Double-side rubber coating mold for double-color injection molding production

Abstract

The invention relates to a double-side rubber coating mold for double-color injection molding production, and belongs to the technical field of molds, the double-side rubber coating mold comprises a fixed mold and a movable mold which are matched with each other, and a first cavity used for forming a framework and a second cavity used for coating rubber on the formed framework are formed between the fixed mold and the movable mold; the second cavity comprises a positioning cavity for positioning a framework and an end rubber coating cavity which is communicated with the positioning cavity and is used for forming a framework end sealing element; an extension cavity for forming rubber coating connecting layers on the front and back surfaces of the framework is formed at the joint of the end rubber coating cavity and the positioning cavity, and the extension cavity comprises a front surface coating cavity and a back surface coating cavity which are respectively positioned on the sides where the fixed mold and the movable mold are positioned. By adopting the scheme that the first cavity and the second cavity share the same mold, the problems of complex working procedures caused by double molds / double machines of a double-side rubber-coated structure product and resource occupation of an injection molding machine are solved, the development and production cost of the mold can be reduced, and the production efficiency of the product is improved.

Description

Technical Field

[0001] The present application relates to the field of mold technology, and in particular to a double-sided glue-coated mold produced by two-color injection molding. Background Art

[0002] As the automotive industry continues to pursue lightweighting, functional integration, and aesthetically pleasing designs, two- or multi-color injection molding is becoming increasingly common in automotive parts. For example, products such as two-color visors (black + transparent) for automotive lighting, active air intake grilles (hard + soft plastic), and air conditioning air intake flaps (hard + soft plastic) all require two-color injection molding to achieve the integration of complex structures and diverse materials.

[0003] In the related art, a rotary double-shot injection molding solution is usually used for two-color products with a single-sided adhesive coating structure (such as lamp masks). This solution involves opening the mold twice, rotating the movable mold side 180 degrees, and then injecting glue into the mold cavity separately, ultimately completing the molding of the two-color product. However, for two-color products with a double-sided adhesive coating structure (such as air conditioning air intake dampers), the mold design in the existing technology has significant flaws: two independent molds need to be developed to correspond to hard and soft adhesive molding respectively, resulting in a long mold development cycle and high costs; the dual-mold / dual-machine production model occupies the resources of two injection molding machines, limiting production efficiency. During the secondary mold closing, problems such as positioning errors between the skeleton and the adhesive coating cavity and shrinkage rate mismatch can easily cause product misalignment or appearance defects.

[0004] Therefore, it is necessary to study and improve the above structural problems and provide a double-sided gluing mold design method for two-color injection molding production to achieve the purpose of simplifying the mold structure, reducing production costs, and improving molding efficiency and product qualification rate. Summary of the Invention

[0005] In response to the shortcomings or one of the shortcomings of the above-mentioned background technology, an embodiment of the present application provides a double-sided glued mold produced by two-color injection molding to solve the problems in the related technology that double-sided glued structural products require two molds / two machines for production, resulting in complex processes, high resource consumption, high costs and low production efficiency.

[0006] The present invention provides a double-sided glue-coated mold produced by two-color injection molding, comprising: A fixed mold and a movable mold cooperate with each other, wherein a first cavity for molding the skeleton and a second cavity for encapsulating the molded skeleton are provided between the fixed mold and the movable mold, wherein the second cavity includes a positioning cavity for positioning the skeleton and an end encapsulation cavity connected to the positioning cavity and used for molding the end seal of the skeleton; An extension cavity for forming an adhesive connection layer on the front and back sides of the skeleton is formed at the connection between the end adhesive cavity and the positioning cavity. The extension cavity includes a front covering cavity and a back covering cavity respectively located on the sides where the fixed mold and the movable mold are located.

[0007] In some embodiments, the fixed mold is provided with a first fixed mold core and a second fixed mold core, and the movable mold is provided with a first movable mold core and a second movable mold core; The first fixed mold core is provided with a first concave surface, and the first movable mold core is provided with a first convex surface, and the first concave surface and the first convex surface are aligned with each other to form a first cavity; The second fixed mold core is provided with a second concave surface, and the second movable mold core is provided with a second convex surface, and the second concave surface and the second convex surface are aligned with each other to form the second cavity; A first glue-blocking boss is provided on the second concave surface of the second fixed mold core, and the first glue-blocking boss is located at an end of the front coating cavity away from the end coating cavity; A second glue-blocking boss is provided on the second convex surface of the second movable mold core, and the second glue-blocking boss is located at an end of the reverse covering cavity away from the end covering cavity.

[0008] In some embodiments, the second concave surface on the second fixed mold core includes a clamping surface for cooperating with the second convex surface to clamp the skeleton, and the clamping surface is provided with a glue groove connected to the end glue-wrapped cavity, and the glue groove is provided with a glue injection hole connected to the glue groove at one end away from the end glue-wrapped cavity.

