Sheet slitting device and die-cutting machine
By designing a sheet slitting device for the sponge bonding process, the automatic bonding and slitting of the sponge sheet is achieved by using press rollers and blades, the problem of high efficiency and low manual operation cost in the prior art is solved, and the production efficiency and product quality are improved.
Patent Information
- Application Number
- CN202421564701.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-07-04
AI Technical Summary
The existing sponge bonding process relies on manual operation, resulting in high cost and low efficiency. Manual slitting can easily damage the sponge or double-sided adhesive, and the quality is unstable.
A sheet slitting device is designed, including a base, a fitting assembly, a traction assembly and a slitting assembly. The bonding assembly presses the first substrate and the second substrate to form a sheet by two pressing rollers arranged oppositely, and the slitting assembly cuts the sheet into a preset width using a plurality of blades. The traction assembly realizes automatic winding and conveying of the sheet through a feeding roller and a traction motor.
Automatic bonding and slitting of sponge sheets is realized, manual operation is reduced, cost is reduced, production efficiency is improved, and product stability and quality is improved.
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Figure CN222932963U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of die-cutting, and particularly to a sheet cutting device and a die-cutting machine. Background Art
[0002] In the die-cutting industry, sponge bonding products are widely used. However, in the related art, the sponge sheet bonding process still adopts manual operation. The sponge is laid flat on the platform manually, then the double-sided tape is pulled open and covered on the sponge, and a roller is used to press it. After bonding, the excess sponge is cut off with a craft knife, and after completion, the roller is used to wind it up neatly. There are problems of high labor cost and low efficiency. Summary of the Invention
[0003] Based on this, in view of the problems of high labor cost and low efficiency in the sponge bonding process in the related art, it is necessary to provide a sheet cutting device and a die-cutting machine.
[0004] To achieve the above object, the technical solution adopted in the present application is as follows:
[0005] In a first aspect, an embodiment of the present application provides a sheet cutting device. The sheet includes a first substrate and a second substrate. The sheet cutting device includes:
[0006] A machine base;
[0007] A bonding assembly, which is arranged on the machine base and includes two relatively arranged pressure rollers. A pressing channel is provided between the two pressure rollers, and the two pressure rollers are used to press the first substrate and the second substrate passing through the pressing channel to form the sheet;
[0008] A cutting assembly, which is arranged on the machine base and is located downstream of the bonding assembly. The cutting assembly includes a plurality of blades, and the blades are arranged at intervals and are used to cut the sheet into a preset width;
[0009] A traction assembly, which is arranged on the machine base and is located downstream of the cutting assembly. The traction assembly includes at least one winding roller and a traction motor. One end of the winding roller is connected to the output shaft of the traction motor, and the winding roller is used to wind up the cut sheet and synchronously traction the cut sheet to move forward.
[0010] In one embodiment of the first aspect, the bonding assembly further includes a lifting cylinder, and the telescopic end of the lifting cylinder is connected to one of the pressure rollers and is used to adjust the distance between the two pressure rollers.
[0011] In one embodiment of the first aspect, the traction assembly further includes at least one support frame mounted on the machine base, and one end of each material receiving roller away from the traction motor is respectively rotatably mounted on a corresponding support frame.
[0012] In one embodiment of the first aspect, the traction assembly further includes a plurality of traction rollers, and the traction rollers are sequentially rotatably arranged between the laminating assembly and the material receiving roller, and the sheet material sequentially winds around the traction rollers.
[0013] In one embodiment of the first aspect, the slitting assembly further includes a cutter roller, the cutter roller is provided with a plurality of cutter grooves, and each blade is correspondingly arranged with a cutter groove, and the sheet material passes through between the blade and the cutter roller.
[0014] In one embodiment of the first aspect, the slitting assembly further includes a mounting rod, an adjusting gear and an adjusting rod. The mounting rod is rotatably mounted in the machine base, the adjusting gear is sleeved on the mounting rod, one end of the adjusting rod is provided with tooth threads and meshes with the adjusting gear, one end of the blade is mounted on the mounting rod, and the end of the adjusting rod away from the adjusting gear extends outwards from the machine base and is provided with a rotating wheel, so as to drive the adjusting gear and the blade to rotate by rotating the rotating wheel, and adjust the distance between the blade and the cutter roller.
