Low dielectric glass fibers, manufacturing process and equipment

Abstract

The application belongs to the technical field of glass fiber, and provides a low-dielectric glass fiber, a preparation process and equipment, which comprise 50.0-58.0 wt% SiO2, 18.0-26.0 wt% B2O3, 13.0-18.0 wt% Al2O3, 0.0-5.0 wt% MgO, 2.0-5.0 wt% CaO, 0.0-0.5 wt% R2O, 0.0-1.5 wt% TiO2 and 0.0%-3.0% titanium-zirconium-hafnium ternary mixed oxide, so that the application effectively reduces the bubble generation in the glass fiber, optimizes the dielectric performance and makes the glass fiber more stable and reliable. In the preparation process, the application adopts a unique melting-clarification-defoaming-fiber-drawing forming technology, strictly controls the temperature and time parameters in each stage and ensures the high-quality production of the glass fiber.

Description

Technical Field

[0001] This invention relates to the field of glass fiber technology, and in particular to a low dielectric glass fiber, its preparation process, and equipment. Background Technology

[0002] Existing methods for preparing low-dielectric glass fibers suffer from problems such as high bubble content, poor dielectric stability, and insufficient process adaptability. This invention addresses these issues by innovating the glass composition system and improving the melting-drawing process, thereby achieving a synergistic improvement in both low bubble content and low dielectric properties of the glass fibers.

[0003] Meanwhile, the existing process mainly includes melting, clarification, and fiber drawing steps. Therefore, the different temperatures of the three stages need to be differentiated in the same kiln. However, temperature control in the kiln is achieved by introducing combustion gases to burn the raw materials in a certain area to reach the preset temperature, which makes the temperature differentiation in stages unclear.

[0004] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the Invention

[0005] To address the aforementioned shortcomings, the present invention aims to provide a low-dielectric glass fiber, its preparation process, and equipment, which can: It effectively reduces the generation of air bubbles in glass fibers and optimizes dielectric properties, making them more stable and reliable.

[0006] In terms of manufacturing process, this invention employs a unique melting-clarification degassing-fiber drawing technology, strictly controlling the temperature and time parameters at each stage to ensure high-quality glass fiber production.

[0007] 3. Through innovative airflow guiding component design in the production equipment, the airflow distribution pattern inside the kiln is optimized, achieving precise temperature control and further improving the uniformity and performance stability of glass fiber.

[0008] To achieve the above objectives, the present invention provides a low-dielectric glass fiber comprising: 50.0-58.0 wt% SiO2, 18.0-26.0 wt% B2O3, 13.0-18.0 wt% Al2O3, 0.0-5.0 wt% MgO, 2.0-5.0 wt% CaO, 0.0-0.5 wt% R2O, 0.0-1.5 wt% TiO2, and 0.0%-3.0% titanium-zirconium-hafnium ternary mixed oxide.

[0009] The method for preparing low dielectric glass fiber according to the present invention includes: mixing the ingredients evenly and then putting them into a furnace, melting them at a liquid temperature of T1 and holding them at that temperature for 2-4 hours, then raising the temperature to T2 for clarification and degassing for 1-2 hours, controlling the cooling rate to T3 for drawing and forming, and obtaining the finished product after gradient cooling (cooling rate 50-80℃ / min) and surface modification treatment.

[0010] According to the low dielectric glass fiber of the present invention, the melting temperature T1 is 1480-1520℃, the clarifying temperature T2 is 1500-1550℃, and the drawing temperature T3 is 1420-1460℃.

[0011] According to the preparation method of the present invention, the melting temperature range ΔT of the melting temperature T1 is 30-50℃.

[0012] The production equipment according to the present invention includes a kiln; a gas input pipe extending into the kiln for inputting gas required for combustion in the kiln; and an airflow guiding assembly including multiple sets of guide plates located around the end of the gas input pipe and a flow divider movable to the extension direction of the end of the input pipe. In a first state, the flow divider is detached from the extension direction of the pipe end, and the surface of the guide plate restricts an airflow limiting space to block the airflow along a first direction; the first direction is the flow direction of the raw material within the kiln. In a second state, the guide plate ceases its blocking function, and the flow divider enters the extension direction of the pipe end and is at a predetermined distance from the pipe end to block and disperse the airflow.

