CN113584612A

CN113584612A - Continuous melting centrifugal electrostatic spinning production equipment capable of being connected in series along two directions

Info

Publication number: CN113584612A
Application number: CN202111039354.3A
Authority: CN
Inventors: 刘勇; 于文龙
Original assignee: Beijing University of Chemical Technology
Current assignee: Beijing University of Chemical Technology
Priority date: 2021-09-06
Filing date: 2021-09-06
Publication date: 2021-11-02

Abstract

The invention discloses continuous melting centrifugal electrostatic spinning production equipment capable of being connected in series along two directions, which comprises a throwing disc or a series throwing disc, a receiving crawler belt, a guide rail, a control console, a temperature measuring probe, a heating disc, a feeding pipe and a motor, wherein the throwing disc or the series throwing disc is made of pure metal, the rotating central shaft of the throwing disc is parallel to the ground, a spinning outlet is formed in the side edge of the throwing disc, fluid materials in a cavity can be thrown out of the spinning outlet during rotation, the receiving crawler belt is composed of a receiving rod and a connecting chain, the prepared materials are all conductive metal, the guide rail is an insulating guide rail, a plurality of devices can be connected in series along the advancing direction of the receiving crawler belt, and two or more devices are connected in series through the receiving crawler belt to carry out continuous spinning. The continuous melting centrifugal electrostatic spinning production equipment can solve the problems of low utilization rate of common equipment and poor length, width and flatness of the obtained fiber membrane.

Description

Continuous melting centrifugal electrostatic spinning production equipment capable of being connected in series along two directions

Technical Field

The invention belongs to the technical field of spinning equipment, and particularly provides continuous melting centrifugal electrostatic spinning production equipment capable of being connected in series along two directions.

Background

With the development of science and technology, the demand of society for nano fibers is continuously increasing. The traditional solution electrostatic spinning process has low yield and low processing speed, while the existing melt spinning production equipment has high yield, high production speed and low production cost, but cannot produce long and continuous fiber membranes due to the limitation of the equipment and only can produce annular fiber membranes with the diameter of an equipment receiving ring. In addition, due to the influence of the flying speed and gravity of the fiber on the flying path of the fiber, the receiving ring cannot be manufactured too large, the plane receiving plate cannot collect a large-width fiber membrane, and the arc receiving plate cannot be used for large-scale mass production of flat fiber membranes, so that the conventional melting centrifugal electrostatic spinning production equipment has the advantages of high yield, high production speed and low production cost, but the fiber membrane has low utilization rate, poor length, width and flatness, and is difficult to perform large-scale post-processing through industrial equipment. Chinese patent CN108486666A describes a centrifugal spinning machine with vertically placed centrifugal discs, but the equipment can only receive flocculent fibers, and cannot prepare continuous fiber membranes. Although the Chinese patent CN210945869U omits a heating structure through friction force, a continuous fiber membrane can not be prepared, and the spinning is more favored. Chinese patents CN105369369A, CN203295674U, CN106149073A describe equipment that can continuously spin to prepare fiber membrane, but the product itself or length, or width, or morphology is limited by the size of the equipment. Chinese patent CN201952531U describes a multilayer spinning structure similar to a tandem, but also fails to produce continuous fiber membranes. The functions of the devices of chinese patent CN105386167A and chinese patent CN105350094A are mainly focused on spinning rather than fiber membranes, wherein although a similar conveyor belt structure is adopted in CN105386167A, the selected conveyor belt structure is not favorable for peeling the whole fiber into a fiber membrane, and the thickness of the fiber membrane of the product is uneven, the width is insufficient, the reprocessing difficulty is high, and the device cannot be electrically connected as a whole, and cannot be used for electrostatic spinning to prepare a fiber membrane, and the fiber membrane needs to be twisted into filaments after preparing superfine fibers, and then the fiber fabric is woven. Chinese patent CN105568403A and this patent have adopted similar omega type track, but because the fibre receives gravity influence, can fall down naturally in flight, and this patent utilizes the fibrous design of wind-force collection probably to lead to the fibre to fly out from omega type track breach, and extra additional fan has increased motor work load, has reduced motor work efficiency, has increased the energy consumption. Chinese patent CN205556862U also describes a centrifugal spiral spinning, but because it has only one feeding inlet, in the continuous spinning process, because the multiple discharging outlets discharge layer by layer and there is no feeding flow in the middle, there is a possibility that the end spinning outlets do not have enough material, resulting in insufficient discharging or that the fiber film thickness is not uniform because the pressure decreases layer by layer although there is material.

Disclosure of Invention

Aiming at the defects, the invention provides continuous melting centrifugal electrostatic spinning production equipment which can be connected in series along two directions, wherein the two directions in series are the advancing direction of a fiber film and the central line direction of a rotating shaft of a throwing disc, the fiber film with large width and high flatness can be continuously produced, and the problems of poor length, width and flatness of the fiber film are solved.

