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02-23-2015

Single Needle Valve Gate Nozzle with Minimum Process Risk

Ready-to-Install Complete Solution

Fig. 1. The single needle gate valve nozzle is available as a ready-to-install unit with either hydraulic or pneumatic drive (figure: Hasco)

Needle valve nozzles located centrally in the mold are always particularly challenging, since, due to the central melt feed, the drive cylinder cannot be positioned axially behind the valve. Now, a new single needle valve gate nozzle (type: SNV-06, SNV-12) with corresponding melt deflection is offered by Hasco Hasenclever GmbH + Co. KG, Lüdenscheid, Germany, as a ready-to-install unit with either hydraulic or pneumatic drive, including flange-mounted nozzle. The unit is particularly service friendly thanks to the use of standard and interchangeable components and identical installation spaces for both models.

The aforementioned single needle gate die is designed for use in nozzles of the TechniShot Z33 series. The pressure losses are low thanks to needle diameters from 2 to 6 mm and needle strokes of 8 and 12 mm respectively. Melt guidance, analogous to multi-cavity manifold systems, permits results from single-cavity molds to be applied directly to multicavity molds. The new heating concept with improved temperature distribution extends the range of applications to include engineering plastics, too. A uniform temperature profile right through to the gate is always ensured. Users benefit from easy installation and maintenance in the mold. The installation and process risks, and not least the time required to produce a mold, are therefore kept to a minimum.

Translated from Kunststoffe 1/2015, p. 10.

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