Processing method and mold for outer hexagonal inner round neutral borosilicate glass tube

Abstract

The present invention relates to the technical field of glass tube processing, and in particular to a processing method for a neutral borosilicate glass tube with an outer hexagonal shape and an inner round shape, comprising the following steps: S1, respectively weighing and mixing each raw material; S2, adding the mixed raw materials into a kiln, heating to melt each raw material, obtaining a slurry, and the slurry enters a working pool and then enters a material channel; S3, conveying the slurry to a platinum material channel through the material channel, stirring the slurry with a stirring rod, and finally flowing into a muffle furnace; S4, the slurry flows into the muffle furnace and is wrapped on a rotating tube with a predetermined inclination angle, and while the slurry is wound around the rotating tube and descends due to gravity, a traction machine is used to traction the slurry forward, and with the cooperation of a fan, the slurry forms a glass tube prototype with both inner and outer circles during the traction process; the processing steps of the neutral borosilicate glass tube with an outer hexagonal shape and an inner round shape can be reduced, and the appearance of the glass tube prototype can be plasticized with the cooperation of an outer hexagonal shape and an inner round shape mold.

Description

Technical Field

[0001] The present invention relates to the technical field of glass tube processing, and in particular to a processing method and a processing mold for a neutral borosilicate glass tube with an outer hexagonal shape and an inner circular shape. Background Art

[0002] In the process of glass tube production, the commonly used production processes are Danner and Vello. Compared with the Danner method, the Vello method has the advantages of large production capacity and higher glass tube quality, but the Vello method has higher production control requirements for kilns and feed channels, and requires a larger investment. At the same time, in both the Danner and Vello processes, the internal end, the bowl or the rotating tube is coordinated with the air and the speed of the traction machine to form a glass tube that is round inside and outside.

[0003] However, the existing technology only has neutral borosilicate glass tubes that are round inside and outside. However, neutral borosilicate glass tubes that are round inside and outside have poor stacking stability and are prone to secondary scratches, which affects the appearance. In addition, the shape is single and cannot meet the personalized needs of post-processing high-end products. Summary of the invention

[0004] A technical problem to be solved by the present disclosure is that in the prior art, neutral borosilicate glass tubes that are round both inside and outside have poor stacking stability and are prone to secondary scratches, which affects the appearance.

[0005] In order to solve the above technical problems, the embodiment of the present disclosure provides a processing method of a neutral borosilicate glass tube with an outer hexagonal shape and an inner round shape, comprising the following steps: S1, weighing and mixing each raw material separately; S2, adding the mixed raw materials into a kiln, heating to melt each raw material, obtaining a slurry, and the slurry enters the working pool and then enters the material channel; S3, transporting the slurry to the platinum material channel through the material channel, stirring the slurry with a stirring rod, and finally flowing into the muffle furnace; S4, the slurry flows into the muffle furnace and is wrapped on a rotating tube with a predetermined inclination angle. While the slurry is wound around the rotating tube, it is dropped by gravity, and the slurry is pulled forward by a traction machine, and with the cooperation of the fan, the slurry forms a glass tube prototype with both inside and outside being round during the traction process; S5, adding a heat preservation flame at the rear end of the rotating tube and the front end of the runway; S6, entering the front end of the runway after reaching the shaping temperature, and adding an outer hexagonal inner round mold at the front end of the runway to shape the appearance of the glass tube prototype and form an outer hexagonal inner round glass tube.

[0006] In some embodiments, the temperature of the working pool and the material channel is 970°C-1020°C.

[0007] In some embodiments, in step S2, a heater is provided in the material channel, and the heater is connected to a controller, and the controller is used to control the opening and closing of the heater.

[0008] In some embodiments, in step S4, the air volume of the fan is controlled at 8-9.5 N / m 3 / between.

[0009] In some embodiments, in step S4, a negative pressure vacuum pipe is provided at the front end of the runway.

[0010] In some embodiments, in step S4, a wind volume sensing element is provided at the rear end of the rotating tube, and the wind volume sensing element is used to detect the wind volume and wind pressure of the rotating tube.

[0011] In some embodiments, in step S5, a temperature sensor is also included, and the temperature sensor is used to detect the temperature in the muffle furnace.

