Multi-layer co-extrusion precision metering and dispensing die

Abstract

This application relates to the field of molds, and in particular to a multi-layer co-extrusion precision metering and dispensing mold, comprising a distributor, an active column, and multiple driven columns. The distributor has a feed hole on its end face, an active cavity coaxially formed on the inner wall of the feed hole, multiple driven cavities spaced apart within the distributor, multiple connecting cavities spaced apart on the inner wall of the active cavity, multiple active grooves spaced apart on the inner wall of the active cavity, and multiple discharge holes spaced apart on the end face of the distributor. Each driven column has a driven hole on its end face, a connecting groove connecting to the driven hole, and a driven groove on the inner wall of the driven hole. The arrangement of the distributor, active column, and driven columns in this application enables the timed discharge of a fixed amount of rubber material from multiple driven holes, ensuring that the flow rates of the rubber material in each driven hole do not interfere with each other. This guarantees sufficient filling and uniform cooling of the rubber material in the cavity, improving the overall product quality pass rate. It eliminates the need for machine downtime for cleaning or mold replacement, thereby reducing production costs and time consumption.

Description

Technical Field

[0001] This application relates to the field of molds, and more particularly to a multi-layer co-extrusion precision metering and dispensing mold. Background Technology

[0002] Injection molds inject heated and molten rubber into the mold cavity under high pressure, and after cooling and solidification, the desired shape of the product is obtained. In order to improve the production efficiency of the product, the mold usually has multiple cavities. The mold inlet corresponds to and is connected to the cavity through the inlet channel. The rubber fills the cavity through the inlet channel.

[0003] During mold use, if one of the feed channels becomes blocked, the pressure of the rubber material increases, which affects the flow rate of other feed channels. This can lead to insufficient filling or uneven cooling of the rubber material in the cavity, resulting in the scrapping of the entire molded product. The machine needs to be stopped to clean the feed channels or the mold needs to be replaced, which increases the production cost and time consumption of the product. Summary of the Invention

[0004] To improve the production cost of products, this application provides a multi-layer co-extrusion precision metering and dispensing die.

[0005] This application provides a multi-layer co-extrusion precision metering and dispensing mold, which adopts the following technical solution: A multi-layer co-extrusion precision metering and dispensing die includes a distributor, a drive column, and multiple driven columns. The distributor has a feed hole on its end face for injecting rubber compound. An drive cavity for rotating the drive column is coaxially formed on the inner wall of the feed hole. The drive column has a drive hole for injecting rubber compound on its end face facing the feed hole. Multiple driven cavities for rotating the driven columns are spaced apart within the distributor and are evenly distributed around the axis of the drive column. Multiple connecting cavities are spaced apart on the inner wall of each drive cavity. Each connecting cavity corresponds to and connects to a driven cavity and the drive cavity. The inner wall of the drive hole is spaced apart. There are multiple active slots, each corresponding to and connected to a connecting cavity. The distributor end face is provided with multiple discharge holes, each corresponding to and connected to a driven cavity. The driven column end face near the discharge hole is provided with a driven hole for the flow of adhesive material. The driven column end face facing the discharge hole is provided with a connecting slot, which is connected to the driven hole. The driven hole facing the inner wall of the connecting cavity is provided with a driven slot, which penetrates the outer wall of the driven column and is connected to the connecting cavity. When the connecting cavity is connected to the active slots and the driven slots, the outer peripheral surface of the driven column abuts against the inner wall of the driven cavity and separates the connecting slots and the discharge holes.

