Decorative ring injection mold and injection molding method thereof

Abstract

The invention relates to the technical field of injection molds, in particular to a decorative ring injection mold and an injection molding method thereof.The decorative ring injection mold comprises an injection molding structure, the injection molding structure comprises a fixed mold base, a cavity is formed in the fixed mold base, a movable mold base capable of moving up and down is arranged below the fixed mold base, and an insert is arranged in the movable mold base; the mold insert in the movable mold base can be matched with the mold cavity in the fixed mold base, a gap capable of forming a decorative ring product is reserved between the mold insert and the mold cavity, a runner capable of being communicated with the gap is formed in the fixed mold base, molten liquid can be injected into the gap along the runner, and the mold insert can be used for cooling the decorative ring product subjected to injection molding. A mold locking buckle assembly capable of locking the collision of the fixed mold base and the movable mold base is arranged outside the movable mold base, and an automatic sprue shearing assembly capable of automatically shearing a sprue in the runner when the fixed mold base and the movable mold base are subjected to mold opening operation is arranged in the fixed mold base and the movable mold base.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, in particular to a decorative ring injection mold and an injection molding method thereof. Background Art

[0002] The decorative frame is an important part of the car lamp. Due to its special position and purpose in the lamp, the decorative frame is exposed, and the product surface has leather grain, high gloss, and electroplating requirements, and the appearance is very high. At the same time, the product is installed on the lens, and its exterior is used for shielding and decoration. Under the strong light of the lens, the appearance defects of the product are more obvious. The product is usually small, but has more structures. In a compact space, it is necessary to solve the problem of structural demoulding, and at the same time, to ensure the appearance of the product, which adds great difficulty to the mold development. Its appearance and use are indispensable parts of the lamp.

[0003] Moreover, the product has a small space, and the structure on the product is prone to uneven cooling, force marks and color difference. During the design process, it is necessary to focus on making the mold action structure smaller to reduce the color difference caused by uneven cooling due to the structure. It is also necessary to fully consider the cooling of the thin steel position of the product to avoid color difference on the product appearance due to heat accumulation in the thin steel.

[0004] After the product is injection molded, the gate needs to be trimmed, but most trimming methods require a lot of labor cost to trim after the product is taken out, and it is easy to reduce the qualified rate of the product. Therefore, a decorative ring injection mold and an injection molding method thereof are proposed. Summary of the invention

[0005] 1. Technical issues to be resolved In view of the deficiencies in the prior art, the present invention provides a decorative ring injection mold and an injection molding method thereof, which solve the problems raised in the above-mentioned background technology.

[0006] (II) Technical solution To achieve the above object, the present invention is implemented by the following technical scheme: a decorative ring injection mold, comprising an injection structure, the injection structure comprising a fixed mold seat, a cavity is provided in the fixed mold seat, a movable mold seat capable of upward and downward displacement is provided below the fixed mold seat, an insert is provided in the movable mold seat, the insert in the movable mold seat can cooperate with the cavity in the fixed mold seat, and a gap capable of forming a decorative ring product is left between the insert and the cavity, a flow channel capable of communicating with the gap is provided in the fixed mold seat, and the molten liquid can be injected into the mold along the flow channel In the gap, the insert can be used to cool the injection-molded decorative ring product, the outside of the movable mold seat is provided with a locking buckle assembly that can lock the interference between the fixed mold seat and the movable mold seat, the fixed mold seat and the movable mold seat are provided with a gate automatic shearing assembly that can automatically shear the gate in the runner when the fixed mold seat and the movable mold seat perform a mold opening operation, and the movable mold seat is provided with an ejection 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 back-off action.

[0007] Furthermore, the insert includes a base, on which is disposed a 3D printed insert connected to the base, and in which the 3D printed insert is disposed a conformal cooling water channel arranged along the interior of the 3D printed insert.

