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CN-121975306-A - Graphene polymer composite material with self-repairing function, circular loom cam and manufacturing method thereof

CN121975306ACN 121975306 ACN121975306 ACN 121975306ACN-121975306-A

Abstract

The invention provides a graphene polymer composite material with a self-repairing function, a circular loom cam and a manufacturing method thereof, the composite material comprises a polymer matrix, a chopped fiber reinforced material, a functionalized graphene composite lubrication repairing agent and a processing aid in parts by weight. The functional graphene composite lubrication repairing agent is composed of an amino functional graphene loaded nano repairing agent, a solid lubricating film can be formed at an interface in the friction process to reduce friction, and when the surface is worn, the carrier is broken and releases the repairing agent to realize targeted repair of a damaged area. The circular loom cam formed by the material through precise injection molding has the characteristics of light weight, high strength, wear resistance, low friction coefficient and intelligent self-repairing, remarkably prolongs the service life and avoids the pollution of lubricating grease to fabrics.

Inventors

  • LI HUAIDONG

Assignees

  • 河南省豫众不同新材料有限公司

Dates

Publication Date
20260505
Application Date
20260210

Claims (10)

  1. 1. The cam of the circular loom is made of a polymer composite material, and is characterized by comprising the following components in parts by weight: 50-95 parts of a polymer matrix; 5-50 parts of chopped fiber reinforced material; 0-10 parts of a functionalized graphene composite lubrication repairing agent; 0-5 parts of processing aid; the functionalized graphene composite lubrication repairing agent comprises modified graphene and a nano repairing agent loaded on the modified graphene, and is configured to be capable of spreading on a friction interface to form a lubrication film in a friction process, and release the nano repairing agent to repair damage due to carrier rupture when abrasion occurs.
  2. 2. The circular loom cam of claim 1, wherein said polymer matrix is one or more of polyamide, polyphenylene sulfide, polyoxymethylene, polyetheretherketone, polyurethane, ultra high molecular weight polyethylene.
  3. 3. The cam of claim 1, wherein the chopped fiber reinforcement is one or more of glass fiber and carbon fiber.
  4. 4. The circular loom cam of claim 1, wherein said processing aid comprises one or more of a heat stabilizer and an antioxidant.
  5. 5. The cam of a circular knitting machine according to claim 1, wherein the nano repairing agent is calcium borate or polytetrafluoroethylene nano particles, the particle size of the nano repairing agent is 50-100nm, and the mass ratio of the modified graphene to the nano repairing agent is 1:0.1-1:0.5.
  6. 6. The circular loom cam according to any one of claims 1 to 5, wherein the circular loom cam is made of an olefin polymer composite material by precision injection molding.
  7. 7. The circular loom cam of claim 6, wherein said cam comprises a hub and a peripheral cam working profile, said cam working profile surface having a roughness Ra of 0.8 μm or less.
  8. 8. A method for preparing a circular loom cam according to any one of claims 1 to 7, characterized by comprising the steps of: ① Dispersing graphene oxide in a solvent, adding a silane coupling agent or ethylenediamine to perform functional modification, and then adding a nano repairing agent to obtain the functional graphene composite lubrication repairing agent through ultrasonic loading; ② Blending and granulating, namely mixing a polymer matrix, a chopped fiber reinforced material, a processing aid and the functionalized graphene composite lubrication repairing agent, and carrying out melt blending and granulating at 160-380 ℃ through a double-screw extruder to obtain composite material particles; ③ Injection molding, namely injecting the composite material particles into a cam die, and molding at the die temperature of 80-120 ℃ and the injection pressure of 80-120MPa to obtain a cam blank; ④ Post-processing, namely carrying out stress relief annealing and/or surface finishing on the cam blank.
  9. 9. The method for manufacturing the cam of the circular weaving machine according to claim 8, wherein the twin-screw melt blending adopts a co-rotating twin-screw extruder, the screw rotation speed is 200-300 rpm, and a high-shear screw combination comprising kneading blocks is adopted.
  10. 10. The method for manufacturing the cam of the circular weaving machine according to claim 9, wherein the polymer matrix is added from a main feeding port and the functionalized graphene composite lubricating repairing agent and the chopped fibers are added from a side feeding port by adopting a side feeding mode.

