A polyethylene plastic pellet crusher

Abstract

This utility model relates to the field of crusher technology, specifically to a polyethylene plastic pellet crusher, comprising a shell, a crushing chamber, equipment chambers located on both sides of the crushing chamber, and a collection chamber located below the crushing chamber and equipment chambers. Rotatable crushing rollers are arranged opposite each other within the crushing chamber. A drive assembly for driving the crushing rollers to rotate is located within the equipment chambers. A screening assembly is located within the collection chamber, comprising a screening frame and a screen that can be pulled out and placed within the screening frame. A vibrating assembly for driving the screening frame to shake is located within the equipment chamber. The drive assembly operates to drive the vibrating assembly. By driving the crushing rollers to rotate through the drive assembly, the plastic pellets are crushed. Simultaneously, the drive assembly drives the vibrating assembly to drive the screening frame and screen to shake up and down within the collection chamber, preventing the accumulation of plastic powder on the screen, thereby ensuring the screening effect of the screening assembly on the plastic powder.

Description

Technical Field

[0001] This utility model relates to the field of crusher technology, and more specifically, to a polyethylene plastic pellet crusher. Background Technology

[0002] Polyethylene (PE) is a thermoplastic plastic made from ethylene monomers through a polymerization reaction. It is one of the most widely produced and used plastics in the world. In the production of polyethylene plastic products, polyethylene plastic granules need to be crushed, which requires the use of a crusher.

[0003] Currently, roller mills are commonly used for crushing polyethylene plastics. The principle is that two relatively rotating rollers (usually made of metal, with surfaces that can be smooth or textured) apply extrusion and shearing forces to the material, causing it to break down and grind into smaller particles or powder. In existing crushers, to ensure the crushed plastic powder is sieved to the desired particle size, a screen is typically installed inside the crusher to separate the powder. However, in actual use, the screen is mostly fixed inside the crusher, and the crushed plastic powder directly enters the screen, easily accumulating on it and affecting the sieving effect. Utility Model Content

[0004] The purpose of this invention is to provide a polyethylene plastic pellet crusher to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A polyethylene plastic pellet crusher includes a shell, a crushing chamber, equipment chambers located on both sides of the crushing chamber, and a collection chamber located below the crushing chamber and equipment chamber. Rotatable crushing rollers are arranged opposite each other in the crushing chamber, and a drive assembly for driving the crushing rollers to rotate is provided in the equipment chamber.

[0007] The collection chamber is equipped with a screening component, which includes a screening frame and a screen that can be pulled out and installed in the screening frame. The equipment chamber is equipped with a shaking component for driving the screening frame to shake. The driving component works to drive the shaking component to work.

[0008] Furthermore, the crushing roller has mounting shafts at both ends that extend into the corresponding equipment cavities. The mounting shaft in one of the two equipment cavities has meshing gears, and the mounting shaft in the other of the two equipment cavities has a first synchronous pulley. A motor is installed on the outer wall of the housing, and a second synchronous pulley is installed on the output shaft of the motor. A synchronous belt is fitted onto the second synchronous pulley and the corresponding first synchronous pulley.

[0009] Furthermore, the upper side of the screening frame and at the four corners are provided with mounting rods that extend into the corresponding equipment cavities. The mounting rods located in the equipment cavities are threaded with mounting nuts, and the mounting rods located in the equipment cavities are fitted with springs for pushing the screening frame upward.

[0010] The shaking assembly includes a cam mounted on a mounting shaft, a push rod on the upper side of the screening frame extending into the equipment cavity, a spring for driving the push rod to abut against the outer wall of the cam, and the rotation of the cam for driving the screening frame to shake up and down.

[0011] Furthermore, an insertion groove is provided on one side wall of the screening frame for inserting the screen mesh into the screening frame.

[0012] Furthermore, the bottom of the crushing chamber is equipped with a guide cover for guiding the powder onto the screen.

[0013] Furthermore, the collection chamber is equipped with a pull-out collection box located below the screening frame.

