Injection mold

Abstract

The utility model discloses an injection mold and relates to the technical field of injection molding. The injection mold comprises a male mold and a female mold, wherein the male mold comprises a male mold core; the female mold comprises a female mold core, a runner baffle abutting against the surface, away from the male mold core, of the female mold core and a sprue bush connected with the runner baffle, the male mold core and the female mold core abut against each other to form a mold cavity, the sprue bush is used for abutting against a nozzle of an injection molding machine, and the female mold core and the runner baffle are matched to form a plurality of main runners; the female mold core comprises branch runners communicating the mold cavity with the main runners and inner runners communicating the mold cavity with the main runners, each main runner corresponds to at least one branch runner, and at least one main runner is connected with the inner runners. The sprue bush is provided with an injection channel communicated with the nozzle and the main runner, the female mold core is provided with a main cold material well connected with the main runner, the main cold material well and the injection channel are correspondingly arranged and are sunken in the direction away from the injection channel, and the inner runner is arranged between the main cold material well and the branch runner. And through the main cold material well and the inner runner, the injection molding efficiency is improved.

Description

Technical Field

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

[0002] Moulds are known as the "mother of industry". Injection moulds, as one type of mould, are widely used in the production of plastic products. Injection moulds are generally composed of two parts: male mould and female mould. During the injection process, the mould is clamped on the injection moulding machine. The plastic is heated by the injection moulding machine and injected into the mould cavity formed by the male mould core and the female mould core, and then cooled and formed in the mould cavity.

[0003] The mold can form a variety of products, for example, some frame-shaped products can also be formed by injection molding. Figure 6 and Fig.11 As shown, Figure 6 and Fig.11 A cleaning tray is shown, which is used to carry battery shells for cleaning operations. The cleaning tray is hollow and includes an outer frame 30, an inner frame 31 arranged in the outer frame 30, and a skeleton 32 arranged in the inner frame 30. The skeleton 32 is a mesh structure, and a positioning frame 33 is arranged at its intersection. The positioning frame 33 is provided with a positioning column 34 for positioning the battery shell. Of course, the cleaning tray is not limited to being used to carry battery shells.

[0004] The structure of the cleaning tray product is complex, and the plastic has a long route in the mold cavity. During the injection molding process, the temperature of the male and female molds is lower than the temperature of the plastic in the nozzle. Therefore, in the mold cavity with a long route, the temperature of the plastic will gradually decrease when flowing through the mold cavity, resulting in a lower flow rate; on the one hand, the slow flow rate leads to a longer injection time, which affects the injection molding efficiency; on the other hand, the heated plastic has a long route in the mold cavity, and the plastic that enters the mold cavity first cools down and blocks the mold cavity after flowing for a period of time, resulting in the product not being fully molded.

[0005] Therefore, it is necessary to improve the prior art to overcome the above defects in the prior art. Utility Model Content

[0006] The utility model aims to provide an injection mold, which can improve the injection efficiency.

[0007] In order to achieve the above-mentioned utility model object, the utility model proposes an injection mold, which includes:

[0008] A male mold, including a male mold core; and

[0009] A female mold, comprising a female mold core, a flow channel baffle abutting against a surface of the female mold core facing away from the male mold core, and a sprue sleeve connected to the flow channel baffle, wherein the male mold core abuts against the female mold core to form a mold cavity, the sprue sleeve is used to abut against a nozzle of an injection molding machine, the female mold core and the flow channel baffle cooperate to form a plurality of main flow channels, the female mold core comprises a branch flow channel connecting the mold cavity and the main flow channel and an inner flow channel connecting the mold cavity and the main flow channel, each of the main flow channels corresponds to at least one branch flow channel, at least one main flow channel is connected to the inner flow channel, and the inner flow channel is closer to the center of the mold cavity than the branch flow channel;

[0010] The gate sleeve is provided with a sprue connecting the nozzle and the main channel, the mother mold core is provided with a main cold material well connected to the main channel, the main cold material well is arranged corresponding to the sprue and is recessed in a direction away from the sprue, and the inner flow channel is arranged between the main cold material well and the branch flow channel.

