High sealing injection mold

Abstract

The application provides a high-sealing injection mold, and relates to the field of injection molds.The injection mold comprises an upper mold and a lower mold, the top of the upper mold is connected with a hydraulic cylinder, the lower mold is internally provided with an ejection mechanism, the edges of the cavities of the upper mold and the lower mold are respectively provided with mutually matching tapered surfaces, and a sealing strip and a sealing groove that are sealingly matched are respectively arranged on the two tapered surfaces; the tapered surface of the lower mold expands toward the outside of the cavity; the top of the upper mold is provided with an exhaust hole, and the exhaust hole is provided with an exhaust sealing structure; the bottom of the cavity of the lower mold is provided with multiple ejection holes at intervals, and the ejection holes are provided with tapered sealing sections near one end of the cavity; the ejection mechanism comprises an elastic driving assembly and multiple ejector rods connected with the elastic driving assembly, the multiple ejector rods are respectively and one-to-one correspondingly arranged in the multiple ejection holes, and one end of the ejector rod is provided with a tapered matching part matched with the tapered sealing section.The application is sealed at multiple leakage points of the mold, and has high sealing performance.

Description

Technical Field

[0001] This utility model relates to the field of injection molds, and in particular to a high-sealing injection mold. Background Technology

[0002] Injection molds are tools used to produce plastic products; they also give plastic products their complete structure and precise dimensions. Injection molding is a processing method used for the mass production of certain complex-shaped parts. Specifically, it refers to injecting molten plastic into a mold cavity under high pressure using an injection molding machine, and then cooling and solidifying it to obtain the molded product.

[0003] Existing plastic injection molds have poor sealing, allowing air to enter the mold during production and affecting product molding quality. Leaks can also occur at the ejection mechanism and venting points, further impacting product quality. Utility Model Content

[0004] In view of the above problems, the present invention provides an embodiment of the present invention to provide a high-sealing injection mold that overcomes or at least partially solves the above problems.

[0005] A high-sealing injection mold includes an upper mold and a lower mold arranged opposite each other on a mounting frame. The top of the upper mold is connected to a hydraulic cylinder mounted on the mounting frame, and the lower mold is equipped with an ejection mechanism.

[0006] The upper mold and the lower mold have matching conical surfaces on their cavity edges, and sealing strips and sealing grooves are respectively provided on the two conical surfaces; wherein, the conical surface of the lower mold expands outward toward the cavity.

[0007] The upper mold has an exhaust hole at the top that communicates with the cavity of the upper mold, and an exhaust sealing structure is provided inside the exhaust hole; the lower mold has multiple ejection holes at intervals at the bottom of the cavity, and a conical sealing section is provided at one end of the ejection hole near the cavity.

[0008] The ejection mechanism includes an elastic drive assembly and a plurality of ejector rods connected to the elastic drive assembly. The plurality of ejector rods are respectively inserted through the plurality of ejection holes, and one end of each ejector rod is provided with a tapered mating part adapted to the tapered sealing section.

[0009] Preferably, the sealing groove is a curved groove inclined along a conical surface, and the sealing strip is shaped to fit the sealing groove.

[0010] Preferably, the taper of the conical surface is 0.5°-1.5°.

[0011] Preferably, the exhaust sealing structure includes an exhaust cylinder body sealed in the exhaust hole, the exhaust cylinder body having a through hole in the middle; a plug block is movably inserted in the through hole, and a fixing rod is connected to the end of the plug block away from the cavity; an adjusting block is inserted at the outer end of the through hole, the adjusting block being threaded to the outside of the fixing rod; a compression spring abuts between the plug block and the adjusting block.

[0012] The exhaust cylinder body is also provided with an exhaust channel, which is located outside the through hole and the outer end of the exhaust channel is connected to the outside, while the inner end of the exhaust channel is sealed.

[0013] Multiple connecting holes are provided axially between the through hole and the exhaust channel; the connecting holes are inclined, with the end of the connecting hole connected to the through hole being higher than the end of the connecting hole connected to the exhaust channel.

