Automatic hemming machine for face frame parting surface

Abstract

The application relates to the field of automatic processing equipment for injection molding parts, in particular to a face frame parting surface automatic edging machine which comprises a rack, a workpiece bearing table, a plurality of linear drive units, an edging structure and a control system. The control system cooperatively controls the plurality of linear drive units to drive the processing head on the edging structure to move along a preset track, and automatic edging is realized. The workpiece bearing table is cooperatively designed with a clamping structure, only supports and presses the inner side of the workpiece, and leaves a non-interference processing path for the processing head. The edging structure integrates a telescopic assembly with a flexible compensation function and a temperature-controlled heating processing head, and efficiently removes burrs in a constant-pressure lamination and hot-melt rolling mode. Through automatic operation, the application significantly improves production efficiency and processing quality, and reduces production cost and safety risk.

Description

Technical Field

[0001] This utility model relates to the field of automated processing equipment for injection molded parts, and in particular to an automatic edge rolling machine for the parting surface of a face frame. Background Technology

[0002] With the widespread adoption of ultra-thin display devices such as LCD and OLED TVs, plastic bezels have become the mainstream material for TV bezels due to their advantages such as lightweight, low cost, and good formability. However, during the injection molding process, defects such as burrs and flash are easily generated on the parting surface (i.e., the mold closing surface) of plastic bezels. These burrs not only affect the appearance quality of the bezel but may also lead to assembly difficulties, poor sealing, and even scratches on the user's fingers during use. Therefore, burrs must be precisely removed in subsequent processes.

[0003] Currently, the mainstream deburring methods in the industry still heavily rely on manual operation, that is, workers use tools such as trimming knives and sandpaper to grind and scrape the workpieces one by one. This traditional operation method is not only inefficient and costly, but also has the problem of inconsistent processing quality. In addition, the long-term use of sharp tools by workers also poses certain operational safety risks.

[0004] Based on the above, this application proposes an automatic edge rolling machine for the parting surface of a face frame, which can effectively solve the above problems. Utility Model Content

[0005] To address the problems of low efficiency, high cost, and poor quality consistency in manual deburring operations in existing technologies, this application proposes an automatic edge rolling machine for the parting surface of a frame.

[0006] An automatic edge-rolling machine for parting surfaces of face frames includes: frame; The workpiece support platform is mounted on the frame and is configured to support only the inner portion of the lower bottom surface of the workpiece when carrying it. Linear drive unit mounted on the frame; A rolling edge structure, wherein the rolling edge structure is disposed on a plurality of the linear drive units, and the rolling edge structure includes a processing head for hot-melt rolling of the outer edge of the workpiece; and A control system configured to collaboratively control multiple linear drive units to drive the processing head to move along a preset trajectory.

[0007] By setting up multiple linear drive units and using a control system to coordinate their movement, the machining head achieves multi-degree-of-freedom spatial movement, enabling it to replace manual operation and move precisely along the preset trajectory of the workpiece parting surface. This achieves automated burr removal, which not only improves production efficiency and processing accuracy but also reduces labor costs and eliminates the safety risks of manual operation.

[0008] In one embodiment, the workpiece support platform is configured to support only the inner part of the bottom surface of the workpiece when carrying the workpiece, so that the outer edge area of ​​the workpiece that needs to be rolled is suspended in the air, leaving sufficient space for the processing head of the rolling structure to move, thereby avoiding interference between the processing head and the workpiece support platform when rolling the parting surface of the workpiece.

[0009] In one embodiment, the hemming structure further includes a telescopic component disposed on the linear drive unit. The telescopic component includes a small cylinder and a guide rail slider. The telescopic component is configured to drive the guide rail slider to move under the drive of the small cylinder. This not only facilitates the replacement of workpieces, but also provides the processing head with a flexible compensation function through the cooperation of the small cylinder and the guide rail slider. That is, by precisely controlling the air pressure, the roller is always in contact with the processed surface with a constant pressure, ensuring the uniformity of the hemming effect.

