CN105328981B - Automatic tin feeding device and its control method, screen printer - Google Patents
Automatic tin feeding device and its control method, screen printer Download PDFInfo
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- CN105328981B CN105328981B CN201410385314.8A CN201410385314A CN105328981B CN 105328981 B CN105328981 B CN 105328981B CN 201410385314 A CN201410385314 A CN 201410385314A CN 105328981 B CN105328981 B CN 105328981B
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- tin cream
- tin
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Abstract
The invention discloses a kind of screen printers, automatic tin feeding device and its control method, the screen printer includes a fuselage, the workbench of the body upper is set, the steel mesh of installation on the working platform, scraper and automatic tin feeding device, the automatic tin feeding device includes tin cream cylinder, for controlling the solenoid valve of the tin cream cylinder movement, for detecting the height detection sensor of tin cream height on screen printer steel mesh, the counting device of the mobile number of scraper for counting screen printer and with the solenoid valve, the height detection sensor, the control cabinet that the counting device is electrical connected.Automatic tin feeding device of the invention can accurately control the amount of tin cream on steel mesh, and tin cream is avoided to waste.The screen printer realizes the function of automatic tin adding, has saved human cost because being equipped with above-mentioned automatic tin feeding device.The amount of tin cream on the control method energy accurate judgement steel mesh of the automatic tin feeding device saves production cost so as to avoid tin cream waste.
Description
Technical field
The present invention relates to electronics manufacture field more particularly to a kind of screen printers and its automatic tin adding for printed circuit board
Device, the control method of the automatic tin feeding device.
Background technique
With being showing improvement or progress day by day for science and technology, electronic product constantly develops to miniaturization, multifunction, and surface installation technique
A kind of (Surface Mount Technology abbreviation SMT) the electronic components technology of technology as Highgrade integration, pushes away
Extensive use of the SMT line in electronic product production, manufacture is moved.Generally, SMT production line mainly includes screen printer, patch
The equipment such as machine and Wave soldering furnace.Wherein, screen printer is a kind of equipment tin cream bitten by steel mesh on pcb board.
Currently, screen printer uses plus tin method is: silk-screen person places a certain amount of tin cream on silk screen in advance, with print
The progress of brush, tin cream amount are constantly reduced, and silk-screen person requires to inspect periodically remaining tin cream amount on steel mesh according to operation card operation
And constantly add tin cream.There are some problems for this method, e.g., need tin cream because that can not accurately control in manually addition tin cream
Amount, be likely to result in that the addition of tin cream amount is excessive, and tin cream can overflow scraper region, and waste tin cream simultaneously influences printing quality, and adds
Add and very few also will affect printing quality；On the other hand, because needing the artificial moment to monitor the amount of tin cream, cause human cost excessively high.
Summary of the invention
It is an object of the invention to solve screen printer in the prior art by the tin cream amount on artificial judgment steel mesh and by people
Work adds tin cream and can not accurately control the amount of tin cream and cause tin cream waste and the excessively high technical problem of cost of labor, and provides
A kind of automatic tin feeding device can be realized screen printer automatic tin adding.
It is another object of the present invention to provide a kind of screen printers with automatic tin feeding device of the present invention.
Yet another object of the invention is that providing a kind of control method of automatic tin feeding device of the present invention.
The present invention proposes a kind of automatic tin feeding device, is used for screen printer, including tin cream cylinder, dynamic for controlling the tin cream cylinder
The solenoid valve of work, for detecting the height detection sensor of tin cream height on screen printer steel mesh, the scraper for counting screen printer
It moves the counting device of number and is electrical connected with the solenoid valve, the height detection sensor, the counting device
Control cabinet.
The automatic tin feeding device, the tin cream cylinder are mounted on a tin cream cylinder fixed frame, the tin cream cylinder fixed frame
It is mounted on screen printer by a mounting and fixing support.
The automatic tin feeding device, the automatic tin feeding device further include for detecting tin cream amount in the tin cream cylinder
Proximity sensor, the proximity sensor are mounted on the tin cream cylinder fixed frame by a suspension arm with U-shaped hole.
The automatic tin feeding device, the automatic tin feeding device further include keypad, and the keypad is equipped with report
Alert indicator light and buzzer, when the proximity sensor detects that the tin cream in tin cream cylinder is less than setting value, the keypad
On buzzer issue sound alarm and alarm lamp etc. is bright.
The automatic tin feeding device, the automatic tin feeding device further include installing to be used to adjust above the tin cream cylinder
The cylinder current limiter of tin cream extruded velocity.
The automatic tin feeding device, the counting device include a mounting plate, the slot being mounted on the mounting plate
Type photoelectric sensor and an inductor baffle, when the inductor baffle passes through from the slot of the groove profile photoelectric sensor,
Light in slot is blocked, and the groove profile photoelectric sensor exports a switch control signal, and the counting device completes primary meter
Number.