[0012] In some embodiments, step S6 further includes using a dropper to intermittently drip oil onto the front end of the outer hexagonal inner circular mold.

[0013] The present disclosure also provides a processing mold for a neutral borosilicate glass tube with a hexagonal outer shape and a circular inner shape, which is applied to a processing method for a neutral borosilicate glass tube with a hexagonal outer shape and a circular inner shape, comprising: a fixing part with a mounting hole provided therein; an eccentric rotating part, which is arranged in the mounting hole and has six rotating shafts provided therein, and the six rotating shafts are sequentially enclosed to form a hexagonal structure.

[0014] In some embodiments, the fixing member includes a first fixing block and a second fixing block, and the first fixing block and the second fixing block are provided with an arc-shaped groove, and the two arc-shaped grooves together constitute a mounting hole.

[0015] Through the above technical scheme, the processing method of the neutral borosilicate glass tube with hexagonal outer surface and round inner surface provided by the present invention includes the following steps: S1, weighing and mixing each raw material separately; S2, adding the mixed raw materials into the kiln, heating to melt each raw material, obtaining a slurry, and the slurry enters the working pool and then enters the material channel; S3, transporting the slurry to the platinum material channel through the material channel, stirring the slurry with a stirring rod, and finally flowing into the muffle furnace; S4, the slurry flows into the muffle furnace and is wrapped on a rotating tube with a predetermined inclination angle. While the slurry is wound around the rotating tube, it is dropped by gravity, and the slurry is pulled forward by a traction machine, and with the cooperation of the fan, the slurry forms a glass tube prototype with round inner and outer surfaces during the traction process; S5, adding a heat preservation flame at the rear end of the rotating tube and the front end of the runway; S6, entering the front end of the runway after reaching the shaping temperature, and adding a hexagonal outer surface and round inner surface mold at the front end of the runway to shape the appearance of the glass tube prototype and form a hexagonal outer surface and round inner surface glass tube.

[0016] By adopting the above processing method, the processing steps of the neutral borosilicate glass tube with a hexagonal outer shape and a circular inner shape can be reduced. At the same time, in conjunction with the hexagonal outer shape and a circular inner shape mold, the appearance of the glass tube prototype can be plasticized so that the glass tube prototype is plasticized into a neutral borosilicate glass tube with a hexagonal outer shape and a circular inner shape. Since the outer wall cross-section of the neutral borosilicate glass tube with a hexagonal outer shape and a circular inner shape is hexagonal, the stability of the stacking of the neutral borosilicate glass tube can be guaranteed, and random movement after stacking can be avoided, thereby avoiding secondary scratches, thereby ensuring the beauty of the appearance of the neutral borosilicate glass tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a principle diagram of a method for processing a neutral borosilicate glass tube with a hexagonal outer shape and a circular inner shape disclosed in an embodiment of the present disclosure;

[0019] Figure 2 It is a partial principle diagram of the processing method of the outer hexagonal inner circular neutral borosilicate glass tube disclosed in the embodiment of the present disclosure;

[0020] Figure 3 It is a principle diagram of the dropper oil dripping in the processing method of the neutral borosilicate glass tube with outer hexagonal and inner circular shape disclosed in the embodiment of the present disclosure;

[0021] Figure 4 It is a schematic structural diagram of the outer hexagonal inner circular mold disclosed in an embodiment of the present disclosure;

[0022] Figure 5 It is a structural schematic diagram of the eccentric rotating part of the outer hexagonal inner circular mold disclosed in the embodiment of the present disclosure;

[0023] Figure 6 It is a structural schematic diagram of the first fixing block of the outer hexagonal inner circular mold disclosed in the embodiment of the present disclosure;

[0024] Figure 7 It is a cross-sectional view of the outer hexagonal inner circular mold disclosed in an embodiment of the present disclosure.