[0008] Furthermore, the height of one side of the 3D printed insert is higher than the height of the other side of the 3D printed insert, the water inlet end 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 water outlet end of the conformal cooling water channel is located at the bottom of the base, and the water inlet side height of the conformal cooling water channel is lower than the water outlet side height of the conformal cooling water channel; the 3D printed insert is fastened to the base by bolts. The 3D grafting printing principle of the 3D printed insert in this scheme: The principle of 3D printing technology is to use a high-energy laser beam to sinter the metal powder material in a selected area, and stack it layer by layer to achieve a shape that is relatively close to the CAD drawing, and the grafting printing is to stack and print only the part that needs to be printed on the premise of selecting the base, and then heat treat and temper the whole to relieve stress, and combine it with our ordinary machining to remove the excess steel material to complete the final part molding. As shown in the figure, the insert is divided into two parts (base + 3D printing). The base is completed by ordinary machining, and then 3D printing is used to graft the layer-by-layer stacking principle to form an integral insert. This can solve the problem of difficult cooling of the two circles of the raised sharp corners, and the cooling water channel is conformed to the shape, and the product is cooled evenly, thereby ensuring the product appearance, reducing the molding cycle, and improving production efficiency. In addition, the base is purchased and processed in general, and the required parts are 3D printed, which can reduce costs.

[0009] Furthermore, the locking buckle assembly includes a locking module, which is installed in the movable mold seat and can contact the surface of the fixed mold seat. The locking module is provided with a locking member that can be inserted into the fixed mold seat and lock the fixed mold seat. To release the locking buckle: manually pull out the latch, take out the locking module, rotate it 180°, put it on the corresponding hole on the fixed mold side, and then insert the latch on the fixed threaded pin. The mold locking buckle is opened and the mold can be opened; to close the action: manually pull out the latch, take out the locking module, rotate it 180°, put it on the locking buckle hole for the movable and fixed molds, and then insert the latch on the fixed threaded pin. The locking buckle is combined, and the mold can be lifted and transported.

[0010] Furthermore, the locking module can be embedded in the movable mold base, and the locking member includes a fixed threaded pin, which is threadedly installed in the locking module, and the fixed threaded pin is provided with a pin that can be inserted into the locking module.

[0011] Furthermore, the automatic gate shearing assembly includes a buckle, which is installed in the movable mold seat, a shovel is provided in the fixed mold seat and the buckle can drive the shovel to move during the mold opening operation, a swing arm that can contact the shovel is provided in the fixed mold seat and the shovel can drive the swing arm to rotate in an angle during the movement, a connecting guide block connected to the swing arm and capable of moving up and down along the inside of the fixed mold seat is provided in the fixed mold seat, and a cutter that can be connected to the connecting guide block and can automatically shear the gate in the runner is provided in the fixed mold seat. The working principle of mold opening shearing: the mold is opened, the buckle is fixed on the movable mold seat, the buckle drives the shovel to move (compressing the spring at the same time), the movement of the shovel drives the swing arm to rotate around the rotating shaft, the swing arm drives the connecting guide block and the cutter to move (compressing the spring at the same time), the cutter squeezes the runner to cut off the gate, and at this time the buckle just completes the drive of the shovel, the mold opening action is completed, and the spring and the spring are squeezed in the previous action. After the buckle is completely released from the drive, the spring force will quickly restore the entire device.

[0012] Furthermore, the buckle is installed in the movable mold seat by bolts, the shovel is provided with a first return spring which is connected to the inside of the fixed mold seat and has elastic return, the fixed mold seat is provided with a rocker guide block for limiting and guiding the rocker, the rocker is installed in the rocker guide block through a rotating shaft, the rocker guide block is provided with a rocker limit block which can be inserted into the fixed mold seat, the connecting guide block is provided with a second return spring which can be connected to the inside of the fixed mold seat and has elastic return, the cutter is installed at the bottom end of the connecting guide block by bolts; the gate automatic shearing assembly is symmetrically arranged at both sides of the movable mold seat.

