A reinforcing bar hot-pressing apparatus

Abstract

The application discloses a reinforcing rib hot-pressing equipment, which comprises a reinforcing rib sticking mechanism, a reinforcing rib sticking conveying mechanism, a positioning mechanism, a pressing mechanism and a heating mechanism, wherein the reinforcing rib sticking mechanism is used for forming a semi-finished product by adding reinforcing ribs to a door plate; the reinforcing rib sticking conveying mechanism is used for conveying the semi-finished product to the heating mechanism; the positioning mechanism is used for positioning the semi-finished product; the pressing mechanism is used for pressing the reinforcing ribs on the semi-finished product; and the heating mechanism is used for heating and hot-pressing the reinforcing ribs and the door plate to form a finished product. The application can effectively solve the problem that the reinforcing ribs are prone to deformation due to the excessive pressure coverage range of the platform type integral hot-pressing, and overcome the defects of the fixed size pressing and heating mode, such as complicated die changing, low automation degree and limited production efficiency caused by the dependence on special molds, so as to realize the full-process automatic operation from reinforcing rib assembly, conveying, positioning, local pressing to hot-pressing forming, and improve the adaptability to reinforcing rib products with different specifications and different layouts.

Description

Technical Field

[0001] This invention relates to the field of hot pressing technology for reinforcing ribs, and more particularly to a hot pressing device for reinforcing ribs. Background Technology

[0002] In existing technologies, the hot pressing process for reinforcing ribs is widely used in the manufacturing of panel structures such as door panels to improve their overall rigidity and resistance to deformation. Currently, the mainstream hot pressing methods mainly include two types: platform-type integral hot pressing and fixed-size compression heating.

[0003] Platform-type integral hot pressing typically uses a large-area heating platform to simultaneously pressurize and heat the entire door panel along with the reinforcing ribs. This method is suitable for situations where the height of the reinforcing ribs is higher than the height of the door panel's folded edge. However, due to the wide range of hot pressing action and the difficulty in precisely controlling the pressure distribution, it can easily lead to localized deformation at the joint between the door panel and the reinforcing ribs, or cause overall dimensional deviations in the product, affecting product precision and appearance quality.

[0004] On the other hand, the fixed-size pressing heating method uses a special pressing mold to locally heat-press the reinforcing ribs of a specific length. Although this method can reduce the risk of overall deformation to some extent, its molds are usually designed for a fixed length and cannot adapt to the processing requirements of reinforcing ribs of different specifications. When product specifications change, it is necessary to manually replace the pressing mold of the corresponding size, which not only has a low degree of automation, but also significantly prolongs the mold change and debugging cycle, reduces production efficiency, and increases labor costs.

[0005] In summary, existing hot pressing platforms for reinforcing ribs still have significant shortcomings in terms of adaptability, automation, and forming accuracy. There is an urgent need for a new type of hot pressing device that can balance hot pressing stability, mold versatility, and high-efficiency automation to meet the needs of modern flexible manufacturing and high-efficiency production. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a hot pressing device for reinforcing ribs.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This invention provides a reinforcing rib hot pressing device, comprising: a rib-adhesive mechanism, a rib-adhesive conveying mechanism, a positioning mechanism, a pressing mechanism, and a heating mechanism. The rib-adhesive mechanism is used to add reinforcing ribs to a door panel to form a semi-finished product. The rib-adhesive conveying mechanism is used to convey the semi-finished product to the heating mechanism. The positioning mechanism is used to position the semi-finished product. The pressing mechanism is used to press the reinforcing ribs on the semi-finished product. The heating mechanism provides heat to hot press the reinforcing ribs and the door panel to form the finished product.

[0008] In one specific embodiment, the adhesive reinforcement mechanism includes an adhesive reinforcement bracket, the adhesive reinforcement bracket is provided with an adhesive reinforcement platform, and the adhesive reinforcement platform is used to add reinforcing ribs to the door panel to form a semi-finished product.

[0009] In one specific embodiment, the adhesive bonding platform consists of several sets of loading platforms, with adjacent loading platforms forming a loading gap. One end of the adhesive bonding conveying mechanism extends to the loading gap, and the other end extends to the heating mechanism. The adhesive bonding conveying mechanism includes a belt frame, a belt motor, a belt conveyor line, and a lifting cylinder. The belt conveyor line is installed on the belt frame, the belt motor is driven and connected to the belt conveyor line, and the piston rod of the lifting cylinder is connected to the belt frame to raise and lower the belt frame.

[0010] In one specific embodiment, the heating mechanism includes a heating bracket, the heating bracket is provided with a heating platform and the positioning mechanism, the heating platform is composed of several sets of support platforms, adjacent support platforms form support gaps, the adhesive conveying mechanism extends to the support gaps, the support platform is provided with a heating element, and the heating element provides heat to hot press the reinforcing ribs and the door panel.

[0011] In one specific embodiment, the upper surface of the heating element is provided with a heat-conducting plate, and the periphery of the heat-conducting plate is provided with an isolation plate.

[0012] In one specific embodiment, the positioning mechanism includes a forward positioning component, a side positioning component, and a rear positioning component. The forward positioning component includes a forward servo module and a forward positioning element. The forward servo module is disposed in the support gap, and the forward positioning element is tractively connected to the forward servo module. The side positioning component includes a side servo module and a side positioning element. The side positioning element is tractively connected to the side servo module. The rear positioning component includes a positioning seat and a positioning stop. The positioning seat is mounted on the heating bracket and located at the end of the adhesive conveying mechanism away from the adhesive bracket. The positioning stop is mounted on the positioning seat.

