Light guide plate forming die

Abstract

The invention relates to the field of molds, in particular to a light guide plate forming mold which comprises a fixed mold body and a movable mold body, the fixed mold body comprises a fixed mold base, and at least one fixed mold core is arranged on the side, facing the movable mold body, of the fixed mold base; the movable mold comprises a movable mold base, a mold frame mechanism is arranged on the movable mold base, and at least one forming groove is formed in the mold frame mechanism; when the mold is in a mold closing state, the fixed mold core and the forming groove are enclosed to form a cavity; cooling pipe mechanisms are arranged in the fixed mold base, the fixed mold core, the movable mold base and the mold frame mechanism; a pouring gate mechanism is arranged on the fixed mold and is communicated with the mold cavity; and an ejection mechanism for ejecting the water gap is arranged on the movable mold base. The forming efficiency of the light guide plate is improved, and the forming quality is ensured.

Description

Technical Field

[0001] The present application relates to the field of molds, and in particular to a light guide plate forming mold. Background Art

[0002] In the field of light guide plate manufacturing, mold forming technology is the key link in producing high-quality light guide plates. As an important component in liquid crystal display devices, the molding quality of light guide plates directly affects the optical performance and overall quality of the product. Therefore, how to optimize the mold forming process and improve production efficiency and product quality has always been the focus of research in this field.

[0003] The related art discloses a light guide plate forming mold device, which includes a mold base, at least one mold core, at least one guide groove and at least one pipeline assembly, wherein the mold base has a first side surface and a second side surface opposite to each other; the at least one mold core is arranged between the first side surface and the second side surface of the mold base, wherein the at least one mold core has a third side surface and a bottom surface, the third side surface is parallel to the first side surface, and the bottom surface is perpendicular to the third side surface; the at least one guide groove is arranged on one of the bottom surface of the at least one mold core and the contact surface embedded in the mold base and contacting the bottom surface; and the at least one pipeline assembly passes through the mold base from the second side surface of the mold base to the at least one mold core, and extends vertically along the third side surface of the at least one mold core to the at least one guide groove to form at least one loop.

[0004] The design of the light guide plate molding mold in the related art mainly relies on a long molding cycle to ensure the stability of the mold temperature and the molding quality of the product. However, this design has obvious limitations. In particular, when the mold molding cycle is shortened to less than 40 seconds, the mold is still in a relatively hot state, which makes the heat conduction plate easily deformed. Summary of the invention

[0005] In order to overcome the limitation of the light guide plate forming mold in the prior art that the light guide plate is easily deformed when the forming cycle is shortened, improve production efficiency and ensure product quality, the present application provides a light guide plate forming mold.

[0006] The present application provides a light guide plate forming mold adopting the following technical solution: A light guide plate molding mold comprises a fixed mold and a movable mold, wherein the fixed mold comprises a fixed mold seat, and at least one fixed mold core is arranged on the side of the fixed mold seat facing the movable mold; the movable mold comprises a movable mold seat, and a mold frame mechanism is arranged on the movable mold seat, and at least one molding groove is formed inside the mold frame mechanism; when the mold is in a mold closing state, the fixed mold core and the molding groove are combined to form a mold cavity; cooling pipe mechanisms are arranged inside the fixed mold seat, inside the fixed mold core, inside the movable mold seat and inside the mold frame mechanism; a gate mechanism is arranged on the fixed mold, and the gate mechanism is connected to the mold cavity; an ejection mechanism for ejecting a water outlet is arranged on the movable mold seat.

[0007] By adopting the above technical solution, the fixed mold core and the molding groove in the mold frame mechanism are precisely docked to form a cavity when the mold is closed, realizing efficient molding of the light guide plate. The cooling pipe mechanism widely laid inside the mold accelerates the cooling process, shortening the molding cycle from the traditional long 35 seconds to 30 seconds, greatly improving production efficiency and capacity. At the same time, it also ensures the stability of the mold temperature and effectively avoids the deformation of the light guide plate due to overheating of the mold. In addition, the wire drawing phenomenon in the nozzle molding process is particularly reduced, which facilitates the smooth ejection of the nozzle and further improves the product quality.

[0008] Optionally, the mold frame mechanism includes a flow channel plate and a mold frame assembly, the flow channel plate and the mold frame assembly are both fixed on the movable mold base, the mold frame assembly is rectangular, the sprue machine is located inside the mold frame assembly, and the two ends of the flow channel plate are respectively fixedly connected to the inner side walls of the mold frame assembly on both sides that are parallel to each other; the flow channel plate divides the mold frame mechanism into two cavities, each of the cavities is provided with a movable mold core, the outer side wall of the movable mold core abuts against the inner side wall of the cavity, the movable mold core, the flow channel plate A molding groove is formed between the side wall of the plate and the mold frame assembly, and the depth of the molding groove is the depth of the mold frame assembly above the movable mold core; a sprue groove is provided on the surface of the flow channel plate, and both ends of the sprue groove are open and respectively connected to the two molding grooves; a plurality of through holes for the ejection mechanism to pass through are provided on the flow channel plate, and the ejection mechanism passes through the through holes and slides with the flow channel plate; the mold frame assembly includes a plurality of fixedly connected mounting seats, and each of the mounting seats includes a beryllium copper insert.

[0009] By adopting the above technical solution, the runner plate not only serves as a guiding channel for the water flow, but also divides the mold frame mechanism into two independent molding spaces. The movable mold core is precisely embedded in each space, and together with the side wall of the runner plate and the mold frame assembly, a molding groove is defined to ensure the accuracy and consistency of the light guide plate molding. The mold frame assembly is fixedly connected by multiple mounting seats containing beryllium copper inserts, which not only ensures the stability of the structure, but also optimizes the cooling effect by utilizing the high thermal conductivity of beryllium copper. The sprue groove opened on the runner plate realizes the balanced distribution of the injection molding material and effectively avoids the wire drawing phenomenon. At the same time, the through hole opened on its surface and the sliding matching design of the ejection mechanism enable the sprue to be easily ejected, thereby improving production efficiency.

