A double-blade creasing knife and cutting machine for paper

Abstract

The application discloses a double-blade creasing knife for paper creasing and a cutting machine, and relates to the technical field of card paper production. The double-blade creasing knife for paper creasing comprises a cutter and two knife edges, the two knife edges are arranged on the cutter, and the two knife edges are distributed in parallel and at intervals. The double-blade creasing knife for paper creasing can form two creases when creasing paper, effectively reduces the crease position burst phenomenon, and improves the folding appearance quality compared with ordinary single-line creasing folding.

Description

Technical Field

[0001] This application relates to the field of paperboard production technology, and in particular to a double-edged creasing knife and a cutting machine for paper creasing. Background Technology

[0002] Creasing is a technique that uses tools to apply pressure to the surface of paper materials to change their shape or properties. In the packaging industry, it is mainly used to create specific indentations on the paper surface, improving the quality of the finished packaging. Creasing creates a raised or recessed effect on the surface of printed materials, enhancing both the aesthetics and functionality of the product.

[0003] In existing technology, after the creasing knife creasing the paper, during the paper folding process, the outer edge surface of the paper is subjected to tension, while the inner raised surface of the paper is subjected to pressure. When the tension is too great, the outer arc is prone to cracking during folding; due to the paper accumulation during folding, the outer edge is offset at an angle during folding. That is, when creasing the paper surface, the stress is concentrated at the creasing position due to the greater force. When the pressure is too great and a large angle needs to be turned during folding, the creasing position is prone to bursting, the crease line is offset, and the product quality is reduced. Utility Model Content

[0004] The purpose of this application is to provide a double-edged creasing knife and a cutting machine for paper creasing, which can improve the creasing effect and thus improve product quality.

[0005] To achieve the above objectives, this application provides a double-edged creasing knife for paper creasing, comprising: a cutting tool and a cutting edge;

[0006] The blade has two blades, both of which are located on the cutting tool and are distributed in parallel with a gap between them. The distance between the two blades is positively correlated with the thickness of the paper.

[0007] In some embodiments, the blade has a V-shaped cross-section, and the two blade edges have an included angle.

[0008] In some embodiments, the included angle between the two blades ranges from 58 degrees to 62 degrees.

[0009] In some embodiments, the cutting edge of the blade has an arc-shaped structure.

[0010] A cutting machine includes a creasing knife, said creasing knife being a double-edged creasing knife for paper creasing as described in any of the preceding claims.

[0011] In some embodiments, the cutting tool has a disc-shaped structure, and the two cutting edges extend in a ring along the circumference of the cutting tool along the edge of the sidewall of the disc-shaped structure.

[0012] In some embodiments, the cutting tool has a mating hole for mounting a connecting seat, the connecting seat being used to assemble the cutting tool onto a cutting machine.

[0013] In some embodiments, the connecting seat is rotatably and detachably connected to the cutting tool.

[0014] In some embodiments, a pad is also provided for supporting the paper.

[0015] In some embodiments, the pad has a hardness greater than 75 HSA and is elastic. Compared to the background technology described above, the double-edged creasing knife for paper creasing provided in this application includes a cutting tool and two blades. Both blades are disposed on the cutting tool and are distributed parallel to each other. The distance between the two blades is positively correlated with the paper thickness. During creasing, the blades contact the paper. By moving the cutting tool and applying pressure, two parallel creases are formed on the paper surface. When the paper on both sides of the crease line rotates 45 degrees around the adjacent crease line as a rotation axis, a 90-degree fold can be achieved; when the paper rotates 90 degrees around the adjacent crease line as a rotation axis, a 180-degree fold can be achieved. This process avoids excessively large folding angles for individual creases, thereby preventing excessive paper pressure and preventing paper bursting. Since the blade spacing is equal to the distance between the two crease lines, the distance between the two crease lines differs when folding paper of different thicknesses. Thicker paper has a larger distance between the two crease lines when folding; therefore, the distance between the two blades is positively correlated with the paper thickness. The double-edged creasing knife of this application for paper creasing is designed with two blades, which can form two creasing lines when creasing paper. Compared with ordinary single-line creasing folding, it effectively reduces the cracking phenomenon at the creasing area and improves the appearance quality of the fold. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a double-edged creasing knife for paper creasing according to an embodiment of this application.

