Head for corrugated plastic pipes
The head for corrugated plastic tubes allows cost-effective surface modification by applying coatings directly to the inner and outer surfaces without replacing the wall materials, addressing the high cost issue of material changes in existing pipes.
Patent Information
- Application Number
- DE202025105915
- Authority / Receiving Office
- DE · DE
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2025-12-04
- Estimated Expiration
- 2035-09-30
AI Technical Summary
Existing corrugated plastic pipes require replacement of inner or outer wall materials for specific properties like flame retardancy or smoother surfaces, significantly increasing costs.
A head for corrugated plastic tubes with inner and outer coating spirals, allowing coatings to be applied without replacing the inner or outer wall materials, featuring an inner coating spiral, inner layer spiral, outer layer spiral, and outer coating spiral, with specific feed and removal openings and channels for coating application.
Enables cost-effective modification of pipe surfaces by applying coatings without replacing raw materials, reducing production costs and maintaining material integrity.
Smart Images
Figure 00000000_0000_ABST
Abstract
Description
TECHNICAL AREA
[0001] The present utility model relates to the technical field of processing equipment for the production of corrugated plastic tubes, in particular to a head for corrugated plastic tubes. STATE OF THE ART
[0002] Currently, the double-walled corrugated plastic pipe commonly used on the market is the first corrugated pipe 34 whose structure is Fig. Figure 2 shows that the first corrugated tube 34 consists of a corrugated outer wall and a straight inner wall, which are joined together by a material bond and form a double-walled structure, namely consisting of an outer layer 341 of the first corrugated tube and an inner layer 342 of the first corrugated tube. As shown in connection with Fig. As shown in Figure 1, the head for processing such a corrugated tube has two feed openings for the molten tube blank: one for the outer layer tube blank and one for the inner layer tube blank. The feed opening for the outer layer tube blank is connected to the outer layer spiral 2. The molten tube blank flows spirally through the grooves of the outer layer spiral 2 and finally exits the outer wall discharge opening of the tube in the form of a circular ring. The feed opening for the inner layer tube blank is connected to the inner layer spiral 6. The molten tube blank flows spirally through the grooves of the inner layer spiral 6 and finally exits the inner wall discharge opening of the tube in the form of a circular ring.
[0003] If users have specific requirements, such as flame-retardant pipes that resist combustion, a smoother inner wall for easier fluid transport, or a more aesthetically pleasing and wear-resistant outer wall, the entire material of the inner or outer wall must be replaced. This would significantly increase the raw material costs of the pipe. DISCLOSURE OF THE USE PATTERN
[0004] To overcome the aforementioned disadvantages, the present utility model provides a plastic end cap for corrugated pipes, enabling the inner and outer surfaces of a corrugated pipe to be coated. If a modification of the corrugated pipe's surface material is required, the raw materials for the inner and outer walls do not need to be replaced, thus reducing costs.
