An on-line homogenizing and crushing device for a waste gypsum board recycling system

Abstract

The present invention discloses an on-line homogenizing and crushing device for a waste gypsum board recycling system, which includes a front board crushing unit arranged on the forward conveying section of the turning conveying mechanism and used for generating cutting lines on the facing paper of the moving waste gypsum board and cutting the moving waste gypsum board by extrusion; a rear board crushing unit arranged on the rearward conveying section of the turning conveying mechanism and used for generating mutually perpendicular cutting lines on the facing paper of the moving waste gypsum board and cutting the moving waste gypsum board by extrusion; the waste gypsum board forms a plurality of cut gypsum board fragments after passing through the front board crushing unit and the rear board crushing unit; by combining the cutting work of the facing paper and the extrusion and crushing work, the present invention forms a plurality of independent gypsum board fragments through the extrusion of the gypsum board core and the cutting of the facing paper for the complete gypsum board material, so there is no adhesion between two gypsum board blocks, which is convenient for separating the gypsum core from the facing paper in the later stage.

Description

Technical Field

[0001] The present invention relates to the technical field of gypsum board production, and particularly relates to an on-line homogeneous crushing device for a waste gypsum board recycling system. Background Art

[0002] Both the front and back of a gypsum board with facing paper are covered with facing paper. 80% of the strength of the gypsum board comes from the gypsum facing paper. Without the facing paper, the gypsum core has almost no strength and is very easy to break. Therefore, when recycling waste gypsum boards, it is necessary to separate the facing paper from the gypsum core and reuse them separately. The existing waste gypsum board crushing device processes waste gypsum boards in the following way: first, it is crushed and then ground, so that the paper after crushing is separated from the gypsum.

[0003] Since the facing paper of the gypsum board has high tensile strength and can meet the strength requirements of a high-grade paper-faced gypsum board production line, when crushing waste gypsum boards, even if the gypsum core is broken, the facing paper may still be relatively intact. Therefore, the crushing operation may also cause the facing paper to wrap the gypsum core, resulting in the gypsum core being difficult to collect and the separation time between the gypsum core and the facing paper being long. Summary of the Invention

[0004] The purpose of the present invention is to provide an on-line homogeneous crushing device for a waste gypsum board recycling system to solve the technical problem in the prior art that the crushing operation may also cause the facing paper to wrap the gypsum core, resulting in the gypsum core being difficult to collect and the separation time between the gypsum core and the facing paper being long.

[0005] To solve the above technical problem, the present invention specifically provides the following technical solutions:

[0006] An on-line homogeneous crushing device for a waste gypsum board recycling system, comprising:

[0007] A turning and conveying mechanism for turning and conveying waste gypsum boards in the length direction and the width direction respectively;

[0008] A front plate crushing unit arranged on the pre-turning conveying section of the turning and conveying mechanism for generating cutting lines on the facing paper of the moving waste gypsum board and cutting the moving waste gypsum board by extrusion;

[0009] A rear plate crushing unit arranged on the post-turning conveying section of the turning and conveying mechanism for generating mutually perpendicular cutting lines on the facing paper of the moving waste gypsum board and cutting the moving waste gypsum board by extrusion;

[0010] The front gypsum board crushing unit and the rear gypsum board crushing unit generate cutting lines on the facing paper of the waste gypsum board that are the same as the conveying direction, and the front gypsum board crushing unit and the rear gypsum board crushing unit exert extrusion perpendicular to the conveying direction on the facing paper of the waste gypsum board. The waste gypsum board passes through the front gypsum board crushing unit and the rear gypsum board crushing unit to form multiple cut gypsum board fragments.

[0011] As a preferred embodiment of the present invention, the rear gypsum board crushing unit cuts along the slitting marks of the waste gypsum board so that the waste gypsum board forms multiple slitted panels after extrusion;

[0012] And the rear gypsum board crushing unit extrudes the board along the cutting lines formed by the front gypsum board crushing unit to form independently cut gypsum board fragments from the multiple slitted panels.

[0013] As a preferred embodiment of the present invention, the front gypsum board crushing unit includes multiple first cutting knife groups arranged on the forward turning conveying line, and a first extrusion roller group arranged perpendicular to the conveying direction of the forward turning conveying line. The installation directions of the multiple first cutting knife groups are perpendicular to the conveying direction of the forward turning conveying line, and the first extrusion roller group is downstream of the first cutting knife group.

