Injection mold

Abstract

The utility model relates to the technical field of injection molds, and discloses an injection mold which comprises a front inner mold, a main injection molding channel, at least two cavities and a rotating body, and the front inner mold is used for being fixedly connected with an injection molding machine; the main injection molding channel and the at least two cavities are arranged on the front inner mold; the rotating body is rotatably arranged on the front inner mold and is positioned between the main injection molding channel and the at least two cavities; at least three circulation channels are formed in the rotating body, and the rotating body is provided with a communicating position for communicating the main injection molding channel with the at least one cavity through the at least three circulation channels and a disconnecting position for disconnecting the main injection molding channel with the at least two cavities; according to the utility model, the quantity of injection molding cavities can be adjusted and controlled, the injection molding of the cavities with abnormal quality is blocked, the output of defective products is avoided, and the waste of injection molding raw materials is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold. Background Art

[0002] In the field of injection molding, in order to improve production efficiency, a one-mold multi-cavity injection mold is usually used to produce medium and small plastic parts. A one-mold multi-cavity injection mold means that a mold has multiple different cavities, which can simultaneously perform injection molding of multiple products, especially when producing some seals, which can effectively improve the efficiency of injection molding production. However, due to the special structure of some products themselves, sometimes the quality of the cavity with a certain number of holes may be abnormal, but due to the long mold maintenance cycle and the urgent product delivery demand, the production cannot be stopped, so the mold cannot be removed for maintenance. At this time, the cavity with abnormal quality continues to work, which is easy to cause the output of defective products and waste of injection molding materials. Utility Model Content

[0003] In view of this, the utility model provides an injection mold to solve the problem that a cavity with abnormal quality continues to work, which easily causes the output of defective products and waste of injection molding materials.

[0004] In the first aspect, the utility model provides an injection mold, comprising a front inner mold, a main injection channel, at least two cavities and a rotating body, wherein the front inner mold is used to be fixedly connected to an injection molding machine; the main injection channel and at least two cavities are both arranged on the front inner mold; the rotating body is rotatably arranged on the front inner mold and is located between the main injection channel and at least two cavities; at least three circulation channels are provided on the rotating body, and the rotating body has a connecting position for connecting the main injection channel and at least one cavity through at least three circulation channels, and a disconnecting position for disconnecting the main injection channel and at least two cavities.

[0005] Beneficial effect: By setting up a rotating body, the connection or disconnection between the main injection channel and at least two cavities of a single-mold multi-cavity injection mold can be conveniently controlled. When the rotating body is in the connected position, it includes two circulation channels respectively connecting the main injection channel and a single-way position of a cavity, and at least three circulation channels respectively connecting the main injection channel and the multi-way position of at least two cavities, thereby realizing the connection between the main injection channel and one or at least two cavities; when the rotating body is in the disconnected position, the connection between at least two cavities of the main injection channel can be disconnected, thereby realizing the adjustment and control of the number of cavities for injection molding, blocking the injection molding of cavities with abnormal quality, avoiding the output of defective products, reducing the waste of injection molding raw materials, improving product yield and production efficiency, and ensuring the normal operation of product scheduling, production and delivery.

[0006] In an optional embodiment, a positioning structure is further included, and the positioning structure is used to fix the rotating body in the connected position or the disconnected position.

[0007] Beneficial effect: By setting a positioning structure to fix the rotating body, the rotating body can be ensured to be fixed in a connected position or a disconnected position, so that the structure of the rotating body is more stable when the main injection channel and at least one cavity are connected, or the main injection channel and at least two cavities are disconnected.

[0008] In an optional embodiment, the positioning structure includes at least four positioning slots and a ball screw; at least four positioning slots are arranged on the side of the rotating body away from the circulation channel, and are arranged at circumferential intervals around the rotating body; one end of the ball screw is fixedly connected to the front inner mold, and the other end is used to engage with different positioning slots.