[0005] To solve the aforementioned technical problems, the present utility model provides a head for corrugated plastic tubes, wherein the head for corrugated plastic tubes comprises an inner coating spiral, an inner layer spiral, an outer layer spiral, and an outer coating spiral, which are sequentially and rigidly connected to one another from the inside out; if the material feed direction is defined as the front end, an inner sleeve is rigidly connected to the front end of the inner coating spiral, an inner layer core shape is rigidly attached to the front end of the inner sleeve; an outer layer core shape sleeve is rigidly attached to the front end of the outer layer spiral; a middle sleeve is rigidly connected to the front end of the outer layer spiral, an outer layer core shape is rigidly connected to the front end of the middle sleeve, and an inner layer mouth shape is connected to the outer circumferential surface of the outer layer core shape via a thread;A forming sleeve is fixedly connected to the front end of the outer coating spiral, an outer sleeve is fixedly connected to the front end of the forming sleeve, and an outer layer mouth mold is attached to the outer surface of the outer sleeve; the outer layer core forming sleeve is located between the outer sleeve and the middle sleeve; a first gap is formed between the outer coating spiral and the forming sleeve, while a first cavity is formed between the outer layer core forming sleeve and the outer sleeve, and the first gap is connected to the first cavity; the space between the outer layer core mold and the outer layer mouth mold forms an outer wall removal opening, and the outer wall removal opening is connected to the first cavity;A second gap is formed between the inner layer spiral and the inner sleeve, while a second cavity is formed between the inner sleeve and the middle sleeve, and the second gap is connected to the second cavity; the space between the inner layer core shape and the inner layer mouth shape forms an inner wall removal opening, and the inner wall removal opening is connected to the second cavity; an outer coating feed opening is provided on the mold sleeve, and the outer coating feed opening is connected to the grooves of the outer coating spiral; an outer layer feed opening is provided on the outer coating spiral, and the outer layer feed opening is connected to the grooves of the outer layer spiral; an inner layer feed opening is provided on the outer coating spiral, and the inner layer feed opening is connected to the grooves of the inner layer spiral;An internal coating feed opening is provided on the internal coating spiral, and the internal coating feed opening is connected to the grooves of the internal coating spiral.
[0006] Furthermore, an air inlet hole and a vent cavity are open in the outer layer spiral; a third cavity is formed between the middle sleeve and the outer layer core mold sleeve; a groove is provided in the middle sleeve on the outer circumferential surface of the front section of the middle sleeve; the outer layer core mold is provided with an outer layer core mold hole open to the atmosphere; the air inlet hole, the vent cavity, the third cavity, the groove in the middle sleeve and the outer layer core mold hole are interconnected to form a vent channel.
[0007] Furthermore, a front support is firmly connected to the mold sleeve, while a rear support is firmly connected to the outer layer spiral.
[0008] Furthermore, a flange-shaped feed ring A is firmly connected to the outer coating spiral, and the inner layer feed opening is arranged on the feed ring A.
[0009] Furthermore, a flange-shaped feed ring B is firmly connected to the outer coating spiral, and the outer layer feed opening is arranged on the feed ring B.
[0010] Furthermore, a flange-shaped feed ring C is firmly connected to the mold sleeve, and the outer coating feed opening is arranged on the feed ring C.
[0011] Furthermore, a connecting sleeve is firmly connected to the outer circumferential surface of the outer coating spiral, and the connecting sleeve is firmly connected to the mold sleeve.
[0012] Furthermore, an outer sleeve connecting ring is firmly connected to the outer circumferential surface of the outer sleeve, and the outer sleeve connecting ring is firmly connected to the molded sleeve.
[0013] Furthermore, a fourth cavity is formed between the outer layer core shape and the inner layer core shape; the fourth cavity is connected to the inner wall extraction opening and the second cavity.
[0014] Furthermore, a first adjusting screw is provided on the outer layer core shape, and the end of the first adjusting screw presses against the outer circumferential surface of the inner layer core shape; a second adjusting screw is provided on the outer sleeve, and the end of the second adjusting screw presses against the outer circumferential surface of the outer layer core shape sleeve.
