High-gloss injection mold for thin-wall part

Abstract

The invention provides a highlight injection mold for a thin-wall part. The highlight injection mold comprises a movable mold module and a fixed mold module. The movable mold module and the fixed mold module are in sliding connection through a guide column, and cavities are formed in the opposite sides of the movable mold module and the fixed mold module respectively. A cooling system; the cooling system is composed of a plurality of cooling pipelines which are arranged close to the cavity. A glue injection system; the glue injection system injects melt into a mold cavity composed of the multiple mold cavities. An ejection system; and the ejection system ejects the product out of the cavity. A heating system; the heating system heats the cavity. The cooling pipeline is arranged close to the mold cavity, so that the temperature of the mold cavity can be quickly switched, and the surface smoothness of the thin-wall part can be ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molds, and in particular relates to a high-gloss injection mold for thin-walled parts. Background Art

[0002] Thin-walled injection molded parts generally refer to injection molded products with a wall thickness of less than 1mm, which are lightweight and low-cost. Due to the small wall thickness of thin-walled parts, the ratio of the condensation layer thickness to the thickness of the plastic part is large, the flow section closes early, and short shots are prone to occur, resulting in the inability to form lines in small parts or corners. To solve the short shot phenomenon, large gates are usually used to shorten the flow path and increase the runner cross-section. For thin-walled parts with larger areas, additional gates are required to shorten the flow path, but this setting is not conducive to the surface finish of thin-walled parts. In order to increase the runner cross-section, the mold is closed in steps. This method requires precise control of the injected melt volume and is prone to flash.

[0003] Therefore, the above problems need to be solved urgently. Summary of the Invention

[0004] Purpose of the invention: In order to overcome the above shortcomings, the present invention provides a high-gloss injection mold for thin-walled parts, which accurately controls the mold temperature, exhausts thoroughly, avoids short shots, and ensures the surface smoothness of thin-walled parts.

[0005] Technical solution: In order to achieve the above-mentioned purpose, the present invention provides a high-gloss injection mold for thin-walled parts, including a movable mold module and a fixed mold module. The movable mold module and the fixed mold module are slidably connected by guide columns, and cavities are respectively provided on opposite sides of the movable mold module and the fixed mold module. Cooling system; the cooling system is composed of a plurality of cooling pipes, and a plurality of cooling pipes are arranged adjacent to the cavity. Glue injection system; the glue injection system injects molten material into the mold cavity composed of a plurality of cavities. Ejection system; the ejection system ejects the product out of the cavity. Heating system; the heating system heats the cavity. The present invention is used for injection molding of thin-walled parts, and the cooling pipe is arranged adjacent to the cavity to ensure rapid switching of the cavity temperature and ensure the surface smoothness of the thin-walled parts.

[0006] Furthermore, in the above-mentioned high-gloss injection mold for thin-walled parts, the heating system includes an air inlet provided on the fixed mold module and an air outlet provided on the movable mold module. The air inlet is connected to the flow channel provided in the injection system. A spiral exhaust mechanism is provided at the air outlet, and the spiral exhaust mechanism discharges the gas in the cavity from the movable mold module. The air inlet is connected to the high-temperature steam pipe, and the high-temperature steam is input into the cavity through the air inlet and the flow channel provided in the injection system, thereby increasing the temperature in the cavity and reducing the melt condensation layer. At the same time, the spiral exhaust mechanism forcibly discharges the gas in the cavity, forming a vacuum negative pressure, so that the melt is filled faster, and avoids trapped air causing incomplete filling and surface defects.

[0007] Furthermore, in the above-mentioned high-gloss injection mold for thin-walled parts, the spiral exhaust mechanism includes a first screw and a second screw, the first screw is arranged on the lower side of the air outlet, and the first screw and the air outlet are arranged tangentially. The first screw rotates to intermittently close the air outlet. The second screw is meshed with the first screw. The second screw is connected to an exhaust channel at one end away from the air outlet. One end of the first screw extends out of the movable mold module, and the end of the first screw extending out of the movable mold module is connected to the drive motor. The drive motor is set as a servo motor. The drive motor drives the first screw to rotate, and the air outlet is intermittently opened and closed. When the air outlet is open, the first screws mesh with each other to suck the gas out of the cavity, thereby improving the exhaust effect. When the air outlet is closed, the cavity forms a closed mold cavity, ensuring that no leakage occurs during the pressure holding stage and achieving dynamic sealing.

