CN220373800U - Injection mold that solidification is prevented to multichannel - Google Patents
Injection mold that solidification is prevented to multichannel Download PDFInfo
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- CN220373800U CN220373800U CN202321590919.1U CN202321590919U CN220373800U CN 220373800 U CN220373800 U CN 220373800U CN 202321590919 U CN202321590919 U CN 202321590919U CN 220373800 U CN220373800 U CN 220373800U
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- circulation mechanism
- solidification
- lower mould
- water
- insulation box
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- 238000002347 injection Methods 0.000 title claims abstract description 28
- 239000007924 injection Substances 0.000 title claims abstract description 28
- 238000007711 solidification Methods 0.000 title claims abstract description 14
- 230000008023 solidification Effects 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 106
- 238000010438 heat treatment Methods 0.000 claims abstract description 42
- 238000010030 laminating Methods 0.000 claims abstract description 4
- 238000009413 insulation Methods 0.000 claims description 32
- 238000001816 cooling Methods 0.000 claims description 29
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000001746 injection moulding Methods 0.000 abstract description 21
- 239000007788 liquid Substances 0.000 abstract description 13
- 150000001875 compounds Chemical class 0.000 abstract description 4
- 229920003023 plastic Polymers 0.000 abstract description 4
- 239000004033 plastic Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000002028 premature Effects 0.000 abstract description 3
- 230000008602 contraction Effects 0.000 abstract 1
- 238000000465 moulding Methods 0.000 abstract 1
- 238000001125 extrusion Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 230000003405 preventing effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The utility model relates to the technical field of injection molds, in particular to a multi-runner solidification-preventing injection mold, which comprises: the bottom plate, the top of bottom plate is connected with the base, the top of base inner wall is connected with the lower mould, one side of base inner wall is provided with circulation mechanism, and circulation mechanism centers on the surface of laminating at the lower mould, be provided with heating element on the circulation mechanism, heating element is used for cooperating circulation mechanism to heat the lower mould, drives the upper die through the joint plate through four electric telescopic rod contractions and descends to the inside compound die of lower mould and pour into the die cavity with the injection molding liquid through a plurality of runner holes into, adds water and starts heating element in the circulation mechanism this moment, and heating element heats the water in the circulation mechanism and starts circulation mechanism simultaneously and can heat the lower mould, and hot water passes through circulation mechanism and lower mould contact, avoids the injection molding liquid temperature to be too low and leads to premature solidification for injection molding die prevents that solidification effect is good, thereby improves the processingquality of finished product of moulding plastics.
Description
Technical Field
The utility model relates to the technical field of injection molds, in particular to a multi-runner solidification-preventing injection mold.
Background
The injection mold is a tool for producing plastic products, and also a tool for endowing the plastic products with complete structures and precise dimensions, and the injection molding is a processing method used for mass production of parts with complex shapes, specifically, the injection mold is used for injecting heated and melted plastic into a mold cavity at high pressure by an injection molding machine, and cooling and solidifying are carried out to obtain the formed products.
At present, the traditional injection mold has a plurality of defects, when the injection molding material is poured into the injection mold, the injection mold starts to solidify after partial injection molding liquid is contacted with the mold cavity due to the excessively low temperature of the injection mold, so that the injection molding effect is affected, the quality of a finished product is reduced, and therefore, the multi-runner solidification-preventing injection mold is provided.
Disclosure of Invention
Based on the defects in the prior art mentioned in the background art, the utility model provides a multi-runner solidification-preventing injection mold to solve the problem that too low temperature of the injection mold causes early solidification of injection liquid during injection.
