Plastic extrusion molding machine and continuous molding equipment thereof

Abstract

The invention relates to the technical field of plastic extruding machines, and provides a plastic extrusion forming machine and continuous forming equipment thereof, and the plastic extrusion forming machine comprises a forming device used for heating, melting and extruding plastic; the feeding device is used for feeding materials to the forming device, the feeding device comprises a feeding barrel, and a rotating inner barrel and a motor capable of driving the rotating inner barrel to rotate in the feeding barrel to conduct centrifugal material distribution are arranged in the feeding barrel; a material lifting component for spirally lifting plastic particles with larger sizes under the synchronous driving of a motor is arranged in the rotary inner barrel; small plastic particles are guided out of the rotating inner barrel through centrifugal material distribution of the rotating inner barrel, and large plastic particles are lifted by the material lifting component, then are subjected to primary material grinding by the material grinding component and are guided to the grinding component through the first material guide plate to be subjected to secondary material grinding. The multi-stage grinding process ensures that the plastic particles are uniform in size, and the problem of non-uniform heating in subsequent processing is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of extruders, in particular to a plastic extrusion molding machine and continuous molding equipment thereof. Background Art

[0002] Extruders are essential plastics machinery, enabling the production and manufacturing of most plastic products. In existing technologies, plastic pellets are pressed into a spiral extruder after being granulated. However, due to the uneven size of the plastic pellets, the melting time after entering the spiral extruder varies, resulting in inconsistent quality of the molded products, leading to rework or product scrapping.

[0003] To this end, announcement number CN118906418B discloses a plastic extrusion molding machine, which includes a spiral agent barrel and a feed port connected to the top of the spiral agent barrel, and also includes a grinding component capable of processing plastic particles to uniform size, the grinding component is connected to the feed port, and the grinding component includes a grinding cylinder and a centrifugal cylinder arranged in the grinding cylinder; a cleaning component elastically connected to the inner wall of the grinding cylinder, the cleaning component is annularly equidistantly arrayed on the outer wall of the centrifugal cylinder, the top of the feed port is symmetrically connected with two groups of feed troughs, a support plate is connected between the two groups of feed troughs, the grinding cylinder is rotatably installed above the support plate by a second rotating shaft, the plastic extrusion molding machine performs two grinding processes on the plastic particles to be processed, fully ensuring that the plastic particles are of the same size and are ground evenly, thereby ensuring the same heating time, and can be heated evenly in the spiral agent barrel, ensuring the finished quality of the plastic products.

[0004] However, the above-mentioned plastic extrusion molding machine still has the following problems: the above-mentioned plastic extrusion molding machine uniformly grinds plastics of different sized particles once or twice, does not have the function of material separation and grinding, is relatively simple in function, and lacks functions such as preheating, cooling and heat recovery, and does not form a complete continuous molding equipment, which to a certain extent limits its application scope and efficiency in actual production. Summary of the Invention

[0005] The present invention provides a plastic extrusion molding machine and continuous molding equipment thereof, which solve the problems in the prior art of lacking material separation and grinding and having relatively single functions.

[0006] The technical solution of the present invention is as follows: a continuous molding device for plastic extrusion, comprising: A molding device for heating, melting, and extruding the plastic; A feeding device for feeding material to the forming device, the feeding device comprising a feeding barrel, a rotating inner barrel and a motor capable of driving the rotating inner barrel to rotate in the feeding barrel for centrifugal material separation are provided in the feeding barrel, a lifting component is provided in the rotating inner barrel for spirally lifting larger plastic particles under the synchronous drive of the motor, an abrasive component is provided in the feeding barrel for squeezing and grinding the plastic particles lifted by the lifting component, a grinding seat is provided below the rotating inner barrel for receiving the plastic particles guided out of the rotating inner barrel and ground by the abrasive component, a supporting component for rotatably supporting the rotating inner barrel is provided between the abrasive component and the grinding seat, and a grinding component is provided in the grinding seat for performing secondary grinding on the plastic particles under the transmission drive of the motor; An extrusion sleeve is used for extruding the hot melt plastic extruded by the feeding device; Condensation coils, used to cool the plastic tubes formed in the extrusion sleeve; The cooling pump unit is used to transfer the heat absorbed by the condensing coil when cooling the plastic pipe to the lifting component to preheat the plastic particles.

