Recycled polyester granulation equipment and granulation method with material blocking and dredging structure

Abstract

The present invention relates to the technical field of granulators, and in particular to a recycled polyester granulating device and a granulating method with a blocking and unblocking structure, comprising an extrusion unit, a cooling unit and a cutting unit, wherein the extrusion unit comprises a discharge shell; the discharge shell has two discharge ports arranged horizontally, an ejection unit is arranged inside the discharge shell, and the ejection unit comprises an ejection shell moving along the arrangement direction of the two discharge ports, the discharge shell can rotate around the ejection unit and rotate 180 degrees each time, so that the two discharge ports can switch back and forth between a processing position and a cleaning position, the discharge port in the processing position is in an extrusion state, and the discharge port in the cleaning position is in a cleaning state, the spatial state position of the processing position and the cleaning position relative to the ejection unit remains unchanged, and when the discharge port is in the cleaning state, the ejection shell moves toward the discharge port in the cleaning state and extrude the recycled polyester remaining in the discharge port. The present invention improves the cleaning effect and also improves the production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of granulators, in particular to recycled polyester granulating equipment and a granulating method with a material blocking and dredging structure. Background Art

[0002] The existing granulators have the following problems:

[0003] 1. When the material starts to flow into the lower hopper, the impurities and dust are not completely removed, and the pretreatment process is not fully implemented, which will lead to a decrease in the purity of the recycled polyester material, thus affecting the quality of the product. Moreover, if the impurities and dust accumulate at the feed port for a long time, the recycled polyester special material cannot enter the equipment normally, which will cause equipment shutdown or output reduction, and may cause production interruption, and may also cause problems such as abnormal equipment operation and pressure accumulation, resulting in equipment damage and failure, and increasing the risk of safety accidents;

[0004] 2. Because the quality distribution of recycled polyester materials in the silo is uneven, or the moisture content exceeds the normal standard range, this situation will cause the stacked polyester materials to clump in the container, which will hinder the smooth flow of materials to a certain extent and increase the risk of equipment blockage, resulting in the equipment being unable to operate normally and causing the equipment to overload. Overload operation not only increases the energy consumption of the equipment, but may also damage the equipment components, shorten the life of the equipment, and increase the difficulty of equipment maintenance and cleaning.

[0005] Chinese patent application CN116945398A discloses a granulation device for recycled polyester special material for chemical fiber, comprising a granulator body, a feed hopper arranged at the upper end of the granulator body, a processing pipeline arranged at the lower end of the feed hopper, a discharge port installed at the front side of the processing pipeline, a dusting mechanism arranged at the left and right inner side walls at the upper end of the feed hopper, a dust suction mechanism for absorbing dust arranged at the front and rear inner side walls at the upper end of the feed hopper, and an anti-blocking mechanism arranged at the front side of the processing pipeline; the dusting mechanism is used to remove dust attached to the material to ensure the purity of the output recycled polyester material, and the dust suction mechanism and the anti-blocking mechanism are used to dredge the material stuck on the discharge port to ensure smooth discharge; The dust-dusting mechanism comprises: a fixed bar arranged on the left and right inner walls of the feed hopper, a rack arranged in the middle of the inner wall of the fixed bar, a connecting column fixedly connected to the rack, a sliding block slidably connected to the outer side of the connecting column, a dust-beating plate fixedly connected to the lower end of the sliding block, a gear meshing with the inner wall of the rack, a cam fixedly connected to the right side of the gear, bumps arranged at the front and rear ends of the inner wall of the fixed bar, a piston rod fixedly connected to the rear side of the bump, a spring fixedly connected to the end of the piston rod away from the bump, a piston cylinder arranged on the outer wall of the piston rod, an air hole arranged on the piston cylinder, a one-way air inlet valve arranged on the rear side of the piston cylinder, and an air outlet pipe penetrating the middle part of the one-way air inlet valve.

