Injection mold and manufacturing method of heating device

Abstract

The application discloses an injection mold for manufacturing a heating device, which comprises a frame, at least one electric resistance heating sheet and at least one support, the electric resistance heating sheet is connected with the frame, and the electric resistance heating sheet is at least partially embedded in the support by injection molding. The injection mold comprises a first mold and a second mold. The first mold is provided with at least one first injection slot and a first bearing table in the first injection slot. The second mold is provided with at least one second injection slot and a second bearing table in the second injection slot. When the second mold is combined with the first mold, the first injection slot and the second injection slot are combined into an injection cavity for forming the support by injection molding, and the gap between the first bearing table and the second bearing table in the vertical direction is equal to the thickness of the electric resistance heating sheet. The injection mold can form the support on the electric resistance heating sheet by injection molding, and the production efficiency is high and the manufacturing cost is low. The application further provides a manufacturing method of the heating device.

Description

Technical Field

[0001] This invention relates to the field of mold technology, and in particular to a method for manufacturing an injection mold and a heating element. Background Technology

[0002] The atomizer is the core component of electronic atomization products, and the reliability of the atomizer determines the quality of the entire atomization product.

[0003] One existing atomization structure consists of a porous ceramic material with a printed heating paste or a metal resistive heating element embedded in its surface. Both methods use porous ceramic as the oil-conducting material to absorb e-liquid onto the surface of the resistive heating element. When the resistive heating element is powered on, it generates heat to atomize the e-liquid. The ceramic forming process of these atomization structures is complex, the yield rate is low, and the consistency of the ceramic is poor. Therefore, the product cost is high, and the oil-conducting properties of the ceramic are slightly poor, which can easily produce a burnt taste and slightly poor taste reproduction.

[0004] Another existing atomization structure is: a spiral resistance heating wire is wound around the surface of the transverse cotton core. The transverse cotton core absorbs the e-liquid onto the surface of the resistance heating wire. When the resistance heating wire is energized, it generates heat and atomizes the e-liquid. This type of atomization structure makes the transverse cotton core very easy to deform, which makes assembly difficult. Moreover, the long oil guiding distance makes it easy to produce a burnt taste.

[0005] Another existing atomization structure is as follows: the outer surface of the vertical cotton core resistor heating element is wrapped with oil-guiding cotton, and the inner side of the resistor heating element is hollow; the oil-guiding cotton wrapped on the outer surface absorbs the e-liquid to the surface of the resistor heating element, and heat is generated when the resistor heating wire is energized, thereby atomizing the e-liquid; this type of atomization structure has many parts in the vertical cotton core structure, and the assembly is complicated, resulting in high product cost.

[0006] The above-mentioned atomization structure is complicated to manufacture, and the atomization structure is assembled from multiple parts, resulting in high manufacturing costs, low production efficiency, and inability to meet the needs of automated production. Summary of the Invention

[0007] In view of this, the present invention provides an injection mold that can form a support on a resistance heating element by injection molding, which has high production efficiency and low manufacturing cost.

[0008] An injection mold is provided for manufacturing a heating device. The heating device includes a frame, at least one resistive heating element, and at least one support. The resistive heating element is connected to the frame and is at least partially embedded in the support by injection molding. The injection mold includes a first mold and a second mold. The first mold has at least one first injection groove and a first support platform located in the first injection groove. The second mold has at least one second injection groove and a second support platform located in the second injection groove. When the second mold and the first mold are closed, the first injection groove and the second injection groove combine to form an injection cavity for injection molding the support. The gap between the first support platform and the second support platform in the vertical direction is equal to the thickness of the resistive heating element.

[0009] In an embodiment of the present invention, the first mold includes a first mold closing plane, the first injection groove is disposed on the first mold closing plane, the second mold includes a second mold closing plane, the second injection groove is disposed on the second mold closing plane, and when the second mold and the first mold are molded together, the first mold closing plane and the second mold closing plane are in contact with each other.

[0010] In an embodiment of the present invention, the first mold closing plane is provided with at least one first receiving groove and at least one second receiving groove. The first receiving groove is arranged around the first injection molding groove, and the second receiving groove connects the first receiving groove and the first injection molding groove. The first receiving groove is used to receive the frame, and the second receiving groove is used to receive the portion of the resistive heating element that extends out of the first injection molding groove.

[0011] In an embodiment of the present invention, the frame and the resistive heating element are sheet-like, the thickness of the frame is equal to the depth of the first receiving groove, and the thickness of the resistive heating element is equal to the depth of the second receiving groove.

[0012] In an embodiment of the present invention, the first mold is provided with multiple fixing posts, the ends of each fixing post are fixed in the first receiving groove, the frame is provided with multiple through holes that cooperate with each fixing post, and the second mold closing plane is provided with multiple fixing holes. When the second mold and the first mold are closed, each fixing post is inserted into each fixing hole.

[0013] In an embodiment of the present invention, the first mold closing plane is fixed with a plurality of positioning blocks, and the second mold closing plane is provided with a plurality of positioning grooves. When the second mold and the first mold are closed, each of the positioning blocks is inserted into each of the positioning grooves.

[0014] In an embodiment of the present invention, the bracket includes a base plate and sidewalls extending upward from the periphery of the base plate, forming a receiving cavity between the base plate and the sidewalls, and an atomizing groove is provided through the base plate; the first injection molding groove includes a first groove wall and a first groove bottom, the first support platform is fixed to the first groove bottom, and a first annular groove is formed between the first groove wall and the side of the first support platform, the first annular groove being used for injection molding to form the sidewall; the second injection molding groove includes a second groove wall and a second groove bottom, the second support platform is fixed to the second groove bottom, and a second annular groove is formed between the second groove wall and the side of the second support platform, the second annular groove being used for injection molding to form the base plate, the first support platform being used to form the receiving cavity, and the second support platform being used to form the atomizing groove.

[0015] In an embodiment of the present invention, the first support platform includes a first support surface, the second support platform includes a second support surface, both the first support surface and the second support surface are planes, the height of the first support surface is lower than the first mold closing plane, and the second support surface and the second mold closing plane are located on the same horizontal plane;

[0016] After the injection mold forms the bracket, the upper surface of the resistive heating element and the upper surface of the base plate are on the same horizontal plane.

[0017] In an embodiment of the present invention, the resistive heating element includes two first connecting portions, two second connecting portions, and a heating portion. The heating portion is connected between the two first connecting portions. Each first connecting portion includes a middle section and two first embedded sections. The middle section is connected between the two first embedded sections. Each of the two second connecting portions includes a second embedded section, a third embedded section, and an extension section. The second embedded section is connected to the first connecting portion. The third embedded section is connected between the second embedded section and the extension section. The extension section is connected to the frame.

[0018] After the injection mold forms the bracket, the heating element spans the atomizing groove, the lower surfaces of the two intermediate sections are embedded in the base plate, the upper surfaces of the two intermediate sections are exposed in the receiving cavity, the two first embedded sections are embedded at the connection between the base plate and the side wall, the lower surface of the second embedded section is embedded in the base plate, the upper surface of the second embedded section is exposed in the receiving cavity, the third embedded section is embedded at the connection between the base plate and the side wall, and the extension section is disposed outside the bracket.

[0019] In an embodiment of the present invention, the heating element is provided with a plurality of through holes, and a resistance heating wire is between two adjacent through holes. The heating element includes two oppositely arranged embedded parts, and the resistance heating wire is connected between the two embedded parts. The embedded part includes a plurality of embedded pins arranged at intervals. A notch is formed between two adjacent embedded pins and between the first connecting part and the adjacent embedded pin. The embedded pin includes a suspended section, a fourth embedded section and a fifth embedded section. The suspended section is connected between the resistance heating wire and the fourth embedded section, and the fifth embedded section is connected to the fourth embedded section.

[0020] After the injection mold forms the bracket, the resistance heating wire and the suspended section are arranged corresponding to the atomizing groove. The lower surface of the fourth embedded section is embedded in the base plate, the upper surface of the fourth embedded section is exposed in the receiving cavity, and the fifth embedded section is embedded at the connection between the base plate and the side wall.

