The operation process of manual solder paste printer mainly includes putting plate, positioning, printing, taking plate and cleaning steel mesh.
1. Secure the steel net
Use the fixing device to fix the steel net on the printing machine. After the fixing, ensure that the steel net and PCB are in flat contact, not uneven or one-sided contact, otherwise it is easy to cause the collapse of the solder paste printing point, affecting the printing quality and the service life of the steel net.
2. Location of PCB
When printing by hand, PCB generally adopts edge positioning mode, that is, positioning according to the positioning hole position on the board. After positioning, ensure that the mesh of the steel mesh is accurately aligned with the corresponding PCB pad. In order to have a good solder joint appearance, the general requirements of solder paste and pad dislocation degree is less than 10%.
There are four steps in the stencil printer printing process.
1. The return temperature and mixing good solder paste level and paste on the steel net, solder paste do not take too much, along with the printing.
2. Place the PCB to be printed in the correct direction at the location of the printing table, put down the steel mesh, and check whether the mesh and PCB pad are aligned correctly.
3. Scrape the solder paste with a scraper, so that the solder paste on the steel net is rolling and printed from the top down along the direction of the PCB.
4. Remove the printed PCB from the printing table. Check whether there is leakage, more tin, less tin, even printing phenomenon. Unqualified with washing plate wash off the above tin paste, to be dry after reprinting board.
Zhejiang NeoDen Technology Co., Ltd. has been manufacturing and exporting various small pick and place machines since 2010. Taking advantage of our own rich experienced R&D, well trained production, NeoDen wins great reputation from the world wide customers.
We believe that great people and partners make NeoDen a great company and that our commitment to Innovation, Diversity and Sustainability ensures that SMT automation is accessible to every hobbyist everywhere.
Add: No.18, Tianzihu Avenue, Tianzihu Town, Anji County, Huzhou City, Zhejiang Province, China
Phone: 86-18167133317
Post time: Sep-16-2021