[0009] Beneficial effect: By setting a ball screw and at least four positioning slots, the rotation direction of the rotating body can be adjusted and selected; and when the ball screw enters the positioning slot, an acoustic vibration will be generated, which is convenient for the control personnel to judge the angle of rotation of the rotating body.

[0010] In an optional embodiment, a rotating structure is further included, and an adjustment hole is provided on the front inner mold. One end of the rotating structure passes through the adjustment hole and is detachably connected to the rotating body, and the other end is a driving end.

[0011] Beneficial effects: by providing a rotating structure, it is convenient for the control personnel to control the rotation direction of the rotating body; by providing a direction adjustment hole on the front inner mold, the rotating structure passes through the direction adjustment hole to achieve a detachable connection with the rotating body.

[0012] In an optional embodiment, a polygonal groove is provided on the side of the rotating body facing away from the circulation channel, and the rotating structure includes a polygonal rod and a rotating rod; one end of the polygonal rod passes through the adjustment hole and is engaged in the polygonal groove, and the other end is the driving end; the rotating rod is arranged perpendicular to the polygonal rod and is fixedly connected to the driving end.

[0013] Beneficial effects: Through the cooperation of the polygonal rod and the polygonal groove, the purpose of driving the rotating body to rotate by the rotating structure is achieved; through the setting of the rotating rod, it is convenient for the control personnel to control the rotation of the rotating structure; and because the polygonal groove is arranged on the side of the rotating body away from the circulation channel, compared with the polygonal groove being arranged on the circulation channel, it can not only reduce the waste of injection molding raw materials, but also avoid the risk of mucosa when the rotating structure performs rotational control on the rotating body; and it can ensure that the rotating structure is located on the side of the front inner mold away from the injection molding machine, so that the control personnel have a wider operating space and operating field of view.

[0014] In an optional embodiment, it also includes a first groove and a first pressure plate; the first groove is arranged on the front inner mold; the first pressure plate is fixedly connected in the first groove and is provided with a connecting hole; the rotating body includes a main body section and a limiting protrusion, the limiting protrusion protrudes from the outer periphery of one end of the main body section, the limiting protrusion is rotatably arranged between the bottom of the first groove and the first pressure plate, and the main body section is rotatably connected in the connecting hole.

[0015] Beneficial effects: by setting the first pressure plate, the main body section and the limiting protrusion on the rotating body, the rotating body can be fixed on the front inner mold while ensuring the free rotation of the rotating body, and the installation and disassembly of the rotating body can be facilitated; by setting the first groove, the limiting protrusion of the rotating body can be set inside the front inner mold, so as to avoid the limiting protrusion occupying the space on the surface of the front inner mold and affecting the design of other functional structures on the surface of the front inner mold; and because the surface of the front inner mold facing away from the main injection channel is provided with a cavity sealing surface, the design of the first groove can reduce the spacing between multiple cavity sealing surfaces, thereby reducing the volume of the front inner mold, making the various functional structures of the injection mold more compact and the overall appearance small, which can effectively reduce the manufacturing cost of the injection mold, and can shorten the distance between the main injection channel and the cavity, reducing the extra consumption of plastic raw materials.

[0016] In an optional embodiment, the first pressing plate is provided with at least three connecting grooves spaced apart along the circumferential direction of the connecting hole, and the connecting grooves are used to connect the circulation channel with the mold cavity.

[0017] Beneficial effect: When the main body section on the rotating body is arranged in the communicating hole, by arranging the communicating groove, it can be ensured that the flow channel is connected with the cavity when the rotating body is in the communicating position.

[0018] In an optional embodiment, the outer diameter of the rotating body is larger than the diameter of the connecting groove.

[0019] Beneficial effect: It is ensured that the connecting groove connected with the main injection channel or the cavity can be completely blocked when the rotating body is in the disconnected position, thereby avoiding the overflow of the injection raw material.

