An expandable scrap door, press and method of using a scrap door

Abstract

This invention relates to an expandable waste gate, a press, and a method for using the waste gate, belonging to the field of presses. The technical solution is as follows: An expandable waste gate includes a main gate panel with a hinge. The main gate panel is fixedly connected to the hinge and rotates synchronously. A drive shaft is rotatably mounted on the edge of the main gate panel away from the hinge, parallel to the hinge. A baffle is fixedly mounted on the drive shaft. An incomplete gear is connected to the hinge. An idler gear is mounted on the main gate panel, and a driven gear is mounted on the drive shaft. The idler gear meshes with the driven gear. When the incomplete gear rotates to a certain angle, it meshes with the idler gear. In this design, the baffle does not move during the initial opening of the main gate panel, avoiding interference with the waste hopper body. After opening to a preset angle, it automatically engages, allowing the baffle to precisely cover the waste splash area, expanding the receiving range and effectively preventing waste overflow. The gear transmission structure has high transmission efficiency and strong stability, ensuring precise synchronization between the baffle opening and the main gate panel opening.

Description

Technical Field

[0001] This invention relates to the field of presses, and in particular to an expandable waste gate, a press, and a method of using the waste gate. Background Technology

[0002] In the forging and pressing industry, the scrap gate is a key component of the scrap hopper system. Its function is to guide scrap material smoothly into the scrap hopper, preventing it from scattering randomly, ensuring the normal operation of the moving worktable, reducing manual cleaning workload, and maintaining a production environment that meets 5S management standards. This provides a fundamental guarantee for the efficient and safe operation of the press. Whether it's a single-process stamping operation or complex multi-station continuous production, the stable operation of the scrap gate is an important prerequisite for improving production efficiency and reducing on-site management costs.

[0003] Currently, the waste doors for presses widely used in the industry have a relatively simple structure, which is a hinged door panel structure. The core structure of this type of waste door is one or more door panels connected to the waste hopper body by hinges. The door panel size is preset according to the normal working conditions of the press workbench. Once installed, its opening range and material receiving area are fixed and cannot be adjusted according to actual production needs.

[0004] Existing fixed-size hinged scrap doors are difficult to adapt to the needs of high-speed scrap discharge in practical applications. When multi-station blanking presses use different molds for production, the shape and size of the stamping scrap vary greatly, and the discharge speed is fast and the direction is irregular. Fixed-opening scrap doors cannot effectively cover all scrap discharge paths, causing scrap to easily spill over the door panel and scatter on the work area floor, around the equipment, and in the gaps of the moving worktable guide rails. Summary of the Invention

[0005] This invention addresses the problem that current press waste gates have limited interception range and are not suitable for high-speed discharge, by providing an expandable waste gate.

[0006] To solve the above problems, the technical solution adopted by the present invention is an expandable waste gate, including a main door panel, the main door panel having a door hinge, the main door panel being fixedly connected to the door hinge and rotating synchronously, a drive shaft being rotatably mounted on the edge of the main door panel away from the door hinge, the drive shaft being parallel to the door hinge, a baffle being fixedly mounted on the drive shaft, an incomplete gear being connected to the door hinge, the incomplete gear rotating with the door hinge, an idler wheel being mounted on the main door panel, a driven gear being mounted on the drive shaft, the idler wheel meshing with the driven gear, and the incomplete gear meshing with the idler wheel when rotating to a certain angle. Through the linkage design of the door hinge and the incomplete gear, the baffle can be "expanded on demand". The baffle does not move when the main door is opened, so as to avoid interference with the waste hopper body. After opening to the preset angle, it automatically engages the transmission, allowing the baffle to accurately cover the waste splashing area. Compared with the fixed size door, it expands the material receiving range and effectively prevents waste from overflowing. The gear transmission structure has high transmission efficiency and strong stability, ensuring that the baffle opening and the main door opening are precisely synchronized without manual intervention.