[0007] A feeding port is provided on the top of the feeding barrel, a supporting plate is fixed in the feeding barrel, the grinding seat is fixed on the supporting plate, and a plurality of evenly distributed second guide holes are opened at the center position of the supporting plate.

[0008] Preferably, the rotating inner barrel includes an inner barrel body, which is rotatably connected to the feed barrel, and the inner barrel body is a conical structure with a diameter gradually decreasing from top to bottom. The lower half of the inner barrel body is provided with a plurality of evenly distributed first guide holes, and a material guide pipe arranged along the axial direction of the inner barrel body is fixed on the inner side of the inner barrel body, and material distribution pipes leading to the outside of the inner barrel body are fixed on both sides of the top of the material guide pipe. The inner side of the bottom of the inner barrel body is provided with an upper chamber and a lower chamber separated from each other, and the motor is fixed in the lower chamber, and the lower chamber is circumferentially distributed with annular teeth, and the material guide pipe is located at the bottom cavity part of the inner barrel body and is provided with a through opening.

[0009] Preferably, the material lifting component includes a transmission pipe shaft, which is rotatably connected to the material guide pipe, and the lower end of the transmission pipe shaft is fixed to the output end of the motor. The transmission pipe shaft is a hollow structure, and the transmission pipe shaft is provided with an air hole at the position where the transmission pipe shaft is located in the upper chamber. The upper end of the transmission pipe shaft extends to the outside of the material supply barrel and is rotatably connected to a rotary joint. The transmission pipe shaft is fixed with a spiral heat conducting plate at the position where the transmission pipe shaft is located in the material guide pipe, and the transmission pipe shaft is fixed with a driving gear at the position where the transmission pipe shaft is located in the lower chamber.

[0010] Preferably, the abrasive component includes a first material guide plate, which is fixed in the material supply barrel, and is a conical structure with a diameter gradually decreasing from top to bottom. A first grinding plate is fixed to the bottom of the first material guide plate, and the first grinding plate is a conical structure with a diameter gradually increasing from top to bottom. A second grinding plate is arranged below the first grinding plate, and the second grinding plate is fixed outside the inner barrel body. The second grinding plate is a conical structure with a diameter gradually increasing from top to bottom, and the gap formed between the second grinding plate and the first grinding plate gradually decreases from top to bottom.

[0011] Preferably, the supporting component includes a second material guide plate, which is fixed in the material supply barrel. The second material guide plate is a conical structure with a diameter gradually decreasing from top to bottom. A rotating bracket rotatably connected to the inner barrel body is fixed at the bottom of the second material guide plate.

[0012] Preferably, the grinding component includes a conical grinding disc, and two driven crankshafts are rotatably connected to the top two sides of the conical grinding disc. The two driven crankshafts are rotatably connected to the inner barrel body. The upper ends of the two driven crankshafts extend into the lower chamber and are fixed with transmission gears. The transmission gears are respectively engaged with the driving gear and the annular gear. Several grooves are provided on the conical surface of the conical grinding disc.

[0013] Preferably, a conical grinding groove is provided at the center of the grinding seat, the conical grinding disc is eccentrically arranged relative to the conical grinding groove, and a plurality of protrusions that match the groove when rotating are provided on the conical surface of the conical grinding groove.

