| Issue |
MATEC Web Conf.
Volume 145, 2018
NCTAM 2017 – 13th National Congress on Theoretical and Applied Mechanics
|
|
|---|---|---|
| Article Number | 02006 | |
| Number of page(s) | 8 | |
| Section | Solid Mechanics | |
| DOI | https://doi.org/10.1051/matecconf/201814502006 | |
| Published online | 09 January 2018 | |
Evaluation by nanoindentation of technological products manufactured by pulse injection molding process
1
Institute of Mechanics of BAS, Acad. G. Bochev St., Bl. 4, 1113 Sofia, Bulgaria
2
Himicheski Produkti Ltd., 7-b, Sokol St., 8600 Yambol, Bulgaria
* Corresponding author: mnatova@yahoo.com
During conventional polymer injection molding, flow- and weld lines can arise at the molded parts caused by disturbed polymer melt flow when it crosses different parts of the equipment. Such processed plastic goods have discrete zones of inhomogeneities of very small dimensions. In order to stabilize the melt flow and to equalize dimensions of such defective products, an approach for pulse injection molding is applied during production of polymer packagings. Testing methods used for evaluation of macromechanical performance of processed polymer products are not readily applicable to estimate the changes in visual surface obtained during pulse injecting. To overcome this testing inconvenience the performance of processed packagings is evaluated by nanoindentation. Using this method, a quantitative assessment of the polymer properties is obtained from different parts of technological products.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
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