Description

Graphene polymer composite material with self-repairing function, circular loom cam and manufacturing method thereof Technical Field The invention relates to the technical field of manufacturing of circular loom cam materials, in particular to a graphene polymer composite material with a self-repairing function, a circular loom cam and a manufacturing method thereof. Background Circular knitting machines are the core equipment of the textile industry, the performance of the cam mechanism of which directly determines the weaving efficiency, the quality of the fabric and the reliability of the long-term operation of the equipment. The cam continuously bears periodic impact and sliding friction in the high-speed running process, so that very severe comprehensive requirements are put on materials, namely the cam must have high bearing capacity and wear resistance, low friction is realized to reduce energy consumption, and meanwhile, the requirements of light weight, low noise, no maintenance or long service life and the like are met. The traditional widely used metal cam has higher strength and wear resistance, but has the obvious defects of high equipment inertia, increased energy consumption, prominent running noise and continuous external grease lubrication. The maintenance cost and the complexity are improved, the fabric is more easily polluted by leakage or splashing of grease, and the product quality is seriously affected. To solve the above problems, engineering plastic cams are increasingly used. The materials such as Polyoxymethylene (POM), nylon (PA) and the like can realize light weight, self lubrication and noise reduction to a certain extent, and fundamentally avoid lubrication pollution. However, common engineering plastics still have a gap from metallic materials in terms of mechanical strength, rigidity, creep resistance and wear resistance. In particular, under the action of long-term high load and alternating stress, plastic deformation and abrasion are easy to occur, so that the cam profile accuracy is reduced, and the service life is generally shorter than that of a metal cam, which becomes a main bottleneck for restricting the wide popularization of the metal cam. To further improve the performance of engineering plastic cams, the prior art generally adopts a combination of fiber reinforcement and addition of solid lubricants, such as glass fiber or carbon fiber added to a matrix to improve strength and rigidity, and solid lubricants such as polytetrafluoroethylene, molybdenum disulfide or graphite are simultaneously added to reduce friction coefficient. However, the solid lubricant is continuously consumed, transferred and worn out during the friction process, the lubrication function of the solid lubricant has irreversible attenuation, and once the solid lubricant is consumed, the friction coefficient is rapidly increased, the wear is accelerated, and the performance cannot be recovered. In addition, when scratches or microcracks are generated on the friction surface due to unexpected working conditions such as hard particle invasion, instantaneous overload and the like, the local lubricating film can be rapidly damaged and consumed in an accelerating way, and the damaged part can become a stress concentration point and a new abrasion starting point due to the lack of an effective repairing mechanism, so that the whole failure of the part is accelerated. The invention provides a graphene polymer composite material with a self-repairing function, a circular loom cam and a manufacturing method thereof. By introducing the functionalized graphene composite lubrication repairing agent, the material can not only provide continuous lubrication in the friction process and reduce friction and wear, but also perform targeted repair on surface damage caused by special working conditions. Meanwhile, newly generated graphene fragments can immediately participate in lubrication, and a secondary lubrication enhancement effect is formed in a damaged area. The process can not only effectively inhibit damage expansion, but also promote the rapid recovery of the friction interface state, thereby breaking the vicious circle of damage-accelerated wear, remarkably prolonging the service life of the cam and improving the operation reliability of equipment. Disclosure of Invention (One) solving the technical problems Aiming at the defects of the prior art, the invention provides a graphene polymer composite material with a self-repairing function, a circular loom cam and a manufacturing method thereof, so as to solve the problems in the prior art. (II) technical scheme In order to achieve the purpose, the graphene polymer composite material with the self-repairing function is realized by the following technical scheme that the graphene polymer composite material comprises the following components in parts by weight: 50-85 parts of a polymer matrix; 15-40 parts of chopped fiber reinforced material; 2-10 parts of