MANUFACTURING PROCESS || Unit - 1 || PATTERN ALLOWANCES

#manufacturingprocess #polytechnic
PATTERN:
Pattern is the model of the required casting made in wood, metal, plastic, etc
It is used to produce the mould cavity in sand .
Types of Patterns :
Solid pattern
Split pattern
Loose piece pattern
Match plate pattern
Sweep pattern
Skeleton pattern
Segmental pattern
Shell pattern
PATTERN ALLOWANCES :
Patterns are not made to the correct sizes of the castings. Patterns are made slightly larger than the required castings. This extra sizes given on the pattern is called pattern allowance.
Pattern allowances are given for the purpose of compensating the metal shrinkage, to provide extra metal for machining, to avoid metal distortion, for easy withdrawal of pattern from mould and for rapping.
If allowances are not given on the pattern, the castings will become smaller (ie) undersize.
The various types of pattern allowances are:
Shrinkage allowance
Machining or finish allowance
Draft allowance
Distortion or camber allowance
Rapping allowance
This types of pattern allowances are explained in this video briefly.
#manufacturingprocess #polytechnic #patternallowance

[@subramanis8126]

சிறு குழந்தைகளுக்கு கற்றுத்தருவது போல், உங்கள் வகுப்பு இருந்தது

[@OnlyOfficialCom]

Unbelievable...spr bro congratulation 😍😘

[@neeru8381]

vera level anna
mt full ah podunga

[@srinath1761]

Hi bro mt-1 full chapter podunga bro,you explain very clearly bro.

[@vickytutelage6648]

Thank you, As soon as possible

[@meetsathish2205]

Innovative! Keep it up❤

[@John-Tony26]

Best video in allowance in casting
Thank you sir🙏

[@046madhavanl6]

Good explanation..but why didn't increase the counting of views?

[@kamalcreation8451]

Super Bro

[@ragulragul3541]

Very clear explanation..Tq sir❤

[@Ashura32186]

Tq sir its still awesome 😊😊

[@manjulabalu6036]

Thanks you sir

[@ganeshk7010]

Bro PDF format la notes kedaikkuma...

[@aswinth1854]

Thanks ❤

[@sanalc3629]

Thanks

[@ttffbeast4811]

Bro please bro continue va video podunga

[@meme.z_12]

Sir anna university , 2021 regulation , sem 3 , mechanical engineering subjects podunga please

[@All_in_one_official_07]

Good

[@vickytutelage6648]

Thank you

[@selvasanthosh2536]

Nalla Ella bro

[@rohinirohini3137]

Pattern maker mind ku tha puriyum ne yellam nalla Ella nu tha solluva yeana unakku pattern maker mind illa ..ne comments pannatha...ok

[@ttffbeast4811]

Super

[@ttffbeast4811]

@@rohinirohini3137 super

[@ttffbeast4811]

Dai poda mind illa dha bottu