[0008] Furthermore, in the aforementioned high-gloss injection mold for thin-walled parts, the movable mold module includes a movable mold core, and the fixed mold module includes a fixed mold core. The movable mold core and the fixed mold core are arranged relative to each other. A center mold plate is disposed between the movable mold core and the fixed mold core, connected to the movable mold module. The center mold plate extends between the movable mold core and the fixed mold core. The center mold plate has a molding portion at one end extending into the mold cavity, and a groove is disposed on the side of the center mold plate away from the molding portion. An ejection system is connected to the groove opening and includes a fixed plate, with both ends of the fixed plate connected to either side of the groove. The fixed plate is connected to a drive mechanism on the side away from the center mold plate. A push plate and a guide rod are disposed on the side away from the drive mechanism. The guide rods are connected to the fixed plate and the bottom of the groove at both ends. The push plate is slidably connected to the guide rod, and the drive mechanism extends through the fixed plate and drives the push plate. The push plate is connected to a push rod, which slidably connects to a through-groove provided in the center mold plate. The end of the push rod away from the push plate and the molding portion form a side wall of the mold cavity. The drive mechanism is configured as a linear drive unit, preferably a linear servo cylinder. The movable mold core, fixed mold core and middle mold plate together constitute the forming cavity, and the push rod is integrated into the middle mold plate. The structure is compact. The push rod acts on the inner wall of the thin-walled part to achieve side demoulding, avoiding damage to the outer wall of the thin-walled part by traditional ejectors, avoiding deformation of the thin-walled part, and improving the surface finish and quality of the thin-walled part.

[0009] Furthermore, in the aforementioned high-gloss injection mold for thin-walled parts, the top surface of the center mold plate is equipped with limit switches, one located near the bottom of the groove and the other near the groove opening. A limit block is installed on the side of the push plate near the limit switches, which triggers the limit switches. The two limit switches control the travel of the push rod. When the push rod extends to eject the thin-walled part, the limit block triggers the limit switch near the cavity, stopping the push rod. When the push rod retracts, the limit block triggers the limit switch away from the cavity, ensuring zero reliability of the ejection system.

[0010] Furthermore, in the aforementioned high-gloss injection mold for thin-walled parts, an insert system is provided on the movable mold module near the fixed mold module. An inclined guide post system is provided on the side of the fixed mold module near the movable mold module, which drives the insert system toward or away from the mold cavity. The inclined guide post system includes inclined guide posts and a shovel base, which are conventional arrangements.

[0011] Furthermore, in the aforementioned high-gloss injection mold for thin-walled parts, the insert system includes a slider, which is slidably connected to the movable mold module via a slide seat. The slider is slidably arranged in a direction away from or close to the mold cavity. The slider is provided with an inclined guide hole. The side of the slider that abuts the movable mold module is connected to a sliding shaft. The movable mold module is provided with a slide groove, which is arranged along the sliding direction of the slider, and the sliding shaft extends into the slide groove. A countersunk hole is provided on the side of the movable mold core near the slide groove. A sliding spring is connected to the countersunk hole. The end of the sliding spring away from the movable mold core abuts the sliding shaft, and the sliding shaft preloads the sliding spring. When the mold is closed, the sliding spring presses against the sliding shaft to ensure that the slider can fit tightly against the shovel base in the closed state, avoiding gaps caused by the slider not moving into place and reducing flash.

[0012] Furthermore, in the above-mentioned high-gloss injection mold for thin-walled parts, the movable mold module is provided with a slide groove, and a slide member is connected in the slide groove, and the slide member is made of elastic material. The slide member is provided with a slide hole and a guide groove on the side close to the movable mold core, and the guide groove is provided close to the movable mold core, and the slide hole and the guide groove are connected. A slide pin is connected to the side of the movable mold module where the slider abuts, and the slide pin extends into the slide groove. When the mold is separated, the slide pin is inserted into the slide hole through the guide groove. The slide pin is inserted into the slide hole to position the slider, to prevent the slider from moving after the inclined guide post is disengaged, and to ensure that the inclined guide post is smoothly inserted into the inclined guide hole when the mold is closed.

