Plastics : Comprehensive breakdown of Quality parameters in plastic manufacturing

Below is a detailed breakdown of quality parameters in plastic manufacturing.

Surface Finish:

• Gloss level
• Texture consistency
• Orange peel effect
• Flow lines
• Surface roughness
• Polish quality
• Matt finish uniformity
• Aesthetic defects

Color Consistency:

• Color matching
• Batch-to-batch variation
• Color distribution
• Streaking (Color defect in plastic or uneven color mixing)
• Color stability
• Pigment dispersion (Mixing color evenly in plastic)
• Opacity/transparency
• UV stability

Contamination:

• Black specs
• Foreign particles
• Material cross-contamination
• Degraded material
• Moisture issues
• Oil contamination
• Metal particles
• Environmental debris

Void Content:

• Air traps
• Sink marks
• Bubbles
• Internal voids
• Density variations
• Structural integrity
• Porosity
• Wall thickness uniformity

Weld Lines:

• Strength at weld lines
• Visual appearance
• Position consistency
• Structural integrity
• Color matching
• Surface finish
• Flow patterns
• Design impact

Flash:

• Flash extent
• Thickness
• Location
• Removability
• Prevention
• Edge quality
• Mold fit
• Part clearance

Warpage:

• Dimensional stability
• Flatness
• Twist
• Bow
• Part alignment
• Assembly fit
• Stress distribution
• Cooling effects

Dimensional Accuracy:

• Critical dimensions
• Tolerances
• Shrinkage control
• Part consistency
• Geometric accuracy
• Feature location
• Measurement systems
• Process capability

Visual Defects:

• Burn marks
• Flow marks
• Knit lines
• Gate blush
• Discoloration
• Dull spots
• Surface scratches
• Uniformity

Structural Integrity:

• Load bearing capacity
• Impact resistance
• Stress distribution
• Material bonding
• Part rigidity
• Assembly strength
• Fatigue resistance
• Design conformance