[0010] Optionally, the fixed mold seat includes a panel and an A plate that are fixedly connected, the A plate is provided with a first groove, the outer wall of the fixed mold core abuts against the inner wall of the first groove, and the fixed mold core is fixedly connected to the A plate; the cooling pipe mechanism includes a first cooling circuit and a second cooling circuit, the first cooling circuit is used to cool the panel, and the second cooling circuit is used to cool the A plate and the fixed mold core at the same time.

[0011] By adopting the above technical solution, the first groove opened on the A plate accurately accommodates and fixes the fixed mold core, ensuring the stability of the mold structure and the accuracy of molding. The cooling pipe mechanism is divided into the first cooling circuit and the second cooling circuit, which cool the panel, A plate and the fixed mold core respectively. This partitioned cooling not only improves the cooling efficiency and makes the mold temperature more uniform and stable, but also effectively shortens the molding cycle, further improving production efficiency and product quality.

[0012] Optionally, the first cooling circuit includes a plurality of cooling tubes (first cooling tubes), and the plurality of cooling tubes (first cooling tubes) are all arranged inside the panel, and both ends of each of the cooling tubes (first cooling tubes) extend out of the panel.

[0013] By adopting the above technical solution, the first cooling circuit includes a plurality of precisely laid out cooling tubes, which are embedded in the panel, and both ends of the cooling tubes extend out of the panel to facilitate connection to the cooling system. It not only ensures the effective cooling of the panel and improves the overall temperature stability of the mold, but also enhances the uniformity and efficiency of cooling through evenly distributed cooling tubes. Combined with the mold frame mechanism and the fixed mold seat, as well as the precise cooling of the A plate and the fixed mold core by the second cooling circuit, the entire mold system achieves efficient and stable cooling performance, providing a solid foundation for the high-quality and efficient production of light guide plates.

[0014] Optionally, the second cooling circuit includes multiple first cooling channels, each of the first cooling channels includes a first connecting pipe, two first vertical pipes and two first transverse pipes, the first transverse pipes correspond to the first vertical pipes one by one; the first connecting pipe is arranged inside the fixed mold core, the two first transverse pipes are respectively located on two opposite sides of the A plate, the two first transverse pipes are coaxial, one end of each of the first transverse pipes is passed through the inside of the top plate, and the other end of each of the first transverse pipes extends out of the side wall of the top plate; the first vertical pipe passes through the A plate and the fixed mold core at the same time, one end of the first vertical pipe is communicated with one end of the first transverse pipe passing through the inside of the top plate, and the other end of the first vertical pipe is communicated with the end of the first connecting pipe.

[0015] By adopting the above technical solution, the second cooling circuit includes multiple first cooling channels, and each first cooling tube is precisely connected by a first connecting tube, two first vertical tubes and two first horizontal tubes, forming an efficient cooling circulation system. The first connecting tube is arranged inside the fixed mold core, and the first vertical tube runs through the A plate and the fixed mold core at the same time, and is precisely connected with the first horizontal tube on both sides of the A plate, ensuring that the cooling medium can flow smoothly and evenly through the entire cooling circuit. Not only does it significantly improve the cooling efficiency of the fixed mold core and the A plate, making the mold temperature more stable, but it also further enhances the uniformity and efficiency of cooling by optimizing the flow path of the cooling medium.

[0016] Optionally, the movable mold base includes a base plate and a B plate that are fixedly connected, and the movable mold core is fixedly connected to the B plate; the cooling pipe mechanism includes a third cooling circuit and a fourth cooling circuit, the third cooling circuit is used to cool the base plate, and the fourth cooling circuit is used to simultaneously cool the B plate and the movable mold core.

[0017] By adopting the above technical solution, the movable mold base is a fixed connection structure between the bottom plate and the B plate, and the movable mold core is precisely fixed on the B plate, ensuring the stability of the mold structure and the accurate positioning of the movable mold core. At the same time, the third cooling circuit and the fourth cooling circuit in the cooling pipe mechanism cool the bottom plate, the B plate and the movable mold core respectively, realizing further optimization of the cooling system. The third cooling circuit ensures the temperature stability of the bottom plate, while the fourth cooling circuit uses a carefully designed cooling channel to enable the cooling medium to flow evenly and efficiently through the B plate and the movable mold core, thereby significantly improving the cooling efficiency and temperature uniformity of the mold.

[0018] Optionally, the third cooling circuit includes a plurality of third cooling tubes, and the plurality of third cooling tubes are all arranged inside the base plate, and both ends of each of the third cooling tubes extend out of the side wall of the base plate.

[0019] By adopting the above technical solution, the third cooling circuit includes a plurality of third cooling pipes evenly distributed inside the bottom plate, and both ends of the third cooling pipes extend out of the side wall of the bottom plate to achieve seamless connection with the cooling system. This not only ensures that the bottom plate can be fully and evenly cooled, effectively avoiding the occurrence of local overheating, but also further improves the cooling efficiency and the accuracy of temperature control by optimizing the flow path of the cooling medium.

