Heating structure of non-cylindrical hot nozzle

Abstract

The utility model discloses a heating structure of a non-cylindrical hot nozzle, which comprises a nozzle body, a nozzle tip and a shell sleeved on the outer sides of the nozzle body and the nozzle tip, the nozzle body and the shell are provided with matched receding grooves which are recessed inwards, the nozzle body is provided with a middle cavity which vertically penetrates through the nozzle body, the nozzle tip is arranged at the lower end of the nozzle body and is communicated with the middle cavity, and the nozzle tip is arranged in the middle cavity. The outer side wall of the nozzle body is wrapped with a heating wire, and a heat conduction rod extending to the side of the receding groove and the side of the lower portion of the middle cavity is arranged on the side wall of the nozzle body from top to bottom. By arranging the heat conduction rod extending to the side of the lower part of the middle cavity, heat preservation can be performed on molten materials at the lower part of the middle cavity, so that the flowability of the molten materials is ensured, and the injection molding quality is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of injection hot nozzles, in particular to a heating structure of a non-cylindrical hot nozzle. Background Art

[0002] With the development of the industry, in order to save costs, many products on the market currently choose to directly punch the product surface. Some products have a more complex structure, and directly punching the product surface has higher requirements for the hot runner (hot nozzle).

[0003] As attached Figure 5 As shown, product 100 (mobile phone charger power plug) is composed of a plug 101 and a shell 102. Based on the above processing requirements, it is necessary to directly injection mold the shell 102 on a pair of plugs 101, and the position of the injection molding gate is located between the pair of plugs 101. If a conventional cylindrical hot nozzle is used, the following three situations may occur: 1. The hot nozzle occupies a large space laterally and cannot be inserted between a pair of plugs for normal injection molding; 2. To compress the lateral space of the hot nozzle, it is necessary to compress the nozzle body and / or the hot runner of the molten material, which may affect the flow effect of the material and the injection molding requirements on the one hand, and on the other hand, the hot nozzle needs to be redesigned and manufactured, increasing the cost; 3. If only the lateral space at the bottom of the hot nozzle is compressed, it may not be possible to arrange the heating wire at this position, which affects the fluidity of the molten material.

[0004] Based on the above-mentioned problems, it is necessary to design a hot nozzle for normal injection molding of the above-mentioned products (which can be inserted into a narrow gap). Utility Model Content

[0005] The utility model aims to provide a heating structure of a non-cylindrical hot nozzle, which can insulate the molten material in the lower part of the middle cavity by arranging a heat-conducting rod extending to the lower side of the middle cavity, thereby ensuring the fluidity of the molten material and the injection molding quality.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a heating structure of a non-cylindrical hot nozzle, comprising a nozzle body, a nozzle tip, and a shell sleeved on the outside of the two, the nozzle body and the shell have matching and inwardly recessed give-way grooves, the nozzle body is provided with a middle cavity vertically penetrating its body, the nozzle tip is arranged at the lower end of the nozzle body and communicated with the middle cavity, the outer wall of the nozzle body is wrapped with a heating wire, and the side wall of the nozzle body is provided with a heat-conducting rod extending from top to bottom to the side of the give-way groove and the side of the lower part of the middle cavity.

[0007] As a further optimization, a plug hole is provided on the side wall of the nozzle body, and the heat conducting rod is installed in the plug hole, and the plug hole can limit the position of the heat conducting rod.

[0008] As a further optimization, the insertion hole is not communicated with the outer side wall of the mouthpiece body.

[0009] As a further optimization, the upper end of the heat-conducting rod is connected to a heating rod, and at least the lower portion of the heating rod is embedded in the socket, so that direct heat transfer to the heat-conducting rod can be achieved through the heating rod.

[0010] As a further optimization, a positioning bevel is provided on the side of the lower part of the socket away from the middle cavity, and a guide bevel matching the positioning bevel is provided on the lower end of the heat conductive rod. The guide bevel abuts against the positioning bevel to abut one side of the heat conductive rod against the inner wall of the socket close to the middle cavity, thereby preventing the heat conductive rod from rotating in the socket.

[0011] As a further optimization, the gap of the heat conducting rod is set in the socket to facilitate the installation of the heat conducting rod in the socket. In addition, a heat conducting glue can be set between the two to fix the position between the two.

