WO2021143830A1

WO2021143830A1 - Injection-molded heating assembly, injection mold and injection molding method

Info

Publication number: WO2021143830A1
Application number: PCT/CN2021/072118
Authority: WO
Inventors: 李辉; 刘翔
Original assignee: 深圳市博迪科技开发有限公司
Priority date: 2020-01-19
Filing date: 2021-01-15
Publication date: 2021-07-22
Also published as: CN111134375A

Abstract

An injection-molded heating assembly, and an injection mold and an injection molding method for the heating assembly. The heating assembly comprises a heating body (1) and a base (2), wherein the heating body (1) comprises a heating circuit (11) and a heating body shell covering the heating circuit (11), and no gap is left at the contact position of the heating circuit (11) and the heating body shell; the lower part of the heating body (1) is fixedly held by the base (2), and no gap is left at the contact position of the heating body (1) and the base (2). The base (2) and the heating body (1) are injection-molded, and the heating circuit (11) and the heating body shell are injection-molded, so that the joint of the heating body (1) and the base (2) can be sealed, cigarette residues after smoking are prevented from permeating downwards, and the use performance of a cigarette utensil is improved.

Description

Injection molding heating component, injection mold and injection molding method

Technical field

The invention belongs to the technical field of heating elements for a novel smoking set, and particularly relates to an injection-molded heating component, an injection mold for the heating component, and an injection method.

Background technique

In the field of heating cigarettes, the heating components used in most current research or products include a heating element and a base for fixing the heating element. The base has a through hole for the heating element to pass through. The shape of the through hole is usually the same as that of the heating element. The shape of the heating element is matched, for example, it can be any shape such as a circle, a rectangle, a slit, and the like. The material requirements of the heating element and the base are different. The material of the heating element requires good thermal conductivity, high strength, and not easy to bend, such as metal and ceramics. The base of the heating element is required to be made of insulating material with good heat insulation effect. Therefore, the heating element and the base are generally prepared separately, and the two can be connected when in use. Moreover, the connection between the two is mostly through mechanical splicing or pressing, which will inevitably cause a gap between the base of the heating element and the heating element. With the extension of use time, the residue after smoking the heated cigarette, such as The tar will penetrate under the heating element base and further corrode the control board or other components.

In addition, in the past, the heating element shell and heating circuit were prepared independently, and the heating circuit needed to be manually installed in the groove in the heating element shell, which was complicated to manufacture and install.

Therefore, it is desirable to propose a solution to solve the above-mentioned problems.

Summary of the invention

The first aspect of the present invention provides an injection-molded heating component, the heating component includes: a heating element 1, a base 2;

Wherein: the heating element 1 includes a heating circuit 11 and a heating body casing wrapped around the heating circuit 11, and there is no gap between the heating circuit 11 and the heating body casing. The end has a heating circuit pin 3 protruding outside the heating body shell;

The lower part of the heating element 1 is surrounded by the base 2 and there is no gap in the contact between the heating element 1 and the base 2;

The heating circuit pins 3 are exposed outside the base 2.

The heating element shell has good thermal conductivity, and its material includes any material that does not deform at 600 degrees Celsius and can be molded by an injection process, such as metals, alloys, and some special ceramics such as composite ceramics.

Preferably, there is no additional sealing material or seal at the contact between the heating element 1 and the base 2, and the heating element 1 and the base 2 are only sealed by the close contact; and the heating circuit 11 and There is no additional sealing material or seal at the contact between the heating element shell and the heating circuit 11 and the heating element shell are only sealed by the close contact between the two.

Preferably, at least a part of the outer surface of the heating circuit 11 covered by the heating body shell is provided with an insulating layer. When the heating element shell is made of an insulator, the part of the outer surface of the heating circuit 11 covered by the heating element shell does not have an insulating layer.

The heating circuit 11 can generate a stable heat source to heat the smoking article to generate smoke for the human body to inhale.

Preferably, the portion of the heating circuit 11 covered by the heating element shell is provided with protrusions or depressions.

