Automatic film ironing and winding machine and method for bare seedling belt for mechanical transplanting

Abstract

The invention discloses an automatic hot film rolling machine and method for a bare seedling belt for mechanical transplanting. The rolling machine comprises a rack, and the rack is provided with a bare seedling conveying device, a seedling belt releasing and collecting device, a hot sealing mechanism and a control system; the seedling strip releasing and collecting device comprises a lower film releasing assembly, a fixed-length film releasing assembly, an upper film releasing assembly, a flexible pressing wheel assembly, a film pressing assembly and a rolling assembly; the bare seedling conveying device comprises a conveying belt and a plurality of positioning mechanisms which are arranged on the conveying belt at equal intervals and are used for positioning bare seedlings; the heat sealing mechanism is located between the flexible pressing wheel assembly and the film pressing assembly. The hot sealing mechanism comprises a lifting seat and two rows of ironing columns which are installed on the lifting seat and arranged in a trumpet shape, and a partition plate with a trumpet-shaped opening groove in the lower portion is installed between the two rows of ironing columns. According to the invention, the production efficiency and the product quality are improved, and the stability and the accuracy of bare seedlings in the heat sealing process are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of production of bare seedling belts for transplanting machines, and in particular to an automatic hot film rolling machine and method for bare seedling belts for mechanized transplanting. Background Art

[0002] In modern agricultural production, the use of seedling belt transplanting technology to transplant bare seedlings has many advantages and has been widely used in the planting of sweet potatoes, Chinese medicinal materials, rice seedlings, rapeseed seedlings and other crops, wherein bare seedlings refer to seedlings that are not wrapped with a substrate or soil during transplantation. Taking sweet potatoes as an example, the applicant's prior application CN118451865A etc. shows a machine for transplanting bare sweet potato seedlings using sweet potato seedling belts, the sweet potato seedling belts include two films and sweet potato seedlings equidistantly clamped between the two clamping films, when in use, the two films are peeled off to make the sweet potato seedlings fall off.

[0003] In the prior art, the application number CN 118953794 A provides an automatic separation, packaging and winding machine for rhizome Chinese medicinal seedlings and its operation method. The patent integrates separation, transportation, identification, packaging and winding, and can achieve single separation of rhizome Chinese medicinal seedlings piled into bundles, and complete the automatic packaging and winding operation of rhizome Chinese medicinal seedlings. The patented technology is used for the production of seedlings with leaves such as sweet potato seedlings. There are the following problems:

[0004] (1) In this patent, two parallel hot-melt encapsulation strips are formed between the upper and lower films on both sides of the seedlings by using hot-melt ceramic sheets, which is not conducive to the peeling of the upper and lower films in subsequent use. In addition, the fixation effect is poor for bare seedlings with many leaves such as sweet potato seedlings, and the bare seedlings are easy to shift. During the peeling process, the upper and lower films are easy to break, resulting in transplanting interruption;

[0005] (2) In this patent, although the positioning device on the conveyor belt is suitable for Chinese medicinal material seedlings with relatively regular shapes, its positioning effect is insufficient for seedlings with multiple leaves and irregular shapes such as sweet potato seedlings. At the same time, when the ceramic hot melt sheet is packaged, it is easy to cause damage to the conveyor belt, and the firmness of the seal is difficult to be effectively guaranteed.

[0006] (3) High risk of film damage: During the production of sweet potato seedling strips, improper film tension control can easily cause damage or breakage of the upper and lower films, affecting subsequent transplanting operations. In particular, the upper film, which first contacts the hot-melt ceramic sheet, will break under tension if there is a gap between the upper and lower films when the hot-melt ceramic sheet contacts the upper film. Summary of the invention

[0007] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides an automatic film-scalding and winding machine and method for bare seedling strips for mechanized transplanting, which can realize automatic and stable production of bare seedling strips, ensure production quality and facilitate use in subsequent transplanting operations.