[0006] By adopting the above technical solution, when the mold is in use, the driving column and multiple driven columns are driven to rotate. The connecting cavity connects the driving groove and the driven groove. The outer circumferential surface of the driven column abuts against the inner wall of the driven cavity and separates the connecting groove and the discharge hole. The rubber material is injected into the driving hole through the feed hole. The rubber material in the driving hole passes through the driving groove, the connecting cavity, and the driven groove in sequence and fills the entire inner cavity of the driven hole, realizing the simultaneous injection of multiple rubber materials into multiple driven holes. Then, the driving column and multiple driven columns are driven to rotate. The connecting groove connects the discharge hole and the driven hole. The outer peripheral surface presses against the inner wall of the driven cavity and separates the driven groove and the connecting cavity. The outer peripheral surface of the driving column presses against the inner wall of the driving cavity and separates the driving groove and the connecting cavity. This drives the rubber material in the driven hole to be discharged from the discharge hole through the connecting groove. This achieves timed discharge of a fixed amount of rubber material in multiple driven holes, ensuring that the flow rate of the rubber material in each driven hole does not affect each other. This ensures that the rubber material in the cavity is fully filled and cooled evenly, improving the pass rate of the molded products. There is no need to stop the machine for cleaning or replace the mold, thereby reducing the production cost and time consumption of the products.

[0007] Optionally, it also includes a driving gear and multiple driven gears. The driving gear is coaxially connected to the end of the driving column away from the feed hole. The inner wall of the driving cavity has a rotating cavity for the driving gear to rotate. The driven gears correspond one-to-one with the driven columns and are coaxially connected to the ends of the driven columns away from the connecting grooves. The inner wall of the driven cavity has a rotating cavity for the driven gear to rotate. The rotating cavity connects multiple rotating cavities, and the driving gear meshes with multiple driven gears.

[0008] By adopting the above technical solution, the driving gear meshes with multiple driven gears. Only the driving gear needs to be driven to rotate. The driving gear meshes with the driven gear and drives the driven gear to rotate. The driving gear and the driven gear correspond one-to-one to drive the driving column and the driven column to rotate, realizing the synchronous rotation of the driving column and multiple driven columns. It is not necessary to drive the driving column and multiple driven columns to rotate one by one, thereby improving the ease of use of the mold.

[0009] Optionally, a power hole is coaxially formed on the inner wall of the rotating cavity away from the drive column. The power hole penetrates the surface of the distributor along its own axis. The power hole powers the motor shaft end to be embedded and coaxially connected to the surface of the drive gear.

[0010] By adopting the above technical solution, a power hole is provided at the end of the motor and coaxially connected to the end face of the drive gear. The drive gear is driven to rotate by the motor, thereby achieving precise control over the rotation angle of the drive gear and further improving the ease of use of the mold.

[0011] Optionally, the driven gear has a drive hole on its end face facing the driven hole. The drive hole extends through both sides of the driven gear along the axis of the driven gear. The distributor surface has multiple drive cavities spaced apart. The drive cavities correspond one-to-one with the drive holes and are connected. The piston end enters the driven hole through the drive cavity and the drive hole and squeezes the rubber material from the connecting groove into the discharge hole.

[0012] By adopting the above technical solution, when the connecting groove connects the discharge hole and the driven hole, the piston end enters the driven hole through the driving chamber and the driving hole and squeezes the rubber material from the connecting groove into the discharge hole, so that the inner wall of the driven hole is not easy to have rubber material left, thus realizing the quantitative and timed discharge of the rubber material in the driven hole.

[0013] Optionally, it also includes a feed block and a module. One end of the feed block is connected to the surface of the distributor with a feed hole, and the other end of the feed block is connected to the surface of the module. The surface of the module has multiple cavities for injection molding spaced apart. The surface of the feed block has an injection port for injecting the rubber material. The injection port penetrates the surface of the feed block and connects to the feed hole in the direction close to the feed hole. The surface of the feed block facing the discharge hole has connecting channels. The connecting channels penetrate the surface of the feed block in the direction close to the module. The surface of the module facing the connecting channels has feeding channels. The feeding channels correspond one-to-one with the cavities and connect the connecting channels and the cavities.

