Plastic granulation device for environment-friendly plastic processing

Abstract

The invention discloses an environment-friendly plastic granulating device for plastic processing, and relates to the technical field of plastic granulating devices.The environment-friendly plastic granulating device comprises a heating charging barrel fixedly mounted on a main body rack and used for melting and extruding plastic; the granulating machine box and the main body rack are arranged on the ground side by side, the interior of the granulating machine box is divided into a flow guide cavity and a cooling cavity through a partition plate, cooling liquid is contained in the cooling cavity, and a cooling mechanism used for cooling plastic is installed at the cooling cavity; a flow guide mechanism used for guiding plastics into the cooling mechanism from the outlet of the heating charging barrel is mounted at the flow guide cavity; according to the plastic granulating machine, indirect contact between the plastic and cooling liquid is achieved through the closed cooling mechanism, the adjustable flow guide mechanism and the precise cutting mechanism are combined, generation of harmful substances is effectively avoided, the cooling uniformity and the granulating consistency are improved, the cooling efficiency is improved, and the plastic granulating machine is suitable for large-scale production. The method has the advantages of avoiding water pollution, improving product quality and reducing environment-friendly treatment cost.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of plastic granulation devices, in particular to an environment-friendly plastic granulation device for plastic processing. BACKGROUND

[0002] Plastic granulation is a key process in plastic recycling and processing, and its working principle is that plastic is melted and plasticized by a screw extruder, then extruded into a strip or a belt through a die hole, and then the extruded plastic is introduced into cold water for cooling and solidification, and finally the hardened plastic is cut into particles by a granulation device. However, the traditional granulation device has obvious environmental defects and technical limitations: first, when the high-temperature plastic in a molten state directly contacts the cooling water, not only will it cause some components in the plastic to chemically react with the water, affecting the forming quality of the final product, but also will cause the generation of harmful substances. Taking PET plastic as an example, the antimony catalyst used in its production process will precipitate heavy metal ions in a high-temperature water environment, and these pollutants will not only reduce the quality of the plastic, but also cause serious water pollution. Secondly, the cooling system of the existing equipment often adopts an open design, which cannot accurately control the cooling process, resulting in uneven cooling of the plastic and affecting the particle forming quality. Thirdly, the flow guide system of the traditional device lacks adjustability and is difficult to adapt to the processing needs of different specifications of plastic strips. Finally, the conventional cutting mechanism has problems such as insufficient positioning accuracy and inconvenient blade adjustment, resulting in poor consistency of the granulation size. These problems not only affect the product quality, but also increase the cost of wastewater treatment and the burden of environmental governance. In view of the above problems, the existing technology needs to be improved. SUMMARY

[0003] The purpose of the present application is to provide an environment-friendly plastic granulation device for plastic processing, which solves the technical problem that the traditional device adopts an open cooling tank structure, and the molten plastic is directly immersed in cooling water after extrusion, which cannot avoid the direct contact between the material and the cooling medium. This contact not only affects the quality of the plastic forming, but also produces wastewater containing heavy metals, increasing the cost of subsequent purification treatment.

[0004] The purpose of the present application can be achieved by the following technical solutions: An environment-friendly plastic granulation device for plastic processing, comprising: a main body frame serving as a main support; a heating barrel fixedly installed on the main body frame and used for melting and extruding plastic, a spiral extrusion rod being arranged in the heating barrel; a barrel motor fixedly installed on the heating barrel and used for driving the spiral extrusion rod to extrude the melted plastic; Screw pipe, fixedly installed above the heating barrel, its outlet is connected with the inlet of the heating barrel through a flange, a funnel-shaped feeding hopper is connected at the inlet, an upper feeding screw rod is rotatably installed inside the screw pipe, and an upper feeding motor is fixedly installed on the outer wall of the screw pipe for driving the upper feeding screw rod to rotate; Granulator box, which is arranged on the ground side by side with the main body frame, is divided into a flow guide cavity and a cooling cavity by a partition plate inside the granulator box, the cooling cavity is filled with cooling liquid, and a cooling mechanism for cooling plastic is installed at the cooling cavity; a flow guide mechanism for guiding the plastic from the outlet of the heating barrel into the cooling mechanism is installed at the flow guide cavity; Cutting mechanism, which is installed on the side of the granulator box away from the main body frame, is used for cutting and granulating the plastic.

[0005] Preferably, a collecting hopper is fixedly connected at the outlet of the heating barrel, and a collecting vertical sleeve connected with the flow guide mechanism is fixedly connected to the collecting hopper.

[0006] Preferably, the cooling mechanism comprises: Cooling connecting pipes, which are arranged in multiple groups from top to bottom in the cooling cavity, and each group is arranged side by side with multiple cooling connecting pipes, and the diameters of the cooling connecting pipes from top to bottom decrease in turn; A leak-proof shield is sleeved on the outer side of the upper part of the cooling connecting pipe, and half of the outer periphery of the cooling connecting pipe is directly in contact with the cooling liquid, thereby improving the cooling and solidification efficiency of the plastic.

[0007] Preferably, the cooling mechanism further comprises: A connecting shaft, which is arranged in multiple groups along the axial direction of the cooling connecting pipe and is rotatably installed on the granulator box; A pushing roller, which is fixedly installed on the connecting shaft, is used for pushing the hardened plastic to the cutting mechanism for cutting and granulating, and an avoiding hole for avoiding the pushing roller is arranged on the side wall of the cooling connecting pipe; A pushing motor, which is fixedly installed on the side wall of the cooling cavity, is used for driving the connecting shaft to rotate; A pulley, which is fixedly installed on the side of the connecting shaft away from the pushing motor, is drivingly connected through a transmission belt between multiple groups of pulleys at the same height.

[0008] Preferably, the flow guide mechanism comprises: A discharging guide pipe, which is fixedly arranged in the collecting hopper and the granulator box, is used for guiding and directing the extruded rubber strip; A lifting guide sleeve, which is slidably sleeved on the outer periphery of the collecting vertical sleeve, is fixedly provided with sliding guide pipes equal in number to the discharging guide pipes inside the lifting guide sleeve; A sliding guide pipe, which is slidably connected at one end in the discharging guide pipe and is in communication at the other end with the cooling mechanism, is used for guiding the plastic into the cooling mechanism, and an inlet chamfer is arranged at the inlet of the sliding guide pipe inside the discharging guide pipe.

[0009] Preferably, the flow guide mechanism further comprises: The cylinder seat plate is fixedly installed on the upper end of the partition plate. The flow guide cylinder is fixedly installed on the cylinder seat plate, and the output end of the flow guide cylinder is fixedly connected to the lifting guide sleeve, so as to drive the lifting guide sleeve to move up and down and connect with cooling mechanisms of different sizes.

[0010] Preferably, the end of the lifting guide sleeve close to the partition plate is fixedly connected with a material guide sliding plate, the partition plate is provided with a vertical sliding groove in sliding cooperation with the material guide sliding plate, and the partition plate is provided with a funnel hole at a position connected with the cooling mechanism to facilitate the flow of plastic.

