WO2024250638A1 - Aerosol generating matrix manufacturing method and manufacturing device - Google Patents

Abstract

An aerosol generating matrix manufacturing method, comprising: performing room temperature extrusion molding on a mixed material, to cause the mixed material to form an extruded matrix; performing negative pressure drying on the extruded matrix in a vacuum environment. The manufacturing method combines room temperature extrusion molding with negative pressure drying, which can not only achieve a uniform and stable aerosol generating matrix having uniform internal pore distribution and high processability, but also achieve continuous production of the aerosol generating matrix with high production efficiency and low manufacturing costs. In addition, an aerosol generating matrix manufacturing device is ​​provided.

Description

A method and device for manufacturing an aerosol-generating substrate

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on the Chinese patent application with application number 202310684825.9 and application date June 9, 2023, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference.

Technical Field

The present application relates to the technical field of smoking products, and in particular to a method and equipment for manufacturing an aerosol generating substrate.

Background Art

Smoking articles include smoking articles that form aerosols by ignition and smoking articles that form aerosols by heating without burning. In a typical smoking article that heats without burning, it contains an aerosol-generating substrate such as tobacco or other plant materials, flavor materials and/or atomizers that can volatilize when heated to produce an aerosol. The aerosol-generating substrate is heated by an external heat source so that it is heated just enough to emit a fragrance. The aerosol-generating substrate does not burn, but instead loads the atomizer and releases the atomizer by heating when used to form smoke.

Aerosol generating substrates There are three main types of aerosol generating substrates: particle type, traditional tobacco type and sheet type. However, in the related art, the manufacturing method of the aerosol generating substrate is complicated, the equipment investment is high, the production efficiency is low and the environmental pollution is great.

Summary of the invention

In view of this, the embodiments of the present application hope to provide a method and a manufacturing device for an aerosol generating substrate with high production efficiency and low cost.

To achieve the above object, the present application provides a method for manufacturing an aerosol generating substrate, the manufacturing method comprising:

Extruding the mixed material at room temperature to form an extrusion matrix;

The extruded matrix is dried under negative pressure in a vacuum environment.

In one embodiment, the extrusion temperature of the room temperature extrusion molding is 10°C to 90°C.

In one embodiment, the temperature of the vacuum environment is greater than 20°C and less than 100°C.

In one implementation, the absolute pressure of the vacuum environment is 0 kPa to 101.325 kPa.

In one embodiment, the extrusion pressure of the room temperature extrusion molding is 0.5 bar to 300 bar.

In one embodiment, the extrusion temperature is 35°C to 70°C.

In one embodiment, the absolute pressure is 4 kPa to 20 kPa.

In one embodiment, the extrusion pressure is 20 bar to 80 bar.

In one embodiment, the extrusion method of the room temperature extrusion molding is one of horizontal extrusion, vertical extrusion and inclined extrusion.

In one embodiment, the extruded matrix is subjected to negative pressure drying, comprising:

The extruded matrix is dried under negative pressure by using at least one heating method selected from microwave heating, resistance heating and infrared heating.

In one embodiment, the manufacturing method further comprises: slitting the extruded matrix into set lengths.

In one embodiment, the cutting the extruded matrix into the set length comprises: before the extruded matrix is subjected to the negative pressure drying, the cutting the extruded matrix into the set length.

In one embodiment, the cutting of the extruded matrix into set lengths comprises: pre-cutting the extruded matrix before the negative pressure drying of the extruded matrix, and cutting the pre-cut extruded matrix into the set lengths after the negative pressure drying of the extruded matrix.

In one embodiment, the slitting is performed by physical contact slitting in which a slitting tool contacts the extruded matrix.

In one embodiment, the slitting is performed by non-physical contact slitting between a slitting tool and the extruded matrix.

In one embodiment, before the negative pressure drying of the extruded matrix, the manufacturing method further comprises: cooling and hardening the extruded matrix.

In one embodiment, the cooling and hardening of the extruded matrix comprises:

The extruded matrix is placed in a low temperature environment for cooling, wherein the temperature of the low temperature environment is lower than the hardening temperature of the extruded matrix.

In one embodiment, the hardening temperature is -100°C to 60°C, and the temperature of the low temperature environment is -270°C to 60°C.

In one embodiment, the cooling and hardening of the extruded matrix comprises: directly exchanging heat between the extruded matrix and a refrigerant.

In one embodiment, the cooling and hardening of the extruded matrix comprises: indirectly exchanging heat between the extruded matrix and a refrigerant.

In one embodiment, after the extruded matrix is hardened, the manufacturing method further comprises: cutting the extruded matrix into set lengths.

In one embodiment, the hardness of the extruded matrix after cooling and hardening is 1HB to 200HB.

In one embodiment, the temperature of the extruded matrix after cooling and hardening is -50°C to 5°C.

In one embodiment, the hardness of the extruded matrix after the negative pressure drying is 40HB to 300HB.

In one embodiment, the water content of the extruded matrix after the negative pressure drying is 3% to 20% of the total weight of the extruded matrix.

In one embodiment, the components of the mixed material include a solid material and a liquid material. Before the mixed material is subjected to room temperature extrusion molding, the manufacturing method further includes:

The solid material and the liquid material are divided into two modules for feeding respectively.

In one embodiment, the solid material and the liquid material are divided into two modules for feeding respectively, comprising:

adding the solid material;

When the solid material moves along the material conveying direction to the adding position of the liquid material, the liquid material is added to the solid material.

In one embodiment, after the extruded matrix is subjected to negative pressure drying, the manufacturing method further comprises: The method comprises: wrapping a packaging layer on the outer surface of the extruded matrix.

In one embodiment, after the extruded matrix is dried under negative pressure, the manufacturing method further comprises: sealing and packaging the extruded matrix.

In one embodiment, in 100 parts by weight of the mixed material, the plant raw material is 30 to 90 parts, the auxiliary raw material is 1 to 15 parts, the smoke agent raw material is 5 to 30 parts, the adhesive raw material is 1 to 10 parts, and the fragrance raw material is 1 to 15 parts.

The present application embodiment provides a manufacturing device for an aerosol generating substrate, comprising:

An extruder, the extruder is used to perform room temperature extrusion molding on the mixed material so that the mixed material forms an extrusion matrix;

A vacuum drying device is used to perform negative pressure drying on the extruded matrix.

In one embodiment, the extrusion die of the extruder is a single-die single-mouth die having a bottom die, and a mouth die at the discharge end of the bottom die.

In one embodiment, the extrusion die of the extruder is a single-die multi-die having a bottom die, and a discharge end of the bottom die having a plurality of die openings.

In one embodiment, the extrusion die of the extruder is a multi-opening die having a plurality of bottom dies, and the discharge end of each bottom die has a plurality of opening dies.

In one embodiment, the manufacturing apparatus further comprises a hardening device and two slitting devices;

The hardening device is disposed between the extruder and the vacuum drying device to cool and harden the extruded matrix before the negative pressure drying;

One of the two slitting devices is arranged between the hardening device and the vacuum drying device, so as to pre-slit the extruded matrix that has undergone the cooling and hardening before the negative pressure drying; the other of the two slitting devices is arranged downstream of the vacuum drying device along the material conveying direction, so as to cut the extruded matrix that has undergone the negative pressure drying into set lengths.

