Explain system and parting sand, Mechanical Engineering

Assignment Help:

Q. Explain System and Parting sand?

System Sand: In mechanized foundries, where machine moulding is employed a so called "system sand" is used to fill the whole flask. Since the whole mould is made up of this system sand, the strength, the permeability and refractoriness of the sand must be higher than that of backing sand.

Parting sand: This sand is used to prevent adhering of two halves of mould surfaces in each moulding box when they are separated. Thus, to ensure good parting, the mould surface(at contact of cope and Drag)should be treated with parting sand or some other parting material. It is also sprinkled or applied on the pattern surface (before the moulding sand is put over it)to avoid its sticking and permit its easy Withdrawal from the mould. The parting sand is fine dry sand. There is other parting material also used in foundry.


Related Discussions:- Explain system and parting sand

Theory of machine, Kleines contruction for slider mechanism

Kleines contruction for slider mechanism

Thin cells, what type of stresses a thin cell is subjected to?

what type of stresses a thin cell is subjected to?

Determine the maximum allowable tensile strength, 1. The linkage system bel...

1. The linkage system below consists of two bars A & B plus 4 linkages. Each linkage has a square cross section. The allowable tensile strength of all members is 200 MPa, the allow

Show the support locations for truckable skid, Q. Show the support location...

Q. Show the support locations for truckable skid? Unless instructed otherwise by Engineer, support locations for truckable skid shall be determined by skid Vendor. Support loca

Limitations of carnot vapour cycle, Limitations of Carnot vapour cycle: ...

Limitations of Carnot vapour cycle: This equation dignifies that the wider the temperature range, the more efficient is the cycle. ( a )T 3 : In practice T 3 cannot be r

Determine the diameter of wire - close coiled helical spring, Determine the...

Determine the diameter of wire - close coiled helical spring: A close coiled helical spring has to absorb 100 N-m of energy while compressed to 10 cm. The coil diameter is 10

How can we use of shrinkage allowance, Q. How can we use of Shrinkage allow...

Q. How can we use of Shrinkage allowance? Since metal shrinks on solidification and contracts further on cooling to room temperature, linear dimensions of the pattern is increa

Determine the stability of the closed loop system, Determine the stability ...

Determine the stability of the closed loop system whose open loop transfer function is Use the Nyquist criterion

Formation - permanent way, Formation (Embankment): The formation is t...

Formation (Embankment): The formation is the earthen embankment on which the other components of the track rest. For supporting the heavy loads, the earth should be of good q

Dynamic analysis., dynamic analysis of four bar linkage by kelin''s constru...

dynamic analysis of four bar linkage by kelin''s construction.

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