Air intake grille injection mold and surface traceless repairing method thereof

Abstract

The application relates to the field of injection molding processing, and in particular to an air inlet grille injection mold and a surface traceless repairing method thereof, an air inlet grille injection mold surface traceless repairing method, which comprises the following steps of S1: processing a hole groove at a damaged position of a movable module, and processing a chamfer on the bottom surface of the hole groove; S2: processing an insert column, and processing a chamfer on the bottom of the insert column; S3: cleaning burrs of the insert column and the movable module; S4: heating the movable module, so that the inner diameter size of the hole groove of the movable module is increased; S5: cold storing the insert column, so that the outer diameter size of the insert column is reduced; S6: knocking the insert column into the hole groove of the movable module, so that the insert column completely fills the hole of the movable module; S7: waiting for the insert column and the movable module to be cooled to room temperature; S8: milling the part of the insert column, which is stretched out of the hole groove of the movable module, to the same plane; and S9: polishing the insert column and the movable module at the position close to the insert column. The application has the effect that the damaged position repairing of the injection mold is completed without welding, and the insert joint line generated in the damaged position repairing is reduced.

Description

Technical Field

[0001] This application relates to the field of injection molding, and in particular to an air intake grille injection mold and a method for repairing its surface without leaving marks. Background Technology

[0002] The car's grille is a crucial assembly component, serving to protect the vehicle's structure, provide ventilation, and facilitate air intake and heat dissipation. Grilles are primarily made of resin materials such as ABS or plastic materials, and are typically manufactured using injection molding. Due to ventilation and design requirements, the number of air vents in the grille may vary between different production batches for the same car model. During the injection molding process, the outer surface of the injection mold often suffers damage over time. This damage affects the quality of the finished grille, resulting in more burrs or dimensional discrepancies. Furthermore, damage can affect the stress distribution within the injection mold, potentially causing further damage. Therefore, damaged injection molds require timely repair or replacement.

[0003] Existing methods for repairing air intake grille injection molds mainly fall into two categories. The first is welding, which has the advantage of a simple operation and superior mold strength after welding. The second method involves filling the damaged area of ​​the injection mold with inserts through interference fit, thereby repairing the mold. The main advantage of this method is its lower cost.

[0004] Regarding the existing injection mold repair methods, the inventors discovered that these methods all have significant drawbacks. Welding, for example, causes weld spots on the mold surface, and welding at weak points or stress concentration areas can lead to mold material cracking, rendering the entire mold unusable and resulting in substantial economic losses. The commonly used interference fit plugging method requires large machinery to press the insert in, which can easily damage the injection mold. Furthermore, the fit between the insert and the hole at the repair location is likely to create visible splice lines, affecting the quality of the air intake grille obtained from the injection molding process. Summary of the Invention

[0005] In order to repair damaged parts of injection molds without welding and reduce splicing lines caused by repairing damaged parts, this application provides an air intake grille injection mold and a method for repairing its surface without leaving marks.

[0006] This application provides a method for seamless repair of the surface of an air intake grille injection mold, which employs the following technical solution:

[0007] A method for repairing the surface of an air intake grille injection mold without leaving marks includes,

[0008] S1: Machining a hole or groove at the location of the damaged moving module, and chamfering the bottom surface of the hole or groove;

[0009] S2: Machining the insert, the insert and the hole groove of the moving module have the same surface finish, the length of the insert is greater than the depth of the hole of the moving module, and the bottom of the insert is chamfered;

[0010] S3: Clean the burrs around and at the bottom of the slots of the insert and moving module;

[0011] S4: Heat the moving module to a temperature range of 150 to 250 degrees Celsius to increase the inner diameter of the slots in the moving module.

[0012] S5: Refrigerate the inlay at a temperature of -150°C to -200°C to reduce the outer diameter of the inlay.

[0013] S6: Tap the insert into the slot of the moving module so that the insert completely fills the hole of the moving module;

[0014] S7: Wait for the insert and moving module to cool to room temperature;

[0015] S8: Mill the part of the insert protruding from the slot of the moving module to the surface position of the moving module, tap the insert to make the insert fit more tightly with the slot position of the moving module, and mill the insert and the surface of the moving module to the same plane.

