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.
We will need to use several different flow models as we go along. It is crucial to understand the simplifications used to obtain these models because these limit the validity of th
program how to estimate the inner curve using spline interpolation
explain easily
Casting Alloys are - (i) Permanent moulds are commonly used for the casting of grey iron, aluminum alloys and magnesium alloys. (ii) Slush Casting
Ask question #Minimum 1100 words accepted#
COMPARISON OF 2-STROKE AND 4-STROKE ENGINES: Two-stroke engine possesses the following advantages over the four stroke type: 1. Because of its valueless construction, the
Company: British Sky Broadcasting Topic: You are a security analyst in a large investment house and must write a report on a real stock of your choice, giving a buy, hold or sell r
program to work as xor gate
Design the counters for the digital clock Minimum 100 words accepted#
. An engineering department chair wants to maximize the use of scholarship dollars to shape the enrollment of the incoming freshmen. All applicants take an engineering aptitude t
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