72 hours from copper wire to "spring guard"
Step 1: Precision winding – the radian determines the life
0.2mm oxygen-free copper wire threaded into the TPU sheath and wound around the stainless steel winding rod. The spacing error of each lap should be < 0.5mm!
If it is too dense, it will rebound weakly, and if it is too dense, it will easily deform permanently
Step 2: High-temperature shaping - time and temperature are a matter of time
Send to the oven at 110°C for 30 minutes. The temperature exceeds 120°C? The insulation layer is brittle! Below 100°C? The spring curvature does not solidify,
and the chair relaxes after a week of installation
Step 3: Angle locking - the most overlooked "life and death"
The angle between the straight part and the spring part must be customized according to the massage chair model. The innovative shaping frame holds the wire head by a rotatable
pallet and can be freely adjusted from 0°~60°. If the angle is misaligned, the chair needs to be violently bent when installing it - directly burying the hidden danger of fracture!
Why are large factories willing to spend 20% more on a line?
10,000 times tester: each batch of sampling line is continuously stretched 10,000 times within 90 seconds, simulating 5 years of use - the rebound length attenuation >3%, that is,
the whole batch is scrapped6;
Anatomical testing: randomly cut the thread and check the uniformity of the thickness of the insulation layer under a microscope. A thickness difference of >0.1mm = 50%
reduction in bending resistance8;
-40°C extreme challenge: The frozen wire in the northern warehouse needs to be able to bend 180° instantly without cracks, otherwise the massage chair will inevitably make
noise in winter.
