A slotting and corner cutting device

Abstract

The present invention relates to a grooving and angle cutting device, comprising a cutter disc, at least one group of cutting tools, and a cutter seat arranged in a one-to-one correspondence with the cutter disc; the cutting tools comprise a cutting knife and at least one group of Uli knives, the Uli knives and the cutting knives are separately arranged and connected and fixed to the cutter disc; the cutting knife is located at any side end of the Uli knives, or at any end of a channel between two adjacent groups of Uli knives; the cutter seat is provided with a bottom knife connected and fixed thereto, and the surface of the bottom knife is provided with knife grooves corresponding to the Uli knives in a one-to-one correspondence; the structural design of the present invention is reasonable, and by adopting a grooving and angle cutting structure with clearance fit, the use of the Uli knives can achieve zero wear, saving customers a large amount of consumables costs; at the same time, the height of the separately arranged cutting knife is adjustable, and can be adjusted according to its wear condition to ensure its use effect.

Description

Technical Field

[0001] The invention relates to the technical field of corrugated board processing, in particular to a grooving and corner cutting device. Background Art

[0002] With the continuous development of social economy and the continuous popularity of e-commerce industry, my country's packaging industry has developed rapidly. The production process of packaging cartons is that the corrugated cardboard production line produces corrugated cardboard, and at the same time, the folding longitudinal lines that determine the height of the carton are rolled out on the corrugated cardboard. Then, the cardboard is printed, pressed and slotted by the ink printing slotting machine, and finally, the finished carton is made by the nailing machine or the gluing machine according to different requirements.

[0003] When slotting corrugated cardboard, a long slot and a tongue for nailing or gluing boxes need to be cut out of a printed cardboard. There are two existing slotting processes. One is to use the upper and lower slotting knives to work closely together to cut the slot. The disadvantage of this process is that the upper and lower knives are closely matched for slotting, and the knives wear out quickly, and the knives need to be changed frequently. After a period of time, the slots will be worn out, and there will be many burrs on the slots. In addition, the speed of the slotting knife tip is greater than the speed of the cardboard, resulting in the phenomenon of corner picking at the slots, and the molding is not beautiful. The other process uses a U-knife and a U-glue pad to cut the slots. This process will not cause the slot corner picking phenomenon, but the disadvantage is that in order to ensure the cutting of the cardboard, the U-knife needs to be forced to cut close to the U-glue pad. This process causes great loss of the U-knife and the U-glue pad. Customers need to replace the U-knife and the U-glue pad more frequently, which increases more costs. Summary of the invention

[0004] In order to solve the deficiencies in the prior art, the present invention provides a grooving and corner cutting device for ensuring the processing effect of corrugated paperboard and reducing the processing cost.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A slotting and corner cutting device, characterized in that it comprises a cutter disc and at least one set of cutters;

[0007] The cutting tool comprises a cutting knife and at least one set of U-knives, the U-knives and the cutting knife are separately arranged and connected and fixed to the cutting disc;

[0008] The cutting knife is located at any side end of the U-knife, or at any end of the channel between two adjacent groups of U-knife.

[0009] It also includes a knife seat arranged in a one-to-one correspondence with the knife disc, the knife seat is provided with a bottom knife connected and fixed thereto, the surface of the bottom knife is provided with a knife groove corresponding to the Uli knife, the blade of the Uli knife is located inside the knife groove and the two are in a non-contact state, and the cutting knife is in a contact state with the surface of the bottom knife during the cutting action.

[0010] It also includes a paper picking mechanism for ejecting waste paper strips, the paper picking mechanism is fixedly connected to the knife disc, the paper picking mechanism is arranged close to any one of the U-knives and the two are distributed in the same direction, and the paper picking mechanism and the cutting knife are located on the same side of the U-knives.

[0011] The paper picking mechanism includes a knife core, a paper picking piece and a plurality of elastic telescopic devices. The paper picking piece is located outside the knife core, one end of the paper picking piece is fixedly connected to the knife core, and the other end of the paper picking piece is movably connected to the knife core. The elastic telescopic device is installed inside the knife core, and the elastic end of the elastic telescopic device is exposed from the outer surface of the knife core and is arranged to press against the back side of the paper picking piece.

