Injection mold

Abstract

The utility model discloses an injection mold. The injection mold comprises a first mold core and a second mold core, the first mold core is provided with a first forming surface, the second mold core is arranged on the first mold core, the second mold core is provided with a second forming surface, the second forming surface is attached to the surface of a first material and the surface of a second material, and the second forming surface and the first forming surface are configured to define a cavity with the first material and the second material; a drainage groove is formed in the second forming face, and a drainage runner is defined by the drainage groove and the surface of the first material. The drainage runner comprises a first area, a second area and a third area which are communicated with one another; the second mold core is provided with an injection molding opening which is communicated with the first area; the second area is communicated with the cavity, a first communication port is formed between the second area and the first area, a second communication port is formed between the third area and the first area, and the first communication port is smaller than the second communication port. According to the injection mold, the problems of weld marks, plastic cracking and the like generated during injection molding can be reduced, and the injection molding quality is improved.

Description

Technical Field

[0001] This application relates to the field of mold technology, and in particular to an injection mold. Background Technology

[0002] In related technologies, injection molding is used to join two materials into a single unit. For example, molten filler such as plastic is injected into the cavity between the two materials. The molten filler comes into contact with the two materials, and after cooling, it joins them together. However, due to the structural limitations of the materials, a cold slug well cannot be installed, causing the cold material at the tip of the injection nozzle to directly fill the cavity. This easily leads to defects such as weld lines, plastic cracking, and cold slug heads, resulting in a highly unstable process and low yield. Utility Model Content

[0003] In view of this, it is necessary to provide an injection mold that can reduce problems such as weld lines and plastic cracking during injection molding and improve the quality of injection molding.

[0004] This application provides an injection mold for injection molding a connector to connect a first material and a second material. The injection mold includes a first mold core and a second mold core. The first mold core supports the first material and the second material and has a first molding surface. The second mold core is disposed on the first mold core and has a second molding surface. The second molding surface is in contact with the surfaces of the first material and the second material. The second molding surface and the first molding surface are configured to enclose the first material and the second material to form a cavity. The cavity is used to form the connector. The second molding surface is provided with a drainage groove, which encloses the surface of the first material to form a drainage channel. The drainage channel includes a first region, a second region, and a third region that are interconnected. The second mold core has an injection port that is connected to the first region. The second region is connected to the cavity. A first connecting opening is provided between the second region and the first region, and a second connecting opening is provided between the third region and the first region. The cross-sectional area of ​​the first connecting opening is smaller than the cross-sectional area of ​​the second connecting opening.

[0005] In the aforementioned injection mold, after the molten filler enters the first region through the injection port, a portion enters the second region through the first connecting port, and another portion enters the third region through the second connecting port. Since the first connecting port is smaller than the second connecting port, the resistance to the filler at the second connecting port is less, causing most of the filler entering the first region to preferentially flow to the third region through the second connecting port. Once the third region is filled with filler, the filler that entered the first region can more easily enter the second region through the first connecting port, and then flow into the mold cavity. This allows most of the cold material that entered the first region to first enter the third region, reducing defects such as weld lines, plastic cracking, and cold slug heads caused by cold material entering the mold cavity, thus improving the injection molding quality.

[0006] In at least one embodiment, the height of the second region is less than the height of the first region, and the height of the third region is greater than or equal to the height of the first region.

[0007] Understandably, the higher the region, the greater the thickness of the molten filler. The molten filler preferentially fills regions with greater thickness and lower flow resistance, meaning some of the cold material is first diverted to the third region. When the third region is insufficient to accommodate the filler from the first region, the filler flows back to the second region. During this backflow, the abrupt change from a thicker region to a thinner region increases the filling resistance, creating a viscous heating effect that raises the local temperature of the filler, thus reducing filling defects. Simultaneously, the shear thinning effect created by the mutual shearing of two filler streams flowing in different directions accelerates the filling process, ensuring the filler remains in a high-temperature molten state during filling. This results in more uniform crystal growth, more stable molecular arrangement, and improved injection molding performance.

[0008] In at least one embodiment, the volume of the third region is greater than the volume of the second region.

[0009] Compared to the second region, the third region has more space to accommodate molten filler, making it easier for filler from the first region to enter the third region. This facilitates filling the third region with cold material from the front end during injection molding, reducing the amount of cold material entering the cavity.

