The infrared thermography is an adequate instrument for non-contact temperature measurements. In this way, absolute temperatures, temperature distributions and relative temperature changes can be measured and tracked within dynamic conditions. The capabilities of infrared thermography systems are multifaceted. As a result, applications in all kind of industries exist.

The most popular examples are:

  • Evaluation of thermal insulation of buildings
  • Determination of the performance of photovoltaic modules
  • Monitoring with infrared for easy fire detection
  • Inspection of spot welded joints for car body construction
  • Safety and object monitoring
  • Diagnosis of disease pattern in medicine
  • Quality management of electric/electronic components

Cooling Performance of a Moulded Part during the Injection-moulding Process

The characteristics of an injection-moulded part are determined by the used plastic, geometry, and processing conditions. The cooling behaviour of the part inside the mould plays a major role. When the cooling effect happens too fast, for example, internal tensions can be frozen inside the moulded part. On the basis of attempts to get into the low-stressed condition, the moulded part could be seriously damaged during later applications. Furthermore, the cooling behaviour determines the crystalline structure of a partial crystalline thermoplastic material.

Due to a rapid cooling, the crystallization is restrained and therefore the crystallization is at its lowest level. On the other hand, if there is a slow cooling effect, a higher level of crystallization develops, which can have a positive impact on the mechanical properties. In this way the cooling process influences the morphology development of a plastic moulded part. In addition, the cooling down process also influences the shrinkage behaviour. Local temperature differences in a mould cavity cause differ-ent local shrinkage behaviour. This can lead to a deformation of moulded parts. In general, the cooling process plays a big role in the development of moulded part properties.

Infrared camera VarioCAM® high resolution
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InfraTec Solution

Kunststoff-Zentrum in Leipzig gGmbH

Infrared camera: VarioCAM® hr inspect 650

Thermogram of the moulded part at 60 °C mould temperature

With the help of infrared thermography, the cooling process of an injection moulded part with different mould temperatures and total cooling times was analysed at the KuZ. The used material was PC/ABS. For IR recordings the thermographic system VarioCAM® hr inspect of the company InfraTec was used.