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Odlewnictwo współczesne i przyszłe w tle transformacji cywilizacyjnej ze szczególnym uwzględnieniem energii i odlewnictwa ciśnieniowego

Dudek Piotr, Sobczak Jerzy Józef

Przegląd Odlewnictwa

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2023

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Vol. 73, nr 5-6

152--165

PL

W referacie przedstawiono wyzwania branży odlewniczej, wynikające z transformacji energetycznej związanej z koniecznością ograniczenia emisji gazów cieplarnianych podczas produkcji odlewów. Scharakteryzowano przyszłościowe, potencjalne źródła energii. Zamieszczono prognozy rozwoju rynku odlewów ciśnieniowych oraz wskazano nowe trendy w produkcji odlewów dla branży samochodowej.

EN

The paper presents the challenges of the foundry industry due to the energy transition associated with the need to reduce greenhouse gas emissions during casting production. Future potential energy sources were characterized. Forecasts for the development of the die casting market were included, and new trends in the production of castings for the automotive industry were identified.

2

Aspekty okołoodlewnicze na tle aktualnej sytuacji ekonomicznopolitycznej Anno Domini 2022

Sobczak Jerzy J., Dudek Piotr, Wrzała Konrad, Walczak Wiesław

Przegląd Odlewnictwa

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2022

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Vol. 72, nr 7-8

404--413

PL

Gospodarka światowa jeszcze nie zdążyła otrząsnąć się z pandemicznych problemów, a wojna w Ukrainie już napełnia je nowymi zagrożeniami, obawami i niepewnością. Pandemia COVID19 spowodowała zagrożenia dla działalności firm, wynikające z lockdownu, co doprowadziło do przerwania łańcuchów dostaw oraz często utraty możliwości sprzedaży i świadczenia usług. I choć wirus SARS-COV-2 w dalszym ciągu ogranicza rozwój gospodarki światowej, a wysoka inflacja i wzrost cen nośników energii ogranicza zyski, to agresja Rosji na Ukrainę przyniosła nowe zagrożenia dla przedsiębiorstw.

EN

The global economy has yet to recover from pandemic problems, and the war in Ukraine is already filling them with new threats, fears and uncertainty. The COVID-19 pandemic has caused lockdown threats to companies’ operations, resulting in a disruption of supply chains and often in a loss of sales and service opportunities. While the SARS-COV-2 virus continues to constrain a growth of the global economy, with high inflation and rising energy prices reducing profits, Russia’s aggression in Ukraine has brought new risks to businesses.

3

Aktualny stan odlewnictwa na tle gospodarki światowej. Postcovidowe prognozy

Sobczak Jerzy J., Dudek Piotr

Przegląd Odlewnictwa

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2021

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Vol. 71, nr 11-12

602--615

PL

Rok 2020 został globalnie zdominowany przez pandemię zakaźnej choroby COVID-19, wywołanej przez koronawirusa SARS-CoV-2. Świat w okresie powojennym przeżył swój największy kryzys, który jeszcze nie został przezwyciężony w roku 2021. Pandemia opóźniła także zmiany strukturalne, istotne dla przyszłościowych wyzwań dla przemysłu odlewniczego. W artykule przedstawiono zmiany i tendencje w globalnej produkcji odlewów (zwłaszcza z metali nieżelaznych), w zestawieniu z danymi statystycznymi zmian istotnych wskaźników gospodarczych, takich jak PKB, PIM, poziom inflacji, a także sytuację na rynku pracy zarówno w Europie, jak i w USA.

EN

2020 has been dominated globally by the COVID-19 infectious disease pandemic caused by the SARS-CoV-2 coronavirus. The post-war world experienced its greatest crisis, which has yet to be overcome in 2021. The pandemic also delayed structural changes, essential for the future challenges for the foundry industry. The article presents changes and trends in the global production of castings (especially from non-ferrous metals) in combination with statistical data on changes in important economic indicators such as GDP, PIM, inflation level and the situation on the labor market, both in Europe and in the USA.

