CN115923333B - Silk screen printing drying device for printed circuit board - Google Patents
Silk screen printing drying device for printed circuit board Download PDFInfo
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- CN115923333B CN115923333B CN202310137146.XA CN202310137146A CN115923333B CN 115923333 B CN115923333 B CN 115923333B CN 202310137146 A CN202310137146 A CN 202310137146A CN 115923333 B CN115923333 B CN 115923333B
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Abstract
The invention provides a silk screen printing and drying device for a printed circuit board, which belongs to the field of equipment for producing the printed circuit board and comprises the following components: the drying box is provided with a feeding track, a middle track and a discharging track which are all in a horizontal state at intervals from top to bottom on the same side, a pushing device is arranged on the opposite side of the drying box corresponding to the middle track and the discharging track, and a lifting mechanism is arranged in the drying box and used for bearing the circuit board and transferring the circuit board from top to bottom; the screen printing frame comprises an upper screen printing plate positioned above the feeding track and a lower screen printing plate positioned above the middle track, wherein the top surfaces of the upper screen printing plate and the lower screen printing plate are respectively provided with a scraper component, the upper screen printing plate is used for screen printing carbon oil to a circuit board on the feeding track, the lower screen printing plate is used for screen printing protective glue to a carbon oil layer on the surface of the circuit board on the middle track, and the screen printing frame is arranged in a moving mode along the vertical direction. The device has compact structure, is convenient to arrange, and effectively reduces the input cost of equipment.
Description
Technical Field
The invention belongs to the technical field of equipment for producing printed circuit boards, and particularly relates to a silk-screen drying device for a printed circuit board.
Background
A printed circuit board (Printed Circuit Board, abbreviated as PCB) is an important electronic component that serves as a support for the electronic component and as a carrier for the electrical connection of the electronic component. In the manufacture of printed circuit boards, carbon oil is often used, and the carbon oil is ink composed of conductive carbon powder and resin, and the ink can play roles in conducting and adjusting resistance. The general purpose of the carbon oil is to design keys or manufacture surface resistance, and the carbon oil is processed by screen printing the carbon oil and then drying the carbon oil, so as to form a carbon oil layer. The carbon oil layer has conductivity, so after the carbon oil is processed, surface treatment such as electroless nickel-gold plating, electroless silver plating, electroless tin plating and the like is carried out, but the surface treatment can deposit metal on the surface of the carbon oil layer, so that the resistance value of the carbon oil layer is changed, and the use is affected. If the surface treatment is carried out before the carbon oil layer is produced, the treated surface, especially electroless silver plating and electroless tin plating, is easily rubbed during the silk screen printing of the carbon oil.
The existing mode is to screen print a layer of protective glue on the surface of a carbon oil layer, dry and solidify the protective glue, then carry out surface treatment, finally remove the protective glue to obtain a complete carbon oil layer, and ensure the surface quality of a circuit board. However, the process needs to be carried out by two silk-screen printing and two drying processes, and in order to realize continuous production, the existing equipment is generally provided with independent silk-screen printing and drying equipment, so that the input cost of the equipment is increased, and the equipment occupies a large indoor space, so that the equipment is inconvenient to arrange.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides the silk-screen printing and drying device for the printed circuit board, which has a compact structure, is convenient to arrange, and effectively reduces the input cost of equipment.
In order to achieve the object of the invention, the following scheme is adopted:
a printed circuit board silk screen drying device, comprising: the drying box is used for drying the circuit board, a feeding track, a middle track and a discharging track which are all in a horizontal state are sequentially arranged on the same side of the drying box at intervals from top to bottom, pushing devices are respectively arranged on the opposite side of the drying box corresponding to the middle track and the discharging track and used for pushing the circuit board in the drying box to the middle track and the discharging track respectively, and a lifting mechanism is arranged in 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 being located the last silk screen printing board of feeding track top and being located the lower silk screen printing board of middle track top, goes up the top surface of silk screen printing board and lower silk screen printing board and all is equipped with the scraper blade subassembly, goes up the circuit board silk screen printing carbon oil that the silk screen printing board is used for on the feeding track, and lower silk screen printing board is used for on the carbon oil layer of circuit board surface on the middle track silk screen printing protection glue, and the stoving case is sent into to feeding track and middle track all can be sent into the circuit board, and the silk screen printing frame removes along vertical direction and sets up.