[0007] As a preferred implementation of an expandable waste gate, a drive pulley is fixedly mounted on the gate shaft, and a driven pulley is also provided on the main gate plate. A transmission belt is mounted around both the drive pulley and the driven pulley. The driven pulley is coaxially arranged with the incomplete gear and can drive the incomplete gear to rotate. The belt drive structure transmits power, extending the rotational motion from the drive shaft to the outside of the main gate plate, facilitating gear arrangement. Simultaneously, the transmission process is smooth and low-noise, effectively buffering the impact load of the gate shaft rotation during stamping operations and extending the equipment's service life. The transmission belt has a certain degree of elasticity, which can compensate for installation errors, reduce the precision requirements of parts processing, and reduce manufacturing costs. Furthermore, the belt drive structure is compact, does not occupy additional space inside the main gate plate, perfectly adapts to the limited installation area of ​​the waste gate, and balances power transmission and space utilization.

[0008] As a preferred implementation of an expandable waste gate, a clutch mechanism is provided between the driven pulley and the incomplete gear. The addition of this clutch mechanism enables the waste gate to switch between two modes, allowing users to flexibly select the mode based on the shape and size of the waste and production conditions. This eliminates the need to disconnect the transmission when expanding the receiving area, avoiding wear and energy consumption caused by ineffective baffle operation. This design breaks through the limitations of traditional single-function waste gates, adapting to the diverse production needs of multi-station equipment, unloading presses, and other devices, thus improving the equipment's versatility and applicability.

[0009] As a preferred implementation of an expandable waste gate, the clutch mechanism includes a driving gear and a driven gear. The driving gear is coaxially fixedly mounted on one end face of the driven pulley, and the driven gear is coaxially fixedly mounted on one end face of the incomplete gear. A telescopic cylinder is provided on the other end face of the incomplete gear, and the incomplete gear is connected to the cylinder rod of the telescopic cylinder. When the telescopic cylinder is in the extended state, the driving gear and the driven gear contact and mesh, and the incomplete gear is coplanar with the idler gear and can mesh with the idler gear. When the telescopic cylinder is in the retracted state, the driving gear and the driven gear disengage, and the incomplete gear is misaligned with the idler gear. The gear-disc meshing structure offers rapid clutch response and high torque transmission, ensuring stable and reliable power transmission and preventing slippage and loss of rotation during transmission. A telescopic cylinder drives the gear-disc clutch to misalign with the gears, achieving precise switching of the mechanical structure. This prevents abnormal baffle movement caused by mis-meshing of gears in non-working states and avoids "tooth grinding" damage during clutch engagement, extending the service life of the gears and gear disc. The cylinder-driven method is simple in structure, easy to maintain, and suitable for harsh industrial conditions.

[0010] As a preferred implementation of an expandable waste gate, a telescopic cylinder is connected to a reversing valve. The rod-side and rodless sides of the telescopic cylinder are respectively connected to the two ports of the reversing valve via air pipes, and speed control valves are installed on the two sections of the air pipes. The reversing valve enables rapid reversing control of the telescopic cylinder, allowing for automated switching without manual operation and improving production efficiency. The bidirectional speed control valve can precisely adjust the cylinder's telescopic speed, ensuring smooth and gentle engagement and disengagement of the gear disc and avoiding damage to the gear disc and gears from impact loads. This control loop design is simple and highly reliable, and can seamlessly integrate with the existing control system of the press without the need for additional complex control modules, reducing modification and usage costs.

[0011] As a preferred implementation of an expandable waste gate, the baffle has a notch on the side near the drive shaft, which is covered by the main door panel when the baffle is in its unfolded state. Simultaneously, the notch structure reduces the overlapping area between the baffle and the main door panel, achieving a lightweight design for the baffle, reducing the load on the drive shaft and gears, and minimizing power loss. Furthermore, the lightweight baffle allows for more flexible flipping, and combined with the transmission structure, further improves the response speed of unfolding and retraction.

[0012] On the other hand, the present invention also provides a press employing the aforementioned expandable waste gate. Integrating the expandable waste gate into the press enables it to automatically expand its receiving function, solving problems such as waste splashing, difficult cleaning, and guide rail jamming in traditional presses, thereby improving the overall automation level and production continuity. It requires no major modifications to the main structure of the press, has strong installation adaptability, and can be widely used in the upgrading and assembly of new and old presses, reducing equipment replacement costs. Simultaneously, it improves the working environment of the press, reduces safety hazards, and enhances the standardization of the production site.

