Atomizing core and manufacturing method thereof

Abstract

The invention discloses an atomizing core and a manufacturing method thereof.The manufacturing method of the atomizing core comprises the steps that a first porous ceramic body and a second porous ceramic body are formed in a sintering mode through a high-temperature sintering process with the sintering temperature being 700 DEG C or above, and the first porous ceramic body and the second porous ceramic body are used for being spliced into a tubular porous ceramic liquid guiding body; respectively printing a first metal heating film on the inner wall surface of the first porous ceramic body and printing a second metal heating film on the inner wall surface of the second porous ceramic body by adopting a thick film printing process; and splicing the first porous ceramic body printed with the first metal heating film and the second porous ceramic body printed with the second metal heating film into a whole. By means of the method, the tubular ceramic atomizing core which is high in structural strength, good in atomizing performance and capable of facilitating mechanical production can be obtained, and the metal heating body is arranged on the inner surface of the porous ceramic liquid guiding body.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic atomization, and in particular to an atomization core and a manufacturing method thereof. Background Art

[0002] Electronic cigarettes and electronic devices used to atomize health care drugs, therapeutic drugs and other substances can be collectively referred to as electronic atomization devices. The atomization core, as an important component of the electronic atomization device, has always been the focus of research by technical personnel in this field.

[0003] The ceramic atomization core is a common type of atomization core in the field of electronic cigarettes. The ceramic atomization cores on the market are mainly composed of a porous ceramic liquid-conducting body and a metal heating element connected to the porous ceramic liquid-conducting body. According to the different structural forms of the metal heating element, the ceramic atomization core can be divided into two types, one is a ceramic atomization core in which the structural form of the metal heating element is a heating wire, and the other is a ceramic atomization core in which the structural form of the metal heating element is a heating film. Compared with the former, the main advantage of the latter is that the contact area between the heating film and the surface of the porous ceramic liquid-conducting body is larger, so that the thermal efficiency is higher, and more aerosols can be generated per unit time for users to inhale, which is beneficial to improving the user's smoking taste; and according to the different positions of the metal heating element in the porous ceramic liquid-conducting body, the ceramic atomization core can be divided into two types, one is a ceramic atomization core in which the metal heating element is set There are two types of electronic atomization cores: one is a ceramic atomization core (whose shape may be block, sheet or tubular) placed on the outer surface of a porous ceramic liquid-conducting body; the other is a ceramic atomization core (whose shape is generally tubular) in which a metal heating element is arranged on the inner surface of a porous ceramic liquid-conducting body. Compared with the former, the latter has the main advantage that, since the porous ceramic liquid-conducting body has a hollow tubular structure and has an atomization channel for easy passage of gas, it is conducive to simplifying the internal airway design of the electronic atomization device (for example, the internal airway of the electronic atomization device and the atomization channel inside the porous ceramic liquid-conducting body can be arranged coaxially along the same straight line, without the need to additionally arrange auxiliary airways on both sides of the ceramic atomization core in order to guide out the aerosol generated by the ceramic atomization core as in the former type of ceramic atomization core), and is conducive to better exerting the atomization performance of the ceramic atomization core, providing users with a better smoking taste.

[0004] In the related art, in order to manufacture a tubular ceramic atomizing core in which a metal heating element is arranged on the inner surface of a porous ceramic liquid-conducting body, there are mainly three manufacturing methods:

[0005] The first manufacturing method is to first process a tubular porous ceramic liquid-conducting body, and then insert a ring-shaped metal heating element (such as a spiral heating wire) into the internal channel of the porous ceramic liquid-conducting body, so that the metal heating element is in close contact with the inner wall of the porous ceramic liquid-conducting body, or the metal heating film is attached to the inner wall of the porous ceramic liquid-conducting body; however, the disadvantage of this manufacturing method is that, in the process of inserting the ring-shaped metal heating element into the internal channel of the porous ceramic liquid-conducting body, it is easy to cause the inner wall of the porous ceramic liquid-conducting body to wear and reduce the liquid-conducting performance of the porous ceramic liquid-conducting body, thereby reducing the atomization performance of the entire ceramic atomization core, and attaching the metal heating film to the inner wall of the porous ceramic liquid-conducting body will cause the metal heating film to easily detach from the inner wall of the porous ceramic liquid-conducting body, thereby reducing the service life of the entire ceramic atomization core.

[0006] The second manufacturing method is to pre-embed a metal heating element (such as a spiral heating wire or a heating mesh) in a molding mold filled with a powdered ceramic slurry, and then press the powdered ceramic slurry and the metal heating element together through hot die casting (the temperature of hot die casting is generally 200-350°C), and then place the ceramic blank containing the metal heating element in a sintering furnace for sintering together, wherein the sintering method can be high-temperature sintering (specifically sintering at a high temperature of more than 700°C) or low-temperature sintering (specifically sintering at a low temperature of less than 700°C); however, the disadvantage of this manufacturing method is that if the ceramic blank containing the metal heating element is sintered into a tubular ceramic atomization core by a high-temperature sintering method, due to the currently commonly used metal heating The metal body is prone to severe oxidation in a high temperature environment exceeding 700°C, which will lead to unstable heating performance of the metal heating element, and further lead to unstable atomization performance of the entire ceramic atomization core; if the ceramic blank containing the metal heating element is sintered into a tubular ceramic atomization core by low-temperature sintering, although the severe oxidation of the metal heating element can be avoided, the ceramic slurry in the ceramic blank usually needs to be completely formed in a high temperature environment above 700°C, so the structural strength of the porous ceramic liquid guide obtained will be insufficient and ceramic powder will easily fall off, which will reduce the atomization performance of the ceramic atomization core and affect the user's smoking taste; in addition, the specific processes involved in this manufacturing method are also relatively complicated, and it is difficult to carry out mechanized production, so the production cost is also relatively high.

[0007] The third manufacturing method is to first use a casting process to produce a sheet-like ceramic green body, then cut the ceramic green body into ceramic substrates of the required size, and then use a thick film printing process to print a metal heating film on the surface of the ceramic substrate, and then wrap the ceramic substrate printed with the metal heating film around a cylindrical mold stick and curl it into a tubular ceramic atomization core blank with the metal heating film located on the inside, and finally place the tubular ceramic atomization core blank in a sintering furnace for high-temperature sintering (sintering temperature is higher than 700°C) to obtain a tubular ceramic atomization core finished product; the advantage of this manufacturing method is that, compared with the first manufacturing method, due to the use of thick film printing technology, the metal heating film can be firmly attached to the inner wall of the porous ceramic liquid-conducting body and the inner wall of the porous ceramic liquid-conducting body will not be worn, and it can also facilitate mechanized production and reduce production costs; compared with the above-mentioned second manufacturing method, the manufacturing process is simplified, and due to the use of thick film printing technology, it can facilitate mechanized production and thus reduce production costs. However, the disadvantage of this manufacturing method is that since the ceramic atomizer core blank must ultimately undergo a high-temperature sintering step to obtain a finished ceramic atomizer core with high structural strength, it is still impossible to avoid severe oxidation of the metal heating film, resulting in unstable heating performance of the metal heating film.

[0008] Therefore, how to obtain a tubular ceramic atomization core with high structural strength, good atomization performance, easy mechanized production and a metal heating element arranged on the inner surface of a porous ceramic liquid conductor is a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0009] The main purpose of the present invention is to provide a method for manufacturing an atomizer core, aiming to manufacture a tubular ceramic atomizer core with high structural strength, good atomization performance, easy mechanized production and a metal heating element arranged on the inner surface of a porous ceramic liquid-conducting body.

[0010] To achieve the above object, the present invention provides a method for manufacturing an atomizer core, the method comprising the following steps:

[0011] A first porous ceramic body and a second porous ceramic body are sintered and formed respectively by a high-temperature sintering process with a sintering temperature of 700° C. or higher, wherein the first porous ceramic body and the second porous ceramic body are used to form a porous ceramic liquid-conducting body, the porous ceramic liquid-conducting body is in a hollow tubular shape to form an atomization channel, the first porous ceramic body has a first inner wall surface for forming the atomization channel, and the second porous ceramic body has a second inner wall surface for forming the atomization channel;

[0012] A first metal heating film is printed on the first inner wall surface and a second metal heating film is printed on the second inner wall surface by using a thick film printing process;

[0013] The first porous ceramic body printed with the first metal heating film and the second porous ceramic body printed with the second metal heating film are spliced ​​together to obtain a finished atomizer core with a metal heating film that has not undergone high-temperature oxidation printed on its inner wall.

