Sandcasting: die opening and deposits the metallic powder into

Sandcasting: In sand casting an object is created
by sand mold. This process contains pouring of the molten metal in to the mold
cavity. After this you have to cool down the molten metal but this has to be
cooled in room temperature so the metal will become solid. That’s the whole
point of cooling is down. Then the metal object is separated from the mold. Also
you have to what sand need to be used for the material but mostly green sand is

Casting:  Investment casting is also a
manufacturing process where a wax pattern is coated with ceramic material. After the ceramic material is
hardened the internal geometry takes the shape of the casting. Then you have to
melt the wax and molten metal so you can pour that inside the cavity where the
design was used to be before. By doing this the metal hardens inside the
ceramic mold so when it gets solid the metal casting will be broken out. This
is called Investment casting.

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Die Casting:



Sintering: this starts with the metal in
powdered form. Then the metal poured into the feed ram. After that the feed ram
moves across the die opening and deposits the metallic powder into the die. The
compression ram compresses the metallic powder in the die with substantial
force when its finished the metallic powder fuses together then compressed part
is ejected out of the die. Then the feed ram then moves the compressed part
away a new cycle begins again.  Parts
continue to be fed into the die and are then compressed and ejected. After that,
the compressed parts are placed in oven and heated to a very high temperature
which further sinters the metal into a totally solid form. But this can take several
days as the parts are allowed to cool down gently.

Rolling: This is a metal forming process where
the metal is passed through one or more pairs of rolls which can reduce the
thickness and also to make them even. Rolling has 2 types they are hot rolling
and cold rolling. Where hot rolling uses large pieces of metal for example slabs.
Then it heats the metal above recrystallization temperature. After this the
metal piece will be bent using the rollers forming thin cross section on the
metal. Also the good thing about hot rolling is it reduces the grain size of
metal but maintains an equal microstructure. Now the cold rolling is where
metal goes through the rollers but the temperature is below the recrystallization.
By doing this it increases the hardness of the metal.




casting & pressure die-casting of metallic materials:

In the sand casting process you need a mold to create a empty cavity inside
the sand so you can form the shape of the wanted part. As we see from this the
pattern this can be made out of different material for example wood, polyurethane
even this can be made out of plastic.  After
that’s done the pattern becomes part of core box which is very important when
it comes to final production. A core box is needed so you can put the shape
inside the core box fill them up with sand then it forms the shape that you
wanted. The sand is chemically bonded so it can hold the shape. After that’s done
the molten metal is poured.