CN218951571U - Asphalt melt spinning die head - Google Patents
Asphalt melt spinning die head Download PDFInfo
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- CN218951571U CN218951571U CN202222998410.2U CN202222998410U CN218951571U CN 218951571 U CN218951571 U CN 218951571U CN 202222998410 U CN202222998410 U CN 202222998410U CN 218951571 U CN218951571 U CN 218951571U
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Abstract
The utility model provides an asphalt melt spinning die head, comprising: the shell comprises an inlet and an outlet, and a containing cavity which is communicated with the inlet and the outlet is arranged in the shell; the heating body is arranged in the accommodating cavity and is fixedly connected with the inner wall of the shell; the spinneret plate is arranged in the accommodating cavity, the circumference of the spinneret plate is connected with the heating body and covers the outlet, and a plurality of spinneret holes are formed in the spinneret plate in a penetrating manner; the heat preservation layer covers the outer wall of the shell. According to the utility model, the heating body is arranged in the circumferential direction of the spinneret plate for heating, and the heat insulation layer is covered on the shell to reduce heat loss, so that the temperature stability of the spinneret plate and each spinneret hole is improved, the spinning stability is improved, and the diameter of asphalt fibers and the fluctuation of the structure are reduced.
Description
Technical Field
The utility model relates to the technical field of asphalt carbon fiber manufacturing, in particular to an asphalt melt spinning die head.
Background
The production of the asphalt carbon fiber adopts high softening point asphalt with the softening point between 250 ℃ and 330 ℃, the asphalt fiber is spun by a melt spinning process at 300 ℃ to 380 ℃, and the asphalt fiber is prepared into the asphalt carbon fiber by non-melting, carbonization and graphitization. The pitch molecules are oriented in the fiber axial direction during melt spinning and become pitch fibers of tens of microns. The diameter of the pitch fiber is related to the viscosity of the pitch at the spinning temperature, the external draw, and the like. Commercial processes often employ porous spinning, i.e., a plurality of orifices per spinneret. The viscosity of the spinning pitch is highly sensitive to temperature, if the temperature of the spinneret plate or each spinneret orifice is unstable, the pitch spinning is unstable, the spun yarn diameters are obviously different, the spun pitch fiber tows are uneven, and even some spinneret orifices can generate sticky plates or trickles, and the spinning fails. Therefore, maintaining stable temperatures of the spinneret and the orifices has been a problem to be solved by melt spinning of asphalt.
Disclosure of Invention
In view of this, the present utility model provides an asphalt melt spinning die. Through setting up the heat-generating body at spinneret circumference and heating, cover the heat preservation simultaneously on the casing to reduce heat dissipation, maintain the temperature stability of spinneret and spinneret orifice.
The asphalt melt spinning die head provided by the utility model comprises: the shell comprises an inlet and an outlet, and a containing cavity which is communicated with the inlet and the outlet is arranged in the shell; the heating body is arranged in the accommodating cavity and is fixedly connected with the inner wall of the shell; the spinneret plate is arranged in the accommodating cavity, the circumference of the spinneret plate is connected with the heating body and covers the outlet, and a plurality of spinneret holes are formed in the spinneret plate in a penetrating manner; the heat preservation layer covers the outer wall of the shell.
Optionally, the pitch melt spinning die further comprises: the distribution plate is connected with one side surface of the spinneret plate, which faces the inlet, and is connected with the heating body in the circumferential direction, and a distribution hole communicated with the spinneret hole is formed in the distribution plate in a penetrating mode.
Optionally, the distribution plate is made of copper.
Optionally, the pitch melt spinning die further comprises: and the flow dividing piece is connected with one side surface of the distribution plate, which faces the inlet, and guides asphalt melt entering the accommodating cavity through the inlet to flow into the distribution hole.
Optionally, the shunt is made of copper.
Optionally, an end face of the flow dividing member facing the inlet is provided as an arc surface.
Optionally, the circumference of the shunt is provided as a cambered surface.
Optionally, the spinneret holes are arranged in multiple rings on the spinneret plate, and the distances between the spinneret holes and the spinneret plate edge on the same ring are equal.
Optionally, the casing includes drainage section, changeover portion and the spinning section that communicates in proper order, wherein: the drainage section is provided with the inlet; the spinning section is provided with the outlet; the cross-sectional area of the spinning section is larger than that of the drainage section; the spinneret plate is arranged in the spinneret section.
