A new type of rice seedling tray forming device

Abstract

The application relates to the technical field of agricultural machinery, and discloses a novel rice seedling tray forming device, which comprises a support, an electric control box, a film roll arranged at the bottom of one end of the support, a tensioning and clamping assembly arranged on the support above the film roll, a conveying assembly arranged on the tensioning and clamping assembly, a film cutting device arranged on the conveying assembly in sequence, a pre-punching assembly, a film heating device, a seedling tray forming assembly and a seedling tray cooling device. The film roll is tensioned and clamped and synchronous deviation is rectified through the segmented independent servo driving of the tensioning and clamping assembly and the conveying assembly, the synchronous pre-punching assembly and the seedling tray forming assembly and the independent driving of the film cutting device are used to realize the emergency film cutting and line breaking mechanism, the film heating device is additionally arranged, and the seedling tray cooling device is used for online forced cooling. The novel rice seedling tray forming device effectively solves the technical problems of poor precision, weak stability, single material adaptation, poor shaping effect, low production efficiency and complicated type changing of the existing seedling tray forming equipment, and has good practical popularization and application value.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, specifically to a novel rice seedling tray forming device. Background Technology

[0002] Mechanized rice seedling raising is a crucial foundation for large-scale modern agricultural planting. The seedling tray forming mechanism, as a core upstream device in the seedling raising production line, directly impacts seedling cultivation quality and machine transplanting results in terms of its forming accuracy, production efficiency, and adaptability. Currently, the main types of seedling tray forming equipment in China include: For example, CN118163332A discloses a thermoforming device for seedling trays used in agricultural breeding. This device uses a hydraulic cylinder to drive mold closing and a motor to transport the sheet material. It can only process thick, rigid plastic sheets and cannot meet the continuous production needs of ultra-thin film rolls. The entire machine uses a single power source to control all processes, making it impossible to independently and precisely control the timing of feeding, heating, forming, and cutting. The sheet material conveying tension is unstable, easily leading to stretching and deviation, resulting in uneven wall thickness, cracking, and deformation of the formed trays, resulting in a high product defect rate. This type of equipment uses intermittent single-mold production, resulting in long forming cycles, low material utilization, and reliance on natural cooling for shaping after the seedling trays are formed. This makes it highly susceptible to quality defects such as springback, collapse, and tray warping, leading to poor forming stability.

[0003] Existing simple film seedling tray forming equipment mostly adopts a single servo integrated transmission structure, with film feeding, heating, forming, and punching sharing a single power system. The coordination of each process is poor, each functional module cannot be independently controlled, and specification changes and adjustments are cumbersome. The degree of automation and production adaptability are low. Moreover, when processing ultra-thin film materials, existing equipment is prone to defects such as film stretching, wrinkling, deviation, tearing, uneven film heating, poor consistency of seedling tray forming depth, lack of rapid shaping methods after forming, and severe rebound deformation of seedling trays.

[0004] In addition, the temperature of the heating station in existing equipment mostly relies on manual experience to set. When the film conveying and seedling tray forming speeds change, the temperature cannot be automatically adjusted, which can easily cause quality defects such as uneven film heating, overheating and whitening, or underheating. There is an urgent need for an intelligent control solution that can automatically adjust the heating temperature according to the running speed and ensure that all drive components operate synchronously.

[0005] In summary, existing seedling forming mechanisms generally suffer from numerous technical drawbacks, such as low power control precision, high energy consumption, poor adaptability to ultra-thin film forming, lack of online shaping and cooling functions, low process integration, poor product forming consistency, and low changeover efficiency. These shortcomings make it difficult to meet the modern production demands for continuous, high-speed, and high-precision forming of film seedling trays. Therefore, it is urgent to design a new type of seedling forming mechanism with optimized structure to address the deficiencies of existing technologies. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a novel rice seedling tray forming device. It features segmented, independently servo-driven film tensioning and clamping components and a conveying component for tensioning and clamping the film while simultaneously correcting deviations; independently driven synchronous pre-punching hole components and seedling tray forming components; an independently driven film cutting device with an emergency film cutting and thread breaking mechanism; an auxiliary film heating device; and an online forced cooling device for the seedling tray. The device boasts a simple and compact structure, stable operation, high forming accuracy, low energy consumption, and strong adaptability, demonstrating significant practical application value. This invention overcomes the related problems in the aforementioned background technologies.

[0007] To achieve the above objectives, this application adopts the following technical solution: a novel rice seedling tray forming device, comprising... The bracket has an electrical control box on one side; The film roll is placed at the bottom of one end of the support frame; The tensioning and clamping assembly is installed on the support above the film roll to tension and clamp the opened film; A conveying assembly is located behind the tensioning and clamping assembly. A conveying motor adapter is provided on one side of the support of the conveying assembly to drive the film to move backward and convey it. The other side is controllably connected to the tensioning and clamping assembly through a transmission chain. Pre-stamping hole assembly, for pre-stamping bottom holes on the film of the conveying assembly; The seedling tray forming component is located behind the pre-punching hole component and presses the film of the pre-punching bottom hole into shape. One side of the seedling tray forming component is equipped with a matching forming motor, and the other side of the seedling tray forming component is connected to the pre-punching hole component through a transmission chain. The film cutting device is located at the film output point behind the tensioning and clamping assembly, and is configured to cut off the film conveying in case of film conveying or forming failure.