[0013] Furthermore, in the aforementioned high-gloss injection mold for thin-walled parts, the injection system includes a heat shield connected to the side of the fixed mold module facing away from the movable mold module. A panel is connected to the side of the heat shield facing away from the fixed mold module. A heat shield groove is provided in the center of the heat shield, within which a runner plate is located. The runner plate is provided with a main flow channel. A positioning ring is connected to the side of the panel facing away from the heat shield. The positioning ring is connected to the runner plate via a nozzle. A runner sleeve is connected to the fixed mold module. The main flow channel is connected to the mold cavity via the runner sleeve. The positioning ring, nozzle, runner plate, and runner sleeve are connected to form the injection flow channel. The nozzle and runner plate are each equipped with an electric heating system. The air inlet and main flow channel are connected via a one-way valve. The electric heating system is configured as an electric heating pipe with a motor heat pipe installed in the runner to prevent melt cooling and ensure melt fluidity. The air inlet and main flow channel are connected, allowing high-temperature steam to be injected into the mold cavity via the main flow channel, simplifying the layout of the mold heating piping. A one-way valve is also provided to prevent melt from entering the air inlet.

[0014] Furthermore, in the aforementioned high-gloss injection mold for thin-walled parts, the cooling circuit includes primary and secondary cooling circuits. The primary cooling circuits are arranged in a grid pattern through the movable and fixed mold modules. The secondary cooling circuits extend through the slider and center mold plate, forming a loop. The secondary cooling circuits extend through the center mold plate, achieving all-around cooling of the thin-walled parts, increasing cooling speed and boosting production efficiency.

[0015] It can be seen from the above technical solution that the present invention has the following beneficial effects: the present invention is used for high-gloss injection molds for thin-walled parts, and the cooling pipeline is arranged near the cavity to ensure rapid switching of the cavity temperature and ensure the surface finish of the thin-walled parts. The cavity temperature is quickly increased by injecting the flow channel provided in the injection system through the air inlet, reducing the melt condensation layer. At the same time, the spiral exhaust mechanism forcibly discharges the gas in the cavity to form a vacuum negative pressure, so that the melt can be filled faster, avoiding trapped air resulting in insufficient filling and surface defects. The movable mold core, the fixed mold core and the middle template together constitute the molding cavity, and the push rod is integrated into the middle template, which has a compact structure. The push rod acts on the inner wall of the thin-walled part to achieve side demolding, avoiding damage to the outer wall of the thin-walled part by traditional ejectors, avoiding deformation of the thin-walled part, and improving the surface finish and quality of the thin-walled part. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a cross-sectional view of a high-gloss injection mold for thin-walled parts according to the present invention; Figure 2 is a structural schematic diagram of the spiral exhaust mechanism; Figure 3 It is a structural schematic diagram of the movable mold core provided in the movable mold module; Figure 4 Schematic diagram of the structure of the ejection system; Figure 5 A top view of the movable mold module; Figure 6 A partial enlarged view of the movable mold module having a slide groove; Figure 7 for Figure 1 A partial enlarged view of .

[0017] In the figure: 1. Moving mold module, 11. Cavity, 12. Moving mold core, 13. Slide groove, 14. Sliding groove, 15. Sliding piece, 151. Sliding hole, 152. Guide groove, 2. Fixed mold module, 21. Fixed mold core, 3. Cooling system, 31. Cooling pipeline, 311. Auxiliary cooling pipeline, 4. Injection system, 41. Heat insulation board, 411. Heat insulation groove, 42. Panel, 421. Positioning ring, 43. Runner plate, 431. Main runner, 44. Nozzle, 45. Runner sleeve, 5. Ejector System, 51. Fixed plate, 52. Driving mechanism, 53. Push plate, 531. Limit block, 54. Guide rod, 55. Push rod, 6. Heating system, 61. Air inlet, 62. Air outlet, 63. Spiral exhaust mechanism, 631. First screw, 632. Second screw 7. Middle template, 71. Forming part, 72. Groove, 73. Limit switch, 8. Insert system, 81. Slider, 811. Oblique guide hole, 812. Sliding shaft, 813. Sliding spring, 814. Sliding pin. DETAILED DESCRIPTION

