NOL ring preparation mold, device and method

Abstract

The invention discloses an NOL ring preparation mold, device and method, the mold comprises a core shaft and a barrel body, at least two second joint pieces are arranged on the periphery of the core shaft, and the second joint pieces are distributed in the circumferential direction of the core shaft; the cylinder body is coaxially arranged on the periphery of the core shaft in a sleeving mode, the cylinder body comprises at least two split bodies with arc-shaped cross sections, the split bodies are sequentially distributed in the circumferential direction of the core shaft to form the cylinder body of the combined component, and first joint pieces corresponding to the second joint pieces are arranged on the inner sides, facing the core shaft, of the split bodies; the second joint piece and the first joint piece are detachably connected in an inserted mode in the axial direction of the core shaft, through the split type structure of the barrel body and the detachable insertion connection between the split bodies and the core shaft, after curing is completed, the split bodies can be separated from the core shaft one by one in the axial direction of the core shaft, the interaction force between the NOL ring and a mold is reduced, and the mold quality is improved. The NOL ring is prevented from being damaged in the demolding process, demolding of the NOL ring is facilitated, and the demolding success rate is increased. The method is suitable for the field of composite material winding forming.

Description

Technical Field

[0001] The present invention relates to the technical field of composite material winding molding, and specifically relates to a NOL ring preparation mold, device and method. Background Art

[0002] The winding layer design of the type-IV hydrogen storage cylinder is related to the stability and reliability of the type-IV hydrogen storage cylinder. The performance test of the winding layer is of great significance. However, verifying the winding layer design through the overall test of the type-IV hydrogen storage cylinder will consume a large amount of manpower, material and financial resources, and it is not easy to obtain reliable rules.

[0003] Therefore, generally, a large amount of data is accumulated through the macroscopic test of the composite material NOL ring, and then the relevant performance of the corresponding winding layer of the type-IV hydrogen storage cylinder is inferred. As an important test method in the field of composite materials, the NOL ring test is applicable to the performance test of all composite material rotating body components including the type-IV hydrogen storage cylinder.

[0004] Before the NOL ring test, a mold release agent or mold release wax needs to be applied to the corresponding mold, and then winding, curing, demolding and cutting are carried out to finally obtain the NOL ring specimen. However, during the winding and curing processes, due to factors such as fiber winding tension, resin curing shrinkage and resin chemical adhesion force, the interaction force between the winding layer and the mold is relatively large, and it is impossible to easily achieve demolding. Demolding by means of violent knocking often causes great damage to the NOL, resulting in inaccurate data; the help of reducing the mold diameter for demolding is limited, and it will affect the size of the NOL ring, which also has a great impact on the final result. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a NOL ring preparation mold, device and method, which solve the problem that the interaction force between the winding layer and the mold is relatively large and it is impossible to easily achieve demolding.

[0006] A NOL ring preparation mold according to the first aspect of the embodiments of the present invention includes: A mandrel, with at least two second engaging members provided on the outer periphery, and at least two of the second engaging members are circumferentially distributed along the mandrel; A barrel body, coaxially sleeved on the outer periphery of the mandrel. The barrel body includes at least two segments with a circular arc-shaped cross-section. At least two of the segments are sequentially distributed along the circumference of the mandrel to form the barrel body as a combined component. At least two of the segments are provided with first engaging members corresponding to the second engaging members on the inner side facing the mandrel. At least two of the second engaging members and at least two of the first engaging members are detachably inserted along the axial direction of the mandrel.

[0007] A mold for preparing an NOL ring according to an embodiment of the present invention has at least the following beneficial effects: In the present invention, at least two split bodies are detachably inserted into the mandrel. When winding the yarn, at least two split bodies enclose to form a smooth-surfaced barrel for winding the NOL ring, providing a mold with appropriate dimensions for the yarn winding. After curing, at least two split bodies and the mandrel can slide relative to each other in the first direction and then separate. By detaching at least two split bodies from the mandrel one by one, the interaction force between the barrel and the winding layer is reduced, facilitating the demolding of the NOL ring, avoiding damage to the NOL ring during the demolding process, and improving the demolding success rate.

[0008] According to some embodiments of the present invention, the first engaging member includes a first groove extending along the axial direction of the mandrel, and the second engaging member includes a first boss extending along the axial direction of the mandrel. The first groove and the first boss are detachably inserted along the axial direction of the mandrel.