[0008] Further improvements: The tensioning and clamping assembly includes: a guide feeding roller mounted on the support above the front of the film roll, a tensioning roller mounted parallel to the guide feeding roller, and a clamping mechanism mounted on the rear side of the tensioning roller; the clamping mechanism consists of a drive shaft, fixed plates mounted on both sides of the drive shaft, and transmission clamping wheel sets correspondingly mounted on the inner sides of the two fixed plates. The transmission clamping wheel sets consist of two sets of parallel pressure rollers, which are mutually driven by gears. The transmission clamping wheel sets clamp and roll forward to transport the opened film to the conveying assembly; the two fixed plates are respectively fixedly connected to the support, and an adjusting plate for adjusting the clamping gap of the transmission clamping wheels is adapted to one side of the fixed plate; a sprocket adapted to the transmission chain is provided on one side of the drive shaft, and a clutch that is linked to the film cutting device is provided inside the sprocket.

[0009] Further improvements: The conveying assembly includes: a drive wheel shaft mounted on a support, a driven wheel shaft correspondingly mounted on the support behind the drive wheel shaft, and a conveying chain. One end of the drive wheel shaft is adapted to and connected to a conveying motor, and the other end is connected to a drive shaft via a transmission chain. Sprockets adapted to the conveying chain are provided on both sides of the drive wheel shaft and the driven wheel shaft. Multiple transition tensioning wheels are symmetrically arranged below the drive wheel shaft and the driven wheel shaft. A film support plate is also provided between the two conveying chains. The film support plate extends from the clamping mechanism to the input end of the seedling tray forming assembly. The film support plate is fixedly connected to the support via a support connecting frame.

[0010] Further improvements: The conveyor chain is provided with multiple positioning pins at equal intervals to drive the two sides of the film to move forward synchronously. The film pressure rollers are also symmetrically provided above the drive wheel shaft and behind the conveying end of the conveyor chain.

[0011] Further improvements: The pre-punching assembly includes: a punching pressure roller and a punching roller arranged parallel to each other. The punching pressure roller and the punching roller are connected to the bracket on both sides through bearing fixing plates. Multiple punching needles are evenly distributed on the roller surface of the punching roller. One end of the punching roller is provided with a punching connecting sprocket adapted to the transmission chain and is connected to the seedling tray forming assembly for transmission. The other end of the punching roller is driven by the punching pressure roller through gear meshing. The roller surface of the punching pressure roller is provided with a relief ring groove adapted to the punching needles. The bearing fixing plate is also provided with oblong adjustment mounting holes symmetrically arranged vertically.

[0012] Further improvements: The film output position on one side of the punching roller is also provided with a film lifting structure. One side of the film lifting structure abuts against the film support plate, and the other side is provided with multiple film lifting pieces that fit and adhere to the arc surface of one side of the punching roller.

[0013] Further improvements: The seedling tray forming assembly also includes: a forming convex roller and a forming concave roller mounted parallel to each other on the support. The two sides of the forming convex roller and the forming concave roller are tunably connected to the support through adjusting seats. One end of the forming convex roller and the forming concave roller are respectively provided with forming roller gears that mesh with each other. The other end of the forming convex roller is adapted and driven by a forming motor. The perforated film is conveyed by a conveyor chain to be rolled and formed between the forming convex roller and the forming concave roller.

[0014] Further improvements: The film cutting device includes: a film cutting drive motor fixed on one side of the support, a film cutting drive pulley connected to the output end of the film cutting drive motor, a film cutting driven pulley correspondingly arranged on the other side of the support, a transmission belt sleeved on the film cutting drive pulley and the film cutting driven pulley, and a cutting blade assembly fixedly arranged at the lower part of the transmission belt and reciprocating with the transmission belt; the film cutting driven pulley is connected to the support through a pulley adjustment seat.

[0015] Further improvements: A guide sliding mechanism adapted to the cutter assembly is also provided between the active pulley and the driven pulley of the film cutting assembly. The guide sliding mechanism consists of a guide slide rod and a slide rail seat. The guide slide rod is suspended between the upper and lower transmission surfaces of the transmission belt by a bracket. The cutter assembly is slidably connected to the sliding guide rod through the slide rail seat. The transmission belt is fixedly connected to the cutter assembly through the slide rail seat. The sliding guide rod is mounted parallel between the upper and lower belt surfaces of the transmission belt.

[0016] Further improvements include a film heating device and a seedling tray cooling device. The film heating device is positioned between the pre-punching assembly and the seedling tray forming assembly to heat and soften the film after punching. The seedling tray cooling device is positioned behind the seedling tray forming assembly to cool and shape the formed seedling tray structure. The film heating device, the seedling tray cooling device, the conveying motor, the forming motor, and the film cutting drive motor are electrically connected to the electrical control box. The conveying motor, the forming motor, and the film cutting drive motor are configured as servo drive motors.

[0017] Further improvements: The electrical control box includes a central controller and a remote controller; the central controller automatically adjusts the heating temperature of the film heating device according to the running speed of the conveying motor and the forming motor, so that the heating temperature is increased when the film conveying and seedling tray forming speed is increased, and the heating temperature is decreased when the speed is decreased.

[0018] Further improvements: The conveying motor, forming motor, and film cutting drive motor are all servo drive motors and are each equipped with a servo controller; the central controller calculates the actual operating speed difference between the conveying motor and the forming motor based on the pulse quantity fed back by the two servo controllers, and adjusts the drive pulse quantity sent to the two servo controllers to keep the film conveying speed synchronized with the seedling tray forming speed.