[0010] In at least one embodiment, the second region and the third region are disposed on opposite sides of the first region.

[0011] After the molten filler fills the third region, some of the filler from the third region will flow into the first and second regions, and the filler from the first region will continue to flow into the third region. This causes the two filler flows to flow in opposite directions, thereby generating a shear thinning effect to accelerate the filler filling and ensure that the filler remains in a high-temperature molten state during the filling process, which is conducive to more uniform crystal growth.

[0012] In at least one embodiment, the height of the drainage channel is higher than the height of the cavity, and the drainage channel is configured to guide the molten filler into the cavity along the direction of gravity.

[0013] By utilizing the property that fillers can flow downwards under the influence of gravity, the flow rate of fillers into the cavity can be increased, allowing the cavity to be filled as quickly as possible and improving injection molding efficiency.

[0014] In at least one embodiment, the cross-sectional area of ​​the third region gradually increases along the direction away from the second region.

[0015] Starting from the second connection point, the cross-section of the third region gradually increases, making it easier for the molten filler material through the second connection point to flow into the third region, further reducing the amount of cold material entering the cavity.

[0016] In at least one embodiment, the injection mold includes a heating element; the heating element is provided with a hot runner, the hot runner includes an injection nozzle, the hot runner is used to convey molten filler, and the injection nozzle is connected to the injection port.

[0017] When the molten filler passes through the hot runner, the heating element continues to heat the filler, which helps maintain a certain temperature. This prevents the filler from cooling down before entering the runner and cavity, thus improving the injection molding quality.

[0018] In at least one embodiment, the hot runner includes a main runner and a plurality of branch runners, the main runner and the branch runners being connected, each branch runner having an injection nozzle; a plurality of drainage runners are provided, each injection nozzle being connected to one of the drainage runners.

[0019] Multiple branch channels can divert the filler in the main channel to different injection nozzles, and inject the filler into multiple drainage channels through multiple injection nozzles, thereby facilitating the injection of filler into the mold cavity from multiple drainage channels and improving injection molding efficiency.

[0020] In at least one embodiment, the injection mold includes a fixed seat disposed above the second mold core, the fixed seat having a mounting groove, a heating element disposed in the mounting groove, and a hot runner penetrating the fixed seat.

[0021] The mounting base can support and install the heating element, allowing the molten filler to flow along the hot runner from the top of the second mold core to the flow channel under the action of gravity. This helps to increase the flow rate of the filler and improve the injection molding efficiency.

[0022] In at least one embodiment, the injection mold includes at least one set of positioning members, each set of positioning members being used to clamp and fix a first material and a second material; each set of positioning members includes two opposing positioning members, the positioning members being disposed on a first mold core and being movable in a direction toward or away from each other, to clamp or release the first material and the second material.

[0023] The positioning elements can clamp and fix the first and second materials, improving their stability during injection molding and increasing the dimensional accuracy of the injection molding process. By moving the positioning elements, the two opposing positioning elements can be moved away from each other, thus facilitating the release of the fixation on the first and second materials. Attached Figure Description

[0024] Figure 1 This is a perspective view of an injection mold in one embodiment of this application.

[0025] Figure 2 yes Figure 1 A cross-sectional view of the injection mold along the II-II direction.

[0026] Figure 3 This is a perspective view of the first mold core, the first material, and the second material in one embodiment of this application.

[0027] Figure 4 This is a partial schematic diagram illustrating the positional relationship between the first molding surface and the cavity in one embodiment of this application.

[0028] Figure 5 This is a perspective view of the second mold core in one embodiment of this application.

[0029] Figure 6 This is a partial cross-sectional view in one embodiment of the present application, illustrating the positional relationship between the drainage channel and the first mold core.

[0030] Figure 7 This is a side view illustrating the drainage channel in one embodiment of this application.

[0031] Figure 8 This is a top view illustrating the drainage channel in one embodiment of this application.

[0032] Figure 9 This is a perspective view of the hot runner and the first mold core in one embodiment of this application.

[0033] Explanation of main component symbols

[0034] 100. Injection mold; 10. First mold core; 11. First support part; 12. Second support part; 13. First molding surface; 20. Second mold core; 21. Second molding surface; 22. Drain groove; 23. Injection port; 30. Upper mold plate; 40. Lower mold plate; 50. Cavity; 60. Drain runner; 61. First area; 62. Second area; 63. Third area; 64. First connecting port; 65. Second connecting port; 70. Heating element; 71. Hot runner; 711. Injection nozzle; 712. Inlet; 713. Main runner; 714. Branch runner; 80. Fixing seat; 90. Positioning element; 200. Connecting element; 300. First material; 400. Second material.