[0021] In an embodiment of the present invention, two pads are fixed to the bottom of the second groove. The two pads are respectively located on opposite sides of the second support platform. One end of the pad is fixed to the side of the second support platform, and the other end of the pad extends toward the wall of the second groove. The thickness of the pad gradually decreases from the side of the second support platform toward the wall of the second groove.

[0022] When the second mold is closed with the first mold, the lower surface of the resistive heating wire and the suspended section is in contact with the second bearing surface, and the fourth embedded section and the fifth embedded section are located above the pad block;

[0023] After the injection mold forms the bracket, the second injection groove forms an inclined portion of the base plate at the pad, and the thickness of the inclined portion gradually decreases from the second groove wall toward the direction closer to the second support platform.

[0024] In an embodiment of the present invention, the pad includes an inclined surface extending obliquely from the side of the second support platform to the second groove wall, the inclined surface being a plane or an arc surface.

[0025] In an embodiment of the present invention, the minimum vertical distance between the second bearing surface and the inclined surface is 0.1 mm to 2 mm.

[0026] In an embodiment of the present invention, the heating element includes a plurality of heating brackets connected side by side. Each heating bracket has embedded pins at its opposite ends. A notch is formed between two adjacent embedded pins and between the first connecting part and the adjacent embedded pin. The embedded pin includes a suspended section, a fourth embedded section and a fifth embedded section. The suspended section is located inside the heating bracket, and the fourth embedded section is connected between the suspended section and the fifth embedded section.

[0027] After the injection mold forms the bracket, the middle part of each heating bracket and the suspended section are arranged corresponding to the atomizing groove. The lower surface of the fourth embedded section is embedded in the base plate, the upper surface of the fourth embedded section is exposed in the receiving cavity, and the fifth embedded section is embedded at the connection between the base plate and the side wall.

[0028] In an embodiment of the present invention, the second support platform includes two symmetrically arranged inclined surfaces, which are located between the bottom of the second groove and the second support surface. Each inclined surface is inclined along the direction of the second support platform toward the second groove wall. The heating part of the resistive heating element is provided with multiple through holes, and a resistive heating wire is between two adjacent through holes. The heating part includes two oppositely arranged embedded parts, and the resistive heating wire is connected between the two embedded parts. The embedded part includes multiple embedded pins arranged at intervals, and a notch is formed between two adjacent embedded pins.

[0029] When the second mold and the first mold are closed, the heating element is sandwiched between the first bearing surface and the second bearing surface, the first part of the embedded pin is sandwiched between the first bearing surface and the second bearing surface, and the second part of the embedded pin is suspended between the inclined surface of the second bearing platform and the bottom of the first groove.

[0030] In an embodiment of the present invention, the third portion of the aforementioned embedded pin is suspended between the bottom of the second slot and the bottom of the first slot.

[0031] In an embodiment of the present invention, the above-mentioned resistive heating element includes two first connecting portions and a heating portion, wherein the heating portion is connected between the two first connecting portions;

[0032] When the second mold and the first mold are closed, the first part of the first connecting part is sandwiched between the first bearing surface and the second bearing surface, the second part of the first connecting part is attached to the first bearing surface and suspended between the first bearing surface and the inclined surface, the third part of the first connecting part is suspended between the bottom of the second groove and the bottom of the first groove, and the fourth part of the first connecting part is attached to the first bearing surface and suspended between the first bearing surface and the bottom of the second groove.

[0033] In an embodiment of the present invention, the resistive heating element further includes two second connecting portions, each of which includes a second embedded section, a third embedded section, and an extension section. The second embedded section is connected to the first connecting portion, the third embedded section is connected between the second embedded section and the extension section, and the extension section is connected to the frame.

[0034] When the second mold and the first mold are closed, the second embedded section is attached to the first bearing surface and suspended between the first bearing surface and the bottom of the second groove, the third embedded section is suspended between the bottom of the first groove and the bottom of the second groove, the extension section is disposed in the second receiving groove, and the frame is disposed in the first receiving groove. In an embodiment of the present invention, the first mold and / or the second mold are provided with an injection channel, which communicates with the first injection groove or the second injection groove.

[0035] The present invention also provides an injection mold for manufacturing heating devices, the injection mold comprising:

[0036] A first mold, comprising a first mold closing plane, wherein the first mold is provided with at least one first injection groove and a first support platform located in the first injection groove, the first injection groove being disposed on the first mold closing plane; the first injection groove comprising a first groove wall and a first groove bottom, the first support platform being fixed to the first groove bottom, and a first annular groove being formed between the first groove wall and the side of the first support platform; the first support platform comprising a first support surface, the first support surface being a plane;

[0037] The second mold includes a second mold closing plane, and the second mold is provided with at least one second injection groove and a second support platform located in the second injection groove. The second injection groove is disposed on the second mold closing plane. The second injection groove includes a second groove wall and a second groove bottom. The second support platform is fixed to the second groove bottom, and a second annular groove is formed between the second groove wall and the side of the second support platform. The second support platform includes a second support surface, which is a plane.

[0038] When the second mold is closed with the first mold, the first groove wall and the second groove wall are spliced ​​together to form the same wall surface. The second bearing surface and the first bearing surface are spaced apart by a preset gap in the vertical direction. The orthographic projection of the second bearing surface covers a part of the first bearing surface. The part of the first bearing surface that is not covered by the orthographic projection of the second bearing surface is set opposite to the bottom of the second groove. The bottom of the first groove is set opposite to the bottom of the second groove.

[0039] In an embodiment of the present invention, two pads are fixed to the bottom of the second groove. The two pads are respectively located on opposite sides of the second support platform. One end of each pad is fixed to the side of the second support platform, and the other end of each pad extends toward the wall of the second groove. The thickness of each pad gradually decreases from the side of the second support platform toward the wall of the second groove. Each pad includes an inclined surface that extends obliquely from the side of the second support platform toward the wall of the second groove. The inclined surface is a plane or an arc surface.

[0040] When the second mold is closed with the first mold, a portion of the inclined surface is positioned opposite to the first bearing surface, and another portion of the inclined surface is positioned opposite to the bottom of the first groove.

[0041] In an embodiment of the present invention, when the second mold and the first mold are closed, a resistive heating element is disposed between the first mold and the second mold. The resistive heating element includes a heating part, which has multiple through holes. A resistive heating wire is located between two adjacent through holes. The heating part includes two oppositely disposed embedded parts. The resistive heating wire is connected between the two embedded parts. The embedded part includes multiple mutually spaced embedded pins. A notch is formed between two adjacent embedded pins. The heating part is sandwiched between the first bearing surface and the second bearing surface. A portion of the embedded part is sandwiched between the first bearing surface and the second bearing surface. Another portion of the embedded part is suspended between the inclined surface and the bottom of the first groove. Yet another portion of the embedded part is suspended between the bottom of the first groove and the bottom of the second groove.

[0042] In an embodiment of the present invention, the first mold closing plane is provided with at least one first receiving groove and at least one second receiving groove, the first receiving groove is arranged around the first injection groove, and the second receiving groove connects the first receiving groove and the first injection groove.

[0043] When the second mold is closed with the first mold, the frame is placed between the first mold and the second mold. The frame is placed in the first receiving groove, and the part of the resistive heating element extending out of the first injection groove is placed in the second receiving groove. The frame and the resistive heating element are integrally formed. The thickness of the frame is equal to the depth of the first receiving groove, and the thickness of the resistive heating element is equal to the depth of the second receiving groove.

[0044] In an embodiment of the present invention, the resistive heating element includes two first connecting portions, two second connecting portions, and a heating portion. The heating portion is connected between the two first connecting portions. Each first connecting portion includes a middle section and two first embedded sections. The middle section is connected between the two first embedded sections. Each of the two second connecting portions includes a second embedded section, a third embedded section, and an extension section. The second embedded section is connected to the first connecting portion. The third embedded section is connected between the second embedded section and the extension section. The extension section is connected to the frame. When the second mold and the first mold are closed, a portion of the middle section is sandwiched between the first bearing surface and the second bearing surface. Another portion of the middle section is attached to the first bearing surface and suspended between the first bearing surface and the inclined surface. Yet another portion of the middle section is suspended between the bottom of the first groove and the bottom of the second groove. And yet another portion of the middle section is attached to the first bearing surface and suspended between the first bearing surface and the bottom of the second groove.