[0019] Further improvements: The thin-film heating device includes: a heating hood, a heater disposed inside the heating hood, and a heating adjustment structure. An electric ball valve is provided on the gas pipeline connected to the heating adjustment structure. A temperature measuring resistor is also provided inside the heating hood. The temperature measuring resistor is electrically connected to a temperature controller. The temperature controller outputs a current signal to the central controller based on the temperature signal fed back by the temperature measuring resistor. The central controller controls the opening size of the electric ball valve to adjust the gas flow rate based on the current signal. A flow meter is also provided on the gas pipeline where the electric ball valve is located. The flow meter feeds back the actual gas flow rate signal to the central controller until the heating temperature reaches and is maintained at the set temperature.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1. By sequentially setting up a controllable tensioning and clamping assembly and a conveying assembly on the frame, the film is tensioned, flattened, clamped, and conveyed under constant tension. An independently controlled film cutting device is installed on the conveying assembly at the rear of the tensioning and clamping assembly to handle faulty film breaks. The pre-punching hole assembly and seedling tray forming assembly are independently servo-driven in segments, replacing the traditional single-machine linkage and hydraulic drive methods. The timing of each process is independently controllable and precisely coordinated. This effectively solves the problems of film stretching, deviation, and poor synchronization caused by the single-power transmission of traditional equipment. It ensures uniform film conveying tension, high consistency in seedling tray forming dimensions, significantly reduces defects such as seedling tray deformation, cracking, and hole misalignment, and significantly improves product forming accuracy and pass rate. The machine operates with low noise and low energy consumption, resulting in a cleaner and more environmentally friendly production environment. 2. The controllable and interconnected tensioning and clamping components and conveying components can independently tension, clamp and correct the unfolded film, and can perform full-process limit correction and conveying of the unfolded film, ensuring that the film does not wrinkle or shift during high-speed continuous conveying, and can stably produce thinner films. 3. The film cutting device can be set up to start the film cutting drive motor when there is a problem with the seedling tray forming, so as to cut and separate the film in time and effectively avoid the waste of production and materials caused by the continued conveying of film; 4. A film heating device is installed, which can independently adjust the heating temperature according to the film thickness and forming requirements, so that the film is heated evenly and softens uniformly, avoiding defects such as uneven forming depth and local tearing caused by local overheating and hardening. This ensures that the forming shape of each group of seedling trays is uniform and the forming quality is stable and controllable. A dedicated online forced cooling mechanism is installed, which can immediately and quickly set the shape after the seedling tray is hot-pressed, effectively suppressing problems such as film seedling tray rebound, collapse, and warping. The setting effect is good and the forming stability is strong, effectively improving the defects of poor setting and high scrap rate. 5. The integrated structure of synchronous hole cutting and seedling tray forming allows for simultaneous forming and hole punching, with tight process connections. It eliminates the need for secondary transfer of semi-finished products, significantly improving the automation level and production efficiency of the production line. 6. Each functional module of this device is independently controllable, and the operating parameters can be quickly adjusted according to different film specifications and different seedling tray sizes. It is convenient to change and debug, highly flexible in production, compact in structure, strong in continuous production capacity, and significantly improves production efficiency and material utilization. It can fully adapt to the high-speed production needs of modern fully automatic and large-scale seedling production lines.

[0021] 7. This application may also include a central controller that automatically adjusts the heating temperature of the heating mechanism based on the actual operating speeds of the drive motors of the conveying mechanism and the pressure roller drive motors of the roll forming mechanism. This ensures that the heating temperature increases synchronously when the film conveying and seedling tray forming speeds up and decreases synchronously when the speeds decrease, avoiding adjustment lag and temperature fluctuations caused by manual judgment. Furthermore, both the drive motor and the pressure roller drive motor are servo motors equipped with servo controllers. The central controller automatically calculates and adjusts the drive pulse quantity based on the feedback pulse quantity, ensuring that the film conveying speed and the seedling tray forming speed remain synchronized. This further enhances the stability and automation of seedling tray forming and reduces manual intervention. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of one side of the present invention; Figure 2 This is a schematic diagram of another side of the invention; Figure 3 This is a schematic diagram of the cross-sectional structure of this utility model; Figure 4 This is a three-dimensional schematic diagram of the installation of the various internal devices of this invention; Figure 5 This is a schematic diagram of the clamping mechanism of the present invention; Figure 6 This is a schematic diagram of the pre-punch hole assembly of the present invention; Figure 7 This is a schematic diagram of the membrane structure installation of the present invention; Figure 8 This is a three-dimensional schematic diagram of the membrane structure of the present invention; Figure 9 This is a schematic diagram of the seedling tray forming component of the present invention; Figure 10 This is a schematic diagram of the film cutting device of the present invention; Figure 11 This is a partially enlarged three-dimensional schematic diagram of the film cutting device of the present invention; Figure 12 This is the electrical control schematic diagram of the present invention; Figure 13 This is a flowchart of the control system of the present invention.

