CN219400828U - Heating head and hot melt adhesive gun - Google Patents
Heating head and hot melt adhesive gun Download PDFInfo
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- CN219400828U CN219400828U CN202320469058.5U CN202320469058U CN219400828U CN 219400828 U CN219400828 U CN 219400828U CN 202320469058 U CN202320469058 U CN 202320469058U CN 219400828 U CN219400828 U CN 219400828U
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- heating
- heating head
- glue
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- melt adhesive
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Abstract
The utility model discloses a heating head and a hot melt adhesive gun, wherein the heating head comprises a heating head main body and a heating piece, the heating head main body comprises a first end and a second end, a melt adhesive cavity is arranged in the heating head main body, a mounting groove which is sunken towards the inside of the melt adhesive cavity is arranged in the middle area of the first end of the heating head main body, and a glue outlet nozzle communicated with the melt adhesive cavity is arranged at the first end of the heating head main body; the heating piece is arranged in the mounting groove and is used for heating and melting the glue stick in the glue melting cavity. The heating head and the hot melt adhesive gun are simplified in structure, and the heating part is heated by changing the position of the heating part, so that the heating part radiates from the center inside the heating head main body to the periphery, the adhesive outlet time can be effectively shortened, and the heat utilization efficiency is improved.
Description
Technical Field
The utility model relates to the field of hot melt adhesive guns, in particular to a heating head and a hot melt adhesive gun.
Background
At present, the heating head structure of the existing hot melt adhesive gun is mainly composed of a heating tube main body, a heating element (PTC or MCH heating sheet or heating rod) and other auxiliary mechanisms.
Fig. 4a is a sectional view of a heating head of a conventional hot melt adhesive gun, which mainly comprises a heating head main body 1 made of aluminum alloy, a rectangular heating sheet 6 and a reed 7, wherein the reed 7 fixedly attaches the heating sheet 6 to the heating head main body 1, and the heating sheet 6 is electrified to heat the heating head main body 1 to melt an adhesive rod. Because the heating sheet 6 with the structure heats outside the heating head main body 1, the defects of large heat loss, uneven heating, long heating time, slow glue discharge and the like exist.
Fig. 4b is a cross-sectional view of another conventional hot melt adhesive gun heating head, which mainly comprises an aluminum alloy glue outlet nozzle 15, an aluminum alloy heating head main body 1 and an annular heating plate 6 with an outer diameter of 14mm and an inner diameter of 7mm, wherein the glue outlet nozzle 15 and the heating head main body 1 clamp the heating plate 6 in the middle through threaded connection, and the heating plate 5 heats the heating head main body 1 and the glue outlet nozzle 15 to melt an adhesive rod after being electrified. The heating surface in the structure is mainly an annular surface, but the heating surface of the heating sheet 6 cannot directly heat the glue rod because the common size diameter of the glue rod is 7mm, and the glue rod needs to be conducted and heated through the heating head main body 1 of aluminum alloy, so that the defects of high heat loss, long heating time, slow glue discharging and the like are also caused.
Fig. 4c is a cross-sectional view of a conventional hot melt adhesive gun heating head, which mainly comprises an aluminum alloy heating head main body 1, an aluminum alloy heating rod sleeve 8, and a heating rod 9 with a diameter of 3mm, wherein the heating rod sleeve 8 and the heating head main body 1 are connected through threads, and the heating rod 9 is inserted into the heating rod sleeve 8 and heats the heating head main body 1 to melt the adhesive rod after being electrified. In the structure, the heating rod 9 penetrates through the heating head main body 1, and is in a protruding structure at two ends in the appearance shape, so that the phenomena of larger heat loss and more serious temperature rise and heating of the glue gun shell exist due to oversized size.
For this reason, the heating head structure of the existing hot melt adhesive gun still needs to be improved.
Disclosure of Invention
The utility model aims to provide a heating head and a hot melt adhesive gun, which are used for accelerating the melting of an adhesive rod and reducing heating loss.
