Hollow pointed-end heating rod
The hollow pointed heating rod design solves the problems of large size and slow heating of ceramic heating rods, achieving miniaturization and rapid heating, thus improving the performance of electronic cigarettes.
Patent Information
- Application Number
- CN202520219936.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-12
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-02-12
AI Technical Summary
Existing ceramic heating rods in the electronic cigarette industry suffer from problems such as large size and slow heating, making it difficult to meet customers' demands for miniaturization and rapid heating.
The hollow pointed heating rod design is adopted. The auxiliary hard core rod is wound around the casting sheet twice and pressed together using isostatic pressing. Combined with high-temperature sintering, a hollow thin-walled heating tube is formed. An alumina pointed plug is installed at the end to form a hollow thin-walled part, which achieves small size and fast heating.
This results in a smaller and lighter heating rod, a 1.5-2 times faster heating speed, reduced material costs, and environmental friendliness and efficiency.
Smart Images
Figure CN223913490U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electronic cigarette heating rod technology, specifically to a hollow pointed heating rod. Background Technology
[0002] With the increasing adoption of ceramic heating rods in the e-cigarette industry, they have gradually replaced older metal heating wires as the mainstream heating element. However, this has led to increasingly higher customer demands for ceramic heating rods, requiring smaller sizes and faster heating. Conventional heating rod manufacturing processes have essentially reached a bottleneck in these areas, especially in terms of heating performance, where further breakthroughs are no longer possible. Utility Model Content
[0003] To address the shortcomings of existing technologies, this utility model provides a hollow pointed heating rod that is small in size and heats up quickly. To achieve the above objectives, this utility model is implemented through the following technical solution:
[0004] A hollow pointed heating rod, comprising:
[0005] The heating element is a hollow, thin-walled part formed by winding a cast sheet around an auxiliary rigid core rod twice, pressing it together using an isostatic pressing process, and then removing the rigid core rod after pressing. The cast sheet is coated with glue at the end in the winding direction. The heating circuit is printed on the cast sheet, and the electrodes of the heating circuit are connected to leads. The heating element has a first end for mounting the leads and a second end for mounting the pointed plug.
[0006] The pointed plug includes a conical head and a cylindrical insertion part. The cylindrical insertion part is tightly inserted into the inner hole of the second end of the heating tube body, while the conical head is exposed outside the heating tube body. The pointed plug and the heating tube body are sintered into one piece.
[0007] Preferably, the pointed plug and the heating tube are sintered together at a temperature of 1600°C.
[0008] Preferably, after the cast film is wound around an auxiliary hard mandrel twice, it is pressed together under a pressure of 300 MPa using an isostatic pressing process.
[0009] Preferably, the pointed plug is an alumina pointed plug made by hot die casting.
[0010] Preferably, the heating circuit is a thick-film circuit.
[0011] Preferably, the cast sheet is an alumina cast sheet.
[0012] This utility model has the following beneficial effects:
[0013] The hollow pointed heating rod provided by this utility model has a smaller actual volume compared to conventional solid hollow heating rods because its heating tube is hollow, and consequently, its mass is also smaller. Based on the formula for specific heat capacity, Q = cmΔt (where Q represents heat, c represents specific heat capacity, m represents mass, and Δt represents the changing temperature), we derive Δt = Q / cm. Therefore, for the same amount of heat and the same specific heat capacity, temperature and mass are inversely proportional. While meeting the same functional requirements, the hollow heating rod provided by this utility model can increase the heating speed, use less material, save costs, and is more environmentally friendly. Attached Figure Description
[0014] Figure 1 This is a structural diagram of a solid heating rod in the prior art;
[0015] Figure 2 This is a schematic diagram of the hollow pointed heating rod of this utility model;
[0016] Figure 3 This is a schematic diagram of the casting sheet and mandrel winding process of this utility model;
[0017] Figure 4 yes Figure 3 Enlarged view of point A in the middle
[0018] Figure 5 This is a top view of the initial state of the cast film and mandrel winding;
[0019] Figure 6 This is a schematic diagram illustrating the process of the mandrel detaching from the heating element;
[0020] Figure 7 This is a schematic diagram of the assembly process of the pointed plug and the heating tube. Detailed Implementation
[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0023] like Figures 2 to 7 As shown, this embodiment discloses a hollow pointed heating rod, comprising:
[0024] The heating tube body 3 is a hollow thin-walled part formed by winding the casting sheet 2 around an auxiliary hard core rod 1 twice, and then pressing it under 300MPa pressure using an isostatic pressing process. After pressing, the hard core rod 1 is extracted.
