Classifications of moulding sands, Other Engineering

             1. Generally moulding sands can be classified as:

          (a) Natural Sand

          (b) Synthetic or High Silica Sand

          (c) Chemically Coated Sand

          2. According to amount of clay, moulding sand can be classified as :

          (a) Silica Sand                                    - up to 2% clay

          (b) Lean or Weak Sand                      - 2 to 10% clay

          (c) Moderately Strong Sand               -10 to 20% clay

          (d) Strong Sand                                  - up to 30% clay

          (e) Extra Strong Sand(Loam Sand)    - up to 50% clay

          3. Other type of Moulding Sands

          (a) Green Sand or tempered Sand : It is a mixture of silica sand, 18-30%  

                clay and 6-8% water. It is fine, soft, light and porous.

          (b) Dry Sand : Green sand that has been dried or baked after the mould is made is known as dry sand. It is suitable for larger castings.

          (c) Loam Sand : It is high in clay up to 50% or more.

          (d) Facing Sand : It creates the face of the mould. It comes into contact with the molten metal when the metal is poured.

          (e) Backing Sand or Floor Sand : It is used to back up the facing sand and to fill the whole volume of the flask.

           (f) System Sand : It is used to fill the whole flask.

           (g) Parting Sand : It is used to keep the green sand from sticking to the Pattern and also to allow the send on the parting surface of the cope and drag to separate without clinging.

           (h) Core Sand or Oil Sand : It is utilized for building cores.

Posted Date: 8/3/2012 1:59:01 AM | Location : United States

Related Discussions:- Classifications of moulding sands, Assignment Help, Ask Question on Classifications of moulding sands, Get Answer, Expert's Help, Classifications of moulding sands Discussions

Write discussion on Classifications of moulding sands
Your posts are moderated
Related Questions
Question: (a) A mobile operator wants to weigh and allocate cost towards mobile broadband subscribers with mobile broadband at 80% of the traffic and 15% of the subscribers. H

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

how to identify the capital structure of the company?

In this assignment you are asked to demonstrate your understanding of both exploratory and statistical inference techniques described in class to investigate how the currency marke

Bravis lattice or Bravis crystal system: The ideas of space lattice was introduced by Bravis in 1990.According to this there are 14 possible types of space lattices in the seven ba

"Whether you are writing, listening, speaking, or attending meetings, communication skills are critical to your success in University and the workplace". Discuss. Since entering

The purpose of this project is to design a pipeline and pumping system to dewater a mine. The production level is 500m below surface. Ore is fed through crusher chambers to the tra

please explain a bout blog diagram of flame photometer

how thermoelecteric thermometer is contructed and how it working

The operation of heating a green compact to an elevated temperature is known as sintering. It is a process by which solid bodies are bonded by atomic forces. It is carried out belo