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Jan 26, 2018

Injection Molding


One of the most popular methods to mold plastics that are used to form 3D shapes. It is based on the method of molten die casting and consists of the clamping unit and the injection unit.


The Process


The plastic resin is put into the hopper, which then releases the plastic pellets from the feed section into the compression section, where the frictional heat is created. The plastic is pushed through a protracted chamber using a reciprocated screw. The melted fluid-like plastic, known as melt, is forced through the nozzle into a closed, cooled/hot mold. The melt can be easily molded into the desired shape and size of the mold.


When the mold is completely filled and being pressurized, part of the cooling process is performed here. Finally, the ejection cylinder unclamps the mold and starts pushing the part out of the mold onto a conveyor.




The advantages of this process are:


Used for making three-dimensional objects.

Minimized waste and able to recycle material.

Able to create detailed features and complex geometry.

Enhances the strength to the part after it has been molded.

Ability to use multiple plastic types simultaneously.

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