Plastic line pipe extrusion forming die with groove-shaped outer pipe wall structure and forming method of plastic line pipe extrusion forming die

Abstract

The invention discloses a plastic line pipe extrusion forming mold with a groove-shaped outer pipe wall structure, which comprises a refrigeration box, a main control cover, a case, a spiral feeding extrusion cylinder, a processing table, a cold air box, an electric push rod, an embossing plate, an outer wall forming mold and a plastic line pipe forming cylinder, the plastic line pipe forming cylinder and the first motor are arranged at the two ends of the spiral feeding extrusion cylinder correspondingly, the first motor is connected with a mounting base plate through a reduction gearbox, and the bottom of the mounting base plate is connected with a guide groove guide clamping plate in the middle of the top end of the machining table through a guide clamping plate. A guide lug in the middle of the guide clamping plate is in transmission connection with a screw in the middle of the guide groove. The plastic line pipe forming cylinder is arranged at the end of the spiral feeding extrusion cylinder, the plastic line pipe forming cylinder and the spiral feeding extrusion cylinder are assembled for use, it can be guaranteed that extruded slurry is directly processed, the cold air box is arranged on the outer side of the plastic line pipe forming cylinder, line pipes in the plastic line pipe forming cylinder can be cooled and formed in time through the cold air box, and efficiency is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastic wire tube extrusion molding die, in particular to a plastic wire tube extrusion molding die with a groove-shaped outer tube wall structure and a molding method thereof. BACKGROUND

[0002] Wire tube, also known as electrical wire tube, is a kind of pipe system for electrical cable laying and protection. It is widely used in electrical engineering to organize, protect and guide electrical cables, while providing physical support and isolation to ensure the safe and reliable operation of electrical systems. Extrusion die is a kind of molding die, but its discharge mode is realized by the action of extrusion. It is widely used in aluminum profile structure and also used in plastic parts. At the front end of the extruder, it is used for pipe or profile.

[0003] For example, the authorized patent (PVC wire tube die) with publication number CN207190230U discloses a PVC wire tube die. By increasing the inner hole diameter of the die and the gap size between the die and the core, the die can avoid the large die swelling force caused by the sharp change of the channel when the melt leaves the die. By shortening the longitudinal length of the flow distribution die seat, the die can prevent the melt from staying in the flow distribution die seat for too long to form internal stress of the melt. By increasing the volume of the second straight channel formed between the flow distribution shuttle and the die seat, the melt can quickly pass through the flow distribution shuttle to avoid forming excessive back pressure. The die can avoid the sharp change of the channel size when the melt leaves the die, reduce the die swelling force of the melt, improve the product quality and production stability, and has compact structure, simple production operation, which can improve the product yield while ensuring the product quality.

[0004] The wire tube die of the above-mentioned prior art has poor continuous forming performance of the wire tube during use, cannot continuously process and form the wire tube, has low efficiency, and needs to use core pulling method to complete the wire tube forming process. This method needs to frequently move the piston, which not only consumes a lot of energy for a long time, increases the production cost, cannot continuously extrude the wire tube, is not convenient to use, and cannot directly print the outer wall of the wire tube during the extrusion process. It needs to be matched with subsequent printing equipment, and the overall performance and versatility are not good. SUMMARY

[0005] The present application aims to provide a plastic wire tube extrusion molding die with a groove-shaped outer tube wall structure and a molding method thereof, to solve the problems of the wire tube molding die in the background art, such as insufficient molding continuity of the wire tube, inability to continuously process the wire tube, low efficiency, and the need to use a core-pulling method to complete the wire tube molding process, which requires frequent piston movement, consumes a lot of energy for a long time, increases production costs, cannot continuously extrude the wire tube, is not convenient to use, and cannot directly print the outer wall of the wire tube during the extrusion process, but needs to be combined with subsequent printing equipment, and the overall integrity and versatility are not good.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a plastic wire tube extrusion molding die with a groove-shaped outer tube wall structure, comprising a refrigeration box, a main control cover, a machine box, a spiral feeding extrusion cylinder, a processing table, a cold air box, an electric push rod, an embossing plate, an outer wall molding die, and a plastic wire tube molding cylinder, the spiral feeding extrusion cylinder is provided with the plastic wire tube molding cylinder and a first motor at both ends, the first motor is connected with a mounting pad through a reduction box, the bottom of the mounting pad is connected with a guide clamping plate and a guide groove guide clamping plate in the middle of the top of the processing table through the guide clamping plate, and a guide ear in the middle of the guide clamping plate is connected with a screw rod transmission in the middle of the guide groove, the cold air box is clamped with the plastic wire tube molding cylinder through a heat exchange port in the inner side, one end of the plastic wire tube molding cylinder is provided with the outer wall molding die, one end of the outer wall molding die is provided with the embossing plate, the bottom of the refrigeration box is provided with the main control cover, and one side of the bottom of the main control cover is connected with a baffle on one side of the top of the processing table.

