Plastic pulverizer

Abstract

The invention belongs to the technical field of plastic smashing, and discloses a plastic smashing machine which comprises a feeding box, the bottom end of the feeding box fixedly communicates with a shredding box, the bottom end of the shredding box fixedly communicates with a smashing box, a guide seat is fixedly installed in the middle of an inner cavity of the feeding box, a discharging opening is formed in the bottom end of the smashing box, and a discharging opening is formed in the bottom end of the smashing box. And machine bases are fixedly installed at the two ends of the outer side face of the smashing box, an auxiliary smashing assembly is movably installed in the shredding box, an auxiliary discharging assembly is arranged at the bottom end of the discharging port, and the top end of the auxiliary discharging assembly is connected with the auxiliary smashing assembly. According to the plastic crushing device, waste plastic can be automatically hammered and crushed after entering through the rotation process of plastic crushing by utilizing the device and through cooperation between the auxiliary discharging assembly and the auxiliary crushing assembly, the whole crushing process can be automatically completed before plastic crushing, the pressure during plastic crushing can be effectively reduced, the waste plastic is easy to crush, and the crushing efficiency is improved. The crushing efficiency is obviously improved.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic crushing, in particular to a plastic crushing machine. Background Art

[0002] Plastic shredding refers to the process of reducing the size or breaking waste plastics, waste plastic products or plastic scraps into pieces through mechanical force. In the process of plastic shredding, plastic shredders are often used to shred plastics. Conventional plastic shredders mainly achieve the shredding of plastics by mechanically driving the blades to rotate.

[0003] The core component of the plastic crusher currently used is a high-speed rotating crushing blade, which realizes the plastic crushing process through the crushing blade. However, since waste plastic is used in plastic crushing and the specifications of the waste debris are different, the waste debris is not processed into a more regular shape during crushing. The volume is large and irregular, and the overall crushing efficiency is low.

[0004] At the same time, when using a crushing knife or a crushing roller to crush plastic, due to the large processing volume, some plastic particles will remain at the discharge point after the plastic is crushed, causing a certain amount of blockage at the discharge port, seriously affecting the discharge efficiency, requiring shutdown for processing, and the overall efficiency is low. Summary of the invention

[0005] The object of the present invention is to provide a plastic crusher to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical scheme: a plastic shredder comprises a feed box, the bottom end of the feed box is fixedly connected to a shredding box, the bottom end of the shredding box is fixedly connected to a shredding box, a guide seat is fixedly installed in the middle of the inner cavity of the feed box, a discharge port is opened at the bottom end of the shredding box, both ends of the outer side surface of the shredding box are fixedly installed with a base, an auxiliary shredding assembly is movably installed inside the shredding box, an auxiliary discharging assembly is provided at the bottom end of the discharging port, the top of the auxiliary discharging assembly is connected with the auxiliary shredding assembly, a shredding roller is movably installed in the middle of the shredding box, a motor is fixedly installed on the rear side of the shredding box, a driving gear is fixedly installed on the output end of the motor, a driven gear is meshed and connected with the upper part of the driving gear, the driven gear is fixedly sleeved with the rear end of the auxiliary discharging assembly, the shredding box is provided with card slots on the left and right sides near the bottom, and through holes are opened at equal distances in the middle of the shredding box.

[0007] When crushing plastics, the waste plastics can be introduced through the feed box. At this time, after being guided by the guide seat, they can enter the shredder box from the left and right sides of the feed box and wait for crushing. At the same time, the collection box can be placed directly below the discharge port before crushing to complete the preparation work before plastic crushing.

[0008] As a further technical solution of the present invention, the auxiliary discharging assembly includes two symmetrically arranged front and rear transmission shafts, the two installation shafts respectively pass through the front and rear sides of the crushing box and are connected to the middle part of the crushing roller, and are fixedly sleeved between the outer side surface of the rear transmission shaft and the driven gear.

[0009] As a further technical solution of the present invention, a first connecting rod is fixedly sleeved on the outer side surface of the transmission shaft, and an end of the first connecting rod away from the transmission shaft is movably connected to a second connecting rod via a rotating shaft.

[0010] As a further technical solution of the present invention, a mounting shaft is movably sleeved on a side of the second connecting rod away from the first connecting rod, and the mounting shaft is fixedly connected to the auxiliary crushing assembly.

