Crushing equipment for engineering plastics

Abstract

The invention relates to the technical field of plastic smashing, and discloses engineering plastic smashing equipment which comprises a smashing box, a feeding port is formed in the side edge of a top plate of the smashing box, an air exhaust assembly is arranged on the side, away from the feeding port, of the top of the smashing box, and the engineering plastic smashing equipment further comprises a primary smashing mechanism and a secondary smashing mechanism; the secondary crushing mechanism comprises a transverse moving plate and a sieve plate which are arranged in parallel, the sieve plate is arranged on the side, close to the bottom of the crushing box, of the transverse moving plate, the side, away from the feeding opening, of the sieve plate is obliquely arranged towards the bottom of the crushing box, screening holes are formed in the sieve plate, and the transverse moving plate is slidably connected with the side wall of the crushing box; tiling raised lines perpendicular to the moving direction of the transverse moving plate are arranged on the side, close to the feeding port, of the transverse moving plate, and an air hole is formed between every two adjacent tiling raised lines. According to the device, the horizontally-laid protruding strips and the air holes are formed in the transverse moving plate, so that label coverings separated out by the primary smashing mechanism can be separated from plastic blocks along with airflow.

Description

Technical Field

[0001] The invention relates to the technical field of plastic crushing, in particular to crushing equipment for engineering plastics. Background Art

[0002] Engineering plastics refer to industrial plastics used as industrial parts or shell materials. They are high-performance plastics that can be used as structural materials, withstand mechanical stress in a wide temperature range, and be used in harsh chemical and physical environments. Some thermoplastic engineering plastics can be recycled and reused by heating and melting, and waste plastics can be reprocessed into new plastic products to reduce resource waste and environmental pollution.

[0003] Plastics need to be crushed when they are recycled. Plastic products can be poured into a crusher and crushed into particles, which is convenient for subsequent processing. However, some plastic products have coverings such as label paper on the surface. Direct crushing will mix them with the plastic particles, affecting subsequent processing steps. Therefore, it is necessary to add a function to remove coverings such as label paper in the existing crusher to improve the efficiency of crushing. Summary of the invention

[0004] The present invention provides a crushing device for engineering plastics, which solves the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A crushing device for engineering plastics, comprising a crushing box, a feed inlet is arranged on the side of the top plate of the crushing box, an exhaust assembly is arranged on the side of the top of the crushing box away from the feed inlet, and also comprises a primary crushing mechanism and a secondary crushing mechanism; the primary crushing mechanism is arranged on the side of the crushing box close to the feed inlet, and comprises two crushing rollers rotatably connected to the crushing box, and crushing teeth are arranged on the outside of the crushing rollers; the secondary crushing mechanism comprises a transverse plate and a screen plate arranged in parallel with each other, the screen plate is arranged on the side of the transverse plate close to the bottom of the crushing box, and the screen plate is away from the feed inlet One side of the pulverizing box is inclined toward the bottom of the pulverizing box, and screening holes are arranged on the screen plate. The transverse plate is slidably connected to the side wall of the pulverizing box, and a flat convex strip perpendicular to the moving direction of the transverse plate is arranged on the side of the transverse plate close to the feed port, and an air vent is arranged between two adjacent flat convex strips, and a cutting groove matching the screening holes is arranged on the side of the transverse plate away from the feed port. An air inlet is arranged on the side wall of the pulverizing box below the sieve plate, and external air enters into the interior of the pulverizing box through the air inlet, and the airflow passes through the sieve plate and the transverse plate and is discharged through the exhaust assembly.

[0006] As a preferred technical solution of the present invention, a feeding arc plate is arranged on one side of the crushing roller close to the center of the crushing box, one end of the feeding arc plate is connected to the top plate of the crushing box, and a gap is left between the other end of the feeding arc plate and the side wall of the crushing box. The slitting groove is arranged parallel to the flattening convex strip, and a cutter cooperating with the slitting groove is arranged on the screen plate, and the cutter is arranged between two adjacent screening holes.