[0023] Attached image labels: 1. Support frame; 10. Film roll; 2. Electrical control box; 21. Central controller; 22. Remote controller; 23, 24, 25. Servo controller; 3. Tensioning and clamping assembly; 31. Guide feeding roller; 32. Tensioning roller; 33. Clamping mechanism; 331. Drive shaft; 332. Transmission clamping wheel; 333. Fixing plate; 334. Adjusting plate; 335. Clutch; 4. Conveying assembly; 41. Conveying motor; 42. Driven wheel shaft; 43. Driven wheel shaft; 44. Conveying chain; 441. Positioning pin tooth; 45. Transition tensioning wheel; 46. Film support plate; 47. Support connecting frame; 48. Film pressure roller; 5. Pre-punching assembly; 51. Punching pressure roller; 511. Relief ring groove; 52. Punching roller; 52. Punching needle. 1; Bearing fixing plate 53; Adjustment mounting hole 531; Connecting gear 54; Film lifting structure 55; Film lifting sheet 551; Seedling tray forming assembly 6; Forming motor 61; Adjusting seat 62; Forming convex roller 63; Forming concave roller 64; Forming roller gear 65; Film cutting device 7; Film cutting drive motor 71; Film cutting drive pulley 72; Film cutting driven pulley 73; Transmission belt 74; Sliding guide rod 75; Cutting blade assembly 76; Slide rail seat 77; Pulley adjusting seat 78; Film heating device 8; Heater 80; Heating cover 82; Heating adjustment structure 81; Electric ball valve 810; Temperature measuring resistor 811; Temperature controller 812; Flow meter 813; Seedling tray cooling device 9. Detailed Implementation

[0024] To enhance understanding of the present invention, the invention will be further described in detail below with reference to the accompanying drawings. This embodiment is only used to explain the invention and does not constitute a limitation on the scope of protection of the invention.

[0025] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", 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 combination 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 limiting this invention.

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Figure 1-11 The image shows a novel rice seedling tray forming device, including... The bracket 1 is a symmetrical frame structure with two side walls. Multiple supporting connecting columns are provided between the two side walls to ensure its strength. An electrical control box 2 is fixed on the outer side of one side wall. The film roll 10 is horizontally mounted on the bottom two side walls of one end of the support 1. Limiting brackets are symmetrically set at the bottom of the two side walls to facilitate the installation and feeding of the film roll 10. The tensioning and clamping assembly 3 is set on the support 1 above the film roll 10 to tension and clamp the opened film and transport it backward. It also has the function of leveling and correcting deviation, ensuring that the film does not wrinkle or shift during high-speed continuous transport, providing a reliable guarantee for subsequent continuous production. The conveying component 4 is located behind the tensioning and clamping component 3. A conveying motor 41 is mounted on one side of the support of the conveying component 4 to drive the film backward. The other side is connected to the tensioning and clamping component 3 via a transmission chain, providing a synchronous power source for the tensioning and clamping component 3. This ensures uniform film tension and effectively prevents uneven film stretching, deviation, and poor synchronization. Under normal operating conditions, this power source is in a synchronous connection. If subsequent actions malfunction, the connection to the tensioning and clamping component 3 can be severed, causing the tensioning and clamping component 3 to only clamp the film without conveying it. This avoids the production of more defective products and reduces waste. Pre-stamping hole assembly 5 pre-stamps the bottom hole of the film on the conveying assembly 4; The seedling tray forming component 6 is located behind the pre-punching hole component 5. It presses and forms the film of the pre-punching bottom hole. The seedling tray forming component 6 is equipped with a matching forming motor 61 on one side. The other side of the seedling tray forming component 6 is connected to the pre-punching hole component 5 through a transmission chain to provide synchronous power source for the pre-punching hole component 5. This allows the forming and punching to be completed simultaneously, with a compact process connection. There is no need for secondary transfer of semi-finished products, which greatly improves the automation level and production efficiency of the production line. The film cutting device 7 is located at the film output point behind the tensioning and clamping assembly 3. It is configured to cut and separate the film in case of film conveying or forming failure, ensuring that subsequent film is no longer conveyed. It is also combined with the power control of the conveying assembly 4 to the tensioning and clamping assembly 3. This dual cutting guarantee mechanism can effectively control the production of subsequent defective products and improve the product qualification rate.

[0028] This application achieves constant tension, flattening, clamping, and conveying of the film by sequentially setting a controllable tensioning and clamping assembly 3 and a conveying assembly 4 on the frame 1. An independently controlled film cutting device 7 is installed on the conveying assembly 4 at the rear end of the tensioning and clamping assembly 3 to handle faulty wire breakage. The pre-punching hole assembly 5 and the seedling tray forming assembly 6 are driven by segmented independent servo drives, replacing the traditional single-machine linkage and hydraulic drive method. The movement sequence of each process is independently controllable and precisely coordinated. It effectively solves the problems of film stretching, deviation, and poor synchronization caused by the single power transmission of traditional equipment, so that the film conveying tension is uniform and the seedling tray forming speed, accuracy, pass rate, production stability, adaptability range and automation level are significantly improved.

[0029] Specifically: such as Figure 3-5As shown: The tensioning and clamping assembly 3 includes: a guide feeding roller 31 mounted on the support 1 above the front of the film roll 10, a tensioning roller 32 arranged parallel to the guide feeding roller 31, and a clamping mechanism 33 arranged behind the tensioning roller 32; the clamping mechanism 33 consists of a drive shaft 331, fixed plates 333 arranged on both sides of the drive shaft 331, and transmission clamping wheel sets 332 correspondingly arranged inside the two fixed plates 333. The transmission clamping wheel sets 332 are composed of two sets of parallel pressure rollers, which are mutually driven by gears. The transmission clamping wheel sets 332 roll and transport the opened film clamp forward to the conveying assembly 4, and at the same time have the function of leveling and correcting deviation, ensuring that the film does not wrinkle during high-speed continuous conveying. The system ensures that the equipment does not deviate, providing a reliable guarantee for the continuous production of qualified seedling trays. The two fixed plates 333 are fixedly connected to the two side walls of the support 1, and one side of the fixed plate 333 is fitted with an adjusting plate 334 for adjusting the clamping gap of the transmission clamping wheel group 332. The drive shaft 331 is rotatably mounted on the two side walls of the support 1, and one side is equipped with a sprocket adapted to the transmission chain and connected to the conveying component 4. The inner side of the sprocket is equipped with a clutch 335 that is linked to the film cutting device 7. The clutch is used to cut off the power source and prevent rotation output. When the equipment malfunctions in making seedling trays, the film cutting device cuts off the film, and at this time the clutch cuts off the power source of the tensioning clamping component. In this way, the tensioning clamping component does not convey the film and only clamps the film.