[0011] Furthermore, the main flow channel is arranged on the surface of the mother mold core facing the flow channel baffle, and the flow channel baffle seals the opening of the main flow channel toward the flow channel baffle.

[0012] Furthermore, the main flow channel extends in a direction away from the injection channel and is arranged perpendicular to the injection channel, and the branch flow channel, the inner flow channel and the injection channel are arranged in parallel.

[0013] Further, the injection molded product for molding in the mold cavity includes an outer frame, an inner frame connected to the outer frame, and a skeleton connected to the inner frame, the skeleton includes a plurality of first ribs arranged at intervals and a plurality of second ribs arranged at intervals, both ends of the first ribs and the second ribs are connected to the inner frame, and the first ribs and the second ribs are arranged crosswise; the outermost first rib and the outermost second rib form a first intersection, the first rib in the middle position and the outermost second rib form a second intersection, and the second rib in the middle position and the outermost first rib form a third intersection;

[0014] Each of the main flow channels is correspondingly provided with a branch flow channel, and the first intersection point, the second intersection point and the third intersection point are each correspondingly provided with a branch flow channel.

[0015] Furthermore, the number of the inner flow channel is one;

[0016] The second rib located in the middle includes a first part between the first rib located in the middle and the first rib adjacent to it, the first rib located in the middle includes a second part between the second rib located in the middle and the second rib adjacent to it, and the inner flow channel is arranged corresponding to the middle position of the first part or the second part.

[0017] Furthermore, the branch channel is spaced apart from the outer end of the main channel, and the area of ​​the main channel located outside the branch channel forms a cooling well.

[0018] Furthermore, a material pulling well is provided on the surface where the flow channel baffle plate abuts against the mother mold core, and the material pulling well is provided corresponding to the branch flow channel. The flow channel baffle plate is provided with a material pulling rod, and the material pulling rod includes a first fixed portion provided in the material pulling well, and the cross-sectional area of ​​the first fixed portion gradually decreases in the direction away from the mother mold core.

[0019] Furthermore, the mother mold core also includes an injection well connected between the main channel and the main cold material well, the main cold material well is located at the bottom of the injection well, the injection channel, the main cold material well and the injection well are coaxially arranged, and the cross-sectional area of ​​the injection well along the axial direction perpendicular to the injection channel is larger than the cross-sectional area of ​​the main cold material well.

[0020] Furthermore, the main flow channel is connected to one end of the injection well close to the nozzle.

[0021] Furthermore, the gate sleeve includes a second fixing portion arranged in the injection well, and the cross-sectional area of ​​the second fixing portion along the direction perpendicular to the axis of the injection channel gradually decreases in the direction away from the main cold material well.

[0022] Furthermore, the cross-sectional area of ​​the injection channel along its axial direction gradually decreases in the direction away from the main cold material well, and the cross-sectional areas of the branch channel and the main cold material well along the axial direction of the injection channel gradually increase in the direction away from the male mold.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] On the one hand, by setting the relatively outer runner and the relatively inner runner close to the center of the mold cavity, the plastic can be injected into the mold cavity at multiple points, and the mold cavity can be filled at the same time near the middle and near the outside, which is conducive to improving the injection efficiency and ensuring the molding quality. On the other hand, the injection mold is provided with a main cold material well at the position corresponding to the sprue, which can store the cold material at the end of the nozzle and allow hot plastic to enter the mold cavity, which is conducive to filtering out impurities and preventing material blockage, thereby improving the quality of the molded product. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1It is a schematic diagram of an injection mold of an embodiment of the utility model.

[0026] Figure 2 yes Figure 1 The diagram shows the connection between the sprue sleeve, runner baffle, pull rod, female mold core and male mold core of the injection mold.

[0027] Figure 3 yes Figure 2 Exploded view of the injection mold shown.

[0028] Figure 4 yes Figure 2 Cross-section of the injection mold shown.

[0029] Figure 5 yes Figure 1 Schematic diagram of the structure of the middle mother mold.

[0030] Figure 6 yes Figure 1 Schematic diagram of the injection molded product shown.

[0031] Figure 7 yes Figure 1 Schematic diagram of the positions of the injection molded product, waste material and pull rod of the injection mold shown.

