Efficient waste chopped fiber recovery and utilization device

Abstract

The utility model discloses an efficient waste chopped fiber recovery and utilization device. The efficient waste chopped fiber recovery and utilization device comprises an upper-layer plate, a lower-layer plate parallel to the upper-layer plate, and nylon studs (4) arranged between the upper-layer plate and the lower-layer plate, the dielectric layer is arranged on the side, close to the upper conductive electrode, between the two parallel electrode plates, short fibers are pulled and adsorbed by means of the polarization characteristic of the dielectric, and polarity reversal caused by direct contact between the fibers and the conductive electrodes is ingeniously avoided. By increasing the input voltage of the high-voltage power supply, the emission process of the fibers can be realized, on one hand, the whole operation process is simplified, and on the other hand, short fiber pollution caused by introduction of a liquid phase is avoided.

Description

Technical Field

[0001] The utility model relates to the field of waste recycling and reuse, in particular to a highly efficient waste chopped fiber recycling and utilization device. Background Art

[0002] Carbon fiber reinforced polymers (CFRPs) are widely used in industry due to their outstanding mechanical properties. However, the rapid growth of CFRP production is generating a large amount of waste, such as scraps from industrial production processes and discarded carbon fiber products. By 2025, global CFRP waste is expected to increase to 20,000 tons per year, posing a serious environmental problem. The recycling of this carbon fiber waste produces a large amount of chopped carbon fibers. However, chopped carbon fibers spontaneously agglomerate in their free state, making them difficult to recycle. Furthermore, studies have shown that fibrous materials are more toxic to the respiratory system than spherical particles of the same chemical composition. This chopped carbon fiber waste can significantly pollute the industrial operating environment.

[0003] Currently, the main method for recycling these chopped fibers is electrostatic flocking technology. This device includes high-voltage electrodes and a flocking workbench. By placing the plastic part on the workbench of the flocking machine, adding the fluff to the flocking machine, and starting the flocking machine, the fluff is ejected from the nozzle under the action of the high-voltage electrostatic field and adheres vertically to the surface of the plastic part. The electrostatic flocking device disclosed above can be applied to various short fiber materials, including carbon fiber, but it requires pretreatment of the fluff, which is a time-consuming process and also involves the introduction of liquid dispersants, which affects the quality of the fluff.

[0004] The current dispersion pretreatment methods for short fibers are mainly divided into two parts: gas phase and liquid phase dispersion. Many technologies for fiber dispersion in liquid phase have been developed, such as rotor / stator centrifugal dispersion, which can achieve fiber disaggregation and dispersion in liquid phase. In addition, the relative dispersion volume can be increased by more than 5 times by agglomerating fibers in a high compression ratio fluid. In the gas phase, existing fiber dispersion methods still require external mechanical force to overcome the van der Waals force that causes agglomeration. For example, a typical polar solvent combined with membrane filtration method takes a total of about 860 minutes to disperse the fibers, and a typical ball milling process completely disperses 2mm fiber agglomerates into 300μm single fibers, which causes fiber breakage.

[0005] Therefore, it is necessary to design a device with a simpler and more reliable structure, which can not only evenly disperse and sort the agglomerated chopped fibers, but also avoid the liquid dispersant from contaminating the raw materials and improve the efficiency of chopped carbon fiber recovery and transfer, which will greatly help the waste recycling and reuse of carbon fiber reinforced polymers and environmental protection. Utility Model Content

[0006] The purpose of the utility model is to provide an efficient waste chopped fiber recovery and utilization device, which solves the problems mentioned in the background technology.

[0007] The utility model is achieved as follows: a high-efficiency waste chopped fiber recovery and utilization device comprises: an upper plate, a lower plate arranged parallel to the upper plate, and nylon studs arranged between the upper plate and the lower plate; the upper glass fiber substrate and the lower glass fiber substrate are placed parallel to each other, connected by nylon studs and maintained at a certain distance, and the distance can be controlled by adjusting the number of nylon studs; the device can efficiently separate short fiber pellets in an atmospheric environment, and adsorb the short fibers on the surface of a dielectric layer, and complete the flocking process by emitting them to the surface of a target material through an electrostatic field, which is beneficial to improving the recovery and utilization efficiency of harmful short fibers.