[0030] Specifically: such as Figure 2-3 As shown, the conveying assembly 4 includes: a drive wheel shaft 42 mounted on both sides of the support 1, a driven wheel shaft 43 correspondingly mounted on the support behind the drive wheel shaft 42, and a conveying chain 44. One end of the drive wheel shaft 42 is adapted to and connected to the conveying motor 41, and the other end is connected to the drive shaft 331 via a transmission chain to achieve synchronous drive with the tensioning clamping assembly 3. Sprockets adapted to the conveying chain 44 are provided on both sides of the drive wheel shaft 42 and the driven wheel shaft 43. The conveying chains 44 on both sides are fitted onto the sprockets to achieve synchronous drive and conveying of materials. Multiple transition tensioning wheels 45 are also symmetrically provided on both sides of the drive wheel shaft 42 and the driven wheel shaft 43 to adjust the tension of the two conveying chains 44 and ensure smooth and reliable transmission. A film support plate 46 is also provided between the two conveying chains 44 to provide support and protection for the film conveying mechanism. The film support plate 46 extends from the clamping mechanism 33 at intervals to the input end of the seedling tray forming assembly 6. The film support plate 46 is fixedly connected to the support 1 via a support connecting frame 47. By setting up a controllable and interconnected tension clamping component 3 and a conveying component 4, the unfolded film roll can be clamped and guided throughout the entire process, ensuring that the film does not wrinkle or deviate during high-speed continuous conveying, thus ensuring continuous and stable processing for subsequent applications.

[0031] Preferred: such as Figure 3 , 7As shown, multiple positioning pins 441 are evenly spaced on the conveyor chain 44 to drive the two sides of the film to move forward synchronously. On the support above the drive wheel shaft 42 and behind the conveyor end of the conveyor chain 44, film pressure rollers 48 are also symmetrically provided. A chain protection guide rail is provided on the outside of the conveyor chain 44. The protection guide rail is fixed to both sides of the film support plate 46 by a buckle.

[0032] Specifically: such as Figure 6 As shown, the pre-punching assembly 5 includes: a punching pressure roller 51 and a punching roller 52 arranged parallel to each other. The punching pressure roller 51 and the punching roller 52 are connected to the bracket on both sides through bearing fixing plates 53. Multiple punching needles 521 are evenly distributed on the roller surface of the punching roller 52. One end of the punching roller 52 is provided with a punching connecting sprocket 54 adapted to the transmission chain and connected to the seedling tray forming assembly 6. The other end of the punching roller 52 is connected to the punching pressure roller 51 through gear meshing. The roller surface of the punching pressure roller 51 is provided with a relief ring groove 511 adapted to the punching needles 521. The seedling tray forming assembly 6 drives the punching connecting sprocket 54 to drive the punching roller 52 to rotate. The punching pressure roller 51 presses on the punching roller 52, and the seedling tray film entering between the two rollers will be punched. The punched film will be carried away by the conveyor chain. The bearing fixing plate 53 is also provided with oblong adjustment mounting holes 531 symmetrically arranged on the upper and lower sides to adjust the installation position of the pre-punching assembly 5 relative to the bracket to ensure the quality of the punching hole.

[0033] Specifically: such as Figure 1 , 3 4.9 The seedling tray forming assembly 6 also includes: a forming convex roller 63 and a forming concave roller 64 mounted parallel to each other on the support 1. The forming convex roller 63 and the forming concave roller 64 are tunably connected to the support 1 on both sides via adjusting seats 62. One end of the forming convex roller 63 and the forming concave roller 64 is provided with a corresponding meshing forming roller gear 65. The other end of the forming convex roller 63 is adapted to and driven by the forming motor 61. The perforated film is conveyed by the conveying chain 44 to be rolled and formed between the forming convex roller 63 and the forming concave roller 64. The convex and concave dies on the forming convex roller 63 and the forming concave roller 64 are correspondingly partitioned with the perforation needles 521. A transmission sprocket adapted to the perforation connection sprocket 54 can be set on one side of the forming convex roller 63 or the forming concave roller 64 for power transmission, ensuring This verifies the synchronous consistency of the punching device 5 and the seedling tray forming component 6; the integrated synchronous punching and seedling tray forming structure allows for simultaneous forming and punching, with tight process connections, eliminating the need for secondary transfer of semi-finished products, significantly improving the automation level and production efficiency of the production line, and solving the drawbacks of traditional equipment such as dispersed processes, mismatched cycle times, and excessive manual assistance; the forming motor 61 drives the seedling tray forming convex roller 63, and the transmission gear installed on the seedling tray forming convex roller 63 drives the seedling tray forming concave roller 64 to rotate. The heated seedling tray film entering between the two rollers is rolled and formed, and then carried away by the conveyor chain. The seedling tray forming convex roller 63 and the seedling tray forming concave roller 64 are made of aluminum alloy to reduce weight, and the fit gap between the two rollers can be finely adjusted according to the thickness of the film.