[0014] As a preferred embodiment of the present invention, the extrusion depth of the first extrusion roller group is the same as the thickness of the waste gypsum board, and the upper surface of the lower roller path of the first extrusion roller group is flush with the upper surface of the forward turning conveying line. The first extrusion roller group forms several segmented boards from the waste gypsum board by rotational extrusion;

[0015] Wherein, the extrusion grooves of the first extrusion roller group are perpendicular to the cutting lines of the first cutting knife group.

[0016] As a preferred embodiment of the present invention, the first cutting knife group includes a cross beam plate arranged above the forward turning conveying line, and multiple hanging rods movably installed on the cross beam plate and evenly distributed. One end of the hanging rod is movably hinged on the cross beam plate, and the other end of the hanging rod is installed with a detachable upper blade. And the hanging rod is inclined downward from the movable hinge position. Multiple evenly distributed lower blades are installed on the forward turning conveying line. The upper blade and the lower blade of the same group are in the same vertical plane, and the upper blade and the lower blade of the same group form a cutting line on the upper and lower surfaces of the waste gypsum board.

[0017] As a preferred embodiment of the present invention, the distance between the upper blade and the lower blade in the initial state is less than the thickness of the waste gypsum board. An extrusion spring is provided at the connection position between the hanging rod and the cross beam plate. The hanging rod always closely adheres to the upper surface of the waste gypsum board under the action of the rebounding force and its own weight of the extrusion spring.

[0018] As a preferred embodiment of the present invention, the first extrusion roll group includes an upper extrusion roll and a lower extrusion roll disposed between the forward transfer lines. The waste gypsum board is fed into the gap between the upper extrusion roll and the lower extrusion roll under the drive of the forward transfer lines for extrusion treatment;

[0019] The upper extrusion roll and the lower extrusion roll rotate in opposite directions, and the waste gypsum board is transferred to the forward transfer lines under the drive of the upper extrusion roll and the lower extrusion roll. A plurality of uniformly distributed raised strips are provided on the side curved surfaces of the upper extrusion roll and the lower extrusion roll, and the positions of the raised strips on the upper extrusion roll and the lower extrusion roll exactly correspond. The waste gypsum board is extruded by the raised strips to form several segmented plates.

[0020] As a preferred embodiment of the present invention, the post-breaking unit includes a plurality of second cutting knife groups disposed on the rearward transfer line, and a second extrusion roll group disposed perpendicular to the conveying direction of the rearward transfer line. The installation directions of the plurality of second cutting knife groups are perpendicular to the conveying direction of the rearward transfer line, and the second extrusion roll group is downstream of the second cutting knife group.

[0021] As a preferred embodiment of the present invention, the second cutting knife group forms a cutting line along the extrusion trace formed by the first extrusion roll group to cut the waste gypsum board into the cut panels. The second cutting knife group includes a plurality of shear-shaped cutting knives disposed on the rearward transfer line, and the cutting edges of the shear-shaped cutting knives face the waste gypsum board;

[0022] Wherein, the distance between two adjacent shear-shaped cutting knives is the same as the distance between two extrusion grooves formed by the first extrusion roll group.

[0023] As a preferred embodiment of the present invention, the second extrusion roll group extrudes the cut panels along the cutting line of the first cutting knife group to extrude each cut panel into gypsum board fragments.

[0024] The two vertically distributed extrusion rolls of the second extrusion roll group rotate in opposite directions, and the protrusions of the two vertically distributed extrusion rolls simultaneously extrude the upper and lower surfaces of the cut panels to break the cut panels along the cutting line of the first cutting knife group to form gypsum board fragments.

[0025] The present invention has the following beneficial effects compared with the prior art:

[0026] The gypsum board crushing work of the present invention includes the cutting work of the facing paper. By combining the cutting work of the facing paper and the extrusion and crushing work, the complete gypsum board is formed into multiple independent gypsum board fragments through the operations of squeezing the gypsum board core and cutting the facing paper. Therefore, there is no adhesion between two gypsum board blocks, which facilitates the subsequent separation of the gypsum core from the facing paper. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only exemplary. For those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.