[0010] In one embodiment, the processing head is connected to a guide rail slider. The processing head, arranged sequentially along the heat transfer path, includes a heat insulation block, a heating block, heat transfer guide pins, and a roller disposed at the end of the heat transfer guide pins. Heat is generated by the heating block and transferred to the roller at the end via the heat transfer guide pins, maintaining the roller at a specific temperature that softens plastic burrs without damaging the workpiece. When the high-temperature roller rolls and contacts the burr, it effectively heat-melts and flattens it, integrating it into the workpiece edge, achieving a highly efficient deburring effect. The heat insulation block effectively prevents heat from being conducted to precision components such as the telescopic assembly and linear drive unit, protecting the equipment and ensuring its long-term stable operation.

[0011] In one embodiment, the processing head is a temperature-controlled roller assembly, which includes a hollow roller and a built-in heating element disposed inside the roller. The roller rotates around a fixed central support shaft, and the built-in heating element passes through and is fixed to the central support shaft. The built-in heating element is configured to directly heat the inner wall of the roller. This direct internal heating method achieves rapid and precise temperature control of the roller.

[0012] Preferably, the built-in heating core is a ceramic heating rod, which has the characteristics of rapid heating and good insulation, and can further improve heating efficiency and the overall compactness of the processing head.

[0013] Preferably, to achieve precise control of the rolling temperature, the processing head further includes a temperature sensor. This temperature sensor is positioned close to the working surface of the roller to monitor the roller temperature in real time and feed its measurement signal back to the equipment's control system.

[0014] In one embodiment, the workpiece is the bezel of a display, and there are four linear drive units arranged in a rectangular array. The four edge-rolling structures are respectively connected to the four linear drive units and configured to synchronously perform hot-melt rolling on the four outer edges of the workpiece. The rectangular array of the four linear drive units forms a stable and reliable coordinate motion system, which facilitates precise control and path planning by the control system, thereby driving the edge-rolling structures to perform edge-rolling processing on the workpiece.

[0015] In one embodiment, a positioning component is also provided on the workpiece support platform. The positioning component is configured to perform preliminary positioning of the workpiece. The positioning component is a negative pressure adsorption device, which includes multiple air holes, air pipes, and an air pump connected to the air pipes on the workpiece support platform. When the workpiece is placed on the workpiece support platform, the air pump draws air to quickly adsorb the workpiece and pull it toward the positioning reference, achieving rapid and stable preliminary positioning. Moreover, the adsorption force is evenly distributed, making it less likely to cause deformation of the injection molded workpiece.

[0016] In one embodiment, a clamping structure is further included, configured to press the workpiece firmly against the workpiece support table after initial positioning. After initial positioning, the clamping structure firmly secures the workpiece, effectively resisting the forces exerted on the workpiece by the machining head during processing and preventing any minor displacement or vibration of the workpiece during machining.

[0017] In one embodiment, the clamping structure only presses against the inner portion of the upper surface of the workpiece, and works in conjunction with the workpiece support platform to reserve an interference-free machining path for the machining head in the outer edge region of the workpiece. Through the coordinated design of the clamping structure and the workpiece support platform, the upper and lower clamping of the inner region of the workpiece is achieved, while the entire outer edge machining area is completely exposed, fundamentally solving the motion interference problem between the fixture and the machining head.

[0018] In one embodiment, the clamping structure includes multiple product clamps, each disposed on one side of the workpiece support platform. Each clamp includes multiple flipping rods and a pressure plate connected to the flipping rods. The pressure plate is configured to clamp and fix the workpiece vertically as the flipping rods move when the workpiece is positioned. The structural design of the flipping rods and pressure plate allows the clamping structure to flip to an avoidance position when not in operation, facilitating workpiece loading and unloading. During operation, it can quickly flip to apply a stable clamping force to the workpiece.

[0019] The automatic edge rolling machine for the parting surface of the face frame provided in this application can achieve the following technical effects: By setting up multiple linear drive units that are coordinated and controlled by the control system, the processing head is driven to move precisely along the preset trajectory of the workpiece parting surface, realizing the full automation of the hemming process and improving production efficiency.

[0020] The workpiece is quickly and initially positioned by a negative pressure adsorption device, and then a flip-up clamping structure is used to fasten the workpiece a second time, ensuring the stability of the workpiece during the processing.

