Glass fiber manufacturing equipment and glass fiber manufacturing method

Abstract

The invention belongs to the technical field of glass fiber preparation, and discloses glass fiber manufacturing equipment and a glass fiber manufacturing method. The glass fiber manufacturing equipment comprises an extrusion assembly, a rough rolling assembly, a traction assembly and a plurality of fine rolling assemblies. The extrusion assembly is provided with a liquid outlet pipe extending in the horizontal direction. The rough rolling assembly comprises two rough rolling rollers, an annular first groove is formed in the circumferential surface of each rough rolling roller, a rough rolling outlet is formed in the tangent position of the two first grooves, and an outlet of the liquid outlet pipe is right opposite to the rough rolling outlet; the multiple fine rolling assemblies are sequentially arranged on the downstream portion of the rough rolling assembly, each fine rolling assembly comprises two fine rolling rollers, the circumferential face of each fine rolling roller is provided with an annular second groove, and every two corresponding second grooves form a fine rolling outlet in the tangent position; the traction assembly is arranged on the downstream of the last fine rolling assembly and comprises two tangent traction rollers. According to the invention, the wire drawing length can be easily changed, and the purchase cost of equipment is reduced on the premise that the diameters of produced glass wires are controlled to be consistent.

Description

Technical Field

[0001] The present invention relates to the technical field of glass fiber preparation, and in particular to glass fiber manufacturing equipment and a glass fiber manufacturing method. Background Art

[0002] During the production and research and development of glass, it is often necessary to test the three points (annealing point, strain point, softening point) or other properties of the glass. Currently, the mainstream preparation method of glass fibers used for testing the three points of glass is still manual drawing, which is highly dependent on the operator's experience and skills. In addition, the diameter, length, and drawing quality of the glass fibers are difficult to maintain consistent, which has a significant impact on the test results.

[0003] There are already some patents for glass drawing equipment. For example, CN202311110482.1 uses gravity and a gas pressurized device to prepare glass filaments of different diameters through template extrusion. However, due to the vertical drawing method, it is limited by the actual operating space, which limits the length of the glass filaments. Lifting the equipment is not conducive to operation. At the same time, the wire drawing relies on gravity, and the wire diameter will become thinner and thinner, and the consistency of the wire diameter of the glass filaments cannot be completely guaranteed. In the CN202221113967.7 patent, the space constraints are smaller, and the drawing speed can be controlled by the traction roller to control the diameter of the glass filament, but it relies on a set of visual measurement systems, which increases the complexity and cost of the drawing equipment. Other similar patents basically have such problems, which is not conducive to promotion.

[0004] Therefore, it is urgent to design a glass fiber manufacturing device and a glass fiber manufacturing method to solve the above problems. Summary of the Invention

[0005] One object of the present invention is to provide a glass filament manufacturing device that can easily change the drawing length and reduce the purchase cost of the equipment while controlling the diameter of the produced glass filaments to be consistent.

[0006] Another object of the present invention is to provide a method for manufacturing glass filaments, which can easily change the drawing length and reduce production costs while controlling the diameter of the produced glass filaments to be consistent.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] Glass fiber manufacturing equipment, including:

[0009] An extrusion assembly having a liquid outlet pipe extending in a first direction, through which glass liquid with a certain viscosity can flow out, wherein the first direction is a horizontal direction;

[0010] The roughing assembly includes two roughing rollers, the circumferential surfaces of the two roughing rollers being arranged tangentially to each other, each roughing roller having an annular first groove formed on its circumferential surface, the two first grooves forming a roughing outlet at a tangential position, and the outlet of the liquid outlet pipe being directly opposite to the roughing outlet;

[0011] A plurality of fine rolling assemblies are sequentially arranged downstream of the rough rolling assembly, the fine rolling assemblies comprising two fine rolling rollers, the circumferential surfaces of the two fine rolling rollers being arranged tangentially to each other, an annular second groove being provided on the circumferential surface of each fine rolling roller, two corresponding second grooves forming a fine rolling outlet at a tangential position, and the cross-sectional areas of the fine rolling outlets of the plurality of fine rolling assemblies gradually decreasing from upstream to downstream, with the cross-sectional area of ​​the first fine rolling outlet being smaller than the cross-sectional area of ​​the rough rolling outlet;

[0012] The traction assembly is arranged downstream of the last of the above-mentioned fine rolling assembly. The above-mentioned traction assembly includes two tangent traction rollers. The above-mentioned glass liquid can sequentially pass through the above-mentioned rough rolling outlet, several above-mentioned fine rolling outlets and between the two above-mentioned traction rollers to form glass fibers.

