Single facer for producing bonded edge tips, paper making method and production line

Abstract

The invention relates to the field of corrugated paper production, in particular to a single facer for producing bonded corrugated tips, which at least comprises two groups of corrugated roller components for contacting the corrugated tips, and is characterized by further comprising a heating roller, the roller surface of the heating roller is adjacent to the roller surface of any one group of corrugated roller components, and the heating roller is connected with the corrugated roller components. Through the gap formed by the arrangement, passive following of the heating roller under the friction action of paper is generated; the passive transmission heating roller is selected to replace a traction belt in the prior art, the linear speed of the heating roller is consistent with that of the surface paper in the mode that the surface paper pulls the heating roller to rotate, in other words, when the paper is jointed, the paper is not affected by a transmission mechanism in the single facer, and the paper is not prone to being damaged. The problems of secondary meshing, slipping, weak bonding effect, poor core paper consistency and the like in the prior art are solved.

Description

Technical Field

[0001] This invention relates to the field of corrugated paper production, and more particularly to a single-facer, method and production line for producing corrugated tips bonded together. Background Technology

[0002] A single-facer is an existing piece of equipment used to produce corrugated paper.

[0003] As required by the customer, corrugated cardboard with tip-to-tip bonding needs to be produced, such as... Figure 7 As shown, the main feature of this corrugated cardboard is that it can save costs. Structurally, this can reduce the amount of one layer of paper used. On this basis, the amount of glue applied to this layer of paper can also be further controlled and reduced.

[0004] Figure 8 This is a widely used type of corrugated cardboard today. Producing this type of cardboard requires at least two single-facers, one gluing machine, and one double-facer. It's important to understand that the cardboard from the two single-facers needs to be reheated during the double-facer lamination process. This secondary heating can easily dry out the paper's original moisture, making it prone to deformation. Furthermore, this five-layer cardboard means there are four gluing points, compared to... Figure 7 This tip-to-tip method of corrugated cardboard currently results in a higher glue consumption and deformation issues. Therefore, the new corrugated cardboard is more environmentally friendly and stable.

[0005] Currently, the equipment used to produce this type of corrugated cardboard includes the following existing technologies: application number 202323046881.4 entitled "A Multifunctional Corrugating Machine for Producing Tip-to-Tip Corrugated Cardboard"; and patent number 202222297168.6 entitled "A New Type of Three-Layer Corrugated Cardboard Production Equipment." Both of these devices, without exception, have very low production efficiency. The multifunctional corrugating machine, in particular, has a production capacity below 50 m³ / min, and the quality of the produced corrugated cardboard is relatively low. Generally, the minimum production capacity should be at least 150 m³ / min. Therefore, the existing technology has very low production capacity, which means a heavier cost burden for manufacturers.

[0006] The reason why the above-mentioned equipment has a low production capacity is mainly due to structural limitations. To achieve a production capacity of 400m / min, the aforementioned problems must be solved. Specifically, this can be analyzed from the patent application number 202323046881.4 entitled "A Multifunctional Corrugated Machine for Producing Tip-to-Tip Cardboard" (hereinafter referred to as the patent in question):

[0007] 1. The linear velocities of the various parts in the patent in question cannot actually achieve completely identical results. The patent specification

[0049] and

[0056] mention that the power device drives the pressing mechanism and the corrugated roller to rotate synchronously. The power device includes a first motor, and the output end of the first motor is connected to the first drive roller through a first speed-changing transmission mechanism. Although the specification does not mention how the first motor drives the synchronous rotation of the corrugated roller, based on the known information, it is clearly impossible to achieve synchronous rotation between the pressing mechanism and the corrugated roller driven by the power device. Moreover, the corrugated roller includes an upper corrugated roller and a lower corrugated roller, and the first motor only has one motor shaft. To drive both rollers simultaneously, an additional transmission structure is obviously required. Therefore, after using both the transmission structure and the speed-changing transmission mechanism, the difference in linear velocity between the two will inevitably increase. Both the corrugated roller and the first drive roller rotate through a transmission mechanism via an active driving force. This error value... At low production speeds, this is acceptable, as the adhesive stays in the heating zone for a longer time, allowing for a basic bonding effect even if synchronization is not possible. However, the face paper and core paper are in direct point contact, and the core paper is corrugated. The adhesive is applied to the crests of the corrugations, and the amount of adhesive applied is minimal. With inconsistent line speeds, the face paper will rub off some of the adhesive from the corrugations, resulting in the actual adhesive content in the bonding area being less than the predetermined value. In addition, at a production speed of 150m / min, the heating time is very short, leading to poor adhesion.

