Plastic foam shredding device

Abstract

This solution discloses a plastic foam crushing device in the field of plastic foam processing technology, including a crushing chamber and a discharge chamber connected below the crushing chamber. The top of the crushing chamber has a feeding port, and it also includes a piercing mechanism connected to the outer wall of the crushing chamber. The piercing mechanism includes an electrically controlled telescopic component and a piercing assembly. The piercing assembly includes a connecting plate and several conical spikes evenly distributed on one side of the connecting plate. The other side of the connecting plate is connected to the telescopic end of the electrically controlled telescopic component. The wall of the crushing chamber has a clearance opening and a through hole. The through hole is located above the clearance opening, and a turntable is rotatably connected to the through hole. The turntable has several sliding holes for the conical spikes to pass through. The electrically controlled telescopic component is also connected to a first motor that drives its rotation. A partition is provided inside the crushing chamber, and the partition is rotatably or slidably connected to the clearance opening. The friction and torque during the piercing and conical spike agitation of the plastic foam promote its crushing, resulting in a fast crushing speed and the ability to break it into smaller foam pieces.

Description

Technical Field

[0001] This invention belongs to the field of plastic foam processing technology, and specifically relates to a plastic foam crushing device. Background Technology

[0002] Polystyrene foam is one of the most widely used plastics in the world today. Due to its excellent water resistance, heat insulation, electrical insulation, low moisture absorption, and strong shock resistance, as well as its lightweight, strength, and ease of molding, it is widely used in packaging, moisture retention, waterproofing, heat insulation, shock absorption, decoration, catering, and other fields, permeating all sectors of the national economy. Polystyrene foam is often used only once, and millions of tons of this white pollution, once left in nature, neither decomposes nor degrades on its own, causing serious environmental pollution. How to effectively recycle and utilize waste polystyrene foam has attracted widespread attention from researchers worldwide.

[0003] Polystyrene granules can be processed into polystyrene foam boards, which are widely used in refrigerators and freezers for insulation. However, if the processed polystyrene foam boards do not meet the specifications required by refrigerators and freezers, they need to be crushed into polystyrene granules. These granules are then processed into polystyrene foam boards that meet the required specifications.

[0004] Traditionally, the crushing of plastic foam is done manually. However, with increasing demands for production efficiency, equipment-based crushing methods have emerged, such as the plastic foam processing device disclosed in CN108890924A. This device aims to replace manual labor and improve the crushing efficiency of plastic foam. It includes a frame, a main shaft rotating on the frame, a motor driving the main shaft, and a crushing chamber fixed to the frame. The main shaft is hollow and closed at the bottom, and from top to bottom, it has an air-blowing mechanism, a crushing mechanism, a shearing mechanism, and a mixing mechanism. However, plastic foam generally has varying thicknesses, so piercing with spikes is difficult without piercing and agitation. Cutting with a blade is also difficult because the foam exerts a reaction force in the cutting direction, making it hard to cut. A serrated edge would be easier, but this device lacks a serrated edge, so overall, its crushing effect on plastic foam is not very good. Summary of the Invention

[0005] This invention addresses the shortcomings of existing technologies by providing a highly efficient plastic foam crushing device with better crushing effect.

[0006] The plastic foam crushing device in this solution includes a crushing chamber and a discharge chamber connected below the crushing chamber. The top of the crushing chamber is provided with a feeding port, and it also includes a piercing mechanism connected to the outer wall of the crushing chamber. The piercing mechanism includes an electrically controlled telescopic component and a piercing assembly. The piercing assembly includes a connecting plate and several conical spikes evenly distributed on one side of the connecting plate. The other side of the connecting plate is connected to the telescopic end of the electrically controlled telescopic component. The wall of the crushing chamber is provided with a clearance opening and a through hole. The through hole is located above the clearance opening, and a turntable is rotatably connected to the through hole. The turntable is provided with several sliding holes for the conical spikes to pass through. The electrically controlled telescopic component is also connected to a first motor that drives its rotation. A partition is provided inside the crushing chamber, and the partition is rotatably or slidably connected to the clearance opening.

