Single-axis bag opening machine

Abstract

The present invention provides a single-axis bag opener, which relates to the field of bag openers. The single-axis bag opener includes a chassis, a knife roller and a fixed knife assembly. The knife roller includes a roller shaft, a movable knife seat and a movable knife. The movable knife is installed on the movable knife seat. The surface of the roller shaft is also protruded with a cutting knife. The fixed knife assembly includes a fixed knife seat, a long fixed knife and a short fixed knife arranged parallel to the axial direction. The long fixed knife and the short fixed knife are alternately arranged along the length direction of the fixed knife seat. The long fixed knife is protruded toward the side close to the roller shaft. An engaging space matched with the movable knife is formed between two adjacent long fixed knives. The cutting knife and the long fixed knife are gap matched, and the movable knife and the short fixed knife are gap matched. When the knife roller rotates, the movable knife performs a shearing motion in the engaging space, thereby forming a cutting and crushing effect on part of the material away from the roller shaft; and the cutting knife performs a shearing motion relative to the long fixed knife, thereby forming a cutting and crushing effect on part of the material close to the roller shaft; the entire single-axis bag opener effectively takes into account the structural strength and cutting and crushing efficiency of the fixed knife.

Description

Technical Field

[0001] The invention relates to the technical field of bag openers, in particular to a single-axis bag opener. Background Art

[0002] A common single-axis bag opener includes a chassis, a fixed knife assembly, a knife roller and a power device. The power device drives the knife roller to rotate, and the moving knife on the knife roller cooperates with the fixed knife assembly to cut and crush the material, thereby achieving the purpose of breaking up the material and opening the bag.

[0003] For example, a Chinese invention patent application with application publication number CN110949803A and application publication date 2020.04.03 discloses a household garbage bag breaking machine, and specifically discloses that the bag breaking machine includes a body and a bag breaking module, the bag breaking module includes a feed inlet, a bag breaking roller, a moving knife seat, a moving knife, a motor, a fixed knife and a fixed knife holder, a bag breaking roller is installed in the body below the feed inlet, a number of moving knife seats are evenly distributed on the circumference of the bag breaking roller, a moving knife is installed on the moving knife seat, a fixed knife holder is provided on one side of the bag breaking roller, a fixed knife cooperating with the moving knife is installed on the inner side of the fixed knife holder, a baffle is provided on the upper part of the other side of the bag breaking roller, and the upper end of the baffle is connected to the feed inlet. Bags and packaging materials fall from the feed inlet to the baffle, and the moving knife and the fixed knife cooperate to break the bag.

[0004] The bale breaking machine in the prior art uses a fixed blade holder to fix the fixed blade, and uses the rotation of the fixed blade holder and the machine body to make large materials fall directly; in addition, the fixed blade is also directly fixed on the side wall of the chassis. Regardless of the assembly form of the fixed blade installed in the chassis, the fixed blade and the moving blade will be subjected to a large impact force when cutting materials. In order to ensure the structural strength requirements of the fixed blade, if the size of the fixed blade is increased, the number of fixed blades will be reduced accordingly, thereby reducing the efficiency of cutting and crushing.

[0005] In summary, the existing bag opener cannot take into account both the structural strength of the fixed knife and the cutting and crushing efficiency. Summary of the invention

[0006] In order to solve the above problems, the purpose of the present invention is to provide a single-axis bag opener to solve the problem that the existing bag openers cannot take into account both the structural strength and cutting and crushing efficiency of the fixed knife.

[0007] The technical solution of the single-axis bag opening machine of the present invention is:

[0008] The single-axis bag opening machine comprises a chassis, a knife roller and a fixed knife assembly, wherein the knife roller comprises a roller shaft, a movable knife seat and a movable knife, wherein the roller shaft is rotatably mounted in the chassis, the movable knife seat is axially spaced on the roller shaft, the movable knife is mounted on the movable knife seat, and a cutting knife is protruding from the surface of the roller shaft;

[0009] The fixed knife assembly includes a fixed knife seat arranged parallel to the axial direction, a long fixed knife and a short fixed knife installed on the fixed knife seat, the long fixed knife and the short fixed knife are alternately arranged along the length direction of the fixed knife seat, the long fixed knife is protruded from the fixed knife seat toward the side close to the roller shaft, the interval between two adjacent long fixed knives forms a bite space that cooperates with the movable knife, the cutting knife is in clearance with the long fixed knife, and the movable knife is in clearance with the short fixed knife.

[0010] Beneficial effects: The fixed knife assembly includes long fixed knives and short fixed knives alternately arranged along its length direction. The long fixed knife is protruded toward the side close to the roller shaft, and a bite space cooperating with the movable knife is formed between two adjacent long fixed knives. When the knife roller rotates, the movable knife on the knife roller performs a shearing movement in the bite space, and the clearance between the short fixed knife and the movable knife is used to form a cutting and crushing effect on part of the material away from the roller shaft. The cutting knife on the knife roller performs a shearing movement relative to the long fixed knife, and the clearance between the long fixed knife and the cutting knife is used to form a cutting and crushing effect on part of the material close to the roller shaft.

[0011] With the cooperation between the moving knife of the knife roller and the short fixed knife of the fixed knife assembly, the end cutting and crushing of the part of the material far away from the roller shaft is mainly formed. The radial size of the moving knife is large and the cutting line speed is greater. The overhanging protrusion size of the short fixed knife is small, and it has a higher structural strength to withstand the impact force; with the cooperation between the cutting knife of the knife roller and the long fixed knife of the fixed knife assembly, the root cutting and crushing of the part of the material close to the roller shaft is mainly formed. The radial size of the cutting knife is small and the cutting line speed is smaller. Even if the overhanging protrusion size of the long fixed knife is large, the auxiliary cutting part can reliably withstand the weak impact force caused by the cutting knife. The short fixed knife has a high structural strength, corresponding to the large amount of cutting and crushing. The long fixed knife has a low structural strength, corresponding to the small amount of cutting and crushing. It mainly forms a cutting effect on the root material. The entire single-axis bag opener effectively takes into account the structural strength and cutting and crushing efficiency of the fixed knife.

[0012] Furthermore, the fixed knife seat includes a first seat body and a second seat body arranged in parallel, the first seat body and the second seat body are alternately arranged parallel to the axial direction, the long fixed knife is fixedly mounted on the upper side of the first seat body, the short fixed knife is fixedly mounted on the upper side of the second seat body, the outer side surface of the first seat body is flush with the outer side surface of the second seat body and are respectively fixedly connected to the chassis.

[0013] Furthermore, a fixing plate is provided at the lower part of the first base body and the second base body, and a reinforcing plate is provided between the lower side of the fixing plate and the inner wall of the chassis.

[0014] Furthermore, the first seat body is a quadrilateral block with a width narrowing downward, the reinforcing plate is a triangular plate, and the hypotenuse of the reinforcing plate is arranged on the same side as the inner edge of the first seat body.

[0015] Furthermore, bolt holes are provided on the outer side surface of the first base body and the outer side surface of the second base body, and fastening bolts connected to the chassis are installed in the bolt holes.

[0016] Furthermore, the upper side surface of the first seat body and the upper side surface of the second seat body are respectively arranged obliquely downward in the direction close to the roller shaft, the inner edge of the short fixed knife and the central axis of the roller shaft are in the same horizontal plane, and the inner edge of the long fixed knife is lower than the central axis of the roller shaft.

[0017] Furthermore, the upper side surface of the first base body and the upper side surface of the second base body are provided with mounting holes, and the long fixed blade and the short fixed blade are provided with through holes for the connection bolts to pass through.

[0018] Furthermore, two fixed knife assemblies are provided, and the two fixed knife assemblies are respectively installed on opposite inner walls of the chassis, namely a first fixed knife assembly and a second fixed knife assembly, and the roller shaft is located in the middle position between the first fixed knife assembly and the second fixed knife assembly.

[0019] Furthermore, the first fixed knife assembly and the second fixed knife assembly have the same structure, the inclination angle of the long fixed knife of the first fixed knife assembly is smaller than the inclination angle of the long fixed knife of the second fixed knife assembly, and the inner edge of the long fixed knife of the second fixed knife assembly is lower than the inner edge of the long fixed knife of the first fixed knife assembly.

[0020] Furthermore, the chassis is provided with a feed hopper located on the feeding side of the knife roller, and an extrusion assembly is installed in the feed hopper. The extrusion assembly includes an extrusion drive and a pressing block slidably installed in the extrusion hopper, and the pressing block has an arc-shaped pressing surface matching the rotating outer contour of the knife roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional schematic diagram of a single-axis bag opener in a specific embodiment 1 of the single-axis bag opener of the present invention;

[0022] Figure 2 It is a top view schematic diagram of a single-axis bag opener in a specific embodiment 1 of the single-axis bag opener of the present invention;

[0023] Figure 3 It is a front view schematic diagram of a single-axis bag opener in a specific embodiment 1 of the single-axis bag opener of the present invention;

[0024] Figure 4 It is a three-dimensional schematic diagram of the fixed knife assembly in the specific embodiment 1 of the single-axis bag opening machine of the present invention;

[0025] Figure 5 It is a three-dimensional schematic diagram of another viewing angle of the fixed knife assembly in the specific embodiment 1 of the single-axis bag opening machine of the present invention;

[0026] Figure 6 It is a schematic diagram of the fixed knife assembly along the length direction in the specific embodiment 1 of the single-axis bag opening machine of the present invention.

[0027] In the figure: 1. chassis; 10. feed hopper; 11. extrusion assembly; 12. fastening bolts; 110. extrusion drive; 111. press block; 112. guide rail; 2. knife roller; 20. roller shaft; 21. movable knife seat; 22. movable knife; 23. cutting knife; 3. first fixed knife assembly; 31. long fixed knife; 310. through hole; 32. short fixed knife; 33. first seat body; 330. bolt hole; 331. mounting hole; 34. second seat body; 35. fixing plate; 36. reinforcing plate; 37. connecting bolts; 4. second fixed knife assembly; 5. driving motor; 6. reducer. DETAILED DESCRIPTION

[0028] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] The specific embodiment 1 of the single-axis bag opening machine of the present invention is as follows Figures 1 to 6 As shown, the single-axis bag opening machine includes a chassis 1, a knife roller 2 and a fixed knife assembly, wherein the knife roller 2 includes a roller shaft 20, a movable knife seat 21 and a movable knife 22, the roller shaft 20 is rotatably mounted in the chassis 1, the movable knife seat 21 is axially spaced on the roller shaft 20, the movable knife 22 is mounted on the movable knife seat 21, and a cutter 23 is protruding from the surface of the roller shaft 20; a driving motor 5 and a reducer 6 are provided outside the chassis 1, and the driving motor 5 transmits power to the knife roller 2 through the reducer 6. The fixed knife assembly includes a fixed knife seat arranged parallel to the axial direction, a long fixed knife 31 and a short fixed knife 32 installed on the fixed knife seat, the long fixed knife 31 and the short fixed knife 32 are alternately arranged along the length direction of the fixed knife seat, the long fixed knife 31 is protruding toward the side close to the roller shaft 20, and a bite space is formed between two adjacent long fixed knives 31 to cooperate with the movable knife 22, the cutter 23 is gap-matched with the long fixed knife 31, and the movable knife 22 is gap-matched with the short fixed knife 32.

[0030] The fixed knife assembly includes a long fixed knife 31 and a short fixed knife 32 alternately arranged along its length direction. The long fixed knife 31 is protruded from the fixed knife seat toward the side close to the roller shaft 20, and an engaging space for cooperating with the movable knife 22 is formed between two adjacent long fixed knives 31; when the knife roller 2 rotates, the movable knife 22 on the knife roller 2 performs a shearing movement in the engaging space, and the short fixed knife 32 is used to cooperate with the movable knife 22 in a clearance, so as to form a cutting and crushing effect on part of the material away from the roller shaft 20; and the cutting knife 23 on the knife roller 2 performs a shearing movement relative to the long fixed knife 31, and the long fixed knife 31 is used to cooperate with the cutting knife 23 in a clearance, so as to form a cutting and crushing effect on part of the material close to the roller shaft 20.

[0031] With the cooperation between the moving knife 22 of the knife roller 2 and the short fixed knife 32 of the fixed knife assembly, the end cutting and crushing of the part of the material far from the roller shaft 20 is mainly formed. The radial size of the moving knife 22 is large, the cutting line speed is greater, and the overhanging protrusion size of the short fixed knife 32 is small, and it has a higher structural strength to withstand the impact force; with the cooperation between the cutting knife 23 of the knife roller 2 and the long fixed knife 31 of the fixed knife assembly, the root cutting and crushing of the part of the material close to the roller shaft 20 is mainly formed. The radial size of the cutting knife 23 is small and the cutting line speed is smaller. Even if the overhanging protrusion size of the long fixed knife 31 is large, the auxiliary cutting part can reliably withstand the weak impact force caused by the cutting knife 23. The short fixed knife 32 has a high structural strength, corresponding to the large amount of cutting and crushing, and the long fixed knife 31 has a low structural strength, corresponding to the small amount of cutting and crushing, and mainly forms a cutting effect on the root of the material. The entire single-axis bag opening machine effectively takes into account the structural strength and cutting and crushing efficiency of the fixed knife.

