Plastic pipe processing device

Abstract

The invention discloses a plastic pipe machining device, and belongs to the field of plastic pipe machining. A plastic pipe processing device comprises an extrusion pipe, a forming pipe and a feed hopper, the forming pipe is fixed to the end of the extrusion pipe, the feed hopper is fixed to the top of the extrusion pipe, the extrusion pipe is communicated with an inner cavity of the forming pipe, an extrusion packing auger is rotationally connected into the extrusion pipe, the feed hopper is communicated with the inner cavity of the extrusion pipe, and the forming pipe is fixed to the top of the extrusion pipe. A material sealing part is arranged at the communicating part of the feeding hopper and the extrusion molding pipe; the machine further comprises a stirring mechanism, a trowelling assembly and a bubble sucking assembly. Through rotation of a second friction ring and a first friction ring and cooperation of friction force, an outer trowelling ring and an inner trowelling ring can rotate at the same time, so that friction trowelling is conducted on the inner wall and the outer wall of a primarily-formed plastic pipe, the smoothness of the inner wall and the outer wall of the plastic pipe is effectively improved, and the machining quality of the plastic pipe is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of plastic pipe processing, in particular to a plastic pipe processing device. Background Art

[0002] Plastic pipes are generally made of synthetic resin, that is, polyester, with stabilizers, lubricants, plasticizers, etc., and are made by extrusion molding. Plastic pipes can generally be made of PVC particles as raw materials, and currently, in order to meet the needs of green and energy-saving development, recycled waste plastic particles can also be used as raw materials for processing and production.

[0003] At present, during the extrusion process of plastic pipes, burrs or hollows may appear on the inner and outer walls of the initially formed plastic pipes, thereby reducing the final output quality of the plastic pipes; and a certain amount of bubbles will be mixed in the slurry after the plastic is melted. After these bubbles accompany the slurry, they will cause hollows on the surface or inside of the plastic pipes, thereby reducing the processing quality of the plastic pipes. Therefore, a plastic pipe processing device is proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that burrs or hollows will appear on the inner and outer walls of the formed plastic pipe, and bubbles mixed in the slurry will cause holes on the surface or inside of the plastic pipe, which ultimately leads to reduced processing quality of the plastic pipe, and to propose a plastic pipe processing device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A plastic pipe processing device comprises an extrusion pipe, a molding pipe and a feeding hopper, wherein the molding pipe is fixed at the end of the extrusion pipe, the feeding hopper is fixed at the top of the extrusion pipe, the extrusion pipe is connected to the inner cavity of the molding pipe, and an extrusion auger is rotatably connected in the extrusion pipe, the feeding hopper is connected to the inner cavity of the extrusion pipe, and a sealing part is arranged at the connection between the feeding hopper and the extrusion pipe, and also comprises: a stirring mechanism, the stirring mechanism is arranged in the feeding hopper, and the stirring mechanism is used to stir the plastic melt in the feeding hopper; a smoothing component, the smoothing component is arranged in the molding pipe, and the smoothing component is used to smooth the inner and outer walls of the preliminarily formed plastic pipe; and a bubble suction component, the bubble suction component is arranged on the molding pipe, and the bubble suction component is used to discharge bubbles contained in the plastic melt in the feeding hopper.

[0007] In order to facilitate loading and unloading of materials, preferably, the sealing part includes a sealing bin, which is fixed on the top of the extrusion tube, and the sealing bin is respectively connected to the extrusion tube and the inner cavity of the feed hopper, a sealing plate is slidably connected in the sealing bin, an electric push rod is fixedly connected to the outer wall of the sealing bin, and the telescopic end of the electric push rod passes through the sealing bin and is fixedly connected to the side wall of the sealing plate.

[0008] In order to improve the processing quality of plastic pipes, preferably, the stirring mechanism includes a driven shaft, which is rotatably connected to the bottom of the inner cavity of the feed hopper, and the top of the inner cavity of the feed hopper is rotatably connected to a stirring shaft, and the outer wall of the stirring shaft is fixedly connected to a stirring paddle, and the bottom end of the stirring shaft and the outer wall of the driven shaft are connected by a bevel gear set, and a protective shell is sleeved on the outside of the bevel gear set, and the protective shell is rotatably connected to the driven shaft and the stirring shaft, and the protective shell is fixedly connected to the inner wall of the feed hopper, and a driving motor is fixedly connected to the bottom side wall of the extruded tube, and the output shaft of the driving motor, the driven shaft and the end of the rotating shaft of the extrusion auger are connected by a pulley set.