[0007] As a preferred technical solution of the present invention, a guide ramp is provided at the bottom of the crushing box, and a reciprocating drive assembly for driving the transverse plate to reciprocate is provided between the guide ramp and the bottom of the crushing box. A debris discharge port is provided at the bottom of the side wall of the crushing box, the debris discharge port is located below the air inlet, and the debris discharge port is detachably connected to a debris discharge drawer that cooperates with the guide ramp.

[0008] As a preferred technical solution of the present invention, the reciprocating drive assembly includes a main shaft rotatably connected to the bottom of the crushing box, the end of the main shaft is fixedly connected to one end of the deflection plate, the other end of the deflection plate is rotatably connected to one end of the connecting rod, the other end of the connecting rod is rotatably connected to a top rod slidably connected to the side wall of the crushing box, the end of the top rod is provided with a T-shaped connector, the end of the transverse plate is provided with a connecting seat slidably connected to the T-shaped connector, a reciprocating drive motor is provided at the bottom of the crushing box, the output shaft of the reciprocating drive motor is fixedly connected to a first bevel gear, and the first bevel gear is meshedly connected to a second bevel gear fixedly connected to the main shaft.

[0009] As a preferred technical solution of the present invention, the part of the crushing roller extending out of the outside of the crushing box is provided with driven gears meshing with each other, a motor support frame is provided outside the crushing box, a crushing drive motor is provided on the motor support frame, and the output shaft of the crushing drive motor is fixedly connected with a driving gear meshing with the driven gear.

[0010] As a preferred technical solution of the present invention, a feed inclined plate inclined toward the center of the feed port is provided on one side of the feed port, and a rotating support is provided on the other side of the feed port. The end of the rotating support is rotatably connected to the feed baffle, and a counterweight block is provided at the end of the feed baffle away from the feed port. The gravity of the counterweight block drives the feed baffle to rotate toward the direction of the feed inclined plate, and when the feed baffle is only acted upon by gravity, the side of the feed baffle is close to the end of the feed inclined plate.

[0011] As a preferred technical solution of the present invention, the exhaust assembly includes an outlet pipe connected to the crushing box, an air pump is provided at the end of the outlet pipe, a debris discharge pipe connected to the outlet pipe is provided in the middle of the outlet pipe, an end cap is detachably connected to the end of the debris discharge pipe, a filter inclined plate is obliquely provided inside the outlet pipe, and the filter inclined plate is located between the debris discharge pipe and the air pump.

[0012] As a preferred technical solution of the present invention, the front of the crushing box is open, and the side wall of the crushing box is rotatably connected with an inspection door.

[0013] The present invention has the following benefits: By arranging flat convex strips and air holes on the transverse plate, the label covering separated by the preliminary crushing mechanism will be separated from the plastic block along with the airflow, so that the impurities contained in the plastic block during the final secondary screening are greatly reduced, which is convenient for subsequent processing and improves the screening efficiency. In addition, due to the setting of the airflow inside the crushing box, dust and other impurities will not fly out when the preliminary crushing mechanism crushes the plastic, thereby better protecting the operating environment of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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 work.

[0015] Figure 1 The figure is a schematic diagram of the structure of a crushing equipment for engineering plastics.

[0016] Figure 2 This is the right side view of a crushing equipment for engineering plastics.

[0017] Figure 3 The figure is a schematic diagram of the structure inside a crushing box in a crushing device for engineering plastics.

[0018] Figure 4 for Figure 3 Front view of .

[0019] Figure 5 The figure is a schematic diagram of the structure of a reciprocating drive assembly in a crushing device for engineering plastics.

[0020] Figure 6 The diagram is a schematic diagram of the structure of a transverse plate and a screen plate in a crushing device for engineering plastics when they are fitted together.

[0021] Figure 7 The diagram is a schematic diagram of the structure of a pulverizing device for engineering plastics after the transverse plate and the screen plate are separated.

[0022] Figure 8 The figure is a schematic diagram of the structure inside the air outlet pipe of a crushing device for engineering plastics.

[0023] Fig. 9 The diagram is a schematic diagram of the structure of a crushing roller in a crushing device for engineering plastics.

[0024] Fig.10 The figure is a schematic diagram of the structure of a feed port in a crushing device for engineering plastics.

[0025] Fig.11 The present invention is a schematic diagram of the structure of a debris removal drawer in a crushing device for engineering plastics.