[0013] Thirdly, this invention also provides a method for using an expandable waste gate, comprising the following process: When the press discharges waste, the gate shaft rotates, driving the main gate plate to open. During this process, the gate shaft drives the incomplete gear to rotate via a drive pulley, a transmission belt, and a driven pulley. When the main gate plate opens to a certain extent, the incomplete gear meshes with the idler gear and drives it to rotate. The idler gear drives the driven gear to rotate, causing the baffle to flip and unfold. After the discharge is completed, the gate shaft drives the main gate plate to reverse, and the incomplete gear drives the idler gear and the driven gear to reverse, causing the baffle to flip and retract. This method achieves fully automatic linkage between the opening and closing of the waste gate and the unfolding and retraction of the baffle, requiring no manual intervention, saving auxiliary operation time, and improving production efficiency. The baffle moves synchronously with the main gate plate, accurately covering the receiving area when unfolded, and not occupying extra space when retracted, perfectly resolving the inherent contradiction between "functional expansion" and "space occupation." The reverse retraction design ensures accurate baffle reset, avoiding collisions with other components and ensuring safe and stable equipment operation.

[0014] As a preferred implementation of the expandable waste gate usage method, it also includes determining whether the baffle needs to be deployed: if so, the telescopic cylinder is extended, the active gear plate meshes with the driven gear plate, and the driven pulley drives the incomplete gear to rotate, driving the baffle to rotate; if not, the telescopic cylinder is retracted, the active gear plate disengages from the driven gear plate, the driven pulley no longer drives the incomplete gear to rotate, and the baffle remains stationary. The dual-mode switching function makes operation more flexible. For small amounts of regular waste, the expansion function can be turned off to reduce mechanical wear and energy consumption; for large amounts of irregular waste, the expansion function is turned on to ensure material receiving effect, adapting to different production scenario needs. The switching process is automatically controlled by the cylinder, with rapid response and convenient operation, requiring no machine downtime for adjustments and not affecting the continuity of the production process.

[0015] As a preferred implementation of an expandable waste gate, when the main gate is opened to its maximum extent, the outer surface of the baffle is abutted against the edge of the main gate; when the incomplete gear disengages from the idler gear, the baffle is parallel to the main gate and abutted against the inner surface of the main gate. When the baffle is extended, it abuts against the edge of the main gate, maximizing the material receiving angle and range, further improving the waste blocking effect; when retracted, it abuts against the inner surface of the main gate, resulting in a compact structure that does not occupy surrounding operating space, ensuring operator safety and convenience. The limiting design allows for precise and controllable baffle movement, avoiding structural interference and damage caused by excessive extension or retraction, extending equipment lifespan, and improving operational reliability.

[0016] As can be seen from the above technical solutions, the advantages of this invention are as follows: This solution achieves the on-demand expansion of the baffle through the linkage design of the door hinge and the incomplete gear. The main door panel avoids interference with the waste hopper body during initial opening, and automatically engages after a preset angle. Compared to a fixed-size door panel, this effectively expands the material receiving range and prevents waste overflow. Furthermore, the gear transmission ensures precise synchronization between the baffle and the main door panel, eliminating the need for manual intervention. The belt drive structure not only facilitates gear arrangement but also offers advantages such as smooth transmission, low noise, and buffering impact loads, extending the equipment's service life. Its elasticity can compensate for installation errors, reduce processing accuracy requirements and manufacturing costs. The compact structure perfectly adapts to the limited installation space of the waste hopper, balancing power transmission and space utilization. The clutch mechanism... The addition of this structure gives the waste gate a dual-mode switching function, allowing users to flexibly choose according to the characteristics of the waste and production conditions. This breaks the limitation of the traditional single-function waste gate, improving the equipment's versatility and applicability. The gear-type clutch structure responds quickly and transmits high torque, achieving precise switching in conjunction with the telescopic cylinder drive, avoiding slippage, loss of rotation, and gear damage. The cylinder drive method has a simple structure, is easy to maintain, and is suitable for harsh industrial conditions. The control circuit composed of a reversing valve and a two-way speed regulating valve enables automated and rapid reversing of the telescopic cylinder, precisely adjusting the action speed to ensure smooth and gentle engagement and disengagement of the gear. It can also seamlessly integrate with the existing control system of the press without the need for additional complex modules, reducing modification and usage costs. The notch in the baffle is designed with... The design minimizes the overlap area with the main door panel, achieving a lightweight design that reduces the load and power loss on transmission components. It also allows for more flexible and faster baffle rotation. Integrating this expandable waste door into the press requires no major structural modifications, offering strong installation adaptability. It can be widely used in upgrading existing and new presses, effectively solving problems such as waste splashing, difficult cleaning, and guide rail jamming in traditional presses. This improves equipment automation and production continuity, reduces equipment upgrade costs, improves the working environment, reduces safety hazards, and enhances production site standardization. Its operation achieves fully automatic linkage between the waste door and baffle, saving auxiliary operation time, increasing production efficiency, and perfectly resolving the inherent contradiction between functional expansion and space occupancy. The reverse retraction design ensures precise baffle reset and safe and stable operation. The dual-mode switching function makes operation more flexible. For small amounts of regular waste, the expansion function can be turned off to reduce mechanical wear and energy consumption. For large amounts of irregular waste, the expansion function can be turned on to ensure material receiving effect, adapting to the needs of different production scenarios. The switching process is automatically controlled and responds quickly without stopping the machine for adjustment, and does not affect the continuity of production. The baffle's limiting design maximizes the material receiving angle and range when unfolded, improving the waste blocking effect. When retracted, the structure is compact and does not occupy operating space, ensuring the safety and convenience of operators. At the same time, it makes the baffle's movement stroke precise and controllable, avoiding structural interference and damage, extending the service life of the equipment and improving operational reliability. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this patent, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this patent. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of the present invention.

