Crushing and separating production line for aluminum-containing PVC plastic package

Abstract

The invention discloses a crushing and separating production line for aluminum-containing PVC (polyvinyl chloride) plastic packages, which comprises a shredder, a buffer bin, a crushing host and a cyclone separator which are sequentially arranged, the cyclone separator is connected with a dust remover, an air outlet of the dust remover is connected with an induced draft fan, and an ash discharge port of the cyclone separator and a discharge port of the dust remover are both connected to a screening machine. A discharging port of the screening machine is connected with an electrostatic separator, a first conveying mechanism is arranged between the shredding machine and the buffering stock bin, a second conveying mechanism is arranged between the buffering stock bin and the smashing main machine, and a third conveying mechanism is arranged between the smashing main machine and the cyclone separator. The smashing main machine comprises a smashing cylinder, a smashing cavity is formed in the upper portion of an inner cavity of the smashing cylinder, and a feeding cavity is formed in the lower portion of the smashing cylinder, so that materials are fully smashed and rapidly enter a stock bin cyclone collector through a smashing area under the negative pressure effect of an induced draft fan, and the situation that the concentration of particles in the smashing cavity is too high is avoided.

Description

Technical Field

[0001] The invention relates to a pulverizing production line, in particular to a pulverizing and separating production equipment for aluminum-containing PVC plastic packaging. Background Art

[0002] In the plastic recycling industry, the crushing of aluminum-containing PVC (polyvinyl chloride) plastic packaging materials is a challenging task. This type of material is usually composed of a PVC matrix and an aluminum foil layer. It is widely used in food packaging, pharmaceutical packaging and other fields, and has excellent barrier properties and mechanical strength. However, due to its composite material characteristics, aluminum powder has a high production safety risk during the crushing process due to its flammable and explosive properties. The three elements of aluminum powder combustion and explosion include: material concentration, particle fineness and sparks. When the concentration of aluminum powder in the crushing chamber reaches a certain range and the particle fineness is small, it encounters ignition sources such as sparks or electrostatic discharge, which can easily cause combustion and explosion accidents, posing a serious threat to production equipment and personnel safety.

[0003] In the prior art, aluminum powder crushing equipment usually uses simple ventilation or negative pressure devices to control the material concentration. However, this method is difficult to accurately control the aluminum powder concentration in the crushing chamber, and there is a problem of large fluctuations in material concentration. In addition, the material passing efficiency of traditional crushing equipment is low, resulting in aluminum powder staying in the crushing chamber for too long, increasing the risk of explosion. At the same time, aluminum powder is prone to generate static electricity due to friction during the crushing process, and the lack of effective anti-static measures further exacerbates safety hazards. Summary of the invention

[0004] In order to make up for the above shortcomings, the present invention provides a crushing and separation production line for aluminum-containing PVC plastic packaging, which can effectively control the material concentration in the crushing chamber and take effective anti-static measures.

[0005] The technical solution of the present invention is: a crushing and separation production line for aluminum-containing PVC plastic packaging, comprising a shredder, a buffer silo, a crushing main unit, and a cyclone separator which are arranged in sequence, the exhaust pipe of the cyclone separator is connected to a dust collector, the air outlet of the dust collector is connected to an induced draft fan, the ash discharge port of the cyclone separator and the material discharge port of the dust collector are both connected to a screening machine, the material discharge port of the screening machine is connected to an electrostatic separator, a first conveying mechanism is provided between the shredder and the buffer silo, a second conveying mechanism is provided between the buffer silo and the crushing main unit, and a third conveying mechanism is provided between the crushing main unit and the cyclone separator.

[0006] As a preferred technical solution, a silo cyclone separator is provided on the upper portion of the buffer silo, the feed port of the silo cyclone separator is connected to the discharge end of the first conveying mechanism, and the discharge port of the silo cyclone separator is connected to the buffer silo.

