A dispensing device and a dispensing method for improving the airtightness of plastic-encapsulated parts by dispensing

Abstract

The present application discloses a dispensing device and a dispensing method for improving the airtightness of plastic-encapsulated parts through dispensing, which relates to the technical field of dispensing devices. The present application includes a base, a moving plate is arranged on one side of the base, an adjusting plate is slidably arranged on one side of the moving plate, a workpiece is arranged on the base, a fixing seat is fixedly connected to the top of the adjusting plate, an adjusting member is installed inside the fixing seat, and a housing is installed on one side of the fixing seat. The present application is provided with a driving member and a linkage member. By starting the driving member to operate, the push rod is driven to reciprocate, so that the bottom end of the push rod can push the glue transmitted to the inside of the linkage chamber by the glue delivery pipe to be extruded, realizing the dispensing operation on the workpiece. While the push rod reciprocates cyclically, the fixing piece will drive the linkage member to operate, so that the impeller rotates intermittently inside the glue storage chamber, and the glue inside the glue storage chamber is transmitted to the inside of the linkage chamber in a fixed amount, so as to ensure that the amount of glue extruded each time is evenly fixed and effective control is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of dispensing devices, and in particular to a dispensing device and a dispensing method for improving the airtightness of plastic-encased parts by dispensing. Background Art

[0002] Plastic-encased parts are widely used in new energy fields such as motors and electronic controls. The products have airtightness requirements. Due to the inconsistent shrinkage properties of copper bars and plastics, there will be tiny gaps between the copper bars and plastics after cooling. When the product is in a high-pressure environment, air leakage will occur, affecting the performance of the whole machine. Therefore, by filling glue in the connection area between the plastic and the copper bar, the gas flow can be blocked to meet the airtightness requirements.

[0003] When processing plastic-encased parts, to avoid air leakage between the copper bar and the plastic, it is usually necessary to manually squeeze and apply the glue carefully to the connection area. Through precise dispensing operations, not only can the structural strength and stability of the plastic-encased parts be effectively enhanced, but also the overall aesthetics and durability can be significantly improved, laying a solid foundation for subsequent processing and use.

[0004] During the processing of plastic-encased parts, when dispensing glue on the connection area between the plastic and the copper bar, the amount of glue extruded by the staff is generally not uniform and fixed each time, making it difficult to achieve effective control. Too much or too little glue may have an adverse impact on the bonding effect and appearance quality of the product, resulting in product defects and affecting product quality and production efficiency. For this reason, the present application provides a dispensing device and a dispensing method for improving the airtightness of plastic-encased parts by dispensing. Summary of the Invention

[0005] The purpose of the present application is to solve the problem that too much or too little glue amount may have an adverse impact on the bonding effect and appearance quality of the product, resulting in product defects and affecting product quality and production efficiency. The present application provides a dispensing device and a dispensing method for improving the airtightness of plastic-encased parts by dispensing.

[0006] The present application specifically adopts the following technical solutions to achieve the above purpose:

[0007] A dispensing device and a dispensing method for improving the airtightness of plastic-encapsulated parts by dispensing, including a base. A moving plate is arranged on one side of the base. An adjusting plate is slidably arranged on one side of the moving plate. A workpiece is arranged on the base. A fixing seat is fixedly connected to the top of the adjusting plate. An adjusting member is installed inside the fixing seat. A housing is installed on one side of the fixing seat. A glue storage bin is fixedly connected inside the housing. A cavity is opened inside the housing. A linkage bin is opened inside the housing. The bottom of the glue storage bin is fixedly connected through a glue delivery pipe. The other end of the glue delivery pipe is fixedly connected through the linkage bin. The cavity is communicated with the linkage bin. A fixing plate is fixedly connected inside the linkage bin. A first rotating shaft is rotatably connected inside the cavity. A cam is fixedly connected to the first rotating shaft. A rotating rod is fixedly connected inside the cavity. A connecting plate is rotatably connected to the rotating rod. Both ends of the connecting plate are respectively located inside the cavity and the linkage bin. A driving member is installed inside the cavity. A push rod is slidably connected through the fixing plate. A fixing piece is fixedly connected to the push rod. A first spring is sleeved on the push rod. The top of the first spring is fixedly connected to the bottom of the fixing piece. The bottom of the first spring is fixedly connected to the top of the fixing plate. A liquid outlet pipe is fixedly connected through the bottom of the linkage bin. An internal groove is opened inside the housing. A linkage member is installed inside the internal groove. A connecting rod is rotatably connected through the glue storage bin. An impeller is fixedly connected to the connecting rod. A through groove is opened on the adjusting plate. A heating member is installed inside the through groove.