Optionally, the cross-sectional area of the dispensing orifice is greater than the cross-sectional area of the spinneret orifice.
Compared with the prior art, the technical scheme provided by the utility model has at least the following beneficial effects:
according to the asphalt melt spinning die head, the heating body is arranged in the circumferential direction of the spinneret plate for heating, and the heat insulation layer is covered on the shell to reduce heat dissipation, so that the temperature stability of the spinneret plate and each spinneret hole is improved, the stability of spinning is improved, and the diameter of asphalt fibers and the fluctuation of the structure are reduced.
Drawings
FIG. 1 is a cross-sectional view of an asphalt melt spinning die according to one embodiment of the utility model;
fig. 2 is a schematic illustration of a spinneret of the pitch melt-spinning die shown in fig. 1.
Reference numerals:
1: a housing; 11: a drainage section; 12: a transition section; 13: a spinning section; 2: a heating element; 3: a spinneret plate; 31: a spinneret orifice; 4: a receiving chamber; 5: a distribution plate; 51: a dispensing orifice; 6: a shunt.
Detailed Description
Embodiments of the present utility model will be further described below with reference to the accompanying drawings. In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description of the present utility model, and are not to indicate or imply that the apparatus or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
FIG. 1 is a cross-sectional view of an asphalt melt spinning die according to one embodiment of the utility model; fig. 2 is a schematic illustration of a spinneret of the pitch melt-spinning die shown in fig. 1.
As shown in fig. 1 and 2, the asphalt melt-spinning die head includes a housing 1, a heating body 2, a spinneret plate 3, and a heat-insulating layer (not shown).
The shell 1 comprises an inlet and an outlet, and a containing cavity 4 which is communicated with the inlet and the outlet is arranged in the shell 1; the heating body 2 is arranged in the accommodating cavity 4 and is fixedly connected with the inner wall of the shell 1; the spinneret plate 3 is arranged in the accommodating cavity 4, the circumference of the spinneret plate 3 is connected with the heating body 2 and covers the outlet, and a plurality of spinneret holes 31 are formed in the spinneret plate 3 in a penetrating manner; the heat preservation layer covers the outer wall of the shell 1.
When the heating body 2 is started during use, the heating body 2 generates heat and heats the spinneret plate 3 connected with the heating body 2, and meanwhile, the heat insulation layer covering the shell 1 plays a role in heat insulation, so that the heat in the accommodating cavity 4 is prevented from being rapidly dissipated. The asphalt melt enters the accommodating cavity 4 through the inlet of the shell 1, flows to the spinneret plate 3, enters into each spinneret hole 31 penetrating through the spinneret plate 3, and is sprayed out of the spinneret holes 31 to form asphalt fibers. Under the dual functions of heating by the heating body 2 and heat preservation by the heat preservation layer, the heat dissipation speed of the spinneret plate 3 and the spinneret holes 31 is reduced, and the temperature is stable.
According to the asphalt melt spinning die head, the heating body 2 is arranged in the circumferential direction of the spinneret plate 3 for heating, and the heat insulation layer is covered on the shell 1 to reduce heat dissipation, so that the temperature stability of the spinneret plate 3 and the spinneret holes 31 is improved, the spinning stability is improved, and the diameter of asphalt fibers and the fluctuation of the structure are reduced.
In this embodiment, as shown in fig. 1, the housing 1 is of a hollow structure and is made of a thermal insulation material, the inside is the accommodating cavity 4, the top end is the inlet, the bottom end is the outlet, and the cross-sectional area of the lower part is larger than that of the upper part. The heating element 2 is attached to and fixedly connected with the inner wall of the casing 1, in this embodiment, the heating element 2 is disposed on the inner walls of the upper portion and the lower portion of the casing 1 in an electric heating manner, that is, the asphalt melt enters the casing 1 and is sprayed out of a section of the inner wall of the casing 1. The spinneret plate 3 is arranged at the outlet of the bottom end in fig. 1, is perpendicular to the casing 1 at the position where the spinneret plate is located and completely covers the outlet, and is circumferentially attached to and fixedly connected with the heating body 2, so that the spinneret plate 3 is prevented from being far away from the heating body 2 and cannot achieve the effect of uniform heating, and the spinneret holes 31 are formed at the position where the spinneret plate 3 is close to the heating body 2. The heat-insulating layer completely covers the housing 1. According to practical application, the heating body 2 can adopt any heating mode, so long as the heating body can heat the spinneret plate 3, the heat insulation layer can adopt any commercially available heat insulation material, the shape and the size of the shell 1 can be adjusted, and correspondingly, the spinneret plate 3 is adjusted accordingly.
