Plastic extrusion granulation device

Abstract

The invention relates to the technical field of granulation equipment, and particularly discloses a plastic extrusion granulation device which comprises an extruder, a cooling mechanism and a granulator, the cooling mechanism comprises a first water tank, a second water tank arranged above the first water tank and a driving assembly, and the left end and the right end of the second water tank communicate with the first water tank through water pumps correspondingly; water outlet holes are respectively formed in the left and right ends of the water tank II; when the driving assembly drives the left end of the second water tank to swing upwards and the right end of the second water tank to swing downwards, the water pump connected with the left end of the second water tank pumps the cooling water in the first water tank into the second water tank, and when the driving assembly drives the right end of the second water tank to swing upwards and the left end of the second water tank to swing downwards, the water pump connected with the right end of the second water tank pumps the cooling water in the first water tank into the second water tank. According to the plastic extruding and granulating device, strip-shaped plastic can be uniformly cooled in the traction process, and the problem that plastic particles are inconsistent in quality or irregular in shape due to temperature difference is solved.

Description

Technical Field

[0001] The invention relates to the technical field of granulation equipment, and in particular to a plastic extrusion granulation device. Background Art

[0002] Plastic extrusion granulation device is an important equipment in the plastic processing industry. It is mainly used to make plastic products in granular form by melting, extruding, cooling, cutting and other processes of plastic raw materials. During the production process, after the molten plastic raw materials enter the extruder, they will be extruded by the extruder to form strips of plastic. The strips of plastic fall into the water tank and are cooled by the cooling water in the water tank to reduce the temperature of the plastic strips and prevent adhesion. At the same time, the cooled plastic strips are easier to be cut into uniform small particles to ensure the quality and consistency of the finished particles.

[0003] After a period of use, the temperature of cooling water will increase and the cooling effect will decrease. Therefore, it is necessary to add new cooling water to the water tank to adjust the temperature and replenish the cooling water in the water tank. However, after adding new cooling water, the temperature in the water tank may drop sharply, causing the strip plastic to become too hard and easily break when pulling the strip plastic.

[0004] The Chinese patent with the announcement number CN115742080B discloses a plastic granulator with an automatic sorting device, including a base, an extruder, a head and a granulator, wherein the extruder and the granulator are respectively mounted on the left and right ends of the upper surface of the base, and the head is mounted on the extrusion end of the extruder, and also includes a cooling mechanism, wherein the cooling mechanism includes a water tank, a controller, a solenoid valve, a heater, a lifting component and a temperature sensor. When the water temperature in the water tank is too low, the patent lifts the strip plastic by the lifting component to reduce the contact area between the strip plastic and the cooling water, so as to prevent the strip plastic from being overcooled and easily broken.

[0005] However, when adding new cooling water to the water tank in the above patent, the adding position is fixed, the water temperature in the water tank varies, and the cooling of the strip plastic is uneven, which can easily cause local overheating or local overcooling of the strip plastic, making the quality of the manufactured plastic particles inconsistent or irregular in shape.

[0006] Therefore, the art needs a plastic extrusion granulation device to solve the above problems. Summary of the invention

[0007] The present invention provides a plastic extrusion granulation device, aiming to solve the problem in the related art that after adding new cooling water, the water temperature in the water tank of the granulation device varies greatly, which easily causes uneven cooling of strip plastics and affects the molding quality of plastic particles.

[0008] A plastic extrusion granulation device of the present invention comprises an extruder, a cooling mechanism and a granulator, wherein the strip-shaped plastic extruded by the extruder passes through the cooling mechanism from right to left, wherein the cooling mechanism comprises a water tank 1, a water tank 2 arranged above the water tank 1, and a driving assembly for driving the left and right ends of the water tank 2 to swing up and down, wherein the left and right ends of the water tank 2 are respectively connected to the water tank 1 through a water pump, and the left and right ends of the water tank 2 are respectively provided with water outlet holes; When the driving component drives the left end of water tank two to swing upward and the right end to swing downward, the water pump connected to the left end of water tank two pumps the cooling water in water tank one into water tank two. When the driving component drives the right end of water tank two to swing upward and the left end to swing downward, the water pump connected to the right end of water tank two pumps the cooling water in water tank one into water tank two.

