Technical Inputs
Confirm customer drawings, 3D models, samples and technical specifications.
Quality Assurance at
Every Stage of Manufacturing
From material inspection and mold manufacturing to injection molding, product assembly, and final inspection, we apply defined quality controls throughout the production process
- Full Process Control
- Reliable Quality
- Global Support
Quality Management
System & Certifications
We operate a standardized quality management system. All inspections, tests and production records are documented and traceable, ensuring consistent quality and meeting international standards.
01
QUALITY MANAGEMENT SYSTEM CERTIFICATE
02
ENVIRONMENTAL MANAGEMENT SYSTEM CERTIFICATE
03
AUTOMOTIVE QUALITY MANAGEMENT SYSTEM CERTIFICATE
04
SOCIAL RESPONSIBILITY AUDIT REPORT
05
SILVER | Top 15%
End-to-End Quality Control Process
Full-process quality control from project review to mass production delivery · Click any step to view its details
01
Customer Requirements Review
02
Project Review & DFM
03
Incoming Material Inspection
04
Mold Manufacturing & Inspection
05
Mold Trial & Product Validation
06
Sample Approval & Production Release
07
Injection Molding & Assembly Control
08
Final Inspection & Shipment Release
09
Customer Feedback & Improvement
Quality Control Details
Explore the quality controls, inspection methods and project records at each stage. Select a topic below or a process step above.
Customer Requirements & Project Quality Planning
Quality starts with a shared understanding of your requirements. Engineering reviews turn project information into a clear, traceable inspection plan.
Drawing & Material Standards
Confirm drawing revisions, dimensional tolerances, material grades and appearance standards.
Design for Manufacturing
Review manufacturability and mold structure through DFM analysis.
Critical Quality Features
Identify critical dimensions, special performance requirements and potential quality risks.
Inspection & Test Planning
Define the project inspection plan, test requirements and quality delivery document checklist.
Responsibilities & Changes
Clarify quality responsibilities, review records and change approval requirements.
Engineering Drawing ReviewDFM AnalysisQuality Risk AssessmentInspection Planning
Incoming Material & Supplier Quality Control
Incoming materials and purchased components are checked before production, with inspection status and batch identification maintained throughout handling.
Mold Steel Inspection
Steel grade, material certificates, dimensions, appearance, hardness and applicable internal quality testing.
Inspection recordMaterial certificate, incoming steel inspection and applicable test results
Plastic Raw Material Inspection
Material grade, batch number, color, packaging, storage conditions and necessary material documentation.
Inspection recordMaterial certificate, batch label and incoming material inspection
Hardware Inspection
Specifications, dimensions, threads, surface treatment, assembly fit and batch management.
Inspection recordDimensional / visual inspection and batch identification
Supplier & Material Management
Supplier evaluation, incoming inspection status, material identification and isolation of nonconforming materials.
Inspection recordSupplier evaluation and material status / disposition records
Separate, review, release
Identify and isolate nonconforming materials. Confirm the affected batch, record the disposition and reinspection results, and release only after the required review and authorization.
Mold Manufacturing & In-Process Quality Inspection
Quality checkpoints follow the mold from design review through precision machining, component inspection and final assembly.
Mold Design Review
Mold structure, parting surfaces, gates, venting, cooling and ejection systems.
- Inspection method
- Review drawings, 3D models and DFM findings.
- Corresponding record
- Design review / DFM record
CNC Machining
Datums, critical dimensions, machining allowance and surface condition.
- Inspection method
- Dimensional and visual inspection against the drawing.
- Corresponding record
- In-process dimensional inspection record
EDM Machining
Electrodes, cavity profiles, machining position and surface quality.
- Inspection method
- Check electrode / cavity dimensions, position and surface condition.
- Corresponding record
- EDM inspection record
Wire EDM
Insert dimensions, positional accuracy and mating fit.
- Inspection method
- Measure applicable features and verify mating fit.
- Corresponding record
- Wire EDM / fit inspection record
Heat Treatment
Applicable heat treatment records, hardness and necessary deformation checks.
- Inspection method
- Review treatment records and applicable hardness / deformation results.
- Corresponding record
- Heat treatment and hardness records
Mold Component Inspection
Dimensions, tolerances, geometric accuracy and mating surfaces.
- Inspection method
- Use suitable dimensional / geometric inspection methods for each feature.
