Integrated production apparatus, method and use of a clair tube and a hollow wall tube

Abstract

The application provides an integrated production device, method and application of a clara pipe and a hollow wall pipe, and relates to the technical field of plastic pipe production equipment. Different shapes of extrusion dies are arranged, so that two different types of pipes can be made in one machine. A first pressure roller is arranged at intervals with a winding die, so that the wall thickness of the hollow wall pipe can be controlled according to the intervals. A second pressure roller is in contact with the winding die, and can be used to support the winding pipe prepared in the winding die. When the hollow wall pipe is prepared, the overflow of molten glue is prevented from affecting the spacing between the two winding pipes in the hollow wall pipe. The device provided by the application realizes the preparation of two types of pipes in one machine, greatly saving the equipment investment cost. The hollow wall pipe adopts the same production method as the clara pipe, and can be integrally formed with a socket, a spigot and a pipe body, avoiding problems such as socket cracking and falling caused by separate injection molding of the socket.

Description

Technical Field

[0001] This invention relates to the field of plastic pipe production equipment technology, and more specifically, to an integrated production apparatus, method and application for corrugated pipes and hollow wall pipes. Background Technology

[0002] Municipal spiral wound pipes mainly come in two types: kraft pipes and hollow wall pipes, requiring a wide variety of production equipment. For example, kraft pipe production equipment mainly includes: a PP base pipe production line, a coiling machine, an extruder, a winding machine, steel molds, a cooling machine, and a trimming machine. Hollow wall pipe production equipment mainly includes: a square tube production line, a melt extruder, winding molds, and a socket injection molding machine. If a manufacturer wants to produce both hollow wall pipes and kraft pipes simultaneously, it needs to configure two sets of equipment for independent production. This results in a large footprint, high initial investment, and high maintenance costs.

[0003] Furthermore, while the body of the hollow-wall spiral wound pipe is produced continuously, its socket still requires injection molding. Because injection molding is a two-stage process, defects can occur at the connection between the socket and the pipe body. Prolonged storage can easily lead to cracks requiring repair or even rework.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide an integrated production apparatus, method and application for kraft pipes and hollow wall pipes, which can save equipment investment costs and increase the types of pipes that a factory can produce.

[0006] The embodiments of the present invention are implemented as follows: In a first aspect, the present invention provides an integrated production apparatus for corrugated tubes and hollow wall tubes, comprising a wound tube extrusion unit, a melt extrusion unit, and a winding forming unit.

[0007] The winding forming unit includes a support, a winding die, a first pressure roller, and a second pressure roller. The winding die is mounted on the support. The winding tube extrusion unit includes a first extrusion outlet for extruding the winding tube, and the melt extrusion unit includes a second extrusion outlet for extruding the melt. The first extrusion outlet and the second extrusion outlet are both spaced apart from the winding die. The first pressure roller and the second pressure roller are both connected to the melt extrusion unit. The first pressure roller is spaced apart from the winding die, and the second pressure roller contacts the winding die and is used to abut against the winding tube extruded from the first extrusion outlet.

[0008] Understandably, in order to ensure that uniformly structured Krah tubes or hollow-walled tubes can be obtained on the winding die during the production process of Krah tubes and hollow-walled tubes, the winding tube extrusion unit, the melt extrusion unit, and the winding molding unit are all movable. Since the winding die is a long, cylindrical die used to form the inner wall of the tube, the production of Krah tubes or hollow-walled tubes is completed as the melt and the wound tube move along the winding die.

[0009] Therefore, the movement of the spiral wound tube extrusion unit moves the spiral wound die, and the movement of the melt extrusion unit and the spiral wound forming unit moves the melt or the spiral wound tube. Generally, when the spiral wound tube extrusion unit moves, the melt extrusion unit and the spiral wound forming unit remain stationary, and vice versa, to facilitate tube formation. However, the spiral wound tube extrusion unit, the melt extrusion unit, and the spiral wound forming unit can also move simultaneously. As long as the speeds of the three units are controlled, it is also possible to fabricate corrugated tubes or hollow-walled tubes on the surface of the spiral wound die.

