1xxx 3xxx 8xxx Aluminum Sheet Continuous Rolling Mill 720×1450mm

Aluminum Sheet Contiuous Casting Rolling Mill Φ720×1450mm

• From molten aluminum holding furnace outlet, automatic control aluminum liquid level, refine the liquid further in degassing box, filter, front box mouth, cast rolling rollers of opposite rotating and inside cooling in circulation, aluminum liquid crystallize within certain deformation to become 6-8mm thickness aluminum sheet from molten aluminum or aluminum alloy liquid. Then cut the sheet head and rewind to be aluminum coil.
• The axial line of the cast rolling mill is 15° inclined to vertical line, this is good for conquering metal segregation and surface tension of metal oxide film.
• The stable liquid level between smelting furnace and cast mill is very important. A flow controller at furnace port can adjust and keep constant flow. The aluminum alloy liquid must be continuous and clean in same chemical composition, the degassing device refine the liquid and then liquid flows into front box of cast mill after filtering. Titanium wire feeder sends max two pcs AlTiB wire to launder system at preset constant speed to refine crystallized grains.
• The 15° inclined degree of cast mill and precise liquid level control of front box ensure the front box supply aluminum liquid to casting mouth under very precise pressure. From casting mouth the aluminum liquid fill into casting rollers of being cooled inside, the liquid spread in crosswise direction on roller surface. At this month, the liquid stays at roll gap slightly before roller center line and quickly cool down and solidify within short time, the casting crystallization is finished and then hot rolling makes the sheet. The heat energy in liquid is rapidly taken away by the rollers.
• The heat is transferred through casting rollers whose sleeve thermal conductivity is very good. Besides the rolling load, the roller sleeves bear the impact of thermal load in cycle of hot temperature and low cold temperature. The roller sleeve structure, material and cooling water temperature are critical factors of cast rolling.
• Each casting mouth can be precisely adjusted in horizontal and vertical direction, ensure good quality cast rolling.
• Each roller is driven by DC motor and planetary gear reducer, controlled by all-digit control system.
• Flame spraying system makes carbon sequestration to separate and lubricate aluminum liquid from sticking to rollers.
• After cast sheet leaving rollers, through guide roller, pinch feeding rollers, hydraulic shear, deflector roller, recoiler wind up the aluminum sheet from down driven by DC motor.
• The recoiler provides winding tension. When one coil winding is finished, the track shear cut the coming sheet with pinch feeding rollers hold the sheet tension, after recoiler start new coil winding, the pinch rollers open.
• The coil unloading car and hydraulic pusher unload coil from recoiler.

Parameters

Configuration:

1. The cast rolling mill is inclined, can sway to vertical and hydraulic change rollers.
2. Drive: AC motors independently drive upper roller and lower roller, with speed compensation function
3. Roller gap pre-adjusting: rough adjusting is adjusting cushion thickness and manual ratchet wrench through dual wedges to preset roller gap, fine adjusting is adjusting pressure of hydraulic cylinder for pressing up.
4. Roller surface lubrication: to-and-fro movable flame spraying.
5. Recoiling: control modes of constant tension or gradient tension.
6. Pre stressing control: closed loop control of pressure.
7. Pinch rollers:accurate control of lower roller linear speed to keep synchronous with casting machine speed.
8. Electric control system has the check functions of overload, over speed, locked rotor, etc.
9. Hydraulic system: two hydraulic pumps, one work one spare, the spare pump will work immediately when the work pump break down.
10. Casting mouth platform: the part where contact high temperature aluminum liquid is heat resisting cast iron. Manually fine adjusting. The design, making and installation should ensure safety and reliability of the equipment, won’t cause damage to drive transmission, signal, cables when front box and casting mouth leak aluminum liquid.
11. The liquid level height of flowing mouth box is checked by proximity switch and automatically controlled, front box liquid level is automatically controlled. Control precision ±1mm.
12. The touch screen setting is on main operator panel to set and show parameters and monitor machine working state.
13. Hydraulic oil pipelines are integrated by modular valves and integrated blocks.