[0011] When crushing waste plastics, the motor can be turned on to drive the driving gear to rotate. At this time, the driven gear above rotates accordingly and drives the transmission shaft to rotate. At this time, the crushing roller located in the middle of the crushing box rotates accordingly. At the same time, when the transmission shaft rotates, the first connecting rod rotates accordingly, driving the second connecting rod to swing, and applying force to the auxiliary crushing assembly through the mounting shaft.

[0012] As a further technical solution of the present invention, the auxiliary crushing assembly includes a movable plate, and a first fixed seat is fixedly installed at the bottom end of the movable plate near the four corners, and an extension rod is fixedly installed at an equal distance in the middle of the bottom end of the movable plate, and the bottom end of the extension rod passes through the top of the shredder box and is fixedly connected to a hammer plate located inside the shredder box, and the front and rear ends of the movable plate are fixedly connected to the mounting shaft.

[0013] As a further technical solution of the present invention, one end of the first fixed seat away from the movable plate is movably connected to a connecting rod via a rotating shaft, one end of the connecting rod away from the first fixed seat is movably connected to a second fixed seat via a rotating shaft, and an extension seat is fixedly installed at the bottom end of the second fixed seat.

[0014] As a further technical solution of the present invention, the auxiliary crushing assembly also includes a cutting knife, which is movably connected to the slot, and the cutting knife is displaced left and right relative to the slot. The relatively distant ends of the two cutting knives are connected to the extension seat, and the relatively close ends of the two cutting knives are provided with matching serrated grooves.

[0015] With the continuous swing of the second connecting rod, an upward pulling force and a downward pushing force can be applied to the movable plate. At this time, the extension rod moves up and down accordingly, and at the same time drives the hammer plate at the bottom to move back and forth. When the hammer plate moves up and down, the waste plastic inside the shredder box can be initially hammered to complete the initial fragmentation process, so that the plastic particles are broken into smaller blocks, waiting for the subsequent crushing process.

[0016] By utilizing the rotating process of the device to crush plastics, and utilizing the cooperation between the auxiliary discharging component and the auxiliary crushing component, the waste plastics can be automatically hammered and crushed after entering. The entire crushing process can be automatically completed before the plastics are crushed, which can effectively reduce the pressure during plastic crushing, making the waste plastics easy to crush and significantly improving the crushing efficiency.

[0017] After the initial hammering and crushing of the waste plastic is completed, the waste plastic then enters between the two cutting knives. At the same time, the up and down reciprocating displacement of the movable plate can drive the connecting rod to deflect. When the movable plate moves up, the two connecting rods deflect toward the middle and apply a thrust to the cutting knives. At this time, the two cutting knives are relatively close to each other, and the plastic particles in the middle can be further sheared and shredded. When the movable plate moves down, the two connecting rods deflect away from the middle and apply a pulling force to the cutting knives. At this time, the two cutting knives are relatively far away, so that the waste plastic enters the interior of the two cutting knives. The reciprocating left and right displacement of the two cutting knives can periodically shear and shred the plastic, completing the crushing process again.

[0018] By utilizing the power used by the device during crushing, it can not only hammer and crush the waste plastics, but also shear and shred the plastics. The entire process is completed before crushing and is completed automatically. It can significantly reduce the size of the plastic during crushing, and transform the waste plastics into regular and smaller plastic plates, reducing the subsequent crushing pressure, thereby improving the overall crushing efficiency.

[0019] As a further technical solution of the present invention, the outer side surfaces of the installation shafts are fixedly sleeved with linkage frames, and a dredging tooth located directly below the discharge port is fixedly installed at the position between the bottom ends of the two linkage frames.

[0020] The plastic after shearing and shredding can enter the interior of the crushing box. At this time, due to the high-speed rotation of the crushing roller, the plastic inside the crushing box can be further crushed to complete the final crushing process. The crushed plastic can be discharged through the discharge port at the bottom. At the same time, when the movable plate moves back and forth up and down, it can synchronously drive the mounting shaft and the linkage frame to move back and forth up and down, and finally drive the dredging teeth to move back and forth up and down, and exert force on the inside of the discharge port, automatically dredge the inside of the discharge port to reduce blockage.

