A multi-stage anti-reflux gastrointestinal tube and its extrusion molding equipment and production process

Abstract

The application provides a multi-stage anti-reflux gastrointestinal tube, an extrusion molding equipment and a production process, which comprises a discharge mold, an outer tube body, an inner column, a cutting plate, a separation assembly and a glue injection assembly, and the discharge mold is internally provided with an outer cavity and an inner ring cavity which are independent of each other; the outer tube body is correspondingly arranged outside the outer cavity and is used for extrusion molding of an outer protective tube of the gastrointestinal tube; the inner column corresponding to the inner ring cavity is fixedly arranged inside the outer tube body and is used for extrusion molding of an inner tube of the gastrointestinal tube; and the cutting plate is fixedly arranged at the joint of the discharge mold and the outer tube body to cut the molded gastrointestinal tube. The gastrointestinal tube with multiple inner tubes can be integrally injection molded, so that the processing efficiency is higher, the production speed is faster, and the medium injection pipe, the pressure balance pipe, the pressure reduction pipe and the nutrition pipe are integrally extrusion molded inside the outer protective tube.

Description

Technical Field

[0001] This invention relates to the field of plastic product molding equipment technology, specifically to a multi-stage anti-reflux gastrointestinal tube and its extrusion molding equipment and production process. Background Technology

[0002] A gastrointestinal tube is a medical device suitable for the treatment and care of various gastrointestinal diseases, providing an important auxiliary tool for healthcare workers. Its main features include: ① Drainage function: Drainage is one of the most common applications of gastrointestinal tubes. After gastrointestinal surgeries, such as gastrectomy or intestinal resection, drainage effectively removes residual gastric juice, intestinal juice, bile, and digestive fluids from the gastrointestinal tract. Regular drainage reduces the postoperative burden on the gastrointestinal tract and prevents complications caused by excessive pressure. Furthermore, the drainage function of gastrointestinal tubes plays a crucial role in the treatment of gastrointestinal diseases such as inflammatory bowel disease and gastrointestinal bleeding. Drainage promptly removes inflammatory exudates and bleeding, reducing inflammation at the site of lesion and promoting recovery.

[0003] ② Ventilation function: The gastrointestinal tube also has a ventilation function. In some cases, if too much gas accumulates in the patient's gastrointestinal tract, it can lead to discomfort such as bloating, abdominal distension, and vomiting. Ventilation via the gastrointestinal tube can effectively expel the accumulated gas in the gastrointestinal tract and relieve the patient's discomfort.

[0004] ③ Feeding Function: The application of gastrointestinal tubes in feeding is particularly important. For patients who cannot eat orally, such as critically ill patients, patients with oral or pharyngeal diseases, and children, the feeding function of gastrointestinal tubes can provide nutrients and fluids to meet their physiological needs. This feeding function can be achieved through different methods, such as gravity feeding and pump feeding. Based on the patient's specific condition and the doctor's guidance, appropriate feeding methods and times can be selected to ensure the patient receives adequate nutritional support.

[0005] ④ Excretory function: Gastrointestinal tubes can also be used for the patient's excretory function. In some cases, such as gastrointestinal paralysis or intestinal obstruction in critically ill patients, the patient is unable to empty the food and waste from the gastrointestinal tract normally, which can lead to serious complications. Through the excretory function of the gastrointestinal tube, the contents of the patient's gastrointestinal tract can be emptied regularly or as needed, maintaining the patency and function of the gastrointestinal tract.

[0006] In existing technologies, gastric tubes are generally single-lumen tubes leading to the jejunum or duodenum and / or drainage tubes leading to the abscess cavity. Although using the above-mentioned single-lumen gastric tubes and drainage tubes can ensure sufficient enteral nutrition while also draining gastric juice and pus, when the single-lumen gastric tube and drainage tube are used together, they are inserted twice in the same nostril on the same side of the patient. With the continuous operation time and clinical requirements, repeated operations can damage the nasopharyngeal mucosa, causing discomfort symptoms such as pain and bleeding. At the same time, when the above-mentioned drainage, ventilation and feeding are performed in the gastrointestinal tube, the patient's internal fluid reflux is greatly encountered, which exacerbates the patient's discomfort. However, the sudden obstruction and subsequent impact of the fluid will cause the patient to experience even more intense discomfort.

[0007] Therefore, it is necessary to design an anti-reflux bladder integrated with the gastrointestinal tube to reduce patient discomfort caused by reflux through multiple blockages. It is also necessary to design a gastrointestinal tube that integrates drainage, ventilation, and feeding, and to manufacture the equipment for this integrated multi-stage anti-reflux gastrointestinal tube. This would allow for simultaneous drug administration to the stomach and jejunum and prevention of gastric reflux during a single intubation, reducing the suffering experienced by patients who require two indwelling tubes in clinical practice. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a multi-stage anti-reflux gastrointestinal tube, its extrusion molding equipment, and production process, thus solving the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: A multi-stage anti-reflux gastrointestinal tube extrusion molding device includes a discharge mold, an outer tube body, an inner column, a cutting plate, a release assembly, and a glue injection assembly. The discharge mold has independent outer cavities and inner ring cavities inside; The outer tube body is corresponding to and externally disposed on the outer cavity for extruding and molding the outer protective tube of the gastrointestinal tube. An inner column corresponding to the inner ring cavity is fixed inside the outer tube body for extruding and molding the inner tube of the gastrointestinal tube. The cutting plate is fixed at the junction of the discharge mold and the outer tube to cut the formed gastrointestinal tube; The detachment assembly includes an outer suction ring, a spring rod, and a suction column, wherein... The outer suction ring is fixed to the outer edge of one end of the spring rod and is arranged correspondingly to the outer tube body; The suction column is fixed to the outer edge of the other end of the spring rod and is arranged correspondingly to the inner column; When the spring rod is compressed and the suction rod abuts against the inner molded column, the outer suction ring moves closer to the outer tube body; when the outer suction ring abuts against the outer tube body and stretches the spring rod, the outer tube body first undergoes displacement relative to the inner molded column, so that the outer protective tube and the inner tube are separated and there is a length difference between them in the axial length, and a cavity is left between the inner tube and the inner molded column to facilitate glue injection. The dispensing assembly includes a plug, a sealing plate, and a dispensing head assembly, wherein... The plug is corresponding to and externally installed on the outer tube body; The sealing plate is fixed to the outer end of the sealing plug. When the sealing plug is embedded in the outer tube, the sealing plate fits tightly against the inner cavity of the outer protective tube and forms an injection cavity with the inner cavity of the outer protective tube. The glue injection head assembly is fixed on the sealing plate and injects glue into the glue injection cavity and the cavity respectively.

[0010] Furthermore, the injection assembly also includes a perforation mechanism, wherein the perforation mechanism includes a side support plate, a through pin, a first mating block, and a second abutment block. The side support plate is fixed to the outer wall of the plug, and through pins are vertically spaced through the outer end of the side support plate. The outer ends of the through pins are all connected to the first mating block. A spring is installed between the first mating block and the side support plate, and a second abutment block is provided on its outer side. The second abutment block presses down on the first mating block, causing the through pins to pass through the outer protective tube and the inner tube to open a plurality of injection holes.