[0011] Preferably, the granulator box is fixedly provided with a cutting frame on the side away from the flow guide mechanism, and the cutting frame is provided with cutting sliding grooves at both ends. The cutting mechanism comprises: The cutting seat plate is fixedly installed on the middle part of the upper end of the cutting frame, and the cutting seat plate is fixedly installed with a vertically downward cutting cylinder. The lifting frame is slidingly connected between the two groups of cutting sliding grooves, and the lifting frame is fixedly installed with a cylinder connecting plate, and the cylinder connecting plate is fixedly connected with the output end of the cutting cylinder. The cutting knife is detachably installed on the lifting frame by means of a countersunk screw, and is used for cutting and granulating the plastic strips.

[0012] Preferably, a plurality of guide sliding blocks are slidingly connected to both sides of the lifting frame, guide sliding blocks of the same height are fixedly connected with a cutting knife seat plate for installing the cutting knife, a plurality of adjusting bolts are threadedly connected to the lifting frame, the positions and numbers of the adjusting bolts correspond to the cutting knife seat plate, the end of the adjusting bolt is rotatably connected to the cutting knife seat plate, the relative position of the cutting knife seat plate and the lifting frame is adjusted by rotating the adjusting bolt, so as to adjust the distance between the cutting knife and the outlet of the cooling mechanism, and realize the cutting and granulation of plastic of different particle sizes.

[0013] Preferably, the cutting knife seat plate is provided with a cutting knife groove for installing the cutting knife at the lower part of the end away from the adjusting bolt, the upper part of the cutting knife has a thickness equal to the depth of the cutting knife groove, the lower part of the side of the cutting knife close to the cutting knife seat plate is provided with an inclined blade, the side of the cutting knife away from the cutting knife seat plate is a vertical blade surface, and the cutting knife is provided with a countersunk hole for installing a countersunk screw. After the cutting knife is fixedly installed, the vertical blade surface of the cutting knife is flush with the end surface of the cutting knife seat plate, so as to ensure that the cutting knife can accurately cut plastic of different particle sizes.

[0014] The beneficial effects of the present application are: The indirect contact between the plastic and the cooling liquid is realized through the closed cooling mechanism, the adjustable flow guide mechanism and the precise cutting mechanism are combined, harmful substances are effectively avoided, the cooling uniformity and the granulation consistency are improved, the water pollution is avoided, the product quality is improved and the environmental protection treatment cost is reduced.

[0015] The closed cooling environment avoids the chemical reaction between the high-temperature plastic and the cooling medium, and reduces the generation amount of the polluted wastewater. The staged cooling process guarantees the forming quality of the plastic, and reduces the wastewater treatment cost. The flow guide mechanism and the cooling mechanism realize the continuous production, guarantee the granulation efficiency and meet the environmental protection requirements.

[0016] Through the gradient cooling structure with the gradually decreasing pipe diameter and the semi-closed protective cover design, the outer layer of the plastic is formed into a solidification barrier, and then is fully cooled, the product defects caused by the rapid cooling are avoided, and the generation amount of the pollutants is significantly reduced by reducing the effective contact area and the contact time. BRIEF DESCRIPTION OF DRAWINGS

[0017] The application will be further described below with reference to the drawings.

[0018] Figure 1 is a perspective structural schematic view of a plastic granulating device for plastic processing according to the application; Figure 2 is an axonometric structural schematic view of a plastic granulating device for plastic processing according to the application; Figure 3 is a perspective structural schematic view of a granulator box according to the application; Figure 4 is an axonometric structural schematic view of a granulator box according to the application; Figure 5 is a front view structural schematic view of a granulator box according to the application; Figure 6 is a top view structural schematic view of a granulator box according to the application; Figure 7 is a sectional view structural schematic view of the application in A-A direction; Figure 5 Figure 8 is a sectional view structural schematic view of the application in B-B direction; Figure 5 Figure 9 is an enlarged structural schematic view of A in the application; Figure 8 is a perspective structural schematic view of a cutting mechanism according to the application; Figure 10 is an axonometric structural schematic view of a cutting mechanism according to the application; Figure 11 Figure 12 Figure 8 ​​​​Enlarged structure schematic diagram at B in the middle.

[0019] In the figure: 1, main body frame; 2, heating cylinder; 3, cylinder motor; 4, spiral material pipe; 5, feeding hopper; 6, feeding motor; 7, feeding screw; 8, material collecting hopper; 81, material collecting vertical sleeve; 9, granulator box; 91, flow guide cavity; 92, cooling cavity; 93, cutting frame; 94, partition plate; 941, funnel hole; 95, vertical chute; 96, cutting chute; 10, flow guide mechanism; 101, discharge guide pipe; 102, lifting guide sleeve; 103, sliding guide pipe; 1031, feeding chamfer; 104, material guide sliding plate; 105, cylinder seat plate; 106, flow guide cylinder; 11, cooling mechanism; 111, cooling connecting pipe; 1111, avoidance hole; 112, leak-proof shield; 113, connecting shaft; 114, material pushing roller; 115, material pushing motor; 116, pulley; 117, transmission belt; 12, cutting mechanism; 121, cutting seat plate; 122, cutting cylinder; 123, lifting frame; 124, cylinder connecting plate; 125, adjusting bolt; 126, guide sliding block; 127, cutter seat plate; 1271, cutter groove; 128, cutting knife; 1281, inclined blade; 129, countersunk screw. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0021] In the prior art, direct contact of molten plastic with cooling water during plastic granulation can cause chemical reaction between the material components and water, for example, antimony catalyst in PET material precipitates to form contaminated wastewater in high-temperature cooling water. The traditional device adopts an open cooling tank structure, and the molten plastic is directly immersed in the cooling water after extrusion, which cannot avoid direct contact between the material and the cooling medium. Such contact not only affects the quality of the plastic molded product, but also produces wastewater containing heavy metals, increasing the subsequent purification treatment cost.

[0022] In order to solve the above problems, the researchers found that the generation of pollutants is related to the direct contact in the cooling stage, and tried to block the reaction path through physical isolation means. Based on the idea of staged processing, it is considered to separate the flow process of molten plastic and the cooling process in space. By setting an independent cooling chamber, the plastic completes indirect cooling in a closed environment, avoiding direct contact between the material components and the cooling liquid. At the same time, a directional conveying mechanism needs to be designed to ensure the continuous transfer of the plastic from the extrusion end to the cooling end.

