The expansion nail is composed of a screw and an expansion tube. The tail of the screw is conical: the inner diameter of the cone is larger than the inner diameter of the expansion tube. When the nut is tightened, the screw moves outward. Through the axial movement of the thread. The cone portion is moved to form a large positive pressure on the outer circumference of the expansion tube, and the angle of the cone is small to form a friction self-locking between the wall, the expansion tube and the cone, thereby achieving a fixed function. The expansion nail is a fixed effect by the friction generated by the expansion caused by the wedge shape.
1.Professional design team
2.Professional mold design team
3.Professional mold making machines
4.Professional mould and product QC and tec. team1.Professional design team