Waste removal device for a label printing machine

Abstract

This utility model relates to the field of waste removal technology for printing machines, specifically to a waste removal device for a label printing machine, including a mounting frame, a winding mechanism, and an auxiliary mechanism. The winding mechanism includes a rotating plate rotatably mounted on the mounting frame and two winding rollers rotatably mounted on the rotating plate. The auxiliary mechanism includes a sliding block, a tension spring, a cutter box, a sponge pressing block, a cutter plate, a sliding assembly, and a limiting assembly. The sliding assembly includes a guide groove, a second guide rod, a second spring, a counterweight rod, and a guide slide rod. When the front winding sleeve is full, the rotating plate rotates to switch the rear empty sleeve to the front working position and, in conjunction with the auxiliary mechanism, cuts the waste material without stopping the machine to change the roll. Before cutting the label waste, the sponge pressing block presses the waste material, causing the corner waste material to adhere to the winding sleeve, preventing the waste material from shifting during cutting and ensuring a flat cut. Under the guidance of the guide slide rod and the guide groove, the counterweight rod drives the cutter to slide and cut the corner waste material under the action of inertia, improving the cutting efficiency.

Description

Technical Field

[0001] This utility model relates to the field of waste removal technology for printing machines, specifically to a waste removal device for a label printing machine. Background Technology

[0002] A label printing machine, also known as a self-adhesive printing machine, is a device used to print labels and trademarks. The machine prints the label content onto the surface of self-adhesive material using a printing plate, then uses a die-cutting die to cut the material into labels. Finally, excess self-adhesive material around the edges of the label is removed; this process is called waste removal.

[0003] In existing technology, such as the Chinese patent with publication number CN219193879U entitled "A Waste Removal Device for a Label Printing Machine," the disclosed technical solution describes a device that winds waste label paper onto a sleeve. The sleeve and waste label paper can be removed together from the rubber roller, and then an empty sleeve can be inserted to continue operation. Furthermore, two rubber rollers are used alternately, with empty sleeves on both rollers. When the amount of waste label paper on a sleeve is large enough to require removal, the waste label paper is first broken and wound onto the sleeve of the other rubber roller. Then, the sleeve filled with waste label paper is removed for cleaning, thus shortening the downtime. However, although this device shortens downtime by alternating the use of two rubber rollers, the printing machine shutdown still affects operational efficiency. Utility Model Content

[0004] This invention provides a waste removal device for a label printing machine to solve the above-mentioned problems.

[0005] This utility model adopts the following technical solution: a waste removal device for a label printing machine, including a mounting frame, a winding mechanism, and an auxiliary mechanism; the mounting frame is arranged at the front and rear; a feeding platform is fixedly installed at the front end of the mounting frame, and a waste removal roller is rotatably installed above the rear end of the feeding platform via a connecting assembly; the connecting assembly includes a lifting block; the lifting block is slidably installed above the rear end of the feeding platform, and a waste removal roller is rotatably installed on the lifting block; a screw is rotatably installed on the feeding platform, and the waste removal roller and the screw are threadedly connected; multiple discharge rollers are provided on the rear side of the feeding platform, and the multiple discharge rollers are arranged alternately, and the discharge rollers are rotatably installed on the mounting frame; the winding mechanism includes a rotating plate, a winding roller, a drive assembly, and an auxiliary assembly; the rotating plate is located above the waste removal roller and is rotatably installed on the mounting frame. On the mounting frame, there are two take-up rollers, symmetrically distributed front and rear on the rotating plate. The take-up rollers are rotatably mounted on the rotating plate. A take-up sleeve is fitted on the take-up roller, and the take-up roller and the take-up sleeve are keyed together. A limit plate is threaded onto one end of the take-up roller. The drive assembly is located on the mounting frame and is used to drive the rotating plate and the take-up roller. An auxiliary mechanism is located on the front side of the rotating plate and is used to cut off waste material. The label paper tape is conveyed to the waste discharge roller through the feeding table. The corner waste material on the label paper tape is wrapped around the waste discharge roller and then wound onto the take-up sleeve on the front side. The drive assembly drives the take-up sleeve to rotate through the take-up roller, wrapping the corner waste material around the take-up sleeve. The label paper tape with the corner waste material removed is conveyed to the next process through the discharge roller.

