Quality Control

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Quality control of stretch and extrusion blow moulding machines is crucial for ensuring plastic bottles meet set quality standards and customer requirements, impacting product consistency, safety, and functionality.

  • Incoming Material Inspection
    • Resin Quality

      Checks for polymer quality (e.g., PET, PE) for parameters like melt index, viscosity.

    • Additives

      Standard-compliant additives like color masterbatch and stabilizers to guarantee end product quality.

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    Equipment Calibration & Maintenance
    • Routine maintenance

      Regularly inspect and maintain blow moulding machines for optimal operation.

    • Calibration

      Key components calibrated, including temperature controllers and pressure sensors.

  • Control of Equipment Parameters
    • Temperature Control

      Precisely managed heating section temperatures for uniform plastic melt.

    • Blow Pressure

      Air pressure during blow moulding process within set parameters to guarantee bottle diameter and shape.

    • Cooling Time

      Control cooling time controlled to prevent bottle deformation after forming.

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  • Online Inspection & Monitoring
    • Visual Inspection

      Real-time monitoring for bottle appearance, detecting defects like black spots, bubbles, or scratches.

    • Dimension Measurement

      Measurement for key bottle dimensions (e.g., neck diameter, height, wall thickness).

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    Random Inspection of Products
    • Mechanical Performance Testing

      Bottles checked for mechanical properties like tensile and compression strength.

    • Sealing Performance Test
      Bottles tested for sealing performance to ensure no leakage during filling and transport.
    • Thermal Stability Test

      Bottle checked for stability under high temperatures to ensure that it does not deform in use.

  • Data Recording & Analysis
    • Production Records

      Document production parameters and inspection results for each batch to build complete quality archive.

    • Data Analysis
      Regularly analysis on quality data to identify potential problems and improve overall quality.
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    Quality Improvement
    • Continuous Training

      Continuous operator training to enhance skills and quality awareness.

    • Feedback Mechanism
      Customer feedback mechanism established to address quality concerns.
    • Continuous Improvement

      PDCA (plan-do-check-action) cycle for ongoing quality process enhancement.

  • Periodic Evaluation
    • Customer Satisfaction Surveys

      Product quality assessment and service through customer feedback.

    • Quality Cost Analysis
      Cost evaluation related to quality issues (e.g., reworking, waste products, complaints) for the economic benefits of quality control
    • Quality Audits

      Regular internal and external quality audits to ensure effectiveness and compliance.

    • Quality Control