Riser design, Other Engineering

Assignment Help:

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.


Related Discussions:- Riser design

[email protected], First page rankings on Google We can put...

First page rankings on Google We can put your website on 1st page of Google to drive relevant traffic to your site. Let us know if you would be interested in getting detailed prop

Spot welding, In spot welding, the parts to be joined are normally over lap...

In spot welding, the parts to be joined are normally over lapped. The work piece are clamped between two water cooled copper electrodes. On the passage of a high transient current,

Archimedes Screw, How to I make my archimedes screw work?

How to I make my archimedes screw work?

What is accounting management?, What is accounting management? Managemen...

What is accounting management? Management accounting is worried with offering details to supervisors - that is, individuals within a company who immediate and control its functi

Detection and removal of shadow from an image, plz give an exact method for...

plz give an exact method for the detection and removal of shadow from an image

Extrusion, Extrusion : In this method of forging, the metal slug is forced...

Extrusion : In this method of forging, the metal slug is forced to pass through a die under the action of intense of hydraulic pressure. The process can be viewed as squeezing the

Function setxor and set function unique - set operations, Function setxor a...

Function setxor and set function unique: The function setxor receives two vectors as input arguments, and returns a vector having all the values from the two vectors which are

Probability, Suggest an example of a decision from your own experience whic...

Suggest an example of a decision from your own experience which you feel is best treated as a decision without probabilities. What principle of choice would seem appropriate?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd