A hot plate welding device for automotive interior plastic panels

Abstract

The application discloses a hot plate welding device for automobile interior plastic plates and relates to the field of plastic plate processing, which comprises a welding machine body, a panel fixedly installed on one side of the welding machine body, a top plate movably installed above a workbench of the welding machine body, a bottom plate fixedly installed below the workbench of the welding machine body, a shaped base fixedly installed at the upper end center of the bottom plate and an installation plate fixedly installed at one side of the upper end of the bottom plate. The shovel blade in the shovel structure moves back and forth along the surface of the shaped base, automatically and continuously shoveling the flash, burrs and excess molten material on the plastic plate after hot plate welding, realizing integrated flow operation of welding and excess material cleaning, adjusting the horizontal parallelism of the blade, realizing multi-degree-of-freedom adjustment capability, and only by screwing off the installation screw, the old blade can be quickly taken off and a new blade can be installed, so that different shovel depths can be met.

Description

Technical Field

[0001] This invention relates to the field of plastic sheet processing, and in particular to a hot plate welding device for automotive interior plastic sheets. Background Technology

[0002] Hot plate welding equipment for automotive interior plastic sheets is a commonly used device in the production of automotive parts. Its working principle is to place the plastic sheet to be welded on the forming base and complete the welding by applying pressure through the heated top plate. It is widely used in the production and processing of various automotive interiors.

[0003] However, during use, protruding burrs, rough edges, and excess molten material often form at the edges and seams of the plastic sheets. Since the equipment lacks an automatic cleaning function, manual secondary finishing is required after welding the plastic sheets, increasing labor costs, disrupting production, and preventing integrated welding and cleaning operations. This results in longer processing cycles for individual products and lower automation and overall output efficiency. Secondly, automotive interior plastic sheets vary widely in thickness, bulge degree, and shape, commonly including flat, curved, stepped, and even asymmetrical structures. Existing scraping components are mostly fixed, unable to flexibly adjust the height, tilt angle, and horizontal parallelism of the scraping blades according to the actual shape of the workpiece. This makes it difficult for the blades to fully adhere to the workpiece surface, easily leading to uneven scraping, residual material, or damage to the substrate, severely restricting the equipment's process adaptability and processing quality. Furthermore, scraping blades are consumable parts and require regular replacement. In existing devices, the blades are often fixed to the mounting structure, requiring the disassembly of numerous related components for replacement. This process is cumbersome, time-consuming, and results in prolonged equipment downtime, increasing maintenance costs. Furthermore, it is impossible to adjust for different scraping depths using simple methods. In addition, during high-speed reciprocating scraping, the guide structure of existing devices is not perfect, easily causing radial swaying or skew, affecting the stability of the scraping trajectory. This leads to inconsistent surface quality of the finished product, resulting in defects such as scratches or wavy lines. Moreover, the heat and debris generated during scraping easily adhere to the blades, accelerating blade wear and polluting the working environment, while lacking effective cooling and cleaning measures. Summary of the Invention

[0004] The main objective of this invention is to provide a hot plate welding device for automotive interior plastic panels, which can effectively solve the technical problems mentioned in the background art.

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

[0006] A hot plate welding device for automotive interior plastic panels includes a welding machine body. A panel is fixedly installed on one side of the welding machine body. A top plate is movably installed above the worktable of the welding machine body. A base plate is fixedly installed below the worktable of the welding machine body. A forming base is fixedly installed at the center of the upper end of the base plate. An mounting plate is fixedly installed on one side of the upper end of the base plate. A motor is fixedly installed on one side of the mounting plate. A reciprocating structure with reciprocating drive is provided on the upper end of the base plate, located on the other side of the mounting plate. A mounting frame is installed on the upper end of the reciprocating structure. A first clamp is movably installed at the rear end of the mounting frame. A guide rail is fixedly installed at the rear of the upper end of the base plate. A slider is slidably installed on the upper end of the guide rail. A column is fixedly installed on the upper end of the slider. A screw is movably installed at the center of the column. A collar threaded to the screw is provided inside the column. An mounting sleeve movably engages with the collar is provided inside the column. A second clamp is movably installed at the front end of the mounting sleeve. A scraping structure for scraping operations is fixedly installed between the first clamp and the second clamp.

[0007] As a further embodiment of the present invention, the top plate is hydraulically driven to rise and fall around the main worktable of the welding machine, and the top plate is located above the forming base.

[0008] As a further embodiment of the present invention, the reciprocating structure includes a first pulley, a first bracket, a second bracket, a reciprocating screw, a second pulley, a transmission belt, and a sliding sleeve. The first pulley is fixedly installed at the end of the motor shaft, the first bracket and the second bracket are fixedly installed on the upper sides of the base plate, the reciprocating screw is rotatably installed between the first bracket and the second bracket, the second pulley is fixedly sleeved on one end of the reciprocating screw, the transmission belt is tautly sleeved on the outside of the second pulley and the first pulley, and the sliding sleeve is threaded on the outside of the reciprocating screw.

[0009] As a further embodiment of the present invention, the motor drives the reciprocating lead screw to rotate via a first pulley, a transmission belt, and a second pulley, and the sliding sleeve slides around the reciprocating lead screw.

[0010] As a further embodiment of the present invention, a guide sleeve is fixedly installed at the front end of the sliding sleeve, and a guide rod is fixedly installed at the front end of the first bracket and the second bracket, with the guide sleeve movably sleeved on the outside of the guide rod.

[0011] As a further embodiment of the present invention, the mounting bracket is fixedly mounted on the upper end of the sliding sleeve, and a fixing screw is fixedly mounted on the front end of the mounting bracket. The end of the fixing screw passes through the mounting bracket and is threadedly connected to the first clamp.

[0012] As a further embodiment of the present invention, a guide post is welded to the outer side of the collar and inserted into both sides of the mounting sleeve, and the mounting sleeve rotates around the guide post on the outer side of the collar through a slot.

[0013] As a further embodiment of the present invention, the scraping structure includes a mounting rod, mounting screws, scraping blades, and a washer. The mounting rod is fixedly installed between the first clamp and the second clamp, multiple mounting screws are fixedly installed on the upper end of the mounting rod, multiple scraping blades are located below the mounting rod, and the washer is placed on the upper end of the scraping blades.

[0014] As a further embodiment of the present invention, the end of the mounting screw passes downward through the mounting rod and the washer and is threadedly connected to the scraper blade, and the mounting screw tightens the scraper blade and fixes it to the mounting rod.

[0015] As a further embodiment of the present invention, the upper end of the mounting rod is inserted between multiple mounting screws and two extension brackets are fixedly installed at both ends of the extension brackets. A through nozzle is fixedly installed at the lower end of the extension brackets and a scraper blade is located above the molding base.

[0016] Compared with the prior art, the present invention has the following beneficial effects: by driving the reciprocating screw in the reciprocating structure by motor, the sliding sleeve makes a stable reciprocating linear motion, thereby causing the scraping blade in the scraping structure to move back and forth along the surface of the forming base, automatically and continuously removing the protruding flash, burrs and excess molten material on the plastic plate after hot plate welding. The whole process does not require manual intervention or machine stop operation, realizing the integrated assembly line operation of welding and waste material cleaning, significantly shortening the processing cycle of a single product, and improving the automation level of the production line and the overall output efficiency.

[0017] By increasing or decreasing the number of shims, the installation height of the scraper blade relative to the mounting rod can be precisely adjusted to match plastic sheets of different thicknesses or different degrees of bulge. The first clamp can rotate around the rear end of the mounting frame via a fixing screw, while the second clamp moves up and down and rotates within the column along with the mounting sleeve. The combined effect of these two mechanisms makes the overall tilt angle of the scraper blade adjustable. At the same time, rotating the screw can drive the collar to rise and fall, moving the mounting sleeve up and down to further fine-tune the horizontal parallelism of the blade, achieving multi-degree-of-freedom adjustment capabilities. This allows the device to easily handle complex shapes of interior plastic sheets such as curved, stepped, and asymmetrical surfaces, ensuring that the scraper blade always adheres to the workpiece surface for uniform and thorough removal of excess material.

[0018] The scraping blades are fixed to the mounting rods with mounting screws, and the gaskets are placed independently. When replacing them, you can quickly remove the old blades and install the new blades by simply unscrewing the mounting screws. There is no need to disassemble the entire scraping structure. The gaskets can also be added, removed or replaced individually to adapt to different scraping depth requirements. The modular design greatly simplifies the daily maintenance and consumable replacement process, and reduces equipment downtime and labor maintenance costs.

[0019] The guide sleeve, fixed at the front end of the sliding sleeve, is movably sleeved on the outside of the guide rod. The two ends of the guide rod are fixed on the first and second brackets respectively, forming a double guiding constraint, which effectively suppresses radial sway during reciprocating motion. The rear uses a guide rail and slider to cooperate, and the column slides smoothly on the guide rail through the slider, providing reliable tail support for the scraping structure. This ensures that the scraping blade always maintains a predetermined trajectory during high-speed reciprocating motion, avoiding deviation or shaking, thereby obtaining a stable and consistent scraping effect and ensuring the consistency of the surface quality of the finished product.

[0020] By installing two extension frames at the upper end of the mounting rod, with guide pipes fixed at both ends of the extension frames and through nozzles installed at the lower end of the guide pipes, the nozzles can be connected to compressed air or coolant to blow and cool down the surface of the plastic sheet or wash away debris during scraping operations. This prevents high-temperature residue from sticking to the blades, removes residual powder, improves the working environment, and extends the service life of the blades. Attached Figure Description

[0021] Figure 1 This is an overall structural diagram of a hot plate welding device for automotive interior plastic panels according to the present invention;

[0022] Figure 2 This is an enlarged view of the base plate in the hot plate welding device for automotive interior plastic panels according to the present invention;

[0023] Figure 3 This is a side view of the bottom plate in a hot plate welding device for automotive interior plastic panels according to the present invention.

[0024] Figure 4 This is an enlarged view of the sliding sleeve in the hot plate welding device for automotive interior plastic panels according to the present invention;

[0025] Figure 5 This is a cross-sectional view of the column in the hot plate welding device for automotive interior plastic panels according to the present invention.

[0026] Figure 6 This is a cross-sectional view of the scraping structure in the hot plate welding device for automotive interior plastic panels according to the present invention.

[0027] Figure 7 This is a bottom view of the mounting rod in the hot plate welding device for automotive interior plastic panels according to the present invention.

[0028] In the diagram: 1. Welding machine body; 2. Panel; 3. Top plate; 4. Bottom plate; 5. Forming base; 6. Mounting plate; 7. Motor; 8. Reciprocating structure; 9. First pulley; 10. First bracket; 11. Second bracket; 12. Reciprocating lead screw; 13. Second pulley; 14. Transmission belt; 15. Guide rod; 16. Sliding sleeve; 17. Guide sleeve; 18. Mounting bracket; 19. First clamp; 20. Fixing screw; 21. Guide rail; 22. Slider; 23. Column; 24. Screw; 25. Collar; 26. Mounting sleeve; 27. Second clamp; 28. Scraping structure; 29. ​​Mounting rod; 30. Mounting screw; 31. Scraping blade; 32. Gasket; 33. Extension frame; 34. Guide pipe; 35. Nozzle. Detailed Implementation

[0029] 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.

