CN116714210A - A cost-saving PE water pipe extrusion molding process - Google Patents

Abstract

The invention relates to the field of water pipe processing, specifically to a cost-saving PE water pipe extrusion molding process. The base of the extruder is provided with an extrusion pipe and a hydraulic cylinder. The output end of the hydraulic cylinder is provided with a push plate, and the push plate extends Inside the extrusion tube, the feeding device is located at the top of the extrusion tube. A push device is fixedly provided on one side of the base. An automatic switching device is provided between the push device and the extrusion tube. The sealing device includes a first sealing mechanism and a third Two sealing mechanisms, the first sealing mechanism is set between the pushing device and the extrusion tube, the second sealing mechanism is set between the automatic switching device and the pushing device, the scraping device is fixedly set at the output end of the pushing device, through the feeding device After feeding, the hydraulic cylinder drives the push plate to push and squeeze. When the push plate is pushed to the extrusion port, the automatic switching device can enlarge and reduce the extrusion port. After adjusting to the appropriate aperture, the push device can Push the automatic switching device until it is close to the extrusion tube and the material is discharged.

Description

A cost-saving PE water pipe extrusion molding process

Technical field

The invention relates to the field of water pipe processing, specifically to a cost-saving PE water pipe extrusion molding process.

Background technique

The extruder is one of the types of plastic machinery and originated in the 18th century. According to the direction of the material flow of the extruder head and the angle between the screw center line, the extruder head can be divided into a right-angle head and an oblique head. The screw extruder relies on the pressure and shear force generated by the rotation of the screw, which allows the material to be fully plasticized and evenly mixed. Through die molding, plastic extruders can be basically classified into twin-screw extruders and single-screw extruders. Extruder, as well as rare multi-screw extruders and screw-less extruders, among which PE pipes can also be produced with extruders.

In the existing technology, most extruders can only extrude PE pipes of one size. If you need to produce PE pipes of different sizes, you need to use another extruder to produce them, making one extruder The practicality is very low.

Chinese Patent No. CN216400496U discloses a parallel circulation flow type PE pipe extruder. The device pulls the circular handle, which drives the sliding rod to move. At the same time, the sliding rod drives the clamping block to move, and the clamping block squeezes the spring. Contract it, and then slide the limit rod to move to the inside of the second hollow groove to limit the slide rod so that the slide rod is not easily rebounded by the elastic force of the spring. At this time, the block has been separated from the card. Inside the slot, you can take and replace the extruder die of another different die, thereby producing PE pipes of different sizes; in actual use, frequent manual replacement of the die causes inconvenience and increases manpower. The cost of use is not conducive to production and processing, and the temperature of the PE pipe mouth is very high after processing the PE pipe, which greatly increases the risk when manually changing the mouth mold, resulting in unsafety.

Contents of the invention

In view of the problems existing in the current technology, a cost-saving PE water pipe extrusion molding process is provided. The material is fed through the feeding device. After the material is fed, the hydraulic cylinder drives the push plate to push and squeeze. When the push plate is pushed to the extrusion port, , the extrusion port can be enlarged and reduced through the automatic switching device. After adjusting to the appropriate hole diameter, the automatic switching device can be pushed through the push device until it is close to the extrusion tube. The first sealing mechanism will automatically switch the device and the extrusion tube. The second sealing mechanism seals the automatic switching device and the pushing device to provide a good sealing effect when the PE pipe is extruded. After the PE pipe is extruded, the processed material can be scraped off by the scraper device. Waste material on the outer wall of PE pipe fittings, thereby improving the processing qualification rate. Through the above operations, the size of the extrusion opening can be adjusted without manual replacement of the extrusion opening, thereby enabling the processing of PE pipes of different diameters, saving labor costs and increasing Equipment availability.

In order to solve the existing technical problems, the technical solutions adopted by the present invention are:

A cost-saving PE water pipe extrusion molding process uses an extruder to extrude PE water pipes. The extruder includes a base, an extrusion tube and a hydraulic cylinder are provided on the base, and a push plate is provided at the output end of the hydraulic cylinder. , the push plate extends to the inside of the extrusion tube, the feeding device is set at the top of the extrusion tube, a push device is fixed on one side of the base, an automatic switching device is set between the push device and the extrusion tube, and the sealing device includes a first Sealing mechanism and second sealing mechanism, the first sealing mechanism is arranged between the pushing device and the extrusion tube, the second sealing mechanism is arranged between the automatic switching device and the pushing device, and the scraping device is fixedly arranged at the output end of the pushing device.

