CN108835716A - A kind of heater and preparation method thereof applied to low temperature cigarette - Google Patents

Abstract

The invention provides a heater applied to low-temperature cigarettes, which is composed of a metal heating element and a heater base body, wherein the heater base body is made of a high-temperature-resistant material. The invention utilizes the heating efficiency of the metal heating element and the stability of product quality to improve the heating quality of the heating device, and combines with the heater base made of high-temperature inorganic materials to improve the heating uniformity of the product. The invention adopts the metal heating element Compared with the structure of the MCH ceramic heating element, the structural form prepared and assembled separately from the heater base has simple preparation steps, which can be completed in one firing; at the same time, the metal heating element used is convenient for detection before product assembly, and can be greatly improved. Improve product stability and facilitate product quality control.

Description

A heater applied to low-temperature cigarettes and its preparation method

technical field

The invention relates to the technical field of new cigarettes, in particular to a heater applied to low-temperature cigarettes and a preparation method thereof.

Background technique

Electric heating low-temperature cigarettes are an important direction for the current development of new tobacco. The heater is an important part of electric heating low-temperature cigarettes. have an important impact. In order to make full use of the advantages of the metal resistance heating element, such as stability, high heating efficiency, and product resistance to processing, it is necessary to design and prepare a resistance heating element with high thermal efficiency, stable heating, long product life and stable product in combination with the structure of the heater. heater products.

Contents of the invention

The invention provides a heater applied to low-temperature heating cigarettes and a preparation method thereof, which improves the heating quality of the heating device by utilizing the heating efficiency of the metal heating element and the stability of the product quality, and combines it with a high-temperature inorganic material to improve the quality of the product. Heating uniformity.

A heater applied to low-temperature cigarettes is assembled from a metal heating element and a heater base, wherein the heater base is made of a high-temperature-resistant material.

Further, the metal heating element is connected to the heater base through clamping positions (for example, clamping positions outside the base, clamping positions inside the base, or plug-in clamping positions) or wrapping.

Further, the metal heating elements are symmetrically distributed on both sides of the heater base.

Further, the shape of the heater is cylindrical, elliptical cylindrical, polygonal or conical.

Further, the metal heating element is made of noble metals, high-temperature melting point metals and their alloys, nickel-based alloys, iron-aluminum alloys or ferromagnetic materials.

Further, the noble metals include platinum, gold, silver, and palladium, and the high-temperature melting point metals include W, Mo, Ta, and Nb.

Further, the high-temperature-resistant materials include ceramics, glass, alumina, and zirconia.

Further, at the tip of the metal heating element, the heating element connection area is connected to the heater base, and the heating element connection area and the metal heating element are in an integrated structure or adopt a separate assembly structure.

A preparation method for a heater applied to low-temperature cigarettes, comprising the steps of:

Step 1. Design the specific structure of the product according to the target heater structure;

Step 2. Add 80%-96% alumina ceramic powder plus 4%-20% ceramic binder solution according to the mass percentage, put it into the mixing equipment and mix well, cover the sample with plastic wrap, and place it in a cool place. Dry place 16h-24h;

Step 3. According to the designed special mold, at normal temperature, the inorganic high temperature resistant green body of the heater is prepared by extrusion molding or injection molding, that is, the green body of the heater matrix;

Step 4. Put the green body sample into the oven at 50°C-100°C and dry for 10h-48h after forming;

Step 5. Firing system: heat up to 500°C at 5-10°C/min, then fire at a rate of <8°C/min to 1450°C to obtain heater base 2, holding time: 700°C, 850°C , 1000°C, 1150°C, 1300°C each for 15min-60min, and the highest firing temperature for 60min-240min;

Step 6: Assembling the heater substrate prepared in Step 5 and the metal heating element into a complete shape to obtain the heater for low-temperature cigarettes.