[0018] Figure 2 This is a cross-sectional view of a double-edged creasing knife for paper creasing according to an embodiment of this application.

[0019] Figure 3 This is a cross-sectional view of the blade portion of a double-edged creasing knife for paper creasing according to an embodiment of this application.

[0020] Figure 4 This is a schematic diagram of the operation of a double-edged creasing knife for paper creasing according to an embodiment of this application.

[0021] Figure 5 This is a front view of the paper structure after creasing using a double-edged creasing knife for paper creasing according to an embodiment of this application.

[0022] Figure 6 This is a top view of the paper structure after creasing using a double-edged creasing knife for paper creasing according to an embodiment of this application.

[0023] Figure 7 This is a diagram showing the paper folded at 90 degrees after being crimped by a double-edged crimping knife used for paper crimping according to an embodiment of the application.

[0024] Figure 8 This is a diagram showing the state of the paper after being creased by a double-edged creaser for paper creasing according to an embodiment of the application, with the paper folded 180 degrees.

[0025] in:

[0026] 100. Cutting machine; 1. Knife; 11. Blade; 2. Connecting seat; 3. Pad; 200. Paper; 201. Creasing line. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] It should be noted that the directional terms such as "upper end," "lower end," "left side," and "right side" mentioned below are defined based on the accompanying drawings in the instruction manual.

[0030] like Figures 1 to 2 As shown, the double-edged creasing knife for paper creasing provided in this application embodiment includes a cutting tool 1 and two cutting edges 11. The two cutting edges 11 are both provided on the cutting tool 1 and are distributed in parallel and spaced apart. The distance between the cutting edges of the cutting edges 11 is positively correlated with the thickness of the paper 200.

[0031] like Figures 4 to 8As shown, during the creasing process, the blade 11 contacts the paper 200. By moving the blade 1 and applying pressure to it, two parallel creasing lines 201 are formed on the surface of the paper 200. The paper 200 can be folded 90 degrees by rotating 45 degrees around the adjacent creasing lines 201 as the axis of rotation, and 180 degrees by rotating 90 degrees around the adjacent creasing lines 201 as the axis of rotation. During the folding process, the folding angle of a single crease should be avoided to prevent excessive pressure on the paper 200 and to prevent the paper 200 from bursting.

[0032] Since the distance between the blades is equal to the distance between the two crease lines, the distance between the two crease lines is different when the paper is folded, and the greater the thickness of the paper, the greater the distance between the two crease lines.

[0033] Preferably, the blade spacing of the blade 11 corresponds to the thickness of the paper 200 mm.

[0034] L=t+C

[0035] Where: L—the distance between the cutting edges of blade 11

[0036] T—Paper thickness 200

[0037] C = 1 millimeter.

[0038] Depending on the thickness of the paper, the spacing between the blades 11 also needs to be adjusted accordingly to avoid interference between the two crease lines 201 during folding.

[0039] The double-edged creasing knife of this application, by designing double blades 11, can form two creasing lines 201 when creasing paper 200, effectively reducing the phenomenon of cracking at the creasing part and crease deviation during folding, and improving the appearance quality of folding.

[0040] like Figure 2 and Figure 3 As shown, in some embodiments, the cross-section of the blade 11 is V-shaped, and the cutting edge of the blade 11 has an included angle.

[0041] It is understandable that pressure needs to be applied to the cutter 1 during the creasing process. The cutter 1 transmits the pressure to the blade 11. When the blade 11 moves relative to the paper 200, it will form a creasing line 201 on the paper 200. The V-shaped blade 11 can reduce the contact area between the blade 11 and the paper 200, increase the creasing depth, and thus improve the appearance when folded.

[0042] It is understood that in some other embodiments, the blade 11 may be configured with different shapes as needed.

[0043] Based on the above embodiment, the included angle between the two cutting edges 11 ranges from 58 degrees to 62 degrees.

[0044] Understandably, during the creasing process, the blade angle of the blade 11 affects the crease effect of the paper 200. If the blade angle is too large, the width of the creasing line 201 will increase, resulting in wider edges when the paper 200 is folded. If the blade angle is too small, the width of the creasing line 201 will decrease, leading to edge deformation and bending of the folding line after the paper 200 is folded, thus affecting the folding quality.

