Circuit board sealing device
Patent Information
- Application Number
- CN202521500280.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-17
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-07-17
AI Technical Summary
[0002]电路板安装到壳体内之后，通过采取封胶处理，能够增加电路板的防水防潮能力，同时增强抗振动和抗冲击的能力，增强长期工作的可靠性，在对壳体内的电路板封胶时，需要用到封胶装置，现有的封胶装置需要工作人员手动将安装有电路板的壳体放置到注胶口处，然后将完成注胶的壳体取走，整个过程人工参与的过程较多，封胶效率较低
该种封胶装置在使用时，工作人员只需要负责向送料段内放置壳体即可，后续壳体的移动、注胶以及注胶后壳体的转移均不需要人工参与，人工由主要的参与者转变成辅助者的角色，通过程序化的封胶作业，能够提高壳体的封胶效率，使用效果好。
Smart Images
Figure CN224823179U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of circuit board encapsulation technology, specifically a circuit board encapsulation device. Background Technology
[0002] After the circuit board is installed in the housing, sealing it with glue can increase its waterproof and moisture-proof capabilities, as well as enhance its vibration and shock resistance, thereby improving its long-term reliability. When sealing the circuit board in the housing, a sealing device is required. Existing sealing devices require workers to manually place the housing with the circuit board installed at the glue injection port, and then remove the housing after glue injection. The whole process involves a lot of manual intervention and has low sealing efficiency. Utility Model Content
[0003] The purpose of this invention is to provide a circuit board encapsulation device, which aims to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: the circuit board sealing device includes: Control panel; The glue injection section is used to inject glue into the housing on which the circuit board is mounted; A lifting unit is provided on the operating table, and a glue injection unit is provided on the lifting unit. The lifting unit is used to control the up and down movement of the glue injection unit. The feeding section is used to place the housing with the circuit board mounted on it and to transport the housing with the circuit board mounted on it to the processing area below the dispensing section for dispensing.
[0005] Preferably, the glue injection section includes a flow valve, which has a glue inlet and a glue outlet. A glue inlet pipe is provided at the glue inlet of the flow valve, and a glue outlet pipe is provided at the glue outlet of the flow valve.
[0006] Preferably, the lifting unit includes a support frame mounted on the operating table. The support frame has an internal partition. Tracks are respectively mounted on both sides of the support frame below the partition. Slider blocks that cooperate with the tracks are respectively mounted on both sides of the flow valve. The lower ends of the two tracks are connected by a limiting plate. A through hole for the dispensing tube to pass through is provided on the limiting plate. A fixing rod I is mounted on the upper end of the flow valve. The fixing rod I passes through the partition and is slidably connected to it. A baffle is mounted on the upper end of the fixing rod I. A spring is sleeved on the fixing rod I, located between the baffle and the partition. Threaded holes are provided on the baffle and the fixing rod I. Bolts are threaded into the threaded holes. A rotating shaft is mounted on the support frame. A motor for driving the rotating shaft is mounted on the support frame. A cam is mounted on the rotating shaft. The outer surface of the cam always maintains contact with the upper surface of the bolt.
[0007] Preferably, the feeding section includes a feeding section and a processing section. The upper surface of the feeding section is inclined, and the upper surface of the processing section is horizontal. The feeding section and the processing section are connected by a smooth curved surface section. Side plates are provided on both sides of the feeding section and the processing section. Pressure plates are provided on the side plates on both sides of the processing section. A sleeve is provided on one side of the processing section. A through groove communicating with the sleeve is opened on one side plate of the feeding section. A push block is provided inside the sleeve. An electric push rod is provided on the operating table. A fixed rod II is provided at one end of the push block. The output end of the electric push rod is connected to the fixed rod II through a fixed plate.
[0008] Preferably, the upper surface of the push block is uniformly provided with grooves, the upper surface of the processing section is provided with a pressure plate, the lower surface of the pressure plate is provided with an installation groove, the interior of the installation groove is provided with a top plate, and the lower surface of the top plate is uniformly provided with elastic sheets.