[0009] The present invention provides two water tanks. When new cooling water needs to be added, the cooling water is first added to the first water tank, mixed with the original cooling water in the first water tank for the first time, and then pumped into the second water tank by a water pump to mix with the cooling water in the second water tank for the second time. This can avoid the problem of the strip plastic breaking due to overcooling caused by the sudden drop of the water temperature in the second water tank after the new cooling water is added. Moreover, the left and right ends of the second water tank are driven by the driving component to swing up and down, so that the cooling water pumped into the second water tank can be quickly mixed with the original cooling water, and the temperature gradient of the water temperature in the second water tank can be reduced, so that the strip plastic can be cooled more evenly during the traction process, and the problem of inconsistent quality or irregular shape of plastic particles caused by temperature differences can be improved. In addition, the cooling water flows left and right in the second water tank, which can effectively exchange heat with the strip plastic, take away heat, and cool it quickly, thereby improving the cooling efficiency while ensuring the cooling effect.

[0010] Preferably, the water tank two is rotatably connected to the water tank one, and the driving assembly includes an automatic telescopic rod arranged on the left and right sides of the rotational connection between the water tank two and the water tank one, the automatic telescopic rod is fixedly installed on the water tank one, and the driving end of the automatic telescopic rod is connected to the water tank two through a connecting piece.

[0011] Preferably, filter components are respectively arranged near the left and right ends in the second water tank, a recoil component is arranged on the filter component, a sewage outlet is opened on the second water tank, and the recoil component recoils the impurities filtered by the filter component into the sewage outlet.

[0012] When the cooling water in the second water tank is discharged, the cooling water will pass through the filter component, the filter component will remove impurities in the cooling water, and then the recoil component will recoil the impurities attached to the filter component to the drain port for discharge, thereby filtering and purifying the cooling water, avoiding impurities mixed in the cooling water to reduce the heat conduction efficiency of the cooling water, and impurities attached to the strip plastic, which will be brought into the subsequent cutting, screening and packaging processes to pollute the final product, thereby ensuring a good heat exchange effect between the cooling water and the strip plastic.

[0013] Preferably, the filter assembly includes a filter plate fixedly connected to the water tank two, and the filter plate is provided with filter holes and water inlet holes. When the water pump pumps water into the water tank two, cooling water enters the water tank two through the water inlet holes. When the left end or the right end of the water tank two swings downward, the cooling water in the water tank two is filtered by the filter plate at the corresponding end and then discharged from the water outlet hole into the water tank one.

[0014] Preferably, the two filter plates in the second water tank are respectively provided with stop plates on one side facing each other, the stop plates are slidably connected to the second water tank along the vertical direction and fit onto the corresponding filter plates, a limiting structure is provided between the stop plate and the second water tank, the connecting piece is rotatably connected to the corresponding driving end of the automatic telescopic rod, and the connecting piece is slidably connected to the stop plate along the left and right direction, and when the automatic telescopic rod drives the stop plate to move upward through the connecting piece until the limiting structure acts, the stop plate drives one end of the second water tank to swing upward, and the stop plate covers the filter holes on the filter plate.

[0015] When one of the left and right ends of water tank two is at the lowest position, the stop plate corresponding to this end is located below the filter hole on the filter plate to avoid blocking the filter hole and block the water inlet hole on the filter plate to ensure that the cooling water flows out of the filter hole smoothly, thereby achieving filtration of the cooling water; and when water is entering this end, the stop plate blocks the filter hole and exposes the water inlet hole, so that the cooling water in water tank one is pumped in from the water inlet hole to prevent impurities on the filter hole from entering water tank two along with the cooling water.

[0016] Preferably, a recoil cavity is opened on one side of the stop plate facing the corresponding filter plate, and a pushing structure is arranged between the stop plate and the filter plate, when the stop plate moves upward along the filter plate, the pushing structure pushes the stop plate to move in a direction away from the filter plate, when the limiting structure acts, the pushing structure pulls the stop plate to fit onto the filter plate, the filter hole is located in the recoil cavity, and the recoil cavity is connected to the sewage outlet.

[0017] When the stop plate moves upward relative to the filter plate, the push structure will push the stop plate away from the filter plate, which can effectively prevent the stop plate from scraping impurities attached to the filter plate to the upper part during the rising process. This design helps the recoil chamber to better cover the filtered impurities, making it easier to recoil and centrally process the impurities.

[0018] Preferably, the recoil assembly comprises an installation box body with an opening at the top and a movable plug vertically slidably connected to the installation box body, the installation box body is located on the side of the two filter plates facing away from each other, the installation box body is provided with a recoil hole corresponding to the filter hole and a water through hole corresponding to the water outlet hole, the movable plug is provided with a leakage hole, and the movable plug is connected to a driving member, and the installation box body is connected to the stop plate; water in the second water tank enters the installation box body from the leakage hole after being filtered by the filter plate, and enters the water outlet hole from the water through hole to be discharged, when the stop plate drives the installation box body to move upward, the groove wall of the second water tank blocks the water through hole, and cooling water remains in the installation box body, when the limiting structure acts, the recoil hole is aligned with the filter hole, and the driving member drives the movable plug to move downward, squeezing the water in the installation box body to recoil the filter hole.

