Processing device for cooling element, preparation method and cigarette rod processing system

Abstract

The present application provides a processing device for a cooling element, a preparation method, and a cigarette rod processing system. The processing device for the cooling element includes a temperature-reducing material pretreatment unit and a composite forming unit. The temperature-reducing material pretreatment unit is used for pretreating the temperature-reducing material, and the composite forming unit is used for compounding the tow into a layered structure and forming. The cigarette rod processing system includes the processing device for the cooling element. The preparation method for the cooling element includes: respectively pretreating at least one group of acetate fiber tows and at least one group of polylactic acid fiber tows, and then through splicing and extrusion compounding, forming a layered temperature-reducing material including at least one layer of acetate fiber layer and at least one layer of polylactic acid fiber layer, and then rolling it into a column to obtain the cooling element. The processing device and the preparation method for the cooling element provided by the present application can prepare a cooling element with stable structure and good temperature-reducing effect.

Description

Technical Field

[0001] The present application relates to the field of heat-not-burn cigarette sticks, and particularly to a processing device, a preparation method and a cigarette stick processing system for a cooling element. Background Art

[0002] Heat-not-burn cigarettes are one of the emerging tobacco products, generally composed of at least an aerosol generating element and a filter element. If the smoke generated by heating the aerosol generating element only passes through the filter element, its temperature drops limitedly. After reaching the consumer's oral cavity, there will be a burning feeling, resulting in a decline in the consumer's smoking experience. Therefore, generally, a cooling element will be added to the cigarette stick structure.

[0003] In the prior art, the shapes, materials, processing methods and installation positions of the cooling elements in the cigarette sticks are different. For example, the commonly used cooling elements are generally formed by pressing with a mold. Although this method has a simple processing technology, the simple structure of the cooling element results in poor cooling effect, a burning feeling when the consumer smokes, and a poor smoking experience. Summary of the Invention

[0004] The purpose of the present application is to provide a processing device, a preparation method and a cigarette stick processing system for a cooling element to solve the above problems.

[0005] To achieve the above purpose, the present application adopts the following technical solutions:

[0006] A processing device for a cooling element includes a cooling material pretreatment unit and a composite forming unit. The cooling material pretreatment unit is used for pretreating the filamentous cooling material, and the composite forming unit is used for compounding the pretreated filamentous cooling material into a layered structure and forming it;

[0007] The composite forming unit includes a splicing roller, an extrusion roller and a forming cigarette gun arranged in sequence. The splicing roller is used for splicing multiple groups of filamentous cooling materials into a layered cooling material, the extrusion roller is used for pressurizing and compounding the layered cooling material, and the forming cigarette gun is used for forming the pressurized and compounded layered cooling material to obtain the cooling element; the air blower is used for blowing loose the filamentous cooling material, the pre-tensioning roller is used for stretching the blown loose filamentous cooling material, the thread roller is used for loosening the stretched filamentous cooling material, the plasticizer spray adding tank is used for adding plasticizer to the loosened filamentous cooling material, and the conveying roller is used for feeding the filamentous cooling material added with plasticizer into the composite forming unit.

[0008] Preferably, each group of the thread rollers includes a first thread roller and a second thread roller arranged in sequence, and the splicing roller and the extrusion roller are independently arranged in pairs and parallel to each other.

[0009] Preferably, a width limiting component is arranged between the cooling material pretreatment unit and the splicing roller.

[0010] Preferably, a high-pressure wire catcher is arranged between the extrusion roller and the forming cigarette gun, and the high-pressure wire catcher is used for catching the layered cooling material and feeding it into the forming cigarette gun.

[0011] The present application also provides a preparation method of a cooling element, including:

[0012] After at least one group of acetate fiber tow and at least one group of polylactic acid fiber tow are respectively pretreated, they are spliced and extrusion-compounded to form a layered cooling material including at least one layer of acetate fiber layer and at least one layer of polylactic acid fiber layer, and then rolled into a column to obtain the cooling element.

[0013] Preferably, the running speed of the tow is 60-80 m / min; the ratio of the running speed of the forming cigarette gun to the linear speed of the extrusion roller is 1:(1-1.1).