Further, the top surfaces of the feeding track and the middle track are 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, the top surface of middle track all is rectangular array and is equipped with the second gas pocket of multirow, and the second gas pocket all inclines towards the party that deviates from the stoving case, and the second gas pocket all communicates with the air pump for blow to middle orbital top surface.
Further, both sides of feeding track and middle track top surface all are equipped with the blend stop, and the blend stop removes along the direction of perpendicular to feeding track and middle track top surface and sets up, and under last silk screen printing board and lower silk screen printing board's the pushing down effect, the blend stop can be hidden to in corresponding feeding track and the middle track.
Further, the top surface that stoving case one end was kept away from to the middle track is equipped with the overhead gage, and the overhead gage removes along the direction of perpendicular to middle track top surface and sets up, under the push down effect of lower silk screen printing board, in the overhead gage can hide to the middle track.
Further, the bottom surface that goes up silk screen printing board and is 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 top surface of feeding track has offered corresponding lower baffle and has dodged the groove, is used for holding lower baffle.
Further, two sets of scraper assemblies are parallel to each other, the both ends that the silk screen printing frame corresponds the scraper assembly all are equipped with the slide bar, the both ends sliding connection of scraper assembly is in the slide bar, the both sides of silk screen printing frame all are equipped with the swinging arms, the middle part rotation of swinging arms is connected in the silk screen printing frame, two swinging arms pivoted axis is coaxial and be on a parallel with the scraper assembly, the bar hole has all been seted up along length direction at the both ends of swinging arms, the tip slip of scraper assembly is located in the bar hole, the silk screen printing frame has a telescoping device, telescoping device's telescopic rod tip links to each other with one of them a set of scraper assembly, the telescopic rod is on a parallel with the slide bar.
Further, the scraper assembly comprises a middle rod and scrapers arranged on two sides of the middle rod, a space between the scrapers is used for containing carbon oil or protective glue, and a through hole is formed in the middle of the middle rod and used for adding the carbon oil or the protective glue.
Further, elevating system in the stoving case includes two rows of conveyer belts of vertical setting, and the rotation direction of two rows of conveyer belts 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 the gyro wheel track on two rows of conveyer belts is used for supporting the circuit board in pairs, thereby drives the circuit board from the top down through the rotation of conveyer belt.
Further, 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, the rotating end parts of the same ends of the two rows of conveyor belts are respectively provided with a driven gear, the driving gear is directly meshed with one driven gear, and the driving gear is connected with the other driven gear through an idler gear.
The invention has the beneficial effects that: according to the scheme, two times of drying can be realized on the circuit board by using one drying box, the investment of equipment is reduced, the arrangement and the installation of the device are more convenient, and the device can sequentially finish the silk-screen printing work of carbon oil and protective glue, so that the circuit board can realize continuous silk-screen printing and drying, and the production efficiency is effectively ensured; the upper screen printing plate, the lower screen printing plate, the feeding track, the middle track and the discharging track are vertically arranged, so that occupation of the ground is greatly reduced, and arrangement and installation are facilitated.
Drawings
The drawings described herein are for illustration of selected embodiments only and not all possible implementations, and are not intended to limit the scope of the invention.
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 view 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 view of the lifting mechanism in the drying oven.
The marks in the figure: the drying box-1, the pushing device-11, the in-place sensor-12, the conveyor belt-13, the roller track-14, the driving motor-15, the driving gear-16, the driven gear-17, the idler wheel-18, the feeding track-2, the barrier strip-21, the avoiding groove-22, the middle track-3, the first air hole-31, the second air hole-32, the upper barrier-33, the discharging track-4, the lifting device-41, the vertical rod-42, the screen printing frame-5, the upper screen printing plate-51, the lower screen printing plate-52, the scraper component-53, the middle rod-531, the through hole-5311, the scraper-532, the lower barrier-54, the sliding rod-55, the swinging rod-56, the strip hole-561 and the telescopic device-57.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings, but the described embodiments of the present invention are some, but not all embodiments of the present invention.
As shown in fig. 1, 5 and 6, a silk screen printing drying device for a printed circuit board comprises a drying box 1, a silk screen printing frame 5 and the like.