[0019] Figure 2 This is a side view of the overall embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the transmission part in a specific embodiment of the present invention.

[0021] Figure 4 This is a pneumatic circuit diagram of the telescopic cylinder in a specific embodiment of the present invention.

[0022] Explanation of main figure symbols

[0023] 00. Main door panel, 1. Door hinge, 2. Drive pulley, 3. Drive belt, 4. Driven pulley, 5. Incomplete gear, 6. Spherical bearing, 7. Telescopic cylinder, 8. Clutch mechanism, 8-1. Drive gear, 8-2. Driven gear, 9. Idler gear, 10. Driven gear, 11. Drive shaft, 12. Bearing with seat, 13. Rotating rod, 14. Expansion sleeve, 15. Baffle, 16. Speed ​​control valve, 17. Reversing valve, 18. Air pipe, 19. Notch. Detailed Implementation

[0024] To make the objectives, features, and advantages of this patent more apparent and understandable, the technical solutions of this patent will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this patent, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0025] Example 1

[0026] like Figure 1-2As shown, an expandable waste gate includes a main door panel 00. The main door panel 00 has a door hinge 1, and the main door panel 00 is fixedly connected to the door hinge 1 and rotates synchronously. A transmission shaft 11 parallel to the door hinge 1 is rotatably mounted on the edge of the main door panel 00 away from the door hinge 1 via a bearing 12. Rotating rods 13 are respectively mounted on both ends of the transmission shaft 11 via expansion sleeves 14. The two rotating rods 13 are parallel to each other and perpendicular to the transmission shaft 11. A baffle 15 is fixedly installed between the two rotating rods 13. The baffle 15 has a notch 19 on the side near the transmission shaft 11. When the baffle 15 is in the unfolded state, the notch 19 is covered by the main door panel 00. This notch design effectively reduces the overlapping area of ​​the baffle 15 and the main door panel 00, realizing the lightweighting of the baffle 15. This reduces the load on the transmission shaft 11 and subsequent transmission gears, reduces power loss, and makes the flipping of the baffle 15 more flexible, further improving the response speed of unfolding and retracting. A drive pulley 2 is fixedly installed on the door hinge 1, and a driven pulley 4 is also provided on the main door plate 00. A transmission belt 3 is installed around the drive pulley 2 and the driven pulley 4. The belt drive structure transmits power, which not only facilitates the reasonable arrangement of subsequent gears, but also ensures smooth transmission and low noise. It can effectively buffer the impact load generated by the rotation of the door hinge 1 during the stamping operation, significantly extending the service life of the equipment. At the same time, the transmission belt 3 has a certain degree of elasticity, which can compensate for installation errors, reduce the requirements for the machining accuracy of parts, and reduce manufacturing costs. Its compact structure will not occupy additional space inside the main door plate 00, perfectly adapting to the limited installation area of ​​the scrap door, and balancing power transmission efficiency and space utilization. The door hinge 1 is also connected to an incomplete gear 5. The incomplete gear 5 is coaxially arranged with the driven pulley 4 and can be driven to rotate by it. The incomplete gear 5 will rotate synchronously with the door hinge 1. An idler wheel 9 is installed on the main door plate 00, and a driven gear 10 is installed on the transmission shaft 11. The idler wheel 9 meshes with the driven gear 10. When the incomplete gear 5 rotates to a certain angle, it will mesh with the idler wheel 9. Through the linkage design of the door hinge 1 and the incomplete gear 5, the baffle 15 can be unfolded as needed. When the main door plate 00 is opened, the baffle 15 remains stationary to avoid interference with the waste hopper body. After opening to a preset angle, it automatically engages and drives, allowing the baffle 15 to accurately cover the waste splashing area. Compared with traditional fixed-size door plates, it effectively expands the material receiving range and eliminates waste overflow from the source. Moreover, the gear transmission structure has high transmission efficiency and strong stability, ensuring that the unfolding of the baffle 15 and the opening action of the main door plate 00 are precisely synchronized without manual intervention.