[0014] Preferably, a molding pressure cavity is provided in the extrusion sleeve, and the condensing coil is embedded in the extrusion sleeve and spirally distributed along the axial direction of the molding pressure cavity; The cooling pump group includes a circulating pump, the input end of the circulating pump is connected to the rotary joint through a water inlet pipe, the output end of the circulating pump is connected to the water inlet end of the condensing coil through a water outlet pipe, and the water outlet end of the condensing coil is connected to the upper chamber through a pipeline.

[0015] The present invention also proposes a plastic extrusion molding machine, which is a molding device in the above-mentioned continuous molding equipment for plastic extrusion, the molding device includes a base, a driving unit is fixed on the base, a barrel is fixed on the base through a support frame, an auger fixed to the output end of the driving unit is rotatably connected in the barrel, the auger extends to the outside of the barrel at one end away from the driving unit and is threadedly installed with a pressing head, and a feed port connected to the bottom of the feed barrel is provided at the top of the end of the barrel close to the driving unit.

[0016] The beneficial effects of the present invention are: In this invention, smaller plastic particles are centrifugally separated and discharged from the rotating inner barrel. Larger plastic particles are lifted by the lifting component, initially ground by the grinding component, and then guided by the first guide plate to the grinding component for secondary grinding. This multi-stage grinding process ensures uniform plastic particle size, reducing uneven heating issues during subsequent processing. In this invention, the cooling pump unit transfers heat absorbed by the condensing coil to the first chamber via a circulating pump. The heat is then transferred to the plastic pellets via spiral heat-conducting fins within the drive shaft. This design preheats the plastic pellets before they enter the molding device, improving melt efficiency and reducing energy consumption. The rotating inner barrel of the present invention has a conical structure, with multiple first guide holes in the lower half of the barrel. A motor drives the inner barrel to rotate, generating centrifugal force. Smaller plastic particles are separated through the first guide holes, while larger particles enter the guide tube through the opening for lifting and grinding. This centrifugal separation method effectively separates particles of different sizes, ensuring the efficiency and effectiveness of subsequent grinding. Compared with existing technologies, it achieves classified grinding and ensures uniformity of the ground particles. The conical grinding disc in the grinding unit of this invention is connected to the inner barrel via a driven crankshaft and rotates eccentrically within the conical grinding groove. The grooves on the conical grinding disc mate with the protrusions on the conical grinding groove, further grinding the plastic particles during rotation. This eccentric design increases the contact area and force of the grinding, improving the grinding effect. In this invention, the condensing coil is embedded in the extruded sleeve. After absorbing heat from the plastic tube in the condensing coil, the cooling medium is transported to the upper chamber through the pipeline. From there, it enters the inner cavity of the transmission tube shaft through the air holes and is finally transferred to the plastic particles through the spiral heat conducting plate. This design achieves heat recovery and recycling, not only improving energy efficiency but also reducing the energy consumption of the cooling system. The entire process of this invention, from feeding, heating and melting, extrusion, to cooling, forms an automated, continuous production process. Driven by a drive unit, the auger in the molding device continuously spirals the plastic pellets forward, heating and melting them before extrusion into the extrusion sleeve. This automated design improves production efficiency, reduces manual intervention, and is suitable for large-scale production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a schematic structural diagram of the continuous molding equipment for plastic extrusion proposed by the present invention; Figure 2 This is a schematic diagram of the half-section structure of the feeding device proposed in the present invention; Figure 3This is a half-section front view structural diagram of the feeding device proposed by the present invention; Figure 4 This is a schematic diagram of the half-section structure of the feeding barrel proposed by the present invention; Figure 5 This is a schematic diagram of the half-section structure of the rotating inner barrel proposed by the present invention; Figure 6 This is a schematic structural diagram of the material lifting component proposed in the present invention; Figure 7 This is a schematic diagram of the structure of the grinding component proposed by the present invention; Figure 8 This is a schematic diagram of the half-section structure of the extrusion sleeve proposed in the present invention; Figure 9 This is a schematic structural diagram of the molding device proposed in the present invention; In the figure: 1. forming device; 11. base; 12. driving unit; 13. barrel; 14. support frame; 15. auger; 16. pressing head; 17. feeding port; 2. feeding device; 21. feeding barrel; 211. feeding port; 212. supporting plate; 213. second guide hole; 22. rotating inner barrel; 221. inner barrel body; 222. first guide hole; 223. guide pipe; 224. material distribution pipe; 225. upper chamber; 226. lower chamber; 227. ring gear; 228. through port; 23. motor; 24. lifting component; 241. transmission pipe shaft; 242. driving gear; 2 43. Air hole; 244. Spiral heat conducting plate; 245. Rotary joint; 25. Abrasive component; 251. First guide plate; 252. First grinding plate; 253. Second grinding plate; 26. Support component; 261. Second guide plate; 262. Rotary bracket; 27. Grinding component; 271. Conical grinding disc; 272. Driven crankshaft; 273. Transmission gear; 274. Groove; 28. Grinding seat; 281. Conical grinding groove; 282. Protrusion; 3. Extrusion sleeve; 31. Molding pressure chamber; 4. Condensing coil; 5. Cooling pump group; 51. Circulation pump; 52. Water inlet pipe; 53. Water outlet pipe. DETAILED DESCRIPTION

