阅读说明：本技术 一种熔融静电纺丝加热储料装置 (Melting electrostatic spinning heating storage device ) 是由 王晗 史磊 李申 薛增喜 于 2019-10-30 设计创作，主要内容包括：本发明涉及纳米纤维制作领域,具体为一种熔融静电纺丝加热储料装置,包括储料筒和顶针,所述储料筒的外壁套设有环形加热器,所述储料筒的上端设有顶盖,所述顶盖上设有第一中心孔,所述储料筒的下端固定连接有喷嘴,所述喷嘴上设有出料口,所述储料筒的原料腔内设有分流梭,所述分流梭上设有第二中心孔,所述顶针依次穿过所述第一中心孔和所述第二中心孔后穿设在所述出料口内。本发明的加热储料装置通过设置分流梭、进气通道和顶针结构,可以使原材料加热更均匀,防止原材料氧化,以及在加热过程中无原材料逸出,并可以方便的解决喷嘴堵塞的问题。(The invention relates to the field of nanofiber manufacturing, in particular to a melting electrostatic spinning heating storage device which comprises a storage barrel and a thimble, wherein an annular heater is sleeved on the outer wall of the storage barrel, a top cover is arranged at the upper end of the storage barrel, a first central hole is formed in the top cover, a nozzle is fixedly connected to the lower end of the storage barrel, a discharge hole is formed in the nozzle, a shunting shuttle is arranged in a raw material cavity of the storage barrel, a second central hole is formed in the shunting shuttle, and the thimble penetrates through the first central hole and the second central hole in sequence and then is arranged in the discharge hole in a penetrating mode. According to the heating storage device, the shunting shuttle, the air inlet channel and the thimble structure are arranged, so that raw materials can be heated more uniformly, the raw materials are prevented from being oxidized, no raw materials escape in the heating process, and the problem of nozzle blockage can be solved conveniently.)

1. The utility model provides a melting electrostatic spinning heating storage device, its characterized in that, includes the storage section of thick bamboo, the outer wall cover of storage section of thick bamboo is equipped with annular heater, the lower extreme fixedly connected with nozzle of storage section of thick bamboo, be equipped with the discharge gate on the nozzle, be fixed with the reposition of redundant personnel shuttle on the raw materials intracavity wall of storage section of thick bamboo, the reposition of redundant personnel shuttle with be equipped with the feedstock channel between the storage section of thick bamboo, the feedstock channel with the raw materials chamber intercommunication.

2. The melting electrostatic spinning heating storage device as claimed in claim 1, further comprising a thimble, wherein a top cover is arranged at the upper end of the storage barrel, a first central hole is formed in the top cover, a second central hole is formed in the shunt shuttle, and the thimble penetrates through the first central hole and the second central hole in sequence and then is arranged in the discharge hole in a penetrating manner.

3. The melt electrostatic spinning heating storage device as claimed in claim 2, wherein the annular heater comprises a first heating ring and a second heating ring, the first heating ring is sleeved on the upper portion of the storage barrel, and the second heating ring is sleeved on the lower portion of the storage barrel.

4. The melt electrostatic spinning heating storage device as claimed in claim 3, further comprising an air inlet channel, wherein the air inlet channel is located between the first heating ring and the second heating ring and is communicated with the storage barrel.

5. The molten electrostatic spinning heating storage device as claimed in claim 3, wherein the diverter and the second heating ring are both located at the same height of the storage barrel.

6. The melt electrostatic spinning heating storage device according to claim 1, wherein the shunt shuttle comprises a contact portion and a non-contact portion, the non-contact portion is located below the contact portion, the contact portion comprises a first curved surface and a second curved surface, the first curved surface is tightly attached to the inner wall of the storage barrel, a gap is formed between the second curved surface and the inner wall of the storage barrel, the non-contact portion is conical, and a gap is formed between the conical outer surface and the inner wall of the storage barrel.

7. The molten electrostatic spinning heating and storing device as claimed in claim 2, wherein the diameter of the second central hole is larger than that of the ejector pin, the diameter of the lower end of the ejector pin is smaller than that of the discharge port of the nozzle, and the ejector pin can move up and down in the discharge port.

