Utilization of Plc Programming for Gravity Die Casting Automation

Under the present regime of globalization and liberalization, quality enhancement and cost reduction are two major steps to enhance productivity in major Industries. We focused on the very practical, safe, economical and rewarding strategies i.e. the application of LOW COST AUTOMATION. In Industry which uses of automation, a sequence is followed in the manufacturing of number of products of the same kind and thus chance for Automation. In our research we have achieved low cost automation through a Programmable Logic Controller (SIEMENS SIMANTIC S7300PLC with STEP7 software). It is used to replace the necessary sequential relay circuits for the control on the devices. In automated system, PLC is usually the central part of the control system. With execution of a program stored in program memory, PLC continuously monitors status of the system through signals from input devices (sensors). Based on the logic implemented in the program PLC determines which action is to be executed with output instruments Actuators). Depending on our requirement Pneumatic actuators, Solenoid valves and sensors are used to run the sequence. Flow control valves are used to regulate the flow of air pressure where ever necessary.