Double-color injection mold for door guard plate and process thereof

Abstract

The application relates to the field of injection molds, and discloses a double-color injection mold for a door guard plate and a process thereof, which comprises a rack, a first mold base and a second mold base fixed on the rack, a rotating disc rotatably connected to the rack, at least one plug-in module slidably connected to the rotating disc, a first mold cavity and a second mold cavity formed between the plug-in module and the first mold base and the second mold base respectively, the first mold cavity being used for forming a clamping block, a first feeding port and a first exhaust port communicated with the first mold cavity being formed in the first mold base, the second mold cavity being used for forming an outer plate, a second feeding port and a second exhaust port communicated with the second mold cavity being formed in the second mold base, a demolding device for demolding the door guard plate being arranged on the plug-in module, and a driving assembly for driving the plug-in module to slide and driving the rotating disc to rotate being further arranged on the rack. The application has the effects of reducing the working procedure of the automobile door guard plate and improving the production efficiency of the automobile door guard plate.

Description

Technical Field

[0001] This application relates to the field of injection molds, and in particular to a two-color injection mold for a door panel and its process. Background Technology

[0002] Double-sided injection molding uses two molten plastic materials injected into the same injection molding machine, forming the product in two stages, but the product only exits the mold once. This molding process is generally also called two-material injection molding, and it is usually completed with one set of molds and requires a specialized two-color injection molding machine.

[0003] Car door panels are an important part of the car interior. They must not only facilitate the use of the people inside the car, but also ensure their aesthetic appearance, and in the event of a car collision, they must absorb energy and reduce the injury to the people inside the car.

[0004] Automotive door panels consist of an outer panel and snap-fit ​​blocks. These snap-fit ​​blocks connect the outer panel to the vehicle structure, thus securing it in place. Because the thickness changes at the connection point between the outer panel and the snap-fit ​​blocks, injection molding them together can cause shrinkage marks on the outer panel's surface, affecting its appearance. Therefore, current technologies typically involve injection molding the outer panel and snap-fit ​​blocks separately, then using hot-plate welding to assemble the automotive door panel.

[0005] Regarding the aforementioned technologies, manufacturing the outer panel and the snap-fit ​​block separately, and then connecting the separately manufactured outer panel and the snap-fit ​​block together, results in a large number of production steps for door panels, leading to low production efficiency, which urgently needs improvement. Summary of the Invention

[0006] In order to reduce the number of processing steps in the production of automotive door panels and improve the efficiency of automotive door panel production, this application provides a two-color injection mold for door panels and its process.

[0007] The technical solution for the two-color injection mold and its process for door panels provided in this application is as follows:

[0008] A two-color injection mold for a door panel and its process are disclosed, comprising a frame, on which a first mold base and a second mold base are fixed. A rotating disk is rotatably connected to the frame, and at least one plug-in module is slidably connected to the rotating disk. The plug-in module forms a first mold cavity and a second mold cavity with the first mold base and the second mold base, respectively. The first mold cavity is used to form a snap-fit ​​block. The first mold base has a first inlet and a first vent communicating with the first mold cavity. The second mold cavity is used to form an outer panel. The second mold base has a second inlet and a second vent communicating with the second mold cavity. The plug-in module is provided with a demolding device for demolding the product. The frame is also provided with a drive assembly for driving the plug-in module to slide and drive the rotating disk to rotate.

[0009] By adopting the above technical solution, when processing the door panel, the plug-in module is first plugged into the first mold base under the action of the drive component. Then, molten plastic is injected through the first feed port to form a snap-fit ​​block in the first mold cavity and fix the snap-fit ​​block on the plug-in module. The plug-in module is then slid out and, with the help of the rotating disk, the plug-in module is aligned with the second mold base. The plug-in module is then plugged into the second mold base through the drive component. Molten plastic is then injected into the second mold cavity through the second feed port to form the outer panel and fix the outer panel on the snap-fit ​​block. After cooling and forming, the plug-in module is separated from the second mold base, and the formed door panel is demolded through the demolding device, thereby realizing the production of the door panel. This design, which first creates snap-fit ​​blocks, ensures a more uniform thickness of the outer panel during molding, reducing shrinkage and maintaining its aesthetic appeal. Furthermore, by creating snap-fit ​​blocks on the molded outer panel first, and then fixing the panel to these blocks during molding, the welding steps for the door panel are reduced, lowering processing costs and enabling workers to produce door panels more quickly and efficiently.

[0010] Preferably, the drive assembly includes a rotating gear rotatably connected to the rotating disk, a drive motor for driving the rotating gear to rotate is provided on the frame, and a rack that meshes with the rotating gear is provided on the side of the plug-in module near the rotating gear.