[0032] In this embodiment, two fixed knife assemblies are provided, and the two fixed knife assemblies are respectively installed on the opposite inner walls of the chassis 1, and the two fixed knife assemblies are respectively the first fixed knife assembly 3 and the second fixed knife assembly 4, and the roller shaft 20 is located in the middle of the first fixed knife assembly 3 and the second fixed knife assembly 4. Correspondingly, the movable knife seat 21 is a rectangular block structure, and the movable knife seat 21 is provided with two assembly parts, and the two assembly parts are respectively the first assembly side surface and the second assembly side surface arranged perpendicular to the circumferential direction of the roller shaft 20, and the movable knife 22 is installed on both the first assembly side surface and the second assembly side surface.

[0033] The movable knife 22 is installed on the first assembly side and the second assembly side of the movable knife seat 21. When the knife roller 2 rotates forward and reversely, opposite cutting forces are formed respectively. When rotating forward, the knife roller 2 cooperates with the first fixed knife assembly 3 to form a forward cutting action, and when rotating reversely, the knife roller 2 cooperates with the second fixed knife assembly 4 to form a reverse cutting action. Moreover, different load adjustment structures are respectively embedded between the movable knife 22 on the first assembly side and the cylindrical surface of the roller shaft 20, and between the movable knife 22 on the second assembly side and the cylindrical surface of the roller shaft 20 to adjust the part where the movable knife 22 cuts the material, so that the knife roller 2 achieves different cutting effects when rotating forward and reversely, and the crushing functionality is better, which can be applied to the use requirements of mixed materials.

[0034] The first fixed knife assembly 3 and the second fixed knife assembly 4 have the same structure. The first fixed knife assembly 3 and the second fixed knife assembly 4 are collectively referred to as fixed knife assemblies, which will be described in detail below.

[0035] Taking the first fixed knife assembly 3 as an example, the fixed knife seat includes a first seat body 33 and a second seat body 34 arranged in parallel, the first seat body 33 and the second seat body 34 are alternately arranged parallel to the axial direction, the long fixed knife 31 is fixedly mounted on the upper side of the first seat body 33, the short fixed knife 32 is fixedly mounted on the upper side of the second seat body 34, the outer side of the first seat body 33 and the outer side of the second seat body 34 are flush and respectively fixedly connected to the chassis 1. The first seat body 33 and the second seat body 34 are fixed on the inner wall of the chassis 1, and the first seat body 33 plays a reliable supporting role for the long fixed knife 31 and the second seat body 34 plays a reliable supporting role for the short fixed knife 32.

[0036] Specifically, a fixing plate 35 is provided at the lower part of the first seat body 33 and the second seat body 34, and a reinforcing plate 36 is provided between the lower side of the fixing plate 35 and the inner wall of the chassis 1. The installation form of the fixing plate 35 and the reinforcing plate 36 ensures a secure assembly connection between the first seat body 33, the second seat body 34 and the chassis 1. Furthermore, the first seat body 33 is a quadrilateral block with a narrowed width downward, and the reinforcing plate 36 is a triangular plate, and the hypotenuse of the reinforcing plate 36 is arranged on the same side as the inner edge of the first seat body 33. The design of the quadrilateral block with a narrowed width prevents the inner side surface of the first seat body 33 from causing protruding interference, ensuring that the cutting knife 23 of the knife roller 2 can produce an effective shearing effect with the long fixed knife 31.

[0037] It should be noted that the outer side surface of the first seat body 33 is a vertical side surface, the inner side surface of the first seat body 33 extends obliquely downward and gradually approaches the vertical side surface, and the upper side surface of the first seat body 33 is used to install the long fixed knife 31; correspondingly, the outer side surface of the second seat body 34 is also a vertical side surface, the inner side surface of the second seat body 34 is parallel to the inner side surface of the first seat body 33, and the inner side surface of the first seat body 33 protrudes from the inner side surface of the second seat body 34. Similarly, the inner side surface of the second seat body 34 will not cause protruding interference, thereby ensuring that the movable knife 22 of the knife roller 2 can produce an effective shearing effect with the short fixed knife 32.

