1. Solder paste printing machine scraper type: solder paste printing according to the characteristics of the solder paste or red glue to choose the appropriate scraper, most of the mainstream scraper is made of stainless steel.
2. Scraper Angle: the Angle of the scraper scraping tin paste, generally between 45 and 60 degrees.
3. Scraper pressure: scraper pressure affects the amount of solder paste, the greater the pressure of the scraper, the less the amount of solder paste, because the pressure is large, the gap between the plate and the circuit board compressed.
4. Scraper speed: the speed of the scraper affects the shape and quantity of solder paste printing, and will directly affect the quality of solder. Generally, the speed of the scraper is set between 20-80mm/s. In principle, the speed of the scraper must match the viscosity of the solder paste.
5. Demoulding speed of steel plate: demoulding speed is too fast, easy to cause the phenomenon of tin paste wire drawing or pointed.
6. Whether to use vacuum seat: vacuum seat can help the circuit board smoothly stick on the fixed position, strengthen the tightness of the plate and PCB circuit board.
7. Whether the circuit board deformation: deformation of the circuit board will make the solder paste printing uneven, most cases cause short circuit.
8. Steel plate opening: steel plate opening directly impression solder paste printing quality.
9. Steel plate cleaning: whether the steel plate is clean is related to the quality of solder paste printing, especially the contact surface between the steel plate and the PCB circuit board, to avoid the residual solder paste underground on the PCB should not have solder paste position. General SMT factory in the production of a few board with clean paper plates at the bottom, after some stencil printer machine design with automatic cleaning function, also want to define how much every time sheet will be taken down to cleaning with solvent, the purpose is to remove residual solder paste with steel plate opening, especially the PCB solder small spacing, ensure to print solder paste is not blocked.
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. In our global Ecosystem, we collaborate with our best partners to deliver a more closing sales service, high professional and efficient technical support.
Add: No.18, Tianzihu Avenue, Tianzihu Town, Anji County, Huzhou City, Zhejiang Province, China
Phone: +86-18167133317
Post time: Sep-22-2021