The utility model adopts the following technical scheme:
a heating tip comprising:
the heating head comprises a heating head main body, wherein the heating head main body comprises a first end and a second end, a melt adhesive cavity is formed in the heating head main body, a mounting groove which is sunken towards the inside of the melt adhesive cavity is formed in the middle area of the first end of the heating head main body, and a glue outlet nozzle communicated with the melt adhesive cavity is formed in the first end of the heating head main body;
the heating piece is arranged in the mounting groove and is used for heating and melting the glue rod in the glue melting cavity.
In an alternative scheme, the inner wall of the first end of the heating head main body is an inclined surface, and the inclined surface is used for guiding the molten glue solution to flow to the glue outlet nozzle or guiding the molten glue solution to flow back into the glue melting cavity.
According to the scheme, the solution in the melt adhesive cavity can be more rapidly converged at the adhesive outlet nozzle by utilizing the guiding effect of the inclined plane, so that the adhesive outlet speed and smoothness are improved; and when in standby, the inclined plane can guide the glue solution to flow back to the glue melting cavity so as to avoid the glue overflow phenomenon of the glue outlet nozzle.
In an alternative, the slope of the inclined plane is 15-45 degrees, and the guiding effect of the inclined plane in the range of the slope is better.
In an alternative scheme, the outer surface of the mounting groove at one end of the melt adhesive cavity is in a conical or cutting edge structure, and the mounting groove is coaxial or eccentric with the central line of the melt adhesive cavity.
According to the scheme, the head of the glue stick can be abutted against the end part of the conical or cutting edge structure of the mounting groove, and the end part of the conical structure is matched with the heated end part, so that the glue stick can be broken, the glue stick can be divided into multiple parts to be spread all around, and the glue melting efficiency is accelerated.
In an alternative scheme, the mounting groove, the glue outlet nozzle and the heating head main body are integrally formed, and the heating head main body is made of a heat conducting material.
Above-mentioned scheme integrated into one piece design is convenient to generate heat the production processing of head main part, selects the heat conduction material to make the head main part that generates heat to be favorable to the heat transfer of heating member to melt the glue stick, also makes the head main part itself obtain certain temperature simultaneously, avoids the glue solution solidification to influence out the smoothness nature of glue.
In an alternative scheme, the heating element is wholly or partially inserted in the mounting groove and detachably connected with the mounting groove, so that the heating element with faults can be conveniently dismounted, and the use cost of the heating head is reduced.
In an alternative scheme, the heating element is an MCH metal ceramic rod, and the heating element is connected with a wire, so that the heating element can heat and melt the glue rod in the melt glue cavity after being electrified.
The MCH metal ceramic rod in the scheme has the advantages of good surface insulation performance, quick temperature rise, flexible and controllable temperature range, good heat uniformity, long service life and the like, and can better realize the melt adhesive effect in the heating head structure.
In an alternative scheme, the heating head further comprises a rubber guiding pipe and a fixing spring, and the rubber guiding pipe is detachably connected with the second end of the heating head main body through the fixing spring, so that the rubber guiding pipe is convenient to disassemble and assemble, and the melting rubber cavity and/or the rubber rod cavity are cleaned. The inside of rubber guiding tube is provided with the excellent chamber of gluing that is used for holding the stick, excellent chamber of gluing with the viscose chamber intercommunication.
In an alternative scheme, the surface of the heating head main body and/or the surface of the rubber guide tube is provided with a heat-resistant layer.
The high-temperature scalding accident caused by human-computer contact can be avoided in the scheme, and the use safety is improved.
A hot melt adhesive gun comprises the heating head.
Compared with the prior art, the utility model has the beneficial effects that at least: the heating head and the hot melt adhesive gun are simplified in structure, and the heating part is heated by changing the position of the heating part, so that the heating part radiates from the center inside the heating head main body to the periphery, the adhesive outlet time can be effectively shortened, and the heat utilization efficiency is improved.
Drawings
Fig. 1 is a schematic diagram of a heating head according to an embodiment of the present utility model.
Fig. 2 is an exploded view of a heating tip according to an embodiment of the present utility model.