[0038] In order to simplify the assembly relationship between the fixed blade seat and the chassis 1, bolt holes 330 are provided on the outer side surface of the first seat body 33 and the outer side surface of the second seat body 34, and fastening bolts 12 connected to the chassis 1 are installed in the bolt holes 330. The first seat body 33 and the second seat body 34 are alternately fixed to the inner wall of the chassis 1 in parallel by the fastening bolts 12. In addition, mounting holes 331 are provided on the upper side surface of the first seat body 33 and the upper side surface of the second seat body 34, and through holes 310 for connecting bolts 37 to pass through are provided on the long fixed blade 31 and the short fixed blade 32. The long fixed blade 31 is fixed to the upper side surface of the first seat body 33, and the short fixed blade 32 is fixed to the upper side surface of the second seat body 34 by the connecting bolts 37.

[0039] In addition, when the inner edges of the long fixed blade 31 and the short fixed blade 32 are worn, the connecting bolts 37 can be removed to adjust the installation positions of the long fixed blade 31 and the short fixed blade 32, so that the outer edges of the long fixed blade 31 and the short fixed blade 32 are adjusted to the inner side, and the cutting can continue to cooperate with the knife roller 2. Moreover, the thickness of the inner part of the first seat body 33 is smaller than the width of the long fixed blade 31, so that there is a large gap between the first seat body 33 and the movable blade 22, ensuring that the cut material can fall and discharge smoothly, avoiding the problem of clamping the material and causing friction and wear due to the gap between the first seat body 33 and the movable blade 22 being too narrow.

[0040] In order to improve the bite effect of the knife roller 2, the upper side surface of the first seat body 33 and the upper side surface of the second seat body 34 are arranged obliquely downward in the direction close to the roller shaft 20, the inner edge of the short fixed knife 32 is in the same horizontal plane as the central axis of the roller shaft 20, and the inner edge of the long fixed knife 31 is lower than the central axis of the roller shaft 20. The long fixed knife 31 and the short fixed knife 32 extend obliquely downward, which can guide the material to enter the cutting position smoothly. The inner edge of the short fixed knife 32 is in the same horizontal plane as the central axis of the roller shaft 20, and the inner edge of the short fixed knife 32 and the moving knife 22 of the knife roller 2 form the best cutting effect. Moreover, the end cutting of the moving knife 22 occurs before the root cutting of the cutting knife 23, avoiding the outward expulsion of the material and improving the efficiency of cutting and crushing.

[0041] In order to make the knife roller 2 produce different cutting effects in forward and reverse rotation, the inclination angle of the long fixed knife 31 of the first fixed knife assembly 3 is smaller than the inclination angle of the long fixed knife of the second fixed knife assembly 4, and the inner edge of the long fixed knife of the second fixed knife assembly 4 is lower than the inner edge of the long fixed knife 31 of the first fixed knife assembly 3. Specifically, the long fixed knife 31 of the first fixed knife assembly 3 is inclined downward at a small angle, so that the amount of material bitten between the knife roller 2 and the first fixed knife assembly 3 is smaller when the knife roller 2 rotates forward, and the smaller load can generate a larger cutting and crushing force, which is suitable for the front-end bagging and breaking work; the long fixed knife of the second fixed knife assembly 4 is inclined downward at a large angle, so that the amount of material bitten between the knife roller 2 and the second fixed knife assembly 4 is larger when the knife roller 2 rotates reversely, and the larger load can generate a smaller cutting and crushing force, which is suitable for the rear-end fine grinding operation. Moreover, by adaptively adjusting the load adjustment structure on the knife roller 2, and then changing the biting load of the moving knife 22 of the knife roller 2 itself, the cutting and crushing performance of the entire single-axis bagging machine is optimally designed.

[0042] In addition, a feed hopper 10 is provided in the chassis 1 and is located on the feeding side of the knife roller 2. An extrusion assembly 11 is installed in the feed hopper 10. The extrusion assembly 11 includes an extrusion drive 110 and a pressing block 111 slidably installed in the extrusion hopper 10. The pressing block 111 has an arc-shaped pressing surface that matches the rotating outer contour of the knife roller 2. Specifically, a guide rail 112 extending obliquely downward is provided in the feed hopper 10. The pressing block 111 is guided and installed on the guide rail 112. The pressing block 111 is pushed by the extrusion drive 110 to extrude the material obliquely downward, thereby improving the bite effect of the whole machine.