[0012] As a further optimization, the lower end surface of the heat conducting rod is flush with the lower end surface of the middle cavity, which can ensure that the entire middle cavity has a better thermal insulation effect.

[0013] As a further optimization, the horizontal cross-section of the heat-conducting rod is square, which has a larger (contact) area on the side closer to the central cavity than the circular one, which is beneficial to improving the uniform heating and heat preservation effect.

[0014] As a further optimization, the number of the heat conducting rods is two to four. The utility model preferably uses two heat conducting rods, which are set according to actual product needs.

[0015] As a further optimization, the heating wire and / or the heat conducting rod are made of copper, which has a more excellent heat transfer performance.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. By providing a heat-conducting rod extending to the lower side of the middle cavity, the molten material in the lower part of the middle cavity can be kept warm, thereby ensuring the fluidity of the molten material and the quality of injection molding.

[0018] 2. The heating rod is provided to directly transfer heat to the heat conducting rod, so that the molten material in the center cavity has a better heating and heat preservation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the utility model.

[0020] Figure 2 It is a partial cross-sectional view of the utility model having a heat conducting rod.

[0021] Figure 3 It is a cross-sectional view of the utility model.

[0022] Figure 4 It is an application schematic diagram of the utility model.

[0023] Figure 5 This is a schematic diagram of the product structure. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0025] like Figures 1 to 4 As shown, a heating structure of a non-cylindrical hot nozzle comprises a nozzle body 1, a nozzle tip 2, and a shell 4 sleeved on the outside of the two, the nozzle body 1 and the shell 4 are provided with matching and inwardly recessed paving grooves 40, the nozzle body 1 is provided with a middle cavity 10 vertically penetrating the main body thereof, the nozzle tip 2 is arranged at the lower end of the nozzle body 1 and communicated with the middle cavity 10, a copper heating wire 31 is wrapped on the outer wall of the nozzle body 1, and a copper heat conducting rod 32 extending to the side of the paving groove 40 and the side of the lower part of the middle cavity 10 is arranged on the side wall of the nozzle body 1 from top to bottom.

[0026] Combination Figure 5 As shown, because it is necessary to directly injection mold the shell 102 on a pair of inserts 101, and in actual working conditions, if the position of the injection gate 1020 is located between the pair of inserts 101, the hot nozzle needs to extend between the pair of inserts 101. In order to ensure that the molten material flows smoothly in the middle cavity 10, the space occupied by the middle cavity 10 cannot be squeezed, and the overall structure of the hot nozzle cannot be compressed in space. Therefore, by setting a clearance groove 40 for making way for the insert 101 on the nozzle body 1 and the shell 4, it is ensured that when the hot nozzle reaches the specified position, the insert 101 is located in the clearance groove 40, and the nozzle tip 2 is not affected. Located at the correct injection gate position. Due to the existence of the clearance groove 40, the heating wire 31 cannot heat and keep warm the molten material at the bottom of the middle cavity 10. Therefore, by setting a heat-conducting rod 32 extending to the side of the lower part of the middle cavity 10, heat can be collected to heat and keep warm the molten material at the bottom of the middle cavity 10, ensuring the fluidity of the molten material, thereby ensuring the injection quality. The heat source for the lower part of the heat-conducting rod 32 to keep the molten material in the lower part of the central cavity 10 warm can come from the heat that is transferred from the nozzle body 1 to the upper part of the heat-conducting rod 32 through the heating wire 31 and then to the lower part of the heat-conducting rod 32. The heat transfer from the heating wire 31 to the heat-conducting rod 32 and the lower part of the heat-conducting rod 32 is achieved through heat conduction.

[0027] Furthermore, a socket 11 is provided on the side wall of the nozzle body 1, and the heat conducting rod 32 is installed in the socket 11. On the one hand, the position of the make way groove 40 can be avoided, and on the other hand, the installation stability of the heat conducting rod 32 is ensured. On the other hand, the heat conducting rod 32 can be arranged to abut against the side wall of the socket 11 with as large an area as possible, so that the heat transferred from the heating wire 31 to the nozzle body 1 can be evenly and quickly transferred to the upper part of the heat conducting rod 32 and to the lower part of the heat conducting rod 32.

[0028] The insertion hole 11 is not connected to the outer wall of the nozzle body 1, that is, the insertion hole 11 is a horizontal closed space. It is arranged as close to the middle cavity 10 as possible to achieve faster heat transfer to the lower part of the heat conducting rod 32.