[0023] Please refer to Figures 1-12As shown, the present application is an environmentally friendly plastic granulating device for plastic processing, which comprises a main frame 1, a heating barrel 2, a barrel motor 3, a spiral material pipe 4, a granulator box 9 and a cutting mechanism 12. The heating barrel 2 is fixedly installed on the main frame 1, and a spiral extrusion rod is arranged inside. The outer wall of the spiral material pipe 4 is fixedly installed with a feeding motor 6 for driving the feeding screw rod 7 to rotate. The spiral material pipe 4 is connected to the heating barrel 2 and is equipped with the feeding screw rod 7 and the feeding hopper 5. The granulator box 9 is internally partitioned into a flow guide cavity 91 and a cooling cavity 92. The cooling mechanism 11 is arranged in the cooling cavity 92, and the flow guide mechanism 10 is arranged in the flow guide cavity 91. The cutting mechanism 12 is installed outside the granulator box 9 to complete the granulation.

[0024] The main frame 1 is a support frame that carries the main body of the device and provides an installation reference for the heating barrel 2 and the granulator box 9. The heating barrel 2 is a cylindrical container for plastic melting and extrusion, which realizes uniform melting and controllable extrusion of the plastic. The spiral material pipe 4 is a spiral conveying device for conveying plastic raw materials, which can be realized by a metal pipe body with spiral blades cooperating with a motor drive, forming a closed feeding channel to prevent the raw materials from escaping. The granulator box 9 is a split box body that contains cooling and flow guiding functions, which can be realized by a double-layer steel plate welding structure, and the flow guide cavity 91 and the cooling cavity 92 are physically isolated by a partition 94. The flow guide mechanism 10 is a conveying assembly connecting the extrusion end and the cooling end, which can be realized by a conduit cooperating with a lifting device to direct the molten plastic into the cooling cavity 92. The cooling mechanism 11 is a closed assembly for indirect cooling, which can be realized by a pipe structure with gradually changing hole diameters, and the heat is carried away by circulating cooling liquid. The cutting mechanism 12 is a mechanical assembly for completing the cutting of plastic, which can be realized by a cylinder driving cutter to granulate after cooling and hardening.

[0025] Specifically, the plastic raw materials are conveyed to the heating barrel 2 by the spiral material pipe 4 after melting, and a continuous rubber strip is formed by the spiral extrusion rod. The rubber strip enters the flow guide cavity 91 of the granulator box 9 through the flow guide mechanism 10 and completes the preliminary cooling in a closed environment. Then the rubber strip is guided into the cooling mechanism 11 in the cooling cavity 92, and heat exchange is carried out with the cooling liquid through the multi-stage cooling pipe with gradually changing hole diameters. The cooling liquid circulates outside the pipe, indirectly cools the rubber strip through the pipe wall, and avoids direct contact between the two. The hardened plastic strip is conveyed to the cutting mechanism 12 by the pushing mechanism, and the cutting is completed by the cutter. During the whole process, the physical isolation of the flow guide cavity 91 and the cooling cavity 92 blocks the contact path of the molten plastic and the cooling liquid.

[0026] Compared with the prior art, the traditional device adopts an open cooling tank to cause the material to be in direct contact with the cooling water, and the present scheme realizes the spatial isolation of the cooling process through the split granulator box 9. In the prior art, the direct flushing of the plastic strip by the cooling water can easily cause a chemical reaction, and the present scheme adopts an indirect cooling mode through a closed pipeline to eliminate the contact interface. The traditional structure cannot control the cooling contact area, and the present scheme realizes gradual cooling through a multi-stage aperture pipeline to avoid the performance degradation of the material caused by sudden temperature changes.

[0027] Through the above technical scheme, the present application effectively prevents the direct contact of the molten plastic with the cooling liquid, and blocks the precipitation path of components such as antimony catalyst. The closed cooling environment avoids the chemical reaction between the high-temperature plastic and the cooling medium, and reduces the generation amount of contaminated wastewater. The staged cooling process guarantees the forming quality of the plastic, while reducing the wastewater treatment cost. The synergistic effect of the flow guide mechanism 10 and the cooling mechanism 11 realizes continuous production, while guaranteeing the granulation efficiency and meeting the environmental protection requirements.

[0028] The present application further proposes that a material collecting hopper 8 is fixedly connected at the outlet of the heating cylinder 2, and a material collecting vertical sleeve 81 connected with the flow guide mechanism 10 is fixedly connected to the material collecting hopper 8.

[0029] The material collecting hopper 8 is a collecting container located at the outlet of the heating cylinder 2, which can be realized in a conical structure, and is used to receive and concentrate the molten plastic extruded from the spiral extrusion rod to prevent the plastic from scattering disorderly. The material collecting vertical sleeve 81 is a vertical sleeve fixedly connected with the material collecting hopper 8, which can be made of metal, and is used to direct the collected plastic to the flow guide mechanism 10 to form a closed material channel.

[0030] Specifically, the molten plastic is extruded from the heating cylinder 2 into the material collecting hopper 8, and forms a continuous conveying path through the connection of the material collecting vertical sleeve 81 and the flow guide mechanism 10. The conical structure of the material collecting hopper 8 guides the plastic to converge towards the material collecting vertical sleeve 81, and the vertical extension design of the material collecting vertical sleeve 81 ensures that the plastic remains in a closed state during the conveying process to avoid direct contact with the external cooling water. The reaction environment of the plastic and the cooling water is blocked through physical isolation to prevent the chemical change of the plastic components due to contact with the cooling water, and to avoid the precipitation of harmful substances to pollute the water body.

[0031] Compared with the prior art, the traditional granulation device directly introduces the molten plastic into the cooling water, causing the components of the plastic to react with the cooling water to generate pollutants, and the present scheme isolates the plastic from the cooling water through the closed conveying structure of the material collecting hopper 8 and the material collecting vertical sleeve 81 to reduce the reaction from the root and reduce the difficulty of wastewater treatment.

[0032] Through the above technical scheme, the present application solves the problem of component reaction caused by the direct contact of the molten plastic with the cooling water, avoids the precipitation of harmful substances to pollute the water body, and at the same time improves the plastic forming quality and reduces the wastewater treatment cost.

[0033] Referring to Figures 3-9 As shown in the drawings, the application further proposes a cooling mechanism 11 comprising cooling connection pipes 111 and a leak-proof shield 112. The cooling connection pipes 111 are arranged in multiple groups from top to bottom in the cooling cavity 92, and multiple pipes are arranged side by side in each group. The aperture of the cooling connection pipes 111 decreases from top to bottom. The leak-proof shield 112 is sleeved on the outer upper part of the cooling connection pipes 111, so that half of the outer periphery of the cooling connection pipes 111 is directly in contact with the cooling liquid.

[0034] Among them, the cooling connection pipe 111 refers to a tubular structure for guiding the flow of molten plastic and achieving gradient cooling, which can be implemented by a segmented stainless steel pipe group. The pipe diameters of different segments decrease in a stepped manner. This structure slows down the flow rate of plastic by gradually reducing the flow cross-sectional area, thereby avoiding the concentration of internal stress caused by sudden cooling. The leak-proof shield 112 refers to a protective component covering the upper half of the cooling connection pipe 111, which can be made of high-temperature-resistant rubber or polytetrafluoroethylene material in the form of a semi-cylindrical sheath. This shield limits the contact range of un-solidified plastic with the cooling liquid through physical isolation means, allowing only the lower half of the pipe wall to exchange heat with the cooling liquid, thereby reducing the risk of pollutant precipitation.