8. The melt electrostatic spinning heating storage device as claimed in claim 1, wherein a receiving plate is arranged below the nozzle, and a high-voltage electric field is arranged between the nozzle and the receiving plate.

9. The melt electrostatic spinning heating and storing device as claimed in claim 4, wherein a plurality of air holes are uniformly distributed in the top cover, the inlet of the air inlet channel is located at a position close to the second heating ring, and inert gas enters the raw material cavity through the air inlet channel.

10. The melting electrostatic spinning heating and storing device as claimed in claim 2, wherein a threaded connection portion is arranged at the upper end of the ejector pin, and the ejector pin is fixed on the top cover through a nut.

Technical Field

The invention relates to the field of nanofiber manufacturing, in particular to a melting electrostatic spinning heating storage device.

Background

With the development of society, people have more and more demand for nano fibers, whether industrial products or living goods. Since the nanofiber has a relatively small filament diameter, it is easily formed and used in various fields such as heat insulation, sound absorption, catalysts, catalyst carriers, and the like. Since 1930 the classic spinning technology was invented, various polymer nanofibers have been successfully developed and their properties have been extensively studied. With the development of society, the society has more and more great demand for nano fibers, and the traditional electrostatic spinning technology can not meet the demand of people for nano fibers due to the production of raw materials. Therefore, in this social background, melt electrospinning has been invented. Compared with the traditional electrostatic spinning, the limitation of the melt electrostatic spinning on the raw materials for spinning is further reduced, and for high polymer materials which are not easy to dissolve in an organic solvent, the nano-fiber can be prepared by using the centrifugal electrostatic spinning technology.

Under current condition, some schemes can carry out the production of spinning, for example directly heat the storage bucket, directly place thermistor in the outer lane of storage bucket and detect the temperature. The scheme can produce the spinning in the actual production process, but the scheme is difficult to further accurately control the process for producing the electrostatic spinning and realize accurate temperature index detection. The prior art of melt electrospinning has certain drawbacks, which lead to problems such as cost and efficiency of spinning. For example, since the raw material is insufficiently heated and the temperature gradient is inevitably lowered in the case of heat conduction, the heating degree of the raw material at different positions is different from both the heating temperature and the holding time at a specific temperature. This affects the quality of the nanofiber filaments to some extent and there is a transverse temperature gradient inside the raw material storage barrel, so that the temperature of the raw material ejected from the needle port cannot be precisely controlled.

In addition, the traditional heating storage device is not blocked below, when in the heating process, the molten raw materials can flow out through a needle opening under the action of gravity to cause certain pollution, and the viscosity of the raw materials is high, so that heat loss is easily caused at the needle head to block the needle head. With conventional devices, the clogged needle can only be unclogged by removing it, which is extremely troublesome.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a heating and storing device for melt electrostatic spinning, which can heat raw materials more uniformly, prevent the raw materials from being oxidized, prevent the raw materials from escaping in the heating process and conveniently solve the problem of nozzle blockage by arranging a shunt shuttle, an air inlet channel and an ejector pin structure.

The invention aims to provide a melting electrostatic spinning heating storage device which comprises a storage barrel, wherein an annular heater is sleeved on the outer wall of the storage barrel, the lower end of the storage barrel is fixedly connected with a nozzle, a discharge hole is formed in the nozzle, a shunting shuttle is fixed on the inner wall of a raw material cavity of the storage barrel, a raw material channel is arranged between the shunting shuttle and the storage barrel, and the raw material channel is communicated with the raw material cavity.

Further, still include the thimble, the upper end of storage section of thick bamboo is equipped with the top cap, is equipped with first centre bore on the top cap, is equipped with the second centre bore on the reposition of redundant personnel shuttle, and the thimble wears to establish in the discharge gate after passing first centre bore and second centre bore in proper order.

Further, the annular heater comprises a first heating ring and a second heating ring, the first heating ring is sleeved on the upper portion of the material storage barrel, and the second heating ring is sleeved on the lower portion of the material storage barrel.

Further, still include inlet channel, inlet channel is located between first heating ring and the second heating ring, and communicates with the storage silo.

Furthermore, the shunt shuttle and the second heating ring are both positioned at the same height of the material storage barrel.

