Do you know the name of the process by which most plastic solid
materials are produced? It is called Injection molding. It is a simple
process. However, the process may require practice for efficiency. What
is the process of Injection molding? During the process of plastic injection molding,
the plastic is heated till it melts and is introduced, under pressure
(injected), into a mold. The mold may be made up of any metal such as
steel or aluminum. The molten form is then allowed to cool down and set
into a solid form.
The plastic material thus formed is then retrieved
out of the mold.
The actual process of plastic molding is just an expansion of this
basic mechanism. The plastic is let into a barrel or chamber under
gravity or force-fed. As it moves down, the increasing temperature
melts the plastic. Then, the molten plastic is forcibly injected into
the mold under the barrel with an appropriate shape. As the plastic
cools, it solidifies. The plastic molded like this has a reverse shape
than that of the mold. A variety of shapes both 2D and 3D, can be
produced by the process.
The process of plastic molding is cheap due to
the simplicity involved and the quality of the plastic material is
modifiable by changing the factors involved in the custom injection molding
process:
- The pressure of injection can be changed to change the hardness of
the final product.
- The thickness of the mold also governs the quality of the article
produced.
- The temperature for melting and cooling determine the quality of the
plastic formed.
ADVANTAGES The major advantage of injection molding is that it is very
cost effective and fast. Apart from this, unlike the cutting processes,
this process rules out any undesired sharp edges. Also, this process
produces smooth and finished products that require no further
finishing.
For more knowledge on injection molding,
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George is a well-known author who writes on the topics related with Injection Molding, Free CAD Software and CNC Milling for the site www.emachineshop.com.
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