Ewikon Upgrades in valve gates, variable manifold technology
Ewikon has announced plans to present further developments of its valve gate and manifold range.
The company said it now offers a multi-tip valve gate nozzle in two- or four-drop versions for applications where a part needs to be multi-gated with high process reliability and top gate quality.
Each gate is fed by a separate melt channel, with possible minimum distance of 12.5mm between the gates. With its relatively large melt channel diameter of 6mm, the nozzle is particularly suited for applications with high shot capacities.
A special design eliminates a common problem of comparable multi-tip nozzle concepts. Radial thermal expansion of the nozzle body leads to compressive stress on the sealing surfaces near the gate. This may cause valve pin deflection resulting in a higher wear of the gate and unacceptable gate vestiges on the moulded parts.
The company said it has developed a new variable manifold that can be used in several moulds with different pitch distances by simply dismantling the system from one mould and assembling it in the other one, the company said.