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Flash & Gate Removal: Excess material (flash) and sprue/gate residues must be trimmed using manual cutting, robotic trimming, or cryogenic deflashing (freezing and tumbling).
Surface Smoothing: Sanding or tumbling may be required for aesthetic or functional parts.
Polishing/Sandblasting: Enhances appearance and texture.
Painting/Coating: Improves UV resistance, color consistency, or chemical resistance.
Plating (Electroplating/Vacuum Metallizing): Used for decorative or conductive parts (e.g., automotive trims, electronic housings).
Ultrasonic Welding: Bonds plastic parts without adhesives.
Laser Etching/Engraving: Adds permanent markings (logos, serial numbers).
Manual Measurement: Calipers, micrometers.
Automated Inspection: CMM (Coordinate Measuring Machine), laser scanning, or vision systems for high-precision parts.
Appearance Checks: Detect sink marks, flow lines, burns, or color inconsistencies.
Leak Testing: For fluid containers or medical devices.
Mechanical Testing: Tensile strength, impact resistance (per ASTM/ISO standards).
Monitor production trends to ensure consistency across batches.
Anti-Static Bags: For electronic components.
Custom Trays/Foam Inserts: Prevent damage during shipping.
Vacuum Sealing: Reduces oxidation for sensitive parts.
Barcodes/QR Codes: For inventory and batch tracking.
Material & Compliance Labels: FDA, RoHS, REACH, or medical-grade certifications.
Ethylene Oxide (EtO): For heat-sensitive plastics.
Autoclaving (Steam): Requires high-temperature-resistant materials like PEEK or PC.
Gamma Radiation: Used for disposable medical devices.
Thermal Cycling: Simulates extreme temperature conditions.
UV Exposure Testing: Ensures outdoor durability.
Cleaning & Lubrication: Prevents corrosion and sticking.
Wear Inspection: Check ejector pins, cavities, and slides for damage.
Process Documentation: Record cycle times, defects, and maintenance actions.
Certificates of Analysis (CoA): Include critical test results.
Material Certifications: FDA, USP Class VI, ISO 10993 (if applicable).
Safe Transportation: Use shock-absorbing packaging for fragile parts.
✅ Warping/Shrinkage? → Use annealing (heat treatment) to relieve internal stresses.
✅ Batch Variations? → Monitor injection parameters (pressure, temperature, cooling time).
✅ Regulatory Compliance? → Ensure materials meet industry standards (e.g., medical, automotive).
Post-molding processes are just as critical as the injection molding itself. Proper handling ensures product reliability, safety, and customer satisfaction.
