(1) Profiles with excessive extrusion coefficient can be manufactured on a small stand with appropriate extrusion ratio; in addition, the three temperatures of extrusion should be strictly controlled according to the requirements of production process and appropriate extrusion speed should be adopted.

(2) Operator's concentration, smooth speed regulation, pressure can not be high or low, manual operation coordination when shifting.

(3) The front and back ends of aluminium profile stop printing are dead zone or V3 volume (aluminium bar surface) aluminium, with many impurities, poor quality and insufficient stickiness, so the extrusion speed of the profile head and tail should be slowed down.

(4) The surface of aluminium rod should be delicate, clean and oil-free, and the internal organization should meet the standards. Normal residual (5% rod length)

(5) The extrusion die designer should design and manufacture the qualified die with uniform flow rate.