CN218502543U - Hot melt adhesive spray gun - Google Patents
Hot melt adhesive spray gun Download PDFInfo
- Publication number
- CN218502543U CN218502543U CN202222176952.1U CN202222176952U CN218502543U CN 218502543 U CN218502543 U CN 218502543U CN 202222176952 U CN202222176952 U CN 202222176952U CN 218502543 U CN218502543 U CN 218502543U
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- valve body
- needle valve
- valve core
- hot melt
- melt adhesive
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Abstract
The utility model discloses a hot melt adhesive spray gun, which comprises a valve body and a needle valve core arranged in the valve body, wherein the needle valve core can axially move relative to the valve body, the needle valve core is provided with a piston, the valve body is connected with the piston through a piston cavity, and the valve body is also provided with a glue inlet cavity communicated with a glue inlet channel; the outer edge of the piston is connected with the piston cavity through an X-shaped rubber sealing ring; the upper end and the lower end of the glue inlet cavity are respectively connected with the valve body through a sealing component sleeved on the needle valve core and a guide sleeve sleeved on the needle valve core; the lower end of the piston cavity is also provided with a sealing component sleeved on the needle valve core. The utility model discloses a valve body is outer along realizing with the sealed of valve body through X type rubber seal, and X type rubber seal has sealed effectual, two way seal's effect, can satisfy needle valve core high-frequency vibration's operation requirement. The guide sleeve with the triangular cross section design can play a good role in guiding the needle valve core while ensuring that the glue solution is not influenced to pass through, improves the concentricity between the needle valve core and the valve body channel, and further improves the gluing precision.
Description
Technical Field
The utility model relates to a hot melt adhesive spray gun belongs to hot melt adhesive equipment technical field.
Background
The hot melt adhesive spray gun is used for heating and applying the adhesive to the corresponding area of the product. In the prior art, the release and closing of the colloid inside the hot melt adhesive spray gun are controlled by an internal needle valve core, and the action of the needle valve core is realized by controlling the flow direction of an air path through an electromagnetic valve.
Although the principle that the on-off of the glue gun is controlled by switching the air path in the prior art already exists, the principle is widely applied to actual production. However, the requirements for the control frequency, the control precision and the service life of the needle valve core are higher and higher due to the improvement of the manufacturing process and the production efficiency, so that the structure has room for improvement.
The patent with the application number of 2014207101649 describes a reverse-pumping high-speed on-off fluid control valve applied to a hot melt adhesive gun, and the technical scheme has the characteristics of simplicity, rapid control and sensitive action, but in the patent, a support piece is not arranged between a reverse-pumping thimble (needle valve core) and a valve body at a glue outlet of a nozzle, so that the phenomenon that the reverse-pumping thimble is not concentric with a glue outlet channel is easily caused, and then glue is not uniformly discharged. Furthermore, in this patent, the sealing between the reverse-pumping thimble and the valve body still uses the conventional ring seal assembly. Similar problems exist with another patent application No. 2021222641342.
SUMMERY OF THE UTILITY MODEL
For solving the not enough of prior art, the utility model aims to provide a hot melt adhesive spray gun.
In order to achieve the above object, the utility model adopts the following technical scheme:
the hot melt adhesive spray gun comprises a valve body and a needle valve core arranged in the valve body, wherein the needle valve core can move axially relative to the valve body, the needle valve core is provided with a piston, the valve body is connected with the piston through a piston cavity, and the valve body is also provided with a glue inlet cavity communicated with a glue inlet channel;
the outer edge of the piston is connected with the piston cavity through an X-shaped rubber sealing ring;
the upper end and the lower end of the glue inlet cavity are respectively connected with the valve body through a sealing component sleeved on the needle valve core and a guide sleeve sleeved on the needle valve core;
the lower end of the piston cavity is also provided with a sealing component sleeved on the needle valve core.
Preferably, the sealing assembly of the hot melt adhesive spray gun comprises a flooding plug seal and a flat gasket, the flooding plug seal and the flat gasket are sleeved on the needle valve core, and the flat gasket is located at the end of the cavity body.
Preferably, a positioning spring sleeved on the needle valve core is further arranged between the guide sleeve and the flat gasket of the hot melt adhesive spray gun.
Preferably, the glue inlet channel of the hot melt adhesive spray gun is further provided with a filtering device.
Preferably, the filter device of the hot melt adhesive spray gun comprises a filter joint and a filter screen sleeved on the side of the filter joint.