[0014] In some embodiments, the step of sintering the first porous ceramic body using a high temperature sintering process with a sintering temperature of 700° C. or higher comprises:

[0015] Providing a first metal pin and a second metal pin, and positioning the first metal pin and the second metal pin in a first mold at intervals;

[0016] Injecting a first porous ceramic slurry into the first mold, and after the first porous ceramic slurry is cooled and formed, a first porous ceramic body pre-embedded with the first metal wire foot and the second metal wire foot is obtained, wherein the first end of the first metal wire foot is exposed on the first inner wall surface, and the second end is passed through an end surface of the first porous ceramic body, and the first end of the second metal wire foot is exposed on the first inner wall surface, and the second end is passed through the end surface of the first porous ceramic body;

[0017] In a vacuum environment or a protective atmosphere environment, the first porous ceramic body pre-embedded with the first metal wire foot and the second metal wire foot is sintered at a temperature of 700°C to 1100°C to obtain the first porous ceramic body with the first metal wire foot and the second metal wire foot, wherein the protective atmosphere environment is an atmosphere environment filled with inert gas.

[0018] In some embodiments, the step of sintering the second porous ceramic body using a high temperature sintering process with a sintering temperature of 700° C. or higher comprises:

[0019] Providing a third metal pin and a fourth metal pin, and positioning the third metal pin and the fourth metal pin in a second mold at intervals;

[0020] Injecting a second porous ceramic slurry into the second mold, and after the second porous ceramic slurry is cooled and formed, a second porous ceramic body pre-embedded with the third metal wire foot and the fourth metal wire foot is obtained, wherein the first end of the third metal wire foot is exposed on the second inner wall surface, and the second end is passed through an end surface of the second porous ceramic body, and the first end of the fourth metal wire foot is exposed on the second inner wall surface, and the second end is passed through the end surface of the second porous ceramic body;

[0021] In a vacuum environment or a protective atmosphere environment, the second porous ceramic body pre-embedded with the third metal wire pin and the fourth metal wire pin is sintered at a temperature of 700 to 1000°C to obtain the second porous ceramic body with the third metal wire pin and the fourth metal wire pin, wherein the protective atmosphere environment is an atmosphere environment filled with inert gas.

[0022] In some embodiments, the step of printing the first metal heating film on the first inner wall surface using a thick film printing process includes:

[0023] Taking the first end of the first metal wire foot as the starting point and the first end of the second metal wire foot as the ending point, thick film printing is performed on the first inner wall surface according to a predetermined tortuous printing path to obtain the first porous ceramic body printed with the first metal heating film.

[0024] In some embodiments, the step of printing the second metal heating film on the second inner wall surface using a thick film printing process includes:

[0025] Taking the first end of the third metal wire foot as the starting point and the first end of the fourth metal wire foot as the ending point, thick film printing is performed on the second inner wall surface according to a predetermined tortuous printing path to obtain the second porous ceramic body printed with the second metal heating film.

[0026] In some embodiments, after the step of printing the first metal heating film on the first inner wall surface by using a thick film printing process, the method further includes:

[0027] A first metal pin and a second metal pin are provided, and one end of the first metal pin is welded to the first end of the first metal heating film, and one end of the second metal pin is welded to the second end of the first metal heating film.

[0028] In some embodiments, after the step of printing the second metal heating film on the second inner wall surface by using a thick film printing process, the method further includes:

[0029] A third metal pin and a fourth metal pin are provided, and one end of the third metal pin is welded to the first end of the second metal heating film, and one end of the fourth metal pin is welded to the second end of the second metal heating film.

[0030] In some embodiments, the first metal pin, the second metal pin, the third metal pin and the fourth metal pin are all made of copper or nickel, and the surfaces of the first metal pin, the second metal pin, the third metal pin and the fourth metal pin are all covered with an anti-oxidation layer made of gold or silver, and the thickness of the anti-oxidation layer is 10 to 30 microns.

[0031] In some embodiments, the first porous ceramic body further comprises a first joint surface and a second joint surface located on both sides of the first inner wall surface along the circumference of the first porous ceramic body, and the second porous ceramic body further comprises a third joint surface and a fourth joint surface located on both sides of the second inner wall surface along the circumference of the second porous ceramic body, the first joint surface is provided with a first clamping portion, the second joint surface is provided with a second clamping portion, the third joint surface is provided with a third clamping portion matched with the first clamping portion, and the fourth joint surface is provided with a fourth clamping portion matched with the second clamping portion, wherein the first clamping portion is a groove or a protrusion, and the second clamping portion is a groove or a protrusion;

[0032] The step of splicing the first porous ceramic body printed with the first metal heating film and the second porous ceramic body printed with the second metal heating film into one body comprises:

[0033] The first porous ceramic body printed with the first metal heating film and the second porous ceramic body printed with the second metal heating film are spliced ​​in such a way that the first splicing surface is opposite to the third splicing surface and the second splicing surface is opposite to the fourth splicing surface, so that the first clamping part is engaged with the third clamping part and the second clamping part is engaged with the fourth clamping part, thereby obtaining the finished atomizer core.

[0034] In some embodiments, the step of splicing the first porous ceramic body printed with the first metal heating film and the second porous ceramic body printed with the second metal heating film into one body comprises:

[0035] A shell is provided, wherein the shell is in a hollow tubular shape and a first liquid inlet hole and a second liquid inlet hole are provided on a side wall of the shell.

[0036] The first porous ceramic body printed with the first metal heating film and the second porous ceramic body printed with the second metal heating film are assembled to form the porous ceramic liquid conductor;

[0037] The porous ceramic liquid conductor is clamped and installed in the shell to fix the first porous ceramic body and the second porous ceramic body, and the outer wall of the first porous ceramic body covers the first liquid inlet hole and the outer wall of the second porous ceramic body covers the second liquid inlet hole, thereby obtaining the finished atomizer core.

[0038] In some embodiments, the first porous ceramic body further comprises a first joint surface and a second joint surface located on both sides of the first inner wall surface along the circumference of the first porous ceramic body, and the second porous ceramic body further comprises a third joint surface and a fourth joint surface located on both sides of the second inner wall surface along the circumference of the second porous ceramic body;

[0039] The step of splicing the first porous ceramic body printed with the first metal heating film and the second porous ceramic body printed with the second metal heating film into one body comprises:

[0040] Applying a first ceramic glaze having a curing temperature lower than 600° C. on the first joint surface and / or the third joint surface, and applying a second ceramic glaze having a curing temperature lower than 600° C. on the second joint surface and / or the fourth joint surface;

[0041] The first porous ceramic body printed with the first metal heating film and the second porous ceramic body printed with the second metal heating film are spliced ​​in such a manner that the first splicing surface is opposite to the third splicing surface and the second splicing surface is opposite to the fourth splicing surface, so as to form the porous ceramic liquid conductor;

[0042] Positioning the porous ceramic liquid conductor in a third mold;

[0043] The third mold filled with the porous ceramic liquid conductor is placed in a sintering furnace with a working temperature lower than 600° C., so that the first ceramic glaze and the second ceramic glaze are sintered and solidified to bond the first porous ceramic body and the second porous ceramic body into one, thereby obtaining the finished atomizer core.

[0044] In some embodiments, the shape and size of the first porous ceramic body are the same as the shape and size of the second porous ceramic body.

[0045] In some embodiments, the porous ceramic liquid conductor is a cylindrical structure with a hollow interior.

[0046] To achieve the above object, the present invention further provides an atomizer core, which is manufactured by the atomizer core manufacturing method in any of the above embodiments.

