Pressure-free paper feeding mechanism of paper laminating machine and paper laminating machine

Abstract

The present invention discloses a pressure-free paper feeding mechanism for a paper laminating machine and the paper laminating machine, comprising a pair of gluing rollers; a first vacuum adsorption box, a top of which is rotatably provided with a plurality of first conveying wheels, each group of which is independently driven for rotation by a separate drive mechanism; a knife block disposed above the first vacuum adsorption box; and a second vacuum adsorption box, disposed side by side with the first vacuum adsorption box, a top of which is rotatably provided with a plurality of second conveying wheels, each of which is driven for rotation by a drive mechanism. A first sensor and a second sensor are respectively disposed on both sides of the top of the second vacuum adsorption box. The present invention can reduce damage to the structural strength of corrugated paper, thereby ensuring the structural strength of the corrugated paper.

Description

Technical Field

[0001] The present invention relates to the technical field of paper mounting machines, in particular to a pressure-free paper feeding mechanism of a paper mounting machine and the paper mounting machine. Background Art

[0002] Corrugated paper is a sheet made by gluing together liner paper and corrugated paper formed by corrugating rollers. It is generally divided into single-wall and multi-wall types. Laminating machines are primarily used to laminate two or more sheets of paper together. During the laminating process, the printed face paper is glued onto the underlying backing paper (corrugated paper).

[0003] Traditional paper laminating machines, such as patent CN113753622A, disclose a surface paper conveying mechanism of a paper laminating machine and its paper laminating machine. When the corrugated paper is laminated together by the paper laminating machine, the conveying power of the corrugated paper is provided by a conveying roller group. When the corrugated paper is pressed on the conveying roller group, the pair of rollers of the conveying roller group needs to give the corrugated paper enough pressing force so that the corrugated paper can be conveyed. The roller group will destroy the corrugated corrugation of the corrugated paper, causing the structural strength performance of the corrugated paper itself to be destroyed. In order to solve this problem, in the prior art, such as patents CN109693956A and CN216971394U, the corrugated paper is conveyed by a conveying wheel, which can avoid the pressure damage of the corrugated paper by the conveying roller group, and can reduce the damage to the corrugated paper to a certain extent. However, the structural strength performance of the corrugated paper will still be destroyed, as shown in the following examples: Figure 1 As shown, the corrugated paper is powered by the conveying wheel group. When the head of the corrugated paper is about to enter the gluing roller group for gluing, the gluing roller group has two functions: one is to apply glue, and the other is to provide sufficient power transmission by pressing the corrugated paper. Because once the tail of the corrugated paper is completely separated from the conveying wheel group, only the gluing roller group provides conveying power. On the conveying wheel group, there are two forces in the vertical direction at the tail of the corrugated paper, one is the downward suction force F1 of the vacuum adsorption box, and the other is a force F2 that presses the corrugated paper downward by the knife. The two forces together constitute a downward positive pressure. According to the friction formula, the friction force is naturally at a larger value. At the head of the corrugated paper, the gluing roller group must provide a sufficiently large conveying power. This conveying power must be greater than the friction force at the tail of the corrugated paper to enable the corrugated paper to be conveyed horizontally. To provide a sufficiently large conveying power, it is necessary to press the corrugated paper tighter, which is undoubtedly a destruction of the structural strength performance of the corrugated paper. Summary of the Invention

[0004] Based on the above, the object of the present invention is to provide a pressure-free paper feeding mechanism of a paper laminating machine and a paper laminating machine, which can reduce the damage to the structural strength performance of corrugated paper and ensure the structural strength of the corrugated paper.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] In one aspect, the present invention provides a pressure-free paper feeding mechanism for a paper laminating machine, comprising:

[0007] Gluing roller group;

[0008] A first vacuum adsorption box, having a plurality of first conveying wheels rotatably arranged on the top thereof, and each group of the first conveying wheels is driven to rotate by a separate driving mechanism;

[0009] A knife block is provided above the first vacuum adsorption box;

[0010] The second vacuum adsorption box is arranged side by side with the first vacuum adsorption box, and a plurality of second conveying wheels are rotatably arranged on the top thereof. The second conveying wheels are driven to rotate by a driving mechanism. The first sensor and the second sensor are respectively arranged on both sides above the second vacuum adsorption box.

[0011] Furthermore, a plurality of vacuum adsorption holes are provided on the top of each of the first vacuum adsorption box and the second vacuum adsorption box.

[0012] Furthermore, the first vacuum adsorption box is connected to a first fan, and the second vacuum adsorption box is connected to a second fan.