Preferably, in the aforementioned hot melt adhesive spray gun, the filter screen comprises three layers of 150 mesh metal filter screen.
Preferably, the cross-section of the guide sleeve of the hot melt adhesive spray gun is triangular.
Preferably, the glue outlet end of the valve body of the hot melt adhesive spray gun is further provided with a straight nozzle, and the straight nozzle is detachably connected to the valve body through a nozzle locking nut.
Preferably, in the aforenoted hot melt adhesive spray gun, the piston is further provided with a valve-closing spring for urging the needle valve cartridge toward the closure device.
The utility model discloses the beneficial effect who reaches:
compared with the prior art, the utility model discloses an outer edge of valve body realizes with the sealed of valve body through X type rubber seal, and X type rubber seal has sealed effectual, two way seal's effect, can satisfy needle valve core high-frequency vibration's operation requirement.
Go into the upper end in gluey chamber, the lower extreme in piston chamber all is equipped with the seal assembly who cup joints in the needle case, and seal assembly seals and flat the pad including general stopper, and general stopper seals and can play better sealed effect, and flat pad then can seal to general stopper and carry out reliable isolation and fixed.
The guide sleeve with the triangular cross section is matched with a valve body channel with a circular cross section, so that a fan-shaped channel with three circumferentially and uniformly distributed channels is arranged between the guide sleeve and the valve body channel, the needle valve core can be well guided while the glue solution is guaranteed not to be influenced, the concentricity between the needle valve core and the valve body channel is improved, and the gluing precision is further improved.
The filter joint is internally provided with a filter screen which comprises three layers of 150-mesh metal filter screens, so that impurities in the glue solution can be filtered, the purity of the glue solution is ensured, and the strength and the heat resistance are ensured. The filter screen adopts the stainless steel filter screen, can select for use the filter screen of different mesh and number of piles according to the on-the-spot demand, reaches optimum filter effect. The joint outer shell and the inner sleeve are screwed by threads, so that the convenience in disassembly is ensured, and the sealing effect is also considered.
Drawings
Fig. 1 is a full sectional view of the present invention;
fig. 2 is a sectional view of the present invention;
FIG. 3 is a view of the needle valve element, seal assembly and guide sleeve of the present invention;
FIG. 4 is a structural view of the filtering apparatus of the present invention;
fig. 5 is an exploded view of the filter device of the present invention;
the meaning of the reference symbols in the figures: 1-control the trachea; 2-closing the valve spring; 3-a piston; 4-X type rubber seal ring; 5-a sealing component; 6-universal plugging; 7-flat cushion; 8-a valve body; 9-positioning spring; 10-needle valve core; 11-a sealing ring; 12-valve cover; 13-guiding sleeve; 14-straight nozzle; 15-a bellows; 16-a wire; 17-a connector housing; 171-side opening; 191-side through hole; 18-a filter screen; 19-inner sleeve; 101-control air holes; 81-piston cavity; 82-a glue inlet cavity; 20-nozzle lock nut.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The upper end described in this embodiment refers to the end far away from the hot melt adhesive tap, and the lower end refers to the end of the tap, i.e., the upper and lower ends in the view angles of fig. 1 and 2, which is merely for convenience of description, and the protection range cannot be limited by this.
As shown in fig. 1 to 5: the embodiment discloses a hot melt adhesive spray gun, including valve body 8, set up needle valve core 10 in valve body 8, needle valve core 10 can be for valve body 8 axial displacement, needle valve core 10 is equipped with piston 3, and valve body 8 passes through piston chamber 81 and connects piston 3. The two sides of the piston 3 are provided with control air holes 101 for communicating the control air pipes 1, and the movement of the piston 3 in the piston cavity 81 can be realized through the control of the two control air pipes 1. The upper end of the piston 3 is also provided with a valve closing spring 2, and the upper end of the valve closing spring 2 is connected with a valve body 8 and used for driving the needle valve core 10 to move towards the relation state.
The valve body 8 is internally provided with a thermocouple which is electrically connected with a power supply through a lead 16, and the outside of the lead 16 is provided with a corrugated pipe 15.
The valve body 8 is further provided with a glue inlet cavity 82 communicated with the glue inlet channel. The outer edge of the piston 3 of the embodiment is connected with the piston cavity 81 through an X-shaped rubber sealing ring 4. Compared with other sealing devices (such as an O-shaped sealing ring and a ring sleeve shaft seal) in the prior art, the X-shaped rubber sealing ring 4 has the greatest advantage of bidirectional sealing.