4

Innowacyjna linia produkcyjna do wytwarzania odlewów ciśnieniowych o znacząco obniżonej porowatości

Pacyniak Tadeusz, Dudek Piotr, Walczak Wiesław, Wrzała Konrad

Przegląd Odlewnictwa

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2020

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Vol. 70, nr 1-2

12--13

PL

W artykule przedstawiono podstawowe informacje o założeniach projektu dotyczącego opracowania i wykonania kompleksowej linii produkcyjnej odlewy ciśnieniowe o znacząco obniżonej porowatości.

EN

The basie information concerning the assumptions of the project of designing and development the complex production line of die castings of a significantly decreased porosity, are presented in the hereby paper.

5

Model gęsty od rzeźb i sztukaterii

Dudek Piotr

Geodeta : magazyn geoinformacyjny

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2020

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nr 11

28--31

6

Correction of foot deformities with hallux valgus by transversal arch restoration

Dygut Jacek, Piwowar Piotr, Detyna Jerzy, Popiela Tadeusz, Kogut Wojciech, Boron Wiktor, Dudek Piotr, Piwowar Monika

Biocybernetics and Biomedical Engineering

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2020

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Vol. 40, no. 4

1556--1567

EN

The paper presents the effects of the application of a new technical solution along with medical procedures. This approach aims to correct the collapsed transverse arch of the foot and thus restore the physiological course of the anatomical structures. In this way, the alignment of the toes is achieved, thus also eliminating valgus of the big toe. In the article are presented results for 19 patients with stage I and 22 patients with stage II of the foot deformities. Patients applied the orthosis at 57 h daily per one year. Physical examination and X-ray scans were used to assess correction progress. Angles between individual bones of the foot were compared. Correction of the transverse arch of the foot reduces the remain toes deformities of the foot (II–V). The HV angle in the group of patients with the degree I deformity before and after the therapy was 18.38 (3.18) and 15.28 (2.68), respectively, and for patients with degree II deformity it was 19.28 (2.98) and 16.3. (3.28). The correction deficit was reduced in stage I from 22% to 1.33% and in stage II from 28% to 8.6% (p < .05). The proposed approach to treating feet with the developed device, ie Forefoot arch-type orthosis: (1) restores spatial arrangement of tendons, bones, and ligaments and prevents the development of foot contractures (2) enables gradual stretching of extra-articular and capsular contractures (3) can reduce forefoot pain and improves the quality of life.

7

Multifunctional biodegradable polymer/clay nanocomposites with antibacterial properties in drug delivery systems

Rapacz-Kmita Alicja, Szaraniec Barbara, Mikołajczyk Maciej, Stodolak-Zych Ewa, Dzierzkowska Ewa, Gajek Marcin, Dudek Piotr

Acta of Bioengineering and Biomechanics

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2020

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Vol. 22, no. 2

83--92

EN

Purpose: The aim of this study was to investigate the possibility of intercalation of gentamicin and neomycin in montmorillonite (MMT) nanofillers, as well as to study the in vitro antimicrobial properties of nanocomposite films containing a small amount of thus obtained nanofillers. Methods: The polylactide matrix (PLA) nanocomposite films with drug-intercalated montmorillonite fillers were obtained by casting after intercalation of drugs in aqueous solutions. The efficiency of intercalation has been confirmed by X-ray diffraction (XRD) and Zeta potential measurements. The materials were studied for surface wettability, roughness and mechanical properties during 6 weeks of incubation in phosphate buffer saline, and their bactericidal activity was tested against Escherichia coli bacteria before and after 6 weeks of incubation in distilled water at 37 C. The presence of antibiotics during the incubation was monitored by conductivity and pH measurements. Results: The results indicate that nanocomposite polylactide films with montmorillonite filler intercalated with gentamicin and neomycin tend to degrade faster that their counterparts with non-intercalated fillers, which affects their mechanical properties. However, drug intercalation provided an antibacterial activity, which was confirmed by the presence of zones inhibiting the growth of Gram-negative bacteria for both antibiotics. It was also confirmed that the interaction of antibiotics with clay and polymer matrix did not adversely affect this bactericidal effect. Conclusions: Montmorillonite can be successfully intercalated with both gentamicin and neomycin, and then used as active filler for polylactide films having very good antibacterial properties, therefore their use in biomedical applications can be significantly expanded.