The heating circuit pin 3 is connected to the power supply to provide the power required for heating, and can also be used to measure the temperature of the heating body, and play the role of transmitting control signals.

Preferably, the base 2 is a cylindrical body, and a sealing ring groove 2-1 is provided on the outer peripheral surface thereof, and a sealing ring is provided in the sealing ring groove 2-1. The sealing ring is used to prevent cigarette residues from penetrating downward from the outer edge of the base 2.

Preferably, the peripheral edge of the base 2 is provided with a positioning groove. The positioning groove is used for guiding and positioning the heating element 1 so that the installation position and direction in different smoking articles are kept consistent.

Preferably, the bottom of the base 2 is also provided with a fixed post. The fixing post is used to fix the heating component to the parts of the smoking set.

Preferably, the portion of the heating element 1 surrounded by the base 2 is provided with protrusions.

Preferably, the heating element 1 further includes a temperature measurement circuit, and the temperature measurement pin is also the heating circuit pin 4.

The heating element 1 has a rod-like or sheet-like structure with a sharp point.

Preferably, the base 2 is selected from materials that do not deform at 320 degrees Celsius, that is, materials that can withstand a temperature of 320 degrees Celsius.

Preferably, the base 2 is made of a high temperature resistant material, the high temperature resistant is the temperature that the heating element 1 can withstand at the operating temperature, and the operating temperature of the heating element 1 is 280°C-480°C. At this time, the temperature of the base 2 itself is about 200-320 degrees Celsius, and the base 2 is selected from materials that do not deform at 200-320 degrees Celsius. The base 2 is preferably a PEEK polyether ether ketone material.

A second aspect of the present invention provides an injection mold for the heating component of the first aspect, and the mold includes:

Mold base 7, heating element molding place 5, base molding place 6, heating element injection pipe 4 and base injection pipe 8;

The mold base 7 is provided with a heating element forming part 5, the size and shape of which are adapted to the size of the heating element 1; the mold base 7 is also provided with a base forming part 6, which is arranged on the heating element Below the molding place 5, the size and shape are consistent with the base 2;

The base injection pipe 8 is in fluid communication with the base molding part 6;

The heating element injection pipe 4 is in fluid communication with the heating element molding place 5.

Wherein, the mold base 7 is the carrier of the entire mold, and a material with a higher density and higher resistance to the injection temperature of the heating element, such as stainless steel, T10, CrWMn, Cr12MoV, T8, etc., is selected.

A "herringbone"-shaped base injection pipe 8 is provided next to the base forming part 6, and the base molding part 6 is connected to the base injection pipe 8; the "herringbone" shaped base injection pipe 8 is used to input the injection slurry into the base Molding place 6.

The heating element molding part 5 is provided with a "herringbone" shaped heating element injection pipe 4, the heating element molding part 5 is connected to the heating element injection pipe 4, and the "herringbone" shaped heating element injection pipe 4 is used for The heating body slurry is input into the heating body forming place 5.

A third aspect of the present invention provides an injection molding method for the heat generating component described in the first aspect. Using the injection mold described in the second aspect includes the following steps:

Put the heating circuit 11 into the heating body forming part, and the heating circuit pins 3 are exposed outside the heating body forming part, keeping the base forming part 6 and the heating body forming part 5 out of fluid communication

Then the prepared heating element slurry is sent into the heating element injection pipe 4, and the heating element slurry enters the heating element molding place 5 along the heating element injection pipe 4, and the heating element is molded Place 5 is filled with the heating element slurry, and then cooled to obtain the heating element 1;

Keep the base molding part 6 in fluid communication with the heating element molding part 5, and then send the prepared injection slurry into the base injection pipe 8, and the injection slurry enters along the base injection pipe 8 In the base molding part 6, the base molding part 6 is filled with the injection slurry, cooled, and taken out to obtain the heat generating component described in the first aspect.

Preferably, the temperature of the heating element 1 during injection molding is 600-2000°C; the temperature of the base 2 during injection molding is 380-400°C.

The above technical solutions can be freely combined without contradiction.

