Multi-cavity injection mold

Abstract

The invention relates to the technical field of plastic state forming, and discloses a multi-cavity injection mold which comprises a fixed mold, a movable mold, a mold core and an insert, the insert comprises a cigarette holder mold body and a mold base, the cigarette holder mold body comprises a cigarette cartridge bin molding part and a curved-surface suction nozzle shell molding part, a cigarette cartridge bin water path is formed in the cigarette cartridge bin molding part, and a curved-surface suction nozzle shell is formed in the curved-surface suction nozzle shell molding part; a curved-surface suction nozzle waterway is formed in the curved-surface suction nozzle shell molding part; the curved-surface suction nozzle water path comprises a curved-surface suction nozzle water inlet water path and a connecting part which is vertically arranged on the cigarette cartridge bin molding part and the curved-surface suction nozzle shell molding part; the curved-surface suction nozzle water outlet waterway is vertically arranged at the connecting part of the cigarette cartridge bin molding part and the curved-surface suction nozzle shell molding part; the linear water path is positioned in the curved-surface suction nozzle shell molding part and is close to one side edge of the smoke cartridge molding part; and the elliptic arc waterway I is positioned in the curved surface suction nozzle shell molding part. The flow speed of cooling water in a narrow water path is slowed down, the heat exchange time is prolonged under the condition of the same water volume of the cooling water, resource waste is reduced, and the cooling efficiency of the insert is improved.

Description

Technical Field

[0001] The present application relates to the technical field of plastic state molding, and in particular to a multi-cavity injection mold. Background Art

[0002] The processing method of electronic cigarette shells is often injection molding. The materials of electronic cigarette plastic shells are mostly high-temperature materials. The temperature of high-temperature materials can easily cause problems in injection molding. In the injection molding process, the main problem is that the mold cooling effect is not ideal. Therefore, the cooling water channel design on the electronic cigarette inserts in the injection mold is particularly important. The cooling water channel can quickly take away the heat, so that the cooling efficiency of the mold can be greatly improved, the dimensional accuracy of the product is also improved, and the yield rate will be guaranteed.

[0003] However, in the process of implementing relevant technical solutions, it was found that at least the following technical problems exist: there are "innate" problems in the design of the electronic cigarette shell insert. The size of the electronic cigarette shell insert is small, and the length of the water channel is easily limited in the limited space, which will cause the cooling water to flow out of the insert quickly. The effect of cooling water in taking away heat is poor, and for multi-cavity injection molds, multiple cavity injection molding will be carried out at the same time, and the overall mold temperature will increase. Therefore, for the electronic cigarette mold, the simultaneous injection molding of multiple cavities and the space limitation of the insert water channel design both affect the cooling efficiency of the mold, resulting in a longer cooling time. Summary of the invention

[0004] The present application solves the technical problems in the prior art of simultaneous multi-cavity injection molding and space limitations in the design of insert water channels, which lead to reduced cooling efficiency, by providing a multi-cavity injection mold. The application achieves the goal of slowing down the flow rate of cooling water in narrow water channels, extending the heat exchange time under the same cooling water volume, reducing resource waste, and improving insert cooling efficiency.

[0005] The present application provides a multi-cavity injection mold, comprising a fixed mold, a movable mold, a mold core and an insert, wherein the insert is installed on the mold core, the insert comprises a plurality of cigarette holder mold bodies and a mold base for supporting the plurality of cigarette holder mold bodies, the cigarette holder mold body comprises a cigarette cartridge magazine mold part and a curved suction nozzle shell mold part, a cigarette cartridge magazine water path is formed in the cigarette cartridge magazine mold part, and a curved suction nozzle shell mold part is formed in the curved suction nozzle water path; the curved suction nozzle water path comprises: a curved suction nozzle water inlet water path, which is vertically arranged at the connecting part of the cigarette cartridge magazine mold part and the curved suction nozzle shell mold part, and is connected to the upstream of the water flow in the cigarette cartridge magazine water path; a curved suction nozzle water outlet water path, which is vertically arranged at the connecting part of the cigarette cartridge magazine mold part and the curved suction nozzle shell mold part The connecting part of the surface suction nozzle shell mold part is connected with the downstream of the water flow in the water channel of the cigarette cartridge magazine; the straight water channel is located in the curved suction nozzle shell mold part close to one side of the cigarette cartridge magazine mold part, and is connected between the curved suction nozzle water inlet water channel and the curved suction nozzle water outlet water channel; the elliptical water channel 1 is located in the curved suction nozzle shell mold part, and is located on the side of the straight water channel away from the cigarette cartridge magazine mold part, both ends of the elliptical water channel 1 are connected with the straight water channel, and the angle between the water flow direction of the outlet end of the elliptical water channel 1 and the water flow direction of the straight water channel is an obtuse angle, and the angle between the water flow direction of the water inlet end of the elliptical water channel 1 and the water flow direction of the straight water channel is an acute angle.

