THE NEW AUTOMATIC MEASUREMENT MODULE FOR UV & COLOUR FOR THE B305 PREFORM INSPECTION GAUGE, MEASURES UV TRANSMISSION AND COLOUR REFLECTANCE ON PREFORMS.

Key benefits to you

  • REDUCE LABOUR
  • IMPROVE MEASUREMENT ACCURACY
  • COST-SAVINGS ON UV BARRIER AND COLOUR ADDITIVES
  • DETECT IN-PROCESS COLOUR VARIATION
  • PROGRAMMABLE MEASUREMENT POSITIONS
  • MODULAR OPTION TO EXISTING B305 PREFORM INSPECTION GAUGE
  • COLOUR AND UV MEASUREMENT IN ONE MODULE
  • IMPROVE EFFICIENCY WITH A PART TO PART CYCLE TIME OF 10 SECONDS
  • UV MEASUREMENT ON BOTH TRANSLUCENT RPET AND CLEAR VIRGIN PREFORMS

The B305 Preform Inspection Gauge with new UV & Colour module in action

Is exposure to UV light a concern for your container? Is your colour measurement subjective?

Whilst it is necessary to dose UV and colour additive into PET resin, this process comes at a cost. Additive costs are commonly high and whilst most companies do monitor dosing, there is often over compensation taking place for confidence in container barrier performance. Torus have developed a new solution, the B305 Colour & UV Measurement module enables customers the ability to measure the amount of UV and Colour in the Preform at the production line. This means that the dosing process can be monitored closely, therefore reducing additive costs.

Colour is traditionally monitored manually, but how do you decide what is correct?

Quality control and colour acceptance becomes difficult and very subjective due to human decision making. Torus’ newly developed technology allows the gauge to monitor any drift in the process quickly identifying quality risk, saving on scrap, additives and production losses.  

The Technical Details

The UV gauging is designed to measure both translucent RPET and clear virgin PET preforms. It uses a pulsed xenon light source connected to a collimating lens via a solar resistant fibre optic cable to emit UV light through one side of the preform and collates the transmitted light at the other side by the same lens and fibre combination. This is fed back into a specially configured UV spectrometer which analyses the transmitted light. Results are given as a percentage transmission of the specific wavelength of interest, and these wavelengths are programmable to any value between 340-500nm. All measurements are accurate to +/- 1% transmittance confirmed by a UKAS calibrated neutral density filter.

The colour measurement gauging is designed for any opaque coloured preforms. It uses a combination of a pulsed xenon light and long-life halogen bulb to create a more uniform spectrum across the visible region used for accurate colour measurement. The gauge combines these light sources with a bifurcated fibre and emits directly onto the surface of the preform with a collimating lens normal to the face of the preform. The reflection from this is collected by a fibre at 45° to the emitting angle, to adhere to the traceable CIE standard geometry of 0°/45°. This reflection is collected by a fibre and fed into a spectrometer which analyses the spectral reflectance from the surface of the measured part. This is then converted into the standard colour units of CIELab and CIELch, and error values of deltaE, deltaEcmc and deltaE2000 can also be used when comparing the measurement to a colour standard. The units are selectable with Torus’ GaugeXplorer software package so that only the data needed is displayed. The gauge is calibrated with a traceable white reference standard.

The B305 Preform Inspection Gauge

The new product extension forms one of 8 optional modules offered, bringing lab capability measurements and inspections into production areas. With a part to part cycle time of 10 seconds, the B305 gauge enables cavity and tool traceability on Weight, Dimensions, Internal Diameter, Body contaminations, Gate and Seal inspections, Polarised light and now Colour and UV measurement. Part data can be read directly from the injection machine and output electronically into various process control software’s. Intelligent failure sorting routines eliminate operators searching through defects refocussing the use of manpower so that production processes can function at maximum efficiency.

More Information

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