[0014] Preferably, the pressure of the extrusion roller is 0.05-0.35 MPa;

[0015] Preferably, the steam pressure of the forming cigarette gun is 0.3-0.6 MPa;

[0016] Preferably, the cooling material pretreatment unit includes a conveying roller, and the ratio of the linear speed of the extrusion roller to the linear speed of the conveying roller is 1:(1.1-1.3).

[0017] The present application also provides a cigarette rod processing system, including the processing device of the cooling element described above.

[0018] Compared with the prior art, the beneficial effects of the present application include:

[0019] The processing device of the cooling element and the cigarette rod processing system provided by the present application splice and extrude the tow-shaped cooling material processed by the cooling material pretreatment unit together through the splicing roller and the extrusion roller to form a basic layered structure, and then form it in the forming cigarette gun to obtain a cooling element with a layered structure for cigarette rods; the device has a simple structure, and the obtained cooling element with a layered structure has a stable structure and good cooling effect; thus, it greatly reduces the burning sensation when consumers smoke cigarette rods and has a good user experience.

[0020] The preparation method of the cooling element provided by the present application composites at least one group of acetate fiber tow and at least one group of polylactic acid fiber tow respectively after pretreatment under the action of splicing and extrusion, and then rolls them into a column to finally obtain the cooling element; the cooling element has a stable structure, does not require additional support elements, and has a good cooling and temperature reduction effect. Description of the Drawings

[0021] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope of the present application.

[0022] Figure 1 Cross-sectional schematic diagram of the cooling element processed in the embodiment of the present application;

[0023] Figure 2 Schematic diagram of the processing device for the cooling element provided in Embodiment 1;

[0024] Figure 3 Schematic diagram of the processing device for the cooling element provided in Embodiment 2;

[0025] Figure 4 Schematic diagram of the processing device for the cooling element provided in Embodiment 3;

[0026] Figure 5 Schematic diagram of the non-closed inner layer state of the unqualified cooling element;

[0027] Figure 6 Schematic diagram of the non-closed outer layer state of the unqualified cooling element;

[0028] Figure 7 Schematic diagram of the state of uneven material density distribution of the unqualified cooling element.

[0029] Reference numerals:

[0030] 1 - Cooling material pretreatment unit;

[0031] 10 - Air blower; 11 - Pre-tensioning roller; 12 - Threaded roller; 13 - Plasticizer spray addition tank; 14 - Conveyor roller;

[0032] 2 - Composite molding unit;

[0033] 20 - Splicing roller; 21 - Extrusion roller; 22 - Forming cigarette gun; 23 - Width limiting component; 24 - High-pressure fiber catcher. Detailed implementation manners

[0034] As used herein, the term:

[0035] "Prepared from" is synonymous with "comprising". As used herein, the terms "comprising", "including", "having", "containing" or any other variation thereof are intended to cover non-exclusive inclusion. For example, a composition, step, method, article or device containing the listed elements is not necessarily limited to those elements, but may include other elements not explicitly listed or elements inherent to such composition, step, method, article or device.

[0036] The conjunctive term "consisting of" excludes any element, step, or component not specified. If used in a claim, this phrase will render the claim closed-ended, excluding materials other than those described, except for conventional impurities associated therewith. When the phrase "consisting of" appears in a clause within the body of a claim rather than immediately following the subject, it only limits the elements described in that clause; other elements are not excluded from the claim as a whole.

[0037] When an equivalent, concentration, or other value or parameter is expressed as a range, a preferred range, or a range defined by a series of upper preferred values and lower preferred values, this should be understood to specifically disclose all ranges formed by any pairing of any range upper limit or preferred value with any range lower limit or preferred value, whether or not that range is separately disclosed. For example, when the range "1 to 5" is disclosed, the described range should be interpreted to include ranges "1 to 4", "1 to 3", "1 to 2", "1 to 2 and 4 to 5", "1 to 3 and 5", etc. When a numerical range is described herein, unless otherwise stated, the range is intended to include its end values and all integers and fractions within that range.

[0038] In these embodiments, unless otherwise specified, the parts and percentages are by mass.

