Color mixing molding apparatus and molding method for multi-color injection molded product

Abstract

This invention discloses a color mixing molding processing equipment and method for multi-color injection molded parts, relating to the field of injection molding technology. This equipment and method, through the cooperation of a mold closing assembly and a transmission limiting component, enables the sub-mold and the closing mother mold to achieve mold separation and closing, realizing multi-color injection molding operations. Simultaneously, through the setting of an inner ring frame, during subsequent injection operations after mold separation, the cooperation of a drive motor and a drive gear platen enables the inner ring frame and the sub-mold to rotate, adjusting the angle of the internally molded injection parts, followed by mold closing and injection operations until the multi-color injection molded parts are formed. This allows the equipment to adjust the position and angle of different materials according to the needs of multi-color injection molded parts, improving the equipment's performance and applicability. Furthermore, the mold closing assembly ensures efficient material injection.

Description

Technical Field

[0001] This invention relates to the field of injection molding technology, specifically to color mixing molding equipment and molding method for multi-color injection molded parts. Background Technology

[0002] Multicolor injection molding refers to the process of injecting two or more different materials into the same mold, thereby creating injection-molded parts made of two or more materials. Most of the materials are different colors, and some have different hardness, which improves the product's aesthetics and assembly performance. Traditional multicolor injection molding methods mostly use rotary molds to achieve the separation, closing, and conversion of the master mold and the child mold. However, when there is a lot of material, it is inconvenient to convert through this rotary method, which reduces the molding efficiency of the equipment and can easily affect the material cutting. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a color mixing molding processing equipment and molding method for multi-color injection molded parts, which solves the problem of the cumbersome rotary conversion mold closing method when applicable to injection molding of various materials.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a color mixing molding processing equipment for multi-color injection molded parts, comprising a machine body, with slides fixedly installed on both sides of the top surface of the machine body, a driving hydraulic cylinder fixedly installed on the inner side of one end of the machine body, and mold closing assemblies respectively provided on both sides of the top surface of the machine body. The mold closing assembly includes a positioning plate frame and a limiting plate frame. The positioning plate frame is fixedly installed on one side of the top surface of the machine body, and a female mold assembly is fixedly installed inside the positioning plate frame. The limiting plate frame is slidably installed on the other side of the top surface of the machine body, and its outer side is fixedly connected to the end of the driving hydraulic cylinder. A sub-mold is provided on the inner side of the limiting plate frame, and a transmission limiting component is provided between the sub-mold and the limiting plate frame. An ejection assembly is provided inside the sub-mold.

[0005] Preferably, the transmission limiting component includes a limiting ring frame, the limiting plate frame has a concave groove inside, and sliders are fixedly installed on both sides of the limiting ring frame, and are slidably installed inside the limiting plate frame through the sliders. An inner ring frame is rotatably installed inside the limiting ring frame, a drive motor is fixedly installed on the outer side of the limiting ring frame, and a drive gear is fixedly sleeved at the output end of the drive motor. A transmission gear is fixedly installed on the outer side of the inner ring frame, and the transmission gear and the drive gear mesh with each other. A push hydraulic cylinder is fixedly installed on the outer side of the limiting plate frame, and the end of the push hydraulic cylinder is fixedly connected to the outer side of the limiting ring frame. The sub-mold is fixedly installed on the outer side of the inner ring frame.

[0006] Preferably, the outer side of the inner ring frame extends beyond the limiting ring frame, and a distance is left between the inner side of the sub-mold and the limiting ring frame, and the inner ring frame and the limiting ring frame are rotatably connected through the cooperation of the inner ring frame.

[0007] Preferably, the bottom sides of the limiting plate frame are symmetrically provided with sliding grooves, and the limiting plate frame is slidably installed on one side of the top surface of the machine body through the cooperation of the sliding grooves and the sliding frame.

[0008] Preferably, the installation position of the sub-mold corresponds to the mother mold assembly fixedly installed inside the positioning plate frame.

