Heating assembly for electronic cigarette and preparation process of heating tube of heating assembly

[0047] Example one:

[0048] The heating component for electronic cigarettes using solid cartridges is composed of a heating tube and an electrode ring 3. The heating tube is composed of a quartz glass tube 1 and a heating layer 2 printed on the outer surface of the quartz glass tube with conductive paste. The tube 1 can transfer the heat generated by the heating layer to the inside to heat the electronic cigarette cartridge placed inside the quartz glass tube 1; the inner diameter of the electrode ring 3 matches the outer diameter of the quartz glass tube 1 and is sleeved in the quartz glass Both ends of the tube 1 are electrically connected to the heating layer 2. The above is a specific structure description of the heating component of the present invention. The present invention adopts external heating and internal heating when in use. This heating method can make the electronic cigarette cartridge be heated evenly, the smoke is pure, and the cartridge has a long service life. The layer 2 is not in direct contact with the cartridge, which not only avoids the friction between the heating layer 2 and the solid cartridge, but also greatly reduces the smoke emitted from the solid cartridge due to the heating layer contacting the solid cartridge, thus avoiding the heating temperature of the existing heating components. , The heating is uneven and the service life of heating components is short.

[0049] The following is to address the problem of uneven layout of sintered coatings on quartz glass tubes in electronic paste printing in this industry. The present invention proposes a screen printing process for printing conductive paste on a tubular body. The process includes the following steps :

[0050] Step 1. Selecting the screen: this process uses 325 mesh stainless steel wire mesh, aluminum frame, the screen tension is 25 degrees, the screen tension is 30N, the film thickness is 70μm, and the ratio of picture to text is 25%. Screen printing machine, the screen printing machine is installed in the screen printing machine, the above-mentioned screen printing machine is a common equipment in the industry, those skilled in the art can choose according to the various parameters provided by the process of the present invention, here is no longer tired Narrate

[0051] Step 2: Fix the quartz glass tube: adjust the distance between the quartz glass tube and the screen gap to control the distance to 1.5 mm;

[0052] Step 3. Selection and adjustment of squeegee: a sharp-edged squeegee with a Shore hardness of 75 and adjust the angle of the squeegee so that the angle between the squeegee and the screen is 80°;

[0053] Step 4. Printing: Add conductive paste on the screen and adjust the printing speed to 30mm/s to start printing;

[0054] Step 5. Surface dry sintering. Put the printed quartz glass tube into a 150-200 environment and dry the surface for 5-10 minutes, then raise the temperature to the temperature and time required for the sintering of the slurry (for example, at a sintering temperature of 800-900 ℃, the sintering time is 15-20min) for sintering, and let it cool naturally after sintering.

[0055] The heating element of the electronic cigarette of the present invention can be obtained by connecting the two ends of the obtained heating tube to the electrode ring.

[0056] Embodiment two:

[0057] The structure of the heating element is as in the first embodiment.

[0058] The following is to address the problem of uneven layout of sintered coatings on quartz glass tubes in electronic paste printing in this industry. The present invention proposes a screen printing process for printing conductive paste on a tubular body. The process includes the following steps :

[0059] Step 1. Screen selection: This process uses polyester mesh with a mesh size of 270 mesh, an aluminum mesh frame, a screen stretching angle of 20 degrees, a screen tension of 25N, a film thickness of 20μm, and a screen with a frame ratio of 25. Plate, put the screen into the screen printing machine;

[0060] Step 2: Fix the substrate, choose ceramic tubes as the substrate, adjust the distance between the substrate and the screen gap, and control the distance to 1.7 mm;

[0061] Step 3. Choose a flat blade with a Shore hardness of 70, and adjust the angle of the blade so that the angle between the blade and the screen is 55°;

[0062] Step 4: Start printing, add conductive paste on the screen, adjust the printing speed to 45mm/s and start printing;

[0063] Step 5. Surface dry sintering. Put the printed tubular body in an environment of 150-200℃ and dry it on the surface for 5-10 minutes, then raise the temperature to the temperature required for the sintering of the slurry to be sintered, and let it cool naturally after sintering.

[0064] The heating element of the electronic cigarette of the present invention can be obtained by connecting the two ends of the obtained heating tube to the electrode ring.

[0065] The third embodiment: the structure of the heating component is as the first embodiment.

[0066] The following is to address the problem of uneven layout of sintered coatings on quartz glass tubes in electronic paste printing in this industry. The present invention proposes a screen printing process for printing conductive paste on a tubular body. The process includes the following steps :

[0067] Step 1. Selecting the mesh plate: This process uses stainless steel wire mesh with a mesh size of 380 mesh, a steel mesh frame, the screen tension is 30 degrees, the screen tension is 30N, the film thickness is 50μm, and the picture-text frame ratio is 30%. Screen, put the screen into the screen printing machine;

[0068] Step 2. Fix the substrate, select a quartz tube as the substrate, and adjust the distance between the substrate and the screen to control the distance to 1.5 mm;

[0069] Step 3. Choose a sharp-edged scraper with a Shore hardness of 80, and adjust the angle of the scraper so that the angle between the scraper and the screen is 60°;

[0070] Step 4: Start printing, add conductive paste on the screen, adjust the printing speed to 20mm/s and start printing;

[0071] Step 5. Surface dry sintering. Put the printed tubular body in an environment of 150-200℃ and dry it on the surface for 5-10 minutes, then raise the temperature to the temperature required for the sintering of the slurry to be sintered, and let it cool naturally after sintering.

[0072] The heating element of the electronic cigarette of the present invention can be obtained by connecting the two ends of the obtained heating tube to the electrode ring.

[0073] The following experiment is to verify the printing uniformity of the heating layer and the heating performance of the heating component of the present invention.

[0074] The conductive paste used in this test is a patented technology independently developed by the company. The patent was applied for on 2019-01-24, and its application number is 201910065939.9. The patent name is a method for preparing and using electric heating resistor paste. The sintering temperature of the conductive paste is 800°C-850°C and the sintering time is 15-20min. It is used in the printing process of Examples 1 to 3 to be printed on the corresponding tubular body, and obtained by Examples 1 to 3. The heating tube of the heating tube is measured by a precision resistance tester to measure the resistance of each part of the heating layer, and the uniformity of the printing is judged by the difference of the resistance of each part. After the test is completed, the electrode ring is connected to the heating tube and the heating rate is tested. .