[0006] Furthermore, the curved suction nozzle water channel also includes an elliptical water channel 2, and the elliptical water channel 2 and the elliptical water channel 1 are located on the same side of the straight water channel, both ends of the elliptical water channel 2 are connected to the straight water channel, and the angle between the water flow direction of the water inlet end of the elliptical water channel 2 and the water flow direction of the straight water channel is an acute angle, and the elliptical water channel is connected to the water outlet end of the elliptical water channel 1, and the angle between the water flow direction of the water outlet end of the elliptical water channel 2 and the water flow direction of the straight water channel is an obtuse angle.

[0007] Furthermore, the diameter of the straight water channel is larger than the diameters of the elliptical water channel one and the elliptical water channel two, and the diameter of the elliptical water channel one is equal to the diameter of the elliptical water channel two.

[0008] Furthermore, a water inlet end of the elliptical water channel 1 communicating with the straight water channel and a water inlet end of the elliptical water channel 2 communicating with the straight water channel are both formed with narrow throats.

[0009] Furthermore, the long axes of the elliptical water channel 1 and the elliptical water channel 2 are inclined toward the water outlet end of the straight water channel.

[0010] Furthermore, the straight water channel is inclined, and one end of the straight water channel connected to the water inlet water channel of the curved suction nozzle is higher than one end of the straight water channel connected to the water outlet water channel of the curved suction nozzle.

[0011] Furthermore, two water channels of the cartridge compartment are provided, and the two water channels of the cartridge compartment are respectively close to the two side walls of the plastic mold part of the cartridge compartment, and the water channels of the cartridge compartment are in an S-shaped route.

[0012] Furthermore, one end of the water channel of the cigarette cartridge magazine on one side is a water inlet end, and the other end is connected to the curved nozzle water inlet water channel in the curved nozzle water channel, and one end of the water channel of the cigarette cartridge magazine on the other side is a water outlet end, and the other end is connected to the curved nozzle water outlet water channel in the curved nozzle water channel.

[0013] One or more technical solutions provided in this application have at least the following technical effects or advantages: 1: Since the straight water channel is inclined, the inclined straight water channel helps the cooling water to form a flushing effect in the curved nozzle shell mold part, reducing the possibility of blockage in the curved nozzle water channel.

[0014] 2: Since the water flow direction at the outlet end of the elliptical water channel 1 is at an obtuse angle to the water flow direction of the straight water channel, the obtuse angle allows the cooling water flowing out of the elliptical water channel 1 to collide with the cooling water in the straight water channel when entering the straight water channel. The water flow collision will generate vortices, which will limit the flow rate at some positions of the straight water channel and the flow rate at the outlet end of the elliptical water channel 1, thereby extending the residence time of the cooling water in the straight water channel and the elliptical water channel 1, which is helpful for the heat exchange of the curved nozzle shell mold part.

[0015] 3: Since the vortex formed at the outlet end of the elliptical water channel one is downstream of the narrow throat between the elliptical water channel two and the straight water channel, the flow velocity caused by the narrow throat will increase and impact the vortex formed at the outlet end of the elliptical water channel one, weakening the clogging ability of the vortex. Therefore, the narrow throat between the elliptical water channel two and the straight water channel can also prevent the small water channel from being blocked by the vortex formation, and also help the cooling water in the straight water channel to enter the elliptical water channel two. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a multi-cavity injection mold in an embodiment of the present application; Figure 2 This is a schematic diagram of the structure of the insert in the embodiment of the present application; Figure 3 This is a schematic diagram of the structure of the cigarette holder model in the embodiment of the present application; Figure 4 for Figure 3 The cross-sectional diagram of the middle part structure mainly illustrates the structure of the curved nozzle water channel inside the curved nozzle shell mold; Figure 5 for Figure 3 The cross-sectional diagram of the middle part mainly shows the structure of the curved nozzle water channel connected to the water channel of the cartridge compartment on one side; Figure 6 for Figure 3 The cross-sectional diagram of the middle part mainly shows the structure of the curved nozzle water channel connected to the other side of the cartridge compartment water channel; In the figure: 100, fixed mold; 200, movable mold; 300, mold core; 400, insert; 4, cigarette holder mold body; 5, mold base; 401, cigarette cartridge compartment mold part; 402, curved suction nozzle shell mold part; 41, cigarette cartridge compartment water channel; 42, curved suction nozzle water channel; 421, curved suction nozzle water inlet water channel; 422, curved suction nozzle water outlet water channel; 423, straight water channel; 424, elliptical water channel one; 425, elliptical water channel two; 426, narrow throat. DETAILED DESCRIPTION

