Process for manufacturing a cut-resistant fabric and manufacturing equipment thereof

Abstract

The application relates to the technical field of textiles, and discloses a manufacturing process of a cut-resistant fabric, which comprises the following steps: S1, raw material impurity removal; S2, softening modification; S3, yarn making; S4, yarn steaming; S5, yarn threading; S6, weaving; and S7, cleaning. The application further discloses a manufacturing device of the cut-resistant fabric, which comprises a guide wheel, a wax block device, a yarn feeding nozzle and a tongue-shaped needle arranged along the running direction of the cut-resistant yarn. The zinc oxide modified paraffin is used as a softening agent to modify the glass fiber, the surface of the glass fiber is changed from hydrophilicity to hydrophobicity under the premise of improving the flexibility of the glass fiber, the surface cleanliness of the metal wire is improved, the tensile strength of the glass fiber in a humid environment is improved, the surface adhesion of the metal wire is improved, the metal wire is conveniently dyed, and the bonding strength of the metal wire and the cut-resistant yarn is improved.

Description

Technical Field

[0001] This invention relates to the field of textile technology, specifically to a manufacturing process and equipment for cut-resistant fabrics. Background Technology

[0002] Cut-resistant fabric is a special type of textile material. By employing materials and weaving structures with high strength, high toughness, and abrasion resistance, it possesses excellent cut-resistant properties and is widely used in safety protection fields, such as puncture-resistant gloves, puncture-resistant clothing, and puncture-resistant shoes. The main materials of cut-resistant fabric include glass fiber, aramid fiber, ultra-high molecular weight polyethylene, and steel wire. These materials can currently be woven in one piece or into garment panels using computerized flat knitting machines.

[0003] Glass fiber is brittle and not wear-resistant, with a high coefficient of friction on its surface. During the drawing and weaving process, glass fiber inevitably breaks, and freshly drawn fibers are easily corroded by moisture in the air, reducing their strength. Furthermore, the surface lubrication of yarns formed by the composite of glass fiber and steel wire is poor; directly weaving glass fiber and steel wire onto a computerized flat knitting machine will accelerate the wear of the machine's needles. Summary of the Invention

[0004] The purpose of this invention is to provide a manufacturing process and equipment for cut-resistant fabrics to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a manufacturing process for cut-resistant fabric, comprising the following steps:

[0006] S1. Raw material impurity removal: Clean the glass fiber and metal wire with deionized water and vacuum dry them;

[0007] S2. Softening modification: After immersing glass fiber and metal wire in molten zinc oxide modified paraffin for 10-30 min, remove them and transfer them to a water bath. After distillation and cleaning for 1-2 min, dry them at 42-50℃.

[0008] S3. Yarn making: Glass fiber and metal wire are fed into a twisting machine, twisted into strands, and wound up to obtain cut-resistant yarn;

[0009] S4. Steaming the yarn: Put the cut-resistant yarn into the steaming machine and steam it continuously at 60-100℃ for 20-30 minutes, keep it warm for 60 minutes, and then cool it.

[0010] S5. Yarn threading: The cut-resistant yarn is transferred into the bobbin inside the computerized flat knitting machine. The yarn ends of the cut-resistant yarn are sequentially threaded through the guide wheel, the wax block device, the yarn feed nozzle, and the tongue needle. The wax block device includes a round tube, a retaining ring plate threaded to the end of the round tube near the guide wheel, an annular heating plate movably sleeved inside the round tube, a spring located between the retaining ring plate and the annular heating plate and in a compressed state, a tapered tube integrally formed with the end face of the round tube near the yarn feed nozzle, and zinc oxide modified paraffin blocks filled in the round tube and the tapered tube and located on the end face of the annular heating plate near the tapered tube.

[0011] S6. Knitting: Turn on the computer flat knitting machine, import the pattern program for the cut-resistant fabric, and knit according to the pattern program until completion to obtain the cut-resistant fabric.

[0012] S7. Cleaning: Immerse the cut-resistant fabric in a water bath and steam clean for 1-2 minutes, then dry.

[0013] Optionally, the glass fiber has a fineness of 50D-300D and a diameter of 12-25 µm;

[0014] Optionally, the synthetic fiber is any one or a combination of two or more of nylon, polyester, polyethylene fiber, and graphene-modified polyethylene fiber.

