Identification of Surface Quality of Plastic Electrodes after Blasting B. Haluzíková 1,2,a , J. Valíček 1,2,b , P. Škubala 3,c , M. Harničárová 4,d , D. Bražina 5,e , V. Szarková 2,6,f , P. Koštial 7,g , M. Kušnerová 1,2,h , K. Rokosz 8,i , R. Tomkowski 9,j and W. Kapłonek 9,k 1 Institute of Physics, Faculty of Mining and Geology, VŠB - Technical University of Ostrava, 17. listopadu 15/2172, 708 33 Ostrava-Poruba, Czech Republic 2 RMTVC, Faculty of Metallurgy and Materials Engineering, VŠB - Technical University of Ostrava, 17. listopadu 15/2172, 708 33 Ostrava - Poruba, Czech Republic 3 EBG plastics CZ s.r.o., Slovenská 1B/1143, 702 00 Ostrava – Přívoz, Czech Republic 4 Nanotechnology Centre, VŠB - Technical University of Ostrava, 17. listopadu 15/2172, 708 33 Ostrava-Poruba, Czech Republic 5 Faculty of Science, Department of Informatics and Computers, University of Ostrava, 30. dubna 22, 701 03 Ostrava, Czech Republic 6 Institute of Economics and Control Systems, Faculty of Mining and Geology, VŠB - Technical University of Ostrava, 17. listopadu 15/2172, 708 33 Ostrava-Poruba, Czech Republic 7 Department of Material Engineering, Faculty of Metallurgy and Materials Engineering, VŠB - Technical University of Ostrava, 17. listopadu 15/2172, 70833 Ostrava-Poruba, Czech Republic 8 Department of Surface Electrochemistry, Faculty of Mechanical Engineering, Koszalin University of Technology, RACŁAWICKA 15-17, PL 75-620 Koszalin, Poland 9 Department of Production Engineering, Faculty of Mechanical Engineering, Koszalin University of Technology, Raclawicka 15-17, 75-620 Koszalin, Poland a barbora.haluzikova@vsb.cz, b jan.valicek@vsb.cz, c pskubala@ebg-plastics.cz, d marta.harnicarova@vsb.cz, e david.brazina@osu.cz, f veronika.szarkova@vsb.cz, g pavel.kostial@vsb.cz, h milena.kusnerova@vsb.cz, i rokosz@tu.koszalin.pl, j robert.tomkowski@tu.koszalin.pl, k wojciech.kaplonek@tu.koszalin.pl Keywords: plastic parts after blasting, surface topography Abstract. Nowadays, plastics have become one of the most demanded materials, replacing the traditional ones such as metals. Therefore, many companies are concerned with the production of plastics, with their distribution and innovation development. Plastics have found utility in a wide range of applications, we use them every day. Measurement of surface roughness of plastic moldings produced by the injection molding process was carried out by a contact profilometer Mitutoyo Surftest SJ401. A reason for this measurement is to obtain information about surface roughness. For further technical adjustment is required to have higher surface roughness what helps to increase electrical conductivity of plastic moldings. This involves determination of a ratio between Ra/Rz (the ratio between the arithmetic average of the roughness profile Ra and the average maximum height of the profile Rz) in order to satisfy customer demand for achieving better surface characteristics leading to an increase in electrical conductivity. Introduction Today, there is no doubt that one of the most dynamic industrial sectors is the sector of plastic processing. Plastics partially replaced the conventional materials such as wood, paper, metals, leather, glass due to their advantageous properties. The following are among the most important advantages: low weight, high strength, health harmlessness, high chemical resistance, dimensional variability, high tightness, better insulation properties, long - term durability, low price, easy maintenance, and aesthetic appearance [1]. Many companies are trying to solve the problems of plastics such as their gloss, elasto-plastic properties of plastic products, different shades of colors, light transmission, dimensional instability [2], surface topography or improving product quality and that by controlling the injection process Defect and Diffusion Forum Vols. 334-335 (2013) pp 71-76 Online available since 2013/Feb/13 at www.scientific.net © (2013) Trans Tech Publications, Switzerland doi:10.4028/www.scientific.net/DDF.334-335.71 All rights reserved. No part of contents of this paper may be reproduced or transmitted in any form or by any means without the written permission of TTP, www.ttp.net. (ID: 62.108.166.160, Koszalin University of Technology, Koszalin, Poland-05/04/13,14:27:31)