A method for rolling square cigars

Abstract

This invention relates to the field of cigar production and processing technology, and discloses a method for rolling square cigars. Existing cigar rolling methods require frequent tumbling to ensure even stress on the tobacco blank. Furthermore, insufficient tumbling or improper control of tumbling time can easily cause indentations. To solve the tumbling problem in the shaping process of cigar rolling, this invention provides a method that transforms "indentation" into a necessary appearance feature of cigars, shaping the tobacco blank into an edged shape, thus avoiding the tumbling problem. It also provides a corresponding shaping device that presses the cigar blank into a regular four-sided prism shape. This shaping device ensures even stress distribution when pressing the four-sided prism shape, preventing the formation of unnecessary indentations.

Description

Technical Field

[0001] This invention relates to the field of cigar production and processing technology, and in particular to a method for rolling square cigars. Background Technology

[0002] In recent years, the domestic cigar market has been expanding. With the increasing segmentation of the consumer market and the growing trend towards personalization, consumer demand for cigar products has become increasingly diversified. Uniquely shaped cigars, with their distinctive shapes, flavors, and packaging designs, can satisfy the preferences and needs of different consumers, enhancing brand image and product competitiveness. Square-shaped box-pressed cigars, as a unique cigar design, have become increasingly popular among cigar enthusiasts in recent years. Besides their aesthetic advantages, the square design also makes them less prone to rolling during transport, facilitating transportation and storage. However, the production process of square cigars is relatively complex, requiring special pressing techniques to achieve their regular shape.

[0003] A complete cigar consists of three parts from the inside out: the filler, the binder, and the wrapper. The cigar-making process involves first manually spiral-folding individual filler leaves into bundles. These bundles are then gathered and wrapped in the binder to form a cylindrical inner blank. The inner blank is then pressed into a specific size and shape using a shaping machine. After shaping, the inner blank has a smooth and uniform appearance. Finally, a wrapper is wrapped around the outer layer, completing the cigar rolling process. However, currently, shaping the inner blank requires multiple flippings to ensure a uniform appearance, but this flipping requires additional manual labor, resulting in low cigar production efficiency.

[0004] For example, patent application CN113679093A discloses a method for cigar rolling. The shaping process involves placing the cigar blank in a shaping mold and shaping it under external force for 2-3 days. During the shaping process, the mold is opened every 5 hours to flip the cigar blank. This patent has the following drawbacks: the cigars rolled using this method require flipping the cigar blank every 5 hours during shaping to ensure consistent pressure and a uniform appearance of the finished product. However, such frequent flipping increases labor costs and reduces production efficiency. Summary of the Invention

[0005] In the existing cigar rolling process, the pressing of the inner blank leaves indentations. In order to solve the above-mentioned technical problem, the present invention provides a method for rolling square cigars.

[0006] The specific technical solution of this invention is as follows:

[0007] This invention provides a method for rolling square cigars, comprising the following steps:

[0008] Step S1: Provide a shaping device:

[0009] The shaping device includes a mold cover, a mold base, and symmetrically arranged pressure strips. The mold base includes a tobacco blank shaping groove, which is formed by two sides with an included angle of not less than 90°. The mold cover includes a pressing groove. The pressure strips are disposed in the pressing groove. When the tobacco blank is pressed, the mold cover and the mold base are closed, and the symmetrically arranged pressure strips and the tobacco blank shaping groove form a space for accommodating the tobacco blank. The space is a quadrangular prism.

[0010] Step S2: Rolling the tobacco blanks;

[0011] Step S3: Tobacco blank shaping, wherein the shaping is performed using the shaping device provided in step S1, and the shaping method includes the following operations: placing the tobacco blank in the tobacco blank shaping groove, placing the symmetrically arranged pressure strips in the pressing groove, closing the mold cover with the mold base, and applying pressure for shaping.

[0012] The square cigar of the present invention, namely the cigar with a four-sided prism shape, is rolled and shaped through the above steps S1 to S3.

[0013] In existing cigar rolling methods, the problem of indentations is avoided by repeatedly turning the cigar during the pressing process. This invention addresses this issue by transforming "indentations" into an essential appearance feature of cigars, allowing the tobacco blank to be pressed and shaped into an edged blank, thus avoiding the turning problem. However, the key challenge of this invention lies in how to transform the locations prone to indentations during shaping into the four side edges of the cigar.