[0008] Technical solution: To achieve the above-mentioned purpose, the present invention provides a mechanized transplanting bare seedling belt automatic hot film winding machine, which includes a frame, and the frame is provided with a bare seedling conveying device, a seedling belt releasing and receiving device, a hot sealing mechanism and a control system;

[0009] The seedling tape releasing and retracting device comprises a lower film releasing assembly, a fixed-length film releasing assembly, an upper film releasing assembly, a flexible pressing wheel assembly, a film pressing assembly and a reeling assembly which are arranged on the frame in sequence from front to back;

[0010] The bare seedling conveying device comprises a conveyor belt and a plurality of positioning mechanisms for positioning the bare seedlings which are equidistantly installed on the conveyor belt;

[0011] The hot-sealing mechanism is located between the flexible pressing wheel assembly and the film pressing assembly; the hot-sealing mechanism includes a lifting seat, and two rows of hot-sealing posts arranged in a trumpet shape installed on the lifting seat, and a partition with a trumpet-shaped open groove at the bottom is installed between the two rows of hot-sealing posts; the hot-sealing mechanism also includes a lifting drive unit for driving the lifting seat to lift, and the lifting drive unit can be an electric cylinder; an induction sensor is arranged on the frame at a position corresponding to the bottom of the hot-sealing mechanism; the control system determines whether a positioning mechanism has reached the bottom of the hot-sealing mechanism according to the data detected by the induction sensor;

[0012] The positioning mechanism includes an upper positioning block and a lower positioning block. The two positioning blocks have a head positioning groove and a tail positioning groove respectively. The head positioning groove and the tail positioning groove are both structures of an upper V-shaped groove and a lower groove, and the mouth width and square groove width of the head positioning groove are both greater than the mouth width and square groove width of the tail positioning groove. This conforms to the characteristics of more branches and leaves at the head of the naked seedlings and fewer branches and leaves at the tail, and can effectively position the naked seedlings. During operation, the lower film released by the lower film release assembly is placed between the upper positioning block and the lower positioning block. Below the hot sealing mechanism, the upper film, naked seedlings, and lower film are stacked in sequence, and the flexible pressing wheel assembly presses the laid lower film, naked seedlings, and upper film so that they can enter the hot sealing device smoothly. After the lifting seat descends, the partition will buckle the bare seedlings with vines inside to prevent scalding and displacement of the bare seedlings. The two rows of scalding columns form two rows of trumpet-shaped scalding points between the upper and lower films. At each scalding point, the upper and lower films are melted and adhered together to fix the bare seedlings between the upper and lower films, and facilitate the later peeling of the upper and lower films to release the bare seedlings for transplanting operations. After the peeling of the upper and lower films, the damage to each film is small and the film will not break, which will not affect the continuity of the transplanting operation.

[0013] The above structure realizes the automation of bare seedling belt production by integrating bare seedling conveying device, seedling belt releasing and collecting device, hot sealing mechanism and control system. This design not only improves production efficiency and product quality, but also ensures the stability and accuracy of bare seedlings during hot sealing. In particular, the design of two rows of hot columns arranged in a trumpet shape and the partition effectively prevent the displacement and scalding of bare seedlings, ensure the firm adhesion between the upper and lower films, facilitate the later peeling and reduce the damage of the film, and ensure the continuity of the transplanting operation.

[0014] Furthermore, the lower film release assembly includes a first stand, a first shaft, an electromagnetic damper and a first tension adjustment mechanism; the electromagnetic damper applies a damping torque to the first shaft. The first tension adjustment mechanism includes a first redirecting wheel rotatably mounted on the first stand, and also includes a first connecting rod rotatably mounted relative to the first stand, a first movable wheel is mounted at the end of the first connecting rod, and a first tension spring is connected between the first connecting rod and the first stand; the lower film roll is fixed relative to the first shaft, and the lower film released by the lower film roll passes through the first redirecting wheel and the first movable wheel in turn and then passes through the fixed-length film release assembly, and the lower film between the lower film roll and the fixed-length film release assembly is S-shaped.

[0015] The fixed-length film unwinding component comprises two clamping wheels and a film unwinding motor driving one of the clamping wheels to operate.

[0016] The lower film release assembly includes an electromagnetic damper and a tension adjustment mechanism to ensure that the lower film maintains appropriate tension during the release process to avoid loosening or breaking. The electromagnetic damper applies a damping torque to the first axis, combined with the first tension adjustment mechanism, so that the lower film can be released smoothly and the fixed-length film release assembly can accurately supply the lower film.

[0017] Preferably, the first tensioning adjustment mechanism further includes an angular displacement sensor for monitoring the relative angle between the first connecting rod and the first stand. When the angular displacement exceeds a preset threshold range, the control system adjusts the damping torque of the electromagnetic damper according to the sensor feedback to maintain the appropriate tension of the lower membrane. Specifically, when the angular displacement exceeds the maximum threshold, the control system reduces the operating current of the electromagnetic damper and reduces the damping force; when the angular displacement is lower than the minimum threshold, the control system increases the operating current of the electromagnetic damper and increases the damping force.