[0015] Optionally, the metal wire is any one or a combination of two or more of 304 stainless steel wire, 316L stainless steel wire, and tungsten wire, and the diameter of the metal wire is 0.02-0.10 mm.

[0016] Optionally, the ratio of glass fiber to metal wire is (5-10):1.

[0017] Optionally, the zinc oxide modified paraffin is formed by ultrasonically mixing nano zinc oxide, nano magnesium oxide and molten paraffin; the mass ratio of nano zinc oxide to nano magnesium oxide is (10-20):1, the average particle size of nano zinc oxide is 50 nm, and the average particle size of nano magnesium oxide is 30 nm.

[0018] On the other hand, the present invention also provides the following technical solution: a manufacturing equipment for cut-resistant fabric, comprising a computerized flat knitting machine for weaving cut-resistant yarn into cut-resistant fabric, wherein the computerized flat knitting machine comprises a guide roller, a wax block device, a yarn feeding nozzle and a tongue-shaped needle arranged along the direction of the cut-resistant yarn.

[0019] Optionally, two connecting rods are fixedly connected to the end face of the annular heating plate away from the tapered tube, and the connecting rods slide through the retaining ring plate.

[0020] Optionally, a filling tube is fixedly provided at the top of the round tube, and a sealing cap is threadedly connected to the top of the filling tube.

[0021] Optionally, the tongue-shaped needle is made of 316L stainless steel.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. This invention uses zinc oxide modified paraffin as a softener to modify glass fiber. While improving the flexibility of glass fiber, it changes the surface of glass fiber from hydrophilic to hydrophobic, and improves the cleanliness of the metal wire surface. This, in turn, improves the tensile strength of glass fiber in humid environments, and improves the adhesion of the metal wire surface, making it easier to dye the metal wire. It also improves the bonding strength between the metal wire and glass fiber, and makes it less likely for the glass fiber to detach from the metal wire after breakage, thus preventing skin damage.

[0024] 2. In this invention, the zinc oxide modified paraffin wax used as a softener has the same composition as the zinc oxide modified paraffin wax block in the wax block device, and the two have a good combination effect. The nano zinc oxide enhances the latent heat storage of the zinc oxide modified paraffin wax, which is stable under normal conditions and can be softened uniformly when heated. The zinc oxide modified paraffin wax has good fluidity, and when there is enough zinc oxide modified paraffin wax, it can fully coat the cut-resistant yarn and improve the surface lubricity of the cut-resistant yarn. The nano magnesium oxide mixed in the zinc oxide modified paraffin wax can realize the antibacterial and antistatic functions of the yarn surface.

[0025] 3. This invention can reduce the thickness of zinc oxide modified paraffin on the surface of the cut-resistant yarn by controlling the distillation cleaning time, removing excess paraffin, improving the quality of the cut-resistant fabric, and is simple to operate and easy to control. Furthermore, by coating the cut-resistant yarn with zinc oxide modified paraffin, the internal stress and surface friction of the cut-resistant yarn are reduced, the difficulty of tongue needle weaving is reduced, and the service life of the tongue needle is extended. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the manufacturing equipment for the cut-resistant fabric in this invention;

[0027] Figure 2 This is a schematic diagram of the wax block device in this invention.

[0028] In the diagram: 100, guide roller; 200, wax block device; 201, round tube; 202, baffle plate; 203, annular heating plate; 204, spring; 205, tapered tube; 206, zinc oxide modified paraffin block; 207, connecting rod; 208, filling tube; 209, sealing cap; 300, yarn nozzle; 400, tongue-shaped needle; 500, anti-cut yarn. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0030] Example 1: This invention provides a method for manufacturing a cut-resistant fabric, comprising the following steps:

[0031] S1. Raw material impurity removal: Glass fiber and 304 stainless steel wire in a ratio of 5:1 are washed with deionized water and vacuum dried.

[0032] S2. Softening modification: Immerse glass fiber and 304 stainless steel wire in molten zinc oxide modified paraffin for 10 min, remove and transfer to a water bath, distill and clean for 1 min, and then dry at 42℃.