[0014] Furthermore, a guide hopper is provided at the top of the shell, which is used to guide polyethylene plastic particles into the crushing rollers.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model uses a drive assembly to drive the crushing roller to rotate, thereby crushing plastic particles. At the same time, the drive assembly drives the shaking assembly to drive the screening frame and screen to shake up and down in the collection chamber, so as to avoid the accumulation of plastic powder on the screen and thus ensure the screening effect of the screening assembly on the plastic powder.

[0017] 2. This utility model, through the setting of the insertion groove, the insertion port and the cover plate, allows the operator to remove the screen in the screening frame by assembling and disassembling the cover plate at the insertion port, so as to disassemble and clean the screen. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a polyethylene plastic pellet crusher according to the present invention.

[0019] Figure 2 This is one of the cross-sectional schematic diagrams of the crusher in this utility model.

[0020] Figure 3 This is the second cross-sectional schematic diagram of the crusher in this utility model.

[0021] Figure 4 This is a schematic diagram of the cooperation structure between the screening component and the crushing roller in this utility model.

[0022] Figure 5 This is a schematic diagram of the structure between the screen and the screening frame in this utility model.

[0023] The meanings of the labels in the diagram are as follows:

[0024] 100. Shell; 101. Feed hopper; 110. Motor; 111. Second synchronous pulley; 120. Collection box; 130. Cover plate;

[0025] 201. Crushing chamber; 202. Equipment chamber; 203. Collection chamber; 210. Crushing roller; 220. Screening frame; 221. Mounting rod; 222. Top rod; 230. Screen; 240. Guide cover;

[0026] 410. Mounting shaft; 420. Gear; 430. First timing pulley; 440. Timing belt; 451. Mounting nut; 452. Spring; 460. Cam;

[0027] 501, Insertion slot; 511, Lifting slot. Detailed Implementation

[0028] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are merely illustrative of this utility model and are not intended to limit it.

[0029] The following is in conjunction with the appendix Figures 1-5 This embodiment will be described in further detail.

[0030] like Figures 1-3 As shown, a polyethylene plastic pellet crusher in this embodiment includes a housing 100, a crushing chamber 201, equipment chambers 202 located on both sides of the crushing chamber 201, and a collection chamber 203 located below the crushing chamber 201 and equipment chambers 202. Rotatable crushing rollers 210 are arranged opposite each other in the crushing chamber 201, and a drive assembly for driving the crushing rollers 210 to rotate is provided in the equipment chambers 202.

[0031] The collection chamber 203 is equipped with a screening component, which includes a screening frame 220 and a screen 230 that can be pulled out and installed in the screening frame 220. The equipment chamber 202 is equipped with a shaking component for driving the screening frame 220 to shake. The driving component works to drive the shaking component to work.

[0032] In actual use, the crushing roller 210 is driven to rotate by the drive component to crush the polyethylene plastic particles to be crushed, and the crushed plastic powder enters the collection chamber 203 for collection.

[0033] The screening component in the collection chamber 203 can screen the crushed plastic powder to ensure that the particle size of the plastic powder collected in the collection chamber 203 meets the requirements.

[0034] Specifically, by setting up the screening frame 220 and the screen 230, the screen 230 can screen the plastic powder entering the collection chamber 203. In order to improve the screening effect of the screening component, in this embodiment, the driving component drives the shaking component to work, so that the screening frame 220 and the screen 230 are shaken up and down in the collection chamber 203, so as to avoid the accumulation of plastic powder on the screen 230 and affect its screening effect.

[0035] Combination Figure 4 As shown, in this embodiment, the crushing roller 210 has mounting shafts 410 extending into the corresponding equipment chambers 202 at both ends. Specifically, the crushing chambers 201 have through holes on opposite sidewalls for the corresponding mounting shafts 410 to pass through, thereby enabling the crushing roller 210 to be rotated and installed in the crushing chambers 201. A gear 420 that meshes with each other is fixed on the mounting shaft 410 located in one of the two equipment chambers 202, and a first synchronous pulley 430 is fixed on the mounting shaft 410 located in the other of the two equipment chambers 202. A motor 110 is fixed on the outer sidewall of the housing 100, and a second synchronous pulley 111 is provided on the output shaft of the motor 110. A synchronous belt 440 is fitted on the second synchronous pulley 111 and the corresponding first synchronous pulley 430.

