This research is a natural extension of the advantages of the T3 tin powder that is compared to the mainstream in the tin paste in 2011. The tin powder provides a moderate improvement in the consistency of the amount of tiny paste. The conclusion is that other variables, including welded paste formulas, steel mesh coatings and wiping materials under the steel mesh may have a significant effect on the performance of transfer efficiency, such as tin powder diameter size. With the continuous miniaturization of printing characteristics, it is possible to further reduce the size of tin powder diameter to adapt to continuously narrowing the opening size and increased opening density. This research will help us clearly reduce the advantages of the powder diameter size between T4, T5 and T6 SAC305 welded powder, and determine any harm to reduce the size of tin powder diameter.
It is important that as the size of the particles is reduced, the printing performance is improved, but the effect of surface oxide on particles has begun to become a factor affecting the shelf life and reflux performance. The results of the particle size pass by the J-STD-005 test are shown in Table 1.
Table 1 \u0026 ndash; Jedec standards of welded paste particles
Welding paste printing have two principles that need to be obeyed, they are \u0026 ldquo; 5 -ball rhythm \u0026 rdquo; and 0.66. The 5 -ball law refers to 5 times the size of the smallest printing mesh. The smallest mesh size corresponding to the T5 powder should be 4.5mil, and the minimum mesh size corresponding to the T6 powder should be 2mil. In the same way, the calculation of the area ratio refers to the area of \u200b\u200bany steel mesh opening of the hole, which should be not less than 0.66, that is, the performance window boundary and additional performance of the T3, or the consistency of re -designing to maintain the printing performance. This study will reveal whether these rules are applicable to ultra -fine powder (UFP) welding paste, or whether it should be re -considered.
Finally, considering the progress of welding paste chemistry is very important; steel foil alloys; cutting, coating and assembly technology; at the same time printing machines and welded paste detection technology. All these progress has developed simultaneously, and undoubtedly changed the existing model and improved the printing process.
tin powder requires ultra -micro crushing equipment. Our tin powder super microfinance equipment has a variety of equipment, super fine air flow crusher, air shock grinding, airflow classifier and other equipment.
From the question to the design of the plan, Youmingke provides customers with the most professional answer and the most comprehensive solution, and assist customers to formulate construction plans to provide customers with the most professional \u0026 ldquo; nanny level \u0026 rdquo; private ordering; Services. You Mingke has served more than 3,000 customers at home and abroad, and sold in more than 100 countries and regions in Asia, Africa, Europe, the United States and Oceania. Wide praise.123]
Youmingke is the first batch of intellectual property bidding enterprises in Shandong Province. In the same industry, it has passed the ISO9001 quality management system authoritative certification.At the same time, Youmingke has the right to free import and export, and has obtained the CE certification of the EU and exported to Russia. The design of the pharmaceutical fan machine fully meets the GMP certification requirements and can pass GMP and FDA certification.