[0010] In an optional implementation, the spiral wound tube extrusion unit can be driven by a track to move the entire structure, and the melt extrusion unit and the spiral wound molding unit can also be driven by a track, slider or other structure.

[0011] It is understood that both the first and second pressure rollers are connected to the melt extrusion unit, and therefore, the movement of the first and second pressure rollers is consistent with that of the melt extrusion unit.

[0012] The spiral wound tube extrusion unit includes a circular extrusion die and a square extrusion die, with a first extrusion outlet connected to either the circular or square extrusion die. The spiral wound tube extrusion unit can extrude spiral wound tubes. When the spiral wound tube extrusion unit uses a circular extrusion die, the extruded spiral wound tube is a round tube, which can be used to prepare corrugated tubes; when the spiral wound tube extrusion unit uses a square extrusion die, the extruded spiral wound tube is a square tube, which can be used to prepare hollow wall tubes.

[0013] The melt extrusion unit includes a flat extrusion die and a square-round extrusion die, and the second extrusion outlet is connected to either the flat extrusion die or the square-round extrusion die. The melt extrusion unit can extrude melt. When the melt extrusion unit uses a flat extrusion die, the extruded melt is a flat strip, which can be used to prepare kraft tubes. When the melt extrusion unit uses a square-round extrusion die, the extruded melt is a strip structure, which can be used to prepare hollow wall tubes.

[0014] When the first extrusion outlet is connected to a circular extrusion die, and the second extrusion outlet is connected to a flat extrusion die, a corrugated tube can be produced. When the first extrusion outlet is connected to a square extrusion die, and the second extrusion outlet is connected to a square-round extrusion die, a hollow-walled tube can be produced.

[0015] Krah tubes are a type of wound-walled pipe. These pipes typically consist of a single-layer ordinary pipe on the inner wall and a wound circular pipe on the outer wall. Their longitudinal section comprises two single-layer inner pipes and multiple small circular pipes evenly arranged on the outer wall of the inner pipe. Hollow-walled pipes have smooth circular pipes on both the inner and outer walls, with a hollow structure within the pipe wall between the inner and outer walls. Because Krah tubes are made by winding an outer circular pipe around the inner pipe layer, while hollow-walled pipes are made by filling the gaps between the wound pipes with molten adhesive, their production processes are completely different. Currently, producing both hollow-walled pipes and Krah tubes simultaneously requires separate equipment, but each equipment set involves numerous devices, increasing equipment costs. This invention uses the Krah tube production model to produce hollow-walled pipes, enabling a single machine to produce both types of pipes, thus reducing equipment costs. Furthermore, to ensure the hollow-walled pipe structure meets requirements, a second pressure roller is designed to control the position of the wound pipes, preventing molten adhesive overflow and affecting the spacing between adjacent wound pipes, thereby ensuring the quality of the hollow-walled pipe.

[0016] In an optional embodiment, the winding forming unit further includes a hollow wall tube flaring mold, which includes a flaring section and a connecting section. One end of the connecting section is connected to the flaring section, and the other end is installed at the end of the winding mold. The diameter of the flaring section is larger than the diameter of the winding mold.

[0017] Since the device of the present invention is based on the production equipment of Krah tubes and the flared end of the hollow wall tube has a large diameter, a special mold is required to prepare the hollow wall tube. The connecting section of the flared mold of the hollow wall tube is used to connect the winding mold and the flared section. Therefore, in some embodiments, the connecting section is an enlarged diameter structure, and the diameter increases sequentially along the direction from the winding mold to the flared section.

[0018] In an optional embodiment, connectors are provided at the same positions on both the flared section and the connecting section. These connectors include any one of the following: snap-fit ​​connectors, half-fit connectors, or tenon-and-mortise connectors. Since the winding mold used in the production of kraft tubes has a shrinking capability, this shrinking structure facilitates the demolding of the kraft tubes and also facilitates the installation of the connectors of this invention. When the winding mold shrinks, the hollow wall tube flaring mold is simply fitted onto the end of the winding mold using snap-fit ​​connectors or other connector structures. The structure of the winding mold can be a conventional existing structure.