[0019] Preferably, a plurality of water storage chambers are provided in the installation box body at intervals along the front-to-back direction, the movable plug is slidably arranged in the corresponding water storage chamber along the up-down direction, and the bottom of the movable plug is elastically connected to the installation box body, and a one-way valve is provided at the leakage hole, and the one-way valve allows cooling water to enter the water storage chamber from the leakage hole.

[0020] By setting a one-way valve, when the driving member drives the movable plug to move downward along the water storage chamber, the cooling water in the water storage chamber will not overflow from the leakage hole, thereby ensuring that the cooling water effectively recoils the filter hole.

[0021] Preferably, the installation box body and the stop plate are connected through a portal frame, and the portal frame is slidably connected to the installation box body and the stop plate respectively along the front-to-back direction, and an extrusion block is provided at the bottom of the portal frame, and the driving member includes a motor and a lead screw, and the motor is fixedly mounted on the water tank two, the lead screw is rotatably connected to the water tank two and is transmission connected to the output end of the motor, and a movable block is vertically slidably connected on the portal frame, and the movable block is threadably matched with the lead screw, and inclined surfaces are respectively provided on the front and rear sides of the movable plug, and the motor drives the lead screw to drive the movable block to move along the front-to-back direction, and the movable block drives the portal frame and the extrusion block to move along the front-to-back direction, and the extrusion block drives the movable plug to move downward by extruding the inclined surface.

[0022] Preferably, the door-type frame includes a frame body 1 and a frame body 2 which are elastically connected, the frame body 1 being slidably connected to the stop plate, and the frame body 2 being slidably connected to the installation box body, the pushing structure including a pushing block fixedly installed on the filter plate, the upper and lower ends of the pushing block being respectively provided with inclined wedge surfaces, and the stop plate being provided with a pushing groove adapted to the pushing block, when the stop plate moves upward, the inclined wedge surface located at the lower end squeezes the groove surface of the pushing groove, so that the stop plate moves in a direction away from the filter plate, and when the filter plate passes over the pushing block, the frame body 1 drives the stop plate to fit against the filter plate, the recoil chamber cover is provided on the filter hole, and a brush is provided on the side of the frame body 1 facing the filter plate.

[0023] The beneficial effects of the present invention are as follows: the present invention provides two water tanks, and when new cooling water needs to be added, the cooling water is first added to the first water tank, and mixed with the original cooling water in the first water tank for the first time, and then pumped into the second water tank by a water pump, and mixed with the cooling water in the second water tank for the second time, which can avoid the problem of the strip plastic breaking due to excessive cooling caused by the sudden drop of the water temperature in the second water tank after the new cooling water is added; Moreover, by driving the left and right ends of the second water tank to swing up and down through the driving component, the cooling water pumped into the second water tank can be quickly mixed with the original cooling water, reducing the temperature gradient of the water temperature in the second water tank, so that the strip plastic can be cooled more evenly during the traction process, improving the problem of inconsistent quality or irregular shape of plastic particles caused by temperature differences; In addition, the cooling water flows left and right in the second water tank, which can effectively exchange heat with the strip plastic, take away the heat, and cool it down quickly, thereby ensuring the cooling effect and improving the cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a front view of a plastic extrusion granulation device of the present invention.

[0025] Figure 2 It is a schematic diagram of a cooling mechanism of a plastic extrusion granulation device of the present invention.

[0026] Figure 3 It is a schematic diagram of a filter plate at the left end of a water tank 2 of a plastic extrusion granulation device of the present invention.

[0027] Figure 4 The present invention is a schematic diagram of the positions of a stop plate and a filter plate at the right end of a water tank 2 of a plastic extrusion granulation device.

[0028] Figure 5 The utility model is a schematic diagram of an exploded view of a stop plate and a connecting piece of a plastic extrusion granulation device of the present invention.

[0029] Figure 6The present invention is a top view of a stop plate and a recoil assembly of a plastic extrusion granulation device.

[0030] Figure 7 yes Figure 6 Cross-sectional view of the middle section AA.

[0031] Figure 8 It is a cross-sectional view of a recoil component of a plastic extrusion granulation device of the present invention.

[0032] Fig. 9 The present invention is a schematic diagram of the positions of a stop plate and a filter plate at the left end of a water tank 2 of a plastic extrusion granulation device.

