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Basic Parts of a Plastic Injection Molding Machine

A Plastic injection molding machine or the injection press is used by most plastic manufacturers to produce plastic through the process of injection molding. Through this machine, the process of molding plastic products can be quickly done, which can either be in vertical or horizontal position. There are two major parts that make up the plastic injection molding machine, and these are the injection unit and the clamping.

The injection unit is part of the machine where plastic is being melted. The parts that work during the injection process are the hopper, reciprocating screw, barrel, heater and the nozzle. When the plastic granules have been added to the hopper, it will slowly go down into the barrel. It will then be pushed by the reciprocating screw through the heater. Using the appropriate temperature the plastic will then be melted and through the nozzles it will be passed to the clamping unit.

This is the part of the plastic injection molding machine where the molding process will take place. The clamping unit consists of mold cavity, mold, and the moveable platter. From the nozzles, the melted plastic will be pushed to the mold cavity where the plastic is going to be cooled down and hardened. After it has hardened, it will be transferred into the mold and to the moveable platter. The plastic will be removed from the plastic injection molding machine to clean its surface. It must be free from any excess plastic and once it is already clean it can now be stored for finished product.

The plastic injection molding machine is very useful especially to those who are involved in the plastic business. More plastic manufacturers use this machine because it will speed up the process that will result for increase in the productivity and profit.

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 it 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, you may visit us at
https://en.wikipedia.org/wiki/Injection_moulding, this will be more information to help you..

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