[0019] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0020] See also Figure 1 and Figure 2 、 Figure 3The present invention provides a technical solution: a continuous molding device for plastic extrusion, including a molding device 1, a feeding device 2, an extrusion sleeve 3, a condensing coil 4 and a cooling pump group 5. The molding device 1 is used to heat, melt and extrude the plastic; the feeding device 2 is used to feed the molding device 1, and the feeding device 2 includes a feeding barrel 21, a rotating inner barrel 22 and a motor 23 that can drive the rotating inner barrel 22 to rotate in the feeding barrel 21 to perform centrifugal material separation, the rotating inner barrel 22 is provided with a lifting component 24 that spirally lifts larger plastic particles under the synchronous drive of the motor 23, the feeding barrel 21 is provided with an abrasive component 25 that extrudes and grinds the plastic particles lifted by the lifting component 24, a grinding seat 28 is provided below the rotating inner barrel 22 for receiving the plastic particles exported from the rotating inner barrel 22 and polished by the abrasive component 25, a supporting component 26 for rotating the rotating inner barrel 22 is provided between the abrasive component 25 and the grinding seat 28, and a transmission drive 23 is provided in the grinding seat 28. The feeding device 2 is composed of a rotating inner barrel 22, a lifting component 24, an abrasive component 25, a supporting component 26 and a grinding component 27. The smaller plastic particles are guided out of the rotating inner barrel 22 through the centrifugal separation of the rotating inner barrel 22, while the larger plastic particles are lifted by the lifting component 24, subjected to preliminary grinding by the abrasive component 25, and then guided to the grinding component 27 for secondary grinding through the supporting component 26. The entire equipment forms an automated continuous production process from feeding, heating and melting, extrusion to cooling.

[0021] See also Figure 4 A feeding port 211 is provided on the top of the feeding barrel 21 , a support plate 212 is fixed in the feeding barrel 21 , the grinding seat 28 is fixed on the support plate 212 , and a plurality of evenly distributed second guide holes 213 are opened at the center of the support plate 212 .

