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If you are an electronic processing and manufacturing practitioner who has been in PCBA processing plants for more than 4 years, you may have a simple but not complete understanding of the entire industry. Why do you say that? Because we generally have been in the industry for the first 3 years It is in the process of deep cultivation and learning of this post. It takes at least 4 years to have a comprehensive understanding of the preservation and management of components, PCB processing and SMT placement, and subsequent testing and inspection. However, some You don't necessarily know the inside story!
1. Recycling of tin dross
SMT patch and DIP plug-in post-welding will produce some waste, of which tin slag is the largest part of the waste. And because tin slag itself is harmful to the human body, this tin is not what our body needs. The tin used in patch processing is tin-based tin gold compound, so its price is not cheap, so tin slag After production, the regular PCBA factory will collect it in a special storage container and store it separately. Then hand it over to a company that specializes in tin slag recycling.
However, in order to save production costs, many PCBA manufacturers will directly return the tin slag to the DIP plug-in and then solder it again. This is what many companies will do, but it will not be stated on the surface. It is also something that few people know in a factory.
PCB factories should always insist on "quality is life", and we insist on the principle of never re-production of tin slag. This is our guarantee to customers.
2. Material loss rate
Many customers may know it. Assuming that 100 sets of products are produced by oneself, generally a very standardized project will give a loss table based on the BOM list on the entire PCBA circuit board. The above will show which material is a wearing part and which material is a non-wearing part. There will be more preparations for the purchase of wearing parts
Some materials, in order to maintain the entire order can be completed on schedule, after all, because of the loss of a few materials, the delivery time of the product cannot keep up, which is not advisable.
Therefore, generally experienced customers will prepare this information in advance. In fact, this information has already explained to the PCBA manufacturer their ability to withstand losses. Don't exceed my expectations, you will not be able to keep up if you exceed my delivery time. Therefore, manufacturers will also pay great attention to this matter in the SMT patch processing.
So for those customers who don’t ask for anything, they encounter an irresponsible PCB factory, and then a so-so operator, you just wait for the last 100 pieces of the board to be able to complete only 90 pieces, the rest is After 10 pieces of these worn-out parts are filled, they will be welded to you by hand. Therefore, before production, you must clearly explain what I want to do with the business or project directly connected to you in the PCBA factory. If you ask and don't ask, the final result is different!
The above are the two least noticeable inside stories in PCBA processing plants.