[0017] The embodiment of the present application discloses a multi-cavity injection mold, by arranging a cigarette cartridge water channel 41 and a curved suction nozzle water channel 42 in the cigarette holder mold body 4 of the mold insert 400, the flow rate in the curved suction nozzle water channel 42 changes, which has a flushing effect on the water channel, and a vortex will be formed at the connection between the elliptical water channel 1 424 and the elliptical water channel 2 425 in the curved suction nozzle water channel 42, which will prolong the residence time of the cooling water in the elliptical water channel 1 424, and help the heat exchange of the curved suction nozzle shell mold part 402, and solve the technical problems of simultaneous multi-cavity injection molding and space limitation of the water channel design of the insert 400 in the prior art, resulting in reduced cooling efficiency, and achieves the goal of slowing down the flow rate of cooling water in the narrow water channel, prolonging the heat exchange time under the same cooling water volume, reducing resource waste, and improving the cooling efficiency of the insert 400.

[0018] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0019] Reference Figure 1 and Figure 2 A multi-cavity injection mold includes a fixed mold 100, a movable mold 200, a mold core 300, and an insert 400. The mold core 300 is located between the fixed mold 100 and the movable mold 200, and the insert 400 is fixedly installed in the mold core 300. The insert 400 includes a plurality of cigarette holder mold bodies 4 and a mold base 5. The cigarette holder mold body 4 can be formed by 3D printing. The cigarette holder mold body 4 is printed on the mold base 5 by 3D printing. Multiple cigarette holder mold bodies 4 can be printed on the mold base 5 at the same time to form a multi-cavity injection molding. In a specific implementation, the mold bodies of other parts of the electronic cigarette shell can also be printed on the mold base 5. In the embodiment of the present application, the size of the curved surface part of the cigarette holder of the electronic cigarette is relatively small, which is a representative problem for the design of the water channel in the cigarette holder mold body 4. The length of the water channel is easily limited in a limited space.

[0020] Reference Figure 3 , Figure 4 as well as Figure 5The cigarette holder mold body 4 includes a cigarette cartridge magazine mold part 401 and a curved suction nozzle shell mold part 402. The two side surfaces of the curved suction nozzle shell mold part 402 are curved surfaces, and the two side surfaces of the cigarette cartridge magazine mold part 401 are vertical surfaces. The thickness of the curved suction nozzle shell mold part 402 is thinner than that of the cigarette cartridge magazine mold part 401. The shell molded by the cigarette cartridge magazine mold part 401 is used to place the cigarette cartridge of the electronic cigarette, and the shell molded by the curved suction nozzle shell mold part 402 is provided for the suction part of the mouth of the person using the electronic cigarette. A cartridge compartment water channel 41 is formed in the cartridge compartment mold part 401, and a curved nozzle water channel 42 is formed in the curved nozzle shell mold part 402, wherein the curved nozzle water channel 42 is provided with one and is located in the middle position of the curved nozzle shell mold part 402, and the cartridge compartment water channel 41 is provided with two, which are respectively close to the two side walls of the cartridge compartment mold part 401, and the cartridge compartment water channel 41 is in an S-shaped route, and the S-shaped cartridge compartment water channel 41 covers the entire side wall of the cartridge compartment mold part 401, and the cartridge compartment One end of the cartridge magazine water channel 41 on one side of the mold part 401 is connected to the cooling water source of the mold, which is used for the entry of cooling water for the cigarette holder mold body 4, and the other end is close to the curved suction nozzle shell mold part 402 and connected to the water inlet end of the curved suction nozzle water channel 42. One end of the cartridge magazine water channel 41 on the other side of the cartridge magazine mold part 401 is close to the curved suction nozzle shell mold part 402 and connected to the water outlet end of the curved suction nozzle water channel 42, and the other end is connected to the water outlet water channel of the mold, which is used to drain the cooling water in the cigarette holder mold body 4.