[0012] A slot is provided on the side wall of the knife core, and one end of the paper picking piece movably connected to the knife core is bent and inserted into the slot to connect with the knife core. The slot is arranged close to one side of the cutting knife, and there is a movable cavity inside the slot. The end of the paper picking piece located inside the movable cavity can be movably arranged, so that the paper picking piece can move by approaching or moving away from the surface of the knife core.

[0013] The elastic telescopic device includes a push rod, a spring and an adjusting screw. A plurality of mounting holes are provided inside the knife core. The push rod is located on the inner outside of the mounting hole and its elastic end is exposed at the outer open position of the mounting hole. The spring is provided in the middle of the mounting hole and its two ends are respectively against the push rod and the adjusting screw. The adjusting screw is located on the inner inside of the mounting hole and is connected to the inner wall of the channel and is axially movable.

[0014] A knife support is also included, and the cutting knife is connected and fixed to the knife disc via the knife support.

[0015] The knife holder is provided with an adjustment seat connected and fixed thereto, and the cutting knife is installed inside the adjustment seat. At the same time, a pressure cover is provided on the outside of the adjustment seat and the knife holder, which presses the adjustment seat and the knife holder and is connected and fixed to the knife disc and / or the knife holder.

[0016] It also includes a height adjustment member, which is located inside the tool holder or the adjustment seat and connected thereto. The inner end of the height adjustment member is pressed against the tool disc or the tool holder and is axially movable, so as to adjust the height of the blade of the cutting knife relative to the tool disc through axial movement.

[0017] It also includes a tool base and a tool pressure cover, which are arranged in parallel and are respectively connected and fixed to the knife disc, and the tool base and the tool pressure cover are clamped and fixed with a U-knife, or a U-knife and a paper picking mechanism.

[0018] The beneficial effects of the present invention are: reasonable structural design, by adopting a clearance-fitted grooving and angle-cutting structure, the use of the excellent knife can achieve zero wear, saving customers a large amount of consumables costs; at the same time, the height of the separately arranged cutting knife is adjustable, and can be adjusted according to its wear condition to ensure its use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is an axonometric structural schematic diagram of the present invention.

[0021] Figure 2 It is a main structural schematic diagram of the present invention.

[0022] Figure 3 It is a structural schematic diagram of the slotting mechanism.

[0023] Figure 4 It is a structural schematic diagram of the angle cutting mechanism.

[0024] Figure 5 yes Figure 2 Schematic diagram of the structure of "AA".

[0025] Figure 6 It is a schematic diagram of the partial cross-sectional structure of the working part of the slotting mechanism.

[0026] Figure 7 It is a schematic diagram of the partial cross-sectional structure of the working part of the angle cutting mechanism.

[0027] Figure 8 It is a structural diagram of the paper picking mechanism.

[0028] Fig. 9 It is a structural schematic diagram of the slotting and cutting knife assembly.

[0029] Fig.10 It is a structural schematic diagram of the corner cutting cutter assembly.

[0030] In the figure: 1, wall panel; 2, lower shaft; 3, upper shaft; 4, slotting knife disc; 5, corner cutting knife disc; 6, corner cutting bottom knife; 7, slotting bottom knife; 8, cutting knife support; 9, corner cutting and cutting knife; 10, corner cutting knife adjustment seat; 11, corner cutting knife adjustment seat pressure cover; 12, corner cutting knife pressure cover; 13, slotting knife base; 14, paper picking piece; 15, slotting and cutting knife; 16, corner cutting knife support; 17, knife adjusting inner gear ring; 18, knife adjusting gear; 19, paper picking mechanism; 20, push rod; 21, spring; 22, adjustment screw; 23, corner cutting inner gear ring pressure cover; 24, slotting inner gear ring pressure cover; 25, slotting knife pressure cover; 26, excellent knife; 27, slotting knife seat, 28 height adjustment member, 29 corner cutting knife base, 30 slot. DETAILED DESCRIPTION

