A mold with double runner dual color injection molding

Abstract

The utility model relates to two -color injection technology field especially relates to a kind of mould with double-channel two -color injection, including movable mould and the fixed mould of movable mould cooperation use, the movable mould includes first positioning member and is set to the two -color injection device of first positioning member, the fixed mould includes second positioning member and is set to the material pushing piece of second positioning member, first positioning member is with the die cavity for being set between second positioning member to product, the movable mould and fixed mould close mould, to make two -color injection device inject plastic into die cavity and pressure forming, the material pushing piece is used to protrude into die cavity and push out product.The utility model structure is compact and reasonable in design, realize double -cavity two -color injection molding work, also reduce the open-close mould times of movable mould and fixed mould, satisfy the injection molding demand of diversification, improve production efficiency and processing accuracy.

Description

Technical Field

[0001] This utility model relates to the field of two-color injection molding technology, and in particular to a mold with a dual-runner two-color injection molding process. Background Technology

[0002] Two-color injection molds, also known as dual-shot molds or two-stage injection molds, are molds that inject two different colors or materials of plastic twice or simultaneously on the same injection molding machine, resulting in products with two colors or functional layers. Assembly production can be completed in a single injection molding cycle. However, existing two-color injection molds typically consist of two sets of molds and one set of inserts to achieve two-color molding. After the first injection molding, the rear mold needs to rotate 180 degrees while the front mold remains stationary for the second injection. During the injection process, rotating and changing the injection position before re-injection can easily cause positional deviations, affecting the processing accuracy of the two-color injection mold. Furthermore, it increases the number of mold opening and closing cycles, making the operation cumbersome and time-consuming, reducing production efficiency, and failing to meet diverse injection molding needs. Summary of the Invention

[0003] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a mold with dual-flow-channel dual-color injection molding.

[0004] To achieve the above objectives, this utility model provides a mold for dual-channel, dual-color injection molding, comprising a moving mold and a fixed mold used in conjunction with the moving mold. The moving mold includes a first positioning member and a dual-color injection device disposed on the first positioning member. The fixed mold includes a second positioning member and an ejector disposed on the second positioning member. A mold cavity for manufacturing the finished product is provided between the first positioning member and the second positioning member. The moving mold and the fixed mold are closed to allow the dual-color injection device to inject plastic into the mold cavity and hold it under pressure for molding. The ejector is used to protrude into the mold cavity and push out the finished product.

[0005] Preferably, the two-color injection device includes a housing and a first injection molding assembly and a second injection molding assembly disposed on the housing. The first injection molding assembly includes a first injection chamber, a first injection hole disposed in the first injection chamber, a main injection cylinder and a sub-injection cylinder communicating with the first injection chamber, a main channel disposed in the main injection cylinder, a main injection nozzle disposed in the main channel, a sub-channel disposed in the sub-injection cylinder, and a sub-injection nozzle disposed in the sub-channel. A through hole is provided in the middle of the sub-channel, and the cylinder opening of the main injection cylinder passes through the through hole and is connected to the main channel.

[0006] Preferably, the main channel is in the shape of an arc fan blade, and multiple main injection nozzles are provided, which are arranged around the circumference of the main channel. The branch channel is in the shape of a cross, and multiple branch injection nozzles are arranged around the circumference of the branch channel.

[0007] Preferably, the second injection molding assembly includes a second injection cavity, a second injection hole disposed in the second injection cavity, a second injection cylinder connected to the second injection cavity, a second flow channel disposed in the second injection cylinder, and a second injection nozzle disposed in the second flow channel. The second flow channel is in the shape of an arc fan blade, and multiple second injection nozzles are provided, with the multiple second injection nozzles arranged around the circumference of the second flow channel.

[0008] Preferably, the first positioning member is provided with a receiving cavity for accommodating the first injection molding component and the second injection molding component, and a receiving hole communicating with the receiving cavity. The first positioning member is provided with positioning posts, and multiple positioning posts are provided, with the multiple positioning posts arranged around the circumference of the first positioning member.

[0009] Preferably, the mold cavity includes an upper template and a lower template used in conjunction with the upper template. The upper template is provided with a first upper cavity position and a second upper cavity position. The first upper cavity position is provided with a first upper forming cavity. Multiple first upper forming cavities are provided, and multiple first upper forming cavities are arranged around the circumference of the first upper cavity position. The second upper cavity position is provided with a second upper forming cavity. Multiple second upper forming cavities are provided, and multiple second upper forming cavities are arranged around the circumference of the second upper cavity position.

