A two-color mold

Abstract

The present application relates to the technical field of mould, especially to a double-color mould, which comprises a bearing seat, a fixed mould seat, a lower mould and a movable mould seat, the top of the bearing seat is fixed with the fixed mould seat, the top of the fixed mould seat is fixed with the lower mould, the top of the lower mould is assembled with the movable mould seat, the bottom of the movable mould seat is fixed with an upper mould corresponding to the position of the lower mould, two injection ports are arranged on the top of the movable mould seat and communicated with the upper mould, a product is arranged on the inner side of the lower mould, and a connecting mechanism is assembled between the lower mould and the movable mould seat for connecting them. The structure design of the mould ejection mechanism makes the device convenient for ejecting the product, accelerates the work efficiency and improves the safety of the device. The structure design of the connecting mechanism and the protection mechanism makes the device connect the lower mould and the movable mould seat and protect the bottom of the bearing seat, so that the use effect is good.

Description

Technical Field

[0001] This invention relates to the field of mold technology, and more particularly to a two-color mold. Background Technology

[0002] Molds are various shapes and tools used in industrial production to obtain desired products through methods such as injection molding, blow molding, extrusion, die casting, forging, smelting, and stamping. In short, a mold is a tool used to create shaped objects. This tool is composed of various parts, and different molds are composed of different parts. It mainly achieves the shaping of objects by changing the physical state of the material being molded, and is often referred to as the "mother of industry."

[0003] Currently, two-color molds can combine two resins with different properties or colors into a single two-color product, reducing assembly and post-processing steps. This saves on connection and printing costs, enhances the product's visual appeal, and elevates its grade and added value. In addition to providing anti-slip properties and increasing friction, the combination of different plastic materials makes the product more ergonomic and provides a better feel. Two-color injection molded products offer high quality stability, easy deformation control, short molding cycles, and high output. However, in existing technologies, demolding from the lower mold is done manually or by a robot. Manual demolding is safer but less efficient, while robotic demolding, although efficient, often results in product damage due to force deviation when lifting the product upwards. Therefore, we propose a two-color mold. Summary of the Invention

[0004] The purpose of this invention is to provide a two-color mold to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A two-color mold includes a support base, a fixed mold base, a lower mold, and a moving mold base. The fixed mold base is fixed to the top of the support base, the lower mold is fixed to the top of the fixed mold base, the moving mold base is assembled to the top of the lower mold, and an upper mold corresponding to the position of the lower mold is fixed to the bottom of the moving mold base. Two injection ports are opened on the top of the moving mold base, and both injection ports are connected to the upper mold. A product is disposed on the inner side of the lower mold. A connecting mechanism is assembled between the lower mold and the moving mold base for connecting the lower mold and the moving mold base.

[0007] Preferably, the connecting mechanism includes auxiliary rods and positioning grooves. The four corners of the bottom of the moving mold base are fixed with auxiliary rods, and the four corners of the top of the lower mold are provided with positioning grooves corresponding to the positions of the auxiliary rods. The positioning grooves are in transition fit with the auxiliary rods.

[0008] Preferably, the bottom of the support is equipped with a protective mechanism for protecting the bottom of the support.

[0009] Preferably, the protective mechanism includes a base, a mounting plate, and U-shaped protrusions. The mounting plate is fixed to the bottom of the support seat, and the base is assembled to the bottom of the mounting plate. Two U-shaped protrusions are integrally fixed to both sides of the mounting plate.

[0010] Preferably, the protective mechanism further includes a top plate, a cylinder, a concave wheel, a concave annular groove, a through groove, and a rectangular protrusion. The top of each U-shaped protrusion is fixed with a top plate, and the top of each top plate is fixed with a cylinder. The output end of each cylinder passes through the top plate and is fixed with a concave wheel. A concave annular groove is formed on the outer side of each concave wheel. A through groove is formed on the top of the base at a position corresponding to the U-shaped protrusion. A rectangular protrusion is fixed on both sides inside the through groove, and the rectangular protrusion is fitted with the concave annular groove.

[0011] Preferably, a mold ejection mechanism is assembled between the fixed mold base and the lower mold, the mold ejection mechanism being used to remove the product from the lower mold.

