Three-layer co-extrusion plastic pipeline and extrusion molding device thereof

Abstract

The invention relates to the technical field of a three-layer co-extrusion plastic pipeline and an extrusion molding device thereof.The three-layer co-extrusion plastic pipeline comprises a workbench, a feeding cavity pipe is arranged on the left side of the upper end face of the workbench, and a feeding pipe is fixedly mounted at the right end of the feeding cavity pipe; a co-extrusion assembly is arranged at the right end of the feeding pipe, an adjusting assembly is arranged at the left end of the co-extrusion assembly and comprises a rectangular frame, and the rectangular frame is fixedly installed at the left end of the co-extrusion assembly; a second gear ring is rotationally mounted on the inner side of the rectangular frame; under the action of the outer-layer pipe, the middle-layer pipe and the inner-layer pipe, three layers of pipelines can be synchronously extruded at the same time, then fusion and adhesion operation is carried out in the shell, so that the situation that the pipelines are not firm after fusion can be avoided, the situation that the operation efficiency is low can be solved, and in addition, the adjusting assembly is matched to adjust the working efficiency. Materials of different layers of pipelines are adjusted in real time, so that the situation that materials in other pipelines are extruded due to excessive materials in the pipelines can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic pipe forming devices, and in particular to a three-layer co-extruded plastic pipe and its extrusion forming device. Background Art

[0002] In the prior art of three-layer co-extruded plastic pipes, the production process of three-layer co-extruded plastic pipes often involves multiple steps and complex equipment configurations. When manufacturing three-layer co-extruded plastic pipes with traditional extrusion forming devices, plastics of different materials usually need to be extruded through different extruders respectively and then fused in a mold.

[0003] This production method is not only inefficient, but also difficult to ensure the tight combination and uniformity between the layers of the pipe. In addition, when cutting the pipe with traditional extrusion forming devices, there are often problems such as uneven cutting and inaccurate dimensions, which affect the quality of the pipe and its subsequent use effect.

[0004] Therefore, how to provide a device for efficiently and accurately producing three-layer co-extruded plastic pipes and its extrusion forming device has become an urgent problem to be solved currently. Summary of the Invention

[0005] The purpose of the present invention is to provide a three-layer co-extruded plastic pipe and its extrusion forming device to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A three-layer co-extruded plastic pipe and its extrusion forming device, including a workbench, a feeding cavity pipe is arranged on the left side of the upper end surface of the workbench, and a feeding pipe is fixedly installed at the right end of the feeding cavity pipe;

[0007] A co-extrusion assembly is arranged at the right end of the feeding pipe, an adjusting assembly is arranged at the left end of the co-extrusion assembly, the adjusting assembly includes a rectangular frame, and the rectangular frame is fixedly installed at the left end of the co-extrusion assembly;

[0008] A second gear ring is rotatably installed inside the rectangular frame, an adjusting plate is annularly arranged on the left side of the second gear ring, chute plates are fixedly installed annularly and evenly on the left side inside the rectangular frame, and a first partition is fixedly installed on the outer side of the left end of the rectangular frame;

[0009] A housing is fixedly installed at the right end of the co-extrusion assembly, a rotating shaft is rotatably arranged inside the housing, arc-shaped plates are annularly and evenly arranged on the outer circumferential surface of the rotating shaft, and inclined plates are hinge-rotatably installed at the left ends of the arc-shaped plates.

[0010] Preferably, a circular ring is fixedly installed at the right end of the workbench. A first annular groove is formed inside the circular ring. A first through opening is formed on the upper end surface of the first annular groove. A first motor is fixedly installed on the upper end surface of the circular ring. A first gear is fixedly installed on the output shaft of the first motor.

[0011] Preferably, a first gear ring is rotatably installed inside the first annular groove. The first gear ring and the first gear are meshed with each other. A first telescopic pump is fixedly installed on the inner circumferential surface of the first gear ring in a circumferentially uniform array. A second motor in a symmetric state is fixedly installed on the telescopic rod of the first telescopic pump. Blades are fixedly installed on the output shafts of two adjacent second motors.

[0012] Preferably, an installation box is fixedly installed on the left side of the upper end surface of the workbench. A third motor is fixedly installed on the upper left side of the installation box. The output shaft of the third motor is fixedly installed inside the installation box with a main gear. A secondary gear is rotatably installed vertically in the installation box. The number of the secondary gears is three. The secondary gears are meshed with each other, and the upper secondary gear is meshed with the main gear.