[0018] Furthermore, the upper film release assembly includes a second stand, a second shaft, a damping device and a second tension adjustment mechanism; the damping device applies a damping torque to the second shaft. The second tension adjustment mechanism includes a second redirecting wheel rotatably mounted on the second stand, and also includes a second connecting rod rotatably mounted relative to the second stand, a second movable wheel is mounted at the end of the second connecting rod, and a second tension spring is connected between the second connecting rod and the second stand; the upper film roll is fixed relative to the second shaft, and the upper film released by the upper film roll passes through the second redirecting wheel and the second movable wheel in turn and then passes through the flexible pressing wheel assembly. The upper film portion between the upper film roll and the flexible pressing wheel assembly is S-shaped.

[0019] The upper film release assembly adopts a similar structural design to the lower film release assembly to ensure that the upper film maintains appropriate tension and stability during the release process. The damping device applies a damping torque to the second axis, combined with the second tension adjustment mechanism, so that the upper film can cover the bare seedlings smoothly and accurately.

[0020] Furthermore, the partition and the lifting seat in the hot sealing mechanism are connected by a plurality of screws, and a compression spring is arranged between the partition and the lifting seat, and the compression spring is sleeved on the screws so that the partition can float up and down elastically relative to the screws. In addition, a heat-conducting column for transferring heat to each hot post is installed on the lifting seat. This connection structure ensures that the lower edge of the partition can contact the upper and lower films before the hot post, and pre-press them together. This design not only provides the necessary buffer so that the partition can adapt to bare seedlings of different heights, but also ensures that the upper and lower films have been firmly pressed together before the hot post acts, so as to facilitate the hot post to form a precise hot point, thereby improving the hot sealing effect and the quality of the finished product. In addition, the design of the compression spring allows the partition to float up and down, further enhancing the adaptability of the equipment to bare seedlings of different sizes and ensuring the stability and reliability of the operation.

[0021] Furthermore, the positioning mechanism also includes a stop plate and a flexible pad, the stop plate connects the upper positioning block and the lower positioning block, and is fixed to the conveyor belt by screws to prevent the positioning block from rotating after long-term work and affecting the seedling clamping effect; the two flexible pads are placed on both sides of the stop plate and are hot-melt fixed to the conveyor belt to prevent the hot stamping unit from damaging the conveyor belt during the hot stamping process and ensure that the ends of all hot stamping units can evenly press against the lower film to form a firm hot spot.

[0022] Furthermore, the winding assembly includes three direction-changing wheels arranged in a triangle, a winding wheel, and a winding motor driving the winding wheel. The direction-changing wheel not only adjusts the path of the film so that the film between the film pressing assembly and the winding wheel has an S-shaped direction, but also helps maintain the tension of the film to prevent wrinkles and relaxation. The winding motor accurately controls the running speed of the winding wheel, ensures the neat winding of the bare seedling tape, and improves the appearance quality and convenience of the finished product.

[0023] The method for automatically hot-filming and rolling bare seedling belts for mechanized transplanting is based on the above-mentioned automatic hot-filming and rolling bare seedling belts for mechanized transplanting, and comprises the following steps:

[0024] Step 1), the lower film releasing assembly releases the lower film, and the release length of the lower film is accurately controlled by the fixed-length film releasing assembly;

[0025] The lower film passes through the first redirecting wheel and the first movable wheel in sequence, and is laid between the upper positioning block and the lower positioning block of each positioning mechanism.

[0026] Step 2), manually or mechanically placing the naked seedlings on the lower film, and placing the head and tail of the naked seedlings in the corresponding positioning grooves of the upper positioning block and the lower positioning block respectively;

[0027] Step 3), the upper film released by the upper film release assembly covers the bare seedlings; the flexible pressing wheel assembly preliminarily presses the upper and lower films together with the bare seedlings to ensure that the films are tightly fitted to the bare seedlings;

[0028] Step 4), when the induction sensor detects that the positioning mechanism reaches below the hot-sealing mechanism, the control system starts the hot-sealing program;

[0029] The specific hot sealing procedure is as follows: the conveyor belt and the fixed-length film placing assembly stop running, the lifting drive unit drives the lifting seat to descend, the partition plate contacts the upper and lower films before the hot poles, pre-presses them, and at the same time the partition plate covers the seedling vines of the bare seedlings to prevent scalding and displacement, and then two rows of hot poles arranged in a trumpet shape press the upper and lower films against the flexible pad to form a firm hot spot;

[0030] Step 5), after the hot sealing is completed, the lifting seat rises and resets, and the formed bare seedling belt continues to move forward and is wound up by the winding assembly. Specifically, the direction-changing wheel in the winding assembly guides the bare seedling belt after hot sealing into the winding wheel, and the winding motor drives the winding wheel to neatly wind up the bare seedling belt; the control system adjusts the speed of the winding motor as needed to maintain appropriate tension and ensure winding quality.