[0014] First, the present invention ensures that the included angle between the two sides of the tobacco blank shaping groove is not less than 90°, which has two implications: the included angle between the two sides means that two of the four side edges of the cigar are on the mating plane of the mold cover and the mold base, which is conducive to pressure balance and avoids the presence of other indentations besides the indentations at the side edges; the included angle of not less than 90° is conducive to pressure balance.

[0015] Secondly, the present invention, through the symmetrical arrangement of pressure strips, ensures uniform force on the tobacco blank in all directions, preventing deformation or excessive indentations caused by uneven force. If the mold pressing process only applies downward force, the tobacco blank will experience uneven force, resulting in severe deformation.

[0016] As a preferred embodiment of the above method, the upper cover of the mold is provided with a positioning protrusion, and the mold base is provided with a positioning cavity for accommodating the positioning protrusion.

[0017] After the mold top cover and mold base are closed, the positioning protrusion is embedded in the positioning cavity. Due to the positioning effect of the positioning protrusion and the positioning cavity, the pressure strip on the mold top cover is not easy to move during the pressing and shaping of the tobacco blank, which is conducive to the uniform pressing force.

[0018] Further preferably, the number of the positioning protrusions is at least 2.

[0019] In a further preferred embodiment, the number of positioning protrusions is 3, and they are disposed on both sides of the pressing protrusion.

[0020] As a preferred embodiment of the above method, the tobacco blank shaping groove is formed by two sides with an included angle of 90°. This results in a cigar with a regular square prism shape, which is more aesthetically pleasing.

[0021] As a preferred embodiment of the above method, the cross-sectional dimensions of the space are 0.2 to 0.4 mm smaller than the target dimensions of the tobacco blank.

[0022] As a preferred embodiment of the above method, the size of the tobacco blank obtained by rolling the tobacco blank is 2-3 mm larger than the cross-sectional size of the space.

[0023] In the above method of the present invention, the cross-sectional shape and size of the space refer to the shape and size of the tobacco blank after it has been shaped, which is also the size of the cigar's smoking end face or ignition end face. For the cigar with a square prism shape of the present invention, assuming that a target size of 1.5mm × 1.5mm is required for the cross-section of the regular square prism, it is preferable to set the space as a regular square prism with dimensions of (1.5mm - 0.2~0.4mm) × (1.5mm - 0.2~0.4mm). In step S2, when rolling the tobacco blank, the diameter of the rolled tobacco blank is the longest diameter of the cross-section of the space, plus 2~3mm. The reason for doing this is that, on the one hand, it ensures that the shaper acts on the tobacco blank to form a square prism; on the other hand, the larger the circumference of the rolled tobacco blank, the longer the shaping time required, and the more obvious the subsequent expansion. At the same time, it will cause the middle part of the tobacco blank to be too loose, affecting the draw resistance.

[0024] As a preferred embodiment of the above method, the pressure setting time is not less than 1 hour.

[0025] The shorter the setting time, the worse the setting effect of the tobacco blank, and the more obvious the subsequent expansion. In order to maintain the sharp prism shape of the tobacco blank after setting, the pressure setting time needs to be no less than 1 hour.

[0026] Compared with the prior art, the present invention has the following technical effects:

[0027] Existing cigar rolling methods require frequent tumbling to ensure even pressure on the tobacco blank. However, insufficient tumbling or improper timing can easily cause indentations. To address the tumbling problem in the shaping process of cigar rolling, this invention provides a method that transforms "indentation" into a necessary appearance feature of cigars, shaping the tobacco blank into an edged form, thus avoiding tumbling issues. Furthermore, by providing a corresponding shaping device, the pressed cigar blank is formed into a regular four-sided prism shape. This shaping device ensures even pressure during the pressing process, preventing the formation of excessive indentations. Specifically, the effect of this shaping device in pressing and forming a quadrangular prism shape comes from the following sources: the shaping groove of the tobacco blank on the mold base is formed by two sides with an included angle of not less than 90°, which is conducive to pressure balance and avoids the formation of other indentations besides the indentations at the side edges; the use of symmetrically set pressure strips can ensure that the tobacco blank is subjected to uniform force in all directions, avoiding deformation of the tobacco blank or the appearance of extra indentations due to uneven force. If the mold pressing process only has downward force, the tobacco blank will be subjected to uneven force, and the pressed tobacco blank will be severely deformed. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of a mold base structure;

[0029] Figure 2 This is a top view of the mold base structure.