[0013] Preferably, the right end surface of the installation box is fixedly connected to a feeding cavity pipe. The number of the feeding cavity pipes is three. A heater is fixedly installed on the outer circumferential surface of the feeding cavity pipe. A conveying auger is rotatably installed inside the feeding cavity pipe. The left end of the conveying auger is fixedly connected to the adjacent secondary gear.

[0014] Preferably, a material box is fixedly installed on the outside of the feeding cavity pipe. A fourth motor is fixedly installed on the upper end surface of the material box. A stirring shaft is fixedly installed on the output shaft of the fourth motor inside the material box. A feeding pipe is fixedly installed on the upper circumferential surface of the material box.

[0015] Preferably, the coextrusion assembly includes an outer layer pipe. A middle layer pipe is arranged inside the outer layer pipe. An inner layer pipe is arranged inside the middle layer pipe. An intermediate column is fixedly installed inside the inner layer pipe.

[0016] Preferably, a second annular groove is formed inside the rectangular frame. A second through opening is formed on the outside of the rectangular frame. A fifth motor is fixedly installed on the outer side surface of the rectangular frame. A second gear is fixedly installed on the output shaft of the fifth motor. The second gear is meshed with a second gear ring. The second gear ring is rotatably installed inside the second annular groove. A second partition is fixedly installed at the right end of the rectangular frame. The second partition is fixedly connected to the outer side surface of the middle layer pipe. A third partition is fixedly installed on the outer side surface of the middle layer pipe. The third partition is fixedly connected to the left end of the outer layer pipe. An adjusting assembly is arranged on the outer circumferential surfaces of the left ends of the middle layer pipe and the outer layer pipe. The outside of the adjusting assembly is fixedly connected to the adjacent feeding pipe.

[0017] Preferably, a sixth motor is fixedly installed at the left end of the rotating shaft. The sixth motor is fixedly installed inside the middle column. Installation grooves are evenly arranged in a circular array on the circumferential surface of the rotating shaft. Second telescopic pumps are fixedly installed at both ends inside the installation grooves. The telescopic parts of the second telescopic pumps are fixedly connected to the inner side surfaces of the qualified arc-shaped plates. An adjusting assembly is fixedly installed at the right end of the outer shell. A rectangular frame in the adjusting assembly at the right end is fixedly installed with a cooling box. A protective shell is fixedly installed from the inside to the outer side at the right end of the cooling box. The left end of the protective shell is fixedly connected to the right end of the adjacent rectangular frame. A delivery pipe is fixedly installed on the lower outer surface of the cooling box. A cooler is fixedly installed on the inner side of the lower end of the delivery pipe. The cooler is fixedly installed on the upper end surface of the workbench.

[0018] A three-layer co-extruded plastic pipe forming method includes the following steps:

[0019] Step 1: Feed the raw materials into the inside of the material box through the feed pipe. Start the fourth motor. The output shaft of the fourth motor drives the stirring shaft to rotate, allowing the raw materials to enter the corresponding feeding cavity pipe.

[0020] Step 2: Start the third motor. The output shaft of the third motor drives the main gear to rotate. The main gear rotation drives the meshing sub-gear to rotate. By analogy, the three sub-gears rotate synchronously. The sub-gear rotation drives the conveying auger to rotate, gradually conveying the raw materials into the inside of the feed pipe.

[0021] Step 3: When the raw materials are inside the feeding cavity pipe, start the heater. The heater dissolves the passing raw materials, turning the solid raw materials into liquid.

[0022] Step 4: The liquid material passes through the feed pipe and then through the adjusting assembly.

[0023] Step 5: According to the situation, start the fifth motor on the adjusting assembly. The output shaft of the fifth motor drives the second gear to rotate. When the second gear rotates, it drives the second gear ring to rotate synchronously. When the second gear ring rotates, it can rotate the adjusting plate under the action of the slider and the sliding column and the cooperation of the hexagonal groove and the chute, thereby adjusting the diameter of the internal opening and further adjusting the amount of material entering.

[0024] Step 6: The liquid material enters the inside of the co-extrusion assembly and then combines together.

[0025] Step 7: Start the second telescopic pump. The second telescopic pump drives the arc-shaped plate to expand outwards, thereby driving the inclined plate to rotate. Start the sixth motor. The output shaft of the sixth motor drives the rotating shaft to rotate. The rotating shaft drives the second telescopic pump. The second telescopic pump drives the arc-shaped plate to rotate. The arc-shaped plate drives the inclined plate to rotate.

[0026] Step 8: The fused material enters the interior of the cooling box and slides along the protective shell. Start the cooler, and the cooler cools the water source inside the delivery pipe.

