A naked seedling tape film pasting mechanism and a film pasting method for mechanized transplanting

Abstract

The application discloses a naked seedling belt hot film mechanism and a hot film method for mechanized transplanting. The hot film mechanism comprises a hot knife mechanism and a naked seedling jig. The hot knife mechanism comprises a seat body and a hot film unit fixed on the seat body. The naked seedling jig has a backing plate matched with the hot film unit. The naked seedling jig further comprises an upper seedling clamp and a lower seedling clamp separately arranged at two ends of the backing plate. The hot knife mechanism further comprises a partition plate connected with the seat body and having a gap between the two. The partition plate has a downwardly open notch, and the notch is trumpet-shaped. The hot film unit is columnar, and the number of the hot film units is multiple. All the hot film units are divided into two groups and arranged on two sides of the partition plate, and each group of hot film units is arranged along a line parallel to the side edge of the notch. The mechanism and the method of the application fully adapt to the characteristics of hot sealing of naked seedlings. The formed hot spots not only can sufficiently constrain the naked seedlings, but also can separate the upper and lower films to release the naked seedlings in subsequent use.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bare seedling belt production for agricultural transplanting, and particularly relates to a bare seedling belt film-pressing mechanism and a film-pressing method for mechanized transplanting. BACKGROUND

[0002] In the field of agricultural cultivation, sweet potato, Chinese herbal medicine, rice, and oilseed rape can be planted by means of bare seedling transplanting. Bare seedling refers to seedling that is not wrapped with substrate or soil during transplanting, and the seedling has leaves. Taking sweet potato as an example, sweet potato seedling transplanting technology is a key link for improving the yield and quality of sweet potato. Traditional sweet potato seedling transplanting relies on manual work, which is low in efficiency and high in labor intensity. With the development of agricultural mechanization, automatic transplanting technology based on sweet potato seedling belt has emerged. For example, the technology disclosed in the prior applications CN118451865A and CN118370062A of the applicant, which forms a seedling belt by clamping sweet potato seedlings between an upper film and a lower film, and gradually peels off the upper film and the lower film to make the sweet potato seedlings separate from the upper film and the lower film and fall into a seedling groove, thereby realizing continuous transplanting of sweet potato seedlings. However, the technology for producing bare seedling belt is relatively high in requirement, mainly because the physical properties of bare seedlings make it difficult to produce bare seedling belt. In the prior art, patent CN118953794A discloses a hot-melt packaging device for rhizome Chinese herbal medicine seedlings, which includes two ceramic hot-melt pieces for hot-melting the films on both sides of the seedlings to form two hot-melt belts. However, this technical solution has the following defects: (1) the long strip-shaped hot-melt belt is prone to breakage during the process of tearing the upper film and the lower film; (2) the two parallel hot-melt belts formed by applying the above structure to the packaging of bare seedlings such as sweet potato seedlings with leaves cannot effectively fix the bare seedlings, and the bare seedlings are prone to misalignment; (3) the positioning mechanism on the conveying belt in CN118953794A is only suitable for seedlings such as Chinese herbal medicine seedlings that are regular in shape, and has poor positioning effect on seedlings such as sweet potato seedlings that have multiple leaves and are irregular in shape. Moreover, the ceramic hot-melt pieces may burn the conveying belt during the process of film pressing, and the firmness of the pressed belt cannot be guaranteed; (4) if the upper film and the lower film are not attached during the hot-melting process, the ceramic hot-melt pieces may first contact the upper film, which may cause deformation or breakage of the upper film, thereby affecting the packaging quality. Therefore, it is urgent to develop a film-pressing technology that is suitable for the characteristics of bare seedlings and can guarantee the packaging quality and the stability of subsequent use. SUMMARY

[0003] The present application aims to overcome the deficiencies in the prior art, and provides a bare seedling belt film-pressing mechanism and a film-pressing method for mechanized transplanting, which can adapt to the characteristics of bare seedlings for film-pressing operation, guarantee the packaging quality, and ensure the stability of subsequent use.

