A pulverizing processing device for polypropylene composite material

Abstract

The utility model discloses a kind of for polypropylene composite material's comminution processing device, including shell and crushing roller group, the upper end of the shell is equipped with flap door assembly, the inside upper of shell is installed in crushing roller group, and the below of crushing roller group is provided with crushing knife, the below of crushing knife is equipped with screen one, and the below of screen one is equipped with motor one.This one for polypropylene composite material's comminution processing device, compared with existing comminution processing device, start cold air fan to reduce shell internal temperature quickly, by flap polypropylene composite material is poured into shell, material falls between crushing roller group and is preliminarily broken to prevent splashing, subsequently, the crushing knife driven by motor one is broken again to improve effect, material is filtered twice after crushing by screen one and screen two, meet the size and fall into collection frame storage, do not meet the size and be pushed into backflow pipe by sweep rod driven by motor one, spiral julong driven by motor two is sent back to the above of crushing roller group and is repeatedly broken.

Description

Technical Field

[0001] This utility model relates to the field of polypropylene composite material technology, specifically to a crushing and processing device for polypropylene composite materials. Background Technology

[0002] Polypropylene composite materials are multifunctional material systems formed by adding reinforcing materials, modifiers, or blending with other polymers to polypropylene resin as the matrix. They have the characteristics of being lightweight, high-strength, and resistant to chemical corrosion, and are widely used in automobiles, cables, packaging and other fields.

[0003] The existing crushing process for polypropylene composites is a key technology that changes the material's morphology and properties through physical processing. However, the crushing effect of polypropylene composites under existing crushing devices is poor. It is necessary to take advantage of the increased brittleness of polypropylene at low temperatures and adopt a multi-stage crushing system (primary crushing with rollers + secondary shearing with blades) to achieve efficient crushing. Furthermore, a closed-loop design is needed to recycle unqualified particles. Therefore, a crushing and processing device for polypropylene composites is required. Utility Model Content

[0004] The purpose of this invention is to provide a crushing and processing device for polypropylene composite materials to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a crushing and processing device for polypropylene composite materials, comprising a shell and a crushing roller assembly. A hinged door assembly is installed at the upper end of the shell. The crushing roller assembly is installed inside the upper part of the shell, and a crushing blade is provided below the crushing roller assembly. A screen is installed below the crushing blade, and a motor is installed below the screen. The polypropylene composite material falls between the crushing roller assembly for initial crushing, and then falls again and is driven by the motor to be crushed again by the crushing blade.

[0006] Furthermore, the trapdoor assembly includes a trapdoor and a counterweight, with the counterweight installed below the trapdoor. Polypropylene composite material is poured into the housing through the trapdoor, and the trapdoor quickly resets and closes via the counterweight to prevent debris from splashing out of the housing.

[0007] Furthermore, a cooling fan is installed inside the rear side wall of the outer casing, and the cooling fan is embedded in the outer casing. The cooling fan quickly reduces the temperature inside the outer casing, and reduces the brittleness of the material by utilizing the poor low-temperature resistance of polypropylene.

[0008] Furthermore, a sweeping rod is installed below the motor, and a screen is installed below the sweeping rod. The non-compliant polypropylene composite material is pushed into the return pipe by the sweeping rod driven by the motor.

[0009] Furthermore, a collection frame is provided below the second screen, and a vibrating rod is installed inside the collection frame. Polypropylene composite materials that meet the specifications fall into the collection frame for storage, and the vibrating rod emits high-frequency vibrations to shake and smooth the accumulated polypropylene composite materials, preventing local accumulation.

[0010] Furthermore, a return pipe is installed on the left side of the outer casing, and the return pipe is welded to the outer casing.

[0011] Furthermore, a spiral auger is rotatably connected inside the return pipe, and a second motor is installed at the lower end of the spiral auger. The second motor drives the spiral auger to send the material back to the top of the crushing roller group for repeated crushing.

