Countersunk filter cigarette, separation drum, cigarette splicing device and splicing method

Abstract

The present invention provides a countersunk filter cigarette, a separation drum, a cigarette splicing device and a splicing method, the splicing method comprising: the raw cigarettes are fed into the first cutting drum one by one by the feeding drum, cut along the center of the raw cigarette to obtain two cigarettes, and then fed into the separation drum, the two cigarettes are separated by negative pressure adsorption and the end spacing of the two cigarettes is adjusted; while processing the raw cigarettes, the tipping paper is fed and cut synchronously by the tipping paper supply module, the tipping paper after cutting and the two separated cigarettes are fed into the cigarette splicing module at the same time, the tipping paper is wrapped around the filter of the cigarette and spliced ​​and fixed; the spliced ​​cigarettes are fed into the cutting and discharging module, cut along the center of the cigarette, and two countersunk filter cigarettes are obtained and then sent out of the cigarette splicing device. The present invention uses tipping paper to directly wrap the filter area to form a countersunk cavity, omitting the production link of the traditional countersunk filter cigarette that needs to prepare the countersunk structure cavity filter rod first.

Description

Technical Field

[0001] The invention belongs to the technical field of cigarette production, and relates to a countersunk filter cigarette, a separation drum, a cigarette splicing device and a cigarette splicing method. Background Art

[0002] A sunken filter is a filter forming paper on a tow filter rod that is longer than the tow filter rod, forming a sunken structure at the end of the filter, that is, the end of the filter is hollow and not filled with a tow filter rod. The sunken filter rod is a filter rod covered with a layer of outer forming paper that is longer than the base rod and has a greater hardness, making the sunken part of the empty filter rod. The current sunken filter rod or filter is mainly made by first using a high-quantity forming paper or cardboard tube to make a composite filter rod, and then cutting the empty tube section to connect cigarettes to make a sunken filter cigarette. The cigarette connecting paper rubbing device is the same as that of a normal filter cigarette. When smoking, it can prevent smokers from licking the tar adsorbed on the tow, reducing the harm to the body. Before entering the oral cavity, the smoke is retained in the hollow cavity of the cigarette head. The retained smoke is partially deposited and partially emitted into the air, which can reduce the harm of smoking cigarettes. At the same time, the hollow part of the countersunk head can achieve appropriate mixing and cooling of the smoke, settle impurities, make the aftertaste cleaner, and form a comfortable taste. It can also gather and concentrate the smoke, which has a certain effect on improving the taste of cigarettes.

[0003] CN202232975U discloses a countersunk cigarette filter made of hard wrapping paper, comprising a tow filter rod and wrapping paper for wrapping the tow filter rod. The wrapping paper wrapped on the tow filter rod is longer than the tow filter rod, forming a countersunk structure at the end of the filter.

[0004] CN114190588A discloses a countersunk filter tip, a cigarette using the countersunk filter tip and a method for preparing the countersunk filter tip. The countersunk filter tip is made by a filter rod forming machine by wrapping a cavity section and a filter section with forming paper.

[0005] CN207626542U discloses a novel cigarette for heating non-burning cigarettes, which comprises: a reverse countersunk filter rod, a first hollow filter rod, a second hollow filter rod, and a tobacco rod, wherein the reverse countersunk filter rod comprises a filter section and a hollow section; the first hollow filter rod has a first axial cavity, the second hollow filter rod has a second axial cavity, the equivalent diameter of the second axial cavity is greater than the equivalent diameter of the first axial cavity, and the equivalent diameter of the second axial cavity is smaller than the diameter of the hollow section.

[0006] CN211185847U discloses a cigarette with different flavors. The cigarette includes a tobacco shred segment and a filter rod, the filter rod includes a near tobacco shred segment and a countersunk segment in sequence in the direction away from the tobacco shred segment, the countersunk segment is defined by the portion of the wrapping paper at one end of the near tobacco shred segment away from the tobacco shred segment protruding from the filament bundle of the near tobacco shred segment, the filling cavity of the countersunk segment is used for inserting a filling filament bundle body with flavor material, and after being inserted into the filling cavity, the filling filament bundle body can be in close contact with the filament bundle of the near tobacco shred segment to form a filament bundle structure that is substantially continuous in the axial direction of the filter rod.