[0004] Technical solution: To achieve the above-mentioned purpose, the naked seedling tape hot film mechanism for mechanized transplanting of the application comprises a hot knife mechanism and a naked seedling jig, the hot knife mechanism comprises a seat body and a hot film unit fixed on the seat body; the naked seedling jig has a backing plate matched with the hot film unit;

[0005] The naked seedling jig further comprises an upper seedling clamp and a lower seedling clamp separately arranged at both ends of the backing plate;

[0006] The hot knife mechanism further comprises a partition plate, the partition plate is connected to the seat body and has a gap therebetween, so that the heat of the seat body is not conducted to the partition plate; the partition plate is a U-shaped bent piece, which has a downwardly open notch, and the notch is trumpet-shaped;

[0007] The hot film unit is columnar, and the number of the hot film units is multiple, all the hot film units are arranged in two groups on both sides of the partition plate, and each group of the hot film units is arranged along a line parallel to the side edge of the notch, that is, the two arrangement lines corresponding to the two groups of hot film units also form a trumpet shape.

[0008] With the above structure, the characteristics of hot sealing of naked seedlings are fully adapted, the trumpet-shaped notch below the partition plate adapts to the shape characteristics of the naked seedlings, can cover the naked seedlings to prevent hot injury to the seedling stems and constrain the naked seedlings from deviating during the hot film process. The two rows of trumpet-shaped hot spots formed by all the hot film units not only can fully constrain the naked seedlings, but also can facilitate separation of the upper and lower films to release the naked seedlings in subsequent use.

[0009] Further, first positioning grooves and second positioning grooves are respectively formed on the upper seedling clamp and the lower seedling clamp; the width of the first positioning grooves is wider than the width of the second positioning grooves.

[0010] Further, first V-shaped grooves and second V-shaped grooves are respectively arranged above the first positioning grooves and the second positioning grooves. In this way, the head and tail of the naked seedling can be conveniently arranged in the first V-shaped grooves and the second V-shaped grooves, respectively.

[0011] Further, the partition plate is connected to the seat body by a plurality of screws; the screws are fixed relative to the seat body, the partition plate can move up and down relative to the screws, and a compression spring is arranged between the partition plate and the seat body. During the hot film operation, the lower end of the partition plate first presses the upper and lower films tightly on the backing plate, and then the seat body continues to drop by a distance so that the compression spring is compressed by a certain amount, and the hot film unit presses the upper and lower films tightly on the backing plate to form hot spots. In this way, it can be ensured that before hot film, the seedling stems of the naked seedlings are fixed in place and the upper and lower molds on both sides of the partition plate are fully adhered, ensuring successful hot film.

[0012] Further, the side surface of the seat body is also provided with heating columns, which are connected with heat sources and can transmit heat to the film pressing units. In actual use, the number of the heating columns is multiple. In one scheme, the seat body as a whole can be a medium for transmitting heat. In another scheme, the seat body can be made of non-heat-conducting material, and each heating column is connected with multiple film pressing units.

[0013] Further, the bare seedling jig further comprises a rotation prevention plate; the number of the backing plates is two, the rotation prevention plate is arranged between the two backing plates; and the two ends of the rotation prevention plate are fixedly connected with the upper seedling clamp and the lower seedling clamp respectively. The backing plate is a flexible heat insulation backing plate.

[0014] Further, the plurality of bare seedling jigs are fixed on a conveying belt, and the conveying belt can drive the bare seedling jigs to translate. In this way, the conveying belt can drive the bare seedling jigs to be sequentially arranged below the film pressing knife mechanism, so that the film pressing operation is sequentially performed to form a bare seedling belt.

[0015] The rotation prevention plate is fixed on the conveying belt by screws, and the rotation prevention plate can prevent the seedling clamp from rotating to affect the seedling clamping after long-time work. The backing plate is fixed on the conveying belt by heat fusion, which has two functions: one is to prevent the film pressing units from damaging the conveying belt, and the other is to ensure that the ends of all the film pressing units can abut against the backing plate to simultaneously perform the film pressing operation and form pressing points, and the flexible heat insulation backing plate ensures the firmness of the pressing points.