[0014] By adopting the above technical solution, when the connecting cavity connects the active groove and the driven groove, the rubber material is injected into the active hole sequentially through the injection port and the feed hole. The rubber material in the active hole sequentially passes through the active groove, the connecting cavity, and the driven groove and fills the entire inner cavity of the driven hole, realizing the quantitative and precise distribution and injection of rubber material into multiple driven hole cavities. When the connecting groove connects the discharge hole and the driven hole, the rubber material in the driven hole sequentially enters the cavity through the connecting groove, the discharge hole, the connecting flow channel, and the feed flow channel, realizing the quantitative and precise input of rubber material into multiple cavities, ensuring that the rubber material in the cavity is fully filled and cooled evenly, improving the pass rate of the whole molded product quality, eliminating the need to stop the machine for cleaning or replacing the mold, thereby shortening the production cost and time consumption of the product.

[0015] Optionally, the diameter of the driving column is smaller than the diameter of the driving gear, and the outer circumferential surface of the driving column abuts against the inner wall of the driving cavity to form a seal.

[0016] By adopting the above technical solution, the outer peripheral surface of the active column is pressed against the inner wall of the active cavity to form a seal. When the connecting cavity connects the active groove and the driven groove, the rubber material in the active hole is injected into the driven hole through the active groove, the connecting cavity and the driven groove, making it difficult for the rubber material in the active groove to overflow from the inner wall of the active hole, thereby improving the stable distribution of the rubber material in the driven hole.

[0017] Optionally, the diameter of the driven post is smaller than the diameter of the driven gear, and the outer circumferential surface of the driven post abuts against the inner wall of the driven cavity to form a seal.

[0018] By adopting the above technical solution, the outer peripheral surface of the driven column abuts against the inner wall of the driven cavity to form a seal. When the connecting groove connects the driven hole and the discharge hole, the rubber material in the driven hole enters the cavity in sequence through the connecting groove, the discharge hole, the connecting flow channel and the feed flow channel, making it difficult for the rubber material in the connecting groove to overflow from the inner wall of the driven hole, thereby improving the accurate metering and distribution of the rubber material in the cavity, and thus improving the production quality of the product.

[0019] Optionally, the feed block is bolted to the module.

[0020] By adopting the above technical solution, the feed block can be detachably installed on the module by bolts, realizing the detachable installation between the feed block and the module, which facilitates the cleaning and replacement of the feed block, thereby improving the ease of use of the mold.

[0021] In summary, this application includes at least one of the following beneficial technical effects: The arrangement of the distributor, active column, and driven column enables the timed discharge of a fixed amount of adhesive material from multiple driven holes, ensuring that the flow rates of adhesive material in each driven hole do not affect each other. This guarantees that the adhesive material in the cavity is fully filled and cooled evenly, improving the pass rate of the molded products. There is no need to stop the machine for cleaning or mold replacement, thereby reducing the production cost and time consumption of the products. The setting of driving gear and driven gear enables synchronous rotation of driving column and multiple driven columns, eliminating the need to drive driving column and multiple driven columns one by one, thereby improving the ease of use of mold; The power hole is designed to drive the rotation angle of the drive gear via a motor, enabling precise control of the drive gear's rotation angle and further improving the ease of use of the mold. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application.

[0023] Figure 2 This is a partial cross-sectional view of an embodiment of this application.

[0024] Figure 3 This is a cross-sectional view of the feed block in an embodiment of this application.

[0025] Figure 4 This is a cross-sectional view of the distributor in an embodiment of this application, mainly showing the discharge port.

[0026] Figure 5 This is a cross-sectional view of the distributor in an embodiment of this application, mainly showing the connecting cavity.

[0027] Figure 6 This is a schematic diagram of the overall structure of the driving gear, driven gear, driving column, and driven column in the embodiments of this application.

[0028] Figure 7 This is a cross-sectional view of the distributor in an embodiment of this application, mainly showing the rotating cavity.

