Ceramic fiber production and processing spinning device

Abstract

The application relates to a ceramic fiber production and processing spinning device, which comprises a feeding tank and a spinning tank fixed below the feeding tank, and the inner cavity of the spinning tank is provided with a spinning cylinder, and relates to the spinning technology field. The ceramic fiber production and processing spinning device constructs a multistage collaborative feeding system of "stirring premixing-main auger preliminary conveying-double auxiliary auger shunting pressurization-double-end pressurizing piston pulsation pressurization". The main auger plays a role of preliminary sealing and pressure building while conveying; two auxiliary augers work in parallel, further compress and homogenize the melt; and the driving cylinders at two ends drive the pressurizing pistons to programmably reciprocate, and additional controllable pulse pressure is applied to the melt. The composite pressurization mode can generate pressure far higher than that of a traditional single auger, and the pressure size and fluctuation can be accurately adjusted through the stroke and speed of the cylinder, so that the spinning process is provided with extremely stable, high-pressure and flexible melt supply, and the uniform and fine fibers are obtained.

Description

Technical Field

[0001] This invention relates to the field of fiber spinning technology, specifically to a fiber spinning device for ceramic fiber production and processing. Background Technology

[0002] Ceramic fiber, as an important high-performance thermal insulation material, is widely used in metallurgy, chemical industry, aerospace and other fields. A key step in its production process—"spinning" or "blowing"—involves stretching and solidifying molten, high-temperature raw materials (such as alumina, aluminum silicate, etc.) into continuous or fixed-length fibers through high-speed rotation or airflow. This process places extremely high demands on the stability of the raw material supply and the control of temperature and pressure.

[0003] Traditional spun fiber feeding systems often employ a single screw conveyor or rely on the hydrostatic pressure of the melt for transport. However, these methods have significant drawbacks: First, when dealing with high-viscosity, non-Newtonian fluid ceramic melts, a single screw conveyor is prone to uneven discharge due to pressure fluctuations, directly affecting the uniformity of the liquid film at the spun fiber reel and the consistency of fiber diameter. Second, relying solely on gravity or simple mechanical pushing makes it difficult to establish and maintain the stable and adjustable back pressure required for the spun fiber process, especially when producing high aspect ratio fine fibers. Third, during transport, the melt is prone to localized cooling or component segregation due to uneven temperature or dead zones, affecting the final fiber properties. Therefore, there is an urgent need for a device that can achieve stable, high-pressure, and precisely controllable melt transport to improve the quality of the spun fiber process and the consistency of fiber products. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a ceramic fiber production and processing spinning device, which solves the problems mentioned above.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a ceramic fiber production and processing spinning device, comprising a feeding box and a spinning box fixed below the feeding box. The inner cavity of the spinning box contains a spinning drum. The inner cavity of the feeding box is connected to the top of the spinning drum via a pressurizing assembly. The pressurizing assembly includes a pressurizing cylinder fixed within the inner cavity of the feeding box. The pressurizing cylinder has through slots at its upper and lower ends, respectively communicating with the feeding box and the spinning drum. A stirring shaft driven by a motor is rotatably connected to the inner cavity of the feeding box. A main auger is fixedly connected to the bottom of the stirring shaft, penetrating the through slots and extending into the inner cavity of the pressurizing cylinder. A secondary auger driven by a motor is rotatably connected to the inner cavity of the pressurizing cylinder. The top end of the secondary auger penetrates the pressurizing cylinder. The pressure cylinder extends into the inner cavity of the feeding box. The inner cavity of the pressure cylinder has an auxiliary feed port surrounding the surface of the secondary auger. One end of the pressure cylinder is fixedly connected to a drive cylinder. The inner cavity of the pressure cylinder is slidably connected to a pressure piston driven by the drive cylinder. In use, raw materials are added to the feeding box. The molten raw materials are stirred and mixed by the stirring shaft, sink under gravity, and enter the pressure cylinder through the drive of the main auger. The two secondary augers rotate synchronously to drive the raw materials inside into the pressure cylinder, pressurize and convey them into the spinning drum for spinning. The reciprocating motion of the drive cylinders on both sides pushes the pressure piston inside the pressure cylinder to squeeze the raw materials. The secondary auger conveys the material for feeding and increases the pressure.