[0027] Step 9: The fused three-layer pipe slides into the interior of the ring. Start the first motor. The output shaft of the first motor drives the first gear to rotate. The first gear drives the first gear ring to rotate. The first gear ring drives the first telescopic pump. The first telescopic pump drives the second motor. The second motor drives the blade. Start the second motor, and the output shaft of the second motor drives the blade to rotate for cutting.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] 1. In the present invention, in the co-extrusion assembly, under the action of the outer layer pipe, the middle layer pipe, and the inner layer pipe, the three-layer pipes can be simultaneously extruded synchronously, and then fused and adhered inside the outer shell, thereby avoiding the situation of unreliable fusion after fusion and solving the problem of low operation efficiency. Moreover, in cooperation with the adjustment assembly, the materials of different layers of pipes can be adjusted in real time, thereby avoiding the situation that the pipes are overloaded with materials and squeezing the materials of other pipes, and then ensuring that the thickness of the generated three-layer pipes is in the same state.

[0030] 2. In the present invention, under the action of the second telescopic pump, the arc-shaped plate can expand outwards. Under the action of the expansion, the shape between the just-fused pipes can be changed. Then, under the action of the sixth motor, the rotating shaft can drive the arc-shaped plate to rotate. On the one hand, it can ensure the flatness inside the pipe, and on the other hand, it can ensure that the just-fused materials do not have product defects.

[0031] 3. In the present invention, under the action of the first motor and the first gear, the first gear ring can drive the first telescopic pump to rotate synchronously, so that the first telescopic pump can drive the second motor and the blade to rotate synchronously. Then, during the operation, the second telescopic pump can drive the second motor to perform a linear motion, so as to cope with three-layer pipes of different diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0033] Figure 1 It is the main structure diagram of the present invention;

[0034] Figure 2Schematic diagram of the installation box of the present invention;

[0035] Figure 3 Structural diagram of the feeding cavity tube of the present invention;

[0036] Figure 4 Structural diagram of the material box of the present invention;

[0037] Figure 5 Schematic diagram of the feeding cavity tube and the co - extrusion assembly of the present invention;

[0038] Figure 6 Schematic diagram of the adjustment assembly of the present invention;

[0039] Figure 7 Internal schematic diagram of the co - extrusion assembly of the present invention;

[0040] Figure 8 Internal diagram of the outer shell of the present invention;

[0041] Figure 9 Structural diagram of the arc plate of the present invention;

[0042] Figure 10 Schematic diagram of the cooling box and the cooler of the present invention;

[0043] Figure 11 Structural diagram of the first gear ring and the blade of the present invention.

[0044] Explanation of reference numerals:

[0045] 1, workbench; 101, circular ring; 102, first annular groove; 103, first through - hole; 104, first gear ring; 105, first motor; 106, first gear; 107, first telescopic pump; 108, second motor; 109, blade;

[0046] 2, installation box; 201, third motor; 202, main gear; 203, auxiliary gear; 204, feeding cavity tube; 205, heater; 206, conveying auger; 3, material box; 301, fourth motor; 302, stirring shaft; 303, feed pipe; 4, feed pipe;

[0047] 5, co - extrusion assembly; 501, outer layer tube; 502, middle layer tube; 503, inner layer tube; 504, intermediate column;

[0048] 6, adjustment assembly; 601, rectangular frame; 602, second annular groove; 603, second through - hole; 604, fifth motor; 605, second gear; 606, second gear ring; 607, hexagonal groove; 608, adjusting plate; 609, chute plate; 610, chute; 611, first partition board; 612, second partition board; 613, third partition board;

[0049] 7. Housing; 701. Sixth motor; 702. Rotating shaft; 703. Installation groove; 704. Second telescopic pump; 705. Arc plate; 706. Inclined plate; 8. Cooling box; 9. Protective shell; 10. Cooler; 11. Delivery pipe. Detailed implementation manner

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0051] Please refer to Figures 1 to 11 , the present invention provides a technical solution: including a workbench 1, a vertical plate is fixedly installed at the center position of the right end face of the workbench 1, a circular ring 101 is fixedly installed at the top of the vertical plate, the left side to the right side of the circular ring 101 is a through structure, and a first ring groove 102 is opened on the inner circumferential surface, as Figure 11 shown.

[0052] A first through hole 103 leading to the inside is opened at the center position of the top of the circular ring 101. Then, a first motor 105 is fixedly installed at the edge position of the first through hole 103 at the center position of the top of the circular ring 101. A first gear 106 is fixedly installed on the output shaft of the first motor 105, and the first gear 106 can pass through the first through hole 103 and be located inside the first ring groove 102. A first gear ring 104 is rotatably installed inside the first ring groove 102, and the first gear ring 104 and the first gear 106 are meshed with each other. During the rotation of the first gear 106, the first gear ring 104 will be driven to rotate, so that the first gear ring 104 can rotate inside the first ring groove 102, as Figure 11 shown.