[0009] The beneficial effects of this utility model are: When using this sealing device, the operator only needs to place the shell into the feeding section. The subsequent movement of the shell, glue injection, and transfer of the shell after glue injection do not require manual intervention. The operator changes from the main participant to an assistant. Through the programmed sealing operation, the sealing efficiency of the shell can be improved, and the effect is good. Attached Figure Description
[0010] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model.
[0011] Figure 2 It is a sectional view of the machining section and the curved surface section.
[0012] Figure 3 This is a cross-sectional view of the feeding section.
[0013] Figure 4 This is a schematic diagram of the push block structure.
[0014] Figure 5 This is a top view of the casing being transferred onto the conveyor belt.
[0015] In the diagram: 1. Operating table; 2. Conveyor belt; 3. Housing; 4. Feeding frame; 5. Flow valve; 6. Inlet pipe; 7. Outlet pipe; 8. Support frame; 9. Partition plate; 10. Track; 11. Slider; 12. Limiting plate; 13. Fixed rod I; 14. Baffle; 15. Spring; 16. Bolt; 17. Rotating shaft; 18. Motor; 19. Cam; 20. Feeding section; 21. Processing section; 22. Curved surface section; 23. Side plate; 24. Pressure plate; 25. Sleeve; 26. Push block; 27. Electric push rod; 28. Fixed rod II; 29. Fixed plate; 30. Groove; 31. Top plate; 32. Bottom plate; 33. Elastic sheet. Detailed Implementation
[0016] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.
[0017] like Figure 1-5 As shown, a circuit board encapsulation device includes: Control panel 1; The glue injection section is used to inject glue into the housing 3 on which the circuit board is mounted; The lifting unit is located on the operating table 1, and the glue injection unit is located on the lifting unit. The lifting unit is used to control the up and down movement of the glue injection unit. The feeding section is used to place the housing 3 with the circuit board installed, and to transport the housing 3 with the circuit board installed to the processing area below the dispensing section for dispensing.
[0018] Furthermore, the dispensing unit includes a flow valve 5, which has a dispensing port and a dispensing port. A dispensing pipe 6 is provided at the dispensing port of the flow valve 5, and a dispensing pipe 7 is provided at the dispensing port of the flow valve 5.
[0019] The flow valve 5 is electromagnetic and can control the flow of fluid sealant by sending a signal from the PLC. The sealant can be any one of epoxy resin, polyurethane, acrylate, thermally conductive adhesive, etc. The inlet pipe 6 is connected to an external sealant source, which can provide sealant to the inlet pipe 6. The sealant source includes modules such as a sealant storage tank and a pump, which can provide sufficient sealant to the flow valve 5.
[0020] The inlet hose 6 is a flexible hose, and the outlet hose 7 is a steel pipe with an inner diameter of 2mm.
[0021] Furthermore, the lifting unit includes a support frame 8 mounted on the operating table 1. A partition 9 is installed inside the support frame 8. Rails 10 are respectively installed on both sides of the support frame 8 below the partition 9. Slider blocks 11 that cooperate with the rails 10 are respectively installed on both sides of the flow valve 5. The lower ends of the two rails 10 are connected by a limiting plate 12. The limiting plate 12 has a through hole for the dispensing tube 7 to pass through. A fixing rod I 13 is installed at the upper end of the flow valve 5. The fixing rod I 13 passes through the partition 9 and is connected to the partition. 9. A sliding connection is provided. A baffle 14 is provided at the upper end of the fixed rod I 13. A spring 15 is sleeved on the fixed rod I 13. The spring 15 is located between the baffle 14 and the partition 9. Threaded holes are provided on the baffle 14 and the fixed rod I 13. Bolts 16 are threadedly connected inside the threaded holes. A rotating shaft 17 is provided on the support frame 8. A motor 18 for driving the rotating shaft 17 to rotate is provided on the support frame 8. A cam 19 is provided on the rotating shaft 17. The outer surface of the cam 19 always keeps in contact with the upper surface of the bolt 16.