[0013] As an optional solution, N first grooves are arranged on each of the roughing rollers at intervals along the axial direction, where N≥2, and the second grooves are arranged in a one-to-one correspondence with the first grooves.

[0014] As an optional solution, the cross-sectional shapes of the N first grooves are of M types, where 1≤M≤N.

[0015] As an optional solution, the extrusion assembly further includes:

[0016] A heating tank capable of heating the glass therein to a molten state, the heating tank being provided with a liquid outlet, the liquid outlet pipe being connected to the liquid outlet;

[0017] The valve is arranged at the liquid outlet, and the valve can be selectively opened or closed.

[0018] As an optional solution, the liquid outlet pipe includes:

[0019] a tube body, one end of which is connected to the liquid outlet and the other end of which is directly opposite to the rough rolling outlet;

[0020] The first heating element is installed on the tube body, and the first heating element can maintain the temperature of the glass liquid at a first preset temperature.

[0021] As an optional solution, the heating tank can maintain the temperature of the glass liquid at a second preset temperature, and the first preset temperature is lower than the second preset temperature.

[0022] As an optional solution, one end of the tube body connected to the liquid outlet is cylindrical, and the other end is conical.

[0023] As an optional solution, the viscosity of the glass liquid squeezed out from the liquid outlet pipe is 10 3 dPa·s-10 4 within the dPa·s range; and / or

[0024] When the glass liquid is between the rough rolling assembly and the plurality of fine rolling assemblies, the viscosity of the glass liquid is 10 5 dPa·s-10 7 dPa·s; and / or

[0025] After the glass liquid passes through the last fine rolling assembly, its viscosity is greater than 10 11 dPa·s.

[0026] A glass filament manufacturing method is provided, wherein the glass filament manufacturing apparatus is used to manufacture the glass filament, and the glass filament manufacturing method comprises:

[0027] S10: placing the glass into the extrusion assembly, which heats the glass to melt it and form the glass liquid with a certain viscosity, and the glass liquid is squeezed out from the liquid outlet pipe under the action of gravity;

[0028] S20: The molten glass passes through a rough rolling outlet, and then passes through several fine rolling outlets, and is then pulled downstream by the pulling assembly to form glass fibers.

[0029] As an optional solution, the liquid outlet pipe can heat the glass liquid to keep the viscosity of the glass liquid at 10 3 dPa·s-10 4 within the range of dPa·s.

[0030] The beneficial effects of the present invention are:

[0031] The present invention provides a glass fiber manufacturing device. By setting the extension direction of a liquid outlet pipe to be horizontal, when the glass liquid is squeezed out, it first passes through a rough rolling assembly and then passes through several fine rolling assemblies, thereby manufacturing the glass fiber through a groundbreaking rolling method. On the one hand, the glass fiber is manufactured horizontally and is not restricted by the height of the equipment. If the length of the glass fiber needs to be changed, it is only necessary to adaptively cut more or less glass fiber by a certain distance at the downstream end of the pulling assembly. The unshaped glass fiber is the intermediate glass fiber, and the thickness of the unshaped glass fiber at each stage is determined by the rough rolling outlet and each fine rolling outlet. After the glass fiber is drawn out from the last fine rolling outlet and becomes the shaped glass fiber, the shape of the glass fiber is fixed. Therefore, the device does not require a visual measurement system, which greatly reduces the cost of purchasing and maintaining the equipment.