[0011] By adopting the above technical solution, the sliding of the plug-in module is achieved by using a rotating gear and a rack, which makes it easier for the plug-in module to press against the first mold base or the second mold base, thus improving the convenience of the plug-in module when sliding and demolding.

[0012] Preferably, the frame has a rotating groove for inserting a rotating disk, and the frame also has two sliding grooves corresponding to the first mold base and the second mold base respectively. The sliding grooves are connected to the rotating groove. The rotating disk has an insertion groove along the radial direction. The insertion module has a sliding block integrally formed on the side near the rotating disk. The sliding block has an abutting arc surface on the side away from the rotating disk that abuts against the side wall of the rotating groove. The sliding block slides radially and is connected to the sliding groove and the insertion groove. The insertion groove is provided with a compression spring for driving the sliding block away from the rotating gear.

[0013] By adopting the above technical solution, during use, the sliding block is driven by the rotating gear to slide into the insertion slot. When the sliding block is fully slid into the insertion slot, the rotating disk is driven to rotate. When the sliding block rotates to the sliding slot corresponding to the second mold base, the drive motor reverses. On the one hand, the sliding block is driven to move by the compression spring, and on the other hand, the sliding block is driven to move by the rotating gear and rack, so that the insertion module abuts against the second mold base. With this design, the insertion module can slide, and the rotating disk can be driven to rotate, thereby driving the insertion module to rotate. This realizes the insertion module from abutting against the first mold base to abutting against the second module, which improves the convenience of using the insertion module. Moreover, this design can reduce the complexity of the mold mechanical parts and reduce the mold manufacturing cost.

[0014] Preferably, the sliding block sidewall is integrally formed with a guide block along its sliding direction, and the sliding groove and the insertion groove sidewall are both provided with guide grooves that slide and cooperate with the guide block in the radial direction.

[0015] By adopting the above technical solution, the guide block is slidably connected in the guide groove, which can make the sliding block slide more stably and improve the convenience of using the sliding block.

[0016] Preferably, the demolding device includes a plurality of insertion holes through the insertion module, the insertion holes communicating with the first mold cavity, a first demolding rod slidably connected in the insertion holes, the first demolding rod being rotatably disposed in the insertion holes, a groove being provided on the inner wall of the insertion holes, a limiting slider being provided on the outer wall of the first demolding rod, the limiting slider being slidably disposed in the groove, and an abutment spring being provided on the outer wall of the first demolding rod, the abutment spring being used to drive the first demolding rod to slide closer to the rotating gear, and ensuring that the end of the first demolding rod away from the rotating gear is aligned with the side wall of the insertion module;

[0017] A limiting groove is provided on the side of the first demolding rod near the rotating gear. A support rod is inserted into the limiting groove. A fixing block is provided on the rotating disk. The rotating rod is fixed on the fixing block. A limiting block is provided on the outer wall of the support rod. A self-locking ring groove is provided on the inner wall of the limiting groove. The self-locking ring groove is used to switch the limiting block to the locked and unlocked states.

[0018] By adopting the above technical solution, the support rod is reciprocated to slide within the limiting groove, thereby driving the limiting block to move unidirectionally within the self-locking ring groove. During this process, the limiting block switches between closed and open states, allowing it to remain in different positions. When the limiting block is open within the self-locking ring groove, the insertion module cooperates with the first mold base, preventing the first demolding rod from contacting the locking block under the action of the abutment spring. When the limiting block is locked within the self-locking ring groove, the support rod can push the first demolding rod closer to the second mold base. At this point, the insertion module cooperates with the second mold base, thus achieving demolding of the molded door panel. This design allows for the switching between demolding when the insertion module is located at the first mold base and demolding when it is located at the second mold base, avoiding manual demolding by workers and improving the convenience of demolding the door panel.

[0019] Preferably, both the first mold base and the second mold base have through-holes for demolding. The demolding holes are connected to the first mold cavity or the second mold cavity. A second demolding rod is slidably disposed in the demolding hole. A connecting plate is disposed at the end of the second demolding rod away from the plug-in module. A limit rod is disposed on the side of the connecting plate near the rotating gear. The side of the limit rod away from the connecting plate abuts against the plug-in module to ensure that the side of the second demolding rod away from the connecting plate is aligned with the side wall of the first mold cavity or the side wall of the second mold cavity. A tension spring is sleeved on the limit rod, and the two ends of the tension spring are respectively fixed to the two sides of the connecting plate and the first mold base that are close to each other.

