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Investigation Of The Effect Of Moulding Sand (natural & Synthetic) On Casting Of Flange Using Aluminium
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These exists however some general characteristic on the basis of which moulding mixture are classified.
In
hand moulding, usually facing and backing sand are used. Facing
mixture are prepared usually from fresh initially material and has good
technological properties. The fine grain structures of sand are been
used hence the working layers of the mould which enters into direct
contact with the liquid metals made. The thickness of this layer is 10 –
15mm depending on the thickness of the casting.
Backing sand is
meant for filling the remaining part of the mould and consists of
already used mixture, which periodically is refreshed by addition of
small amounts of silica sand (2 – 3%) and clay (1-2). Integrated
moulding mixtures are used mainly in machine moulding mixtures are used
mainly in machine moulding mixtures are used mainly in machine moulding
with aim of simplifying the process of preparation, transportation and
compaction of the mixture of the mixture, as well as ensuring high
labour productivity. They have sufficient good technological properties
and produced through refreshing of already used moulding mixtures with
sand, clay and other materials moulding mixtures for green moulds must
have good permeability and as far possible with little gas forming
ability. In this regard, it is recommended that bentonite be used as
binder, their compressive strength must be within the range (0.3 –
0.6von/m2) source?
All materials used for the manufacture of sand mould and cores are termed moulding materials.
In
foundry practice, the quality of the mould determines to a large extent
the quality of the cast metal product, with the exception of special
moulding materials used in the foundry for the casting non-ferrous or
light alloy products. Thus the study of foundry and is very important.
In
general, the control of sand preparation to ensure the appropriate
limits of moisture, permeability, strength and other properties is a
necessary consideration in order to guarantee good mould and minimize
fetling work, with maximum output of cast metal products. Principal
ingredients of moulding sands are:-
1. Silica sand grains
2. Clay or binder
3. Additives and of course moisture
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ABSRACT - [ Total Page(s): 1 ]This study tend to investigate the effect of synthetic and natural moulding sand on casting of flange like component. In this study FUTA logo was selected to be cast using aluminium metal. The casting was carried out and the result was analysed according to the quality of casting. It was discovered that for large size component using aluminium, it is better to use synthetic sand and which is hereby recommended for casting Aluminum large size component. ... Continue reading---