[0025] Description of reference numerals:

[0026] 1. Kiln; 2. Working pool; 3. Material channel; 4. Platinum material channel; 5. Stirring rod; 6. Muffle furnace; 7. Rotating tube; 8. Tractor; 9. Insulating flame; 10. Hexagonal outer and circular inner mold; 11. Heater; 12. Controller; 13. Fan; 14. Runway; 15. Hexagonal outer and circular inner glass tube; 16. Air volume sensing element; 17. Temperature sensor; 18. Titrator; 19. Fixing part; 20. Mounting hole; 21. Eccentric rotating part; 22. Rotating shaft; 23. First fixing block; 24. Second fixing block; 25. Arc groove; 26. Oil storage tank; 27. Frequency converter; 28. Danner machine; 29. ​​Natural gas electronic proportional valve; 30. Mounting block; 31. Threaded hole. DETAILED DESCRIPTION

[0027] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0028] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0029] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0030] In addition, the words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0031] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0032] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0033] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0034] See also Figures 1 to 7 As shown, the present disclosure provides a processing method for a neutral borosilicate glass tube with an outer hexagonal shape and an inner round shape, comprising the following steps: S1, weighing and mixing the raw materials respectively; S2, adding the mixed raw materials into a kiln 1, heating and melting the raw materials to obtain a liquid material, and the liquid material enters a working pool 2 and then enters a material channel 3; S3, conveying the liquid material into a platinum material channel 4 through the material channel 3, and stirring the liquid material with a stirring rod 5, and finally flowing into a muffle furnace 6; S4, the liquid material flows into the muffle furnace 6 and is wrapped in a predetermined inclination angle. The liquid material is wound around the rotating tube 7 and descends due to gravity. The traction machine 8 is used to pull the liquid material forward, and with the cooperation of the fan 13, the liquid material forms a glass tube prototype with both inside and outside being round during the pulling process; S5, at the rear end of the rotating tube 7 and the front end of the runway 14, a heat preservation flame 9 is added; S6, after reaching the shaping temperature, it enters the front end of the runway 14, and a hexagonal outer and circular inner mold 10 is added to the front end of the runway 14 to shape the appearance of the glass tube prototype and form a hexagonal outer and circular inner glass tube 15.

[0035] By weighing each raw material separately, it is convenient to prepare the best mixing ratio for making the outer hexagonal inner round glass tube 15, and then add the mixed raw materials into the kiln 1, and use the kiln 1 to heat the raw materials so that the raw materials melt, that is, change from solid to liquid, and then enter the working pool 2, and then enter the material channel 3 from the working pool 2;

[0036] In step S2, a heater 11 is provided in the channel 3. When the temperature in the channel 3 does not reach a predetermined value, the heater 11 can be controlled by the controller 12, that is, the liquid in the channel 3 is heated so that the liquid in the channel 3 reaches a predetermined stability.

[0037] Specifically, the deformation point of glass is equivalent to the temperature range of viscosity of 1005-1011 Pa·s. Here, the real-time temperature of the liquid is fed back to the controller 12 through the temperature sensor of the material channel 3. It is known that the viscosity of glass is 1000 Pa·s when heated at a temperature of 1450°, and the viscosity increases by 1.5 Pa·s for every 50°C drop. Therefore, the controller 12 controls the temperature of the platinum material channel 4, so as to control the liquid to flow into the muffle furnace 6 effectively after being homogenized by the stirring rod 5.

[0038] Among them, the discharge amount of raw materials needs to be controlled when the raw materials enter the working pool 2. The feeder (not shown in the figure) is used to uniformly add 1000 kg of raw materials per hour at a constant speed. The raw materials are heated by the kiln 1. During the heating process, the raw materials will volatilize, and the heating volatilization amount is set to 3% here; therefore, the discharge amount of the kiln 1 flowing to the working pool 2 needs to be calculated by subtracting 3% of the heating volatilization amount, so that the discharge amount of the kiln 1 flowing to the working pool 2 per hour is 1000×97%=970 kg, that is, the discharge amount of the kiln 1 flowing to the working pool 2 per hour is 970 kg.

[0039] The material liquid is distributed in the working pool 2. The specific distribution method is: the material channel 3 has the same size, the material liquid is affected by the temperature, and the flow rate of the material liquid is different at different temperatures. Take the same material channel 3, 900℃, flow rate of 300 kg, 950℃ flow rate of 350 kg as an example: the temperature of the working pool 2 and the material channel 3 can be controlled between 970-1020℃ to achieve this discharge amount.