[0006] Although the above scheme is provided with an anti-blocking mechanism, the anti-blocking mechanism in the above scheme will block the discharge port of the granulator when it is in operation, that is, the granulator cannot granulate normally when the anti-blocking mechanism is performing the anti-blocking operation, and when the anti-blocking mechanism in the above scheme is cleaning the discharge port of the granulator, the anti-blocking mechanism will push the recycled polyester blocked at the discharge port into the granulator, and the recycled polyester pushed into the granulator is mostly in a solidified state, which may easily cause further blockage inside the granulator, and the entire granulator may be easily blocked after long-term use. Summary of the invention

[0007] In view of the above problems, a recycled polyester granulation device and a granulation method with a blocking and unblocking structure are provided. When in use, the molten recycled polyester is injected into a discharge shell and discharged from one of the discharge ports of the discharge shell. After the regenerated polyester is discharged through the discharge port for a specified time, the molten recycled polyester in the discharge shell stops feeding, and then the discharge shell rotates 180 degrees, and the discharge shell switches another unused discharge port to the processing position. The used discharge port rotates 180 degrees and switches to the cleaning position. The discharge shell continues to feed the discharge port at the processing position, and the ejector shell moves toward the discharge port at the cleaning position and discharges the regenerated polyester remaining at the discharge port from the discharge port. When the ejector shell reaches the discharge port, After the processing, the ejector rod extends from the ejector shell, and the ejector rod ejects the recycled polyester blocked in the molding hole. After the ejection is completed, the ejector rod retracts into the ejector shell, and then the ejector shell also retracts and resets. At this time, although the discharge port in the cleaning position has completed the cleaning, the corresponding supply cavity still will not be injected with molten recycled polyester. Only when the discharge shell rotates again and the discharge port that has been cleaned is rotated to the processing position, the molten recycled polyester can be injected into the supply cavity. In this way, when the discharge port is cleaned, the recycled polyester can be prevented from remaining in the supply cavity corresponding to the discharge port. At the same time, during the cleaning, it can also ensure that the recycled polyester can continue to be processed into strips for production, thereby improving the cleaning effect and the production efficiency.

[0008] In order to solve the problems of the prior art, the present invention provides a recycled polyester granulation device with a blocking and unblocking structure, comprising an extrusion unit, a cooling unit and a cutting unit, wherein the extrusion unit comprises a discharge shell; the discharge shell has two discharge ports arranged horizontally, an ejection unit is arranged inside the discharge shell, and the ejection unit comprises an ejection shell moving along the arrangement direction of the two discharge ports, the discharge shell can rotate around the ejection unit and rotate 180 degrees each time, so that the two discharge ports can switch back and forth between a processing position and a cleaning position, the discharge port in the processing position is in an extrusion state, and the discharge port in the cleaning position is in a cleaning state, and the spatial state positions of the processing position and the cleaning position relative to the ejection unit remain unchanged, and when the discharge port is in the cleaning state, the ejection shell moves toward the discharge port in the cleaning state and extrude the recycled polyester remaining in the discharge port.

[0009] Preferably, a molding shell is sleeved on the discharge port and moves along the extension direction of the discharge port, a plurality of molding holes are evenly opened on the end of the molding shell, the recycled polyester is extruded into a strip structure through the molding holes, and an ejector rod is horizontally arranged on the ejector shell, the ejector rod corresponds to the molding holes on the molding shell one by one, and the diameter of the ejector rod is the same as the aperture of the molding hole.

[0010] Preferably, the ejection unit includes a central shell for accommodating the ejection shell, the central shell is a vertical cylindrical structure, a slide groove is provided on the ejection shell facing the discharge port in the cleaning state, the ejection shell is slidably arranged in the slide groove along the extension direction of the slide groove, and the ejection shell is in a retracted state when the discharge shell rotates, and when the ejection shell is retracted into the slide groove, the ejection end of the ejection shell is completely matched with the side wall of the central shell.

[0011] Preferably, a feed port is provided on the central shell toward the discharge port in the extrusion state, the feed port is communicated with the discharge port at the processing position, and the molten recycled polyester enters the discharge shell through the feed port and is discharged from the discharge port in the extrusion state.

[0012] Preferably, when cleaning the discharge port in a cleaning state, the ejector shell first moves along the extension direction of the discharge port toward the discharge port in a cleaning state. After the end of the ejector shell reaches the discharge port, the ejector rod extends from the end of the ejector shell and extends into the forming hole.

[0013] Preferably, an air supply unit for supplying air to the slide groove is provided at the bottom of the central shell. When the air supply unit supplies air to the slide groove, the ejection shell slides out of the slide groove. There is a cavity in the ejection shell. A switch valve connecting the slide groove and the cavity is provided on the ejection shell. After the ejection shell is ejected, the switch valve opens, the cavity is inflated, and the cavity ejects the ejection rod from the ejection shell.

[0014] Preferably, a driving unit is provided between the two forming shells on the two discharge ports to drive the two forming shells to move synchronously along the extending direction of the discharge ports.