[0035] Specifically, after the molten plastic enters the cooling connection pipe 111, the plastic flow rate gradually decreases due to the gradual reduction of the pipe diameter during the flow from top to bottom. The gradient change in flow rate causes the outer layer of the plastic to first contact the pipe wall for preliminary cooling, and then enter the pipe with a smaller aperture after the formation of a solidified layer, thereby achieving layered solidification from the outside to the inside. The leak-proof shield 112 covers the upper half of the pipe, forming a sealed space to prevent un-solidified plastic from seeping out, while the lower half of the pipe wall is directly immersed in the cooling liquid, accelerating solidification through heat conduction. This structure controls the contact area and timing of the plastic with the cooling liquid, shortens the reaction time of the plastic with the cooling liquid to after the preliminary solidification of the outer layer, and effectively suppresses the precipitation of heavy metal components such as antimony.

[0036] Compared with the prior art, the traditional granulation device directly immerses high-temperature plastic in cooling water, causing continuous contact reaction between the plastic components and the water body. This scheme uses a gradient cooling structure with decreasing pipe diameters and a semi-enclosed shield design to form a solidification barrier on the outer layer of the plastic before full cooling, thereby avoiding defects caused by sudden cooling and significantly reducing the amount of pollutants generated by reducing the effective contact area and contact time.

[0037] Through the above technical solutions, the application solves the problem of component reaction caused by direct contact of high-temperature molten plastic with cooling water. By controlling the contact area and reducing the generation of harmful substances such as antimony, the application improves the cooling efficiency while reducing the difficulty of wastewater treatment and production cost.

[0038] Referring to Figures 5-9As shown, the application further proposes that the cooling mechanism 11 further comprises a plurality of groups of connecting shafts 113 arranged along the axial direction of the cooling connecting pipe 111 and rotatably mounted on the granulator box 9; a pushing roller 114 is fixedly mounted on the connecting shaft 113 and used for pushing the hardened plastic to the cutting mechanism 12 for cutting and granulating, and the side wall of the cooling connecting pipe 111 is provided with a avoiding hole 1111 for avoiding the pushing roller 114; a pushing motor 115 is fixedly mounted on the side wall of the cooling cavity 92 and used for driving the connecting shaft 113 to rotate; a belt pulley 116 is fixedly mounted on the side of the connecting shaft 113 away from the pushing motor 115, and a plurality of groups of belt pulleys 116 at the same height are connected by a transmission belt 117.

[0039] Among them, the connecting shaft 113 refers to the rotating part extending along the axial direction of the cooling connecting pipe 111, which can be realized by a stainless steel shaft body, used for bearing the pushing roller 114 and transmitting power. The pushing roller 114 refers to the protruding structure fixed on the surface of the connecting shaft 113, which can be realized by a spiral blade or a tooth-shaped protrusion, used for contacting and pushing the hardened plastic to move. The avoiding hole 1111 refers to the opening in the side wall of the cooling connecting pipe 111, which can be realized by a rectangular or arc-shaped hole structure, used for providing movement space for the pushing roller 114 to avoid interference. The pushing motor 115 refers to the power device driving the connecting shaft 113 to rotate, which can be realized by a servo motor or a stepping motor, used for providing stable speed control. The belt pulley 116 and the transmission belt 117 refer to the transmission assembly connecting the same height of the plurality of groups of connecting shafts 113, which can be realized by a synchronous belt pulley and a synchronous belt structure, used for realizing the synchronous operation of the plurality of groups of pushing rollers 114.

[0040] Specifically, during the conveying process of the hardened plastic inside the cooling connecting pipe 111, the pushing motor 115 drives the connecting shaft 113 to rotate, driving the pushing roller 114 to periodically pass through the avoiding hole 1111 and enter the inside of the cooling connecting pipe 111. After the pushing roller 114 contacts with the hardened plastic, the pushing roller 114 pushes the plastic to the downstream cutting mechanism 12 along the axial direction of the cooling connecting pipe 111 through the pushing force generated by rotation. The same height of the plurality of groups of connecting shafts 113 are linked through the belt pulley 116 and the transmission belt 117, ensuring that the pushing actions of the plurality of groups of pushing rollers 114 are synchronized. In this process, the pushing roller 114 only enters the inside of the cooling connecting pipe 111 during the pushing stage, and remains outside the avoiding hole 1111 at other times to avoid friction with the pipe wall. By replacing the traditional hydraulic conveying with mechanical pushing, the contact time of the plastic with the cooling water is reduced.

[0041] Compared with the prior art, the traditional granulating device relies on water flow to move the plastic, causing the plastic to soak in the cooling water for a long time, and the risk of harmful substances precipitating is high. The scheme adopts a mechanical pushing mode, which pushes through the intermittent contact of the pushing roller 114, ensuring the continuous conveying of the plastic and shortening the contact time of the plastic with the cooling water. At the same time, the synchronous operation of multiple sets of pushing rollers 114 avoids the accumulation and blockage of the plastic in the cooling connecting pipe 111, improving the conveying efficiency.

[0042] Through the above technical scheme, the application realizes mechanical continuous conveying of the hardened plastic during the cooling process, reduces the direct contact time of the plastic with the cooling water, and effectively reduces the risk of harmful substances precipitating into the cooling liquid. The cooperation design of the pushing roller 114 and the avoidance hole 1111 avoids the interference and wear of the mechanical structure and the pipe wall, and the synchronous driving of multiple sets of pushing rollers 114 ensures the stability of the conveying process, solving the pollution and wastewater problem caused by traditional water conveying.

[0043] Please refer to Figures 3-9 As shown in the figure, the application further proposes a flow guide mechanism 10 including a discharge conduit 101, a lifting guide sleeve 102 and a sliding conduit 103. The discharge conduit 101 is fixedly arranged in the material collecting hopper 8 and the granulator box 9, and is used for guiding the extruded rubber strip; the lifting guide sleeve 102 is slidably arranged on the outer periphery of the material collecting vertical sleeve 81, and the inside is fixedly provided with sliding conduits 103 equal in number to the discharge conduit 101; one end of the sliding conduit 103 is slidably connected in the discharge conduit 101, and the other end is connected in communication with the cooling mechanism 11, and the sliding conduit 103 is provided with an inlet chamfer 1031 at the entrance inside the discharge conduit 101.

