WO2014033824A1

WO2014033824A1 - Solder printing machine

Info

Publication number: WO2014033824A1
Application number: PCT/JP2012/071635
Authority: WO
Inventors: 加藤　光昭
Original assignee: 富士機械製造株式会社
Priority date: 2012-08-28
Filing date: 2012-08-28
Publication date: 2014-03-06
Also published as: JP5938102B2; JPWO2014033824A1

Abstract

A solder printing machine is configured to: determine whether a solder paste has been additionally supplied, on the basis of results from a solder-quantity detector (50) provided therein (76); and when determined that the solder paste was additionally supplied, verify the appropriateness of the additionally supplied solder paste, on the basis of information (80) about the type of solder which should be supplied, and information (78) acquired by the solder printing machine itself and used for verifying the type of solder paste actually supplied (82). Consequently, even for solder printing machines for which the operator performs the supply of solder paste manually, it is possible for the printing machine itself to verify whether a solder paste has actually been additionally supplied, and verify whether the additionally supplied solder paste is appropriate. As a result, it is possible to improve the utility of solder printing machines.

Description

Solder printing machine

The present invention relates to a solder printer that prints cream solder on a substrate or the like.

The electrical circuit is roughly manufactured by mounting electrical components on a substrate such as a printed wiring board. At that time, in order to fix the electrical component to the substrate in a state where electrical connection is ensured, cream solder (solder paste) is printed on the substrate in a pattern corresponding to the electrical circuit prior to mounting. A solder printer is used, for example, in the printing. Printing with a solder printer is generally performed by bringing a substrate into close contact with the lower surface of a screen (mask) in which small openings corresponding to the solder printing pattern are formed, and then applying squeegee to the screen while cream solder is supplied on the screen. Is done by moving along. Examples of solder printers that perform such printing include those described in the following patent documents, and the solder printer can detect the amount of solder supplied on the screen. Yes.

JP 2008-74054 A

Problems to be Solved by the Invention

Detecting the amount of solder supplied on the screen is meaningful in printing operations. The present inventor has obtained knowledge that, in a solder printer equipped with a solder amount detector, the utility of the solder printer can be improved by using the amount of solder detected by the solder amount detector. . The present invention is based on the knowledge, and an object thereof is to provide a highly practical solder printer.

In order to solve the above problems, the solder printing machine of the present invention determines whether or not cream solder has been additionally supplied based on the result of the solder amount detector provided therein, and has determined that cream solder has been additionally supplied. The appropriateness of the additionally supplied cream solder based on the information about the type of solder to be supplied and the information obtained by itself, that is, the information for recognizing the type of cream solder actually supplied Configured to certify.

According to the solder printer of the present invention, for example, even if the solder printer is such that the supply of cream solder is performed manually by the operator, the printer itself has actually supplied additional cream solder. It is also possible to recognize whether or not the additionally supplied cream solder is appropriate. Since such recognition is possible, the solder printer of the present invention is highly practical.

It is a perspective view which shows the external appearance of the solder printer of an Example. It is a perspective view which shows the internal structure of the solder printer of an Example. It is a schematic diagram for demonstrating the measurement of the diameter of the solder roll which exists in the solder printer of an Example, and the solder roll. It is a flowchart which shows the solder additional supply management program performed in the control apparatus of the solder printer of an Example. It is a block diagram which shows the function structure of the control apparatus implement | achieved by the solder additional supply management program of FIG. It is a figure which shows a mode that the barcode attached to the container in which cream solder is accommodated is read with a barcode reader.

Hereinafter, typical embodiments of the present invention will be described in detail with reference to the drawings as examples. In addition, the solder printer of this invention is not limited to the following Example, It can be set as the thing of the various aspect which gave various change and improvement based on the knowledge of those skilled in the art.

