A one-step high-silica glass fiber drawing equipment and process

Abstract

This invention discloses a one-step high-silica glass fiber drawing device and process, comprising: a drawing guide cylinder, a feed cylinder, a conveying shaft, and a forming guide seat. The top surface of the drawing guide cylinder is provided with a hopper, and the bottom surface of the hopper is fixedly connected to several extrusion cylinders. The feed cylinders are fixedly installed at the bottom of the hopper and located inside the drawing guide cylinder. The surface of the feed cylinder is provided with a conveying pipe connected to the end of the extrusion cylinder. A geared motor is fixedly installed at one end of the extrusion cylinder, and the output end of the geared motor is fixedly connected to the end of the conveying shaft. In this invention, by setting an extrusion-type pressure-boosting fiber output structure, during the drawing process, the natural material flow on the top surface of the feed cylinder and the rotation of the conveying shafts inside each conveying pipe are used for extrusion injection, increasing the output material flow pressure. Thus, under the action of the forming guide seat and the perforated plate, the fiber filaments are formed in one step, completing the one-step drawing process. Furthermore, the strong extrusion pressure effectively avoids fiber breakage caused by flow interruption.

Description

Technical Field

[0001] This invention relates to the field of glass fiber production technology, specifically to a one-step drawing equipment and process for high-silica glass fibers. Background Technology

[0002] The production process of high-silica glass fiber is based on the phase separation phenomenon during the melting or cooling of glass. When the glass cools, the separation of different liquid phases leads to micro-inhomogeneities, resulting in a relative enrichment of SiO2. Subsequently, through acid leaching technology, the phase rich in B2O3 and Na2O is dissolved out, leaving a framework mainly composed of SiO2. The structure is then strengthened by high-temperature treatment, ultimately forming high-silica glass fiber.

[0003] Traditional glass fiber drawing primarily relies on the gravity of molten glass flowing through a forming tube. The combined effects of hydraulic pressure and gravity force it through a perforated plate to form relatively coarse fiber lines, which are then stretched into extremely fine filaments through multiple steps. This process requires precise control of the molten glass's flowability and temperature, as well as the design and layout of the perforated plate, making it relatively cumbersome. Furthermore, due to limitations imposed by gravity and hydraulic pressure, production efficiency is often low, with a relatively slow fiber output speed. This slow output leads to higher heat consumption and costs. Additionally, during the drawing process, as the amount of molten glass decreases, its internal pressure gradually drops. This pressure change affects the flowability of the molten glass and the fiber output effect, making the process unstable and prone to flow interruptions. Moreover, bubbles are generated during the heating of the molten glass. If these bubbles are not effectively eliminated, they can be incorporated into the fibers during drawing, creating defects. The presence of bubbles not only reduces fiber quality but can also cause interruptions in fiber output, affecting fiber continuity and strength.

[0004] In view of this, this paper studies and improves the existing problems, and provides a one-step high-silica glass fiber drawing equipment and process to solve the current problems. The aim is to solve the problems and improve the practical value through this technology. Summary of the Invention

[0005] The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

[0006] Therefore, the technical solution adopted by this invention is as follows: a one-step drawing device for high-silica glass fiber, comprising: a drawing guide cylinder, a guide cylinder, a conveying shaft, and a forming guide seat. The top surface of the drawing guide cylinder is provided with a hopper, and the bottom surface of the hopper is fixedly connected to several extrusion cylinders. The guide cylinder is fixedly installed at the bottom end of the hopper and located inside the drawing guide cylinder. The surface of the guide cylinder is provided with a conveying pipe connected to the end of the extrusion cylinder. A reduction motor is fixedly installed at one end of the extrusion cylinder, and the output end of the reduction motor is fixed to the end of the conveying shaft. The forming guide is rotatably sleeved around the outer periphery of the drawing guide cylinder. An electrode ring is fixedly installed on the bottom surface of the drawing guide cylinder, and a perforated plate is fixedly connected to the bottom end of the electrode ring. A discharge guide mold is provided at the bottom end of the perforated plate. A transmission tooth is fixedly connected to the end of the conveying shaft. A transmission disc that meshes with the surface of the transmission tooth is provided at the top end of the forming guide. A synchronous tooth that meshes with the surface of the transmission tooth is rotatably sleeved at the top end of the drawing guide cylinder. A flat shaft disc that abuts against the bottom surface of the drawing guide cylinder is provided on the top surface of the synchronous tooth.