[0009] In some embodiments, the fixed mold is provided with a second main gate and a second hot runner plate connected to the second main gate, the second hot runner plate is connected to a second hot nozzle with one end extending into the second fixed mold core and connected to the injection hole, and a second pneumatic needle valve assembly for controlling the opening and closing of the second hot nozzle.

[0010] In some embodiments, the fixed mold is provided with a first main gate and a first hot runner plate connected to the first main gate; the first hot runner plate is connected to a first hot nozzle having one end extending into the first fixed mold core and used for injecting glue into the first cavity; and a first pneumatic needle valve assembly for controlling the opening and closing of the first hot nozzle.

[0011] In some embodiments, an insert is provided on the second fixed mold core, and a long-side rubber-encapsulated cavity with a Y-shaped cross-section is formed between the insert, the second fixed mold core, and the second movable mold core; The movable mold is symmetrically provided with sliders at both ends of the insert, and the fixed mold is symmetrically provided with inclined columns for driving the sliders on both sides to move closer to or away from each other; A short-side rubber-wrapped cavity with a Y-shaped cross-section is formed between the slider, the second fixed mold core, and the second movable mold core. The long-side rubber-wrapped cavity and the short-side rubber-wrapped cavity together form the end rubber-wrapped cavity.

[0012] In some embodiments, a first groove is provided on a side of the insert close to the second fixed mold core, and a second groove is provided on a side facing the second movable mold core; the first groove and the second groove are interconnected to form a V-shaped structure; The slider is provided with a third groove on the side close to the second fixed mold core for docking with the first groove, and a fourth groove on the side facing the second movable mold core for docking with the second groove; the third groove and the fourth groove are connected to each other and form a V-shaped structure; The edges of the first groove, the second groove, and the third groove and the fourth groove are all provided with serrated grooves.

[0013] In some embodiments, the insert is provided with a first exhaust groove respectively connected to the first groove and the second groove, and the slider is provided with a connecting groove connected to the third groove and the fourth groove, and a second exhaust groove connected to the third groove.

[0014] In some embodiments, the second movable mold core is provided with a through hole connected to the positioning cavity, the movable mold is provided with a suction cup quick-release assembly with one end arranged in the through hole and used to suck the skeleton, and an air path connected to the suction cup quick-release assembly.

[0015] In some embodiments, the second movable mold core is provided with a positioning groove for clamping the skeleton, and a clearance surface for avoiding the skeleton, the first fixed mold core, the second fixed mold core, the first movable mold core and the second movable mold core are respectively provided with cooling water channels, and the first movable mold core and the second movable mold core are respectively provided with demolding pin assemblies.

[0016] The beneficial effects of the technical solution provided by this application include: An embodiment of the present application provides a double-sided glue-coated mold for two-color injection molding production. Due to the mutually cooperating fixed mold and movable mold, a first cavity for molding a skeleton and a second cavity for glue-coating the molded skeleton are provided between the fixed mold and the movable mold. The second cavity includes a positioning cavity for positioning the skeleton, and an end glue-coating cavity connected to the positioning cavity and used for molding the end seal of the skeleton; an extension cavity for forming a glue-coating connection layer on the front and back sides of the skeleton is formed at the connection between the end glue-coating cavity and the positioning cavity, and the extension cavity includes a front-side glue-coating cavity and a back-side glue-coating cavity respectively located on the sides where the fixed mold and the movable mold are located.

[0017] Therefore, in the two-shot injection mold of this application, the first cavity for forming the skeleton and the second cavity for forming the seals at the skeleton ends are integrated into the same mold. Combined with the front-facing and back-facing cavities of the extended cavity, double-sided gluing of the skeleton is achieved within the same mold. In other words, the use of a common mold for the first and second cavities solves the process complexity associated with dual molds / dual machines, as well as the resource utilization of injection molding machines. This reduces mold development and production costs and improves product production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 A schematic cross-sectional view of a mold according to an embodiment of the present application; Figure 2 This is a cross-sectional schematic diagram of the cooperation between the second fixed mold core and the second movable mold core according to an embodiment of the present application; Figure 3 for Figure 2 A magnified schematic diagram of the local structure at point A; Figure 4 This is a schematic structural diagram of the second fixed mold core of an embodiment of the present application; Figure 5 This is a schematic structural diagram of the second movable mold core of an embodiment of the present application; Figure 6 Schematic diagram of the distribution of main gates in an embodiment of the present application; Figure 7 This is a schematic structural diagram of the first movable mold core of an embodiment of the present application; Figure 8 This is a schematic structural diagram of a suction cup quick-release assembly according to an embodiment of the present application; Figure 9 This is a schematic structural diagram of a slider and an inclined column according to an embodiment of the present application; Figure 10 This is a schematic diagram of the docking of the slider and the insert according to an embodiment of the present application; Figure 11 This is a schematic structural diagram of an insert according to an embodiment of the present application; Figure 12 This is a structural diagram of a slider according to an embodiment of the present application.