[0016] S9: Polish the inlay and the area of ​​the moving module near the inlay.

[0017] By adopting the above technical solution, during use, the user reduces the outer diameter of the insert by cooling it down, while simultaneously heating the moving module to increase the diameter of the slots within it. This allows the insert to more easily fill the slots in the moving module. Once both return to room temperature, the insert expands due to the increased temperature, while the diameter of the slots in the moving module decreases due to the decreased temperature, resulting in a tighter fit between the insert and the slots and smaller gaps in the joint. After both have cooled and stabilized, the joint area is milled to the same horizontal plane, followed by surface polishing. This allows the insert to repair damaged areas of the moving module, reducing the number of joint lines generated during repair.

[0018] Optionally, the specific operation of S1 further includes: machining a through hole at the location of the slot processed in the moving module, so that the through hole is connected to the slot of the moving module.

[0019] By adopting the above technical solution, when the user uses the device, a through hole is machined in the moving module so that the through hole is connected to the slot of the moving module. The through hole is used to discharge the air in the slot of the moving module, thereby reducing the air resistance encountered by the insert when it is filled into the slot of the moving module.

[0020] Optionally, the specific operation of S2 further includes: using the same material as the moving module to process and form an insert, and processing one end of the insert into the hole groove of the moving module with a taper of 1°-3°.

[0021] By adopting the above technical solution, when users use the same material to process the insert, the moving module and the insert can produce the same amount of expansion and contraction, thereby further ensuring the fit between the slot of the moving module and the insert. The bottom of the insert is processed with a certain taper, which can play a role in supporting and stabilizing the stability of the insert in the slot of the moving module.

[0022] The technical solution for the air intake grille injection mold provided in this application is as follows:

[0023] An air intake grille injection mold, applicable to the aforementioned method for non-marking repair of the surface of an air intake grille injection mold, comprising,

[0024] The mold body has a cavity and is provided with a glue injection port.

[0025] The mold body has several glue outlets, which are located in the cavity of the mold body.

[0026] The flow channel is located within the mold body, and the injection port and several outlet ports of the mold body are interconnected through the flow channel of the mold body.

[0027] The front mold is detachably connected to the cavity of the mold body;

[0028] A template is detachably connected to the mold body, and the template can cover the cavity of the mold body;

[0029] The moving module is provided in several parts, and each moving module is movably connected to the front mold. The moving module can abut against the template, and a forming flow channel is formed between any two adjacent moving modules.

[0030] Injection heads are located at each outlet of the mold body, and each outlet is connected to the molding flow channel formed by the adjacent moving parts through the injection head.

[0031] By adopting the above technical solution, when the user uses the material, the fluid injection molding material enters the mold's runner through the injection port and then enters each injection head through multiple outlets. After that, each injection head enters the molding runner formed by adjacent moving modules, filling the gap between the mold plate and the front mold along the molding runner. By adding plastic into the mold simultaneously through multiple injection heads, the various parts of the car's air intake grille flow evenly, thereby reducing the uneven distribution of internal stress in the air intake grille caused by uneven cooling and improving the molding quality of the air intake grille.

[0032] Optionally, the front mold has a moving mold groove at each position of the moving module, and each moving module is slidably disposed in the corresponding moving mold groove of the front mold. The moving module can cover the moving mold groove of the front mold. Each moving module is connected to a drive screw, and each drive screw is threadedly connected to the front mold. The drive screw can drive the moving module to slide along the depth direction of the moving mold groove in the front mold.

[0033] By adopting the above technical solution, when the user uses the device, rotating the drive screw can drive the corresponding moving module to slide towards the template in the moving mold groove of the front mold, so that the moving module abuts against the template. At this time, there is no gap between the moving module and the template. The injection material enters the front mold, the template and multiple moving modules to form the car's air intake grille. During this process, the injection material cannot flow into the space between the moving module and the template, so a through air intake channel will be formed. The user can adjust the number and position of the air intake channels opened on the air intake grille formed in the injection mold according to the car's design requirements.

