CN220297698U - Automobile injection mold capable of being rapidly cooled and molded - Google Patents
Automobile injection mold capable of being rapidly cooled and molded Download PDFInfo
- Publication number
- CN220297698U CN220297698U CN202321807663.5U CN202321807663U CN220297698U CN 220297698 U CN220297698 U CN 220297698U CN 202321807663 U CN202321807663 U CN 202321807663U CN 220297698 U CN220297698 U CN 220297698U
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- Prior art keywords
- cooling
- cooling block
- die core
- core
- lower die
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- 238000002347 injection Methods 0.000 title claims abstract description 22
- 239000007924 injection Substances 0.000 title claims abstract description 22
- 238000001816 cooling Methods 0.000 claims abstract description 204
- 238000000465 moulding Methods 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 description 10
- 239000004033 plastic Substances 0.000 description 10
- 229920003023 plastic Polymers 0.000 description 10
- 238000001746 injection moulding Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The utility model discloses an automobile injection mold for rapid cooling molding, which relates to the technical field of automobile injection molds and comprises an upper mold core and a lower mold core which are sequentially arranged from top to bottom, wherein a mold cavity is formed between the upper mold core and the lower mold core, a plurality of cooling blocks are arranged on the lower mold core, cooling pipelines are arranged in the cooling blocks, cooling grooves which are respectively in one-to-one plug fit with the plurality of cooling blocks are formed in the lower end face of the upper mold core, the plurality of cooling blocks are respectively arranged along the edge of a molding cavity on the lower mold core, and the cooling grooves which are respectively in one-to-one plug fit with the plurality of cooling blocks and the edges of the molding cavity on the lower mold core are arranged on the upper mold core.
Description
Technical Field
The utility model relates to the technical field of automobile injection molds, in particular to an automobile injection mold capable of being rapidly cooled and molded.
Background
According to the chinese patent application No. CN201711482442.4, "most parts of an automobile are molded by injection molding, injection molding machines, i.e., injection molding machines and injection molding machines, are generally used, and the injection molding machines make thermoplastic plastics or thermosetting plastics into plastic automobile parts of various shapes by using plastic molding dies, so that the injection molding of the automobile parts is realized by the injection molding machines and the injection molding dies.
The existing injection mold comprises a female mold and a lower mold, wherein the female mold is a female mold, the lower mold is a male mold, when the female mold and the lower mold are clamped, a closed molding cavity is formed between the female mold and the lower mold, plastic melt is injected into the molding cavity, and after the plastic melt is naturally cooled and molded in the molding cavity, an automobile part with a specific shape can be manufactured, but the plastic melt is naturally cooled for too long, the molding efficiency of the part is affected, and meanwhile, the injection mold is occupied for a long time. In order to accelerate the cooling and forming of the plastic melt, the traditional mode is to pour cold water from the outside of the injection mold, cool the mold by the cold water, and cool the plastic melt by the mold. The heat dissipation mode is to dissipate heat from the outside, the heat transfer speed of the plastic melt is low, the molding efficiency of the plastic melt can be reduced, and a large amount of water can be wasted, so that the manufacturing cost is increased.
According to the development of the mold technology, the requirements on the aspect of rapid molding of the mold are higher and higher in industry, such as injection molds of products such as plastic articles in automobiles, air conditioner shells, dehumidifier shells and the like.
The injection mold of the plastic articles in the automobile room generally improves the cooling efficiency in the traditional quick injection mold through a cooling water flowing measure, the general cooling water flowing only sets the cooling flow passage inside the mold core, and transfers heat to the cooling flow passage by means of the heat conductivity of the mold, and the cooling flow passage takes away the heat by the cooling medium in the cooling flow passage, so that the purpose of cooling is achieved, but the heat conductivity of the mold is low, and the cooling flow passage is a linear cooling flow passage and has a small contact area with the mold core, so that a long time is needed in the process of conducting heat.
In summary, in the prior art, the method for cooling the molded automobile part is to pour cold water from the outside of the injection mold or increase cooling efficiency by cooling water running measures, but the solution in the prior art is to solve the above problems by the low cooling efficiency of the molded automobile part and the low production efficiency caused by the low heat conduction efficiency of the mold itself and the small contact area between the cooling runner and the core, so the utility model provides an injection mold structure capable of rapidly cooling the molded automobile part.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provides a technical scheme capable of solving the problems.