In one embodiment, the manufacturing equipment further comprises a hardening device and a slitting device;

The hardening device is disposed between the extruder and the vacuum drying device to cool and harden the extruded matrix before the negative pressure drying;

The slitting device is arranged between the hardening device and the vacuum drying device to Before performing the negative pressure drying, the extruded matrix that has been cooled and hardened is cut into set lengths.

The embodiment of the present application provides a method and equipment for manufacturing an aerosol generating matrix, the manufacturing method mainly involves extrusion molding the mixed material at room temperature, and then negative pressure drying the extruded matrix in a vacuum environment. Room temperature extrusion molding can ensure the stability of the rheological properties of the slurry, and the endogenous components of the extruded extruded matrix are stable, while negative pressure drying can ensure that the shrinkage rate of the extruded matrix is small and the drying time is short, which is convenient for realizing continuous production. The combination of room temperature extrusion molding and negative pressure drying can not only realize the uniformity and stability of the aerosol generating matrix, the uniform distribution of internal pores, and the high processability of the aerosol generating matrix, but also realize the continuous production of the aerosol generating matrix, with high production efficiency and low manufacturing cost.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a method for manufacturing an aerosol generating substrate according to an embodiment of the present application;

FIG2 is a schematic structural diagram of an aerosol generating substrate manufacturing device according to an embodiment of the present application, wherein a mixed material and an extruded substrate are shown at the same time;

FIG3 is a cross-sectional view of the manufacturing equipment shown in FIG2 ;

FIG4 is a schematic structural diagram of another aerosol-generating substrate manufacturing device according to an embodiment of the present application, in which a mixed material and an extruded substrate are shown at the same time;

FIG5 is a cross-sectional view of the manufacturing equipment shown in FIG4;

FIG6 is a schematic structural diagram of a first extrusion die of an embodiment of the present application;

FIG7 is a schematic diagram of the structure of a second extrusion die according to an embodiment of the present application, and also shows an extruded matrix;

FIG8 is a schematic structural diagram of a third extrusion die according to an embodiment of the present application, in which an extrusion matrix and an adapter are shown at the same time;

FIG9 is a schematic structural diagram of a vacuum drying device according to an embodiment of the present application, and also shows an extruded matrix;

FIG10 is a schematic structural diagram of a hardening device according to an embodiment of the present application, in which an extrusion die and an extrusion matrix are shown;

FIG11 is a cross-sectional view of the hardening device shown in FIG10 ;

FIG12 is a schematic structural diagram of another hardening device according to an embodiment of the present application, which also shows an extruded matrix;

FIG13 is a cross-sectional view of a first extruded matrix according to an embodiment of the present application;

FIG14 is a schematic diagram of the structure of a second extruded matrix according to an embodiment of the present application;

FIG15 is a schematic diagram of the structure of a third extruded matrix according to an embodiment of the present application;

FIG16 is a flow chart of a first manufacturing method according to an embodiment of the present application;

FIG17 is a flow chart of a second manufacturing method according to an embodiment of the present application;

FIG18 is a flow chart of a third manufacturing method according to an embodiment of the present application;

FIG. 19 is a flow chart of a fourth manufacturing method according to an embodiment of the present application.

DETAILED DESCRIPTION

An embodiment of the present application provides a method for manufacturing an aerosol-generating substrate. The aerosol-generating substrate is used in conjunction with an electronic atomization device having a heating component. Specifically, the heating component heats and atomizes the aerosol-generating substrate to generate an aerosol for users to inhale or for use in medicine, beauty, etc.

Referring to FIG. 1 , the method for manufacturing the aerosol generating substrate comprises the following steps:

Step S10: Extruding the mixed material at room temperature to form an extrusion matrix;

Specifically, extrusion molding refers to a processing method in which the material is added to the extruder, and the material is pushed forward by the screw through the action between the barrel and the screw of the extruder, and continuously passes through the extrusion die at the outlet of the extruder to form various cross-section products or semi-finished products. The material formed by extrusion molding is in the form of strips.

The mixed material is a material used to manufacture an aerosol-generating matrix. The mixed material is a mixture of a solid material and a liquid material, that is, the mixed material contains a certain amount of water.

In the field of extrusion molding, the extrusion temperature (i.e. the temperature inside the barrel of the extruder) between 10°C and 90°C (including 10°C and 90°C) is defined as room temperature, the extrusion temperature below 10°C is defined as low temperature, and the extrusion temperature above 90°C is defined as high temperature.

Illustratively, the room-temperature extrusion molding of the mixed material described in the implementation of the present application may refer to extrusion molding of the mixed material within an extrusion temperature range of 10° C. to 90° C.

Temperature affects the fluidity of the mixed material in the extruder and the smoothness of the outer surface of the extruded matrix. When the extrusion temperature is lower than 10°C, the fluidity of the mixed material is poor, the production speed of the extruder is slow, the efficiency is low, and the torque provided by the extruder at this temperature is high, which affects the service life of the extruder.

When the extrusion temperature is higher than 90°C, the mixed material flows fast and the pressure of the mixed material at the extruder outlet is relatively low, which is not conducive to the molding of the mixed material. As a result, the yield rate will decrease. In addition, at this temperature, the energy consumption of the extruder is high and the production cost increases.

When the extrusion temperature is 10°C to 90°C, the mixed material has good fluidity, which is conducive to the molding of the mixed material, can ensure the stability of the rheological properties of the mixed material, and the endogenous components of the extruded extrusion matrix are stable. In addition, at this temperature, the torque provided by the extruder is low, the energy consumption of the extruder is low, and the service life of the extruder is increased while reducing the production cost.

More preferably, the extrusion temperature of room temperature extrusion molding can be 35° C. to 70° C. (including 35° C. and 70° C.).

Step S20: performing negative pressure drying on the extruded matrix in a vacuum environment.

The main purpose of negative pressure drying is to evaporate the water in the extruded matrix. If the extruded matrix contains a large amount of volatile lubricant, negative pressure drying can also remove the volatile lubricant.

It should be noted that step S20 may be the last step of the manufacturing method, that is, the dried extruded matrix is the finished product of the aerosol generating matrix. Step S20 may not be the last step of the manufacturing method, which is equivalent to the dried extruded matrix being only a semi-finished product of the aerosol generating matrix. After step S20, other processing may be performed, including but not limited to slitting, packaging, etc.

The vacuum environment can reduce the boiling point of water (i.e., the boiling point of water is lower than the boiling point of 100°C under normal pressure), so that the water in the extruded matrix can evaporate at low temperature (i.e., water evaporates below 100°C). In addition, negative pressure drying can slow down the overflow of water from the extruded matrix, so that the extruded matrix can maintain the reserved skeleton after the water overflows, thereby forming pores. The pores are the channels for the aerosol-generating matrix to release aerosols and aromas during the heating process. Therefore, negative pressure drying can increase the porosity of the aerosol-generating matrix, and thus improve the release efficiency of aerosols and aromas.

Illustratively, the temperature of the vacuum environment may be greater than 20°C and less than 100°C.

The temperature of the vacuum environment refers to the ambient temperature within the device that provides the vacuum environment.