[0007] In a preferred embodiment, the present invention can be further configured such that: the number of conveying shafts, extrusion cylinders and conveying pipes are several groups and arranged in a one-to-one correspondence; the several conveying shafts, extrusion cylinders and conveying pipes are evenly distributed in a circumferential direction on the outer periphery of the drawing guide cylinder; by setting several or more conveying shafts, the molten high silica glass raw liquid is extruded synchronously and injected in opposite directions, thereby causing the raw liquid to be extruded and pushed along the axis.

[0008] In a preferred embodiment, the present invention can be further configured such that: each of the conveying shafts, extrusion cylinders and conveying pipes are arranged at an incline, and the connection end between the conveying pipe and the guide cylinder is inclined downward toward the bottom end of the guide cylinder. Synchronous movement of each conveying shaft is achieved through synchronous gears and transmission discs, so that the conveying pressure of each conveying shaft is equal and the oblique flows cancel each other out under the transverse force. The oblique flows form a longitudinal flow effect to improve the downward extrusion force.

[0009] In a preferred embodiment, the present invention can be further configured such that: the transmission teeth are conical tooth structures, the synchronization teeth and the transmission disk are conical ring tooth structures, and a conical conveying shaft and extrusion cylinder structure are adopted, so that the extrusion pressure gradually increases in the extruded liquid flow.

[0010] In a preferred embodiment, the present invention can be further configured such that: the conveying shaft includes a tapered shaft and helical blades located on the outer periphery of the tapered shaft, and the helical blades slide against the inner side of the extrusion cylinder. In a preferred embodiment, the present invention can be further configured such that: the vibrating rod is a pin-shaped structure, and a polarization motor is provided inside the vibrating rod; the end of the vibrating rod is provided with a shock-absorbing sleeve fixed to the inner side of the forming guide seat; through the high-frequency oscillation of the liquid flow by the vibration action, the air bubbles inside the liquid flow float to the surface, thereby eliminating the air bubbles inside the liquid flow.

[0011] In a preferred embodiment, the present invention can be further configured such that: the outer periphery of the transmission disk is provided with an electrode ring for electrical connection of the end of the vibrating rod, and the inner side of the electrode ring sleeve slides against the surface of the electrode ring for electrode connection of the vibrating rod, thereby ensuring the electrode connection of the vibrating rod during the rotation of the transmission disk.

[0012] A one-step drawing process for high-silica glass fibers includes the following steps: a. Raw material preparation: Quartz powder, albite, and soda ash are used as the main raw materials, and 2%-5% of trisodium borate and 0.5%-1.5% of zirconium oxide are added according to the total weight of the raw materials. All raw materials are fully mixed in a mixer to ensure that the modified substances and melting rate accelerators are evenly distributed in the raw materials. b. Melting: The mixed raw materials are fed into a special furnace and melted at a melting temperature of 1300℃-1400℃. An inert gas is used as a protective atmosphere in the furnace to reduce oxidation reactions and improve the purity of the melt. During the melting process, stirring is strengthened to ensure the uniformity of the melt and to promote the full mixing of the modified material and the glass components. c. Forming and drawing: The melt is formed and extruded into fibers using a one-step high-silica glass fiber drawing equipment, and then directly drawn into fibers at a suitable temperature and stretching speed. d. Impregnation treatment: The drawn glass fibers are coated with an impregnation agent. The impregnation agent is composed of 30%-40% polysiloxane, 10%-20% silane coupling agent, and 5%-10% antistatic agent by weight. The impregnation agent is evenly coated on the fiber surface by spraying or impregnation to form a dense protective film. e. Subsequent steps: including routine operations such as heat treatment, packaging and storage, to ensure the final quality and stability of the fiberglass products.