[0012] Preferably, the ejection mechanism includes a power component and a transmission component. The power component is installed inside the fixed mold base and is used to provide a power source for the ejection mechanism. The transmission component is installed inside the power component and is used to provide power guidance for the ejection mechanism.

[0013] Preferably, the power assembly includes an L-shaped support plate, a servo motor, a worm gear, a worm wheel, a screw, an extension rod, a guide rod, a guide rail, a pin, a U-shaped plate, and a fixing column. The L-shaped support plate is fixed to the bottom of the inner side of the fixed mold base. The servo motor is fixed to the top of the L-shaped support plate. The output end of the servo motor passes through the L-shaped support plate and is fixed to a worm gear. A worm wheel is meshed with the outer side of the worm gear. A screw is fixed to one side of the worm wheel. The screw is rotatably connected to the L-shaped support plate via a bearing. An extension rod is threaded to one end of the screw. A guide rod is slidably connected to the inner side of the extension rod, offset from the screw. One end of the guide rod is fixed to the L-shaped support plate. Two rollers are rotatably connected to the bottom of one end of the extension rod via a pin. A guide rail is fixed to the bottom of the inner side of the fixed mold base, corresponding to the rollers. The bottoms of the rollers are in contact with the guide rail. A pin is fixed to the top of one end of the extension rod. A U-shaped plate is also fixed to the bottom of the inner side of the fixed mold base. A fixing column is fixed to the top of the U-shaped plate.

[0014] Preferably, the transmission assembly includes a wheel, transmission rods, partitions, strip grooves, moving blocks, guide rods, triangular plates, a central shaft, ejector rods, and auxiliary grooves. A wheel is rotatably connected to the top of the fixed column. Multiple transmission rods are rotatably connected to the top of the wheel via pins. The top of the pin is rotatably connected to one of the transmission rods. A partition is fixed at both ends of the inner side of the fixed mold base. Multiple strip grooves are evenly distributed on the top of the partitions. Moving blocks are slidably connected to the inner sides of each strip groove. The bottom of each moving block is rotatably connected to a transmission rod via pins. Guide rods are rotatably connected to the top of each moving block via pins. One end of each guide rod is rotatably connected to a triangular plate via pins. A central shaft is slidably connected to the center of the inner side of the triangular plate. The bottom of the central shaft is fixed to the fixed mold base, and the top of the central shaft is in close contact with the lower mold. Ejector rods are fixed to the three corners of the top of the triangular plate. Multiple auxiliary grooves corresponding to the positions of the ejector rods are evenly distributed on the bottom of the lower mold. The auxiliary grooves are in transition fit with the ejector rods.

[0015] It is clear without a doubt that the technical solution described above in this application can solve the technical problem that this application aims to address.

[0016] Meanwhile, through the above technical solutions, the present invention has at least the following beneficial effects:

[0017] 1. Through the structural design of the ejection mechanism, this invention facilitates the ejection of products, thereby increasing work efficiency and improving the safety of the device.

[0018] 2. Through the structural design of the connecting mechanism and the protective mechanism, this invention enables the device to connect the lower mold and the moving mold base, while also protecting the bottom of the support base, resulting in good performance. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the connection structure between the moving mold base and the auxiliary rod of the present invention;

[0022] Figure 3 This is a schematic diagram of the connection structure between the base and the mounting plate of the present invention;

[0023] Figure 4This is a schematic diagram of the connection structure between the lower mold and the fixed mold base of the present invention;

[0024] Figure 5 This is a cross-sectional structural diagram of the fixed mold base of the present invention;

[0025] Figure 6 This is a schematic diagram of the connection structure between the L-shaped support plate and the servo motor of the present invention;

[0026] Figure 7 This is a schematic diagram of the connection structure between the extension rod and the pin of the present invention;

[0027] Figure 8 This is a schematic diagram of the connection structure between the partition and the central shaft of the present invention;

[0028] Figure 9 This is a cross-sectional structural diagram of the partition of the present invention;

[0029] Figure 10 This is a schematic diagram of the connection structure between the lower mold and the auxiliary groove of the present invention.

