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.
a part of machine has a reciprocating motion which is simple harmonic making 200 complete oscillations in a minute.the part weight 45 N.determine the accelerating force upon it
Financial Management, Finance This case has been framed in order to test the skills in evaluating a credit request and reaching a correct decision. Perluence International is large
shafts
Inspection of casting Visual inspection Inspection for dimensional accuracy. Sound test Pressure test Impact te
easy defination of zener diode nd its application and characteristics ?
How do you draw in othographics
Pls solve the problem 13-7 in Statistical Quality control by Montgomery
Need to understand the method for calculating the maximum deflection and maximum stresses on a rigidly supported circular plate. The plate has a 500 mm radius and is 12mm thick.
State-estimators for continuous time linear systems The state space state and output equations of continuous time linear systems is of the form? x = Ax + Bu + v and y
i need assignment on this topic
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