The present invention has the following beneficial effects:

1. In the prior art, the base and the heating element are generally made separately and independently. The present invention designs for the first time a heating element in which the base and the heating element are integrally formed. The base and the heating element are integrally formed by in-mold injection molding of the base, which can realize the sealing of the connection between the heating element and the base and prevent cigarettes after smoking The residue penetrates downward to better protect the components under the heating element base and improve the use performance of the smoking set. In addition, in the past, the heating element shell and the heating circuit were independently prepared, and the heating circuit needed to be manually installed in the groove in the heating body shell, which was complicated to manufacture and install. The present invention simplifies the manufacturing process of the heating body, The body shell is also fixed as a whole by injection molding, while ensuring that the heating circuit and the heating body shell are tightly sealed, and the heating circuit will not fall off.

2. In the preferred technical solution, the base is a concave cylindrical body, a sealing ring groove is provided in the concave part of the base, and a sealing ring is arranged in the sealing ring groove to prevent cigarette residues from penetrating down from the outer edge of the base , Further improve the sealing effect of the base.

3. Compared with the process of independently preparing the heating element and the base, and then splicing or pressing together. The preparation process of the invention is simple, and the sealing durability of the heating element and the base is good.

Description of the drawings

Fig. 1 is a schematic diagram of the overall structure of the heating component of the first embodiment.

Fig. 2 is a schematic diagram of the heating circuit structure of the first embodiment.

Fig. 3 is a schematic diagram of the structure of the injection mold of Example 3 in the state of injection of the heating element.

Fig. 4 is a schematic diagram of the structure of the injection mold of Example 3 in the injection molding base state.

The reference signs are:

1-heating body, 2-base, 2-seal ring groove, 3-heating pin, 11-heating circuit, 4-heating body injection pipe, 5-heating body molding place, 6-base molding place, 7- Mold base, 8-base injection pipe.

Detailed ways

The content of the present invention will be further described below through specific implementations.

Example 1

As shown in Figures 1 and 2, an injection-molded heating component, the heating component includes: a heating element 1, a base 2;

Wherein: the heating element 1 includes a heating circuit and a heating body casing wrapped around the heating circuit, there is no gap between the heating circuit 11 and the heating body casing, and the end of the heating circuit 11 has Heating circuit pin 3 protruding outside the heating body shell;

The heating circuit pins 3 are exposed outside the base 2.

The heating element 1 and the base 2 do not have any additional sealing materials or seals at the contact point, and the heating element 1 and the base 2 are only sealed by the close contact; and the heating circuit 11 and the heating There is no additional sealing material or sealing element at the contact between the two body shells, and the sealing is only achieved by the close contact between the heating circuit 11 and the heating body shell.

The base 2 is a cylindrical body, and a sealing ring groove 2-1 is provided on the outer peripheral surface thereof, and a sealing ring is provided in the sealing ring groove 2-1.

The part of the outer surface of the heating circuit 11 covered by the heating body shell is provided with an insulating layer.

The portion of the heating element 1 surrounded by the base 2 is provided with protrusions.

The heat generating body shell is selected from metals.

The base 2 is selected from materials that do not deform at 320 degrees Celsius.

Example 2

An injection mold used for the heating component described in embodiment 1, the mold comprising: a mold base 7, a heating element forming part 5, a base forming part 6, a heating element injection pipe 4, and a base injection pipe 8;

The mold base 7 is provided with a heating element forming part 5, the size and shape of which are adapted to the size of the heating element 1; the mold base 7 is also provided with a base forming part 6, which is arranged on the heating element Below the molding part 5, it is in fluid communication or not in communication with the heating element molding part 5, and the size and shape are the same as those of the base 2;

The temperature of the heating element 1 during injection molding is 1000°C.

The temperature of the base 2 during injection molding is 380°C.

The heating element injection pipe 4 is a rubber pipe that can withstand a high temperature of 2500 degrees Celsius.

The injection molding pipe 8 of the base is a rubber pipe that can withstand a high temperature of 400 degrees Celsius.