[0030] The attached diagram lists the components represented by each number as follows:

[0031] In the diagram: 1. Bearing seat; 2. Fixed mold base; 3. Lower mold; 4. Moving mold base; 5. Injection port; 6. Product; 7. Auxiliary rod; 8. Positioning groove; 9. Base; 10. Mounting plate; 11. U-shaped protrusion; 12. Top plate; 13. Cylinder; 14. Concave wheel; 15. Concave annular groove; 16. Through groove; 17. Rectangular protrusion; 18. L-shaped support plate; 19. Servo motor; 20. Worm gear; 21. Worm wheel; 22. Screw; 23. Extension rod; 24. Guide rod; 25. Guide rail; 26. Pin shaft; 27. U-shaped plate; 28. Fixed column; 29. ​​Wheel disc; 30. Transmission rod; 31. Partition plate; 32. Strip groove; 33. Moving block; 34. Guide rod; 35. Triangular plate; 36. Central shaft; 37. Ejector rod; 38. Auxiliary groove. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0033] Example 1

[0034] Reference Figure 1-3A two-color mold includes a support base 1, a fixed mold base 2, a lower mold 3, and a moving mold base 4. The fixed mold base 2 is fixed to the top of the support base 1, the lower mold 3 is fixed to the top of the fixed mold base 2, the moving mold base 4 is assembled to the top of the lower mold 3, and an upper mold corresponding to the position of the lower mold 3 is fixed to the bottom of the moving mold base 4. Two injection ports 5 are opened on the top of the moving mold base 4, and both injection ports 5 are connected to the upper mold. A product 6 is provided on the inner side of the lower mold 3. A connecting mechanism is assembled between the lower mold 3 and the moving mold base 4 for connecting the lower mold 3 and the moving mold base 4.

[0035] The connecting mechanism includes an auxiliary rod 7 and a positioning groove 8. The four corners of the bottom of the moving mold base 4 are fixed with the auxiliary rod 7, and the four corners of the top of the lower mold 3 are provided with positioning grooves 8 corresponding to the positions of the auxiliary rod 7. The positioning grooves 8 are in transition fit with the auxiliary rod 7. The setting of the auxiliary rod 7 and the positioning grooves 8 makes the connection between the lower mold 3 and the moving mold base 4 more stable.

[0036] The bottom of the support 1 is equipped with a protective mechanism, which is used to protect the bottom of the support 1.

[0037] The protective mechanism includes a base 9, a mounting plate 10, and U-shaped protrusions 11. The mounting plate 10 is fixed to the bottom of the support seat 1, and the base 9 is mounted on the bottom of the mounting plate 10. Two U-shaped protrusions 11 are integrally fixed on both sides of the mounting plate 10. The base 9 can protect the bottom of the support seat 1.

[0038] Example 2

[0039] Further optimizations to Example 1, specifically, such as... Figure 3 As shown, the protective mechanism also includes a top plate 12, a cylinder 13, a concave wheel 14, a concave annular groove 15, a through groove 16, and a rectangular protrusion 17. The top of each U-shaped protrusion 11 is fixed with a top plate 12, and the top of each top plate 12 is fixed with a cylinder 13. The output end of each cylinder 13 passes through the top plate 12 and is fixed with a concave wheel 14. The outer side of each concave wheel 14 is provided with a concave annular groove 15. The top of the base 9 and the position corresponding to the U-shaped protrusion 11 are provided with a through groove 16. The two sides inside the through groove 16 are fixed with rectangular protrusions 17. The rectangular protrusions 17 and the concave annular groove 15 are in transition fit. When it is necessary to fasten the base 9 and the mounting plate 10, the cylinder 13 is activated. The output end of the cylinder 13 pulls the concave wheel 14. Through the concave annular groove 15, the concave wheel 14 can pull the rectangular protrusion 17, making the connection between the base 9 and the mounting plate 10 more secure.

[0040] Example 3

[0041] Further optimizations to Example 1, specifically, such as... Figure 4-10 As shown, a mold ejection mechanism is assembled between the fixed mold base 2 and the lower mold 3. The mold ejection mechanism is used to remove the product 6 from the lower mold 3.

[0042] The ejection mechanism includes a power component and a transmission component. The power component is installed inside the fixed mold base 2. The power component is used to provide a power source for the ejection mechanism. The transmission component is installed inside the power component. The transmission component is used to provide power guidance for the ejection mechanism.