[0007] Preferably, the processing table is arranged on the top of the machine box, the machine box is provided with a maintenance box in the middle, the machine box is provided with a waterproof insulation table at the bottom, the bottom of the waterproof insulation table is provided with a support base, one side of the waterproof insulation table is provided with a side table plate, and the top of the side table plate is provided with a lower guide wheel.

[0008] Preferably, the processing table is arranged on the top of the machine box, the machine box is provided with a maintenance box in the middle, the machine box is provided with a waterproof insulation table at the bottom, the bottom of the waterproof insulation table is provided with a support base, one side of the waterproof insulation table is provided with a side table plate, and the top of the side table plate is provided with a lower guide wheel.

[0009] Preferably, the spiral feeding extrusion cylinder comprises a feeding hopper, a hoop, an injection joint, a spiral feeding rod, and an electric heating coil; The feeding hopper is arranged on one side of the top of the spiral feeding extrusion cylinder, the hoop is arranged on the outer side of the spiral feeding extrusion cylinder close to one end, the bottom of the hoop is connected with the mounting pad, the spiral feeding rod is arranged in the middle of the spiral feeding extrusion cylinder, and the end thereof is connected with the output shaft of the first motor, the electric heating coil is arranged on the inner cavity side wall of the spiral feeding extrusion cylinder and is intelligently controlled by the control panel on the surface of the spiral feeding extrusion cylinder.

[0010] Preferably, the top of the cold box is provided with a latch on both sides, and the latch is connected with the refrigeration box through the flow guide pipe.

[0011] Preferably, the plastic wire tube forming cylinder comprises an electromagnetic coil, a magnetic suspension mandrel, a limiting plate and a connecting plate. The electromagnetic coil is arranged on the inner side wall of the plastic wire tube forming cylinder, the magnetic suspension mandrel is arranged in the middle of the plastic wire tube forming cylinder, the magnetic suspension mandrel is balanced with the electromagnetic field generated by the electromagnetic coil, so that the magnetic suspension mandrel is always suspended in the middle of the plastic wire tube forming cylinder, the outer layer of the electromagnetic coil is provided with a heat insulation layer, the limiting plate is arranged at the port of the plastic wire tube forming cylinder, two connecting plates symmetrically arranged on one side of the limiting plate, and the output end of the main control cover is electrically connected with the input end of the electromagnetic coil.

[0012] Preferably, the outer wall forming die comprises a hollow screw head and a protruding tooth. The hollow screw head is arranged at the end of the outer wall forming die and is threadedly connected with the end of the plastic wire tube forming cylinder, and a plurality of protruding teeth are uniformly arranged on the inner side wall of the outer wall forming die and are formed as an integral structure with the outer wall forming die.

[0013] Preferably, it further comprises an embossing plate, two embossing plates are symmetrically arranged, the inner side wall of the embossing plate is provided with a plurality of printing balls, the back surface of the embossing plate is connected with the telescopic end of the electric push rod, and the cylinder end of the electric push rod is connected with the connecting plate.

[0014] Preferably, the end of the screw rod is provided with a driven gear, one side of the gear transmission box plate at the end of the processing table is provided with a second motor, the output shaft end of the second motor is provided with a driving gear, and the driving gear is in transmission cooperation with the driven gear.