[0013] The beneficial effects achieved by this invention are as follows: 1. In this invention, by setting an extrusion-type pressure-boosting filament extrusion structure, during the filament drawing process, the natural material flow on the top surface of the guide cylinder and the rotation of the conveying shafts inside each conveying pipe are used for extrusion injection, thereby increasing the pressure of the outflow material flow. Thus, under the action of the forming guide seat and the perforated plate, the fiber filaments are formed in one step, completing the one-step filament drawing. Moreover, the strong extrusion pressure effectively avoids filament breakage caused by flow interruption.

[0014] 2. In this invention, the rotational transmission of the forming guide is achieved by the rotational motion of the conveying shaft. Inside the forming guide, the material flow is further agitated by the revolution of the vibrating rod. The high-frequency vibration of the vibrating rod eliminates air bubbles inside the material flow, causing it to float to the surface. This effectively avoids the phenomenon of wire breakage caused by air bubbles and improves the stability of wire drawing and forming.

[0015] 3. In this invention, the drawing process incorporates a novel modified substance, trisodium borate, and optimizes the melting process to reduce the melting temperature and melting rate accelerator, zirconium oxide, of the high-silica glass fiber, thereby reducing production energy consumption and costs. Due to the addition of the modified substance, the melt maintains good fluidity and formability at lower temperatures, thus reducing the required drawing temperature. The novel wetting agent significantly improves the wetting effect of the glass fiber, enhancing its corrosion resistance, abrasion resistance, and other properties, while reducing friction and breakage between fibers. The process is simple, easy to implement, and the resulting high-silica glass fiber exhibits excellent performance, meeting the application needs of various fields. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of a wire drawing guide cylinder according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the guide cylinder and forming guide seat structure according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the hopper and extrusion cylinder structure according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the guide cylinder structure according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the conveyor shaft structure according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the cross-sectional structure of the guide cylinder and forming guide seat according to an embodiment of the present invention.

[0017] Figure label: 100. Wire drawing guide cylinder; 110. Hopper; 120. Extrusion cylinder; 130. Gear motor; 140. Perforated plate; 101. Electrode ring sleeve; 141. Discharge guide mold; 200. Guide cylinder; 210. Conveying pipe; 220. Synchronizing gear; 221. Flat shaft disc; 300. Conveying shaft; 310. Transmission gear; 400. Forming guide seat; 410. Transmission disc; 420. Vibrating rod; 421. Electrode ring. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0019] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the invention.

[0020] The following describes, with reference to the accompanying drawings, some embodiments of a one-step high-silica glass fiber drawing equipment and process provided by the present invention.

[0021] Combination Figures 1-7 As shown, the present invention provides a one-step high-silica glass fiber drawing device, comprising: a drawing guide cylinder 100, a guide cylinder 200, a conveying shaft 300, and a forming guide seat 400. A hopper 110 is provided on the top surface of the drawing guide cylinder 100, and a plurality of extrusion cylinders 120 are fixedly connected to the bottom surface of the hopper 110. The guide cylinders 200 are fixedly installed at the bottom end of the hopper 110 and located inside the drawing guide cylinder 100. A conveying pipe 210 connected to the end of the extrusion cylinders 120 is provided on the surface of the guide cylinder 200. A reduction motor 130 is fixedly installed at one end of the extrusion cylinder 120, and the output end of the reduction motor 130 is fixedly connected to the end of the conveying shaft 300. The forming guide seat 400 is rotatably sleeved on the outer periphery of the guide cylinder 200. An electrode ring sleeve 101 is fixedly installed on the bottom surface of the drawing guide cylinder 100, and a perforated plate 140 is fixedly connected to the bottom end of the electrode ring sleeve 101. A discharge guide mold 141 is provided at the bottom end of the perforated plate 140. A transmission gear 310 is fixedly connected to the end of the conveying shaft 300. A transmission disc 410 that meshes with the surface of the transmission gear 310 is provided at the top end of the forming guide seat 400. A synchronous gear 220 that meshes with the surface of the transmission gear 310 is rotatably sleeved on the top end of the guide cylinder 200. A flat shaft disc 221 that abuts against the bottom surface of the drawing guide cylinder 100 is provided on the top surface of the synchronous gear 220.

