HTX MIM Mold Components | Precision Ejector Pins & Guide Bushings
HTX Metal Injection Molding Industry Solutions
Discover HTX custom ejector pins, guide bushes, and mold components for metal injection molding (MIM). Overcome sticking, pin marks, heat, and shrinkage with precision-engineered solutions.
Industry Overview & Challenges in MIM
Metal Injection Molding (MIM) enables production of micro-sized, complex metal parts with high density (95–99%) and exceptional surface finish—ideal for medical, automotive, and electronics components.
However, MIM tooling presents unique challenges:
Shrinkage & Dimensional Variability: Parts shrink during debinding/sintering, typically ~15% per dimension
- Sticking & Binding: Complex geometries and small sizes raise risk of binder residue, adhesion, and sticking.
- Ejector Pin Marks & Deformation: Thin-walled or micro features are highly sensitive to pin marks, denting or cracking.
- Wear & Breakage in Tiny Pins: Small ejector pins break more easily unless made from high-grade steel and properly treated.
- Thermal & Debris Management: Binder burn-off, part cooling, and cycle sync complicate tool design.
HTX Tailored Solutions for MIM
We deliver custom-engineered mold components that address each of the challenges above, using high-grade materials, precision machining, and optimized heat treatment.
- Material Selection: Use SKH51 or M2 high‑speed steel with hardness up to 64 HRC for superior wear resistance in fine pin
- Surface Finish & Coating: Mirror polish and optional DLC/TiN coatings reduce friction and stick-mark risk
- Precision Small-Diameter Pins: CNC-machined to ±0.005 mm tolerance, designed for minimal pin indentation and stable ejection force.
- Miniature Precision: CNC milled guide bushes for robust alignment in micro-cavity dies.
- Low Friction Operation: Coatings and surface polishing help prevent binding in small tolerances.
- Regular Maintenance Programs: HTX offers scheduled replacement and cleaning workflows to sustain precision and uptime.
- Pin Placement Strategy: Pins placed on rib intersections, pads or bosses to balance force and avoid thin walls or appearance surfaces
- Draft Angle Optimization: Recommend at least 1–3° draft to ensure clean ejection.
- Balanced Ejection Layout: Evenly distributed pins to prevent warping or crack formation
- Cooling & Debinding Sync: Mold-flow studies and synchronized cooling cycles support consistent shrinkage behavior and smooth ejection.
How HTX Delivers – Process Breakdown
Precision Manufacturing.End-to-End Solutions. 20+ Years of Precision Manufacturing | OEM/ODM Customization | Micron-Level Tolerance | 100% Inspection | Global Delivery in One Streamlined Solution
1. Consultation
Accept part drawings, CAD, or photo samples—even without precise dimensions. We assess the sintering shrink factor and suggest geometry adjustments.
4. Treatment & Coating
Heat-treated high-speed steel components, optional DLC/TiN; surface hardness up to 64 HRC.
2. DFMEA & Simulation
Provide recommendations for ejector layout, draft angle, bushing location, and material based on simulation.
5. Inspection
CMM and projector inspection; ensure no cracks or surface blemishes, pin marks held under acceptable levels.
3. Precision Production
Use CNC grinding/EDM for small pins and guide bushes to tolerances of ±0.005 mm or better.
6. Trial & Adjustment
Assist with mold trial feedback, adjusting pin layout or force to mitigate sticking or deformation.
Why Choose HTX for MIM Tooling
Micro‑precision Factory: Specializing in micro mold components, no minimum order demands.
Advanced Materials & Engineering: SKH51, M2 + DLC/PVD coatings.
Technical Support Included: We assist from concept through trial with mold-flow guidance.
Rapid Turnaround: Prototype and small run parts within 7–10 business days.
Global Export Ready: Cleaned parts, sealed exporting, DDP/DDU shipping options.
Premium Materials
Imported Swedish steel ensures stable performance and longer lifespan.
High Precision
±0.002mm tolerance for perfect mold fit , save time and cut costs.
13-Step Inspection
ISO-controlled quality checks from start to finish, with a 99.8% pass rate.
Fast Delivery
Daily output of 50,000+ pieces , faster lead time than competitors.
Full Custom Service
One stop solution from drawing to delivery
·Mirror polishing, wire EDM, cylindrical grinding, CNC finishing
·Surface treatments: nitriding, DLC/TiCN coatings, PVD
·Heat treatment control for hardness and toughness balance
·Tolerance control down to ±0.002mm
·Non-standard diameters, lengths, head shapes
·Special geometries (step punches, reverse tapers, custom flats)
·Tolerances for precision dies, medical tools, and high-speed stamping
·Batch customization for small & large volumes
·Tool steels: SKD61, DC53, HSS, M2, ASP23
·Stainless steels: 420, SUS304, 316L
·Carbide grades for extreme wear resistance
·Medical-grade materials (e.g. Ti6Al4V, CoCrMo)
·Guide post and guide bush matching
·Punch & die set tolerance fit (clearance optimization)
·Ejector pin and sleeve integration
·Progressive die, compound die, or injection mould matching
·Automotive stamping<br> ·Medical implant production<br> ·Electronic connector tooling<br> ·Home appliance metal parts<br> ·High-speed progressive dies
Quote Request Checklist
Material Specifications
Tolerance Requirements
Surface Treatment
Application Scenario
Drawing Availability (If none, describe)
The more details you share, the faster and more precise your quote will be! Looking forwarded to future cooperation.
Request a Quote
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