Further, the reposition of redundant personnel shuttle includes contact site and non-contact portion, and the non-contact portion is located the below of contact site, and the contact site includes first curved surface and second curved surface, first curved surface with the storage vat inner wall is closely laminated, and the second curved surface is gapped with the inner wall of storage vat, and non-contact portion is the toper, and the conical surface is gapped with the inner wall of storage vat.

Furthermore, the diameter of the second center hole is larger than that of the ejector pin, the diameter of the lower end of the ejector pin is smaller than that of the discharge hole of the nozzle, and the ejector pin can move up and down in the discharge hole.

Furthermore, a receiving plate is arranged below the nozzle, and a high-voltage electric field is arranged between the nozzle and the receiving plate.

Furthermore, a plurality of air holes are uniformly distributed in the top cover, the inlet of the air inlet channel is located at a position close to the second heating ring, inert gas enters the raw material cavity through the air inlet channel, and oxygen in the raw material cavity is discharged through the air holes.

Furthermore, the upper end of the ejector pin is provided with a threaded connecting part, and the ejector pin is fixed on the top cover through a nut.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the melting electrostatic spinning heating storage device, the shunt shuttle structure is added in the raw material cavity of the storage barrel, and the shunt shuttle is made of materials with good heat conduction performance, so that the temperatures on the shunt shuttle are the same, the cross section area of a melting raw material channel is reduced at the shunt shuttle, the removing area is enlarged, and the accurate temperature of the melting raw material passing through the shunt shuttle can be ensured through the heat transfer between the shunt shuttle and the raw material.

2. The melting electrostatic spinning heating storage device is provided with the air inlet channel, a large amount of inert gas is introduced into the air inlet channel, the gas in the raw material cavity can escape through the air holes in the top cover, a certain high pressure can be formed in the raw material cavity due to different flow rates of the gas to enter and exit, the initial test extrusion power of the molten raw material is provided, in addition, the oxygen in the cavity can be discharged due to the introduction of a large amount of gas, and the raw material is prevented from reacting with the oxygen in the cavity after being heated to a certain temperature, so that the raw material is prevented from deteriorating.

3. The gas channel of the melting electrostatic spinning heating storage device is ventilated at the lower part and escapes from the upper part, when the raw materials are melted into liquid, the ventilated gas can form bubbles, the bubbles float upwards to stir the liquid in the cavity, so that the relative positions of the liquids at different positions are changed, the stirring effect can be achieved, and the raw materials are prevented from being heated unevenly.

4. According to the melting electrostatic spinning heating and storing device, the special ejector pin structure is added, the ejector pin can be moved downwards before heating, the discharge hole of the nozzle is blocked, and the pollution to the working environment caused by the fact that raw materials escape in advance is prevented; in the production process, production can be interrupted by using the ejector pins; in addition, because the nozzle is easy to be blocked due to solidification of raw materials caused by heat dissipation, the blocked nozzle can be conveniently dredged by using the thimble structure, and the continuous production is convenient.

5. According to the melting electrostatic spinning heating storage device, the high-voltage electric field is added between the nozzle and the receiving plate, the melt sprayed out from the nozzle is charged, and the charged melt is acted by the electric field force in the electric field, so that the spinning quality is better.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a heating storage device according to the invention;

FIG. 2 is a schematic structural view of the heating storage device of the invention, which is seen from the A-A section downwards;

the material storage device comprises a material storage barrel 1, a thimble 2, an air inlet channel 3, a first heating ring 4, a second heating ring 5, a nozzle 6, a shunt shuttle 7, a second center hole 71, a contact part 72, a first curved surface 721, a second curved surface 722, a non-contact part 73, a top cover 8, an air hole 81, a first center hole 82 and a nut 9.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 2, the invention provides a melting electrostatic spinning heating storage device, which comprises a storage barrel 1 and a thimble 2, wherein an annular heater is sleeved on the outer wall of the storage barrel 1 and used for continuously heating raw materials in the storage barrel 1, a top cover 8 is arranged at the upper end of the storage barrel 1, a first central hole 82 is formed in the top cover 8, a nozzle 6 is fixedly connected to the lower end of the storage barrel 1, a discharge hole is formed in the nozzle 6, a shunt shuttle 7 is fixedly arranged on the inner wall of a raw material cavity of the storage barrel 1, a second central hole 71 is formed in the shunt shuttle 7, and the thimble 2 sequentially penetrates through the first central hole 82 and the second central hole 71 and then is arranged in the discharge hole. Specifically, the diameter of the second center hole 71 is slightly larger than that of the thimble 2, and the second center hole 71 is provided only for passing the thimble 2, and after the thimble 2 is inserted, the remaining gap of the second center hole 71 becomes small, and since the viscosity of the molten material is large, the small gap is difficult to pass the raw material.

