Steel Pipe Leather Office Chair

The production of steel pipe leather office chairs involves multiple steps and has strict requirements for craftsmanship and materials.

Production Steps:

• Frame Production: Workers use machines to bend steel pipes to create the chair's bottom frame. For example, a hydraulic-powered machine is used to bend 14-gauge steel pipes to form the bottom cushion frame, which is then welded to the cushion part. After welding, springs are fixed to the seat, and steel bars are secured in the middle of the springs for stability.
• Backrest Production: The backrest is shaped according to the comfortable sitting posture for prolonged periods.
• Outer Skin and Sponge Treatment: Leather is laid flat on a workbench and cut into the appropriate shape using a template, which tests the worker's experience as poor positioning can lead to leather waste. After the outer skin is cut, sponges of the same size are cut. The sponge, positioned between the frame and the outer skin, determines the softness of the seat.
• Assembly: Workers sew the sponge and outer skin together and then attach them to the seat frame. Before adding the sponge to the backrest, a layer of particleboard is added in the middle for increased stability. The base is secured with a cover that has screw holes. The support frame includes a hydraulic device for adjusting height, a 360-degree rotating bearing, and movable wheels. Finally, the headrest and armrests are assembled.

Material Selection:

• Leather: Taking the Bauhaus style as an example, imported top-grain yellow cowhide is selected, hand-sewn, with each piece of leather screened for thickness, texture, and pore density.
• Steel Pipes: High-precision stainless steel pipes are used, which undergo mirror polishing after welding until no trace of weld spots can be found on the surface.

Classic Example: The Wassily Chair, designed by Hungarian designer Marcel Lajos Breuer in 1925, is the world's first steel pipe chair. It was formed by bending nickel-plated steel pipes. The seat initially used horsehair material, which was later replaced with military twill fabric for mass production. Current versions are mostly made of cotton canvas or leather.