A straight corner sealing strip extrusion mechanism in a plate

Abstract

A kind of straight edge strip extrusion mechanism in board inner right angle, it is related to the technical field of edge banding machine, including thickening sleeve, the thickening sleeve is fixedly connected at the bottom of table top, limiting rotating pipe is rotatably connected in the thickening sleeve, the top of limiting rotating pipe is equipped with triangular extrusion strip, rotating main shaft is rotatably connected in the limiting rotating pipe, the top of rotating main shaft is rotatably connected with inner fixed plate, the one side of inner fixed plate is formed with triangular connecting strip, triangular extrusion strip is fixedly connected together with triangular connecting strip, vertical adjusting assembly is installed on the inner fixed plate, limiting sleeve is installed on the vertical adjusting assembly, the utility model is driven by limiting rotating pipe triangular extrusion strip precision card into board inner right angle, it is combined with vertical adjusting assembly to realize the vertical displacement control of limiting sleeve, effectively eliminate the gap at the angle of edge strip and plate frame, with the advantages of eliminating the gap at the angle of edge strip and plate frame, improve the adhesion of edge strip.

Description

Technical Field

[0001] This utility model relates to the field of edge banding machine technology, and more specifically, to a right-angle edge banding extrusion mechanism for sheet metal. Background Technology

[0002] Edge banding machines are indispensable equipment in woodworking, mainly used for edge banding of various types of boards. However, in practical applications, especially for boards with complex shapes and internal right angles, traditional edge banding techniques have obvious shortcomings.

[0003] Due to inherent limitations of mechanical structures, when edge banding is applied to the inner corners of the board (such as a 90° angle), the cylindrical bonding wheel creates an arc transition when pressing the edge banding strip against the inner corner of the board, resulting in the edge banding strip not completely adhering to the edge of the board. This technical defect not only causes a noticeable gap at the angle between the edge banding strip and the board frame, severely affecting the product's appearance quality, but also significantly reduces the overall robustness of the edge banding structure. Utility Model Content

[0004] The purpose of this utility model is to solve the problems mentioned in the background art, and then to propose a right-angle edge banding extrusion mechanism for sheet metal.

[0005] The technical solution adopted by this utility model to solve its technical problem is: A right-angle edge banding extrusion mechanism for sheet metal includes a thickened sleeve fixedly connected to the bottom of a table. A limiting rotating tube is rotatably connected inside the thickened sleeve. A triangular extrusion strip is provided at the top of the limiting rotating tube. A rotating main shaft is rotatably connected inside the limiting rotating tube. An inner fixing plate is rotatably connected at the top of the rotating main shaft. A triangular connecting strip is formed on one side of the inner fixing plate. The triangular extrusion strip and the triangular connecting strip are fixedly connected together. A vertical adjustment component is installed on the inner fixing plate. A limiting sleeve is installed on the vertical adjustment component. The limiting sleeve can move up and down along the vertical direction under the action of the vertical adjustment component.

[0006] Furthermore, a single row of sprockets is provided on the outer side of the bottom of the limiting rotating tube.

[0007] Furthermore, a transmission sprocket is installed at the bottom of the rotating spindle, and a contact wheel is provided in the middle of the rotating spindle.

[0008] Furthermore, the thickened sleeve includes a sleeve body, the top of which is provided with a flange, which is fixedly connected to the bottom of the platform by bolts.

[0009] Furthermore, the limiting sleeve includes a sleeve body, the top of which is provided with a top plate, and the top plate is provided with a guide groove, a through hole and a positioning threaded hole.

[0010] Furthermore, the guide groove cooperates with the triangular extrusion strip and the triangular connecting strip.

[0011] Furthermore, the vertical adjustment assembly includes a fixed shaft, a position indicator is mounted on the top of the fixed shaft, the handwheel lifting shaft of the position indicator is threadedly connected to a positioning threaded hole, the fixed shaft passes through a through hole and is mounted on an inner fixing plate, and a handwheel is mounted on the top of the handwheel lifting shaft.

