Roller transfer printing device for printed circuit board

Abstract

The utility model discloses a roller transfer printing device for a printed circuit board. The roller transfer printing device comprises a mounting rack, a conveying mechanism, a first mounting seat, a second mounting seat, a first transfer printing roller mechanism and a second transfer printing roller mechanism, a conveying mechanism is arranged in the middle of the mounting frame in the length direction, and a first transfer printing roller mechanism and a second transfer printing roller mechanism are mounted on the mounting frame in the conveying direction through a first mounting base and a second mounting base correspondingly; and avoiding grooves corresponding to the first transfer printing cylinder mechanism and the second transfer printing cylinder mechanism are formed in the middle of the conveying mechanism. The first transfer printing roller mechanism and the second transfer printing roller mechanism are used for conducting resin transfer printing on the upper side and the lower side of the core plate correspondingly. The first transfer printing cylinder mechanism and the second transfer printing cylinder mechanism each comprise a transmission mechanism, a liquid storage box, a resin transmission roller, a resin gravure cylinder, a transfer printing cylinder and a resin impression cylinder, the core plate is transferred through the roller, gaps do not need to be filled through prepreg flowing glue in the hot pressing process, the irregular effect is reduced, and the uniformity of the thickness of the multi-layer plate is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of circuit board printing, and particularly relates to a roller transfer printing device for printed circuit board. BACKGROUND

[0002] The conventional process of the multilayer printed circuit board is: cutting → inner layer pattern → inner layer AOI → (browning → fusion → plate arrangement → hot pressing → cold pressing → milling plate edge → grinding plate edge) pressing → drilling. In the production links of hot pressing and cold pressing, multiple layers of circuit boards are stacked and processed. However, due to the thickness tolerance of the board material and the semi-cured sheet, and the insufficient flow of the semi-cured sheet to fill the gap of the thick copper layer, the flow of the semi-cured sheet to fill the gap between the copper layers is irregular, resulting in a large thickness tolerance of the multilayer circuit board, usually about ±10%. With the development of electronic circuits, the thickness tolerance needs to be reduced to meet the requirements of assembly accuracy, signal integrity, etc. Currently, the printed circuit board industry often uses silk screen printing resin to fill the gap and then presses. However, due to the high viscosity of the resin, the resin is prone to sticking to the silk screen, making the process difficult to produce and difficult to achieve the desired effect, especially for thin core boards. SUMMARY

[0003] The utility model discloses a kind of roller transfer printing devices for printed circuit board, and the two sides of core board are printed with first transfer printing roller mechanism and second transfer printing roller mechanism, improve the flatness of multilayer circuit board.

[0004] The utility model mainly realizes through following technical scheme:

[0005] A roller transfer printing device for printed circuit board, comprising a mounting frame, a conveying mechanism, a first mounting seat, a second mounting seat, a first transfer printing roller mechanism and a second transfer printing roller mechanism, the middle part of the mounting frame is provided with a conveying mechanism along the length direction, the first transfer printing roller mechanism and the second transfer printing roller mechanism are installed on the mounting frame along the transmission direction through the first mounting seat and the second mounting seat respectively, and the middle part of the conveying mechanism is provided with a avoiding slot corresponding to the first transfer printing roller mechanism and the second transfer printing roller mechanism.

[0006] The first transfer printing roller mechanism and the second transfer printing roller mechanism respectively comprise a transmission mechanism, a liquid storage box and a resin transmission roller, a resin gravure roller, a transfer printing roller and a resin impression roller arranged from outside to inside, the transmission mechanism is used to drive the rotation of the resin transmission roller, the resin gravure roller, the transfer printing roller and the resin impression roller, the resin impression roller and the transfer printing roller are pressure-bonded to each other, and are symmetrically arranged above and below, the core board is located between the resin impression roller and the transfer printing roller, the transfer printing roller and the resin gravure roller are correspondingly arranged, the liquid outlet of the liquid storage box is connected to the resin transmission roller, the liquid outlet of the liquid storage box is arranged along the length direction of the resin transmission roller, and a heating and heat preservation mechanism is arranged at the bottom of the liquid storage box.