[0019] In an optional embodiment, the second pressure roller is used to abut against the spiral tube extruded from the first extrusion outlet, and the direction from the first extrusion outlet to the second extrusion outlet is the same as the direction from the second pressure roller to the first pressure roller.

[0020] Since both the first and second pressure rollers abut against the winding tube, and both the first and second pressure rollers are connected to the melt extrusion unit, it is easier to control the position of the melt extrusion unit and the winding tube extrusion unit, thus ensuring the winding process of the melt and the winding tube.

[0021] In an optional embodiment, the height of the gap between the first pressure roller and the winding die is equal to the outer diameter of the winding tube extruded by the winding tube extrusion unit.

[0022] In optional embodiments, the extrusion orifice shape of the square extrusion die includes any one of a rectangle, square, parallelogram, or trapezoid. In other embodiments, the shape of the square extrusion die can be designed according to the structure of the hollow wall tube.

[0023] In an optional embodiment, the extrusion orifice shape of the flat extrusion die includes a rectangle or a parallelogram, and the aspect ratio of the extrusion orifice of the flat extrusion die is 280~320:1.

[0024] In an optional embodiment, the extrusion orifice shape of the square and round extrusion die includes any one of a rectangle, a square, a parallelogram, a circle, or an ellipse.

[0025] When the extrusion orifice of the square and round extrusion die is any one of a rectangle, square, or parallelogram, the length-to-width ratio of the extrusion orifice is 1 to 4:1; when the extrusion orifice of the square and round extrusion die is circular or elliptical, the length ratio of the major axis to the minor axis of the extrusion orifice is 1 to 4:1.

[0026] Secondly, the present invention provides an integrated production method for kraft tubes and hollow wall tubes, applicable to an integrated production apparatus for kraft tubes and hollow wall tubes as described in any of the foregoing embodiments, comprising, during the production of kraft tubes, extruding molten adhesive through a flat extrusion die, extruding a winding tube through a circular extrusion die, the molten adhesive being wound around the surface of a winding die, and the winding tube being wound intermittently around the surface of the molten adhesive.

[0027] In the production of hollow wall tubes, a square or round extrusion die extrudes molten adhesive, while a square extrusion die extrudes a winding tube. The winding tube is wound at intervals around the surface of the winding die. A second pressure roller holds the winding tube against the winding tube, and a first pressure roller fills the spaces between the winding tubes with molten adhesive from the surface of the winding die.

[0028] Understandably, since both Krah tubes and hollow wall tubes are pipes made of two different materials, in order to ensure the structural stability of Krah tubes and hollow wall tubes, the molten adhesive and the winding tube are wound simultaneously on the winding mold to ensure that the prepared Krah tubes and hollow wall tubes have a stable structure.

[0029] In an optional embodiment, when producing hollow wall tubes, a hollow wall tube flaring mold is first installed on a winding mold. Then, a square-round extrusion die extrudes molten adhesive, and a square extrusion die extrudes a winding tube. The molten adhesive is wound on the surface of the hollow wall tube flaring mold to form a flared end. After the flared end is wound, the winding tube is wound intermittently on the surface of the winding mold. At the same time, the molten adhesive fills the space between two adjacent winding tubes. A second pressure roller holds the winding tube, and a first pressure roller fills the space between the winding tubes with the molten adhesive on the surface of the winding mold.

[0030] Thirdly, the present invention provides an integrated production apparatus for corrugated tubes and hollow wall tubes as described in any of the foregoing embodiments, applied in the field of plastic pipe production.

