Crushing device for plastic granulation production

Abstract

The invention discloses a crushing device for plastic granulation production, and relates to the field of plastic granulation, the crushing device comprises a crusher, the crusher is provided with a motor and two rotating shafts, the motor is located on the side surface of the crusher, the rotating shafts are in transmission connection through a transmission belt, and the rotating shafts are provided with crushing rollers in the crusher. The two sets of crushing rollers are meshed with each other, two sets of lifting air cylinders are installed on the back face of the crusher, and the output ends of the lifting air cylinders are both connected with bridge plates. Through the arrangement of the lifting air cylinder and the pressing plate, in the using process, when the number of foam materials in the feeding port of the crusher is large, the pressing plate is started to move downwards to extrude foam, the material crushing efficiency of the crushing roller is improved, when the pressing plate moves downwards, foam particles attached to the inner wall of the crusher can be pushed downwards through a side plate, and therefore the foam particles can be effectively crushed. And the situation that foam particles are melted and attached to the inner wall of equipment due to long-time high temperature is avoided, and the cleaning effect is improved.

Description

Technical Field

[0001] This invention relates to the field of plastic granulation, specifically to a crushing device for plastic granulation production. Background Technology

[0002] Crushing devices for plastic granulation production are key equipment in plastic recycling and granulation production lines. Their main function is to reduce the size of waste plastics or scraps and defective products from the production process, so that they meet the uniform particle size requirements of the granulator, providing qualified raw materials for subsequent processes such as melt extrusion and pelletizing.

[0003] Existing technologies, such as the Chinese patent CN210148497U, disclose a foam plastic recycling crusher that can limit the splashing foam debris through the action of a reset spring and a movable baffle, and can improve the crushing efficiency through multiple sets of blades. Existing technologies, such as CN214645052U, disclose a waste foam plastic recycling crushing device that uses multiple sets of rotating rollers to crush the foam in different ways.

[0004] However, in the current technology, the foam debris generated during the crushing process not only splashes out, but also adheres to the inner wall of the equipment or other locations due to static electricity. Prolonged friction and the high temperature during crushing cause the foam to melt and solidify on the inner wall of the equipment, making it difficult to clean. In subsequent processing, airflow is usually used to clean the crushed foam particles. However, the airflow cannot effectively clean the foam adhering to the crushing roller, and the temperature generated by the friction of the crushing roller during long-term rotation also makes it difficult to clean the foam in the grooves on the side of the crushing roller. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a crushing device for plastic granulation production to solve the technical problems of inconvenient cleaning and poor air cleaning effect.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a crushing device for plastic granulation production, comprising a crusher, wherein the crusher is equipped with a motor and a rotating shaft, the motor being located on the side of the crusher, and two sets of rotating shafts being connected by a transmission belt, wherein crushing rollers are installed inside the crusher and the two sets of crushing rollers mesh with each other, and two sets of lifting cylinders are installed on the back of the crusher, wherein the output ends of the lifting cylinders are connected to bridge plates, and the bridge plates are connected to connecting rods at the top of the crusher, wherein a pressure plate is installed at the bottom of the connecting rods, and a guide plate is installed at the bottom of the pressure plate, wherein the guide plate is hollow inside, and positive ion rods are installed inside the guide plate, wherein the positive ion rods are fixed inside the guide plate by fixing plates on both sides, and both sides of the guide plate are provided with permeable metal plates, wherein when the pressure plate enters the crusher, the guide plate is located between the two sets of crushing rollers.

[0007] By adopting the above technical solution, foam can be easily crushed. During the crushing process, the foam is squeezed by the pressure plate to improve the crushing efficiency. Positive ions are generated by the positive ion rod and blown into the crusher by the guide plate to eliminate the static electricity carried by the foam particles and reduce the adhesion of foam particles.

[0008] The present invention is further configured such that a support foot is installed on the outer side of the bottom end of the crusher, and a conductive structure is installed on the inner wall of the support foot. A discharge port is installed at the bottom end of the crusher, and an upper discharge hole is opened at the top of the discharge port. A side discharge hole is connected to the side of the discharge port. Usually, only one set of the upper discharge hole and the side discharge hole is opened, and the other set is sealed by a fixing bolt.

[0009] Preferably, the broken foam particles can be easily transferred to a suitable location.

