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.
Construct the pro forma cash flow statements for Bloomington Clinics for five years into the future using the data given in the case plus the most likely growth estimates. a. Wha
Apu powerplant installation: The APU engine mounts consist of a number of supports with vibration isolators fitted to the end of each support. The tubular supports are bolted
You are required to undertake the following tasks: 1. Problem Identification Download the dataset assigned to you from the module Blackboard site. Read the data description
The commonly used moulding materials for mould making can be broadly classified into the following two groups : (a) Metals : Including grey cast iron, steel and an
7 refer(s) to the ability to convert assets to cash quickly and at a fair market price and often increase(s) as one approaches the later stages of the investment life cycle
Illustrate the importance of communication in a retail business organisation?25 marks
Oil supply failure - Propeller: To prevent an overspeed caused by an oil supply failure, one of two methods may be employed: • Hydraulic lock valve The pitch lock mecha
Turbine Blade Clearance. Creep is term used to describe the continuous and permanent stretching of turbine blades due to high temperatures and centrifugal forces acting on the
It is recommended that if possible you should buy a copy of this book. It will prove useful for the new fourth year configurational aerodynamics module also. Blackwells bookshop ha
explain the fibre optic communication system with block diagram
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