Claims
- 1. A squeegee unit comprising:
a member having a paste pressurizing slope for pressurizing solder paste on a screen mask during printing operation, thereby filling said solder paste into a mask hole; and a squeegee movable in a printing direction along said screen mask, the squeegee having a paste scraping surface for scraping off said solder paste on said screen mask, said paste scraping surface extending at an angle of 90° or more to a surface of the screen mask in the printing direction.
- 2. A squeegee unit according to claim 1, wherein said paste pressurizing slope, squeegee, and surface of the screen mask forms at least a part of a solder paste enclosure.
- 3. A squeegee unit according to claim 1, wherein at least a distal end portion of said squeegee in contact with said screen mask is composed of an elastic material.
- 4. A squeegee unit according to claim 1, wherein said paste pressurizing slope projects from the paste scraping surface of said squeegee in said printing direction.
- 5. A squeegee unit according to claim 1, wherein said member having said paste pressurizing slope is formed having a surface adjoining said paste pressurizing slope and extending along the surface of said screen mask.
- 6. A squeegee unit according to claim 1, which further comprises a paste pressurizing unit having said paste pressurizing slope and a scraping unit having said squeegee, the paste pressurizing unit and the scraping unit being independently movable toward and away from the surface of said screen mask without a gap.
- 7. A squeegee unit according to claim 6, which further comprises a squeegee descent preventing mechanism capable of preventing said scraping unit from descending with respect to said paste pressurizing unit.
- 8. A solder-paste printing machine comprising:
a screen mask having a mask hole; a member having a paste pressurizing slope extending at an angle of 90° or less to a surface of the screen mask in a printing direction; a squeegee movable in a printing direction along said screen mask, the squeegee having a paste scraping surface for scraping off said solder paste on said screen mask; and a drive mechanism for moving the member having said paste pressurizing slope and said squeegee in the printing direction, said paste scraping surface extending at an angle of 90° or more to the surface of the screen mask in the printing direction.
- 9. A solder-paste printing machine according to claim 8, which further comprises a paste pressurizing unit having said paste pressurizing slope and a scraping unit having said squeegee, the paste pressurizing unit and the scraping unit being independently movable toward and away from the surface of said screen mask without a gap, and a support member for restraining the paste pressurizing unit having said paste pressurizing slope from being raised by means of reaction force during a printing operation.
- 10. A solder-paste printing machine according to claim 9, which further comprises an urging member for bringing the scraping unit having said squeegee into contact with the surface of said screen mask at least during a printing operation.
- 11. A solder-paste printing machine according to claim 9, which further comprises a seal member provided between said paste pressurizing unit and the scraping unit.
- 12. A solder-paste printing machine according to claim 9, wherein said paste pressurizing unit comprises a space setting mechanism for adjusting the distance from a surface substantially parallel to the surface of said screen mask to the screen mask.
- 13. A solder-paste printing machine according to claim 9, wherein said paste pressurizing unit comprises an automatic squeegee unit lift mechanism for raising and lowering said support member.
- 14. A solder-paste printing machine according to claim 9, wherein said paste pressurizing unit comprises a pressure sensor for detecting the pressure of said solder paste on said screen mask.
- 15. A squeegee unit comprising:
a first paste pressurizing slope for pressurizing solder paste on a screen mask, thereby filling said solder paste into a mask hole; a second paste pressurizing slope reversely opposed to said first paste pressurizing slope and capable of pressurizing the solder paste on the screen mask, thereby filling said solder paste into the mask hole; a first squeegee movable in a printing direction along said screen mask, the first squeegee having a paste scraping surface for scraping off said solder paste on said screen mask; a second squeegee reversely opposed to said first squeegee and movable in the printing direction along said screen mask, the second squeegee having a paste scraping surface for scraping off said solder paste on said screen mask; and a solder paste enclosure forming a solder paste chamber enclosing the solder paste between the first and second squeegees.
- 16. A squeegee unit according to claim 15, wherein said paste scraping surface of said first squeegee extends at an angle of 90° or more to the surface of the screen mask in the printing direction, and said paste scraping surface of said second squeegee also extends at the angle of 90° or more to the surface of the screen mask in the printing direction.
- 17. A squeegee unit according to claim 15, wherein said solder paste chamber is connected with a solder paste supply mechanism for supplying said solder paste.
- 18. A squeegee unit according to claim 17, wherein at least a part of said solder paste supply mechanism is incorporated in a member having said paste pressurizing slope.
- 19. A squeegee unit according to claim 17, which further comprises a pressure sensor for detecting the pressure of the solder paste in said solder paste chamber so that said solder paste supply mechanism can supply the solder paste to said solder paste chamber in accordance with a signal from said pressure sensor.
- 20. A squeegee unit according to claim 15, which further comprises members formed having said first and second paste pressurizing slopes, individually, and first and second slide holder members provided for vertical movement without leaving gaps with respect to the members, the slide holder members being provided with the first and second squeegees, respectively.
Priority Claims (3)
Number |
Date |
Country |
Kind |
2000-335856 |
Nov 2000 |
JP |
|
2001-115004 |
Apr 2001 |
JP |
|
2001-129039 |
Apr 2001 |
JP |
|
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This is a Continuation Application of PCT Application No. PCT/JP01/09645, filed Nov. 2, 2001, which was not published under PCT Article 21(2) in English.
Continuations (1)
|
Number |
Date |
Country |
Parent |
PCT/JP01/09645 |
Nov 2001 |
US |
Child |
10186457 |
Jun 2002 |
US |