[0015] After implementing the above-mentioned technical solution, the advantageous effects of the present utility model are that a head for corrugated plastic tubes comprises an inner coating spiral, an inner layer spiral, an outer layer spiral and an outer coating spiral, which are successively firmly connected to each other from the inside out.An inner sleeve is fixed to the front end of the inner coating spiral, an inner layer core mold is fixed to the front end of the inner sleeve; an outer layer core mold sleeve is fixed to the front end of the outer layer spiral; a middle sleeve is fixed to the front end of the outer layer spiral, an outer layer core mold is fixed to the front end of the middle sleeve, an inner layer mouth mold is threaded to the outer circumferential surface of the outer layer core mold; a mold sleeve is fixed to the front end of the outer coating spiral, an outer sleeve is fixed to the front end of the mold sleeve, and an outer layer mouth mold is attached to the outer surface of the outer sleeve; the outer layer core mold sleeve is located between the outer sleeve and the middle sleeve; each spiral has a corresponding feed opening that communicates with the grooves of the spiral.A first gap is formed between the outer coating spiral and the mold sleeve, while a first cavity is formed between the outer layer core mold sleeve and the outer sleeve, and the first gap is connected to the first cavity; the space between the outer layer core mold and the outer layer mouth mold forms an outer wall removal opening, and the outer wall removal opening is connected to the first cavity; a second gap is formed between the inner layer spiral and the inner sleeve, while a second cavity is formed between the inner sleeve and the middle sleeve, and the second gap is connected to the second cavity; the space between the inner layer core mold and the inner layer mouth mold forms an inner wall removal opening, and the inner wall removal opening is connected to the second cavity.The end cap for corrugated plastic pipes according to the present utility model allows the application of a top coating to both the inner and outer surfaces of the corrugated pipe. If a modification of the corrugated pipe's surface material is required, the raw materials for the inner and outer walls do not need to be replaced, thus reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 is a schematic structural representation of a head for corrugated plastic tubes according to the state of the art; Fig. 2 is a corrugated tube, which is manufactured using the head for corrugated plastic tubes according to the state of the art in Fig. 1 was manufactured; Fig. Figure 3 is a schematic structural representation of the head for corrugated plastic tubes according to the present utility model; Fig. 4 is an enlarged sectional view of AA in Fig. 3; Fig. Figure 5 is an enlarged top view of Fig. 3; Fig. Figure 6 shows a corrugated tube manufactured using the head for corrugated plastic tubes according to the present utility model;
[0016] In the drawings: 1 - Inner coating spiral; 2 - Outer coating spiral; 3 - Molded sleeve heating element; 4 - Outer coating spiral; 5 - First inner heating element; 6 - Inner coating spiral; 7 - Connecting sleeve; 8 - Feed ring C; 81 - Outer coating feed opening; 9 - Molded sleeve; 10 - Air inlet hole; 11 - Connecting ring heating element, 12 - Outer sleeve connecting ring, 13 - Middle sleeve, 14 - Outer layer core mold sleeve, 15 - Outer sleeve, 16 - Inner sleeve, 17 - Outer wall extraction opening, 18 - Inner wall extraction opening, 19 - Outer layer mouth-shaped heating element, 20 - Inner layer mouth-shaped heating element, 21 - Inner layer core mold, 22 - Inner layer mouth mold, 23 - First adjusting screw, 24 - Outer layer core mold, 25 - Outer layer mouth mold, 26 - Second adjusting screw, 27 - Outer sleeve heating element, 28 - Second inner heating element, 29 - Front bracket, 30 - Feed ring A, 301 - Inner layer feed opening, 31 - Feed ring B, 311 - Outer layer feed opening, 32 - Rear bracket33 - Inner coating feed opening, 34 - First corrugated tube, 341 - Outer layer of the first corrugated tube, 342 - Inner layer of the first corrugated tube, 35 - Second corrugated tube, 351 - Outer coating, 352 - Outer layer of the second corrugated tube, 353 - Inner layer of the second corrugated tube, 354 - Inner coating, 36 - First gap, 37 - First cavity, 38 - Second gap, 39 - Second cavity, 40 - Vent cavity, 41 - Third cavity, 42 - Outer layer core mold hole, 43 - Fourth cavity, 44 - Fastening screw. EXECUTION FORMS OF THE USE PATTERN
[0017] The present utility model will be explained in more detail below with reference to the drawings and examples of its embodiment.
[0018] As in connection with Fig. 3, Fig. 4 and Fig. In summary, Figure 5 shows that a head for corrugated plastic tubes comprises an inner coating spiral 1, an inner layer spiral 6, an outer layer spiral 2, and an outer coating spiral 4, which are sequentially and rigidly connected to one another from the inside out. The inner coating spiral 1 is rigidly connected to the inner layer spiral 6 via screws, the inner layer spiral 6 is rigidly connected to the outer layer spiral 2 via screws, and the outer layer spiral 2 is rigidly connected to the outer coating spiral 4 via screws.