[0047] Compared with the prior art, the present invention has the following beneficial effects:

[0048] In the technical solution of the present invention, firstly, since the first porous ceramic body and the second porous ceramic body are both sintered by a high-temperature sintering process with a sintering temperature of more than 700°C, the first porous ceramic body and the second porous ceramic body both have high structural strength, thereby making it possible to effectively guarantee the structural strength of the tubular porous ceramic liquid-conducting body subsequently formed by splicing the first porous ceramic body and the second porous ceramic body; secondly, since the inner wall surfaces of the first porous ceramic body and the second porous ceramic body are exposed before the first porous ceramic body and the second porous ceramic body are spliced ​​into the tubular porous ceramic liquid-conducting body, a thick film printing process can be used to print a metal heating film on the inner wall surfaces of the first porous ceramic body and the second porous ceramic body, and then subsequently, the first porous ceramic body and the second porous ceramic body only need to be spliced ​​into one body to obtain the metal heating film arranged on the inner surface of the porous ceramic liquid-conducting body. The surface of the tubular ceramic atomization core not only effectively guarantees the liquid-conducting performance of the porous ceramic liquid-conducting body and the connection reliability between the porous ceramic liquid-conducting body and the metal heating film, but also reduces the manufacturing difficulty of making the metal heating film on the inner surface of the tubular porous ceramic liquid-conducting body and facilitates mechanized production, which is beneficial to reducing the production cost of the tubular ceramic atomization core; furthermore, in the process of splicing the first porous ceramic body and the second porous ceramic body with the metal heating film printed on the inner wall surface into the tubular ceramic atomization core finished product, the metal heating film will not be severely oxidized by the high temperature environment above 700°C, thereby ensuring the heating stability of the metal heating film; since the liquid-conducting performance of the porous ceramic liquid-conducting body and the heating performance of the metal heating film can be effectively guaranteed, the atomization performance of the finally obtained ceramic atomization core finished product can be guaranteed.

[0049] It can be seen that the manufacturing method of the atomizer core provided by the present invention can obtain a tubular ceramic atomizer core with high structural strength, good atomization performance, easy mechanized production and a metal heating film arranged on the inner surface of a porous ceramic liquid-conducting body. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the embodiments of the present invention 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 invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0051] Figure 1 It is a flowchart of a method for manufacturing an atomizer core in one embodiment of the present invention;

[0052] Figure 2 This is a schematic diagram of the three-dimensional structure of a finished product of a tubular ceramic atomizer core in one embodiment of the present invention;

[0053] Figure 3 A schematic diagram of the three-dimensional structure of a first (or second) porous ceramic body with a metal wire foot and a metal heating film in one embodiment of the present invention;

[0054] Figure 4 for Figure 3 Schematic diagram of structural decomposition;

[0055] Figure 5 It is a schematic diagram of the physical manufacturing process of the manufacturing method of the atomizer core in one embodiment of the present invention;

[0056] Figure 6 It is a schematic diagram of the physical manufacturing process of splicing a first porous ceramic body printed with a first metal heating film and a second porous ceramic body printed with a second metal heating film into a tubular ceramic atomization core finished product by mechanical connection in one embodiment of the present invention;

[0057] Figure 7 This is a schematic diagram of the physical manufacturing process of using a low-temperature sintering process in one embodiment of the present invention to splice a first porous ceramic body printed with a first metal heating film and a second porous ceramic body printed with a second metal heating film into a tubular ceramic atomization core finished product.

[0058] Description of Figure Numbers:

[0059] 1-porous ceramic liquid guide, 10-atomization channel, 11-first porous ceramic body, 111-first inner wall surface, 112-first splicing surface, 113-second splicing surface, 114-first clamping portion, 115-second clamping portion, 12-second porous ceramic body, 121-second inner wall surface, 122-third splicing surface, 123-fourth splicing surface, 124-third clamping portion, 125-fourth clamping portion;

[0060] 21-first metal heating film, 22-second metal heating film;

[0061] 31 - first metal pin, 32 - second metal pin, 33 - third metal pin, 34 - fourth metal pin;

[0062] 41 - shell, 41 - first liquid inlet hole, 42 - second liquid inlet hole.

[0063] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0064] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0065] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0066] In addition, when an element is said to be "fixed to" another element, it can be directly on the other element, or one or more intervening elements can exist between them. When an element is said to be "connected to" another element, it can be directly connected to the other element, or one or more intervening elements can exist between them.

[0067] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or", "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0068] Please refer to Figure 1 , Figure 2 and Figure 5 The present invention provides a method for manufacturing an atomizer core, the method comprising the following steps:

[0069] S10, a first porous ceramic body 11 and a second porous ceramic body 12 are sintered and formed respectively by a high-temperature sintering process with a sintering temperature of more than 700°C, wherein the first porous ceramic body 11 and the second porous ceramic body 12 are used to be assembled into a porous ceramic liquid-conducting body 1, and the porous ceramic liquid-conducting body 1 is in a hollow tubular shape to form an atomization channel 10, and the first porous ceramic body 11 has a first inner wall surface 111 for constituting the atomization channel 10, and the second porous ceramic body 12 has a second inner wall surface 121 for constituting the atomization channel 10.

[0070] In this step S10, in some specific embodiments, the specific process of sintering and forming the first porous ceramic body 11 by a high-temperature sintering process with a sintering temperature of more than 700°C can be as follows: a porous ceramic slurry with a certain temperature is injected into a mold for forming the first porous ceramic body 11, and after the porous ceramic slurry in the mold is cooled and formed, a blank of the first porous ceramic body 11 can be obtained. For the convenience of description, the blank is called the first porous ceramic blank. At this time, the first porous ceramic blank has not been sintered, and its structural strength and liquid conduction performance cannot meet the use requirements, so it still needs to be sintered. Specifically, after obtaining the first porous ceramic embryo, the first porous ceramic embryo is placed in a sintering furnace for high-temperature sintering, and the temperature of the high-temperature sintering is above 700°C, for example, it can be 700°C, 800°C, 1000°C, 1100°C, 1300°C, 1600°C, 2000°C, etc. The sintering time can be determined according to the actual situation, for example, it can be 10 minutes, 30 minutes, 45 minutes, 1 hour, 2 hours, etc., as long as it can ensure that the first porous ceramic embryo is completely sintered into a first porous ceramic body 11 with the required structural strength and liquid-conducting performance, this embodiment does not impose specific restrictions on this. Since the first porous ceramic embryo is sintered in a high-temperature environment above 700°C, the ceramic slurry in the first porous ceramic embryo can be completely formed into porcelain, so that the structural strength and liquid-conducting performance of the first porous ceramic body 11 can be effectively guaranteed, that is, the first porous ceramic body 11 obtained by high-temperature sintering has a strong structural strength and good liquid-conducting performance. It should be noted here that the specific components of the porous ceramic slurry are well known to those skilled in the art and will not be described in detail here.

[0071] In this step S10, it should be noted that the specific process of sintering the second porous ceramic body 12 using a high-temperature sintering process with a sintering temperature of more than 700°C is similar to the specific process of sintering the first porous ceramic body 11 using a high-temperature sintering process with a sintering temperature of more than 700°C, and will not be repeated here. It should also be noted here that in the specific implementation, the shape and size of the first porous ceramic body 11 and the shape and size of the second porous ceramic body 12 can be the same or different. As long as the first porous ceramic body 11 and the second porous ceramic body 12 are assembled to form a tubular porous ceramic liquid conductor 1 and to ensure that the metal heating film can be printed on the inner wall of the first porous ceramic body 11 and the inner wall of the second porous ceramic body 12 using a thick film printing process, this embodiment does not impose specific restrictions on this. In addition, the shape of the porous ceramic liquid-conducting body 1 obtained by splicing the first porous ceramic body 11 and the second porous ceramic body 12 can be a circular tube with a hollow interior (in this case, the cross-section of the porous ceramic liquid-conducting body 1 is a circular ring), or a square tube with a hollow interior (in this case, the cross-section of the porous ceramic liquid-conducting body 1 can be in the shape of a "U"), or a conical tube with a hollow interior (in this case, the shape of the porous ceramic liquid-conducting body 1 can be a cone, a pyramid, etc.), and so on, which can be determined according to actual use requirements, and this embodiment does not impose any specific restrictions on this.

[0072] S20 , using a thick film printing process to print the first metal heating film 21 on the first inner wall surface 111 of the first porous ceramic body 11 , and to print the second metal heating film 22 on the second inner wall surface 121 of the second porous ceramic body 12 .

