Quartz fiber yarn preparation method
The quartz raw material rod is refined by the thermal drawing method and tensile and torsional force are applied to form multiple strands of stick-bonded stranded quartz fibers. The twisted quartz fiber monofilament is then produced by the rod drawing method, which solves the problems of cumbersome and high cost of the existing quartz fiber yarn preparation process and realizes efficient and low-cost preparation of quartz fiber yarn.
Patent Information
- Application Number
- CN202411534509.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-02-25
AI Technical Summary
The existing quartz fiber yarn preparation process is cumbersome and costly, making it difficult to meet the requirements of high quality and economical production.
The large-diameter quartz raw material rod is refined into a small-diameter quartz raw material rod by thermal drawing method, and tensile and torsional forces are applied during the drawing process to form a multi-stranded stranded strand, and then twisted quartz fiber monofilament is produced by the rod drawing method.
The efficient preparation of quartz fiber yarn is achieved, the production cost is reduced, the stability and processability of the tow are improved, and the problem of poor bundleability after the traditional multi-strand small-diameter fiber bundle is combined.
Smart Images
Figure CN119504136A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of inorganic fiber preparation, and relates to a method for preparing quartz fiber yarn. Background Art
[0002] The preparation methods of quartz fiber yarn mainly include direct melt drawing, rod drawing and sol-gel method. Among them, rod drawing is the main preparation method in industrial production. The main process of rod drawing is: a quartz glass rod with a smaller diameter (about 3mm) is drawn by a quartz glass rod with a larger diameter, and then the small diameter quartz glass rod is finely drawn into glass fiber yarn under heating. Quartz fiber retains some characteristics and properties of solid quartz, with high heat resistance, high temperature and high frequency electrical insulation, ablation resistance and chemical stability. It also has good mechanical properties. The tensile strength under the same diameter is 3 times that of ordinary fibers. When used, like ordinary fibers, the filaments obtained by drawing need to be bundled, twisted, composited, braided and other forms to give full play to their physical and chemical properties. Among them, twisting can make the fiber have better strength, softness, wear resistance and processability, and can meet higher quality requirements. Quartz fiber products are widely used in scenes such as structural reinforcement, wave transmission and thermal insulation materials in key parts of aviation and aerospace vehicles.
[0003] Since quartz fiber yarn needs to be made into micron-level monofilaments and then formed into woven yarns by twisting and plying, its preparation process is relatively complicated and the cost is high, which is dozens of times that of ordinary glass fiber. Based on this, this scheme proposes a quartz fiber yarn preparation process with simplified process and reduced yarn cost. Summary of the invention
[0004] The purpose of the present invention is to provide a method for preparing quartz fiber yarn in view of the above problems existing in the prior art. The technical problem to be solved by the present invention is how to reduce the cost.
[0005] The object of the present invention can be achieved through the following technical solutions: A method for preparing quartz fiber yarn, characterized in that it includes the following steps: A. preparing small-diameter quartz raw material rods: preparing small-diameter quartz raw material rods by hot drawing at least two large-diameter quartz raw material rods, and when drawing the small-diameter quartz raw material rods, simultaneously applying tension and torsional force along the length direction of the rods, so that the prepared small-diameter quartz raw material rods are in the shape of multiple strands of adhered twisted wires; B. using the small-diameter quartz raw material rods prepared in step A as the furnace rods, and preparing quartz fiber monofilaments by a rod drawing method of one rod and one yarn.
[0006] The present invention is different from the prior art in that, on the one hand, a plying method is adopted when thinning large-diameter quartz raw material rods, and multiple large-diameter quartz raw material rods are pulled out synchronously and a torsional force is applied to form twisted small-diameter quartz raw material rods. This twisting is carried out during the heating process of the rod, thereby realizing a large twist structure in which each strand is adhered to each other. On the other hand, when drawing small-diameter quartz raw material rods, the diameter of the fiber bundle can be controlled to be between 10 and 50 microns, which is several times larger than traditional quartz fiber monofilaments, forming "already twisted" small-twist fiber monofilaments. In this way, twisted fiber filament bundles can be directly obtained, which to a certain extent have the performance of multiple traditional quartz fibers after plying. On the one hand, this method saves costs and improves efficiency due to the increase in the drawing diameter. On the other hand, it can produce adhered, multiple-strand twisted quartz fiber bundles, which overcomes the poor bundling of traditional multiple-strand small-diameter fiber bundles after plying, and the probability of loose and broken fibers is greatly reduced, and the fiber bundle has better stability and better processability.
[0007] Furthermore, step A applies tension and torsional force to the small diameter quartz raw material rod synchronously through a drawing device, the drawing device includes an outer gear ring fixed on the frame, a mounting disk rotatably connected to the outer gear ring through a bearing, and a drawing mechanism fixed on the mounting disk, the mounting disk is driven by a driving motor, the drawing mechanism includes two symmetrically arranged guide rollers, the mounting disk has a through hole in the middle, the guide rollers are rotatably connected to the mounting disk, the two guide rollers are fixed with synchronous gears that mesh with each other, one of the guide rollers is also fixed with an intermediate gear 1, the mounting disk is rotatably connected with a mounting shaft, one end of the mounting shaft is fixed with an intermediate gear 2 that meshes with the intermediate gear 1, and the other end of the mounting shaft is fixed with a planetary gear that meshes with the outer gear ring.