[0030] like Figures 1-7 As shown, a hot plate welding device for automotive interior plastic panels is described. Please refer to it for details. Figures 1-7 The system includes a welding machine body 1, a panel 2 fixedly mounted on one side of the welding machine body 1, a top plate 3 movably mounted above the worktable of the welding machine body 1, a base plate 4 fixedly mounted below the worktable of the welding machine body 1, a forming base 5 fixedly mounted at the upper center of the base plate 4, a mounting plate 6 fixedly mounted on one side of the upper end of the base plate 4, a motor 7 fixedly mounted on one side of the mounting plate 6, and a reciprocating structure 8 for reciprocating drive located on the upper end of the base plate 4 on the other side of the mounting plate 6. A mounting frame 18 is mounted on the upper end of the reciprocating structure 8, and the rear end of the mounting frame 18 is movably mounted on... The base plate 4 is equipped with a first clamping sleeve 19. A guide rail 21 is fixedly installed at the upper rear end of the base plate 4. A slider 22 is slidably installed at the upper end of the guide rail 21. A column 23 is fixedly installed at the upper end of the slider 22. A screw 24 is movably installed at the center of the column 23. A collar 25 is provided inside the column 23 and threadedly installed with the screw 24. An installation sleeve 26 is provided inside the column 23 and movably fitted with the collar 25. A second clamping sleeve 27 is movably installed at the front end of the installation sleeve 26. A scraping structure 28 for scraping operations is fixedly installed between the first clamping sleeve 19 and the second clamping sleeve 27.

[0031] Please refer to this carefully. Figure 1 The top plate 3 is hydraulically driven to rise and fall around the worktable of the welding machine body 1, and the top plate 3 is located above the forming base 5.

[0032] Specifically, when the device is running, the plastic plate to be welded is placed in the molding base 5 above the base plate 4. The welding machine body 1 is connected to an external power source and started by the switch on the panel 2. After the hydraulic system integrated in the welding machine body 1 is running, it drives the top plate 3 to move up and down, so that the welding head below the top plate 3 contacts the plastic plate in the molding base 5, and the plastic plate is welded by heating.

[0033] Please refer to this carefully. Figures 1-3 The reciprocating structure 8 includes a first pulley 9, a first bracket 10, a second bracket 11, a reciprocating screw 12, a second pulley 13, a transmission belt 14, and a sliding sleeve 16. The first pulley 9 is fixedly installed on the shaft end of the motor 7. The first bracket 10 and the second bracket 11 are fixedly installed on the upper sides of the base plate 4. The reciprocating screw 12 is rotatably installed between the first bracket 10 and the second bracket 11. The second pulley 13 is fixedly sleeved on one end of the reciprocating screw 12. The transmission belt 14 is tautly sleeved on the outside of the second pulley 13 and the first pulley 9. The sliding sleeve 16 is threaded on the outside of the reciprocating screw 12.

[0034] Please refer to this carefully. Figures 1-3 The motor 7 drives the reciprocating screw 12 to rotate through the first pulley 9, the transmission belt 14, and the second pulley 13, and the sliding sleeve 16 slides around the reciprocating screw 12.

[0035] Please refer to this carefully. Figures 1-3 A guide sleeve 17 is fixedly installed at the front end of the sliding sleeve 16, and a guide rod 15 is fixedly installed at the front end of the first bracket 10 and the second bracket 11. The guide sleeve 17 is movably sleeved on the outside of the guide rod 15.

[0036] Specifically, the guide sleeve 17 slides around the guide rod 15, which serves to position the sliding sleeve 16. The motor 7 is connected to the power supply of the welding machine body 1 and is controlled by the panel 2. When the motor 7 runs, it drives the reciprocating screw 12 to rotate through the first pulley 9, the transmission belt 14 and the second pulley 13. Therefore, the rotation of the reciprocating screw 12 drives the sliding sleeve 16 to perform reciprocating linear motion.

[0037] Please refer to this carefully. Figure 4 and Figure 5 The mounting bracket 18 is fixedly installed on the upper end of the sliding sleeve 16. A fixing screw 20 is fixedly installed on the front end of the mounting bracket 18. The end of the fixing screw 20 passes through the mounting bracket 18 and is threadedly connected to the first clamp 19.