[0007] As a preferred technical solution, the first conveying mechanism includes a screw conveyor arranged at the discharge port of the shredder, the discharge end of the screw conveyor is connected to a feed fan, and a discharge pipe is provided between the discharge end of the feed fan and the feed port of the silo cyclone separator.

[0008] As a preferred technical solution, the second conveying mechanism includes a vibrating discharger installed at the discharge port of the buffer silo and a feeding belt conveyor arranged between the vibrating discharger and the crushing main machine.

[0009] As a preferred technical solution, the crushing main unit includes a crushing cylinder, a crushing chamber is provided at the upper part of the inner cavity of the crushing cylinder, a feeding chamber is provided at the lower part of the crushing cylinder, a feeding port is provided between the feeding chamber and the crushing chamber, the feeding chamber is an annular chamber, the feeding chamber is connected with a feeding port, the crushing chamber is connected with a discharging port, a crushing mechanism is rotatably installed in the crushing chamber, the crushing mechanism includes a crushing roller, a dynamic crushing knife is fixedly installed on the outer peripheral surface of the crushing roller, a static crushing knife cooperating with the dynamic crushing knife is provided on the inner wall of the crushing chamber, the crushing roller is connected with a rotating drive motor, and the feeding port is annular and located on the inner side of the dynamic crushing knife.

[0010] As a preferred technical solution, the crushing roller includes a cylinder body, which includes an inner cylinder and an outer cylinder fixedly installed together, the outer cylinder is sleeved on the outside of the inner cylinder, and the outer cylinder is provided with a plurality of vertically extending slots, the slots pass through the upper end surface and the lower end surface of the outer cylinder from top to bottom, the upper end of the cylinder body is detachably mounted with an upper end cover, and the lower end of the cylinder body is detachably mounted with a lower end cover, a plurality of threaded through holes are opened on the cylinder wall of the inner cylinder, tightening bolts are screwed into the threaded through holes, a strip knife seat is clamped in the slot, a bottom plate located between the outer cylinder and the inner cylinder is fixedly mounted on the strip knife seat, the bottom plate is perpendicular to the strip knife seat, mounting screw holes matching the tightening bolts are provided on the bottom plate, and a dynamic crushing knife is mounted on the strip knife seat.

[0011] As a preferred technical solution, a material retaining ring is fixedly mounted on the lower surface of the lower end cover.

[0012] As a preferred technical solution, a static knife seat is fixedly installed on the inner wall of the crushing chamber, and the static crushing knife is detachably fixed on the static knife seat; a crushing groove is provided on the outer surface of the static crushing knife, and the crushing groove extends up and down, and the groove wall of the crushing groove includes a first groove wall extending toward the interior of the crushing chamber along the rotation direction of the crushing roller and a second groove wall extending toward the interior of the crushing chamber against the rotation direction of the crushing roller, a first angle between the second groove wall and the inner wall of the crushing chamber is smaller than a second angle between the first groove wall and the inner wall of the crushing chamber, and the rotation direction of the crushing roller is from the second groove wall to the first groove wall.

[0013] As a preferred technical solution, the inner wall of the crushing cylinder is provided with a vertical groove, the upper end of the vertical groove extends to the upper end surface of the crushing cylinder, the cross-section of the static knife seat is trapezoidal, the upper base of the trapezoid is attached to the inner wall of the crushing cylinder, the static crushing knife is provided with a slot cooperating with the static knife seat, and the upper end of the crushing cylinder is fixedly installed with a pressing block pressing down on the upper end of the static knife.

[0014] As a preferred technical solution, the motor of the feed belt conveyor is connected to a controller, and the controller is also electrically connected to the rotating drive motor of the crushing host; the controller reduces the speed of the motor of the feed belt conveyor after the current of the rotating drive motor is greater than a certain value.

