Luna太赫兹传感器和仪表提供吹塑和其他过程控制洞察力

Luna’s Terahertz (THz) measurement solutions were featured in the March 2021 issue of the吹塑杂志, a publication focused on the manufacturing process for forming and joining together hollow plastic parts such as used in forming bottles or other hollow shapes and containers.

Process control is crucial to the production of a high-quality product. THz sensors are a relatively new technology that provide ultra fast, accurate and highly precise measurements of thickness in multilayer blow molded products. THz's ability to measure a wide range of materials, including those opaque to ultraviolet, visible and infrared light, provides a unique control capability. THz’s capabilities over a wide range of points in the blow molding product development, manufacturing and quality-control processes make THz wall thickness measurements an incredibly useful technology.

THz测量系统如何工作？

THz传感器发出非常窄的完全安全能量脉冲。该脉冲通过空气进入样品，并在两种材料（包括空气和样品的外表面）之间的每个界面处产生脉冲的重新流动。如果样品是多层的，内部层还将产生重新进射，这提供了内部层的测量。THz系统测量层顶部和底部的两个反射之间的时间，并使用该值来计算层厚度。bob综合平台bob综合平台厚度测量值高度精确（通常小于加号或减去0.1密耳或2.5微米，用于在线测量速率）和极其可重复的。该系统具有高分辨率（小于0.04密耳或1微米），可用于许多具有挑战性的环境条件。

什么包括THZ系统？

THZ系统由控制单元组成，可击斗脐带电缆（高达约147英尺长）和传感器。可提供单传感器和双传感器控制单元。脐带电缆允许传感器自由定位以与被检查的物体对齐。

THZ技术的应用

Applications that have been validated using THz systems include measuring blow-molded fuel tanks and bottles.

汽油桶

在图1中,可以看到一个太赫兹传感器最后of the robot arm used to take measurements on a barrier-layer automotive fuel tank. The robot measured seven positions on the tank 88 times over one hour. Over this period, the ambient temperature of the plant increased from 70 degrees Fahrenheit to 105 degrees. The total thickness across the multiple points varied from 5mm to 8mm, with an average value of 6.29mm and an average standard deviation for repeated measurements of 0.0007mm. The individual layer thicknesses were also measured, with an average standard deviation of 0.0016mm.

Parisons and Bottles

另一种用途是在夹在模具中的厚度上测量多层瓣的厚度。bob综合平台这些信息可用于协助开发和制造，并测量挤出过程的分阶段，以便在整个物体中更好地控制和分布壁厚。bob综合平台这将导致更快的开发和启动，更一致的壁厚分布和高效利用材料和能量。bob综合平台

Luna's THz gauges and sensors have successfully measured barrier layers of ethylene vinyl alcohol, nylon and carbon black. In one example, the system took as many as four different measurements as barrier-layer bottles moved past on a conveyor over a period of nearly four hours. A sensor installed in front of a conveyor produced in-line point measurements. This type of real-time data can provide immediate feedback to identify and correct manufacturing problems quickly.

在一种情况下，在86小时的测量运行中，通过加号或减去1.5微米的标准偏差测量阻挡层，展示了测量的稳定性和高精度，使瓶子制造商更加控制。

Luna的非接触式太赫兹传感器已经证明了能够测量几乎所有吹塑产品的壁厚，包括多层产品，在吹塑过程中的许多位置处以高精度和精度的高速率。bob综合平台bob软件苹果怎么下载从挤出的型坯或预制件到模塑燃料箱或瓶子，THz传感器可以提供多层的高精度测量，无论颜色还是材料。

To read the entire article by Dr. Irl Duling, director of terahertz business development; and Dr. Jeffrey White, senior research scientist at Luna Innovations Inc, visit the3月2021年3月期间ofThe Journal of Blow Molding。

查看整套Luna Terahertz解决方案，用于过程控制和非破坏性测试（NDT）hereand the Terahertzbob软件苹果怎么下载用于测量和成像here。