WO2024139553A1 - Cleaning apparatus and method for plastic product recycling - Google Patents

Abstract

A cleaning apparatus for plastic product recycling, comprising an abrasive cleaning tank (1), a conveying device (2), cleaning boxes (3) and an abrasive supply device (4). The conveying device (2) is used for inputting each cleaning box (3) into the abrasive cleaning tank (1) and outputting the cleaning box (3) to the outside of the abrasive cleaning tank (1); first impact assemblies (5) are mounted in the abrasive cleaning tank (1); each first impact assembly (5) comprises an ascending impact member (501), a first driving unit (502) for driving the ascending impact member (501) to ascend and descend, a descending impact member (503), and a second driving unit (504) for driving the descending impact member (503) to ascend and descend; the cleaning box (3) passes between the ascending impact member (501) and the descending impact member (503); the bottom of the cleaning box (3) is provided with through holes (301) allowing for the passage of the ascending impact member (501); and the abrasive supply device (4) is used for conveying abrasives into the cleaning boxes (3). Plastic products and abrasives are sequentially placed in the cleaning boxes (3), the cleaning boxes (3) are impacted by the first impact assemblies (5) to loosen dirt, after the dirt is loosened, the dirt is taken away under the action of a huge friction force generated by an impact force in combination with the abrasives, and efficient and high-quality cleaning of the plastic products is achieved by first loosing dirt and then generating a large friction force.

Description

A plastic product recycling and cleaning device and a cleaning method thereof Technical Field

The present invention relates to the field of plastic product recycling, and more specifically, to a plastic product recycling and cleaning device and a cleaning method thereof.

Background technique

There are a large number of discarded plastic products in our daily life, the most common of which are plastic bottles, plastic boxes or plastic films. Plastic products are often used to contain or include chemical products or oil products. The specific types of containers are complex and have serious pollution to the environment. If we want to effectively utilize discarded plastic products, we must effectively clean them to remove impurities on the inner and outer surfaces.

The existing recycling and cleaning of plastic products generally involves first crushing plastic bottles into plastic sheets or plastic strips, etc., and then putting them into a cleaning device for cleaning. The cleaning devices include a cleaning device for recycling waste plastics, a cleaning device for recycled plastic production, and a cleaning device for waste plastic films. The above three cleaning devices clean the waste plastic products by mechanical friction, liquid flushing and stirring, respectively, and these three cleaning methods are also commonly used cleaning methods in this field.

However, in actual applications, the effects and efficiency of these three cleaning methods are not ideal, among which liquid flushing has the worst effect. Since chemical substances such as glue or ink on plastic products cannot be cleaned by simple flushing, the liquid flushing method has obvious shortcomings. As for the other two cleaning methods, whether mechanical friction scrubbing or spiral stirring is used in a liquid environment, the essence is based on friction decontamination. However, because hot alkali and surfactant solutions will produce a strong lubricating effect on the plastic surface, the friction will decrease. Dirt has strong adhesion, and when the friction decreases and is in a low state, the cleaning effect and efficiency of the general friction decontamination method are not ideal. In addition, when using spiral stirring to clean strips or film-shaped plastics, it is easy to cause the plastic to be entangled on the stirring blade or stirring shaft.

Summary of the invention

The present invention is to overcome the problem that the plastic cleaning method in the prior art has poor effect and efficiency. Provided is a plastic product recycling and cleaning equipment, which can complete the cleaning of plastics with high efficiency and high quality.

In order to solve the above technical problems, the technical solution adopted by the present invention is: a plastic product recycling and cleaning equipment, comprising an abrasive washing tank, a conveying device, a cleaning frame installed on the conveying device and an abrasive supply device, the conveying device is used to input the cleaning frame into the abrasive washing tank and output it out of the abrasive washing tank; a first impact assembly is installed in the abrasive washing tank, the first impact assembly comprises a rising impact member, a first driving part for driving the rising impact member to rise and fall, a descending impact member and a second driving part for driving the descending impact member to rise and fall, in an initial state, the distance between the rising impact member and the descending impact member is greater than the height of the cleaning frame; the cleaning frame passes between the rising impact member and the descending impact member under the action of the conveying device; a through hole for the rising impact member to pass through is provided at the bottom of the cleaning frame; the discharge port of the abrasive supply device is located directly above the abrasive washing tank and is used to convey the abrasive into the cleaning frame.

