Hot melt adhesive stock bin

Abstract

The utility model discloses a hot melt adhesive stock bin, which relates to the technical field of coating equipment, and comprises a cavity 1 and a cover body 2, the cover body 2 is provided with a feed port 3, an air inlet 4, an air outlet 5, a pressure sensor 6 for detecting the pressure in the cavity 1, a first liquid level detection piece 7 for detecting the upper limit liquid level and a second liquid level detection piece 8 for detecting the lower limit liquid level, a heating interlayer 20 is arranged outside the cavity 1 in a sleeving manner, and a discharge hole 9 is formed in the lower end of the cavity 1 and is connected with a coating die head 10. The hot melt adhesive stock bin has the advantages of being simple in structure, convenient to clean and capable of achieving stable discharging.

Description

Technical Field

[0001] The utility model belongs to the technical field of coating equipment, and particularly relates to a hot melt adhesive storage bin. Background Art

[0002] In the existing coating equipment, the hot melt adhesive in the hot melt adhesive storage bin enters the coating die head by gravity, and the coating die head applies the glue to the material. The hot melt adhesive storage bin usually adopts an open design. When feeding, a first-stage gear pump is used to pump the material into the storage bin, and a second-stage gear pump is used for discharging the material from the coating die head for coating. During the feeding and discharging process of the hot melt adhesive storage bin, the pressure in the storage bin will fluctuate, thus affecting the discharging and coating accuracy. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a hot melt adhesive storage bin with a simple structure, easy to clean, and capable of realizing stable discharging.

[0004] To solve the above technical problem, the utility model adopts the following technical solutions:

[0005] A hot melt adhesive storage bin includes a cavity 1 and a cover body 2. The cover body 2 is provided with a feed inlet 3, an air inlet 4, an exhaust port 5, a pressure sensor 6 for detecting the pressure in the cavity 1, a first liquid level detection member 7 for detecting the upper limit liquid level, and a second liquid level detection member 8 for detecting the lower limit liquid level. The outside of the cavity 1 is sleeved with a heating interlayer 20. The lower end of the cavity 1 is provided with a discharge port 9, and the discharge port 9 is connected to a coating die head 10. It has a simple structure, is easy to clean, and can realize stable discharging, thus ensuring the coating accuracy.

[0006] As a further improvement of the above technical solution:

[0007] The cover body is provided with a viewing window 12 for easy observation.

[0008] The cover body is provided with a handle 13 for easy transportation, disassembly and assembly.

[0009] The first liquid level detection member 7 and the second liquid level detection member 8 are infrared detection switches. The liquid level detection members can detect without contacting the hot melt adhesive, which is convenient for cleaning.

[0010] The pressure sensor 6 is a high-temperature pressure sensor 6, which is not easily damaged and is suitable for the high-temperature environment required by the hot melt adhesive.

[0011] The air inlet 4 is connected to an air inlet pipe 14, and a first proportional flow regulating valve 15 is arranged on the air inlet pipe 14. The exhaust port 5 is connected to an exhaust pipe 16, and a second proportional flow regulating valve 17 is arranged on the exhaust pipe 16. The pressure in the cavity 1 is adjusted in time through the proportional flow regulating valve to ensure stable discharging.

[0012] The exhaust pipe 16 is connected to the pressure relief pipe 18, and a vacuum generator 19 is provided on the pressure relief pipe 18.

[0013] The two sides of the cavity 1 are provided with inclined side walls. The cavity 1 is a trapezoid body, and the discharge port 9 is arranged along the length direction of the bottom of the cavity 1, which is convenient for docking with the coating die head 10 to achieve stable discharging.

[0014] The heating sandwich layer 20 is connected to the liquid inlet 21 and the liquid outlet 22. The liquid inlet 21 is arranged at the upper end of the cavity 1, and the liquid outlet 22 is arranged at the lower end of the cavity 1. The liquid inlet 21 and the liquid outlet 22 are located on opposite sides of the cavity 1 to ensure heating and heat preservation of the entire cavity 1, ensure uniform temperature, and thus ensure the fluidity and uniformity of the hot melt adhesive.

[0015] The feed inlet 3 is connected to the feed pipe 11. The feed pipe 11 extends into the cavity 1, and the outlet of the feed pipe 11 is located below the lower limit liquid level detected by the second liquid level detection member 8. During feeding, feeding is realized below the liquid level, avoiding the generation of bubbles, realizing stable feeding, and reducing the influence on the internal pressure of the cavity 1.

[0016] Compared with the prior art, the advantages of the present utility model are as follows:

[0017] For the hot melt adhesive storage bin of the present utility model, the feed inlet 3, the air inlet 4, the exhaust port 5, the pressure sensor 6 for detecting the pressure in the cavity 1, the first liquid level detection member 7 and the second liquid level detection member 8 are all arranged on the cover body 2. Arranging on the cover body 2 is convenient for the installation of each component, has a simple structure, is easy to clean, and does not affect the setting of the heating sandwich layer 20 and the discharge port 9 on the cavity 1. When the hot melt adhesive is transported into the cavity 1 through the feed inlet 3 and transported out of the cavity 1 through the discharge port 9, the air inlet 4 and the exhaust port 5 intake or exhaust air according to the signal of the pressure sensor 6, so that the pressure in the cavity 1 is maintained stable, ensuring stable discharging, and thus ensuring the coating accuracy. Description of the Drawings

[0018] Figure 1 is a perspective view of a hot melt adhesive storage bin of the present utility model;

[0019] Figure 2 is a cross-sectional view of a hot melt adhesive storage bin of the present utility model.

