Leftover material crushing equipment for corrugated carton production

Abstract

The invention relates to the technical field of resource recycling, in particular to leftover material crushing equipment for corrugated carton production, which comprises a rack, a crushing box is arranged on the rack, two crushing rollers are arranged in the crushing box, a crushing driving mechanism for driving the two crushing rollers to rotate relatively is further arranged on the rack, and a feeding bin is horizontally arranged above the crushing box. The feeding bin is of a front-back through structure, and openings in the front end and the rear end of the feeding bin are a feeding port and a discharging port correspondingly. The feeding bin is designed at the open end of the crushing box, long waste paper sheets do not need to be shredded or erected by a worker to be put into the crushing box, the long waste paper sheets can be directly inserted into the feeding bin, and then the front ends of the paper sheets can be automatically bent and enter the crushing box under the constraint of the first baffle and the second baffle; and therefore, the convenience of feeding the long-size paper sheets by the crushing equipment is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of resource recycling technology, specifically to a scrap crushing device for corrugated cardboard box production. Background Technology

[0002] The production process of corrugated cardboard boxes generates a large amount of waste paper scraps in multiple stages, from raw paper slitting and longitudinal creasing to cross-cutting and forming. In particular, during the trimming process on the cardboard production line, continuous long strips of waste edges are formed on both sides; and irregularly shaped fragments of waste material are also generated in the die-cutting process of irregularly shaped cardboard boxes.

[0003] Currently, the recycling process for such waste paper typically involves first collecting the waste manually or via conveyor belt, then using crushing equipment to break it into fine fibers or fragments, and finally sending it back into the papermaking and pulping process to achieve resource recycling. This reduces raw material costs and aligns with the concept of green manufacturing.

[0004] However, existing shredding equipment still has certain drawbacks in practical applications. For example, while large industrial-grade shredders have strong processing capabilities and can directly handle larger-sized waste materials, their bulky size results in a large footprint, high motor power, and high energy consumption, making the purchase and maintenance costs too high for small and medium-sized cardboard box factories. Conversely, while small shredders are compact and occupy less space, their feed inlet size is small. When faced with large-sized paper scraps (such as whole strips of trimming waste) generated during production, the paper scraps are much larger than the feed inlet and cannot be directly fed in. Operators must first manually tear or pre-cut them, which not only increases labor intensity but also reduces production efficiency. To address these shortcomings, we propose a shredding device for corrugated cardboard box production scraps to effectively solve the above-mentioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide a scrap crushing device for corrugated cardboard box production, which solves the problems of large-volume crushing devices having large footprints and high costs, and small-volume crushing devices having difficulty in feeding materials.

[0006] The present invention is achieved through the following technical solution: a scrap crushing device for corrugated cardboard box production, including a frame, a crushing box on the frame, two crushing rollers inside the crushing box, a crushing drive mechanism on the frame for driving the two crushing rollers to rotate relative to each other, a feeding bin horizontally arranged above the crushing box, the feeding bin having a through structure, and the openings at the front and rear ends of the feeding bin being the inlet and outlet respectively, a first baffle hinged to the top wall of the feeding bin at the outlet end, a second baffle hinged to the end of the first baffle, and the second baffle being arranged vertically and fixed to the top of the crushing box; The top and bottom walls of the feeding hopper are both provided with through openings. Inside the feeding hopper, on opposite sides and within the through openings, there are extrusion drive mechanisms. The extrusion drive mechanism includes a moving frame, in which multiple feeding rollers are rotatably arranged. One of the moving frames is also provided with a rotation drive assembly, which is used to control the rotation of one of the feeding rollers. The movable frame is slidably disposed in the opening along the thickness direction of the feed bin, and the feeding rollers in the two movable frames are symmetrically distributed facing each other.