In the above technical solution, the abrasive washing tank is filled with hot alkaline solution, the plastic products to be cleaned are placed in the cleaning frame, and the conveying device conveys the cleaning frame to the abrasive washing tank. After entering the abrasive washing tank, the specific gravity of the plastic products and the abrasives are greater than the solution in the abrasive washing tank, and no floating occurs. The abrasives are added from the top of the cleaning frame and stay in the space between the upper layer of the plastic products and the plastic products. After the abrasive enters the cleaning frame, the conveying device conveys the cleaning frame to the space between the rising impact member and the descending impact member and stays there. At this time, the through hole of the cleaning frame corresponds to the rising impact member, and the first driving unit and the second driving unit are started at the same time to continuously impact the plastic products in the cleaning frame. During the continuous impact process, the plastic products are twisted and moved, the space between the products continues to change, the abrasives and the surface of the plastic products have continuous effective friction, and the high-concentration abrasives continue to flow from the top to the bottom and both sides in the space of the cleaning frame, so that the abrasive flows like river water carrying a large amount of sediment, covering the space in the cleaning frame. The high-concentration abrasive material rubs against the large area of the plastic product surface and continuously flows to peel off and remove the dirt on the surface of the flexible plastic product, realizing the renewal of the plastic product surface and continuous friction cleaning. In combination with the hot alkali chemical cleaning on the stubborn dirt and the plastic product surface, the stubborn dirt and ink are removed in a short time. The best cleaning effect is achieved when the plastic product is twisted and moved during the impact process. Therefore, the above technical solution can achieve an ideal cleaning effect for cleaning flexible and deformable plastic products, wherein the flexible and deformable plastic product refers to a plastic product that can deform itself and the deformation will not cause damage to the plastic product.

Preferably, at least one side plate of the cleaning frame parallel to the moving direction is provided with a plurality of hollow parts. The abrasive flows out from the bottom and side plates of the cleaning frame. Due to the blocking effect of the plastic product, the abrasive flows out from the bottom very slowly. The purpose of allowing the abrasive to flow out from the bottom and side plates is to make the high concentration of The abrasive achieves continuous flow from top to bottom, and there should be no abrasive residue after cleaning. Therefore, a hollow part for the abrasive to flow out needs to be reserved to remove most of the abrasive in the subsequent cleaning tank. The small amount of residual abrasive is completely removed by intermittent water spraying and high-speed rotation in the subsequent centrifugal dehydration equipment for flexible plastic products. The size and shape regularity of flexible and deformable parts are key factors in the efficiency of abrasive cleaning and whether the abrasive can be completely removed after cleaning.

Preferably, the rising impact member includes a rising mounting plate and a plurality of rising impact parts arranged on the rising mounting plate; the falling impact member includes a falling mounting plate and a plurality of falling impact parts arranged on the falling mounting plate; the through holes correspond to the rising impact parts one by one. There will be gaps between the plurality of rising impact parts and the falling impact parts, so that when impacting a plastic product, a part of the same plastic product will be in these gaps, and the other part will come into contact with the impact part, which will make the plastic product vibrate more violently or even deform, thereby achieving a better cleaning effect. At the same time, different plastic products can also be staggered, with some plastic products rising and some plastic products falling. The staggered rising can also generate friction between the plastic products, adding an additional point for generating friction, further improving the cleaning efficiency.

Preferably, the axes of the rising impact part and the falling impact part are staggered with each other. When impacting the plastic product, the staggered rising impact part and the falling impact part will cause the plastic product to twist and bend, making it easier to loosen the dirt adhering to the plastic product.

Preferably, the abrasive supply device comprises a storage box, a discharge pipe and a return pipe both connected to the storage box, and a pump body installed in the discharge pipe and the return pipe; the other end of the return pipe is connected to the bottom of the abrasive washing tank. The abrasive that flows out of the cleaning frame or does not flow into the cleaning frame is deposited at the bottom of the abrasive washing tank, and the suction effect generated by the pump body causes this part of the abrasive to flow back to the storage box after passing through the return pipe, and then is put into the cleaning frame through the discharge pipe, so as to realize the circulation of the abrasive.

Preferably, the bottom of the abrasive washing tank is conical, and the reflux pipe is connected to the lowest point of the abrasive washing tank. The conical bottom facilitates the accumulation of abrasives, making the efficiency of abrasive recovery by suction higher.