[0033] Reference numerals: 1. Extruder; 2. Sink 1; 3. Sink 2; 31. Water outlet; 32. Support rod; 33. Automatic telescopic rod; 34. Drain port; 35. Slide; 4. Water pump; 5. Connector; 51. Inverted T-block; 6. Filter plate; 61. Filter hole; 62. Water inlet; 63. Push block; 64. Wedge surface; 7. Stop plate; 71. Inverted T-slot; 72. Recoil chamber; 73. Push slot; 8. Mounting box; 81. Movable plug; 82. Water storage chamber; 83. Spring 1; 84. Recoil hole; 85. Water hole; 86. Leakage hole; 87. Inclined surface; 9. Door frame; 91. Frame 1; 92. Frame 2; 93. Extrusion block; 94. Movable block; 10. Motor; 101. Screw. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0035] like Figures 1 to 9 As shown, a plastic extrusion granulation device of the present invention comprises an extruder 1, a cooling mechanism and a pelletizer (not shown in the figure). The strip plastic extruded by the extruder 1 passes through the cooling mechanism from right to left. The cooling mechanism comprises a water tank 1 2, a water tank 2 3 arranged above the water tank 1 2, and a driving assembly for driving the left and right ends of the water tank 2 3 to swing up and down. The left and right ends of the water tank 2 3 are respectively connected to the water tank 1 2 through a water pump 4, and the left and right ends of the water tank 2 3 are respectively provided with water outlets 31. A heater (not shown in the figure) and a temperature sensor (not shown in the figure) are arranged in the water tank 2 3. When the temperature sensor detects that the temperature of the cooling water in the water tank 2 3 is greater than the set maximum temperature value, an alarm is issued to prompt that new cooling water needs to be added to the water tank 1 2. When the temperature sensor detects that the temperature of the cooling water in the water tank 2 3 is less than the set minimum temperature value, the heater is controlled to heat the cooling water in the water tank 2 3.

[0036] When the driving component drives the left end of water tank 2 3 to swing upward and the right end to swing downward, the water pump 4 connected to the left end of water tank 2 3 pumps the cooling water in water tank 1 2 4 into water tank 2 3, and the cooling water in water tank 2 3 is discharged to water tank 1 2 through the water outlet hole 31 at its right end; when the driving component drives the right end of water tank 2 3 to swing upward and the left end to swing downward, the water pump 4 connected to the right end of water tank 2 3 pumps the cooling water in water tank 1 2 4 into water tank 2 3, and the cooling water in water tank 2 3 is discharged to water tank 1 2 through the water outlet hole 31 at its left end.

[0037] The middle part of the water tank 2 3 is rotatably connected to the water tank 1 2 through a support rod 32. The driving assembly includes automatic telescopic rods 33 corresponding to the left and right ends of the water tank 2 3, respectively. The automatic telescopic rods 33 are symmetrically arranged on the front and rear sides of the water tank 2 3. The bottom end of the automatic telescopic rod 33 is fixedly installed on the water tank 1 2, and the driving end is connected to the water tank 2 3 through a connecting piece 5. As an example, the automatic telescopic rod 33 is an electric push rod.

[0038] There may be impurities in the plastic raw material and the pipes of the extruder 1. The water tank 1 2 and the water tank 2 3 are exposed to the environment and may also fall into impurities. Impurities mixed in the cooling water will reduce the heat conduction efficiency of the cooling water. If the impurities adhere to the strip plastic, they may be brought into the subsequent cutting, screening and packaging processes, thereby contaminating the final product. Therefore, in this embodiment, filter components are respectively arranged near the left and right ends of the water tank 2 3, and a recoil component is arranged on the filter component. A sewage outlet 34 is opened on the water tank 2 3, and the recoil component recoils the impurities filtered by the filter component into the sewage outlet 34.

[0039] like Figure 2 and Figure 3 As shown, the filter assembly includes a filter plate 6 fixedly connected to the water tank 2 3, and a filter hole 61 and a water inlet hole 62 are opened on the filter plate 6. When the water pump 4 pumps water into the water tank 2 3, the cooling water enters the water tank 2 3 through the water inlet hole 62. When the left end or the right end of the water tank 2 3 swings downward, the cooling water in the water tank 2 3 is filtered by the filter plate 6 at the corresponding end and then discharged from the water outlet hole 31 into the water tank 1 2.

[0040] like Figures 2 to 5 As shown, the two filter plates 6 in the second water tank 3 are respectively provided with stopper plates 7 on one side facing each other, and the stopper plates 7 are vertically slidably connected to the second water tank 3 and fit on the corresponding filter plates 6. A limiting structure is provided between the stopper plate 7 and the second water tank 3, and the limiting structure includes a slide groove 35 opened on the second water tank 3 and a slider (not shown in the figure) fixedly connected to the stopper plate 7, the top of the slide groove 35 is in a blocked state, and the slider is vertically slidably connected in the slide groove 35.