[0040] Secondly, the liquid feed is transported to the platinum channel 4 through the channel 3, and the liquid feed in the platinum channel 4 is stirred by the stirring rod 5. At the same time, the stirring frequency of the stirring rod 5 is controlled by the controller 12. This method can effectively ensure the viscosity of the liquid feed, and the stirred liquid feed flows into the muffle furnace 6.

[0041] Then, the slurry flows into the muffle furnace 6 and is wrapped around the rotating tube 7. The rotating tube 7 is arranged on the rotating shaft 22 of the Danner machine 28. The rotating tube 7 is an inclined tube with a predetermined inclination angle, that is, the front end of the rotating tube 7 is inclined downward. The rotating tube 7 can rotate at a uniform speed, so that the slurry is wrapped around the rotating tube 7. While the slurry is wrapped around the rotating tube 7, the slurry can flow from the rear end of the rotation toward the front end of the rotating tube 7 along the extension direction of the rotating tube 7 due to gravity. The traction machine 8 is then used to pull the slurry toward the front end of the rotating tube 7, and further drives the slurry to flow toward the front end of the rotating tube 7. At the same time, the fan 13 is cooperated to blow air to the rotating tube 7. With the cooperation of the fan 13 and the traction machine 8, the slurry forms a glass tube prototype that is circular inside and outside.

[0042] The rear end of the rotating tube 7 is provided with an air volume sensing element 16 , which can sense the air volume and air pressure of the rotating tube 7 and adaptively adjust the fan 13 through the frequency converter 27 .

[0043] At this time, an insulation flame 9 is added at the rear end of the rotating tube 7 and the front end of the runway 14. The insulation flame 9 can ensure the temperature of the glass tube prototype at the rear end of the rotating tube 7 in real time, avoid solidification of the glass tube prototype, and effectively help to determine the shape of the glass tube.

[0044] In some embodiments, in step S4, the blowing volume of the fan 13 is controlled at 8-9.5 N / m 3 According to the size change of the rear end of the rotating tube 7 and the feedback of the air volume sensing element 16, the controller 12 makes adaptive adjustments to the speed of the fan 13 according to the set air volume range.

[0045] At 10N / m 3 The operating speed of the fixed kW air blowing fan 13 is 35-36 Hz, 8 N / m 3 In order to fix the operating speed of the kW blowing fan 13 at 29-30 Hz, 8N / m3, with this as a reference, the controller 12 will automatically adjust the output frequency of the inverter 27 after logical calculation, thereby controlling the speed of the fan 13 and achieving the purpose of stabilizing the air output.

[0046] In step S4, in order to prevent the external pressure and the speed of the traction machine 8 from affecting the change of the inner diameter during the traction process, a negative pressure vacuum pipe can be provided at the front end of the runway 14. The negative pressure vacuum pipe is a pipe that can maintain a constant vacuum and can assist in completing the shaping.

[0047] Of course, the runway 14 can also be a vacuum runway 14, and the glass temperature in the vacuum runway 14 is 300°C to 750°C.

[0048] In step S5 , a temperature sensor 17 is also included. The temperature sensor 17 is used to detect the temperature in the muffle furnace 6 .

[0049] Through real-time monitoring by the temperature sensor 17 in the observation room, the controller 12 outputs a control signal based on the rule that the natural gas flow rate increases by 0.05% for every 1°C increase in the fixed space here. The natural gas electronic proportional valve 29 is controlled by the servo motor to open or close the natural gas electronic proportional valve 29 according to the instructions given by the processor to control the flow rate, thereby controlling the size of the insulation flame 9 and the conditions required for reshaping the glass tube.

[0050] Finally, after reaching the shaping temperature, it enters the front end of the runway 14, and a hexagonal outer circle inner circle mold 10 is added to the front end of the runway 14, and the outer hexagonal inner circle mold 10 is used to shape the appearance of the glass tube prototype to form an outer hexagonal inner circle glass tube 15.

[0051] In order to achieve better shaping, the softening temperature (Tf) is related to the density and surface tension of the glass, and is therefore equivalent to a temperature between (3 and 15)×106 Pa·s, that is, a temperature between 318 and 1590 Pa·s.

[0052] In some embodiments, step S6 further includes using a dropper 18 to intermittently drop oil on the front end of the outer hexagonal inner circular mold 10 .