≪Hardware configuration and printing operation of solder printing machine≫
The solder printer of the embodiment whose appearance is shown in FIG. 1 (hereinafter sometimes simply referred to as “printer”) is cream solder (hereinafter simply referred to as “solder”) in a predetermined pattern on a substrate such as a printed wiring board. For example, it is arranged on an electric circuit production line. FIG. 2 shows a state in which the exterior panel constituting the housing of the printing press is removed, that is, the internal structure of the printing press.

As can be seen from FIG. 2, the printing machine has been transported by the frame 10 serving as a housing, the conveyor-type substrate transport device 12 fixedly disposed on the base portion of the frame 10, and the substrate transport device 12. A substrate lifting device 14 that lifts and lowers the substrate at a set position, a screen frame 18 that is held on the frame 10 so that the position of the substrate can be adjusted, a squeegee device 22 having a pair of squeegees 20, and a squeegee device 20 The squeegee moving device 24 is configured to move the squeegee 20 along the screen 16 by moving the squeegee 20 to the position. The squeegee device 22 is attached to a movable beam 26 of the squeegee moving device 24. The squeegee moving device 24 moves the squeegee device 22 back and forth by moving the movable beam 26 back and forth. The squeegee device 22 includes a squeegee lifting device 28 that lifts and lowers each of the pair of squeegees 20 individually. Although not described in detail, the printing press also includes a cleaning device 30 that has a nonwoven fabric or the like and cleans the lower surface of the screen 16.

The printing work by this printing machine will be explained. First, the substrate is carried in by the substrate transport device 12 so as to pass through an opening (see FIG. 1) provided in the exterior panel, and is stopped at the set position. At this position, the substrate is raised by the substrate lifting device 14 and brought into close contact with the lower surface of the screen 16. In this state, one of the pair of squeegees 20 is lowered by the squeegee lifting device 28 until the tip is in contact with the upper surface of the screen 16, and then the squeegee 20 lowered by the squeegee moving device 22 is moved back and forth. Is moved in one direction. That is, a predetermined printing operation is performed. Specifically, when the squeegee being lowered 20 is the front side, the squeegee 20 is moved rearward. When the squeegee 20 is the rear side, the squeegee 20 is moved forward. The solder is supplied on the upper surface of the screen 16, and a plurality of openings are formed in the screen 16 in a pattern set according to the substrate. As the squeegee 20 moves forward or backward, the solder passes through the openings and is printed on the substrate. The board on which the solder is printed is lowered by the board lifting / lowering device 14 and carried out of the printing machine by the board conveying device 12.

Various controls related to the printing press including the above printing operation are performed by a control device 32 mainly composed of a computer. Further, as an input / output terminal related to the control, the printing press has an operation panel 34 having a display (see FIG. 1), and the operation panel 34 is connected to the control device 32. On the operation panel 34, various states of the printing press, instructions and warnings for the operator are displayed, and various commands issued by the operator to the printing press can be input. Further, the printing machine includes a barcode reader 36 as a device for inputting information related to solder described later, and the barcode reader 36 is also connected to the control device 32.

≪Solder amount detection≫
Since the printing operation by each of the pair of squeegees 20 is performed alternately, as shown in FIG. 3, the solder supplied on the screen 16 is in a roll shape between the pair of squeegees 20, that is, The solder roll 40 exists. Specifically, FIG. 3A shows a state in which the movement of the squeegee 20 is stopped in the printing operation, and FIG. 3B shows a state in which the squeegee 20 that has been performing the printing operation is raised. After the squeegee 20 is raised, the solder roll 40 has a shape shown in FIG. 3C, that is, a generally cylindrical shape.