[0012] Furthermore, the inner fixing plate is provided with a through hole, and the bottom of the fixing shaft is provided with a fixing threaded hole. After the bolt passes through the through hole, it is threaded into the fixing threaded hole.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This utility model uses a limiting rotating tube to drive the triangular extrusion strip to accurately engage at the right angle of the plate, and combines the vertical adjustment component to realize the vertical displacement control of the limiting sleeve, effectively eliminating the gap between the edge banding strip and the plate frame at the angle, and has the advantages of eliminating the gap between the edge banding strip and the plate frame at the angle, improving the edge banding strip's fit and structural firmness. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the usage state of this utility model; Figure 2 This is a three-dimensional structural diagram of the present invention when it is assembled on an edge banding machine; Figure 3 This is a three-dimensional structural schematic diagram of the present invention; Figure 4 This is a cross-sectional view of the present invention; Figure 5 This is a three-dimensional structural diagram of the limiting rotating tube; Figure 6 This is a three-dimensional structural diagram of the connection between the limiting rotating tube and the inner fixing plate. Figure 7 A three-dimensional structural diagram of the limiting sleeve at the first angle; Figure 8 This is a three-dimensional structural diagram of the second angle of the limiting sleeve. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. The present utility model will be further described with reference to the accompanying drawings and embodiments: In existing technologies, edge banding machines have significant drawbacks when processing boards with inner right angles. When the cylindrical bonding rollers of traditional edge banding machines contact the inner corner of the board, the mechanical structure limits their ability to completely adhere to the right-angled edge, resulting in an arc-shaped transition gap at the angle between the edge banding strip and the board frame. This gap not only affects the product's appearance but also reduces the overall strength of the edge banding structure, which is particularly pronounced when processing boards with right-angled structures such as furniture cabinets and door / window frames. To solve the above problems, researchers discovered that the key lies in changing the contact method between the edge banding strip and the inner corner of the board. Traditional fixed extrusion structures are difficult to adapt to changes in different angles, requiring the design of an extrusion mechanism that can be dynamically adjusted. After numerous experiments, it was found that a triangular extrusion structure that can be adjusted by rotation can accurately match right-angle contours, and when combined with a height-adjustable limiting device, it can achieve a complete fit between the edge banding strip and the edge of the board. like Figure 1 As shown, the right-angle edge banding strip extrusion mechanism described in this case is installed on the table 101 of the upper housing 100 of the edge banding machine. At this time, the plate 102 moves along the bonding wheel of the edge banding machine.

[0016] like Figures 2 to 8 As shown, a right-angle edge banding extrusion mechanism for sheet metal includes a thickened sleeve 1, which is fixedly connected to the bottom of a table. A limiting rotating tube 2 is rotatably connected inside the thickened sleeve. A triangular extrusion strip 22 is provided at the top of the limiting rotating tube. A rotating main shaft 3 is rotatably connected inside the limiting rotating tube. An inner fixing plate 4 is rotatably connected at the top of the rotating main shaft. A triangular connecting strip 41 is formed on one side of the inner fixing plate. The triangular extrusion strip and the triangular connecting strip are fixedly connected together. A vertical adjustment component 6 is installed on the inner fixing plate. A limiting sleeve 5 is installed on the vertical adjustment component. The limiting sleeve can move up and down along the vertical direction under the action of the vertical adjustment component.

[0017] The thickened sleeve refers to the basic component that provides stable support. It can be implemented using a tubular structure with a flange, bolted to the underside of the processing table to bear the load of the rotating parts. The limiting rotating tube is a connecting component with axial rotation capability. It can be implemented using a sleeve structure with bearings, allowing the triangular extrusion strip to rotate around the vertical axis to match the orientation of the inner angle of the sheet metal. The triangular extrusion strip is a pressure-applying component with an angular profile. It can be made of hard alloy material with a triangular cross-section, its edges able to penetrate deep into the right angles of the sheet metal to apply uniform pressure. The vertical adjustment component is the actuator that controls the extrusion height. It can be implemented using a screw lifting device with a handwheel, precisely adjusting the vertical position of the limiting sleeve through threaded transmission. Specifically, when the sheet material is moved to the inner right-angle processing position by the conveying system, the drive device drives the limiting rotating tube to rotate via sprocket transmission, so that the edge of the triangular extrusion strip aligns with the right angle of the sheet material. The rotating spindle drives the bonding wheel to rotate under the drive of the transmission sprocket. During the continuous movement of the sheet material, the triangular extrusion strip continuously applies pressure to the right-angle part of the edge banding strip, eliminating the arc-shaped gap generated by the traditional cylindrical bonding wheel. Compared to existing technologies, traditional edge banding machines using fixed cylindrical bonding wheels cannot adapt to the inner corner shapes of boards. This solution, however, achieves precise pressure application to right-angle areas through a combination of a rotatable, adjustable triangular extrusion strip and a height-adjustable limiting device. While existing technologies rely solely on material elastic deformation for bonding at right angles, this solution actively eliminates gaps through a rigid triangular structure, significantly improving the stability of edge banding quality. Through the above technical solution, this application effectively solves the technical problem of poor adhesion of the edge banding strip at the right angle of the board. The angular structure of the triangular extrusion strip can penetrate deep into the right angle to apply uniform pressure, and the height-adjustable limiting device ensures precise pressure application, completely eliminating the arc transition gap produced by traditional processes. This solution achieves high-quality edge banding processing for complex-shaped boards through modular design without changing the main structure of the original edge banding machine.

