EVA granulator with uniform granulation

Abstract

The invention relates to an EVA granulator with uniform granulation, and relates to the technical field of plastic cutting. The invention comprises a conveying system, a bending sensing system and a selective cutting system. The conveying system comprises a plastic strip input end and a plastic strip output end. The bending sensing system is installed at the plastic strip output end of the conveying system. The bending sensing system comprises a bending guide plate, a plurality of sensing devices and a plurality of sensing rails. A plurality of guide channels with a high middle portion and low sides are arranged in the bending guide plate. A sensing opening is arranged at the top of each guide channel. Each sensing rail is respectively installed on the sensing opening. The sensing device is slidably installed on the sensing rail in a liftable manner. The selective cutting system comprises a cutting device and a plurality of material return control devices. Each material return control device is slidably installed on the cutting device. Each material return control device and the cutting device respectively form a cutting groove. Each sensing device controls the corresponding material return control device to slide along the cutting device, and the granulated particles have uniform size.

Description

Technical Field

[0001] The invention relates to the technical field of plastic cutting, in particular to an EVA granulator with uniform granulation. Background Art

[0002] Plastic pelletizing machine is a kind of equipment that reprocesses plastic waste into granular plastic, mainly used for plastic recycling and reuse. Its main components include extrusion system, transmission system and heating and cooling system.

[0003] The main machine of the plastic granulator is an extruder, and its core components include screw, barrel, hopper, die head and mold. The plastic is plasticized into a uniform melt through the extrusion system, and is continuously extruded from the die head under the push of the screw. The die head has several discharge holes, so that multiple plastic strips can be extruded at one time. After being cold-cut into plastic strips by air cooling and water cooling, they are then diced by a pelletizer.

[0004] The existing plastic granulator needs to cut many plastic strips at a time. The forward speed of the plastic strips during extrusion and transportation is not exactly the same. There is also a problem that the plastic strips miss the cutting edge due to the jumping of the plastic strips, resulting in the problem that the particles are too long when cut next time, resulting in unstable cutting and different particle sizes. Summary of the invention

[0005] In order to overcome the technical defects of the prior art, the present invention provides an EVA granulator with uniform granulation, and the granulated particles have uniform size.

[0006] The technical solution adopted by the present invention is:

[0007] The invention discloses an EVA granulator with uniform granulation, comprising a conveying system, a bending sensing system and a selective cutting system, wherein the conveying system has a plastic strip input end and a plastic strip output end, the bending sensing system is installed at the plastic strip output end of the conveying system, the bending sensing system comprises a bending guide plate, a plurality of sensing devices and a plurality of sensing rails, a plurality of guide channels which are high in the middle and low on both sides are arranged in the bending guide plate, a sensing opening is arranged at the top of each guide channel, each sensing rail is respectively installed on the sensing opening, the sensing device is slidably installed on the sensing rail, the selective cutting system comprises a cutting device and a plurality of material return control devices, each material return control device is slidably installed on the cutting device, each material return control device forms a cutting groove with the cutting device, each sensing device is electrically connected with the corresponding material return control device, and each sensing device controls the corresponding material return control device to slide along the cutting device.

[0008] Preferably, the conveying system includes a conveying mounting frame, an upper conveying device and a lower conveying roller, the upper conveying device and the lower conveying roller are both mounted on the conveying mounting frame, the plastic strip input end and the plastic strip output end both point to the middle of the upper conveying device and the lower conveying roller, and the lower conveying roller is transmission-connected to a conveying motor.

[0009] Preferably, the upper conveying device includes two upper conveying sliders and upper conveying rollers, the two upper conveying sliders both slide along the conveying mounting frame, the two ends of the upper conveying rollers are rotatably mounted on the upper conveying sliders, the conveying mounting frame is equipped with two pressurizing studs, the two pressurizing studs press the corresponding upper conveying sliders, and the upper conveying rollers and the lower conveying rollers roll with each other.

[0010] Preferably, a pre-compression spring is provided between the pressure stud and the corresponding upper conveying slide block.

[0011] Preferably, the sensing device includes a sensing ring and a sensing switch. The sensing ring rises and falls and slides along the sensing rail. The sensing switch is installed on the top of the sensing rail. The sensing switch is located on the movement trajectory of the sensing ring. When the sensing ring moves downward, the switch is pressed. When the switch is energized, the corresponding material return control device is controlled to extend until it is flush with the cutting device.

[0012] Preferably, the adjacent sensing rails clamp the corresponding sensing rings to provide guidance for the lifting and lowering of the sensing rings.