[0012] Compared with existing technologies, the beneficial effects of this utility model are as follows: The air conditioner fan quickly lowers the internal temperature of the casing; the poor low-temperature resistance of polypropylene reduces material brittleness; the polypropylene composite material is poured into the casing through a valve, which is quickly reset and closed by a counterweight. The material is initially crushed between the crushing rollers to prevent splashing, and then further crushed by the crushing blades driven by motor one to improve efficiency. After crushing, the material is filtered twice by screen one and screen two. Material that meets specifications falls into a collection frame for storage, and high-frequency vibration by a vibrating rod prevents accumulation; material that does not meet specifications is pushed into the return pipe by a sweeping rod driven by motor one, and then sent back to the top of the crushing rollers by a spiral auger driven by motor two for repeated crushing, thus improving the yield. 1. This utility model starts the air conditioner to quickly reduce the temperature inside the shell. It utilizes the poor low-temperature resistance of polypropylene to reduce the brittleness of the material. The polypropylene composite material is poured into the shell through the valve. The valve is quickly reset and closed by the counterweight. The polypropylene composite material falls between the crushing roller group for initial crushing to prevent fragments from splashing out of the shell. The polypropylene composite material then falls again and is crushed again by the crushing blade driven by the motor, resulting in a better crushing effect. 2. The crushed polypropylene composite material of this utility model is initially filtered through screen one and then falls onto screen two for secondary filtration, resulting in better screening effect. Polypropylene composite material that meets the specifications falls into the collection box for storage. The vibrating rod emits high-frequency vibration to shake and smooth the accumulated polypropylene composite material, preventing local accumulation. Polypropylene composite material that does not meet the specifications is pushed into the return pipe by the sweeping rod driven by motor one. Motor two drives the spiral auger to send the material back to the crushing roller group for repeated crushing, thereby improving the yield. Attached Figure Description

[0013] Figure 1 This is a front cross-sectional view of a crushing and processing device for polypropylene composite materials according to the present invention. Figure 2 This is a three-dimensional structural diagram of a crushing roller assembly for a crushing and processing device for polypropylene composite materials according to the present invention. Figure 3This is a top view of the collection frame structure of a crushing and processing device for polypropylene composite materials according to the present invention.

[0014] In the diagram: 1. Outer shell; 2. Trapdoor assembly; 201. Trapdoor; 202. Counterweight; 3. Air conditioner; 4. Crushing roller assembly; 5. Crushing blade; 6. Screen 1; 7. Motor 1; 8. Sweeping bar; 9. Screen 2; 10. Return pipe; 11. Spiral auger; 12. Motor 2; 13. Collection frame; 14. Vibrating rod. Detailed Implementation

[0015] like Figure 1 and Figure 2 As shown, a crushing and processing device for polypropylene composite materials includes a housing 1 and a crushing roller assembly 4. A flap door assembly 2 is installed at the upper end of the housing 1. The crushing roller assembly 4 is installed inside the upper part of the housing 1, and a crushing blade 5 is arranged below the crushing roller assembly 4. A screen 6 is installed below the crushing blade 5, and a motor 7 is installed below the screen 6. The flap door assembly 2 includes a door 201 and a counterweight 202, and the counterweight 202 is installed below the door 201. A cooling fan 3 is installed inside the rear side wall of the housing 1, and the cooling fan 3 is embedded in the housing 1. When the cooling fan 3 is activated, the temperature inside the housing 1 is quickly reduced. Taking advantage of the poor low-temperature resistance of polypropylene, the brittleness of the material is reduced. The polypropylene composite material is poured into the housing 1 through the door 201. The door 201 is quickly reset and closed by the counterweight 202. The polypropylene composite material falls between the crushing roller assembly 4 for initial crushing, preventing fragments from splashing out of the housing 1. The polypropylene composite material then falls again and is driven by the motor 7 to crush the crushing blade 5 again, resulting in a better crushing effect.