[0013] Furthermore, the first vacuum adsorption box is connected to a large fan through a first pipeline;

[0014] The second vacuum adsorption box is connected to the first pipeline through a second pipeline, and the second pipeline is provided with a valve for controlling the opening or closing of the second pipeline;

[0015] An air control component is provided at the location where the first vacuum adsorption box and the first pipeline are connected.

[0016] Furthermore, a vent is provided at the bottom of the first vacuum adsorption box, and the first vacuum adsorption box is connected to the first pipeline through the vent;

[0017] The wind control assembly includes a wind shield and a handle connected to the wind shield, and the handle extends out of the first vacuum adsorption box.

[0018] Furthermore, the distance between the knife block and the first sensor in the horizontal direction is less than 10 cm.

[0019] Furthermore, the length of the corrugated paper in the horizontal direction is greater than the length of the second vacuum adsorption box.

[0020] Furthermore, the position of the first sensor is adjustable, and the distance between the first sensor and the gluing roller pair in the horizontal direction is less than or equal to the length of the corrugated paper.

[0021] Furthermore, the first sensor and the second sensor are both electric eyes.

[0022] On the other hand, a paper laminating machine is provided, comprising the above-mentioned pressure-free paper feeding mechanism of the paper laminating machine.

[0023] The beneficial effects of the present invention are:

[0024] The embodiment of the present invention provides a pressure-free paper feeding mechanism for a paper laminating machine, wherein a second vacuum adsorption box is provided. Before the head of the corrugated paper is conveyed to the gluing roller group, a conveying force is provided by the first conveying wheel and the second conveying wheel. When the head of the corrugated paper is about to enter the gluing roller group, the tail of the corrugated paper has already passed the first vacuum adsorption box and the knife stop, and the tail of the corrugated paper is just below the first sensor. When the head of the corrugated paper enters the gluing roller group, the tail of the corrugated paper simultaneously passes below the first sensor. After the first sensor senses it, the second vacuum adsorption box stops generating vacuum adsorption force. At this time, the corrugated paper is not subjected to the vertical downward vacuum adsorption force and the downward pressure of the knife stop. The corresponding friction between the corrugated paper and the second vacuum adsorption box is greatly reduced, the conveying force required to be provided by the gluing roller group is also small, and the pressing force of the gluing roller group on the corrugated paper is also reduced, which can reduce the damage to the structural strength performance of the corrugated paper and ensure the structural strength of the corrugated paper. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0026] Figure 1 It is a structural diagram of the paper feeding mechanism in the prior art;

[0027] Figure 2 A structural schematic diagram of a pressure-free paper feeding mechanism of a paper laminating machine is provided for the first embodiment of the present invention;

[0028] Figure 3 Another structural schematic diagram of a pressure-free paper feeding mechanism of a paper laminating machine is provided for the first embodiment of the present invention;

[0029] Figure 4 Another structural schematic diagram of a pressure-free paper feeding mechanism of a paper laminating machine is provided for the first embodiment of the present invention;

[0030] Figure 5 A schematic diagram of the bottom structure of a first vacuum adsorption box of a pressure-free paper feeding mechanism of a paper laminating machine is provided in accordance with a first embodiment of the present invention.

[0031] In the picture:

[0032] 1. First vacuum adsorption box; 11. First conveying wheel; 12. Wind control assembly; 121. Wind shield; 122. Handle; 13. Ventilation port; 2. Knife block; 3. Gluing roller group; 4. Second vacuum adsorption box; 41. Second conveying wheel; 51. First sensor; 52. Second sensor; 6. First fan; 7. Second fan; 8. Large fan; 81. First pipeline; 82. Second pipeline; 83. Valve; 9. Corrugated paper. DETAILED DESCRIPTION

[0033] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention more clearly understood, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It is apparent that the described embodiments are only some of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0034] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0035] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "left," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0037] Example 1