[0008] 2. The second problem is that slippage can occur between the traction belt and the drive wheel (output end of the first motor). In fact, due to the material, there will be an elastic slippage effect. The linear speed of the traction belt is always less than the linear speed of the drive wheel. Therefore, the asynchrony between the linear speed of the traction belt and the linear speed of the corrugated roller will also cause the above-mentioned problem.

[0009] 3. The third issue is that the use of the traction belt requires a means of correction. One factor contributing to this need is the inconsistent linear speeds at both ends of the drive roller. The end of the drive roller driven by the first motor rotates preferentially relative to the other end, although this difference is relatively small. However, with increased usage time, this unevenly distributed tension in the width direction of the traction belt eventually causes it to deviate. The biggest problem with this deviation is that it leads to secondary meshing between the core paper layers. According to the corrugated cardboard produced by the patent in question, the first layer is a flat cardboard, while the second and third layers are corrugated cardboard. Secondary meshing means that the corrugated tips of the second and third layers mesh with each other, which results in the corrugated cardboard failing to achieve a basic cushioning effect.

[0010] 4. The fourth issue is that the first pressure adjusting mechanism in the patent in question includes a first tension roller and a first cylinder. For the traction belt to move the face paper, there must be friction to drag it. To obtain this friction, the traction belt must be taut. When taut, the traction belt... Figure 2 The area between the two driven rollers is straight. At this time, the traction belt will press down on the face paper, which causes the two layers of core paper to collapse. Therefore, in order to avoid this collapse, the traction belt will inevitably slip due to insufficient friction at high speed.

[0011] 5. The fifth issue is that, due to the use of a traction belt, which is made of insulating material, the patent in question involves bonding a heating plate to the face paper. According to the specification, the heating plate contacts the traction belt to heat and support it. The heating plate supports the traction belt as it moves to that position, allowing for a longer bonding time between the two layers of core paper and face paper during the pressing and bonding process of the pressure belt and traction belt, thus improving the stability and effectiveness of the bond. However, the specification also indicates a significant frictional force between the face paper and the heating plate. This could cause the face paper to shift relative to the core paper due to the influence of the heating plate. Summary of the Invention

[0012] To address the aforementioned problems, this invention provides a single-sided machine, method, and production line for producing bonding of corrugated tips, aiming to solve the above-mentioned technical issues.

[0013] To achieve the above objectives, the technical solution adopted by the present invention is: a single-facer for producing corrugated tips bonded together, comprising at least two sets of corrugated roller assemblies that allow the corrugated tips to contact each other, characterized in that it further comprises a heating roller, the roller surface of which is arranged adjacent to the roller surface of any set of corrugated roller assemblies, and the gap formed by this arrangement generates a passive following of the heating roller under the friction of the paper.

[0014] The beneficial effects of this invention are:

[0015] This invention uses a passively driven heating roller instead of the traction belt in the prior art. When the heating roller rotates while the face paper is pulling it, the linear speed of the heating roller is the same as that of the face paper. In other words, when the paper is bonded, it will not be affected by the transmission mechanism inside the single-facer, thus solving various problems in the prior art such as secondary engagement, slippage, weak bonding effect, and poor core paper consistency.

[0016] The heating rollers are provided in at least two sets, so that the roller surface of the corrugated roller assembly always has a joint area that allows the paper to make full contact during rotation; two or more sets of heating rollers can force the face paper and the multi-layer core paper to maintain the same curvature in a certain area, which solves the problem that the face paper will curl up due to insufficient adhesion in the early stage of bonding.

[0017] The heating roller has a steam channel inside, through which steam is allowed to pass, enabling the roller surface to heat up quickly, shortening the time required for adhesive bonding, thereby reducing the bonding area and making the equipment structure more compact.

[0018] The corrugated roll assembly includes a sizing mechanism, an upper corrugated roll, and a lower corrugated roll. The corrugated roll assembly is existing technology, and its specific structure, function, and connection method will not be described in detail here.

