smt produces airflow delivery device with tin-based spherical solder powder

Abstract

The invention discloses an airflow conveying device for producing tin-based spherical solder powder for SMT, which comprises a centrifugal atomization chamber, a cyclone conveyor is arranged at the lower part of the centrifugal atomization chamber, and the cyclone conveyor passes through a feed inlet provided at the upper end and the centrifugal atomization chamber The lower part is connected, the side of the cyclone conveyor is provided with an air inlet, and the upper part of the cyclone conveyor is also provided with a discharge port; the air outlet of the centrifugal blower is divided into two paths, and one path is connected to the cooler and the air inlet of the cyclone conveyor in turn through the pipeline , the other way communicates with the upper part of the coarse powder collection chamber through the pipeline, the top of the coarse powder collection chamber is equipped with a classifying impeller, the discharge port of the cyclone conveyor is connected with the side of the classifying impeller through the pipe, and the output end of the classifying impeller communicates with the fine powder collecting chamber through the pipe , The fine powder collection chamber is provided with an air outlet connected to the air inlet of the centrifugal blower. Solve the problem of dust escaping caused by powder handling in the process of welding powder production, and the temperature rise of centrifugal atomized powder in the transfer barrel to change its microstructure and properties.

Description

technical field [0001] The invention belongs to the technical field of metal powder preparation, and relates to an airflow conveying device for producing tin-based spherical solder powder for SMT. Background technique [0002] The production process of ordinary solder powder consists of centrifugal atomization-airflow classification-ultrasonic vibrating screen. The lower end of the centrifugal atomization system is equipped with a transfer barrel, which is collected for 2 to 3 hours before being put into the airflow classification system. In this way, the powder needs to be transported during the welding powder production process, which will cause dust to escape; and the temperature of the centrifugal atomized powder in the transfer barrel will increase, which will change the microstructure and properties of the centrifugal atomized powder. Contents of the invention [0003] The purpose of the present invention is to provide an airflow conveying device for producing tin-ba...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an airflow conveying device for producing tin-based spherical solder powder for SMT, which solves the problem of dust escaping caused by powder handling during the solder powder production process, and the temperature rise of the centrifugal atomized powder in the transfer barrel changes its microstructure and properties The problem

Images