[0022] When controlling the dispensing tube 7 to move up or down, the motor 18 is started first, which drives the rotating shaft 17 to rotate. When the rotating shaft 17 rotates, it can drive the cam 19 to rotate. At the same time, the spring 15 can push the baffle 14 to move upward, so that the upper surface of the bolt 16 is always in contact with the surface of the cam 19. When the cam 19 rotates one revolution, the dispensing tube 7 can pass through the lowest and highest ends it can reach. Through the cooperation of the slider 11 and the track 10, the flow valve 5 can move stably up and down within the support frame 8. The limiting plate 12 can prevent the slider 11 from separating from the track 10.
[0023] When it is necessary to change the position of the lowest end of the dispensing tube, the bolt 16 can be rotated to enter the baffle 14 and the fixing rod I 13, thereby adjusting the lowest position that the dispensing tube can move to. When the bolt 16 is screwed out of the baffle 14 and the fixing rod I 13 for a certain length, the lowest position that the dispensing tube can move to can be lowered, so as to adapt to different specifications of housings 3 that need to be sealed.
[0024] Motor 18 is a servo motor 18, controlled by a PLC system. Within the allowable error range, the output end of motor 18 can be controlled to rotate a predetermined angle through pulse signals and other means. At the same time, the speed of motor 18 needs to be controlled so that the dispensing hose 7 can maintain a suitable speed for rising and falling.
[0025] When sealant needs to be injected into the housing 3, when the housing 3 reaches directly below the dispensing tube 7, the dispensing tube 7 needs to be moved downward by the motor 18. By adjusting the position of the adjusting bolt 16, the lower end of the dispensing tube 7 can be inserted into the housing 3. When the lower end of the dispensing tube 7 is at its lowest position, there is a distance of about 2mm between the lower end of the dispensing tube 7 and the circuit board installed in the housing 3. Then the motor 18 stops rotating, and a certain amount of sealant is poured into the housing 3 through the flow valve 5 and the dispensing tube 7. At the same time, the dispensing speed needs to be controlled. If 50ml of sealant needs to be added to a single housing 3, the dispensing speed of the sealant is about 10ml / s. When the amount of sealant entering the housing 3 is about 15ml, the sealant in the housing 3 can submerge the lower end of the dispensing tube 7, so that the dispensing tube 7 can dispense sealant stably and reduce the amount of air entering the sealant.
[0026] After the predetermined amount of sealant has been applied, the control motor 18 is started, causing the lower outlet of the dispensing tube 7 to move to its highest position, waiting for the next housing 3 to be dispensed. Some of the sealant adhering to the dispensing tube 7 will not drip off the dispensing tube 7 for a short period of time, which is about 8 seconds.
[0027] The cam 19 rotates 180° each time, so the cam 19 can be rotated 180° by the motor 18. In the initial state, when the cam 19 contacts the bolt 16, the lower end of the dispensing tube 7 is at the highest position. When the cam 19 rotates 180°, the lower end of the dispensing tube 7 is at the lowest position.
[0028] Furthermore, the feeding section includes a feeding section 20 and a processing section 21. The upper surface of the feeding section 20 is inclined, and the upper surface of the processing section 21 is horizontal. The feeding section 20 and the processing section 21 are connected by a smooth curved section 22. Side plates 23 are provided on both sides of the feeding section 20 and the processing section 21. Pressure plates 24 are provided on the side plates 23 on both sides of the processing section 21. A sleeve 25 is provided on one side of the processing section 21. A through groove is opened on the side plate 23 of the feeding section 20, which is connected to the sleeve 25. A push block 26 is provided inside the sleeve 25. An electric push rod 27 is provided on the operating table 1. A fixing rod II 28 is provided at one end of the push block 26. The output end of the electric push rod 27 is connected to the fixing rod II 28 through a fixing plate 29.
[0029] The feeding section 20 is used to place the housing 3, which is to be glued and has a circuit board installed inside. The surface of the feeding section 20 is tilted at an angle of 20°. Since the housing 3 has a certain weight, when the housing 3 is placed on the feeding section 20, the housing 3 will move towards the bottom of the feeding section 20 under the action of gravity until it contacts the bottom of the feeding section 20 and then stops moving.
