Surface coating coating device for heat dissipation substrate

Abstract

The surface coating coating device comprises a workbench (1), a substrate placing table (2) is arranged on the workbench (1), a translation seat (3) is arranged on the workbench (1), a coating and printing mechanism (4) is arranged at the moving end of the translation seat (3), and a silk screen mechanism (5) arranged below the coating and printing mechanism (4) is arranged at the fixed end of the translation seat (3); a fixed supporting plate (6) is arranged at the moving end of the translation seat (3) and is close to the coating and printing mechanism (4), a fixed table (7) is arranged on the fixed supporting plate (6), an inclined panel (8) is arranged on one side of the fixed table (7), and a translation assembly (9) is arranged on the inclined panel (8); and a material pump (10) is arranged on one side of the fixed table (7).

Description

Technical Field

[0001] The invention relates to the field of heat dissipation substrate processing equipment, in particular to a surface coating device for a heat dissipation substrate. Background Art

[0002] In order to improve the heat dissipation efficiency of the heat dissipation substrate, a layer of heat dissipation silicone grease will be coated on the surface of the substrate. The silicone grease has high thermal conductivity and can quickly transfer the heat generated by the heating element to the heat dissipation substrate, which is then dissipated into the surrounding environment by the heat dissipation substrate, effectively reducing the temperature of the heating element and ensuring its stable operation. Existing heat dissipation substrate coating devices, such as the Chinese utility model patent with announcement number CN214027710U, discloses a double-transfer adjustable vacuum glass screen printing machine, including a double-transfer screen printing mechanism, the double-transfer screen printing mechanism includes a screen printing machine body, the upper surface of the screen printing machine body is equipped with a transfer structure, the transfer structure includes a fixed plate, the fixed plates are symmetrically arranged, the fixed plates are sequentially provided with an upper guide rail and a lower guide rail, the lower guide rail is located below the upper guide rail, the upper guide rail and the lower guide rail are sequentially provided with an upper vacuum suction plate and a lower vacuum suction plate, the sizes of the upper vacuum suction plate and the lower vacuum suction plate are adapted, a screen printing mesh assembly is arranged above the transfer structure, and the screen printing mesh assembly includes a rectangular mesh with an opening upward. When this type of device is in use, the heat dissipation substrate is set at the lower part of the silk screen screen assembly, and then the heat dissipation silicone grease is manually poured on the silk screen screen assembly, and the heat dissipation silicone grease is evenly spread through the ink scraper assembly and coated on the heat dissipation substrate. However, the dosage of the heat dissipation silicone grease cannot be well controlled when it is manually poured on the silk screen screen. If the dosage is too much, it will cause waste, and if the dosage is too little, the coating will not be in place. Summary of the invention

[0003] The object of the present invention is to provide a surface coating device for a heat dissipation substrate. The present invention realizes uniform discharging through a nozzle discharging structure, stably controls the dosage of heat dissipation silicone grease, improves discharging efficiency, and avoids material waste.

[0004] The technical solution of the present invention is as follows: a surface coating device for a heat dissipation substrate comprises a workbench, a substrate placing table is arranged on the workbench, a translation seat is arranged on the workbench, a printing mechanism is arranged at the moving end of the translation seat, and a screen mechanism is arranged below the printing mechanism at the fixed end of the translation seat; a fixed support plate is arranged on the moving end of the translation seat and close to the printing mechanism, the fixed support plate is provided with a fixed table, an inclined panel is arranged on one side of the fixed table, and a translation assembly is arranged on the inclined panel; a material pump is arranged on one side of the fixed table; a distribution seat is arranged on the moving end of the translation assembly, the inlet end of the distribution seat is connected with the discharge port of the material pump via a pipeline, a plurality of silicone grease flow tube groups connected with the outlet end of the distribution seat are also arranged on the moving end of the translation assembly, a fixed nozzle is arranged at the discharge end of the silicone grease flow tube group, a nozzle arranged toward the screen mechanism is arranged at the end of the fixed nozzle; a plate fixing assembly is arranged on the substrate placing table.

