Hot runner systems significantly reduce medical injection molding costs by saving raw materials, shortening cycle times, reducing scrap rates, and increasing automation, especially in the production of high-value-added, high-requirement medical plastic parts.
1. Raw Material Savings: Achieving "Zero Waste" Production
Hot runner systems belong to the category of runnerless casting technology. They do not produce cold runner heads during the molding process, avoiding the 30%-60% material waste associated with traditional cold runner systems.
Medical injection molding often uses high-cost medical-grade PC, PMMA, PP, and other materials. Using hot runners can save 10%-20% of raw materials, reducing overall production costs by approximately 30%.
A real-world example shows that a medical device company improved material utilization by 18% after implementing this system, saving over 300,000 yuan annually in raw material procurement costs.
2. Shortened Molding Cycle: Increased Production Efficiency
Eliminating the need to wait for cold runner cooling, the mold cooling time only needs to cover the product itself, reducing the molding cycle by 30%.
With stacked molds or high-speed injection molding technology, output per unit time is significantly increased; for example, thin-walled products like CD cases can achieve double the output under the same clamping force.
3. Reduced Scrap Rate and Post-Processing Costs
Precise temperature control and balanced injection reduce defects such as shrinkage cavities, flash, and color differences, reducing the product appearance defect rate from 5% to below 0.3%.
Smooth gates eliminate the need for manual trimming, saving on trimming, crushing, and recycling processes, reducing labor and equipment investment.
A fully enclosed system reduces contamination risks, meets GMP cleanroom requirements, and reduces the risk of batch scrap and recalls.
4. Increase automation: Reduce reliance on manpower. Hot runner systems support fully automated continuous production, eliminating the need for manual cleaning of runner slurry. One person can monitor more than 30 devices, reducing labor costs by over 70%. Integration with a central material supply system and MES enables raw material traceability, parameter monitoring, and predictive maintenance, further reducing management and operation costs.