[0030] The surfaces of the feeding section 20, the curved section 22, and the processing section 21 are all metal and are polished to increase their smoothness. At the same time, an oil film or wax film can be sprayed onto the surfaces of the feeding section 20, the curved section 22, and the processing section 21 to further reduce the friction of the housing 3 when it moves on the surfaces of the feeding section 20, the curved section 22, and the processing section 21. However, the surface of the processing section 21 below the support frame 8 needs to be friction treated to make this part have greater friction, thereby increasing the friction between the housing 3 and the processing section 21 to prevent the length of movement of the housing 3 in the processing section 21 from exceeding the predetermined value.
[0031] The pressure plate 24 is used to restrict the movement of the housing 3 within the processing section 21, so that the housing 3 can move stably within the processing section 21.
[0032] The width of the curved section 22 near the feeding section 20 is slightly larger than the width of the other end of the curved section 22, so that the shell 3 entering the bottom of the feeding section 20 can be smoothly pushed into the processing section 21.
[0033] When pushing the housing 3 at the bottom of the feeding section 20 into the curved section 22, the electric push rod 27 needs to be activated first. The output end of the electric push rod 27 retracts and drives the fixed rod II 28 to move through the fixed plate 29. The fixed rod II 28 drives the push block 26 in the sleeve 25 to move. One end of the push block 26 enters the feeding section 20 and pushes the housing 3 at the bottom of the feeding section 20 into the curved section 22. The housing 3 originally located in the curved section 22 is squeezed and pushed into the processing section 21 by the newly pushed housing 3. The housing 3 located in the processing section 21 can move stably and enter directly below the glue outlet pipe 7. Glue is injected into the housing 3 through the glue outlet pipe 7.
[0034] Each time the push block 26 moves, the length of the housing 3 is longer than the length of the housing 3. When the push block 26 pushes the housing 3 in the feeding section 20 into the curved section 22, it is necessary to control the retraction speed of the output end of the electric push rod 27. This can be controlled by the PLC controller to make the output end of the electric push rod 27 move slowly and smoothly to avoid collisions between different housings 3. When the electric push rod 27 pushes the housing 3 to move, the distance that the housing 3 located below the support frame 8 moves each time is approximately the same as the length of the housing 3.
[0035] When the pusher block 26 pushes the housing 3, the side of the pusher block 26 can block the other housings 3 on the feeding section 20. In order to avoid the housings 3 in the feeding section 20 from tilting, when the pusher block 26 exits from the feeding section 20, the exit of the pusher block 26 needs to be kept at a relatively fast speed so that the housings 3 in the feeding section 20 can slide down stably.
[0036] A material feeding frame 4 can be set on the operating table 1 to store the shells 3 to be injected with glue. A conveyor belt 2 is set on one side of the operating table 1. The upper surface of the conveyor belt 2 is slightly lower than the upper surface of the processing section 21 by about 1 mm, so that the shells 3 that have been injected with glue after being removed from the processing section 21 can be transferred to the conveyor belt 2 and then transferred out by the conveyor belt 2. The conveyor belt 2 is always in working condition to avoid the shells 3 from accumulating on the conveyor belt 2. The shells 3 that are conveyed out by the conveyor belt 2 are transferred out by the staff and placed in a designated area for curing.
[0037] Furthermore, the upper surface of the push block 26 is uniformly provided with grooves 30, the upper surface of the processing section 21 is provided with a top plate 31, the lower surface of the top plate 31 is provided with an installation groove, the interior of the installation groove is provided with a bottom plate 32, and the lower surface of the bottom plate 32 is uniformly provided with elastic sheets 33.
[0038] When the pusher block 26 moves, the continuous impact between the elastic sheet 33 and the groove 30 causes the feeding section 20 to vibrate at a low intensity, so as to minimize the possibility of the housing 3 getting stuck in the feeding section 20. At the same time, when the staff puts the housing 3 into the feeding section 20, they need to pay attention to the feeding situation of the housing 3 and promptly detect and resolve the problem of the housing 3 getting stuck.