A preparation method for a heater applied to low-temperature cigarettes, comprising the steps of:

Step 1. Mix 60-90% ZrO ₂ , 0.5%-10% SiO ₂ , 1%-30% Al ₂ O ₃ plus 0.1%-10% ceramic binder solution according to mass percentage;

Step 2. Cold isostatic pressing: using a cold isostatic press and a designed and prepared special mold, at a temperature of about 60°C-100°C, the zirconia mixed raw material is formed into a green body;

Step 3. Blank trimming: After the mold is removed, remove the excess part of the surface of the blank at the joint of the mold;

Step 4. Pre-firing: heat the repaired zirconia green body in the debinding furnace at <10°C/min, from room temperature to 500°C, holding time: 100°C, 200°C, 300°C, 400°C for 30 minutes each- 60min, the maximum degumming temperature is 500°C and keep warm for 60min-240min, so that the organic matter can be fully exhausted;

Step 5. Firing: heat up to 500°C at 10°C/min, then fire at 1500°C at a heating rate of <5°C/min. Holding time: 600°C, 700°C, 800°C, 900°C, 1000°C ℃, 1100℃, 1200℃, 1300℃, 1400℃ each for 15min-45min, and the highest firing temperature is 1500℃ for 60min-360min;

Step 6. Size determination: modify the size of the zirconia heater substrate on the CNC grinding machine to meet the product requirements;

Step 7. Assembling the heater substrate prepared in step 6 and the metal heating element into a complete shape to obtain the heater for low-temperature cigarettes.

The heater of the present invention adopts a structural form in which a metal heating element and a heater base are separately prepared and assembled. Compared with the structure of the MCH ceramic heating element, the preparation steps are simple and can be completed in one firing; at the same time, the metal heating element used , It is convenient to detect before the product is assembled, which can greatly improve the stability of the product and facilitate the control of product quality.

Description of drawings

Fig. 1 is a schematic cross-sectional view of a heater applied to low-temperature cigarettes according to the present invention;

Fig. 2 is a combined cross-sectional schematic view of the heater in Fig. 1;

Fig. 3 is a schematic cross-sectional view of another heater applied to low-temperature cigarettes of the present invention;

Fig. 4 is a schematic cross-sectional view of yet another heater applied to low-temperature cigarettes of the present invention;

Fig. 5 is another combined cross-sectional schematic diagram of the heater applied to low-temperature cigarettes according to the present invention;

Fig. 6 is a schematic cross-sectional view of another combination of the heater applied to low-temperature cigarettes according to the present invention.

In the figure: 1-metal heating element; 2-heater substrate; 3-substrate outsourcing clamping position; 4-heating element connection area; 5-heater substrate end; 6-electrode pin; 7-substrate inner packaging clamping position ; 8-surface heating element; 9-plug-in card position; 10-base.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention.

Please refer to Fig. 1 and Fig. 2, one embodiment of the heater applied to low-temperature cigarettes of the present invention consists of two parts, namely a metal heating element 1 and a heater base 2, and the two parts are connected through the base outer wrapping position 3 at the connection. connect. The metal heating element 1 is distributed on both sides of the heater base 2, and is connected to the heater base 2 by the heating element connection area 4 at the tip of the metal heating element 1, wherein the heating element connection area 4 and the metal heating element 1 can be One-piece structure, in another embodiment, a separate assembly structure can be used.

In this example, the inside of the connecting area 4 of the heating element is the end portion 5 of the heater base body, and the two parts form the end portion of the heater.

The metal heating element 1 is generally symmetrically distributed on both sides of the heater base 2, and is connected with the metal heating element 1 in a slotted manner by the base outsourcing clamping positions 3 (as shown in FIG. 2 ) on both sides of the heater base 2 respectively, and then Fix the metal heating element 1 to make it an integral heater structure. The shape of the heater can be a variety of structural forms such as cylindrical, elliptical cylindrical, polygonal, and conical.

The metal heating element 1 is made of noble metal (Pt), high-temperature melting point metal (W, Mo, Ta, Nb) or its alloy, nickel-based alloy, iron-aluminum alloy and ferromagnetic material, such as iron-chromium-aluminum alloy, iron-aluminum alloy alloy, inconel, nickel-chromium alloy, copper-nickel alloy, thermocouple wire and other precision alloy materials, and the metal heating element 1 is processed into a structural form that matches the heater base 2.