[0013] According to the production equipment of the present invention, the guide plate has two sets. In the first state, the surface of the guide plate is parallel to the extension direction of the gas input pipe; in the second state, the surface of the guide plate is set at an angle to the extension direction of the gas input pipe.

[0014] According to the production equipment of the present invention, the flow divider is installed on the furnace wall by a bracket. Under the constraint of the cooperation between the flow divider and the bracket, the airflow direction is towards the flow divider; the airflow is further dispersed after being reflected by the flow divider.

[0015] According to the production equipment of the present invention, the guide plate is hinged to the support and rotates around the hinge point to switch between the first state and the second state; the diverter plate is hinged to the support and rotates around the hinge point to switch between the first state and the second state.

[0016] According to the production equipment of the present invention, the gas input pipeline includes a pipe head that is driven by a drive structure to reciprocate along its own axis.

[0017] According to the production equipment of the present invention, an elastic torsion spring is installed at the rotating connection of the guide plate, which is in a second state when there is no external force driving it; the guide plate is connected to the outer wall of the pipe head through a connector.

[0018] This invention provides a low-dielectric glass fiber, its preparation process, and equipment. The low-dielectric glass fiber is based on a SiO2-Al2O3-B2O3 system, featuring a low-alkali, fluorine-free, and environmentally friendly design. Its main components include: 50.0-58.0 wt% SiO2, 18.0-26.0 wt% B2O3, 13.0-18.0 wt% Al2O3, 0.0-5.0 wt% MgO, 2.0-5.0 wt% CaO, 0.0-0.5 wt% R2O, 0.0-1.5 wt% TiO2, and 0.0%-3.0% titanium-zirconium-hafnium ternary mixed oxide. The ionic polarizability of all metals is lower than that of alkali metals (e.g., ) and alkaline earth metals (such as By mixing these three ions in a certain proportion to replace part of the highly polarized ions, polar polarization in the glass network can be effectively reduced. Simultaneously, the radii of these three ions are highly compatible with the pore size of the glass network, enabling them to uniformly fill the network gaps and reduce the internal porosity of the glass to below 0.08%, thereby avoiding dielectric constant fluctuations caused by porosity. Its melting temperature (T1) is 1480-1520℃, refining temperature (T2) is 1500-1550℃, drawing temperature (T3) is 1420-1460℃, and the melting temperature range (ΔT) is 30-50℃. The density of the finished glass fiber is 2.42-2.48 g / cm³, and at high frequencies of 1-10 GHz, the dielectric constant (εr) does not exceed 4.2, and the bubble content does not exceed 0.05 bubbles / mm³.

[0019] This invention can: 1. It effectively reduces the generation of air bubbles in glass fibers and optimizes dielectric properties, making them more stable and reliable.

[0020] 2. In terms of the preparation process, this invention adopts a unique melting-clarification degassing-fiber drawing technology, strictly controlling the temperature and time parameters at each stage to ensure high-quality production of glass fibers.

[0021] 3. Through innovative airflow guiding component design in the production equipment, the airflow distribution pattern inside the kiln is optimized, achieving precise temperature control and further improving the uniformity and performance stability of glass fiber. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the internal structure of the kiln of the present invention; Figure 2This is a schematic diagram of the airflow guiding component of the present invention; Figure 3 This is a schematic diagram of the second state of the airflow guiding component of the present invention; Figure 4 This is a schematic diagram of the first state of the airflow guiding component of the present invention; In the diagram, 1-kiln, 2-gas input pipe, 3-airflow guide assembly, 4-guide plate, 5-diverter plate, 6-pipe head, 7-support, 8-connector. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the invention and are not intended to limit the invention.

[0024] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0025] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0026] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0027] See Figure 1This invention provides a low-dielectric glass fiber, its preparation process, and equipment. The low-dielectric glass fiber has the characteristics of low bubble size and low dielectric constant. Its composition is based on the SiO2-Al2O3-B2O3 system, and the main components include 50.0-58.0 wt% SiO2, 18.0-26.0 wt% B2O3, 13.0-18.0 wt% Al2O3, 0.0-5.0 wt% MgO, 2.0-5.0 wt% CaO, 0.0-0.5 wt% R2O, 0.0-1.5 wt% TiO2, and 0.0%-3.0% titanium-zirconium-hafnium ternary mixed oxide.