[0036] Through the above-described structure, the motor 110 can drive the second synchronous pulley 111 to rotate, and then, under the action of the first synchronous pulley 430, the synchronous belt 440 and the gear 420, the two crushing rollers 210 can rotate in the crushing chamber 201 to crush the plastic particles that enter between them.

[0037] The crushing roller 210 is a conventional structure with textured surfaces. The rotation of the two crushing rollers 210 applies extrusion and shearing forces to the plastic particles, causing the material to be crushed and ground into smaller particles or powder. Specifically, in order to prevent the polyethylene plastic particles from softening and sticking due to frictional heat, a cooling system is provided inside the crushing roller 210 in this embodiment. The cooling system is a conventional structure that can form a circulating water cooling or oil cooling system inside the crushing roller 210 to cool and reduce the temperature of the crushing roller 210.

[0038] In this embodiment, the crushing chamber 201 is designed with openings at both the top and bottom. To better guide the plastic particles to be crushed between the two crushing rollers 210, [further details are needed]. Figure 3 As shown, a guide hopper 101 is provided at the top of the housing 100. The guide hopper 101 is adapted to the upper opening of the crushing chamber 201 and is used to guide polyethylene plastic particles into the crushing rollers 210. The equipment chamber 202 is set with an upper opening and its bottom is a sealed structure. Therefore, the equipment chamber 202 is not connected to the crushing chamber 201 and the collection chamber 203 to avoid the plastic powder after crushing from overflowing into the equipment chamber 202.

[0039] In this embodiment, the upper side of the screening frame 220 and at the four corners are provided with mounting rods 221 that extend into the corresponding equipment cavity 202. Specifically, the mounting rods 221 penetrate the bottom wall of the equipment cavity 202 and extend into the equipment cavity 202. The mounting rods 221 located in the equipment cavity 202 are threaded with mounting nuts 451. The mounting rods 221 located in the equipment cavity 202 are fitted with springs 452 for pushing the screening frame 220 upward. The upper end of the spring 452 abuts against the mounting nut 451, and the lower end abuts against the bottom wall of the equipment cavity 202, so that the spring 452 is installed and pushes the screening frame 220 upward.

[0040] The shaking assembly includes a cam 460 fixed on the mounting shaft 410, a push rod 222 extending into the equipment cavity 202 from the upper side of the screening frame 220, and a spring 452 for driving the push rod 222 to abut against the outer wall of the cam 460. The rotation of the cam 460 drives the screening frame 220 to shake up and down.

[0041] In this embodiment, the rotation of the mounting shaft 410 can drive the cam 460 to rotate. When the cam 460 rotates, its protruding part presses against the push rod 222, which in turn drives the corresponding push rod 222 and the screening frame 220 to move downward. When the protruding part moves away from the corresponding push rod 222, the spring 452 drives the push rod 222 and the screening frame 220 to move upward and reset. Therefore, during the continuous rotation of the cam 460, the screening frame 220 can be made to vibrate up and down.

[0042] In order to ensure the screening effect of the screening component, the side wall of the screening frame 220 and the side wall of the collection chamber 203 are slidably attached in this embodiment.

[0043] In order to achieve stable up-and-down shaking of the screening frame 220, the gear ratio of the two gears 420 in this embodiment is 1, so that the rotation speed of the mounting shaft 410 is the same. At the same time, the protruding part of the cam 460 is mounted on the corresponding mounting shaft 410 in the same direction. Thus, the rotation of the mounting shaft 410 can drive the cam 460 to achieve stable up-and-down shaking of the screening frame 220 in the collection chamber 203.

[0044] Combination Figure 5 As shown, in this embodiment, a slot 501 is provided on one side wall of the screening frame 220 for inserting the screen 230 into the screening frame 220.

[0045] In actual use, the side wall of the housing 100 is provided with an insertion port corresponding to the insertion groove 501. An openable cover plate 130 is provided at the insertion port by screws. The screen 230 can be inserted and installed in the insertion groove 501 through the insertion port, so that the screen 230 can be disassembled and cleaned.

[0046] Specifically, when the cover plate 130 is installed at the insertion port, the side wall of the screening frame 220 slides and fits against the side wall of the cover plate 130. At the same time, the cover plate 130 can press the screen 230 into the insertion groove 501 to realize the installation of the screen 230 in the screening frame 220.

