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.
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.
Composites have low shear strengths compared to longitudinal strengths. The ILSS test is a simple 3 point bend test, requiring a small amount of material. A span to depth ratio
Lift and drag are merely the resolved components in specific directions of a resultant aerodynamic force caused by the relative velocity V of the vehicle through the air. If al
Consider 1:1 stoichiometric polymerisation of 1,4-diaminobutane with sebacoyl chloride. (a) Write down a balanced chemical equation for the polymerization (b) Name the polymer fo
Limiting travel distances - Means of Escape: Some buildings, or parts of buildings, do not have alternative exits and do not have protected escape routes leading to a place of
Q. Explain various stages of creep? Ans. CREEP: Creep can be defined as the process by which plastic flow occurs when a constant stress or load is applied to a material for a
Define Demat Account? What is the use of it? Demat indicates Dematerialization of reveal, in easy it is an consideration with which a individual can business in protection indus
In Corporate finance, Experts engaged in this occupation have the liability to increase the organization's revenue, shareholder's money, investment spending budget and determining
Climbing Drum Peel Test The CDP test works by attaching a free end of a face sheet of a sandwich panel to a drum which then rolls across the panel, peeling off the face sheet. A
Give two functions of dimensions.
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