[0020] In the accompanying drawings, the components represented by the reference numerals are as follows: 1. Fixed mold; 2. Moving mold; 3. First cavity; 4. Second cavity; 41. Positioning cavity; 42. End-molding cavity; 43. Front-coating cavity; 44. Back-coating cavity; 5. First fixed mold core; 6. Second fixed mold core; 61. Clamping surface; 62. Glue groove; 63. Glue injection hole; 7. First moving mold core; 601. First clamping boss; 8. Second moving mold core; 801. Second clamping boss; 9. First main gate; 10. First hot runner plate; 11. First hot nozzle; 12. First pneumatic needle valve assembly; 13. Second main Gate; 14. Second hot runner plate; 15. Second hot nozzle; 16. Second pneumatic needle valve assembly; 17. Insert; 171. First groove; 172. Second groove; 173. First venting groove; 18. Slider; 181. Third groove; 182. Fourth groove; 183. Connecting groove; 184. Second venting groove; 19. Inclined column; 20. Serrated groove; 21. Through hole; 22. Suction cup quick-release assembly; 23. Air passage; 24. Positioning groove; 25. Air-avoiding surface; 26. Cooling water channel; 27. Ejector pin assembly; 100, frame; 200, seal. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0022] In response to the shortcomings or one of the shortcomings of the above-mentioned background technology, an embodiment of the present application provides a double-sided glued mold produced by two-color injection molding to solve the problems in the related technology that double-sided glued structural products require two molds / two machines for production, resulting in complex processes, high resource consumption, high costs and low production efficiency.

[0023] See also Figures 1 to 12 As shown, the embodiment of the present application provides a double-sided glue-coated mold produced by two-color injection molding, comprising: The fixed mold 1 and the movable mold 2 cooperate with each other. A first cavity 3 for molding the skeleton 100 and a second cavity 4 for encapsulating the molded skeleton 100 are provided between the fixed mold 1 and the movable mold 2. The second cavity 4 includes a positioning cavity 41 for positioning the skeleton 100 and an end encapsulation cavity 42 connected to the positioning cavity 41 and used to mold the end seal 200 of the skeleton 100. An extended cavity for forming an adhesive connection layer on the front and back sides of the skeleton 100 is formed at the connection between the end adhesive cavity 42 and the positioning cavity 41. The extended cavity includes a front covering cavity 43 and a back covering cavity 44 located on the sides of the fixed mold 1 and the movable mold 2 respectively.

[0024] The two-shot injection mold of the embodiment of the present application integrates the first cavity 3 for molding the skeleton 100 and the second cavity 4 for molding the end seal 200 of the skeleton 100 into the same mold. This, combined with the front-facing cladding cavity 43 and the back-facing cladding cavity 44 of the extended cavity, enables double-sided gluing of the skeleton 100 within the same mold. In other words, the use of a common mold for the first cavity 3 and the second cavity 4 solves the problem of complex processes caused by dual molds / dual machines, as well as the resource utilization of injection molding machines. This reduces mold development and production costs and improves product production efficiency.

[0025] Specifically, after the first mold closing, only the first cavity 3 is injected. After the injection is completed, the pressure is maintained, cooled, the mold is opened, and the mold is ejected. The skeleton 100 is grabbed by the robot device and placed in the second cavity 4. The mold is closed again, and then the first cavity 3 and the second cavity 4 are injected at the same time. After the injection is completed, the pressure is maintained, cooled, the mold is opened, and the mold is ejected. The robot device grabs the skeleton 100 of the first cavity 3 and the complete product of the second cavity 4, and then places the skeleton 100 into the second cavity 4. The complete product that has been grabbed is then moved to the designated placement area to complete the entire cycle, thereby realizing automated mass production.

[0026] During the overmolding injection molding of the second cavity 4, the soft rubber material can flow from the end overmolding cavity 42 to the front cladding cavity 43 and the back cladding cavity 44, forming an overmolding connection layer that facilitates the bonding of the front and back surfaces of the frame 100, effectively ensuring the bonding strength between the seal 200 and the end of the frame 100. For example, the thickness of the overmolding connection layer is not less than 0.5 mm and the width is 1.5 mm to 2 mm.