[0015] Preferably, a rotating unit for driving the discharge shell to rotate is arranged at the bottom of the discharge shell, and the rotating unit comprises a second gear ring, the second gear ring is fixedly arranged at the bottom of the discharge shell, and the discharge shell rotates synchronously with the second gear ring.

[0016] Preferably, a cleaning unit is provided at one end of the discharge port when in the cleaning state, and the cleaning unit includes a cleaning roller. When the discharge port is in the cleaning state, the cleaning roller moves in a vertical direction and passes through the end of the forming shell where the forming hole is provided, and the cleaning roller completely sweeps the end of the forming shell.

[0017] The present invention also relates to a recycled polyester granulation method with a material blocking and unblocking structure, which adopts a recycled polyester granulation device with a material blocking and unblocking structure, injects molten recycled polyester into a discharge shell and discharges it from one of the discharge ports of the discharge shell, and after the regenerated polyester is discharged through the discharge port for a specified time, the molten regenerated polyester in the discharge shell stops feeding, and then the discharge shell rotates 180 degrees, and the discharge shell switches another unused discharge port to a processing position, and the used discharge port rotates 180 degrees and switches to a cleaning position, and the discharge shell continues to feed the discharge port at the processing position, and the ejection shell moves toward the discharge port at the cleaning position and discharges the regenerated polyester remaining at the discharge port from the discharge port, and after the ejection shell reaches the discharge port, the ejection rod extends from the ejection shell, and the ejection rod ejects the regenerated polyester blocked in the forming hole.

[0018] Compared with the prior art, the present invention has the following beneficial effects: when the present invention is used, the molten recycled polyester is injected into the discharge shell and discharged from one of the discharge ports of the discharge shell; after the recycled polyester is discharged through the discharge port for a specified time, the molten recycled polyester in the discharge shell stops feeding, and then the discharge shell rotates 180 degrees, and the discharge shell switches another unused discharge port to the processing position; the used discharge port rotates 180 degrees and switches to the cleaning position; the discharge shell continues to feed the discharge port at the processing position; the ejector shell moves toward the discharge port at the cleaning position and discharges the recycled polyester remaining at the discharge port from the discharge port; after the ejector shell reaches the discharge port, the ejector rod moves from the discharge port to the cleaning position; The ejector rod extends out from the ejector shell, and ejects the recycled polyester blocked in the molding hole. After the ejection is completed, the ejector rod retracts into the ejector shell, and then the ejector shell also retracts and resets. At this time, although the discharge port in the cleaning position has completed the cleaning, the corresponding supply cavity still will not be injected with molten recycled polyester. Only when the discharge shell rotates again, so that the discharge port that has been cleaned rotates to the processing position, the molten recycled polyester can be injected into the supply cavity. In this way, when the discharge port is cleaned, it can be avoided that the recycled polyester remains in the supply cavity corresponding to the discharge port. At the same time, it can also ensure that the recycled polyester can continue to be processed into strips while cleaning, thereby improving the cleaning effect and the production efficiency. In addition, the present invention is also provided with a driving unit that drives the two molding shells to move synchronously along the extension direction of the discharge port, which can discharge part of the recycled polyester while reducing the volume of the supply cavity, thereby reducing unnecessary material loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of a recycled polyester granulation device with a material blocking and unblocking structure;

[0020] Figure 2 It is a side view of a recycled polyester granulation device with a material blocking and unblocking structure;

[0021] Figure 3It is a recycled polyester granulation equipment with a blocking and unblocking structure. Figure 2 Schematic cross-sectional view at AA in the middle;

[0022] Figure 4 It is a cutaway stereoscopic schematic diagram of a recycled polyester granulation device with a material blocking and unblocking structure;

[0023] Figure 5 It is a recycled polyester granulation equipment with a blocking and unblocking structure. Figure 4 A partial enlarged schematic diagram of point B in the middle;

[0024] Figure 6 It is a recycled polyester granulation equipment with a blocking and unblocking structure. Figure 4 A partial enlarged schematic diagram of point C in the middle;

[0025] Figure 7 A three-dimensional schematic diagram of a recycled polyester granulation equipment with a blocking and dredging structure after removing the outer frame Figure 1 ;

[0026] Figure 8 It is a recycled polyester granulation equipment with a blocking and unblocking structure. Figure 7 A partial enlarged schematic diagram of point D in the middle;

[0027] Fig. 9 It is a recycled polyester granulation equipment with a blocking and unblocking structure. Figure 7 A partial enlarged schematic diagram of point E in the middle;

[0028] Fig.10 A three-dimensional schematic diagram of a recycled polyester granulation equipment with a blocking and dredging structure after removing the outer frame Figure 2 .