When the temperature of the vacuum environment is lower than or equal to 20°C, it takes a long time to dry the extruded matrix, the production efficiency is low, and the production cost is high. When the temperature of the vacuum environment is higher than or equal to 100°C, the extruded matrix Thermosensitive aroma components are easily volatilized by heat. At the same time, when the temperature is higher than or equal to 100°C, the extruded matrix reaches its softening point, and the support of the outer wall of the extruded matrix decreases. Under the influence of vacuum negative pressure, the overall structure is prone to shrinkage, which causes the pores on the skeleton to shrink and deform after the water inside the extruded matrix overflows, and the porosity decreases. As a result, the channel for the aerosol-generating matrix to release aerosols and aromas is blocked, affecting the overall release efficiency.

More preferably, the temperature of the vacuum environment may be 30° C. to 60° C. (inclusive).

In addition, the hardness of the extruded matrix after negative pressure drying may be 40HB to 300HB (including 40HB and 300HB). More preferably, the hardness of the extruded matrix after negative pressure drying may be 80HB to 250HB (including 80HB and 250HB).

Another embodiment of the present application further provides a manufacturing device 100 for an aerosol generating substrate. Please refer to FIGS. 2 to 5 . The manufacturing device 100 mainly includes an extruder 110 and a vacuum drying device 120 .

The extruder 110 is used to perform room temperature extrusion molding on the mixed material 200 ′ so that the mixed material 200 ′ forms an extruded matrix 200 .

The extruder 110 can be a single-screw extruder or a twin-screw extruder. A twin-screw extruder is preferably used because, compared with a single-screw extruder, a twin-screw extruder can further homogenize the mixed material 200′ during the conveying process of the mixed material 200′, thereby improving product stability, and the extrusion efficiency of a twin-screw extruder is higher than that of a single-screw extruder.

The vacuum drying device 120 is used to dry the extruded matrix 200 under negative pressure.

The ambient temperature in the vacuum drying device 120 is the temperature of the vacuum environment mentioned above.

Exemplarily, referring to FIGS. 2 to 4 and 9, the vacuum drying device 120 may include a housing 121, a vacuum pump 122, a heating system (not shown) and an electrical instrument control system (not shown), wherein at least one partition 123 is provided in the housing 121, and a material tray 124 may be placed on the partition 123. When the extruded matrix 200 needs to be negatively dried, the material tray 124 may be taken out, the extruded matrix 200 may be placed in the material tray 124, and then the material tray 124 may be placed on the partition 123 in the housing 121. The vacuum pump 122 is used to form a vacuum in the housing 121, and the partition 123 is heated by the heating system to provide heat for the extruded matrix 200.

That is to say, the manufacturing method of the aerosol generating matrix of the embodiment of the present application mainly involves extruding the mixed material at room temperature, and then drying the extruded matrix under negative pressure in a vacuum environment. It can ensure the stability of the rheological properties of the slurry and the stability of the endogenous components of the extruded matrix, while negative pressure drying can ensure that the shrinkage of the extruded matrix is small and the drying time is short, which is convenient for continuous production. The combination of room temperature extrusion molding and negative pressure drying can not only achieve uniform and stable aerosol generation matrix, uniform internal pore distribution, and high processability of aerosol generation matrix, but also realize continuous production of aerosol generation matrix with high production efficiency and low manufacturing cost.

The mixed materials of the embodiment of the present application may include plant raw materials, auxiliary raw materials, smoke-generating agent raw materials, adhesive raw materials and flavor raw materials.

Plant raw materials are used to generate aerosols when heated. Auxiliary raw materials are used to provide skeleton support for plant raw materials. Smoke-generating agent raw materials are used to generate smoke when heated. Adhesive raw materials are used to bond various raw material components. Flavor raw materials are used to provide characteristic aromas. In this way, plant raw materials and smoke-generating agent raw materials can ensure the amount of aerosol generated, while flavor raw materials can increase the release of aroma during the inhalation process and enhance user experience. Auxiliary raw materials can not only improve the fluidity of the mixed materials, but also make the aerosol generation matrix porous to facilitate the extraction and flow of aerosols. Adhesive raw materials ensure that plant raw materials and auxiliary raw materials constitute a stable mixture to avoid loose structure.

Exemplarily, the plant raw material can be one or more combinations of powders formed after crushing tobacco raw materials, tobacco leaf fragments, tobacco stems, tobacco dust, and flavor plants. Plant raw materials are the core source of flavor. Endogenous substances in plant raw materials can produce physiological satisfaction for users. Endogenous substances such as alkaloids enter the human blood and promote the pituitary gland to produce dopamine, thereby obtaining physiological satisfaction.

Exemplarily, the auxiliary raw material can be one or more combinations of inorganic fillers, lubricants, and emulsifiers. Among them, the inorganic filler includes one or more combinations of heavy calcium carbonate, light calcium carbonate, zeolite, attapulgite, talc, and diatomaceous earth. The inorganic filler can provide a skeleton support for the plant raw material. At the same time, the inorganic filler also has micropores, which can increase the porosity of the aerosol generating matrix, thereby increasing the aerosol release rate. Lubricants include one or more combinations of candelilla wax, carnauba wax, shellac, sunflower wax, rice bran, beeswax, stearic acid, and palmitic acid. Lubricants can increase the fluidity of plant raw material powders, reduce the friction between plant raw material powders, make the overall density of plant raw material powder distribution more uniform, and reduce the pressure required for the extrusion molding process, and reduce the wear of the die. Emulsifiers include one or more combinations of polyglycerol fatty acid esters, Tween-80, and polyvinyl alcohol. Emulsifiers can to a certain extent Slow down the loss of flavor substances during storage, increase the stability of flavor substances, and improve the sensory quality of the product.

Exemplarily, the smoke-generating agent raw material may include: a monohydric alcohol (such as menthol); a polyhydric alcohol (such as propylene glycol, glycerol, triethylene glycol, 1,3-butylene glycol and tetraethylene glycol); an ester of a polyhydric alcohol (such as triacetin, triethyl citrate, a mixture of diacetin esters, triethyl citrate, benzyl benzoate, glyceryl tributyrate); a monocarboxylic acid; a dicarboxylic acid; a polycarboxylic acid (such as lauric acid, myristic acid) or an aliphatic ester of a polycarboxylic acid (such as dimethyl dodecanedioate, dimethyl tetradecanedioate, erythritol, 1,3-butylene glycol, tetraethylene glycol, triethyl citrate, propylene carbonate, ethyl laurate, Triactin, meso-erythritol, a mixture of diacetin esters, diethyl suberate, triethyl citrate, benzyl benzoate, benzyl phenylacetate, ethyl vanillate, glyceryl tributyrate, lauryl acetate) in one or more combinations.

Exemplarily, the adhesive raw material is in close contact with the component raw material interface by wetting, generating intermolecular attraction, thereby playing the role of bonding the component raw materials, such as powders, liquids, etc. The adhesive raw material can be a natural plant extract, a non-ionized modified viscous polysaccharide, including one or more combinations of tamarind polysaccharides, guar gum, and modified cellulose (such as carboxymethyl cellulose). The adhesive is used to bond the particles together, which is not easy to loosen. In addition, it improves the water resistance of the aerosol generating matrix and is harmless to the human body.

Exemplarily, the flavor raw material is used to provide a characteristic aroma, such as a solid or liquid substance of hay aroma, roasted sweet aroma, and nicotine. The flavor raw material may include one or more combinations of tobacco or other plants, flavor plant extracts, extracts, essential oils, and absolute oils; the flavor raw material may include one or more combinations of monomer flavor substances, such as megastigmatriene, neophytadiene, geraniol, nerol, and the like.

