Hot melt adhesive screw valve assembly

Abstract

The utility model discloses a hot melt adhesive screw valve assembly, which comprises a screw valve main body, a pipe sleeve and a blanking pipe, the output of the screw valve main body is fixedly provided with a rotating rod through a coupling, one end of the bottom of the rotating rod is fixedly provided with a screw rod, the tail end of the screw rod is fixedly provided with an electromagnet, and the electromagnet is fixedly connected with the pipe sleeve. A discharging nozzle is fixedly arranged on the outer wall of the bottom of the discharging pipe through an open hole, the discharging nozzle comprises a discharging channel, positioning pieces distributed at equal intervals are fixedly arranged on the inner wall of the bottom of the discharging pipe, and a vertically-downward positioning sleeve is fixedly arranged at one end of each positioning piece. The electromagnet is started to generate magnetic force, the electromagnet and the magnetic sheet repel each other, the magnetic sheet is pushed through the electromagnet, the sealing rod arranged at the bottom of the magnetic sheet slides on the inner wall of the positioning sleeve, the sealing rod is inserted into the inner wall of the discharging channel, and the state that the outside is connected with hot melt adhesive in the discharging pipe is blocked through the sealing rod; and the condition of wire drawing in the hot melt adhesive collecting process can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of glue dispensing, in particular to a hot melt glue screw valve component. Background Art

[0002] With the advancement of science and technology, hot melt adhesive dispensing operations are gradually becoming mature. In developed countries, hot melt adhesives have accounted for more than 20% of the synthetic adhesive market, while in my country, it is less than 10%, which means that there is still huge room for the potential of China's hot melt adhesive market. In addition, environmental protection has become a global theme, and environmental protection regulations are becoming increasingly stringent. In the adhesive family, hot melt adhesive is the most typical environmentally friendly adhesive. Because it does not contain solvents and is 100% solid, it conforms to the development trend and has achieved rapid development.

[0003] The molten adhesive is generally a low-temperature hot melt adhesive, and the heating temperature is 120-160°C. When the hot melt adhesive is heated to the applicable temperature, the viscosity is still relatively high. After the hot melt adhesive is sprayed out of the nozzle, the colloid remains connected to the hot melt adhesive in the cavity through the nozzle. Therefore, wire drawing is prone to occur during the adhesive collection process. For this reason, we propose a hot melt adhesive screw valve assembly. Utility Model Content

[0004] The utility model aims to provide a hot melt adhesive screw valve assembly to solve the above-mentioned technical deficiencies.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hot melt adhesive screw valve assembly, comprising a screw valve body, a pipe sleeve and a feed pipe, the pipe sleeve is fixed to the bottom outer wall of the screw valve body, the feed pipe is arranged at the bottom of the pipe sleeve, the output of the screw valve body is fixed with a rotating rod through a coupling, a spiral rod is fixedly provided at one end of the bottom of the rotating rod, an electromagnet is fixedly provided at the end of the spiral rod, a discharge nozzle is fixedly provided through an opening on the bottom outer wall of the feed pipe, the discharge nozzle includes a discharge channel, positioning pieces distributed at equal distances are fixedly provided on the bottom inner wall of the feed pipe, a positioning sleeve is fixedly provided at one end of the positioning piece pointing vertically downward, a sealing rod is inserted into the inner wall of the positioning sleeve, a magnetic piece is fixedly provided at the top end of the sealing rod, the magnetic piece is located directly below the electromagnet, and the outer wall contour of the sealing rod is matched with the inner wall contour of the discharge channel.

[0006] Preferably, a first slot is formed on the bottom inner wall of the tube sleeve, a second slot is formed on the top inner wall of the feed tube, and heating blocks are inserted into the inner walls of the first slot and the second slot.

[0007] Preferably, limit strips are fixedly provided on the outer walls on both sides of the heating block, and limit grooves are provided on the inner walls on both sides of the first slot, and the inner wall contour of the limit grooves is adapted to the outer wall contour of the limit strips, thereby preventing the heating block from rotating on the inner walls of the first slot and the second slot.

[0008] Preferably, a spiral conveying hole extending vertically downward is opened at one end of the top of the heating block, and the spiral rod is located on the inner wall of the spiral conveying hole. The spiral rod rotates on the inner wall of the spiral conveying hole to convey the colloid downward.

[0009] Preferably, the magnetic forces of the electromagnet and the magnetic sheet repel each other, and the electromagnet repels the magnetic sheet when it is started, and the magnetic sheet is adsorbed on the outer wall of the electromagnet when it is turned off.

[0010] Preferably, a feed pipe is connected to an outer wall of one side of the tube sleeve through an opening, and a pipe joint is connected to the end of the feed pipe, which is connected to an external hot melt adhesive container through the pipe joint to facilitate the input of hot melt adhesive into the tube sleeve.

