The most used bricks in house building NDjamena, city of Chad which is situated semi dry arid area with 600 millimeters pluviometry per year and 50 °C as highest temperature, are raw clay bricks, terracotta or ciment block. have strong sensibility water weak resistance to compression. cement block high thermal conductivity contrary the adobe their manufacturingcontribute destroy environment. a...

prior animal models have shown that rats sustaining 3-second immediate spinal cord compression had significantly better functional recovery and smaller lesion volumes than rats subjected to compression times of 1 hour, 6 hours, 3 weeks, and 10 weeks after spinal cord injury. we compare locomotor rating scales and spinal cord histopathology after 3 seconds and 10 minute compression times. . ten ...

Currently, approximately 70-80 % of casting production of ferrous alloys is done with sands containing bentonite (green sands). Information on an amount of active bentonite in moulding sands, after shakeout of casting, is necessary in the rebounding process of bentonite sands – under real casting house conditions. It decides how much of fresh bentonite should be added to moulding sands, thereby...

Nowadays, polymer-based carbon-plastics confidently displace common tribotechnical and structural materials (steel, aluminum, titanium, etc.) in the automotive, metallurgical, agricultural industries. It happens due of fact that surpass steel aluminum 5 7 times, respectively terms strength, they are also characterized by low weight ease processing. An equally important factor is possibility man...

B. Gal, K. Granat, D. Nowak, Wroclaw University of Technology, Department of Foundry Engineering, Plastics and Automation and Automation, Wrocław, Poland The presented basic research was aimed at determining a correlation between compaction degree of moulding sand and its permittivity εr at 2,45·10 9 s-1. The measurement results make a basis for mathematical description of a multilayer technolo...

This paper deals with the mathematical modeling of the coupled flow/deformation problem characterizing the industrial production of a composite material by injection moulding. The role of inertia, typically non–negligible during a short early time, is studied in terms of models of reduced complexity. Using the theory of characteristics and some considerations on the energy of the system we are ...

In this study, the Taguchi method is used to find the optimal process parameters for an injection moulding machine that was used to produce a consumer product (plastic tray) from polypropylene (PP) plastic material. An orthogonal array (OA), main effect, signal-to-noise (S/N) ratio, and analysis of variance (ANOVA) were employed to investigate the bending characteristics of the tray under a con...

M. Łucarz, AGH University of Science of Technology, Engineering of Faculty Foundry, Kraków, Poland The paper presents the results of the research on the used moulding sands subjected to mechanical and thermal reclamation at different stages of the process in the foundry. The research on thermal treatment was carried out in an experimental thermal reclamation appliance. The effects of the proces...

Understanding the effect surface production has on polymer properties is important in design of advanced materials. The aim this study was to determine how moulding process affected rate hydrolysis and topography, chemistry physicochemistry PVAc moulded, hydrolysed surfaces. Three different mould materials were used produce compression moulded sheets which treated with aqueous NaOH at a range c...