Design and Development of All Electric Injection Moulding Machine

Abstract

All electric Injection moulding machines were developed to use electromechanical ac- tuators to eliminate uid power (hydraulic pumps, control valves and actuators) from the machine. This new technology holds the promise to reduce energy consumption, improve control and increase productivity over the conventional hydraulic technology. In recent days, the electric injection moulding machine is in the spotlight in heavy size injection moulding machine market, which has been dominated by the hydraulic moulding machine, due to its high precision in position control and at the same time can increase clamping force by proper design of the toggle link system. Thesis represents design and development of all electric injection moulding machine in which the hydraulic technology of injection moulding machine (180 ton capacity) has been designed to replace by all electric technology. All electric injection mould- ing machine consists of three units Clamping unit , Injection unit and Base Frame. Clamping unit is redesigned by kinematic synthesis of toggle mechanism with the help of Design view software to suit All electric technology (ball screws producing the linear motion with the help of powerful AC servomotors). Motor selection and ball screw selection has been done on the basis of torque calculation, required to drive the ball screw. A new concept of ejector mechanism to eject the nished product has been developed. Study of existing base frame of the hydraulic machine has been done and is redesigned on the basis of weight optimization and aesthetics. Redesign and modeling is done with the help of CAD software CREO 5.0 and the same is validated with the help of FEA using CAE software ANSYS workbench 13.0.