[0021] By coordinating the design of the workpiece support platform and the product fixture, the entire outer edge area of ​​the workpiece to be processed is completely suspended and exposed, fundamentally avoiding motion interference and ensuring smooth and safe operation of the equipment.

[0022] By equipping the processing head with flexible telescopic components and heated rollers, constant pressure adaptive bonding and efficient hot melt rolling of the workpiece parting surface are achieved, ensuring the uniformity and excellence of the deburring effect. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an automatic rolling edge machine for parting surfaces provided in an embodiment of this application.

[0024] Figure 2 This is a schematic diagram of the edge-rolling structure in an automatic edge-rolling machine for parting surfaces provided in the first embodiment of this application.

[0025] Figure 3 This is a cross-sectional schematic diagram of the processing head in an automatic rolling machine for parting surfaces provided in the second embodiment of this application.

[0026] Figure 4 This is a schematic diagram of a positioning component in an automatic rolling machine for parting surfaces provided in an embodiment of this application.

[0027] Figure 5 This is a schematic diagram of the clamping structure in an automatic rolling machine for parting surfaces provided in an embodiment of this application.

[0028] Explanation of reference numerals in the attached figures: 1. Frame; 11. Workpiece; 12. Casters; 2. Workpiece support platform; 21. Positioning assembly; 211. Air vent; 212. Air pipe; 213. Air pump; 3. Linear drive unit; 31. Motor; 32. Slide table; 321. Guide rail; 4. Heating structure; 41. Processing head; 411. Heat insulation block; 412. Heating block; 413. Heat transfer guide pin; 414. Roller; 415. Built-in heating core; 416. Temperature sensor; 417. Central support shaft; 42. Telescopic assembly; 421. Small cylinder; 422. Guide rail slider; 5. Control system; 6. Clamping structure; 61. Product clamp; 611. Tilting rod; 612. Pressure plate. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0030] Example 1 Please see Figure 1-2 as well as Figure 4-5 This application discloses an automatic edge rolling machine for face frame parting surfaces, which mainly includes: a frame 1, a workpiece support platform 2, a linear drive unit 3, an edge rolling structure 4, and a control system 5. The edge rolling structure 4 includes a processing head 41.

[0031] In this embodiment, the frame 1 provides a basic installation and support platform for the equipment. A workpiece support platform 2 is provided in the central area of ​​the frame 1 to support the TV frame workpiece 11 to be processed, and casters 12 are provided at the bottom of the frame 1.

[0032] Specifically, the cross-sectional design of the workpiece support platform 2 is preferably an outward-facing L-shaped structure with a hollow interior. This L-shaped structure includes a horizontal side and a vertical side. When the workpiece 11 is placed on the workpiece support platform 2, the lower surface of the workpiece 11 is supported by the horizontal side, while the inner sidewall of the workpiece 11 abuts against the vertical side. To achieve interference-free movement of the processing head 41 in the outer edge region of the workpiece 11, the horizontal side of the workpiece support platform 2 does not completely cover the lower surface of the workpiece 11, but only supports the inner part of its lower surface, specifically from one-half to two-thirds of the area measured from the inner edge, leaving the outer edge of the workpiece 11 suspended.

[0033] In this embodiment, the processing action is jointly performed by four linear drive units 3 mounted on the frame 1 and a rolling structure 4 mounted on top of the linear drive units 3. The four linear drive units 3 are arranged in a rectangular array on the frame 1, corresponding to the four sides of the workpiece 11. Each linear drive unit 3 is driven by an independent motor 31, which in this embodiment is specifically a linear module, including a slide 32 that can move along a preset axis (e.g., the X-axis or the Y-axis). The control system 5 can coordinately control these four motors 31 to drive the four slides 32 to move precisely, thereby driving the rolling structure 4 on them to synchronously perform rolling operations along the four outer edges of the TV frame.

[0034] In this embodiment, each hemming structure 4 includes a telescopic component 42. The telescopic component 42 enables the processing head 41 to have flexible compensation and forward / backward functions.