Fig. 3 is a cross-sectional view of a heating tip according to an embodiment of the present utility model.
Fig. 4a-4c are cross-sectional views of the heating tips of the prior 3 hot melt adhesive guns.
In the figure: 1. the heating head comprises a heating head main body 11, a first end 12, a second end 13, a glue melting cavity 14, a mounting groove 15, a glue outlet nozzle 2, a heating piece 3, a wire 4, a glue guiding pipe 41, a glue rod cavity 5, a fixed spring 6, a heating piece 7, a reed 8, a heating rod sleeve 9 and a heating rod.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus a repetitive description thereof will be omitted.
The words expressing the positions and directions described in the present utility model are described by taking the drawings as an example, but can be changed according to the needs, and all the changes are included in the protection scope of the present utility model.
Referring to fig. 1 to 3, the present utility model provides a heating head including a head main body 1 and a heat generating member 2.
The heating head main body 1 is approximately cylindrical in shape, and a glue melting cavity 13 is arranged in the heating head main body 1, the glue melting cavity 13 is used for accommodating a part of glue sticks, collecting melted glue solution and continuously heating and preserving the glue solution, and the glue sticks are melted into the glue solution in the glue melting cavity 13. The heating head main body 1 comprises a first end 11 and a second end 12, specifically, the first end 11 and the second end 12 are two ends of the heating head main body 1 along the self axis direction respectively, wherein the first end 11 of the heating head main body 1 is in a closed state except for a glue outlet nozzle 15, a mounting groove 14 which is sunken towards the inside of a glue melting cavity 13 is arranged in the middle area of the first end 11 of the heating head main body 1, the mounting groove 14 is used for mounting a heating element, the shape of the mounting groove 14 can be a sheet shape, a ring shape, a rod shape and the like so as to facilitate the dismounting of the heating element, the mounting groove 14 can be in a non-detachable form after being fixed with the heating element, and the limitation is not made, in addition, the glue outlet nozzle 15 which is communicated with the glue melting cavity 13 is also arranged at the first end 11 of the heating head main body 1 so that glue can smoothly flow out from the inside of the glue melting cavity 13; the second end 12 of the heat generating head body 1 is in an open condition for receiving a glue stick (not shown) from a hot melt glue gun input.
The heating element 2 is arranged in the mounting groove 14, the heating element 2 can be elements such as a PTC (positive temperature coefficient) or MCH (negative temperature coefficient) heating sheet or an electric heating rod, the heating element 2 is used for heating and melting the glue rod in the glue melting cavity 13, the temperature of the area is highest because the heating element 2 is positioned in the middle area of the glue melting cavity 13, the glue rod can be rapidly melted, and the glue liquid after the glue rod is melted can wrap the outer wall of the mounting groove 14 because the heat is radiated from the center in the heating head main body 1, so that the heat of the heating element 2 can be fully conducted to the glue liquid and the glue rod, the heat loss can be reduced to the minimum, the heat utilization efficiency is improved, the glue melting speed and the glue outlet speed are higher, and meanwhile, the shell temperature of the hot melt glue gun can be ensured to be relatively low.
Overall, the heating head of this application has simplified structure, through the position that changes heating piece 2, can shorten out the gluey time to heat utilization efficiency has been improved.
Referring to fig. 3, the inner wall of the first end 11 of the heating head main body 1 is an inclined plane, and the inclined plane is used for guiding the melted glue solution to flow to the glue outlet nozzle 15 or guiding the melted glue solution to flow back into the glue outlet cavity 13, specifically, in the process of glue pushing operation, the glue outlet nozzle 15 faces downwards, and the solution in the glue outlet cavity 13 can be more quickly converged at the glue outlet nozzle 15 by using the guiding action of the inclined plane, so that the glue outlet speed and smoothness are improved; when the heating head main body 1 is horizontally placed and the glue outlet nozzle 15 is positioned above the heating head main body in standby, the inclined plane can guide glue solution to flow back to the glue melting cavity 13 again, so that the glue overflow phenomenon of the glue outlet nozzle 15 is avoided.