[0015] Due to the adoption of the above technical solution, the shredder tears the raw materials into small pieces, which fall through the shredder mesh holes to the screw conveyor, and the screw conveyor pushes the materials to the suction port of the feeding fan. The feeding fan generates negative pressure to send the materials into the entrance of the cyclone separator at the top of the buffer silo. The cyclone separator in the silo separates the gas and solid, and the gas is discharged from the top of the cyclone separator in the silo and the solid particles fall into the buffer silo. A vibrating discharger is installed at the bottom of the buffer silo. The discharge port of the vibrating discharger is designed with a gate to adjust the opening to control the size of the discharge amount. The feeding belt conveyor sends the materials into The material entering the feed port of the crushing main machine and the negative pressure generated by the induced draft fan form a gas-solid flow that enters the crushing chamber and is crushed. The crushed material enters the cyclone separator under the action of the system negative pressure. The gas-solid flow of the material entering the cyclone separator is separated, and the separated solid particles of the material fall into the discharge screw conveyor along the cyclone wall. The gas entrained fine particles enter the dust collector under the action of negative pressure. The discharge screw conveyor sends the solid particles of the material to the entrance of the elevator. The elevator lifts the material particles to the screening machine, and the screened material is separated by the electrostatic separator. The dynamic crushing knife and the static crushing knife of the crushing main machine generate extremely high impact and shear force on the material through the high-speed rotation of the rotor to crush the material. The method of feeding from the bottom and discharging from the top is adopted to make the material fully crushed and quickly pass through the crushing area under the negative pressure of the induced draft fan to enter the cyclone collector of the silo, avoiding excessive particle concentration in the crushing chamber. In order to further control the particle concentration in the crushing chamber, a method of controlling the feed amount of the main machine by current is designed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 is a process route diagram of an embodiment of the present invention;

[0018] Figure 2 is a top view of an embodiment of the present invention;

[0019] Figure 3 2 is a schematic diagram of the structure of a crushing host in an embodiment of the present invention;

[0020] Figure 4 yes Figure 3 A partial enlarged view of point I in the middle;

[0021] Figure 5 is a top view of a crushing roller in an embodiment of the present invention;

[0022] Figure 6 yes Figure 5A partial enlarged view of position II in the middle;

[0023] Figure 7 Schematic diagram of the structure of the inner cylinder and the outer cylinder in an embodiment of the present invention;

[0024] Figure 8 yes Figure 7 A partial enlarged view of the part III in the middle;

[0025] Fig. 9 2 is a schematic diagram of the structure of a crushing cylinder in an embodiment of the present invention;

[0026] Fig.10 yes Fig. 9 A partial enlarged view of the IV in the middle;

[0027] Fig.11 yes Fig. 9 A top view of

[0028] Fig.12 yes Fig.11 A partial enlarged view of the V in the middle. DETAILED DESCRIPTION

[0029] like Figure 1 and Figure 2 As shown, a pulverizing and separating production line for aluminum-containing PVC plastic packaging comprises a shredder 1, a buffer silo 2, a pulverizing main unit 3, and a cyclone separator 4 which are arranged in sequence. The exhaust pipe of the cyclone separator 4 is connected to a dust collector 5, and the air outlet of the dust collector 5 is connected to an induced draft fan 6. The ash discharge port of the cyclone separator 4 and the discharge port of the dust collector 5 are both connected to a screening machine 7, and the discharge port of the screening machine 7 is connected to an electrostatic separator 8. A first conveying mechanism is provided between the shredder 1 and the buffer silo 2, a second conveying mechanism is provided between the buffer silo 2 and the pulverizing main unit 3, and a third conveying mechanism is provided between the pulverizing main unit 3 and the cyclone separator 4. An explosion-proof fire extinguishing hood 34 is installed on the pipeline between the cyclone separator 4 and the dust collector 5, and the explosion-proof fire extinguishing hood 34 is also installed on the dust collector. As shown Figure 1 and Figure 2 As shown, a silo cyclone separator 9 is provided on the upper part of the buffer silo 2, the feed port of the silo cyclone separator 9 is connected to the discharge end of the first conveying mechanism, and the discharge port of the silo cyclone separator 9 is connected to the buffer silo 2. The shredder 1 is for coarse crushing without dust, so the silo cyclone separator 9 is provided to separate gas and solid, exhaust gas, and collect solid particles by the silo cyclone separator 9 and fall into the buffer silo 2. The third conveying mechanism includes a conveying pipeline provided between the pulverizing main machine and the cyclone separator.

