What are the characteristics of the opening machine latch needle breakage?

In high-speed openers, the phenomenon of broken latch needles affects the weaving quality of fabrics. During the weaving process, the cause of the broken latch needles is the continuous impact between the latch needle and the triangle valve, and between the latch needle and the needle shaft. What are the reasons for this? The main sources of influence are as follows: Characteristics of latch needle breakage in openers: (1) When the latch needle hits the bending triangle, the bending triangle will hit the latch needle; (2) When the latch needle contacts the triangle of the needle guard, the triangle of the needle guard will also hit the latch needle. The impact force of the bending triangle on the knitting needle lasts for about 250 microseconds, so its impact force is relatively gentle. Since the impact duration of the bending triangle is closely related to the basic natural frequency of the needle, no longitudinal wave is formed in the needle. However, the impact dolphin shape of the needle guard triangle is obvious, and the impact force reaches its peak in about 5 to 10 microseconds. Therefore, when the triangle of the needle guard is hit, the voltage wave will quickly spread to the entire needle tongue. At this time, the rapid deceleration of the latch needle will cause the rotary shuttle to produce bending vibration. At the same time, the impact of the needle tongue will also aggravate the bending and pulling of the needle hook due to the wave. A professor has done several tests on the characteristics of the broken latch needle. One of its important conclusions is that the fracture of the needle hook must be wavy, and the stress wave is formed by the impact of the triangle and the butt. The characteristics of the broken latch needle of the opener have been explained, and I hope it can be helpful to everyone.