[0008] By adopting the above technical solution, pull the adjusting plate down to above the workpiece to determine the dispensing position, and then start the operation of the adjusting member to drive the housing to descend for the second time, so that the liquid outlet pipe can accurately and correctly drip on the dispensing position. Through the two-time descending positioning, the device can achieve a more accurate and stable dispensing effect. While the housing is gradually descending, the heating member will be started. Because the position of the glue delivery pipe is close to the bottom of the housing, the inside of the glue delivery pipe will be heated by the operation of the heating member, so that the glue inside the glue delivery pipe can always be at room temperature, improving the fluidity of the glue. Start the operation of the driving member to push the glue inside the glue delivery pipe transmitted to the linkage bin through the bottom end of the push rod for extrusion. The glue is continuously extruded by the up and down movement of the push rod to realize the dispensing operation on the workpiece. While the push rod moves back and forth cyclically, the fixing piece will drive the linkage member to operate, so that the glue inside the glue storage bin can be transmitted to the linkage bin in a fixed amount, so as to ensure that the amount of glue extruded each time is evenly fixed, realize effective control, and reduce the adverse effects on the bonding effect and appearance quality of the product caused by too much or too little glue amount, resulting in product defects, and greatly improve the product quality and production efficiency.

[0009] Furthermore, the adjusting member includes a groove formed on one side of the fixed seat. A lead screw is rotatably connected inside the groove. A second motor is fixedly connected to the top of the fixed seat. The output end of the second motor is fixedly connected to one end of the lead screw. A support block is threadedly connected to the lead screw. One side of the support block is fixedly connected to one side of the housing.

[0010] By adopting the above technical solution, starting the second motor drives the housing to displace downward, so that the liquid outlet pipe can accurately and correctly drip on the dispensing position. Through two descents and positioning, the device can achieve a more accurate and stable dispensing effect, and at the same time helps to improve work efficiency.

[0011] Furthermore, the driving member includes a second rotating shaft rotatably connected inside the cavity. A driving wheel is fixedly connected to the second rotating shaft. A first motor is fixedly connected to one side of the housing. The output end of the first motor is fixedly connected to one end of the second rotating shaft. A driven wheel is fixedly connected to the first rotating shaft. A transmission belt is rotatably connected to the outer walls of the driving wheel and the driven wheel. The diameter of the driving wheel is smaller than that of the driven wheel. The cam is located below one end of the connecting plate.

[0012] By adopting the above technical solution, the rotation of the driven wheel can drive the first rotating shaft and the cam to rotate. At the same time, because the diameter of the driving wheel is smaller than that of the driven wheel, the driving wheel will rotate multiple circles while the driven wheel only rotates one circle. Therefore, the rotation speed of the driven wheel is decelerated and controlled to avoid too fast glue dispensing.

[0013] Furthermore, a sealing gasket is fixedly connected to the bottom of the fixing plate. The push rod passes through the sealing gasket.

[0014] By adopting the above technical solution, the sealing gasket can maintain the sealing between the push rod and the fixing plate and reduce the upward penetration of the glue.

[0015] Furthermore, the linkage member includes a through groove formed through one side of the built-in groove. A support plate is fixedly connected to the outer wall of the fixed piece. The support plate is slidably connected inside the through groove. A rack is fixedly connected to one end of the support plate. One end of the connecting rod passes through and is located inside the built-in groove. A gear is fixedly connected to one end of the connecting rod. The gear is meshed with the rack. The impeller is located inside the glue storage bin.

[0016] By adopting the above technical solution, the fixed piece drives the support plate to reciprocate inside the through groove, thereby driving the rack to move together, causing the impeller to rotate intermittently inside the glue storage bin. Through each intermittent rotation of the impeller, the glue inside the glue storage bin can be transferred to the linkage bin in a fixed amount, thereby ensuring that the amount of glue extruded each time is evenly fixed.

[0017] Further, the heating element includes a side groove opened on one side of the through groove. A pressing plate is slidably arranged in the side groove. A pressure sensor is fixedly connected to the top of the pressing plate. An electric heating plate is fixedly connected to the top of the pressing plate. The pressure sensor is electrically connected to the electric heating plate.

[0018] By adopting the above technical solution, the pressure sensor will receive the pressure conducted from the bottom of the housing to start the operation and heat generation of the electric heating plate. Since the position of the glue delivery pipe is close to the bottom of the housing, the inside of the glue delivery pipe will be heated by the operation and heat generation of the electric heating plate, so that the glue inside the glue delivery pipe can always be in a normal temperature state.