[0028] Figure 1 It is a top view structural schematic diagram of the online homogeneous crushing device provided by an embodiment of the present invention;

[0029] Figure 2 It is a side view structural schematic diagram of the first cutting knife group provided by an embodiment of the present invention;

[0030] Figure 3 It is a side view structural schematic diagram of the first extrusion roller group provided by an embodiment of the present invention;

[0031] Figure 4 It is a side view structural schematic diagram of the post-crushing plate unit provided by an embodiment of the present invention.

[0032] The reference numerals in the drawings are respectively represented as follows:

[0033] 11 - Front crushing plate unit; 12 - Post-crushing plate unit;

[0034] 111 - First cutting knife group; 112 - First extrusion roller group;

[0035] 1111 - Cross beam plate; 1112 - Hanging rod; 1113 - Upper blade; 1114 - Lower blade; 1115 - Extrusion spring;

[0036] 1121 - Upper extrusion roller; 1122 - Lower extrusion roller; 1123 - Protruding strip;

[0037] 121 - Second cutting knife group; 122 - Second extrusion roller group;

[0038] 1211 - Scissor-shaped cutting knife. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0040] As Figure 1 shown, the present invention provides an on-line homogenizing and crushing device for a waste gypsum board recycling system, including: a steering conveying mechanism, a front board crushing unit 11, and a rear board crushing unit 12.

[0041] The steering conveying mechanism conveys the waste gypsum board in the length direction and the width direction respectively for steering.

[0042] The front board crushing unit 11 is arranged on the forward conveying section of the steering conveying mechanism, and is used for generating cutting lines on the facing paper of the moving waste gypsum board, and cutting the moving waste gypsum board by an extrusion method.

[0043] The rear board crushing unit 12 is arranged on the rear conveying section after steering of the steering conveying mechanism, and is used for generating mutually perpendicular cutting lines on the facing paper of the moving waste gypsum board, and cutting the moving waste gypsum board by an extrusion method.

[0044] The front board crushing unit 11 and the rear board crushing unit 12 generate cutting lines on the facing paper of the waste gypsum board that are the same as the conveying direction, and the front board crushing unit 11 and the rear board crushing unit 12 generate extrusion on the facing paper of the waste gypsum board that is perpendicular to the conveying direction. The waste gypsum board forms a plurality of cut gypsum board fragments after passing through the front board crushing unit 11 and the rear board crushing unit 12.

[0045] Specifically, the rear board crushing unit 12 cuts along the cutting marks of the waste gypsum board, so that the waste gypsum board forms multiple cut panels after extrusion, and the rear board crushing unit 12 extrudes the board along the cutting lines formed by the front board crushing unit 11 to form independently cut gypsum board fragments from the multiple cut panels.

[0046] In this embodiment, by cutting the facing paper and then cutting the waste gypsum board along the cutting marks, independently disassembled gypsum board fragments are formed, rather than disorderly crushing the gypsum board. Therefore, when the gypsum board fragments obtained in this embodiment are immersed in water, they are easily dissolved, so as to separate the gypsum core from the facing paper.

[0047] The specific implementation method is: using the front board crushing unit 11 to form cutting lines on the upper and lower surfaces of the gypsum board, and at the same time extruding the gypsum board from the upper and lower surfaces to break the internal gypsum core, and the fracture direction is vertically distributed with respect to the cutting lines.

[0048] After the extruded gypsum board is subjected to turning treatment, the broken gypsum core is connected by the facing paper to form an integral body. The facing paper between the gypsum cores is cut, and the gypsum board is cut into multiple split panels. Then, the gypsum board is extruded along the cutting line formed in the first step, and the gypsum core at the cutting line position is broken, so that the gypsum board can be cut into independent gypsum board fragments. Therefore, the gypsum core and the facing paper of each gypsum board fragment are in a broken state, which is convenient for separating the facing paper from the gypsum core in the later stage.

[0049] As a preferred embodiment of this embodiment, the front broken board unit 11 includes a plurality of first cutting knife groups 111 arranged on the pre-turning conveying line, and a first extrusion roller group 112 arranged perpendicular to the conveying direction of the pre-turning conveying line. The installation directions of the plurality of first cutting knife groups 111 are perpendicular to the conveying direction of the pre-turning conveying line, and the first extrusion roller group 112 is located downstream of the first cutting knife group 111.