[0035] Specifically, each linear drive unit 3 has a short guide rail 321 on its slide 32. The telescopic assembly 42 includes a small cylinder 421 and a guide rail slider 422. The guide rail slider is connected to the piston rod of the small cylinder 421, and the bottom of the guide rail slider 422 fits into the guide rail 321. When edge rolling is required, the control system 5 controls the small cylinder 421 to move, pushing the entire edge rolling structure 4 forward along the guide rail 321 to a preset processing position. After edge rolling is completed, the small cylinder 421 moves in the opposite direction to retract the edge rolling structure 4, facilitating the replacement of the workpiece 11. At the same time, by precisely controlling the air pressure of the small cylinder 421, the processing head 41 can be made to adhere to the surface of the workpiece 11 with a constant pressure, effectively compensating for any minor dimensional and positional tolerances that may exist in the workpiece 11, and ensuring a uniform edge rolling effect.

[0036] In this embodiment, the processing head 41 is responsible for heating and rolling the parting surface of the workpiece 11. Its structure, arranged according to the heat transfer path, is as follows: a double-layer heat insulation block 411 is connected to the front end of the guide rail slider 422 of the telescopic assembly 42 to effectively prevent heat from being conducted to precision components such as the cylinder and guide rail 321, thus protecting the equipment. A heating block 412 is connected to the heat insulation block 411 as a heat source. The heating block 412 is vertically connected to a roller 414 via a heat transfer guide pin 413. The size of the roller 414 matches the contour of the side of the workpiece 11, allowing it to directly contact and roll the burrs on the workpiece 11. To achieve precise temperature control, the heat transfer guide pin 413 is equipped with a thermocouple to monitor the temperature near the roller 414 in real time and feed the temperature signal back to the control system 5. The control system 5 adjusts the power of the heating block 412 to precisely maintain the temperature of the roller 414 within a process temperature range that softens the plastic burrs without damaging the workpiece 11.

[0037] In this embodiment, the workpiece support platform 2 is also provided with a negative pressure adsorption device as a positioning component 21, including a plurality of air holes 211 opened on the workpiece support platform 2, an air pipe 212 for connecting the air holes 211, and an air pump 213 connected to the air pipe 212.

[0038] Specifically, multiple air holes 211 are formed on the side wall of the L-shaped vertical edge of the workpiece support platform 2. These air holes 211 are connected to an air pump 213 located inside the frame 1 via air pipes 212 disposed inside the hollow interior of the workpiece support platform 2. When the workpiece 11 is placed on the support platform, the control system 5 starts the air pump 213 to extract air, creating negative pressure at the air holes 211, thereby firmly adsorbing the workpiece 11 onto the support platform and pulling it towards the positioning reference, completing the initial positioning. This adsorption method provides rapid positioning and uniform force distribution, effectively avoiding deformation damage to the workpiece 11.

[0039] In this embodiment, to resist the force exerted on the workpiece 11 by the processing head 41 during the hemming process and to prevent the workpiece 11 from shifting or vibrating, this application also includes a clamping structure 6. The clamping structure 6 includes multiple product clamps 61, which are disposed inside the workpiece support platform 2 and distributed along the long and short sides of the workpiece 11. In this embodiment, it is preferably configured that three clamps are disposed on the long side and two on the short side. Each product clamp 61 is specifically a cylinder structure. The piston rod of the cylinder is connected to a flipping rod 611. When the control system 5 controls the cylinder to operate, the up-and-down movement of the piston rod can drive the flipping rod 611 to achieve a flipping motion.

[0040] In this embodiment, multiple flipping rods 611 located on the same side are connected to a long pressure plate 612. This long pressure plate 612 is preferably L-shaped and is configured to flip downwards under the action of the flipping rods 611, thereby applying pressure to the upper surface of the workpiece 11, which has already been preliminarily positioned, and pressing it firmly onto the workpiece support platform 2. To cooperate with the workpiece support platform 2 to reserve an interference-free processing path for the processing head 41, the long pressure plate 612, when pressing the workpiece 11, only covers the inner part of the upper surface of the workpiece 11, specifically occupying one-half to two-thirds of the width of the workpiece 11. This ensures that the entire outer edge area of ​​the workpiece 11 is unobstructed in the vertical direction, thus providing sufficient space for the movement of the processing head 41. When the workpiece 11 is being loaded or unloaded, the cylinder reverses its action, causing the pressure plate 612 to flip upwards to an avoidance position, making operation convenient.