The utility model adopts the following technical scheme to overcome the technical problems, and specifically comprises the following steps:
a multi-runner solidification-resistant injection mold comprising: the bottom plate, the top of bottom plate is connected with the base, the top of base inner wall is connected with the lower mould, one side of base inner wall is provided with circulation mechanism, and circulation mechanism centers on the surface of laminating at the lower mould, be provided with heating element on the circulation mechanism, heating element is used for cooperating circulation mechanism to heat the lower mould, the opposite side of base inner wall is provided with cooling body, and cooling body is connected with the lower mould, cooling body is used for cooling down the lower mould, the four corners at bottom plate top all is connected with electric telescopic handle, four be connected with the linking board between the electric telescopic handle, the bottom of linking board is connected with the mould, a plurality of runner holes have all been seted up at the inside of going up the mould and the top of linking board, the bottom of bottom plate inner wall is connected with ejection mechanism, and the ejection mechanism extends to the inside of lower mould, ejection mechanism is used for taking out fast the shaping article in the lower mould.
As a further scheme of the utility model: the circulation mechanism comprises an insulation box, a water inlet, a first water pump, a water supply pipe, a coiled pipe and a water return pipe, wherein the insulation box is arranged on one side of the bottom of the inner wall of the base, the water inlet is formed in the top of the insulation box, the first water pump is connected to one side of the insulation box, the input end of the first water pump extends to the inside of the insulation box, the water supply pipe is connected with the output end of the first water pump, the coiled pipe is wound on the outer surface of the lower die, one end of the water supply pipe is connected with the outer surface of the coiled pipe, the water return pipe is connected to the top of the insulation box, one end of the water return pipe is connected with the outer surface of the coiled pipe, the hot water is in contact with the lower die through the coiled pipe, so that premature solidification caused by too low temperature of injection molding liquid is avoided, the solidification preventing effect of the injection molding die is good, and the processing quality of injection molding finished products is improved.
As still further aspects of the utility model: the heating element includes three heating rod, display screen and thermoscope, and is three the heating rod is connected in the front of insulation can, and the one end of three heating rod all extends to the inside of insulation can, the display screen sets up in the front of heating rod, the top at the heating rod is connected to the thermoscope, and the one end of thermoscope extends to the inside of heating rod.
As still further aspects of the utility model: the cooling mechanism comprises a second water pump, a snake-shaped cavity and two connecting pipes, wherein the snake-shaped cavity is formed in the inner surface of the lower die, one ends of the two connecting pipes are connected with two ends of the snake-shaped cavity respectively, one of the two ends of the connecting pipes is connected with the output end of the second water pump, the second water pump is started to convey cold water to the inside of the snake-shaped cavity through one connecting pipe, the cold water is in contact with the inside of the lower die, and therefore the lower die is cooled rapidly to accelerate the rapid cooling of a finished product.
As still further aspects of the utility model: the ejecting mechanism comprises a hollow block, four mounting springs and a connecting plate, wherein the hollow block is fixedly connected to the bottom of the inner wall of the base, the four mounting springs are connected to the bottom of the lower die, and the connecting plate is connected with the bottom ends of the four mounting springs.
As still further aspects of the utility model: the ejecting mechanism further comprises a round groove, a sliding rod and a pushing block, wherein the round groove is formed in the bottom of the inner wall of the lower die, the sliding rod is slidably connected in the hollow block, one end of the sliding rod extends to the inside of the lower die, the other end of the sliding rod is connected with the top of the connecting plate, the pushing block is connected to the top end of the sliding rod, the finished product is ejected from the inner surface of the lower die, automatic demolding of the finished product is completed, and accordingly workers can conveniently take out the cooled finished product, and the working efficiency is improved.
As still further aspects of the utility model: the front face of the base is hinged with two protective doors.
After adopting the structure, compared with the prior art, the utility model has the following advantages:
1. the four electric telescopic rods are started to shrink, the upper die is driven to descend to the inside of the lower die through the connecting plate to be attached, the die assembly is completed, injection molding liquid is injected through the plurality of runner holes, water is added into the heat insulation box through the water inlet, a plurality of heating rods are started to heat the water, the temperature of the water is detected through the thermometer and fed back to the display screen, when the temperature of the water is enough, the first water pump is started to convey hot water in the heat insulation box to the inside of the coiled pipe around the outer surface of the lower die through the water conveying pipe, the hot water is contacted with the lower die through the coiled pipe to complete heating of the lower die, premature solidification caused by too low temperature of the injection molding liquid is avoided, the anti-solidification effect of the injection molding die is good, and therefore the processing quality of injection molding finished products is improved.
