CN-121992552-A - Preparation device and method for powder coated flexible wire

CN121992552ACN 121992552 ACN121992552 ACN 121992552ACN-121992552-A

Abstract

The application discloses a preparation device and a preparation method of a powder coated flexible wire, wherein the preparation device comprises a flexible wire, a yarn guide wheel, a winding device and a functional material coating component, wherein the coating component comprises a liquid feeding device, a powder feeding device and a curing unit which are sequentially arranged from bottom to top, and flexible wire channels which are coaxially aligned are arranged in the three components; the preparation method comprises four steps of guiding conveying, forming an adhesive liquid layer, coating dry powder, solidifying and forming, forming a uniform adhesive liquid layer by using a liquid feeding device and carrying out backflow multiplexing, wherein the powder feeding device forms a rotary powder flow by using an L-shaped air inlet pipe to realize multi-stage coating, intercepting and escaping powder recycling, and the solidifying unit accurately and temperature-control solidifying the adhesive liquid layer and the functional material dry powder.

Inventors

ZHAN JIANCHAO
ZHU YI
LI YING
ZHAO XIAOFENG
YAN ZHIYONG

Assignees

嘉兴大学

Dates

Publication Date: 20260508
Application Date: 20260205

Claims (10)

1. The preparation device of the powder coated flexible wire comprises a flexible wire, a yarn guide wheel, a flexible wire winding device and a functional material coating assembly, and is characterized in that the functional material coating assembly comprises a liquid feeding device, a powder feeding device and a curing unit which are sequentially arranged from bottom to top, wherein flexible wire channels (comprising a liquid feeding channel, a powder feeding channel and a curing channel) which are coaxially aligned are arranged in the three components; The liquid feeding device comprises a liquid feeding cylinder, a precise liquid feeding pump, a liquid inlet pipe, a liquid collecting funnel and an inverted powder blocking funnel, wherein the liquid inlet pipe faces the liquid feeding channel, the liquid collecting funnel is arranged at the bottom of the liquid feeding cylinder and is communicated with the precise liquid feeding pump to form an adhesion liquid reflux loop, the inverted powder blocking funnel is arranged at the top of the liquid feeding device, and the pipe diameter opening of the inverted powder blocking funnel is coaxially opposite to the pipe diameter opening of the liquid collecting funnel; The powder feeding device comprises a powder feeding cylinder, a precise screw powder feeder, an L-shaped air inlet pipe, a powder blocking funnel and a powder escape receiving funnel, wherein the L-shaped air inlet pipe is provided with a horizontal air outlet and a downward air outlet, and the powder blocking funnel is in butt joint with the powder escape receiving funnel to form a powder feeding channel and is coaxial with the liquid feeding channel; After being guided by the yarn guide wheel, the flexible wire rod sequentially passes through a liquid feeding channel, a powder feeding channel and a curing channel and is finally wound by a flexible wire rod winding device, wherein the liquid feeding device is used for forming an adhesive liquid layer on the surface of the flexible wire rod, the powder feeding device is used for enabling functional material dry powder to be attached to the adhesive liquid layer, and the curing unit is used for curing and forming the adhesive liquid layer and the functional material dry powder.
2. The device for preparing the powder coated flexible wire according to claim 1, wherein round holes for wire inlet and outlet are formed in the top and the bottom of the liquid feeding cylinder, the liquid inlet pipe is fixed on the side wall of the liquid feeding cylinder and is not less than 1cm away from the bottom of the liquid feeding cylinder, one end of the liquid inlet pipe is communicated with the precise liquid feeding pump, the other end of the liquid inlet pipe faces the flexible wire channel, and the liquid collecting funnel is arranged at the bottom of the liquid feeding cylinder.
3. The preparation device of the powder coated flexible wire rod according to claim 2, wherein the liquid feeding device further comprises a powder filtering cylinder arranged on the liquid feeding cylinder, a round hole at the top of the powder filtering cylinder is coaxially communicated with a powder collecting funnel tube at the bottom of the powder feeding device, an inverted powder blocking funnel is arranged at the bottom of the powder filtering cylinder and used for scraping an adhesion liquid layer on the surface of the flexible wire rod, and a pipe diameter opening of the inverted powder blocking funnel is coaxially opposite to a pipe diameter opening of the powder collecting funnel and is spaced at a distance of not less than 2cm.
4. The device for preparing the powder coated flexible wire according to claim 2, wherein the liquid inlet pipe is positioned at one end in the liquid feeding cylinder and is 1-3mm away from the flexible wire channel.