[0011] Furthermore, a push rod is integrally provided on the side of the second abutment block; a pull rod is movably connected to the push rod away from the connection point with the second abutment block; wherein, the pull rod is fixed to the closed end of the outer tube body away from the outer cavity through a first fixing plate; a turntable is connected to the outer edge of the first fixing plate through a fixed connecting column, for driving the outer tube body to cycle between the discharge mold, the release component, and the glue injection component; one end of the inner mold column is vertically connected to the inner wall of the first fixing plate, and the other end of the inner mold column is vertically connected to a constraint plate; the constraint plate is fixedly installed at the open end of the outer tube body near the outer cavity; when the push rod pushes the pull rod, the pull rod drives the outer tube body and the constraint plate to slide outward as a whole, at this time, the area between the sealing plate, the constraint plate, and the outer tube body is the glue injection cavity.

[0012] Furthermore, both the outer tube and the side of the constraint disc are provided with clearance grooves to avoid the through nails.

[0013] Furthermore, the glue injection head assembly includes a first glue injection head and a second glue injection head, wherein a first support tube is fixedly disposed within the sealing plug; a glue-gathering head is provided at the output end of the first support tube; a second glue injection head and a second support tube penetrating the sealing plate are respectively fixedly disposed outside the glue-gathering head; a first glue injection head is fixedly disposed at the end of the second support tube; a reserved hole is provided on the sealing plate for the inner tube to pass through; when the sealing plug is embedded in the outer tube body, the first glue injection head extends into the glue injection cavity, and the inner tube passes through the reserved hole; the second glue injection head is inserted into the cavity left between the inner tube and the inner molded column.

[0014] Furthermore, it also includes an airbag ring mounting assembly, which includes a side frame, a first positioning ring, a second positioning ring, a longitudinal opening and closing assembly, and an axial opening and closing assembly. The side frame is fixed to one side of the discharge mold, with the longitudinal opening and closing assembly mounted at the top and the axial opening and closing assembly at the bottom. The first and second positioning rings are mirror images of each other, connected at their midpoints by a first bidirectional spring rod, connected at their tops by a second bidirectional spring rod, and connected at their bottoms by a third bidirectional spring rod. The output end of the longitudinal opening and closing assembly is connected to the first bidirectional spring rod to drive the first and second positioning rings to open longitudinally, allowing the airbag ring to be placed on the outer wall of the outer protective tube. The output end of the axial opening and closing assembly respectively abuts against the bottom of the first and second positioning rings, driving them to open axially, allowing the airbag ring to be fitted onto the outer protective tube.

[0015] Furthermore, the first positioning ring is composed of a first half-ring and a second half-ring arranged in a mirror symmetrical manner; the inner side of the first half-ring is provided with a reserved half-sleeve, which is used as the positioning area for the airbag ring sleeve; the bottom inner wall of the second half-ring is provided with a second mating block, which abuts against the axial opening and closing component.

[0016] Furthermore, the airbag ring includes a first expansion portion, a fixing portion, and a second expansion portion, wherein the fixing portion is located between the first expansion portion and the second expansion portion; the fixing portion, the outer end of the first expansion portion, and the outer end of the second expansion portion are all fixed to the outer protective tube; the first expansion portion and the second expansion portion are both independently connected to the inner tube.

[0017] As a second aspect of the present invention, a manufacturing process for producing multi-stage anti-reflux gastrointestinal tubes using extrusion molding equipment is provided, comprising the following steps: S1. Forming and Transfer of Gastrointestinal Tube: Prepare transparent polyurethane material granules and process the gastrointestinal tube by injection molding using an extruder with an external discharge mold; the formed gastrointestinal tube enters the transfer mold, and after reaching the specified length, the cutting plate cuts off the formed gastrointestinal tube. S2, gastrointestinal tube detachment: the external suction ring and suction column respectively use negative pressure to draw the outer protective tube and the inner tube, so that the open end of the outer protective tube extends outward to the output end of the inner tube; S3. Glue Injection: The glue injection assembly is simultaneously inserted into the open end of the outer protective tube and the inside of the inner tube. At the same time, a closed glue injection cavity is left between the glue injection assembly and the outer tube, and a cavity is left between the inner tube and the inner molded column. The perforation mechanism opens injection holes at the output ends of the outer protective tube and the inner tube respectively. The glue injection assembly simultaneously injects resin into the glue injection cavity and the cavity to seal the output end of the inner tube and form a resin filling block. The resin filling block is sealed inside the outer protective tube, and the inner tube seals through the resin filling block. The perforation mechanism continues to open another injection hole at the resin filling block. S4. Opening: Drain holes arranged in a ring array are opened on the outer edge of the outer protective tube at the end away from the glue injection cavity; S5. Airbag ring installation: The airbag ring installation assembly seals the airbag ring onto the outer wall of the outer protective tube, and respectively installs the first expansion part and the second expansion part of the airbag ring onto the other injection hole to form an anti-reflux airbag inside the inner tube to block the reflux of liquid in the patient's gastrointestinal tract. S6. Cooling and solidification yields a multi-stage anti-reflux gastrointestinal tube.

[0018] As a third aspect of the present invention, a gastrointestinal tube is provided, manufactured using an extrusion molding equipment and a multi-stage anti-reflux gastrointestinal tube production process, comprising: The outer protective tube and the inner tube disposed inside the outer tube, wherein the output end of the outer protective tube is exposed to the output end of the inner tube, and a discharge hole is provided in the exposed part; the outer wall of the outer protective tube is fitted with an air bladder ring to form an anti-reflux air bladder inside the inner tube to block the reflux of liquid in the patient's gastrointestinal tract.