[0026] In the figure: 1. crushing box; 2. inspection door; 3. feed port; 4. secondary crushing mechanism; 5. primary crushing mechanism; 6. air inlet; 7. air extraction assembly; 8. transverse plate; 9. sieve plate; 10. reciprocating drive assembly; 11. feed arc plate; 12. crushing roller; 13. crushing teeth; 14. connecting seat; 15. T-shaped connector; 16. ejector rod; 17. reciprocating drive motor; 18. connecting rod; 19. first bevel gear; 20. second bevel gear; 21. deflection plate; 22. main shaft; 23. Cutting groove; 24. Flat convex strip; 25. Air vent; 26. Screening hole; 27. Cutter; 28. Guide ramp; 29. ​​Air pump; 30. Exhaust pipe; 31. Filter ramp; 32. Debris discharge pipe; 33. End cover; 34. Suspension beam; 35. Driven gear; 36. Driving gear; 37. Crushing drive motor; 38. Motor support frame; 39. Rotating support; 40. Feed baffle; 41. Feed ramp; 42. Counterweight; 43. Debris discharge port; 44. Debris discharge drawer. 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] In one embodiment, see Figure 1-Figure 11 A crushing device for engineering plastics, comprising a crushing box 1, a feed port 3 is arranged on the side of the top plate of the crushing box 1, the feed port 3 is arranged on the right side of the top plate of the crushing box 1, and an exhaust component 7 is arranged above the left side plate of the crushing box 1, and the gas inside the crushing box 1 is extracted to the outside through the exhaust component 7, and also includes a primary crushing mechanism 5 and a secondary crushing mechanism 4; The preliminary crushing mechanism 5 is arranged at the upper right corner of the crushing box 1, that is, directly below the feed port 3, and includes two synchronously rotating crushing rollers 12 arranged in a front-to-back direction. The crushing rollers 12 are provided with crushing teeth 13 on the outside, and the two crushing teeth 13 on the left and right sides are arranged alternately. The crushing roller 12 on the left rotates clockwise, and the crushing roller 12 on the right rotates counterclockwise. Therefore, when the plastic parts to be crushed fall from the feed port 3, the plastic parts will fall between the two crushing rollers 12, and the crushing teeth 13 will bite into and preliminarily crush the plastic parts. After the crushing is completed, the large pieces of plastic will fall from between the two crushing rollers 12, thereby completing the preliminary crushing of the plastic parts. At this time, the paper covering attached to the surface of the plastic parts will also be separated from the plastics; The secondary crushing mechanism 4 includes two transverse plates 8 and a screen plate 9 which are parallel to each other and closely arranged together. The transverse plate 8 is arranged above the screen plate 9, and the left ends of the transverse plate 8 and the screen plate 9 are arranged to be tilted downward. Multiple rows of screening holes 26 are evenly distributed on the screen plate 9, and multiple front-to-back flat convex strips 24 are arranged on the upper right upper surface of the transverse plate 8, and air holes 25 evenly distributed from front to back are arranged between two adjacent flat convex strips 24, and gas can flow upward through the air holes 25. The transverse plate 8 is slidably connected to the left and right side walls of the crushing box 1, and the transverse plate 8 can move left and right, so when the plastic block and the paper covering fall to After reaching the upper right corner of the transverse plate 8, the plastic block will roll down to the lower left along the transverse plate 8. Since the plastic block needs to cross multiple flat convex strips 24, the plastic block will be bounced up, so that the plastic block can be flat on the transverse plate 8 to avoid accumulation. In the process of the plastic block bouncing up, the paper covering will be blown upward by the air flow blowing upward from the air vents 25, and finally the covering will be discharged from the position of the exhaust component 7. A plurality of front-to-back slitting grooves 23 are arranged on the left side of the transverse plate 8. The slitting grooves 23 are arranged through. When the plastic block falls into the slitting grooves 23, the lower surface of the plastic block will slide with the upper surface of the screen plate 9. When the plastic block slides to the screen After the dividing holes 26 are positioned, the sides of the sieve holes 26 and the dividing grooves 23 will generate shearing force, so that the plastic blocks are cut into small plastic pieces. When the size of the small plastic pieces is smaller than the diameter of the sieve holes 26, they will pass through the sieve plate 9 and fall downward, thereby realizing the secondary crushing of the plastic. In order to improve the crushing effect, a cutter 27 arranged in a front-to-back direction is provided on the left side of the upper surface of the sieve plate 9. The cutter 27 is provided between the sieve holes 26. The cutter 27 and the sides of the dividing grooves 23 form a stronger shearing force, thereby making the plastic crushed more quickly. In addition, an air inlet 6 is provided in the middle of the right side wall of the crushing box 1. The air inlet 6 is provided on the side wall of the crushing box 1. A porous plate, and the air inlet 6 is located below the screen plate 9. Therefore, when the vacuum component 7 performs vacuum processing, the external airflow will enter the interior of the screen plate through the feed port 3 and the air inlet 6. However, the position of the feed port 3 is blocked by the crushing rollers 12 that are close to each other, resulting in a large airflow resistance, so that most of the airflow enters the interior of the crushing box 1 through the air inlet 6, and the airflow passes through the screen plate 9 and the transverse plate 8 from bottom to top, blowing up the paper covering on the transverse plate 8, and the airflow moves the paper covering to the position of the vacuum component 7, achieving the effect of one-time airflow screening, and some small particles of dust will also be taken away, achieving the effect of impurity removal.

