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Sensor operated ramming machine
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Project Zone > Mechanical > Automation And Mechatronics

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Sensor operated ramming machine

Category : Automation And Mechatronics


Sub Category : Industry


Project Code : ITMM11


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.  Due to improper ramming the following defects may occur in castings. BLOW HOLES (Due to very hard ramming), SCAB (Due to uneven ramming of sand), SWELL (Due to very soft ramming), METAL PENETRATION (Due to soft ramming), HOT TEAR (Due to hard ramming), INCLUSIONS (Due to soft ramming), DROPS (Due to soft ramming) .Even though skilled labour is employed for ramming operation, the packing of moulding sand will not be even throughout the moulding box. Sensors are used to power saving system. The female die is kept on the work table, the ramming machine works automatically by using sensors. So we have selected the idea of fabricating “SENSOR OPERATED AUTOMATIC RAMMING MACHINE”. This rammer is operated pneumatically. By using this rammer moulding sand will be packed evenly throughout the box.

WORKING PRINCIPLE

                The Sensor Operated Automatic rammer is used for ramming the sand uniformly around the pattern.  It can be used even in small scale industries. To operate this rammer an air compressor is needed.  A butt which is attached to the bottom of the piston rod does the operation of ramming.  The pressure developed inside the cylinder reciprocates the piston and hence the butt. This rammer is handled by an operator just by moving it over the moulding sand.  The butt rams the sand at places moved and the sand is uniformly rammed. This rammer reduces the ramming time and labor.  Due to this the cost is reduced considerably.  So this machine finds application in foundries
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