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From CAD to Reality: JINGYING’s Complete OEM Process for American Client’s Custom Earring Production

Posté le par Joyjy

From CAD to Reality: JINGYING’s Complete OEM Process for American Client’s Custom Earring Production

Executive Summary

This 5,000-word technical whitepaper documents JINGYING Jewelry Manufacturing’s end-to-end OEM service for a U.S.-based fashion brand’s custom earring collection. The case study examines how an American client’s CAD designs were transformed into 12,000 pairs of finished earrings, highlighting:

  • Cross-border design collaboration protocols

  • Technical adaptations for mass production

  • Quality assurance systems meeting U.S. market standards

  • Logistics solutions for trans-Pacific jewelry shipping

Table des matières

  1. Project Initiation Phase

    • 1.1 Client Profile: U.S. Fashion Brand Requirements

    • 1.2 Design Handoff: CAD File Analysis & DFM Review

    • 1.3 Regulatory Compliance Planning (CPSIA, Prop 65)

  2. Pre-Production Engineering

    • 2.1 CAD Optimization for Manufacturing

    • 2.2 Sélection des matériaux & Sourcing Strategy

    • 2.3 Prototyping Process (3D Printing vs. Hand Samples)

  3. Production Execution

    • 3.1 Metal Fabrication Techniques

    • 3.2 En pierre & Surface Finishing

    • 3.3 Quality Control Checkpoints

  4. Conditionnement & Compliance

    • 4.1 U.S. Conditionnement & Labeling Requirements

    • 4.2 Hazardous Materials Testing

    • 4.3 Export Documentation

  5. Logistics & Delivery

    • 5.1 Air vs. Ocean Shipping Cost Analysis

    • 5.2 Customs Clearance Strategies

    • 5.3 Inventory Management for Multi-Shipment Orders

  6. Post-Production Evaluation

    • 6.1 Defect Rate Analysis

    • 6.2 Client Feedback Implementation

    • 6.3 Process Improvements for Future Orders

1. Project Initiation Phase

1.1 Client Profile

The Massachusetts-based client requested:

  • Produit: 925 silver geometric drop earrings with cubic zirconia

  • Quantité: 12,000 couple (4 color variants)

  • Delivery: 3 shipments over 8 mois

  • Certifications: Must comply with California Proposition 65

1.2 CAD File Analysis

JINGYING’s engineering team identified 3 required modifications:

  1. Prong Thickness Adjustment (Original 0.3mm → Modified 0.5mm for durability)

  2. Hinge Mechanism Redesign (For easier assembly)

  3. Weight Reduction (From 8.2g to 6.5g per earring)

Tableau: CAD Design vs. Production-Ready Comparison

Design Element Original CAD Modified Version Reason
En pierre 4-prong 6-prong Security improvement
Post Length 7MM 8MM U.S. piercing standard
Surface Finish Mat Brushed Better scratch resistance

1.3 Compliance Documentation

  • Conducted RHOS testing for silver alloy

  • Prepared CPSIA tracking labels

  • Verified nickel content below 0.05%

2. Pre-Production Engineering

2.1 Rapid Prototyping Process

  • Produced 4 prototype versions using:

    • SLA 3D printing (For form verification)

    • Lost-wax casting (For metal samples)

    • Hand-fabricated samples (For mechanism testing)

Prototyping Timeline

3. Production Execution

3.1 Manufacturing Workflow

  1. Silver Casting

    • Used vacuum casting machines

    • Achieved 92% material utilization rate

  2. Automated Polishing

    • Implemented robotic polishing arms

    • Reduced hand-polishing time by 65%

  3. Laser Stone Setting

    • Precision CZ placement with 0.1mm tolerance

    • 0.3% stone loss rate (Industry average: 1.2%)

3.2 Quality Control Metrics

  • Précision dimensionnelle: ±0.15mm

  • Stone tightness: 50g pull test

  • Surface defects: <0.5% allowance

4. Packaging Solutions

4.1 Custom Packaging Components

  • Recyclable PET blister cards

  • Soy-based ink printing

  • Multilingual care instructions

Packaging Cost Breakdown

Component Cost per Unit Notes
Blister Card $0.18 Custom die-cut
Polybag $0.05 Prop 65 warning printed
Barcode Label $0.03 GS1-128 compliant

5. Logistics Management

5.1 Shipping Cost Comparison

Method Cost Transit Time Insurance
Air Express $8,400 5 jours 110% coverage
Ocean LCL $3,200 28 jours Basic coverage
Hybrid Air-Ocean $5,100 14 jours Full coverage

Selected hybrid solution with:

  • First batch via air (for market testing)

  • Subsequent shipments via ocean

6. Key Performance Indicators

6.1 Production Efficiency Metrics

  • First-pass yield rate: 94.7%

  • On-time delivery: 100%

  • Return rate: 0.8% (Mostly for minor finish issues)

Conclusion

This project established JINGYING’s capability to:

  1. Accurately interpret Western design aesthetics

  2. Implement design-for-manufacturing improvements

  3. Maintain rigorous U.S. compliance standards

The successful partnership has led to:

  • 30% cost reduction versus client’s previous manufacturer

  • 15% faster production cycle time

  • Ongoing contract for 5 new designs