[0053] A plurality of first telescopic pumps 107 are fixedly installed on the inner circumferential surface of the first gear ring 104 in a circumferentially and uniformly arranged manner. The outer end of the telescopic rod of the first telescopic pump 107 is in a U-shaped structure. And at the outer end of the telescopic rod, and inside the U-shaped structure, a pair of symmetrically arranged second motors 108 are fixedly installed. A blade 109 is fixedly installed on the output shafts of two adjacent second motors 108 together, as Figure 11 shown.

[0054] During use, start the first motor 105. The first motor 105 drives the first gear 106 to rotate. The first gear 106 drives the first gear ring 104 to rotate. The first gear ring 104 drives the first telescopic pump 107. The first telescopic pump 107 drives the second motor 108. The second motor 108 drives the blade 109 to rotate.

[0055] Start the first telescopic pump 107. The telescopic rod of the first telescopic pump 107 drives the second motor 108 to move. The second motor 108 drives the blade 109 to perform a linear motion. Start the second motor 108. The output shaft of the second motor 108 drives the blade 109 to rotate. The blade 109 cuts the passing pipeline.

[0056] On the upper left side near the edge of the upper end surface of the workbench 1, a vertically installed installation box 2 is fixedly installed. On the upper left side of the upper part of the installation box 2, a third motor 201 is fixedly installed. The output shaft of the third motor 201 is fixedly installed with a main gear 202 inside the installation box 2. Then, on the right side inner surface of the installation box 2, three sub-gears 203 are rotatably installed vertically and evenly. The three sub-gears 203 mesh with each other, and the top sub-gear 203 meshes with the main gear 202, as Figure 2 shown.

[0057] During use, start the third motor 201. The output shaft of the third motor 201 drives the main gear 202 to rotate. The main gear 202 drives the top sub-gear 203 to rotate, thereby driving the middle sub-gear 203 to rotate, and further driving the bottom sub-gear 203 to rotate.

[0058] On the right end surface of the installation box 2, three feeding chamber pipes 204 are fixedly installed vertically and evenly. Inside the feeding chamber pipes 204, conveying augers 206 are provided. The left ends of the conveying augers 206 are fixedly connected to the center positions of the right end surfaces of the adjacent sub-gears 203. It should be noted that when the sub-gear 203 drives the conveying auger 206 to rotate, the feeding direction is to move to the right, and the situation of continuously opposite states will not occur.

[0059] On the outer right side of the feeding chamber pipe 204, a heater 205 is fixedly installed. The heater 205 can heat the raw materials passing through the inside of the feeding chamber pipe 204 to turn solids into liquids, and then transport them to the next process.

[0060] Secondly, circular pipes are fixedly installed on the outer side surfaces of the left ends of each feeding cavity pipe 204. The pipes and the feeding cavity pipes 204 are in a through state. Moreover, a material box 3 is fixedly installed on the top of each pipe. A fourth motor 301 is fixedly installed on the outer top of the material box 3. A stirring shaft 302 is fixedly installed on the output shaft of the fourth motor 301 inside the material box 3. An inlet pipe 303 is fixedly installed on the circumferential surface of the upper end of the material box 3. Feeding pipes 4 are fixedly installed on the right ends of the feeding cavity pipes 204, as Figure 1 shown.

[0061] During use, solid raw materials enter the inside of the material box 3 through the inlet pipe 303 by an external structure. The fourth motor 301 is started. The output shaft of the fourth motor 301 drives the stirring shaft 302 to rotate. The rotation of the stirring shaft 302 makes the raw materials move, preventing accumulation. Then, the raw materials pass through the pipes and enter the corresponding feeding cavity pipes 204. Then, they are heated into a liquid and enter the inside of the feeding pipe 4 under the action of the conveying auger 206, as Figure 1 shown.

[0062] A co-extrusion assembly 5 is provided at the right end of the feeding pipe 4. Among them, the co-extrusion assembly 5 includes an outer layer pipe 501, a middle layer pipe 502 located inside the outer layer pipe 501, and an inner layer pipe 503 located inside the middle layer pipe 502, as Figure 7 shown. A middle column 504 is fixedly installed inside the inner layer pipe 503. It should be noted that the middle column 504 and the inner layer pipe 503 are fixedly connected by two symmetric connecting rods, and the flow of liquid materials will not be affected during operation.

