Glue vacuum feed apparatus

Abstract

The application relates to the technical field of glue pouring, in particular to a glue vacuum feeding equipment, which comprises a glue barrel, a vacuum machine and a metering pump communicated with the glue barrel, a three-way valve electrically connected to a control system is further arranged outside the glue barrel, a liquid inlet end of the three-way valve is communicated with a liquid outlet end of the metering pump, a glue outlet pipe is communicated with one liquid outlet end of the three-way valve, and a reflux pipe is communicated between the other liquid outlet end of the three-way valve and the glue barrel; a hollow temperature increasing bin is arranged on the outer side wall of the glue barrel, the reflux pipe is spirally coiled in the temperature increasing bin, and a plurality of electric heating pipes electrically connected to the control system are arranged in the temperature increasing bin. The application has the advantages of reducing the possibility of glue condensation and pipeline blockage.

Description

Technical Field

[0001] The present application relates to the technical field of glue pouring, and in particular to a glue vacuum feeding device. Background Art

[0002] Vacuum potting is a process technology primarily used for sealing, bonding, and fixing in the electronics, electrical, and automotive industries. This process is performed in a vacuum environment, effectively removing air bubbles from the glue, improving potting quality and product performance.

[0003] The related art discloses a vacuum glue filling machine, which includes a glue barrel, a vacuum machine for evacuating the glue barrel, a stirring blade arranged in the glue barrel and used to stir the glue, a glue outlet pipe connected to the glue barrel, and a piston metering pump connected between the glue outlet pipe and the glue barrel.

[0004] When the glue in the glue barrel is not used for a long time, the glue may coagulate, causing the various pipes connected to the glue barrel to become blocked, which is an obvious disadvantage. Summary of the Invention

[0005] In order to improve the problem that glue coagulation may cause pipeline blockage, the present application provides a glue vacuum feeding device.

[0006] The present application provides a glue vacuum feeding device that adopts the following technical solution:

[0007] A glue vacuum feeding device includes a glue barrel, a vacuum machine connected to the glue barrel, and a metering pump. A three-way valve electrically connected to a control system is arranged outside the glue barrel. The liquid inlet end of the three-way valve is connected to the liquid outlet end of the metering pump. One liquid outlet end of the three-way valve is connected to a glue outlet pipe, and a return pipe is connected between the other liquid outlet end and the glue barrel.

[0008] By adopting the above technical solution, when glue is being fed, the glue flows from the three-way valve into the outlet hose. When feeding stops, the glue flows back into the glue barrel from the return pipe under the continuous output of the metering pump, thus achieving internal circulation of the glue in the glue barrel and reducing the possibility of glue solidifying due to long-term static state in the same place.

[0009] Optionally, a hollow heating chamber is arranged on the outer wall of the glue barrel, the return pipe is spirally coiled in the heating chamber, and a plurality of electric heating tubes electrically connected to a control system are arranged in the heating chamber.

[0010] By adopting the above technical solution, the electric heating tube works to heat the heating chamber, and the glue circulating in the inner circulation absorbs heat from the heating chamber and flows back to the glue barrel when passing through the heating chamber, thereby increasing the overall temperature of the glue in the glue barrel and further reducing the possibility of glue condensation.

[0011] Optionally, a mounting pillar is arranged on the inner bottom wall of the glue barrel, and an elastic airbag with a hollow interior and immersed in glue is provided on the mounting pillar. An air pressure sensor electrically connected to the control system is arranged outside the glue barrel, and the sensing end of the air pressure sensor passes through the glue barrel and the mounting pillar to the elastic airbag.

[0012] By adopting the above technical solution, when the amount of glue in the glue barrel is different, the air pressure sensor detects that the air pressure in the elastic airbag is different. Therefore, the amount of glue in the glue barrel is detected by the air pressure sensor, and the heating time of the electric heating tube is adjusted each time, saving a lot of electricity.