[0031] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0032] according to Figure 1 to Figure 2 As shown: This embodiment provides a grooving and corner cutting device, including a transmission frame composed of a wall panel 1, a lower shaft 2, and an upper shaft 3. The two ends of the lower shaft 2 and the upper shaft 3 are respectively rotatably matched with the wall panel 1 through a shaft seat assembly, and the ends of the lower shaft 2 and the upper shaft 3 can be equipped with gears respectively, so that the lower shaft 2 and the upper shaft 3 can rotate freely under external drive and keep the linear speed rotation consistent, thereby realizing synchronous cooperation operation.

[0033] The lower shaft 2 and the upper shaft 3 are respectively equipped with three groups of slotting mechanisms and one group of corner cutting mechanisms. The three groups of slotting mechanisms are located on the left side, and the corner cutting mechanisms are located on the right side. The number and assembly positions of the slotting mechanisms and corner cutting mechanisms are determined according to the size and processing requirements of the packaging carton.

[0034] The above-mentioned slotting mechanism and angle cutting mechanism are respectively composed of a cutter disc located on the lower shaft 2 and a cutter seat located on the lower shaft 2, and the cutter disc and the cutter seat are respectively connected to the keyways on the lower shaft 2 and the upper shaft 3, so that they rotate synchronously with the lower shaft 2 and the upper shaft 3 to realize operation, wherein the cutter disc of the slotting mechanism is a slotting cutter disc 4, the cutter seat of the slotting mechanism is a slotting cutter seat 27, the cutter disc of the angle cutting mechanism is a corner cutting cutter disc 5, and the cutter seat of the corner cutting mechanism has the same structure as the slotting cutter seat 27, and the specific structure of each component is described as follows.

[0035] according to Figure 3 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 As shown: the slotting cutter disc 4 is sequentially equipped with a knife adjusting inner gear ring 17, a knife adjusting gear 18, a slotting inner gear ring pressure cover 24, a slotting knife base 13, a paper picking mechanism 19, a superior knife 26, a slotting and cutting knife 15, a cutting knife support 8 and a slotting knife pressure cover 25, wherein:

[0036] There are two groups of tools consisting of a U-knife 26 and a slotting and cutting knife 15. The U-knife 26 and the slotting and cutting knife 15 are separately arranged and fixedly connected to the slotting cutter disc 4. The U-knife 26 of each group of tools is arranged in two groups distributed in parallel. The slotting and cutting knife 15 is located at any end of the channel between the two adjacent groups of U-knife 26, and the slotting and cutting knives 15 of the two groups of tools are arranged close to each other. The paper picking mechanism 19 is also provided between the two groups of U-knife 26.

[0037] The slotting knife base 13 is fixed to the slotting knife disc 4 by screws, the slotting and cutting knife 15 is connected and fixed to the corner cutting knife holder 16, the middle part of the slotting and cutting knife 15 is connected and fixed to the end of the slotting knife base 13 by screws, and finally fixed to the slotting knife disc 4, and the fixing hole for setting the screw is a long slot distributed in the meridian direction, so that the screw and the slotting and cutting knife 15 and the corner cutting knife holder 16 can be adjusted in the length direction of the fixing hole (that is, the height direction of the slotting and cutting knife 15), and the screw of the corner cutting knife holder 16 needs to be loosened when adjusting the cutting knife 15. At the same time, two height adjustment members 28 connected to the corner cutter support 16 are arranged at the bottom. The height adjustment members 28 are screwed and threadedly connected to the corner cutter support 16 to achieve axial movement adjustment. The height of the corner cutter support 16 is limited by rotating the height adjustment member 28 so that its end is pressed against the slotting cutter disc 4, and then the two screws in the middle of the slotting and cutting knife 15 are tightened. At this time, the height of the slotting and cutting knife 15 is adjusted. When the blade of the slotting and cutting knife 15 is worn, the above adjustment ensures that the blade height is always consistent with the initial setting height, so as to achieve a stable cutting operation effect on the corrugated cardboard.