[0073] In this step S20, specifically, thick film printing equipment can be used to print the first metal heating film 21 on the first inner wall surface 111 of the first porous ceramic body 11 and the second metal heating film 22 on the second inner wall surface 121 of the second porous ceramic body 12.

[0074] S30, splicing the first porous ceramic body 11 printed with the first metal heating film 21 and the second porous ceramic body 12 printed with the second metal heating film 22 into one body, to obtain a finished atomizer core with the inner wall surface printed with a metal heating film that has not undergone high-temperature oxidation.

[0075] In the technical solution of the embodiment of the present invention, based on the above steps S10 to S30, firstly, since the first porous ceramic body 11 and the second porous ceramic body 12 are both sintered by a high-temperature sintering process with a sintering temperature of more than 700°C, the first porous ceramic body 11 and the second porous ceramic body 12 both have high structural strength, thereby making it possible to effectively ensure the structural strength of the tubular porous ceramic liquid conductor 1 subsequently formed by splicing the first porous ceramic body 11 and the second porous ceramic body 12; secondly, since the first porous ceramic body 11 and the second porous ceramic body 12 are spliced ​​into the tubular porous ceramic liquid conductor Before the liquid 1 is passed through the first porous ceramic body 11 and the second porous ceramic body 12, the inner wall surfaces are exposed, so the metal heating film can be printed on the inner wall surfaces of the first porous ceramic body 11 and the second porous ceramic body 12 by thick film printing. The inner wall surfaces of the first porous ceramic body 11 and the second porous ceramic body 12 are exposed, so the metal heating film can be printed on the inner wall surfaces of the first porous ceramic body 11 and the second porous ceramic body 12 by thick film printing (it can be understood here that since the thick film printing equipment cannot extend into the interior of the tubular porous ceramic liquid conductor 1, the thick film printing process is used to print the metal heating film. Due to certain technical limitations, the metal heating film can only be printed on the outer surface of the porous ceramic liquid-conducting liquid 1, but not on the inner surface of the porous ceramic liquid-conducting liquid 1), and then the first porous ceramic body 11 and the second porous ceramic body 12 only need to be spliced ​​into one body to obtain a tubular ceramic atomization core with the metal heating film arranged on the inner surface of the porous ceramic liquid-conducting liquid 1. In this way, not only the liquid-conducting performance of the porous ceramic liquid-conducting liquid 1 and the connection reliability between the porous ceramic liquid-conducting liquid 1 and the metal heating film can be effectively guaranteed, but also the manufacturing process of the metal heating film on the inner surface of the tubular porous ceramic liquid-conducting liquid 1 is reduced. The manufacturing difficulty is reduced and mechanized production is convenient, which is conducive to reducing the production cost of the tubular ceramic atomization core; furthermore, in the process of splicing the first porous ceramic body 11 and the second porous ceramic body 12 with the metal heating film printed on the inner wall surface into a tubular ceramic atomization core finished product, the metal heating film will not be subjected to the high temperature environment above 700°C and will not be seriously oxidized, thereby ensuring the heating stability of the metal heating film; since the liquid conducting performance of the porous ceramic liquid conductor 1 and the heating performance of the metal heating film can be effectively guaranteed, the atomization performance of the finally obtained ceramic atomization core finished product can be guaranteed.

[0076] It can be seen that the manufacturing method of the atomizer core provided in the embodiment of the present invention can obtain a tubular ceramic atomizer core with high structural strength, good atomization performance, easy mechanized production and a metal heating film arranged on the inner surface of the porous ceramic liquid conductor 1.

[0077] Furthermore, in order to finally obtain a finished tubular ceramic atomizer core with electrode pins, so that when the finished tubular ceramic atomizer core is subsequently used in an electronic atomization device, it is convenient to electrically connect the metal heating film in the finished tubular ceramic atomizer core with the power control system in the electronic atomization device, in some embodiments of the present invention, after the steps of printing the first metal heating film 21 on the first inner wall surface 111 of the first porous ceramic body 11 and printing the second metal heating film 22 on the second inner wall surface 121 of the second porous ceramic body 12 by a thick film printing process, a step of welding the electrode pins is also included, and the step of welding the electrode pins specifically includes:

[0078] S201, providing a first metal pin 31, a second metal pin 32, a third metal pin 33 and a fourth metal pin 34;

[0079] S202, weld one end of the first metal wire pin 31 to the first end of the first metal heating film 21, weld one end of the second metal wire pin 32 to the second end of the first metal heating film 21, weld one end of the third metal wire pin 33 to the first end of the second metal heating film 22, and weld one end of the fourth metal wire pin 34 to the second end of the second metal heating film 22.

[0080] In this embodiment, in the specific implementation, the specific material of each metal pin can be determined according to actual needs, for example, it can be gold, silver, copper, aluminum, nickel, etc., as long as it can meet the use requirements, this embodiment does not impose specific restrictions on this. In some embodiments, considering that copper and nickel both have low cost and good electrical conductivity and oxidation resistance, in the specific implementation, the first metal pin 31, the second metal pin 32, the third metal pin 33 and the fourth metal pin 34 can all be preferably copper or nickel. In addition, in order to reduce the risk of severe oxidation due to high temperature when each metal pin is welded with the corresponding metal heating film, thereby reducing the risk of reducing the electrical conductivity of the metal pin, preferably, the surface of the first metal pin 31, the second metal pin 32, the third metal pin 33 and the fourth metal pin 34 are all coated with an anti-oxidation layer made of gold or silver, and the thickness of the anti-oxidation layer is 10 to 30 microns.

[0081] In this embodiment, based on the above steps S201 to S202, a first porous ceramic body 11 with two electrode pins and a metal heating film and a second porous ceramic body 12 with two electrode pins and a metal heating film can be obtained. After the first porous ceramic body 11 and the second porous ceramic body 12 are subsequently spliced ​​into one, a tubular ceramic atomization core with four electrode pins and two metal heating films can be obtained. The advantage of a tubular ceramic atomization core with such a structure is that, in some use scenarios where the tubular ceramic atomization core is applied to an electronic atomization device, it is convenient to connect the two metal heating films in series or in parallel, which is conducive to improving the flexibility of the use of the tubular ceramic atomization core.

[0082] Specifically, an electronic atomization device generally includes an atomizer for generating aerosol and a battery assembly for providing electrical energy to the atomizer, wherein the core component of the atomizer is an atomizer core that can generate aerosol by heating and atomization, and the core component of the battery assembly is a power control system. When the atomizer and the battery assembly are assembled into an electronic atomization device for use, the atomizer core is electrically connected to the power control system, and the power control system can be used to control the atomizer core to be energized for atomization or to be powered off to stop atomization.

[0083] When the tubular ceramic atomizing core with four electrode pins and two metal heating films is installed in an atomizer for use and the two metal heating films need to be connected in series, three electrode contacts can be set on the atomizer, and the three electrode contacts are respectively a first positive electrode contact, a common contact and a first negative electrode contact. At the same time, two electrode contacts electrically connected to the power control system are set on the battery assembly, and the two electrode contacts are respectively a second positive electrode contact and a second negative electrode contact, wherein the first metal pin 31 is connected to the first positive electrode contact, the third metal pin 33 is connected to the first negative electrode contact, the second metal pin 32 and the fourth metal pin 34 are both connected to the common contact. When the atomizer equipped with the tubular ceramic atomizing core is connected to the battery pack When the components are assembled into an electronic atomization device for use, the first positive contact of the atomizer is electrically contacted with the second positive contact of the battery assembly, and the first negative contact of the atomizer is electrically contacted with the second negative contact of the battery assembly, thereby realizing the series connection between the first metal heating film 21 and the second metal heating film 22, so that the first metal heating film 21 and the second metal heating film 22 can be powered on and heated at the same time, and vaporize the atomized liquid adsorbed on the inner wall surface of the porous ceramic liquid conductive body 1 into an aerosol that can be inhaled by the user. Since the first metal heating film 21 and the second metal heating film 22 can be powered on and heated at the same time, the tubular ceramic atomization core can generate a large amount of aerosol for the user to inhale, which can meet the inhalation needs of users who like "big smoke".