[0009] Furthermore, three groups of stirring paddles are arranged at equal intervals along the outer wall of the stirring shaft, the lengths of the three groups of stirring paddles increase from bottom to top, and the inclination directions of two adjacent groups of stirring paddles are opposite.

[0010] In order to improve the molding quality of plastic pipes, preferably, the smoothing assembly includes an outer smoothing ring and an inner smoothing ring, an outer smoothing groove is opened on the inner wall of the molding tube, the outer smoothing ring is rotatably connected in the outer smoothing groove, and the outer wall of the outer smoothing ring is flush with the inner wall of the molding tube, the driven shaft extends through the outer smoothing groove and is fixedly connected with a first friction ring, and the first friction ring rotates in fit with the outer side wall of the outer smoothing ring.

[0011] Furthermore, an inner smoothing groove is provided on the inner core rod of the forming tube, the inner smoothing ring is rotatably connected in the inner smoothing groove, and the outer wall of the inner smoothing ring is flush with the outer wall of the inner core rod of the forming tube, the rotating shaft of the extrusion auger passes through the inner smoothing groove and is fixedly connected with a second friction ring, and the second friction ring rotates in fit with the inner side wall of the inner smoothing ring.

[0012] In order to improve the production quality of plastic tubes, preferably, the bubble suction component includes a piston box, which is fixed on the top of the forming tube, and the inner cavity of the piston box is connected with the inner cavity of the outer smoothing groove, an upper magnetic plate is slidably connected in the piston box, a return spring is fixedly connected between the top of the upper magnetic plate and the inner wall of the piston box, lower magnetic plates are fixedly connected on both sides of the first friction ring, the lower magnetic plate and the upper magnetic plate are magnetically mutually connected, an exhaust pipe is fixed on and connected to the side wall of the piston box, the other end of the exhaust pipe is connected to the top of the inner cavity of the feed hopper, and a one-way valve is arranged in the exhaust pipe.

[0013] Furthermore, an exhaust pipe is fixed and connected to the side wall of the piston box, the other end of the exhaust pipe is connected to the inner cavity of the outer smoothing groove, and a one-way valve is arranged in the exhaust pipe, and a pressure relief pipe is fixedly connected to the side wall of the bottom of the outer smoothing groove, and a pressure valve is arranged in the pressure relief pipe.

[0014] Preferably, the friction between the first friction ring and the outer smoothing ring is greater than the friction between the outer smoothing ring and the outer wall of the initially formed plastic tube, and the friction between the second friction ring and the inner smoothing ring is greater than the friction between the inner smoothing ring and the inner wall of the initially formed plastic tube.

[0015] Preferably, the repulsive force between the lower magnetic plate and the upper magnetic plate is greater than the thrust required for the retraction of the return spring.

[0016] Compared with the prior art, the present invention provides a plastic pipe processing device having the following

[0017] Beneficial effects:

[0018] 1. The plastic pipe processing device rotates the second friction ring and the first friction ring, and cooperates with the friction force to make the outer smoothing ring and the inner smoothing ring rotate at the same time, so as to frictionally smooth the inner and outer walls of the initially formed plastic pipe, effectively improving the smoothness of the inner and outer walls of the plastic pipe and ensuring the processing quality of the plastic pipe.

[0019] 2. The plastic pipe processing device will continuously draw in the gas in the feed hopper through the repulsive action of the lower magnetic plate and the upper magnetic plate, thereby reducing the air pressure in the feed hopper, allowing the bubbles in the plastic melt to float up and be discharged quickly, effectively improving the use effect of the plastic melt and ensuring the processing quality of the plastic pipe.

[0020] 3. The plastic pipe processing device guides the hot air flow sucked from the feed hopper into the outer smoothing groove to preheat the outer smoothing ring so as to smooth the initially formed plastic pipe, thereby further improving the processing quality of the plastic pipe.