[0020] Optionally, the fourth cooling circuit includes multiple second cooling channels, each of the second cooling channels includes a second connecting pipe, two second vertical pipes and two second transverse pipes, the second transverse pipes correspond to the second vertical pipes one by one; the second connecting pipe is arranged inside the movable mold core, the two second transverse pipes are respectively located on two opposite sides of the B plate, the two second transverse pipes are coaxial, one end of each second transverse pipe is passed through the inside of the top plate, and the other end of each second transverse pipe extends out of the side wall of the top plate; the second vertical pipe passes through the B plate and the movable mold core at the same time, one end of the second vertical pipe is communicated with one end of the second transverse pipe passing through the inside of the top plate, and the other end of the second vertical pipe is communicated with the end of the second connecting pipe.

[0021] By adopting the above technical solution, the fourth cooling circuit includes multiple precisely laid out second cooling channels, each of which is precisely connected by a second connecting pipe, two second vertical pipes and two second horizontal pipes, forming an efficient and stable cooling network. The second connecting pipe is cleverly built into the movable mold core, while the second vertical pipe runs through the B plate and the movable mold core at the same time, and is precisely connected to the second horizontal pipe on both sides of the B plate, ensuring that the cooling medium can flow evenly and efficiently through the entire cooling circuit. Not only does it greatly improve the cooling efficiency of the movable mold core and the B plate, making the mold temperature more stable and controllable, but it also further enhances the cooling uniformity and response speed by optimizing the flow path of the cooling medium.

[0022] Optionally, the gate mechanism includes a nozzle, a water inlet pipe and a water outlet pipe are arranged on the A plate, and a vertical water inlet hole, a horizontal water inlet hole, a spiral water inlet hole, an intermediate connecting hole, a spiral water outlet hole, a horizontal water outlet hole and a vertical water outlet hole are opened on the nozzle, the bottom end of the vertical water inlet hole is interconnected with one end of the horizontal water inlet hole, the other end of the horizontal water inlet hole is interconnected with one end of the spiral water inlet hole, the other end of the spiral water inlet hole is interconnected with one end of the intermediate connecting hole, and the other end of the intermediate connecting hole is connected to the spiral One end of the water outlet holes are interconnected, the other end of the spiral water outlet hole is interconnected with one end of the horizontal water outlet hole, and the other end of the horizontal water outlet hole is interconnected with one end of the vertical water outlet hole; one end of the water inlet pipe is passed through the interior of the A plate and is interconnected with the other end of the vertical water inlet hole, and the other end of the water inlet pipe extends out of the side wall of the A plate; one end of the water outlet pipe is passed through the interior of the A plate and is interconnected with the other end of the vertical water outlet hole, and the other end of the water outlet pipe extends out of the side wall of the A plate.

[0023] By adopting the above technical solution, the nozzle of the gate mechanism includes multiple precisely connected water inlet holes and water outlet holes. These holes start from the vertical water inlet hole, pass through the horizontal water inlet hole, the spiral water inlet hole, the intermediate connecting hole, the spiral water outlet hole, the horizontal water outlet hole, and finally merge into the vertical water outlet hole, forming a complex and efficient cooling medium flow path. The water inlet pipe and the water outlet pipe allow the cooling medium to smoothly enter the nozzle from the outside of the A plate, pass through the cooling channel, and then be discharged from the other side of the A plate. The spiral water inlet hole and the spiral water outlet hole not only greatly increase the contact area between the cooling medium and the inside of the nozzle, improve the cooling efficiency, but also effectively promote the uniform distribution of the cooling medium, making the mold temperature more stable and controllable.

[0024] Optionally, a first heat insulation board is fixedly provided on the surface of the fixed mold, and a second heat insulation board is provided on the surface of the movable mold.

[0025] By adopting the above technical solution, not only the thermal insulation performance of the mold system is enhanced, the temperature fluctuation caused by heat transfer during the operation of the mold is effectively reduced, but also the overall thermal stability and service life of the mold are improved.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The cavity is formed by precisely docking the fixed mold core with the molding groove in the mold frame mechanism. Combined with the cooling pipe mechanism widely laid inside the mold, the cooling process is significantly accelerated and the molding cycle is shortened from the traditional 35 seconds to 30 seconds, thereby greatly improving production efficiency and capacity; 2. The zoned cooling design of the cooling pipe mechanism includes the first and second cooling circuits for the panel, A plate and fixed mold core, and the third and fourth cooling circuits for the bottom plate, B plate and movable mold core, which ensures the stability of the mold temperature and effectively avoids the deformation of the light guide plate due to mold overheating. At the same time, it reduces the wire drawing phenomenon during the nozzle molding process and improves the product quality; 3. The mold frame mechanism adopts a fixed connection between the runner plate and the mold frame assembly, and a mounting seat design including beryllium copper inserts, which not only ensures the stability of the structure, but also optimizes the cooling effect. At the same time, the first and second heat insulation plates are respectively set on the surface of the fixed mold and the movable mold, which enhances the heat insulation performance of the mold system, reduces temperature fluctuations, and improves the thermal stability and service life of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the light guide plate forming mold in an embodiment of the present application.

[0028] Figure 2 It is a structural schematic diagram of the fixed mold in the embodiment of the present application.

[0029] Figure 3 It is a schematic diagram of the structure of the movable mold in the embodiment of the present application.

[0030] Figure 4 It is a structural schematic diagram of the cooling pipe mechanism in the embodiment of the present application.

[0031] Figure 5 It is a schematic diagram of the structure of the water inlet pipe, the water outlet pipe and the nozzle in the embodiment of the present application.