[0013] In one specific embodiment, the pressing mechanism includes a pressing bracket, the pressing bracket is provided with a linear guide rail, the linear guide rail is slidably connected to a transverse frame, the transverse frame is connected to a driving assembly, the transverse frame is provided with a pressing cylinder assembly, the driving assembly drives the transverse frame to move back and forth along the linear guide rail, and the pressing cylinder assembly is used to press the reinforcing ribs on the semi-finished product.

[0014] In one specific embodiment, the driving component includes a drive motor, the output end of which is connected to a gear, and the pressing bracket is provided with a rack parallel to the linear guide rail, the gear meshing with the rack.

[0015] In one specific embodiment, the pressing cylinder assembly includes a pressing cylinder and a pressing block, the pressing cylinder being installed at the lower end of the transverse frame, and the pressing block being connected to the piston rod of the pressing cylinder.

[0016] In one specific embodiment, the number of the downward pressure cylinder assemblies is multiple, and the downward pressure block is equipped with various specifications and sizes.

[0017] The reinforcing rib hot pressing equipment of the present invention has the following advantages compared with the prior art: reinforcing ribs are added to the door panel by manual or robotic means on the rib-adhesive mechanism to form a semi-finished product; subsequently, the semi-finished product is automatically transported to the heating area by the rib-adhesive conveying mechanism; during this process, the positioning mechanism can adaptively position itself according to the actual size of the semi-finished product to ensure its accurate position and stable posture in the hot pressing station; next, the pressing mechanism performs localized and precise pressing on the corresponding areas according to the specific distribution of the reinforcing ribs on the semi-finished product, avoiding applying ineffective pressure to non-reinforced areas; finally, the heating mechanism provides a controllable heat source to efficiently hot press the contact area between the pressed reinforcing ribs and the door panel, so that the two are firmly bonded to form a high-quality finished product. Specifically, compared to existing technologies, this equipment effectively solves the problem of deformation of reinforcing ribs caused by excessive pressure coverage in platform-type integral hot pressing. It also overcomes the drawbacks of fixed-size pressing and heating methods, such as cumbersome mold changes, low automation, and limited production efficiency due to reliance on specialized molds. Furthermore, through the coordinated operation of various functional mechanisms, the equipment achieves fully automated operation from reinforcing rib assembly, conveying, positioning, local pressing to hot pressing molding. This not only improves adaptability to reinforcing rib products of different specifications and layouts but also significantly shortens changeover time and reduces the need for manual intervention. In addition, the combination of precise local pressing and controllable heating effectively ensures uniform stress and stable temperature during the hot pressing process, thereby improving the structural strength, dimensional accuracy, and appearance consistency of the finished product.

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the reinforcing rib hot pressing device provided by the present invention; Figure 2 Schematic diagram of the adhesive bonding mechanism and adhesive bonding conveying mechanism provided by the present invention; Figure 3 This is a schematic diagram of the positioning mechanism and heating mechanism provided by the present invention; Figure 4 This is a schematic diagram of the pressing mechanism provided by the present invention. Attached image description: 10. Adhesive bonding mechanism, 11. Adhesive bonding bracket, 12. Adhesive bonding platform, 121. Loading platform, 20. Adhesive bonding conveyor mechanism, 21. Belt frame, 22. Belt motor, 23. Belt conveyor line, 24. Lifting cylinder, 30. Positioning mechanism, 31. Front push positioning component, 311. Front push servo module, 312. Side push positioning component, 321. Side push servo module, 322. Rear end positioning component, 33. Positioning seat, 331. Positioning stop, 332. Pressing mechanism, 40. Pressing bracket, 41. Linear guide rail, 42. Horizontal frame, 43. Drive component, 44. Drive motor, 441. Gear, 442. Rack, 443. Pressing cylinder component, 45. Pressing cylinder, 451. Pressing block, 452. Heating mechanism, 50. Heating bracket, 51. Heating platform, 52. Support platform, 521. Heat conducting plate, 53. Isolation plate, 54. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0029] See Figures 1 to 4As shown, this invention discloses a specific embodiment of a reinforcing rib hot pressing device, including: a rib-adhesive mechanism 10, a rib-adhesive conveying mechanism 20, a positioning mechanism 30, a pressing mechanism 40, and a heating mechanism 50. The rib-adhesive mechanism 10 is used to add reinforcing ribs to a door panel to form a semi-finished product. The rib-adhesive conveying mechanism 20 is used to convey the semi-finished product to the heating mechanism 50. The positioning mechanism 30 is used to position the semi-finished product. The pressing mechanism 40 is used to press the reinforcing ribs on the semi-finished product. The heating mechanism 50 provides heat to hot press the reinforcing ribs and the door panel to form a finished product.

[0030] Specifically, the reinforcing rib bonding mechanism 10 is located at the beginning of the production line and is used to install the reinforcing ribs onto the door panel to form a semi-finished product. In actual operation, the pre-cut reinforcing ribs (such as aluminum alloy strips, composite material strips, etc.) coated with hot melt adhesive can be placed at the designated position on the door panel by manual labor or a robotic arm. To improve assembly accuracy, the reinforcing rib bonding mechanism 10 can be equipped with auxiliary positioning devices, such as graduated limit blocks, laser projection guidance systems, or industrial camera vision recognition modules, to ensure accurate lateral and longitudinal positioning of the reinforcing ribs on the door panel. In some embodiments, a light pressure roller or a local preheating unit can also be integrated to apply brief pressure or gentle heating to the reinforcing ribs after bonding, so that they are initially attached to the door panel surface and prevent displacement during subsequent handling.

