CN111202684A - Nasogastric tube structure and machining die and machining method thereof - Google Patents
Nasogastric tube structure and machining die and machining method thereof Download PDFInfo
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- CN111202684A CN111202684A CN202010176578.8A CN202010176578A CN111202684A CN 111202684 A CN111202684 A CN 111202684A CN 202010176578 A CN202010176578 A CN 202010176578A CN 111202684 A CN111202684 A CN 111202684A
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- nasogastric tube
- tube structure
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J15/00—Feeding-tubes for therapeutic purposes
- A61J15/0003—Nasal or oral feeding-tubes, e.g. tube entering body through nose or mouth
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J15/00—Feeding-tubes for therapeutic purposes
- A61J15/0026—Parts, details or accessories for feeding-tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/304—Extrusion nozzles or dies specially adapted for bringing together components, e.g. melts within the die
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- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention belongs to the technical field of medical materials, and particularly relates to a nasogastric tube structure which comprises a catheter and a contrast line penetrating through the length direction of the catheter, wherein the contrast line is coated inside the catheter material. According to the invention, the material of the radiography line can be protected by the above mode, and the junction of the catheter and the material of the radiography line is arranged in the catheter, so that the erosion of the intestinal nutrient solution can be avoided, the cracking phenomenon of the nasogastric tube body is avoided, on one hand, the pain of a patient is reduced, and on the other hand, the working strength of medical personnel is effectively reduced. The invention also provides a mold for processing the nasogastric tube structure, which can realize the processing of the required nasogastric tube structure, has simple structure, and produces stable and reliable products.
Description
Technical Field
The invention belongs to the technical field of medical materials, and particularly relates to a nasogastric tube structure, a processing die and a processing method thereof.
Background
As shown in figure 1, the present clinical nasogastric tube radiography line 2 runs through the inner and outer walls of the catheter 1, the clinical nasogastric tube use time reaches 42 days, in the 42 days, after food and nutrient solution repeatedly pass through the nasogastric tube, the nasogastric tube running through the nasogastric tube structure is not completely coated by the polyurethane material of the tube body main body of the catheter 1 due to the fact that the material of the radiography line 2, under the repeated erosion of the intestinal nutrient solution, the nasogastric tube body is prone to cracking at the joint of the radiography line 2, and only the nasogastric tube can be replaced and the intubation can be conducted again under the condition.
Clinically, a doctor needs to spend a long time in the process of inserting the catheter, and particularly for a patient needing to insert the duodenum, the catheter is more difficult to penetrate through the pylorus; in addition, for a patient who needs nasal feeding for a long time, frequent catheter replacement causes pain to the patient, and the workload of medical staff is increased.
In view of the above circumstances, the inventor of the present invention has actively studied and innovated based on the practical experience and professional knowledge that are abundant for many years in engineering application of such products, and together with the application of the theory, to create a nasogastric tube structure, a processing mold and a processing method thereof, so as to make the nasogastric tube structure more practical.
Disclosure of Invention
The invention aims to provide a nasogastric tube structure, thereby effectively solving the problems in the background art. Meanwhile, the invention also provides a processing die and a processing method of the nasogastric tube structure, and the same technical effects are achieved.
In order to achieve the purpose, the invention adopts the technical scheme that:
a nasogastric tube structure comprises a catheter and a contrast line penetrating through the length direction of the catheter, wherein the contrast line covers the interior of a catheter material.
Further, a cross section of the contrast line perpendicular to the length direction has a rounded contour.
Further, the rounded profile has a first extending direction and a second extending direction perpendicular to each other, the second extending direction coincides with a radial direction of the conduit, and an extending length of the second extending direction is smaller than an extending length of the first extending direction.
Further, the rounded profile is symmetrically arranged with respect to the second extension direction.
Further, the midpoint of the line of symmetry of the rounded profile in the second direction of extension is located at a central position of the inner and outer walls of the conduit.