[0032] Description of reference numerals: 1. Fixed mold; 11. Fixed mold seat; 111. Panel; 112. Plate A; 113. First groove; 114. Water inlet pipe; 115. Water outlet pipe; 116. Positioning protrusion; 12. Fixed mold core; 13. First heat insulation board; 2. Moving mold; 21. Moving mold seat; 211. Bottom plate; 212. Plate B; 213. Square iron; 22. Frame mechanism; 221. Runner plate; 222. Frame assembly; 2221. Mounting seat; 2222. Beryllium copper insert; 2223. Mounting block; 223. Moving mold core; 224. Forming groove; 225. Water inlet groove; 226. Through hole; 23. Second heat insulation board; 3. First cooling circuit ; 31. first cooling pipe; 4. second cooling circuit; 41. first cooling channel; 411. first connecting pipe; 412. first vertical pipe; 413. first horizontal pipe; 5. third cooling circuit; 51. third cooling pipe; 6. fourth cooling circuit; 61. second cooling channel; 611. second connecting pipe; 612. second vertical pipe; 613. second horizontal pipe; 7. nozzle; 71. vertical water inlet hole; 72. horizontal water inlet hole; 73. spiral water inlet hole; 74. middle connecting hole; 75. spiral water outlet hole; 76. horizontal water outlet hole; 77. vertical water outlet hole; 8. ejector mechanism; 81. ejector plate; 82. ejector pin. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-5 This application is described in further detail.

[0034] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be the common meanings understood by those skilled in the art to which this application belongs. The "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components.

[0035] The present application embodiment discloses a light guide plate forming mold. Figure 1 and Figure 2 The light guide plate molding mold includes a fixed mold 1 and a movable mold 2. The fixed mold 1 includes a fixed mold seat 11. The fixed mold seat 11 includes a fixedly connected panel 111 and an A plate 112. The A plate 112 has two first grooves 113 on one side facing the movable mold 2. The outer side walls of the two fixed mold cores 12 abut against the inner side walls of the first grooves 113. The two fixed mold cores 12 are fixedly connected to the A plate 112. An isolation block 14 is also provided between the two fixed mold cores 12. The first grooves 113 on the A plate 112 accurately accommodate and fix the fixed mold core 12, ensuring the stability of the mold structure and the accuracy of molding.

[0036] Reference Figure 1 and Figure 3The movable mold 2 includes a movable mold base 21, and the movable mold base 21 includes a fixedly connected bottom plate 211, a B plate 212 and two square irons 213. The two square irons 213 are located between the bottom plate 211 and the B plate 212. The side of each square iron 213 facing the bottom plate 211 is fixedly connected to the bottom plate 211, and the side of each square iron 213 facing the B plate 212 is fixedly connected to the B plate 212. A mold frame mechanism 22 is provided on the B plate 212, and two molding grooves 224 are formed inside the mold frame mechanism 22. Six positioning protrusions 116 are fixedly provided on the side of the A plate 112 facing the B plate 212, and the six positioning protrusions 116 are enclosed to form a rectangular shape. When the mold enters the mold closing state, the fixed mold 1 and the movable mold 2 are tightly fitted. At this time, the outer side wall of the mold frame mechanism 22 abuts against the inner side wall of the six positioning protrusions 116, thereby achieving precise alignment between the fixed mold and the movable mold. The fixed mold core 12 and the molding groove 224 in the mold frame mechanism 22 perfectly enclose two cavities, providing a precise space for the molding of the light guide plate. Driven by the injection molding machine, the molten plastic is injected into these cavities, and after cooling and solidification, a light guide plate with a specific shape and optical performance can be formed.

[0037] Reference Figure 3 The mold frame mechanism 22 includes a flow channel plate 221 and a mold frame assembly 222. The flow channel plate 221 and the mold frame assembly 222 are both fixed on the movable mold seat 21. The mold frame assembly 222 is rectangular. The flow channel plate 221 is located inside the mold frame assembly 222. The two ends of the flow channel plate 221 are respectively fixedly connected to the inner side walls of the mold frame assembly 222 on both sides that are parallel to each other. The flow channel plate 221 divides the mold frame mechanism 22 into two cavities. A movable mold core 223 is provided in each cavity. The outer side wall of the movable mold core 223 abuts against the inner side wall of the cavity. The movable mold core 223, the side wall of the flow channel plate 221 and the mold frame assembly 222 enclose a molding groove 224. The depth of the molding groove 224 is the depth of the mold frame assembly 222 higher than the movable mold core 223. A water inlet groove 225 is provided on the surface of the flow channel plate 221. Both ends of the water inlet groove 225 are open and respectively connected to the two molding grooves 224. The flow channel plate 221 is provided with a plurality of through holes 226 for the ejection mechanism 8 to pass through.

[0038] Continue to refer to Figure 3The mold frame assembly 222 includes a plurality of fixedly connected mounting seats 2221, each mounting seat 2221 includes a beryllium copper insert 2222 and a plurality of mounting blocks 2223, and the plurality of mounting blocks 2223 are fixed to the surface of the B plate. The beryllium copper insert 2222 is fixed to one of the mounting blocks 2223, and the beryllium copper insert 2222 is located on the side of the mounting seat 2221 close to the molding groove 224. The flow channel plate 221 not only serves as a guiding channel for the water flow, but also separates the mold frame mechanism 22 into two independent molding spaces, each of which is precisely embedded with a movable mold core 223, and defines a molding groove 224 together with the side wall of the flow channel plate 221 and the mold frame assembly 222, to ensure the accuracy and consistency of the light guide plate molding. The mold frame assembly 222 is formed by a plurality of mounting seats 2221 including beryllium copper inserts 2222, which not only ensures the stability of the structure, but also optimizes the cooling effect by utilizing the high thermal conductivity of beryllium copper. The sprue groove 225 provided on the flow channel plate 221 realizes the balanced distribution of the injection material and effectively avoids the wire drawing phenomenon. At the same time, the through hole 226 provided on its surface cooperates with the sliding movement of the ejection mechanism 8, so that the sprue can be easily ejected, thereby improving the production efficiency.