Preferably, the automatic switching device includes an indexing plate, a rotating plate and a clamping device;

The indexing plate is fixedly installed on the extension frame beside the base;

The rotating plate is fixedly arranged at the output end of the indexing plate. The rotating plate is provided with a plurality of grinding holes of different types, and several second fixing holes are provided on the outside of each grinding hole;

The clamping device is fixedly arranged inside the indexing plate.

Preferably, the clamping device includes a first clamping mechanism and a second clamping mechanism, the structure of the first clamping mechanism is the same as the structure of the second clamping mechanism, and the first clamping mechanism and the second clamping mechanism are respectively arranged in mirror images on the indexing On the left and right sides of the plate, the first clamping machine structure also includes pull rods and springs;

The end of the pull rod is hinged with the indexing plate, and the other end of the pull rod extends through the inner wall of the indexing plate to the outer wall of the indexing plate;

The spring is fixedly arranged between the pull rod and the indexing plate.

Preferably, the pushing device includes a first slide rail, a first slide block, a fixed block, a tension spring, a first push rod, a second slide rail, a second push rod, a second slide block and a pushing frame;

The first slide rail is fixedly arranged on the side of the base away from the index plate;

The first slide block is slidably disposed on the first slide rail;

The fixed block is fixedly arranged on the base and located on one side of the indexing plate;

The first push rod is fixedly arranged on the first bracket; the first push rod is far away from

The second slide rail is disposed on the first base on the same side as the first slide rail;

The second push rod is movably arranged in the first and second slide rails; one side of the second push rod is hinged with the first push rod, and the side of the first push rod away from the first push rod is fixedly connected with the second slide block;

One end of the tension spring is set on the fixed block, and the other end of the tension spring is fixedly connected to the first push rod;

The push frame is fixedly arranged on the side of the second slide block away from the second push rod; the push frame is provided with several fixing rods that cooperate with the second fixing hole and the first fixing hole.

Preferably, the scraping device includes an arc scraper, a horizontal moving mechanism and a lifting mechanism;

The number of horizontal moving mechanisms is three, and the horizontal moving mechanisms are fixedly installed on the side of the push frame away from the rotating disk;

The number of lifting mechanisms is consistent with the number of horizontal moving mechanisms, and the lifting mechanisms are fixedly installed on the horizontal moving mechanisms;

The curved scraper is fixedly installed at the output end of the love lifting mechanism.

Preferably, the horizontal moving mechanism includes a third slide rail. third slide block and fixing bolt;

The third slide rail is fixedly arranged on the side of the push frame away from the rotating disk, and a plurality of third fixing holes are provided on the third slide rail;

The third slide block is slidably disposed on the third slide rail, and the third slide block is provided with a fourth fixing hole;

The fixing bolts are fixedly arranged on the third fixing hole and the fourth fixing hole.

Preferably, the lifting mechanism includes a fourth slide rail and a fourth slide block;

The fourth slide rail is fixedly arranged on the side of the third slide block away from the third slide rail;

The fourth slide block is slidably disposed on the fourth slide rail.

Preferably, the feeding device includes a feeding hopper;

The feed hopper is fixedly arranged above the extrusion tube. The feed hopper is provided with a sealing cover, and the sealing cover is hingedly connected with the feed hopper.

Preferably, the first sealing mechanism and the second sealing mechanism have the same structure, and the first sealing mechanism includes a sealing ring and a sealing groove;

The sealing ring is fixedly installed on the side of the extrusion tube close to the rotating disk;

The sealing groove is fixedly arranged on the rotating disk.

Preferably, the arc-shaped scraper is provided with a scraper brush;

Through the setting of the scraper brush, the cleaning effect on the outer wall of the pipe is achieved after the scraper is scraped, ensuring the cleanliness of the outer wall of the pipe diameter, thus increasing the practicality.

Compared with the prior art, the beneficial effects of this application are:

1. Through the cooperation of the automatic switching device and the push device, this application realizes that the grinding hole can automatically switch to grinding holes of different diameters without manual disassembly, reducing labor costs and increasing work efficiency.

2. This application realizes scraping of the outer wall of the processed PE pipe fittings through the setting of the scraping device, thereby increasing the product qualification rate.