[0016] A bare seedling belt film pressing method for mechanized transplanting is applied to the bare seedling belt film pressing mechanism for mechanized transplanting, and the method comprises the following steps:

[0017] Step 1), placing a lower film between the upper seedling clamp and the lower seedling clamp, placing bare seedlings on the lower film, and placing the heads and tails of the bare seedlings on the upper seedling clamp and the lower seedling clamp respectively, and then covering the bare seedlings with an upper film;

[0018] Step 2), moving the film pressing knife mechanism towards the bare seedling jig until the pressing points are arranged in two rows in a horn shape.

[0019] Step 3), moving the film pressing knife mechanism away from the bare seedling jig.

[0020] Beneficial effects: the naked seedling tape sealing mechanism and sealing method for mechanized transplanting of the present application fully adapt to the characteristics of naked seedling sealing, the trumpet-shaped notch below the partition plate adapts to the shape characteristics of naked seedling, can cover naked seedling to prevent scalding and constrain naked seedling from deviating during sealing process. The two rows of trumpet-shaped sealing points formed by all sealing units not only can fully constrain naked seedling, but also can separate the upper and lower films to release naked seedling in subsequent use. The structure is suitable for sealing operation of naked seedling of crops such as sweet potato, Chinese herbal medicine, rice seedling and rape seedling. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structure diagram of the naked seedling tape sealing mechanism for mechanized transplanting;

[0022] Figure 2 It is a perspective view of the naked seedling tape sealing mechanism for mechanized transplanting;

[0023] Figure 3 It is a structure diagram of the naked seedling fixture;

[0024] Figure 4 It is a perspective view of the sealing knife mechanism;

[0025] Figure 5 It is a front view of the sealing knife mechanism;

[0026] Figure 6 It is a combined structure diagram of the naked seedling fixture, the conveying belt and the naked seedling tape.

[0027] In the figure: 1-sealing knife mechanism; 11-seat; 12-sealing unit; 13-partition plate; 14-screw; 15-pressing spring; 16-heating column; 2-naked seedling fixture; 21-pad; 22-upper seedling clamp; 22a-first positioning groove; 22b-first V-shaped groove; 23-lower seedling clamp; 23a-second positioning groove; 23b-second V-shaped groove; 24-anti-rotation plate; 3-conveying belt. DETAILED DESCRIPTION

[0028] The present application will be further described below in combination with the drawings.

[0029] As Figure 1 and Figure 2 shown, the naked seedling tape sealing mechanism for mechanized transplanting comprises a sealing knife mechanism 1 and a naked seedling fixture 2, the sealing knife mechanism 1 comprises a seat 11 and a sealing unit 12 fixed on the seat 11; the naked seedling fixture 2 has a pad 21 matched with the sealing unit 12;

[0030] As Figure 3 shown, the naked seedling fixture 2 further comprises an upper seedling clamp 22 and a lower seedling clamp 23 arranged at both ends of the pad 21;

[0031] As Figure 4 With Figure 5 shown, the hot knife mechanism 1 also includes a partition plate 13, which is connected to the seat body 11 and has a gap therebetween, so that the heat of the seat body 11 will not be conducted to the partition plate 13; the partition plate 13 is a U-shaped bent piece, which has a downwardly open notch, and the notch is trumpet-shaped;

[0032] The hot film unit 12 is columnar, and the number thereof is multiple, all the hot film units 12 are divided into two groups and arranged on the two sides of the partition plate 13 respectively, and each group of the hot film units 12 is arranged along a line parallel to the side of the notch, that is, the two arrangement lines corresponding to the two groups of hot film units 12 also form a trumpet shape.

[0033] In use, as Figure 6 shown, the lower film is placed between the upper seed clamp 22 and the lower seed clamp 23, the bare seed is placed on the lower film, and the head and tail of the bare seed are placed on the upper seed clamp 22 and the lower seed clamp 23 respectively, and then the upper film is covered on the bare seed. During the hot film process, the hot knife mechanism 1 moves towards the bare seed jig 2 until the partition plate 13 is buckled on the seed stem of the bare seed, and all the hot film units 12 abut the upper and lower films on the pad 21, forming two rows of hot spots arranged in a trumpet shape. Then the hot knife mechanism 1 moves away from the bare seed jig 2, that is, the hot sealing process of one bare seed is completed.