[0021] By further utilizing the rotational power during plastic crushing, the discharge port can be automatically unblocked while achieving initial hammering and shearing crushing of the plastic. The entire unblocking process can be completed automatically without stopping the machine for operation. It can be completed automatically during plastic crushing, reducing discharge blockage, improving discharge efficiency, and improving overall crushing efficiency.

[0022] The beneficial effects of the present invention are as follows: (1) The present invention utilizes a rotating device to crush plastics, and utilizes the coordination between an auxiliary discharging component and an auxiliary crushing component, so that the waste plastics can be automatically hammered and crushed after entering. The entire crushing process can be automatically completed before the plastics are crushed, which can effectively reduce the pressure during plastic crushing, making the waste plastics easy to crush and significantly improving the crushing efficiency.

[0023] (2) The present invention further utilizes the rotational power during plastic crushing to achieve the initial hammering and shearing crushing of the plastic and can also automatically clear the discharge port. The entire clearing process can be completed automatically without stopping the machine for operation. It can be completed automatically during plastic crushing, thereby reducing discharge blockage, improving discharge efficiency, and improving overall crushing efficiency.

[0024] (3) The present invention utilizes the power used by the device during pulverization to achieve not only the hammering and crushing of waste plastics, but also the shearing and shredding of plastics. The entire process is completed before pulverization and is completed automatically. The size of the plastic during pulverization can be significantly reduced, so that the waste plastics are transformed into regular and smaller plastic plates, reducing the subsequent pulverization pressure, thereby improving the overall pulverization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a front schematic diagram of the overall structure of the present invention; Figure 2 It is a back schematic diagram of the overall structure of the present invention; Figure 3 It is a schematic diagram of the coordination of the feed box, the shredding box and the crushing box structure of the present invention; Figure 4 It is a cross-sectional schematic diagram of the internal structure of the feed box, the shredding box and the crushing box of the present invention; Figure 5 It is a schematic diagram of the coordination of the auxiliary crushing component and the auxiliary discharging component structure of the present invention; Figure 6 It is a separate schematic diagram of the auxiliary crushing assembly structure of the present invention; Figure 7 It is a separate front view of the auxiliary crushing component structure of the present invention; Figure 8 It is a schematic diagram of the matching structure of the crushing roller and the auxiliary discharging assembly of the present invention; Fig. 9 It is a separate schematic diagram of the auxiliary discharging component structure of the present invention.

[0026] In the figure: 1. feed box; 2. guide seat; 3. shredder box; 4. crushing box; 5. through hole; 6. slot; 7. machine base; 8. auxiliary crushing assembly; 801. movable plate; 802. extension rod; 803. hammer plate; 804. first fixed seat; 805. second fixed seat; 806. connecting rod; 807. extension seat; 808. cutting knife; 9. crushing roller; 10. driving gear; 11. driven gear; 12. motor; 13. auxiliary discharging assembly; 131. transmission shaft; 132. first connecting rod; 133. second connecting rod; 134. mounting shaft; 135. linkage frame; 136. dredging teeth; 14. discharging port. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figures 1 to 9 As shown, in the embodiment of the present invention, a plastic pulverizer includes a feed box 1, the bottom end of the feed box 1 is fixedly connected to a shredding box 3, the bottom end of the shredding box 3 is fixedly connected to a crushing box 4, a guide seat 2 is fixedly installed in the middle of the inner cavity of the feed box 1, a discharge port 14 is provided at the bottom end of the crushing box 4, and a base 7 is fixedly installed at both ends of the outer side of the crushing box 4, an auxiliary crushing assembly 8 is movably installed inside the shredding box 3, an auxiliary discharging assembly 13 is provided at the bottom end of the discharge port 14, and the top of the auxiliary discharging assembly 13 is connected to the auxiliary crushing assembly 8, a crushing roller 9 is movably installed in the middle of the crushing box 4, a motor 12 is fixedly installed on the rear side of the crushing box 4, a driving gear 10 is fixedly installed on the output end of the motor 12, a driven gear 11 is meshed and connected above the driving gear 10, and the driven gear 11 is fixedly sleeved with the rear end of the auxiliary discharging assembly 13, and slots 6 are provided on the left and right sides near the bottom of the shredding box 3, and through holes 5 are equidistantly provided in the middle of the shredding box 3.