[0022] See also Figure 5The rotating inner barrel 22 includes an inner barrel body 221, which is rotatably connected to the feed barrel 21. The inner barrel body 221 is a tapered structure with a diameter gradually decreasing from top to bottom. The lower half of the inner barrel body 221 is provided with a plurality of evenly distributed first guide holes 222. A guide pipe 223 arranged along the axial direction of the inner barrel body 221 is fixed on the inner side of the inner barrel body 221. The top two sides of the guide pipe 223 are fixed with a distribution pipe 224 leading to the outside of the inner barrel body 221. The inner side of the bottom of the inner barrel body 221 is provided with an upper chamber 225 and a lower chamber 226 separated from each other. Chamber 226. Motor 23 is fixed within lower chamber 226, which is circumferentially distributed with annular teeth 227. A guide tube 223, located at the bottom cavity of inner barrel 221, has a through opening 228. The rotating inner barrel 22 has a conical structure, and the lower half of inner barrel 221 is provided with multiple first guide holes 222. Motor 23 drives inner barrel 221 to rotate, generating centrifugal force. Smaller plastic particles are separated through first guide holes 222, while larger particles enter guide tube 223 through through opening 228 for lifting and grinding. This centrifugal separation method effectively separates particles of different sizes, ensuring the efficiency and effectiveness of subsequent grinding.

[0023] See also Figure 6 The material lifting component 24 includes a transmission pipe shaft 241, which is rotatably connected to the guide pipe 223. The lower end of the transmission pipe shaft 241 is fixed to the output end of the motor 23. The transmission pipe shaft 241 is a hollow structure. The transmission pipe shaft 241 is located in the upper chamber 225 and is provided with an air hole 243. The upper end of the transmission pipe shaft 241 extends to the outside of the feeding barrel 21 and is rotatably connected to a rotary joint 245. The transmission pipe shaft 241 is located in the guide pipe 223 and is fixed with a spiral heat conducting plate 244. The transmission pipe shaft 241 is located in the lower chamber 226 and is fixed with a driving gear 242.

[0024] See also Figure 3 、 Figure 4 The abrasive component 25 includes a first guide plate 251, which is fixed in the feed barrel 21. The first guide plate 251 is a conical structure with a diameter gradually decreasing from top to bottom. A first grinding plate 252 is fixed to the bottom of the first guide plate 251. The first grinding plate 252 is a conical structure with a diameter gradually increasing from top to bottom. A second grinding plate 253 is arranged below the first grinding plate 252. The second grinding plate 253 is fixed to the outside of the inner barrel body 221. The second grinding plate 253 is a conical structure with a diameter gradually increasing from top to bottom, and the gap formed between the second grinding plate 253 and the first grinding plate 252 gradually decreases from top to bottom. The supporting component 26 includes a second guide plate 261, which is fixed in the feed barrel 21. The second guide plate 261 is a conical structure with a diameter gradually decreasing from top to bottom. A rotating bracket 262 rotatably connected to the inner barrel body 221 is fixed to the bottom of the second guide plate 261.

[0025] See also Figure 4 and Figure 7 The grinding component 27 includes a conical grinding disc 271, and two driven crankshafts 272 are rotatably connected to the top two sides of the conical grinding disc 271. The two driven crankshafts 272 are rotatably connected to the inner barrel body 221. The upper ends of the two driven crankshafts 272 extend into the lower chamber 226 and are fixed with transmission gears 273. The transmission gears 273 are respectively meshed with the driving gear 242 and the annular gear 227. A plurality of grooves 274 are provided on the conical surface of the conical grinding disc 271, and a conical grinding groove 281 is provided at the center position of the grinding seat 28. The conical grinding disc 271 is eccentrically arranged relative to the conical grinding groove 281, and a plurality of protrusions 282 are provided on the conical surface of the conical grinding groove 281 that match the grooves 274 when rotating. The conical grinding disc 271 in the grinding component 27 is connected to the inner barrel body 221 through the driven crankshaft 272 and rotates eccentrically around the axis in the conical grinding groove 281. The groove 274 on the conical grinding disc 271 matches the protrusion 282 on the conical grinding groove 281, further grinding the plastic particles during the rotation process. This eccentric design increases the contact area and force of grinding, thereby improving the grinding effect.

[0026] See also Figure 8 A molding pressure cavity 31 is opened in the extrusion sleeve 3 , and the condensing coil 4 is embedded in the extrusion sleeve 3 and spirally distributed along the axial direction of the molding pressure cavity 31 .