[0033] S3. Yarn making: Glass fiber, nylon and 304 stainless steel wire are fed into a twisting machine, twisted into strands, and wound up to obtain cut-resistant yarn 500.

[0034] S4. Steaming yarn: Put 500 anti-cut yarn into the steaming machine and steam the yarn continuously at 60℃ for 20 minutes, keep it warm for 60 minutes, and then cool it.

[0035] S5. Yarn threading: Transfer the anti-cut yarn 500 into the bobbin inside the computerized flat knitting machine, and thread the end of the anti-cut yarn 500 through the guide wheel 100, wax block device 200, yarn feeder 300 and tongue needle 400 in sequence.

[0036] S6. Knitting: Turn on the computer flat knitting machine, import the pattern program for the cut-resistant fabric, and knit according to the pattern program until completion to obtain the cut-resistant fabric.

[0037] S7. Cleaning: Immerse the cut-resistant fabric in a water bath, steam clean for 1 minute, and then dry.

[0038] Example 2: This invention provides a method for manufacturing a cut-resistant fabric, comprising the following steps:

[0039] S1. Raw material impurity removal: Glass fiber and 316L stainless steel wire in a ratio of 6:1 are washed with deionized water and vacuum dried.

[0040] S2. Softening modification: Immerse glass fiber and 316L stainless steel wire in molten zinc oxide modified paraffin for 15 min, remove and transfer to a water bath, distill and clean for 1.5 min, and then dry at 44℃.

[0041] S3. Yarn making: Glass fiber, nylon, polyester and 316L stainless steel wire monofilaments are fed into a twisting machine, twisted into strands, and wound up to obtain 500 cut-resistant yarn.

[0042] S4. Steaming yarn: Put 500 anti-cut yarn into the steaming machine and steam the yarn continuously at 70℃ for 24 minutes, keep it warm for 60 minutes, and then cool it.

[0043] S5. Yarn threading: Transfer the anti-cut yarn 500 into the bobbin inside the computerized flat knitting machine, and thread the end of the anti-cut yarn 500 through the guide wheel 100, wax block device 200, yarn feeder 300 and tongue needle 400 in sequence.

[0044] S6. Knitting: Turn on the computer flat knitting machine, import the pattern program for the cut-resistant fabric, and knit according to the pattern program until completion to obtain the cut-resistant fabric.

[0045] S7. Cleaning: Immerse the cut-resistant fabric in a water bath, steam clean for 1 minute, and then dry.

[0046] Example 3: This invention provides a method for manufacturing a cut-resistant fabric, comprising the following steps:

[0047] S1. Raw material impurity removal: Glass fiber and tungsten wire in a ratio of 7:1 are washed with deionized water and then vacuum dried;

[0048] S2. Softening modification: Glass fiber and tungsten wire are immersed in molten zinc oxide modified paraffin for 25 min, removed and transferred to a water bath, distilled and washed for 1.5 min, and then dried at 448℃.

[0049] S3. Yarn making: Glass fiber, polyethylene fiber and tungsten wire are fed into a twisting machine, twisted into strands, and wound up to obtain cut-resistant yarn 500.

[0050] S4. Steaming yarn: Put 500 anti-cut yarn into the steaming machine and steam it continuously at 90℃ for 28 minutes, keep it warm for 60 minutes, and then cool it.

[0051] S5. Yarn threading: Transfer the anti-cut yarn 500 into the bobbin inside the computerized flat knitting machine, and thread the end of the anti-cut yarn 500 through the guide wheel 100, wax block device 200, yarn feeder 300 and tongue needle 400 in sequence.

[0052] S6. Knitting: Turn on the computer flat knitting machine, import the pattern program for the cut-resistant fabric, and knit according to the pattern program until completion to obtain the cut-resistant fabric.

[0053] S7. Cleaning: Immerse the cut-resistant fabric in a water bath, steam clean for 2 minutes, and then dry.

[0054] Example 4: This invention provides a method for manufacturing a cut-resistant fabric, comprising the following steps:

[0055] S1. Raw material impurity removal: Glass fiber and metal wire in a ratio of 10:1 are washed with deionized water and vacuum dried. The metal wire is 316L stainless steel wire and tungsten wire.