Description of the drawings

Figure 1 is a front view of a cost-saving PE water pipe extrusion molding process;

Figure 2 is a side view of a cost-saving PE water pipe extrusion molding process;

Figure 3 is a top view of a cost-saving PE water pipe extrusion molding process;

Figure 4 is a schematic diagram of the three-dimensional structure of a cost-saving PE water pipe extrusion molding process;

Figure 5 is a schematic diagram 2 of the three-dimensional structure of a cost-saving PE water pipe extrusion molding process;

Figure 6 is a three-dimensional structural diagram of a cost-saving PE water pipe extrusion molding process;

Figure 7 is a schematic diagram 4 of the three-dimensional structure of a cost-saving PE water pipe extrusion molding process;

Figure 8 is an enlarged view of point A in Figure 1 of a cost-saving PE water pipe extrusion molding process;

Figure 9 is an enlarged view of B in Figure 3 of a cost-saving PE water pipe extrusion molding process;

Figure 10 is an enlarged view of C in Figure 4 of a cost-saving PE water pipe extrusion molding process.

The numbers in the picture are:

1-Base; 11-Hydraulic cylinder; 12-Extrusion tube; 2-Feeding device; 21-Feeding hopper; 211-Sealing cover; 3-Pushing device; 31-First slide rail; 32-First slide block ; 33-fixed block; 34-tension spring; 35-first push rod; 36-second slide rail; 37-second push rod; 38-second slide block; 39-push frame; 391-fixed rod;

4-Sealing device; 41-First sealing mechanism; 411-Sealing groove; 42-Second sealing mechanism; 5-Automatic switching device; 51-Indexing plate; 52-Rotating plate; 521-Grinding hole; 522-No. Two fixed holes; 53-clipping device; 531-first clipping mechanism; 532-second clipping mechanism; 6-scraper device; 61-arc scraper; 62-horizontal moving mechanism; 621-third slide rail ; 6211-third fixing hole; 622-third slide block; 623-fixing bolt; 63-lifting mechanism; 631-fourth slide rail; 632-fourth slide block.

Detailed ways

In order to further understand the characteristics, technical means, and specific purposes and functions of the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and specific implementation modes.

Referring to Figures 1 to 10, a cost-saving PE water pipe extrusion molding process uses an extruder to extrude PE water pipes. The extruder includes a base 1, and the base 1 is provided with an extrusion tube 12 and Hydraulic cylinder 11, the output end of the hydraulic cylinder 11 is provided with a push plate, the push plate extends to the inside of the extrusion tube 12, the feeding device 2 is provided at the top of the extrusion tube 12, and a push device 3 is fixedly provided on one side of the base 1, An automatic switching device 5 is provided between the pushing device 3 and the extruding tube 12. The sealing device 4 includes a first sealing mechanism 41 and a second sealing mechanism 42. The first sealing mechanism 41 is disposed between the pushing device 3 and the extruding tube 12. , the second sealing mechanism 42 is arranged between the automatic switching device 5 and the pushing device 3 , and the scraping device 6 is fixedly arranged at the output end of the pushing device 3 .

When PE water pipes need to be processed, the raw materials are fed through the feeding device 2. After feeding, the hydraulic cylinder 11 drives the push plate to push and squeeze. When the push plate is pushed to the extrusion port, the extrusion port can be moved through the automatic switching device 5. Zoom in and out. After adjusting to the appropriate aperture, the automatic switching device 5 can be pushed through the pushing device 3 until it is close to the extrusion tube 12. The first sealing mechanism 41 seals the automatic switching device 5 and the extrusion tube 12. The second sealing mechanism 42 seals the automatic switching device 5 and the pushing device 3, thereby providing a good sealing effect when the PE pipe is extruded. After the PE pipe is extruded, the processed material can be scraped off by the scraper device 6. Waste material on the outer wall of PE pipe fittings, thereby improving the processing qualification rate. Through the above operations, the size of the extrusion opening can be adjusted without manual replacement of the extrusion opening, thereby enabling the processing of PE pipes of different diameters, saving labor costs and increasing Equipment availability.

Referring to Figures 1 to 7, the automatic switching device 5 includes an indexing plate 51, a rotating plate 52 and a clamping device 53; the indexing plate 51 is fixed on the extension frame beside the base 1; the rotating plate 52 is fixed on At the output end of the indexing plate 51, the rotating plate 52 is provided with a plurality of grinding hole 521 of different types, and a plurality of second fixing holes 522 are provided on the outside of each grinding hole 521; the clamping device 53 is fixedly provided on Inside the index plate 51.