[0039] "Parts by mass" refers to the basic measurement unit representing the mass ratio relationship of multiple components. 1 part can represent any unit mass, such as 1 g or 2.689 g, etc. If we say that the mass parts of component A is a parts and the mass parts of component B is b parts, it means the mass ratio of component A to component B is a:b. Or it means the mass of component A is aK and the mass of component B is bK (K is any number representing a multiple factor). It should not be misunderstood that, different from the number of mass parts, the sum of the mass parts of all components is not limited to 100 parts.

[0040] "And / or" is used to indicate that either or both of the stated circumstances may occur. For example, A and / or B includes (A and B) and (A or B).

[0041] A processing device for a cooling element, comprising a pre-treatment unit for the temperature-reducing material and a composite forming unit. The pre-treatment unit for the temperature-reducing material is used to pre-treat the filamentous temperature-reducing material, and the composite forming unit is used to composite the pre-treated filamentous temperature-reducing material into a layered structure and form it;

[0042] The composite forming unit includes a splicing roller, an extrusion roller, and a forming cigarette gun arranged in sequence. The splicing roller is used to splice multiple groups of tow-shaped cooling materials into a layered cooling material. The extrusion roller is used to press and compound the layered cooling material. The forming cigarette gun is used to form the pressed and compounded layered cooling material to obtain the cooling element.

[0043] In an alternative embodiment, the cooling material pretreatment unit includes at least two groups of an air blowing device, a pre-tensioning roller, a thread roller, a plasticizer spraying and adding tank, and a conveying roller arranged in sequence. The air blowing device is used to blow loose the tow-shaped cooling material. The pre-tensioning roller is used to stretch the blown loose tow-shaped cooling material. The thread roller is used to loosen the stretched tow-shaped cooling material. The plasticizer spraying and adding tank is used to add a plasticizer to the loosened tow-shaped cooling material. The conveying roller is used to feed the tow-shaped cooling material added with the plasticizer into the composite forming unit.

[0044] In an alternative embodiment, each group of the thread rollers includes a first thread roller and a second thread roller arranged in sequence.

[0045] In an alternative embodiment, a width limiting component is arranged between the cooling material pretreatment unit and the splicing roller.

[0046] In an alternative embodiment, the splicing roller and the extrusion roller are each independently arranged in pairs and parallel to each other.

[0047] In an alternative embodiment, a high-pressure filament catcher is arranged between the extrusion roller and the forming cigarette gun. The high-pressure filament catcher is used to capture the layered cooling material and feed it into the forming cigarette gun.

[0048] This application also provides a cigarette rod processing system, including the processing device for the cooling element described above.

[0049] This application also provides a preparation method for the cooling element, which is prepared using the processing device for the cooling element described above. The preparation method includes:

[0050] After at least one group of acetate fiber tow and at least one group of polylactic acid fiber tow are respectively pretreated by the cooling material pretreatment unit, they enter the composite forming unit;

[0051] Then, they are spliced by the splicing roller and extruded and compounded by the extrusion roller to form a layered cooling material including at least one layer of acetate fiber layer and at least one layer of polylactic acid fiber layer, and then formed in the forming cigarette gun to obtain the cooling element.

[0052] In an alternative embodiment, the running speed of the tow is 60 - 80 m / min;

[0053] In an alternative embodiment, the pressure of the extrusion roller is 0.05 - 0.35 MPa;

[0054] In an alternative embodiment, the steam pressure of the forming cigarette gun is 0.3 - 0.6 MPa;

[0055] In an alternative embodiment, the ratio of the running speed of the forming cigarette gun to the linear speed of the extrusion roller is 1:(1 - 1.1).

[0056] Optionally, the running speed of the tow can be 60 m / min, 70 m / min, 80 m / min, or any value between 60 - 80 m / min; the pressure of the extrusion roller can be 0.05 MPa, 0.10 MPa, 0.15 MPa, 0.20 MPa, 0.25 MPa, 0.30 MPa, 0.35 MPa, or any value between 0.05 - 0.35 MPa; the steam pressure of the forming cigarette gun can be 0.3 MPa, 0.4 MPa, 0.5 MPa, 0.6 MPa, or any value between 0.3 - 0.6 MPa; the ratio of the running speed of the forming cigarette gun to the linear speed of the extrusion roller can be 1:1, 1:1.05, 1:1, or any value between 1:(1 - 1.1).

