Screen printing apparatus, mask cleaner, and blade

A mask cleaner provided in a screen printing apparatus for printing a paste onto a board through a mask, the mask cleaner being mounted to a moving base that moves in a horizontal paste scraping direction under the mask, wherein the horizontal paste scraping direction corresponds to a first axis, and wherein the mask cleaner moves under the mask integrally with the moving base to scrape off the paste adhering to a lower surface of the mask, the mask cleaner comprising:

• a base body mounted to the moving base and including a longitudinal side corresponding to a second axis, the longitudinal side being horizontal and intersecting the paste scraping direction, and
• a plurality of blades detachably mounted to the base body, extending in a longitudinal direction corresponding to the second axis and arranged side by side in parallel to the paste scraping direction, and causing a paste scraping edge protruding upward from the base body to come into abutment against the lower surface of the mask,
• wherein each of the plurality of blades is formed of resin and comprises opposing edges vertically spaced relative to each other and symmetrical about the second axis such that each of the opposing edges is configured to be mounted to the base body as the paste scraping edge, and
• wherein the base body includes a frame having an opening opened upward and a blade holder that is provided with a plurality of beams mounted in the opening and arranged at intervals in the longitudinal direction, and
• the blade holder holds the plurality of blades, and the plurality of beams support intermediate portions of the blades in the longitudinal direction.

A mask cleaner provided in a screen printing apparatus for printing a paste onto a board through a mask, the mask cleaner being mounted to a moving base that moves in a horizontal paste scraping direction under the mask, wherein the horizontal paste scraping direction corresponds to a first axis, and wherein the mask cleaner moves under the mask integrally with the moving base to scrape off the paste adhering to a lower surface of the mask, the mask cleaner comprising:

• a base body mounted to the moving base and including a longitudinal side corresponding to a second axis, the longitudinal side being horizontal and intersecting the paste scraping direction, and
• a plurality of blades detachably mounted to the base body, extending in a longitudinal direction corresponding to the second axis and arranged side by side in parallel to the paste scraping direction, and causing a paste scraping edge protruding upward from the base body to come into abutment against the lower surface of the mask,
• wherein each of the plurality of blades is formed of resin and comprises opposing edges vertically spaced relative to each other and symmetrical about the second axis such that each of the opposing edges is configured to be mounted to the base body as the paste scraping edge, and
• wherein each of the plurality of blades includes a pair of pressed portions protruding outward in the longitudinal direction from both end portions in the longitudinal direction, and
• the pair of pressed portions included in each of the plurality of blades are pressed by a pair of end members detachably mounted to the base body from above.

A blade for use in a mask cleaner that is provided in a screen printing apparatus for printing a paste onto a board through a mask, wherein the blade is mounted to a moving base that moves in a horizontal paste scraping direction under the mask, wherein the horizontal paste scraping direction corresponds to a first axis,

• wherein the blade moves under the mask integrally with the moving base to scrape off the paste adhering to a lower surface of the mask,
• wherein the blade is formed of resin and is detachably mounted to a base body that is mounted to the moving base and includes:
• a longitudinal side extending in a longitudinal direction corresponding to a second axis, said longitudinal side being horizontal and intersecting the paste scraping direction and, and causes a paste scraping edge protruding upward from the base body to come into abutment against the lower surface of the mask, and wherein the blade comprises opposing edges vertically spaced relative to each other and symmetrical about the second axis such that each of the opposing edges is configured to be mounted to the base body as the paste scraping edge, and
• wherein the blade includes a pair of pressed portions protruding outward in the longitudinal direction from both end portions in the longitudinal direction, wherein the pair of pressed portions are pressed by a pair of end members detachably mounted to the base body from above.

A screen printing apparatus comprising:

• a print head that prints a paste onto a board through a mask,
• a moving base moving under the mask in a horizontal paste scraping direction corresponding to a first axis, and
• a mask cleaner mounted to the moving base and moving under the mask integrally with the moving base to scrape off the paste adhering to a lower surface of the mask,
• wherein the mask cleaner includes:
• a base body mounted to the moving base and including a longitudinal side corresponding to a second axis, the longitudinal side being horizontal and intersecting the paste scraping direction, and
• a plurality of blades detachably mounted to the base body and extending in a longitudinal direction corresponding to the second axis and arranged side by side in parallel to the paste scraping direction, and causing a paste scraping edge protruding upward from the base body to come into abutment against the lower surface of the mask, and
• each of the plurality of blades is formed of resin and comprises opposing edges vertically spaced relative to each other and symmetrical about the second axis such that each of the opposing edges is configured to be mounted to the base body as the paste scraping edge, and
• wherein the base body comprises a frame defining an air passage opening, wherein adjacent blades of the plurality of blades define respective spaces therebetween, and wherein the base body blocks a rear most space of the respective spaces from the air passage opening.

A mask cleaner provided in a screen printing apparatus for printing a paste onto a board through a mask, the mask cleaner being mounted to a moving base that moves in a horizontal paste scraping direction under the mask, wherein the horizontal paste scraping direction corresponds to a first axis, and wherein the mask cleaner moves under the mask integrally with the moving base to scrape off the paste adhering to a lower surface of the mask, the mask cleaner comprising:

• a base body mounted to the moving base and including a longitudinal side corresponding to a second axis, the longitudinal side being horizontal and intersecting the paste scraping direction, and
• a plurality of blades detachably mounted to the base body, extending in a longitudinal direction corresponding to the second axis and arranged side by side in parallel to the paste scraping direction, and causing a paste scraping edge protruding upward from the base body to come into abutment against the lower surface of the mask,
• wherein each of the plurality of blades is formed of resin and comprises opposing edges vertically spaced relative to each other and symmetrical about the second axis such that each of the opposing edges is configured to be mounted to the base body as the paste scraping edge, and
• wherein the base body comprises a frame defining an air passage opening, wherein adjacent blades of the plurality of blades define respective spaces therebetween, and wherein the base body blocks a rear most space of the respective spaces from the air passage opening.