A high-efficiency silicon-based microneedle mold

Abstract

The utility model discloses a kind of efficient silicon-based microneedle moulds, including mould body;The mould body is composed of upper die plate, lower die plate and base, the upper die plate and lower die plate are fixed between two sides by fixed mechanism, the lower die plate both sides are located in the position below upper die plate and are equipped with ejection mechanism, the lower die plate is equipped with lower mould core inside, the lower die plate bottom end is equipped with telescopic mould core, the telescopic mould core extends into lower mould core inside, the telescopic mould core is installed on base upside, the lower die plate bottom end and base are evenly equipped with a plurality of first spring between.The utility model first separates between upper die plate and lower die plate by ejection mechanism, it is convenient to open mould, after opening mould is completed, when discharging, lower die plate can be pressed downwards, at this time, first spring will shrink, so that telescopic mould core extends into lower mould core inside, so that the material inside lower mould core is ejected, it is convenient to export the material after forming quickly.

Description

Technical Field

[0001] This utility model relates to the field of microneedle mold technology, specifically a high-efficiency silicon-based microneedle mold. Background Technology

[0002] Microneedles are devices with micron-scale needle-like structures and are widely used in fields such as medical treatment (e.g., transdermal drug delivery, biosensoring), cosmetics, and semiconductors. Microneedles require molds during their fabrication.

[0003] Chinese Patent No. 201920052959.8 discloses a microneedle mold and a mold, relating to the field of medical technology. The microneedle mold is provided with a microneedle forming hole and a drainage channel. One end of the drainage channel is connected to the microneedle forming hole, and the other end of the drainage channel is used to connect to a negative pressure generator.

[0004] This invention is very inconvenient to demold during use, which affects the processing effect on materials. Utility Model Content

[0005] The purpose of this invention is to provide a high-efficiency silicon-based microneedle mold to solve the problems raised in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency silicon-based microneedle mold, comprising a mold body; the mold body consists of an upper template, a lower template, and a base; the upper template is detachably mounted on the upper side of the lower template; the upper template and the lower template are fixed together by a fixing mechanism; ejection mechanisms are installed on both sides of the lower template below the upper template; a lower mold core is provided inside the lower template; a telescopic mold core is provided at the bottom end of the lower template; the telescopic mold core extends into the lower mold core; the telescopic mold core is mounted on the upper side of the base; and multiple first springs are evenly installed between the bottom end of the lower template and the base.

[0007] Preferably, a casting hole is provided at the middle position of the upper side of the upper template, and a vent hole is installed on one side of the upper end of the upper template.

[0008] Preferably, a protective sleeve is provided between the base and the lower template, and the protective sleeve is attached to the bottom of the lower template and the upper side of the base with adhesive.

[0009] Preferably, the fixing mechanism consists of a groove, a threaded rod, and a nut. The threaded rod is rotatably installed on both sides of the lower template, the groove is located on both sides of the upper template, the threaded rod rotates into the groove, and the nut is rotatably installed on the upper side of the threaded rod.

[0010] Preferably, the ejection mechanism consists of an installation groove, a second spring, and an ejector rod. The installation groove is located on both sides of the lower template, the bottom end of the ejector rod extends into the installation groove, and the second spring is installed inside the installation groove below the ejector rod.

[0011] Preferably, a limiting plate is provided at the bottom end of the top rod below the inner section of the mounting groove, and the limiting plate is welded to the bottom end of the top rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. First, the upper and lower mold plates are separated by the ejection mechanism to facilitate mold opening. After the mold is opened, when it is necessary to discharge the material, the lower mold plate can be pressed down. At this time, the first spring will retract, so that the telescopic mold core extends into the lower mold core, allowing the material inside the lower mold core to be ejected, making it convenient to quickly export the molded material.

[0014] 2. The protective sleeve is designed to protect the first spring, reduce corrosion during use, and extend its service life.