[0007] The working principle of this scheme is as follows: Before the device is used, the cone-shaped bar is located outside the crushing chamber. The plastic foam to be crushed is added into the crushing chamber through the feeding port. The plastic foam is intercepted on the partition plate. Then, the cone-shaped bar is made to pass through the sliding hole on the turntable by the electronically controlled telescopic component. The cone-shaped bar pierces the plastic foam. Then, the first motor is started. The first motor drives the electronically controlled telescopic component to rotate. In this way, several of the cone-shaped bars rotate around the central axis of the turntable. During the rotation, due to the irregular shape of the plastic foam to be crushed, friction will be generated between them, so that the plastic foam is subjected to a certain torque and is torn and broken. Then the cone-shaped bar slides out and pierces into the plastic foam again. The above process is repeated many times to further crush the plastic foam.

[0008] After crushing is complete, the partition is removed, and the crushed plastic foam falls into the discharge hopper and is discharged.

[0009] The beneficial technical effects of this solution are: the friction and torque during the agitation process of the plastic foam by puncturing and cone-shaped rods promote the breaking of the plastic foam, and the breaking speed is fast, which can break it into smaller foam pieces.

[0010] Furthermore, there are two piercing mechanisms and two through holes, which are arranged opposite to each other. Each through hole is rotatably connected to a turntable. Sliding holes on both turntables are arranged in a circle around the center of the turntable, and the distances from the sliding holes to the center of the turntable are different. Each turntable corresponds to one piercing mechanism, and the output shafts of the first motors in the two piercing mechanisms rotate in opposite directions. Using the same principle, the piercing material passes through the foam from both sides, but the rotation directions of the conical piercing rods on both sides are opposite, resulting in greater torque on the foam and more efficient piercing.

[0011] Furthermore, the partition divides the crushing chamber into an upper primary crushing chamber and a lower secondary crushing chamber. A pair of rollers are rotatably connected within the secondary crushing chamber, and a second motor is installed on the outer wall of the secondary crushing chamber to drive the rollers to rotate in opposite directions. The small pieces of plastic foam crushed in the primary crushing chamber are further crushed by compression as they pass through the rollers.

[0012] Furthermore, the surface of the rollers is evenly distributed with several staggered protrusions. The protrusions concentrate the force on the plastic foam, making the plastic foam block easier to break.

[0013] Furthermore, the surface of the cone-shaped spike is evenly covered with prisms.

[0014] Furthermore, the surfaces of the cone-shaped spike and the prism are both coated with an antistatic coating. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the plastic foam crushing device of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the plastic foam crushing device of the present invention. Detailed Implementation

[0017] The following detailed description illustrates the specific implementation method:

[0018] The reference numerals in the accompanying drawings of the instruction manual include: 1. Discharge bin; 2. Second motor; 3. Double roller; 4. Partition plate; 5. Conical spike rod; 6. Crushing bin; 7. Turntable; 8. Connecting plate; 9. Cylinder; 10. First motor; 11. Support platform; 12. Idler roller.

[0019] Example 1 is basically as shown in the appendix. Figure 1 As shown: A plastic foam crushing device includes a crushing chamber 6 and a discharge chamber 1 connected below the crushing chamber 6. The top of the crushing chamber 6 is provided with a feeding port, and the wall of the crushing chamber 6 is provided with a clearance opening. A partition 4 is provided inside the crushing chamber 6. The partition 4 is slidably connected to the clearance opening. The inner wall of the crushing chamber 6 is provided with a sliding groove for the edge of the partition 4 to be engaged. Part of the partition 4 extends out of the clearance opening so that the partition 4 can be easily removed. The partition 4 divides the crushing chamber 6 into a primary crushing chamber 6 located above and a secondary crushing chamber 6 located below.

[0020] The outer wall of the primary crushing chamber 6 is connected to a support platform 11. The support platform 11 is equipped with a piercing mechanism, which includes a cylinder 9 and a piercing assembly. The piercing assembly includes a connecting plate 8 and several conical spikes 5 evenly distributed on one side of the connecting plate 8. The other side of the connecting plate 8 is connected to the telescopic end of the cylinder 9. The cylinder 9 is connected to a first motor 10 that drives it to rotate. A roller 12 is provided between the cylinder 9 and the support platform 11 to support the cylinder 9 and facilitate the rotation of the cylinder 9 under the drive of the first motor 10. The wall of the primary crushing chamber 6 is provided with a through hole, which is located above the clearance opening. The wall of the through hole is provided with an annular slide. A turntable 7 is rotatably connected to the through hole. The edge of the turntable 7 extends out a wing that slides into the slide. The turntable 7 is provided with several sliding holes for the conical spikes 5 to pass through. A pair of rollers 3 are rotatably connected inside the secondary crushing chamber 6. Several staggered protrusions are evenly distributed on the surface of the pair of rollers 3. The roller 3 is connected to two meshing gears located on the outer wall of the secondary crushing chamber 6, one of which is connected to the second motor 2.