Preferably, it also includes an ultrasonic washing tank located in front of the abrasive washing tank, and the conveying device sequentially inputs the cleaning frame into the ultrasonic washing tank and the abrasive washing tank; the ultrasonic washing tank is provided with an ultrasonic generator and a second impact component, and the structure of the second impact component is consistent with that of the first impact component. Plastic products enter the ultrasonic washing tank for cleaning before entering the abrasive washing tank. The ultrasonic washing tank loosens and peels off part of the dirt through the action of ultrasonic waves and the second impact component, thereby removing the dirt that is easier to clean. The dirt that is easier to clean here refers to the dirt that is stubborn and difficult to clean. The stubborn dirt is pre-loosened so that the dirt in the abrasive washing tank is easier to loosen, thereby improving the cleaning efficiency. High dirt removal efficiency.

Preferably, it includes a rough washing tank located in front of the ultrasonic washing tank and a washing tank located behind the abrasive washing tank, and the conveying device sequentially inputs the washing frame into the rough washing tank, the ultrasonic washing tank, the abrasive washing tank and the washing tank. Alkali solution is placed in the rough washing tank, and dirt such as dust and oil on the surface of the plastic products is soaked and removed by soaking the plastic products, so as to prevent all the dirt from entering the ultrasonic washing tank, causing the solution in the ultrasonic washing tank to be too turbid and affect the cleaning effect. There can be multiple washing tanks filled with clean water to wash away the chemical solution and abrasive on the plastic products.

Preferably, the ultrasonic washing tank and the abrasive washing tank are both connected to the liquid inlet of the filter, the clean water outlet of the filter is both connected to the ultrasonic washing tank and the abrasive washing tank, and the turbid liquid outlet is connected to the rough washing tank. The impurities in the liquid of the ultrasonic washing tank and the abrasive washing tank will increase, so the liquid is replaced after a period of use, and if all is discharged, it will cause waste, so the liquid of the ultrasonic washing tank and the abrasive washing tank is filtered through the effect of the filter, and the clear liquid after filtration is recycled and discharged into the ultrasonic washing tank and the abrasive washing tank, while the turbid liquid is discharged into the rough washing tank, finally realizing the recycling of resources.

Preferably, the conveying device includes a frame, tracks installed on the frame, a conveying chain running along the track, and a driving device driving the conveying chain to move; the conveying chain includes a plurality of equally spaced running parts, the running parts include a fixed part and a running wheel installed on the fixed part, the running wheel is connected to the track in a rolling manner, and the driving device includes a gear or a sprocket engaged with the running wheel; the fixed part is connected to the cleaning frame. One end of the fixed part can be directly connected to the cleaning frame or connected to the cleaning frame through a connecting rod. The gear or sprocket of the driving device is driven and rotated by a motor, and during the rotation process, the tooth groove on the gear or sprocket corresponds to the running wheel, so that the rotation action of the gear or sprocket is converted into an action of pushing the running wheel to run on the track. The track has a lifting part between two adjacent grooves, and the running part drives the cleaning frame out of the groove by entering the lifting part, and the cleaning frame enters the groove by leaving the lifting part.

A plastic product recycling and cleaning method comprises the following steps:

Step 1: Place the plastic products into the cleaning frame;

Step 2: Place the cleaning frame into a washing tank filled with alkaline solution for soaking;

Step 3: After the soaking time in step 2 reaches the set threshold, take out the cleaning frame and put it into a washing tank filled with an alkaline solution at a temperature of 45-55 degrees for vibration cleaning. The specific vibration method is to perform mechanical impact and ultrasonic vibration on the plastic product;

Step 4: When the cleaning time in step 3 reaches the set threshold, take out the cleaning frame and put it into the In a washing tank filled with alkaline solution at a temperature of 65-75 degrees, abrasive is put into the cleaning frame and the plastic products are mechanically impacted;

Step 5: After the cleaning time in step 4 reaches the set threshold, take out the cleaning frame and put it into a washing tank filled with clean water to remove the chemical solution and abrasive on the surface of the plastic product.

Compared with the prior art, the beneficial effects of the present invention are: plastic products and abrasives are placed in the cleaning frame in sequence, the cleaning frame is impacted by the first impact component to loosen the dirt, and after the dirt is loosened, the impact force combined with the huge friction force generated by the abrasive takes the dirt away, and the dirt is loosened first and then the large friction force is generated to achieve efficient and high-quality cleaning of the plastic products.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a plastic product recycling and cleaning device according to Example 1;

FIG2 is a schematic structural diagram of an abrasive washing tank in Example 1;

FIG3 is a schematic structural diagram of an ascending impact member, a descending impact member and a cleaning frame of Embodiment 1;

FIG4 is a schematic structural diagram of a plastic product recycling and cleaning device according to Embodiment 2;

FIG5 is a schematic diagram of the structure of the ultrasonic washing tank of Example 2;

Figure 6 is a schematic diagram of the structure of the conveyor chain and track of Example 3.