[0020] By adopting the above technical solution, when the plug-in module abuts against the first module or the second module, it pushes the limiting rod away from the plug-in module, thereby bringing one side of the second demolding rod closer to the side wall of the first mold cavity, thus reducing the impact on the molding die. When the plug-in module moves away from the first module and the second module, under the action of the tension spring, it drives the second demolding rod to move closer to the plug-in module, thereby driving the product to detach from the first module and the second module, achieving the demolding effect. This can reduce the adhesion between the product and the first module or the second module and improve the convenience of manufacturing door panels.

[0021] Preferably, there are two plug-in modules, which are slidably arranged relative to each other, and the two racks are arranged parallel to each other. Each of the two plug-in modules has a limiting slot on its two sides that are close to each other, which is engaged with the rack. The side of the rack away from the rotating gear abuts against the side wall of the limiting slot.

[0022] By adopting the above technical solution, when the two plug-in modules move together, the plug-in rack and the limiting slot can improve the strength of the rack and reduce the occurrence of damage to the rack. It can also make the plug-in module more firmly press against the first or second module. Furthermore, using two plug-in modules allows the outer panel to be manufactured simultaneously when the snap-fit ​​block is being made, thus improving the efficiency of door panel production.

[0023] Preferably, multiple fixing blocks are provided, and the fixing blocks are located on the side of the rack away from the rotating gear, with the side of the rack away from the rotating gear abutting against the fixing blocks.

[0024] By adopting the above technical solution, the fixed block can limit the rack, reduce the occurrence of rack deformation, and improve the stability of rack use.

[0025] A two-color injection molding process for door panels includes the following steps:

[0026] S1: First, the first mold base is pressed and fixed against the plug-in module, and molten material is injected into the first mold cavity;

[0027] S2: The molten material cools and solidifies, forming a snap-fit ​​block;

[0028] S3: The first mold base separates from the plug-in module, and the snap-fit ​​block is fixed to the plug-in module.

[0029] S4: Secure the plug-in module with the snap-fit ​​block against the second module base;

[0030] S5: Then inject the molten material into the second mold cavity, so that the molten material fully contacts the snap-fit ​​block and fixes the formed outer plate onto the snap-fit ​​block;

[0031] S6: The molten material is cooled and molded to form a door panel consisting of a snap-fit ​​block and an outer panel;

[0032] S7: Finally, separate the plug-in module from the second mold base and remove the formed door panel.

[0033] By adopting the above technical solution, the snap-fit ​​block is first injection molded. After the snap-fit ​​block is formed, it is placed in the second cavity, and the outer panel is then made, connecting the outer panel to the snap-fit ​​block. This design allows for the snap-fit ​​block to be made first, ensuring a more uniform thickness for the outer panel during production. This reduces shrinkage and improves the overall aesthetics of the outer panel. Furthermore, this design reduces the steps required for hot-melt welding of the snap-fit ​​block and the outer panel, enabling faster and more efficient door panel production, lowering production costs, and increasing the ease of door panel manufacturing.

[0034] In summary, this application includes at least one of the following beneficial technical effects:

[0035] 1. By first producing the snap-fit ​​block through the interlocking module and the second mold base, the thickness of the second mold cavity is more uniform when the interlocking module and the second mold base are used to produce the outer panel, which reduces the phenomenon of shrinkage on the outer panel and ensures the aesthetics of the outer panel. Moreover, by first producing the snap-fit ​​block before forming the outer panel, the number of processing steps for the door panel is reduced, the processing cost of the door panel is reduced, and the workers can produce door panels more quickly and efficiently.

[0036] 2. A rotating gear drives a sliding block to slide into the insertion slot. Once the sliding block is fully inserted, it drives a rotating disk to rotate. When the sliding block reaches the sliding slot corresponding to the second mold base, the drive motor reverses direction. This reverses the rotation, moving the sliding block via a compression spring and simultaneously via the rotating gear and rack, causing the insertion module to abut against the second mold base. This allows for both sliding of the insertion module and rotation of the rotating disk. This improves the ease of using injection molds, reduces the complexity of mold mechanical parts, and lowers mold manufacturing costs.

[0037] 3. The drive motor reciprocates to move the support rod within the limiting groove, thereby driving the limiting block to move unidirectionally within the self-locking ring groove. During this process, the limiting block switches between closed and open states, allowing it to remain in different positions. When the limiting block is open within the self-locking ring groove, the insertion module engages with the first mold base, preventing the first demolding rod from contacting the locking block under the action of the spring. When the limiting block is locked within the self-locking ring groove, the support rod pushes the first demolding rod closer to the second mold base. At this point, the insertion module engages with the second mold base, thus achieving demolding of the molded door panel. This design allows for the switching between demolding when the insertion module is located at the first mold base and demolding when located at the second mold base, avoiding manual demolding by workers and improving the convenience of product demolding. Attached Figure Description

[0038] Figure 1This is a structural schematic diagram of a two-color injection mold for a door panel and its process according to an embodiment of this application.

