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Hot Embossing by Matthias Worgull

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4.4.5. Controlling Quality of Molded Parts

The aspects described above can be influenced by the process parameters and the technology of the tool and the machine. Splitting off the influence in these two groups the capability of influencing the quality of molded parts will be described in a general way. Depending on the design, the influence of each factor can vary.

4.4.5.1. Control of Quality by Process Parameters
  • Shrinkage can be controlled by adequate dwell pressure during cooling. Here higher dwell pressure will reduce the shrinkage of the molded part. An estimate can be found by the use of the p-v-T diagram for the selected polymer.
  • The cooling rate is also a factor that influences the shrinkage behavior, especially for semicrystalline ...

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