[0016] like Figure 1 and Figure 3 As shown, a sweeping rod 8 is installed below motor 7, and a screen 9 is installed below sweeping rod 8. A collection frame 13 is set below screen 9, and a vibrating rod 14 is installed inside the collection frame 13. A return pipe 10 is installed on the left side of the outer shell 1, and the return pipe 10 is welded to the outer shell 1. A spiral auger 11 is rotatably connected inside the return pipe 10, and a motor 12 is installed at the lower end of the spiral auger 11. The crushed polypropylene composite material is initially filtered through screen 6, and then falls onto screen 9 for secondary filtration, resulting in better screening effect. Polypropylene composite material that meets the specifications falls into the collection frame 13 for storage. The vibrating rod 14 emits high-frequency vibration to vibrate and smooth the accumulated polypropylene composite material, preventing local accumulation. Polypropylene composite material that does not meet the specifications is pushed into the return pipe 10 by sweeping rod 8 driven by motor 7. Motor 12 drives spiral auger 11 to send the material back to the crushing roller group 4 for repeated crushing, improving the yield.

[0017] Working principle: When using this crushing and processing device for polypropylene composite materials, firstly, the cooling fan 3 is started to rapidly reduce the internal temperature of the outer shell 1 to the range of -15℃ to -20℃ through forced convection. Utilizing the characteristic that the molecular chain segment mobility of polypropylene composite materials decreases in a low-temperature environment, its embrittlement coefficient is increased by more than 40%. After the valve 201 closes rapidly in 0.5 seconds under the action of the counterweight 202, the embrittled material enters the crushing roller group 4 with adjustable roller spacing in a free-fall manner. Primary crushing is completed under the action of the toothed roller surface. After secondary crushing by the three-stage crushing blade 5 driven by motor 7, the material passes through screen 6 and screen 9 in sequence to achieve particle size classification. Qualified particles are collected in the collection frame 13 by the action of the vibrating rod 14 to form a uniform material layer. Unqualified coarse particles are pushed to the return pipe 10 by the sweeping rod 8 and finally returned to the top of the crushing roller group 4 by the spiral auger 11 driven by motor 12. Through three cycles of crushing, the finished product rate is stably controlled at more than 95%.

Claims

1. A crushing and processing apparatus for polypropylene composite materials, comprising a housing (1) and a crushing roller assembly (4), characterized in that, The upper end of the outer shell (1) is equipped with a flap door assembly (2), the crushing roller assembly (4) is installed inside the upper part of the outer shell (1), and a crushing blade (5) is provided below the crushing roller assembly (4). A screen (6) is installed below the crushing blade (5), and a motor (7) is installed below the screen (6).

2. The crushing and processing apparatus for polypropylene composite materials according to claim 1, characterized in that, The trapdoor assembly (2) includes a trapdoor (201) and a counterweight (202), and the counterweight (202) is installed below the trapdoor (201).

3. The pulverizing and processing apparatus for polypropylene composite materials according to claim 1, characterized in that, An air cooler (3) is installed inside the rear side wall of the outer casing (1), and the air cooler (3) is embedded in the outer casing (1).

4. The pulverizing and processing apparatus for polypropylene composite materials according to claim 1, characterized in that, A sweeping rod (8) is installed below the motor (7), and a screen (9) is installed below the sweeping rod (8).

5. The pulverizing and processing apparatus for polypropylene composite materials according to claim 4, characterized in that, A collection frame (13) is provided below the second screen (9), and a vibrating rod (14) is installed inside the collection frame (13).

6. The pulverizing and processing apparatus for polypropylene composite materials according to claim 1, characterized in that, A return pipe (10) is installed on the left side of the outer shell (1), and the return pipe (10) is welded to the outer shell (1).

7. The crushing and processing apparatus for polypropylene composite materials according to claim 6, characterized in that, The reflux pipe (10) is internally connected to a spiral auger (11), and a motor (12) is installed at the lower end of the spiral auger (11).

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