[0056] S2. Softening modification: Glass fiber, 316L stainless steel wire and tungsten wire are immersed in molten zinc oxide modified paraffin for 30 min, taken out and transferred to a water bath, distilled and washed for 2 min, and then dried at 50℃.

[0057] S3. Yarn making: Glass fiber, polyethylene fiber, graphene-modified polyethylene fiber, 316L stainless steel wire and tungsten wire are fed into a twisting machine, twisted into strands, and wound up to obtain 500 cut-resistant yarn.

[0058] S4. Steaming yarn: Put 500 anti-cut yarn into the steaming machine and steam it continuously at 100℃ for 30 minutes, keep it warm for 60 minutes, and then cool it.

[0059] S5. Yarn threading: Transfer the anti-cut yarn 500 into the bobbin inside the computerized flat knitting machine, and thread the end of the anti-cut yarn 500 through the guide wheel 100, wax block device 200, yarn feeder 300 and tongue needle 400 in sequence.

[0060] S6. Knitting: Turn on the computer flat knitting machine, import the pattern program for the cut-resistant fabric, and knit according to the pattern program until completion to obtain the cut-resistant fabric.

[0061] S7. Cleaning: Immerse the cut-resistant fabric in a water bath, steam clean for 2 minutes, and then dry.

[0062] In Examples 1-4, the glass fiber fineness was 150 D, and the glass fiber diameter was 20 µm. The metal wire diameter was 0.04 mm. The zinc oxide modified paraffin was prepared by ultrasonically mixing nano-zinc oxide, nano-magnesium oxide, and molten paraffin, with a mass ratio of nano-zinc oxide to nano-magnesium oxide of 15:1. The average particle size of the nano-zinc oxide was 50 nm, and the average particle size of the nano-magnesium oxide was 30 nm.

[0063] In Examples 1-4, the computerized flat knitting machine can use an integral molding method to knit the cut-resistant yarn 500 into a cut-resistant fabric, or it can first knit the cut-resistant yarn 500 into multiple garment pieces, and then sew the multiple garment pieces together with a sewing machine to obtain the cut-resistant fabric.

[0064] This invention uses zinc oxide-modified paraffin as a softener to modify glass fiber. While improving the flexibility of glass fiber, it changes the surface of glass fiber from hydrophilic to hydrophobic, and improves the cleanliness of the metal wire surface. This, in turn, improves the tensile strength of glass fiber in humid environments, and improves the adhesion of the metal wire surface, making it easier to dye the metal wire. It also improves the bonding strength between the metal wire and glass fiber, and makes it less likely for the glass fiber to detach from the metal wire after breakage, preventing broken glass fiber from detaching from the cut-resistant fabric and causing skin damage.

[0065] Compared to conventional softeners like paraffin wax, nano-zinc oxide enhances latent heat storage and maintains stable form at room temperature. When the cut-resistant yarn comes into contact with zinc oxide-modified paraffin wax before weaving, friction occurs. Because the nano-zinc oxide forms a thermally conductive mesh structure within the paraffin wax, the heat generated by friction is evenly distributed throughout the wax, allowing for uniform softening. The good fluidity of zinc oxide-modified paraffin wax allows it to fully coat the cut-resistant yarn, improving its surface lubricity. The nano-magnesium oxide incorporated into the zinc oxide-modified paraffin wax provides antibacterial and antistatic properties to the yarn surface. Compared to conventional softeners like polyethylene wax, zinc oxide-modified paraffin wax has a lower melting point, making it easier to coat the cut-resistant yarn surface and remove excess wax through distillation. Furthermore, its composition is consistent with the zinc oxide-modified paraffin wax block 206 within the wax block device 200, resulting in a good bonding effect.

[0066] Test case

[0067] Experimental subjects: experimental group and control group 1-3. Among them, experimental group: Examples 1-4; control group 1: plain knitted garment using two strands of 100D polyester covered with 200D HPPE and 100D glass fiber yarn; control group 2: ribbed knitted garment using two strands of 100D polyester covered with 200D HPPE and 100D glass fiber yarn; control group 3: ribbed knitted garment using three strands of 100D polyester covered with 200D HPPE and 100D glass fiber yarn.

