What is the reason for the large amount of tin slag? What should I do if there is a lot of slag in t

The generation of solder dross is caused by many reasons, including the product quality, operation methods and maintenance methods of machinery and equipment, welding materials. It is often encountered that many factories do not care about the height of the tin surface, and some factories use only about 5kg of tin slag for 8 hours, and some factories have more than 10kg of tin slag for 8 hours. Professional tin factory on tin bars.

Manufacturing has corresponding professionalism, I think that the process technology is more standard and the maintenance of machinery and equipment is better in the factory tin dross, so the process technology and machinery and equipment are important. In addition, solder curing is also necessary! Most factories only know how to put tin into the tin pot, and they are still investing after a few years, so they should do regular solder testing and adjustment of the tin pot.

How to deal with too much slag during the use of tin bars?

To treat the excessive solder slag mentioned in wave soldering, it should be clear whether the solder slag is normal, usually the black powdery solder slag is normal, and the tofu-like solder slag is not normal. For this case, the formation of solder dross has the following points:

1. The important reason is the situation of the wave furnace machinery and equipment: at this stage, the design of some wave furnace on the market is not perfect, the wave peak is too high, the peak platform is too wide, the double wave furnace is too close and the rotary pump is used. The crest is too high, the welding material falls down from the peak, the temperature difference is very large, the welding material mixed with air rushed into the tin furnace to cause oxidation and semi-dissolution, and for the generation of solder slag, the rotary pump does not take preventive measures, continue to press the solder slag into the furnace, and the chain reaction of the loop exacerbates the generation of solder slag.

2. The temperature of wave soldering is usually very low, usually 280 5 (for lead-free tin bars), and this temperature is the most basic temperature to be reached, if the temperature is too low, the tin can not achieve an effective dissolution, which indirectly causes too much solder dross.

3. For artificial reasons, it is also very important to add tin bars at a good time, and the most appropriate process of adding tin bars is to keep the distance between the tin surface and the peak to be the shortest.

4. Whether the tin slag is often cleaned, so that the solder falling down from the peak can quickly enter the furnace, instead of staying on the solder slag, the uneven heating will also cause too much solder slag.

5. The daily cleaning of the furnace is also very important, and the sediment content in the furnace is high for a long time, which is also one of the reasons for the excessive tin slag.

Due to the generation of solder slag caused by many factors, involving equipment and solder (including auxiliary consumables and equipment) quality and use and maintenance methods, in short, all parties have their own expertise and goals, and I believe that we have been working hard to improve their products and put forward new requirements, equipment, solder and manufacturing in the strong do not give up the opportunity here, mutual communication is the only 1 verification basis, hope that the strong balance the strong and the weak to keep up.

The manufacturability impact is relatively large, including the equipment! It is often encountered that many factories do not pay attention to the height of the tin surface. The tin slag used in N factories of the same model series of tin bars is only about 5kg for 8 hours, and the solder slag of N factories produces more than 10 kg for 8 hours.

Regular tin factories have a certain degree of technology for the production of tin bars, and I think that the tin slag situation in factories with more standardized processes and good equipment maintenance is less, so the process and equipment are the main thing.

Of course, solder maintenance is also needed! Many factories only know how to put tin into the tin pot, and they are still pouring tin after a month, a year, or two years. Solder maintenance generally needs to be supported by the best business, and it is necessary to regularly test and adjust the solder pot for customers.

1.The solder slag is not cleaned frequently, so that the tin content that falls from the peak cannot enter the furnace as soon as possible, instead of remaining on the solder slag; Uneven heating will also cause too much solder dross.

2.The usual cleaning furnace is also very critical, if the furnace is not cleaned for a long time, the impurity content in the furnace is high, which will also cause one of the reasons for too much tin slag, and the furnace should be cleaned regularly to change the tin, generally about once every six months.

3.The temperature of the wave furnace is generally controlled relatively low, generally 250 5 (for 63 37 tin bars), and this temperature is the most basic temperature required by the solder in the soldering process, the temperature is too low, so that the tin can not achieve a good dissolution, and it will cause too much solder dross when used.

4.It is a problem with the wave furnace equipment: the wave peak is too high, when the solder falls from the peak, the temperature reduction deviation is relatively large, and the solder is mixed with air and rushes into the tin furnace, resulting in oxidation and semi-dissolution, resulting in the generation of solder dross.