[0032] The present invention also provides a glass filament manufacturing method. By adopting the above-mentioned glass filament manufacturing equipment, the drawing length can be changed relatively easily, thereby reducing the production cost under the premise of controlling the diameter of the produced glass filaments to be consistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 1 is a schematic structural diagram of a glass fiber manufacturing device provided by an embodiment of the present invention;

[0034] Figure 2 Schematic diagram of the structure of the rough rolling assembly and the fine rolling assembly provided by an embodiment of the present invention;

[0035] Figure 3 It is a schematic structural diagram of a rough rolling assembly provided in another embodiment of the present invention.

[0036] In the picture:

[0037] 10. Extrusion assembly; 11. Liquid outlet pipe; 111. Tube body; 112. First heating element; 12. Heating tank; 121. Liquid outlet; 13. Valve;

[0038] 20. Roughing assembly; 21. Roughing roller; 211. First trough; 22. Roughing outlet;

[0039] 30. Fine rolling assembly; 31. Fine rolling roller; 311. Second trough; 32. Fine rolling outlet;

[0040] 40. Traction assembly; 41. Traction roller; 210. Glass liquid; 220. Intermediate glass filament; 230. Shaped glass filament. DETAILED DESCRIPTION

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0042] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0043] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0044] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0045] This embodiment provides a glass fiber manufacturing device that can easily change the drawing length and reduce the equipment procurement cost while maintaining the consistency of the diameter of the produced glass fibers. Figure 1 and Figure 2 As shown, the glass fiber manufacturing equipment includes an extrusion assembly 10, a roughing assembly 20, a pulling assembly 40 and a plurality of fine rolling assemblies 30. The extrusion assembly 10 has a liquid outlet pipe 11 extending along a first direction (X direction in the figure), and glass liquid 210 with a certain viscosity can flow out of the liquid outlet pipe 11. The first direction is the horizontal direction; the roughing assembly 20 includes two roughing rollers 21. The circumferential surfaces of the two roughing rollers 21 are arranged tangentially. An annular first groove 211 is provided on the circumference of each roughing roller 21. The two first grooves 211 form a roughing outlet 22 at the tangential position. The outlet of the liquid outlet pipe 11 is opposite to the roughing outlet 22. The plurality of fine rolling assemblies 30 are sequentially arranged downstream of the roughing assembly 20. The fine rolling assembly 30 includes two fine rolling rollers 31, and the circumferential surfaces of the two fine rolling rollers 31 are arranged tangentially. An annular second groove 311 is provided on the circumferential surface of each fine rolling roller 31, and two corresponding second grooves 311 form a fine rolling outlet 32 ​​at the tangential position. From upstream to downstream, the cross-sectional area of ​​the fine rolling outlets 32 of several fine rolling assemblies 30 gradually decreases, and the cross-sectional area of ​​the first fine rolling outlet 32 ​​is smaller than the cross-sectional area of ​​the rough rolling outlet 22; the traction assembly 40 is arranged downstream of the last fine rolling assembly 30, and the traction assembly 40 includes two tangential traction rollers 41. The glass liquid 210 can pass through the rough rolling outlet 22, several fine rolling outlets 32 and between the two traction rollers 41 in sequence to form glass fibers.

[0046] The above-mentioned glass fiber manufacturing equipment sets the extension direction of the liquid outlet pipe 11 to be horizontal. When the glass liquid 210 is extruded, it first passes through the rough rolling component 20 and then passes through several fine rolling components 30, thereby manufacturing glass fibers through rolling in a breakthrough manner. On the one hand, the horizontal manufacturing of glass fibers is not limited by the height of the equipment. If the length of the glass fibers needs to be changed, it is only necessary to adaptively cut more or less glass fibers for a certain distance at the downstream end of the pulling component 40; the unshaped glass fibers are intermediate glass fibers 220, and their thickness at each stage is determined by the rough rolling outlet 22 and each fine rolling outlet 32. After the glass fibers are drawn out from the last fine rolling outlet 32 ​​and become shaped glass fibers 230, the shape of the glass fibers is fixed. Therefore, the equipment does not require a visual measurement system, which greatly reduces the cost of purchasing and maintaining the equipment.

[0047] It should be noted that, in this embodiment, Figure 1 As shown, the fine rolling assembly 30 is provided in one group. In other embodiments, the fine rolling assembly 30 can be provided in more groups according to the final thickness of the glass filaments, which is not limited here.

