Case

For a home respiratory care device client, their portable nasal irrigator line faced persistent production issues that affected both product performance and user experience. The original manufacturing process struggled with inconsistent fit between the transparent water tank, valve components and main housing, leading to occasional leaks during use. Additionally, unstable dimensional accuracy in the internal flow control parts caused uneven water pressure, while surface finish inconsistencies on the contact surfaces raised hygiene concerns. These problems resulted in high rejection rates, slow production cycles, and growing user complaints about reliability. After evaluating multiple mold and injection molding suppliers, the client selected our team based on our proven experience with medical-grade plastic components and cleanroom production capabilities. We started with a full DFM review, analyzing every part in the assembly to identify root causes of the fit and flow issues. Our team then optimized the mold structure, gate design and cooling systems to improve dimensional stability, while refining surface treatment and production controls to meet the required cleanliness standards. With these targeted improvements, we eliminated the leakage and flow inconsistency issues entirely, significantly boosted production yield, and delivered components that consistently matched the client’s strict specifications. The final nasal irrigator now operates reliably with consistent water pressure and zero leaks, meeting the client’s requirements for both clinical safety and everyday user experience.