The rotating plate 52 is manually installed on the indexing plate 51. The clamping device 53 can clamp the indexing plate 51 and the rotating plate 52. When the size of the mold opening needs to be changed, the rotating plate 52 can be rotated through the indexing plate 51 until Specify the position so that the grinding hole 521 is aligned with the extrusion port of the extrusion tube 12 to realize discharging. When the rotating disc 52 needs to be replaced, the rotating disc 52 and the indexing disc 51 are connected by pulling the clamping device 53 separation, thereby realizing convenient replacement of the rotating disk 52.

Referring to FIGS. 3 to 9 , the clamping device 53 includes a first clamping mechanism 531 and a second clamping mechanism 532 . The structure of the first clamping mechanism and the second clamping mechanism are the same. The two clamping mechanisms 532 are respectively arranged in mirror images on the left and right sides of the index plate 51. The first clamping mechanism also includes a pull rod and a spring; one end of the pull rod is hinged with the index plate 51, and the other end of the pull rod extends through the inner wall of the index plate 51. to the outer wall of the indexing plate 51; the spring is fixedly arranged between the pull rod and the indexing plate 51.

When it is necessary to replace the index plate 51, the operator can manually pull the pull rod to separate the pull rod from the rotating plate 52, thereby realizing the disassembly and assembly of the rotating plate 52. After the disassembly and assembly is completed, the pull rod can be disassembled and assembled by the tension of the spring. reset.

Referring to Figures 1 and 8, the pushing device 3 includes a first slide rail 31, a first slide block 32, a fixed block 33, a tension spring 34, a first push rod 35, a second slide rail 36, and a second push rod 37. , the second slider 38 and the push frame 39; the first slide rail 31 is fixedly provided on the side of the base 1 away from the index plate 51; the first slider 32 is slidably provided on the first slide rail 31; the fixed block 33 is fixed It is arranged on the base 1 and is located on one side of the index plate 51; the first push rod 35 is fixedly arranged on the first bracket; the first push rod 35 is arranged on the same side as the first slide rail 36 and away from the second slide rail 36. On the base 1; the second push rod 37 is movably arranged in the first and second slide rails 36; one side of the second push rod 37 is hinged with the first push rod 35, and the first push rod 35 is away from the first push rod 35. The side of the tension spring 34 is fixedly connected to the second slide block 38; one end of the tension spring 34 is sleeved on the fixed block 33, and the other end of the tension spring 34 is fixedly connected to the first push rod 35; the push frame 39 is fixedly arranged away from the second slide block 38. One side of the second push rod 37; the push frame 39 is provided with a plurality of fixing rods 391 that cooperate with the second fixing holes 522 and the first fixing holes.

When the rotating disk 52 needs to be replaced, the operator can push and pull the first push rod 35. When pushing, the first push rod 35 drives the second push rod 37 to move horizontally in the direction of the second slide block 38, thus realizing the push frame 39. Stay away from the rotating disk 52. After the rotating disk 52 is replaced, the operator releases the first push rod 35. Under the elastic force of the tension spring 34, the first push rod 35 drives the second push rod 37 and the second slider 38 to reset. , and then drive the push frame 39 to reset.

Referring to Figures 1 to 10, the scraping device 6 includes an arc scraper 61, a horizontal moving mechanism 62 and a lifting mechanism 63;

The number of horizontal moving mechanisms 62 is three, and the horizontal moving mechanisms 62 are fixedly arranged on the side of the push frame 39 away from the rotating disk 52;

The number of lifting mechanisms 63 is consistent with the number of horizontal moving mechanisms 62, and the lifting mechanisms 63 are fixedly arranged on the horizontal moving mechanism 62;

The arc scraper 61 is fixedly arranged at the output end of the lifting mechanism 63 .

When the PE pipe fittings are discharged through the grinding hole 521, the horizontal moving mechanism 62 drives the lifting mechanism 63 and the arc scraper 61 to move. The lifting mechanism 63 can adjust the distance between the scraper and the pipe according to the outer diameter of the pipe, thereby realizing the scraper. It can scrape the outer walls of PE pipes with different diameters, thereby increasing the scraper's scraping range, thereby increasing practicality.