[0019] This invention provides a multi-stage anti-reflux gastrointestinal tube, its extrusion molding equipment, and production process. Compared with the prior art, it has the following advantages: 1. To address the problem in existing technologies where gastrointestinal tubes irritate the patient's stomach and intestinal tissues, leading to increased discomfort due to reflux of internal fluids, this invention incorporates a first expansion section and a second expansion section. This allows the media injection tube to be filled with high-pressure gas or liquid into both expansion sections. The first expansion section expands to become a primary anti-reflux balloon, and the second expansion section expands to become a secondary anti-reflux balloon. The primary anti-reflux balloon blocks most of the refluxed fluid in the gastrointestinal tract, while the remaining refluxed fluid passes through the secondary anti-reflux balloon, thus buffering the patient's discomfort. Simultaneously... Since the anti-backflow airbag is formed by an airbag ring, the integrated airbag ring has a first expansion part, a second expansion part, and a fixing part, which can achieve sealing and expansion in a designated area. In addition, the integrated airbag ring can be expanded and then contracted to be positioned on the outer protective tube by the airbag ring installation component, so as to realize the quick installation of the airbag ring. 2. To avoid the discomfort symptoms such as pain or bleeding caused by the two separate insertions of single-lumen gastric tubes and drainage tubes in the existing technology, the present invention enables the integrated injection molding of gastrointestinal tubes with multiple inner tubes by setting up a material discharge mold, switching component, detachment component, glue injection component and airbag ring installation component. This results in higher processing efficiency and faster production speed. The media injection tube, pressure balance tube, decompression tube and nutrition tube are integrally extruded inside the outer protective tube. 3. To avoid the influence of existing technologies on manufacturing techniques and processes, such as the current process of extruding transparent polyurethane material through a single-screw extruder to obtain the gastrointestinal tube after pretreatment, which requires adding barium sulfate to the polyurethane main material, leading to a decrease in the mechanical strength of the gastrointestinal tube and thus the risk of breakage, this invention proposes a detachable component design, which can simultaneously achieve the following effects: 1) The detachable component can pull the outer protective tube outward to the output end. The extended outer protective tube can be separated from the four internal tubes, which makes it easy to open the discharge hole in the extended part of the outer protective tube without affecting the four internal tubes. 2) The detachment component can pull the medium injection tube outward to the output end. The extended medium injection tube can leave a cavity with the first inner column inside. The cavity facilitates the subsequent sealing of the output end of the medium injection tube, so that the medium injection tube has only an open input end and a closed output end. 3) The detachment component uses negative pressure suction, which is easy to operate, does not damage the tube, can achieve targeted traction, and tests the toughness and mechanical strength of the gastrointestinal tube during the traction process. 2. Since patients often use gastrointestinal tubes for more than a month, and these tubes are constantly exposed to gastric acid, the risk of breakage or damage increases dramatically. To avoid this, this invention proposes a glue-injection assembly design that simultaneously achieves the following effects: 1) The injected adhesive can simultaneously seal and fix the medium injection pipe, pressure balance pipe, pressure reducing pipe and nutrition pipe, so that these four pipes are stably placed inside the outer protective pipe. 2) The injected adhesive will not block the pressure balancing tube, pressure reducing tube, and feeding tube, allowing the pressure balancing tube, pressure reducing tube, and feeding tube to function normally to the gastrointestinal tract, while blocking the direct corrosion of the tube body by gastric juice and gastric acid. 3) After the adhesive solidifies, it forms a resin filler block, so that the first expansion part and the second expansion part of the airbag ring can be connected to the medium injection pipe. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the structure of the gastrointestinal tube extrusion molding equipment of the present invention is shown; Figure 2 A schematic diagram of the gastrointestinal tube structure of the present invention is shown; Figure 3 It shows Figure 2 A schematic diagram of the side cross-section of the gastrointestinal tract at point AA; Figure 4 It shows Figure 3 A schematic diagram of the airbag ring in its inflated state. Figure 5 It shows Figure 2 A schematic diagram of the side cross-section of the gastrointestinal tract at the BB point; Figure 6 It shows Figure 2 A schematic diagram of the side cross-section of the gastrointestinal tract at point CC; Figure 7 It shows Figure 2 A schematic diagram of the lateral cross-sectional structure of the gastrointestinal tract at point DD; Figure 8 It shows Figure 1 Another perspective structural diagram; Figure 9 A schematic diagram of the transfer mold structure of the present invention is shown; Figure 10 A schematic diagram of the cooperative structure of the guide post, tie rod and first fixing plate of the present invention is shown; Figure 11 A schematic diagram of the structure of the transfer mold and the gastrointestinal tube of the present invention is shown; Figure 12 A schematic diagram of the overall structure of the present invention detached from the components is shown; Figure 13 This diagram illustrates the initial contact state between the detachment component of the present invention and the gastrointestinal tube. Figure 14 This diagram illustrates the structure of the gastrointestinal tract in the detachment component of the present invention. Figure 15 A schematic diagram of the dispensing assembly and perforation mechanism of the present invention is shown; Figure 16 A schematic diagram of the inner sealing structure of the present invention is shown; Figure 17 A schematic diagram of the external structure of the dispensing assembly of the present invention in the inserted state is shown; Figure 18 A schematic diagram of the perforation mechanism of the present invention in its arrangement state is shown; Figure 19 A schematic diagram of the internal structure of the glue dispensing assembly of the present invention in the inserted state is shown; Figure 20 A schematic diagram of the internal cross-sectional structure of the glue injection assembly of the present invention in the inserted state is shown; Figure 21 It shows Figure 20 A schematic diagram of the internal cross-sectional structure of the glue injection assembly in the inserted state; Figure 22 A schematic diagram of the airbag ring mounting assembly structure of the present invention is shown; Figure 23 A schematic diagram of the first positioning ring connection structure of the present invention is shown; Figure 24 The production process flow diagram of the multi-stage anti-reflux gastrointestinal tube of the present invention is shown.

[0022] Explanation of reference numerals in the attached figures 1-Injection molding machine, 12-Outlet mold, 121-Cooling ring cover, 122-Outer cavity, 123-First inner ring cavity, 124-Second inner ring cavity, 125-Third inner ring cavity, 126-Fourth inner ring cavity; 2-Transfer mold, 21-Outer tube body, 211-Inner guide hole, 212-Guide post, 213-Tie rod, 22-First fixing plate, 221-Through hole, 222-Connecting post, 23-First spring rod, 24-First inner molded post, 25-Second inner molded post, 26-Third inner molded post, 27-Fourth inner molded post, 28-Constraint plate, 29-Allowing groove; 3-Switching component, 33-Turntable; 4-Cutting assembly, 41-Support frame, 42-First drive rod, 43-Cutting plate; 5-Disengagement assembly, 51-Second drive rod, 52-Inner connecting rod, 53-Outer suction ring, 54-Second spring rod, 55-Second fixing plate, 56-Suction column, 57-Matching column; 6-Glue injection assembly, 61-Third drive rod, 62-Plug, 621-Back plate, 63-Inner sealant, 631-Glue injection head, 632-Sealing plate, 6321-Pre-drilled hole, 633-First glue injection head, 634-First support tube, 635-Second glue injection head, 636-Second support tube, 64-Side support plate, 65-First mating block, 651-First through pin, 652-Second through pin; 7-Airbag ring mounting assembly, 71-Fourth drive rod, 72-Side frame, 73-Longitudinal opening and closing assembly, 731-Fifth drive rod, 732-First middle plate, 733-Slant plate, 734-Guide frame, 735-Drive plate, 74-Axial opening and closing assembly, 741-Sixth drive rod, 742-Second middle plate, 743-First abutment frame, 744-Third spring rod, 745-Pressure block, 75-First positioning ring, 751-First half-ring body, 7511-Reserved half-sleeve, 7512-Second mating block, 752-Second half-ring body, 76-Second positioning ring, 77-First bidirectional spring rod, 78-Second bidirectional spring rod, 79-Third bidirectional spring rod; 8-Perforation mechanism, 81-Seventh drive rod, 82-Integrated plate, 83-Second contact block, 84-Top rod; 9-Gastrointestinal tube, 91-Outer protective tube, 911-Discharge hole, 912-Fifth injection hole, 913-Sixth injection hole, 92-Airbag ring, 921-First expansion part, 922-Fixing part, 923-Second expansion part, 93-Media injection tube, 931-First injection hole, 932-Second injection hole, 94-Pressure balance tube, 95-Decompression tube, 96-Nutrition tube, 97-Resin filler block, 971-Third injection hole, 972-Fourth injection hole. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] To address the problem in the prior art where single-lumen gastric tubes and drainage tubes are inserted in two separate steps, causing discomfort such as pain or bleeding for the patient, this invention utilizes a coordinated design of a discharge mold, switching assembly, disengagement assembly, glue injection assembly, and balloon ring installation assembly. This enables the integrated injection molding of gastrointestinal tubes with multiple inner tubes, resulting in higher processing efficiency and faster production speed. The media injection tube, pressure balancing tube, decompression tube, and feeding tube are integrally extruded within the outer protective tube. The following describes a multi-stage anti-reflux gastrointestinal tube, its extrusion molding equipment, and production process.