[0007] CN217407773U discloses a heating cigarette with a spiral hollow filter rod, comprising a cigarette core, a filter rod and cigarette paper, wherein the filter rod is composed of a cavity section, a hollow section and a acetate fiber section; a spiral hollow channel is arranged inside the hollow section, and both end ports of the hollow section are trumpet-mouth structures and communicate with the spiral hollow channel; the far lip end of the acetate fiber section is a countersunk structure; the cigarette core, the cavity section, the hollow section and the acetate fiber section are coaxially abutted in sequence and wrapped by cigarette paper.

[0008] CN217407774U discloses a heating cigarette filter rod containing a spiral hollow structure, comprising a hollow section and a acetate section combined together by cigarette tipping paper, a spiral hollow channel is arranged inside the hollow section, both end ports of the hollow section are bell-mouth structures and communicate with the spiral hollow channel; the far lip end of the acetate section is a countersunk structure and abuts against the bell-mouth at one end of the hollow section, the hollow section is made of plastic material, and the spiral hollow channel inside it is made by injection molding.

[0009] CN207626542U discloses a novel cigarette for heating non-burning cigarettes, which comprises: a reverse countersunk filter rod, a first hollow filter rod, a second hollow filter rod, and a tobacco rod, wherein the reverse countersunk filter rod comprises a filter section and a hollow section; the first hollow filter rod has a first axial cavity, the second hollow filter rod has a second axial cavity, the equivalent diameter of the second axial cavity is greater than the equivalent diameter of the first axial cavity, and the equivalent diameter of the second axial cavity is smaller than the diameter of the hollow section.

[0010] Increasing the stiffness of the forming paper or cardboard tube will make the thickness of the countersunk head of the filter too high. Since the countersunk head has no internal support, the surface adhesion of the tipping paper to the countersunk filter is poor. When the tipping paper is rubbed and cut on the rolling machine, it is easy to cause deformation of the filter end face, stubble, serious stratification between the tipping paper and the filter, and other appearance defects, which seriously affect the widespread application of countersunk filter cigarettes. Summary of the invention

[0011] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a countersunk filter cigarette, a separation drum, a cigarette splicing device and a splicing method. In the present invention, a countersunk structure is formed at the filter end of the countersunk filter cigarette, that is, the filter end is a cavity without a filter element; the present invention uses cigarettes with tobacco shreds as raw materials, and uses tipping paper to directly wrap the filter area to form a countersunk cavity, thereby omitting the production step of traditional countersunk filter cigarettes that requires the preparation of a countersunk structure cavity filter rod.

[0012] The separation drum provided by the present invention is mainly used in the rubbing and splicing equipment of countersunk filter cigarettes. Its function is to separate and position the cut cigarettes to facilitate the subsequent wrapping and fixing of the tipping paper, so that the appearance of the products of the same batch remains consistent, effectively reducing the product defect rate.

[0013] To achieve this object, the present invention adopts the following technical solutions:

[0014] In a first aspect, the present invention provides a method for splicing countersunk filter cigarettes, the splicing method comprising:

[0015] The raw cigarettes are fed one by one into the first cutting drum by the feeding drum, and two cigarettes are cut along the center of the raw cigarettes. Then, the raw cigarettes are fed into the separation drum, and the two cigarettes are separated by negative pressure adsorption and the distance between the ends of the two cigarettes is adjusted;

[0016] While processing the raw cigarettes, the tipping paper is fed and cut synchronously through the tipping paper supply module, and the cut tipping paper and the two separated cigarettes are simultaneously fed into the cigarette splicing module, where the tipping paper is wrapped around the filter tip of the cigarette and spliced ​​and fixed;

[0017] The spliced ​​cigarettes are fed into the cutting and discharging module, cut along the center of the cigarettes, and two countersunk filter cigarettes are obtained and then sent out of the cigarette splicing device.

[0018] In the present invention, a countersunk structure is formed at the filter end of the countersunk filter cigarette, that is, the filter end is a cavity without a filter element. In the traditional production process of countersunk filter cigarettes, it is first necessary to prepare a countersunk filter rod. The countersunk filter rod is a base rod covered with an outer layer of molding paper that is longer than the base rod and has a higher hardness to form a cavity with a countersunk structure. The countersunk filter rod is then cut to form a countersunk filter and twisted with a tobacco rod to finally form a countersunk filter cigarette. The present invention uses cigarettes with tobacco as raw materials, and uses tipping paper to directly wrap the filter area to form a countersunk cavity, thereby omitting the production link of the traditional countersunk filter cigarette, which requires the preparation of a countersunk structure cavity filter rod.

