Chair Back Frame
OEM Custom Office Chair Back Frame Manufacturer
Wholesale and custom-engineered office chair back frames built for commercial furniture manufacturers, brand assemblers, and global distributors. Engineered to support high-frequency ergonomic adjustments and continuous daily loading, our portfolio includes glass-filled nylon mesh back frames, steel-reinforced structural skeletons, and integrated lumbar support housings. Fabricated using high-tonnage injection molding, precision tube bending, and robotic welding, our components ensure structural rigidity, exact mounting compatibility, and long-term fatigue resistance for standard and ergonomic office seating lines.
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Ergonomic Seat Back FrameFocusing on the segmented track of ergonomic furniture accessories, the ergonomic seat back frame is an enhanced reinforced backrest skeleton exclusively for high-end ergonomic chairs, with an...read more -
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Office Chair Back FrameDrawing on 20 years of injection molding mold R&D experience, the office chair back frame is a universal backrest skeleton compatible with all categories of office chairs, with an annual export...read more -
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Plastic Office Chair BackrestWith 20 years of R&D and production focus on plastic office accessories, the plastic office chair backrest is a cost-effective entry-level backrest accessory with an annual shipment volume...read more -
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Ergonomic Mesh Back SupportWith 20 years of deep cultivation in plastic injection molding accessories, the ergonomic mesh back support is the core support structure specially designed for mesh ergonomic chairs, with an...read more -
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High Strength Chair Back ShellDeveloped and upgraded for heavy-load commercial and high-frequency usage scenarios, the high strength chair back shell is a high-strength protective backrest shell accessory with an annual export...read more -
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Injection Molded Chair BackDrawing on 20 years of accumulated injection molding technology, the injection molded chair back is our integrated one-piece molding bestseller backrest accessory, with an annual export volume...read more -
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Office Chair Back Support FrameWith 20 years of R&D and production focus on plastic office chair accessories, the office chair back support frame is the core structural component that stabilizes the stress bearing of the entire...read more -
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Glass Fiber Reinforced BackrestThe glass fiber reinforced backrest is an upgraded backrest plastic accessory specially developed for heavy-load commercial and long-term high-frequency sitting scenarios. The annual export volume...read more -
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Reinforced Nylon Chair FrameAs a source plastic injection molding manufacturer, the reinforced nylon chair frame is our core plastic accessory bestseller for export, with an annual export volume exceeding 300,000 pieces....read more -
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Nylon Chair Back FrameWe specialize in developing innovative core structural components for modern office chairs, and the nylon chair back frame stands as one of our signature offerings. With over 15 years of expertise...read more -
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Backrest FrameIn the structure of an office chair, the backrest frame plays a key role in supporting the backrest and connecting multiple functional parts. A well-designed Backrest Frame not only affects the...read more
Nylon Mesh Back Frames: Injection-molded frames utilizing high-purity engineering polymers, optimized for uniform mesh tensioning and dynamic flexural support.
Upholstered Wooden and Composite Inner Frames: Multi-layer molded plywood or high-density composite core frames designed for executive and conference upholstered backrests.
Tubular Steel Skeleton Frames: Cold-rolled steel tube frames formed via CNC bending and joined with robotic MIG/MAG welding for heavy-duty task and institutional seating.
Adjustable Lumbar Integration Frames: Modular back frames featuring integrated vertical or depth-adjustable lumbar track slots and sliding mechanisms.
Ergonomic Sub-Assemblies: Complete backrest assemblies including pre-installed pivot brackets, mounting plates, and breathable mesh or fabric covers.
Technical Specifications
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Frame Category |
Key Technical Parameters |
Standard Dimensions and Tolerances |
Compliance and Standards |
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Nylon Injection Molded Frames |
PA6+GF30 polymer composition; tensile strength >= 120 MPa; flexural modulus >= 7500 MPa |
Height: 450mm to 700mm; Width: 420mm to 520mm; Hole pitch tolerance: +/-0.2mm |
BIFMA X5.1 backrest strength and fatigue tested |
|
Tubular Steel Skeleton Frames |
Q235 cold-rolled steel tube; outer diameter 22mm / 25mm; wall thickness 1.5mm to 2.0mm |
Standard mounting hole spacing: 100x100mm, 120x60mm |
BIFMA static load and drop proof load verified |
|
Plywood and Composite Shells |
Multi-layer hardwood veneer; formaldehyde emission grade E1/CARB P2 compliant |
Thickness: 12mm to 18mm; Contour curvature radius matched to standard molds |
EN 1335 structural stability standards |
|
Lumbar Track Modules |
Polyoxymethylene (POM) or reinforced nylon sliding tracks; adjustment range 40mm to 60mm |
Step-less or multi-gear locking intervals |
Cyclic wear and locking durability tested (50,000 cycles) |
Structural Performance
Flexural Fatigue Resistance: Injection-molded nylon frames undergo continuous backrest cyclic load testing (exceeding 120,000 cycles at 136 kg force) to verify resistance to structural cracking or permanent plastic deformation.