5.The purity of the tin bar is also related, the wave furnace generally requires a high purity tin bar, and the tin bar with many impurities will cause too much solder dross during soldering.

6.If the tin is used for too long in the wave furnace, the oxidation resistance of the tin itself is decreasing, resulting in an accelerated oxidation rate, which affects the increase in the amount of solder dross.

There is a lot of tin slag in tin bars, because the purity is not enough, and it contains impurities such as aluminum.

The solder in the tin pot can be roughly described from two aspects: control and treatment

One. Methods to control and reduce dross generation:

1.Reduce the height of the tin wave, reduce the drop and impact force of the tin wave;

2.The other area other than the plate is covered with stainless steel plate to reduce the solder dross generated in contact with the air;

3.The tin slag with the cover on the surface of the tin liquid should be fished as little as possible to reduce the flow of the tin liquid;

4.The tin temperature control should be reasonable, the higher the tin temperature, the faster the oxidation, and the more solder slag will be generated;

Two. There are two main methods of treating solder slag: physical reduction and chemical reduction

1.Physical reduction is to concentrate the solder slag into the reduction machine through high temperature, kneading, separation, filtration and then reduce into tin rod, the reduction rate is only about 70%;

2.There are two kinds of antioxidant powder and antioxidant commonly used in chemical reduction, the effect is good, the reduction rate can reach more than 90%, and it is directly added in the tin bath, but the maintenance is more troublesome;

Buy a little pure tin bar, pay attention to the operation of the soldering personnel and add appropriate tin to store in the tin pot, clean the tin pot at the appropriate time, and ensure the normal temperature of the tin pot.

There is a lot of solder in the tin furnace, first of all, find out the reason for the large amount of solder slag:

Reduce the height of the tin wave, reduce the drop and impact force of the tin wave (add tin bars in time to improve the tin level);

Whether the tin bar is pure new tin bar, or the tin bar produced by reusing tin will also have more tin slag;

The tin slag with the cover on the surface of the tin liquid should be fished as little as possible to reduce the flow of the tin liquid;

The higher the tin temperature, the faster the oxidation, the more solder slag will be generated;

After the above control, if it still does not meet the requirements, solder slag reduction powder can be used to control the generation of solder slag.

The solder in the tin pot can be roughly described from two aspects: control and treatment

One. Methods to control and reduce dross generation:

1.Reduce the height of the tin wave, reduce the drop and impact force of the tin wave;

2.The other area other than the plate is covered with stainless steel plate to reduce the solder dross generated in contact with the air;

3.The tin slag with the cover on the surface of the tin liquid should be fished as little as possible to reduce the flow of the tin liquid;

4.The tin temperature control should be reasonable, the higher the tin temperature, the faster the oxidation, and the more solder slag will be generated;

Two. There are two main methods of treating solder slag: physical reduction and chemical reduction

1.Physical reduction is to concentrate the solder slag into the reduction machine through high temperature, kneading, separation, filtration and then reduce into tin rod, the reduction rate is only about 70%;

2.There are two kinds of antioxidant powder and antioxidant commonly used in chemical reduction, the effect is good, the reduction rate can reach more than 90%, and it is directly added in the tin bath, but the maintenance is more troublesome;

There are many solder in the tin furnace

1: Use the original tin ingot to cast the tin bar.

2: The normal tinning temperature should not be used normally according to the temperature provided by the manufacturer.

3: Try to salvage the tin surface as little as possible during the tin passing time.

Too much solder dross will lead to many quality problems, too fast generation of solder dross, will waste a lot of tin material, this problem may be the addition of tin bars containing too many impurities, or the amount of tin is highly incorrect.

No matter how good the solder is, there will be solder dross, which is the oxide in the soldering process. There is less solder dross with high purity, and more vice versa. I can only find the best high, honest factory to sell, (the country's first tin slag), how much is a pound in real time, you can ask me.