In order to achieve the above purpose, the present utility model provides the following technical solutions: an automobile injection mold for rapid cooling molding comprises an upper mold core and a lower mold core which are sequentially arranged from top to bottom;
the upper die core and the lower die core are provided with a forming part respectively on the opposite surfaces of the upper die core and the lower die core, and a die cavity is formed by the matching of the forming parts;
the lower die core is provided with a plurality of cooling blocks, and cooling pipelines are arranged in the cooling blocks;
the cooling block is arranged in a protruding way from the upper end surface of the lower die core to the upper die core;
cooling grooves which are respectively in one-to-one plug-in fit with a plurality of cooling blocks are formed in the lower end face of the upper die core;
the cooling blocks are respectively arranged along the edges of the forming cavity on the lower die core.
As a further scheme of the utility model: the cooling blocks comprise a first cooling block and a second cooling block which are symmetrically arranged at two sides of the lower die core, and a third cooling block and a fourth cooling block which are symmetrically arranged at two ends of the lower die core;
the cooling pipeline comprises a first input pipe embedded in the first cooling block and communicated with the first input pipe, a second input pipe embedded in the second cooling block and communicated with the second input pipe, a third input pipe embedded in the third cooling block and a third output pipe embedded in the fourth cooling block and a fourth input pipe and a fourth output pipe embedded in the fourth cooling block.
As a further scheme of the utility model: the first output pipes are symmetrically arranged on two sides of the first input pipe and are respectively communicated with the first input pipe;
the second output pipe is symmetrically arranged on two sides of the second input pipe and is respectively communicated with the second input pipe.
As a further scheme of the utility model: the upper die and the lower die are also included;
the upper die core and the lower die core are respectively embedded in the upper die and the lower die;
a positioning column is arranged on the upper end face of the lower die, and extends upwards from the upper end face of the lower die;
the positioning column extends upwards to exceed the upper end face of the cooling block, and the upper end of the positioning column is provided with a round corner part;
the positioning columns are provided with a plurality of positioning columns, and the positioning columns are respectively fixedly arranged on the lower die core and are close to the corner of the lower die core;
and the upper die is provided with positioning holes in one-to-one alignment, plugging and matching with the positioning columns.
As a further scheme of the utility model: the cooling pipeline is in an L-shaped structure, the L-shaped cooling pipeline comprises a vertical part which is vertically arranged and a transverse part which is transversely arranged, and a containing groove for containing the cooling pipeline is formed in the lower end face of the lower die;
the cooling block penetrates through the lower die and the lower die core in sequence, the vertical part of the cooling pipeline is embedded in the cooling block, the transverse part of the cooling pipeline extends outwards along the length direction of the accommodating groove, and the corner of the cooling pipeline is arranged in the accommodating groove.
As a further scheme of the utility model: the lower end face of the lower die core is provided with a bottom plate, the lower ends of the bottom plate and the cooling block are respectively provided with a U-shaped limiting part, and the U-shaped limiting parts on the bottom plate and the cooling block are in one-to-one alignment and matched with each other to form a fixing part for fixing the cooling pipeline.
Compared with the prior art, the utility model has the following beneficial effects: through be equipped with a plurality of cooling blocks on the lower mould benevolence, be equipped with on last mould benevolence with a plurality of cooling blocks one-to-one grafting complex cooling tank and through the edge of the shaping chamber on the lower mould benevolence with a plurality of cooling blocks respectively, can reduce the distance of cooling tube and die cavity to and can carry out the manifold heat transfer to the product in the die cavity, can effectually carry out quick cooling shaping with the auto parts, carry cooling efficiency by a wide margin and improve work efficiency and production efficiency.