[0022] In this embodiment, the number of conveying shafts 300, extrusion cylinders 120, and conveying pipes 210 are several groups arranged in a one-to-one correspondence, and the several conveying shafts 300, extrusion cylinders 120, and conveying pipes 210 are evenly distributed in a circumferential direction on the outer periphery of the drawing guide cylinder 100. In this embodiment, each of the conveying shafts 300, the extrusion cylinder 120 and the conveying pipe 210 is arranged at an angle, and the connection end between the conveying pipe 210 and the guide cylinder 200 is tilted downward toward the bottom end of the guide cylinder 200.

[0023] Specifically, by setting up several conveying shafts 300 to simultaneously extrude molten high-silica glass raw liquid and inject it in opposite directions, the raw liquid is extruded and pushed along the shaft.

[0024] In this embodiment, the transmission gear 310 has a conical tooth structure, and the synchronizing gear 220 and the transmission disk 410 have a conical ring tooth structure.

[0025] Specifically, the synchronous movement of each conveying shaft 300 is achieved through the synchronous gear 220 and the transmission disc 410, so that the conveying pressure of each conveying shaft 300 is equal and the oblique flows cancel each other out under the transverse force, and the oblique flows form a longitudinal flow effect to improve the downward extrusion force.

[0026] In this embodiment, the conveying shaft 300 includes a tapered shaft and helical blades located on the outer periphery of the tapered shaft, and the helical blades slide against the inner side of the extrusion cylinder 120. Specifically, a conical conveying shaft 300 and an extrusion cylinder 120 structure are adopted, and the extrusion pressure gradually increases during the extrusion of the liquid flow.

[0027] In this embodiment, the vibrating rod 420 has a pin-shaped structure, and a polarization motor is provided inside the vibrating rod 420. The end of the vibrating rod 420 is provided with a shock-absorbing sleeve fixed to the inside of the forming guide seat 400.

[0028] In this embodiment, the outer periphery of the transmission disk 410 is provided with an electrode ring 421 for electrical connection to the end of the vibrating rod 420, and the inner side of the electrode ring sleeve 101 slides against the surface of the electrode ring 421 for electrode connection of the vibrating rod 420. Specifically, the liquid flow is guided by the rotation of the vibrating rod 420, and the stirring effect of the vibrating rod 420 on the liquid flow further improves the fluidity of the liquid flow. Simultaneously, the high-frequency oscillation of the liquid flow by this vibration causes the air bubbles inside the liquid flow to float to the surface, thus eliminating the air bubbles inside the liquid flow.