The printing machine includes a solder sensor 50 disposed between a pair of squeegees 20 in order to measure the diameter of the solder roll 40, specifically, the diameter. The solder sensor 50 detects an optical characteristic (for example, a color) of an object existing directly below itself, and can identify whether the object is the screen 16 or solder. Has been. As shown in FIG. 3C, by moving the solder sensor 50 back and forth at a predetermined speed by the squeegee moving device 24, the solder sensor 50 scans the screen 16 and measures the diameter of the solder roll 40. To do. Since the diameter of the solder roll 40 (hereinafter may be referred to as “solder roll diameter”) depends on the amount of solder supplied on the screen 16 (hereinafter may be referred to as “solder amount”), Based on the solder roll diameter, it is possible to detect the amount of solder. This printing machine has a function of detecting the amount of solder based on the diameter of the solder roll, and the solder sensor 50 functions as a solder amount detector.

≪Additional solder supply work≫
In this printing press, the additional supply of solder is performed manually by the operator of the printing press. As shown in FIG. 1, the printing press includes a door 60 as a part of the housing, that is, a part of the exterior panel, and the additional supply of solder is performed with the door 60 opened. . More specifically, the additional supplied solder is taken out from the container in an appropriate amount and placed on the screen 16. When additional solder is supplied, predetermined kneading is performed. More specifically, the adjustment of the solder, that is, the preparation of the solder roll 40 is performed by repeatedly performing the same operation as the printing operation by the pair of squeegees 20.

The additional solder supply work should be performed when solder printing is not performed by the printer. Therefore, in this printing press, as shown in FIG. 1, a door sensor 62 for detecting whether the door 60 is in an open state or a closed state, and for preventing the door 60 from being opened. Each of the door lock mechanisms 64 is provided, and the additional solder supply operation is performed when printing is performed. In other words, the printing is performed when the door 60 is opened. Is prevented. The door can be locked manually by the door lock release switch 66 of the operation panel 34.

≪Two recognition processes related to additional supply of solder≫
The printing machine has a function of performing two recognition processes, that is, two confirmation processes (verify) in connection with the additional supply of solder. One of the two recognition processes is a process for recognizing whether or not additional solder is actually supplied, and the other is a process for recognizing whether or not the additionally supplied solder is appropriate. is there. These two recognition processes are performed by executing the additional solder supply management program shown in the flowchart of FIG. When the program is executed, the control device 32 is configured to have a functional unit as shown in FIG. That is, each functional unit shown in FIG. 5 is realized. Hereinafter, the two recognition processes will be described with reference to FIGS. 4 and 5 along the flowchart of the program.

In the processing in accordance with the additional solder supply management program, first, in step 1 (hereinafter abbreviated as “S1”, the same applies to other steps), whether there is an instruction to additionally supply solder, or a door It is determined whether or not 60 release operations have been performed. The control device 32 includes a work management unit 70 that manages printing work. This work management unit 70 manages the timing of additional supply of solder by grasping the number of printed boards. Yes. The instruction to additionally supply the solder is issued from the work management unit 70, and the instruction is displayed on the operation panel 34, so that the operator performs the additional supply work of the solder. On the other hand, the door 60 release operation is issued when the door lock release switch 66 of the operation panel 34 is operated. This operation is performed by the operator when additional solder is supplied regardless of the instruction from the work management unit 70. Incidentally, the above instruction and operation can be interpreted as a command indicating that the door 60 should be allowed to open in relation to the additional supply of solder.

The instruction that additional solder should be supplied or the fact that there has been a door lock release operation is input to the solder detection control unit 72 that controls the detection of the amount of solder. The solder detection control unit 72 considers that additional solder is supplied if there is such an instruction or operation, and in S2, prior to unlocking the door 60 by the door lock mechanism 64, at that time The solder sensor 50 is measured by the solder sensor 50 as the solder roll diameter (pre-addition solder roll diameter) φ _B before the solder is additionally supplied. That is, the amount of solder is detected by controlling the squeegee device 22 using the above-described command to allow the door 60 to be opened as a trigger. After measuring the solder roll diameter φ _B , the solder detection control unit 72 sends an instruction to the door lock control unit 74 in S3, and the door lock control unit 74 receiving the instruction sends the door lock mechanism 64 to the door lock mechanism 64. The release is executed.

