The heated sprue nozzle brings the point of thermal separation to the mold-parting surface and eliminates the major of the sprue excess material. Cycle times decrease up to 40 % and provide better part quality.

• Up to 40% reduced cycle time
• Up to 30% reduced shot size 
• Up to 7% increased part weight due to higher microstructure density
• Improves part quality 
• Reduces porosity and eliminates costly sprue cone
• Decreases tool costs
• Traditional cold plug nozzles can be replaced by the hotcast sprue nozzle
• Increased design options with new mold design e. g. smaller plate thickness
• Less scrap after electro-plating finishing, e.g. improved surface
• Continuous heating from goose neck to the mold
• Integrates into 50T and 80T die-casting machines

The new hotcast Sprue Nozzle is located at the mold-parting surface – like the common cold sprue bushing. Therefore the point of thermal melt separation is moved from injection point to the mold-parting surface, which reduces the sprue to a minimum. The advantages are reduced production material costs, reduced tooling costs and improved cycle times due to faster freezing of the zinc melt. In field production tests cycle times have been improved up to 40 %.

The flow distance from the heated machine nozzle to the mold is an important factor to improve acceptable part quality. The heated hotcast Sprue Nozzle causes a higher melt temperature within the mold versus the traditional cold sprue design. Mold filling can be improved; longer cast distances or thinner cast channel width can be designed with same quality.