[0031] The beneficial effects of the embodiments of the present invention are: This invention provides an integrated production apparatus, method, and application for Krah tubes and hollow-walled tubes. By setting extrusion dies of different shapes, two different types of pipes can be produced in one machine. Simultaneously, a first pressure roller is spaced apart from the winding die, allowing control of the hollow-walled tube's wall thickness based on this interval. A second pressure roller contacts the winding die, supporting the wound tubes produced within it and preventing molten adhesive overflow that could affect the spacing between the two wound tubes in the hollow-walled tube production process. The apparatus provided by this invention enables the production of two types of pipes in one machine, significantly reducing equipment investment costs. Furthermore, the hollow-walled tubes utilize the same production method as Krah tubes, allowing for the integral molding of the socket, spigot, and tube body, avoiding problems such as socket cracking and detachment caused by separate socket injection molding. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 A front view of an integrated production apparatus for corrugated tubes and hollow-walled tubes provided in an embodiment of the present invention; Figure 2 A top view of an integrated production apparatus for corrugated tubes and hollow-walled tubes provided in an embodiment of the present invention; Figure 3 The three views of the circular extrusion die provided in the embodiment of the present invention are: front view, side view, and top view. Figure 4 The three views of the square extrusion die provided in the embodiment of the present invention are: front view, side view, and top view. Figure 5This is a bottom view of the flat extrusion die provided in an embodiment of the present invention; Figure 6 This is a bottom view of a square and round extrusion die provided in an embodiment of the present invention; Figure 7 This is a side sectional view of the hollow wall tube flaring mold provided in an embodiment of the present invention; Figure 8 This is a top view of the hollow wall tube flaring mold provided in an embodiment of the present invention.

[0034] Icons: 100 - Integrated production unit for corrugated tubing and hollow wall tubing; 110 - Spiral wound tube extrusion unit; 111 - First extrusion outlet; 112 - Circular extrusion die; 113 - Square extrusion die; 120 - Melt extrusion unit; 121 - Second extrusion outlet; 122 - Flat extrusion die; 123 - Square and round extrusion die; 130 - Spiral wound forming unit; 131 - Support; 132 - Spiral wound die; 133 - First pressure roller; 134 - Second pressure roller; 135 - Hollow wall tubing flaring die; 1351 - Flaring section; 1352 - Connecting section; 1353 - Connector; 200 - Spiral wound tube; 300 - Melt adhesive. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0040] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] First Embodiment Please refer to Figure 1 and Figure 2 This embodiment provides an integrated production apparatus 100 for corrugated tubes and hollow wall tubes, which includes a wound tube extrusion unit 110, a melt extrusion unit 120 and a winding forming unit 130.

[0042] The winding forming unit 130 includes a support 131, a winding die 132, a first pressure roller 133, and a second pressure roller 134. The winding die 132 is mounted on the support 131. The winding tube extrusion unit 110 includes a first extrusion outlet 111 for extruding the winding tube 200. The melt extrusion unit 120 includes a second extrusion outlet 121 for extruding the melt 300. The first extrusion outlet 111 and the second extrusion outlet 121 are both spaced apart from the winding die 132. The first pressure roller 133 and the second pressure roller 134 are both connected to the melt extrusion unit 120. The first pressure roller 133 is spaced apart from the winding die 132, and the second pressure roller 134 contacts the winding die 132 and is used to abut against the winding tube 200 extruded from the first extrusion outlet 111.

[0043] Understandably, in order to ensure that uniformly structured Krah tubes or hollow wall tubes can be obtained on the winding die 132 during the production process of Krah tubes and hollow wall tubes, the winding tube extrusion unit 110, the melt extrusion unit 120, and the winding forming unit 130 are all movable. Since the winding die 132 is a long, cylindrical die used to form the inner wall surface of the tube, the production of Krah tubes or hollow wall tubes is completed as the melt 300 and the winding tube 200 move along the winding die 132.

[0044] For example, when the winding die 132 is stationary and the winding tube extrusion unit 110 and the melt extrusion unit 120 move to prepare a corrugated tube or a hollow wall tube, firstly, both the winding tube extrusion unit 110 and the melt extrusion unit 120 are located at the socket end of the winding die 132 and move from the socket end to the spigot end of the winding die 132. During the movement, the winding tube extrusion unit 110 extrudes the winding tube 200 and the melt extrusion unit 120 extrudes the melt 300 to form a corrugated tube or a hollow wall tube on the surface of the winding die 132.

[0045] When the winding die 132 moves while the winding tube extrusion unit 110 and the melt extrusion unit 120 remain stationary to prepare a corrugated tube or a hollow wall tube, firstly, both the winding tube extrusion unit 110 and the melt extrusion unit 120 are located at the socket end of the winding die 132. During the process of the winding tube extrusion unit 110 extruding the winding tube 200 and the melt extrusion unit 120 extruding the melt 300, the winding die 132 moves along the direction from the socket end to the spigot end, so that during the movement of the winding die 132, the melt 300 and the winding tube 200 form a corrugated tube or a hollow wall tube on the surface of the winding die 132.

