100% Customization per Drawing

Mold Accessories

Precision mold accessories — SWF/SWL/SWM/SWH coil springs, ISO 11901 gas springs, class 12.9 fasteners, cooling screw plugs, lifting eye bolts and cycle counters for injection molds. ISO 10243 / JIS B 5012 / HASCO / DME compatible, SUJ2 & chrome-vanadium steel, ±0.005 mm accuracy, MOQ 1, 3–7 day delivery.

SWF / SWL / SWM / SWH coil springs, gate cut springs & ISO 11901 gas springs
Class 12.9 hex socket bolts, h7/m6 dowel pins and cooling channel screw plugs
SGAMK spring guide pins — SUJ2 / 52100 bearing steel, HRC 55–60, Ra 0.4 µm
Swivel lifting eye bolts & heavy-duty lifting bars rated to full mold weight
±0.005 mm accuracy (critical ±0.002 mm) on an IATF 16949 certified shop floor
MOQ 1 piece — 3–7 day standard, 24–72 h urgent replacement

Download CAD / Specs

Fast Response within 2 HoursSupport STEP, IGES, DWG, PDF Files

Technical Specifications

Mold Accessories Technical Parameters & Material Specs

Product Range

Springs, Fasteners, Lifting & Counters

Coil springs, gas springs, bolts, plugs, washers, eye bolts, cycle counters

Material Grades

SUJ2 / 52100 / 50CrV4 / 12.9 Alloy

Bearing steel & chrome-vanadium for fatigue-critical parts

Precision Tolerance

±0.005 mm (critical ±0.002 mm)

Jig-ground dowels & locating features

Standards Compliance

ISO 10243 / ISO 11901 / JIS B 5012

HASCO / DME / MISUMI interchangeable dimensions

Parameter	Technical Details / Standard Values
Coil Spring Series	SWF / SWL / SWM / SWH + gate cut springs per ISO 10243 & JIS B 5012
Spring Guide Pins	SGAMK series — SUJ2/52100 bearing steel, HRC 55–60, ground Ra 0.4 µm
Fasteners & Dowels	Class 12.9 hex socket bolts, cooling screw plugs with sealing washers, thermal insulation washers, dowel pins h7/m6
Gas Springs	Compact nitrogen gas springs per ISO 11901, initial force sized F = P × A with 1.5× safety factor
Lifting & Handling	Swivel lifting eye bolts & heavy-duty lifting bars rated to total mold weight
Service Life & PM	Replacement at 500K–1M cycles; re-torque bolts at 250K cycles; gas recharge when force < 85% of rating

Need a non-standard size or special alloy core pin? We specialize in 100% custom machining according to your 2D/3D CAD drawings.

CUSTOM MACHINING CAPABILITIES

Tailored Mold Accessories Machining & Special Processing Limits

📏 Dimensional Limits

Micro & Complex Dimensions

Outer Diameter (OD): Min Ø 0.2 mm to Max Ø 50.0 mm
Pin Length: Up to 600 mm (ultra-long mold accessories supported)
Special Shapes: Stepped, tapered, flat D-cut, square head & eccentric pin tip

⚙️ Special Processes

Cooling & Deep Hole EDM

Cooling Channels: Internal water cooling holes & spiral baffle channels
Air Venting: Porous / vented mold accessories structures for gas release
Micro-EDM: Complex cavity contours, thread inserts and micro-grooves

🛡️ Surface Treatments

Advanced PVD Coatings

TiN / TiAlN: High-heat resistance for die casting molds
DLC (Diamond-Like Carbon): Ultra-low friction for dry / cleanroom molding
Nitriding Treatment: HV 900–1100 surface hardness for extended mold life

Support 100% Customization According to Your Drawings

Send us your CAD files for a free DFM (Design for Manufacturability) analysis and instant quotation.

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QUALITY ASSURANCE & INSPECTION

Rigorous Precision Inspection & Quality Control Standards

🔬 Inspection Hardware

High-Precision Testing Equipment

ZEISS CMM for complex 3D contours
Nikon optical projector & tool presetters (0.001 mm resolution)
Vickers hardness testers & surface roughness gauge

🎯 Quality Standards

Zero-Defect Quality Assurance

100% critical dimension inspection before packaging & shipment
Concentricity & runout verification under optical magnifiers
Surface micro-scratch & polish quality double-check

📜 Material Compliance

Full Material & Heat Treatment Traceability

Spectrometer material composition analysis report provided
Original Mill Test Certificate (MTC) & heat treatment logs
RoHS & REACH environmental compliance statements

Download Sample Quality Control & Inspection Reports

Review our standard CMM inspection sheet, Material Composition Certificate, and RoHS report templates.

MANUFACTURING PROCESS & LEAD TIME

Precision Machining Workflow & Reliable Delivery Timelines

Turning / Soft CNC

Precision rough turning & blank shaping

Heat Treatment

Vacuum quenching (HRC 48–62)

Rough Grinding

Centerless & OD precision grinding

Finish Grinding / EDM

Jig grinding & micro-EDM features

Surface Coating

PVD (TiN/DLC) or polishing (Ra 0.1)

100% CMM QC

Dimension check & safe packaging

📦 Standard Delivery

3–5 Working Days

For standard dimensions, off-the-shelf standard blanks, and standard SKD61/H13 materials.

