A sealed squeegee for supplying a solder paste with a uniform density, the sealed squeegee comprising:
- a chamber housing (100) having a first end and a second end, wherein a direction extending between the first end and the second end is defined as a longitudinal direction of the chamber housing (100), and the chamber housing (100) is used to supply the solder paste to a mask with the uniform density,
- a solder mixer (200) including:
- a pressurization chamber (210) that is formed to pass through the chamber housing (100) and has a “V” shaped cross section to uniformly mix the solder paste through pressure application and pressure buffering to left and right sides of the “V” shaped cross section orthogonal to the longitudinal direction of the chamber housing (100), and
- a nozzle unit (220) that externally discharges the solder paste that is supplied and uniformly mixed in the pressurization chamber (210) and is formed to pass through a lower surface of the pressurization chamber (210);
- a squeegee blade holder (300) to which
- a squeegee blade (310) is coupled, the squeegee blade (310) being coupled to a lower side of the chamber housing (100) and configured to evenly spread the solder paste on the mask when the solder paste is supplied on the mask;
- a holding and placing unit (400) in which
- vertical surfaces (402) protrude above the pressurization chamber (210), and
- a placing horizontal surface (404), which includes at least one solder inlet (406), communicating with the pressurization chamber (210) and for injecting the solder paste into the pressurization chamber (210), is an upper surface of the holding and placing unit (400), and is formed in the longitudinal direction of the chamber housing (100);
- a pumping coupler (500) to which
- a pumping through hole (510) in communication with the pressurization chamber (210) is formed on the chamber housing (100),
- a sealed coupling groove (520) is formed on an outside of an inner periphery of the pumping through hole (510), and
- a hinge coupler (530) protrudes next to the sealed coupling groove (520);
- a chamber sealing cover (600) in which
- the chamber sealing cover (600) is formed as a plate in the longitudinal direction of the chamber housing (100) to externally cover the pumping coupler (500),
- a hinge coupling piece (610) hinged to the hinge coupler (530) is formed on the plate to cover the pumping coupler (500) through pivoting movement, and
- a plurality of air injection holes (620) are formed on an outer surface of the plate to supply and discharge compressed air toward the pumping through hole (510) of the pumping coupler (500);
- a pumping pad (700) that
- is airtightly coupled in the sealed coupling groove (520) while blocking the pumping through hole (510) formed in the pumping coupler (500),
- is maintained to be airtightly coupled with the pumping coupler (500) while the chamber sealing cover (600) is pivoted toward the holding and placing unit (400), and
- repeatedly expands and contracts into the pressurization chamber (210) communicating with the pumping through hole (510) by the compressed air supplied and discharged through the plurality of air injection holes (620) to perform pumping to uniformly mix the solder paste supplied in the pressurization chamber (210);
- a side cover (800) that
- is coupled to one of the first and second ends to seal the pressurization chamber (210), and
- in which an air vent (810) is formed in the side cover (800) to discharge air inside the pressurization chamber (210) of the chamber housing (100) and block inflow of external air;
- and a cover holding member (900) that
- is formed in the longitudinal direction and is coupled to the placing horizontal surface (404) to limit the pivoting movement of the chamber sealing cover (600), which pivots toward the holding and placing unit (400), and
- in which a supply through hole (902) that communicates with the solder inlet (406) and that supplies the solder paste is provided;
- wherein a first set includes one of each of the squeegee blade holder, the pumping coupler, the chamber sealing cover, and the pumping pad, on the left side and a second set includes another of each of the squeegee blade holder, the pumping coupler, the chamber sealing cover, and the pumping pad on the right side.