[0041] The connecting member 5 is rotatably connected to the driving end of the corresponding automatic telescopic rod 33, and an inverted T-shaped block 51 is fixedly connected to the bottom of the connecting member 5, and an inverted T-shaped groove 71 adapted to the inverted T-shaped block 51 is opened on the top of the stop plate 7. The connecting member 5 is slidably connected to the stop plate 7 along the left and right directions through the cooperation of the inverted T-shaped block 51 and the inverted T-shaped groove 71. Figure 3 and Figure 4 As shown, taking the stop plate 7 at the right end of the water tank 2 3 as an example, when the right end of the water tank 2 3 is at the lowest position, the stop plate 7 is located below the filter hole 61 on the filter plate 6 to avoid blocking the filter hole 61 and block the water inlet hole 62 on the filter plate 6 to ensure that the cooling water flows out smoothly from the filter hole 61. When the automatic telescopic rod 33 drives the stop plate 7 to move upward through the connecting piece 5, the stop plate 7 first moves upward relative to the filter plate 6, and when the slider abuts against the top of the slide 35, the stop plate 7 drives the left end of the water tank 2 3 to swing upward. At this time, the stop plate 7 covers the filter hole 61 on the filter plate 6 and exposes the water inlet hole 62 on the filter plate 6. The right end of the water tank 2 3 starts to take in water, and the left end starts to drain water.

[0042] Continue reading Figure 3 and Figure 5 The stop plate 7 is provided with a recoil chamber 72 on one side facing the corresponding filter plate 6, and a push structure is provided between the stop plate 7 and the filter plate 6. When the stop plate 7 moves upward along the filter plate 6, the push structure pushes the stop plate 7 to move away from the filter plate 6. When the slider abuts against the top of the slide groove 35, the push structure pulls the stop plate 7 to fit on the filter plate 6, and the filter hole 61 is located in the recoil chamber 72, and the recoil chamber 72 is connected with the sewage outlet 34. In the process of the stop plate 7 moving upward relative to the filter plate 6, the push structure pushes the stop plate 7 in the direction away from the filter plate 6, which can prevent the impurities attached to the filter plate 6 from being scraped above the stop plate 7 during the upward movement of the stop plate 7, which is conducive to the recoil chamber 72 to cover the filtered impurities, facilitate the recoil of impurities and centrally process the impurities.

[0043] like Figures 6 to 8 As shown, the recoil assembly includes a mounting box body 8 and a movable plug 81. The top of the mounting box body 8 is an open structure. A plurality of water storage chambers 82 are arranged in the mounting box body 8 along the front-to-back direction. The movable plug 81 is slidably arranged in the corresponding water storage chamber 82 along the up-down direction, and the bottom of the movable plug 81 is elastically connected to the mounting box body 8 through a spring 83. Figure 2 , Figure 3 and Figure 8 As shown, the installation box 8 is located on the side of the two filter plates 6 facing away from each other, and the installation box 8 is provided with a backwash hole 84 corresponding to the filter hole 61 and a water hole 85 corresponding to the water outlet hole 31. Figure 7 and Figure 8As shown, a water leakage hole 86 is opened on the movable plug 81, and a driving member is connected to the movable plug 81, and the mounting box body 8 and the stop plate 7 are connected through a door frame 9.

[0044] like Figures 2 to 4 , Figure 7 and Figure 8 As shown, when the stop plate 7 and the installation box body 8 are located below the filter hole 61, the water in the water tank 2 3 enters the installation box body 8 from the leaking hole 86 after being filtered by the filter plate 6, and enters the water outlet hole 31 from the water through hole 85 for discharge. When the connecting member 5 drives the stop plate 7 to move upward, the stop plate 7 drives the installation box body 8 to move upward synchronously through the door frame 9, and the groove wall of the water tank 2 3 blocks the water through hole 85 on the installation box body 8, and part of the cooling water remains in the water storage chamber 82 of the installation box body 8. When the slider on the stop plate 7 abuts against the top of the slide groove 35 on the water tank 2 3, the recoil hole 84 is aligned with the filter hole 61, and the driving member drives the movable plug 81 to move downward, squeezing the cooling water in the water storage chamber 82 to recoil the filter hole 61.

