Efficient dispensing device for hot melt adhesive

Abstract

The utility model discloses an efficient hot melt adhesive dispensing device which comprises an adhesive supply unit, an adhesive dispensing valve provided with an adhesive inlet and an adhesive outlet, and a metering pump respectively connected with the adhesive dispensing valve, an adapter block is arranged below the metering pump, an L-shaped liquid inlet runner is communicated with an adhesive supply runner on an adhesive supply block, and an L-shaped liquid outlet runner is arranged on the adapter block. The L-shaped liquid outlet flow channel is communicated with a glue inlet in the glue dispensing valve through a connecting block provided with a communicating flow channel, at least one heating pipe is embedded in each of the switching block, the glue supply block and the connecting block, and a driven gear is arranged on the outer side of the glue dispensing head and located below the base plate in a sleeving mode. And a driving gear meshed with the driven gear is in transmission connection with an output shaft of the motor. On the basis of metering and pressurizing the glue, the hot melt glue can be selected to shorten the curing time after dispensing, and the flowability of the hot melt glue can be ensured, so that the dispensing precision and effect are ensured, the dispensing direction can be quickly switched, and the dispensing continuity and efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of glue dispensing, in particular to a high-efficiency glue dispensing device for hot melt glue. Background Art

[0002] In the field of photovoltaic curtain wall processing, the existing technology generally uses liquid glue (silicone) at room temperature. The natural curing time of the glue is long (10 to 20 hours), and the photovoltaic glass itself has a large area, so the glue curing process requires a large production space and low production efficiency. Hot melt adhesive is a plastic adhesive. Its physical state changes with the change of temperature within a certain temperature range, while its chemical properties remain unchanged. It is not only environmentally friendly, but also can solidify quickly after stopping the heat.

[0003] The existing technology usually uses liquid glue at room temperature in the processing of photovoltaic curtain walls, which has a slow curing speed and causes waste of workshop area. However, after replacing the hot melt adhesive, the hot melt adhesive cannot be heated during the entire dispensing process, and the fluidity of the hot melt adhesive cannot be guaranteed, which easily affects the accuracy and effect of dispensing. In addition, the dispensing direction cannot be switched, which easily affects the continuity and efficiency of dispensing. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an efficient hot melt adhesive dispensing device, which can use hot melt adhesive to shorten the curing time after dispensing, and ensure the fluidity of hot melt adhesive, thereby ensuring the accuracy and effect of dispensing, and can also realize rapid switching of dispensing direction, thereby improving the continuity and efficiency of dispensing.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: an efficient hot melt adhesive dispensing device, comprising: a metering pump connected to a glue supply unit and a dispensing valve with a glue inlet and a glue outlet, respectively; the liquid inlet of the metering pump is connected to the glue supply unit, the glue inlet on the dispensing valve is connected to the liquid outlet of the metering pump, and an adapter block is arranged below the metering pump, and an L-shaped liquid inlet flow channel and an L-shaped liquid outlet flow channel are respectively arranged on the adapter block, and one end of the L-shaped liquid inlet flow channel connected to the liquid inlet of the metering pump is connected to the L-shaped liquid outlet flow channel. The other end of the L-shaped liquid inlet flow channel extends to a side surface of the adapter block and is connected to a glue supply flow channel on a glue supply block, one end of the glue supply flow channel away from the L-shaped liquid inlet flow channel is connected to the glue supply unit through a glue supply hose, and the other end of the L-shaped liquid outlet flow channel, one end of which is connected to the liquid outlet of the metering pump, extends to the other side surface of the adapter block and is connected to the glue inlet on the glue dispensing valve through a connecting block with a connecting flow channel, and at least one heating pipe is embedded and installed on each of the adapter block, the glue supply block and the connecting block;

[0006] A dispensing head is connected to the glue outlet of the dispensing valve. The vertically extending dispensing head is rotatably mounted on a substrate horizontally arranged below the dispensing valve through a bearing. A motor is mounted on the upper surface of the substrate on one side of the dispensing valve. A driven gear is sleeved outside the dispensing head and below the substrate, and a driving gear meshing with the driven gear is in transmission connection with the output shaft of the motor.