[0029] The numbers in the figure are:

[0030] 1. Discharge shell; 11. Discharge port; 12. Forming shell; 121. Forming hole; 13. Driving unit; 131. Fixed frame; 132. First threaded rod; 1321. Groove; 133. First guide rod; 134. First gear ring; 135. First gear; 136. First rotary drive; 2. Ejection unit; 21. Ejection shell; 211. Ejection rod; 22. Center shell; 221. Slide; 222. Feed port; 23. Air supply unit; 231. Air supply pipe; 232. Air pump; 24. Switch valve; 3. Rotating unit; 31. Second gear ring; 32. Second gear; 33. Second rotary drive; 4. Cleaning unit; 41. Cleaning roller; 42. Third rotary drive; 43. Lifting frame; 44. Second threaded rod; 45. Second guide rod; 46. Fourth rotary drive; 47. Collecting box. DETAILED DESCRIPTION

[0031] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] Reference Figure 2 , Figure 3 and Figure 5 A recycled polyester granulation device with a blocking and unblocking structure comprises an extrusion unit, a cooling unit and a cutting unit, wherein the extrusion unit comprises a discharge shell 1; the discharge shell 1 has two discharge ports 11 arranged horizontally, an ejection unit 2 is arranged inside the discharge shell 1, and the ejection unit 2 comprises an ejection shell 21 moving along the arrangement direction of the two discharge ports 11, the discharge shell 1 can rotate around the ejection unit 2 and rotate 180 degrees each time, so that the two discharge ports 11 can switch back and forth between a processing position and a cleaning position, the discharge port 11 in the processing position is in an extrusion state, and the discharge port 11 in the cleaning position is in a cleaning state, and the spatial state positions of the processing position and the cleaning position relative to the ejection unit 2 remain unchanged, and when the discharge port 11 is in the cleaning state, the ejection shell 21 moves toward the discharge port 11 in the cleaning state and extrude the recycled polyester remaining in the discharge port 11.

[0033] The granulation equipment includes an extrusion unit, a cooling unit and a cutting unit. The molten recycled polyester is injected into the extrusion unit for extrusion. The recycled polyester after the extrusion unit is in a long strip state. The recycled polyester extruded into a long strip is cooled by the cooling unit and then enters the cutting unit for cutting into granules. The present invention mainly improves the extrusion unit. A supply cavity is provided on one side of the discharge port 11 of the discharge shell 1. The supply cavity is located inside the discharge shell 1 and communicates with the discharge port 11. When the recycled polyester is discharged from the discharge port 11 at the processing position, the molten recycled polyester first enters the supply cavity. The molten recycled polyester is then discharged from the discharge port 11 after the cavity is formed. The working principle of the extrusion unit is as follows: the molten recycled polyester is injected into the discharge shell 1 and discharged from one of the discharge ports 11 of the discharge shell 1. After the recycled polyester is discharged through the discharge port 11 for a specified time, the molten recycled polyester in the discharge shell 1 stops feeding. The specified time needs to be set according to the actual situation. If the recycled polyester solidifies faster when discharged at the currently set specified time, the specified time needs to be appropriately shortened. Then the discharge shell 1 rotates 180 degrees, and the discharge shell 1 switches another unused discharge port 11 When the discharge port 11 is at the processing position, the used discharge port 11 is rotated 180 degrees and switched to the cleaning position. The discharge shell 1 continues to feed the discharge port 11 at the processing position, and the ejection shell 21 moves toward the discharge port 11 at the cleaning position and discharges the regenerated polyester remaining at the discharge port 11 from the discharge port 11. After the ejection shell 21 reaches the discharge port 11, the ejection rod 211 extends from the ejection shell 21, and the ejection rod 211 ejects the regenerated polyester blocked in the forming hole 121. After the ejection is completed, the ejection rod 211 retracts into the ejection shell 21, and then the ejection shell 21 is ejected. It also retracts and resets. Although the discharge port 11 in the cleaning position has completed cleaning, the corresponding supply cavity still will not be injected with molten recycled polyester. Only when the discharge shell 1 is rotated again to make the discharge port 11 that has completed cleaning rotate to the processing position, the molten recycled polyester can be injected into the supply cavity. In this way, when the discharge port 11 is cleaned, it can avoid the recycled polyester from remaining in the supply cavity corresponding to the discharge port 11. At the same time, during cleaning, it can also ensure that the recycled polyester can continue to be processed into strips, thereby improving the cleaning effect and the production efficiency.