[0009] Preferably, the ejection assembly includes an ejection plate, which is slidably disposed inside the sub-mold, with its outer side flush with the inner bottom of the sub-mold. Ejector rods are slidably installed on both sides of the interior of the sub-mold, with one end of each ejector rod fixedly connected to the inner ends of the ejection plate. A return spring is sleeved on the outer side of each ejector rod, and a top plate is fixedly installed on the other end of each ejector rod. The top plate is slidably disposed inside the inner ring frame and the limiting ring frame via the ejector rods on both sides, with a distance between the top plate and the limiting plate frame.

[0010] Preferably, the ejection assembly further includes an ejection hydraulic cylinder, the limiting plate frame has an ejection hole inside, a positioning frame is fixedly installed inside the ejection hole, the ejection hydraulic cylinder is fixedly installed inside the limiting plate frame, and the installation position of the ejection hydraulic cylinder corresponds to the installation position of the top plate.

[0011] Preferably, the master mold assembly includes several master molds for mold closing, several mounting brackets are fixedly installed on the inner side of the positioning plate frame, and several positioning holes are opened inside the mounting brackets. Positioning screws are provided around the inner perimeter of the several master molds for mold closing, and are respectively fixedly installed on the inner side of the positioning plate frame through corresponding mounting brackets. Several injection heads corresponding to the master molds for mold closing are fixedly installed inside the positioning plate frame, and a heating module is fixedly installed on the inner side of the positioning plate frame.

[0012] This invention also discloses a method for molding multi-color injection molded parts using a color mixing molding processing equipment, specifically including the following steps:

[0013] S1. Raw material preparation: First, the raw materials required for multi-color injection molding are hot-melted. Then, through the setting of the mold closing assembly, the raw materials are injected into the corresponding female mold assembly through the corresponding screw injection molding machine.

[0014] S2, multi-color injection molding, through the mold closing assembly and the transmission limiting component between the sub-mold and the limiting plate frame, the raw materials of different colors are injected in sequence.

[0015] S3. Cooling and unloading: After the raw material is injected into the mold, the cooling module is used to cool the molded part, and then the part is ejected through the ejection assembly.

[0016] Preferably, when the raw material is injected into the master mold assembly in step S1, the internal temperature of the raw material is kept constant to avoid cooling and affecting subsequent injections.

[0017] Beneficial effects

[0018] This invention provides a color mixing molding processing equipment and molding method for multi-color injection molded parts. Compared with the prior art, it has the following advantages:

[0019] (1) The color mixing molding processing equipment and molding method used for multi-color injection molded parts, through the cooperation of the mold closing component and the transmission limiting component, can drive the sub-mold and the corresponding mold closing mother mold to achieve mold separation and mold closing, so as to realize the injection molding operation of multi-color injection molded parts. At the same time, through the inner ring frame provided inside the limiting ring frame, when performing subsequent injection molding operations after mold separation, through the cooperation of the drive motor and the drive gear plate, the inner ring frame and the sub-mold can be driven to rotate, and the angle of the internally formed injection molded parts can be adjusted. Then, the mold closing and injection operations are carried out until the multi-color injection molded parts are formed. This allows the equipment to adjust the position and angle of different materials according to the needs of multi-color injection molded parts, thereby improving the equipment's performance and applicability. At the same time, the setting of the mold closing component ensures the injection efficiency of the materials.

[0020] (2) The color mixing molding equipment and molding method used for the multi-color injection molded parts, through the setting of the ejection component, after the multi-color injection molded parts are cooled and formed, the sub-mold and the internal molded parts are moved to the position of the ejection hole by the limiting ring frame, and then ejected by the cooperation of the ejection hydraulic cylinder, so that the top plate is pressed and pushes the ejector rods on both sides inward, so that the ejection plate slides outward and ejects the molded parts. After the ejection hydraulic cylinder is reset, the ejector rods on both sides and the ejection plate are reset by the reset spring body. During the ejection process, the ejection plate contacts the surface of the molded parts, which can ensure the ejection effect of the molded parts, and at the same time, it can improve the protection of the molded parts compared with the existing ejector pins, and avoid the occurrence of dents during the ejection process. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the positioning plate frame structure of the present invention;

[0023] Figure 3 For the present invention Figure 2 Explosion structure diagram;