[0021] 4. The plastic pipe processing device simultaneously rotates the driven shaft, the stirring shaft and the stirring paddle in the feed hopper to stir the plastic melt, thereby ensuring uniform mixing of the internal components, thereby effectively improving the processing quality of the plastic pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The overall structure of a plastic pipe processing device proposed by the present invention is shown in FIG. Figure 1 ;

[0023] Figure 2 The overall structure of a plastic pipe processing device proposed by the present invention is shown in FIG. Figure 2 ;

[0024] Figure 3 A side view half-section structure schematic diagram of a plastic pipe processing device proposed by the present invention;

[0025] Figure 4 A plastic pipe processing device proposed by the present invention Figure 3A schematic diagram of the enlarged structure of the middle A area;

[0026] Figure 5 A plastic pipe processing device proposed by the present invention Figure 3 Schematic diagram of the enlarged structure of the middle B area;

[0027] Figure 6 A schematic diagram of a partial cross-sectional structure of a forming pipe of a plastic pipe processing device proposed by the present invention;

[0028] Figure 7 A schematic diagram of the internal half-section structure of a feeding hopper of a plastic pipe processing device proposed by the present invention;

[0029] Figure 8 A plastic pipe processing device proposed by the present invention Figure 7 Schematic diagram of the enlarged structure of the middle C area.

[0030] In the figure: 1. extrusion tube; 2. forming tube; 3. feeding hopper; 4. extrusion auger; 5. sealing bin; 51. sealing plate; 52. electric push rod; 6. driven shaft; 61. stirring shaft; 62. stirring paddle; 63. bevel gear set; 631. protective shell; 64. driving motor; 65. pulley set; 7. outer smoothing ring; 71. inner smoothing ring; 72. outer smoothing groove; 721. first friction ring; 73. inner smoothing groove; 731. second friction ring; 8. piston box; 81. upper magnetic plate; 82. reset spring; 83. lower magnetic plate; 84. exhaust pipe; 85. exhaust pipe; 86. pressure relief pipe. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] Embodiment 1:

[0034] Reference Figure 1-Figure 8A plastic pipe processing device comprises an extrusion pipe 1, a forming pipe 2 and a feeding hopper 3, wherein the forming pipe 2 is fixed at the end of the extrusion pipe 1, the feeding hopper 3 is fixed at the top of the extrusion pipe 1, the extrusion pipe 1 is connected to the inner cavity of the forming pipe 2, and an extrusion auger 4 is rotatably connected in the extrusion pipe 1, the feeding hopper 3 is connected to the inner cavity of the extrusion pipe 1, and a sealing part is arranged at the connection between the feeding hopper 3 and the extrusion pipe 1, and also comprises: a stirring mechanism, the stirring mechanism is arranged in the feeding hopper 3, and the stirring mechanism is used to stir the plastic melt in the feeding hopper 3; a smoothing component, the smoothing component is arranged in the forming pipe 2, and the smoothing component is used to smooth the inner and outer walls of the preliminarily formed plastic pipe; a bubble suction component, the bubble suction component is arranged on the forming pipe 2, and the bubble suction component is used to discharge the bubbles contained in the plastic melt in the feeding hopper 3.

[0035] Reference Figure 7 , Figure 8 The sealing part includes a sealing bin 5, which is fixed on the top of the extrusion tube 1 and communicated with the inner cavity of the extrusion tube 1 and the feeding hopper 3 respectively. A sealing plate 51 is slidably connected in the sealing bin 5, and an electric push rod 52 is fixedly connected to the outer wall of the sealing bin 5. The telescopic end of the electric push rod 52 penetrates into the sealing bin 5 and is fixedly connected to the side wall of the sealing plate 51. By turning on the electric push rod 52, the sealing plate 51 is pulled to move so as to open or close the connection between the feeding hopper 3 and the extrusion tube 1, thereby improving the convenience of loading and unloading.

[0036] Reference Figure 3 , Figure 5 and Figure 7 The stirring mechanism includes a driven shaft 6, which is rotatably connected to the bottom of the inner cavity of the feeding hopper 3, and a stirring shaft 61 is rotatably connected to the top of the inner cavity of the feeding hopper 3. A stirring paddle 62 is fixedly connected to the outer wall of the stirring shaft 61. The bottom end of the stirring shaft 61 is connected to the outer wall of the driven shaft 6 through a bevel gear set 63, and a protective shell 631 is sleeved on the outer side of the bevel gear set 63. The protective shell 631 is rotatably connected to the driven shaft 6 and the stirring shaft 61. The protective shell 631 is fixedly connected to the inner wall of the feeding hopper 3. A driving motor 64 is fixedly connected to the bottom side wall of the extrusion tube 1. The output shaft of the driving motor 64, the driven shaft 6 and the end of the rotating shaft of the extrusion auger 4 are connected through a pulley set 65. Three groups of stirring paddles 62 are arranged at equal intervals along the outer wall of the stirring shaft 61. The lengths of the three groups of stirring paddles 62 increase from bottom to top, and the inclination directions of two adjacent groups of stirring paddles 62 are opposite.

