Screen printing machine

Patent metadata

Field	Value
Publication number	US-9457605-B2
Application number	US-201214123011-A
Country	US
Kind code	B2
Filing date	Feb 6, 2012
Priority date	May 31, 2011
Publication date	Oct 4, 2016
Grant date	Oct 4, 2016

Abstract

An inexpensive small-sized screen printing machine having low redundancy and high production efficiency and applicable to a dual conveying-type component mounting machine. A pair of substrate supporting tables juxtaposed in a specific direction is provided. Screen printing is alternately performed by a single print executing section in a common area which can be shared by the two substrate supporting tables. In doing so, when one substrate supporting table located at a print position among the pair of substrate supporting tables starts exiting the print position, the other substrate supporting table starts entry to the print position.

First claim

The invention claimed is:

1. A screen printing machine comprising:
a pair of substrate supporting tables including one substrate supporting table and a counterpart substrate supporting table, each of the pair of substrate supporting tables being provided for holding a substrate that is a print object, the substrate supporting tables being juxtaposed along a specific direction, the specific direction being horizontally perpendicular to a conveying direction of the substrate;
a printing executing section that performs a printing process on the substrate held by each of the substrate supporting tables, the printing process being performed at a print position set in a common area being located between the pair of substrate supporting tables with respect to the specific direction along which both of the substrate supporting tables are movable;
a substrate supporting table driving mechanism configured to individually drive the pair of substrate supporting tables in the specific direction; and
a control unit configured to control the substrate supporting table driving mechanism so that the one substrate supporting table that moves into a printing process enters the print position by moving in a direction approaching the counterpart substrate supporting table along the specific direction during movement of the counterpart substrate supporting table that has completed the printing process at the print position as the counterpart substrate supporting table is exiting the print position by moving in a direction receding along the specific direction,
wherein
the control unit controls the substrate supporting table driving mechanism so that the one substrate supporting table completes entry to the print position after the counterpart substrate supporting table completes exiting from the print position, in a way that at least parts of an exit period for the one counterpart substrate supporting table exiting the print position and an entry period for the one substrate supporting table entering the print position overlap each other.

2. The screen printing machine according to claim 1 ,
wherein the control unit controls the substrate supporting table driving mechanism so that, during the time after carrying out a printed substrate and before moving into a next printing process, the one substrate supporting table which has exited the print position approaches the counterpart substrate supporting table located at the print position by an interference limit set in advance.

3. The screen printing machine according to claim 2 ,
wherein the control unit includes:
an interference avoidance necessity judging unit configured to judge whether or not it is necessary to avoid interference between the substrate supporting table entering the print position, and the substrate supporting table exiting the print position; and
a regulating section configured to regulate interference between the two substrate supporting tables when the interference avoidance necessity judging section judges that interference avoidance is necessary.

4. The screen printing machine according to claim 3 ,
wherein the regulating section determines a movement velocity of the substrate supporting table entering the print position according to a difference between a movement velocity of the substrate supporting table entering the print position, and a movement velocity of the substrate supporting table exiting the print position.

5. The screen printing machine according to claim 4 ,
wherein the regulating section determines the movement velocity of the substrate supporting table entering the print position according to an opposing interval between the substrate supporting table entering the print position, and the substrate supporting table exiting the print position.

6. The screen printing machine according to claim 3 ,
wherein the regulating section computes an exit time period from the start of exit of the substrate supporting table that has finished the printing process until moving to a position where interference is avoidable, and an entry time period from the start of entry of the substrate supporting table that moves into a next printing process until moving to a position where interference may occur, thereby starting movement of the substrate supporting table entering the print position when a difference between the exit time period and the entry time period has lapsed.

7. The screen printing machine according to claim 1 ,
wherein the control unit includes:
an interference avoidance necessity judging section configured to judge whether or not it is necessary to avoid interference between the substrate supporting table entering the print position, and the substrate supporting table exiting the print position; and
a regulating section configured to regulate interference between the two substrate supporting tables when the interference avoidance necessity judging section judges that interference avoidance is necessary.

8. The screen printing machine according to claim 7 ,
wherein the regulating section determines a movement velocity of the substrate supporting table entering the print position according to a difference between a movement velocity of the substrate supporting table entering the print position, and a movement velocity of the substrate supporting table exiting the print position.

9. The screen printing machine according to claim 8 ,
wherein the regulating section determines the movement velocity of the substrate supporting table entering the print position according to an opposing interval between the substrate supporting table entering the print position, and the substrate supporting table exiting the print position.

10. The screen printing machine according to claim 7 ,
wherein the regulating section computes an exit time period from the start of exit of the substrate supporting table that has finished the printing process until moving to a position where interference is avoidable, and an entry time period from the start of entry of the substrate supporting table that moves into a next printing process until moving to a position where interference may occur, thereby starting movement of the substrate supporting table entering the print position when a difference between the exit time period and the entry time period has lapsed.

11. The screen printing machine according to claim 7 ,
where the interference avoidance necessity judging section executes a step whether or not the substrate supporting table that is exiting exists within an area at which interference may occur, and if the interference avoidance necessity judging section made a judgment that substrate supporting table that is exiting exists within an area at which interference may occur, the interference avoidance necessity judging section is configured to execute a step of obtaining exit velocity of the substrate supporting table that is exiting and entry velocity of the substrate supporting table that is entering to the print position, and a step of comparing the exit velocity and the entry velocity, and
the interference avoidance necessity judging section is configured to make judgment that the interference avoidance is necessary if the entry velocity is faster than the exit velocity, and the interference avoidance necessity judging section is configured to make judgment that the interference avoidance is unnecessary if the entry velocity is at most the exit velocity.

12. The screen printing machine according to claim 11 ,
wherein the interference avoidance necessity judging section configured to execute a step of obtaining a current position of the substrate supporting table exiting from the print position, and an area judgment step

Assignees

• Miyake Yasushi
• Fujimoto Takeshi
• Yamaha Motor Co Ltd

Inventors

• Miyake Yasushi
• Fujimoto Takeshi

Classifications

• B41F15/0881

  for printing on polyhedral articles · CPC title

• B41P2215/50

  Screen printing machines for particular purposes · CPC title

• B41L21/02 Primary

  for conveying sheets · CPC title

• H05K3/1233 Primary

  Methods or means for supplying the conductive material and for forcing it through the screen or stencil · CPC title

• H05K3/3484

  Electricity · mapped topic