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This machine is based on Weight less Zone or Fluidized Zone mixing technology with many modifications at Lark Engg. Co. (India). In this machine, two shafts are positioned in a double drum housing on which series of blades (generally 14 on each shaft) are fixed. The two shafts rotate at a specific peripheral speed in opposite direction while paddles on each shaft overlap in the middle of mixer.

This lift all the ingredients in the middle and creates fluidized zone by neutralizing gravitational forces working on particles of different ingredients having different shapes, sizes & density. Hence, a very homogeneous product is received. The next step is to discharge the highly homogenized material from the mixer without segregation. For this, material is discharged very quickly with the help of two pneumatically operated large bottom discharge doors.
Filling level
Filling level is another feature of this mixer, as it can work equally well with 40% overfilling and 60% under filling of its nominal filling level. Nominal filling level is the level upto the shaft of the mixer.
For liquid addition, material should be filled at least 120% level when pin-mill or FDB is used.
liquid Addition
The provision of single shaft with rotating pins positioned at the fluidized zone of the mixer is called Flow Distortion bar. The Flow Distortion Bar creates curtains of particles to which the liquid can be sprayed by providing a spray bar with nozzle arrangement. The dry materials encase the liquid droplets so that liquid can not be smear up inside of the mixer.
pin mill system
The pin mill system provision in fluidized zone of mixer consists of two counter rotating shaft with pins. When both the shafts are counter rotating through the fixed pins welded on the shroud on the top, they create the required shear force to break the soft lumps. Please note that to effectively use the Pin Mill system, you require to have 20% over filling of normal batch capacity.
Our Double Shaft Paddle Mixer has following strong points
Mixing Quality
Homogeneous mixing of different ingredients irrespective of density, shape and size of ingredients in shortest time (CV< 5% is easily achievable within 30 Sec. to 180 sec).

Due to large particle movement in Fluidized Zone and a relatively low speed counter rotating shafts very low friction and shear forces are generated, hence heating as well as mechanical abrasion on product is greatly avoided which make it suitable for even for fragile products.
Economy of Mixing
Power consumption per ton of the product mixed is very low. Similarly with negligible wear and tear, maintenance and running cost is also very low.
As the mixer is discharged quickly so segregation is avoided and there is minimum of residue in mixer.
Due to large access doors, cleaning is easy.
Geared motor with chain drive for smooth running
Effective shaft sealing system Geared motor drive
Material of construction
Material of construction may be Stainless steel (AISI 304, AISI 316, etc.) or standard and special carbon steel to suit specific requirements.
Technical Specifications & Dimensions
Batch Capacity
Power in H.P
Ltr Cu.ft A B C D E
    DSPM -60
900 690 980 580 650
    DSPM -120
1110 850 1210 730 950
    DSPM -150
1220 960 1260 790 980
    DSPM -200
1350 1050 1350 840 980
    DSPM -350 350 12.4 7.5 1650 1240 1500 995 1150
    DSPM -500 500 17.7 10 1750 1370 1640 1150 1180
    DSPM -750 750 26.5 15 1950 850 1860 1300 1500
    DSPM -1000 1000 35.3 20 2200 900 2060 1450 1560
    DSPM -1600 1600 56.0 30 2550 1030 2400 1650 1750
    DSPM -2000 2000 70.0 40 2850 1150 2600 1890 2100
Note: The givem batch capacity is for normal filling upto shaft level. This machine can work on 40% over filling and 60% under filling of normal filling level.
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