[0019] Further, a fixing rod is fixedly connected to the inside of the side groove. One end of the pressing plate is slidably connected to the fixing rod. A second spring is sleeved on the fixing rod. One end of the second spring is fixedly connected to the bottom of one end of the pressing plate. The other end of the second spring is fixedly connected to the inner wall of the side groove.

[0020] By adopting the above technical solution, as the housing gradually descends, the pressing plate will slide on the fixing rod. Through the elastic rebound of the second spring, the pressing plate can always be in contact with the bottom of the housing to maintain the stability of heating.

[0021] A glue dispensing method for improving the airtightness of the plastic-encapsulated part by glue dispensing.

[0022] By adopting the above technical solution, it can ensure that the amount of glue extruded each time is uniformly fixed, realize effective control, and reduce the adverse effects on the bonding effect and appearance quality of the product caused by too much or too little glue amount, resulting in product defects, and greatly improve the product quality and production efficiency.

[0023] In summary, the present application includes at least one of the following beneficial effects:

[0024] 1. In the present application, a driving member and a linkage member are provided. By starting the operation of the driving member to drive the push rod to reciprocate, the bottom end of the push rod can push the glue transmitted to the inside of the linkage chamber by the glue delivery pipe to be extruded, realizing the glue dispensing operation on the workpiece. While the push rod reciprocates, the fixing piece will drive the linkage member to operate, so that the impeller rotates intermittently inside the glue storage chamber, and the glue inside the glue storage chamber is transmitted to the inside of the linkage chamber in a fixed amount, so as to ensure that the amount of glue extruded each time is uniformly fixed, realize effective control, and reduce the adverse effects on the bonding effect and appearance quality of the product caused by too much or too little glue amount, resulting in product defects, and greatly improve the product quality and production efficiency.

[0025] 2. The present application is provided with a movable plate, an adjusting plate and an adjusting member. First, the movable plate is started to slide to drive the adjusting plate to move to the top of the workpiece, and then the adjusting plate is pulled down to above the workpiece to determine the dispensing position, and then the adjusting member is started to drive the shell to descend a second time, so that the liquid outlet pipe can accurately and accurately drip on the dispensing position. Through two descent positioning, the device can achieve a more accurate and stable dispensing effect, and also help to improve work efficiency, simplify assembly, reduce error rate, improve product reliability, and improve the air tightness of the product by glue filling to meet the product's performance in a liquid environment.

[0026] 3. The present application is provided with a heating element. When the shell gradually descends, the bottom of the shell will fit with the heating element inside the through groove. At this time, the heating element will be started. Since the position of the rubber pipe is close to the bottom of the shell, the inside of the rubber pipe will be heated by the operation of the heating element, so that the glue inside the rubber pipe can always be kept at room temperature, thereby improving the fluidity of the glue, making it more convenient to perform glue dispensing operations, and improving the quality and effect of glue dispensing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the device body in this application.

[0028] Figure 2 It is a schematic diagram of the three-dimensional structure of the workpiece in this application.

[0029] Figure 3 It is a cross-sectional view of the shell in this application.

[0030] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0031] Figure 5 It is a schematic diagram of the three-dimensional structure of the heating element in this application.

[0032] Description of reference numerals:

[0033] 1. Base; 2. Moving plate; 3. Adjusting plate; 4. Workpiece; 5. Fixed seat; 6. Adjusting member; 7. Housing; 8. Glue storage bin; 81. Glue delivery pipe; 9. Cavity; 10. Linkage bin; 11. Fixed plate; 12. First rotating shaft; 13. Cam; 14. Rotating rod; 15. Connecting plate; 16. Second rotating shaft; 17. Driving wheel; 18. First motor; 19. Driven wheel; 20. Transmission belt; 21. Push rod; 22. Fixed piece; 23. First spring; 24. Sealing gasket; 25. Liquid outlet pipe; 26. Built-in groove; 27. Through groove; 28. Support plate; 29. Rack; 30. Connecting rod; 31. Gear; 32. Impeller; 33. Through slot; 34. Side slot; 35. Fixed rod; 36. Pressing plate; 37. Second spring; 38. Pressure sensor; 39. Electric heating plate; 61. Groove; 62. Lead screw; 63. Second motor; 64. Support block. Detailed implementation manners

[0034] The following further describes the present application in detail with reference to the Figures 1-5 accompanying drawings.

