Mold for Manipulation Microstructure Development
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C. A. Silva
Abstract
The control of microstructure development in injection molding had attracted several important studies in the recent years, being well established that the thermo-mechanical environment imposed to the polymer melt depends on the material properties, molding geometry and processing conditions.
An entirely new design of an injection mold RCEM (Rotation, Compression and Expansion Mold) was developed and implemented, allowing for a wide variation of the filling and packing conditions in a flat disk geometry. One of the cavity walls (the ejection side) can rotate or move with a linear movement during the injection and holding stages. This enables several filling sequences and the variation of the cavity thickness. Two electric servomotors are use to directly drive those movements. Two temperatures and pressure sensors allow for the on-line process monitoring.
Several examples of the potential uses of the RCEM are shown for the cases of amorphous and semicrystalline polymers. Results obtained with short-fiber reinforced polypropylene are also presented.
References
1 Cunha, A. M, Godinho, J. S., Viana, J. C., in: Processing, Microstructure, Properties Relationships in Injection Molding Products, NATO-ASI Series, Cunha, A. M., FakirovS. (Eds.), Kluver Academics (2000).Suche in Google Scholar
2 Viana, J. C., Cunha, A. M., Billon, N.: J. Mat. Sci.36, p. 4411 (2001).10.1023/A:1017970416968Suche in Google Scholar
3 Viana, J. C., Cunha, A. M, Billon., N.: Polymer, 43, p. 4185 (2002).10.1016/S0032-3861(02)00253-7Suche in Google Scholar
4 Viana, J. C.: Polymer45, p. 993 (2004).10.1016/j.polymer.2003.12.001Suche in Google Scholar
5 UK Patent GB 2170-142-B (1987), Allan, P. S., Bevis, M. J..Suche in Google Scholar
6 Allan, P. S., Bevis, M. J.: Plast. Rubb. Proc. Appl.7, p. 3 (1987).Suche in Google Scholar
7 Gutjahr, L. M., Becker, H.: Kunststoffe, 79, p. 874 (1989).Suche in Google Scholar
8 Kalay, G., Allan, P. S., Bevis, M. J.: Kunststoffe87, 6, p. 768 (1997).Suche in Google Scholar
9 Ogbonna, C. I., Kalay, G., Allan, P. S., Bevis, M. J.: J. Appl. Polym. Sci.58, p. 2131 (1995).10.1002/app.1995.070581126Suche in Google Scholar
10 Allan, P. S., Bevis, M. J.: Compos. Manufact.1, p. 79 (1990).10.1016/0956-7143(90)90240-WSuche in Google Scholar
11 Pinwill, I. E., Ahmad, F., Allan, P. S., Bevis, M. J.: Powder Metallurgy35, p. 2 (1992).10.1179/pom.1992.35.2.107Suche in Google Scholar
12 Allan, P. S., Bevis, M. J.: Paper presented at Int. Conf. on New Materials and their Applications, University of Warwick, England (1990).Suche in Google Scholar
13 Silva, C. A., Viana, J. C., Cunha, A. M.: Paper presented at Polymer Processing Society Annual Meeting, Guimarães, Portugal (2002).Suche in Google Scholar
14 Silva, C. A., Viana, J. C., Dias, G. R., Cunha, A. M.: Paper presented at Polymer Processing Society Regional Meeting, Taiwan (2002).Suche in Google Scholar
15 Silva, C. A., Viana, J. C., Dias, G. R., Cunha, A. M.: Paper presented at Antec, Nashville, USA (2003).Suche in Google Scholar
16 Silva, C. A., Viana, J. C., Cunha, A. M.: Paper presented at Polymer Processing Society Annual Meeting, Melbourne, Australia (2003).Suche in Google Scholar
17 Silva, C. A., Viana, J. C., Cunha, A. M.: Paper presented at 12th International Conference on Deformation, Yield and Fracture of Polymers, Cambridge, UK (2003).Suche in Google Scholar
18 Silva, C. A., Viana, J. C., Cunha, A. M.: Paper presented at Polychar 12, Guimarães, Portugal (2004).Suche in Google Scholar
19 Silva, C. A., Viana, J. C., Cunha, A. M.: Paper presented at Polymer Crystallization and Structure Formation in Processing, Linz, Austria (2003).Suche in Google Scholar
20 Silva, C. A., Viana, J. C., Cunha, A. M.: Paper presented at Sampe – JISSE8, Japan (2003).Suche in Google Scholar
21 Silva, C. A., Viana, J. C., Cunha, A. M.: Paper presented at ANTEC, Chicago, USA (2004).Suche in Google Scholar
22 Bay, R. S., TuckerIII, C. L.: Polym. Eng. Sci.32, 4, p. 240 (1992).10.1002/pen.760320404Suche in Google Scholar
© 2005, Carl Hanser Verlag, Munich
Artikel in diesem Heft
- Contents
- Contents
- Editorial
- New at International Polymer Processing
- Regular Contributed Articles
- Preparing of Homogeneous Solution of Ultrahigh Molecular Weight PAN
- Non-linear Viscoelastic Behavior of PVC Plastisol
- Algorithms for Two Gate Optimization in Injection Molding
- Viscoelastic Properties of Flexible Organic Fiber Composites
- Mold for Manipulation Microstructure Development
- Simultaneous Biaxial Stretching of PP Resins of Varying Tacticity
- Rotational Moulding of PVC Plastisol
- Drawability of As-spun PP Fibres
- Melt Fracture of Linear PE
- Investigation of the Cooling Jets Used in the Blown Film Process
- Non-linear Crystalline Spherulitic Growth Behavior for LLDPE
- Design Sensitivity Analysis for the Optimization of the Injection Molding Process
- Preparation and Characteristics of Reactive Blends of Phosphate-containing Maleimide and Epoxy
- Easy Tear Multilayer Film of Biaxially Oriented PA6/MXD6 by Double Bubble Tubular Film Process
- PPS News
- PPS News
- Seikei-Kakou Abstracts
- Seikei-Kakou Abstracts
Artikel in diesem Heft
- Contents
- Contents
- Editorial
- New at International Polymer Processing
- Regular Contributed Articles
- Preparing of Homogeneous Solution of Ultrahigh Molecular Weight PAN
- Non-linear Viscoelastic Behavior of PVC Plastisol
- Algorithms for Two Gate Optimization in Injection Molding
- Viscoelastic Properties of Flexible Organic Fiber Composites
- Mold for Manipulation Microstructure Development
- Simultaneous Biaxial Stretching of PP Resins of Varying Tacticity
- Rotational Moulding of PVC Plastisol
- Drawability of As-spun PP Fibres
- Melt Fracture of Linear PE
- Investigation of the Cooling Jets Used in the Blown Film Process
- Non-linear Crystalline Spherulitic Growth Behavior for LLDPE
- Design Sensitivity Analysis for the Optimization of the Injection Molding Process
- Preparation and Characteristics of Reactive Blends of Phosphate-containing Maleimide and Epoxy
- Easy Tear Multilayer Film of Biaxially Oriented PA6/MXD6 by Double Bubble Tubular Film Process
- PPS News
- PPS News
- Seikei-Kakou Abstracts
- Seikei-Kakou Abstracts