[0039] Figure 2 This is a cross-sectional view of a two-color injection mold for a door panel and its process, according to an embodiment of this application. Figure 1 .

[0040] Figure 3 This is a cross-sectional view of a two-color injection mold for a door panel and its process, according to an embodiment of this application. Figure 2 .

[0041] Figure 4 yes Figure 2 An enlarged schematic diagram of part A in the middle.

[0042] Figure 5 This is a schematic diagram of the structure of a two-color injection mold for a door panel and the self-locking ring groove of the limiting groove in the process of the present application.

[0043] Reference numerals: 1. Frame; 2. Support rod; 3. Fixing block; 4. Rack; 5. Limiting rod; 6. Connecting plate; 7. Tension spring; 8. Second demolding rod; 9. First mold base; 10. First mold cavity; 11. Rotating disk; 12. Rotating gear; 13. Insertion module; 14. Second mold cavity; 15. Second mold base; 16. Limiting slot; 17. Compression spring; 18. Sliding block; 19. Drive motor; 20. Rotating groove; 21. Insertion groove; 22. Sliding groove; 23. Limiting block; 24. Slide groove; 25. Abutment spring; 26. Insertion hole; 27. First demolding rod; 28. Limiting slider; 29. ​​Self-locking ring groove; 291. First process groove; 292. Second process groove; 293. Second exit groove; 294. First exit groove; 295. Second locking groove; 30. Second feed port; 31. Second vent; 32. First vent; 33. First feed port; 34. Guide block; 35. Guide groove; 36. Limiting groove. Detailed Implementation

[0044] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0045] This application discloses a two-color injection mold for door panels.

[0046] Reference Figure 1 and Figure 2A two-color injection mold for a door panel includes a frame 1. A first mold base 9 and a second mold base 15 are fixed to one side of the frame 1. A rotating disk 11 is rotatably connected to the frame 1. The rotating disk 11 is disc-shaped, and two plug-in modules 13 are radially slidably connected to the rotating disk 11. The two plug-in modules 13 slide relative to each other, forming a first mold cavity 10 and a second mold cavity 14 between the two plug-in modules 13 and the first mold base 9 and the second mold base 15, respectively. The first mold cavity 10 is used to form a snap-fit ​​block, and the second mold cavity 14 is used to form an outer panel and connect it to the snap-fit ​​block. The first mold base 9 has a first inlet 33 and a first vent 32 on its side away from the plug-in modules 13. Both the first inlet 33 and the first vent 32 are connected to the first mold cavity 9. The second mold base 15 has a second inlet 30 and a second vent 31 on its side away from the plug-in modules 13. Both the second inlet 30 and the second vent 31 are connected to the second mold cavity 14. The plug-in module 13 is fixed with a demolding device for demolding the molded door panel, and the frame 1 is provided with a drive assembly for driving the plug-in module 13 and driving the rotating disk 11 to rotate.

[0047] This design first forms a snap-fit ​​block by cooperating with the first mold base 9 and the plug-in module 13. Then, the plug-in module 13 with the snap-fit ​​block is placed on the second mold base 15, and the outer panel is injection molded. This not only ensures that the thickness of the outer panel is basically uniform during injection molding, reducing the phenomenon of shrinkage on the outer panel, thereby improving the overall molding effect of the door panel, but also allows the outer panel to be connected to the snap-fit ​​block by covering the snap-fit ​​block with molten plastic. This reduces the number of steps in processing the door panel, lowers the cost of processing the door panel, and enables workers to produce door panels more efficiently.

[0048] Reference Figure 2 and Figure 3 The drive assembly includes a drive motor 19 fixed to the frame 1 and a rotating gear 12 rotatably connected to the rotating disk 11. A drive shaft, cylindrical in shape, is mounted on the drive motor 19 and passes through both the frame 1 and the rotating disk 11. The rotating gear 12 is fixed to the end of the drive shaft furthest from the drive motor 19. Two racks 4, meshing with the rotating gear 12, are welded to the sides of two adjacent plug-in modules 13. The two racks 4 are distributed on both sides of the drive motor 19 and are arranged parallel to each other. Two fixing blocks 3 are welded to the rotating disk 11, respectively fixed to the two racks 4 on their furthest sides. The fixing blocks 3 are rectangular blocks. The side of the rack 4 furthest from the rotating gear 12 abuts against the fixing block 3 and slides on the sidewall of the fixing block 3. Limiting slots 16 for engaging with the racks 4 are provided on both sides of the two adjacent plug-in modules 13. The side of the rack 4 furthest from the rotating gear 12 abuts against the sidewall of the limiting slot 16.