[0045] A portion of the first embedded segment is in contact with the first bearing surface and is suspended between the first bearing surface and the inclined surface, while another portion of the first embedded segment is suspended between the bottom of the first groove and the bottom of the second groove.

[0046] The second embedded section is attached to the first bearing surface and is suspended between the first bearing surface and the bottom of the second groove. The third embedded section is suspended between the bottom of the first groove and the bottom of the second groove. The extension section is located between the second receiving groove and the second mold closing plane.

[0047] In an embodiment of the present invention, the first groove wall is perpendicular to the first mold closing plane, and the second groove wall is perpendicular to the second mold closing plane;

[0048] When the second mold is closed with the first mold, the first mold closing plane and the second mold closing plane are in contact with each other, the height of the first bearing surface is lower than the first mold closing plane, and the second bearing surface and the second mold closing plane are located on the same horizontal plane.

[0049] The present invention also provides a method for manufacturing a heating element, the method of manufacturing the heating element utilizing the above-mentioned injection mold, the method of manufacturing the heating element comprising:

[0050] Place the frame and the resistance heating element on the first mold, and align the resistance heating element with the first injection groove and the first support platform;

[0051] The second mold is closed with the first mold, the first injection groove and the second injection groove are combined to form an injection cavity, and the middle part of the resistance heating element is sandwiched between the first support platform and the second support platform;

[0052] Injection molding liquid into the injection cavity, the injection molding liquid partially covers the resistive heating element, and after curing, the injection molding liquid forms a support, which is combined with the resistive heating element;

[0053] The heating element is formed by demolding.

[0054] The injection mold of this invention can form a support on the resistance heating element through injection molding. The manufacturing process is simple and quick, enabling mass production at high speed, with high production efficiency and low manufacturing cost. Moreover, the heating element made by the injection mold is an integral structure, which facilitates assembly with other structures of the smoke generator and meets the requirements of automated production. Attached Figure Description

[0055] Figure 1 This is a schematic diagram of the disassembled structure of the injection mold of the present invention.

[0056] Figure 2 This is a schematic diagram of the structure of the second mold of the present invention.

[0057] Figure 3 This is a three-dimensional structural diagram of the heating device of the present invention.

[0058] Figure 4 This is a schematic diagram of the frame and resistive heating element of the present invention.

[0059] Figure 5 This is a partially enlarged schematic diagram of the resistive heating element of the present invention.

[0060] Figure 6 This is a schematic diagram of the structure of the heating component of the present invention.

[0061] Figure 7 yes Figure 6 The diagram shows a structural schematic of the heating component from another perspective.

[0062] Figure 8 This is a cross-sectional view of the first mold of the present invention along a first direction.

[0063] Figure 9 This is a cross-sectional view of the first mold of the present invention along the second direction.

[0064] Figure 10 yes Figure 8 The diagram shows an enlarged view of the first mold at point A.

[0065] Figure 11 yes Figure 10The diagram shows a structure in which a frame and a resistance heating element are placed on the first mold.

[0066] Figure 12 yes Figure 8 The diagram shows an enlarged view of the first mold at point B.

[0067] Figure 13 yes Figure 9 The diagram shows an enlarged view of the first mold at point C.

[0068] Figure 14 This is a cross-sectional view of the second mold of the present invention along a certain direction.

[0069] Figure 15 yes Figure 14 The diagram shows an enlarged view of the second mold at point D.

[0070] Figure 16 This is a partial cross-sectional view of the structure of the second mold and the first mold of the present invention when they are joined together.

[0071] Figure 17 and Figure 18 This is a partial cross-sectional view of the structure after the support is formed on the first mold of the present invention.

[0072] Figure 19 and Figure 20 This is a partial cross-sectional view of the structure after the support is formed on the second mold of the present invention. Detailed Implementation

[0073] This invention provides an injection mold.

[0074] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0075] To facilitate understanding by those skilled in the art, the present invention will illustrate the specific implementation process of the technical solution provided by the present invention through the following embodiments.

[0076] Figure 1 This is a schematic diagram of the disassembled structure of the injection mold of the present invention. Figure 2 This is a schematic diagram of the structure of the second mold of the present invention. Figure 3 This is a three-dimensional structural diagram of the heating device of the present invention. Figure 4 This is a schematic diagram of the frame and resistive heating element of the present invention, as shown below. Figure 1, Figure 2 , Figure 3 and Figure 4 As shown, the injection mold 20 of the present invention is used to manufacture a heating device 10. The heating device 10 includes a frame 11, at least one resistive heating element 12, and at least one support 13. The resistive heating element 12 is connected to the frame 11, and the resistive heating element 12 is at least partially embedded in the support 13 by injection molding. The injection mold 20 includes:

[0077] A first mold 21 is provided with at least one first injection groove 201 and a first support platform 211 located in the first injection groove 201;

[0078] The second mold 22 is provided with at least one second injection groove 301 and a second support platform 221 located in the second injection groove 301;

[0079] When the second mold 22 is closed with the first mold 21, the first injection groove 201 and the second injection groove 301 combine to form the injection cavity of the support 13. The vertical gap between the first support platform 211 and the second support platform 221 is equal to the thickness of the resistance heating element 12. In this embodiment, the component that combines the resistance heating element 12 with the support 13 is named the heating component 10.

[0080] When using injection mold 20 to manufacture heating device 10, firstly, frame 11 and resistive heating element 12 are placed on first mold 21, and resistive heating element 12 is positioned corresponding to first injection groove 201 and first support platform 211; then, second mold 22 is closed with first mold 21, so that first injection groove 201 and second injection groove 301 are combined to form injection cavity for forming support 13. At this time, the middle part of resistive heating element 12 is fixed between first support platform 211 and second support platform 221; then, injection liquid is injected into injection cavity, and injection liquid partially covers resistive heating element 12. The solidified injection liquid forms support 13, and support 13 and resistive heating element 12 are combined to form heating component 10; finally, the molded heating device 10 is demolded and taken out.

[0081] The injection mold 20 of this invention can form a support 13 on the resistive heating element 12 through injection molding. The manufacturing process is simple and quick, enabling mass production, high efficiency, and low manufacturing cost. Furthermore, the heating element 10 manufactured by the injection mold 20 is an integral structure, facilitating assembly with other structures in the atomizer and meeting the requirements of automated production. The heating element 10 injection-molded by the injection mold 20 of this invention does not require cumbersome post-processing like ceramics, effectively improving production efficiency and product stability, and ensuring the consistency of the atomizing components' quality.

[0082] Optionally, such as Figure 3As shown, the frame 11 is a rectangular frame, and two resistive heating elements 12 are connected inside the frame 11. Each resistive heating element 12 has a support 13 formed on it. The number of resistive heating elements 12 can be freely designed according to actual needs. For example, 4, 6, 8, or 10 resistive heating elements 12 can be connected inside the frame 11, but it is not limited to this. In this embodiment, the frame 11 includes four connecting plates 111, which form a rectangle. The two ends of each connecting plate 111 are fixedly connected to the two adjacent connecting plates 111, and the resistive heating elements 12 are connected between the two opposite connecting plates 111.

[0083] Optionally, the frame 11 and the resistive heating element 12 are sheet-shaped, and are integrally formed from a single metal sheet. The heating element 123 can be formed by machine cutting, laser etching, or corrosion. In this embodiment, the resistive heating element 12 includes a first surface 124 and a second surface 125 arranged parallel to each other. Both the first surface 124 and the second surface 125 are planar, wherein the first surface 124 is the upper surface of the resistive heating element 12, and the second surface 125 is the lower surface of the resistive heating element 12.