[0031] Then, the conveyor belt and the fixed-length film-releasing assembly continue to operate until the next positioning mechanism reaches under the hot-sealing mechanism, causing the sensor to generate a detection signal. This cycle can be used to achieve continuous hot-sealing operations and continuous production of bare seedling belts.

[0032] The above method realizes the full automation of bare seedling strip production through a series of coordinated steps. From the laying of the lower film, the placement of bare seedlings, the covering of the upper film, the hot sealing process to the final rolling of the finished product, each step has been carefully designed to ensure the accuracy and consistency of the operation. In particular, through the cooperation of the induction sensor and the control system, the precise control of the hot sealing timing is achieved, ensuring that each bare seedling can be effectively encapsulated. This method not only improves production efficiency, but also reduces the influence of human factors, improves the quality and stability of the product, and is suitable for large-scale continuous production environments.

[0033] Beneficial effects: The automatic film-scalding and winding machine and method for bare seedling strips for mechanized transplanting of the present invention have the following beneficial effects:

[0034] (1) The automatic film-scalding and film-winding machine for bare seedling tapes for mechanized transplanting realizes the automation of bare seedling tape production by integrating bare seedling conveying devices, seedling tape releasing and retracting devices, hot-sealing mechanisms and control systems. This design not only improves production efficiency and product quality, but also ensures the stability and accuracy of bare seedlings during the hot-sealing process. In particular, the design of two rows of hot-sealing columns arranged in a trumpet shape and the partition effectively prevents the displacement and scalding of bare seedlings, ensures the firm adhesion between the upper and lower films, facilitates the later peeling and reduces film damage, and ensures the continuity of transplanting operations.

[0035] (2) The automatic film hot stamping and rolling method for bare seedling tapes for mechanized transplanting realizes the full automation of bare seedling tape production through a series of coordinated steps. From the laying of the lower film, the placement of bare seedlings, the covering of the upper film, the hot stamping and sealing process to the final rolling of the finished product, each step has been carefully designed to ensure the accuracy and consistency of the operation. In particular, through the cooperation of the induction sensor and the control system, the precise control of the hot stamping and sealing timing is achieved, ensuring that each bare seedling can be effectively encapsulated. This method not only improves production efficiency, but also reduces the influence of human factors, improves the quality and stability of the product, and is suitable for large-scale continuous production environments.

[0036] (3) The technology of the present invention is suitable for hot sealing and rolling operations on bare seedlings of crops such as sweet potatoes, Chinese medicinal materials, rice seedlings, and rapeseed seedlings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a side view of the structure of the automatic film-scalding and winding machine for bare seedlings used in mechanized transplanting;

[0038] Figure 2 This is a top view of the structure of the automatic film-scalding and winding machine for bare seedlings used in mechanized transplanting;

[0039] Figure 3 This is a structural diagram of the rear side of the rack;

[0040] Figure 4 It is a three-dimensional structural diagram of the hot sealing mechanism;

[0041] Figure 5 This is a front view structural diagram of the hot sealing mechanism;

[0042] Figure 6 It is the structural diagram of the positioning mechanism;

[0043] Figure 7 is a structural diagram of a first tensioning adjustment mechanism;

[0044] Figure 8 is a structural diagram of the second tensioning adjustment mechanism;

[0045] Fig. 9 This is the finished product structure diagram of the seedling tray rolled up with bare seedling tape.

[0046] In the figure: 1-frame; 2-scalding mechanism; 21-lifting seat; 22-scalding column; 23-lifting drive unit; 24-partition; 25-screw; 26-compression spring; 27-heat-conducting column; 3-lower film release assembly; 31-first shaft; 32-electromagnetic damper; 33-first tension adjustment mechanism; 33a-first redirecting wheel; 33b-first connecting rod; 33c-first movable wheel; 33d-first tension spring; 34-first stand; 4-fixed length film release assembly; 41-film release motor; 5-upper film release assembly; 51 -second shaft; 52-damping device; 53-second tensioning adjustment mechanism; 53a-second redirecting wheel; 53b-second connecting rod; 53c-second movable wheel; 53d-second tension spring; 54-second stand; 6-flexible pressing wheel assembly; 7-film pressing assembly; 8-winding assembly; 81-redirecting wheel; 82-winding wheel; 83-winding motor; 9-positioning mechanism; 91-upper positioning block; 91a-head positioning slot; 92-lower positioning block; 92a-tail positioning slot; 10-conveyor belt; 20-control system. DETAILED DESCRIPTION

[0047] The present invention will be further described below in conjunction with the accompanying drawings.