8

An exploratory study on the accuracy of parts printed in FDM processes from novel materials

Nieciąg Halina, Kudelski Rafał, Dudek Piotr, Cieślik Jacek

Acta Mechanica et Automatica

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2020

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Vol. 14, no. 1

59--68

EN

The paper describes the experiment of assessing the chosen geometric characteristics of test models with simple geometry, shaped by the FDM (fused deposition modelling) method of different materials. The influence of the material grade and the degree of infill density on the shrinkage affecting their dimensional deviations and selected surface topography parameters of printed parts was examined and compared. Three different types of materials were used to fabricate the test models, namely HDGLASS and NANOCARBON, two new fibre reinforced composites available in the market and, additionally ABS, a popular monoplastic material. An infill density ratio of 10, 50 and 90% was assumed for each material. Three specimens were made on the same printer for each infill density, which allowed to assess the repeatability of the analysed characteristics. From among many possible shapes of models, a cube was chosen as representing the simplest geometry, facilitating the measurements themselves and the interpretation of the results. New fibre-reinforced materials are more attractive in industrial applications than pure plastics (ABS) due to their mechanical properties or appearance. They are characterized by a relatively low melting point and short cooling time, after which they can return to their original geometry; however, there is a lack of detailed data on the geometric accuracy of parts made of used composite materials. The presented work was to explanatorily broaden the knowledge about the properties of composite made parts. The practical purpose of the research was that on the basis of measurements, it would be possible to indicate among the materials used that particular material whose properties and method of application would allow obtaining the best quality surface and would be the most resistant to thermal loads. An attempt was also made to explain the possible causes of the differences in the observed characteristics of the tested materials.

9

Hybrydowa technologia HPDC&HSC

Dudek Piotr, Sobczak Jerzy J.

Prace Instytutu Odlewnictwa

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2019

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Vol. 59, no. 1

21--36

PL

W artykule przedstawiono rys historyczny oraz stan obecny technologii odlewania z wykorzystaniem ciśnienia zewnętrznego na przykładzie odlewania pod wysokim ciśnieniem (High Pressure Die Casting – HPDC) oraz prasowania w stanie ciekłym (Squeeze Casting – SC). Wykazano podobieństwa i różnice obu technologii oraz obszary wspólne, które zostały wykorzystane do budowy współczesnych, hybrydowych maszyn łączących cechy HPDC i SC. Ostatnie lata przyniosły rozwój konstrukcji maszyn ciśnieniowych, które umożliwiły hybrydyzację technologii z wysoką elastycznością procesu, polegającą na wyborze takiego sposobu przyłożenia ciśnienia zewnętrznego, w którym można pełniej wykorzystać jego wpływ jako czynnika termodynamicznego. Zaprezentowano doświadczenia w zakresie prasowania w stanie ciekłym i stało-ciekłym, uzyskane w badaniach prowadzonych w Instytucie Odlewnictwa w Krakowie.

EN

The article presents the history and current state of the technology of external pressure casting in the case of High Pressure Die Casting (HPDC) and Squeeze Casting (SC). The similarities and differences between the two technologies and the common areas that were used in the construction of modern hybrid machines combining the features of HPDC and SC were shown. Recent years have seen the development of pressure machine designs that have enabled the hybridisation of technologies with high flexibility of the process, consisting in the choice of such a method of applying external pressure in which its influence can be more effectively used as a thermodynamic factor. The following experiments were presented in the field of liquid and solid-liquid casting, obtained from research conducted at the Foundry Research Institute in Kraków.

10

Prowadzenie inwestycji w BIM szansą na ich optymalizację

Dudek Piotr, Machura Marlena

Mosty

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2019

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nr 3/4

49--51

PL

Na temat wykorzystania technologii BIM w infrastrukturze komunikacyjnej, stopnia zaawansowania wdrożenia BIM w Polsce i Wielkiej Brytanii, a także na temat aktualnych działań Stowarzyszenia Techników Polskich w Wielkiej Brytanii w rozmowie z Marleną Machurą mówi Piotr Dudek, wiceprezes STP.