Sovema

Lead Strip Production Line

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1) AUTOMATIC LEAD INGOTS FEEDER:
Robust chain conveyor for storing and transporting lead ingots to the melting pot.
A system of limit-switches synchronizes and controls step by step ingot feeding.

2) LEAD MELTING FURNACE, CAPACITY 15 TONS:
The unit is composed of two steel melting pots with a built-in weighing system to accurately control filling with lead ingots. Automatic temperature control system complete with electronic heat adjustment. Integrated delivery pump for molten lead alloy with adjustable flow control.

3) SCRAP CONVEYOR SYSTEM:
The system consists of three separate conveyor belts. The main one collects all the scraps generated by the raw strip cutter and trimming unit and feeds it back to the main melting pot.

4) TAB-BLANKING SCRAP RECOVERY SYSTEM:
This system of conveyor belts allows recovery of the scrap produced at tab-blanking on the expanded metal line, by slowly feeding them into the melting pot.

5) ALLOY PREPARATION SYSTEM:
The system allows the alloy to be prepared directly in the melting pot. Additives are introduced to the bottom of the pot where they are quickly mixed into the alloy by the re-circulating action of the pump.

6) CASTING MACHINE:
For continuous casting of lead strip of dimensions 100mm x 12mm (other widths are available to customer requirements up to a maximum of 120mm).
The Casting Machine has the following features: Specially designed pouring ladle for filling the alloy, electrically heated and with an automatic level control.
Steel casting wheel, with a drive unit controlled for synchronisation with the rolling mill. Seamless steel belt covering the casting wheel wit a spring loaded deflection roller, water pump for cooling with adjustable volume in order to control the temperature of the raw strip.

7) AUTOMATIC RAW STRIP CUTTER:
This units cuts the raw strip into small pieces. This operation is used to return the raw strip back to casting if the downstream equipment has to be stopped, or at start-upwhen the initial few meters of raw strip need to be scrapped and returned to the melting pot.

8) STRIP COOLING UNIT:
This unit sprays cooling water onto the raw strip in order to control the temperature before the rolling operation.

9) ROLLING MILL:
Has six rolling stations to process the raw strip followed by one independently driven finishing station, which precisely finishes the strip to a final thickness within the range 0.7mm to1.2mm . The rolling mill is surrounded by a tank containing an emulsion of 1% oil in water in order to lubricate and temperature control all the stations. A re-circulating pump is used to provide a continuous flow of emulsion. A water heat exchanger controls the temperature inside the tank and a filtering system continuously cleans the emulsion.

10) STRIP CLEANING UNIT:
The unit cleans and dries the strip by blowing air and returning residual emulsion back to the main tank.

11) TRIMMING UNIT:
This unit cuts the side of the strip and trims it to the desired width. The unit also cuts up the scrap produced during the trimming process into small pieces so that they can be easily returned to the melting pot. If required the unit can also cuts the entire strip, if any alarm occurs.

12) TWIN RE-COILER & COIL TILTING/LAYING DEVICE:
It is a unit which is able to rotate at 180° on a horizontal axis and supports two coils of strip. When one coil is completed, the strip starts automatically to wind onto the second coiling station. In the meantime, the full coil is stored vertically on a cradle, onto which a pallet has been previously placed. When two coils have been completed, they are both rotated through 90° to be picked up by a forklift.

13) AUTOMATIC TAPE APPLICATION:
There is an automatic system to place adhesive tape onto the coil before pallesiting.

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