[0030] Figure 3 A schematic diagram of a structure for a mold cover;

[0031] Figure 4 This is a schematic diagram of the structure after the mold top cover and mold base are closed.

[0032] Figure 5 This is a schematic diagram of a molding strip structure;

[0033] Figure 6 A schematic diagram of the structure of a tobacco embryo;

[0034] Figure 7 The square cigars obtained in Example 1 and Comparative Example 1 are shown, wherein the first and second cigars from the left are the square cigars obtained in Comparative Example 1 and Example 1, respectively.

[0035] Figure 8 This is a schematic diagram of the mold base in Comparative Example 1;

[0036] Figure 9 This is a schematic diagram of the structure of the mold cover in Comparative Example 1;

[0037] The markings in the diagram are as follows: 1. Mold base, 101. Tobacco blank shaping groove, 102. Positioning cavity, 2. Mold top cover, 201. Pressing groove, 202. Positioning protrusion, 3. Pressing strip, A. Space used to accommodate tobacco blank. Detailed Implementation

[0038] The present invention will be further described below with reference to embodiments. Those skilled in the art will be able to implement the present invention based on these descriptions. Furthermore, the embodiments of the present invention described below are generally only some, not all, of the embodiments of the present invention. Therefore, all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0039] General Implementation Examples

[0040] A method for rolling a square cigar is provided, comprising the following steps:

[0041] Step S1: Provide a shaping device:

[0042] like Figure 4 As shown, the shaping device includes a mold top cover 2, a mold base 1, and symmetrically arranged pressure strips 3; Figure 1 , Figure 2 and Figure 4 As shown, the mold base 1 includes a tobacco blank shaping groove 101, which is formed by two sides with an included angle of not less than 90°; Figure 3 , Figure 4 As shown, the mold cover 2 includes a pressing groove 201; as Figure 4 As shown, the pressure strip 3 is disposed within the pressure groove 201; as Figure 4 As shown, during the pressing of the tobacco blank, the mold cover 2 is closed with the mold base 1, and the symmetrically arranged pressing strips 3 and the tobacco blank shaping groove form a space A for accommodating the tobacco blank. This space is a quadrangular prism.

[0043] Step S2: Tobacco Blank Rolling: The inner tobacco leaves are manually spirally folded into single leaf bundles. These bundles are then gathered together and wrapped by a tobacco sleeve to form a cylindrical inner blank, the structure of which is as follows: Figure 6 As shown.

[0044] Step S3: Tobacco blank shaping, wherein the shaping is performed using the shaping device provided in step S1, and the shaping method includes the following operations: placing the tobacco blank in the tobacco blank shaping groove, placing the symmetrically arranged pressure strips 3 in the pressing groove, closing the mold cover with the mold base, and applying pressure for shaping.

[0045] The aforementioned square cigars, i.e. cigars with a four-sided prism shape, are rolled and shaped through the steps S1 to S3 described above.

[0046] In existing cigar rolling methods, the problem of indentation is avoided by repeatedly turning the cigar during the pressing process. This embodiment provides an "indentation" feature that is essential for the appearance of cigars, shaping the tobacco blank into an edged shape and avoiding the turning problem. However, the key to solving this problem lies in how to transform the locations where indentation is likely to occur during shaping into the four side edges of the cigar of this invention.

[0047] The structural schematic diagram of the tobacco blank shaping groove 101 is as follows: Figure 1 As shown. In this embodiment, the included angle between the two sides of the tobacco blank shaping groove is not less than 90°, which has two implications: the included angle between the two sides means that two of the four side edges of the cigar are on the mating plane of the mold cover and the mold base, which is beneficial for pressure balance and avoids the presence of other indentations besides the indentations at the side edges; the included angle of not less than 90° is beneficial for pressure balance.

[0048] The structural diagram of the molding strip is as follows: Figure 5 As shown, the pressure strips 3 are symmetrically arranged, and the symmetrically arranged pressure strips on the left and right are detachable and movable. In this embodiment, the symmetrical arrangement of the pressure strips ensures uniform force on the tobacco blank in all directions, preventing deformation or excessive indentations due to uneven force. If the mold pressing process only applies downward force, the tobacco blank will experience uneven force, resulting in severe deformation.

[0049] As a preferred embodiment of the above method, such as Figure 1 , Figure 2 As shown, the upper cover 2 of the mold is provided with a positioning protrusion 202, such as Figure 3 As shown, the mold base 1 is provided with a positioning cavity 102 for accommodating the positioning protrusion.