[0084] Optionally, such as Figure 3 and Figure 4 As shown, the resistive heating element 12 includes two first connecting portions 121, two second connecting portions 122, and a heating element 123 that heats up when energized. The heating element 123 is connected between the two first connecting portions 121, that is, one edge of the heating element 123 is connected to one first connecting portion 121, and the opposite edge of the heating element 123 is connected to the other first connecting portion 121. The two second connecting portions 122 are respectively connected to the two first connecting portions 121, and the ends of the two second connecting portions 122 away from the first connecting portions 121 are connected to the frame 11. When the resistive heating element 12 is energized, all two first connecting portions 121, two second connecting portions 122, and the heating element 123 heat up, or all two first connecting portions 121 and the heating element 123 heat up, or only the heating element 123 heats up.

[0085] Optionally, Figure 5 This is a partially enlarged schematic diagram of the resistive heating element of the present invention, as shown below. Figure 5 As shown, the first connecting portion 121 includes a middle section 1211 and two first embedded sections 1212, with the middle section 1211 connected between the two first embedded sections 1212; each of the two second connecting portions 122 includes a second embedded section 1221, a third embedded section 1222 and an extension section 1223, with the second embedded section 1221 connected to the first connecting portion 121, the third embedded section 1222 connected between the second embedded section 1221 and the extension section 1223, and the extension section 1223 connected to the frame 11.

[0086] Optionally, such as Figure 5As shown, the heating element 123 has multiple through holes 102, with a resistance heating wire 1231 between adjacent through holes 102. The heating element 123 includes two oppositely arranged embedded portions 1232, with the resistance heating wire 1231 connected between the two embedded portions 1232. Each embedded portion 1232 includes multiple spaced-apart embedded pins 1233, with notches 105 formed between adjacent embedded pins 1233 and between the first connecting portion 121 and adjacent embedded pins 1233. Each embedded pin 1233 includes a suspended section 1234, a fourth embedded section 1235, and a fifth embedded section 1236. The suspended section 1234 is connected between the resistance heating wire 1231 and the fourth embedded section 1235, and the fifth embedded section 1236 is connected to the fourth embedded section 1235. When the heating element 123 is energized, both the resistance heating wire 1231 and the embedded portions 1232 heat up, or only the resistance heating wire 1231 heats up.

[0087] In another preferred embodiment, the heating element 123 includes a plurality of heating brackets connected side by side. A through hole 102 is formed between two adjacent heating brackets. Each heating bracket has an embedded pin 1233 at its opposite ends. A notch 105 is formed between two adjacent embedded pins 1233 and between the first connecting portion 121 and the adjacent embedded pin 1233. The embedded pin 1233 includes a suspended section 1234, a fourth embedded section 1235, and a fifth embedded section 1236. The suspended section 1234 is located inside the heating bracket, the fifth embedded section 1236 is located outside the heating bracket, and the fourth embedded section 1235 connects the suspended section 1234 and the fifth embedded section 1236. When the heating element 123 is energized, the heating bracket heats up.

[0088] Optionally, Figure 6 This is a schematic diagram of the structure of the heating component of the present invention. Figure 7 yes Figure 6 The schematic diagram of the heating component from another perspective is shown below. Figure 5 , Figure 6 and Figure 7 As shown, the bracket 13 includes a base plate 132 and sidewalls 131 extending upward from the periphery of the base plate 132. A receiving cavity 103 is formed between the base plate 132 and the sidewalls 131. An atomizing groove 104 is provided through the base plate 132 and communicates with the receiving cavity 103.

[0089] Optionally, such as Figure 5 , Figure 6 and Figure 7As shown, after the injection mold forms the support 13 on the resistance heating element 12, the resistance heating wire 1231 of the heating part 123 and the suspended section 1234 of the embedded pin 1233 are correspondingly arranged with the atomizing groove 104; the lower surface of the fourth embedded section 1235 of the embedded pin 1233 is embedded in the base plate 132, and the upper surface of the fourth embedded section 1235 is exposed in the receiving cavity 103; the fifth embedded section 1235 of the embedded pin 1233 is embedded at the connection between the base plate 132 and the side wall 131; the lower surface of the middle section 1211 of the two first connecting parts 121 is embedded in the base plate 132, and the two first connecting parts 121 are embedded in the base plate 132. The upper surface of the middle section 1211 of the connector 121 is exposed in the receiving cavity 103. The first embedded section 1212 of the two first connectors 121 is embedded in the connection between the base plate 132 and the side wall 131. The lower surface of the second embedded section 1221 of the two second connectors 122 is embedded in the base plate 132. The upper surface of the second embedded section 1221 of the two second connectors 122 is exposed in the receiving cavity 103. The third embedded section 1222 of the two second connectors 122 is embedded in the connection between the base plate 132 and the side wall 131. The extension section 1223 of the two second connectors 122 is provided outside the bracket 13.

[0090] Optionally, such as Figure 1 As shown, the first mold 21 includes a first mold-closing plane 212, and a first injection groove 201 is disposed on the first mold-closing plane 212. The second mold 22 includes a second mold-closing plane 222, and a second injection groove 301 is disposed on the second mold-closing plane 222. When the second mold 22 and the first mold 21 are closed, the first mold-closing plane 212 and the second mold-closing plane 222 are in contact with each other. In this embodiment, the first injection groove 201 is located in the middle of the first mold-closing plane 212, and the first injection groove 201 is formed by a partial recess in the first mold-closing plane 212; the second injection groove 301 is located in the middle of the second mold-closing plane 222, and the second injection groove 301 is formed by a partial recess in the second mold-closing plane 222.

[0091] Optionally, the first mold-closing plane 212 is provided with four first injection grooves 201, and each of the four first injection grooves 201 is provided with a first support platform 211. Two first injection grooves 201 form one group, and the other two first injection grooves 201 form another group. That is, two frames 11 can be placed on the first mold 21, and two resistive heating elements 12 are connected to each frame 11. Four heating devices 10 can be formed in one injection. In this embodiment, the number of first injection grooves 201 matches the number of resistive heating elements 12. The specific number can be freely designed according to actual needs.

[0092] Optionally, Figure 8 This is a cross-sectional view of the first mold of the present invention along a first direction. Figure 9 This is a cross-sectional view of the first mold of the present invention along the second direction. Figure 10 yes Figure 8 The diagram shown is an enlarged view of the first mold at point A. Figure 11 yes Figure 10 The schematic diagram shown below illustrates the structure of the first mold on which the frame and resistive heating element are placed. Please refer to the diagram. Figures 1 to 11 The first mold closing plane 212 is provided with at least one first receiving groove 2021 and at least one second receiving groove 2022. The first receiving groove 2021 is a rectangular groove and is arranged around the first injection groove 201. The second receiving groove 2022 connects the first receiving groove 2021 and the first injection groove 201. The first receiving groove 2021 is used to accommodate the frame 11, and the second receiving groove 2022 is used to accommodate the part of the resistive heating element 12 that extends out of the first injection groove 201. Before the second mold 22 and the first mold 21 are closed, the frame 11 is placed in the first receiving groove 2021, and the resistive heating element 12 is arranged corresponding to the first injection groove 201 and the first support platform 211. The part of the resistive heating element 12 that extends out of the first injection groove 201 is arranged in the second receiving groove 2022.

[0093] like Figure 10 and Figure 11 As shown, when the frame 11 and the resistance heating element 12 are placed on the first mold 21, the two first connecting parts 121, the second embedded sections 1221 of the two second connecting parts 122, and the resistance heating wire 1231, the suspended section 1234, and the fourth embedded section 1235 of the heating element 123 are all set on the first support platform 211. The two opposite ends of the two first connecting parts 121, the third embedded sections 1222 of the two second connecting parts 122, and the fifth embedded section 1235 of the heating element 123 are all located above the first injection molding groove 201. The extension sections 1223 of the two second connecting parts 122 are set in the second receiving groove 2022.

[0094] Optionally, the thickness of the frame 11 is equal to the thickness of the resistance heating element 12, the thickness of the frame 11 is equal to the depth of the first receiving groove 2021, and the thickness of the resistance heating element 12 is equal to the depth of the second receiving groove 2022. This can prevent the frame 11 and the resistance heating element 12 from interfering with the second mold 22 when the second mold 22 and the first mold 21 are closed.