[0029] In one case of the present embodiment, a feeding arc plate 11 is provided on one side of the crushing roller 12 close to the center of the crushing box 1, and the upper end of the feeding arc plate 11 is fixed to the middle of the lower surface of the top plate of the crushing box 1, and the lower end of the feeding arc plate 11 is inclined to the right, and a small gap is left between the lower end of the feeding arc plate 11 and the right side wall of the crushing box 1, and the plastic blocks crushed by the crushing roller 12 will slide to the lower right along the feeding arc plate 11, and finally fall to the upper right side of the transverse plate 8, and the plastic blocks will slide to the left along the upper surface of the transverse plate 8. At the same time, since the air flow enters through the air inlet 6 and moves to the position of the exhaust component 7, the air flow velocity at the gap between the feeding arc plate 11 and the right side wall of the crushing box 1 is relatively large, achieving a certain exhaust effect, so that the plastic is continuously subjected to downward suction during the process of being crushed by the crushing roller 12, thereby preventing impurities such as dust from flying out through the feed port 3 during the crushing process, thereby avoiding dust pollution.

[0030] In one case of the present embodiment, a material guide inclined plate 28 is provided at the bottom of the crushing box 1. The material guide inclined plate 28 is an L-shaped structure. The material guide inclined plate 28 includes an inclined plate inclined toward the upper left, and the left end of the inclined plate is fixedly connected to the lower part of the left side wall of the crushing box 1. The right side of the material guide inclined plate 28 is a downward vertical plate, and the lower end of the vertical plate is fixedly connected to the bottom plate of the crushing box 1. Therefore, the material guide inclined plate 28 and the left side wall and bottom plate of the crushing box 1 enclose a space, and a reciprocating drive assembly 10 is arranged in this space, and the reciprocating drive assembly 10 can push the transverse plate 8 to move left and right.

[0031] In one case of the present embodiment, the reciprocating drive assembly 10 includes a main shaft 22 that is connected to the bottom plate of the crushing box 1, the upper end of the main shaft 22 is fixedly connected to one end of the deflection plate 21, the other end of the deflection plate 21 is rotatably connected to the right end of the connecting rod 18, the left end of the connecting rod 18 is rotatably connected to the right end of the top rod 16 arranged in a left-right direction, the middle part of the top rod 16 is slidably connected to the lower side wall of the crushing box 1, the left end of the top rod 16 is fixedly connected to the lower end of the T-shaped connector 15, and a U-shaped connecting seat 14 is provided at the left end of the lower surface of the transverse plate 8, and both sides of the connecting seat 14 are slidably connected to the upper end of the T-shaped connector 15. The T-shaped connector 15 and the connecting seat 14 are connected, so the T-shaped connector 15 and the connecting seat 14 can slide up and down relatively. When the T-shaped connector 15 moves left and right, the transverse plate 8 will move left and right with it. A reciprocating drive motor 17 is arranged on the left side of the bottom plate of the crushing box 1. The output shaft of the reciprocating drive motor 17 is fixedly connected to the first bevel gear 19, and the first bevel gear 19 is meshed and connected to the second bevel gear 20. The second bevel gear 20 is fixedly connected to the lower end of the main shaft 22. Therefore, the reciprocating drive motor 17 drives the main shaft 22 to rotate through the gear transmission, and the main shaft 22 drives the transverse plate 8 to move left and right through the connecting rod 18, the deflection plate 21 and the top rod 16.