[0029] Explanation of reference numerals in the attached drawings: 1. Distributor; 11. Feed port; 12. Discharge port; 13. Active chamber; 14. Driven chamber; 15. Connecting chamber; 16. Rotating chamber; 17. Rotating chamber; 18. Power port; 19. Driven chamber; 2. Feed block; 21. Injection port; 22. Connecting flow channel; 3. Module; 31. Cavity; 32. Feed flow channel; 4. Active column; 41. Active hole; 42. Active groove; 5. Active gear; 6. Driven gear; 61. Drive hole; 7. Driven column; 71. Driven hole; 72. Connecting groove; 73. Driven groove. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0031] This application discloses a multi-layer co-extrusion precision metering and dispensing mold. (Refer to...) Figure 1 and Figure 2 The multi-layer co-extrusion precision metering and dispensing mold includes a distributor 1, a feed block 2, a module 3, a drive column 4, a drive gear 5, multiple driven gears 6, and multiple driven columns 7. In this embodiment, the distributor 1 is cylindrical. One end of the feed block 2 is fixed to the end face of the distributor 1 by bolts, and the other end of the feed block 2 is fixed to the surface of the module 3 by bolts. The surface of the module 3 is provided with multiple cavities 31 for injection molding at intervals. The arrangement direction of the cavities 31 is parallel to the length direction of the module 3. The surface of the feed block 2 is provided with an injection port 21 for injecting the rubber material. The injection port 21 penetrates the surface of the feed block 2 and faces the surface of the distributor 1 in the direction close to the distributor 1. The surface of the module 3 facing the feed block 2 is provided with multiple feed channels 32 for injecting the rubber material at intervals. The arrangement direction of the feed channels 32 is parallel to the width direction of the module 3. The feed channels 32 correspond one-to-one with the cavities 31 and are connected.

[0032] Reference Figure 1 and Figure 2 The end face of the feed block 2 facing the feed channel 32 is provided with multiple connecting channels 22 for injecting adhesive material. The connecting channels 22 correspond to and are connected to the feed channel 32. The connecting channels 22 penetrate the surface of the feed block 2 in the direction close to the distributor 1.

[0033] Reference Figure 3 and Figure 4The distributor 1 has a feed hole 11 for injecting adhesive material on the surface facing the injection port 21. The distributor 1 has a discharge hole 12 for discharging adhesive material on the end face facing the connecting channel 22. The discharge holes 12 are evenly distributed around the axis of the distributor 1 and surround the feed hole 11. The inner wall of the feed hole 11 has an active cavity 13 for rotating the active column 4. The axis of the active column 4 coincides with the axis of the distributor 1. The diameter of the active column 4 is equal to the inner diameter of the active cavity 13, and the outer circumference of the active column 4 abuts against the inner wall of the active cavity 13 to form a seal.

[0034] Reference Figure 3 and Figure 4 The distributor 1 has multiple driven cavities 14 spaced apart for the driven column 7 to rotate. The multiple driven cavities 14 are evenly distributed around the axis of the driving column 4. The axis of the driven column 7 and the axis of the driving column 4 are parallel to each other. The diameter of the driven column 7 is equal to the inner diameter of the driven cavity 14, and the outer circumference of the driven column 7 abuts against the inner wall of the driven cavity 14 to form a seal. The driven cavity 14 corresponds to and is connected to the discharge hole 12, and the axis of the driven cavity 14 is parallel to the axis of the discharge hole 12.

[0035] Reference Figure 4 and Figure 5 The active column 4 has an active hole 41 for injecting adhesive material on its end face facing the feed hole 11. The inner wall of the active cavity 13 has multiple connecting cavities 15 spaced apart. The multiple connecting cavities 15 are evenly distributed around the axis of the active cavity 13. The connecting cavities 15 correspond one-to-one with the driven cavities 14 and are connected to the driven cavities 14 and the active cavity 13. The inner wall of the active hole 41 has multiple active grooves 42 spaced apart. The active grooves 42 are located on the side away from the feed hole 11 in the direction of the axis of the active hole 41. The multiple active grooves 42 are evenly distributed around the axis of the active column 4. The active grooves 42 penetrate the outer wall of the active column 4 in the direction away from the axis of the active column 4, and the active grooves 42 correspond one-to-one with the connecting cavities 15 and are connected to them.