[0034] Optionally, the template is provided with a number of cooling pipes, all of which are connected to a water tank. Each cooling pipe is connected to the water tank, and a water pump is connected inside the water tank. The water pump can pump water from the water tank into each cooling pipe.

[0035] By adopting the above technical solution, when the injection material enters between the template and the front mold, the user closes the injection head, and then the water pump pumps the cooling water in the water tank into the cooling pipe of the template. The cooling water circulates between the cooling pipe and the water tank, and the cooling water carries away the heat of the template, thereby accelerating the molding and cooling of the air intake grille.

[0036] Optionally, a demolding structure is also included, comprising a demolding frame connected to the template and a first demolding ring connected to the template. The first demolding ring is detachably connected to a second demolding ring. A demolding groove is formed between the first demolding ring and the second demolding ring. The template, the first demolding ring, the second demolding ring, the front mold, and each of the moving modules together form a molding cavity. The molding cavity is connected to the demolding groove formed by the first demolding ring and the second demolding ring. A hydraulic cylinder is connected to the demolding frame away from the template. The hydraulic cylinder can drive the demolding frame, the template, the first demolding ring, and the second demolding ring to move away from the front mold.

[0037] By adopting the above technical solution, during user operation, the hot-melted injection molding material enters each injection head through the injection port of the mold body and the outlet through the manifold. Then, it enters the molding cavity formed by the mold plate, the first release ring, the second release ring, the front mold, and each moving module. The hot-melted injection molding material cools and solidifies within the molding cavity to form an air intake grille. Simultaneously, the hot-melted injection molding material also enters the release groove between the first and second release rings, forming connecting ear plates on the air intake grille for easy demolding and installation. Afterwards, the hydraulic cylinder drives the demolding frame to move, thereby moving the mold plate, the first release ring, and the second release ring away from the front mold, thus separating the formed air intake grille from the front mold and the moving module.

[0038] Optionally, a slide rod is connected to the demolding frame at the position corresponding to the first demolding ring, and the first demolding ring is slidably connected to the slide rod. The demolding structure also includes a demolding motor connected to the demolding frame. A demolding screw is installed on the output shaft of the demolding motor. The demolding screw is threadedly connected to the first demolding ring. The first demolding ring is fixedly connected to the template. The demolding screw is rotatably connected to the second demolding ring. The rotation of the demolding screw can drive the first demolding ring and the template to move away from the second demolding ring.

[0039] By adopting the above technical solution, when the user uses the product, the hydraulic cylinder drives the demolding frame, the moving template, the first demolding ring, and the second demolding ring to move, thereby separating the formed air intake grille from the front mold. Then, the demolding motor rotates, driving the demolding screw to rotate. The rotation of the demolding screw drives the first demolding ring to move away from the second demolding ring, thereby causing the formed air intake grille, which is located between the template, the first demolding ring, and the second demolding ring, to fall down, completing the injection molding process. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application;

[0041] Figure 2 This is a cross-sectional view of the overall structure of Embodiment 1 of this application;

[0042] Figure 3This is a schematic diagram of the front mold structure of Embodiment 1 of this application;

[0043] Figure 4 This is a cross-sectional view of the phantom structure of Embodiment 1 of this application;

[0044] Figure 5 This is a cross-sectional view of the template structure of Embodiment 1 of this application;

[0045] Figure 6 This is a first exploded view of Embodiment 1 of this application;

[0046] Figure 7 This is a second exploded view of Embodiment 1 of this application;

[0047] Figure 8 This is a schematic diagram of the damaged moving module in Embodiment 2 of this application;

[0048] Figure 9 This is a schematic diagram of the machining hole groove in Embodiment 2 of this application;

[0049] Figure 10 This is a schematic diagram of steps S2-S4 of Embodiment 2 of this application;

[0050] Figure 11 This is a schematic diagram of the completed assembly of Embodiment 2 of this application.

