Dimensional &
Visual Inspection
Every silicone part leaves our factory only after passing a rigorous dimensional and visual inspection protocol. From critical tolerances to surface finish, our QC team ensures every piece meets your brand's standards.
Critical Dimensions &
Tolerance Standards
We define critical control points (CTQ) on every drawing and inspect them against documented tolerance bands aligned with ISO 3302-1 M-class standards.
Critical sealing surfaces, mating interfaces, and functional geometries.
Standard body dimensions, wall thickness, and non-critical features.
Draft angles, chamfers, and geometric orientations.
Durometer control across batches for consistent feel & function.
Custom tolerance per drawing
Tighter tolerances available for high-precision applications -- share your CAD files & GD&T callouts.
Calipers, Gauges &
Specialized Fixtures
Digital Calipers & Micrometers
0.01mm resolution Mitutoyo instruments for linear and depth measurements.
- • 0-150mm / 0-300mm ranges
- • Annual calibration certificates
- • Operator-dedicated units
Go / No-Go Gauges
Custom-built pass/fail fixtures for high-volume production checks.
- • Thread & bore gauges
- • Snap & plug gauges
- • Rapid in-line verification
Optical Projectors
2.5D vision measurement for complex contours and small features.
- • Non-contact measurement
- • Contour comparison
- • Edge detection accuracy
Shore Durometers
Shore A & Shore 00 scales for silicone hardness verification.
- • Calibrated per batch
- • Multi-point sampling
- • Record logged in QC report
Custom Check Fixtures
Dedicated jigs for assembly verification and functional fit.
- • Project-specific tooling
- • Mating-part simulation
- • Reduced inspection time
Precision Balances
Weight verification to detect short-shots or material inconsistencies.
- • 0.01g resolution
- • First-shot verification
- • SPC trend monitoring
Deformation, Flash &
Parting Line Checks
Molding artifacts can compromise both function and aesthetics. Our QC team evaluates each part against documented defect criteria with clear acceptance limits.
Deformation
Check warpage, shrinkage, and dimensional stability post-cure.
Flash & Burrs
Trim quality inspection on all parting lines and gate residues.
Parting Line
Verify mold-split lines are smooth, aligned, and within aesthetic limits.
Short Shots
Detect incomplete filling, voids, and sink marks through visual & weight checks.
Bonding & Co-molding Integrity
For multi-material parts, verify adhesion between silicone and plastic/metal substrates.
Color, Stains &
Surface Defect Standards
Visual inspection is performed under standardized D65 lighting (1000 lux) at 30cm distance, following AQL 2.5 for major defects and AQL 4.0 for minor defects.
Color Consistency
- -- Pantone / RAL matching with master swatches
- -- ΔE ≤ 1.5 under D65 lighting
- -- Batch-to-batch verification
Stains & Contamination
- -- No oil residue, dust, or fingerprints
- -- No foreign particles embedded
- -- Food-grade cleanliness enforced
Surface Texture
- -- Mold finish matches SPI/VDI standard
- -- No scratches, bubbles, or craters
- -- Consistent gloss & haptic feel
First-Article, In-Process &
Final Inspection
First Article (FAI)
Comprehensive measurement of the first production part against the full dimensional specification before mass run approval.
- • All critical dimensions reported
- • Signed off before mass production
- • FAI report shared with client
In-Process Patrol
Hourly sampling throughout production, verifying key dimensions and visual quality remain within control limits.
- • Every 1-2 hours, each machine
- • SPC trend monitoring
- • Immediate corrective action
Final / Outgoing (OQC)
AQL-based sampling of finished goods before packing to confirm batch meets client specification and quality.
- • AQL 2.5 / 4.0 sampling
- • 100% visual for premium orders
- • QC report with shipment
Records, Boundary Samples &
Judgment Consistency
Every inspection decision is traceable. We maintain a shared visual language between our QC team and your brand to ensure consistent judgment across every batch.
Inspection Records
Full QC reports retained for 24 months -- dimensional data, defect counts, operator signatures, and photos.
Boundary Samples (Golden Samples)
Client-approved reference parts labelled "accept" and "reject" -- used for daily operator calibration.
Judgment Consistency
Monthly QC calibration meetings & written SOPs ensure every inspector applies the same acceptance criteria.
Share your drawings &
inspection requirements
Send us your CAD files, GD&T callouts and AQL preferences. We'll return a full inspection plan tailored to your product within 48 hours.
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Emailedwin@gd-yums.com
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Phone / WhatsApp+86 13418983587
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FactoryDongguan, Guangdong, China