[0032] In one case of the present embodiment, a debris discharge port 43 is provided at the lower portion of the right side wall of the crushing box 1, the debris discharge port 43 is located below the air inlet 6, and the debris discharge port 43 is inserted into a debris discharge drawer 44, and the debris discharge drawer 44 is lower than the inclined plate of the material guide inclined plate 28. Therefore, when the screened plastic pieces slide to the right along the inclined plate above the material guide inclined plate 28, the plastic pieces will eventually fall into the debris discharge drawer 44, thereby realizing the final material collection process.

[0033] In one case of the present embodiment, the rear end of the crushing roller 12 extends out of the back plate of the crushing box 1, and the rear end of the crushing roller 12 is fixedly connected to the driven gear 35, and the left and right driven gears 35 are meshed and connected with each other, so that the left and right crushing rollers 12 rotate synchronously and in opposite directions. A motor support frame 38 is arranged on the outer side of the back plate of the crushing box 1, and a crushing drive motor 37 is arranged on the motor support frame 38. The output shaft of the crushing drive motor 37 is fixedly connected to the driving gear 36, and the driving gear 36 is meshed and connected with the driven gear 35 on one side, so that the crushing drive motor 37 drives the two crushing rollers 12 to rotate at the same time through gear transmission.

[0034] In one case of the present embodiment, a feed inclined plate 41 inclined to the lower left is provided on the right side of the feed port 3, and a rotating support 39 is vertically provided on the left side of the feed port 3. The upper end of the rotating support 39 is rotatably connected to the middle part of the lower surface of the feed baffle 40, and a counterweight block 42 is provided on the left side of the lower surface of the feed baffle 40. The gravity of the counterweight block 42 will drive the feed baffle 40 to rotate counterclockwise. When the feed baffle 40 is only affected by gravity, after the feed baffle 40 rotates counterclockwise, the side of the feed baffle 40 will be blocked because it is pressed against the lower end of the feed inclined plate 41. At this time, the feed port 3 will be blocked by the feed inclined plate 41 and the feed baffle 40, thereby increasing the air tightness. This allows the air duct inside the crushing box 1 to better enter from the air inlet 6 and be discharged from the exhaust assembly 7. However, when the operator puts in the plastic parts, the plastic parts slide to the lower left along with the feed ramp 41. At this time, the feed baffle 40 rotates clockwise, and the plastic parts will fall between the two crushing rollers 12. The feed ramp 41 and the feed baffle 40 also have a protective effect, preventing the operator's hands from touching the crushing rollers 12 and getting injured. At the same time, the maximum clockwise rotation angle of the feed baffle 40 is only the vertical state, because after the feed baffle 40 rotates to the vertical state, it will interfere with the rotating support 39, thereby avoiding the problem that the feed baffle 40 cannot be reset after being flipped.

[0035] In one case of the present embodiment, the exhaust assembly 7 includes an air outlet pipe 30 connected to the pulverizing box 1, the air outlet pipe 30 is horizontally arranged on the upper part of the left side wall of the pulverizing box 1, the right end of the air outlet pipe 30 is connected to the inside of the pulverizing box 1, an air pump 29 is arranged at the left end of the air outlet pipe 30 for exhaust, and an exhaust pipe 32 is vertically arranged in the middle part of the lower side of the air outlet pipe 30, the upper end of the exhaust pipe 32 is connected to the air outlet pipe 30, and the lower end of the exhaust pipe 32 is detachably connected to the end cover 33, and a filter inclined plate 31 inclined toward the lower left is arranged on the left side of the air outlet pipe 30. Therefore, after the airflow enters the air outlet pipe 30 from the pulverizing box 1, the airflow is filtered by the filter inclined plate 31 and then discharged through the air pump 29. The paper covering cannot pass through the filter inclined plate 31 and will slide down into the exhaust pipe 32. After working for a period of time, the end cover 33 can be opened to clean the exhaust pipe 32. A suspension beam 34 is provided on the left side of the top of the crushing box 1 , and the air pump 29 is fixed by the suspension beam 34 , so that the air pump 29 can remain stable during operation.