[0030] like Figure 1 and Figure 2As shown, the first conveying mechanism includes a screw conveyor 10 provided at the discharge port of the shredder 1, the discharge end of the screw conveyor 10 is connected to a feeding fan 11, and a discharge pipe 12 is provided between the discharge end of the feeding fan 11 and the feed port of the silo cyclone separator 9. The feeding fan 11 sucks the materials concentrated at the discharge port of the screw conveyor 10 to the buffer silo 2.

[0031] like Figure 1 and Figure 2 As shown, the second conveying mechanism includes a vibrating discharger 13 installed at the discharge port of the buffer silo 2 and a feeding belt conveyor 14 provided between the vibrating discharger 13 and the crushing main machine 3. The discharge port of the vibrating discharger 13 is provided with a gate, and the feeding amount of the crushing main machine is controlled by adjusting the opening size. The ash discharge port of the cyclone separator and the discharge port of the dust collector are connected to the screening machine via a discharge screw conveyor 15.

[0032] like Figure 1 and Figure 2 As shown, the raw material is added to the feed port of the shredder 1, and the shredder 1 shreds the raw material into 5 mm blocks, which fall through the shredder mesh holes to the screw conveyor 10, and the screw conveyor 10 pushes the material to the suction port of the feeding fan 11. The feeding fan 11 generates negative pressure when it runs to feed the material into the entrance of the cyclone separator 9 at the top of the buffer silo 2. The cyclone separator 9 separates the gas and solid, and the gas is discharged from the top of the cyclone separator and the solid particles fall into the buffer silo 2. The lower part of the buffer silo is equipped with a vibrating discharger 13, and the discharge port of the vibrating discharger 13 is designed with a gate to adjust the opening to control the size of the discharge amount. The feeding belt conveyor 14 feeds the material into the feed port of the crushing main machine 3. The material entering the feed port of the crushing main machine 3 and the negative pressure generated by the induced draft fan form a gas-solid flow that enters the crushing chamber to be crushed. The crushed material enters the cyclone separator 4 under the action of the system negative pressure. The gas-solid flow of the material entering the cyclone separator is separated, and the separated solid particles of the material fall into the discharge screw conveyor 15 along the cyclone wall. The fine particles entrained by the gas enter the dust collector 5 under the action of negative pressure. The discharge screw conveyor 15 feeds the solid particles of the material into the entrance of the elevator 16. The elevator 16 lifts the material particles to the screening machine 7, and the screened material is separated by the electrostatic separator 8.

[0033] The shredder consists of a moving blade, a stationary blade, a hydraulic pusher and a casing safety protection device. Its function is to coarsely crush large pieces of material into small pieces of less than 5 cm. Materials that can be shredded: tablet boxes, aluminum and PE plastics, circuit boards, PCB boards, aluminum bases, copper bases, packaging paper, aluminum-paper composites and other soft metal and non-metal composites can all be shredded. The shredder in this embodiment adopts existing technology.

[0034] like Figures 3 to 12As shown, the crushing main machine includes a crushing cylinder 17, a crushing chamber 18 is provided at the upper part of the inner cavity of the crushing cylinder 17, a feeding chamber 19 is provided at the lower part of the crushing cylinder 17, a feeding port 20 is provided between the feeding chamber 19 and the crushing chamber 18, the feeding chamber 19 is an annular chamber, the feeding chamber 19 is connected to a feeding port 21, the crushing chamber 18 is connected to a discharge port 22, a crushing mechanism is rotatably installed in the crushing chamber 18, the crushing mechanism includes a crushing roller 23, a dynamic crushing knife 24 is fixedly installed on the outer peripheral surface of the crushing roller 23, a static crushing knife 25 matched with the dynamic crushing knife 24 is provided on the inner wall of the crushing chamber 18, the crushing roller 23 is connected to a rotating drive motor, and the feeding port 20 is annular and located on the inner side of the dynamic crushing knife 24. The dynamic crushing knife 24 and the static crushing knife 25 produce extremely high impact force and shear force on the material through high-speed rotation to crush the material. Aluminum powder is flammable and explosive, and its particle size, particle concentration, and open sparks have a significant impact on production safety. When designing the equipment based on the material characteristics, in order to control the crushing particle size, the crusher is not designed with a built-in classifier, so that the crushed material no longer enters the crushing area but quickly flows away from the crushing area. This design adopts the method of feeding from the bottom and discharging from the top, so that the material is fully crushed and quickly passes through the crushing area under the negative pressure of the induced draft fan and enters the cyclone collector in the silo.