[0043] In other specific embodiments of the single-axis bag opener of the present invention, in order to meet different usage requirements, only one fixed knife assembly can be set in the chassis, and a fixed cutting and crushing effect is formed by the fixed knife assembly and the unidirectional rotating knife roller, and the structure is simpler and more reliable. In addition, the first seat body and the second seat body can be designed as an integrated fixed knife seat structure, which simplifies the assembly operation between the fixed knife seat and the chassis.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A single-axis bag opening machine, characterized in that: It includes a chassis, a knife roller and a fixed knife assembly, wherein the knife roller includes a roller shaft, a movable knife seat and a movable knife, wherein the roller shaft is rotatably mounted in the chassis, the movable knife seat is axially spaced on the roller shaft, the movable knife is mounted on the movable knife seat, and a cutting knife is protruding from the surface of the roller shaft; The fixed knife assembly comprises a fixed knife seat arranged parallel to the axial direction, a long fixed knife and a short fixed knife installed on the fixed knife seat, the long fixed knife and the short fixed knife are alternately arranged along the length direction of the fixed knife seat, the long fixed knife is protruded from the fixed knife seat toward the side close to the roller shaft, the interval between two adjacent long fixed knives forms a bite space matched with the movable knife, the cutting knife is gap matched with the long fixed knife, and the movable knife is gap matched with the short fixed knife; The fixed knife seat comprises a first seat body and a second seat body arranged in parallel, the first seat body and the second seat body are alternately arranged parallel to the axial direction, the long fixed knife is fixedly mounted on the upper side of the first seat body, the short fixed knife is fixedly mounted on the upper side of the second seat body, the outer side surface of the first seat body and the outer side surface of the second seat body are flush and respectively fixedly connected to the chassis; A fixing plate is provided at the lower part of the first seat body and the second seat body, and a reinforcing plate is provided between the lower side of the fixing plate and the inner wall of the chassis; The first seat body is a quadrilateral block with a width narrowing downward, the reinforcing plate is a triangular plate, and the hypotenuse of the reinforcing plate is arranged on the same side as the inner edge of the first seat body; The upper side surface of the first seat body and the upper side surface of the second seat body are respectively arranged obliquely downward in a direction close to the roller shaft, the inner edge of the short fixed knife and the central axis of the roller shaft are in the same horizontal plane, and the inner edge of the long fixed knife is lower than the central axis of the roller shaft; The two fixed knife assemblies are respectively mounted on opposite inner walls of the chassis, namely a first fixed knife assembly and a second fixed knife assembly, and the roller shaft is located in the middle of the first fixed knife assembly and the second fixed knife assembly; The first fixed knife assembly and the second fixed knife assembly have the same structure, the inclination angle of the long fixed knife of the first fixed knife assembly is smaller than the inclination angle of the long fixed knife of the second fixed knife assembly, and the inner edge of the long fixed knife of the second fixed knife assembly is lower than the inner edge of the long fixed knife of the first fixed knife assembly; The long fixed blade of the first fixed blade assembly is tilted downward at a small angle, and the amount of material bitten between the first fixed blade assembly and the blade roller when the blade roller rotates forward is small, and the small load capacity is suitable for the front-end bagging and scattering work; the long fixed blade of the second fixed blade assembly is tilted downward at a large angle, and the amount of material bitten between the second fixed blade assembly and the blade roller when the blade roller rotates backward is large, and the large load capacity is suitable for the back-end fine grinding work; The chassis is provided with a feed hopper located on the feeding side of the knife roller, and an extrusion assembly is installed in the feed hopper. The extrusion assembly includes an extrusion drive and a pressing block slidably installed in the feed hopper, and the pressing block has an arc-shaped pressing surface matching the rotating outer contour of the knife roller.

2. The single-axis bag opening machine according to claim 1 is characterized in that: Bolt holes are provided on the outer side surface of the first base body and the outer side surface of the second base body, and fastening bolts connected to the chassis are installed in the bolt holes.

3. The single-axis bag opening machine according to claim 1 is characterized in that: The upper side surface of the first base body and the upper side surface of the second base body are provided with mounting holes, and the long fixed blade and the short fixed blade are provided with through holes for connecting bolts to pass through.

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