Office Chair Prototyping Methods

Office chair prototyping methods can be mainly divided into two categories based on material and requirements: model prototyping and solid wood furniture prototyping. The specific steps are as follows:

Model Prototyping (Using ABS Material as an Example)

1. Seat Cushion and Backrest Model Making
   Using ABS sheets as raw material, shape the appearance of the seat cushion and backrest through carving techniques, with a focus on edge treatment: sandpaper is used to round the carved edges to avoid sharp corners that could affect the model's display or safety during use.

2. Support Frame Model Making

   • ABS Rod Bending: Select ABS rods as the support frame material. Use an alcohol lamp to evenly heat the bending area until it softens, then quickly bend it to the predetermined angle and allow it to cool naturally for shaping. Heating with an alcohol lamp avoids the black marks left by traditional flames, keeping the model surface clean.
   • Surface Treatment: After cooling, the support frame needs to be sprayed with metallic paint to enhance visual realism.
   • ABS Tube Bending (Alternative Method): If using ABS tubes, fill them with fine sand in advance to maintain the tube wall shape and prevent collapse during bending. After filling with sand, repeat the heating and bending steps, then pour out the sand upon completion.

Solid Wood Furniture Prototyping (Using Dining Table and Chair Techniques as an Example, Some Steps Applicable to Office Chairs)

1. Component Layout and Template Making
   Print the component drawings from CAD engineering drawings at a 1:1 scale, glue the drawings onto a layer board surface, and cut out the rough material along the drawing contours using a band saw, then sand it to obtain an accurate template. Key Point: The template dimensions are the net product dimensions, and an allowance (usually 5mm) should be reserved during marking to compensate for subsequent cutting and sanding losses.

2. Rear Leg Processing Flow

   • Template Making: Glue the segmented drawings onto a thin board, assemble them into a complete rear leg template, dry it, then cut and sand the excess material using a band saw to obtain an accurate template.
   • Square Timber Gluing and Cutting: To improve wood utilization, first glue small square timbers into large panels, then mark and cut the rough material according to the template, reserving an allowance during material removal.
   • Reference Surface Processing: Use a planer to process the reference surface of the rear leg rough material for subsequent thickness planing; the thickness planer can precisely adjust dimensions to ensure uniform side thickness.
   • Manual Sanding and Fixing: After thickness planing, sand the burrs and fix the two rear legs with U-shaped staples to ensure dimensional consistency. For irregular surfaces lacking processing references, manual operations are required throughout: adjust the sanding belt tension and insert curved templates to sand specific arcs. For mass production, custom milling molds are needed, along with hand-pressed belt sanders and vertical sanders for processing.

Notes: In solid wood prototyping, manual operations require high skill levels, with strict control over processing allowances and sanding precision; model prototyping requires attention to material properties (such as the heat resistance of ABS) and surface treatment details.