[0053] Among them, the titrator 18 is connected to the oil storage tank 26 through a pipeline, and the titrator 18 intermittently drips oil to the rear end of the rotating tube 7, thereby ensuring the lubricity of the rotating tube 7 and avoiding jamming between the rotating tube 7 and the rotating shaft of the Danner machine 28.

[0054] In this embodiment, the blowing pressure of the fan 13 is controlled between 0.02-0.045 Pa. The blowing pressure meets the operation requirements of the low-pressure fan 13.

[0055] The present disclosure also provides a processing mold for a neutral borosilicate glass tube with a hexagonal outer shape and a circular inner shape, which is applied to a processing method for a neutral borosilicate glass tube with a hexagonal outer shape and a circular inner shape; the processing mold for the neutral borosilicate glass tube with a hexagonal outer shape and a circular inner shape comprises a fixing part 19 and an eccentric rotating part 21, and a mounting hole 20 is provided in the fixing part 19; the eccentric rotating part 21 is arranged in the mounting hole 20, and six rotating shafts 22 are provided in the eccentric rotating part 21, and the six rotating shafts 22 are sequentially enclosed to form a hexagonal structure.

[0056] By setting a mounting hole 20 in the fixing member 19, a mounting position is provided for the eccentric rotating member 21. At the same time, six rotating shafts 22 are set inside the eccentric rotating member 21, and the rotating shafts 22 are adjacent to each other end to form a hexagonal structure; that is, in practice, the processing mold of the outer hexagonal inner circular neutral borosilicate glass tube is arranged on the outer wall of the glass tube prototype at intervals, and the processing molds of the three outer hexagonal inner circular neutral borosilicate glass tubes can be The zones are defined as the initial plastic zone, the medium pressure zone, and the finishing zone; the diameters of the processing molds of the hexagonal outer circular inner neutral borosilicate glass tubes located in the initial plastic zone, the medium pressure zone, and the finishing zone decrease successively, that is, the diameter of the processing mold of the hexagonal outer circular inner neutral borosilicate glass tubes in the initial plastic zone is larger than the diameter of the processing mold of the hexagonal outer circular inner neutral borosilicate glass tubes in the medium pressure zone, and the diameter of the processing mold of the hexagonal outer circular inner neutral borosilicate glass tubes in the medium pressure zone is larger than the diameter of the processing mold of the hexagonal outer circular inner neutral borosilicate glass tubes in the finishing zone.

[0057] Specifically, the glass tube prototype can be shaped using the processing mold of the neutral borosilicate glass tube with a hexagonal outer circle and a round inner circle in the initial plasticizing zone, and then semi-finishing shaping can be performed using the processing mold of the neutral borosilicate glass tube with a hexagonal outer circle and a round inner circle in the medium pressure zone. Finally, finishing can be performed using the processing mold of the neutral borosilicate glass tube with a hexagonal outer circle and a round inner circle in the finishing zone to obtain the plasticized neutral borosilicate glass tube with a hexagonal outer circle and a round inner circle.

[0058] Among them, the six rotating shafts 22 can rotate relative to the glass tube prototype, so as to ensure the precision of the plasticity of the glass tube prototype.

[0059] In this embodiment, the eccentric rotating member 21 is an eccentric rotating shaft; the rotating shaft 22 is an optical axis; after the eccentric rotating member 21 is subjected to pressure, it can rotate along with the glass tube prototype, that is, when the glass tube prototype is subjected to a large torque, a slight adjustment can be made so that the processing molds of the three outer hexagonal inner circular neutral borosilicate glass tubes are on the same axis, thereby ensuring the processing accuracy of the processing molds of the three outer hexagonal inner circular neutral borosilicate glass tubes.

[0060] In some embodiments, the fixing member 19 includes a first fixing block 23 and a second fixing block 24, and the first fixing block 23 and the second fixing block 24 are provided with an arc groove 25, and the two arc grooves 25 together form the mounting hole 20. The provision of the first fixing block 23 and the second fixing block 24 facilitates the installation of the arc eccentric rotating member 21.

[0061] The first fixing block 23 and the second fixing block 24 are provided with threaded holes 31 , and the first fixing block 23 and the second fixing block 24 are connected by bolts, so that the first fixing block 23 and the second fixing block 24 are connected to form a fixing member 19 .

