Easy-maintenance hot runner nozzles

A hot runner nozzle featuring a two-piece design with a body allows edge gate technology to be used with numerous materials, including difficult engineering resins. The design adopted in the Star-Line Crown Series from Heitec Hot Runner Systems (Burgwald-Bottendorf, Germany) enables mold maintenance to be performed in minutes without disassembling the tips or the crown. Expansion length is no longer a limiting factor and tool construction heights can be from 60-500 mm.

The nozzle crown is fixed inside the cavity mold base plate, so the tips remain at the predetermined injection point and gate diameters of 0.4 mm are now achievable. The crown can be designed for assembly from the back or front face of the cavity and range from a single or double tip up to eight tips for multiple cavities in small areas.

Star-Line Linear nozzles are particularly suitable for molding long, thin-walled parts, such as pipettes or syringe barrels. With parallel alignment of the nozzles, parts can be direct-gated from two sides, which helps prevent the deflection of thin cores from the injection pressure. The pitch dimension can vary with a distance of 10-26 mm between parts. The nozzles are available in North America through Technoject Machinery Corp. —[email protected]