[0013] Furthermore, the ejection core-pulling assembly includes a plurality of ejector pins, which are arranged in the movable mold seat and can move. The insert is provided with an ejector block that matches the insert. The surface of the ejector block is provided with a cover plate that can be used to assist in forming a decorative ring product. The ejector block is provided with core pulls in sequence. The ejector pin can drive the ejector block to eject the decorative ring product. During the movement of the ejector block, the core pull moves and realizes the undercut action. Ejection synchronous core-pulling action: The injection molding machine drives the lower ejector plate, which drives the ejector block to eject the product through the ejector pin, and the core pull is installed in the ejector block. At the same time of ejection, the core pull guide block is fixed in the movable mold seat and will not move with the ejection. However, the core pull guide block is connected to the core pull dovetail groove, which will allow the core pull to retract in the process of ejection with the ejector block to realize the undercut action.

[0014] Furthermore, a square iron capable of contacting the movable mold seat is provided below the movable mold seat, a lower ejector plate is provided in the square iron, an upper ejector plate is provided above the lower ejector plate, an ejector block fixing seat connected to the ejector rod is provided in the upper ejector plate, a locking bolt capable of being inserted into the upper ejector plate and capable of limiting and locking the ejector rod is provided in the lower ejector plate, a core pulling guide block is provided in the insert, the core pulling can be displaced along the surface of the core pulling guide block, an ejector block guide rod capable of being set in an empty sleeve with the ejector rod is provided in the movable mold seat, a movable mold fixing plate capable of being connected to the square iron is provided below the square iron; a dovetail long block is provided at the top position of the core pulling guide block, and a dovetail groove matching the dovetail long block is provided in the core pulling. Further, an injection molding method of a decorative ring injection mold, the injection molding method comprises: Step 1: During injection molding, the movable mold base can be driven to move by the injection molding machine, so that the movable mold base and the fixed mold base can be closely attached to each other. After that, the fixed threaded pin can be inserted into the locking module, and the pin can be inserted into the fixed threaded pin, so that the fixed mold base and the movable mold base can be locked, which is convenient for the injection molding operation of the decorative ring product; 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, thereby accelerating the solidification of the molten liquid and making the product cool evenly until a decorative ring product is formed; Step 3: After the decorative ring product is formed, the latch, fixed threaded pin and lock module in step 1 need to be removed in turn, and then the movable mold base and the fixed mold base can be opened. During the mold opening operation, the buckle can drive the shovel to move, and at the same time, the first return spring will be compressed. When the shovel moves, it drives the rocker arm to rotate around the rotating shaft. During the rotation, the rocker arm drives the connecting guide block and the cutter to move. The second return spring will be compressed, the cutter will squeeze the runner and cut off the gate. At this time, the buckle just completes the drive of the shovel machine, and the mold opening action is completed. After the buckle is completely released, the first return spring and the second return spring are reset, so that the above-mentioned components are reset; Step 4: After the gate is sheared, the fixed mold base and the movable mold base are separated. At this time, the lower ejector plate can be driven to move, so that the ejector rod can drive the ejector block to move, thereby ejecting the product, and at the same time of 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 of the ejector block, thereby realizing the undercut action.