[0015] 3. When closing the mold, rotate the threaded rod to make it enter the groove of the upper mold plate, and then tighten the nut. Through the cooperation of the threaded rod and the nut, the upper mold plate and the lower mold plate are firmly fixed together, ensuring that the upper mold plate and the lower mold plate will not be relatively displaced during the pouring of liquid silicon-based material and subsequent molding process, thus ensuring the molding accuracy of silicon-based micro needles.

[0016] 4. Once the silicon-based microneedles are formed, the mold opens. At this time, the second spring recovers its elastic deformation, pushing the ejector rod upward. The ejector rod pushes the formed silicon-based microneedles out of the lower mold plate, making it easier to remove the product and improving production efficiency. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the lower template of this utility model;

[0020] Figure 3 This is a side view of the structure of this utility model;

[0021] Figure 4 This utility model Figure 3 A schematic diagram of the structure of A in the middle.

[0022] In the diagram: 1. Mold body; 2. Casting hole; 3. Vent hole; 4. Upper mold plate; 5. Fixing mechanism; 6. Groove; 7. Threaded rod; 8. Nut; 9. Lower mold plate; 10. Protective sleeve; 11. Base; 12. Ejection mechanism; 13. Lower mold core; 14. Telescopic mold core; 15. First spring; 16. Limiting plate; 17. Second spring; 18. Ejector rod; 19. Mounting groove. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 In this embodiment of the present invention, a high-efficiency silicon-based microneedle mold includes a mold body 1. The mold body 1 consists of an upper template 4, a lower template 9, and a base 11. The upper template 4 is detachably installed on the upper side of the lower template 9. The upper template 4 and the lower template 9 are fixed together by a fixing mechanism 5. Ejection mechanisms 12 are installed on both sides of the lower template 9 below the upper template 4. A lower mold core 13 is provided inside the lower template 9. A telescopic mold core 14 is provided at the bottom end of the lower template 9. The telescopic mold core 14 extends into the lower mold core 13 and telescopically extends... The mold core 14 is installed on the upper side of the base 11. Multiple first springs 15 are evenly installed between the bottom end of the lower mold plate 9 and the base 11. A casting hole 2 is provided in the middle of the upper side of the upper mold plate 4. A vent hole 3 is installed on one side of the upper end of the upper mold plate 4. The casting hole 2 in the middle of the upper side of the upper mold plate 4 is used to inject liquid silicon-based material, so that it flows into the mold cavity formed by the upper and lower mold plates. The vent hole 3 on the upper side can discharge the air in the mold cavity, so as to avoid defects such as bubbles and holes in the molded silicon-based microneedles due to residual air, and ensure the molding quality of the microneedles.

[0025] A protective sleeve 10 is provided between the base 11 and the lower template 9. The protective sleeve 10 is attached to the bottom of the lower template 9 and the upper side of the base 11 with adhesive. The protective sleeve 10 is provided to protect the first spring 15, reduce the corrosion of the first spring 15 during use, and extend the service life of the first spring 15.

[0026] The fixing mechanism 5 consists of a groove 6, a threaded rod 7, and a nut 8. The threaded rod 7 is rotatably installed on both sides of the lower template 9, and the groove 6 is located on both sides of the upper template 4. The threaded rod 7 rotates into the groove 6, and the nut 8 is rotatably installed on the upper side of the threaded rod 7. When the mold is closed, the threaded rod 7 is rotated to enter the groove 6 of the upper template 4, and then the nut 8 is tightened. Through the cooperation of the threaded rod 7 and the nut 8, the upper template 4 and the lower template 9 are tightly fixed together, ensuring that the upper template 4 and the lower template 9 will not be relatively displaced during the pouring of liquid silicon-based material and subsequent molding processes, thus ensuring the molding accuracy of silicon-based microneedles.

