|Title of Invention||
A METHOD OF HOT DIP GALVANISING OR ALUMINSING OF MS WIRES or STEEL SECTION AND THE PRODUCT MADE BY THE SAID METHOD
|Abstract||A method of hot dip galvanizing/aluminsing of ms wires comprising the steps of: surface cleaning the Electrode Grade Wire by pickling with HCI, water washing the pickled wire and then neutralized using lime /borax solution followed by cold drawing the wire rod in the normal continuous wire drawing machines and spooling the wire in a spool and keeping 10 such spools on a specially designed payin, passing the said 10 wires simultaneously through a degreasing tank heated to 70 to 80 deg C to degrease the wire drawing lubricant, washing the said wires by hot water at 85 to 90 Deg C, making the wires pass through the anneaing furnace wherein. The annealing furnace is a tube furnace with 10 tubes electrically heated to 800 to 900 Deg C, there are three passes within the furnace and the tubes are filled with cracked ammonia, which is burning at the inlet ends, keeping the speed of wires constant by an variable speed drive winding motor which is given feedback through a load cell and a dancer roll in one of the wires immediately dipping the existing wire, which is at 440 to 770 degree centigrade in to a molten zinc/aluminium silicon alloy tank which is at 460 degree centigrade and a part of it covered with Ammonium chloride and Zinc Chloride Flux or other flux, wiping the excess zinc/aluminium alloy from the coated wire using asbestos covered wires, winding the coated wires on 10 spools mounted on a winding station, checking the wire for coating and tensile strength.|
|Full Text||FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
A METHOD OF HOT DIP COATING OF STEEL WIRES/ STEEL SECTIONS
AND THERE OF THE PRODUCT
SUNIL SHANTISARUP GUPTA
FIAT NO-1,3rd FLOOR, MITRA KUNJ 16, PEDDER ROAD, MUMBAI-400026 MAHARASTRA, INDIA
THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES THE NATURE OF THE INVENTION
This invention relates to a method of hot dip coating of Steel wires/ steel
sections and there of the product.
In the conventional process, Lead, Flux and Zinc in huge quantity is used. 20/30 tons of Lead are super heated, followed by pickling, Fluxing and hot dipping in 20 tons of molten zinc.
In our process only 1.5 tons of zinc are heated and there is no need for pickling nor fluxing. This is huge saving in costs and pollution. Poisonous Lead is excluded and environment unfriendly pickling is eliminated. Hence this process is environment friendly and immensely cheaper than the conventional process.
The steps of this method are as follows:
1. Wire Drawing: Low Carbon Steel Wire Rods in coils are surface cleaned by pickling with HCL, water washed and then neutralized using lime solution.
2. Diameter of the wire rod is 5.5mm.The wire rod is cold drawn in the normal wire drawing machines using TC Dies in 9 passes to a diameter of 1.38mm
3. The wire is spooled in a spool. The final drawing speed is 400m/min.l0 Such spools are then loaded in a specially designed payin.
4. 10 wires of 1.38mm are simultaneously passed through a degreasing tank heated to 80 deg C to degrease the wire drawing lubricant.
5. This followed by a hot water wash at 80 Deg C
6. The wires then enter the annealing furnace. The annealing furnace is a tube furnace with 10 tubes electrically heated to 850 Deg C. There are three passes within the furnace. The tubes are filled with cracked ammonia, which is burning at the inlet and outlet ends.
7. The speed of the wires is 40 m/min and is kept constant by an eddy current winding motor which is given feedback through an electronic arrangement in one of the wires.
8. The annealed wires exit at 440 deg C and immediately dip into the Zinc Tank. The Zinc Tank is at 460 Deg C and a part of it covered with Ammonium chloride and Zinc Chloride Flux.
9. The wire are coated and excess zinc is wiped using asbestos covered wires for wiping. The Zinc coating is kept at 96 to 100 gms per sq. m
lO.The coated wires are then wound on a winding station having 10 Spools. The spools are of a open able type to remove the wire bundle from the spool.
11 .The wire is checked for coating and tensile strength.
12.Packing of the wire bundle is then done manually
13.Weight of each wire bundle is approx. 100 kgs. With the inner diameter as 500 mm and outer diameter 735 mm
14.Similarly Aluminium Alloy coating 7-9 % Silicon can also be used to manufacture aluminium coated wires. The temperature in the molten bath for aluminium is 770 Deg. C. Aluminium alloy is in the same pot which is used to hold Zinc.
DATED THIS 12th DAY OCTOBER 2006
SUNIL SHANTISARUP GUPTA (SIGNATURE OF APPLICANT)
1700-MUM-2006-FORM 2(TITLE PAGE)-(19-5-2009)-.pdf
1700-MUM-2006-FORM 2(TITLE PAGE)-(19-5-2009).pdf
1700-mum-2006-form 2(title page)-(complete)-(9-4-2007).pdf
1700-mum-2006-form 2(title page)-(granted)-(13-1-2010).pdf
|Indian Patent Application Number||1700/MUM/2006|
|PG Journal Number||3/2010|
|Date of Filing||16-Oct-2006|
|Name of Patentee||SUNIL SHANTISARUP GUPTA|
|Applicant Address||FLAT NO-1, 3rd FLOOR, MITRA KUNJ 16, PEDDER ROAD, MUMBAI-400026,|
|PCT International Classification Number||C23C2/12, C23C2/38|
|PCT International Application Number||N/A|
|PCT International Filing date|