[0010] The invention is further configured such that a mounting plate is provided on the back of the crusher, a fixing frame is installed on the outer side of the mounting plate, the lifting cylinder is fixedly connected to the mounting plate through the fixing frame, a clamping plate is installed on the mounting plate between two sets of fixing frames, and an adjustable clamping claw is provided on the outer wall of the clamping plate.

[0011] Preferably, it facilitates the limiting and fixing of auxiliary structures such as lifting cylinders, and the pipe can be limited by clamps and claws.

[0012] The invention is further configured such that a counterweight is installed at the end of the bridge plate away from the pressure plate, and the weight of the counterweight can be adjusted.

[0013] Preferably, this facilitates weight balancing of the bridge deck.

[0014] The present invention is further configured such that an air inlet box is installed at the top of the pressure plate, an air pipe and a wire are connected to the top of the air inlet box, a connecting joint is installed at the bottom of the air pipe, the air pipe is connected to the air inlet box through the connecting joint, and the wire extends into the interior of the guide plate and is connected to the positive ion rod.

[0015] Preferably, the air intake box can provide sufficient airflow to the guide plate to facilitate the entry of positive ions into the crusher.

[0016] The invention is further configured such that the outer wall of the pressure plate is provided with a side plate, the inner wall of the side plate is provided with a slot, the side plate is engaged with the pressure plate through the slot, and a metal plate is provided at the bottom of the outer wall of the side plate, the metal plate having an arc plate structure.

[0017] Preferably, it allows for easy scraping and cleaning of the inner wall of the crusher, while reducing wear.

[0018] The invention is further configured such that the pressure plate is provided with an air groove below the air intake box, and the guide plate is fixed directly below the air groove, and the air intake box is connected to the guide plate through the air groove.

[0019] Preferably, airflow is conveniently introduced into the interior of the deflector.

[0020] The present invention is further configured such that an extrusion head is provided at the bottom end of the guide plate, the extrusion head extrudes the foam downward, and a cavity is provided inside the guide plate. A breathable metal plate is inclinedly fixed to the outer wall of the extrusion head and is connected to the cavity.

[0021] Preferably, the foam can be squeezed by the extrusion head when the pressure plate is pressed downwards, reducing damage to the breathable metal plate.

[0022] The present invention is further configured such that the breathable metal plate is a breathable metal mesh structure, and the breathable metal plate is aligned and attached to the outer wall of the guide plate.

[0023] Preferably, the airflow can be easily discharged from the breathable metal plate, thereby cleaning the foam particles.

[0024] The present invention is further configured such that the outer wall of the breathable metal plate is provided with multiple sets of protruding scrapers, and the protruding scrapers have a hollow structure in the middle. A metal mesh is installed at the connection position of the protruding scrapers, the metal mesh is aligned with the outer wall of the protruding scrapers, and the multiple sets of protruding scrapers are aligned with the gap between the crushing teeth of the crushing roller.

[0025] Preferably, the protruding scraper can be inserted deep between the crushing teeth of the crushing roller for further cleaning and to improve the cleaning effect.

[0026] In summary, the present invention has the following main beneficial effects:

[0027] 1. This invention, through the setting of lifting cylinder and pressure plate, can activate the pressure plate to move downward during use when there is a lot of foam material inside the crusher feed inlet, to squeeze the foam, improve the crushing efficiency of the crushing roller on the material, and when the pressure plate moves downward, it will push the foam particles attached to the inner wall of the crusher downward through the side plate, thereby cleaning the inner wall of the crusher, avoiding prolonged high temperature that would cause the foam particles to melt and adhere to the inner wall of the equipment, thus improving the cleaning effect.

[0028] 2. The present invention, through the setting of the guide plate and the positive ion rod, can continuously blow air into the foam when the pressure plate squeezes the foam, eliminating the static electricity of the untreated foam. When the foam is completely squeezed, the guide plate is located between the two sets of crushing rollers, and the sprayed air enters the crushing teeth of the crushing rollers, thereby further cleaning the crushing rollers, causing the attached foam particles to fall off, avoiding the foam particles from solidifying in the crushing rollers, and improving the cleaning effect. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the structure on the back of the present invention;

[0031] Figure 3 This is a schematic diagram of the internal structure of the pulverizer of the present invention;

[0032] Figure 4 This is a schematic diagram of the lifting cylinder and pressure plate of the present invention;

[0033] Figure 5 This is a schematic cross-sectional view of the guide plate of the present invention;

[0034] Figure 6 This is an exploded structural diagram of the pressure plate of the present invention;

