JPH09300582A - Method for screen replacement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with the necessity to assign screens stored in a stocker and thereby reduce manhours for operation by automatically replacing the screen in referance to data stored in a means for storing screen information in a stocker of the screen, when an NC program is selected anew. SOLUTION: When continuously producing different types of a product 1, an NC program to be used for production is previously registered with plural machines. Then the production is initiated at the start 2. When continuing the production 4, the machines automatically select the NC program to be used for the following production from among plural NC programs which are previously registered 5. Further, a desired screen is assigned to an automatic screen replacement device 6, based on the stocker number recorded in a screen data part, referring to the structural data of the NC program selected by the machine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen replacement method for a screen printing machine of an electronic component mounting machine.

[0002]

2. Description of the Related Art A conventional screen exchanging method for a screen printing machine will be described with reference to FIGS. FIG. 3 is a schematic diagram showing a portion related to screen exchange of a screen printing machine and an automatic screen exchange device. The screen 2 in the printer body 1 is fixed and released by the screen fixing / releasing unit 3. Automatic screen changer 4
In order to store the screen in the desired stocker section 5, and the desired screen in the stocker section 5,
Since the paper is supplied into the printer main body 1, the lifter unit 6 moves up and down to position the stocker unit 5. The screen transport unit 7 is a unit that transports the screen 2 from the printing machine body 1 to the screen automatic exchange device 4 or from the screen automatic exchange device 4 to the printing machine body 1.

FIG. 4 is a flow chart for explaining a screen replacement method of a printing machine having an automatic screen replacement device. It will start in # 2 and will start production in # 3. When continuing production in # 4, the machine is temporarily stopped in # 21. The stop of the machine is to specify the screen corresponding to the NC program selected by the operator in # 23 from the stocker. In # 22, the operator selects the NC program to be used in the next production. # 23
Then, a screen corresponding to the NC program selected by the operator is specified from the stocker. In # 7, the machine releases the screen fixing section to remove the screen, and in # 8, the lifter section of the automatic screen changer moves up and down to store the finished screen, and the empty space to store the screen is released. Position the stocker. next,#
At 9, the screen is stored in the stocker section. In # 10, the descriptor unit moves up and down to take out the screen from the stocker in which the designated screen is stored, and the desired screen is positioned in the stocker. In # 11, the screen is transported to the printing machine main body,
At 12, the screen is fixed. The following returns to # 3 and repeats the same process. If the production is not continued at # 4, the production ends at # 13.

Next, the data structure of the NC program of the conventional screen printer will be described. FIG. 5 shows the data structure of the NC program of the conventional screen printing machine.
The header # 14 records the name of the NC program, the date when the NC program was created, and the like. The program offset portion of # 15 is a coordinate system on the machine and is information for relatively converting the coordinates of the NC program. # 16 NC
The data section records coordinate values for aligning the substrate with the screen. The mark land data part of # 17 records the coordinate value of the board mark and the information of the board mark to be used, and the screen mark data part of # 18 records the coordinate value of the screen mark and the information of the screen mark to be used. . By the way, the printed circuit boards vary from one board to another. The correction data section of # 19 is a data section for performing the recognition correction from the coordinate value of the board mark of # 17 and the coordinate value of the screen mark of # 18 to accurately position the screen pattern and the board pattern.

[0005]

In the conventional screen exchange method, when exchanging the screen, it is necessary for the worker to specify the number of stages of the stocker to use the screen. Was being lost. Further, when a plurality of models are continuously produced, the machine has to be stopped once each time the model is switched, which causes a problem that the productivity of the printing press is reduced.

