Board printing apparatus and board printing method

Patent metadata

Field	Value
Publication number	US-9254638-B2
Application number	US-201314109679-A
Country	US
Kind code	B2
Filing date	Dec 17, 2013
Priority date	Dec 19, 2012
Publication date	Feb 9, 2016
Grant date	Feb 9, 2016

Abstract

A board printing apparatus includes a board working table, a first printing table, a second printing table, and a control portion controlling printing operations. The control portion is configured to perform second printing on a board held by the board working table by a large component mask of the second printing table after a first printing performed on the board held by the board working table by a small component mask of the first printing table.

First claim

What is claimed is:

1. A board printing apparatus comprising:
at least one board working table holding a board to be printed on;
a first printing table and a second printing table aligned in a prescribed direction in a horizontal direction above the board working table; and
a control portion controlling printing operations of the first printing table and the second printing table,
the first printing table holding a small component mask having a first thickness configured to perform first printing to print a viscous material on the board,
the second printing table holding a large component mask having a second thickness thicker than the first thickness, formed with a relief portion having a depth larger than the first thickness on a board contact surface to relieve the viscous material printed by the small component mask, and configured to perform second printing to print the viscous material on the board after the first printing performed by the first printing table,
the at least one board working table and at least one of the first printing table and the second printing table are configured to be movable in the prescribed direction in the horizontal direction,
the at least one board working table and at least one of the first printing table and the second printing table being configured to be movable in a vertical direction, and
the control portion being configured to perform the second printing on the board held by the at least one board working table by the large component mask of the second printing table after the first printing performed on the board held by the at least one board working table by the small component mask of the first printing table.

2. The board printing apparatus according to claim 1 , wherein
the control portion is configured to perform a printing preparation operation of one of the first printing table and the second printing table during a board printing operation of the other of the first printing table and the second printing table.

3. The board printing apparatus according to claim 2 , wherein
the first printing table and the second printing table are configured to be movable in the prescribed direction in the horizontal direction, and
the control portion is configured to move the second printing table closer to a printing position by moving the second printing table in the prescribed direction in the horizontal direction such that a distance between the first printing table and the second printing table is reduced in the prescribed direction in the horizontal direction during a board printing operation of the first printing table.

4. The board printing apparatus according to claim 3 , wherein
the control portion is configured to move the second printing table closer to the printing position until an interval between the second printing table and the first printing table becomes an accessible minimum interval without interference during the board printing operation.

5. The board printing apparatus according to claim 4 , wherein
the control portion is configured to locate the second printing table at the printing position by moving the first printing table and the second printing table while keeping a distance equal to or more than the minimum interval when the second printing is performed by the second printing table after the second printing table is moved closer to the printing position.

6. The board printing apparatus according to claim 2 , wherein
the first printing table and the second printing table are configured to be movable in the vertical direction,
the control portion is configured to lower the second printing table from a large component mask plate releasing height position to a standby height position during a board printing operation of the first printing,
the large component mask plate releasing height position is a position of the large component mask separated from the board after the second printing of the viscous material, and
the standby height position is a position lower than the large component mask plate releasing height position and a position where the viscous material on the board is non-contact with the large component mask.

7. The board printing apparatus according to claim 6 , wherein
the standby height position is a height position determined on a basis of at least the first thickness of the small component mask and an amount of deflection of the large component mask.

8. The board printing apparatus according to claim 2 , wherein
the at least one board working table includes a first board working table and a second board working table each configured to be movable in the prescribed direction in the horizontal direction,
each of the first board working table and the second board working table has a mask recognition camera capable of recognizing the small component mask and the large component mask, and
the control portion is configured to perform mask recognition of the large component mask of the second printing table using the second board working table during a board printing operation performed by the first board working table and the first printing table using the small component mask.

9. The board printing apparatus according to claim 8 , wherein
the control portion is configured to perform the mask recognition of the large component mask using the second board working table at least when a board printing operation is first performed by the first board working table and the first printing table.

10. The board printing apparatus according to claim 2 , wherein
the at least one board working table includes a first board working table and a second board working table each configured to be movable in the prescribed direction in the horizontal direction,
each of the first board working table and the second board working table has a cleaning unit configured to clean the small component mask and the large component mask, and
the control portion is configured to perform a mask cleaning operation for the small component mask of the first printing table using the first board working table while the second board working table and the second printing table perform a board printing operation on the board after the first printing using the large component mask.

11. The board printing apparatus according to claim 10 , wherein
the first printing table and the second printing table are configured to be movable in the prescribed direction in the horizontal direction, and
the control portion is configured to move the first printing table in a direction away from the second printing table and perform the mask cleaning operation for the small component mask at a position separated from the second printing table while the second board working table and the second printing table perform the board printing operation.

12. The board printing apparatus according to claim 2 , wherein
the at least one board working table includes a first board working table and a second board working table each configured to be movable in the prescribed direction, and
the control portion is configured to perform at least one of operations of carrying the board into one of the first board working table and the second board working table and carrying the board out of one of the first board working table and the second board working table during a board printing operation performed by one of the first printing table and the second printing table and the other of the first board working table and the second board working table.

13. The board printing apparatus according to claim 1 , wherein
the control portion is configured to perform a board printing operation of the first printing on a second board

Assignees

• Yamaha Motor Co Ltd

Inventors

• Fujimoto Takeshi

Classifications

• H05K3/1225

  Screens or stencils; Holders therefor · CPC title

• B41F15/26

  for articles with flat surfaces · CPC title

• B41F15/36

  flat · CPC title

• H05K2203/1476

  Same or similar kind of process performed in phases, e.g. coarse patterning followed by fine patterning · CPC title

• H05K2203/165

  Stabilizing, e.g. temperature stabilization · CPC title