[0024] Figure 4This is a schematic diagram of the limiting plate frame and the body structure of the present invention;

[0025] Figure 5 This is a magnified structural diagram of point A in the present invention;

[0026] Figure 6 This is a schematic diagram of the limiting plate frame structure of the present invention;

[0027] Figure 7 For the present invention Figure 5 Schematic diagram of cross-section structure;

[0028] Figure 8 This is a magnified structural diagram of point B in the present invention;

[0029] Figure 9 This is a schematic diagram of the exploded structure of the limiting ring frame and the inner ring frame of the present invention;

[0030] Figure 10 This is a schematic diagram of the process of the present invention.

[0031] In the diagram: 1. Machine body; 101. Drive hydraulic cylinder; 102. Slide frame; 2. Positioning plate frame; 201. Injection head; 202. Mounting bracket; 203. Positioning hole; 3. Heating module; 4. Mold closing female mold; 401. Positioning screw; 5. Limiting plate frame; 501. Ejection hole; 502. Concave groove; 503. Slide groove; 6. Pushing hydraulic cylinder; 7. Positioning frame; 701. Ejection hydraulic cylinder; 8. Sub-mold; 9. Limiting ring frame; 901. Slider; 10. Inner ring frame; 1001. Transmission gear plate; 11. Ejection plate; 1101. Ejector rod; 1102. Return spring body; 1103. Top plate; 12. Drive motor; 1201. Drive gear plate. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figure 1-10 The present invention provides two technical solutions, specifically including the following embodiments:

[0034] Example 1:

[0035] A color mixing molding processing equipment for multi-color injection molded parts includes a machine body 1. Slides 102 are fixedly installed on both sides of the top surface of the machine body 1. A drive hydraulic cylinder 101 is fixedly installed on the inner side of one end of the machine body 1. Mold closing assemblies are respectively provided on both sides of the top surface of the machine body 1. The mold closing assembly includes a positioning plate frame 2 and a limiting plate frame 5. The positioning plate frame 2 is fixedly installed on one side of the top surface of the machine body 1, and a female mold assembly is fixedly installed inside the positioning plate frame 2. The limiting plate frame 5 is slidably installed on the other side of the top surface of the machine body 1, and its outer side is connected to the drive hydraulic cylinder 101. The end of 01 is fixedly connected. A sub-mold 8 is provided on the inner side of the limiting plate frame 5. The sub-mold 8 has a cooling module inside. The cooling module is an existing circulating cooling device. The internal injection molded part is cooled by circulating coolant. A transmission limiting component is provided between the sub-mold 8 and the limiting plate frame 5. An ejection assembly is provided inside the sub-mold 8. The transmission limiting component includes a limiting ring frame 9. A concave groove 502 is opened inside the limiting plate frame 5. Slider blocks 901 are fixedly installed on both sides of the limiting ring frame 9, and the sliding blocks 901 pass through the limiting ring frame 5. A sliding mounting is installed inside the limiting plate frame 5. An inner ring frame 10 is rotatably mounted inside the limiting ring frame 9. A drive motor 12 is fixedly mounted on the outer side of the limiting ring frame 9, and a drive gear 1201 is fixedly sleeved at the output end of the drive motor 12. A transmission gear 1001 is fixedly mounted on the outer side of the inner ring frame 10, and the transmission gear 1001 meshes with the drive gear 1201. A pushing hydraulic cylinder 6 is fixedly mounted on the outer side of the limiting plate frame 5, and the end of the pushing hydraulic cylinder 6 is fixedly connected to the outer side of the limiting ring frame 9. The mold 8 is fixedly installed on the outside of the inner ring frame 10. The outer side of the inner ring frame 10 extends beyond the limiting ring frame 9. There is a distance between the inner side of the sub-mold 8 and the limiting ring frame 9. The sub-mold 8 is rotatably connected to the limiting ring frame 9 through the cooperation of the inner ring frame 10. The bottom sides of the limiting plate frame 5 are symmetrically provided with sliding grooves 503. The limiting plate frame 5 is slidably installed on one side of the top surface of the machine body 1 through the cooperation of the sliding grooves 503 and the slide 102. The installation position of the sub-mold 8 corresponds to the mother mold assembly fixedly installed inside the positioning plate frame 2.