[0032] Figure 8 yes Figure 4 A partial enlarged view of point Ⅰ is shown.

[0033] Fig. 9 yes Figure 4 A local enlarged view of point Ⅱ is shown.

[0034] Fig.10 yes Figure 1 Schematic diagram of the waste of the injection mold shown.

[0035] Fig.11 yes Figure 1 A schematic diagram of the injection molded product shown in another viewing direction. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some structures related to the present application are shown in the accompanying drawings, rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0037] The terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0038] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0039] like Figures 1 to 5 As shown, an injection mold corresponding to a preferred embodiment of the utility model includes a male mold 1 and a female mold 2.

[0040] The male mold 1 includes a male mold core 11, which is fixed on the injection molding machine.

[0041] The female mold 2 is used to cooperate with the male mold 1 to complete the injection molding. The female mold 2 and the male mold 1 can move relative to each other to complete the action of closing and opening the mold. The female mold 2 includes a female mold core 21, a flow channel baffle 23 that abuts against the surface of the female mold core 21 away from the male mold core 11, and a sprue sleeve 22 connected to the flow channel baffle 23. The male mold core 11 and the female mold core 21 abut to form a mold cavity 110. The female mold core 21 and the flow channel baffle 23 cooperate to form a plurality of main channels 210. The female mold core 21 includes a branch channel 211 connecting the mold cavity 110 and the main channel 210 and an inner channel 212 connecting the mold cavity 110 and the main channel 210. Each main channel 210 corresponds to at least one branch channel 211, and at least one main channel 210 is connected to an inner channel 212. The inner channel 212 is closer to the center of the mold cavity 110 than the branch channel 211.

[0042] The gate sleeve 22 is provided with a sprue 220 connecting the nozzle and the main channel 210, and the mother mold core 21 is provided with a main cold material well 213 connected to the main channel 210. The main cold material well 213 is arranged corresponding to the sprue 220 and is recessed in a direction away from the sprue 220. Optionally, the main cold material well 213 and the sprue 220 are arranged coaxially, and the inner flow channel 212 is arranged between the main cold material well 213 and the branch channel 211.

[0043] The male mold 1 and the female mold 2 are respectively fixedly connected to the injection molding machine. Under the action of the injection molding machine, the male mold 1 and the female mold 2 can be opened and closed freely; the sprue sleeve 22 is used to connect with the nozzle of the injection molding machine. The heated plastic enters the main channel 210 through the sprue 220 of the sprue sleeve 22, flows through the branch channel 211 and the inner channel 212 connected to the main channel 210, and enters the mold cavity 110; the branch channel 211 and the inner channel 212 cooperate with each other to make the plastic flow evenly into the mold cavity 110. After completing an injection molded product 3, the male mold 1 and the female mold 2 are opened under the action of the injection molding machine, and the product is separated from the waste material 4 located in the flow channel; because the main channel 210 is set between the female mold core 21 and the flow channel baffle 23, the waste material 4 can be separated from the female mold core 21 and the flow channel baffle 23, so as to facilitate injection molding again.

[0044] Since the position corresponding to the mold and the injection channel 220 is provided with a main cold material well 213, the plastic ejected from the nozzle will first enter the main cold material well 213, and then flow into the main channel 210. Therefore, the plastic with a lower temperature at the end of the nozzle can be stored in the main cold material well 213. After the main cold material well 213 is filled, the subsequent hotter plastic will enter the main channel 210, which can effectively prevent the subsequent injection molding from being blocked because the plastic with too low temperature at the end of the nozzle first flows into the main channel 210, which is conducive to speeding up the injection molding efficiency and ensuring the reliable injection molding. In addition, the plastic at the end of the nozzle may contain impurities, causing product defects. Therefore, setting the main cold material well 213 in the flow channel can filter the plastic at the end of the nozzle, prevent this part of the plastic from becoming part of the injection molded product, thereby improving the molding quality and molding efficiency.

[0045] Furthermore, the main channel 210 is connected with a branch channel 211 relatively close to the outer edge of the mold cavity and an inner channel 212 relatively to the center of the mold cavity. The branch channel 211 and the inner channel 212 cooperate with each other so that the heated plastic can enter the mold cavity 110 from multiple positions at the same time, and the middle and the periphery are filled with plastic at the same time, thereby effectively improving the injection molding efficiency.