[0045] A one-way valve (not shown in the figure) is provided at the leakage hole 86. The one-way valve allows cooling water to enter the water storage chamber 82 from the leakage hole 86. When the driving member drives the movable plug 81 to move downward along the water storage chamber 82, the cooling water in the water storage chamber 82 will not overflow from the leakage hole 86, thereby ensuring that the cooling water effectively recoils the filter hole 61.

[0046] like Figure 2 , Figure 3 , Figures 6 to 8 As shown, the door frame 9 includes a frame body 1 91 and a frame body 2 92, the frame body 1 91 and the frame body 2 92 are elastically connected in the left-right direction by a spring 2, the frame body 1 91 is slidably connected to the stop plate 7 in the front-back direction, the frame body 2 92 is slidably connected to the installation box body 8 in the front-back direction, and the bottom of the frame body 2 92 is fixedly connected with an extrusion block 93. The driving member includes a motor 10 and a lead screw 101, the motor 10 is fixedly installed on the water tank 2 3, the lead screw 101 is rotatably connected to the water tank 2 3 and is transmission-connected to the output end of the motor 10, and the upper edge of the frame body 2 92 is vertically slidably connected with a movable block 94, and the movable block 94 is threadedly matched with the lead screw 101. The front and rear sides of the movable plug 81 are respectively provided with inclined surfaces 87. The motor 10 drives the screw 101 to drive the movable block 94 to move in the front and rear direction. The movable block 94 drives the door frame 9 and the extrusion block 93 to move in the front and rear direction. The extrusion block 93 drives the movable plug 81 to move downward by extruding the inclined surface 87. Since the movable plug 81 is elastically connected to the bottom of the installation box body 8, after the movable plug 81 squeezes the cooling water in the water storage chamber 82 to recoil, the movable plug 81 automatically moves upward and resets under the elastic force of the spring 83.

[0047] like Figures 3 to 5 , Figure 7 and Fig. 9As shown, the push structure includes a push block 63 fixedly mounted on the filter plate 6, and the upper and lower ends of the push block 63 are respectively provided with an inclined wedge surface 64, and the stop plate 7 is provided with a push groove 73 adapted to the push block 63. When the stop plate 7 is located below the filter hole 61 of the filter plate 6, the push block 63 is located in the push groove 73, and when the stop plate 7 moves upward relative to the filter plate 6, the inclined wedge surface 64 at the lower end of the push block 63 squeezes the push groove 73, so that the stop plate 7 moves in the direction away from the filter plate 6, and the spring 2 between the frame 1 91 and the frame 2 92 is stretched. When the stop plate 7 continues to move upward until its bottom is located at the inclined wedge surface 64 at the upper end of the push block 63, the elastic force of the spring 2 between the frame 1 91 and the frame 2 92 pulls the stop plate 7 to gradually move in the direction close to the filter plate 6, until the stop plate 7 is attached to the filter plate 6, and the recoil chamber 72 is covered on the filter hole 61. When the movable plug 81 squeezes the cooling water in the water storage chamber 82 to backwash the filter plate 6 , the impurities attached to the filter holes 61 are backwashed into the backwash chamber 72 and discharged from the sewage outlet 34 .

[0048] A brush (not shown in the figure) is provided on the side of the frame 91 facing the filter plate 6. When the stop plate 7 is located below the filter hole 61, the water inlet hole 62 is blocked. During the process of the cooling water in the water tank 2 3 being discharged from the filter hole 61 to the water tank 2, the control motor 10 drives the lead screw 101 to drive the movable block 94 to move in the front-to-back direction. When the movable block 94 drives the door frame 9 to move in the front-to-back direction, the brush on the frame 91 cleans the impurities on the filter plate 6 to prevent the impurities from clogging the filter hole 61 and affecting the smooth discharge of the cooling water in the water tank 2 3 into the water tank 2, thereby causing the problem that the cooling water in the water tanks 2 3 and 2 cannot be effectively circulated.