[0007] To better realize this utility model, the top of the liquid storage box is provided with a liquid inlet, and a scraper is provided on the side of the liquid storage box near the resin transmission roller, with the scraper located above the liquid outlet.

[0008] To better realize this utility model, one end of the scraper is hinged to the liquid storage box, and a sliding rod is provided on the side of the scraper near the liquid storage box. A sliding seat is provided on the liquid storage box, and the sliding rod is slidably connected to the sliding seat. A spring is provided between the sliding rod and the sliding seat.

[0009] To better realize this utility model, the first mounting base and the second mounting base each include a base body, a movable mounting base, and an arc-shaped mounting groove. The movable mounting base is slidably disposed on one side of the base body and fixed by a locking screw. The liquid storage box and the resin transmission roller are mounted on the movable mounting base. The base body is provided with a mounting shaft corresponding to the resin gravure roller and an arc-shaped mounting groove corresponding to the transfer roller. The resin gravure roller is interference-fitted with the mounting shaft.

[0010] To better realize this utility model, a movable mounting seat is slidably provided on one side of the base body, the movable mounting seat is provided with a mounting hole corresponding to the resin transmission roller, and a vertical groove is provided on one side of the base body corresponding to the mounting hole. The connecting shaft at one end of the resin transmission roller passes through the mounting hole and the vertical groove and is connected to the transmission mechanism.

[0011] To better realize this utility model, a heating mechanism is further provided inside the mounting shaft; cooling fans are respectively provided between adjacent transfer rollers and on the right side of the second transfer roller mechanism.

[0012] To better realize this utility model, it further includes a CCD camera, with CCD cameras respectively provided on the upper and lower sides of the output end of the conveying mechanism.

[0013] This utility model is mainly achieved through the following technical solutions:

[0014] A roller transfer device for printed circuit boards includes a mounting frame, a conveying mechanism, a first mounting base, a second mounting base, a first transfer roller mechanism, and a second transfer roller mechanism. The conveying mechanism is arranged along the length of the middle section of the mounting frame. The first transfer roller mechanism and the second transfer roller mechanism are respectively mounted on the upper and lower sides of the mounting frame via the first mounting base and the second mounting base. A clearance groove is provided in the middle section of the conveying mechanism corresponding to the first and second transfer roller mechanisms.

[0015] The first and second transfer roller mechanisms each include a transmission mechanism, a liquid storage box, and a resin drive roller, a resin gravure roller, and a transfer roller arranged sequentially from the outside to the inside. The transmission mechanism is used to drive the resin drive roller, the resin gravure roller, and the transfer roller to rotate. The transfer rollers of the first and second transfer roller mechanisms are symmetrically arranged on the upper and lower sides and are pressed together. The core plate is located between adjacent transfer rollers. The resin gravure roller is arranged correspondingly to the transfer roller. The liquid outlet of the liquid storage box is connected to the resin drive roller. The liquid outlet of the liquid storage box is arranged along the length direction of the resin drive roller, and a heating and heat preservation mechanism is provided at the bottom of the liquid storage box.

[0016] The beneficial effects of this utility model are as follows:

[0017] (1) This utility model achieves resin printing on both sides of the core board by sequentially setting the first transfer roller mechanism and the second transfer roller mechanism. This utility model uses roller transfer to print the core board, and does not need to fill the gaps by flowing glue through the semi-cured sheet during hot pressing, which reduces the irregular effect and improves the uniformity of the thickness of the multilayer board.

[0018] (2) The present invention facilitates the adjustment of resin transfer uniformity through the design of the scraper; and facilitates the adaptation and replacement of resin gravure rollers and transfer rollers of different sizes through the design of the base, movable mounting base and arc-shaped mounting groove. The heating mechanism and cooling fan can adaptively adjust the resin printing effect, ensuring the quality of roller transfer while preventing smudging during subsequent transport.

[0019] (3) This utility model can achieve simultaneous transfer of the core board on both sides by setting the first transfer roller mechanism and the second transfer roller mechanism on the upper and lower sides. This improves the working efficiency, saves the setting of resin printing roller, saves installation space, improves the uniformity of the thickness of multilayer board, and has good practicality. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the roller transfer device for printed circuit boards according to this utility model;

[0021] Figure 2 This is a schematic diagram of the first and second transfer roller mechanisms.