The surface of the inclined plane is smooth, so that the adhesion of glue solution is reduced, the smoothness of glue solution flow is improved, the inclined plane can be obtained by adopting a mechanical polishing or chemical plating mode, the gradient of the inclined plane is 15-45 degrees, the guiding effect of the inclined plane in the gradient range is good, and further, the gradient of the inclined plane is 30 degrees.
In a preferred embodiment, the outer surface of the mounting groove 14 at one end of the melt adhesive cavity 13 is in a conical structure, the mounting groove 14 and the center line of the melt adhesive cavity 13 are coaxially arranged (or can be eccentrically arranged), so that the head of the adhesive rod can lean against the conical end of the mounting groove 14, the end of the conical structure is matched with the heated end to facilitate breaking of the adhesive rod, the adhesive rod is divided into multiple parts to be spread all around, the multiple parts of adhesive rod is wrapped outside the mounting groove 14, the adhesive rod is fully contacted with the outer wall of the mounting groove 14, the heat conduction effect is better, and the adhesive efficiency is accelerated. In some other embodiments, the outer surface of the mounting groove 14 at one end of the melt adhesive cavity 13 may be a cutting edge structure, which can also help break the adhesive rod when the adhesive rod is contacted with the heated adhesive rod, so that the adhesive rod is spread in multiple parts to the periphery, and the adhesive rod is fully contacted with the mounting groove 14, so as to realize the function of rapid thermal heating.
Referring to fig. 1 to 3, the mounting groove 14, the glue outlet nozzle 15 and the heating head main body 1 are integrally formed, so that the heating head main body 1 has the advantages of convenient processing and high structural strength, and adopts a heat conducting material, such as aluminum alloy, copper and the like, which is suitable for processing, so as to facilitate the heat transfer of a heating element to melt a glue stick, and meanwhile, the heating head main body 1 itself obtains a certain temperature, thereby avoiding the glue solution solidification from affecting the smoothness of glue outlet.
As shown in fig. 2 and 3, the heating element 2 is wholly or partially inserted in the mounting groove 14 and detachably connected with the mounting groove 14, so that the failed heating element 2 can be conveniently dismounted, and the use cost of the heating head is reduced. As an example, the heating element 2 and the mounting groove 14 may be assembled by interference fit, or the heating element 2 is provided with external threads, and the mounting groove 14 is provided with mating internal threads, so that the heating element 2 is in threaded connection with the mounting groove 14.
In a specific embodiment, the heating element 2 is an MCH metal ceramic rod, and the MCH metal ceramic rod has the advantages of good surface insulation performance, rapid temperature rise, flexible and controllable temperature range, good heat uniformity, long service life and the like, and can better realize the melt adhesive effect in the heating head structure of the application. The heating element 2 is connected with a wire 3, the wire 3 can be electrically connected to a power supply device of the hot melt adhesive gun, so that the heating element 2 can heat and melt an adhesive rod in the melt adhesive cavity 13 after being electrified, preferably, a wear-resistant layer and/or a waterproof layer (not shown) are arranged at the joint of the wire 3 and the heating element 2, so as to protect the joint and improve the service life and/or safety of the heating head structure, and the wear-resistant layer and/or the waterproof layer can be a rubber layer as an example.
Referring to fig. 1 to 3, the heating head further includes a rubber guiding tube 4 and a fixing spring 5, the rubber guiding tube 4 is detachably connected with the second end 12 of the heating head main body 1 through the fixing spring 5, specifically, the rubber guiding tube 4 is generally made of rubber, and the rubber guiding tube 4 can prevent the rubber rod from retreating after the rubber rod is inserted into the rubber guiding tube 4, so that smooth rubber feeding operation is ensured. When the device is installed, one end of the rubber guiding pipe 4 is sleeved on the second end 12 of the heating head main body 1, the fixing spring 5 is wound on the periphery of the rubber guiding pipe 4 to lock the rubber guiding pipe, and the detachable connection mode is convenient for cleaning residual solidified rubber in the melt adhesive cavity 13 and/or the rubber rod cavity 41, so that the influence on the subsequent use of the heating head is avoided. In some other embodiments, the rubber guiding tube 4 may also be made of a heat conducting material, such as aluminum alloy, copper, etc., and the rubber guiding tube 4 and the heating head main body 1 may be fixed by adopting a threaded connection manner, so that after the rubber guiding tube 4 is connected with the heating head main body 1, part of heat is transferred to the rubber guiding tube 4, so that the temperature of the rubber guiding tube 4 is raised, thereby preheating the rubber rod and further improving the efficiency of the melt adhesive.