[0015] The products in this solution not only need good appearance, but also need stable strength and high temperature resistance. Usually PC2407 high temperature material is selected. The material needs to be dried at 120° for 4-6h in advance, the molding temperature is 300-320°, and the mold temperature is 120°. The required molding conditions are relatively harsh. Usually, in order to reduce the cost, customers also give priority to 2.0mm wall thickness. The injection pressure is generally between 90-130MP. The injection speed should not be too fast. The filling speed is generally around 40mm / s, otherwise silver wire and gas marks are easily formed on the appearance of the product. Combining the above adjustments, the product is slowly molded at high pressure and high temperature; the size of this product is 179X204X117mm (Note: 117 is the height of the mold demolding direction), and the product material is PC2407 thermoplastic material). The characteristics of this material are shrinkage rate of 0.6%, the product has good light transmittance, good heat resistance, small product shrinkage, and high dimensional accuracy; Compared with the prior art, the decorative ring injection mold and the injection molding method thereof are convenient and easy to disassemble and assemble, simple to process, and do not require any tools through the arrangement of structures such as the mold locking buckle assembly, and the mold locking buckle is simple and convenient to operate, and can be quickly unlocked and closed without the use of any tools; through the arrangement of structures such as the automatic gate shearing assembly, the mold opening action and the principle of the accelerated movement of the swing arm structure are utilized to synchronously realize the automatic gate shearing, thereby saving the mold cycle, and also avoiding the problems of the gate shearing being unable to be sheared due to insufficient cylinder driving force, etc. The mechanical structure is safe, reliable and practical, and the position space required for the mold is also small, and it can be used in most environments. At the same time, the standardized structure only requires the mold to be replaced with a cutter, which is simple, convenient and fast for two-field maintenance, improves production efficiency and has great economic value; through the arrangement of structures such as the ejector core pulling assembly, the driving force of the ejector itself is utilized to eject while driving the core pulling structure to be unfastened, thereby saving the molding cycle, and at the same time, the structure is safe and stable, and the space is small, which can save space for arranging waterways. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the prior art product in the present invention; Figure 2 It is a schematic structural diagram of the decorative ring product and the inverted decorative ring product of the present invention; Figure 3 This is a schematic diagram of the fixed die base structure of the present invention; Figure 4 It is a schematic diagram of the structure of the movable mold base of the present invention; Figure 5 It is a front view structural schematic diagram of the movable mold base and the fixed mold base in contact with each other according to the present invention; Figure 6 For the present invention Figure 5 A schematic diagram of the cross-sectional structure from the side; Figure 7 It is a structural schematic diagram of the locking buckle assembly of the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of the decomposition structure; Fig. 9 It is a structural schematic diagram of the decorative ring product and the ejection core pulling assembly of the present invention; Fig.10 It is a three-dimensional structural schematic diagram of the ejector core pulling assembly of the present invention; Fig.11 For the present invention Fig.10 Schematic diagram of the decomposed structure; Fig.12 For the present invention Fig.10 Schematic diagram of the cross-sectional structure in; Fig.13 For the present invention Fig.10Schematic diagram of the structure applied in the movable mold base; Fig.14 It is a structural schematic diagram of the decorative ring product, runner and gate automatic shearing assembly of the present invention; Fig.15 It is a three-dimensional structural schematic diagram of the automatic gate shearing assembly of the present invention; Fig.16 For the present invention Fig.15 A partial cross-sectional structural schematic diagram of FIG. Fig.17 For the present invention Fig.15 A partial cross-sectional structural schematic diagram of FIG. Fig.18 For the present invention Fig.15 Schematic diagram of the structure used in the fixed mold base and the movable mold base; Fig.19 For the present invention Fig.18 A schematic diagram of a three-dimensional front view structure; Fig. 20 It is a structural schematic diagram of the insert of the present invention; Fig.21 It is a schematic diagram of the structure of the split insert of the present invention; Fig. 22 It is a structural schematic diagram of the conformal cooling water channel of the present invention; Fig.23 It is a schematic diagram of the structure of the conformal cooling water channel of the present invention applied in the insert.