[0027] In some alternative embodiments: See Figures 1 to 12 As shown, the embodiment of the present application provides a double-sided gluing mold produced by two-color injection molding, wherein the fixed mold 1 of the double-sided gluing mold produced by two-color injection molding is provided with a first fixed mold core 5 and a second fixed mold core 6, and the movable mold 2 is provided with a first movable mold core 7 and a second movable mold core 8; The first fixed mold core 5 is provided with a first concave surface, and the first movable mold core 7 is provided with a first convex surface. The first concave surface and the first convex surface are aligned with each other to form a first cavity 3; The second fixed mold core 6 is provided with a second concave surface, and the second movable mold core 8 is provided with a second convex surface. The second concave surface and the second convex surface are aligned with each other to form a second cavity 4; A first glue-blocking boss 601 is provided on the second concave surface of the second fixed mold core 6. The first glue-blocking boss 601 is located at the end of the front covering cavity 43 away from the end covering cavity 42. A second glue-blocking boss 801 is provided on the second convex surface of the second movable mold core 8 . The second glue-blocking boss 801 is located at an end of the reverse covering cavity 44 away from the end covering cavity 42 .

[0028] The fixed mold 1 and the movable mold 2 of the embodiment of the present application achieve precise matching of the cavity through the matching structure of the first concave surface and the first convex surface, and the second concave surface and the second convex surface, which can ensure the uniformity of material flow and the stability of cavity closure during the molding process of the skeleton 100.

[0029] Specifically, the matching design of the concave and convex surfaces effectively prevents molding defects caused by mold misalignment during the injection molding process. During use, the movable mold 2 and the fixed mold 1 follow the concave and convex surfaces during injection molding. Through the geometric constraints of the mold cavity, the hard plastic material is accurately filled into the molding area of ​​the skeleton 100, while also providing a stable foundation for subsequent encapsulation.

[0030] In addition, a first glue-blocking boss 601 is protruded from the second concave surface of the second fixed mold core 6, and a second glue-blocking boss 801 is protruded from the second convex surface of the second movable mold core 8. The first glue-blocking boss 601 and the second glue-blocking boss 801 can clamp the skeleton when the mold is closed to prevent the molten soft glue from overflowing from the front-coating cavity 43 and the back-coating cavity 44 to form flash.

[0031] Specifically, when the overmolding is performed after the mold is closed, the molten soft glue flows from the end overmolding cavity 42 to the front coating cavity 43 and the back coating cavity 44. In order to prevent the soft glue from flowing to the fitting surface of the skeleton 100 and the mold core after the front coating cavity 43 and the back coating cavity 44 are filled to form flash defects, the first glue blocking boss 601 and the second glue blocking boss 801 are respectively provided at the edges of the front coating cavity 43 and the back coating cavity 44. The first glue blocking boss 601 and the second glue blocking boss 801 can effectively press the surface of the skeleton 100 to ensure that the skeleton 100 and the mold core surface are fitted and sealed, thereby preventing the soft glue from overflowing and ensuring the quality of the joint between the seal 200 and the skeleton 100.

[0032] Exemplarily, the first glue blocking boss 601 and the second glue blocking boss 801 have a height of 0.1 mm to 0.3 mm and a width of 2 to 5 mm, which can press the surface of the skeleton 100 when the mold is closed, so that the contact surface formed by the glue blocking boss and the mold core surface remains sealed.

[0033] It should be noted that since the skeleton 100 is not completely cooled until it is removed from the first cavity 3 and placed in the second cavity 4, the second cavity 4 must be designed with a certain shrinkage rate to ensure that the skeleton 100 can be placed properly. For example, based on the characteristics of the raw materials, the shrinkage rate of the first cavity 3 is 1.01, and the shrinkage rate of the second cavity 4 is 1.002 to 1.003.

[0034] In some alternative embodiments: See Figures 1 to 12 As shown, an embodiment of the present application provides a double-sided glue-coated mold produced by two-color injection molding. The second concave surface on the second fixed mold core 6 of the double-sided glue-coated mold produced by two-color injection molding includes a clamping surface 61 for cooperating with the second convex surface to clamp the skeleton 100. The clamping surface 61 is provided with a glue groove 62 connected to the end glue-coated cavity 42, and the glue groove 62 is provided with a glue injection hole 63 connected to the glue groove 62 at one end away from the end glue-coated cavity 42.

[0035] The second cavity 4 of the embodiment of the present application realizes the positioning of the skeleton 100 and the efficient transportation of the encapsulating material through the combined design of the clamping surface 61, the glue groove 62 and the glue injection hole 63. At the same time, the clamping surface 61 can reduce the positioning deviation of the skeleton 100 through the cooperation of the positioning column and the air-avoiding hole; the glue groove 62 is arranged on the clamping surface 61, which is convenient for the placement of the gate and the filling balance, and will not form a water gate on the molded seal 200. In addition, the extra features of the skeleton 100 do not affect the use and do not need to be removed in the post-process.

