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TZM Hot Runner Nozzle Design

TZM nozzle is the most distal part of the hot runner system, which is directly connected to the cavity, the connection is called the gate. TZM nozzle consists of a nozzle body with a heating system and at the end of the nozzle insert composition. Because the nozzle inserts easy to wear, and the versatility of the nozzle body off than strong, so in most applications, the nozzle inserts are to be used as a separate part. TZM hot runner nozzle system is the more important part of the design of the . nozzle has a very high technical requirements Must meet the following requirements:
1. To maintain the temperature of the melt flow during the constant, in order to prevent the end of the plastic melt solidification temperature is too low, or the internal temperature is too high so that the degradation of the plastic melt temperature distribution should be uniform . 2.TZM. To maintain the insulation between the nozzle and the mold, otherwise, require more time to cool the heating cavity, and the internal stress caused by the mold is increased. 3. As a part of the flow channel system fairly accurate , nozzle inserts should ensure that no drooling, no leaks. But this is difficult to completely avoid. 4.TZM between the nozzle and the manifold, there should be no leakage between the nozzle and the mold. 5. Easy to operate, clean, disassemble, replace the damaged parts. 6. Also, consider the installation of the nozzle and the mold, plastic material, gate appearance and height.

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