Mould pressure control in rotational moulding

Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture

Volumn 218, Issue 12, 2004, Pages 1683-1693

  Crawford, R J ^a   Spence, A G ^b   Cramez, M C ^c   Oliveira, M J ^c  

^a QUEEN'S UNIVERSITY BELFAST   (United Kingdom)

^b Centro Inc   (United States)

^c UNIVERSITY OF MINHO   (Portugal)

Author keywords

Mould pressure control; Notational moulding; Plastics

Indexed keywords

DENSIFICATION; MATHEMATICAL MODELS; PARTICLE SIZE ANALYSIS; PLASTICS; POROSITY; REDUCTION; SURFACE TENSION; VELOCITY MEASUREMENT; VISCOSITY;

MELTED PLASTICS; MOULD PRESSURE CONTROL; POWDER PARTICLES; ROTATIONAL MOULDING;

PRESSURE CONTROL;

EID: 11144238724     PISSN: 09544054     EISSN: None     Source Type: Journal    
DOI: 10.1177/095440540421801204     Document Type: Conference Paper

References (47)

1. Beall, G. L. Rotational Molding - Design, Materials, Tooling and Processing, 1998, p. 245 (Hanser, Munich, Germany).
2. Crawford, R. J. and Throne, J. L. Rotational Molding Technology, 2002 (William Andrew Publishing, New York).
3. Crawford, R. J. (Ed.) Rotational Moulding of Plastics, Polymer Engineering, 2nd edition, 1996, p. 260 (Research Studies Press, London).
4. Ramazzotti, D. Rotational molding. In Plastic Product Design Handbook (Ed. E. Miller), 1983, pp. 75-104 (Marcel Dekker, New York).
5. Mooney, P. J. New Market Dynamics in Rotomolding, 2003, 162 pp. (Plastics Custom Research Services, Advance, North Carolina).
6. Mooney, P. J. The Recent Pace and Pattern of Growth in North American Rotational Moulding, 1997 (Plastics Custom Research Services, New Canaan, Connecticut).
7. Mooney, P. J. An Analysis of the North American Rotational Molding Business, 1995 (Plastics Custom Research Services, New Canaan, Connecticut).
8. Mooney, P. The New Economics of Rotational Molding, 1999 (Plastics Custom Research Services, New Canaan, Connecticut).
9. Anon. Rotational molding industry in Western Europe. Rotation, 1993, 2(2), 47-49.
10. Anon. AMI's Guide to the Rotational Moulding Industry in Western Europe, 2nd edition, 1995 (Applied Market Information, Bristol).
11. Anon. Rotational Moulding Industry in Western Europe, 2nd edition, 1995 (Applied Market Research, Bristol).
12. Spence, A. G. Analysis of bubble formation and removal in rotationally moulded products. PhD thesis in Mechanical and Manufacturing Engineering, The Queen's University of Belfast, Belfast, 1994, 340 pp.
13. Rao, M. A. and Throne, J. L. Principles of rotational molding. Polym. Engng Sci., July 1972, 12, 237-264.
14. Scott, J. A. A study of the effects of process variables on the properties of rotationally moulded plastic articles. PhD thesis in Mechanical and Manufacturing Engineering, The Queen's University of Belfast, Belfast, 1986.
15. Gogos, G. Bubble removal in rotational molding. In Society of Plastics Engineers Regional Technical Conference (SPE RETEC), Cleveland, Ohio, USA, 1999.
16. Progelhof, R. C., Cellier, G. and Throne, J. L. New technology of rotational molding. In Society of Plastics Engineers Annual Technical Conference (SPE ANTEC), 1982.
17. Nugent, P. J. Theoretical and experimental studies of heat transfer during rotational moulding. PhD thesis in Mechanical and Manufacturing Engineering, The Queen's University of Belfast, Belfast, 1990.
18. Kontopoulou, M. and Vlachopoulos, J. Bubble dissolution in molten polymers and its role in rotational molding. Polymer Engng Sci., 1999, 39(7), 1189-1198.
19. Kontopoulou, M., Takacs, E. and Vlachopoulos, J. Particle coalescence and densification in rotational molding. In Society of Plastics Engineers Regional Technical Conference (SPE RETEC), Cleveland, Ohio, 1999.
20. Spence, A. G. and Crawford, R. J. Pin-holes and bubbles in rotationally moulded products. In Rotational Moulding of Plastics (Ed. R. J. Crawford), 2nd edition, 1996, pp. 217-241 (John Wiley, New York).
21. Crawford, R. J. and Scott, J. A. The formation and removal of gas bubbles in a rotational moulding grade of PE. Plast. Rubb. Processing Applic., 1987, 7(2), 85-99.