[0035] The embodiment of the present application discloses a dispensing device and a dispensing method for improving the airtightness of a plastic-encapsulated part by dispensing.

[0036] Referring to Figure 1 , Figure 2 and Figure 3, A dispensing device and a dispensing method for improving the airtightness of plastic-encased parts through dispensing, including a base 1. A moving plate 2 is provided on one side of the base 1. An adjusting plate 3 is slidably provided on one side of the moving plate 2. A workpiece 4 is provided on the base 1. A fixed seat 5 is fixedly connected to the top of the adjusting plate 3. An adjusting member 6 is installed inside the fixed seat 5. A housing 7 is installed on one side of the fixed seat 5. A glue storage bin 8 is fixedly connected inside the housing 7. A cavity 9 is opened inside the housing 7. A linkage bin 10 is opened inside the housing 7. A glue delivery pipe 81 is fixedly connected through the bottom of the glue storage bin 8. The other end of the glue delivery pipe 81 is fixedly connected through the linkage bin 10. The cavity 9 is in through connection with the linkage bin 10. A fixing plate 11 is fixedly connected inside the linkage bin 10. A first rotating shaft 12 is rotatably connected inside the cavity 9. A cam 13 is fixedly connected to the first rotating shaft 12. A rotating rod 14 is fixedly connected inside the cavity 9. A connecting plate 15 is rotatably connected to the rotating rod 14. Both ends of the connecting plate 15 are located inside the cavity 9 and the linkage bin 10 respectively. A driving member is installed inside the cavity 9. A push rod 21 is slidably connected through the fixing plate 11. A fixing piece 22 is fixedly connected to the push rod 21. A first spring 23 is sleeved on the push rod 21. The top of the first spring 23 is fixedly connected to the bottom of the fixing piece 22. The bottom of the first spring 23 is fixedly connected to the top of the fixing plate 11. A liquid outlet pipe 25 is fixedly connected through the bottom of the linkage bin 10. An internal groove 26 is opened inside the housing 7. A linkage member is installed inside the internal groove 26. A connecting rod 30 is rotatably connected through the glue storage bin 8. An impeller 32 is fixedly connected to the connecting rod 30. A through groove 33 is opened on the adjusting plate 3. A heating member is installed inside the through groove 33. A sealing pad 24 is fixedly connected to the bottom of the fixing plate 11. The push rod 21 passes through the sealing pad 24.

[0037] During use, first, design the sheet metal material as a copper stamping die, cut the material using a hardware die, and then complete the required processes according to the drawings. Subsequently, place the sheet metal part into the injection mold and form it using an injection molding machine. Through high temperature and high pressure, fuse it with the plastic material to form a whole. Then, place the formed workpiece 4 on the top of the base 1. Subsequently, pour epoxy resin AB glue into the interior of the glue storage bin 8. The epoxy resin AB glue can achieve the properties of water resistance, oil resistance, corrosion prevention, environmental protection, and super strong adhesion. At this time, start the sliding of the moving plate 2 to drive the adjustment plate 3 to move to the top of the workpiece 4. Subsequently, pull the adjustment plate 3 down above the workpiece 4 to determine the dispensing position. Then, start the operation of the adjustment member 6 to drive the housing 7 to descend for a second time, so that the liquid outlet pipe 25 can accurately and correctly drip at the dispensing position. Through the two descents for positioning, the device can achieve a more accurate and stable dispensing effect, and at the same time, it also helps to improve work efficiency. While the housing 7 is gradually descending, the bottom of the housing 7 will be in contact with the heating element inside the through groove 33. At this time, the heating element will be started. Because the position of the glue delivery pipe 81 is close to the bottom of the housing 7, the heating element will be used to heat the interior of the glue delivery pipe 81 during operation, so that the glue inside the glue delivery pipe 81 can always be in a normal temperature state, improving the fluidity of the glue, making it more convenient for the glue to perform the dispensing operation, and improving the quality and effect of the dispensing. When the liquid outlet pipe 25 reaches the dispensing position, start the operation of the driving member to drive the cam 13 to rotate. Through the rotation of the cam 13, the end of the connecting plate 15 will be intermittently collided. As a result, when the connecting plate 15 is collided, it will rotate around the rotating rod 14 as the center. When the other end of the connecting plate 15 descends, it will drive the push rod 21 to move downward on the fixed plate 11 and compress the first spring 23 to contract. At this time, the glue transported by the glue delivery pipe 81 to the inside of the linkage bin 10 can be extruded through the bottom end of the push rod 21;