[0046] In this embodiment, the number of the main flow channels 210 is the same as the number of the branch flow channels 211 , both of which are 8, and the number of the inner flow channel 211 is one.

[0047] like Figures 3 to 5 As shown, the main channel 210 is arranged on the surface of the mother mold core 21 facing the channel baffle 23, and the channel baffle 23 seals the opening of the main channel 210 toward the channel baffle 23. The upper surface of the mother mold core 21 is fitted with the channel baffle 23, thereby sealing the upper end of the main channel 210 to prevent plastic from overflowing. The main channel 210 is arranged on the surface of the mother mold core 21, and can be separated from the mother mold core 21 after injection molding is completed, so that the waste material 4 can be separated from the mother mold core 21.

[0048] It is understandable that the main channel 210 can also be set on the surface of the flow channel plate 23 facing the mother mold core 21 or partially set on the surface of the mother mold core 21 facing the flow channel baffle 23, and partially set on the surface of the flow channel plate 23 facing the mother mold core 21.

[0049] The main flow channel 210 extends in a direction away from the injection channel 220 and is arranged perpendicular to the injection channel 220. The main flow channel 210 extends toward the outer edge of the mold cavity 110. The main cold material well 213 and the injection channel 220 are located at the center of the mold cavity 110. The inner flow channel 212 is close to the center of the mold cavity 110 and is adjacent to the main cold material well 213, so that the plastic can be injected into the mold cavity 100 from a position close to the outside of the mold cavity 110 toward the center and from the center to the outside of the mold cavity 110 at the same time, thereby improving the injection molding efficiency; at the same time, because the temperature in the mold cavity 110 is lower than the nozzle temperature, multiple main flow channels 210 can reduce the risk of the injection molded product 3 not being fully molded due to the temperature drop caused by the long-term flow of plastic in the mold cavity 110, thereby reliably ensuring the molding quality of the frame-shaped product.

[0050] like Figure 4 As shown, the branch channel 211, the inner flow channel 212 and the injection channel 220 are arranged in parallel; optionally, the branch channel 211, the inner flow channel 212 and the injection channel 220 are all perpendicular to the surface of the mother mold core 21 facing the flow channel baffle 23, on the one hand, it can reduce the length of the flow path of the heated plastic, thereby improving the injection molding efficiency; on the other hand, it can facilitate the separation of the waste 4 from the mother mold core 21.

[0051] like Figure 6 As shown, the injection molded product 3 formed in the mold cavity 110 includes an outer frame 30, an inner frame 31 connected to the outer frame 30, and a skeleton 32 connected to the inner frame 31, the skeleton 32 includes a plurality of first ribs 320 and a plurality of second ribs 321 arranged at intervals, both ends of the first ribs 320 and the second ribs 321 are connected to the inner frame 31, and the first ribs 320 and the second ribs 321 are cross-arranged. Figure 6 In the illustrated embodiment, the outer frame 30 and the inner frame 31 are rectangular frames, the first ribs 320 and the second ribs 321 are perpendicularly arranged to form a mesh structure, and the first ribs 320 and the second ribs 321 are arranged at equal intervals along the length direction X and the width direction Y of the injection molded product 3, and the number is 7 and 5 respectively.

[0052] The outermost first rib 320 and the outermost second rib 321 form four first intersections 3200 , the middle first rib 320 and the outermost second rib 321 form two second intersections 3201 , and the middle second rib 321 and the outermost first rib 320 form two third intersections 3202 .

[0053] In this embodiment, each main channel 210 is provided with a corresponding branch channel 211, and each of the first intersection 3200, the second intersection 3201 and the third intersection 3202 is provided with a corresponding branch channel 211. Figure 6 and Figure 7 In the embodiment shown, there are eight flow channels 211 disposed around the mold cavity 110. The main flow channel 210 is in a cross-shaped shape. The heated plastic can flow from the surroundings to the center of the mold cavity 110 and the outer edge of the mold cavity 110 to achieve multi-point injection molding, thereby improving the injection molding efficiency and ensuring the molding quality of the frame-shaped product.