2. The pushing block is pressed to the mould in the time of the compound die and drives the sliding rod to slide downwards towards the inside of hollow block to drive the connecting plate and move downwards, four installation springs will stretch simultaneously, the pushing block is located the internal surface of sliding rod this moment, start second water pump and carry the inside in snakelike chamber with cold water through one of them linking pipe, cold water and the inside contact of lower mould, thereby carry out the quick cooling of quick cooling to the lower mould and accelerate the finished product, afterwards the cold water carries to another one through the one end in snakelike chamber and carries out the discharge, afterwards four electric telescopic handle stretch out and drive the mould through the connecting plate and rise and remove the extrusion to the pushing block, four installation springs will reset at this moment and make the pushing block withdraw from the internal surface of circular slot and upwards push up the finished product piece, make the finished product pop out from the internal surface of lower mould, accomplish the automatic drawing of patterns of finished product, thereby the staff of being convenient for take out the finished product after cooling, thereby improve work efficiency.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a schematic view of the circulation mechanism and heating assembly of the present utility model;
FIG. 3 is a schematic view of a cooling mechanism according to the present utility model;
FIG. 4 is a schematic view of an ejector mechanism according to the present utility model;
fig. 5 is an enlarged schematic view at a of fig. 4.
In the figure: 1. a bottom plate; 2. a base; 3. a lower die; 4. a circulation mechanism; 401. an insulation box; 402. a water inlet; 403. a first water pump; 404. a water supply pipe; 405. a serpentine tube; 406. a water return pipe; 5. a heating assembly; 501. a heating rod; 502. a display screen; 503. a temperature measuring instrument; 6. a cooling mechanism; 601. a second water pump; 602. a serpentine cavity; 603. a connecting pipe; 7. an upper die; 8. an ejecting mechanism; 801. a hollow block; 802. installing a spring; 803. a connecting plate; 804. a circular groove; 805. a slide bar; 806. a pushing block; 9. a protective door.
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.
Example 1:
referring to fig. 1 to 5, in an embodiment of the present utility model, a multi-runner solidification-preventing injection mold includes: the bottom plate 1, the top of bottom plate 1 is connected with base 2, the top of base 2 inner wall is connected with lower mould 3, one side of base 2 inner wall is provided with circulation mechanism 4, and circulation mechanism 4 centers on the surface of laminating at lower mould 3, be provided with heating element 5 on the circulation mechanism 4, heating element 5 is used for cooperating circulation mechanism 4 to heat lower mould 3, the opposite side of base 2 inner wall is provided with cooling body 6, and cooling body 6 is connected with lower mould 3, cooling body 6 is used for cooling down lower mould 3, the four corners at bottom plate 1 top all is connected with electric telescopic handle, be connected with the linking board between four electric telescopic handle, the bottom of linking board is connected with mould 7, a plurality of runner holes have all been seted up to the inside of going up mould 7 and the top of linking board, the bottom of bottom plate 1 inner wall is connected with ejection mechanism 8, and ejection mechanism 8 extends to the inside of lower mould 3, ejection mechanism 8 is used for taking out the shaping article in the lower mould 3 fast.
Specifically, during the use, make the linking plate drive go up mould 7 and descend to the inside compound die of lower mould 3 through four electric telescopic handle shrink, simultaneously with injection molding liquid through a plurality of runner holes injection die intracavity, add water and start heating element 5 to circulation mechanism 4 this moment, heating element 5 heats the water in the circulation mechanism 4 and start circulation mechanism 4 simultaneously and can heat lower mould 3, hot water passes through circulation mechanism 4 and lower mould 3 contact, thereby avoid the early solidification of injection molding liquid, go up mould 7 and press ejection mechanism 8 and shrink when carrying out the compound die, switch on external water source and start cooling mechanism 6 simultaneously, can carry out the cooling of quick cooling to the lower mould 3 and accelerate the finished product, four electric telescopic handle will stretch out and drive the ascending of going up mould 7 through the linking plate after the cooling is accomplished and remove the extrusion to ejection mechanism 8, ejection mechanism 8 will reset and promote the finished product to pop out from the inside of lower mould 3, thereby the staff of being convenient for take out the finished product.