[0013] Optionally, a vertical return rubber pipe is connected between the return pipe and the three-way valve, and the return rubber pipe is located in the warming chamber, and an elastic metal strip is arranged on the outer wall of the return pipe along its length direction, and the spiral radius of the return pipe and the elastic metal strip gradually increases in the direction away from the axis of the rubber barrel, and a lifting groove is vertically opened on the side wall of the rubber barrel and an installation frame is arranged in the lifting groove, and a mounting plate seat is vertically slidably fitted in the installation frame, and the connection between the return pipe and the rubber barrel is arranged on the mounting plate seat, and a telescopic sealing plate group is arranged on the top and bottom of the mounting plate seat, and the telescopic sealing plate group includes a plurality of sealing plates arranged along the direction away from the axis of the rubber barrel, and two adjacent sealing plates in the same group are tightly and slidingly fitted, the sealing plate closest to the axis of the rubber barrel is arranged on the mounting plate seat, and the sealing plate farthest from the axis of the rubber barrel is arranged at the end of the mounting frame, and the sealing plate is tightly and slidingly fitted with the mounting frame.

[0014] By adopting the above technical solution, during the internal circulation of the glue, the connection point between the return pipe and the mounting plate seat is higher than the connection point between the return glue pipe and the return pipe. In this way, the glue spirals upward into the glue barrel, allowing the glue to fully absorb the heat in the warming chamber before flowing back into the glue barrel. When it is time to empty the glue in the return pipe, the mounting plate seat moves downward, and the corresponding sealing plates remain stationary or move vertically until the connection point between the return pipe and the mounting plate seat is lower than the connection point between the return glue pipe and the return pipe. At this time, the return pipe spirals downward under the action of the elastic metal strip, so that the glue in the return pipe is completely returned to the glue barrel under the action of gravity. This part of the glue can also be accurately fed by the metering pump.

[0015] Optionally, a fastening screw is arranged on the side of the mounting plate seat facing away from the axis of the glue barrel, and a sliding sleeve is provided on the fastening screw. The back plate is pressed against the side of the mounting frame facing away from the axis of the glue barrel, and a fastening nut is threadedly connected on the fastening screw for pressing against the side of the back plate facing away from the axis of the glue barrel.

[0016] By adopting the above technical solution, when the vertical position of the mounting plate seat is adjusted into place, the worker tightens the fastening nut to make it press against the push plate, and the push plate presses against the mounting frame, thereby realizing the vertical positioning of the mounting plate seat in the mounting frame.

[0017] Optionally, a glue discharge assembly is arranged at the top and bottom of the glue return tube, and the glue discharge assembly includes a winding rod that is rotatably inserted into the glue return tube, the end of the winding rod passes through the glue return tube and is connected to a handle, a pull wire is wound on the winding rod, and a glue pusher bead is slidably fitted in the glue return tube and is tightly attached to the inner wall of the glue return tube, and two pull wires are tied to the glue pusher bead.

[0018] By adopting the above technical solution, the worker turns the handle at a high position to reel in the pulling wire with the corresponding winding rod, and the push glue bead is pulled upward. During this process, the glue in the return glue tube will be pushed into the return pipe by the push glue bead, thereby reducing the residual amount of glue in the return glue tube.

[0019] Optionally, the connection point between the return pipe and the return glue pipe is close to the midpoint of the glue barrel height.

[0020] By adopting the above technical solution, it is ensured that when the glue in the return pipe and the return glue pipe is emptied, the return pipe as a whole is in a spiral downward shape, thereby improving the return effect of the glue in the return pipe and the return glue pipe.

[0021] Optionally, the outer wall of the heating chamber is wrapped with an insulation layer.

[0022] By adopting the above technical solution, the insulation layer can keep the temperature increasing bin warm, so that the heat in the temperature increasing bin is only dissipated into the glue barrel.

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

[0024] 1. When glue is being fed, it flows from the three-way valve into the rubber hose. When feeding stops, the glue flows back into the glue barrel from the return pipe under the continuous output of the metering pump, thus achieving internal circulation of the glue in the glue barrel and reducing the possibility of glue solidifying due to long-term static state in the same place.

[0025] 2. The electric heating tube heats up the heating chamber, and the glue circulating in the chamber absorbs heat from the chamber and flows back to the glue barrel, thereby raising the overall temperature of the glue in the barrel and further reducing the possibility of glue coagulation.

[0026] 3. When the amount of glue in the glue barrel is different, the air pressure sensor detects that the air pressure in the elastic airbag is different. Therefore, the air pressure sensor detects the amount of glue in the glue barrel and then adjusts the heating time of the electric heating tube each time, saving a lot of electricity;

[0027] 4. During the glue's internal circulation, the connection between the return pipe and the mounting plate seat is higher than the connection between the return glue pipe and the return pipe. In this way, the glue spirals upward into the glue barrel, allowing the glue to fully absorb the heat in the heating chamber before flowing back into the glue barrel. When the glue in the return pipe needs to be drained, the mounting plate seat moves downward, and the corresponding sealing plates remain stationary or move vertically until the connection between the return pipe and the mounting plate seat is lower than the connection between the return glue pipe and the return pipe. At this time, the return pipe spirals downward under the action of the elastic metal strip, so that the glue in the return pipe is completely returned to the glue barrel under the action of gravity. This part of the glue can also be accurately fed by the metering pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a cross-sectional view of an embodiment of the present application.