[0034] Reference Figure 1 and Figure 6 : A molding shell 12 is sleeved on the discharge port 11 and moves along the extension direction of the discharge port 11. A plurality of molding holes 121 are evenly opened on the end of the molding shell 12. The recycled polyester is extruded into a strip structure through the molding holes 121. An ejector rod 211 is horizontally arranged on the ejector shell 21. The ejector rod 211 corresponds to the molding holes 121 on the molding shell 12 one by one, and the diameter of the ejector rod 211 is the same as the aperture of the molding hole 121.

[0035] In this way, after the ejector rod 211 extends from the ejector shell 21 , the ejector rod 211 can penetrate the forming hole 121 , and the recycled polyester blocked in the forming hole 121 can be completely ejected by the ejector rod 211 , thus completing the cleaning of the forming hole 121 .

[0036] Reference Figure 3 and Figure 4 The ejection unit 2 includes a central shell 22 for accommodating an ejection shell 21. The central shell 22 is a vertical cylindrical structure. A slide groove 221 is provided on the ejection shell 21 facing the discharge port 11 in the cleaning state. The ejection shell 21 is slidably arranged in the slide groove 221 along the extension direction of the slide groove 221. The ejection shell 21 is in a retracted state when the discharge shell 1 rotates. When the ejection shell 21 is retracted into the slide groove 221, the ejection end of the ejection shell 21 is completely matched with the side wall of the central shell 22.

[0037] Only after the ejection shell 21 is retracted into the slide groove 221 can the discharge shell 1 rotate smoothly. This is because after the ejection shell 21 is retracted into the slide groove 221, the ejection end of the ejection shell 21 is completely matched with the side wall of the center shell 22, and the center shell 22 is a cylindrical structure. The discharge shell 1 is not easily blocked by the protruding ejection shell 21 when rotating.

[0038] Reference Figure 3 and Figure 4 The central shell 22 is provided with a feed port 222 on one side facing the discharge port 11 in the extrusion state, and the feed port 222 is communicated with the discharge port 11 in the processing position. The molten recycled polyester enters the discharge shell 1 through the feed port 222 and is discharged from the discharge port 11 in the extrusion state.

[0039] The feed port 222 is communicated with a supply cavity corresponding to the discharge port 11 at the processing position, and the molten recycled polyester enters the supply cavity at the processing position through the feed port 222 .

[0040] Reference Figure 1-Figure 10 When cleaning the discharge port 11 in the cleaning state, the ejector shell 21 first moves along the extension direction of the discharge port 11 toward the discharge port 11 in the cleaning state. After the end of the ejector shell 21 reaches the discharge port 11, the ejector rod 211 extends from the end of the ejector shell 21 and extends into the forming hole 121.

[0041] There is a supply cavity at the discharge port 11, which is located in the discharge shell 1 and communicates with the discharge port 11. When the discharge port 11 is in a cleaning state, the ejection shell 21 moves toward the discharge port 11 in the cleaning state, and the supply cavity corresponding to the discharge port 11 is gradually compressed. The regenerated polyester remaining at the discharge port 11 mentioned above refers to the regenerated polyester remaining in the supply cavity. As the ejection shell 21 slides out of the chute 221 of the center shell 22, all the regenerated polyester in the supply cavity is ejected through the molding hole 121 of the molding shell 12, and then the ejection shell 21 at the end is ejected. The ejector rod 211 is extended again, so that the recycled polyester blocked in the ejection hole can be ejected. If the ejector rod 211 on the ejection shell 21 is always in an extended state, during the movement of the ejector shell 21, the ejector rod 211 blocks the molding hole 121 before the ejector shell 21 reaches the discharge port 11. As a result, the recycled polyester remaining in the molding shell 12 cannot be discharged through the molding hole 121, which causes the recycled polyester to remain in the supply cavity. When the discharge port 11 is used for discharge next time, the residual solidified recycled polyester will easily block the molding hole 121.

[0042] Reference Figure 5 , Figure 7 and Fig. 9 : An air supply unit 23 for supplying air to the slide groove 221 is provided at the bottom of the central shell 22. When the air supply unit 23 supplies air to the slide groove 221, the ejection shell 21 slides out of the slide groove 221. There is a cavity in the ejection shell 21. A switch valve 24 connecting the slide groove 221 and the cavity is provided on the ejection shell 21. After the ejection shell 21 is ejected, the switch valve 24 is opened, the cavity is inflated, and the cavity ejects the ejection rod 211 from the ejection shell 21.