[0006] As a further aspect of the present invention: two pressure pistons are provided, and they are symmetrically arranged at both ends of the pressure cylinder.

[0007] As a further aspect of the present invention: two auxiliary augers are provided, and they are symmetrically arranged on both sides of the main auger.

[0008] As a further aspect of the present invention: the inner cavity of the spinning box is provided with a frustum guide block fixed to the ground by a support rod, the frustum guide block is arranged with a larger upper part and a smaller lower part, and the inner cavity of the spinning box is provided with an inclined surface that matches the inner cavity of the frustum guide block.

[0009] As a further aspect of the present invention, the inner cavity of the feeding box is equipped with an electric heating device.

[0010] Compared with the prior art, the present invention has the following advantages: A stable, high-pressure feeding system with multi-stage coordination and adjustable pressure has been achieved: Through innovative pressurization components, a multi-stage coordinated feeding system has been constructed, consisting of "stirring and premixing - primary auger initial conveying - dual auxiliary auger diversion and pressurization - dual-end pressurizing piston pulsed pressure application." The primary auger provides initial sealing and pressure building while conveying; the two auxiliary augers work in parallel to further compress and homogenize the melt; and the drive cylinders at both ends drive the pressurizing pistons in a programmable reciprocating motion, applying additional controllable pulse pressure to the melt. This composite pressurization method can generate pressure far exceeding that of traditional single auger systems, and the pressure magnitude and fluctuations can be precisely adjusted through cylinder stroke and speed, providing an extremely stable, high-pressure, and flexible melt supply for the spinning process, a prerequisite for obtaining uniform and fine fibers.

[0011] Optimized melt homogenization and thermal management prevent cold material and segregation: The feed hopper has a built-in electric heating device to ensure the raw material melts and is kept at a constant temperature. The stirring shaft rotates continuously, thoroughly stirring and homogenizing the melt in the hopper to prevent component precipitation and temperature stratification. The coaxial design of the stirring shaft and the main auger ensures that the melt is initially homogenized before entering the pressurized conveyor. The compact structure of the pressurized cylinder, combined with the continuous conveying of the auger, effectively reduces melt residence time and heat loss, prevents the formation of cold material lumps in the conveying channel, and ensures a high degree of uniformity in melt temperature and composition before entering the spinning drum.

[0012] An optimized fiber forming guiding environment is provided: the frustum guide block set inside the spinning box and the inclined surface formed by it and the inner wall of the box constitute a special flow field space. When the melt is thrown out of the spinning drum at high speed to form fibers, this structure can guide the hot airflow and fiber bundle to move downwards, which may play a certain role in stretching and cooling, which helps the fibers to form and collect smoothly, and reduces the disorderly scattering and adhesion of fibers inside the box. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the structure of the present invention; Figure 3 For the present invention Figure 2 A magnified view of a portion of point A in the middle.

[0014] In the diagram: 1. Feeding box; 2. Stirring shaft; 3. Stirring frame; 4. Pressure cylinder; 5. Pressure piston; 6. Drive cylinder; 7. Main auger; 8. Auxiliary feed inlet; 9. Secondary auger; 10. Inclined surface; 11. Wire spinning box; 12. Frustum guide block; 13. Support rod; 14. Wire spinning drum. Detailed Implementation

