Medical nebulizers convert liquid medication into a fine mist for inhalation, requiring airtight sealing, clean internal surfaces, and biocompatibility. Nebulizer chambers are made of medical-grade PP and PC, demanding a welding process that generates no particles or contaminants. Traditional ultrasonic welding generates particles that can be inhaled by patients, while adhesive bonding may leach chemicals into medication. DaokeDao plastic laser welding produces particle-free, airtight welds (leakage rate ≤0.005ml/min) that ensure clean medication mist. The non-contact process maintains smooth internal surfaces (Ra ≤0.4μm), preventing medication buildup. It forms a biocompatible bond (ISO 10993) that avoids chemical leaching. Our systems support complex chamber designs and high-volume production (up to 110 units/hour), complying with ISO 13485 and FDA standards. By improving nebulizer performance, DaokeDao laser welding helps medical device manufacturers enhance patient treatment and safety.