[0045] Preferably, when creasing paper 200 with a thickness of 0.3 mm, a blade angle of 60 degrees can achieve the optimal width of the creasing line 201.

[0046] In some embodiments, the cutting edge of the blade 11 has an arc-shaped structure.

[0047] Understandably, by using a rounded transition design at the blade edge of blade 11, it is possible to prevent the blade edge from tearing the paper 200 under excessive pressure.

[0048] Preferably, when indenting paper 200 with a thickness of 0.3 mm, the blade 11 has an arc-shaped structure with a radius of 0.2 mm.

[0049] like Figure 1 As shown, the cutting machine 100 provided in this application embodiment includes a creasing knife, which is a double-edged creasing knife for paper creasing in the above embodiment.

[0050] By mounting a creasing blade on a cutting machine 100, the cutting machine 100 can apply pressure to the creasing blade and control its movement relative to the paper 200, thus creasing the paper 200. Compared to traditional creasing methods, this application eliminates the need for specialized equipment or manual processing of the paper creasing lines 201. The paper 200 can be creasing simply by mounting the creasing blade on ordinary cutting equipment, resulting in a shorter processing cycle and lower manufacturing costs.

[0051] In some embodiments, the cutter 1 has a disc-shaped structure, with two cutting edges 11 extending circumferentially along the edge of the cutter 1.

[0052] Understandably, during the creasing operation, the edge of the blade 1 abuts against the paper 200, and the two blades 11 make point contact with the paper 200. The cutting machine 100 can control the blade 1 to move relative to the paper 200 on the horizontal plane as needed, thereby forming creasing lines 201 of different shapes. At the same time, during the creasing operation, the blade 1 and the paper 200 make rolling contact, which prevents the edge of the blade 1 from sliding relative to the paper 200, reduces the damage of the blade 1 to the paper surface, improves product quality, and also increases the service life of the blade.

[0053] Based on the above embodiments, the cutting tool 1 has a mating hole, which can be used to install the connecting seat 2. The connecting seat 2 is used to assemble the cutting tool 1 with the cutting machine 100.

[0054] Specifically, the mating hole is located at the center of the blade 1, and the connecting seat 2 is connected to the blade 1 through the mating hole. The two ends of the connecting seat 2 are respectively installed on the cutting machine 100. When creasing paper 200 of different thicknesses, the blade 1 can be removed and replaced with a creasing blade corresponding to the thickness of the paper 200.

[0055] Based on the above embodiments, the connecting seat 2 and the cutting tool 1 are detachably connected.

[0056] It is understandable that the connecting seat 2 is detachably and rotatably connected to the cutter 1 via a bearing. When disassembling the cutter 1, the connecting seat 2 is removed from the cutting machine 100, and then the cutter 1 is removed from the mounting seat 2, which can quickly remove the cutter 1. When installing the cutter 1, it is only necessary to assemble the bearing into the mating hole of the cutter 1 and then snap the bearing onto the mounting seat 2, which can quickly install the cutter 1.

[0057] In some embodiments, the cutter 100 is further provided with a pad 3 for supporting the paper 200.

[0058] The pad 3 is set to protect the paper 200 and ensure that the paper 200 can be deformed reasonably when creasing.

[0059] Based on the above embodiments, the pad 3 has a hardness greater than 75HSA and is elastic.

[0060] Understandably, the pad can be a continuous ring strip or sheet material. The appropriate material should be selected according to the working conditions. If the pad 3 is too hard, it will easily crush the paper; if the pad 3 is too soft, the indentation area will deform more, and the edges will not be straight after folding, which will affect the appearance quality of the product.

[0061] Preferably, the pad 3 can be a PU material conveyor belt with a hardness greater than 75HSA.

