Published in: Physics
6,205 views
• Akshay S

• 1 Years of Experience
• Qualification: BE
• Teaches: Physics, Mathematics, Production, Mechanical, Draw...
• Contact this tutor

Different Methods to design Riser in casting is discussed. It is very important for GATE mechanical exam.

• 1
Riser Design (Casting) Definition: Riser is defined as a reservoir for supplying molten metal to the casting cavity to compensate (additional molten metal) the liquid shrinkages taking place due to solidification. Shape of riser: It's shape is almost cylindrical since it takes more time to solidify than sphere and cube shape. Conditions for designing riser; Volume of riser (Vr) = 3 x Shrinkage Volume of casting (Vsc) (Necessary) Solidification time for riser (TO 2 Solidification time for Casting (csc) (Sufficient) Position of riser: Top cylindrical riser Side Cylindrical riser Diameter (D) = 2 x Height (H) Top Riser Diameter (D) = Height (H) D Side Riser
• 2
Terms Related to riser design; Volume of Casting/riser Module (M) = Surface area of Casting/ riser Solidification time (T) = k M2, k ā Mold Constant Surface area includes all surfaces of any shape which transfers heat during solidification of Note: casting Methods of Riser Design: Method Caines Method Modulus Method Novel Research Method Shrinkage Volume Consideration Method Equations Modulus of riser (MT) Freezing Ratio, X = Modulus of casting (MC) Also c y-b a, b, c are constant Volume of riser y= volumetric ratio = Volume of casting Modulus of riser (MO = 1.2 x Modulus of casting (MC) Shape factor = 1=-2 Lā Length of casting w ā width of casting t ā thickness of casting According to shape factor riser dimensions are decided Volume of riser (Vr) x Volume of 100 Casting (Vc) a=% shrinkage of metal during solidification

Need a Tutor or Coaching Class?

Post an enquiry and get instant responses from qualified and experienced tutors.

Post Requirement

Physics
1,284 views

Physics
14,697 views

Physics
660 views

Physics
533 views

Physics
817 views

Physics
455 views

Physics
557 views

Physics
3,225 views

Physics
710 views

Physics
288 views

Drop Us a Query