Vacuum activated overmolding device for automotive interior plastic panels

Abstract

The application discloses a vacuum activation coating forming device for automobile interior plastic plates and relates to the field of plastic plate processing.The device comprises a base, a workbench fixedly arranged at the upper end of the base, a forming die fixedly arranged at the upper end of the workbench, support guide columns fixedly arranged at the upper end of the base, a top base movably arranged outside the support guide columns, telescopic motors fixedly arranged on the two sides of the top base, and a frame plate movably arranged below the top base outside the support guide columns.The device effectively avoids film material damage or uneven adhesion caused by rigid contact, greatly improves the consistency and yield of coating forming, keeps the coating film always stably maintained in the best activation temperature range, and actively manages heat to ensure that the film material always maintains high ductility and bonding activity before vacuum adsorption, so that the silica gel layer and the leather are uniformly and firmly hot-pressed and adhered on the whole coating interface.

Description

Technical Field

[0001] This invention relates to the field of plastic sheet processing, and in particular to a vacuum activation coating molding apparatus for automotive interior plastic sheets. Background Technology

[0002] The vacuum activation and coating molding device for automotive interior plastic panels is a device for bonding and molding the skin and skeleton of automotive interior plastic panels. It mainly involves initially covering the workpiece with a coating film, then using a heating device to soften the film, and finally completing the bonding through vacuum adsorption.

[0003] However, in existing devices, the top seat and frame plate are usually fixedly connected or can only be raised and lowered synchronously, making it impossible to independently adjust the distance between them. This makes it difficult to accurately control the downward pressure and coverage stroke of the coating film when coating workpieces of different thicknesses or complex curved surfaces. Rigid contact can easily lead to excessive local stress on the film material, causing damage, or uneven adhesion can result in wrinkles and bubbles, seriously affecting the consistency and yield of the coating process. Heating devices often use planar electric heating rods, where heat can only radiate unidirectionally from top to bottom. Since the edges of the coating film and workpiece are far from the heating center, the edge temperature is prone to being lower than the center temperature. The uneven temperature distribution at the core leads to inconsistent activation levels of the membrane material. The edge areas lack sufficient extensibility, making it difficult to tightly adhere to complex curved surfaces, while the central area may overheat and age, affecting adhesion strength and service life. Existing heating methods are mostly static radiation, lacking active airflow circulation. The preheating stage is time-consuming, and during continuous operation, the heat absorbed by the mold and the heat dissipated by the environment continuously remove heat from the membrane material, causing large temperature fluctuations and making it difficult to maintain a stable optimal activation temperature range. Due to insufficient temperature, the extensibility of the membrane material decreases, and it cannot be fully stretched during vacuum adsorption, resulting in poor coverage of complex contours and reduced adhesion. Summary of the Invention

[0004] The main objective of this invention is to provide a vacuum activation coating molding device for automotive interior plastic panels, which can effectively solve the problems mentioned in the prior art, such as the difficulty in accurately controlling the downward pressure and coverage stroke of the coating film, the uneven phenomenon of low edge temperature and excessive center temperature, and the difficulty in maintaining the optimal activation temperature range.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A vacuum activation coating molding device for automotive interior plastic panels includes a base, a worktable fixedly mounted at the upper center of the base, a forming mold fixedly mounted at the upper end of the worktable, support guide pillars fixedly mounted at the four corners of the upper end of the base, a top seat movably mounted on the outer side of the support guide pillars, telescopic motors fixedly mounted on both sides of the top seat, a frame plate movably mounted below the top seat on the outer side of the support guide pillars, a coating film fixedly mounted on the inner side of the frame plate, multiple fans fixedly mounted at the upper end of the top seat, multiple wire take-up devices fixedly mounted at the middle of the fans at the upper end of the top seat, and two mounting seats fixedly mounted on both inner walls of the top seat, with a heating structure for heating the coating film fixedly mounted between the two mounting seats.

[0007] As a further embodiment of the present invention, hydraulic rods are fixedly installed at both the front and rear ends of the top seat, and mounting plates are fixedly installed at both the front and rear ends of the upper end of the support guide column, with the upper end of the piston rod of the hydraulic rod being fixedly connected to the lower end of the mounting plate.