[0036] Reference Figure 4 and Figure 5 The driven column 7 has a driven hole 71 coaxially opened on the end face facing the feed block 2 for the flow of rubber material. The driven column 7 has a connecting groove 72 opened on the end face facing the discharge hole 12. The connecting groove 72 connects to the driven hole 71. The driven hole 71 has a driven groove 73 opened on the inner wall of the connecting cavity 15. The driven groove 73 penetrates the outer wall of the driven column 7 in a direction away from the axis of the driven column 7 and connects to the connecting cavity 15. The driven groove 73 is located on the side away from the connecting groove 72 in the direction of the axis of the driven hole 71.

[0037] Reference Figure 6 and Figure 7The driving gear 5 is coaxially fixed at the end of the driving column 4 away from the feed hole 11. The diameter of the driving gear 5 is larger than the diameter of the driving column 4. The inner wall of the driving cavity 13 is coaxially provided with a rotating cavity 16 for the driving gear 5 to rotate. The driven gear 6 corresponds one-to-one with the driven column 7 and is coaxially fixed at the end of the driven column 7 away from the driven hole 71. The diameter of the driven gear 6 is larger than the diameter of the driven column 7. The inner wall of the driven cavity 14 is coaxially provided with a rotating cavity 17 for the driven gear 6 to rotate. The rotating cavity 16 connects multiple rotating cavities 17, and the driving gear 5 meshes with multiple driven gears 6.

[0038] Reference Figure 5 and Figure 6 When the mold is in use, the drive gear 5 is driven to rotate, and the drive gear 5 drives multiple driven gears 6 to rotate synchronously, pushing the drive column 4 and multiple driven columns 7 to rotate. The connecting cavity 15 connects the drive groove 42 and the driven groove 73, and the outer peripheral surface of the driven column 7 abuts against the inner wall of the driven cavity 14 and separates the connecting groove 72 and the discharge hole 12. The rubber material enters the drive hole 41 through the injection port 21 and the feed hole 11. The rubber material in the drive hole 41 passes through the drive groove 42, the connecting cavity 15 and the driven groove 73 in sequence and fills the entire inner cavity of the driven hole 71, realizing the quantitative and precise distribution and injection of rubber material into the inner cavities of multiple driven holes 71.

[0039] Reference Figure 4 and Figure 6 Then, the driving gear 5 is driven to rotate, which in turn drives multiple driven gears 6 to rotate synchronously, pushing the driving column 4 and multiple driven columns 7 to rotate. The connecting groove 72 connects the discharge hole 12 and the driven hole 71. The outer peripheral surface of the driving column 4 abuts against the inner wall of the driving cavity 13 and separates the connecting cavity 15 and the driving groove 42. The outer peripheral surface of the driven column 7 abuts against the inner wall of the driven cavity 14 and separates the connecting cavity 15 and the driven groove 73. The rubber material in the driven hole 71 enters the cavity 31 in sequence through the connecting groove 72, the discharge hole 12, the connecting flow channel 22 and the feed flow channel 32. This allows for precise and quantitative distribution of the adhesive material into multiple cavities 31, ensuring sufficient filling and uniform cooling of the adhesive material within each cavity 31. This improves the overall product quality pass rate without requiring machine downtime for cleaning or mold replacement, thus reducing production costs and time consumption. Furthermore, the amount of adhesive material injected into each cavity 31 is equal to the volume of the driven hole 71. Operators only need to select a distributor 1 that matches the volume of the driven hole 71 according to the required amount of adhesive material to be injected into each cavity 31 and install it with bolts, thereby improving the versatility of the mold.

[0040] Reference Figure 2 and Figure 7The inner wall of the rotating cavity 16, away from the active column 4, is coaxially provided with a power hole 18 through which the end of the motor shaft passes. The power hole 18 passes through the surface of the distributor 1 along its own axis. The end of the motor shaft passes through the power hole 18 and is coaxially fixed to the end face of the active gear 5. The rotation angle of the active gear 5 is precisely controlled by the motor, thereby further improving the production quality of the products in the cavity 31.