[0007] Optionally, the top of both the first baffle and the second baffle is provided with a positioning component. The positioning component includes an outer blocking plate, an inner blocking plate, and two side blocking plates. The outer blocking plate, the inner blocking plate, and the two side blocking plates together form a quadrilateral. When the top wall of the feed hopper abuts against the outer blocking plate, the first baffle and the top wall of the feed hopper are parallel. When the top wall of the feed hopper abuts against the inner blocking plate, the angle between the first baffle and the top wall of the feed hopper is 135°. When the first baffle and the outer blocking plate abut against each other, the first baffle and the second baffle are parallel. When the first baffle and the inner blocking plate abut against each other, the angle between the first baffle and the second baffle is 135°.

[0008] Optionally, the side baffle has locking bolts, and the end of the first baffle and one end of the top wall of the feed hopper each have two positioning holes. When the locking bolts are inserted into the two positioning holes respectively, the first baffle and the top wall of the feed hopper can abut against the outer baffle and the inner baffle respectively. The inner and outer surfaces of the feed hopper, located at the opening, are respectively provided with an inner protective frame and an outer protective frame, and the two movable frames are slidably engaged with the two inner protective frames respectively.

[0009] Optionally, the side of the movable frame facing away from the center of the feed hopper is elastically connected to a mounting part via an elastic element. A permanent magnet is fixedly embedded in the surface of the mounting part. An electromagnet is provided inside the outer protective frame, directly opposite the permanent magnet. When the electromagnet is energized, the opposing magnetic poles of the electromagnet and the permanent magnet are the same, and the feeding rollers in the two extrusion drive mechanisms are aligned and in contact. The rotary drive assembly includes a motor, which is fixedly mounted on the back of the movable frame. A first bevel gear is coaxially mounted on the output shaft of the motor, and a second bevel gear is fitted on one of the feeding rollers. The first and second bevel gears mesh with each other.

[0010] Optionally, the movable frame has a guide plate at one end near the feed inlet of the feed hopper, and two guide plates form a figure-eight shape. The axial direction of the feeding roller is consistent with the width direction of the feed hopper and the axial direction of the crushing roller, and several feeding rollers are evenly spaced on the inner side of the movable frame. The outer layer of the feeding roller is made of rubber. The second baffle is fixedly installed at the top of the crushing box, near the middle.

[0011] Compared with the prior art, the present invention provides a scrap material crushing device for corrugated cardboard box production, which has the following advantages: 1. The present invention designs a feeding hopper at the opening end of the shredding box. For long waste paper pieces, the workers no longer need to tear them or put them upright into the shredding box. Instead, they can directly insert them into the feeding hopper. Then, under the constraint of the first baffle and the second baffle, the front end of the paper piece can be automatically bent and enter the shredding box, thus greatly improving the convenience of feeding long paper pieces into the shredding equipment. 2. The feeding bin in this invention can also be arranged vertically, so that workers can throw small pieces of waste paper directly into the feeding bin from top to bottom. The feeding bin can keep the paper pieces in a vertical position when entering the crushing box, thereby improving the efficiency of the crushing roller in shredding the paper pieces. 3. The feeding hopper in this invention also has a squeezing drive mechanism, which is used to drive the paper sheets to continuously enter, thereby making it easier for workers to feed the paper. 4. The two sets of extrusion drive mechanisms in this invention can be relatively close or far apart, so that they can be separated from each other when the feed hopper is placed vertically, thus making it easier and faster for the paper to fall. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a side view of the structure of the present invention; Figure 3 This is a schematic diagram of the feed hopper structure of the present invention; Figure 4 This is a cross-sectional view of the feed hopper in its first state according to the present invention; Figure 5 This is a cross-sectional view of the feed hopper in the second state of the present invention; Figure 6 This is a schematic diagram of the crushing box structure of the present invention; Figure 7 This is a cross-sectional view of the movable frame structure of the present invention; Figure 8 for Figure 3 Enlarged view of point A in the middle; Figure 9 for Figure 4 Enlarged view of the corresponding area at point B.

