CN115195074A

CN115195074A - PE pipe extrusion molding processing method

Info

Publication number: CN115195074A
Application number: CN202210828865.1A
Authority: CN
Inventors: 陈国平; 黄方辉; 李仁国
Original assignee: Individual
Current assignee: Hebei Pushang Pipeline Technology Co ltd
Priority date: 2022-07-15
Filing date: 2022-07-15
Publication date: 2022-10-18
Anticipated expiration: 2042-07-15
Also published as: CN115195074B

Abstract

The invention relates to a PE pipe extrusion molding processing method, which adopts an extrusion molding device to produce a PE pipe, wherein the extrusion molding device comprises: the traction machine is provided with a traction pipe at the inlet position; an extruder having a polyethylene material disposed therein; clamping the cutting assembly; a drive assembly; the PE pipe extrusion molding processing method comprises the following steps: s1, preparing; s2, cleaning a hardened material: cutting off the hardened material at the outlet of the extruder by using a clamping and cutting assembly; s3, closing up the polyethylene material; s4, connecting a traction pipe; s5, preparing a PE pipe: and drawing out the polyethylene material extruded by the extruder through the matching of a traction machine and the extruder, and then cooling and cutting the polyethylene material to prepare the PE pipe. According to the invention, the hardened polyethylene material at the outlet of the extruder can be cleaned by rotating the blades of the clamping jaws, manual cleaning is not needed, and the working efficiency is improved.

Description

PE pipe extrusion molding processing method

Technical Field

The invention relates to the technical field of PE pipes, in particular to a PE pipe extrusion molding processing method.

Background

The PE (polyethylene) pipe is one of the most common pipes, and is widely used in construction projects such as water supply, water drainage, heat supply, gas supply, and the like. Polyethylene has the characteristics of no odor, no toxicity and the like, and is not easy to be corroded by rotten substances in sewage, chemicals, soil and the like, so that a PE pipeline is widely used in daily life, the demand of the PE pipeline is increased day by day, at present, when the PE pipeline is produced, one end of the PE pipeline is generally used as a traction pipe, when an extruder heats a polyethylene material to a certain degree, the traction pipe is heated by using a hot polyethylene material, then the polyethylene material is adhered with the traction pipe to form fixed connection, the connection part is required to form sealing, finally the polyethylene material is drawn and molded under the combined action of the extruder and the tractor, then the polyethylene material is cooled by water to be shaped, and finally the polyethylene material is cut into required length to complete preparation, but in the existing preparation process, the following problems still exist:

1. before the polyethylene material is connected with the traction pipe, workers are required to shovel off the hardened polyethylene material at the outlet of the extruder, so that the polyethylene material is guaranteed to be a high-temperature material when extruded and adhered with the traction pipe, and the high-temperature material has viscosity, but manual cleaning is troublesome, and high temperature is dangerous;

2. when the polyethylene material is connected with the traction tube, the hot polyethylene material is required to be wound on the outer side of the traction tube, and the traction tube is heated for many times, so that the polyethylene material on the traction tube can be connected after being melted and sticky, the process is time-consuming and labor-consuming to operate, and certain danger exists because the temperature of the polyethylene material is overhigh (generally about 220 ℃);

3. when the polyethylene material is connected with the traction tube, the polyethylene material is required to be manually closed up by an extruder and pressed on the traction tube due to the large outer diameter of the polyethylene material during adhesion, the polyethylene is difficult to be manually closed up for preparing the large-caliber PE tube in the process, and the traction tube and the polyethylene are required to be adhered, so that the polyethylene can be reliably adhered and sealed only by great force when being pressed on the traction tube, and the work can be generally finished by three to four persons, so that a large amount of labor is consumed, and the efficiency is not high;

4. after polyethylene material and traction tube adhesion are good, need repair the shape to the junction, because tractor import bore is limited, and polyethylene material and the general diameter of traction tube adhesion junction are great, can lead to a large amount of polyethylene material cards in the tractor entrance and can't get into in the tractor if not repairing the shape to here, thereby lead to the preparation failure, but repair the shape work and need workman's use tool to cut or press, not only waste time and energy, efficiency is not high, and has certain danger.