[0006] Furthermore, the auxiliary mechanism includes a sliding block, a tension spring, a tool box, a sponge pressing block, a tool plate, a cutter, a sliding assembly, and a limiting assembly; the sliding block is located on the front side of the rotating plate; the sliding block is slidably mounted on the mounting frame via a sliding groove; the tension spring is located in the sliding groove, with one end of the tension spring fixedly connected to the sliding block and the other end fixedly connected to the sliding groove; the tool box is fixedly mounted on the sliding block, and the sponge pressing block is fixedly mounted on the rear end of the tool box and abuts against the front take-up roller; a through groove is provided on the sponge pressing block, and the through groove communicates with the tool box; the tool plate is slidably mounted in the tool box, and the cutter is fixedly mounted on the rear end of the tool plate; mounting ears are fixedly mounted on both ends of the tool plate, and sliding grooves are provided on the mounting ears; a first guide rod is fixedly mounted in the tool box, and the first guide rod is slidably connected to the sliding groove; a first spring is sleeved on the first guide rod, and one end of the first spring is fixedly connected to the tool box. One end is fixed, and the other end is slidably connected to the mounting ear; under the action of the tension spring, the sponge pressure block presses onto the scrap material on the front winding sleeve; as the scrap material on the front winding sleeve gradually thickens, the sponge pressure block pushes the sliding block through the cutter box to slide forward in the sliding groove, passing through the limiting component and stretching the tension spring; after the scrap material on the front winding sleeve becomes thicker, the rotating plate drives the rear winding sleeve to rotate forward through the rear winding roller; during the rotation, the sliding block is blocked by the limiting component, and after the rear winding roller drives the rear winding sleeve to rotate to the front working position, the limiting component unlocks, and under the action of the tension spring, the sliding block drives the cutter box to slide backward, so that the sponge pressure block presses the scrap material onto the winding sleeve, and then the cutter plate drives the cutter to press onto the scrap material on the winding sleeve under the action of inertia.

[0007] Furthermore, the slicing assembly includes a guide groove, a second guide rod, a second spring, a counterweight rod, and a guide slide rod. The guide groove is located at the upper end of the cutter box, with its front end positioned front to back and its rear end inclined. The second guide rod is fixedly installed at the end of the cutter plate away from the take-up roller, and the counterweight rod is slidably installed on the second guide rod. A second spring is fitted on the second guide rod, with one end fixedly connected to the cutter plate and the other end fixedly connected to the counterweight rod. A guide slide rod is fixedly installed at the upper end of the counterweight rod, and the guide slide rod is slidably connected to the guide groove. After the cutter presses on the corner scrap on the take-up sleeve, the counterweight rod continues to move rearward along the second guide rod to strike the cutter plate. Under the action of the guide slide rod and the guide groove, the cutter plate drives the cutter to slice on the corner scrap, causing the cutter to squeeze and slice the corner scrap, thus cutting off the corner scrap.

[0008] Furthermore, the limiting assembly includes a limiting rod and a lever. The limiting rod is rotatably mounted on the mounting frame via a torsion spring. A wedge-shaped vertical rod is fixed to the end of the limiting rod away from the take-up roller. The upper end of the wedge-shaped vertical rod is a wedge-shaped end. The inclined surface of the wedge-shaped end is located on the upper end of the rear side wall of the wedge-shaped vertical rod. The wedge-shaped end overlaps with the sliding groove. There are two levers, each corresponding to one of the two take-up rollers. The levers are located on the side of the take-up roller away from the axis of the rotating plate. The levers are fixed on the rotating plate. When the sliding block slides forward in the sliding groove, it engages with the inclined surface of the wedge-shaped vertical rod on the limiting rod, causing the wedge-shaped vertical rod to press downward, thereby moving the sliding block to the front of the wedge-shaped vertical rod. Then, the wedge-shaped vertical rod on the limiting rod rotates upward and resets under the action of the torsion spring, preventing the sliding block from sliding backward and resetting. After the rotating plate drives the lever to rotate and moves the limiting rod, the wedge-shaped vertical rod moves downward to release the obstruction and limiting of the sliding block.