[0014] Preferably, at least one air intake baffle is provided in the communicating hole, and the air intake baffle includes a first baffle and a second baffle;

[0015] One end of the first baffle is fixed to the lower wall of the connecting hole, and the other end extends to the middle of the connecting hole;

[0016] One end of the second baffle is hinged to the upper wall of the connecting hole, and the other end extends to the middle of the connecting hole and overlaps the suspended end of the second baffle.

[0017] Preferably, the exhaust cylinder is stepped, with its larger diameter end located outside the exhaust port and sealed to the end of the exhaust port.

[0018] Preferably, the bottom of the lower mold is provided with a base, and a cavity is opened inside the lower mold;

[0019] The drive assembly includes a telescopic cylinder, a top plate, and multiple elastic columns. The top plate is movably disposed within the cavity. The multiple push rods are spaced apart and connected to the top of the top plate. The multiple elastic columns are spaced apart and connected to the bottom of the top plate and the bottom of the cavity. The telescopic cylinder passes through the base and the lower mold and is connected to the center of the bottom of the top plate.

[0020] Preferably, the taper of the conical sealing section is 1°-3°.

[0021] Preferably, a sealing ring is circumferentially embedded at the end of the conical sealing section away from the cavity.

[0022] Preferably, the surface of the conical surface is coated with a nanocomposite coating.

[0023] This application specifically includes the following advantages:

[0024] In the embodiments of this application, an upper mold and a lower mold are arranged opposite each other on a mounting frame. The top of the upper mold is connected to a hydraulic cylinder mounted on the mounting frame. An ejection mechanism is provided inside the lower mold. The cavities of the upper mold and the lower mold are respectively provided with mutually matching conical surfaces. Sealing strips and sealing grooves are respectively provided on the two conical surfaces. The conical surface of the lower mold expands outward toward the cavity. The top of the upper mold has an exhaust hole communicating with the cavity of the upper mold. An exhaust sealing structure is provided inside the exhaust hole. The bottom of the cavity of the lower mold has multiple ejection holes spaced apart. A conical sealing section is provided at one end of the ejection hole near the cavity. The ejection mechanism includes an elastic drive assembly and multiple push rods connected to the elastic drive assembly. The multiple push rods are respectively inserted through the multiple ejection holes, and one end of the push rod is provided with a conical mating part adapted to the conical sealing section. By setting mutually matching conical surfaces at the cavity edges of the upper and lower molds, with the lower mold's conical surface being outwardly flared, the upper mold's conical surface can press tightly against the lower mold's conical surface when pressed down, thus sealing the cavity. Furthermore, by setting sealing strips and sealing grooves on the two matching conical surfaces, the sealing strips are embedded in the sealing grooves when the two conical surfaces are in contact, forming a stepped seal on the inclined conical surfaces, further improving the cavity's sealing effect. A vent hole at the top of the upper mold allows for the discharge of high-temperature, high-pressure gases generated during the molding process; a vent sealing structure at the vent hole prevents external gases from entering the cavity. A conical sealing section is set in the ejector hole, and a matching conical mating part is provided on the ejector rod. This allows the conical mating part to be pressed against the conical sealing section under the pressure of the internal high-temperature, high-pressure gases or under the action of the elastic drive component, forming a reliable conical surface seal. This application improves the cavity's sealing effect by sealing multiple leakage points in the mold, preventing gas entry and leakage of injected molten plastic, thus achieving high sealing performance. Attached Figure Description

[0025] To more clearly illustrate the technical solution of this application, the drawings used in the description of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a cross-sectional view of the high-sealing injection mold of this utility model;

[0027] Figure 2 This is a utility model Figure 1 Enlarged schematic diagram of the structure at point A in the middle;

[0028] Figure 3 This is a utility model Figure 1Enlarged schematic diagram of the structure at point B;

[0029] Figure 4 This is a schematic diagram of the structure of the air intake baffle of this utility model;

[0030] Figure 5 This is a utility model Figure 1 Enlarged schematic diagram of the structure at point C;