[0013] Preferably, the cutting device includes a cutting roller, a negative pressure air source for a cutting motor and an air valve. Each of the material return control devices can be slidably installed on the cutting roller. Each of the material return control devices is arranged in a straight line. The cutting roller is a hollow structure. The cutting roller is connected to the cutting negative pressure air source. An air valve is provided between the cutting negative pressure air source and the cutting roller. When each of the material return control devices is close to the guide channel, the negative pressure air source is connected to the cutting roller. When each of the material return control devices is away from the guide channel, the air valve controls the negative pressure air source to disconnect from the cutting roller.

[0014] Preferably, the material return control device includes a push spring, a push plate and an adsorption electromagnet, the adsorption electromagnet and the push plate attract each other, the push plate can be slidably installed on the cutting device, the push spring is installed on the cutting device, and the push spring pushes the push plate to the surface of the cutting device when it is in a free state.

[0015] The beneficial effects of the present invention are:

[0016] The conveying system has a plastic strip input end and a plastic strip output end. The bending sensing system is installed at the plastic strip output end of the conveying system. The bending sensing system includes a bending guide plate, a plurality of sensing devices and a plurality of sensing rails. The bending guide plate is provided with a plurality of guide channels that are high in the middle and low on both sides. The top of each guide channel is provided with a sensing opening. Each sensing rail is installed on the sensing opening respectively. The sensing device is slidably installed on the sensing rail in a liftable manner. The plastic strip passes through the sensing device. When the plastic strip is redundant, the cutting system is selected to cut continuously. The selective cutting system includes a cutting device and a plurality of material return control devices. Each material return control device can slide is installed on the cutting device, each material return control device and the cutting device form a cutting groove respectively, after the plastic strip extends into the cutting groove, the material is cut when the cutting device rotates, each sensing device is electrically connected to the corresponding material return control device, each sensing device controls the corresponding material return control device to slide along the cutting device, and when the supply of plastic strips is insufficient, the bending degree of the plastic strips in the guide channel is reduced, so that the sensing device descends, and the sensing device further controls the corresponding material return control device to slide along the cutting device to the top of the cutting device, thereby stopping the cutting of the corresponding plastic strip, ensuring the cutting progress of each plastic strip individually, and ensuring uniform cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention.

[0018] Figure 2 for Figure 1 Enlarged schematic diagram at point A in the middle.

[0019] Figure 3 Schematic diagram of the cutting system structure.

[0020] Figure 4 for Figure 3 Enlarged schematic diagram of point B in the middle.

[0021] Figure 5 Schematic diagram of the bending sensing system structure.

[0022] Figure 6 Schematic diagram of the installation relationship between the bending sensing system and the selective cutting system.

[0023] Description of reference numerals:

[0024] 1. Conveying system; 11. Conveying mounting frame; 12. Upper conveying device; 121. Upper conveying slide block; 122. Upper conveying roller; 13. Lower conveying roller;

[0025] 2. Bending sensing system; 21. Bending guide plate; 211. Guide channel; 212. Sensing opening; 22. Sensing device; 221. Sensing ring; 222. Sensing switch; 23. Sensing rail;

[0026] 3. Select cutting system; 31. Cutting device; 32. Material return control device; 321. Material push spring; 322. Material push plate; 323. Adsorption electromagnet; 33. Cutting groove;

[0027] 4. Plastic strips. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings:

[0029] like Figure 1 — Figure 6 As shown, this embodiment provides an EVA granulator with uniform granulation, including a conveying system 1, a bending sensing system 2 and a selective cutting system 3. The conveying system 1 has a plastic strip input end and a plastic strip output end. The bending sensing system 2 is installed at the plastic strip output end of the conveying system 1. The bending sensing system 2 includes a bending guide plate 21, a plurality of sensing devices 22 and a plurality of sensing rails 23. The bending guide plate 21 is provided with a plurality of guide channels 211 with a high middle portion and low sides. The top of each guide channel 211 is provided with a sensing opening 212. Each sensing rail 23 is respectively installed on the sensing opening 212. The sensing device 22 is slidably installed on the sensing rail 23 in a liftable manner. The plastic strip 4 passes through the sensing device 22. When the plastic strip 4 is redundant, the selective cutting system 3 continues cutting. The selective cutting system 3 includes a cutting device 31 and a plurality of material return control devices 32. Each material return The control device 32 is slidably installed on the cutting device 31, and each material return control device 32 and the cutting device 31 respectively form a cutting groove 33. After the plastic strip 4 is extended into the cutting groove 33, the material is cut when the cutting device 31 rotates. Each sensing device 22 is electrically connected to the corresponding material return control device 32, and each sensing device 22 controls the corresponding material return control device 32 to slide along the cutting device 31. The method of the sensing device 22 controlling the material return control device 32 to slide along the cutting device 31 is detailed below. When the supply of plastic strips 4 is insufficient, the bending degree of the plastic strips 4 in the guide channel 211 is reduced, so that the sensing device 22 descends, and the sensing device 22 further controls the corresponding material return control device 32 to slide along the cutting device 31 to the top of the cutting device 31, thereby stopping the cutting of the corresponding plastic strip 4, ensuring the cutting progress of each plastic strip 4 individually, and ensuring uniform cutting.