For example, in 100 parts by weight of the mixture, the plant raw material can be 30 to 90 parts, the auxiliary raw material can be 1 to 15 parts, the smoke agent raw material can be 5 to 30 parts, the adhesive raw material can be 1 to 10 parts, and the flavor raw material can be 1 to 15 parts.

According to the different structures of the extrusion die disposed at the outlet of the extruder, the extruded matrix 200 with different structures can be extruded. For example, referring to FIGS. 13 to 15 , the extruded matrix 200 with the air channel 200 a can be extruded.

The number of air passages 200a may be one or more. The air passages 200a may be as shown in FIG. The straight airway can be a spiral airway as shown in Figure 14, or a combination of a straight airway and a spiral airway. The straight airway is an airway extending along a straight line, or in other words, the extending direction of the straight airway is a straight line.

The spiral airway is an airway in which at least part of the area along the extension direction is in a curved shape with a curvature not equal to zero. For example, along the extension direction of the spiral airway, the spiral airway may have a structure in which there are both a curved segment with a curvature not equal to zero and a straight segment with a curvature of zero, or may have only a curved segment with a curvature not equal to zero and no straight segment with a curvature of zero. In other words, from the starting point to the end point of the spiral airway along the extension direction, the spiral airway does not need to extend along a straight line.

The air channel 200a can be located inside the extruded matrix 200 as shown in Figures 13 and 14, or it can be located on the outer wall of the extruded matrix 200. When the number of air channels 200a is multiple, a portion of the air channels 200a can be located inside the extruded matrix 200, and another portion of the air channels 200a can be located on the outer wall of the extruded matrix 200 as shown in Figure 15.

The shape of the cross section of the air channel 200a located inside the extruded matrix 200 is not limited. For example, the shape of the cross section can be circular, polygonal (including but not limited to triangle, square, prism, etc.), elliptical, racetrack-shaped or irregular, etc., wherein irregular refers to other symmetrical or asymmetrical shapes other than the shapes listed above.

The cross-sectional shape of the air channel 200a located on the outer side wall of the extruded matrix 200 can be semicircular, semi-elliptical, polygonal or irregular, wherein irregular refers to other symmetrical or asymmetrical shapes other than the shapes listed above.

The air channel 200a is used to increase the surface area of the aerosol generating substrate (the side wall of the air channel 200a is equivalent to a part of the surface of the aerosol generating substrate), so that the heat acting on the aerosol generating substrate can enter the interior of the aerosol generating substrate from the surface of the aerosol generating substrate to improve the heating efficiency.

It should be noted that in the related art, some aerosol generating matrices have naturally formed micropores inside. For example, for the aerosol generating matrix of a particle combination, the gaps between particles constitute micropores. However, the airway 200a described in the present application is different from the micropores. The airway 200a described in the present application is a hole in the macroscopic sense, while the micropores are holes in the microscopic sense. The cross-sectional area and length of the airway 200a are much larger than those of the micropores. The airway 200a is mainly processed. Therefore, the cross-sectional area and length of the airway 200a can be changed according to the design requirements, while the size of the micropores is determined by the size of the particles. The cross-sectional area and length of the micropores are determined by the gap between them, and the dimensions of the micropores are naturally formed by the extrusion process.

In one embodiment, the extrusion pressure of room temperature extrusion molding may be 0.5 bar to 300 bar (inclusive).

The extrusion pressure described in the embodiments of the present application refers to the extrusion pressure of the extrusion die located at the outlet of the extruder.

The extrusion pressure will affect the molding shape, surface smoothness, yield rate, and production rate of the extruded matrix. When the extrusion pressure is lower than 0.5 bar, the molding rate of the extruded matrix is low, and the product defect rate increases, which in turn leads to a slow production rate and increased production costs. When the extrusion pressure is higher than 300 bar, the transmission structure load of the extruder is high (the torque required is high), which leads to a decrease in the service life of the extruder. Therefore, controlling the extrusion pressure within the range of 0.5 bar to 300 bar can not only improve the molding rate of the extruded matrix, but also extend the service life of the extruder.

Preferably, the extrusion pressure of room temperature extrusion molding can be 20 bar to 80 bar (including 20 bar and 80 bar).

In one embodiment, the extrusion method of room temperature extrusion molding can be horizontal extrusion.

Horizontal extrusion means that the extrusion die at the extruder outlet is arranged horizontally, and the extruded matrix is extruded in the horizontal direction (such as the extruder 110 shown in Figures 2 and 3), or in other words, the extrusion direction of the extruded matrix is parallel to the horizontal plane.

For the extruded matrix forming a spiral airway, when the extruded matrix passes through the extrusion die at the outlet of the extruder, the die of the extrusion die rotates while the extruded matrix does not rotate, and the extruded matrix extruded by the rotating die directly enters the conveying device (such as the first conveying device 140 in Figures 2 and 3). Since the rotation of the die will cause a certain stress to be generated in the extruded matrix, horizontal extrusion can reduce the direct release of the stress of the extruded matrix (the generated stress can be eliminated by heating). Therefore, horizontal extrusion can improve the yield rate of the aerosol-generating matrix with a spiral airway.

In one embodiment, the extrusion method of room temperature extrusion molding can also be vertical extrusion.

Vertical extrusion means that the extrusion die at the extruder outlet is set downward, and the extruded matrix is extruded along the direction of gravity (such as the extruder 110 shown in Figures 4 and 5), or in other words, the extrusion direction of the extruded matrix is parallel to the water. The plane is vertical.

Exemplarily, referring to FIG. 4 and FIG. 5 , the manufacturing equipment 100 may be provided with a third conveying device 170 , and the extruded matrix 200 directly enters the third conveying device 170 after being extruded from the extruder 110 .

For extruded substrates with straight airways, vertical extrusion can improve the yield rate and reduce the investment cost of the extruder. It can also reduce the floor space of the extruder.

In one embodiment, the extrusion method of room temperature extrusion molding can also be inclined extrusion.

Inclined extrusion means that the extrusion die at the extruder outlet is inclined, and the angle between the extrusion direction of the extruded matrix and the horizontal plane is greater than 0° and less than 90°.

Inclined extrusion can not only reduce the extrusion pressure of the mixed material, but also facilitate the space design of other equipment.

In one embodiment, please refer to Figure 6, the extrusion die 113 can be a single-mold single-mouth die, that is, there is one bottom die 1131 (the bottom die 1131 is not shown in Figure 6, and the bottom die 1131 in Figure 7 can be referred to) at the outlet of the extruder 110, and the discharge end of the bottom die 1131 has a mouth die 1132. After the mixed material 200′ passes through the mouth die 1132, an extruded matrix 200 with an air channel 200a can be formed.

In one embodiment, please refer to FIG. 7 , the extrusion die 113 may also be a single-mode multi-port die, that is, there is one bottom die 1131 at the outlet of the extruder 110, and the discharge end of the bottom die 1131 has multiple port dies 1132. After the mixed material 200 ′ passes through the multiple port dies 1132, multiple extruded matrices 200 are simultaneously formed. When the size of the screw 112 of the extruder 110 is relatively large, a single-mode multi-port die may be selected, which can improve production efficiency and is more suitable for mass production.