[0029] Figure 2 It is a schematic diagram of the positional relationship between the return pipe, the return rubber pipe and the abutment plate in the embodiment of the present application.

[0030] Explanation of the accompanying symbols: 1. Glue barrel; 2. Metering pump; 3. Three-way valve; 4. Glue outlet pipe; 5. Return pipe; 6. Heating chamber; 7. Electric heating pipe; 8. Mounting pillar; 9. Elastic airbag; 10. Air pressure sensor; 11. Glue return pipe; 12. Elastic metal strip; 13. Mounting frame; 14. Mounting plate seat; 15. Glue sealing plate; 17. Abutment plate; 18. Fastening nut; 19. Winding rod; 20. Handle; 21. Pull wire; 22. Glue pusher. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-2 This application is described in further detail.

[0032] The embodiment of the present application discloses a glue vacuum feeding device.

[0033] Reference Figure 1 The glue vacuum feeding equipment includes a glue barrel 1, a vacuum machine (not shown in the figure) connected to the glue barrel 1, and a metering pump 2. The vacuum machine directly adopts the existing technology, and the metering pump 2 adopts the piston metering pump 2 in the existing technology.

[0034] Reference Figure 1 A three-way valve 3 electrically connected to the control system is arranged outside the glue barrel 1. The liquid inlet end of the three-way valve 3 is connected to the liquid outlet end of the metering pump 2. One liquid outlet end of the three-way valve 3 is connected to a glue outlet pipe 4, and the other liquid outlet end is connected to a vertical glue return pipe 11. A return pipe 5 is connected to the glue barrel 1 at the midpoint of the height of the glue barrel 1 on the glue return pipe 11. The return pipe 5 is a soft hose and is spiral-shaped.

[0035] Reference Figure 1A circular and hollow heating chamber 6 is welded to the outer wall of the glue barrel 1. The return glue pipe 11 is located in the heating chamber 6. The return pipe 5 is coiled in the heating chamber 6. The heating chamber 6 is threaded with multiple electric heating pipes 7 that are electrically connected to the control system.

[0036] Reference Figure 1 and Figure 2 An elastic metal strip 12 is bonded to the outer wall of the return pipe 5 along its length direction. The spiral radius of the return pipe 5 and the elastic metal strip 12 increases along the direction away from the axis of the rubber barrel 1.

[0037] Reference Figure 1 and Figure 2 A lifting groove is vertically opened on the side wall of the glue barrel 1 and a mounting frame 13 is welded in the lifting groove. A mounting plate seat 14 is vertically slidably fitted in the mounting frame 13. The connection between the return pipe 5 and the glue barrel 1 is arranged on the mounting plate seat 14.

[0038] A telescopic sealing plate group is arranged on the top and bottom of the mounting plate seat 14. The telescopic sealing plate group includes multiple sealing plates 15 arranged along the direction away from the axis of the glue barrel 1. Two adjacent sealing plates 15 in the same group are tightly fitted and slide together. The sealing plate 15 closest to the axis of the glue barrel 1 is welded to the mounting plate seat 14, and the sealing plate 15 farthest from the axis of the glue barrel 1 is welded to the end of the mounting frame 13. The sealing plates 15 are tightly fitted and slide together with the mounting frame 13.

[0039] Reference Figure 1 and Figure 2 When the glue is fed, the glue flows from the three-way valve 3 into the glue outlet pipe 4. When the feeding is stopped, under the continuous output of the metering pump 2, the glue flows back into the glue barrel 1 through the glue return pipe 11 and the return pipe 5.

[0040] Reference Figure 1 When the glue flows through the return glue pipe 11 and the return pipe 5, the control system starts the electric heating pipe 7, and the electric heating pipe 7 works to increase the temperature of the heating bin 6. The glue absorbs heat from the heating bin 6 and then flows back to the glue barrel 1, thereby increasing the overall temperature of the glue in the glue barrel 1.

