Air bag rubber shuttle wheel and preparation method

Abstract

According to the air bag rubber shuttle wheel and the preparation method, a ternary rubber compound of chloroprene rubber, natural rubber and butadiene rubber is used as matrix rubber, and the mechanical property, wear resistance and heat resistance of a rubber matrix are improved by adding KEVLAR fibers, a two-dimensional nano material and the like. And the air bag type rubber shuttle wheel is constructed by the rubber matrix, and the air bag is integrally formed, so that the number of joints is small, the stress concentration is reduced, and the service life of the air bag type rubber shuttle wheel can be greatly prolonged. According to the shuttle wheel, a main heat conduction network is constructed through the two-dimensional nanosheets, the KEVLAR fibers can serve as an auxiliary heat conduction bridge to synergistically reduce dynamic heat generation, the heat conduction performance of the shuttle wheel is improved in combination with a hollow air bag structure, and the problems that an existing shuttle wheel is poor in high temperature resistance and heat conduction performance and short in service life are solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of rubber shuttle wheel, and more particularly relates to an air bag rubber shuttle wheel and a preparation method. BACKGROUND

[0002] The shuttle wheel is a core transmission component in a traditional weaving machine, and is mainly used for driving a shuttle to reciprocate between spindles to realize the interweaving of warp and weft yarns. During the high-speed operation and long-time work of the circular weaving machine, if the shuttle wheel has poor wear resistance, the shuttle wheel is prone to wear. When the wear reaches a certain degree, the circular weaving machine needs to be stopped for replacement, and the frequent stoppage operation greatly reduces the production efficiency and affects the production capacity of the enterprise. Therefore, the shuttle wheel needs to have good wear resistance, high heat resistance, and heat dissipation performance, that is, the shuttle wheel needs to resist the long-term wear of the yarn and the metal guide rail under high-speed friction and load; the heat generated by friction easily leads to material aging, so the heat resistance and effective heat dissipation of the shuttle wheel need to be improved to maintain the stable performance of the shuttle wheel.

[0003] In the polyurethane elastomer rubber wheel dedicated to the circular weaving machine in CN1868702A, polyurethane elastomer is used as the wheel body. The polyurethane elastomer has good wear resistance and high load capacity, and is suitable for the shuttle wheel of the high-speed circular weaving machine. However, the polyurethane elastomer has poor heat dissipation performance, and is prone to hardening and cracking under long-term work at high temperature. The cracking easily causes the mixing of debris into the fabric, resulting in quality problems such as surface defects and reduced strength of the fabric, and increasing the rate of defective products. In addition, the high-wear-resistance rubber shuttle wheel for the circular weaving machine in CN207811992U includes a ring-shaped wheel seat and a ring-shaped rubber body arranged outside the wheel seat. The rubber has good elasticity and good cushioning performance, and the wear resistance can be significantly improved through the filling system (such as carbon black) and the vulcanization process. However, the heat resistance of the rubber is limited, and the rubber is prone to softening and deformation under high temperature, which easily affects the normal conveying of the weft yarn and causes problems such as uneven density of the woven fabric. Therefore, on the basis of high wear resistance, the heat resistance of the existing shuttle wheel needs to be improved.

[0004] In addition, the shuttle wheels in the above two patents are solid. The solid body can provide high load capacity, but has strong deformation resistance under high-speed rotation. However, the heat conduction performance of the solid body is poor, the internal temperature rises quickly, and the material is prone to aging and cracking (as shown in Figure 1 ), thereby affecting the service life of the shuttle wheel. SUMMARY

[0005] To overcome the problems of poor heat resistance and heat conduction performance and short service life of the existing shuttle wheel, the application provides a preparation method of an air bag rubber shuttle wheel.

[0006] Another technical problem solved by the application is to provide an air bag rubber shuttle wheel.

[0007] The application is implemented by the following technical scheme:

[0008] A preparation method of an air bag rubber shuttle wheel, the preparation steps comprising:

[0009] S1. Rubber raw materials are mixed to prepare a rubber compound, and then the rubber compound is calendered to obtain a rubber compound sheet;

[0010] S2. The skeleton is combined with the rubber compound sheet to form a skeleton layer, and then two rubber compound sheets and the skeleton layer are roll-bonded in a structure of rubber compound-skeleton layer-rubber compound to obtain a sandwich structure of a rubber blank;

[0011] S3. The surface of the shuttle wheel seat is sandblasted and glued, then the rubber blank is sleeved on the wheel seat and bonded, and then placed in a vulcanizing machine for vulcanization to prepare an air bag rubber shuttle wheel.