In one embodiment, please refer to FIG8 , the extrusion die 113 can also be a multi-mode multi-port die, that is, the adapter 116 at the outlet of the extruder 110 is connected to a plurality of bottom dies 1131, and the discharge end of each bottom die 1131 is provided with a plurality of port dies 1132. After the mixed material 200 ′ passes through the port dies 1132 on each bottom die 1131, a plurality of extruded matrices 200 are simultaneously formed. When the size of the screw 112 of the extruder 110 is relatively large, a multi-mode multi-port die can also be selected, which can improve production efficiency and is more suitable for mass production.

In one embodiment, the absolute pressure of the vacuum environment may be 0 kPa to 101.325 kPa (including 0 kPa and 101.325 kPa).

There is a positive correlation between absolute pressure and the boiling point of water, that is, the lower the absolute pressure, the lower the boiling point of water. Therefore, by controlling the absolute pressure, the boiling point of the water in the extruded matrix can be controlled so that the water content in the dried extruded matrix can be controlled within a suitable range.

In addition, setting the absolute pressure of the vacuum environment within the range of 0 kPa to 101.325 kPa can not only effectively reduce the moisture in the extruded matrix, but also retain the aroma components and effective substances (such as alkaloids, smoke agents, etc.) in the raw materials as much as possible, thereby ensuring product quality.

Preferably, the absolute pressure of the vacuum environment may be 4 kPa to 20 kPa (including 4 kPa and 20 kPa).

In one embodiment, the water content of the extruded matrix after negative pressure drying may be 3% to 20% (inclusive) of the total weight of the extruded matrix.

When the water content in the extruded matrix is lower than 3%, during the user's suction process, the impurities generated by the aerosol-generating matrix are high, which reduces the user's suction experience. In addition, if the dried extruded matrix is subsequently processed by other methods (i.e., step S20 is not the last step of the manufacturing method), the dried extruded matrix is fragile in the subsequent processing process, which not only leads to a high defect rate in subsequent production, but also increases production costs. When the water content in the extruded matrix is higher than 20%, the smoke water content of the aerosol-generating matrix during the heating and suction process is high, and the smoke temperature is not easy to reduce, which easily causes the user to have a "hot mouth" phenomenon during the suction process, reducing the user's suction experience. Therefore, controlling the water content in the dried extruded matrix within the range of 3% to 20% of the total weight of the extruded matrix can effectively improve the user's suction experience. In addition, for the extruded matrix that is processed by it after drying, the defect rate of subsequent production can also be reduced.

Preferably, the water content of the extruded matrix after negative pressure drying may be 4% to 13% (including 4% and 13%) of the total weight of the extruded matrix.

In one embodiment, the extruded matrix may be dried under negative pressure by at least one of microwave heating, resistance heating and infrared heating.

Microwave heating refers to the use of the energy characteristics of microwaves to heat materials.

Resistance heating refers to the use of the thermal effect of electric current passing through a resistor to heat the material.

Infrared heating refers to the use of infrared radiation heat transfer to heat materials.

According to needs, only one of microwave heating, resistance heating and infrared heating can be used, or a combination of any two of them can be used, or all three of them can be used.

Microwave heating, resistance heating and infrared heating can keep the temperature of the vacuum environment at the required temperature more stably. For example, the temperature of the vacuum environment can be maintained in the range of greater than 20°C and less than 100°C, thereby better increasing the internal temperature of the extruded matrix and stimulating the vibration of water molecules inside the extruded matrix.

It should be noted that the heating method is not limited to microwave heating, resistance heating and infrared heating. In other embodiments, other heating methods can also be used as long as the extruded matrix can be dried under negative pressure.

In one embodiment, the manufacturing method may further include: cutting the extruded matrix into set lengths.

The length of the extruded matrix extruded by room temperature extrusion molding is usually relatively long, so the extruded matrix can be cut into required lengths according to different usage scenarios.

2 to 5 , the manufacturing equipment 100 is provided with a slitting device 150 having a slitting tool (not shown), and the extruded matrix 200 is slitting by the slitting tool.

There are many ways of slitting. For example, in one embodiment, physical contact slitting in which the slitting tool contacts the extruded matrix can be used. That is, the slitting tool directly contacts the extruded matrix. Physical contact slitting includes but is not limited to rotary hob cutting, cutting disc cutting, wire cutting, roller cutting, extrusion and the like.

In another embodiment, non-physical contact slitting between the slitting tool and the extruded matrix can also be used, that is, the slitting tool itself has no physical contact with the extruded matrix. Non-physical contact slitting includes but is not limited to laser cutting, plasma cutting, air knife, water knife and the like.

In one embodiment, the extruded matrix can be cut into set lengths before the extruded matrix is subjected to negative pressure drying. In other words, the extruded matrix is first cut into set lengths and then subjected to negative pressure drying.

In one embodiment, the extruded matrix may be pre-cut before the extruded matrix is subjected to negative pressure drying, and the pre-cut extruded matrix may be cut into set lengths after the extruded matrix is subjected to negative pressure drying.

Pre-slitting is equivalent to the initial slitting of the extruded matrix, and the length of the extruded matrix after pre-slitting is longer than the set length.

For example, referring to FIG. 2 and FIG. 3 , for a manufacturing device 100 that needs to be pre-cut, two cutting devices 150 can be provided. The first cutting device 150 is provided along the material of the vacuum drying device 120. Upstream of the conveying direction, the second slitting device 150 is arranged downstream of the vacuum drying device 120 along the material conveying direction. The first slitting device 150 is used to pre-slit the extruded matrix 200, and the second slitting device 150 is used to slit the extruded matrix 200 after negative pressure drying into set lengths. In order to facilitate slitting the extruded matrix 200 after negative pressure drying, please refer to Figures 2 and 3. The manufacturing equipment 100 can also be provided with a second conveying device 160 between the vacuum drying device 120 and the second slitting device 150. The extruded matrix 200 that has completed negative pressure drying in the vacuum drying device 120 is conveyed to the second slitting device 150 by the second conveying device 160 for slitting.

The texture of the extruded matrix extruded by room temperature extrusion molding is usually relatively soft. Therefore, before the extruded matrix is subjected to negative pressure drying, pre-slitting of the extruded matrix is equivalent to slitting the soft body of the extruded matrix.

After the pre-cut extruded matrix is dried under negative pressure, the moisture in the extruded matrix is removed and the extruded matrix hardens. Therefore, after the negative pressure drying, the cutting of the pre-cut extruded matrix is equivalent to cutting of the extruded matrix with a relatively hard texture.

During the negative pressure drying process of the extruded matrix, the volume of the extruded matrix will shrink. Therefore, the pre-slitting-negative pressure drying-slitting method can improve the consistency of the longitudinal dimension (i.e., the dimension along the extrusion direction) of the extruded matrix after cutting, thereby improving the slitting yield.

In addition, for an extruded matrix that needs to be pre-cut, the extruded matrix can also be shaped after the pre-cut.

For example, after the extruded matrix is pre-cut, a jig may be used to circumferentially align the extruded matrix, and then the shaped extruded matrix may be dried under negative pressure.

For example, after the extruded matrix is dried under negative pressure and before the extruded matrix is cut into set lengths, a jig may be used to calibrate the circumference and straightness of the extruded matrix.