[0044] Among them, the discharge conduit 101 refers to a tubular structure for concentrating and guiding the flow of molten plastic, which can be made of high-temperature-resistant alloy material, and the inner wall can be provided with a smooth coating to reduce the flow resistance. The structure avoids disordered diffusion of the plastic through directional flow guidance, reducing the contact area with the cooling water. Among them, the lifting guide sleeve 102 refers to a sleeve assembly that can slide axially along the material collecting vertical sleeve 81, which can be adjusted in height by a hydraulic or electric drive device, and the inside is integrated with sliding conduits 103 matching the number of discharge conduits 101. The structure adjusts the height to adapt to the aperture of different cooling connecting pipes 111, and realizes precise butt joint. Among them, the sliding conduit 103 refers to a transition pipe that can move with the lifting guide sleeve 102 and is dynamically connected with the discharge conduit 101, and the inlet chamfer 1031 at the entrance is designed as a 30-45 degree bevel. The structure compensates for thermal expansion and contraction deformation through dynamic sealing connection, and the chamfer design prevents the plastic from accumulating at the interface.

[0045] Specifically, the molten plastic is concentrated and drained through the discharge conduit 101, and then enters the cooling mechanism 11 through the sliding conduit 103 of the lifting guide sleeve 102. The lifting guide sleeve 102 adjusts the height according to the aperture size of the cooling connection pipe 111, so that the outlet of the sliding conduit 103 is in sealed butt joint with the cooling connection pipe 111 of the corresponding aperture size. The dynamic connection of the sliding conduit 103 and the discharge conduit 101 allows the deformation caused by temperature changes during equipment operation, and the feed chamfer 1031 guides the smooth entry of the plastic into the sliding conduit 103, avoiding stagnation or blockage at the interface due to changes in flow rate. Through layered directional flow guiding, the molten plastic forms a stable flow state before entering the cooling mechanism 11, reducing the direct contact area and reaction time with the cooling water.

[0046] Compared with the prior art, the conventional granulation device directly introduces high-temperature plastic into cooling water, causing a violent reaction between the plastic components and the cooling water. The present scheme establishes a staged cooling path through the flow guiding mechanism 10, so that the plastic completes preliminary morphology stabilization before entering the cooling mechanism 11, reducing the severity of contact between the molten plastic and the cooling water. The fixed flow guide pipe in the prior art cannot adapt to cooling pipes of different apertures, while the combination structure of the lifting guide sleeve 102 and the sliding conduit 103 in the present scheme achieves dynamic adjustment, solving the problem of adapting to cooling pipes of different specifications.

[0047] Through the above technical scheme, the present application effectively reduces the direct contact area between the molten plastic and the cooling water, suppresses the precipitation of harmful substances, and avoids water pollution. At the same time, the feed chamfer 1031 and the dynamic connection structure prevent pipe blockage, improving the stability of plastic flow and ensuring the quality of particle formation. The flow guiding mechanism 10 can reduce pollutant emissions without additional wastewater treatment equipment, solving the problem of high environmental protection cost in traditional processes.

[0048] Please refer to Figures 3-9 As shown in the drawings, the present application further proposes that the flow guiding mechanism 10 further comprises a cylinder seat plate 105 fixedly installed on the upper end of the partition plate 94, and a flow guiding cylinder 106 vertically and oppositely fixedly installed on the cylinder seat plate 105, the output end of the flow guiding cylinder 106 being fixedly connected to the lifting guide sleeve 102, for driving the lifting guide sleeve 102 to move up and down to butt joint with cooling mechanisms 11 of different sizes.

[0049] The cylinder seat plate 105 is a fixed base for bearing the flow guide cylinder 106, which can be fixed on the upper end of the partition plate 94 by welding or bolt connection, and provides a stable installation base for the flow guide cylinder 106. The flow guide cylinder 106 is a power element for driving the lifting guide sleeve 102 to move vertically, which can be realized by a double-acting hydraulic cylinder or an electric push rod, and the symmetrical arrangement can ensure that the lifting guide sleeve 102 is balanced in force. The lifting guide sleeve 102 is a sleeve structure in sliding cooperation with the material collecting vertical sleeve 81, which can be a metal sleeve with a guide groove on the inner wall, and the sliding guide pipe 103 installed inside can adjust the height position with the lifting action.

[0050] Specifically, when the cooling connection pipe 111 with different diameters needs to be adapted, the flow guide cylinder 106 is started and pushes the lifting guide sleeve 102 to move vertically along the outer wall of the material collecting vertical sleeve 81. The lifting guide sleeve 102 drives the sliding guide pipe 103 to displace synchronously, so that the outlet end of the sliding guide pipe 103 is precisely connected with the inlet of the target cooling connection pipe 111. In this process, the material guide slide plate 104 slides along the vertical sliding groove 95 to maintain the vertical movement track of the lifting guide sleeve 102, and the funnel hole 941 provides a channel for the plastic to flow into the cooling mechanism 11. By adjusting the height position of the lifting guide sleeve 102, multiple groups of cooling connection pipes 111 with decreasing diameters from top to bottom can be matched, so that the molten plastic can always accurately enter the target cooling pipe through the sliding guide pipe 103.

[0051] Compared with the prior art, the traditional flow guide mechanism 10 adopts a fixed-height flow guide structure, which cannot adapt to cooling pipes of different sizes, and is prone to cause plastic overflow or cooling efficiency reduction. The height of the flow guide assembly can be adjusted by the cylinder drive in the present application, so that the flow guide mechanism 10 can dynamically match cooling pipes of different levels, and the adaptability problem caused by changes in equipment parameters is solved.

[0052] Through the above technical scheme, the present application realizes the multi-level dynamic connection of the flow guide mechanism 10 and the cooling mechanism 11, effectively avoids the problem that the contact area of the plastic strip with the cooling liquid increases due to the deviation of the flow guide position. The structure can accurately control the flow path of the molten plastic, reduce the amount of harmful substances precipitated into the cooling liquid, and reduce the risk of production interruption caused by poor flow guide.

[0053] Referring to Figures 5-8 As shown in the drawings, the present application further proposes that the end of the lifting guide sleeve 102 close to the partition plate 94 is fixedly connected with the material guide slide plate 104, the partition plate 94 is provided with a vertical sliding groove 95 in sliding cooperation with the material guide slide plate 104, and the partition plate 94 is provided with a funnel hole 941 for facilitating the flow of plastic at the connection position with the cooling mechanism 11.

[0054] Wherein, the material guide slide plate 104 refers to the plate-shaped guide component rigidly connected with the lifting guide sleeve 102, which can be specifically realized by using a metal plate with surface polishing treatment, and its width is gap-fitted with the vertical sliding groove 95. The component contacts the partition plate 94 to form a sliding sealing interface during lifting, preventing the plastic melt from leaking from the flow guide cavity 91 to the cooling cavity 92. Wherein, the vertical sliding groove 95 refers to a strip-shaped groove opened in the vertical direction of the partition plate 94, which can be specifically realized by machining a rectangular cross-section groove, and its depth is greater than the thickness of the material guide slide plate 104 to form a guide stroke. This structure restricts the lifting guide sleeve 102 to move only in the vertical direction, avoiding lateral deviation that causes the sliding guide pipe 103 to be misaligned with the cooling connection pipe 111. Wherein, the funnel hole 941 refers to a gradually expanding opening provided at the connection between the partition plate 94 and the cooling mechanism 11, which can be specifically realized by using a conical hole structure, and its inlet diameter matches the outlet of the sliding guide pipe 103, and the outlet diameter extends to the inlet area of the cooling connection pipe 111. This structure forms a converging channel for the transition of the plastic melt from the flow guide cavity 91 to the cooling cavity 92, reducing flow resistance.