[0049] Reference Figure 2 and Figure 3 The frame 1 has a rotating groove 20 for inserting the rotating disk 11. The radius of the rotating disk 11 is the same as the radius of the rotating groove 20. The frame 1 also has two sliding grooves 22 that correspond to the first mold base 9 and the second mold base 15 respectively. The sliding grooves 22 are opened radially and are connected to the rotating grooves 20. The rotating disk 11 has an insertion groove 21 in the radial direction. The insertion groove 21 and the sliding groove 22 have the same width. A sliding block 18 is integrally formed on the side of the plug-in module 13 near the rotating disk 11. The side of the sliding block 18 away from the rotating disk 11 has an abutment arc surface that abuts against the side wall of the rotating groove 20. The sliding block 18 is slidably connected within the sliding groove 22 and the plug-in groove 21. A guide block 34 is integrally formed on the side of the sliding block 18 away from the plug-in module 13 along its sliding direction. The guide block 34 is boss-shaped, and its thickness gradually decreases in the direction away from the sliding block 18. Guide grooves 35, which slide and cooperate with the guide block 34, are radially formed on the bottom sides of both the plug-in groove 21 and the sliding groove 22. The guide grooves 35 are dovetail-shaped. A compression spring 17 for driving the sliding block 18 away from the rotating gear 12 is fixed on the side plate of the plug-in groove 21. A mounting groove for installing the compression spring 17 is formed on the side of the sliding block 18 near the rotating gear 12. The two ends of the compression spring 17 abut against the bottom of the mounting groove and the side wall of the plug-in groove 21, respectively.

[0050] Using this method, during operation, the drive motor 19 drives the rotating gear 12 to rotate, causing the other rack 4 to move away from the rotating gear 12, thereby causing the two plug-in modules 13 to abut against the first mold base 9 and the second mold base 15 respectively, and the snap-fit ​​block is injection molded in the first mold cavity 10. After the snap-fit ​​block cools and solidifies, the drive motor 19 drives the plug-in module 13 to disengage from the first mold base 9. When the sliding block 18 slides completely into the plug-in in the sliding groove 22, the sliding block 18 abuts against the bottom of the plug-in groove 21, thereby locking the two racks 4. At the same time, the abutting arc surface abuts against the side wall of the rotating groove 20. Driven by the drive motor 19, the rotating disk 11 rotates, thereby causing the plug-in module 13 with the snap-fit ​​block to rotate to the second mold base 15. When the sliding block 18 retracts, the drive motor 19 needs to overcome the elastic force of the compression spring 17 to retract. After the sliding block 18 rotates into the rotating groove 20, the abutting arc surface abuts against the side wall of the rotating groove 20, so that the supporting force of the abutting arc surface on the rotating groove 20 is balanced by the tension of the rack 4 and the elastic force of the compression spring. When the sliding block 18 rotates to the sliding groove 22 corresponding to the second mold base 15, under the action of the compression spring 17, the sliding block 18 is precisely pushed into the sliding groove 22. With the reverse rotation of the drive motor 19, the sliding block 18 moves, so that the plug-in module 13 abuts against the second mold base 15. With this design, the drive motor 19 can realize both the movement of the sliding block 18 and the rotation of the rotating disk 11, which makes the plug-in mold base more convenient to use, reduces the complexity of the mold, and lowers the mold manufacturing cost.

[0051] Reference Figure 4 and Figure 5The demolding device includes multiple insertion holes 26 extending through the sliding direction of the sliding block 18. The insertion holes 26 are interconnected with the first mold cavity 10 or the second mold cavity 14. A first demolding rod 27 is slidably connected in the insertion holes 26. The first demolding rod 27 is cylindrical and rotatably connected in the insertion holes 26. A groove 24 is provided on the inner wall of the insertion holes 26. A limiting slider 28 is fixed on the outer wall of the first demolding rod 27. The limiting slider 28 is annular and slidably connected in the groove 24. An abutment spring 25 is sleeved on the outer wall of the first demolding rod 27. The two ends of the abutment spring 25 abut against the end of the limiting slider 28 away from the rotating gear 12 and the side of the groove 24 away from the rotating gear 12, respectively. This enables the abutment spring 25 to drive the first demolding rod 27 to slide towards the side closer to the rotating gear 12, ensuring that the end of the first demolding rod 27 away from the rotating gear 12 is aligned with the side wall of the insertion module 13. The first demolding rod 27 has a limiting groove 36 on the side near the rotating gear 12. A support rod 2 is inserted into the limiting groove 36. The end of the support rod 2 away from the insertion module 13 is welded and fixed to the fixing block 3. A limiting block 23 is welded and fixed to the outer wall of the support rod 2. The end of the limiting block 23 away from the support rod 2 is smoothly set. A self-locking ring groove 29 is opened on the inner wall of the limiting groove 36. The self-locking ring groove 29 is used to switch the limiting block 23 to the locked and open states.