The technical scheme of the invention is as follows:

a continuous melting centrifugal electrostatic spinning production device capable of being connected in series in two directions comprises a throwing disc or a series throwing disc, a receiving crawler, a guide rail, a control console, a temperature measuring probe, a heating disc, a feeding pipe and a motor.

The throwing disc or the series throwing disc is made of pure metal and is externally connected with a negative pole or a positive pole of a high-voltage power supply, and the rotating central shaft of the throwing disc or the series throwing disc is parallel to the horizontal plane; the throwing disc is integrally in a hollow cylinder shape, a certain number of spinning outlets are uniformly distributed on the wall of the cylinder, fluid materials are thrown out from the spinning outlets to form fibers, and a feeding hole is formed above the throwing disc and used for receiving the fluid materials conveyed by the feeding pipe; a connecting port is arranged below the throwing disc and is used for connecting a motor or a secondary connecting port; the throwing discs can be connected in series along the rotating central shaft to form series throwing discs so as to improve the width of a spinning film, and the specific series number and the series throwing disc interval are adjusted according to production requirements and material properties; the serial throwing disc is integrally in a multilayer hollow cylinder shape, a connector is arranged below the serial throwing disc and used for connecting a motor or a next secondary connector, the secondary connector extends out of the feed inlet and is used for connecting a previous serial throwing disc, and the serial connection mode comprises welding, threads, riveting and the like;

the receiving crawler consists of a receiving rod, a receiving rod bracket pulley and a connecting chain, and the preparation materials are all conductive metals and can be externally connected with the positive pole or the negative pole of a high-voltage power supply; the connecting chain runs in the guide rail and is connected with two ends of a connecting receiving rod so as to fix the distance between the receiving rods and simultaneously conduct voltage; the receiving rod is a series of parallel, equidistant, equal-length, equal-diameter and smooth-surface conductive metal rods, each end of the two ends of the receiving rod is fixed through a connecting chain so as to be convenient for transmitting traction force and fixing the distance between guide rails, a receiving rod support for fixing the receiving rod and a receiving rod support pulley for reducing friction are additionally arranged at the two ends of the receiving rod, and the specific distance, length and diameter of the receiving rod are adjusted according to the production condition and the number of serially-connected throwing discs; the receiving crawler belt advances along the guide rail at a constant speed, can be connected end to end, circularly moves in the guide rail, and can also be recovered at the tail end for recycling;

the guide rail is an insulated guide rail to avoid direct connection of voltage and the ground, a plurality of sections of guide rails are connected in series along the advancing direction of the receiving crawler, the opening of the guide rail is upward to provide space for a temperature measuring probe and a charging hole, the guide rail is fixed on a horizontal plane by an insulated support, and the width of the guide rail is adjusted according to the specific production requirements; the insulating guide rail ensures that an electrostatic field can be generated between the receiving crawler and the throwing disc;

the console is internally provided with a motor controller and a temperature controller, the motor controller adjusts the rotating speed of the motor, the temperature controller receives a signal returned by the temperature measuring probe and outputs the signal to the heating plates, the materials are heated to a molten state, a plurality of sets of heating plates corresponding to the series-connected throwing plates can be respectively controlled, the feeding speed of each independent feeding pipe is controlled, and stable and continuous feeding is ensured;

the temperature measuring probes are fixed on the outlet of the feeding pipe, penetrate into the throwing disc and directly contact the throwing disc, the connecting wire bypasses the guide rail to avoid high-voltage short circuit, the temperature measuring probes can be connected in parallel by matching with the series throwing disc, and each temperature measuring probe independently receives signals and transmits the signals back to the temperature controller in the console;

the heating plate is internally provided with an electromagnetic heating coil, a heating plate bracket is made of insulating materials and is connected to a control console to support the heating plate, the electromagnetic heating coil is connected to the control console through an electromagnetic heating coil control line, the heating flail plate is controlled by the control console to heat materials in the flail plate to a molten state, the heating plate is internally provided with a bearing, a support motor rotating shaft conducts power to the flail plate or the flail plates connected in series, the heating plates are matched with the flail plates to be connected in series along a rotating central shaft, and each heating plate receives signals from a controller to be independently controlled; when the heating plate is not heated or the electromagnetic heater is not powered, normal-temperature continuous solution centrifugal spinning can be carried out; the high-voltage power supply is turned off to carry out static-free centrifugal spinning;

the material of the feeding pipe is an insulating temperature-resistant material, extends into the throwing disc along the opening of the throwing disc to supply materials for the throwing disc, and can be matched with the throwing discs connected in series to be connected in parallel along a rotating central shaft, and each feeding pipe supplies materials independently;

the motor provides power for the throwing disk, and the throwing disk or the series throwing disk is driven to rotate through the rotating shaft of the motor.

