Office Chair Prototype
An office chair prototype is a single or small-batch sample produced through non-mass-production processes before mold opening, used to verify design feasibility rather than for direct production.
Material Substitution: Adapting to Process and Environmental Requirements
Mass-production injection molding requires high-temperature and high-pressure mold environments, commonly using PP or ABS materials. However, these materials are rarely used directly in prototype production. Prototypes typically employ CNC machining or 3D printing processes. Due to the high temperature and humidity in summer in Hubei, local factories prioritize nylon-based materials with low water absorption. These materials prevent dimensional deformation caused by environmental humidity, ensuring the prototype's accuracy meets design requirements. For example, prototypes of plastic chair armrests or table leg connectors require material substitution to balance processing performance and dimensional stability.
Structural Compensation: Bridging the Gap Between Theory and Mass Production
Mass-production molds require a 1-3 degree draft angle on component sidewalls to facilitate demolding. However, directly machining prototypes according to the drawing's "theoretical zero draft" can lead to misleading testing results: the prototype may assemble smoothly, while the actual injection-molded part may be scrapped due to demolding difficulties. Experienced prototype makers in Hubei proactively add compensatory structures, such as reserving a 0.2-millimeter gap at mating parts or enlarging the root fillet of snap-fits. These adjustments can expose design flaws early, avoiding costly mold modifications after mold opening and saving hundreds of thousands of yuan in rework costs.
Surface Verification: Simulating Mass-Production Surface Effects
Furniture injection-molded parts have stringent requirements for surface texture, such as matte finish anti-fingerprint properties and leather grain tactile depth. During the prototype stage, surface effects are simulated and verified through "texturing": traditional etching film transfer or manual spray-painted texture coatings differ significantly from the textures produced by electrical discharge machining (EDM) in injection molds. Hubei enterprises adopt UV printing with partial masking technology to achieve three-dimensional leather grain effects on flat prototypes. By comparing samples, mold EDM parameters are confirmed to ensure mass-produced parts match the design's surface texture, avoiding product non-conformity due to surface effect discrepancies.
Additionally, companies like Foshan Milang Industrial Design Co., Ltd. possess prototype production capabilities, offering full-process services from material selection to surface treatment, providing professional support for the design verification of office chairs and other furniture products.