[0041] Reference Figure 1 and Figure 7 The driven hole 71 extends along its own axis through both sides of the driven column 7. The driven gear 6 has a drive hole 61 coaxially opened on the end face facing the driven hole 71 for the piston to pass through. The drive hole 61 extends along its own axis through both sides of the driven gear 6. The rotating cavity 17 has a drive cavity 19 coaxially opened on the inner wall facing the drive hole 61 for the piston to pass through. The drive cavity 19 extends along its own axis through the surface of the distributor 1. The piston end can pass through the drive cavity 19 and the drive hole 61 to embed into the driven hole 71 and push the rubber material in the driven hole 71 from the connecting groove 72 into the discharge hole 12, so that the inner wall of the driven hole 71 is not easy to have rubber material left, and the rubber material in the driven hole 71 is discharged quantitatively and at time.

[0042] The implementation principle of a multi-layer co-extrusion precision metering and dispensing mold according to an embodiment of this application is as follows: When the mold is in use, the drive gear 5 is driven to rotate, which drives multiple driven gears 6 to rotate synchronously, pushing the drive column 4 and multiple driven columns 7 to rotate. The connecting cavity 15 connects the drive groove 42 and the driven groove 73, and the outer peripheral surface of the driven column 7 abuts against the inner wall of the driven cavity 14 and separates the connecting groove 72 and the discharge hole 12. The rubber material enters the drive hole 41 through the injection port 21 and the feed hole 11. The rubber material in the drive hole 41 passes through the drive groove 42, the connecting cavity 15 and the driven groove 73 in sequence and fills the entire inner cavity of the driven hole 71, realizing the precise quantitative dispensing of the rubber material into the inner cavities of multiple driven holes 71. Then, the drive gear 5 is driven to rotate, which drives multiple driven gears 6 to rotate synchronously, pushing the drive column 4 and multiple driven columns 7 to rotate. The connecting groove 72 connects the discharge hole 12 and the driven hole 71. The outer circumferential surface of the active column 4 abuts against the inner wall of the active cavity 13 and separates the connecting cavity 15 and the active groove 42. The outer circumferential surface of the driven column 7 abuts against the inner wall of the driven cavity 14 and separates the connecting cavity 15 and the driven groove 73. The rubber material in the driven hole 71 enters the cavity 31 sequentially through the connecting groove 72, the discharge hole 12, the connecting flow channel 22 and the feed flow channel 32, realizing the quantitative and precise distribution and injection of rubber material in multiple cavities 31. This ensures that the rubber material in the cavity 31 is fully filled and cooled evenly, improving the pass rate of the whole mold product. There is no need to stop the machine for cleaning or replace the mold, thereby shortening the production cost and time consumption of the product. Moreover, the amount of rubber material injected into the cavity 31 is equal to the volume of the cavity of the driven hole 71. The operator only needs to select the distributor 1 that matches the volume of the cavity of the driven hole 71 according to the required amount of rubber material in the cavity 31 and install it with bolts, thereby improving the versatility of the mold.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A multi-layer co-extrusion precision metering and dispensing die, characterized in that: The assembly includes a distributor (1), an active column (4), and multiple driven columns (7). The distributor (1) has a feed hole (11) on its end face for injecting adhesive. The inner wall of the feed hole (11) has an active cavity (13) coaxially formed for the rotation of the active column (4). The end face of the active column (4) facing the feed hole (11) has an active hole (41) for injecting adhesive. Multiple driven cavities (14) for the rotation of the driven columns (7) are spaced apart within the distributor (1). These driven cavities (14) are evenly distributed around the axis of the active column (4). Multiple connecting cavities (15) are spaced apart on the inner wall of the active cavity (13). Each connecting cavity (15) corresponds to and connects with one of the driven cavities (14) and the active cavity (13). Multiple active grooves (42) are spaced apart on the inner wall of the active hole (41). Each part of the distributor (1) corresponds to and is connected to the connecting cavity (15). The end face of the distributor (1) is provided with multiple discharge holes (12) spaced apart. Each discharge hole (12) corresponds to and is connected to the driven cavity (14). The end face of the driven column (7) near the discharge hole (12) is provided with a driven hole (71) for the flow of adhesive material. The end face of the driven column (7) facing the discharge hole (12) is provided with a connecting groove (72). The driven hole (71) is connected to the inner wall of the connecting cavity (15), and the driven hole (71) is provided with a driven groove (73). The driven groove (73) penetrates the outer wall of the driven column (7) and connects to the connecting cavity (15). When the connecting cavity (15) connects the driving groove (42) and the driven groove (73), the outer peripheral surface of the driven column (7) abuts against the inner wall of the driven cavity (14) and separates the connecting groove (72) and the discharge hole (12).