As shown in FIG. 10 , the horizontal moving mechanism 62 includes a third slide rail 621 . The third slide block 622 and the fixing bolts 623; the third slide rail 621 is fixedly provided on the side of the push frame 39 away from the rotating disk 52, and a plurality of third fixing holes 6211 are provided on the third slide rail 621; the third slide block 622 It is slidably provided on the third slide rail 621, and the third slide block 622 is provided with a fourth fixing hole; the fixing bolt 623 is fixedly provided on the third fixing hole 6211 and the fourth fixing hole.

By moving the third slider 622, the lifting mechanism 63 can move along the third slide rail 621 with the third slider 622 at the same time, thereby realizing the function of horizontal movement of the lifting mechanism 63. When moving to a designated position, the lifting mechanism 63 is fixed by the fixing bolt. 623 is fixed, so that the lifting mechanism 63 is fixed, increasing practicality.

Referring to Figure 10, the lifting mechanism 63 includes a fourth slide rail 631 and a fourth slide block 632; the fourth slide rail 631 is fixedly provided on the side of the third slide block 622 away from the third slide rail 621; the fourth slide block 632 The slide is provided on the fourth slide rail 631.

Through the cooperative sliding of the fourth slider 632 and the fourth slide rail 631, the fourth slider 632 drives the arc scraper 61 to move up and down, thereby scraping materials according to PE pipes of different sizes.

As shown in Figures 1 to 7, the feeding device 2 includes a feeding hopper 21;

The feed hopper 21 is fixedly arranged above the extrusion tube 12. The feed hopper 21 is provided with a sealing cover 211. The sealing cover 211 is hingedly connected with the feed hopper 21.

When processing is required, the material is fed through the feed port. After the feeding is completed, the feed port is sealed by the sealing cover 211 to prevent dust from entering during the processing, thereby reducing the qualification rate of product production.

Referring to Figures 1 to 7, the first sealing mechanism 41 has the same structure as the second sealing mechanism 42. The first sealing mechanism 41 includes a sealing ring and a sealing groove 411; the sealing ring is fixedly arranged on the extrusion tube 12 close to the rotating disk 52. On one side; the sealing groove 411 is fixedly provided on the rotating disk 52.

When the pushing mechanism presses the rotating disc 52, the sealing between the extruded tube 12 and the rotating disc 52 is increased through the cooperation between the sealing ring and the sealing groove 411, so that the extruded tube 12 has good performance during extrusion. Sealing performance, thereby increasing the qualification rate of pipe fittings processing.

As shown in Figures 1 to 10, the arc scraper 61 is provided with a scraper brush; through the setting of the scraper brush, the cleaning effect on the outer wall of the pipe is achieved after the scraper scrapes, ensuring the cleanliness of the outer wall of the pipe diameter. , thereby increasing practicality.

The above embodiments only express one or several implementation modes of the present invention, and their descriptions are relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the patent of the present invention should be determined by the appended claims.

Claims (10)

1. The utility model provides a PE water pipe extrusion molding technology of saving cost, adopt the extruder to carry out the extrusion molding of PE water pipe, a serial communication port, the extruder includes base (1), be provided with extrusion pipe (12) and pneumatic cylinder (11) on base (1), the output of pneumatic cylinder (11) is provided with the push plate, the push plate extends to extrusion pipe (12) inside, feed arrangement (2) set up the top at extrusion pipe (12), one side of base (1) is fixed to be provided with pusher (3), be provided with automatic switching device (5) between pusher (3) and extrusion pipe (12), sealing device (4) include first sealing mechanism (41) and second sealing mechanism (42), first sealing mechanism (41) set up between pusher (3) and extrusion pipe (12), second sealing mechanism (42) set up between automatic switching device (5) and pusher (3), scraper (6) are fixed to be set up the output at pusher (3).

2. A cost-effective PE water pipe extrusion process according to claim 1, characterized in that the automatic switching device (5) comprises an indexing disc (51), a rotating disc (52) and a clamping device (53);

the dividing disc (51) is fixedly arranged on the extension frame beside the base (1);

the rotating disc (52) is fixedly arranged at the output end of the dividing disc (51), a plurality of grinding tool holes (521) with different types are formed in the rotating disc (52), and a plurality of second fixing holes (522) are formed in the outer side of each grinding tool hole (521);

the clamping device (53) is fixedly arranged inside the dividing disc (51).

