Device and method for tightly and efficiently arranging composite glass fibers

Abstract

The invention relates to a device and a method for tightly and efficiently arranging composite glass fibers, the device comprises a plate arranging mold, multifilament fibers are placed in the plate arranging mold, the plate arranging mold is placed on an electromagnetic vibration table, and the electromagnetic vibration table is connected with a controller. And a magnifying lens connected with the display screen is arranged above the plate arranging mold. The method comprises the steps that multifilament fibers are put into a plate arranging mold for blank plate arrangement, a controller is started when 4-6 layers are arranged every time, an electromagnetic vibration table is made to vibrate, the plate arranging mold is driven to vibrate up and down at the set frequency and amplitude for preset time, the multifilament fibers are vibrated at a certain frequency, the position is adjusted, and a close packing state is achieved; and the blank plate structure is displayed in real time through a display screen connected with the magnifying lens, after the current blank plate structure is adjusted, the controller is turned off, and the multifilament fiber row plate continues to be placed in. By means of the arrangement device and method, the phenomena of multifilament fiber dislocation and structure holing can be reduced, the internal cleanliness of the blank plate is improved, and the plate discharging efficiency is improved.

Description

A device and method for tightly and efficiently arranging composite glass fibers Technical Field

[0001] This invention relates to the field of microchannel plate technology, and in particular to an apparatus and method for tightly and efficiently arranging composite glass fibers. Background Technology

[0002] Microchannel plates (MCPs) are secondary electron multiplier devices composed of millions of channels. Due to their unique gain, noise, spatial resolution, and temporal resolution characteristics, they have become core devices in photon, electron, and ion detection and image enhancement / weak light signal amplification. They have very important applications in low-light night vision, ultraviolet detection, nuclear detection, space detection, high-energy physics, and radiation diagnosis and treatment.

[0003] MCP fabrication mainly involves processes such as glass rod and tube assembly, drawing monofilaments, arranging multifilament rods, drawing multifilaments, arranging preforms, hot-melt pressing, optical processing, and physical and chemical treatment. Among these, the preparation of the MCP preform is crucial. The glass fiber multifilaments required for preform arrangement are typically hexagonal or tetragonal, with each multifilament composed of thousands of monofilaments arranged together. The multifilament size is usually less than 1 millimeter, with precision controllable at the micrometer level. Taking a hexagonal multifilament preform as an example, the hexagonal multifilaments are in a tightly packed state during the arrangement process. The boundaries and vertices of each multifilament are closely attached to adjacent multifilaments, and the boundary monofilaments of adjacent multifilaments are also tightly packed. However, due to the small size of the multifilaments, the entire preform arrangement process is done manually. Each multifilament needs to be manually pressed into place, and excessive contact with the multifilaments can easily introduce impurities such as dust and glass fragments. These impurities adhere to the surface of the multifilaments, severely affecting the structure and performance of the preform. Meanwhile, misalignment can easily occur between the multifilaments, preventing them from reaching the densest packing. In severe cases, this can even lead to holes at the apex of the multifilaments, resulting in substandard billet structure. In the final product stage, linear structures and bright spots caused by these holes can be clearly observed, significantly reducing the quality of MCP imaging. Furthermore, each billet is composed of thousands of multifilaments, making manual operation time-consuming and labor-intensive, and introducing many uncertainties. This makes it difficult to guarantee a stable billet yield and also hinders efficiency in mass production. Summary of the Invention

[0004] The main objective of this invention is to provide a device for tightly and efficiently arranging composite glass fibers to reduce multifilament misalignment and structural voids and improve board production efficiency.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A device for tightly and efficiently arranging composite glass fibers includes a arranging mold for placing multifilament fibers, the arranging mold being placed on an electromagnetic vibration table, the electromagnetic vibration table being connected to a controller for controlling the electromagnetic vibration table to vibrate according to a set frequency, amplitude, and time.

[0007] A magnifying glass is provided above the slab die, and the magnifying glass is connected to a display screen, which can display the structure of the blank slab formed by the arrangement of multifilament fibers in real time.