[0038] like Figure 2 (A) and (B) show a process diagram of corrugated paper 9 being conveyed on a pressure-free paper feeding mechanism of a paper laminating machine. An embodiment of the present invention provides a pressure-free paper feeding mechanism of a paper laminating machine, comprising: a pair of gluing rollers 3; a first vacuum adsorption box 1, the first vacuum adsorption box 1 being capable of generating a vacuum adsorption force, and having a plurality of first conveying wheels 11 rotatably arranged on its top, preferably, four groups of the first conveying wheels 11 are provided; only the top parts of the plurality of first conveying wheels 11 extend out of the top of the first vacuum adsorption box 1, in order to ensure that the first conveying wheels 11 can rotate and generate a downward adsorption force, a gap is provided around the first conveying wheels 11, and the gap and the part thereof extend into the first vacuum adsorption box 1, and each group of the first conveying wheels 11 are driven to rotate by a separate driving mechanism; a knife block 2, provided above the first vacuum adsorption box 1, specifically, the knife block 2 is provided above the head of the first vacuum adsorption box 1 along the length direction; a second vacuum adsorption box 4, the first conveying wheels 11 being capable of rotating and generating a downward adsorption force, and a gap is provided around the first conveying wheels 11, and the gap and the part thereof extend into the first vacuum adsorption box 1, and each group of the first conveying wheels 11 are driven to rotate by a separate driving mechanism; a knife block 2, provided above the first vacuum adsorption box 1, specifically, the knife block 2 is provided above the head of the first vacuum adsorption box 1 along the length direction; a second vacuum adsorption box 4, the first conveying wheels 11 being capable of rotating and generating a downward adsorption force; a gap is provided around the first conveying wheels 11, and the gap and the part thereof extend into the first vacuum adsorption box 1, and each group of the first conveying wheels 11 are driven to rotate by a separate driving mechanism; a knife block 2, provided above the first vacuum adsorption box 1 The second vacuum adsorption box 4 is capable of generating a vacuum adsorption force and is arranged side by side with the first vacuum adsorption box 1. A plurality of second conveying wheels 41 are rotatably arranged on the top thereof. Preferably, two groups of the second conveying wheels 41 are provided, and only the top portions of the plurality of second conveying wheels 41 extend out of the top of the second vacuum adsorption box 4. To ensure that the second conveying wheels 41 can rotate and generate a downward adsorption force, a gap is provided around the second conveying wheels 41, and the second conveying wheels 41 partially extend into the second vacuum adsorption box 4. The second conveying wheels 41 are driven to rotate synchronously by a driving mechanism. The horizontal length of the corrugated paper 9 is greater than that of the second vacuum adsorption box 4. A first sensor 51 and a second sensor 52 are respectively provided on both sides of the upper portion of the second vacuum adsorption box 4. Preferably, the first sensor 51 and the second sensor 52 are both electric eyes. The horizontal distance between the knife block 2 and the first sensor 51 is less than 10 cm.

[0039] An embodiment of the present invention provides a pressure-free paper feeding mechanism for a paper laminating machine, the working principle of which is as follows: corrugated paper 9 is first conveyed on the first conveying wheel 11 on the first vacuum adsorption box 1. The first vacuum adsorption box 1 will always generate a downward vacuum adsorption force. When the head of the corrugated paper 9 enters the second conveying wheel 41 on the second vacuum adsorption box 4 for conveyance, the second vacuum adsorption box 4 does not generate a downward vacuum adsorption force at this time. However, when the first sensor 51 senses that the corrugated paper 9 has entered the second vacuum adsorption box 4, the second sensor 52 is energized. When the corrugated paper 9 continues to be conveyed on the second vacuum adsorption box 4, when the corrugated paper 9 passes under the second sensor 52, the second sensor 52 senses the corrugated paper 9, and at this time the second vacuum adsorption box 4 generates a downward vacuum adsorption force. It should be noted that the vacuum adsorption force generated by the second vacuum adsorption box 4 is much greater than the vacuum adsorption force generated by the first vacuum adsorption box 1. The corrugated paper 9 continues to be conveyed. When the tail of the corrugated paper 9 passes under the first sensor 51, the first sensor 51 senses that the corrugated paper 9 has passed, and the second vacuum adsorption box 4 stops generating vacuum adsorption force. Preferably, the position of the first sensor 51 is adjustable, and the horizontal distance between the first sensor 51 and the gluing roller group 3 is less than or equal to the length of the corrugated paper 9. When the second vacuum adsorption box 4 stops generating vacuum adsorption force, the head of the corrugated paper 9 enters the gluing roller group 3. Since the second vacuum adsorption box 4 stops generating vacuum adsorption force, the friction force of the corrugated paper 9 on the second conveying wheel 41 becomes smaller, the conveying power required to be provided by the gluing roller group 3 is also smaller, and the pressing force of the gluing roller group 3 on the corrugated paper 9 is also reduced, which can reduce the damage to the structural strength performance of the corrugated paper 9 and ensure the structural strength of the corrugated paper 9. It should be noted that, as another embodiment, when the length of the corrugated paper 9 is small, the length of the corrugated paper 9 is less than the distance between the first sensor 51 and the second sensor 52, when the first sensor 51 senses the corrugated paper, the second vacuum adsorption box 4 immediately generates a vacuum adsorption force, and when the first sensor 51 cannot sense the corrugated paper, the second vacuum adsorption box 4 stops generating a vacuum adsorption force.