[0027] See also Figure 1 The cooling pump assembly 5 includes a circulating pump 51. The input of the circulating pump 51 is connected to the rotary joint 245 via an inlet pipe 52. The output of the circulating pump 51 is connected to the water inlet of the condensing coil 4 via an outlet pipe 53. The outlet of the condensing coil 4 is connected to the upper chamber 225 via a pipeline. The cooling pump assembly 5 transfers heat absorbed by the condensing coil 4 to the first chamber 225 via the circulating pump 51. The heat is then transferred to the plastic pellets via the spiral heat conducting fins 244 within the transmission shaft 241. This design preheats the plastic pellets before they enter the molding device 1, improving hot melt efficiency and reducing energy consumption.

[0028] The present invention also proposes a plastic extrusion molding machine, which is a molding device 1 in the above-mentioned continuous molding equipment for plastic extrusion. The molding device 1 includes a base 11, on which a driving unit 12 is fixed, and a barrel 13 is fixed to the base 11 through a support frame 14. An auger 15 fixed to the output end of the driving unit 12 is rotatably connected in the barrel 13. The auger 15 extends to the outside of the barrel 13 away from the end of the driving unit 12 and is threadedly installed with a pressing head 16. A feed port 17 connected to the bottom of the feeding barrel 21 is provided at the top of the end of the barrel 13 close to the driving unit 12. The auger 15 in the molding device 1 continuously spirally guides the plastic particles forward under the drive of the driving unit 12, and is heated and melted and then extruded and molded in the extrusion sleeve 3.

[0029] The working principle and use process of the present invention are as follows: During processing, the motor 23 drives the transmission tube shaft 241 to rotate, and the inner barrel body 221 is driven to rotate in the feeding barrel 21 by the meshing of the driving gear 242 and the transmission gear 273, and the meshing of the transmission gear 273 and the annular gear 227. The centrifugal force generated by the rotation of the feeding barrel 21 causes the plastic particles to roll close to the inner wall of the inner barrel body 221, so that the smaller plastic particles are separated through the first guide hole 222, while the larger plastic particles enter the guide tube 223 through the opening 228 under the action of gravity; The spiral heat conducting plate 244 outside the transmission pipe shaft 241 rotates to lift the larger plastic particles entering the guide pipe 223 in a spiral manner, and guide them out through the distribution pipes 224 on both sides of the top of the guide pipe 223. As the inner barrel body 221 continues to rotate, the guided plastic particles are evenly scattered on the periphery of the inner barrel body 221, and then enter the gap between the first grinding plate 252 and the second grinding plate 253 under the guidance of the first guide plate 251. Since the gap formed between the second grinding plate 253 and the first grinding plate 252 gradually decreases from top to bottom, the second grinding plate 253 can squeeze and grind the plastic particles in the gap into smaller particles as the inner barrel body 221 rotates. The plastic particles discharged from the first guide hole 222 and ground by the second grinding plate 253 and the first grinding plate 252 are guided by the second guide plate 261 and fall into the conical grinding groove 281 of the grinding seat 28. When the driving gear 242 is engaged with the transmission gears 273 on both sides and the two driven crankshafts 272 are rotated, the conical grinding disc 271 can be driven to rotate eccentrically around the axis in the conical grinding groove 281. The grooves 274 on the conical surface of the conical grinding disc 271 and the protrusions 282 on the conical surface of the conical grinding groove 281 are pressed against each other to further grind the plastic particles, so that the plastic particles that meet the requirements pass through the second guide hole 213 and enter the barrel 13 through the feed port 17. The driving unit 12 of the molding device 1 drives the auger 15 to rotate, continuously guiding the plastic particles entering the barrel 13 forward in a spiral manner. During the guiding process, the plastic particles are fully heated to a molten state and enter the molding cavity 31 of the extrusion sleeve 3. The gap of fixed width formed by the pressing head 16 and the molding cavity 31 is extruded and formed. During the process of plastic being extruded by the extrusion sleeve 3, the heat is absorbed by the cooling medium in the condensing coil 4, and then transported to the upper chamber 225 through the pipeline, and enters the inner cavity of the transmission pipe shaft 241 through the air hole 243, and is conducted upward along the transmission pipe shaft 241. The spiral heat conducting plate 244 absorbs part of the heat in the transmission pipe shaft 241 and transfers it to the spirally guided plastic particles, thereby preheating the plastic particles. The cooling medium that has absorbed heat is conducted out through the water inlet pipe 52, and is pumped to the condensing coil 4 by the circulation pump 51 and the water outlet pipe 53 for circulation and heat recovery.

