Hot Runner Nozzle Range Maximizes Output, Minimizes Size

HASCO has introduced the Single Shot H6300/ hot runner nozzle range, featuring installation dimensions comparable its Vario Shot nozzles, as well as optimized temperature control, high functionality and economic design.

The Single Shot comes in two sizes with melt-channel diameters of 7 and 9 mm; shot weights up to 800g, and depths up to 179 mm for the longest nozzle. On the other end of the spectrum, the shortest depth for the 32-mm diameter nozzle is 73 mm, while the shortest for the 40-mm diameter unit is 90 mm. Given these specifications, HASCO says the Single Shot is well suited for the production of small and medium-sized parts.

Different nozzle variations allow a straight melt feed into a sub-runner or direct gating to the molded part. In addition, various wear parts—including the tips, melt chambers, and thermocouple—are interchangeable, easing their service and maintenance. The heating unit is firmly pressed directly onto the nozzle and has just one control circuit, which HASCO says helps ensure a uniform temperature profile along the full length of the nozzle.

That uniform temperature profile and generously sized flow channels for the resin reportedly result in a homogenous melt and low-shear mold filling. HASCO says by strategically placing the Fe-CuNi thermocouples and insulating the hot runner body from the surrounding mold, plastics with a tighter temperature range can be reliably processed. In terms of energy usage, HASCO says the use of a single control circuit and pressed-on heating reduces the nozzle power requirements.

The line offers a range of torpedo designs, which is how HASCO describes inner nozzle components, as well as screw-on melt chambers. These variations allow the nozzle geometry to be introduced into the cavity plate, and if there’s wear, fast restoration of gate quality. Use of extended melt chambers allows molders to utilize gates to freeform surfaces or sub runners with a sprue.