JP2024032468A - Substrate production system - Google Patents

Abstract

To provide a substrate production system that can suppress long-term waiting times in printing processing.SOLUTION: A substrate production system 1 includes a printing device 2 (printing portion) that prints solder on a substrate P, and a component mounting device 5 (work portion) that mounts a component on the substrate P along the conveyance line of the substrate P. The printing device 2 includes a printing communication unit 30 (information acquisition unit) that acquires information regarding the mounting CT (work cycle time) of the component mounting device 5, and a control unit 2B that executes an adjustment process to adjust the printing CT of the printing device 2 according to the mounted CT based on the acquired information.SELECTED DRAWING: Figure 2

Description

The present invention provides a board production system that includes a printing section that prints a coating material such as solder on a substrate such as a printed wiring board, and a working section that performs work such as component mounting processing on the board on which the coating material is printed. Regarding.

Equipped with a printing device (printing section) that prints a coating material such as solder on a substrate such as a printed wiring board, and a component mounting device (work section) that performs component mounting processing on the board on which the coating material is printed. Substrate production systems are known.

A screen printing device is known as a typical printing device. A screen printing device is equipped with a mask that is stacked on a substrate and a squeegee (spatula member) that slides along the top surface of the mask, and the coating material that is supplied to the top surface of the mask is moved by the squeegee to form a part of the mask. The coating material is configured to print onto the substrate through the patterned holes.

The printing quality of the coating material depends on printing conditions such as the moving speed of the squeegee and printing pressure (pressing pressure). These printing conditions differ depending on the combination of the type of coating material and the type of squeegee. Patent Document 1 discloses a screen printing device that allows such settings of printing conditions to be performed with a simpler operation.

Japanese Patent Application Publication No. 2017-149147

In the above-described board production system, when the component mounting device stops due to component replenishment or machine trouble, a waiting time occurs in the printing process of the printing device. The coating material supplied onto the mask gradually dries by being exposed to air, and its viscosity increases. If the viscosity of the coating material increases too much, it may cause printing defects such as blurring, and may also cause failures in energization of mounted components.

Therefore, if the standby time exceeds a certain period of time, rolling processing or test printing may be periodically executed in the printing device. The rolling process is a process in which the coating material is moved back and forth using a squeegee in an area avoiding the pattern holes on the mask in order to suppress an increase in the viscosity of the coating material.

However, rolling processing and test printing are preliminary processing that is not directly connected to substrate production. Therefore, in order to avoid unnecessary consumption of coating material and power consumption, it is desirable to avoid performing this process. In short, it is desirable to be able to suppress the occurrence of long waiting times in print processing, but Patent Document 1 does not mention this point.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a board production system that can suppress the occurrence of long waiting times in printing processing.

In order to solve the above problems, a substrate production system according to one aspect of the present invention includes a printing unit that performs a printing process of printing a coating material on a substrate, and a printing unit that performs a predetermined process on the substrate on which the coating material is printed. a board production system in which a work unit is provided along the conveyance direction of the board, and an information acquisition unit that acquires information regarding a work cycle time, which is the time from loading to unloading of the board in the working unit; a control unit that executes an adjustment process to adjust a printing cycle time, which is the time from loading to unloading of a board in the printing unit, according to the work cycle time based on the information acquired by the information acquisition unit; It is characterized by

In this board production system, when the information acquisition unit acquires information regarding the work cycle time, the control unit adjusts the print cycle time according to the work cycle time. In this case, the print cycle time is adjusted so that the work cycle time and the print cycle time are equal, or the difference between the work cycle time and the print cycle time is within a predetermined range. A balance with the printing cycle time is maintained, and the occurrence of long-term standby time in printing processing in the printing section is suppressed. Therefore, deterioration of the coating material is suppressed, and the frequency of execution of preliminary processes such as rolling treatment and test printing for suppressing deterioration of the coating material is reduced.

In this board production system, the adjustment process is a change in a pre-unloading interval, which is the time from the completion of the printing process to the start of unloading of the board, and/or a change in the transport speed of the board in the printing unit.

According to this configuration, it is possible to adjust the printing cycle time without changing the actual printing processing conditions (such as the moving speed of the squeegee and the printing pressure (pressing pressure)). Therefore, it is possible to adjust the printing cycle time without affecting the printing quality of the substrate.

Further, the board production system described above further includes a calculation unit that calculates a target printing cycle time based on board production plan information before production of the board, and the control unit is configured to calculate the target printing cycle time determined by the calculation unit. and a predetermined reference print cycle time, which is a reference value of the print cycle time, and if there is a difference between the reference cycle time and the target cycle time, the reference print cycle time is It may be configured to perform a process of initializing the pre-unloading interval and/or the transport speed of the substrate so as to be equal to the target cycle time before producing the substrate.

According to this configuration, the balance between the printing cycle time and the mounting cycle time can be more easily maintained than when production of boards is always started at a fixed printing cycle time (standard printing cycle time). Therefore, the occurrence of a long standby time in the printing process in the printing section is further suppressed.

Further, the board production system may further include a board stocking section capable of stocking the boards taken out from the printing section before being carried into the working section. In this case, the information acquisition section further acquires information regarding the number of substrates in stock in the substrate stock section, and the control section performs the adjustment process according to the information regarding the number of substrates acquired by the information acquisition section. Further configured to run.

According to this configuration, when the work cycle time is longer than the printing cycle time, the substrate can be temporarily stocked in the stock section, which causes a long waiting time for printing processing in the printing section. It is suppressed from doing so. Moreover, since the printing cycle time adjustment process is further executed according to the information regarding the number of substrates in stock, it is effectively suppressed that the number of substrates in stock reaches the upper limit and becomes impossible to stock. In other words, the occurrence of a long waiting time in the printing process in the printing section due to the inability to stock is suppressed.