[0019] If the material feed direction is defined as the front end, an inner sleeve 16 is fixedly connected to the front end of the inner coating spiral 1, and the inner sleeve 16 is fixedly connected to the inner coating spiral 1 via a thread. An inner layer core shape 21 is fixedly attached to the front end of the inner sleeve 16, and the inner layer core shape 21 is fixedly connected to the inner sleeve 16 via a thread.
[0020] An outer layer core form sleeve 14 is fixedly attached to the front end of the outer layer spiral 2, and the outer layer spiral 2 is fixedly connected to the outer layer core form sleeve 14 via a thread. A middle sleeve 13 is fixedly connected to the front end of the outer layer spiral 2, and the middle sleeve 13 is fixedly connected to the outer layer spiral 2 via screws. An outer layer core form 24 is fixedly connected to the front end of the middle sleeve 13, and the outer layer core form 24 is fixedly connected to the middle sleeve 13 via a thread. An inner layer mouth form 22 is connected to the outer circumferential surface of the outer layer core form 24 via a thread. A connecting sleeve 7 is fixedly connected to the outer circumferential surface of the outer coating spiral 4 via a thread, and the connecting sleeve 7 is fixedly connected to a form sleeve 9 via screws.An outer sleeve connecting ring 12 is firmly connected to the front end of the forming sleeve 9 via screws, the outer sleeve connecting ring 12 is firmly connected to an outer sleeve 15 via a thread, an outer layer mouth mold 25 is attached to the outer surface of the outer sleeve 15; the outer layer core forming sleeve 14 is arranged between the outer sleeve 15 and the middle sleeve 13.
[0021] A first gap 36 is formed between the outer coating spiral 4 and the mold sleeve 9, while a first cavity 37 is formed between the outer layer core mold sleeve 14 and the outer sleeve 15, and the first gap 36 is connected to the first cavity 37. The space between the outer layer core mold 24 and the outer layer mouth mold 25 forms an outer wall removal opening 17, and the outer wall removal opening 17 is connected to the first cavity 37.
[0022] A second gap 38 is formed between the inner layer spiral 6 and the inner sleeve 16, while a second cavity 39 is formed between the inner sleeve 16 and the middle sleeve 13, and the second gap 38 is connected to the second cavity 39. The space between the inner layer core shape 21 and the inner layer mouth shape 22 forms an inner wall extraction opening 18, and the inner wall extraction opening 18 is connected to the second cavity 39. A fourth cavity 43 is formed between the outer layer core shape 24 and the inner layer core shape 21; the fourth cavity 43 is connected to the inner wall extraction opening and the second cavity 39.
[0023] In the outer layer spiral 2, an air inlet hole 10 and a vent cavity 40 are open. The air inlet hole 10 opens radially along the outer layer spiral 2; the vent cavity 40 opens axially along the outer layer spiral 2. A third cavity 41 is formed between the middle sleeve 13 and the outer layer core mold sleeve 14. A groove (not shown) is provided in the middle sleeve 13 on its outer circumferential surface at the front of the middle sleeve 13. The outer layer core mold 24 is provided with an outer layer core mold hole 42 open to the atmosphere. The air inlet hole 10, the vent cavity 40, the third cavity 41, the groove in the middle sleeve, and the outer layer core mold hole 42 are interconnected to form a vent channel.
[0024] A front bracket 29 is firmly connected to the mold sleeve 9 via screws, while a rear bracket 32 is firmly connected to the outer layer spiral 2 via screws.