[0043] After the discharge shell 1 rotates 180 degrees, the used discharge port 11 rotates to the cleaning position, and then the air supply unit 23 is started. The air supply unit 23 pumps gas into the chute 221, and the ejection shell 21 located in the chute 221 slides out of the chute 221 under the push of the gas. When the ejection shell 21 reaches the discharge port 11, the switch valve 24 arranged on the ejection shell 21 is opened, so that the cavity in the ejection shell 21 is communicated with the chute 221, and the ejection rod 211 located in the cavity is ejected under the action of pneumatic force. The air supply unit 23 includes an air supply pipe 231 and an air pump 232. The air supply pipe 231 is fixedly arranged at the bottom of the center shell 22 and communicates with the chute 221. The air pump 232 is arranged at the end of the air supply pipe 231. The air pump 232 can draw the outside air into the chute 221 through the air supply pipe 231, and can also draw the air in the chute 221 out through the air supply pipe 231.

[0044] Reference Figure 7 , Figure 8 and Fig.10A driving unit 13 is provided between the two forming shells 12 on the two discharge ports 11 to drive the two forming shells 12 to move synchronously along the extending direction of the discharge ports 11 .

[0045] The driving unit 13 includes a fixing frame 131, a first threaded rod 132, a first guide rod 133, a first gear ring 134, a first gear 135 and a first rotation driver 136. The fixing frame 131 is fixedly arranged on the side wall of the discharge shell 1. The first screw rod passes through the fixing frame 131 and is slidably matched with the fixing frame 131. The groove 1321 is opened on the side wall of the first threaded rod 132 along the extension direction of the first threaded rod 132. The first threaded rod 132 is key-matched with the fixing frame 131 through the groove 1321. The two ends of the first threaded rod 132 are respectively fixedly connected to the forming shells 12 arranged on the two discharge ports 11. The first guide rod 133 The first guide rod 133 is arranged on one side of the first threaded rod 132 in parallel with the axis of the first threaded rod 132, the first guide rod 133 penetrates the fixing frame 131 and slides with the fixing frame 131, the first toothed ring 134 is sleeved on the first threaded rod 132 and threadedly matched with the first threaded rod 132, the first toothed ring 134 is located on one side of the fixing frame 131, the first gear 135 is rotatably arranged on one side of the first toothed ring 134, the first gear 135 and the first toothed ring 134 are meshed with each other, the first rotation driver 136 is arranged at the end of the first gear 135, the first rotation driver 136 drives the first toothed ring 134 to rotate through the first gear 135, and the first rotation driver 136 drives the first toothed ring 134 to rotate. The actuator 136 is preferably a servo motor. When the first rotation driver 136 is started, the first rotation driver 136 drives the first gear ring 134 to rotate through the first gear 135. Since the first gear ring 134 is threadedly matched with the first threaded rod 132, and the first gear ring 134 is arranged on the fixing frame 131, and the first threaded rod 132 is key-matched with the fixing frame 131, after the first gear ring 134 rotates, the first threaded rod 132 can move along the extension direction of the discharge port 11. During the movement of the first threaded rod 132, the first threaded rod 132 drives one of the molded shells 12 to approach the center shell 22, so that the other molded shell 12 Move in the direction away from the center shell 22. Before the discharge shell 1 rotates, the molding shell 12 corresponding to the discharge port 11 at the processing position gradually compresses the supply chamber under the drive of the driving unit 13. The supply chamber mentioned above is composed of the molding shell 12, the discharge shell 1 and the center shell 22 mounted on the discharge port 11. When the molding shell 12 approaches the center shell 22, the volume of the supply chamber decreases. While the supply chamber is reduced, part of the recycled polyester in the supply chamber caused by the reduction in volume can be discharged. In this way, after the discharge shell 1 rotates 180 degrees, the ejection shell 21 can reduce unnecessary material loss when squeezing out the recycled polyester remaining in the supply chamber.

[0046] Reference Figure 7 and Fig. 9A rotating unit 3 for driving the discharging shell 1 to rotate is arranged at the bottom of the discharging shell 1. The rotating unit 3 includes a second gear ring 31. The second gear ring 31 is fixedly arranged at the bottom of the discharging shell 1. The discharging shell 1 rotates synchronously with the second gear ring 31.