5. The preparation device of the powder coated flexible wire rod according to claim 1 is characterized in that the powder feeding device is arranged right above the liquid feeding device and comprises a powder feeding cylinder, a precise screw powder feeder, a powder feeding pipe, an air inlet pipe, a powder collecting funnel, a powder blocking funnel and a powder escaping receiving funnel, a round hole is formed in the center of the bottom of the powder feeding cylinder and used as an inlet and outlet of the flexible wire rod, the diameter of the round hole is larger than 2-4mm of the diameter of the wire rod, the powder feeding pipe is fixed on the side wall of the powder feeding cylinder and is 0.8-1cm away from the bottom of the powder feeding cylinder, one end of the powder feeding pipe is located in the powder feeding cylinder and extends out of 1-2mm, the other end of the powder feeding pipe is communicated with the precise screw powder feeder, the air inlet pipe and the powder feeding pipe are relatively fixed on the side wall of the powder feeding cylinder on the same horizontal plane, one end of the air inlet pipe is used for communicating with an air source, the powder blocking funnel and the pipe diameter opening of the powder escaping funnel are relatively contacted and assembled to form a powder feeding channel coaxial with the flexible wire rod channel, the powder collecting funnel is arranged at the bottom of the powder feeding cylinder, and the powder guiding the powder feeding funnel flows to the flexible wire rod.
6. The device for preparing the powder coated flexible wire according to claim 5, wherein the air inlet pipe has an L-shaped structure, and one end of the air inlet pipe, which is positioned in the powder feeding cylinder, is provided with a horizontal air outlet and a downward air outlet.
7. The preparation device of the powder coated flexible wire rod is characterized in that the curing unit comprises a dryer, a temperature control system and a wire rod conveying roller set, wherein the wire rod conveying roller set is arranged in the dryer and used for driving the flexible wire rod to pass through at a constant speed, and the temperature control system is used for adapting to curing requirements of different functional material dry powders and enabling an adhesion liquid layer and the functional material dry powder to be cured and formed within an adjusting range of 80-160 ℃.
8. A method for preparing a powder coated flexible wire, which is suitable for the preparation device of the powder coated flexible wire as claimed in any one of claims 1 to 7, and is characterized by comprising the following steps: s1, guiding and conveying, namely guiding flexible wires with the linear density of 15-16.7 tex (corresponding to 135-150D) through a yarn guiding wheel, and then feeding the flexible wires into a coaxial aligned flexible wire channel; S2, adhering an adhesive liquid to the surface of the flexible wire rod through a liquid feeding device, and forming a uniform adhesive liquid layer through scraping and coating by an inverted powder blocking funnel of the liquid feeding device, wherein the adhesive liquid is selected from dopamine solution, polymer spinning liquid, polyurethane adhesive, organic silica gel adhesive, acrylic ester adhesive, polyvinyl alcohol, bio-based flexible adhesive and any combination thereof, and is prepared by mixing adhesive liquid raw materials, solvent and auxiliary agent in proportion and stirring for 200-400 minutes at the rotation speed of 50-100 rpm; s3, coating the dry powder, namely conveying the functional material dry powder with the particle size of 20 nm-7 mu m into a powder feeding device arranged right above a liquid feeding device at the speed of 40 g/h-150 g/h through a precise screw powder feeder, and enabling the dry powder to be attached to the surface of an adhesive liquid layer by matching with air source air flow with the pressure of 0.2 MPa-0.3 MPa; S4, curing and forming, namely conveying the flexible wire with the dry powder layer into a curing unit, drying at 140 ℃ for 5 minutes, curing, and then winding by a flexible wire winding device to obtain the functional wire.
9. The method for preparing a powder coated flexible wire according to claim 8, wherein in step S2, the adhesive liquid is attached to the surface of the flexible wire for the first time through the liquid inlet pipe, and the excessive adhesive liquid is collected through the liquid collecting funnel and then returned for reuse.
10. The method for preparing the powder coated flexible wire according to claim 8, wherein in step S3, the functional material dry powder includes, but is not limited to, micro-nano nickel powder, micro-nano copper powder, micro-nano silver powder, micro-nano cobalt powder, micro-nano multi-element alloy powder, carbon black micro-nano powder, graphene powder, carbon nano tube powder, aerogel powder, micro-nano gas-sensitive powder, micro-nano photosensitive powder, micro-nano Wen Minfen, micro-nano humidity-sensitive powder, micro-nano antibacterial powder, micro-nano pearl powder, phase change capsules, micro-nano stealth paint, microcrystalline cellulose, micro-nano protein powder, super-hydrophobic silica nanoparticles, micro-nano transition metal oxide, micro-nano conductive polymer (including polythiophene, polyaniline and polypyrrole), micro-nano MXene powder, micro-nano perovskite powder, micro-nano boron nitride powder.

