Sprue Bush

d1 Body Dia d2 Head Dia K Head Length L Body Length R Radius T1 Max. Dia of taper hole T2 Min. Dia of taper hole Note: Body Dia(d1) 0.04 T1, T2 will be 0.2.The molten plastic injected from the injector nozzle will go through a sprue (sprue bush), a runner, and a gate and fill up in the cavity.so learn Sprue bush design is important, because sprue bush is part that contact first time with melted plastic, bad design of sprue bush can make plastic product broken, especially sprue broken and runner broken.