[0041] In this embodiment, all the above-mentioned components, including the motor 31 that drives the linear drive unit 3, the air pump 213 for positioning, the multiple cylinders for clamping, the four small cylinders 421 for the rolling structure 4 to move forward and backward, and the four heating blocks 412 for heating, are all controlled in a unified and coordinated manner by the central control system 5 located inside the frame 1.

[0042] The working principle of the automatic rolling machine for parting surfaces of face frames provided in this embodiment is as follows: First, the operator places the plastic face frame to be processed on the workpiece support table 2; Secondly, the control system 5 is activated, first driving the air pump 213 to draw air, and then using negative pressure adsorption to quickly and accurately position the workpiece 11. Subsequently, the control system 5 drives multiple cylinders in the clamping structure 6 to rotate and press down the long pressure plate 612, firmly pressing the workpiece 11 from the top surface onto the workpiece support platform 2. After the workpiece 11 is fixed, the control system 5 coordinates the control of four linear drive units 3, which drive their respective rolling structures 4 to move synchronously along the four sides of the workpiece 11. At the same time, the small cylinder 421 in the telescopic component 42 pushes the processing head 41 with the roller 414 heated to the set temperature forward, so that it adheres to the burr on the parting surface of the workpiece 11 with constant pressure. As the linear drive unit 3 moves, the high temperature roller 414 continues to roll, melting and flattening the burr, so that it is perfectly integrated with the edge of the workpiece 11, achieving a highly efficient deburring effect. After all four edges are processed, the control system 5 instructs the rolling structure 4 to retract by the small cylinder 421, the linear drive unit 3 to reset, the clamping structure 6 to loosen and flip to the avoidance position, the negative pressure adsorption stops, the operator removes the processed workpiece 11, places a new workpiece 11, and begins the next cycle.

[0043] Example 2 Please see Figure 1 as well as Figure 3-5 This embodiment is basically the same as the first embodiment, except that the heating structure of the processing head 41 is different in this embodiment. In this embodiment, the structure and connection relationship of other components such as the frame 1, the workpiece support platform 2, and the linear drive unit 3 are basically the same as in the first embodiment, and will not be described again here.

[0044] In this embodiment, the processing head 41 is designed as a highly integrated temperature-controlled roller assembly. Specifically, the processing head 41 includes a roller 414, a built-in heating element 415, and a temperature sensor 416.

[0045] Specifically, the roller 414 has a hollow structure, meaning it has a through cylindrical cavity inside. The roller 414 rotates around a fixed central support shaft 417. The roller 414 is preferably made of a metal with high thermal conductivity, such as a copper alloy or a surface-hardened aluminum alloy, to ensure that heat can be quickly and evenly transferred to its outer working surface.

[0046] Specifically, the built-in heating core 415 is installed in the hollow cavity inside the roller 414 and is tightly fitted to its inner wall or maintains a very small gap to achieve the most efficient heat transfer.

[0047] In this embodiment, the built-in heating core 415 is preferably a ceramic heating rod. When energized, the ceramic heating rod can rapidly generate high temperatures and directly heat the inner wall of the roller 414 through conduction and radiation.

[0048] In this embodiment, the processing head 41 also includes a temperature sensor 416. The temperature sensor 416 is located near the inner wall of the roller 414 and passes through and is fixed to the central support shaft 417. The temperature sensor 416 is specifically a thermocouple, with its temperature sensing end in close contact with the outer surface of the central support shaft 417. It is used to monitor the working temperature of the roller 414 in real time and feed its measurement signal back to the control system 5 of the equipment, thereby realizing closed-loop control of the working temperature of the roller 414.

