Leszek Różański
Poznań University of Technology
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Featured researches published by Leszek Różański.
Archives of Mechanical Technology and Materials | 2016
Karol Bula; Leszek Różański; Lidia Marciniak-Podsadna; Dawid Wróbel
Abstract This study concerns the application of infrared camera for injection molding analysis by measuring temperatures of both injection molded parts and injection mold cavities in a function of injection cycles. The mold with two cavities, differing in thickness (1 and 3 mm), and a cold direct runner was used. Isotactic polypropylene homopolymer was utilized to produce parts. Mold temperature was set at 22°C and controlled by a water chiller. Five measuring points were determined: SP1, SP2 (placed in the 3 mm cavity), SP3, SP4 (located in the 1 mm cavity) and SP5 around an injection molding gate. Our investigations showed that the highest temperature is localized around SP2 point and the lowest at SP4. Also, it was proved that even after 62 injection molding cycles, temperatures of cavities were not stable, revealing their further increase with each cycle.
Applied Mechanics and Materials | 2014
Michał Wieczorowski; Leszek Różański; Bartosz Gapinski; M. Grzegorz Krolczyk
In the paper analysis of surface topography influence on emissivity of metals was shown. This was performed for infrared band comprising wavelength region of 7.5 13 micrometers. Appropriate characterization and description of object emissivity has a crucial influence on accuracy of IR system for remote temperature measurement, e.g. IR thermography or pyrometry. These properties depend on many factors, including surface topography of material, where especially cavities play a very important role. In references so far emissivity are discussed mainly as influence of type of material (metal, dielectric), its temperature, wavelength or direction of emission. In the paper characterizing emissivity of construction materials in connection with 3D surface topography.
Measurement Automation Monitoring | 2015
Radomir Majchrowski; Karol Grochalski; Leszek Różański
Przetwórstwo Tworzyw | 2014
Karol Bula; Leszek Różański; Maciej Buczkowski
Inżynieria Maszyn | 2013
Leszek Różański; Krzysztof Ziopaja
XXVII Seminarium "Współczesne metody budowy, wzmacniania i przebudowy mostów", 13-14.06.2017, Rosnówko k. Poznania, Polska | 2017
Krzysztof Ziopaja; Leszek Różański
Archive | 2017
Krzysztof Ziopaja; Leszek Różański
Measurement Automation Monitoring | 2017
Leszek Różański; Krzysztof Ziopaja
Quantitative InfraRed Thermography | 2016
Leszek Różański; Krzysztof Ziopaja
Archive | 2015
Radomir Majchrowski; Leszek Różański; Karol Grochalski