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Continuous molding equipment for plastic extrusion, characterized in that: include: A molding device (1) for heating, melting, and extruding the plastic; A feeding device (2) is used to feed materials to a molding device (1), wherein the feeding device (2) comprises a feeding barrel (21), wherein a rotating inner barrel (22) and a motor (23) are provided in the feeding barrel (21) for driving the rotating inner barrel (22) to rotate in the feeding barrel (21) to perform centrifugal material separation, wherein a lifting component (24) is provided in the rotating inner barrel (22) for spirally lifting larger plastic particles under synchronous driving of the motor (23), and wherein the feeding barrel (21) is provided with a lifting component (24). 4) an abrasive component (25) for extruding and grinding the lifted plastic particles, a grinding seat (28) for receiving the plastic particles discharged from the rotating inner barrel (22) and after being ground by the abrasive component (25) is provided below the rotating inner barrel (22), a supporting component (26) for rotatably supporting the rotating inner barrel (22) is provided between the abrasive component (25) and the grinding seat (28), and a grinding component (27) for performing secondary grinding on the plastic particles under the drive of the motor (23) is provided in the grinding seat (28); An extrusion sleeve (3) is used for extruding the hot melt plastic extruded by the feeding device (2); A condensing coil (4) for cooling the plastic tube formed in the extrusion sleeve (3); The cooling pump group (5) is used to transfer the heat absorbed by the condensing coil (4) when cooling the plastic pipe to the material lifting component (24) to preheat the plastic particles.

2. The continuous molding equipment for plastic extrusion according to claim 1, characterized in that: A feeding port (211) is provided at the top of the feeding barrel (21), a support plate (212) is fixed in the feeding barrel (21), the grinding seat (28) is fixed on the support plate (212), and a plurality of evenly distributed second guide holes (213) are opened at the center of the support plate (212).

3. The continuous molding equipment for plastic extrusion according to claim 1, characterized in that: The rotating inner barrel (22) includes an inner barrel body (221), the inner barrel body (221) is rotatably connected to the feeding barrel (21), the inner barrel body (221) is a conical structure with a diameter gradually decreasing from top to bottom, the lower half of the inner barrel body (221) is provided with a plurality of evenly distributed first guide holes (222), the inner side of the inner barrel body (221) is fixed with a guide pipe (223) arranged along the axial direction of the inner barrel body (221), and the guide pipe (223) is fixed to the inner side of the inner barrel body (221). The top of the inner barrel (221) is provided with a material distribution pipe (224) on both sides thereof, leading to the outside of the inner barrel (221). The inner side of the bottom of the inner barrel (221) is provided with an upper chamber (225) and a lower chamber (226) separated from each other. The motor (23) is fixed in the lower chamber (226). The lower chamber (226) is provided with annular teeth (227) distributed circumferentially. The material guide pipe (223) is located in the bottom chamber of the inner barrel (221) and is provided with a through opening (228).