[0043] The power assembly includes an L-shaped support plate 18, a servo motor 19, a worm gear 20, a worm wheel 21, a screw 22, an extension rod 23, a guide rod 24, a guide rail 25, a pin 26, a U-shaped plate 27, and a fixing column 28. The L-shaped support plate 18 is fixed to the bottom of the inner side of the fixed mold base 2. The servo motor 19 is fixed to the top of the L-shaped support plate 18. The output end of the servo motor 19 passes through the L-shaped support plate 18 and is fixed to the worm gear 20. The outer side of the worm gear 20 is meshed with the worm wheel 21. A screw is fixed to one side of the worm wheel 21. 22. The screw 22 is rotatably connected to the L-shaped support plate 18 via a bearing. One end of the screw 22 is threadedly connected to an extension rod 23. A guide rod 24 is slidably connected to the inner side of the extension rod 23, offset from the screw 22. One end of the guide rod 24 is fixed to the L-shaped support plate 18. Two rollers are rotatably connected to the bottom of one end of the extension rod 23 via a pin. A guide rail 25 is fixed to the bottom of the inner side of the fixed mold base 2, corresponding to the position of the rollers. The bottom of the rollers are in contact with the guide rail 25. The top of one end of the extension rod 23 is fixed. A pin 26 is fixed, and a U-shaped plate 27 is fixed to the bottom of the inner side of the mold base 2. A fixed column 28 is fixed to the top of the U-shaped plate 27. After the mold is demolded, the output end of the servo motor 19 is controlled to rotate in the reverse direction. The output end of the servo motor 19 drives the worm gear 20 to mesh with the worm wheel 21 to rotate, so that the screw 22 rotates synchronously. This allows the extension rod 23 to move along the outside of the guide rod 24. The extension rod 23 then pushes one of the transmission rods 30 to move through the pin 26. This causes one of the transmission rods 30 to pull the wheel 29 to rotate along the outside of the fixed column 28, thus realizing the synchronous torsional movement of multiple transmission rods 30. At the same time, since the transmission rod 30 is rotatably connected to the moving block 33 and the moving block 33 is slidably connected to the strip groove 32, multiple moving blocks 33 can move away from the central axis 36. This causes the guide rod 34 to push the triangular plate 35 to move downward along the outside of the central axis 36, thus causing the ejector rod 37 to move downward along the inside of the auxiliary groove 38 until the ejector rod 37 is reset.

[0044] The transmission assembly includes a wheel 29, transmission rods 30, partition plates 31, strip grooves 32, moving blocks 33, guide rods 34, triangular plates 35, a central shaft 36, an ejector rod 37, and an auxiliary groove 38. The wheel 29 is rotatably connected to the top of the fixed column 28. Multiple transmission rods 30 are evenly distributed and rotatably connected to the top of the wheel 29 via pins. The top of the pin shaft 26 is rotatably connected to one of the transmission rods 30. A partition plate 31 is fixed at both ends of the inner side of the fixed mold base 2. Multiple strip grooves 32 are evenly distributed on the top of the partition plate 31. Moving blocks 33 are slidably connected to the inner side of each strip groove 32. The bottom of each moving block 33 is rotatably connected to the transmission rod 30 via pins, and the top of each moving block 33 is rotatably connected to the transmission rod 30 via pins. A guide rod 34 is rotatably connected to a pin. One end of the multiple guide rods 34 is rotatably connected to a triangular plate 35 via a pin. A central shaft 36 is slidably connected to the center of the inner side of the triangular plate 35. The bottom of the central shaft 36 is fixed to the fixed mold base 2, and the top of the central shaft 36 is in close contact with the lower mold 3. Ejector rods 37 are fixed to the three corners of the top of the triangular plate 35. Multiple auxiliary grooves 38 corresponding to the positions of the ejector rods 37 are evenly distributed on the bottom of the lower mold 3. The auxiliary grooves 38 are transitionally fitted with the ejector rods 37. It can be understood that the auxiliary grooves 38 are connected to the inner side of the lower mold 3, and the ejector rods 37 block the auxiliary grooves 38 in the initial state. The top of the ejector rods 37 is flush with the bottom of the inner side of the lower mold 3.