[0012] Further, the rubber shuttle wheel raw material comprises, by weight, 50-70 parts of chloroprene rubber, 20-30 parts of natural rubber, 10-20 parts of butadiene rubber, 5-15 parts of KEVLAR fiber, 5-10 parts of zinc oxide, 5-10 parts of magnesium oxide, 0.5-2 parts of stearic acid, 20-60 parts of carbon black, 3-30 parts of two-dimensional nanomaterial, 0.5-3.0 parts of vulcanizing agent, and 1.5-5 parts of accelerator. The present application adopts a ternary blend of chloroprene rubber (CR), natural rubber (NR) and butadiene rubber (BR), which combines the advantages of each rubber, significantly improves the ozone resistance, weather resistance, wear resistance, low temperature resistance and low heat build-up on the basis of maintaining good mechanical properties, and also has certain oil resistance and flame resistance. Through the control of vulcanization and filling, the mechanical properties, wear resistance and heat resistance of the rubber matrix are further enhanced.

[0013] Further, it further comprises 6-12 parts of anti-aging agent, 5-15 parts of plasticizer, and 0.1-0.8 parts of anti-scorching agent.

[0014] Further, the anti-aging agent comprises a thermal-oxidative anti-aging agent, an ozone anti-aging agent and an ultraviolet absorber to improve its weather resistance.

[0015] Further, the two-dimensional nanomaterial comprises one or more of graphene, black phosphorus, clay, boron nitride (BN), molybdenum disulfide (MoS2), tungsten disulfide (WS2), molybdenum diselenide (MoSe2), tungsten diselenide (WSe2), and MXene.

[0016] Further, the skeleton comprises one or more of polyamide fiber, polyester fiber, polyvinyl alcohol fiber and aerogel yarn.

[0017] Further, the aerogel yarn is an aerogel yarn coated with a nanofiber protective layer, which is formed by spraying a solution of 78% volume fraction of mesoporous silica aerogel particles on a two-dimensional polyacrylonitrile nanofiber membrane as a carrier, and then continuously twisting to form an Archimedes spiral yarn structure.

[0018] Further, the skeleton is also subjected to tackifying treatment, the steps comprising immersing the skeleton into an aqueous solution of resorcinol and formaldehyde, and drying to obtain the tackified skeleton.

[0019] An air bag rubber shuttle wheel comprises a wheel base and a rubber air bag arranged on the wheel base.

[0020] Further, the wheel base and the rubber air bag are integrally formed, the forming method is simple, the production efficiency is high, the seams are less, the stress concentration is reduced, the service life of the air bag type rubber shuttle wheel can be greatly improved, and the air bag type rubber shuttle wheel is suitable for different working conditions of four-shuttle circular looms and six-shuttle circular looms.

[0021] Compared with the prior art, the beneficial effects are:

[0022] The present application uses a ternary mixed rubber of chloroprene rubber, natural rubber and butadiene rubber as the base rubber, and adds KEVLAR fibers in the base rubber, the KEVLAR fibers are in the form of pulp carried by rubber, which significantly improves the strength, wear resistance, tear resistance and puncture resistance of the rubber. The two-dimensional nanomaterial forms an ultra-long zigzag path in the rubber, greatly blocks the diffusion of gas molecules, and improves the air tightness of the rubber air bag. At the same time, the two-dimensional nanomaterial and carbon black form a "rigid-soft" multi-level reinforcing structure to improve the strength of the rubber. At the same time, the KEVLAR fibers and the two-dimensional nanomaterials synergistically enhance the heat resistance, wear resistance and thermal conductivity of the rubber matrix, the KEVLAR fibers provide a macro heat-resistant skeleton, the two-dimensional nanosheets block heat and oxygen at the micro level, forming a multi-level protection to improve heat resistance; the KEVLAR fibers resist macroscopic wear, the two-dimensional nanosheets enhance the matrix and reduce the friction coefficient to improve wear resistance; the two-dimensional nanosheets construct a dominant heat network, and the KEVLAR fibers can act as an auxiliary heat conduction bridge to synergistically reduce dynamic heat generation and improve product life.

[0023] On the one hand, the above-mentioned rubber raw material is used as the base of the air bag to meet the high wear resistance and high pressure bearing requirements of the high-speed rotation of the shuttle wheel. On the other hand, by constructing the air bag type rubber shuttle wheel, the heat conduction performance can be improved, the aging problem caused by internal overheating can be avoided, and the shuttle wheel can have good elasticity to provide good buffering performance and reduce noise.

