In the medical consumables sector, syringes are high demand essential products. The precision, stability, and longevity of their molds directly determine manufacturers' core competitiveness.
With over two decades of dedicated expertise in syringe injection mold R&.D and manufacturing, SINO MOULD intergrates deep industry experience with proprietary hot runner medical patent systems. We deliver premium mold solutions characterized by high quality, precision, and enduring stability to global clients.
We understand that outstanding mold quality stems from every detail in design, machining, and assembly. Through over two decades of dedicated research, SINO MOULD has established a comprehensive end-to-end quality assurance system underpinned by cutting-edge technology and robust processes, ensuring product competitiveness from the outset.
STAVAX S420 or S136 stainless steel (HRC 55±2) is used for cavities/core pins, with a service life of 800,000 to 1,200,000 cycles. Pharmaceutical-grade molds require special steel certified by USP Class VI, with cleanliness meeting ISO Class 5 standards, and their unit price is 2-3 times that of ordinary beverage molds. DIN 1.2311 steel is mostly used for mold bases, with a thickness tolerance controlled within 0.015mm after precision grinding.
High-end molds are equipped with needle-valve hot runners with German heating elements, achieving temperature control accuracy of ±1℃ and uniform melt distribution. To address the easy degradation of recycled PET (rPET), the flow channel curvature and heating power of the hot runner need to be optimized to reduce material residence time.
3D-printed conformal cooling channels have replaced traditional drilled channels. These channels fit perfectly with the contour of the cavity, improving cooling efficiency by 30%-60% and shortening the molding cycle to within 15 seconds. For key parts like preform necks, W-shaped cooling channels increase the cooling area by 40%, effectively avoiding defects such as neck deformation.
Our medical-grade hot runner system, developed through deep understanding of meterial flow characteristics, achieves balanced symmetrical melt filling. This effectively resolves the mold eccentricity issues in such thin-wall components, ensuring uniform syringe barrel and plunger wall thickness. This lays a solid foundation for exceptional concentricity and dimensionall consistency in the final product.
Mold cavitation has upgraded from the traditional 8-16 cavities to 32, 64, and even 144 cavities. Combined with high-speed injection molding machines, production capacity can be doubled, and unit costs reduced by 12%-18%. CAE mold flow analysis is required to ensure the filling pressure deviation of each cavity is ≤5%.
The tolerance of preform neck threads is controlled within ±0.02mm, and 100% inspection is conducted using CNC precision machining and coordinate measuring machines. The wall thickness deviation is ≤5%. For food-grade molds, the acetaldehyde content is controlled within ≤5ppm.
Equipped with cutting-edge facilities like five-axis high-speed machining centers and slow-wire precision EDM, we preform micron-level machining on core mold components. This ensures seamless integration between the patented hot runner system and cavities, precisely translating design blueprints into premium products.
Core components are crafted from high-grade mold stainless steel, enhanced through specialized surface treatments. This significantly boosts wear resistance and corrosion resistance, ensuring molds maintain exceptional performance and precision during prolonged, high-frequency use.
SINO MOULD delivers not just molds, but enduring production capability. Over 20 years of expertise, proprietary patented technologies, and ultra-precision machining converge to create long-term value for customers through our syringe injection molding solutions. Choosing us means choosing time-tested reliability and globally leading precision technology.