The present invention separately provides a kind of screen printer comprising a fuselage, the workbench of the setting body upper and installation
Steel mesh and scraper on the working platform are also equipped with above-mentioned automatic tin feeding device on the screen printer.
The present invention separately provides a kind of control method of automatic tin feeding device, is applied to screen printer comprising following steps:
Height detection sensor detects the height of tin cream on screen printer steel mesh；
When the height detection sensor detects the tin cream height on steel mesh lower than setting height, counting device starts
It counts, when count value is more than setting value, when the tin cream height measured is still below setting height, control cabinet control solenoid valve is led
It is logical, squeeze out the predetermined position on tin cream to steel mesh；
When the height detection sensor detects that the height of the tin cream on steel mesh reaches setting height, control cabinet control electricity
Magnet valve cutting stops squeezing out tin cream.
The control method of the automatic tin feeding device, the control method further include in proximity sensor detection tin cream cylinder
The step of contained tin cream amount.
The control method of the automatic tin feeding device, when the proximity sensor detects in continuous pre-determined number
When tin cream amount in tin cream cylinder is less than setting value, control cabinet issues alarm signal.
Compared with prior art, the invention has the following beneficial effects:
Automatic tin feeding device of the invention is detected on screen printer steel mesh by the way that height detection sensor is arranged on screen printer
The height of tin cream, so as to accurately control the amount of tin cream on steel mesh, avoids tin cream unrestrained to determine whether toward tin cream is added on steel mesh
Take, save production cost, improves production quality.
Screen printer of the invention realizes the function of automatic tin adding, saves because being equipped with automatic tin feeding device of the invention
Human cost.
The amount of tin cream on the control method energy accurate judgement steel mesh of automatic tin feeding device of the present invention, and certainly according to the amount of tin cream
It is dynamic to control whether to add tin, so as to avoid tin cream waste, save production cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the screen printer with automatic tin feeding device of the present invention.
Fig. 2 is the structural representation of the tin cream cylinder fixed frame and associated components mounted thereto of automatic tin feeding device of the present invention
Figure.
Fig. 3 is the structural schematic diagram of counting device of the present invention.
Fig. 4 is the schematic illustration of automatic tin feeding device of the present invention.
Fig. 5 is the control method flow chart of automatic tin feeding device of the present invention.
Specific embodiment
Principle and structure in order to further illustrate the present invention carry out the preferred embodiment of the present invention now in conjunction with attached drawing detailed
It describes in detail bright.
As depicted in figs. 1 and 2, Fig. 1 is the structural schematic diagram of the screen printer with automatic tin feeding device of the present invention, and Fig. 2 is
The tin cream cylinder fixed frame of automatic tin feeding device of the present invention and the structural schematic diagram of associated components mounted thereto.Screen printer 2 wraps
Include a fuselage 21 and the workbench of 21 top of fuselage be set, be equipped on the workbench steel mesh 22, scraper 23 and from
Dynamic tin feeding device.
Automatic tin feeding device of the invention includes tin cream cylinder 12, the solenoid valve for controlling the movement of tin cream cylinder 12, for examining
Survey the mobile number of the height detection sensor 13 of tin cream height on 2 steel mesh 22 of screen printer, the scraper 23 for counting screen printer 2
Counting device 14, the proximity sensor 15 for detecting tin cream amount in tin cream cylinder 12 and with solenoid valve, height detection sensor
13, the control cabinet 16 that counting device 14, proximity sensor 15 are electrical connected.
Tin cream cylinder 12 is mounted on tin cream cylinder fixed frame 11, and tin cream cylinder fixed frame 11 installs silk by mounting plate 111
In the rack 25 of print machine 2.Tin cream cylinder 12 includes cylinder 121 and the diversion pipe 122 being connected with cylinder 121, which opens
Mouth alignment steel mesh 22, so that tin cream to be extruded into the predetermined position of steel mesh 22.There is a piston, in the work of solenoid valve in tin cream cylinder 12
Under, tin cream cylinder 12 realizes the movement for squeezing out tin cream or stopping squeezing out tin cream.In addition, squeezing tin to preferably control tin cream cylinder 12
The speed of cream is also equipped with cylinder current limiter 18 in the top of the tin cream cylinder 12.
Proximity sensor 15 is mounted on tin cream cylinder fixed frame 11 by a suspension arm 151 with U-shaped hole.
Height detection sensor 13 is arranged close on the doctor blade holder of the screen printer 2 of 12 diversion pipe of tin cream cylinder, 122 position.
