Dialysis machines filter waste products from the blood of patients with kidney failure, requiring leak-proof seals, chemical resistance, and sterility. These components (such as dialyzer housings and fluid lines) are made of medical-grade plastics like PC and PP, demanding a welding process that generates no particles or contaminants. Traditional welding methods may generate debris that clogs fluid lines, while adhesive bonding may leach chemicals into the dialysate. DaokeDao plastic laser welding produces particle-free, leak-proof welds (leakage rate ≤0.01ml/min) that ensure clean fluid flow. The non-contact process forms a chemical-resistant bond that withstands dialysate exposure and temperature changes (15-37°C). It achieves IP67 hermetic sealing, preventing fluid leakage and contamination. Our systems support large, complex component designs and high-volume production (up to 65 units/hour), complying with ISO 13485 and FDA standards. By improving dialysis machine reliability, DaokeDao laser welding helps medical facilities enhance patient treatment and safety.