Characteristics of Q9 energy-saving scraper:
1. The printing width of white iron plug can be adjusted at will, which reduces the present situation that a machine is equipped with multiple sets of scrapers with different sizes.
2. The white solder blocks at both ends can be adjusted to a reasonable printing width according to the length of the PCB, and the solder paste can be put in according to the width of the PCB, which greatly reduces the invalid rolling of the solder paste.
3. The bottom of the tin block is closely attached to the steel mesh, and the solder paste is not easy to overflow from both sides of the tin block, which can ensure the rolling use of the solder paste in the effective screen printing area and reduce the poor printing quality caused by flux volatilization, tin powder oxidation, solder paste viscosity reduction, etc.
Common scraper problems:
1, the tin shield cannot be flexibly adjusted with the length of PCB, and scrapers with different sizes need to be selected according to the length of PCB, resulting in increased cost.
2. According to statistics, only two-thirds of the residual solder paste at the opening of the steel mesh is used for effective rolling, and the remaining one-third is used for ineffective rolling for a long time.
3. The redundant solder paste on both sides of the opening of the steel mesh rolls ineffectively for a long time, which leads to the volatilization of flux, the oxidation of tin powder, the increase of solder paste viscosity and the drying and caking. If recycled, it will lead to poor printing quality such as missing printing and less printing, which will directly affect the welding yield.
The invention patent number of Q9 energy-saving scraper is 201010545723.6438+0.
Q9 utility model patent number of energy-saving scraper: 20 1020608720.3
Q9 Design patent number of energy-saving scraper: 201030615631.7.