[0057] In an alternative embodiment, the cooling material pretreatment unit includes a conveying roller, and the ratio of the linear speed of the extrusion roller to the linear speed of the conveying roller is 1:(1.1 - 1.3).

[0058] Optionally, the ratio of the linear speed of the extrusion roller to the linear speed of the conveying roller can be 1:1.1, 1:1.2, 1:1.3, or any value between 1:(1.1 - 1.3).

[0059] The embodiments of the present application will be described in detail below in conjunction with specific examples. However, those skilled in the art will understand that the following examples are only used to illustrate the present application and should not be construed as limiting the scope of the present application. For those not specified in the examples, the operations are carried out under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments not specified by the manufacturer can be obtained as conventional products available on the market.

[0060] First, the target processing object of the processing device provided by the present application is described: The cooling element is integrally in a hollow cylindrical shape, and the column body adopts a double-layer or multi-layer structure. Taking the double-layer structure as an example, one layer is a cellulose acetate layer and the other layer is a polylactic acid layer (as Figure 1 shown).

[0061] Example 1

[0062] As Figure 2As shown in the figure, this embodiment provides a processing device for a cooling element, which is arranged in the order of the processing process and sequentially includes: a cooling material pretreatment unit 1 and a composite molding unit 2.

[0063] The cooling material pretreatment unit 1 is used to pretreat the polylactic acid fiber tow and the acetate fiber tow respectively, and the composite molding unit 2 is used to perform composite molding on the pretreated polylactic acid fiber tow and acetate fiber tow to obtain a cooling element of a layered cooling material with an acetate fiber layer and a polylactic acid fiber layer.

[0064] In a preferred embodiment, the cooling material pretreatment unit 1 includes a plurality of groups of air fluffers 10, pre-tension rollers 11, thread rollers 12, plasticizer spray addition tanks 13, and conveying rollers 14 arranged in sequence. The number of groups of each part in the cooling material pretreatment unit 1 is related to the number of layers of the cooling element. Within each group, the pre-tension rollers 11, thread rollers 12, plasticizer spray addition tanks 13, and conveying rollers 14 are each arranged in pairs. The composite molding unit 2 includes a splicing roller 20, an extrusion roller 21, and a forming cigarette gun 22 arranged in sequence.

[0065] This embodiment also provides a method for preparing a cooling element, including the following steps: The acetate fiber tow and the polylactic acid tow enter the pre-tension roller 11 to be straightened at a speed of 60 m / min respectively through the corresponding air fluffers 10, and are guided into the thread roller 12 for loosening. After the loosening is completed, they enter the plasticizer spray addition tank 13 to spray a plasticizer (such as glycerol, water-based glue, etc.), and then pass through the conveying roller 14 and complete the lamination and compounding under the continuous action of the splicing roller 20 and the extrusion roller 21 to form a layered cooling material with an acetate fiber layer and a polylactic acid fiber layer. Finally, it enters the forming cigarette gun 22 and is formed under the action of steam through a tow wrapping core mold; the pressure of the extrusion roller 21 is 0.05 MPa, the steam pressure of the forming cigarette gun 22 is 0.3 MPa, the ratio of the running speed of the forming cigarette gun 22 to the linear speed of the extrusion roller 21 is 1:1, and the ratio of the linear speed of the extrusion roller 21 to the linear speed of the conveying roller 14 is 1:1.1.

[0066] Embodiment 2

[0067] As Figure 3 As shown in the figure, this embodiment provides a processing device for a cooling element, which is arranged in the order of the processing process and sequentially includes: a cooling material pretreatment unit 1 and a composite molding unit 2.

[0068] The cooling material pretreatment unit 1 is used to pretreat the polylactic acid fiber tow and the acetate fiber tow respectively, and the composite molding unit 2 is used to perform composite molding on the pretreated polylactic acid fiber tow and acetate fiber tow to obtain a cooling element of a layered cooling material with an acetate fiber layer and a polylactic acid fiber layer.