[0031] The reinforcing rib conveying mechanism 20 connects the reinforcing rib mechanism 10 to the subsequent hot pressing station, and is used to smoothly convey the door panel (i.e., semi-finished product) with the reinforcing ribs attached to it to the heating area. This mechanism typically uses a roller, belt, or chain conveyor platform, with adjustable width or movable guide edges to accommodate the passage requirements of door panels of different sizes. The conveying speed is controlled by a servo motor and synchronized with the overall production line cycle.

[0032] The positioning mechanism 30 is used to precisely position the semi-finished product entering the hot-pressing area. Its typical structure includes multiple sets of adjustable positioning baffles driven by cylinders or servo electric cylinders, respectively arranged at the front, side, or diagonal positions of the door panel. When the semi-finished product is conveyed to the predetermined area, sensors (such as photoelectric switches, proximity switches, or laser rangefinders) detect its positioning status, and the control system then drives the positioning baffles to extend, pushing the door panel to a unified reference position. Furthermore, a machine vision system can be integrated, using a camera to capture images of the door panel, identifying its contours, the number and distribution characteristics of reinforcing ribs, and dynamically adjusting the positioning strategy to adapt to different product models.

[0033] The pressing mechanism 40 is positioned above the heating zone to apply a vertically downward clamping force to the reinforcing ribs on the semi-finished product. Unlike traditional integral pressing plates, this pressing mechanism 40 employs a modular, programmable pressing head array structure. For example, it consists of several independently controlled pneumatic or electric pressing heads, each corresponding to a possible reinforcing rib installation position. The control system, based on the model information of the currently processed door panel (obtained through barcode scanning, MES system distribution, or visual recognition), only activates the pressing head corresponding to the actual reinforcing rib position to descend, while the remaining pressing heads remain in place. Silicone pads, polyurethane buffer layers, or high-temperature resistant flexible materials can be installed at the bottom of the pressing heads to accommodate minor unevenness on the door panel surface and prevent damage to the paint or coating.

[0034] The heating mechanism 50 is located below the pressing mechanism 40 and corresponds to the pressing area. It provides heat to activate the hot melt adhesive or promote material fusion. Specifically, it can be an infrared radiation heating plate, a hot air nozzle array, an embedded electric heating tube, or a ceramic heating module. Preferably, the heating area is divided into multiple independent temperature-controlled zones, each corresponding to a pressure head in the pressing mechanism 40. When a region has reinforcing ribs, the corresponding heating zone automatically turns on and heats according to preset process parameters (e.g., temperature 180-220℃, time 10-30 seconds); regions without reinforcing ribs remain closed or in a low-temperature standby state. The heating process is linked to the pressing action: positioning and pressing are completed first, then heating is initiated, ensuring hot-press bonding is completed under stable pressure.

[0035] The entire workflow is as follows: First, the reinforcing ribs are attached at the rib-adhesive mechanism 10 to form a semi-finished product; then, the rib-adhesive conveying mechanism 20 sends it to the hot pressing station; the positioning mechanism 30 automatically corrects the position according to the door panel size; the pressing mechanism 40 activates the corresponding pressing head to locally press the reinforcing ribs according to their actual distribution; finally, the heating mechanism 50 precisely heats the pressing area to complete the hot pressing and curing, and outputs the finished product.

[0036] In other words, compared to existing technologies, this equipment can effectively solve the problem of deformation of reinforcing ribs caused by excessive pressure coverage in platform-type integral hot pressing. It also overcomes the shortcomings of fixed-size pressing and heating methods, such as cumbersome mold changes, low automation, and limited production efficiency due to reliance on specialized molds. Furthermore, through the coordinated operation of various functional mechanisms, the equipment achieves fully automated operation from reinforcing rib assembly, conveying, positioning, local pressing to hot pressing molding. This not only improves the adaptability to reinforcing rib products of different specifications and layouts but also significantly shortens changeover time and reduces the need for manual intervention. In addition, the combination of precise local pressing and controllable heating effectively ensures uniform stress and stable temperature during the hot pressing process, thereby improving the structural strength, dimensional accuracy, and appearance consistency of the finished product.

[0037] See Figures 1 to 2As shown, in one embodiment, the adhesive reinforcement mechanism 10 includes an adhesive reinforcement bracket 11, the adhesive reinforcement bracket 11 is provided with an adhesive reinforcement platform 12, and the adhesive reinforcement platform 12 is used to add reinforcing ribs to the door panel to form a semi-finished product.

[0038] Specifically, the rib-bonding mechanism 10 is the starting station of the entire reinforcing rib hot-pressing equipment. Its core components are the rib-bonding support 11 and the rib-bonding platform 12 mounted on it. In the actual structure, the rib-bonding support 11 is usually constructed of high-strength profiles (such as aluminum alloy profiles or welded steel structures), which have good rigidity and stability, and can withstand the loads applied to the door panel and during operation without significant deformation. The bottom of the support can be equipped with adjustable feet or shock-absorbing pads to adapt to uneven ground and reduce vibration transmission.

[0039] The adhesive reinforcement platform 12 is fixedly installed on top of the adhesive reinforcement bracket 11, serving as the operating reference surface for door panel placement and reinforcing rib assembly. This platform is typically made of materials with high flatness and wear resistance, such as cast iron, stainless steel, or high-density engineering plastics. The surface can be precision ground to ensure flatness error is controlled within ±0.1mm. To facilitate door panel positioning, the adhesive reinforcement platform 12 can integrate the following auxiliary structures: Positioning baffle: An adjustable or quick-change mechanical baffle (such as an L-shaped limit plate) is set at the edge of the platform or at a specific location to restrict the front-back and left-right movement of the door panel, ensuring that the door panel is in the same reference position each time it is placed. Scale markings or laser projection: A coordinate grid is engraved on the platform surface, or a laser projection device is installed above it to project the ideal installation position of the reinforcing ribs onto the door panel in the form of light spots or lines, to help operators or robots to accurately align them; Vacuum adsorption holes: In high-end automated configurations, the inside of the adhesive platform 12 can be equipped with a vacuum chamber and several adsorption holes on its surface. By generating negative pressure through a vacuum pump, lightweight door panels (such as honeycomb panels and laminated panels) can be firmly adsorbed and fixed to prevent slippage during the application of reinforcing ribs.