[0018] Example 1 like Figure 1 The illustrated embodiment of a high-gloss injection mold for thin-walled parts includes a movable mold module 1 and a fixed mold module 2. The movable mold module 1 and the fixed mold module 2 are slidably connected by guide pillars, and mold cavities 11 are provided on opposite sides of the movable mold module 1 and the fixed mold module 2. A cooling system 3 is provided; the cooling system 3 is composed of a plurality of cooling lines 31, and the plurality of cooling lines 31 are arranged adjacent to the mold cavities 11. A glue injection system 4 is provided; the glue injection system 4 injects molten material into the mold cavity composed of the plurality of mold cavities 11. An ejection system 5 is provided; the ejection system ejects the product from the mold cavity 11. A heating system 6 is provided; the heating system 6 heats the mold cavity 11.

[0019] like Figure 1-3 In the illustrated mold for high-gloss injection molding of thin-walled parts, heating system 6 includes an air inlet 61 provided on fixed mold module 2 and an air outlet 62 provided on movable mold module 1. Air inlet 61 communicates with a flow channel provided in injection system 4. Air outlet 62 is provided with a spiral exhaust mechanism 63, which exhausts air within cavity 11 through movable mold module 1.

[0020] In this embodiment, the spiral exhaust mechanism 63 includes a first screw 631 and a second screw 632. The first screw 631 is arranged on the lower side of the air outlet 62, and the first screw 631 and the air outlet 62 are arranged tangentially. The first screw 631 rotates to intermittently close the air outlet 62. The second screw 632 and the first screw 631 are meshed. The end of the second screw 632 away from the air outlet 62 is connected to the exhaust channel. One end of the first screw 631 extends out of the movable mold module 1, and the end of the first screw 631 extending out of the movable mold module 1 is connected to the drive motor. The drive motor is configured as a servo motor.

[0021] like Figure 1 、4 The illustrated mold for high-gloss injection molding of thin-walled parts comprises a movable mold module 1 including a movable mold core 12, and a fixed mold module 2 including a fixed mold core 21. The movable mold core 12 and the fixed mold core 21 are arranged relative to each other. A center mold plate 7 is provided between the movable mold core 12 and the fixed mold core 21. The center mold plate 7 is connected to the movable mold module 1 and extends between the movable mold core 12 and the fixed mold core 21. A molding portion 71 is provided at one end of the center mold plate 7 extending into the mold cavity 11, and a groove 72 is provided on the side of the center mold plate 7 away from the molding portion 71. An ejection system 5 is connected to the opening of the groove 72. The ejection system 5 comprises a fixed plate 51, the ends of which are respectively connected to the two sides of the groove 72. A driving mechanism 52 is connected to the side of the fixed plate 51 away from the center mold plate 7. A push plate 53 and a guide rod 54 are provided on the side of the fixed plate 51 away from the driving mechanism 52. The ends of the guide rod 54 are respectively connected to the fixed plate 51 and the bottom of the groove 72. Push plate 53 is slidably connected to guide rod 54. Drive mechanism 52 extends through fixed plate 51 and is drivably connected to push plate 53. Push plate 53 is connected to push rod 55, which is slidably connected to a through-slot provided in center mold plate 7. The end of push rod 55, away from push plate 53, forms the mold cavity sidewall with forming portion 71. Drive mechanism 52 is a linear drive unit, preferably a linear servo cylinder.

[0022] In this embodiment, limit switches 73 are provided on the top surface of the center mold plate 7. Two limit switches 73 are located near the bottom and opening of the groove 72, respectively. A limit block 531 is provided on the side of the push plate 53 near the limit switch 73. This limit block 531 triggers the limit switch 73. The two limit switches 73 control the travel of the push rod 55. When the push rod 55 extends to eject the thin-walled part, the limit block 531 triggers the limit switch 73 near the cavity 11, causing the push rod 55 to stop moving. When the push rod 55 retracts, the limit block 531 triggers the limit switch 73 away from the cavity 11, ensuring the reliability of the ejection system 50.

[0023] like Figure 5 The illustrated mold for high-gloss injection molding of thin-walled parts features an insert system 8 installed near the fixed mold module 2 on the movable mold module 1. A tilted guide post system is installed on the side of the fixed mold module 2 near the movable mold module 1. This system drives the insert system 8 toward or away from the mold cavity 11. The tilted guide post system includes a conventional arrangement of guide posts and a shovel base.

