Ornamental ring injection mold and injection method thereof

Abstract

The present application relates to injection mold technical field, specifically is ring decoration ring injection mold and injection molding method thereof, including injection molding structure, injection molding structure includes fixed mold base, fixed mold base is equipped with cavity, the lower portion of fixed mold base is equipped with movable mold base that can carry out up and down displacement, movable mold base is equipped with insert, the insert in movable mold base can be matched with the cavity in fixed mold base and the gap that the insert and the cavity leave can form ring decoration product, fixed mold base is equipped with flow channel that can be communicated with the gap and molten liquid can be injected into the gap along flow channel, the insert can be used for cooling treatment of injection molding ring decoration product, the outside of movable mold base is equipped with mold locking buckle assembly that can lock the resistance of fixed mold base and movable mold base, fixed mold base and movable mold base are equipped with gate automatic shearing assembly that can automatically shear the gate in flow channel when fixed mold base and movable mold base carry out mold opening operation.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, specifically to a decorative ring injection mold and its injection method. Background Technology

[0002] The decorative frame is an important component of automotive lights. Due to its special position and purpose within the light, the decorative frame is exposed, and the surface of the product requires texture, high gloss, and electroplating, resulting in a very high appearance. At the same time, the product is mounted on the lens, and its exterior decoration serves to cover and decorate. Under the strong light of the lens, any defects in the product's appearance become more obvious. The product is usually small, but has a relatively complex structure. Solving the problem of structural demolding within a compact space while ensuring the product's appearance greatly increases the difficulty of mold development. Its appearance and function are indispensable parts of automotive lights.

[0003] Moreover, the product has a small space, and structural design on the product can easily lead to uneven cooling, imprint marks, and color differences. During the design process, it is necessary to focus on making the mold movement structure smaller to reduce color differences caused by uneven cooling due to the structure. It is also necessary to fully consider the cooling of the thin steel parts of the product to avoid color differences on the product's appearance due to heat accumulation in the thin steel.

[0004] After the product is injection molded, the gate needs to be trimmed. However, most trimming methods involve removing the product and investing a lot of labor costs, which can easily reduce the product's pass rate. Therefore, we propose a decorative ring injection mold and its injection method. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a decorative ring injection mold and its injection molding method, thus solving the problems mentioned in the background section.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a decorative ring injection mold, comprising an injection structure, wherein the injection structure includes a fixed mold base, the fixed mold base having a cavity, and a movable mold base below the fixed mold base capable of vertical displacement, the movable mold base having an insert, the insert in the movable mold base being able to mate with the cavity in the fixed mold base, and a gap being left between the insert and the cavity to form a decorative ring product, the fixed mold base having a flow channel communicating with the gap, and molten liquid being able to be injected along the flow channel into the cavity. The insert in the gap can be used to cool the injection-molded decorative ring product. The outside of the moving mold base is provided with a mold locking buckle assembly that can lock the contact between the fixed mold base and the moving mold base. The fixed mold base and the moving mold base are provided with an automatic gate shearing assembly that can automatically shear the gate in the runner when the fixed mold base and the moving mold base are opened. The moving mold base is provided with an ejector core pulling assembly that can cooperate with the insert and can eject the injection-molded decorative ring product between the cavity and the insert and can perform a release buckle action.

[0009] Furthermore, the insert includes a base, on which a 3D printed insert connected to the base is provided, and the 3D printed insert has conformal cooling water channels arranged along the interior of the 3D printed insert.