[0025] The casting sheet 2 is coated with glue 7 at its end in the winding direction;
[0026] The casting film 2 has a heating circuit 5 printed on it. The electrodes of the heating circuit 5 are connected to leads 6. The heating tube body 3 has a first end for mounting the leads 6 and a second end for mounting the pointed plug 4.
[0027] The pointed plug 4 includes a conical head and a cylindrical insertion part. The cylindrical insertion part is tightly inserted into the inner hole of the second end of the heating tube body 3, while the conical head is exposed outside the heating tube body 3. The pointed plug 4 and the heating tube body 3 are sintered together at a high temperature of 1600℃.
[0028] Preferably, the heating circuit is a thick-film circuit.
[0029] Preferably, the hard core rod 1 is a hard solid rod with a smooth outer wall, and the material can be stainless steel or other hard materials.
[0030] Preferably, the pointed plug 4 is an alumina pointed plug, but it is not limited to this and other materials may also be used. Preferably, the alumina pointed plug is made by hot die casting.
[0031] Preferably, the cast sheet 2 is an alumina cast sheet, but it is not limited to this; for example, it can also be a composite material.
[0032] The manufacturing process of the hollow pointed heating rod in this embodiment is as follows: a cast film with printed heating circuit is rolled onto a rigid solid rod. The cast film is rolled twice, and its winding end (that is, the end of the outer ring) is glued to the surface of the inner ring with glue 7. Then, an isostatic pressing process is used to press it together under a high pressure of 300MPa. Due to the high pressure compaction, the heating tube 3 can maintain its shape without deformation. After pressing, the solid rod in the middle is pulled out to obtain a thin-walled heating tube 3. Then, an alumina pointed plug made by hot pressing is inserted into one end of the heating tube 3 so that the inner wall of the heating tube 3 is tightly joined with the cylindrical insertion part of the pointed plug 4. Then, the heating tube 3 and the pointed plug 4 are sintered into one piece at a high temperature of 1600℃ to obtain the heating rod described in this embodiment.
[0033] In other embodiments, the isostatic pressing process for bonding the wound cast sheet is not limited to a pressure of 300 MPa, but can also be higher than 300 MPa. In other embodiments, the sintering temperature for the head plug 4 and the heating tube 3 can also be higher than 1600°C.
[0034] like Figure 7The small heating rod shown, with a diameter of 2.0mm, is primarily used (but not limited to) in the electronic cigarette industry. The pointed tip design at the end of the heating rod facilitates smooth insertion into the tobacco for heating. Its unique hollow design reduces the heat load, allowing it to heat up 1.5-2 times faster than conventional solid heating rods within the same volume and power.
[0035] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model. Therefore, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
Claims
1. A hollow-tipped heating rod, characterized by, The application relates to a heating tube body, a heating tube body manufacturing method and a sharp plug. The heating tube body is a hollow thin-wall part formed by winding a casting sheet around an auxiliary hard core rod for two turns and then using an isostatic pressing process to press and combine, and then extracting the hard core rod. The casting sheet is coated with glue at the end of the winding direction. The heating tube body has a first end for mounting the lead wire and a second end for mounting the sharp plug. The sharp plug comprises a conical head and a cylindrical insertion part, the cylindrical insertion part is tightly inserted into the inner hole of the second end of the heating tube body, the conical head is exposed outside the heating tube body, and the sharp plug and the heating tube body are sintered into one body.
2. The hollow-tipped heat stick of claim 1, wherein, The sharp plug and the heating tube body are sintered into one body at a temperature of 1600 DEG C.
3. A hollow-tipped heating rod according to claim 1 or 2, characterized in that After the casting sheet is wound around the auxiliary hard core rod for two turns, the isostatic pressing process is used to press and combine under a pressure of 300 MPa.
4. The hollow-tipped heat stick of claim 3, wherein, The sharp plug is an alumina sharp plug made by a hot-pressing casting process.
5. The hollow-tipped heat stick of claim 3, wherein, The heating circuit is a thick film circuit.
6. The hollow-tipped heat stick of claim 3, wherein, The casting sheet is an alumina casting sheet.