[0024] like Figure 5-6The illustrated mold for high-gloss injection molding of thin-walled parts has an insert system 8 including a slider 81, which is slidably connected to the movable mold module 1 via a slide seat. The slider 81 is slidably arranged in a direction away from or toward the mold cavity 11. The slider 81 is provided with an inclined guide hole 811. The side of the slider 81 that abuts the movable mold module 1 is connected to a sliding shaft 812. The movable mold module 1 is provided with a slide groove 13, which is arranged along the sliding direction of the slider 81. The slide shaft 812 extends into the slide groove 13. The movable mold core 12 is provided with a countersunk hole near the slide groove 13. A sliding spring 813 is connected to the countersunk hole. The end of the sliding spring 813 away from the movable mold core 12 abuts the sliding shaft 812, and the sliding shaft 812 preloads the sliding spring 813.

[0025] In this embodiment, the movable mold module 1 is provided with a slide groove 14, and a slide member 15 is connected to the slide groove 14. The slide member 15 is made of elastic material. The slide member 15 is provided with a slide hole 151 and a guide groove 152 on the side close to the movable mold core 12. The guide groove 152 is provided close to the movable mold core 12, and the slide hole 151 and the guide groove 152 are connected. The slider 81 is connected to the side of the movable mold module 1 with a slide pin 814, and the slide pin 814 extends into the slide groove 14. When the mold is separated, the slide pin 814 is inserted into the slide hole 151 through the guide groove 152. The slide pin 814 is inserted into the slide hole 151 to realize the positioning of the slider 81, and prevents the slider 81 from moving after the inclined guide column is disengaged, and ensures that the inclined guide column is smoothly inserted into the inclined guide hole 811 when the mold is closed.

[0026] like Figure 7 The illustrated mold for high-gloss injection molding of thin-walled parts has a glue injection system 4 including a heat shield 41 connected to the side of the fixed mold module 2 facing away from the movable mold module 1. A panel 42 is connected to the side of the heat shield 41 facing away from the fixed mold module 2. A heat shield groove 411 is located in the center of the heat shield 41. A runner plate 43 is located within the heat shield groove 411, and the runner plate 43 has a main flow channel 431. A positioning ring 421 is connected to the side of the panel 42 facing away from the heat shield 41. The positioning ring 421 is connected to the runner plate 43 via a nozzle 44. A runner sleeve 45 is connected to the fixed mold module 2. The main flow channel 431 is connected to the mold cavity 11 via the nozzle 44. The positioning ring 421, nozzle 44, runner plate 43, and runner sleeve 45 are connected to form a glue injection channel. The nozzle 44 and runner plate 43 are each equipped with an electric heating system. An air inlet 61 and the main flow channel 431 are connected via a one-way valve. The electric heating system uses electric heating pipes, with motor heat pipes installed in the flow channel to prevent melt cooling and ensure melt fluidity. The air inlet 61 is connected to the main flow channel 431, which is used to inject high-temperature steam into the mold cavity 11, simplifying the layout of the mold heating pipeline. A one-way valve is also provided to prevent the melt from entering the air inlet 61.

[0027] like Figure 4-5The cooling circuit 31 shown in the high-gloss injection mold for thin-walled parts includes a main cooling circuit and an auxiliary cooling circuit 311. The main cooling circuit is arranged in a grid pattern through the movable mold module 1 and the fixed mold module 2. The auxiliary cooling circuit 311 passes through the slider 81 and the middle mold plate 7 to form a loop.