[0019] The corrugated rolls in at least two corrugated roll assemblies are driven by the same motor using a drive gear, and the ends of the corrugated rolls have driven gears that mesh with the drive gear.

[0020] This invention is used in conjunction with a traction mechanism. The bonded face paper and core paper are pulled by the traction roller in the traction mechanism. The traction roller and the corrugated roller in the traction mechanism have the same size, diameter and weight, for example, both with a diameter of 540mm. In this case, by selecting the same motor and gears, the linear speed of the traction roller and the corrugated roller can be kept consistent, that is, the linear speed of the face paper and the core paper can be kept consistent.

[0021] It also includes a corner adjustment mechanism and a heating cylinder. In this embodiment, the heating cylinder, corner adjustment mechanism, corrugated roll assembly, and heating roller are all located within the body of the single-facer. The corner adjustment mechanism and the heating cylinder are both located above the heating roller. The corner adjustment mechanism includes a corner roll, a drive motor, a transmission component, and a rotating component. There are at least two sets of corner rolls. The roll surfaces of the corner roll, the heating cylinder, and the heating roller are corresponding to each other. The corner roll is mounted on the rotating component. The drive motor drives the rotating component to rotate through the transmission component, so that the corner roll rotates along the edge of the heating cylinder roll surface. When the paper temperature is not at the preset value, the corner is increased to increase the contact area between the paper and the heating cylinder. By increasing the heating time, the paper can obtain sufficient heat.

[0022] The specific method for producing the above-mentioned corrugated paper is as follows:

[0023] The first core paper and the second core paper are respectively fed into the machine. After being squeezed by the first lower corrugated roller and the first upper corrugated roller, the first core paper forms a corrugated shape. After the first core paper passes through the first glue roller, the glue on the first glue roller sticks to the crest of one side of the first core paper. At the same time, the second core paper forms a corrugated shape under the squeezing of the second upper corrugated roller and the second lower corrugated roller. The first upper corrugated roller and the second upper corrugated roller are in rigid contact. The crest of the first core paper with glue comes into contact with the crest of the second core paper.

[0024] Driven by the corrugated rollers, the other side of the first core paper comes into contact with the glue on the second glue roller and then comes to the area where it contacts the face paper. Under the action of the heating rollers, the face paper is brought closer to the core paper with relatively light pressure. After passing through all the heating rollers, the first core paper, the second core paper, and the face paper are completely bonded and fixed.

[0025] A production line for producing corrugated cardboard includes a heating cylinder, a paper rack, a double-facer, a splicer, a gluer, an ear-cutting machine, a slitting machine, a cross-cutting machine, and a stacker. The production line is characterized by further including the aforementioned single-facer; the splicer's feed port is used to feed paper into the single-facer; the gluer is used to provide glue to the face paper; the double-facer is used to press the face paper and the paper together to form corrugated cardboard; the slitting machine and the cross-cutting machine are used to cut the corrugated cardboard into multiple specified patterns; and the stacker is used to stack the cut corrugated cardboard.

[0026] The heating cylinder, paper rack, double-sided machine, paper splicer, gluing machine, ear cutting machine, slitting machine, cross-cutting machine, and stacking machine are all existing technologies, and their structures will not be described in detail. Attached Figure Description

[0027] Figure 1 This is a cross-sectional view of the present invention.

[0028] Figure 2 yes Figure 1 Enlarged diagram of point A.

[0029] Figure 3 yes Figure 2 Enlarged diagram of point B.

[0030] Figure 4 This is a schematic diagram of the paper bonding process.

[0031] Figure 5 This is a schematic diagram of the face paper in the corner adjustment mechanism.

[0032] Figure 6 yes Figure 5 The state diagram after adjusting the wrap angle.

[0033] Figure 7 This is a schematic diagram of the bonding of the face paper and the core paper.

[0034] Figure 8 It is an existing corrugated paper structure.

[0035] Figure 9 This is a side view of a corrugated paper production line.

[0036] Figure 10 yes Figure 9 Enlarged diagram of point C.

[0037] Figure 11 yes Figure 9Enlarged diagram of point D.

[0038] Figure 12 yes Figure 9 Enlarged diagram of point E.