[0035] like Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the pulverizing roller includes a cylinder body, which includes an inner cylinder 26 and an outer cylinder 27 fixedly mounted together, the outer cylinder 27 is sleeved on the outside of the inner cylinder 26, and the outer cylinder 27 is provided with a plurality of vertically extending slots 33, which pass through the upper end surface and the lower end surface of the outer cylinder from top to bottom. An upper end cover 28 is detachably mounted on the upper end of the cylinder body, and a lower end cover 29 is detachably mounted on the lower end of the cylinder body. A plurality of threaded through holes are provided on the cylinder wall of the inner cylinder 26, and tightening bolts 30 are screwed into the threaded through holes. A strip knife seat 31 is clamped in the slots, and a bottom plate 32 located between the outer cylinder 27 and the inner cylinder 26 is fixedly mounted on the strip knife seat 31, the bottom plate 32 is perpendicular to the strip knife seat 31, and mounting screw holes cooperating with the tightening bolts 30 are provided on the bottom plate 32, and a dynamic pulverizing knife is mounted on the strip knife seat. The strip-type knife holder 31 is fixed by the slot and the tightening bolt 30, and can be disassembled and replaced independently without disassembling the entire crushing roller, which greatly simplifies the maintenance process and improves the equipment utilization rate. The fixing method of the tightening bolt 30 is easy to operate, and the blade can be replaced and adjusted without complicated tools. The strip-type knife holder is doubly fixed by the slot and the tightening bolt, which effectively prevents the blade from loosening or falling off during use, and improves the operation stability of the equipment. The tightening bolt 30 firmly presses the bottom plate on the inner cylinder through the threaded through hole to ensure that the dynamic crushing knife is evenly stressed and avoids damage to the dynamic crushing knife caused by stress concentration. Modular design and convenient maintenance methods can detect and handle equipment failures in a timely manner, avoid the expansion of failures, and extend the service life of the equipment. Convenient maintenance methods can reduce equipment downtime, improve production efficiency, and reduce production costs.

[0036] like Figure 3 and Figure 4 As shown, a blocking ring 35 is fixedly mounted on the lower surface of the lower end cover 29. The blocking ring 35 can prevent the fine materials generated during the crushing process from escaping from the lower end of the crushing roller. The blocking ring 35 blocks the materials in the crushing chamber 18, so that the materials can be fully crushed, thereby improving the material utilization rate and crushing efficiency. By adjusting the position and shape of the blocking ring 35, the residence time of the material can be controlled, thereby optimizing the control of the material particle size. For example, the blocking ring is a square ring or a hexagonal ring.