[0010] Preferably, the upper template is provided with a first positioning hole, and multiple first positioning holes are provided, arranged around the circumference of the upper template. The upper template is provided with an upper positioning block, and multiple upper positioning blocks are provided, arranged around the circumference of the upper template. A fastening arm is provided on the outer side of the upper template. A hinge pin is provided at the connection between the fastening arm and the upper template. A fastening groove is provided at the end of the fastening arm away from the hinge pin.

[0011] Preferably, the lower template is provided with a first lower cavity and a second lower cavity. The first lower cavity is provided with a first lower forming cavity, and multiple first lower forming cavities are provided, arranged circumferentially around the first lower cavity. The second lower cavity is provided with a second lower forming cavity, and multiple second lower forming cavities are provided, arranged circumferentially around the second lower cavity. The first lower cavity is provided with a first groove and a second groove, both of which are connected to the first lower forming cavity. The main injection nozzle is housed in the first groove, and the sub-injection nozzle is housed in the second groove. The second lower cavity is provided with a third groove, which is connected to the second lower forming cavity, and the second injection nozzle is housed in the third groove.

[0012] Preferably, the lower template is provided with a second positioning hole, and multiple second positioning holes are provided, which are arranged around the circumference of the lower template. The lower template is provided with a lower positioning groove, and multiple lower positioning grooves are arranged around the circumference of the lower template. The upper positioning block is accommodated in the lower positioning groove. A fastening block is provided on the outside of the lower template, and the fastening block is accommodated in the fastening groove.

[0013] Preferably, the top material is arranged perpendicularly to the second positioning material, and the top material passes through the second positioning material and protrudes into the first lower forming cavity and the second lower forming cavity.

[0014] The advantages of this utility model are: compact structure and reasonable design, realizing dual-cavity dual-color injection molding, while reducing the number of mold opening and closing times of the moving mold and fixed mold, meeting diversified injection molding needs, and improving production efficiency and processing accuracy. Attached Figure Description

[0015] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the internal cross-sectional structure of this utility model.

[0018] Figure 3 This is an exploded structural diagram of the present invention.

[0019] Figure 4 This is a schematic diagram of the first injection molding component of this utility model.

[0020] Figure 5 This is a schematic diagram of the second injection molding component of this utility model.

[0021] Figure 6 This is a schematic diagram of the first upper cavity structure of this utility model.

[0022] Figure 7 This is a schematic diagram of the second upper cavity structure of this utility model.

[0023] Figure 8 This is a schematic diagram of the lower template structure of this utility model.

[0024] The reference numerals in the figures include: 1—Moving mold 11—First positioning component 111—Accommodating cavity 112 – Accommodation Hole; 113 – Positioning Post 12—Two-color injection unit; 121—First injection assembly; 1211—First injection chamber 1212——First injection hole 1213——Main injection barrel 1214——Distribution barrel 1215 – Main channel; 1216 – Main injection nozzle; 1217 – Branch channel 1218 - Distributed injection nozzle; 1219 - Through hole 122—Second injection assembly; 1221—Second injection cavity; 1222—Second injection hole 1223 – Second Injection Cylinder; 1224 – Second Flow Channel; 1225 – Second Injection Nozzle 123 — Outer shell 2—Fixed mold 21—Second positioning component 22—Ejector component 3—Mold cavity 31—Upper template 311—First upper cavity position 312 – Second upper cavity position; 313 – First upper molding cavity; 314 – Second upper molding cavity 315 – First positioning hole; 316 – Upper positioning block; 317 – Fastening arm 318 - Hinge pin; 319 - Fastening groove 32—Lower template; 321—First lower cavity position; 322—Second lower cavity position 323 – First lower forming cavity; 324 – Second lower forming cavity; 325 – First groove 326 – Second groove; 327 – Third groove; 328 – Second positioning hole 329 - Lower positioning groove; 3210 - Fastening block. Detailed Implementation

[0025] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0026] The present invention will now be described in detail with reference to the accompanying drawings.