[0024] The air bag rubber shuttle wheel prepared by the present application reduces the generation of wear debris and reduces the pollution risk to the fabric. The good heat resistance ensures that the physical form can still be maintained stable in a high temperature environment, ensures the accurate and stable transportation of weft threads, guarantees the uniformity and consistency of fabric weaving, effectively reduces the rate of defective products, and improves the product quality.

[0025] Drawings of the specification

[0026] Figure 1 The traditional shuttle wheel working condition runs for 7 days of heat aging cracking and center focus cracking.

[0027] Figure 2 The wear chart of the air bag rubber shuttle wheel for 30 days of operation. DETAILED DESCRIPTION

[0028] The present application is further explained and illustrated with reference to the following examples, which are not intended to limit the present application in any way. Unless otherwise indicated, the methods and materials used in the examples are conventional methods and materials used in the art, and the materials used are commercially available.

[0029] Example 1

[0030] A method for preparing an air bag rubber shuttle wheel, the preparation steps comprising:

[0031] S1. 10 parts of KEVLAR fiber are thinly passed 3-4 times on a two-roll open mill at room temperature, uniformly sheeted, and simultaneously put into a 70-80 The mixing chamber of the internal mixer is mixed for 2-3 minutes, then 4 parts of high-activity magnesium oxide (MgO), 1 part of stearic acid, 2.5 parts of antioxidant A (N-phenyl-1-naphthylamine), 2 parts of antioxidant 4020 (N-(1,3-dimethylbutyl)-N' phenyl-p-phenylenediamine), 3 parts of antioxidant W-300 (4,4'-thiobis(6-tert-butyl-3-methylphenol)), 2 parts of paraffin wax, 0.4 parts of 770DF (bis(2,2,6,6-tetramethyl-4-piperidyl succinate)), 50 parts of carbon black, 10 parts of MXene, and 10 parts of aromatic oil are mixed for 8-10 minutes, then 1 part of sulfur, 0.5 parts of N,N'-dicyclohexyl-2-benzothiazole sulfenamide (DZ), 1 part of dithiodibenzothiazole (DM), 5 parts of zinc oxide, 1 part of tetramethylthiuram monosulfide (TMTM), 1 part of N,N'-diphenyl guanidine (DOTG), and 0.3 parts of N-cyclohexylthiophthalimide (CTP) are mixed for 2-3 minutes, and finally the first mixing rubber sheet is thinly passed 3-4 times on the open mill to obtain a mixing rubber sheet.

[0032] S2. The polyester fiber is soaked in a water solution of resorcinol and formaldehyde, dried, and then put into the mixing rubber sheet on a four-roll calender to obtain a skeleton layer.

[0033] S3. The first mixing rubber sheet is first attached to a pre-forming machine, then the skeleton layer of the rubber sheet is attached and rolled and attached by a rolling device, then the second mixing rubber sheet is attached and rolled and attached again by the rolling device to obtain a rubber blank with a sandwich structure of mixing rubber-skeleton layer-mixing rubber;

[0034] S4. Sandblast the surface of the shuttle wheel seat and apply adhesive, then put the rubber blank on the wheel seat, and then put it on the vulcanizing machine to vulcanize the whole airbag to obtain the airbag rubber shuttle wheel.

[0035] Example 2

[0036] A method for preparing an airbag rubber shuttle, comprising the following steps:

[0037] S1. Pass 10 parts of KEVLAR fiber through a two-roll mill at room temperature 3-4 times to produce a uniform sheet. Simultaneously add this sheet to a 70-80°C solution along with 55 parts of chloroprene rubber (CR), 30 parts of natural rubber (NR), and 15 parts of butadiene rubber (BR). Mix in the mixing chamber of an internal mixer for 2-3 minutes, then add 4 parts of high-activity MgO, 1 part of stearic acid, 2.5 parts of antioxidant A, 2 parts of antioxidant 4020, 3 parts of antioxidant W-300, 2 parts of paraffin wax, 0.4 parts of 770DF, 50 parts of carbon black, 10 parts of MXene, and 10 parts of aromatic oil and mix for 8-10 minutes. Then add 1 part of sulfur, 0.5 parts of N,N'-dicyclohexyl-2-benzothiazole sulfenamide (DZ), 1 part of dithiodibenzothiazole (DM), 5 parts of zinc oxide, 1 part of tetramethylthiuram monosulfide (TMTM), 1 part of N,N'-di-o-tolueneguanidine (DOTG), and 0.3 parts of N-cyclohexylthiophthalimide (CTP) and mix for 2-3 minutes. Finally, pass through a triangular roll 3-4 times on an open mill and calender to obtain the compounded rubber sheet.

[0038] S2. The polyester fiber is impregnated with an aqueous solution of resorcinol and formaldehyde, dried, and then placed on a four-roll calender with the compound to prepare the skeleton layer.