A processing mould of a nasogastric tube structure comprises a mould core base and a mould core;
the mold core base is provided with a first discharging channel, a first material from the first discharging channel is used for forming a catheter of the nasogastric tube structure, the mold core base further comprises a second discharging channel, a second material from the second discharging channel is used for forming a contrast line of the nasogastric tube structure, the first discharging channel and the second discharging channel are arranged on the periphery of the mold core, and a material outlet of the second discharging channel is arranged in the advancing range of the first material in the extruding process.
Furthermore, the mold core base is provided with a through annular hole site around the mold core for the first material circulation, the material outlet of the first discharging channel is located on one side of the annular hole site facing the mold core, and a plurality of connecting plates are uniformly distributed in the annular hole site around the axis of the mold core.
Furthermore, the end contour line of the mold core is coincided with the inner wall contour line of the annular hole site edge.
Further, the connecting plates are uniformly arranged in the radial direction of the mold core.
Further, the connecting plates are uniformly arranged in the axial direction of the mold core base in thickness.
Further, the connecting plate decreases in thickness in a radial direction of the core base towards the core.
Further, the reduction of the thickness of the connection plate is performed uniformly.
Furthermore, the mold core comprises a circular truncated cone section connected with the mold core base and a cylindrical section in smooth transition with the smaller diameter side of the circular truncated cone section, and the projection of the material outlet of the second discharging channel in the axial direction of the mold core is located in the projection range of the side wall of the circular truncated cone section.
Furthermore, the projection of the material outlet of the second discharging channel in the axial direction of the mold core is positioned at the center of the projection range of the circular truncated cone section.
Further, the second discharging channel penetrates through the mold core base, the connecting plate and the circular table section.
Further, the mold core also comprises a second circular table section arranged on the other side of the cylindrical section.
Further, the second discharge channel extends to the outside of the circular truncated cone section.
Further, the second discharging channel extends to the junction of the cylindrical section and the second circular table section.
Further, the material outlet section of the second discharging channel is circular.
Further, a through air passage is arranged inside the mold core, and the air passage is communicated with the inside of the guide pipe and the atmospheric environment.
Further, the air channel penetrates through the mold core base and the connecting plate.
Furthermore, the mold core base is provided with a through hole position on the inner side of the annular hole position, one side of the through hole position is connected with the outer wall of the mold core, the other side of the through hole position is provided with an air seal structure, and one part of the air passage is communicated with the inside of the through hole position and the atmospheric environment.
Furthermore, an annular groove is formed in the end face, attached to the mold core, of the mold core base, and the annular groove is a part of the second discharge channel.
A method for processing a nasogastric tube structure comprises the following steps:
s1: supplying a material I for molding a catheter of a nasogastric tube in a ring shape;
s2: and continuously injecting a second material for forming the radiography line of the nasogastric tube into the first material along the direction of the catheter axis from a set position in the advancing process of the first material in which the first material is extruded, wherein the flow rates of the first material and the second material are equal.
Further, the discharge hole of the second material is positioned in the middle of the annular inner circle and the annular outer circle.
Further, during processing, the interior of the conduit is in communication with the atmosphere.
Through the technical scheme, the invention has the beneficial effects that:
according to the invention, the material of the radiography line can be protected by the above mode, and the junction of the catheter and the material of the radiography line is arranged in the catheter, so that the erosion of the intestinal nutrient solution can be avoided, the cracking phenomenon of the nasogastric tube body is avoided, on one hand, the pain of a patient is reduced, and on the other hand, the working strength of medical personnel is effectively reduced. The invention also provides a mold for processing the nasogastric tube structure, which can realize the processing of the required nasogastric tube structure, has simple structure, and produces stable and reliable products.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a cross-sectional view of a prior art nasogastric tube structure of the background art;
FIG. 2 is a cross-sectional view of the nasogastric tube structure of the present invention;
FIG. 3 is a schematic cross-sectional view of a hatching line;
FIG. 4 is another schematic cross-sectional view of a hatch;
FIG. 5 is a schematic view of a mold core base;
FIG. 6 is a schematic view of the connection between the mold core base and the mold core shown in FIG. 5;
FIG. 7 is an enlarged view of the mold core of FIG. 6;
FIG. 8 is a cross-sectional view of FIG. 6;
FIG. 9 is a schematic view of the mold core of FIG. 6 after optimization;
FIG. 10 is a schematic illustration of the second tapping channel of FIG. 9 after optimization;
FIG. 11 is an enlarged view of the mold core of FIG. 10;
FIG. 12 is an enlarged view of a portion of FIG. 11 at A;
FIG. 13 is a schematic view of an optimized structure of a mold core base;
FIG. 14 is an enlarged view of a portion of FIG. 13 at B;
FIG. 15 is a schematic view of the installation of the gas seal arrangement;
reference numerals: the device comprises a guide pipe 1, a contrast line 2, a first extending direction A, a second extending direction B, a mold core base 3, a first discharging channel 31, a second discharging channel 32, a connecting plate 33, a through hole site 34, an annular groove 35, a mold core 4, a circular truncated cone section 41, a cylindrical section 42, a second circular truncated cone section 43, an end contour line 44, an air passage 45 and an air seal structure 5.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
This embodiment is written in a progressive manner.