[0038] The slotting knife base 13 and the slotting knife pressure cover 25 are arranged in parallel and are respectively connected and fixed to the slotting knife disc 4 by bolts. The slotting knife base 13 is located on the inner side and is arranged close to the slotting knife disc 4, and the slotting knife pressure cover 25 is located on the outer side. The superior knife 26 and the paper picking mechanism 19 are clamped and fixed between the slotting knife base 13 and the slotting knife pressure cover 25.

[0039] The paper picking mechanism 19 includes a knife core, a paper picking piece 14 and a plurality of elastic retractable devices. The paper picking piece 14 is an elastic metal sheet. The paper picking piece 14 is located outside the knife core and its two ends are movably connected to the knife core respectively. The elastic retractable device is installed inside the knife core, and the elastic end of the elastic retractable device is exposed from the outer surface of the knife core and is arranged to press against the back side of the paper picking piece 14, so that when the paper picking piece 14 contacts the corrugated cardboard, the elastic retractable device contracts under the influence of external force, and the corresponding paper picking piece 14 is attached to the surface of the knife core. When the slotting and cutting knife 15 cuts off the paper strip waste of the slotted part of the corrugated cardboard, the elastic retractable device is stretched and reset at this time, and the paper picking piece 14 is pushed open at the same time, so that the paper picking piece 14 leaves the knife core surface and bounces outward. In this process, the paper picking piece 14 will be subjected to force to act on the paper strip waste, so that the paper strip waste is bounced off and separated from the corrugated cardboard, thereby achieving its use effect;

[0040] Furthermore, a slot 30 is provided on the side wall of the knife core, and one end of the paper picking piece 14 is bent and inserted into the slot 30 to connect with the knife core, and the other end of the paper picking piece 14 is connected and fixed to the knife core, wherein the slot 30 is arranged near one side of the slotting and cutting knife 15, and there is a movable cavity inside the slot 30, and the end of the paper picking piece 14 located inside the movable cavity can be movably arranged, so that the paper picking piece 14 can move by approaching or moving away from the surface of the knife core, thereby realizing the action process between the contact and the bounce of the knife core surface in the above process, in which one end of the paper picking piece 14 is relatively fixed, and the end located inside the movable cavity is used as the main action end, because under normal conditions, after the slotting is completed, only the side of the waste paper close to the slotting and cutting knife 15 is connected to the corrugated cardboard, so the paper picking piece 14 can act on the waste paper at this position to realize the separation of the waste paper from the corrugated cardboard;

[0041] Furthermore, the elastic telescopic device includes a push rod 20, a spring 21 and an adjusting screw 22. A plurality of mounting through holes are provided inside the knife core, and the mounting through holes are distributed in a straight line along the length direction of the paper picking piece 14. The push rod 20 is located on the inner outside of the mounting through hole and its elastic end is exposed to the outer open position of the mounting through hole. A limiting portion with a slightly larger diameter is also provided in the middle of the push rod 20. The limiting portion cooperates with the boss inside the through hole to prevent the push rod 20 from being separated from the through hole. The spring 21 is provided in the middle of the mounting through hole and its two ends are respectively against the push rod 20 and the adjusting screw 22. According to the conditions, the spring 21 can also be sleeved on the outside of the push rod 20 and the adjusting screw 22. The adjusting screw 22 is located inside the mounting through hole. On the inner side of the part, the adjusting screw 22 is threadedly connected to the inner wall of the channel and is axially movable. In this structure, the push rod 20 is used to contact the paper picking piece 14 and lift the paper picking piece 14, and the action of the push rod 20 is acted upon by the paper picking piece 14 and the spring 21 at both ends of the push rod 20. When the paper picking piece 14 is subjected to a large force, the spring 21 is compressed. When the paper picking piece 14 is subjected to a small force or no external force, the spring 21 is extended. The setting of the adjusting screw 22 is used to adjust the distance between it and the paper picking piece 14, and the actual length of the through hole where the corresponding spring 21 and the push rod 20 are located is reduced. Since the push rod 20 itself does not change, the corresponding adjustable spring 21 is loose, and the elasticity of the paper picking piece 14 can be adjusted by the spring 21.