[0029] In another embodiment of the present invention, the upper end of the heat-conducting rod 32 is connected to a heating rod 33, and at least the lower portion of the heating rod 33 is embedded in the socket 11. This embodiment directly transfers heat to the heat-conducting rod 32 through the heating rod 33, replacing the heating wire 31 transferring heat to the heat-conducting rod 32 through the nozzle body 1, thereby having a better heating and heat preservation effect.

[0030] In another embodiment of the utility model, a positioning bevel (not shown) is provided on the side of the lower part of the socket 11 away from the middle cavity 10, and a guide bevel (not shown) matching the positioning bevel is provided on the lower end of the heat conducting rod 32. The guide bevel abuts against the positioning bevel to abut one side of the heat conducting rod against the inner wall of the socket 11 close to the middle cavity 10. On the one hand, precise positioning of the heat conducting rod 32 is achieved to prevent it from rotating in the socket. On the other hand, the abutment between the heat conducting rod and the side of the socket 11 close to the middle cavity 10 can realize rapid inward transfer of heat, thereby improving the heat transfer effect.

[0031] The lower end surface of the heat conducting rod 32 is flush with the lower end surface of the middle cavity 10 , which can effectively achieve heating and heat preservation of the molten material in the entire middle cavity 10 .

[0032] The horizontal cross-section of the heat conducting rod 32 can be selected to be square, elliptical, etc. on the basis of the conventional circular shape, so that the side close to the middle cavity 10 can have a larger contact surface, which can achieve a uniform heating effect to a certain extent.

[0033] In the utility model, no matter the heat conducting rod 32 obtains heat through the heating wire 31 or obtains heat through the heating rod 33, the obtained heat is finally transferred on the main body and to its lower part, so as to optimize and improve the situation that the heating wire 31 cannot be set to extend to the side of the lower part of the middle cavity 10 due to the appearance of the give way groove 40.

[0034] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A heating structure of a non-cylindrical hot nozzle, characterized in that: The invention comprises a nozzle body, a nozzle tip, and a shell sleeved on the outside of the two, wherein the nozzle body and the shell are provided with matching and inwardly recessed paving grooves, the nozzle body is provided with a middle cavity vertically penetrating the main body, the nozzle tip is arranged at the lower end of the nozzle body and communicated with the middle cavity, a heating wire is wrapped on the outer wall of the nozzle body, and a heat conducting rod extending from top to bottom to the side of the paving groove and the side of the lower part of the middle cavity is provided on the side wall of the nozzle body.

2. The heating structure of the non-cylindrical hot nozzle according to claim 1, characterized in that: A plug hole is arranged on the side wall of the nozzle body, and the heat conducting rod is installed in the plug hole.

3. The heating structure of the non-cylindrical hot nozzle according to claim 2, characterized in that: The insertion hole is not communicated with the outer side wall of the mouthpiece body.

4. The heating structure of the non-cylindrical hot nozzle according to claim 2, characterized in that: The upper end of the heat conducting rod is connected to a heating rod, and at least the lower part of the heating rod is embedded in the insertion hole.

5. The heating structure of the non-cylindrical hot nozzle according to claim 2, 3 or 4, characterized in that: A positioning slope is provided on the side of the lower part of the socket away from the middle cavity, and a guiding slope matching the positioning slope is provided on the lower end of the heat conducting rod. The guiding slope abuts against the positioning slope to abut one side of the heat conducting rod against the inner wall of the socket close to the middle cavity.

6. The heating structure of the non-cylindrical hot nozzle according to claim 5, characterized in that: The heat conducting rod gap is arranged in the insertion hole.

7. The heating structure of the non-cylindrical hot nozzle according to claim 1, characterized in that: The lower end surface of the heat conducting rod is flush with the lower end surface of the middle cavity.

8. The heating structure of the non-cylindrical hot nozzle according to claim 1, characterized in that: The horizontal cross section of the heat conducting rod is a square.

9. The heating structure of the non-cylindrical hot nozzle according to claim 1, characterized in that: The number of the heat conducting rods is two to four.

10. The heating structure of the non-cylindrical hot nozzle according to claim 1, characterized in that: The heating wire and / or the heat conducting rod are made of copper.

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