[0018] Furthermore, a single row of sprockets 21 is provided on the outer side of the bottom of the limiting rotating tube.

[0019] Among them, a single-row sprocket refers to a sprocket structure containing only a single row of toothed grooves. It can be achieved by using standard sprocket processing methods, and the power transmission path is formed by the cooperation of the chain and the drive sprocket. Specifically, a single-row sprocket is fixed to the outer bottom of the limiting rotating tube. When the motor drives the transmission sprocket, the chain drives the single-row sprocket to rotate, which in turn causes the limiting rotating tube to rotate around its axis. The rotation of the limiting rotating tube is transmitted to the right-angle area inside the board through the triangular extrusion strip connected at the top, and the extrusion action eliminates the gap between the edge banding strip and the board.

[0020] Furthermore, a transmission sprocket 32 ​​is installed at the bottom of the rotating spindle, and a contact wheel 31 is provided in the middle of the rotating spindle.

[0021] The transmission sprocket refers to a geared disc that transmits power via a chain. Specifically, it can be a steel sprocket with a module of 5, and its tooth count forms a 1:1 transmission ratio with the drive sprocket. This feature is used to synchronously transmit the rotational power of the external motor to the rotating spindle, ensuring that the rotation of the triangular extrusion strip matches the movement trajectory of the sheet material. The bonding wheel refers to a cylindrical structure with anti-slip textured surfaces, specifically a polyurethane-coated steel core wheel. This feature generates friction through contact with the edge of the sheet material, synchronously moving the sheet material along a set trajectory as the rotating spindle rotates, preventing misalignment of the edge banding strip during the extrusion process. Specifically, the transmission sprocket is connected to the drive sprocket via a single-row chain. When the motor starts, power is synchronously transmitted to the rotating spindle via the chain, enabling the spindle to rotate at a uniform speed. The bonding wheel is positioned at the axial midpoint of the spindle, with its outer edge protruding from the spindle surface to form a contact surface. When the sheet material enters the edge-sealing area, it is clamped and pushed by the bonding wheel. During the rotation of the spindle, the transmission sprocket maintains the stability of power transmission, while the bonding wheel guides the sheet material to move linearly through friction. The two work together to ensure that the angular movement of the triangular extrusion strip at the inner right angle is precisely synchronized with the sheet material's travel speed. In some embodiments, the single-row sprockets and transmission sprockets can be equivalently replaced by other drive mechanisms to drive the right-angle limiting rotating shaft and rotating main shaft to rotate, such as synchronous belt drive, gear and rack drive, etc.

[0022] Specifically, when using synchronous belt drives, synchronous pulleys must be designed at the ends of the right-angle limiting rotating shaft or rotating main shaft. The tooth profile of the synchronous pulley must be strictly matched with the synchronous belt, for example, using HTD type (circular arc tooth synchronous belt) or STD type (trapezoidal tooth synchronous belt) to ensure no tooth backlash during transmission. The preload of the synchronous belt is achieved by adjusting the position of the tensioning pulley, which is usually mounted on a movable slide rail and maintained at a constant tension by a spring or screw mechanism, thereby avoiding transmission errors caused by synchronous belt slack. In addition, synchronous belt drives must be equipped with protective covers to prevent dust or chips from entering the pulley tooth grooves and affecting transmission accuracy.