[0008] As a further embodiment of the present invention, the lower end of the telescopic rod of the telescopic motor is fixedly connected to both sides of the frame plate, and the frame plate and the covering film are located above the workbench and the forming mold.

[0009] As a further embodiment of the present invention, the hydraulic rod pushes and pulls the top seat up and down around the support guide column below the mounting plate. The top seat drives the frame plate to move up and down synchronously through the telescopic motor. The telescopic motor pushes and pulls the frame plate to change the distance between the frame plate and the top seat.

[0010] As a further embodiment of the present invention, the heating structure includes a mounting rod, a bearing seat, a sleeve, an electric heating rod, an insert rod, a connecting rod, and a lifting seat. Two mounting rods are respectively fixedly installed on one side of two mounting seats. The bearing seat is movably installed at both ends of the mounting rod. Multiple sleeves are disposed between the two bearing seats. The electric heating rod is fixedly installed at the bottom of the sleeve. Multiple insert rods are inserted between multiple sleeves. The connecting rod is fixedly installed on the outside of the insert rod. The lifting seat is fixedly installed at the upper end of the connecting rod.

[0011] As a further embodiment of the present invention, the end of the insertion rod is inserted into the sleeve for telescopic movement, the sleeves at both ends are fixedly connected to the shaft seat, and multiple sleeves are arranged in a row through the insertion rod, with the connecting rod sleeved on the outside of the front and rear insertion rods.

[0012] As a further embodiment of the present invention, a steel wire rope extends from the lower end of the take-up device, passes through the top of the top seat, and wraps around the guide wheel to connect with the lifting seat.

[0013] As a further embodiment of the present invention, the electric heating rod is located inside the lower part of the top seat, with the heating end of the electric heating rod facing the covering film.

[0014] As a further embodiment of the present invention, the top of the top seat is provided with an air inlet corresponding to the fan, and the fan blows air into the top seat through the air inlet.

[0015] As a further embodiment of the present invention, a panel is fixedly installed at the front end of the base, and the lower end of the support guide post is inserted into the interior of the base.

[0016] Compared with the prior art, the present invention has the following beneficial effects: by setting a telescopic motor to independently drive the frame plate to rise and fall along the support guide column, the distance between the top seat and the frame plate is dynamically adjustable. In the initial stage of wrapping, the top seat can be lowered by the hydraulic rod to initially cover the workpiece with the wrapping film. Then, the position of the frame plate can be precisely adjusted by the telescopic motor, which can ensure that the wrapping film fits tightly with the complex-shaped interior plastic panel skeleton, and can flexibly adjust the downward pressure and covering stroke according to the workpiece with different thickness or material. This effectively avoids the film material damage or uneven bonding caused by rigid contact, and greatly improves the consistency and yield of the wrapping molding.

[0017] By integrating a fan above the top seat and connecting it to the internal air inlet, a forced convection heat circulation system is constructed. The fan continuously delivers airflow downwards, which rapidly heats up after passing through the electric heating rod and is then blown directionally onto the coating film below. This not only significantly shortens the initial preheating time of the coating film but also continuously replenishes heat throughout the entire working process, offsetting the temperature loss caused by heat absorption by the mold or heat dissipation from the environment. This ensures that the coating film remains stably within the optimal activation temperature range. The active thermal management ensures that the film material maintains high extensibility and adhesive activity before vacuum adsorption, thereby significantly improving the coating integrity and adhesion of complex curved contours.