[0027] like Figures 1 to 8As shown, this utility model discloses a mold with a dual-flow, dual-color injection molding process, comprising a moving mold 1 and a fixed mold 2 used in conjunction with the moving mold 1. The moving mold 1 includes a first positioning member 11 and a dual-color injection device 12 disposed on the first positioning member 11. The fixed mold 2 includes a second positioning member 21 and an ejector member 22 disposed on the second positioning member 21. A mold cavity 3 for manufacturing the finished product is provided between the first positioning member 11 and the second positioning member 21. The moving mold 1 and the fixed mold 2 are closed so that the dual-color injection device 12 injects plastic into the mold cavity 3 and holds it under pressure to form the finished product. The ejector member 22 is used to protrude into the mold cavity 3 and push out the finished product.

[0028] During operation, molten plastic is injected into the two-color injection unit 12 via an external injection molding machine. The two-color injection unit 12 is connected to the second positioning member 21 via the first positioning member 11, which helps the two-color injection unit 12 inject two different colors or materials of plastic into the mold cavity 3 in two stages and hold them under pressure to form the finished product. This allows the ejector member 22 to protrude into the mold cavity 3 and push out the finished product, which is the shell of a smart Bluetooth item tracker. The engaging mechanism of the first positioning member 11 and the second positioning member 21 effectively ensures accurate positioning when they are closed, effectively preventing leakage due to accidental displacement. This allows the two-color injection molding to be completed within the mold cavity 3, thereby effectively reducing the number of mold opening and closing operations. This utility model has a compact structure and reasonable design, realizing two-cavity two-color injection molding while reducing the number of mold opening and closing operations for the moving mold 1 and the fixed mold 2, meeting diverse injection molding needs, and improving production efficiency and processing accuracy.

[0029] The dual-color injection device 12 of this embodiment includes a housing 123 and a first injection molding assembly 121 and a second injection molding assembly 122 disposed on the housing 123. The first injection molding assembly 121 includes a first injection chamber 1211, a first injection hole 1212 disposed on the first injection chamber 1211, a main injection cylinder 1213 and a sub-injection cylinder 1214 connected to the first injection chamber 1211, a main flow channel 1215 disposed on the main injection cylinder 1213, a main injection nozzle 1216 disposed on the main flow channel 1215, a flow channel 1217 disposed on the sub-injection cylinder 1214, and a sub-injection nozzle 1218 disposed on the flow channel 1217. A through hole 1219 is provided in the middle of the flow channel 1217, and the cylinder opening of the main injection cylinder 1213 passes through the through hole 1219 and is then connected to the main flow channel 1215. Specifically, preferably, four sub-injection cylinders 1214 are provided, and one main injection cylinder 1213 is provided. The four sub-injection cylinders 1214 are arranged circumferentially around one main injection cylinder 1213. Plastic enters the first injection chamber 1211 through the first injection hole 1212, and then flows out through the main injection cylinder 1213 and the sub-injection cylinders 1214 for injection. The cylinder opening of the main injection cylinder 1213 passes through the through hole 1219 and is connected to the main flow channel 1215, so that the main injection cylinder 1213 flows through the main flow channel 1215. The runner 1215 is connected to the main injection nozzle 1216, thereby enabling the first injection molding process. The sub-injection barrel 1214 is connected to the sub-injection nozzle 1218 through the sub-runner 1217, thereby enabling the second injection molding process. It occupies little space, has a compact structure and reasonable design, thus efficiently completing the two-color injection molding process. Both the main runner 1215 and the sub-runner 1217 adopt hot runners to reduce waste generated by cold runners.

[0030] In this embodiment, the main channel 1215 is shaped like an arc-shaped fan blade. Multiple main injection nozzles 1216 are arranged around the circumference of the main channel 1215. The branch channel 1217 is cross-shaped, and multiple branch injection nozzles 1218 are arranged around its circumference. Specifically, the branch channel 1217 has a closed cross-shaped structure, with a through hole 1219 penetrating through the center. Preferably, four branch injection nozzles 1218 are provided, each positioned at one of the four corners of the branch channel 1217. Each nozzle is connected to one of four branch injection cylinders 1214. Excess plastic can flow freely within the branch channel 1217, serving as an auxiliary injection method to ensure sufficient plastic injection volume and prevent excessive plastic overflow, thus avoiding unnecessary waste. This method offers high recycling rates, is environmentally friendly, and reduces the occurrence of insufficient plastic injection. Similarly, in cases of excessive plastic, the main channel 1215 is shaped like an arc fan blade. Compared to the cross-shaped branch channel 1217, this effectively reduces unnecessary collisions and damage between the main channel 1215 and the branch channel 1217 during operation. Preferably, four main injection nozzles 1216 are provided, each located at one of the four corners of the main channel 1215. Each of the four main injection nozzles 1216 is connected to one of the four main injection cylinders 1213. Excess plastic flows freely within the main channel 1215 as an auxiliary supplementary injection, preventing excessive plastic from overflowing and causing unnecessary plastic waste.