[0040] In terms of operation, the staff or collaborative robot first place the door panel to be processed steadily on the adhesive platform 12, and complete the rough positioning by relying on the positioning baffle or visual guidance; then, according to the process requirements, the reinforcing ribs with hot melt adhesive layer (usually pre-cut strip profiles) are attached to the back or inner designated area of ​​the door panel along the designated trajectory to form a semi-finished product.

[0041] In other words, the combination of the high-flatness adhesive platform 12 and the rigid adhesive bracket 11 provides a stable and flat support surface for the door panel, effectively avoiding the deviation in the installation of the reinforcing ribs caused by platform shaking or unevenness, and laying a precision foundation for the subsequent hot pressing process.

[0042] See Figures 1 to 2As shown, in one embodiment, the adhesive bonding platform 12 is composed of several sets of loading platforms 121, with adjacent loading platforms 121 forming a loading gap. One end of the adhesive bonding conveying mechanism 20 extends to the loading gap, and the other end extends to the heating mechanism 50. The adhesive bonding conveying mechanism 20 includes a belt frame 21, a belt motor 22, a belt conveyor line 23, and a lifting cylinder 24. The belt conveyor line 23 is installed on the belt frame 21, the belt motor 22 is drivenly connected to the belt conveyor line 23, and the piston rod of the lifting cylinder 24 is connected to the belt frame 21 to lift the belt frame 21.

[0043] Specifically, the bonding platform 12 is not a single, solid panel, but rather composed of several independent loading platforms 121 arranged side-by-side. For example, in a typical implementation, two or three sets of rectangular loading platforms 121 can be arranged at intervals along the width of the door panel. Each loading platform 121 is made of a high-rigidity material (such as thick steel plate or cast aluminum) with a flat surface, used to support a local area of ​​the door panel. A certain width of loading gap (usually 50-150mm) is reserved between adjacent loading platforms 121. This gap runs horizontally through the entire bonding station and is directly opposite the running path of the bonding conveyor 20. The loading gap not only provides a physical channel for the bonding conveyor 20 to enter, but also ensures that when the door panel is fitted with reinforcing ribs, only the effective load-bearing area is supported by the loading platforms 121, while the middle area is suspended, facilitating the subsequent intervention of the bonding conveyor 20 from below.

[0044] The adhesive conveying mechanism 20 is generally linear, with one end precisely aligned and extending into the feeding gap, and the other end extending into the working area of ​​the heating mechanism 50, forming a continuous material flow channel. This mechanism mainly includes the following components: Belt frame 21: As a load-bearing structure, it is usually made of lightweight but rigid aluminum alloy profile or welded steel frame. Its width is slightly smaller than the feeding gap to ensure that it can be smoothly embedded without interfering with the feeding table 121.

[0045] Belt conveyor 23: Consists of a pair of synchronous pulleys and a high-temperature resistant flat belt (such as PU or silicone material) surrounding them, installed on belt frame 21, for direct contact with and carrying of semi-finished door panels.

[0046] Belt motor 22: Generally a servo motor or a geared motor, it is connected to the drive pulley of the belt conveyor 23 through a coupling, synchronous belt or chain drive, which can realize precise speed control and start / stop positioning.

[0047] Lifting cylinder 24: Installed below the equipment base or frame, its piston rod is vertically connected to the bottom of the belt frame 21. The cylinder can be single-acting or double-acting, and the stroke is set according to process requirements (usually 30-80mm), used to drive the entire belt frame 21 to rise and fall vertically.

[0048] In actual operation, workers or robots first place the door panel on the adhesive platform 12, which consists of multiple loading platforms 121. At this time, the door panel spans across each loading platform 121, with the middle area suspended above the loading gap. Subsequently, the reinforcing ribs are attached at this position, forming a semi-finished product. After the attachment is completed, the control system starts the belt motor 22, driving the belt conveyor 23 to operate. Since the belt conveyor 23 is located directly below the loading gap and its initial position is slightly lower than the surface of the loading platform 121, the lifting cylinder 24 first lifts the belt frame 21 to a position higher than (or flush with) the loading platform 121, so that the belt conveyor 23 supports the bottom surface of the door panel. Then the belt rotates, smoothly conveying the semi-finished product horizontally to the heating station. When the semi-finished product reaches the predetermined position above the heating mechanism 50, the belt motor 22 stops, and the piston rod of the lifting cylinder 24 begins to retract, driving the entire belt frame 21 and the belt conveyor 23 to descend synchronously. As the belt conveyor 21 descends, the semi-finished product gradually detaches from the belt support and eventually rests completely on the bearing surface of the heating mechanism 50 (such as a heating plate or positioning platform). At this point, the belt conveyor 23 has descended to a safe position below the heating area, without interfering with subsequent positioning, pressing, and hot pressing operations. After hot pressing is completed, the lifting cylinder 24 can extend again to raise the unloaded belt conveyor 21 back to the loading gap height, ready to receive the next semi-finished product, thus realizing cyclical operation.