[0036] In one case of this embodiment, the front of the crushing box 1 is open, and the side wall of the crushing box 1 is rotatably connected with an inspection door 2. The inspection door 2 can be rotated around the front end of the left side wall of the crushing box 1. When the inside of the crushing box 1 needs to be repaired or cleaned, the inspection door 2 can be directly opened, and a sealing rubber ring is provided on the outside of the inspection door 2. When the inspection door 2 is buckled on the front of the crushing box 1, the air pump 29 continuously draws air to the outside when the crushing box 1 is working, that is, the internal air pressure of the crushing box 1 is lower than that of the outside, so that the inspection door 2 can be pressed against the outside of the crushing box 1 under the action of atmospheric pressure to achieve a sealed effect. In order to improve stability, a lock is provided between the crushing box 1 and the inspection door 2, and the inspection door 2 and the crushing box 1 are fixed by the lock.

[0037] During the implementation of this embodiment, the crushing drive motor 37 and the reciprocating drive motor 17 are powered on and perform normal driving operations. At the same time, the air pump 29 is started, and the air flow inside the crushing box 1 passes through the screen plate 9 and the transverse plate 8 from bottom to top, and the entire equipment is ready.

[0038] The operator puts the plastic parts that need to be crushed along the feed inclined plate 41, and the plastic parts fall between the two crushing rollers 12. The plastic parts are crushed into large plastic blocks, and the label covering is separated from the plastic blocks. At this time, the plastic blocks and the label covering fall along the feed arc plate 11 to the upper right of the transverse plate 8. The transverse plate 8 moving left and right continuously drives the plastic blocks and the label covering to jump, so that the label covering and the plastic blocks pass over the flat convex strips 24 and slide to the lower left along the transverse plate 8. During the movement, the air flow flows upward through the air vents 25. At this time, the label covering will move upward with the air flow due to its low density, and the label covering will move to the air outlet pipe 30. The filter inclined plate 31 blocks the label covering, and the label covering moves downward along the filter inclined plate 31 and falls into the impurity discharge pipe 32, waiting for subsequent cleaning work.

[0039] After the plastic block slides to the cutting groove 23, the bottom of the plastic block will fall on the screen plate 9, and the plastic block will continue to move left and right with the transverse plate 8. During the movement, the cutting groove 23, the cutter 27 and the screening hole 26 form a shear force, and the plastic block will be shredded again. After shredding, the particles smaller than the size of the screening hole 26 will fall onto the guide inclined plate 28, and the plastic particles will slide to the lower right along the guide inclined plate 28, and the plastic particles will eventually fall into the impurity discharge drawer 44, thereby completing the entire plastic crushing process.

[0040] The present invention is applicable to a crushing device for engineering plastics. By arranging flat convex strips 24 and air holes 25 on the transverse plate 8, the label covering separated by the preliminary crushing mechanism 5 will be separated from the plastic block along with the airflow, so that the impurities contained in the plastic block during the final secondary screening are greatly reduced, which is convenient for subsequent processing and improves the screening efficiency. In addition, due to the setting of the airflow inside the crushing box 1, when the preliminary crushing mechanism 5 crushes the plastic, no impurities such as dust will fly out, thereby better protecting the operating environment of the equipment.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A crushing device for engineering plastics, comprising a crushing box, a feed inlet is arranged on the side of the top plate of the crushing box, and the characteristics are: A suction assembly is arranged on one side of the top of the crushing box away from the feed inlet, and also includes a primary crushing mechanism and a secondary crushing mechanism; The preliminary crushing mechanism is arranged on one side of the crushing box close to the feed inlet, and comprises two crushing rollers rotatably connected to the crushing box, and crushing teeth are arranged on the outside of the crushing rollers; The secondary crushing mechanism includes a transverse plate and a screen plate arranged in parallel with each other. The screen plate is arranged on the side of the transverse plate close to the bottom of the crushing box, and the side of the screen plate away from the feed port is inclined toward the bottom of the crushing box. Screening holes are arranged on the screen plate. The transverse plate is slidably connected to the side wall of the crushing box, and a flat convex strip perpendicular to the moving direction of the transverse plate is arranged on the side of the transverse plate close to the feed port. Air holes are arranged between two adjacent flat convex strips, and a cutting groove matching the screening holes is arranged on the side of the transverse plate away from the feed port. An air inlet located below the sieve plate is arranged on the side wall of the crushing box, and external air enters the interior of the crushing box through the air inlet. The airflow passes through the sieve plate and the transverse plate and is discharged through the exhaust assembly.