4. The continuous molding equipment for plastic extrusion according to claim 3, characterized in that: The material lifting component (24) includes a transmission pipe shaft (241), the transmission pipe shaft (241) is rotatably connected to the material guide pipe (223), the lower end of the transmission pipe shaft (241) is fixed to the output end of the motor (23), the transmission pipe shaft (241) is a hollow structure, the transmission pipe shaft (241) is located in the upper chamber (225) and is provided with an air hole (243), the upper end of the transmission pipe shaft (241) extends to the outside of the material supply barrel (21) and is rotatably connected to a rotary joint (245), the transmission pipe shaft (241) is located in the material guide pipe (223) and is fixed with a spiral heat conducting plate (244), and the transmission pipe shaft (241) is located in the lower chamber (226) and is fixed with a driving gear (242).

5. The continuous molding equipment for plastic extrusion according to claim 3, characterized in that: The abrasive component (25) includes a first material guide plate (251), which is fixed in the material supply barrel (21), and is a conical structure with a diameter gradually decreasing from top to bottom. A first grinding plate (252) is fixed at the bottom of the first material guide plate (251), and is a conical structure with a diameter gradually increasing from top to bottom. A second grinding plate (253) is provided below the first grinding plate (252), and the second grinding plate (253) is fixed outside the inner barrel body (221). The second grinding plate (253) is a conical structure with a diameter gradually increasing from top to bottom, and a gap formed between the second grinding plate (253) and the first grinding plate (252) gradually decreases from top to bottom.

6. The continuous molding equipment for plastic extrusion according to claim 3, characterized in that: The supporting component (26) includes a second material guide plate (261), which is fixed in the material supply barrel (21). The second material guide plate (261) is a conical structure with a diameter gradually decreasing from top to bottom. A rotating bracket (262) rotatably connected to the inner barrel body (221) is fixed at the bottom of the second material guide plate (261).

7. The continuous molding equipment for plastic extrusion according to claim 4, characterized in that: The grinding component (27) includes a conical grinding disc (271). Two driven crankshafts (272) are rotatably connected to the top and sides of the conical grinding disc (271). The two driven crankshafts (272) are rotatably connected to the inner barrel (221). The upper ends of the two driven crankshafts (272) extend into the lower chamber (226) and are fixed with transmission gears (273). The transmission gears (273) are respectively engaged with the driving gear (242) and the annular gear (227). A plurality of grooves (274) are provided on the conical surface of the conical grinding disc (271).

8. The continuous molding equipment for plastic extrusion according to claim 7, characterized in that: A conical grinding groove (281) is provided at the center of the grinding seat (28), the conical grinding disc (271) is eccentrically arranged relative to the conical grinding groove (281), and a plurality of protrusions (282) are provided on the conical surface of the conical grinding groove (281) that match the groove (274) when rotating.

9. The continuous molding equipment for plastic extrusion according to claim 4, characterized in that: A forming pressure cavity (31) is provided in the extrusion sleeve (3), and the condensing coil (4) is embedded in the extrusion sleeve (3) and distributed in an axial spiral along the forming pressure cavity (31); The cooling pump group (5) includes a circulating pump (51), the input end of the circulating pump (51) is connected to the rotary joint (245) through a water inlet pipe (52), the output end of the circulating pump (51) is connected to the water inlet end of the condensing coil (4) through a water outlet pipe (53), and the water outlet end of the condensing coil (4) is connected to the upper chamber (225) through a pipeline.

10. A plastic extrusion molding machine, the continuous molding equipment for plastic extrusion according to claim 1, characterized in that: The molding device (1) includes a base (11), a driving unit (12) is fixed on the base (11), a barrel (13) is fixed on the base (11) via a support frame (14), an auger (15) fixed to the output end of the driving unit (12) is rotatably connected in the barrel (13), the auger (15) extends from one end of the driving unit (12) to the outside of the barrel (13) and is threadedly mounted with a pressing head (16), and a feed port (17) is provided at the top of one end of the barrel (13) close to the driving unit (12) and communicated with the bottom of the feed barrel (21).

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