[0095] Optionally, such as Figure 1 As shown, the first mold 21 is provided with multiple fixing posts 213, the ends of each fixing post 213 are fixed in the first receiving groove 2021, the frame 11 is provided with multiple through holes 101 that cooperate with each fixing post 213, and the second mold closing plane 222 is provided with multiple fixing holes 302. When the second mold 22 and the first mold 21 are closed, each fixing post 213 is inserted into the fixing hole 302 respectively. In this embodiment, the first receiving groove 2021 is provided with four fixing posts 213, and the four fixing posts 213 are arranged in a matrix.

[0096] Optionally, the first mold closing plane 212 is fixed with a plurality of positioning blocks 214, and the second mold closing plane 222 is provided with a plurality of positioning grooves 303. When the second mold 22 and the first mold 21 are closed, each positioning block 214 is inserted into each positioning groove 303. In this embodiment, the first mold closing plane 212 is provided with four positioning blocks 214, which are respectively located at the four corners of the first mold closing plane 212; the second mold closing plane 222 is provided with four positioning grooves 303.

[0097] Optionally, such as Figure 1 , Figure 8 and Figure 9 As shown, the first mold 21 is provided with multiple demolding holes 203, and the injection mold 20 also includes multiple demolding pins 23 that cooperate with each demolding hole 203. The multiple demolding pins 23 can pass through the multiple demolding holes 203 to push the molded heating device 10 away from the first mold 21; as shown Figure 8 In this embodiment, no demolding pins 23 are installed in the demolding holes 203. Multiple demolding holes 203 penetrate the bottom surface of the first mold 21 and the first mold closing plane 212. Four demolding holes 203 are connected to the first receiving groove 2021; two demolding holes 203 are connected to a first injection molding groove 201. When two demolding pins 23 are placed in these two demolding holes 203, the end faces of the demolding pins 23 are on the same horizontal plane as the first mold closing plane 212, and the two demolding pins 23 are located on the side of the first injection molding groove 201, serving as the groove wall of the first injection molding groove 201.

[0098] Optionally, Figure 12 yes Figure 8 The diagram shown is an enlarged view of the first mold at point B. Figure 13 yes Figure 9 The enlarged structural diagram of the first mold at point C is shown below. Figure 12 and Figure 13 As shown, the first injection molding groove 201 includes a first groove wall 2011 and a first groove bottom 2012. A first support platform 211 is fixed to the first groove bottom 2012. A first annular groove is formed between the first groove wall 2011 and the side of the first support platform 211. The first annular groove is used to injection mold the side wall 131 of the bracket 13, and the first support platform 211 is used to form the receiving cavity 103 of the bracket 13. In this embodiment, the first groove wall 2011 and the first groove bottom 2012 are vertically connected.

[0099] Optionally, Figure 14 This is a cross-sectional view of the second mold of the present invention along the first direction. Figure 15 yes Figure 14 The enlarged structural diagram of the second mold at point D is shown below. Figure 14 and Figure 15As shown, the second injection molding groove 301 includes a second groove wall 3011 and a second groove bottom 3012. A second support platform 221 is fixed to the second groove bottom 3012. A second annular groove is formed between the side of the second groove wall 3011 and the side of the second support platform 221. The second annular groove is used to injection mold the base plate 132 of the bracket 13, and the second support platform 221 is used to form the atomizing groove 104 of the bracket 13. In this embodiment, the second groove wall 3011 is connected to the second groove bottom 3012 through an arc surface, and the second groove wall 3011 is perpendicular to the second groove bottom 3012.

[0100] Optionally, such as Figure 13 and Figure 15 As shown, the first support platform 211 includes a first support surface 2111, and the second support platform 221 includes a second support surface 2211. Both the first support surface 2111 and the second support surface 2211 are planes. The height of the first support surface 2111 is lower than the first mold closing plane 212, and the second support surface 2211 and the second mold closing plane 222 are located on the same horizontal plane.

[0101] After the injection mold forms the support 13, the upper surface of the resistive heating element 12 and the upper surface of the base plate 132 are on the same horizontal plane, and the upper surface of the resistive heating element 12 and the upper surface of the base plate 132 are parallel to the first bearing surface 2111. In this embodiment, when the heating part 123 of the resistive heating element 12 is disposed on the first bearing surface 2111, the upper surface of the heating part 123 is in contact with the first bearing surface 2111, and the lower surface of the heating part 123 is on the same horizontal plane as the first mold closing plane 212.

[0102] Optionally, the area of ​​the first bearing surface 2111 is larger than the area of ​​the second bearing surface 2211. When the second mold 22 and the first mold 21 are closed, the second bearing platform 221 is positioned directly opposite the first bearing platform 211, and the orthographic projection of the second bearing surface 2211 onto the first bearing surface 2111 is located in the middle region of the first bearing surface 2111.

[0103] Optionally, such as Figure 14 and Figure 15As shown, two pads 223 are fixed to the bottom of the second tank 3012. The two pads 223 are located on opposite sides of the second support platform 221. One end of the pad 223 is fixed to the side of the second support platform 221, and the other end of the pad 223 extends towards the second tank wall 3011. The thickness of the pad 223 gradually decreases from the side of the second support platform 221 towards the second tank wall 3011. Since the thickness of the pad 223 is greatest at the connection between it and the second support platform 221, the distance between the pad 223 and the first support surface 2111 is smallest at this point. Because the injection molding liquid has a certain fluid viscosity, it will stop flowing when it flows into a narrow space, and no burrs of the injection molding material will be formed at the gap 105 of the suspended section 1234. This avoids secondary processing (removing burrs), which helps to improve production efficiency and reduce production costs.

[0104] Optionally, the pad 223 includes an inclined surface 2231 extending obliquely from the side of the second support platform 221 to the second groove wall 3011. The inclined surface 2231 is a plane or an arc surface. Optionally, the minimum vertical distance between the second support surface 2211 and the inclined surface 2231 is 0.1mm to 2mm, preferably 0.2mm, 0.3mm, 0.4mm, 0.5mm, or 0.6mm. This distance is determined by the fluid viscosity of the injection molding liquid; a higher fluid viscosity results in a smaller distance, and a lower fluid viscosity results in a larger distance.

[0105] Optionally, the first mold 21 and / or the second mold 22 are provided with an injection channel 304, which is connected to the first injection groove 201 or the second injection groove 301.

[0106] Optionally, Figure 16 This is a partial cross-sectional view of the structure of the second mold and the first mold when they are joined together. Figure 17 and Figure 18 This is a partial cross-sectional view of the structure after the support is formed on the first mold of the present invention. Figure 19 and Figure 20 This is a partial cross-sectional view of the structure after the support is formed on the second mold of the present invention. Please refer to the diagram. Figures 16 to 20When the second mold 22 and the first mold 21 are closed, the upper surface of the middle section 1211 of the two first connecting parts 121 contacts the first bearing surface 2111 of the first bearing platform 211, the lower surface of the two first connecting parts 121 is opposite to the second bottom 3012 of the second injection molding groove 301, and the opposite ends of the two first connecting parts 121 extend out of the first bearing platform 211 and are located above the first injection molding groove 201; the upper surface of the second embedding section 1221 of the two second connecting parts 22 is... The first bearing surface 2111 of the support platform 211 is in contact with the second bearing surface 2111 of the support platform 211; the lower surface of the second embedding section 1221 of the two second connecting parts 122 is opposite to the second bottom 3012 of the second injection molding groove 301; the upper surface of the third embedding section 1222 of the two second connecting parts 122 is opposite to the first bottom 2012 of the first injection molding groove 201; the lower surface of the third embedding section 1222 of the two second connecting parts 122 is opposite to the second bottom 3012 of the second injection molding groove 301; the heating part 123 The upper surface of the resistive heating wire 1231 contacts the first bearing surface 2111 of the first bearing platform 211, and the lower surface of the resistive heating wire 1231 of the heating part 123 contacts the second bearing surface 2211 of the second bearing platform 221. The upper surfaces of the suspended section 1234 and the fourth embedded section 1235 of the embedded pin 1233 contact the first bearing surface 2111 of the first bearing platform 211, and the lower surface of the suspended section 1234 of the embedded pin 1233 contacts the second bearing surface 2211 of the second bearing platform 221. The lower surface of the fourth embedded segment 1235 of the embedded pin 1233 is positioned opposite to the inclined surface 2231 of the pad 223; the upper surface of the fifth embedded segment 1236 of the embedded pin 1233 is positioned opposite to the first bottom 2012 of the first injection molding groove 201, and the lower surface of the fifth embedded segment 1236 of the embedded pin 1233 is positioned opposite to the inclined surface 2231 of the pad 223, that is, the fourth embedded segment 1235 and the fifth embedded segment 1236 of the embedded pin 1233 are located above the pad 223.