[0042] The slotting knife seat 27 is provided with a slotting bottom knife 7 connected and fixed thereto by bolts. The surface of the slotting bottom knife 7 is provided with two groups of knife grooves corresponding to the excellent knife 26 one by one. The blade portion of the excellent knife 26 of the slotting knife disc 4 is located inside the knife groove and the two are in a non-contact state. The excellent knife 26 and the knife groove cooperate with each other for slotting the corrugated cardboard, and the size of the knife groove should be determined according to the size of the excellent knife 26, design requirements and the thickness of the corrugated cardboard; the corresponding slotting cutting knife 15 is in contact with the surface of the slotting bottom knife 7 during the cutting action, and the cutting and separation of the paper strip waste is achieved by the hard contact between the slotting cutting knife 15 and the surface of the slotting bottom knife 7. This action causes the blade portion of the slotting bottom knife 7 to be easily worn. Therefore, in the above structure, the slotting bottom knife 7 and the excellent knife 26 adopt a separately arranged structure, and a structure for adjusting the height of the slotting bottom knife 7 is also provided, which is convenient for replacing or adjusting the slotting bottom knife 7 separately, and the overall production cost can be reduced.

[0043] according to Figure 4 , Figure 7 , Fig.10 As shown: the angle cutting knife disc 5 is sequentially equipped with a knife adjusting inner gear ring 17, a knife adjusting gear 18, an angle cutting inner gear ring pressure cover 23, an angle cutting knife support 16, an angle cutting knife base 29, a superior knife 26, an angle cutting and cutting knife 9, an angle cutting knife adjustment seat 10, an angle cutting knife adjustment seat pressure cover 11, and an angle cutting knife pressure cover 12, wherein:

[0044] There are two groups of tools consisting of a Youli knife 26 and a corner cutting knife 9. The Youli knife 26 and the corner cutting knife 9 are separately arranged and fixedly connected to the corner cutting knife disc 5. Each group of tools has one group of Youli knives 26. The corner cutting knife 9 is located at the end of any one side of the Youli knife 26, and the corner cutting knives 9 of the two groups of tools are arranged close to each other.

[0045] The corner cutting knife 9 is fixed as a whole inside the corner cutting knife adjustment seat 10, so that the blade of the corner cutting knife 9 is arranged to face outward, and the bottom of the corner cutting knife adjustment seat 10 is installed and fixed inside the assembly opening of the corner cutting knife holder 16, and the corner cutting knife holder 16 and the corner cutting knife adjustment seat 10 are also provided with the corner cutting knife adjustment seat pressure cover 11 outside, the corner cutting knife adjustment seat pressure cover 11 is pressed tightly against the corner cutting knife adjustment seat 10 and the corner cutting knife holder 16, and is connected and fixed to the corner cutting knife disc 5 and the corner cutting knife holder 16 by bolts;

[0046] Furthermore, the corner cutting knife adjustment seat 10 is also provided with a height adjustment member 28 connected thereto, and the height adjustment member 28 adopts a top screw and is threadedly connected to the corner cutting knife adjustment seat 10, and the corner cutting knife adjustment seat 10 is connected to the corner cutting knife support 16 as a whole through bolts and height adjustment members 28, respectively, and the bolts are used to connect and fix the corner cutting knife adjustment seat 10 and the corner cutting knife support 16, and the inner end of the height adjustment member 28 is pressed against the corner cutting knife support 16, and its axial activity is realized by rotation, so as to adjust the distance between the corner cutting knife adjustment seat 10 and the corner cutting knife support 16 through axial activity, and then adjust the height of the blade of the corner cutting and cutting knife 9 relative to the corner cutting knife disc 5, so that after the corner cutting and cutting knife 9 is worn, it can be adjusted through the height adjustment member 28 to ensure that the height of the blade of the corner cutting and cutting knife 9 is always consistent with the initial setting height, so as to achieve a stable cutting operation effect on the corrugated cardboard.