[0038] Please refer to this carefully. Figure 4 and Figure 5 The outer side of the collar 25 is welded with guide posts and inserted into both sides of the mounting sleeve 26. The mounting sleeve 26 rotates around the outer guide posts of the collar 25 through the slot.

[0039] Specifically, the first clamp 19 can be installed at different angles at the rear end of the mounting bracket 18, and the second clamp 27 can also be installed at different angles. Then, the fixing screw 20 is tightened to fix it, so as to adjust the overall angle of the scraper blade 31 in the scraper structure 28. When the screw 24 is rotated, the collar 25 is driven to move up and down through the threaded connection. The collar 25 then drives the mounting sleeve 26 to move up and down within the column 23. At the same time, the mounting sleeve 26 rotates around the collar 25. With the change of the angle of the mounting sleeve 26, the first clamp 19 is also driven to rotate through the connection of the scraper structure 28, so as to adjust the overall parallel angle of the scraper blade 31 in the scraper structure 28.

[0040] Please refer to this carefully. Figure 6 and Figure 7 The scraping structure 28 includes a mounting rod 29, mounting screws 30, scraping blades 31, and a washer 32. The mounting rod 29 is fixedly installed between the first clamp 19 and the second clamp 27. Multiple mounting screws 30 are fixedly installed on the upper end of the mounting rod 29. Multiple scraping blades 31 are located below the mounting rod 29. The washer 32 is placed on the upper end of the scraping blades 31.

[0041] Please refer to this carefully. Figure 6 and Figure 7 The end of the mounting screw 30 passes downward through the mounting rod 29 and the washer 32 and is threaded to the scraper blade 31. The mounting screw 30 tightens the scraper blade 31 and fixes it to the mounting rod 29.

[0042] Please refer to this carefully. Figure 2 , Figure 3 , Figure 6 and Figure 7 The upper end of the mounting rod 29 is located between multiple mounting screws 30 and two extension brackets 33 are inserted. The two ends of the extension brackets 33 are fixedly installed with guide tubes 34. The lower end of the guide tubes 34 is fixedly installed with a through nozzle 35. The scraper blade 31 is located above the molding base 5.

[0043] Specifically, when the sliding sleeve 16 reciprocates, the mounting bracket 18 and the first clamp 19 drive the mounting rod 29 to reciprocate. At the same time, the slider 22 moves on the guide rail 21 for rear positioning, thus causing the scraper blade 31 below the mounting rod 29 to move back and forth. This allows the scraper blade 31 to scrape off the plastic plate welded to the hot plate above the molding base 5, removing the protruding excess material on the plastic plate. The scraper blade 31 can be disassembled and replaced by the detachable mounting screws 30. At the same time, the number of shims 32 can be increased or decreased to adjust the installation height of the scraper blade 31, realizing the modular installation of the scraper blade 31 for use with plastic plates of different shapes.

[0044] The end of the guide pipe 34 can be fitted with a pipe for compressed air or coolant. Compressed air or coolant is sprayed out from the nozzle 35 through the guide pipe 34, and the plastic sheet surface is blew and cooled or washed away with debris while the scraper blade 31 is scraping.

[0045] 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 hot plate welding device for automotive interior plastic panels, comprising a welding machine body (1), a panel (2) fixedly installed on one side of the welding machine body (1), a top plate (3) movably installed above the worktable of the welding machine body (1), a bottom plate (4) fixedly installed below the worktable of the welding machine body (1), and a forming base (5) fixedly installed at the upper center of the bottom plate (4), characterized in that: A mounting plate (6) is fixedly installed on one side of the upper end of the base plate (4), and a motor (7) is fixedly installed on one side of the mounting plate (6). A reciprocating structure (8) for reciprocating drive is provided on the upper end of the base plate (4) on the other side of the mounting plate (6). A mounting bracket (18) is installed on the upper end of the reciprocating structure (8). A first clamp (19) is movably installed on the rear end of the mounting bracket (18). A guide rail (21) is fixedly installed behind the upper end of the base plate (4), and a slider (22) is slidably installed on the upper end of the guide rail (21). A column (23) is fixedly installed at the upper end of the slider (22). A screw (24) is movably installed at the center of the column (23). A collar (25) threadedly installed with the screw (24) is provided inside the column (23). An installation sleeve (26) movably engages with the collar (25) is provided inside the column (23). A second clamp (27) is movably installed at the front end of the installation sleeve (26). A scraping structure (28) for scraping operations is fixedly installed between the first clamp (19) and the second clamp (27).

