Screens

Circular motion screens

TYPE : CMS

Circular motion screen has two Fabricated Side frames made of mild steel duly stiffened adequately and bolted to deck frame on which screening mesh rests . Depending up on the type of screening cloth/ plate their bolting & side crimping is used. These screens are run by V- Belts & Pulleys or Cordon shaft coupled to Electric Motor of appropriate Kw. and RPM. Screen shaft is passed through the C.G of the screen and unbalance weights are mounted on shaft to provide desired amplitude to the screen . These unbalance weights are adjustable and can be increased or decreased according to requirement . Complete screen rest on adequate numbers of springs housed in mounting brackets bolted to screen side frames . Quantity & Size of the Springs are designed to suit the screen size and duty conditions. When Motor is run , circular motion of the motor is transmitted by help of V-Belts and pulleys or cardon shaft to screen shaft . Unbalance weights on the shaft provides the stroke to the screen which is double the amplitude.

The Circular Motion Screens are Single , Double or Triple deck structure with a substantially rigid design. The screen body consists of the two side plates with bolted transverse supports and screen mounts. The screen box is based on an open design.

The vibrating screen is supported above the substructure by means of helical coil compression springs. The screen installation angle can be varied to suit the application.

The Drive shaft with its eccentric weights runs in heavy Screen duty self-aligning roller bearings. The throw of the vibrating screen is changed by adjusting the eccentric weights. The drive is either direct or through cardon shaft and v-belts.

There are several options for lubrication, oil or grease, which can be used without modification. Selected bearing seals ensure a long service life.

Applications:

With single or multiple screen decks.

  • Coal, Coke, Pet Coke, Lignite, Limestone, Dolomite
  • Minerals, Ores, Pellets, Sinter
  • Sand and Gravel, building materials
  • Chemical Products, Fertilizers

Linear motion screens

TYPE : LMS

Linear Motion Screens are operated either by a mechanical exciter or two unbalance motors. In both cases rotation in opposite directions creates linear vibration. Linear motion screens are very high performance machines, in terms of capacity and efficiency. They have a low inclination which varies between 0 degree and 15 degree due to this low inclination required head room height too becomes low. The drive is a combination of high amplitude and low frequency of vibration.

The Linear Motion Screens are bolted Single , Double or Triple deck structure with a substantially rigid design. The screen body consists of the two side plates with bolted transverse supports and screen mounts. The screen box is based on an open design.

The vibrating screen is supported above the substructure by means of helical coil compression springs. The screen installation angle can be varied to suit the application.

The drive is through direct force exciter and Cardon shaft. The angle of throw is determined by the construction and application but usually 35 to 60 degree. The counterweights can be adjusted in stages from 50 to 100%. for variation of amplitude.

There are several options for lubrication, oil or grease, which can be used without modification. Selected bearing seals ensure a long service life.

Applications:

With single or multiple screen decks

  • Coal, Coke, Pet Coke, Lignite, Limestone, Dolomite.
  • Minerals, Ores, Pellets, Sinter
  • Sand and Gravel, building materials
  • Chemical Products, Fertilizers
  • Compost, Refuse, Refuse Slags

Flip flow screens

TYPE : FLS

Flow Screen are used for separation of small cut size with good amount of moisture content which needs very high G force ( about 50 to 60 times G) for good separation and efficiency more than 90 % consistently.

Flip Flow Vibrating Screen is used to separate fines with high moisture and sticky nature where the circular motion conventional mechanical vibrating screen becomes inadequate to cater the requirement. Damp and sticky materials are blinding over the apertures of the screen panel causing choking of the material on screen deck.

Flip Screens are best suitable machines for separation of fines i.e particle size to be separated less then 15mm with high moisture content. The characteristic feature of Flip Flow Screen machines are two screen cases, one encased and the other which are counter currently oscillated by eccentric shaft. The screening takes place on permanently elastic highly wear resistant Polyurethane panels . Due to the counter motion of the screen, the screen panels are alternately, de-tensioned and tensioned in a defined manner about 600 times per minute which is 20 times higher than those of conventional screening machines Moreover , the elastic screen panel is not only tensioned but additionally stretched up to 10mm Hence the shape of the aperture is slightly changed and pegging of apertures by near size particles is prevented. .

This leads to the characteristic, trampoline – like motion of the screening element. The screen normally works under acceleration force of about 50 g to prevent any type of clogging as against conventional screen which works at acceleration value of about 4 to 5 g.

The construction of Flip-Flow Screen consists of two cases. The outer case and Inner case. The outer screen frame is suspended from the inner frame by guide springs, permitting horizontal movement. The inner frame is supported on the wedge shaped jack by means of Rubber insulating springs.

The cross beams supported the polyurethane mats are alternatively connected to the inner and outer cross beams. The whole systems are counter currently oscillated by the eccentric shaft.

The drive box of screen consists of eccentric shaft with a pair of eccentric bearing. The circular motion of the drive shaft is transformed into oscillation of the screen frame by means of thrust rod springs.

Helical springs are arranged between the inner screen frame and the support jack thus ensuring that the machine is kept in the correct position according to the angle of inclination. The screen should have fixed cover on top to prevent dust. The screen should have provision of removal of individual sections of the cover to give easy access for easy maintenance.

Applications:
  • Coal, Coke, Pet Coke, Lignite, Limestone, Dolomite
  • Minerals, Ores, Pellets, Sinter
  • Sand and Gravel, building materials
  • Chemical Products, Fertilizers
  • Compost, Refuse, Refuse Slags

Grizzly screen/feeder for coarse screening

  • Grizzly screens/Feeder are usually employed to extract coarse material from storage hoppers and convey it to downstream crushers. They are used for screening smaller grain size in the feed material which does not require crushing. Grizzly screens/Feeder are specially designed for such application.
  • The Grizzly Screens/Feeder are Liner Motion & of bolted structure with a highly rigid design. The screen body consists of the two side plates with bolted transverse supports and screen mounts. The screen box is based on an open design.
  • The Grizzly screen is supported above the substructure by means of helical coil compression springs. The screen installation angle can be varied to suit the application.
  • The drive is through direct force exciter and Cardon shaft. The angle of throw is determined by the construction and application but usually 35 to 60 degree. The counterweights can be adjusted in stages from 50 to 100%. for variation of amplitude.
  • There are several options for lubrication, oil or grease, which can be used without modification. Selected bearing seals ensure a long service life.
Applications:
  • Coal, Coke, Pet Coke, Lignite, Limestone, Dolomite
  • Minerals, Ores, Pellets, Sinter
  • Sand and Gravel, building materials

For Sizing and selection by our experienced engineering staff & to recommend the installation best suited to specific applications, answers to as many of the following questions as possible will result in a prompt and accurate solution to your screening requirements.

  • Material to be screened
  • Maximum feed dimension
  • Approximate feed size analysis
  • Moisture content
  • Stickiness
  • Bulk Density
  • Separation sizes required
  • Friability
  • Abrasive characteristics
  • Do you intend close circuit operation?
  • Capacity desired in tons per hour