In this case, for example, when the stock number is less than the upper limit of the stock number and exceeds a preset number, the control unit may cause the subsequent print cycle time to be longer than before. The computer is configured to execute the adjustment process.

According to this configuration, when the number of substrates in stock in the substrate stock section reaches a set number (<upper limit), the subsequent printing cycle time becomes longer, and the timing of carrying out the substrates from the printing section is delayed. As a result, stocking of substrates in the substrate stocking section is suppressed.

Further, the board production system further includes an estimating unit that estimates a minimum stock amount required to continuously execute the predetermined processing in the working unit during a predetermined planned stoppage period of the printing unit, If the stock number based on the information acquired by the information acquisition unit is less than the minimum stock number, the control unit causes the minimum stock number of boards to be stored in the board stock unit by the start of the planned suspension period. The adjustment process is configured to be performed so that the storage device is stocked.

According to this configuration, it is possible to reliably stock the minimum number of substrates in the stock section by the start of the planned stop period of the printing section. Therefore, it is possible to suppress or prevent the work unit from stopping during the scheduled stoppage period of the printing unit due to a shortage of stock substrates.

As described above, according to the substrate production system of the present invention, it is possible to effectively suppress the occurrence of a long standby time in the printing process in the printing section.

1 is a block diagram showing an example of a board production system according to the present invention. It is a block diagram showing an example of a printing device in the board production system. FIG. 2 is a schematic side view showing a printing device main body of the printing device. FIG. 2 is a schematic front view showing a substrate conveyance system in the printing apparatus main body. FIG. 3 is an explanatory diagram of the time structure of print cycle time. FIG. 3 is a block diagram showing an example of a management device in the board production system. 3 is a flowchart illustrating an example of print cycle time adjustment processing control in the printing apparatus.

Hereinafter, one preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[Component mounting system configuration]
FIG. 1 is a block diagram showing an example of a board production system according to the present invention. The board production system 1 is a system that produces component mounting boards in which components are mounted on a board such as a printed wiring board. The board production system 1 includes a printing device 2, a print inspection device 3, a board stocker 4, a component mounting device 5, and a management device 6 that controls these in an integrated manner.

The printing device 2 is a device that performs a printing process of printing solder (an example of a coating material) on the lands of a substrate. The print inspection device 3 is a device that performs an inspection process to inspect the printing state of solder printed on a board. The substrate stocker 4 is a device that temporarily stocks substrates that have undergone inspection processing. The component mounting device 5 is a device that performs a mounting process of mounting (mounting) components onto a board on which solder is printed.

The printing device 2, the print inspection device 3, the board stocker 4, and the component mounting device 5 constitute a production line by being connected in this order in a line in the board transport direction, and the boards are transferred to each device in this order. 2 to 5 undergo the processing described above. Although not shown, the production line includes a reflow oven that heats the board that has undergone the mounting process, and a board inspection device that performs the inspection process that inspects the mounting state of components on the board after the heat treatment. A device may also be provided.

The printing device 2, the print inspection device 3, the board stocker 4, and the component mounting device 5 are connected to a management device 6 for data communication.

FIG. 2 is a block diagram showing an example of the printing device 2 in the board production system 1. The printing device 2 includes a device main body 2A, a control section 2B, a print communication section 30, and a storage device 31.

The device main body 2A performs a printing process to print solder on the board P. The print communication unit 30 is an interface for performing data communication with the management device 6, and has a function of inputting and outputting various data and information to and from the management device 6. The control unit 2B controls printing processing by the apparatus main body 2A, and also controls data communication by the print communication unit 30.

FIG. 3 is a schematic side view showing the device main body 2A. In order to clarify the directional relationship, FIGS. 1, 3, and 4, which will be described later, show XYZ rectangular coordinates in which the X direction and the Y direction are the horizontal direction, and the Z direction is the vertical direction. The X direction is the direction in which the substrate P is transported.

The apparatus main body 2A is a screen printing apparatus that prints solder using a mask (screen plate) having pattern holes corresponding to the lands of the substrate P, and the apparatus main body 2A includes a substrate transport unit 10, a mask holding unit 11, It includes a substrate support unit 12, a squeegee unit 16, a cleaning unit 17, and a camera unit 18.

The substrate transport unit 10 has a function of transporting the substrate P in the apparatus main body 2A. In this example, the substrate conveyance unit 10 is a pair of belt-type conveyors that support and convey both ends of the substrate P. As shown in FIG. 4, the substrate transport unit 10 includes three conveyors: an input conveyor 10a, a work conveyor 10b, and an output conveyor 10c. Note that FIG. 4 is a schematic front view showing the substrate transport unit 10.

The carry-in conveyor 10a, the work conveyor 10b, and the carry-out conveyor 10c are arranged in this order from the upstream side along the conveyance direction (X direction) of the substrate P. The carry-in conveyor 10a carries the substrate P before printing processing into the machine, and the work conveyor 10b receives the substrate P from the carrying-in conveyor 10a and places it at a predetermined printing work position, and also transfers the substrate P after printing processing to the carrying-out conveyor. Hand it over to 10c. The carry-out conveyor 10c carries the printed substrate P out of the machine (print inspection device 3).

Returning to FIG. 3, the mask holding unit 11 is arranged above the substrate transport unit 10. The mask holding unit 11 includes a mask 113 and a clamp member 111 that holds the mask. The mask 113 is arranged in parallel along the XY plane by clamping the frame 112 provided on the periphery thereof by the clamp member 111.