[0009] Furthermore, the drive assembly includes a gear ring, a first motor, and a second motor. The gear ring is coaxially fixedly mounted on the rotating plate. The first motor is fixedly mounted on the end of the mounting frame away from the feed table. A gear is fixedly mounted on the output shaft of the first motor, and the gear meshes with the gear ring. The second motor is fixedly mounted on the end of the rotating plate away from the take-up roller, and the output shaft of the second motor is fixedly connected to the take-up roller. The second motor drives the take-up sleeve to rotate through the take-up roller, winding the corner waste material onto the front take-up sleeve. When the corner waste material wound on the front take-up sleeve is thick, the first motor drives the rotating plate to rotate through the gear and gear ring, and rotates the rear idle take-up sleeve to the front working position through the rear take-up roller. Under the action of the auxiliary mechanism, the corner waste material is wound onto the take-up sleeve on the idle take-up roller, and the corner waste material is cut off by the auxiliary mechanism.

[0010] The beneficial effects are: by using the double take-up rollers on the rotating plate, seamless switching can be achieved during the take-up of edge and corner waste materials: when the front take-up sleeve is full, the rotating plate rotates to move the empty sleeve on the rear side to the front side, and the waste material is cut off in conjunction with the auxiliary mechanism. There is no need to stop the machine to change the roll, which greatly improves production efficiency.

[0011] Before cutting, the sponge block presses the waste material firmly, causing the corner waste material to adhere to the winding sleeve, preventing the waste material from shifting during cutting and ensuring a smooth cut; the counterweight rod, guided by the guide slide and guide groove, drives the cutter to cut the corner waste material under the action of inertia, improving cutting efficiency. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a front structural schematic diagram of an embodiment of a waste removal device for a label printing machine according to the present invention;

[0014] Figure 2 This is a schematic diagram of the structure on the back of an embodiment of the present invention;

[0015] Figure 3 This is a schematic diagram of the winding mechanism according to an embodiment of the present invention;

[0016] Figure 4 This is a schematic diagram of the auxiliary mechanism in an embodiment of the present utility model;

[0017] Figure 5 This is a cross-sectional view of the knife box according to an embodiment of the present invention;

[0018] Figure 6 This is a schematic diagram of the limiting component according to an embodiment of the present invention.

[0019] In the diagram: 100, mounting frame; 110, feeding platform; 120, lifting block; 130, waste discharge roller; 140, screw; 150, discharge roller; 200, rotating plate; 210, gear ring; 220, first motor; 230, gear; 240, take-up roller; 250, take-up sleeve; 260, limiting plate; 270, second motor; 300, sliding groove; 310, sliding block; 311, tension spring; 320, tool box; 321, guide groove; 330, sponge pressing block; 331, through groove; 340, tool plate; 341, mounting ear; 342, grooving; 350, first guide rod; 351, first spring; 360, cutter; 370, second guide rod; 371, second spring; 380, counterweight rod; 381, guide slide rod; 400, limiting rod; 410, lever. Detailed Implementation