[0063] A third partition 613 of the adjustment assembly 6 is fixedly installed on the outer circumferential surface of the middle layer pipe 502 at the left end of the outer layer pipe 501. A second partition 612 is fixedly installed on the outer circumferential surface of the inner layer pipe 503 at the left end of the middle layer pipe 502. In this way, the left end of the middle layer pipe 502 can be sealed, and the outer side surface of the left end of the outer layer pipe 501 can be sealed, as Figure 5 shown.

[0064] It should be noted that the distances between the outer layer pipe 501, the middle layer pipe 502, and the inner layer pipe 503 are in the same state.

[0065] Three adjustment assemblies 6 are fixedly installed on the circumferential surface of the left end of the outer layer pipe 501, the circumferential surface of the left end of the middle layer pipe 502, and the inner layer pipe 503. And a single adjustment assembly 6 is fixedly installed at the left end of the middle layer pipe 502. A first partition 611 is fixedly installed on the outside of each adjustment assembly 6. The central position of the first partition 611 is fixedly connected to the adjacent feeding pipe 4 and is in a through state, as Figure 1 shown.

[0066] AsFigure 6 As shown in the figure, the adjusting component 6 includes a rectangular frame 601. The center position from the left side to the right side of the rectangular frame 601 is in a through state. Moreover, a second annular groove 602 is formed on the inner circumferential surface of the rectangular frame 601, and a second through port 603 is formed on the upper end surface of the rectangular frame 601. A fifth motor 604 is fixedly installed at the edge of the upper end of the rectangular frame 601 at the second through port 603. A second gear 605 is fixedly installed on the output shaft of the fifth motor 604. And a second gear ring 606 is rotatably installed inside the second annular groove 602. The second gear ring 606 meshes with the second gear 605.

[0067] During use, start the fifth motor 604. The output shaft of the fifth motor 604 drives the second gear 605 to rotate, and the second gear 605 drives the second gear ring 606 to rotate.

[0068] A hexagonal groove 607 is formed on the left side surface of the second gear ring 606. And six adjusting plates 608 are arranged in an annular array on the left side surface of the second gear ring 606 in a fitting manner. A slider is fixedly installed at the position of the outer straight edge corner of the adjusting plate 608, and the slider is slidably installed inside the hexagonal groove 607. And a sliding column is fixedly installed at the center position of the left straight edge of the adjusting plate 608.

[0069] Six inclined chute plates 609 are fixedly installed in an annular array at the position of the inner left edge of the rectangular frame 601. A chute 610 is formed from the left side surface to the right side surface of the chute plate 609, and the sliding column is slidably installed inside the chute 610.

[0070] During the use process, the second gear ring 606 rotates, so that the slider can slide inside the hexagonal groove 607, and then the adjusting plate 608 can be driven to rotate. The rotation of the adjusting plate 608 will drive the sliding column to slide inside the chute 610, so as to change the diameter of the central through hole of the second gear ring 606, and then change the feeding flow rate, as Figure 6 shown.

[0071] It should be noted that the adjusting components 6 on the circumferential surfaces of the outer layer pipe 501 and the middle layer pipe 502 also have the same effect as above. And the outer circumferential surfaces of the outer layer pipe 501 and the middle layer pipe 502 are fixedly connected to the inner side surfaces of the pipes and the adjusting components 6.

[0072] A housing 7 is fixedly installed at the right end of the co-extrusion component 5. The inner diameter of the housing 7 is the same as the outer diameter of the right end of the co-extrusion component 5. A rotating shaft 702 is arranged inside the housing 7. And a sixth motor 701 is fixedly installed at the left end of the rotating shaft 702. The output shaft of the sixth motor 701 is fixedly connected to the rotating shaft 702. The sixth motor 701 is fixedly installed inside the right end of the middle column 504.

[0073] On the circumferential surface of the rotating shaft 702, six mounting grooves 703 are evenly arranged in an annular array. At both ends inside the mounting grooves 703, symmetric second telescopic pumps 704 are fixedly installed. On the telescopic rods of the two horizontally arranged second telescopic pumps 704, an arc-shaped plate 705 is fixedly installed together. The left end of the arc-shaped plate 705 is hingedly installed with an inclined plate 706. The structural combination of the six inclined plates 706 can form a frustum structure.