[0052] Reference Figure 4 and Figure 5 The self-locking ring groove 29 includes a first progress groove 291, a first exit groove 294, a second progress groove 292, a second locking groove 295, and a second exit groove 293 connected end to end. When the plug-in module 13 first abuts against the first mold base 9, the limiting block 23 slides in the first progress groove 291; when the plug-in module 13 separates from the first mold base 9, the limiting block 23 slides in the first exit groove 294; when the plug-in module 13 abuts against the second mold base 15, the limiting block 23 slides in the second progress groove 292; when the plug-in module 13 separates from the second mold base 15, the limiting block 23 engages in the second locking groove 295. This allows the support rod 2 to support the first demolding rod 27 via the limiting block 23. As the insertion module 13 moves closer to the rotating gear 12, the door panel, supported by the demolding rod, is demolded. After demolding, the insertion mold base is driven to move closer to the second module, and the first demolding rod 27 retracts into the insertion hole 26 under the action of the compression spring 17, causing the limiting block 23 to disengage from the second locking groove 295. The insertion module 13 is then driven to move closer to the rotating gear 12 again, and the limiting block 23 slides within the second exit groove 293, thus completing the overall movement of the limiting block 23. This design eliminates the need for demolding the snap-fit ​​blocks during production. After the outer panel is completed, the finished door panel is demolded, improving the ease of demolding.

[0053] Reference Figure 2 and Figure 4 Both the first mold base 9 and the second mold base 15 have multiple demolding holes extending through them along the sliding direction of the plug-in module 13. These demolding holes are connected to the first mold cavity 10 or the second mold cavity 14. The demolding holes are cylindrical holes, and a second demolding rod 8 is slidably connected within each demolding hole. The second demolding rod 8 is a cylindrical rod, and a connecting plate 6 is fixed to the end of the second demolding rod 8 away from the plug-in module 13. The connecting plate 6 is a rectangular plate, and multiple limiting rods 5 are fixed to the side of the connecting plate 6 near the rotating gear 12. The limiting rods 5 are cylindrical rods that extend through the first mold base 9 or the second mold base 15. The side of the limiting rod 5 away from the connecting plate 6 abuts against the plug-in module 13 to ensure that the side of the second demolding rod 8 away from the connecting plate 6 is aligned with the side wall of the first mold cavity 10 or the side wall of the second mold cavity 14. A tension spring 7 is sleeved on the limiting rod 5, and both ends of the tension spring 7 are fixed to the sides of the connecting plate 6 and the first mold base 9 or the second mold base 15 that are close to each other.

[0054] With this design, when the insert mold base abuts against the first mold base 9 or the second mold base 15, the driving limit rod 5 moves, thereby aligning the end of the second demolding rod 8 away from the connecting plate 6 with the side wall of the first mold cavity 10 or the side wall of the second mold cavity 14, thus avoiding affecting the molding of the outer plate; when the insert module 13 retracts, the limit rod 5 moves closer to the insert module 13 under the action of the tension spring 7, thereby separating the snap-fit ​​block from the first mold base 9 or the outer plate from the second mold base 15 under the action of the second demolding rod 8, reducing the occurrence of the snap-fit ​​block sticking to the first mold base 9 and the outer plate sticking to the second mold base 15, and improving the convenience of using the injection mold.