[0015] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0016] Please see Figure 1-3 This invention provides a technical solution: a ceramic fiber production and processing spinning device, comprising a feeding box 1 and a spinning box 11 fixed below the feeding box 1. A spinning drum 14 is provided inside the spinning box 11. The inner cavity of the feeding box 1 is connected to the top of the spinning drum 14 via a pressurizing assembly. The pressurizing assembly includes a pressurizing cylinder 4 fixed inside the feeding box 1. The pressurizing cylinder 4 has through slots at its upper and lower ends that communicate with the feeding box 1 and the spinning drum 14, respectively. A stirring shaft 2 driven by a motor is rotatably connected to the inner cavity of the feeding box 1. A main auger 7, which passes through the through slots and extends into the inner cavity of the pressurizing cylinder 4, is fixedly connected to the bottom of the stirring shaft 2. A secondary auger 9, driven by a motor, is rotatably connected to the inner cavity of the pressurizing cylinder 4. The top end of the secondary auger 9 passes through the pressurizing cylinder 4 and extends into the inner cavity of the feeding box 1. The inner cavity of the material box 1 and the inner cavity of the pressure cylinder 4 are provided with an auxiliary feed port 8 surrounding the surface of the auxiliary auger 9. One end of the pressure cylinder 4 is fixedly connected to a drive cylinder 6, and the inner cavity of the pressure cylinder 4 is slidably connected to a pressure piston 5 driven by the drive cylinder 6. In use, raw materials are added to the material box 1. The molten raw materials are stirred and mixed by the stirring shaft 2, sink under the action of gravity, and enter the pressure cylinder 4 by the drive of the main auger 7. The two auxiliary augers 9 rotate synchronously to drive the raw materials inside into the pressure cylinder 4, pressurize and convey them into the spinning drum 14 for spinning. The reciprocating motion of the drive cylinders 6 on both sides pushes the pressure piston 5 into the pressure cylinder 4 to squeeze the raw materials. The auxiliary auger 9 conveys the material for feeding and increases the pressure.

[0017] There are two pressurizing pistons 5, which are symmetrically arranged at both ends of the pressurizing cylinder 4.

[0018] There are two auxiliary augers 9, which are symmetrically arranged on both sides of the main auger 7.

[0019] The inner cavity of the spinning box 11 is provided with a frustum guide block 12 fixed to the ground by a support rod 13. The frustum guide block 12 is set with a larger upper part and a smaller lower part. The inner cavity of the spinning box 11 is provided with an inclined surface 10 that is adapted to the inner cavity of the frustum guide block 12.

[0020] The inner cavity of the feeding box 1 is equipped with an electric heating device.

[0021] In use, the first stage of this invention involves: raw material melting and preliminary homogenization. The ceramic raw material is fed into the feeding box 1, and the built-in electric heating device is started to heat the raw material to a completely molten state. The motor driving the stirring shaft 2 is started, and the stirring shaft drives the blades on it to continuously and thoroughly stir the melt, so as to achieve uniformity of temperature and composition and prevent precipitation.

[0022] Phase Two: Multi-stage Pressurization and Stable Delivery Primary Conveying and Initial Pressure Building: Simultaneously with stirring, the main auger 7, coaxially fixed to the stirring shaft 2, begins to rotate. The main auger blades push the melt from the bottom of the feed hopper downwards, allowing it to pass through the through-groove at the top of the pressure cylinder 4 into the internal cavity of the pressure cylinder. The rotation of the main auger serves as the initial conveying and sealing mechanism, initiating the establishment of conveying pressure.

[0023] Secondary flow diversion and pressurization: Inside the pressure cylinder 4, two auxiliary screw conveyors 9 are driven synchronously by their respective motors. They further transport and compress the melt from the main screw conveyor towards the center of the pressure cylinder, i.e., towards the outlet of the spinning drum. The symmetrical arrangement of the two auxiliary screw conveyors ensures the uniformity of melt flow. The presence of the auxiliary feed port 8 may be used for pressure balancing or auxiliary feeding.

[0024] Three-stage pulse pressurization: The drive cylinders 6 located at both ends of the pressurizing cylinder 4 operate alternately or synchronously according to the control program, pushing the pressurizing piston 5 into the cylinder. The movement of the piston applies a strong, adjustable additional pressure to the melt inside the cylinder. This pressure is superimposed with the conveying pressure of the dual augers to form a stable and high peak total output pressure, overcoming the flow resistance of the melt in the narrow pipe and at the spinning disc.