[0107] After the injection mold forms the support 13, the resistance heating wire 1231 of the heating part 123 and the suspended section 1234 of the embedded pin 1233 are correspondingly arranged with the atomizing groove 104; the lower surface of the fourth embedded section 1235 of the embedded pin 1233 is embedded in the base plate 132, and the upper surface of the fourth embedded section 1235 is exposed in the receiving cavity 103; the fifth embedded section 1235 of the embedded pin 1233 is embedded at the connection between the base plate 132 and the side wall 131; the lower surface of the middle section 1211 of the two first connecting parts 121 is embedded in the base plate 132, and the two first connecting parts 121... The upper surface of the middle section 1211 is exposed in the receiving cavity 103. The first embedded sections 1212 of the two first connecting parts 121 are embedded in the connection between the base plate 132 and the side wall 131. The lower surfaces of the second embedded sections 1221 of the two second connecting parts 122 are embedded in the base plate 132, and the upper surfaces of the second embedded sections 1221 of the two second connecting parts 122 are exposed in the receiving cavity 103. The third embedded sections 1222 of the two second connecting parts 122 are embedded in the connection between the base plate 132 and the side wall 131, and the extension sections 1223 of the two second connecting parts 122 are provided outside the bracket 13. Due to the action of the pad 223, the second injection molding groove 301 forms an inclined portion 1321 of the base plate 132 at the pad 223. The thickness of the inclined portion 1321 gradually decreases from the second groove wall 3011 toward the direction close to the second support platform 221.

[0108] In another preferred embodiment, the second support platform 221 includes two symmetrically arranged inclined surfaces 2231, which are located between the second groove bottom 3012 and the second support surface 2211. Each inclined surface 2231 is inclined along the second support platform 221 toward the second groove wall 3011. The heating part 123 of the resistive heating element 12 is provided with a plurality of through holes 102. A resistive heating wire 1231 is located between two adjacent through holes 102. The heating part 123 includes two oppositely arranged embedded parts 1232. The resistive heating wire 1231 is connected between the two embedded parts 1232. The embedded part 1232 includes a plurality of mutually spaced embedded pins 1233. A notch 105 is formed between two adjacent embedded pins 1233.

[0109] When the second mold 22 and the first mold 21 are closed, the heating element 123 is sandwiched between the first bearing surface 2111 and the second bearing surface 2211, the first part of the embedded pin 1233 is sandwiched between the first bearing surface 2111 and the second bearing surface 2211, and the second part of the embedded pin 1233 is suspended between the inclined surface 2231 of the second bearing platform 221 and the bottom of the first groove 2012.

[0110] Optionally, the third portion of the embedded pin 1233 is suspended between the second slot bottom 3012 and the first slot bottom 2012.

[0111] Optionally, the resistive heating element 12 includes two first connecting parts 121 and a heating part 123, with the heating part 123 connected between the two first connecting parts 121;

[0112] When the second mold 22 and the first mold 21 are closed, the first part of the first connecting part 121 is sandwiched between the first bearing surface 2111 and the second bearing surface 2211, the second part of the first connecting part 121 is attached to the first bearing surface 2111 and suspended between the first bearing surface 2111 and the inclined surface 2231, the third part of the first connecting part 121 is suspended between the second groove bottom 3012 and the first groove bottom 2012, and the fourth part of the first connecting part 121 is attached to the first bearing surface 2111 and suspended between the first bearing surface 2111 and the second groove bottom 3012.

[0113] Optionally, the resistive heating element 12 further includes two second connecting portions 122. Each of the two second connecting portions 122 includes a second embedding section 1221, a third embedding section 1222, and an extension section 1223. The second embedding section 1221 is connected to the first connecting portion 121, the third embedding section 1222 is connected between the second embedding section 1221 and the extension section 1223, and the extension section 1223 is connected to the frame 11.

[0114] When the second mold 22 and the first mold 21 are closed, the second embedded section 1221 is attached to the first bearing surface 2111 and suspended between the first bearing surface 2111 and the second groove bottom 3012, the third embedded section 1222 is suspended between the first groove bottom 2012 and the second groove bottom 3012, the extension section 1223 is disposed in the second receiving groove 2022, and the frame 11 is disposed in the first receiving groove 2021.

[0115] Please refer to Figures 1 to 20 In this invention, the injection mold 20 does not include a frame 11 and a resistance heating element 12. When the second mold 22 is closed with the first mold 21, the first groove wall 2011 and the second groove wall 3011 are joined to form the same wall surface. The second bearing surface 2211 and the first bearing surface 2111 are spaced apart by a predetermined gap in the vertical direction. The orthographic projection of the second bearing surface 2211 covers a portion of the first bearing surface 2111. The portion of the first bearing surface 2111 not covered by the orthographic projection of the second bearing surface 2211 is positioned opposite to the second groove bottom 3012. The first groove bottom 2012 and the second groove bottom 3012 are positioned opposite to each other. The structure of the injection mold 20 is described above and will not be repeated here.

[0116] Optionally, when the frame 11 and the resistance heating element 12 are not provided in the injection mold 20, and the second mold 22 is closed with the first mold 21, a part of the inclined surface 2231 is arranged opposite to the first bearing surface 2111, and the other part of the inclined surface 2231 is arranged opposite to the first groove bottom 2012.

[0117] Optionally, the first groove wall 2011 is perpendicular to the first mold closing plane 212; the second groove wall 3011 is perpendicular to the second mold closing plane 222;

[0118] When the frame 11 and the resistance heating element 12 are not provided in the injection mold 20, and the second mold 22 is closed with the first mold 21, the first mold closing plane 212 and the second mold closing plane 222 are in contact with each other, the height of the first bearing surface 2111 is lower than the first mold closing plane 212, and the second bearing surface 2211 and the second mold closing plane 222 are located on the same horizontal plane.

[0119] The present invention also provides a method for manufacturing a heating element, the method utilizing the injection mold 20 described above, the method comprising:

[0120] Place the frame 11 and the resistance heating element 12 on the first mold 21, and arrange the resistance heating element 12 in correspondence with the first injection groove 201 and the first support platform 211;

[0121] The second mold 22 is closed with the first mold 21, the first injection groove 201 and the second injection groove 301 are combined to form an injection cavity, and the middle part of the resistance heating element 12 is sandwiched between the first support platform 211 and the second support platform 221.

[0122] Injection liquid into injection cavity, the injection liquid partially covers resistance heating element 12, the cured injection liquid forms support 13, support 13 and resistance heating element 12 combine to form heating component 10;

[0123] Demolding forms the heating element 10.

[0124] The method for manufacturing the heating element of the present invention enables the formation of a support 13 on the resistive heating element 12 through injection molding. The manufacturing process is simple and quick, allowing for rapid mass production with high efficiency and low manufacturing cost. Furthermore, the heating element 10 manufactured by this method is an integral structure, facilitating assembly with other structures in the smoke generator and meeting the requirements of automated production.

[0125] Optionally, after the injection molding liquid fills the first injection tank 201 and the second injection tank 301, a sidewall 131 of the support 13 is formed in the first annular groove, a bottom plate 132 of the support 13 is formed in the second annular groove, a receiving cavity 103 of the support 13 is formed at the first support platform 211, and an atomizing groove 104 of the support 13 is formed at the second support platform 221. The atomizing groove 104 penetrates the bottom plate 132. The upper surface of the resistance heating element 12 is located in the receiving cavity 103, and the upper surface of the resistance heating element 12 and the upper surface of the bottom plate 132 are on the same horizontal plane. The second surface 125 of the resistance heating element 12 is located in the atomizing groove 104.