[0049] The working principle of the plastic extrusion granulation device of the present invention is as follows: the extruder 1 melts the plastic raw material and extrude the strip plastic, the strip plastic passes through the water tank 2 3 from right to left for cooling, and then enters the pelletizer for pelletizing; In the process of cooling the strip plastic, the automatic telescopic rod 33 cooperates to drive the left and right ends of the water tank 2 3 to swing in the up and down direction. When the left end of the water tank 2 3 is at the lowest position, the stop plate 7 at the left end of the water tank 2 3 is located below the filter hole 61 on the filter plate 6 and blocks the water inlet hole 62 on the filter plate 6. The water through hole 85 on the installation box body 8 at the left end of the water tank 2 3 is connected with the water outlet hole 31 at the left end of the water tank 2 3. After the cooling water in the water tank 2 3 flows out from the filter hole 61, it enters the water storage chamber 82 from the one-way valve on the movable plug 81, and enters the water outlet hole 31 from the water through hole 85, and is finally discharged into the water tank 1 2; The right end of the water tank 2 3 is at the highest position at this time, the stop plate 7 at the right end of the water tank 2 3 covers the filter hole 61 on the filter plate 6, and exposes the water inlet hole 62 on the filter plate 6, the water pump 4 at the right end of the water tank 2 3 pumps the cooling water in the water tank 1 2 into the water tank 2 3, and the cooling water flows to the left from the water inlet hole 62 on the filter plate 6, the motor 10 at the right end of the water tank 2 3 drives the lead screw 101 to drive the movable block 94 to move in the front-to-back direction, the movable block 94 drives the door frame 9 and the extrusion block 93 to move in the front-to-back direction, the extrusion block 93 drives the movable plug 81 to move downward through the extrusion inclined surface 87, the movable plug 81 squeezes the cooling water in the water storage chamber 82 to backwash the filter hole 61, the impurities and the backwashing cooling water enter the backwash chamber 72 of the stop plate 7, and flow to the sewage outlet 34 for discharge; After the interval setting time, the water pump 4 at the right end of the water tank 2 3 is controlled to stop working, and the automatic telescopic rod 33 is controlled to drive the left end of the water tank 2 3 to swing upward and the right end to swing downward. The stop plate 7 at the left end of the water tank 2 3 first moves upward relative to the filter plate 6 under the drive of the connecting piece 5. During the movement, the pushing structure pushes the stop plate 7 to move away from the filter plate 6. When the slider on the stop plate 7 abuts against the top of the slide groove 35 on the water tank 2 3, the pushing structure pulls the stop plate 7 to fit on the filter plate 6, and the stop plate 7 exposes the water inlet hole 62 on the filter plate 6. As the automatic telescopic rod 33 continues to drive, the stop plate 7 drives the left end of the water tank 2 3 to move upward to the highest position. The water pump 4 at the left end of the water tank 2 3 is controlled to work, and the cooling water in the water tank 1 2 is pumped into the water tank 2 3 by the pump 4, and the cooling water flows to the right through the water inlet hole 62 on the left end filter plate 6, and the motor 10 at the left end of the water tank 2 3 is controlled to work, so that the movable plug 81 squeezes the cooling water downward, and the filter hole 61 on the left end filter plate 6 is backwashed; At this time, the right end of the water tank 2 3 moves to the lowest position, and the stopper plate 7 at the right end is located below the filter hole 61. After the cooling water in the water tank 2 3 is filtered through the filter hole 61, it enters the water storage chamber 82 from the one-way valve on the movable plug 81, and enters the water outlet hole 31 at the right end of the water tank 2 3 from the water through hole 85 and is discharged into the water tank 1 2. After the interval setting time, the automatic telescopic rod 33 is controlled to drive the left end of the water tank 2 3 to swing downward and the right end to swing upward, and this is repeated to achieve the reciprocating swing of the left and right ends of the water tank 2 3 in the up and down directions.

[0050] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A plastic extrusion granulation device, comprising an extruder, a cooling mechanism and a granulator, wherein the strip plastic extruded by the extruder passes through the cooling mechanism from right to left, characterized in that: The cooling mechanism comprises a water tank 1, a water tank 2 arranged above the water tank 1, and a driving assembly for driving the left and right ends of the water tank 2 to swing up and down, the left and right ends of the water tank 2 are respectively connected to the water tank 1 through a water pump, and the left and right ends of the water tank 2 are respectively provided with water outlet holes; When the driving component drives the left end of water tank two to swing upward and the right end to swing downward, the water pump connected to the left end of water tank two pumps the cooling water in water tank one into water tank two. When the driving component drives the right end of water tank two to swing upward and the left end to swing downward, the water pump connected to the right end of water tank two pumps the cooling water in water tank one into water tank two.

2. The plastic extrusion granulation device according to claim 1, characterized in that: The second water tank is rotatably connected to the first water tank, and the driving assembly includes an automatic telescopic rod arranged on the left and right sides of the rotational connection between the second water tank and the first water tank, the automatic telescopic rod is fixedly installed on the first water tank, and the driving end of the automatic telescopic rod is connected to the second water tank through a connecting piece.

3. The plastic extrusion granulation device according to claim 2, characterized in that: Filter components are respectively arranged near the left and right ends in the second water tank, and a recoil component is arranged on the filter component. A sewage outlet is opened on the second water tank, and the recoil component recoils the impurities filtered by the filter component into the sewage outlet.