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] An embodiment of the waste removal device for a label printing machine according to this utility model, such as... Figures 1 to 6As shown: A waste removal device for a label printing machine includes a mounting frame 100, a winding mechanism, and an auxiliary mechanism. The mounting frame 100 is arranged at the front and rear. A feeding platform 110 is fixedly mounted at the front end of the mounting frame 100, and a waste removal roller 130 is rotatably mounted on the upper rear end of the feeding platform 110 via a connecting assembly. The connecting assembly includes a lifting block 120. The lifting block 120 is slidably mounted on the upper rear end of the feeding platform 110, and the waste removal roller 130 is rotatably mounted on the lifting block 120. A screw 140 is rotatably mounted on the feeding platform 110, and the waste removal roller 130 and the screw 140 are threadedly connected. Multiple discharge rollers 150 are provided on the rear side of the feeding platform 110, and the multiple discharge rollers 150 are arranged vertically and vertically in a staggered manner. The discharge rollers 150 are rotatably mounted on the mounting frame 100. The winding mechanism includes a rotating plate 200, a winding roller 240, a drive assembly, and an auxiliary assembly. The rotating plate 200 is located above the waste removal roller 130 and is rotatably mounted on the mounting frame 100. Two take-up rollers 240 are provided, symmetrically distributed front and rear on the rotating plate 200, and rotatably mounted on the rotating plate 200. A take-up sleeve 250 is fitted onto the take-up roller 240, and the take-up roller 240 and the take-up sleeve 250 are keyed together. A limit plate 260 is threaded onto one end of the take-up roller 240. A drive assembly is provided on the mounting frame 100, and the drive assembly is used to drive the rotating plate 200 and the take-up roller 240. Auxiliary The mechanism is located on the front side of the rotating plate 200, and the auxiliary components are used to cut the waste material. The label paper tape is conveyed to the waste discharge roller 130 through the feeding table 110. The corner waste material on the label paper tape is wrapped around the waste discharge roller 130 and then wound onto the front winding sleeve 250. The drive component drives the winding sleeve 250 to rotate through the winding roller 240, and wraps the corner waste material around the winding sleeve 250. The label paper tape with the corner waste material removed is conveyed to the next process through the discharge roller 150.

[0022] The auxiliary mechanism includes a sliding block 310, a tension spring 311, a tool holder 320, a sponge pressing block 330, a tool plate 340, a cutting blade 360, a sliding assembly, and a limiting assembly. The sliding block 310 is located on the front side of the rotating plate 200. The sliding block 310 is slidably mounted on the mounting bracket 100 via a sliding groove 300. The tension spring 311 is located in the sliding groove 300, with one end fixedly connected to the sliding block 310 and the other end fixedly connected to the sliding groove 300. The tool holder 320 is fixedly mounted on the sliding block 310, and the sponge pressing block 330 is fixedly mounted on the sliding block 310. The rear end of the tool box 320 abuts against the front take-up roller 240; a through groove 331 is provided on the sponge pressure block 330, which communicates with the tool box 320; a tool plate 340 is slidably installed in the tool box 320, and a cutter 360 is fixedly installed at the rear end of the tool plate 340; mounting ears 341 are fixedly installed at both ends of the tool plate 340, and grooves 342 are provided on the mounting ears 341; a first guide rod 350 is fixedly installed in the tool box 320, and the first guide rod 350 is slidably connected to the grooves 342; a first spring is sleeved on the first guide rod 350. 351, one end of the first spring 351 is fixedly connected to the tool box 320, and the other end is slidably connected to the mounting ear 341; under the action of the tension spring 311, the sponge pressing block 330 presses against the scrap material on the front winding sleeve 250; as the scrap material on the front winding sleeve 250 gradually thickens, the sponge pressing block 330 pushes the sliding block 310 through the tool box 320 to slide forward through the sliding groove 300 past the limiting component, and stretches the tension spring 311; after the scrap material on the front winding sleeve 250 becomes thicker, the spring turns... The moving plate 200 drives the rear take-up sleeve 250 to rotate forward via the rear take-up roller 240. During the rotation, the sliding block 310 is blocked by the limiting component. After the rear take-up roller 240 drives the rear take-up sleeve 250 to rotate to the front working position, the limiting component is unlocked. Under the action of the tension spring 311, the sliding block 310 drives the cutter box 320 to slide backward, so that the sponge pressing block 330 presses the corner waste material onto the take-up sleeve 250. Then, under the action of inertia, the cutter plate 340 drives the cutter 360 to press onto the corner waste material on the take-up sleeve 250.