[0055] Specifically, when the flow guide cylinder 106 drives the lifting guide sleeve 102 to move vertically, the material guide slide plate 104 slides along the vertical sliding groove 95, ensuring the straightness of the movement trajectory of the lifting guide sleeve 102. During the synchronous movement of the sliding guide pipe 103 with the lifting guide sleeve 102, its outlet is coaxially aligned with the cooling connection pipe 111 of different heights through the funnel hole 941. After the plastic melt flows out of the sliding guide pipe 103, it is guided by the conical inner wall of the funnel hole 941 and uniformly enters the inside of the cooling connection pipe 111. The sliding seal formed by the contact surface of the material guide slide plate 104 and the partition plate 94 effectively blocks the melt leakage between the flow guide cavity 91 and the cooling cavity 92. The gradually expanding structure of the funnel hole 941 naturally transitions the melt flow path, avoiding the formation of stagnation or turbulence in the partition plate 94 area.

[0056] Compared with the prior art, the conventional flow guide mechanism 10 is prone to lateral deviation when adjusting the docking height, causing misalignment of the guide pipe interface and melt leakage. The existing partition plate 94 usually adopts a straight hole structure, and the melt is prone to form vortex accumulation at the hole. The present scheme eliminates the lateral displacement deviation during lifting through the rigid guide cooperation of the material guide slide plate 104 and the vertical sliding groove 95, ensuring the docking accuracy of the guide pipe. The gradually expanding design of the funnel hole 941 optimizes the melt flow direction, allowing it to smoothly enter the cooling connection pipe 111, avoiding material stagnation caused by sudden changes in the flow path.

[0057] By the technical scheme, the application solves the leakage problem caused by the deviation of the plastic flow path during the lifting of the flow guide mechanism 10, and realizes the precise butt joint of the sliding guide pipe 103 and the cooling connecting pipe 111. The sliding seal between the material guide sliding plate 104 and the partition plate 94 effectively blocks the overflow of the melt, and the funnel hole 941 structure reduces the melt flow resistance, ensuring that the plastic continuously and stably enters the cooling mechanism 11. The scheme adapts to the switching requirements of cooling connecting pipes 111 of different sizes, and improves the multi-specification production capacity of the granulating device.

[0058] Please refer to Figures 8-12 As shown in the drawings, the application further proposes that the granulator box 9 is fixedly arranged with a cutting frame 93 away from one side of the flow guide mechanism 10, and the cutting frame 93 is vertically arranged with cutting sliding grooves 96 at both ends; the cutting mechanism 12 includes a cutting seat plate 121 fixedly installed at the middle part of the upper end of the cutting frame 93, and a cutting cylinder 122 vertically downwardly fixedly installed on the cutting seat plate 121; a lifting frame 123 is slidingly connected between the two groups of cutting sliding grooves 96, and a cylinder connecting plate 124 is fixedly installed on the lifting frame 123, and the cylinder connecting plate 124 is fixedly connected with the output end of the cutting cylinder 122; a cutting knife 128 is detachably installed on the lifting frame 123 by means of a countersunk screw 129, and is used for cutting and granulating the plastic strip.

[0059] Among them, the cutting sliding groove 96 refers to a guide rail extending in the vertical direction, which can be realized by using a rectangular steel rail in combination with a linear bearing to provide a stable linear motion track for the lifting frame 123. The cutting cylinder 122 refers to a power element for driving the lifting frame 123 to move, which can be realized by using a stroke-adjustable pneumatic actuator, and precise reciprocating motion is realized by air pressure control. The countersunk screw 129 refers to a fastener with a conical head, which can be realized by using an internal hexagonal countersunk bolt to keep the installation surface flat when fixing the cutting knife 128. The lifting frame 123 refers to a moving frame for carrying the cutting knife 128, which can be realized by splicing aluminum alloy profiles, which reduces the weight while ensuring the structural strength. The cutting knife seat plate 127 refers to a support plate for installing the cutting knife 128, which can be realized by machining a steel plate with a positioning groove to ensure the consistency of the knife blade installation position.

[0060] Specifically, when the cutting position needs to be adjusted, the cutting cylinder 122 drives the lifting frame 123 to move vertically along the cutting groove 96. The guide sliding blocks 126 on both sides of the lifting frame 123 form a sliding fit with the cutting groove 96, eliminating lateral deviation during movement. The cutting knife 128 is fixed on the cutting knife seat plate 127 by means of a countersunk screw 129. When the blade needs to be replaced, only the screw needs to be disassembled to complete the maintenance work. After the cutting knife 128 is installed, its vertical blade surface is flush with the end face of the cutting knife seat plate 127, ensuring uniform stress during cutting. When the lifting frame 123 descends, the cutting knife 128 implements synchronous cutting of the cooled and hardened plastic strip, and the cutting length is controlled by adjusting the cylinder stroke.

[0061] Compared with the prior art, the traditional granulating equipment adopts a fixed cutting knife 128 structure, which cannot adjust the cutting position according to the particle size, resulting in poor consistency of product particle size. In the prior art, the blade replacement requires the cutting mechanism to be disassembled as a whole, which is low in maintenance efficiency. The present scheme realizes stepless adjustment of the cutting height through the sliding connection of the lifting frame 123 and the adjustable cylinder; adopts a modular blade design, shortening the single maintenance time; and converts the cutting impact force into a vertical load through the guide sliding groove structure, reducing the vibration amplitude of the equipment.

[0062] Through the above technical scheme, the present application realizes accurate control of the vertical stroke of the cutting knife 128, which can adapt to the production needs of plastic particles of different particle size ranges. The detachable blade structure improves the single maintenance work efficiency. The cooperation of the guide sliding groove and the lifting frame 123 ensures that the flatness error of the cutting section is reduced. The present scheme effectively solves the problem of equipment adjustment when switching between products of different specifications, and avoids the loss caused by the shutdown of the whole machine due to tool wear.

[0063] Please refer to Figures 8-12 As shown in the drawings, the present application further comprises a plurality of guide sliding blocks 126 slidingly connected on both sides of the lifting frame 123, a cutting knife seat plate 127 for mounting the cutting knife 128 is fixedly connected between guide sliding blocks 126 of the same height, a plurality of adjusting bolts 125 are threadedly connected on the lifting frame 123, the positions and numbers of the adjusting bolts 125 correspond to the cutting knife seat plate 127, and the end portions of the adjusting bolts 125 are rotatably connected to the cutting knife seat plate 127. The relative position of the cutting knife seat plate 127 and the lifting frame 123 is adjusted by rotating the adjusting bolt 125, so as to adjust the distance between the cutting knife 128 and the outlet of the cooling mechanism 11.