[0025] A flanged feed ring A30 is fixedly connected to the outer coating spiral 4. An inner coating feed opening 301 is provided on the feed ring A30, and the inner coating feed opening 301 communicates with the grooves of the inner coating spiral 6. A flanged feed ring B31 is fixedly connected to the outer coating spiral 4. An outer coating feed opening 311 is provided on the feed ring B31, and the outer coating feed opening 311 communicates with the grooves of the outer coating spiral 2. A flanged feed ring C8 is fixedly connected to the forming sleeve 9. An outer coating feed opening 81 is provided on the feed ring C8, and the outer coating feed opening 81 communicates with the grooves of the outer coating spiral 4. An internal coating feed opening 33 is provided on the internal coating spiral 1, and the internal coating feed opening 33 is connected to the grooves of the internal coating spiral 1.
[0026] A mold sleeve heating element 3 is attached to the outer circumferential surface of the outer coating spiral 4, a connecting ring heating element 11 is attached to the outer circumferential surface of the outer sleeve connecting ring 12, an outer sleeve heating element 27 is attached to the outer circumferential surface of the outer sleeve 15, an outer layer mouth mold heating element 19 is attached to the outer circumferential surface of the outer layer mouth mold 25, an inner layer mouth mold heating element 20 is attached to the outer circumferential surface of the inner layer mouth mold 22, a first inner heating element 5 is attached to the inner surface of the inner coating spiral 1, and a second inner heating element 28 is attached to the inner surface of the inner sleeve 16 and the inner surface of the inner layer core mold 21.
[0027] A first adjusting screw 23 is provided on the outer layer core mold 24, and the end of the first adjusting screw 23 presses against the outer circumferential surface of the inner layer core mold 21. The circumferential uniformity of the wall thickness of the inner layer blank can be regulated with the first adjusting screw 23. The outer layer core mold 24 is connected to the inner layer mouth mold 22 via a thread. The thickness of the inner layer blank can be adjusted by turning the inner layer mouth mold 22.
[0028] A second adjusting screw 26 is provided on the outer sleeve 15, and the end of the second adjusting screw 26 presses against the outer circumferential surface of the outer layer core mold sleeve 14. The circumferential uniformity of the wall thickness of the outer layer blank can be regulated with the second adjusting screw 26. The thickness of the outer layer blank can be adjusted by rotating the outer layer mouth mold 25. After the adjustment is complete, the outer layer mouth mold 25 is secured with a fastening screw 44 to prevent rotation of the outer layer mouth mold 25.
[0029] The head for corrugated plastic pipes according to the present utility model can also be put into operation if no material is added to either the inner or outer coatings, or if material is added to only one of the inner or outer coatings. If no material is added to either the inner or outer coatings, the manufactured corrugated pipe lacks a top layer. If material is added to the inner coating but not to the outer coating, the manufactured corrugated pipe has a top layer only on its inner surface. If no material is added to the inner coating, but material is added to the outer coating, then the manufactured corrugated pipe has a top layer only on its outer surface.
[0030] The head for corrugated plastic pipes according to the present utility model enables the production of single-walled corrugated pipes with a top coating on the outer wall, provided that no material is added to the inner wall.
[0031] The following describes in detail the process for processing the second corrugated tube 35 with double-walled structure using the head for corrugated plastic tubes according to the present utility model:
[0032] As in connection with Fig. 3 and Fig.As summarized in Figure 6, during pipe manufacturing, the outer wall blank passes successively through the outer layer feed opening 311 of the feed ring B31, the circular opening of the outer coating spiral 4, and enters the grooves of the outer layer spiral 2. After homogenization in the spiral grooves, it enters the annular first cavity 37 between the outer sleeve 15 and the outer layer core mold sleeve 14. Simultaneously, the outer wall coating blank passes successively through the outer coating feed opening 81 of the feed ring C8, the circular opening of the mold sleeve 9, and enters the grooves of the outer coating spiral 4. After homogenization in the spiral grooves, it flows out through the first gap 36 formed between the outer coating spiral 4 and the mold sleeve 9 and completely envelops the outer surface of the outer layer blank.Finally, it flows through the outer wall extraction opening 17, which is formed by the space between the outer layer mouth shape 25 and the outer layer core shape 24, and forms an outer layer blank with a cover layer.