[0010] Furthermore, one side of the 3D printed insert is higher than the other side. The inlet of the conformal cooling water channel is located at the bottom of the base. The conformal cooling water channel is irregularly arranged along the internal shape of the 3D printed insert. The outlet of the conformal cooling water channel is located at the bottom of the base. The height of the inlet side of the conformal cooling water channel is lower than the height of the outlet side. The 3D printed insert is fastened to the base with bolts. The 3D grafting printing principle of the 3D printed insert in this solution is as follows: The principle of 3D printing technology is to use a high-energy laser beam to sinter metal powder material in a selected area, layer by layer, to form a shape that is close to the CAD drawing. Grafting printing, on the other hand, only builds up the parts to be printed under the premise of selecting the base. Then, the whole part is heat-treated and tempered to relieve stress. Combined with ordinary machining, excess steel is removed to complete the final part forming. As shown in the diagram, the insert is divided into two parts (base + 3D printing). The base is manufactured using conventional machining, and then 3D printing is used to fuse them together layer by layer, ultimately forming a single, integrated insert. This solves the problem of difficult cooling around the protruding sharp corners, and the conformal cooling water channels ensure uniform cooling of the product, thus guaranteeing its appearance, reducing the molding cycle, and improving production efficiency. Furthermore, the base can be procured and machined conventionally, while 3D printing only the necessary parts reduces costs.

[0011] Furthermore, the mold locking assembly includes a locking module, which is installed in the moving mold base and can contact the surface of the fixed mold base. The locking module is provided with a locking element that can be inserted into the fixed mold base and lock the fixed mold base. To unlock the mold locking mechanism: manually pull out the pin, remove the locking module, rotate it 180°, and place it on the corresponding hole on the fixed mold side. Then insert the pin into the fixing threaded pin. The mold locking mechanism will open, and the mold can be opened. To close the mold locking mechanism: manually pull out the pin, remove the locking module, rotate it 180°, and place it on the corresponding locking hole of the moving and fixed molds. Then insert the pin into the fixing threaded pin. The mold locking mechanism will close, and the mold can be lifted and moved.

[0012] Furthermore, the lock module can be embedded in the moving mold base, and the locking element includes a fixed threaded pin, which is threadedly installed in the lock module, and the fixed threaded pin is provided with a pin that can be inserted into the lock module.

[0013] Furthermore, the automatic gate shearing assembly includes a pull buckle, which is installed in the moving mold base. The fixed mold base has a shovel, and the pull buckle can drive the shovel to move during mold opening operations. The fixed mold base has a swing arm that can contact the shovel, and the shovel can drive the swing arm to rotate during movement. The fixed mold base has a connecting guide block connected to the swing arm and capable of vertical displacement along the interior of the fixed mold base. The fixed mold base also has a cutter connected to the connecting guide block and capable of automatically shearing the gate in the runner. The mold opening shearing working principle is as follows: When the mold opens, the pull buckle is fixed on the moving mold base. The pull buckle drives the shovel to move (while simultaneously compressing the spring). The shovel's movement drives the swing arm to rotate around its axis. The swing arm drives the connecting guide block and the cutter to move (while simultaneously compressing the spring). The cutter squeezes the runner and cuts off the gate. At this point, the pull buckle has just completed driving the shovel, and the mold opening action is complete. The spring and springs that were compressed during the previous action will quickly return to their original state after the pull buckle completely releases its drive.

[0014] Furthermore, the pull buckle is installed in the moving mold base by bolts, the shovel is provided with a first return spring that is connected to the interior of the fixed mold base and has elastic return, the fixed mold base is provided with a swing rod guide block for limiting and guiding the swing rod, the swing rod is installed in the swing rod guide block through a rotating shaft, the swing rod guide block is provided with a swing rod limiting block that can be inserted into the fixed mold base, the connecting guide block is provided with a second return spring that is connected to the interior of the fixed mold base and has elastic return, and the cutter is installed at the bottom end of the connecting guide block by bolts; the automatic gate shearing assembly is symmetrically arranged on both sides of the moving mold base.

[0015] Furthermore, the ejection core-pulling assembly includes multiple ejector rods, which are disposed in the moving mold base and are movable. The insert has an ejector block adapted to the insert, and the surface of the ejector block has a cover plate for assisting in the formation of the decorative ring product. The core-pulling device is sequentially arranged in the ejector block. The ejector rods can drive the ejector block to eject the decorative ring product. During the movement of the ejector block, the core-pulling device moves and achieves the unhooking action. Ejection-synchronized core-pulling action: The injection molding machine drives the lower ejector plate, which drives the ejector rod to push the ejector block out of the product. The core-pulling device is installed in the ejector block. At the same time as ejection, the core-pulling guide block is fixed in the moving mold base and does not move with the ejection. However, the core-pulling guide block is connected to the core-pulling dovetail groove, which allows the core-pulling device to retract inward during the ejection process with the ejector block, achieving the unhooking action.