[0051] Explanation of reference numerals in the attached drawings: 1. Fixing frame; 11. Hydraulic cylinder; 12. Slide rod; 13. Demolding motor; 14. Demolding screw; 2. Mold body; 21. Cavity; 22. Runner; 23. Injection port; 24. Outlet port; 25. Injection head; 3. Front mold; 31. Moving mold groove; 32. Moving module; 33. Drive screw; 34. Clearance opening; 35. Auxiliary block; 36. Molding runner; 4. Demolding structure; 41. Demolding frame; 42. Template; 43. Cooling pipe; 44. Connecting pipe; 45. Water tank; 46. Water pump; 47. First demolding ring; 48. Second demolding ring; 49. Demolding groove; 5. Molding cavity; 6. Damaged location; 7. Hole / groove; 8. Insert; 9. Through hole. Detailed Implementation

[0052] Example 1: An injection mold for an air intake grille;

[0053] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail.

[0054] Embodiment 1 of this application discloses an air intake grille injection mold, referring to... Figures 1-3The system includes a fixed frame 1, a hydraulic cylinder 11 detachably connected to the fixed frame 1 by bolts, and a mold body 2 fixedly connected to the fixed frame 1. The mold body 2 forms a cavity 21, and a front mold 3 is detachably connected to the cavity 21 by bolts. The front mold 3 has multiple moving mold slots 31 on the side near the hydraulic cylinder 11. A moving module 32 is slidably connected to each moving mold slot 31 of the front mold 3. The moving module 32 can slide along the depth direction of the corresponding moving mold slot 31 of the front mold 3, and the moving module 32 can cover the moving mold slot 31 of the front mold 3. Each moving module 32 is rotatably connected to a drive screw 33 on the side away from the hydraulic cylinder 11. The drive screw 33 is threadedly connected to the front mold 3. The rotation of the drive screw 33 can drive the moving module 32 connected to it to slide along the moving mold slot 31 of the front mold 3. On the side of the front mold 3 furthest from the moving module 32, corresponding to the position of each drive screw 33, a clearance opening 34 is provided. The end of each drive screw 33 furthest from the moving module 32 it is connected to is located in the clearance opening 34 of the front mold 3. An auxiliary block 35, which is in the shape of a regular hexagonal prism, is fixedly connected to the end of each drive screw 33 furthest from the moving module 32 it is connected to. A molding flow channel 36 is formed between any two adjacent moving modules 32. The hot-melt injection molding material cools in the molding flow channel 36 to form the grid wall of the air intake grille.

[0055] Reference Figure 2 and Figure 4 The mold body 2 has a branch channel 22 at its central position. The branch channel 22 is tree-shaped and includes a main channel and multiple branch channels, which are interconnected. A glue inlet 23 is provided at the main channel of the branch channel 22, and the glue inlet 23 is connected to the branch channel 22. Each branch of the branch channel 22 has a glue outlet 24. The hot melt injection material injected from the glue inlet 23 can flow out through the branch channel 22 and multiple glue outlets 24 of the mold body 2. An injection head 25 is fixedly connected to each glue outlet 24 of the mold body 2. Each injection head 25 extends through the front mold 3 into the molding channel 36 between two adjacent moving modules 32. The molding channel 36 of the front mold 3 and the glue outlet 24 of the mold body 2 are connected through the corresponding injection head 25.

[0056] Reference Figure 2 and Figure 5The fixed frame 1 is also connected to a demolding structure 4, which includes a demolding frame 41 fixedly connected to the piston rod of the hydraulic cylinder 11 and a template 42 disposed between the demolding frame 41 and the front mold 3. Each moving module 32 connected to the front mold 3 can abut against the template 42. Four cooling pipes 43 are inserted inside the template 42, and the cooling pipes 43 are interconnected, with their axial direction along the width direction of the template 42. Connecting pipes 44 are fixedly connected to both ends of the four cooling pipes 43, and the connecting pipes 44 are connected to the four cooling pipes 43. The connecting pipes 44 are made of retractable corrugated hoses. A water tank 45 is fixedly connected to the mounting bracket 1. A water pump 46 is fixedly connected to one end of each of the two connecting pipes 44. The two water pumps 46 are fixedly connected to the top and bottom of the water tank 45, respectively. Each connecting pipe 44 is connected to the water tank 45 through its own connected water pump 46. Cooling water is provided in the water tank 45. The water pump 46 located at the bottom of the mounting bracket 1 can pump the water from the connecting pipes 44 and the cooling pipes 43 into the water tank 45. The water pump 46 located near the top of the water tank 45 can pump the water from the water tank 45 into the connecting pipes 44 and the four cooling pipes 43.