[0034] Specifically: such as Figure 3 , 4 As shown in Figures 10-11, the film cutting device 7 includes: a film cutting drive motor 71 fixed to one side of the support 1 via a motor mounting bracket; a film cutting drive pulley 72 connected to the output end of the film cutting drive motor 71; a film cutting driven pulley 73 correspondingly arranged on the other side of the support 1; a transmission belt 74 sleeved on the film cutting drive pulley 72 and the film cutting driven pulley 73; and a cutter assembly 76 fixedly arranged at the lower part of the transmission belt 74 and reciprocating with the transmission belt 74. The film cutting driven pulley 73 is adjustablely connected to the support via a pulley adjustment seat 78. When a problem occurs in the seedling tray forming, the film cutting drive motor 71 is started, the film cutting drive pulley 72 rotates, driving the transmission belt 74 to move, and the cutter assembly 76 mounted on the transmission belt will reciprocate to cut and separate the film, effectively preventing the film from continuing to be transported and producing more defective products.

[0035] An alternative implementation, such as Figure 10-11 As shown: A guide sliding mechanism adapted to the cutter assembly 76 is also provided between the cutting drive pulley 72 and the cutting driven pulley 73. The guide sliding mechanism consists of a guide slide rod 75 and a slide rail seat 77. The guide slide rod 75 is suspended between the upper and lower transmission surfaces of the transmission belt 74 by a bracket. The cutter assembly 76 is slidably connected to the sliding guide rod 75 through the slide rail seat 77. The transmission belt 74 is fixedly connected to the cutter assembly 76 through the slide rail seat 77.

[0036] An alternative implementation, such as Figure 7-8 As shown: A film-lifting structure 55 is also provided at the film output position on one side of the punching roller 52. One side of the film-lifting structure 55 abuts against the film support plate 46, and the other side is provided with multiple film-lifting sheets 551 that fit and adhere to the arc surface of one side of the punching roller 52, effectively preventing the film from sticking to the roller after punching the bottom hole.

[0037] An optional implementation further includes a film heating device 8 and a seedling tray cooling device 9. The film heating device 8 is positioned between the pre-punching assembly 5 and the seedling tray forming assembly 6. After punching, the film is softened by heating in the heating area. The film heating structure allows for independent adjustment of the heating temperature according to the film thickness and forming requirements, ensuring uniform heating and consistent softening of the film. This avoids defects such as uneven forming depth and localized tearing caused by localized overheating and hardening, ensuring that each set of seedling trays has a uniform forming shape and stable and controllable forming quality. The seedling tray cooling device 9 is positioned behind the seedling tray forming assembly 6 to cool and solidify the formed seedling tray structure, ensuring the production quality of the seedling tray. The film heating device 8, the seedling tray cooling device 9, the conveying motor 41, the forming motor 61, and the film cutting drive motor 71 are electrically connected to the electrical control box 2. The conveying motor 41, the forming motor 61, and the film cutting drive motor 71 are configured as servo drive motors. Equipped with a dedicated online forced cooling mechanism, the seedling trays can be quickly and immediately shaped after hot pressing, effectively suppressing problems such as rebound, collapse, and warping of the film seedling trays. The sizing effect is good and the forming stability is strong, completely improving the technical defects of traditional equipment that relies on natural cooling, has poor sizing, and has a high scrap rate.

[0038] Working principle: The rolled seedling tray film 10 is manually placed on the fixed support of the device. The film roll is opened and passed through the film guide feeding roller 31, tension roller 32 and film support plate 46, and fixed to the tension clamping assembly 3. The forming device is started. The tension clamping assembly 3 uses two sets of transmission clamping wheels 332 to clamp and roll the film forward to the conveying assembly 4. The film is pressed by the film pressure roller 48 and then conveyed to the film punching roller for punching. The punched film is sent to the film heating device 8 area by the conveying chain 44. After being heated, the film enters the seedling tray forming roller for pressing and shaping. The pressed seedling tray is finally cooled and shaped by the seedling tray cooling device 9, and then the conveying chain outputs the seedling tray.

[0039] An alternative implementation, such as Figure 12-13As shown: The electrical control box 2 includes a central controller 21 and a remote controller 22; the conveying motor 41, the forming motor 61, and the film cutting drive motor 71 are all servo drive motors, and are respectively equipped with servo controllers 23, 24, and 25; the central controller 21 calculates the actual operating speed of the conveying motor 41 and the forming motor 61 through a preset program based on the pulse quantity fed back by the two servo controllers 23 and 24. When the speeds of the two deviate, the central controller 21 automatically sends an adjustment signal to the corresponding servo controller 23 or 24 to change the output pulse quantity, so that the film conveying speed and the seedling tray forming speed are always synchronized, ensuring that the film does not undergo stretching deformation or wrinkle accumulation due to speed inconsistency during conveying and rolling forming. Among them, the servo controller 25, which is electrically connected to the film cutting drive motor 71, can be set up with the central controller 21 and the remote controller 22 for joint control to realize real-time cutting and film breakage handling of faults through the setting of an online detection alarm device; the fan motor of the cooling device 9 is electrically connected to the central controller 21 through a switch relay to realize automatic switching.