[0016] Furthermore, a square iron plate that can contact the moving mold base is provided below the moving mold base. A lower ejector plate is provided within the square iron plate, and an upper ejector plate is provided above the lower ejector plate. An ejector block fixing seat connected to the ejector rod is provided within the upper ejector plate. A locking bolt that can be inserted into the upper ejector plate and can limit and lock the ejector rod is provided within the lower ejector plate. A core-pulling guide block is provided within the insert, and the core-pulling component can be displaced along the surface of the core-pulling guide block. An ejector block guide rod that can be loosely fitted with the ejector rod is provided within the moving mold base. A moving mold fixing plate that can be connected to the square iron plate is provided below the square iron plate. A dovetail block is provided at the top of the core-pulling guide block, and a dovetail groove adapted to the dovetail block is provided within the core-pulling component.

[0017] Furthermore, the injection molding method for the ring mold includes:

[0018] Step 1: During injection molding, the moving mold base can be moved by the injection molding machine, so that the moving mold base and the fixed mold base are tightly attached. Then, the fixing threaded pin can be inserted into the locking module, and the pin can be inserted into the fixing threaded pin, thereby locking the fixed mold base and the moving mold base, which facilitates the injection molding operation of the decorative ring product.

[0019] Step 2: After the molten liquid is injected into the gap between the cavity and the insert along the runner, cooling water can be injected into the conformal cooling water channel in the insert to accelerate the solidification of the molten liquid and make the product cool evenly until the decorative ring product is formed; Step 3: After the decorative ring product is formed, the pin, fixing threaded pin and locking module in Step 1 need to be removed in sequence. Then, the moving mold base and the fixed mold base can be opened. During the mold opening operation, the pull buckle drives the shovel to move. At the same time, the first return spring is compressed. When the shovel moves, it drives the rocker arm to rotate around the rotating shaft. During the rotation of the rocker arm, it drives the connecting guide block and the cutter to move. At the same time, the second return spring is compressed. The cutter will squeeze the runner and cut off the gate. At this time, the pull buckle just completes the drive of the shovel. The mold opening action is completed. After the pull buckle is completely released from the drive, the first return spring and the second return spring reset, so that the above-mentioned components are reset. Step 4: After the gate is cut, the fixed mold base and the moving mold base are separated. At this time, the lower ejector plate can be driven to move, so that the ejector pin can drive the ejector block to move, thereby ejecting the product. At the same time as ejection, the core puller moves along the surface of the core puller guide block, so that the core puller moves inward during the ejection movement with the ejector block, thereby realizing the unhooking action.

[0020] The product in this design requires not only a good appearance but also stable strength and high-temperature resistance. PC2407 high-temperature material is typically used. The material needs to be dried at 120°C for 4-6 hours beforehand. The molding temperature is 300-320°C, and the mold temperature is 120°C. The molding conditions are quite stringent. To reduce costs, customers usually opt for a wall thickness of 2.0mm. The injection pressure is generally between 90-130MPa, and the injection speed should not be too fast, with a filling speed of around 40mm / s. Otherwise, silver streaks and air bubbles may easily form on the product's appearance. Based on these adjustments, the product is molded under high pressure, high temperature, and slow speed. The dimensions of this product are 179X204X117mm (Note: 117 is the height of the mold in the demolding direction). The material is PC2407 thermoplastic. This material has the characteristics of a 0.6% shrinkage rate, good light transmittance, good heat resistance, low shrinkage, and high dimensional accuracy.