Example 2:
referring to fig. 2, in the embodiment of the utility model, a multi-channel solidification-preventing injection mold, a circulation mechanism 4 includes an insulation box 401, a water inlet 402, a first water pump 403, a water pipe 404, a coiled pipe 405 and a water return pipe 406, the insulation box 401 is disposed at one side of the bottom of the inner wall of a base 2, the water inlet 402 is disposed at the top of the insulation box 401, the first water pump 403 is connected at one side of the insulation box 401, an input end of the first water pump 403 extends to the inside of the insulation box 401, the water pipe 404 is connected with an output end of the first water pump 403, the coiled pipe 405 is wound on the outer surface of the lower mold 3, one end of the water pipe 404 is connected with the outer surface of the coiled pipe 405, the water return pipe 406 is connected at the top of the insulation box 401, one end of the water return pipe 406 is connected with the outer surface of the coiled pipe 405, the heating assembly 5 includes three heating bars 501, a display 502 and a temperature measuring instrument 503, the three heating bars 501 are connected at the front of the insulation box 401, one ends of the three heating bars 501 all extend to the inside of the insulation box 401, the display 502 is disposed at the front of the heating bars, the temperature measuring instrument is connected at the top of the heating bars 501, and one end of the heating bars 501 extends to one end of the inside of the heating bars 503.
Specifically, four electric telescopic rods are started to shrink, the upper die 7 is driven to descend to the inside of the lower die 3 through the connecting plate to be attached to complete die assembly, injection molding liquid is injected through a plurality of runner holes, water is added into the heat insulation box 401 through the water inlet 402, a plurality of heating rods 501 are started to heat the water, the temperature of the water is detected through the temperature measuring instrument 503 and fed back to the display screen 502, when the temperature of the water is enough, the first water pump 403 is started to convey hot water in the heat insulation box 401 to the inside of the coiled pipe 405 surrounding the outer surface of the lower die 3 through the water supply pipe 404, the hot water is contacted with the lower die 3 through the coiled pipe 405, so that the lower die 3 is heated, and the temperature in the lower die 3 is increased to avoid solidification of the injection molding liquid.
Example 3:
referring to fig. 1-5, in an embodiment of the present utility model, a cooling mechanism 6 includes a second water pump 601, a serpentine cavity 602 and two connecting pipes 603, the serpentine cavity 602 is opened on the inner surface of the lower mold 3, one end of each connecting pipe 603 is connected with two ends of the serpentine cavity 602, the other end of one connecting pipe 603 is connected with the output end of the second water pump 601, an ejecting mechanism 8 includes a hollow block 801, four mounting springs 802 and a connecting plate 803, the hollow block 801 is fixedly connected at the bottom of the inner wall of the base 2, the four mounting springs 802 are all connected at the bottom of the lower mold 3, the connecting plate 803 is connected with the bottom ends of the four mounting springs 802, the ejecting mechanism 8 further includes a circular groove 804, a sliding rod 805 and a pushing block 806, the circular groove 804 is opened at the bottom of the inner wall of the lower mold 3, the sliding rod 805 is slidably connected inside the hollow block 801, one end of the sliding rod 805 extends to the inside of the lower mold 3, the other end of the sliding rod 805 is connected with the top of the connecting plate 803, the pushing block 806 is connected with the top of the sliding rod 805, and the front face of the base 2 is hinged with two protection doors 9.