[0008] The present invention also provides a method for tightly and efficiently arranging composite glass fibers using the aforementioned device, comprising the following steps:

[0009] (1) Place the arranging mold on the surface of the electromagnetic vibration table, put multifilament fibers into the arranging mold to arrange the blanks, and set a preset number of layers for each arrangement. Turn on the controller, and after the electromagnetic vibration table receives the signal, it drives the arranging mold to vibrate up and down for a preset time at a set frequency and amplitude. The vibration of the arranging mold then drives the multifilament fibers inside to vibrate and adjust their positions, filling the excess space inside the arranging mold so that all the multifilament fibers reach a tightly packed state.

[0010] (2) Display the blank structure in real time through the display screen connected to the magnifying glass, observe the arrangement of multifilament fibers in the display screen, and turn off the controller after observing that the multifilament fibers are arranged neatly to complete the adjustment;

[0011] (3) After the current blank structure is adjusted, add multifilament fibers into the plate-laying mold and continue the plate-laying in steps (1) and (2) until a blank with a complete structure is obtained.

[0012] Furthermore, it also includes:

[0013] When the blanks are arranged to the top layer, the positions of the four multifilament fibers on both sides of the top layer are left empty to form gaps. After the blanks are arranged, elastic coils are first used to wrap around the side of the blanks to fix the piled multifilament fibers. Then, a metal wire with stable thermal properties is selected and wrapped around the side of the blanks. The wire is knotted and fixed in the gap at the top of the blanks, and the excess metal wire is placed in the gap.

[0014] The metal wire is either Cr20Ni80 hot-dip galvanized wire or copper wire.

[0015] The frequency is 20-100Hz, the amplitude is 0.1-5mm, the time is 5-10min, and the preset number of layers is 4-6.

[0016] The multifilament fibers also include the following processing steps before being arranged:

[0017] (1) The multifilament fibers are separated and fixed on the microfiber separation and fixing device, and then the long fiber filaments are cut into short fiber filaments of the required length using a tungsten carbide knife;

[0018] (2) Use a micrometer to measure the front, middle and back of the short fiber filaments, compare them with the standard filament diameter, and then classify and place them according to different accuracy ranges.

[0019] (3) Transfer the multifilament fibers that meet the accuracy requirements to the glass fiber cleaning device and clean them ultrasonically with ethanol solution;

[0020] (4) Dry the ultrasonically cleaned multifilament fibers in a vacuum oven.

[0021] The ultrasonic cleaning includes: ultrasonic cleaning at a frequency of 120 Hz for 30-60 minutes, followed by ultrasonic cleaning at a frequency of 40 Hz for 30-60 minutes, with the ultrasonic cleaning temperature being room temperature; the drying temperature is 60-80 ℃, and the drying time is 30-60 minutes.

[0022] The present invention also provides a blank plate, which is obtained by arranging according to the method described above.

[0023] The present invention further provides an application of the aforementioned blank plate in the preparation of microchannel plates.

[0024] By employing the above technical solution, the present invention has at least the following advantages:

[0025] The electromagnetic vibration plate-laying method designed in this invention allows for stepless adjustment of vibration frequency and amplitude, with a maximum frequency of 600Hz and an amplitude range of 0.1-5mm, suitable for preparing MCP blanks of different sizes. This invention uses vibration placement, avoiding manual pressing and significantly reducing the introduction of impurities between multifilament fibers. The defect rate caused by excess material between multifilament fibers has been reduced from over 25% to less than 10%, resulting in a significant improvement in the cleanliness of the blanks.

[0026] The blank structure designed in this invention provides ample space for the use of wire-bundled plates without affecting the effective area of ​​the MCP, reducing multifilament fiber misalignment and structural holes, significantly increasing the stress uniformity of the blank during the hot-melt pressing process, and ensuring orderly arrangement of multifilament fibers and uniform overall plate structure. Using this invention to prepare MCP blanks can improve the overall structural uniformity of the MCP, enhance the orderly arrangement of channels at the boundaries between different multifilament fibers, and improve the cleanliness of the microchannel plate, thereby improving the imaging quality of the MCP.

[0027] The plate arrangement method designed in this invention simplifies the plate arrangement process, reduces manual operation, improves plate quality, and can shorten the arrangement time of a single blank by at least 15%, effectively improving the efficiency of blank preparation.