[0046] As the melt extrusion unit 120 and the winding forming unit 130 move, the melt 300 and the winding tube 200 move respectively. Therefore, generally, when the winding tube extrusion unit 110 moves, the melt extrusion unit 120 and the winding forming unit 130 remain stationary, and vice versa, to facilitate the formation of the tube. However, the winding tube extrusion unit 110, the melt extrusion unit 120, and the winding forming unit 130 can also move simultaneously. As long as the speed of the three units is controlled, it is also possible to prepare a corrugated tube or a hollow-walled tube on the surface of the winding mold 132.

[0047] In this embodiment, the winding tube extrusion unit 110, the melt extrusion unit 120, and the winding forming unit 130 all adopt track movement.

[0048] It is understood that the first pressure roller 133 and the second pressure roller 134 are both connected to the melt extrusion unit 120. Therefore, the movement mode of the first pressure roller 133 and the second pressure roller 134 is the same as that of the melt extrusion unit 120.

[0049] In this embodiment, both the first pressure roller 133 and the second pressure roller 134 are cylindrical structures composed of multiple closely contacting annular rings. The cylindrical structure of the first pressure roller 133 is placed horizontally along its axis, while the cylindrical structure of the second pressure roller 134 is placed vertically along its axis. The axes of the cylindrical structures of the first pressure roller 133 and the second pressure roller 134 are perpendicular to each other.

[0050] Please refer to Figure 3 and Figure 4 The spiral wound tube extrusion unit 110 includes a circular extrusion die 112 and a square extrusion die 113, and a first extrusion outlet 111 is connected to either the circular extrusion die 112 or the square extrusion die 113. The spiral wound tube extrusion unit 110 can extrude spiral wound tubes 200. When the spiral wound tube extrusion unit 110 uses the circular extrusion die 112, the extruded spiral wound tube 200 is a round tube, which can be used to prepare carat tubes; when the spiral wound tube extrusion unit 110 uses the square extrusion die 113, the extruded spiral wound tube 200 is a square tube, which can be used to prepare hollow wall tubes.

[0051] Please refer to Figure 5 and Figure 6 The melt extrusion unit 120 includes a flat extrusion die 122 and a square-round extrusion die 123. The second extrusion outlet 121 is connected to either the flat extrusion die 122 or the square-round extrusion die 123. The melt extrusion unit 120 can extrude melt 300. When the melt extrusion unit 120 uses the flat extrusion die 122, the extruded melt 300 is a flat strip material, which can be used to prepare kraft tubes. When the melt extrusion unit 120 uses the square-round extrusion die 123, the extruded melt 300 is a strip structure, which can be used to prepare hollow wall tubes.

[0052] When the first extrusion outlet 111 is connected to the circular extrusion die 112, and the second extrusion outlet 121 is connected to the flat extrusion die 122, a corrugated tube can be produced. When the first extrusion outlet 111 is connected to the square extrusion die 113, and the second extrusion outlet 121 is connected to the square-round extrusion die 123, a hollow-walled tube can be produced.

[0053] Please refer to Figure 7 and Figure 8In this embodiment, the winding forming unit 130 further includes a hollow wall tube flaring mold 135. The hollow wall tube flaring mold 135 includes a flaring section 1351 and a connecting section 1352. One end of the connecting section 1352 is connected to the flaring section 1351, and the other end is installed at the end of the winding mold 132. The diameter of the flaring section 1351 is larger than the diameter of the winding mold 132.

[0054] Since the device of the present invention is based on the production equipment of Krah tubes and the flared end of the hollow wall tube has a large diameter, a special mold is required to prepare the hollow wall tube. The connecting section 1352 of the hollow wall tube flaring mold 135 is used to connect the winding mold 132 and the flared section 1351. Therefore, in this embodiment, the connecting section 1352 is an enlarged diameter structure, and the diameter increases sequentially along the direction from the winding mold 132 to the flared section 1351.