[0015] A plastic wire tube extrusion forming method with a groove-shaped outer pipe wall structure, comprising the following steps: 1) The plastic wire tube forming slurry is added into the screw feeding extrusion cylinder by the feeding hopper, the slurry is heated by the electric heating coil to maintain a constant temperature state, and the first motor controls the rotation of the screw feeding rod to send the slurry into the plastic wire tube forming cylinder; 2) The electromagnetic coil is controlled by the main control cover, the current is automatically adjusted according to the change of the magnetic field, so that the magnetic suspension mandrel is always suspended in the middle of the plastic wire tube forming cylinder, the slurry is extruded in the plastic wire tube forming cylinder, the cold air tank is cooled by the refrigeration tank, then the cold air tank is rapidly cooled and formed, the plastic wire tube is extruded into the outer wall forming die, and the outer pipe wall of the plastic wire tube is processed into a corresponding groove-shaped structure by the protruding teeth on the inner side wall of the outer wall forming die; 3) According to the stamping requirement, different types of outer wall forming die can be replaced, and the outer wall of the plastic wire pipe can be stamped by the embossing plate controlled by the electric push rod, the plastic wire pipe is continuously extruded after stamping, and the plastic wire pipe is changed and guided out through the upper guide wheel controlled by the hydraulic rod, and then guided out through the lower guide wheel.

[0016] Compared with the prior art, the beneficial effects of the present application are: The end of the spiral feeding extrusion cylinder is provided with a plastic wire pipe forming cylinder, and the two are assembled and used, so that the extruded slurry can be directly processed, and a cold air box is arranged outside the plastic wire pipe forming cylinder, which can cool and form the wire pipe in the plastic wire pipe forming cylinder in time, effectively improving the efficiency.

[0017] The inner wall of the plastic wire pipe forming cylinder is provided with an electromagnetic coil, and a magnetic suspension core rod is arranged in the middle of the electromagnetic coil. The electromagnetic coil can be intelligently controlled by the main control cover, so that the magnetic suspension core rod can be automatically controlled to always keep the center of the cylinder suspended, so that the wire pipe can be directly formed during the extrusion process. It is not only convenient to use, but also can be continuously processed without interruption, and the efficiency is high.

[0018] The end of the plastic wire pipe forming cylinder is provided with an outer wall forming die, and the outer wall forming die can be disassembled and replaced. The outer wall forming die can make the plastic wire pipe have a groove-shaped outer pipe wall structure through the teeth inside the outer wall forming die, increase the functionality, and facilitate replacement of the die according to requirements. It is convenient to use, in order to meet different stamping requirements, an embossing plate controlled by an electric push rod is installed on one side, and the outer wall of the plastic wire pipe can be embossed and formed by the embossing plate. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The structure of the present application is shown in the figure; Figure 2 The structure of the plastic wire pipe extrusion forming die of the present application is shown in the figure; Figure 3 The front view of the present application is shown in the figure; Figure 4 The front view of the plastic wire pipe extrusion forming die of the present application is shown in the figure; Figure 5 The structure of the inside of the spiral feeding extrusion cylinder of the present application is shown in the figure; Figure 6 The structure of the inside of the plastic wire pipe forming cylinder of the present application is shown in the figure; Figure 7 The top view of the processing table of the present application is shown in the figure; Figure 8 The front view of the embossing plate of the present application is shown in the figure; Figure 9 The cross-sectional view of the outer wall forming die of the present application is shown in the figure; Figure 10 Front view of the sleeve of the present application.

[0020] In the figure: 1, refrigeration box; 2, main control cover; 3, hydraulic rod; 4, upper guide wheel; 5, baffle; 6, plastic wire tube; 7, machine box; 8, lower guide wheel; 9, side platform; 10, maintenance box; 11, support base; 12, waterproof insulation platform; 13, spiral feeding extrusion cylinder; 14, gear transmission box plate; 15, processing platform; 16, feeding hopper; 17, sleeve; 18, speed reducer; 19, first motor; 20, guide clamping plate; 21, mounting pad plate; 22, heat exchange port; 23, cold air box; 24, connecting plate; 25, electric push rod; 26, embossing plate; 27, outer wall forming die; 28, plastic wire tube forming cylinder; 29, limiting plate; 30, spiral feeding rod; 31, electric heating coil; 32, injection joint; 33, electromagnetic coil; 34, magnetic suspension mandrel; 35, printed ball; 36, protruding teeth; 37, second motor; 38, guide groove; 39, screw. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all.