The stoving case 1 is used for drying the circuit board, the same side of stoving case 1 is equipped with feed track 2, middle track 3 and the ejection of compact track 4 that all are the horizontality from top to bottom interval in proper order, the lateral wall of stoving case 1 corresponds feed track 2, middle track 3 and ejection of compact track 4 all offer the through-hole that is used for through the circuit board, the opposite side of stoving case 1 corresponds middle track 3 and ejection of compact track 4 all is equipped with blevile of push 11 for push the circuit board in the stoving case 1 respectively to middle track 3 and ejection of compact track 4, blevile of push 11 is the cylinder, the inside elevating system that is equipped with of stoving case 1 for accept the circuit board and shift the circuit board from the top down.
The silk screen printing frame 5 includes 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, go up silk screen printing board 51 and the top surface of lower silk screen printing board 52 all is equipped with scraper blade subassembly 53, go up silk screen printing board 51 and be used for to the circuit board silk screen printing carbon oil on feeding track 2, lower silk screen printing board 52 is used for going up silk screen printing protection glue to the carbon oil layer on 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 for confirm the adaptation position of circuit board, position detection sensor is proximity switch, silk screen printing frame 5 moves along vertical direction and sets up, in order to adjust the interval between last silk screen printing board 51 and feeding track 2 and between lower silk screen printing board 52 and the middle track 3, thereby the convenience carries out silk screen printing to the circuit board on feeding track 2 and the 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, at least one pair of lifting devices is arranged, 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 so as to keep a vertical moving track, thereby ensuring the installation stability of the screen printing frame 5.
During operation, the circuit board on the feeding track 2 silk screen printed with carbon oil enters the drying box 1 for drying, the lifting mechanism drives the circuit board to move downwards to the same height as the middle track 3, the circuit board is pushed to the middle track 3 under the action of the corresponding pushing device 11, the circuit board enters the drying box 1 again under the action of the middle track 3 after silk screen printing protective glue on the middle track 3 for drying again, then the circuit board continues to move downwards under the driving of the lifting mechanism while drying until the circuit board moves to the state of being flush with the discharging track 4, and then the circuit board is pushed to the discharging track 4 under the action of the corresponding pushing device 11. According to the scheme, two times of drying can be realized on the circuit board by using one drying box 1, the investment of equipment is reduced, and the silk-screen printing work of carbon oil and protective glue can be sequentially completed, so that the circuit board can realize continuous silk-screen printing and drying, and the production efficiency is effectively ensured; the upper screen printing plate 51, the lower screen printing plate 52, the feeding track 2, the middle track 3 and the discharging track 4 are all vertically arranged, so that occupation of the ground is greatly reduced, and arrangement and installation are facilitated.
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 a circuit board to move towards the drying box 1, in order to confirm whether the circuit board moves in place, the side walls of the drying box 1 are provided with in-place sensors 12 corresponding to the height positions of the feeding track 2 and the middle track 3 and are used for detecting in-place signals of the circuit board, and the in-place sensors 12 are proximity switches or photoelectric switches.
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 rectangular array, and the second air holes 32 incline towards one side deviating 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, so as to drive the circuit board output by the drying box 1 to move on the middle rail 3, and simultaneously, the circuit board after primary drying is rapidly cooled, so that the viscosity of the protection glue is prevented from being reduced after encountering the circuit board at high temperature.
Further preferably, as shown in fig. 1 and 3, barrier strips 21 are disposed on two sides of top surfaces of the feeding track 2 and the middle track 3, and are used for limiting positions of the circuit boards in width directions of the feeding track 2 and the middle track 3, the barrier strips 21 are disposed along a direction perpendicular to the top surfaces of the feeding track 2 and the middle track 3, and under the downward pressing action of the upper screen printing plate 51 and the lower screen printing plate 52, the barrier strips 21 can be hidden into the corresponding feeding track 2 and the middle track 3, so as to avoid affecting the bonding effect between the upper screen printing plate 51 and the lower screen printing plate 52 and the circuit boards.
Further preferably, as shown in fig. 3, the top surface of the end, far away from the drying box 1, of the middle rail 3 is provided with an upper baffle 33 for limiting the position of the drying box 1 from entering the circuit board on the middle rail 3, so as to further ensure the position of the circuit board when the circuit board is subjected to screen printing protective glue, the upper baffle 33 is movably arranged along the direction perpendicular to the top surface of the middle rail 3, and under the action of pressing down the lower screen printing plate 52, the upper baffle 33 can be hidden in the middle rail 3, so as to avoid affecting the bonding effect between the lower screen printing plate 52 and the circuit board.