[0023] The actuating assembly includes a guide groove 321, a second guide rod 370, a second spring 371, a counterweight rod 380, and a guide slide rod 381. The guide groove 321 is formed on the upper end of the tool box 320, with its front end positioned front-to-back and its rear end inclined. The second guide rod 370 is fixedly installed on the end of the tool plate 340 away from the take-up roller 240, and the counterweight rod 380 is slidably installed on the second guide rod 370. The second spring 371 is sleeved on the second guide rod 370, with one end of the second spring 371 fixedly connected to the tool plate 340 and the other end... The counterweight rod 380 is fixedly connected; a guide slide rod 381 is fixedly installed on the upper end of the counterweight rod 380, and the guide slide rod 381 and the guide groove 321 are slidably connected; after the cutter 360 presses on the corner waste on the winding sleeve 250, the counterweight rod 380 continues to move backward along the second guide rod 370 to strike the cutter plate 340, and under the action of the guide slide rod 381 and the guide groove 321, the cutter plate 340 drives the cutter 360 to slide on the corner waste, so that the cutter 360 squeezes the corner waste and slides on the corner waste, cutting off the corner waste.

[0024] The limiting assembly includes a limiting rod 400 and a lever 410. The limiting rod 400 is rotatably mounted on the mounting bracket 100 via a torsion spring. A wedge-shaped vertical rod is fixed to the end of the limiting rod 400 away from the take-up roller 240. The upper end of the wedge-shaped vertical rod is a wedge-shaped end. The inclined surface of the wedge-shaped end is located on the upper end of the rear side wall of the wedge-shaped vertical rod. The wedge-shaped end overlaps with the sliding groove 300. Two levers 410 are provided, each corresponding to one of the two take-up rollers 240. The levers 410 are located on the side of the take-up roller 240 away from the axis of the rotating plate 200. The levers 410 are fixed to... On the rotating plate 200, when the sliding block 310 slides forward in the sliding groove 300, it engages with the inclined surface of the wedge-shaped vertical rod on the limiting rod 400, causing the wedge-shaped vertical rod to press downward, thereby moving the sliding block 310 to the front side of the wedge-shaped vertical rod. Then, the wedge-shaped vertical rod on the limiting rod 400 rotates upward and resets under the action of the torsion spring, preventing the sliding block 310 from sliding backward and resetting. After the rotating plate 200 drives the lever 410 to rotate and moves the limiting rod 400, the wedge-shaped vertical rod moves downward and releases the blocking and limiting effect on the sliding block 310.

[0025] The drive assembly includes a gear ring 210, a first motor 220, and a second motor 270. The gear ring 210 is coaxially fixedly mounted on the rotating plate 200. The first motor 220 is fixedly mounted on the end of the mounting bracket 100 away from the feed table 110. A gear 230 is fixedly mounted on the output shaft of the first motor 220, and the gear 230 meshes with the gear ring 210. The second motor 270 is fixedly mounted on the end of the rotating plate 200 away from the take-up roller 240, and the output shaft of the second motor 270 is fixedly connected to the take-up roller 240. The second motor 270 is connected via... The take-up roller 240 drives the take-up sleeve 250 to rotate, winding the corner waste material onto the front take-up sleeve 250. When the corner waste material wound on the front take-up sleeve 250 is thick, the first motor 220 drives the rotating plate 200 to rotate through the gear 230 and the gear ring 210. The rear take-up roller 240 rotates the idle rear take-up sleeve 250 to the front working position. Under the action of the auxiliary mechanism, the corner waste material is wound onto the take-up sleeve 250 on the idle take-up roller 240, and the corner waste material is cut off by the auxiliary mechanism.