As shown in fig. 2, the nasogastric tube structure comprises a catheter 1 and a contrast line 2 penetrating through the length direction of the catheter, wherein the contrast line 2 is coated inside the material of the catheter 1. Can protect the material of radiography line 2 through above-mentioned mode, the juncture of pipe 1 and the 2 materials of radiography line sets up inside pipe 1, can avoid the erosion of intestines nutrient solution to avoid the fracture phenomenon of nasogastric tube shaft, reduced patient's misery on the one hand, on the other hand has also effectively reduced medical personnel's working strength.
The cross section of the radiography line 2 perpendicular to the length direction is provided with a smooth contour, the smooth contour form enables the transition of the two materials of the catheter 1 and the radiography line 2 to be softer, and the affinity of the two materials can be increased by the mode, so that the service life of the nasogastric tube is further prolonged; meanwhile, the smooth profile is easier to control in the forming process, so that the processing process can be simplified.
As a preference of the above embodiment, as shown in fig. 3 and 4, the rounded contour has a first extending direction a and a second extending direction B perpendicular to each other, the second extending direction B coinciding with a radial direction of the catheter 1, the second extending direction B having an extension length smaller than that of the first extending direction a. In the process of using, the radiography line 2 is used for observing the position of the nasogastric tube, and under the condition that the size of the catheter 1 is fixed, the radiography line 2 with larger extension area is more helpful for observation, therefore, when the thickness of the catheter 1 is fixed, the radiography line 2 is preferably extended along the first extension direction A perpendicular to the radial direction as much as possible, thereby reducing the difficulty of judging the position of the nasogastric tube and increasing the accuracy of the judgment.
Wherein, in order to reduce the processing degree of difficulty of nasogastric tube structure, the rounding off profile sets up about second extending direction B symmetry, and this kind of structural style can effectually reduce the processing degree of difficulty of making shadow line 2. The middle point of the symmetrical line of the smooth contour in the second extending direction B is positioned at the central position between the inner wall and the outer wall of the catheter 1, so that the material thickness of the catheter 1 inside and outside the radiography line 2 is ensured to be more balanced, and the stability of the nasogastric tube structure is improved.
In fig. 3, a form is shown in which the rounded contour is also symmetrically arranged with respect to the first extending direction a, which is difficult to be ensured in the actual production process, and in order to reduce the processing difficulty, a form in which the circular contour in fig. 4 is not symmetrical with respect to the first extending direction a may be adopted in the present invention, and in this form, it is preferable that the extending direction is curved in conformity with the circular contour of the guide tube 1.
A processing mould of a nasogastric tube structure comprises a mould core base 3 and a mould core 4; the mold core base 3 is provided with a first discharge channel 31, a first material from the first discharge channel 31 is used for molding the catheter 1 of the nasogastric tube structure, the mold core base 3 further comprises a second discharge channel 32, a second material from the second discharge channel 32 is used for molding the radiography line 2 of the nasogastric tube structure, the first discharge channel 31 and the second discharge channel 32 are both arranged on the periphery of the mold core 4, and a material outlet of the second discharge channel 32 is arranged in the advancing range of the first material in the extruding process.