[0040] Simultaneously, the central controller 21 automatically adjusts the heating temperature of the film heating device 8 according to the operating speed of the conveying motor 41 and the forming motor 61, increasing the heating temperature when the film conveying and seedling tray forming speeds up and decreasing the heating temperature when the speeds slow down. The film heating device 8 includes a heating cover 82, a heater 80 disposed within the heating cover 82, and a heating adjustment structure 81. A temperature measuring resistor 811 is also provided within the heating cover 82, which converts the detected temperature signal into an electrical signal and transmits it to the temperature controller 812. The temperature controller 812 displays the temperature signal and outputs a current signal to the central controller 21 according to a preset target temperature value. The central controller 21 integrates the current operating speeds of the conveying motor 41 and the forming motor 61 with the current signal fed back by the temperature controller 812. The central controller 21 determines whether the current heating temperature meets the set temperature required for the current operating speed. When the operating speed of the conveyor motor 41 and the forming motor 61 increases, the central controller 21 automatically increases the opening of the electric ball valve 810 on the gas pipeline connected to the heating adjustment structure 81, increasing the gas flow and raising the heating temperature to compensate for insufficient heating caused by the shortened time the film spends in the heating zone. When the operating speed decreases, the central controller 21 automatically decreases the opening of the electric ball valve 810, reducing the gas flow and heating temperature to prevent the film from overheating and turning white due to the extended residence time in the heating zone. The flow meter 813 installed on the gas pipeline where the electric ball valve 810 is located feeds back the real-time gas flow to the central controller 21, forming a closed-loop regulation until the heating temperature reaches and is stably maintained at the set temperature that matches the current conveying and forming speed.

[0041] This embodiment establishes an automatic linkage between the film conveying speed, the seedling tray forming speed, and the heating temperature, and realizes servo synchronous control of the two drive components. It eliminates the need for operators to manually adjust the heating temperature or repeatedly check whether the drive speed is consistent based on experience, further improving the stability of the seedling tray forming quality and the degree of production automation. It is especially suitable for flexible production scenarios that require frequent switching of production speed and processing of seedling trays of different specifications.

[0042] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of the present invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A novel rice seedling tray forming device, characterized in that: include The bracket (1) has an electrical control box (2) on one side. A film roll (10) is placed at the bottom of one end of a support (1); The tensioning clamping assembly (3) is set on the bracket (1) above the film roll (10) to tension and clamp the opened film; The conveying assembly (4) is located behind the tensioning clamping assembly (3). A conveying motor (41) is provided on one side of the support of the conveying assembly (4) to drive the film to move backward and convey. The other side is connected to the tensioning clamping assembly (3) through a transmission chain. The pre-stamping hole assembly (5) pre-stamps the bottom hole of the film on the conveying assembly (4); The seedling tray forming component (6) is set on the rear side of the pre-punch hole component (5) to press and form the film of the pre-punch bottom hole. The seedling tray forming component (6) is provided with a suitable forming motor (61) on one side and the seedling tray forming component (6) is connected to the pre-punch hole component (5) through a transmission chain on the other side. The film cutting device (7) is located at the film output point behind the tension clamping assembly (3) and is configured to cut off the film conveying in case of film conveying or forming failure.

2. The rice seedling tray forming device according to claim 1, characterized in that: The tensioning clamping assembly (3) includes: a guide feeding roller (31) disposed on the support (1) above the front of the film roll (10), a tensioning roller (32) disposed parallel to the guide feeding roller (31), and a clamping mechanism (33) disposed on the rear side of the tensioning roller (32); the clamping mechanism (33) consists of a drive shaft (331), fixed plates (333) disposed on both sides of the drive shaft (331), and transmission clamping wheel sets (332) disposed on the inner sides of the two fixed plates (333), the transmission clamping wheel sets (332) consisting of two sets The pressure rollers are arranged in parallel and are driven by gears. The transmission clamping wheel group (332) moves the opened film clamping wheel forward to the conveying assembly (4). The two fixed plates (333) are fixedly connected to the bracket (1). One side of the fixed plate (333) is fitted with an adjusting plate (334) for adjusting the clamping gap of the transmission clamping wheel (332). One side of the drive shaft (331) is fitted with a sprocket adapted to the transmission chain. The inner side of the sprocket is fitted with a clutch (335) that is linked with the film cutting device (7).

3. The rice seedling tray forming device according to claim 1, characterized in that: The conveying assembly (4) includes: a drive shaft (42) mounted on a bracket (1), a driven shaft (43) correspondingly mounted on the bracket behind the drive shaft (42), and a conveying chain (44). One end of the drive shaft (42) is adapted to and connected to a conveying motor (41), and the other end is connected to a drive shaft (331) via a transmission chain. Sprockets adapted to the conveying chain (44) are provided on both sides of the drive shaft (42) and the driven shaft (43). Multiple transition wheels are symmetrically arranged below the drive shaft (42) and the driven shaft (43). Tensioning wheel (45), and a film support plate (46) is provided between the two conveying chains (44). The film support plate (46) extends from the clamping mechanism (33) to the input end of the seedling tray forming component (6). The film support plate (46) is fixedly connected to the bracket (1) through the support connecting frame (47). Multiple positioning pins (441) are provided at equal intervals on the conveying chain (44) to drive the two sides of the film to move forward synchronously. A film pressure roller (48) is also symmetrically provided above the drive wheel shaft (42) and behind the conveying end of the conveying chain (44).