Example 3

As shown in Figures 3 and 4, an injection molding method for the heating component described in Example 1, which uses the injection mold described in Example 2, includes the following steps:

Then the prepared metal slurry is fed into the heating element injection pipe 4, and the metal slurry enters the heating element forming part 5 along the heating element injection pipe 4, and the heating element is formed in the forming part 5 Fill the metal slurry and then cool to obtain the heating element 1;

Keep the base molding part 6 in fluid communication with the heating element molding part 5, and then send the prepared PEEK slurry into the base injection pipe 8, and the PEEK slurry enters the base injection pipe 8 The base molding part 6 is filled with PEEK slurry, cooled, and taken out to obtain the heat generating component described in Example 1.

The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. It should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

An injection-molded heating component, characterized in that the heating component includes: a heating element (1) and a base (2);

Wherein: the heating element (1) includes a heating circuit (11) and a heating body casing wrapped around the heating circuit (11), and there is no contact between the heating circuit (11) and the heating body casing. A gap, the end of the heating circuit (11) has a heating circuit pin (3) protruding outside the heating body shell;

The lower part of the heating element (1) is held by the base (2) in a circumferential manner, and there is no gap in the contact between the heating element (1) and the base (2);

The heating circuit pins (3) are exposed outside the base (2).
The heat-generating component according to claim 1, characterized in that there is no additional sealing material or seal at the contact between the heat-generating body (1) and the base (2), and only the heat-generating body (1) and The base (2) is in close contact and sealed; and the heating circuit (11) and the heating body shell are in contact without any additional sealing materials or seals, only the heating circuit (11) and The two heat-generating body shells are in close contact and sealed.
The heat-generating component according to claim 1, wherein the base (2) is a cylinder, and a sealing ring groove (2-1) is provided on the outer peripheral surface, and the sealing ring groove (2-1) is Set the sealing ring.
The heat-generating component according to claim 1, characterized in that, at least a part of the outer surface of the heat-generating circuit (11) covered by the heat-generating body shell is provided with an insulating layer.
The heat-generating component according to claim 1, wherein the portion of the heat-generating circuit (11) covered by the heat-generating body shell is provided with protrusions or depressions.
The heat-generating component according to claim 1, wherein the portion of the heat-generating body (1) surrounded by the base (2) is provided with protrusions or depressions.
The heat-generating component according to claim 1, wherein the material of the heat-generating body shell includes metal, alloy, or ceramics, or composite ceramics.
The heat-generating component according to claim 1, wherein the base (2) is selected from materials that do not deform at 320 degrees Celsius.
An injection mold for the heating component according to claim 1, wherein the mold includes: a mold base (7), a heating element forming part (5), a base forming part (6), and a heating element injection pipe (4) And the base injection pipe (8);

The mold base (7) is provided with a heating element forming part (5), the size and shape of which are adapted to the size of the heating element (1); the mold base (7) is also provided with a base forming part ( 6), which is arranged below the heating body forming part (5), and the size and shape are consistent with the base (2);

The base injection pipe (8) is in fluid communication with the base molding part (6);

The heating body injection pipe (4) is in fluid communication with the heating body forming part (5).
An injection molding method for the heat generating component of claim 1, wherein using the injection mold of claim 9 includes the following steps:

Put the heating circuit (11) into the heating body forming part, the heating circuit pins (3) are exposed outside the heating body forming part, and keep the base forming part (6) and the heating body forming part (5) Fluid is not connected

Then the prepared heating element slurry is sent into the heating element injection pipe 4, and the heating element slurry enters the heating element molding place 5 along the heating element injection pipe 4, and the heating element is molded Place 5 is filled with the heating element slurry, and then cooled to obtain the heating element 1;

Keep the base molding part (6) in fluid communication with the heating element molding part (5), and then send the prepared injection slurry into the base injection pipe (8), and the injection slurry runs along the The base injection pipe (8) enters the base molding part (6), the base molding part (6) is filled with the injection slurry, cooled, and taken out to obtain the heat generating component according to claim 1.