[0031] The second injection molding assembly 122 in this embodiment includes a second injection cavity 1221, a second injection hole 1222 disposed in the second injection cavity 1221, a second injection cylinder 1223 connected to the second injection cavity 1221, a second flow channel 1224 disposed in the second injection cylinder 1223, and a second injection nozzle 1225 disposed in the second flow channel 1224. The second flow channel 1224 is in the shape of an arc fan blade, and multiple second injection nozzles 1225 are provided, which are arranged around the circumference of the second flow channel 1224. Specifically, plastic enters the second injection cavity 1221 through the second injection hole 1222, and is then injected into the second flow channel 1224 through the second injection cylinder 1223. Preferably, four second injection nozzles 1225 are provided, which are arranged around the circumference of the second flow channel 1224. The second flow channel 1224 is in the shape of an arc fan blade, with a large contact area, which facilitates injection into the mold cavity 3 through the four second injection nozzles 1225.

[0032] In this embodiment, the first positioning member 11 is provided with a receiving cavity 111 for accommodating the first injection molding assembly 121 and the second injection molding assembly 122, and a receiving hole 112 communicating with the receiving cavity 111. The first positioning member 11 is provided with positioning posts 113, and multiple positioning posts 113 are provided, which are arranged around the circumference of the first positioning member 11. Specifically, the first positioning member 11 accommodates and places the first injection molding assembly 121 and the second injection molding assembly 122 through the receiving cavity 111. One main injection cylinder 1213 and four sub-injection cylinders 1214 pass through the receiving hole 112 and protrude from the bottom of the first positioning member 11, resulting in high placement stability. Preferably, four positioning posts 113 are provided, which are arranged around the circumference of the first positioning member 11.

[0033] In this embodiment, the mold cavity 3 includes an upper mold plate 31 and a lower mold plate 32 that cooperates with the upper mold plate 31. The upper mold plate 31 is provided with a first upper cavity position 311 and a second upper cavity position 312. The first upper cavity position 311 is provided with a first upper molding cavity 313, and multiple first upper molding cavities 313 are provided, arranged circumferentially around the first upper cavity position 311. The second upper cavity position 312 is provided with a second upper molding cavity 314, and multiple second upper molding cavities 314 are provided, arranged circumferentially around the second upper cavity position 312. Specifically, preferably, four first upper molding cavities 313 are provided, arranged circumferentially around the first upper cavity position 311. Preferably, four second upper molding cavities 314 are provided, arranged circumferentially around the second upper cavity position 312, so that the injection molding of four finished products can be completed at the same time.

[0034] In this embodiment, the upper template 31 is provided with a first positioning hole 315, and multiple first positioning holes 315 are provided, which are arranged around the circumference of the upper template 31. The upper template 31 is provided with an upper positioning block 316, and multiple upper positioning blocks 316 are provided, which are arranged around the circumference of the upper template 31. A fastening arm 317 is provided on the outer side of the upper template 31. A hinge pin 318 is provided at the connection between the fastening arm 317 and the upper template 31. A fastening groove 319 is provided at the end of the fastening arm 317 away from the hinge pin 318. Specifically, preferably, four first positioning holes 315 are provided, and the four first positioning holes 315 are arranged around the circumference of the upper template 31 so that the first positioning member 11 can pass through the four positioning pins 113 respectively through the four first positioning holes 315, thereby improving the position fixing effect between the upper template 31 and the first positioning member 11. Multiple upper positioning blocks 316 are arranged around the circumference of the upper template 31, and the fastening arm 317 swings around the hinge pin 318, which helps the fastening arm 317 to engage and fix with the lower template 32 through the fastening groove 319.

