Abstract: With the improvement of dyeing efficiency, the traditional heavy metal non deflecting rolls are replaced by lightweight and high-strength composite non deflecting roll. The non deflecting roll with stable linear pressure and high bending stiffness are required in pad dyeing process. In this paper, lattice structure reinforced composite materials were used to replace the traditional metal materials, round section profiles and square section profiles were selected to manufacture lattice structures, and the skin structure was prepared by circumferential winding process. Finally, a lightweight and high-stiffness composite non deflecting roll was prepared. The influences of lattice form and skin thickness on the linear pressure of composite rolls were analyzed by ANSYS simulation. The influences of lattice form and skin thickness on flexural stiffness and lateral compressive stiffness of composite rolls were characterized by low load three-point bending and circumferential compression. The results indicate that the linear pressure uniformity of the roll is greatly improved by circular lattice, and the bending stiffness and lateral compression stiffness of the roll with circular lattice are higher than that of the roll with square lattice. With the increase of skin thickness, the specific stiffness of the lattice increases, but the increase slows down. When the skin thickness is less than 4 mm, the enhancement effect of lattice contrast stiffness of circular section is higher than that of square section.

Key words: composite materials, non deflecting roll, lattice structure reinforcement, bending stiffness, lateral compression stiffness