[0021] Reference Figure 4 , Figure 5 as well as Figure 6 The curved nozzle water path 42 includes a curved nozzle water inlet water path 421, a curved nozzle water outlet water path 422, a straight water path 423, an elliptical arc water path 1 424, an elliptical arc water path 2 425, and a narrow throat 426. The curved nozzle water inlet water path 421 is located at the connection part of the cartridge compartment mold part 401 and the curved nozzle shell mold part 402, and the curved nozzle water inlet water path 421 is vertically arranged, and the bottom end of the curved nozzle water inlet water path 421 is connected to the end of the cartridge compartment water path 41 in the upstream of the cartridge compartment mold part 401, which is far from the water inlet end (refer to Figure 5 The curved nozzle water outlet waterway 422 is also located at the connection part of the cartridge compartment mold part 401 and the curved nozzle shell mold part 402, and the curved nozzle water outlet waterway 422 is vertically arranged, and the curved nozzle water outlet waterway 422 and the curved nozzle water inlet waterway 421 are respectively located on both sides of the curved nozzle shell mold part 402 in the width direction, and the curved nozzle water outlet waterway 422 is connected to the end of the downstream cartridge compartment waterway 41 in the cartridge compartment mold part 401 away from the water outlet end (refer to Figure 6As shown). The straight waterway 423 is located in the curved nozzle shell mold part 402 near one side of the cartridge chamber mold part 401, and the straight waterway 423 is connected between the curved nozzle water inlet waterway 421 and the curved nozzle water outlet waterway 422. The straight waterway 423 is inclined, and the end of the straight waterway 423 connected to the curved nozzle water inlet waterway 421 is higher than the end of the straight waterway 423 connected to the curved nozzle water outlet waterway 422. The inclined straight waterway 423 helps the cooling water to form a flushing effect in the curved nozzle shell mold part 402, reducing the possibility of blockage in the curved nozzle waterway 42. In addition, the diameters of the straight waterway 423, the curved nozzle water outlet waterway 422, and the curved nozzle water inlet waterway 421 are all the same.

[0022] Continue to refer to Figure 4The elliptical water channel 1 424 and the elliptical water channel 2 425 are both located in the curved nozzle shell mold portion 402, and are both located on the side of the straight water channel 423 away from the cigarette cartridge compartment mold portion 401, and the diameter of the straight water channel 423 is greater than the diameter of the elliptical water channel 1 424 and the elliptical water channel 2 425. Both ends of the elliptical water channel 424 are connected to the straight water channel 423, and the long axis of the elliptical water channel 424 is inclined toward the outlet end of the straight water channel 423. The water flow direction of the water inlet end of the elliptical water channel 424 and the water flow direction of the straight water channel 423 form an acute angle, which helps the cooling water in the straight water channel 423 to enter the elliptical water channel 424. The water flow direction of the outlet end of the elliptical water channel 424 and the water flow direction of the straight water channel 423 form an obtuse angle, which allows the cooling water flowing out of the elliptical water channel 424 to collide with the cooling water in the straight water channel 423 when entering the straight water channel 423, and the water flow collision will generate vortices, thereby It will limit the flow rate at some positions of the straight water channel 423 and the flow rate at the water outlet end of the elliptical water channel 424, thereby prolonging the residence time of the cooling water in the straight water channel 423 and the elliptical water channel 424, which is helpful for the heat exchange of the curved suction nozzle shell mold part 402. In addition, the water inlet end of the elliptical water channel 424 connected to the straight water channel 423 is formed with a narrow throat 426. Therefore, the higher pressure of the cooling water fluid in the narrow throat 426 becomes lower after entering the elliptical water channel 424, which will make the cooling water flow faster when entering the elliptical water channel 424, and also play a flushing role in the elliptical water channel 424, reducing the possibility of cooling water being blocked in the elliptical water channel 424.Both ends of the elliptical water channel 425 are connected to the straight water channel 423, and the long axis of the elliptical water channel 425 is also inclined toward the water outlet end of the straight water channel 423. The water flow direction at the water inlet end of the elliptical water channel 425 and the water flow direction of the straight water channel 423 form an acute angle, and the acute angle helps the cooling water in the straight water channel 423 to enter the elliptical water channel 425. The water inlet end of the elliptical water channel 425 is connected to the water outlet end of the elliptical water channel 1 424, and the water inlet end of the elliptical water channel 425 connected to the straight water channel 423 is also formed with a narrow throat 426, and the part where the water inlet end of the elliptical water channel 425 is connected to the water outlet end of the elliptical water channel 1 424 is located downstream of the narrow throat 426, so that the vortex formed at the water outlet end of the elliptical water channel 1 424 is located downstream of the narrow throat 426, and the flow velocity change caused by the narrow throat 426 will impact the elliptical water channel 425. The vortex formed at the outlet end of the arc water channel 1 424 weakens the clogging ability of the vortex, so the narrow throat 426 can also prevent the small water channel from being blocked by the formation of the vortex, and also help the cooling water in the straight water channel 423 to enter the elliptical water channel 2 425. Furthermore, the angle between the water flow direction of the outlet end of the elliptical water channel 2 425 and the water flow direction of the straight water channel 423 is an obtuse angle. The obtuse angle state can make the cooling water flowing out of the elliptical water channel 2 425 collide with the cooling water in the straight water channel 423 when entering the straight water channel 423. The water flow collision will generate vortex, which will limit the flow rate at some positions of the straight water channel 423 and the flow rate at the outlet end of the elliptical water channel 2 425, thereby prolonging the cooling residence time in the straight water channel 423 and the elliptical water channel 2 425, which is helpful for heat exchange of the curved suction nozzle shell mold part 402.