[0028] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0029] Figure 1 is a schematic diagram of the structure of a device for tightly and efficiently arranging composite glass fibers according to an embodiment of the present invention;

[0030] Figure 2 is a schematic diagram of the structure of the hexagonal blank provided in an embodiment of the present invention.

[0031] In the diagram: 1. Controller; 2. Magnifying glass; 3. Display screen; 4. Multifilament fiber; 5. Panelization mold; 6. Electromagnetic vibration table. Detailed Implementation

[0032] To further illustrate the technical means and effects adopted by the present invention to achieve its intended purpose, the specific implementation methods, structures, features, and effects of the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "embodiments" or "embodiments" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0033] As shown in Figure 1, a device for tightly and efficiently arranging composite glass fibers includes a arranging mold 5, in which multifilament fibers 4 are placed. The arranging mold 5 is placed on an electromagnetic vibration table 6, which is connected to a controller 1. The controller 1 is used to control the electromagnetic vibration table 6 to vibrate according to a set frequency, amplitude, and time.

[0034] Preferably, a magnifying glass 2 is provided above the slab mold 5, and the magnifying glass 2 is connected to the display screen 3. The display screen 3 can display the blank structure formed by the arrangement of multifilament fibers 4 in real time.

[0035] The present invention also provides a method for tightly and efficiently arranging composite glass fibers using the aforementioned device, comprising the following steps:

[0036] (1) Place the slab mold on the surface of the electromagnetic vibration table, put multifilament fibers into the slab mold for slab arrangement, and turn on the controller every 4-6 layers to make the electromagnetic vibration table vibrate. After receiving the signal, the electromagnetic vibration table drives the slab mold to vibrate up and down at the set frequency and amplitude for a preset time. The vibration of the slab mold then drives the multifilament fibers inside to vibrate and adjust their positions. When the multifilament fibers are subjected to a certain frequency of vibration, they will automatically and orderly arrange themselves in a uniform state, continuously adjust their positions and eventually occupy the extra space inside, so that all the multifilament fibers reach a dense stacking state.

[0037] (2) Display the blank structure in real time through the display screen connected to the magnifying glass, observe the arrangement of multifilament fibers in the display screen, and when the multifilament fibers are observed to be arranged neatly and in a densely packed state, turn off the controller to complete the adjustment;

[0038] (3) After the current blank structure is adjusted, add multifilament fibers into the plate-laying mold; continue the plate-laying in steps (1) and (2) until the blank is obtained.

[0039] Furthermore, it also includes:

[0040] When the blanks are arranged to the top layer, the positions of the four multifilament fibers on both sides of the top layer are left empty to form gaps. After the blanks are arranged, elastic coils are first wound around the sides of the blanks to fix the piled multifilament fibers. Then, a metal wire with stable thermal properties is selected and wound around the sides of the blanks. The wire is knotted and fixed in the gap at the top of the blanks, and the excess metal wire is placed in the gaps. This reduces the local side effects generated by the metal wires during the hot-melt pressing process and avoids the multifilament fibers from being misaligned or even having holes in the blanks due to uneven stress.

[0041] Preferably, the metal wire is a Cr20Ni80 hot-dip galvanized wire or a copper wire.

[0042] Preferably, the frequency is 20-600Hz, more preferably 20-100Hz, the amplitude is 0.1-5mm, more preferably 0.1-1.0mm, and the time is 5-10min.

[0043] The multifilament fibers also include the following processing steps before being arranged:

[0044] (1) The multifilament fibers are separated and fixed on the microfiber separation and fixing device, and then the long fiber filaments are cut into short fiber filaments of the required length using a tungsten carbide knife.

[0045] (2) Use a micrometer to measure the front, middle and back of the short fiber filaments, compare them with the standard filament diameter, and then classify and place them according to different accuracy ranges.

[0046] (3) Transfer the multifilament fibers that meet the accuracy requirements to the glass fiber cleaning device and clean them ultrasonically with ethanol solution;

[0047] (4) Dry the ultrasonically cleaned multifilament fibers in a vacuum oven.

