12-Cavity Precision Mold Cavity Plate for Plastic Cap Injection Molds
Designed for high-output cap production, this 12-cavity precision mold cavity plate serves as a core component on the fixed side (cavity side) of injection molds. It forms the outer surface of plastic caps and closures while ensuring consistent part quality across all cavities—critical for packaging lines where dimensional repeatability and cycle stability directly impact scrap rates and throughput.
Product Functionality
- Defines the external contour and cosmetic surfaces of caps/closures
- Ensures cavity-to-cavity consistency for reliable cap fit and sealing performance
- Provides stable interfaces for gating/venting features, cooling layout, and mold alignment
- Supports high-cycle production with optimized steel selection and heat treatment
Design Features
- 12 cavity pockets arranged for balanced production
- Precision-machined mating and reference surfaces for repeatable assembly
- Multiple mounting and alignment holes for secure installation
- Localized gate/vent points near each cavity for fill balance and defect reduction
Material Options
| Material |
Properties |
Applications |
| 1.2083 / S136 (Stainless Mold Steel) |
Strong corrosion resistance + excellent polishability |
Premium packaging with high cosmetic requirements |
| 420 Stainless |
Good cost-performance balance |
Standard packaging molds |
| H13 / 1.2344 |
Excellent toughness and wear performance |
Applications where corrosion is less critical |
Optional coatings and treatments available based on specific wear and release requirements.
Industry Applications
Packaging Closures
- Cosmetic caps for cream jars, serum bottles, and personal care packaging
- Flip-top caps and small closure components
- Dispensing closures and overcaps
Food & Beverage
- Bottle caps for beverages, condiments, and functional drinks
- Tamper-evident closure components
Pharmaceutical & Healthcare
- Medicine bottle caps and closures
- Packaging caps requiring consistent sealing and clean appearance
Manufacturing Capabilities
Production Processes
- High-precision CNC milling and contour machining
- EDM / wire EDM for tight internal features
- Precision grinding of reference planes and parting interfaces
- Controlled heat treatment (vacuum hardening + tempering)
- Polishing to required grade specifications
Quality Standards
- Cavity-to-cavity consistency control for multi-cavity molds
- Tight control on critical sealing and cosmetic surfaces
- Verification of flatness, parallelism, and datum relations
Final achievable tolerance and finish depend on part design, steel grade, heat treatment route, and customer inspection standards. We manufacture to your drawing and inspection requirements.
Customer Benefits
Lower Scrap, Higher Output
Precision cavity plates improve cavity balance and dimensional repeatability, reducing flash, short shots, and mismatch issues in high-cavity molds.
Consistent Cap Fit & Sealing
Stable cavity geometry supports reliable thread engagement, snap-fit consistency, and sealing performance—critical for functional cap requirements.
Extended Mold Life
Appropriate steel selection and controlled heat treatment resist wear and corrosion, extending service life and supporting faster maintenance.
Premium Appearance
Proper surface finishing produces clean, high-quality caps at scale, meeting consumer packaging standards.
Quotation Requirements
For accurate and rapid quotation, please provide:
- 2D drawing + 3D file (STEP/IGES preferred)
- Required steel grade or application details for recommendation
- Target hardness and surface treatment/coating requirements
- Required tolerances and surface finish/polish grade
- Mold information including cavity count, gating type, and interface requirements
- Expected resin type and production conditions
- Quantity and delivery expectations
Our engineers can propose practical options for steel, heat treatment, and finishing based on partial specifications.
Frequently Asked Questions
What is a cavity plate in an injection mold?
A cavity plate (cavity block) is a mold component on the fixed side that contains one or multiple cavity impressions and forms the outer surface of the molded part.
What's the difference between a cavity plate and a cavity insert?
A cavity plate integrates multiple cavities into one plate, while cavity inserts are removable individual inserts. The choice depends on mold design, maintenance strategy, and cost considerations.
Which steel is best for cap mold cavity plates?
S136/1.2083 (stainless) is preferred when corrosion resistance and polishing are important (common in packaging). H13/1.2344 may be chosen for toughness/wear when corrosion exposure is low. Selection depends on resin, environment, cleaning agents, and surface finish requirements.
Do you provide inspection reports?
Yes. We provide dimensional inspection reports based on critical dimensions and your requested inspection method.
Engineering Support
Submit your 3D/2D files and molding requirements. Our engineering team will review steel selection, heat treatment, and finish options to provide a manufacturing proposal optimized for 12-cavity cap mold stability and long service life.