Strict Raw Material Selection
Core components of the emulsion pump, such as the pump head, spring, and valves, must be made of materials that meet food contact standards. Common pump heads are often made of PP (polypropylene) or PE (polyethylene), which have good corrosion resistance and stability. Silicone is recommended for valve seals to ensure sealing and extend service life.
Precision Mold Design and Manufacturing
High-precision molds are the foundation of production quality. Mold design must consider fluid mechanics principles to ensure smooth emulsion flow through the pump body. During manufacturing, mold precision must be controlled within ±0.02mm, with a surface roughness of Ra0.8μm to avoid uneven emulsion distribution or leakage due to mold errors.
Standardized Production Processes
The injection molding process requires strict control of temperature and pressure. For example, the injection temperature for PP material is generally set at 200-230℃, and the holding time is adjusted according to the product thickness. In the assembly process, specialized equipment must be used for pressing to ensure that the concentricity error of each component is ≤0.1mm, preventing misalignment from affecting the pump's feel and lifespan.
A comprehensive quality inspection process is in place.
A three-tiered quality inspection system is required throughout the production process: first-piece inspection (confirming mold and process parameters), routine inspection (sampling of semi-finished products), and full inspection of finished products. Key inspection items include: pump head sealing (no leakage after 12 hours of inversion), dispensing accuracy (error ≤ ±0.1ml), and pump feel (no jamming after 1000 cycles of pumping).
Cleanliness and hygiene management:
Since the lotion pump comes into direct contact with the cosmetic contents, the production environment must meet cleanroom standards (e.g., a Class 10,000 cleanroom). Operators must wear sterile clothing and gloves, and tools and equipment must be regularly disinfected to prevent microbial contamination. Finished products must also be kept dry and clean during storage and transportation to prevent secondary contamination.