[0005] In the above-mentioned surface coating coating device for the heat dissipation substrate, the translation assembly includes a slider fixed on the inclined panel, the slider is fitted with a slide rail, the slide rail is provided with a slide plate, and the distribution seat and the silicone grease flow tube group are arranged on the slide plate; an inclined fixed plate is provided on one side of the inclined panel, and a cylinder is provided on the inclined fixed plate, and the protruding end of the cylinder is connected to one end of the slide plate.

[0006] In the aforementioned surface coating coating device for the heat dissipation substrate, the screen mechanism includes a side branch connected to the fixed end of the translation seat and symmetrically arranged, a card slot is provided in the side branch, a screen frame is provided between the card slots on both sides, a screen cloth is provided in the screen frame, the coating mechanism is arranged above the screen cloth, and the nozzle is arranged toward the screen cloth.

[0007] In the surface coating coating device of the aforementioned heat dissipation substrate, a rotatable protective frame is provided at the end of the translation seat through a bearing seat, the printing mechanism and the screen mechanism are within the protection range of the protective frame, and a limiting rod is provided at the end of the translation seat for limiting the rotation of the protective frame.

[0008] In the surface coating coating device of the aforementioned heat dissipation substrate, the nozzle includes a first main body connected to a fixed nozzle, one end of the first main body is connected to a second main body; one end of the second main body is provided with a conical surface; two groups of fixed blocks are provided in the first main body, the first main body forms a first chamber, an air pressure chamber and a second chamber through the two groups of fixed blocks, the air pressure chamber is connected to the air pressure source through the air port, and elastic adjusting parts are provided in the two groups of fixed blocks, the working end of the elastic adjusting part is arranged in the first chamber, and the working end of the elastic adjusting part is matched with the conical surface; a delivery pipe for connecting the first chamber and the second chamber is provided in the fixed block.

[0009] In the surface coating coating device of the aforementioned heat dissipation substrate, the elastic adjustment part includes a main rod arranged on two groups of fixed blocks, and the main rod is provided with a push plate located in the air pressure chamber; one end of the main rod is provided with a conical head matching the conical surface, and the main rod is provided with a spring, one end of the spring is connected to the conical head, and the other end of the spring is connected to the fixed block.

[0010] In the surface coating device for the heat dissipation substrate, the substrate placement table includes a rotating motor, a turntable located on the workbench is provided on the rotating end of the rotating motor, and a group of symmetrically arranged platforms are provided on the turntable; the plate fixing assembly is arranged on both sides of the platform.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. In the present invention, the plate body carrying the substrate is placed on the substrate placement table, and the plate body is firmly clamped by the plate body fixing assembly so that the screen mechanism and the substrate are closely fitted. The translation assembly drives the fixed nozzle and the nozzle to approach the screen mechanism, and the material pump extracts the heat dissipating silicone grease to the distribution seat, and the distribution seat then transports the silicone grease to the fixed nozzle through the silicone grease flow pipe group, and finally drips on the screen mechanism in a round shape through the nozzle. This nozzle discharge structure can achieve uniform discharge, accurately and stably control the amount of heat dissipating silicone grease, significantly improve discharge efficiency, and effectively avoid material waste.

[0013] 2. The movable elastic adjustment part in the first body cooperates with the conical surface in the second body to achieve precise control of the discharge amount. The user can conveniently select the appropriate amount of silicone grease according to the size of the substrate. The operation is convenient and flexible, which greatly improves the applicability of the device under different working conditions.

[0014] 3. Multiple substrates are pre-installed on the board body, which is installed on the substrate placement table through the board fixing components on both sides. This modular board placement and clamping method greatly improves the convenience of substrate positioning, effectively reduces the time cost during substrate installation and positioning, and helps to improve overall production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 is a schematic diagram of the screen mechanism;

[0017] Figure 3 is a schematic diagram of a fixed platform;

[0018] Figure 4 is a schematic diagram of a translation component;

[0019] Figure 5 is a schematic diagram of the nozzle;

[0020] Figure 6 A schematic diagram of the main pole;

[0021] Figure 7 is a schematic diagram of a conical surface;