Specifically, the purpose of providing the shunt shuttle 7 in the present invention is to increase heat conduction, and the material of the shunt shuttle 7 may be selected to be the same as that of the material storage cylinder 1, and of course, may be selected to be different from that of the material storage cylinder 1, as long as the heat conduction performance can be increased, and all of them belong to the protection scope of the present invention. Preferably, the shunt shuttle 7 of the present invention is made of metal, because the metal has small heat conduction loss, so that the shunt shuttle 7 can sufficiently transfer heat to the melt. Specifically, the shunt shuttle 7 comprises a contact part 72 and a non-contact part 73, the non-contact part 73 is located below the contact part 72, the contact part 72 comprises a first curved surface 721 and a second curved surface 722, the first curved surface 721 is closely attached to the inner wall of the storage barrel 1, preferably, the first curved surface 721 can be fixed to the inner wall of the storage barrel 1 by welding, a gap is formed between the second curved surface 722 and the inner wall of the storage barrel 1, the non-contact part 73 is conical, and a gap is formed between the conical outer surface and the inner wall of the storage barrel 1; according to the invention, the first curved surface 721 is fixedly connected with the inner wall of the storage barrel 1, so that the heat of the outer wall of the storage barrel 1 can be transferred to the shunt shuttle 7, the diameter of the second curved surface 722 is smaller than that of the first curved surface 721, so that a certain gap exists between the second curved surface 722 and the outer wall of the storage barrel 1, the gap size of the gap can ensure that raw materials can pass through, and in the passing process, because the gap is smaller and the outer walls of the shunt shuttle 7 and the storage barrel 1 are heated, a better heating effect can be provided, so that the plasticizing performance of a melt is better.

Specifically, there are two first curved surfaces 721 and two second curved surfaces 722, the diameter of the first curved surface 721 is the same as the diameter of the inner wall of the storage barrel 1, the diameter of the second curved surface 722 is smaller than the diameter of the inner wall of the storage barrel 1, and the first curved surface 721 and the second curved surface 722 are symmetrically arranged, so that the raw material can flow out through two symmetrical channels. Because the non-contact part 73 is arranged at the lower end of the contact part 72, and the outer surface of the non-contact part 73 and the inner wall of the storage barrel 1 are both provided with gaps, the raw material can be continuously contacted with the outer surface of the shunting shuttle 7 after flowing out through the two channels, and the conical structure of the non-contact part 73 is positioned at the central position of the storage barrel 1, so that the non-contact part 73 can heat the melt flowing out from the channel of the shunting shuttle 7 again or play a role in heat preservation, so that the temperature of the raw material positioned at the central position of the storage barrel 1 is consistent with that of the raw material positioned at the edge position, and the heating. Of course, other structures of the shunt shuttle can be selected in other embodiments of the present invention, and the fixation form of the shunt shuttle and the material storage cylinder can be fixed by welding or other fixation methods, all of which belong to the protection scope of the present invention.

Specifically, the annular heater comprises a first heating ring 4 and a second heating ring 5, the first heating ring 4 is sleeved on the upper part of the material storage barrel 1, and the second heating ring 5 is sleeved on the lower part of the material storage barrel 1; according to the invention, the heating rings are sleeved on the upper part and the lower part of the storage barrel 1, so that the outer wall of the storage barrel 1 is heated more uniformly, and the temperature of raw materials in the storage barrel 1 is ensured to be more uniform. Specifically, the shunt shuttle 7 and the second heating ring 5 are both positioned at the same height of the storage cylinder 1, so that heat generated by the second heating ring 5 can be rapidly transferred to the shunt shuttle 7 through the outer wall of the storage cylinder 1, the cross-sectional area of a molten raw material channel is reduced at the shunt shuttle 7, the removal area is enlarged, and the molten raw material passing through the cross-sectional area can be ensured to be at an exact temperature through heat transfer between metal and the molten raw material, so that the accuracy of the temperature of a melt sprayed from a nozzle is ensured.