[0033] The inner wall blank passes successively through the inner layer feed opening 301 of the feed ring A30, the circular opening of the outer coating spiral 4, and the circular opening of the outer layer spiral 2 before entering the grooves of the inner layer spiral 6. After homogenization in the spiral grooves, it enters the annular, second cavity 39 between the middle sleeve 13 and the inner sleeve 16. Simultaneously, the inner wall coating blank enters the grooves of the inner coating spiral 1 via the inner coating feed opening 33. After homogenization in the spiral grooves, it flows out through the gap formed between the inner coating spiral 1 and the inner layer spiral 6 and completely envelops the inner surface of the inner layer blank.Finally, it flows through the inner wall extraction opening 18, which is formed by the space between the inner layer core shape 21 and the inner layer mouth shape 22, and forms an inner layer blank with a cover layer on the inner surface.
[0034] Since the inner wall of the corrugated tube rests against the outer diameter of the diameter die (not shown) and the outer wall of the corrugated tube rests against the inner cavity of the module (not shown), the extruded blank, based on the extrusion between the diameter die and the module, becomes the second corrugated tube 35 with a double-walled structure. From the outside in, the second corrugated tube 35 consists of an outer coating 351, an outer layer 352, an inner layer 353, and an inner coating 354.
[0035] The technical features used in this description with standard designations (e.g., first internal heating element, second internal heating element, first adjusting screw, second adjusting screw, first corrugated tube, an outer layer of the first corrugated tube, inner layer of the first corrugated tube, second corrugated tube, an outer layer of the second corrugated tube, an inner layer of the second corrugated tube, first gap, first cavity, second gap, second cavity, third cavity, fourth cavity, etc.) serve exclusively to distinguish between technical features and do not represent spatial relationships, assembly sequence, operating sequence, etc., of the technical features.
[0036] In the description of this specification, it is understood that terms such as "inner coating spiral", "outer layer spiral", "outer coating spiral", "first inner heating element", "inner layer spiral", "outer coating feed opening", "outer sleeve connecting ring", "middle sleeve", "outer layer core mold sleeve", "outer sleeve", "inner sleeve", "outer wall extraction opening", "inner wall extraction opening", "outer layer mouth mold heating element", "inner layer mouth mold heating element", "inner layer core mold", "inner layer mouth mold", "outer layer core mold", "outer layer mouth mold", "outer sleeve heating element", "front bracket", "inner layer feed opening", "outer layer feed opening", "rear bracket", "inner coating feed opening", "outer layer of first corrugated tube", "inner layer of first corrugated tube", "outer coating", "outer layer of second corrugated tube", "inner layer of second corrugated tube", "inner coating", "Outer layer core mold hole", "front end",The terms "from inside to outside," "from outside to inside," "inner surface," "outer surface," "axial," "radial," and other descriptions of orientations or positional relationships are based on the orientations or positional relationships depicted in the drawings. They serve solely to facilitate and simplify the description of this utility model and are not intended to indicate or imply that the devices or elements in question must have a specific orientation, be constructed in a specific orientation, or be operated in a specific orientation. Therefore, they should not be interpreted as limitations of this utility model.
[0037] This utility model is not limited to the specific embodiments described above. Various modifications made by people skilled in the art based on the above concept without any creative work fall within the scope of protection of this utility model.
