CN115923333A - Printed circuit board silk screen printing drying device - Google Patents
Printed circuit board silk screen printing drying device Download PDFInfo
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- CN115923333A CN115923333A CN202310137146.XA CN202310137146A CN115923333A CN 115923333 A CN115923333 A CN 115923333A CN 202310137146 A CN202310137146 A CN 202310137146A CN 115923333 A CN115923333 A CN 115923333A
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Abstract
The invention provides a printed circuit board silk-screen drying device, which belongs to the field of printed circuit board production equipment and comprises: the device comprises a drying box, wherein a feeding rail, a middle rail and a discharging rail which are all in a horizontal state are sequentially arranged on the same side of the drying box from top to bottom at intervals, pushing devices are arranged on the other opposite side of the drying box corresponding to the middle rail and the discharging rail, and a lifting mechanism is arranged in the drying box and used for bearing a circuit board and transferring the circuit board from top to bottom; the silk screen printing frame, including the last silk screen printing board that is located the feeding track top and the lower silk screen printing board that is located middle track top, the top surface of going up silk screen printing board and silk screen printing board down all is equipped with the scraper blade subassembly, goes up the silk screen printing board and is used for the circuit board silk screen printing carbon oil to the feeding track, and silk screen printing protection glue is glued on the carbon oil layer that the silk screen printing board is used for the circuit board surface to the middle track down, and the silk screen printing frame moves the setting along vertical direction. The device has compact structure, convenient arrangement and effectively reduced investment cost of equipment.
Description
Technical Field
The invention belongs to the technical field of printed circuit board production equipment, and particularly relates to a printed circuit board silk-screen drying device.
Background
Printed Circuit Boards (PCBs) are important electronic components, which are used as support bodies and carriers for electrical connection of electronic components. In the manufacture of printed circuit boards, carbon oil is often used for processing, wherein the carbon oil is ink composed of conductive carbon powder and resin, and the ink can play a role in conducting and adjusting resistance. The carbon oil is generally used for designing keys or manufacturing surface resistance, and the carbon oil is processed by screen printing and then drying the carbon oil, so that a carbon oil layer is formed. The carbon oil layer has conductivity, so after the carbon oil is processed, surface treatment is performed, such as electroless nickel-gold plating, electroless silver plating, electroless tin plating and the like, but all of the above surface treatment deposits metal on the surface of the carbon oil layer, which causes resistance change of the carbon oil layer and influences use. If the surface treatment is carried out before the carbon oil layer is manufactured, the treated surface, especially chemical silver plating and chemical tin plating, is easy to scratch in the process of silk-screen printing of the carbon oil.
In the existing method, a layer of protective glue is usually printed on the surface of a carbon oil layer in a silk-screen manner, the protective glue is dried and cured, then surface treatment is carried out, and finally the protective glue is removed, so that a complete carbon oil layer can be obtained, and the surface quality of a circuit board is ensured. However, the process needs two screen printing and two drying processes, and the existing equipment is generally provided with independent screen printing and drying equipment in order to realize continuous production, so that the input cost of the equipment is increased, a large indoor space is occupied, and the equipment is inconvenient to arrange.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides the printed circuit board silk-screen drying device which is compact in structure, convenient to arrange and capable of effectively reducing the input cost of equipment.
In order to realize the purpose of the invention, the following scheme is adopted:
the utility model provides a printed circuit board silk screen printing drying device, includes: the drying box is used for drying the circuit board, a feeding rail, a middle rail and a discharging rail which are all in a horizontal state are sequentially arranged on the same side of the drying box at intervals from top to bottom, a material pushing device is arranged on the other opposite side of the drying box corresponding to the middle rail and the discharging rail and used for pushing the circuit board in the drying box to the middle rail and the discharging rail respectively, and a lifting mechanism is arranged inside the drying box and used for receiving the circuit board and transferring the circuit board from top to bottom;
the silk screen printing frame is including the last silk screen printing board that is located the feeding track top and the lower silk screen printing board that is located the middle track top, and the top surface of going up silk screen printing board and silk screen printing board down all is equipped with the scraper blade subassembly, goes up the silk screen printing board and is used for the circuit board silk screen printing carbon oil on to the feeding track, and lower silk screen printing board is used for silk screen printing protective paste on the carbon oil layer on the circuit board surface on the middle track, and feeding track and middle track all can be sent into the stoving case with the circuit board, and the silk screen printing frame moves the setting along vertical direction.