[0039] Reference Figure 3 and Figure 4 The ejection mechanism 8 is slidably arranged between the two square irons 213. The movable mold seat 21 is provided with an ejection mechanism 8 for ejecting the water outlet. The ejection mechanism 8 includes two fixedly connected ejector plates 81 and a plurality of ejector pins 82. One end of each ejector pin 82 is fixedly connected to the ejector plate 81, and the other end of each ejector pin 82 passes through the through hole 226 and slides with the water outlet plate. The two ejector plates 81 achieve a smooth sliding movement between the square irons 213, and the bottom of the ejector plate 81 is equipped with a plurality of reset springs. The function of these reset springs is to help the ejector plate 81 and the ejector pin 82 to quickly reset after the ejection action is completed, so as to prepare for the next ejection operation. After the light guide plate is formed and the mold opening action is completed, the ejection mechanism 8 starts to work. The ejector plate 81 is pushed by a driving mechanism (such as a hydraulic or pneumatic system) so that the ejector pin 82 slides along the through hole 226, thereby ejecting the water outlet from the water outlet groove 225. Since the ejector pins correspond to the through holes 226 one by one, and each ejector pin forms a sliding fit with the flow channel plate 221, this process is not only efficient, but also can ensure that the water inlet and the light guide plate are ejected smoothly and without damage.

[0040] Reference Figure 4 and Figure 5The fixed mold 1 is provided with a gate mechanism, which is connected to the mold cavity. The gate mechanism includes a nozzle 7, a water inlet pipe 114 and a water outlet pipe 115 are provided on the A plate 112, and the nozzle 7 is provided with a vertical water inlet hole 71, a horizontal water inlet hole 72, a spiral water inlet hole 73, an intermediate connecting hole 74, a spiral water outlet hole 75, a horizontal water outlet hole 76 and a vertical water outlet hole 77. The bottom end of the vertical water inlet hole 71 is connected to one end of the horizontal water inlet hole 72, the other end of the horizontal water inlet hole 72 is connected to one end of the spiral water inlet hole 73, the other end of the spiral water inlet hole 73 is connected to one end of the intermediate connecting hole 74, the other end of the intermediate connecting hole 74 is connected to one end of the spiral water outlet hole 75, the other end of the spiral water outlet hole 75 is connected to one end of the horizontal water outlet hole 76, and the other end of the horizontal water outlet hole 76 is connected to one end of the vertical water outlet hole 77. One end of the water inlet pipe 114 is inserted into the A plate 112 and is interconnected with the other end of the vertical water inlet hole 71. The other end of the water inlet pipe 114 extends out of the side wall of the A plate 112. One end of the water outlet pipe 115 is inserted into the A plate 112 and is interconnected with the other end of the vertical water outlet hole 77. The other end of the water outlet pipe 115 extends out of the side wall of the A plate 112. The nozzle 7 of the gate mechanism includes a plurality of precisely connected water inlet holes and water outlet holes. These holes start from the vertical water inlet hole 71, pass through the horizontal water inlet hole 72, the spiral water inlet hole 73, the middle connecting hole 74, the spiral water outlet hole 75, the horizontal water outlet hole 76, and finally merge into the vertical water outlet hole 77, forming a complex and efficient cooling medium flow path. The water inlet pipe 114 and the water outlet pipe 115 allow the cooling medium to smoothly enter the nozzle 7 from the outside of the A plate 112, pass through the cooling channel, and then be discharged from the other side of the A plate 112. It is worth noting that the functions of the water inlet pipe 114 and the water outlet pipe 115 can be flexibly adjusted according to actual conditions, that is, they can be used interchangeably to meet different cooling requirements.

[0041] Reference Figure 5 , when the cooling medium enters the nozzle 7 through the water inlet pipe 114, it will flow along the designed channel path. In particular, the spiral water inlet hole 73 and the spiral water outlet hole 75 not only greatly increase the contact area between the cooling medium and the inside of the nozzle 7, but also promote the uniform distribution of the cooling medium. The mold temperature can be more stable and controllable, thereby improving the quality and production efficiency of the injection molded products. First, by optimizing the flow path of the cooling medium and increasing the contact area, we have significantly improved the cooling efficiency and shortened the injection cycle. Secondly, the spiral water inlet hole 73 and the spiral water outlet hole 75 not only greatly increase the contact area between the cooling medium and the inside of the nozzle 7, improving the cooling efficiency, but also effectively promote the uniform distribution of the cooling medium, making the mold temperature more stable and controllable. Finally, the interchangeability of the water inlet pipe 114 and the water outlet pipe 115 increases the flexibility and practicality of the system, allowing users to flexibly adjust the flow direction and flow rate of the cooling medium according to actual conditions.

[0042] Reference Figure 2 and Figure 3 Cooling pipe mechanisms are provided inside the fixed mold base 11, the fixed mold core 12, the movable mold base 21 and the mold frame mechanism 22. The molding grooves in the fixed mold core 12 and the mold frame mechanism 22 are precisely docked to form a cavity when the mold is closed, thereby realizing efficient molding of the light guide plate. The cooling pipe mechanism widely laid inside the mold accelerates the cooling process, shortening the molding cycle from the traditional longer 35 seconds to 30 seconds, greatly improving production efficiency and capacity. At the same time, it also ensures the stability of the mold temperature, effectively avoiding the deformation of the light guide plate due to overheating of the mold. In addition, the wire drawing phenomenon in the nozzle molding process is reduced, which facilitates the smooth ejection of the nozzle and further improves the product quality.