[0047] The rotating unit 3 also includes a second gear 32 and a second rotation driver 33. The second gear 32 is rotatably arranged on one side of the second gear ring 31. The second gear ring 31 and the second gear 32 are meshed with each other. The second rotation driver 33 is arranged at the end of the second gear 32. The second rotation driver 33 is used to drive the second gear 32 to rotate. The second rotation driver 33 is preferably a servo motor. When the second rotation driver 33 is started, the second rotation driver 33 drives the second gear 32 to rotate the second gear ring 31, thereby rotating the discharge shell 1.

[0048] Reference Figure 1 , Figure 2 and Fig.10 : A cleaning unit 4 is provided at one end of the discharge port 11 when in the cleaning state, and the cleaning unit 4 includes a cleaning roller 41. When the discharge port 11 is in the cleaning state, the cleaning roller 41 moves in a vertical direction and passes through the end of the forming shell 12 where the forming hole 121 is provided, and the cleaning roller 41 completely sweeps the end of the forming shell 12.

[0049] The cleaning unit 4 includes a third rotary driver 42, a lifting frame 43, a second threaded rod 44, a second guide rod 45, a fourth rotary driver 46 and a collecting box 47. The lifting frame 43 is arranged on the periphery of the cleaning roller 41, and the cleaning roller 41 is rotatably arranged on the lifting frame 43. The third rotary driver 42 is arranged on the lifting frame 43. The third rotary driver 42 is used to drive the cleaning roller 41 to rotate. The second threaded rod 44 vertically penetrates the lifting frame 43 and is threadedly matched with the lifting frame 43. The second guide rod 45 is arranged on one side of the second threaded rod 44 parallel to the axis of the second threaded rod 44. The second guide rod 45 vertically penetrates the lifting frame 43 and is slidably matched with the lifting frame 43. The fourth rotary driver 46 is arranged at the end of the second threaded rod 44. The fourth rotary driver 46 drives the second threaded rod 44 to rotate. After the second threaded rod 44 rotates, it can drive the lifting frame 43 to rise and fall. The third rotary driver 42 and the fourth rotary driver 46 are preferably servo motors. A collecting box 47 for collecting the recycled polyester that has been cleaned is arranged below the lifting frame 43.

[0050] Reference Figure 1-Figure 10The present invention also relates to a recycled polyester granulation method with a blocking and unblocking structure, which adopts a recycled polyester granulation equipment with a blocking and unblocking structure, injects molten recycled polyester into a discharge shell 1 and discharges it from one of the discharge ports 11 of the discharge shell 1, and after the regenerated polyester is discharged through the discharge port 11 for a specified time, the molten regenerated polyester in the discharge shell 1 stops feeding, and then the discharge shell 1 rotates 180 degrees, and the discharge shell 1 switches another unused discharge port 11 to a processing position, and the used discharge port 11 rotates 180 degrees and switches to a cleaning position, and the discharge shell 1 continues to feed the discharge port 11 at the processing position, and the ejector shell 21 moves toward the discharge port 11 at the cleaning position and discharges the regenerated polyester remaining at the discharge port 11 from the discharge port 11, and after the ejector shell 21 reaches the discharge port 11, the ejector rod 211 extends from the ejector shell 21, and the ejector rod 211 ejects the regenerated polyester blocked in the molding hole 121.