4. The rice seedling tray forming device according to claim 1, characterized in that: The pre-punching assembly (5) includes: a punching pressure roller (51) and a punching roller (52) arranged parallel to each other. The punching pressure roller (51) and the punching roller (52) are connected to the bracket on both sides through bearing fixing plates (53). The surface of the punching roller (52) is evenly distributed with multiple punching needles (521). One end of the punching roller (52) is provided with a punching connecting sprocket (54) adapted to the transmission chain and is connected to the seedling tray forming assembly (6). The other end of the punching roller (52) is connected to the punching pressure roller (51). Through gear meshing transmission, the punching roller (51) is provided with a relief ring groove (511) adapted to the punching needle (521) on the roller surface. The bearing fixing plate (53) is also provided with an elongated oval adjustment mounting hole (531) symmetrically on the top and bottom. The film output position on one side of the punching roller (52) is also provided with a film lifting structure (55). One side of the film lifting structure (55) abuts against the film support plate (46), and the other side is provided with a plurality of film lifting pieces (551) that fit and adhere to the arc surface on one side of the punching roller (52).

5. The rice seedling tray forming device according to claim 1, characterized in that: The seedling tray forming assembly (6) further includes: a forming convex roller (63) and a forming concave roller (64) that are mounted parallel to each other on the support (1). The two sides of the forming convex roller (63) and the forming concave roller (64) are tunably connected to the support (1) through adjusting seats (62). One end of the forming convex roller (63) and the forming concave roller (64) is provided with a forming roller gear (65) that meshes with each other. The other end of the forming convex roller (63) is adapted to and driven by a forming motor (61). The perforated film is conveyed by a conveying chain (44) to be rolled and formed between the forming convex roller (63) and the forming concave roller (64).

6. The rice seedling tray forming device according to claim 1, characterized in that: The film cutting device (7) includes: a film cutting drive motor (71) fixed on one side of the support (1), a film cutting drive pulley (72) connected to the output end of the film cutting drive motor (71), a film cutting driven pulley (73) correspondingly arranged on the other side of the support (1), a transmission belt (74) sleeved on the film cutting drive pulley (72) and the film cutting driven pulley (73), and a cutting blade assembly (76) fixedly arranged at the lower part of the transmission belt (74) and reciprocating with the transmission belt (74); the film cutting driven pulley (73) is connected to the support through a pulley adjusting seat (78); the film cutting drive pulley (73) is fixed ... drive pulley (72) and the film cutting driven pulley (73) is fixedly arranged on the other side of the support (1), a transmission belt (74) sleeved on the drive pulley (72) and the film cutting driven pulley (73) is fixedly arranged on the other side of the support (1), a transmission belt (74) sleeved on the drive pulley (72) and the film cutting driven pulley (73) sleeved on the other side of the support (1), a transmission belt (74) sleeved on the drive pulley (72) and the film cutting driven pulley (73) sleeved on the other side of the support (1), a transmission belt (74) sleeved on the other side of the support (1), a cutting belt (74) sleeved on the other side of A guide sliding mechanism adapted to the cutter assembly (76) is also provided between the wheel (72) and the driven pulley (73) for cutting the film. The guide sliding mechanism consists of a guide slide rod (75) and a slide rail seat (77). The guide slide rod (75) is suspended between the upper and lower transmission surfaces of the transmission belt (74) by a bracket. The cutter assembly (76) is slidably connected to the sliding guide rod (75) through the slide rail seat (77). The transmission belt (74) is fixedly connected to the cutter assembly (76) through the slide rail seat (77). The sliding guide rod (75) is mounted parallel between the upper and lower belt surfaces of the transmission belt (74).

7. The rice seedling tray forming device according to any one of claims 1-6, characterized in that: It also includes a film heating device (8) and a seedling tray cooling device (9). The film heating device (8) is set between the pre-punching assembly (5) and the seedling tray forming assembly (6) to heat and soften the film after punching. The seedling tray cooling device (9) is set on the rear side of the seedling tray forming assembly (6) to cool and shape the formed seedling tray structure. The film heating device (8), the seedling tray cooling device (9), the conveying motor (41), the forming motor (61), the film cutting drive motor (71) are electrically connected to the electrical control box (2).

8. The rice seedling tray forming device according to claim 7, characterized in that: The electrical control box (2) includes a central controller (21) and a remote controller (22); the central controller (21) automatically adjusts the heating temperature of the film heating device (8) according to the running speed of the conveying motor (41) and the forming motor (61), so that the heating temperature is increased when the film conveying and seedling tray forming speed is increased and decreased when the speed is decreased.

9. The rice seedling tray forming device according to claim 8, characterized in that: The conveying motor (41), forming motor (61) and film cutting drive motor (71) are all servo drive motors and are respectively equipped with servo controllers (23, 24, 25); the central controller (21) calculates the difference in actual running speed between the conveying motor (41) and the forming motor (61) based on the pulse quantity fed back by the two servo controllers (23, 24), and adjusts the amount of drive pulses sent to the two servo controllers (23, 24) so ​​that the film conveying speed and the seedling tray forming speed are kept synchronized.

10. The rice seedling tray forming device according to claim 7, characterized in that: The thin-film heating device (8) includes: a heating cover (82), a heater (80) disposed inside the heating cover (82), and a heating adjustment structure (81). An electric ball valve (810) is provided on the gas pipeline connected to the heating adjustment structure (81). A temperature measuring resistor (811) is also provided inside the heating cover (82). The temperature measuring resistor (811) is electrically connected to a temperature controller (812). The temperature controller (812) outputs a current signal to the central controller (21) based on the temperature signal fed back by the temperature measuring resistor (811). The central controller (21) controls the opening size of the electric ball valve (810) according to the current signal to adjust the gas flow rate. A flow meter (813) is also provided on the gas pipeline where the electric ball valve (810) is located. The flow meter (813) feeds back the actual gas flow signal to the central controller (21) until the heating temperature reaches and is maintained at the set temperature.

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