[Case Analysis] Will using lead-free solder paste from morning till afternoon affect product quality?

Case analysis: On the assembly line, lead-free solder paste used every day is particularly wasted. The solder was exposed to high temperatures for too long, causing the flux to volatilize. The effect during the loading and unloading period is not very good. Sometimes, when lead-free solder paste is used from morning till afternoon, some even require the use of flux. In such cases, it will seriously affect the quality of the products after my furnace. How can it be solved? The following solder paste manufacturer will explain it to you:

1.SMTMechanical printing

1If it is a single case, I think it is not advisable to be extravagant and wasteful. It is better to use it at regular intervals and in fixed quantities, and call it up every two hours. If this is done, it won't be so hard during printing, and the quality of the product scraped out will naturally be better. After passing through the furnace, it will be relatively better. But there is one point. Of course, as long as you have a relatively long rest time in the afternoon, it is best to put the solder back into the bottle to prevent the flux from oxidizing.

2MultipleSMTThe production line uses one bottle.Lead-free solder pasteAfter use, another bottle is used. In this way, the exposure time to the air is less, and it is not necessary to distribute one bottle for each line. As a result, it will not be used up, and of course, it will be wasted. If it is exposed to high temperatures for a long time, the solder will be equivalent to being scrapped.

Second, hand-printed

If manual printing is found, doing so might be even more wasteful. It is recommended that people use one bottle of solder, which can completely accelerate the process of solder usage, reduce the time when lead-free solder paste is exposed to high temperatures, and open one bottle after use. At the same time, in the case of manual operation, the technical operation ability should be strengthened first, so as to reduce the extravagance and waste of soldering. Case Analysis A production line has a particularly large amount of lead-free solder paste wasted on a daily basis. The solder is exposed to high temperatures for too long, causing the flux to evaporate. The effect during the loading and unloading period of the furnace is not good. Sometimes, the lead-free solder paste in the morning even needs to be used in the afternoon when it was previously used. In such cases, it will seriously affect the quality of the products after the furnace. How to solve it?

1.SMTMechanical printing

1If it is a single case, I think it is not advisable to be extravagant and wasteful. It is better to use it at regular intervals and in fixed quantities, and call it up every two hours. If this is done, it won't be so hard during printing, and the quality of the product scraped out will naturally be better. After passing through the furnace, it will be relatively better. But there is one point. Of course, as long as you have a relatively long rest time in the afternoon, it is best to put the solder back into the bottle to prevent the flux from oxidizing.

2MultipleSMTThe production line uses one bottle of lead-free solder paste. After using it, another bottle is used. In this way, the exposure time to the air is less. It is not necessary to distribute one bottle for each line in this way. As a result, it cannot be used up, and of course, it is wasted. If it is exposed to high temperatures for a long time, the solder is equivalent to being scrapped.

Second, hand-printed

If manual printing is found, there might be more extravagance and waste. It is suggested that people can use a bottle of solder, which can accelerate the usage process of the solder, reduce the exposure time of lead-free solder paste to high temperatures, and then open one bottle after use. At the same time, in the case of manual operation, the technical operation ability should be strengthened first, so as to reduce the extravagance and waste of soldering.