[0074] During the use process, after the three liquids are fused, they enter the inside of the outer shell 7 and then flow to the outer side of the arc-shaped plate 705. At this time, according to the situation, the second telescopic pump 704 is started. The telescopic rod of the second telescopic pump 704 pushes the arc-shaped plate 705 to expand outwards, thereby being able to change the internal diameter of the fused three-layer pipe. At this time, in order to avoid adverse situations at the gaps of the arc-shaped plate 705, the sixth motor 701 is started. The output shaft of the sixth motor 701 drives the rotating shaft 702 to rotate. The rotating shaft 702 drives the second telescopic pump 704 to rotate. The second telescopic pump 704 drives the arc-shaped plate 705. When the arc-shaped plate 705 rotates, it can perform a grinding operation on the inner wall of the three-layer pipe, ensuring the smoothness of the inner wall.

[0075] It should be noted that due to the action of the inclined plate 706, the accumulation of the fused liquid material can be avoided, and the liquid material moves along the inclined plate 706 to the outer side of the arc-shaped plate 705.

[0076] The right end of the outer shell 7 is fixedly installed with an adjusting component 6. This adjusting component 6 is used to support the outside of the fused pipe to avoid collapse and outward expansion.

[0077] The right end of the right-end adjusting component 6 is fixedly installed with a cooling box 8. Inside the cooling box 8, a protective shell 9 is fixedly installed. It should be noted that there is a gap between the inside of the cooling box 8 and the protective shell 9 for filling water. The left end of the protective shell 9 is fixedly connected to the adjacent adjusting component 6, and the right end is located outside the cooling box 8, as Figure 1 shown.

[0078] At both lower ends of the cooling box 8, conveying pipes 11 are fixedly installed. The left conveying pipe 11 is for discharging materials, and the right conveying pipe 11 is for feeding materials. A cooler 10 is fixedly installed between the two conveying pipes 11. The cooler 10 performs a cooling operation on the passing water source. It should be noted that a water pump is fixedly installed between the right conveying pipe 11 and the cooler 10 for the conveying operation of the water source, thereby ensuring the sufficiency of the water source inside the cooling box 8.

[0079] Working principle: Step 1: Feed the raw materials into the inside of the material box 3 through the feed pipe 303. Start the fourth motor 301. The output shaft of the fourth motor 301 drives the stirring shaft 302 to rotate, allowing the raw materials to enter the corresponding feeding cavity pipe 204.

[0080] Step 2: Start the third motor 201. The output shaft of the third motor 201 drives the main gear 202 to rotate. The rotation of the main gear 202 drives the engaged secondary gear 203 to rotate. And so on, the three secondary gears 203 rotate synchronously. The rotation of the secondary gear 203 drives the conveying auger 206 to rotate, gradually conveying the raw materials into the interior of the feeding pipe 4;

[0081] Step 3: When the raw materials are inside the feeding cavity pipe 204, start the heater 205. The heater 205 performs a dissolving operation on the passing raw materials to turn the solid raw materials into liquid;

[0082] Step 4: The liquid material passes through the feeding pipe 4 and then through the adjustment assembly 6;

[0083] Step 5: According to the situation, start the fifth motor 604 on the adjustment assembly 6. The output shaft of the fifth motor 604 drives the second gear 605 to rotate. When the second gear 605 rotates, it drives the second gear ring 606 to rotate synchronously. When the second gear ring 606 rotates, it can, under the action of the slider and slide column and with the cooperation of the hexagonal groove 607 and the chute 610, make the adjustment plate 608 rotate, thereby being able to adjust the diameter of the internal opening and further adjust the amount of material entering;

[0084] Step 6: The liquid material enters the interior of the co-extrusion assembly 5 and then combines together;

[0085] Step 7: Start the second telescopic pump 704. The second telescopic pump 704 drives the arc plate 705 to expand outwards, thereby driving the inclined plate 706 to rotate. Start the sixth motor 701. The output shaft of the sixth motor 701 drives the rotating shaft 702 to rotate. The rotating shaft 702 drives the second telescopic pump 704. The second telescopic pump 704 drives the arc plate 705 to rotate. The arc plate 705 drives the inclined plate 706 to rotate;

[0086] Step 8: The fused material enters the interior of the cooling box 8 and, and slides along the protective shell 9. Start the cooler 10. The cooler 10 cools the water source inside the conveying pipe 11;