Disclosure of Invention

In view of the above, it is necessary to provide a PE tube extrusion processing method that reduces the amount of labor and improves the work efficiency.

The invention discloses a PE pipe extrusion molding processing method, which adopts an extrusion molding device to produce a PE pipe, wherein the extrusion molding device comprises: the traction pipe is placed at the inlet position of the traction machine, an installation groove is formed in the inner wall of the traction pipe, and the traction machine is used for driving the traction pipe to move left and right; the extruder is placed on one side of the traction machine, a polyethylene material is arranged in the extruder, and the extruder is used for heating and extruding the polyethylene material; the clamping and cutting assembly is arranged in the traction pipe and is used for cutting off hardened materials at the outlet of the extruder and clamping and connecting polyethylene materials; the driving assembly is arranged in the traction pipe and is used for driving the clamping and cutting assembly to rotate for cutting;

the PE pipe extrusion molding processing method comprises the following steps: s1, preparation: firstly, putting a traction pipe into a traction machine, and then heating a polyethylene material by using an extruder; s2, cleaning a hardened material: the traction machine drives the clamping and cutting assembly to move towards the outlet of the extruder until the clamping and cutting assembly is contacted with the outlet of the extruder, and then the driving assembly drives the clamping and cutting assembly to rotate, so that the hardened material at the outlet of the extruder is cut off, and the hardened material is cleaned; s3, closing the polyethylene material: the traction tube is driven to move leftwards to a proper position by the aid of the traction machine, meanwhile, the extruder works to heat and extrude the polyethylene material, the polyethylene material is contracted at an outlet when extruded under the guidance of the clamping and cutting assembly, and the closing-up is completed after one end of the polyethylene material is extruded for a distance; s4, connecting a traction pipe: the traction pipe is continuously driven by the tractor to move a certain distance leftwards, so that the polyethylene material is firmly and hermetically connected with the clamping and cutting assembly; s5, preparing a PE pipe: and drawing out the polyethylene material extruded by the extruder through the matching of a traction machine and the extruder, and then cooling and cutting the polyethylene material to prepare the PE pipe.

In one embodiment, the clamping and cutting assembly comprises: the linkage ring is fixedly connected to the outer end face of the traction pipe; the pipe core is connected in the traction pipe in a sliding mode, one end of the pipe core penetrates through the traction pipe and the linkage ring, a limiting mechanism is arranged between the pipe core and the linkage ring, one end, located in the traction pipe, of the pipe core is fixedly connected with a gear ring connected with the driving assembly, one end, located outside the traction pipe, of the pipe core is provided with an annular pressure groove, a bulge in sliding connection with the installation groove is fixedly connected to the pipe core, and the bulge divides the installation groove into a first cavity and a second cavity; the two ends of the first spring are respectively abutted against the inner wall of the first cavity and the side wall of the bulge, and the first spring is used for pushing the bulge to move towards the direction of the second cavity; the annular liquid sac is fixedly arranged in the annular pressure groove, has elasticity and is internally provided with liquid; the first sliding cavity is arranged on the protrusion, one end of the first sliding cavity is communicated with the second cavity, a flow passage is communicated between the other end of the first sliding cavity and the annular liquid bag, and a piston is connected in the first sliding cavity in a sliding mode; the clamping jaws are arranged on the outer sides of the tube cores in an array mode, and connecting rod mechanisms are hinged among the clamping jaws, the linkage rings and the tube cores.

In one embodiment, a second sliding cavity, a third sliding cavity and a channel communicated between the second sliding cavity and the third sliding cavity are arranged on the linkage ring, oil is arranged in the channel, a control button is connected in the second sliding cavity in a sliding mode, and the third sliding cavity is communicated with the outer side face of the tube core.

In one embodiment, the limiting mechanism comprises a positioning pin connected to the third sliding cavity in a sliding manner and a limiting groove arranged on the outer side surface of the tube core, and a second spring is arranged between the third sliding cavity and the positioning pin.