[0029] When the plastic is being crushed, the waste plastic can be introduced through the feed box 1. At this time, after being guided by the guide seat 2, it can enter the shredder box 3 from the left and right sides of the feed box 1 and wait for crushing. At the same time, the collection box can be placed directly below the discharge port 14 before crushing to complete the preparation work before plastic crushing.

[0030] like Figure 2 and Figure 5 as well as Figure 8 and Fig. 9 As shown, the auxiliary discharging assembly 13 includes two symmetrically arranged front and rear transmission shafts 131, two installation shafts 134 respectively penetrate the front and rear sides of the crushing box 4 and are connected to the middle part of the crushing roller 9, and are fixedly sleeved between the outer side surface of the rear transmission shaft 131 and the driven gear 11, and a first connecting rod 132 is fixedly sleeved on the outer side surface of the transmission shaft 131, and the end of the first connecting rod 132 away from the transmission shaft 131 is movably connected to the second connecting rod 133 through a rotating shaft, and the side of the second connecting rod 133 away from the first connecting rod 132 is movably sleeved with the installation shaft 134, and the installation shaft 134 is fixedly connected to the auxiliary crushing assembly 8.

[0031] When the waste plastic is being crushed, the motor 12 can be turned on to drive the driving gear 10 to rotate, and the upper driven gear 11 rotates accordingly, and drives the transmission shaft 131 to rotate. At this time, the crushing roller 9 located in the middle of the crushing box 4 rotates accordingly. At the same time, when the transmission shaft 131 rotates, the first connecting rod 132 rotates accordingly, and at the same time drives the second connecting rod 133 to swing, and applies a force to the auxiliary crushing assembly 8 through the mounting shaft 134.

[0032] like Figure 2 and Figure 5 as well as Figure 6 and Figure 7 As shown, the auxiliary shredding assembly 8 includes a movable plate 801, and first fixed seats 804 are fixedly installed at the positions near the four corners of the bottom end of the movable plate 801, and an extension rod 802 is fixedly installed at an equal distance in the middle of the bottom end of the movable plate 801. The bottom end of the extension rod 802 passes through the top of the shredding box 3 and is fixedly connected to a hammer plate 803 located inside the shredding box 3. The front and rear ends of the movable plate 801 are fixedly connected to the installation shaft 134, and the end of the first fixed seat 804 away from the movable plate 801 is movably connected to the connecting shaft through a rotating shaft. The rod 806 and the connecting rod 806 are both movably connected to the second fixed seat 805 at one end away from the first fixed seat 804 through a rotating shaft, and the bottom end of the second fixed seat 805 is fixedly installed with an extension seat 807. The auxiliary crushing assembly 8 also includes a cutting knife 808, which is movably connected to the slot 6. The cutting knife 808 is displaced left and right relative to the slot 6. The relatively distant ends of the two cutting knives 808 are connected to the extension seat 807, and the relatively close ends of the two cutting knives 808 are provided with matching serrated grooves.

[0033] Embodiment: Under the continuous swing of the second connecting rod 133, an upward pulling force and a downward pushing force can be applied to the movable plate 801. At this time, the extension rod 802 moves up and down accordingly, and at the same time drives the hammer plate 803 at the bottom to move back and forth up and down. When the hammer plate 803 moves back and forth up and down, the waste plastic located inside the shredder box 3 can be initially hammered to complete the initial fragmentation process, so that the plastic particles are broken into smaller blocks, waiting for the subsequent crushing process.

[0034] By utilizing the rotating process of the device to crush the plastic, and utilizing the cooperation between the auxiliary discharging component 13 and the auxiliary crushing component 8, the waste plastic can be automatically hammered and crushed after entering. The entire crushing process can be automatically completed before the plastic is crushed, which can effectively reduce the pressure during plastic crushing, making the waste plastic easy to crush and significantly improving the crushing efficiency.

[0035] After the initial hammering and crushing of the waste plastic is completed, the waste plastic then enters between the two cutting knives 808. At the same time, the up and down reciprocating displacement of the movable plate 801 can drive the connecting rod 806 to deflect. When the movable plate 801 moves up, the two connecting rods 806 deflect toward the middle and apply a thrust to the cutting knife 808. At this time, the two cutting knives 808 are relatively close to each other, and the plastic particles in the middle can be further sheared and shredded. When the movable plate 801 moves down, the two connecting rods 806 deflect away from the middle and apply a pulling force to the cutting knife 808. At this time, the two cutting knives 808 are relatively far away, so that the waste plastic enters the interior of the two cutting knives 808, and the reciprocating left and right displacement of the two cutting knives 808 can periodically shear and shred the plastic to complete the crushing process again.

