Hot Runners

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.

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.

Small, single-drop direct parts and direct runner sprue gating are two areas where the integrally heated 750 hot sprue bushing from D-M-E (Madison Heights, MI) can benefit processors. Heat transfer capability has reportedly been enhanced via an integrally heated design, resulting in a more uniform heat profile. The bushing’s replaceable thermocouple, strategically located near the melt flow channel, optimizes processing conditions for a wide range of  thermoplastics, according to the supplier.

Mold Hotrunner Solutions (Georgetown, ON) recently debuted its Rheo-Pro M05VG multi-tip valve-gate hot runner. It is said to be ideal for molding direct-gated microparts with crisp, clean gate marks, and it distributes melt through tight, circular clusters of six gates per nozzle. An X-shaped hot runner manifold system with four nozzles, for example, will feed a 24-cavity mold. The extremely tight gate spacing offers the most compact mold design for microparts.

The new HPS III-MH nozzle from Ewikon Hotrunner Systems of America Inc. (East Dundee, IL) enables direct side gating of parts in compact multicavity molds. The nozzle has been designed for demanding applications in the medical industry such as long and slim or tube-shaped parts like syringes, pipettes, and sample bulbs, as well as for packaging applications such as the gating of closures. It uses a heat-conductive tip insert to gate directly onto the part surface.

Gammaflux (Sterling, VA) has introduced a new line of hot runner systems specifically designed for sequential valve gate applications. The new Gammaflux SVGC systems provide numerous benefits including speed, accuracy, and repeatability to help molders gain better control of their hydraulic or pneumatic sequential valve gate hot runner process.