[0022] Please refer to Figures 1-10 The embodiment discloses a plastic wire tube extrusion forming die with a groove-shaped outer pipe wall structure, which comprises a refrigeration box 1, a main control cover 2, a machine box 7, a spiral feeding extrusion cylinder 13, a processing platform 15, a cold air box 23, an electric push rod 25, an embossing plate 26, an outer wall forming die 27 and a plastic wire tube forming cylinder 28. The two ends of the spiral feeding extrusion cylinder 13 are respectively provided with the plastic wire tube forming cylinder 28 and the first motor 19. The first motor 19 is connected with the mounting pad plate 21 through the speed reducer 18. The bottom of the mounting pad plate 21 is guided by the guide clamping plate 20 and the guide groove 38 in the middle of the top end of the processing platform 15. The middle guide lug of the guide clamping plate 20 is in threaded transmission connection with the screw 39 in the middle of the guide groove 38. The cold air box 23 is clamped and fixed with the plastic wire tube forming cylinder 28 through the heat exchange port 22 in the inner side of the cold air box 23. One end of the plastic wire tube forming cylinder 28 is provided with the outer wall forming die 27. One end of the outer wall forming die 27 is provided with the embossing plate 26. The bottom of the refrigeration box 1 is provided with the main control cover 2. One side of the bottom of the main control cover 2 is connected with the baffle 5 on one side of the top of the processing platform 15.

[0023] The slurry is automatically extruded by the spiral feeding extrusion barrel 13. The spiral feeding rod 30 is driven to rotate by the first motor 19. The spiral feeding extrusion barrel 13 can be adjusted in the transverse position by the guide clamping plate 20 moving on the guide groove 38. The cold air tank 23 can exchange heat with the plastic wire pipe forming barrel 28 through the heat exchange port 22. The outer wall of the formed wire pipe is embossed by the embossing plate 26. The main control cover 2 is convenient for intelligent control of the equipment.

[0024] Further, the processing table 15 is arranged at the top of the machine box 7. The machine box 7 is provided with a maintenance box 10 in the middle. The machine box 7 is provided with a waterproof insulation table 12 at the bottom. The bottom of the waterproof insulation table 12 is provided with a support base 11. The waterproof insulation table 12 is provided with a side table plate 9 on one side. The top of the side table plate 9 is provided with a lower guide wheel 8.

[0025] The maintenance box 10 is convenient for maintenance and operation of the machine box 7. The support base 11 is used to stably support the equipment. The lower guide wheel 8 is convenient for guiding the formed wire pipe out.

[0026] Further, the hydraulic rod 3 is also included. The cylinder end of the hydraulic rod 3 is connected with the baffle 5. The telescopic end of the hydraulic rod 3 is provided with an upper guide wheel 4.

[0027] The upper guide wheel 4 controls the wire pipe to be limited and guided out by the hydraulic rod 3.

[0028] Further, the spiral feeding extrusion barrel 13 includes a feeding hopper 16, a sleeve 17, an injection joint 32, a spiral feeding rod 30 and an electric heating coil 31. The feeding hopper 16 is arranged at the top of one side of the spiral feeding extrusion barrel 13. The sleeve 17 is arranged at the outside of the spiral feeding extrusion barrel 13 near one end. The bottom of the sleeve 17 is connected with the mounting pad 21. The spiral feeding rod 30 is arranged in the middle of the spiral feeding extrusion barrel 13. The end of the spiral feeding rod 30 is connected with the output shaft of the first motor 19. The electric heating coil 31 is arranged on the inner cavity side wall of the spiral feeding extrusion barrel 13 and is intelligently controlled by the control panel on the surface of the spiral feeding extrusion barrel 13.

[0029] The feeding hopper 16 is convenient for feeding into the spiral feeding extrusion barrel 13. The sleeve 17 is used to connect the spiral feeding extrusion barrel 13 with the mounting pad 21. The electric heating coil 31 can control the temperature of the slurry in the spiral feeding extrusion barrel 13.

[0030] Further, the top of the cold air tank 23 is provided with a latch on both sides. The latch is connected with the refrigeration tank 1 through a flow guide pipe. This design can make the refrigeration tank 1 deliver cold air to the cold air tank 23.