Further preferably, as shown in fig. 4 and 5, a lower baffle plate 54 vertically downward is arranged on the bottom surface of the upper screen printing plate 51, which is close to one end of the drying box 1, and is used for limiting the position of the circuit board fed into the feeding track 2, so that the position of the circuit board in the process of screen printing carbon oil is further determined, an avoidance groove 22 is formed on the top surface of the feeding track 2 corresponding to the lower baffle plate 54 and is used for accommodating the lower baffle plate 54, when the upper screen printing plate 51 is pressed on the circuit board, the lower baffle plate 54 is trapped in the avoidance groove 22, so that the lamination effect between the upper screen printing plate 51 and the circuit board is prevented from being influenced, the screen printing frame 5 moves upward to drive the lower baffle plate 54 to move upward together, and the lower baffle plate 54 is made to be higher than the top surface of the feeding track 2, so that the circuit board can conveniently enter the drying box 1.
Preferably, as shown in fig. 1, 5 and 6, the two groups of scraper assemblies 53 are parallel to each other, the two ends of the screen printing frame 5 corresponding to the scraper assemblies 53 are respectively provided with a sliding rod 55, the two ends of the scraper assemblies 53 are slidably connected to the sliding rods 55, the two sides of the screen printing frame 5 are respectively provided with a swinging rod 56, the middle part of each swinging rod 56 is rotatably connected to the screen printing frame 5, the axes of rotation of the two swinging rods 56 are coaxial and parallel to the scraper assemblies 53, the two ends of each swinging rod 56 are respectively provided with a strip-shaped hole 561 along the length direction, the end parts of the scraper assemblies 53 are slidably arranged in the strip-shaped holes 561, the screen printing frame 5 is provided with a telescopic device 57, the end parts of the telescopic rod of the telescopic device 57 are connected with one group of the scraper assemblies 53, the telescopic link is on a parallel with slide bar 55, when telescoping device 57 passes through telescopic link drive and is connected scraper blade subassembly 53 along slide bar 55 reciprocating motion, swinging arms 56 will simultaneously round the reciprocal swing of axis at middle part to drive another group scraper blade subassembly 53 along slide bar 55 reciprocal swing, two groups scraper blade subassemblies 53 remove simultaneously, thereby the silk screen printing work that carries out carbon oil and protection glue respectively to two circuit boards simultaneously is gone on to accessible last silk screen printing board 51 and lower silk screen printing board 52, reducible equipment's input not only, the structure of being convenient for make silk screen printing frame 5 is compacter, the convenient arrangement, moreover can guarantee the efficiency of silk screen printing simultaneously. In this example, the expansion device 57 may be a cylinder.
Further preferably, as shown in fig. 2, the scraper assembly 53 includes a middle rod 531 and scrapers 532 mounted on two sides of the middle rod 531, the scraper assembly 53 is connected with the strip-shaped holes 561 through two ends of the middle rod 531, and the two ends of the middle rod 531 are respectively provided with rollers or bearings so as to be in rolling connection with the strip-shaped holes 561, so as to reduce friction, the space between the scrapers 532 is used for containing carbon oil or protective glue, so that the scraper assembly 53 can perform silk screen printing during reciprocating motion, and the middle part of the middle rod 531 is provided with a through hole 5311 for adding the carbon oil or the protective glue.
Preferably, as shown in fig. 7, the lifting mechanism in the drying oven 1 comprises two rows of vertically arranged conveyor belts 13, the rotation directions of the two rows of conveyor belts 13 are opposite, the outer wall array of the conveyor belts 13 is provided with roller tracks 14, more specifically, the roller tracks 14 comprise groove-shaped rods with a U-shaped cross section, the U-shaped grooves of the groove-shaped rods are provided with a plurality of rollers along the length direction array, the circuit board can be moved more smoothly by the rollers, the roller tracks 14 are horizontally arranged, and 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 parts of the same ends of the two rows of conveyor belts 13 are all provided with driven gears 17, the driving gear 16 is directly meshed with one of the driven gears 17, the driving gear 16 is connected with the other driven gear 17 through an idler gear 18, and the structure can simultaneously drive the two rows of conveyor belts 13 by using the same driving motor 15 and make the rotating directions of the two rows of conveyor belts 13 opposite.
The foregoing description of the preferred embodiments of the invention is merely exemplary and is not intended to be exhaustive or limiting of the invention. It will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention.