[0031] Reference numerals: 1. Mounting bracket; 11. Base; 2. Upper mold; 21. Vent hole; 3. Lower mold; 31. Ejection hole; 311. Conical sealing section; 312. Sealing ring; 32. Cavity; 4. Hydraulic cylinder; 5. Ejection mechanism; 51. Ejector rod; 511. Conical mating part; 52. Telescopic cylinder; 53. Top plate; 54. Elastic column; 6. Conical surface; 61. Sealing strip; 62. Sealing groove; 7. Vent sealing structure; 71. Vent cylinder; 72. Through hole; 73. Block; 74. Fixing rod; 75. Adjusting block; 76. Compression spring; 77. Vent passage; 78. Connecting hole; 781. First baffle; 782. Second baffle. Detailed Implementation

[0032] To make the objectives, features, and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0033] Reference Figures 1-5 This diagram illustrates the structure of a high-sealing injection mold according to the present invention. Specifically, it includes the following structure: an upper mold 2 and a lower mold 3 arranged opposite each other on a mounting frame 1; the top of the upper mold 2 is connected to a hydraulic cylinder 4 mounted on the mounting frame 1; and an ejection mechanism 5 is provided inside the lower mold 3. The invention is characterized by...

[0034] The upper mold 2 and the lower mold 3 are respectively provided with matching conical surfaces 6 on their cavity edges, and sealing strips 61 and sealing grooves 62 are respectively provided on the two conical surfaces 6; wherein, the conical surface 6 of the lower mold 3 expands outward toward the cavity.

[0035] The upper mold 2 has an exhaust hole 21 at the top that communicates with the cavity of the upper mold 2, and an exhaust sealing structure 7 is provided inside the exhaust hole 21; the lower mold 3 has a plurality of ejection holes 31 at intervals at the bottom of the cavity, and a conical sealing section 311 is provided at one end of the ejection hole 31 near the cavity.

[0036] The ejection mechanism 5 includes an elastic drive assembly and a plurality of ejector rods 51 connected to the elastic drive assembly. The plurality of ejector rods 51 are respectively inserted through the plurality of ejection holes 31, and one end of the ejector rod 51 is provided with a tapered mating part 511 adapted to the tapered sealing section 311.

[0037] In the embodiments of this application, an upper mold 2 and a lower mold 3 are arranged opposite each other on a mounting frame 1. The top of the upper mold 2 is connected to a hydraulic cylinder 4 mounted on the mounting frame 1. An ejection mechanism 5 is provided inside the lower mold 3. The cavities of the upper mold 2 and the lower mold 3 are respectively provided with mutually matching conical surfaces 6. Sealing strips 61 and sealing grooves 62 are respectively provided on the two conical surfaces 6. The conical surfaces 6 of the lower mold 3 expand outward toward the cavity. The top of the upper mold 2 has an opening that connects with the upper mold. The lower mold 3 has a cavity with an exhaust hole 21, and an exhaust sealing structure 7 is provided inside the exhaust hole 21. The bottom of the cavity of the lower mold 3 is provided with a plurality of ejection holes 31 at intervals, and a conical sealing section 311 is provided at one end of the ejection hole 31 near the cavity. The ejection mechanism 5 includes an elastic drive assembly and a plurality of ejector rods 51 connected to the elastic drive assembly. The plurality of ejector rods 51 are respectively inserted through the plurality of ejection holes 31, and one end of the ejector rod 51 is provided with a conical mating part 511 adapted to the conical sealing section 311. By providing mutually matching conical surfaces 6 at the cavity edges of the upper mold 2 and the lower mold 3, with the conical surface 6 of the lower mold 3 being outwardly flared, the upper mold 2, when pressed down, can have its conical surface 6 press tightly against the conical surface 6 of the lower mold 3, thereby sealing the cavity. Furthermore, by providing sealing strips 61 and sealing grooves 62 on the two matching conical surfaces 6, the sealing strip 61 is embedded in the sealing groove 62 when the two conical surfaces 6 are in contact, forming a stepped seal on the inclined conical surfaces 6, further improving the cavity sealing. Sealing effect: By opening an vent 21 at the top of the upper mold 2, high-temperature and high-pressure gases during the molding process can be discharged. An vent sealing structure 7 is provided at the vent 21 to prevent external gases from entering the cavity. A conical sealing section 311 is provided in the ejector hole 31, and a matching conical mating part 511 is provided in the ejector rod 51. This allows the conical mating part 511 to be pressed against the conical sealing section 311 under the pressure of the internal high-temperature and high-pressure gases or under the action of the elastic drive component, forming a reliable conical surface seal. This application improves the sealing effect of the cavity by sealing multiple leakage points in the mold, preventing gas entry and leakage of injected molten plastic, thus achieving high sealing performance.