[0035] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0038] In the description of the embodiments of this application, the technical terms "first", "second", etc. are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0039] In related technologies, injection molding is used to join two materials into a single unit. For example, molten filler such as plastic is injected into the cavity between the two materials. The molten filler comes into contact with the two materials, and after cooling, it joins them together. However, due to the structural limitations of the materials, a cold slug well cannot be installed, causing the cold material at the tip of the injection nozzle to directly fill the cavity. This easily leads to defects such as weld lines, plastic cracking, and cold slug heads, resulting in a highly unstable process and low yield.

[0040] In view of this, this application provides an injection mold for injection molding a connector to connect a first material and a second material. The injection mold includes a first mold core and a second mold core. The first mold core supports the first material and the second material and has a first molding surface. The second mold core is disposed on the first mold core and has a second molding surface. The second molding surface is in contact with the surfaces of the first material and the second material. The second molding surface and the first molding surface are configured to surround the first material and the second material to form a cavity. The cavity is used to form the connector. The second molding surface is provided with a drainage groove, which surrounds the surface of the first material to form a drainage channel. The drainage channel includes a first region, a second region, and a third region that are interconnected. The second mold core has an injection port that is connected to the first region. The second region is connected to the cavity. A first connecting opening is provided between the second region and the first region, and a second connecting opening is provided between the third region and the first region. The cross-sectional area of ​​the first connecting opening is smaller than the cross-sectional area of ​​the second connecting opening.

[0041] In the aforementioned injection mold, after the molten filler enters the first region through the injection port, a portion enters the second region through the first connecting port, and another portion enters the third region through the second connecting port. Since the first connecting port is smaller than the second connecting port, the resistance to the filler at the second connecting port is less, causing most of the filler entering the first region to preferentially flow to the third region through the second connecting port. Once the third region is filled with filler, the filler that entered the first region can more easily enter the second region through the first connecting port, and then flow into the mold cavity. This allows most of the cold material that entered the first region to first enter the third region, reducing defects such as weld lines, plastic cracking, and cold slug heads caused by cold material entering the mold cavity, thus improving the injection molding quality.

[0042] The embodiments of this application will be further described below with reference to the accompanying drawings.

[0043] Please see Figures 1 to 3 This application provides an injection mold 100 for injection molding a connector 200 to connect a first material 300 and a second material 400. The injection mold 100 includes a first mold core 10, a second mold core 20, an upper mold plate 30, and a lower mold plate 40. The first mold core 10 is disposed on the lower mold plate 40, and the second mold core 20 is disposed on the upper mold plate 30. For example, the first mold core 10 is a male mold core, and the second mold core 20 is a female mold core.

[0044] In some embodiments, a first mold core 10 supports a first material 300 and a second material 400, and a second mold core 20 is disposed on the first mold core 10. Specifically, the first mold core 10 has a first support portion 11 and a second support portion 12, with the first material 300 placed on the first support portion 11 and the second material 400 placed on the second support portion 12. For example, the first support portion 11 and the second support portion 12 are planar, the first material 300 is flat, the second material 400 is strip-shaped, the first support portion 11 supports the first material 300 below, and the second support portion 12 supports the second material 400 below.

[0045] Please see Figures 3 to 5 In some embodiments, the first mold core 10 has a first molding surface 13, and the second mold core 20 has a second molding surface 21. The second molding surface 21 is in contact with the surfaces of the first material 300 and the second material 400. The second molding surface 21 and the first molding surface 13 are configured to surround the first material 300 and the second material 400 to form a cavity 50, which is used to form the connector 200. The second mold core 20 has an injection port 23, which communicates with the cavity 50.

[0046] For example, the first molding surface 13 is located on the upper surface of the first mold core 10, and the second molding surface 21 is located on the lower surface of the second mold core 20. During injection molding, the first material 300 and the second material 400 are located between the first molding surface 13 and the second molding surface 21, and a gap is formed between the first material 300 and the second material 400 to form the cavity 50. Molten filler can enter the cavity 50 through the injection port 23 and contact the first material 300 and the second material 400, thereby forming a connector 200 to connect the first material 300 and the second material 400.