[0007] The further improved solutions in the above technical solutions are as follows:

[0008] 1. In the above solution, the motor is mounted on the upper surface of the substrate through a support seat. The lower end of the output shaft of the motor is connected with a rotating shaft through a coupling. The lower end of the rotating shaft passes through the substrate and is provided with the driving gear.

[0009] 2. In the above solution, an installation block is arranged between the glue inlet block of the dispensing valve and the substrate. The upper part of the dispensing head is embedded in an installation groove on the lower surface of the installation block and is rotatably and sealingly matched with the inner wall of the installation groove through at least two rotary seals. An inlet glue hole is opened on the upper surface of the installation block. The upper end of the inlet glue hole with the lower end communicating with the installation groove is connected with the glue outlet. The blocking part of a sealing head is embedded in the inlet glue hole and is in clearance fit with the inner wall of the inlet glue hole.

[0010] 3. In the above solution, the adapter block, the glue supply block and the connecting block are all metal blocks.

[0011] 4. In the above solution, a heating tube is embedded and installed on the adapter block and the connecting block. A heating tube is respectively embedded and installed on both sides of the L-shaped inlet liquid flow channel and the L-shaped outlet liquid flow channel on the glue supply block.

[0012] 5. In the above solution, a temperature sensor is mounted on one side of the heating tube on the adapter block.

[0013] Due to the application of the above technical solutions, the present utility model has the following advantages compared with the prior art:

[0014] The high-efficiency dispensing device for hot melt adhesive of the utility model is provided with an adapter block below the metering pump. An L-shaped liquid inlet channel and an L-shaped liquid outlet channel are respectively arranged on the adapter block. The other end of the L-shaped liquid inlet channel, one end of which is communicated with the liquid inlet of the metering pump, extends to a side surface of the adapter block and is communicated with a glue supply channel on a glue supply block. The other end of the glue supply channel far from the L-shaped liquid inlet channel is connected with a glue supply unit through a glue supply pipe. The other end of the L-shaped liquid outlet channel, one end of which is communicated with the liquid outlet of the metering pump, extends to another side surface of the adapter block and is communicated with the glue inlet on the dispensing valve through a connecting block provided with a communication channel. At least one heating tube is respectively embedded and installed on the adapter block, the glue supply block and the connecting block. A dispensing head is connected to the glue outlet of the dispensing valve. The vertically extending dispensing head is rotatably installed on a substrate horizontally arranged below the dispensing valve through a bearing. A motor is installed on the upper surface of the substrate and on one side of the dispensing valve. A driven gear is sleeved outside the dispensing head and below the substrate. A driving gear meshing with the driven gear is in transmission connection with the output shaft of the motor. On the basis of realizing the metering and pressurization of the glue, hot melt glue can be selected to shorten the curing time after dispensing, thereby saving the workshop area occupied in the processing of photovoltaic glass. Moreover, the glue can be heated in real time during the whole process of supplying glue to the dispensing valve to ensure the fluidity of the hot melt glue, so as to ensure the accuracy and effect of dispensing. In addition, the dispensing direction can be quickly switched by rotating the dispensing head, improving the continuity and efficiency of dispensing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG Figure 1 is a schematic structural diagram of the high-efficiency dispensing device for hot melt adhesive of the utility model;

[0016] FIG Figure 2 is a partial structural sectional view of the high-efficiency dispensing device for hot melt adhesive of the utility model;

[0017] FIG Figure 3 is a partial structural schematic diagram of the high-efficiency dispensing device for hot melt adhesive of the utility model;

[0018] FIG Figure 4 is FIG Figure 3 in the sectional view along A-A.