[0017] In the figure: 1. Injection molding structure; 2. Fixed mold base; 3. Moving mold base; 4. Locking mold buckle assembly; 5. Gate automatic shearing assembly; 6. Ejection core pulling assembly; 7. Cavity; 8. Insert; 9. Base; 10. 3D printing insert; 11. Conformal cooling water channel; 12. Locking module; 13. Locking bolt; 14. Locking piece; 15. Fixed threaded pin; 16. Pin; 17. Runner; 18. Buckle; 19. Shovel; 20. Rocker; 21. Connecting guide block; 22. Cutter; 23. Rocker guide block; 24. Rotating shaft; 25. First return spring; 26. Second return spring; 27. Ejector rod; 28. Ejector block; 29. ​​Cover plate; 30. Core pulling; 31. Square iron; 32. Lower ejector plate; 33. Upper ejector plate; 34. Ejector block fixing seat; 35. Core pulling guide block; 36. Ejector block guide rod; 37. Moving mold fixing plate; 38. Dovetail length block; 39. Dovetail groove; 40. Rocker limit block; 41. Decorative ring product. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] See also Figures 1 to 23The present invention provides a technical solution: a decorative ring injection mold, comprising an injection structure 1, the injection structure 1 comprising a fixed mold base 2, a cavity 7 is provided in the fixed mold base 2, a movable mold base 3 capable of up and down displacement is provided below the fixed mold base 2, an insert 8 is provided in the movable mold base 3, the insert 8 comprises a base 9, a 3D printed insert 10 connected to the base 9 is provided on the base 9, a conformal cooling water channel 11 arranged along the inside of the 3D printed insert 10 is provided in the 3D printed insert 10, a height of one side of the 3D printed insert 10 is higher than a height of the other side of the 3D printed insert 10, a water inlet end 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, a water outlet end of the conformal cooling water channel 11 is located at the bottom of the base 9, and a water inlet side height of the conformal cooling water channel 11 is lower than a water outlet side height of the conformal cooling water channel 11;The 3D printing insert 10 is fastened to the base 9 by bolts, the insert 8 in the movable mold seat 3 can cooperate with the cavity 7 in the fixed mold seat 2, and a gap that can form a decorative ring product 41 is left between the insert 8 and the cavity 7, the fixed mold seat 2 is provided with a flow channel 17 that can be connected to 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, and the outside of the movable mold seat 3 is provided with a locking buckle assembly 4 that can lock the conflict between the fixed mold seat 2 and the movable mold seat 3, and the locking buckle assembly 4 includes a locking module 12, and the locking module 12 is installed on the movable mold seat 3 and the locking module 12 can contact the surface of the fixed mold seat 2, the locking module 12 is provided with a locking member 14 that can be inserted into the fixed mold seat 2 and lock the fixed mold seat 2, the locking module 12 can be embedded in the movable mold seat 3, the locking member 14 includes a fixed threaded pin 15, the fixed threaded pin 15 is threadedly installed in the locking module 12, the fixed threaded pin 15 is provided with a latch 16 that can be inserted into the locking module 12, the fixed mold seat 2 and the movable mold seat 3 are provided with a gate automatic shearing component 5 that can automatically shear the gate in the runner 17 when the fixed mold seat 2 and the movable mold seat 3 perform a mold opening operation, and the gate The automatic shearing assembly 5 includes a buckle 18, which is installed in the movable mold base 3. The fixed mold base 2 is provided with a shovel 19, and the 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 rod 20 that can contact the shovel 19, and the shovel 19 can drive the swing rod 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 rod 20 and can move up and down along the inside of the fixed mold base 2. The fixed mold base 2 is provided with a cutter 22 that can be connected to the connecting guide block 21 and can automatically shear the gate in the runner 17. The buckle 18 is installed in the movable die seat 3 by bolts, the shovel 19 is provided with a first return spring 25 connected to the inside of the fixed die seat 2 and elastically returning, the fixed die seat 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 limit block 40 that can be inserted into the fixed die seat 2, the connecting guide block 21 is provided with a second return spring 26 that can be connected to the inside of the fixed die seat 2 and elastically returning, and the cutter 22 is installed at the bottom end of the connecting guide block 21 by bolts;The gate automatic shearing assembly 5 is symmetrically arranged at the positions on both sides of the movable mold base 3. The movable mold base 3 is provided with an ejection core pulling assembly 6 that can cooperate with the insert 8 and can eject the decorative ring product 41 injection-molded between the cavity 7 and the insert 8 and can perform the undercut action. The ejection core pulling assembly 6 includes a plurality of ejector rods 27, and the ejector rods 27 are arranged in the movable mold base 3 and can move. The insert 8 is provided with an ejector block 28 that is adapted to 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 sequentially provided with core pulling 30. The ejector rod 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 30 moves and realizes the undercut action. The lower part of the movable mold base 3 is provided with an ejector rod 27 that can cooperate with the ejector block 28 to eject the decorative ring product 41. The square iron 31 in contact with the movable mold seat 3 has a lower ejector plate 32 in the square iron 31, an upper ejector plate 33 above the lower ejector plate 32, an ejector block fixing seat 34 connected to the ejector rod 27 in the upper ejector plate 33, a locking bolt 13 that can be inserted into the upper ejector plate 33 and can limit and lock the ejector rod 27 in the lower ejector plate 32, a core pulling guide block 35 in the insert 8, the core pulling 30 can move along the surface of the core pulling guide block 35, an ejector block guide rod 36 that can be set in an empty sleeve with the ejector rod 27 is provided in the movable mold seat 3, and a movable mold fixing plate 37 that can be connected to the square iron 31 is provided below the square iron 31; a dovetail long block 38 is provided at the top position of the core pulling guide block 35, and a dovetail groove 39 that matches the dovetail long block 38 is provided in the core pulling 30. ;