[0020] In an optional embodiment, it also includes at least two second grooves and at least two second pressure plates; at least two second grooves are arranged on the front inner mold, connected to the first groove, and respectively arranged in one-to-one correspondence with at least two cavities; at least two second pressure plates are respectively connected to at least two second grooves, and a limiting groove is provided on one side of the second pressure plate close to the bottom of the second groove; both sides of the first pressure plate are protruding with limiting blocks, and the limiting blocks are limitedly matched with the limiting grooves.

[0021] Beneficial effect: The first pressing plate can be installed and disassembled on the front inner mold by setting the limit block on the first pressing plate and the upper limit groove on the second pressing plate.

[0022] In an optional embodiment, at least two of the cavities form a group of cavity units, a group of cavity units is respectively provided at both ends of the main injection channel, and each group of cavity units is correspondingly provided with a rotating body.

[0023] Beneficial effect: By setting a rotating body corresponding to each group of cavity units, it is possible to achieve the injection molding production of more products and to block the injection molding of cavities with abnormal quality, thereby avoiding the output of defective products, reducing the waste of injection molding raw materials, improving product yield and production efficiency, and ensuring the normal operation of product scheduling, production and delivery. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the related technologies, the drawings required for use in the specific implementation methods or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 It is a partial structural exploded diagram of an injection mold according to an embodiment of the utility model;

[0026] Figure 2 It is a partial structural schematic diagram of an injection mold according to an embodiment of the utility model;

[0027] Figure 3 It is a structural schematic diagram of a rotating body in an embodiment of the utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the connection between the rotating body and the ball screw in an embodiment of the utility model;

[0029] Figure 5 It is a structural schematic diagram of the rotating structure of an embodiment of the utility model;

[0030] Figure 6 This is a schematic structural diagram of the first pressing plate in an embodiment of the utility model;

[0031] Figure 7 This is a schematic structural diagram of the connection between the rotating body and the first pressing plate of an embodiment of the utility model;

[0032] Figure 8 This is a schematic diagram of the structure in which the first cavity is connected to the main injection channel in an embodiment of the utility model;

[0033] Fig. 9 This is a schematic diagram of the structure in which the second cavity of the embodiment of the utility model is connected with the main injection channel;

[0034] Fig.10 This is a schematic diagram of the structure in which the third cavity of the embodiment of the utility model is connected with the main injection channel;

[0035] Fig.11 This is a schematic structural diagram of a fourth embodiment of the utility model in which the mold cavity is connected to the main injection channel;

[0036] Fig.12 This is a schematic diagram of the overall structure of the injection mold of an embodiment of the utility model;

[0037] Fig.13 A cross-sectional view of an injection mold according to an embodiment of the utility model;

[0038] Fig.14 for Fig.13 A is a partial enlarged schematic diagram of the middle part.

[0039] Description of reference numerals:

[0040] 1. Front inner mold; 101. Adjustment hole; 102. Thread groove; 2. Main injection channel; 3. Rotating body; 301. Circulation channel; 302. Polygonal groove; 303. Main section; 304. Limiting convex part; 4. Positioning structure; 401. Positioning groove; 402. Ball screw; 5. Rotating structure; 501. Polygonal rod; 502. Rotating rod; 6. First groove; 7. First pressure plate; 701. Communication hole; 702. Communication groove; 703. Limiting block; 8. Second groove; 9. Second pressure plate; 901. Limiting groove; 10. Front mold fixing plate; 11. Stripping plate; 12. Front mold plate; 13. Rear mold plate; 14. Mold foot; 15. Upper ejector plate; 16. Lower ejector plate; 17. Rear mold fixing plate. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0042] Combine the following Figures 1 to 14 , describing an embodiment of the utility model.

[0043] According to an embodiment of the utility model, on the one hand, an injection mold is provided, including a front inner mold 1, a main injection channel 2, at least two cavities and a rotating body 3, the front inner mold 1 is used to be fixedly connected to an injection molding machine; the main injection channel 2 and the at least two cavities are both arranged on the front inner mold 1; the rotating body 3 is rotatably arranged on the front inner mold 1, and is located between the main injection channel 2 and the at least two cavities; at least three circulation channels 301 are arranged on the rotating body 3, and the rotating body 3 has a connecting position connecting the main injection channel 2 and at least one cavity through the at least three circulation channels 301, and a disconnecting position disconnecting the main injection channel 2 and the at least two cavities.