Optionally, the asphalt melt spinning die head further comprises a distribution plate 5, the distribution plate 5 is connected with the surface of one side of the spinneret plate 3 facing the inlet, and is connected with the heating body 2 in the circumferential direction, and a distribution hole 51 communicated with the spinneret hole 31 is formed in the distribution plate 5 in a penetrating manner. With this arrangement, the asphalt melt entering the accommodating chamber 4 enters the distributing hole 51 first, and then enters the spinneret hole 31 from the distributing hole 51, so that the spinneret is more uniform.
In this embodiment, as shown in fig. 1, the distribution plate 5 is fixed on the upper surface of the spinneret plate 3, and is also connected to the heating element 2 in the circumferential direction, and when the heating element 2 is operated, heat is transferred to the distribution plate 5, and the distribution plate 5 heats the asphalt melt flowing to the surface thereof. As shown in fig. 1, the thickness of the distribution plate 5 is greater than the thickness of the spinneret plate 3, but the cross-sectional specifications of the distribution plate and the spinneret plate are the same, the position of the distribution hole 51 on the distribution plate 5 is the same as the position of the spinneret hole 31 on the spinneret plate 3, the aperture of the distribution hole 51 is greater than the aperture of the spinneret hole 31, and the distribution hole 51 and the spinneret hole 31 at the corresponding position are arranged in a straight line in the vertical direction, so that the asphalt melt flowing into the distribution hole 51 continuously and stably flows into the spinneret hole 31, and stable spinneret is realized. The specific thickness of the distribution plate 5 can be adjusted according to practical application.
Alternatively, the distribution plate 5 is made of copper material. Copper has higher heat conductivity coefficient which is more than 390W/m.K, the distribution plate 5 is made of metallic copper, and the whole temperature of the distribution plate 5 is uniform under the heating action of the heating body 2, so that the asphalt melt flowing through each part of the distribution plate 5 cannot have excessive temperature difference, and the sprayed asphalt melt enters each corresponding spinneret orifice 31 through each distribution hole 51 penetrating through the distribution plate 5 and is sprayed out, and the sprayed asphalt fiber has higher stability.
Optionally, the pitch melt spinning die further comprises a diverter 6, the diverter 6 being connected to a side surface of the distribution plate 5 facing the inlet, the diverter 6 guiding the pitch melt entering the receiving cavity 4 through the inlet to flow into the distribution holes 51. In this arrangement, the flow splitter 6 has a flow guiding effect on the asphalt melt entering the accommodating cavity 4, so that the asphalt melt can quickly enter the distribution hole 51, heat dissipation of the asphalt melt is reduced, and spinning efficiency is improved.
In this embodiment, as shown in fig. 1, the distribution holes 51 are distributed in the circumferential direction of the distribution plate 5, the diverter 6 is connected to the middle part of the upper surface of the distribution plate 5, and is generally tapered, and gradually decreases in height in the direction toward the distribution hole 51, and extends to the vicinity of the distribution hole 51, so that the asphalt melt entering the accommodating cavity 4 through the inlet falls onto the diverter 6, flows onto the distribution plate 5 through the surface of the diverter 6, finally flows into the distribution hole 51, and further flows into the spinneret hole 31, thereby realizing spinning. According to practical application, the specific shape and size of the diverter 6 can be adjusted, as long as the diverter can drain the asphalt melt falling into the accommodating cavity 4 to the distribution hole 51, and the specific connection position of the diverter 6 on the distribution plate 5 is adjusted according to the position change of the distribution hole 51.
