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Automatic pneumatic ramming machine
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Project Zone > Mechanical > Hydraulics And Pneumatics

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Automatic pneumatic ramming machine

Category : Hydraulics And Pneumatics


Sub Category : Industry


Project Code : ITMH14


Project Abstract

Moulding is one of the important metals forming process in manufacturing components for various applications in industry. Casting of any size and shape can be made accurately. Automation in this field helps to improve the foundry environment and accuracy of the cast parts. Efficiency of moulding is affected by various parameters like permeability, collapsibility, adhesiveness etc. So it is a must to avoid defects in casting. The defects occur in sand castings post a great problem in foundry. On account of defects more than 10% castings are rejected. Even though skilled labour is employed for ramming operation, the packing of moulding sand will not be even throughout the moulding box. So we have selected the idea of fabricating “PNEUMATIC RAMMER”. This rammer is operated pneumatically. By using this rammer moulding sand will be packed evenly throughout the box.

Working principle:

 

The compressed air goes to the flow control valve. The flow control valve is used to control the flow of air. It is adjustable one. We have to adjust the lever, so that the required pressurized air goes to the Solenoid Valve. In our project, the solenoid valve is used as a Direction control valve. This solenoid valve is controlled by the electronic control timing unit. The ramming time is varied by adjusting the timing (timer 555 IC) control of the electronic unit. The compressed air goes to the pneumatic double acting cylinder. The ram is fixed at one end of the pneumatic cylinder. The compressed air pushes the pneumatic cylinder, so that the piston moves downward by giving air supply in one direction of pneumatic cylinder. The solenoid valve is changing the air flow in the opposite direction by the small Time delay. In this time the pneumatic cylinder piston Moves upward due to changing of the air flow direction. This air flow direction is controlled by the solenoid valve.
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