[0126] Optionally, after the injection molding liquid fills the first injection tank 201 and the second injection tank 301, the second injection tank 301 forms an inclined portion 1321 of the bottom plate 132 at the pad 223. The thickness of the inclined portion 1321 gradually decreases from the second tank wall 301 toward the second support platform 221. Since the thickness is greatest at the connection between the pad 223 and the second support platform 221, the distance between the pad 223 and the first support surface 2111 is smallest at this point. Because the injection molding liquid has a certain fluid viscosity, it will stop flowing when it reaches a narrow space. That is, the injection molding liquid will not completely fill the gap 105, and no rough edges of the injection molding material will be formed at the edge of the heating part 123, avoiding secondary processing, which is beneficial to improving production efficiency and reducing production costs.

[0127] After the injection mold forms the support 13, the resistance heating wire 1231 of the heating part 123 and the suspended section 1234 of the embedded pin 1233 are correspondingly arranged with the atomizing groove 104; the lower surface of the fourth embedded section 1235 of the embedded pin 1233 is embedded in the base plate 132, and the upper surface of the fourth embedded section 1235 is exposed in the receiving cavity 103; the fifth embedded section 1235 of the embedded pin 1233 is embedded at the connection between the base plate 132 and the side wall 131; the lower surface of the middle section 1211 of the two first connecting parts 121 is embedded in the base plate 132, and the two first connecting parts 121... The upper surface of the middle section 1211 is exposed in the receiving cavity 103. The first embedded sections 1212 of the two first connecting parts 121 are embedded in the connection between the base plate 132 and the side wall 131. The lower surfaces of the second embedded sections 1221 of the two second connecting parts 122 are embedded in the base plate 132, and the upper surfaces of the second embedded sections 1221 of the two second connecting parts 122 are exposed in the receiving cavity 103. The third embedded sections 1222 of the two second connecting parts 122 are embedded in the connection between the base plate 132 and the side wall 131, and the extension sections 1223 of the two second connecting parts 122 are provided outside the bracket 13. Due to the action of the pad 223, the second injection molding groove 301 forms an inclined portion 1321 of the base plate 132 at the pad 223. The thickness of the inclined portion 1321 gradually decreases from the second groove wall 301 toward the direction close to the second support platform 221.

[0128] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, and these simple modifications all fall within the protection scope of the present invention. The various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not further describe the various possible combinations.

Claims

1. An injection mold for manufacturing a heating element, the heating element comprising a frame, at least one resistive heating element, and at least one support, the resistive heating element being connected to the frame, and the resistive heating element being at least partially embedded in the support by injection molding, characterized in that, The injection mold includes: A first mold, wherein the first mold is provided with at least one first injection groove and a first support platform located in the first injection groove; The second mold is provided with at least one second injection groove and a second support platform located in the second injection groove; When the second mold is closed with the first mold, the first injection groove and the second injection groove are combined to form an injection cavity for injection molding the bracket, and the gap between the first support platform and the second support platform in the vertical direction is equal to the thickness of the resistance heating element. The second injection molding tank includes a second tank wall and a second tank bottom. The second support platform is fixed to the second tank bottom. A second annular groove is formed between the second tank wall and the side of the second support platform. Two pads are fixed to the second tank bottom. The two pads are located on opposite sides of the second support platform. One end of the pad is fixed to the side of the second support platform, and the other end of the pad extends towards the second tank wall. The thickness of the pad gradually decreases from the side of the second support platform towards the second tank wall. The support includes a base plate and sidewalls extending upward from the periphery of the base plate, forming a receiving cavity between the base plate and the sidewalls. An atomizing groove is provided through the base plate. A first support platform is used to form the receiving cavity, and a second support platform is used to form the atomizing groove. The first support platform includes a first support surface, and the second support platform includes a second support surface. Both the first support surface and the second support surface are planar. After the support is formed by injection molding, the second injection groove forms an inclined portion of the base plate at the pad. The thickness of the inclined portion gradually decreases from the second groove wall towards the second support platform.

2. The injection mold as described in claim 1, characterized in that, The first mold includes a first mold closing plane, and the first injection groove is disposed on the first mold closing plane. The second mold includes a second mold closing plane, and the second injection groove is disposed on the second mold closing plane. When the second mold and the first mold are closed, the first mold closing plane and the second mold closing plane are in contact with each other.

3. The injection mold as described in claim 2, characterized in that, The first mold closing plane is provided with at least one first receiving groove and at least one second receiving groove. The first receiving groove is arranged around the first injection molding groove, and the second receiving groove connects the first receiving groove and the first injection molding groove. The first receiving groove is used to receive the frame, and the second receiving groove is used to receive the part of the resistive heating element that extends out of the first injection molding groove.

4. The injection mold as described in claim 3, characterized in that, The frame and the resistive heating element are sheet-shaped, the thickness of the frame is equal to the depth of the first receiving groove, and the thickness of the resistive heating element is equal to the depth of the second receiving groove.

5. The injection mold as described in any one of claims 3 to 4, characterized in that, The first injection molding tank includes a first tank wall and a first tank bottom. The first support platform is fixed to the first tank bottom. A first annular groove is formed between the first tank wall and the side of the first support platform. The first annular groove is used for injection molding to form the side wall. The second annular groove is used for injection molding to form the base plate.

6. The injection mold as described in claim 5, characterized in that, The height of the first bearing surface is lower than that of the first mold closing plane, and the second bearing surface and the second mold closing plane are located on the same horizontal plane; After the injection mold forms the bracket, the upper surface of the resistive heating element and the upper surface of the base plate are on the same horizontal plane.

7. The injection mold as described in claim 6, characterized in that, The resistive heating element includes two first connecting parts, two second connecting parts, and a heating part. The heating part is connected between the two first connecting parts. Each first connecting part includes a middle section and two first embedded sections. The middle section is connected between the two first embedded sections. Each of the two second connecting parts includes a second embedded section, a third embedded section, and an extension section. The second embedded section is connected to the first connecting part. The third embedded section is connected between the second embedded section and the extension section. The extension section is connected to the frame. After the injection mold forms the bracket, the heating element spans the atomizing groove, the lower surfaces of the two intermediate sections are embedded in the base plate, the upper surfaces of the two intermediate sections are exposed in the receiving cavity, the two first embedded sections are embedded at the connection between the base plate and the side wall, the lower surface of the second embedded section is embedded in the base plate, the upper surface of the second embedded section is exposed in the receiving cavity, the third embedded section is embedded at the connection between the base plate and the side wall, and the extension section is disposed outside the bracket.

8. The injection mold as described in claim 7, characterized in that, The heating element has multiple through holes, and a resistance heating wire is between two adjacent through holes. The heating element includes two oppositely arranged embedded parts, and the resistance heating wire is connected between the two embedded parts. Each embedded part includes multiple embedded pins arranged at intervals. A notch is formed between two adjacent embedded pins and between the first connecting part and the adjacent embedded pin. Each embedded pin includes a suspended section, a fourth embedded section and a fifth embedded section. The suspended section is connected between the resistance heating wire and the fourth embedded section, and the fifth embedded section is connected to the fourth embedded section. After the injection mold forms the bracket, the resistance heating wire and the suspended section are arranged corresponding to the atomizing groove. The lower surface of the fourth embedded section is embedded in the base plate, the upper surface of the fourth embedded section is exposed in the receiving cavity, and the fifth embedded section is embedded at the connection between the base plate and the side wall.

9. The injection mold as described in claim 8, characterized in that, When the second mold is closed with the first mold, the lower surface of the resistive heating wire and the suspended section is in contact with the second bearing surface, and the fourth and fifth embedded sections are located above the pad block.

10. The injection mold as described in claim 9, characterized in that, The pad includes an inclined surface extending from the side of the second support platform toward the wall of the second groove, the inclined surface being either a plane or an arc surface.

11. The injection mold as described in claim 10, characterized in that, The minimum vertical distance between the second bearing surface and the inclined surface is 0.1mm to 2mm.