[0068] Test Method: A specific cutting test was conducted using the ASTM F2992-15 test method, which employs a TDM (Tom dynamometer) cutting tester. The TDM cutting tester uses a straight-edged blade that moves 20 mm along a unidirectional path across the material until it cuts through. The cutting force of the TDM cutting tester is recorded in grams (200–7000 g) for A1-A9 ratings. Test results are shown in Table 1.

[0069] Table 1

[0070]

[0071] As shown in Table 1, Examples 1-4 can all produce cut-resistant fabrics with an ANSI cutting grade of A9. The cut-resistant fabric prepared in Example 4 has the greatest cutting force and the strongest cut resistance, and is worth promoting and using.

[0072] Please see Figure 1 and Figure 2 The present invention also provides a manufacturing device for cut-resistant fabric, including a computerized flat knitting machine for weaving cut-resistant yarn 500 into cut-resistant fabric. The computerized flat knitting machine includes a guide roller 100, a wax block device 200, a yarn feed nozzle 300, and a tongue-shaped needle 400 arranged along the direction of the cut-resistant yarn 500. The tongue-shaped needle 400 is made of 316L stainless steel, which has excellent wear resistance and strength.

[0073] The wax block device 200 includes a round tube 201, a retaining ring plate 202 threadedly connected to the end of the round tube 201 near the guide roller 100, an annular heating plate 203 movably sleeved inside the round tube 201, a spring 204 located between the retaining ring plate 202 and the annular heating plate 203 and in a compressed state, a tapered tube 205 integrally formed with the end face of the round tube 201 near the yarn feed nozzle 300, and a zinc oxide modified paraffin block 206 filled inside the round tube 201 and the tapered tube 205 and located on the end face of the annular heating plate 203 near the tapered tube 205.

[0074] The annular aperture of the baffle plate 202, the annular aperture of the annular heating plate 203, and the minimum aperture of the tapered tube 205 are the maximum thickness of the zinc oxide modified paraffin wax 206 on the cut-resistant yarn 500. In this invention, the annular heating plate 203 heats the zinc oxide modified paraffin wax block 206, causing the zinc oxide modified paraffin wax block 206 inside the circular tube 201 to be in a molten state, while the zinc oxide modified paraffin wax block 206 at the outlet side of the tapered tube 205 is in a solid state. The zinc oxide modified paraffin wax block 206 can wrap around the cut-resistant yarn 500 inside the circular tube 201. When the amount of zinc oxide modified paraffin wax 206 inside the circular tube 201 decreases due to coating the cut-resistant yarn 500, the spring 204 can push the annular heating plate 203 towards the outlet of the tapered tube 205, allowing the zinc oxide modified paraffin wax 206 to refill the circular tube 201, achieving sufficient waxing of the surface of the cut-resistant yarn 500.

[0075] Zinc oxide modified paraffin coating the surface of cut-resistant yarn 500 reduces surface friction, reduces the weaving difficulty of tongue needle 400, and extends the service life of tongue needle 400.

[0076] Two connecting rods 207 are fixedly connected to the end face of the annular heating plate 203 away from the conical tube 205. The two connecting rods 207 serve as positive and negative terminals and are connected to the outside. The two connecting rods 207 are electrically connected to the annular heating plate 203 to supply energy to the annular heating plate 203. The connecting rods 207 slide through the baffle plate 202 to guide the movement of the annular heating plate 203, so that the annular heating plate 203 can uniformly push the molten zinc oxide modified paraffin block 206 towards the outlet of the conical tube 205.

[0077] Furthermore, by observing the length of the connecting rod 207 entering the circular tube 201, the remaining amount of zinc oxide modified paraffin blocks 206 in the circular tube 201 and the tapered tube 205 can be determined, facilitating timely replenishment of the zinc oxide modified paraffin blocks 206. The top of the circular tube 201 has an integrally formed filling tube 208, through which zinc oxide modified paraffin blocks 206 can be directly replenished into the circular tube 201, which is simple and convenient. Before replenishing the zinc oxide modified paraffin blocks 206, the connecting rod 207 needs to be manually pulled away from the outlet of the tapered tube 205 to ensure sufficient space for filling within the tapered tube 205. The top of the filling tube 208 is threaded with a sealing cap 209, which seals the filling tube 208 to prevent leakage of zinc oxide modified paraffin blocks 206.