[0023] This application can explain its functional principle through the following operation methods: For multi-cavity injection molds, during the injection molding process, multiple cavities are injected simultaneously, and the overall mold temperature is relatively high. In the present application, the insert 400 is an insert of an electronic cigarette mouthpiece, and the space of the curved nozzle shell mold portion 402 of the mouthpiece mold body 4 is limited. The water path in the curved nozzle shell mold portion 402 is relatively short, and the cooling water stays in the curved nozzle shell mold portion 402 for a short time, resulting in poor cooling efficiency.

[0024] During the injection molding process of the mold in the present application, the cooling system in the mold will be connected to the cigarette cartridge compartment water path 41 on one side of the cigarette holder mold body 4, and then the cooling water in the cooling system will enter the cigarette cartridge compartment water path 41 on one side. After the cooling water performs heat exchange on one side of the cigarette cartridge compartment mold part 401, it enters the curved suction nozzle water path 42 in the curved suction nozzle shell mold part 402. The cooling water flows through the curved suction nozzle water inlet water path 421 in the curved suction nozzle water path 42 and enters the straight water path 423 and the elliptical water path 1 424. The narrow throat 426 formed at the water inlet end of the elliptical water path 1 424 connected to the straight water path 423 will make the cooling water flow faster when entering the elliptical water path 1 424, so as to flush the elliptical water path 1 424. The effect is to reduce the possibility of cooling water being blocked in the elliptical water channel 1 424. A vortex will be formed at the connection between the elliptical water channel 1 424 and the elliptical water channel 2 425, which will prolong the residence time of the cooling water in the elliptical water channel 1 424, and help the heat exchange of the curved suction nozzle shell mold part 402. The water inlet end of the elliptical water channel 2 425 connected to the straight water channel 423 is also formed with a narrow throat 426. The flow velocity caused by the narrow throat 426 will increase and impact the vortex formed at the water outlet end of the elliptical water channel 1 424, thereby reducing the ability of the vortex to cause blockage. Therefore, the narrow throat 426 can also prevent the small water channel from being blocked by the formation of vortex, and also help the cooling water in the straight water channel 423 to enter the elliptical water channel 2 425.

[0025] Therefore, the present application solves the technical problems in the prior art that the water channel in the curved nozzle shell mold part 402 is short, the cooling water stays in the curved nozzle shell mold part 402 for a short time, and the cooling efficiency is poor. It achieves the goal of slowing down the flow rate of the cooling water in the narrow water channel, extending the heat exchange time under the same cooling water volume, reducing resource waste, and improving the cooling efficiency of the insert 400 as a whole.