In one embodiment, one end of each clamping jaw, which is close to the extruder, is fixedly connected with a conical partition plate, the conical partition plates are spliced to form a conical barrel, and an extrusion block which is clamped into the annular pressure groove and a blade which is used for cutting off hardened materials are fixedly connected to the inner concave surface of each conical partition plate.

In one embodiment, the driving assembly comprises a motor fixed in the traction tube, and a gear meshed with the gear ring is fixedly connected to the output end of the motor.

In one embodiment, in step S2, the traction tube is driven by the traction machine to move rightward and the connecting rod mechanism drives the clamping jaws to open until the blade touches the outlet of the extruder, and at the same time, the liquid in the annular liquid bag is pressed into the first sliding cavity to push the piston to extend out, then the motor is started, the pipe core is driven to rotate by meshing of the gear and the toothed ring, the clamping jaws are driven to rotate synchronously, and then the hardened material at the outlet of the extruder is cut off by the blade, so that the hardened material is cleaned.

In one embodiment, in step S3, the traction tube is driven by the traction machine to move left until the control button just contacts with the inlet of the traction machine, the traction machine stops, then the extruder works to extrude the polyethylene material into a cylindrical structure, further under the guidance of the chamfer at the front end of the conical partition plate, the outlet of the polyethylene material is contracted and gradually contacts with the tube core when the polyethylene material is extruded, and when the polyethylene material is extruded for a distance, the closing is completed.

In one embodiment, in step S4, the traction tube is driven by the tractor to move leftward continuously, the positioning pin is pushed under the action of the control button to exit the limiting groove against the second spring, the tube core is pushed by the first spring to move rightward, the clamping jaw is driven by the link mechanism to move toward the middle, so that the extrusion block presses the polyethylene material into the annular pressure groove, and the piston is pushed to push the liquid into the annular liquid bag to expand the liquid bag, so that the polyethylene material and the tube core are connected firmly.

In one embodiment, the center of the die is provided with an axial through hole.

The invention has the beneficial effects that:

1. through set up the clamping jaw between tube core and traction tube, drive the traction tube at the tractor and stretch out and push up the extruder at the tube core after, the traction tube continues to stretch out, and then can control the clamping jaw and open, and when clamping jaw and extruder touched, the blade of clamping jaw just in time touched with the extruder export, and the blade that control the tube core at this moment rotated and can drive the clamping jaw clears up the sclerosis polyethylene material of extruder export, need not the manpower clearance, improves work efficiency.

2. Through setting up the toper baffle on the clamping jaw, when the clamping jaw was opened, the polyethylene material that utilizes the guide effect of toper baffle can guide to extrude was closed up, avoids the manpower to close up, and when the clamping jaw was closed, each toper baffle can be assembled into a circular cone section of thick bamboo to the polyethylene material of parcel on the tube core is extruded and is repaiied the shape, makes its diameter can not be too big, and then can make things convenient for it to get into in the tractor smoothly.

3. Through set up the extrusion piece on the clamping jaw and set up annular liquid bag on the tube core for each extrusion piece can assemble annularly when the clamping jaw is closed, and then detain the annular indent of polyethylene material on the tube core, and annular liquid bag inflation is in order to extrude the polyethylene material to the extrusion ring simultaneously, so can fix the polyethylene material on the tube core, and can form reliable sealed.

4. Through set up control button and locating pin on the link ring for can pass through the cooperation between tractor entry and the control button when tractor control traction tube removes, and then the control clamping jaw is closed, thereby makes the connection process between polyethylene material and the traction tube all not need the manpower, and control is simple.

Drawings

FIG. 1 is a cross-sectional view of the present invention;

FIG. 2 is a cross-sectional view of the present invention with the jaws open;

FIG. 3 is a cross-sectional view of a necked polyethylene material of the present invention;

FIG. 4 is a cross-sectional view of the polyethylene material of the present invention after connection to a traction tube;

FIG. 5 is an external view of a jaw of the present invention;

figure 6 is an external view of the jaw of the present invention in another orientation.