[0034] With the above structure, the characteristics of hot sealing of the bare seed are fully adapted, the trumpet-shaped notch below the partition plate 13 adapts to the shape characteristics of the bare seed, can cover the bare seed during the hot film process to prevent burning the seed stem and constrain the bare seed from deviating. The two rows of hot spots arranged in a trumpet shape formed by all the hot film units 12 not only can fully constrain the bare seed, but also can facilitate the separation of the upper and lower films to release the bare seed in subsequent use.

[0035] Preferably, as Figure 3 shown, the upper seed clamp 22 and the lower seed clamp 23 are respectively formed with a first positioning groove 22a and a second positioning groove 23a; the width of the first positioning groove 22a is wider than the width of the second positioning groove 23a. The upper portions of the first positioning groove 22a and the second positioning groove 23a are respectively provided with a first V-shaped groove 22b and a second V-shaped groove 23b. In this way, the head and tail of the bare seed can be conveniently placed in the first V-shaped groove 22b and the second V-shaped groove 23b respectively.

[0036] The partition plate 13 is connected to the seat body 11 by a plurality of screws 14, the screws 14 are fixed relative to the seat body 11, the partition plate 13 can move up and down relative to the screws 14, and a compression spring 15 is arranged between the partition plate 13 and the seat body 11. When the film pressing operation is performed, the lower end of the partition plate 13 first presses the upper and lower films to the cushion plate 21, and then the seat body 11 continues to drop by a distance so that the compression spring 15 is compressed by a certain amount, and the film pressing unit 12 presses the upper and lower films to the cushion plate 21 to form a pressing point. In this way, it can be ensured that before the film pressing, the seedling stem of the bare seedling has been fixed in place and the upper and lower molds on both sides of the partition plate 13 have also been fully attached, thereby ensuring the success of the film pressing.

[0037] The side surface of the seat body 11 is also provided with a heating column 16, the heating column 16 is connected to a heat source, and it can transmit heat to the film pressing unit 12. In actual use, the number of heating columns 16 is multiple, in one scheme, the seat body 11 as a whole can be used as a medium for transmitting heat; in another scheme, the seat body 11 can be made of non-heat-conducting material, and each heating column 16 is connected to a plurality of film pressing units 12.

[0038] The bare seedling jig 2 also includes an anti-rotation plate 24; the number of the cushion plates 21 is two, the anti-rotation plate 24 is arranged between the two cushion plates 21; and the two ends of the anti-rotation plate 24 are fixedly connected with the upper seedling clamp 22 and the lower seedling clamp 23 respectively. The cushion plate 21 is a flexible heat insulation cushion plate.

[0039] Preferably, a plurality of the bare seedling jigs 2 are fixed on the conveying belt 3, and the conveying belt 3 can drive the bare seedling jigs 2 to translate. In this way, the conveying belt 3 can sequentially drive the bare seedling jigs 2 to the lower side of the film pressing mechanism 1 to sequentially perform the film pressing operation and form a bare seedling belt.

[0040] The anti-rotation plate 24 is fixed on the conveying belt 3 by screws, and the anti-rotation plate 24 can prevent the seedling clamp from rotating and affecting the seedling clamping after long-time work. The cushion plate 21 is fixed on the conveying belt 3 by heat melting, which has two functions: one is to prevent the film pressing unit 12 from damaging the conveying belt 3, and the other is to ensure that the end portions of all the film pressing units 12 can abut against the cushion plate 21 to simultaneously perform the film pressing operation and form pressing points, and the flexible heat insulation cushion plate ensures the firmness of the pressing points.

