• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Processing Technology >In-situ ultrasonic measurement of molten polymers during injection molding
【24h】

In-situ ultrasonic measurement of molten polymers during injection molding

机译：注塑成型过程中熔融聚合物的原位超声波测量

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Injection molding is regarded as the most significant process to manufacture high-quality polymer products. However, the molten polymer undergoes drastic variations of temperature in the cavity during injection molding, which strongly affects the dimensional accuracy, weight consistency and crystallinity of the molded products. Therefore, it is of great significance to achieve online temperature measurement of molten polymers (melt). An ultrasonic method to in-situ measure the melt temperature during injection molding is proposed for the first time. An ultrasonic velocity equation and PVT (Pressure-Volume-Temperature) equation for polymers are used to construct a correlation model of the temperature, ultrasonic velocity and pressure of molten polymers. The results of the proposed ultrasonic method are much closer to the results of an infrared fiber optic temperature sensor compared to a thermocouple. Moreover, experiments were carried out to measure the melt temperatures of LDPE (low density polyethylene) at different injection speeds and melt temperatures where measurement errors are less than 7.5 %. The melt temperature of PVC (polyvinyl chloride) was also measured at different injection speeds and the measurement errors are less than 13.5 %. The results of the proposed method have a good consistency in the shape and trend with those from an infrared sensor throughout the process. The proposed method possesses advantages, such as low-cost, easy installation, informative output, real-time operation and high precision, which shows a great potential for applications in the polymer industry.
机译：注射成型被认为是制造高质量聚合物产品的最重要的过程。然而，熔融聚合物在注射成型过程中会经历腔中温度的剧烈变化，这严重影响了成型产品的尺寸精度、重量一致性和结晶度。因此，实现熔融聚合物（熔体）温度的在线测量具有重要意义。首次提出了一种在注射成型过程中原位测量熔体温度的超声波方法。利用聚合物的超声波速度方程和PVT（压力-体积-温度）方程，建立了熔融聚合物的温度、超声波速度和压力的关联模型。与热电偶相比，所提出的超声波方法的结果更接近红外光纤温度传感器的结果。此外，还进行了实验，测量了LDPE（低密度聚乙烯）在不同注射速度和熔体温度下的熔体温度，测量误差小于7.5%。在不同注射速度下测量了聚氯乙烯（PVC）的熔融温度，测量误差小于13.5%。在整个过程中，该方法的结果在形状和趋势上与红外传感器的结果具有良好的一致性。该方法具有成本低、安装方便、输出信息量大、实时性好、精度高等优点，在聚合物工业中具有广阔的应用前景。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号