[0025] High pressure output: After the above three stages of action, the high temperature and high pressure melt is forced, continuously and stably transported through the lower through groove in the middle of the pressurizing cylinder to the lower spinning drum 14.

[0026] Phase 3: High-speed centrifugal spinning The high-pressure molten material enters the high-speed rotating spinning drum 14 or the spinning disc mounted on it. Under the action of huge centrifugal force, the molten material is thrown out from the numerous tiny holes on the edge of the spinning disc, forming countless thin streams of molten material.

[0027] Fourth stage: Fiber forming, cooling and collection The ejected molten stream, within the space of the spinning box 11, is subjected to rapid cooling and stretching by a cooling airflow (not shown in the diagram) introduced tangentially to the direction of rotation, typically compressed air or combustion gas, solidifying into solid ceramic fibers. The frustum guide block 12 and the inclined surface 10 of the box may guide and organize the initial flight path of the cooling airflow and fibers, allowing the fibers to move downwards more orderly and ultimately deposit on the collecting mesh belt or collecting device, completing the entire spinning process.

[0028] Phase 5: Continuous Regulation The entire process is continuous. By adjusting the stirring speed, the rotation speed of the main / auxiliary auger, and the pressure and reciprocating frequency of the drive cylinder 6, the melt flow rate and pressure supplied to the spinning drum can be controlled in real time and with precision, thereby flexibly adjusting process parameters such as fiber output and diameter.

[0029] 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 ceramic fiber production and processing spinning device, comprising a feeding box (1) and a spinning box (11) fixed below the feeding box (1), wherein the inner cavity of the spinning box (11) is provided with a spinning cylinder (14), characterized in that: The inner cavity of the feed box (1) is connected to the top of the spinning drum (14) via a pressurizing assembly. The pressurizing assembly includes a pressurizing cylinder (4) fixed in the inner cavity of the feed box (1). The pressurizing cylinder (4) has through slots at the top and bottom of its middle section that communicate with the feed box (1) and the spinning drum (14) respectively. The inner cavity of the feed box (1) is rotatably connected to a stirring shaft (2) driven by a motor. The bottom of the stirring shaft (2) is fixedly connected to a main strand that passes through the through slots and extends into the inner cavity of the pressurizing cylinder (4). The inner cavity of the pressure cylinder (4) is rotatably connected to a secondary auger (9) driven by a motor. The top end of the secondary auger (9) passes through the pressure cylinder (4) and extends to the inner cavity of the feed box (1). The inner cavity of the pressure cylinder (4) is provided with an auxiliary feed port (8) surrounding the surface of the secondary auger (9). One end of the pressure cylinder (4) is fixedly connected to a drive cylinder (6). The inner cavity of the pressure cylinder (4) is slidably connected to a pressure piston (5) driven by the drive cylinder (6).

2. The ceramic fiber production and processing spinning device according to claim 1, characterized in that: Two pressurizing pistons (5) are provided and are symmetrically arranged at both ends of the pressurizing cylinder (4).

3. The ceramic fiber production and processing spinning device according to claim 1, characterized in that: There are two auxiliary augers (9), which are symmetrically arranged on both sides of the main auger (7).

4. The ceramic fiber production and processing spinning device according to claim 1, characterized in that: The inner cavity of the spinning box (11) is provided with a frustum guide block (12) fixed to the ground by a support rod (13). The frustum guide block (12) is set with a larger upper part and a smaller lower part. The inner cavity of the spinning box (11) is provided with an inclined surface (10) that is adapted to the inner cavity of the frustum guide block (12).

5. The ceramic fiber production and processing spinning device according to claim 1, characterized in that: The inner cavity of the feeding box (1) is equipped with an electric heating device.

Images