[0043] Reference Figure 4 The cooling pipe mechanism includes a first cooling circuit 3 and a second cooling circuit 4. The first cooling circuit 3 is used to cool the panel 111, and the second cooling circuit 4 is used to cool the A plate 112 and the fixed mold core 12 at the same time. The cooling pipe mechanism is divided into a first cooling circuit 3 and a second cooling circuit 4, which cool the panel 111, the A plate 112 and the fixed mold core 12 respectively. This partitioned cooling not only improves the cooling efficiency and makes the mold temperature more uniform and stable, but also effectively shortens the molding cycle, further improving production efficiency and product quality.

[0044] Continue to refer to Figure 4 The first cooling circuit 3 includes a plurality of mutually parallel cooling tubes, the plurality of first cooling tubes 31 are all arranged inside the panel 111, and both ends of each first cooling tube 31 extend out of the panel 111. The first cooling circuit 3 includes a plurality of precisely laid out first cooling tubes 31, which are embedded inside the panel 111, and both ends of the first cooling tubes 31 extend out of the panel 111 for easy connection to the cooling system. It not only ensures the effective cooling of the panel 111 and improves the temperature stability of the mold as a whole, but also enhances the uniformity and efficiency of cooling through the evenly distributed cooling tubes. Combined with the mold frame mechanism 22 and the fixed mold seat 11, as well as the precise cooling of the A plate 112 and the fixed mold core 12 by the second cooling circuit 4, the entire mold system achieves efficient and stable cooling performance, providing a solid foundation for the high-quality and efficient production of light guide plates.

[0045] Reference Figure 2 and Figure 4The second cooling circuit 4 includes a plurality of first cooling channels 41, each of which includes a first connecting pipe 411, two first vertical pipes 412 and two first transverse pipes 413, and the first transverse pipes 413 correspond to the first vertical pipes 412 one by one. The first connecting pipe 411 is arranged inside the fixed mold core 12, and the two first transverse pipes 413 are respectively located on the opposite sides of the A plate 112, and the two first transverse pipes 413 are coaxial, and one end of each first transverse pipe 413 is passed through the inside of the top plate, and the other end of each first transverse pipe 413 extends out of the side wall of the top plate; the first vertical pipe 412 passes through the A plate 112 and the fixed mold core 12 at the same time, and one end of the first vertical pipe 412 is communicated with one end of the first transverse pipe 413 passed through the inside of the top plate, and the other end of the first vertical pipe 412 is communicated with the end of the first connecting pipe 411. The second cooling circuit 4 includes a plurality of first cooling channels 41, and each first cooling tube 31 is precisely connected by a first connecting tube 411, two first vertical tubes 412 and two first transverse tubes 413, forming an efficient cooling circulation system. The first connecting tube 411 is arranged inside the fixed mold core 12, and the first vertical tube 412 runs through the A plate 112 and the fixed mold core 12 at the same time, and is precisely connected with the first transverse tube 413 on both sides of the A plate 112, ensuring that the cooling medium can flow smoothly and evenly through the entire cooling circuit. Not only does it significantly improve the cooling efficiency of the fixed mold core 12 and the A plate 112, making the mold temperature more stable, but it also further enhances the uniformity and efficiency of cooling by optimizing the flow path of the cooling medium.

[0046] Reference Figure 3 and Figure 4 , the movable mold core 223 is fixedly connected to the B plate 212; the cooling pipe mechanism also includes a third cooling circuit 5 and a fourth cooling circuit 6, the third cooling circuit 5 is used to cool the bottom plate 211, and the fourth cooling circuit 6 is used to cool the B plate 212 and the movable mold core 223 at the same time. The movable mold base 21 is a fixed connection structure between the bottom plate 211 and the B plate 212, and the movable mold core 223 is accurately fixed on the B plate 212, ensuring the stability of the mold structure and the accurate positioning of the movable mold core 223. At the same time, the third cooling circuit 5 and the fourth cooling circuit 6 in the cooling pipe mechanism cool the bottom plate 211, the B plate 212 and the movable mold core 223 respectively, realizing further optimization of the cooling system. The third cooling circuit 5 ensures the temperature stability of the bottom plate 211, and the fourth cooling circuit 6 uses the cooling channel to enable the cooling medium to flow through the B plate 212 and the movable mold core 223 evenly and efficiently, thereby significantly improving the cooling efficiency and temperature uniformity of the mold.

[0047] Continue to refer to Figure 3 and Figure 4The third cooling circuit 5 includes a plurality of third cooling pipes 51 parallel to each other, and the plurality of third cooling pipes 51 are all arranged inside the bottom plate 211, and both ends of each third cooling pipe 51 extend out of the side wall of the bottom plate 211. The third cooling circuit 5 includes a plurality of third cooling pipes 51 evenly distributed inside the bottom plate 211, and both ends of the third cooling pipes 51 extend out of the side wall of the bottom plate 211, so as to achieve seamless connection with the cooling system. It not only ensures that the bottom plate 211 can be fully and evenly cooled, effectively avoiding the occurrence of local overheating, but also further improves the cooling efficiency and the accuracy of temperature control by optimizing the flow path of the cooling medium.