Specifically, the device further comprises an air inlet channel 3, wherein the air inlet channel 3 is positioned between the first heating ring 4 and the second heating ring 5 and is communicated with the material storage barrel 1; a plurality of air holes 81 are uniformly distributed on the top cover 8 of the storage cylinder, a large amount of inert gas is introduced into the raw material cavity through the air inlet channel 3 in the heating process, the gas can escape through the air holes 81 on the top cover, a certain high pressure is formed in the raw material cavity because the gas flows in and out, the continuous high pressure can provide initial extrusion power for the molten raw material, in addition, oxygen in the raw material cavity can be discharged due to the introduction of a large amount of inert gas, and therefore the raw material is prevented from reacting with the oxygen in the raw material cavity after being heated to a certain temperature, and the raw material is prevented from deteriorating. Preferably, the inlet of the inlet channel 3 is located close to the second heating ring 5; this gas passage 3 ventilates in the lower part of storage cylinder 1, escapes through bleeder vent 81 on the storage cylinder top cap, and after the raw materials carries out the melting and becomes liquid, the gas that lets in will form the bubble, and the come-up of bubble just can mix the liquid in the raw materials intracavity, makes the relative position of the liquid of different positions change, so alright reach the effect of stirring, prevents that the heating of raw materials is inhomogeneous.

Specifically, the diameter of the lower end of the thimble 2 is slightly smaller than that of the discharge hole of the nozzle. In a popular way, the structure of the thimble 2 is a processed metal thin rod, the lower end of the thimble is specially processed, so that the diameter of the thimble 2 is slightly smaller than that of a discharge port of the nozzle, the thimble 2 can be directly inserted into the discharge port of the nozzle 6, and the discharge port of the nozzle can be directly dredged after a melt is solidified and blocked; in addition, the thimble 2 can be used as a switch of the nozzle 6, when necessary, the thimble 2 is used for blocking the nozzle to prevent the melt from flowing downwards to cause environmental pollution, the other embodiment of the invention is that the nozzle 6 is connected with the material storage cylinder 1 through a bolt, and the connection mode inevitably has great temperature difference in the heat conduction process, so that the raw material is easy to solidify and block the nozzle due to heat dissipation at the nozzle, and at the moment, the blocked nozzle can be conveniently dredged by using the thimble structure, thereby facilitating the continuous production.

Specifically, a receiving plate (not shown) is arranged below the nozzle 6, and a high-voltage electric field is arranged between the nozzle and the receiving plate. According to the invention, the electric field is added at the nozzle and the receiving plate, so that a high-voltage electric field is generated between the nozzle 6 and the receiving plate, the melt sprayed out from the nozzle 6 is charged, the charged melt is more easily filamentized under the action of the electric field force in the electric field, and the spinning quality is better.

Specifically, the upper end of thimble 2 is equipped with threaded connection portion, and on thimble 2 was fixed in top cap 8 through nut 9, at the in-process of production melt spinning, accessible nut 9 and 2 precession, the length that the back-out adjusted thimble 2 and got into storage cylinder 1, when the nozzle blockked up, can unscrew the nut, directly dredges the nozzle that blocks up with the thimble, convenient in time production.

The working principle of the invention is as follows:

firstly, opening a top cover 8 of a storage barrel 1, loading solid raw materials into the storage barrel 1, and closing the top cover 8; then the thimble 2 is lowered to the bottom end, and the discharge hole of the nozzle 6 is blocked; then electrifying to heat the raw materials until the raw materials are melted; continuously introducing inert gas in the heating process until the production is finished; after the heating is finished, the thimble 2 is lifted, and the nozzle 6 is opened, so that the spinning fiber can be produced. Meanwhile, in order to ensure the spinning quality, an electric field is added at the nozzle 6 to generate enough traction force and produce spinning with better quality.

The present invention has been further described with reference to specific embodiments, but it should be understood that the detailed description should not be construed as limiting the spirit and scope of the present invention, and various modifications made to the above-described embodiments by those of ordinary skill in the art after reading this specification are within the scope of the present invention.