[0050] The extrusion depth of the first extrusion roller group 112 is the same as the thickness of the waste gypsum board, and the upper surface of the lower roller path of the first extrusion roller group 112 is flush with the upper surface of the pre-turning conveying line. The first extrusion roller group 112 forms several segmented plates by rotating and extruding the waste gypsum board;

[0051] Among them, the extrusion grooves of the first extrusion roller group 112 are perpendicular to the cutting lines of the first cutting knife group 111.

[0052] In this embodiment, assuming that the length direction of the gypsum board is parallel to the pre-turning conveying line, a plurality of parallel cutting lines are formed in the length direction of the gypsum board by using the first cutting knife group 111. During the conveying process of the gypsum board, the first extrusion roller group 112 forms a plurality of extrusion grooves in the width direction of the gypsum board, and the gypsum core breaks under the extrusion action. After being processed by the front broken board unit 11, rectangular cutting units are formed on the waste gypsum board, but at this time, it is still a complete gypsum board under the connection of the facing paper.

[0053] Specifically, as Figure 2 and Figure 3 shown, the first cutting knife group 111 includes a cross beam plate 1111 arranged above the pre-turning conveying line, and a plurality of hanging rods 1112 that are movably installed on the cross beam plate 1111 and evenly distributed. One end of the hanging rod 1112 is movably hinged on the cross beam plate 1111, and the other end of the hanging rod 1112 is installed with a detachable upper blade 1113. The hanging rod 1112 is inclined downward from the movable hinge position. A plurality of evenly distributed lower blades 1114 are installed on the pre-turning conveying line. The same group of upper blades 1113 and lower blades 1114 are in the same vertical plane, and the same group of upper blades 1113 and lower blades 1114 form a cutting line on the upper and lower surfaces of the waste gypsum board.

[0054] The distance between the upper blade 1113 and the lower blade 1114 in the initial state is less than the thickness of the waste gypsum board. An extrusion spring 1115 is provided at the connection position between the hanging rod 1112 and the cross beam plate 1111. The hanging rod 1112 always clings to the upper surface of the waste gypsum board under the action of the rebound force of the extrusion spring 1115 and its own weight.

[0055] When the waste gypsum board moves and is conveyed on the surface of the pre-rotation conveying line, the upper surface of the waste gypsum board pushes the upper blade 1113 to rotate at a certain angle. However, due to the rebound force of the extrusion spring 1115 and its own weight of the hanging rod 1112, the upper blade 1113 always clings to the upper surface of the waste gypsum board. Therefore, the facing paper cracks under the cutting action of the upper blade 1113 and the lower blade 1114, forming a cutting line.

[0056] The first extrusion roller group 112 includes an upper extrusion roller 1121 and a lower extrusion roller 1122 arranged between the pre-rotation conveying lines. The waste gypsum board is fed into the gap between the upper extrusion roller 1121 and the lower extrusion roller 1122 under the drive of the pre-rotation conveying line for extrusion treatment.

[0057] The rotation directions of the upper extrusion roller 1121 and the lower extrusion roller 1122 are opposite, and the waste gypsum board is transferred to the pre-rotation conveying line under the drive of the upper extrusion roller 1121 and the lower extrusion roller 1122. A plurality of uniformly distributed raised strips 1123 are provided on the side curved surfaces of the upper extrusion roller 1121 and the lower extrusion roller 1122, and the positions of the raised strips 1123 of the upper extrusion roller 1121 and the lower extrusion roller 1122 exactly correspond. The waste gypsum board is extruded by the raised strips 1123 to form several segmented plates.

[0058] The waste gypsum board is fed into the upper extrusion roller 1121 and the lower extrusion roller 1122 after being cut by the upper blade 1113 and the lower blade 1114. The upper extrusion roller 1121 and the lower extrusion roller 1122 use the raised strips 1123 to extrude the gypsum core of the waste gypsum board, causing the gypsum core to break and form several segmented plates. At this time, the entire gypsum board is still a whole board due to the effect of the facing paper.

[0059] As Figure 1 and Figure 4 shown, the post-breaking unit 12 includes a plurality of second cutting knife groups 121 arranged on the post-rotation conveying line, and a second extrusion roller group 122 arranged perpendicular to the conveying direction of the post-rotation conveying line. The installation directions of the plurality of second cutting knife groups 121 are perpendicular to the conveying direction of the post-rotation conveying line, and the second extrusion roller group 122 is downstream of the second cutting knife group 121.