[0037] By setting the above structure, the driving motor 64 is turned on to drive the driven shaft 6 to rotate through the pulley group 65, and the transmission effect of the bevel gear group 63 is cooperated, so that the stirring shaft 61 and the stirring paddle 62 can rotate in the feed hopper 3, so as to stir the plastic melt and ensure that the components inside are evenly mixed, thereby effectively improving the processing quality of the plastic pipe.

[0038] In addition, the distribution of the stirring paddles 62 can better achieve mixing of the plastic melt, thereby effectively improving the mixing effect.

[0039] Reference Figure 3 , Figure 4 and Figure 6 The smoothing assembly includes an outer smoothing ring 7 and an inner smoothing ring 71. An outer smoothing groove 72 is provided on the inner wall of the forming tube 2. The outer smoothing ring 7 is rotatably connected in the outer smoothing groove 72. The outer wall of the outer smoothing ring 7 is flush with the inner wall of the forming tube 2. The driven shaft 6 extends through the outer smoothing groove 72 and is fixedly connected with a first friction ring 721. The first friction ring 721 rotates in contact with the outer wall of the outer smoothing ring 7. An inner smoothing groove 73 is provided on the inner core rod of the forming tube 2. The inner smoothing ring 71 is rotatably connected in the inner smoothing groove 73. The outer wall of the inner smoothing ring 71 is flush with the outer wall of the inner core rod of the forming tube 2, the rotating shaft of the extrusion auger 4 passes through the inner smoothing groove 73 and is fixedly connected with the second friction ring 731, the second friction ring 731 rotates in fit with the inner wall of the inner smoothing ring 71; the friction force between the first friction ring 721 and the outer smoothing ring 7 is greater than the friction force between the outer smoothing ring 7 and the outer wall of the initially formed plastic tube, and the friction force between the second friction ring 731 and the inner smoothing ring 71 is greater than the friction force between the inner smoothing ring 71 and the inner wall of the initially formed plastic tube.

[0040] Through the arrangement of the above-mentioned structure, the stirring shaft 61 cooperates with the pulley group 65 to drive the extrusion auger 4 to rotate, so that the plastic melt is pushed and extruded into the molding tube 2 to form a plastic tube embryo. After the plastic tube embryo moves along the molding tube 2 for a period of time, it will be initially cooled to form a softer plastic tube. At this time, the rotating shaft of the extrusion auger 4 will drive the second friction ring 731 to rotate, and the driven shaft 6 will drive the first friction ring 721 to rotate. By utilizing the friction force, the outer smoothing ring 7 and the inner smoothing ring 71 will rotate at the same time, so as to frictionally smooth the inner and outer walls of the initially formed plastic tube, effectively improving the smoothness of the inner and outer walls of the plastic tube and ensuring the processing quality of the plastic tube.

[0041] Reference Figure 3-Figure 6The bubble suction component includes a piston box 8, which is fixed on the top of the forming tube 2, and the inner cavity of the piston box 8 is connected to the inner cavity of the outer smoothing groove 72. An upper magnetic plate 81 is slidably connected in the piston box 8, and a reset spring 82 is fixedly connected between the top of the upper magnetic plate 81 and the inner wall of the piston box 8. Both sides of the first friction ring 721 are fixedly connected with a lower magnetic plate 83, and the lower magnetic plate 83 and the upper magnetic plate 81 are magnetically mutually connected, and the repulsive force between the lower magnetic plate 83 and the upper magnetic plate 81 is greater than the reset spring. The thrust required for the retraction of the spring 82 is that an exhaust pipe 84 is fixed and connected to the side wall of the piston box 8, the other end of the exhaust pipe 84 is connected to the top of the inner cavity of the feed hopper 3, and a one-way valve is arranged in the exhaust pipe 84; an exhaust pipe 85 is fixed and connected to the side wall of the piston box 8, the other end of the exhaust pipe 85 is connected to the inner cavity of the outer smoothing groove 72, and a one-way valve is arranged in the exhaust pipe 85, and a pressure relief pipe 86 is fixedly connected to the side wall of the bottom of the outer smoothing groove 72, and a pressure valve is arranged in the pressure relief pipe 86.

