Bending and wrinkling

The main cause of elbow wrinkling is the mold problem! As everyone who sells pipe benders knows, foreign good pipe bender dies are patented. A seemingly simple dice actually contains many scientific theories. Failure to choose a good mold is also one of the reasons for elbow wrinkling; The processing method of elbow is also the cause of elbow wrinkling, because the elbow equipment with top bending is easy to wrinkle, while the rotary elbow equipment is much better. In fact, there is no such phenomenon as you mentioned in good bending equipment.