The heater base 2 is generally made of high temperature resistant materials, such as ceramics, glass, alumina or zirconia, etc., and according to the design requirements of the product, the heater base 2 is designed to match the metal heating element 1, and the alumina heater Taking the substrate as an example, the preparation steps are as follows:

1. Mixing of raw materials: Add 80%-96% alumina ceramic powder plus 4%-20% ceramic binder solution, put it into the mixing equipment and mix well, cover the sample with plastic wrap, and place it in a cool and dry place. 16h-24h;

2. Extrusion molding: according to the designed special mold, at room temperature, the inorganic high temperature resistant green body of the heater (the green body of the heater base 2) is prepared by extrusion molding process;

3. Drying: put the green body sample into the oven at 80°C after forming, and dry for 12h-24h;

4. Firing system: heat up to 500°C at 10°C/min, then fire at a heating rate of <8°C/min to 1450°C, holding time: 700°C, 850°C, 1000°C, 1150°C, 1300°C ℃ for 15min-60min each, and the highest firing temperature for 60min-240min;

In another embodiment of the present invention, the preparation steps of the zirconia heater substrate 2 are as follows:

1. Add ZrO ₂ , SiO ₂ , and Al ₂ O ₃ to 60-90%, 0.5%-10%, and 1%-30% respectively, plus 0.1%-10% by mass ceramic binder solution, and mix them ;

2. Cold isostatic pressing: use a cold isostatic press and a specially designed and prepared mold to shape the zirconia mixed raw material at a temperature of about 60°C-100°C;

3. Blank trimming: After the mold is removed, the excess part of the surface of the blank at the joint of the mold is removed;

4. Pre-firing: In the debinding furnace, the repaired zirconia body will be heated from room temperature to 500°C at <10°C/min, and the holding time: 100°C, 200°C, 300°C, and 400°C for 30min-60min each , the maximum degumming temperature is 500°C and the temperature is kept for 60min-240min, so that the organic matter can be fully exhausted;

5. Firing: heat up to 500°C at 10°C/min, then fire at 1500°C at a heating rate of <5°C/min, holding time: 600°C, 700°C, 800°C, 900°C, 1000°C , 1100°C, 1200°C, 1300°C, 1400°C each for 15min-45min, and the highest firing temperature is 1500°C for 60min-360min;

6. Dimensioning: The size of the zirconia heater substrate 2 is revised on the CNC grinding machine to meet the product requirements.

The heater base 2 and the metal heating element 1 prepared according to the steps of the above-mentioned embodiments are assembled into a complete shape through the clamping position 3 outside the base or other combination methods.

In this embodiment, the other end of the metal heating element 1 is provided with an electrode pin 6, and the electrode pin 6 is connected to the heater base 2 through the clamp position 3 outside the base, and the electrode pin 6 is formed by the electric heating electrode. Low material preparation, such as copper, etc. The electrode pin 6 includes at least two pins. In another embodiment of the present invention, as shown in FIG. 4 , the metal heating element 1 and the electrode pin 6 adopt an integrated structure.

An embodiment of the present invention shown in FIG. 3 is similar to the embodiment shown in FIGS. 1 and 2 , except that it also includes a heater base 10 . The presence of the base 10 facilitates better connection with heating appliances.

Figure 5 and Figure 6 show that in other embodiments of the present invention, the metal heating element 1 and the heater base 2 have different connection forms. connect. The metal heating element 1 shown in FIG. 6 adopts an arc-shaped surface heating element 8 , and the surface heating element 8 is connected to the heater base 2 through a plug-in clamp 9 .

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any changes or substitutions that can be easily imagined by those skilled in the art within the technical scope disclosed in the present invention, All should be covered within the protection scope of the present invention.

Claims (10)

1. a kind of heater applied to low temperature cigarette, it is characterised in that：Including metallic heating body and heater substrate assembling At wherein heater substrate is prepared by heat-resisting material.

2. being applied to the heater of low temperature cigarette as described in claim 1, it is characterised in that：The metallic heating body with it is described Heater substrate is attached by detent or package.

3. being applied to the heater of low temperature cigarette as claimed in claim 1 or 2, it is characterised in that：Metallic heating body is at symmetrical The two sides for being distributed in heater substrate.