[0011] Preferably, the bottom outer wall of the pipe sleeve is provided with an external threaded interface, and the top outer wall of the feed pipe is provided with an internal threaded interface, and the outer wall of the external threaded interface is threadedly connected with the inner wall of the internal threaded interface to facilitate screwing the feed pipe into the bottom of the pipe sleeve.

[0012] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0013] The electromagnet is activated to generate magnetic force, and the electromagnet repels the magnetic sheet. The magnetic sheet is pushed by the electromagnet, and a sealing rod provided at the bottom of the magnetic sheet slides on the inner wall of the positioning sleeve. The sealing rod is inserted into the inner wall of the discharge channel. The sealing rod blocks the connection between the outside world and the hot melt adhesive inside the discharge pipe, thereby avoiding the phenomenon of wire drawing during the hot melt adhesive collection process. The use effect is good and the practicability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0015] Figure 1 This is a three-dimensional structural schematic diagram of a hot melt adhesive screw valve assembly of the utility model;

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of a pipe sleeve of a hot melt adhesive screw valve assembly of the utility model;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of a feed pipe of a hot melt adhesive screw valve assembly of the utility model;

[0018] Figure 4 This is a schematic diagram of the cross-sectional structure of a heating block of a hot melt adhesive screw valve assembly of the utility model;

[0019] Figure 5 The utility model is a schematic diagram of the sealing rod structure of a hot melt adhesive screw valve assembly.

[0020] Description of reference numerals:

[0021] 1 screw valve body, 2 pipe sleeve, 3 feed pipe, 4 feed pipe, 5 pipe joint, 6 first slot, 7 limit slot, 8 second slot, 9 heating block, 10 limit card strip, 11 spiral conveying hole, 12 rotating rod, 13 spiral rod, 14 electromagnet, 15 positioning sheet, 16 positioning sleeve, 17 sealing rod, 18 magnetic sheet, 19 discharge nozzle, 20 discharge channel, 21 external thread interface, 22 internal thread interface. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] Embodiment 1

[0024] Refer to the instruction manual Figure 1-5 A hot melt adhesive screw valve assembly comprises a screw valve body 1, a pipe sleeve 2 and a discharge pipe 3. The pipe sleeve 2 is fixed to the bottom outer wall of the screw valve body 1, and the discharge pipe 3 is arranged at the bottom of the pipe sleeve 2. The output of the screw valve body 1 is fixed with a rotating rod 12 through a coupling, and a spiral rod 13 is fixed at one end of the bottom of the rotating rod 12. An electromagnet 14 is fixed at the end of the spiral rod 13. A discharge nozzle 19 is fixed at the bottom outer wall of the discharge pipe 3 through an opening. The discharge nozzle 19 includes a discharge channel 20. The bottom inner wall of the discharge pipe 3 is fixed with equidistantly distributed positioning pieces 15, and one end of the positioning piece 15 is fixed with a vertically downward positioning sleeve 16. A sealing rod 17 is inserted into the inner wall of the positioning sleeve 16. A magnetic piece 18 is fixed at one end of the top of the sealing rod 17. The magnetic piece 18 is located directly below the electromagnet 14. The outer wall contour of the sealing rod 17 is adapted to the inner wall contour of the discharge channel 20.

[0025] Embodiment 2

[0026] Based on the first embodiment, a first card slot 6 is opened on the bottom inner wall of the pipe sleeve 2, and a second card slot 8 is opened on the top inner wall of the discharge pipe 3. A heating block 9 is inserted into the inner walls of the first card slot 6 and the second card slot 8. Limiting strips 10 are fixedly provided on the outer walls of both sides of the heating block 9. Limiting slots 7 are opened on the inner walls of both sides of the first card slot 6. The inner wall contour of the limiting slot 7 is adapted to the outer wall contour of the limiting strip 10, which can prevent the heating block 9 from rotating on the inner walls of the first card slot 6 and the second card slot 8. A vertical downward spiral conveying hole 11 is opened at one end of the top of the heating block 9, and the screw rod 13 is located on the inner wall of the spiral conveying hole 11. The spiral rod 13 rotates on the inner wall of the spiral conveying hole 11 to convey the colloid downward.

[0027] Embodiment 3

[0028] Based on the first embodiment, the magnetic forces of the electromagnet 14 and the magnetic sheet 18 repel each other. When the electromagnet 14 is started, it repels the magnetic sheet 18. When the electromagnet 14 is turned off, the magnetic sheet 18 is adsorbed on the outer wall of the electromagnet 14. One side outer wall of the pipe sleeve 2 is connected with a feed pipe 4 through an opening. The end of the feed pipe 4 is connected with a pipe joint 5, which is connected to an external hot melt adhesive container through the pipe joint 5, so as to facilitate the input of the hot melt adhesive into the pipe sleeve 2. An external threaded interface 21 is provided on the bottom outer wall of the pipe sleeve 2, and an internal threaded interface 22 is provided on the top outer wall of the discharge pipe 3. The outer wall of the external threaded interface 21 is threadedly connected with the inner wall of the internal threaded interface 22, so as to facilitate the discharge pipe 3 to be screwed into the bottom of the pipe sleeve 2.