4. The plastic extrusion granulation device according to claim 3, characterized in that: The filter assembly includes a filter plate fixedly connected to the water tank 2, and the filter plate is provided with filter holes and water inlet holes. When the water pump pumps water into the water tank 2, cooling water enters the water tank 2 through the water inlet holes. When the left end or the right end of the water tank 2 swings downward, the cooling water in the water tank 2 is filtered by the filter plate at the corresponding end and then discharged from the water outlet hole into the water tank 1.

5. The plastic extrusion granulation device according to claim 4, characterized in that: The two filter plates in the second water tank are respectively provided with stop plates on one side facing each other, and the stop plates are slidably connected to the second water tank along the vertical direction and fit onto the corresponding filter plates. A limiting structure is provided between the stop plate and the second water tank, and the connecting piece is rotatably connected to the corresponding driving end of the automatic telescopic rod, and the connecting piece is slidably connected to the stop plate along the left and right directions. When the automatic telescopic rod drives the stop plate to move upward through the connecting piece until the limiting structure acts, the stop plate drives one end of the second water tank to swing upward, and the stop plate covers the filter holes on the filter plate.

6. The plastic extrusion granulation device according to claim 5, characterized in that: A recoil cavity is provided on one side of the stop plate toward the corresponding filter plate, and a pushing structure is provided between the stop plate and the filter plate. When the stop plate moves upward along the filter plate, the pushing structure pushes the stop plate to move in a direction away from the filter plate. When the limiting structure acts, the pushing structure pulls the stop plate to fit onto the filter plate, the filter hole is located in the recoil cavity, and the recoil cavity is connected to the sewage outlet.

7. The plastic extrusion granulation device according to claim 6, characterized in that: The recoil assembly comprises an installation box body with an opening at the top and a movable plug connected to the installation box body in a vertical sliding manner, the installation box body is located on one side of the two filter plates facing away from each other, the installation box body is provided with a recoil hole corresponding to the filter hole and a water through hole corresponding to the water outlet hole, the movable plug is provided with a leakage hole, and the movable plug is connected to a driving member, and the installation box body is connected to the stop plate; water in the second water tank enters the installation box body from the leakage hole after being filtered by the filter plate, and enters the water outlet hole from the water through hole and is discharged, when the stop plate drives the installation box body to move upward, the groove wall of the second water tank blocks the water through hole, and cooling water remains in the installation box body, when the limiting structure acts, the recoil hole is aligned with the filter hole, and the driving member drives the movable plug to move downward, squeezing the water in the installation box body to recoil the filter hole.

8. The plastic extrusion granulation device according to claim 7, characterized in that: A plurality of water storage cavities are provided in the installation box body at intervals along the front-to-back direction, the movable plug is slidably provided in the corresponding water storage cavity along the up-down direction, and the bottom of the movable plug is elastically connected to the installation box body, and a one-way valve is provided at the leakage hole, and the one-way valve allows cooling water to enter the water storage cavity from the leakage hole.

9. The plastic extrusion granulation device according to claim 8, characterized in that: The installation box body and the stop plate are connected by a door frame, and the door frame is slidably connected to the installation box body and the stop plate respectively along the front and rear directions, and an extrusion block is arranged at the bottom of the door frame, and the driving member includes a motor and a screw, and the motor is fixedly installed on the water tank two, and the screw is rotatably connected to the water tank two and is transmission connected to the output end of the motor, and a movable block is vertically slidably connected on the door frame, and the movable block is threadedly matched with the screw, and inclined surfaces are respectively arranged on the front and rear sides of the movable plug, and the motor drives the screw to drive the movable block to move along the front and rear directions, and the movable block drives the door frame and the extrusion block to move along the front and rear directions, and the extrusion block drives the movable plug to move downward by extruding the inclined surface.

10. The plastic extrusion granulation device according to claim 9, characterized in that: The door-type frame includes an elastically connected frame body 1 and a frame body 2, the frame body 1 is slidably connected to the stop plate, and the frame body 2 is slidably connected to the installation box body, the pushing structure includes a pushing block fixedly installed on the filter plate, the upper and lower ends of the pushing block are respectively provided with inclined wedge surfaces, and the stop plate is provided with a pushing groove adapted to the pushing block. When the stop plate moves upward, the inclined wedge surface located at the lower end squeezes the groove surface of the pushing groove, so that the stop plate moves in the direction away from the filter plate. When the filter plate passes over the pushing block, the frame body 1 drives the stop plate to fit onto the filter plate, the recoil chamber cover is arranged on the filter hole, and a brush is arranged on the side of the frame body 1 facing the filter plate.

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