[0048] The ultrasonic cleaning includes: ultrasonic cleaning at a frequency of 120 Hz for 30-60 minutes, followed by ultrasonic cleaning at a frequency of 40 Hz for 30-60 minutes, with the ultrasonic cleaning temperature being room temperature; the drying temperature is 60-80 ℃, and the drying time is 30-60 minutes.

[0049] The present invention also provides a blank plate, which is obtained by arranging according to the method described above.

[0050] The present invention further provides an application of the aforementioned blank plate in the preparation of microchannel plates.

[0051] This invention, by employing a vibration-assisted plate-laying method, using stable binding materials, and optimizing the MCP plate-laying structure, can significantly improve the cleanliness and plate-making efficiency of MCP blanks, enhance the structural uniformity of MCPs, and thus improve the imaging quality of MCPs.

[0052] The present invention will be further illustrated below through specific embodiments:

[0053] Example 1

[0054] A method for tightly and efficiently arranging composite glass fibers includes the following steps:

[0055] (1) The multifilament fibers are separated and fixed on the microfiber separation and fixing device to avoid wear during the cutting and handling of multifilament fibers. Then, the long fiber filaments are cut into short fiber filaments of the required length using a tungsten carbide knife.

[0056] (2) Use a micrometer to measure the front, middle and back of the short fiber filaments, compare them with the standard filament diameter, and then classify and place them according to different accuracy ranges to avoid excessive deviation in the size of the multifilament fibers, which would prevent them from being tightly stacked when arranged.

[0057] (3) Transfer the multifilament fibers that meet the accuracy requirements to the glass fiber cleaning device, use ethanol solution for ultrasonic cleaning, perform ultrasonic cleaning at a frequency of 120Hz for 30 minutes, and then perform ultrasonic cleaning at a frequency of 40Hz for 30 minutes. Keep the ultrasonic environment at room temperature.

[0058] (4) Bake the ultrasonically cleaned multifilament fibers at 60°C for 30 minutes in a vacuum oven.

[0059] (5) Optimize the plating process: Place the plating mold on the surface of the electromagnetic vibration table, and use the dried multifilament fibers to arrange the plating blanks. Arrange 5 layers at a time, set the vibration frequency to 80Hz, the amplitude to 0.5mm, and the vibration time to 8min. Turn on the controller. After the electromagnetic vibration table receives the signal, it drives the plating system to vibrate up and down. The vibration of the plating mold then drives the multifilament fibers inside to vibrate. When the multifilament fibers are subjected to a certain frequency of vibration, they will automatically and orderly arrange themselves in a unified state in the up, down, left and right, constantly adjusting their positions and eventually occupying the excess space inside, so that all the multifilament fibers reach a dense stacking state.

[0060] (6) The blank structure can be displayed in real time through the display screen connected to the magnifying glass. The arrangement of multifilament fibers in the display screen can be observed, that is, the blank structure can be observed. When the multifilament fibers are observed to be arranged neatly, the controller can be turned off. After the controller is turned off, if the multifilament fibers are observed to be misaligned through the display screen, the controller can be turned on again for adjustment until the misalignment of multifilament fibers can no longer be observed. After all multifilament fibers reach a tightly packed state, the adjustment is completed.

[0061] (7) After the current blank structure is adjusted, add multifilament fibers into the plate-laying mold and continue the plate-laying in steps (5) and (6) until a blank with a complete structure is obtained.

[0062] (8) When the blanks are arranged to the top layer, the four double wires at the top left and top right are left empty to form gaps, providing space for subsequent binding operations. The resulting blanks are shown in Figure 2.

[0063] (9) After the billet is arranged, first use an elastic coil to wrap around the billet to fix the piled multifilament fibers. Then select a Cr20Ni80 thermoplastic alloy wire with stable thermal properties and tightly wrap it around the billet. Finally, tie a knot in the empty gap at the top of the billet to fix it, and place the excess Cr20Ni80 thermoplastic alloy wire in the reserved gap.

[0064] Example 2

[0065] The arrangement method is the same as in Example 1, except that:

[0066] Step (3): Perform ultrasound at 120 Hz for 60 min, then perform ultrasound at 40 Hz for 40 min.

[0067] Step (4): Bake in a vacuum oven at 70°C for 60 minutes;

[0068] Step (5): For every 4 layers, set the vibration frequency to 20Hz, the amplitude to 0.1mm, and the vibration time to 10min.