[0015] In one embodiment of the first aspect, the sheet material slitting device further includes a collecting assembly, and the collecting assembly is mounted on one side of the material receiving roller and is used for collecting waste chips generated by slitting.
[0016] In one embodiment of the first aspect, the sheet material slitting device further includes a conveying assembly, the conveying assembly is arranged on the side of the laminating assembly away from the traction assembly, the conveying assembly is provided with a conveying platform, and the conveying assembly is used for conveying the first base material laid on the conveying platform to the lamination channel.
[0017] In one embodiment of the first aspect, the sheet material slitting device further includes a feeding assembly, the feeding assembly includes at least one feeding shaft, and the feeding shaft is arranged above the gravity direction of the pressure roller and is used for placing the second base material.
[0018] In a second aspect, an embodiment of the present application further provides a die-cutting machine, including the sheet material slitting device in any of the above embodiments.
[0019] Compared with the related art, the beneficial effects of the present application are as follows: The present application provides a sheet cutting device and a die-cutting machine, which can be used in the cutting production process of sheet products. The sheet cutting device includes a machine base, a laminating assembly, a traction assembly, and a cutting assembly. Among them, the laminating assembly includes two pressure rollers arranged oppositely, and the two pressure rollers are used to laminate a first substrate and a second substrate into a sheet. The traction assembly includes a winding roller and a traction motor for traction and winding of the sheet. The cutting assembly includes a plurality of blades for cutting the sheet into a preset width. In this way, during the operation process, after the ends of the first substrate and the second substrate are laminated by the pressure rollers, they are fixed on the winding roller. At the same time, a plurality of blades arranged between the laminating assembly and the traction assembly cut the sheet into a preset width. The winding roller rotates under the action of the driving motor, thereby winding and traction the sheet, realizing automatic lamination and cutting of the sheet, reducing labor costs, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0021] Figure 1 Structural schematic diagram of the sheet cutting device in some embodiments of the present application;
[0022] Figure 2 Structural schematic diagram of the laminating assembly in some embodiments of the present application;
[0023] Figure 3 Structural schematic diagram of the traction assembly in some embodiments of the present application;
[0024] Figure 4 Structural schematic diagram of the cutting assembly in some embodiments of the present application;
[0025] Figure 5 Structural schematic diagram of the conveying assembly in some embodiments of the present application;
[0026] Figure 6 Structural schematic diagram of the unwinding assembly in some embodiments of the present application.
[0027] Description of the reference numerals:
[0028] 100. Sheet cutting device; 110. Laminating assembly; 111. Pressing roller; 112. Lifting cylinder; 113. Pressing channel; 120. Traction assembly; 121. Take-up roller; 122. Support frame; 123. Traction roller; 130. Cutting assembly; 131. Blade; 132. Knife roller; 133. Mounting rod; 134. Adjusting gear; 135. Adjusting rod; 140. Collection assembly; 150. Conveying assembly; 151. Conveying platform; 160. Unwinding assembly; 161. Unwinding shaft; 170. Machine base;
[0029] 200. Sheet; 210. First substrate; 220. Second substrate. Detailed implementation manner
[0030] To make the above objects, features, and advantages of the present application more apparent and understandable, the following detailed description of the specific implementation manner of the present application is provided in conjunction with the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.
[0031] In the description of the present application, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application.
[0032] In addition, if there are terms such as "and / or", "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after. If there are terms such as "first" and "second", these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if there are terms such as "multiple", the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically defined.
[0033] In this application, unless otherwise clearly specified and defined, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0034] In this application, unless otherwise clearly specified and defined, if there is a description such as a first feature being "on" or "under" a second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal level than the second feature.
[0035] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.
[0036] In the related art, the sponge laminating process uses manual operation. The manual lamination speed is about 40M / hour, with low efficiency. Moreover, after lamination, it needs to be cut with a utility knife, which is likely to damage the sponge or double-sided tape, resulting in unstable quality, and the average defective rate can reach 8%.
[0037] Therefore, this application provides a sheet cutting device 100, which can be used for the slitting and winding operations of various sheets 200, and is specifically used for the automatic sponge laminating process. The sheet cutting device 100 provided by this application can realize the automatic laminating and cutting of the sheet 200, reduce labor costs and improve production efficiency.
[0038] Refer to Figure 1 As shown, the sheet 200 includes a first substrate 210 and a second substrate 220, and the sheet cutting device 100 includes a machine base 170, a laminating assembly 110, a traction assembly 120 and a cutting assembly 130.