Further, the top surfaces of the feeding track and the middle track are respectively provided with a plurality of rows of first air holes in a rectangular array, the first air holes incline towards the drying box, and the first air holes are communicated with the air pump and are respectively used for blowing air to the top surfaces of the feeding track and the middle track.
Further, orbital top surface all is the rectangular array in middle and is equipped with multiseriate second gas pocket, and the equal slope orientation of second gas pocket deviates from the party of stoving case, and the second gas pocket all communicates with the air pump for blow to orbital top surface in middle.
Furthermore, the two sides of the top surfaces of the feeding rail and the middle rail are respectively provided with a barrier strip, the barrier strips are arranged in a moving mode along the direction perpendicular to the top surfaces of the feeding rail and the middle rail, and under the pressing action of the upper screen printing plate and the lower screen printing plate, the barrier strips can be hidden into the corresponding feeding rail and the middle rail.
Further, the top surface of the middle rail far away from one end of the drying box is provided with an upper baffle plate, the upper baffle plate is movably arranged along the direction perpendicular to the top surface of the middle rail, and the upper baffle plate can be hidden into the middle rail under the downward pressing effect of the lower silk screen plate.
Further, the bottom surface that goes up the silk screen board and be close to stoving case one end is equipped with vertical decurrent lower baffle for inject the position of sending into the circuit board on the feeding track, the baffle has seted up and has dodged the groove under the orbital top surface of feeding corresponds, is used for holding lower baffle.
Further, two sets of scraper blade subassemblies are parallel to each other, the both ends that the silk screen printing frame corresponds the scraper blade subassembly all are equipped with the slide bar, the both ends sliding connection in the slide bar of scraper blade subassembly, the both sides of silk screen printing frame all are equipped with the swinging arms, the middle part of swinging arms is rotated and is connected in the silk screen printing frame, two swinging arms pivoted axis are coaxial and be on a parallel with the scraper blade subassembly, the bar hole has all been seted up along length direction at the both ends of swinging arms, the tip of scraper blade subassembly slides and locates in the bar hole, the silk screen printing frame is equipped with a telescoping device, telescoping device's telescopic link tip links to each other with one of them set of scraper blade subassembly, the telescopic link is on a parallel with the slide bar.
Further, the scraper blade subassembly includes the intermediate lever and installs the scraper blade in the intermediate lever both sides, and the space between the scraper blade is used for holding carbon oil or protection and glues, and the through hole has been seted up at the middle part of intermediate lever for add carbon oil or protection and glue.
Further, elevating system in the stoving case includes two conveyer belts of vertical setting, and the direction of rotation that two were listed as the conveyer belt is opposite, and the outer wall array of conveyer belt is equipped with the gyro wheel track, and the gyro wheel track all is the level setting, and two gyro wheel tracks on the conveyer belt are used for supporting circuit board in pairs, thereby the rotation through the conveyer belt drives circuit board from the top down and removes.
Furthermore, the outer wall of the drying box is provided with a driving motor, a main shaft of the driving motor is provided with a driving gear, two rows of conveying belts are provided with driven gears at the same end of the rotating end, the driving gear is directly meshed with one of the driven gears, and the driving gear is connected with the other driven gear through an idler wheel.
The invention has the beneficial effects that: according to the scheme, the circuit board can be dried twice by using one drying box, the investment of equipment is reduced, the arrangement and installation of the device are more convenient, and the device can finish the screen printing work of carbon oil and protective adhesive in sequence, so that the circuit board can realize continuous screen printing and drying, and the production efficiency is effectively ensured; go up silk screen printing board, feeding track, middle track and ejection of compact track and be vertical arranging, very big reduction is to the occupation on ground, conveniently arranges the installation.
Drawings
The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.
Fig. 1 shows a schematic side view of the overall structure of the present application.
Fig. 2 shows a partial enlarged view at a in fig. 1.
Fig. 3 shows a partial enlarged view at B in fig. 1.
Fig. 4 shows a partial enlarged view at C in fig. 1.
Fig. 5 shows a schematic structural diagram of a screen printing frame.
Fig. 6 shows another schematic view of the overall structure of the present application.
