Common Types of Injection Molding Machines

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Injection molding machine, also known as injection machine, is the main molding equipment for making thermoplastic or thermosetting plastics into various shapes of plastic products using plastic molding molds. The injection molding machine heats the plastic, applying high pressure to the molten plastic so that it shoots out and fills the mold cavity.

Classification according to the power source of the injection molding machine

Mechanical manual injection molding machine

The injection molding machine first appeared in the form of manual mechanical operation, and it was just the initial stage of the invention of the injection molding machine in the last century. The clamping mechanism and the injection molding mechanism all use the lever principle to generate the clamping force and injection pressure, which is also the basis of the modern toggle-type clamping mechanism.

Hydraulic injection molding machine

With the development of industrial technology, especially the development of hydraulic control and other technologies, the fully manual mechanical injection molding cannot meet the production requirements, and the hydraulic injection molding machine was born.

The hydraulic injection molding machine is easy to control the action speed and pressure, and the clamping pressure is large (currently the world's commercial maximum clamping force injection molding machine is 8,000 tons, and the minimum consistent minimum clamping force injection molding machine is 5 tons), precise control, and can meet special purposes needs. This is also the main reason why the hydraulic injection molding machine is timeless and prosperous. Judging from the current development, hydraulic injection molding machines will still occupy the main position for a long time in the future.

Pneumatic injection molding machine

Pneumatic injection molding machine is a desktop injection molding machine with compressed air as the power and hydraulic cylinder as the actuator. It not only has the characteristics of low energy consumption and lightweight equipment of pneumatic system, but also has high stability and controllability of hydraulic equipment.

 injection molding machine

Electric injection molding machine

Compared with the traditional full hydraulic injection molding machine, the full electric injection molding machine completely abandons the hydraulic driving system generated by the full hydraulic oil pump motor in the power drive system, and adopts the servo motor drive, and the transmission structure adopts the ball screw. And synchronous belt, which greatly improves the control accuracy of the power system of the injection molding machine, completely solves the problem of hydraulic oil pollution to the environment, and reduces the noise generated by the machine.

The all-electric injection molding machine has the advantages of energy saving, environmental protection, low noise, accurate measurement, etc. The control system of the all-electric injection molding machine is simpler than that of the hydraulic machine, the response is also fast, and it has excellent control accuracy, which can provide complex synchronous actions and shorten the production cycle; The ultra-large and high clamping force injection molding machine is limited by the transmission mechanism and the cost is controlled, so it is not suitable for the ultra-large and high injection molding machine.

About NPC

NPC Precision Machinery Co., Ltd is a manufacturer of precision plastic injection molding machines which combine professional R&D, manufacturing and after-sales services.

For more information about injection molding machines, please do not hesitate to contact us.


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