[0020] Explanation of the reference numerals of the present utility model in the drawings: 1, cavity; 2, cover body; 3, feed inlet; 4, air inlet; 5, exhaust port; 6, pressure sensor; 7, first liquid level detection member; 8, second liquid level detection member; 9, discharge port; 10, coating die head; 11, feed pipe; 12, window; 13, handle; 14, air inlet pipe; 15, first proportional flow regulating valve; 16, exhaust pipe; 17, second proportional flow regulating valve; 18, pressure relief pipe; 19, vacuum generator; 20, heating sandwich layer; 21, liquid inlet; 22, liquid outlet. Detailed implementation mode

[0021] The present utility model will be further described in detail below in conjunction with the specification drawings and specific embodiments.

[0022] As Figures 1 to 2 shown, a hot melt adhesive storage bin includes a cavity 1 and a cover 2. The cover 2 is provided with a feed inlet 3, an air inlet 4, an exhaust outlet 5, a pressure sensor 6 for detecting the pressure inside the cavity 1, a first liquid level detection member 7 for detecting the upper limit liquid level, and a second liquid level detection member 8 for detecting the lower limit liquid level. A heating sandwich layer 20 is sleeved outside the cavity 1. The lower end of the cavity 1 is provided with a discharge outlet 9, and the discharge outlet 9 is connected to a coating die head 10. The feed inlet 3, the air inlet 4, the exhaust outlet 5, the pressure sensor 6 for detecting the pressure inside the cavity 1, the first liquid level detection member 7, and the second liquid level detection member 8 are all arranged on the cover 2. Arranging them on the cover 2 facilitates the installation of each component, has a simple structure, is easy to clean, and does not affect the setting of the heating sandwich layer 20 and the discharge outlet 9 on the cavity 1. When the hot melt adhesive is transported into the cavity 1 through the feed inlet 3 and transported outside the cavity 1 through the discharge outlet 9, the air inlet 4 and the exhaust outlet 5 intake or exhaust air according to the signal of the pressure sensor 6, so that the pressure inside the cavity 1 is maintained at a stable level, ensuring stable discharge and thus ensuring coating accuracy.

[0023] The cover is provided with a viewing window 12, which is convenient for observation. When the sensor is damaged, the liquid level situation can also be observed.

[0024] The cover is provided with a handle 13, and the handle 13 is arranged on the upper surface and the side of the cover, which is convenient for transportation, disassembly and assembly.

[0025] The first liquid level detection member 7 and the second liquid level detection member 8 are infrared detection switches. The liquid level detection members can detect without contacting the hot melt adhesive, which is convenient for cleaning.

[0026] The pressure sensor 6 is a high-temperature pressure sensor 6, which is not easily damaged and is suitable for the high-temperature environment required by the hot melt adhesive.

[0027] The air inlet 4 is connected to an air inlet pipe 14, and a first proportional flow regulating valve 15 is arranged on the air inlet pipe 14. The exhaust outlet 5 is connected to an exhaust pipe 16, and a second proportional flow regulating valve 17 is arranged on the exhaust pipe 16. The pressure inside the cavity 1 is adjusted in time through the proportional flow regulating valve to ensure stable discharge.

[0028] The exhaust pipe 16 is connected to a pressure relief pipe 18, and a vacuum generator 19 is arranged on the pressure relief pipe 18.

[0029] The two sides of the cavity 1 are provided with inclined side walls. The cavity 1 is a trapezoid body, and the discharge outlet 9 is arranged along the length direction of the bottom of the cavity 1, which is convenient for docking with the coating die head 10 to achieve stable discharge.

[0030] The heating jacket 20 connects the liquid inlet 21 and the liquid outlet 22. The liquid inlet 21 is arranged at the upper end of the cavity 1, and the liquid outlet 22 is arranged at the lower end of the cavity 1. The liquid inlet 21 and the liquid outlet 22 are located on opposite sides of the cavity 1, ensuring heating and heat preservation of the entire cavity 1, ensuring uniform temperature, and thus ensuring the fluidity and uniformity of the hot melt adhesive.

[0031] The feed inlet 3 is connected to the feed pipe 11. The feed pipe 11 extends into the interior of the cavity 1, and the outlet of the feed pipe 11 is located below the lower limit liquid level detected by the second liquid level detection member 8. During feeding, feeding is realized below the liquid level, avoiding the generation of bubbles, realizing stable feeding, and reducing the influence on the internal pressure of the cavity 1.