Optionally, the shunt member 6 is made of copper material. Under the heating action of the heating body 2, the distribution plate 5 simultaneously transmits heat to the distributing piece 6, the heat conductivity coefficient of copper is higher and is larger than 390W/m.K, the distributing piece 6 is made of metallic copper, so that the overall temperature of the distributing piece 6 is uniform, the asphalt melt flowing through the distributing piece 6 can not have excessive temperature difference, and the asphalt melt flows into the distribution holes 51, enters the corresponding spinneret orifices 31 and is sprayed out, and sprayed asphalt fibers have higher stability.
Optionally, an end surface of the flow dividing member 6 facing the inlet is provided as a cambered surface. This arrangement allows the asphalt melt entering the receiving chamber 4 to smoothly flow down the arc surface to smoothly enter the distribution hole 51 after falling down the flow dividing member 6.
The height of the flow dividing member 6 and the arc surface radian of the end face can be properly adjusted according to the sizes of the accommodating cavity 4 and the distribution plate 5.
Alternatively, the circumferential direction of the flow splitter 6 is provided as a cambered surface. This arrangement allows the asphalt melt entering the receiving chamber 4 to smoothly flow down the circumferential arc surface after falling to the flow dividing member 6, so as to smoothly enter the distribution hole 51.
In this embodiment, as shown in fig. 1, the end face and the circumferential direction of the flow dividing member 6 facing the inlet end are both arc surfaces, and the arc surfaces are smoothly transited, so that the asphalt melt smoothly flows down to the bottom end and enters the distribution hole 51.
Optionally, the spinneret holes 31 are arranged in multiple rings on the spinneret plate 3, and the distances between the spinneret holes 31 and the edge of the spinneret plate 3 on the same ring are equal. The spinneret plate 3 is circumferentially connected with the heating body 2, in the heat transfer process, heat is dissipated to a certain extent in the direction towards the center of the spinneret plate 3, and the arrangement ensures that the distance between each spinneret hole 31 on the same ring and the edge of the spinneret plate 3 is equal in the range that the heat dissipation of the spinneret plate 3 circumferentially meets the spinning condition, so that the temperature at each spinneret hole 31 is uniform as much as possible, and the spinning stability is ensured.
In this embodiment, as shown in fig. 2, the cross section of the spinneret plate 3 is circular, three circles of the spinneret holes 31 are formed in a penetrating manner within a range close to the edge of the spinneret plate 3, the three circles of the spinneret holes 31 and the spinneret plate 3 are concentrically arranged, and adjacent spinneret holes 31 on each circle are arranged at equal intervals. Correspondingly, the cross section of the distributing plate 5 is also circular, and three circles of distributing holes 51 are formed at positions corresponding to the spinneret holes 31. According to practical application, the specific number of turns of the spinneret holes 31 can be adjusted, the distance between the adjacent spinneret holes 31 on the same ring can be adjusted, and accordingly, the distribution holes 51 on the distribution plate 5 are adjusted accordingly.
Optionally, the shell 1 comprises a drainage section 11, a transition section 12 and a spinning section 13 which are sequentially communicated, wherein the drainage section 11 is provided with the inlet; the spinning section 13 is provided with the outlet; the cross-sectional area of the spinning section 13 is larger than the cross-sectional area of the drainage section 11; the spinneret plate 3 is arranged in the spinneret section 13. In this arrangement, the drainage section 11 with a smaller cross section is connected with the asphalt melt injection device, so that the asphalt melt is introduced into the accommodating cavity 4, and after entering the accommodating cavity 4, the space becomes large, which is beneficial to the rapid diversion and diffusion of the asphalt melt to the spinneret orifices 31, so as to perform spinning operation.
In this embodiment, as shown in fig. 1, the drainage section 11 and the spinning section 13 are hollow cylinders, the middle transition section 12 is provided as a hollow circular table, two ends of the hollow circular table are respectively connected with the drainage section 11 and the spinning section 13, the drainage section 11 and the spinning section 13 are coaxially arranged, the cross-sectional area of the spinning section 13 is larger than that of the drainage section 11, and the cross-sectional area of the transition section 12 is gradually increased in the direction towards the spinning section 13. The inner wall of the drainage section 11 and the inner wall of the spinning section 13 are respectively provided with the heating body 2, the distribution plate 5 and the spinneret plate 3 are respectively arranged in the spinning section 13, and the flow dividing piece 6 is arranged in the transition section 12. The specific shape and size of the drainage section 11, the transition section 12 and the spinning section 13 can be adjusted according to practical application.