[0064] The guide sliding block 126 refers to a linear moving component slidingly connected on both sides of the lifting frame 123, which can be implemented by a linear guide rail or a ball sliding block, and functions to provide the cutter seat plate 127 with a transverse moving degree of freedom while maintaining the stability of the moving track. The adjusting bolt 125 refers to a rod-shaped component with external threads, which can be implemented by a handwheel type bolt with scale markings, and functions to convert the rotary motion into linear displacement of the cutter seat plate 127 through the threaded pair, so as to realize accurate adjustment of the position of the cutting knife 128. The cutter seat plate 127 refers to a mounting base plate for fixing the cutting knife 128, which can be implemented by an aluminum alloy plate with dovetail grooves, and functions to detachably fix the cutting knife 128 through the countersunk head screw 129, and forms a rigid connection with the guide sliding block 126 to transmit the adjusting force. The inclined blade edge 1281 refers to the beveled edge on the side of the cutting knife 128 close to the cutter seat plate 127, which functions to form a progressive shear force distribution during cutting, thereby reducing the damage of the blade edge caused by instantaneous impact load.

[0065] Specifically, when it is necessary to adjust the cutting size of the plastic particles, the cutter seat plate 127 is driven to move transversely along the guide sliding block 126 by rotating the adjusting bolt 125, so as to change the distance between the cutting knife 128 and the outlet of the cooling mechanism 11. The adjustment range of the distance is related to the cooling shrinkage rate of the plastic strip after extrusion, for example, for a plastic strip with a diameter of 5 mm, the distance between the cutting knife 128 can be adjusted to the target position corresponding to the length of the particles. The cutting knife 128 is fixed on the cutter seat plate 127 by the countersunk head screw 129, and when it is necessary to replace the cutting knife of different specifications, the screw can be detached and replaced with a cutting knife 128 with a corresponding blade size. The inclined blade edge 1281 forms an angle contact with the plastic strip during cutting, and the vertical blade surface ensures that the end surface of the cut particles is flat.

[0066] Compared with the prior art, the position of the cutting knife 128 of the traditional granulating device is fixed, and only the particle size can be changed by replacing the mold. However, the present scheme realizes continuous adjustment of the position of the cutting knife 128 through the cooperation of the adjusting bolt 125 and the guide sliding block 126, so that different particle size requirements can be met without stopping to replace the mold. The fixed distance between the cutting knife 128 and the cooling outlet in the prior art is easy to cause the plastic strip that has not been fully hardened to be stretched and deformed, while the distance adjustment function of the present scheme can match the cooling shrinkage process of the plastic strip, so as to ensure that the material is in a fully hardened state during cutting.

[0067] Through the above technical scheme, the present application solves the problem that the existing granulating device cannot flexibly adjust the position of the cutting knife 128, and realizes rapid adaptive cutting of plastic particles with different particle sizes. The detachable design of the cutting knife 128 reduces the maintenance cost, the combination of the inclined blade edge 1281 and the vertical blade surface improves the cutting efficiency and the quality of the cross section, and the precise control function of the adjusting bolt 125 avoids the position error caused by manual adjustment, thereby ensuring the consistency of the particle size.

[0068] Referring to Figures 8-12 As shown in the drawings, the application further proposes that the cutter seat plate 127 is provided with a cutter groove 1271 for mounting the cutting knife 128 at the lower part of the end away from the adjusting bolt 125, the upper thickness of the cutting knife 128 is equal to the depth of the cutter groove 1271, the cutting knife 128 is provided with an inclined blade 1281 at the lower part of the side close to the cutter seat plate 127, the side away from the cutter seat plate 127 of the cutting knife 128 is a vertical blade surface, the cutting knife 128 is provided with a countersunk hole for mounting the countersunk screw 129, and the vertical blade surface of the cutting knife 128 is flush with the end surface of the cutter seat plate 127 after being fixed and installed.

[0069] The cutter groove 1271 refers to a groove structure provided below the end of the cutter seat plate 127, which can be realized by milling to form a rectangular groove, and is used to limit the installation position of the cutting knife 128. The depth of the cutter groove 1271 is equal to the upper thickness of the cutting knife 128, so that the top of the cutting knife 128 is flush with the surface of the cutter seat plate 127 after being embedded. The inclined blade 1281 refers to a bevel structure formed at the lower part of the side close to the cutter seat plate 127 of the cutting knife 128, which can be realized by grinding at an angle of 30-45 degrees, and is used to reduce the cutting resistance. The vertical blade surface refers to a vertical plane formed at the side away from the cutter seat plate 127 of the cutting knife 128, which can be realized by plane grinding process, and maintains a coplanar state with the end surface of the cutter seat plate 127. The countersunk hole refers to a tapered through hole provided at the top of the cutting knife 128, which can be realized by drilling and matching with a countersunk drill, and is used to mount the countersunk screw 129 to fix the cutting knife 128.

[0070] Specifically, the cutting knife 128 is fixed in the cutter groove 1271 by the countersunk screw 129, and the upper thickness thereof is matched with the depth of the cutter groove 1271 to realize vertical positioning. After being installed, the vertical blade surface of the cutting knife 128 is in the same plane with the end surface of the cutter seat plate 127, forming a continuous cutting reference surface. The inclined blade 1281 preferentially contacts the plastic strip during cutting, and reduces the cutting resistance through the oblique force. When the cutting cylinder 122 drives the lifting frame 123 to press down, the vertical blade surface and the end surface of the cutter seat plate 127 jointly form a shearing force to cut the plastic strip into particles. The cutting knife 128 can be replaced individually by disassembling the countersunk screw 129 after being worn, without the need to replace the whole cutter seat plate 127.

[0071] Compared with the prior art, the traditional cutting tool adopts a single-sided flat blade directly fixed to the tool holder, and there is a problem of uneven cutting surface caused by misalignment of the blade and the tool holder mating surface. The scheme ensures that the cutting surface forms a complete reference plane through the matching design of the depth of the cutter slot 1271 and the thickness of the cutting knife 128, combined with the coplanar cooperation of the vertical blade surface and the end surface of the cutter seat plate 127. The combination structure of the inclined blade 1281 and the vertical blade surface effectively reduces the cutting resistance and material adhesion compared with the single blade form.

[0072] Through the above technical scheme, the present application realizes the accurate positioning installation of the cutting knife 128, avoids the particle size deviation caused by the tool deviation during the cutting process. The combination structure of the inclined blade 1281 and the vertical blade surface reduces the cutting resistance and plastic debris residue, the coplanar cooperation of the vertical blade surface and the cutter seat plate 127 ensures the flatness of the cutting surface, and the installation mode of the countersunk screw 129 improves the tool replacement efficiency, so as to improve the cutting precision and reduce the risk of plastic pollution.