The substrate support unit 12 is a unit that positions the substrate P with respect to the mask 113, and is arranged below the mask holding unit 11. The substrate support unit 12 includes a substrate support section 13 , a movable table 14 , and a table drive mechanism 15 .

The substrate support section 13 is assembled to the movable table 14 together with the work conveyor 10b. The substrate support section 13 includes an elevating table 131 on which a plurality of backup pins 133 are erected, and a slide column 132 that supports the elevating table 131 so that it can move up and down relative to the movable table 14.

The elevating table 131 is moved up and down relative to the movable table 14 by the driving force of a motor or the like. By raising and lowering the lifting table 131, the substrate P is transferred between the work conveyor 10b and the backup pins 133. For example, when the elevating table 131 rises from the home position, the substrate P is lifted from the work conveyor 10b by the backup pins 133. As a result, the substrate P is transferred from the work conveyor 10b to the backup pin 133.

The substrate support section 13 includes a pair of clamp plates 134. The pair of clamp plates 134 are arranged above the work conveyor 10b with an interval in the Y direction, and are moved between an approach position and a separation position by a driving force of an air cylinder or the like. By moving the clamp plate 134 to the approach position, the substrate P lifted from the work conveyor 10b by the backup pins 133 is horizontally clamped from both sides in the Y direction. At this time, the upper surface of the substrate P and the upper surface of each clamp plate 134 are flush with each other.

The table drive mechanism 15 includes a Y-axis table 151 installed on the base of the apparatus main body 2A, an X-axis table 152 installed on the top surface of the Y-axis table 151, and an R-axis table 152 installed on the top surface of the X-axis table 152. It includes an axis table 153 and a slide support 154 that supports the movable table 14 so as to be movable up and down relative to the R axis table 153. The Y-axis table 151, the X-axis table 152, the R-axis table 153, and the movable table 14 are each moved in a predetermined direction by the driving force of a motor or the like. Specifically, the Y-axis table 151 moves in the Y direction with respect to the base of the apparatus main body 2A, and the X-axis table 152 moves in the X direction with respect to the Y-axis table 151. Further, the R-axis table 153 moves in the R direction (rotation direction centered on an axis parallel to the Z direction) with respect to the X-axis table 152, and the movable table 14 moves up and down with respect to the R-axis table 153.

In other words, the table drive mechanism 15 moves the work conveyor 10b and the substrate support section 13 assembled to the movable table 14 in the X, Y, Z, and R directions, and moves the substrate P ( The substrate P) clamped by the clamp plate 134 is brought into contact with the lower surface of the mask 113. Thereby, the substrate P is superimposed on the mask 113.

The squeegee unit 16 is arranged above the mask holding unit 11. The squeegee unit 16 includes a squeegee head 161 and a squeegee 162 supported by the squeegee head 161.

The squeegee head 161 moves horizontally in the Y direction by the driving force of a motor or the like, and also moves up and down with respect to the mask 113 (mask holding unit 11). The squeegee 162 is a plate-shaped spatula member extending in the X direction, and is supported so as to be swingable relative to the squeegee head 161 about an axis parallel to the X direction. The squeegee 162 swings relative to the squeegee head 161 by the driving force of a motor or the like. The squeegee 162 is brought into contact with the upper surface of the mask 113 at a predetermined angle (attack angle) and impression pressure (pressing pressure), and moves together with the squeegee head 161 along the mask 113 at a predetermined speed (squeegee speed). Thereby, the solder S is printed on the substrate P through the pattern holes while moving along the upper surface of the mask 113.

The cleaning unit 17 is arranged directly below the mask 113. The cleaning unit 17 moves in the Y direction along the lower surface of the mask 113 by the driving force of a motor or the like. The cleaning unit 17 has a cleaning head 171, and moves while pressing the gauze provided in the cleaning unit 17 against the lower surface of the mask 113. This cleans the mask 113. At this time, the cleaning unit 17 can selectively perform wet cleaning in which the mask 113 is cleaned by impregnating gauze with a solvent, and dry cleaning in which the mask 113 is cleaned without impregnating it with a solvent.

The camera unit 18 is a unit that images marks attached to the upper surface of the substrate P supported by the backup pins 133 and the lower surface of the mask 113, respectively. Based on these mark images, the positions of the mask 113 and the substrate P are recognized.

The camera unit 18 includes cameras on both upper and lower sides. Similar to the cleaning unit 17, the camera unit 18 is arranged directly under the mask 113, and moves between the substrate P before being superimposed on the mask 113 and the lower surface of the mask 113 in the Y direction using a driving force such as a motor. Moving. In this way, each mark is imaged.

The operation of printing processing in the apparatus main body 2A (printing apparatus 2) is as follows. First, with the elevating table 131 placed at the lower end, the substrate P is carried into the machine by the substrate transport unit 10 (conveyors 10a, 10b) and placed at a printing work position. Next, the elevating table 131 rises, and the substrate P is transferred from the substrate transport unit 10 (work conveyor 10b) to the substrate support section 13 (backup pins 133), and further the substrate P is clamped by the clamp plate 134.

When the substrate P is clamped, the camera unit 18 moves from a predetermined retracted position between the mask 113 and the substrate P, and each mark on the mask 113 and the substrate P is imaged. Based on these mark images, the positions of the mask 113 and the substrate P are recognized.