Detailed ways

The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

Example 1

As shown in Figures 1-3, an embodiment 1 of a plastic product recycling and cleaning device is shown, in which the plastic product is a plastic strip as an example, and the device comprises an abrasive washing tank 1, a conveying device 2, a cleaning frame 3 installed on the conveying device 2, and an abrasive supply device 4, wherein the conveying device 2 is used to input the cleaning frame 3 into the abrasive washing tank 1 and output it to the outside of the abrasive washing tank 1; a first impact assembly 5 is installed in the abrasive washing tank 1, and the first impact assembly 5 comprises a rising impact member 501, a first driving part 502 for driving the rising impact member 501 to rise and fall, a falling impact member 503, and a second driving part 504 for driving the falling impact member 503 to rise and fall, and in an initial state, the distance between the rising impact member 501 and the falling impact member 503 is greater than the height of the cleaning frame 3; the cleaning frame 3 passes between the rising impact member 501 and the falling impact member 503 under the action of the conveying device 2; a through hole 301 is provided at the bottom of the cleaning frame 3 for the rising impact member 501 to pass through; the discharge port of the abrasive supply device 4 is located directly above the abrasive washing tank 1 and is used to convey the abrasive into the cleaning frame 3.

Specifically, the two side plates of the cleaning frame 3 parallel to the direction of movement are provided with a plurality of hollow parts 302. In the present embodiment, the combination of the hollow parts 302 forms a grid shape. The abrasive flows out from the bottom and side plates of the cleaning frame 3. Due to the blocking effect of the plastic products, the speed at which the abrasive flows out from the bottom is very slow. The purpose of allowing the abrasive to flow out from the bottom and side plates is to enable the high-concentration abrasive to flow continuously from top to bottom during the cleaning process, and to ensure that there is no abrasive residue at all after the cleaning is completed. Therefore, it is necessary to reserve a hollow part for the abrasive to flow out, so as to remove most of the abrasive in the subsequent cleaning tank. The small amount of residual abrasive is completely removed by intermittent water spraying and high-speed rotation in the subsequent centrifugal dehydration equipment for flexible plastic products. The size and regularity of the shape of the flexible and deformable parts are the key factors for the efficiency of abrasive cleaning and whether the abrasive can be completely removed after cleaning. Therefore, the cleaning of the plastic strip in the present embodiment can ensure the removal of the abrasive on the plastic strip. In order to prevent the abrasive from being lost too quickly, the flow direction of the abrasive cannot be along the movement direction of the cleaning frame 3, that is, the direction of the water flow. Since the abrasive is not easily carried away by the water flow, the flow of the abrasive is slow and will be confined in the cleaning frame 3. In this embodiment, the diameter of the granular abrasive is 3 to 8 mm, the density is >1g/cm 3, and the abrasive material can be stainless steel, aluminum alloy, filled modified plastic, etc.

Among them, the rising impact member 501 includes a rising mounting plate 5011 and a plurality of rising impact parts 5012 arranged on the rising mounting plate 5011; the descending impact member 503 includes a descending mounting plate 5031 and a plurality of descending impact parts 5032 arranged on the descending mounting plate 5031; and the through hole 301 corresponds to the rising impact part 5012 one by one. There will be gaps between the plurality of rising impact parts 5012 and the descending impact parts 5032, so that when colliding with the plastic product, part of the same plastic product will be in these gaps, and the other part will come into contact with the impact part, which will make the plastic product vibrate more violently or even deform, so as to achieve a better cleaning effect. At the same time, it can also make different plastic products staggered, with some plastic products rising and some plastic products falling. The plastic products are descending and the staggered ascending can also generate friction between the plastic products, adding a friction generating point, further improving the cleaning efficiency. Furthermore, the axes of the ascending impact part 5012 and the descending impact part 5032 are staggered with each other. When striking the plastic products, the staggered ascending impact part 5012 and the descending impact part 5032 will cause the plastic products to twist and bend, making it easier to loosen the dirt adhering to the plastic products.

In this embodiment, there are multiple ascending impact parts 5012 and descending impact parts 5032, and they are distributed in a rectangular array. The shapes of the two can be polygonal columns, cones or cylinders. In this embodiment, the shape is a cylinder, which is convenient for alignment with the through hole 301 and is easier to pass through the through hole 301. In addition, the end surface area of the cylinder is larger, which can better press the plastic strip and the abrasive to apply pressure to the two, so that there is greater friction between the two, and the dirt is loosened and taken away by the abrasive.