[0054] It is understandable that, in some embodiments, the number of runners 211 can be set according to the size of the actual injection molded product 3, so that the runners 211 are arranged around the mold cavity 110, thereby realizing simultaneous injection molding at multiple positions and improving injection molding efficiency.

[0055] Further, such as Figure 6 and Figure 7 As shown, the number of the inner flow channel 212 is one; the second rib 321 located in the middle includes the first part 3210 located in the middle and the first rib 320 adjacent thereto; the first rib 320 located in the middle includes the second part 3203 located in the middle and the second rib 321 adjacent thereto; the inner flow channel 212 is arranged corresponding to the middle position of the first part 3210 or the second part 3203. It can be seen that the inner flow channel 212 is close to the center of the mold cavity 110, and the heated plastic can be filled from the center of the mold cavity 110 to the outside through the inner flow channel 212. In this embodiment, the inner flow channel 212 is arranged corresponding to the second part 3203.

[0056] The branch flow channel 211 is arranged around the mold cavity 110 and the inner flow channel 212 is arranged near the center of the mold cavity 110, which increases the flow rate of the plastic and improves the injection molding efficiency.

[0057] It is understandable that when the plastic is cooled in the flow channel, waste 4 will be formed, so the shape of the waste 4 is consistent with the shape of the flow channel. Fig.10 As shown, waste 4 and Figure 6 and Figure 7 Corresponding to the flow channels in the illustrated embodiment, the waste material 4 includes a first portion 40, a second portion 41, a third portion 42, a fourth portion 43 and a fifth portion 44, wherein each portion corresponds to the injection channel 220, the main channel 210, the branch channel 211, the inner channel 212 and the branch cooling well 2110 respectively.

[0058] like Figure 4 and Figure 8As shown, the branch channel 211 is spaced apart from the outer end of the main channel 210, and the area of ​​the main channel 210 outside the branch channel 211 forms a branch cold material well 2110. When the plastic flows through the main cold material well 213, there is insufficient filtration. Therefore, when the plastic flows through the main channel, the cold material that is not filtered by the main cold material well 213 and the plastic with impurities are further filtered by the branch cold material well 2110, thereby improving the injection molding efficiency and product quality.

[0059] It can be understood that the cooling well 2110 is a part of the main channel 210 and has the same structure as the main channel 210, thereby facilitating processing.

[0060] In this embodiment, Figure 4 and Figure 8 As shown, a material pulling well 231 is provided on the surface where the flow channel baffle 23 abuts against the mother mold core 21. The material pulling well 231 is arranged corresponding to the branch channel 211. The flow channel baffle 23 is provided with a material pulling rod 232. The material pulling rod 232 includes a first fixed portion 2320 arranged in the material pulling well 231. The cross-sectional area of ​​the first fixed portion 2320 gradually decreases in the direction away from the mother mold core 21, and is in the shape of a cone with a small upper part and a large lower part. The material pulling rod 232 is arranged coaxially with the material pulling well 231. During injection molding, the heated plastic flows into the pulling well 231 through the main channel 210, and the plastic wraps the first fixing part 2320. Since the first fixing part 2320 is designed with one end larger than the other end, the waste material 4 can be fixed by the pulling rod 232 during the mold opening process. When the mother mold core 21 is separated from the runner baffle 23, the runner baffle 23 can pull the waste material 4 to separate it from the injection molded product 3; optionally, the pulling well 231 is arranged corresponding to the branch channel 211, and the pulling force directly acts on the part of the waste material 4 in the branch channel 211, thereby improving the efficiency of separating the injection molded product 3 from the waste 4.

[0061] The flow channel baffle 23 is provided with a mounting hole for mounting the material pulling rod 232 . The mounting hole is coaxially arranged with the material pulling well 231 . The first fixing portion 2320 is arranged in the material pulling well 231 .

[0062] like Figure 4 and Fig. 9 As shown, the mother mold core 21 also includes an injection well 214 connected between the main channel 210 and the main cold material well 213, the main cold material well 213 is located at the bottom of the injection well 214, the injection channel 220, the main cold material well 213 and the injection well 214 are coaxially arranged, and the cross-sectional area of ​​the injection well 214 along the axial direction A perpendicular to the injection channel 220 is larger than the cross-sectional area of ​​the main cold material well 213.