[0049] In other words, by embedding the reinforcing rib conveying mechanism 20 into the loading gap, semi-finished products can be directly transported from the assembly station to the hot pressing station without manual handling or additional transfer devices, achieving efficient and continuous automated connection between processes and improving production line cycle time. Furthermore, the reinforcing rib platform 12 adopts a split loading platform 121 design with a loading gap in the middle, allowing the reinforcing rib conveying mechanism 20 to be completely hidden under the platform when not in operation, without affecting the reinforcing rib application work of operators or robots on the reinforcing rib platform 12, ensuring human and machine safety and operating space. In addition, the lifting cylinder 24 controls the raising and lowering of the belt conveyor 21, ensuring that the semi-finished products can be smoothly and without impact placed onto the heating mechanism 50 after being conveyed to the correct position, avoiding displacement of the reinforcing ribs or damage to the door panel due to slippage or collision.

[0050] See Figures 1 to 3 As shown, in one embodiment, the heating mechanism 50 includes a heating bracket 51, the heating bracket 51 is provided with a heating platform 52 and the positioning mechanism 30, the heating platform 52 is composed of a plurality of support platforms 521, adjacent support platforms 521 form a support gap, the adhesive conveying mechanism 20 extends to the support gap, the support platform 521 is provided with a heating element, the heating element provides heat to hot press the reinforcing rib and the door panel.

[0051] Specifically, the heating mechanism 50 uses the heating support 51 as its skeleton, typically constructed with a high-strength welded steel structure or a heavy-duty aluminum profile frame, possessing excellent rigidity and thermal stability, capable of withstanding repeated thermal cycles for extended periods without significant deformation. The heating support 51 serves as the load-bearing foundation for the entire hot pressing station, integrating the heating platform 52 and the positioning mechanism 30 to form a fully functional hot pressing operation unit.

[0052] The heating platform 52 is not a single flat plate, but rather consists of several independent support platforms 521 arranged side by side along the width of the door panel. For example, in a typical implementation, two, three, or more rectangular support platforms 521 may be provided, each made of a high-temperature resistant, high-thermal-conductivity, and high-mechanical-strength material (such as cast aluminum, stainless steel, or graphite composite plate), with the surface precision-machined to ensure flatness.

[0053] A support gap of a certain width (usually 60-150mm) is reserved between adjacent support platforms 521. This gap runs horizontally through the entire heating area and is precisely aligned in space with the belt frame 21 of the upstream adhesive conveying mechanism 20. This design allows the adhesive conveying mechanism 20 to lower and exit from the support gap via the lifting cylinder 24 after feeding, avoiding interference with the heating platform 52.

[0054] Heating elements may be embedded in part or all of the support platform 521 to provide the heat energy required for hot pressing. Specific forms of the heating elements may include: Heating element: A U-shaped or straight tube resistance heating element embedded inside the support base 521; Ceramic heating element: Attached to the underside of the platform surface, it heats up quickly and has a sensitive thermal response.

[0055] Preferably, the heating elements on each set of support platforms 521 are independently zoned and controlled, meaning each set of support platforms 521 corresponds to a temperature control loop, equipped with an independent thermocouple, solid-state relay, and PID temperature controller. The control system can, based on the model of the currently processed door panel and the layout of the reinforcing ribs, only activate heating on the support platforms 521 corresponding to the areas with reinforcing ribs, while keeping the remaining areas at a low temperature or in a closed state, thus achieving on-demand heating.

[0056] The positioning mechanism 30 is directly mounted on the heating bracket 51 and located around the heating platform 52. Its typical structure includes: Front positioning baffle: driven by a cylinder or servo electric cylinder, used to hold the front edge of the door panel; Lateral positioning components: installed on one or both sides of the door panel, which can be fixed limit blocks or movable push plates; Auxiliary sensors, such as photoelectric switches, proximity switches, or laser rangefinders, are used to detect whether the door panel is in place.

[0057] When the semi-finished product is delivered to the heating platform 52 by the adhesive conveying mechanism 20 and placed there, the positioning mechanism 30 immediately activates: the front cylinder extends to push the door panel to a uniform reference position, and the lateral limit block restricts lateral displacement.

[0058] In other words, by designing the heating platform into 52 segments and using zoned temperature control, heat is supplied only to areas with actual reinforcing ribs, significantly reducing energy consumption. Simultaneously, it prevents heat damage to the door panel substrate (such as wood, PVC film, or painted layers) caused by heat in areas without reinforcing ribs, such as warping, discoloration, or delamination. Furthermore, the positioning mechanism 30 ensures consistent door panel placement each time, the pressing mechanism 40 presses the panels "point-to-point" according to the reinforcing rib distribution, and the heating element simultaneously heats the pressing area. The synergistic effect of these three mechanisms ensures that the hot-pressing process is completed within the optimal pressure-temperature-time window, improving bonding strength and the finished product qualification rate.

[0059] See Figure 3 As shown, in one embodiment, the upper surface of the heating element is provided with a heat-conducting plate 53, and the heat-conducting plate 53 is provided with an isolation plate 54 around its periphery.

[0060] Specifically, the heating element is not directly exposed to the external environment, but its upper surface is covered with a heat-conducting plate 53. This heat-conducting plate 53 is typically made of a metallic material with high thermal conductivity, high thermal stability, and good mechanical strength, for example: Aluminum alloy sheet, anodized to improve heat resistance and oxidation resistance; Stainless steel sheets are suitable for higher temperature or corrosive environments.

[0061] The bottom surface of the heat-conducting plate 53 is in close contact with the heating element, and efficient heat conduction is usually achieved through the following methods: Apply high thermal conductivity silicone grease or thermal pads between the heating element and the heat-conducting plate 53 to fill the micro gaps and reduce contact thermal resistance. Use bolts or pressure plates to firmly press the heat-conducting plate 53 onto the heating element to ensure that it does not loosen or develop gaps due to thermal expansion and contraction during long-term use.