2. A crushing device for engineering plastics according to claim 1, characterized in that: A feeding arc plate is arranged on one side of the crushing roller close to the center of the crushing box, one end of the feeding arc plate is connected to the top plate of the crushing box, and a gap is left between the other end of the feeding arc plate and the side wall of the crushing box.

3. The crushing equipment for engineering plastics according to claim 1, characterized in that: The slitting groove is arranged in parallel with the flattening convex strip, and a cutter matched with the slitting groove is arranged on the sieve plate, and the cutter is arranged between two adjacent sieving holes.

4. The pulverizing equipment for engineering plastics according to claim 1, characterized in that: The bottom of the crushing box is provided with a material guiding inclined plate, and a reciprocating driving component for driving the transverse moving plate to move back and forth is provided between the material guiding inclined plate and the bottom of the crushing box.

5. A crushing device for engineering plastics according to claim 4, characterized in that: The bottom of the side wall of the crushing box is provided with a debris discharge port, which is located below the air inlet, and the debris discharge port is detachably connected with a debris discharge drawer matched with the material guide inclined plate.

6. The pulverizing equipment for engineering plastics according to claim 4, characterized in that: The reciprocating drive assembly includes a main shaft rotatably connected to the bottom of the crushing box, an end of the main shaft is fixedly connected to one end of a deflection plate, the other end of the deflection plate is rotatably connected to one end of a connecting rod, the other end of the connecting rod is rotatably connected to a top rod slidably connected to the side wall of the crushing box, a T-shaped connector is provided at the end of the top rod, and a connecting seat slidably connected to the T-shaped connector is provided at the end of the transverse plate; a reciprocating drive motor is provided at the bottom of the crushing box, and an output shaft of the reciprocating drive motor is fixedly connected to a first bevel gear, and the first bevel gear is meshedly connected to a second bevel gear fixedly connected to the main shaft.

7. The pulverizing equipment for engineering plastics according to claim 1, characterized in that: The part of the crushing roller extending out of the outside of the crushing box is provided with driven gears meshing with each other, the outside of the crushing box is provided with a motor support frame, the motor support frame is provided with a crushing drive motor, and the output shaft of the crushing drive motor is fixedly connected with a driving gear meshing with the driven gear.

8. The pulverizing equipment for engineering plastics according to claim 1, characterized in that: A feed inclined plate inclined toward the center of the feed port is arranged on one side of the feed port, and a rotating support is arranged on the other side of the feed port. The end of the rotating support is rotatably connected to the feed baffle. A counterweight block is arranged on the end of the feed baffle away from the feed port. The gravity of the counterweight block drives the feed baffle to rotate toward the direction of the feed inclined plate, and when the feed baffle is only acted upon by gravity, the side surface of the feed baffle is close to the end of the feed inclined plate.

9. The pulverizing equipment for engineering plastics according to claim 1, characterized in that: The exhaust assembly includes an air outlet pipe connected to the crushing box, an air pump is arranged at the end of the air outlet pipe, a debris discharge pipe connected to the air outlet pipe is arranged in the middle of the air outlet pipe, an end cap is detachably connected to the end of the debris discharge pipe, a filter inclined plate is obliquely arranged inside the air outlet pipe, and the filter inclined plate is located between the debris discharge pipe and the air pump.

10. The pulverizing equipment for engineering plastics according to claim 1, characterized in that: The front of the crushing box is open, and a side wall of the crushing box is rotatably connected with an inspection door.

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