[0019] In the above drawings: 1. Heating tube; 2. Bottom substrate; 3. Temperature sensor; 5. Dispensing valve; 51. Glue inlet; 52. Glue outlet; 6. Metering pump; 61. Liquid inlet; 62. Liquid outlet; 7. Adapter block; 8. L-shaped liquid inlet channel; 9. L-shaped liquid outlet channel; 10. Glue supply block; 11. Glue supply channel; 12. Glue supply pipe; 13. Connection block; 14. Connecting channel; 16. Dispensing head; 17. Bearing; 18. Substrate; 191. Driven gear; 192. Driving gear; 20. Motor; 21. Support base; 22. Coupling; 23. Rotating shaft; 241. Inductive sheet; 242. Sensor; 25. Mounting block; 251. Mounting groove; 252. Glue inlet hole; 26. Rotary seal ring; 27. Dispensing port; 28. Seal ring. Detailed implementation mode

[0020] The present patent can be further clearly understood through the following specific embodiments, but they do not limit the present patent.

[0021] Embodiment 1: An efficient dispensing device for hot melt adhesive, comprising: a metering pump 6 respectively connected to a glue supply unit and a dispensing valve 5 provided with a glue inlet 51 and a glue outlet 52, the liquid inlet 61 of the metering pump 6 is connected to the glue supply unit, the glue inlet 51 on the dispensing valve 5 is connected to the liquid outlet 62 of the metering pump 6, a transfer block 7 is arranged below the metering pump 6, an L-shaped liquid inlet channel 8 and an L-shaped liquid outlet channel 9 are respectively arranged on the transfer block 7, the other end of the L-shaped liquid inlet channel 8 communicating with the liquid inlet 61 of the metering pump 6 extends to a side surface of the transfer block 7 and communicates with a glue supply channel 11 on a glue supply block 10, the other end of the glue supply channel 11 away from the L-shaped liquid inlet channel 8 is connected to the glue supply unit through a glue supply pipe 12, the other end of the L-shaped liquid outlet channel 9 communicating with the liquid outlet 62 of the metering pump 6 extends to another side surface of the transfer block 7 and communicates with the glue inlet 51 on the dispensing valve 5 through a connection block 13 provided with a connecting channel 131, and at least one heating tube 14 is respectively embedded and installed on the transfer block 7, the glue supply block 10 and the connection block 13;

[0022] Through an external glue supply unit, such as a pressure plate pump, etc., the hot melt adhesive with fluidity after high-temperature treatment is injected from the inlet of the glue supply channel on the glue supply block, the glue enters the liquid inlet of the metering pump through the L-shaped liquid inlet channel, then passes through the L-shaped liquid outlet channel from the liquid outlet of the metering pump and finally enters the dispensing valve through the connecting channel on the connection block. During the whole process of the above glue flow, the glue is continuously heated by the heating tubes in each metal block to ensure that the hot melt adhesive always maintains a relatively high temperature (about 150 °C), so as to ensure the fluidity of the glue;

[0023] A dispensing head 16 is connected to the glue outlet 52 of the dispensing valve 5. The vertically extending dispensing head 16 is rotatably mounted on a substrate 18 horizontally arranged below the dispensing valve 5 through a bearing 17. A motor 20 is mounted on the upper surface of the substrate 18 on one side of the dispensing valve. A driven gear 191 is sleeved outside the dispensing head 16 and below the substrate 18, and a driving gear 192 meshing with the driven gear 191 is in transmission connection with the output shaft of the motor 20;

[0024] Place the photovoltaic glass to be dispensed horizontally below the dispensing head of the dispensing mechanism. Under the action of the three-axis driving mechanism, first move the dispensing head to a suitable height at a corner of the photovoltaic glass and make the rectangular dispensing port of the dispensing head parallel to one side of the photovoltaic glass. Then, the three-axis driving mechanism drives the dispensing head to move along the length direction of the other side of the photovoltaic glass and opens the glue outlet gap of the dispensing valve while moving, so as to realize the dispensing operation at the edge of one side of the photovoltaic glass.

[0025] The above-mentioned motor 20 is mounted on the upper surface of the substrate 18 through a support seat 21. The lower end of the output shaft of the motor 20 is connected with a rotating shaft 23 through a coupling 22, and the lower end of the rotating shaft 23 passes through the substrate 18 and is provided with the driving gear 192.