Thereafter, the camera unit 18 is reset to the retracted position, and the table drive mechanism 15 is operated so that the substrate P supported by the substrate support section 13 is superimposed on the lower surface of the mask 113. At this time, the position of the substrate support part 13 is adjusted in the X, Y, and R directions based on the position recognition results of the mask 113 and the substrate P. With this adjustment, the substrate P is superimposed on the mask 113 at a predetermined position without deviation.

When the substrate P is superimposed on the mask 113, the squeegee unit 16 is placed at a predetermined movement start position. By lowering the squeegee head 161 in this position, the squeegee 162 is pressed against the upper surface of the mask 113 at a predetermined angle (attack angle) and impression pressure (pressing pressure), and in this state, the squeegee 162 and the squeegee head 161 Move in the Y direction at a predetermined speed (squeegee speed). With this movement, the solder S is printed on the substrate P through the pattern holes.

When the squeegee unit 16 moves to the movement end position, the substrate support 13 is reset to its original position by the operation of the table drive mechanism 15, and the substrate P is released from the mask 113. Thereafter, the clamping of the substrate P by the clamp plate 134 is released, and the elevating table 131 is lowered, so that the substrate P is transferred from the substrate support part 13 (backup pin 133) to the substrate transport unit 10 (10b). Then, the substrate P is carried out of the machine from the substrate transport unit 10 (10b, 10c). This completes a series of printing processes in the apparatus main body 2A.

Note that when the printing process is executed on a preset number of substrates P, the cleaning unit 17 moves back and forth along the lower surface of the mask 113 at the timing when the substrates P are released from the mask 113. As a result, the mask 113 is cleaned.

Returning to FIG. 2, the control unit 2B and the storage device 31 will be explained.

The control unit 2B includes a CPU (Central Processing Unit), a ROM (Read Only Memory) that stores a control program, a RAM (Random Access Memory) that is used as a work area for the CPU, and the like. The control unit 2B controls the operation of each component of the apparatus main body 2A, and also controls the data communication operation of the print communication unit 30, by the CPU executing a control program stored in the ROM.

The control section 2B includes a calculation processing section 20, a substrate transport control section 21, a squeegee control section 22, a substrate support control section 23, a cleaning control section 24, an imaging control section 25, and a communication control section 26 as main functional components.

The arithmetic processing unit 20 executes various arithmetic processes and determination processes associated with a series of print processing operations performed by the apparatus main body 2A. The substrate transport control section 21 controls the transport operation of the substrate P by the substrate transport unit 10 (conveyors 10a to 10c). The squeegee control unit 22 controls the operation of the printing process by the squeegee unit 16. The substrate support control section 23 controls the operation of supporting the substrate P by the substrate support unit 12. The cleaning control section 24 controls the cleaning operation of the mask 113 by the cleaning unit 17. The image capture control section 25 controls the image capture operation of the mark by the camera unit 18. The communication control section 26 controls data communication between the printing device 2 and the management device 6 by controlling the print communication section 30 .

The storage device 31 stores various information that is referred to when controlling each part in the device main body 2A. The various information includes substrate data D11, printing condition information D12, printing CT adjustment information D13, cleaning information D14, setup information D15, preliminary processing information D16, and the like.

The board data D11 is information regarding the board P to be produced (component mounting board), and includes the type (ID) of the board P to be produced, the printing position (coordinates of pads and lands) on the board P of each type, and the printing process. It includes information such as the type (ID) of the mask 113 used.

The printing condition information D12 includes information such as the attack angle of the squeegee 162, printing pressure (pressing pressure), and moving speed (squeegee speed) during printing processing. The squeegee control section 22 controls the operation of the printing process by the squeegee unit 16 based on the printing condition information D12.

The print CT adjustment information D13 is information for controlling the cycle time of print processing (referred to as print CT) in the apparatus main body 2A.

Here, as shown in FIG. 4, the printing CT is a process in which the rear end of the substrate P is detected by the loading sensor 101 placed at the loading port of the device main body 2A, and then the printed CT is placed at the loading port of the device main body 2A. The time until the rear end of the substrate P is detected by the carry-out sensor 102, that is, the time required for one board P to be carried into the apparatus main body 2A, after the printing process is executed by the squeegee unit 16, to be carried out from the apparatus main body 2A. This is the time until the

Specifically, as shown in FIG. 5, the printing CT is defined by the total time of "substrate transport time T1," "print processing time T2," and "pre-carryout interval T3."

"Substrate transport time T1" is the time required for the board P to be carried into the machine and placed at the printing work position by the board transport unit 10, and the time required for the board P placed at the print work position to be carried out of the machine. This is the total value of the time required for

"Printing processing time T2" is a period in which the substrate P carried into the printing work position (on the work conveyor 10b) is superimposed on the mask 113 by the substrate support unit 12, and is released from the mask 113 after printing processing by the squeegee unit 16. This is the time until it is returned onto the work conveyor 10b. This "printing processing time T2" is affected by the size of the substrate P and printing conditions, and therefore varies somewhat depending on the type of substrate P.

“Pre-carryout interval T3” is a waiting time (pre-carryout waiting time) from the time when the printing process is completed, that is, the time when the substrate P is returned onto the work conveyor 10b, to the time when the substrate P starts to be carried out.

The printing CT adjustment information D13 includes a reference value of printing CT data for each type of substrate P (referred to as "reference printing CT data"), a reference value of the transport speed of the board P (referred to as "reference transport speed data"), The reference value of the pre-carryout interval ("standard pre-carryout interval data") is included, and the substrate transport control section 21 controls the substrate transport unit 10 based on this print CT adjustment information D13. Note that the reference print CT data is set based on the reference transport speed data and the reference pre-export interval data.