As shown in figure 3, Fig. 3 is the structural schematic diagram of counting device of the present invention.Counting device 14 include a mounting plate 143,
The groove profile photoelectric sensor 141 and an inductor baffle 142 being mounted on mounting plate 143.Mounting plate 143 is mounted on screen printer
The front end of 2 workbench, inductor baffle 142 are mounted on the top for groove profile photoelectric sensor 141, the inductor baffle 142
It is moved with the movement of scraper 23, the light when inductor baffle 142 passes through from the slot of groove profile photoelectric sensor 141, in slot
It is blocked, photoelectric sensor 141 exports a switch control signal, completes primary count.
The signal that height detection sensor 13, counting device 14 and proximity sensor 15 are generated is transferred to control cabinet
16, control cabinet 16 is according to the corresponding component actuation of those signal designations.Wherein, which can be PLC control cabinet.
In addition, the automatic tin feeding device is additionally provided with keypad 17, it is mounted on the shell of 2 fuselage 21 of screen printer.This is pressed
Keypad 17 is equipped with power switch button, work light, alarm lamp and the buzzer of control automatic tin feeding device work.
Illustrate the working principle of automatic tin feeding device of the present invention below in conjunction with Fig. 1 and Fig. 4.
Tin cream 3 height of the detection of height detection sensor 13 between scraper 23 and steel mesh 22, height H is that setting is high
Degree.When height detection sensor 13 measures the height of tin cream 3 lower than setting height H, counting device 14 is started counting, and works as counting
When value is more than setting value (for example, setting value is 5), when measuring H when tin cream height is still below setting height, control cabinet 16 indicates electricity
Gas circuit is connected in magnet valve, pushes the piston of tin cream cylinder 12 that tin cream is expressed into the predetermined position of steel mesh 22, height detection sensor 13
When detecting that the tin cream height on steel mesh 22 reaches setting value H, control cabinet 16 indicates that solenoid valve cuts off gas circuit, stops squeezing out
Tin cream.When detecting that the inner tin cream of tin cream cylinder 12 has been used up close to inductor 15, the buzzer on keypad 17 will call the police prompt
Employee replaces tin cream in time, meanwhile, it is set when 17 continuous ten cycle detections of proximity sensor to the tin cream in tin cream cylinder 12 are less than
When definite value, the buzzer on keypad 17 can also issue sound alarm, while alarm lamp etc. is bright, to prompt employee to confirm tin
Whether the tin cream in cream cylinder 12 is finished.
In order to save energy consumption, the time that above-mentioned height detection sensor 13 is started to work may be set to scraper 23 and work one section
After time (time parameter can control case 16 to set), and the time of scraper work can be examined by doctor position sensor 24
It surveys.
Illustrate the control method of automatic tin feeding device of the present invention now in conjunction with Fig. 1 and Fig. 5, comprising the following steps:
Height detection sensor 13 detects the height of tin cream on 2 steel mesh 22 of screen printer, wherein when doctor position sensor 24
After detecting that scraper 23 has started a period of time, height detection sensor 13 is started to work.
When height detection sensor 13 detects the tin cream height on steel mesh 22 lower than setting height, counting device 14 is opened
Begin to count, when count value is more than setting value (for example, setting value be 5), when measuring tin cream height and being still below setting height, control
Case 16 indicates that solenoid valve conduction, tin cream cylinder 12 squeeze out the predetermined position on tin cream to steel mesh 22.
When height detection sensor 13 detects that the height of the tin cream on steel mesh 22 reaches setting height, control cabinet 16 is controlled
Solenoid valve cutting, tin cream cylinder 12 stop squeezing out tin cream.
Proximity sensor 15 detects the tin cream amount in tin cream cylinder 12, when detecting the inner tin cream of tin cream cylinder 12 close to inductor 15
When having been used up, the buzzer on keypad 17 will call the police prompt employee and replace tin cream in time；When proximity sensor 17 continuous ten
When cycle detection is less than setting value to the tin cream in tin cream cylinder 12, the buzzer on keypad 17 can also issue sound alarm, together
Alarm indicator light etc. is bright, and employee confirms whether tin cream is finished in tin cream cylinder 12, if being finished, carries out adding tin to tin cream cylinder.
From the foregoing, it will be observed that automatic tin feeding device of the invention detects silk-screen by the way that height detection sensor is arranged on screen printer
The height of tin cream, so as to accurately control the amount of tin cream on steel mesh, is kept away to determine whether toward tin cream is added on steel mesh on machine steel mesh
Exempt from tin cream waste, save production cost, improves production quality.
Automatic tin feeding device of the invention is also by being positioned proximate to sensor, to monitor the amount of tin cream in tin cream cylinder automatically,
Without the amount in manual periodic inspection tin cream cylinder, to achieve the purpose that reduce cost of labor.
The above is only preferable possible embodiments of the invention, not limit the scope of the invention, all with the present invention
The variation of equivalent structure made by specification and accompanying drawing content, is included within the scope of protection of the present invention.