[0050] After the mold top cover and mold base are closed, the positioning protrusion is embedded in the positioning cavity. Due to the positioning effect of the positioning protrusion and the positioning cavity, the pressure strip on the mold top cover is not easy to move during the pressing and shaping of the tobacco blank, which is conducive to the uniform pressing force.

[0051] Further preferably, the number of the positioning protrusions is at least 2.

[0052] In a further preferred embodiment, the number of positioning protrusions is 3, and they are disposed on both sides of the pressing protrusion.

[0053] As a preferred embodiment of the above method, the tobacco blank shaping groove is formed by two sides with an included angle of 90°. This results in a cigar with a regular square prism shape, which is more aesthetically pleasing.

[0054] As a preferred embodiment of the above method, the cross-sectional dimensions of the space are 0.2 to 0.4 mm smaller than the target dimensions of the tobacco blank.

[0055] As a preferred embodiment of the above method, the size of the tobacco blank obtained by rolling the tobacco blank is 2-3 mm larger than the cross-sectional size of the space.

[0056] In the above method of this embodiment, the shape and size of the end face of the space are the shape and size of the cross-section after the tobacco blank is shaped, which is also the size of the cigar's smoking end face or ignition end face. For a cigar with a square prism shape, assuming that the target size of the cross-section of the regular square prism is 1.5mm × 1.5mm, it is preferable to set the cross-section of the space with the regular square prism shape to (1.5mm - 0.2~0.4mm) × (1.5mm - 0.2~0.4mm). When rolling the tobacco blank in step S2, the diameter of the rolled tobacco blank is the longest diameter of the cross-section of the space, plus 2~3mm. The reason for doing this is that, on the one hand, it ensures that the shaper acts on the tobacco blank to form a square prism; on the other hand, the larger the circumference of the rolled tobacco blank, the longer the shaping time required, the more obvious the subsequent expansion, and at the same time, it will cause the middle part of the tobacco blank to be too loose, affecting the draw resistance.

[0057] As a preferred embodiment of the above method, the pressure setting time is not less than 1 hour.

[0058] The shorter the setting time, the worse the setting effect of the tobacco blank, and the more obvious the subsequent expansion. In order to maintain the sharp prism shape of the tobacco blank after setting, the pressure setting time needs to be no less than 1 hour.

[0059] Compared with the prior art, this embodiment has the following technical effects:

[0060] Existing cigar rolling methods require frequent tumbling to ensure even pressure on the tobacco blank. However, insufficient tumbling or improper timing can easily cause indentations. To address the tumbling issue in the shaping process of cigar rolling, this embodiment provides a method that transforms "indentation" into a necessary appearance feature of cigars, shaping the tobacco blank into an edged form, thus avoiding tumbling problems. Furthermore, by providing a corresponding shaping device, the pressed cigar blank is formed into a regular four-sided prism shape. This shaping device ensures even pressure during the pressing process, preventing the formation of excessive indentations. Specifically, the effect of this shaping device in pressing and forming a quadrangular prism shape comes from the following sources: the shaping groove of the tobacco blank on the mold base is formed by two sides with an included angle of not less than 90°, which is conducive to pressure balance and avoids the formation of other indentations besides the indentations at the side edges; the use of symmetrically set pressure strips can ensure that the tobacco blank is subjected to uniform force in all directions, avoiding deformation of the tobacco blank or the appearance of extra indentations due to uneven force. If the mold pressing process only has downward force, the tobacco blank will be subjected to uneven force, and the pressed tobacco blank will be severely deformed.

[0061] Example 1

[0062] A method for rolling a square cigar is provided, comprising the following steps:

[0063] Step S1: Provide a shaping device:

[0064] like Figure 4 As shown, the shaping device includes a mold top cover 2, a mold base 1, and symmetrically arranged pressure strips 3; Figure 1 , Figure 2 and Figure 4 As shown, the mold base 1 includes a tobacco blank shaping groove 101, which is formed by two sides with an included angle of 90°; as Figure 3 , Figure 4 As shown, the mold cover 2 includes a pressing groove 201; as Figure 4 As shown, the pressure strip 3 is disposed within the pressure groove 201; as Figure 4 As shown, during the pressing of the tobacco blank, the mold cover 2 is closed with the mold base 1, and the symmetrically arranged pressing strips 3 and the tobacco blank shaping groove form a space A for accommodating the tobacco blank. This space is a quadrangular prism.