[0062] The heat-conducting plate 53 not only serves as a heat transfer medium but also directly constitutes the final support surface of the door panel. Surrounding the perimeter of the heat-conducting plate 53 are insulating plates 54 (also called heat insulation baffles or heat shields). The insulating plates 54 are typically made of materials with low thermal conductivity and high temperature resistance, such as ceramic fiber boards or mica boards.

[0063] The coverage of the isolation plate 54 can include not only the four edges of the heat-conducting plate 53, but also extend to the space between the heating element below and the adjacent mechanism, effectively blocking the lateral diffusion of heat to the non-working area.

[0064] See Figure 3As shown, in one embodiment, the positioning mechanism 30 includes a forward positioning component 31, a side positioning component 32, and a rear positioning component 33. The forward positioning component 31 includes a forward servo module 311 and a forward positioning element 312. The forward servo module 311 is disposed in the support gap, and the forward positioning element 312 is tractively connected to the forward servo module 311. The side positioning component 32 includes a side servo module 321 and a side positioning element 322. The side positioning element 322 is tractively connected to the side servo module 321. The rear positioning component 33 includes a positioning seat 331 and a positioning block 332. The positioning seat 331 is installed on the heating bracket 51 and is located at the end of the adhesive conveying mechanism 20 away from the adhesive bracket 11. The positioning block 332 is installed on the positioning seat 331.

[0065] Specifically, the positioning mechanism 30 consists of three mutually cooperating sub-components: a forward positioning component 31, a side-pushing positioning component 32, and a rear positioning component 33. The three are respectively responsible for the precise positioning of the door panel in the front-back direction (X-axis) and the left-right direction (Y-axis), and together establish a unified processing benchmark.

[0066] The rear positioning component 33 serves as a fixed reference and is located at the end of the heating platform 52 away from the adhesive support 11 (i.e., the end point of the door panel conveying). The forward positioning component 31 actively pushes the door panel from the conveying start side; The side-push positioning component 32 clamps synchronously from both sides of the door panel to achieve center alignment.

[0067] This three-way positioning strategy of "fixing one end, pushing one end, and clamping on both sides" effectively eliminates the positional shift of the door panel caused by cumulative errors during transportation or initial placement deviations.

[0068] The rear positioning component 33 consists of a positioning seat 331 and a positioning stop 332. The positioning seat 331 is a rigid structural component, usually made of thick steel plate or cast iron, and is firmly installed on the heating bracket 51, located directly behind the end of the heating platform 52.

[0069] The positioning block 332 is installed on the front end face of the positioning seat 331. It can be a one-piece metal block or a replaceable wear-resistant insert (such as polyurethane, PEEK, or hardened steel). Its contact surface is perpendicular to the door panel conveying direction and is precision ground to ensure perpendicularity and flatness. In some high-precision embodiments, the positioning block 332 can also integrate a buffer element (such as a spring or elastic pad) to absorb the impact energy of the door panel and prevent rebound or damage to the paint surface.

[0070] This component serves as the absolute reference plane for the entire positioning system, does not participate in motion, and only provides a stable stop reference.

[0071] The forward positioning component 31 includes a forward servo module 311 and a forward positioning element 312. The forward-pushing servo module 311 is a high-precision linear drive unit, typically composed of a servo motor, a ball screw (or synchronous belt), a linear guide rail 42, and a slide table, and has closed-loop position control capability. This module is installed in the support gap—that is, in the gap between adjacent support platforms 521—allowing it to extend from below to perform the pushing action without interfering with the structure of the heating platform 52.

[0072] The forward positioning component 312 is fixed to the slide table of the servo module. Its shape is designed according to the bottom structure of the door panel, and it is commonly an L-shaped push plate, a flat push block, or a push rod with a flexible head. The initial position is slightly lower than the surface of the heat conduction plate 53, and it extends upward to contact the bottom surface of the door panel during operation. To prevent scratching the door panel, the contact area is often covered with soft material (such as silicone, felt, or engineering plastic).

[0073] During operation, the servo module receives instructions from the control system and drives the forward positioning component 312 to extend forward along the conveying direction (X-axis), smoothly pushing the door panel until its rear edge tightly fits the positioning block 332, thus completing precise positioning in the front and rear directions.

[0074] The side-push positioning components 32 are symmetrically arranged on the left and right sides of the heating platform 52, and each side includes a set of side-push servo modules 321 and a side-push positioning component 322: The side-push servo module 321 has a similar structure to the front-push module, but its installation direction is perpendicular to the conveying direction (Y-axis), and it is fixed to the side beam or independent base of the heating bracket 51.

[0075] The side-push positioning element 322 is typically a long strip pressure plate or multiple spaced push fingers, the length of which covers the typical width range of the door panel.

[0076] During the positioning process, the left and right side push servo modules 321 move synchronously in opposite directions, approaching the center at the same speed and with the same stroke, automatically centering the door panel on the theoretical center line of the heating platform 52. This process can be executed based on preset door panel width parameters, or it can be dynamically adjusted in conjunction with real-time feedback from the vision system.

[0077] When the semi-finished product is fed into the heating station by the adhesive conveying mechanism 20 and placed on the heating platform 52 composed of multiple support tables 521, the control system starts the side push positioning component 32, and the left and right side push positioning components 322 move inward synchronously to center the door panel in the Y-axis direction; then, the front push positioning component 31 starts, and the front push servo module 311 drives the front push positioning component 312 to move forward, pushing the door panel to move along the X-axis; the rear edge of the door panel continues to move forward until it closely abuts the positioning block 332 of the rear positioning component 33, at which point the front and rear positioning is completed.