The cleaning information D14 is information that determines the cleaning time and cleaning type (dry type, wet type) for each type (ID) of the mask 113, and the cleaning time is determined based on, for example, the number of substrates P processed (the number of printing processes). stipulated. The cleaning control unit 24 executes the cleaning process for the mask 113 by controlling the squeegee unit 16 based on this cleaning information D14.

The setup information D15 includes information regarding the types and amounts of consumables such as solder used in printing processes and gauze and solvents used in cleaning processes, and the amount of consumables consumed per print process or cleaning process. Contains information.

It is necessary to replenish these consumables at an appropriate timing, and the arithmetic processing unit 20 determines the replenishment time of the consumables (i.e., the setup work) based on this setup information D15 and production plan information D21, which will be described later. (start time). Further, the arithmetic processing unit 20 executes a process of calculating the minimum number of stocks that should be stocked in the substrate stocker 4 by the start time (time point) of the setup work. The "minimum stock quantity" refers to the number of units in stock in order for the component mounting apparatus 5 to continuously perform component mounting processing during the period when the printing apparatus 2 is stopped due to setup work (corresponding to the "planned suspension period" of the present invention). This is the number of substrates P that needs to be stocked in the substrate stocker 4.

The preliminary processing information D16 is information that defines the conditions for executing the rolling process. The rolling process is a process in which the solder is reciprocated using the squeegee 162 within an area avoiding the pattern holes on the mask 113 in order to suppress an increase in the viscosity of the solder.

The execution condition of the rolling process is defined by the waiting time of the printing process, that is, the waiting time from the time when the squeegee unit 16 finishes printing the preceding board P to the time when the squeegee unit 16 starts printing the succeeding board P. When this waiting time reaches the time set as the execution condition, the squeegee control section 22 controls the squeegee unit 16 to execute the rolling process.

Note that the rolling process is a preliminary process that is not directly connected to the production of the substrate P, and involves unnecessary power consumption, so it is desirable to avoid performing it as much as possible. On the other hand, the waiting time of the printing process as described above refers to the progress of the component mounting process in the component mounting device 5, which is arranged downstream of the printing device 2, and especially the cycle time of the component mounting process due to machine trouble, etc. (referred to as mounting CT) or the stock status of the substrates P in the substrate stocker 4.

Therefore, in this printing apparatus 2, in order to suppress the waiting time from occurring in the printing process by the squeegee unit 16, printing is performed according to the mounting CT of the component mounting apparatus 5 and the stock status of the boards P in the board stocker 4. An adjustment process (print CT adjustment process) for adjusting the print CT of the apparatus 2 is executed. This adjustment process will be detailed later.

Next, the configuration of the management device 6 will be explained. The management device 6 includes, for example, a personal computer connected to each of the devices 2 to 5 for data communication. FIG. 6 is a block diagram showing the configuration of the management device 6. As shown in FIG. The management device 6 includes a control section 60, a management communication section 61, and a storage section 62.

The management communication unit 61 is an interface for performing data communication with each of the devices 2 to 5. The management communication unit 61 acquires management data D22 input from each of the devices 2 to 5. For example, the management communication unit 61 may collect historical information such as the printing processing results of each board P by the printing device 2, the inspection results of each board P by the printing inspection device 3, and the component mounting processing results of each board P by the component mounting device 5. Obtain as management data. The management communication unit 61 also stores the cycle time of print inspection processing for each board in the print inspection device 3 (referred to as inspection CT), the mounting CT data for each board in the component mounting device 5, and the stock of boards P in the board stocker 4. The numerical data is acquired as management data D22. Note that the print inspection device 3 and the component mounting device 5 are each equipped with a sensor at the inlet and outlet of the board P, for example similar to the printing device 2, and the inspection CT is performed based on the detection of the board P by these sensors. and the printed CT are detected and transmitted to the management device 6.

The storage unit 62 stores production plan information D21 and management data D22 acquired by the management communication unit 61. The production plan information D21 includes information such as the board name indicating the type of board P scheduled to be produced, the production order of each type of board P, and the number of each type of board P to be produced.

The control unit 60 controls data communication between each of the devices 2 to 5 and the management device 6 by controlling the management communication unit 61.

[Print CT adjustment processing control]
Next, control of the print CT adjustment process in the printing device 2 will be explained. FIG. 7 is a flowchart illustrating an example of print CT adjustment processing control in the printing apparatus 2. As shown in FIG.

When this flowchart starts, the control unit 2B (arithmetic processing unit 20) acquires the production plan information D21 from the management device 6 via the print communication unit 30, and calculates the target printing CT based on this production plan information D21 ( Steps S1, S2). For example, in the case of a production plan to produce 300 substrates P per hour, the target printing CT is 12 seconds (=3600 seconds/300).

Next, the control unit 2B refers to the printing CT adjustment information D13 in the storage device 31, and determines whether the reference printing CT corresponding to the substrate P to be produced is equal to the target printing CT, and if it is not equal, further determines whether reference printing CT>target printing CT or reference printing CT<target printing CT.

If it is determined in the process of step S3 that the reference printing CT=target printing CT, the control unit 2B moves the process to step 6, and sets the speed of "reference transport speed data" (referred to as reference transport speed) to the target transport speed. In addition, the time of "reference pre-export interval data" (referred to as reference pre-export interval) is set as the initial value of the target pre-export interval.