Specifically, the pushing block 806 is pressed by the upper die 7 to drive the sliding rod 805 to slide downwards towards the inside of the hollow block 801 while die assembly is performed, thereby driving the connecting plate 803 to move downwards and enabling the four mounting springs 802 to stretch, at this time, the pushing block 806 is located on the inner surface of the sliding rod 805, the second water pump 601 is started to convey cold water to the inside of the serpentine cavity 602 through one connecting pipe 603, the cold water is in contact with the inside of the lower die 3 to rapidly cool the lower die 3 and accelerate the rapid cooling of the finished product, then the cold water is conveyed to the other connecting pipe 603 through one end of the serpentine cavity 602 to be discharged, and then the four electric telescopic rods stretch out to drive the upper die 7 to rise through the connecting plate to release the extrusion of the pushing block 806, at this time, the four mounting springs 802 will reset to enable the pushing block 806 to withdraw from the inner surface of the circular groove 804 to push the finished product upwards, so that the finished product is ejected from the inner surface of the lower die 3, the finished product is conveniently taken by a worker, and the inside of the base 2 is conveniently overhauled through the arrangement of the two protection doors 9.
The working principle of the utility model is as follows: when the device is used, four electric telescopic rods are started, the four electric telescopic rods shrink and drive the upper die 7 to descend to the inside of the lower die 3 through the connecting plate to be attached, after the lower die 3 is clamped with the lower die 7, a worker injects injection molding liquid through a plurality of runner holes, at the moment, the worker adds water into the heat insulation box 401 through the water inlet 402, simultaneously starts a plurality of heating rods 501 to heat the water, detects the temperature of the water through the temperature detector 503 and feeds the water back to the display screen 502 during the heating, when the temperature of the water is enough, the first water pump 403 is started, the input end of the first water pump 403 sucks hot water from the heat insulation box 401, after the hot water flows into the water supply pipe 404 through the output end of the first water pump 403, the hot water is conveyed into the serpentine pipe 405 around the outer surface of the lower die 3, the hot water contacts the lower die 3 through the serpentine pipe 405, and the lower die 3 is heated, the temperature of the lower die 3 is raised to avoid early solidification of injection molding liquid, hot water in the coiled pipe 405 returns to the interior of the heat insulation box 401 again through the water return pipe 406 to be recycled, the upper die 7 of the lower die 3 is pressed by the pushing block 806 to drive the sliding rod 805 to slide towards the interior of the hollow block 801 while the upper die 7 is clamped, so that the connecting plate 803 moves downwards, simultaneously the four mounting springs 802 are stretched, at the moment, the pushing block 806 is positioned on the inner surface of the sliding rod 805, then the input end of the second water pump 601 is communicated with an external water source through a worker and the second water pump 601 is started, the output end of the second water pump 601 conveys cold water to the interior of the coiled cavity 602 through one connecting pipe 603, thereby rapidly cooling the lower die 3 to accelerate the rapid cooling of a finished product, then the cold water is conveyed into the other connecting pipe 603 through one end of the coiled cavity 602 and discharged again, afterwards, the four electric telescopic rods extend out and drive the upper die 7 to ascend through the connecting plate to release the extrusion of the pushing block 806, at the moment, the four mounting springs 802 reset and push the sliding rod 805 through the connecting plate 803 to enable the pushing block 806 to withdraw from the inner surface of the circular groove 804 to push up the finished product, so that the finished product is ejected out of the lower die 3, and the finished product is taken out.
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.
Claims (7)
1. A multi-runner solidification-preventing injection mold, comprising: bottom plate (1), the top of bottom plate (1) is connected with base (2), the top of base (2) inner wall is connected with lower mould (3), one side of base (2) inner wall is provided with circulation mechanism (4), and circulation mechanism (4) are around laminating at the surface of lower mould (3), be provided with heating element (5) on circulation mechanism (4), heating element (5) are used for cooperating circulation mechanism (4) to heat lower mould (3), the opposite side of base (2) inner wall is provided with cooling body (6), and cooling body (6) are connected with lower mould (3), cooling body (6) are used for cooling down lower mould (3), the four corners at bottom plate (1) top all is connected with electric telescopic handle, four be connected with the linking board between the electric telescopic handle, the bottom of linking board is connected with mould (7), a plurality of runner holes have all been seted up at the inside of going up of mould (7) and the top of linking board, the bottom of bottom plate (1) inner wall is connected with ejection mechanism (8), and ejection mechanism (8) are used for taking out in quick forming product (8) to lower mould (3).
