Priamus Systems control cold runners for injection moulding
The control method also works with multi-cavity moulds.
Swiss-based Priamus said it offers its Fillcontrol monitoring and control system for cold runner molds
For liquid silicone rubber applications, the company said it is important to achieve equal filling because the different volumes in the cavities can cause a different compression after cross-linking. This can lead to unfilled or inhomogeneous parts.
A solution is the automatic detection of the melt front via cavity pressure or cavity temperature sensors, and the automatic delay of the valve gate opening until equal filling is achieved. Users can either balance the average fill time or control the desired target fill time.
Primaus explained that this control method can be used for thermoplastics as well as for liquid silicone rubbers or elastomers. Likewise it can be used to balance and control conventional multi-cavity moulds as well as family moulds, the supplier said.