[0026] The above-mentioned rotating shaft 23 is rotatably connected with the substrate 18 through a bearing.

[0027] An installation block 25 is arranged between the above-mentioned dispensing valve and the substrate 18. The upper part of the dispensing head 16 is embedded in an installation groove 251 on the lower surface of the installation block 25 and is rotatably and sealingly matched with the inner wall of the installation groove 251 through at least two rotary seals 26. An inlet glue hole 252 is opened on the upper surface of the installation block 25. The upper end of the inlet glue hole 252 with the lower end communicating with the installation groove 251 is connected with the glue outlet 52. A sealing part of a sealing head is embedded in the inlet glue hole 252 and is in clearance fit with the inner wall of the inlet glue hole 252.

[0028] The above-mentioned installation block 25 and the dispensing valve are sealingly connected through a seal ring 28 arranged outside the inlet glue hole 252.

[0029] The above-mentioned adapter block 7, glue supply block 10 and connecting block 13 are all metal blocks.

[0030] A heating tube 14 is embedded and installed on the above-mentioned adapter block 7 and connecting block 13. A heating tube 14 is respectively embedded and installed on both sides of the L-shaped inlet liquid flow channel 8 and L-shaped outlet liquid flow channel 9 on the glue supply block 10.

[0031] A temperature sensor 38 is installed on one side of the heating tube 14 on the above-mentioned adapter block 7.

[0032] Embodiment 2: A high-efficiency hot melt adhesive dispensing device, comprising: a metering pump 6 connected to a glue supply unit and a dispensing valve 5 with a glue inlet 51 and a glue outlet 52, respectively; a liquid inlet 61 of the metering pump 6 is connected to the glue supply unit; the glue inlet 51 on the dispensing valve 5 is connected to the liquid outlet 62 of the metering pump 6; a transfer block 7 is provided below the metering pump 6, and an L-shaped liquid inlet channel 8 and an L-shaped liquid outlet channel 9 are respectively provided on the transfer block 7; one end of the L-shaped liquid inlet channel 8 connected to the liquid inlet 61 of the metering pump 6 extends to the other end of the L-shaped liquid inlet channel 8 On one side surface of the adapter block 7, the adapter block 7 is connected to a glue supply channel 11 on a glue supply block 10. One end of the glue supply channel 11 away from the L-shaped liquid inlet channel 8 is connected to the glue supply unit through a glue supply pipe 12. The other end of the L-shaped liquid outlet channel 9, which is connected to the liquid outlet 62 of the metering pump 6 at one end, extends to the other side surface of the adapter block 7 and is connected to the glue inlet 51 on the glue dispensing valve 5 through a connecting block 13 with a connecting channel 131. At least one heating tube 14 is embedded and installed on each of the adapter block 7, the glue supply block 10 and the connecting block 13.

[0033] A dispensing head 16 is connected to the dispensing port 52 of the dispensing valve 5. The dispensing head 16 extending vertically is rotatably mounted on a substrate 18 horizontally arranged below the dispensing valve 5 through a bearing 17. A motor 20 is mounted on the upper surface of the substrate 18 and located on one side of the dispensing valve. A driven gear 191 is sleeved on the outer side of the dispensing head 16 and located below the substrate 18. A driving gear 192 meshing with the driven gear 191 is drivingly connected to the output shaft of the motor 20.

[0034] The driven gear meshing with the driving gear is driven by the rotation of the motor to rotate, so that the dispensing head rotates 90°. During this process, the dispensing gap of the dispensing valve is closed;

[0035] Then, the three-axis driving mechanism drives the dispensing head to move along the length direction of the other side of the photovoltaic glass that is perpendicular to the side where the dispensing has been completed, and opens the dispensing gap of the dispensing valve while moving, thereby realizing the dispensing operation on the edge of the other side of the photovoltaic glass;

[0036] In this reciprocating process, continuous dispensing operation is achieved on the edges of the photovoltaic glass, improving the continuity and efficiency of dispensing.