[0035] In this embodiment, the lower template 32 is provided with a first lower cavity 321 and a second lower cavity 322. The first lower cavity 321 is provided with a first lower forming cavity 323, and multiple first lower forming cavities 323 are provided, arranged circumferentially around the first lower cavity 321. The second lower cavity 322 is provided with a second lower forming cavity 324, and multiple second lower forming cavities 324 are provided, arranged circumferentially around the second lower cavity 322. The first lower cavity 321 is provided with a first groove 325 and a second groove 326, both of which are connected to the first lower forming cavity 323. The main injection nozzle 1216 is housed in the first groove 325, and the sub-injection nozzle 1218 is housed in the second groove 326. The second lower cavity 322 is provided with a third groove 327, which is connected to the second lower forming cavity 324. The second injection nozzle 1225 is housed in the third groove 327. Specifically, preferably, four first lower molding cavities 323 are provided, arranged circumferentially around the first lower cavity position 321. Preferably, four second lower molding cavities 324 are provided, arranged circumferentially around the second lower cavity position 322. This helps to complete the injection molding of four finished products at the same time, greatly improving work efficiency. The main injection nozzle 1216 is housed in the first groove 325, and the sub-injection nozzle 1218 is housed in the second groove 326. Both the first groove 325 and the second groove 326 are connected to the first lower molding cavities 323, which helps the main injection nozzle 1216 and the sub-injection nozzle 1218 to perform secondary injection molding on the first lower molding cavities 323. The third groove 327 is connected to the second lower molding cavities 324, and the second injection nozzle 1225 is housed in the third groove 327, which helps the second injection nozzle 1225 to perform secondary injection molding on the second lower molding cavities 324.

[0036] In this embodiment, the lower template 32 is provided with a second positioning hole 328, and multiple second positioning holes 328 are provided, which are arranged around the circumference of the lower template 32. The lower template 32 is provided with a lower positioning groove 329, and multiple lower positioning grooves 329 are provided, which are arranged around the circumference of the lower template 32. The upper positioning block 316 is accommodated in the lower positioning groove 329. A fastening block 3210 is provided on the outer side of the lower template 32, and the fastening block 3210 is accommodated in the fastening groove 319. Specifically, preferably, four second positioning holes 328 are provided, which are arranged around the circumference of the lower template 32. This allows the first positioning member 11 to pass through the four first positioning holes 315 first through the four positioning pins 113, and then through the four second positioning holes 328. This improves the positional fixation between the first positioning member 11, the upper template 31, and the lower template 32. Multiple lower positioning grooves 329 are arranged around the circumference of the lower template 32, allowing multiple upper positioning blocks 316 to engage and be fixed with the multiple lower positioning grooves 329 respectively. Furthermore, the fastening arm 317 swings around the hinge pin 318, which helps the fastening arm 317 to engage and be fixed with the fastening block 3210 through the fastening groove 319. This achieves positional fixation between the upper template 31 and the lower template 32, ensuring accurate positioning when the mold is closed and preventing displacement that could lead to glue leakage or misalignment.

[0037] In this embodiment, the top ejector 22 is vertically arranged with the second positioning member 21. The top ejector 22 passes through the second positioning member 21 and protrudes into the first lower molding cavity 323 and the second lower molding cavity 324. Specifically, an external drive cylinder is connected to the top ejector 22, causing the top ejector 22 to move up and down, so that the top ejector 22 passes through the second positioning member 21 and protrudes into the first lower molding cavity 323 and the second lower molding cavity 324. This helps to quickly lift and push the finished product that has completed the two-color injection molding process, resulting in high material output efficiency.

[0038] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A mold for dual-runner, two-color injection molding, comprising a moving mold and a fixed mold used in conjunction with the moving mold, characterized in that: The moving mold includes a first positioning member and a two-color injection device disposed on the first positioning member. The fixed mold includes a second positioning member and an ejector disposed on the second positioning member. A mold cavity for manufacturing the finished product is provided between the first positioning member and the second positioning member. The moving mold and the fixed mold are closed so that the two-color injection device injects plastic into the mold cavity and holds it under pressure to form the finished product. The ejector is used to protrude into the mold cavity and push out the finished product.