The invention has the beneficial effects that: the patent track is matched with the continuously advancing receiving crawler belt, so that continuous spinning can be effectively carried out, the acceptance rate of the receiving crawler belt is ensured to the maximum extent, and meanwhile, large-width uniform centrifugal spinning fiber membranes are collected under the working state of a plurality of series throwing discs; the plane formed by throwing the fibers is vertical to the ground, so that the influence of gravity on the flying direction of the fibers can be reduced to the maximum extent; aiming at a series of equipment formed by connecting spinning disks in series along the rotating central axis direction of the series spinning disk, the spinning areas of the spinning disks are mutually covered, the condition that the middle of a spinning fiber film is thick and the two sides of the spinning fiber film are thin can be avoided, and the problems that the width of a product of the traditional melting centrifugal electrostatic spinning production equipment is not enough and the fiber film is not a planar film are solved; aiming at equipment formed by connecting in series along the direction of a guide rail, a plurality of throwing discs independently feed materials, and the spinning is repeated for multiple times, so that the thickness of a fiber film can be increased, and different materials are added into different throwing discs to prepare composite fiber films with different fibers doped with each other.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a schematic view of a rear right direction apparatus

FIG. 2 is a schematic view of a left front direction apparatus

FIG. 3 is a schematic cross-sectional view of a heating plate

FIG. 4 is a schematic view of a spinning disk structure

FIG. 5 is a schematic view of a serial flail disk structure

FIG. 6 is a side view of the receiving track moving in the track, viewed in the direction of the axis of rotation of the swing disk, in a side view, in which the direction of the large arrow is the advancing direction of the receiving track and the direction of the small arrow is the rolling direction of the receiving bar support pulley

FIG. 7 is a top plan view of the receiving track in the track, viewed vertically down and perpendicular to the ground, with the large arrow pointing in the forward direction of the receiving track and the small arrow pointing in the rolling direction of the receiving bar support sheaves

FIG. 8 is a schematic view of a single set of spinning equipment connected in series along the advancing direction of a receiving track

FIG. 9 is a schematic view of a heating plate in series with a series flail plate along a central axis of rotation

In the figure, a throwing disc or a series throwing disc 1, a receiving crawler 2, a guide rail 3, a control console 4, a temperature measuring probe 5, a heating disc 6, a feeding pipe 7, a motor 8, a receiving rod 9, a heating disc support 10, a motor data wire 11, a guide rail support 12, a feeding hole 13, a spinning outlet 14, a connecting port 15, a secondary connecting port 16, a bearing 17, a motor rotating shaft 18, a receiving rod support 19, a receiving rod support pulley 20, a connecting chain 21, an electromagnetic heating coil 22 and an electromagnetic heating coil control wire 23 are arranged in series.

Detailed Description

The embodiment of the invention discloses a melting centrifugal electrostatic spinning production device, which is used for effectively solving the problems of poor length, width and flatness of a common centrifugal spinning fiber membrane.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

in fig. 1, the diameter of the arc area of the guide rail is 21 cm, the diameter of the throwing disc is 9 cm, the receiving rod support is made of an X-shaped insulating material, the connecting chain is made of a thin iron wire, the receiving crawler belt is pulled to advance through power provided by the motor, each receiving rod is connected, a control console heating switch is turned on, the throwing disc is heated to 200 ℃, the high-speed motor is started, the rotating speed is set to be 1500 revolutions per minute, the guide rail is started after the temperature is stable, the advancing speed is set to be 0.1 m/s, and the receiving rod support is externally connected with 20kV voltage.

In the spinning process, the heating disc heats the throwing disc firstly, the console obtains temperature-related data through the temperature measuring probe, the temperature is suitable for injecting solid or molten materials into the throwing disc through the feeding pipe after spinning, simultaneously, the motor and the receiving crawler are started, the receiving crawler is made of stainless steel and moves forwards in the omega-shaped guide rail with an upward opening, and because the spinning fibers have certain length, the fiber is received by the receiving rod on the receiving crawler, and the fiber at the opening is directly broken due to the lower strength and the smaller quantity of the single fiber, meanwhile, the heating plate continuously heats the throwing plate to keep the temperature, the receiving crawler belt forwards conveys the fibers collected on the receiving rod while moving forwards along the guide rail, and continuously receive more fibers in the conveying process, so that the original independent fibers are mutually overlapped to form a thinner fiber film, and the fiber film is continuously thickened to form fiber cloth with certain mechanical strength. Because the plane formed by throwing the fibers out is vertical to the ground, the influence of gravity on the flying direction of the fibers can be reduced to the maximum extent; for equipment formed by connecting spinning areas of a plurality of throwing disks in series along the rotating central shaft direction of the throwing disks, the spinning areas of the throwing disks are mutually covered, the condition that the middle of a spinning fiber film is thick and the two sides of the spinning fiber film are thin can be avoided, and the problems that the width of a product of the traditional melting centrifugal electrostatic spinning production equipment is not enough and the fiber film is not a planar film are solved; aiming at equipment formed by connecting a plurality of throwing discs in series along the direction of a guide rail, a plurality of throwing discs independently feed materials and repeatedly spin for a plurality of times, so that the thickness of a fiber film can be increased on one hand, and different materials are added into different throwing discs on the other hand to prepare composite fiber films with different fibers doped with each other.