Fig. 7 shows a schematic structural diagram of a lifting mechanism in the drying box.
The labels in the figure are: the automatic screen printing device comprises a drying box-1, a material pushing device-11, an in-place sensor-12, a conveyor belt-13, a roller track-14, a driving motor-15, a driving gear-16, a driven gear-17, an idler gear-18, a feeding track-2, a barrier strip-21, an avoidance groove-22, a middle track-3, a first air hole-31, a second air hole-32, an upper barrier plate-33, a discharging track-4, a lifting device-41, a vertical rod-42, a screen printing frame-5, an upper screen printing plate-51, a lower screen printing plate-52, a scraper component-53, a middle rod-531, a through hole-5311, a scraper-532, a lower barrier plate-54, a sliding rod-55, a swinging rod-56, a strip-shaped hole-561 and a telescopic device-57.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings, but the described embodiments of the present invention are a part of the embodiments of the present invention, not all of the embodiments of the present invention.
As shown in fig. 1, 5 and 6, a printed circuit board screen printing drying device includes a drying box 1, a screen printing frame 5 and the like.
The silk screen frame 5 is including the last silk screen printing board 51 that is located feeding track 2 top and the lower silk screen printing board 52 that is located middle track 3 top, the top surface of going up silk screen printing board 51 and lower silk screen printing board 52 all is equipped with scraper blade subassembly 53, it is used for to the circuit board silk screen printing carbon oil on feeding track 2 to go up silk screen printing board 51, lower silk screen printing board 52 is used for silk screen printing protective paste on the carbon oil layer to the circuit board surface on middle track 3, feeding track 2 and middle track 3 all can send the circuit board into stoving case 1, the silk screen printing position that feeding track 2 and middle track 3 correspond the circuit board all is equipped with position detection sensor, an adaptation position for confirming the circuit board, position detection sensor is proximity switch, silk screen frame 5 moves the setting along vertical direction, with adjust the interval between last silk screen printing board 51 and the feeding track 2 and between lower silk screen printing board 52 and the middle track 3, thereby conveniently carry out the silk screen printing processing to the circuit board on feeding track 2 and middle track 3.
More specifically, as shown in fig. 1, the screen printing frame 5 is supported on the discharging track 4 through the lifting device 41, the lifting device 41 is used for controlling the lifting of the screen printing frame 5, the lifting device 41 is a hydraulic cylinder or an air cylinder, and is at least provided with a pair of vertical rods 42, two sides of the discharging track 4 are respectively provided with a pair of vertical rods 42 for supporting the feeding track 2 and the middle track 3, and the screen printing frame 5 is slidably arranged between the vertical rods 42 to keep a vertically moving track, so as to ensure the installation stability of the screen printing frame 5.
When the drying oven works, a circuit board with carbon oil silked on the feeding rail 2 enters the drying oven 1 to be dried, the lifting mechanism drives the circuit board to move downwards to the height same as that of the middle rail 3, the circuit board is pushed to the middle rail 3 under the action of the corresponding material pushing device 11, the circuit board enters the drying oven 1 again under the action of the middle rail 3 after silked protection glue is applied to the middle rail 3 to be dried again, then the circuit board continues to move downwards while being dried under the driving of the lifting mechanism until the circuit board moves to be parallel to the discharging rail 4, and then the circuit board is pushed to the discharging rail 4 under the action of the corresponding material pushing device 11. According to the scheme, the circuit board can be dried twice by using one drying box 1, so that the investment of equipment is reduced, and the screen printing work of carbon oil and protective adhesive can be completed in sequence, so that the circuit board can be continuously screen printed and dried, and the production efficiency is effectively ensured; go up silk screen printing board 51 and silk screen printing board 52 down and feeding track 2, middle track 3, ejection of compact track 4 all are vertical arranging, and very big reduction is to the occupation on ground, conveniently arranges the installation.
Preferably, as shown in fig. 3 and 4, the top surfaces of the feeding track 2 and the middle track 3 are rectangular arrays and are provided with a plurality of rows of first air holes 31, the first air holes 31 are inclined towards the drying box 1, the first air holes 31 are communicated with an air pump and are respectively used for blowing air to the top surfaces of the feeding track 2 and the middle track 3, so as to drive the circuit board to move towards the drying box 1, in order to determine whether the circuit board moves in place, the height positions of the side wall of the drying box 1 corresponding to the feeding track 2 and the middle track 3 are respectively provided with an in-place sensor 12 for detecting in-place signals of the circuit board, and the in-place sensor 12 is a proximity switch or a photoelectric switch.