The mold for processing the nasogastric tube structure in the embodiment provides the first material and the second material through the first discharging channel 31 and the second discharging channel 32 respectively, so that the catheter 1 and the radiography line 2 can obtain a clear interface, and meanwhile, the two materials form an integrated structure through synchronous discharging in the molding process, so that the stability of the structure can be further improved, and the service life is prolonged.
As shown in fig. 5, a structural form of the mold core base 3 is shown, specifically, a through annular hole is provided on the mold core base 3 around the mold core 4 for first material circulation, a material outlet of the first discharging channel 31 is located on one side of the annular hole facing the mold core 4, and a plurality of connecting plates 33 are uniformly distributed in the annular hole around the axis of the mold core 4. One end of the annular hole site is used for feeding a material I, the other end of the annular hole site is used for feeding the material I to flow out, wherein the extruded material I extends out annularly under the limitation of the annular hole site and the mold core 4, the connecting plate 33 is used for connecting the inside and the outside of the annular hole site, and the stirring of the material I can be realized in the process of extruding the material I, so that the material I is extruded more uniformly, and the material I is not shaped after flowing out from the annular hole site, therefore, gaps among the materials caused by the connecting plate 33 can be filled rapidly, and a complete annular conduit 1 is formed, the thickness of the wall of the conduit 1 is related to the width of the annular hole site, and the inner diameter of the conduit 1 is related to the outer diameter of the mold.
As shown in fig. 6, the end contour 44 of the mold core 4 coincides with the inner wall contour of the annular hole site edge. Through the optimization of the structure, the inner wall of the conduit 1 is designed to be smoother, and after the material first flows out from the material outlet of the first discharging channel 31, the smooth transition is realized through the butt joint of the edges, so that the final forming cannot be influenced by the sudden change of the flow cross section.
In the course of processing, because connecting plate 33 can cause the hindrance to the circulation of material one, in order to resume even annular state after the material can be quick after connecting plate 33, connecting plate 33 is the even setting of thickness in the radial direction of mold core 4.
As a preference of the above embodiment, the connecting plate 33 is provided with a uniform thickness in the axial direction of the core base 3, which is convenient for processing, but in order to improve the uniformity of the material of the guide tube 1, the thickness of the connecting plate 33 is reduced in the radial direction of the core base 3 toward the core 4, so that the material can gradually return to a uniform state as it passes through the connecting plate 33, although in this form, the reduction of the thickness of the connecting plate 33 is uniformly performed, which is a more preferred state.
Preferably, the mold core 4 comprises a circular truncated cone section 41 connected with the mold core base 3 and a cylindrical section 42 smoothly transited from the smaller diameter side of the circular truncated cone section 41, and the projection of the material outlet of the second discharging channel 32 in the axial direction of the mold core 4 is located in the projection range of the side wall of the circular truncated cone section 41.
As shown in fig. 6 and 7, by the arrangement of the circular table segment 41, the first material can be guided after flowing out from the annular hole, and the material can retract to a certain extent in the guiding process, so that the dimensional stability of the formed catheter 1 can be ensured, in the process, the second material from the material outlet of the second material outlet channel 32 is injected into the preliminarily formed annular body, the second material and the first material are extruded together to form the imaging line 2 in the catheter 1, and the two materials are formed together, so that the stability of the final product can be effectively ensured.
Preferably, the projection of the material outlet of the second discharging channel 32 in the axial direction of the mold core 4 is located at the center of the projection range of the circular table section 41, so that the material thickness of the catheter 1 inside and outside the imaging line 2 is ensured to be relatively balanced, and the stability of the nasogastric tube structure is improved.
As a preference of the above embodiment, as shown in fig. 8, the second discharge channel 32 penetrates the core base 3, the connecting plate 33 and the circular table section 41 so as to be provided separately from the first discharge channel 31, facilitating the separate supply of the first material and the second material.