[0032] A sealing ring is provided between the cavity 1 and the cover body 2 and is fixed by a locking member. When cleaning is required, the locking member is disassembled, and the cover body 2 is lifted by the handle 13, so that the cavity 1, the cover body 2, and each component provided on the cover body 2 can be cleaned separately. By controlling the liquid level, the pressure sensor 6, the first liquid level detection member 7, and the second liquid level detection member 8 provided on the cover body 2 will not come into contact with the hot melt adhesive, reducing the cleaning difficulty.

[0033] During the production process, the cover body 2 is assembled and locked to the cavity 1 to ensure the sealed connection between the cavity 1 and the cover body 2. The hot melt adhesive is fed through the feed inlet 3, and the gear pump pumps the hot melt adhesive into the cavity 1. When the first liquid level detection member 7 detects that the liquid level of the hot melt adhesive reaches the upper limit position, feeding stops, the first proportional flow regulating valve 15 on the air inlet pipe 14 and the second proportional flow regulating valve 17 on the exhaust pipe 16 are closed, the vacuum generator 19 is turned on, and the interior of the closed cavity 1 is evacuated. When the pressure sensor 6 detects that the pressure in the cavity reaches the first set value, the vacuum generator 19 is turned off, and the first proportional flow regulating valve 15 on the air inlet pipe 14 is opened to inject nitrogen into the cavity 1. When the pressure sensor 6 detects that the pressure in the cavity 1 reaches the second set value, the coating die head 10 operates for coating. After continuous coating, the hot melt adhesive is consumed and the liquid level in the cavity 1 drops. At this time, the first proportional flow regulating valve 15 remains open to maintain nitrogen injection, so that the pressure in the cavity 1 is maintained stable to achieve stable discharging. When the second liquid level sensor 8 detects that the liquid level of the hot melt adhesive reaches the lower limit position, the hot melt adhesive is input into the cavity 1 through the feed inlet 3. As the liquid level rises and the pressure detected by the pressure sensor 13 is higher than the second set value, the second proportional flow regulating valve 17 on the exhaust pipe 16 is opened to continuously relieve pressure, ensuring that the pressure in the cavity 1 is maintained constant, avoiding the influence of pressure fluctuations during the feeding process on the coating process, and enabling continuous and stable production without stopping the machine for feeding.

[0034] Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present utility model by using the technical content disclosed above, or modify it into an equivalent embodiment with equivalent changes. Therefore, all content that does not depart from the technical solution of the present utility model, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present utility model shall fall within the scope of protection of the technical solution of the present utility model.

Claims

1. A hot melt adhesive silo, characterized in that: The invention comprises a cavity (1) and a cover (2); the cover (2) is provided with a feed port (3), an air inlet (4), an air outlet (5), a pressure sensor (6) for detecting the pressure in the cavity (1), a first liquid level detection component (7) for detecting the upper limit liquid level, and a second liquid level detection component (8) for detecting the lower limit liquid level; the cavity (1) is provided with a heating interlayer (20) on the outside; the cavity (1) is provided with a discharge port (9) at the lower end; and the discharge port (9) is connected to a coating die head (10).

2. A hot melt adhesive silo as claimed in claim 1, characterized in that: The cover body is provided with a viewing window (12).

3. A hot melt adhesive silo as claimed in claim 1, characterized in that: The cover body is provided with a handle (13).

4. A hot melt adhesive silo as claimed in claim 1, characterized in that: The first liquid level detection component (7) and the second liquid level detection component (8) are infrared detection switches.

5. A hot melt adhesive silo as claimed in claim 1, characterized in that: The pressure sensor (6) is a high-temperature pressure sensor (6).

6. A hot melt adhesive silo as claimed in claim 1, characterized in that: The air inlet (4) is connected to an air inlet pipe (14), and a first proportional flow regulating valve (15) is provided on the air inlet pipe (14); the air outlet (5) is connected to an exhaust pipe (16), and a second proportional flow regulating valve (17) is provided on the exhaust pipe (16).

7. A hot melt adhesive silo as claimed in claim 6, characterized in that: The exhaust pipe (16) is connected to a pressure relief pipe (18), and a vacuum generator (19) is provided on the pressure relief pipe (18).

8. A hot melt adhesive silo as claimed in claim 1, characterized in that: Inclined side walls are provided on both sides of the cavity (1); the cavity (1) is a trapezoidal body; and the discharge port (9) is arranged along the length direction of the bottom of the cavity (1).

9. A hot melt adhesive silo as claimed in claim 1, characterized in that: The heating interlayer (20) is connected to a liquid inlet (21) and a liquid outlet (22); the liquid inlet (21) is arranged at the upper end of the cavity (1); the liquid outlet (22) is arranged at the lower end of the cavity (1); and the liquid inlet (21) and the liquid outlet (22) are located on opposite sides of the cavity (1).

10. A hot melt adhesive silo as claimed in claim 1, characterized in that: The feed port (3) is connected to a feed pipe (11), the feed pipe (11) extends into the interior of the cavity (1), and the outlet of the feed pipe (11) is located below the lower limit liquid level detected by the second liquid level detection component (8).

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