[0037] The motor 20 is mounted on the upper surface of the base plate 18 via a support seat 21 . The lower end of the output shaft of the motor 20 is connected to a rotating shaft 23 via a coupling 22 . The lower end of the rotating shaft 23 passes through the base plate 18 and is equipped with the driving gear 192 .

[0038] A heating tube 14 is embedded and installed on the above-mentioned adapter block 7 and connecting block 13, and a heating tube 14 is respectively embedded and installed on both sides of the glue supply block 10 and located on both sides of the L-shaped liquid inlet channel 8 and L-shaped liquid outlet channel 9.

[0039] A temperature sensor 38 is installed on one side of the heating tube 14 on the above-mentioned adapter block 7.

[0040] The above-mentioned rotating shaft 23 is rotatably connected to the support seat 21 through a bearing.

[0041] An induction piece 241 that can rotate with it is installed on the above-mentioned rotating shaft 23, and a sensor 242 that cooperates with the induction piece 241 is installed on the support seat 21.

[0042] The diameter ratio of the above-mentioned driven gear 191 to the driving gear 192 is 2, and there are 2 sensor 242s which are spaced 180° circumferentially.

[0043] The dispensing orifice 27 at the end of the dispensing head 16 opposite to the dispensing valve is rectangular.

[0044] The above-mentioned adapter block 7, glue supply block 10 and connecting block 13 are all stainless steel blocks.

[0045] The above-mentioned adapter block 7 and glue supply block 10 are connected by a bottom substrate 37.

[0046] The working principle of the present utility model is as follows:

[0047] The dispensing mechanism as a whole is installed on the three-axis driving mechanism for performing dispensing operations on the edges around the rectangular photovoltaic glass.

[0048] The photovoltaic glass to be dispensed is horizontally placed below the dispensing head of the dispensing mechanism. Under the action of the three-axis driving mechanism, first, the dispensing head is moved to a suitable height at a corner of the photovoltaic glass and the rectangular dispensing orifice of the dispensing head is made parallel to one side of the photovoltaic glass. Then, the three-axis driving mechanism drives the dispensing head to move along the length direction of the other side of the photovoltaic glass and at the same time opens the glue outlet gap of the dispensing valve, thereby realizing the dispensing operation on the edge of one side of the photovoltaic glass.

[0049] Next, the driven gear meshing with the driving gear is rotated by the rotation of the motor, so that the dispensing head rotates 90°. During this process, the glue outlet gap of the dispensing valve is closed.

[0050] Then, the three-axis driving mechanism drives the dispensing head to move along the length direction of the other side of the photovoltaic glass perpendicular to the side where the dispensing has been completed and at the same time opens the glue outlet gap of the dispensing valve, thereby realizing the dispensing operation on the edge of the other side of the photovoltaic glass.

[0051] In this way, continuous dispensing operations are carried out at the edges around the photovoltaic glass, improving the continuity and efficiency of dispensing;

[0052] In the above process, through an external glue supply unit, such as a pressure plate pump, etc., the hot melt adhesive with fluidity after high-temperature treatment is injected into the inlet of the glue supply runner on the glue supply block. The glue enters the inlet of the metering pump through the L-shaped liquid inlet runner, and then passes through the L-shaped liquid outlet runner from the outlet of the metering pump and finally enters the dispensing valve through the communication runner on the connecting block. During the whole process of the glue flowing, the glue is continuously heated by the heating tubes in each metal block to ensure that the hot melt adhesive always maintains a relatively high temperature (about 150 °C), so as to ensure the fluidity of the glue. The metering pump is obtained through external purchase and is mainly used for metering and increasing, which does not belong to the inventive point of this patent and will not be elaborated here.

[0053] When using the above high-efficiency dispensing device for hot melt adhesive, on the basis of realizing metering and pressurization of the glue, it can not only select hot melt glue to shorten the curing time after dispensing, thereby saving the workshop area occupied during the processing of photovoltaic glass, but also heat the glue in real time during the whole process of supplying glue to the dispensing valve to ensure the fluidity of the hot melt glue, so as to ensure the accuracy and effect of dispensing. It can also quickly switch the dispensing direction by rotating the dispensing head, improving the continuity and efficiency of dispensing.