[0087] Step 9: The fused three-layer pipe slides into the interior of the ring 101. Start the first motor 105. The output shaft of the first motor 105 drives the first gear 106 to rotate. The first gear 106 drives the first gear ring 104 to rotate. The first gear ring 104 drives the first telescopic pump 107. The first telescopic pump 107 drives the second motor 108. The second motor 108 drives the blade 109. Start the second motor 108. The output shaft of the second motor 108 drives the blade 109 to rotate for cutting.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A three-layer co-extrusion plastic pipe extrusion molding device, characterized in that: It includes a workbench (1). On the left side of the upper end surface of the workbench (1), a feeding cavity tube (204) is provided, and a feeding tube (4) is fixedly installed at the right end of the feeding cavity tube (204). At the right end of the feeding tube (4), a co-extrusion assembly (5) is provided. At the left end of the co-extrusion assembly (5), an adjusting assembly (6) is provided. The adjusting assembly (6) includes a rectangular frame (601), and the rectangular frame (601) is fixedly installed at the left end of the co-extrusion assembly (5). A second gear ring (606) is rotatably installed inside the rectangular frame (601). An adjusting plate (608) is annularly arranged on the left side of the second gear ring (606). Inside the left side of the rectangular frame (601), chute plates (609) are fixedly installed in a circular array evenly. A first partition plate (611) is fixedly installed on the outer side of the left end of the rectangular frame (601). At the right end of the co-extrusion assembly (5), a housing (7) is fixedly installed. A rotating shaft (702) is rotatably arranged inside the housing (7). Arc-shaped plates (705) are annularly arranged evenly on the outer circumferential surface of the rotating shaft (702). Oblique plates (706) are hinge-rotatably installed at the left ends of the arc-shaped plates (705).

2. The extrusion molding device for a three-layer co-extruded plastic pipe according to claim 1, characterized in that: At the right end of the workbench (1), a circular ring (101) is fixedly installed. A first ring groove (102) is formed inside the circular ring (101). A first through hole (103) is formed on the upper end surface of the first ring groove (102). A first motor (105) is fixedly installed on the upper end surface of the circular ring (101). A first gear (106) is fixedly installed on the output shaft of the first motor (105).

3. The extrusion molding device for a three-layer co-extruded plastic pipe according to claim 2, characterized in that: A first gear ring (104) is rotatably installed inside the first ring groove (102). The first gear ring (104) and the first gear (106) are meshed with each other. First telescopic pumps (107) are fixedly installed in a circular array evenly on the inner circumferential surface of the first gear ring (104). Second motors (108) in a symmetric state are fixedly installed on the telescopic rods of the first telescopic pumps (107). Blades (109) are fixedly installed on the output shafts of two adjacent second motors (108).

4. A three-layer coextrusion plastic pipe extrusion forming device according to claim 1, characterized in that: On the left side of the upper end surface of the workbench (1), an installation box (2) is fixedly installed. A third motor (201) is fixedly installed on the upper left side of the installation box (2). A main gear (202) is fixedly installed on the output shaft of the third motor (201) inside the installation box (2). A secondary gear (203) is rotatably installed vertically in the installation box (2). The number of the secondary gears (203) is three. The secondary gears (203) are meshed with each other, and the upper secondary gear (203) is meshed with the main gear (202).

5. The extrusion molding device for a three-layer co-extruded plastic pipe according to claim 4, wherein: The right end face of the installation box (2) is fixedly connected to the feeding cavity pipe (204). The number of the feeding cavity pipes (204) is three. A heater (205) is fixedly installed on the outer circumferential surface of the feeding cavity pipe (204). A conveying auger (206) is rotatably installed inside the feeding cavity pipe (204). The left end of the conveying auger (206) is fixedly connected to the adjacent secondary gear (203).

6. The extrusion molding device for a three-layer co-extruded plastic pipe according to claim 5, characterized in that: A material box (3) is fixedly installed on the outside of the feeding cavity pipe (204). A fourth motor (301) is fixedly installed on the upper end face of the material box (3). A stirring shaft (302) is fixedly installed on the output shaft of the fourth motor (301) inside the material box (3). A feed pipe (303) is fixedly installed on the upper circumferential surface of the material box (3).

7. A three-layer co-extrusion plastic pipe extrusion molding device according to claim 1, characterized in that: The co-extrusion assembly (5) includes an outer layer pipe (501). A middle layer pipe (502) is arranged inside the outer layer pipe (501). An inner layer pipe (503) is arranged inside the middle layer pipe (502). An intermediate column (504) is fixedly installed inside the inner layer pipe (503).

