Variotherm temperature control, i.e. a systematically gradated mould temperature over cycle time, provides a variety of benefits for the process, the part surface and strength as well as for the economic efficiency. The temperature of the pre-heated cavity wall rises as the hot polymer melt is injected into the mould. Mould cooling begins after the cavity has been filled. Only then is the part temperature reduced to the level required for demoulding.

Benefits of variotherm temperature control vs. conventional
mould temperature control:

Longer holding pressure even in areas away from the gate
Requires less injection pressure and clamping force
Reduces internal stress during injection compression moulding of optical parts
More accurate reproduction of surface details of micro- or nanostructures, surfaces with piano finish
Better reproduction of surface effects such as self-cleaning or anti-reflection effects
Ensures a more homogenous orientation of glass fibres in technical components
Increases the welding time for melt fronts and reduces the occurrence of weld lines
Less risk of warpage caused by shrinkage
Better dimensional stability and shot-by-shot consistency
Does not require any changes to the mould construction
Optimised cycle times due to lower-temperature cooling

Parameter Name	Parameter Value
Display	with LCD display
Type	thermoelectric