What’s a high speed injection molding machine？

2025-02-19

The High Speed Injection Molding Machine is a device that can perform plastic injection molding at a very high speed.

It is a type of injection molding equipment designed for efficient and high-precision production. Its core features include ultra-high injection speed, fast response capability, precision control system and optimized mechanical structure. High repeatability, the small error in mold opening/injection end position (≤0.1 mm) to ensure product consistency

The High-speed injection molding machine is a precision equipment with ultra-high injection speed (≥140mm/s), millisecond-level response servo system, high-rigidity mechanical structure and intelligent control as its core. It is optimized for the efficient production of medical, thin-wall packaging and electronic precision parts. This machine usually has the following characteristics：

injection moulding

High-speed injection of High Speed Injection Molding Machine

The injection speed of a high-speed injection molding machine is usually not less than 200 mm/s. It can even reach higher speeds, such as 800 mm/s or 500 mm/s, etc. This high-speed injection capability enables the machine to complete the injection process in a very short time, thereby improving production efficiency.

High injection speed

The maximum injection speed can reach 350–650 mm/s, depending on the machine model and technical solution:

Servo drive system: up to 600 mm/s (such as servo drive high-speed injection molding machine)
Hydraulic system with accumulator: up to 650 mm/s (such as Sumitomo Heavy Industries packaging series)
Acceleration performance: Some models can accelerate to 350 mm/s within 25 milliseconds.
Response speed: The hydraulic system response time is as low as 30 milliseconds, and the servo system responds faster .
It is said that its response speed is 2.5 times that of the electric belt drive).

High precision and stability

Adopt closed-loop servo control system to control injection pressure and flow rate in real time (maximum injection pressure 350MPa) to improve product repetition accuracy.
Double-line rail balanced guide design reduces friction resistance and ensures injection unit stability.
High rigidity design of template reduces deformation and uniform clamping force distribution.

Energy-saving and efficient

The servo pump system supplies energy on demand, reducing energy waste.
Some models increase the standard machine speed by 10%-50% through the injection speed increase function, further reducing energy consumption.

High precision and stability of High Speed Injection Molding Machine

The high-speed injection molding machine adopts advanced servo motor and synchronous control technology to ensure high precision and stability of the injection process.

The high precision and stability of high-speed injection molding machines are derived from the integrated design of electromechanical and hydraulic systems: micron-level motion accuracy is achieved through servo closed-loop control, high-rigidity structure suppresses vibration deformation, and dedicated algorithms optimize dynamic response.

Servo closed-loop control system

Uses real-time closed-loop control of injection pressure and flow, with pressure stability of ±0.02kPa, and position repeatability of ±0.01mm
Imported Swiss pressure sensors combined with optimization algorithms make product weight error <0.01g
High-speed response servo motors (such as ISC II systems) accelerate to 350mm/s within 25ms to meet the needs of thin-walled products

High rigidity and low friction mechanism

Dual linear guide design reduces friction resistance, and cooperates with balanced dual hydraulic cylinders
to achieve high repetitive accuracy of injection unit.
Tie-bar free structure avoids lubricating oil pollution and reduces mechanical friction.
High rigidity template and frame (finite element optimization design) reduce deformation and even force distribution.

Stability guarantee measures

Hydraulic and drive system

Optimize oil circuit, reduce pressure loss, and ensure smooth movement.
Fully closed-loop hydraulic control, providing good low-speed stability and extremely low product weight fluctuation.

Energy saving and environmental protection of High Speed Injection Molding Machine

Modern high-speed injection molding machines usually adopt servo drive and energy-saving technology. Moreover, it can significantly reduce energy consumption.

For example, the energy saving rate of servo energy-saving injection molding machines can reach 30%-70%. In addition, these machines also equip with efficient cooling and heating systems to optimize the production process.

Fully electric drive (most efficient solution)

Using servo motor direct drive to avoid energy loss in the hydraulic system, it saves 30%-60% energy compared to traditional hydraulic presses.

The full motor can save energy up to 60%, which is one of the most energy-saving solutions currently.

Servo hydraulic energy saving transformation

Frequency conversion technology:By adjusting the oil pump motor speed to match the load demand, the overflow loss is reduced
The energy saving rate is generally 25%-65%, but there are problems such as slow dynamic response and poor adaptability to low-speed overloa
Servo control system: Haichen HCK series runs at a reduced speed during the pressure holding stage and stops during the cooling stage, saving 20%-80%

High speed injection molding machine: Suitable for thin-walled products

High-speed injection molding machines are particularly suitable for the production of thin-walled products, such as mobile phone cases, TV LCD panels, etc. This machine can quickly fill the mold and reduce the molding cycle time while maintaining the dimensional accuracy and surface quality of the product.

Diverse applications

High-speed injection molding machines widely use in many industries, including medical equipment, aerospace, automobile manufacturing, consumer electronics, etc. These industries have strict requirements on production efficiency and product quality, and high-speed injection molding machines can meet these needs.

Precision medical products

Syringes, blood collection tubes, culture dishes, etc. require pollution-free and high precision
Complex structural parts: high-speed injection can reduce internal stress and deformation.

Thin-wall packaging containers

Fast food boxes, bottle caps, barrels, etc. (such as Sumitomo packaging series.)
Thin-wall deep cavity products: high-speed filling to avoid premature curing.

3C electronic precision parts

Mobile phone accessories, electronic connectors, plastic gears, etc.
Optical components such as light guide plates (LGP) require high surface accuracy.