[0021] Compared with existing technologies, this decorative ring injection mold and its injection method, through the design of the locking buckle assembly and other structures, make the solution easy to assemble and disassemble, simple to process, and require no tools. The locking buckle is easy to operate, allowing for quick opening and closing without any tools. The automatic gate shearing assembly utilizes the principle of accelerated movement of the swing rod structure during mold opening to simultaneously achieve automatic gate shearing, saving mold cycle time and avoiding problems such as insufficient hydraulic cylinder driving force causing gate incomplete shearing. The mechanical structure is safe, reliable, and practical, requiring minimal space in the mold and usable in most environments. The standardized structure only requires cutter replacement, simplifying maintenance and improving production efficiency, resulting in significant economic value. The ejector core-pulling assembly utilizes the ejector's own driving force to simultaneously eject and disengage the core-pulling structure, saving molding cycle time. The structure is safe, stable, and space-saving, allowing for space-saving water channel layout. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a prior art product in this invention;

[0023] Figure 2 This is a schematic diagram of the decorative ring product and the inverted structure of the decorative ring product of the present invention;

[0024] Figure 3 This is a schematic diagram of the fixed mold base structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the moving mold base structure of the present invention;

[0026] Figure 5 This is a front view schematic diagram of the contact structure between the moving mold base and the fixed mold base of the present invention;

[0027] Figure 6 For the present invention Figure 5 Side view sectional structural schematic diagram;

[0028] Figure 7 This is a schematic diagram of the locking buckle assembly of the present invention;

[0029] Figure 8 For the present invention Figure 7 A schematic diagram of the decomposed structure;

[0030] Figure 9 This is a structural schematic diagram of the decorative ring product and the ejector core-pulling assembly of the present invention;

[0031] Figure 10 This is a three-dimensional structural diagram of the ejector core-pulling assembly of the present invention;

[0032] Figure 11 For the present invention Figure 10 A schematic diagram of the decomposed structure;

[0033] Figure 12 For the present invention Figure 10 Schematic diagram of the cross-sectional structure in the middle;

[0034] Figure 13 For the present invention Figure 10 A schematic diagram of the structure applied in the moving mold base;

[0035] Figure 14 This is a schematic diagram of the structure of the decorative ring product, runner, and automatic gate shearing assembly of the present invention;

[0036] Figure 15 This is a three-dimensional structural schematic diagram of the automatic gate shearing component of the present invention;

[0037] Figure 16 For the present invention Figure 15 A partial sectional view of the structure;

[0038] Figure 17 For the present invention Figure 15 A partial sectional view of the structure;

[0039] Figure 18 For the present invention Figure 15 Schematic diagram of the structure used in fixed mold base and moving mold base;

[0040] Figure 19 For the present invention Figure 18 A schematic diagram of the three-dimensional front view structure in the image;

[0041] Figure 20 This is a schematic diagram of the structure of the insert of the present invention;

[0042] Figure 21 This is a schematic diagram of the disassembled insert of the present invention;

[0043] Figure 22 This is a schematic diagram of the conformal cooling water channel of the present invention;

[0044] Figure 23 This is a schematic diagram of the conformal cooling water channel of the present invention applied in an insert.

[0045] In the diagram: 1. Injection molding structure; 2. Fixed mold base; 3. Moving mold base; 4. Mold locking assembly; 5. Automatic gate shearing assembly; 6. Ejection and core pulling assembly; 7. Cavity; 8. Insert; 9. Base; 10. 3D printed insert; 11. Conformal cooling water channel; 12. Locking module; 14. Locking element; 15. Fixing threaded pin; 16. Pin; 17. Runner; 18. Pull-out; 19. Push-button; 20. Rocker arm; 21. Connecting guide block; 22. Cutting... 23. Knife; 24. Rocker arm guide block; 25. Rotating shaft; 26. First return spring; 27. Second return spring; 28. Ejector rod; 29. ​​Ejector block; 30. Cover plate; 31. Core pulling; 32. Square iron; 33. Lower ejector plate; 34. Upper ejector plate; 35. Ejector block fixing seat; 36. Core pulling guide block; 37. Ejector block guide rod; 38. Moving mold fixing plate; 39. Dovetail long block; 40. Dovetail groove; 41. Rocker arm limit block; 42. Decorative ring product. Detailed Implementation