[0039] Figure 13 yes Figure 9 Enlarged schematic diagram at point F. Detailed Implementation

[0040] like Figure 1-7 As shown, a single-facer for producing corrugated tips bonded together includes at least two sets of corrugated roller assemblies 1 that bring the corrugated tips into contact. The feature is that it also includes a heating roller 2, the roller surface of which is arranged adjacent to the roller surface of any set of corrugated roller assemblies 1. The gap d1 formed by this arrangement causes the heating roller 2 to passively follow the paper under friction.

[0041] The beneficial effects of this invention are:

[0042] The present invention uses a passively driven heating roller 2 to replace the traction belt of the prior art. When the heating roller 2 is rotated by the face paper 4a, the linear speed of the heating roller 2 is the same as the linear speed of the face paper 4a. In other words, when the paper is joined, it will not be affected by the transmission mechanism in the single-facer as in the prior art, thus solving various problems such as secondary engagement and slippage in the prior art.

[0043] The heating rollers 2 are provided in at least two sets, so that the roller surface of the corrugated roller assembly 1 always has a joint area 31 that allows the paper to make full contact during rotation; two or more sets of heating rollers 2 can force the face paper 4a and the multilayer core paper to maintain the same curvature in a certain area, which solves the problem that the face paper 4a will lift up due to insufficient adhesion in the early stage of bonding.

[0044] Steam is circulated inside the heating roller 2, which heats up rapidly, shortens the time required for adhesive bonding, thereby reducing the bonding area and making the equipment structure more compact.

[0045] The corrugated roll assembly 1 includes a sizing mechanism, a pressure roll, and a corrugated roll. The corrugated roll assembly 1 is existing technology, and its specific structure, function, and connection method will not be described in detail.

[0046] The corrugated rolls in the two corrugated roll assemblies 1 are driven by the same motor using a drive gear, and the ends of the corrugated rolls have driven gears that mesh with the drive gear.

[0047] This invention is used in conjunction with a traction mechanism. The bonded face paper and core paper are pulled by the traction roller in the traction mechanism. The traction roller and the two upper corrugated rollers in the traction mechanism are the same size and weight, for example, the diameter is 540mm. At this time, by selecting the same motor and gears, the linear speed of the traction roller and the corrugated roller can be kept consistent, that is, the linear speed of the face paper 4a and the core paper can be kept consistent.

[0048] It also includes a corner adjustment mechanism and a heating cylinder 8. In this embodiment, the heating cylinder 8, the corner adjustment mechanism, the corrugated roll assembly 1, and the heating roller 2 are all located within the body of the single-facer. The corner adjustment mechanism and the heating cylinder 8 are both located above the heating roller 2. The corner adjustment mechanism includes a corner roll 91, a drive motor 92, a transmission component 93, and a rotating component 94. There are at least two sets of corner rolls 91. The roll surfaces of the corner rolls 91, the roll surfaces of the heating cylinder 8, and the roll surfaces of the heating roller 2 are corresponding to each other. The corner rolls 91 are mounted on the rotating component 94. The drive motor 92 drives the rotating component 94 to rotate through the transmission component 93, so that the corner rolls 91 rotate outside the edge of the roll surface of the heating cylinder 8. When the paper temperature is not at the preset value, the corner is increased to increase the contact area between the face paper 4a and the heating cylinder 8. By increasing the heating time, the face paper 4a can obtain sufficient heat.

[0049] The specific method for producing the above-mentioned corrugated paper is as follows:

[0050] The first core paper 4b and the second core paper 4c are respectively connected. The first core paper 4b is squeezed by the first lower corrugated roller 5a and the first upper corrugated roller 6a to form a corrugated shape. After the first core paper 4b passes through the first glue roller 7a, the glue on the first glue roller 7a sticks to the crest of one side of the first core paper 4b. At the same time, the second core paper 4c is squeezed by the second lower corrugated roller 5b and the second upper corrugated roller 6b to form a corrugated shape. The first upper corrugated roller 6a and the second upper corrugated roller 6b are in rigid contact. The crest of the first core paper 4b with glue is in contact with the crest of the second core paper 4c.