On the other hand, if it is determined in the process of step S3 that the reference printing CT>target printing CT or the reference printing CT<target printing CT, the control unit 2B controls the substrate conveyance speed so that the reference printing CT becomes equal to the target printing CT. Or calculate the interval before unloading. Specifically, when it is determined that the reference printing CT>target printing CT, the control unit 2B calculates a faster speed based on the reference transport speed (step S4), and conversely, if the reference printing CT<target printing If it is determined that it is a printing CT, the control unit 2B calculates a longer interval based on the reference pre-export interval (step S5). After that, the control unit 2B moves the process to step S6.

When proceeding to the process of step S6 through the process of step S4, the control unit 2B sets the speed calculated in the process of step S4 as the initial value of the target conveyance speed, and sets the standard pre-unloading interval to the target pre-unloading interval. Set as the initial value. On the other hand, when proceeding to the process of step S6 after passing through the process of step S5, the control unit 2B sets the reference conveyance speed as the initial value of the target conveyance speed, and sets the interval calculated in the process of step S5 as the target pre-unloading interval. Set as the initial value.

Thereafter, the control section 2B moves the process to step S7, and starts production of the substrate P (the series of print processing operations described above) by controlling each section of the apparatus main body 2A. In this case, the control unit 2B controls the substrate transport unit 10 based on the target transport speed and target pre-export interval (initial value) set in step S6.

When production of the board P is started, the control section 2B acquires information on the mounting CT of the component mounting apparatus 5 from the management device 6 via the printing communication section 30 (step S8). Then, it is determined whether the mounting CT and the printing CT of the printing device 2 are equal or not, and if they are not equal, it is further determined whether the printing CT>the mounting CT or the printing CT<the mounting CT (step S9). . Note that the printing CT of the printing device 2 can be detected based on the detection of the substrate P by the aforementioned carry-in sensor 101 and carry-out sensor 102.

If it is determined in the process of step S9 that the printing CT=the mounting CT, the control unit 2B moves the process to step S12. On the other hand, if it is determined in the process of step S9 that printing CT>mounting CT or printing CT<mounting CT, the control unit 2B adjusts the substrate transport speed or Change the interval before unloading.

Specifically, if it is determined in the process of step S9 that printing CT>mounting CT, the control unit 2B changes the target transport speed so that the transport speed of the substrate P becomes faster (step S10), and vice versa. If it is determined that the printing CT<the mounting CT, the control unit 2B changes the target pre-carryout interval so that the pre-carryout interval becomes longer (step S11).

By executing the processes of steps S9 to S11, the balance between printing CT and mounting CT is maintained.

When proceeding to step S13, the control unit 2B acquires information on the number of substrates P in stock in the substrate stocker 4 via the management device 6 (step S13). Although not shown, the substrate stocker 4 includes, for example, a storage rack including a plurality of storage shelves capable of storing substrates P in a horizontal position. While the boards P are stocked (stored) in this storage rack, the boards P are carried out to the component mounting apparatus 5 in order from the first stocked board P in response to the input of a carry-out request signal from the component mounting apparatus 5. Information on the number of substrates P in stock is sequentially output from the substrate stocker 4 to the management device 6, and the control unit 2B acquires this information on the number of substrates P in stock.

After acquiring the stock number information, the control unit 2B determines whether the stock number of substrates P is equal to or greater than a set number (threshold value) (step S14). Note that the set number is set to, for example, about one-half or two-thirds of the upper limit of the stock number.

If it is determined Yes in the process of step S14, the control unit 2B changes the target pre-carryout interval so that the pre-carryout interval becomes longer (step S15), and moves the process to step S16. That is, the control unit 2B changes the target pre-unloading interval so that the printing CT of the printing device 2 becomes longer, in other words, so that the carry-in pitch of the substrates P in the substrate stocker 4 becomes smaller than the unloading pitch of the substrates P. In this case, the control unit 2B may, for example, lengthen the target pre-carryout interval by a certain period of time, or set the target pre-carryout interval so that the larger the difference is, the longer the interval is, depending on the difference between the stock number and the set number. change. However, the control unit 2B changes the target pre-carryout interval within a range in which the changed target pre-carryout interval does not exceed the set time (standby time) determined by the preliminary processing information D16 (rolling processing execution condition). This is to avoid executing the rolling process due to a change in the target pre-export interval.

By executing the processes of steps S13 to S15, it is possible to prevent the number of substrates stocked in the substrate stocker 4 from reaching the upper limit and becoming unable to stock the substrates.

If the determination in step S14 is No, the control unit 2B skips step S15 and moves the process to step S16. This is because when the number of substrates P in stock is less than or equal to the set number, there is no tendency for the substrate stocker 4 to become unable to stock the substrates.

In step S16, the control unit 2B determines whether the replenishment time of consumables, that is, the setup start time has been calculated (step S16). If the determination is No here, the control unit 2B calculates a setup start time based on the printing condition information D12 and the setup information D15 acquired in the process of step S1 (step S17), and this setup start time is It is determined whether the current time is within a set time (step S18). Here, if the determination is No, the control unit 2B moves the process to step S23. The setup start time determined in step S17 is displayed as an image on a display device (not shown). The operator starts the setup work based on the setup start time displayed in this way.

On the other hand, if it is determined Yes in step S18, that is, if it is determined that the setup start time is within the set time from the current time, the control unit 2B calculates the minimum number of stocks that should be stocked in the substrate stocker 4 by the setup start time. (Step S19), and further obtains information on the number of stocks in the substrate stocker 4 from the management device 6 via the print communication unit 30, and determines whether the number of stocks in the substrate stocker 4 is equal to or greater than the minimum number of stocks (Step S20). ). Note that, as mentioned above, the minimum stock quantity is necessary for the component mounting device 5 to continuously perform component mounting processing while maintaining the current mounting CT during the period when the printing device 2 is stopped due to setup work. This is the number of substrates P in stock.