[0041] On the one hand, the glue circulates, and on the other hand, the temperature of the glue is increased. The two work together to reduce the possibility of glue condensation and clogging the pipes.

[0042] Reference Figure 1 The outer wall of the heating bin 6 is wrapped with an insulation layer (not shown in the figure). The insulation layer keeps the heating bin 6 warm, so that the heat in the heating bin 6 can only be dissipated into the glue barrel 1, thereby improving the heating effect of the glue in the glue barrel 1 and reducing waste.

[0043] Reference Figure 1A vertical mounting support 8 is integrally formed at the lowest point of the inner bottom wall of the glue barrel 1. An elastic airbag 9 with a hollow interior and immersed in glue is clamped on the mounting support 8 through a clamp. The external thread of the glue barrel 1 has an air pressure sensor 10 electrically connected to the control system. The sensing end of the air pressure sensor 10 passes through the glue barrel 1 and the mounting support 8 to the elastic airbag 9.

[0044] When the amount of glue in the glue barrel 1 is different, the air pressure sensor 10 detects that the air pressure in the elastic airbag 9 is different. Therefore, the amount of glue in the glue barrel 1 is detected by the air pressure sensor 10, and then the heating time of each electric heating tube 7 is adjusted, thereby optimizing the interval time of intermittent heating of the electric heating tube 7 and saving a lot of electricity.

[0045] Reference Figure 1 and Figure 2 During the circulation of the glue, the connection between the return pipe 5 and the mounting plate seat 14 is located at a high position of the mounting frame 13. At this time, the return pipe 5 is spirally upward under the action of the elastic metal strip 12, so that when the glue flows through the return pipe 5, it can fully absorb the heat in the heating chamber 6, thereby improving the heating effect of the glue in the glue barrel 1.

[0046] Reference Figure 1 and Figure 2 The worker manually slides the mounting plate seat 14 downward, and each sealing plate 15 remains stationary or moves vertically accordingly until the connection between the return pipe 5 and the mounting plate seat 14 is lower than the connection between the return glue pipe 11 and the return pipe 5. At this time, the return pipe 5 keeps spiraling downward under the action of the elastic metal strip 12, so that the glue in the return pipe 5 all flows back into the glue barrel 1 under the action of gravity, and this part of the glue can also be accurately fed under the action of the metering pump 2.

[0047] Reference Figure 1 and Figure 2 A fastening screw (not shown in the figure) is welded on the side of the mounting plate seat 14 facing away from the axis of the glue barrel 1, and a sliding sleeve is provided with a support plate 17, which is pressed against the side of the mounting frame 13 facing away from the axis of the glue barrel 1, and a fastening nut 18 is threadedly connected on the fastening screw for pressing against the side of the support plate 17 facing away from the axis of the glue barrel 1.

[0048] Reference Figure 1 and Figure 2 , glue discharge components are arranged at the top and bottom of the return glue tube 11, and the glue discharge component includes a winding rod 19 that is rotatably passed through the return glue tube 11, one end of the winding rod 19 passes through the return glue tube 11 and is threadedly connected to a handle 20, a pull wire 21 is wound on the winding rod 19, and a glue pushing bead 22 that is tightly attached to the inner wall of the return glue tube 11 is slidably fitted in the return glue tube 11, and the two pull wires 21 are tied to the glue pushing bead 22.

[0049] Reference Figure 1 and Figure 2The worker turns the handle 20, and the corresponding winding rod 19 reels the pull wire 21, and the push glue bead 22 can be pulled up or pulled back down. When the push glue bead 22 moves up, the glue in the return glue tube 11 will be pushed into the return pipe 5 by the push glue bead 22, thereby reducing the amount of glue remaining in the return glue tube 11.

[0050] The implementation principle of a glue vacuum feeding device in the embodiment of the present application is as follows:

[0051] During glue feeding, the glue flows from three-way valve 3 into rubber outlet hose 4. When feeding stops, the glue, under the continuous output of metering pump 2, flows back into glue barrel 1 through rubber return hose 11 and reflux pipe 5. As the glue flows through rubber return hose 11 and reflux pipe 5, the control system activates electric heater 7, which heats heating chamber 6. The glue then absorbs heat from heating chamber 6 and flows back into glue barrel 1.

[0052] The worker manually slides the mounting plate seat 14 downward, and each sealing plate 15 remains stationary or moves vertically accordingly until the connection between the return pipe 5 and the mounting plate seat 14 is lower than the connection between the return rubber pipe 11 and the return pipe 5. At this time, the return pipe 5 keeps spiraling downward under the action of the elastic metal strip 12.