[0013] In the diagram: 100, frame; 200, crushing box; 201, crushing roller; 300, crushing drive mechanism; 400, feed hopper; 401, first baffle; 402, second baffle; 403, positioning assembly; 4031, outer blocking plate; 4032, inner blocking plate; 4033, side blocking plate; 4034, locking bolt; 404, through port; 405, extrusion drive mechanism; 4051, moving frame; 4052, feeding roller; 406, inner protective frame; 407, outer protective frame; 408, elastic element; 409, mounting part; 410, permanent magnet; 411, electromagnet; 412, rotation drive assembly; 4121, electric motor; 4122, first bevel gear; 413, guide plate. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] Existing small-scale paper shredders typically consist of two meshing shredding rollers that rotate relative to each other via an external drive, shredding the paper inside. In practical applications, when shredding long pieces of paper, the paper's length exceeds the opening of the shredding chamber, preventing it from being placed flat. Therefore, operators often need to pre-cut the paper or insert one end of it vertically into the chamber. This method is not only laborious, but also requires the operator to hold the paper during shredding to prevent it from tipping over and potentially damaging external equipment, resulting in low shredding efficiency.

[0016] Meanwhile, when shredding small pieces of paper, if the paper is placed flat directly into the shredding chamber, the two shredding rollers will continuously rub against the lower surface of the paper. Initially, this may cause the rollers to spin idly without gripping the paper. Only when the protrusions on the rollers hook one end of the paper can the paper be pulled between the rollers. Therefore, the shredding efficiency for small pieces of paper needs improvement. To solve these problems, we propose the following technical solution: Please see Figure 1 - Figure 9This application discloses a scrap material shredding device for corrugated cardboard box production, including a frame 100, a shredding box 200 mounted on the frame 100, two shredding rollers 201 inside the shredding box 200, and a shredding drive mechanism 300 for driving the two shredding rollers 201 to rotate relative to each other. The shredding drive mechanism 300 includes a motor and two gears. The two gears are located outside the shredding box 200 and are coaxially connected to the two shredding rollers 201 respectively, and the two gears mesh with each other. The output shaft of the motor is coaxially connected to one of the shredding rollers 201 through a transmission component such as a belt, synchronous belt, or chain. Therefore, the shredding drive mechanism 300 can drive the two shredding rollers 201 to rotate relative to each other, thereby shredding the paper scraps that enter them.

[0017] In this embodiment, a feeding bin 400 is horizontally arranged above the crushing box 200. The feeding bin 400 has a through structure, and the openings at the front and rear ends of the feeding bin 400 are the feeding port and the discharging port, respectively. A first baffle 401 is hinged to the top wall of the feeding bin 400 at the discharging port end. A second baffle 402 is hinged to the end of the first baffle 401. The second baffle 402 is arranged vertically and fixed at the top of the crushing box 200 near the middle. Both the first baffle 401 and the second baffle 402 are rectangular plate structures, and their lengths are equivalent to the length of the crushing box 200. When the paper passes through the feeding bin 400, under the constraint of the first baffle 401 and the second baffle 402, the front end of the paper is bent downward and enters the crushing box 200. Then, under the tearing of the two crushing rollers 201, the paper continues to extend into the crushing box 200.

[0018] It should be noted that the feed hopper 400, the first baffle 401, and the second baffle 402 are all made of high-strength hard materials, such as aluminum alloy. The bottom of the second baffle 402 and the top of the crushing box 200 are fixed together by bolts.