[0035] Figure 7 This is a schematic diagram of the side plate of the present invention;

[0036] Figure 8 This is a schematic diagram of the structure of the guide plate according to the second embodiment of the present invention;

[0037] Figure 9 This is a schematic diagram of the structure of the protruding scraper in the second embodiment of the present invention.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Crusher; 101. Support leg; 102. Discharge port; 1021. Upper discharge hole; 1022. Side discharge hole; 103. Mounting plate; 104. Fixing frame; 2. Motor; 3. Rotating shaft; 4. Crushing roller; 5. Lifting cylinder; 501. Bridge plate; 502. Connecting rod; 503. Counterweight; 6. Pressure plate; 601. Side plate; 6011. Slot; 6012. Metal plate; 602. Air groove; 7. Air inlet box; 701. Air pipe; 702. Wire; 703. Connecting joint; 8. Clamping plate; 801. Gripper; 9. Guide plate; 901. Extrusion head; 902. Cavity; 10. Breathable metal plate; 1001. Protruding scraper; 1002. Metal mesh; 11. Positive ion rod; 12. Fixing plate. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0041] The embodiments of the present invention will now be described.

[0042] Example 1, please refer to Figure 1 and Figure 2 A crushing device for plastic granulation production includes a crusher 1, a motor 2 and a rotating shaft 3. The motor 2 is located on the side of the crusher 1. There are two sets of rotating shafts 3 connected by a transmission belt. Crushing rollers 4 are installed inside the crusher 1, and the two sets of crushing rollers 4 mesh with each other, which can easily drive the crushing rollers 4 to rotate, thereby crushing foam. A support foot 101 is installed on the outer side of the bottom end of the crusher 1. A conductive structure is installed on the inner wall of the support foot 101. A discharge port 102 is installed at the bottom end of the crusher 1. An upper discharge hole 1021 is opened at the top of the discharge port 102. A side discharge hole 1022 is connected to the side of the discharge port 102. Usually, only one set of the upper discharge hole 1021 and the side discharge hole 1022 is opened, and the other set is sealed by a fixing bolt, so that the crushed foam particles can be discharged through different discharge holes.

[0043] Please see Figure 2 Two sets of lifting cylinders 5 are installed on the back of the crusher 1. An installation plate 103 is provided on the back of the crusher 1. A fixing frame 104 is installed on the outer side of the installation plate 103. The lifting cylinders 5 are fixedly connected to the installation plate 103 through the fixing frame 104, which facilitates the installation of the lifting cylinders 5. A clamping plate 8 is installed between the two sets of fixing frames 104 on the installation plate 103. An adjustable clamping claw 801 is provided on the outer wall of the clamping plate 8, which can clamp and limit the discharge pipe to reduce shaking. The output end of the lifting cylinders 5 is connected to a bridge plate 501. A connecting rod 502 is connected to the top of the bridge plate 501. A counterweight 503 is installed at the end of the bridge plate 501 away from the pressure plate 6. The weight of the counterweight 503 can be adjusted to ensure the weight balance of the bridge plate 501.

[0044] Please see Figures 1 to 7A pressure plate 6 is installed at the bottom of the connecting rod 502, and an air inlet box 7 is installed at the top of the pressure plate 6. An air pipe 701 and a wire 702 are connected to the top of the air inlet box 7. A connecting connector 703 is installed at the bottom of the air pipe 701, and the air pipe 701 is connected to the air inlet box 7 through the connecting connector 703. A side plate 601 is provided on the outer wall of the pressure plate 6, and a slot 6011 is provided on the inner wall of the side plate 601. The side plate 601 is connected to the air inlet box 7 through the slot 6011. The pressure plate 6 engages, and a metal plate 6012 is provided at the bottom of the outer wall of the side plate 601. The metal plate 6012 has an arc plate structure, which facilitates the removal of foam particles from the inner wall of the crusher 1. The pressure plate 6 is located below the air inlet box 7 and has an air groove 602. The guide plate 9 is fixed directly below the air groove 602. The bottom end of the pressure plate 6 is equipped with the guide plate 9. The air inlet box 7 is connected to the guide plate 9 through the air groove 602. The interior of the guide plate 9... The guide plate 9 is hollow and has a positive ion rod 11 installed inside. A wire 702 extends into the guide plate 9 and connects with the positive ion rod 11. The positive ion rod 11 is fixed to the inside of the guide plate 9 by fixing plates 12 on both sides. An extrusion head 901 is provided at the bottom of the guide plate 9. The extrusion head 901 extrudes the foam downward. A cavity 902 is provided inside the guide plate 9. A breathable metal plate 10 is inclined and fixed to the outer wall of the extrusion head 901 and connected to the cavity 902. Breathable metal plates 10 are provided on both sides of the guide plate 9. The breathable metal plate 10 has a breathable metal mesh structure and is aligned and attached to the outer wall of the guide plate 9. When the pressure plate 6 enters the crusher 1, the guide plate 9 is located between the two sets of crushing rollers 4. It can blow airflow into the gap between the crushing teeth in the crushing rollers 4, thereby eliminating the static electricity of the foam particles through the positive ion airflow and reducing adhesion.