[0009] According to some embodiments of the present invention, first connecting portions and second connecting portions are respectively provided on the opposite sides of adjacent two split bodies. The first connecting portion and the second connecting portion are detachably inserted along the axial direction of the mandrel.

[0010] According to some embodiments of the present invention, the first connecting portion includes a second groove extending along the axial direction of the mandrel, and the second connecting portion includes a second boss extending along the axial direction of the mandrel. The second groove and the second boss are detachably inserted along the axial direction of the mandrel.

[0011] According to some embodiments of the present invention, the mandrel is provided with a connecting rod, the connecting rod is coaxially arranged at the central position of the mandrel, and both ends of the connecting rod extend out of the mandrel.

[0012] According to some embodiments of the present invention, retaining plates are respectively sleeved on both ends of the connecting rod, and the retaining plates are movably adjustable along the axial direction of the connecting rod so that the retaining plates abut against the ends of the barrel.

[0013] According to some embodiments of the present invention, threaded sections are provided at both ends of the connecting rod, and threaded holes matching the threaded sections are provided through the centers of the retaining plates.

[0014] According to some embodiments of the present invention, the mold for preparing the NOL ring further includes an induction assembly, the induction assembly includes a generator and a receiver, the generator and the receiver are respectively installed on the two retaining plates, the generator and the receiver are arranged opposite to each other along the axial direction of the connecting rod, and the generator and the receiver are respectively adjustable along the radial direction of the connecting rod so that the generator and the receiver are located outside the barrel.

[0015] A device for preparing an NOL ring according to the second aspect of the embodiment of the present invention includes: The NOL ring preparation mold according to any one of claims 1 to 8; A wire feeding module and a winding machine, the wire feeding module is provided with a nozzle located outside the cylinder body, the winding machine is provided with a clamping tooling and a winding driving mechanism, the clamping tooling is connected to both ends of the mandrel, and the winding driving mechanism is used to drive the NOL ring preparation mold to move along the axial direction of the mandrel and rotate around the axis of the mandrel.

[0016] A method for preparing an NOL ring according to the third aspect of the embodiments of the present invention, the method comprising: Assembling the NOL ring preparation mold and laying an anti-sticking diaphragm on the outer circumference of the cylinder body; Installing the NOL ring preparation mold on the winding machine; Controlling the NOL ring preparation mold to move along the axial direction of the mandrel and rotate around the axis of the mandrel according to a preset winding thickness, so that the yarn output by the wire feeding module is wound around the outer peripheral wall of the cylinder body to form a winding part; Curing the winding part to form a composite material cylinder; Separating at least two of the split parts from the mandrel axially one by one to take out the composite material cylinder; Dividing the composite material cylinder to obtain NOL ring specimens.

[0017] Other features and advantages of the present invention will be described in the subsequent description, and, in part, will be obvious from the description, or will be understood by implementing the present invention. Description of the Drawings

[0018] The following further describes the present invention with reference to the drawings and embodiments, wherein: Figure 1 A cross-sectional view of one embodiment of an NOL ring preparation mold provided by the present invention; Figure 2 A cross-sectional view of the mandrel of one embodiment of an NOL ring preparation mold provided by the present invention; Figure 3 A cross-sectional view of one embodiment of a split part of an NOL ring preparation mold provided by the present invention; Figure 4 A side view of one embodiment of an NOL ring preparation mold provided by the present invention; Figure 5 A structural diagram of one embodiment of an NOL ring preparation device provided by the present invention; Figure 6 A flowchart of one embodiment of a method for preparing an NOL ring provided by the present invention; Attached drawing reference numerals: Mandrel 100; first engaging member 110; connecting rod 120; threaded section 121; retaining piece 130; threaded hole 131; sensing assembly 140; generator 141; receiver 142; Barrel body 200; split body 210; second engaging member 211; first connecting portion 212; second connecting portion 213; Wire feeding module 300; nozzle 310; guide roller 320; yarn reel mounting seat 330; clamping tooling 340; Yarn 400; winding portion 410. Detailed implementation manners

[0019] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0020] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up and down, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0021] In the description of the present invention, "a plurality of" means more than two. If the first and the second are described only for the purpose of distinguishing technical features, it should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0022] In the description of the present invention, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0023] The technical solutions of the present invention will be described clearly and completely below with reference to the drawings. Obviously, the following described embodiments are part of the embodiments of the present invention, not all embodiments.