[0039] Refer to together Figure 2 、 Figure 3 and Figure 4 As shown, the laminating assembly 110 is disposed on the machine base 170 and includes two pressure rollers 111 arranged oppositely. A lamination channel 113 is provided between the two pressure rollers 111. The two pressure rollers 111 are used to laminate a first substrate 210 and a second substrate 220 passing through the lamination channel 113 to form a sheet 200. The slitting assembly 130 is disposed on the machine base 170 and is located downstream of the laminating assembly 110. The slitting assembly 130 includes a plurality of blades 131. The blades 131 are arranged at intervals and are used to slit the sheet 200 into a preset width. The traction assembly is disposed on the machine base 170 and is located downstream of the slitting assembly 130. The traction assembly 120 includes at least one winding roller 121 and a traction motor. One end of the winding roller 121 is connected to the output shaft of the traction motor. The winding roller 121 is used to wind the slit sheet 200 and synchronously traction the slit sheet 200 to travel.
[0040] For ease of understanding, the sheet 200 in this application is exemplified by a sponge lamination product. Correspondingly, the first substrate 210 can be a sponge sheet, and the second substrate 220 can be a double-sided adhesive layer.
[0041] Exemplarily, the machine base 170 can be a metal welded housing. The laminating assembly 110, the traction assembly 120, and the slitting assembly 130 are all installed on the machine base 170. The first substrate 210 and the second substrate 220 pass through the lamination channel 113 simultaneously. Under the extrusion of the two pressure rollers 111, they are bonded together to form the required sponge lamination sheet 200. After the sheet 200 passes through the slitting assembly 130, it is connected to the traction assembly 120. Driven by the traction assembly 120, it is conveyed forward and wound on the traction assembly 120.
[0042] The number of winding rollers 121 can be one, two, three, etc., and can be specifically set according to actual needs to improve the winding ability of the sheet 200. In this embodiment, the number of winding rollers 121 can be two, and the two winding rollers 121 are distributed oppositely up and down along the gravity direction. The two winding rollers 121 can be connected to the same traction motor through a transmission member, or each winding roller 121 is respectively connected to a traction motor. The transmission member can be a gear, a chain, a belt, etc. One end of the sheet 200 is fixed on the winding roller 121. Driven by the traction motor, the winding roller 121 rotates, thereby traction the sheet 200 to be conveyed forward, and at the same time, following the rotation of the winding roller 121, it is wound on the winding roller 121.
[0043] The slitting assembly 130 includes a plurality of circular blades 131. The number of blades 131 can be two, three, four, etc., and can be specifically set according to the width of the sheet 200 required. The blades 131 are arranged between the pressure roller 111 and the traction roller 123, so that before the sheet 200 is wound by the take-up roller 121, it is slit into corresponding widths by the blades 131, realizing the automatic laminating and slitting of the sheet 200, and improving the production efficiency. Moreover, compared with manual slitting, it will not damage the base material, and the quality stability is improved.
[0044] Refer to Figure 1 and Figure 2 As shown, in some embodiments, the laminating assembly 110 further includes a lifting cylinder 112. The telescopic end of the lifting cylinder 112 is connected to a pressure roller 111, and the distance between the two pressure rollers 111 is adjusted.
[0045] Exemplarily, the lifting cylinder 112 is installed above the machine base 170, and the telescopic end can move relative to the machine base 170 along the gravity direction to drive one of the pressure rollers 111 connected thereto to move up and down, thereby adjusting the distance between the two pressure rollers 111 and adjusting the pressing force of the pressure rollers 111 to meet the production of sheets 200 with different thicknesses.
[0046] In this embodiment, the lifting cylinder 112 can be one of workpieces with telescopic functions such as a pneumatic cylinder, a hydraulic cylinder, and a linear motor.
[0047] Refer to Figure 1 and Figure 3 As shown, in some embodiments, the traction assembly 120 further includes at least one support frame 122 installed on the machine base 170. One end of each take-up roller 121 away from the traction motor is respectively rotatably installed on a corresponding support frame 122.
[0048] Exemplarily, each take-up roller 121 is correspondingly provided with a support frame 122 to install the take-up roller 121 on the machine base 170 through the support frame 122. One end of the support frame 122 is fixed to the inner side of the machine base 170, and the other end extends to the outside of the machine base 170 to provide an installation space for the take-up roller 121.