[0037] like Figures 8 to 12As shown, a static knife seat 36 is fixedly mounted on the inner wall of the pulverizing chamber 18, and the static pulverizing knife is detachably fixedly mounted on the static knife seat 36; a pulverizing groove 37 is provided on the outer surface of the static pulverizing knife 25, and the pulverizing groove 37 extends up and down, and the groove wall of the pulverizing groove 37 includes a first groove wall 38 extending toward the inside of the pulverizing chamber along the rotation direction of the pulverizing roller and a second groove wall 39 extending toward the inside of the pulverizing chamber against the rotation direction of the pulverizing roller, and a first angle 45 between the second groove wall 39 and the inner wall of the pulverizing chamber 18 is smaller than a second angle 46 between the first groove wall 38 and the inner wall of the pulverizing chamber 18, and the rotation direction of the pulverizing roller is from the second groove wall 39 to the first groove wall 38. In this way, under the action of the pulverizing roller, the material can enter the pulverizing groove 21 more easily, and the pulverizing efficiency is effectively improved. The same static crushing knife is provided with three crushing grooves, which are the first crushing groove, the second crushing groove and the third crushing groove along the rotation direction of the crushing roller. The depth of the first crushing groove is greater than the depth of the second crushing groove, and the depth of the second crushing groove is greater than the depth of the third crushing groove. The retention time of the material in the first crushing groove is relatively long, and the material is fully crushed. At the same time, the larger depth of the first crushing groove is used to effectively buffer the material, avoiding excessive material from directly entering the second crushing groove and the third crushing groove. Similarly, the second crushing groove can also buffer the amount of material entering the third crushing groove. Due to the buffering of the first and second crushing grooves and the shallow depth of the third crushing groove, the material can be fully crushed through the third crushing groove. When the material passes through the adjacent static crushing knife, it will continuously pass through the first crushing groove, the second crushing groove and the third crushing groove of the adjacent static crushing knife, which effectively improves the efficiency of crushing.

[0038] like Fig. 9 and Fig.10 As shown, the inner wall of the pulverizing cylinder 17 is provided with a vertical groove 40, the upper end of the vertical groove 40 extends to the upper end surface of the pulverizing cylinder 17, the cross-section of the static knife seat 36 is trapezoidal, the upper base 41 of the trapezoid fits against the inner wall of the pulverizing cylinder 17, the static pulverizing knife is provided with a slot cooperating with the static knife seat 36, and the upper end of the pulverizing cylinder 17 is fixedly mounted with a pressing block 43 pressing down on the upper end of the static knife.

[0039] The motor of the feed belt conveyor is connected to a controller, and the controller is also electrically connected to the rotation drive motor 44 of the crushing main machine; the controller reduces the speed of the motor of the feed belt conveyor after the current of the rotation drive motor is greater than a certain value. In order to control the particle concentration in the crushing chamber, a method of controlling the feed amount of the main machine by current is designed. When the particle concentration in the crushing area of ​​the crushing main machine increases during the crushing process, the current of the rotation drive motor 44 of the crushing main machine increases, and the controller controls the feed amount of the feed belt conveyor to decrease.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A crushing and separation production line for aluminum-containing PVC plastic packaging, characterized in that: The invention comprises a shredder, a buffer silo, a pulverizing main machine and a cyclone separator which are arranged in sequence, wherein the exhaust pipe of the cyclone separator is connected to a dust collector, the air outlet of the dust collector is connected to an induced draft fan, the ash discharge port of the cyclone separator and the material discharge port of the dust collector are both connected to a screening machine, the material discharge port of the screening machine is connected to an electrostatic separator, a first conveying mechanism is arranged between the shredder and the buffer silo, a second conveying mechanism is arranged between the buffer silo and the pulverizing main machine, and a third conveying mechanism is arranged between the pulverizing main machine and the cyclone separator.

2. The crushing and separation production line for aluminum-containing PVC plastic packaging according to claim 1, characterized in that: A silo cyclone separator is provided on the upper portion of the buffer silo, a feed port of the silo cyclone separator is communicated with a discharge end of the first conveying mechanism, and a discharge port of the silo cyclone separator is communicated with the buffer silo.

3. The crushing and separation production line for aluminum-containing PVC plastic packaging according to claim 2, characterized in that: The first conveying mechanism comprises a screw conveyor arranged at the discharge port of the shredder, the discharge end of the screw conveyor is connected to a feeding fan, and a discharge pipe is arranged between the discharge end of the feeding fan and the feed port of the silo cyclone separator.