[0020] See also Figures 1 to 23 The present invention provides a technical solution: an injection molding method of the decorative ring injection mold, the injection molding method comprising: Step 1: During injection molding, the movable mold base 3 can be driven to move by the injection molding machine, so that the movable mold base 3 and the fixed mold base 2 can be closely attached to each other, and then the fixed threaded pin 15 can be inserted into the locking module 12, and the latch pin 16 can be inserted into the fixed threaded pin 15, so that the fixed mold base 2 and the movable mold base 3 can be locked, which is convenient for 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 runner 17, cooling water can be injected into the conformal cooling water channel 11 in the insert 8, so as 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 latch 16, the fixed threaded pin 15 and the lock module 12 in step 1 need to be removed in sequence, and then the movable mold base 3 and the fixed mold base 2 can be opened. During the mold opening operation, the 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 rocker 20 to rotate around the rotating shaft 24. During the rotation, the rocker 20 drives the connecting guide block 21 and the cutter 22 to move. At the same time, the second return spring 26 will be compressed, and the cutter 22 will squeeze the runner 17 and cut off the gate. At this time, the buckle 18 just completes the drive of the shovel 19, and the mold opening action is completed. After the buckle 18 is completely released, the first return spring 25 and the second return spring 26 are reset, thereby resetting the above-mentioned components; Step 4: After the gate is sheared, the fixed mold base 2 and the movable 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, and at the same time of 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 of the ejector block 28, thereby realizing the undercut action.

[0021] In the description of this specification, the terms "connect", "install", "fix", "set", etc. are understood in a broad sense. 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. As in this example, for ordinary technicians in this field, the specific meanings of the above terms in the present invention or invention can be understood according to the specific circumstances.

[0022] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope 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) comprises a fixed mold base (2), a mold cavity (7) is provided in the fixed mold base (2), a movable mold base (3) capable of upward and downward 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 mold cavity (7) in the fixed mold base (2), and a gap is left between the insert (8) and the mold cavity (7) to form a decorative ring product (41), a flow channel (17) is provided in the fixed mold base (2) to communicate with the gap, and molten liquid can be injected into the gap along the flow channel (17), and the insert (8) can be used for injection molding. The decorative ring product (41) is subjected to cooling treatment, the movable mold base (3) is provided with a locking mold buckle assembly (4) on the outside thereof which can lock the interference between the fixed mold base (2) and the movable mold base (3), the fixed mold base (2) and the movable mold base (3) are provided with a gate automatic shearing assembly (5) which can automatically shear the gate in the runner (17) when the fixed mold base (2) and the movable mold base (3) are subjected to mold opening operation, and the movable mold base (3) is provided with an ejection core pulling assembly (6) which can cooperate with the insert (8) and can eject the decorative ring product (41) injection molded between the cavity (7) and the insert (8) and can perform a buckle-off action.

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

3. The bezel ring injection mold according to claim 2, characterized in that: The height of one side of the 3D printing insert (10) is higher than the height of the other side of the 3D printing insert (10); the water inlet end 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 printing insert (10); the water outlet end of the conformal cooling water channel (11) is located at the bottom of the base (9); the water inlet side height of the conformal cooling water channel (11) is lower than the water outlet side height of the conformal cooling water channel (11); and the 3D printing insert (10) is fastened to the base (9) by bolts.

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

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

6. The bezel ring injection mold according to claim 1, characterized in that: The automatic gate cutting component (5) comprises a buckle (18), wherein the buckle (18) is installed in the movable mold base (3); a shovel (19) is provided in the fixed mold base (2), and the buckle (18) can drive the shovel (19) to move when performing a mold opening operation; a swing rod (20) is provided in the fixed mold base (2) and can contact the shovel (19), and the shovel (19) can drive the swing rod (20) to rotate at an angle during movement; a connecting guide block (21) is provided in the fixed mold base (2) and is connected to the swing rod (20) and can move up and down along the inside of the fixed mold base (2); and a cutter (22) is provided in the fixed mold base (2) and can be connected to the connecting guide block (21) and can automatically cut the gate in the runner (17).