The upper end and the lower end of the glue inlet cavity 82 are respectively connected with the valve body 8 through the sealing component 5 sleeved on the needle valve core 10 and the guide sleeve 13 sleeved on the needle valve core 10. And the lower end of the piston cavity 81 is also provided with a sealing component 5 sleeved on the needle valve core 10.
The sealing assembly 5 comprises a flooding plug seal 6 and a flat gasket 7, the flooding plug seal 6 and the flat gasket 7 are both sleeved on the needle valve core 10, and the flat gasket 7 is positioned at the end of the cavity (the piston cavity 81 and the glue inlet cavity 82). A positioning spring 9 sleeved on the needle valve core 10 is also arranged between the guide sleeve 13 and the flat gasket 7 (of the lower end sealing component 5). The positioning spring 9 can position and press the seal assembly 5 by elastically pressing the seal assembly 5 at the lower end.
With reference to fig. 1, 4 and 5: the glue inlet channel of the embodiment is further provided with a filtering device, the filtering device comprises a joint outer shell 17, a filter screen 18 and an inner sleeve 19, the filter screen 18 is detachably mounted inside the joint outer shell 17 through the inner sleeve 19, the filter screen 18 is arranged between the inner sleeve 19 and the joint outer shell 17, and the joint outer shell 17 is detachably mounted on the valve body 8. The joint outer shell 17, the filter screen 18 and the inner sleeve 19 are made of metal materials, and strength and heat resistance are guaranteed. The end of the joint housing 17 has a threaded joint (either internal or external threads may be used). By adopting the combined filtering device, the filtering of the glue channel can be realized, and the filter screen 18 is convenient to clean and replace. The filter screen 18 can be made of stainless steel, and filter screens with different meshes and layers can be selected according to field requirements, so that the optimal filtering effect is achieved. The joint outer shell 17 and the inner sleeve 19 are screwed together by threads, so that the convenience in disassembly is ensured, and the sealing effect is also considered.
Specifically, the method comprises the following steps: the side of the joint housing 17 is provided with a side opening 171, and the side of the inner case 19 is provided with a side through hole 191 corresponding to the side opening 171. When the filter device is in a working state, the side opening 171 and the side through hole 191 are in a state of being opposite to each other, so that the whole filter device forms a glue inlet channel. The mesh openings of the screen 18 in the drawings are much larger than the actual mesh diameter for ease of illustration only, and in practice, it is preferred to use three layers 150 mesh metal screen for the screen 18.
As shown in FIG. 3, the cross-section of the guide sleeve 13 of the present embodiment is triangular, and a through hole for passing through the needle core 10 is formed at the center thereof. The guide sleeve 13 with the triangular cross section is matched with a valve body channel with a circular cross section, so that three fan-shaped channels with uniformly distributed circumferences are arranged between the guide sleeve and the valve body channel, and the needle valve core 10 can be well guided while the glue solution passing is not influenced. The pilot sleeve 13 is positioned inside the valve cover 12, the valve cover 12 is installed at the end of the valve body 8 through threads, and the surface of the valve cover 12 is also provided with a sealing ring 11.
The glue outlet end of the valve body 8 is also provided with a straight nozzle 14, the straight nozzle 14 is matched with the end part of the needle valve core 10, when the straight nozzle and the needle valve core are contacted, a sealing effect can be achieved, and when the straight nozzle and the needle valve core have a certain gap, an annular channel can be formed between the straight nozzle and the needle valve core. The straight nozzle 14 is detachably connected to the valve body 8 by a nozzle lock nut 19.
Compared with the prior art, the outer edge of the valve body 8 of the embodiment is sealed with the valve body 8 through the X-shaped rubber sealing ring 4, the X-shaped rubber sealing ring 4 has good sealing effect and bidirectional sealing effect, and the use requirement of high-frequency vibration of the needle valve core 10 can be met.
Enter the upper end of gluing chamber 82, the lower extreme of piston chamber 81 and all be equipped with the seal assembly 5 who cup joints in needle case 10, seal assembly 5 seals 6 and flat pad 7 including general stopper, general stopper seals 6 and can play better sealed effect, and flat pad 7 then can seal 6 to general stopper and carry out reliable isolation and fixed.
The guide sleeve 13 with the triangular cross section is matched with a valve body channel with a circular cross section, so that three fan-shaped channels with uniformly distributed circumferences are arranged between the guide sleeve and the valve body channel, the needle valve core 10 can be well guided while the passing of glue liquid is not influenced, the concentricity between the needle valve core 10 and the valve body channel is improved, and the gluing precision is further improved.
