PENGARUH UKURAN RISER TERHADAP CACAT PENYUSUTAN DAN CACAT POROSITAS PRODUK COR ALUMINIUM CETAKAN PASIR
Abstract: This experiment is
aimed to determine the influence of riser size on shrinkage and porosity
defect of aluminium
castings by using sand
molds. The raw material
of aluminium alloy
in this experiment
is derived from
waste of motorcycle piston.
Bottle shape riser
is used with the
size of neckis 25 mm ofdiameters
and 5
mm of height.
Variations of riser
size are: 30
mm of diameters with 100 mm
of height, 40 mm of diameters
with 56 mm of height, and 50
mm of diameters
with 36 mm
of height. The
shrinkage testing is conducted
by comparing the
castings volume to
the molds volume.
The observation of shrinkage
cavity is done
by cleaving the
castings into two pieces. The
porosity is tested
by comparing the
true density to
the apparent density. The true
density testing uses ASTM E-252 standard.The result of this experiment are
is to produce
castings which low
shrinkage and porosity defect is used riser which large of
diameters and height size.
Penulis: I Harmonic Krisnawan,
Bambang Kusharjanta, Wahyu Purwo Raharjo
Kode Jurnal: jptmesindd120003