[0057] Reference Figure 2 , Figure 6 and Figure 7A first demolding ring 47 is fixedly connected to the side of the template 42 near the front mold 3. The cross-sectional area of ​​the first demolding ring 47 at the position away from the template 42 is larger than the cross-sectional area at the position near the template 42. Slide rods 12 are fixedly connected to the four corner positions of the demolding frame 41 corresponding to the first demolding ring 47. The length of the slide rods 12 is set along the width direction of the fixing frame 1. The first demolding ring 47 is slidably connected to the slide rods 12, and the first demolding ring 47 can drive the template 42 to slide along the length direction of the slide rods 12. A second demolding ring 48 is provided on the side of the first demolding ring 47 away from the template 42, and the second demolding ring 48 can abut against the side of the first demolding ring 47 away from the template 42. Demolding motors 13 are fixedly connected to both sides of the demolding frame 41 near the first demolding ring 47 along its own width direction. The output shaft of each demolding motor 13 is fixedly connected to a demolding screw 14, and the axial direction of each demolding screw 14 is set along the width direction of the fixing frame 1. The first demolding ring 47 is threaded to two demolding screws 14 near its two sides, with the screws 14 passing through the first demolding ring 47. The end of the demolding screw 14 furthest from the demolding motor 13 is rotatably connected to the second demolding ring 48. Rotation of the demolding screw 14 causes the first demolding ring 47 to slide axially along its axis. The template 42, the first demolding ring 47, the second demolding ring 48, the front mold 3, and each moving module 32 together form the molding cavity 5. The hot-melt injection molding material cools within the molding cavity 5 to form an air intake grille. The first demolding ring 47 and the second demolding ring 48 share a demolding groove 49 on one side, which communicates with the molding cavity 5.

[0058] The implementation principle of an air intake grille injection mold according to this application embodiment is as follows: The user adjusts the corresponding moving module 32 according to the design of the car air intake grille and the position and number of air intake channels. The user rotates the drive screw 33 so that the moving module 32 at the position where the air intake channel needs to be opened on the car air intake grille abuts against the template 42. After the mold is adjusted, the user injects the hot-melted injection material into the runner 22 of the mold body 2 through the injection port 23 of the injection molding machine. Then, the molten injection material flows along the runner 22 to each outlet 24 of the mold body 2. Then, it flows through the injection head 25 at each outlet 24 of the mold body 2 into the molding flow channel 36 formed by each moving module 32 connected to the front mold 3, and fills the entire molding cavity 5 along the molding flow channel 36, and fills the demolding groove 49 formed between the first demolding ring 47 and the second demolding ring 48 with the hot-melted injection material. After the hot-melted injection molding material completely fills the molding cavity 5 and the demolding groove 49, the user turns on the water pump 46. The water pump 46 pumps cooling water from the water tank 45 into the cooling pipe 43, and then the water flows back to the water tank 45 through the cooling pipe 43 to form a circulation, thereby removing heat from the mold plate 42 and accelerating the cooling of the car air intake grille in the molding cavity 5. After the air intake grille in the molding cavity 5 has completely cooled and formed, the hydraulic cylinder 11 is activated, causing the hydraulic rod of the hydraulic cylinder 11 to move the demolding frame 41 away from the mold body 2, thereby moving the mold plate 42, the first demolding ring 47 and the second demolding ring 48 away from the mold body 2, thereby causing the formed air intake grille to separate from the front mold 3 and the moving module 32. The user then activates two demolding motors 13, which drive the corresponding demolding screws 14 to rotate. The rotation of the demolding screws 14 causes the threaded first demolding ring 47 to move away from the second demolding ring 48, separating the demolding groove 49 formed by the first and second demolding rings 47. The molded air intake grille then falls between the first and second demolding rings 47 and 48, completing one injection molding process for the automotive grille. This method allows for adjustment of the opening position and number of air intake channels in the automotive grille according to different design requirements of the same automotive grille, eliminating the need for remolding and reducing costs.

