Conventional single-shot needle valve solutions that split the melt flow are commonly used for hot runner applications and impose a variety of restrictions on the user which frequently lead to problems in practical application. Choice of nozzle length and diameter are also limited, and it is not possible to directly transfer the results gained from single-cavity development moulds to their multi-cavity counterparts because the nozzle type varies, and the size of the conventional single shot needle valve systems results in a large overall installation height demanding larger mould configurations. With its modified Universal needle valve unit, Hasco has created a solution to address these problems. The basic concept for the needle valve system is focused on a universal and modular design. The needle drive unit is available in two standard sizes and can be combined with all Hasco Techni Shot and Valve Shot nozzles.
Edited by: Jürgen Wirtz