In the case of additional supply of solder, the door 60 is opened by the operator, and after the additional supply operation is completed, the door 60 is closed again by the operator. The solder detection control unit 72 detects such an operation of the door 60 using the door sensor 62, and if it is determined in S4 that the door 60 has been changed from the open state to the closed state, Assuming that printing is resumed, an instruction to lock the door 60 is sent to the door lock control unit 74 in S5. Upon receiving this instruction, the door lock control unit 74 causes the door lock mechanism 64 to lock the door 60. Thereafter, the solder detection control unit 72, in S6, again, the roll diameter of the solder at the time, as the solder roll diameter (add after the solder roll diameter) phi _A after the solder is additionally supplied to the solder sensor 50 Let me measure.

As described above, the solder detection control unit 72 measures the diameter of the solder roll before and after the additional supply of solder in relation to the opening and closing of the door 60 that is inevitably performed when the additional supply of solder is performed. It is configured. That is, depending on whether the door 60 is opened or closed, the solder amount is detected twice before and after the additional supply of solder. With this configuration, in the present printing machine, it is possible to reliably grasp the amount of solder before and after the operation even though the additional supply of solder is performed manually by the operator.

The pre-addition solder roll diameter φ _B and the post-addition solder roll diameter φ _A measured by the solder sensor 50 are compared by the solder addition determination unit 76 in S7. In detail, the roll diameter difference [Delta] [phi minus roll diameter phi _B solder before adding the additional post solder roll diameter phi _A is, it is determined whether or not larger than the threshold value [Delta] [phi _TH is greater, and the solder is additionally supplied When it is determined that the solder is small, it is determined that no additional solder is supplied. By making this determination, the printing press has a function of recognizing whether or not additional solder is actually supplied. If additional solder is not supplied, a warning that additional solder has not been supplied is issued to the operator via the operation panel 34 in S8. On the other hand, if it is determined in S7 that the solder has actually been supplied, an instruction to read the added solder ID is issued to the operator via the operation panel 34 in S9.

As shown in FIG. 6, a bar code 92 is attached to the container 90 in which the solder is accommodated, and the ID of the additionally supplied solder is the bar attached to the container 90 in which the solder is accommodated. It is obtained by reading the code 92 with the barcode reader 36. That is, the barcode 92 is an identifier for the solder attached to the additionally supplied solder container 90, and the barcode reader 36 functions as an identifier reader for reading the identifier. The result read by the barcode reader 36 is sent to the actual supply solder recognition information acquisition unit 78. In S10, the actual supply solder recognition information acquisition unit 78 determines the actual supply solder recognition information acquisition unit 78. Information for recognizing actual supply solder, which is information for recognizing the type, is obtained.

On the other hand, appropriate solder information that is information on the solder that is appropriate for the current printing operation, that is, information on the type of solder to be supplied, is stored in the appropriate solder information storage unit 80. This information is stored by being input from the operation panel 34, or stored based on information existing in the print program for the print job.

After obtaining the actual supply solder recognition information, in S11, the information is compared with the appropriate solder information. This comparison is performed by the additional solder suitability certification unit 82. Specifically, the additional solder suitability determination unit 82 determines whether the solder type indicated by the actual supply solder recognition information matches the solder type indicated by the appropriate solder information, and is additionally supplied. Appropriateness of solder is certified. As a result of this certification, the printing press has a function of recognizing whether or not the additionally supplied solder is appropriate. If it is determined to be appropriate, the printing operation is allowed in S12. That is, the control device 32 accepts an operation performed on the operation panel 34 in order to resume printing.

On the other hand, if the additionally supplied solder is not appropriate in S11, that is, if it is recognized as inappropriate, the printing operation is prohibited in S13. That is, the control device 32 does not accept an operation performed on the operation panel 34 in order to resume printing. The prohibition of the printing operation is performed by the operation prohibiting unit 84. Further, in S14, following the work prohibition, the work prohibition unit 84 issues a warning to the operator via the operation panel 34 that the additionally supplied solder type does not match the appropriate solder type.