[0048] like Figure 1 and Figure 2 The mechanized bare seedling belt automatic film winding machine for transplanting shown includes a frame 1, on which a bare seedling conveying device, a seedling belt releasing and receiving device, a hot sealing mechanism 2 and a control system 20 are provided;

[0049] The seedling tape releasing and retracting device comprises a lower film releasing assembly 3, a fixed length film releasing assembly 4, an upper film releasing assembly 5, a flexible pressing wheel assembly 6, a film pressing assembly 7 and a reeling assembly 8 which are arranged in sequence from front to back on the frame 1;

[0050] The bare seedling conveying device comprises a conveyor belt 10 and a plurality of positioning mechanisms 9 equidistantly installed on the conveyor belt 10 for positioning the bare seedlings;

[0051] like Figure 3 As shown, the hot sealing mechanism 2 is located between the flexible pressing wheel assembly 6 and the film pressing assembly 7; Figure 4 and Figure 5 As shown, the hot-sealing mechanism 2 includes a lifting seat 21, and two rows of hot-sealing posts 22 arranged in a trumpet shape installed on the lifting seat 21, and a partition 24 with a trumpet-shaped open groove at the bottom is installed between the two rows of hot-sealing posts 22; the hot-sealing mechanism 2 also includes a lifting drive unit 23 for driving the lifting seat 21 to rise and fall, and the lifting drive unit 23 can be an electric cylinder; an induction sensor is arranged on the frame 1 at a position corresponding to the bottom of the hot-sealing mechanism 2; the control system determines whether the positioning mechanism 9 has reached the bottom of the hot-sealing mechanism 2 according to the data detected by the induction sensor;

[0052] like Figure 6 As shown, the positioning mechanism 9 includes an upper positioning block 91 and a lower positioning block 92, and the two positioning blocks have a head positioning groove 91a and a tail positioning groove 92a, respectively. The head positioning groove 91a and the tail positioning groove 92a are both structures of an upper V-shaped groove and a lower groove, and the mouth width and square groove width of the head positioning groove 91a are both greater than the mouth width and square groove width of the tail positioning groove 92a, which conforms to the characteristics of more branches and leaves at the head of the naked seedlings and fewer branches and leaves at the tail, and can effectively position the naked seedlings. During operation, the lower film released by the lower film release assembly 3 is placed between the upper positioning block 91 and the lower positioning block 92. Below the hot sealing mechanism 2, the upper film, naked seedlings, and lower film are stacked in sequence, and the flexible pressing wheel assembly 6 presses the laid lower film, naked seedlings, and upper film so that they can enter the hot sealing device smoothly. After the lifting seat 21 descends, the partition 24 will buckle the bare seedlings with the vine cover therein to prevent scalding and displacement of the bare seedlings. The two rows of scalding columns 22 form two rows of trumpet-shaped scalding points between the upper and lower films. At each scalding point, the upper and lower films are melted and adhered together to fix the bare seedlings between the upper and lower films, and facilitate the subsequent peeling of the upper and lower films to release the bare seedlings for transplanting operations. After the peeling of the upper and lower films, the damage to each film is small and the film will not break, which will not affect the continuity of the transplanting operation.

[0053] The above structure realizes the automation of bare seedling belt production by integrating bare seedling conveying device, seedling belt releasing and collecting device, hot sealing mechanism and control system. This design not only improves production efficiency and product quality, but also ensures the stability and accuracy of bare seedlings during hot sealing. In particular, the design of two rows of hot columns arranged in a trumpet shape and the partition effectively prevent the displacement and scalding of bare seedlings, ensure the firm adhesion between the upper and lower films, facilitate the later peeling and reduce the damage of the film, and ensure the continuity of the transplanting operation.