[0019] As one embodiment and not a limitation, both the first baffle 401 and the second baffle 402 are provided with positioning components 403 at their top ends. The positioning component 403 includes an outer blocking plate 4031, an inner blocking plate 4032, and two side blocking plates 4033. The outer blocking plate 4031, the inner blocking plate 4032, and the two side blocking plates 4033 together form a quadrilateral. When the top wall of the feed hopper 400 abuts against the outer blocking plate 4031, the first baffle 401... 01 is parallel to the top wall of the feed hopper 400. When the top wall of the feed hopper 400 and the inner baffle plate 4032 abut, the angle between the first baffle plate 401 and the top wall of the feed hopper 400 is 135°. When the first baffle plate 401 and the outer baffle plate 4031 abut, the first baffle plate 401 and the second baffle plate 402 are parallel. When the first baffle plate 401 and the inner baffle plate 4032 abut, the angle between the first baffle plate 401 and the second baffle plate 402 is 135°. When the angle between the first baffle plate 401 and the second baffle plate 402 is 135°, and the angle between the first baffle plate 401 and the top wall of the feed hopper 400 is also 135°, such as... Figure 4 As shown, the feed hopper 400 is horizontally arranged at this time; when the first baffle 401, the second baffle 402, and the top wall of the feed hopper 400 are all parallel, as... Figure 5 As shown, with the vertical arrangement of the feed hopper 400, the paper can directly enter the crushing box 200 from top to bottom.

[0020] It should be noted that the side baffle plate 4033 has a locking bolt 4034, and both the end of the first baffle plate 401 and one end of the top wall of the feed hopper 400 have two positioning holes. When the locking bolt 4034 is inserted into the two positioning holes respectively, the first baffle plate 401 and the top wall of the feed hopper 400 can abut against the outer baffle plate 4031 and the inner baffle plate 4032 respectively. In other words, the function of the locking bolt 4034 is to fix the position of the first baffle plate 401 and the top wall of the feed hopper 400, while the outer baffle plate 4031 and the inner baffle plate 4032 can be used to enhance the stability of the feed hopper 400 structure.

[0021] It should also be noted that since adjusting the state of the feed hopper 400 is quite troublesome, large and small paper pieces need to be placed separately during the actual crushing operation. When the feed hopper 400 is adjusted to a horizontal position, large paper pieces are crushed first, and when the feed hopper 400 is adjusted to a vertical position, small paper pieces are crushed first.

[0022] In summary, in the specific implementation of this embodiment, when the paper to be shredded is of a relatively long size, the feeding hopper 400 is kept horizontal. One end of the paper is then inserted into the feed inlet of the feeding hopper 400. As the paper extends inward, it is constrained by the first baffle 401 and the second baffle 402, causing the front end of the paper to bend downward and enter the shredding chamber 200. Compared to traditional methods, this embodiment does not require pre-cutting of the paper or for workers to stand the paper upright, thus saving time and effort.

[0023] When the paper pieces to be shredded are short in size, the feed hopper 400 can be kept vertical, and the paper pieces can be dropped into the feed hopper 400 from top to bottom. Under the constraint of the feed hopper 400, the paper pieces can be kept vertical as they enter between the two shredding rollers 201. In this way, as soon as the paper pieces enter the shredding chamber 200, they can be directly gripped by the shredding rollers 201, preventing the shredding rollers 201 from spinning idly, which helps to improve the paper shredding efficiency of the shredding equipment.

[0024] In another embodiment of this application, both the top and bottom walls of the feeding hopper 400 are provided with through openings 404. Extrusion drive mechanisms 405 are located on opposite sides of the feeding hopper 400 within the through openings 404. Each extrusion drive mechanism 405 includes a movable frame 4051, within which multiple feeding rollers 4052 are rotatably arranged. The movable frame 4051 is slidably disposed within the through openings 404 along the thickness direction of the feeding hopper 400, and the feeding rollers 4052 in the two movable frames 4051 are symmetrically distributed facing each other. Inner protective frames 406 and outer protective frames 407 are respectively provided on the inner and outer surfaces of the feeding hopper 400 at the through openings 404. The two movable frames 4051 are slidably engaged with the two inner protective frames 406. That is, the two extrusion drive mechanisms 405 can move closer to or further away from each other.