22. Kontopoulou, M. A study of the parameters involved in the rotational molding of plastics. PhD thesis in Chemical Engineering, McMaster University, Hamilton, Canada, 1995, p. 139.
23. Kontopoulou, M., Takacs, E. and Vlachopoulos, J. An investigation of the bubble formation mechanism in rotational molding. Rotation, 2000, 9(1), 28-33.
24. Kelly, P. Y. Microscopic Examination of Rotomolded Polyethylene, 1981 (Du Pont, Toronto, Canada).
25. Epstein, P. S. and Plesset, M. S. On the stability of gas bubbles in liquid-gas solutions. J. Chem. Physics, 1950, 18, 1505-1509.
26. Throne, J. L. So...where does the air go? 1998; http://www.foamandform. com.
27. Spence, A. G. and Crawford, R. J. An investigation of the occurrence of gas bubbles in rotationally moulded products. Rotation, 1995, 4(2), 9-14.
28. Spence, A. G. and Crawford, R. J. Simulated bubble removal under pressurised rotational moulding conditions. Rotation, 1995, 4(3), 17-23.
29. Spence, A. G. and Crawford, R. J. The effect of processing variables on the formation and removal of bubbles in rotationally molded products. Polym. Engng Sci., 1996, 36(7), 993-1009.
30. Spence, A. G. and Crawford, R. J. Removal of pin-holes and bubbles from rotationally moulded products. Proc. Instn Mech. Engrs, Part B: J. Engineering Manufacture, 1996, 210(B6), 521-533.
31. Spence, A. G. and Crawford, R. J. Pin-holes and bubbles in rotationally moulded products. In Rotational Moulding (Ed. R. J. Crawford), 1996, pp. 217-242 (Research Studies Press, London).
32. Xu, L. and Crawford, R. J. Analysis of bubble size in rotationally moulded products. Mater. Engrs, 1996, 16, 27-40.
33. Xu, L., Spence, A. G. and Crawford, R. J. Simulated bubble removal under normal moulding conditions. Rotation, 1995, 4(3), 9-14.
34. Xu, L. and Crawford, R. J. Analysis of the formation and removal of gas bubbles in rotationally moulded thermoplastics. J. Mater. Sci., 1993, 28, 2067-2074.
35. Bellehumeur, C. T., Bisaria, M. K. and Vlachopoulos, J. An experimental study and model assessment of polymer sintering. Polym. Engng Sci., 1996, 36(17), 2198-2206.
36. Kontopoulou, M., Bellehumeur, C. T. and Valachopoulos, J. A comparative study of the rotomolding characteristics of various polymers. In Society of Plastics Engineers Annual Technical Conference (SPE ANTEC), Toronto, Canada, 1997.
37. Walls, K. Dimensional control in rotationally moulded plastics. PhD thesis in Mechanical and Manufacturing Engineering, The Queen's University of Belfast, Belfast, 1998.
38. O'Neill, S. Cooling of rotationally moulded plastics. PhD thesis in Mechanical Engineering, The Queen's University of Belfast, Belfast, 1999.
39. Crawford, R. J. The importance of venting in rotational moulding. Rotation, 1999, 8(5), 20-22.
40. MacKinnon, C. Venting in rotational moulding - another perspective. Rotation, 2000, 9(1), 40-44.
41. Nugent, P. Venting of molds for rotational molding. In Proceedings of the 20th Annual Spring Association of Rotational Molders (ARM) Meeting, Orlando, Florida, 1996.
42. Cramez, M. C., Oliveira, M. J. and Crawford, R. J. Relationship between the microstructure and properties of rotationally moulded plastics. In Society of Plastics Engineers Annual Technical Conference (SPE ANTEC), 1998.
43. Cramez, M. C., Oliveira, M. J. and Crawford, R. J. Prediction of degradation of polyethylene during rotational moulding. In Society of Plastics Engineers Annual Technical Conference (SPE ANTEC), New York, 1999.
44. Cramez, M. C., Oliveira, M. J. and Crawford, R. J. Effect of internal pressure on the microstructure and properties of rotationally moulded polyethylene. In Proceedings of the ESAFORM Conference, Guimaraes, Portugal, 1999.
45. Cramez, M. C., Oliveira, M. J. and Crawford, R. J. Optimisation of rotational moulding of polyethylene by predicting antioxidant consumption. Polym. Degradation Stability, 2002, 75, 321-327.
46. Oliveira, J., Cramez, M. C. and Crawford, R. J. Prediction of degradation of polyethylene during rotational molding. In Society of Plastics Engineers Annual Technical Conference (SPE ANTEC), Orlando, Florida, 2000.
47. Crawford, R. J. Active venting in rotational moulding. Rotation, 2002, 11(3), 32-36.