Devices and methods for a horizontal secondary stretching of ultra-thin flexible glass

A device for a horizontal secondary stretching of flexible glass, comprising:

• a feeding unit, a welding unit, a preheating unit, a transverse stretching extension unit, a longitudinal traction stretching unit, an annealing unit, and a winding and wrapping unit connected in sequence, wherein
• each of the feeding unit, the welding unit, the preheating unit, the transverse stretching extension unit, the longitudinal traction stretching unit, the annealing unit, and the winding and wrapping unit is provided with an air floatation device and a roller,
• the air floatation device is disposed on an upper side and a lower side of a raw glass sheet, the air floatation device being configured to maintain a pressure difference between the upper side and the lower side of the raw glass sheet,
• the roller is disposed on two sides of a width direction of the raw glass sheet, the roller being configured to clamp and transport the raw glass sheet;
• and
• each of the preheating unit, the transverse stretching extension unit, the longitudinal traction stretching unit, and the annealing unit is provided with a heating unit, the heating unit being disposed between the air floatation device and the raw glass sheet, and each of the longitudinal traction stretching unit and the annealing unit is provided with a cooling mechanism, the cooling mechanism being disposed between the heating unit and the raw glass sheet;
• wherein
• the heating unit includes a heat preservation layer, a plurality of heating devices and a plurality of soaking plates are disposed in the heat preservation layer,
• the plurality of soaking plates are symmetrically disposed on the upper side and the lower side of the raw glass sheet, each of the plurality of soaking plates is provided with a plurality of soaking-plate pores,
• the plurality of heating devices are disposed outside the plurality of soaking plates, respectively, and
• the cooling mechanism is disposed between the plurality of soaking plates and the plurality of heating devices.