[0008] Since the rod drawing method in this scheme is different from the existing technology, this drawing device is proposed based on implementation integrity considerations. In fact, there are many ways to simultaneously apply torsional force and tensile force in the fully solidified section of the quartz rod. This device is relatively simple in structure. While driving the mounting disk to rotate, the outer gear ring drives the guide roller to rotate. The two guide rollers apply tensile force to the rod, and the rotation of the mounting disk provides torsional force for the rod.
[0009] It should be noted that this solution is based on the rod drawing method of softening drawing, rather than melt drawing and spinning methods, otherwise it is impossible to form a fiber bundle with a twisted fiber structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a schematic diagram of the principle of drawing a large diameter quartz raw material rod into a small diameter quartz raw material rod.
[0011] Figure 2 It is a schematic diagram of the principle of wire drawing using a small diameter quartz raw rod as raw material.
[0012] Figure 3 It is a structural schematic diagram of the drawing device.
[0013] In the figure, 1. outer ring gear; 2. mounting plate; 3. guide roller; 4. synchronous gear; 5. intermediate gear 1; 6. intermediate gear 2; 7. planetary gear. DETAILED DESCRIPTION
[0014] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
[0015] like Figure 1 As shown, a small diameter quartz raw material rod is prepared: at least two large diameter quartz raw material rods are grouped together, and the lower ends of the large diameter quartz raw material rods are softened by heating, and the small diameter quartz raw material rods are obtained by drawing. When the small diameter quartz raw material rods are drawn, tensile force and torsional force are simultaneously applied along the length direction of the rods, so that the obtained small diameter quartz raw material rods are in the shape of multiple strands of adhered twisted wires; as shown Figure 2 As shown, the small diameter quartz raw material rod is used as the furnace rod, and the quartz fiber monofilament is obtained by the rod drawing method, one rod and one yarn. Here, the softening drawing method is also adopted instead of the hot melting method. The softening drawing process is an existing means, which is not concretized in this scheme. In fact, material difference, tension, torsion speed, temperature, rod diameter, bundle size, etc. are all specific parameters that affect each other. The feasibility of implementation can be maintained through experiments. This scheme only proposes to obtain a limited filament bundle with fiber structure and twist to replace the traditional braided filament bundle after multi-filament twisting.
[0016] like Figure 3 As shown, a drawing device is also provided for synchronously applying tensile force and torsional force to a small diameter quartz raw material rod, the drawing device comprises an outer gear ring 1 fixed on a frame, a mounting plate 2 rotatably connected to the outer gear ring 1 through a bearing, and a drawing mechanism fixed to the mounting plate 2, the mounting plate 2 is driven by a driving motor, the drawing mechanism comprises two symmetrically arranged guide rollers 3, the mounting plate 2 has a through hole in the middle, the guide rollers 3 are rotatably connected to the mounting plate 2, the two guide rollers 3 are fixedly provided with synchronous gears 4 meshing with each other, one of the guide rollers 3 is also fixed with an intermediate gear 1 5, the mounting plate 2 is rotatably connected with a mounting shaft, one end of the mounting shaft is fixedly provided with an intermediate gear 2 6 meshing with the intermediate gear 1 5, and the other end of the mounting shaft is fixed with a planetary gear 7 meshing with the outer gear ring 1.
[0017] Since the rod drawing method in this scheme is different from the prior art, this drawing device is proposed based on implementation integrity considerations. In fact, there are many ways to simultaneously apply torsional force and tensile force in the fully solidified section of the quartz rod. The present device is relatively simple in structure. While driving the mounting disk 2 to rotate, the outer gear ring 1 drives the guide roller 3 to rotate. The two guide rollers 3 apply tensile force to the rod, and the rotation of the mounting disk 2 provides torsional force for the rod.
[0018] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.
Claims
1. A method for preparing quartz fiber yarn, characterized in that: The method comprises the following steps: A. preparing a small-diameter quartz raw material rod: obtaining a small-diameter quartz raw material rod by heat drawing at least two large-diameter quartz raw material rods, and when drawing the small-diameter quartz raw material rod, simultaneously applying a tensile force and a torsional force along the length direction of the rod, so that the obtained small-diameter quartz raw material rod is in the shape of a plurality of strands of adhered twisted wires; B. using the small-diameter quartz raw material rod obtained in step A as a furnace-entering rod, obtaining a quartz fiber monofilament by a rod drawing method, one rod and one yarn.
2. A method for preparing quartz fiber yarn according to claim 1, characterized in that: In step A, a drawing device is used to apply tensile force and torsional force to the solidified end of the small-diameter quartz raw material rod. The drawing device comprises an outer gear ring (1) fixed on a frame, a mounting plate (2) rotatably connected to the outer gear ring (1) through a bearing, and a drawing mechanism fixed on the mounting plate (2). The mounting plate (2) is driven by a driving motor. The drawing mechanism comprises two symmetrically arranged guide rollers (3). The mounting plate (2) has a through hole in the middle. The guide rollers (3) are rotatably connected to the mounting plate (2). Synchronous gears (4) that mesh with each other are fixedly arranged on the two guide rollers (3). An intermediate gear 1 (5) is also fixed on one of the guide rollers (3). A mounting shaft is rotatably connected to the mounting plate (2). An intermediate gear 2 (6) that meshes with the intermediate gear 1 (5) is fixedly arranged on one end of the mounting shaft. A planetary gear (7) that meshes with the outer gear ring (1) is fixedly arranged on the other end of the mounting shaft.