[0023] If a rack and pinion drive is used, spur gears or helical gears must be installed at the end of the right-angle limiting rotating shaft or the main rotating shaft. The module of the gears needs to be calculated and determined based on the transmission torque and speed. For example, for high-torque applications, helical gears with a module of 3-5mm can be selected, as their overlap ratio is greater than that of spur gears, effectively reducing transmission noise and improving load-bearing capacity. The rack is usually fixed to the equipment base and meshes with the gears to form a linear motion conversion mechanism. To ensure the smoothness of the rack and pinion drive, limit switches need to be installed at both ends of the rack to prevent the gears from exceeding the meshing range and causing disengagement. At the same time, the rack and pinion drive needs to be equipped with a lubrication system, such as an automatic oil dripping device or oil-based grease, to reduce tooth surface wear and extend service life.

[0024] The selection of an alternative drive mechanism requires comprehensive consideration of the equipment's operating environment, transmission accuracy, and maintenance costs. For example, in a dusty woodworking shop, synchronous belt drives are more advantageous than rack and pinion drives due to their better sealing and simpler maintenance. In scenarios requiring high-precision positioning, rack and pinion drives, due to their lack of elastic slip, can offer superior positioning accuracy compared to synchronous belt drives. Furthermore, the replacement drive mechanism must be compatible with the existing equipment's power system. For instance, if the original equipment uses sprocket drives, its motor speed and torque output must match the transmission ratio of the replacement mechanism to avoid equipment downtime or overload due to insufficient power.

[0025] Furthermore, the thickened sleeve includes a sleeve body 11, and a flange 12 is provided on the top of the sleeve body. The flange is fixedly connected to the bottom of the platform by bolts.

[0026] The flange refers to the annular disc-shaped structure located on top of the sleeve body, which can be made by stamping metal sheet, and its diameter is larger than the outer diameter of the sleeve body. This structure improves the connection stability with the bottom of the platform by increasing the contact area. The bolted connection refers to the mechanical connection between the flange and the bottom of the platform using threaded fasteners, specifically standard hexagonal bolts with nuts for locking. This method ensures that the thickened sleeve remains in a fixed position under dynamic working conditions. Specifically, the flange is rigidly connected to the bottom of the platform via bolts, ensuring that the thickened sleeve maintains the overall structural positional accuracy even when subjected to vibrations or deflection forces generated by the extrusion mechanism. The sleeve body serves as the mounting base for the limiting rotating tube, and its stability directly affects the alignment accuracy of the triangular extrusion strip with the inner right angle of the sheet metal. The combination of the flange and bolts prevents sleeve body misalignment due to mechanical vibration, thus ensuring the precise execution of the extrusion action. In at least one embodiment, the limiting sleeve includes a sleeve body 51, a top plate 52 is provided on the top of the sleeve body, and a guide groove 523, a through hole 521 and a positioning threaded hole 522 are provided on the top plate.

[0027] The sleeve body refers to the main structure supporting the limiting sleeve. It can be made of metal tubing, forming a cylindrical cavity structure to accommodate the rotating spindle and provide axial constraint. The top plate is a plate-like component fixed to the top of the sleeve body, which can be fixed by welding or bolting. It supports the guide slot and positioning threaded hole. The guide slot is a notch structure on the edge of the top plate, which can be designed with a triangular or trapezoidal cross-section to spatially mate with the rotation trajectory of the triangular extrusion strip. The through hole is a circular hole penetrating the center of the top plate, with a diameter slightly larger than the diameter of the fixed shaft, allowing the fixed shaft to pass through while maintaining clearance. The positioning threaded hole is an internally threaded hole on the top plate, evenly distributed circumferentially, used to connect the handwheel lifting shaft for height adjustment. The sleeve body is rigidly connected to the vertical adjustment assembly via the top plate. When the handwheel drives the lifting shaft to rotate, the positioning threaded hole converts the rotational motion into vertical displacement of the top plate.

[0028] Furthermore, the guide groove cooperates with the triangular extrusion strip and the triangular connecting strip. The limiting sleeve can move vertically along the triangular extrusion strip and the triangular connecting strip, thereby changing the exposed distance of the triangular extrusion strip between the limiting sleeve and the limiting rotating tube, thus making it suitable for extruding edge banding strips of different widths of sheet metal.

[0029] In at least one embodiment, the vertical adjustment assembly includes a fixed shaft 61, a position indicator 62 is mounted on the top of the fixed shaft, a handwheel lifting shaft 63 of the position indicator is threadedly connected to a positioning threaded hole 522, the fixed shaft passes through a through hole 521 and is mounted on an inner fixing plate, and a handwheel 64 is mounted on the top of the handwheel lifting shaft.