[0048] Continue to refer to Figure 3 and Figure 4 The fourth cooling circuit 6 includes a plurality of second cooling channels 61, each of which includes a second connecting pipe 611, two second vertical pipes 612 and two second transverse pipes 613, and the second transverse pipes 613 correspond to the second vertical pipes 612 one by one; the second connecting pipe 611 is arranged inside the movable mold core 223, the two second transverse pipes 613 are respectively located on the opposite sides of the B plate 212, the two second transverse pipes 613 are coaxial, one end of each second transverse pipe 613 is passed through the inside of the top plate, and the other end of each second transverse pipe 613 extends out of the side wall of the top plate; the second vertical pipe 612 penetrates the B plate 212 and the movable mold core 223 at the same time, one end of the second vertical pipe 612 is communicated with one end of the second transverse pipe 613 passed through the inside of the top plate, and the other end of the second vertical pipe 612 is communicated with the end of the second connecting pipe 611. The fourth cooling circuit 6 includes a plurality of precisely laid out second cooling channels 61, each of which is precisely connected by a second connecting pipe 611, two second vertical pipes 612 and two second transverse pipes 613, forming an efficient and stable cooling network. The second connecting pipe 611 is cleverly built into the movable mold core 223, while the second vertical pipe 612 runs through the B plate 212 and the movable mold core 223 at the same time, and is precisely connected to the second transverse pipe 613 on both sides of the B plate 212, ensuring that the cooling medium can flow evenly and efficiently through the entire cooling circuit. Not only does it greatly improve the cooling efficiency of the movable mold core 223 and the B plate 212, making the mold temperature more stable and controllable, but it also further enhances the cooling uniformity and response speed by optimizing the flow path of the cooling medium.

[0049] In the process of molding products, efficient thermal management is achieved by setting the mold temperature to 120-130 degrees Celsius and accurately controlling the mold core gap within the range of 28 to 29. The use of a circulating water circuit significantly speeds up the cooling speed. This improvement measure directly shortens the molding cycle from the original 35 seconds to 30 seconds, and the overall molding time is reduced by 5 seconds. Not only does it improve production efficiency, it also further enhances production capacity. More importantly, all sheets are cooled through the water circuit, ensuring a rapid and uniform cooling process while maintaining the stability of the mold temperature, laying a solid foundation for continuous and efficient production.

[0050] Reference Figure 1 In the fixed mold 1, a first heat insulation board 13 is fixedly arranged on the surface of the panel 111; in the movable mold 2, a second heat insulation board 23 is arranged on the surface of the bottom plate 211. This not only enhances the heat insulation performance of the mold system, effectively reduces the temperature fluctuation caused by heat transfer during the working process of the mold, but also improves the overall thermal stability and service life of the mold.

[0051] The implementation principle of the above embodiment is as follows: first, the mold is composed of a fixed mold 1 and a movable mold 2. When the two are molded together, the fixed mold core 12 is precisely docked with the mold frame mechanism 22 in the movable mold 2 to form a cavity. The accuracy and consistency of the light guide plate molding are ensured. Secondly, cooling pipe mechanisms are widely laid inside the mold, including multiple cooling circuits for different components. These cooling circuits significantly improve the cooling efficiency of the mold by optimizing the layout and the flow path of the cooling medium, so that the molding cycle is shortened from the traditional 35 seconds to 30 seconds, thereby greatly improving production efficiency and capacity. At the same time, the cooling pipe mechanism also ensures the stability of the mold temperature and effectively avoids the deformation of the light guide plate due to overheating of the mold. In addition, the first heat insulation board 13 and the second heat insulation board 23 enhance the thermal insulation performance of the mold system, reduce the temperature fluctuation caused by heat transfer during the operation of the mold, and improve the overall thermal stability and service life of the mold. Finally, the ejection mechanism 8 of the mold is reasonably designed to ensure that the water inlet and the light guide plate are ejected smoothly and without damage, thereby improving production efficiency. At the same time, the sprue groove 225 on the flow channel plate 221 realizes balanced distribution of the injection material and effectively avoids wire drawing.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A light guide plate forming mold, characterized in that: The invention comprises a fixed mold (1) and a movable mold (2), wherein the fixed mold (1) comprises a fixed mold seat (11), and at least one fixed mold core (12) is arranged on one side of the fixed mold seat (11) facing the movable mold (2); the movable mold (2) comprises a movable mold seat (21), and a mold frame mechanism (22) is arranged on the movable mold seat (21), and at least one molding groove (224) is formed inside the mold frame mechanism (22); when the mold is in a mold closing state, the fixed mold core (12) and the molding groove (224) are enclosed to form a mold cavity; a cooling pipe mechanism is arranged inside the fixed mold seat (11), inside the fixed mold core (12), inside the movable mold seat (21) and inside the mold frame mechanism (22); a gate mechanism is arranged on the fixed mold (1), and the gate mechanism is connected to the mold cavity; and an ejection mechanism (8) for ejecting a water outlet is arranged on the movable mold seat (21).

2. The light guide plate forming mold according to claim 1, characterized in that: The mold frame mechanism (22) comprises a flow channel plate (221) and a mold frame assembly (222); the flow channel plate (221) and the mold frame assembly (222) are both fixed on the movable mold base (21); the mold frame assembly (222) is rectangular; the sprue machine is located inside the mold frame assembly (222); the two ends of the flow channel plate (221) are respectively fixedly connected to the inner side walls of the mold frame assembly (222) on both sides which are parallel to each other; the flow channel plate (221) divides the mold frame mechanism (22) into two cavities; a movable mold core (223) is arranged in each cavity; the outer side wall of the movable mold core (223) abuts against the inner side wall of the cavity; the movable mold core (223) and the side wall of the flow channel plate (221) are in contact with the mold frame assembly; The mold frame assembly (222) is enclosed to form a molding groove (224), the depth of the molding groove (224) being the depth of the mold frame assembly (222) above the movable mold core (223); a nozzle groove (225) is provided on the surface of the flow channel plate (221), both ends of the nozzle groove (225) are open and respectively connected to the two molding grooves (224); a plurality of through holes (226) for the ejection mechanism (8) to pass through are provided on the flow channel plate (221), the ejection mechanism (8) passes through the through holes (226) and is slidably matched with the flow channel plate (221); the mold frame assembly (222) comprises a plurality of fixedly connected mounting seats (2221), each of the mounting seats (2221) comprises a beryllium copper insert (2222).