[0022] Figure 3 This is a schematic diagram showing the working state of the first and second transfer roller mechanisms.

[0023] Figure 4 This is a schematic diagram of the structure of the first transfer roller mechanism;

[0024] Figure 5 This is a schematic diagram of the base structure;

[0025] Figure 6 This is a schematic diagram of the first and second transfer roller mechanisms in Example 2.

[0026] Wherein: 1-mounting frame, 2-first mounting base, 3-second mounting base, 4-first transfer roller mechanism, 5-second transfer roller mechanism, 6-resin drive roller, 7-resin gravure roller, 8-transfer roller, 9-resin impression roller, 10-base body, 11-movable mounting base, 12-arc mounting groove, 13-vertical slide groove. Detailed Implementation

[0027] Example 1:

[0028] A roller transfer device for printed circuit boards, such as Figures 1-5 As shown, the assembly includes a mounting frame 1, a conveying mechanism, a first mounting base 2, a second mounting base 3, a first transfer roller mechanism 4, and a second transfer roller mechanism 5. A conveying mechanism is provided along the length of the middle section of the mounting frame 1, and a clearance groove is provided in the middle of the conveying mechanism corresponding to the first transfer roller mechanism 4 and the second transfer roller mechanism 5. The first transfer roller mechanism 4 and the second transfer roller mechanism 5 are respectively mounted on the left and right ends of the mounting frame 1 via the first mounting base 2 and the second mounting base 3. The first transfer roller mechanism 4 and the second transfer roller mechanism 5 sequentially transfer resin onto the upper and lower sides of the core board.

[0029] like Figures 2-3 As shown, the first transfer roller mechanism 4 and the second transfer roller mechanism 5 respectively include a transmission mechanism, a liquid storage box, and a resin transmission roller 6, a resin gravure roller 7, a transfer roller 8, and a resin impression roller 9 arranged sequentially from the outside to the inside. The transmission mechanism is used to drive the resin transmission roller 6, the resin gravure roller 7, the transfer roller 8, and the resin impression roller 9 to rotate; the resin impression roller 9 and the transfer roller 8 are pressed and rolled against each other, and are arranged symmetrically on top and bottom, with a core plate located between the resin impression roller 9 and the transfer roller 8, and the transfer roller 8 and the resin gravure roller 7 are correspondingly arranged; the liquid outlet of the liquid storage box is received by the resin transmission roller 6, and the liquid outlet of the liquid storage box is arranged along the length direction of the resin transmission roller 6, and a heating and heat preservation mechanism is provided at the bottom of the liquid storage box. The conveying mechanism and the transmission mechanism are existing technologies, so they will not be described in detail.

[0030] Preferably, such as Figure 4 As shown, the top of the liquid storage box is provided with a liquid inlet, and a scraper is provided on the side of the liquid storage box near the resin transmission roller 6, with the scraper positioned above the liquid outlet. Further, one end of the scraper is hinged to the liquid storage box, and a sliding rod is provided on the side of the scraper near the liquid storage box. A sliding seat is provided on the liquid storage box, and the sliding rod is slidably connected to the sliding seat, with a spring positioned between the sliding rod and the sliding seat.

[0031] Preferably, the first mounting base 2 and the second mounting base 3 each include a base body 10, a movable mounting base 11, and an arc-shaped mounting groove 12. The movable mounting base 11 is slidably disposed on one side of the base body 10 and fixed by locking screws. The liquid storage box and the resin transmission roller 6 are mounted on the movable mounting base 11. The base body 10 is provided with a mounting shaft corresponding to the resin gravure roller 7 and with an arc-shaped mounting groove 12 corresponding to the transfer roller 8. The resin gravure roller 7 is interference-fitted with the mounting shaft. Further, as... Figure 5 As shown, a movable mounting seat 11 is slidably provided on one side of the base 10. The movable mounting seat 11 is provided with a mounting hole corresponding to the resin transmission roller 6. A vertical groove 13 is provided on one side of the base 10 corresponding to the mounting hole. The connecting shaft at one end of the resin transmission roller 6 passes through the mounting hole and the vertical groove 13 and is connected to the transmission mechanism.