[0008] A further technical solution of the present invention is: the upper plate includes: an upper glass fiber substrate, an upper conductive electrode arranged on the upper glass fiber substrate, and a dielectric layer, the dielectric layer is located below the upper conductive electrode; the dielectric layer is connected to the upper conductive electrode through an ultra-thin copper conductive tape and is replaceable; the upper conductive electrode is connected to a high-voltage DC power supply, and the lower plate is grounded.

[0009] A further technical solution of the present invention is: the upper glass fiber substrate is provided with an upper groove for installing the upper conductive electrode and the dielectric layer, the glass fiber substrate has a stepped upper groove in the center, a square space for accommodating the electrode and the dielectric plate is provided in the center, and holes and grooves are provided around it.

[0010] A further technical solution of the present invention is that the upper conductive electrode is electrically connected to an external high-voltage DC power supply, is made of a high-conductivity material, is tightly connected to the insulating dielectric, and is loaded into the upper slot of the upper glass fiber substrate.

[0011] A further technical solution of the present invention is that the dielectric layer is connected to the upper conductive electrode via an ultra-thin copper conductive tape, and the dielectric layer is detachable.

[0012] A further technical solution of the present invention is that the lower plate includes: a lower glass fiber substrate, a lower conductive electrode arranged on the lower glass fiber substrate, and the lower electrode plate is aligned with the upper conductive electrode and loaded in the lower groove of the lower glass fiber substrate.

[0013] A further technical solution of the present invention is that: a lower slot for mounting the lower conductive electrode is provided on the lower glass fiber substrate.

[0014] A further technical solution of the present invention is: the lower conductive electrode is connected to the external grounding electrode, the lower conductive electrode is fixed in the lower slot of the lower glass fiber substrate, connected to the grounding electrode, and is used to place short fibers for dispersion and target materials for implantation.

[0015] Beneficial effects of the utility model: The efficient waste chopped fiber recovery and utilization device of the utility model has the following advantages:

[0016] 1. This invention incorporates a dielectric layer between two parallel electrode plates, located near the upper conductive electrode. This layer utilizes the polarization characteristics of the dielectric to pull and absorb short fibers, cleverly avoiding polarity reversal caused by direct contact between the fibers and the conductive electrode. By increasing the input high-voltage power supply voltage, the fiber launch process can be achieved, simplifying the entire process while avoiding short fiber contamination caused by the introduction of a liquid phase.

[0017] 2. The present invention provides holes and grooves on the glass fiber substrate that carries the electrodes. This not only allows the electrode plates and dielectric layers to be fixed in place by stacking, but also increases the creepage distance, thereby avoiding spark discharges caused by high voltage input and improving the safety of the device.

[0018] 3. The fiberglass substrates of the present invention are connected by insulating nylon studs. The distance between the fiberglass substrates can be changed by controlling the number of nylon studs, thereby reducing the overall cost and improving the flexibility of the assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the overall structural diagram of a highly efficient waste chopped fiber recovery and utilization device provided by the utility model;

[0020] Figure 2 This is a structural diagram of the collection and emission area of a highly efficient waste chopped fiber recovery and utilization device provided by the utility model;

[0021] Figure 3 This is a structural diagram of the raw material and target material loading area of a highly efficient waste chopped fiber recovery and utilization device provided by the utility model;

[0022] Figure 4 This is a structural diagram of upper and lower glass fiber base plates of a highly efficient waste chopped fiber recovery and utilization device provided by the utility model.

[0023] Reference numerals: 1 - upper glass fiber substrate, 2 - upper conductive electrode, 3 - dielectric layer, 4 - nylon stud, 5 - lower glass fiber substrate, 6 - lower conductive electrode. DETAILED DESCRIPTION

[0024] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention.

[0025] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for understanding and reading by those familiar with this technology, and are not used to limit the conditions for implementation of the present invention. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose of the present invention. At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should also be considered as the scope of implementation of the present invention without substantially changing the technical content.