[0024] The winding layer design of the type-IV hydrogen storage cylinder is related to the stability and reliability of the type-IV hydrogen storage cylinder. The performance test of the winding layer is of great significance. However, verifying the winding layer design through the overall test of the type-IV hydrogen storage cylinder will consume a large amount of manpower, material resources and financial resources, and it is not easy to obtain reliable rules.

[0025] Therefore, a large amount of data is generally accumulated through the macroscopic testing of composite material NOL rings, and then the relevant properties of the winding layer of the corresponding type-IV hydrogen storage cylinder are inferred. As an important testing method in the field of composite materials, the NOL ring test is applicable to the performance testing of all composite material rotating body components, including type-IV hydrogen storage cylinders.

[0026] Before conducting the NOL ring test, a release agent or release wax needs to be applied to the corresponding mold, and then winding, curing, demolding, and cutting are carried out to finally obtain the NOL ring specimen. However, during the winding and curing processes, due to factors such as fiber winding tension, resin curing shrinkage, and resin chemical adhesion force, the interaction force between the winding layer and the mold is relatively large, making it difficult to achieve demolding easily. Demolding by means of violent knocking often causes significant damage to the NOL, resulting in inaccurate data; the method of reducing the mold diameter has limited help for demolding and will affect the size of the NOL ring, also having a greater impact on the final result. To solve the above problems, the present invention provides a NOL ring preparation mold, device, and method, which can effectively solve the problem of the relatively large interaction force between the winding layer and the mold and the difficulty in achieving demolding easily.

[0027] Reference Figures 1 to 6 The following embodiments are made for a NOL ring preparation mold, device, and method of the present invention: Referring to Figure 1 、 Figure 2 and Figure 3 As shown, the NOL ring preparation mold of the embodiment of the present invention includes a mandrel 100 and a barrel body 200.

[0028] Among them, at least two first engaging members 110 are provided on the outer periphery of the mandrel 100, and at least two first engaging members 110 are circumferentially distributed along the mandrel 100.

[0029] The barrel body 200 is coaxially sleeved on the outer periphery of the mandrel 100. The barrel body 200 includes at least two split bodies 210 with a circular arc-shaped cross-section. At least two split bodies 210 are sequentially distributed along the circumference of the mandrel 100 to form the barrel body 200 as a combined component. At least two second engaging members 211 corresponding to the first engaging members 110 are provided on the inner side of at least two split bodies 210 facing the mandrel 100, and at least two second engaging members 211 and at least two first engaging members 110 are detachably inserted axially along the mandrel 100.

[0030] Through the detachable axial insertion of at least two second engaging members 211 and at least two first engaging members 110 along the mandrel 100, at least two split bodies 210 are inserted on the mandrel 100, and at least two split bodies 210 are enclosed to form a barrel body 200 with a smooth surface and a cylindrical structure, which is used as a mold for winding a composite material yarn 400 to form a winding layer.

[0031] Refer to Figure 1 、 Figure 2 and Figure 3 As shown, in this embodiment, there are two split parts 210. The cross-section of the split part 210 is semi-circular. After the two split parts 210 are correspondingly connected, a barrel body 200 with a cylindrical structure is formed. The surface of the barrel body 200 should be treated to ensure strength while also performing anti-corrosion and anti-scratch treatments.

[0032] Regarding the structures of the first engaging part 110 and the second engaging part 211: The first engaging part 110 includes a first groove extending along the axial direction of the core shaft 100, and the second engaging part 211 includes a first boss extending along the axial direction of the core shaft 100. The first groove and the first boss are mutually engaged. Since the bottom end of the first groove extends laterally to both sides, and the top end of the first boss extends laterally to both sides, the cross-sections of the first groove and the first boss are both T-shaped, thereby restricting the movement of the split part 210 relative to the core shaft 100 in the circumferential and radial directions of the core shaft 100, while satisfying the constraints of two degrees of freedom in the directions, and realizing the fixed installation of the split part 210 on the core shaft 100.

[0033] In some other embodiments, the first engaging part 110 and the second engaging part 211 can be of other shapes or structures. For example, the first engaging part 110 is a slider, and the second engaging part 211 is a track matching the first engaging part 110, as long as the first engaging part 110 and the second engaging part 211 can be detachably inserted along the axial direction of the core shaft 100.