2. The hot plate welding device for automotive interior plastic panels according to claim 1, characterized in that: The top plate (3) is hydraulically driven to rise and fall around the worktable of the welding machine body (1), and the top plate (3) is located above the forming base (5).

3. The hot plate welding device for automotive interior plastic panels according to claim 1, characterized in that: The reciprocating structure (8) includes a first pulley (9), a first bracket (10), a second bracket (11), a reciprocating screw (12), a second pulley (13), a transmission belt (14), and a sliding sleeve (16). The first pulley (9) is fixedly installed on the shaft end of the motor (7). The first bracket (10) and the second bracket (11) are fixedly installed on both sides of the upper end of the base plate (4). The reciprocating screw (12) is rotatably installed between the first bracket (10) and the second bracket (11). The second pulley (13) is fixedly sleeved on one end of the reciprocating screw (12). The transmission belt (14) is tautly sleeved on the outside of the second pulley (13) and the first pulley (9). The sliding sleeve (16) is threaded on the outside of the reciprocating screw (12).

4. The hot plate welding device for automotive interior plastic panels according to claim 3, characterized in that: The motor (7) drives the reciprocating screw (12) to rotate through the first pulley (9), the transmission belt (14), and the second pulley (13), and the sliding sleeve (16) slides around the reciprocating screw (12).

5. The hot plate welding device for automotive interior plastic panels according to claim 3, characterized in that: The front end of the sliding sleeve (16) is fixedly installed with a guide sleeve (17), and the front ends of the first bracket (10) and the second bracket (11) are fixedly installed with guide rods (15). The guide sleeve (17) is movably sleeved on the outside of the guide rods (15).

6. The hot plate welding device for automotive interior plastic panels according to claim 3, characterized in that: The mounting bracket (18) is fixedly installed on the upper end of the sliding sleeve (16). A fixing screw (20) is fixedly installed on the front end of the mounting bracket (18). The end of the fixing screw (20) passes through the mounting bracket (18) and is threadedly connected to the first clamp (19).

7. The hot plate welding device for automotive interior plastic panels according to claim 1, characterized in that: The outer side of the collar (25) is welded with a guide post and inserted into both sides of the mounting sleeve (26). The mounting sleeve (26) rotates around the outer guide post of the collar (25) through the slot.

8. The hot plate welding device for automotive interior plastic panels according to claim 7, characterized in that: The scraping structure (28) includes a mounting rod (29), mounting screws (30), scraping blades (31) and a gasket (32). The mounting rod (29) is fixedly installed between the first sleeve (19) and the second sleeve (27). Multiple mounting screws (30) are fixedly installed on the upper end of the mounting rod (29). Multiple scraping blades (31) are located below the mounting rod (29). The gasket (32) is placed on the upper end of the scraping blades (31).

9. The hot plate welding device for automotive interior plastic panels according to claim 8, characterized in that: The end of the mounting screw (30) passes downward through the mounting rod (29) and the washer (32) and is threaded to the scraper blade (31). The mounting screw (30) tightens the scraper blade (31) and fixes it to the mounting rod (29).

10. The hot plate welding device for automotive interior plastic panels according to claim 1, characterized in that: The upper end of the mounting rod (29) is located between multiple mounting screws (30) and two extension brackets (33) are inserted. The two ends of the extension brackets (33) are fixedly installed with guide tubes (34). The lower end of the guide tubes (34) is fixedly installed with a through nozzle (35). The scraper blade (31) is located above the molding base (5).

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