[0027] like Figure 3As shown, a clutch mechanism 8 is provided between the driven pulley 4 and the incomplete gear 5. The clutch mechanism 8 includes a driving gear 8-1 and a driven gear 8-2. The driving gear 8-1 is coaxially fixedly mounted on one end face of the driven pulley 4, and the driven gear 8-2 is coaxially fixedly mounted on one end face of the incomplete gear 5. A telescopic cylinder 7 is provided on the other end face of the incomplete gear 5, and the cylinder rod of the incomplete gear 5 and the telescopic cylinder 7 are connected through a spherical bearing 6. When the telescopic cylinder 7 is in the extended state, the driving gear 8-1 and the driven gear 8-2 contact and mesh, and the incomplete gear 5 is coplanar with the idler gear 9. When the telescopic cylinder 7 is in the retracted state, the driving gear 8-1 and the driven gear 8-2 disengage, and the incomplete gear 5 is misaligned with the idler gear 9. The gear-type meshing structure has a rapid clutch response and transmits large torque, which can ensure stable and reliable power transmission and avoid slippage and loss of rotation during transmission. By driving the gear clutch and gear misalignment through the telescopic cylinder 7, the precise switching of the mechanical structure can be achieved. This not only prevents the abnormal operation of the baffle 15 caused by mis-meshing of gears in non-working states, but also avoids gear damage during clutching, extending the service life of gears and gear discs. Moreover, the cylinder drive method has a simple structure, is easy to maintain, and is suitable for harsh working conditions in industrial sites.

[0028] like Figure 4 As shown, the telescopic cylinder 7 is connected to a reversing valve 17. The rod-side and rodless sides of the telescopic cylinder 7 are respectively connected to the two ports of the reversing valve 17 via air pipes 18. Speed ​​control valves 16 are respectively installed on the two sections of the air pipes 18. The reversing valve 17 can realize the rapid reversing control of the telescopic cylinder 7. With the original control system of the press, it can realize automatic switching without manual operation, effectively improving production efficiency. The bidirectional speed control valves 16 can accurately adjust the telescopic speed of the telescopic cylinder 7, ensuring a smooth and gentle engagement and disengagement process of the gear plate, avoiding damage to the gear plate and gears caused by impact loads. The entire control loop design is simple and highly reliable, and can be seamlessly integrated with the original control system of the press without the need for additional complex control modules, reducing equipment modification and usage costs.

[0029] Example 2

[0030] Based on the expandable waste gate provided in Embodiment 1, this embodiment further provides a press that uses the expandable waste gate described in Embodiment 1.

[0031] In this embodiment, the waste gate can be expanded to replace the original simple waste gate position. It is rotatably connected to the main body of the press through the gate shaft 1. This is the conventional structure of the waste gate, which will not be described in detail here.

[0032] The press in this embodiment has an automatic expansion receiving function, which solves the problems of waste splashing, difficult cleaning, and guide rail jamming in traditional presses, and improves the overall automation level and production continuity of the equipment. It does not require major modifications to the main structure of the press, has strong installation adaptability, and can be widely used for upgrading and assembling new and old presses, reducing equipment replacement costs. At the same time, it improves the working environment of the press, reduces safety hazards, and improves the standardization level of the production site.