[0025] As a first aspect of the present invention, such as Figure 1 , Figure 8As shown, the present invention provides a multi-stage anti-reflux gastrointestinal tube and its extrusion molding equipment, including an injection molding machine 1. The inlet end of the injection molding machine 1 is connected to a feeding hopper, and the outlet end is connected to a discharge mold 12. A cooling ring cover 121 is fitted on the outlet end of the outer wall of the discharge mold 12. Switching components 3 are installed at intervals at the discharge end of the discharge mold 12. The side of the switching components 3 near the discharge injection molding machine 1 is provided with a ring array of transfer molds 2. The side of the injection molding machine 1 is equipped with a release component 5, a glue injection component 6, and an airbag ring mounting component 7. A cutting component 4 is installed on the top surface of the injection molding machine 1. The switching components 3 are used to drive the transfer molds 2 to cycle through the discharge mold 12, the release component 5, the glue injection component 6, and the airbag ring mounting component 7.

[0026] As a second aspect of the invention, such as Figures 2-3 , Figures 5-7 As shown, a gastrointestinal tube 9 is produced using the aforementioned extrusion molding equipment. It includes an outer protective tube 91 and an inner tube disposed inside the outer tube. The inner tube consists of a medium injection tube 93, a pressure balancing tube 94, a pressure reducing tube 95, and a nutrition tube 96. The output end of the outer protective tube 91 is exposed to the output ends of the medium injection tube, the pressure balancing tube, the pressure reducing tube, and the nutrition tube, and the exposed part has a discharge hole 911. An airbag ring 92 is fitted on the outer wall of the outer protective tube 91. The airbag ring includes a first expansion part 921, a fixing part 922, and a second expansion part 923. The fixing part is located between the first expansion part and the second expansion part. The fixing part, the outer end of the first expansion part, and the outer end of the second expansion part are all fixed to the outer protective tube. The first expansion part and the second expansion part are independently connected to the medium injection tube.

[0027] Based on the above technical concept, it is understood that, in order to solve the problem in the prior art where the gastrointestinal tube irritates the patient's stomach and intestinal tissues, leading to increased discomfort due to the reflux of internal fluids, this invention, by setting a first expansion part and a second expansion part, allows the medium injection tube to be filled with high-pressure gas or liquid into the first expansion part and the second expansion part. This transforms the first expansion part into a primary anti-reflux airbag, and the second expansion part into a secondary anti-reflux airbag. The primary anti-reflux airbag blocks most of the refluxed fluid in the gastrointestinal tract, while the remaining refluxed fluid passes through the secondary anti-reflux airbag, thus buffering the patient's discomfort. At the same time, since the anti-reflux airbag is formed by an airbag ring, the integrated airbag ring provides the first expansion part, the second expansion part, and the fixing part, enabling it to achieve sealing and expansion in designated areas. Furthermore, the integrated airbag ring can be expanded and then contracted to be positioned on the outer protective tube by the airbag ring installation component, achieving rapid installation of the airbag ring.

[0028] like Figure 9As shown, in an embodiment of the present invention, in order to enable the above-mentioned ejector mold 12 to achieve the above-mentioned integrated injection molding function, the present invention proposes that the ejector mold 12 has an independently arranged outer cavity 122, a first inner ring cavity 123, a second inner ring cavity 124, a third inner ring cavity 125, and a fourth inner ring cavity 126 inside; the first inner ring cavity 123, the second inner ring cavity 124, the third inner ring cavity 125, and the fourth inner ring cavity 126 are arranged in a cross shape in the outer cavity 122.

[0029] It should be noted that the outer cavity 122 is used to extrude the outer protective tube 91, the first inner ring cavity 123 is used to extrude the medium injection tube 93, the second inner ring cavity 124 is used to extrude the pressure balancing tube 94, the third inner ring cavity 125 is used to extrude the pressure reducing tube 95, and the fourth inner ring cavity 126 is used to extrude the nutrient tube 96.

[0030] Based on the above technical concept, independent tubes can be extruded from the five independent cavities of the discharge mold 12, thereby achieving the integrated extrusion molding of the four internal tubes and the outer protective tube 91, resulting in a gastrointestinal tube that integrates drainage, ventilation, and feeding.

[0031] like Figure 9 , Figures 10-11 As shown, in one embodiment of the present invention, the transfer mold 2 includes an outer tube 21 and a first fixing plate 22. The inner end of the outer tube 21 is open and the outer end is closed. The open end of the outer tube 21 faces the discharge mold 12. The closed end of the outer tube 21 is vertically provided with a plurality of guide posts 212 and an L-shaped pull rod 213. The interior of the first fixing plate 22 is provided with a through hole 221 for the guide posts 212 and the pull rod 213 to slide through. The switching assembly 3 is fixedly connected to the center of the outer wall of the first fixing plate 22 by a connecting post 222. The inner wall of the first fixing plate 22 is vertically fixed with a first inner post 24, a second inner post 25, a third inner post 26, and a fourth inner post 27. The center of the inner wall of the first fixing plate 22 is vertically provided with a first spring rod 23. The closed end of the outer tube 21 has four inner guide holes 211, through which the first inner post 24, the second inner post 25, the third inner post 26, and the fourth inner post 27 respectively pass. The inner end of the first spring rod 23 is connected to the center of the closed end of the outer tube 21. The open end of the outer tube 21 has a constraint disk 28 fixed inside, and the constraint disk 28 has four through holes. The inner ends of the first inner post 24, the second inner post 25, the third inner post 26, and the fourth inner post 27 are coaxially spaced into the corresponding through holes of the constraint disk 28. The first inner post 24 is arranged corresponding to the first inner ring cavity 123, the second inner post 25 is arranged corresponding to the second inner cavity, the third inner post 26 is arranged corresponding to the third inner cavity, the fourth inner post 27 is arranged corresponding to the fourth inner cavity, and the outer tube 21 is arranged corresponding to the outer cavity 122.

