Home / Why are swing arm robot the most accurate in injection molding?

Why are swing arm robot the most accurate in injection molding?

2024/03/01 By 兰兹

Swing Arm Robot 30

In injection molding, if the accuracy of the swing arm robot in grabbing plastic raw materials is not accurate enough, it will lead to position deviation and uncoordinated pickup time, leading to problems such as failure to take out and equipment alarm shutdown. And swing-arm robots’ take-out accuracy is the best in injection molding. This product guide will examine why swing-arm robots are considered the most accurate in injection molding.

Structure and design of swing arm robot

The main reason for the precision and robustness of swing arm robots is their mechanical structure. Their robots usually use high-strength, high-tension aluminum alloys and precision linear guides, which have durability, rigidity, and resistance to external impacts. This mechanical structure allows them to withstand high loads, vibrations, and repetitive movements without affecting their performance or reliability. The segmented structure of swing-arm robots enables them to perform joint activities and maneuvers in multiple degrees of freedom, mimicking the flexibility and range of motion of the human arm and wrist, and can rotate products 90°. Each part has powerful motors, actuators, and sensors to precisely control and coordinate movement, ensuring smooth and accurate operation during complex tasks.

Swing Arm Robot 31

Flexibility of swing arm robot arms

The flexibility of the swing arm robot’s arms lies in their ability to rotate and move. Each joint in the arm of the swing-arm robot provides rotation or linear motion. The fixture is installed on the front part of the arm, which can rotate 90°. It also has an adsorption fixture on the fixture. We installed a sensing device. It facilitates easy mold changes and has a hydraulic shock absorber to ensure stable and smooth front and rear strokes.

In addition, manufacturers can choose the number and type of joints and the length and shape of each section to optimize robot arms for a specific task or workspace. This modular approach allows them to adapt to a variety of environments and perform a variety of functions. By adapting to the contours of the mold and the working environment, swing-arm robots can achieve unrivaled precision when handling delicate plastic materials.

Advanced control system for swing arm robots

Topstar independently developed the control system of the swing arm robot. This system uses high-performance servo motors, actuators, and drive mechanisms to accurately control the movement of each joint in the robot arm. By adjusting the motor’s speed, acceleration, and position, the control system can execute a smooth and accurate motion trajectory, allowing the robotic arm to reach the desired position and direction accurately. The overall energy efficiency increases by 20%. Additionally, we equip it with a handheld controller, making the operation more convenient for the operator. The control system combines sensor feedback to monitor and adjust the robot’s movement in real-time. Encoders, resolvers, and other position sensors can provide accurate feedback on each joint’s position, speed, and acceleration, allowing the control system to compensate for errors and interference and maintain Precise motion control, reducing downtime.

Swing Arm Robot 34

Customized end-of-arm tools

Customized end-of-arm tools (EOAT) enable swing arm robots to perform specific tasks accurately and reliably. Through unique design and customization, they can be applied to horizontal injection molding machines of 50T~250T and quickly remove the runner from the injection molding machine mold. We put the runner and finished product into the granulator next to the machine for immediate recycling. Therefore, manufacturers can design EOATs with specialized grippers, fingers, suction cups, or magnetic attachments to address different plastics’ specific properties and characteristics. This customization ensures objects’ safe and stable gripping, reducing the risk of slipping, damage, or misalignment during operation.

Maintain accuracy during high-speed operation

One of the key factors that enable a swing arm robot to maintain accuracy during high-speed operation is its advanced motion control system. These systems utilize complex algorithms and feedback mechanisms to precisely adjust the speed, acceleration, and deceleration of the robot’s swing arm joints. By precisely controlling the movement trajectory of the robotic arm, the control system minimizes errors and deviations, ensuring that the end effector accurately follows the desired trajectory.

Additionally, we optimize their mechanical design to minimize backlash, inertia, and vibration, which can affect accuracy during high-speed operation. The joints of swing-arm robots are designed with precision components such as bearings, gears, and drive systems to reduce friction and clearance and ensure smooth and accurate motion transmission. Their aluminum alloy allows them to reduce inertia and improve dynamic response, making the whole body lighter and consuming less power.


Swing arm robots have high precision in injection molding because of their sturdy structure, arm flexibility, and the integration of advanced control systems, which can play a crucial role in ensuring the quality, consistency, and efficiency of the injection molding process. Role.

Prev: What is the difference between an injection molding hopper dryer and a dehumidifier?

Next: Requirements for injection molding machines when injecting PET Preform injection molding



Get A Quick Quote