[0084] When the tubular ceramic atomizing core with four electrode pins and two metal heating films is installed in the atomizer for use and the two metal heating films need to be connected in parallel, three electrode contacts can be set on the atomizer, and the three electrode contacts are respectively a first negative electrode contact, a first positive electrode contact, and a second negative electrode contact. At the same time, three electrode contacts electrically connected to the power control system are set on the battery assembly, and the three electrode contacts on the battery assembly are respectively a third negative electrode contact, a second positive electrode contact, and a fourth negative electrode contact, wherein the first metal pin 31 is connected to the first negative electrode contact, the third metal pin 33 is connected to the second negative electrode contact, and the second metal pin 32 and the fourth metal pin 34 are both connected to the first positive electrode contact. When the atomizer equipped with the tubular ceramic atomizing core and the battery assembly are assembled into an electronic atomizing device for use, the first negative electrode contact of the atomizer is electrically contacted with the third negative electrode contact of the battery assembly, the second negative electrode contact of the atomizer is electrically contacted with the fourth negative electrode contact of the battery assembly, and the atomizer The first positive electrode contact of the insulator is electrically contacted with the second positive electrode contact of the battery assembly, thereby realizing the parallel connection between the first metal heating film 21 and the second metal heating film 22, so that the first metal heating film 21 and the second metal heating film 22 can be powered on and heated at the same time, or they can be powered on and heated separately, so as to meet the inhalation needs of users who like "big smoke" and users who like "small smoke". For example, when the user needs to inhale a large amount of aerosol, the power control system can be used to control the first metal heating film 21 and the second metal heating film 22 to be powered on and heated at the same time (at this time, all the electrode contacts on the battery assembly are in a powered state); for another example, when the user needs to inhale a small amount of aerosol, the power control system can be used to control one of the first metal heating film 21 and the second metal heating film 22 to be powered on and heated (at this time, the second positive electrode contact on the battery assembly is in a powered state, and only one of the third negative electrode contact and the fourth negative electrode contact is in a powered state).

[0085] Furthermore, in order to finally obtain a finished tubular ceramic atomizer core with electrode pins, so that when the finished tubular ceramic atomizer core is subsequently used in an electronic atomizer device, it is convenient to electrically connect the first metal heating film 21 in the finished tubular ceramic atomizer core with the power supply control system in the electronic atomizer device. In other embodiments of the present invention, the step of sintering the first porous ceramic body 11 using a high-temperature sintering process with a sintering temperature of more than 700° C. includes:

[0086] S10A, providing a first metal pin 31 and a second metal pin 32, and positioning the first metal pin 31 and the second metal pin 32 in a first mold at intervals.

[0087] In this step S10A, during the specific implementation, the specific material of the first metal wire foot 31 and the second metal wire foot 32 can be determined according to actual needs, for example, it can be gold, silver, copper, aluminum, nickel, etc., as long as it can meet the use requirements, and this embodiment does not impose specific restrictions on this. In some embodiments, considering that copper and nickel both have low cost and good electrical conductivity and oxidation resistance, during the specific implementation, the first metal wire foot 31 and the second metal wire foot 32 can be preferably copper or nickel. In addition, in order to reduce the risk of the first metal wire foot 31 and the second metal wire foot 32 being severely oxidized and reducing the conductivity of the two metal wire feet when the first porous ceramic blank pre-embedded with the first metal wire foot 31 and the second metal wire foot 32 is subsequently sintered at high temperature, preferably, the surfaces of the first metal wire foot 31 and the second metal wire foot 32 are coated with an anti-oxidation layer made of gold or silver, and the thickness of the anti-oxidation layer is 10 to 30 microns.

[0088] S10B, inject the first porous ceramic slurry into the first mold, and after the first porous ceramic slurry is cooled and formed, a first porous ceramic body pre-embedded with a first metal wire foot 31 and a second metal wire foot 32 is obtained, wherein the first end of the first metal wire foot 31 is exposed on the first inner wall surface 111, and the second end passes through an end surface of the first porous ceramic body, and the first end of the second metal wire foot 32 is exposed on the first inner wall surface 111, and the second end passes through an end surface of the first porous ceramic body.

[0089] S10C, in a vacuum environment or a protective atmosphere environment, the first porous ceramic blank pre-embedded with the first metal wire foot 31 and the second metal wire foot 32 is sintered at a temperature of 700°C to 1100°C to obtain a first porous ceramic body 11 with the first metal wire foot 31 and the second metal wire foot 32, wherein the protective atmosphere environment refers to an atmosphere environment filled with inert gas.

[0090] In this step S10C, by placing the first porous ceramic body pre-embedded with the first metal wire foot 31 and the second metal wire foot 32 under a temperature condition of 700℃~1100℃ for sintering, not only can it be ensured that the ceramic slurry in the first porous ceramic body can be completely ceramicized, so that the structural strength and liquid conductivity of the first porous ceramic body 11 can be effectively guaranteed, but also it can avoid the sintering temperature being too high and causing the metal wire feet to melt. In addition, since the first porous ceramic body pre-embedded with the first metal wire foot 31 and the second metal wire foot 32 is sintered in a vacuum environment or a protective atmosphere environment (in specific implementation, the first porous ceramic body pre-embedded with two metal wire feet can be placed in a sintering furnace with an inert gas for sintering), it can effectively prevent the two metal wire feet from being oxidized during the high-temperature sintering process and reducing their conductive properties.

[0091] In this embodiment, based on the above steps S10A to S10C, a first porous ceramic body 11 with two metal wire feet embedded in it can be obtained. Subsequently, thick film printing is performed between the first end of the first metal wire foot 31 and the first end of the second metal wire foot 32 by a thick film printing device, and the first metal heating film 21 with two ends respectively connected to the two metal wire feet can be printed on the first inner wall surface 111 of the first porous ceramic body 11. Compared with the first porous ceramic body 11 with two metal wire feet and one metal heating film obtained by the method of "first performing thick film printing and then welding the metal wire feet", this method The first porous ceramic body 11 with two metal wire feet and a metal heating film obtained by the method of "pre-embedding the metal wire feet and then performing thick film printing" is not only conducive to improving production efficiency, but also conducive to improving the connection reliability between the metal wire feet and the metal heating film. It can be understood here that if the end of the metal wire foot is welded to the end of the metal heating film by welding, it is difficult to weld the end of the metal wire foot to the end of the metal heating film because the thickness of the metal heating film is relatively thin (micrometer level). Even if they can be welded together, the bonding area of ​​the two is usually relatively small, which makes the metal The connection reliability between the wire foot and the metal heating film is poor and is prone to detachment. When the end of the metal wire foot is connected to the end of the metal heating film by thick film printing, the end of the metal heating film formed by thick film printing covers the end of the metal wire foot, so the combined area of ​​the two is large and is not easy to detach. In addition, when the end of the metal wire foot is connected to the end of the metal heating film by thick film printing, the metal wire foot will not experience the high temperature caused by welding, so it is less likely to oxidize. Moreover, since part of the metal wire foot buried in the first porous ceramic body 11 It is isolated from the external environment, so this part of the metal wire pin is not easily oxidized by the outside air and is not easily corroded by the aerosol generated by the tubular ceramic atomization core during subsequent use (it can be understood here that if the end of the metal wire pin is welded to the end of the metal heating film by welding, part of the metal wire pin will be exposed to the atomization channel 10 of the porous ceramic liquid conductor 1, making this part of the metal wire pin easily oxidized by the outside air and easily corroded by the aerosol generated by the tubular ceramic atomization core during subsequent use), so it is also beneficial to improve the conductivity and service life of the metal wire pin.

[0092] For further information, please refer to Figure 3-5 In some embodiments of the present invention, after the first porous ceramic body 11 pre-embedded with the first metal pin 31 and the second metal pin 32 is obtained through the above steps S10A to S10C, thick film printing can be performed on the first inner wall surface 111 of the first porous ceramic body 11. At this time, the step of printing the first metal heating film 21 on the first inner wall surface 111 of the first porous ceramic body 11 by using the thick film printing process includes:

[0093] S20A, taking the first end of the first metal wire foot 31 as the starting point and the first end of the second metal wire foot 32 as the ending point, thick film printing is performed on the first inner wall surface 111 of the first porous ceramic body 11 according to a predetermined tortuous printing path to obtain the first porous ceramic body 11 printed with the first metal heating film 21.

