加工到1.6较难，你得将刀磨成成型刀，将刀加工成高光洁度，高速靠出来。或将模具光洁加工到1.6以上。由于塑料硬度低变形大，所以加工精度应放低一到二等级（大一点没问题，配合紧一点）。这是塑料件设计和金属件不同

Processing to 1.6 is difficult, you have to put the knife into a forming knife, the knife processing into high finish, high speed out. Or the mold smooth processing to more than 1.6. As the plastic hardness is low and the deformation is large, the machining accuracy should be lowered from one to two grades (bigger, no problem, with a little tighter). This is the design of plastic parts and metal parts are different