[0006]

In order to solve the above problems, a screen printing method of the present invention is a screen replacement method in a screen printing machine having an automatic screen replacement device, and is an NC program used in advance for production. To store in the machine, to store screen information in the stocker of the screen corresponding to the NC program to be used, and to store it in the stocker in association with the NC program being selected at the time of automatic screen exchange. It is characterized in that it comprises means for automatically designating a screen. When a new NC program is selected, the screen is automatically exchanged by referring to the data in the screen information storage means.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is a screen replacement method in a screen printing machine having an automatic screen replacement device, and means for storing an NC program used for production in advance in the machine. When,
It consists of a means to store the screen information in the stocker of the screen corresponding to the NC program to be used, and a means to automatically specify the screen stored in the stocker in conjunction with the NC program being selected at the time of automatic screen exchange. It is characterized by that.

The invention according to claim 2 is characterized in that the means for storing the screen information stores the stocker number in which the stocker is stored and the screen size. According to the present invention, it is possible to eliminate the need for the operator to specify which stage of the stocker the screen used is stored when the screen is replaced.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
~ It demonstrates with reference to FIG. The configuration of the screen exchange device of the present invention is similar to that of FIG. 3, and the description thereof is omitted. FIG. 1 is a flowchart for explaining a screen replacement method for a printing machine having an automatic screen replacement device. First, in the case of continuously producing a plurality of models in # 1, an NC program used for production is registered in advance in a plurality of machines. It will start in # 2 and will start production in # 3. To continue production in # 4, in # 5,
In # 1, the machine automatically selects the NC program to be used for the next production from the plurality of NC programs registered in advance. Therefore, although the machine was once stopped by the conventional screen exchange method, the present invention does not require stopping the machine. In # 6, the machine selected N
With reference to the data structure of the C program, a desired screen is designated from the stocker number recorded in the screen data section. Since # 7 to # 13 are the same as the conventional method of FIG. 4, the description thereof will be omitted.

FIG. 2 shows the data structure of the NC program of the screen printing machine. # 14 to # 19 are the same as the data structure of the conventional NC program shown in FIG. In the present invention, in addition to the data structure of the conventional NC program, the stocker number indicating at which stage in the stocker of the automatic screen changing device the screen corresponding to the NC program is stored at # 20. , Screen information such as screen size is recorded. Therefore, the screen stored in the stocker of the screen automatic exchange device can be automatically loaded into the printing machine main body in synchronization with the selected NC program.

However, the data relating to the screen data portion of the NC program must be registered in advance when the NC program is created.

[0012]

According to the present invention, unlike the conventional screen exchanging method, it is not necessary for the operator to specify the number of stages of the stocker to use the screen when exchanging the screen. The man-hour can be reduced. Also,
According to the present invention, when a plurality of models are continuously produced, the stocker number is registered in advance in the screen data section of the NC program when the NC program is created, so that the above work is not required when the models are switched. Therefore, the productivity of the printing press is improved because it is not necessary to stop the machine.

[Brief description of drawings]

FIG. 1 is a flowchart for explaining an automatic screen exchange method according to an embodiment of the present invention.

FIG. 2 is a data structure of an NC program of the screen printing machine according to the embodiment of the present invention.

FIG. 3 is a configuration diagram for explaining a screen exchange method of the screen printing machine.

FIG. 4 is a flowchart for explaining a conventional screen automatic exchange method.

FIG. 5 is a data structure of an NC program of a conventional screen printing machine.

[Explanation of symbols]

 1 Printer Main Body 2 Screen 3 Screen Fixing / Unlocking Part 4 Automatic Screen Changer 5 Stocker Part 6 Lifter Part 7 Screen Conveying Part

Claims (2)

[Claims] 1. A screen replacement method for a screen printing machine having an automatic screen replacement device, comprising means for storing an NC program used in production in advance in a machine and a screen stocker corresponding to the NC program used. A screen exchanging method comprising means for storing screen information and means for automatically designating a screen stored in a stocker in association with an NC program being selected when the screen is automatically exchanged. 2. The screen exchange method according to claim 1, wherein the means for storing the screen information stores a stocker number in which the stocker is stored and a screen size.