[0036] Specifically, after the clamping surface 61 cooperates with the second convex surface to clamp and position the frame 100, the injection hole 63 introduces the soft rubber material into the rubber groove 62, and then completes the injection molding of the double-sided seal 200 through the end rubber cavity 42. During use, the end rubber cavity 42 and the rubber groove 62 must be connected to form a complete flow channel after the mold is closed to ensure that the soft rubber material is evenly distributed and solidified at the end of the frame 100.

[0037] In some alternative embodiments: See Figures 1 to 12 As shown, an embodiment of the present application provides a double-sided glue-coated mold produced by two-color injection molding, wherein a second main gate 13 and a second hot runner plate 14 connected to the second main gate 13 are provided on the fixed mold 1 of the double-sided glue-coated mold produced by two-color injection molding, and a second hot runner plate 14 is connected to the second hot runner plate 14, one end of which extends into the second fixed mold core 6 and is connected to the glue injection hole 63, and a second pneumatic needle valve assembly 16 for controlling the opening and closing of the second hot nozzle 15.

[0038] The second mold cavity 4 of this embodiment achieves precise injection molding of soft rubber materials through the integrated design of the second main gate 13, second hot runner plate 14, second hot nozzle 15, and second pneumatic needle valve assembly 16. The second hot runner plate 14 maintains material temperature uniformity to prevent cold material blockage, while the second pneumatic needle valve assembly 16 reduces material waste and improves injection efficiency through real-time opening and closing control.

[0039] The second main gate 13 delivers the soft rubber material to the hot runner plate, and the second hot nozzle 15, under needle valve control, injects the material into the injection hole 63 of the second cavity 4. During use, the opening and closing timing of the second hot nozzle 15 is adjusted according to the encapsulation process parameters to ensure that the soft rubber material is quickly filled before it is completely cooled and forms a strong bond with the frame 100.

[0040] For example, in this embodiment, two second cavities 4 are provided between the fixed mold 1 and the movable mold 2, and each second cavity 4 is correspondingly provided with two second hot nozzles 15. The second hot runner plate 14 is respectively provided with a second branch channel and a second heating tube. The second main gate 13 is connected to the four second hot nozzles 15 through the second branch channel. The four second hot nozzles 15 are correspondingly provided with four second pneumatic needle valve assemblies 16, which can realize the simultaneous molding and injection of the seal 200 in the two second cavities 4.

[0041] In some alternative embodiments: See Figures 1 to 12 As shown, an embodiment of the present application provides a double-sided glue-coated mold produced by two-color injection molding, wherein the fixed mold 1 of the double-sided glue-coated mold produced by two-color injection molding is provided with a first main gate 9 and a first hot runner plate 10 connected to the first main gate 9, the first hot runner plate 10 is connected to a first hot nozzle 11 having one end extending into the first fixed mold core 5 and used for injecting glue into the first cavity 3, and a first pneumatic needle valve assembly 12 for controlling the opening and closing of the first hot nozzle 11.

[0042] The first mold cavity 3 of the present embodiment optimizes the molding quality of the hard plastic skeleton 100 through the coordinated design of the first main gate 9, the first hot runner plate 10, the first hot nozzle 11, and the first pneumatic needle valve assembly 12. Specifically, the first main gate 9 and the first hot runner plate 10 reduce material cooling losses and improve injection efficiency. The first pneumatic needle valve assembly 12 dynamically controls the injection volume, reducing the risk of shrinkage or deformation during the molding of the skeleton 100.

[0043] Specifically, the first main gate 9 delivers the hardened plastic material to the first hot runner plate 10. The first hot nozzle 11, under needle valve control, injects plastic into the first cavity 3, forming the main structure of the skeleton 100. During use, the hot nozzle's injection pressure and speed can be adjusted according to the thickness of the skeleton 100 to ensure sufficient material filling and rapid curing.

[0044] For example, in this embodiment, two first cavities 3 are arranged between the fixed mold 1 and the movable mold 2, and each first cavity 3 is correspondingly provided with a first hot nozzle 11. The first branch channel and the first heating tube are respectively provided on the first hot runner plate 10. The first main gate 9 is connected to the two first hot nozzles 11 through the first branch channel. The two first hot nozzles 11 are correspondingly provided with four first pneumatic needle valve assemblies 12, which can realize the simultaneous molding and injection of the skeleton 100 in the two first cavities 3. The spacing between the two first cavities 3 is the same as the spacing between the two second cavities 4, which is convenient for the robot to take the molded skeleton 100 out of the first cavity 3 and put it into the second cavity 4.