[0062] The processing mold of the neutral borosilicate glass tube with a hexagonal outer surface and a circular inner surface also includes a mounting block 30, which is arranged on the inner wall of the eccentric rotating member 21 and is arranged at both ends of the rotating shaft 22 by the mounting blocks 30, that is, the rotating shaft 22 is fixed by the mounting blocks 30, thereby ensuring the installation of the rotating shaft 22.

[0063] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0064] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A method for processing a neutral borosilicate glass tube with a hexagonal outer shape and a round inner shape, characterized in that: The following steps are involved: S1, weighing each raw material and mixing them; S2, adding the mixed raw materials into the kiln (1), heating the raw materials to melt them, obtaining a liquid material, which enters the working pool (2) and then enters the material channel (3); S3, conveying the feed liquid to the platinum feed channel (4) through the feed channel (3), stirring the feed liquid with a stirring rod (5), and finally flowing into the muffle furnace (6); S4, the slurry flows into the muffle furnace (6) and is wrapped around the rotating tube (7) with a predetermined inclination angle. While the slurry is wrapped around the rotating tube (7), it is lowered by gravity. The traction machine (8) is used to pull the slurry forward. With the cooperation of the fan (13), the slurry forms a glass tube prototype with both the inside and outside being round during the pulling process. S5, adding a heat preservation flame (9) at the rear end of the rotating tube (7) and the front end of the runway (14); S6, after reaching the shaping temperature, entering the front end of the runway (14), adding an outer hexagonal inner circular mold (10) at the front end of the runway (14), shaping the appearance of the glass tube prototype, and forming an outer hexagonal inner circular glass tube (15); In step S4, the air volume of the fan (13) is controlled at 8-9.5 N / m 3 / between.

2. The processing method of the neutral borosilicate glass tube with outer hexagonal shape and inner round shape according to claim 1, characterized in that: The temperature of the working pool (2) and the material channel (3) is 970°C-1020°C.

3. The processing method of the neutral borosilicate glass tube with outer hexagonal shape and inner round shape according to claim 2, characterized in that: In step S2, a heater (11) is provided in the material channel (3), and the heater (11) is connected to a controller (12), and the controller (12) is used to control the opening and closing of the heater (11).

4. The method for processing a neutral borosilicate glass tube having an outer hexagonal shape and an inner round shape according to any one of claims 1 to 3, characterized in that: In step S4, a negative pressure vacuum pipe is provided at the front end of the runway (14).

5. The processing method of the neutral borosilicate glass tube with outer hexagonal shape and inner round shape according to claim 4, characterized in that: In step S4, a wind volume sensing element (16) is provided at the rear end of the rotating tube (7), and the wind volume sensing element (16) is used to detect the wind volume and wind pressure of the rotating tube (7).

6. The method for processing a neutral borosilicate glass tube with an outer hexagonal shape and an inner round shape according to claim 5, characterized in that: In step S5, a temperature sensor (17) is also included, and the temperature sensor (17) is used to detect the temperature inside the muffle furnace (6).

7. The processing method of the neutral borosilicate glass tube with outer hexagonal shape and inner round shape according to claim 6, characterized in that: In step S6, the process also includes using a dropper (18) to intermittently drip oil onto the front end of the outer hexagonal inner circular mold (10).

8. A processing mold for a neutral borosilicate glass tube with a hexagonal outer shape and a round inner shape, which is applied to the processing method of the neutral borosilicate glass tube with a hexagonal outer shape and a round inner shape according to any one of claims 1 to 7, characterized in that: include: A fixing member (19), wherein a mounting hole (20) is provided in the fixing member (19); An eccentric rotating member (21) is arranged in the mounting hole (20), and six rotating shafts (22) are arranged in the eccentric rotating member (21), and the six rotating shafts (22) are sequentially enclosed to form a hexagonal structure.

9. The processing mold for the outer hexagonal inner circular neutral borosilicate glass tube according to claim 8, characterized in that: The fixing member (19) comprises a first fixing block (23) and a second fixing block (24), wherein the first fixing block (23) and the second fixing block (24) are provided with arc-shaped grooves (25), and the two arc-shaped grooves (25) together form a mounting hole (20).

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