[0054] The above embodiments are only for explaining the technical concept and features of the present utility model, and their purpose is to enable those who are familiar with this technology to understand the content of the present utility model and implement it accordingly, and it should not be used to limit the protection scope of the present utility model. All equivalent changes or modifications made according to the spirit of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. An efficient hot melt adhesive dispensing device, comprising: A metering pump (6) is respectively connected to a glue supply unit and a glue dispensing valve (5) having a glue inlet (51) and a glue outlet (52), wherein the liquid inlet (61) of the metering pump (6) is connected to the glue supply unit, and the glue inlet (51) on the glue dispensing valve (5) is connected to the liquid outlet (62) of the metering pump (6), characterized in that: a transfer block (7) is provided below the metering pump (6), and an L-shaped liquid inlet channel (8) and an L-shaped liquid outlet channel (9) are respectively provided on the transfer block (7), and the L-shaped liquid inlet channel (8) whose one end is connected to the liquid inlet (61) of the metering pump (6) and whose other end extends to one end of the transfer block (7). The transfer block (7) is connected to a side surface of the transfer block (7) and is connected to a glue supply channel (11) on a glue supply block (10); one end of the glue supply channel (11) away from the L-shaped liquid inlet channel (8) is connected to the glue supply unit via a glue supply pipe (12); the other end of the L-shaped liquid outlet channel (9) connected to the liquid outlet (62) of the metering pump (6) at one end extends to the other side surface of the transfer block (7) and is connected to the glue inlet (51) on the glue dispensing valve (5) via a connecting block (13) provided with a connecting channel (131); and at least one heating tube (14) is embedded and installed in each of the transfer block (7), the glue supply block (10) and the connecting block (13); A dispensing head (16) is connected to the dispensing port (52) of the dispensing valve (5). The dispensing head (16) extends vertically and is rotatably mounted on a base plate (18) horizontally arranged below the dispensing valve (5) via a bearing (17). A motor (20) is mounted on the upper surface of the base plate (18) and located on one side of the dispensing valve. A driven gear (191) is sleeved on the outer side of the dispensing head (16) and located below the base plate (18). A driving gear (192) meshing with the driven gear (191) is drivingly connected to an output shaft of the motor (20).

2. The high-efficiency hot melt adhesive dispensing device according to claim 1, characterized in that: The motor (20) is mounted on the upper surface of the base plate (18) via a support seat (21); the lower end of the output shaft of the motor (20) is connected to a rotating shaft (23) via a coupling (22); the lower end of the rotating shaft (23) passes through the base plate (18) and is mounted with the driving gear (192).

3. The high-efficiency hot melt adhesive dispensing device according to claim 1, characterized in that: A mounting block (25) is provided between the glue feeding block of the glue dispensing valve (5) and the base plate (18); the upper portion of the glue dispensing head (16) is embedded in a mounting groove (251) provided on the lower surface of the mounting block (25) and is rotatably sealed with the inner wall of the mounting groove (251) through at least two rotating sealing rings (26); a glue feeding hole (252) is provided on the upper surface of the mounting block (25); the glue feeding hole (252) whose lower end is connected to the mounting groove (251) has its upper end connected to the glue outlet (52); and a sealing portion of a glue sealing head is embedded in the glue feeding hole (252) and is gap-matched with the inner wall of the glue feeding hole (252).

4. The high-efficiency hot melt adhesive dispensing device according to claim 1, characterized in that: The adapter block (7), the glue supply block (10) and the connection block (13) are all metal blocks.

5. The high-efficiency hot melt adhesive dispensing device according to claim 1, characterized in that: A heating tube (14) is embedded and installed on the adapter block (7) and the connection block (13), and a heating tube (14) is embedded and installed on both sides of the L-shaped liquid inlet flow channel (8) and the L-shaped liquid outlet flow channel (9) on the glue supply block (10).

6. The high-efficiency hot melt adhesive dispensing device according to claim 1, characterized in that: A temperature sensor (38) is installed on the adapter block (7) and located on one side of the heating tube (14).

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