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Dive into the research topics where Leszek Różański is active.

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Featured researches published by Leszek Różański.


Archives of Mechanical Technology and Materials | 2016

The use of IR thermography to show the mold and part temperature evolution in injection molding

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

Investigations Regarding the Influence of Surface Topography on Emissive Properties of Material

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

The Design Concept of the Laboratory Heater for Studying the Effect of Surface Topography to Emissivity

Radomir Majchrowski; Karol Grochalski; Leszek Różański


Przetwórstwo Tworzyw | 2014

Badania procesu wtryskiwania z wykorzystaniem termografii w podczerwieni

Karol Bula; Leszek Różański; Maciej Buczkowski


Inżynieria Maszyn | 2013

Wykorzystanie metod aktywnej termografii w podczerwieni do wykrywania defektów materiałowych

Leszek Różański; Krzysztof Ziopaja


XXVII Seminarium "Współczesne metody budowy, wzmacniania i przebudowy mostów", 13-14.06.2017, Rosnówko k. Poznania, Polska | 2017

Możliwości zastosowania termografii w podczerwieni do diagnostyki obiektów mostowych

Krzysztof Ziopaja; Leszek Różański


Archive | 2017

Damage detection in a concrete slab using IR thermography and wavelet transform

Krzysztof Ziopaja; Leszek Różański


Measurement Automation Monitoring | 2017

Detection of material defects in reinforced concrete slab using active thermography

Leszek Różański; Krzysztof Ziopaja


Quantitative InfraRed Thermography | 2016

Applicability analysis of active IR thermography and selected signal processing methods for technical conditions assessment of bridge elements

Leszek Różański; Krzysztof Ziopaja


Archive | 2015

The Surface 3D Parameters to Describe the Diffuse Reflective and Emissive Properties of Selected Dielectrics

Radomir Majchrowski; Leszek Różański; Karol Grochalski

Collaboration


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Karol Bula

Poznań University of Technology

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Karol Grochalski

Poznań University of Technology

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Radomir Majchrowski

Poznań University of Technology

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Bartosz Gapinski

Poznań University of Technology

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Dawid Wróbel

Poznań University of Technology

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Lidia Marciniak-Podsadna

Poznań University of Technology

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M. Grzegorz Krolczyk

Opole University of Technology

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Michał Wieczorowski

Poznań University of Technology

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