[0044] By setting the rotating body 3, the connection or disconnection between the main injection channel 2 and at least two cavities of a single-mold multi-cavity injection mold can be conveniently controlled. When the rotating body 3 is in the connected position, it includes two circulation channels 301 respectively connecting the single-pass position of the main injection channel 2 and one cavity, and at least three circulation channels 301 respectively connecting the main injection channel 2 and the multi-pass position of at least two cavities, thereby realizing the connection between the main injection channel 2 and one or at least two cavities; when the rotating body 3 is in the disconnected position, the connection between at least two cavities of the main injection channel 2 can be disconnected, thereby realizing the adjustment and control of the number of cavities for injection molding, blocking the injection molding of cavities with abnormal quality, avoiding the output of defective products, reducing the waste of injection molding raw materials, improving product yield and production efficiency, and ensuring the normal operation of product scheduling, production and delivery.

[0045] In one embodiment, a positioning structure 4 is further included, and the positioning structure 4 is used to fix the rotating body 3 in a connected position or a disconnected position.

[0046] By setting a positioning structure 4 to fix the rotating body 3, it can be ensured that the rotating body 3 is fixed in the connected position or the disconnected position, so that the rotating body 3 is more stable when connecting the main injection channel 2 and at least one cavity, or disconnecting the main injection channel 2 and at least two cavities.

[0047] In one embodiment, the positioning structure 4 includes at least four positioning grooves 401 and ball screws 402; at least four positioning grooves 401 are arranged on the side of the rotating body 3 away from the circulation channel 301, and are arranged at circumferential intervals around the rotating body 3; one end of the ball screw 402 is fixedly connected to the front inner mold 1, and the other end is used to clamp with different positioning grooves 401.

[0048] By providing a ball screw 402 and at least four positioning slots 401, the rotation direction of the rotating body 3 can be adjusted and selected; and when the ball screw 402 enters the positioning slot 401, a sound vibration sensation is generated, which is convenient for the control personnel to judge the rotation angle of the rotating body 3.

[0049] In a specific implementation, a thread groove 102 is provided on the front inner mold 1 , and the ball screw 402 is threadedly connected to the thread groove 102 .

[0050] Specifically, the direction adjustment hole 101 and the thread groove 102 are arranged at intervals.

[0051] In one embodiment, a rotating structure 5 is further included. An adjustment hole 101 is provided on the front inner mold 1. One end of the rotating structure 5 passes through the adjustment hole 101 and is detachably connected to the rotating body 3, and the other end is a driving end.

[0052] The rotating structure 5 is provided to facilitate the control personnel to control the rotation direction of the rotating body 3 ; and the direction adjustment hole 101 is provided on the front inner mold 1 , so that the rotating structure 5 passes through the direction adjustment hole 101 to achieve a detachable connection with the rotating body 3 .

[0053] In one embodiment, a polygonal groove 302 is provided on the side of the rotating body 3 facing away from the circulation channel 301, and the rotating structure 5 includes a polygonal rod 501 and a rotating rod 502; one end of the polygonal rod 501 passes through the adjustment hole 101 and is clamped in the polygonal groove 302, and the other end is the driving end; the rotating rod 502 is arranged perpendicular to the polygonal rod 501 and is fixedly connected to the driving end.

[0054] Through the cooperation of the polygonal rod 501 and the polygonal groove 302, the purpose of the rotating structure 5 driving the rotating body 3 to rotate is achieved; through the setting of the rotating rod 502, it is convenient for the control personnel to control the rotation of the rotating structure 5; and because the polygonal groove 302 is arranged on the side of the rotating body 3 away from the circulation channel 301, compared with the polygonal groove 302 being arranged on the circulation channel 301, it can not only reduce the waste of injection molding raw materials, but also avoid the risk of mucous membrane when the rotating structure 5 performs rotational control on the rotating body 3; and it can ensure that the rotating structure 5 is located on the side of the front inner mold 1 away from the injection molding machine, so that the control personnel have a wider operating space and operating field of view.