[0036] In this embodiment of the invention, the ejection assembly includes an ejection plate 11, which is slidably disposed inside the sub-mold 8, with its outer side flush with the inner bottom of the sub-mold 8. Ejector rods 1101 are slidably mounted on both sides of the interior of the sub-mold 8. One end of each ejector rod 1101 is fixedly connected to the inner ends of the ejection plate 11, and a return spring 1102 is sleeved on the outer side of each ejector rod 1101. A top plate 1103 is fixedly mounted on the other end of each ejector rod 1101. 103 is slidably mounted on the inner ring frame 10 and the limiting ring frame 9 through the top rods 1101 on both sides respectively. A distance is left between the top plate 1103 and the limiting plate frame 5. The ejection assembly also includes an ejection hydraulic cylinder 701. An ejection hole 501 is opened inside the limiting plate frame 5. A positioning frame 7 is fixedly installed inside the ejection hole 501. The ejection hydraulic cylinder 701 is fixedly installed inside the limiting plate frame 5. The installation position of the ejection hydraulic cylinder 701 corresponds to the installation position of the top plate 1103.

[0037] In this embodiment of the invention, the master mold assembly includes several master molds 4, several mounting brackets 202 are fixedly installed on the inner side of the positioning plate frame 2, and several positioning holes 203 are opened inside the mounting brackets 202. Positioning screws 401 are provided around the inner perimeter of the several master molds 4, and are fixedly installed on the inner side of the positioning plate frame 2 through the corresponding mounting brackets 202. Several injection heads 201 corresponding to the master molds 4 are fixedly installed inside the positioning plate frame 2. A heating module 3 is fixedly installed inside the positioning plate frame 2. The heating module 3 is an existing electric heating device, mainly used to heat the raw material during the injection molding process to avoid problems with the injection molding effect due to excessively low temperature.

[0038] This invention also discloses a method for molding multi-color injection molded parts using a color mixing molding processing equipment, specifically including the following steps:

[0039] S1. Raw material preparation: First, the raw materials required for multi-color injection molding are hot-melted. Then, through the setting of the mold closing assembly, the raw materials are injected into the corresponding female mold assembly through the corresponding screw injection molding machine.

[0040] S2, multi-color injection molding, through the mold closing assembly and the transmission limiting component provided between the sub-mold 8 and the limiting plate frame 5, the raw materials of different colors are injected in sequence.

[0041] S3. Cooling and unloading: After the raw material is injected into the mold, the cooling module is used to cool the molded part, and then the part is ejected through the ejection assembly.

[0042] In this embodiment of the invention, when the raw material is injected into the master mold assembly in S1, the internal temperature of the raw material is kept constant to avoid cooling and affecting subsequent injections.

[0043] In use, firstly, the injection molding machines containing different raw materials are connected to the corresponding injection heads 201. During injection, the sub-mold 8 is first moved to its initial position by the limiting ring 9 through the cooperation of the transmission limiting component, aligning it with the end mold closing female mold 4. Then, the limiting plate 5 is pushed by the driving hydraulic cylinder 101, causing the sub-mold 8 to close with the corresponding mold closing female mold 4. Then, the corresponding injection molding machine is started to inject the raw material into the sub-mold 8 through the injection head 201. After injection is completed, the cooling module is turned on. After the raw material is formed, the driving hydraulic cylinder... 101 resets, causing the sub-mold 8 to separate from the corresponding closing mold 4. Then, the push hydraulic cylinder 6 pushes the limiting ring 9, causing it to move the sub-mold 8 forward to the subsequent closing mold 4. A second mold closing and injection molding operation is then performed until the multi-color injection molded part is formed and the mold is separated, completing the injection molding process. Through the inner ring 10 inside the limiting ring 9, during subsequent injection molding operations after mold separation, the drive motor 12 and the drive gear 1201 can drive the inner ring 10 and the sub-mold 8 to rotate. The angle of the internally molded injection parts is adjusted, followed by mold closing and injection molding until multi-color injection molded parts are formed. This allows the equipment to adjust the position and angle of different materials according to the needs of multi-color injection molded parts, improving the equipment's performance and applicability. Simultaneously, the mold closing assembly ensures efficient material injection. Through the ejection assembly, after the multi-color injection molded parts cool and solidify, the limiting ring 9 moves the sub-mold 8 and the internal molded parts to the position of the ejection hole 501. Then... The ejection hydraulic cylinder 701, in conjunction with the ejection, causes the top plate 1103 to be pressed, pushing the ejector rods 1101 on both sides inward, causing the ejector plate 11 to slide outward and eject the molded part. After the ejection hydraulic cylinder 701 is reset, the ejector rods 1101 on both sides and the ejector plate 11 are reset by the reset spring body 1102. During the ejection process, the ejector plate 11 contacts the surface of the molded part, which can ensure the ejection effect of the molded part and improve the protection of the molded part compared with the existing ejector pins, avoiding dents and other defects during the ejection process.