[0022] Explanation of the symbols in the accompanying drawings: 1-working table, 2-substrate placing table, 3-translation seat, 4-printing mechanism, 5-screen mechanism, 6-fixed support plate, 7-fixed table, 8-inclined plate, 9-translation assembly, 10-material pump, 11-distribution seat, 12-silicone grease flow pipe group, 13-fixed nozzle, 14-nozzle, 15-plate fixing assembly, 16-slider, 17-slide rail, 18-slide plate, 19-inclined fixed plate, 20-cylinder, 21 -side branch, 22-slot, 23-net frame, 24-wire mesh, 25-protective frame, 26-limiting rod, 27-first body, 28-second body, 29-conical surface, 30-fixed block, 31-first chamber, 32-air pressure chamber, 33-second chamber, 34-elastic adjustment member, 35-conveying pipe, 36-main rod, 37-push plate, 38-conical head, 39-spring, 40-rotating motor, 41-turntable, 42-platform. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0024] Embodiment: A surface coating device for a heat dissipation substrate comprises a workbench 1, as shown in the attached Figure 1 As shown, a substrate placing table 2 is installed on the workbench 1, a translation seat 3 is installed on the workbench 1, a coating mechanism 4 is installed on the moving end of the translation seat 3, and the coating mechanism includes an ink scraper and an ink return plate, and the silicone grease is evenly spread and coated on the substrate through the ink scraper and the ink return plate; the translation seat is mainly composed of a lifting structure and a lateral moving structure, and a screen mechanism 5 arranged below the coating mechanism 4 is installed on the fixed end of the translation seat 3, as shown in the attached Figure 2 As shown; the screen mechanism 5 includes a side branch 21 connected to the fixed end of the translation seat 3 and symmetrically arranged, a card slot 22 is provided in the side branch 21, a screen frame 23 is installed between the card slots 22 on both sides, a screen cloth 24 is installed in the screen frame 23, and a printing mechanism 4 is arranged above the screen cloth 24. In the heat dissipation application of the power module, thermal grease is sometimes also applied to the surface of the metal substrate of the radiator or component by screen printing. Different screen cloths are replaced for different heat dissipation substrates, and the nozzle 14 is set toward the screen cloth 24. Clamping pins are installed at the card slot, and the screen frame can be removed and replaced by the clamping pins, which is convenient and quick. A fixed support plate 6 is installed on the moving end of the translation seat 3 and close to the printing mechanism 4, and a fixed platform 7 is installed on the fixed support plate 6, as shown in the attached Figure 3As shown, an inclined panel 8 is installed on one side of the fixed platform 7, and a translation component 9 is installed on the inclined panel 8; a material pump 10 is installed on one side of the fixed platform 7, and the material pump will extract silicone grease from the material barrel; a distribution seat 11 is installed on the moving end of the translation component 9, and the inlet end of the distribution seat 11 is connected to the discharge port of the material pump 10 through a pipeline, and a plurality of silicone grease flow tube groups 12 connected to the outlet end of the distribution seat 11 are also installed on the moving end of the translation component 9, and the discharge end of the silicone grease flow tube group 12 is connected to a fixed nozzle 13, and the silicone grease flows into the plurality of silicone grease flow tube groups 12 through the distribution seat, and then flows into the fixed nozzle, and the end of the fixed nozzle 13 is installed with a nozzle 14 arranged toward the screen mechanism 5; a plate fixing component 15 is installed on the substrate placement platform 2. A rotatable protective frame 25 is installed at the end of the translation seat 3 through a bearing seat. The printing mechanism 4 and the screen mechanism 5 are within the protection range of the protective frame 25. A limiting rod 26 is provided at the end of the translation seat 3 for limiting the rotation of the protective frame 25. The printing mechanism and the screen mechanism can be enclosed by the protective frame to reduce the risk of other components touching the two mechanisms.

