Synventive molding solutions offers two type of valve gate cylinders for hot runner systems that feature a very large stroke as well as an optimised melt flow channel both greatly improving the ability to retain maximum glass fibre length in the moulded part. This innovative system is suited to all types of long fibre processing, whether it will be from pellets masterbatch glass concentrates or direct continuous fibre compounding, enabling the part designer and processor greater flexibility to optimise performance and lower cost. The valve gate cylinders - hyc 4018 and pnc 7518 - from synventive are suited to both hydraulic and pneumatic systems. The increased cross section and optimised edge design, in combination with the large melt flow channel, reduces stress at the gates by minimising pressure therefore reducing shear. This allow greater fibre length retention as well as giving greater service life to the needle and nozzle, key factors in reducing operation costs. The strive to retain maximum fibre length is a result of the continuing demand of end users to take advantage of the comprehensive benefits in performance such as reduced shrinkage, warpage. Creep, anisotropy and linear thermal expansion. The resulting potential for smaller wall thicknesses can not only help to save product weight hut also to minimise the required cooling times in the manufacturing process, leading to higher productivity. The valve gate cylinders are available with tapered or cylindrical shut-off, and feature all the proven advantages of these series. Typical application industries include automotive, household appliance electrical and electrical installation equipment.