Claims (10)
1. A printed circuit board silk screen printing drying device, characterized by comprising:
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 pushing device (11) is arranged on the 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 in the drying box (1) and used for bearing the circuit board and transferring the circuit board from top to bottom;
the utility model provides a silk screen printing frame (5), including last silk screen printing board (51) that are located feeding track (2) top and be located lower silk screen printing board (52) of 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), go up silk screen printing board (51) and be used for to the circuit board silk screen printing carbon oil on feeding track (2), silk screen printing board (52) are used for going up silk screen printing protection glue to the carbon oil layer on 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), silk screen printing frame (5) are along vertical direction removal setting.
2. The screen printing and drying device for the printed circuit board according to claim 1, wherein a plurality of rows of first air holes (31) are formed in the top surfaces of the feeding track (2) and the middle track (3) in a rectangular array, the first air holes (31) are inclined towards the drying box (1), and 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).
3. The screen printing and drying device for the printed circuit board according to claim 2, wherein a plurality of rows of second air holes (32) are formed in the top surface of the middle rail (3) in a rectangular array, the second air holes (32) are inclined towards one side deviating from the drying box (1), and the second air holes (32) are communicated with an air pump and are used for blowing air to the top surface of the middle rail (3).
4. The device according to 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 arranged in a moving way along the direction vertical to the top surfaces of the feeding rail (2) and the middle rail (3), and the barrier strips (21) can be hidden into the corresponding feeding rail (2) and middle rail (3) under the downward pressing action of the upper screen printing plate (51) and the lower screen printing plate (52).
5. The screen printing and drying device for the printed circuit board according to claim 4, wherein an upper baffle plate (33) is arranged on the top surface of one end, far away from the drying box (1), of the middle rail (3), the upper baffle plate (33) is arranged in a moving mode along the direction perpendicular to the top surface of the middle rail (3), and under the action of downward pressing of the lower screen printing plate (52), the upper baffle plate (33) can be hidden into the middle rail (3).
6. The screen printing and drying device for the printed circuit board according to claim 4, wherein a lower baffle plate (54) 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 into the feeding track (2), and an avoidance groove (22) is formed in the top surface of the feeding track (2) corresponding to the lower baffle plate (54) and used for accommodating the lower baffle plate (54).
7. The screen printing and drying device for the printed circuit board according to claim 1, wherein two groups of scraper assemblies (53) are mutually parallel, sliding rods (55) are arranged at two ends of the screen printing frame (5) corresponding to the scraper assemblies (53), the two ends of the scraper assemblies (53) are connected with the sliding rods (55) in a sliding mode, swinging rods (56) are arranged at two sides of the screen printing frame (5), the middle parts of the swinging rods (56) are rotatably connected with the screen printing frame (5), the rotating axes of the two swinging rods (56) are coaxial and parallel to the scraper assemblies (53), strip-shaped holes (561) are formed in the two ends of the swinging rods (56) in the length direction, the ends of the scraper assemblies (53) are slidably arranged in the strip-shaped holes (561), a telescopic device (57) is arranged on the screen printing frame (5), the end parts of the telescopic rod of the telescopic device (57) are connected with one group of the scraper assemblies (53), and the telescopic rod is parallel to the sliding rods (55).
8. The device according to claim 1 or 7, wherein the scraper assembly (53) comprises a middle rod (531) and scrapers (532) mounted on 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) for adding the carbon oil or the protective glue.
9. The screen printing and drying device for the printed circuit board according to claim 1, wherein the lifting mechanism in the drying box (1) comprises two rows of vertically arranged conveyor belts (13), the rotation directions of the two rows of conveyor belts (13) are opposite, roller tracks (14) are arranged on the outer wall array of the conveyor belts (13), the roller tracks (14) are horizontally arranged, and the roller tracks (14) on the two rows of conveyor belts (13) are arranged in pairs and are used for supporting the circuit board and driving the circuit board 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 board according to claim 1, wherein a driving motor (15) is arranged on the outer wall of the drying box (1), a driving gear (16) is arranged on a main shaft of the driving motor (15), driven gears (17) are arranged at rotating end parts of the same ends of the two rows of conveying 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).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310137146.XA CN115923333B (en) | 2023-02-20 | 2023-02-20 | Silk screen printing drying device for printed circuit board |
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| CN202310137146.XA CN115923333B (en) | 2023-02-20 | 2023-02-20 | Silk screen printing drying device for printed circuit board |
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| CN115923333B true CN115923333B (en) | 2023-05-09 |
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| CN116749637B (en) * | 2023-08-21 | 2023-10-13 | 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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