The hand of the specialized robotic arm for injection molding machines is used to directly grasp the components of injection molded products. Due to differences in the shape, size, weight, and surface characteristics of injection molded products, there are various forms of hands for injection molding robots, which can generally be divided into two types: clamping and adsorption. The main form of gripping hands is the clamp type, which is commonly used to grasp products that are not easily broken or deformed. It has great adaptability to the shape of the products being grasped. The gripper hand is composed of fingers, transmission mechanism, and driving device.
For gripper type hands, the main considerations for design selection are as follows:
(1) The hand should have adaptive clamping force and drive;
(2) Fingers should have sufficient switching range;
(3) Fingers should have a certain clamping accuracy on the product;
(4) The hands should have a certain adaptability to the product and should be able to withstand the high temperature and corrosiveness of the injection molded product when it is just taken out of the mold cavity.
driving system
The driving systems of injection molding robots can generally be divided into three types: hydraulic drive, pneumatic drive, and electric drive. They can also be combined according to work requirements to complete the drive.
When designing and selecting a drive system, the following points should be noted:
(1) The type of drive system is determined based on the load capacity of the robotic arm. Generally speaking, electric drive systems can be selected for heavy loads, and pneumatic drive systems can be selected for light loads.
(2) For injection molding robots with point control, pneumatic drive systems are often used.
(3) For robotic arms that require servo control, hydraulic or electric drive systems are often used.
control system
All actions of the injection molding robot are completed under the command of the control system, especially the coordination between the robot and the injection molding machine, which relies on the control system to achieve. Under the command of the control system, the robotic arm completes various actions according to the predetermined work program, thereby taking out the injection molded products from the mold and transporting them to the designated location or the next production process, and spraying release agent into the mold cavity. When designing, the control system should be determined based on the performance of the injection molding machine, the operating conditions and requirements of the robotic arm, the shape and weight of the product, etc. Generally speaking, the design or selection of control systems should follow the following key points:
(1) Ensure that the robotic arm has sufficient positioning accuracy;
(2) Attention should be paid to the coordination and coordination of the actions of the robotic arm and the injection molding machine to ensure that after the robotic arm grabs the product and leaves the mold, the injection molding machine and the robotic arm can continue to move independently, thereby reducing time waste;
(3) Attention should be paid to controlling the operating speed of the robotic arm, that is, to ensure that it can meet the requirements of the shortest injection molding cycle, and to consider whether inertial impact and vibration will occur;
(4) The balance between the cost of the control system and the actual work requirements should be considered.
Related search: Dongguan Conveyor Belt Oblique Arm Robot Dongguan Robot Accessories Horizontal Walking Robot