Instrumentation

V- TECH Polariscope is used to view the internal material stresses and material flow characteristics of PET preforms and containers. This is ideal for laboratory use and at-the-line preform and bottle inspection Defects in preform can be easily detected by using this equipment. When a preform is held parallel to viewing field colourpattern is seen known as is ochromatic fringe. This indicates magnitude of the stresses introduced during moulding process. When a perform is held 45 deg to viewing field a coloured pattern known as is oclinic is seen, this indicates direction of stresses.Polariscope is used in the preform assembly to check the possible defect in the preforms. Take the precautions at the early stage would help a lot in cost cutting and time-saving. A defect chart is provided to understand these defects.The device gives you 2 slots for different light orientation; one is for 90° and other is for 45°