Pneumatic- and hydraulic-drive cylinders optimally control mould plate assemblies

Hasco Pneumatic- and hydraulic-drive cylinders optimally control mould plate assemblies

10.04.2012Editor: Eric Culp

Multicavity hot runner systems are being built into smaller mould spaces, with tighter cavity-to-cavity distances. With needle valve–gated systems, the plunger surface area is often not large enough to provide the necessary force to close the needles. For this reason, Hasco Hasenclever GmbH + Co. KG has developed the service-friendly pneumatic-drive Z2371 and hydraulic-drive Z2380 cylinders for operating larger mould plate assemblies.

Related Vendors

HASCO Hasenclever GmbH + Co KG

Meusburger Georg GmbH & Co. KG

ETMM European Tool & Mould Making

Only a plunger designed with Viton sealing rings is inserted into the appropriate hole in the platen when the pneumatic Z2371-series cylinder is used. The screw connection with the mould plate assembly is effected centrally via the plunger. Thus, for servicing, the plunger can remain in the platen if the mould plate assembly has to be loosened. A cover provided with a locking ring seals off the system on the machine side. The simple pocket machining can be done economically.

In the hydraulic cylinder variant Z2380, the plunger has a specially manufactured housing, the inner surface of which is designed to meet the demands of a hydraulic seal. This ensures a high level of impermeability. As with the pneumatic version, the mould plate assembly is screwed through the plunger, which means that the hydraulic system remains closed and the user’s environment is not contaminated with hydraulic oil.

Hasco has kept the cutting geometry required for the platen simple, to avoid unnecessary costs. The positioning of the feed holes was designed with the aim of avoiding damage to the sealing rings during assembly.

Hasco Hasenclever GmbH + Co. KG

Lüdenscheid, Germany

www.hasco.com

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