[0048] In this embodiment, Figure 2 As shown, the cross sections of the first groove 211 and the second groove 311 are both semicircular, so the rough rolling outlet 22 and the fine rolling outlet 32 ​​are circular, and the cross section of the glass filament is also circular.

[0049] For a set of equipment, only one glass fiber is rolled at a time, which is relatively inefficient.

[0050] In order to solve the above problems, Figure 1 and Figure 3 As shown, each roughing roller 21 is provided with N first grooves 211 spaced apart in the axial direction, where N ≥ 2. The second grooves 311 (the fine rolling assembly 30 is not shown) are provided in a one-to-one correspondence with the first grooves 211. In other words, each roughing roller 21 can simultaneously roll N glass filaments, greatly improving the efficiency of rolling glass filaments.

[0051] As test requirements change, R&D and market demands for diversified glass fibers with special cross-sections increase, circular glass fibers can no longer meet current needs. If glass fibers of other shapes need to be manufactured, multiple devices are often required, and procurement costs increase exponentially.

[0052] To solve the above problems, see Figure 3 The N first grooves 211 have M different cross-sectional shapes, where 1≤M≤N. In other words, the glass filament manufacturing equipment provided in this embodiment can simultaneously produce multiple glass filaments with different cross-sectional shapes by changing the number and shape of the first grooves 211 on the roughing roller 21 and the second grooves 311 on the fine roller 31, thereby improving production convenience and adaptability to customer needs.

[0053] It should be noted that, since the glass liquid 210 has a certain viscosity when it is squeezed out of the liquid outlet pipe 11, even if the end of the liquid outlet pipe 11 is not in close contact with the rough rolling outlet 22 (which can be understood here as the inlet of the glass liquid 210), it can ensure that the glass liquid 210 can smoothly enter the rough rolling outlet 22 without overflowing to other positions.

[0054] Optionally, one end of the tube body 111 communicating with the liquid outlet 121 is cylindrical, and the other end is conical.

[0055] Specifically, for Figure 2 In the scheme, the outlet cross-section of the liquid outlet pipe 11 can be set to the same size as the roughing outlet 22. Figure 3 In the above scheme, the outlet of the liquid outlet pipe 11 can be configured as a flat mouth, and the outlet can be directly opposite the four roughing outlets 22. The above schemes are all schemes in which the liquid outlet pipe 11 gradually narrows into a tapered shape at the liquid outlet end. As an optional scheme, the outlet of the liquid outlet pipe 11 can also be configured to correspond one to one with the number of roughing outlets 22, which is not limited here.

[0056] for Figure 3 In general, there are four rough rolling outlets 22. For example, the shape of the rough rolling outlet 22 can be circular, rectangular, or four-pointed star. In other embodiments, the shape of the rough rolling outlet 22 can also be set to be elliptical, etc., and the shapes of the two interlocking first grooves 211 can be different to achieve the production of special-shaped glass fibers with asymmetric cross-sections.

[0057] As for the pulling roller 41, its structure should be almost the same as that of the last fine roller 31 to prevent the shaped glass filament 230 from being squeezed. Its structure will not be described in detail here.

[0058] Of course, each group of "rollers" mentioned above is provided with a driving member for driving the rotation thereof, and its structure is not described in detail here.

[0059] Alternatively, as Figure 1 As shown, the extrusion assembly 10 also includes a heating tank 12 and a valve 13. The heating tank 12 heats the glass therein to a molten state. The heating tank 12 defines a liquid outlet 121, to which the liquid outlet pipe 11 is connected. The valve 13 is disposed at the liquid outlet 121 and can be selectively opened or closed. This arrangement provides a relatively large volume for the heating tank 12, allowing the molten glass 210 to flow from the heating tank 12 into the liquid outlet pipe 11 under its own gravity and be extruded.

