It really depends on the kind of casting and the kind of moulding process deployed. for High pressure moulding it might be 3.6-4.0%, for jolt squeeze about 4.0 to 4.5%. For hand moulding it depends.
Control the water content in it......if it is low, spray water in small amounts and if it is high dry the sand (can accelerate the process using blowers)
Permeability number formula should be multiplied by 60 for time in secs ?
Time to find permeability no should be used in minutes to get correct answer.
There are fully automatic equipment doing this now a days.
Could you help to share why some people mix the sands with molasses or engine oils and can you tell me what’s called that equipments please
Sir. How to prepare naoh solution. Kindly explain. Thank you.
Sir ,from loi reports to gcs calculation method formula I want to know...
Pls help sir...,
If u watcing this text pls reply me sir...
Please tell required moulding sand properties for all test for cast iron.
It really depends on the kind of casting and the kind of moulding process deployed. for High pressure moulding it might be 3.6-4.0%, for jolt squeeze about 4.0 to 4.5%. For hand moulding it depends.
Can we use this for gate lectures?
Yes. Definitely.
How 200.5 is coming permeability no???? Check calculation, it's coming 3.004.
Thank you sir,
here you are not explained about return sand and sand temperature.
How to download ppt
Sand dry aane ki wajah se water badana padta hai then water badane se moisture increase hota hai wo use control kaise kre sir
Return sand moisutre (if you are using a sand plant) needs to be between 1.6-1.9%
I saw Sayan bg...
I saw Sayan l.l
Moisture ki control kaise kare sir
Control the water content in it......if it is low, spray water in small amounts and if it is high dry the sand (can accelerate the process using blowers)
Where?
@@abhijeetbisen7345
Could you help to share why some people mix the sands with molasses or engine oils please ?
@@ziadnajm1118
Molasses:
1. Acts as a binder, holding the sand grains together.
2. Helps create a stronger, more durable mold.
3. Reduces mold erosion during pouring.
Engine Oil:
1. Improves mold release properties (eases removal of cast part).
2. Reduces friction between mold and cast metal.
3. Helps prevent mold sticking.
@@abhijeetbisen7345 so Which type is better 1-water
2-molasses
3- engine oils ?