[0028] The ionic polarizability of all metals is lower than that of alkali metals (e.g., ) and alkaline earth metals (such as By mixing these three ions in a certain proportion to replace part of the highly polarized ions, polar polarization in the glass network can be effectively reduced. Simultaneously, the radii of these three ions are highly compatible with the pore size of the glass network, enabling them to uniformly fill the network gaps and reduce the internal porosity of the glass to below 0.08%, thereby avoiding dielectric constant fluctuations caused by porosity. Its melting temperature (T1) is 1480-1520℃, refining temperature (T2) is 1500-1550℃, drawing temperature (T3) is 1420-1460℃, and the melting temperature range (ΔT) is 30-50℃. The density of the finished glass fiber is 2.42-2.48 g / cm³, and at high frequencies of 1-10 GHz, the dielectric constant (εr) does not exceed 4.2, and the bubble content does not exceed 0.05 bubbles / mm³.

[0029] The method for preparing low-bubble, low-dielectric-constant glass fibers optimizes the uniformity and fluidity of the glass liquid phase by precisely controlling the temperature parameters at each stage.

[0030] During the melting stage, the temperature range of 1480-1520℃ ensures the full reaction of the SiO2-Al2O3-B2O3 ternary system. Combined with the narrow melting temperature range of 30-50℃ (ΔT), it effectively suppresses the formation of crystal nuclei caused by temperature fluctuations.

[0031] The clarification stage employs a high-temperature treatment at 1500-1550℃, combined with dynamic adjustment of the airflow guiding components within the kiln, to reduce the diameter of bubbles in the molten glass to below 50μm and increase the bubble removal rate to over 92%.

[0032] During the fiber drawing stage, a gradient cooling of 1420-1460℃ is used, along with a cooling rate of 50-80℃ / min, to form a dense amorphous structure on the surface of the glass fiber, and the dielectric loss tangent (tanδ) is stabilized below 0.003.

[0033] This invention also discloses a method for preparing low-bubble, low-dielectric-number glass fibers, comprising: mixing ingredients according to the formula, feeding them into a furnace, melting them at liquid temperature T and holding them at that temperature for 2-4 hours, then raising the temperature to T2 for clarification and degassing for 1-2 hours, controlling the cooling rate to T3 for drawing and forming, and obtaining the finished product after gradient cooling (cooling rate 50-80℃ / min) and surface modification treatment.

[0034] This invention effectively reduces bubbles and internal defects in glass melt by precisely controlling the temperature parameters and holding time during melting, clarification, and drawing. At the same time, it reduces ion polarization and interfacial polarization through composition optimization, achieving a balance of low dielectric properties, excellent mechanical properties, and good spinnability. It is suitable for high-frequency communication, aerospace electronic packaging, high-end printed circuit boards, and other fields, and has significant industrial application prospects.

[0035] In the aforementioned preparation process for low-bubble, low-dielectric-number glass fibers, since the existing glass fiber raw material melting steps are all carried out in a furnace, the designed steps include melting, clarification, and drawing. Therefore, the different temperatures of the three stages need to be differentiated in stages within the same furnace. Temperature control within the furnace is achieved by introducing combustion gases to fuel the combustion of raw materials in a specific area, thus reaching the preset temperature.

[0036] See Figures 1-4 Therefore, this application also discloses a production equipment adapted to this process, including a kiln; Gas input pipelines are primarily used to supply the gases required for combustion inside the kiln. These gases typically include air or oxygen. To optimize combustion efficiency, improve energy utilization, and enhance the quality of the final product, the use of pure oxygen or oxygen-enriched gas has become the mainstream trend. The gas input pipeline usually consists of a pipe head installed on the inner wall of the kiln and connecting pipes thereto. These pipes extend from the inside of the kiln outwards, ultimately connecting to an external gas pump, thus constructing a complete and efficient gas supply system.

[0037] The design of the gas input pipeline head is particularly critical. It must not only possess high-temperature and corrosion-resistant properties, but also be able to precisely control the gas output direction and flow rate to adapt to the varying combustion requirements of different melting stages. To this end, this production equipment integrates an advanced flow control valve (not shown in the figure) at the pipe head. This valve automatically adjusts the gas flow rate according to preset parameters, ensuring a precise oxygen supply at each stage, avoiding both excessive oxygen leading to energy waste and insufficient oxygen affecting combustion efficiency.