[0038] Subsequently, when the cam 13 continues to rotate away from the connecting plate 15, according to the rebound of the first spring 23, it will push the fixing piece 22 to drive the push rod 21 to rise, causing the connecting plate 15 to return to its original position. By the up and down movement of the push rod 21, the glue is continuously extruded, realizing the dispensing operation on the workpiece 4. While the push rod 21 moves reciprocally, the fixing piece 22 will drive the linkage to operate. Through the operation of the linkage, the connecting rod 30 can perform intermittent rotation, so that the impeller 32 rotates intermittently inside the glue storage bin 8. Through each intermittent rotation of the impeller 32, the glue inside the glue storage bin 8 can be transferred to the linkage bin 10 in a fixed amount, so as to ensure that the amount of glue extruded each time is evenly fixed, realizing effective control, reducing the adverse effects on the bonding effect and appearance quality of the product caused by too much or too little glue amount, resulting in product defects, greatly improving the product quality and production efficiency, reducing the product cost at the same time, reducing the labor intensity, improving the work efficiency, simplifying the assembly, reducing the error rate, and improving the product reliability. Finally, when the mixed glue is coated on the specified area, it can be left standing for 24 hours for solidification and drying. By potting, the airtightness of the product is improved to meet the use performance of the product in the liquid environment.

[0039] Referring to Figure 1 and Figure 5 , the adjusting member 6 includes a groove 61 opened on one side of the fixed seat 5. A lead screw 62 is rotatably connected inside the groove 61. A second motor 63 is fixedly connected to the top of the fixed seat 5. The output end of the second motor 63 is fixedly connected to one end of the lead screw 62. A support block 64 is threadedly connected to the lead screw 62. One side of the support block 64 is fixedly connected to one side of the housing 7.

[0040] During use, first start the second motor 63 to rotate to drive the lead screw 62 to rotate, so that the support block 64 moves along the direction of the groove 61, thereby driving the housing 7 to move downward, so that the liquid outlet pipe 25 can accurately and correctly drip at the dispensing position. Through two descents for positioning, the device can achieve a more accurate and stable dispensing effect, and at the same time helps to improve the work efficiency.

[0041] Referring to Figure 1 and Figure 2 , the driving member includes a second rotating shaft 16 rotatably connected inside the cavity 9. A driving wheel 17 is fixedly connected to the second rotating shaft 16. A first motor 18 is fixedly connected to one side of the housing 7. The output end of the first motor 18 is fixedly connected to one end of the second rotating shaft 16. A driven wheel 19 is fixedly connected to the first rotating shaft 12. A transmission belt 20 is rotatably connected to the outer walls of the driving wheel 17 and the driven wheel 19. The diameter of the driving wheel 17 is smaller than the diameter of the driven wheel 19. The cam 13 is located below one end of the connecting plate 15.

[0042] During use, first start the operation of Motor 18 to drive the rotation of Shaft 2, thereby causing the driving wheel 17 to rotate simultaneously. Since the transmission belt 20 is connected between the driving wheel 17 and the driven wheel 19, when the driving wheel 17 rotates, it will drive the driven wheel 19 to rotate simultaneously under the guidance of the transmission belt 20. In this way, the rotation of the driven wheel 19 can drive the rotation of Shaft 1 and the cam 13. At the same time, because the diameter of the driving wheel 17 is smaller than that of the driven wheel 19, the driving wheel 17 will rotate multiple circles while the driven wheel 19 only rotates one circle. Therefore, the rotational speed of the driven wheel 19 is decelerated and controlled to avoid excessive glue extrusion.

[0043] Refer to Figure 3 and Figure 4 As shown in Figure 3 and Figure 4 , the linkage member includes a through groove 27 formed through one side of the built-in groove 26. A support plate 28 is fixedly connected to the outer wall of the fixing piece 22. The support plate 28 is slidably connected in the through groove 27. One end of the support plate 28 is fixedly connected to a rack 29. One end of the connecting rod 30 passes through and is located in the built-in groove 26. One end of the connecting rod 30 is fixedly connected to a gear 31. The gear 31 is meshed with the rack 29. The impeller 32 is located inside the glue storage bin 8.

