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Copper wire Drawing oil process and matters needing attention
Apr 17, 2018

  Copper drawing oil, drawing oil, copper antioxidants, tin flux, ash oil, Bailashui oil, guide shaft oil hot-dip tinned copper wire production process is: line → annealing → pickling → tin → cooling → traction → lead shaft oil (reduce tin ash)------------------------------------- (1) line. The line is the key in production. Plating copper wire surface should be as smooth as possible round, in line with the requirements of national standards. The thin copper wire just pulled out because of lubrication on the surface, copper wire surface is extremely easy to oxidize, should be tinned as soon as possible. I suggest that the use of Φ300 wire plate (can be installed copper wire kg), and the need for copper wire line evenly, elastic to moderate, the disc along the smooth. It is advisable to use the more end type (without the amplifier), this is because the line diameter is relatively fine, the line speed is fast, the production process is very easy to disconnect. After repeated tests, we used on the plate with the line felt to stop the line, very good to avoid the line touch plate along.


At the same time, it increases the height between the reel and the guide wheel, improves the reliability of the line and reduces the chance of disconnection. (2) annealing. The annealing temperature of copper wire is the key factor affecting the elongation of finished product line. Since also to enter the Tin furnace two times, so the annealing temperature should not be too high (slightly lower than normal annealing temperature). For a diameter of 0. 2 mm below the thin line, it is advisable to control in 400~ 550°c, here to emphasize that a lot of equipment companies are now production of tin annealing anneal machine length is not the same, temperature is not the same, a number of electrothermal tubes, some electric wire, can be adjusted according to equipment temperature.

    So that the elongation reached the national standard. (3) Pickling. The copper wire enters the tin stove, must use the proper pickling liquid to carry on the cleaning, guarantees the tin layer and the copper wire to have the good adhesion. The pickling liquid uses tin flux, the proportion is 1:3. In order to ensure clean, should use felt pressure line way, blankets width of cm, regular use pickling liquid pouring felt special emphasis: please according to the principle of the higher concentration of wire diameter, using industrial soft water ratio effect better. Please put the welding flux into the help weld groove into the felt to slowly dilute, can not be directly poured flux into the blankets above, in the production process, the boot speed too fast, should put some more wade cloth, often replaced, to prevent the water tank too much to the copper wire, affecting the flux concentration, resulting in other problems, the less water belt, The smaller the dross, the less tin (4) tin furnace. Tin furnace equipment and tin furnace temperature plays a key role in the quality of the product. At present I have seen 3 kinds of tin furnace, one is the whole tin furnace materials from two cast iron pot formed and the bottom of the bottom of the triangle line by the electric heating tube temperature control, production of large specifications easy flat line, tin slag is not easy to operate, the second is the overall stainless steel pot, temperature control for the electric stove wire, tin Pan excellent operation, uniform temperature control, tin slag is less than three Japanese stainless steel tin pot from the three-section temperature control, The use of better and more scientific, tin furnace temperature is low, tin copper wire surface coarse, line surface easily produce tin tumor; The furnace temperature is high, then tinned copper wire is easy to yellow.


Easy disconnection, after repeated tests, the melting point of tin for 231°c, tin furnace temperature to 250--260°c (according to the production specifications appropriate adjustment tin furnace temperature) production of finished line surface coating smooth, continuous, elongation also reached the national standard. Tin in the furnace of tin in heating, the surface oxidation quickly, will cause waste. To prevent this, the surface of molten tin can be covered with a cloud of mother, charcoal powder, etc., but the management of ash caused dirty, to isolate the air and the surface of the tin liquid contact. It's best not to often scrape the surface of tin and copper wire combination of good or bad, in addition to copper wire surface need to be pickling, the purity of tin liquid itself is also an important factor.

    Therefore, the composition of the tin liquid should be tested every 1.2 months, of which copper content should not exceed 1%, such as more than 1% should be recycled treatment or change tin. (5) block tin mold. At present, many companies do not use my opinion or in the tin-plating machine to install a block tin mold device. The use of tin block mold mainly to prevent the tin particles and improper operation of the copper wire to affect the production of the next process, generally have wire drawing die and ceramic mold. The use of wire-drawing block tin mold, tinned copper wire surface quality is good, but the price is high. In general, the use of waste wire drawing die, production should pay attention to the adjustment of the angle of the mold, to ensure that the tin furnace pressure line fulcrum, scraping mold center point and the guide wheel on the support point in a straight-line. It is also a key factor affecting the quality of tinned copper wire to avoid the surface diameter of the tin die. Small aperture, frequent disconnection. The pore size is large, the tin layer is thick, the quality of the coating is affected, and the consumption of tin is increased and the cost is increased. After the production test and the product performance test, the tin-plated mold aperture should be 0 larger than the copper wire diameter.


MM for good. (6) Cooling mode. For the line diameter is less than 0. 2 mm tinned copper wire, it is advisable to use air cooling, production to control the traction and tinned copper wire out of the distance can be. For the wire diameter is 0. 2~ 0.


6 mm tinned copper wire, the use of air-cooled mode is better, it can effectively avoid tinned copper wire because the cooling is not enough in the wire after the line between the sticky tin phenomenon, to ensure the surface quality of tinned copper wire. (7) The guide shaft oil, should be a more important process, tinned copper wire more or less have tin ash, in the production of wire stranded wire process such as 7/0.127,7/0.16. 11/0.16,11/0.127,17/0.178,41/0.16,41/0.15 to the stranding of the strict, tinned wire tin ash will cause the whole strand, should be gaga guide shaft oil to prevent the production of tin Ash (Brief introduction) (8) line, traction speed. The line diameter and the speed of traction should be determined according to the size of the wire. At the same time also consider annealing (and copper wire in the tin furnace time traction speed too fast, will lead to insufficient annealing and influence elongation, but also increase the probability of disconnection; too slow the copper wire in the annealing furnace time is too long, the line will be hard.


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