[0038] In addition, the kiln is equipped with multiple temperature sensors and an intelligent control system. These sensors are evenly distributed throughout the kiln, enabling real-time monitoring of temperature changes in each area and transmitting the data to the central control system. Based on the received temperature data and preset process parameters, the central control system automatically adjusts the flow rate of the gas input pipeline and the heating power of the kiln, forming a closed-loop control system to ensure that the entire melting-clarification-fiber drawing process is always in optimal condition.

[0039] An airflow guiding assembly includes multiple sets of guide plates located around the end of a gas input pipe and a flow divider that can move to the extension direction of the end of the input pipe. During normal melting process, the airflow guiding component is in the first state. In the first state, the flow divider plate is detached from the extension direction of the pipe end. The surface of the flow divider plate restricts an airflow limiting space to block the airflow along the first direction. After the airflow is blocked, it is restricted within the limiting area, which can effectively achieve the staged differentiation of temperature in the kiln. That is, the temperature of the melting zone in the kiln is controlled at 1480-1520℃, the clarification zone is controlled at 1500-1550℃, and the wire drawing and forming zone is controlled at 1420-1460℃. The first direction is the flow direction of the raw material in the kiln.

[0040] When the airflow guiding assembly is in its first state, the coordinated design of the guide plates and gas input pipes ensures that the airflow is precisely guided to specific areas, thereby guaranteeing the stability of different temperature zones within the kiln. Specifically, two sets of guide plates are arranged parallel to the pipe's extension direction, forming an airflow barrier that effectively prevents the airflow from diffusing along the raw material flow direction, allowing the melting, refining, and drawing zones to independently maintain their respective required temperature environments. This design not only improves the accuracy of temperature control but also reduces temperature fluctuations caused by airflow disturbances, thereby enhancing the quality stability of the glass fiber.

[0041] When the kiln is in the residual heat stage, the overall temperature inside the kiln rises, and the airflow guiding component enters its second state. In this state, the guide plate stops obstructing the airflow, and the diverter plate extends into the pipe end direction at a predetermined distance to disperse the airflow. After the airflow is dispersed, the uniform distribution of the gas inside the kiln is further optimized, achieving overall heating of the kiln.

[0042] When the airflow guiding assembly switches to the second state, the guide plate rotates via a hinged structure to a position forming a certain angle with the direction of pipe extension, while the splitter plate moves to the end of the pipe's extension direction, creating a dispersing effect on the airflow. At this point, the airflow is no longer confined to a specific area but is evenly distributed throughout the kiln, achieving overall heating of the kiln. This effectively improves the kiln's energy efficiency, reduces energy waste, and avoids equipment damage or product quality issues caused by localized overheating or overcooling.

[0043] In this embodiment, the guide plate is a flat plate structure with two sets. In the first state, the surface of the guide plate is parallel to the extension direction of the gas input pipe; in the second state, the surface of the guide plate is set at an angle to the extension direction of the gas input pipe. Specifically, the guide plate is hinged to the bracket and rotates around the hinge point to switch between the first and second states.

[0044] During the state switching process, the two sets of guide plates achieve a parallel or angled layout with respect to the pipe extension direction through the rotation of the hinge point. This design ensures precise obstruction of airflow in the first state and effective airflow dispersion in the second state. Specifically, when the guide plate is in the first state, its plate surface parallel to the pipe extension direction and the inner wall of the kiln form a closed airflow restriction space, allowing the airflow to circulate only in three independent areas: melting, clarification, and fiber drawing, avoiding cross-interference. When switching to the second state, the guide plate rotates to a position at an angle of 30°-60° with the pipe extension direction. At this time, the airflow, under the combined action of the guide plate and the diverter plate, forms multiple dispersed airflows that evenly cover the internal space of the kiln, achieving overall heating.

[0045] To further explain the specific dispersion process of the airflow, in terms of structure, the flow divider is installed on the furnace wall by a bracket. Under the constraint of the cooperation between the flow divider and the bracket, the airflow direction is towards the flow divider; the airflow will be further dispersed after being reflected by the flow divider.