[0054] Preferably, if Figure 7As shown, the lower film release assembly 3 includes a first stand 34, a first shaft 31, an electromagnetic damper 32 and a first tension adjustment mechanism 33; the electromagnetic damper 32 applies a damping torque to the first shaft 31. The first tension adjustment mechanism 33 includes a first redirecting wheel 33a rotatably mounted on the first stand 34, and also includes a first connecting rod 33b rotatably mounted relative to the first stand 34, a first movable wheel 33c is mounted on the end of the first connecting rod 33b, and a first tension spring 33d is connected between the first connecting rod 33b and the first stand 34; the lower film roll is fixed relative to the first shaft 31, and the lower film released by the lower film roll passes through the first redirecting wheel 33a and the first movable wheel 33c in turn and then passes through the fixed-length film release assembly 4, and the lower film between the lower film roll and the fixed-length film release assembly 4 is S-shaped.

[0055] The fixed-length film unwinding assembly 4 comprises two clamping wheels and a film unwinding motor 41 for driving one of the clamping wheels to operate.

[0056] The lower film release assembly 3 includes an electromagnetic damper and a tension adjustment mechanism to ensure that the lower film maintains appropriate tension during the release process to avoid loosening or breaking. The electromagnetic damper 32 applies a damping torque to the first axis, combined with the first tension adjustment mechanism 33, so that the lower film can be released smoothly and the fixed-length film release assembly 4 can accurately supply the lower film.

[0057] Preferably, the first tension adjustment mechanism 33 further includes an angular displacement sensor for monitoring the relative angle between the first connecting rod 33b and the first stand 34. When the angular displacement exceeds the preset threshold range, the control system adjusts the damping torque of the electromagnetic damper 32 according to the sensor feedback to maintain the appropriate tension of the lower membrane. Specifically, when the angular displacement exceeds the maximum threshold, the control system reduces the operating current of the electromagnetic damper 32 to reduce the damping force; when the angular displacement is lower than the minimum threshold, the control system increases the operating current of the electromagnetic damper 32 to increase the damping force.

[0058] Preferably, if Figure 8 As shown, the upper film release assembly 5 includes a second stand 54, a second shaft 51, a damping device 52 and a second tension adjustment mechanism 53; the damping device 52 applies a damping torque to the second shaft 51. The second tension adjustment mechanism 53 includes a second redirecting wheel 53a rotatably mounted on the second stand 54, and also includes a second connecting rod 53b rotatably mounted relative to the second stand 54, a second movable wheel 53c is mounted on the end of the second connecting rod 53b, and a second tension spring 53d is connected between the second connecting rod 53b and the second stand 54; the upper film roll is fixed relative to the second shaft 51, and the upper film released by the upper film roll passes through the second redirecting wheel 53a and the second movable wheel 53c in turn and then passes through the flexible pressing wheel assembly 6. The upper film portion between the upper film roll and the flexible pressing wheel assembly 6 is S-shaped.

[0059] The upper film release assembly 5 adopts a similar structural design to the lower film release assembly 3 to ensure that the upper film maintains appropriate tension and stability during the release process. The damping device 52 applies a damping torque to the second shaft 51, combined with the second tension adjustment mechanism 53, so that the upper film can cover the bare seedlings smoothly and accurately.

[0060] Preferably, the partition 24 and the lifting seat 21 in the hot sealing mechanism 2 are connected by a plurality of screws 25, and a compression spring 26 is arranged between the partition 24 and the lifting seat 21, and the compression spring 26 is sleeved on the screws 25, so that the partition 24 can float up and down elastically relative to the screws 25. In addition, a heat-conducting column 27 for transferring heat to each hot post 22 is installed on the lifting seat 21. This connection structure ensures that the lower edge of the partition 24 can contact the upper and lower films before the hot post 22, and pre-press them together. This design not only provides the necessary buffer so that the partition 24 can adapt to bare seedlings of different heights, but also ensures that the upper and lower films have been firmly pressed together before the hot post 22 acts, so as to facilitate the hot post 22 to form a precise hot point, thereby improving the effect of hot sealing and the quality of the finished product. In addition, the design of the compression spring 26 allows the partition 24 to float up and down, further enhancing the adaptability of the equipment to bare seedlings of different sizes and ensuring the stability and reliability of operation.

[0061] Preferably, the positioning mechanism 9 also includes a stop plate 93 and a flexible pad 94, the stop plate 93 connects the upper positioning block 91 and the lower positioning block 92, and is fixed to the conveyor belt 10 by screws to prevent the positioning block from rotating after long-term work and affecting the seedling clamping effect; the two flexible pads 94 are placed on both sides of the stop plate 93 and are hot-melt fixed to the conveyor belt 10 to prevent the hot stamping unit 22 from damaging the conveyor belt 10 during the hot stamping process, and to ensure that the ends of all hot stamping units 22 can evenly press against the lower film to form a firm hot spot.

