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
Assignment: You are interested in proposing a new venture to the management of your company. Pertinent financial information is given below. BALANCE SHEET Cash 2,000,000 Accounts

why we need EJB

The module content and teaching style has undergone revision since 2006-07. There are two reasons for this. First, this was the first year that Prof Badcock was responsible for the

Question: (a) Explain the three types of cyclic repetition blocks in DAB or DVB broadcasting. (b) DAB and DVB use stream and packet modes whereas MBMS uses broadcast and mu

Write short notes on the overcoming the following obstucal with good leblel diagram 1 RIVER 2.BUILDING 3.DAM

Advantages of hot extrusion


What are the disadvantages of Image Orthicon Camera tube

Industries that manufacture racing cars prefers nickel based alloys for engine components and iron based alloys for structural parts. Justify this statement.

Fire alarm systems: All buildings require a means by which the warning  of  fire  can  be  given  to  all occupants.  In the very smallest premises this might be achievable by