[0042] It should be noted that the one-way valve in the exhaust pipe 84 can only allow the gas in the feed hopper 3 to move into the piston box 8; the one-way valve in the exhaust pipe 85 can only allow the gas in the piston box 8 to move into the external smoothing groove 72; the pressure valve in the pressure relief pipe 86 will only be pushed open when the air pressure in the external smoothing groove 72 exceeds a predetermined range.

[0043] Through the arrangement of the above structure, the driven shaft 6 will also drive the first friction ring 721 in the outer smoothing groove 72 to rotate, and the upper magnetic plate 81 will move upward by utilizing the repulsive effect between the lower magnetic plate 83 and the upper magnetic plate 81, thereby compressing the gas in the upper cavity of the piston box 8 and opening the one-way valve in the exhaust pipe 85, so that the gas in the piston box 8 enters the outer smoothing groove 72 along the exhaust pipe 85. After the lower magnetic plate 83 and the upper magnetic plate 81 are separated from the repulsive area, the upper magnetic plate 81 will be reset under the rebound effect of the reset spring 82, thereby generating a suction effect in the upper cavity of the piston box 8, thereby opening the exhaust pipe. The one-way valve in 84 allows the gas in the feed hopper 3 to enter the piston box 8 along the exhaust pipe 84, and so on. First, the air pressure in the feed hopper 3 will be reduced, and the rotation of the stirring paddle 62 will cause the bubbles in the plastic melt to float up and be discharged quickly, which effectively improves the use effect of the plastic melt, avoids the occurrence of voids in the formed plastic tube, and ensures the processing quality of the plastic tube. Secondly, the high-temperature airflow extracted from the feed hopper 3 can be sent to the external smoothing groove 72 to preheat the external smoothing ring 7 so as to smooth the initially formed plastic tube, further improving the processing quality of the plastic tube.

[0044] Reference Figure 1-Figure 8In the present invention, when in use, the plastic melt is poured into the feed hopper 3, and the driving motor 64 is turned on to drive the driven shaft 6 to rotate through the pulley group 65, and cooperate with the transmission effect of the bevel gear group 63, so that the stirring shaft 61 will rotate with the stirring paddle 62 in the feed hopper 3, so as to stir the plastic melt and ensure that the various components inside are evenly mixed, thereby effectively improving the processing quality of the plastic pipe; at the same time, the driven shaft 6 will also drive the first friction ring 721 in the outer smoothing groove 72 to rotate, and the repulsive effect between the lower magnetic plate 83 and the upper magnetic plate 81 will cause the upper magnetic plate 81 to move upward, thereby compressing the gas in the upper cavity of the piston box 8, and opening the one-way valve in the exhaust pipe 85, so that the gas in the piston box 8 enters the outer smoothing groove 7 along the exhaust pipe 85. 2, and after the lower magnetic plate 83 and the upper magnetic plate 81 are separated from the repulsive area, the upper magnetic plate 81 will be reset under the rebound action of the reset spring 82, thereby generating a suction effect in the upper cavity of the piston box 8, thereby opening the one-way valve in the exhaust pipe 84, so that the gas in the feed hopper 3 enters the piston box 8 along the exhaust pipe 84, and so on. First, the air pressure in the feed hopper 3 will be reduced, and the rotation of the stirring paddle 62 will make the bubbles in the plastic melt float up and be discharged quickly, which effectively improves the use effect of the plastic melt and ensures the processing quality of the plastic pipe. Secondly, the high-temperature airflow extracted from the feed hopper 3 can be sent to the outer smoothing groove 72 to preheat the outer smoothing ring 7 so as to smooth the plastic pipe, further improving the processing quality of the plastic pipe.

[0045] After the mixing and exhaust of the plastic melt are completed, the electric push rod 52 is turned on to pull the sealing plate 51 to move, thereby opening the connection between the feed hopper 3 and the extrusion tube 1, so that the plastic melt falls into the extrusion tube 1. At this time, the stirring shaft 61 cooperates with the pulley group 65 to drive the extrusion auger 4 to rotate, so that the plastic melt is pushed and extruded into the molding tube 2, thereby forming a plastic tube embryo. After the plastic tube embryo moves along the molding tube 2 for a period of time, it will be initially cooled to form a softer plastic tube. At this time, the rotating shaft of the extrusion auger 4 will drive the second friction ring 731 to rotate, and the driven shaft 6 will drive the first friction ring 721 to rotate. Using the effect of friction, the outer smoothing ring 7 and the inner smoothing ring 71 will rotate at the same time, so as to frictionally smooth the inner and outer walls of the initially formed plastic tube, effectively improving the smoothness of the inner and outer walls of the plastic tube and ensuring the processing quality of the plastic tube.