[0069] In a preferred embodiment, the cooling material pretreatment unit 1 includes multiple groups of air blowing loosening devices 10, pre-drawing rollers 11, thread rollers 12, plasticizer spray addition tanks 13, and conveying rollers 14 arranged in sequence. The number of groups of each part in the cooling material pretreatment unit 1 is related to the number of layers of the cooling element; within each group, the pre-drawing rollers 11, thread rollers 12, plasticizer spray addition tanks 13, and conveying rollers 14 are each arranged in pairs. The conveying rollers 14 can be provided with multiple cooperating metal rollers in parallel as needed. In a preferred embodiment, in order to ensure the loosening effect, the thread rollers 12 are sequentially provided with two pairs.

[0070] The composite forming unit 2 includes a width limiting component 23, splicing rollers 20, extrusion rollers 21, and a forming cigarette gun 22 arranged in sequence. The width limiting component 23 is a group of slidable stainless steel metal rollers for limiting the width of the tow.

[0071] This embodiment also provides a method for preparing a cooling element, including the following steps: The acetate fiber tow and the polylactic acid fiber tow enter the pre-drawing rollers 11 respectively through the corresponding air blowing loosening devices 10 at a speed of 80 m / min, are straightened, and are guided into the thread rollers 12 for loosening. After the loosening is completed, they enter the plasticizer spray addition tank 13 to spray the plasticizer, and then pass through the conveying rollers 14 and are laminated and compounded under the continuous action of the splicing rollers 20 and the extrusion rollers 21 to form a layered cooling material with an acetate fiber layer and a polylactic acid fiber layer. Finally, they enter the forming cigarette gun 22 and are formed under the action of steam through the tow wrapping core mold; the pressure of the extrusion rollers 21 is 0.35 MPa, the steam pressure of the forming cigarette gun 22 is 0.6 MPa, the ratio of the running speed of the forming cigarette gun 22 to the linear speed of the extrusion rollers 21 is 1:1.1, and the ratio of the linear speed of the extrusion rollers 21 to the linear speed of the conveying rollers 14 is 1:1.3.

[0072] Example 3

[0073] As Figure 4 shown, this embodiment provides a processing device for a cooling element, which is arranged in the order of the processing process and sequentially includes: a cooling material pretreatment unit 1 and a composite forming unit 2.

[0074] The cooling material pretreatment unit 1 is used to pretreat the polylactic acid fiber tow and the acetate fiber tow respectively, and the composite forming unit 2 is used to compound and form the pretreated polylactic acid fiber tow and acetate fiber tow to obtain a cooling element of a layered cooling material with an acetate fiber layer and a polylactic acid fiber layer.

[0075] In a preferred embodiment, the cooling material pretreatment unit 1 includes multiple groups of air blowing loosening devices 10, pre-drawing rollers 11, threaded rollers 12, plasticizer spray addition tanks 13, and conveying rollers 14 arranged in sequence. The number of groups of each part in the cooling material pretreatment unit 1 is related to the number of layers of the cooling element; within each group, the pre-drawing rollers 11, threaded rollers 12, plasticizer spray addition tanks 13, and conveying rollers 14 are each arranged in pairs. Multiple mutually cooperating metal rollers can be arranged in parallel for the conveying rollers 14 as needed. In a preferred embodiment, two pairs of threaded rollers 12 are arranged in sequence to ensure the loosening effect.

[0076] The composite forming unit 2 includes a width limiting component 23, splicing rollers 20, extrusion rollers 21, and a forming cigarette gun 22 arranged in sequence. The width limiting component 23 is a group of slidable stainless steel metal rollers for limiting the width of the tow.

[0077] In order to enable the tow material after composite to enter the forming cigarette gun 22 better and more stably and ensure the smooth operation of the entire device, a high-pressure tow catcher 24 is arranged between the extrusion roller 21 and the forming cigarette gun 22.