[0027] The ejection mechanism 12 consists of a mounting groove 19, a second spring 17, and an ejector rod 18. The mounting groove 19 is located on both sides of the lower template 9. The bottom end of the ejector rod 18 extends into the mounting groove 19. The second spring 17 is installed inside the mounting groove 19 below the ejector rod 18. When the silicon-based microneedles are formed, the mold is opened. At this time, the second spring 17 recovers its elastic deformation and pushes the ejector rod 18 upward. The ejector rod 18 ejects the formed silicon-based microneedles from the lower template 9, making it easier to remove the product and improving production efficiency. A limiting plate 16 is set at the bottom end of the ejector rod 18 below the section inside the mounting groove 19. The limiting plate 16 is welded to the bottom end of the ejector rod 18. Its function is to prevent the ejector rod 18 from detaching from the mounting groove 19 under the action of the second spring 17, ensuring that the ejection mechanism 12 can operate stably and reliably. At the same time, it limits the movement stroke of the ejector rod 18 to avoid excessive ejection and damage to the mold or product.

[0028] The working principle and usage process of this utility model are as follows: During operation, the upper template 4 and the lower template 9 close together to form a complete molding space. The fixing mechanism 5 ensures that the position is stable after the mold is closed and prevents misalignment. After the material is formed, the upper template 4 and the lower template 9 are first separated by the ejection mechanism 12 to facilitate mold opening. After the mold is opened, when it is necessary to discharge the material, the lower template 9 can be pressed down. At this time, the first spring 15 will retract, so that the telescopic mold core 14 extends into the lower mold core 13, so that the material inside the lower mold core 13 is ejected, which facilitates the quick export of the formed material.

[0029] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-efficiency silicon-based microneedle mold, comprising a mold body (1); characterized in that: The mold body (1) is composed of an upper template (4), a lower template (9) and a base (11). The upper template (4) is detachably installed on the upper side of the lower template (9). The upper template (4) and the lower template (9) are fixed together by a fixing mechanism (5). The lower template (9) is equipped with an ejection mechanism (12) on both sides below the upper template (4). The lower template (9) is provided with a lower mold core (13) inside. The lower template (9) is provided with a telescopic mold core (14) at the bottom end. The telescopic mold core (14) extends into the lower mold core (13). The telescopic mold core (14) is installed on the upper side of the base (11). Multiple first springs (15) are evenly installed between the bottom end of the lower template (9) and the base (11).

2. The high-efficiency silicon-based microneedle mold according to claim 1, characterized in that: A casting hole (2) is provided at the middle position of the upper side of the upper template (4), and a vent hole (3) is installed on one side of the upper end of the upper template (4).

3. The high-efficiency silicon-based microneedle mold according to claim 1, characterized in that: A protective sleeve (10) is provided between the base (11) and the lower template (9). The protective sleeve (10) is attached to the bottom of the lower template (9) and the upper side of the base (11) by adhesive.

4. The high-efficiency silicon-based microneedle mold according to claim 1, characterized in that: The fixing mechanism (5) consists of a groove (6), a threaded rod (7) and a nut (8). The threaded rod (7) is rotatably installed on both sides of the lower template (9). The groove (6) is located on both sides of the upper template (4). The threaded rod (7) rotates into the groove (6). The nut (8) is rotatably installed on the upper side of the threaded rod (7).

5. The high-efficiency silicon-based microneedle mold according to claim 1, characterized in that: The ejection mechanism (12) consists of an installation groove (19), a second spring (17) and an ejector rod (18). The installation groove (19) is located on both sides of the lower template (9). The bottom end of the ejector rod (18) extends into the installation groove (19). The second spring (17) is installed inside the installation groove (19) and located below the ejector rod (18).

6. The high-efficiency silicon-based microneedle mold according to claim 5, characterized in that: The bottom end of the top rod (18) is provided with a limiting plate (16) located below the inner section of the mounting groove (19), and the limiting plate (16) is welded to the bottom end of the top rod (18).

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