SMTLead-free solder pasteAnalysis of the causes of solder deficiency in printing?At present, many companies choose lead-free solder paste products and processing techniques.The welding hardness of the soldering area with less tin after reflow soldering oven is insufficient.Then, lead-free environmental protection solder paste, as an important part of lead-free processing technology, its characteristics are increasingly attracting our attention.The specific situation of insufficient tin due to pitting can solve the problem of the product quality of the heavy metal-free solder paste manufacturer. Generally, the pitting is not good enough to followSMTThe influence during the production process of the manufacturer is relatively close. In the specific handling process of the production line's poor performance, it was found that this poor performance is closely related to the solder paste packaging printing steel mesh and the scraper.Some problems arising from lead-free processing techniques, such as alloy selection We will delve into aspects such as printability, low-temperature reflux, and cavity level. Meanwhile, today, the editor of JJY will introduce to you the corresponding features of the new generation of lead-free solder paste products.

    1,SMTThe squeegee for packaging and printing in the no-heavy metal solder paste processing factory is too soft
    Theoretically speakingSMTThe blade of the solder paste scraper applied by the manufacturer ispcPolycarbonate, if the hardness of the solder paste scraper is insufficient, during the entire process of packaging and printing solder paste without heavy metals, the soft polyurethane material blade deforms and inserts into the perforated area of the steel mesh, causing the already set solder paste to be removed, resulting in poor scraping.
    2Excessive working pressure of the scraper causes deformation
    The cutting edge used in the solder paste packaging and printing process is soft. If the pressure of the packaging and printing work is increased too much, it will cause deformation, and the cutting edge may become uneven. The uneven cutting edge functions on the steel screen. The interaction force exerted by the concave and convex cutting edge parts on the solder paste is different, which leads to the situation of scratching. The manufacturer of heavy metal-free solder paste suggests that the main parameters of the production line can be adjusted and the main parameter of the scraper pressure can be moderately reduced.
    3The steel mesh without heavy metal solder paste was damaged
    If the solder paste is evenly applied to the steel mesh, it may cause damage to the openings of the steel mesh during the actual packaging and printing process The function of the scraper is that if there is no heavy metal solder paste in the damaged area of the steel mesh and it cannot be scraped clean or the scraper immediately scraped into the opening area of the steel mesh, the solder paste in the opening area of the damaged steel mesh may be stuck, resulting in poor scraping.
    4The blade of the scraper was damaged

    Lead-free solder pasteThe scraper is made of soft polyurethane material. If it gets damaged, the damaged pipeline will also enter the steel mesh opening and scrape out too much solder paste, thereby reducing the total amount of solder paste in the steel mesh opening area.

The solder paste of Shenzhen JJY brand has gone through many years12A solder paste and wire manufacturer specializing in the research and development of solder paste, solder wire, solder wire, lead-free solder paste, leaded solder paste, solder rods, leaded solder paste, etc. Our main business includes:LEDType solder paste, lead-containing solder paste, lead-containing silver solder paste, stainless steel plate type solder pasteSMTSolder paste and wire manufacturers of type solder paste, lead-free flux paste, no-clean solder wire, lead-free solder wire, leaded solder wire, lead-free and leaded solder rods, wave solder rods, automatic solder wires, etc