[0019] As a preferred technical solution of the present invention, the splicing method specifically comprises the following steps:

[0020] (I) Raw cigarettes are fed into the first cutting drum wheel one by one from the feeding drum wheel, the middle section of the raw cigarette is the filter section, and the two ends of the filter section have tobacco sections; two cigarettes are cut along the center of the filter section of the raw cigarette to obtain two cigarettes, the filters of the two cigarettes are placed opposite to each other, and the two cut cigarettes are adsorbed and fixed into the groove of the separation drum wheel; the two cigarettes are adsorbed to the two ends of the groove through the negative pressure chamber, so that a gap is formed between the filters of the two cigarettes; while the separation drum wheel rotates, the negative pressure chamber is stationary, and the cigarettes in the groove enter the negative pressure chamber to complete the cigarette separation;

[0021] (II) while processing the raw material cigarettes, feeding and cutting the tipping paper through the tipping paper feeding device and the tipping paper cutting device; maintaining the gap between the ends of the two cigarettes, feeding the cut tipping paper and the two separated cigarettes into the splicing drum at the same time, and wrapping at least part of the filter tips of the two cigarettes and the gap between the two filter tips with the tipping paper through the splicing drum;

[0022] (III) The spliced ​​cigarettes are fed into the second slitting drum, and the tipping paper at the wrapping gap is cut along the center to obtain two counter-pointed filter cigarettes. They are then fed into the direction adjustment drum to adjust the direction of the two counter-pointed filter cigarettes to achieve the same direction output.

[0023] It should be noted that the cigarette splicing method provided by the present invention has two parallel technical solutions:

[0024] Solution 1:

[0025] (1) One-time cutting: a complete raw cigarette (including tobacco segments and filter segments, with tobacco segments located at both ends of the filter segment) is first cut along the center of the filter segment to obtain two cigarettes, both of which have tobacco segments and filters connected to the tobacco segments;

[0026] (2) Cigarette separation: Two cigarettes are then fed into the separation drum and fixed to the groove of the separation drum under the action of negative pressure. The negative pressure chamber is evacuated through the exhaust holes at both ends of the negative pressure chamber, so that the two cigarettes move to the two ends of the groove until they hit the limiters at both ends. At this time, the filter tips of the two cigarettes are opposite to each other, and the tobacco segments are close to the limiters. The distance between the ends of the filter tips of the two cigarettes is 4 to 20 mm, that is, twice the depth of the countersunk cavity.

[0027] (3) Cigarette splicing: The two separated cigarettes are fed into the splicing drum as the separation drum rotates. At the same time, the tipping paper output device feeds the cut tipping paper into the splicing drum. In the splicing drum, the tipping paper simultaneously wraps at least part of the filter tips of the two cigarettes and the gap between the two filter tips to complete the splicing. The two spliced ​​cigarettes are now wrapped by the tipping paper to form a whole.

[0028] (4) Secondary slitting: The spliced ​​cigarettes are fed into the second slitting drum, where the tipping paper at the wrapping gap is cut along the center. The gap between the two cigarettes is surrounded by the tipping paper and cut to form their own countersunk cavities, and finally the countersunk filter cigarettes are obtained; then the two countersunk filter cigarettes are fed into the adjustment drum, and the two countersunk filter cigarettes arranged in reverse are adjusted to achieve the same direction output.

[0029] Option 2:

[0030] (1) Cigarette feeding: a complete raw cigarette (including tobacco and filter segments, with the filter segments located at both ends of the tobacco segment) is fed into the separation drum;

[0031] (2) Cigarette positioning: After the raw cigarette is fed into the separation drum, it is adsorbed and fixed into the groove of the separation drum under the action of negative pressure. The negative pressure chamber is evacuated or air is injected through the exhaust holes at both ends of the negative pressure chamber so that the raw cigarette is centered in the groove. At the same time, the distance between the two ends of the raw cigarette and the stopper is adjusted to 2 to 10 mm, that is, the depth of the countersunk cavity.

