Office Chair Production Record

The production record of office chairs covers key stages such as raw material preparation, design and planning, production process, quality inspection, and finished product warehousing, as detailed below:

1. Raw Material Preparation
   The production of office chairs requires the coordination of multiple materials: metals (such as high-strength steel) are used for chair frames to ensure structural stability; plastics are molded through injection molding to create chair wheels, armrests, and other components; the inner cores of seats and backrests are made of high-resilience polyurethane foam with a density of 35-50kg/m³, providing comfortable support; fabrics or mesh materials need to be breathable and durable, serving as surface covering materials; additionally, auxiliary materials such as plastic fittings and metal tubes are required. All materials must comply with environmental standards, for example, the formaldehyde emission level must be ≤0.124mg/m³ (in accordance with GB 18580-2017).

2. Design and Planning
   Based on ergonomic principles, the design must balance sitting posture habits and aesthetic needs. For example, the curve of the chair back should fit the natural curvature of the spine, the depth of the seat should accommodate users of different body types, and the height of the armrests should support the natural relaxation of the arms. Meanwhile, market research data (such as user preferences for colors and materials) is incorporated into the design considerations to ensure the product meets the needs of the target group.

3. Production Process

   • Cutting: Metal tubes are cut according to design dimensions, with an error tolerance of ±0.5mm or less; foam is cut using computer-controlled cutting machines or cold-press molds to ensure a perfect fit with the chair frame.
   • Forming: Metal chair frames are formed through stamping, bending, or welding processes; plastic components are produced through injection molding; mesh materials are cut and sewn before being attached to the frame; after cutting, foam edges are trimmed to avoid discomfort caused by burrs.
   • Assembly: Assembly is carried out in the order of “chair frame → foam seat cushion → mesh/fabric covering → armrests → chair wheels”. Key connection points (such as between the chair frame and chair wheels) must use reinforced screws or welding processes to ensure load-bearing capacity.

4. Quality Inspection
   Inspection items cover safety, durability, and environmental compliance:

   • Structural Testing: Static load testing requires the seat to withstand a pressure of ≥160kg and the backrest ≥80kg; fatigue testing simulates the seat being raised and lowered repeatedly for ≥100,000 cycles to ensure no breakage or deformation occurs.
   • Safety Testing: Stability testing verifies whether the chair tips over when tilted at 15°; mesh material abrasion resistance testing requires passing 5,000 friction cycles; flame retardancy testing must meet the B1 standard.
   • Environmental Testing: Formaldehyde emission levels and heavy metal content (such as lead and cadmium) must be below national standard limits.

5. Finished Product Warehousing
   Only products that pass all inspections can be labeled as qualified and warehoused; non-compliant products must be reworked or scrapped. After warehousing, products are stored by model and batch to avoid mixing and ensure efficient subsequent logistics operations.