[0025] As one embodiment and not a limitation, the side of the movable frame 4051 facing away from the center of the feed hopper 400 is elastically connected to the mounting part 409 via an elastic member 408. The elastic member 408 is a spring, and its two ends are fixedly connected to the mounting part 409 and the movable frame 4051, respectively. A permanent magnet block 410 is embedded in the surface of the mounting part 409. An electromagnet 411 is provided inside the outer protective frame 407, directly opposite the permanent magnet block 410. When the electromagnet 411 is energized, the opposing magnetic poles of the electromagnet 411 and the permanent magnet block 410 are the same. At this time, under the action of repulsion, the two extrusion drive mechanisms 405 are close to each other, and the feeding rollers 4052 in the two extrusion drive mechanisms 405 are aligned and attached. When the electromagnet 411 is de-energized, the permanent magnet block 410 can attract the electromagnet 411. At this time, the two extrusion drive mechanisms 405 are separated, with a gap between them. It is worth mentioning that when the electromagnet 411 is energized, although the feeding rollers 4052 in the two extrusion drive mechanisms 405 are aligned and attached, the moving frame 4051 is elastically connected to the mounting part 409. Therefore, when the paper enters it, the two extrusion drive mechanisms 405 can adaptively separate, while the feeding rollers 4052 can be tightly attached to the paper.

[0026] One of the movable frames 4051 is also equipped with a rotary drive assembly 412, which controls the rotation of one of the feeding rollers 4052. The rotary drive assembly 412 includes a motor 4121, which is fixedly mounted on the back of the movable frame 4051. The output shaft of the motor 4121 is coaxially provided with a first bevel gear 4122, and a second bevel gear is fitted on one of the feeding rollers 4052. The first bevel gear 4122 and the second bevel gear mesh with each other. The function of the rotary drive assembly 412 is to control the rotation of the feeding roller 4052, so that the paper can automatically extend into the feed roller after the user releases it, making it easier for the operator.

[0027] It is worth mentioning that the movable frame 4051 has a guide plate 413 near the feed inlet of the feed bin 400, and two guide plates 413 form a figure-eight shape. The function of the guide plate 413 is to allow the paper to directly enter between the two rotary drive components 412 when inserted, without it hitting the side of the movable frame 4051. The axial direction of the feeding roller 4052 is consistent with the width direction of the feed bin 400 and the axial direction of the crushing roller 201, and several feeding rollers 4052 are evenly spaced on the inner side of the movable frame 4051, and the outer layer of the feeding roller 4052 is made of rubber. The rubber material can increase the friction, and the rubber itself has a certain elasticity, which can better fit the surface of the paper, thereby driving the paper to continuously enter.

[0028] In the specific application of this embodiment, when the paper to be crushed is long, the feed hopper 400 is kept horizontal and the electromagnet 411 is energized. At this time, the feeding rollers 4052 in the two extrusion drive mechanisms 405 are in contact with each other. Then the user inserts one end of the paper into the feed hopper 400. Driven by the feeding rollers 4052, the paper continues to enter and, under the constraint of the first baffle 401 and the second baffle 402, the front end of the paper bends and enters the crushing box 200.

[0029] When the paper pieces to be shredded are short, the feed hopper 400 is kept in a vertical position, and the electromagnet 411 is de-energized. At this time, the two extrusion drive mechanisms 405 separate, allowing the paper pieces to fall smoothly into the feed hopper 400. It should be noted that since the feed hopper 400 is in a vertical position at this time, the feed roller 4052 is not required to drive the paper pieces downwards, and the speed is faster. Therefore, in this embodiment, separating the two extrusion drive mechanisms 405 when the feed hopper 400 is in a vertical position allows for faster paper shredding.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A scrap material crushing device for corrugated cardboard box production, comprising a frame, a crushing box mounted on the frame, two crushing rollers mounted inside the crushing box, and a crushing drive mechanism mounted on the frame for driving the two crushing rollers to rotate relative to each other, characterized in that: A feeding hopper is horizontally arranged above the crushing box. The feeding hopper has a through structure, and the openings at the front and rear ends of the feeding hopper are the feeding port and the discharging port, respectively. A first baffle is hinged to the top wall of the feeding hopper at the discharging port end. A second baffle is hinged to the end of the first baffle. The second baffle is arranged vertically and fixed to the top of the crushing box. The top and bottom walls of the feeding hopper are both provided with through openings. Inside the feeding hopper, on opposite sides and within the through openings, there are extrusion drive mechanisms. The extrusion drive mechanism includes a moving frame, in which multiple feeding rollers are rotatably arranged. One of the moving frames is also provided with a rotation drive assembly, which is used to control the rotation of one of the feeding rollers. The movable frame is slidably disposed in the opening along the thickness direction of the feed bin, and the feeding rollers in the two movable frames are symmetrically distributed facing each other.