[0046] The airflow first impacts the splitter plate, is then initially reflected, and subsequently impacts the guide plates. When these airflows encounter the guide plates arranged at an angle, they are reflected again, forming a complex yet uniform airflow distribution network. This multi-stage airflow dispersion mechanism enhances the uniformity of temperature inside the kiln, providing a stable thermal environment for subsequent production processes.

[0047] This adjustable airflow guide component design enhances the flexibility of furnace temperature control, providing an important guarantee for the stable production of low-bubble, low-dielectric-constant glass fibers.

[0048] The flow divider is hinged to the support and rotates around the hinge point to switch between the first and second operating states. The head of the gas input pipe is driven by a drive structure to reciprocate along its own axis.

[0049] Specifically, the drive structure consists of a servo motor, a lead screw, and a guide rail. The servo motor is fixed to the external support of the kiln and connected to the pipe head via a gear and rack structure. The rack penetrates the side wall of the kiln and is installed on the outer wall of the pipe head. A gear is installed at the working end of the servo motor. When the servo motor starts, the gear is driven by the servo motor to rotate, which in turn drives the pipe head of the gas input pipeline to perform linear reciprocating motion along the axial direction. The range of motion can be set from 15 to 40 cm according to process requirements.

[0050] Furthermore, the drive structure integrates a position feedback system, which monitors pipeline displacement data in real time via an encoder and transmits the information to the central control system. When the actual position deviates from the preset value by more than ±2cm, the system automatically triggers a correction procedure to ensure that the pipeline positioning accuracy remains within the process requirements. This closed-loop control design effectively avoids temperature fluctuations caused by pipeline position deviations, further improving the quality stability of the glass fiber.

[0051] The guide plate is equipped with an elastic torsion spring at its rotating connection point, which is in a second state when there is no external force driving it; the guide plate is connected to the outer wall of the pipe head through a connector, which can be a flexible metal cable.

[0052] One end of the flexible metal cable is fixed to the outer wall of the tube head, and the other end is connected to the guide plate. When the tube head reciprocates under the action of the drive structure, the guide plate rotates synchronously through the flexible metal cable. Under the action of the elastic torsion spring, when the tube head stops moving and there is no other external force, the guide plate automatically returns to the second state, that is, it is set at an angle to the extension direction of the gas input pipe, which is conducive to the dispersion of airflow during the overall heating of the kiln. This design makes the state switching of the guide plate more flexible and reliable, and can adjust the airflow distribution in real time according to the movement of the tube head, further optimizing the temperature control in the kiln. At the same time, the use of flexible metal cable also ensures the durability and stability of the connector, which can be used for a long time in high-temperature environments without being easily damaged, providing strong support for the continuous and stable production of low-bubble, low-dielectric-constant glass fiber.

[0053] Furthermore, the guide plates and flow dividers are made of lightweight and high-strength ceramic materials. This material can withstand the high-temperature environment inside the kiln without compromising the flexibility of rotation and operation switching due to excessive weight. Additionally, the surfaces of the guide plates and flow dividers undergo a special treatment to form a smooth glaze layer, reducing friction between the gas and the plate surface. This allows the airflow to flow more smoothly according to design requirements, further improving the effectiveness and efficiency of airflow regulation.

[0054] In summary, this invention provides a low-dielectric glass fiber, its preparation process, and equipment. The low-dielectric glass fiber is based on a SiO2-Al2O3-B2O3 system, featuring a low-alkali, fluorine-free, and environmentally friendly design. Its main components include: 50.0-58.0 wt% SiO2, 18.0-26.0 wt% B2O3, 13.0-18.0 wt% Al2O3, 0.0-5.0 wt% MgO, 2.0-5.0 wt% CaO, 0.0-0.5 wt% R2O, 0.0-1.5 wt% TiO2, and 0.0%-3.0% titanium-zirconium-hafnium ternary mixed oxide. The ionic polarizability of all metals is lower than that of alkali metals (e.g., ) and alkaline earth metals (such as By mixing these three ions in a certain proportion to replace part of the highly polarized ions, polar polarization in the glass network can be effectively reduced. Simultaneously, the radii of these three ions are highly compatible with the pore size of the glass network, enabling them to uniformly fill the network gaps and reduce the internal porosity of the glass to below 0.08%, thereby avoiding dielectric constant fluctuations caused by porosity. Its melting temperature (T1) is 1480-1520℃, refining temperature (T2) is 1500-1550℃, drawing temperature (T3) is 1420-1460℃, and the melting temperature range (ΔT) is 30-50℃. The density of the finished glass fiber is 2.42-2.48 g / cm³, and at high frequencies of 1-10 GHz, the dielectric constant (εr) does not exceed 4.2, and the bubble content does not exceed 0.05 bubbles / mm³.