[0029] A one-step drawing process for high-silica glass fibers includes the following steps: a. Raw material preparation: Quartz powder, albite, and soda ash are used as the main raw materials, and 2%-5% of trisodium borate and 0.5%-1.5% of zirconium oxide are added according to the total weight of the raw materials. All raw materials are fully mixed in a mixer to ensure that the modified substances and melting rate accelerators are evenly distributed in the raw materials. b. Melting: The mixed raw materials are fed into a special furnace and melted at a melting temperature of 1300℃-1400℃. An inert gas is used as a protective atmosphere in the furnace to reduce oxidation reactions and improve the purity of the melt. During the melting process, stirring is strengthened to ensure the uniformity of the melt and to promote the full mixing of the modified material and the glass components. c. Forming and drawing: The melt is formed and extruded into fibers using a one-step high-silica glass fiber drawing equipment, and then directly drawn into fibers at a suitable temperature and stretching speed. d. Impregnation treatment: The drawn glass fibers are coated with an impregnation agent. The impregnation agent is composed of 30%-40% polysiloxane, 10%-20% silane coupling agent, and 5%-10% antistatic agent by weight. The impregnation agent is evenly coated on the fiber surface by spraying or impregnation to form a dense protective film. e. Subsequent steps: including routine operations such as heat treatment, packaging and storage, to ensure the final quality and stability of the fiberglass products.

[0030] Specifically, the introduction of a novel modified material, trisodium borate, and optimization of the melting process lowers the melting temperature and melting rate accelerator, zirconium oxide, in high-silica glass fibers, thereby reducing production energy consumption and costs. Due to the addition of the modified material, the melt maintains good fluidity and formability at lower temperatures, thus reducing the requirement for drawing temperature. The novel wetting agent significantly improves the wetting effect of the glass fibers, enhancing their corrosion resistance, abrasion resistance, and other properties, while reducing inter-fiber friction and breakage. The process is simple, easy to implement, and the resulting high-silica glass fibers exhibit excellent performance, meeting the application needs of various fields.

[0031] Working principle and usage process of this invention: The hopper 110 is located on the top surface of the drawing guide cylinder 100 and is used to hold and supply high silica glass raw materials. The partially molten liquid flow flows directly down through the guide cylinder 200 under downward motion, providing part of the downward pressure force. Several extrusion cylinders 120 are fixedly connected to the bottom surface of the hopper 110. These extrusion cylinders 120 are used to transport the raw materials from the hopper to the guide cylinder 200. The surface of the guide cylinder 200 is provided with a conveying pipe 210 connected to the end of the extrusion cylinder 120. The raw materials are transported into the guide cylinder through the conveying pipe. The conveying pipe 210 and the extrusion cylinder 120 are connected to both sides of the transmission gear 310. A reduction motor 130 is fixedly installed at one end of the extrusion cylinder 120. The output end of the reduction motor is fixedly connected to the end of the conveying shaft 300. The end of the conveying shaft 300 is fixedly connected to a transmission gear 310. Driven by the geared motor, the conveying shaft 300 achieves synchronous rotation through the transmission action of the transmission gear 310, pushing the raw material to flow downward. The forming guide seat 400 is rotatably sleeved on the outer circumference of the guide cylinder 200. Through the transmission engagement of the transmission gear 310 and the transmission disc 410, synchronous rotation is achieved. The vibrating rod 420 has a pin-shaped structure and is equipped with a polarization motor inside. Through vibration, it further improves the fluidity of the liquid flow and eliminates internal air bubbles.

[0032] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A one-step high-silica glass fiber drawing device, characterized in that, include: The drawing guide cylinder (100), the material guide cylinder (200), the conveying shaft (300), and the forming guide seat (400) are provided. The top surface of the drawing guide cylinder (100) is provided with a hopper (110), and the bottom surface of the hopper (110) is fixedly connected with several extrusion cylinders (120). The material guide cylinder (200) is fixedly installed at the bottom end of the hopper (110) and located inside the drawing guide cylinder (100). The surface of the material guide cylinder (200) is provided with a conveying pipe (210) connected to the end of the extrusion cylinder (120). One end of the extrusion cylinder (120) is fixedly installed with a reduction motor (130), and the output end of the reduction motor (130) is fixedly connected to the end of the conveying shaft (300). The forming guide seat (400) is rotatably sleeved on the guide cylinder. On the outer periphery of the material cylinder (200), an electrode ring sleeve (101) is fixedly installed on the bottom surface of the wire drawing guide cylinder (100), and a perforated plate (140) is fixedly connected to the bottom end of the electrode ring sleeve (101). A discharge guide mold (141) is provided at the bottom end of the perforated plate (140). A transmission tooth (310) is fixedly connected to the end of the conveying shaft (300). A transmission disc (410) is provided at the top end of the forming guide seat (400) and engages with the surface of the transmission tooth (310). A synchronous tooth (220) is rotatably sleeved at the top end of the material cylinder (200) and engages with the surface of the transmission tooth (310). A flat shaft disc (221) is provided on the top surface of the synchronous tooth (220) and abuts against the bottom surface of the wire drawing guide cylinder (100).