4. The crushing and separation production line for aluminum-containing PVC plastic packaging according to claim 1, characterized in that: The second conveying mechanism includes a vibrating discharger installed at the discharge port of the buffer silo and a feeding belt conveyor arranged between the vibrating discharger and the crushing main machine.

5. The crushing and separation production line for aluminum-containing PVC plastic packaging according to claim 1, characterized in that: The main crushing machine includes a crushing cylinder, a crushing chamber is provided at the upper part of the inner cavity of the crushing cylinder, a feeding chamber is provided at the lower part of the crushing cylinder, a feeding port is provided between the feeding chamber and the crushing chamber, the feeding chamber is an annular chamber, the feeding chamber is connected with a feeding port, the crushing chamber is connected with a discharging port, a crushing mechanism is rotatably installed in the crushing chamber, the crushing mechanism includes a crushing roller, a dynamic crushing knife is fixedly installed on the outer peripheral surface of the crushing roller, a static crushing knife matched with the dynamic crushing knife is provided on the inner wall of the crushing chamber, the crushing roller is connected with a rotating drive motor, and the feeding port is annular and located on the inner side of the dynamic crushing knife.

6. The crushing and separation production line for aluminum-containing PVC plastic packaging according to claim 5, characterized in that: The crushing roller comprises a cylinder body, which comprises an inner cylinder and an outer cylinder fixedly mounted together, the outer cylinder is sleeved on the outside of the inner cylinder, a plurality of vertically extending slots are provided on the outer cylinder, the slots pass through the upper end surface and the lower end surface of the outer cylinder up and down, an upper end cover is detachably mounted on the upper end of the cylinder body, and a lower end cover is detachably mounted on the lower end of the cylinder body, a plurality of threaded through holes are opened on the cylinder wall of the inner cylinder, tightening bolts are screwed into the threaded through holes, a strip knife seat is clamped in the slot, a bottom plate located between the outer cylinder and the inner cylinder is fixedly mounted on the strip knife seat, the bottom plate is perpendicular to the strip knife seat, mounting screw holes matching the tightening bolts are provided on the bottom plate, and a dynamic crushing knife is mounted on the strip knife seat.

7. The crushing and separation production line for aluminum-containing PVC plastic packaging according to claim 6, characterized in that: A material blocking ring is fixedly mounted on the lower surface of the lower end cover.

8. The crushing and separation production line for aluminum-containing PVC plastic packaging according to claim 5, characterized in that: A stationary knife seat is fixedly mounted on the inner wall of the crushing chamber, and the stationary crushing knife is detachably fixedly mounted on the stationary knife seat; a crushing groove is provided on the outer surface of the stationary crushing knife, and the crushing groove extends up and down, and the groove wall of the crushing groove includes a first groove wall extending toward the inside of the crushing chamber along the rotation direction of the crushing roller and a second groove wall extending toward the inside of the crushing chamber against the rotation direction of the crushing roller, a first angle between the second groove wall and the inner wall of the crushing chamber is smaller than a second angle between the first groove wall and the inner wall of the crushing chamber, and the rotation direction of the crushing roller is from the second groove wall to the first groove wall.

9. The crushing and separation production line for aluminum-containing PVC plastic packaging according to claim 8, characterized in that: The inner wall of the crushing cylinder is provided with a vertical groove, the upper end of the vertical groove extends to the upper end surface of the crushing cylinder, the cross-section of the stationary knife seat is trapezoidal, the upper base of the trapezoid is attached to the inner wall of the crushing cylinder, the stationary crushing knife is provided with a slot cooperating with the stationary knife seat, and the upper end of the crushing cylinder is fixedly installed with a pressing block pressing down on the upper end of the stationary knife.

10. The crushing and separation production line for aluminum-containing PVC plastic packaging according to claim 4, characterized in that: The motor of the feed belt conveyor is connected to a controller, and the controller is also electrically connected to the rotation drive motor of the crushing host; the controller reduces the rotation speed of the motor of the feed belt conveyor after the current of the rotation drive motor is greater than a certain value.

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