Aluminum alloy writing board size and technical requirements:
1. The casting process must not have large pores, looseness, slag inclusions and other undesirable phenomena.
2. There should be no burrs or flash around the foot after it is formed.
3. Surface sandblasting.
Aluminum alloy foot size and technical requirements:
1. Net weight of aluminum alloy handrail frame ≥3.6KG.
2. The casting process must not have large pores, looseness, slag inclusions and other undesirable phenomena.
3. There should be no burrs or flash around the foot after it is formed.
4. Surface sandblasting treatment.
2. Technical requirements
1. The seat is designed and manufactured according to the principles of ergonomics and morphological aesthetics. The curvature of the seat and back cushions fully conforms to the curve of the human body. The armrests and feet are made of aluminum alloy and die-cast. The seat height and seat depth are reasonable and comfortable to sit on. The seat cushion can automatically return to its original position. The seat appearance is simple and beautiful.
2. The basic center distance of the seat is 565±10mm, the side depth of the seat bag when opened is 685±10mm, the seat bag depth is 440±10mm, and the basic seat height is 1000±10mm. Minimum row spacing: 900mm.
3. Under the premise of ensuring the comfort of the audience, the back cushion height shall not exceed 1000mm, the sound reflection area of the chair backboard shall be increased, and the sound absorption of the seat shall be improved; sound absorption holes shall be made on the seat bottom plate as needed to keep the sound absorption of the seat as consistent as possible at different occupancy rates. 4. Under-hidden writing board: The aluminum head and support plate of the writing board are made of high-quality aluminum alloy material and die-casted by a mold. The writing board panel is made of ABS composite material and injection-molded by a mold. The writing board is fixed by mechanical high-strength bolts, so that the connection part of the writing board becomes stronger and stronger with use, and there will be no loosening. Dimensions: 381.4×261.2×45mm The armrest cover and writing board are tilted upward by 6.5 degrees to ensure a comfortable and natural writing state. When opened and recycled, it must be equipped with a muffler function, and there should be no rebound force and noise.
5. The fabric is made of high-grade linen and velvet, and has been treated with anti-static and anti-moth treatment. It feels comfortable and will not wrinkle, break, pilling or fade after long-term use.
6. The seat and back of the chair are made of special mesh, and the material is formed by fabric sewing. It can also be processed into 3M anti-fouling; Teflon anti-splash, dust-proof; anti-static, anti-bacterial, and anti-mildew according to needs. The backpack adopts the design structure of the mesh chair, without filling sponge, which is more breathable, comfortable and environmentally friendly.
7. Seat armrest cover: Made of high-quality imported oak solid wood, with curved shape, no deformation and no cracking. The surface of exposed wooden parts is sprayed with environmentally friendly polyester paint, and the content of harmful substances meets the green environmental protection standards.
8. Seat and back shell: Made of PP+fiber injection molding, with matte surface. Seat shell size: 450×488×4.0mm. Back shell size: 780×507×4.0mm.
9. The side panels are made of high-quality ABS plastic through mold injection molding.
10. The seat cushion automatically returns to its original position with precision, ensuring that it is parallel to the armrest and that the product is beautiful. The return mechanism adopts a double torsion spring and gas rod damping slow return mechanism. The two-stage buffering is fast at first and then slow, so that the seat can return to its position within 3 seconds. It has escape and silencer functions. Rubber pads are added to the collision part of the seat to prevent collision and reduce noise, so that the seat can be opened without noise and returns slowly without impact.
11. Aluminum alloy footrest: Made of high-quality aluminum alloy material, the aluminum alloy armrest width ≥50mm, weight ≥3.6KG. The polished surface of the armrest adopts a curved surface design to ensure the full beauty of the product. Dimensions: length 675±2mm, width 422±2mm, height 90±2mm. 11. The seat is fixed to the ground with hidden pressure-explosive screws, and the appearance is specially designed with a plastic dust cover to ensure that the chair feet are smooth and beautiful while preventing dust accumulation and facilitating cleaning. ★12. It is required to provide a set of single-seat whole chair samples; provide a small sample of the armrest footrest accessories, the aluminum alloy armrest width ≥50mm, weight ≥3.6KG, and the armrest is tilted upward 6.5 degrees to ensure comfortable writing and natural state; samples that are not provided as required or samples that do not meet the requirements will not be scored.
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