The invention is not the best known technology.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A continuous melting centrifugal electrostatic spinning production device capable of being connected in series along two directions is characterized in that: the device comprises a throwing disc or a series throwing disc, a receiving crawler belt, a guide rail, a control console, a temperature measuring probe, a heating disc, a feeding pipe and a motor, wherein the throwing disc or the series throwing disc is made of pure metal and is externally connected with a negative pole or a positive pole of a high-voltage power supply, and a rotating central shaft of the throwing disc or the series throwing disc is parallel to a horizontal plane; the throwing disc is integrally in a hollow cylinder shape, a certain number of spinning outlets are uniformly distributed on the wall of the cylinder, fluid materials are thrown out from the spinning outlets to form fibers, and a feeding hole is formed above the throwing disc and used for receiving the fluid materials conveyed by the feeding pipe; a connecting port is arranged below the throwing disc and is used for connecting a motor or a secondary connecting port; the throwing discs can be connected in series along the rotating central shaft to form a series throwing disc so as to improve the width of a spinning film; the serial throwing disc is integrally in a multilayer hollow cylinder shape, a connector is arranged below the serial throwing disc and used for connecting a motor or a next secondary connector, the secondary connector extends out of the feed inlet and is used for connecting a previous serial throwing disc, and the serial connection mode comprises welding, threading and riveting;

the receiving crawler consists of a receiving rod, a receiving rod bracket pulley and a connecting chain, and the preparation materials are all conductive metals and can be externally connected with the positive pole or negative pole spinning of a high-voltage power supply; the connecting chain runs in the guide rail and is connected with two ends of a connecting receiving rod so as to fix the distance between the receiving rods and simultaneously conduct voltage; the receiving rod is a series of parallel, equidistant, equal-length, equal-diameter and smooth-surface conductive metal rods, each end of the two ends of the receiving rod is fixed through a connecting chain to conduct traction force and fix the distance between the guide rails, and a receiving rod support for fixing the receiving rod and a receiving rod support pulley for reducing friction are additionally arranged at the two ends of the receiving rod; the receiving crawler belt advances along the guide rail at a constant speed, can be connected end to end, circularly moves in the guide rail, and can also be recovered at the tail end for recycling;

the guide rail is an insulated guide rail, a plurality of sections of guide rails are connected in series along the advancing direction of the receiving crawler, the opening of the guide rail is upward to provide space for the temperature measuring probe and the charging hole, the guide rail is fixed on a horizontal plane by an insulated support, and the width of the guide rail is adjusted as required;

the temperature measuring probes are fixed on the outlet of the feeding pipe, penetrate into the throwing disc and directly contact the throwing disc, the connecting wire bypasses the guide rail and is matched with the series throwing disc to connect the plurality of temperature measuring probes in parallel, and each temperature measuring probe independently receives signals and transmits the signals back to the temperature controller in the console;

the heating plate is internally provided with an electromagnetic heating coil, a heating plate bracket is made of insulating materials and is connected to a control console, the electromagnetic heating coil is connected to the control console through an electromagnetic heating coil control line, the control console controls and heats the throwing plate to heat materials in the throwing plate to a molten state, the heating plate is internally provided with a bearing, a rotating shaft of a support motor transmits power to the throwing plate or the throwing plates connected in series, the heating plates are matched with the throwing plates to be connected in series along a rotating central shaft, and each heating plate receives a signal from a temperature controller to carry out independent control; when the heating plate is not heated or the electromagnetic heater is not powered, normal-temperature continuous solution centrifugal electrostatic spinning can be carried out; the high-voltage power supply is turned off to carry out static-free centrifugal spinning;

the feeding pipes are made of insulating temperature-resistant materials, extend into the throwing disc along the opening of the throwing disc to supply materials for the throwing disc, and can be matched with the throwing discs connected in series to be connected in parallel along a rotating central shaft, and each feeding pipe supplies materials independently;

the motor drives the throwing disc or the series throwing disc to rotate through the rotating shaft of the motor.