[0078] See Figure 1 and Figure 4 As shown, in one embodiment, the pressing mechanism 40 includes a pressing bracket 41, the pressing bracket 41 is provided with a linear guide rail 42, the linear guide rail 42 is slidably connected to a transverse frame 43, the transverse frame 43 is connected to a driving assembly 44, the transverse frame 43 is provided with a pressing cylinder assembly 45, the driving assembly 44 drives the transverse frame 43 to move back and forth along the linear guide rail 42, and the pressing cylinder assembly 45 is used to press the reinforcing ribs on the semi-finished product.

[0079] Specifically, the pressing mechanism 40 uses the pressing bracket 41 as its overall support frame, typically constructed of high-strength welded steel or heavy-duty aluminum profiles. It is installed directly above the heating mechanism 50 to ensure sufficient rigidity to withstand repeated downward pressure without significant deformation. One or more pairs of high-precision linear guides 42 are fixedly installed on the pressing bracket 41 along the length of the door panel (i.e., the conveying direction, X-axis). These guides are arranged in parallel, forming a stable guiding reference for supporting and guiding the precise sliding of the moving parts.

[0080] The number of horizontal frames 43 is several (e.g., 2, 3, 4 or more), designed according to the maximum possible number and distribution density of reinforcing ribs in typical door panel products. Each horizontal frame 43 is a beam-like structure spanning the width direction (Y-axis) of the door panel, usually made of thick-walled square tube or C-shaped steel, with both ends slidably connected to linear guide rails 42 via sliders, ensuring that it can only translate along the X-axis direction without rotation or swaying.

[0081] Each horizontal frame 43 integrates: At least one downward pressure cylinder assembly 45 is used to provide a vertically downward clamping force; A separate drive assembly 44 is used to drive the transverse frame 43 to move along the linear guide rail 42.

[0082] This modular design concept of "one horizontal frame, one drive, and one clamping unit" allows each clamping unit to move and be controlled independently without interfering with each other.

[0083] See Figure 1 and Figure 4 As shown, in one embodiment, the drive assembly 44 includes a drive motor 441, the output end of which is connected to a gear 442, and the pressing bracket 41 is provided with a rack 443 parallel to the linear guide rail 42, the gear 442 meshing with the rack 443.

[0084] Specifically, the drive assembly 44 is the core actuator used to drive the transverse frame 43 to move precisely along the linear guide rail 42, and its structure adopts a gear 442-rack 443 transmission mechanism. This assembly mainly includes: Drive motor 441: Typically a high-response servo motor or stepper motor, with closed-loop control capability for position and speed, and mounted on the transverse frame 43 body; Gear 442: Fixedly mounted on the output shaft of drive motor 441, the module and tooth profile are selected according to the load and accuracy requirements; Rack 443: A long, precision rack is securely mounted on the lower support 41. Its length is parallel to the linear guide 42 and extends throughout the entire travel range of the transverse frame 43.

[0085] Each transverse frame 43 is equipped with an independent drive assembly 44, which includes a motor, a gear, and a corresponding rack section. When the control system receives the position information of the current door panel reinforcing rib, it calculates the target X-coordinate for each transverse frame 43. Subsequently, the corresponding drive motor 441 starts and rotates according to the command; the output shaft drives the gear 442 to rotate; the gear 442 meshes with the fixed rack 443, generating a reaction force that pushes the entire transverse frame 43 (along with the motor body) to translate along the linear guide rail 42; the actual displacement is fed back through the motor encoder, enabling closed-loop position control with a positioning accuracy of ±0.1mm or even higher. Because the rack 443 is continuously fixed, the transverse frame 43 can stop at any position along its entire length, without being limited by mechanical stops or cylinder stroke, achieving stepless positioning.

[0086] See Figure 1 and Figure 4 As shown, in one embodiment, the pressing cylinder assembly 45 includes a pressing cylinder 451 and a pressing block 452. The pressing cylinder 451 is mounted on the lower end of the transverse frame 43, and the pressing block 452 is connected to the piston rod of the pressing cylinder 451. The pressing cylinder assembly 45 may be multiple sets, and the pressing block 452 may be equipped with various specifications and sizes.

[0087] Specifically, each set of downward-pressing cylinder assembly 45 consists of two parts: Downward-pressing cylinder 451: Typically a standard or compact double-acting cylinder, featuring high repeatability and stable output force. Its cylinder body is securely mounted to the lower end face of the transverse frame 43 (i.e., the side facing the door panel) by bolts or quick-change clamps, with the piston rod extending vertically downwards.

[0088] Lower pressure block 452: As a clamping actuator that directly contacts the door panel reinforcing ribs, it is fixedly connected to the end of the cylinder piston rod. The connection method can be threaded in, hinged with a pin, or locked with a flange to ensure that it does not loosen under repeated impacts.

[0089] Instead of a single cylinder assembly, multiple sets of downward-pressing cylinder assemblies 45 are arranged on each horizontal frame 43, spaced apart along the width direction (Y-axis) of the door panel. For example, two, three, four, or even more independent cylinder-pressing block 452 units can be integrated on a single horizontal frame 43. The mounting positions of these components on the horizontal frame 43 are optimized: standard mounting hole arrays (such as 50mm spacing grid holes) can be used to facilitate flexible adjustment of the spacing between components; or sliding grooves and quick-clamping mechanisms can be set to achieve stepless adjustment.

[0090] The dimensions of the pressure block 452 vary, meaning the system pre-sets a series of pressure blocks 452 with different lengths, widths, or contact areas, forming a standardized "pressure block library." Typical dimensional differences are reflected in: Length direction (along the direction of the reinforcing rib): such as 50mm, 100mm, 150mm, 200mm, etc.; Width direction (perpendicular to the reinforcing rib): adaptable to different reinforcing rib widths; Height / thickness: Affects clamping stroke and rigidity.

