Dispensing mechanism for hot melt adhesive

Abstract

The utility model discloses a hot melt adhesive dispensing mechanism which comprises an adhesive supply unit, an adhesive dispensing valve and a metering pump respectively connected with the adhesive dispensing valve, a switching block is arranged below the metering pump, one end of an L-shaped liquid inlet runner is communicated with a liquid inlet of the metering pump, and the other end of the L-shaped liquid inlet runner extends to be communicated with an adhesive supply runner on an adhesive supply block. One end, far away from the L-shaped liquid inlet flow channel, of the glue supply flow channel is connected with the glue supply unit through a glue supply pipe, the other end of the L-shaped liquid outlet flow channel with one end communicated with a liquid outlet of the metering pump extends to be communicated with a glue inlet in the dispensing valve through a connecting block, and at least one heating pipe is embedded in each of the switching block, the glue supply block and the connecting block. On the basis that glue is metered and pressurized, hot melt glue can be selected to shorten the curing time after glue dispensing, the occupied workshop area in the photovoltaic glass machining process is further saved, real-time heating can be carried out to guarantee the fluidity of the hot melt glue, and therefore the glue dispensing precision and effect are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of glue dispensing, in particular to a glue dispensing mechanism 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. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a hot melt adhesive dispensing mechanism, which can use hot melt adhesive to shorten the curing time after dispensing on the basis of realizing the metering and pressurization of glue, thereby saving the workshop area occupied in the photovoltaic glass processing process, and can also perform real-time heating to ensure the fluidity of the hot melt adhesive, thereby ensuring the accuracy and effect of dispensing.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a hot melt adhesive dispensing mechanism, comprising: respectively connected to a glue supply unit, a glue dispensing valve and a metering pump connected to the glue dispensing valve, the liquid inlet of the metering pump is connected to the glue supply unit, the glue inlet on the glue dispensing valve is connected to the liquid outlet of the metering pump, a transfer block is arranged below the metering pump, an L-shaped liquid inlet flow channel and an L-shaped liquid outlet flow channel are respectively provided on the transfer block, the other end of the L-shaped liquid inlet flow channel connected to the liquid inlet of the metering pump at one end extends to a side surface of the transfer 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, the other end of the L-shaped liquid outlet flow channel connected to the liquid outlet of the metering pump at one end extends to the other side surface of the transfer 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 tube is embedded and installed on each of the transfer block, the glue supply block and the connecting block.

[0006] The further improved scheme in the above technical scheme is as follows:

[0007] 1. In the above solution, the adapter block, glue supply block and connection block are all metal blocks.

[0008] 2. In the above solution, the transfer block, the glue supply block and the connection block are all stainless steel blocks.

[0009] 3. In the above solution, the adapter block and the glue supply block are connected via a bottom substrate.

[0010] 4. In the above scheme, a heating tube is embedded and installed on the adapter block and the connecting block, and a heating tube is embedded and installed on both sides of the L-shaped liquid inlet channel and the L-shaped liquid outlet channel on the glue supply block.

[0011] 5. In the above solution, a temperature sensor is installed on the adapter block and located on one side of the heating tube.

[0012] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0013] The utility model discloses a hot melt adhesive dispensing mechanism, wherein a transfer block is arranged below a metering pump, wherein an L-shaped liquid inlet flow channel and an L-shaped liquid outlet flow channel are respectively arranged on the transfer block, wherein one end of the L-shaped liquid inlet flow channel is connected with a liquid inlet of the metering pump, and the other end of the L-shaped liquid inlet flow channel extends to a side surface of the transfer block and is connected with a glue supply flow channel on a glue supply block, wherein one end of the glue supply flow channel away from the L-shaped liquid inlet flow channel is connected with a glue supply unit through a glue supply hose, and the other end of the L-shaped liquid outlet flow channel, which is connected with a liquid outlet of the metering pump, extends to the other end of the transfer block. A side surface is connected to the glue inlet on the glue dispensing valve through a connecting block with a connecting flow channel. The adapter block, the glue supply block and the connecting block are each embedded with at least one heating tube. On the basis of realizing the metering and pressurization of the glue, hot melt glue can be used to shorten the curing time after glue dispensing, thereby saving the workshop area occupied in the photovoltaic glass processing process, and the glue can be heated in real time during the whole process of supplying glue to the glue dispensing valve to ensure the fluidity of the hot melt glue, thereby ensuring the accuracy and effect of glue dispensing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 It is a structural schematic diagram of the dispensing mechanism of the hot melt adhesive of the utility model;

[0015] Attached Figure 2 For the utility model Figure 1 Schematic diagram of the cross section along AA;

[0016] Attached Figure 3 It is a partial structural schematic diagram of the hot melt adhesive dispensing mechanism of the utility model;

[0017] Attached Figure 4 For the utility model Figure 3 A cross-sectional view of the local structure.

[0018] In the above figures: 1. heating tube; 2. base plate; 3. temperature sensor; 4. dispensing valve; 5. glue inlet; 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 hose; 13. connecting block; 14. connecting channel. DETAILED DESCRIPTION

[0019] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.