[0038] The following will further describe a high-sealing injection mold in this exemplary embodiment.

[0039] In the embodiments of this application, reference is made to Figure 1The mounting frame 1 has a frame structure. The upper mold 2 is slidably disposed within the mounting frame 1, and its top is connected to a hydraulic cylinder 4 located at the top of the mounting frame 1. The hydraulic cylinder 4 drives the upper mold 2 to move up and down, achieving mold closing and opening with the lower mold 3 installed at the bottom of the mounting frame 1. The upper mold 2 and the lower mold 3 each have cavities, forming a closed cavity after mold closing. The cavities of the upper mold 2 and the lower mold 3 are respectively provided with mutually matching conical surfaces 6. Sealing strips 61 and sealing grooves 62 are respectively provided on the two conical surfaces 6 for sealing. The conical surface 6 of the lower mold 3 expands outward toward the cavity. When the upper mold 2 moves downward to close under the action of the hydraulic cylinder 4, the conical surface 6 generates a radial force, forcing the sealing surfaces to fit tightly together, forming the first sealing structure of the cavity. At least one set of sealing strips 61 and sealing grooves 62 are provided on the conical surface 6, preferably two to three sets; specifically, the conical surface 6 of the upper mold 2 is provided with protruding sealing strips 61 and recessed sealing grooves 62 at intervals along its circumference, and the conical surface 6 of the lower mold 3 is provided with corresponding recessed sealing grooves 62 and protruding sealing strips 61. In this way, when the upper mold 2 and the lower mold 3 are closed, the sealing strips 61 are embedded in the sealing grooves 62, forming a stepped sealing structure on the conical surface 6, thereby further improving the sealing effect of the cavity.

[0040] As an example, refer to Figure 2 The sealing groove 62 is a curved groove inclined along the conical surface 6, and the sealing strip 61 is shaped to fit the sealing groove 62. In this way, when the upper mold 2 is pressed down, its sealing strip 61 can be quickly embedded in the sealing groove 62.

[0041] As an example, the taper of the conical surface 6 is 0.5°-1.5°, which can obtain a larger clamping force while avoiding slippage of the conical surface 6 between the upper and lower molds 3.

[0042] As an example, the surface of the conical surface 6 is coated with a nanocomposite coating. Preferably, it is a WS□ / CrN nanocomposite coating, which can reduce frictional resistance, ensure mold closing accuracy, and fill micro-gaps to improve sealing performance.

[0043] In the embodiments of this application, reference is made to Figure 1 The upper mold 2 has an exhaust hole 21 at its top that communicates with the cavity of the upper mold 2, and an exhaust sealing structure 7 is provided inside the exhaust hole 21. By providing an exhaust hole 21 and an exhaust sealing structure 7 at the top of the upper mold 2, it is possible to ensure smooth exhaust while preventing gas backflow at the exhaust hole 21.

[0044] As an example, refer to Figure 3The exhaust sealing structure 7 includes an exhaust cylinder 71 sealed in the exhaust hole 21, with a through hole 72 extending through the middle of the exhaust cylinder 71; a plug 73 is movably inserted in the through hole 72, and a fixing rod 74 is connected to the end of the plug 73 away from the cavity; an adjusting block 75 is inserted at the outer end of the through hole 72, and the adjusting block 75 is threaded to the outside of the fixing rod 74; a compression spring 76 abuts against the plug 73 and the adjusting block 75; when not venting, the plug 73 is located at the bottom end of the through hole 72, sealing the bottom end of the exhaust hole 21. The exhaust cylinder 71 is also provided with an exhaust channel 77, which is located outside the through hole 72 and the outer end of the exhaust channel 77 is connected to the outside, while the inner end of the exhaust channel 77 is sealed. A plurality of connecting holes 78 are provided axially between the through hole 72 and the exhaust channel 77. The connecting holes 78 are inclined, with the end of the connecting hole 78 connected to the through hole 72 being higher than the end of the connecting hole 78 connected to the exhaust channel 77.

