Experimental Study on Use of Plastic Electronics Wastes in Pavement Blocks

Plastic waste is one of the topmost threats the world is facing today. Blanket ban one use of plastics to is quite difficult to implement considering the lifestyle of humanity. One of the novel ways of disposing of plastic e wastes, by using it constructively. To give a quick fix for plastic e-wastes, re-habitation method which investigated and enforced as a recovering product from Acrylonitrile-Butadiene-Styrene (ABS) as pavement block which is done by liquifying ABS material under safe surrounding with the addition of glass powder at molten stage increasing engraving it in pavement mould. After the process of plastering surface and rapid cooling of ABS results in pavement block. The compressive strength test and Chemical test conducted to find out the suitability of pavement blocks.

Design and optimisation of advanced bearing system for ultra-precision plastic electronics production systems

Purpose The paper aims to use aluminium alloy to substitute steel as the main material of ultra-precision hydro-static bearing system for an ultra-precision plastic electronics production system to lower the manufacturing cost. The total cost of diamond turning and nickel-based electroless coating of an aluminium alloy bearing is expected to be less than the cost of manufacturing a stainless steel bearing. Design/methodology/approach The paper used a large amount of theoretical calculation to obtain optimal specifications of the bearing system. ANSYS modelling was selected to simulate the deflection of the bearing shaft under high oil pressure. Hundreds of measurements were conducted after the bearing had been manufactured. Findings The paper provides industrial application insights on using aluminium alloy with a high-quality nickle-based electroless coating as a successful substitution of stainless steel. This created a more economic hydro-static bearing system. Research limitations/implications Because of the time limit, different rotational speed tests shall be conducted in the future. Practical implications The paper provides implications for the application of nickel-based electroless coating to improve the surface property and bending strength of aluminium alloy, as well as classifying ultra-precision diamond turning as an economic finishing process. Originality/value This paper has identified the importance of aluminium alloy with a nickel-based electroless coating as the substitution of stainless steel in a precision hydro-static bearing system.