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EN
The article describes a new technology used in wet pressing tissue paper. Extended nip press i.e. Advantage ViscoNip, PrimePress XT Evo and NipcoFlex T are presented. The main benefits of extended nip presses for tissue applications are the potential for higher after-press dryness so helps tissue makers to remarkably reduce energy consumption. New extended nip presses achieve a far sheet bulk than conventional pressing. All presses have the edge control system. In the edge area the local lineload can be controlled and the optimum press nip can be set. This results in a more uniform cross directional dryness profile and sheet adhesion to the Yankee surface.
EN
In this study, mechanical properties and microstructures of extruded aluminum matrix composites were investigated. The composite materials were manufactured by two step methods: powder metallurgy (mixture of aluminum powder and carbon fiber using a turbular mixer, pressing of mixed aluminum powder and carbon fiber using a cold isostatic pressing) and hot extrusion of pressed aluminum powder and carbon fiber. For the mixing of Al powder and carbon fibers, aluminum powder was used as a powder with an average particle size of 30 micrometer and the addition of the carbon fibers was 50% of volume. In order to make mixing easier, it was mixed under an optimal condition of turbular mixer with a rotational speed of 60 rpm and time of 1800s. The process of the hot-extrusion was heated at 450°C for 1 hour. Then, it was hot-extruded with a condition of extrusion ratio of 19 and ram speed of 2 mm/s. The microstructural analysis of extruded aluminum matrix composites bars and semi-solid casted alloys were carried out with the optical microscope, scanning electron microscope and X-ray diffraction. Its mechanical properties were evaluated by Vickers hardness and tensile test.
EN
The paper presents direction of the development and automation area in work places based on plastic processing. Shows types of module components to building such work places. Example of module building - conception project automated work places to manufacturing auto-parts was presents. Project presumptions and principal parts were present such as: material flow subsystem, and automated tool change on presses.
4
Content available remote Poliestrowe tłoczywa warstwowe (SMC)
PL
Na podstawie literatury przedstawiono ogólną charakterystykę poliestrowych tłoczyw warstwowych (SMC), podając przy tym ich skład - zarówno podstawowy (różne typy żywic), jak i rodzaje napełniaczy oraz dodatków modyfikujących. Opisano również sposoby wytwarzania SMC i służące do tego celu urządzenia, a także metody przetwórstwa SMC. Szczególną uwagę zwrócono na nowoczesne "prasy poliestrowe o krótkim ruchu" i scharakteryzowano warunki otrzymywania wyprasek oraz ich właściwości (tabela 1). Przedstawiono różnorodne zastosowanie tłoczyw SMC, uwzględniając zwłaszcza przemysł samochodowy (rys. 9a-f).
EN
A review covering SMC, their basic composition (various resin types), fillers, and modifiers. Equipment and methods used to prepare and to process SMC are described with particular reference to short stroke polyester presses and to conditions of preparation and properties of moldings (Table 1). SMC applications are reviewed with particular reference to the automotive industry (Figs. 9a-f).
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