[0032] Preferably, a heating mechanism is provided inside the mounting shaft; cooling fans are respectively provided between adjacent transfer rollers 8 and on the right side of the second transfer roller mechanism 5. CCD cameras are respectively provided on the upper and lower sides of the output end of the conveying mechanism.

[0033] like Figure 3 As shown, in the process of use, the resin transmission roller 6 adsorbs resin; the resin gravure roller 7 performs gravure transfer of resin, adsorbing resin only at the copper-free positions; the transfer roller 8 receives the resin from the copper-free positions and transfers it to the core board. This invention, through roller transfer, eliminates the need for prepreg to fill gaps during hot pressing, reducing irregularities and thus improving the thickness uniformity of the multilayer board.

[0034] Example 2:

[0035] A roller transfer device for printed circuit boards, such as Figure 6 As shown, the assembly includes a mounting frame 1, a conveying mechanism, a first mounting base 2, a second mounting base 3, a first transfer roller mechanism 4, and a second transfer roller mechanism 5. A conveying mechanism is provided along the length of the middle section of the mounting frame 1, and a clearance groove is provided in the middle of the conveying mechanism corresponding to the first transfer roller mechanism 4 and the second transfer roller mechanism 5. The first transfer roller mechanism 4 and the second transfer roller mechanism 5 are respectively mounted on the upper and lower sides of the mounting frame 1 via the first mounting base 2 and the second mounting base 3. The first transfer roller mechanism 4 and the second transfer roller mechanism 5 simultaneously transfer resin onto the upper and lower sides of the core board, respectively.

[0036] like Figure 6As shown, the first transfer roller mechanism 4 and the second transfer roller mechanism 5 respectively include a transmission mechanism, a liquid storage box, and a resin transmission roller 6, a resin gravure roller 7, and a transfer roller 8 arranged sequentially from the outside to the inside. The transmission mechanism is used to drive the resin transmission roller 6, the resin gravure roller 7, and the transfer roller 8 to rotate. The transfer rollers 8 of the first transfer roller mechanism 4 and the second transfer roller mechanism 5 are arranged symmetrically on the top and bottom and are pressed together. The core plate is located between adjacent transfer rollers 8. The resin gravure roller 7 is arranged correspondingly to the transfer roller 8. The liquid outlet of the liquid storage box is connected to the resin transmission roller 6. The liquid outlet of the liquid storage box is arranged along the length direction of the resin transmission roller 6, and a heating and heat preservation mechanism is provided at the bottom of the liquid storage box.

[0037] In use, this invention employs a resin drive roller 6 to adsorb resin; a resin gravure roller 7 transfers the resin gravurely, adsorbing resin only at locations without a copper layer; and a transfer roller 8 receives the resin from these copper-free locations and transfers it to the core board. This invention, through roller transfer, eliminates the need for prepreg to fill gaps during hot pressing, reducing irregularities and improving the uniformity of multilayer board thickness. Furthermore, the first transfer roller mechanism 4 and the second transfer roller mechanism 5, located on both sides, allow for simultaneous transfer to both sides of the core board, improving work efficiency while eliminating the need for a separate resin impression roller 9, saving installation space, and further enhancing the uniformity of multilayer board thickness, making it highly practical.

[0038] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A roller transfer device for printed circuit boards, characterized in that, The assembly includes a mounting frame (1), a conveying mechanism, a first mounting base (2), a second mounting base (3), a first transfer roller mechanism (4), and a second transfer roller mechanism (5). A conveying mechanism is provided along the length of the middle section of the mounting frame (1). The first transfer roller mechanism (4) and the second transfer roller mechanism (5) are mounted on the mounting frame (1) along the conveying direction via the first mounting base (2) and the second mounting base (3), respectively. A clearance groove is provided in the middle of the conveying mechanism corresponding to the first transfer roller mechanism (4) and the second transfer roller mechanism (5). The first transfer roller mechanism (4) and the second transfer roller mechanism (5) each include a transmission mechanism, a liquid storage box, and components arranged sequentially from the outside to the inside. The resin drive roller (6), resin gravure roller (7), transfer roller (8), and resin impression roller (9) are provided. The transmission mechanism is used to drive the resin drive roller (6), resin gravure roller (7), transfer roller (8), and resin impression roller (9) to rotate. The resin impression roller (9) and transfer roller (8) are pressed and rolled against each other and are arranged symmetrically on the upper and lower sides. The core plate is located between the resin impression roller (9) and transfer roller (8). The transfer roller (8) and resin gravure roller (7) are arranged correspondingly. The liquid outlet of the liquid storage box is connected to the resin drive roller (6). The liquid outlet of the liquid storage box is arranged along the length direction of the resin drive roller (6), and a heating and heat preservation mechanism is provided at the bottom of the liquid storage box.

