Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
A riser or a feeder head is a passage of sand made in the cope to permit the molten metal to rise above the highest point in the casting after the mould cavity is filled up. Risers serve a dual function. They compensate for solidification shrinkage which is a very common casting defect and are a heaf source so that they freeze last and promote directional solidification.
Types of Risers : There are two types risers :Top or open risers and side or blind risers.
Riser shape and Size : The metal in the riser should remain in the molten state for a longer time than in the mould cavity.
It means a heaf looses in riser should therefore be kept to a minimum. It means a riser most freeze more slowly than the casting. Those there shape should be such as to give volume-to-surface-area ratio a maximum value. This ratio is maximum for a sphere. Therefore this is the ideal shape of a riser.
As regards the height of the riser, it must be fall enough to ensure that any pipe formed in it does not penetrate the casting.
how to design SME networking
If radial velocity is neglected, for a stat or there is no change from the cascade analysis. For a rotor this vectorial For a rotor this vectorial addition gives rise to graphical
Aircraft maintenance engineering
Torsional Divergence Lets first try to explain and interpret torsional divergence for the aerofoil structural model physically. An additional figure describing the mechanical s
merits of laser light curtains in terms of cost,ease-of-use,flexibility.
3. Design and draw a circuit using the cascade system to operate two cylinders (A and B) which, on the operation of a start valve, produces the sequence A – B + B – A+. The cylinde
Q. What is the purpose of : (i) Sizing, (ii) Coining operations in powder metallurgy, (iii) Infiltration, (iv) Impregnati
Q. Explain the compositional defects. Ans. Compositional Defect: This defect due to (a) Alloying an element to original crystal. (b) Impuring atom during origi
Suppose you are managing a software-development project for which reliability is a major concern. A continual stream of anomalies is discovered in the software during the testing p
how would you judge the potential profits of Bajaj electronics on the first year of sales to booth plastics and give your views to increase the profit?
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd