A three-color three-station injection mold and molding process

Abstract

The invention discloses a three-color three-station injection mold and a molding process, which relate to the technical field of injection molds, and comprise the following steps: S1 mold design and manufacturing; S2 material preparation: selecting plastic materials; S3 injection molding machine debugging: adjusting the parameters of the injection molding machine; S4 mold installation and debugging: installing the three-color three-station injection mold on the injection molding machine; S5 injection molding: adding the plastic material into the hopper of the injection molding machine; S6 cooling and solidification: cooling the injection molded product to solidify and mold it; S7 demoulding and taking out: demoulding and taking out the injection molded product from the mold. The invention can obtain three automobile taillight mask products at the same time within one working cycle, thereby improving work efficiency, and does not need to set up a plurality of sub-molds and match a plurality of rotating stations, thereby reducing the production and manufacturing cost of the mold.

Description

Technical Field

[0001] The present invention relates to the technical field related to injection molds, and in particular to a three-color three-station injection mold and a molding process. Background Art

[0002] In the development process of multi-color injection molding technology, traditional multi-color injection molding usually requires multiple injection molding processes to complete the molding of different colors, which not only increases production time and cost, but also puts higher requirements on the design and manufacture of molds. For example, traditional three-color injection molding usually requires three independent molds and injection molding stations, and each station performs injection molding of one color. Traditional production methods may require multiple processes and manual operations. This method not only has high equipment costs, but is also prone to positioning errors during the production process, resulting in unstable product quality. In addition, traditional three-color injection molds also have certain limitations in demolding. Since the product may have complex structures and high surface requirements during the injection molding process, traditional demolding mechanisms are often difficult to effectively handle these problems, which can easily lead to product damage. These problems limit the application of multi-color injection molding technology in some complex products, especially in production environments that require high precision and high efficiency.

[0003] The emergence of this patented three-color three-station injection mold is aimed at solving the above problems. Through innovative mold design and injection molding process, it can achieve injection molding of three colors or three materials in one mold at the same time. This technology not only reduces production processes and manual operations, greatly improves product stability and production efficiency, but also provides a new direction for the development of injection molding technology. Summary of the invention

[0004] In order to solve the defects of the prior art, the present invention provides a three-color three-station injection mold and a molding process.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] The present invention provides a three-color three-station injection mold, comprising:

[0007] An upper mold, wherein the upper mold is arranged on the above-mentioned injection molding machine;

[0008] A lower mold, the lower mold is used to cooperate with the upper mold to generate the required three-color taillight mask under the injection molding of the injection molding machine, and the lower mold is arranged on the movable mold rotating disk of the injection molding machine to drive the lower mold to rotate;

[0009] A demoulding mechanism, which is located in the lower mold and is used to demould and separate the three-color taillight mask from the lower mold after cooling and forming;

[0010] The demoulding mechanism comprises a plurality of lifting push rods, a fixed base and a limited movable seat, the bottom end of the lifting push rod is fixedly connected to the fixed base, and the movable seat is located on the top of the fixed base and is slidably connected to the plurality of lifting push rods respectively;

[0011] Both sides of the fixed base and the limiting movable seat are provided with U-shaped notches, and the inner sides of the two notches are provided with fixed connecting seats for connecting the fixed base and the limiting movable seat. The bottom of the fixed connecting seat is provided with an oil cylinder, and the output end of the oil cylinder is fixed to the fixed connecting seat through a locking block.

[0012] As a preferred technical solution of the present invention, the upper mold includes an upper top plate, a diverter plate and a fixed mold plate, and the upper top plate, the diverter plate and the fixed mold plate are fixedly connected in sequence. The first flow channel, the second flow channel and the third flow channel are respectively arranged on both sides of the top of the upper top plate and one side of the diverter plate, and the inlet ports of the first flow channel, the second flow channel and the third flow channel respectively correspond to the first nozzle, the second nozzle and the third nozzle on the injection molding machine.

[0013] As a preferred technical solution of the present invention, the bottom end surface of the fixed mold plate is provided with three fixed module chambers equidistantly along the circumferential direction, and each of the fixed module chambers is correspondingly provided with a first mold cavity;

[0014] The first flow channel and the second flow channel have three branch flow channels respectively, and each branch flow channel corresponds to the first mold cavity in each of the fixed module cavities. The third flow channel has one and corresponds to the first mold cavity in one of the fixed module cavities.

[0015] As a preferred technical solution of the present invention, the lower mold includes a lower base plate, a support pad and a movable mold plate, the movable mold plate is fixedly arranged on the movable mold turntable of the injection molding machine, the lower base plate, the support pad and the movable mold plate are fixedly connected in sequence, three movable module chambers are opened at the top of the movable mold plate, each of the movable module chambers is detachably provided with a second mold cavity by bolts, and the second mold cavity is arranged correspondingly to the first mold cavity.

[0016] As a preferred technical solution of the present invention, positioning guide grooves are opened through the edges of both sides of the top of the second mold cavity, positioning guide blocks are arranged in the movable module cavity to cooperate with the positioning guide grooves, and side cores are fixedly arranged on both sides of the interior of the movable module cavity, and side chambers are opened on the second mold cavity corresponding to the side cores.

[0017] As a preferred technical solution of the present invention, the lifting push rods are distributed in a matrix, and the top ends of the lifting push rods pass through the movable module chamber and are placed in the through holes opened through the second mold cavity, and the top ends of the lifting push rods are flush with the inner mold surface of the second mold cavity.

[0018] As a preferred technical solution of the present invention, the oil cylinder is fixedly arranged on the top of the lower base plate, and the oil cylinder is located on the outside of the supporting cushion block.

[0019] As a preferred technical solution of the present invention, a positioning cone block is fixedly provided in the middle of the bottom end of the fixed template, and a positioning groove is provided at the top end of the movable template corresponding to the positioning cone block.

[0020] As a preferred technical solution of the present invention, a group of guide pillars are respectively arranged on one side of the fixed module chamber on the bottom surface of the fixed template, each group of the guide pillars are equidistantly distributed along the circumferential direction, and each group of the guide pillars has two guide pillars, and slots for accommodating the insertion of the guide pillars are opened on the movable template corresponding to the guide pillars.

[0021] The present invention also provides a three-color three-station injection mold forming process, comprising the following steps:

[0022] S1 Mould design and manufacturing: Design and manufacture three-color three-station injection moulds according to product requirements;

[0023] S2 Material preparation: Select plastic materials and prepare plastic granules or powder according to the color and material requirements of the product;

[0024] S3 Injection molding machine debugging: adjust the parameters of the injection molding machine to ensure that the injection molding machine can work normally and meet the requirements of three-color three-station injection molding;

[0025] S4 mold installation and debugging: install the three-color three-station injection mold on the injection molding machine to ensure that the mold is installed correctly and can work well with the injection molding machine;

[0026] S5 Injection Molding: Add plastic material into the hopper of the injection molding machine, and inject the plastic material into the mold cavity through the heating and pressurization of the injection molding machine;

[0027] S6 Cooling and solidification: After the injection molding is completed, the injection molded product needs to be cooled to solidify it;

[0028] S7 Demolding and Removal: After the injection molded product is cooled and solidified, the mold needs to be opened and the injection molded product needs to be demolded and removed from the mold.

[0029] The beneficial effects of the present invention are:

[0030] 1. This three-color three-station injection mold performs the first and second shots into the molding cavity formed by the second mold cavity and the first mold cavity through the first nozzle and the second nozzle respectively, and injects two different colors into the three stations respectively at the same time. The third shot injects the third color plastic into the molding cavity of the first station through the third nozzle. After the operation is completed, the movable platen and the fixed mold are opened, and the demoulding mechanism on the first station that completes the third shot injection molding works to eject the molded product, and then the movable platen is driven to rotate by the rotating disk of the injection molding machine, and the movable platen rotates 120° with the second mold cavity. At this time, the third shot is not performed. The demoulding mechanisms on the two injection stations do not perform the ejection action, and then the mold is closed again, and the molding cavity on the second station is subjected to the third injection molding. After the injection molding is completed, the fixed mold plate and the movable mold plate are opened, and the product is ejected and demolded by the demoulding mechanism, and then the above operation is repeated to perform the third injection molding on the third station and demold the product. Within one working cycle, three automobile taillight mask products can be obtained at the same time, which improves work efficiency, and does not need to set up multiple sub-molds and match multiple rotating stations, which can reduce the production and manufacturing cost of the mold, and does not need to be operated manually, thereby improving the stability of the product and reducing the possibility of positioning errors.

[0031] 2. In this three-color three-station injection mold, the oil cylinder pushes the fixed connecting seat to move, and the movement of the fixed connecting seat will drive the fixed base and the movable seat to move upward at the same time. The movement of the fixed base will push the jacking push rod to move upward. By setting up multiple jacking push rods and arranging them in a matrix, the injection molded product can be subjected to all-round force, and the automobile taillight mask can be directly ejected and demolded. For some products with complex structures and high surface requirements, more effective demolding can be carried out, and the possibility of damage to the product caused by the demolding process can also be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0033] Figure 1 It is a structural schematic diagram of the present invention when the fixed template and the movable template are separated;

[0034] Figure 2 It is a side view of the fixed platen and the movable platen of the present invention when the mold is closed;

[0035] Figure 3 It is a schematic diagram of the upper mold structure of the present invention;

[0036] Figure 4 It is a schematic diagram of the lower mold structure of the present invention;

[0037] Figure 5It is a schematic diagram of the internal structure of the dynamic module chamber of the present invention;

[0038] Figure 6 The present invention Figure 5 A local enlarged view of point A;

[0039] Figure 7 is a schematic diagram of the second mold cavity structure of the present invention;

[0040] Figure 8 It is a schematic diagram of the connection structure between the demoulding mechanism and the second mold cavity of the present invention;

[0041] Fig. 9 It is a structural schematic diagram of the product of the present invention when it is ejected from the second mold cavity by the ejection rod;

[0042] Fig.10 is an internal cross-sectional view of the upper mold of the present invention;

[0043] Fig.11 It is a schematic diagram of the rotation angle of the lower mold of the present invention each time.

[0044] In the figure: 01, first nozzle; 02, second nozzle; 03, third nozzle; 10, upper mold; 11, upper top plate; 12, diverter plate; 13, fixed mold plate; 14, first flow channel; 15, second flow channel; 16, third flow channel; 17, fixed module chamber; 18, first mold cavity; 19, positioning cone block; 110, guide column; 20, lower mold; 21, lower bottom plate; 22, support pad; 23, movable mold plate; 24, movable module chamber; 25, second mold cavity; 26, positioning guide groove; 27, positioning guide block; 28, side core; 29, side chamber; 210, perforation; 211, positioning groove; 212, slot; 30, demoulding mechanism; 31, lifting push rod; 32, fixed base; 33, movable seat; 34, notch; 35, fixed connecting seat; 36, oil cylinder; 37, locking block. DETAILED DESCRIPTION

[0045] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0046] Example: Figure 1-Figure 11 As shown, the present invention provides a three-color three-station injection mold, comprising:

[0047] An upper mold 10, the upper mold 10 is arranged on the above-mentioned injection molding machine;

[0048] The lower mold 20 is used to cooperate with the upper mold 10 to form the required three-color taillight mask under the injection molding of the injection molding machine, and the lower mold 20 is set on the movable mold turntable of the injection molding machine to drive the lower mold 20 to rotate;

[0049] A demoulding mechanism 30, which is located in the lower mold 20 and is used to demould and separate the three-color taillight mask from the lower mold 20 after cooling and forming;

[0050] The demoulding mechanism 30 includes a plurality of lifting push rods 31, a fixed base 32 and a limited movable seat 33. The bottom end of the lifting push rod 31 is fixedly connected to the fixed base 32. The movable seat 33 is located on the top of the fixed base 32 and is slidably connected to the plurality of lifting push rods 31 respectively.

[0051] A U-shaped notch 34 is provided on both sides of the fixed base 32 and the limiting movable seat 33, and a fixed connecting seat 35 for connecting the fixed base 32 and the limiting movable seat 33 is provided on the inner side of the two notches 34. A cylinder 36 is provided at the bottom of the fixed connecting seat 35, and the output end of the cylinder 36 is fixed to the fixed connecting seat 35 through a locking block 37.

[0052] The upper mold 10 includes an upper top plate 11, a manifold 12 and a fixed mold plate 13, which are fixedly connected in sequence. The first flow channel 14, the second flow channel 15 and the third flow channel 16 are respectively arranged on both sides of the top of the upper top plate 11 and one side of the manifold 12, and the inlet ports of the first flow channel 14, the second flow channel 15 and the third flow channel 16 correspond to the first nozzle 01, the second nozzle 02 and the third nozzle 03 on the injection molding machine respectively; the fixed mold plate 13 is fixedly connected to the upper top plate 11, the manifold 12 and the fixed mold plate 13, and the first flow channel 14, the second flow channel 15 and the third flow channel 16 are respectively arranged on the two sides of the top of the upper top plate 11 and the one side of the manifold 12. The bottom end surface is provided with three fixed module chambers 17 equidistantly along the circumferential direction, and each fixed module chamber 17 is provided with a first mold cavity 18; the first flow channel 14 and the second flow channel 15 respectively have three branch flow channels, and each branch flow channel corresponds to the first mold cavity 18 in each fixed module chamber 17, and the third flow channel 16 has one and corresponds to the first mold cavity 18 in one of the corresponding fixed module chambers 17. In actual use, the first nozzle 01 and the second nozzle 02 are used to respectively supply the second mold cavity 25 The first shot and the second shot are performed in the molding chamber formed by the first mold cavity 18, and two different colors are injected into the three stations respectively at the same time. The third shot works by injecting the third color plastic into the molding chamber of the first station through the third nozzle 03. After the operation is completed, the movable plate 23 and the fixed plate 13 are opened, and the demolding mechanism 30 on the first station that completes the third shot injection molding works to eject the molded product, and then the movable plate 23 is driven to rotate by the turntable of the injection molding machine, and the movable plate 23 rotates 120° with the second mold cavity 25. At this time, the demolding mechanisms 30 on the two stations where the third shot is not performed do not perform the ejection action, and then the mold is closed again, and the third shot injection molding is performed on the molding cavity on the second station. After the injection molding is completed, the fixed plate 13 and the movable plate 23 are opened, and the product is ejected and demolded by the demolding mechanism 30, and then the above operation is repeated to perform the third shot injection molding on the third station and demold the product. In one working cycle, three automobile taillight mask products can be obtained at the same time.

[0053] Among them, the lower mold 20 includes a lower base plate 21, a support pad 22 and a movable mold plate 23. The movable mold plate 23 is fixedly arranged on the movable mold turntable of the injection molding machine. The lower base plate 21, the support pad 22 and the movable mold plate 23 are fixedly connected in sequence. Three movable module chambers 24 are opened at the top of the movable mold plate 23. Each movable module chamber 24 is detachably provided with a second mold cavity 25 by bolts. The second mold cavity 25 is correspondingly arranged with the first mold cavity 18. The second mold cavity 25 and the first mold cavity 18 are matched to form a molding chamber for molding a car taillight mask, and the second mold cavity 25 is conveniently installed and disassembled by fixing the second mold cavity 25 in the movable module cavity 24 by bolts.

[0054] Among them, positioning guide grooves 26 are opened through the edges of both sides of the top of the second mold cavity 25, and positioning guide blocks 27 are arranged in the movable module cavity 24 to cooperate with the positioning guide grooves 26, and side cores 28 are fixedly arranged on both sides of the movable module cavity 24, and side chambers 29 are opened on the second mold cavity 25 corresponding to the side cores 28. Through the cooperation of the positioning guide grooves 26 and the positioning guide blocks 27, the second mold cavity 25 can be positioned and placed in the movable module cavity 24, and through the cooperation of the side cores 28 and the side chambers 29, the inner surface of the second mold cavity 25 can be sealed and the second mold cavity 25 can also be cooperated to form a car taillight mask with the required edge shape.

[0055] The lifting push rods 31 are arranged in a matrix, and the top ends of the lifting push rods 31 pass through the moving module chamber 24 and are placed in the through hole 210 which is opened through the second mold cavity 25, and the top ends of the lifting push rods 31 are flush with the inner mold surface of the second mold cavity 25; the oil cylinder 36 is fixedly arranged at the top end of the lower base plate 21, and the oil cylinder 36 is located on the outside of the supporting pad 22. By distributing the lifting push rods 31 in a matrix and inserting them in the second mold cavity 25, when the automobile taillight mask formed in the second mold cavity 25 is demolded, By setting a plurality of lifting push rods 31, the inner surface of the automobile taillight mask can be contacted in all directions. With the cooperation of the oil cylinder 36, the product can be subjected to all-round force, so that the taillight mask can be directly ejected and demolded from the second mold cavity 25. Moreover, the shape of some products with undercuts can be repaired under the push of the lifting push rods 31. Compared with only lifting and demolding at the corners or the middle by the push block, which causes local force on the product, it can reduce the possibility of product breaking or ejector rod breakage.

[0056] Among them, a positioning cone block 19 is fixedly provided in the middle of the bottom end of the fixed template 13, and a positioning groove 211 is provided at the top of the movable template 23 corresponding to the positioning cone block 19; a group of guide columns 110 are respectively provided on one side of the fixed module chamber 17 on the bottom surface of the fixed template 13, and each group of guide columns 110 are equidistantly distributed along the circumferential direction, and each group of guide columns 110 has two, and a slot 212 for accommodating the insertion of the guide column 110 is provided on the movable template 23 corresponding to the guide column 110. Through the cooperation of the positioning cone block 19 and the positioning groove 211, and the cooperation of the three groups of guide columns 110 and the three groups of slots 212, the fixed template 13 and the movable template 23 can be accurately molded.