[0062] Preferably, if Figure 3As shown, the winding assembly 8 includes three diverting wheels 81 arranged in a triangular shape, a winding wheel 82, and a winding motor 83 driving the winding wheel 82. The diverting wheel 81 not only adjusts the path of the film so that the film between the film pressing assembly 7 and the winding wheel 82 is in an S-shaped direction, but also helps maintain the tension of the film and prevents wrinkles and relaxation. The winding motor 83 accurately controls the running speed of the winding wheel 82, ensures the neat winding of the bare seedling belt, and improves the appearance quality and convenience of the finished product. Preferably, one of the three diverting wheels 81 is slidably installed relative to the frame 1, and a spring and a displacement sensor are provided between the diverting wheel 81 and the frame 1. The displacement sensor monitors the position change of the diverting wheel 81 and feeds back the data to the control system. When the tension of the upper and lower films changes greatly during the winding process, if the displacement is greater than the preset maximum displacement threshold, the control system controls the winding motor 83 to reduce the speed; if the displacement is less than the preset minimum displacement threshold, the control system controls the winding motor 83 to increase the speed. The displacement sensor monitors the position change of the direction-changing wheel 81 in real time and feeds the data back to the control system, so that the control system can dynamically adjust the speed of the winding motor 83 according to the actual tension situation to ensure the stability of the winding process and the quality of the finished product.

[0063] The method for automatically hot-filming and rolling bare seedling belts for mechanized transplanting is based on the above-mentioned automatic hot-filming and rolling bare seedling belts for mechanized transplanting, and comprises the following steps:

[0064] Step 1), the lower film releasing component 3 releases the lower film, and the release length of the lower film is accurately controlled by the fixed-length film releasing component 4;

[0065] The lower film passes through the first redirecting wheel 33 a and the first movable wheel 33 c in sequence, and is laid between the upper positioning block 91 and the lower positioning block 92 of each positioning mechanism 9 .

[0066] Step 2), manually or mechanically placing the naked seedlings on the lower film, and placing the head and tail of the naked seedlings in the corresponding positioning grooves of the upper positioning block 91 and the lower positioning block 92 respectively;

[0067] Step 3), the upper film released by the upper film release component 5 covers the bare seedlings; the flexible pressing wheel component 6 preliminarily presses the upper and lower films together with the bare seedlings to ensure that the films are tightly fitted to the bare seedlings;

[0068] Step 4), when the induction sensor detects that the positioning mechanism 9 reaches below the hot-sealing mechanism 2, the control system starts the hot-sealing procedure;

[0069] The hot sealing procedure is as follows: the conveyor belt 10 and the fixed-length film placing assembly 4 are stopped, the lifting drive unit 23 drives the lifting seat 21 to descend, the partition 24 contacts the upper and lower films before the hot poles 22, and pre-presses them, and at the same time the partition 24 covers the seedlings of the bare seedlings to prevent scalding and displacement, and then the two rows of hot poles 22 arranged in a trumpet shape press the upper and lower films against the flexible pad 94 to form a firm hot spot;

[0070] Step 5), after the hot sealing is completed, the lifting seat 21 rises and resets, and the formed bare seedling belt continues to move forward and is wound up by the winding assembly 8. Specifically, the direction-changing wheel 81 in the winding assembly 8 guides the bare seedling belt after hot sealing into the winding wheel 82, and the winding motor 83 drives the winding wheel 82 to neatly wind up the bare seedling belt; the control system adjusts the speed of the winding motor 83 as needed to maintain appropriate tension and ensure winding quality. Fig. 9 shown.

[0071] Then, the conveyor belt 10 and the fixed-length film-releasing assembly 4 continue to operate until the next positioning mechanism 9 reaches under the hot-sealing mechanism 2, causing the sensor to generate a detection signal. By running in this cycle, continuous hot-sealing operations can be achieved, and continuous production of bare seedling belts can be carried out.

[0072] The above method realizes the full automation of bare seedling strip production through a series of coordinated steps. From the laying of the lower film, the placement of bare seedlings, the covering of the upper film, the hot sealing process to the final rolling of the finished product, each step has been carefully designed to ensure the accuracy and consistency of the operation. In particular, through the cooperation of the induction sensor and the control system, the precise control of the hot sealing timing is achieved, ensuring that each bare seedling can be effectively encapsulated. This method not only improves production efficiency, but also reduces the influence of human factors, improves the quality and stability of the product, and is suitable for large-scale continuous production environments.

