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May 26, 2011

Injection molding and injection molding machines

 Making polymers is a fantastic science, as well as shaping plastic objects.
One of the most common methods of shaping plastic resins is a process called injection molding. Injection molding is accomplished by large machines called injection molding machines, which are classified mainly by the type of system that drives them: Hydraulic, electric, or hybrid.

Hydraulic injection machines uses ram system for its clamping mechanism. This type of machine is used by majority of molding companies.

Electric injection machines are driven by motors. Unlike the hydraulic machines, which continuously pump hydraulics to the cylinder throughout the whole molding cycle, an electric machine only makes use of energy during closing and opening of the clamping unit. It uses toggle system for its clamping mechanism in order to build up tonnage. It is also faster, quieter, and has higher accuracy, but it is also known to be more expensive.
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