[0059] Example 2: A method for sealing holes on the surface of an air intake grille injection mold without leaving marks;

[0060] The following is in conjunction with the appendix Figures 8-11 This application will be described in further detail.

[0061] Embodiment 2 of this application discloses a method for seamless hole sealing on the surface of an air intake grille injection mold, which includes:

[0062] S1: Reference Figure 8 and Figure 9 The damaged area on the outer surface of the moving module 32 is measured and the surface burrs are removed.

[0063] S2: Reference Figure 9 and Figure 10 At the damaged location 6 on the outer surface of the moving module 32, a high-speed machining center is used to machine the hole groove 7. The accuracy of the hole groove 7 is Φ10H7 and the surface finish is Ra0.8. The depth of the hole groove 7 is 1.5 times the diameter. A chamfer is machined on the bottom surface of the hole groove 7 with a chamfer size of R0.2.

[0064] S3: Reference Figure 9 and Figure 10 The insert 8 is made of the same material as the moving module 32 to ensure that the insert 8 and the moving module 32 have the same coefficient of thermal expansion and the same polishing effect after being assembled. The machining accuracy of the insert 8 is Φ10y6 and the surface finish is Ra0.8. The outer peripheral wall of the insert 8 is machined by a grinding machine so that the length of the insert 8 along its own axis is 10mm larger than the depth of the slot 7. A 1.5° taper is machined at the bottom 5mm position of the insert 8, and a chamfer with a size of R1.0 is machined at the bottom of the insert 8.

[0065] S4: Reference Figure 9 and Figure 10 A through hole 9 is machined at the bottom of the slot 7 of the moving module 32 to discharge the air in the slot 7 of the moving module 32 and reduce the air resistance encountered by the insert 8 when it extends into the slot 7 of the moving module 32. The through hole 9 is set through the moving module 32, and the diameter of the through hole 9 is much smaller than the diameter of the slot 7.

[0066] S5: Grind and clean the burrs in the slots 7 of the processed insert 8 and moving module 32;

[0067] S6: The moving module 32 is heated to 200℃ for 2 hours. According to the formula for calculating the thermal expansion and contraction of steel (℃*L*1.2) / 100000mm, the inner diameter of the slot 7 of the moving module 32 will increase by about 0.02mm after heating. At the same time, the insert 8 is frozen with liquid nitrogen at -196℃ for 2 hours. Since the moving module 32 and the insert 8 are made of the same material, and the absolute values ​​of the heating and freezing temperatures are also close, the outer diameter of the insert 8 will decrease by about 0.02mm according to the formula.

[0068] S7: By operating the instrument, insert the insert 8 into the slot 7 of the moving module 32, so that the axis of the insert 8 is collinear with the axis of the slot 7 of the moving module 32, and repeatedly tap the insert 8 to make the insert 8 completely fill the slot 7 of the moving module 32 and make the insert 8 abut against the bottom surface of the slot 7 of the moving module 32.

[0069] S8: Place the insert 8 and the moving module 32 at room temperature to cool naturally for 48 hours. After the insert 8 and the moving module 32 have cooled to room temperature, mill the part of the insert 8 that protrudes from the slot 7 of the moving module 32. Use a Φ10 milling cutter, a milling cutter speed of 1500 r / min, and a cutting amount of 0.2 mm to mill the part of the insert 8 that protrudes from the slot 7 of the moving module 32 to a distance of 0.5 mm from the surface of the moving module 32.

[0070] S9: Use a hand hammer to tap the insert 8 along the axial direction to make the insert 8 fully enter the hole 7 of the moving module 32. Then continue to process the top of the moving module 32 and the insert 8, and mill away 0.15mm from the surface of the moving module 32 and the insert 8 together.

[0071] S10: Reference Figure 11 The inlay surfaces of the inlay column 8 and the moving module 32 are polished to achieve a mirror finish.