[0047] The corner cutting knife base 29 and the corner cutting knife pressure cover 12 are distributed in parallel and are respectively fixed to the corner cutting knife disc 5 by bolts. The corner cutting knife base 29 is located on the inner side and is arranged close to the corner cutting knife disc 5, and the corner cutting knife pressure cover 12 is located on the outer side, and the corner cutting knife base 29 and the corner cutting knife pressure cover 12 clamp and fix the excellent force knife 26.

[0048] The slotting knife seat 27 of the corner cutting mechanism is provided with a corner cutting bottom knife 6 connected and fixed thereto by bolts. A group of knife grooves corresponding to the Uli knife 26 are provided on the surface of the corner cutting bottom knife 6. The blade of the Uli knife 26 of the corner cutting knife disc 5 is located inside the knife groove and the two are in a non-contact state. The Uli knife 26 and the knife groove cooperate with each other for corner cutting of corrugated cardboard, and the size of the knife groove should be determined according to the size of the Uli knife 26, design requirements and the thickness of the corrugated cardboard; the corresponding corner cutting cutting knife 9 is in contact with the surface of the corner cutting bottom knife 6 during the cutting action, and the corner cutting of the corrugated cardboard is achieved by the hard contact between the corner cutting cutting knife 9 and the surface of the corner cutting bottom knife 6. This action causes the blade of the corner cutting bottom knife 6 to be easily worn. Therefore, in the above structure, the corner cutting bottom knife 6 and the Uli knife 26 adopt a separately set structure, and a structure for adjusting the height of the corner cutting bottom knife 6 is also provided, which is convenient for replacing or adjusting the corner cutting bottom knife 6 separately, and the overall production cost can be reduced.

[0049] The working principle of a slotting and corner cutting device is as follows:

[0050] During the operation of the water-based ink printing slotting machine, the upper shaft 3 and the lower shaft 2 respectively drive the slotting cutter disc 4, the corner cutting cutter disc 5, the slotting mechanism and the slotting cutter seat 27 of the corner cutting mechanism to rotate.

[0051] When the corrugated cardboard passes through the passage between the upper shaft 3 and the lower shaft 2, the two excellent knives 26 of the slotting knife disc 4 are inserted into the two knife grooves provided on the slotting bottom knife 7 to cut the corrugated cardboard to complete the slotting, and the slotting cutting knife 15 of the slotting knife disc 4 directly contacts the outer cylindrical surface of the slotting bottom knife 7 to cut off the waste paper strips after slotting to achieve slotting; at the same time, a paper picking mechanism 19 is installed between the two excellent knives 26 of the slotting knife disc 4, and the paper picking sheet 14 is pushed by the elastic telescopic device to automatically eject the cut waste paper strips; the excellent knife 26 of the corner cutting knife disc 5 is inserted into a knife groove provided on the corner cutting bottom knife 6 to cut the edge of the corrugated cardboard longitudinally, and the corner cutting cutting knife 9 of the corner cutting knife disc 5 directly contacts the outer cylindrical surface of the corner cutting bottom knife 6 to cut off the remaining part of the corrugated cardboard to achieve corner cutting.

[0052] The slotting mechanism in the embodiment of the technical solution no longer adopts the traditional slotting knife structure, and the lower knife no longer adopts the traditional excellent rubber pad structure, but directly adopts the excellent knife 26 to cut the slot bottom knife 7 and the corner cutting bottom knife 6. Its advantage is that the traditional slotting tool and excellent rubber pad are cancelled, the excellent knife 26 is not tightly matched with the slotting bottom knife 7 and the corner cutting bottom knife 6, but is in an action state with a gap. The excellent knife 26 and the slotting bottom knife 7 achieve zero wear, which saves customers a lot of consumables costs, and the diameter of the excellent knife 26, the slotting cutting knife 15 and the corner cutting cutting knife 9 in the process of processing corrugated cardboard, the linear speed of cutting the cardboard is always consistent with the travel speed of the corrugated cardboard, which completely avoids the phenomenon of carton slot corner picking caused by the difference in linear speed of traditional tools, which not only greatly reduces the use cost, but also ensures more exquisite molding.