12. The injection mold as described in claim 7, characterized in that, The heating element includes multiple heating brackets connected side by side. Each heating bracket has embedded pins at its opposite ends. A notch is formed between two adjacent embedded pins and between the first connecting part and the adjacent embedded pin. The embedded pin includes a suspended section, a fourth embedded section and a fifth embedded section. The suspended section is located inside the heating bracket, and the fourth embedded section is connected between the suspended section and the fifth embedded section. After the injection mold forms the bracket, the middle part of each heating bracket and the suspended section are arranged corresponding to the atomizing groove. The lower surface of the fourth embedded section is embedded in the base plate, the upper surface of the fourth embedded section is exposed in the receiving cavity, and the fifth embedded section is embedded at the connection between the base plate and the side wall.

13. The injection mold as described in claim 6, characterized in that, The second support platform includes two symmetrically arranged inclined surfaces, which are located between the bottom of the second groove and the second support surface. Each inclined surface is inclined along the direction of the second support platform toward the second groove wall. The heating part of the resistive heating element is provided with multiple through holes, and a resistive heating wire is between two adjacent through holes. The heating part includes two oppositely arranged embedded parts, and the resistive heating wire is connected between the two embedded parts. The embedded part includes multiple embedded pins arranged at intervals, and a notch is formed between two adjacent embedded pins. When the second mold and the first mold are closed, the heating element is sandwiched between the first bearing surface and the second bearing surface, the first part of the embedded pin is sandwiched between the first bearing surface and the second bearing surface, and the second part of the embedded pin is suspended between the inclined surface of the second bearing platform and the bottom of the first groove.

14. The injection mold as described in claim 13, characterized in that, The third portion of the embedded pin is suspended between the bottom of the second slot and the bottom of the first slot.

15. The injection mold as described in claim 13, characterized in that, The resistive heating element includes two first connecting parts and a heating part, wherein the heating part is connected between the two first connecting parts; When the second mold and the first mold are closed, the upper surface of the first part of the first connecting part contacts the first bearing surface, the lower surface of the first connecting part is opposite to the bottom of the second groove, and the opposite ends of the first connecting part extend out of the first bearing platform and are located above the first injection groove.

16. The injection mold as described in claim 15, characterized in that, The resistive heating element further includes two second connecting portions, each of which includes a second embedded section, a third embedded section, and an extension section. The second embedded section is connected to the first connecting portion, the third embedded section is connected between the second embedded section and the extension section, and the extension section is connected to the frame. When the second mold and the first mold are closed, the second embedded section is attached to the first bearing surface and is suspended between the first bearing surface and the bottom of the second groove. The third embedded section is suspended between the bottom of the first groove and the bottom of the second groove. The extension section is disposed in the second receiving groove, and the frame is disposed in the first receiving groove.

17. An injection mold for manufacturing a heating element, the heating element comprising a frame, at least one resistive heating element, and at least one support, the resistive heating element being connected to the frame, the resistive heating element being at least partially embedded in the support by injection molding, characterized in that, The injection mold includes: A first mold, comprising a first mold closing plane, wherein the first mold is provided with at least one first injection groove and a first support platform located in the first injection groove, the first injection groove being disposed on the first mold closing plane; the first injection groove comprising a first groove wall and a first groove bottom, the first support platform being fixed to the first groove bottom, and a first annular groove being formed between the first groove wall and the side of the first support platform; the first support platform comprising a first support surface, the first support surface being a plane; The second mold includes a second mold closing plane, and the second mold is provided with at least one second injection groove and a second support platform located in the second injection groove. The second injection groove is disposed on the second mold closing plane. The second injection groove includes a second groove wall and a second groove bottom. The second support platform is fixed to the second groove bottom, and a second annular groove is formed between the second groove wall and the side of the second support platform. The second support platform includes a second support surface, which is a plane. When the second mold is closed with the first mold, the first groove wall and the second groove wall are spliced ​​together to form the same wall surface. The second bearing surface and the first bearing surface are separated by a preset gap in the vertical direction. The orthographic projection of the second bearing surface covers a part of the first bearing surface. The part of the first bearing surface not covered by the orthographic projection of the second bearing surface is set opposite to the bottom of the second groove. The bottom of the first groove is set opposite to the bottom of the second groove. Two pads are fixed to the bottom of the second groove. The two pads are respectively located on opposite sides of the second bearing platform. One end of the pad is fixed to the side of the second bearing platform. The other end of the pad extends towards the second groove wall. The thickness of the pad gradually decreases from the side of the second bearing platform towards the second groove wall.

18. The injection mold as described in claim 17, characterized in that, The pad includes an inclined surface extending from the side of the second support platform toward the wall of the second groove, the inclined surface being a plane or an arc surface; When the second mold is closed with the first mold, a portion of the inclined surface is positioned opposite to the first bearing surface, and another portion of the inclined surface is positioned opposite to the bottom of the first groove.

19. The injection mold as described in claim 18, characterized in that, When the second mold and the first mold are closed, a resistance heating element is disposed between the first mold and the second mold. The resistance heating element includes a heating part with multiple through holes. A resistance heating wire is disposed between two adjacent through holes. The heating part includes two oppositely disposed embedded parts. The resistance heating wire is connected between the two embedded parts. The embedded part includes multiple mutually spaced embedded pins. A notch is formed between two adjacent embedded pins. The heating part is sandwiched between the first bearing surface and the second bearing surface. A part of the embedded part is sandwiched between the first bearing surface and the second bearing surface. Another part of the embedded part is suspended between the inclined surface and the bottom of the first groove. Yet another part of the embedded part is suspended between the bottom of the first groove and the bottom of the second groove.

20. The injection mold as described in claim 19, characterized in that, The first mold closing plane is provided with at least one first receiving groove and at least one second receiving groove. The first receiving groove is arranged around the first injection groove, and the second receiving groove connects the first receiving groove and the first injection groove. When the second mold is closed with the first mold, the frame is placed between the first mold and the second mold. The frame is placed in the first receiving groove, and the part of the resistive heating element extending out of the first injection groove is placed in the second receiving groove. The frame and the resistive heating element are integrally formed. The thickness of the frame is equal to the depth of the first receiving groove, and the thickness of the resistive heating element is equal to the depth of the second receiving groove.

21. The injection mold as described in claim 20, characterized in that, The resistive heating element includes two first connecting parts, two second connecting parts, and a heating part. The heating part is connected between the two first connecting parts. Each first connecting part includes a middle section and two first embedded sections. The middle section is connected between the two first embedded sections. Each of the two second connecting parts includes a second embedded section, a third embedded section, and an extension section. The second embedded section is connected to the first connecting part. The third embedded section is connected between the second embedded section and the extension section. The extension section is connected to the frame. When the second mold and the first mold are closed, the upper surface of the middle section contacts the first bearing surface. The lower surfaces of the two first connecting parts are opposite to the bottom of the second injection molded groove. The opposite ends of the two first connecting parts extend out of the first bearing platform and are located above the first injection molded groove. The opposite ends of the two first connecting parts are the first embedded sections. The first embedded segment is suspended between the bottom of the first trench and the bottom of the second trench. The upper surface of the second embedding section is in contact with the first bearing surface, the lower surface of the second embedding section is opposite to the bottom of the second injection molded groove, the third embedding section is suspended between the bottom of the first groove and the bottom of the second groove, and the extension section is located between the second receiving groove and the second mold closing plane.

22. The injection mold as described in claim 17, characterized in that, The first groove wall is perpendicular to the first mold closing plane, and the second groove wall is perpendicular to the second mold closing plane; When the second mold is closed with the first mold, the first mold closing plane and the second mold closing plane are in contact with each other, the height of the first bearing surface is lower than the first mold closing plane, and the second bearing surface and the second mold closing plane are located on the same horizontal plane.

23. A method for manufacturing a heating device, characterized in that, The method for manufacturing the heating element utilizes the injection mold according to any one of claims 1 to 22, and the method for manufacturing the heating element includes: Place the frame and the resistance heating element on the first mold, and align the resistance heating element with the first injection groove and the first support platform; The second mold is closed with the first mold, the first injection groove and the second injection groove are combined to form an injection cavity, and the middle part of the resistance heating element is sandwiched between the first support platform and the second support platform; Injection molding liquid into the injection cavity, the injection molding liquid partially covers the resistive heating element, and after curing, the injection molding liquid forms a support, which is combined with the resistive heating element; The heating element is formed by demolding.

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