- Corresponding record
- Component inspection report
Mold Assembly
Inserts, slides, lifters, ejector pins, guidance and reset action.
- Inspection method
- Check component fit and verify mechanical movement / reset.
- Corresponding record
- Assembly inspection checklist
Pre-Trial Review
Mold operation, cooling circuits, venting and applicable hot-runner checks.
- Inspection method
- Perform the applicable pre-trial operational checks.
- Corresponding record
- Pre-trial inspection checklist
Project-specific inspection scope
Inspection methods and records follow the agreed quality plan. Equipment and methods used for a project must reflect actual available capability.
Inspection Equipment & Measurement Capabilities
Measurement methods are selected for the part, feature and tolerance being inspected, with corresponding inspection records.
CMM
- Inspection purpose
- Applicable part dimensions and geometric features.
- Record / output
- Dimensional / geometric inspection report
2D / 3D Optical Measurement
- Inspection purpose
- Dimensions and profiles of applicable components.
- Record / output
- Optical measurement record
Hardness Testing
- Inspection purpose
- Hardness of applicable mold steel.
- Record / output
- Hardness test record
Surface Roughness Measurement
- Inspection purpose
- Specified surface finish on applicable parts.
- Record / output
- Surface roughness record
Precision Measuring Tools
- Inspection purpose
- Dimensions using calipers, micrometers and height gauges.
- Record / output
- Dimensional inspection record
Moldflow Analysis
- Analysis purpose
- Molding flow and warpage simulation.
- Record / output
- Simulation analysis report
Measurement assurance
Calibration or verification, equipment maintenance and operator procedures support reliable measurement. Equipment photographs alone do not demonstrate measurement capability.
Mold Trial, Product Testing & Sample Validation
From the first mold trial to approved samples, validation connects measured results with the agreed product requirements.
Pre-Trial Inspection
Check the mold, raw materials, equipment and test preparations.
Mold Trial Validation
Record applicable molding parameters, appearance issues and molding status.
Dimensional Inspection
Inspect critical dimensions and tolerances against the drawings and inspection plan.
Appearance Inspection
Check applicable short shots, flash, shrinkage, warpage and color differences.
Functional & Performance Validation
Perform assembly, tensile strength, torque, temperature resistance or other tests according to customer requirements.
Issue Rectification
Record the issue, cause, corrective actions and reinspection results.
Sample Confirmation
Complete required internal validation and customer confirmation before approving mass production.
Sample validation records
Mold Trial ReportDimensional Inspection ReportProduct Performance Test ReportSample Approval RecordCorrective Action Record
Injection Molding & Assembly Quality Control
Defined process settings, cavity checks and assembly inspections help maintain consistent quality during production.
Injection Molding
Production Preparation
Verify the order, mold, materials, equipment and process documents.
First-Article Inspection
Check appearance, critical dimensions, color and specified functions.
Routine Molding Inspection
Inspect product quality and molding status according to the inspection plan.
Process Parameter Monitoring
Control specified temperature, pressure, speed, holding time and cooling settings.
Multi-Cavity Consistency
Verify consistency using cavity identification and the inspection plan.
Two-Shot Molding
Material & Bonding Checks
Inspect material bonding, overmold integrity and applicable performance requirements.
Insert Molding
Insert & Encapsulation Checks
Verify insert positioning, encapsulation integrity and applicable performance requirements.
Product Assembly
Assembly Quality
Check part models, assembly sequence, fit and missing or incorrect installation.
Functional Inspection
Perform specified operations and assembly verification for the product functions.
Abnormality isolation
Label and isolate nonconforming products, analyze the issue and reinspect after disposition. Maintain traceability of affected batches and inspection results.
Final Inspection & Shipment Quality Release
Finished products are checked against the order, inspection plan and packaging requirements before authorized shipment release.
- Verify product model, drawing revision and order information.
- Inspect appearance and specified dimensions.
- Perform applicable assembly and functional inspection.
- Verify production, accepted and packaging quantities.
- Check labels, batch numbers, packaging and protective requirements.
- Verify quality documents required by the customer.
- Have authorized personnel review results and release for shipment.
Authorized quality release
Shipment follows completion of the required inspection and document review.
Supporting shipment records
Final Inspection ReportPre-Shipment Inspection ReportProduct Traceability RecordPackaging Inspection Checklist
Quality Reports & Project Documentation
Project records connect material traceability, mold manufacturing, sample validation and shipment inspection in one documentation package.