[0047] Please see Figure 5 and Figure 6In some embodiments, the second forming surface 21 is provided with a flow channel 22, which, together with the surface of the first material 300, forms a flow channel 60. Specifically, the wall of the flow channel 22, together with the upper surface of the first material 300, forms the flow channel 60. For illustrative purposes, Figure 6 The sectional view only shows the fit between the drainage channel 22 and the first mold core 10, the first material 300, and the second material 400, and does not show the overall cross-section of the second mold core 20 in the X direction.

[0048] The flow channel 60 includes a first region 61, a second region 62, and a third region 63 that are interconnected. The first region 61 is connected to the injection port 23, which is used to allow molten filler to flow into the flow channel 60. The second region 62 is connected to the cavity 50. The second region 62 and the first region 61 have a first connecting port 64, and the third region 63 and the first region 61 have a second connecting port 65. The cross-sectional area of ​​the first connecting port 64 is smaller than the cross-sectional area of ​​the second connecting port 65. Figure 6 The dashed lines in the diagram are used to indicate the positions of the first connecting port 64 and the second connecting port 65.

[0049] At the start of injection molding, the filler material that arrives at the injection port 23 first has a significantly lower temperature. This filler material that arrives at the injection port 23 first is called cold material. Cold material can cause defects such as weld lines, plastic cracking, and cold slug head during injection molding, resulting in a decrease in injection molding quality.

[0050] After the molten filler enters the first region 61 through the injection port 23, part of it enters the second region 62 through the first connecting port 64, and another part enters the third region 63 through the second connecting port 65. Since the first connecting port 64 is smaller than the second connecting port 65, the resistance to the filler at the second connecting port 65 is less, allowing most of the filler entering the first region 61 to preferentially flow to the third region 63 via the second connecting port 65. Once the third region 63 is filled with filler, the filler entering the first region 61 can more easily enter the second region 62 via the first connecting port 64, and then flow into the cavity 50. This allows most of the cold material that enters the first region 61 to flow to the third region 63 first, reducing defects such as weld lines, plastic cracking, and cold slug heads caused by cold material entering the cavity 50, thus improving the injection molding quality.

[0051] In some embodiments, the molten filler is molten plastic.

[0052] Please see Figure 7 , Figure 7 The diagram shows the outline of the drainage channel 60. In some embodiments, the height H2 of the second region 62 is less than the height H1 of the first region 61, and the height H3 of the third region 63 is greater than or equal to the height H1 of the first region 61. The height direction is the X direction shown in the figure.

[0053] In related technologies, molten plastics and other polymer melts are non-Newtonian fluids. Molten plastics themselves have viscosity; the higher the viscosity, the greater the flow resistance. During plastic filling, areas with greater fill thickness have lower flow resistance and are easier to fill. Because plastic is a poor conductor of heat, areas with greater fill thickness are less likely to dissipate heat, meaning that the temperature is less likely to drop with greater fill thickness. In areas with thinner fill thickness, flow resistance is greater, plastic flow is less efficient, and it cools more easily, leading to filling defects.

[0054] Please see Figure 6 The arrows in the diagram indicate the flow direction of the filler material entering the flow channel 60 from the injection port 23. In the injection mold 100 of this embodiment, the higher the region, the greater the thickness of the molten filler. The molten filler preferentially fills the region with greater thickness and lower flow resistance, that is, some of the cold material is first diverted to the third region 63. When the third region 63 is insufficient to accommodate the filler material from the first region 61, the filler material in the third region 63 flows back to the second region 62. During the backflow process, the material changes abruptly from a region with greater thickness to a region with less thickness. Due to the abrupt change in the thickness of the filler material, the filling resistance increases, forming a viscous heating effect, which causes the local temperature of the filler material to rise, thereby reducing filling defects. At the same time, the shear thinning effect formed by the mutual shearing of the two filler materials flowing in different directions accelerates the filling of the filler material, thereby ensuring that the filler material remains in a high-temperature molten state during the filling process, making the crystal growth more uniform and the molecular arrangement more stable, thus improving the injection molding performance.

[0055] Viscous heating refers to the heat generated during fluid flow due to the viscosity of the fluid. When a fluid flows in a pipe or container, internal friction generates heat; this phenomenon is called viscous heating. Shear thinning refers to the property of a fluid's viscosity decreasing as the shear rate increases.