2. The solidification injection mold is prevented to multichannel according to claim 1, wherein the circulation mechanism (4) comprises an insulation box (401), a water inlet (402), a first water pump (403), a water supply pipe (404), a coiled pipe (405) and a water return pipe (406), the insulation box (401) is arranged on one side of the bottom of the inner wall of the base (2), the water inlet (402) is formed in the top of the insulation box (401), the first water pump (403) is connected on one side of the insulation box (401), the input end of the first water pump (403) extends to the inside of the insulation box (401), the water supply pipe (404) is connected with the output end of the first water pump (403), the coiled pipe (405) is wound on the outer surface of the lower die (3), one end of the water supply pipe (404) is connected with the outer surface of the coiled pipe (405), the water return pipe (406) is connected on the top of the insulation box (401), and one end of the water return pipe (406) is connected with the outer surface of the coiled pipe (405).
3. The multi-runner solidification-preventing injection mold according to claim 2, wherein the heating assembly (5) comprises three heating rods (501), a display screen (502) and a thermometer (503), the three heating rods (501) are connected to the front surface of the heat insulation box (401), one ends of the three heating rods (501) all extend to the inside of the heat insulation box (401), the display screen (502) is arranged on the front surface of the heating rods (501), the thermometer (503) is connected to the top of the heating rods (501), and one end of the thermometer (503) extends to the inside of the heating rods (501).
4. A multi-runner solidification-preventing injection mold according to claim 3, wherein the cooling mechanism (6) comprises a second water pump (601), a serpentine cavity (602) and two connecting pipes (603), the serpentine cavity (602) is formed on the inner surface of the lower mold (3), one end of each connecting pipe (603) is connected with two ends of the serpentine cavity (602), and the other end of one connecting pipe (603) is connected with the output end of the second water pump (601).
5. The multi-runner solidification-preventing injection mold according to claim 4, wherein the ejection mechanism (8) comprises a hollow block (801), four mounting springs (802) and a connecting plate (803), the hollow block (801) is fixedly connected to the bottom of the inner wall of the base (2), the four mounting springs (802) are connected to the bottom of the lower mold (3), and the connecting plate (803) is connected to the bottom of the four mounting springs (802).
6. The multi-runner solidification-preventing injection mold according to claim 5, wherein the ejection mechanism (8) further comprises a circular groove (804), a sliding rod (805) and a pushing block (806), the circular groove (804) is formed in the bottom of the inner wall of the lower mold (3), the sliding rod (805) is slidably connected in the hollow block (801), one end of the sliding rod (805) extends into the lower mold (3), the other end of the sliding rod (805) is connected with the top of the connecting plate (803), and the pushing block (806) is connected to the top of the sliding rod (805).
7. A multi-channel solidification-preventing injection mold according to claim 6, characterized in that the front surface of the base (2) is hinged with two protective doors (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321590919.1U CN220373800U (en) | 2023-06-20 | 2023-06-20 | Injection mold that solidification is prevented to multichannel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321590919.1U CN220373800U (en) | 2023-06-20 | 2023-06-20 | Injection mold that solidification is prevented to multichannel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220373800U true CN220373800U (en) | 2024-01-23 |
Family
ID=89563784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321590919.1U Active CN220373800U (en) | 2023-06-20 | 2023-06-20 | Injection mold that solidification is prevented to multichannel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220373800U (en) |
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2023
- 2023-06-20 CN CN202321590919.1U patent/CN220373800U/en active Active
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