2. The multi-layer co-extrusion precision metering and dispensing die according to claim 1, characterized in that: It also includes a drive gear (5) and multiple driven gears (6). The drive gear (5) is coaxially connected to the end of the drive column (4) away from the feed hole (11). The inner wall of the drive cavity (13) is provided with a rotating cavity (16) for the drive gear (5) to rotate. The driven gear (6) corresponds one-to-one with the driven column (7) and is coaxially connected to the end of the driven column (7) away from the connecting groove (72). The inner wall of the driven cavity (14) is provided with a rotating cavity (17) for the driven gear (6) to rotate. The rotating cavity (16) connects multiple rotating cavities (17), and the drive gear (5) meshes with multiple driven gears (6).

3. The multi-layer co-extrusion precision metering and dispensing die according to claim 2, characterized in that: The rotating cavity (16) has a power hole (18) coaxially opened on the inner wall away from the drive column (4). The power hole (18) penetrates the surface of the distributor (1) along its own axis. The power hole (18) is inserted into the end of the motor shaft and coaxially connected to the surface of the drive gear (5).

4. The multi-layer co-extrusion precision metering and dispensing mold according to claim 2, characterized in that: The driven gear (6) has a drive hole (61) on its end face facing the driven hole (71). The drive hole (61) passes through both sides of the driven gear (6) along its axial direction. The distributor (1) has multiple drive cavities (19) spaced apart on its surface. The drive cavities (19) correspond one-to-one with the drive holes (61) and are connected. The piston end enters the driven hole (71) through the drive cavity (19) and the drive hole (61) and squeezes the rubber material from the connecting groove (72) into the discharge hole (12).

5. The multi-layer co-extrusion precision metering and dispensing die according to claim 2, characterized in that: It also includes a feed block (2) and a module (3). One end of the feed block (2) is connected to the surface of the distributor (1) having a feed hole (11), and the other end of the feed block (2) is connected to the surface of the module (3). The surface of the module (3) is provided with a plurality of cavities (31) for injection molding. The surface of the feed block (2) is provided with an injection port (21) for injecting the adhesive material. The injection port (21) penetrates the feed block in a direction close to the feed hole (11). 2) The surface of the feed block (2) is connected to the feed hole (11). The surface of the feed block (2) facing the discharge hole (12) is provided with a connecting flow channel (22). The connecting flow channel (22) penetrates the surface of the feed block (2) towards the surface of the module (3). The surface of the module (3) facing the connecting flow channel (22) is provided with a feed flow channel (32). The feed flow channel (32) corresponds to the cavity (31) and is connected to the connecting flow channel (22) and the cavity (31).

6. The multi-layer co-extrusion precision metering and dispensing die according to claim 5, characterized in that: The diameter of the active column (4) is smaller than the diameter of the active gear (5), and the outer circumferential surface of the active column (4) abuts against the inner wall of the active cavity (13) to form a seal.

7. The multi-layer co-extrusion precision metering and dispensing die according to claim 6, characterized in that: The diameter of the driven post (7) is smaller than the diameter of the driven gear (6), and the outer circumferential surface of the driven post (7) abuts against the inner wall of the driven cavity (14) to form a seal.

8. The multi-layer co-extrusion precision metering and dispensing die according to claim 5, characterized in that: The feed block (2) is bolted to the module (3).

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