[0034] Refer to Figure 1 and Figure 3 As shown, in order to accurately align and fit between two adjacent split parts 210, the opposite side edges of two adjacent split parts 210 are respectively provided with a first connecting part 212 and a second connecting part 213. The first connecting part 212 and the second connecting part 213 can be detachably inserted along the axial direction of the core shaft 100. In this embodiment, the first connecting part 212 includes a second groove extending along the axial direction of the core shaft 100, and the second connecting part 213 includes a second boss extending along the axial direction of the core shaft 100. The cross-sections of the second groove and the second boss are both rectangular, and the second groove and the second boss are mutually engaged to restrict the relative movement between the two split parts 210 in the radial direction of the core shaft 100, thereby facilitating the corresponding fitting between two adjacent split parts 210 and playing a positioning role.

[0035] In some other embodiments, the first connecting part 212 and the second connecting part 213 can be of other shapes or structures. For example, the first connecting part 212 includes a second groove with a triangular cross-section, and the second connecting part 213 includes a second boss matching the second groove, as long as the first connecting part 212 and the second connecting part 213 can be detachably inserted along the axial direction of the core shaft 100.

[0036] Preferably, for the mating surfaces between the first engaging member 110 and the second engaging member 211, and between the first connecting portion 212 and the second connecting portion 213, a friction-reducing mechanism such as balls can be provided to reduce the friction and interference between the split parts 210 and between the split parts 210 and the mandrel 100, facilitating the insertion and detachment of the split parts 210 from the mandrel 100.

[0037] Furthermore, to facilitate the fixation of the overall NOL ring preparation mold, referring to Figure 4 as shown, the mandrel 100 is provided with a connecting rod 120. Specifically, the connecting rod 120 is coaxially arranged at the central position of the mandrel 100, and both ends of the connecting rod 120 extend out of the mandrel 100. By fixing both ends of the connecting rod 120, the overall NOL ring preparation mold can be fixedly installed, while not affecting the winding of the yarn 400 around the outer peripheral wall surface of the cylinder body 200. Among them, the connecting rod 120 can be integrally formed with the mandrel 100 or slidably sleeved inside the mandrel 100.

[0038] Furthermore, to limit the position of the cylinder body 200 relative to the connecting rod 120, retaining plates 130 are respectively sleeved at both ends of the connecting rod 120. The retaining plates 130 are arranged to be axially movable and adjustable along the connecting rod 120, so that the retaining plates 130 are in contact with the ends of the cylinder body 200, thereby fixing the position of the cylinder body 200 relative to the connecting rod 120 along the axial direction of the connecting rod 120, and at the same time playing a protective role for the complex structures at the ends of the cylinder body 200 and the mandrel 100. To enable the retaining plates 130 to cover the ends of the cylinder body 200 and the mandrel 100, the diameter of the retaining plates 130 should be greater than the diameter of the cylinder body 200.

[0039] Specifically, in this embodiment, threaded segments 121 are respectively provided at both ends of the connecting rod 120, and threaded holes 131 matching the threaded segments 121 are provided through the centers of the retaining plates 130. The position of the retaining plates 130 on the connecting rod 120 is adjusted by rotating through the cooperation of the threaded holes 131 and the threaded segments 121.

[0040] Furthermore, to detect whether the winding thickness of the yarn 400 on the outer peripheral wall of the cylinder body 200 meets the thickness requirements of the NOL ring, the NOL ring preparation mold of this embodiment further includes an induction component 140. The induction component 140 includes a generator 141 and a receiver 142. The generator 141 and the receiver 142 are respectively installed on two retaining plates 130. The generator 141 and the receiver 142 are arranged opposite to each other along the axial direction of the connecting rod 120. The receiver 142 is used to receive the signal transmitted by the generator 141. When the thickness of the winding part 410 reaches the winding part 410 blocking between the receiver 142 and the generator 141, the signal transmitted by the generator 141 is interfered, and the signal received by the receiver 142 changes, thereby realizing the detection of the thickness of the winding part 410.

[0041] In this embodiment, the generator 141 is a laser generator 141, and the receiver 142 is a laser receiver 142. In some other embodiments, the sensing component 140 may be in other forms, such as an infrared sensing device, etc.

[0042] The generator 141 and the receiver 142 are respectively adjustable along the radial direction of the connecting rod 120. On the one hand, it ensures that the generator 141 and the receiver 142 are located outside the barrel body 200 to sense the winding part 410. On the other hand, the positions of the generator 141 and the receiver 142 are adjusted according to the thickness of the NOL ring, so as to adapt and match the requirements of different NOL ring thicknesses.