[0039] The elastic sheet 33 can be a metal sheet, and the base plate 32 can be plastic. The elastic sheet 33 is embedded in the base plate 32, and both the elastic sheet 33 and the base plate 32 can be plastic.
[0040] When injecting glue into the housing 3, the housing 3, equipped with a guide plate, needs to be neatly placed into the feeding section 20 first. Under the action of gravity, the housing 3 can move to the bottom of the feeding section 20. Then, the pusher block 26 pushes the housing 3 at the bottom of the feeding section 20 into the curved section 22. By continuously pushing the housing 3 that has entered the bottom of the feeding section 20 into the curved section 22, the housing 3 can enter the processing section 21 from the curved section 22. When the housing 3 moves directly below the glue outlet pipe 7, the pusher block 26 stops pushing the feeding section 20... The inner housing 3 is pushed to the curved section 22. At this time, the lower end of the dispensing tube 7 is moved to the lowest position by the motor 18. Then, a predetermined amount of sealant is injected into the housing 3. After the sealant is injected into a single housing 3, the dispensing tube 7 is moved upward by the motor 18. When the dispensing tube 7 moves to the highest position, the pusher block 26 continues to push the housing 3 in the feeding section 20 into the curved section 22. At this time, a new housing 3 enters below the dispensing tube 7, and sealant is injected into the housing 3 through the dispensing tube 7.
[0041] The actions of components such as the electric push rod 27, the motor 18, and the flow valve 5 are all controlled by the PLC to achieve precise glue injection into the housing 3.
[0042] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
Claims
1. A circuit board encapsulation device, characterized in that, include: Control panel; The glue injection section is used to inject glue into the housing on which the circuit board is mounted. The glue injection section includes a flow valve, which has a glue inlet and a glue outlet. A glue inlet tube is provided at the glue inlet of the flow valve, and a glue outlet tube is provided at the glue outlet of the flow valve. The lifting unit is mounted on the operating table, and the dispensing unit is mounted on the lifting unit. The lifting unit is used to control the up and down movement of the dispensing unit. The lifting unit includes a support frame mounted on the operating table. The support frame has a partition inside. Tracks are respectively mounted on both sides of the support frame below the partition. Slider blocks that cooperate with the tracks are respectively mounted on both sides of the flow valve. The lower ends of the two tracks are connected by a limiting plate. The limiting plate has a through hole for the dispensing tube to pass through. A fixing rod I is mounted on the upper end of the flow valve. The fixing rod I passes through the partition and is slidably connected to the partition. A baffle is mounted on the upper end of the fixing rod I. A spring is sleeved on the fixing rod I. The spring is located between the baffle and the partition. Threaded holes are opened on the baffle and the fixing rod I. Bolts are threaded into the threaded holes. A rotating shaft is mounted on the support frame. A motor for driving the rotating shaft is mounted on the support frame. A cam is mounted on the rotating shaft. The outer surface of the cam always keeps in contact with the upper surface of the bolt. The feeding section is used to place the housing with the circuit board installed and to transport the housing with the circuit board installed to the processing area below the glue dispensing section for glue dispensing. The feeding section includes a feeding section and a processing section. The upper surface of the feeding section is inclined, and the upper surface of the processing section is horizontal. The feeding section and the processing section are connected by a smooth curved section. Side plates are provided on both sides of the feeding section and the processing section. Pressure plates are provided on the side plates on both sides of the processing section. A sleeve is provided on one side of the processing section. A through groove is opened on one side plate of the feeding section, which is connected to the sleeve. A push block is provided inside the sleeve. An electric push rod is provided on the operating table. A fixed rod II is provided at one end of the push block. The output end of the electric push rod is connected to the fixed rod II through a fixed plate.
2. The circuit board encapsulation device according to claim 1, characterized in that, The upper surface of the push block is uniformly provided with grooves, the upper surface of the processing section is provided with a top plate, the lower surface of the top plate is provided with an installation groove, the interior of the installation groove is provided with a bottom plate, and the lower surface of the bottom plate is uniformly provided with elastic sheets.