[0028] The present invention is used for injection molding thin-walled parts. During the injection molding process, the mold is heated via several cooling pipes 31 provided in the cooling system 3. The mold is closed, and the movable mold core 12 and the fixed mold core 21 abut. The movable mold core 12, the fixed mold core 21, the slider 81, and the molding portion 71 together form a mold cavity, within which the thin-walled part is injection molded. The drive mechanism 52 drives the push plate 53, which pushes the push rod 55 back. When the limit block 531 moves away from the limit switch 73 on the side near the cavity 11, the drive mechanism 52 stops. The inclined guide column drives the slider 81 toward the cavity 11. The shovel base abuts the slider 81 to prevent it from retracting. The sliding spring 813 presses the sliding shaft 812, causing the slider to press against the shovel base. High-temperature steam is injected through the air inlet 61 and into the cavity 11 through the flow channel provided in the injection system 4, raising the temperature within the cavity 11. Then, molten material injection begins, the high-temperature steam input is shut off, and the motor drives the first screw 631 to rotate. The molten material enters the mold cavity 11 through the positioning ring 421, the nozzle 44, the runner plate 43 and the runner sleeve 45. At the same time, the spiral exhaust mechanism 63 forcibly exhausts the gas in the mold cavity 11, guiding the injection of the molten material, so that the melt fills faster and avoids air entrapment leading to incomplete filling and surface defects. When part of the molten material enters the air outlet 62, the drive motor drives the first screw 631 to be fixed in the set position. When the external thread provided on the first screw 631 closes the air outlet 62, the mold cavity 11 forms a closed mold cavity and is cooled under pressure. The cooling system 3 removes the heat from the molten material, allowing the thin-walled part to cool. After cooling, the first screw 631 continues to rotate to discharge the residual material. The mold is separated, and the inclined guide column drives the slider 81 to retract, and the positioning pin 814 is locked in the positioning hole 151. The drive mechanism 52 drives the push rod 55, and the push rod 55 extends to push the thin-walled part out. When the limit block 531 triggers the limit switch 73 on the side close to the mold cavity 11, the drive mechanism 52 stops.

[0029] The above embodiments are illustrative and are intended to illustrate the technical concepts and features of the present invention so that those skilled in the art can understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made based on the spirit of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A high-gloss injection mold for thin-walled parts, characterized by: It comprises a movable mold module (1) and a fixed mold module (2); the movable mold module (1) and the fixed mold module (2) are slidably connected via guide pillars, and mold cavities (11) are respectively provided on opposite sides of the movable mold module (1) and the fixed mold module (2); A cooling system (3); the cooling system (3) is composed of a plurality of cooling pipes (31), and the plurality of cooling pipes (31) are arranged adjacent to the mold cavity (11); A glue injection system (4); the glue injection system (4) injects molten material into a mold cavity composed of a plurality of mold cavities (11); An ejection system (5); the ejection system ejects the product from the mold cavity (11); A heating system (6); the heating system (6) heats the mold cavity (11).

2. The high-gloss injection mold for thin-walled parts according to claim 1, characterized in that: The heating system (6) comprises an air inlet (61) provided on the fixed mold module (2) and an air outlet (62) provided on the movable mold module (1); the air inlet (61) is connected to a flow channel provided on the injection system (4); a spiral exhaust mechanism (63) is provided at the air outlet (62), and the spiral exhaust mechanism (63) discharges the gas in the mold cavity (11) from the movable mold module (1).

3. The high-gloss injection mold for thin-walled parts according to claim 2, characterized in that: The spiral exhaust mechanism (63) includes a first screw (631) and a second screw (632), wherein the first screw (631) is arranged at the lower side of the air outlet (62), and the first screw (631) and the air outlet (62) are arranged tangentially; the first screw (631) rotates to intermittently close the air outlet (62); the second screw (632) and the first screw (631) are meshed; the end of the second screw (632) away from the air outlet (62) is connected to the exhaust channel; one end of the first screw (631) extends out of the movable mold module (1), and the first screw (631) is connected to the driving motor.

4. The high-gloss injection mold for thin-walled parts according to claim 1, characterized in that: The movable mold module (1) includes a movable mold core (12), and the fixed mold module (2) includes a fixed mold core (21); the movable mold core (12) and the fixed mold core (21) are arranged relative to each other; a middle mold plate (7) is provided between the movable mold core (12) and the fixed mold core (21), and the middle mold plate (7) is connected to the movable mold module (1), and the middle mold plate (7) extends into the space between the movable mold core (12) and the fixed mold core (21), and a molding portion (71) is provided at one end of the middle mold plate (7) extending into the mold cavity (11), and a groove (72) is provided on the side of the middle mold plate (7) away from the molding portion (71); the ejection system (5) is connected to the opening of the groove (72), and the ejection system (5) includes a fixed plate (51), and the fixed plate (51) has two ends. The ends are respectively connected to both sides of the groove (72); the fixed plate (51) is connected to the driving mechanism (52) on the side away from the middle template (7); the fixed plate (51) is provided with a push plate (53) and a guide rod (54) on the side away from the driving mechanism (52); the two ends of the guide rod (54) are respectively connected to the fixed plate (51) and the bottom of the groove (72); the push plate (53) is slidably connected to the guide rod (54); the driving mechanism (52) passes through the fixed plate (51) and the push plate (53) for driving connection; the push plate (53) is connected to a push rod (55), the push rod (55) is slidably connected to the through groove provided in the middle template (7); the push rod (55) and the molding portion (71) form a mold cavity side wall.