[0073] The above describes one embodiment of the present application in detail, but the content described is only the preferred embodiment of the present application, and cannot be considered as limiting the scope of the present application. Any equivalent changes and improvements made within the scope of the present application should still belong to the scope of the present patent.

Claims

1. An environmentally friendly plastic granulation device for plastic processing, characterized in that, include: The main frame (1) serves as the main support; Heating cylinder (2), which is fixedly installed on the main frame (1), is used to melt and extrude plastic, and is equipped with a spiral extrusion rod inside; The barrel motor (3) is fixedly installed on the heating barrel (2) and is used to drive the spiral extrusion rod to extrude the molten plastic; The spiral tube (4) is fixedly installed above the heating cylinder (2). Its outlet is connected to the inlet of the heating cylinder (2) through a flange. A funnel-shaped feed hopper (5) is connected to its inlet. A feeding spiral rod (7) is rotatably installed inside the spiral tube (4). A feeding motor (6) for driving the feeding spiral rod (7) to rotate is fixedly installed on the outer wall of the spiral tube (4). The granulator housing (9) is arranged side by side with the main frame (1) on the ground. Its interior is divided into a flow guide chamber (91) and a cooling chamber (92) by a partition (94). The cooling chamber (92) is filled with coolant and a cooling mechanism (11) for cooling plastic is installed in the cooling chamber (92). A flow guide mechanism (10) for guiding plastic from the outlet of the heating cylinder (2) into the cooling mechanism (11) is installed in the flow guide chamber (91). The cutting mechanism (12), which is installed on the side of the granulator housing (9) away from the main frame (1), is used to cut and granulate plastic.

2. The environmentally friendly plastic granulation device for plastic processing according to claim 1, characterized in that, A material collection hopper (8) is fixedly connected to the outlet of the heating cylinder (2), and a material collection vertical sleeve (81) connected to the flow guiding mechanism (10) is fixedly connected to the material collection hopper (8).

3. The environmentally friendly plastic granulation device for plastic processing according to claim 1, characterized in that, The cooling mechanism (11) includes: The cooling connecting pipe (111) is arranged in multiple sets from top to bottom in the cooling chamber (92), and each set has multiple sets arranged side by side, and the diameter of the cooling connecting pipe (111) decreases from top to bottom. The leak-proof cover (112) is fitted on the upper part of the outside of the cooling connecting pipe (111) and makes half of the outer periphery of the cooling connecting pipe (111) directly contact the coolant, thereby improving the cooling and curing efficiency of the plastic.

4. The environmentally friendly plastic granulation device for plastic processing according to claim 3, characterized in that, The cooling mechanism (11) further includes: Multiple sets of connecting shafts (113) are arranged along the axial direction of the cooling connecting pipe (111) and are rotatably mounted on the granulator housing (9); The pusher roller (114) is fixedly mounted on the connecting shaft (113) and is used to push the hardened plastic to the cutting mechanism (12) for cutting and granulation. The cooling connecting pipe (111) has a clearance hole (1111) on its side wall to avoid the pusher roller (114). The pusher motor (115) is fixedly installed on the side wall of the cooling chamber (92) and is used to drive the connecting shaft (113) to rotate; The pulley (116) is fixedly installed on the side of the connecting shaft (113) away from the pusher motor (115), and multiple pulleys (116) at the same height are connected by a transmission belt (117).

5. The environmentally friendly plastic granulation device for plastic processing according to claim 2, characterized in that, The flow guiding mechanism (10) includes: The discharge conduit (101) is fixedly installed in the collection hopper (8) and the granulator box (9) to guide the extruded rubber strips; The lifting guide sleeve (102) is slidably sleeved on the outer periphery of the collecting vertical sleeve (81), and is fixedly provided with a number of sliding guide tubes (103) equal to the number of discharge guide tubes (101). The sliding conduit (103) has one end slidably connected to the discharge conduit (101) and the other end connected to the cooling mechanism (11) for guiding plastic into the cooling mechanism (11). The sliding conduit (103) is provided with a feed chamfer (1031) at the inlet of the discharge conduit (101).

6. The environmentally friendly plastic granulation device for plastic processing according to claim 5, characterized in that, The flow guiding mechanism (10) further includes: Cylinder seat plate (105), which is fixedly installed on the upper end of partition plate (94); A guide cylinder (106) is fixedly mounted on a cylinder seat plate (105) with its values ​​facing each other, and the output end of the guide cylinder (106) is fixedly connected to the lifting guide sleeve (102) to drive the lifting guide sleeve (102) to move up and down to connect with cooling mechanisms (11) of different sizes.

7. The environmentally friendly plastic granulation device for plastic processing according to claim 6, characterized in that, The lifting guide sleeve (102) is fixedly connected to the end near the partition (94) with a material guide slide plate (104). The partition plate (94) is provided with a vertical slide groove (95) that slides with the material guide slide plate (104). The partition plate (94) is provided with a funnel hole (941) that facilitates the flow of plastic at the connection point with the cooling mechanism (11).

8. The environmentally friendly plastic granulation device for plastic processing according to claim 1, characterized in that, A cutting frame (93) is fixedly installed on the side of the granulator box (9) away from the flow guiding mechanism (10), and a cutting groove (96) is provided at both ends of the cutting frame (93). The cutting mechanism (12) includes: A cutting seat plate (121) is fixedly installed at the middle of the upper end of the cutting frame (93), and a vertically downward cutting cylinder (122) is fixedly installed on the cutting seat plate (121). The lifting frame (123) is slidably connected between two sets of cutting grooves (96), and a cylinder connecting plate (124) is fixedly installed on the lifting frame (123). The cylinder connecting plate (124) is fixedly connected to the output end of the cutting cylinder (122). A cutting blade (128), which is detachably mounted on a lifting frame (123) by a countersunk screw (129), is used to cut and granulate plastic strips.

9. The environmentally friendly plastic granulation device for plastic processing according to claim 8, characterized in that, Multiple sets of guide sliders (126) are slidably connected on both sides of the lifting frame (123). A cutter seat plate (127) for installing the cutter (128) is fixedly connected between the guide sliders (126) of the same height. Multiple sets of adjusting bolts (125) are threaded through the lifting frame (123). The position and number of the adjusting bolts (125) correspond to the cutter seat plate (127). The end of the adjusting bolt (125) is rotatably connected to the cutter seat plate (127).

10. The environmentally friendly plastic granulation device for plastic processing according to claim 9, characterized in that, The lower part of the cutter base plate (127) away from the adjusting bolt (125) is provided with a cutter groove (1271) for installing the cutter (128). The upper thickness of the cutter (128) is equal to the depth of the cutter groove (1271). The lower part of the cutter (128) near the cutter base plate (127) is provided with an inclined blade (1281). The side of the cutter (128) away from the cutter base plate (127) is a vertical blade surface.

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