[0078] This embodiment also provides a preparation method for the cooling element, including the following steps: The acetate fiber tow and the polylactic acid tow respectively enter the pre-drawing roller 11 through the corresponding air blowing loosening device 10 at a speed of 70 m / min to be straightened, and are guided into the threaded roller 12 for loosening. After the loosening is completed, they enter the plasticizer spray addition tank 13 to spray the plasticizer, and then after passing through the conveying roller 14, they complete the layer-by-layer composite under the continuous action of the splicing roller 20 and the extrusion roller 21 to form a layered cooling material with an acetate fiber layer and a polylactic acid fiber layer. Finally, they enter the forming cigarette gun 22 and are formed under the action of steam through the tow wrapping core mold; the pressure of the extrusion roller 21 is 0.15 MPa, the steam pressure of the forming cigarette gun 22 is 0.4 MPa, the ratio of the running speed of the forming cigarette gun 22 to the linear speed of the extrusion roller 21 is 1:1.05, and the ratio of the linear speed of the extrusion roller 21 to the linear speed of the conveying roller 14 is 1:1.2.

[0079] It should be noted that after forming, there are also post-treatment steps such as slitting.

[0080] Based on the above processing device for the cooling element, the present application also provides a heating non-combustible cigarette processing system. By integrating the processing device for the cooling element with the processing devices of other components (such as the aerosol generating element processing equipment, filter element processing equipment, cigarette assembling equipment, etc.), a complete set of automated processing system is obtained to improve the processing efficiency and reduce the production cost.

[0081] Comparative Example 1

[0082] Using pure acetate fiber (CA) as the cooling material, a cooling element with the same thickness and pore diameter as that in Example 1 is made.

[0083] Comparative Example 2

[0084] Use pure polylactic acid fiber (PLA) as the cooling material to make a cooling element with the same thickness and pore size as that in Example 1.

[0085] Process the cooling elements obtained in Example 1 and Comparative Examples 1-2 into heat-not-burn cigarettes, and then conduct lip-end temperature tests and collapse deformation tests.

[0086] For the lip-end temperature test, simulate smoking according to the cigarette suction model specified in the national standard GB / T19609-2004, and adopt the Canadian deep suction mode (HCI). The suction parameters are: suction volume 55 mL, suction frequency 30 s, and suction duration 2 s. Use a thermocouple temperature detector to detect the flue gas temperature value when sucking six puffs of the cigarette sample, where the temperature is at the center of the filter rod, 0 mm away from the mouth end.

[0087] The lip-end temperature test results are shown in Table 1:

[0088] Table 1 Lip-end Temperature Test Results

[0089]

[0090] Measure the circumferential change value during the suction process. "-" indicates a reduction in circumference. The results are shown in Table 2:

[0091] Table 2 Collapse Deformation Test Results

[0092]

[0093] As can be seen from Table 1 and Table 2 above, the heat-not-burn cigarettes prepared from the cooling element provided in Example 1 of the present application have obtained good stability (small deformation amount) while achieving a good cooling effect (low lip-end temperature). This is because the heat absorption performance of PLA is stronger than that of CA. The glass transition temperature of CA is 185 °C and the melting point is 310 °C; the glass transition temperature of PLA is 60 °C and the melting point is 160 °C; however, the thermal deformation amount of PLA is greater than that of CA. Therefore, it is difficult to achieve a balance between the cooling effect and stability by using either material alone.

[0094] Comparative Example 3

[0095] Compared with Example 2, the difference is that the width-limiting component 23 is not used, and other equipment and processes are the same.

[0096] Comparative Example 4

[0097] Compared with Example 2, the difference is that the extrusion roller 21 is not used, and other equipment and processes are the same.

[0098] By statistically analyzing the finished product rates of Example 2 and Comparative Examples 3 and 4, it can be seen that the average finished product rate of Example 2 is 80%, while the finished product rates of Comparative Example 3 and Comparative Example 4 are only 35% and 30% respectively. The process stabilities of Comparative Example 3 and Comparative Example 4 are relatively poor.

[0099] The specific reasons are as follows: Without using the width-limiting component 23, since the tow will swing left and right and the spread will fluctuate during the production process, the absence of the width-limiting component 23 will result in an unstable layered structure of the finished product. Without the extrusion roller 21, the two tows do not adhere to each other. After entering the cigarette rod, under the extrusion of the forming cigarette rod 22, the changes of the two tows are inconsistent, and it is difficult to obtain a stable layered structure.

