Ease E Load Trolleys supply trolleys including Sack Trucks, hand trucks, Garden Centre Trolleys, Dollies, OfficeTrolleys, Post Trolleys and Light Weight Trolleys

1. Plastic Injection Moulding - A Detailed Overview
The history of injection moulding dates back to around 19th
century. Ever since the invention of the injection, moulding
machines have undergone several modifications to attain the form
widely used today. Initially, the injection moulding methods were
based on the die casting technology where immense pressure was
applied to obtain the desired shapes. The plastic injection
manufacturing became widely popular after the Reciprocating
Screw moulding machine acquired the patent rights in 1956.
Raw Materials
There are several kinds of raw materials used for the manufacturing
of the plastic injections. However, the thermosetting
plastic, elastomers and thermoplastic polymers (resins) are widely
used in the production process due the presence of greater viscosity
in these materials.

2. Equipment
The Plastic injection moulding machines have basic component
parts such as material hopper, heating unit, plunger etc. These
machine parts are used to build pressure and keep the moulds in
proper order to give the perfect shape once the molten material
is poured inside it. They are also called presses, working in
accordance with the tonnage ratings. Tonnage is the capability of
the machine to exert clamping force during the manufacturing
process to keep the moulds in closed position. The tonnage may
range between 5 tons to more than 9000 tons depending upon
the rigidity of the raw materials and the projected area of the
moulding parts.

3. Plastic Injection Moulding
Melting Polymers: There is a broad and cylindrical melting unit in the
injection-moulding machine, where the polymer is converted into liquid under
high temperature and pressure. The polymer is filled in an auger, which has an
opening at the bottom. The auger is introduced into the melting unit using a
hydraulic motor. A valve system at the bottom of the cylinder restricts the
passage of the liquid into moulds.
Pouring the Liquid Material into the Moulds
Once the heating process is over, the auger is pushed further to pour the
liquid polymer in to the moulds to give the requisite shape to the injections.
The moulds are compressed under huge pressure to keep them intact and in
proper position. During this process, the liquid is poured twice or more to
ensure there are no air spaces left.

4. Cooling
After the moulding, the entire mould is introduced to
cooling for compact solidification of the plastic
injections, which consumes the major time-period during
the entire manufacturing process. The cooling is done by
passing air or water over the heated moulds or introducing
cold water through small holes on the mould surface.

5. De-moulding
Once the cooling process is over, the compact plastic injections are ready for removal
from the moulds. The clamp on the mould is unlocked to open the mould and derive the
injection. The entire process is completed and the mould is now ready for the next unit
manufacturing.
Plastic injections are affordable compared to other forms of injection. The cost of
production mainly depends on the type of machineries. In the long run, this is a
lucrative business. The plastic injection moulds are widely used in the manufacture of a
number of other plastic products.
Please visit our website for more information on our services pertaining to plastic
injection moulding.