This website uses cookies primarily for visitor analytics. Certain pages will ask you to fill in contact details to receive additional information. On these pages you have the option of having the site log your details for future visits. Indicating you want the site to remember your details will place a cookie on your device. To view our full cookie policy, please click here. You can also view it at any time by going to our Contact Us page.

Success in infrared temperature measurement in thermoforming with the Calex PyroMini

13 January 2015

The process of thermoforming a plastic sheet depends critically upon temperature. Calex pyrometers have been used by leading manufacturers to control heating and cooling in thermoforming for more than 10 years, resulting in increased product quality, consistency and production rates, and a reduction in heating costs.

Forming temperatures typically range from 120°C to 370°C. Precise temperature control is required, and the high-performance PyroMini infrared temperature sensor is ideal.

The plastic sheet is heated by infrared heaters; a temperature sensor is used for each heating zone to ensure it is heated evenly. For the best control, at least 10 points should be measured: all four corners and the centre, on the top and bottom surfaces.

The sensing head is positioned between the heating elements. High ambient temperatures mean that PyroMini JA (up to 120°C ambient) and HA (up to 180°C ambient) models are most suitable. No cooling is required for the sensing head.

The production rate is often limited by the cooling time. The PyroMini monitors the surface temperature of the formed part as it is cooled with an instantaneous 240 ms response time, so the operator or control system can see immediately when the part is cool enough and remove it quickly.

The optional touch screen display provides a large, bright indication of measured temperature, 2 alarm relay outputs, and data logging to a MicroSD Card. The sensor is fully configurable via the touch screen.

For connection to a PLC or temperature controller, two output types are available: 4 to 20 mA or RS485 Modbus.

Calex can also provide other thermoforming temperature systems ranging from a single sensor with a PID controller, to a digital network of hundreds of sensors, with display, control, alarm, analogue output and data acquisition functions.

For more information, see our application note: http://calex.co.uk/downloads/application_guidance/thermoforming_temperature_measurement.pdf

The PyroMini is available to order now. For more information please contact Calex by email at mail@calex.co.uk or call +44 1525 373178.


Contact Details and Archive...

Print this page | E-mail this page