[0033] Example 3

[0034] This embodiment provides a method for using an expandable waste gate, including the following process:

[0035] First, determine whether the baffle 15 needs to be unfolded: if so, control the extension cylinder 7 to extend, the active gear 8-1 and the driven gear 8-2 mesh, and the driven pulley 4 can drive the incomplete gear 5 to rotate. When the press discharges waste material, the door shaft 1 rotates to drive the main door plate 00 to open. During this process, the door shaft 1 drives the incomplete gear 5 to rotate through the active pulley 2, the transmission belt 3 and the driven pulley 4. When the main door plate 00 is opened to a certain extent, the incomplete gear 5 meshes with the idler wheel 9 and drives it to rotate. The idler wheel 9 drives the driven gear 10 to rotate, causing the baffle 15 to flip and unfold. After the material discharge is completed, the door shaft drives the main door plate 00 to reverse, and the incomplete gear 5 drives the idler wheel 9 and the driven gear 10 to reverse, causing the baffle 15 to flip and retract.

[0036] If not, the telescopic cylinder 7 retracts, the active gear 8-1 and the driven gear 8-2 disengage, the driven pulley 4 no longer drives the incomplete gear 5 to rotate, during the opening and closing of the main door panel 00, the driven pulley 4 spins freely, the incomplete gear 5 does not rotate, and the baffle 15 remains stationary under the action of the idler wheel 9.

[0037] Furthermore, the transmission relationship between the incomplete gear 5, the idler gear 9, and the driven gear 10 is configured as follows: when the main door panel 00 is opened to its maximum extent, the outer surface of the baffle 15 is in contact with the edge of the main door panel 00; when the incomplete gear 5 disengages from the idler gear 9, the baffle 15 is parallel to the main door panel 00 and in contact with the inner surface of the main door panel 00.

[0038] Taking the production of automotive parts by press stamping as an example, the specific implementation process of this method is as follows:

[0039] First, before starting the press, the operator determines whether the baffle 15 expansion function needs to be activated based on the stamping process of the mold used in this production, the expected shape of the scrap, and the discharge volume. If the production involves continuous feeding at multiple stations, and the scrap is irregular in shape and discharged quickly, the expansion function needs to be activated, and an instruction is issued through the control system. If it is a single-process stamping, and the scrap is small and regular, the expansion function is not needed, and it remains in the default off state.

[0040] When the extended function is activated, the press control system receives the activation command and controls the reversing valve 17 to operate, causing the rodless chamber of the telescopic cylinder 7 to take in air and the rod chamber to exhaust air. The telescopic cylinder 7 extends, pushing the incomplete gear 5 to move towards the driven pulley 4 until the driving gear 8-1 and the driven gear 8-2 are fully engaged. At this time, the incomplete gear 5 and the idler gear 9 are in a coplanar state and have the conditions for engagement.

[0041] The press begins stamping operations. When a stamping cycle is completed and waste material needs to be discharged, the press control system sends a waste gate opening signal, driving the gate shaft 1 to rotate. The gate shaft 1 drives the main gate plate 00 to open synchronously. During the rotation of the gate shaft 1, the drive pulley 2 fixed on it rotates synchronously, driving the driven pulley 4 to rotate via the transmission belt 3. Since the drive gear 8-1 and the driven gear 8-2 are in a meshing state, the driven pulley 4 drives the incomplete gear 5 to rotate synchronously. In the initial stage of opening the main gate plate 00, the toothless part of the incomplete gear 5 faces the idler gear 9, and the two are not meshed. The baffle 15 remains stationary to avoid interference with the waste hopper body. When the main gate plate 00 opens to the preset width... When the angle is 60°, the toothed part of the incomplete gear 5 rotates to the position corresponding to the idler wheel 9 and begins to mesh. Power is transmitted to the idler wheel 9 through the incomplete gear 5. The idler wheel 9 drives the driven gear 10 that meshes with it to rotate. The driven gear 10 drives the transmission shaft 11 to rotate synchronously, which in turn drives the baffle 15 fixed on the transmission shaft 11 to flip and unfold. When the main door panel 00 is opened to the maximum extent (e.g., 90°), with the precise transmission ratio of the incomplete gear 5, the idler wheel 9 and the driven gear 10, the outer surface of the baffle 15 is in close contact with the edge of the main door panel 00, forming a maximum material receiving range, completely blocking the splashed waste material, and ensuring that the waste material falls smoothly into the waste hopper.

