SIEVE SHAKER IN SAND TESTING

   Sieve shaker of Molding Sand.

Description

Timer and switch are provided on the panel. The instrument consists of 10 sieves, lid, and pan. The sidebar on the shaking mechanism are made specially to accommodate 10 number of sieves

Presetting

Fix the instrument on a strong and sturdy base which can withstand the vibration of the instrument during shaking label the instrument by leveling knobs.

Remove the clamping device by pulling the knobs of side flexible bar. Take out the set of sieves. Check the timer and switch for OFF position. Connect the single phase A.C supply.

Operating Instruction

Use a soft brush for cleaning sieves and pan. Arrange a set of sieves having the pan at the bottom and the coarsest sieve on top.

Take 100 gms of dried and washed. Put the lid.

Keep entire sieves set on shaking mechanism. Slide the clamping device on two side flexible bars and clamp the set of sieves with the help of knurled screws provided. Set the timer for desired sieving time (Average time of the cycles is recommended as 10 min.).

 Put “ON” the switch. After completing preset timing the sieving will stop automatically.

Disconnect the supply. Remove the clamping device. Weight the grains remaining on the indusial sieves.

It is recommended to weight each empty sieve before the test and again after the test along with sand the sand, the difference between two will give an accurate weight of grains

Learn also: Foundry meaning in Hindi

Is sieve operation number in Micron?	Weight in gms. On Sieves	% Retained =b	Multiplying factor	Product
A	B	C	D	E =C X D
1700			5
850			10
600			20
425			30
300			40
212			50
150			70
106			100
75			140
53			200
Sieve Pan			300

Methods for fineness number:-

Formula

                                            E                     Total of E

Fineness number =   _________      =     ___________

                                             C                    Total of C

The percentage of the retained grains on each sieve and the pan is two be multiplied with the multiplier and the results are to be added. This sum is divided by the total of percentage retained sand grains.

Precaution:-

·         Keep the instrument clean and tidy.

·         Remove sand grains from each sieves using a soft brush.

·         Before tighten the knob ensure the sieves are fitted exactly into each other.

·         Do not rotate the timer knob in an anti-clockwise direction.