[0045] In some alternative embodiments: See Figures 1 to 12 As shown, the embodiment of the present application provides a double-sided glue-coated mold produced by two-color injection molding, wherein an insert 17 is provided on the second fixed mold core 6 of the double-sided glue-coated mold produced by two-color injection molding, and a long-side glue-coated cavity with a Y-shaped cross-section is formed between the insert 17, the second fixed mold core 6, and the second movable mold core 8; The movable mold 2 is symmetrically provided with sliders 18 at both ends of the insert 17, and the fixed mold 1 is symmetrically provided with inclined columns 19 for driving the sliders 18 on both sides to move closer to or away from each other; A short-side rubber-wrapped cavity with a Y-shaped cross-section is formed between the slider 18 , the second fixed mold core 6 , and the second movable mold core 8 . The long-side rubber-wrapped cavity and the short-side rubber-wrapped cavity together form an end rubber-wrapped cavity 42 .

[0046] In the embodiment of the present application, the second fixed mold core 6 and the second movable mold core 8 cooperate with the insert 17 and the slider 18 to form a Y-shaped cross-section with a long-side and a short-side rubber-encapsulated cavity, thereby achieving the complex structure of the end seal 200 of the frame 100. The Y-shaped cavity can accommodate the asymmetric geometry of the end seal 200 of the air conditioner intake damper, improving the sealing reliability of the damper's contact with the air duct sealing surface after bidirectional rotation.

[0047] Specifically, the combination of the insert 17 and the slider 18 allows the seal 200 to completely cover the outer edge of the frame 100 after molding. The outwardly forked Y-shaped seal 200 ensures that the air duct can be effectively sealed whether the damper is rotating forward or backward. During use, the upper inclined column 19 of the fixed mold 1 can be inserted and drive the slider 18, causing the slider 18 to move and mate with the end of the docking insert 17, ensuring that the long-side rubber-encapsulated cavity mates with the short-side rubber-encapsulated cavity, avoiding material accumulation or insufficient filling.

[0048] In some alternative embodiments: See Figures 1 to 12As shown, the embodiment of the present application provides a double-sided gluing mold produced by two-color injection molding, wherein the insert 17 of the double-sided gluing mold produced by two-color injection molding is provided with a first groove 171 on the side close to the second fixed mold core 6, and a second groove 172 on the side facing the second movable mold core 8; the first groove 171 and the second groove 172 are connected to each other and form a V-shaped structure; The slider 18 is provided with a third groove 181 on the side close to the second fixed mold core 6 for docking with the first groove 171, and a fourth groove 182 on the side facing the second movable mold core 8 for docking with the second groove 172; the third groove 181 and the fourth groove 182 are interconnected and form a V-shaped structure; The edges of the first groove 171 and the second groove 172 , as well as the third groove 181 and the fourth groove 182 are all provided with sawtooth grooves 20 .

[0049] The insert 17 and slider 18 of the present embodiment, through the V-shaped groove and serrated edge design, increase the structural complexity of the seal 200 at the end of the frame 100, thereby forming a seal 200 with a Y-shaped cross-section. The Y-shaped seal 200 enhances sealing performance, and the serrated groove 20 forms serrated protrusions on both edges of the seal 200, thereby improving the practicality of the seal 200.

[0050] Specifically, the soft rubber material diffuses along the V-shaped groove during the filling process and fills the serrated groove 20, thereby forming a seal 200 with a Y-shaped cross-section. At the same time, serrated protrusions are formed on the two edges. The serrated protrusions can scrape off attachments and keep the sealing surface clean during the rotation of the damper; at the same time, the sliding friction sweeping across the sealing surface can be reduced, making the damper open and close more smoothly, extending the life of the seal 200, and after the serrated protrusion is partially worn, the unworn serrations can still provide a certain seal, which is more durable than a straight edge.

[0051] In some alternative embodiments: See Figures 1 to 12 As shown, an embodiment of the present application provides a double-sided gluing mold produced by two-color injection molding, and the insert 17 of the double-sided gluing mold produced by two-color injection molding is provided with a first exhaust groove 173 respectively connected to the first groove 171 and the second groove 172, and the slider 18 is provided with a connecting groove 183 connecting the third groove 181 and the fourth groove 182, and a second exhaust groove 184 connecting the third groove.

[0052] The insert 17 and slider 18 of the present embodiment are interconnected through the first venting groove 173, the connecting groove 183, and the second venting groove 184, enabling rapid exhaust of gas within the mold cavity. The arrangement of the venting grooves reduces air bubbles and shrinkage defects caused by trapped air during the encapsulation process. The connecting groove 183 acts as an auxiliary flow channel to balance material filling pressure.

[0053] Specifically, the soft rubber material flows from the rubber groove 62 into the first groove 171 and the second groove 172, and then flows through the first groove 171 and the second groove 172 into the third groove 181 and the fourth groove 182, respectively, and merges at the connecting groove 183. At the same time, the gas is discharged along the first exhaust groove 173 and the second exhaust groove 184. During use, the size and position of the exhaust grooves can be verified during the mold debugging stage to ensure that there is no residual gas in the cavity that may affect the molding quality.