Material Quality Documents
Steel material certificates, plastic raw material certificates and applicable heat treatment reports.
Mold Manufacturing Documents
Mold component dimensional reports and mold inspection records.
Mold Trial Documents
Trial reports, molding issue records and rectification verification records.
Product Quality Documents
Dimensional reports, appearance inspection reports and applicable performance test reports.
Production & Shipment Documents
First-article inspection records, final inspection reports and shipment inspection records.
Quality Improvement Documents
Nonconformance reports, corrective action reports and effectiveness verification records.
Controlled project documentation
Select gallery images to enlarge. Public examples are illustrative; customer files and downloadable samples require disclosure permission. Only completed, applicable inspection and test records form part of the project documentation.
Nonconformance Management & Continuous Improvement
Quality deviations follow a defined containment, root-cause analysis and corrective-action process, with verification before closure.
Identify
Record issues found during incoming inspection, machining, mold trials, production or shipment inspection.
Contain
Identify nonconforming products, confirm the affected scope and prevent further flow.
Analyze
Use appropriate methods to investigate and confirm the root cause.
Correct
Assign responsible owners, completion deadlines and specific improvement actions.
Verify
Confirm that the product meets requirements again and that corrective actions are effective.
Improve
Archive records and update relevant standards, processes, training or mold maintenance requirements.
Quality Coordination & Engineering Support
Engineering and quality teams coordinate requirements, resolve technical issues and support stable production throughout the project.
Project Quality Communication
Clarify customer requirements, inspection standards and delivery documentation.
Engineering Issue Resolution
Analyze and resolve mold, molding, dimensional and assembly issues.
Continuous Quality Support
Support mold maintenance, quality follow-up and improvements within the agreed cooperation scope.
Full Process Quality Control
From design to mass production, every step is strictly controlled to ensure the best quality.
01
Requirement Review
Receive drawings and assess feasibility.
02
DFM Analysis
Structure, materials and molding risk analysis (including Moldflow).
03
Mold Development
Precise design, processing and assembly.
04
T0 Trial Confirmation
T0 trial, inspection and sample confirmation.
05
Mass Production Approval
Verify production stability, consistency and quality.
06
Production & Delivery
Mass production and on-time delivery.
Inspection Equipment & Laboratory Capabilities
We use advanced inspection equipment to ensure every mold and component meets precision requirements.
CMM
Three-dimensional coordinate measuring
2D/3D Optical Measuring Instrument
Dimension and profile measurement
Hardness Tester
Steel hardness testing
Surface Roughness Tester
Surface finish measurement
Precision Measuring Tools
Calipers, micrometers, height gauges, etc.
Moldflow Analysis Software
Molding flow and warpage analysis
Mold Delivery Documentation Package
Each mold is delivered with a complete set of quality documents for customer reference and future production.
2D Drawings 3D Mold Model
Mold Parts BOM List
Mold Steel Material Certificate
Dimensional Inspection Report
Trial Report & Sample Data
Maintenance Manual & Spare Parts List
- NONCONFORMITY & IMPROVEMENT
Nonconforming Product Handling & Continuous Improvement
Root-Cause Analysis and Corrective Action
When quality deviations occur, we apply the 8D methodology to identify root causes and implement corrective and preventive actions (CAPA). All issues and lessons learned are documented to prevent recurring problems in future projects.
Identify
Analyze the issue and find the root cause.
Correct
Implement corrective actions (CAPA).
Prevent
Standardize and avoid recurrence.
- QUALITY SERVICE SUPPORT
Quality Coordination & Global Technical Support
Dedicated Project Quality Coordination
Each project is assigned a dedicated quality contact who coordinates quality activities, synchronizes inspection information at every stage, and promptly communicates and resolves quality issues.
Global Collaborative Support
Our engineering and quality teams at the China headquarters work closely with the Mexico manufacturing facility & the local technical team at our Germany office to provide coordinated support.
Ongoing Technical Support
After mold delivery, we provide mold operation guidance and molding-process technical support to help customers maintain stable mass production and achieve consistent long-term performance.
Quality You Can Rely On, From Design to Delivery
We control the entire mold manufacturing process from DFM design to mass production, ensuring stable quality, high precision and on-time delivery.
+86 18926919975
18926919975
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info@zhjingmu.com
- Contact Us