[0094] In this embodiment, based on the above step S20A, a first metal heating film 21 connected with two metal wire feet and arranged in a circuitous manner can be printed on the first inner wall surface 111 of the first porous ceramic body 11. Since the obtained first metal heating film 21 is arranged in a circuitous manner rather than in a straight line, the contact area between the first metal heating film 21 and the first inner wall surface 111 of the first porous ceramic body 11 can be increased, which is beneficial to improve the thermal efficiency of the tubular ceramic atomization core product obtained subsequently (specifically, more aerosol can be generated per unit time).

[0095] Similarly, in order to finally obtain a finished tubular ceramic atomizer core with electrode pins, so that when the finished tubular ceramic atomizer core is subsequently used in an electronic atomization device, it is convenient to electrically connect the second metal heating film 22 in the finished tubular ceramic atomizer core to the power control system in the electronic atomization device, in other embodiments of the present invention, a high-temperature sintering process with a sintering temperature of more than 700° C. is used to sinter and form the second porous ceramic body 12, including:

[0096] S10a, providing a third metal pin 33 and a fourth metal pin 34, and positioning the third metal pin 33 and the fourth metal pin 34 in a second mold at intervals;

[0097] S10b, injecting a second porous ceramic slurry into the second mold, and after the second porous ceramic slurry is cooled and formed, a second porous ceramic body pre-embedded with a third metal wire foot 33 and a fourth metal wire foot 34 is obtained, wherein a first end of the third metal wire foot 33 is exposed on the second inner wall surface 121, and a second end thereof is passed through an end surface of the second porous ceramic body, and a first end of the fourth metal wire foot 34 is exposed on the second inner wall surface 121, and a second end thereof is passed through an end surface of the second porous ceramic body;

[0098] S10c, in a vacuum environment or a protective atmosphere environment, the second porous ceramic body pre-embedded with the third metal wire pin 33 and the fourth metal wire pin 34 is sintered at a temperature of 700-1000°C to obtain a second porous ceramic body 12 with the third metal wire pin 33 and the fourth metal wire pin 34, wherein the protective atmosphere environment refers to an atmosphere environment filled with inert gas.

[0099] In this embodiment, based on the above steps S10a to S10c, a second porous ceramic body 12 pre-embedded with two metal wire pins can be obtained. It should be noted here that the relevant principles and effects of this embodiment are similar to those of the above embodiment in which the first porous ceramic body 11 pre-embedded with two metal wire pins can be obtained through steps S10A to S10C, and will not be repeated here.

[0100] Similarly, see Figure 3-5 In some embodiments of the present invention, after the second porous ceramic body 12 pre-embedded with the third metal pin 33 and the fourth metal pin 34 is obtained through the above steps S10a to S10c, thick film printing can be performed on the first inner wall surface 111 of the first porous ceramic body 11. At this time, in some embodiments, the step of printing the second metal heating film 22 on the second inner wall surface 121 using the thick film printing process includes:

[0101] S20B, taking the first end of the third metal wire foot 33 as the starting point and the first end of the fourth metal wire foot 34 as the ending point, thick film printing is performed on the second inner wall surface 121 according to a predetermined tortuous printing path to obtain a second porous ceramic body 12 printed with a second metal heating film 22.

[0102] In this embodiment, based on the above step S20B, a second metal heating film 22 connected with two metal wire feet and arranged in a circuitous manner can be printed on the second inner wall surface 121 of the second porous ceramic body 12. It should be noted here that the relevant principles and effects of this embodiment are similar to those of the above embodiment based on step S20A, and will not be repeated here.

[0103] It can be understood here that based on the above steps S10A~S10C and step S20A, a first porous ceramic body 11 with two metal wire feet and a metal heating film can also be obtained. Based on the above steps S10a~S10c and step S20B, a second porous ceramic body 12 with two metal wire feet and a metal heating film can also be obtained. After the first porous ceramic body 11 and the second porous ceramic body 12 are subsequently spliced ​​into one, a tubular ceramic atomization core with four electrode wire feet and two metal heating films can also be obtained.

[0104] Further, after obtaining the first porous ceramic body 11 with two metal wire feet and a metal heating film and the second porous ceramic body 12 with two metal wire feet and a metal heating film, the first porous ceramic body 11 and the second porous ceramic body 12 can be spliced ​​into one body by mechanical connection or by a low-temperature sintering process with a sintering temperature below 600°C, thereby obtaining a tubular ceramic atomization core product with four electrode wire feet and two metal heating films that have not been oxidized at high temperature (above 700°C), as follows:

[0105] Method 1: The first porous ceramic body 11 printed with the first metal heating film 21 and the second porous ceramic body 12 printed with the second metal heating film 22 are spliced ​​into one piece by mechanical connection. Specifically: Figure 5 As shown, in some embodiments of the present invention, the first porous ceramic body 11 further has a first splicing surface 112 and a second splicing surface 113 located on both sides of the first inner wall surface 111 along the circumference of the first porous ceramic body 11, and the second porous ceramic body 12 further has a third splicing surface 122 and a fourth splicing surface 123 located on both sides of the second inner wall surface 121 along the circumference of the second porous ceramic body 12, the first splicing surface 112 is provided with a first clamping portion 114, the second splicing surface 113 is provided with a second clamping portion 115, the third splicing surface 122 is provided with a third clamping portion 124 adapted to the first clamping portion 114, and the fourth splicing surface 123 is provided with a fourth clamping portion 125 adapted to the second clamping portion 115, wherein the first clamping portion 114 is a groove or a protrusion, and the second clamping portion 115 is a groove or a protrusion, illustratively, as Figure 5 As shown, the first clamping portion 114 of the first porous ceramic body 11 is a groove, and the second clamping portion 115 of the second porous ceramic body 12 is a protrusion. Correspondingly, the third clamping portion 124 of the second porous ceramic body 12 is a protrusion, and the fourth clamping portion 125 of the second porous ceramic body 12 is a groove;

[0106] Based on the first porous ceramic body 11 and the second porous ceramic body 12 of the above-mentioned structural design, the steps of mechanically connecting the first porous ceramic body 11 printed with the first metal heating film 21 and the second porous ceramic body 12 printed with the second metal heating film 22 into one body include:

[0107] S30a, the first porous ceramic body 11 printed with the first metal heating film 21 and the second porous ceramic body 12 printed with the second metal heating film 22 are spliced ​​in such a way that the first splicing surface 112 of the first porous ceramic body 11 is opposite to the third splicing surface 122 of the second porous ceramic body 12, and the second splicing surface 113 of the first porous ceramic body 11 is opposite to the fourth splicing surface 123 of the second porous ceramic body 12, so that the first clamping portion 114 is engaged with the third clamping portion 124 and the second clamping portion 115 is engaged with the fourth clamping portion 125, thereby obtaining a finished atomizer core.

[0108] In this embodiment, based on the above step S30a, the first porous ceramic body 11 and the second porous ceramic body 12 can be snapped together to form an integrated whole, thereby obtaining a structurally stable tubular ceramic atomization core finished product. Since the first porous ceramic body 11 printed with the first metal heating film 21 and the second porous ceramic body 12 printed with the second metal heating film 22 can be snapped together to form an integrated whole at room temperature, the first metal heating film 21 and the second metal heating film 22 will not be severely oxidized by high temperatures above 700°C, thereby ensuring the heating stability of the metal heating film.

[0109] In the present embodiment, it should be noted that the first porous ceramic body 11 having the first clamping portion 114 and the second clamping portion 115 and the first porous ceramic body 11 having the third clamping portion 124 and the fourth clamping portion 125 can be obtained by mold forming and sintering. For related content, please refer to the description of the previous related embodiments. Those skilled in the art can understand that it will not be repeated here. In addition, the process of clamping the first porous ceramic body 11 printed with the first metal heating film 21 and the second porous ceramic body 12 printed with the second metal heating film 22 into one can be completed manually or by automated equipment (such as a manipulator), and this embodiment does not impose specific restrictions on this.