[0053] The above descriptions are only preferred implementation modes of the present invention. As long as the technical solutions for the purpose of the present invention are achieved by substantially the same means, they are all within the protection scope of the present invention.

Claims

1. A slotting and corner cutting device, characterized in that: including a cutter head and at least one set of cutters; The cutting tool comprises a cutting knife and at least one set of U-knives, the U-knives and the cutting knife are separately arranged and connected and fixed to the cutting disc; The cutting knife is located at any side end of the U-knife, or at any end of the channel between two adjacent sets of U-knife; It also includes a paper ejection mechanism for ejecting waste paper strips, the paper ejection mechanism is connected and fixed to the knife disc, the paper ejection mechanism is arranged close to any one of the U-knives and the two are distributed in the same direction, and the paper ejection mechanism and the cutting knife are located on the same side of the U-knives; The paper picking mechanism comprises a knife core, a paper picking piece and a plurality of elastic telescopic devices, wherein the paper picking piece is located outside the knife core, one end of the paper picking piece is fixedly connected to the knife core, and the other end of the paper picking piece is movably connected to the knife core, and the elastic telescopic device is installed inside the knife core, and the elastic end of the elastic telescopic device is exposed from the outer surface of the knife core and is arranged to press against the back side of the paper picking piece; A knife support is also included, and the cutting knife is connected and fixed to the knife disc via the knife support.

2. A slotting and corner cutting device according to claim 1, characterized in that: It also includes a knife seat arranged in a one-to-one correspondence with the knife disc, the knife seat is provided with a bottom knife connected and fixed thereto, the surface of the bottom knife is provided with a knife groove corresponding to the Uli knife, the blade of the Uli knife is located inside the knife groove and the two are in a non-contact state, and the cutting knife is in a contact state with the surface of the bottom knife during the cutting action.

3. A slotting and corner cutting device according to claim 1, characterized in that: A slot is provided on the side wall of the knife core, and one end of the paper picking piece movably connected to the knife core is bent and inserted into the slot to connect with the knife core. The slot is arranged close to one side of the cutting knife, and there is a movable cavity inside the slot. The end of the paper picking piece located inside the movable cavity can be movably arranged, so that the paper picking piece can move by approaching or moving away from the surface of the knife core.

4. A slotting and corner cutting device according to claim 1, characterized in that: The elastic telescopic device includes a push rod, a spring and an adjusting screw. A plurality of mounting holes are provided inside the knife core. The push rod is located on the inner outside of the mounting hole and its elastic end is exposed at the outer open position of the mounting hole. The spring is provided in the middle of the mounting hole and its two ends are respectively against the push rod and the adjusting screw. The adjusting screw is located on the inner inside of the mounting hole and is connected to the inner wall of the channel and is axially movable.

5. The slotting and corner cutting device according to claim 1, characterized in that: The knife holder is provided with an adjustment seat connected and fixed thereto, and the cutting knife is installed inside the adjustment seat. At the same time, a pressure cover is provided on the outside of the adjustment seat and the knife holder, which presses the adjustment seat and the knife holder and is connected and fixed to the knife disc and / or the knife holder.

6. A slotting and corner cutting device according to claim 1 or 5, characterized in that: It also includes a height adjustment member, which is located inside the tool holder or the adjustment seat and connected thereto. The inner end of the height adjustment member is pressed against the tool disc or the tool holder and is axially movable, so as to adjust the height of the blade of the cutting knife relative to the tool disc through axial movement.

7. The slotting and corner cutting device according to claim 1, characterized in that: It also includes a tool base and a tool pressure cover, which are arranged in parallel and are respectively connected and fixed to the knife disc, and the tool base and the tool pressure cover are clamped and fixed with a U-knife, or a U-knife and a paper picking mechanism.

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