In one embodiment, the extruded matrix can also be cut into set lengths after the extruded matrix is dried under negative pressure. That is, the extruded matrix is first dried under negative pressure and then cut into set lengths. Compared with the manufacturing method with pre-cutting, this embodiment actually omits the pre-cutting step.

For example, taking the manufacturing device 100 shown in FIG. 2 as an example, for the manufacturing method of this embodiment, Only one slitting device 150 may be provided downstream of the vacuum drying device 120 along the material conveying direction, while no slitting device 150 may be provided upstream of the vacuum drying device 120 along the material conveying direction. No slitting is performed on the extruded matrix 200 before the negative pressure drying. After the extruded matrix 200 is subjected to negative pressure drying, the slitting device 150 is used to cut the extruded matrix 200 into set lengths.

The texture of the extruded matrix extruded by room temperature extrusion molding is usually relatively soft. Therefore, the extruded matrix is first subjected to negative pressure drying and then cut to prevent the cutting before negative pressure drying from causing slight deformation to the extruded matrix with lower hardness.

It should be noted that, for any slitting method without pre-slitting, a jig can also be used to calibrate the circumference and straightness of the extruded matrix before slitting.

In some embodiments, there may be no slitting step, that is, the extruded matrix of a set length can be directly extruded by room temperature extrusion molding. For example, after the extruded matrix is extruded by vertical extrusion, the extruded matrix can naturally detach under the action of its own gravity when it reaches or approaches the set length, thereby reducing the subsequent slitting steps and further reducing the production cost.

In one embodiment, before the extruded matrix is subjected to negative pressure drying, the manufacturing method further comprises: cooling and hardening the extruded matrix.

Since the texture of the extruded matrix extruded by room temperature extrusion molding is usually relatively soft, in order to facilitate subsequent processing, the extruded matrix can be cooled and hardened before negative pressure drying to increase the hardness of the extruded matrix.

After cooling and hardening, the hardness of the extruded matrix increases and the temperature of the extruded matrix decreases.

For example, the hardness of the extruded matrix extruded by room temperature extrusion molding before cooling and hardening may be 0HB to 100HB (including 0HB and 100HB), and after cooling and hardening, the hardness of the extruded matrix may be 1HB to 200HB (including 1HB and 200HB).

Preferably, the hardness of the extruded matrix extruded by room temperature extrusion molding before cooling and hardening can be 1HB to 60HB (including 1HB and 60HB), and after cooling and hardening, the hardness of the extruded matrix can be 40HB to 120HB (including 40HB and 120HB).

For example, the temperature of the extruded matrix before cooling and hardening may be 0°C to 40°C (including 0°C and 40°C), and the temperature of the extruded matrix after cooling and hardening may be -50°C to 5°C (including -50°C and 5℃).

For the manufacturing method having the slitting step, the extruded matrix may be slit into set lengths after the extruded matrix is cooled and hardened.

Exemplarily, referring to Fig. 2 and Fig. 3, the manufacturing equipment 100 can be provided with a hardening device 130 and two slitting devices 150. The hardening device 130 is arranged between the extruder 110 and the vacuum drying device 120, so as to cool and harden the extruded matrix 200 before negative pressure drying. One of the two slitting devices 150 is arranged between the hardening device 130 and the vacuum drying device 120, so as to pre-slit the extruded matrix 200 after cooling and hardening before negative pressure drying. The other of the two slitting devices 150 is arranged downstream of the vacuum drying device 120 along the material conveying direction, so as to cut the extruded matrix 200 after negative pressure drying into set lengths.

For example, referring to Figures 4 and 5, the manufacturing equipment 100 may also only set the slitting device 150 between the hardening device 130 and the vacuum drying device 120, and no slitting device 150 is set downstream of the vacuum drying device 120 along the material conveying direction. The slitting device 150 set between the hardening device 130 and the vacuum drying device 120 is used to cut the cooled and hardened extruded matrix 200 into set lengths before negative pressure drying. That is to say, after the extruded matrix 200 is cooled and hardened, it can be directly cut into set lengths without pre-cutting.

Since the hardness of the extruded matrix increases after cooling and hardening, the extruded matrix is easier to cut after cooling and hardening, and the extruded matrix after cutting will not be deformed, and the cut surface is more neat and complete.

In one embodiment, the cooling and hardening may be placing the extruded matrix in a low-temperature environment for cooling, wherein the temperature of the low-temperature environment is lower than the hardening temperature of the extruded matrix.

The temperature of the low-temperature environment refers to the ambient temperature within a device that provides the low-temperature environment.

That is, the extruded matrix can be transferred to a low-temperature environment with a relatively low temperature for cooling. In order to meet the hardening requirements, the temperature in the low-temperature environment needs to be lower than the hardening temperature of the extruded matrix.

Exemplarily, under the premise that the temperature in the low-temperature environment is lower than the hardening temperature of the extruded matrix, if the hardening temperature of the extruded matrix is -100°C to 60°C (including -100°C and 60°C), the temperature of the low-temperature environment can be -270°C to 60°C (including -270°C and 60°C).

More preferably, if the hardening temperature of the extruded matrix is -30°C to 40°C (inclusive), the temperature of the low temperature environment may be -100°C to 40°C (inclusive).

In one embodiment, the cooling and hardening may also be performed by cooling the extruded matrix using a refrigerant. The refrigerant may be in the form of a liquid, such as liquid nitrogen or liquefied air, or a gas or a solid.

For example, the extruded substrate may be directly heat exchanged with a refrigerant.

Direct heat exchange refers to heat exchange between heat exchange media through direct contact. That is, the extruded matrix is in direct contact with the refrigerant. For example, referring to Figures 10 and 11, the hardening device 130 can be provided with a refrigerant supplier (not shown) and a container 131 having a receiving chamber 131a, the receiving chamber 131a having a transmission channel 131c running through opposite sides of the container 131 and a liquid inlet 131b connected to the receiving chamber 131a, the extruded matrix 200 extruded from the extruder 110 enters the receiving chamber 131a through the transmission channel 131c, the refrigerant supplier injects the liquid refrigerant into the liquid inlet 131b, the refrigerant enters the receiving chamber 131a through the liquid inlet 131b and contacts with the extruded matrix 200 in the receiving chamber 131a for heat exchange.

In addition, please refer to Figures 10 and 11. When the extrusion die 113 can extrude multiple extrusion matrices 200 at the same time, since the hardness of the extrusion matrix 200 just extruded is relatively low, in order to prevent the multiple extrusion matrices 200 from sticking together, a first conveying device 140 having multiple guide grooves 140a can be provided outside the die mouth of the extrusion die 113. The first conveying device 140 passes through the conveying channel 131c to guide each extrusion matrix 200 through the conveying channel 131c into the accommodating cavity 131a for cooling and hardening.

The advantage of direct heat exchange between the extruded matrix and the refrigerant is that the surface of the hardened heat exchange medium can be cooled more quickly so that the extruded matrix can maintain the stability of the shape, thereby facilitating continuous production and improving production efficiency. For example, the extruded matrix can also be indirectly heat exchanged with the refrigerant.