[0030] Specifically, the conveying system 1 includes a conveying mounting frame 11, an upper conveying device 12 and a lower conveying roller 13. The upper conveying device 12 and the lower conveying roller 13 are both installed on the conveying mounting frame 11. The plastic strip input end and the plastic strip output end both point to the middle of the upper conveying device 12 and the lower conveying roller 13. The lower conveying roller 13 is transmission-connected to a conveying motor. The conveying motor drives the lower conveying roller 13. Each plastic strip 4 is conveyed between the upper conveying device 12 and the lower conveying roller 13.

[0031] Specifically, the upper conveying device 12 includes two upper conveying sliders 121 and upper conveying rollers 122. The two upper conveying sliders 121 slide along the conveying mounting frame 11. The two ends of the upper conveying rollers 122 are rotatably mounted on the upper conveying sliders 121. Two pressurizing studs are installed on the conveying mounting frame 11. The two pressurizing studs press the corresponding upper conveying sliders 121 to ensure the preload force between the upper conveying rollers 122 and the lower conveying rollers 13. The upper conveying rollers 122 and the lower conveying rollers 13 roll with each other to convey the plastic strips 4.

[0032] Specifically, a pre-compression spring is provided between the pressure stud and the corresponding upper conveying slide block 121 to prevent rigid impact on the plastic strip 4 and ensure smooth conveying.

[0033] Specifically, the sensing device 22 includes a sensing ring 221 and a sensing switch 222. The sensing ring 221 rises and falls and slides along the sensing rail 23. The sensing switch 222 is installed on the top of the sensing rail 23. The sensing switch 222 is located on the movement trajectory of the sensing ring 221. When the sensing ring 221 moves downward, the switch is pressed. When the switch is powered on, the corresponding material return control device 32 is controlled to extend until it is flush with the surface of the cutting device 31. The extension principle of the material return control device 32 is detailed below, and then the cutting of the corresponding plastic strip 4 is suspended to ensure that the cutting of each plastic strip 4 is synchronized.

[0034] Specifically, the adjacent sensing rails 23 clamp the corresponding sensing ring 221 and provide guidance for the lifting and lowering of the sensing ring 221, so that the sensing ring 221 can be lifted and lowered smoothly, and the plastic strips 4 pass through the sensing ring 221. When there are excess plastic strips 4, the plastic strips 4 lift the sensing ring 221 up, and when there are insufficient plastic strips 4, the plastic strips 4 drive the sensing ring 221 down.

[0035] Specifically, the cutting device 31 includes a cutting roller, a negative pressure air source for a cutting motor and an air valve. Each material return control device 32 can be slidably installed on the cutting roller. Each material return control device 32 is arranged in a straight line. The cutting roller is a hollow structure. The cutting roller is connected to the cutting negative pressure air source. An air valve is provided between the cutting negative pressure air source and the cutting roller. When each material return control device 32 is close to the guide channel 211, the negative pressure air source is connected to the cutting roller. When each material return control device 32 is away from the guide channel 211, the air valve controls the negative pressure air source to disconnect from the cutting roller. In this way, each material return control device 32 can perform cutting when it is close to the guide channel 211 and discharge particles when it is away from the guide channel 211.

[0036] Specifically, the material return control device 32 includes a pushing spring 321, a pushing plate 322 and an adsorption electromagnet 323. The adsorption electromagnet 323 and the pushing plate 322 attract each other. The pushing plate 322 is slidably installed on the cutting device 31. When the cutting negative pressure air source and the cutting roller are switched between connected and disconnected conditions, the air pressure pushes the pushing plate 322 to slide on the cutting device 31. The pushing spring 321 is installed on the cutting device 31. When the pushing spring 321 is in a free state, it pushes the pushing plate 322 to the surface of the cutting device 31, thereby stopping the cutting of the corresponding plastic strip 4.

[0037] The cutting is stopped when there is excess plastic strips 4, thereby ensuring that each plastic strip 4 is cut synchronously.