🛠️ Custom Manufacturing

7–10 Working Days

For tailored CAD drawings, complex cooling channels, special coatings, or tight ±0.002 mm tolerances.

⚡ Fast-Track Option

24–72 Hours Express

Emergency mold repair green channel available for urgent downtime orders (upon CAD review).

APPLICATION & INDUSTRY SOLUTIONS

High-Performance Mold Accessories for Demanding Mold Applications

🚗 Automotive

Automotive Connector & Sensor Molds

Class 12.9 fasteners and heavy-load coil springs for high-cycle connector housings and sensor bodies, PPAP-ready with torque and fatigue documentation.

🔌 Electronics

3C Electronics & Micro-Connectors

Compact gas springs for tight ejector packs and h7/m6 ground dowel pins that hold cavity alignment on high-density pin header molds.

🩺 Medical

Medical & Cleanroom Device Molds

Corrosion-resistant stainless fasteners and sealing screw plugs plus cycle counters that support regulated preventive-maintenance schedules.

📦 Packaging

Thin-Wall Packaging & Closures

SWF/SWH springs rated to 1M cycles and gate cut springs for ultra-high-cycle multi-cavity cap and closure molding.

Key Mold Performance Challenges We Resolve:

Spring Fatigue & Ejection Failure

Load-graded SWF–SWH springs with 500K–1M cycle ratings prevent sticking parts and cavity damage at the end of service life.

Fastener Back-Out & Mold Flash

Class 12.9 bolts with correct preload and thread lock keep plates sealed — hardware-store grade bolts are the #1 cause of plate separation flash.

Lifting & Handling Safety

Eye bolts and lifting bars rated to total mold weight with safety factors protect parting-line surfaces during crane transport and maintenance.

MANUFACTURING CAPABILITY & DETAIL GALLERY

Precision Craftsmanship & Advanced Factory Hardware

Mirror Finish & Micro Polish

Ra 0.1 µm surface roughness, zero micro-burr or tool marks on pin tip.

Precision Chamfering & R-Angle

Smooth transition radii and precise lead-in chamfers per CAD specs.

PVD Coating & Nitriding Layers

Uniform TiAlN / DLC coating film thickness with high surface adhesion.

Complex Head & Tip Geometries

Precision stepped, D-cut flat, and eccentrically shaped pin profiles.

High-End Machining & Tooling Hardware:

⚡ Wire EDM

Seibu & Sodick Slow-Feed Wire Cut

Corner radius accuracy down to R0.02 mm
Surface roughness Ra 0.2 µm after wire cutting
Suitable for micro-slots, keyways, and complex pin contours

⚙️ Precision Grinding

Mitsui & WASINO Precision Grinders

Centerless & jig grinding for tight OD/length limits
Diameter tolerance controlled within ±0.001–±0.002 mm
Coaxiality & roundness ≤ 0.002 mm guaranteed

🛠️ CNC & EDM

Mikron High-Speed CNC & Sodick EDM

CNC high-speed turning & milling for blank preparation
Micro-cavity EDM for cooling channels and venting slots
Automated tool changers for high-volume consistency

ORDERING PROCESS & FREQUENTLY ASKED QUESTIONS

How to Order Custom Mold Accessories & Frequently Asked Questions

📁 Step 1

Submit CAD & Specs

Send 2D/3D drawings (STEP, DWG, PDF) with quantity, material, and tolerance requirements.

⏱️ Step 2

24H DFM & Quotation

Our engineering team conducts DFM analysis and provides a competitive quote within 24 hours.

⚙️ Step 3

Precision Manufacturing

CNC turning, vacuum heat treatment, jig grinding, and surface coating per your specifications.

✈️ Step 4

100% QC & Express Shipping

100% CMM dimensional verification, anti-rust packaging, and global air express delivery.

What is your Minimum Order Quantity (MOQ) for custom mold accessories?

We support 1-piece prototyping! Whether you need a single replacement mold accessories or bulk batch production of 10,000+ pieces, we accommodate all order volumes.

How do you guarantee material authenticity and heat treatment quality?

Every batch comes with original Mill Test Certificates (MTC) and spectral material analysis reports. Vacuum heat treatment logs (HRC hardness testing) are provided upon request.

What packaging and anti-rust protection do you apply for international shipping?

All finished mold accessories undergo ultrasonic cleaning, immersion in heavy-duty anti-rust oil, individual vacuum plastic sealing, and padded shockproof box packaging.

Can you machine non-standard custom shapes or internal cooling channels?

Yes! We specialize in complex mold accessories including stepped profiles, D-cuts, square heads, micro-EDM cavities, and internal/spiral water cooling channels per CAD specs.

Ready to Upgrade Your Mold Component Precision?

Send us your drawing today to receive a free DFM review and detailed quotation within 24 hours.

🔒 100% Confidential | NDA Protected | Instant DFM Assessment

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