[0062] The workflow of the cutting machine 100 performing the creasing operation on the paper 200 provided in this embodiment is as follows:

[0063] Select a blade 1 with a corresponding blade spacing based on the thickness of the paper 200. Install the blade 1 on the connecting seat 2, and then install the connecting seat 2 on the cutting machine 100. Place a pad on the worktable of the cutting machine 100 and lay the paper 200 to be creasing flat on the pad. Set the starting position of the creasing line 201 using the auxiliary equipment on the cutting machine 100. Then, the control system of the cutting machine 100 causes the blade 11 of the blade 1 to abut against the paper 200 and applies corresponding pressure to the blade 1. The cutting machine 100 controls the movement of the blade 1. During the movement of the blade 1, the blade 11 rolls with the paper 200, forming two parallel creasing lines 201 on the paper 200 as the blade 1 moves. Specifically, when creasing cardboard with a thickness of 0.5 mm, a blade 1 with a blade spacing of 1.5 mm and a blade angle of 60 degrees is selected. The blade 1 is fixed to the connecting seat 2 by a bearing, and then the connecting seat 2 is installed on the cutting machine 100. Place the base plate 3 flat on the workbench, and lay a 0.5 mm thick cardstock flat on the base plate 3. Then drive the cutting machine 100 to move the blade 1 downwards, so that the bottom edge of the blade 1 abuts against the cardstock. Adjust the crease depth so that the blade 11 presses the cardstock downwards, causing the cardstock to deform and the pressed area to indent downwards. The base plate 3 deforms accordingly. Drive the cutting machine 100 to move the blade 1 in a plane. During the rolling process relative to the cardstock, the blade 1 will form two crease lines 201. The shape of the crease lines 201 is consistent with the trajectory set in the system of the cutting machine 100, and the distance between the two crease lines 201 remains constant. Figure 5 and Figure 6 As shown, when the cutting machine 100 moves along a straight line, the two indentation lines 201 are two parallel straight lines.

[0064] When folding the paper 200 along the crease lines at a 90-degree angle, it is only necessary to fold the cardboard on both sides of the two crease lines 201 at a 45-degree angle along the adjacent crease lines 201 to achieve a 90-degree fold. The folded cardboard is as follows: Figure 7 As shown. When folding the paper 200 along the crease line 180 degrees, it is only necessary to fold the cardboard on both sides of the two crease lines 201 90 degrees along the adjacent crease line 201 to achieve the 180-degree fold of the cardboard.

[0065] In summary, the double-edged creasing knife for paper creasing of this application, by designing double blades 11, can form two creasing lines 201 when creasing paper 200. Compared with ordinary single-line creasing folding, it effectively reduces the cracking phenomenon at the creasing part and improves the appearance quality of the fold.

[0066] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0067] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0068] The foregoing has provided a detailed description of the double-edged creasing knife for paper creasing provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are merely for the purpose of helping to understand the solution and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A double-edged creasing knife for paper creasing, characterized in that, include: Cutting tool (1); Blade (11), both blades (11) are provided on the tool (1), and the two blades (11) are distributed in parallel and spaced apart. The distance between the two blades (11) is positively correlated with the thickness of the paper.

2. The double-edged creasing knife for paper creasing according to claim 1, characterized in that, The blade (11) has a V-shaped cross-section, and the two blades (11) have an included angle.

3. The double-edged creasing knife for paper creasing according to claim 2, characterized in that, The included angle between the two blades (11) ranges from 58 degrees to 62 degrees.

4. The double-edged creasing knife for paper creasing according to claim 1, characterized in that, The cutting edge of the blade (11) is an arc-shaped structure.

5. A cutting machine, comprising a creasing blade, characterized in that, The embossing knife is a double-edged embossing knife for paper embossing as described in any one of claims 1-4.

6. The cutting machine according to claim 5, characterized in that, The cutting tool (1) has a disc-shaped structure, and the two cutting edges (11) extend along the circumference of the cutting tool (1) at the edge of the disc-shaped structure.

7. The cutting machine according to claim 6, characterized in that, The cutting tool (1) has a mating hole for mounting a connecting seat (2), which is used to assemble the cutting tool (1) onto the cutting machine (100).

8. The cutting machine according to claim 7, characterized in that, The connecting seat (2) is detachably connected to the cutting tool (1).

9. The cutting machine according to claim 8, characterized in that, A pad (3) is also provided, which is used to support the paper (200).

10. The cutting machine according to claim 9, characterized in that, The pad (3) has a hardness greater than 75HSA and is elastic.

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