[0100] The cross-sectional views of the unqualified products in Comparative Example 3 and Comparative Example 4 are as shown in Figure 5 、 Figure 6 and Figure 7 shown. Figure 5 It shows the state where the inner layer of the unqualified cooling element is not closed; Figure 6 It shows the state where the outer layer of the unqualified cooling element is not closed; Figure 7 It shows the state where the material density distribution of the unqualified cooling element is uneven.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0102] In addition, those skilled in the art can understand that although some of the embodiments herein include certain features included in other embodiments rather than other features, the combination of the features of different embodiments means that it is within the scope of the present application and forms different embodiments. For example, in the above claims, any one of the claimed embodiments can be used in any combination. The information disclosed in this background art section is only intended to deepen the understanding of the overall background art of the present application, and should not be regarded as an admission or any form of implication that this information constitutes the prior art known to those skilled in the art.

Claims

1. A processing device for a cooling element, characterized in that, it includes a cooling material pretreatment unit and a composite forming unit. The cooling material pretreatment unit is used to pretreat the tow-shaped cooling materials respectively, and the composite forming unit is used to composite the pretreated tow-shaped cooling materials into a layered structure and form them; the tow-shaped cooling materials are at least one group of acetate fiber tows and at least one group of polylactic acid fiber tows; the composite forming unit includes a splicing roller, a pressing roller and a forming gun arranged in sequence. The splicing roller is used to splice multiple groups of tow-shaped cooling materials into a layered cooling material, the pressing roller is used to press and composite the layered cooling material, and the forming gun is used to form the pressed and composite layered cooling material to obtain the cooling element; the cooling material pretreatment unit includes at least two groups of air loosening devices, pre-tensioning rollers, thread rollers, plasticizer spray addition tanks and conveying rollers arranged in sequence; the air blowing device is used to loosen the tow-shaped cooling materials, the pre-tensioning roller is used to stretch the loosened tow-shaped cooling materials, the thread roller is used to loosen the stretched tow-shaped cooling materials, the plasticizer spray addition tank is used to add plasticizer to the loosened tow-shaped cooling materials, and the conveying roller is used to send the tow-shaped cooling materials added with plasticizer into the composite forming unit.

2. The processing device according to claim 1, characterized in that, each group of the thread rollers includes a first thread roller and a second thread roller arranged in sequence, and the splicing roller and the pressing roller are independently arranged in pairs and in parallel.

3. The processing device according to claim 1, characterized in that, a width limiting component is arranged between the cooling material pretreatment unit and the splicing roller.

4. The processing device according to any one of claims 1-3, characterized in that, a high-pressure wire catcher is arranged between the pressing roller and the forming gun, and the high-pressure wire catcher is used to capture the layered cooling material and send it into the forming gun.

5. A preparation method for a cooling element, characterized in that, it is prepared by using the processing device for a cooling element according to any one of claims 1-4, and the preparation method includes: After at least one group of acetate fiber tows and at least one group of polylactic acid fiber tows are pretreated by the cooling material pretreatment unit respectively, they enter the composite forming unit; Then, they are spliced by the splicing roller and extruded and compounded by the pressing roller to form a layered cooling material including at least one layer of acetate fiber layer and at least one layer of polylactic acid fiber layer, and then are wound into a column shape in the forming gun to obtain the cooling element.

6. The preparation method according to claim 5, characterized in that, the running speed of the tow is 60-80 m / min; the ratio of the running speed of the forming gun to the linear speed of the pressing roller is 1:(1-1.1).

7. The preparation method according to claim 5, characterized in that, the pressure of the pressing roller is 0.05-0.35 MPa; the steam pressure of the forming gun is 0.3-0.6 MPa.

8. The preparation method according to any one of claims 5-7, characterized in that, The cooling material pretreatment unit includes a conveying roller, and the linear velocity ratio of the extrusion roller to the conveying roller is 1:(1.1 - 1.3).

9. A cigarette rod processing system characterized in that it includes a processing device for the cooling element described in any one of claims 1-4.

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