In the processing process, the cylindrical section 42 can realize the sizing of the size of the conduit 1, the conduit 1 passing through the section forms an inner contour with the same size as the outer wall of the conduit 1, in order to reduce the friction force in the extrusion process of the conduit 1, as shown in fig. 9, the mold core 4 further comprises a second circular truncated cone section 43 arranged on the other side of the cylindrical section 42, the mold core 4 is separated from the inner wall of the conduit 1 through the gradual contraction of the second circular truncated cone section 43, and the time for the conduit 1 to be subjected to the friction force is shortened to ensure smoother processing.
As a preference of the above embodiment, the second discharging channel 32 extends to the outside of the circular truncated cone section 41, so that during the first forming process of the catheter 1, the space for arranging the hatching line 2 can be obtained inside by the support of the second discharging channel 32 inside, and the space can be stabilized within a distance, so that the space can be filled more effectively and the shape can be stabilized after the material second flows out from the second discharging channel 32. Wherein the second outlet channel 32 preferably extends to the intersection of the cylindrical section 42 and the second circular truncated cone section 43, as shown in fig. 10. When the guide pipe 1 is separated from the mold core 4, due to the fact that internal support is lost, a certain shrinkage trend is inevitably existed, a second material is injected when the shrinkage trend is obtained, the second material can be quickly and stably wrapped in the first material in the process of retraction of the material of the guide pipe 1, and the interface between the first material and the second material is connected more stably.
The material outlet cross-section of the second outlet channel 32 is circular. The section shape is easier to process, when the guide pipe 1 loses internal support, the cylindrical space supported by the second discharge channel 32 is compressed by the material to form an approximate ellipse due to retraction of the material, so that the second material is extruded and extended to obtain a larger observation area, and the second material is better connected through extrusion of the second material.
As shown in fig. 11 and 12, a through air passage 45 is provided inside the mold core 4, and the air passage 45 communicates the inside of the catheter 1 with the atmosphere. Through with the inside and atmospheric environment UNICOM of pipe 1, can avoid the inside flat of causing because of pressure is not enough of pipe 1 to guarantee the shaping effect. Air flue 45 runs through mold core base 3 and connecting plate 33, and is same, and the influence that whole air flue caused first discharging channel 31 and second discharging channel 32 can equally be avoided to this kind of mode of setting, reduces the processing degree of difficulty.
As shown in fig. 13 to 15, preferably, a through hole 34 is disposed on the mold core base 3 at the inner side of the annular hole, one side of the through hole 34 is connected to the outer wall of the mold core 4, the other side of the through hole 34 is provided with an air seal structure 5, and a part of the air passage 45 is communicated with the inside of the through hole 34 and the atmosphere.
During installation, the mold core 4 and the through hole 34 can be connected by threads, and similarly, the air seal structure 5 can also be installed in this way, and other connection modes such as an interference fit extrusion mode and the like are also within the protection scope of the present invention. The gas seal structure 5 can be used for providing a fixed position for the processing mold and also can be used for facilitating the cleaning of the whole processing mold after the gas seal structure is removed. An air duct 45 for ensuring the air pressure in the inner wall of the duct 1 communicates with the through hole site 34 and the atmosphere and can communicate with the inside of the duct 1 through a through passage in the inside of the mold core 4.
Preferably, as for the above embodiment, an annular groove 35 is provided on the end surface of the mold core base 3, which is attached to the mold core 4, and the annular groove 35 is a part of the second discharging channel 32. Through the setting of annular groove 35, can regard as the transfer space of mold core base 3 and the inside material two of mold core 4, can guarantee through its setting that many feed passage all can follow annular groove 35 and obtain the supply of material two when setting up many production lines 2, and the pan feeding mouth of annular groove 35 then can select in a flexible way.
A method for processing a nasogastric tube structure comprises the following steps:
s1: supplying a first material for molding a catheter 1 of a nasogastric tube in a ring shape;
s2: and starting from the set position of the extruded material I in the advancing process, continuously injecting a material II for forming the nasogastric tube radiography line 2 in the material I along the axial direction of the catheter 1, wherein the flow rates of the material I and the material II are equal.
And the discharge hole of the second material is positioned in the middle between the annular inner circle and the annular outer circle. During the process, the interior of the conduit 1 is in communication with the atmosphere.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A nasogastric tube structure comprises a catheter (1) and an imaging line (2) penetrating through the length direction of the catheter, and is characterized in that the imaging line (2) is covered inside the material of the catheter (1).