In the figure, a tractor 1, an extruder 2, a traction tube 3, a first spring 31, a first chamber 32, a second chamber 33, a tube core 4, a toothed ring 41, an axial through hole 42, a limiting groove 43, a piston 44, a first sliding cavity 45, an annular pressure groove 46, a protrusion 47, a flow passage 48, a linkage ring 5, a positioning pin 51, a second spring 52, a control button 53, a third sliding cavity 54, a channel 55, a second sliding cavity 56, a motor 61, a gear 62, an annular liquid bag 7, a clamping jaw 81, a blade 811, a squeezing block 812, a conical partition 813, a connecting rod mechanism 82 and a polyethylene material 9.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 6, the present invention discloses a PE pipe extrusion molding method, which uses an extrusion molding apparatus to produce a PE pipe, wherein the extrusion molding apparatus includes: the tractor comprises a tractor 1, wherein a traction tube 3 is placed at the inlet position of the tractor 1, the inner wall of the traction tube 3 is provided with a mounting groove, and the tractor 1 is used for driving the traction tube 3 to move left and right; the extruder 2 is placed on one side of the tractor 1, a polyethylene material 9 is arranged in the extruder 2, and the extruder 2 is used for heating and extruding the polyethylene material 9; the clamping and cutting assembly is arranged in the traction pipe 3 and is used for cutting off hardened materials at the outlet of the extruder 2 and clamping and connecting the polyethylene material 9; the driving assembly is arranged in the traction tube 3 and is used for driving the clamping and cutting assembly to rotate for cutting;

as shown in fig. 1 to 6, the PE pipe extrusion molding processing method includes: s1, preparation: firstly, putting a traction tube 3 into a traction machine 1, then heating a polyethylene material 9 by using an extruder 2, and completing preparation work after the polyethylene material 9 is heated; s2, cleaning a hardened material: the traction pipe 3 is driven to move rightwards by the traction machine 1, so that the clamping and cutting assembly is driven to move towards the outlet of the extruder 2 until the clamping and cutting assembly is contacted with the outlet, and then the driving assembly is used for driving the clamping and cutting assembly to rotate, so that hardened materials at the outlet of the extruder 2 are cut off, and the hardened materials are cleaned; s3, closing up the polyethylene material 9: the traction tube 3 is driven to move leftwards to a proper position by the traction machine 1, meanwhile, the extruder 2 works to heat and extrude the polyethylene material 9, the polyethylene material 9 is contracted at an outlet when being extruded under the guidance of the clamping and cutting assembly, and the closing-up is completed after one end is extruded for a distance; s4, connecting a traction pipe 3: the traction tube 3 is continuously driven to move a certain distance leftwards by the traction machine 1, so that the polyethylene material 9 is firmly and hermetically connected with the clamping and cutting assembly; s5, preparing a PE pipe: the polyethylene material 9 extruded by the extruder 2 is pulled out through the matching of the tractor 1 and the extruder 2, and then is water-cooled and cut to prepare the PE pipe.

Preferably, as shown in fig. 1 to 4, the clamping and cutting assembly includes: the linkage ring 5 is fixedly connected to the outer end face of the traction tube 3; a tube core 4, which is slidably connected in the traction tube 3, and one end of which penetrates through the traction tube 3 and the linkage ring 5, wherein a limiting mechanism is arranged between the tube core 4 and the linkage ring 5, one end of the tube core 4, which is positioned in the traction tube 3, is fixedly connected with a gear ring 41 connected with the driving component, one end of the tube core 4, which is positioned outside the traction tube 3, is provided with an annular pressure groove 46, a bulge 47 slidably connected with the installation groove is fixedly connected on the tube core 4, and the installation groove is divided into a first cavity 32 and a second cavity 33 by the bulge 47; a first spring 31 installed in the first chamber 32, wherein two ends of the first spring 31 respectively abut against the inner wall of the first chamber 32 and the sidewall of the protrusion 47, and the first spring 31 is used for pushing the protrusion 47 to move towards the second chamber 33; the annular liquid bag 7 is fixedly arranged in the annular pressure groove 46, and the annular liquid bag 7 has elasticity and is internally provided with liquid; a first sliding cavity 45, which is arranged on the protrusion 47, one end of which is communicated with the second chamber 33, a flow channel 48 is communicated between the other end of the first sliding cavity 45 and the annular liquid bag 7, and a piston 44 is connected in the first sliding cavity 45 in a sliding manner; the clamping jaws 81 are arranged on the outer side of the tube core 4 in an array mode, and a connecting rod mechanism 82 is hinged between each clamping jaw 81 and the linkage ring 5 and between the clamping jaws and the tube core 4.