[0055] This invention can: 1. It effectively reduces the generation of air bubbles in glass fibers and optimizes dielectric properties, making them more stable and reliable.

[0056] 2. In terms of the preparation process, this invention adopts a unique melting-clarification degassing-fiber drawing technology, strictly controlling the temperature and time parameters at each stage to ensure high-quality production of glass fibers.

[0057] 3. Through innovative airflow guiding component design in the production equipment, the airflow distribution pattern inside the kiln is optimized, achieving precise temperature control and further improving the uniformity and performance stability of glass fiber.

[0058] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. A low-dielectric glass fiber, characterized in that, include, 50.0-58.0 wt% SiO2, 18.0-26.0 wt% B2O3, 13.0-18.0 wt% Al2O3, 0.0-5.0wt% MgO, 2.0-5.0 wt% CaO, 0.0-0.5wt% R20, 0.0-1.5wt% TiO2, And 0.0%-3.0% of titanium-zirconium-hafnium ternary mixed oxides.

2. A method for preparing low-dielectric glass fiber, characterized in that, include: After the ingredients according to claim 1 are mixed evenly, they are put into the kiln, melted at liquid temperature T1 and kept at that temperature for 2-4 hours, then heated to T2 for clarification and degassing for 1-2 hours, and the cooling rate is controlled to T3 for drawing and forming. After gradient cooling (cooling rate 50-80℃ / min) and surface modification treatment, the finished product is obtained.

3. The preparation method according to claim 2, characterized in that, The melting temperature T1 is 1480-1520℃, the clarifying temperature T2 is 1500-1550℃, and the drawing temperature T3 is 1420-1460℃.

4. The preparation method according to claim 2, characterized in that, The melting temperature range ΔT of the melting temperature T1 is 30-50℃.

5. A production apparatus for use in the preparation method of claim 2, characterized in that, Including kilns; The gas input pipe extends into the kiln to supply the gas required for combustion in the kiln; An airflow guiding assembly includes multiple sets of guide plates located around the end of a gas input pipe and a flow divider that can move to the extension direction of the end of the input pipe. When the airflow guiding component is in the first state, the flow divider plate is detached from the extension direction of the pipe end, and the surface of the flow divider plate restricts an airflow limiting space to block the airflow along the first direction; the first direction is the flow direction of the raw material in the kiln. When the airflow guiding component is in the second state, the guide plate cancels its blocking function, and the diverter plate enters the extension direction of the pipe end and has a predetermined distance from the pipe end to block the airflow and disperse it.

6. The production equipment according to claim 5, characterized in that, The guide plate has two sets, and in the first state, the surface of the guide plate is parallel to the extension direction of the gas input pipe. In the second state, the guide plate surface is set at an angle to the extension direction of the gas input pipeline.

7. The production equipment according to claim 5, characterized in that, The flow divider is mounted on the furnace wall by a bracket. Under the constraint of the cooperation between the flow divider and the bracket, the airflow direction is towards the flow divider. The airflow will be further dispersed after being reflected by the flow divider.

8. The production equipment according to claim 7, characterized in that, The guide plate is hinged to the bracket and rotates around the hinge point to switch between the first and second states. The diverter plate is hinged to the bracket and rotates around the hinge point to switch between the first and second states.

9. The production equipment according to claim 1, characterized in that, The gas input pipeline includes a pipe head that is driven by a drive structure to reciprocate along its own axis.

10. The production equipment according to claim 9, characterized in that, The rotating connection of the guide plate is equipped with an elastic torsion spring that is in a second state when there is no external force driving it. The guide plate is connected to the outer wall of the pipe head via a connector.

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