[0026] Based on the above embodiments, the working principle and process of this utility model are as follows: The label tape is conveyed to the waste discharge roller 130 through the feeding table 110. The scrap material on the label tape is wound around the waste discharge roller 130 and onto the front winding sleeve 250. The corresponding second motor 270 drives the winding sleeve 250 to rotate through the winding roller 240, thus winding the scrap material onto the front winding sleeve 250. Under the action of the tension spring 311, the sponge pressure block 330 presses down on the scrap material wound onto the front winding sleeve 250. As the material is wound onto the front winding sleeve 250... As the scrap material on the sleeve 250 gradually thickens, the sponge pressing block 330 pushes the sliding block 310 forward in the sliding groove 300 through the tool box 320, stretching the tension spring 311. When the sliding block 310 slides forward in the sliding groove 300, it engages with the inclined surface of the wedge-shaped vertical rod on the limiting rod 400, causing the wedge-shaped vertical rod to press downward, thereby moving the sliding block 310 to the front side of the wedge-shaped vertical rod. Afterward, the wedge-shaped vertical rod on the limiting rod 400 rotates upward and resets under the action of the torsion spring, preventing the sliding block 310 from moving towards the rotating plate 200.

[0027] After the thicker scrap material is wound onto the front take-up sleeve 250, such as... Figure 1In the indicated orientation, the first motor 220 drives the rotating plate 200 to rotate clockwise via the gear 230 and the gear ring 210. The rotating plate 200 drives the rear take-up sleeve 250 to rotate forward via the rear take-up roller 240. During the rotation, the sliding block 310 is blocked and limited by the wedge-shaped vertical rod. The rotating plate 200 rotates the rear take-up sleeve 250 to the front working position via the rear take-up roller 240. At the same time, the rotating plate 200 also drives the lever 410 to rotate synchronously with the rear take-up sleeve 250 and pushes the limiting rod 400 to rotate counterclockwise, causing the wedge-shaped vertical rod to move downward and release the blocking and limiting effect on the sliding block 310. Under the action of the tension spring 311, the sliding block 310 drives the tool box 320 to slide to the rear of the take-up sleeve 250, so that the sponge pressing block 330 presses the scrap material onto the take-up sleeve 250. Then, under the action of inertia, the cutter plate 340 drives the cutter 360 to press on the corner scrap on the take-up sleeve 250. After the cutter 360 presses on the corner scrap on the take-up sleeve 250, the counterweight rod 380 continues to move backward along the second guide rod 370 to strike the cutter plate 340. Under the action of the guide slide rod 381 and the guide groove 321, the cutter plate 340 drives the cutter 360 to slide on the corner scrap, so that the cutter 360 squeezes the corner scrap and slides on the corner scrap, cutting off the corner scrap and winding the corner scrap onto the new take-up sleeve 250. At this time, the operator unscrews the limit plate 260 on another take-up roller 240 and replaces the take-up sleeve 250 with corner scrap, so that the take-up sleeve 250 with corner scrap can be replaced without stopping the work.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A waste discharge device for a label printing machine, characterized in that: Includes mounting bracket (100), winding mechanism and auxiliary mechanism; The mounting frame (100) is arranged at the front and rear. A feeding platform (110) is fixedly installed at the front end of the mounting frame (100), and a waste discharge roller (130) is rotatably installed above the rear end of the feeding platform (110) through a connecting assembly. Multiple discharge rollers (150) are provided on the rear side of the feeding platform (110), and the multiple discharge rollers (150) are arranged alternately up and down. The discharge rollers (150) are rotatably installed on the mounting frame (100). The winding mechanism includes a rotating plate (200), a winding roller (240), a drive assembly, and an auxiliary assembly; the rotating plate (200) is located above the waste discharge roller (130) and is rotatably mounted on the mounting frame (100); there are two winding rollers (240), which are symmetrically distributed on the rotating plate (200) and rotatably mounted on the rotating plate (200); The drive assembly is mounted on the mounting frame (100) and is used to drive the rotating plate (200) and the winding roller (240); The auxiliary mechanism is located on the front side of the rotating plate (200), and the auxiliary component is used to cut off the waste material.