2. A processing mould of a nasogastric tube structure is characterized by comprising a mould core base (3) and a mould core (4);
the mold core base (3) is provided with a first discharging channel (31), a first material from the first discharging channel (31) is used for forming a catheter (1) of a nasogastric tube structure, the mold core base (3) further comprises a second discharging channel (32), a second material from the second discharging channel (32) is used for forming a contrast line (2) of the nasogastric tube structure, the first discharging channel (31) and the second discharging channel (32) are arranged on the periphery of the mold core (4), and a material outlet of the second discharging channel (32) is arranged in the advancing range of the first material in the extruding process.
3. The processing mold of the nasogastric tube structure according to claim 2, wherein a through annular hole is provided on the mold core base (3) around the mold core (4) for the first material to circulate, the material outlet of the first discharging channel (31) is located at one side of the annular hole facing the mold core (4), and a plurality of connecting plates (33) are uniformly distributed in the annular hole around the axis of the mold core (4).
4. The mold for manufacturing nasogastric tube structures according to claim 3, wherein the end contour (44) of the mold core (4) coincides with the inner wall contour of the annular hole site edge.
5. The mold for processing the nasogastric tube structure according to any one of claims 2 to 4, wherein the mold core (4) comprises a circular truncated cone section (41) connected with the mold core base (3) and a cylindrical section (42) smoothly transited from the smaller diameter side of the circular truncated cone section (41), and the projection of the material outlet of the second material outlet channel (32) in the axial direction of the mold core (4) is located in the projection range of the side wall of the circular truncated cone section (41).
6. Machining die of nasogastric tube structure according to claim 5, characterized in that said second outfeed channel (32) extends outside said circular bench section (41).
7. The mold for processing the nasogastric tube structure according to claim 3, wherein the mold core (4) is internally provided with a through air passage (45), and the air passage (45) is communicated with the inside of the conduit (1) and the atmosphere.
8. The mold for processing the nasogastric tube structure according to claim 7, wherein a through hole (34) is formed in the mold core base (3) and located inside the annular hole, one side of the through hole (34) is connected with the outer wall of the mold core (4), an air seal structure (5) is arranged on the other side of the through hole (34), and a part of the air passage (45) is communicated with the inside of the through hole (34) and the atmosphere.
9. The processing mold for the nasogastric tube structure according to any one of claims 2 to 4, 7 and 8, wherein an annular groove (35) is provided on the end surface of the mold core base (3) attached to the mold core (4), and the annular groove (35) is a part of the second discharging channel (32).
10. A method for processing a nasogastric tube structure is characterized by comprising the following steps:
s1: supplying a first material for molding a catheter (1) of a nasogastric tube in a ring shape;
s2: and starting from a set position in the advancing process of the first material extruded, continuously injecting a second material for forming the nasogastric tube by the aid of the first material along the axial direction of the catheter (1), wherein the flow rates of the first material and the second material are equal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010176578.8A CN111202684B (en) | 2020-03-13 | 2020-03-13 | Machining die and machining method for nasogastric tube structure |
| PCT/CN2020/094544 WO2021179450A1 (en) | 2020-03-13 | 2020-06-05 | Nasogastric tube structure, and machining mold and machining method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010176578.8A CN111202684B (en) | 2020-03-13 | 2020-03-13 | Machining die and machining method for nasogastric tube structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111202684A true CN111202684A (en) | 2020-05-29 |
| CN111202684B CN111202684B (en) | 2021-03-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021179450A1 (en) * | 2020-03-13 | 2021-09-16 | 江苏苏云医疗器材有限公司 | Nasogastric tube structure, and machining mold and machining method therefor |
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| CN117818009A (en) * | 2024-02-22 | 2024-04-05 | 江门市蓬江区义海新材料有限公司 | PE pipe processing die based on port structure convenient to detach |
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| WO2021179450A1 (en) | 2021-09-16 |
| CN111202684B (en) | 2021-03-12 |
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