[0044] Example 2:

[0045] A color mixing molding processing equipment for multi-color injection molded parts includes a machine body 1. Sliders 102 are fixedly installed on both sides of the top surface of the machine body 1. A driving hydraulic cylinder 101 is fixedly installed on the inner side of one end of the machine body 1. Mold closing assemblies are respectively provided on both sides of the top surface of the machine body 1. The mold closing assembly includes a positioning plate frame 2 and a limiting plate frame 5. The positioning plate frame 2 is fixedly installed on one side of the top surface of the machine body 1, and a female mold assembly is fixedly installed inside the positioning plate frame 2. The limiting plate frame 5 is slidably installed on the other side of the top surface of the machine body 1, and its outer side is fixedly connected to the end of the driving hydraulic cylinder 101. A sub-mold 8 is provided on the inner side of the limiting plate frame 5. The sub-mold 8 has an internal cooling module, which is a conventional circulating cooling device. It uses circulating coolant to cool the internal injection molded parts. A transmission limiting component is provided between the sub-mold 8 and the limiting plate frame 5. The limiting plate frame 5 has an ejection hole 501 inside, and a positioning frame 7 is fixedly installed inside the ejection hole 501. An ejection hydraulic cylinder 701 is fixedly installed inside the limiting plate frame 5, and its installation position corresponds to the ejector pin installed inside the sub-mold 8. The transmission limiting component includes a limiting ring frame 9. The limiting plate frame 5 has a concave groove 502 inside, and the two sides of the limiting ring frame 9... A slider 901 is fixedly installed on each side, and is slidably installed inside the limiting plate frame 5 via the slider 901. An inner ring frame 10 is rotatably installed inside the limiting ring frame 9. A drive motor 12 is fixedly installed on the outer side of the limiting ring frame 9, and a drive gear 1201 is fixedly sleeved at the output end of the drive motor 12. A transmission gear 1001 is fixedly installed on the outer side of the inner ring frame 10, and the transmission gear 1001 and the drive gear 1201 mesh with each other. A push hydraulic cylinder 6 is fixedly installed on the outer side of the limiting plate frame 5, and the end of the push hydraulic cylinder 6 is fixedly connected to the outer side of the limiting ring frame 9. The sub-mold 8 is fixedly installed on... The outer side of the inner ring frame 10 extends beyond the limiting ring frame 9. A distance is left between the inner side of the sub-mold 8 and the limiting ring frame 9. The sub-mold 8 is rotatably connected to the limiting ring frame 9 through the cooperation of the inner ring frame 10. The bottom sides of the limiting plate frame 5 are symmetrically provided with sliding grooves 503. The limiting plate frame 5 is slidably installed on one side of the top surface of the machine body 1 through the cooperation of the sliding grooves 503 and the slide 102. The installation position of the sub-mold 8 corresponds to the female mold assembly fixedly installed inside the positioning plate frame 2. The mold 8 is provided with ejector pins. The ejector pins are existing telescopic ejector rods used to realize the ejection operation of the injection molded parts.