[0036] By utilizing the power used by the device during crushing, it can not only hammer and crush the waste plastics, but also shear and shred the plastics. The entire process is completed before crushing and is completed automatically. It can significantly reduce the size of the plastic during crushing, and transform the waste plastics into regular and smaller plastic plates, reducing the subsequent crushing pressure, thereby improving the overall crushing efficiency.

[0037] like Figure 5 and Fig. 9 As shown, the outer side surfaces of the installation shafts 134 are fixedly sleeved with linkage frames 135 , and a dredging tooth 136 located just below the discharge port 14 is fixedly installed between the bottom ends of the two linkage frames 135 .

[0038] Embodiment: The plastic after shearing and shredding can enter the interior of the crushing box 4. At this time, due to the high-speed rotation of the crushing roller 9, the plastic inside the crushing box 4 can be further crushed to complete the final crushing process. The crushed plastic can be discharged through the discharge port 14 at the bottom. At the same time, when the movable plate 801 moves back and forth up and down, it can synchronously drive the mounting shaft 134 and the linkage frame 135 to move back and forth up and down, and finally drive the dredging teeth 136 to move back and forth up and down, and apply a force to the inside of the discharge port 14, automatically dredge the inside of the discharge port 14, and reduce blockage.

[0039] By further utilizing the rotational power during plastic crushing, the discharge port 14 can be automatically unblocked while achieving preliminary hammering and shearing crushing of the plastic. The entire unblocking process can be completed automatically without stopping the machine for operation. It can be completed automatically during plastic crushing, thereby reducing discharge blockage, improving discharge efficiency, and improving overall crushing efficiency.

[0040] Working principle and usage process: When the plastic is crushed, the waste plastic can be introduced through the feed box 1. At this time, after being guided by the guide seat 2, the waste plastic can enter the shredding box 3 from the left and right sides of the feed box 1 to wait for crushing. At the same time, the collection box can be placed directly below the discharge port 14 before crushing to complete the preparation work before crushing the plastic. When the waste plastic is being crushed, the motor 12 can be turned on to drive the driving gear 10 to rotate, and the upper driven gear 11 rotates accordingly, and drives the transmission shaft 131 to rotate, and the crushing roller 9 located in the middle of the crushing box 4 rotates accordingly. At the same time, when the transmission shaft 131 rotates, the first connecting rod 132 rotates accordingly, and drives the second connecting rod 133 to swing, and applies a force to the auxiliary crushing assembly 8 through the mounting shaft 134; Under the continuous swing of the second connecting rod 133, an upward pulling force and a downward pushing force can be applied to the movable plate 801, and the extension rod 802 moves up and down accordingly, and at the same time drives the hammer plate 803 at the bottom to move back and forth up and down. When the hammer plate 803 moves back and forth up and down, the waste plastic inside the shredder box 3 can be initially hammered to complete the initial crushing process, so that the plastic particles are broken into smaller blocks, waiting for the subsequent crushing process; After the initial hammering and crushing of the waste plastic is completed, the waste plastic then enters between the two cutting knives 808, and the up and down reciprocating displacement of the movable plate 801 can drive the connecting rod 806 to deflect. When the movable plate 801 moves up, the two connecting rods 806 deflect toward the middle and apply a thrust to the cutting knives 808. At this time, the two cutting knives 808 are relatively close to each other, and the plastic particles in the middle can be further sheared and shredded. When the movable plate 801 moves down, the two connecting rods 806 deflect away from the middle and apply a pulling force to the cutting knives 808. At this time, the two cutting knives 808 are relatively far away from each other, so that the waste plastic enters the inside of the two cutting knives 808, and the reciprocating left and right displacement of the two cutting knives 808 can periodically shear and shred the plastic, completing the crushing process again. The plastic after shearing and shredding can enter the interior of the crushing box 4. At this time, due to the high-speed rotation of the crushing roller 9, the plastic inside the crushing box 4 can be further crushed to complete the final crushing process. The crushed plastic can be discharged through the discharge port 14 at the bottom. At the same time, when the movable plate 801 moves back and forth up and down, it can synchronously drive the mounting shaft 134 and the linkage frame 135 to move back and forth up and down, and finally drive the dredging teeth 136 to move back and forth up and down, and apply a force to the inside of the discharge port 14, automatically dredge the inside of the discharge port 14, and reduce blockage.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plastic pulverizer, comprising a feed box (1), characterized in that: The bottom end of the feed box (1) is fixedly connected to a shredding box (3), and the bottom end of the shredding box (3) is fixedly connected to a crushing box (4). A guide seat (2) is fixedly installed in the middle of the inner cavity of the feed box (1). A discharge port (14) is provided at the bottom end of the crushing box (4). Both ends of the outer side of the crushing box (4) are fixedly installed with a base (7). An auxiliary crushing component (8) is movably installed inside the shredding box (3). An auxiliary discharge component (13) is provided at the bottom end of the discharge port (14). The top end of the auxiliary discharge component (13) is connected to the auxiliary crushing component (8). The shredding box (4) and the auxiliary discharging assembly (8) are connected to each other, a shredding roller (9) is movably mounted in the middle of the shredding box (4), a motor (12) is fixedly mounted on the rear side of the shredding box (4), a driving gear (10) is fixedly mounted on the output end of the motor (12), a driven gear (11) is meshingly connected above the driving gear (10), and the driven gear (11) is fixedly sleeved with the rear end of the auxiliary discharging assembly (13), the shredding box (3) is provided with card slots (6) on both sides near the bottom, and through holes (5) are equidistantly mounted in the middle of the shredding box (3).