[0051] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A recycled polyester granulation device with a material blocking and unblocking structure, comprising an extrusion unit, a cooling unit and a cutting unit, wherein the extrusion unit comprises a discharge shell (1); characterized in that: The discharge shell (1) has two discharge ports (11) arranged horizontally. An ejection unit (2) is arranged inside the discharge shell (1). The ejection unit (2) includes an ejection shell (21) that moves along the arrangement direction of the two discharge ports (11). The discharge shell (1) can rotate around the ejection unit (2) and rotate 180 degrees each time, so that the two discharge ports (11) can switch back and forth between a processing position and a cleaning position. The discharge port (11) in the processing position is in an extrusion state, and the discharge port (11) in the cleaning position is in a cleaning state. The spatial state positions of the processing position and the cleaning position relative to the ejection unit (2) remain unchanged. When the discharge port (11) is in the cleaning state, the ejection shell (21) moves toward the cleaning position. The ejection shell (21) is provided with a molding shell (12) which moves along the extension direction of the ejection shell (11), and a plurality of molding holes (121) are evenly opened on the end of the molding shell (12). The recycled polyester is extruded into a strip-shaped structure through the molding holes (121). An ejection rod (211) is horizontally arranged on the ejection shell (21). The ejection rod (211) corresponds to the molding holes (121) on the molding shell (12) one by one, and the diameter of the ejection rod (211) is the same as the diameter of the molding holes (121). The ejection unit (2) includes a central shell (21) for accommodating the ejection shell (21). 2, the central shell (22) is a vertical cylindrical structure, and a slide groove (221) is provided on the side of the ejection shell (21) facing the discharge port (11) in the cleaning state, and the ejection shell (21) is slidably arranged in the slide groove (221) along the extension direction of the slide groove (221), and the ejection shell (21) is in a retracted state when the discharge shell (1) rotates. When the ejection shell (21) is retracted into the slide groove (221), the ejection end of the ejection shell (21) is completely matched with the side wall of the central shell (22); when cleaning the discharge port (11) in the cleaning state, the ejection shell (21) first moves along the extension direction of the discharge port (11) toward the discharge port (11) in the cleaning state, and the ejection shell (21) is moved to the discharge port (11) in the cleaning state. After the end of the ejector shell (21) reaches the discharge port (11), the ejector rod (211) extends from the end of the ejector shell (21) and extends into the forming hole (121); an air supply unit (23) for supplying air to the slide groove (221) is provided at the bottom of the central shell (22); when the air supply unit (23) supplies air to the slide groove (221), the ejector shell (21) slides out of the slide groove (221), and a cavity is provided in the ejector shell (21); a switch valve (24) connecting the slide groove (221) and the cavity is provided on the ejector shell (21); after the ejector shell (21) is ejected, the switch valve (24) is opened, the cavity is inflated, and the cavity ejects the ejector rod (211) from the ejector shell (21).

2. The recycled polyester granulation equipment with a material blocking and unblocking structure according to claim 1 is characterized in that: A feed port (222) is provided on the central shell (22) on the side facing the discharge port (11) in the extrusion state. The feed port (222) is communicated with the discharge port (11) at the processing position. The molten recycled polyester enters the discharge shell (1) through the feed port (222) and is discharged from the side of the discharge port (11) in the extrusion state.

3. The recycled polyester granulation equipment with a material blocking and unblocking structure according to claim 1 is characterized in that: A driving unit (13) is provided between the two molding shells (12) on the two discharge ports (11) for driving the two molding shells (12) to move synchronously along the extension direction of the discharge ports (11).

4. The recycled polyester granulation equipment with a material blocking and unblocking structure according to claim 1 is characterized in that: A rotating unit (3) for driving the discharge shell (1) to rotate is arranged at the bottom of the discharge shell (1); the rotating unit (3) comprises a second gear ring (31); the second gear ring (31) is fixedly arranged at the bottom of the discharge shell (1); the discharge shell (1) rotates synchronously with the second gear ring (31).

5. The recycled polyester granulation equipment with a material blocking and unblocking structure according to claim 1, characterized in that: A cleaning unit (4) is provided at one end of the discharge port (11) when in a cleaning state. The cleaning unit (4) comprises a cleaning roller (41). When the discharge port (11) is in a cleaning state, the cleaning roller (41) moves in a vertical direction and passes through an end of the molding shell (12) provided with a molding hole (121). The cleaning roller (41) completely sweeps the end of the molding shell (12).

6. A method for granulating recycled polyester with a material blocking and unblocking structure, using a recycled polyester granulating device with a material blocking and unblocking structure as claimed in any one of claims 1 to 4, characterized in that: The molten recycled polyester is injected into a discharge shell (1) and discharged from one of the discharge ports (11) of the discharge shell (1). After the regenerated polyester is discharged through the discharge port (11) for a specified time, the molten recycled polyester in the discharge shell (1) stops feeding. The discharge shell (1) then rotates 180 degrees, and the discharge shell (1) switches another unused discharge port (11) to a processing position. The used discharge port (11) rotates 180 degrees and switches to a cleaning position. The discharge shell (1) continues to feed the discharge port (11) at the processing position. The ejector shell (21) moves toward the discharge port (11) at the cleaning position and discharges the regenerated polyester remaining at the discharge port (11) from the discharge port (11). After the ejector shell (21) reaches the discharge port (11), an ejector rod (211) extends from the ejector shell (21), and the ejector rod (211) ejects the regenerated polyester blocked in the molding hole (121).

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