[0025] The translation assembly 9 includes a slider 16 fixed to the inclined plate 8. Figure 4 As shown, a slide rail 17 is fitted on the slider 16, a slide plate 18 is installed on the slide rail 17, and the distribution seat 11 and the silicone grease flow tube group 12 are arranged on the slide plate 18; an inclined fixed plate 19 is installed on one side of the inclined panel 8, and a cylinder 20 is installed on the inclined fixed plate 19, and the protruding end of the cylinder 20 is connected to one end of the slide plate 18. The slide plate is driven to move by the cylinder to bring the nozzle close to the screen cloth, and the nozzle can be stably moved to the working position. By setting the nozzle to be movable, a larger space is provided for the replacement of the screen cloth.

[0026] The nozzle 14 includes a first body 27 connected to the fixed nozzle 13. Figure 5 As shown, a sealing structure is provided at one end of the first body to improve the sealing between the fixed nozzle and the first body. One end of the first body 27 is connected to the second body 28; one end of the second body 28 has a tapered surface 29; the first body 27 has two sets of fixing blocks 30, and the first body 27 forms a first chamber 31, an air pressure chamber 32 and a second chamber 33 through the two sets of fixing blocks 30. The air pressure chamber 32 is connected to the air pressure source through the air port. The two sets of fixing blocks 30 are provided with elastic adjustment members 34, and the working end of the elastic adjustment member 34 is arranged in the first chamber 31, and the working end of the elastic adjustment member 34 is matched with the tapered surface 29. As shown in the attached Figure 7 As shown; the fixed block 30 has a delivery pipe 35 for connecting the first chamber 31 and the second chamber 33; the elastic adjustment member 34 includes a main rod 36 disposed on two sets of fixed blocks 30, as shown in the attached Figure 6As shown, the main rod 36 is provided with a push plate 37 located in the air pressure chamber 32; one end of the main rod 36 is provided with a conical head 38 that matches the conical surface 29, and a spring 39 is installed on the main rod 36, one end of the spring 39 is connected to the conical head 38, and the other end of the spring 39 is connected to the fixed block 30. When the entire heat dissipation substrate surface coating coating device starts to work, the material pump 10 is started to extract liquid silicone grease from the material barrel, and the silicone grease is diverted through the distribution seat 11, enters the fixed nozzle 13, and reaches the second chamber 33 of the nozzle 14. At this time, the air pressure chamber 32 is not passed through compressed air. Under the action of the spring 39, the conical head 38 on the main rod 36 is tightly against the conical surface 29 of the second body 28, and the first chamber 31 is in a sealed state with the outside world, and the silicone grease cannot flow out of the nozzle 14; when the silicone grease spraying operation is required, the air pressure source passes compressed air into the air pressure chamber 32 through the air port. , compressed air pushes the push plate 37, and since the push plate 37 is fixedly sleeved on the main rod 36, the main rod 36 moves toward the second chamber 33; the conical head 38 at the front end of the main rod 36 also moves away from the conical surface 29, forming an annular discharge gap between the conical head 38 and the conical surface 29. At this time, the silicone grease in the second chamber 33 flows into the first chamber 31 through the delivery pipe 35 in the fixed block 30 under the pressure generated by the material pump 10, and then passes through the discharge gap between the conical head 38 and the conical surface 29, and is sprayed from the nozzle 14 and sprayed onto the screen cloth 24 on the surface of the heat dissipation substrate. The user can conveniently select the appropriate silicone grease dosage according to the size of the substrate, which is convenient and flexible to operate, greatly improving the applicability of the device under different working conditions.

[0027] When the amount of silicone grease discharged needs to be increased, the air pressure in the air pressure chamber 32 is increased. The thrust of the air pressure on the push plate 37 is greater than the elastic force of the spring 39, and the conical head 38 is further away from the conical surface 29, so that the discharge gap is increased. The larger discharge gap allows more silicone grease to pass through in the same time, thereby increasing the discharge amount.

[0028] When it is necessary to reduce the amount of silicone grease discharged, the air pressure in the air pressure chamber 32 is lowered, and the main rod 36 drives the conical head 38 to approach the conical surface 29 under the drive of the elastic force of the spring 39, and the discharge gap is reduced; for example, when micro-flow control is required, the discharge gap can be reduced to 0.1-0.3mm, so that the amount of silicone grease passing through per unit time is reduced, thereby achieving precise control of the discharge amount.

