STAVAX Core and Sleeve Components for Plastic Injection Molds with Corrosion Resistance, High Polishability, and Long-Term Dimensional Stability

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 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.

• 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 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

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

STAVAX components often require tight tolerances and high-quality finishing. We combine machining and finishing processes to meet demanding mold requirements.

• 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

• 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

• Dimensional inspection report (FAI/CMM report available)
• Material certificate and heat treatment record (upon request)
• Marking and traceability support for set management

STAVAX helps reduce rust-related surface damage and frequent re-polishing, supporting longer continuous production.

Better polishability and surface stability can improve release behavior and reduce process disruptions caused by surface defects.

Precision-machined datums and controlled clearances help ensure consistent performance—especially for molds that require frequent maintenance and part replacement.

With proper heat treatment and finishing, STAVAX components can deliver durable performance under high-cycle molding conditions.

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.

We are a custom precision mold components manufacturer, producing parts with CNC machining, EDM, grinding, and finishing.

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.

Yes. Inspection reports and material/heat treatment certificates can be provided upon request.

Because it offers a strong combination of corrosion resistance and polishability, supporting stable surfaces and lower maintenance in demanding molding environments.

Yes. We can manufacture multiple sets with controlled consistency and provide inspection data for key dimensions.

Typically the mating fits, coaxial features (runout/concentricity), forming surfaces, and datums—because they control alignment, clearance, and molding stability.