2. A plastic crusher according to claim 1, characterized in that: The auxiliary discharging assembly (13) comprises two symmetrically arranged transmission shafts (131) at the front and rear, and the two mounting shafts (134) respectively penetrate the front and rear sides of the crushing box (4) and are connected to the middle of the crushing roller (9), and are fixedly sleeved between the outer side surface of the transmission shaft (131) at the rear and the driven gear (11).

3. A plastic crusher according to claim 2, characterized in that: A first connecting rod (132) is fixedly sleeved on the outer side surface of the transmission shaft (131), and one end of the first connecting rod (132) away from the transmission shaft (131) is movably connected to a second connecting rod (133) via a rotating shaft.

4. A plastic crusher according to claim 3, characterized in that: A mounting shaft (134) is movably sleeved on a side of the second connecting rod (133) away from the first connecting rod (132), and the mounting shaft (134) is fixedly connected to the auxiliary crushing assembly (8).

5. A plastic crusher according to claim 4, characterized in that: The auxiliary shredding assembly (8) comprises a movable plate (801), wherein first fixing seats (804) are fixedly mounted at positions near the four corners of the bottom end of the movable plate (801), and extension rods (802) are fixedly mounted at equal distances in the middle of the bottom end of the movable plate (801), wherein the bottom end of the extension rod (802) passes through the top end of the shredding box (3) and is fixedly connected to a hammer plate (803) located inside the shredding box (3), and the front and rear ends of the movable plate (801) are fixedly connected to the mounting shaft (134).

6. A plastic crusher according to claim 5, characterized in that: One end of the first fixed seat (804) away from the movable plate (801) is movably connected to a connecting rod (806) via a rotating shaft, and one end of the connecting rod (806) away from the first fixed seat (804) is movably connected to a second fixed seat (805) via a rotating shaft, and an extension seat (807) is fixedly installed at the bottom end of the second fixed seat (805).

7. A plastic crusher according to claim 6, characterized in that: The auxiliary crushing assembly (8) further comprises a cutting knife (808), wherein the cutting knife (808) is movably engaged with the slot (6), and the cutting knife (808) is displaced left and right relative to the slot (6), and the ends of the two cutting knives (808) that are relatively far away from each other are connected to the extension seat (807), and the ends of the two cutting knives (808) that are relatively close to each other are both provided with matching sawtooth grooves.

8. A plastic crusher according to claim 4, characterized in that: The outer side surfaces of the installation shafts (134) are fixedly sleeved with linkage frames (135), and a dredging tooth (136) located directly below the discharge port (14) is fixedly installed at a position between the bottom ends of the two linkage frames (135).

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