[0029] Working principle of this utility model:

[0030] Refer to the instruction manual Figure 1-5 When the utility model is used, the pipe joint 5 provided at one end of the feed pipe 4 is first connected to the hot melt adhesive container, and the hot melt adhesive is input into the pipe sleeve 2. The output shaft of the screw valve body 1 drives the rotating rod 12 to rotate. The rotating rod 12 drives the spiral rod 13 to rotate on the inner wall of the spiral conveying hole 11, and the colloid in the pipe sleeve 2 is input into the discharge pipe 3 through the spiral conveying hole 11. The colloid is heated to 120-160°C through the spiral conveying hole 11 opened on the heating block 9. The colloid in the discharge pipe 3 is sprayed out through the discharge nozzle 19. When the glue is stopped, the output shaft of the screw valve body 1 stops rotating. After the output shaft of the screw valve body 1 stops rotating, the colloid is discharged through the spiral rod 13 at one end at the bottom. Some electromagnets 14 are started to generate magnetic force, and the electromagnets 14 and the magnetic pieces 18 repel each other. The magnetic pieces 18 are pushed by the electromagnet 14, and the sealing rod 17 provided at the bottom of the magnetic pieces 18 slides on the inner wall of the positioning sleeve 16. The sealing rod 17 is inserted into the inner wall of the discharge channel 20. The sealing rod 17 blocks the connection between the outside and the hot melt adhesive inside the discharge pipe 3, which can avoid the phenomenon of wire drawing during the hot melt adhesive collection process. The use effect is good and the practicability is strong. When the glue needs to be discharged, the electromagnet 14 stops starting, and the magnetic piece 18 relies on its own magnetism to be adsorbed on the electromagnet 14. The magnetic piece 18 drives the sealing rod 17 to be pulled out from the inner wall of the discharge channel 20, and the glue continues to be discharged through the discharge nozzle 19.

[0031] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A hot melt adhesive screw valve assembly, comprising a screw valve body (1), a pipe sleeve (2) and a feed pipe (3), wherein the pipe sleeve (2) is fixed to the bottom outer wall of the screw valve body (1), and the feed pipe (3) is arranged at the bottom of the pipe sleeve (2), characterized in that: The output of the screw valve body (1) is fixedly provided with a rotating rod (12) through a coupling, a spiral rod (13) is fixedly provided at one end of the bottom of the rotating rod (12), an electromagnet (14) is fixedly provided at the end of the spiral rod (13), a discharge nozzle (19) is fixedly provided through an opening on the bottom outer wall of the discharge tube (3), the discharge nozzle (19) includes a discharge channel (20), and positioning pieces (15) are fixedly provided on the bottom inner wall of the discharge tube (3) at equal distances, a positioning sleeve (16) is fixedly provided at one end of the positioning piece (15) and vertically downward, a sealing rod (17) is inserted into the inner wall of the positioning sleeve (16), a magnetic piece (18) is fixedly provided at one end of the top of the sealing rod (17), and the magnetic piece (18) is located directly below the electromagnet (14), and the outer wall contour of the sealing rod (17) is adapted to the inner wall contour of the discharge channel (20).

2. A hot melt adhesive screw valve assembly according to claim 1, characterized in that: The bottom inner wall of the pipe sleeve (2) is provided with a first slot (6), the top inner wall of the feed pipe (3) is provided with a second slot (8), and the inner walls of the first slot (6) and the second slot (8) are plugged with heating blocks (9).

3. A hot melt adhesive screw valve assembly according to claim 2, characterized in that: Limiting clips (10) are fixedly provided on the outer walls of both sides of the heating block (9), and limiting grooves (7) are provided on the inner walls of both sides of the first slot (6), and the inner wall contour of the limiting groove (7) is matched with the outer wall contour of the limiting clips (10).

4. A hot melt adhesive screw valve assembly according to claim 3, characterized in that: A spiral conveying hole (11) extending vertically downward is formed at one end of the top of the heating block (9), and the spiral rod (13) is located on the inner wall of the spiral conveying hole (11).

5. The hot melt adhesive screw valve assembly according to claim 1, characterized in that: The magnetic forces of the electromagnet (14) and the magnetic sheet (18) repel each other.

6. A hot melt adhesive screw valve assembly according to claim 1, characterized in that: One side outer wall of the pipe sleeve (2) is connected to a feed pipe (4) through an opening, and the end of the feed pipe (4) is connected to a pipe joint (5).

7. A hot melt adhesive screw valve assembly according to claim 1, characterized in that: The bottom outer wall of the pipe sleeve (2) is provided with an external threaded interface (21), the top outer wall of the feed pipe (3) is provided with an internal threaded interface (22), and the outer wall of the external threaded interface (21) is threadedly connected with the inner wall of the internal threaded interface (22).

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