[0055] The implementation principle of the two-color injection mold for door panels and its process in this application embodiment is as follows: During operation, two plug-in modules 13 are respectively abutted against the first mold base 9 and the second mold base 15. Molten plastic is injected into the first mold cavity 10. After cooling and molding, the plug-in module 13 is separated from the first mold base 9 under the action of the drive motor 19. At the same time, the snap-fit ​​block is pushed out of the first mold base 9 under the action of the second demolding rod 8. The drive motor 19 drives the rack 4, which in turn drives the plug-in module 13 to slide, pulling the sliding block 18 into the plug-in groove 21. This causes the two plug-in modules 13 and the rotating disk 11 to rotate. The compression spring 17 pushes the sliding block 18 into the sliding groove 22. The drive motor 19 then reverses to make the plug-in module 13 press against the second mold base 15, and molten plastic is injected into the second mold cavity 14. After cooling and molding, the drive motor 19 pulls the plug-in module 13 away from the second mold base 15. Under the action of the second demolding rod 8, the outer panel separates from the second mold base 15. At the same time, the support rod 2 restricts the movement of the second demolding rod 8, causing the first demolding rod 27 to move relative to the plug-in module 13. Under the action of the first demolding rod 27, the molded door panel is detached from the plug-in mold base, thus realizing the production of the door panel. This method not only ensures that the thickness of the outer panel is nearly uniform during production, thus improving the molding effect of the door panel, but also reduces the steps in the production of the door panel, making it more convenient for workers and improving the efficiency of door panel production.

[0056] A two-color injection molding process for door panels includes the following steps:

[0057] First injection molding:

[0058] S1: First, the first mold base 9 is pressed and fixed against the plug-in module 13 under the action of the drive motor 19 and the rack 4 to form the first mold cavity 10, and molten plastic material is injected into the first mold cavity 10.

[0059] S2: Molten plastic material cools and solidifies, forming snap-fit ​​blocks;

[0060] S3: Under the pull of the drive motor 19 and the rack 4, the first mold base 9 is separated from the plug-in module 13, and under the support of the second demolding rod 8, the snap-fit ​​block is separated from the first mold base 9, and the snap-fit ​​block is fixed on the plug-in module 13.

[0061] Second injection molding:

[0062] S4: The sliding block 18 is retracted to the bottom of the insertion slot 21. The drive motor 19 drives the rotating disk 11 and the insertion module 13 to rotate. When the sliding block 18 corresponds to the sliding slot 22, the drive motor 19 pushes the insertion module 13 with the snap-fit ​​block to abut against the second mold base 15 and form the second mold cavity 14.

[0063] S5: Then inject the molten plastic material into the second mold cavity 14, so that the molten plastic material fully contacts the snap-fit ​​block and fixes the formed outer plate onto the snap-fit ​​block;

[0064] S6: The molten material is cooled and molded to form a door panel consisting of a snap-fit ​​block and an outer panel;

[0065] S7: Finally, under the action of the drive motor 19, the drive plug-in module 13 is driven away from the second mold base 15. Under the action of the second demolding rod 8, the outer plate is separated from the second mold base 15. At the same time, under the support of the support rod 2 and the second demolding rod 8, the formed door guard is separated from the plug-in mold block, thereby completing the processing of the door guard panel.

[0066] The principle of this two-color injection molding process for door panels is:

[0067] First, the snap-fit ​​block is created through a first injection molding process. Then, a second injection molding process is performed with the snap-fit ​​block in place to create the outer panel, which is then fixed onto the snap-fit ​​block, thus completing the door panel production. Directly molding the outer panel into the second mold cavity 14 containing the snap-fit ​​block ensures a more uniform thickness, reduces shrinkage marks, and eliminates the need for subsequent welding steps. This reduces the workload for workers, lowers the cost of door panel production, and improves the ease of manufacturing.

[0068] 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. A two-color injection mold for door panels, characterized in that: Includes a frame (1), on which a first mold base (9) and a second mold base (15) are fixed. A rotating disk (11) is rotatably connected to the frame (1), and at least one plug-in module (13) is slidably connected to the rotating disk (11). The plug-in module (13) forms a first mold cavity (10) and a second mold cavity (14) between itself and the first mold base (9) and the second mold base (15), respectively. The first mold cavity (10) is used to form a snap-fit ​​block. The first mold base (9) has an opening... The first feed port (33) and the first exhaust port (32) are connected to the first mold cavity (10). The second mold cavity (14) is used to form the outer plate. The second mold base (15) is provided with a second feed port (30) and a second exhaust port (31) connected to the second mold cavity (14). The plug-in module (13) is provided with a demolding device for demolding the product. The frame (1) is also provided with a drive assembly for driving the plug-in module (13) to slide and drive the rotating disk (11) to rotate. The drive assembly includes a rotating gear (12) rotatably connected to the rotating disk (11), a drive motor (19) for driving the rotating gear (12) to rotate is provided on the frame (1), and a rack (4) that meshes with the rotating gear (12) is provided on the side of the plug-in module (13) near the rotating gear (12). The frame (1) is provided with a rotating groove (20) for inserting the rotating disk (11). The frame (1) is also provided with two sliding grooves (22) corresponding to the first mold base (9) and the second mold base (15) respectively. The sliding grooves (22) are connected to the rotating grooves (20). The rotating disk (11) is provided with a insertion groove (21) in the radial direction. The insertion module (13) is integrally formed with a sliding block (18) on the side close to the rotating disk (11). The sliding block (18) is provided with an abutting arc surface on the side away from the rotating disk (11) that abuts against the side wall of the rotating groove (20). The sliding block (18) is slidably connected in the sliding groove (22) and the insertion groove (21) in the radial direction. The insertion groove (21) is provided with a compression spring (17) for driving the sliding block (18) away from the rotating gear (12).