Claims
[1] Head for corrugated plastic pipes, characterized by , that the head for corrugated plastic tubes comprises an inner coating spiral, an inner layer spiral, an outer layer spiral and an outer coating spiral, which are successively tightly connected to each other from the inside out; if the material feed direction is defined as the front end, an inner sleeve is fixedly connected to the front end of the inner coating spiral, an inner layer core shape is fixedly attached to the front end of the inner sleeve; an outer layer core shape sleeve is fixedly attached to the front end of the outer layer spiral; a middle sleeve is fixedly connected to the front end of the outer layer spiral, an outer layer core shape is fixedly connected to the front end of the middle sleeve, an inner layer mouth shape is connected to the outer circumferential surface of the outer layer core shape via a thread; a shape sleeve is fixedly connected to the front end of the outer coating spiral, an outer sleeve is fixedly connected to the front end of the shape sleeve, and an outer layer mouth shape is attached to the outer surface of the outer sleeve; the outer layer core shape sleeve is located between the outer sleeve and the middle sleeve; a first gap is formed between the outer coating spiral and the mold sleeve, while a first cavity is formed between the outer layer core mold sleeve and the outer sleeve, and the first gap is connected to the first cavity; the space between the outer layer core mold and the outer layer mouth mold forms an outer wall removal opening, and the outer wall removal opening is connected to the first cavity; a second gap is formed between the inner layer spiral and the inner sleeve, while a second cavity is formed between the inner sleeve and the middle sleeve, and the second gap is connected to the second cavity; the space between the inner layer core shape and the inner layer mouth shape forms an inner wall extraction opening, and the inner wall extraction opening is connected to the second cavity; The mold sleeve has an external coating feed opening, and the external coating feed opening is connected to the grooves of the external coating spiral; an outer layer feed opening is provided on the outer coating spiral, and the outer layer feed opening is connected to the grooves of the outer layer spiral; an inner layer feed opening is provided on the outer coating spiral, and the inner layer feed opening is connected to the grooves of the inner layer spiral; An internal coating feed opening is provided on the internal coating spiral, and the internal coating feed opening is connected to the grooves of the internal coating spiral. [2] Head for corrugated plastic tubes according to claim 1, characterized by, that an air inlet hole and a vent cavity are open in the outer layer spiral; a third cavity is formed between the middle sleeve and the outer layer core mold sleeve; a groove is provided in the middle sleeve on the outer circumferential surface of the front section of the middle sleeve; the outer layer core mold is provided with an outer layer core mold hole open to the atmosphere; the air inlet hole, the vent cavity, the third cavity, the groove in the middle sleeve and the outer layer core mold hole are interconnected to form a vent channel. [3] Head for corrugated plastic tubes according to claim 1, characterized by , that a front support is firmly connected to the mold sleeve, while a rear support is firmly connected to the outer layer spiral. [4] Head for corrugated plastic tubes according to claim 1, characterized by, that a flange-shaped feed ring A is firmly connected to the outer coating spiral, and the inner layer feed opening is arranged on the feed ring A. [5] Head for corrugated plastic tubes according to claim 1, characterized by , that a flange-shaped feed ring B is firmly connected to the outer coating spiral, and the outer layer feed opening is arranged on the feed ring B. [6] Head for corrugated plastic tubes according to claim 1, characterized by , that a flange-shaped feed ring C is firmly connected to the mold sleeve, and the outer coating feed opening is arranged on the feed ring C. [7] Head for corrugated plastic tubes according to claim 1, characterized by , that a connecting sleeve is firmly connected to the outer circumferential surface of the outer coating spiral, and the connecting sleeve is firmly connected to the mold sleeve. [8] Head for corrugated plastic tubes according to claim 1, characterized by, that an outer sleeve connecting ring is firmly connected to the outer circumferential surface of the outer sleeve, and the outer sleeve connecting ring is firmly connected to the molded sleeve. [9] Head for corrugated plastic tubes according to claim 1, characterized by , that a fourth cavity is formed between the outer layer core shape and the inner layer core shape, the fourth cavity being connected to the inner wall extraction opening and the second cavity. [10] Head for corrugated plastic tubes according to claim 1, characterized by , that a first adjusting screw is provided on the outer layer core shape, and the end of the first adjusting screw presses against the outer circumferential surface of the inner layer core shape; a second adjusting screw is provided on the outer sleeve, and the end of the second adjusting screw presses against the outer circumferential surface of the outer layer core shape sleeve.