[0056] By utilizing the viscous heating effect and the shear thinning effect, the molten filler can be easily kept in a high-temperature molten state during the filling process, thereby increasing the flow rate of the filler and improving the injection molding quality.

[0057] Please see Figure 7 and Figure 8In some embodiments, the width W1 at the first connecting port 64 is smaller than the width W2 at the second connecting port 65, and the height at the first connecting port 64 is smaller than the height at the second connecting port 65, so that the second connecting port 65 is larger than the first connecting port 64. For example, the width W1 at the first connecting port 64 is 3.08 mm, the width W2 at the second connecting port 65 is 6 mm, and the width direction is the Y direction shown in the figure; the height H4 at the first connecting port 64 is 2.2 mm, and the height H5 at the second connecting port 65 is 3 mm.

[0058] In some embodiments, the height H4 at the first connection port 64 is equal to the height H2 of the second region 62, and the height H5 at the second connection port 65 is equal to the height H1 of the first region 61.

[0059] In some embodiments, the volume of the third region 63 is greater than the volume of the second region 62. Compared to the second region 62, the third region 63 has more space to accommodate molten filler, making it easier for the filler from the first region 61 to enter the third region 63. This facilitates the filling of the cold material at the front end during injection into the third region 63, reducing the amount of cold material entering the cavity 50.

[0060] Please see Figure 6 In some embodiments, the second region 62 and the third region 63 are located on opposite sides of the first region 61. After the molten filler fills the third region 63, a portion of the filler in the third region 63 flows to the first region 61 and the second region 62, while the filler in the first region 61 continues to flow to the third region 63. This causes the two filler flows to move in opposite directions, thereby generating a shear-thinning effect that accelerates the filler filling process and ensures that the filler remains in a high-temperature molten state during the filling process, which is beneficial for more uniform crystal growth.

[0061] Please see Figure 6 In some embodiments, the height of the drainage channel 60 is higher than the height of the cavity 50, and the drainage channel 60 is configured to guide the molten filler into the cavity 50 along the direction of gravity. The height direction is the X direction shown in the figure. Here, "the height of the drainage channel 60 is higher than the height of the cavity 50" means that in the X direction, the height of the lowest position of the drainage channel 60 is higher than the height of the cavity 50.

[0062] By utilizing the property that the filler can flow downwards under the action of gravity, the flow rate of the filler into the cavity 50 is increased, so that the cavity 50 can be filled as quickly as possible, thereby improving injection molding efficiency.

[0063] In some embodiments, the cross-sectional area of ​​the third region 63 gradually increases in the direction opposite to the second region 62. Starting from the location of the second connection port 65, the cross-section of the third region 63 gradually increases, further reducing the flow resistance encountered by the filler flowing into the third region 63, making it easier for the molten filler through the second connection port 65 to flow into the third region 63, and further reducing the amount of cold material entering the cavity 50.

[0064] Please see Figure 1 , Figure 2 and Figure 9 In some embodiments, the injection mold 100 includes a heating element 70. The heating element 70 is provided with a hot runner 71, which includes an injection nozzle 711 for conveying molten filler material. The injection nozzle 711 is connected to the injection port 23.

[0065] When the molten filler passes through the hot runner 71, the heating element 70 will continue to heat the filler, which helps to maintain a certain temperature of the filler. This makes it less likely for the filler to cool down before entering the runner 60 and the cavity 50, thereby improving the injection molding quality.

[0066] In some embodiments, the hot runner 71 has an inlet 712 for molten filler to enter the hot runner 71. For example, the inlet 712 is located at the top of the heating element 70 and the injection nozzle 711 is located at the bottom of the heating element 70, thereby facilitating the downward flow of filler to the injection nozzle 711.

[0067] Please see Figure 9 In some embodiments, the hot runner 71 includes a main runner 713 and a plurality of branch runners 714, the main runner 713 and the branch runners 714 being connected, and each branch runner 714 having an injection nozzle 711. A plurality of drainage runners 60 are provided, and each injection nozzle 711 is connected to one of the drainage runners 60.

[0068] Multiple branch channels 714 can divert the filler in the main channel 713 to different injection nozzles 711, and inject the filler into multiple drainage channels 60 through multiple injection nozzles 711, thereby facilitating the injection of filler into the cavity 50 from multiple drainage channels 60 and improving injection molding efficiency.