2. The waste discharge device for a label printing machine according to claim 1, characterized in that: The auxiliary mechanism includes a sliding block (310), a tension spring (311), a tool box (320), a sponge pressing block (330), a tool plate (340), a cutting blade (360), a sliding assembly, and a limiting assembly; The sliding block (310) is located on the front side of the rotating plate (200); the sliding block (310) is slidably mounted on the mounting bracket (100) through the sliding groove (300); The tension spring (311) is disposed in the sliding groove (300), one end of the tension spring (311) is fixedly connected to the sliding block (310), and the other end is fixedly connected to the sliding groove (300); The tool box (320) is fixedly mounted on the sliding block (310), and the sponge pressing block (330) is fixedly mounted on the rear end of the tool box (320) and abuts against the front winding roller (240); the sponge pressing block (330) is provided with a through groove (331), and the through groove (331) communicates with the tool box (320); The cutter plate (340) is slidably installed in the cutter box (320), and the cutter (360) is fixedly installed at the rear end of the cutter plate (340); mounting ears (341) are fixedly installed at both ends of the cutter plate (340), and the mounting ears (341) are provided with sliding grooves (342); a first guide rod (350) is fixedly installed in the cutter box (320), and the first guide rod (350) and the sliding groove (342) are slidably connected; a first spring (351) is sleeved on the first guide rod (350), one end of the first spring (351) is fixedly connected to the cutter box (320), and the other end is slidably connected to the mounting ear (341).

3. The waste discharge device for a label printing machine according to claim 2, characterized in that: The actuating assembly includes a guide groove (321), a second guide rod (370), a second spring (371), a counterweight rod (380), and a guide slide rod (381). The guide groove (321) is formed on the upper end of the tool box (320), with the front end of the guide groove (321) positioned front to back and the rear end inclined. The second guide rod (370) is fixedly installed on the end of the tool plate (340) away from the take-up roller (240), and the counterweight rod (380) is slidably installed on the second guide rod (370). The second spring (371) is sleeved on the second guide rod (370), with one end of the second spring (371) fixedly connected to the tool plate (340) and the other end fixedly connected to the counterweight rod (380). The guide slide rod (381) is fixedly installed on the upper end of the counterweight rod (380), and the guide slide rod (381) is slidably connected to the guide groove (321).

4. The waste discharge device for a label printing machine according to claim 3, characterized in that: The limiting assembly includes a limiting rod (400) and a lever (410). The limiting rod (400) is rotatably mounted on the mounting frame (100) via a torsion spring. A wedge-shaped vertical rod is fixed to the end of the limiting rod (400) away from the take-up roller (240). The upper end of the wedge-shaped vertical rod is a wedge-shaped end. The inclined surface of the wedge-shaped end is located on the upper end of the rear side wall of the wedge-shaped vertical rod. The wedge-shaped end overlaps with the sliding groove (300). There are two levers (410), which correspond one-to-one with the two take-up rollers (240). The levers (410) are located on the side of the take-up roller (240) away from the axis of the rotating plate (200). The levers (410) are fixed on the rotating plate (200).

5. The waste discharge device for a label printing machine according to claim 4, characterized in that: The drive assembly includes a gear ring (210), a first motor (220), and a second motor (270). The gear ring (210) is coaxially fixedly mounted on the rotating plate (200). The first motor (220) is fixedly mounted on the end of the mounting bracket (100) away from the feed table (110). A gear (230) is fixedly mounted on the output shaft of the first motor (220), and the gear (230) meshes with the gear ring (210). The second motor (270) is fixedly mounted on the end of the rotating plate (200) away from the take-up roller (240), and the output shaft of the second motor (270) is fixedly connected to the take-up roller (240).

6. The waste discharge device for a label printing machine according to claim 5, characterized in that: The take-up roller (240) is fitted with a take-up sleeve (250), and the take-up roller (240) and the take-up sleeve (250) are keyed together; a limit plate (260) is threadedly installed at one end of the take-up roller (240).

7. The waste discharge device for a label printing machine according to claim 6, characterized in that: The connecting assembly includes a lifting block (120); the lifting block (120) is slidably installed above the rear end of the feeding platform (110), a waste discharge roller (130) is rotatably installed on the lifting block (120), and a screw (140) is rotatably installed on the feeding platform (110), and the waste discharge roller (130) and the screw (140) are threadedly connected.

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