[0055] In this embodiment, connectors 1353 are provided at the same positions on both the flared section 1351 and the connecting section 1352. The connectors 1353 are snap-fit ​​connectors. Since the winding mold 132 used in the production of kraft tubes has a shrinking capability, this shrinking structure facilitates the demolding of the kraft tubes and also facilitates the installation of the connectors 1353. When the winding mold 132 shrinks, the hollow wall tube flared mold 135 is simply fitted onto the end of the winding mold 132 using the snap-fit ​​connectors 1353. The structure of the winding mold 132 can be a conventional existing structure.

[0056] In this embodiment, the second pressure roller 134 is used to abut against the spiral tube 200 extruded from the first extrusion outlet 111, and the direction from the first extrusion outlet 111 to the second extrusion outlet 121 is the same as the direction from the second pressure roller 134 to the first pressure roller 133.

[0057] Since both the first pressure roller 133 and the second pressure roller 134 abut against the winding tube 200, and both the first pressure roller 133 and the second pressure roller 134 are connected to the melt extrusion unit 120, it is easier to control the position of the melt extrusion unit 120 and the winding tube extrusion unit 110, thus ensuring the winding process of the melt 300 and the winding tube 200.

[0058] In this embodiment, the distance between the first pressure roller 133 and the winding die 132 is the outer diameter of the winding tube 200 extruded by the winding tube extrusion unit 110.

[0059] In this embodiment, the extrusion orifice of the square extrusion die 113 is square in shape.

[0060] In this embodiment, the extrusion orifice of the flat extrusion die 122 is a parallelogram, and the aspect ratio of the extrusion orifice of the flat extrusion die 122 is 300:1.

[0061] In this embodiment, the extrusion orifice of the square-round extrusion die 123 is elliptical in shape, and the ratio of the length of the major axis to the minor axis of the extrusion orifice of the square-round extrusion die 123 is 3:1. Here, the aspect ratio is the ratio of the length of the major axis to the minor axis of the ellipse.

[0062] This embodiment provides an integrated production device 100 for corrugated tubes and hollow-walled tubes, the working principle of which is as follows: During the production of kraft tubes, the second extrusion outlet 121 of the melt extrusion unit 120 is equipped with a flat extrusion die 122 for extruding melt 300, and the first extrusion outlet 111 of the winding tube extrusion unit 110 is equipped with a circular extrusion die 112 for extruding winding tube 200. The melt 300 is wound around the surface of the winding die 132, and the winding tube 200 is wound around the surface of the melt 300 synchronously and at intervals.

[0063] In the production of hollow wall tubes, a hollow wall tube flaring die 135 is first installed on the winding die 132. The second extrusion outlet 121 of the melt extrusion unit 120 is equipped with a square-round extrusion die 123 for extruding melt 300. The first extrusion outlet 111 of the winding tube extrusion unit 110 is equipped with a square extrusion die 113 for extruding winding tube 200. The melt 300 is wound on the surface of the hollow wall tube flaring die 135 to form a flared end. After the flared end is wound, the winding tube 200 is wound intermittently on the surface of the winding die 132. At the same time, the melt 300 fills the space between two adjacent winding tubes 200. The second pressure roller 134 holds the winding tube 200 against the winding tube, and the first pressure roller 133 fills the space between the winding tubes 200 with the melt 300 on the surface of the winding die 132.

