Inspecting for Plastic Container Defects - METTLER TOLEDO
 

Inspecting for Plastic Container Defects

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The types of plastic empty container defects shown below are typical for bottles, tubes, cans, tubs, and jars.

Neck Measurements
(E, H & T)

Inspects the width (E - edge to edge), height (H) and thread width (T) of the bottle neck.
 Sealing Surface InspectionsSealing Surface Inspections

Detects nicks, gouges, contamination, and deformities on or in the sealing surface.
Planarity InspectionPlanarity Inspection

Planarity of container top is checked for hairs, filaments, and waviness caused by uneven cuts during the trimming process.
Ovality CheckOvality Check

Verifies that the neck of an empty container is round and dent free. Ensures the container mouth is properly oriented.
Sidewall Thickness Verification

Verifies proper wall thickness by monitoring the light transmission across the sidewalls of the container.
 Contamination InspectionsContamination Inspection

Detect defects on container sidewalls including dirt, burns, discoloration, and embedded particulate matter caused by carbon buildup during the molding process.
 Surface Finish Defect InspectionSurface Finish Defect Inspection

Inspects the container for swirls, scratches, or other blemishes in the color and finish of the container.
 Blister and Bubble InspectionBlisters and Bubble Inspections

Verifies the sidewalls and bottom of the container are free from blisters and bubbles.
 




Foreign Debris Inspections


Foreign Debris Inspection


 

Foreign Debris Inspections

Inspects for foreign material that has fallen into the container during the manufacturing or shipping process.


Left: swarf inside container.







 

Left: plastic chip in spice jar.

 Gate InspectionGate Inspections

Inspect for pulled, blown out, burnt, mushroomed, or improperly positioned gate.
 Preform Gate InspectionPreform Gate Inspections

Verify the gate of a preform has been properly formed.