[0065] Step S2: Tobacco Blank Rolling: The inner tobacco leaves are manually spirally folded into single leaf bundles. These bundles are then gathered together and wrapped by a tobacco sleeve to form a cylindrical inner blank, the structure of which is as follows: Figure 6 As shown.

[0066] Step S3: Tobacco blank shaping, wherein the shaping is performed using the shaping device provided in step S1, and the shaping method includes the following operations: placing the tobacco blank in the tobacco blank shaping groove, placing the symmetrically arranged pressure strips 3 in the pressing groove, closing the mold cover with the mold base, and applying pressure for shaping.

[0067] The aforementioned square cigars, i.e. cigars with a four-sided prism shape, are rolled and shaped through the steps S1 to S3 described above.

[0068] In existing cigar rolling methods, the problem of indentation is avoided by repeatedly turning the cigar during the pressing process. This embodiment provides an "indentation" feature that is essential for the appearance of cigars, shaping the tobacco blank into an edged shape and avoiding the turning problem. However, the key to solving this problem lies in how to transform the locations where indentation is likely to occur during shaping into the four side edges of the cigar of this invention.

[0069] The structural schematic diagram of the tobacco blank shaping groove 101 is as follows: Figure 1 As shown. In this embodiment, the included angle between the two sides of the tobacco blank shaping groove is 90°, which has two implications: the included angle between the two sides means that two of the four side edges of the cigar are on the mating plane of the mold cover and the mold base, which is beneficial for pressure balance and avoids the presence of other indentations besides the indentations at the side edges; the included angle is not less than 90°, which is also beneficial for pressure balance.

[0070] The structural diagram of the molding strip is as follows: Figure 5 As shown, the pressure strips 3 are symmetrically arranged, and the symmetrically arranged pressure strips on the left and right are detachable and movable. In this embodiment, the symmetrical arrangement of the pressure strips ensures uniform force on the tobacco blank in all directions, preventing deformation or excessive indentations due to uneven force. If the mold pressing process only applies downward force, the tobacco blank will experience uneven force, resulting in severe deformation.

[0071] In this embodiment, as Figure 1 , Figure 2 As shown, the upper cover 2 of the mold is provided with a positioning protrusion 202, such as Figure 3 As shown, the mold base 1 is provided with a positioning cavity 102 for accommodating the positioning protrusion.

[0072] After the mold top cover and mold base are closed, the positioning protrusion is embedded in the positioning cavity. Due to the positioning effect of the positioning protrusion and the positioning cavity, the pressure strip on the mold top cover is not easy to move during the pressing and shaping of the tobacco blank, which is conducive to the uniform pressing force.

[0073] In this embodiment, the number of positioning protrusions is 3, and they are disposed on both sides of the pressing protrusion.

[0074] In this embodiment, the end face dimension of the space is 0.3 mm smaller than the target dimension of the tobacco blank.

[0075] In this embodiment, the size of the tobacco blank obtained by rolling the tobacco blank is 2.5 mm larger than the cross-sectional size of the space.

[0076] In this embodiment, the shape and size of the end face of the space refer to the shape and size of the cross-section after the tobacco blank is shaped, which is also the size of the cigar's smoking end face or ignition end face. For example, if the target size of the cross-section of the space is 1.5mm × 1.5mm, then in this embodiment, the two end faces of the space are set as (1.2mm) × (1.2mm) regular square prisms. When rolling the tobacco blank in step S2, the diameter of the rolled tobacco blank is the longest diameter of the cross-section of the space plus 2.5mm. This is done to ensure that the shaper acts on the tobacco blank to form a square prism, and because a larger circumference of the rolled tobacco blank requires a longer shaping time and results in more significant subsequent expansion. Furthermore, it can lead to an overly loose middle section of the tobacco blank, affecting the draw resistance.

[0077] As a preferred embodiment of the above method, the pressure setting time is 2 hours.

[0078] In order to maintain the sharp prismatic shape of the tobacco blanks obtained by molding, the pressure molding time is set to 2 hours in this embodiment.

[0079] The square cigar product prepared in this embodiment was stored for 3 months, and then... Figure 7 The second one from the left in the middle.

[0080] For other advantages of this embodiment, please refer to the general embodiment.