[0038] The suction cup 322 is pressed against the suction cup 323 and the suction cup 323 is pressed against the suction cup 324.

[0039] In order to ensure that the above structure can achieve material cutting, the sum of the adsorption force of the adsorption electromagnet 323 on the push plate 322 after being energized and the adsorption force generated by the negative pressure of the cutting negative pressure air source on the push plate 322 is greater than the preload force of the push compression spring 321. In order to avoid cutting when the plastic strips 4 are insufficient, the adsorption force generated by the negative pressure of the negative pressure air source on the push plate 322 is less than the preload force of the push compression spring 321.

[0040] In order to solve the power supply problem of each adsorption electromagnet 323 when following the rotation of the cutting roller, each push switch is electrically connected to the corresponding adsorption electromagnet 323 through a rotary joint.

[0041] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. EVA granulator with uniform granulation, characterized by: It includes a conveying system, a bending sensing system and a selective cutting system. The conveying system has a plastic strip input end and a plastic strip output end. The bending sensing system is installed at the plastic strip output end of the conveying system. The bending sensing system includes a bending guide plate, a plurality of sensing devices and a plurality of sensing rails. The bending guide plate is provided with a plurality of guide channels which are high in the middle and low on both sides. The top of each guide channel is provided with a sensing opening. Each sensing rail is installed on the sensing opening respectively. The sensing device is slidably installed on the sensing rail. The selective cutting system includes a cutting device and a plurality of material return control devices. Each material return control device is slidably installed on the cutting device. Each material return control device forms a cutting groove with the cutting device respectively. Each sensing device is electrically connected to a corresponding material return control device. Each sensing device controls the corresponding material return control device to slide along the cutting device. The cutting device includes a cutting roller, a negative pressure air source for a cutting motor and an air valve. Each material return control device can slide The material return control device is movably installed on the cutting roller, and each of the material return control devices is arranged in a straight line, and the cutting roller is a hollow structure, and the cutting roller is connected to the cutting negative pressure air source, and an air valve is provided between the cutting negative pressure air source and the cutting roller, and when each of the material return control devices is close to the guide channel, the negative pressure air source is connected to the cutting roller, and when each of the material return control devices is away from the guide channel, the air valve controls the negative pressure air source to be disconnected from the cutting roller, and the material return control device comprises a pushing spring, a pushing plate and an adsorption electromagnet, and the adsorption electromagnet and the pushing plate attract each other, and the pushing plate is slidably installed on the cutting device, and the pushing spring is installed on the cutting device, and when the pushing spring is in a free state, it pushes the pushing plate to the surface of the cutting device, and the adsorption force of the adsorption electromagnet on the pushing plate after being energized and the adsorption force of the negative pressure of the cutting negative pressure air source on the pushing plate are greater than the pre-tightening force of the pushing spring, so as to achieve no cutting when the plastic strips are insufficient, the adsorption force of the negative pressure of the negative pressure air source on the pushing plate is less than the pre-tightening force of the pushing spring.

2. The EVA granulator with uniform granulation according to claim 1, characterized in that: The conveying system includes a conveying mounting frame, an upper conveying device and a lower conveying roller. The upper conveying device and the lower conveying roller are both installed on the conveying mounting frame. The plastic strip input end and the plastic strip output end both point to the middle of the upper conveying device and the lower conveying roller. The lower conveying roller is transmission-connected to a conveying motor.

3. The EVA granulator with uniform granulation according to claim 2, characterized in that: The upper conveying device includes two upper conveying sliders and upper conveying rollers. The two upper conveying sliders slide along the conveying mounting frame. The two ends of the upper conveying rollers are rotatably mounted on the upper conveying sliders. Two pressurizing studs are installed on the conveying mounting frame. The two pressurizing studs press the corresponding upper conveying sliders, and the upper conveying rollers and the lower conveying rollers roll with each other.

4. The EVA granulator with uniform granulation according to claim 3, characterized in that: A pre-compression spring is arranged between the pressurizing stud and the corresponding upper conveying slide block.

5. The EVA granulator with uniform granulation according to claim 1, characterized in that: The sensing device includes a sensing ring and a sensing switch. The sensing ring rises and falls and slides along the sensing rail. The sensing switch is installed on the top of the sensing rail. The sensing switch is located on the movement trajectory of the sensing ring. When the sensing ring moves downward, the switch is pressed. When the switch is energized, the corresponding material return control device is controlled to extend until it is flush with the cutting device.

6. The EVA granulator with uniform granulation according to claim 5, characterized in that: The adjacent sensing rails clamp the corresponding sensing rings to provide guidance for the lifting and lowering of the sensing rings.

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