2. The scrap crushing equipment for corrugated cardboard box production according to claim 1, characterized in that: The top of both the first and second baffles is provided with positioning components. The positioning components include an outer blocking plate, an inner blocking plate, and two side blocking plates. The outer blocking plate, the inner blocking plate, and the two side blocking plates together form a quadrilateral. When the top wall of the feed hopper abuts against the outer blocking plate, the first baffle and the top wall of the feed hopper are parallel. When the top wall of the feed hopper abuts against the inner blocking plate, the angle between the first baffle and the top wall of the feed hopper is 135°. When the first baffle and the outer blocking plate abut against each other, the first baffle and the second baffle are parallel. When the first baffle and the inner blocking plate abut against each other, the angle between the first baffle and the second baffle is 135°.

3. The scrap crushing equipment for corrugated cardboard box production according to claim 2, characterized in that: The side baffle has a locking bolt. The end of the first baffle and one end of the top wall of the feed hopper each have two positioning holes. When the locking bolt is inserted into the two positioning holes respectively, the first baffle and the top wall of the feed hopper can abut against the outer baffle and the inner baffle respectively.

4. The scrap crushing equipment for corrugated cardboard box production according to claim 1, characterized in that: The inner and outer surfaces of the feed hopper are respectively provided with an inner protective frame and an outer protective frame at the opening, and the two movable frames are slidably engaged with the two inner protective frames respectively.

5. The scrap crushing equipment for corrugated cardboard box production according to claim 4, characterized in that: The side of the movable frame facing away from the center of the feed hopper is elastically connected to the mounting part by an elastic element. A permanent magnet block is embedded in the surface of the mounting part. An electromagnet is provided inside the outer protective frame and at the position opposite to the permanent magnet block. When the electromagnet is energized, the opposite ends of the electromagnet and the permanent magnet block have the same magnetic poles, and the feeding rollers in the two extrusion drive mechanisms are aligned and attached.

6. The scrap crushing equipment for corrugated cardboard box production according to claim 1, characterized in that: The rotary drive assembly includes an electric motor, which is fixedly mounted on the back of the movable frame. The output shaft of the electric motor is coaxially provided with a first bevel gear, and a second bevel gear is fitted on one of the feeding rollers. The first bevel gear and the second bevel gear mesh with each other.

7. The scrap crushing equipment for corrugated cardboard box production according to claim 1, characterized in that: The movable frame is equipped with a guide plate at one end near the feed inlet of the feed hopper, and the two guide plates form a figure-eight shape.

8. The scrap crushing equipment for corrugated cardboard box production according to claim 1, characterized in that: The axial direction of the feeding roller is consistent with the width direction of the feeding bin and the axial direction of the crushing roller, and several feeding rollers inside the moving frame are evenly spaced.

9. The scrap crushing equipment for corrugated cardboard box production according to claim 1, characterized in that: The outer layer of the feeding roller is made of rubber.

10. A scrap material crushing device for corrugated cardboard box production according to claim 1, characterized in that: The second baffle is fixedly installed at the top of the crushing box, near the middle.

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