[0047] In actual use, to facilitate the removal of the screen 230 from the insertion slot 501, combined with... Figure 5 As shown in this embodiment, the lower side of the screening frame 220 is provided with a notch for connecting the insertion groove 501, and the screen 230 is provided with a lifting groove 511 corresponding to the notch. In this way, the operator can pull out the screen 230 by holding the lifting groove 511 through the notch, which is simple and convenient to operate.

[0048] In this embodiment, in order to better guide the plastic powder discharged from the crushing chamber 201 onto the screen 230, a guide cover 240 for guiding the powder onto the screen 230 is fixedly provided at the bottom opening of the crushing chamber 201.

[0049] In this embodiment, in order to facilitate the collection of plastic powder after sieving by the sieve 230, a collection box 120 that can be pulled out and located below the sieve frame 220 is provided in the collection chamber 203.

[0050] Specifically, a pull-out groove is provided on the outer side wall of the housing 100 at the bottom, and the collection box 120 is pulled out and installed in the collection cavity 203 through the pull-out groove; wherein, in order to facilitate the operator to pull out the collection box 120, a handle is fixedly provided on the side wall of the collection box 120 outside the collection cavity 203.

[0051] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall fall within the scope of the patent of the present utility model.

Claims

1. A polyethylene plastic pellet crusher, comprising a shell (100), wherein the shell (100) is provided with a crushing chamber (201), equipment chambers (202) located on both sides of the crushing chamber (201), and a collection chamber (203) located below the crushing chamber (201) and the equipment chambers (202), characterized in that: Rotatable crushing rollers (210) are arranged opposite each other in the crushing chamber (201), and a drive assembly for driving the crushing rollers (210) to rotate is provided in the equipment chamber (202); The collection chamber (203) is equipped with a screening component, which includes a screening frame (220) and a screen (230) that can be pulled out and installed in the screening frame (220). The equipment chamber (202) is equipped with a shaking component for driving the screening frame (220) to shake. The driving component works to drive the shaking component to work.

2. A polyethylene plastic pellet crusher as claimed in claim 1, wherein: The crushing roller (210) has mounting shafts (410) extending into the corresponding equipment chambers (202) at both ends. The mounting shaft (410) located in one of the two equipment chambers (202) has meshing gears (420). The mounting shaft (410) located in the other of the two equipment chambers (202) has a first synchronous pulley (430). The outer wall of the housing (100) has a motor (110). The output shaft of the motor (110) has a second synchronous pulley (111). The second synchronous pulley (111) and the corresponding first synchronous pulley (430) are fitted with synchronous belts (440).

3. A polyethylene plastic pellet crusher as claimed in claim 2, wherein: The upper side of the screening frame (220) and at the four corners are provided with mounting rods (221) that extend into the corresponding equipment cavity (202). The mounting rods (221) located in the equipment cavity (202) are threaded with mounting nuts (451). The mounting rods (221) located in the equipment cavity (202) are fitted with springs (452) for pushing the screening frame (220) to move upward. The shaking assembly includes a cam (460) mounted on the mounting shaft (410), a push rod (222) on the upper side of the screening frame (220) and extending into the equipment cavity (202), and a spring (452) for driving the push rod (222) to abut against the outer wall of the cam (460). The rotation of the cam (460) drives the screening frame (220) to shake up and down.

4. A polyethylene plastic pellet crusher as defined in claim 1, wherein: A slot (501) is provided on one side wall of the screening frame (220) for inserting the screen (230) into the screening frame (220).

5. A polyethylene plastic pellet crusher as defined in claim 1, wherein: The bottom of the crushing chamber (201) is provided with a guide cover (240) for guiding powder onto the screen (230).

6. A polyethylene plastic pellet crusher as defined in claim 1, wherein: The collection chamber (203) is provided with a pull-out collection box (120) located below the screening frame (220).

7. A polyethylene plastic pellet crusher as defined in claim 1, wherein: A guide hopper (101) is provided at the top of the housing (100) for guiding polyethylene plastic particles between the crushing rollers (210).

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