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Summerschool2011 - plastic shaping part II
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Summerschool2011 - plastic shaping part II

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  • 1. CLEM CLEM VACUUM FORMING dHr. Verheust V.CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 2. Overview• Vacuum forming ?• Commonly used techniques• Design: opportunities  restrictions• Finishing g• Projects j CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 3. Vacuum forming ? Thermoplastic, semimanufactured product in plate form p 3-D productCLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 4. Vacuum forming - process 3 stages in the process Heating up Forming Cooling(plate thickness, sort of material) thickness(form  place dependent) CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 5. Forming MouldHeated plate Clamp system p y Temp. control channels Vacuum channelCLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 6. Forming machines 2 basic concepts• Single-station (discontinuous)• Multi-station (q (quasi-continuous) ) CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 7. Forming machines Single-station Multi-station (carrousel) 1 treatment station 3 different treatment stations (loading/unloading, heating, forming)CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 8. Commonly used techniques• Positive forming – Usual positive forming – Forming using pre-blowing – Forming a vacuum• Negative forming – Usual negative forming – Forming with stamp – Forming using pre-blowing, stamp and vacuum• Hi h pressure f High forming (HPF) i• Twin sheet forming g CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 9. Usual positive forming Heating Elastic Forming iCLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 10. Usual positive forming improvement via• V i bl wall thickness  Variable ll hi k pre-blowing or vacuum• Inside – correct dimensions CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 11. ApplicationCLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 12. Positive forming + pre-blowing• Better division of wall thickness via pre- blowing1. Pre-blowing 2. Vacuum CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 13. Positive forming + pre-blowingCLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 14. ApplicationsCLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 15. ApplicationCLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 16. Positive forming + vacuum• Better division of wall thickness via vacuum Vacuum CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 17. Application Lighting hood (base: 500 x 350) (height: (h i ht 600)CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 18. Negative forming Variable wall thicknessVacuum CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 19. Negative forming Improvement via• Variable wall thickness  stamp• Outside – correct dimensions CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 20. ApplicationCLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 21. Negative with stamp• Better division of wall thickness via stamp 1. Stamp stretching 2. V 2 Vacuum CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 22. ApplicationsCLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 23. Negative forming with pre pre- blowing, stamp and vacuum• Better division of wall thickness 1. Pre-blowing 2. St 2 Stamp stretching 3. Vacuum CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 24. ApplicationsCLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 25. High pressure forming (HPF) At atmosphere High pressure Acute A t angles? l ? •Almost always negative •Acute angles  no problem •Adding texture to the surface is possibleCLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 26. Negative HPF• Variable wall thickness• Adding texture to the surface is possible CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 27. Negative HPF with stamp• Better division of wall thickness via stamp• Adding texture to the surface is possible CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 28. Twin sheet forming• 2 sheets are heated up simultaneously + formed + welded CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 29. Design: opportunities  restrictions• Variable wall thickness Positive Negative• 1 side with correct dimensions as a result ofcontact with mould CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 30. Design: opportunities  restrictions• Ideal angle g 135 °, ideal 90°, good 60°, to be avoided to be avoided better best CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 31. Design: opportunities  restrictions• Conics• A id undercuts, though they are possible Avoid d t th h th ibl CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 32. Design: opportunities  restrictions• Depth of draw p Stamp necessary ? •S Secondary d d draw Strong thinning of wall thickness  Stamp from above with controlled ih ll d temperature CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 33. Design: opportunities  restrictions• Draw ratio sum of all surfaces initial thicknessDraw ratio = = initial surface average final thickness CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 34. Finishing From plate to final product Vacuum forming with automatic loaderCLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 35. Finishing From plate to final product 5-axis milling 3D measurement benchCLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 36. Projects• Realised projects in very diverse domains – Medical sector – Automotive sector / transport – Industry – Design & display – Art – ... CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 37. Projects• Medical sector Part of radiology device Communication aid CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 38. Projects• Automotive sector / transport Bodywork Roof part CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 39. Projects• Industry Housing of a loom Internal door CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 40. Projects• Design & display CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk
  • 41. Projects• Art Pieces of scenery CLEM N.V. Spinnerijkaai 39, B-8500 Kortrijk