[0045] In summary:

[0046] This invention addresses the technical problem of the prior art where, during the demolding process, the mold in the lower mold is ejected manually or by a robotic arm. Manual ejection is safe but inefficient, while robotic ejection is more efficient, but when the robotic arm lifts the product upwards, deviations in force often cause damage. The invention employs the technical solutions described in the above embodiments. Furthermore, the implementation process of the above technical solutions is as follows:

[0047] All electrical components in this device are existing technologies, and their models are only one of them. Any electrical component that can achieve the purpose of this device can be used. Connect all electrical components in the device to their compatible power supply through wires. In addition, a suitable controller should be selected according to the actual situation to meet the control requirements. The specific connection and control sequence should refer to the working principle below, and the electrical connection between each electrical component should be completed in the order of operation. The detailed connection method is a well-known technology in this field. The following mainly introduces the working principle and process, and will not explain the electrical control.

[0048] Move the device to the designated area, then connect the device to an external power source. When in use, injection molding is performed through injection port 5, so that the product 6 is formed with the cooperation of the lower mold 3 and the upper mold.

[0049] After a period of cooling, the servo motor 19 is started. The output end of the servo motor 19 drives the worm gear 20 to mesh with the worm wheel 21 and rotate, causing the screw 22 to rotate synchronously. Because the screw 22 is threadedly connected to the extension rod 23, the extension rod 23 is slidably connected to the guide rod 24, and the guide rod 24 is fixed to the L-shaped support plate 18, the extension rod 23 can move along the outside of the guide rod 24. This allows the extension rod 23 to push one of the transmission rods 30 to move through the pin 26, causing one of the transmission rods 30 to push the wheel 29 to rotate along the outside of the fixed column 28. This enables multiple transmission rods 30 to rotate synchronously. At the same time, because the transmission rod 30 is rotatably connected to the moving block 33, and the moving block 33 is slidably connected to the strip groove 32, multiple moving blocks 33 can move towards the direction closer to the central axis 36. This causes the guide rod 34 to push the triangular plate 35 to move upward along the outside of the central axis 36, thereby causing the ejector rod 37 to move upward along the inside of the auxiliary groove 38, ejecting the product 6 from the lower mold 3 and achieving rapid vertical demolding.

[0050] With the above-mentioned settings, this application will certainly solve the above-mentioned technical problems, and at the same time achieve the following technical effects:

[0051] 1. Through the structural design of the ejection mechanism, this invention facilitates the ejection of product 6, thereby increasing work efficiency and improving the safety of the device.

[0052] 2. Through the structural design of the connecting mechanism and the protective mechanism, this invention enables the device to connect the lower mold 3 and the moving mold base 4, while also protecting the bottom of the support base 1, resulting in good performance.

[0053] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0054] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.