[0063] The heated plastic first flows into the main cold material well 213 through the injection channel 220. When the main cold material well 213 is full, the plastic will begin to flow to the injection well 214. The diameter of the injection well 214 is larger than the diameter of the main cold material well 213. At this time, the injection well 214 has the function of storing plastic. When the injection well 214 is filled with plastic, the plastic in the injection well 214 flows evenly into the main channel 210, so that the capacity of plastic flowing to the surroundings of the mold cavity 110 is the same, which is beneficial to improving the injection molding efficiency.

[0064] Furthermore, the main channel 210 is connected to one end of the injection well 214 close to the nozzle. At this time, the end of the injection well 214 away from the nozzle has the function of filtering impurities and cold materials in the plastic, thereby improving the molding efficiency and product quality.

[0065] like Figure 4 and Fig. 9 As shown, the lower end of the sprue bushing 22 includes a second fixing portion 221 disposed in the injection well 214, and the cross-sectional area of ​​the second fixing portion 221 along the axial direction perpendicular to the injection channel 220 gradually decreases in the direction away from the main cold material well 213. At this time, the sprue bushing 22 not only has the function of conveying the heated plastic, but also has the function of the pulling rod 232. When the plastic fills the injection well 214, it wraps the second fixing portion 221. When the runner baffle 23 and the mother mold core 21 are separated, the sprue bushing 22 can pull the waste material 4 to separate it from the injection molded product 3.

[0066] Figure 3 and Figure 7 In the embodiment shown, the main channel 210 is arranged in a cross shape around the injection channel 220. When the mold is opened, the center of the main channel 210 and the corresponding positions of the branch channel 211 are subjected to a pulling force, and the pulling force on the waste material 4 is more uniform. Under the action of the gate sleeve 22 and the pulling rod 232, it can be reliably separated from the injection molded product 3.

[0067] Furthermore, the cross-sectional area of ​​the shunt channel 211 and the main cold material well 213 along the axial direction of the sprue 220 gradually increases away from the male mold 1, so that the waste material 4 in the shunt channel 211 can be easily separated from the female mold core 21. The cross-sectional area of ​​the sprue 220 along the axial direction thereof gradually decreases away from the main cold material well 213, so that the waste material 4 in the sprue 220 can be easily separated from the sprue 220.

[0068] like Figure 1 As shown, the male mold 1 also includes a male mold plate 10 connected to the male mold core 11, a pin mechanism 12 for ejecting the injection molded product 3 out of the mold cavity 110, and a male mold base plate 13, and the female mold 2 also includes a female mold plate 24 connected to the female mold core 21 and a female mold base plate 25 connected to the injection molding machine.

[0069] The above are only specific implementations of the present invention, and any improvements made based on the concept of the present invention are considered to be within the protection scope of the present invention.

Claims

1. An injection mold, characterized in that: include: A male mold (1), including a male mold core (11); and The female mold (2) comprises a female mold core (21), a flow channel baffle (23) abutting against a surface of the female mold core (21) facing away from the male mold core (11), and a sprue sleeve (22) connected to the flow channel baffle (23); the male mold core (11) and the female mold core (21) abut to form a mold cavity (110); the sprue sleeve (22) is used to connect with a nozzle of an injection molding machine; the female mold core (21) and the flow channel baffle (23) cooperate to form a plurality of main flow channels (210); the female mold The core (21) comprises a branch flow channel (211) connecting the mold cavity (110) and the main flow channel (210), and an inner flow channel (212) connecting the mold cavity (110) and the main flow channel (210), each of the main flow channels (210) corresponds to at least one branch flow channel (211), at least one main flow channel (210) is connected to the inner flow channel (212), and the inner flow channel (212) is closer to the center of the mold cavity (110) than the branch flow channel (211); The gate sleeve (22) is provided with a sprue (220) connecting the nozzle and the main channel (210), and the mother mold core (21) is provided with a main cold material well (213) connected to the main channel (210). The main cold material well (213) is arranged corresponding to the sprue (220) and is recessed in a direction away from the sprue (220), and the inner flow channel (212) is arranged between the main cold material well (213) and the branch channel (211).