[0046] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0047] Please see Figures 1 to 23This invention provides a technical solution: a decorative ring injection mold, including an injection structure 1, the injection structure 1 including a fixed mold base 2, the fixed mold base 2 having a cavity 7, a movable mold base 3 capable of vertical displacement below the fixed mold base 2, an insert 8 in the movable mold base 3, the insert 8 including a base 9, a 3D printed insert 10 connected to the base 9, a conformal cooling water channel 11 arranged along the interior of the 3D printed insert 10, one side of the 3D printed insert 10 being higher than the other side of the 3D printed insert 10, the inlet end of the conformal cooling water channel 11 being located at the bottom of the base 9, the conformal cooling water channel 11 being irregularly arranged along the internal shape of the 3D printed insert 10, the outlet end of the conformal cooling water channel 11 being located at the bottom of the base 9, and the height of the inlet side of the conformal cooling water channel 11 being lower than the height of the outlet side of the conformal cooling water channel 11;The 3D printed insert 10 is fastened to the base 9 by bolts. The insert 8 in the moving mold base 3 can mate with the cavity 7 in the fixed mold base 2, and a gap is left between the insert 8 and the cavity 7 to form the decorative ring product 41. The fixed mold base 2 is provided with a flow channel 17 that can communicate with the gap, and the molten liquid can be injected into the gap along the flow channel 17. The insert 8 can be used to cool the injection-molded decorative ring product 41. The outside of the moving mold base 3 is provided with a locking assembly 4 that can lock the contact between the fixed mold base 2 and the moving mold base 3. The locking assembly 4 includes a locking module 12, which is installed on the moving mold base. In step 3, the locking module 12 can contact the surface of the fixed mold base 2. The locking module 12 is provided with a locking member 14 that can be inserted into the fixed mold base 2 and lock the fixed mold base 2. The locking module 12 can be embedded in the moving mold base 3. The locking member 14 includes a fixing threaded pin 15, which is threadedly installed in the locking module 12. The fixing threaded pin 15 is provided with a pin 16 that can be inserted into the locking module 12. The fixed mold base 2 and the moving mold base 3 are provided with an automatic gate shearing assembly 5 that can automatically shear the gate in the runner 17 when the fixed mold base 2 and the moving mold base 3 are opened. The automatic shearing assembly 5 includes a pull buckle 18, which is installed in the moving mold base 3. A shovel 19 is provided in the fixed mold base 2, and the pull buckle 18 can drive the shovel 19 to move during mold opening operations. A swing arm 20 is provided in the fixed mold base 2, which can contact the shovel 19, and the shovel 19 can drive the swing arm 20 to rotate during movement. A connecting guide block 21 connected to the swing arm 20 and capable of vertical displacement along the interior of the fixed mold base 2 is provided in the fixed mold base 2. A cutter 22 connected to the connecting guide block 21 and capable of automatically shearing the gate in the runner 17 is provided in the fixed mold base 2. The pull buckle 18 is installed in the moving mold base 3 by bolts. The shovel 19 is provided with a first return spring 25 that is connected to the interior of the fixed mold base 2 and has elastic return. The fixed mold base 2 is provided with a swing rod guide block 23 for limiting and guiding the swing rod 20. The swing rod 20 is installed in the swing rod guide block 23 through the rotating shaft 24. The swing rod guide block 23 is provided with a swing rod limiting block 40 that can be inserted into the fixed mold base 2. The connecting guide block 21 is provided with a second return spring 26 that is connected to the interior of the fixed mold base 2 and has elastic return. The cutter 22 is installed at the bottom end of the connecting guide block 21 by bolts.The automatic gate shearing assembly 5 is symmetrically arranged on both sides of the moving mold base 3. The moving mold base 3 is equipped with an ejector core-pulling assembly 6 that can cooperate with the insert 8 and eject the decorative ring product 41 injection-molded between the cavity 7 and the insert 8, and can perform a de-clamping action. The ejector core-pulling assembly 6 includes multiple ejector rods 27, which are located in the moving mold base 3 and can move. The insert 8 is equipped with an ejector block 28 that is adapted to the insert 8. The surface of the ejector block 28 is equipped with a cover plate 29 that can be used to assist in the formation of the decorative ring product 41. Core pullers 30 are arranged sequentially in the ejector block 28. The ejector rods 27 can drive the ejector block 28 to eject the decorative ring product 41. During the movement of the ejector block 28, the core pullers 30 move and realize the de-clamping action. The lower part of the moving mold base 3 is equipped with a... The square iron 31, which contacts the moving mold base 3, has a lower ejector plate 32. Above the lower ejector plate 32 is an upper ejector plate 33. The upper ejector plate 33 has an ejector block fixing seat 34 connected to the ejector rod 27. The lower ejector plate 32 has a locking bolt that can be inserted into the upper ejector plate 33 and can limit and lock the ejector rod 27. The insert 8 has a core-pulling guide block 35, and the core-pulling 30 can move along the surface of the core-pulling guide block 35. The moving mold base 3 has an ejector block guide rod 36 that can be loosely fitted with the ejector rod 27. Below the square iron 31 is a moving mold fixing plate 37 connected to the square iron 31. A dovetail block 38 is provided at the top of the core-pulling guide block 35, and the core-pulling 30 has a dovetail groove 39 that matches the dovetail block 38.