[0078] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A manufacturing process for a cut-resistant fabric, characterized in that: Includes the following steps: S1. Raw material impurity removal: Clean the glass fiber and metal wire with deionized water and vacuum dry them; S2. Softening modification: After immersing glass fiber and metal wire in molten zinc oxide modified paraffin for 10-30 min, remove them and transfer them to a water bath. After distillation and cleaning for 1-2 min, dry them at 42-50℃. S3. Yarn making: First, put glass fiber, synthetic fiber and metal wire into a twisting machine, twist them into strands, and then wind them up to get cut-resistant yarn (500); S4. Steaming: Put the cut-resistant yarn (500) into the steaming machine and steam it continuously at 60-100℃ for 20-30 minutes, keep it warm for 60 minutes, and then cool it. S5. Yarn Threading: Transfer the cut-resistant yarn (500) into the bobbin inside the computerized flat knitting machine, and thread the end of the cut-resistant yarn (500) through the guide wheel (100), the wax block device (200), the yarn feed nozzle (300), and the tongue needle (400) in sequence; the wax block device (200) includes a round tube (201) and a retaining ring plate (202) threadedly connected to the end of the round tube (201) near the guide wheel (100), which is movably sleeved on the round tube (201). The ring heating plate (203) inside, the spring (204) located between the baffle plate (202) and the ring heating plate (203) and in a compressed state, the tapered tube (205) integrally formed with the end face of the round tube (201) near the yarn feeding nozzle (300), and the zinc oxide modified paraffin block (206) filled in the round tube (201) and the tapered tube (205) and located on the end face of the ring heating plate (203) near the tapered tube (205); S6. Knitting: Turn on the computer flat knitting machine, import the pattern program for the cut-resistant fabric, and knit according to the pattern program until completion to obtain the cut-resistant fabric. S7. Cleaning: Immerse the cut-resistant fabric in a water bath and steam clean for 1-2 minutes, then dry.

2. The manufacturing process of a cut-resistant fabric according to claim 1, characterized in that: The glass fiber has a fineness of 50D-300D and a diameter of 12-25 µm.

3. The manufacturing process of a cut-resistant fabric according to claim 1, characterized in that: The synthetic fiber is any one or a combination of two or more of nylon, polyester, polyethylene fiber, and graphene-modified polyethylene fiber.

4. The manufacturing process of a cut-resistant fabric according to claim 1, characterized in that: The metal wire is any one or a combination of two or more of 304 stainless steel wire, 316L stainless steel wire, and tungsten wire, and the diameter of the metal wire is 0.02-0.10 mm.

5. The manufacturing process of a cut-resistant fabric according to claim 1, characterized in that: The ratio of glass fiber to metal wire is (5-10):

1.

6. The manufacturing process of a cut-resistant fabric according to claim 1, characterized in that: The zinc oxide modified paraffin is made by ultrasonically mixing nano zinc oxide, nano magnesium oxide and molten paraffin; the mass ratio of nano zinc oxide to nano magnesium oxide is (10-20):1, the average particle size of nano zinc oxide is 50 nm and the average particle size of nano magnesium oxide is 30 nm.

7. A manufacturing apparatus for implementing the manufacturing process of a cut-resistant fabric according to any one of claims 1-6, characterized in that: The computerized flat knitting machine includes a cut-resistant yarn (500) for knitting into cut-resistant fabric, the computerized flat knitting machine including a guide roller (100) arranged along the direction of the cut-resistant yarn (500), a wax block device (200), a yarn feeder (300) and a tongue needle (400).

8. The manufacturing equipment according to claim 7, characterized in that: Two connecting rods (207) are fixedly connected to the end face of the annular heating plate (203) away from the tapered tube (205), and the connecting rods (207) slide through the retaining ring plate (202).

9. The manufacturing equipment according to claim 7, characterized in that: The top of the round tube (201) is fixedly provided with a filling tube (208), and the top of the filling tube (208) is threadedly connected with a sealing cap (209).

10. The manufacturing equipment according to claim 7, characterized in that: The tongue-shaped needle (400) is made of 316L stainless steel.

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