Poulos

     Introduction to the working principle of the pneumatic buffer circuit of the manipulator of the injection molding machine? The pneumatic buffer circuit of the manipulator of the injection molding machine is an important part of the manipulator, and its working principle is as follows.
(1) Deputy Z direction:
     Since the arm only takes the material of the lower mass nozzle, the load is small, so when driving the cylinder to move up and down, an exhaust throttle valve (E, D) with a muffler is used to adjust the manipulator of the injection molding machine to execute the movement of the cylinder. speed.
(2) Z direction main hand rising stroke:
     Since the robotic arm takes the plastic products and bears the main load, the pneumatic circuit that drives the cylinder by the up and down movement of the arm is specially designed. When the cylinder moves up, it has to overcome the gravity load of the arm, so the moving speed in the up direction is at The design is lower than the moving speed in the downward direction. The speed control method is the same as that of the Z-direction deputy, but also through an exhaust throttle valve (C) to adjust the control.
(3) Main hand descending stroke in Z direction:
     When the cylinder moves down, the movement speed is very high, coupled with the effect of the gravity inertia of the arm, it will produce strong vibration and shock at the end of the stroke. It is difficult to achieve good results if the same method as when going up is used. The speed is specifically controlled using the following methods.
     Two exhaust throttle valves (A, B) are used to form two sets of pneumatic circuits respectively. In one set of circuits, the opening of the exhaust throttle valve (B) is adjusted to a smaller position, so that the cylinder is in the beginning of the stroke and The end section is used to make the cylinder have greater exhaust resistance at the beginning and end sections, thus reducing the movement speed of the arm; In the other set of circuits, adjust the opening of the exhaust throttle valve (A) to a larger position for the cylinder to use in the middle section of the motion stroke. When the cylinder drives the arm to move down the initial section, it controls the 2-position 3-way of the circuit. The solenoid valve (F) is turned on. At this time, the exhaust of the cylinder is exhausted through the exhaust throttle valve (A) with a larger opening, so that the cylinder and the arm can move at a high speed. When entering the end section, 2 positions The 3-way solenoid valve (F) is disconnected again, and the cylinder returns to exhaust from the exhaust throttle valve (B) with a smaller opening degree. Adjust and observe until a satisfactory cushioning effect is achieved.