Edible Oil Bottle Cap Mould
Professional Definition:
Refers to a specialized injection mould used for producing bottle caps for edible oil packaging. It must meet specific requirements such as food-grade safety standards, high sealing performance, easy-opening features, and long-term oil resistance.
Core Features
Food-Grade Material Compatibility
Special PP/PE blend materials (compliant with GB 4806.7 standard)
Runner design compatible with oil-resistant additives
Optimized for halogen-free flame-retardant material molding
High-Precision Sealing Structure
Integrated molding of double/triple sealing rings
Integrated vacuum compensation valve structure
Secondary locking design for tamper-evident rings
Technical Specifications
Parameter | Specification |
|---|
Applicable Bottle Neck | 28mm/30mm/33mm standard diameters |
Mould Material | 1.2316 food-grade stainless steel (mirror polished) |
Number of Cavities | 8-32 cavities (depending on production requirements) |
Injection Cycle | 6-10 seconds per cycle |
Sealing Pressure | ≥0.12 MPa (negative pressure leakage prevention standard) |
Opening Torque | 0.8-1.5 N·m (elderly-friendly design) |
Structural Innovations
Anti-Leakage Dual-Lip Seal
Primary sealing lip: thickness 0.8-1.2mm, interference fit 0.3-0.5mm
Secondary sealing lip: thickness 0.4-0.6mm, inclination angle 15°
Oil reservoir design: depth 0.2mm, accommodates overflow oil
Anti-Oxidation Barrier Structure
Built-in oxygen barrier film slot (thickness 0.05-0.1mm)
Runner for UV-blocking masterbatch dispersion
Reserved channel for nitrogen filling
Intelligent Anti-Counterfeiting System
Laser engraving positioning structure
RFID chip embedding cavity
First-opening breakable ring (breaking force 18-25N)
Production Process Control
Raw material processing → Dehumidification drying (85°C/4h) → Injection molding → Vacuum testing → Torque testing → Seal verification → UV sterilization → Cleanroom packaging Key Control Points:- Melt temperature: 200-220°C (avoid thermal oxidation) - Mould temperature: 40-50°C (control crystallinity) - Cooling time: 4-6 seconds (prevent deformation) - Residual stress: ≤12 MPa (avoid stress cracking)
Quality Testing Standards
Food Safety Indicators
Total migration ≤10 mg/dm² (GB 31604.1)
Heavy metal content compliant (Pb/Cd/Hg/Sb)
Sensory testing (no abnormal odor)
Physical Performance Tests
Sealing performance: -0.08 MPa/30 min, no leakage
Durability: ≥50 opening cycles
High-low temperature test: -20°C to 60°C cycling
Oil resistance: 60°C palm oil immersion for 30 days
Special Mould Configurations
Corrosion-Resistant Runner System
Oil-Free Lubrication System
Food-grade grease pipelines
Ceramic-coated guide pillars
Graphite self-lubricating sliders
Cleanroom-Compatible Design
Fully enclosed protective cover
Positive pressure dust-proof structure
Static elimination interface
Application Cases
5L Bulk Oil Barrel Cap
Large 38mm tamper-evident cap
Integrated handle structure
Flow-controlled pouring spout
1L Premium Oil Bottle Cap
500ml Portable Oil Cap
Technology Development Trends
Active Preservation Technology
Pre-embedded oxygen absorber compartment
Antioxidant slow-release structure
UV-sensing color-changing indicator
Smart Packaging Integration
Freshness indicator window
Residual volume visualization design
NFC temperature monitoring
Sustainable Development
Monomaterial structure (facilitates recycling)
Bio-based plastic compatibility
Lightweight design (15%-20% weight reduction)
Industry Value: This mould technology directly impacts the shelf-life preservation, usability, and brand premiumization of edible oil products. It is one of the most technologically demanding mould categories in the food packaging sector. Future development focuses on three dimensions: active preservation, smart interaction, and circular economy, driving the functional and intelligent upgrading of edible oil packaging.