[0045] During injection molding, high-temperature and high-pressure gas is generated inside the mold cavity. This gas pushes the plug 73 upward within the through hole 72, allowing it to enter the through hole 72 and then through the connecting hole 78 into the exhaust channel 77. From there, the gas is discharged upwards to the outside of the mold. At this time, the compression spring 76 is compressed. After the high-temperature and high-pressure gas is discharged, the compression spring 76 resets the plug, sealing the exhaust hole 21. It should be noted that the inclined connecting hole 78, with its higher end near the through hole 72, makes it difficult for external gas to enter the through hole 72.

[0046] As an example, refer to Figure 4 At least one air inlet baffle is provided inside the connecting hole 78. The air inlet baffle includes a first baffle 781 and a second baffle 782. One end of the first baffle 781 is fixed to the lower wall of the connecting hole 78, and the other end extends to the middle of the connecting hole 78. One end of the second baffle 782 is hinged to the upper wall of the connecting hole 78, and the other end extends to the middle of the connecting hole 78 and overlaps the suspended end of the second baffle 782. With the above structure, when the high-pressure and high-temperature gas inside the cavity enters the connecting hole 78, it can push the second baffle 782 to rotate, thereby venting the gas from the gap to the exhaust channel 77. When external gas enters the connecting hole 78, because the second baffle 782 overlaps the first baffle 781, the first baffle 781 limits the movement of the second baffle 782, and the gas cannot push the second baffle 782 to move, thus preventing it from entering the connecting hole 72. This effectively seals off external gas.

[0047] As an example, the exhaust cylinder 71 is stepped, with its larger diameter end located outside the exhaust hole 21 and sealed to the end of the exhaust hole 21, such as by embedding a sealing ring on the contact surface to improve the sealing effect at the exhaust hole 21.

[0048] In the embodiments of this application, reference is made to Figure 1 and Figure 5 The lower mold 3 has multiple ejector holes 31 spaced apart at the bottom of its cavity. Each ejector hole 31 has a conical sealing section 311 near one end of the cavity. The ejection mechanism 5 includes an elastic drive assembly and multiple ejector rods 51 connected to the elastic drive assembly. Each ejector rod 51 passes through one of the ejector holes 31, and one end of each ejector rod 51 has a conical mating part 511 that matches the conical sealing section 311. Under the action of high-temperature, high-pressure gas within the cavity or under the action of the elastic drive assembly, the conical mating part 511 of the ejector rod 51 can press against the conical sealing section 311 of the ejector hole 31, thereby forming a conical sealing surface, improving the sealing effect at the ejector hole 31, and preventing leakage of the injection molding compound.

[0049] As an example, the lower mold 3 has a base 11 at its bottom and a cavity 32 inside. The driving assembly includes a telescopic cylinder 52, a top plate 53, and multiple elastic columns 54. The top plate 53 is movably disposed within the cavity 32. Multiple ejector rods 51 are spaced apart and connected to the top of the top plate 53. Multiple elastic columns 54 are spaced apart and connected to the bottom of the top plate 53 and the bottom of the cavity 32. The telescopic cylinder 52 passes through the base 11 and the lower mold 3 and is connected to the center of the bottom of the top plate 53. The telescopic cylinder 52 drives the top plate 53 to move upward, and the top plate 53 drives the multiple ejector rods 51 to move upward synchronously, so that the product is subjected to uniform force and the product is stably ejected. When the telescopic cylinder 52 moves downward, the top plate 53 is reset under the action of the elastic columns 54 and drives the ejector rods 51 to move downward, so that its conical mating part 511 is pressed against the conical sealing section 311.