[0040] As a preferred embodiment of the present invention, the tops of the first vacuum adsorption box 1 and the second vacuum adsorption box 4 are both provided with a plurality of vacuum adsorption holes (not shown in the figure), and the plurality of vacuum adsorption holes are evenly distributed on the tops of the vacuum adsorption boxes and are connected to the vacuum adsorption boxes, so that the generated vacuum adsorption force is larger and more uniform.

[0041] As a preferred embodiment of the present invention, Figure 3As shown, in order to enable both the first vacuum adsorption box 1 and the second vacuum adsorption box 4 to generate vacuum adsorption force, the first vacuum adsorption box 1 is connected to the first fan 6, and the second vacuum adsorption box 4 is connected to the second fan 7. Specifically, the first vacuum adsorption box 1 is connected to the first fan 6 to generate vacuum adsorption force, and the second vacuum adsorption box 4 is connected to the second fan 7 to generate vacuum adsorption force.

[0042] In the above implementation, two fans are used, which increases the equipment cost and makes the power consumption of the equipment larger. In order to solve this problem, as a preferred embodiment of the present invention, Figure 4 As shown, the first vacuum adsorption box 1 is connected to a large fan 8 via a first pipe 81; the second vacuum adsorption box 4 is connected to the first pipe 81 via a second pipe 82. The second pipe 82 is provided with a valve 83, which controls the opening or closing of the second pipe 82. The valve 83 is a damper. The connection between the first vacuum adsorption box 1 and the first pipe 81 is provided with an air control assembly 12. Specifically, in this embodiment of the present invention, when the corrugated paper 9 is conveyed in the first vacuum adsorption box 1, the valve 83 is closed, and only the first vacuum adsorption box 1 generates vacuum force. The valve 83 opens only when the head of the corrugated paper 9 passes the second sensor 52. At this time, the second vacuum adsorption box 4 and the first vacuum adsorption box 1 both generate vacuum force. When the tail of the corrugated paper 9 passes the first sensor 51, the valve 83 closes again, the second vacuum adsorption box 4 stops generating vacuum force, and only the first vacuum adsorption box 1 continues to generate vacuum force. In the embodiment of the present invention, the large fan 8, valve 83, first sensor 51 and second sensor 52 are coordinated to control whether the second vacuum adsorption box 4 generates vacuum adsorption force. Compared with the previous embodiment, the equipment cost is reduced and energy saving is more significant. Furthermore, since the same fan is used, how to make the adsorption force of the first vacuum adsorption box 1 smaller than that of the second vacuum adsorption box 4 becomes a problem that needs to be solved. Figure 5 As shown, as a preferred embodiment of the present invention, a vent 13 is provided at the bottom of the first vacuum adsorption box 1, and the first vacuum adsorption box 1 is connected to the first pipe 81 through the vent 13; the wind control component 12 includes a windshield 121 and a handle 122 connected to the windshield 121, and the handle 122 extends out of the first vacuum adsorption box 1. Specifically, in the embodiment of the present invention, the front and rear positions of the wind control component 12 can be adjusted manually, and the size of the vent 13 can be controlled by the windshield 121, so that the adsorption force of the first vacuum adsorption box 1 is smaller than that of the second vacuum adsorption box 4, and the structure is simple and easy to operate. It should be noted that the large fan can also be connected to a frequency converter, and its frequency can be adjusted by frequency conversion, so that the speed of the large fan can be adjusted, thereby adjusting the suction force of the large fan.

[0043] An embodiment of the present invention provides a pressure-free paper feeding mechanism for a paper laminating machine, in which a second vacuum adsorption box 4 is provided. Before the head of the corrugated paper 9 is conveyed to the gluing roller group 3, conveying power is provided by the first conveying wheel 11 and the second conveying wheel 41. When the head of the corrugated paper 9 is about to enter the gluing roller group 3, the tail of the corrugated paper 9 has already passed the first vacuum adsorption box 1 and the knife stop 2, and the tail of the corrugated paper 9 is just below the first sensor 51. When the head of the corrugated paper 9 enters the gluing roller group 3, the tail of the corrugated paper 9 passes under the first sensor 51 at the same time. After the first sensor 51 senses it, the second vacuum adsorption box 4 stops generating vacuum adsorption force. At this time, the corrugated paper 9 is not subjected to the vertical downward vacuum adsorption force and the downward pressure of the knife block 2. The corresponding friction between the corrugated paper 9 and the second vacuum adsorption box 4 becomes much smaller, and the conveying power that the gluing roller group 3 needs to provide is also smaller. The pressing force of the gluing roller group 3 on the corrugated paper 9 also becomes smaller, which can reduce the damage to the structural strength performance of the corrugated paper 9 and ensure the structural strength of the corrugated paper 9.