[0041] The application also provides a bare seedling belt film pressing method for mechanized transplanting, which is applied to the bare seedling belt film pressing mechanism for mechanized transplanting, and the method comprises the following steps:

[0042] Step 1), placing the lower film between the upper seedling clamp 22 and the lower seedling clamp 23, placing the bare seedling on the lower film, and placing the head and tail of the bare seedling on the upper seedling clamp 22 and the lower seedling clamp 23 respectively, and then covering the upper film on the bare seedling;

[0043] Step 2), the hot knife mechanism 1 moves towards the direction of the bare seedling jig 2 until the partition plate 13 is buckled on the seedling stem of the bare seedling, and all the hot film units 12 abut the upper and lower films on the pad plate 21, forming two rows of hot spots in a horn-shaped arrangement;

[0044] Step 3), the hot knife mechanism 1 moves away from the direction of the bare seedling jig 2.

[0045] The above only describes the preferred embodiments of the present application, and it should be noted that those skilled in the art can make several improvements and refinements without departing from the principles of the present application, and these improvements and refinements should also be considered within the scope of protection of the present application.

Claims

1. A bare seedling hot film mechanism for mechanized transplanting, comprising a hot knife mechanism (1) and a bare seedling jig (2), wherein the hot knife mechanism (1) comprises a base (11) and a hot film unit (12) fixed on the base (11); the bare seedling jig (2) comprises a backing plate (21) used in conjunction with the hot film unit (12); and is characterized in that: The bare seedling fixture (2) further comprises an upper seedling clamp (22) and a lower seedling clamp (23) respectively disposed at two ends of the pad (21); The ironing knife mechanism (1) further comprises a partition (13), the partition (13) being connected to the base (11) with a gap therebetween; the partition (13) having a slot opening that opens downwards, and the slot being in a trumpet shape; The hot stamping units (12) are columnar and are in multiple numbers. All the hot stamping units (12) are divided into two groups and arranged on both sides of the partition (13), and each group of the hot stamping units (12) is arranged along a line parallel to the side of the slot.

2. The bare seedling hot film mechanism for mechanized transplanting according to claim 1, characterized in that: A first positioning groove (22a) and a second positioning groove (23a) are respectively formed on the upper seedling clamp (22) and the lower seedling clamp (23); the width of the first positioning groove (22a) is wider than the width of the second positioning groove (23a).

3. The bare seedling hot film mechanism for mechanized transplanting according to claim 2, characterized in that: A first V-shaped groove (22b) and a second V-shaped groove (23b) are respectively provided above the first positioning groove (22a) and the second positioning groove (23a).

4. The bare seedling hot film mechanism for mechanized transplanting according to claim 1, characterized in that: The partition (13) is connected to the base (11) via a plurality of screws (14); the partition (13) can move up and down relative to the screws (14); and a compression spring (15) is provided between the partition (13) and the base (11).

5. The bare seedling hot film mechanism for mechanized transplanting according to claim 1, characterized in that: A heating column (16) is also installed on the side of the base (11), and the heating column (16) is connected to a heat source and can transfer heat to the hot stamping unit (12).

6. The bare seedling hot film mechanism for mechanized transplanting according to claim 1, characterized in that: The naked seedling fixture (2) further includes an anti-rotation plate (24); the number of the pads (21) is two, and the anti-rotation plate (24) is placed between the two pads (21); the two ends of the anti-rotation plate (24) are respectively fixedly connected to the upper seedling clamp (22) and the lower seedling clamp (23).

7. The bare seedling hot film mechanism for mechanized transplanting according to claim 1, characterized in that: A plurality of the bare seedling jigs (2) are fixed on a conveyor belt (3), and the conveyor belt (3) can drive the bare seedling jigs (2) to move horizontally.

8. A method for hot-filming bare seedlings for mechanized transplanting, which is applied to the hot-filming bare seedling mechanism for mechanized transplanting according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: Step 1), placing the lower film between the upper seedling clamp (22) and the lower seedling clamp (23), placing the naked seedling on the lower film, and placing the head and tail of the naked seedling on the upper seedling clamp (22) and the lower seedling clamp (23) respectively, and then covering the naked seedling with the upper film; Step 2), the hot knife mechanism (1) moves toward the naked seedling fixture (2) until the partition (13) is buckled and covered on the naked seedling vines, and all the hot film units (12) press the upper and lower films against the pad (21), forming two rows of hot spots arranged in a trumpet shape; Step 3), the ironing knife mechanism (1) moves in a direction away from the bare seedling fixture (2).

Images