[0039] S3. First, the first compounded rubber sheet is bonded to the preforming machine, then the skeleton layer with rubber is bonded and rolled together using a rolling device, then the second compounded rubber sheet is bonded and rolled together again using a rolling device to obtain a sandwich structure rubber preform of compounded rubber-skeleton layer compounded rubber.

[0040] S4. Sandblast the surface of the shuttle wheel seat and apply adhesive, then put the rubber blank on the wheel seat, and then put it on the vulcanizing machine to vulcanize the whole airbag to obtain the airbag rubber shuttle wheel.

[0041] Example 3

[0042] A method for preparing an airbag rubber shuttle, comprising the following steps:

[0043] S1. Pass 12 parts of KEVLAR fiber through a two-roll open mill at room temperature 3-4 times to produce a uniform sheet. Simultaneously place the sheet with 65 parts of CR, 25 parts of NR, and 10 parts of BR at 70-80°C. Mix in the mixing chamber of an internal mixer for 2-3 minutes, then add 5 parts ZnO, 1.5 parts stearic acid, 1.5 parts antioxidant KY-405 (4,4'-di(phenylisopropyl)diphenylamine), 2 parts 4010NA (N-isopropyl-N'-phenyl-p-phenylenediamine), 2 parts antioxidant ODA (4,4'-dioctyldiphenylamine), 0.3 parts TPPD (N-(p-toluenesulfonamide)-N'-phenyl-p-phenylenediamine), 2 parts microcrystalline wax, 0.2 parts 770DF, 0.3 parts UV-531 (2-hydroxy-4-n-octyloxybenzophenone), 40 parts carbon black, and 5 parts graphite. Mix 4 parts of phthalene, 4 parts of dioctyl phthalate (DOP), and 5 parts of linseed oil for 8-10 minutes. Then add 1.5 parts of sulfur, 0.5 parts of 2-(4-morpholinylthio)benzothiazole (NOBS), 1 part of dithiodibenzothiazole (DM), 20 parts of Pb3O4 (lead tetroxide), 0.5 parts of tetramethylthiuram monosulfide (TMTM), and 0.5 parts of N-cyclohexylthiophthalimide (CTP) and mix for 3-4 minutes. Finally, pass the mixture through a triangular mill 3-4 times and calender it to obtain the compounded rubber sheet.

[0044] S2. The polyester fiber is impregnated with an aqueous solution of resorcinol and formaldehyde, dried, and then placed on a four-roll calender with the compound to prepare the skeleton layer.

[0045] S3. First, the first compounded rubber sheet is bonded to the preforming machine, then the skeleton layer with rubber is bonded and rolled together using a rolling device, then the second compounded rubber sheet is bonded and rolled together again using a rolling device to obtain a sandwich structure rubber preform of compounded rubber-skeleton layer compounded rubber.

[0046] S4. Sandblast the surface of the shuttle wheel seat and apply adhesive, then put the rubber blank on the wheel seat, and then put it on the vulcanizing machine to vulcanize the whole airbag to obtain the airbag rubber shuttle wheel.

[0047] Example 4

[0048] A method for preparing an airbag rubber shuttle, comprising the following steps:

[0049] S1. Pass 8 parts of KEVLAR fiber through a two-roll mill at room temperature 3-4 times to produce a uniform sheet. Simultaneously place this sheet with 70 parts of CR, 15 parts of NR, and 15 parts of BR into a 70-80°C feed pan. Mix in the mixing chamber of an internal mixer for 2-3 minutes, then add 4 parts of high-activity MgO, 1 part of stearic acid, 2 parts of 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline (AW), 1.5 parts of N,N'-xylyl-p-phenylenediamine (DTPD), 0.7 parts of N,N'-bis(β-phenyl)-p-phenylenediamine (DNP), 0.3 parts of antioxidant H (N,N'-diphenyl-p-phenylenediamine), 2 parts of microcrystalline wax, 0.2 parts of 315 (UV absorber 315), 0.3 parts of 770DF, and 40 parts of carbon. Mix black, 5 parts molybdenum disulfide, and 10 parts butyl oleate for 8-10 minutes. Then add 1.5 parts sulfur, 1 part N-cyclohexyl-2-benzothiazole sulfenamide (CZ), 1 part M (2-mercaptobenzothiazole), 5 parts zinc oxide, 0.5 parts 3-methyl-2-thiazothione (MTT), and 0.4 parts N-cyclohexylthiophthalimide (CTP) and mix for 2-3 minutes. Finally, pass the mixture through a triangular mill 3-4 times and calender it to obtain the compounded rubber sheet.

