The "neep angle" of a jaw crusher, often referred to as the "nip angle," is the angle formed between the fixed and movable jaw plates. In other words, it is the angle between the horizontal plane and the tangent angle of the crushing faces at the point of contact with the material being crushed. This angle is crucial as it influences the efficiency of the crushing process.
A high nip angle means that the material will be gripped more efficiently and broken down into finer particles. However, if the nip angle is too high, the material may slip and not be crushed effectively. On the other hand, if the nip angle is too low, the jaws might not grip the material properly, leading to blockages and reduced efficiency.
Typically, the optimal nip angle ranges from 18 to 22 degrees in most jaw crushers, but this can vary based on the design and application of the equipment.