[0049] Refer to Figure 1 and Figure 3 As shown, in some embodiments, the traction assembly 120 further includes a plurality of traction rollers 123. The traction rollers 123 are sequentially rotatably arranged between the laminating assembly 110 and the take-up roller 121, and the sheet 200 is sequentially wound around the traction rollers 123.
[0050] Exemplarily, the number of the traction rollers 123 can be two, three, four, five, etc., and can be specifically set according to the conveying distance of the sheet 200. Each traction roller 123 is sequentially and rotatably installed inside the machine base 170. After the sheet 200 is pressed by the pressing roller 111, it bypasses each traction roller 123 in sequence. Here, the traction roller 123 can function similar to a tension pulley. While guiding the conveying direction of the sheet 200, it restricts the tension degree of the sheet 200 to straighten the sheet 200, facilitating the cutting by the blade 131.
[0051] Refer to Figure 1 and Figure 4 As shown, in some embodiments, the slitting assembly 130 further includes a cutter roller 132. A plurality of cutter grooves are formed in the cutter roller 132. Each blade 131 is correspondingly arranged with a cutter groove. The sheet 200 is threaded between the blade 131 and the cutter roller 132.
[0052] Exemplarily, after being pressed, the sheet 200 passes through the surface of the cutter roller 132 and closely adheres to the cutter roller 132 under the restriction of the traction roller 123. The cutter groove can be understood as a circular groove provided on the circumferential side of the cutter roller 132. The spacing of the cutter grooves is correspondingly arranged with the blade 131 so that when the blade 131 cuts the sheet 200, the blade 131 can be inserted into the cutter groove. During the cutting process, the initial position of the blade 131 is constant. During the conveying process of the sheet 200, both sides of the sheet 200 are respectively in contact with the cutter roller 132 and the blade 131. As the sheet 200 moves, the circular blade 131 rotates and cuts the sheet 200 into the required width.
[0053] Refer to Figure 1 and Figure 4 As shown, in some embodiments, the slitting assembly 130 further includes a mounting rod 133, an adjusting gear 134, and an adjusting rod 135. The mounting rod 133 is rotatably installed inside the machine base 170. The adjusting gear 134 is sleeved on the mounting rod 133. One end of the adjusting rod 135 is provided with teeth and meshes with the adjusting gear 134 installed on the mounting rod 133. One end of the blade 131 is installed on the mounting rod 133. The end of the adjusting rod 135 away from the adjusting gear 134 extends outward from the machine base 170 and is provided with a rotating wheel, so as to drive the adjusting gear 134 and the blade 131 to rotate by rotating the rotating wheel, adjust the spacing between the blade 131 and the cutter roller 132, and adjust the cutting force.
[0054] Refer to Figure 1 and Figure 3 As shown, in some embodiments, the sheet slitting device 100 further includes a collecting assembly 140. The collecting assembly 140 is installed on one side of the take-up roller 121 and is used for collecting the waste chips generated by slitting.
[0055] Exemplarily, during the slitting process of the sheet 200, some waste chips will inevitably be generated. The collection assembly 140 is installed at one end of the machine base 170 close to the winding roller 121 to recycle the waste chips.
[0056] In one embodiment, the collection assembly 140 can be a blowing fan to blow the waste chips out of the interior of the machine base 170. Additionally, in another embodiment, the collection assembly 140 can also be a suction fan to adsorb the waste chips onto a fixed recycling bin.
[0057] Referring to Figure 1 and Figure 5 As shown, in some embodiments, the sheet slitting device 100 further includes a conveying assembly 150. The conveying assembly 150 is disposed on a side of the laminating assembly 110 away from the traction assembly 120. The conveying assembly 150 is provided with a conveying platform 151, and the conveying assembly 150 is used to convey the first base material 210 laid on the conveying platform 151 to the lamination channel 113.
[0058] Exemplarily, the conveying assembly 150 can be a conveyor belt or a conveying roller structure, and its top is a planar structure to facilitate the conveyance of the first base material 210 and convey the first base material 210 to the lamination channel 113.
[0059] Referring to Figure 1 and Figure 6 As shown, in some embodiments, the sheet slitting device 100 further includes a feeding assembly 160. The feeding assembly 160 includes at least one feeding shaft 161. The feeding shaft 161 is disposed above the pressing roller 111 in the direction of gravity and is used to place the second base material 220.