5. The high-gloss injection mold for thin-walled parts according to claim 4, characterized in that: A limit switch (73) is provided on the top surface of the middle template (7), and two limit switches (73) are respectively provided near the bottom of the groove (72) and near the opening of the groove (72); a limit block (531) is provided on one side of the push plate (53) near the limit switch (73), and the limit block (531) triggers the limit switch (73).

6. The high-gloss injection mold for thin-walled parts according to claim 5, characterized in that: The movable mold module (1) is provided with an insert system (8) close to the fixed mold module (2); the fixed mold module (2) is provided with an inclined guide column system on one side close to the movable mold module (1), and the inclined guide column system drives the insert system (8) to approach or move away from the cavity (11).

7. The high-gloss injection mold for thin-walled parts according to claim 6, characterized in that: The insert system (8) includes a slider (81), the slider (81) is slidably connected to the movable mold module (1) through a slide seat, the slider (81) is slidably arranged in a direction away from or close to the cavity (11), the slider (81) is provided with an inclined guide hole (811), the slider (81) is connected to a sliding shaft (812) on the side abutting the movable mold module (1), the movable mold module (1) is provided with a slide groove (13), the slide groove (13) is arranged along the sliding direction of the slider (81), and the slide shaft (812) extends into the slide groove (13); the movable mold core (12) is provided with a countersunk hole on the side close to the slide groove (13), a slide spring (813) is connected in the above countersunk hole, the slide spring (813) is abutted against the slide shaft (812) at one end away from the movable mold core (12), and the slide shaft (812) pre-presses the slide spring (813).

8. The high-gloss injection mold for thin-walled parts according to claim 7, characterized in that: The movable mold module (1) is provided with a positioning groove (14), a positioning member (15) is connected in the positioning groove (14), and the material of the positioning member (15) is set as an elastic material; the positioning member (15) is provided with a positioning hole (151) and a guide groove (152) on the side close to the movable mold core (12), the guide groove (152) is set close to the movable mold core (12), and the positioning hole (151) and the guide groove (152) are connected; the slider (81) is connected to the side of the movable mold module (1) with a positioning pin (814), and the positioning pin (814) extends into the positioning groove (14); when the mold is separated, the positioning pin (814) is clamped into the positioning hole (151) through the guide groove (152).

9. The high-gloss injection mold for thin-walled parts according to claim 2, characterized in that: The injection system (4) includes a heat insulation plate (41), the heat insulation plate (41) is connected to the side of the fixed mold module (2) away from the movable mold module (1), and the side of the heat insulation plate (41) away from the fixed mold module (2) is connected to a panel (42); a heat insulation groove (411) is provided in the middle of the heat insulation plate (41), a flow channel plate (43) is provided in the heat insulation groove (411), and the flow channel plate (43) is provided with a main flow channel (431); the side of the panel (42) away from the heat insulation plate (41) is connected to a positioning ring (421) The positioning ring (421) is connected to the flow channel plate (43) through the nozzle (44), the fixed mold module (2) is connected to the flow channel sleeve (45), the main flow channel (431) is connected to the mold cavity (11) through the flow channel sleeve (45), and the positioning ring (421), the nozzle (44), the flow channel plate (43) and the flow channel sleeve (45) are connected to form a glue injection flow channel; the nozzle (44) and the flow channel plate (43) are respectively provided with an electric heating system; the air inlet (61) and the main flow channel (431) are connected through a one-way valve.

10. The high-gloss injection mold for thin-walled parts according to claim 8, characterized in that: The cooling pipeline (31) comprises a main cooling pipeline and an auxiliary cooling pipeline (311), wherein the main cooling pipeline is arranged in a grid pattern through the movable mold module (1) and the fixed mold module (2); and the auxiliary cooling pipeline (311) respectively penetrates the slider (81) and the middle mold plate (7) to form a loop.

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