[0049] The working principle of the automatic rolling machine for parting surfaces of face frames provided in this embodiment is as follows: When the equipment begins the rolling operation, the control system 5 energizes the built-in heating core 415, causing it to heat up rapidly. Since the heat is generated and transferred directly inside the roller, the roller 414 can reach the preset rolling process temperature in a very short time. Subsequently, the telescopic component 42 drives the processing head 41 to extend, so that the heated roller 414 rolls on the parting surface of the workpiece 11, achieving a high-quality heat melting and rolling effect.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A face frame parting surface automatic edging machine characterized by, include: Rack (1); The workpiece support platform (2) is provided on the frame (1) and is configured to support only the inner part of the bottom surface of the workpiece (11) when carrying the workpiece (11); Linear drive unit (3) is mounted on the frame (1); A rolling edge structure (4) is disposed on the linear drive unit (3), and the rolling edge structure (4) includes a processing head (41) for hot-melt rolling of the outer edge of the workpiece (11); and The control system (5) is configured to coordinate the control of multiple linear drive units (3) to drive the processing head (41) to move along a preset trajectory.

2. The automatic face frame parting line edging machine according to claim 1, characterized in that, The hemming structure (4) further includes a telescopic component (42), which is disposed on the linear drive unit (3). The telescopic component (42) includes a small cylinder (421) and a guide rail slider (422). The telescopic component (42) is configured to drive the guide rail slider (422) to move under the drive of the small cylinder (421).

3. The automatic face frame parting line edging machine according to claim 2, characterized in that, The processing head (41) is connected to the guide rail slider (422). The processing head (41) includes, in sequence according to the heat transfer path, a heat insulation block (411), a heating block (412), a heat transfer guide pin (413), and a roller (414) disposed at the end of the heat transfer guide pin (413).

4. An automatic edge-rolling machine for the parting surface of a face frame according to claim 2, characterized in that, The processing head (41) is a temperature-controlled roller assembly, which includes: The roller (414) is designed as a hollow structure; An internal heating element (415) is disposed within the hollow cavity of the roller (414) and configured to directly heat the roller (414) internally; and A temperature sensor (416) is provided, which is located near the inner wall of the roller (414) to monitor the working temperature of the roller (414) in real time.

5. An automatic edge-rolling machine for the parting surface of a face frame according to claim 4, characterized in that, The roller (414) rotates around a fixed central support shaft (417). The built-in heating core (415) is a ceramic heating rod that passes through and is fixed on the central support shaft (417). The temperature sensor (416) is a thermocouple whose sensing end is in close contact with the outer surface of the central support shaft (417) and forms rolling contact with the inner wall of the roller (414).

6. An automatic edge-rolling machine for the parting surface of a face frame according to claim 1, characterized in that, The workpiece (11) is the frame of the display. There are four linear drive units (3) arranged in a rectangular array. The four edge rolling structures (4) are connected to the four linear drive units (3) respectively and are configured to simultaneously perform hot melt rolling on the four outer edges of the workpiece (11).

7. An automatic edge-rolling machine for the parting surface of a face frame according to claim 1, characterized in that, The workpiece support platform (2) is also provided with a positioning component (21). The positioning component (21) is a negative pressure adsorption device, including multiple air holes (211), air pipes (212) opened on the workpiece support platform (2), and an air pump (213) connected to the air pipes (212). The positioning component (21) is configured to perform preliminary positioning of the workpiece (11).

8. The automatic face frame parting line edging machine according to claim 1, characterized in that, It also includes a clamping structure (6) configured to press the workpiece (11) tightly against the workpiece support platform (2) after the workpiece (11) has been initially positioned. The clamping structure (6) only presses the inner part of the upper surface of the workpiece (11) and works in cooperation with the workpiece support platform (2) to reserve a non-interference processing path for the processing head (41) in the outer edge area of ​​the workpiece (11).

9. An automatic edge-rolling machine for the parting surface of a face frame according to claim 8, characterized in that, The clamping structure (6) includes a plurality of flip-up product clamps (61), which are configured to flip to a clearance position when not in operation to facilitate loading and unloading of workpieces (11).

10. The automatic face frame parting line edging machine according to claim 9, characterized in that, Multiple product clamps (61) are provided on one side of the workpiece support platform (2), including multiple flipping rods (611) and pressure plates (612). The pressure plates (612) are connected to the multiple flipping rods (611). The pressure plates (612) are configured to clamp and fix the workpiece (11) vertically as the flipping rods (611) move when the workpiece (11) is positioned.

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