2. The injection mold according to claim 1, characterized in that: The main flow channel (210) is arranged on the surface of the mother mold core (21) facing the flow channel baffle (23), and the flow channel baffle (23) seals the opening of the main flow channel (210) facing the flow channel baffle (23).

3. The injection mold according to claim 1, characterized in that: The main flow channel (210) extends in a direction away from the injection channel (220) and is arranged perpendicular to the injection channel (220), and the branch flow channel (211), the inner flow channel (212) and the injection channel (220) are arranged in parallel.

4. The injection mold according to claim 3, characterized in that: The injection molded product (3) used for molding in the mold cavity (110) comprises an outer frame (30), an inner frame (31) connected to the outer frame (30), and a skeleton (32) connected to the inner frame (31), wherein the skeleton (32) comprises a plurality of first ribs (320) arranged at intervals and a plurality of second ribs (321) arranged at intervals, wherein both ends of the first ribs (320) and the second ribs (321) are connected to the inner frame (31), and the first ribs (320) and the second ribs (321) are connected to the inner frame (31). A rib (320) and the second rib (321) are arranged crosswise; the first rib (320) at the outermost side and the second rib (321) at the outermost side form a first intersection (3200), the first rib (320) at the middle position and the second rib (321) at the outermost side form a second intersection (3201), and the second rib (321) at the middle position and the first rib (320) at the outermost side form a third intersection (3202); Each of the main channels (210) is correspondingly provided with a branch channel (211), and each of the first intersection (3200), the second intersection (3201) and the third intersection (3202) is correspondingly provided with a branch channel (211).

5. The injection mold according to claim 4, characterized in that: The number of the inner flow channel (212) is one; The second rib (321) located in the middle includes a first portion (3210) between the first rib (320) located in the middle and the first rib (320) adjacent thereto, the first rib (320) located in the middle includes a second portion (3203) between the second rib (321) located in the middle and the second rib (321) adjacent thereto, and the inner flow channel (212) is arranged corresponding to the middle position of the first portion (3210) or the second portion (3203).

6. The injection mold according to claim 1, characterized in that: The branch channel (211) is spaced apart from the outer end of the main channel (210), and the area of ​​the main channel (210) located outside the branch channel (211) forms a cooling well (2110).

7. The injection mold according to any one of claims 1 to 6, characterized in that: A material pulling well (231) is provided on the surface of the flow channel baffle (23) abutting against the mother mold core (21), and the material pulling well (231) is arranged corresponding to the branch flow channel (211). The flow channel baffle (23) is provided with a material pulling rod (232), and the material pulling rod (232) includes a first fixed portion (2320) arranged in the material pulling well (231), and the cross-sectional area of ​​the first fixed portion (2320) gradually decreases in the direction away from the mother mold core (21).

8. The injection mold according to claim 7, characterized in that: The mother mold core (21) also includes an injection well (214) connected between the main channel (210) and the main cold material well (213), the main cold material well (213) is located at the bottom of the injection well (214), the injection channel (220), the main cold material well (213) and the injection well (214) are coaxially arranged, and the cross-sectional area of ​​the injection well (214) along the axial direction perpendicular to the injection channel (220) is larger than the cross-sectional area of ​​the main cold material well (213).

9. The injection mold according to claim 8, characterized in that: The main flow channel (210) is connected to one end of the injection well (214) close to the nozzle.

10. The injection mold according to claim 8, characterized in that: The gate sleeve (22) includes a second fixing portion (221) arranged in the injection well (214), and the cross-sectional area of ​​the second fixing portion (221) along the axial direction perpendicular to the injection channel (220) gradually decreases in the direction away from the main cold material well (213).

11. The injection mold according to any one of claims 1 to 6, characterized in that: The cross-sectional area of ​​the injection channel (220) along its axial direction gradually decreases in the direction away from the main cold material well (213), and the cross-sectional area of ​​the branch channel (211) and the main cold material well (213) along the axial direction of the injection channel (220) gradually increases in the direction away from the male mold (1).

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