The solder in the tin pot can be roughly described from two aspects: control and treatment

One. Methods to control and reduce dross generation:

1.Reduce the height of the tin wave, reduce the drop and impact force of the tin wave;

2.The other area other than the plate is covered with stainless steel plate to reduce the solder dross generated in contact with the air;

3.The tin slag with the cover on the surface of the tin liquid should be fished as little as possible to reduce the flow of the tin liquid;

4.The tin temperature control should be reasonable, the higher the tin temperature, the faster the oxidation, and the more solder slag will be generated;

Two. There are two main methods of treating solder slag: physical reduction and chemical reduction

1.Physical reduction is to concentrate the solder slag into the reduction machine through high temperature, kneading, separation, filtration and then reduce into tin rod, the reduction rate is only about 70%;

2.There are two kinds of antioxidant powder and antioxidant commonly used in chemical reduction, the effect is good, the reduction rate can reach more than 90%, and it is directly added in the tin bath, but the maintenance is more troublesome;

If you solve the problem of more solder dross in wave soldering, mainly the crest height, width, flow rate, tin material, flux, and solder pot uniformity, if you want to have a lower loss, you can only use a fully automatic dip soldering machine, so that the loss and 1 10, and it is possible to weld long feet, instead of high wave soldering!

Fully automatic dip welding machine-DS300TS

Tin pot tin dxt-707 use a little more tin, cheap plus tin slag feeling more expensive. Put tin slag reducing agent, and add it one by one according to the number of thousandths.

Solder dross is a waste material generated in the production process, and the solder dross itself has a high tin content, but it is difficult to reuse because of the refractory sn-cu alloy in its composition. The generation of tin dross has its inevitability and regularity, and it can be minimized by paying attention to all aspects of the procedure in the production operation. <

Solder dross is a waste slag material generated in the production process, and the solder dross itself has a high tin content, but it is difficult to be reused by Oak Sakura because of the refractory sn-cu alloy in its composition. The generation of tin dross has its inevitability and regularity, and it can be minimized in all aspects of the production operation.

What is the tin content of handmade solder dross, you are asking? The tin content of the item is between 70% and 90%.

Because handmade solder dross is usually formed by melting the tin and then cooling and solidifying. In this process, impurities and oxides in the tin will precipitate into the dross, which increases the tin content of the dross. Handmade solder dross is usually obtained after many smelting and screening, and a tin content of between 70% and 90% is normal.

The tin content of manual tin slag varies depending on the production process and raw materials, the tin slag with a high tin content is usually made of high-purity tin materials, and the production process is more refined, while the tin slag with a lower lead tin content may be made of waste tin from Bimin, or the production process is not fine enough.

Causes of solder dross and measures to avoid it:

After the tin bar is melted, it is inevitable that the oxidation of the surface of the tin liquid and the action of the metal elements (mainly Cu) will produce some residues, that is, the surface of the molten tin will continue to oxidize to form tin slag, which will lead to the increase of solder loss and the relative increase of product cost. A small amount of dross is normal, but if the amount of dross is too large, or the interval between slag removal is too short, there may be a problem with the process design or the quality of the solder bar is not up to standard.

The reasons for the excessive slag of tin rod in the use process are mainly due to the following reasons: for the hand dipping furnace, there is a lot of slag and the tin surface is sometimes yellow or purple, which may be that the furnace temperature is too high during the operation or the tin pot has not been cleaned for too long, resulting in excessive antioxidant loss and can not play a role, this situation can be solved as long as a small amount of antioxidant is added or the furnace is cleared, and then the temperature of the tin pot is controlled.

Wave furnace, first of all, to distinguish whether the tin slag is normal, generally black powdery solder slag is normal, but tofu-like solder slag is abnormal, for the abnormal tofu-like solder slag and the causes have the following reasons: human reasons, tin supplement is not timely, the most suitable time to add tin is to always keep the distance between the tin surface and the peak to be the shortest.

Every day, check the height of the stove before each start-up. Don't open the crest first, but add tin bars to make the solder in the tin pot reach the fullest state. Then turn on the heating device to melt the tin bar.

If there is solder dross, it can be controlled by solder dross reducing powder.

DXT-398A flux for hand dipping furnace, if the tin surface slag is sometimes yellow or purple, this situation may be that the furnace temperature is too high or the tin pot has not been cleared for too long, resulting in excessive oxidation loss, as long as a small amount of antioxidant is added or the furnace is cleared, the new tin strip DXT-707 can be added, pay attention to control the temperature of the tin pot.

Tin strip DXT-707A uses good pure tin strips, refuses to use secondary ** tin, less waste, and it is better to clean the tin pot with tin strip antioxidant strips.