[0110] Method 2: A mechanical connection method different from that of method 1 is used to splice the first porous ceramic body 11 printed with the first metal heating film 21 and the second porous ceramic body 12 printed with the second metal heating film 22 into one body. Specifically: Figure 6 As shown, in some other embodiments of the present invention, the step of mechanically connecting the first porous ceramic body 11 printed with the first metal heating film 21 and the second porous ceramic body 12 printed with the second metal heating film 22 into one body includes:

[0111] S30A, providing a housing 4, wherein the housing 4 is in a hollow tubular shape and a first liquid inlet hole 41 and a second liquid inlet hole 42 are provided on a side wall of the housing 4 and are spaced apart from each other. The material of the housing 4 may be silicone, rubber, metal, glass, etc.;

[0112] S30B, combining the first porous ceramic body 11 printed with the first metal heating film 21 and the second porous ceramic body 12 printed with the second metal heating film 22 to form a porous ceramic liquid conductor 1;

[0113] S30C, clamp the porous ceramic liquid conductor 1 and install it into the shell 4 to fix the first porous ceramic body 11 and the second porous ceramic body 12, and make the outer wall of the first porous ceramic body 11 cover the first liquid inlet hole 41, and the outer wall of the second porous ceramic body 12 covers the second liquid inlet hole 42, so as to obtain a finished atomizer core.

[0114] In this embodiment, based on the above steps S30A to S30C, the first porous ceramic body 11 and the second porous ceramic body 12 are preliminarily assembled into a tubular porous ceramic liquid conductor 1, and then loaded into a matching shell 4 for fixation, so that a structurally stable tubular ceramic atomization core finished product can be obtained. Since the first porous ceramic body 11 printed with the first metal heating film 21 and the second porous ceramic body 12 printed with the second metal heating film 22 are loaded into the shell 4 for fixation to shape the porous ceramic liquid conductor 1, it can be carried out at room temperature. Therefore, the first metal heating film 21 and the second metal heating film 22 will not be severely oxidized by high temperatures above 700°C, thereby ensuring the heating stability of the metal heating film. It can be understood here that in the use scenario where the finished tubular ceramic atomization core of this embodiment is used in an electronic atomization device, the first porous ceramic body 11 can obtain the atomized liquid through the first liquid inlet hole 41 on the shell 4 and pass it to the first metal heating film 21 for heating and atomization, and the second porous ceramic body 12 can obtain the atomized liquid through the second liquid inlet hole 42 on the shell 4 and pass it to the second metal heating film 22 for heating and atomization.

[0115] In this embodiment, it should be noted that the process of loading the first porous ceramic body 11 printed with the first metal heating film 21 and the second porous ceramic body 12 printed with the second metal heating film 22 into the shell 4 for fixing to shape the porous ceramic liquid conductor 1 can be completed manually or by automated equipment (such as a robot), and this embodiment does not impose any specific restrictions on this.

[0116] Method three: a low temperature sintering process with a sintering temperature below 600°C can be used to splice the first porous ceramic body 11 printed with the first metal heating film 21 and the second porous ceramic body 12 printed with the second metal heating film 22 into one body. Specifically: Figure 7 As shown, in some other embodiments of the present invention, the first porous ceramic body 11 further comprises a first joint surface 112 and a second joint surface 113 located on both sides of the first inner wall surface 111 along the circumferential direction of the first porous ceramic body 11, and the second porous ceramic body 12 further comprises a third joint surface 122 and a fourth joint surface 123 located on both sides of the second inner wall surface 121 along the circumferential direction of the second porous ceramic body 12;

[0117] The step of splicing the first porous ceramic body 11 printed with the first metal heating film 21 and the second porous ceramic body 12 printed with the second metal heating film 22 into one piece by a low temperature sintering process with a sintering temperature below 600° C. comprises:

[0118] S301, coating a first ceramic glaze having a curing temperature lower than 600° C. on the first joint surface 112 and / or the third joint surface 122, and coating a second ceramic glaze having a curing temperature lower than 600° C. on the second joint surface 113 and / or the fourth joint surface 123;

[0119] S302, the first porous ceramic body 11 printed with the first metal heating film 21 and the second porous ceramic body 12 printed with the second metal heating film 22 are assembled in such a manner that the first assembly surface 112 is opposite to the third assembly surface 122 and the second assembly surface 113 is opposite to the fourth assembly surface 123, so as to form a porous ceramic liquid conductor 1;

[0120] S303, positioning the porous ceramic liquid conductor 1 in the third mold;

[0121] S304, placing the third mold filled with the porous ceramic liquid conductor 1 in a sintering furnace with a working temperature lower than 600°C, so that the first ceramic glaze and the second ceramic glaze are sintered and solidified to bond the first porous ceramic body 11 and the second porous ceramic body 12 into one body, thereby obtaining a finished atomizer core.

[0122] In this embodiment, based on the above steps S301 to S304, the first porous ceramic body 11 and the second porous ceramic body 12 can be bonded to each other as a whole, so that a tubular ceramic atomization core product with a stable structure can be obtained. Since the first porous ceramic body 11 printed with the first metal heating film 21 and the second porous ceramic body 12 printed with the second metal heating film 22 are bonded to each other as a whole in an environment with a temperature lower than 600°C, the first metal heating film 21 and the second metal heating film 22 will not be severely oxidized due to high temperatures above 700°C, thereby ensuring the heating stability of the metal heating film.

[0123] In the present embodiment, it should be noted that the first ceramic glaze and the second ceramic glaze, which are equivalent to the glue, can be purchased on the market, and their specific components are well known to those skilled in the art, and will not be repeated here. In addition, in the specific implementation, the specific working temperature of the sintering furnace can be flexibly determined according to the properties of the ceramic glaze used. For example, if the curing temperature of the ceramic glaze used is 100°C, the working temperature of the sintering furnace can be set to 100°C, 110°C, 150°C, 200°C, etc. For example, if the curing temperature of the ceramic glaze used is 300°C, the working temperature of the sintering furnace can be set to 300°C, 310°C, 320°C, 350°C, 400°C, etc. As long as the first porous ceramic body 11 and the second porous ceramic body 12 can be bonded to each other to form a porous ceramic liquid conductor 1 with a stable structure, and the two metal heating films will not be severely oxidized by the high temperature above 700°C, this embodiment does not impose specific restrictions on this.

[0124] Further, in some preferred embodiments of the present invention, the shape and size of the first porous ceramic body 11 are the same as the shape and size of the second porous ceramic body 12. For example, Figure 2-7 As shown, the first porous ceramic body 11 and the second porous ceramic body 12 are both semicircular tube structures of the same shape and size. In this way, the process of manufacturing the first porous ceramic body 11 with two metal wire feet and a metal heating film can be exactly the same as the process of manufacturing the second porous ceramic body 12 with two metal wire feet and a metal heating film. For example, the process including the above steps S10A to S10C can be exactly the same as the process including the above steps S10a to S10c. For another example, the process including the above step S20A can be exactly the same as the process including the above step S20B, so that the equipment (such as molds, etc.), materials (such as porous ceramic slurries, etc.), and process parameters (such as sintering temperature, etc.) involved in the relevant process can be shared, and among the many porous ceramic bodies obtained, any two porous ceramic bodies can be selected to form a tubular porous ceramic liquid conductor 1 without the need for special matching selection, which is more conducive to mechanized mass production, and thus helps to greatly reduce the production cost of the tubular ceramic atomization core.

[0125] Correspondingly, please refer to Figure 2-7 An embodiment of the present invention further provides an atomizer core, which is manufactured by the manufacturing method of the atomizer core in any of the above embodiments.

[0126] In this embodiment, thanks to the improvement of the manufacturing method of the atomizer core, the atomizer core of this embodiment has the advantages of high structural strength, good atomization performance and low production cost.

[0127] It should be noted that other contents of the atomizer core and the manufacturing method thereof disclosed in the embodiments of the present invention can be found in the prior art and will not be described in detail here.