Preferably, as shown in fig. 1 to 3, a second sliding chamber 56, a third sliding chamber 54 and a channel 55 communicating between the second sliding chamber 56 and the third sliding chamber 54 are provided on the link ring 5, oil is provided in the channel 55, a control button 53 is slidably connected in the second sliding chamber 56, and the third sliding chamber 54 communicates with the outer side surface of the tube core 4.

It will be appreciated that the outer end of the control button 53 is arcuate as shown in figure 2.

Preferably, as shown in fig. 1 to 3, the limiting mechanism includes a positioning pin 51 slidably connected to the third sliding cavity 54 and a limiting groove 43 disposed on an outer side surface of the tube core 4, and a second spring 52 is installed between the third sliding cavity 54 and the positioning pin 51.

Preferably, as shown in fig. 1, 5, and 6, one end of each clamping jaw 81 close to the extruder 2 is fixedly connected with a conical partition plate 813, a plurality of conical partition plates 813 are spliced to form a conical cylinder, and an extrusion block 812 for being clamped into the annular pressing groove 46 and a blade 811 for cutting off hardened material are fixedly connected to an inner concave surface of the conical partition plate 813.

It is worth mentioning that as shown in fig. 1, 5 and 6, the clamping jaws 81 are provided with six clamping jaws, when the clamping jaws 81 are closed, the conical partition plates 813 on each clamping jaw 81 are spliced to form a conical cylinder, and the squeezing blocks 812 on each clamping jaw 81 are spliced to form a ring.

It will be appreciated that the end of the blade 811 facing the extruder 2 is provided with a chamfer as shown in figure 6.

Preferably, as shown in fig. 1, the driving assembly includes a motor 61 fixed in the traction tube 3, and an output end of the motor 61 is fixedly connected with a gear 62 engaged with the gear ring 41.

It is worth mentioning that, as shown in fig. 1 and 2, the gear wheel 62 and the toothed ring 41 are slidably connected.

Preferably, as shown in fig. 1 to 6, in step S2, after the polyethylene material 9 is heated, the traction tube 3 is driven by the tractor 1 to move rightward until the front end of the tube core 4 contacts the extruder 2, and then the traction tube 3 is driven to move rightward continuously, so as to push the linkage ring 5 to move rightward synchronously, and the clamping jaws 81 are driven to open by the link mechanism 82 until the blades 811 at the front end of the clamping jaws 81 contact the outlet of the extruder 2, at this time, the positioning pins 51 are aligned with the limiting grooves 43 and the positioning pins 51 are driven by the second springs 52 to be clamped into the limiting grooves 43, so that the linkage ring 5 is positioned, so that the clamping jaws 81 are kept in an open state, and simultaneously the annular fluid bag 7 is driven to be pressed into the first sliding cavity 45 by the elastic action of the annular fluid bag to push the piston 44 to extend, and then the motor 61 is started to drive the gear 62 to rotate, so as to drive the tube core 4 to rotate by the gear ring 41, and the clamping jaws 81 and the blades 811 rotate synchronously with the tube core 4, so that the blades 811 rotate to cut off the hardened material at the outlet of the extruder 2, thereby completing the cleaning of the hardened material.