[0054] In some alternative embodiments: See Figures 1 to 12 As shown, an embodiment of the present application provides a double-sided gluing mold produced by two-color injection molding, wherein the second movable mold core 8 of the double-sided gluing mold produced by two-color injection molding is provided with a through hole 21 connected to the positioning cavity 41, and the movable mold 2 is provided with a suction cup quick-release assembly 22 with one end arranged in the through hole 21 and used to suck the skeleton 100, and an air path 23 connected to the suction cup quick-release assembly 22.

[0055] The second movable mold core 8 of the present embodiment integrates the suction cup quick-release assembly 22 and the air passage 23 to achieve rapid positioning of the frame 100 insert, preventing the frame 100 from falling off the second movable mold core 8 after placement. The suction cup quick-release assembly 22 provides suction force through the air passage 23, reducing manual operation time.

[0056] Specifically, after the second movable mold core 8 is placed on the frame 100, negative pressure is introduced into the air passage 23, causing the suction cup to absorb the frame 100 and fix its position, providing a reference for subsequent encapsulation. During use, the air passage opening and closing sequence must be preset in the injection molding machine control system to ensure that the frame 100 remains stable during the encapsulation stage and avoid displacement that may cause the encapsulation to dislocate.

[0057] Exemplarily, the suction cup quick-release assembly 22 includes a suction cup rod connected to the air channel 23 , an end of the suction cup rod away from the air channel 23 is threadedly connected to a suction cup insert, and a suction cup for adsorbing the skeleton 100 is installed at the end of the suction cup insert.

[0058] In some alternative embodiments: See Figures 1 to 12 As shown, an embodiment of the present application provides a double-sided gluing mold produced by two-color injection molding, wherein the second movable mold core 8 of the double-sided gluing mold produced by two-color injection molding is provided with a positioning groove 24 for clamping the skeleton 100, and a clearance surface 25 for avoiding the skeleton 100, and the first fixed mold core 5, the second fixed mold core 6, the first movable mold core 7 and the second movable mold core 8 are respectively provided with cooling water channels 26, and the first movable mold core 7 and the second movable mold core 8 are respectively provided with demolding ejector pin assemblies 27.

[0059] The second movable mold core 8 of this embodiment improves the consistency of double-sided gluing through the combined design of positioning grooves 24 and airtight surfaces 25, combined with cooling water channels 26 and demolding pin assemblies 27. The positioning grooves 24 ensure the precise alignment of the frame 100 insert within the gluing cavity, while the localized airtight surfaces 25 prevent excessive clamping contact during mold closing, which could damage the frame 100. The cooling water channels 26 accelerate material solidification, and the demolding pin assemblies 27 facilitate demolding of the frame 100.

[0060] Illustratively, the demolding ejector pin assembly 27 provided on the first movable mold core 7 and the second movable mold core 8 includes a plurality of ejector pins. The ejection contact points of the ejector pins on the first movable mold core 7 on the skeleton 100 coincide with the ejection contact points of the ejector pins on the second movable mold core 8 on the skeleton 100. At the same time, the diameter of the ejector pins on the second movable mold core 8 is smaller than the diameter of the ejector pins on the first movable mold core 7. The second ejection mark is located inside the first ejection mark, which can reduce the ejection mark and improve product quality.

[0061] It should be noted that since the skeleton 100 is placed as an insert in the overmolding cavity and then the mold is closed for overmolding and injection molding, the places where the skeleton 100 does not participate in the overmolding and sealing, that is, are not within the projection range of the overmolding, need to be protected from air, that is, an air-protection surface 25 is set to avoid crushing the skeleton 100 when the mold is closed.

[0062] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0063] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0064] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A double-sided glue-coated mold produced by two-color injection molding, characterized in that: include: A fixed mold (1) and a movable mold (2) cooperate with each other, wherein a first mold cavity (3) for molding a skeleton (100) and a second mold cavity (4) for encapsulating the molded skeleton (100) are provided between the fixed mold (1) and the movable mold (2), wherein the second mold cavity (4) includes a positioning cavity (41) for positioning the skeleton (100) and an end encapsulation cavity (42) communicated with the positioning cavity (41) and for molding an end seal (200) of the skeleton (100); An extension cavity for forming an adhesive connection layer on the front and back sides of the skeleton (100) is formed at the connection between the end rubber-coated cavity (42) and the positioning cavity (41), and the extension cavity includes a front-side coating cavity (43) and a back-side coating cavity (44) respectively located on the sides where the fixed mold (1) and the movable mold (2) are located.