In this embodiment, the first driving part 502 and the second driving part 504 are both cylinders; if the axes of the rising impact part 5012 and the falling impact part 5032 are collinear, the stroke limit of the cylinder is to make the distance between the rising impact part 5012 and the falling impact part 5032 zero. If the axes of the rising impact part 5012 and the falling impact part 5032 are not collinear and are staggered, the stroke of the cylinder is to make the distance between the rising impact part 5012 and the falling impact part 5032 negative, and the negative distance means that the vertical height of the top end of the rising impact part 5012 in this state is higher than the bottom end of the falling impact part 5032.

Preferably, the abrasive supply device 4 includes a storage box 401, a discharge pipe 402 and a return pipe 403 both connected to the storage box 401, and a pump body installed in the discharge pipe 402 and the return pipe 403; the other end of the return pipe 403 is connected to the bottom of the abrasive washing tank 1. The abrasive that flows out of the cleaning frame 3 or does not flow into the cleaning frame 3 is deposited at the bottom of the abrasive washing tank 1. The suction effect generated by the pump body allows this part of the abrasive to flow back into the storage box 401 after passing through the return pipe 403, and then is put into the cleaning frame 3 through the discharge pipe 402, so as to realize the circulation of the abrasive. In this embodiment, the bottom of the abrasive washing tank 1 is conical, and the return pipe 403 is connected to the lowest point of the abrasive washing tank 1. The conical bottom facilitates the accumulation of abrasives, making the efficiency of suction recovery of abrasives higher.

In this embodiment, the first impact assembly 5 is fixed to the side walls of the abrasive washing tank 1, and the cleaning frames 3 are installed at both ends of the conveying device 2. A plurality of first impact assemblies 5 are arranged along a straight line in the abrasive washing tank 1, and each impact assembly is a stop processing station. The conveying device 2 allows the cleaning frame 3 to pass through each first impact assembly 5 in turn in a stepping manner and stay for a set threshold.

In addition, the conveying device 2 can be a chain lifting conveyor or a track 201 conveyor, which can move the cleaning frame 3 in the vertical direction to enter and exit the abrasive washing tank 1.

The working principle or working process of this embodiment is as follows: the abrasive washing tank 1 is filled with hot alkaline solution, the plastic products to be cleaned are placed in the cleaning frame 3, the conveying device 2 conveys the cleaning frame 3 to the abrasive washing tank 1, and after entering the abrasive washing tank 1, the abrasive flowing out of the discharge end of the abrasive supply device 4 enters the cleaning frame 3 from the bottom opening of the cleaning frame 3. The specific gravity of the plastic products and the abrasives is greater than that of water, and they will not float. The abrasives entering the cleaning frame 3 are blocked by the plastic products and are retained in the uppermost layer of the plastic products. After the abrasive enters the cleaning frame 3, the conveying device 2 conveys the cleaning frame 3 to between the rising impact member 501 and the descending impact member 503 and stays there. At this time, the through hole 301 of the cleaning frame 3 corresponds to the rising impact member 501, and the first driving unit 502 and the second driving unit 504 are started at the same time to continuously impact the plastic products in the cleaning frame 3. During the continuous impact, the plastic products are twisted and moved, the space between the products is continuously changing, the abrasive and the surface of the plastic products are continuously effectively rubbed, and the high-concentration abrasive also continuously flows from the top to the bottom and both sides in the space of the cleaning frame, so that the abrasive flows like river water carrying a large amount of sediment, covering the space in the cleaning frame. The high-concentration abrasive rubs against the large area of the surface of the plastic products and continuously flows to peel off and remove the dirt on the surface of the flexible plastic products, so as to achieve the renewal and continuous friction cleaning of the surface of the plastic products. In combination with the synergistic effect of hot alkali chemical cleaning on stubborn dirt and the surface of the plastic products, stubborn dirt and ink are removed in a short time. In addition, since the plastic products and the abrasive are both confined in the cleaning frame 3 with a narrow space range, it is difficult for the two to flow to other places. The impact force of the abrasive and the plastic products is pressed together. Due to the large instantaneous impact force, huge pressure will be generated between the two, thereby greatly improving the friction between the two, so that the plastic strips have continuous effective friction. It should be further explained that the plastic strips are plastic strips with a density greater than 1, which can stay in the cleaning basket 301.