Drawings
FIG. 1 is a perspective view of the structure of the present utility model;
FIG. 2 is an exploded perspective view of the structure of the present utility model;
FIG. 3 is an exploded perspective view of another construction of the present utility model;
FIG. 4 is an exploded perspective view of yet another construction of the present utility model;
FIG. 5 is a side view of the overall structure of the present utility model;
FIG. 6 is a schematic cross-sectional view taken along the direction A-A in FIG. 5;
FIG. 7 is a side view of another overall structure of the present utility model;
FIG. 8 is a schematic cross-sectional view taken along the direction B-B in FIG. 7;
reference numerals and names in the drawings are as follows:
an upper die-1, an upper die core-11, a cooling tank-12 and a positioning hole-13;
the mold comprises a lower mold 2, a lower mold core 21, a cooling block 22, a positioning column 23 and a round corner 24;
a first cooling block-3, a first input pipe-31, a first output pipe-32;
a second cooling block-4, a second input pipe-41, a second output pipe-42;
a third cooling block-5, a third input pipe-51, a third output pipe-52;
a fourth cooling block-6, a fourth input pipe-61, a fourth output pipe-62;
a cooling duct-7, a vertical portion-71, and a lateral portion-72;
a molding part-8, a mold cavity-81;
the bottom plate-9, the accommodating groove-91, the U-shaped limiting part-92 and the fixing part-93.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-8, a rapid cooling molding injection mold for an automobile comprises an upper mold core 11 and a lower mold core 21 which are sequentially arranged from top to bottom;
the opposite surfaces of the upper die core 11 and the lower die core 21 are respectively provided with a molding part 8, and the upper die core 11 and the lower die core 21 are provided with a die cavity 81 through the matching molding of the molding parts 8;
a plurality of cooling blocks 22 are arranged on the lower die core 21, and cooling pipelines 7 are arranged in the cooling blocks 22;
the cooling block 22 is arranged to protrude from the upper end surface of the lower die core 21 to the upper die core 11;
cooling grooves 12 which are respectively in one-to-one plug-in fit with a plurality of cooling blocks 22 are formed in the lower end face of the upper die core 11;
the plurality of cooling blocks 22 are respectively arranged along the edges of the molding cavity on the lower die core 21.
The cooling device comprises a plurality of cooling blocks 22, wherein the cooling blocks 22 are respectively arranged along the edges of a forming cavity on a lower die core 21, cooling pipelines 7 are respectively arranged in the cooling blocks 22, the cooling blocks 22 are respectively arranged protruding upwards from the upper end face of the lower die core 21 to the upper die core 11, the cooling grooves 12 are respectively in one-to-one inserting fit with the cooling blocks 22 on the lower end face of the upper die core 11, the cooling blocks 22 are respectively embedded in the cooling grooves 12 of the upper die core 11 during die assembly, when the die cavity 81 is filled with raw materials for waiting for cooling, when the continuous flow of liquid in the cooling pipelines 7 is carried out for heat transfer, the liquid is embedded in the cooling blocks 22 through the cooling pipelines 7, the cooling blocks 22 are respectively in inserting fit with the cooling grooves 12 of the upper die core 11, and the cooling blocks 22 are respectively in one-to-one inserting fit with the cooling grooves 12, the liquid can be respectively carried out multi-angle heat transfer with the upper die core 11 and the lower die core 21 during flow, the cooling blocks 22 are respectively arranged on the lower die core 21, the cooling channels 11 can be respectively provided with the cooling channels 11, the cooling efficiency can be effectively reduced, and the cooling efficiency can be respectively increased by one-to-one cooling channels can be respectively carried out along the cooling channels 21, and the cooling channels can be respectively cooled by one along the edges of the cooling channels 21, and the cooling channels can be respectively cooled by more than the cooling channels 81, and the cooling channels can be respectively, the cooling efficiency can be effectively reduced, and the cooling efficiency can be respectively.
In the embodiment of the present utility model, the cooling block 22 includes a first cooling block 3 and a second cooling block 4 symmetrically disposed at two sides of the lower mold core 21, and a third cooling block and a fourth cooling block 6 symmetrically disposed at two ends of the lower mold core 21;
the cooling pipe 7 includes a first input pipe 31 embedded in the first cooling block 3 and a first output pipe 32 communicated with the first input pipe 31, a second input pipe 41 embedded in the second cooling block 4 and a second output pipe 42 communicated with the second input pipe 41, a third input pipe 51 and a third output pipe 52 embedded in the third cooling block 5, and a fourth input pipe 61 and a fourth output pipe 62 embedded in the fourth cooling block 6.
When the liquid in the cooling pipe 7 flows to transfer heat to the cavity 81, the external liquid is respectively input into the first cooling block 3, the second cooling block 4, the third cooling block 5 and the fourth cooling block 6 from the first input pipe 31, the second input pipe 41, the third input pipe 51 and the fourth input pipe 61, and in the process, the liquid enters the first cooling block 3 from the first input pipe 31 to the first output pipe 32 and flows out from the first output pipe 32, so that the liquid can transfer heat with the first cooling block 3, the first cooling block 3 can be cooled, heat exchange can be performed with the upper die core 11 and the lower die core 21, the temperature of the upper die core 11 and the lower die core 21 is reduced, and the cooling speed of automobile parts is accelerated.