2. The door panel two-color injection mold according to claim 1, characterized in that: The sliding block (18) has a guide block (34) integrally formed on its side wall along its sliding direction. The sliding groove (22) and the insertion groove (21) are both provided with guide grooves (35) that slide and cooperate with the guide block (34) in the radial direction.

3. The door panel two-color injection mold according to claim 1, characterized in that: The demolding device includes a plurality of insertion holes (26) through the insertion module (13), the insertion holes (26) being connected to the first mold cavity (10), a first demolding rod (27) being slidably connected in the insertion holes (26), the first demolding rod (27) being rotatably disposed in the insertion holes (26), a sliding groove (24) being provided on the inner wall of the insertion holes (26), a limiting slider (28) being provided on the outer wall of the first demolding rod (27), the limiting slider (28) being slidably disposed in the sliding groove (24), and an abutment spring (25) being provided on the outer wall of the first demolding rod (27), the abutment spring (25) being used to drive the first demolding rod (27) to slide closer to the rotating gear (12), and ensuring that the end of the first demolding rod (27) away from the rotating gear (12) is aligned with the side wall of the insertion module (13); The first demolding rod (27) has a limiting groove (36) on the side near the rotating gear (12). A support rod (2) is inserted into the limiting groove (36). A fixing block (3) is provided on the rotating disk (11). The support rod (2) is fixed on the fixing block (3). A limiting block (23) is provided on the outer wall of the support rod (2). A self-locking ring groove (29) is provided on the inner wall of the limiting groove (36). The self-locking ring groove (29) is used to switch the limiting block (23) to the locked and unlocked states.

4. A two-color injection mold for a door panel according to claim 3, characterized in that: Both the first mold base (9) and the second mold base (15) have through-holes for demolding. The demolding holes are connected to the first mold cavity (10) or the second mold cavity (14). A second demolding rod (8) is slidably disposed in the demolding hole. A connecting plate (6) is disposed at the end of the second demolding rod (8) away from the plug-in module (13). A limiting rod (5) is disposed on the side of the connecting plate (6) near the rotating gear (12). The side of the limiting rod (5) away from the connecting plate (6) abuts against the plug-in module (13) to ensure that the side of the second demolding rod (8) away from the connecting plate (6) is consistent with the side wall of the first mold cavity (10) or the side wall of the second mold cavity (14). A tension spring (7) is sleeved on the limiting rod (5). The two ends of the tension spring (7) are respectively fixed to the two sides of the connecting plate (6) and the first mold base (9) that are close to each other.

5. A two-color injection mold for a door panel according to claim 3, characterized in that: Two plug-in modules (13) are provided. The two plug-in modules (13) are slidably arranged relative to each other, and the two racks (4) are arranged parallel to each other. Limiting slots (16) that are engaged with the racks (4) are opened on both sides of the two plug-in modules (13) that are close to each other. The side of the rack (4) away from the rotating gear (12) abuts against the side wall of the limiting slot (16).

6. A two-color injection mold for a door panel according to claim 5, characterized in that: Multiple fixing blocks (3) are provided. The fixing blocks (3) are located on the side of the rack (4) away from the rotating gear (12). The side of the rack (4) away from the rotating gear (12) abuts against the fixing blocks (3).

7. A two-color injection mold for a door panel according to any one of claims 1-6, further comprising a two-color injection molding process for a door panel, characterized in that: Includes the following steps: S1: First, the first mold base (9) is pressed and fixed against the plug-in module (13), and molten material is injected into the first mold cavity (10); S2: The molten material cools and solidifies, forming a snap-fit ​​block; S3: The first mold base (9) is separated from the plug-in module (13), and the snap-fit ​​block is fixed on the plug-in module (13); S4: Secure the plug-in module (13) with the snap-fit ​​block against the second module base (15); S5: Then inject the molten material into the second mold cavity (14) so ​​that the molten material can fully contact the snap-fit ​​block and fix the formed outer plate on the snap-fit ​​block; S6: The molten material is cooled and molded to form a door panel consisting of a snap-fit ​​block and an outer panel; S7: Finally, separate the plug-in module (13) from the second mold base (15) and remove the formed door panel.

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