[0032] (3) Cigarette splicing: The positioned raw cigarettes are fed into the splicing drum as the separation drum rotates. At the same time, the tipping paper output device feeds the cut tipping paper into the splicing drum. In the splicing drum, two pieces of tipping paper simultaneously wrap at least part of the filter tips at both ends of the raw cigarettes and complete the splicing. At the same time, one end of the tipping paper extends beyond one end of the filter tip to form a countersunk cavity.

[0033] (4) Cigarette cutting: The spliced ​​cigarettes are fed into the second cutting drum and cut along the center of the raw tobacco segment to split the raw cigarette into two, thereby obtaining two counter-point filter cigarettes. Subsequently, the two counter-point filter cigarettes are fed into the adjustment drum to adjust the direction of the two counter-point filter cigarettes arranged in reverse order to achieve the same-direction output.

[0034] In a second aspect, the present invention provides a cigarette splicing device for the splicing method described in the first aspect, the cigarette splicing device comprising a shell and a cigarette supply module, a tipping paper supply module, a cigarette splicing module and a cutting and discharging module located in the shell, the cigarette splicing module simultaneously docking with the cigarette supply module and the tipping paper supply module, the cigarette splicing module and the tipping paper supply module respectively convey cigarettes and tipping paper to the cigarette splicing module, the cigarette splicing module is used to splice the tipping paper to the surface of the cigarette and wrap the cigarette, and the cutting and discharging module is used to cut the spliced ​​cigarettes and send them out of the shell;

[0035] The cigarette supply module includes a feeding drum, a first cutting drum and a separation drum which are connected in sequence along the moving direction of the cigarettes. The first cutting drum is used to cut the raw cigarette into two cigarettes along the center, and the separation drum is used to separate the two cut cigarettes and adjust the distance between the ends of the two cigarettes.

[0036] As a preferred technical solution of the present invention, the separation drum comprises an axially through-going drum body, the outer surface of the drum body is provided with a plurality of grooves, the length direction of the grooves is parallel to the central axis of the drum body, and each of the grooves is filled with two groups of cigarettes;

[0037] A negative pressure chamber is arranged on the outer side of the drum body in close contact with the surface along the length direction, and the negative pressure chamber covers at least a portion of the groove; exhaust holes are respectively provided at both ends of the negative pressure chamber, and air is exhausted from the negative pressure chamber through the exhaust holes; limiting members are also arranged at both ends of the negative pressure chamber, and two groups of cigarettes in the same groove move in opposite directions along the length direction of the groove under the action of negative pressure until they hit the limiting members at both ends; while the separation drum rotates, the negative pressure chamber is stationary, and the cigarettes in the groove enter the negative pressure chamber to complete the cigarette separation.

[0038] The separation drum provided by the present invention is mainly used in the rubbing and splicing equipment of countersunk filter cigarettes. Its function is to separate and position the cut cigarettes, so as to facilitate the subsequent wrapping and fixing of the tipping paper, so that the appearance of the products of the same batch remains consistent, and the product defect rate is effectively reduced. The present invention adsorbs the filter cigarettes on the separation drum through the through hole. After the cigarettes are cut, they enter the negative pressure chamber with the rotation of the separation drum. Under the suction of the exhaust holes at both ends, the negative pressure in the exhaust holes forms a negative pressure adsorption effect on the cigarettes, so that the two cigarettes move to the two ends of the groove until they hit the limiter. Under the action of the limiter and the negative pressure chamber, the cigarettes are separated and accurately positioned.

[0039] As a preferred technical solution of the present invention, a plurality of through holes are provided on the bottom surface of the groove, and the through holes are all connected to a negative pressure pipeline. Air is evacuated through the negative pressure pipeline to fix the two groups of cigarettes in the groove under the action of negative pressure.