Optionally, the cross-sectional area of the distribution holes 51 is greater than the cross-sectional area of the spinneret holes 31. This arrangement facilitates a continuous and steady flow of asphalt melt into the distribution holes 51 into the spinneret holes 31.
The use of the bitumen melt spinning die is further described below:
when the heat-generating body 2 is started during use, the heat-generating body 2 generates heat and heats the spinneret plate 3 and the distribution plate 5 which are connected with the heat-generating body, the distribution plate 5 simultaneously transmits heat to the flow dividing piece 6 which is connected with the distribution plate, and meanwhile, the heat-insulating layer covering the shell 1 plays a role in heat preservation, so that the heat in the accommodating cavity 4 is prevented from being rapidly dissipated. Asphalt melt enters the accommodating cavity 4 through the inlet of the shell 1, falls to the flow dividing piece 6, flows downwards to the distribution plate 5 through the flow dividing piece 6, enters the distribution holes 51 penetrating the distribution plate 5, flows into the spinneret holes 31 penetrating the spinneret plate 3 and communicated with the distribution holes 51, and is sprayed out through the spinneret holes 31 to form asphalt fibers. The temperature difference of the asphalt melt flowing into each of the spinneret holes 31 is reduced under the multiple actions of the heating body 2 heating, the heat preservation of the heat preservation layer, and the distribution plate 5 and the flow dividing member 6 of copper. The direction indicated by the arrow in fig. 1 is the flow direction of the bitumen melt in the receiving chamber 4.
According to the asphalt melt spinning die head, the heating body 2 is arranged in the circumferential direction of the spinneret plate 3 for heating, and the heat insulation layer is covered on the shell 1 to reduce heat dissipation, so that the temperature stability of the spinneret plate 3 and the spinneret holes 31 is improved, the spinning stability is improved, and the diameter of asphalt fibers and the fluctuation of the structure are reduced.
The following describes the effects of the present utility model with reference to fig. 1 and 2.
The spinneret plate 3 in fig. 2 is penetrated with three circles of the spinneret holes 31, and the circumferential edge of the spinneret plate 3 faces the direction of the circle center, which are sequentially called an outer ring, a middle ring and an inner ring.
Example 1
The distributing plate 5 and the flow dividing member 6 in this embodiment are made of stainless steel. The specific process is as follows: with a softening point 310.0 ℃ of the spinning pitch, after melting at 343.0 ℃ the pitch enters the holding chamber 4 in fig. 1 under the delivery of a metering pump, the pitch melt enters the distribution holes 51 in the distribution plate 5 in the direction of the arrow in fig. 1 and then flows out through the spinneret holes 7. In FIG. 2, the temperatures of the orifices 31 on the inner ring, the middle ring and the outer ring were 336.1℃and 337.7 ℃and 339.0℃respectively, the temperature difference between the orifices on the inner and outer rings was 2.9℃and the temperature difference between the melt temperature and the orifices at the outer ring was 4.0 ℃.
Example 2
The distributing plate 5 and the distributing member 6 in this embodiment are made of copper. The specific process is as follows: with a softening point 310.0 ℃ of the spinning pitch, after melting at 343.0 ℃ the pitch enters the holding chamber 4 in fig. 1 under the delivery of a metering pump, the pitch melt enters the distribution holes 51 in the distribution plate 5 in the direction of the arrow in fig. 1 and then flows out through the spinneret holes 7. In FIG. 2, the temperatures of the orifices 31 on the inner ring, the middle ring and the outer ring are 338.5 ℃, 339.4 ℃ and 340.2 ℃, respectively, the temperature difference of the orifices on the inner ring and the outer ring is 1.7 ℃, and the temperature difference of the melt and the orifices at the outer ring is 2.8 ℃.
Example 3
The distributing plate 5 and the distributing member 6 in this embodiment are made of copper. The specific process is as follows: the spinning pitch with softening point of 301.0 ℃ is melted at 333.0 ℃ and then enters the accommodating cavity 4 in fig. 1 under the conveying of a metering pump, and the pitch melt enters the distributing holes 51 on the distributing plate 5 along the arrow direction in fig. 1 and then flows out through the spinneret holes 7. In FIG. 2, the temperatures of the orifices 31 in the inner, middle and outer rings were 328.9 ℃, 329.7 ℃ and 330.4 ℃, respectively, the temperature difference between the orifices in the inner and outer rings was 1.5 ℃, and the temperature difference between the melt and the orifices in the outer ring was 2.6 ℃.