Description

Preparation device and method for powder coated flexible wire Technical Field The invention relates to the technical field of textile, in particular to a device and a method for preparing a powder coated flexible wire. Background With the rapid development of emerging fields such as intelligent wearing, medical protection, flexible electronics, industrial filtration and the like, the market is increasingly in need of multifunctional flexible wires with heat preservation, conductivity, antibiosis, gas sensitivity/photosensitivity/thermosensitive/humidity sensitivity and the like. The core of the wire rod is that functional powder is uniformly coated on the surface of a flexible core wire, and the preparation quality of the wire rod directly influences the service performance of a terminal product. However, the existing preparation technology of the powder coated flexible wire has obvious defects and problems, which are particularly characterized by low powder coating rate, large pollution, low speed and poor controllability, and the problems restrict the development of industry for a long time, wherein the traditional process mainly adopts a unidirectional powder blowing mode, powder can only act on the surface of the wire from one direction, so that coating is uneven, a large amount of powder cannot be effectively attached, raw materials are wasted, pollution is formed due to direct discharge of scattered powder, part of the process adopts wire rotation design for improving uniformity, the wire structure is easily damaged, the production speed is limited, the large-scale requirement is difficult to meet, and meanwhile, the key process parameter adjustment is limited, the controllability is insufficient, and the multi-scene production requirement cannot be adapted. The powder wet fluidization coating integrated machine disclosed by the publication No. CN202510601660.3 is a relatively close prior art, and has the core that coating of powder on a substrate is realized in a wet fluidization mode, but has the obvious defects that a large amount of solvent or water is needed in a wet process, so that the performance of functional powder is easy to be attenuated (such as sensitive powder is damped and invalid), waste liquid is also generated, the problem of serious pollution is aggravated, the uniformity of fluidization coating depends on the flow stability of a liquid medium, the powder adhesion amount is difficult to accurately control, the powder coating rate is low, the controllability is poor, the equipment suitability is limited, the flexibility of the wire is easy to be reduced due to liquid soaking when the flexible wire is coated, meanwhile, the drying procedure is additionally added in the follow-up wet process, the production period is prolonged, and the defect of low speed is further highlighted. Therefore, the invention aims to overcome the defects and problems of low powdering rate, large pollution, low speed, poor controllability and the like in the prior art, and provides a preparation method which has low manufacturing difficulty, strong practicability, high raw material utilization rate, strong controllability, strong adaptability and industrialization, and can adjust the types of functional particles according to different functional requirements to prepare the multifunctional flexible wire. Disclosure of Invention The application provides a preparation device of a powder coated flexible wire rod, which comprises a flexible wire rod, a yarn guide wheel, a flexible wire rod winding device and a functional material coating assembly, wherein the functional material coating assembly comprises a liquid feeding device, a powder feeding device and a curing unit which are sequentially arranged from bottom to top, and flexible wire rod channels (comprising a liquid feeding channel, a powder feeding channel and a curing channel) which are coaxially aligned are arranged in the three components; The liquid feeding device comprises a liquid feeding cylinder, a precise liquid feeding pump, a liquid inlet pipe, a liquid collecting funnel and an inverted powder blocking funnel, wherein the liquid inlet pipe faces the liquid feeding channel, the liquid collecting funnel is arranged at the bottom of the liquid feeding cylinder and is communicated with the precise liquid feeding pump to form an adhesion liquid reflux loop, the inverted powder blocking funnel is arranged at the top of the liquid feeding device, and the pipe diameter opening of the inverted powder blocking funnel is coaxially opposite to the pipe diameter opening of the liquid collecting funnel; The powder feeding device comprises a powder feeding cylinder, a precise screw powder feeder, an L-shaped air inlet pipe, a powder blocking funnel and a powder escape receiving funnel, wherein the L-shaped air inlet pipe is provided with a horizontal air outlet and a downward air outlet, and the powder blocking funnel is in butt joint with the powder escape