4. being applied to the heater of low temperature cigarette as described in claim 1, it is characterised in that：The shape of the heater is circle Column, elliptic cylindrical shape, chip, polygon or taper.

5. being applied to the heater of low temperature cigarette as described in claim 1, it is characterised in that：The metallic heating body is by your gold Belong to, high temperature melting point metals and its alloy, nickel-base alloy, iron aluminum series alloy or ferromagnetic material are made.

6. being applied to the heater of low temperature cigarette as claimed in claim 5, it is characterised in that：The noble metal include platinum, gold, Silver, palladium, the high temperature melting point metals include W, Mo, Ta, Nb.

7. being applied to the heater of low temperature cigarette as described in claim 1, it is characterised in that：The heat-resisting material includes pottery Porcelain, glass, aluminium oxide, zirconium oxide.

8. being applied to the heater of low temperature cigarette as described in claim 1, it is characterised in that：At metallic heating body tip by Heater bonding pad is connect with heater substrate, and heater bonding pad is an integral structure with metallic heating body or using separating group Dress formula structure.

9. a kind of preparation method of the heater applied to low temperature cigarette, it is characterised in that include the following steps：

Step 1: according to the specific structure of target heater structure deisgn product；

Step 2: according to mass percent that the ceramic binder of the additional 4%-20% of 80%-96% aluminium oxide ceramics powder is molten Liquid is put into uniform mixing equipment and mixes, and sample is covered with preservative film, is placed on 16h-24h at shady and cool drying；

Step 3: at normal temperature, being prepared and being added using the techniques such as extrusion molding or note solidification forming according to the particular manufacturing craft of design Hot device inorganic high-temperature resistant green body, the i.e. green body of heater substrate；

Step 4: green body sample is put into baking oven at 50 DEG C -100 DEG C after molding, dry 10h-48h；

Step 5: calcining system：500 DEG C are warming up to 5-10 DEG C/min, is rising to 1450 DEG C with the heating rate of 8 DEG C/min of < It is fired to obtain heater substrate 2, soaking time：700 DEG C, 850 DEG C, 1000 DEG C, 1150 DEG C, 1300 DEG C of each heat preservation 15min- 60min, maximum sintering temperature keep the temperature 60min-240min；

It carries out being assembled into complete molding with metallic heating body Step 6: step 5 is prepared gained heater substrate, obtain described Heater applied to low temperature cigarette.

10. a kind of preparation method of the heater applied to low temperature cigarette, it is characterised in that include the following steps：

Step 1: according to mass percent by the ZrO of 60-90%₂, 0.5%-10% SiO₂, 1%-30% Al₂O₃It is additional The ceramic bond agent solution of 0.1%-10% is mixed；

Step 2: cold isostatic compaction：The particular manufacturing craft prepared using cold isostatic press and design, at 60 DEG C -100 DEG C or so At a temperature of, blank forming is carried out to zirconium oxide mixed raw material；

Step 3: repaired biscuit：After demoulding, the billet surface redundance of mold junction is rejected；

Step 4: pre-burned：Zirconia green body will be fixed in draft glue discharging furnace with 10 DEG C/min of <, and be warming up to 500 DEG C from room temperature, protect The warm time：100 DEG C, 200 DEG C, 300 DEG C, 400 DEG C of each heat preservation 30min-60min, 500 DEG C of heat preservation 60min- of highest dump temperature 240min drains organic matter sufficiently；

Step 5: firing：500 DEG C are warming up to 10 DEG C/min, is burnt rising to 1500 DEG C with the heating rate of 5 DEG C/min of < System, soaking time：600 DEG C, 700 DEG C, 800 DEG C, 900 DEG C, 1000 DEG C, 1100 DEG C, 1200 DEG C, 1300 DEG C, 1400 DEG C of each heat preservations 15min-45min, 1500 DEG C of heat preservation 60min-360min of maximum sintering temperature；

Step 6: scale cun：Zirconium oxide heater substrate progress size is revised on numerical control sander, reaches product requirement；

It carries out being assembled into complete molding with metallic heating body Step 7: step 6 is prepared gained heater substrate, obtain described Heater applied to low temperature cigarette.