If it is determined Yes in the process of step S20, that is, if the number of stocks in the substrate stocker 4 is equal to or greater than the minimum number of stocks, the control unit 2B shifts the process to step S23. On the other hand, if it is determined that the stock number is less than the minimum stock number (No in step S20), the control unit 2B controls the number of boards P necessary for stocking the board stocker 4 with the minimum stock number by the setup start time. A target value (target CT) of the printing CT is calculated, and the target transport speed of the substrate P is changed so that the current (actual) printing CT becomes the target CT (step S22). Specifically, the control unit 2B changes the target transport speed of the substrate P so that the transport speed of the substrate P becomes faster. Thereafter, the process moves to step 23.

By executing the processing of steps S17 to S22 as described above by the control unit 2B, the minimum stock number of substrates P is reliably stocked in the substrate stocker 4 by the setup start time.

When the process moves to step S23, the control unit 2B determines whether the printing process for the planned number of substrates P has been completed (step S23), and if the determination is No here, the control unit 2B The unit 2B moves the process to step S8 and repeats the processes of steps S8 to S23 described above. Finally, if the determination in step 23 is YES, the control unit 2B ends the control of the print CT adjustment process.

In the embodiment described above, the printing device 2, the board stocker 4, and the component mounting device 5 correspond to the "printing section", "board stocking section", and "working section" of the present invention. Furthermore, the printing communication section 30 of the printing device 2 corresponds to the "information acquisition section" of the present invention, the arithmetic processing section 20 corresponds to the "arithmetic section" and "estimation section" of the present invention, and the arithmetic processing section 20 and the board The transport control section 21 corresponds to the "control section" of the present invention.

[Effect]
As explained above, the board production system 1 of this embodiment includes a printing device 2 that performs printing processing on a board P, and a component mounting device 5 that performs component mounting processing on a board P on which solder is printed. along the conveyance line. Then, in accordance with the mounting CT of the component mounting apparatus 5, if there is a difference between the mounting CT and the printing CT, the transport speed (target transport speed) of the board P in the printing apparatus 2 is set so that the difference is eliminated. Alternatively, the pre-export interval (target pre-export interval) is changed (processing in steps S8 to S11 in FIG. 7). That is, an adjustment process for adjusting the print CT of the printing device 2 is executed.

Therefore, the balance between the printing CT and the mounting CT is maintained, and in the printing device 2, the occurrence of a long standby time in the printing process by the squeegee unit 16 is suppressed. As a result, deterioration of the solder due to the waiting time is suppressed, and the frequency of execution of the rolling process (preparatory process) for suppressing the deterioration of the solder is reduced.

In particular, as mentioned above, the printing CT adjustment process is realized by changing the conveyance speed of the substrate P or the interval before unloading, and the printing process conditions (attack angle of the squeegee 162, printing pressure (pressing pressure) , movement speed (squeegee speed, etc.) does not change. Therefore, the balance between the printed CT and the mounted CT can be maintained without affecting the printing quality of the board P.

In addition, in the board production system 1 of the embodiment, since the board stocker 4 is interposed between the printing device 2 and the component mounting device 5, even if there is a slight difference between the mounting CT and the printing CT, the board production system 1 The difference is absorbed by stocking P. Therefore, it can be said that the influence on the printing device 2 is small. However, as mentioned above, by executing the printing CT adjustment process and maintaining the balance between the printing CT and the mounting CT, it is possible to secure sufficient storage capacity of the substrate stocker 4. Become. Therefore, when the component mounting apparatus 5 is stopped due to machine trouble or the like, it is possible to more reliably suppress the occurrence of a long standby time in the printing process by the squeegee unit 16.

Furthermore, in the above embodiment, before production of the board P, the target printing CT is determined based on the production plan information D21, and if there is a difference between the target printing CT and the reference printing CT, the reference printing CT is the target printing CT. The transport speed or pre-carryout interval of the substrate P that is equal to CT is calculated, and the calculated speed or interval is set as the initial value of the target transport speed or target pre-carryout interval (steps S1 to 7 in FIG. 7). S5 processing). Therefore, it is possible to maintain a better balance between the printing CT and the mounting CT, compared to the case where the production of the substrate P is always started with a fixed printing CT (that is, the reference printing CT).

Further, in the embodiment described above, the printing CT of the printing device 2 is adjusted according to the number of substrates stocked in the substrate stocker 4. Specifically, as described above, when the number of substrates P in stock exceeds the set number (threshold value), the target pre-unloading interval is changed so that the printing CT of the printing device 2 becomes longer (step S13 in FIG. 7). ~S15). Therefore, it is possible to prevent the number of substrates P in stock from reaching the upper limit and the substrate stocker 4 becoming unable to stock them, and furthermore, to prevent a long waiting time from occurring in the printing process by the squeegee unit 16 in the printing device 2. .

Further, in the embodiment, the minimum stock amount required for continuously executing the component mounting process of the component mounting device 5 during the setup work of the printing device 2 is calculated (estimated) in advance. If the number of substrates stocked in the substrate stocker 4 is less than the minimum stock number, the print CT is adjusted so that the minimum number of substrates P is stocked by the setup start time. Specifically, the target transport speed of the substrate P is changed so that the transport speed of the substrate P becomes faster (steps S17 to S22 in FIG. 7). Therefore, the inconvenience that the component mounting device 5 stops due to a shortage of substrates P carried into the component mounting device 5 during the setup work of the printing device 2 can be prevented.