[0048] Please see Figures 1 to 23 The present invention provides a technical solution: an injection molding method for the aforementioned decorative ring injection mold, the injection molding method comprising:

[0049] Step 1: During injection molding, the moving mold base 3 can be moved by the injection molding machine, so that the moving mold base 3 and the fixed mold base 2 are tightly attached. Then, the fixing threaded pin 15 can be inserted into the locking module 12, and the pin 16 can be inserted into the fixing threaded pin 15, thereby locking the fixed mold base 2 and the moving mold base 3, which facilitates the injection molding operation of the decorative ring product 41.

[0050] Step 2: After the molten liquid is injected into the gap between the cavity 7 and the insert 8 along the flow channel 17, cooling water can be injected into the conformal cooling water channel 11 in the insert 8, thereby accelerating the solidification of the molten liquid and making the product cool evenly until the decorative ring product 41 is formed. Step 3: After the decorative ring product 41 is formed, the pin 16, the fixed threaded pin 15 and the locking module 12 from Step 1 need to be removed in sequence. Then, the moving mold base 3 and the fixed mold base 2 can be opened. During the mold opening operation, the pull buckle 18 can drive the shovel 19 to move. At the same time, the first return spring 25 is compressed. When the shovel 19 moves, it drives the swing rod 20 to rotate around the rotating shaft 24. During the rotation, the swing rod 20 drives the connecting guide block 21 and the cutter 22 to move. At the same time, the second return spring 26 is compressed. The cutter 22 squeezes the runner 17 and cuts off the gate. At this time, the pull buckle 18 just completes the drive of the shovel 19. The mold opening action is completed. After the pull buckle 18 is completely released from the drive, the first return spring 25 and the second return spring 26 are reset, so that the above-mentioned components are reset. Step 4: After the gate is cut, the fixed mold base 2 and the moving mold base 3 separate. At this time, the lower ejector plate 32 can be driven to move, so that the ejector rod 27 can drive the ejector block 28 to move, thereby ejecting the product. At the same time as ejection, the core puller 30 moves along the surface of the core puller guide block 35, so that the core puller 30 moves inward during the ejection movement with the ejector block 28, thereby realizing the unhooking action.

[0051] In the description of this specification, the terms "connection", "installation", "fixing", "setting", etc. are interpreted broadly. For example, "connection" can be a fixed connection or an indirect connection through an intermediate component without affecting the relationship between components and the technical effect. It can also be an integral connection or a partial connection. In such cases, those skilled in the art can understand the specific meaning of the above terms in this invention or invention according to the specific circumstances.