[0042] After the material discharge is completed, the press control system sends a waste gate closing signal. The gate shaft 1 drives the main gate plate 00 to reverse. The incomplete gear 5 reverses synchronously with the gate shaft 1, and drives the transmission shaft 11 to rotate in the opposite direction through the idler wheel 9 and the driven gear 10. The baffle 15 follows and flips back. When the main gate plate 00 is closed to a certain angle, the incomplete gear 5 disengages from the idler wheel 9, the baffle 15 stops moving, and finally becomes parallel to the main gate plate 00 and abuts against the inner surface of the main gate plate 00, completing one material discharge cycle.

[0043] When the extended function is closed, after receiving the closing command, the control system controls the reversing valve 17 to reverse, causing the rod chamber of the telescopic cylinder 7 to take in air and the rodless chamber to exhaust air. The telescopic cylinder 7 retracts, pulling the incomplete gear 5 away from the driven pulley 4. The driving gear 8-1 disengages from the driven gear 8-2. At this time, the incomplete gear 5 and the idler gear 9 are misaligned and cannot mesh. During the press operation, when the main door plate 00 is opened, the door shaft 1 drives the driving pulley 2, the transmission belt 3 and the driven pulley 4 to rotate. However, since the driving gear 8-1 and the driven gear 8-2 have disengaged, the driven pulley 4 is in an idle state and cannot drive the incomplete gear 5 to rotate. The incomplete gear 5 remains stationary, and the idler gear 9, the driven gear 10 and the transmission shaft 11 do not move. The baffle 15 always remains in contact with the main door plate 00, and the main door plate 00 completes the opening, discharging and closing actions in the conventional manner.

[0044] If molds need to be changed or processes need to be adjusted during production, operators can switch the extended function status in real time through the press control system. The control system responds quickly and controls the telescopic cylinder 7 to engage or disengage the active gear plate 8-1 and the driven gear plate 8-2 without stopping the machine for adjustment, thus not affecting the continuity of the production process.

[0045] As can be seen from the above technical solutions, the beneficial effects of the present invention are as follows:

[0046] This solution uses the precise meshing control of incomplete gears and idler wheels to enable the baffle to open and retract as needed. After the main door panel is opened to a preset angle, the baffle automatically flips and, at its maximum extent, it abuts against the edge of the main door panel to form the maximum material receiving range. This effectively blocks irregular, high-speed splashing waste generated by multi-station presses, completely solving the problem of waste overflow from traditional fixed-size door panels and preventing waste from scattering into the work area and guide rail gaps.

[0047] It features dual-mode switching between expansion and normal operation, allowing for flexible selection based on waste volume, shape, and production conditions. When expansion is not required, the baffle remains stationary, reducing mechanical wear and energy consumption. Switching is automatically controlled by a telescopic cylinder, providing rapid response without the need for machine downtime for adjustments. It adapts to diverse production needs of different molds and processes, enhancing the equipment's versatility.

[0048] The belt drive structure provides smooth noise reduction and shock absorption, which can compensate for installation errors and reduce processing and manufacturing costs; the toothed disc clutch mechanism transmits large torque and switches precisely, avoiding slippage and tooth damage; the cylinder drive, in conjunction with the control circuit of the directional valve and speed control valve, enables automated operation and can be seamlessly integrated with the original press system without the need for additional complex modules. It has a compact structure, occupies little space, has low maintenance costs, and is suitable for harsh industrial working conditions.

[0049] The baffle unfolds and retracts in tandem with the main door panel, requiring no manual intervention. This reduces auxiliary time for waste removal and equipment adjustment, avoids malfunctions such as guide rail jamming, and improves production continuity. After retraction, the baffle rests against the main door panel, without occupying operating space, ensuring worker safety and improving the production environment.