[0091] Once the control system identifies the current door panel model, it will analyze the actual length of each reinforcing rib. For example, if a reinforcing rib is 300mm long, the system will call three sets of 100mm long pressing blocks 452 to press it in parallel. If the length of the other reinforcing rib is 180mm, then a combination of one 150mm and one 50mm rib can be used to cover it; For short reinforcing ribs (e.g., 80mm), only a single set of matching size pressure blocks 452 is used.

[0092] This strategy of "combining on demand and precise coverage" ensures that there are effective clamping points along the entire length of the reinforcing ribs, avoiding gaps in the middle that could lead to incomplete hot pressing.

[0093] In other words, by rationally distributing multiple sets of pressure blocks 452 along the length of the reinforcing rib, the problems of "vacuum pressure" or "lifting" in the middle caused by traditional single-point or two-point pressing are eliminated. This ensures that the hot melt adhesive is evenly pressed under the entire reinforcing rib and fully impregnates the substrate, significantly improving bonding strength and durability. Furthermore, there is no need to customize a special mold for each reinforcing rib length; simply calling different combinations of pressure blocks 452 of different quantities and sizes via software allows for quick switching of product models, suitable for multi-variety production modes. In addition, by selecting appropriately sized pressure blocks 452, excessively large blocks are avoided from covering non-reinforcing rib areas, thus preventing indentations, bulges, or peeling of the door panel finish due to uneven local pressure.

[0094] The above embodiments are preferred implementations of the present invention. In addition, the present invention can be implemented in other ways. Any obvious substitutions without departing from the concept of the present technical solution are within the protection scope of the present invention.

Claims

1. A reinforcing rib hot pressing device, characterized in that, include: The system includes a reinforcing rib bonding mechanism, a reinforcing rib conveying mechanism, a positioning mechanism, a pressing mechanism, and a heating mechanism. The reinforcing rib bonding mechanism is used to add reinforcing ribs to the door panel to form a semi-finished product. The reinforcing rib conveying mechanism is used to convey the semi-finished product to the heating mechanism. The positioning mechanism is used to position the semi-finished product. The pressing mechanism is used to press the reinforcing ribs on the semi-finished product. The heating mechanism provides heat to press the reinforcing ribs and the door panel together to form the finished product.

2. The reinforcing rib hot pressing equipment according to claim 1, characterized in that, The adhesive reinforcement mechanism includes an adhesive reinforcement bracket, which is equipped with an adhesive reinforcement platform. The adhesive reinforcement platform is used to add reinforcing ribs to the door panel to form a semi-finished product.

3. The reinforcing rib hot pressing equipment according to claim 2, characterized in that, The adhesive bonding platform consists of several sets of loading platforms, with adjacent loading platforms forming a loading gap. One end of the adhesive bonding conveying mechanism extends to the loading gap, and the other end extends to the heating mechanism. The adhesive bonding conveying mechanism includes a belt frame, a belt motor, a belt conveyor line, and a lifting cylinder. The belt conveyor line is installed on the belt frame, the belt motor is driven and connected to the belt conveyor line, and the piston rod of the lifting cylinder is connected to the belt frame to raise and lower the belt frame.

4. The reinforcing rib hot pressing equipment according to claim 3, characterized in that, The heating mechanism includes a heating bracket, which is equipped with a heating platform and a positioning mechanism. The heating platform is composed of several sets of support platforms, with adjacent support platforms forming a support gap. The adhesive conveying mechanism extends to the support gap. The support platform is equipped with a heating element, which heats the reinforcing ribs and door panel for hot pressing.

5. The reinforcing rib hot pressing equipment according to claim 4, characterized in that, The upper surface of the heating element is provided with a heat-conducting plate, and the heat-conducting plate is provided with an isolation plate around its periphery.

6. The reinforcing rib hot pressing equipment according to claim 4, characterized in that, The positioning mechanism includes a forward positioning component, a side positioning component, and a rear positioning component. The forward positioning component includes a forward servo module and a forward positioning element. The forward servo module is disposed in the support gap, and the forward positioning element is tractively connected to the forward servo module. The side positioning component includes a side servo module and a side positioning element. The side positioning element is tractively connected to the side servo module. The rear positioning component includes a positioning seat and a positioning block. The positioning seat is installed on the heating bracket and is located at the end of the adhesive conveying mechanism away from the adhesive bracket. The positioning block is installed on the positioning seat.

7. The reinforcing rib hot pressing equipment according to claim 4, characterized in that, The pressing mechanism includes a pressing bracket, which is provided with a linear guide rail. A transverse frame is slidably connected to the linear guide rail. A driving component is connected to the transverse frame. A pressing cylinder assembly is provided on the transverse frame. The driving component drives the transverse frame to move back and forth along the linear guide rail. The pressing cylinder assembly is used to press the reinforcing ribs on the semi-finished product.

8. The reinforcing rib hot pressing equipment according to claim 7, characterized in that, The drive assembly includes a drive motor, the output end of which is connected to a gear, and the pressing bracket is provided with a rack parallel to the linear guide rail, the gear meshing with the rack.

9. The reinforcing rib hot pressing equipment according to claim 7, characterized in that, The downward pressure cylinder assembly includes a downward pressure cylinder and a downward pressure block. The downward pressure cylinder is installed at the lower end of the transverse frame, and the downward pressure block is connected to the piston rod of the downward pressure cylinder.

10. The reinforcing rib hot pressing equipment according to claim 9, characterized in that, The number of the downward pressure cylinder assemblies is multiple, and the downward pressure blocks are equipped with various specifications and sizes.

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