In the embodiment of the present utility model, the first output pipes 32 are symmetrically disposed on two sides of the first input pipe 31 and are respectively disposed in communication with the first input pipe 31;
the second output pipes 42 are symmetrically arranged at two sides of the second input pipe 41 and are respectively communicated with the second input pipe 41.
As shown in fig. 3, the lateral lengths of the first cooling block 3 and the second cooling block 4 are longer than the lateral lengths of the third cooling block 5 and the fourth cooling block 6, which results in that the heat transfer areas of the first cooling block 3 and the second cooling block 4 are larger than the areas of the third cooling block 5 and the fourth cooling block 6, so that the automobile parts are unevenly cooled and the temperatures of the first cooling block 3 and the second cooling block 4 are unstable, when the first input pipe 31 and the liquid in the first output pipe 32 quickly cool the first cooling block 3, the first cooling block 3 is unevenly cooled due to the overlarge heat transfer areas, the first output pipe 32 is symmetrically arranged at two sides of the first input pipe 31 and is communicated with the first input pipe 31, the temperature of the first cooling block 3 can be reduced by accelerating the flow rate of the liquid in the first input pipe 31, the liquid can be ensured to flow outwards through the first output pipe 32 after the cooling of the first cooling block 3 is completed, and the cooling efficiency can be further ensured.
In the embodiment of the utility model, the device also comprises an upper die 1 and a lower die 2;
the upper die core 11 and the lower die core 21 are respectively embedded in the upper die 1 and the lower die 2;
a positioning column 23 is arranged on the upper end surface of the lower die 2, and the positioning column 23 extends from the upper end surface of the lower die 2 to the direction of the upper die 1;
the positioning column 23 extends upwards to exceed the upper end face of the cooling block 22, and a round corner part 24 is arranged at the upper end of the positioning column 23;
the positioning columns 23 are provided with a plurality of positioning columns 23, and the positioning columns 23 are respectively fixedly arranged on the lower die core 21 and are close to the corner of the lower die core 21;
the upper die 1 is provided with positioning holes 13 which are in one-to-one alignment, inserting and matching with a plurality of positioning columns 23.
In the process of die assembly, the positioning column 23 extends upwards to exceed the upper end face of the cooling block 22, so that the positioning column 23 is in alignment and plug-in fit with the positioning hole 13 of the upper die 1 preferentially, and when the cooling block 22 is not in plug-in fit with the cooling groove 12, the upper die 1 and the lower die 2 are in alignment and fit in advance, so that the damage of the wrong plug-in connection of the cooling block 22 or the cooling groove 12 caused by inaccurate alignment of the cooling block 22 and the cooling groove 12 can be effectively avoided, and the service life of the die assembly can be effectively prolonged;
and the upper end of the positioning column 23 is provided with a round corner part 24, fine inaccurate alignment occurs when the positioning column 23 is spliced with the positioning hole 13, the round corner part 24 can be compatible with the situation, the abrasion rate of the positioning column 23 and the positioning hole 13 in the process of repeated die assembly and splicing is reduced, and the service life of the utility model is further prolonged.
In the embodiment of the utility model, the cooling pipeline 7 is in an L-shaped configuration, the L-shaped cooling pipeline 7 comprises a vertical portion 71 vertically arranged and a transverse portion 72 horizontally arranged, and a containing groove 91 for containing the cooling pipeline 7 is formed in the lower end surface of the lower die 2;
the cooling block 22 sequentially penetrates through the lower die 2 and the lower die core 21, the vertical portion 71 of the cooling pipeline 7 is embedded in the cooling block 22, the transverse portion 72 of the cooling pipeline 7 extends outwards along the length direction of the accommodating groove 91, and the corner of the cooling pipeline 7 is arranged in the accommodating groove 91.
In the embodiment of the utility model, the bottom plate 9 is disposed on the lower end surface of the lower mold core 21, the lower ends of the bottom plate 9 and the cooling block 22 are respectively provided with a U-shaped limiting portion 92, and the fixing portions 93 for fixing the cooling pipes 7 are formed by one-to-one alignment and matching of the bottom plate 9 and the U-shaped limiting portions 92 on the cooling block 22.