[0045] Example 2, please refer to Figure 8 and Figure 9 This is the second embodiment of the present application, which differs in that the structure of the breathable metal plate 10 is different. Specifically, the outer wall of the breathable metal plate 10 has multiple sets of protruding scrapers 1001, and the middle of the protruding scrapers 1001 is hollow. A metal mesh 1002 is installed at the connection position of the protruding scrapers 1001. The metal mesh 1002 is aligned with the outer wall of the protruding scrapers 1001, and the multiple sets of protruding scrapers 1001 are all aligned with the gap between the crushing teeth of the crushing roller 4. Thus, when the guide plate 9 is located between the two sets of crushing rollers 4, the protruding scrapers 1001 can penetrate into the gap between the crushing teeth (without adhering to the inner wall of the crushing teeth) to clean and scrape off some of the viscous residues adhering to the crushing teeth, thereby improving the cleaning effect. In addition, the positive ion airflow sprayed out can effectively increase the positive ion density after convergence, thereby improving the electrostatic removal effect on foam particles.

[0046] During assembly, the present invention first fixes each set of lifting cylinders 5 onto the mounting plate 103. Then, the bridge plate 501 is installed on the output end of the lifting cylinders 5. Next, the pressure plate 6 is fixed to the bottom end of the connecting rod 502 and aligned with the feed inlet of the crusher 1 to facilitate the entry of the pressure plate 6 into the crusher 1. Then, the guide plate 9 is installed below the air trough 602, with the output end of the positive ion rod 11 facing upward. The positive ion rod 11 is powered through the wire 702. Then, the air inlet box 7 is placed on the air trough 602 and connected to the air pipe 701 through the connecting joint 703 to connect the external air source to the air inlet box 7 and the guide plate 9, thus realizing the assembly of the equipment.

[0047] In operation, firstly, the lifting cylinder 5 is activated, moving the pressure plate 6 above the crusher 1. At this time, the feed inlet of the crusher 1 opens, and foam waste is continuously injected into the crusher 1 through external transport equipment. However, the foam is relatively light, and when the crushing roller 4 rotates inside the crusher, it will be squeezed out due to the pressure. When the foam in the feed inlet is full, the lifting cylinder 5 is activated, driving the pressure plate 6 downward through the bridge plate 501. At the same time, the current to the positive ion rod 11 is turned on, and the air source of the air pipe 701 is connected. The airflow enters the guide plate 9 through the air groove 602 and blows over the positive ion rod 11 along the cavity 902, forming a positive ion airflow. The positive ion airflow is discharged through the permeable metal plate 10. At this time, the pressure plate 6 moves downward, squeezing the foam in the feed inlet downward, so that the foam fully contacts the crushing roller 4, improving the crushing efficiency. Furthermore, the outer wall of the pressure plate 6 is provided with a side plate 601, which can push the foam particles attached to the inner wall of the feed inlet downwards, preventing the foam particles from adhering to the inner wall of the crusher and improving the cleaning effect. When the pressure plate squeezes the remaining foam to the lowest end, the guide plate 9 is located between the two sets of crushing rollers 4, and the airflow is aligned with the gap between the crushing rollers 4. The airflow blows into the gap, and the positive ion airflow can effectively neutralize the negatively charged particles on the foam particles and effectively remove the static electricity carried by the foam particles. This can also remove the foam particles attached to the inner wall of the crushing rollers 4. The airflow can pass through the crushing rollers 4 and flow to the material plate at the bottom of the crusher 1, allowing the material to enter the discharge port 102. The discharge port 102 sends the material into the subsequent processing equipment through the upper discharge hole 1021, improving the discharge efficiency.