[0053] The worker turns the handle 20 at the top, and the corresponding winding rod 19 reels the pulling wire 21, and the pushing glue bead 22 is pulled upward. During this process, the glue in the return glue tube 11 will be pushed into the return pipe 5 by the pushing glue bead 22, so that the glue in the return glue tube 11 and the return pipe 5 can flow back to the glue barrel 1 to supply the metering pump 2 for accurate feeding.

[0054] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A glue vacuum feeding device, comprising a glue barrel (1), a vacuum machine and a metering pump (2) connected to the glue barrel (1), characterized in that: A three-way valve (3) electrically connected to the control system is also arranged outside the glue barrel (1); the liquid inlet end of the three-way valve (3) is connected to the liquid outlet end of the metering pump (2); one liquid outlet end of the three-way valve (3) is connected to a glue outlet pipe (4); and the other liquid outlet end is connected to the glue barrel (1) through a return pipe (5); A hollow heating chamber (6) is arranged on the outer wall of the glue barrel (1), the return pipe (5) is spirally wound in the heating chamber (6), and a plurality of electric heating pipes (7) electrically connected to a control system are arranged in the heating chamber (6); A vertical return rubber pipe (11) is connected between the return pipe (5) and the three-way valve (3). The return rubber pipe (11) is located in the heating chamber (6). An elastic metal strip (12) is arranged on the outer wall of the return pipe (5) along its length direction. The spiral radius of the return pipe (5) and the elastic metal strip (12) gradually increases along the direction away from the axis of the rubber barrel (1). A lifting groove is vertically opened on the side wall of the rubber barrel (1) and an installation frame (13) is arranged in the lifting groove. A mounting plate seat (14) is vertically slidably matched in the installation frame (13). The return pipe (5) and The connection point of the glue barrel (1) is arranged on the mounting plate seat (14), and the top and bottom of the mounting plate seat (14) are both arranged with a telescopic sealing plate group, and the telescopic sealing plate group includes a plurality of sealing plates (15) arranged along a direction away from the axis of the glue barrel (1), and two adjacent sealing plates (15) in the same group are tightly attached and slidably matched. The sealing plate (15) closest to the axis of the glue barrel (1) is arranged on the mounting plate seat (14), and the sealing plate (15) farthest from the axis of the glue barrel (1) is arranged at the end of the mounting frame (13), and the sealing plates (15) are tightly attached and slidably matched with the mounting frame (13).

2. The glue vacuum feeding equipment according to claim 1, characterized in that: A mounting support (8) is arranged on the inner bottom wall of the glue barrel (1), and an elastic airbag (9) with a hollow interior and immersed in glue is provided on the mounting support (8). An air pressure sensor (10) electrically connected to a control system is arranged outside the glue barrel (1), and a sensing end of the air pressure sensor (10) passes through the glue barrel (1) and the mounting support (8) to the elastic airbag (9).

3. The glue vacuum feeding equipment according to claim 1, characterized in that: A fastening screw is arranged on the side of the mounting plate seat (14) facing away from the axis of the rubber barrel (1), and a sliding sleeve is provided on the fastening screw. The abutment plate (17) is pressed against the side of the mounting frame (13) facing away from the axis of the rubber barrel (1), and a fastening nut (18) is threadedly connected on the fastening screw for pressing against the abutment plate (17) on the side facing away from the axis of the rubber barrel (1).

4. The glue vacuum feeding equipment according to claim 1, characterized in that: The top and bottom of the rubber return tube (11) are both provided with a rubber discharge assembly, and the rubber discharge assembly includes a winding rod (19) that is rotatably arranged in the rubber return tube (11), the end of the winding rod (19) passes through the rubber return tube (11) and is connected to a handle (20), a pull wire (21) is wound on the winding rod (19), and a rubber pusher bead (22) that is tightly attached to the inner wall of the rubber return tube (11) is slidably fitted in the rubber return tube (11), and two pull wires (21) are tied to the rubber pusher bead (22).

5. The glue vacuum feeding equipment according to claim 1, characterized in that: The connection point between the return pipe (5) and the return rubber pipe (11) is close to the midpoint of the height of the rubber barrel (1).

6. The glue vacuum feeding equipment according to claim 1, characterized in that: The outer wall of the temperature increasing chamber (6) is wrapped with a heat-insulating layer.

Images