[0069] Please see Figure 1 In some embodiments, the injection mold 100 includes a fixing seat 80, which is disposed above the second mold core 20. The fixing seat 80 has a mounting groove, the heating element 70 is disposed in the mounting groove, and the hot runner 71 passes through the fixing seat 80.

[0070] The fixed base 80 can support and install the heating element 70, so that the molten filler can flow from the top of the second mold core 20 to the flow channel 60 along the hot runner 71 under the action of gravity, which is beneficial to improve the flow rate of the filler and improve the injection molding efficiency.

[0071] Please see Figure 9 In some embodiments, the injection mold 100 includes at least one set of positioning members 90, each set of positioning members 90 for clamping and fixing the first material 300 and the second material 400. Each set of positioning members 90 includes two opposing positioning members 90, which are disposed on the first mold core 10 and are movable in a direction toward or away from each other to clamp or release the first material 300 and the second material 400. For example, the positioning member 90 is a slider movably disposed on the first mold core 10.

[0072] The positioning element 90 can clamp and fix the first material 300 and the second material 400, improving the stability of the first material 300 and the second material 400 during injection molding and improving the dimensional accuracy of injection molding. By moving the positioning element 90, the two opposing positioning elements 90 can be moved away from each other, thereby facilitating the release of the fixation of the first material 300 and the second material 400.

[0073] Furthermore, those skilled in the art should recognize that the above embodiments are merely illustrative of this application and are not intended to limit this application. Any appropriate changes and variations made to the above embodiments within the essential spirit and scope of this application fall within the scope of this application's disclosure.

Claims

1. An injection mold characterized in that, A mold for injection molding a connector for connecting a first material and a second material, the mold comprising: a first core for supporting the first material and the second material, the first core having a first molding surface; a second core disposed on the first core, the second core having a second molding surface, the second molding surface being in contact with a surface of the first material and a surface of the second material, the second molding surface and the first molding surface being configured to enclose a cavity with the first material and the second material, the cavity being used for forming the connector; the second molding surface being provided with a flow guide groove, the flow guide groove and the surface of the first material enclosing a flow guide runner; the flow guide runner comprising a first region, a second region and a third region in communication with each other; the second core having an injection port, the injection port being in communication with the first region; the second region being in communication with the cavity, the second region and the first region having a first communication port therebetween, the third region and the first region having a second communication port therebetween, the cross-sectional area of the first communication port being smaller than the cross-sectional area of the second communication port.

2. The injection mold of claim 1, wherein, the height of the second region being smaller than the height of the first region, the height of the third region being greater than or equal to the height of the first region.

3. The injection mold of claim 1, wherein, the volume of the third region being greater than the volume of the second region.

4. The injection mold of claim 1, wherein, the second region and the third region being disposed on opposite sides of the first region.

5. The injection mold of claim 1, wherein, the height of the flow guide runner being higher than the height of the cavity, the flow guide runner being configured to guide the molten filling material to flow into the cavity along the direction of gravity.

6. The injection mold of claim 1, wherein, in a direction away from the second region, the cross-sectional area of the third region gradually increases.

7. The injection mold of claim 1, wherein, the mold comprising a heating member; the heating member being provided with a hot runner, the hot runner comprising an injection nozzle, the hot runner being used for conveying the molten filling material, the injection nozzle being in butt joint communication with the injection port.

8. The injection mold of claim 7, wherein, the hot runner comprising a main runner and a plurality of branch runners, the main runner being in communication with the branch runners, each of the branch runners having the injection nozzle; the flow guide runner being provided with a plurality of flow guide runners, each of the injection nozzles being in butt joint communication with one of the flow guide runners.

9. The injection mold of claim 7, wherein, the mold comprising a fixing seat, the fixing seat being disposed above the second core, the fixing seat having a mounting groove, the heating member being disposed in the mounting groove, and the hot runner penetrating through the fixing seat.

10. The injection mold of claim 1, wherein, the mold comprising at least one set of positioning members, each set of the positioning members being used for clamping and fixing the first material and the second material; each set of the positioning members comprising two oppositely disposed positioning members, the positioning members being disposed on the first core and being capable of moving towards each other or away from each other to clamp or release the first material and the second material.

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