Indirect heat exchange means that the heat exchange media are not in direct contact with each other during the heat exchange process. That is to say, the extruded matrix and the refrigerant will not be in direct contact, but will be indirectly heat exchanged through an intermediate piece. For example, referring to FIG. 12 , the hardening device 130 may include a cooling tube 132, and the cooling tube 132 includes an inner tube 1321 and an outer tube 1322. A liquid storage chamber 132a for storing the refrigerant is formed between the inner tube 1321 and the outer tube 1322. The inner tube 1321 has a heat exchange channel 1321a extending therethrough. The extruded matrix 200 extruded from the extruder 110 enters the heat exchange channel 1321a and contacts the inner tube 1321 for heat exchange. The inner tube 1321 that absorbs the heat of the extruded matrix 200 then exchanges heat with the refrigerant, which is equivalent to indirect heat exchange between the extruded matrix 200 and the refrigerant through the inner tube 1321. Heat exchange.

It should be noted that the inner surface of the inner tube 1321 forming the heat exchange channel 1321a is generally a smooth surface. For example, the roughness of the inner surface of the inner tube 1321 can be Ra1.2μm~Ra0.08μm (including Ra1.2μm and Ra0.08μm). The friction between the smooth inner surface and the outer surface of the extruded matrix 200 is small, and will not cause deformation of the extruded matrix 200.

The advantage of indirect heat exchange between the extruded matrix and the refrigerant is that it can effectively avoid problems such as expansion deformation, cracking, etc. that may occur when the extruded matrix directly contacts the refrigerant.

In some embodiments, there may be no cooling and hardening step. For example, in a manufacturing method, after the extruded matrix is extruded, before the negative pressure drying, only slitting may be performed without cooling and hardening. For an extruded matrix with a relatively short set length, the slight deformation caused by slitting has no effect on subsequent production, and therefore, the cooling and hardening step may be omitted.

In one embodiment, the components of the mixed material include solid material and liquid material. Before the mixed material is subjected to room temperature extrusion molding, the manufacturing method may further include: dividing the solid material and the liquid material into two modules and feeding them separately.

Solid material refers to solid material, and liquid material refers to liquid material. That is to say, part of the components in the mixed material are solid, and part of the components are liquid. The solid material and the liquid material are mixed to form a mixed material.

It should be noted that the mixed material formed after the solid material and the liquid material are mixed is in a uniform form and can no longer be divided into solid material and liquid material.

For example, taking plant raw materials, auxiliary raw materials and adhesive raw materials as solid materials and smoke agent raw materials and flavor raw materials as liquid materials, the solid materials such as plant raw materials, auxiliary raw materials and adhesive raw materials and the liquid materials such as smoke agent raw materials and flavor raw materials can be added into the barrel of the extruder respectively, so that the solid materials and the liquid materials are mixed in the barrel of the extruder.

The advantage of dividing the solid material and liquid material into two modules for feeding separately is that it can reduce the pre-treatment cost of the mixed material, ensure the continuity of the production process, and improve the consistency and uniformity of the product while improving production efficiency.

Furthermore, dividing the solid material and the liquid material into two modules for feeding separately may include the following steps: adding the solid material; when the solid material moves along the material conveying direction to the liquid material adding position, adding the liquid material to the solid material.

That is to say, solid material is first added to the extruder. After the solid material enters the barrel of the extruder, it will move along the material conveying direction toward the direction of the extrusion die. When the solid material moves along the material conveying direction to the liquid material adding position, liquid material is added to the extruder to mix the liquid material and the solid material in the barrel of the extruder.

In addition, the feeding amount and feeding speed can be determined according to the production speed of the extruder and the ratio of each raw material in the mixed material.

Exemplarily, referring to FIG. 2 to FIG. 5 , a solid material feeding port 114 and a liquid material feeding port 115 connected to the barrel 111 of the extruder 110 may be provided on the extruder 110 , and the liquid material feeding port 115 is located downstream of the solid material feeding port 114 along the material conveying direction.

The number of the solid material feeding ports 114 may be one or more. When a plurality of solid material feeding ports 114 are provided, each solid material feeding port 114 may be used to add the same solid material or different solid materials.

Similarly, the number of the liquid material feeding ports 115 may be one or more. When multiple liquid material feeding ports 115 are provided, each liquid material feeding port 115 may be used to add the same liquid material or different liquid materials.

In addition, whether it is a plurality of solid material feeding ports 114 or a plurality of liquid material feeding ports 115, they can be arranged into a detachable structure so as to facilitate the assembly of the solid material feeding ports 114 and the liquid material feeding ports 115 according to the required number.

Since the extruder mainly relies on the rotation of the screw to convey the mixed material, and the screw and the inner wall of the extruder barrel are not completely sealed, that is, there is a gap between the screw and the inner wall of the extruder barrel. If the liquid material is added first, the liquid material will easily leak from the gap. Therefore, adding the solid material first, and then adding the liquid material when the solid material moves along the material conveying direction to the liquid material adding position, can better avoid liquid leakage.

In some embodiments, the mixed material may not be fed separately as a solid material and a liquid material. For example, the solid material and the liquid material may be mixed first to form a mixed material (referred to as mixed slurry feeding), and then the mixed material is added to the barrel of the extruder.

The advantage of mixed slurry feeding is that the mixed material has better consistency, which can ensure the uniformity and stability of the product.

In addition, please refer to Figures 3 and 5. For mixed slurry feeding, the feed port (using mixed slurry feeding) When the solid material feeding port 114 in FIG. 3 and FIG. 5 is equivalent to the feeding port), a screw 112 may be further provided at the feeding port to further homogenize the mixed slurry.

In one embodiment, after the extruded matrix is subjected to negative pressure drying, the manufacturing method may further include: wrapping a packaging layer on the outer surface of the extruded matrix.

The packaging layer includes but is not limited to medium consumables such as cigarette paper, paper tubes, and tin foil. The extruded matrix wrapped with the packaging layer is equivalent to the finished product of the aerosol generating matrix.

In some embodiments, the extruded matrix wrapped with the packaging layer may also be combined with other functional segments, such as a cooling segment, a filtering segment, etc., to form an aerosol generating product.

In another embodiment, after the extruded matrix is dried under negative pressure, the manufacturing method may further include: sealing and packaging the extruded matrix.

That is to say, instead of wrapping the outer surface of the extruded matrix with a packaging layer, the extruded matrix can be directly sealed and packaged, for example, the extruded matrix can be encapsulated in a blister packaging container. The sealed and packaged extruded matrix is also equivalent to a finished product of the aerosol-generating matrix. The sealed and packaged extruded matrix can be directly used on the electronic atomization device after removing the packaging.

The following are several feasible manufacturing methods of the present application respectively described by different embodiments. It should be noted that the following embodiments are mainly for illustrating the differences between several feasible manufacturing methods, and the specific method of each step in each embodiment is the same as that in the previous embodiment, which will not be repeated here.

Embodiment 1

Please refer to FIG. 16 , the manufacturing method of the first embodiment mainly includes the following steps:

Step S01a: feeding;

Step S02a: extrusion molding at room temperature;

Step S03a: cooling and hardening;

Step S04a: cutting;

Step S05a: negative pressure drying;

Step S06a: Packaging.

Embodiment 2

Please refer to FIG. 17 , the manufacturing method of the second embodiment mainly includes the following steps:

Step S01b: feeding;

Step S02b: extrusion molding at room temperature;

Step S03b: cutting;

Step S04b: negative pressure drying;

Step S05b: Packaging.

