manufacturing method is called casting. Casting varies of different types of
methods, such as: Sand casting, Investment casting and Die casting. The most
common method is Sand casting, also
known as sand molded casting, is
a metal casting process by using sand as the mold material. Sand Casting is the most common casting
process in manufacturing. Nearly all casting metal can be manufactured using
An important item when sand casting is a core. A core is a tool which is used during
the sand casting process to produce internal cavities
and re-entrant angles. The core is normally a
disposable item that is destroyed to get it out of the piece.
An advantage of Sand Casting is that the sand which is
used for manufacturing doesn’t cost as much as other processes would. Also,
sand can work with high melting temperature metals – nickel, titanium and
When Sand Casting you can have the ability to re use the
sand mold mixture to produce other sand casting products. This is a great
advantage as it saves money and time for you. There are many things you should
consider when Sand Casting. For example, some sand has small grain sizes which improve
the mold strength. However, the large grain sizes are more vulnerable. When
reusing sand from previous manufacturing processes, you should always tend to
crush the lumps this would make the new processes smoother to work with without
In Sand Casting, there are generally two sand types you
can use. They are: synthetic sand- which is mixed using silicon dioxide, this
will make the sand stronger and more controllable. This is a big reason why
synthetic sand is used for manufacturing. Also, there is naturally bonded sand.
This is the least expensive sand but this requires a higher melting point in
order for it to be manufactured. This is key for controlling the sands mold
The item I have chosen to be Sand Casted is the fitter
vice. Using Sand casting I believe this is the best way because it is the most
time efficient and it is an easy process to go through. First, I would gather
all the clay, which will serve an essential purpose in the manufacturing
process. You need to make the shape of
the vice in the sand mold which is then left to cool before you are allowed to
pour the molten metal in a hole you have to leave for it to go through. When
the form of the vice is made then you should prepare to put the sand in.
However, you need to make sure the sand is dabbed down well enough to cover all
the holes and gaps which are left. You need to make sure the sand is clean and
is removed of the debris. You will then need to leave the sand until it hardens.
This will then lead you to removing the sand but you have to be really careful as
it is not strong enough to withhold damage. For safety reasons, have a partner
with you. This will be really helpful as you both can hold the product and our
partner can gently pull the sand out. The next step will require you to put on personal
protective equipment (PPE) as it is a dangerous procedure. You will need now
pour the molten metal carefully into the sand mold and then let the product cool
down. Now for the final part, you will break open the mold with any appropriate
item, but you should make sure the mold has solidified first before you begin
to break. Once the mold is broken, carefully take out the product and make sure
to put it in cold water because the product will be very hot as it was roasted
in high temperatures in the last step. Finally, this is the sand casted vice
The material for the vice was cast iron as it is the most
common material used for a vice. The surface finish after the sand casting
process is dependable on how the process went. You can
expect poor quality but commonly it would be good but not excellent.
Blow moulding is the manufacturing process, which many types
of plastic parts are moulded. This is also used for making bottles. When considering
using Moulding as a manufacturing technique you need to know the types of blow
moulding. These are: Injection blow moulding, injection stretch blow moulding and
extrusion blow moulding. However, in this case the blow moulding process starts
with melting down the plastic and forming it into a parison. This is a plastic
part with a hole in one end, which compressed air can pass through.
The parison is now fixed into a mould and air is being blown
into the parison. The next step is now the air pressure pushes the plastic out
to match the mould this would mean the plastic will have to be cooled and
hardened before the mould opens up, which would make the part release.
I have chosen the plastic bottle as the item I want to be
manufactured. This will be through Blow Moulding. In my opinion, the best way
to make a bottle is through blow moulding as it is the most common method and
the easiest way to do it. Firstly, I would get all the plastic and then place
it in the hopper which keeps the plastic. The plastic is kept in rough form, and then
you would turn the motor to power the large thread to feed the plastic in a heated
atmosphere. The plastic is now melting and eventually will become a liquid, which
is then fed into the mould. The air which is now going to be forced into the
mould will give the plastic the shape of a bottle. Finally, the mould is
removed from the machine and now is set out to be cooled.
The advantages of Blow Moulding are very good for a
manufacturing company. The blow moulding process allows you to get your
products out at a faster rate. This is beneficial to you because you can then
focus on making more products. Also, through blow moulding you can make a
greater amount of quantity compared to other products and in a reduced amount
of time. The tools and equipment are easy to get hold of as they are cheap and
it allows the products to be recycled as well.
The disadvantages of blow moulding are that is that a polymer
is always needed to make the work happen. Without a polymer, your work can be
withheld and this can hold up your work schedule. A polymer also has a bad environmental
affect. This is then polluting the world as you can imagine how many people are
using plastic bottles today. A big disadvantage would be the waste of the materials.
The materials are common to be wasted as the thickness and measurements of the
products are very specific and have to be accurate. Through blow moulding, you are
able to make mass productions. In this case if the measurements are slightly
off the product will not be good and will have to be scrapped.
Blow moulding most commonly has poor surface finish but over
the years it is improving day by day but overall it is poor.