2. The roller transfer device for printed circuit boards according to claim 1, characterized in that, The top of the liquid storage box is provided with a liquid inlet, and a scraper is provided on the side of the liquid storage box near the resin transmission roller (6), with the scraper located above the liquid outlet.

3. The roller transfer device for printed circuit boards according to claim 2, characterized in that, One end of the scraper is hinged to the liquid storage box, and a sliding rod is provided on the side of the scraper near the liquid storage box. A sliding seat is provided on the liquid storage box, and the sliding rod is slidably connected to the sliding seat. A spring is provided between the sliding rod and the sliding seat.

4. The roller transfer device for printed circuit boards according to claim 1, characterized in that, The first mounting base (2) and the second mounting base (3) respectively include a base body (10), a movable mounting base (11) and an arc-shaped mounting groove (12). The movable mounting base (11) is slidably disposed on one side of the base body (10) and fixed by a locking screw. The liquid storage box and the resin transmission roller (6) are mounted on the movable mounting base (11). The base body (10) is provided with a mounting shaft corresponding to the resin gravure roller (7) and an arc-shaped mounting groove (12) corresponding to the transfer roller (8). The resin gravure roller (7) is interference-fitted with the mounting shaft.

5. The roller transfer device for printed circuit boards according to claim 4, characterized in that, A movable mounting seat (11) is slidably provided on one side of the seat (10). The movable mounting seat (11) is provided with a mounting hole corresponding to the resin transmission roller (6). A vertical groove (13) is provided on one side of the seat (10) corresponding to the mounting hole. The connecting shaft at one end of the resin transmission roller (6) passes through the mounting hole and the vertical groove (13) and is connected to the transmission mechanism.

6. The roller transfer device for printed circuit boards according to claim 4, characterized in that, A heating mechanism is provided inside the mounting shaft; cooling fans are provided between adjacent transfer rollers (8) and on the right side of the second transfer roller mechanism (5).

7. The roller transfer device for printed circuit boards according to claim 1, characterized in that, It also includes CCD cameras, with CCD cameras respectively installed on the upper and lower sides of the output end of the conveying mechanism.

8. A roller transfer device for printed circuit boards, characterized in that, The system includes a mounting frame (1), a conveying mechanism, a first mounting base (2), a second mounting base (3), a first transfer roller mechanism (4), and a second transfer roller mechanism (5). The mounting frame (1) has a conveying mechanism in the middle along its length. The first transfer roller mechanism (4) and the second transfer roller mechanism (5) are mounted on the upper and lower sides of the mounting frame (1) respectively through the first mounting base (2) and the second mounting base (3). The conveying mechanism has a clearance groove in the middle corresponding to the first transfer roller mechanism (4) and the second transfer roller mechanism (5). The first transfer roller mechanism (4) and the second transfer roller mechanism (5) respectively include a transmission mechanism, a liquid storage box, and a resin transmission roller (6), a resin gravure roller (7), and a transfer roller (8) arranged sequentially from the outside to the inside. The transmission mechanism is used to drive the resin transmission roller (6), the resin gravure roller (7), and the transfer roller (8) to rotate. The transfer rollers (8) of the first transfer roller mechanism (4) and the second transfer roller mechanism (5) are arranged symmetrically on the top and bottom and are pressed together. The core plate is located between adjacent transfer rollers (8). The resin gravure roller (7) and the transfer roller (8) are arranged correspondingly. The liquid outlet of the liquid storage box is connected to the resin transmission roller (6). The liquid outlet of the liquid storage box is arranged along the length direction of the resin transmission roller (6), and a heating and heat preservation mechanism is provided at the bottom of the liquid storage box.

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