[0060] Alternatively, as Figure 1As shown, the liquid outlet pipe 11 includes a tube body 111 and a first heating element 112. One end of the tube body 111 is connected to the liquid outlet 121, and the other end is directly opposite the rough rolling outlet 22. The first heating element 112 is installed in the tube body 111 and can maintain the temperature of the molten glass 210 at a first preset temperature. This arrangement can prevent the molten glass 210 from cooling too quickly within the liquid outlet pipe 11, making it difficult to be squeezed out.

[0061] It should be noted that a second heating element (not shown in the figure) is provided in the heating tank 12 , which also plays a heating role to ensure the fluidity of the glass liquid 210 .

[0062] Optionally, the heating tank 12, or the second heating element, can maintain the temperature of the molten glass 210 at a second preset temperature, where the first preset temperature is lower than the second preset temperature. It is understood that the higher temperature of the molten glass 210 in the heating tank 12 ensures the fluidity of the molten glass 210 therein and ensures that the molten glass 210 can smoothly enter the liquid outlet pipe 11 under the action of gravity. Furthermore, the first preset temperature being lower than the second preset temperature ensures that the viscosity of the molten glass 210 in the liquid outlet pipe 11 is increased, thereby preventing the molten glass 210 from overflowing when it passes from the liquid outlet pipe 11 to the rough rolling outlet 22.

[0063] Optionally, the viscosity of the glass liquid 210 squeezed out from the liquid outlet pipe 11 is 10 3 dPa·s-10 4 dPa·s range; the glass liquid 210 within this range can ensure that the glass liquid 210 does not overflow outward from the liquid outlet pipe 11 to the rough rolling outlet 22.

[0064] Optionally, when the glass liquid 210 is between the rough rolling assembly 20 and the plurality of fine rolling assemblies 30, the viscosity of the glass liquid 210 is 10 5 dPa·s-10 7 dPa·s; when the viscosity of the glass liquid 210 is within this range, shaping can be performed, that is, the state of the intermediate glass filament 220.

[0065] Optionally, after the glass liquid 210 passes through the last fine rolling assembly 30, its viscosity is greater than 10 11 At this viscosity, the shaped glass filaments 230 have been formed, and the cross-sectional shape of the glass filaments will not be changed after passing through the traction rollers 41.

[0066] It should be noted that the viscosity of the glass filaments extending from the last fine rolling assembly 30 can be ensured to be greater than 10 11dPa·s. If the viscosity is small, the fine rolling assembly 30 is moved downstream to extend the cooling time of the glass filaments. The rotation speed of the roughing roller 21 and the fine rolling roller 31 can also be adjusted to ensure the constant glass discharge amount and prevent the occurrence of material piling or breaking.

[0067] In addition, for Figure 3 For the solution, the last fine rolling assembly 30 should ensure that the viscosity of all glass fibers is greater than 10 11 dPa·s.

[0068] This embodiment further provides a method for manufacturing glass filaments, which uses the above-mentioned glass filament manufacturing apparatus to manufacture glass filaments. The method for manufacturing glass filaments includes:

[0069] S10: Putting glass into the extrusion assembly 10, the extrusion assembly 10 heats the glass to melt the glass to form a glass liquid 210 with a certain viscosity, and the glass liquid 210 is squeezed out from the liquid outlet pipe 11 under the action of gravity;

[0070] S20: The molten glass 210 passes through the roughing outlet 22 and then through several fine-rolling outlets 32 before being drawn downstream by the drawing assembly 40 to form glass filaments. The above-described glass filament manufacturing method, utilizing the above-described glass filament manufacturing equipment, can easily adjust the drawn length, thereby reducing production costs while maintaining a consistent diameter of the produced glass filaments.