[0052] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A decorative ring injection mold, comprising an injection molding structure (1), characterized in that: The injection molding structure (1) includes a fixed mold base (2), which has a cavity (7). A movable mold base (3) capable of vertical displacement is provided below the fixed mold base (2). An insert (8) is provided in the movable mold base (3). The insert (8) in the movable mold base (3) can cooperate with the cavity (7) in the fixed mold base (2), and a gap is left between the insert (8) and the cavity (7) to form a decorative ring product (41). The fixed mold base (2) has a flow channel (17) that can communicate with the gap, and the molten liquid can be injected into the gap along the flow channel (17). The insert (8) can be used for injection molding. The decorative ring product (41) is cooled. The outside of the moving mold base (3) is provided with a locking mold buckle assembly (4) that can lock the contact between the fixed mold base (2) and the moving mold base (3). The fixed mold base (2) and the moving mold base (3) are provided with an automatic gate shearing assembly (5) that can automatically shear the gate in the runner (17) when the fixed mold base (2) and the moving mold base (3) are opened. The moving mold base (3) is provided with an ejection core pulling assembly (6) that can cooperate with the insert (8) and eject the decorative ring product (41) injection molded between the cavity (7) and the insert (8) and can perform a buckle release action. The automatic gate shearing assembly (5) includes a pull buckle (18), which is installed in the moving mold base (3). The fixed mold base (2) is provided with a shovel (19), and the pull buckle (18) can drive the shovel (19) to move when the mold opening operation is performed. The fixed mold base (2) is provided with a swing arm (20) that can contact the shovel (19), and the shovel (19) can drive the swing arm (20) to rotate at an angle during the movement. The fixed mold base (2) is provided with a connecting guide block (21) that is connected to the swing arm (20) and can move up and down along the interior of the fixed mold base (2). The fixed mold base (2) is provided with a cutter (22) that is connected to the connecting guide block (21) and can automatically shear the gate in the runner (17). The pull buckle (18) is installed in the moving mold base (3) by bolts. The shovel (19) is provided with a first return spring (25) that is connected to the interior of the fixed mold base (2) and has elastic return. The fixed mold base (2) is provided with a swing rod guide block (23) for limiting and guiding the swing rod (20). The swing rod (20) is installed in the swing rod guide block (23) through a rotating shaft (24). The swing rod guide block (23) is provided with a swing rod limiting block (40) that can be inserted into the fixed mold base (2). The connecting guide block (21) is provided with a second return spring (26) that is connected to the interior of the fixed mold base (2) and has elastic return. The cutter (22) is installed at the bottom end of the connecting guide block (21) by bolts. The automatic gate shearing assembly (5) is symmetrically arranged on both sides of the moving mold base (3).

2. The injection mold for the decorative ring according to claim 1, characterized in that: The insert (8) includes a base (9), on which a 3D printed insert (10) is provided connected to the base (9), and the 3D printed insert (10) has a conformal cooling water channel (11) arranged along the interior of the 3D printed insert (10).

3. The injection mold for the decorative ring according to claim 2, characterized in that: The height of one side of the 3D printed insert (10) is higher than the height of the other side of the 3D printed insert (10). The water inlet of the conformal cooling water channel (11) is located at the bottom of the base (9). The conformal cooling water channel (11) is irregularly arranged along the internal shape of the 3D printed insert (10). The water outlet of the conformal cooling water channel (11) is located at the bottom of the base (9). The height of the water inlet side of the conformal cooling water channel (11) is lower than the height of the water outlet side of the conformal cooling water channel (11). The 3D printed insert (10) is fastened to the base (9) by bolts.

4. The injection mold for the decorative ring according to claim 1, characterized in that: The locking mold assembly (4) includes a locking module (12), which is installed in the moving mold base (3) and can contact the surface of the fixed mold base (2). The locking module (12) is provided with a locking member (14) that can be inserted into the fixed mold base (2) and lock the fixed mold base (2).