[0018] The heating structure, through the telescopic linkage design of the coil retractor, steel wire rope, connecting rod, and insert rod with the sleeve, achieves dynamic deformation of the electric heating rod from a horizontal straight state to an arc state. When the coil retractor tightens the steel wire rope, the array of electric heating rods arches upward, forming an arc-shaped heating surface that highly matches the outline of the interior plastic panel frame and the outer contour of the covering film. This contour-following heating method completely changes the shortcomings of traditional flat heaters, such as low edge temperature and overheating in the center. It allows heat to be evenly radiated to all parts of the workpiece from multiple angles and at equal distances, especially the sides and transition areas. This not only accelerates the overall heating rate but also eliminates local overheating or underheating, ensuring that the silicone layer and leather achieve uniform and firm heat-pressed bonding across the entire covering interface, ultimately presenting a superior appearance quality and durability. Attached Figure Description

[0019] Figure 1 This is an overall structural diagram of a vacuum activation coating molding device for automotive interior plastic panels according to the present invention;

[0020] Figure 2This is an enlarged view of the top seat in a vacuum activation coating molding device for automotive interior plastic panels according to the present invention;

[0021] Figure 3 This is an enlarged view of the base in a vacuum activation coating molding device for automotive interior plastic panels according to the present invention.

[0022] Figure 4 This is a cross-sectional view of the top seat in a vacuum activation coating molding device for automotive interior plastic panels according to the present invention.

[0023] Figure 5 This is a bending diagram of the insert rod and sleeve in a vacuum activation coating molding device for automotive interior plastic panels according to the present invention.

[0024] Figure 6 This is an enlarged view of the heating structure in a vacuum activation coating molding device for automotive interior plastic panels according to the present invention;

[0025] Figure 7 This is a partial structural diagram of the top seat in a vacuum activation coating molding device for automotive interior plastic panels according to the present invention.

[0026] In the diagram: 1. Base; 2. Workbench; 3. Forming mold; 4. Support guide column; 5. Mounting plate; 6. Hydraulic rod; 7. Top seat; 8. Telescopic motor; 9. Frame plate; 10. Covering film; 11. Cable take-up device; 12. Fan; 13. Mounting seat; 14. Heating structure; 15. Mounting rod; 16. Shaft seat; 17. Tube sleeve; 18. Electric heating rod; 19. Insert rod; 20. Connecting rod; 21. Lifting seat; 22. Steel wire rope; 23. Guide wheel; 24. Air inlet; 25. Panel. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0028] like Figures 1-7 As shown, a vacuum activation coating molding apparatus for automotive interior plastic panels is described. (See reference...) Figures 1-7 The system includes a base 1, a workbench 2 fixedly mounted at the upper center of the base 1, a forming mold 3 fixedly mounted at the upper end of the workbench 2, support guide pillars 4 fixedly mounted at the four corners of the upper end of the base 1, a top seat 7 movably mounted on the outer side of the support guide pillars 4, telescopic motors 8 fixedly mounted on both sides of the top seat 7, a frame plate 9 movably mounted on the outer side of the support guide pillars 4 below the top seat 7, a covering film 10 fixedly mounted on the inner side of the frame plate 9, multiple fans 12 fixedly mounted at the upper end of the top seat 7, multiple wire take-up devices 11 fixedly mounted at the middle of the fans 12 at the upper end of the top seat 7, and two mounting seats 13 fixedly mounted on both inner walls of the top seat 7, with a heating structure 14 for heating the covering film 10 fixedly mounted between the two mounting seats 13.

[0029] See Figure 1 and Figure 2 Hydraulic rods 6 are fixedly installed at both the front and rear ends of the top seat 7. Mounting plates 5 are fixedly installed at both the front and rear ends of the upper end of the support guide column 4. The upper end of the piston rod of the hydraulic rod 6 is fixedly connected to the lower end of the mounting plate 5.

[0030] See Figure 1 and Figure 2 The lower end of the telescopic rod of the telescopic motor 8 is fixedly connected to both sides of the frame plate 9. The frame plate 9 and the covering film 10 are located above the workbench 2 and the forming mold 3.

[0031] See Figure 1 and Figure 2 The hydraulic rod 6 pushes and pulls the top seat 7 below the mounting plate 5 to rise and fall around the support guide column 4. The top seat 7 drives the frame plate 9 to rise and fall synchronously through the telescopic motor 8. The telescopic motor 8 pushes and pulls the frame plate 9 to change the distance between it and the top seat 7.