Preferably, in step S3, after the hardened material at the outlet of the extruder 2 is cleaned, the tractor 1 drives the traction tube 3 to move to the left until the control button 53 just contacts with the inlet of the tractor 1, the tractor 1 stops, in the process, the positioning pin 51 and the limiting groove 43 are used for matching to keep the clamping jaw 81 in the open state, then the extruder 2 works to extrude the polyethylene material 9 into a cylindrical structure, further under the guidance of the chamfer at the front end of the conical partition 813, the outlet of the extruded polyethylene material 9 is contracted and gradually contacts with the tube core 4, and when the polyethylene material 9 is extruded for a distance, the closing is completed.

Preferably, in step S4, after the polyethylene material 9 is closed, the tractor 1 drives the traction tube 3 to move leftward for a short distance, the control button 53 cooperates with the inlet of the tractor 1 to touch and push the control button 53 to move inward, so as to press the oil in the second sliding chamber 56 into the third sliding chamber 54 through the channel 55, the oil pushes the positioning pin 51 to exit the limiting groove 43 against the second spring 52, so as to release the positioning, at this time, the tube core 4 is pushed to move rightward under the action of the first spring 31, so as to drive the clamping jaws 81 to move toward the middle through the link mechanism 82, so as to drive the clamping jaws 81 to close, at this time, the conical partition plates 813 on each clamping jaw 81 are assembled to form a conical cylinder, and the polyethylene material 9 at the connection with the tube core 4 is squeezed into a conical shape so as to prevent the polyethylene material 9 from being too large in diameter to be clamped at the outlet of the tractor 1, at the same time, the squeezing blocks 812 on each clamping jaw 81 are assembled to form a ring shape, so as to press the polyethylene material 9 into the ring-shaped pressing groove 46, at this time, the tube core 4 and the traction tube 3 can be reliably connected, so as well as the traction tube 7 can be connected.

Preferably, as shown in fig. 1, the center of the tube core 4 is provided with an axial through hole 42.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The PE pipe extrusion molding processing method is characterized in that an extrusion molding device is used for producing a PE pipe, and the extrusion molding device comprises:

the traction device comprises a traction machine, a traction pipe is placed at the inlet position of the traction machine, an installation groove is formed in the inner wall of the traction pipe, and the traction machine is used for driving the traction pipe to move left and right;

the extruder is placed on one side of the traction machine, a polyethylene material is arranged in the extruder, and the extruder is used for heating and extruding the polyethylene material;

the clamping and cutting assembly is arranged in the traction pipe and is used for cutting off hardened materials at the outlet of the extruder and clamping and connecting polyethylene materials;

the driving assembly is arranged in the traction pipe and is used for driving the clamping and cutting assembly to rotate for cutting;

the PE pipe extrusion molding processing method comprises the following steps:

s1, preparation: putting a traction pipe into a traction machine, and heating a polyethylene material by using an extruder;

s2, cleaning a hardened material: the traction machine drives the clamping and cutting assembly to move towards the outlet of the extruder until the clamping and cutting assembly is contacted with the outlet of the extruder, and then the driving assembly drives the clamping and cutting assembly to rotate, so that the hardened material at the outlet of the extruder is cut off, and the hardened material is cleaned;

s3, closing up the polyethylene material: the traction tube is driven to move leftwards to a proper position by the aid of the traction machine, meanwhile, the extruder works to heat and extrude the polyethylene material, the polyethylene material is contracted at an outlet when extruded under the guidance of the clamping and cutting assembly, and the closing-up is completed after one end of the polyethylene material is extruded for a distance;

s4, connecting a traction pipe: the traction pipe is continuously driven to move a certain distance leftwards by the traction machine, so that the polyethylene material is firmly and hermetically connected with the clamping and cutting assembly;

s5, preparing a PE pipe: and drawing out the polyethylene material extruded by the extruder through the matching of a traction machine and the extruder, and then cooling and cutting the polyethylene material to prepare the PE pipe.