[0043] An embodiment of the present invention also provides an NOL ring manufacturing device. Refer to Figure 5 As shown, the device includes the above-mentioned NOL ring manufacturing mold, the wire feeding module 300 and the winding machine.

[0044] Among them, the wire feeding module 300 is used to continuously output the composite material yarn 400. The wire feeding module 300 includes a nozzle 310, a guide roller 320 and a yarn roll mounting seat 330. The yarn roll mounting seat 330 is used to mount the yarn roll. The guide roller 320 is used to guide the yarn 400 drawn from the yarn roll. The nozzle 310 is located outside the barrel body 200 and is used to output the yarn 400 to the outer peripheral wall of the barrel body 200.

[0045] The winding machine is provided with a clamping tooling 340 and a winding driving mechanism. The clamping tooling 340 is connected to both ends of the mandrel 100. The winding driving mechanism is used to drive the NOL ring manufacturing mold to move along the axial direction of the mandrel 100 and rotate around the axis of the mandrel 100. The yarn 400 is output to the outer peripheral wall of the barrel body 200 through the nozzle 310. Cooperating with the winding driving mechanism to drive the NOL ring manufacturing mold to move along the axial direction of the mandrel 100 and rotate around the axis of the mandrel 100, so that the yarn 400 is wound to form the winding part 410.

[0046] Refer to Figure 6 As shown, an embodiment of the present invention also provides a manufacturing method applicable to the above-mentioned NOL ring manufacturing device. The method includes: S100: Assemble the NOL ring manufacturing mold and lay a non-stick diaphragm on the outer periphery of the barrel body 200; S200: Install the NOL ring manufacturing mold on the winding machine; S300: Control the NOL ring manufacturing mold to move along the axial direction of the mandrel 100 and rotate around the axis of the mandrel 100 according to the preset winding thickness, so that the yarn 400 output by the wire feeding module 300 is wound on the outer peripheral wall of the barrel body 200 to form the winding part 410; S400: Cure the winding part 410 to form a composite material cylinder; S500: Separately detach at least two split parts 210 from the mandrel 100 axially one by one to take out the composite material cylinder. S600: Divide the composite material cylinder to obtain NOL ring specimens.

[0047] Among them, in S100, place the split parts 210 oppositely, tightly engage the first connecting part 212 and the second connecting part 213 with each other to form a barrel body 200 with a cylindrical structure. The barrel body 200 approaches the mandrel 100 axially along the mandrel 100, align the first engaging part 110 and the second engaging part 211, and continue to make the barrel body 200 approach the mandrel 100 axially along the mandrel 100 until the first engaging part 110 and the second engaging part 211 are inserted into each other. The barrel body 200 and the mandrel 100 form an integral body. The retaining piece 130 approaches the barrel body 200 axially along the connecting rod 120 until it abuts against the barrel body 200. The anti-adhesive diaphragm uses a polytetrafluoroethylene film, and the outer periphery of the barrel body 200 is fully covered with a polytetrafluoroethylene film to reduce the chemical adhesion between the yarn 400 and the barrel body 200, facilitating the removal of the formed composite material cylinder from the NOL ring preparation mold.

[0048] In S200, insert the connecting rod 120 into the clamping tooling 340 of the winding machine, and fix the entire NOL ring preparation mold on the winding machine through the locking of the clamping tooling 340 of the winding machine.

[0049] In S300, draw the yarn 400 on the yarn reel through the guide roller 320 to the nozzle 310. The nozzle 310 outputs the yarn 400 to the outer peripheral wall of the barrel body 200. The winding machine controls the axial movement of the NOL ring preparation mold along the mandrel 100 and the rotation around the axis of the mandrel 100 so that the yarn 400 is wound on the outer peripheral wall of the barrel body 200 to form a winding part 410. When the winding part 410 meets the NOL ring thickness requirement, the induction component 140 senses the signal change, the winding machine stops, and the output of the nozzle 310 stops.

[0050] In S400, move the entire NOL ring preparation mold into the curing furnace and cure it according to the curing process of the composite material used for the yarn 400. The winding part 410 forms a composite material cylinder.