2. The mold with dual-runner, two-color injection molding according to claim 1, characterized in that: The two-color injection device includes a housing and a first injection assembly and a second injection assembly disposed on the housing. The first injection assembly includes a first injection chamber, a first injection hole disposed in the first injection chamber, a main injection cylinder and a sub-injection cylinder connected to the first injection chamber, a main channel disposed in the main injection cylinder, a main injection nozzle disposed in the main channel, a sub-channel disposed in the sub-injection cylinder, and a sub-injection nozzle disposed in the sub-channel. A through hole is provided in the middle of the sub-channel, and the cylinder opening of the main injection cylinder passes through the through hole and is connected to the main channel.

3. A mold with dual-runner, two-color injection molding according to claim 2, characterized in that: The main channel is in the shape of an arc fan blade, and multiple main injection nozzles are provided, which are arranged around the circumference of the main channel. The branch channel is in the shape of a cross, and multiple branch injection nozzles are arranged around the circumference of the branch channel.

4. A mold for dual-runner, dual-color injection molding according to claim 3, characterized in that: The second injection molding assembly includes a second injection cavity, a second injection hole disposed in the second injection cavity, a second injection cylinder connected to the second injection cavity, a second flow channel disposed in the second injection cylinder, and a second injection nozzle disposed in the second flow channel. The second flow channel is in the shape of an arc fan blade, and multiple second injection nozzles are provided, with multiple second injection nozzles arranged around the circumference of the second flow channel.

5. A mold for dual-runner, dual-color injection molding according to claim 2, characterized in that: The first positioning member is provided with a receiving cavity for accommodating the first injection molding assembly and the second injection molding assembly, and a receiving hole communicating with the receiving cavity. The first positioning member is provided with positioning posts, and multiple positioning posts are provided, which are arranged around the circumference of the first positioning member.

6. A mold for dual-channel, two-color injection molding according to claim 4, characterized in that: The mold cavity includes an upper template and a lower template used in conjunction with the upper template. The upper template is provided with a first upper cavity position and a second upper cavity position. The first upper cavity position is provided with a first upper forming cavity. Multiple first upper forming cavities are provided, and multiple first upper forming cavities are arranged around the circumference of the first upper cavity position. The second upper cavity position is provided with a second upper forming cavity. Multiple second upper forming cavities are provided, and multiple second upper forming cavities are arranged around the circumference of the second upper cavity position.

7. A mold for dual-runner, dual-color injection molding according to claim 6, characterized in that: The upper template is provided with a first positioning hole, and multiple first positioning holes are provided, arranged around the circumference of the upper template. The upper template is provided with an upper positioning block, and multiple upper positioning blocks are provided, arranged around the circumference of the upper template. A fastening arm is provided on the outer side of the upper template. A hinge pin is provided at the connection between the fastening arm and the upper template. A fastening groove is provided at the end of the fastening arm away from the hinge pin.

8. A mold for dual-runner, dual-color injection molding according to claim 6, characterized in that: The lower template is provided with a first lower cavity and a second lower cavity. The first lower cavity is provided with a first lower forming cavity, and multiple first lower forming cavities are provided, arranged around the circumference of the first lower cavity. The second lower cavity is provided with a second lower forming cavity, and multiple second lower forming cavities are provided, arranged around the circumference of the second lower cavity. The first lower cavity is provided with a first groove and a second groove, both of which are connected to the first lower forming cavity. The main injection nozzle is housed in the first groove, and the sub-injection nozzle is housed in the second groove. The second lower cavity is provided with a third groove, which is connected to the second lower forming cavity, and the second injection nozzle is housed in the third groove.

9. A mold for dual-runner, dual-color injection molding according to claim 7, characterized in that: The lower template is provided with a second positioning hole, and multiple second positioning holes are provided, arranged around the circumference of the lower template. The lower template is provided with a lower positioning groove, and multiple lower positioning grooves are provided, arranged around the circumference of the lower template. The upper positioning block is accommodated in the lower positioning groove. A fastening block is provided on the outside of the lower template, and the fastening block is accommodated in the fastening groove.

10. A mold for dual-runner, dual-color injection molding according to claim 8, characterized in that: The top material is perpendicular to the second positioning material, and the top material passes through the second positioning material and protrudes into the first lower forming cavity and the second lower forming cavity.

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