8. A three-layer co-extrusion plastic pipe extrusion molding device according to claim 1, characterized in that: A second annular groove (602) is formed inside the rectangular frame (601). A second through hole (603) is formed outside the rectangular frame (601). A fifth motor (604) is fixedly installed on the outer side face of the rectangular frame (601). A second gear (605) is fixedly installed on the output shaft of the fifth motor (604). The second gear (605) meshes with a second gear ring (606). The second gear ring (606) is rotatably installed inside the second annular groove (602). A second partition plate (612) is fixedly installed at the right end of the rectangular frame (601). The second partition plate (612) is fixedly connected to the outer side face of the middle layer pipe (502). A third partition plate (613) is fixedly installed on the outer side face of the middle layer pipe (502). The third partition plate (613) is fixedly connected to the left end of the outer layer pipe (501). An adjusting assembly (6) is arranged on the outer circumferential surfaces of the left ends of the middle layer pipe (502) and the outer layer pipe (501). The outside of the adjusting assembly (6) is fixedly connected to the adjacent feeding pipe (4).

9. The extrusion molding device for a three-layer co-extruded plastic pipe according to claim 1, characterized in that: A sixth motor (701) is fixedly installed at the left end of the rotating shaft (702). The sixth motor (701) is fixedly installed inside the middle column (504). Installation grooves (703) are evenly arranged in a circular array on the circumferential surface of the rotating shaft (702). At both ends inside the installation grooves (703), second telescopic pumps (704) are fixedly installed. The second telescopic pumps (704) are fixedly connected to the inner side surfaces of the telescopic qualified arc-shaped plates (705). An adjusting assembly (6) is fixedly installed at the right end of the outer shell (7). A cooling box (8) is fixedly installed in a rectangular frame (601) in the adjusting assembly (6) at the right end. A protective shell (9) is fixedly installed from the inside to the outer side at the right end of the cooling box (8). The left end of the protective shell (9) is fixedly connected to the right end of the adjacent rectangular frame (601). A delivery pipe (11) is fixedly installed on the lower outer surface of the cooling box (8). A cooler (10) is fixedly installed inside the lower end of the delivery pipe (11). The cooler (10) is fixedly installed on the upper end surface of the workbench (1).

10. A method for forming a three-layer co-extruded plastic pipe, according to any one of the three-layer co-extruded plastic pipe extrusion molding devices described in claims 1-9, characterized in that: It includes the following steps: Step 1: Feed the raw materials into the inside of the material box (3) through the feed pipe (303). Start the fourth motor (301). The output shaft of the fourth motor (301) drives the stirring shaft (302) to rotate, so that the raw materials enter the corresponding feeding cavity pipe (204). Step 2: Start the third motor (201). The output shaft of the third motor (201) drives the main gear (202) to rotate. The rotation of the main gear (202) drives the meshing secondary gear (203) to rotate. By analogy, the three secondary gears (203) rotate synchronously. The rotation of the secondary gears (203) drives the conveying auger (206) to rotate, so that the raw materials are gradually conveyed into the inside of the feed pipe (4). Step 3: When the raw materials are inside the feeding cavity pipe (204), start the heater (205). The heater (205) performs a dissolving operation on the passing raw materials to turn the solid raw materials into liquid. Step 4: The liquid material passes through the feed pipe (4), and then passes through the adjusting assembly (6). Step 5: According to the situation, start the fifth motor (604) on the adjusting assembly (6). The output shaft of the fifth motor (604) drives the second gear (605) to rotate. When the second gear (605) rotates, it drives the second gear ring (606) to rotate synchronously. When the second gear ring (606) rotates, under the action of the slider and slide column and the cooperation of the hexagonal groove (607) and the chute (610), the adjusting plate (608) can be rotated, so as to adjust the diameter of the internal opening, and further adjust the amount of material entering. Step 6: The liquid material enters the co-extrusion assembly (5) and then combines together. Step 7: Start the second telescopic pump (704). The second telescopic pump (704) drives the arc-shaped plate (705) to expand outwards, and then drives the inclined plate (706) to rotate. Start the sixth motor (701). The output shaft of the sixth motor (701) drives the rotating shaft (702) to rotate. The rotating shaft (702) drives the second telescopic pump (704). The second telescopic pump (704) drives the arc-shaped plate (705) to rotate. The arc-shaped plate (705) drives the inclined plate (706) to rotate; Step 8: The fused material enters the interior of the cooling box (8) and slides along the protective shell (9). Start the cooler (10). The cooler (10) cools the water source inside the delivery pipe (11); Step 9: The fused three-layer pipe slides into the interior of the ring (101). Start the first motor (105). The output shaft of the first motor (105) drives the first gear (106) to rotate. The first gear (106) drives the first gear ring (104) to rotate. The first gear ring (104) drives the first telescopic pump (107). The first telescopic pump (107) drives the second motor (108). The second motor (108) drives the blade (109). Start the second motor (108). The output shaft of the second motor (108) drives the blade (109) to rotate for cutting.

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