[0050] The above description of the disclosed embodiments enables those skilled in the art to implement or use this patent. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this patent. Therefore, this patent is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An expandable waste gate, comprising a main door panel (00) having a door hinge (1), characterized in that, The main door panel (00) is fixedly connected to the door hinge (1) and rotates synchronously. A drive shaft (11) is rotatably installed on the edge of the main door panel (00) away from the door hinge (1). The drive shaft (11) is parallel to the door hinge (1). A baffle (15) is fixedly installed on the drive shaft (11). An incomplete gear (5) is connected to the door hinge (1). The incomplete gear (5) rotates with the door hinge (1). An idler wheel (9) is installed on the main door panel (00). A driven gear (10) is installed on the drive shaft (11). The idler wheel (9) meshes with the driven gear (10). When the incomplete gear (5) rotates to a certain angle, it meshes with the idler wheel (9).

2. The expandable waste gate according to claim 1, characterized in that, A drive pulley (2) is fixedly installed on the door hinge (1), and a driven pulley (4) is also provided on the main door panel (00). A transmission belt (3) is installed around the drive pulley (2) and the driven pulley (4). The driven pulley (4) is coaxially arranged with the incomplete gear (5) and can drive the incomplete gear (5) to rotate.

3. The expandable waste gate according to claim 2, characterized in that, A clutch mechanism (8) is provided between the driven pulley (4) and the incomplete gear (5).

4. The expandable waste gate according to claim 3, characterized in that, The clutch mechanism (8) includes a driving gear plate (8-1) and a driven gear plate (8-2). The driving gear plate (8-1) is coaxially fixedly installed on one side end face of the driven pulley (4). The driven gear plate (8-2) is coaxially fixedly installed on one side end face of the incomplete gear (5). The other side end face of the incomplete gear (5) is provided with a telescopic cylinder (7). The incomplete gear (5) is connected to the cylinder rod of the telescopic cylinder (7). When the telescopic cylinder (7) is in the extended state, the driving gear (8-1) and the driven gear (8-2) contact and mesh, and the incomplete gear (5) is coplanar with the idler gear (9) and can mesh with the idler gear (9); when the telescopic cylinder (7) is in the retracted state, the driving gear (8-1) and the driven gear (8-2) disengage, and the incomplete gear (5) is misaligned with the idler gear (9).

5. The expandable waste gate according to claim 4, characterized in that, The telescopic cylinder (7) is connected to a reversing valve (17). The rod chamber and rodless chamber of the telescopic cylinder (7) are respectively connected to the two ports of the reversing valve (17) through air pipes (18). Speed ​​regulating valves (16) are respectively installed on the two sections of air pipes (18).

6. The expandable waste gate according to claim 4, characterized in that, The baffle (15) has a notch (19) on the side near the drive shaft (11). When the baffle (15) is unfolded, the notch (19) is covered by the main door panel (00).

7. A press, characterized in that, The scalable waste gate as described in any one of claims 1-6 is adopted.

8. A method of using an expandable waste gate according to any one of claims 4-6, characterized in that, The process includes the following: When the press discharges waste material, the door shaft (1) rotates and drives the main door plate (00) to open. During this process, the door shaft (1) drives the incomplete gear (5) to rotate through the driving pulley (2), transmission belt (3) and driven pulley (4). When the main door plate (00) is opened to a certain extent, the incomplete gear (5) meshes with the idler wheel (9) and drives it to rotate. The idler wheel (9) drives the driven gear (10) to rotate, causing the baffle (15) to flip and unfold. After the material discharge is completed, the door hinge drives the main door plate (00) to reverse, and the incomplete gear (5) drives the idler wheel (9) and the driven gear (10) to reverse, causing the baffle (15) to flip and retract.

9. The method of using the expandable waste gate according to claim 8, characterized in that, It also includes determining whether the baffle (15) needs to be unfolded: If so, the telescopic cylinder (7) is extended, the active gear plate (8-1) meshes with the driven gear plate (8-2), the driven pulley (4) drives the incomplete gear (5) to rotate, and the drive baffle (15) rotates; If not, the telescopic cylinder (7) retracts, the driving gear (8-1) and the driven gear (8-2) disengage, the driven pulley (4) no longer drives the incomplete gear (5) to rotate, and the baffle (15) remains stationary.

10. The method of using the expandable waste gate according to claim 8, characterized in that, When the main door panel (00) is opened to its maximum extent, the outer surface of the baffle (15) is in contact with the edge of the main door panel (00); when the incomplete gear (5) disengages from the idler gear (9), the baffle (15) is parallel to the main door panel (00) and in contact with the inner surface of the main door panel (00).

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