Compared with the manufacturing method of the first embodiment, the manufacturing method of the second embodiment does not have a cooling and hardening step.

Embodiment 3

Please refer to FIG. 18 , the manufacturing method of the third embodiment mainly includes the following steps:

Step S01c: feeding;

Step S02c: extrusion molding at room temperature;

Step S03c: pre-cutting;

Step S04c: negative pressure drying;

Step S05c: cutting;

Step S06c: Packaging.

Compared with the manufacturing method of the first embodiment, the manufacturing method of the third embodiment does not have a cooling and hardening step, and the slitting in the third embodiment includes pre-slitting before negative pressure drying and slitting after negative pressure drying.

Embodiment 4

Please refer to FIG. 19 , the manufacturing method of the fourth embodiment mainly includes the following steps:

Step S01d: feeding;

Step S02d: extrusion molding at room temperature;

Step S03d: negative pressure drying;

Step S04d: Packaging.

Compared with the manufacturing method of the first embodiment, the manufacturing method of the fourth embodiment does not have the steps of cooling, hardening and slitting.

In the description of the present application, the reference terms "in one embodiment", "in some embodiments", "in other embodiments", "in yet other embodiments", or "exemplary" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment of the present application. or examples. In this application, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine different embodiments or examples described in this application and the features of different embodiments or examples without contradiction.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims (24)

A method for manufacturing an aerosol generating substrate, the method comprising: Extruding the mixed material at room temperature to form an extrusion matrix; The extruded matrix is dried under negative pressure in a vacuum environment. According to the manufacturing method of claim 1, the extrusion temperature of the room temperature extrusion molding is 10°C to 90°C; and/or, The temperature of the vacuum environment is greater than 20° C. and less than 100° C.; and/or, The absolute pressure of the vacuum environment is 0 kPa to 101.325 kPa; and/or, The extrusion pressure of the room temperature extrusion molding is 0.5 bar to 300 bar. The manufacturing method according to claim 2, wherein the extrusion temperature is 35°C to 70°C; and/or, The absolute pressure is 4 kPa to 20 kPa; and/or, The extrusion pressure is 20 bar to 80 bar. According to the manufacturing method according to any one of claims 1 to 3, the extrusion method of the room temperature extrusion molding is one of horizontal extrusion, vertical extrusion and inclined extrusion. According to any one of claims 1 to 3, the extruded matrix is subjected to negative pressure drying, comprising: The extruded matrix is dried under negative pressure by using at least one heating method selected from microwave heating, resistance heating and infrared heating. The manufacturing method according to any one of claims 1 to 3, further comprising: The extruded matrix is slit into set lengths. The manufacturing method according to claim 6, wherein the step of slitting the extruded matrix into set lengths comprises: Before the extruded matrix is subjected to the negative pressure drying, the extruded matrix is cut into said set length; or, Before the extruded matrix is subjected to the negative pressure drying, the extruded matrix is pre-cut, and after the extruded matrix is subjected to the negative pressure drying, the pre-cut extruded matrix is cut into the set length. According to the manufacturing method of claim 6, the slitting method is physical contact slitting in which the slitting tool is in contact with the extruded matrix; or, the slitting method is non-physical contact slitting in which the slitting tool is spaced from the extruded matrix. According to any one of claims 1 to 3, before the extruded matrix is subjected to the negative pressure drying, the manufacturing method further comprises: The extruded matrix is cooled and hardened. The manufacturing method according to claim 9, wherein the step of cooling and hardening the extruded matrix comprises: The extruded matrix is placed in a low temperature environment for cooling, wherein the temperature of the low temperature environment is lower than the hardening temperature of the extruded matrix. According to the manufacturing method of claim 10, the hardening temperature is -100°C to 60°C, and the temperature of the low-temperature environment is -270°C to 60°C. The manufacturing method according to claim 9, wherein the step of cooling and hardening the extruded matrix comprises: The extruded matrix is directly heat exchanged with a refrigerant; or, the extruded matrix is indirectly heat exchanged with a refrigerant. According to the manufacturing method of claim 9, after hardening the extruded matrix, the manufacturing method further comprises: The extruded matrix is slit into set lengths. According to the manufacturing method of claim 9, the hardness of the extruded matrix after cooling and hardening is 1HB to 200HB; and/or, The temperature of the extruded matrix after the cooling and hardening is -50°C to 5°C. According to the manufacturing method according to any one of claims 1 to 3, the hardness of the extruded matrix after the negative pressure drying is 40HB to 300HB. According to the manufacturing method according to any one of claims 1 to 3, the water content of the extruded matrix after the negative pressure drying is 3% to 20% of the total weight of the extruded matrix. According to the manufacturing method according to any one of claims 1 to 3, the components of the mixed material include a solid material and a liquid material, and before the mixed material is subjected to room temperature extrusion molding, the manufacturing method further includes: The solid material and the liquid material are divided into two modules for feeding respectively. According to the manufacturing method of claim 17, the step of dividing the solid material and the liquid material into two modules for feeding respectively comprises: adding the solid material; When the solid material moves along the material conveying direction to the adding position of the liquid material, the liquid material is added to the solid material. According to any one of claims 1 to 3, after the extruded matrix is subjected to negative pressure drying, the manufacturing method further comprises: A packaging layer is wrapped on the outer surface of the extruded matrix; or the extruded matrix is sealed and packaged. According to the manufacturing method according to any one of claims 1 to 3, in 100 parts by weight of the mixed material, the plant raw material is 30 to 90 parts, the auxiliary raw material is 1 to 15 parts, the smoke agent raw material is 5 to 30 parts, the adhesive raw material is 1 to 10 parts, and the fragrance raw material is 1 to 15 parts. A manufacturing device for an aerosol generating substrate, comprising: An extruder, the extruder is used to perform room temperature extrusion molding on the mixed material so that the mixed material forms an extrusion matrix; A vacuum drying device is used to perform negative pressure drying on the extruded matrix. According to the manufacturing equipment according to claim 21, the extrusion die of the extruder is a single-mode single-mouth die having a bottom die, and the discharge end of the bottom die has a mouth die; or, The extrusion die of the extruder is a single-die multi-die having a bottom die, and a discharge end of the bottom die having a plurality of die openings; or, The extrusion die of the extruder is a multi-mouth die having a plurality of bottom dies, and the discharge end of each bottom die has a plurality of mouth dies. The manufacturing apparatus according to claim 21, further comprising a hardening device and two slitting devices; The hardening device is disposed between the extruder and the vacuum drying device to cool and harden the extruded matrix before the negative pressure drying; One of the two slitting devices is arranged between the hardening device and the vacuum drying device, so as to pre-slit the extruded matrix that has undergone the cooling and hardening before the negative pressure drying; the other of the two slitting devices is arranged downstream of the vacuum drying device along the material conveying direction, so as to cut the extruded matrix that has undergone the negative pressure drying into set lengths. The manufacturing equipment according to claim 21, further comprising a hardening device and a slitting device; The hardening device is disposed between the extruder and the vacuum drying device to cool and harden the extruded matrix before the negative pressure drying; The slitting device is disposed between the hardening device and the vacuum drying device, and is used to slit the extruded matrix that has been cooled and hardened into a set length before the negative pressure drying is performed.