[0044] During use, while the push rod 21 reciprocates, the fixing piece 22 will drive the support plate 28 to reciprocate inside the through groove 27, thereby driving the rack 29 to move together. Since the rack 29 and the gear 31 are meshed with each other, the regular rotation of the gear 31 will be driven according to the cyclic movement of the rack 29. Therefore, the impeller 32 will rotate intermittently inside the glue storage bin 8. Through each intermittent rotation of the impeller 32, the glue inside the glue storage bin 8 can be transmitted to the linkage bin 10 in a fixed amount, thereby ensuring that the amount of glue extruded each time is evenly fixed, achieving effective control, and reducing the adverse effects on the bonding effect and appearance quality of the product caused by too much or too little glue volume, resulting in product defects, and greatly improving the product quality and production efficiency.

[0045] Refer to Figure 1 and Figure 5 As shown in Figure 1 and Figure 5 , the heating member includes a side groove 34 formed on one side of the through groove 33. A pressing plate 36 is slidably arranged in the side groove 34. A pressure sensor 38 is fixedly connected to the top of the pressing plate 36. An electric heating plate 39 is fixedly connected to the top of the pressing plate 36. The pressure sensor 38 is electrically connected to the electric heating plate 39. A fixing rod 35 is fixedly connected inside the side groove 34. One end of the pressing plate 36 is slidably connected to the fixing rod 35. A second spring 37 is sleeved on the fixing rod 35. One end of the second spring 37 is fixedly connected to the bottom of one end of the pressing plate 36, and the other end of the second spring 37 is fixedly connected to the inner wall of the side groove 34.

[0046] While the housing 7 gradually descends, the bottom of the housing 7 will be in contact with the pressure plate 36 inside the through groove 33. At this time, the pressure sensor 38 will receive the pressure conducted from the bottom of the housing 7 to start the operation and heating of the electric heating plate 39. Since the position of the glue delivery pipe 81 is close to the bottom of the housing 7, the inside of the glue delivery pipe 81 will be heated by the operation and heating of the electric heating plate 39, so that the glue inside the glue delivery pipe 81 can always be at room temperature, improving the fluidity of the glue, making it more convenient for the glue to be dispensed, enhancing the quality and effect of dispensing. At the same time, as the housing 7 gradually descends, the pressure plate 36 will slide on the fixed rod 35. Through the elastic rebound of the second spring 37, the pressure plate 36 can always be in contact with the bottom of the housing 7 to maintain the stability of heating.

[0047] The implementation principle of the dispensing device and the dispensing method for improving the airtightness of the plastic-encapsulated parts by dispensing in this embodiment is as follows: When in use, first place the workpiece 4 on the top of the base 1, and then pour the epoxy resin AB glue into the inside of the glue storage bin 8. The epoxy resin AB glue can achieve the performance of water resistance, oil resistance, corrosion prevention, environmental protection and super adhesion. At this time, the movable plate 2 can be started to slide to drive the adjusting plate 3 to move to the top of the workpiece 4, and then the adjusting plate 3 is pulled down above the workpiece 4 to determine the dispensing position. Then the motor two 63 is started to rotate to drive the lead screw 62 to rotate, so that the support block 64 moves along the direction of the groove 61, thereby driving the housing 7 to move downward, so that the liquid outlet pipe 25 can accurately and correctly drip on the dispensing position. Through the two-time descending positioning, the device can achieve a more accurate and stable dispensing effect, and at the same time, it also helps to improve the work efficiency.

[0048] While the housing 7 is gradually descending, the bottom of the housing 7 will be in contact with the pressure plate 36 inside the through groove 33. At this time, the pressure sensor 38 will receive the pressure conducted from the bottom of the housing 7 to start the operation and heating of the electric heating plate 39. Since the position of the glue delivery pipe 81 is close to the bottom of the housing 7, the inside of the glue delivery pipe 81 will be heated by the operation and heating of the electric heating plate 39, so that the glue inside the glue delivery pipe 81 can always be at room temperature, improving the fluidity of the glue, making it more convenient for the glue to be dispensed, enhancing the quality and effect of dispensing. At the same time, as the housing 7 gradually descends, the pressure plate 36 will slide on the fixed rod 35. Through the elastic rebound of the second spring 37, the pressure plate 36 can always be in contact with the bottom of the housing 7 to maintain the stability of heating. When the liquid outlet pipe 25 reaches the dispensing position, the first motor 18 can be started to operate to drive the second rotating shaft 16 to rotate, so that the driving wheel 17 rotates together. Since the driving wheel 17 and the driven wheel 19 are connected with a transmission belt 20, when the driving wheel 17 rotates, the driven wheel 19 will be driven to rotate together through the guidance of the transmission belt 20. Thus, the first rotating shaft 12 and the cam 13 can be driven to rotate through the rotation of the driven wheel 19. At the same time, since the diameter of the driving wheel 17 is smaller than that of the driven wheel 19, the driving wheel 17 will rotate multiple times while the driven wheel 19 only rotates once, so as to control the speed reduction of the driven wheel 19 to avoid too fast glue dispensing. Through the rotation of the cam 13, one end of the connecting plate 15 will be intermittently collided, so that the connecting plate 15 rotates around the rotating rod 14 after being collided. When the other end of the connecting plate 15 descends, the push rod 21 will be driven to move downward on the fixed plate 11 and compress the first spring 23 to contract. At this time, the glue transmitted from the glue delivery pipe 81 to the linkage bin 10 can be extruded through the bottom end of the push rod 21;