[0032] Based on the above technical concept, it should be noted that the design of the constraint disk 28 can achieve the following effects: 1) The through hole in the constraint disk 28 and the inner column inside it form the insertion area of ​​the inner tube, which can support and block each inner tube; 2) The outside of the constraint disk 28 can support the outer protective tube 91 from the inside, realizing the positioning of the outer protective tube 91; 3) The constraint disk 28 can guide the displacement of the tie rod 213 and the guide column 212.

[0033] The design of the L-shaped tie rod 213 allows the outer tube 21 and the constraint plate 28 to be pulled inward as a whole, so as to form a resin injection cavity. At the same time, it exposes the four inner tubes and their inner columns, so that the resin filling block 97 can fix the exposed parts of the four inner tubes into one piece.

[0034] As an embodiment of the present invention, in order to avoid the influence of manufacturing technology and manufacturing process on the prior art, such as in the process of manufacturing gastrointestinal tubes, after pretreatment of transparent polyurethane material, the gastrointestinal tube is extruded through a single screw extruder. Since it is necessary to add barium sulfate to the polyurethane main material, the mechanical strength of the gastrointestinal tube will decrease, thereby causing the risk of breakage and damage to the gastrointestinal tube.

[0035] This invention proposes a detachment component design that can pull the outer protective tube outwards towards the output end. The extended outer protective tube can be separated from the four internal tubes, thus facilitating the creation of a discharge hole in the extended portion of the outer protective tube without affecting the four internal tubes. The detachment component can also pull the media injection tube outwards towards the output end, and the extended media injection tube can create a cavity with the first internal column. This cavity facilitates subsequent sealing of the output end of the media injection tube, resulting in a structure where only the input end of the media injection tube is open and the output end is closed. The detachment component uses negative pressure suction, which is simple to operate, causes no damage to the tube, allows for targeted traction, and tests the toughness and mechanical strength of the gastrointestinal tube during the traction process.

[0036] In specific implementation, such as Figures 12-14 As shown, the detachment assembly 5 includes a second drive rod 51, an inner connecting rod 52, an outer suction ring 53, and a suction column 56. The output end of the second drive rod 51 is connected to the inner connecting rod 52, and the two ends of the inner connecting rod 52 are fixedly connected to the outer suction ring 53. The outer suction ring 53 is arranged correspondingly to the outer tube body 21 of the outer protective tube 91. A second spring rod 54 is vertically provided at the center of the inner connecting rod 52. The second spring rod 54 passes through the outer suction ring 53 and its end is vertically fixedly connected to the second fixing plate 55. A suction column 56 is vertically provided above the outer wall of the second fixing plate 55. The suction column 56 is arranged correspondingly to the medium injection pipe 93 on the outer wall of the first inner column 24.

[0037] The second drive rod 51 drives the inner connecting rod 52, the outer suction ring 53, and the suction column 56 to move inward synchronously. The suction column 56 first contacts the first inner column 24 and compresses the second spring rod 54. The suction column 56 then contacts the medium injection pipe 93. The outer suction ring 53 then contacts the outer protective pipe 91. After the outer suction ring 53 contacts the outer protective pipe 91, the outer suction ring 53 adsorbs the outer protective pipe 91 and moves it outward. When the second spring rod 54 returns to its original position, the suction column 56 adsorbs the medium injection pipe 93 and moves it outward.

[0038] Meanwhile, a mating post 57 is vertically provided below the outer wall of the second fixed plate 55. The mating post 57 is arranged correspondingly to the fourth inner post 27, and the mating post 57 and the fourth inner post 27 cooperate to abut against each other to ensure the stability of the inward movement of the outer suction ring 53. It can be understood that the reason for setting a mating post 57 below the suction post 56 is so that when the suction post 56 abuts against the first inner post 24, the mating post 57 abuts against the fourth inner post 27. In this way, the upper and lower parts simultaneously abut against the second spring rod 54 in opposite directions, ensuring the stability of the second spring rod 54 supported by the abutment.

[0039] As an embodiment of the present invention, since the patient uses a gastrointestinal tube for more than a month, and the gastrointestinal tube is in an environment soaked in gastric acid for a long time, the risk of the gastrointestinal tube breaking and rupture also increases sharply. In order to avoid the above situation,

[0040] This invention proposes a glue injection assembly design where the injected glue can simultaneously seal and fix the media injection tube, pressure balancing tube, pressure reducing tube, and nutrition tube, ensuring that these four tubes are securely placed inside the outer protective tube. The injected glue will not block the pressure balancing tube, pressure reducing tube, and nutrition tube, allowing them to function normally to the gastrointestinal tract, while simultaneously preventing direct corrosion of the tubes by gastric juice and gastric acid. After the glue solidifies, it forms a resin filling block, facilitating communication between the first and second expansion parts of the airbag ring and the media injection tube.

[0041] In specific implementation, such as Figures 15-16As shown, the dispensing assembly 6 includes a third drive rod 61, a plug 62, and an inner sealant 63. The output end of the third drive rod 61 is connected to a back plate 621, which is located on the back of the plug 62. The inner sealant 63 is installed on the outer end of the plug 62. The inner sealant 63 includes a first support tube 634 and a dispensing head 631. The first support tube 634 is fixed inside the plug 62, and the output end of the first support tube 634 is provided with a dispensing head 631. A second support tube 636 and a second dispensing head 635 are connected in parallel to the outside of the dispensing head 631. A sealing plate 632 is vertically fixed on the outer wall of the second support tube 636, and the interior of the sealing plate 632 is positioned relative to the second dispensing head 635. A pre-drilled hole 6321 is provided at the location, and a first injection head 633 is fixedly mounted on the extended end of the second support tube 636. In S3, the third drive rod 61 drives the sealing plug 62 to embed into the outer tube 21. The area between the sealing plate 632, the constraint disk 28, and the outer tube 21 is the injection cavity. The first injection head 633 extends into the injection cavity, the output end of the medium injection tube 93 passes through the pre-drilled hole 6321, and the second injection head 635 is inserted into the output end of the medium injection tube 93, leaving a gap between it and the first inner molded column 24. The ends of the first inner molded column 24, the second inner molded column 25, the third inner molded column 26, and the fourth inner molded column 27 are all embedded in the groove of the sealing plate 632. All parts of the molding equipment that come into contact with the adhesive are coated with an anti-stick coating.

[0042] Based on the above technical concept, a sealing plate 632 is designed to form a glue injection cavity with the storage state constraint plate. The sealing plate 632 has a reserved hole 6321 inside, which allows the extended part of the medium injection tube 93 to pass through. In this way, the outer wall of the medium injection tube 93 can be fixed in the resin sealing block and the end of the medium injection tube 93 can be sealed without affecting each other. At the same time, two structures are designed: a first glue injection head 633 and a second glue injection head 635. The first glue injection head 633 can inject glue into the glue injection cavity, and the second glue injection head 635 can specifically inject glue to seal the medium injection tube 93.

