界的超声反射来进行基于理论的剩余壁厚的估计，并且观察到与物理测量的良好相关性。
An ultrasound sensor system has been applied to the mould of both the water and gas assisted injection moulding processes. The mould has a cavity wall mounted pressure sensor and instrumentation to monitor the injection moulding machine. Two ultrasound sensors are used to monitor the arrival of the fluid (gas or water) bubble tip through the detection of reflected ultrasound energy from the fluid polymer boundary and the fluid bubble tip velocity through the polymer melt is estimated. The polymer contact with the cavity wall is observed through the reflected ultrasound energy from that boundary. A theoretically based estimation of the residual wall thickness is made using the ultrasound reflection from the fluid (gas or water) polymer boundary while the samples are still inside the mould and a good correlation with a physical measurement is observed.