[0048] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A crushing device for plastic granulation production, comprising a crusher (1), wherein the crusher (1) is equipped with a motor (2) and a rotating shaft (3), the motor (2) being located on the side of the crusher (1), the rotating shaft (3) having two sets connected by a transmission belt, and crushing rollers (4) being installed inside the crusher (1) on the rotating shaft (3), wherein the two sets of crushing rollers (4) mesh with each other, characterized in that: Two sets of lifting cylinders (5) are installed on the back of the crusher (1). The output end of each lifting cylinder (5) is connected to a bridge plate (501). The bridge plate (501) is located at the top of the crusher (1) and connected to a connecting rod (502). A pressure plate (6) is installed at the bottom of the connecting rod (502). A guide plate (9) is installed at the bottom of the pressure plate (6). The guide plate (9) is hollow inside. A positive ion rod (11) is installed inside the guide plate (9). The positive ion rod (11) is fixed inside the guide plate (9) by a fixing plate (12) on both sides. A permeable metal plate (10) is opened on both sides of the guide plate (9). When the pressure plate (6) enters the crusher (1), the guide plate (9) is located between the two sets of crushing rollers (4).

2. The crushing device for plastic granulation production according to claim 1, characterized in that: The crusher (1) has a support foot (101) installed on the outer side of its bottom end. The inner wall of the support foot (101) is equipped with a conductive structure. The bottom end of the crusher (1) is equipped with a discharge port (102). The top of the discharge port (102) is provided with an upper discharge hole (1021). The side of the discharge port (102) is connected with a side discharge hole (1022). Usually, only one set of the upper discharge hole (1021) and the side discharge hole (1022) is opened, and the other set is sealed by a fixing bolt.

3. The crushing device for plastic granulation production according to claim 1, characterized in that: The crusher (1) has an installation plate (103) on its back. A fixing frame (104) is installed on the outside of the installation plate (103). The lifting cylinder (5) is fixedly connected to the installation plate (103) through the fixing frame (104). The installation plate (103) is located between two sets of fixing frames (104) and a clamping plate (8) is installed. The outer wall of the clamping plate (8) is provided with an adjustable clamping claw (801).

4. The crushing device for plastic granulation production according to claim 1, characterized in that: The bridge plate (501) is equipped with a counterweight (503) at the end away from the pressure plate (6), and the weight of the counterweight (503) can be adjusted.

5. The crushing device for plastic granulation production according to claim 1, characterized in that: An air inlet box (7) is installed at the top of the pressure plate (6). An air pipe (701) and a wire (702) are connected to the top of the air inlet box (7). A connecting joint (703) is installed at the bottom of the air pipe (701). The air pipe (701) is connected to the air inlet box (7) through the connecting joint (703). The wire (702) extends into the interior of the guide plate (9) and is connected to the positive ion rod (11).

6. The crushing device for plastic granulation production according to claim 1, characterized in that: The outer wall of the pressure plate (6) is provided with a side plate (601), and the inner wall of the side plate (601) is provided with a slot (6011). The side plate (601) is engaged with the pressure plate (6) through the slot (6011). The bottom of the outer wall of the side plate (601) is provided with a metal plate (6012), which is an arc plate structure.

7. The crushing device for plastic granulation production according to claim 5, characterized in that: The pressure plate (6) is located below the air inlet box (7) and has an air groove (602). The guide plate (9) is fixed directly below the air groove (602). The air inlet box (7) is connected to the guide plate (9) through the air groove (602).

8. The crushing device for plastic granulation production according to claim 1, characterized in that: The bottom end of the guide plate (9) is provided with an extrusion head (901), which extrudes the foam downward. The guide plate (9) has a cavity (902) inside. The breathable metal plate (10) is fixed at an angle to the outer wall of the extrusion head (901) and is connected to the cavity (902).

9. The crushing device for plastic granulation production according to claim 1, characterized in that: The breathable metal plate (10) is a breathable metal mesh structure, and the breathable metal plate (10) is aligned and attached to the outer wall of the guide plate (9).

10. A crushing device for plastic granulation production according to claim 1, characterized in that: The outer wall of the breathable metal plate (10) is provided with multiple sets of protruding scrapers (1001), and the protruding scrapers (1001) have a hollow structure in the middle. A metal mesh (1002) is installed at the connection position of the protruding scrapers (1001). The metal mesh (1002) is aligned with the outer wall of the protruding scrapers (1001), and the multiple sets of protruding scrapers (1001) are aligned with the gap between the crushing teeth of the crushing roller (4).

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