The beneficial effects of this embodiment are as follows: the plastic products and the abrasive are placed into the cleaning frame 3 in sequence, and the cleaning frame 3 is impacted by the first impact component 5 to loosen the dirt. After the dirt is loosened, the impact force combined with the huge friction force generated by the abrasive takes the dirt away. The dirt is loosened first and then the large friction force is generated to achieve efficient and high-quality cleaning of the plastic products.

Example 2

Embodiment 2 of a plastic product recycling and cleaning device is based on Embodiment 1, but differs from Embodiment 1 in that the arrangement of the cleaning device is further limited.

As shown in Fig. 4-5, a plastic product recycling and cleaning device also includes an ultrasonic washing tank 6 located in front of the abrasive washing tank 1, a rough washing tank 7 located in front of the ultrasonic washing tank 6, and a washing tank 8 located behind the abrasive washing tank 1. The conveying device 2 sequentially inputs the cleaning frame 3 to the rough washing tank 7, the ultrasonic washing tank 6, the abrasive washing tank 1 and the washing tank 8. The ultrasonic washing tank 6 is provided with an ultrasonic generator 601 and a second impact component 602. The second impact component 602 has the same structure as the first impact component 5. Alkaline solution is placed in the rough washing tank 7, and the floating dust and floating oil on the surface of the plastic products are soaked and removed by soaking the plastic products, so as to prevent all the dirt from entering the ultrasonic washing tank 6, which will cause the solution in the ultrasonic washing tank 6 to be too turbid and affect the cleaning effect. The plastic products enter the ultrasonic washing tank 6 for cleaning before entering the abrasive washing tank 1. The ultrasonic washing tank 6 loosens and peels off part of the dirt through the action of ultrasonic waves and the second impact component 602, so as to remove the dirt that is easier to clean. The dirt that is easier to clean here refers to the dirt that is stubborn and difficult to clean. The stubborn dirt is pre-loosened so that the dirt in the abrasive washing tank 1 is easier to loosen, thereby improving the dirt removal efficiency. Two washing tanks 8 can be provided, which are filled with clean water to wash away the chemical solution and abrasive on the plastic products.

In the present embodiment, the side wall in the washing tank 8 is provided with a wave-making device, a spraying device or a flow-pushing device, and the wave direction of the wave-making device, the spraying direction of the spraying device or the flow-pushing direction of the flow-pushing device are all toward the side plate of the cleaning frame 3, and more preferably, they are all tilted upward toward the side plate of the cleaning frame 3. Since the abrasive mostly flows out from the side plate of the cleaning frame 3, the water flow direction is artificially created in the washing tank 8 to allow water to flow in from the side plate and then flow out from the side plate on the other side, which makes it easier to take away the abrasive on the surface of the plastic product. The surging of water from bottom to top can make the plastic products float to a certain extent, so that the abrasive between the plastic products can also be taken away by the water flow. In this way, the removal efficiency and removal quality of the abrasive are further improved, and the surface residue of the plastic products can be better achieved to meet the recycling requirements.

Furthermore, the ultrasonic washing tank 6 and the abrasive washing tank 1 are both connected to the liquid inlet of the filter 9, the clean water outlet of the filter 9 is both connected to the ultrasonic washing tank 6 and the abrasive washing tank 1, and the turbid liquid outlet is connected to the rough washing tank 7. The impurities in the liquid of the ultrasonic washing tank 6 and the abrasive washing tank 1 will increase, so the liquid is replaced after a period of use, and if all is discharged, it will cause waste, so the liquid of the ultrasonic washing tank 6 and the abrasive washing tank 1 is filtered through the filter 9, and the clear liquid after filtration is recycled and discharged into the ultrasonic washing tank 6 and the abrasive washing tank 1, and the turbid liquid is discharged into the rough washing tank 7, finally realizing the recycling of resources.

The remaining features and principles of this embodiment are consistent with those of Embodiment 1.

Example 3

Embodiment 3 of a plastic product recycling and cleaning device is based on Embodiment 1 or Embodiment 2, and differs from the above embodiments in that the conveying device 2 is further limited.