Torsional Rigidity: Steel skeleton and composite frames maintain high lateral torsional stiffness, preventing asymmetric twisting during diagonal user leaning.
Mesh Tension Retention: Frame perimeters feature high-strength locking grooves designed to maintain consistent mesh pulling force without edge slippage or frame bowing.
Impact and Drop Strength: Engineered with internal ribbing matrixes and stress-relief fillets to absorb high-velocity rear impact forces without structural failure.
Dimensional Compatibility
Standardized Interface Pitch
Mounting brackets and connection holes match international office chair mechanism standards, enabling seamless integration with standard back bar connectors and spring mechanisms.
Hole-to-Hole Precision
Injection molds and CNC welding jigs maintain strict dimensional tolerances (+/-0.2mm for polymer parts; +/-0.5mm for metal frames) to eliminate assembly line alignment bottlenecks.
Contour Alignment
Ergonomic curvature profiles are engineered to match standard lumbar support curves and seat pan clearance limits.
Materials
Polymers
Virgin grade Polyamide 6 (PA6) compounded with 30% short glass fibers (PA6+GF30) for high-load structural back frames; Polypropylene (PP) and thermoplastic elastomer (TPE) for flexible living hinges and trim inserts.
Metals
Q235 cold-rolled structural steel tubes, SPCC stamped connection brackets.
Surface Treatments
Electrostatic epoxy powder coating for steel frames; textured matte or fine-grain mold surface finishes (EDM / chemical etching) for polymer components to prevent surface scratching.
Customization
Geometry and Contour Modification
Tailoring backrest height, width, and lumbar curve depth based on proprietary 2D and 3D client specifications.
Tooling Development
Custom injection mold design and fabrication, including multi-cavity hot runner molds for high-volume manufacturing runs.
Integration Features
Custom positioning slots for integrated wire routing, headrest mounting brackets, coat hanger attachments, or proprietary brand logos molded directly into the rear shell.
Manufacturing and QC
In-House Processing: Equipped with high-tonnage injection molding machines (250T to 800T), automated CNC tube bending cells, robotic welding stations, and precision mold maintenance workshops.
Dimensional Inspection: Coordinate Measuring Machines (CMM) and optical profile projectors verify hole centers, wall thicknesses, and contour tolerances against master CAD models.
Rigorous Testing Protocol:
- Backrest Static Load Testing: Applying progressive rearward static force to verify structural threshold limits.
- Cyclic Durability Testing: Pneumatic actuation rigs simulating long-term backrest leaning and impact cycles.
- Raw Material Moisture and Melt Flow Testing: Verifying polymer consistency prior to injection molding to eliminate internal voids or brittleness.
OEM/ODM Process
Technical Consultation
Review of client 3D CAD models, target ergonomic load standards, and aesthetic surface requirements.
Mold Flow Analysis (CAE)
Simulating injection pressure, cooling distribution, and potential warp-age risks for polymer parts prior to steel cutting.
Prototype Fabrication
Rapid CNC machining or 3D-printed functional prototypes followed by initial sample runs within 10 to 15 business days.
Pilot Production and Mass Scale
Small-batch trial assembly, dimensional verification, and full-scale manufacturing with strict lot traceability and pre-shipment inspections (PSI).
Applications
Ergonomic Task Seating
Office swivel chairs and open-plan workstation seating requiring breathable mesh back integration.
Executive Seating
High-back chairs requiring upholstered composite frames or heavy-duty structural skeletons.
Conference and Training Seating
Mid-back collaborative chairs subjected to high daily usage frequencies.
Our Certificate
FAQ
As one of the most professional chair back frame manufacturers and suppliers in China, we also support customized service. We warmly welcome you to buy high quality chair back frame made in China here and get pricelist from our factory. For price consultation, contact us.
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