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Rotational Moulding - Future Technology, is it here now?

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Ian Hansen
Ian Hansen

The document discusses three rotomoulding technologies - internal temperature measurement, internal pressure monitoring and control, and internal cooling systems - that were highlighted by Professor Roy Crawford in 2004 as being important for the future of rotomoulding. It provides details on the state of each technology at that time, including that internal temperature measurement was possible using thermocouples for rock and roll machines and proprietary systems for biaxial ovens, internal pressure monitoring was available using proprietary systems, and internal cooling could be done using air or low-speed water misting on some machines.

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ianhansenconsult@gmail.com www.ianhansenconsult.com Internal Temperature Internal Pressure Internal Cooling
In 2004 Professor Roy Crawford spoke to the rotomoulding industry about The Future of Rotational Moulding
Internal Temperature 1 Measure the temperature inside the mould. 1 2 3 Rotomoulding Technologies highlighted in 2004 Internal Pressure 2 Control the air pressure inside the mould. Internal Cooling 3 Control the air temperature inside the mould.
Source : Prof. Roy Crawford, Future of Rotomoulding, ARMA 2004 Annual Conference 1.Internal Temperature 2.Internal Pressure 3.Internal Cooling Awareness of technology Use of technology Would use if available
Internal Air Temperature (IAT) 1 IAT is necessary to be able to control the rotomoulding process. 1 2 3 Measure the Internal Temperature 0 50 100 150 200 250 300 0 5 10 15 20 25 30 35 40 TemperatureC
1 2 3 Internal Temperature measurement possible in 2004 Rotolog Open Flame IAT is cheap and simple for Rock & Roll, using thermocouples and hand held thermometer IAT is possible for biaxial ovens using proprietary systems like Rotolog or K-Paq
1 2 3 Measure the Internal Pressure Control Pressure If vent becomes blocked internal pressure will increase. Zero pressure makes it harder to eliminate air bubbles. Variable pressure will obtain faster cycle and better quality. 2 Source : Prof. Roy Crawford, Controlling Pressure Inside the Mould, ARMA 2013 Annual Conference Pressure
1 2 3 Internal Pressure monitoring possible Internal Pressure monitoring is possible for any mould or machine combination using a proprietary system like K-Paq, from 493K New machine technology is now available from Persico in the form of SMART Leonardo to monitor and control pressure.
Internal Pressure ¡®control¡¯ possible Low cost ¡®automatic¡¯ vents are now commercially available, in the form of Supavents or Smartvents. These are silicone tubes that have slits which are closed during heating stage and opened during cooling stage. Bubbles and pinholes can be reduced and impact strength increased, when compared to an standard ¡®open¡¯ vent 1 2 3
1 2 3 Internal Cooling ¨C Faster cycles Control Internal Temperature 3 Internal Air Cooling - Use air to blow inside the mould to exhaust the hot air, but slow because of low heat transfer. Internal Water Cooling - Use fine water mist inside to remove heat at high speed by vaporizing into steam. Rotocooler
1 2 3 Internal Cooling ¨C Faster cycles, less warpage Control Internal Cooling 3 Rock & Roll technology ¨C Cheap and simple for Rock & Roll machines to deliver Air or Water mist inside moulds. Biaxial technology ¨C Low speed internal air cooling possible on most modern machines using venture or transvectors. High speed internal water cooling possible using proprietary systems like Supacool or Rotocooler .
Moulders must recognise the value of technology, rather than the price of it.1 Moulders must not accept the status quo, and need to recognise that changes cost money.2 The Future of Rotomoulding is here now! Source 1+2: Prof. Roy Crawford, Future of Rotomoulding, ARMA 2004 Annual Conference
Moulders need to have full control over all process variables to provide consistent part quality and significantly reduce cycle times ¡°You cannot improve what you cannot control¡±3 3 Source : Prof. Roy Crawford ianhansenconsult@gmail.com www.ianhansenconsult.com
You can do it We can help! Contact : Ian Hansen at RotoConsult Email : ianhansenconsult@gmail.com

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Rotational Moulding - Future Technology, is it here now?

  • 2. In 2004 Professor Roy Crawford spoke to the rotomoulding industry about The Future of Rotational Moulding
  • 3. Internal Temperature 1 Measure the temperature inside the mould. 1 2 3 Rotomoulding Technologies highlighted in 2004 Internal Pressure 2 Control the air pressure inside the mould. Internal Cooling 3 Control the air temperature inside the mould.
  • 4. Source : Prof. Roy Crawford, Future of Rotomoulding, ARMA 2004 Annual Conference 1.Internal Temperature 2.Internal Pressure 3.Internal Cooling Awareness of technology Use of technology Would use if available
  • 5. Internal Air Temperature (IAT) 1 IAT is necessary to be able to control the rotomoulding process. 1 2 3 Measure the Internal Temperature 0 50 100 150 200 250 300 0 5 10 15 20 25 30 35 40 TemperatureC
  • 6. 1 2 3 Internal Temperature measurement possible in 2004 Rotolog Open Flame IAT is cheap and simple for Rock & Roll, using thermocouples and hand held thermometer IAT is possible for biaxial ovens using proprietary systems like Rotolog or K-Paq
  • 7. 1 2 3 Measure the Internal Pressure Control Pressure If vent becomes blocked internal pressure will increase. Zero pressure makes it harder to eliminate air bubbles. Variable pressure will obtain faster cycle and better quality. 2 Source : Prof. Roy Crawford, Controlling Pressure Inside the Mould, ARMA 2013 Annual Conference Pressure
  • 8. 1 2 3 Internal Pressure monitoring possible Internal Pressure monitoring is possible for any mould or machine combination using a proprietary system like K-Paq, from 493K New machine technology is now available from Persico in the form of SMART Leonardo to monitor and control pressure.
  • 9. Internal Pressure ¡®control¡¯ possible Low cost ¡®automatic¡¯ vents are now commercially available, in the form of Supavents or Smartvents. These are silicone tubes that have slits which are closed during heating stage and opened during cooling stage. Bubbles and pinholes can be reduced and impact strength increased, when compared to an standard ¡®open¡¯ vent 1 2 3
  • 10. 1 2 3 Internal Cooling ¨C Faster cycles Control Internal Temperature 3 Internal Air Cooling - Use air to blow inside the mould to exhaust the hot air, but slow because of low heat transfer. Internal Water Cooling - Use fine water mist inside to remove heat at high speed by vaporizing into steam. Rotocooler
  • 11. 1 2 3 Internal Cooling ¨C Faster cycles, less warpage Control Internal Cooling 3 Rock & Roll technology ¨C Cheap and simple for Rock & Roll machines to deliver Air or Water mist inside moulds. Biaxial technology ¨C Low speed internal air cooling possible on most modern machines using venture or transvectors. High speed internal water cooling possible using proprietary systems like Supacool or Rotocooler .
  • 12. Moulders must recognise the value of technology, rather than the price of it.1 Moulders must not accept the status quo, and need to recognise that changes cost money.2 The Future of Rotomoulding is here now! Source 1+2: Prof. Roy Crawford, Future of Rotomoulding, ARMA 2004 Annual Conference
  • 13. Moulders need to have full control over all process variables to provide consistent part quality and significantly reduce cycle times ¡°You cannot improve what you cannot control¡±3 3 Source : Prof. Roy Crawford ianhansenconsult@gmail.com www.ianhansenconsult.com
  • 14. You can do it We can help! Contact : Ian Hansen at RotoConsult Email : ianhansenconsult@gmail.com