[0026] Example 1: Figures 1-4 An efficient waste chopped fiber recycling and utilization device is shown. The efficient waste chopped fiber recycling and utilization device includes: an upper plate, a lower plate arranged parallel to the upper plate, and a nylon stud 4 arranged between the upper and lower plates; the upper plate includes: an upper glass fiber substrate 1, an upper conductive electrode 2 arranged on the upper glass fiber substrate 1, and a dielectric layer 3; the upper glass fiber substrate 1 is provided with an upper slot for mounting the upper conductive electrode 2 and the dielectric layer 3; the upper conductive electrode 2 is electrically connected to an external high-voltage DC power supply; the dielectric layer 3 is connected to the upper conductive electrode 2 via an ultra-thin copper conductive tape, and the dielectric layer 3 is removable; the lower plate includes: a lower glass fiber substrate 5, and a lower conductive electrode 6 arranged on the lower glass fiber substrate 5; the lower glass fiber substrate 5 is provided with a lower slot for mounting the lower conductive electrode 6; and the lower conductive electrode 6 is connected to an external grounding electrode.

[0027] The upper glass fiber substrate 1 has a groove dug in the center to fix the upper conductive electrode 2 and the dielectric layer 3. The dielectric 3 is tightly combined with the upper conductive electrode 2 through an ultra-thin copper conductive tape to disperse, absorb and emit chopped fibers.

[0028] The upper glass fiber substrate 1 and the lower glass fiber substrate 5 are connected and separated by nylon studs 4 , and the distance between the upper glass fiber substrate 1 and the lower glass fiber substrate 5 can be adjusted by controlling the number of nylon studs 4 .

[0029] The lower glass fiber substrate 5 has a groove in the center to fix the lower conductive electrode 6 for carrying chopped fiber raw materials and various types of implanted targets.

[0030] The collection and emission area consists of an upper glass fiber substrate 1, an upper conductive electrode 2, and a dielectric layer 3; the raw material and target loading area consists of a lower glass substrate 5 and a lower conductive electrode 6; a stepped groove is provided in the center of the upper and lower glass fiber substrates for fixing the conductive electrode and the dielectric layer.

[0031] Working steps:

[0032] 1. Place the chopped fiber mass to be dispersed and recovered on the surface of the lower conductive electrode 6;

[0033] 2. Turn on the high-voltage power supply switch and adjust the output voltage of the high-voltage power supply according to the actual situation;

[0034] 3. An electrostatic field is generated by parallel conductive electrodes. The chopped fibers on the surface of the lower conductive electrode 6 are induced to be charged and move toward the dielectric layer 3, where they are dispersed and adsorbed on the surface of the dielectric layer.

[0035] 4. Turn off the high voltage power supply and place the target material to be implanted on the surface of the lower conductive electrode 6;

[0036] 5. Turn on the high-voltage power supply to provide a higher voltage. The chopped fibers on the surface of the dielectric layer are contact-charged and move at high speed toward the target material on the surface of the conductive electrode 6.

[0037] 6. After flocking is completed, turn off the high voltage power supply, replace the discarded chopped fiber raw materials, and repeat steps 1-5 until all the discarded chopped fiber raw materials are recovered and implanted.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An efficient waste chopped fiber recovery and utilization device, characterized in that: The high-efficiency waste chopped fiber recycling and utilization device comprises: an upper plate, a lower plate arranged parallel to the upper plate, and a nylon stud (4) arranged between the upper plate and the lower plate; the upper plate comprises: an upper glass fiber substrate (1), an upper conductive electrode (2) arranged on the upper glass fiber substrate (1), and a dielectric layer (3); the upper glass fiber substrate (1) is provided with an upper slot for installing the upper conductive electrode (2) and the dielectric layer (3); the upper conductive electrode (2) is electrically connected to an external high-voltage direct current power supply; the dielectric layer (3) is connected to the upper conductive electrode (2) via an ultra-thin copper conductive tape, and the dielectric layer (3) is detachable; the lower plate comprises: a lower glass fiber substrate (5), and a lower conductive electrode (6) arranged on the lower glass fiber substrate (5).

2. The efficient waste chopped fiber recovery and utilization device according to claim 1, characterized in that: The lower glass fiber substrate (5) is provided with a lower slot for mounting the lower conductive electrode (6).

3. The efficient waste chopped fiber recovery and utilization device according to claim 2, characterized in that: The lower conductive electrode (6) is connected to an external grounding electrode.

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