[0020] Embodiment 1: A hot melt adhesive dispensing mechanism, comprising: a glue supply unit, a glue dispensing valve 4 and a metering pump 6 connected to the glue dispensing valve 4, respectively; a liquid inlet 61 of the metering pump 6 is connected to the glue supply unit; a glue inlet 5 on the glue dispensing valve 4 is connected to a 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 transfer block 7 On one side surface, the glue supply channel 11 is connected to 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, extends to the other side surface of the adapter block 7 and is connected to the glue inlet 5 on the glue dispensing valve 4 through a connecting block 13 with a connecting channel 14. At least one heating tube 1 is embedded and installed on each of the adapter block 7, the glue supply block 10 and the connecting block 13;

[0021] 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 through an external glue supply unit, such as a pressure plate pump, and the glue enters the liquid inlet of the metering pump through the L-shaped liquid inlet channel.

[0022] The above-mentioned adapter block 7, glue supply block 10 and connection block 13 are all metal blocks.

[0023] The adapter block 7 and the glue supply block 10 are connected via a bottom substrate 2 .

[0024] A heating tube 1 is embedded and installed on the adapter block 7 and the connection block 13 , and a heating tube 1 is embedded and installed on both sides of the L-shaped liquid inlet channel 8 and the L-shaped liquid outlet channel 9 on the glue supply block 10 .

[0025] Embodiment 2: A hot melt adhesive dispensing mechanism, comprising: a glue supply unit, a glue dispensing valve 4 and a metering pump 6 connected to the glue dispensing valve 4, respectively; a liquid inlet 61 of the metering pump 6 is connected to the glue supply unit; a glue inlet 5 on the glue dispensing valve 4 is connected to a 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 transfer block 7 On one side surface, the glue supply channel 11 is connected to 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, extends to the other side surface of the adapter block 7 and is connected to the glue inlet 5 on the glue dispensing valve 4 through a connecting block 13 with a connecting channel 14. At least one heating tube 1 is embedded and installed on each of the adapter block 7, the glue supply block 10 and the connecting block 13;

[0026] The liquid flows from the outlet of the metering pump through the L-shaped outlet channel and then through the connecting channel on the connecting block and finally enters the dispensing valve. During the entire process of the above-mentioned glue circulation, the glue is continuously heated by the heating tubes in each metal block to ensure that the hot melt adhesive always maintains a high temperature (about 150°C), thereby ensuring the fluidity of the glue.

[0027] The above-mentioned adapter block 7, glue supply block 10 and connection block 13 are all stainless steel blocks.

[0028] A heating tube 1 is embedded and installed on the adapter block 7 and the connection block 13 , and a heating tube 1 is embedded and installed on both sides of the L-shaped liquid inlet channel 8 and the L-shaped liquid outlet channel 9 on the glue supply block 10 .

[0029] A temperature sensor 3 is installed on the adapter block 7 and located on one side of the heating tube 1 .

[0030] The working principle of the utility model is as follows:

[0031] Through an external glue supply unit, such as a pressure plate pump, the hot melt glue 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, and then passes through the L-shaped liquid outlet channel from the liquid outlet of the metering pump and then passes through the connecting channel on the connecting block to finally enter the dispensing valve. During the whole process of the above-mentioned glue liquid circulation, the glue liquid is continuously heated by the heating tubes in each metal block to ensure that the hot melt glue always maintains a high temperature (about 150°C), thereby ensuring the fluidity of the glue. The metering pump is purchased from outside and is mainly used for metering and increasing. It does not belong to the invention point of this patent and will not be repeated here.

[0032] When the above-mentioned hot melt glue dispensing mechanism is used, on the basis of realizing the metering and pressurization of the glue, the hot melt glue can be used to shorten the curing time after dispensing, thereby saving the workshop area occupied during the photovoltaic glass processing process, and 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, thereby ensuring the accuracy and effect of dispensing.

[0033] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A hot melt adhesive dispensing mechanism, comprising: A metering pump (6) connected to a glue supply unit, a glue dispensing valve (4) and the glue dispensing valve (4), wherein the liquid inlet (61) of the metering pump (6) is connected to the glue supply unit, and the glue inlet (5) on the glue dispensing valve (4) 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 other end of the L-shaped liquid inlet channel (8) connected to the liquid inlet (61) of the metering pump (6) extends to a side surface of the transfer 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 via a glue supply tube (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 adapter block (7) and is connected to the glue inlet (5) on the glue dispensing valve (4) via a connecting block (13) provided with a connecting channel (14); and at least one heating tube (1) is embedded and installed in each of the adapter block (7), the glue supply block (10) and the connecting block (13).

2. The hot melt adhesive dispensing mechanism 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.

3. The hot melt adhesive dispensing mechanism according to claim 1, characterized in that: The transfer block (7), the rubber supply block (10) and the connection block (13) are all stainless steel blocks.

4. The hot melt adhesive dispensing mechanism according to claim 1, characterized in that: The adapter block (7) and the glue supply block (10) are connected via a bottom substrate (2).

5. The hot melt adhesive dispensing mechanism according to claim 1, characterized in that: A heating tube (1) is embedded and installed on the adapter block (7) and the connection block (13), and a heating tube (1) 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 rubber supply block (10).

6. The hot melt adhesive dispensing mechanism according to claim 1, characterized in that: A temperature sensor (3) is installed on the adapter block (7) and located on one side of the heating tube (1).

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