[0032] Specifically, the operation of the hydraulic rod 6 causes the piston rod to extend, and then the mounting plate 5 pushes the top seat 7 to descend around the support guide column 4. The top seat 7 also drives the frame plate 9 to descend at the same time. The synchronous operation of the two telescopic motors 8 causes the telescopic rod to extend, and then pushes and pulls the frame plate 9 to rise and fall around the support guide column 4, changing the distance between it and the top seat 7. After the telescopic motors 8 run, they self-lock to position the push-pull frame plate 9.

[0033] See Figures 4-6 The heating structure 14 includes a mounting rod 15, a bearing 16, a sleeve 17, an electric heating rod 18, an insert rod 19, a connecting rod 20, and a lifting seat 21. The two mounting rods 15 are fixedly installed on one side of the two mounting seats 13 respectively. The bearing 16 is movably installed at both ends of the mounting rod 15. Multiple sleeves 17 are arranged between the two bearing seats 16. The electric heating rod 18 is fixedly installed at the bottom of the sleeve 17. Multiple insert rods 19 are inserted between the multiple sleeves 17. The connecting rod 20 is fixedly installed on the outside of the insert rod 19. The lifting seat 21 is fixedly installed on the upper end of the connecting rod 20.

[0034] See Figures 4-6 The end of the insertion rod 19 is inserted into the sleeve 17 and moves in a telescopic manner. The sleeves 17 at both ends are fixedly connected to the bearing 16. Multiple sleeves 17 are arranged in a row through the insertion rod 19. The connecting rod 20 is sleeved on the outside of the front and rear insertion rods 19.

[0035] See Figures 4-6 A steel wire rope 22 extends from the lower end of the take-up device 11, passes through the top of the top seat 7, and wraps around the guide wheel 23 to connect with the lifting seat 21.

[0036] Specifically, when the retractor 11 is running, it can pull the steel wire rope 22 to retract and extend. When the steel wire rope 22 is retracted, the steel wire rope 22 pulls the connecting rod 20 upward through the lifting seat 21. The connecting rod 20 then pulls the insert rod 19 upward. Through the elastic deformation of the insert rod 19, multiple insert rods 19 and the sleeve 17 deform upward in an arc shape, so that when the electric heating rod 18 heats the covering film 10, it is arranged in an arc shape on the outside of the covering film 10 and the interior plastic panel.

[0037] See Figures 4-6 The electric heating rod 18 is located inside the bottom of the top seat 7, with the heating end of the electric heating rod 18 facing the covering film 10.

[0038] See Figure 7 The top of the top seat 7 is provided with an air inlet 24 corresponding to the fan 12, and the fan 12 blows air into the top seat 7 through the air inlet 24.

[0039] Specifically, the operation of the fan 12 blows air downwards towards the top seat 7, and then the air carries the heat emitted by the electric heating rod 18 and blows it towards the covering membrane 10 to preheat the covering membrane 10.

[0040] See Figure 1 and Figure 3 A panel 25 is fixedly installed at the front end of the base 1, and the lower end of the support guide post 4 is inserted into the interior of the base 1.

[0041] The principle of the vacuum activation coating molding device for automotive interior plastic panels of the present invention is as follows: The device is connected to an external power source to power the electrical components, and the hydraulic rod 6 is connected to an external hydraulic pump to provide power. The overall operation of the device is controlled by the panel 25. The interior plastic panel skeleton and skin to be molded are placed on the forming mold 3 on the workbench 2. After the device is running, the piston rod of the hydraulic rod 6 extends, and then the top seat 7 of the mounting plate 5 is pushed down around the support guide column 4, which also drives the frame plate 9 down. First, the coating film 10 covers the exterior of the interior plastic panel skeleton and skin. The air extraction system integrated in the base 1 extracts the air outside the forming mold 3, so that the coating film 10 forms a vacuum negative pressure to wrap the interior plastic panel skeleton and skin. Then the top seat 7 descends again to fit with the frame plate 9. Then the electric heating rod 18 generates resistance heating and releases heat to the coating film 10 and the skeleton and skin of the interior plastic panel, so that the silicone layer is pressed tightly against the leather for full adhesion, completing the molding process of the interior plastic panel.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A vacuum activation coating molding device for automotive interior plastic panels, comprising a base (1), a worktable (2) fixedly mounted at the upper center of the base (1), a forming mold (3) fixedly mounted at the upper end of the worktable (2), and support guide posts (4) fixedly mounted at the four corners of the upper end of the base (1), characterized in that: A top seat (7) is movably installed on the outer side of the support guide column (4). Telescopic motors (8) are fixedly installed on both sides of the top seat (7). A frame plate (9) is movably installed on the outer side of the support guide column (4) below the top seat (7). A covering film (10) is fixedly installed on the inner side of the frame plate (9). Multiple fans (12) are fixedly installed on the upper end of the top seat (7). Multiple wire take-up devices (11) are fixedly installed on the upper end of the top seat (7) in the middle of the fans (12). Two mounting seats (13) are fixedly installed on both inner walls of the top seat (7). A heating structure (14) for heating the covering film (10) is fixedly installed between the two mounting seats (13).