2. The double-sided glue-coated mold produced by double-color injection molding according to claim 1, characterized in that: The fixed mold (1) is provided with a first fixed mold core (5) and a second fixed mold core (6), and the movable mold (2) is provided with a first movable mold core (7) and a second movable mold core (8); The first fixed mold core (5) is provided with a first concave surface, and the first movable mold core (7) is provided with a first convex surface, and the first concave surface and the first convex surface are aligned with each other to form a first cavity (3); The second fixed mold core (6) is provided with a second concave surface, and the second movable mold core (8) is provided with a second convex surface, and the second concave surface and the second convex surface are aligned with each other to form the second cavity (4); A first glue-blocking boss (601) is provided on the second concave surface of the second fixed mold core (6), and the first glue-blocking boss (601) is located at an end of the front coating cavity (43) away from the end coating cavity (42); A second glue-blocking boss (801) is provided on the second convex surface of the second movable mold core (8), and the second glue-blocking boss (801) is located at an end of the reverse covering cavity (44) away from the end covering cavity (42).

3. The double-sided glue-coated mold produced by double-color injection molding according to claim 2, characterized in that: The second concave surface on the second fixed mold core (6) includes a clamping surface (61) for cooperating with the second convex surface to clamp the skeleton (100), and the clamping surface (61) is provided with a glue groove (62) connected to the end glue-wrapped cavity (42), and the glue groove (62) is provided with a glue injection hole (63) connected to the glue groove (62) at one end away from the end glue-wrapped cavity (42).

4. The double-sided glue-coated mold produced by double-color injection molding according to claim 3, characterized in that: The fixed mold (1) is provided with a second main gate (13), and a second hot runner plate (14) connected to the second main gate (13); the second hot runner plate (14) is connected to a second hot nozzle (15) having one end extending into the second fixed mold core (6) and communicating with the injection hole (63); and a second pneumatic needle valve assembly (16) for controlling the opening and closing of the second hot nozzle (15).

5. The double-sided glue-coated mold produced by double-color injection molding according to claim 2, characterized in that: The fixed mold (1) is provided with a first main gate (9), and a first hot runner plate (10) connected to the first main gate (9); the first hot runner plate (10) is connected to a first hot nozzle (11) having one end extending into the first fixed mold core (5) and used for injecting glue into the first cavity (3); and a first pneumatic needle valve assembly (12) for controlling the opening and closing of the first hot nozzle (11).

6. The double-sided glue-coated mold produced by double-color injection molding according to claim 2, characterized in that: An insert (17) is provided on the second fixed mold core (6), and a long-side rubber-encapsulated cavity with a Y-shaped cross-section is formed between the insert (17), the second fixed mold core (6), and the second movable mold core (8); The movable mold (2) is symmetrically provided with sliders (18) located at both ends of the insert (17), and the fixed mold (1) is symmetrically provided with inclined columns (19) for driving the sliders (18) on both sides to move closer to or away from each other; A short-side rubber-wrapped cavity with a Y-shaped cross-section is formed between the slider (18), the second fixed mold core (6), and the second movable mold core (8); the long-side rubber-wrapped cavity and the short-side rubber-wrapped cavity together form the end rubber-wrapped cavity (42).

7. The double-sided glue-coated mold produced by double-color injection molding according to claim 6, characterized in that: The insert (17) is provided with a first groove (171) on a side close to the second fixed mold core (6), and a second groove (172) on a side facing the second movable mold core (8); the first groove (171) and the second groove (172) are interconnected to form a V-shaped structure; A third groove (181) for docking with the first groove (171) is provided on a side of the slider (18) close to the second fixed mold core (6), and a fourth groove (182) for docking with the second groove (172) is provided on a side facing the second movable mold core (8); the third groove (181) and the fourth groove (182) are interconnected to form a V-shaped structure; The edges of the first groove (171), the second groove (172), the third groove (181), and the fourth groove (182) are all provided with sawtooth grooves (20).

8. The double-sided coated mold produced by double-color injection molding according to claim 6 or 7, characterized in that: The insert (17) is provided with a first exhaust groove (173) respectively connected to the first groove (171) and the second groove (172), and the slider (18) is provided with a connecting groove (183) connected to the third groove (181) and the fourth groove (182), and a second exhaust groove (184) connected to the third groove.

9. The double-sided glue-coated mold produced by double-color injection molding according to claim 2, characterized in that: The second movable mold core (8) is provided with a through hole (21) communicating with the positioning cavity (41), and the movable mold (2) is provided with a suction cup quick-release assembly (22) having one end disposed in the through hole (21) and used to suck the skeleton (100), and an air passage (23) connected to the suction cup quick-release assembly (22).

10. The double-sided coated mold produced by double-color injection molding according to claim 2, characterized in that: The second movable mold core (8) is provided with a positioning groove (24) for clamping the frame (100), and a clearance surface (25) for avoiding the frame (100); the first fixed mold core (5), the second fixed mold core (6), the first movable mold core (7) and the second movable mold core (8) are respectively provided with a cooling water channel (26); the first movable mold core (7) and the second movable mold core (8) are respectively provided with a demoulding ejector pin assembly (27).

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