[0030] The fixed shaft refers to a rigid rod used to support and transmit adjustment force. It can be made of metal, and its axis is parallel to the vertical direction, providing a guide reference for the lifting and lowering movement of the handwheel. The position indicator is a device used to indicate the adjustment position, which can be implemented using a dial or digital display screen. It provides real-time feedback on the displacement of the handwheel lifting shaft, allowing operators to monitor the adjustment progress. The handwheel lifting shaft is a shaft with external threads, which can be driven to rotate by rotating the handwheel, thereby driving the limit sleeve for height adjustment. Specifically, when the height of the triangular extrusion bar needs to be adjusted, the handwheel is rotated to drive the handwheel lifting shaft to move spirally within the positioning threaded hole, thereby causing the limit sleeve to move axially along the fixed shaft. The position display simultaneously shows the lifting displacement, and the operator judges whether the adjustment is in place based on the scale or numerical value. Through the above technical solution, this application can adjust the height of the extrusion strip according to the specific height of the right angle inside the board, ensuring that the edge banding strip completely fits the edge of the board at the corner, effectively eliminating the gap problem caused by mechanical structure limitations, and improving the quality consistency of the edge banding process.

[0031] Furthermore, the inner fixing plate is provided with a through hole 42, and in conjunction with it, the bottom of the fixing shaft is provided with a fixing threaded hole 611, and the bolt passes through the through hole and is threaded into the fixing threaded hole.

[0032] The through hole refers to a through-hole structure formed in the inner fixing plate, which can be implemented using a circular or elliptical channel to accommodate the bolt shank. The fixed threaded hole refers to an internal threaded hole located at the bottom of the fixing shaft, which can be machined using standard thread specifications to form a detachable threaded connection with the bolt. This structure provides a stable axial locking force through thread engagement. The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A mechanism for extruding right-angle edge banding strips inside sheet metal, characterized in that, The device includes a thickened sleeve fixedly connected to the bottom of the tabletop. A limiting rotating tube is rotatably connected inside the thickened sleeve. A triangular extrusion strip is provided at the top of the limiting rotating tube. A rotating main shaft is rotatably connected inside the limiting rotating tube. An inner fixing plate is rotatably connected at the top of the rotating main shaft. A triangular connecting strip is formed on one side of the inner fixing plate. The triangular extrusion strip and the triangular connecting strip are fixedly connected together. A vertical adjustment component is installed on the inner fixing plate. A limiting sleeve is installed on the vertical adjustment component. The limiting sleeve can move up and down in the vertical direction under the action of the vertical adjustment component.

2. The extrusion mechanism for the inner right-angle edge banding strip of the sheet metal according to claim 1, characterized in that, The bottom outer side of the limiting rotary tube is provided with a single row of sprockets.

3. The extrusion mechanism for the inner right-angle edge banding strip of the sheet metal according to claim 1, characterized in that, A drive sprocket is installed at the bottom of the rotating spindle, and a contact wheel is provided in the middle of the rotating spindle.

4. The extrusion mechanism for the inner right-angle edge banding strip of the sheet metal according to claim 1, characterized in that, The thickened sleeve includes a sleeve body, and a flange is provided on the top of the sleeve body. The flange is fixedly connected to the bottom of the platform by bolts.

5. The extrusion mechanism for the inner right-angle edge banding strip of the sheet metal according to claim 1, characterized in that, The limiting sleeve includes a sleeve body, the top of which is provided with a top plate, a guide groove, a through hole and a positioning threaded hole.

6. The extrusion mechanism for the inner right-angle edge banding strip of the sheet metal according to claim 5, characterized in that, The guide groove cooperates with the triangular extrusion strip and the triangular connecting strip.

7. The extrusion mechanism for the inner right-angle edge banding strip of the sheet metal according to claim 1, characterized in that, The vertical adjustment assembly includes a fixed shaft, a position indicator is mounted on the top of the fixed shaft, the handwheel lifting shaft of the position indicator is threadedly connected to a positioning threaded hole, the fixed shaft passes through a through hole and is mounted on an inner fixing plate, and a handwheel is mounted on the top of the handwheel lifting shaft.

8. The extrusion mechanism for the inner right-angle edge banding strip of the sheet metal according to claim 7, characterized in that, The inner fixing plate is provided with a through hole, and the bottom of the fixing shaft is provided with a fixing threaded hole. After the bolt passes through the through hole, it is threaded into the fixing threaded hole.

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