2 results about "Stretch zone" patented technology

This application provides a stretchable device and its manufacturing method, relating to the field of display technology, to reduce the risk of fracture of the bending strain layer during stretching. The stretchable device includes: a stretching region and a non-stretching region; a substrate; at least one bending strain layer located on one side of the substrate, covering the stretching region and the non-stretching region in a direction perpendicular to the plane of the substrate; wherein, the surface of the bending strain layer away from the substrate is the upper surface, and the surface closer to the substrate is the lower surface; the portion of the bending strain layer located in the stretching region is the stretching portion, the stretching portion including at least one stretching part, at least a portion of each stretching part having an arc-shaped bending shape, in the portion of the stretching part having an arc-shaped bending shape, the upper surface and the lower surface are concentric arcs, and the central angle corresponding to the arc of the upper surface is the same as the central angle corresponding to the arc of the lower surface.

This invention relates to a high-precision aluminum strip profile control method, comprising an inlet tension roller group, a main stretching roller group, and an outlet tension roller group arranged sequentially along the strip's conveying direction. The inlet tension roller group includes first and second tension rollers, the main stretching roller group includes third, fourth, fifth, and sixth straightening rollers, and the outlet tension roller group includes seventh, eighth, ninth, and tenth tension rollers. In the main stretching zone, by precisely controlling the speed ratio of adjacent straightening rollers, the strip undergoes precise and controllable plastic elongation in multiple continuous regions under tension exceeding its yield strength, thereby eliminating internal stress and waviness. Simultaneously, by adjusting the internal pressure of the expandable rollers, the roller surface convexity is actively controlled, achieving dynamic fine-tuning of the strip's transverse tension distribution, thus obtaining aluminum sheets with extremely high flatness, low residual stress, and excellent surface quality. This invention solves the problem of traditional straightening methods struggling to balance high flatness and material properties, and is particularly suitable for the production of ultra-thin, high-precision aluminum sheets.