[0046] In this embodiment of the invention, the master mold assembly includes several master molds 4, several mounting brackets 202 are fixedly installed on the inner side of the positioning plate frame 2, and several positioning holes 203 are opened inside the mounting brackets 202. Positioning screws 401 are provided around the inner perimeter of the several master molds 4, and are fixedly installed on the inner side of the positioning plate frame 2 through the corresponding mounting brackets 202. Several injection heads 201 corresponding to the master molds 4 are fixedly installed inside the positioning plate frame 2. A heating module 3 is fixedly installed inside the positioning plate frame 2. The heating module 3 is an existing electric heating device, mainly used to heat the raw material during the injection molding process to avoid problems with the injection molding effect due to excessively low temperature.

[0047] This invention also discloses a method for molding multi-color injection molded parts using a color mixing molding processing equipment, specifically including the following steps:

[0048] S1. Raw material preparation: First, the raw materials required for multi-color injection molding are hot-melted. Then, through the setting of the mold closing assembly, the raw materials are injected into the corresponding female mold assembly through the corresponding screw injection molding machine.

[0049] S2, multi-color injection molding, through the mold closing assembly and the transmission limiting component provided between the sub-mold 8 and the limiting plate frame 5, the raw materials of different colors are injected in sequence.

[0050] S3. Cooling and unloading: After the raw material is injected into the mold, the cooling module is used to cool the molded part, and then the part is ejected through the ejection assembly.

[0051] In this embodiment of the invention, when the raw material is injected into the master mold assembly in S1, the internal temperature of the raw material is kept constant to avoid cooling and affecting subsequent injections.

[0052] In use, firstly, the injection molding machines containing different raw materials are connected to the corresponding injection heads 201. During injection, the sub-mold 8 is first moved to its initial position by the transmission limiting component through the limiting ring 9, aligning it with the end mold closing female mold 4. Then, the driving hydraulic cylinder 101 pushes the limiting plate 5, causing the sub-mold 8 to close with the corresponding mold closing female mold 4. Next, the corresponding injection molding machine is started to inject the raw material into the sub-mold 8 through the injection head 201. After injection, the cooling module is turned on. After the raw material is formed, the driving hydraulic cylinder 101 is reset, causing the sub-mold 8 to separate from the corresponding mold closing female mold 4. Then, the pushing hydraulic cylinder 6 pushes the limiting ring 9, causing it to move the sub-mold 8 forward to the rear. The machine continues to close the master mold 4, and then performs a second mold closing and injection molding operation until the multi-color injection molded parts are formed and the mold is separated to complete the injection molding operation. Through the inner ring frame 10 provided inside the limiting ring frame 9, when performing subsequent injection molding operations after mold separation, the inner ring frame 10 and the sub-mold 8 can be rotated by the cooperation of the drive motor 12 and the drive gear plate 1201, so as to adjust the angle of the internally formed injection molded parts, and then perform mold closing and injection molding operations until the multi-color injection molded parts are formed. This allows the equipment to adjust the position and angle of different materials according to the needs of multi-color injection molded parts, improving the use effect and application range of the equipment. At the same time, the setting of the mold closing component ensures the injection efficiency of the material.

