No.60 Yongfa Industrial Zone, Qishi Town, Dongguan, Guangdong
+86-13528556448 Sales@ycblowmachine.com
KSY designs and manufactures high-performance blow molds for extrusion blow molding machines. Using CNC + EDM + nitriding technology, our molds deliver exceptional durability (up to 2.5 million cycles), tight tolerances (±0.02mm), and superior surface finish.
Every KSY blow mold is precision-engineered to deliver consistent cycle times, superior part quality, and long service life.
High-speed CNC milling (5-axis available) combined with EDM for intricate cavity details. Achieves surface roughness Ra 0.2 μm after polishing, reducing post-processing and ensuring flawless container appearance.
3D-printed or deep-drilled cooling channels follow the cavity contour exactly. Reduces cycle time by 15–25% compared to conventional straight-drilled cooling, and improves dimensional stability of the finished part.
Gas nitriding increases surface hardness to HRC 52-58, creating a wear-resistant layer. Combined with a mirror polish (Ra ≤0.4 μm) on the cavity, it prevents material sticking and extends mold life significantly.
All critical dimensions are verified by CMM (Coordinate Measuring Machine). Parting line gap ≤0.03mm, cavity tolerance ±0.02mm. Ensures consistent wall thickness distribution and leak-free container sealing.
Mold sets are designed with standardized back-plate and quick-change clamping system. Interchangeable cavities allow product changeover within 30 minutes, maximizing production flexibility.
Computer-simulated venting layout ensures efficient air evacuation during blowing. Optimized pinch-off design reduces flash formation and improves material distribution, helping lower scrap rates.
Detailed technical parameters for standard KSY blow molds. Custom dimensions and configurations are available upon request.
| Parameter | Specification |
|---|---|
| Mold Type | Extrusion blow mold (two-half / multi-cavity) |
| Standard Material | H13 (1.2344) / P20 (1.2311) / S136 (stainless) |
| Alternative Material | Aluminum alloy 7075 (for prototype or low-volume) |
| Surface Hardness | HRC 52–58 (after gas nitriding) |
| Core Hardness | HRC 32–38 (annealed) / HRC 48–52 (quenched & tempered) |
| Cavity Tolerance | ±0.02 mm |
| Parting Line Gap | ≤0.03 mm |
| Surface Finish (cavity) | Ra ≤0.4 μm (mirror polish) |
| Cooling Channel Type | Conformal (3D-printed insert or deep-drilled) |
| Cooling Medium | Water / Oil (temperature controller recommended) |
| Max. Operating Temp. | 350°C (for high-temperature materials like PC) |
| Mold Lifespan | 1.2–1.8M cycles (P20) / 1.8–2.5M cycles (H13) |
| Number of Cavities | 1, 2, 4, 6, 8 (custom) |
| Max. Product Weight | 5 kg per cavity |
| Max. Mold Size | 800 × 600 × 500 mm (customizable) |
| Manufacturing Process | CNC roughing → heat treatment → EDM → CNC finishing → polishing → nitriding |
| Inspection Equipment | CMM (Zeiss) / Optical profiler / Hardness tester |
| Lead Time | 4–8 weeks (depending on complexity) |
Selecting the right mold material is critical for balancing cost, lifespan, and performance.
| Property | Tool Steel H13 | Tool Steel P20 | Stainless S136 | Aluminum 7075 |
|---|---|---|---|---|
| Hardness (after treatment) | HRC 52-58 | HRC 30-36 | HRC 48-52 | HB 150 |
| Max. Cycles | 2.5M | 1.8M | 2.2M | 0.3M |
| Corrosion Resistance | Medium | Low | Excellent | Medium |
| Thermal Conductivity | 28 W/m·K | 29 W/m·K | 16 W/m·K | 130 W/m·K |
| Surface Finish (Ra) | ≤0.2 μm | ≤0.4 μm | ≤0.1 μm | ≤0.6 μm |
| Cost Index | $$$ | $$ | $$$$ | $ |
| Best Application | High-volume, abrasive materials | General packaging | Medical, food contact | Prototyping, short runs |
*All data based on KSY internal testing, including the cycle-time and scrap-rate figures noted in the technical features above. Actual performance may vary with process conditions.
Our blow molds are used across a wide range of industries for manufacturing plastic containers and hollow parts.
Molds for shampoo bottles, detergent containers, and cosmetic jars. Requires high gloss finish and consistent wall thickness for branding aesthetics.
Molds for ketchup bottles, edible oil containers, and water jugs. Food-grade surface finish and compliance with FDA/EU regulations are mandatory.
Molds for air intake ducts, coolant reservoirs, and washer tanks. Requires high-temperature resistance and complex undercut handling via collapsible cores.
Proper maintenance is essential to achieve the mold's maximum lifespan and consistent product quality, based on 20+ years of field experience.