[0029] When a spraying operation is completed or the discharge of silicone grease needs to be stopped, the connection between the air pressure source and the air pressure chamber 32 is cut off, and the air pressure in the air pressure chamber 32 drops rapidly. Under the action of the spring 39, the main rod 36 drives the conical head 38 to quickly reset and fit tightly on the conical surface 29 again, sealing the first chamber 31 again to prevent the silicone grease from continuing to flow out, thereby preventing the silicone grease from dripping and causing pollution to the equipment and the substrate.

[0030] The substrate placement table 2 includes a rotating motor 40, and a turntable 41 located on the workbench 1 is provided on the rotating end of the rotating motor 40, and a group of symmetrically arranged platforms 42 are provided on the turntable 41; the plate body fixing assembly 15 is arranged on both sides of the platform 42; the corresponding platform can be moved to the bottom of the screen mechanism through the turntable to achieve batch coating of the substrate. The plate body fixing assembly is mainly composed of a linkage rod group and a clamping group. The rod body in the linkage rod group flips to push the sliding of the clamping group, and the clamping group realizes the clamping of the plate body. The end of the clamping group is a rib, and the plate body is placed on the bayonet of the rib. After placement, the screen mechanism avoids contact with the substrate, and then the silicone grease is applied. Multiple substrates are pre-installed on the plate body, and the plate body is installed on the substrate placement table through the plate body fixing assemblies on both sides. This modular plate body placement and clamping method greatly improves the convenience of substrate positioning, effectively reduces the time cost during the substrate installation and positioning process, and helps to improve the overall production efficiency.

[0031] The working principle of the present invention is as follows: the plate body carrying the substrate is placed on the substrate placement table 2, and the plate body fixing assembly 15 is used to firmly clamp the plate body, so that the screen mechanism 5 and the substrate are closely fitted, and the positioning and fixing of the substrate are completed; the material pump 10 extracts the heat dissipation silicone grease from the material barrel and transports it to the distribution seat 11. At the same time, the cylinder 20 in the translation assembly 9 pushes the slide plate 18 to move along the slide rail 17, driving the distribution seat 11, the silicone grease flow pipe group 12, the fixed nozzle 13 and the nozzle 14 to approach the screen mechanism 5; the heat dissipation silicone grease enters the multiple silicone grease flow pipe groups 12 through the distribution seat 11, and then flows into the fixed nozzle 13, and finally drips on the screen cloth 24 in a spherical shape through the nozzle 14. When the silicone grease spraying operation is required, the air pressure source introduces compressed air into the air pressure chamber 32 through the air port, and the compressed air pushes the push plate 37. Since the push plate 37 is fixedly sleeved on the main rod 36, the main rod 36 moves toward the second chamber 33; the conical head 38 at the front end of the main rod 36 also moves away from the conical surface 29, and an annular discharge gap is formed between the conical head 38 and the conical surface 29. At this time, the silicone grease located in the second chamber 33, under the pressure generated by the material pump 10, flows into the first chamber 31 through the conveying pipe 35 in the fixed block 30, and then passes through the discharge gap between the conical head 38 and the conical surface 29, and is sprayed from the nozzle 14, sprayed onto the screen cloth 24 on the surface of the heat dissipation substrate, and the discharge gap is used to achieve accurate control of the outflow dose of the silicone grease; the scraper plate and the ink return plate in the coating mechanism 4 evenly spread the silicone grease dripping on the screen cloth 24, and coat the silicone grease on the surface of the substrate through the screen cloth 24. In addition, the rotary motor 40 of the substrate placement table 2 can drive the turntable 41 to rotate, and move the substrates on different platforms 42 to below the screen mechanism 5 in sequence, so as to achieve batch coating of the substrates.