[0055] In a specific embodiment, the injection mold further includes a front mold fixing plate 10, a stripping plate 11, a front mold plate 12, a rear mold plate 13, a mold foot 14, an upper ejector plate 15, a lower ejector plate 16, and a rear mold fixing plate 17; the front mold fixing plate 10 is fixedly connected to the injection molding machine; the stripping plate 11 is fixedly connected to the side of the front mold fixing plate 10 away from the injection molding machine, and is used to strip the water outlet and the product; the front mold plate 12 is fixedly connected to the side of the stripping plate 11 away from the front mold fixing plate 10, and the front inner mold 1 is fixedly connected to the front mold fixing plate 10. The rear template 13 is connected to the side of the front template 12 where the front inner mold 1 is provided; the mold foot 14 is fixedly connected to the side of the rear template 13 away from the front template 12, and while supporting the rear template 13, it also leaves an ejection space; the upper ejector plate 15 is located on the side of the rear template 13 away from the front template 12, and is fixedly connected to the ejector pin of the ejection system, and the lower ejector plate 16 is fixedly connected below the upper ejector plate 15; the rear mold fixing plate 17 is located below the lower ejector plate 16, and is fixedly connected to the mold foot 14.

[0056] In one embodiment, it also includes a first groove 6 and a first pressure plate 7; the first groove 6 is arranged on the front inner mold 1; the first pressure plate 7 is fixedly connected in the first groove 6 and is provided with a connecting hole 701; the rotating body 3 includes a main body section 303 and a limiting protrusion 304, the limiting protrusion 304 protrudes from the outer periphery of one end of the main body section 303, the limiting protrusion 304 is rotatably arranged between the groove bottom of the first groove 6 and the first pressure plate 7, and the main body section 303 is rotatably connected in the connecting hole 701.

[0057] By setting the first pressure plate 7 and the main section 303 and the limiting protrusion 304 on the rotating body 3, the rotating body 3 can be fixed on the front inner mold 1 while ensuring the free rotation of the rotating body 3, and the installation and disassembly of the rotating body 3 are convenient; by setting the first groove 6, the limiting protrusion 304 of the rotating body 3 can be set inside the front inner mold 1, so as to avoid the limiting protrusion 304 occupying the space on the surface of the front inner mold 1 and affecting the design of other functional structures on the surface of the front inner mold 1; and because the surface of the front inner mold 1 facing away from the main injection channel 2 is provided with a cavity sealing surface, the design of the first groove 6 can reduce the spacing between multiple cavity sealing surfaces, thereby reducing the volume of the front inner mold 1, making the various functional structures of the injection mold more compact and the overall appearance small, which can effectively reduce the manufacturing cost of the injection mold, and can shorten the distance between the main injection channel 2 and the cavity, reducing the extra consumption of plastic raw materials.

[0058] In one embodiment, the first pressing plate 7 is provided with at least three connecting grooves 702 spaced apart along the circumferential direction of the connecting hole 701 , and the connecting grooves 702 are used to connect the flow channel 301 with the cavity.

[0059] When the main body section 303 on the rotating body 3 is arranged in the communicating hole 701, by providing the communicating groove 702, it is possible to ensure that the flow channel 301 is connected with the cavity when the rotating body 3 is in the communicating position.

[0060] In a specific embodiment, the outer diameter of the rotating body 3 is larger than the diameter of the connecting groove 702, ensuring that the rotating body 3 can completely block the connecting groove 702 connected to the main injection channel 2 or the cavity when in the disconnected position to prevent the injection material from overflowing.