3. The process for extrusion molding of a PE water pipe with reduced cost according to claim 2, wherein the clamping device (53) comprises a first clamping mechanism (531) and a second clamping mechanism (532), the first clamping mechanism has the same structure as the second clamping mechanism, the first clamping mechanism (531) and the second clamping mechanism (532) are respectively arranged at the left side and the right side of the index plate (51) in a mirror image manner, and the first clamping mechanism further comprises a pull rod and a spring;

one end of the pull rod is hinged with the dividing disc (51), and the other end of the pull rod penetrates through the inner wall of the dividing disc (51) and extends to the outer wall of the dividing disc (51);

the spring is fixedly arranged between the pull rod and the dividing disc (51).

4. A cost-effective extrusion process for PE water pipes according to claim 1, characterized in that the pushing device (3) comprises a first slide rail (31), a first slide block (32), a fixed block (33), a tension spring (34), a first push rod (35), a second slide rail (36), a second push rod (37), a second slide block (38) and a pushing frame (39);

the first sliding rail (31) is fixedly arranged on one side of the base (1) far away from the dividing disc (51);

the first sliding block (32) is arranged on the first sliding rail (31) in a sliding way;

the fixed block (33) is fixedly arranged on the base (1) and is positioned at one side of the dividing disc (51);

the first push rod (35) is fixedly arranged on the first bracket; the first push rod (35) is far away from

The second sliding rail (36) and the first sliding rail (31) are arranged on the same side of the first base (1);

the second push rod (37) is movably arranged in the first and second slide rails (36); one side of the second push rod (37) is hinged with the first push rod (35), and one side of the first push rod (35) away from the first push rod (35) is fixedly connected with the second slide block (38);

one end of a tension spring (34) is sleeved on the fixed block (33), and the other end of the tension spring (34) is fixedly connected with a first push rod (35);

the pushing frame (39) is fixedly arranged at one side of the second sliding block (38) far away from the second push rod (37); the pushing frame (39) is provided with a plurality of fixing rods (391) matched with the second fixing holes (522) and the first fixing holes.

5. A cost-effective PE water pipe extrusion process according to claim 4, characterized in that the scraping means (6) comprises an arc-shaped scraper (61), a horizontal moving mechanism (62) and a lifting mechanism (63);

the number of the horizontal moving mechanisms (62) is three, and the horizontal moving mechanisms (62) are fixedly arranged on one side of the pushing frame (39) far away from the rotating disc (52);

the number of the lifting mechanisms (63) is consistent with that of the horizontal moving mechanisms (62), and the lifting mechanisms (63) are fixedly arranged on the horizontal moving mechanisms (62);

the arc scraper (61) is fixedly arranged at the output end of the love lifting mechanism (63).

6. The cost-effective PE water pipe extrusion molding process of claim 5, wherein the horizontal movement mechanism (62) comprises a third slide rail (621), a third slider (622) and a fixing bolt (623);

the third sliding rail (621) is fixedly arranged at one side of the pushing frame (39) far away from the rotating disc (52), and a plurality of third fixing holes (6211) are formed in the third sliding rail (621);

the third sliding block (622) is arranged on the third sliding rail (621) in a sliding manner, and a fourth fixing hole is formed in the third sliding block (622);

the fixing bolt (623) is fixedly arranged on the third fixing hole (6211) and the fourth fixing hole.

7. A cost-effective PE water pipe extrusion process according to claim 5, wherein the lifting mechanism (63) comprises a fourth slide rail (631) and a fourth slide block (632);

the fourth sliding rail (631) is fixedly arranged at one side of the third sliding block (622) far away from the third sliding rail (621);

the fourth slider (632) is slidably disposed on the fourth slide rail (631).

8. A cost-effective PE water pipe extrusion process according to claim 1, characterized in that the feeding device (2) comprises a feed hopper (21);

the feed hopper (21) is fixedly arranged above the extrusion pipe (12), a sealing cover (211) is arranged on the feed hopper (21), and the sealing cover (211) is hinged with the feed hopper (21).

9. A cost-effective PE water pipe extrusion process according to claim 2, characterized in that the first sealing means (41) is identical in structure to the second sealing means (42), the first sealing means (41) comprising a sealing ring and a sealing groove (411);

the sealing ring is fixedly arranged on one side of the extrusion pipe (12) close to the rotating disc (52);

the seal groove (411) is fixedly arranged on the rotating disc (52).

10. The cost-effective extrusion process of PE pipe according to claim 5, characterized in that a scraper brush is provided on the arc-shaped scraper (61).