[0051] Driven by the corrugated rollers, the other crest of the first core paper 4b comes into contact with the glue on the second glue roller 7b and comes to the area where it contacts the face paper 4a. Under the action of the heating roller 2, the face paper 4a is brought closer to the core paper in a relatively light pressure. After passing through all the heating rollers 2, the first core paper 4b, the second core paper 4c, and the face paper 4a are completely bonded and fixed.

[0052] like Figure 8-13As shown, a production line for producing corrugated cardboard includes a heating cylinder, a paper rack, a double-facer, a splicer, a gluer, an ear-cutting machine, a slitting machine, a cross-cutting machine, and a stacker. The production line is characterized by further including the aforementioned single-facer. The splicer's feed port is used to feed paper into the single-facer. The gluer is used to provide glue to the face paper. The double-facer is used to press the face paper and the paper together to form corrugated cardboard. The slitting machine and the cross-cutting machine are used to cut the corrugated cardboard into multiple specified patterns. The stacker is used to stack the cut corrugated cardboard.

[0053] The heating cylinder, paper rack, double-sided machine, paper splicer, gluing machine, ear cutting machine, slitting machine, cross-cutting machine, and stacking machine are all existing technologies, and their structures will not be described in detail.

[0054] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A single-facer for producing corrugated tips bonded together, comprising at least two sets of corrugated roller assemblies for contacting the corrugated tips, characterized in that, It also includes a heating roller, the roller surface of which is arranged adjacent to the roller surface of any set of corrugated roller assemblies. The gap formed by this arrangement creates a passive following effect of the heating roller under the friction of the paper.

2. A single-sided machine for producing bonding of corrugated tips according to claim 1, characterized in that, The heating rollers are provided in at least two sets, so that the roller surface of the corrugated roller assembly always has a contact area that allows the paper to make full contact during rotation.

3. A single-sided machine for producing bonding of corrugated tips according to claim 2, characterized in that, The heating roller has a steam channel inside, through which steam is supplied.

4. A single-sided machine for producing bonding of corrugated tips according to claim 1, characterized in that, The corrugated roll assembly includes corrugated rolls, and the corrugated rolls in at least two corrugated roll assemblies are driven by the same motor using a drive gear, and the ends of the corrugated rolls have driven gears that mesh with the drive gear.

5. A single-sided machine for producing bonding of corrugated tips according to claim 1, characterized in that, It also includes a wrapping angle adjustment mechanism and a heating cylinder. The wrapping angle adjustment mechanism includes a wrapping angle roller, a drive motor, a transmission component, and a rotating component. There are at least two sets of wrapping angle rollers. The roller surfaces of the wrapping angle roller, the heating cylinder, and the heating roller are corresponding to each other. The wrapping angle roller is set on the rotating component. The drive motor drives the rotating component to rotate through the transmission component, so that the wrapping angle roller rotates along the edge of the heating cylinder roller surface.

6. A papermaking method applied to a single-facer for producing corrugated tips bonded together as described in claim 1, characterized in that, Includes the following steps: S1, the first core paper and the second core paper are respectively fed in. The first core paper is squeezed by the first pressure roller and the first corrugated roller to form a corrugated shape. After the first core paper passes through the first glue roller, the glue on the first glue roller sticks to the crest of the first core paper. At the same time, the second core paper is squeezed by the second pressure roller and the second corrugated roller to form a corrugated shape. The first corrugated roller and the second corrugated roller are in rigid contact. The crest of the first core paper with glue comes into contact with the crest of the second core paper. S2, driven by the corrugated roller, the other side of the first core paper comes into contact with the glue on the second glue roller and comes to the area in contact with the face paper. Under the action of the heating roller, the face paper is brought closer to the core paper in a relatively light pressure. After passing through all the heating rollers, the first core paper, the second core paper and the face paper are completely bonded and fixed.

7. A production line for producing corrugated cardboard, the production line comprising a heating cylinder, a paper rack, a double-facer, a splicer, a gluing machine, an ear-cutting machine, a slitting machine, a cross-cutting machine, and a stacker, characterized in that, It also includes a single-facer as described in any one of claims 1-5, a paper feeder for feeding paper into the single-facer, a gluer for providing glue to the face paper, a double-facer for pressing the face paper and paper into corrugated board, a slitting machine and a cross-cutting machine for slitting the corrugated board into multiple specified patterns, and a stacking machine for stacking the slitting corrugated board.

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