Further preferably, as shown in fig. 3, the top surface of the middle rail 3 is provided with a plurality of rows of second air holes 32 in a rectangular array, the second air holes 32 incline towards the side deviating from the drying box 1, the second air holes 32 are communicated with the air pump, and the air pump is used for blowing air to the top surface of the middle rail 3 to drive the circuit board output by the drying box 1 to move on the middle rail 3, and simultaneously, the circuit board after being dried for one time is rapidly cooled, so that the viscosity of the protective adhesive is prevented from being reduced after encountering the high-temperature circuit board.
Further preferably, as shown in fig. 1 and 3, two sides of the top surfaces of the feeding track 2 and the middle track 3 are respectively provided with a barrier strip 21 for limiting the position of the circuit board in the width direction of the feeding track 2 and the middle track 3, the barrier strips 21 are movably arranged in the direction perpendicular to the top surfaces of the feeding track 2 and the middle track 3, and under the pressing action of the upper screen printing plate 51 and the lower screen printing plate 52, the barrier strips 21 can be hidden in the corresponding feeding track 2 and the middle track 3, so as to avoid affecting the attaching effect between the upper screen printing plate 51 and the circuit board and between the lower screen printing plate 52 and the circuit board.
Further preferably, as shown in fig. 3, an upper baffle 33 is disposed on a top surface of the middle rail 3, which is away from one end of the drying box 1, and is used for limiting a position of the drying box 1 from entering the circuit board on the middle rail 3, so as to further ensure a position of the circuit board when the circuit board is subjected to silk-screen printing protection glue, the upper baffle 33 is movably disposed in a direction perpendicular to the top surface of the middle rail 3, and under a downward pressing effect of the lower silk-screen printing plate 52, the upper baffle 33 can be hidden in the middle rail 3, so as to avoid influencing an attaching effect between the lower silk-screen printing plate 52 and the circuit board.
Further preferably, as shown in fig. 4 and 5, a vertically downward lower baffle 54 is disposed on a bottom surface of the upper screen printing plate 51 near one end of the drying box 1, and is used for limiting a position of the circuit board fed onto the feeding rail 2, thereby further determining a position of the circuit board during the screen printing of the carbon oil, an avoiding groove 22 is disposed on a top surface of the feeding rail 2 corresponding to the lower baffle 54 and is used for accommodating the lower baffle 54, when the upper screen printing plate 51 is pressed against the circuit board, the lower baffle 54 is trapped in the avoiding groove 22, so as to prevent an influence on a bonding effect between the upper screen printing plate 51 and the circuit board, the screen printing frame 5 moves upward to drive the lower baffle 54 to move upward together, and the lower baffle 54 is higher than the top surface of the feeding rail 2, so that the circuit board can enter the drying box 1 conveniently.
Preferably, as shown in fig. 1, 5 and 6, two sets of scraper assemblies 53 are parallel to each other, two ends of the screen printing frame 5 corresponding to the scraper assemblies 53 are both provided with a sliding rod 55, two ends of the scraper assemblies 53 are slidably connected to the sliding rod 55, two sides of the screen printing frame 5 are both provided with a swinging rod 56, a middle portion of the swinging rod 56 is rotatably connected to the screen printing frame 5, axes of rotation of the two swinging rods 56 are coaxial and parallel to the scraper assemblies 53, two ends of the swinging rod 56 are both provided with a strip-shaped hole 561 along a length direction, an end portion of the scraper assembly 53 is slidably arranged in the strip-shaped hole 561, the screen printing frame 5 is provided with a telescopic device 57, an end portion of a telescopic rod of the telescopic device 57 is connected to one of the scraper assemblies 53, the telescopic rod is parallel to the sliding rod 55, when the telescopic device 57 drives the scraper assembly 53 connected thereto to reciprocate along the sliding rod 55 through the telescopic rod, the swinging rod 56 simultaneously swings around the axis of the middle portion, thereby driving the other set of scraper assemblies 53 to reciprocate along the sliding rod 55, the two sets of scraper assemblies 53 move simultaneously, thereby enabling two sets of scraper assemblies 51 and 52 to simultaneously carry out carbon oil and protection on two circuit boards simultaneously, and facilitating the screen printing frame, and ensuring the efficiency of the screen printing frame 5 to be more compact. In this example, the telescoping device 57 may be a pneumatic cylinder.