2. The vacuum activation coating molding apparatus for automotive interior plastic panels according to claim 1, characterized in that: Hydraulic rods (6) are fixedly installed at both the front and rear ends of the top seat (7), and mounting plates (5) are fixedly installed at both the front and rear ends of the upper end of the support guide column (4). The upper end of the piston rod of the hydraulic rod (6) is fixedly connected to the lower end of the mounting plate (5).

3. The vacuum activation coating molding apparatus for automotive interior plastic panels according to claim 1, characterized in that: The lower end of the telescopic rod of the telescopic motor (8) is fixedly connected to both sides of the frame plate (9), and the frame plate (9) and the covering film (10) are located above the workbench (2) and the forming mold (3).

4. The vacuum activation coating molding apparatus for automotive interior plastic panels according to claim 1, characterized in that: The hydraulic rod (6) pushes and pulls the top seat (7) below the mounting plate (5) to rise and fall around the support guide column (4). The top seat (7) drives the frame plate (9) to rise and fall synchronously through the telescopic motor (8). The telescopic motor (8) pushes and pulls the frame plate (9) to change the distance between it and the top seat (7).

5. The vacuum activation coating molding apparatus for automotive interior plastic panels according to claim 1, characterized in that: The heating structure (14) includes a mounting rod (15), a bearing seat (16), a sleeve (17), an electric heating rod (18), an insert rod (19), a connecting rod (20), and a lifting seat (21). The two mounting rods (15) are fixedly installed on one side of the two mounting seats (13), the bearing seat (16) is movably installed at both ends of the mounting rod (15), multiple sleeves (17) are arranged between the two bearing seats (16), the electric heating rod (18) is fixedly installed at the bottom of the sleeve (17), multiple insert rods (19) are inserted between the multiple sleeves (17), the connecting rod (20) is fixedly installed on the outside of the insert rod (19), and the lifting seat (21) is fixedly installed at the upper end of the connecting rod (20).

6. The vacuum activation coating molding apparatus for automotive interior plastic panels according to claim 5, characterized in that: The end of the insert (19) is inserted into the sleeve (17) and moves in a telescopic manner. The sleeves (17) at both ends are fixedly connected to the bearing (16). Multiple sleeves (17) are arranged in a row through the insert (19). The connecting rod (20) is sleeved on the outside of the front and rear inserts (19).

7. The vacuum activation coating molding apparatus for automotive interior plastic panels according to claim 5, characterized in that: A steel wire rope (22) extends from the lower end of the take-up device (11), passes through the top of the top seat (7), and wraps around the guide wheel (23) to connect with the lifting seat (21).

8. The vacuum activation coating molding apparatus for automotive interior plastic panels according to claim 1, characterized in that: The electric heating rod (18) is located inside the bottom of the top seat (7), with the heating end of the electric heating rod (18) facing the covering film (10).

9. The vacuum activation coating molding apparatus for automotive interior plastic panels according to claim 5, characterized in that: The top of the top seat (7) is provided with an air inlet (24) corresponding to the fan (12), and the fan (12) blows air into the top seat (7) through the air inlet (24).

10. The vacuum activation coating molding apparatus for automotive interior plastic panels according to claim 1, characterized in that: A panel (25) is fixedly installed at the front end of the base (1), and the lower end of the support guide post (4) is inserted into the interior of the base (1).

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