2. The one-step high-silica glass fiber drawing equipment according to claim 1, characterized in that, The number of conveying shafts (300), extrusion cylinders (120) and conveying pipes (210) are several groups and arranged in a one-to-one correspondence. Several conveying shafts (300), extrusion cylinders (120) and conveying pipes (210) are evenly distributed in a circumferential direction on the outer periphery of the wire drawing guide cylinder (100).

3. The one-step high-silica glass fiber drawing equipment according to claim 1, characterized in that, Each of the conveying shafts (300), extrusion cylinders (120) and conveying pipes (210) is arranged at an inclination, and the connection end between the conveying pipe (210) and the guide cylinder (200) is inclined downward toward the bottom end of the guide cylinder (200).

4. The one-step high-silica glass fiber drawing equipment according to claim 1, characterized in that, The transmission gear (310) has a conical tooth structure, and the synchronization gear (220) and transmission disc (410) have a conical ring tooth structure.

5. The one-step high-silica glass fiber drawing equipment according to claim 1, characterized in that, The conveying shaft (300) includes a tapered shaft and a spiral blade located on the outer periphery of the tapered shaft, and the spiral blade slides against the inner side of the extrusion cylinder (120).

6. The one-step high-silica glass fiber drawing equipment according to claim 1, characterized in that, The vibrating rod (420) has a pin-shaped structure and a polarization motor is provided inside the vibrating rod (420). The end of the vibrating rod (420) is provided with a shock-absorbing sleeve fixed to the inside of the forming guide seat (400).

7. The one-step high-silica glass fiber drawing equipment according to claim 1, characterized in that, The outer periphery of the transmission disc (410) is provided with an electrode ring (421) for electrical connection of the end of the vibrating rod (420). The inner side of the electrode ring sleeve (101) slides against the surface of the electrode ring (421) for electrode connection of the vibrating rod (420).

8. A one-step drawing process for high-silica glass fibers, characterized in that, Includes the following steps: a. Raw material preparation: Quartz powder, albite, and soda ash are used as the main raw materials, and 2%-5% of trisodium borate and 0.5%-1.5% of zirconium oxide are added according to the total weight of the raw materials. All raw materials are fully mixed in a mixer to ensure that the modified substances and melting rate accelerators are evenly distributed in the raw materials. b. Melting: The mixed raw materials are fed into a special furnace and melted at a melting temperature of 1300℃-1400℃. An inert gas is used as a protective atmosphere in the furnace to reduce oxidation reactions and improve the purity of the melt. During the melting process, stirring is strengthened to ensure the uniformity of the melt and to promote the full mixing of the modified material and the glass components. c. Forming and drawing: The melt is formed and extruded into fibers using a one-step high-silica glass fiber drawing equipment, and then directly drawn into fibers at a suitable temperature and stretching speed. d. Impregnation treatment: The drawn glass fibers are coated with an impregnation agent. The impregnation agent is composed of 30%-40% polysiloxane, 10%-20% silane coupling agent, and 5%-10% antistatic agent by weight. The impregnation agent is evenly coated on the fiber surface by spraying or impregnation to form a dense protective film. e. Subsequent steps: including routine operations such as heat treatment, packaging and storage, to ensure the final quality and stability of the fiberglass products.

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