[0061] In a specific embodiment, the rotating body 3 , the first pressing plate 7 and the first groove 6 are all sealed to prevent the injection material from leaking into the gap when flowing through the main injection channel 2 , the connecting groove 702 and the circulation channel 301 .

[0062] In one embodiment, it also includes at least two second grooves 8 and at least two second pressure plates 9; at least two second grooves 8 are arranged on the front inner mold 1, connected to the first groove 6, and respectively arranged in one-to-one correspondence with at least two cavities; at least two second pressure plates 9 are respectively connected to at least two second grooves 8, and a limiting groove 901 is provided on one side of the second pressure plate 9 close to the bottom of the second groove 8; both sides of the first pressure plate 7 are protruding with limiting blocks 703, and the limiting blocks 703 are limitedly matched with the limiting grooves 901.

[0063] By providing the limiting block 703 on the first pressing plate 7 and the limiting groove 901 on the second pressing plate 9 , the first pressing plate 7 can be installed and removed from the front inner mold 1 .

[0064] In a specific implementation, a sub-injection channel is provided on the second pressing plate 9 , and the communication groove 702 and the cavity can be connected by providing the sub-injection channel.

[0065] In a specific embodiment, the first pressing plate 7 and the second pressing plate 9 are sealed and matched to prevent the injection molding raw material from leaking into the gap between the first pressing plate 7 and the second pressing plate 9 during the process of flowing through the connecting groove 702 and the sub-injection molding channel.

[0066] In a specific embodiment, the second pressing plate 9 is detachably connected to the second groove 8 .

[0067] Specifically, a first threaded hole is provided on the second pressing plate 9 , a second threaded hole is provided at the bottom of the second groove 8 , and a fastener such as a screw passes through the first threaded hole and is threadedly connected to the second threaded hole.

[0068] Specifically, three first threaded holes are provided on the second pressing plate 9 , and the three first threaded holes are arranged at intervals around the second pressing plate 9 .

[0069] In one embodiment, at least two cavities form a group of cavity units, a group of cavity units is respectively provided at both ends of the main injection channel 2 , and each group of cavity units is correspondingly provided with a rotating body 3 .

[0070] By providing a rotating body 3 corresponding to each group of cavity units, it is possible to realize the injection molding production of more products and to block the injection molding of cavities with abnormal quality, thereby avoiding the output of defective products, reducing the waste of injection molding raw materials, improving product yield and production efficiency, and ensuring the normal operation of product scheduling, production and delivery.

[0071] In a specific embodiment, each group of cavity units includes two cavities. The two cavities are symmetrically arranged on both sides of the main injection channel 2; four second pressing plates 9 are provided, and each sub-injection channel on the second pressing plate 9 is connected to a corresponding cavity.

[0072] In one implementation of the present embodiment, the three circulation channels 301 of one rotating body 3 are disconnected from the main injection channel 2 and the two cavities and are in a disconnected position; the two circulation channels 301 of the other rotating body 3 are respectively connected to the main injection channel 2 and one cavity and are in a single-pass position, and one cavity can work normally. In another implementation of the present embodiment, the two rotating bodies 3 are in a single-pass position, and the two circulation channels 301 of each rotating body 3 are respectively connected to the main injection channel 2 and one cavity, and the two cavities can work normally. In another implementation of the present embodiment, the two circulation channels 301 of one rotating body 3 are respectively connected to the main injection channel 2 and one cavity and are in a single-pass position; the three circulation channels 301 of the other rotating body 3 are respectively connected to the main injection channel 2 and the two cavities and are in a multi-pass position, and the three cavities can work normally. In another implementation of the present embodiment, the two rotating bodies 3 are in a multi-pass position, and the three circulation channels 301 of each rotating body 3 are respectively connected to the main injection channel 2 and the two cavities, and the four cavities can work normally.