The filter joint 17 is internally provided with a filter screen 18, and the filter screen 18 comprises three layers of 150-mesh metal filter screens, so that impurities in the glue solution can be filtered, and the purity of the glue solution is ensured. The filter screen 18 is made of stainless steel, and filter screens with different meshes and layers can be selected according to field requirements, so that the optimal filtering effect is achieved. The joint outer shell 17 and the inner sleeve 19 are screwed together by threads, so that the convenience in disassembly is ensured, and the sealing effect is also considered.
In conclusion: the utility model provides a sealed effect of whole hot melt adhesive spray gun can satisfy needle valve core high-frequency vibration's operation requirement. Secondly, the utility model discloses a lead cover 13 and can play better guide effect to needle valve core 10 when guaranteeing not to influence the glue solution and pass through, promoted the concentricity between needle valve core 10 and the valve body passageway, and then promoted and beaten the precision of gluing.
The glue inlet channel is also provided with a filtering device, so that impurities in the glue solution can be filtered, the purity of the glue solution is ensured, and the strength and the heat resistance are ensured.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The hot melt adhesive spray gun comprises a valve body (8) and a needle valve core (10) arranged in the valve body (8), wherein the needle valve core (10) can axially move relative to the valve body (8), the needle valve core (10) is provided with a piston (3), the valve body (8) is connected with the piston (3) through a piston cavity (81), and the valve body (8) is also provided with a glue inlet cavity (82) communicated with a glue inlet channel;
the device is characterized in that the outer edge of the piston (3) is connected with a piston cavity (81) through an X-shaped rubber sealing ring (4);
the upper end and the lower end of the glue inlet cavity (82) are respectively connected with the valve body (8) through a sealing component (5) sleeved on the needle valve core (10) and a guide sleeve (13) sleeved on the needle valve core (10);
the lower end of the piston cavity (81) is also provided with a sealing component (5) sleeved on the needle valve core (10).
2. The hot melt adhesive spray gun of claim 1, wherein the seal assembly (5) comprises a flooding plug seal (6) and a flat gasket (7), the flooding plug seal (6) and the flat gasket (7) are both sleeved on the needle valve core (10), and the flat gasket (7) is located at the cavity end.
3. The hot melt adhesive spray gun according to claim 2, wherein a positioning spring (9) sleeved on the needle valve core (10) is further provided between the guide sleeve (13) and the flat gasket (7).
4. A hot melt adhesive spray gun as recited in claim 1, wherein said adhesive inlet passageway is further provided with a removable filter assembly.
5. A hot melt adhesive spray gun according to claim 4, wherein said filter means comprises a joint housing (17), a filter screen (18), and an inner sleeve (19), said inner sleeve (19) detachably mounting the filter screen (18) inside the joint housing (17), and the filter screen (18) being disposed between the inner sleeve (19) and the joint housing (17), said joint housing (17) being detachably mounted to the valve body (8).
6. A hot melt adhesive spray gun as recited in claim 5, wherein the adapter housing (17) is laterally provided with side openings (171), and the inner sleeve (19) is laterally provided with side through holes (191) corresponding in position to the side openings (171).
7. The hot melt adhesive spray gun of claim 5 or 6, wherein said screen (18) comprises three layers of 150 mesh metal screen.
8. A hot melt adhesive spray gun as recited in claim 1, wherein said guide sleeve (13) is triangular in cross-section.
9. The hot melt adhesive spray gun according to claim 1, characterized in that the adhesive outlet end of the valve body (8) is further provided with a straight nozzle (14), said straight nozzle (14) being detachably connected to the valve body (8) by means of a nozzle lock nut (20).
10. The hot melt adhesive spray gun according to claim 1, wherein said piston (3) is further provided with a shut-off valve spring (12) for actuating the needle valve cartridge (10) toward the closing means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222176952.1U CN218502543U (en) | 2022-08-17 | 2022-08-17 | Hot melt adhesive spray gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222176952.1U CN218502543U (en) | 2022-08-17 | 2022-08-17 | Hot melt adhesive spray gun |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218502543U true CN218502543U (en) | 2023-02-21 |
Family
ID=85209262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222176952.1U Active CN218502543U (en) | 2022-08-17 | 2022-08-17 | Hot melt adhesive spray gun |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218502543U (en) |
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2022
- 2022-08-17 CN CN202222176952.1U patent/CN218502543U/en active Active
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