[0051] In S500, take out the entire NOL ring preparation mold from the curing furnace, rotate and take out the retaining piece 130 axially along the connecting rod 120 in the direction away from the mandrel 100, and gently tap the docking position between the first connecting part 212 and the second connecting part 213 or the docking position between the first engaging part 110 and the second engaging part 211 with a cork hammer, so that the split parts 210 slide relative to each other axially along the mandrel 100 until they are separated, and take off the composite material cylinder from the mandrel 100.

[0052] In S600, the composite material cylinder is segmented with reference to the NOL ring standard to obtain a number of standard NOL ring specimens.

[0053] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] The embodiments of the present invention have been described in detail above with reference to the drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A NOL ring preparation mold, characterized in that: include: A core shaft, with at least two first engaging members arranged on the outer circumference thereof, wherein the at least two first engaging members are distributed along the circumference of the core shaft; The barrel body is coaxially sleeved on the outer circumference of the core shaft, and the barrel body includes at least two split bodies with arc-shaped cross-sections. At least two of the split bodies are distributed in sequence along the circumference of the core shaft to form the barrel body as a combined component. At least two of the split bodies are provided with second engaging members corresponding to the first engaging members facing the inner side of the core shaft, and at least two of the second engaging members are detachably plugged with at least two of the first engaging members along the axial direction of the core shaft.

2. The NOL ring preparation mold according to claim 1, characterized in that: The first engaging member includes a first groove extending along the axial direction of the core shaft, and the second engaging member includes a first boss extending along the axial direction of the core shaft. The first groove and the first boss are detachably plugged in along the axial direction of the core shaft.

3. The NOL ring preparation mold according to claim 1, characterized in that: The opposite sides of two adjacent split bodies are respectively provided with a first connecting portion and a second connecting portion, and the first connecting portion and the second connecting portion are detachably plugged in along the axial direction of the core shaft.

4. The NOL ring preparation mold according to claim 3, characterized in that: The first connection portion includes a second groove extending along the axial direction of the core shaft, and the second connection portion includes a second boss extending along the axial direction of the core shaft. The second groove and the second boss are detachably plugged in along the axial direction of the core shaft.

5. The NOL ring preparation mold according to claim 1, characterized in that: The core shaft is provided with a connecting rod, which is coaxially arranged at the center position of the core shaft, and both ends of the connecting rod extend out of the core shaft.

6. The NOL ring preparation mold according to claim 5, characterized in that: Blocking pieces are respectively sleeved on both ends of the connecting rod, and the blocking pieces are movably and adjustably arranged along the axial direction of the connecting rod so that the blocking pieces abut against the end of the barrel.

7. The NOL ring preparation mold according to claim 6, characterized in that: The two ends of the connecting rod are provided with threaded sections, and the center of the blocking piece is provided with a threaded hole matching the threaded sections.

8. The NOL ring preparation mold according to claim 6, characterized in that: The NOL ring preparation mold also includes an induction component, which includes a generator and a receiver. The generator and the receiver are respectively installed on the two baffles. The generator and the receiver are relatively arranged along the axial direction of the connecting rod. The generator and the receiver are respectively adjustable along the radial direction of the connecting rod so that the generator and the receiver are located on the outside of the barrel.

9. A NOL ring preparation device, characterized in that: include: The NOL ring preparation mold according to any one of claims 1 to 8; A wire outlet module and a winding machine, wherein the wire outlet module is provided with a wire nozzle located outside the barrel, and the winding machine is provided with a clamping tool and a winding drive mechanism, wherein the clamping tool is connected to both ends of the core shaft, and the winding drive mechanism is used to drive the NOL ring preparation mold to move axially along the core shaft and rotate around the axis of the core shaft.

10. A method for preparing a NOL ring, characterized in that: Applicable to the NOL ring preparation device as claimed in claim 9, the method comprising: Assembling the NOL ring preparation mold and laying an anti-sticking diaphragm on the outer periphery of the barrel; Installing the NOL ring preparation mold on the winding machine; According to a preset winding thickness, the NOL ring preparation mold is controlled to move along the axial direction of the core shaft and rotate around the axis of the core shaft, so that the yarn output by the wire output module is wound around the outer peripheral wall of the barrel to form a winding part; curing the wound portion to form a composite material cylinder; Separating at least two of the sub-bodies one by one from the mandrel in the axial direction to take out the composite material cylinder; The composite material cylinder is divided to obtain NOL ring samples.

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