7. The bezel ring injection mold according to claim 6, characterized in that: The buckle (18) is installed in the movable mold seat (3) by bolts, the shovel (19) is provided with a first return spring (25) which is connected to the inside of the fixed mold seat (2) and has elastic return, the fixed mold seat (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 limit block (40) which can be inserted into the fixed mold seat (2), the connecting guide block (21) is provided with a second return spring (26) which can be connected to the inside of the fixed mold seat (2) and has elastic return, and the cutter (22) is installed at the bottom end of the connecting guide block (21) by bolts; the gate automatic shearing assembly (5) is symmetrically arranged at the two sides of the movable mold seat (3).

8. The bezel ring injection mold according to claim 1, characterized in that: The ejection core pulling assembly (6) comprises a plurality of ejector rods (27), wherein the ejector rods (27) are arranged in the movable mold base (3) and are movable, wherein the insert (8) is provided with an ejector block (28) adapted to the insert (8), wherein the surface of the ejector block (28) is provided with a cover plate (29) which can be used to assist in forming a decorative ring product (41), wherein core pulling devices (30) are arranged in sequence in the ejector block (28), wherein the ejector rods (27) can drive the ejector block (28) to eject the decorative ring product (41), and wherein the core pulling devices (30) move during the movement of the ejector block (28) and realize a buckle-off action.

9. The bezel ring injection mold according to claim 8, characterized in that: A square iron (31) capable of contacting the movable mold base (3) is provided below the movable 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); an ejector block fixing seat (34) connected to the ejector rod (27) is provided in the upper ejector plate (33); a locking bolt (13) capable of being inserted into the upper ejector plate (33) and capable of limiting and locking the ejector rod (27) is provided in the lower ejector plate (32); A 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); a top block guide rod (36) that can be set in an empty sleeve with the top rod (27) is provided in the movable mold seat (3); a movable mold fixing plate (37) that can be connected to the square iron (31) is provided below the square iron (31); a dovetail long block (38) is provided at the top position of the core pulling guide block (35), and a dovetail groove (39) that is compatible with the dovetail long block (38) is provided in the core pulling (30).

10. The method for molding a bezel ring injection mold according to claim 1, characterized in that: The injection molding method comprises: Step 1: During injection molding, the movable mold base (3) can be driven to move by the injection molding machine, so that the movable mold base (3) and the fixed mold base (2) can be closely attached to each other. After that, the fixed threaded pin (15) can be inserted into the locking module (12), and the latch pin (16) can be inserted into the fixed threaded pin (15), so that the fixed mold base (2) and the movable mold base (3) can be locked, which is convenient for the injection molding operation of the decorative ring product (41); Step 2: After the molten liquid is injected into the gap between the mold 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 a decorative ring product (41) is formed; Step 3: After the decorative ring product (41) is formed, the latch (16), the fixed threaded pin (15) and the lock module (12) in step 1 need to be removed in sequence, and then the movable mold base (3) and the fixed mold base (2) can be opened. During the mold opening operation, the buckle (18) can drive the shovel (19) to move, and at the same time, the first return spring (25) is compressed. When the shovel (19) moves, it drives the rocker (20) to rotate around the rotating shaft (24). (20) During the rotation process, the connecting guide block (21) and the cutter (22) are driven to move, and at the same time, the second return spring (26) is compressed, and the cutter (22) squeezes the runner (17) and can cut off the gate. At this time, the buckle (18) just completes the driving of the shovel machine (19), and the mold opening action is completed. After the buckle (18) is completely released from the driving, the first return spring (25) and the second return spring (26) are reset, thereby resetting the above-mentioned components; Step 4: After the gate is sheared, the fixed mold base (2) and the movable 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 of 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 of the ejector block (28), thereby realizing the undercut action.

Images