Further, a heat-resistant layer (not shown) is arranged on the surface of the heating head main body 1 and/or the surface of the rubber guide tube 4, and the heat-resistant layer can avoid high-temperature scalding accidents caused by human-computer contact and improve the safety during use. As an example, the heat-resistant layer may be a layered structure made of one or more of heat-insulating and heat-resistant materials such as glass fiber, asbestos, polyurethane foam, and the like.
The utility model also provides a hot melt adhesive gun which comprises the heating head, and has the advantages of high adhesive outlet speed and high heat utilization efficiency, and the structure of the hot melt adhesive gun except the heating head can adopt the known technology and is not repeated here.
While embodiments of the present utility model have been shown and described, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that changes, modifications, substitutions and alterations may be made therein by those of ordinary skill in the art without departing from the spirit and scope of the utility model, all such changes being within the scope of the appended claims.
Claims (10)
1. A heating tip, comprising:
the heating head comprises a heating head main body, wherein the heating head main body comprises a first end and a second end, a melt adhesive cavity is formed in the heating head main body, a mounting groove which is sunken towards the inside of the melt adhesive cavity is formed in the middle area of the first end of the heating head main body, and a glue outlet nozzle communicated with the melt adhesive cavity is formed in the first end of the heating head main body;
the heating piece is arranged in the mounting groove and is used for heating and melting the glue rod in the glue melting cavity.
2. The heating applicator of claim 1, wherein the inner wall of the first end of the applicator body is beveled for directing the flow of molten glue to the nozzle or for directing the backflow of molten glue into the melt adhesive cavity.
3. A heating tip as claimed in claim 2, wherein the slope of the ramp is 15-45 °.
4. A heating tip according to any one of claims 1 to 3, wherein the outer surface of the end of the mounting groove located inside the melt adhesive cavity is of a tapered or cutting edge configuration, and the mounting groove is disposed coaxially or eccentrically with respect to the center line of the melt adhesive cavity.
5. The heating head of claim 1, wherein the mounting groove, the glue outlet and the heating head body are integrally formed, and the heating head body is made of a heat conducting material.
6. The heating tip of claim 1, wherein the heat generating member is wholly or partially inserted into the mounting groove and detachably connected thereto.
7. The heating head of claim 6, wherein the heating element is an MCH cermet rod, and the heating element is connected with a wire, so that the heating element can heat and melt the glue rod in the glue melting cavity after being electrified.
8. The heating head of claim 1, further comprising a rubber guiding tube and a fixing spring, wherein the rubber guiding tube is detachably connected with the second end of the heating head main body through the fixing spring, a rubber rod cavity for accommodating a rubber rod is arranged in the rubber guiding tube, and the rubber rod cavity is communicated with the melt adhesive cavity.
9. The heating tip of claim 8, wherein a surface of the tip body and/or a surface of the rubber guide tube is provided with a heat-resistant layer.
10. A hot melt adhesive gun comprising a heating tip according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320469058.5U CN219400828U (en) | 2023-03-13 | 2023-03-13 | Heating head and hot melt adhesive gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320469058.5U CN219400828U (en) | 2023-03-13 | 2023-03-13 | Heating head and hot melt adhesive gun |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219400828U true CN219400828U (en) | 2023-07-25 |
Family
ID=87230581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320469058.5U Active CN219400828U (en) | 2023-03-13 | 2023-03-13 | Heating head and hot melt adhesive gun |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219400828U (en) |
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2023
- 2023-03-13 CN CN202320469058.5U patent/CN219400828U/en active Active
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