[0073] In a specific implementation, the ball screw 402 is threadedly connected in the threaded groove 102; the rotating body 3 is placed above the ball screw 402; the first pressure plate 7 is placed in the first groove 6, and the limiting protrusion 304 is fixed between the first pressure plate 7 and the first groove 6; the second pressure plate 9 is placed in the second groove 8, and the limiting block 703 is limited and fixed by the limiting groove 901; fasteners such as screws are passed through the first threaded hole and threadedly connected to the second threaded hole to fix the second pressure plate 9.

[0074] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. An injection mold, characterized in that: include: A front inner mold (1) is used for fixedly connecting to an injection molding machine; A main injection channel (2) is arranged on the front inner mold (1); At least two cavities are arranged on the front inner mold (1); A rotating body (3) is rotatably arranged on the front inner mold (1) and is located between the main injection channel (2) and at least two of the cavities; at least three circulation channels (301) are arranged on the rotating body (3), and the rotating body (3) has a connecting position for connecting the main injection channel (2) and at least one of the cavities through the at least three circulation channels (301), and a disconnecting position for disconnecting the main injection channel (2) and at least two of the cavities.

2. The injection mold according to claim 1, characterized in that: It also comprises a positioning structure (4), wherein the positioning structure (4) is used to fix the rotating body (3) at the connected position or the disconnected position.

3. The injection mold according to claim 2, characterized in that: The positioning structure (4) comprises: At least four positioning grooves (401) are arranged on a side of the rotating body (3) away from the circulation channel (301) and are arranged at intervals in the circumferential direction around the rotating body (3); A ball screw (402) has one end fixedly connected to the front inner mold (1) and the other end used for snapping into different positioning grooves (401).

4. The injection mold according to claim 1, characterized in that: It also comprises a rotating structure (5), wherein the front inner mold (1) is provided with an adjustment hole (101), one end of the rotating structure (5) passes through the adjustment hole (101) and is detachably connected to the rotating body (3), and the other end is a driving end.

5. The injection mold according to claim 4, characterized in that: A polygonal groove (302) is provided on a side of the rotating body (3) facing away from the circulation channel (301), and the rotating structure (5) comprises: A polygonal rod (501), one end of which passes through the direction adjustment hole (101) and is clamped in the polygonal groove (302), and the other end of which is the driving end; The rotating rod (502) is arranged perpendicular to the polygonal rod (501) and is fixedly connected to the driving end.

6. The injection mold according to any one of claims 1 to 5, characterized in that Also includes: A first groove (6), wherein the first groove (6) is arranged on the front inner mold (1); A first pressing plate (7) is fixedly connected in the first groove (6) and is provided with a communicating hole (701); The rotating body (3) comprises a main body section (303) and a limiting protrusion (304), wherein the limiting protrusion (304) is protrudingly arranged on the outer periphery of one end of the main body section (303), and the limiting protrusion (304) is rotatably arranged between the bottom of the first groove (6) and the first pressure plate (7), and the main body section (303) is rotatably connected in the connecting hole (701).

7. The injection mold according to claim 6, characterized in that: The first pressing plate (7) is provided with at least three connecting grooves (702) spaced apart along the circumferential direction of the connecting hole (701), and the connecting grooves (702) are used to connect the circulation channel (301) with the mold cavity.

8. The injection mold according to claim 7, characterized in that: The outer diameter of the rotating body (3) is greater than the diameter of the connecting groove (702).

9. The injection mold according to claim 8, characterized in that: Also includes: At least two second grooves (8) are arranged on the front inner mold (1), are communicated with the first groove (6), and are respectively arranged in one-to-one correspondence with at least two of the mold cavities; At least two second pressing plates (9) are respectively connected to at least two of the second grooves (8); a limiting groove (901) is provided on one side of the second pressing plate (9) close to the bottom of the second groove (8); Limit blocks (703) are protruding from both sides of the first pressing plate (7), and the limit blocks (703) are in position-limiting cooperation with the limit grooves (901).

10. The injection mold according to any one of claims 7 to 9, characterized in that At least two of the cavities form a group of cavity units, a group of cavity units is respectively provided at both ends of the main injection channel (2), and each group of cavity units is correspondingly provided with a rotating body.

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