Choosing the Right Injection Molding Machine

The type and characteristics of the machine have an influence on the result obtained (finished part). Injection molding machines can be classified according to the type of driving system they use, thus dividing them into hydraulic, electric, and hybrid models.

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Hydraulic injection molding machines

These have a hydraulic pump connected to a constant-speed electric motor.

Advantages:
&#; They are capable of producing large parts.
&#; They have constant injection and extraction.
&#; They are robust and therefore durable.
&#; Spare parts for these machines are easy to find.

Disadvantages:
&#; They consume a lot of energy.
&#; They do not allow for high-precision molding.
&#; There may be a risk of oil leakage.

Electric injection molding machines

The drive is carried out by servomotors with numerical control. They offer various functionalities.

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Advantages:
&#; They consume very little energy.
&#; They offer high precision and reliability.
&#; They are easy to operate.

Disadvantages:
&#; They require a larger initial investment than hydraulic machines.
&#; The parts must be replaced periodically, which means regular maintenance.

Hybrid injection molding machines

Hybrid machines are driven by a servomotor coupled to a hydraulic pump, also known as a servo pump. This system allows for continuous adjustments according to actual electricity needs, resulting in fewer emissions, less noise, and energy savings.

Advantages:
&#;They consume less energy than hydraulic injection molding machines since hydraulic pressure is not used constantly, mainly due to the electrical part.
&#; They offer high precision.
&#; They have a good clamping force.

Disadvantages:
&#; They can present repeatability problems.
&#; Both the electrical and hydraulic systems need to be serviced.

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