[0031] Further, the plastic wire tube forming cylinder 28 comprises an electromagnetic coil 33, a magnetic suspension mandrel 34, a limiting plate 29 and a connecting plate 24; the electromagnetic coil 33 is arranged on the inner side wall of the plastic wire tube forming cylinder 28, the magnetic suspension mandrel 34 is arranged in the middle of the plastic wire tube forming cylinder 28, the magnetic suspension mandrel 34 is balanced with the electromagnetic field generated by the electromagnetic coil 33, so that the magnetic suspension mandrel 34 is always suspended in the middle of the plastic wire tube forming cylinder 28, and the outer layer of the electromagnetic coil 33 is provided with a heat insulation layer, the limiting plate 29 is arranged at the port of the plastic wire tube forming cylinder 28, and the two connecting plates 24 arranged symmetrically are arranged on one side of the limiting plate 29, and the output end of the main control cover 2 is electrically connected with the input end of the electromagnetic coil 33.

[0032] The current of the electromagnetic coil 33 is automatically controlled by the main control cover 2, so that the electromagnetic coil 33 generates a control magnetic field to suspend the magnetic suspension mandrel 34, so that the magnetic suspension mandrel 34 is always located in the middle of the plastic wire tube forming cylinder 28, and the extrusion forming of the auxiliary wire tube is assisted.

[0033] Further, the outer wall forming die 27 comprises a hollow screw head and a plurality of protrusions 36.

[0034] The hollow screw head is arranged at the end of the outer wall forming die 27 and is threadedly connected with the end of the plastic wire tube forming cylinder 28, and the plurality of protrusions 36 are uniformly arranged on the inner side wall of the outer wall forming die 27 and are integrally formed with the outer wall forming die 27.

[0035] The hollow screw head facilitates the communication between the outer wall forming die 27 and the inner cavity of the plastic wire tube forming cylinder 28.

[0036] Further, it further comprises an embossing plate 26, two embossing plates 26 are arranged symmetrically, the inner side wall of the embossing plate 26 is provided with a plurality of printing balls 35, the back surface of the embossing plate 26 is connected with the telescopic end of the electric push rod 25, and the cylinder end of the electric push rod 25 is connected with the connecting plate 24.

[0037] The embossing plate 26 is used for embossing the outer wall of the wire tube, and the electric push rod 25 is used for stamping control of the embossing plate 26.

[0038] Further, the end of the screw rod 39 is provided with a driven gear, one side of the gear transmission box plate 14 at the end of the processing table 15 is provided with a second motor 37, the output shaft end of the second motor 37 is provided with a driving gear, and the driving gear is in transmission cooperation with the driven gear, the driving gear is driven to rotate by the second motor 37, so that the driving gear and the driven gear are in gear transmission, and the screw rod 39 is driven to rotate.

[0039] A plastic wire tube extrusion forming method with a groove-shaped outer pipe wall structure comprises the following steps: 1) The plastic wire tube forming slurry is added into the spiral feeding extrusion cylinder 13 by the feeding hopper 16, the slurry is heated by the electric heating coil 31 to maintain a constant temperature, the first motor 19 controls the rotation of the spiral feeding rod 30 to send the slurry into the plastic wire tube forming cylinder 28; 2) The electromagnetic coil 33 is controlled by the main control cover 2, the current is automatically adjusted according to the change of the magnetic field, so that the magnetic suspension mandrel 34 is always suspended in the middle of the plastic wire tube forming cylinder 28, during the extrusion of the slurry in the plastic wire tube forming cylinder 28, the cold air tank 23 is cooled by the refrigeration tank 1, then the cold air tank 23 is quickly cooled to form the plastic wire tube 6, the outer wall of the plastic wire tube 6 is processed into a corresponding groove structure by the convex teeth 36 on the inner wall of the outer wall forming die 27; 3) According to the printing requirements, different types of outer wall forming dies 27 can be replaced, or the embossing plate 26 can be controlled by the electric push rod 25 to print the outer wall of the plastic wire tube 6, the plastic wire tube 6 is continuously extruded after printing, and the plastic wire tube 6 is guided out by the upper guide wheel 4 controlled by the hydraulic rod 3, and then guided out by the lower guide wheel 8.