3. The light guide plate forming mold according to claim 1, characterized in that: The fixed mold seat (11) comprises a panel (111) and an A plate (112) which are fixedly connected, the A plate (112) being provided with a first groove (113), the outer wall of the fixed mold core (12) being in contact with the inner wall of the first groove (113), and the fixed mold core (12) being fixedly connected to the A plate (112); the cooling pipe mechanism comprises a first cooling circuit (3) and a second cooling circuit (4), the first cooling circuit (3) being used for cooling the panel (111), and the second cooling circuit (4) being used for cooling the A plate (112) and the fixed mold core (12) simultaneously.

4. The light guide plate forming mold according to claim 3, characterized in that: The first cooling circuit (3) comprises a plurality of cooling tubes (31), the plurality of cooling tubes (31) are all arranged inside the panel (111), and both ends of each cooling tube (31) extend out of the panel (111).

5. The light guide plate forming mold according to claim 3, characterized in that: The second cooling circuit (4) comprises a plurality of first cooling channels (41), each of the first cooling channels (41) comprises a first connecting pipe (411), two first vertical pipes (412) and two first transverse pipes (413), the first transverse pipes (413) corresponding to the first vertical pipes (412) one by one; the first connecting pipe (411) is arranged inside the fixed mold core (12), the two first transverse pipes (413) are respectively located on opposite sides of the A plate (112), and the two first transverse pipes (413) are respectively located on opposite sides of the A plate (112). The first vertical tube (412) and the first horizontal tube (413) are coaxial, one end of each of the first horizontal tubes (413) is passed through the interior of the top plate, and the other end of each of the first horizontal tubes (413) extends out of the side wall of the top plate; the first vertical tube (412) passes through the A plate (112) and the fixed mold core (12) at the same time, one end of the first vertical tube (412) is communicated with one end of the first horizontal tube (413) passed through the interior of the top plate, and the other end of the first vertical tube (412) is communicated with the end of the first connecting tube (411).

6. The light guide plate forming mold according to claim 2, characterized in that: The movable mold base (21) comprises a bottom plate (211) and a B plate (212) which are fixedly connected, and the movable mold core (223) is fixedly connected to the B plate (212); the cooling pipe mechanism comprises a third cooling circuit (5) and a fourth cooling circuit (6), the third cooling circuit (5) is used to cool the bottom plate (211), and the fourth cooling circuit (6) is used to cool the B plate (212) and the movable mold core (223) at the same time.

7. The light guide plate forming mold according to claim 6, characterized in that: The third cooling circuit (5) comprises a plurality of third cooling tubes 51, and the plurality of third cooling tubes 51 are all arranged inside the bottom plate (211), and both ends of each third cooling tube 51 extend out of the side wall of the bottom plate (211).

8. The light guide plate forming mold according to claim 6, characterized in that: The fourth cooling circuit (6) comprises a plurality of second cooling channels (61), each of the second cooling channels (61) comprises a second connecting pipe (611), two second vertical pipes (612) and two second transverse pipes (613), the second transverse pipes (613) corresponding to the second vertical pipes (612) one by one; the second connecting pipe (611) is arranged inside the movable mold core (223), the two second transverse pipes (613) are respectively located on opposite sides of the B plate (212), and the two second transverse pipes ( The second vertical tube (612) is coaxial with the second horizontal tube (613), one end of each of the second horizontal tubes (613) is passed through the interior of the top plate, and the other end of each of the second horizontal tubes (613) extends out of the side wall of the top plate; the second vertical tube (612) passes through the B plate (212) and the movable mold core (223) at the same time, one end of the second vertical tube (612) is communicated with one end of the second horizontal tube (613) passed through the interior of the top plate, and the other end of the second vertical tube (612) is communicated with the end of the second connecting tube (611).

9. The light guide plate forming mold according to claim 3, characterized in that: The gate mechanism comprises a nozzle (7), a water inlet pipe (114) and a water outlet pipe (115) are arranged on the A plate (112), and the nozzle (7) is provided with a vertical water inlet hole (71), a horizontal water inlet hole (72), a spiral water inlet hole (73), an intermediate connecting hole (74), a spiral water outlet hole (75), a horizontal water outlet hole (76) and a vertical water outlet hole (77), the bottom end of the vertical water inlet hole (71) is interconnected with one end of the horizontal water inlet hole (72), the other end of the horizontal water inlet hole (72) is interconnected with one end of the spiral water inlet hole (73), the other end of the spiral water inlet hole (73) is interconnected with one end of the intermediate connecting hole (74), and the other end of the intermediate connecting hole (74) is interconnected with the bottom end of the vertical water inlet hole (71). One end of the spiral water outlet hole (75) is interconnected, the other end of the spiral water outlet hole (75) is interconnected with one end of the horizontal water outlet hole (76), and the other end of the horizontal water outlet hole (76) is interconnected with one end of the vertical water outlet hole (77); one end of the water inlet pipe (114) is passed through the interior of the A plate (112) and is interconnected with the other end of the vertical water inlet hole (71), and the other end of the water inlet pipe (114) extends out of the side wall of the A plate (112); one end of the water outlet pipe (115) is passed through the interior of the A plate (112) and is interconnected with the other end of the vertical water outlet hole (77), and the other end of the water outlet pipe (115) extends out of the side wall of the A plate (112).

10. The light guide plate forming mold according to claim 1, characterized in that: A first heat insulation board (13) is fixedly arranged on the surface of the fixed mold (1), and a second heat insulation board (23) is arranged on the surface of the movable mold (2).

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