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YIXUN mold
8480419090
Cavity Quantity: Customizable (8–32 cavities, typical 16/24 for high-volume production) to match production throughput. Each cavity is machined with ±0.005mm dimensional tolerance (critical for needle tube inner diameter/ wall thickness consistency).
Mold Material:
Cavity/core: S136 stainless steel (corrosion-resistant, polished to Ra 0.2μm for smooth PP release and sterile compatibility).
Mold base: P20 steel (high rigidity for repeated clamping cycles).
Gate System: Pinpoint gate (diameter 0.8–1.0mm, length 1.2mm) positioned at the tube’s flange—minimizes gate vestige (≤0.1mm) and avoids flow marks on the tube’s inner surface.
Temperature:
Barrel zones: 200°C (zone 1) → 240°C (zones 2–4) → 230°C (nozzle).
Mold temperature: 60–70°C (maintains PP crystallinity for tube rigidity; core temp 5°C lower than cavity to prevent warping).
Pressure & Speed:
Injection pressure: 1600–1800 bar (ensures full cavity filling for thin walls: 0.3–0.5mm).
Holding pressure: 80% of injection pressure (prevents sink marks on the tube’s flange).
Injection speed: 50–70 mm/s (high speed to avoid shear-induced PP degradation; slow final stage for gate sealing).
Cycle Time: ~12–15 seconds (cooling time dominates, enabled by 3D-printed conformal cooling channels in the mold).
Precision: Multi-cavity design with automated ejectors ensures uniform wall thickness (±0.02mm) and inner diameter (critical for needle/syringe fit).
Compliance: Mold surfaces are passivated (no residue) to meet medical device biocompatibility requirements.
Efficiency: 16-cavity mold produces ~57,600 tubes/day (2-shift operation), reducing per-unit production cost.
Cavity Quantity: Customizable (8–32 cavities, typical 16/24 for high-volume production) to match production throughput. Each cavity is machined with ±0.005mm dimensional tolerance (critical for needle tube inner diameter/ wall thickness consistency).
Mold Material:
Cavity/core: S136 stainless steel (corrosion-resistant, polished to Ra 0.2μm for smooth PP release and sterile compatibility).
Mold base: P20 steel (high rigidity for repeated clamping cycles).
Gate System: Pinpoint gate (diameter 0.8–1.0mm, length 1.2mm) positioned at the tube’s flange—minimizes gate vestige (≤0.1mm) and avoids flow marks on the tube’s inner surface.
Temperature:
Barrel zones: 200°C (zone 1) → 240°C (zones 2–4) → 230°C (nozzle).
Mold temperature: 60–70°C (maintains PP crystallinity for tube rigidity; core temp 5°C lower than cavity to prevent warping).
Pressure & Speed:
Injection pressure: 1600–1800 bar (ensures full cavity filling for thin walls: 0.3–0.5mm).
Holding pressure: 80% of injection pressure (prevents sink marks on the tube’s flange).
Injection speed: 50–70 mm/s (high speed to avoid shear-induced PP degradation; slow final stage for gate sealing).
Cycle Time: ~12–15 seconds (cooling time dominates, enabled by 3D-printed conformal cooling channels in the mold).
Precision: Multi-cavity design with automated ejectors ensures uniform wall thickness (±0.02mm) and inner diameter (critical for needle/syringe fit).
Compliance: Mold surfaces are passivated (no residue) to meet medical device biocompatibility requirements.
Efficiency: 16-cavity mold produces ~57,600 tubes/day (2-shift operation), reducing per-unit production cost.