Claims (9)
1. a kind of automatic tin feeding device is used for screen printer, which is characterized in that moved including tin cream cylinder, for controlling the tin cream cylinder
The solenoid valve of work, for detecting the height detection sensor of tin cream height on screen printer steel mesh, the scraper for counting screen printer
It moves the counting device of number and is electrical connected with the solenoid valve, the height detection sensor, the counting device
Control cabinet, the tin cream cylinder is interior to have a piston, high lower than setting in the tin cream height that the height detection sensor detects
When spending, the movement of the solenoid valve pushes the piston motion of the tin cream cylinder to squeeze out tin cream, and the counting device includes an installation
Plate, the groove profile photoelectric sensor being mounted on the mounting plate and an inductor baffle, when the inductor baffle is from described
When passing through in the slot of groove profile photoelectric sensor, the light in slot is blocked, and the groove profile photoelectric sensor exports a switch control
Signal, the counting device complete primary count.
2. automatic tin feeding device according to claim 1, which is characterized in that the tin cream cylinder is mounted on a tin cream cylinder and fixes
On frame, the tin cream cylinder fixed frame is mounted on screen printer by a mounting and fixing support.
3. automatic tin feeding device according to claim 2, which is characterized in that the automatic tin feeding device further includes for examining
The proximity sensor of tin cream amount in the tin cream cylinder is surveyed, the proximity sensor is mounted on institute by a suspension arm with U-shaped hole
It states on tin cream cylinder fixed frame.
4. automatic tin feeding device according to claim 3, which is characterized in that the automatic tin feeding device further includes key
Plate, the keypad is equipped with alarm lamp and buzzer, when the proximity sensor detects that the tin cream in tin cream cylinder is small
When setting value, the buzzer on the keypad issues sound alarm and alarm lamp is bright.
5. automatic tin feeding device according to claim 1, which is characterized in that the automatic tin feeding device further includes installation institute
State the cylinder current limiter for being used to adjust tin cream extruded velocity above tin cream cylinder.
6. a kind of screen printer, which is characterized in that including a fuselage, the workbench of the body upper is arranged and is mounted on described
Steel mesh and scraper on workbench, be also equipped on the screen printer as described in any one of claim 1 to 5 automatic plus
Tin device.
7. a kind of control method of automatic tin feeding device is applied to screen printer, which comprises the following steps:
Height detection sensor detects the height of tin cream on screen printer steel mesh；
When the height detection sensor detects the tin cream height on steel mesh lower than setting height, counting device starts to silk
The mobile number of the scraper of print machine is counted, and when count value is more than setting value, the tin cream height measured is still below setting height
When, control cabinet controls solenoid valve conduction, squeezes out the predetermined position on tin cream to steel mesh；
When the height detection sensor detects that the height of the tin cream on steel mesh reaches setting height, control cabinet controls solenoid valve
Cutting stops squeezing out tin cream.
8. the control method of automatic tin feeding device according to claim 7, which is characterized in that the control method further includes
Proximity sensor detects the step of contained tin cream amount in tin cream cylinder.
9. the control method of automatic tin feeding device according to claim 8, which is characterized in that when the proximity sensor exists
When detecting that the tin cream amount in tin cream cylinder is less than setting value in continuous pre-determined number, control cabinet issues alarm signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410385314.8A CN105328981B (en) | 2014-08-06 | 2014-08-06 | Automatic tin feeding device and its control method, screen printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410385314.8A CN105328981B (en) | 2014-08-06 | 2014-08-06 | Automatic tin feeding device and its control method, screen printer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105328981A CN105328981A (en) | 2016-02-17 |
| CN105328981B true CN105328981B (en) | 2019-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410385314.8A Active CN105328981B (en) | 2014-08-06 | 2014-08-06 | Automatic tin feeding device and its control method, screen printer |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106341959B (en) * | 2016-10-21 | 2018-10-19 | 珠海格力电器股份有限公司 | Paste coating device for printed circuit board |
| CN107124836A (en) * | 2017-07-04 | 2017-09-01 | 东莞市凯格精密机械有限公司 | A kind of automatic tin feeding device and printed circuit board production line |
| CN108177436A (en) * | 2017-12-28 | 2018-06-19 | 通富微电子股份有限公司 | A kind of detection device and detection method of tin cream dosage |
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| JPH05261892A (en) * | 1992-03-18 | 1993-10-12 | Sharp Corp | Creamy solder screen printing machine |
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| CN2586191Y (en) * | 2002-12-11 | 2003-11-12 | 技嘉科技股份有限公司 | Automatic tin feeder |
| CN102378687A (en) * | 2010-01-08 | 2012-03-14 | 松下电器产业株式会社 | Screen printing machine |
| CN201674927U (en) * | 2010-02-24 | 2010-12-22 | 章丘市炊具机械总厂 | Automatic counting mechanism of press flour machine |
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| CN105328981A (en) | 2016-02-17 |
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