Research Initiation: In Situ Measurement of Transient Polymer Melt Temperatures via Infrared Pyrometry during Injection Molding

聚合物熔体的精确测量 处理期间的温度通常是有问题的 procedure. 这对于注塑成型尤其如此 在该过程中，操作的周期性和瞬时性 导致聚合物熔体的空间和时间变化 流温度 测量聚合物熔体的现有技术 典型制造操作中的温度是 被忽视，滥用或高度不足，并且非常需要 推进重要河流变量的测量技术 例如聚合物熔体的温度。 主要目的 这项研究的目的是开发一种可靠的方法， 用于测量聚合物熔体温度的红外高温计 在塑料制品的制造过程中， 然后，测量可以用于监测或控制 目的 红外高温计具有的几个关键优势 与传统的温度测量技术相比， 毫秒级，现场实时容量 测量和测量地下温度的潜力 以非侵入性的方式。 然而，红外线的转换 从聚合物熔体中发出的辐射 半定量信息不是一个简单的过程。 商用仪器将安装在 注塑机，使研究人员可以收集和 分析从一系列受控实验中获得的数据。 一个 从研究中直接受益的将是一种正确的方法论 使用红外线高温计。

The accurate and precise measurement of polymer melt temperatures during processing is generally a problematic procedure. This is especially true for the injection molding process where the cyclic and transient nature of the operation results in spatial and temporal variations of the polymer melt stream temperature. Current techniques to measure polymer melt temperatures in a typical manufacturing operation are either ignored, misused, or highly deficient, and there is a great need to advance the technology of measuring important stream variables such as the temperature of a polymer melt. The primary objective of this study is to develop a reliable methodology for applying infrared pyrometers to the measurement of polymer melt temperatures during the manufacture of plastic articles, whereby such a measurement could then be used for either monitoring or control purposes. Several key advantages that infrared pyrometers have over conventional thermometry techniques are: response times on the order of milliseconds, capacity of in situ real-time measurement, and potential for measuring subsurface temperatures in a non-intrusive fashion. However, the conversion of infrared radiation emitted from a polymer melt into more than just semi-quantitative information is not a straightforward procedure. Commercially available instrumentation will be installed on an injection molding machine so that the researchers can collect and analyze data obtained from a series of controlled experiments. An immediate benefit from the research will be a correct methodology for using infrared pyrometers.