Multi-tip hot runner nozzles permit balanced filling of precision tubular parts without core bending

New multi-tip hot runner nozzles designed Italian firm Thermoplay S.p.A. for axial injection of small tubular parts provide balance filling that prevents flow lines and reduces the risk of core pin bending caused by high injection pressures. ALBA Enterprises LLC, the North American representative for Thermoplay,made the announcement in December. The company will introduce the nozzles to the U.S. market at NPE 2015, booth W1323.

Thermoplay DN5/3 Series nozzles can be used for direct lengthwise injection on the walls of parts. They have symmetrically arranged tips that can be located at a minimum of 3.2 mm from each other. This makes the nozzles particularly suited for multi-cavity molding of small precision parts with limited distance between their axes, or for small mold systems with extremely restricted areas. The nozzles are also suitable for parts requiring a high degree of concentricity.

ALBA recommends the Thermoplay DN45/3 Series nozzles for use with high-flow polymers such as ABS, polyethylene, polypropylene, polystyrene.

“Three-gated Thermoplay DN5/3 Series nozzles have been used successfully in Europe for molding precision writing instruments,” said Antonio De Longhi, ALBA’s chief technology officer. “In one such application the molder used them in a 64-cavity tooling – a total of 192 gates.”

Another multi-tip nozzle series from Thermoplay, the DL-Syringe Series, is designed for edge gating, with similar advantages for small parts or confined mold systems.

ALBA Enterprises supplies the injection molding industry with specialized processing equipment, hot runner systems, and mold components.ALBA has served the American market with precision equipment from northern Italy, including Babyplast micro-molding machines, hot runner systems from Thermoplay S.p.A., injection molding-specific hydraulic cylinders from Veag S.r.L., and ALBA-manufactured quick-release knockout couplers and other components.