STAVAX Core & Sleeve Components for Plastic Injection Molds
STAVAX® core and sleeve components are precision mold parts used in plastic injection molds where corrosion resistance, high polishability, and long-term dimensional stability are essential. As a premium stainless mold steel (commonly equivalent to 1.2083 / S136 class stainless), STAVAX is widely specified for tooling that requires consistent surface quality and reliable performance in high-cycle production.
We manufacture custom STAVAX core pins, core inserts, sleeves, bushings, and matched core-sleeve assemblies according to customer drawings. From tight-fit interfaces to functional forming surfaces, each component is produced with controlled machining processes and inspection routines to support stable mold assembly, smooth part release, and reduced downtime.
Core & Sleeve System Functionality
Core and sleeve systems are commonly used in injection molds to form internal features, guide moving elements, and control fit between mating components. In many molds, the core forms key internal geometry while the sleeve provides support, guidance, protection, or secondary forming around the core area—depending on the tooling design.
Component Functions
- Form or support internal geometry and precision features
- Provide guided motion and stable alignment inside the mold
- Protect wear-prone zones and enable replaceable tooling strategies
- Maintain controlled clearances for consistent molding and ejection behavior
STAVAX Material Advantages
STAVAX is selected when molds require:
- Strong corrosion resistance (humidity, cooling water conditions, cleaning agents)
- Excellent polishability for high surface quality and stable release
- Good heat-treatment response for practical working hardness and durability
- Stable surfaces that help reduce rust-related defects and maintenance frequency
Note: Final hardness, finish level, and assembly fits are manufactured to your drawing and project requirements.
Applications
STAVAX core & sleeve components are used in plastic injection molds where stainless tooling is preferred for performance stability and surface integrity, such as:
- New mold builds requiring stainless core/sleeve parts
- Replacement components for maintenance and refurbishment
- Tooling upgrades where corrosion resistance and surface quality are priorities
- Mold designs using removable cores/sleeves to improve serviceability
Precision Manufacturing Capabilities
Manufacturing Processes
- Precision CNC turning and milling
- Surface and profile grinding for critical fits and datums
- EDM / wire EDM for special geometry (as required)
- Heat treatment coordination (vacuum hardening + tempering, per spec)
- Polishing / fine finishing for forming and sealing surfaces
- Matching and consistency control for multi-piece sets
Quality Control Measures
- Controlled fit tolerances between core and sleeve interfaces
- Concentricity/runout control for coaxial features
- Datum-based machining for repeatable assembly
- Surface finish management for functional contact zones
- Inspection reporting for critical dimensions upon request
Documentation Options
- Dimensional inspection report (FAI/CMM report available)
- Material certificate and heat treatment record (upon request)
- Marking and traceability support for set management
Customer Value & Benefits
Improved corrosion resistance, less downtime
STAVAX helps reduce rust-related surface damage and frequent re-polishing, supporting longer continuous production.
Stable surface quality and part release
Better polishability and surface stability can improve release behavior and reduce process disruptions caused by surface defects.
Reliable fit and repeatable assembly
Precision-machined datums and controlled clearances help ensure consistent performance—especially for molds that require frequent maintenance and part replacement.
Longer service life in demanding environments
With proper heat treatment and finishing, STAVAX components can deliver durable performance under high-cycle molding conditions.
Quotation Requirements
To quote STAVAX core & sleeve components accurately, please provide:
- 3D CAD (STEP/IGES) + 2D drawing (PDF/DWG)
- Component list (core pin, core insert, sleeve, bushing, retainer, etc.)
- Material requirement: STAVAX (confirm acceptable equivalents if any)
- Target hardness / heat treatment specification (if defined)
- Surface finish / polishing requirement for forming surfaces
- Critical dimensions and GD&T (datums, fits, runout, sealing zones)
- Quantity (single parts or matched sets) and target lead time
- Inspection/document requirements (FAI, CMM report format, traceability)
If these are replacement parts, providing mating interface dimensions helps ensure drop-in compatibility.
Frequently Asked Questions
Are you a manufacturer or trading company?
We are a custom precision mold components manufacturer, producing parts with CNC machining, EDM, grinding, and finishing.
Do you manufacture strictly to drawings and tolerances?
Yes. We produce based on your drawings, GD&T, and datum references. If tolerances are not specified, we can propose a practical tolerance plan for approval.
Can you provide inspection reports and material certificates?
Yes. Inspection reports and material/heat treatment certificates can be provided upon request.
Why is STAVAX commonly chosen for mold cores and sleeves?
Because it offers a strong combination of corrosion resistance and polishability, supporting stable surfaces and lower maintenance in demanding molding environments.
Can you make matched sets for multi-cavity molds?
Yes. We can manufacture multiple sets with controlled consistency and provide inspection data for key dimensions.
What are the most critical areas on a core & sleeve assembly?
Typically the mating fits, coaxial features (runout/concentricity), forming surfaces, and datums—because they control alignment, clearance, and molding stability.
Engineering Call to Action
Send your STEP + 2D drawings and indicate critical datums, fits, and finish requirements. We'll review manufacturability and provide a production plan for STAVAX core & sleeve components.