[0050] As an example, a sealing ring 312 is annularly embedded at the end of the conical sealing section 311 away from the cavity to assist in sealing the ejector hole 31 and further improve the sealing effect.

[0051] As an example, the taper of the conical sealing section 311 is 1°-3°.

[0052] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0053] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0054] The above provides a detailed description of a high-sealing injection mold provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A high-sealing injection mold, comprising an upper mold and a lower mold arranged opposite each other on a mounting frame, wherein the top of the upper mold is connected to a hydraulic cylinder disposed on the mounting frame, and the lower mold is provided with an ejection mechanism, characterized in that, The upper mold and the lower mold have matching conical surfaces on their cavity edges, and sealing strips and sealing grooves are respectively provided on the two conical surfaces; wherein, the conical surface of the lower mold expands outward toward the cavity. The upper mold has an exhaust hole at the top that communicates with the cavity of the upper mold, and an exhaust sealing structure is provided inside the exhaust hole; the lower mold has multiple ejection holes at intervals at the bottom of the cavity, and a conical sealing section is provided at one end of the ejection hole near the cavity. The ejection mechanism includes an elastic drive assembly and a plurality of ejector rods connected to the elastic drive assembly. The plurality of ejector rods are respectively inserted through the plurality of ejection holes, and one end of each ejector rod is provided with a tapered mating part adapted to the tapered sealing section.

2. The high-sealing injection mold according to claim 1, characterized in that, The sealing groove is a curved groove inclined along a conical surface, and the sealing strip is shaped to fit the sealing groove.

3. The high-sealing injection mold according to claim 2, characterized in that, The taper of the conical surface is 0.5°-1.5°.

4. The high-sealing injection mold according to claim 1, characterized in that, The exhaust sealing structure includes an exhaust cylinder body that is sealed in the exhaust hole, and a through hole is formed in the middle of the exhaust cylinder body; a plug block is movably inserted in the through hole, and a fixed rod is connected to the end of the plug block away from the cavity; an adjusting block is inserted at the outer end of the through hole, and the adjusting block is threaded to the outside of the fixed rod; a compression spring abuts between the plug block and the adjusting block. The exhaust cylinder body is also provided with an exhaust channel, which is located outside the through hole and the outer end of the exhaust channel is connected to the outside, while the inner end of the exhaust channel is sealed. Multiple connecting holes are provided axially between the through hole and the exhaust channel; the connecting holes are inclined, with the end of the connecting hole connected to the through hole being higher than the end of the connecting hole connected to the exhaust channel.

5. The high-sealing injection mold according to claim 4, characterized in that, At least one air intake baffle is provided in the connecting hole, and the air intake baffle includes a first baffle and a second baffle. One end of the first baffle is fixed to the lower wall of the connecting hole, and the other end extends to the middle of the connecting hole; One end of the second baffle is hinged to the upper wall of the connecting hole, and the other end extends to the middle of the connecting hole and overlaps the suspended end of the second baffle.

6. The high-sealing injection mold according to claim 4, characterized in that, The exhaust cylinder is stepped, with its larger diameter end located outside the exhaust port and sealed to the end of the exhaust port.

7. The high-sealing injection mold according to claim 1, characterized in that, The bottom of the lower mold is provided with a base, and a cavity is opened inside the lower mold; The drive assembly includes a telescopic cylinder, a top plate, and multiple elastic columns. The top plate is movably disposed within the cavity. The multiple push rods are spaced apart and connected to the top of the top plate. The multiple elastic columns are spaced apart and connected to the bottom of the top plate and the bottom of the cavity. The telescopic cylinder passes through the base and the lower mold and is connected to the center of the bottom of the top plate.

8. The high-sealing injection mold according to claim 1, characterized in that, The taper of the conical sealing section is 1°-3°.

9. The high-sealing injection mold according to claim 8, characterized in that, The tapered sealing section has a sealing ring embedded at the end furthest from the cavity.

10. The high-sealing injection mold according to claim 1, characterized in that, The surface of the conical surface is coated with a nanocomposite coating.

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