[0050] S2. The polyester fiber is impregnated with an aqueous solution of resorcinol and formaldehyde, dried, and then placed on a four-roll calender with the compound to prepare the skeleton layer.

[0051] S3. First, the first compounded rubber sheet is bonded to the preforming machine, then the skeleton layer with rubber is bonded and rolled together using a rolling device, then the second compounded rubber sheet is bonded and rolled together again using a rolling device to obtain a sandwich structure rubber preform of compounded rubber-skeleton layer compounded rubber.

[0052] S4. Sandblast the surface of the shuttle wheel seat and apply adhesive, then put the rubber blank on the wheel seat, and then put it on the vulcanizing machine to vulcanize the whole airbag to obtain the airbag rubber shuttle wheel.

[0053] Compared with a traditional solid shuttle wheel, the temperature of the air-bag rubber shuttle wheels prepared in Examples 1 to 4 was measured under operation, and the results are shown in Table 1 below:

[0054] Table 1

[0055]

[0056] As shown in the table above, the airbag-type rubber shuttle prepared by this invention uses two-dimensional nanosheets to construct the main thermal network, and KEVLAR fibers can serve as an auxiliary thermal bridge to synergistically reduce dynamic heat generation. Combined with the airbag-type rubber shuttle, the temperature of the shuttle under operation can be significantly reduced, avoiding the problem of accelerated aging and cracking due to high temperature, and improving the service life of the shuttle.

[0057] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method for preparing an airbag rubber shuttle, characterized in that, The preparation steps include: S1. Rubber raw materials are mixed to prepare a compound rubber, which is then calendered to obtain a compound rubber sheet; S2. Calender the skeleton and the compounded rubber sheet to form a skeleton layer, and then roll and bond the two compounded rubber sheets and the skeleton layer in a compounded rubber-skeleton layer-compounded rubber structure to obtain a sandwich-structured rubber preform. S3. Sandblast the surface of the shuttle wheel seat and apply adhesive, then attach the rubber blank to the wheel seat and bond it, then put it into a vulcanizing machine for vulcanization to prepare an airbag-type rubber shuttle wheel.

2. The method for preparing an airbag rubber shuttle according to claim 1, characterized in that, The raw materials for the rubber shuttle, by weight, include 50-70 parts of chloroprene rubber, 20-30 parts of natural rubber, 10-20 parts of butadiene rubber, 5-15 parts of Kevlar fiber, 5-10 parts of zinc oxide, 5-10 parts of magnesium oxide, 0.5-2 parts of stearic acid, 20-60 parts of carbon black, 3-30 parts of two-dimensional nanomaterials, 0.5-3.0 parts of vulcanizing agent, and 1.5-5 parts of accelerator.

3. The method for preparing an airbag rubber shuttle according to claim 2, characterized in that, It also includes 6-12 parts of antioxidant, 5-15 parts of plasticizer, and 0.1-0.8 parts of scorch inhibitor.

4. The method for preparing an airbag rubber shuttle according to claim 3, characterized in that, The antioxidants include thermo-oxidative antioxidants, ozone antioxidants, and ultraviolet absorbers.

5. The method for preparing an airbag rubber shuttle according to claim 2, characterized in that, The two-dimensional nanomaterials include one or more of black phosphorus, clay, boron nitride, molybdenum disulfide, tungsten disulfide, molybdenum diselenide, tungsten diselenide, and MXene.

6. The method for preparing an airbag rubber shuttle according to claim 1, characterized in that, The skeleton includes one or more of polyamide fibers, polyester fibers, polyvinyl alcohol fibers, and aerogel yarns.

7. The method for preparing an airbag rubber shuttle according to claim 6, characterized in that, The aerogel yarn is made by using a two-dimensional polyacrylonitrile nanofiber membrane as a carrier, and by spraying a solution with mesoporous silica aerogel particles loaded with 78% by volume, and continuously twisting them to form an Archimedes spiral yarn structure, ultimately obtaining an aerogel yarn coated with a nanofiber protective layer.

8. The method for preparing an airbag rubber shuttle according to claim 1, characterized in that, The skeleton is also subjected to a thickening treatment, the steps of which include immersing the skeleton in an aqueous solution of resorcinol and formaldehyde and drying it to obtain a thickened skeleton.

9. A pneumatic rubber shuttle prepared according to any one of claims 1 to 8, characterized in that, Includes wheel seats and rubber airbags mounted on the wheel seats.

10. The airbag rubber shuttle according to claim 9, characterized in that, The wheel seat and the rubber airbag are integrally molded as an airbag.

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