[Modifications, etc.]
The board production system 1 described above is an example of a preferred embodiment of the present invention, and the specific configuration can be changed without departing from the gist of the present invention. For example, the following configuration can also be adopted.

(1) In the embodiment, the printing CT is adjusted by changing either the transport speed (target transport speed) or the pre-unloading interval (target pre-unloading interval) of the substrate P, but the transport speed and the before unloading Both intervals may be changed.

(2) In the embodiment, as described above, the printing CT is defined by the total time of the substrate transport time T1, the print processing time T2, and the pre-carryout interval (pre-carryout standby time) T3, and The printing CT is adjusted by changing the transport speed (changing the substrate transport time T1) or changing the pre-unloading interval T3.

Here, in the embodiment, the printing processing time T2 is such that the substrate P carried into the printing work position (on the work conveyor 10b) is superimposed on the mask 113 by the substrate support unit 12, and after the printing processing by the squeegee unit 16, the mask 113 is This is the time from when the substrate P is released from the plate to when it is returned onto the work conveyor 10b. However, only the time during which printing is performed on the substrate P by actually operating the squeegee unit 16 may be defined as the printing processing time T2, and the remaining time may be included in the substrate transport time T1. Specifically, the time required for the substrate P at the printing work position to be superimposed on the mask 113, and the time required for the substrate P to be released from the mask 113 and returned onto the work conveyor 10b are referred to as the substrate conveyance time. It may be included in T1.

In other words, the change in the transport speed of the substrate P when adjusting the printing CT is not only the transport speed of the substrate P by the substrate transport unit 10 but also the transport speed of the substrate P by the substrate support unit 12 (the transport speed of the substrate P with respect to the mask 113). The moving speed of the substrate P when superimposing the substrates and releasing the substrates may be further changed. In this case, the arithmetic processing section 20, the substrate transport control section 21, and the substrate support control section 23 function as the "control section" of the present invention.

(3) In the embodiment, the printing device 2 (control unit 2B) calculates the target printing CT based on the production plan information D21 (steps S1 and S2), and also calculates the minimum stock number of the substrate stocker 4. has been done. However, these target printing CT and minimum stock number may be configured to be calculated by the management device 6 (control unit 60). In this case, the control section 60 of the management device 6 functions as the "calculation section" and "estimation section" of the present invention.

(4) In the embodiment, as the "work cycle time" of the present invention, an example has been described in which the adjustment process of the print CT is executed according to the mounting CT of the component mounting apparatus 5. Adjustment processing of the print CT may be executed accordingly. Furthermore, when the board production system 1 includes a plurality of component mounting apparatuses 5, the adjustment process of the printed CT is executed according to the printed CT of each component mounting apparatus 5, or the plurality of component mounting apparatuses 5 are It may also be configured such that the printing CT adjustment process is performed according to the work cycle time of one "work unit".

1 Board production system 2 Printing device 2A Device body 2B Control unit 3 Print inspection device 4 Board stocker 5 Component mounting device 6 Management device 20 Arithmetic processing unit (calculation unit, estimation unit, control unit)
21 Substrate transport control section (control section)
22 Squeegee control unit 23 Substrate support control unit 24 Cleaning control unit 25 Imaging control unit 26 Communication control unit 30 Print communication unit (information acquisition unit)

Claims (6)

The substrate production system includes a printing section that performs a printing process of printing a coating material on a substrate, and a working section that executes a predetermined process on the substrate on which the coating material is printed, along the conveyance direction of the substrate. hand,
an information acquisition unit that acquires information regarding a work cycle time, which is the time from loading to unloading of the board in the working unit;
a control unit that executes an adjustment process to adjust a printing cycle time, which is the time from loading to unloading of a board in the printing unit, according to the work cycle time based on the information acquired by the information acquisition unit; A board production system characterized by: The board production system according to claim 1,
The substrate characterized in that the adjustment process is a change in a pre-unloading interval, which is the time from the completion of the printing process to the start of unloading of the board, and/or a change in the conveyance speed of the board in the printing unit. production system. The board production system according to claim 2,
It is further equipped with a calculation unit that calculates the target printing cycle time based on the board production plan information before board production.
The control unit compares the target print cycle time obtained by the calculation unit with a predetermined reference print cycle time that is a reference value of the print cycle time, and determines the reference cycle time and the target cycle time. If there is a difference between the two, the pre-unloading interval and/or the substrate transport speed may be initialized before production of the substrate so that the reference printing cycle time is equal to the target cycle time. A board production system characterized by: The board production system according to any one of claims 1 to 3,
Further comprising a substrate stocking section capable of stocking the substrates carried out from the printing section before being carried into the working section,
The information acquisition unit further acquires information regarding the number of substrates in stock in the substrate stock unit,
The board production system is characterized in that the control unit further executes the adjustment process according to information regarding the stock number acquired by the information acquisition unit. The board production system according to claim 4,
The control unit performs the adjustment process so that when the stock number is less than the upper limit of the stock number and exceeds a preset number, the subsequent printing cycle time becomes longer than before. A board production system characterized by: The board production system according to claim 4,
further comprising: an estimating unit that estimates a minimum number of stocks that need to be stocked in the substrate stock unit in order to continuously execute the predetermined processing in the working unit during a predetermined planned stoppage period of the printing unit; Prepare,
If the stock number based on the information acquired by the information acquisition unit is less than the minimum stock number, the control unit causes the minimum stock number of boards to be stored in the board stock unit by the start of the planned suspension period. A board production system characterized in that the adjustment process is executed so that the board is stocked.