[0026] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0027] What has been described above is only a preferred specific implementation manner of the embodiments of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical scheme and concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A multi-cavity injection mold, comprising a fixed mold (100), a movable mold (200), a mold core (300), and an insert (400), wherein the insert (400) is mounted on the mold core (300), and is characterized in that: The insert (400) comprises a plurality of cigarette holder mold bodies (4) and a mold base (5) for supporting the plurality of cigarette holder mold bodies (4); the cigarette holder mold body (4) comprises a cigarette cartridge compartment mold part (401) and a curved suction nozzle shell mold part (402); a cigarette cartridge compartment water channel (41) is formed in the cigarette cartridge compartment mold part (401), and a curved suction nozzle water channel (42) is formed in the curved suction nozzle shell mold part (402); The curved surface suction nozzle water channel (42) comprises: A curved suction nozzle water inlet water channel (421), vertically arranged at the connection portion between the cigarette cartridge compartment plastic mold portion (401) and the curved suction nozzle shell plastic mold portion (402), and connected to the upstream of the water flow in the cigarette cartridge compartment water channel (41); A curved nozzle water outlet water channel (422) is vertically arranged at the connection portion between the cartridge compartment plastic mold portion (401) and the curved nozzle shell plastic mold portion (402), and is connected to the downstream of the water flow in the cartridge compartment water channel (41); A straight water channel (423) is located in the curved suction nozzle shell mold part (402) at one side edge close to the cigarette cartridge compartment mold part (401), and is connected between the curved suction nozzle water inlet water channel (421) and the curved suction nozzle water outlet water channel (422); The elliptical water channel one (424) is located in the curved mouthpiece shell mold portion (402) and is located on the side of the straight water channel (423) away from the cigarette cartridge chamber mold portion (401). Both ends of the elliptical water channel one (424) are connected to the straight water channel (423), and the angle between the water flow direction of the water outlet end of the elliptical water channel one (424) and the water flow direction of the straight water channel (423) is an obtuse angle, and the angle between the water flow direction of the water inlet end of the elliptical water channel one (424) and the water flow direction of the straight water channel (423) is an acute angle.

2. A multi-cavity injection mold according to claim 1, characterized in that: The curved nozzle water channel (42) further comprises an elliptical water channel 2 (425), wherein the elliptical water channel 2 (425) and the elliptical water channel 1 (424) are located on the same side of the straight water channel (423), both ends of the elliptical water channel 2 (425) are connected to the straight water channel (423), the water flow direction of the water inlet end of the elliptical water channel 2 (425) forms an acute angle with the water flow direction of the straight water channel (423), and the elliptical water channel 2 (425) is connected to the water outlet end of the elliptical water channel 1 (424), and the water flow direction of the water outlet end of the elliptical water channel 2 (425) forms an obtuse angle with the water flow direction of the straight water channel (423).

3. A multi-cavity injection mold according to claim 2, characterized in that: The diameter of the straight water channel (423) is greater than the diameters of the elliptical water channel one (424) and the elliptical water channel two (425), and the diameter of the elliptical water channel one (424) is equal to the diameter of the elliptical water channel two (425).

4. A multi-cavity injection mold according to claim 3, characterized in that: The water inlet end of the elliptical arc water channel 1 (424) communicating with the straight water channel (423) and the water inlet end of the elliptical arc water channel 2 (425) communicating with the straight water channel (423) are both formed with a narrow throat (426).

5. A multi-cavity injection mold according to claim 2, characterized in that: The long axes of the elliptical water channel 1 (424) and the elliptical water channel 2 (425) are inclined toward the water outlet end of the straight water channel (423).

6. A multi-cavity injection mold according to claim 5, characterized in that: The straight water channel (423) is inclined, and one end of the straight water channel (423) connected to the curved suction nozzle water inlet channel (421) is higher than one end of the straight water channel (423) connected to the curved suction nozzle water outlet channel (422).

7. A multi-cavity injection mold according to claim 1, characterized in that: Two of the cartridge magazine water channels (41) are provided, and the two cartridge magazine water channels (41) are respectively close to two side walls of the cartridge magazine plastic mold portion (401), and the cartridge magazine water channels (41) are in an S-shaped route.

8. The multi-cavity injection mold according to claim 1, characterized in that: One end of the cartridge compartment water channel (41) on one side is a water inlet end, and the other end is connected to the curved nozzle water inlet water channel (421) in the curved nozzle water channel (42), and one end of the cartridge compartment water channel (41) on the other side is a water outlet end, and the other end is connected to the curved nozzle water outlet water channel (422) in the curved nozzle water channel (42).

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