5. The injection mold for the decorative ring according to claim 4, characterized in that: The locking module (12) can be embedded in the moving mold base (3). The locking member (14) includes a fixed threaded pin (15), which is threadedly installed in the locking module (12). The fixed threaded pin (15) is provided with a pin (16) that can be inserted into the locking module (12).

6. The injection mold for the decorative ring according to claim 1, characterized in that: The ejector core-pulling assembly (6) includes multiple ejector rods (27). The ejector rods (27) are located in the moving mold base (3) and can move. The insert (8) is provided with an ejector block (28) that is compatible with the insert (8). The surface of the ejector block (28) is provided with a cover plate (29) that can be used to assist in forming the decorative ring product (41). The ejector block (28) is provided with core-pulling devices (30) in sequence. The ejector rods (27) can drive the ejector block (28) to eject the decorative ring product (41). During the movement of the ejector block (28), the core-pulling device (30) moves and realizes the unhooking action.

7. The injection mold for the decorative ring according to claim 6, characterized in that: Below the moving mold base (3) is a square iron (31) that can contact the moving mold base (3). A lower ejector plate (32) is provided in the square iron (31). An upper ejector plate (33) is provided above the lower ejector plate (32). A top block fixing seat (34) connected to the ejector rod (27) is provided in the upper ejector plate (33). A locking bolt that can be inserted into the upper ejector plate (33) and can limit and lock the ejector rod (27) is provided in the lower ejector plate (32). The insert (8) is provided with The core-pulling guide block (35) is provided, and the core-pulling (30) can be displaced along the surface of the core-pulling guide block (35). The moving mold base (3) is provided with a top block guide rod (36) that can be loosely fitted with the top rod (27). The square iron (31) is provided with a moving mold fixing plate (37) that can be connected to the square iron (31) below it. The top of the core-pulling guide block (35) is provided with a dovetail block (38), and the core-pulling (30) is provided with a dovetail groove (39) that is adapted to the dovetail block (38).

8. The injection molding method for the decorative ring injection mold according to claim 1, characterized in that: The injection molding method includes: Step 1: During injection molding, the moving mold base (3) can be moved by the injection molding machine, so that the moving mold base (3) and the fixed mold base (2) are in close contact. Then, the fixing threaded pin (15) can be inserted into the locking module (12), and the pin (16) can be inserted into the fixing threaded pin (15), so that the fixed mold base (2) and the moving mold base (3) can be locked, which facilitates the injection molding operation of the decorative ring product (41). Step 2: After the molten liquid is injected into the gap between the cavity (7) and the insert (8) along the flow channel (17), cooling water can be injected into the conformal cooling water channel (11) in the insert (8) to accelerate the solidification of the molten liquid and make the product cool evenly until the decorative ring product (41) is formed. Step 3: After the decorative ring product (41) is formed, the pin (16), the fixed threaded pin (15), and the locking module (12) from Step 1 need to be removed in sequence. Then, the moving mold base (3) and the fixed mold base (2) can be opened. During the mold opening operation, the pull buckle (18) can drive the shovel (19) to move, and at the same time, the first return spring (25) will be compressed. When the shovel (19) moves, it drives the swing arm (20) to rotate around the rotating shaft (24). (20) During the rotation, the drive connecting guide block (21) and cutter (22) move, and at the same time, the second return spring (26) is compressed. The cutter (22) will squeeze the runner (17) and cut off the gate. At this time, the pull buckle (18) just completes the drive of the shovel (19). The mold opening action is completed. After the pull buckle (18) is completely released from the drive, the first return spring (25) and the second return spring (26) reset, thereby resetting the above components. Step 4: After the gate is cut, the fixed mold base (2) and the moving mold base (3) are separated. At this time, the lower ejector plate (32) can be driven to move, so that the ejector rod (27) can drive the ejector block (28) to move, thereby ejecting the product. At the same time as ejection, the core puller (30) moves along the surface of the core puller guide block (35), so that the core puller (30) moves inward during the ejection movement with the ejector block (28), thereby realizing the unhooking action.

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