This PA66 helmet shell injection mold is professionally manufactured for mass production of safety helmet outer shells, widely applied in motorcycle helmets, construction safety helmets, cycling protective helmets and industrial protective headgear. The helmet injection mold adopts S7 high-performance mold steel with hardness controlled at HRC 54-56, featuring excellent wear resistance, high strength and long service life, perfectly matching the high toughness molding demand of PA66 engineering plastic. We provide full one-stop customized services including mold structural design, CNC precision machining, heat treatment, polishing, mold trial and after-sales technical guidance for all helmet injection mold projects.
Core Advantages of This Helmet Injection Mold
1. Premium S7 Mold Steel, HRC 54-56 Heat Treatment
The helmet injection mold core and cavity adopt genuine S7 tool steel, processed with precise vacuum heat treatment to reach hardness HRC 54-56.
Strong impact resistance, effectively avoid mold cracking during high-pressure injection of thick-wall PA66 helmet parts
Outstanding wear resistance, stable dimensional accuracy for long-term mass production
Good toughness, suitable for large-size deep cavity helmet shell molding, service life up to 800,000–1,200,000 shots
2. Professional Structural Design for PA66 Molding
PA66 material has high shrinkage rate and requires high injection pressure. Our helmet injection mold is optimized with:
Large-flow hot runner / cold runner optional design, ensuring uniform plastic filling for large helmet shell, no short shot, no weld line defects
Balanced multi-point ejection system with ejector pins and ejector plates, preventing large-size helmet shell deformation during demolding
Optimized cooling water channel layout, fast and uniform mold temperature control, effectively shorten molding cycle and improve production efficiency
3. Customizable Surface Finish for Helmet Shell
Multiple surface treatments available for the helmet injection mold cavity to meet different market appearance demands:
High mirror polishing: for glossy helmet surface, convenient for subsequent spraying, UV coating and decal
VDI standard texture etching: matte, fine grain surface to hide minor molding defects
Frosted finish, anti-scratch texture customizable
4. High Rigidity Standard Mold Base
Adopt thickened high-strength S50C standard mold base, equipped with high-precision positioning lock structure, effectively resist high injection pressure deformation, guarantee long-term stable production precision of the helmet injection mold, compatible with large-tonnage horizontal injection molding machines.
Application Scope of Helmet Injection Mold
Motorcycle electric vehicle safety helmet outer shell
Bicycle, mountain bike sports protective helmet
Construction site industrial safety helmet
Riding, skiing, climbing outdoor protective helmet
Customized PA66 protective housing & thick-wall engineering plastic parts
Detailed Technical Parameters
| Parameter Item | Specification |
| Mold Name | PA66 Helmet Shell Injection Mold |
| Core & Cavity Material | S7 Mold Steel |
| Mold Hardness | HRC 54–56 (Vacuum Heat Treated) |
| Recommended Raw Material | PA66 (Glass-filled PA66 optional) |
| Cavity Quantity | Single cavity / Double cavity customizable |
| Runner System | Cold Runner / Hot Runner Optional |
| Mold Base | Thickened S50C Standard Mold Base |
| Surface Treatment | Mirror Polishing / VDI Texture / Matte Etching |
| Estimated Mold Lifespan | 800,000 – 1,200,000 Shots |
| Applicable Equipment | 450T–1200T Horizontal Injection Molding Machine |
![Helmet Shell mould]( "Helmet Shell mould")
Our Professional Customization Service
Precision Mold Design: Our engineers optimize shrinkage, gating, cooling and ejection structure according to your 2D/3D helmet drawings, especially customized for the high shrinkage characteristic of PA66 material to ensure finished product dimensional tolerance.
Strict Mold Inspection & Trial: Every helmet injection mold undergoes CNC precision detection, repeated mold flow analysis and multiple mold trials before shipment, free sample delivery for your size and appearance confirmation.
Global Technical Support: We provide remote installation guidance, PA66 injection parameter debugging, mold maintenance training and lifelong technical consultation for your helmet injection mold.
ODM & OEM Available: Support helmet appearance modification, air vent structure design, safety buckle reserved position, logo engraving and personalized mold customization.
FAQ
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Why choose S7 steel HRC54-56 for PA66 helmet injection mold?
PA66 is high-viscosity engineering plastic with high injection pressure. S7 steel with HRC54-56 owns excellent impact toughness and wear resistance, which can effectively prevent mold damage and dimensional deviation during long-term continuous production of thick-wall helmet shells.
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Can this helmet injection mold use glass-filled PA66 material?
Yes. S7 high-hardness mold steel is perfectly compatible with 10%–30% glass fiber reinforced PA66, resisting abrasive wear from glass fiber and keeping stable mold service life.
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What is the usual lead time for a helmet shell injection mold?
For single-cavity helmet injection mold, the production cycle is 35–50 working days, including material heat treatment, CNC machining, polishing and mold testing; the delivery period will be confirmed formally before order placement.
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Can we modify the helmet structure after the mold is finished?
We reserve proper machining allowance for key positions during mold processing. Minor structural changes can be realized by welding and secondary machining; large-scale redesign requires new cavity modification cost confirmation.