[0040] Working principle: When the device is in use, the plastic wire tube forming slurry is added into the spiral feeding extrusion cylinder 13 by the feeding hopper 16, the slurry is heated by the electric heating coil 31 to maintain a constant temperature, the first motor 19 controls the rotation of the spiral feeding rod 30 to send the slurry into the plastic wire tube forming cylinder 28, the electromagnetic coil 33 is controlled by the main control cover 2, the current is automatically adjusted according to the change of the magnetic field, so that the magnetic suspension mandrel 34 is always suspended in the middle of the plastic wire tube forming cylinder 28, during the extrusion of the slurry in the plastic wire tube forming cylinder 28, the cold air tank 23 is cooled by the refrigeration tank 1, then the cold air tank 23 is quickly cooled to form the plastic wire tube 6, the outer wall of the plastic wire tube 6 is processed into a corresponding groove structure by the convex teeth 36 on the inner wall of the outer wall forming die 27, according to the printing requirements, different types of outer wall forming dies 27 can be replaced, or the embossing plate 26 can be controlled by the electric push rod 25 to print the outer wall of the plastic wire tube 6, the plastic wire tube 6 is continuously extruded after printing, and the plastic wire tube 6 is guided out by the upper guide wheel 4 controlled by the hydraulic rod 3, and then guided out by the lower guide wheel 8.

[0041] It will be apparent to those skilled in the art that the application is not limited to the details of the above-exemplified embodiments and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. The embodiments should therefore be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims with respect to the figures of the patent document.

Claims

1. A plastic conduit extrusion molding die with a grooved outer tube wall structure, comprising a refrigeration box (1), a main control cover (2), a machine housing (7), a spiral feeding extrusion cylinder (13), a processing table (15), a cold air box (23), an electric push rod (25), an embossing plate (26), an outer wall molding die (27), and a plastic conduit molding cylinder (28), characterized in that: The two ends of the spiral feeding extrusion cylinder (13) are respectively provided with the plastic wire tube forming cylinder (28) and the first motor (19). The first motor (19) is connected to the mounting pad (21) through the gearbox (18). The bottom of the mounting pad (21) is guided by the guide plate (20) and the guide groove (38) in the middle of the top of the processing table (15). The guide ear in the middle of the guide plate (20) is connected to the screw (39) in the middle of the guide groove (38) for screw drive. The cold air box (23) is fixed to the plastic wire tube forming cylinder (28) through the heat exchange port (22) on its inner side. One end of the plastic wire tube forming cylinder (28) is provided with the outer wall forming mold (27). One end of the outer wall forming mold (27) is provided with the embossing plate (26). The bottom of the refrigeration box (1) is provided with the main control cover (2). One side of the bottom of the main control cover (2) is connected to the baffle (5) on the top side of the processing table (15).

2. The plastic conduit extrusion molding die with a grooved outer tube wall structure according to claim 1, characterized in that: The processing table (15) is located on the top of the chassis (7). The middle part of the chassis (7) is provided with a maintenance box (10). The bottom of the chassis (7) is provided with a waterproof insulating table (12). The bottom of the waterproof insulating table (12) is provided with a support base (11). One side of the waterproof insulating table (12) is provided with a side plate (9). The top of the side plate (9) is provided with a lower guide wheel (8).

3. The plastic conduit extrusion molding die with a grooved outer tube wall structure according to claim 1, characterized in that: It also includes a hydraulic rod (3), the cylinder end of which is connected to a baffle (5), and the telescopic end of the hydraulic rod (3) is provided with an upper guide wheel (4).

4. The plastic conduit extrusion molding die with a grooved outer tube wall structure according to claim 1, characterized in that: The spiral feeding extrusion cylinder (13) includes a feeding hopper (16), a sleeve (17), an injection joint (32), a spiral feeding rod (30), and an electric heating coil (31). The feeding hopper (16) is located on the top side of the spiral feeding extrusion cylinder (13). The sleeve (17) is located on the outside of the spiral feeding extrusion cylinder (13) near one end. The bottom of the sleeve (17) is connected to the mounting plate (21). The spiral feeding rod (30) is located in the middle of the spiral feeding extrusion cylinder (13), and its end is connected to the output shaft of the first motor (19). The electric heating coil (31) is located on the inner wall of the spiral feeding extrusion cylinder (13) and is intelligently electrically controlled by the control panel on the surface of the spiral feeding extrusion cylinder (13).