[0060] Exemplarily, the number of feeding shafts 161 can be one, two, etc., which can be specifically set according to actual requirements. The feeding shaft 161 is installed on the top of the machine base 170. The second base material 220 is installed on the feeding shaft 161 in a roll shape, and the second base material 220 is conveyed to the lamination channel 113 through a guiding wheel.
[0061] An embodiment of the present application further provides a die-cutting machine, including the sheet slitting device 100 in any of the above embodiments.
[0062] It can be understood that the die-cutting machine provided by the present application is not limited to the sponge laminating product process in the above embodiments, and can also be applied to the production process of other sheets 200, such as the processes of sponge glue, release film, etc., which are not specifically limited herein.
[0063] This embodiment has the sheet slitting device 100 in any of the above embodiments. Therefore, it has all the beneficial effects of the sheet slitting device 100 in any of the above embodiments, which will not be elaborated herein one by one.
[0064] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the various technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.
[0065] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.
Claims
1. A sheet material slitting device, wherein the sheet material comprises a first substrate and a second substrate, characterized in that: The sheet slitting device comprises: Machine base; A laminating assembly, the laminating assembly is arranged on the machine base and comprises two pressing rollers arranged opposite to each other, a pressing channel is arranged between the two pressing rollers, and the two pressing rollers are used to press the first substrate and the second substrate passing through the pressing channel to form the sheet; A slitting assembly, which is disposed on the machine base and downstream of the laminating assembly, and comprises a plurality of blades, each of which is disposed at intervals and is used to slit the sheet into a preset width; A traction assembly is arranged on the machine base and located downstream of the slitting assembly. The traction assembly includes at least one receiving roller and a traction motor. One end of the receiving roller is connected to the output shaft of the traction motor. The receiving roller is used to reel up the slit sheets and synchronously pull the slit sheets forward.
2. The sheet slitting device according to claim 1, characterized in that: The laminating assembly further comprises a lifting cylinder, the telescopic end of which is connected to one of the pressing rollers and adjusts the distance between the two pressing rollers.
3. The sheet slitting device according to claim 1, characterized in that: The traction assembly also includes at least one support frame installed on the machine base, and one end of each of the receiving rollers away from the traction motor is rotatably installed on a corresponding one of the support frames.
4. The sheet slitting device according to claim 1, characterized in that: The traction assembly further comprises a plurality of traction rollers, each of which is rotatably arranged between the laminating assembly and the receiving roller in sequence, and the sheet material is sequentially wound around each of the traction rollers.
5. The sheet slitting device according to claim 1, characterized in that: The slitting assembly further comprises a knife roller, the knife roller is provided with a plurality of knife grooves, each of the blades is arranged corresponding to one of the knife grooves, and the sheet material is passed between the blades and the knife roller.
6. The sheet slitting device according to claim 5, characterized in that: The slitting assembly also includes a mounting rod, an adjusting gear and an adjusting rod. The mounting rod is rotatably installed in the machine base, the adjusting gear is sleeved on the mounting rod, one end of the adjusting rod is provided with a tooth pattern and meshes with the adjusting gear, one end of the blade is installed on the mounting rod, the end of the adjusting rod away from the adjusting gear extends to the outside of the machine base, and is provided with a rotating wheel, so that the adjusting gear and the blade can be driven to rotate by rotating the rotating wheel, thereby adjusting the distance between the blade and the knife roller.
7. The sheet slitting device according to any one of claims 1 to 6, characterized in that: The sheet slitting device also includes a collecting assembly, which is installed on one side of the receiving roller and is used to collect waste scraps generated by slitting.
8. The sheet slitting device according to any one of claims 1 to 6, characterized in that: The sheet slitting device also includes a conveying component, which is arranged on a side of the laminating component away from the traction component. The conveying component is provided with a conveying platform, and the conveying component is used to convey the first substrate laid on the conveying platform to the lamination channel.
9. The sheet slitting device according to claim 8, characterized in that: The sheet material slitting device further comprises a material discharging assembly, wherein the material discharging assembly comprises at least one material discharging shaft, and the material discharging shaft is arranged above the gravity direction of the pressing roller and is used for placing the second substrate.
10. A die-cutting machine, characterized in that: A sheet slitting device comprising the sheet slitting device according to any one of claims 1 to 9.