[0072] The implementation principle of the method for seamless hole plugging on the surface of an air intake grille injection mold in Embodiment 2 of this application is as follows: Utilizing the significant thermal expansion and contraction characteristics of the mold material (mainly steel), the moving module 32 is heated to increase the diameter of the slot 7 processed to repair the broken area, while the insert 8 used to repair the broken area is frozen to reduce its outer diameter, making it easier for the insert 8 to enter the slot 7 of the moving module 32. After both return to room temperature, the insert 8 expands outward, while the slot 7 of the moving module 32 contracts inward, thus making the interference fit between the insert 8 and the slot 7 of the moving module 32 tighter. This expands the allowable tolerance range between the insert 8 and the slot 7 at room temperature from 0.02mm to 0.08mm, extending from the conventional H7 / n6 fit to an H7 / y6 fit. This further reduces the inlay line between the insert column 8 and the moving module 32, making the inlay line almost seamless. Combined with polishing, the repaired moving module 32 has a smooth injection molding surface when it participates in the processing of the air intake grille, without producing burrs, thus maintaining high processing quality.

[0073] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An injection mold for an air intake grille, characterized in that: include, The mold body (2) has a cavity (21) and the mold body (2) has an injection port (23); A plurality of glue outlets (24) are provided, and the glue outlets (24) are opened at the cavity (21) of the mold body (2); The flow channel (22) is located inside the mold body (2). The injection port (23) and several outlet ports (24) of the mold body (2) are all interconnected through the flow channel (22) of the mold body (2). The front mold (3) is detachably connected to the cavity (21) of the mold body (2); Template (42) is detachably connected to the mold body (2), and the template (42) is capable of covering the cavity (21) of the mold body (2); The moving module (32) is provided in several parts, and each moving module (32) is movably connected to the front mold (3). The moving module (32) can abut against the template (42), and a forming flow channel (36) is formed between any two adjacent moving modules (32). Injection head (25) is set at each of the glue outlets (24) of the mold body (2), and each glue outlet (24) is connected to the molding flow channel (36) formed by the adjacent moving module (32) through the injection head (25); It also includes a demolding structure (4), which includes a demolding frame (41) connected to the template (42) and a first demolding ring (47) connected to the template (42). The first demolding ring (47) is detachably connected to a second demolding ring (48). A demolding groove (49) is formed between the first demolding ring (47) and the second demolding ring (48). The template (42), the first demolding ring (47), the second demolding ring (48), and the front mold ( 3) Together with each of the moving modules (32), a molding cavity (5) is formed. The molding cavity (5) is connected to the demolding groove (49) formed by the first demolding ring (47) and the second demolding ring (48). The demolding frame (41) is connected to a hydraulic cylinder (11) away from the template (42). The hydraulic cylinder (11) can drive the demolding frame (41), template (42), first demolding ring (47) and second demolding ring (48) to move away from the front mold (3).

2. The air intake grille injection mold according to claim 1, characterized in that: The front mold (3) has a moving mold groove (31) at each position of the moving module (32). Each moving module (32) is slidably disposed in the moving mold groove (31) of the front mold (3). The moving module (32) can cover the moving mold groove (31) of the front mold (3). Each moving module (32) is connected to a drive screw (33). Each drive screw (33) is threadedly connected to the front mold (3). The drive screw (33) can drive the moving module (32) to slide along the depth direction of the moving mold groove (31) in the moving mold groove (31) of the front mold (3).

3. The air intake grille injection mold according to claim 1, characterized in that: The template (42) is provided with a number of cooling pipes (43), and each cooling pipe (43) is connected to a water tank (45). Each cooling pipe (43) is connected to the water tank (45), and the water tank (45) is connected to a water pump (46). The water pump (46) can pump water from the water tank (45) into each cooling pipe (43).

4. The air intake grille injection mold according to claim 3, characterized in that: The demolding frame (41) is connected to a slide rod (12) at the position corresponding to the first demolding ring (47). The first demolding ring (47) is slidably connected to the slide rod (12). The demolding structure (4) also includes a demolding motor (13) connected to the demolding frame (41). The output shaft of the demolding motor (13) is equipped with a demolding screw (14). The demolding screw (14) is threadedly connected to the first demolding ring (47). The first demolding ring (47) is fixedly connected to the template (42). The demolding screw (14) is rotatably connected to the second demolding ring (48). The rotation of the demolding screw (14) can drive the first demolding ring (47) and the template (42) to move away from the second demolding ring (48).

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