[0071] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Glass fiber manufacturing equipment, characterized in that: include: An extrusion assembly (10) has a liquid outlet pipe (11) extending in a first direction, through which glass liquid (210) with a certain viscosity can flow out, and the first direction is a horizontal direction; A rough rolling assembly (20) comprises two rough rolling rollers (21), the circumferential surfaces of the two rough rolling rollers (21) being arranged tangentially to each other, an annular first groove (211) being provided on the circumferential surface of each rough rolling roller (21), the two first grooves (211) forming a rough rolling outlet (22) at a tangential position, and the outlet of the liquid outlet pipe (11) being directly opposite to the rough rolling outlet (22); A plurality of fine rolling assemblies (30) are sequentially arranged downstream of the rough rolling assembly (20), the fine rolling assemblies (30) comprising two fine rolling rollers (31), the circumferential surfaces of the two fine rolling rollers (31) being arranged tangentially, an annular second groove (311) being provided on the circumferential surface of each fine rolling roller (31), two corresponding second grooves (311) forming a fine rolling outlet (32) at a tangential position, and the cross-sectional areas of the fine rolling outlets (32) of the plurality of fine rolling assemblies (30) gradually decreasing from upstream to downstream, and the cross-sectional area of ​​the first fine rolling outlet (32) being smaller than the cross-sectional area of ​​the rough rolling outlet (22); A traction assembly (40) is arranged downstream of the last fine rolling assembly (30), and the traction assembly (40) includes two tangential traction rollers (41). The glass liquid (210) can sequentially pass through the rough rolling outlet (22), a plurality of the fine rolling outlets (32) and between the two traction rollers (41) to form glass fibers.

2. The glass fiber manufacturing equipment according to claim 1, characterized in that: N first grooves (211) are arranged on each roughing roller (21) at intervals along the axial direction, where N≥2, and the second grooves (311) are arranged in a one-to-one correspondence with the first grooves (211).

3. The glass fiber manufacturing equipment according to claim 2, characterized in that: The cross-sectional shapes of the N first grooves (211) are of M types, 1≤M≤N.

4. The glass fiber manufacturing equipment according to any one of claims 1 to 3, characterized in that: The extrusion assembly (10) further comprises: A heating tank (12) is capable of heating the glass therein to a molten state, the heating tank (12) is provided with a liquid outlet (121), and the liquid outlet pipe (11) is connected to the liquid outlet (121); A valve (13) is provided at the liquid outlet (121), and the valve (13) can be selectively opened or closed.

5. The glass fiber manufacturing equipment according to claim 4, characterized in that: The liquid outlet pipe (11) comprises: A tube body (111), one end of which is connected to the liquid outlet (121) and the other end of which is opposite to the rough rolling outlet (22); A first heating element (112) is installed on the tube body (111), and the first heating element (112) can maintain the temperature of the glass liquid (210) at a first preset temperature.

6. The glass fiber manufacturing equipment according to claim 5, characterized in that: The heating tank (12) can maintain the temperature of the glass liquid (210) at a second preset temperature, wherein the first preset temperature is lower than the second preset temperature.

7. The glass fiber manufacturing equipment according to claim 5, characterized in that: One end of the tube body (111) communicating with the liquid outlet (121) is cylindrical, and the other end is conical.

8. The glass fiber manufacturing equipment according to any one of claims 1 to 3, characterized in that: The viscosity of the glass liquid (210) squeezed out from the liquid outlet pipe (11) is 10 3 dPa·s-10 4 within the dPa·s range; and / or When the glass liquid (210) is between the rough rolling assembly (20) and the plurality of fine rolling assemblies (30), the viscosity of the glass liquid (210) is 10 5 dPa·s-10 7 dPa·s; and / or After the glass liquid (210) passes through the last fine rolling assembly (30), its viscosity is greater than 10 11 dPa·s.

9. A method for producing glass fibers, characterized in that: Glass filaments are manufactured using the glass filament manufacturing apparatus according to any one of claims 1 to 8, wherein the glass filament manufacturing method comprises: S10: placing glass into the extrusion assembly (10); the extrusion assembly (10) heats the glass to melt the glass, forming the glass liquid (210) having a certain viscosity; the glass liquid (210) is extruded from the liquid outlet pipe (11) under the action of gravity; S20: The glass liquid (210) passes through the rough rolling outlet (22), then passes through a plurality of fine rolling outlets (32), and is then pulled downstream by the pulling assembly (40) to form glass fibers.

10. The method for producing glass fibers according to claim 9, wherein: The liquid outlet pipe (11) can heat the glass liquid (210) so as to keep the viscosity of the glass liquid (210) at 10 3 dPa·s-10 4 within the range of dPa·s.

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