[0043] like Figure 15 , Figures 17-20 As shown, a perforation mechanism 8 is fixedly connected to the outer wall of the back plate 621. The perforation mechanism 8 includes a side support plate 64, which is vertically disposed on the outer wall of the back plate 621. A first through pin 651 and a second through pin 652 are vertically passed through the outer end of the side support plate 64. A first mating block 65 is provided at the outer end of the first through pin and the second through pin. A spring is installed between the first mating block 65 and the side support plate 64. A second abutment block 83 is provided on the outer side of the first mating block 65. The second abutment block 83 is disposed on the outer wall of the integrated plate 82. A seventh drive rod 81 is vertically disposed on the inner wall of the integrated plate 82. The seventh drive rod 81 and the third drive rod 61 are fixed together in parallel. A top rod 84 is vertically disposed on the outer wall of the integrated plate 82. The top rod 84 is located on the side of the second abutment block 83.

[0044] It should be noted that, as Figure 21 As shown, in step S3 above, when the third drive rod 61 drives the sealing plug 62 to embed into the outer tube 21, the seventh drive rod 81 drives the top rod 84 and the second abutment block 83 to move outward; the top rod 84 pushes the pull rod 213, causing the outer tube 21 and the constraint plate 28 to slide outward as a whole, so as to leave a gap between them and the sealing plate 632; the second abutment block 83 presses down the first mating block 65, so that the first through pin 651 and the second through pin 652 pass through the outer protective tube 91 and the medium injection tube 93, so as to open the first injection hole 931, the second injection hole 932, the fifth injection hole 912, and the sixth injection hole 913.

[0045] When the seventh drive rod 81 drives the integrated plate 82 to move, the integrated plate 82 drives the top rod 84 and the second abutment block 83 to move synchronously. In this way, the second abutment block 83 abuts against the first mating block 65 and moves inward, the first through pin 651 and the second through pin 652 start to move, and the top rod 84 abuts against the pull rod 213, causing the outer tube 21 and the constraint plate 28 to move outward as a whole. The two actions are performed synchronously, which is more efficient.

[0046] In addition, such as Figure 9 As shown, both the outer tube 21 and the constraint plate 28 have clearance grooves 29 on their sides to avoid the first through pin 651 and the second through pin 652. The design of the clearance grooves 29 ensures that the withdrawal of the outer tube 21 and the constraint plate 28 does not affect the movement of the first through pin 651 and the second through pin 652, and the two will not interfere with each other.

[0047] like Figure 22-23 As shown, in one embodiment of the present invention, the airbag ring mounting assembly 7 includes a fourth drive rod 71, a side frame 72, a first positioning ring 75, and a second positioning ring 76; the output end of the fourth drive rod 71 is connected to the side frame 72, and a longitudinal opening and closing assembly 73 is installed at the top end of the side frame 72, and an axial opening and closing assembly 74 is installed at the bottom end; the first positioning ring 75 and the second positioning ring 76 are mirror-symmetrically arranged, the middle side of the first positioning ring 75 and the middle side of the second positioning ring 76 are connected by a first bidirectional spring rod 77, the top of the first positioning ring 75 and the top of the second positioning ring 76 are connected by a second bidirectional spring rod 78, and the bottom of the first positioning ring 75 and the bottom of the second positioning ring 76 are connected by a third bidirectional spring rod 79; the output end of the longitudinal opening and closing assembly 73 is connected to the first bidirectional spring rod 77, and the output end of the axial opening and closing assembly 74 abuts against the bottom inner side of the first positioning ring 75 and the second positioning ring; The longitudinal opening and closing assembly 73 is used to drive the first positioning ring 75 and the second positioning ring 76 to open longitudinally, so that the airbag ring 92 is placed on the outer wall of the outer protective tube 91; the axial opening and closing assembly 74 is used to drive the first positioning ring 75 and the second positioning ring 76 to open axially, so that the airbag ring 92 is fitted onto the outer protective tube 91.

[0048] like Figure 4 As shown, based on the above technical concept, an airbag ring 92 is adopted. In this way, the airbag ring 92 can be directly fitted onto the outer wall of the outer protective tube 91 and placed on the outer wall of the fifth injection hole 912. The two ends of the airbag ring 92 can be heat-sealed onto the outer protective tube 91, and the airbag ring 92 can be sealed with the outer protective tube 91 as one unit, while ensuring the flatness of the outer wall.

[0049] In one embodiment of the present invention, the first positioning ring 75 may be composed of a first half-ring 751 and a second half-ring 752 arranged in a mirror symmetry. The inner side of the first half-ring 751 is provided with a reserved half-sleeve 7511, which is used as the fitting positioning area for the airbag ring sleeve 92. The bottom inner wall of the second half-ring 752 is provided with a second mating block 7512, which abuts against the axial opening and closing assembly 74.

[0050] The two ends of the airbag sleeve 92 are first fitted onto the reserved half sleeve 7511. The longitudinal opening and closing component 73 drives the first positioning ring 75 and the second positioning ring 76 to open longitudinally, thus expanding the airbag sleeve 92 so that the airbag sleeve 92 can be fitted onto the outer protective tube 91. After it is moved into place, the axial opening and closing component 74 drives the first positioning ring 75 and the second positioning ring 76 to open axially, so that the expanded airbag sleeve 92 can be disengaged from the reserved half sleeve 7511 and fitted onto the outer protective tube 91.

[0051] The longitudinal opening and closing assembly 73 includes a guide frame 734, which is located on the top side of the side frame 72. A fifth drive rod 731 is provided in the middle of the surface of the guide frame 734. The top of the fifth drive rod 731 is connected to the first middle plate 732. The two ends of the first middle plate 732 are symmetrically hinged with inclined plates 733. The bottom ends of the two inclined plates 733 are each hinged with a set of drive plates 735. The two sets of drive plates 735 are slidably installed in the sliding grooves at both ends of the guide frame 734. The bottom end of the drive plate 735 is fixedly connected to the first bidirectional spring rod 77.

[0052] The axial opening and closing assembly 74 includes a sixth drive rod 741, which is located at the bottom of the side prosthesis. The top of the sixth drive rod 741 is provided with a second middle plate 742. The two ends of the second middle plate 742 are symmetrically provided with U-shaped first abutment frames 743. The top of the second middle plate 742 is provided with a third spring rod 744, and the top of the third spring rod 744 is provided with a pressure block 745. Each first abutment frame corresponds to two second mating blocks 7512.

[0053] like Figure 1As shown in the figure, in one embodiment of the present invention, the cutting assembly 4 includes a support frame 41, a first drive rod 42, and a cutting plate 43. One end of the support frame 41 is fixed to the top surface of the extruder, and the other end is connected to the vertically downward cutting plate 43. The cutting plate 43 faces the junction of the discharge mold 12 and the transfer mold 2. The switching assembly 3 includes a column, a switching motor, and a turntable 33. Each transfer mold 2 is fixed on the turntable 33. The back of the turntable 33 is connected to the switching motor, and the switching motor is fixedly connected to the column.