[0049] Subsequently, when the cam 13 continues to rotate away from the connecting plate 15, according to the rebound of the first spring 23, the fixed piece 22 will be pushed to drive the push rod 21 to rise, so that the connecting plate 15 returns to its original position. The glue is continuously extruded by the up and down movement of the push rod 21 to realize the dispensing operation on the workpiece 4. While the push rod 21 moves back and forth, the fixed piece 22 will drive the support plate 28 to move back and forth inside the through groove 27, so as to drive the rack 29 to move together. Since the rack 29 and the gear 31 are meshed with each other, the gear 31 will be driven to rotate regularly according to the cyclic movement of the rack 29. Therefore, the impeller 32 will rotate intermittently inside the glue storage bin 8. Through each intermittent rotation of the impeller 32, the glue inside the glue storage bin 8 can be transmitted to the linkage bin 10 in a fixed amount, so as to ensure that the amount of glue extruded each time is evenly fixed, realize effective control, and reduce the adverse effects on the bonding effect and appearance quality of the product caused by too much or too little glue volume, resulting in product defects, and greatly improve the product quality and production efficiency.

Claims

1. A dispensing device, comprising a base (1), characterized in that: A movable plate (2) is arranged on one side of the base (1), an adjustment plate (3) is slidably arranged on one side of the movable plate (2), a workpiece (4) is arranged on the base (1), a fixed seat (5) is fixedly connected to the top of the adjustment plate (3), an adjustment member (6) is installed inside the fixed seat (5), a shell (7) is installed on one side of the fixed seat (5), a glue storage bin (8) is fixedly connected to the inside of the shell (7), a cavity (9) is provided inside the shell (7), a linkage bin (10) is provided inside the shell (7), a glue delivery pipe (81) is passed through and fixedly connected to the bottom of the glue storage bin (8), and the other end of the glue delivery pipe (81) is provided at the bottom of the glue storage bin (8). The end of the linkage chamber (10) is connected to the linkage chamber (10) through the cavity (9); the linkage chamber (10) is connected to a fixed plate (11) in a fixed manner; the cavity (9) is connected to a rotating shaft (12) in a rotatable manner; the rotating shaft (12) is connected to a cam (13); the cavity (9) is connected to a rotating rod (14); the rotating rod (14) is connected to a connecting plate (15) in a rotatable manner; the connecting plate (15) is located in the cavity (9) and the linkage chamber (10) at both ends; a driving member is installed in the cavity (9); a push rod (21) is connected to the fixed plate (11) in a slidable manner; the push rod (21) is connected to the fixed plate (11); ... ), a fixing plate (22) is fixedly connected to the push rod (21), a spring (23) is sleeved on the push rod (21), the top of the spring (23) is fixedly connected to the bottom of the fixing plate (22), the bottom of the spring (23) is fixedly connected to the top of the fixing plate (11), a liquid outlet pipe (25) is fixedly connected to the bottom of the linkage bin (10), a built-in groove (26) is provided inside the shell (7), a linkage member is installed in the built-in groove (26), a connecting rod (30) is rotatably connected to the inside of the glue storage bin (8), an impeller (32) is fixedly connected to the connecting rod (30), a through groove (33) is provided on the adjusting plate (3), and the A heating element is installed inside the through groove (33); the driving element comprises a second rotating shaft (16) rotatably connected to the inside of the cavity (9); a driving wheel (17) is fixedly connected to the second rotating shaft (16); a motor (18) is fixedly connected to one side of the housing (7); an output end of the motor (18) is fixedly connected to one end of the second rotating shaft (16); a driven wheel (19) is fixedly connected to the first rotating shaft (12); a transmission belt (20) is rotatably connected to the outer walls of the driving wheel (17) and the driven wheel (19); the diameter of the driving wheel (17) is smaller than the diameter of the driven wheel (19); and the cam (13) is located below one end of the connecting plate (15);The linkage member comprises a through groove (27) extending through one side of the built-in groove (26); a support plate (28) is fixedly connected to the outer wall of the fixing plate (22); the support plate (28) is slidably connected in the through groove (27); one end of the support plate (28) is fixedly connected to a rack (29); one end of the connecting rod (30) extends through the built-in groove (26); one end of the connecting rod (30) is fixedly connected to a gear (31); the gear (31) is meshingly connected to the rack (29); the impeller (32) is located inside the glue storage bin (8); the heating member comprises a side groove (34) extending through one side of the through groove (33); a pressure plate (36) is slidably arranged in the side groove (34); a pressure sensor (38) is fixedly connected to the top of the pressure plate (36); an electric heating plate (39) is fixedly connected to the top of the pressure plate (36); the pressure sensor (38) is fixedly connected to the top of the pressure plate (36); The inductor (38) is electrically connected to the electric heating plate (39); a fixing rod (35) is fixedly connected inside the side groove (34); one end of the pressure plate (36) is slidably connected to the fixing rod (35); a spring (37) is sleeved on the fixing rod (35); one end of the spring (37) is fixedly connected to the bottom of one end of the pressure plate (36); the other end of the spring (37) is fixedly connected to the inner wall of the side groove (34); the adjusting member (6) comprises a groove (61) opened on one side of the fixing seat (5); a screw rod (62) is rotatably connected inside the groove (61); a motor (63) is fixedly connected to the top of the fixing seat (5); an output end of the motor (63) is fixedly connected to one end of the screw rod (62); a support block (64) is threadedly connected to the screw rod (62); one side of the support block (64) is fixedly connected to one side of the housing (7); 2. A dispensing device according to claim 1, characterized in that: A sealing gasket (24) is fixedly connected to the bottom of the fixed plate (11), and the push rod (21) passes through the sealing gasket (24).