Example 4
The distributing plate 5 and the distributing member 6 in this embodiment are made of copper. The specific process is as follows: with a spinning pitch having a softening point of 287 ℃, after melting at 317.0 ℃, it enters the receiving chamber 4 in fig. 1 under the transport of a metering pump, and the pitch melt enters the distribution holes 51 in the distribution plate 5 in the direction of the arrow in fig. 1 and then flows out through the spinning holes 7. In FIG. 2, the temperatures of the orifices 31 in the inner, middle and outer rings were 313.3 ℃, 314.0 ℃ and 314.6 ℃, respectively, the temperature difference between the orifices in the inner and outer rings was 1.3 ℃, and the temperature difference between the melt and the orifices in the outer ring was 2.4 ℃.
Therefore, with the asphalt melt spinning die head provided by the utility model, the temperature difference between the spinneret holes 31 at different positions on the spinneret plate 3 is smaller, and after the distribution plate 5 and the flow dividing piece 6 are made of copper, the temperature difference between the spinneret holes 31 at different positions is further reduced, and the uniformity and stability of asphalt spinning are facilitated due to the large sensitivity of viscosity to temperature after the asphalt melt is melted.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (10)
1. An asphalt melt spinning die, comprising:
the shell comprises an inlet and an outlet, and a containing cavity which is communicated with the inlet and the outlet is arranged in the shell;
the heating body is arranged in the accommodating cavity and is fixedly connected with the inner wall of the shell;
the spinneret plate is arranged in the accommodating cavity, the circumference of the spinneret plate is connected with the heating body and covers the outlet, and a plurality of spinneret holes are formed in the spinneret plate in a penetrating manner;
the heat preservation layer covers the outer wall of the shell.
2. The pitch melt spinning die of claim 1, further comprising:
the distribution plate is connected with one side surface of the spinneret plate, which faces the inlet, and is connected with the heating body in the circumferential direction, and a distribution hole communicated with the spinneret hole is formed in the distribution plate in a penetrating mode.
3. The pitch melt spinning die of claim 2, wherein:
the distributing plate is made of copper materials.
4. The pitch melt spinning die of claim 2 or 3, further comprising:
and the flow dividing piece is connected with one side surface of the distribution plate, which faces the inlet, and guides asphalt melt entering the accommodating cavity through the inlet to flow into the distribution hole.
5. The pitch melt spinning die of claim 4, wherein:
the shunt piece is made of copper materials.
6. The pitch melt spinning die of claim 4, wherein:
the end face of one end of the flow dividing piece, which faces the inlet, is provided with an arc face.
7. The pitch melt spinning die of claim 4, wherein:
the circumference of the flow dividing piece is set to be an arc surface.
8. A pitch melt spinning die according to any one of claims 1-3, characterized in that:
the spinneret holes are arranged in multiple rings on the spinneret plate, and the distances between the spinneret holes and the edge of the spinneret plate on the same ring are equal.
9. The asphalt melt spinning die according to any one of claims 1 to 3, wherein said housing comprises a flow guiding section, a transition section and a spinning section in sequential communication, wherein:
the drainage section is provided with the inlet;
the spinning section is provided with the outlet;
the cross-sectional area of the spinning section is larger than that of the drainage section;
the spinneret plate is arranged in the spinneret section.
10. A pitch melt spinning die according to claim 2 or 3, characterized in that:
the cross-sectional area of the dispensing orifice is greater than the cross-sectional area of the spinneret orifice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222998410.2U CN218951571U (en) | 2022-11-10 | 2022-11-10 | Asphalt melt spinning die head |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222998410.2U CN218951571U (en) | 2022-11-10 | 2022-11-10 | Asphalt melt spinning die head |
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| Publication Number | Publication Date |
|---|---|
| CN218951571U true CN218951571U (en) | 2023-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222998410.2U Active CN218951571U (en) | 2022-11-10 | 2022-11-10 | Asphalt melt spinning die head |
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| Country | Link |
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| CN (1) | CN218951571U (en) |
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2022
- 2022-11-10 CN CN202222998410.2U patent/CN218951571U/en active Active
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