[0053] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0054] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0055] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A color mixing molding processing equipment for multi-color injection molded parts, comprising a machine body (1), characterized in that: The machine body (1) has a slide (102) fixedly installed on both sides of the top surface, a drive hydraulic cylinder (101) fixedly installed on the inner side of one end of the machine body (1), and mold closing components are respectively provided on both sides of the top surface of the machine body (1). The mold assembly includes a positioning plate frame (2) and a limiting plate frame (5). The positioning plate frame (2) is fixedly installed on one side of the top surface of the machine body (1), and a female mold assembly is fixedly installed inside the positioning plate frame (2). The limiting plate frame (5) is slidably installed on the other side of the top surface of the machine body (1), and its outer side is fixedly connected to the end of the driving hydraulic cylinder (101). A sub-mold (8) is provided on the inner side of the limiting plate frame (5). A transmission limiting component is provided between the sub-mold (8) and the limiting plate frame (5). An ejection assembly is provided inside the sub-mold (8). The transmission limiting component includes a limiting ring frame (9), and the limiting plate frame (5) has a concave groove (502) inside. Slider blocks (901) are fixedly installed on both sides of the limiting ring frame (9), and are slidably installed inside the limiting plate frame (5) via the sliders (901). An inner ring frame (10) is rotatably installed inside the limiting ring frame (9). A drive motor (12) is fixedly installed on the outer side of the limiting ring frame (9), and a drive gear disc (1201) is fixedly sleeved at the output end of the drive motor (12). A transmission gear is fixedly installed on the outer side of the inner ring frame (10). The transmission gear plate (1001) meshes with the drive gear plate (1201). A push hydraulic cylinder (6) is fixedly installed on the outer side of the limiting plate frame (5). The end of the push hydraulic cylinder (6) is fixedly connected to the outer side of the limiting ring frame (9). The sub-mold (8) is fixedly installed on the outer side of the inner ring frame (10). The outer side of the inner ring frame (10) extends beyond the limiting ring frame (9). A distance is left between the inner side of the sub-mold (8) and the limiting ring frame (9). The sub-mold (8) is rotatably connected to the limiting ring frame (9) through the cooperation of the inner ring frame (10). The ejection assembly includes an ejection plate (11), which is slidably disposed inside the sub-mold (8) and its outer side is flush with the inner bottom of the sub-mold (8). Ejector rods (1101) are slidably installed on both sides of the interior of the sub-mold (8). One end of the ejector rods (1101) on both sides is fixedly connected to the inner ends of the ejection plate (11). A reset spring body (1102) is sleeved on the outer side of the ejector rods (1101) on both sides. A top plate (1103) is fixedly installed on the other end of the ejector rods (1101) on both sides. The top plate (1103) is slidably disposed on the inner side of the inner ring frame (10) and the limiting ring frame (9) through the ejector rods (1101) on both sides. A distance is left between the top plate (1103) and the limiting plate frame (5). The ejection assembly also includes an ejection hydraulic cylinder (701). The limiting plate frame (5) has an ejection hole (501) inside. A positioning frame (7) is fixedly installed inside the ejection hole (501). The ejection hydraulic cylinder (701) is fixedly installed inside the limiting plate frame (5). The installation position of the ejection hydraulic cylinder (701) corresponds to the installation position of the top plate (1103). The bottom sides of the limiting plate frame (5) are symmetrically provided with sliding grooves (503), and the limiting plate frame (5) is slidably installed on one side of the top surface of the machine body (1) through the cooperation of the sliding grooves (503) and the slide frame (102). The installation position of the sub-mold (8) corresponds to the mother mold assembly fixedly installed inside the positioning plate frame (2). The master mold assembly includes several master molds (4), and several mounting brackets (202) are fixedly installed on the inner side of the positioning plate frame (2). Each mounting bracket (202) has several positioning holes (203) inside. Each of the master molds (4) has a positioning screw (401) around its inner perimeter, and each is fixedly installed on the inner side of the positioning plate frame (2) through a corresponding mounting bracket (202). Several injection heads (201) corresponding to the master molds (4) are fixedly installed inside the positioning plate frame (2). A heating module (3) is fixedly installed on the inner side of the positioning plate frame (2).

2. The method for molding multi-color injection molded parts using the color mixing molding equipment for multi-color injection molded parts according to claim 1, characterized in that, Specifically, the following steps are included: S1. Raw material preparation: First, the raw materials required for multi-color injection molding are hot-melted. Then, through the setting of the mold closing assembly, the raw materials are injected into the corresponding female mold assembly through the corresponding screw injection molding machine. S2, multi-color injection molding, through the transmission limiting component provided between the mold closing assembly and the sub-mold (8) and the limiting plate frame (5), the raw materials of different colors are injected in sequence; S3. Cooling and unloading: After the raw material is injected into the mold, the cooling module is used to cool the molded part, and then the part is ejected through the ejection assembly.

3. The method for multi-color injection molding of multi-color injection molded parts using the color mixing molding equipment according to claim 2, characterized in that: When the raw material is injected into the master mold assembly in S1, the internal temperature of the raw material is kept constant to avoid cooling and affecting subsequent injections.

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