When the cooling pipe 7 is installed, the bottom plate 9 is separated from the lower die 2, the vertical portion 71 of the cooling pipe 7 is made to enter the cooling block 22, the outer wall of the cooling pipe 7 is made to be in abutting fit with the U-shaped limiting portion 92 of the cooling block 22, after that, the U-shaped limiting portions 92 on the bottom plate 9 are in one-to-one alignment fit, the U-shaped limiting portion 92 of the cooling block 22 and the U-shaped limiting portion 92 of the bottom plate 9 are made to be in fit with the forming fixing portion 93, and the cooling pipe 7 is made to be fixed.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (6)
1. The automobile injection mold is characterized by comprising an upper mold core and a lower mold core which are sequentially arranged from top to bottom;
the upper die core and the lower die core are provided with a forming part respectively on the opposite surfaces of the upper die core and the lower die core, and a die cavity is formed by the matching of the forming parts;
the lower die core is provided with a plurality of cooling blocks, and cooling pipelines are arranged in the cooling blocks;
the cooling block is arranged in a protruding way from the upper end surface of the lower die core to the upper die core;
cooling grooves which are respectively in one-to-one plug-in fit with a plurality of cooling blocks are formed in the lower end face of the upper die core;
the cooling blocks are respectively arranged along the edges of the forming cavity on the lower die core.
2. The rapid cooling and molding automobile injection mold according to claim 1, wherein the cooling blocks comprise a first cooling block and a second cooling block symmetrically arranged at two sides of the lower mold core, and a third cooling block and a fourth cooling block symmetrically arranged at two ends of the lower mold core;
the cooling pipeline comprises a first input pipe embedded in the first cooling block and communicated with the first input pipe, a second input pipe embedded in the second cooling block and communicated with the second input pipe, a third input pipe embedded in the third cooling block and a third output pipe embedded in the fourth cooling block and a fourth input pipe and a fourth output pipe embedded in the fourth cooling block.
3. The rapid cooling and molding automobile injection mold according to claim 2, wherein the first output pipes are symmetrically arranged at two sides of the first input pipe and are respectively communicated with the first input pipe;
the second output pipe is symmetrically arranged on two sides of the second input pipe and is respectively communicated with the second input pipe.
4. The rapid cooling molding injection mold for an automobile according to claim 1, further comprising an upper mold and a lower mold;
the upper die core and the lower die core are respectively embedded in the upper die and the lower die;
a positioning column is arranged on the upper end face of the lower die, and extends upwards from the upper end face of the lower die;
the positioning column extends upwards to exceed the upper end face of the cooling block, and the upper end of the positioning column is provided with a round corner part;
the positioning columns are provided with a plurality of positioning columns, and the positioning columns are respectively fixedly arranged on the lower die core and are close to the corner of the lower die core;
and the upper die is provided with positioning holes in one-to-one alignment, plugging and matching with the positioning columns.
5. The rapid cooling and molding automobile injection mold according to claim 4, wherein the cooling pipeline is in an L-shaped structure, the L-shaped cooling pipeline comprises a vertical part arranged vertically and a transverse part arranged transversely, and a containing groove for containing the cooling pipeline is formed in the lower end face of the lower mold;
the cooling block penetrates through the lower die and the lower die core in sequence, the vertical part of the cooling pipeline is embedded in the cooling block, the transverse part of the cooling pipeline extends outwards along the length direction of the accommodating groove, and the corner of the cooling pipeline is arranged in the accommodating groove.
6. The rapid cooling and molding automobile injection mold according to claim 5, wherein a bottom plate is arranged on the lower end face of the lower mold core, U-shaped limiting parts are respectively arranged at the lower ends of the bottom plate and the cooling block, and fixing parts for fixing the cooling pipelines are formed by matching the U-shaped limiting parts on the bottom plate and the cooling block in a one-to-one matching mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321807663.5U CN220297698U (en) | 2023-07-11 | 2023-07-11 | Automobile injection mold capable of being rapidly cooled and molded |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321807663.5U CN220297698U (en) | 2023-07-11 | 2023-07-11 | Automobile injection mold capable of being rapidly cooled and molded |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220297698U true CN220297698U (en) | 2024-01-05 |
Family
ID=89348243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321807663.5U Active CN220297698U (en) | 2023-07-11 | 2023-07-11 | Automobile injection mold capable of being rapidly cooled and molded |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220297698U (en) |
-
2023
- 2023-07-11 CN CN202321807663.5U patent/CN220297698U/en active Active
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