Further preferably, as shown in fig. 2, the scraper component 53 includes a middle rod 531 and scrapers 532 installed on two sides of the middle rod 531, the scraper component 53 is connected with the strip-shaped holes 561 through two ends of the middle rod 531, and both ends of the middle rod 531 are provided with rollers or bearings, so as to be connected in the strip-shaped holes 561 in a rolling manner, so as to reduce friction, a space between the scrapers 532 is used for containing carbon oil or protective glue, so that the scraper component 53 can perform screen printing during reciprocating motion, and a through hole 5311 is formed in the middle of the middle rod 531 and used for adding the carbon oil or the protective glue.
Preferably, as shown in fig. 7, the lifting mechanism in the drying box 1 comprises two rows of vertically arranged conveyor belts 13, the two rows of conveyor belts 13 have opposite rotation directions, the outer wall array of the conveyor belts 13 is provided with roller tracks 14, more specifically, the roller tracks 14 comprise groove-shaped rod pieces with cross sections in a U-shaped structure, a plurality of rollers are arranged in the U-shaped grooves of the groove-shaped rod pieces along the length direction array, the circuit board can move more smoothly by the aid of the rollers, the roller tracks 14 are all horizontally arranged, the roller tracks 14 on the two rows of conveyor belts 13 are arranged in pairs for supporting the circuit board, and the circuit board is driven to move from top to bottom by the rotation of the conveyor belts 13.
Further preferably, as shown in fig. 7, the outer wall of the drying box 1 is provided with a driving motor 15, the main shaft of the driving motor 15 is provided with a driving gear 16, the rotating end portions of the same ends of the two rows of the conveyor belts 13 are provided with driven gears 17, the driving gear 16 is directly engaged with one driven gear 17, and the driving gear 16 is connected with the other driven gear 17 through an idler gear 18, and this structure can simultaneously drive the two rows of the conveyor belts 13 by using the same driving motor 15, and the rotating directions of the two rows of the conveyor belts 13 are opposite.
The foregoing is only a preferred embodiment of the present invention and is not intended to be exhaustive or to limit the invention. It will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention.
Claims (10)
1. The utility model provides a printed circuit board silk screen printing drying device which characterized in that includes:
the drying box (1) is used for drying the circuit board, a feeding track (2), a middle track (3) and a discharging track (4) which are all in a horizontal state are sequentially arranged on the same side of the drying box (1) from top to bottom at intervals, a material pushing device (11) is arranged on the other opposite side of the drying box (1) corresponding to the middle track (3) and the discharging track (4) and used for pushing the circuit board in the drying box (1) to the middle track (3) and the discharging track (4) respectively, and a lifting mechanism is arranged inside the drying box (1) and used for receiving the circuit board and transferring the circuit board from top to bottom;
silk screen printing frame (5), including last silk screen printing board (51) that is located feeding track (2) top and lower silk screen printing board (52) that is located middle track (3) top, the top surface of going up silk screen printing board (51) and silk screen printing board (52) down all is equipped with scraper blade subassembly (53), it is used for circuit board silk screen printing carbon oil on to feeding track (2) to go up silk screen printing board (51), silk screen printing board (52) are used for silk screen printing protective paste on the carbon oil layer to the circuit board surface on middle track (3) down, feeding track (2) and middle track (3) all can send into stoving case (1) with the circuit board, silk screen printing frame (5) are followed vertical direction and are removed the setting.
2. The printed circuit board silk-screen drying device of claim 1, wherein the top surfaces of the feeding rail (2) and the middle rail (3) are respectively provided with a plurality of rows of first air holes (31) in a rectangular array, the first air holes (31) are inclined towards the drying box (1), and the first air holes (31) are respectively communicated with an air pump and are respectively used for blowing air to the top surfaces of the feeding rail (2) and the middle rail (3).
3. The printed circuit board screen printing drying device according to claim 2, wherein the top surface of the middle rail (3) is provided with a plurality of rows of second air holes (32) in a rectangular array, the second air holes (32) are inclined towards the side away from the drying box (1), and the second air holes (32) are communicated with an air pump for blowing air to the top surface of the middle rail (3).