[0081] Comparative Example 1

[0082] A method for rolling a square cigar is provided, the main difference from Embodiment 1 being that: the tobacco shaping groove 101 in the mold base 1 is a cuboid-shaped groove, and the mold cover 2 is provided with a cuboid-shaped pressing groove 201 of the same size as the tobacco shaping groove 101 in the mold base 1 (the pressing groove and the tobacco shaping groove are symmetrically arranged with the covering plane of the mold cover 2 and the mold base 1 as the symmetrical plane), and no pressing strip 3 is provided. Everything else is the same as in Embodiment 1.

[0083] The structural schematic diagram of the mold base 1 in this comparative example is shown below. Figure 8 As shown in the diagram, the structural schematic of the mold cover 9 is as follows: Figure 8 As shown.

[0084] The square cigars prepared in this comparative example were stored for 3 months. Figure 7 The first one from the left in the middle.

[0085] Depend on Figure 7 A comparison of the left and right cigarettes shows that in Example 1, the tobacco blank is shaped by forming a groove with an included angle of 90° on both sides, and is pressed using an external pressing strip. The resulting tobacco blank has distinct edges and corners, and retains its sharp appearance even after three months. Furthermore, the... Figure 7 As can be seen, the tobacco blanks in Example 1 have better uniformity. A more uniform tobacco stick burns more evenly, which is beneficial for improving the sensory experience of smoking. The expansion and deformation of the tobacco blank is a common problem in cigar rolling. The filler is a whole dry tobacco leaf rolled into a bundle, then wrapped in a binder, shaped, and finally coated with a wrapper. Cigar rolling is generally carried out at around 24°C and 60% relative humidity. After rolling, it undergoes aging, which takes place at around 21°C and 65% relative humidity. In the cigar rolling process, the filler has a moisture content of approximately 14.5%, the binder approximately 20%, and the wrapper approximately 30%. Tobacco leaves have strong hygroscopic properties, and the rolling process involves balancing different types of tobacco leaves and managing the overall moisture content due to environmental factors. It is necessary to ensure that the final cigar product has a moisture content of around 14%. During the shaping process, including after applying the wrapper, the moisture content of the tobacco leaves decreases compared to when rolling, causing the cigar to expand overall. In contrast, after 3 months of placement, the expansion was obvious, the "edges" of the square prism became less obvious, and the deformation was severe.

[0086] Unless otherwise specified, the raw materials and equipment used in this invention are all commonly used in the field; unless otherwise specified, the methods used in this invention are all conventional methods in the field.

[0087] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, alterations, and equivalent transformations made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A method for rolling a square cigar, characterized in that: Includes the following steps: Step S1: Provide a shaping device: The shaping device includes a mold cover, a mold base, and symmetrically arranged pressure strips. The mold base includes a tobacco blank shaping groove, which is formed by two sides with an included angle of not less than 90°. The mold cover includes a pressing groove. The pressure strips are disposed in the pressing groove. When the tobacco blank is pressed, the mold cover and the mold base are closed, and the symmetrically arranged pressure strips and the tobacco blank shaping groove form a space for accommodating the tobacco blank. The space is a quadrangular prism. Step S2: Rolling the tobacco blanks; Step S3: Tobacco blank shaping, wherein the shaping is performed using the shaping device provided in step S1, and the shaping method includes the following operations: placing the tobacco blank in the tobacco blank shaping groove, placing the symmetrically arranged pressure strips in the pressing groove, closing the mold cover with the mold base, and applying pressure for shaping.

2. The method for rolling a square cigar as described in claim 1, characterized in that: The mold cover is provided with a positioning protrusion, and the mold base is provided with a positioning cavity for accommodating the positioning protrusion.

3. The method for rolling a square cigar as described in claim 2, characterized in that: The number of the positioning protrusions is at least 2.

4. The method for rolling a square cigar as described in claim 3, characterized in that: The number of positioning protrusions is 3, and they are arranged on both sides of the pressing protrusion.

5. The method for rolling a square cigar as described in claim 1, characterized in that: The tobacco blank shaping groove is formed by two sides with an included angle of 90°.

6. The method for rolling a square cigar as described in claim 1, characterized in that: The cross-sectional dimensions of the space are 0.2 to 0.4 mm smaller than the target dimensions of the tobacco blank.

7. The method for rolling a square cigar as described in claim 1, characterized in that: The size of the tobacco blank obtained by rolling the tobacco blank is 2-3 mm larger than the cross-sectional size of the space.

8. The method for rolling a square cigar as described in claim 1, characterized in that: The pressure setting time shall not be less than 1 hour.

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