The function of recognizing whether or not the additional supplied solder is appropriate, and the function of performing the action when the additional supplied solder is found to be inappropriate, prevent the printing work with the inappropriate solder. Will be prevented. The additional solder supply management program is repeatedly executed every time printing is resumed.

≪Modification≫
Although the printing machine of the said Example is for printing cream solder on a board | substrate, this invention is not specifically limited, The printing machine which prints cream solder using a screen Widely applicable to. Further, in the printing press of the above embodiment, the solder amount is detected based on the solder roll diameter, but in the present invention, the specific method for detecting the solder amount is not particularly limited. The printing press of the present invention may be configured to detect the amount of solder by, for example, measuring the weight of solder supplied on the screen.

In the printing machine of the above embodiment, the actual supply solder recognition information is obtained by reading the barcode attached to the container. However, the identifier is not particularly limited. For example, the QR code (registration) Trademark) or the like. Further, the printing press of the present invention may be configured to obtain the actual supply solder recognition information based on information input by the operator to the operation panel or the like, instead of reading the identifier.

16: Screen 20: Squeegee 22: Squeegee device 32: Control device 34: Operation panel 36: Bar code reader (identifier reader) 40: Solder roll 50: Solder sensor (solder amount detector) 60: Door 64: Door lock mechanism 72: Solder detection control unit 76: Solder addition determination unit 78: Information acquisition unit for recognition of actual supply solder 80: Appropriate solder information storage unit 82: Additional solder suitability certification unit 84: Work prohibition unit 90: Container 92: Bar code (identifier) )

Claims

A solder printing machine that prints cream solder supplied on a screen onto a substrate using a squeegee,
Equipped with a solder amount detector to detect the amount of cream solder being supplied on the screen,
A control device that controls the solder printing machine
A solder information storage unit for storing appropriate solder information which is information about the type of cream solder to be supplied;
An actual supply solder recognition information obtaining unit for obtaining actual supply solder recognition information for recognizing the type of cream solder actually supplied;
Based on the detection result by the solder amount detector, a solder addition determining unit that determines whether or not cream solder is additionally supplied;
When it is determined by the additional solder determination unit that cream solder has been additionally supplied, additional solder propriety for certifying the appropriateness of the additionally supplied cream solder based on the appropriate solder information and the actual supply solder recognition information A solder printing machine characterized by having a certified part.
The solder printer includes a door that is provided as a part of the housing and opens and closes, and a door lock mechanism that locks the door so that the door is not opened. It is configured to be supplied additionally,
The control device is
Prior to unlocking the door by the door lock mechanism, the solder amount detector detects the amount of solder using a command to allow opening of the door as a trigger, and then the solder When the printing of the cream solder by the printing machine is resumed, it has a solder detection control unit that causes the solder amount detector to detect the solder amount,
The solder printer according to claim 1, wherein the solder addition determination unit is configured to determine whether or not additional cream solder is supplied based on the amount of solder detected by the two detections.
The solder printer comprises an identifier reader for reading an identifier for the cream solder affixed to the additionally supplied cream solder container;
The solder printing according to claim 1 or 2, wherein the actual supply solder recognition information acquisition unit is configured to acquire the actual supply solder recognition information based on a result of reading by the identifier reader. Machine.
In the solder printing machine, the cream solder supplied on the screen exists as a solder roll having a roll shape,
The solder printer according to any one of claims 1 to 3, wherein the solder amount detector is configured to measure a diameter of the solder roll.
The control device is
5. The apparatus according to claim 1, further comprising an operation prohibiting unit that prohibits a printing operation by the solder printer when the additionally supplied cream solder is recognized as inappropriate by the additional solder suitability determining unit. Solder printer as described in.