5. The plastic conduit extrusion molding die with a grooved outer tube wall structure according to claim 1, characterized in that: The top two sides of the cold air box (23) are provided with pins, and the pins are connected to the refrigeration box (1) through the guide pipe.

6. The plastic conduit extrusion molding die with a grooved outer tube wall structure according to claim 1, characterized in that: The plastic tubing forming cylinder (28) includes an electromagnetic coil (33), a magnetic levitation core rod (34), a limiting plate (29), and a connecting plate (24). The electromagnetic coil (33) is located on the inner wall of the plastic tube forming cylinder (28), and the magnetic levitation core rod (34) is located in the middle of the plastic tube forming cylinder (28). The electromagnetic field generated by the magnetic levitation core rod (34) and the electromagnetic coil (33) is balanced, so that the magnetic levitation core rod (34) is always suspended in the middle of the plastic tube forming cylinder (28). The outer layer of the electromagnetic coil (33) is provided with a heat insulation layer. The limiting plate (29) is located at the port of the plastic tube forming cylinder (28). Two symmetrically arranged connecting plates (24) are located on one side of the limiting plate (29). The output end of the main control cover (2) is electrically connected to the input end of the electromagnetic coil (33).

7. The plastic conduit extrusion molding die with a grooved outer tube wall structure according to claim 1, characterized in that: The outer wall forming mold (27) includes a hollow screw head and a toothed protrusion (36); The hollow screw head is located at the end of the outer wall forming mold (27) and is threadedly connected to the end of the plastic tube forming cylinder (28). Multiple protruding teeth (36) are evenly distributed on the inner sidewall of the outer wall forming mold (27) and are integrated with the outer wall forming mold (27).

8. The plastic conduit extrusion die with a grooved outer tube wall structure according to claim 1, characterized in that: It also includes an embossing plate (26), two embossing plates (26) are symmetrically arranged, the inner sidewall of the embossing plate (26) is covered with a plurality of printed balls (35), the back of the embossing plate (26) is connected to the telescopic end of the electric push rod (25) at the center, and the cylinder end of the electric push rod (25) is connected to the connecting plate (24).

9. A plastic conduit extrusion molding die with a grooved outer tube wall structure according to claim 1, characterized in that: The end of the screw (39) is provided with a driven gear, and a second motor (37) is provided on one side of the gear transmission box plate (14) at the end of the processing table (15). The output shaft end of the second motor (37) is provided with a driving gear, and the driving gear and the driven gear are in transmission cooperation.

10. A method for extruding a plastic conduit with a grooved outer tube wall structure, implemented based on an extrusion die for a plastic conduit with a grooved outer tube wall structure according to any one of claims 1 to 9, characterized in that, Includes the following steps: 1) The plastic tube forming slurry is added into the screw feeding extrusion cylinder (13) by the feeding hopper (16). The slurry is heated by the electric heating coil (31) to maintain a constant temperature. The first motor (19) controls the screw feeding rod (30) to rotate so that it feeds the slurry into the plastic tube forming cylinder (28). 2) The electromagnetic coil (33) is controlled by the main control cover (2), and the current is automatically adjusted according to the change of the magnetic field so that the magnetic levitation core rod (34) is always suspended in the middle of the plastic tube forming cylinder (28). During the extrusion process of the slurry in the plastic tube forming cylinder (28), the cold air is transported to the cold air box (23) through the refrigeration box (1), and then the cold air box (23) rapidly cools and shapes it, so that the plastic tube (6) is squeezed into the outer wall forming mold (27). The outer tube wall of the plastic tube (6) is processed into the corresponding groove structure by the protrusion teeth (36) on the inner side wall of the outer wall forming mold (27). 3) Depending on the printing requirements, different types of outer wall forming molds (27) can be replaced. Alternatively, the embossing plate (26) can be controlled by the electric push rod (25) to print on the outer wall of the plastic tube (6). After printing, the plastic tube (6) is continuously extruded, and the upper guide wheel (4) is controlled by the hydraulic rod (3) to change direction and export the plastic tube (6). Then, the lower guide wheel (8) assists in exporting.

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