[0057] The present invention also provides a three-color three-station injection mold forming process, comprising the following steps:

[0058] S1 Mould design and manufacturing: Design and manufacture three-color three-station injection moulds according to product requirements;

[0059] S2 Material preparation: Select plastic materials and prepare plastic granules or powder according to the color and material requirements of the product;

[0060] S3 Injection molding machine debugging: adjust the parameters of the injection molding machine to ensure that the injection molding machine can work normally and meet the requirements of three-color three-station injection molding;

[0061] S4 mold installation and debugging: install the three-color three-station injection mold on the injection molding machine to ensure that the mold is installed correctly and can work well with the injection molding machine;

[0062] S5 Injection Molding: Add plastic material into the hopper of the injection molding machine, and inject the plastic material into the mold cavity through the heating and pressurization of the injection molding machine;

[0063] S6 Cooling and solidification: After the injection molding is completed, the injection molded product needs to be cooled to solidify it;

[0064] S7 Demolding and Removal: After the injection molded product is cooled and solidified, the mold needs to be opened and the injection molded product needs to be demolded and removed from the mold.

[0065] Working principle: The upper top plate 11 and the lower bottom plate 21 are respectively fixed on the injection molding machine with three injection systems, and then the fixed mold plate 13 and the movable mold plate 23 are molded together, and the first and second injection operations are performed in the molding chamber composed of the second mold cavity 25 and the first mold cavity 18 through the first nozzle 01 and the second nozzle 02 respectively, and two different colors are injected into the three stations respectively at the same time. The third injection work injects the third color plastic into the molding chamber of the first station through the third nozzle 03. After the operation is completed, the movable mold plate 23 and the fixed mold plate 13 are opened, and the demoulding mechanism 30 on the first station that completes the third injection molding works to eject the molded product, and then the product is ejected by the injection molding machine. The rotating disk drives the movable platen 23 to rotate, and the movable platen 23 rotates 120° with the second mold cavity 25. At this time, the demoulding mechanisms 30 on the two stations that have not performed the third shot do not perform the ejection action, and then the mold is closed again, and the third shot injection molding is performed on the molding cavity on the second station. After the injection molding is completed, the fixed platen 13 and the movable platen 23 are opened, and the product is ejected and demolded by the demoulding mechanism 30, and then the above operation is repeated to perform the third shot injection molding on the third station and demold the product. In one working cycle, three automobile taillight mask products can be obtained at the same time, which improves work efficiency, and does not need to set up multiple sub-molds and match multiple rotating stations, which can reduce the production and manufacturing cost of the mold;

[0066] The demolding mechanism 30 has three groups which are respectively arranged at the bottom of the three movable module chambers 24. When the demolding operation is performed, the oil cylinder 36 works to push the fixed connecting seat 35 to move. The movement of the fixed connecting seat 35 will drive the fixed base 32 and the movable seat 33 to move upward at the same time. The movement of the fixed base 32 will push the lifting push rod 31 to move upward. By setting up multiple lifting push rods 31 and arranging them in a matrix, the injection molded product can be subjected to all-round force, and the car taillight mask can be directly ejected and demolded.