[0054] As a third aspect of the present invention, such as Figure 1 , Figure 8 , Figure 24 As shown, a manufacturing process for producing multi-stage anti-reflux gastrointestinal tubes using extrusion molding equipment is proposed. The specific implementation includes the following steps: S1, gastrointestinal tract 9 shaping and transfer: a) Prepare transparent polyurethane material granules and feed them into the hopper, then transfer them to the extruder; b) The injection molding machine 1 simultaneously injection molds the gastrointestinal tube 9. The formed gastrointestinal tube 9 enters the transfer mold 2. The outer cavity 122 is used to extrude the outer protective tube 91, the first inner ring cavity 123 is used to extrude the medium injection tube 93, the second inner ring cavity 124 is used to extrude the pressure balance tube 94, the third inner ring cavity 125 is used to extrude the pressure reducing tube 95, and the fourth inner ring cavity 126 is used to extrude the nutrition tube 96. c) After the gastrointestinal tube 9 of a specified length is inserted into the transfer mold 2, the first drive rod 42 drives the cutting plate 43 to move downward and cut the gastrointestinal tube 9. S2, gastrointestinal tube 9 detached: d) Disconnect the negative pressure suction of component 5 from the outer protective tube 91 and the medium injection tube 93, so that the output ends of both the outer protective tube 91 and the medium injection tube 93 extend outwards to the pressure balance tube 94, the pressure reducing tube 95, and the nutrition tube 96, with the output end of the outer protective tube 91 extending beyond the output end of the medium injection tube 93; In specific implementation: The second drive rod 51 drives the inner connecting rod 52, the outer suction ring 53, and the suction column 56 to move inward synchronously. The suction column 56 first contacts the first inner molded column 24, the mating column 57 contacts the fourth inner molded column 27, and compresses the second spring rod 54. The suction column 56 then contacts the medium injection tube 93, and the outer suction ring 53 then contacts the outer protective tube 91. After the outer suction ring 53 contacts the outer protective tube 91, the outer suction ring 53 adsorbs the outer protective tube 91 and moves it outward. After the second spring rod 54 returns to its original position, the suction column 56 adsorbs the medium injection tube 93 and moves it outward. The medium injection tube 93 stops after extending beyond the first inner molded column 24. S3, Injection of adhesive: e) The glue injection assembly 6 is simultaneously inserted into the output end of the outer protective tube 91 (inside the open end of the outer protective tube 91) and the output end of the media injection tube 93, leaving a closed glue injection cavity between the glue injection assembly 6 and the transfer mold 2; in specific implementation: The third drive rod 61 drives the sealing plug 62 to be embedded in the outer tube 21. The area between the sealing plate 632, the constraint plate 28, and the outer tube 21 is the glue injection cavity. The first glue injection head 633 extends into the glue injection cavity. The output end of the medium injection tube 93 passes through the reserved hole 6321. The second glue injection head 635 is inserted into the output end of the medium injection tube 93 and leaves a gap between it and the first inner post 24. The ends of the first inner post 24, the second inner post 25, the third inner post 26, and the fourth inner post 27 are all embedded in the groove of the sealing plate 632. f) The perforation mechanism opens a fifth injection hole 912 and a sixth injection hole 913 at the outer protective tube; and opens a first injection hole 931 and a second injection hole 932 at the output end of the medium injection tube; in specific implementation: When the seventh drive rod 81 drives the integrated plate 82 to move, the integrated plate 82 drives the top rod 84 and the second abutment block 83 to move synchronously. In this way, the second abutment block 83 abuts the first mating block 65 and moves inward, so that the first through pin 651 and the second through pin 652 pass through the outer protective tube 91 and the medium injection tube 93 to open the first injection hole 931, the second injection hole 932, the fifth injection hole 912 and the sixth injection hole 913. g) The glue injection assembly 6 simultaneously injects resin glue into the glue injection chamber and the output end of the medium injection pipe 93 to seal the output end of the medium injection pipe 93 and form a resin filling block 97. The resin filling block 97 is sealed inside the outer protective pipe 91. The medium injection pipe 93, pressure balance pipe 94, pressure reducing pipe 95 and nutrition pipe 96 all seal through the resin filling block 97. h) The resin filler block has a third injection hole 971 and a fourth injection hole 972 at the perforation mechanism; S4, Opening: i) The workers use a hand-held drilling device to drill out annular array of discharge holes 911 on the outer wall of the output end of the outer protective pipe 91; S5, Airbag Ring 92 Installation: j) The airbag ring installation assembly 7 seals the airbag ring 92 onto the outer wall of the outer protective tube 91; k) The first expansion portion of the airbag ring is fitted outside the fourth injection port, and the second expansion portion is fitted outside the fifth injection port. The purpose is to form an anti-reflux airbag inside the medium injection tube to prevent reflux of fluid in the patient's gastrointestinal tract; in specific implementation... The two ends of the airbag ring 92 are first fitted onto the reserved half-sleeve 7511. The fifth drive rod 731 retracts, causing the first middle plate 732 to move downward. The first middle plate 732 pushes the drive plates 735 at both ends outward. The drive plates 735 drive the first bidirectional spring rod 77 to move outward, thereby driving the first positioning ring 75 and the second positioning ring 76 to open longitudinally on both the left and right sides to expand the airbag ring 92. The fourth drive rod 71 drives the first positioning ring 75, the second positioning ring 76, and the expanded airbag sleeve 92 to move to the outside of the outer protective tube 91. The fourth drive rod 71 extends. At the same time, the sixth drive rod 741 pushes the second middle plate 742 upward. The second middle plate 742 drives the first abutment brackets at both ends to push the second mating block 7512 upward, thereby pushing the first positioning ring 75 and the second positioning ring 76 to separate axially, so that the airbag sleeve 92 retracts and fits onto the outer protective tube 91. Finally, the fixing part, the outer end of the first expansion part, and the outer end of the second expansion part of the airbag sleeve 92 are heat-sealed to the outside of the outer protective tube 91. S6. Cooling and solidification yields a multi-stage anti-reflux gastrointestinal tube.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0056] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-stage anti-reflux gastrointestinal tube extrusion molding equipment, characterized in that: include The components include the discharge mold, outer tube, inner column, cutting plate, release assembly, and glue injection assembly. The discharge mold has independent outer cavities and inner ring cavities inside; The outer tube body is corresponding to and externally disposed on the outer cavity for extruding and molding the outer protective tube of the gastrointestinal tube. An inner column corresponding to the inner ring cavity is fixed inside the outer tube body for extruding and molding the inner tube of the gastrointestinal tube. The cutting plate is fixed at the junction of the discharge mold and the outer tube to cut the formed gastrointestinal tube; The detachment assembly includes an outer suction ring, a spring rod, and a suction column, wherein... The outer suction ring is fixed to the outer edge of one end of the spring rod and is arranged correspondingly to the outer tube body; The suction column is fixed to the outer edge of the other end of the spring rod and is arranged correspondingly to the inner column; When the spring rod is compressed and the suction rod abuts against the inner molded column, the outer suction ring moves closer to the outer tube body; when the outer suction ring abuts against the outer tube body and stretches the spring rod, the outer tube body first undergoes displacement relative to the inner molded column, so that the outer protective tube and the inner tube are separated and there is a length difference between them in the axial length, and a cavity is left between the inner tube and the inner molded column to facilitate glue injection. The dispensing assembly includes a plug, a sealing plate, and a dispensing head assembly, wherein... The plug is corresponding to and externally installed on the outer tube body; The sealing plate is fixed to the outer end of the sealing plug. When the sealing plug is embedded in the outer tube, the sealing plate fits tightly against the inner cavity of the outer protective tube and forms an injection cavity with the inner cavity of the outer protective tube. The glue injection head assembly is fixed on the sealing plate and injects glue into the glue injection cavity and the cavity respectively.