[0064] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An integrated production apparatus for corrugated tubes and hollow-walled tubes, characterized in that, Spiral wound tube extrusion unit, melt extrusion unit, and spiral wound forming unit; The winding forming unit includes a support, a winding die, a first pressure roller, and a second pressure roller. The winding die is mounted on the support. The winding tube extrusion unit includes a first extrusion outlet for extruding the winding tube, and the melt extrusion unit includes a second extrusion outlet for extruding molten adhesive. Both the first and second extrusion outlets are spaced apart from the winding die. Both the first and second pressure rollers are connected to the melt extrusion unit, and the first pressure roller is spaced apart from the winding die. The distance between the first pressure roller and the winding die is equal to the outer diameter of the winding tube extruded by the winding tube extrusion unit. The second pressure roller contacts the winding die and is used to abut against the winding tube extruded from the first extrusion outlet. The direction from the first extrusion outlet to the second extrusion outlet is the same as the direction from the second pressure roller to the first pressure roller. Both the first pressure roller and the second pressure roller are cylindrical structures composed of multiple tightly contacting annular rings, with the cylindrical structure of the first pressure roller placed horizontally in the axial direction and the cylindrical structure of the second pressure roller placed vertically in the axial direction. The winding tube extrusion unit includes a circular extrusion die and a square extrusion die, and the first extrusion outlet is connected to the circular extrusion die or the square extrusion die. The winding forming unit also includes a hollow wall tube flaring mold, which includes a flaring section and a connecting section. One end of the connecting section is connected to the flaring section, and the other end is installed at the end of the winding mold. The diameter of the flaring section is larger than the diameter of the winding mold. The melt extrusion unit includes a flat extrusion die and a square-round extrusion die, and the second extrusion outlet is connected to the flat extrusion die or the square-round extrusion die. When the first extrusion outlet is connected to the circular extrusion die, and the second extrusion outlet is connected to the flat extrusion die, a carat tube can be produced. When the first extrusion outlet is connected to the square extrusion die, the second extrusion outlet is connected to the square-round extrusion die, and the hollow wall tube flaring die is installed on the winding die to prepare the hollow wall tube. In the production of hollow wall tubes, the round and square extrusion dies are used to extrude molten adhesive, and the square extrusion dies are used to extrude wound tubes. The molten adhesive is wound around the surface of the hollow wall tube flaring die to form a flared end. After the flared end is wound, the wound tubes are wound intermittently around the surface of the winding die, while the molten adhesive fills the space between two adjacent wound tubes. The second pressure roller holds the wound tubes, and the first pressure roller fills the space between the wound tubes with the molten adhesive on the surface of the winding die.

2. The integrated production apparatus for kraft tubes and hollow wall tubes according to claim 1, characterized in that, Both the flared section and the connecting section are provided with connectors at the same positions. The connectors include any one of snap-fit ​​connectors, half-fit connectors, or mortise and tenon connectors.

3. The integrated production apparatus for kraft tubes and hollow wall tubes according to claim 1, characterized in that, The extrusion nozzle shape of the square extrusion die includes any one of rectangle, square, parallelogram or trapezoid.

4. The integrated production apparatus for kraft tubes and hollow wall tubes according to claim 1, characterized in that, The extrusion orifice shape of the flat extrusion die includes a rectangle or a parallelogram, and the aspect ratio of the extrusion orifice of the flat extrusion die is 280~320:

1.

5. The integrated production apparatus for kraft tubes and hollow wall tubes according to claim 1, characterized in that, The extrusion nozzle shape of the square and round extrusion die includes any one of the following: rectangle, square, parallelogram, circle or ellipse; When the extrusion orifice shape of the square orifice die is any one of rectangle, square or parallelogram, the length-to-width ratio of the extrusion orifice of the square orifice die is 1~4:1; when the extrusion orifice shape of the square orifice die is circular or elliptical, the length ratio of the major axis to the minor axis of the extrusion orifice of the square orifice die is 1~4:

1.

6. An integrated production method for corrugated tubes and hollow-walled tubes, characterized in that, An integrated production apparatus for kraft tubes and hollow wall tubes as described in any one of claims 1 to 5, comprising, during the production of kraft tubes, the flat extrusion die extrudes molten adhesive, the circular extrusion die extrudes wound tubes, the molten adhesive is wound around the surface of the winding die, and the wound tubes are wound at intervals around the surface of the molten adhesive; In the production of hollow wall tubes, the square and round extrusion dies extrude molten adhesive, the square extrusion dies extrude winding tubes, the winding tubes are wound at intervals around the surface of the winding die, the second pressure roller abuts against the winding tubes, and the first pressure roller fills the space between the winding tubes with the molten adhesive from the surface of the winding die.

7. The application of an integrated production apparatus for corrugated tubes and hollow wall tubes as described in any one of claims 1 to 5 in the field of plastic pipe production.

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