Claims

1. A two-color mold, characterized in that, The system includes a support base (1), a fixed mold base (2), a lower mold (3), and a moving mold base (4). The top of the support base (1) is fixed with the fixed mold base (2), the top of the fixed mold base (2) is fixed with the lower mold (3), the top of the lower mold (3) is fitted with the moving mold base (4), the bottom of the moving mold base (4) is fixed with an upper mold corresponding to the position of the lower mold (3), the top of the moving mold base (4) has two injection ports (5), both of which are connected to the upper mold. The inner side of the lower mold (3) is provided with a product (6). The lower mold (3) and the product are connected to the upper mold. A connecting mechanism is assembled between the moving mold base (4) and the moving mold base (4); the connecting mechanism is used to connect the lower mold (3) and the moving mold base (4); a mold ejection mechanism is assembled between the fixed mold base (2) and the lower mold (3); the mold ejection mechanism is used to remove the product (6) from the lower mold (3); the mold ejection mechanism includes a power component and a transmission component; the power component is assembled on the inner side of the fixed mold base (2); the power component is used to provide a power source for the mold ejection mechanism; the transmission component is assembled on the inner side of the power component; the transmission component is used to provide power guidance for the mold ejection mechanism. The power assembly includes an L-shaped support plate (18), a servo motor (19), a worm (20), a worm wheel (21), a screw (22), an extension rod (23), a guide rod (24), a guide rail (25), a pin (26), a U-shaped plate (27), and a fixed column (28). The bottom of the inner side of the fixed mold base (2) is fixed with an L-shaped support plate (18), and the top of the L-shaped support plate (18) is fixed with a servo motor (19). The output end of the servo motor (19) passes through the L-shaped support plate (18) and is fixed with a worm (20). The outer side of the worm (20) is meshed with a worm wheel (21), and a screw (22) is fixed on one side of the worm wheel (21). The screw (22) is connected to the L-shaped support plate (18) through a bearing. The screw (22) is rotatably connected to an extension rod (23) at one end. A guide rod (24) is slidably connected to the inner side of the extension rod (23) and offset from the screw (22). One end of the guide rod (24) is fixed to the L-shaped support plate (18). Two rollers are rotatably connected to the bottom of one end of the extension rod (23) by a pin. A guide rail (25) is fixed to the bottom of the inner side of the fixed mold base (2) at the position corresponding to the rollers. The bottom of the rollers are in close contact with the guide rail (25). A pin (26) is fixed to the top of one end of the extension rod (23). A U-shaped plate (27) is also fixed to the bottom of the inner side of the fixed mold base (2). A fixing post (28) is fixed to the top of the U-shaped plate (27). The transmission assembly includes a wheel (29), transmission rods (30), partitions (31), strip grooves (32), moving blocks (33), guide rods (34), triangular plates (35), a central shaft (36), an ejector rod (37), and an auxiliary groove (38). The top of the fixed column (28) is rotatably connected to the wheel (29). The top of the wheel (29) is evenly distributed with multiple transmission rods (30) rotatably connected by pins. The top of the pin (26) is rotatably connected to one of the transmission rods (30). A partition (31) is fixed at both ends of the inner side of the fixed mold base (2). The top of the partition (31) is evenly distributed with multiple strip grooves (32). The inner side of each strip groove (32) is slidably connected to a moving block (33). The bottom of the moving block (33) is rotatably connected to the transmission rod (30) by a pin. The top of the moving block (33) is rotatably connected to the guide rod (34) by a pin. One end of the multiple guide rods (34) is rotatably connected to a triangular plate (35) by a pin. The center of the inner side of the triangular plate (35) is slidably connected to the center shaft (36). The bottom of the center shaft (36) is fixed to the fixed mold base (2). The top of the center shaft (36) is in close contact with the lower mold (3). The three corners of the top of the triangular plate (35) are all fixed with ejector rods (37). The bottom of the lower mold (3) is evenly distributed with multiple auxiliary grooves (38) corresponding to the positions of the ejector rods (37). The auxiliary grooves (38) are transitionally fitted with the ejector rods (37).

2. A two-color mold according to claim 1, characterized in that, The connecting mechanism includes an auxiliary rod (7) and a positioning groove (8). The four corners at the bottom of the moving mold base (4) are fixed with auxiliary rods (7), and the four corners at the top of the lower mold (3) are provided with positioning grooves (8) corresponding to the positions of the auxiliary rods (7). The positioning grooves (8) are in transition fit with the auxiliary rods (7).

3. A two-color mold according to claim 1, characterized in that, The bottom of the support (1) is equipped with a protective mechanism, which is used to protect the bottom of the support (1).

4. A two-color mold according to claim 3, characterized in that, The protective mechanism includes a base (9), a mounting plate (10) and a U-shaped protrusion (11). The bottom of the bearing seat (1) is fixed with the mounting plate (10), and the bottom of the mounting plate (10) is fitted with the base (9). Both sides of the mounting plate (10) are integrally fixed with two U-shaped protrusions (11).

5. A two-color mold according to claim 4, characterized in that, The protective mechanism also includes a top plate (12), a cylinder (13), a concave wheel (14), a concave annular groove (15), a through groove (16), and a rectangular protrusion (17). The top of each U-shaped protrusion (11) is fixed with a top plate (12), and the top of each top plate (12) is fixed with a cylinder (13). The output end of each cylinder (13) passes through the top plate (12) and is fixed with a concave wheel (14). A concave annular groove (15) is provided on the outer side of each concave wheel (14). A through groove (16) is provided on the top of the base (9) and at the position corresponding to the U-shaped protrusion (11). A rectangular protrusion (17) is fixed on both sides inside the through groove (16). The rectangular protrusion (17) and the concave annular groove (15) are in transition fit.

Images