[0128] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A method for manufacturing an atomizer core, characterized in that: The following steps are involved: A first porous ceramic body and a second porous ceramic body are sintered and formed respectively by a high-temperature sintering process with a sintering temperature of 700° C. or higher, wherein the first porous ceramic body and the second porous ceramic body are used to form a porous ceramic liquid-conducting body, the porous ceramic liquid-conducting body is in a hollow tubular shape to form an atomization channel, the first porous ceramic body has a first inner wall surface for forming the atomization channel, and the second porous ceramic body has a second inner wall surface for forming the atomization channel; A first metal heating film is printed on the first inner wall surface and a second metal heating film is printed on the second inner wall surface by using a thick film printing process; The first porous ceramic body printed with the first metal heating film and the second porous ceramic body printed with the second metal heating film are spliced ​​together to obtain a finished atomizer core with a metal heating film that has not undergone high-temperature oxidation printed on its inner wall.

2. The method for manufacturing the atomizer core according to claim 1, characterized in that: The step of sintering the first porous ceramic body by a high temperature sintering process at a sintering temperature of 700° C. or higher comprises: Providing a first metal pin and a second metal pin, and positioning the first metal pin and the second metal pin in a first mold at intervals; Injecting a first porous ceramic slurry into the first mold, and after the first porous ceramic slurry is cooled and formed, a first porous ceramic body pre-embedded with the first metal wire foot and the second metal wire foot is obtained, wherein the first end of the first metal wire foot is exposed on the first inner wall surface, and the second end is passed through an end surface of the first porous ceramic body, and the first end of the second metal wire foot is exposed on the first inner wall surface, and the second end is passed through the end surface of the first porous ceramic body; In a vacuum environment or a protective atmosphere environment, sintering the first porous ceramic body pre-embedded with the first metal wire foot and the second metal wire foot at a temperature of 700° C. to 1100° C. to obtain the first porous ceramic body with the first metal wire foot and the second metal wire foot, wherein the protective atmosphere environment is an atmosphere environment filled with inert gas; or, The step of sintering the second porous ceramic body by a high temperature sintering process at a sintering temperature of 700° C. or higher comprises: Providing a third metal pin and a fourth metal pin, and positioning the third metal pin and the fourth metal pin in a second mold at intervals; Injecting a second porous ceramic slurry into the second mold, and after the second porous ceramic slurry is cooled and formed, a second porous ceramic body pre-embedded with the third metal wire foot and the fourth metal wire foot is obtained, wherein the first end of the third metal wire foot is exposed on the second inner wall surface, and the second end is passed through an end surface of the second porous ceramic body, and the first end of the fourth metal wire foot is exposed on the second inner wall surface, and the second end is passed through the end surface of the second porous ceramic body; In a vacuum environment or a protective atmosphere environment, the second porous ceramic body pre-embedded with the third metal wire pin and the fourth metal wire pin is sintered at a temperature of 700 to 1000°C to obtain the second porous ceramic body with the third metal wire pin and the fourth metal wire pin, wherein the protective atmosphere environment is an atmosphere environment filled with inert gas.

3. The method for manufacturing an atomizer core according to claim 2, characterized in that: The step of printing the first metal heating film on the first inner wall surface by using a thick film printing process comprises: Taking the first end of the first metal wire foot as the starting point and the first end of the second metal wire foot as the ending point, thick film printing is performed on the first inner wall surface according to a predetermined circuitous printing path to obtain the first porous ceramic body printed with the first metal heating film; or, The step of printing the second metal heating film on the second inner wall surface by using a thick film printing process comprises: Taking the first end of the third metal wire foot as the starting point and the first end of the fourth metal wire foot as the ending point, thick film printing is performed on the second inner wall surface according to a predetermined tortuous printing path to obtain the second porous ceramic body printed with the second metal heating film.

4. The method for manufacturing an atomizer core according to claim 1, characterized in that: After the steps of printing the first metal heating film on the first inner wall surface and the second metal heating film on the second inner wall surface respectively by using a thick film printing process, the method further includes: Providing a first metal pin and a second metal pin, and welding one end of the first metal pin to the first end of the first metal heating film, and welding one end of the second metal pin to the second end of the first metal heating film; and / or, A third metal pin and a fourth metal pin are provided, and one end of the third metal pin is welded to the first end of the second metal heating film, and one end of the fourth metal pin is welded to the second end of the second metal heating film.

5. The method for manufacturing an atomizer core according to claim 1, characterized in that: The first porous ceramic body further comprises a first joint surface and a second joint surface located on both sides of the first inner wall surface along the circumference of the first porous ceramic body, and the second porous ceramic body further comprises a third joint surface and a fourth joint surface located on both sides of the second inner wall surface along the circumference of the second porous ceramic body, the first joint surface is provided with a first clamping portion, the second joint surface is provided with a second clamping portion, the third joint surface is provided with a third clamping portion matched with the first clamping portion, and the fourth joint surface is provided with a fourth clamping portion matched with the second clamping portion, wherein the first clamping portion is a groove or a protrusion, and the second clamping portion is a groove or a protrusion; The step of splicing the first porous ceramic body printed with the first metal heating film and the second porous ceramic body printed with the second metal heating film into one body comprises: The first porous ceramic body printed with the first metal heating film and the second porous ceramic body printed with the second metal heating film are spliced ​​in such a way that the first splicing surface is opposite to the third splicing surface and the second splicing surface is opposite to the fourth splicing surface, so that the first clamping part is engaged with the third clamping part and the second clamping part is engaged with the fourth clamping part, thereby obtaining the finished atomizer core.

6. The method for manufacturing an atomizer core according to claim 1, characterized in that: The step of splicing the first porous ceramic body printed with the first metal heating film and the second porous ceramic body printed with the second metal heating film into one body comprises: A shell is provided, wherein the shell is in a hollow tubular shape and a first liquid inlet hole and a second liquid inlet hole are provided on a side wall of the shell. The first porous ceramic body printed with the first metal heating film and the second porous ceramic body printed with the second metal heating film are assembled to form the porous ceramic liquid conductor; The porous ceramic liquid conductor is clamped and installed in the shell to fix the first porous ceramic body and the second porous ceramic body, and the outer wall of the first porous ceramic body covers the first liquid inlet hole and the outer wall of the second porous ceramic body covers the second liquid inlet hole, thereby obtaining the finished atomizer core.

7. The method for manufacturing an atomizer core according to claim 1, characterized in that: The first porous ceramic body further comprises a first joint surface and a second joint surface located on both sides of the first inner wall surface along the circumference of the first porous ceramic body, and the second porous ceramic body further comprises a third joint surface and a fourth joint surface located on both sides of the second inner wall surface along the circumference of the second porous ceramic body; The step of splicing the first porous ceramic body printed with the first metal heating film and the second porous ceramic body printed with the second metal heating film into one body comprises: Applying a first ceramic glaze having a curing temperature lower than 600° C. on the first joint surface and / or the third joint surface, and applying a second ceramic glaze having a curing temperature lower than 600° C. on the second joint surface and / or the fourth joint surface; The first porous ceramic body printed with the first metal heating film and the second porous ceramic body printed with the second metal heating film are spliced ​​in such a manner that the first splicing surface is opposite to the third splicing surface and the second splicing surface is opposite to the fourth splicing surface, so as to form the porous ceramic liquid conductor; Positioning the porous ceramic liquid conductor in a third mold; The third mold filled with the porous ceramic liquid conductor is placed in a sintering furnace with a working temperature lower than 600° C., so that the first ceramic glaze and the second ceramic glaze are sintered and solidified to bond the first porous ceramic body and the second porous ceramic body into one, thereby obtaining the finished atomizer core.

8. The method for manufacturing an atomizer core according to any one of claims 2 to 4, characterized in that: The first metal pin, the second metal pin, the third metal pin and the fourth metal pin are all made of copper or nickel, and the surfaces of the first metal pin, the second metal pin, the third metal pin and the fourth metal pin are all covered with an anti-oxidation layer made of gold or silver, and the thickness of the anti-oxidation layer is 10 to 30 microns.

9. The method for manufacturing an atomizer core according to any one of claims 1 to 7, characterized in that: The shape and size of the first porous ceramic body are the same as the shape and size of the second porous ceramic body; And / or, the porous ceramic liquid conductor is a circular tubular structure with a hollow interior.

10. An atomizer core, characterized in that: The atomizer core is manufactured by the atomizer core manufacturing method according to any one of claims 1 to 9.

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