[0044] Example 2

[0045] An embodiment of the present invention provides a paper laminating machine including the pressure-free paper feeding mechanism of the paper laminating machine described in the first embodiment.

[0046] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A pressure-free paper feeding mechanism for a paper laminating machine, characterized in that: include: Gluing roller group (3); A first vacuum adsorption box (1), having a plurality of first conveying wheels (11) rotatably arranged on the top thereof, each group of the first conveying wheels (11) being driven to rotate by a separate driving mechanism; A knife block (2) is arranged above the first vacuum adsorption box (1); A second vacuum adsorption box (4) is arranged side by side with the first vacuum adsorption box (1), and a plurality of second conveying wheels (41) are rotatably arranged on the top of the second vacuum adsorption box (4), and the second conveying wheels (41) are driven to rotate by a driving mechanism. A first sensor (51) and a second sensor (52) are respectively arranged on both sides of the upper side of the second vacuum adsorption box (4); The corrugated paper is conveyed on the first conveying wheel on the first vacuum adsorption box. The first vacuum adsorption box will always generate a downward vacuum adsorption force. When the head of the corrugated paper enters the second conveying wheel on the second vacuum adsorption box for conveying, the second vacuum adsorption box does not generate a downward vacuum adsorption force at this time. When the first sensor senses that the corrugated paper enters the second vacuum adsorption box, the second sensor is energized, and the corrugated paper continues to be conveyed on the second vacuum adsorption box. When the corrugated paper passes under the second sensor, the second sensor senses the corrugated paper. At this time, the second vacuum adsorption box generates a downward vacuum adsorption force. When the tail of the corrugated paper passes under the first sensor, the first sensor senses that the corrugated paper has passed. At this time, the second vacuum adsorption box stops generating vacuum adsorption force, and at the same time, the head of the corrugated paper enters the gluing roller group.

2. The pressure-free paper feeding mechanism of a paper laminating machine according to claim 1, characterized in that: The tops of the first vacuum adsorption box (1) and the second vacuum adsorption box (4) are both provided with a plurality of vacuum adsorption holes.

3. A pressure-free paper feeding mechanism for a paper laminating machine according to claim 1 or 2, characterized in that: The first vacuum adsorption box (1) is connected to a first fan (6), and the second vacuum adsorption box (4) is connected to a second fan (7).

4. A pressure-free paper feeding mechanism for a paper laminating machine according to claim 1 or 2, characterized in that: The first vacuum adsorption box (1) is connected to a large fan (8) via a first pipe (81); The second vacuum adsorption box (4) is connected to the first pipeline (81) via a second pipeline (82), and a valve (83) for controlling the opening or closing of the second pipeline (82) is provided on the second pipeline (82); An air control component (12) is provided at the location where the first vacuum adsorption box (1) and the first pipeline (81) are connected.

5. The pressure-free paper feeding mechanism of a paper laminating machine according to claim 4, characterized in that: A vent (13) is provided at the bottom of the first vacuum adsorption box (1), and the first vacuum adsorption box (1) is connected to the first pipe (81) through the vent (13); The wind control assembly (12) comprises a wind shield (121) and a handle (122) connected to the wind shield (121), wherein the handle (122) extends out of the first vacuum adsorption box (1).

6. The pressure-free paper feeding mechanism of a paper laminating machine according to claim 5, characterized in that: The distance between the knife block (2) and the first sensor (51) in the horizontal direction is less than 10 cm.

7. The pressure-free paper feeding mechanism of a paper laminating machine according to claim 5, characterized in that: The length of the corrugated paper in the horizontal direction is greater than the length of the second vacuum adsorption box (4).

8. The pressure-free paper feeding mechanism of a paper laminating machine according to claim 1, characterized in that: The position of the first sensor (51) is adjustable, and the distance between the first sensor (51) and the gluing roller group (3) in the horizontal direction is less than or equal to the length of the corrugated paper.

9. The pressure-free paper feeding mechanism of a paper laminating machine according to claim 1, characterized in that: The first sensor (51) and the second sensor (52) are both electric eyes.

10. A paper mounting machine, characterized in that: The invention comprises the pressure-free paper feeding mechanism of a paper laminating machine as described in any one of claims 1 to 9.

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