[0060] The second cutting knife group 121 forms a cutting line along the extrusion trace formed by the first extrusion roller group 112 to cut the waste gypsum board into sub-cut panels. The second cutting knife group 121 includes a plurality of shearing knives 1211 arranged on the post-turning conveying line, and the blades of the shearing knives 1211 face the waste gypsum board.

[0061] Among them, the distance between two adjacent shearing knives 1211 is the same as the distance between two extrusion grooves formed by the first extrusion roller group 112.

[0062] The waste gypsum board turns and moves to the post-turning conveying line. At this time, the width direction of the gypsum board is the same as the conveying direction of the post-turning conveying line. The second cutting knife group 121 cuts the facing paper along the fracture direction of the gypsum core, so that at this time, the gypsum board forms a plurality of sub-cut panels distributed in parallel.

[0063] In addition, in this embodiment, the extrusion of the waste gypsum board by the first extrusion roller group 112 may cause some damage to the facing paper. At this time, if it is cut by a blade, the blade will catch the broken position, affecting the smoothness of the facing paper cutting. Therefore, using the shearing knife 1211 can improve the processability.

[0064] Then the second extrusion roller group 122 extrudes the sub-cut panels along the cutting line of the first cutting knife group 111 to extrude each sub-cut panel into gypsum board fragments.

[0065] The rotation directions of the two vertically distributed extrusion rollers of the second extrusion roller group 122 are opposite, and the protrusions of the two vertically distributed extrusion rollers simultaneously extrude the upper and lower surfaces of the sub-cut panel to break the sub-cut panel along the cutting line of the first cutting knife group 111 to form gypsum board fragments.

[0066] Therefore, in this embodiment, the crushing work of the gypsum board includes the cutting work of the facing paper. Most of the existing gypsum board crushing devices mostly use the existing extrusion crushing method. Due to its relatively high strength, the facing paper cannot be completely broken in the existing extrusion crushing method, resulting in the crushed gypsum core still being adhered together by the facing paper. In this embodiment, by combining the cutting work of the facing paper and the extrusion crushing work, a plurality of independent gypsum board fragments are generated. Therefore, there is no adhesion between two gypsum board blocks, which is convenient for separating the gypsum core from the facing paper later.

[0067] The above embodiments are only exemplary embodiments of the present application and are not used to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements within the essence and protection scope of the present application, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present application.

Claims

1. An on-line homogenizing and crushing device for a waste gypsum board recycling system, characterized in that Including: A steering and conveying mechanism for steering and conveying waste gypsum boards in the length direction and width direction respectively; A front board-breaking unit (11) arranged on the pre-steering conveying section of the steering and conveying mechanism, used to generate cutting lines on the facing paper of the moving waste gypsum board and cut the moving waste gypsum board by extrusion; A rear board-breaking unit (12) arranged on the post-steering conveying section of the steering and conveying mechanism, used to generate mutually perpendicular cutting lines on the facing paper of the moving waste gypsum board and cut the moving waste gypsum board by extrusion; The front board-breaking unit (11) and the rear board-breaking unit (12) generate cutting lines on the facing paper of the waste gypsum board that are the same as the conveying direction, and the front board-breaking unit (11) and the rear board-breaking unit (12) generate extrusion perpendicular to the conveying direction on the facing paper of the waste gypsum board. The waste gypsum board forms multiple cut gypsum board fragments after passing through the front board-breaking unit (11) and the rear board-breaking unit (12); The front board-breaking unit (11) includes a plurality of first cutting knife groups (111) arranged on the pre-steering conveying line, and a first extrusion roller group (112) arranged perpendicular to the conveying direction of the pre-steering conveying line. The installation directions of the plurality of first cutting knife groups (111) are arranged perpendicular to the conveying direction of the pre-steering conveying line, and the first extrusion roller group (112) is downstream of the first cutting knife group (111); The first cutting knife group (111) includes a cross beam plate (1111) arranged above the pre-steering conveying line, and a plurality of hanging rods (1112) movably installed on the cross beam plate (1111) and evenly distributed. One end of the hanging rod (1112) is movably hinged on the cross beam plate (1111), and the other end of the hanging rod (1112) is installed with a detachable upper blade (1113). The hanging rod (1112) is inclined downward from the movable hinge position. A plurality of evenly distributed lower blades (1114) are installed on the pre-steering conveying line. The upper blades (1113) and the lower blades (1114) of the same group are in the same vertical plane, and the upper blades (1113) and the lower blades (1114) of the same group form cutting lines on the upper and lower surfaces of the waste gypsum board; The rear board-breaking unit (12) includes a plurality of second cutting knife groups (121) arranged on the post-steering conveying line, and a second extrusion roller group (122) arranged perpendicular to the conveying direction of the post-steering conveying line. The installation directions of the plurality of second cutting knife groups (121) are arranged perpendicular to the conveying direction of the post-steering conveying line, and the second extrusion roller group (122) is downstream of the second cutting knife group (121).

