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STEPPED CONE PULLEY

Ex. No :                                                                                Date :

STEPPED CONE PULLEY

Aim

To make the mould for the given stepped cone pulley.

Material required

• Moulding board
• Riser pin
• Moulding box
• Sprue pin
• Green sand
• Rammer
• Trowel 
• Lifter
• Riddle
• Draw spike
• Gate cutter
• Bellow
• Vent rod

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    Procedure

    1. Place the moulding board on a horizontal surface.
    2. A suitable core is prepared with the help of core box.
    3. The drag box is placed above the moulding board. Now the               pattern is kept at center of drag.
    4. Now parting sand in sprinkled before we keep pattern.
    5. Facing sand is sprinkled over the pattern to a depth of 5mm. then     green sand is filled over it.
    6. Proper ramming is done on the green sand to get a air tight               packing.
    7. Excess sand is removed by strike off bar.
    8. The drag box is inverted upside down.
    9. The cope box is placed over the drag box and locked.
    10. The riser pin sprue pin placed at right position and green sand is      filled over the pattern.
    11. Proper ramming is done on the green sand to get air tight                   packing with strike off bar leaving is done.
    12. Now riser pin and sprue pin get removed from the green sand           mould. The pattern is removed by draw spike tool.
    13. Gate is prepared using gate cutter and core is placed vertically         inside the cavity.
    14. The vent holes are made with vent rod and cope.

    Result



    Thus the mould is created for given stepped cone pulley.

    Questions
    1. Define Casting.
    2. Explain the core making process?
    3. What are pattern allowances?
    4. Describe the types of patterns.
    5. Explain the composition and properties of moulding sand?



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