[0067] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A three-color three-station injection mold, characterized in that: include: An upper mold (10), wherein the upper mold (10) is arranged on an injection molding machine; The upper mold (10) comprises an upper top plate (11), a flow divider plate (12) and a fixed mold plate (13); the upper top plate (11), the flow divider plate (12) and the fixed mold plate (13) are fixedly connected in sequence; both sides of the top of the upper top plate (11) and one side of the flow divider plate (12) are respectively provided with a first flow channel (14), a second flow channel (15) and a third flow channel (16); and inlet ports of the first flow channel (14), the second flow channel (15) and the third flow channel (16) respectively correspond to a first nozzle (01), a second nozzle (02) and a third nozzle (03) on an injection molding machine; The bottom end surface of the fixed mold plate (13) is provided with three fixed mold chambers (17) at equal intervals along the circumferential direction, and each of the fixed mold chambers (17) is correspondingly provided with a first mold cavity (18); The first flow channel (14) and the second flow channel (15) each have three branch flow channels, each of the branch flow channels corresponds to a first mold cavity (18) in each of the fixed module chambers (17), and the third flow channel (16) has one and corresponds to the first mold cavity (18) in one of the corresponding fixed module chambers (17); A lower mold (20), the lower mold (20) being used to cooperate with the upper mold (10) to produce the required three-color taillight mask under the injection molding of the injection molding machine, and the lower mold (20) being arranged on the movable mold rotating disk of the injection molding machine to drive the lower mold (20) to rotate; The lower mold (20) comprises a lower base plate (21), a support pad (22) and a movable mold plate (23); the movable mold plate (23) is fixedly arranged on a movable mold rotating disk of an injection molding machine; the lower base plate (21), the support pad (22) and the movable mold plate (23) are fixedly connected in sequence; three movable mold plate chambers (24) are provided at the top of the movable mold plate (23); a second mold cavity (25) is detachably arranged in each movable mold cavity (24) by means of bolts; the second mold cavity (25) is arranged correspondingly to the first mold cavity (18); Positioning guide grooves (26) are provided through the edges of both sides of the top of the second mold cavity (25); positioning guide blocks (27) are provided in the movable module chamber (24) to match the positioning guide grooves (26); side cores (28) are fixedly provided on both sides of the movable module chamber (24); and side chambers (29) are provided on the second mold cavity (25) to correspond to the side cores (28); A demoulding mechanism (30), the demoulding mechanism (30) being located in the lower mold (20) and being used to demould and separate the three-color taillight mask from the lower mold (20) after cooling and forming; The demoulding mechanism (30) comprises a plurality of lifting push rods (31), a fixed base (32) and a limited movable seat (33), wherein the bottom end of the lifting push rod (31) is fixedly connected to the fixed base (32), and the movable seat (33) is located on the top of the fixed base (32) and is slidably connected to the plurality of lifting push rods (31) respectively; Both sides of the fixed base (32) and the position-limiting movable base (33) are provided with U-shaped notches (34), and the inner sides of the two notches (34) are provided with fixed connection seats (35) for connecting the fixed base (32) and the position-limiting movable base (33). The bottom of the fixed connection seat (35) is provided with an oil cylinder (36), and the output end of the oil cylinder (36) is fixed to the fixed connection seat (35) through a locking block (37).

2. A three-color three-station injection mold according to claim 1, characterized in that: The lifting push rods (31) are distributed in a matrix, and the top ends of the lifting push rods (31) pass through the moving module chamber (24) and are placed in through holes (210) opened on the second mold cavity (25), and the top ends of the lifting push rods (31) are flush with the inner mold surface of the second mold cavity (25).

3. A three-color three-station injection mold according to claim 1, characterized in that: The oil cylinder (36) is fixedly arranged on the top end of the lower base plate (21), and the oil cylinder (36) is located outside the supporting cushion block (22).

4. The three-color three-station injection mold according to claim 1, characterized in that: A positioning cone block (19) is fixedly disposed in the middle of the bottom end of the fixed die plate (13), and a positioning groove (211) is provided at the top end of the movable die plate (23) corresponding to the positioning cone block (19).

5. The three-color three-station injection mold according to claim 1, characterized in that: A group of guide pillars (110) are respectively arranged on the bottom surface of the fixed mold plate (13) at one side of the fixed module chamber (17), each group of the guide pillars (110) are respectively distributed at equal intervals along the circumferential direction, and each group of the guide pillars (110) has two guide pillars, and slots (212) for accommodating the guide pillars (110) to be inserted are provided on the movable mold plate (23) corresponding to the guide pillars (110).

6. A three-color three-station injection mold molding process, applied to a three-color three-station injection mold according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1 Mould design and manufacturing: Design and manufacture three-color three-station injection moulds according to product requirements; S2 Material preparation: Select suitable plastic materials and prepare corresponding plastic granules or powders according to the color and material requirements of the product; S3 Injection molding machine debugging: adjust the injection molding machine to appropriate parameters to ensure that the injection molding machine can work normally and meet the requirements of three-color three-station injection molding; S4 mold installation and debugging: install the three-color three-station injection mold on the injection molding machine to ensure that the mold is installed correctly and can work well with the injection molding machine; S5 Injection Molding: Add plastic material into the hopper of the injection molding machine, and inject the plastic material into the mold cavity through the heating and pressurization of the injection molding machine; S6 Cooling and solidification: After the injection molding is completed, the injection molded product needs to be cooled to solidify it; S7 Demolding and Removal: After the injection molded product is cooled and solidified, the mold needs to be opened and the injection molded product needs to be demolded and removed from the mold.

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