[0046] Embodiment 2: The processing steps of the plastic tube are as follows:

[0047] Step 1, add the plastic melt into the feed hopper 3 for stirring and mixing: Pour the plastic melt into the feed hopper 3, and turn on the drive motor 64, so that it drives the driven shaft 6 to rotate through the pulley group 65, and cooperates with the transmission action of the bevel gear group 63, which will make the stirring shaft 61 and the stirring paddle 62 rotate in the feed hopper 3, so as to stir the plastic melt and ensure that the components inside are evenly mixed.

[0048] Step 2: During the stirring process, the bubbles in the plastic melt are discharged: the repulsive effect between the lower magnetic plate 83 and the upper magnetic plate 81 will cause the upper magnetic plate 81 to move upward, thereby compressing the gas in the upper cavity of the piston box 8 and opening the one-way valve in the exhaust pipe 85, so that the gas in the piston box 8 enters the outer smoothing groove 72 along the exhaust pipe 85. After the lower magnetic plate 83 and the upper magnetic plate 81 are separated from the repulsive area, the upper magnetic plate 81 will be reset under the rebound effect of the reset spring 82, thereby generating suction in the upper cavity of the piston box 8, thereby opening the one-way valve in the exhaust pipe 84, so that the gas in the feed hopper 3 enters the piston box 8 along the exhaust pipe 84. This reciprocating process will first reduce the air pressure in the feed hopper 3, and with the rotation of the stirring paddle 62, the bubbles in the plastic melt will quickly float up and be discharged, effectively improving the use effect of the plastic melt.

[0049] Step 3: Pour the molten plastic into the extrusion tube 1 for extrusion molding: The stirring shaft 61 cooperates with the pulley set 65 to drive the extrusion auger 4 to rotate, so that the molten plastic is pushed and extruded into the molding tube 2 to form a plastic tube embryo. After the plastic tube embryo moves along the molding tube 2 for a period of time, it will be initially cooled to form a softer plastic tube.

[0050] Step 4: Smooth the inner and outer walls of the plastic tube initially formed during the extrusion process: the rotating shaft of the extrusion auger 4 will drive the second friction ring 731 to rotate, and the driven shaft 6 will drive the first friction ring 721 to rotate. By utilizing the friction force, the outer smoothing ring 7 and the inner smoothing ring 71 will rotate at the same time, so as to frictionally smooth the inner and outer walls of the initially formed plastic tube, effectively improving the smoothness of the inner and outer walls of the plastic tube and ensuring the processing quality of the plastic tube.

[0051] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A plastic pipe processing device, comprising an extrusion pipe (1), a forming pipe (2) and a feed hopper (3), characterized in that: The forming tube (2) is fixed at the end of the extrusion tube (1), the feeding hopper (3) is fixed at the top of the extrusion tube (1), the extrusion tube (1) is connected to the inner cavity of the forming tube (2), and an extrusion auger (4) is rotatably connected inside the extrusion tube (1), the feeding hopper (3) is connected to the inner cavity of the extrusion tube (1), and a sealing portion is provided at the connection between the feeding hopper (3) and the extrusion tube (1), and further comprises: A stirring mechanism, the stirring mechanism is arranged in the supply hopper (3), and the stirring mechanism is used to stir the plastic melt in the supply hopper (3); A smoothing component, the smoothing component is arranged in the forming tube (2), and is used to smooth the inner and outer walls of the preliminarily formed plastic tube; A bubble suction component is provided on the molding tube (2) and is used to discharge bubbles contained in the plastic melt in the supply hopper (3).

2. A plastic pipe processing device according to claim 1, characterized in that: The sealing portion comprises a sealing bin (5), the sealing bin (5) being fixed on the top of the extrusion tube (1), and the sealing bin (5) being communicated with the inner cavity of the extrusion tube (1) and the feeding hopper (3) respectively, a sealing plate (51) being slidably connected inside the sealing bin (5), an electric push rod (52) being fixedly connected to the outer wall of the sealing bin (5), and a telescopic end of the electric push rod (52) penetrating into the sealing bin (5) and being fixedly connected to the side wall of the sealing plate (51).