3. A method for improving the air tightness of a plastic package by dispensing, characterized in that: The method is applicable to a dispensing device as described in any one of claims 1-2, and the steps of the method are as follows: S1: First, place the workpiece (4) on the top of the base (1), then start the moving plate (2) to slide and drive the adjustment plate (3) to move to the top of the workpiece (4), then pull the adjustment plate (3) down to the top of the workpiece (4) to determine the dispensing position, and then start the adjustment member (6) to drive the shell (7) to move downward, so that the liquid outlet pipe (25) can accurately and correctly drip on the dispensing position. Through two drops and positioning, the device can achieve a more accurate and more stable dispensing effect, and also help to improve work efficiency; S2: As the shell (7) gradually descends, the bottom of the shell (7) is fitted with the pressure plate (36) inside the through groove (33). Since the position of the glue delivery pipe (81) is close to the bottom of the shell (7), the inside of the glue delivery pipe (81) is heated by the operation of the electric heating plate (39), so that the glue inside the glue delivery pipe (81) can always be kept at room temperature, thereby improving the fluidity of the glue, making it more convenient to perform glue dispensing operations, and improving the quality and effect of glue dispensing; S3: When the liquid outlet pipe (25) reaches the dispensing position, the motor 1 (18) can be started to drive the rotating shaft 1 (12) and the cam (13) to rotate. The rotation of the cam (13) will intermittently collide with one end of the connecting plate (15), so that the one end of the connecting plate (15) drives the push rod (21) to move downward on the fixed plate (11) and squeeze the spring 1 (23) to shrink. At this time, the bottom end of the push rod (21) can push the glue delivered by the glue delivery pipe (81) to the inside of the linkage bin (10) for extrusion. The glue is continuously extruded by the up and down movement of the push rod (21), thereby realizing the dispensing operation on the workpiece (4); S4: As the push rod (21) moves back and forth, the fixing plate (22) drives the rack (29) to move in a circular manner, thereby driving the gear (31) to rotate regularly, so that the impeller (32) rotates intermittently inside the glue storage bin (8). The impeller (32) can transfer the glue inside the glue storage bin (8) to the linkage bin (10) in a fixed amount, thereby ensuring that the amount of glue extruded each time is uniform and fixed, achieving effective control, reducing the adverse effects of excessive or insufficient glue on the bonding effect and appearance quality of the product, resulting in product defects, and greatly improving product quality and production efficiency; S5: Finally, apply the mixed glue to the designated area and let it stand for 24 hours to solidify and dry. The air tightness of the product is improved by glue filling to meet the performance of the product in a liquid environment.

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