How Does a Servo Hybrid Injection Molding Machine Work?

Injection molding is a widely used manufacturing process for producing plastic parts and products of various shapes and sizes. Over the years, technological advancements have led to the development of more efficient and precise injection molding machines. One such innovation is the servo hybrid injection molding machine, which combines the benefits of hydraulic and electric systems to improve performance and energy efficiency.


Understanding Injection Molding


Before delving into the specifics of servo hybrid injection molding machines, it's essential to grasp the basics of injection molding. This process involves melting plastic pellets and injecting the molten material into a mold cavity to create a desired shape. Once the plastic cools and solidifies, the mold opens, and the finished product is ejected.


Traditional hydraulic injection molding machines have been the industry standard for many years. They use hydraulic pumps and cylinders to control the movement of the machine's components, such as the injection unit and the clamping unit. While effective, hydraulic systems have some drawbacks, including energy inefficiency and higher maintenance requirements.


The Innovation of Servo Hybrid Technology


A servo hybrid injection molding machine combines hydraulic and electric systems to overcome the limitations of traditional hydraulic machines. Here's how it works:


Injection Unit: The injection unit of a servo hybrid machine is equipped with an electric motor and a hydraulic system. The electric motor drives a high-precision screw, which is responsible for melting and injecting the plastic material into the mold cavity. This electric-driven injection process offers superior accuracy and repeatability compared to traditional hydraulic machines.


Clamping Unit: The clamping unit of the machine, responsible for holding the mold closed during injection, uses hydraulic power. However, it employs advanced servo technology to control the hydraulic pressure precisely. This ensures that the mold is held closed with just the right amount of force, reducing energy consumption and minimizing wear and tear on the components.


Energy Efficiency: One of the key advantages of servo hybrid technology is its energy efficiency. Unlike traditional hydraulic machines that constantly run the hydraulic pump, servo hybrids only use hydraulic power when necessary. The electric motor can modulate its speed and torque to match the required demand, resulting in significant energy savings.


Precision and Speed: Servo hybrid machines offer exceptional precision and speed. The electric-driven injection unit allows for precise control of the plastic material's flow, making it easier to produce intricate and high-quality parts. Additionally, the quick response of the servo system enables faster cycle times, increasing overall productivity.


Reduced Maintenance: Servo hybrid machines typically have lower maintenance requirements than traditional hydraulic machines. The reduced wear and tear on hydraulic components, along with the more precise control of the system, contribute to longer machine lifespan and reduced downtime.


Kaiming KDK Series Hydraulic-Electric Hybrid Machine


● KDK series have clamping 100, 140, 180, 220, 260, 330, 400, and 450 tons

● High injection speed and high precision

● Innovative design, application-oriented injection units

● Intelligent movement control for short cycle time

● High performance and lower power consumption


KDK series is innovated and developed on the base of Kaiming’s matured servo motor injection technology. The machine adopts an energy-saving, high-injection speed design, it’s suitable for small electronic products and medical plastic parts, like cell phone cases. High stability for injection speed and molding. High precision, linear guides for low friction provide fast response, clean operation, and accurate pressure control.

Servo hybrid injection molding machines represent a significant advancement in the plastic manufacturing industry. By combining the best features of hydraulic and electric systems, these machines offer improved precision, energy efficiency, and reduced maintenance costs. As manufacturers seek to produce higher-quality products while minimizing their environmental impact, servo hybrid technology is becoming increasingly popular in the injection molding industry. It's safe to say that these machines are shaping the future of plastic manufacturing, enabling more efficient and sustainable production processes.