[0073] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An automatic film hot stamping and winding machine for bare seedling tape for mechanized transplanting, comprising a frame (1), on which a bare seedling conveying device, a seedling tape releasing and receiving device, a hot stamping mechanism (2) and a control system (20) are provided; characterized in that: The seedling tape releasing and retracting device comprises a lower film releasing component (3), a fixed-length film releasing component (4), an upper film releasing component (5), a flexible pressing wheel component (6), a film pressing component (7) and a reeling component (8) which are sequentially arranged on the frame (1) from front to back; The bare seedling conveying device comprises a conveyor belt (10) and a plurality of positioning mechanisms (9) equidistantly installed on the conveyor belt (10) for positioning the bare seedlings; The hot sealing mechanism (2) is located between the flexible pressing wheel assembly (6) and the film pressing assembly (7); the hot sealing mechanism (2) comprises a lifting seat (21), and two rows of hot posts (22) arranged in a trumpet shape and mounted on the lifting seat (21), and a partition (24) having a trumpet-shaped open groove at the bottom is mounted between the two rows of hot posts (22); the hot sealing mechanism (2) also comprises a lifting drive unit (23) for driving the lifting seat (21) to rise and fall; an induction sensor is arranged on the frame (1) at a position corresponding to the bottom of the hot sealing mechanism (2); The positioning mechanism (9) comprises an upper positioning block (91) and a lower positioning block (92), and the two positioning blocks respectively have a head positioning groove (91a) and a tail positioning groove (92a).

2. The automatic film-scalding and winding machine for bare seedling strips for mechanized transplanting according to claim 1 is characterized in that: The lower film release assembly (3) comprises a first stand (34), a first shaft (31), an electromagnetic damper (32) and a first tension adjustment mechanism (33); the electromagnetic damper (32) applies a damping torque to the first shaft (31).

3. The automatic film-scalding and winding machine for bare seedling strips for mechanized transplanting according to claim 1 is characterized in that: The upper film release assembly (5) comprises a second stand (54), a second shaft (51), a damping device (52) and a second tension adjustment mechanism (53); the damping device (52) applies a damping torque to the second shaft (51).

4. The automatic film-scalding and winding machine for bare seedling strips for mechanized transplanting according to claim 1 is characterized in that: The partition plate (24) and the lifting seat (21) in the hot sealing mechanism (2) are connected via a plurality of screws (25), and a compression spring (26) is provided between the partition plate (24) and the lifting seat (21), so that the partition plate (24) can float elastically up and down relative to the screws (25).

5. The automatic film-scalding and winding machine for bare seedling strips for mechanized transplanting according to claim 1 is characterized in that: The positioning mechanism (9) also includes a stop plate (93) and a flexible pad (94); the stop plate (93) connects the upper positioning block (91) and the lower positioning block (92), and is fixed to the conveyor belt (10) by screws; the two flexible pads (94) are respectively arranged on both sides of the stop plate (93) and are fixed to the conveyor belt (10) by hot melt.

6. The automatic film-scalding and winding machine for bare seedling strips for mechanized transplanting according to claim 1 is characterized in that: The winding assembly (8) comprises three direction-changing wheels (81) arranged in a triangle, a winding wheel (82), and a winding motor (83) for driving the winding wheel (82) to operate.

7. A method for automatically hot-filming and rolling bare seedling strips for mechanized transplanting, which is based on the automatic hot-filming and rolling bare seedling strips for mechanized transplanting according to any one of claims 1 to 6, characterized in that: The steps include: Step 1), the lower film releasing component (3) releases the lower film, and the release length of the lower film is accurately controlled by the fixed-length film releasing component (4); Step 2), manually or mechanically placing the naked seedlings on the lower film, and placing the head and tail of the naked seedlings in the corresponding positioning grooves of the upper positioning block (91) and the lower positioning block (92) respectively; Step 3), the upper film released by the upper film releasing component (5) covers the naked seedlings; Step 4), when the induction sensor detects that the positioning mechanism (9) reaches below the hot-sealing mechanism (2), the control system starts the hot-sealing procedure; Step 5), after the hot sealing is completed, the lifting seat (21) rises and resets, and the formed bare seedling belt continues to move forward and is rolled up by the rolling assembly (8).

Images