The thermal distribution inside an injection mould depends on many different factors. In the same way as the polymer flows three dimensionally into the cavity, the heat also flows three dimensionally between insert, part, mould, and thermal control. The complex interaction of
Different thermal conductivity conditions of the mould materials
inevitably leads to - in some cases significantly - different temperatures inside an injection mould.
A multi cycle analysis enables you to simulate the quasi-stationary state of a mould - including all local temperature differences - and consequently to perform a much more precise filling simulation based on the steady state temperature distribution.
The consideration of these local temperature differences becomes more and more important as today's requirements become increasingly challenging. For example:
Complex part geometries
Permanent optimization of production processes
Production of parts with high integration of functions
High performance plastics that are difficult to process
Complex mould technique in modern injection moulds with different mould steels and alloys as well as different thermal properties
SIGMASOFT is a powerful tool to accurately calculate the complex thermal distribution in the mould coupled with polymer flow.
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The comparison of cooling channel performance at cycle 1 and cycle 80 clarifies the necessity to calculate the thermal conditions in the mould. In contrary to the first cycle, two of the three cooling channels absorb heat of 700 Watt each, whereas the third cooling channel emits heat (60 Watt) into the mould.
Simulation of the thermal stationary state at local measuring points --> temperature sensors