As shown in FIG6 , the conveying device 2 includes a frame, a track 201 mounted on the frame, a conveying chain running along the track 201, and a driving device driving the conveying chain to move; the conveying chain includes a plurality of equidistantly arranged The walking member 202 includes a fixed portion 2021 and a walking wheel 2022 and an auxiliary wheel 2023 installed on the fixed portion 2021. The walking wheel 2022 is located at the center of the fixed portion 2021, and the auxiliary wheels 2023 are located on both sides of the fixed portion 2021. The walking wheel 2022 and the auxiliary wheels 2023 are rollingly connected to the track 201. The driving device includes a gear or a sprocket engaged with the walking wheel 2022; the fixed portion 2021 is connected to the cleaning frame 3. One end of the fixed portion 2021 can be directly connected to the cleaning frame 3 or connected to the cleaning frame 3 through a connecting rod 2024. The gear or sprocket of the driving device is driven and rotated by a stepper motor, and during the rotation process, the tooth groove on the gear or sprocket corresponds to the walking wheel 2022, so that the rotation action of the gear or sprocket is converted into an action of pushing the walking wheel 2022 to walk on the track 201. The track 201 has a lifting portion between two adjacent grooves. The walking member 202 drives into the lifting portion to make the cleaning frame 3 leave the groove, and leaves the lifting portion to make the cleaning frame 3 enter the groove.

In this embodiment, the track 201 is in a ring shape, and the driving devices are located at the four end corners of the track 201. After cleaning, the plastic products can be dripped and dried. In order to save working space, the ring is a three-dimensional ring, and all washing tanks are located on the ground.

In this embodiment, both ends of the fixing portion 2021 are connected to the cleaning frame 3 via connecting rods 2024. The connecting rods 2024 allow the cleaning frame 3 to droop below the liquid level in the washing tank without the track 201 having to enter below the liquid level, thereby preventing the liquid from affecting the operation of the track 201.

The remaining features and principles of this embodiment are consistent with any of the above embodiments.

Example 4

An embodiment of a plastic product recycling and cleaning method, based on the plastic product recycling and cleaning equipment of the above embodiments 1-3, comprises the following steps:

Step 1: Place the plastic product into the cleaning frame 3;

Step 2: Place the cleaning frame 3 into a washing tank filled with alkaline solution for soaking; remove dirt such as dust and oil on the surface of the plastic products by soaking the plastic products, and prevent all of these dirt from entering the next washing tank, causing the solution in the next washing tank to be too turbid and affecting the cleaning effect.

Step 3: After the immersion time in step 2 reaches the set threshold, the cleaning frame 3 is taken out and placed in a washing tank filled with an alkaline solution at a temperature of 45-55 degrees for vibration cleaning. The specific vibration method is to perform mechanical impact and ultrasonic vibration on the plastic product; the ultrasonic washing tank 6 loosens and peels off part of the dirt through the action of ultrasonic waves and mechanical vibrations, thereby removing the dirt that is easier to clean. The dirt that is easier to clean here refers to the stubborn dirt that is difficult to clean.

Step 4: After the cleaning time of step 3 reaches the set threshold, take out the cleaning frame 3 and put it into the In a washing tank of alkaline solution at a temperature of 65-75 degrees, abrasives are put into the washing frame 3 and the plastic products are mechanically impacted; the stubborn dirt and ink are removed by the combination of mechanical impact vibration and abrasives and the synergistic effect of the hot alkaline solution.

Step 5: After the cleaning time of step 4 reaches the set threshold, the cleaning frame 3 is taken out and placed in a washing tank filled with clean water to remove the chemical solution and abrasive on the surface of the plastic product;

Step 6: Allow the cleaned plastic products to drip dry.

The beneficial effects of this embodiment are as follows: in the process of cleaning the plastic products in sequence, the concentration of the solution during ultrasonic cleaning is ensured by rough washing, so as to have a high cleaning efficiency. The dirt is pre-loosened by ultrasonic and mechanical impact, and the dirt on the plastic products is further loosened in the process of the impact and the abrasive, and then the loosened dirt is taken away by the abrasive that moves relative to the plastic products. Since the plastic products and the abrasive are both confined in the cleaning frame 3 with a narrow space range, the impact force of the abrasive and the plastic products is pressed together when there is no place for the two to flow. Due to the large instantaneous impact force, a huge pressure is generated between the two, so that the friction between the two is greatly improved, thereby achieving high-efficiency and high-quality cleaning of plastic products.

Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

A plastic product recycling and cleaning device, characterized in that it comprises an abrasive washing tank (1), a conveying device (2), a cleaning frame (3) installed on the conveying device (2), and an abrasive supply device (4), wherein the conveying device (2) is used to input the cleaning frame (3) into the abrasive washing tank (1) and output it to the outside of the abrasive washing tank (1); a first impact assembly (5) is installed in the abrasive washing tank (1), and the first impact assembly (5) comprises an ascending impact member (501), a first driving part (502) for driving the ascending impact member (501) to rise and fall, a descending impact member (503), and a driving part (504) for driving the descending impact member (503). The invention relates to a second driving part (504) for lifting and lowering the abrasive material washing tank (1), wherein in an initial state, the distance between the ascending impact member (501) and the descending impact member (503) is greater than the height of the cleaning frame (3); the cleaning frame (3) passes between the ascending impact member (501) and the descending impact member (503) under the action of the conveying device (2); a through hole (301) for the ascending impact member (501) to pass through is provided at the bottom of the cleaning frame (3); the discharge port of the abrasive supply device (4) is located directly above the abrasive washing tank (1) and is used to convey the abrasive material into the cleaning frame (3). The plastic product recycling and cleaning equipment according to claim 1 is characterized in that at least one side plate of the cleaning frame (3) parallel to the movement direction is provided with a plurality of hollow portions (302). A plastic product recycling and cleaning device according to claim 1, characterized in that the rising impact member (501) includes a rising mounting plate (5011) and a plurality of rising impact parts (5012) arranged on the rising mounting plate (5011); the descending impact member (503) includes a descending mounting plate (5031) and a plurality of descending impact parts (5032) arranged on the descending mounting plate (5031); and the through hole (301) corresponds one-to-one to the rising impact part (5012). The plastic product recycling and cleaning equipment according to claim 3 is characterized in that the axes of the rising impact part (5012) and the descending impact part (5032) are staggered with each other. The plastic product recycling and cleaning equipment according to claim 1 is characterized in that the abrasive supply device (4) includes a storage box (401), a discharge pipe (402) and a return pipe (403) both connected to the storage box (401), and a pump body both installed on the discharge pipe (402) and the return pipe (403); the other end of the return pipe (403) is connected to the bottom of the abrasive washing tank (1). A plastic product recycling and cleaning device according to any one of claims 1 to 5, characterized in that it also includes an ultrasonic washing tank (6) located in front of the abrasive washing tank (1), and the conveying device (2) sequentially inputs the cleaning frame (3) into the ultrasonic washing tank (6) and the abrasive washing tank (1); the ultrasonic An ultrasonic generator (601) and a second impact component (602) are arranged in the wave washing tank (6); the second impact component (602) has the same structure as the first impact component (5). The plastic product recycling and cleaning equipment according to claim 6 is characterized in that it includes a rough washing tank (7) located in front of the ultrasonic washing tank (6) and a washing tank (8) located behind the abrasive washing tank (1), and the conveying device (2) inputs the cleaning frame (3) into the rough washing tank (7), the ultrasonic washing tank (6), the abrasive washing tank (1) and the washing tank (8) in sequence. The plastic product recycling and cleaning equipment according to claim 7 is characterized in that the ultrasonic washing tank (6) and the abrasive washing tank (1) are both connected to the liquid inlet end of the filter (9), the clean water outlet end of the filter (9) is connected to the ultrasonic washing tank (6) and the abrasive washing tank (1), and the turbid liquid outlet end is connected to the rough washing tank (7). A plastic product recycling and cleaning device according to claim 6, characterized in that the conveying device (2) includes a frame, tracks (201) installed on the frame, a conveying chain running along the track (201) and a driving device driving the conveying chain to move; the conveying chain includes a plurality of equally spaced walking parts (202), the walking parts (202) include a fixed part (2021) and a walking wheel (2022) installed on the fixed part (2021), the walking wheel (2022) is rollingly connected to the track (201), and the driving device includes a gear or a sprocket engaged with the walking wheel (2022); the fixed part (2021) is connected to the cleaning frame (3). A plastic product recycling and cleaning method, characterized in that it comprises the following steps: Step 1: Place the plastic products into the cleaning frame; Step 2: Place the cleaning frame into a washing tank filled with alkaline solution for soaking; Step 3: After the soaking time in step 2 reaches the set threshold, take out the cleaning frame and put it into a washing tank filled with an alkaline solution at a temperature of 45-55 degrees for vibration cleaning. The specific vibration method is to perform mechanical impact and ultrasonic vibration on the plastic product; Step 4: After the cleaning time of step 3 reaches the set threshold, the cleaning frame is taken out and placed in a washing tank filled with an alkaline solution at a temperature of 65-75 degrees, and abrasives are added into the cleaning frame to mechanically impact the plastic product; Step 5: After the cleaning time in step 4 reaches the set threshold, take out the cleaning frame and put it into a washing tank filled with clean water to remove the chemical solution and abrasive on the surface of the plastic product.