2. The extrusion molding equipment according to claim 1, characterized in that: The dispensing assembly also includes a perforation mechanism, wherein... The perforation mechanism includes a side support plate, a through pin, a first mating block, and a second abutting block. The side support plate is fixed to the outer wall of the seal, and the outer end of the side support plate is vertically spaced through with through nails. The outer ends of the through pins are all connected to the first mating block; A spring is installed between the first mating block and the side support plate, and a second abutting block is provided on its outer side; The second abutting block presses down on the first mating block, causing the through pin to pass through the outer protective tube and the inner tube to open several injection holes.

3. The extrusion molding equipment according to claim 2, characterized in that: A push rod is integrally provided on the side of the second abutment block; a pull rod is movably connected to the push rod away from the connection point with the second abutment block; wherein... The tie rod is fixed to the closed end of the outer tube away from the outer cavity by the first fixing plate; The outer edge of the first fixed plate is connected to a turntable via a fixed connecting column, which is used to drive the outer tube body to circulate between the discharge mold, the release component and the glue injection component. One end of the inner column is vertically connected to the inner wall of the first fixing plate, and the other end of the inner column is vertically connected to a constraint plate. The constraint disc is fixedly installed at the opening end of the outer tube body near the outer cavity; When the push rod pushes the pull rod, the pull rod causes the outer tube and the constraint plate to slide outward as a whole. At this time, the area between the sealing plate, the constraint plate, and the outer tube is the glue injection cavity.

4. The extrusion molding equipment according to claim 3, characterized in that: Both the outer tube and the restraint disc have clearance grooves on their sides to avoid the through nails.

5. The extrusion molding equipment according to claim 1, characterized in that: The dispensing head assembly includes a first dispensing head and a second dispensing head, wherein... A first support tube is fixed inside the seal; a glue-filling head is provided at the output end of the first support tube; a second glue-filling head and a second support tube penetrating the seal plate are fixed on the outside of the glue-filling head; a first glue-filling head is fixed at the end of the second support tube; a reserved hole for the inner tube to pass through is provided on the seal plate; When the sealant is embedded in the outer tube, the first injection head extends into the injection cavity, and the inner tube passes through the pre-drilled hole; the second injection head is inserted into the cavity left between the inner tube and the inner molded column.

6. The extrusion molding equipment according to claim 1, characterized in that: It also includes an airbag ring mounting assembly, which comprises a side frame, a first positioning ring, a second positioning ring, a longitudinal opening and closing assembly, and an axial opening and closing assembly, wherein... The side frame is fixed to one side of the discharge mold, and a longitudinal opening and closing component is installed at the top and an axial opening and closing component is installed at the bottom. The first positioning ring and the second positioning ring are mirror images of each other. The middle parts of the first positioning ring and the second positioning ring are connected by a first bidirectional spring rod, the top of the first positioning ring and the top of the second positioning ring are connected by a second bidirectional spring rod, and the bottom of the first positioning ring and the bottom of the second positioning ring are connected by a third bidirectional spring rod. The output end of the longitudinal opening and closing component is connected to the first bidirectional spring rod, which drives the first positioning ring and the second positioning ring to open longitudinally so that the airbag ring is fitted onto the outer wall of the outer protective tube; The output end of the axial opening and closing component respectively abuts against the bottom of the first positioning ring and the second positioning ring; used to drive the first positioning ring and the second positioning ring to open axially, so that the airbag ring is fitted onto the outer protective tube.

7. The extrusion molding equipment according to claim 6, characterized in that: The first positioning ring is composed of a first half-ring and a second half-ring arranged in a mirror-symmetrical manner; The inner side of the first semi-ring is provided with a reserved half-sleeve, which is used as the positioning area for the airbag ring sleeve. The bottom inner wall of the second semi-ring is provided with a second mating block, which abuts against the axial opening and closing assembly.

8. The extrusion molding equipment according to claim 6, characterized in that: The airbag ring includes a first expansion portion, a fixing portion, and a second expansion portion, wherein... The fixing part is located between the first expansion part and the second expansion part; The fixing part, the outer end of the first expansion part, and the outer end of the second expansion part are all fixed to the outer protective tube; Both the first expansion section and the second expansion section are independently connected to the inner tube.

9. A manufacturing process for a multi-stage anti-reflux gastrointestinal tube, using the extrusion molding equipment as described in any one of claims 1 to 8, characterized in that: Includes the following steps: S1. Gastrointestinal tube shaping and transfer: Prepare transparent polyurethane material granules, and then use an extruder with an external discharge mold to injection mold out gastrointestinal tubes. The formed gastrointestinal tube enters the transfer mold, and after reaching the specified length, the cutting plate cuts the formed gastrointestinal tube. S2, gastrointestinal tract detachment: The outer suction ring and suction column respectively use negative pressure to attract the outer protective tube and the inner tube, so that the open end of the outer protective tube extends outward to the output end of the inner tube; S3, Injection of adhesive: The glue injection assembly is simultaneously inserted into the open end of the outer protective tube and into the inner tube. At the same time, a closed glue injection cavity is left between the glue injection assembly and the outer tube body, and a cavity is left between the inner tube and the inner molded column. The perforation mechanism has injection holes at the output ends of the outer protective tube and the inner tube, respectively. The glue injection assembly simultaneously injects resin into the glue injection chamber and the cavity to seal the inner tube output end and form a resin filling block. The resin filling block is sealed inside the outer protective tube, and the inner tube seal penetrates the resin filling block. The perforation mechanism continues to create another injection hole at the resin filler block; S4, Opening: Discharge holes arranged in a ring array are opened on the outer edge of the outer protective tube at the end away from the glue injection cavity; S5, Airbag Ring Installation: The airbag ring installation assembly seals the airbag ring onto the outer wall of the outer protective tube. The first and second expansion parts of the airbag ring are respectively fitted into the other injection hole to form an anti-reflux airbag inside the inner tube to block the reflux of liquid in the patient's gastrointestinal tract; S6. Cooling and solidification yields a multi-stage anti-reflux gastrointestinal tube.

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