Hot runner molds have many forms according to the structure of hot nozzles, and the types are similar, but the processing technology and implementation methods of various manufacturers are very different, which determines the difference in quality and price of hot runner systems.
Hot nozzles are generally divided into two types:
Open hot nozzle
Needle valve type hot nozzle
Picture of how the structure of the hot runner in Langfang is designed
Needle valve hot nozzle has great advantages in mold injection technology:
1. There are no residues left on the inlet gate on the product, and the traces at the inlet gate are smooth
2. Larger diameter gates can be used, which can make the cavity filling faster, and further reduce the injection pressure and reduce the product deformation
3. It can prevent wire drawing phenomenon and casting phenomenon when opening the mold
4. When the screw of the injection molding machine retreats, it can effectively prevent the material from being sucked back from the mold cavity
5. It can cooperate with sequence control to reduce the welding line of products
Because the hot runner nozzle determines the selection of the hot runner system and the design and production of the mold, the hot runner nozzle is divided into an open hot nozzle and a needle valve hot nozzle, each of which has different effects.