2. The PE pipe extrusion process of claim 1 wherein the clamping and cutting assembly comprises:

the linkage ring is fixedly connected to the outer end face of the traction pipe;

the pipe core is connected in the traction pipe in a sliding mode, one end of the pipe core penetrates through the traction pipe and the linkage ring, a limiting mechanism is arranged between the pipe core and the linkage ring, one end, located in the traction pipe, of the pipe core is fixedly connected with a gear ring connected with the driving assembly, one end, located outside the traction pipe, of the pipe core is provided with an annular pressure groove, a bulge in sliding connection with the installation groove is fixedly connected to the pipe core, and the bulge divides the installation groove into a first cavity and a second cavity;

the two ends of the first spring are respectively abutted against the inner wall of the first cavity and the side wall of the bulge, and the first spring is used for pushing the bulge to move towards the direction of the second cavity;

the annular liquid sac is fixedly arranged in the annular pressure groove, is elastic and is internally provided with liquid;

the first sliding cavity is arranged on the protrusion, one end of the first sliding cavity is communicated with the second cavity, a flow channel is communicated between the other end of the first sliding cavity and the annular liquid bag, and a piston is connected in the first sliding cavity in a sliding mode;

the clamping jaws are arranged on the outer sides of the tube cores in an array mode, and connecting rod mechanisms are hinged among the clamping jaws, the linkage rings and the tube cores.

3. The extrusion molding processing method of the PE tube according to claim 2, wherein the linkage ring is provided with a second sliding cavity, a third sliding cavity and a channel communicated between the second sliding cavity and the third sliding cavity, oil is arranged in the channel, a control button is connected in the second sliding cavity in a sliding manner, and the third sliding cavity is communicated with the outer side surface of the tube core.

4. The PE tube extrusion molding processing method according to claim 3, wherein the limiting mechanism comprises a positioning pin slidably connected to the third sliding cavity and a limiting groove arranged on the outer side surface of the tube core, and a second spring is installed between the third sliding cavity and the positioning pin.

5. The PE tube extrusion molding processing method according to claim 4, wherein one end of each clamping jaw close to the extruder is fixedly connected with a conical partition plate, a plurality of conical partition plates are spliced to form a conical barrel, and an extrusion block which is clamped into the annular pressing groove and a blade which is used for cutting off hardened materials are fixedly connected to an inner concave surface of each conical partition plate.

6. The PE tube extrusion molding process of claim 5, wherein the driving assembly comprises a motor fixed in the traction tube, and a gear engaged with the gear ring is fixedly connected to an output end of the motor.

7. The PE tube extrusion molding processing method according to claim 6, wherein in step S2, the traction tube is driven by the traction machine to move rightwards, the connecting rod mechanism drives the clamping jaws to open until the blade touches the outlet of the extruder, meanwhile, the liquid in the annular liquid bag is pressed into the first sliding cavity to push the piston to extend out, then the motor is started, the tube core is driven to rotate by the meshing of the gear and the toothed ring, the clamping jaws are driven to rotate synchronously, and then the hardened material at the outlet of the extruder is cut off by the blade, so that the hardened material is cleaned.

8. The PE tube extrusion molding processing method according to claim 6, wherein in step S3, the traction tube is driven by the traction machine to move left until the control button just contacts with the inlet of the traction machine, the traction machine stops, then the extruder is operated to extrude the polyethylene material into a cylindrical structure, further under the guidance of the chamfer at the front end of the conical partition plate, the outlet of the polyethylene material is contracted and gradually contacts with the tube core when the polyethylene material is extruded, and the closing-up is completed after the polyethylene material is extruded for a distance.

9. The PE tube extrusion molding processing method according to claim 6, wherein in step S4, the traction tube is driven by the traction machine to move leftwards continuously, the positioning pin is pushed to overcome the second spring to exit the limiting groove under the action of the control button, the tube core is pushed to move rightwards by the first spring, the clamping jaw is driven to move towards the middle by the connecting rod mechanism, so that the extrusion block presses the polyethylene material into the annular pressing groove, and meanwhile, the piston is pushed to push the liquid into the annular liquid bag to expand the liquid, so that the polyethylene material and the tube core are firmly connected.

10. The extrusion molding processing method of the PE tube according to claim 2, wherein an axial through hole is provided in the center of the tube core.