Claims

1. A surface coating device for a heat dissipation substrate, comprising a workbench (1), a substrate placement table (2) being provided on the workbench (1), a translation seat (3) being provided on the workbench (1), a coating mechanism (4) being provided at a movable end of the translation seat (3), and a screen mechanism (5) being provided below the coating mechanism (4) at a fixed end of the translation seat (3); characterized in that: A fixed support plate (6) is provided on the moving end of the translation seat (3) and close to the coating mechanism (4), the fixed support plate (6) is provided with a fixed platform (7), one side of the fixed platform (7) is provided with an inclined panel (8), and the inclined panel (8) is provided with a translation assembly (9); one side of the fixed platform (7) is provided with a material pump (10); a distribution seat (11) is provided on the moving end of the translation assembly (9), and the inlet end of the distribution seat (11) is connected to the discharge port of the material pump (10) through a pipeline; a plurality of silicone grease flow tube groups (12) connected to the outlet end of the distribution seat (11) are also provided on the moving end of the translation assembly (9), and a fixed nozzle (13) is provided at the discharge end of the silicone grease flow tube group (12), and a nozzle (14) arranged toward the screen mechanism (5) is provided at the end of the fixed nozzle (13); a plate body fixing assembly (15) is provided on the substrate placement platform (2).

2. The surface coating coating device of the heat dissipation substrate according to claim 1, characterized in that: The translation assembly (9) includes a slider (16) fixed on the inclined panel (8), the slider (16) is fitted with a slide rail (17), a slide plate (18) is provided on the slide rail (17), and the distribution seat (11) and the silicone grease flow tube group (12) are arranged on the slide plate (18); an inclined fixed plate (19) is provided on one side of the inclined panel (8), and a cylinder (20) is provided on the inclined fixed plate (19), and the protruding end of the cylinder (20) is connected to one end of the slide plate (18).

3. The surface coating coating device of the heat dissipation substrate according to claim 1, characterized in that: The screen mechanism (5) comprises a side branch (21) connected to a fixed end of the translation seat (3) and symmetrically arranged, a clamping groove (22) is arranged in the side branch (21), a screen frame (23) is arranged between the clamping grooves (22) on both sides, a screen cloth (24) is arranged in the screen frame (23), the coating mechanism (4) is arranged above the screen cloth (24), and the nozzle (14) is arranged toward the screen cloth (24).

4. The surface coating coating device for heat dissipation substrate according to claim 1, characterized in that: A rotatable protective frame (25) is provided at the end of the translation seat (3) via a bearing seat, the coating mechanism (4) and the screen mechanism (5) are within the protection range of the protective frame (25), and a limiting rod (26) for limiting the rotation of the protective frame (25) is provided at the end of the translation seat (3).

5. The surface coating coating device for heat dissipation substrate according to claim 1, characterized in that: The nozzle (14) comprises a first body (27) connected to a fixed nozzle (13), one end of the first body (27) being connected to a second body (28); one end of the second body (28) being provided with a tapered surface (29); two groups of fixed blocks (30) being provided in the first body (27); the first body (27) forming a first chamber (31), an air pressure chamber (32) and a second chamber (33) through the two groups of fixed blocks (30); the air pressure chamber (32) being connected to an air pressure source through an air port; elastic adjustment members (34) being provided in the two groups of fixed blocks (30); a working end of the elastic adjustment member (34) being arranged in the first chamber (31), and the working end of the elastic adjustment member (34) being matched with the tapered surface (29); and a delivery pipe (35) for connecting the first chamber (31) and the second chamber (33) being provided in the fixed block (30).

6. The surface coating coating device of the heat dissipation substrate according to claim 5, characterized in that: The elastic adjustment member (34) includes a main rod (36) arranged on two groups of fixed blocks (30), and the main rod (36) is provided with a push plate (37) located in the air pressure chamber (32); one end of the main rod (36) is provided with a conical head (38) matching the conical surface (29), and the main rod (36) is provided with a spring (39), one end of the spring (39) is connected to the conical head (38), and the other end of the spring (39) is connected to the fixed block (30).

7. The surface coating coating device of the heat dissipation substrate according to claim 1, characterized in that: The substrate placement table (2) comprises a rotating motor (40), a rotating disc (41) located on the workbench (1) is provided on the rotating end of the rotating motor (40), and a group of symmetrically arranged platforms (42) are provided on the rotating disc (41); the plate fixing assembly (15) is arranged on both sides of the platform (42).

Images