2. The on-line homogeneous crushing device of a waste gypsum board recycling system according to claim 1, characterized in that The rear board-breaking unit (12) cuts along the cutting marks of the waste gypsum board so that the waste gypsum board forms multiple cut panels after extrusion; And the rear gypsum board crushing unit (12) extrudes the gypsum board along the cutting line formed by the front gypsum board crushing unit (11), and forms the multiple cut panels into independently cut gypsum board fragments.

3. The on-line homogeneous crushing device of a waste gypsum board recycling system according to claim 1, characterized in that the extrusion depth of the first extrusion roller set (112) is the same as the thickness of the waste gypsum board, and the upper surface of the lower roller path of the first extrusion roller set (112) is flush with the upper surface of the forward transfer line. The first extrusion roller set (112) forms several segmented gypsum boards by rotating extrusion; wherein, the extrusion grooves of the first extrusion roller set (112) are perpendicular to the cutting lines of the first cutting knife set (111).

4. The on-line homogeneous crushing device of a waste gypsum board recycling system according to claim 1, characterized in that the distance between the upper blade (1113) and the lower blade (1114) in the initial state is less than the thickness of the waste gypsum board. An extrusion spring (1115) is provided at the connection position between the hanging rod (1112) and the cross beam plate (1111). The hanging rod (1112) always clings to the upper surface of the waste gypsum board under the action of the rebound force and self-weight of the extrusion spring (1115).

5. The on-line homogeneous crushing device of a waste gypsum board recycling system according to claim 1, characterized in that the first extrusion roller set (112) includes an upper extrusion roller (1121) and a lower extrusion roller (1122) arranged between the forward transfer lines. The waste gypsum board is fed into the gap between the upper extrusion roller (1121) and the lower extrusion roller (1122) under the drive of the forward transfer line for extrusion treatment; the upper extrusion roller (1121) and the lower extrusion roller (1122) rotate in opposite directions, and the waste gypsum board is transferred to the forward transfer line under the drive of the upper extrusion roller (1121) and the lower extrusion roller (1122). A plurality of uniformly distributed convex strips (1123) are provided on the side curved surfaces of the upper extrusion roller (1121) and the lower extrusion roller (1122), and the positions of the convex strips (1123) of the upper extrusion roller (1121) and the lower extrusion roller (1122) exactly correspond. The waste gypsum board forms several segmented gypsum boards after being extruded by the convex strips (1123).

6. The on-line homogeneous crushing device of a waste gypsum board recycling system according to claim 2, characterized in that the second cutting knife set (121) forms a cutting line along the extrusion marks formed by the first extrusion roller set (112) to cut the waste gypsum board into the cut panels. The second cutting knife set (121) includes a plurality of shear-shaped cutting knives (1211) arranged on the rearward transfer line, and the cutting edges of the shear-shaped cutting knives (1211) face the waste gypsum board; wherein, the distance between two adjacent shear-shaped cutting knives (1211) is the same as the distance between two extrusion grooves formed by the first extrusion roller set (112).

7. The on-line homogenizing and crushing device of a waste gypsum board recycling system according to claim 2, characterized in that the second extrusion roller set (122) extrudes the slit panel along the cutting line of the first cutting knife set (111) to extrude each slit panel into gypsum board fragments. The rotation directions of the two extrusion rollers distributed up and down in the second extrusion roller set (122) are opposite, and the protrusions of the two extrusion rollers distributed up and down simultaneously extrude the upper and lower surfaces of the slit panel to break the slit panel along the cutting line of the first cutting knife set (111) to form gypsum board fragments.

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