3. A plastic pipe processing device according to claim 1, characterized in that: The stirring mechanism comprises a driven shaft (6), wherein the driven shaft (6) is rotatably connected to the bottom of the inner cavity of the feeding hopper (3), and the top of the inner cavity of the feeding hopper (3) is rotatably connected to a stirring shaft (61), and the outer wall of the stirring shaft (61) is fixedly connected to a stirring paddle (62). The bottom end of the stirring shaft (61) is transmission-connected to the outer wall of the driven shaft (6) via a bevel gear set (63), and a protective shell (631) is sleeved on the outer side of the bevel gear set (63), and the protective shell (631) is rotationally connected to the driven shaft (6) and the stirring shaft (61), and the protective shell (631) is fixedly connected to the inner wall of the feeding hopper (3). A driving motor (64) is fixedly connected to the bottom side wall of the extrusion tube (1), and the output shaft of the driving motor (64), the driven shaft (6) and the end of the rotating shaft of the extrusion auger (4) are transmission-connected via a pulley set (65).

4. A plastic pipe processing device according to claim 3, characterized in that: The stirring paddles (62) are arranged in three groups at equal intervals along the outer wall of the stirring shaft (61), the lengths of the three groups of stirring paddles (62) increase from bottom to top, and the inclination directions of two adjacent groups of stirring paddles (62) are opposite.

5. A plastic pipe processing device according to claim 3, characterized in that: The smoothing assembly comprises an outer smoothing ring (7) and an inner smoothing ring (71); an outer smoothing groove (72) is provided on the inner wall of the forming tube (2); the outer smoothing ring (7) is rotatably connected in the outer smoothing groove (72), and the outer wall of the outer smoothing ring (7) is flush with the inner wall of the forming tube (2); the driven shaft (6) extends through the outer smoothing groove (72) and is fixedly connected to a first friction ring (721); the first friction ring (721) rotates in contact with the outer wall of the outer smoothing ring (7).

6. A plastic pipe processing device according to claim 5, characterized in that: An inner smoothing groove (73) is provided on the inner core rod of the forming tube (2); the inner smoothing ring (71) is rotatably connected in the inner smoothing groove (73); and the outer wall of the inner smoothing ring (71) is flush with the outer wall of the inner core rod of the forming tube (2); the rotating shaft of the extrusion auger (4) passes through the inner smoothing groove (73) and is fixedly connected with a second friction ring (731); the second friction ring (731) rotates in contact with the inner side wall of the inner smoothing ring (71).

7. A plastic pipe processing device according to claim 6, characterized in that: The bubble suction component comprises a piston box (8), wherein the piston box (8) is fixed on the top of the forming tube (2), and the inner cavity of the piston box (8) is connected to the inner cavity of the outer smoothing groove (72); an upper magnetic plate (81) is slidably connected inside the piston box (8), a return spring (82) is fixedly connected between the top of the upper magnetic plate (81) and the inner wall of the piston box (8); lower magnetic plates (83) are fixedly connected to both sides of the first friction ring (721), and the lower magnetic plate (83) and the upper magnetic plate (81) are magnetically mutually connected; an exhaust pipe (84) is fixedly connected to the side wall of the piston box (8) and is connected; the other end of the exhaust pipe (84) is connected to the top of the inner cavity of the feeding hopper (3), and a one-way valve is arranged inside the exhaust pipe (84).

8. A plastic pipe processing device according to claim 7, characterized in that: An exhaust pipe (85) is fixed on and connected to the side wall of the piston box (8), the other end of the exhaust pipe (85) is connected to the inner cavity of the outer smoothing groove (72), and a one-way valve is arranged in the exhaust pipe (85). A pressure relief pipe (86) is fixedly connected to the side wall of the bottom of the outer smoothing groove (72), and a pressure valve is arranged in the pressure relief pipe (86).

9. A plastic pipe processing device according to claim 7, characterized in that: The friction force between the first friction ring (721) and the outer smoothing ring (7) is greater than the friction force between the outer smoothing ring (7) and the outer wall of the initially formed plastic tube, and the friction force between the second friction ring (731) and the inner smoothing ring (71) is greater than the friction force between the inner smoothing ring (71) and the inner wall of the initially formed plastic tube.

10. A plastic pipe processing device according to claim 7, characterized in that: The repulsive force between the lower magnetic plate (83) and the upper magnetic plate (81) is greater than the thrust required for the return spring (82) to retract.

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