[0069] Step (9): Wrap copper wire around the blank plate;

[0070] Example 3

[0071] The arrangement method is the same as in Example 1, except that:

[0072] Step (3): Perform ultrasound at a frequency of 120 Hz for 50 min, and then perform ultrasound at a frequency of 40 Hz for 60 min.

[0073] Step (4): Bake in a vacuum oven at 80°C for 40 minutes;

[0074] Step (5): For every 6 layers, set the vibration frequency to 100Hz, the amplitude to 1.0mm, and the vibration time to 5min.

[0075] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A device for tightly and efficiently arranging composite glass fibers, characterized in that: The device includes a slab-laying mold for placing multifilament fibers. The slab-laying mold is placed on an electromagnetic vibration table, which is connected to a controller. The controller is used to control the electromagnetic vibration table to vibrate according to a set frequency, amplitude, and time.

2. The device for tightly and efficiently arranging composite glass fibers according to claim 1, characterized in that, A magnifying glass is provided above the slab mold, and the magnifying glass is connected to a display screen, which can display the blank structure formed by the arrangement of multifilament fibers in real time.

3. A method for achieving tight and efficient arrangement of composite glass fibers using the apparatus described in claim 1 or 2, characterized in that, The process includes the following steps: (1) Place the slab mold on the surface of the electromagnetic vibration table, put multifilament fibers into the slab mold to arrange the blank, and set a preset number of layers for each arrangement. Turn on the controller, and after the electromagnetic vibration table receives the signal, drive the slab mold to vibrate up and down for a preset time at a set frequency and amplitude. The vibration of the slab mold will then drive the multifilament fibers inside to vibrate and adjust their positions, filling the excess space inside the slab mold so that all the multifilament fibers are tightly packed. (2) Display the blank structure in real time through the display screen connected to the magnifying glass, and observe the arrangement of the multifilament fibers on the display screen. When the multifilament fibers are observed to be arranged neatly, turn off the controller to complete the adjustment. (3) After the current blank structure adjustment is completed, add multifilament fibers to the slab mold and continue the slab arrangement in steps (1) and (2) until a blank with a complete structure is obtained.

4. The method for tightly and efficiently arranging composite glass fibers according to claim 3, characterized in that, Also includes: When the blanks are arranged to the top layer, the positions of the four multifilament fibers on both sides of the top layer are left empty to form gaps. After the blanks are arranged, elastic coils are first used to wrap around the side of the blanks to fix the piled multifilament fibers. Then, a metal wire with stable thermal properties is selected and wrapped around the side of the blanks. The wire is knotted and fixed in the gap at the top of the blanks, and the excess metal wire is placed in the gap.

5. The method according to claim 4, characterized in that, The metal wire is either Cr20Ni80 hot-dip galvanized wire or copper wire.

6. The method according to claim 4, characterized in that, The frequency is 20-600Hz, the amplitude is 0.1-5mm, the time is 5-10min, and the preset number of layers is 4-6.

7. The method according to any one of claims 3-6, characterized in that, Before the multifilament fibers are arranged, the following processing steps are also included: (1) the multifilament fibers are separated and fixed on the microfiber separation and fixing device, and then the long fiber filaments are cut into short fiber filaments of the required length using a tungsten carbide knife; (2) the front, middle and back of the short fiber filaments are measured with a micrometer, and after comparing with the standard filament diameter, they are classified and placed according to different accuracy ranges; (3) the multifilament fibers that meet the accuracy requirements are transferred to the glass fiber cleaning device and ultrasonically cleaned with ethanol solution; (4) the ultrasonically cleaned multifilament fibers are dried in a vacuum oven.

8. The method according to claim 7, characterized in that, The ultrasonic cleaning includes: ultrasonic cleaning at a frequency of 120 Hz for 30-60 minutes, followed by ultrasonic cleaning at a frequency of 40 Hz for 30-60 minutes, with the ultrasonic cleaning temperature being room temperature; the drying temperature is 60-80 ℃, and the drying time is 30-60 minutes.

9. A blank plate, arranged according to the method described in any one of claims 3-8.

10. Use of the blank of claim 9 for preparing a microchannel plate.

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