[0021] As an optimization, prisms can be evenly distributed on the surface of the spike rod, and both the surface of the spike rod and the prisms can be coated with an antistatic coating.

[0022] Example 2 differs from Example 1 as follows: Figure 2 As shown: The primary crushing chamber 6 is also provided with a through hole. The two through holes are arranged opposite each other and their centers are on the same straight line. In this scheme, a turntable 7 and a piercing mechanism with the same working principle as in the embodiment, as well as a first motor 10 that indirectly drives the cone-shaped spike rod 5 to rotate, are also rotatably connected through the through hole. The difference is that the cone-shaped spike rods 5 on the two connecting plates 8 will not overlap in trajectory during rotation. In this scheme, the sliding holes on the two turntables 7 are arranged in a circle around the center of the turntable 7, and there is only one circle. The distance from the sliding holes on the two turntables 7 to the center of the turntable 7 is different.

[0023] Taking Example 2 as an example, the specific implementation process is as follows: Before using the device, the cone-shaped bar 5 is located outside the crushing chamber 6. The plastic foam to be crushed is added into the primary crushing chamber 6 through the feeding port. The plastic foam is intercepted on the partition plate 4. Then, the cone-shaped bar 5 on both sides is made to pass through the sliding hole on the turntable 7 through the electrically controlled telescopic component. The cone-shaped bar 5 pierces the plastic foam. Then, the two first motors 10 are started. The first motors 10 drive the electrically controlled telescopic component to rotate. In this way, the cone-shaped bar 5 rotates around the central axis of the turntable 7. During the rotation, due to the irregular shape of the plastic foam to be crushed, friction will be generated between them, so that the plastic foam is subjected to a certain torque and is torn and broken. Then, the cone-shaped bar 5 is slid out and then inserted into the plastic foam. The above process is repeated many times to further crush the plastic foam.

[0024] After crushing, the plastic foam slides out of the partition 4 and falls into the secondary crushing chamber 6. Under the rotation of the rollers 3, the small pieces of plastic foam are squeezed and further crushed as they pass through the rollers 3. Finally, they are discharged through the discharge chamber 1.

Claims

1. A plastic foam crushing device, comprising a crushing chamber and a discharge chamber connected below the crushing chamber, wherein the top of the crushing chamber is provided with a feeding port, characterized in that: It also includes a piercing mechanism connected to the outer wall of the crushing chamber. The piercing mechanism includes an electrically controlled telescopic component and a piercing assembly. The piercing assembly includes a connecting plate and several conical spikes evenly distributed on one side of the connecting plate. The other side of the connecting plate is connected to the telescopic end of the electrically controlled telescopic component. The wall of the crushing chamber is provided with a clearance opening and a through hole. The through hole is located above the clearance opening. A turntable is rotatably connected to the through hole. The turntable is provided with several sliding holes for the conical spikes to pass through. The electrically controlled telescopic component is also connected to a first motor that drives its rotation. A partition is provided inside the crushing chamber. The partition is rotatably or slidably connected to the clearance opening.

2. The plastic foam crushing device according to claim 1, characterized in that: There are two piercing mechanisms and two through holes. The two through holes are arranged opposite to each other. Each through hole is rotatably connected to a turntable. The sliding holes on the two turntables are arranged in a circle around the center of the turntable, and the distances from the sliding holes on the two turntables to the center of the turntable are different. Each turntable is provided with one piercing mechanism. The output shafts of the first motors in the two piercing mechanisms rotate in opposite directions.

3. The plastic foam crushing device according to claim 2, characterized in that: The partition divides the crushing chamber into a primary crushing chamber located above and a secondary crushing chamber located below. A pair of rollers are rotatably connected inside the secondary crushing chamber, and a second motor is provided on the outer wall of the secondary crushing chamber to drive the pair of rollers to rotate in opposite directions.

4. The plastic foam crushing device according to claim 3, characterized in that: The surface of the rollers is evenly distributed with several staggered protrusions.

5. The plastic foam crushing device according to any one of claims 1 to 3, characterized in that: The surface of the cone-shaped spike is evenly covered with prisms.

6. The plastic foam crushing device according to claim 5, characterized in that: The surfaces of the spike rod and the prism are all coated with an antistatic coating.

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