4. The printed circuit board silk-screen drying device of claim 1 or 2, wherein the two sides of the top surfaces of the feeding rail (2) and the middle rail (3) are respectively provided with a barrier strip (21), the barrier strips (21) are movably arranged along a direction perpendicular to the top surfaces of the feeding rail (2) and the middle rail (3), and under the pressing action of the upper silk-screen plate (51) and the lower silk-screen plate (52), the barrier strips (21) can be hidden into the corresponding feeding rail (2) and the middle rail (3).
5. The screen printing and drying device for the printed circuit boards as claimed in claim 4, wherein the top surface of the end of the middle rail (3) far away from the drying box (1) is provided with an upper baffle (33), the upper baffle (33) is movably arranged along a direction perpendicular to the top surface of the middle rail (3), and the upper baffle (33) can be hidden in the middle rail (3) under the pressing action of the lower screen printing plate (52).
6. The screen printing and drying device for the printed circuit boards as claimed in claim 4, wherein a lower baffle (54) which is vertically downward is arranged on the bottom surface of the upper screen printing plate (51) close to one end of the drying box (1) and used for limiting the position of the circuit board fed onto the feeding track (2), and a avoiding groove (22) corresponding to the lower baffle (54) is formed on the top surface of the feeding track (2) and used for accommodating the lower baffle (54).
7. The printed circuit board silk-screen drying device of claim 1, wherein the two groups of scraper assemblies (53) are parallel to each other, two ends of the silk-screen frame (5) corresponding to the scraper assemblies (53) are provided with slide rods (55), two ends of the scraper assemblies (53) are slidably connected to the slide rods (55), two sides of the silk-screen frame (5) are provided with swing rods (56), the middle parts of the swing rods (56) are rotatably connected to the silk-screen frame (5), the rotating axes of the two swing rods (56) are coaxial and parallel to the scraper assemblies (53), two ends of the swing rods (56) are provided with strip-shaped holes (561) along the length direction, the end parts of the scraper assemblies (53) are slidably arranged in the strip-shaped holes (561), the silk-screen frame (5) is provided with a telescopic device (57), the end parts of telescopic rods of the telescopic device (57) are connected with one group of the scraper assemblies (53), and the telescopic rods are parallel to the slide rods (55).
8. The printed circuit board silk-screen drying device of claim 1 or 7, wherein the scraper component (53) comprises a middle rod (531) and scrapers (532) arranged at two sides of the middle rod (531), a space between the scrapers (532) is used for containing carbon oil or protective glue, and a through hole (5311) is formed in the middle of the middle rod (531) and used for adding the carbon oil or the protective glue.
9. The screen printing and drying device for the printed circuit boards as claimed in claim 1, wherein the lifting mechanism in the drying box (1) comprises two rows of vertically arranged conveyor belts (13), the two rows of conveyor belts (13) rotate in opposite directions, the outer wall array of the conveyor belts (13) is provided with roller rails (14), the roller rails (14) are horizontally arranged, and the roller rails (14) on the two rows of conveyor belts (13) are arranged in pairs for supporting the circuit boards and driving the circuit boards to move from top to bottom under the rotation of the conveyor belts (13).
10. The screen printing and drying device for the printed circuit boards as claimed in claim 1, wherein the outer wall of the drying box (1) is provided with a driving motor (15), a driving gear (16) is arranged on a main shaft of the driving motor (15), driven gears (17) are arranged at rotating ends of the same end of the two rows of conveyor belts (13), the driving gear (16) is directly meshed with one driven gear (17), and the driving gear (16) is connected with the other driven gear (17) through an idler gear (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310137146.XA CN115923333B (en) | 2023-02-20 | 2023-02-20 | Silk screen printing drying device for printed circuit board |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310137146.XA CN115923333B (en) | 2023-02-20 | 2023-02-20 | Silk screen printing drying device for printed circuit board |
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| CN115923333A true CN115923333A (en) | 2023-04-07 |
| CN115923333B CN115923333B (en) | 2023-05-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116749637A (en) * | 2023-08-21 | 2023-09-15 | 四川英创力电子科技股份有限公司 | Device and method for full-automatic efficient silk-screen printing of characters on circuit board |
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