Wyniki wyszukiwania - Biblioteka Nauki

1

The application of a photopolymer material for the manufacture of machine elements using rapid prototyping techniques

100%

Andrearczyk A.

Logistyka

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2015

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tom nr 4

8628--8635, CD3

EN

The paper discusses the application of polymer resin for 3D printing. The first section focuses on rapid prototyping technique and properties of the photopolymer, used as input material in the manufacture of machine components. Second part of the article was devoted to exemplary 3-D-printed elements for incorporation in machines. The article also contains detailed description of problems encountered in implementation of the selected rapid prototyping technology and the ways to deal with them.

PL

W artykule omówiono zastosowanie żywicy polimerowej w wydruku przestrzennym. W pierwszej części przedstawiona została technologia szybkiego prototypowania oraz właściwości fotopolimeru wykorzystywanego do tworzenia elementów maszyn. Druga część artykułu została poświęcona przykładowym wydrukom i ich zastosowaniom w maszynach. Artykuł zawiera również opis problemów na jakie napotkano się w trakcie korzystania z wybranej technologii szybkiego prototypowania oraz ich eliminację.

2

Laser Direct Imaging system for high density interconnects on PCB

84%

Barbucha R. , Kocik M. , Mizerczak J.

Przegląd Elektrotechniczny

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2008

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tom R. 84, nr 3

54-56

EN

The increasing demands for miniaturization and better functionality of electronic components and devices have a significant effect on the requirements facing the printed circuit board (PCB) industry. This article shows an alternative method for creating electric circuit patterns on PCB in high density interconnects technology. In this article a prototype system for laser direct imaging as well as results of imaging examples are presented.

PL

Nowoczesne urządzenia elektroniczne są budowane z coraz mniejszych i sprawniejszych układów elektronicznych. W niniejszym artykule przedstawiono laboratoryjne urządzenie do bezpośredniego naświetlania ścieżek elektrycznych na PCB pokrytym fotopolimerem wykorzystując w tym celu technologię LDI (Laser Direct Imaging). W niniejszym artykule przedstawiono prototyp urządzenia do bezpośredniego naświetlania laserowego jak również przykładowe wyniki naświetlania ścieżek na płytkach drukowanych.

3

Assessing the Surface Distortion of Plaster Molds Made with the Use of SLA Models

67%

Shumkov A. A. , Ablyaz T. R. , Muratov K. R.

Archives of Foundry Engineering

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2017

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tom Vol. 17, iss. 3

123--126

EN

The method of determining the accuracy of polymer molds in plaster forms has been discussed. Distortion of the surface of molds and plaster molds has been assessed. It has been found that the presence of monolithic and porous structure in the samples does not change the accuracy of the surfaces when forms are prepared for removing the material of the model. It has been found that in case of full-mold casting it is more expedient to form the mold cavity with cellular adjustable structures of molding prototypes.

4

The experimental investigation of seepage control in different sand soils using photopolymerization

67%

Akoguz H.

Acta Geophysica

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2024

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tom Vol. 72, no. 2

983--997

EN

Seepage control is critically essential for dams, slopes, and the stability of many engineering structures, developing over many years using different methods. This study presents a novel approach for seepage control using the photopolymerization technique to form an impermeable crust at the soil surface. Effects of exposure duration (5, 10, 15, and 30 min) and light intensities (140, 550, 710, and 1000 W/m2) on the seepage control effectiveness of four different sand soils were investigated by using the photopolymerization technique. The three-point bending, permeability and acid rain simulation tests were performed to illustrate the effect of photopolymerization on the seepage control of sand soils. Furthermore, the influence of photopolymerization on the microstructure of soils was examined with the aid of SEM analysis. The results indicated that the photopolymerization technique could improve the crust strength, acid rain durability, and permeability of sand soils. The crusts at the surface layer of soils were formed after the photopolymer was applied to the sand surface and then exposed to UV light. These crusts of different soils have bending strengths and thicknesses in the range of 34.57 and 68.07 MPa, 2.13 and 6.18 mm, respectively. The increase in exposure duration and light intensity, resulted in the gradual increment of soil crust thickness. On the other hand, the increase in light intensities have more effective on the crust thickness. The formed soil crust has been provided an impermeable surface that prevents the weight loose from the surface of the soil under acid rain conditions. The SEM analysis indicated that the photopolymerized gels were homogeneously distributed between the grains in all samples, although the grain distribution of soils were different. Since the photopolymerization method has a short treatment duration and is easier to apply on the sand surface, the occurrence of the crust at the soil surface by this technique may open a new and improvable path for seepage control. The obtained results showed that the photopolymerization method is promising for repairing, restoring, and strengthening the construction materials in different engineering areas, as well as seepage control.