[0040] Preferably, the pressure in the negative pressure pipeline is 0.5-1.5 MPa, for example, it can be 0.5 MPa, 0.6 MPa, 0.7 MPa, 0.8 MPa, 0.9 MPa, 1.0 MPa, 1.1 MPa, 1.3 MPa, 1.4 MPa or 1.5 MPa, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0041] Preferably, the exhaust hole is connected to an exhaust pipeline, and the pressure in the exhaust pipeline is 0.5-1.5 MPa, for example, it can be 0.5 MPa, 0.6 MPa, 0.7 MPa, 0.8 MPa, 0.9 MPa, 1.0 MPa, 1.1 MPa, 1.3 MPa, 1.4 MPa or 1.5 MPa, but it is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0042] In the present invention, the negative pressure can be accurately controlled by the air extraction pipeline and the negative pressure pipeline to ensure that the relative position and length of the two cigarettes in each groove are stable and consistent. The pressure range in the air extraction pipeline and the negative pressure pipeline is 0.5-1.5MPa and can be adjusted by corresponding devices.

[0043] Preferably, after the separation, the distance between the ends of the two groups of cigarettes in the same groove is 4 to 20 mm, for example, it can be 4 mm, 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 16 mm, 18 mm or 20 mm, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0044] As a preferred technical solution of the present invention, the tipping paper supply module includes a tipping paper supply device, a tipping paper slitting device and a tipping paper output device which are sequentially connected along the moving direction of the tipping paper.

[0045] As a preferred technical solution of the present invention, the cigarette splicing module includes a splicing drum wheel, the tipping paper slitting device and the separation drum wheel are simultaneously connected to the splicing drum wheel, and the splicing drum wheel is used to wrap two cigarettes with the cut tipping paper at the same time and splice them.

[0046] As a preferred technical solution of the present invention, the cutting and discharging module includes a second cutting drum wheel and a direction adjustment drum wheel which are connected in sequence along the moving direction of the cigarettes. The second cutting drum wheel is used to cut the cigarettes after twisting and splicing along the center to obtain two counter-arranged counter-arranged filter cigarettes; the direction adjustment drum wheel is used to adjust the direction of two counter-arranged filter cigarettes to achieve output in the same direction.

[0047] In a third aspect, the present invention discloses a countersunk filter cigarette, which is prepared by the twisting method described in claim 1 or 2, and comprises a tobacco segment and a filter located at one end of the tobacco segment, at least a portion of the outer periphery of the filter is wrapped with tipping paper, the end of the filter away from the cigarette is a suction end, one end of the tipping paper exceeds the suction end of the filter, and a countersunk cavity is formed between the side wall of one end of the tipping paper exceeding the filter and the suction end of the filter.

[0048] The countersunk filter cigarette provided by the present invention has a simple structure and a novel form, and the appearance quality of the countersunk cavity is good. The splicing method provided by the present invention solves the appearance defects of traditional countersunk filter cigarettes such as deformation of the countersunk end face, burrs, and stratification that cannot be overcome, and there is no special requirement for the filter rod, and there is no need to provide a cavity or an empty tube composite filter rod, which can avoid the use of multi-layer filter rod forming paper resulting in poor filter wrapping and affecting the smoking quality of the cigarette. When the cigarettes are spliced, the filter rod auxiliary materials can be used in a wider range of specifications, the production process of the countersunk filter rods is omitted, and the mass production requirements are met. Compared with the traditional production process of countersunk filter cigarettes, the defect rate of cigarettes is lower and the quality is more stable under the condition of unchanged production efficiency.

[0049] When smoking, the presence of the countersunk cavity can prevent the smoker's lips from contacting the tar adsorbed on the filter tow, reducing the harm to the body. The smoke is retained in the countersunk cavity of the cigarette before entering the mouth. The retained smoke is partially deposited and partially released into the air, which can reduce the harm of smoking cigarettes. At the same time, the countersunk cavity can achieve appropriate mixing and cooling of the smoke, settle the impurities, make the aftertaste cleaner, and form a comfortable taste. It can also gather and concentrate the smoke, which is helpful to improve the taste of cigarettes.

[0050] As a preferred technical solution of the present invention, the weight of the tipping paper is 30-110 g / m 2 , for example, it can be 30g / m 2 , 40g / m 2 , 50g / m 2 , 60g / m 2 , 70g / m 2 , 80g / m 2 , 90g / m 2 , 100g / m 2 or 110g / m 2 , but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0051] Preferably, the thickness of the tipping paper is 50-150 μm, for example, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 110 μm, 120 μm, 130 μm, 140 μm or 150 μm, but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0052] Preferably, the longitudinal tensile strength of the tipping paper is 6-9 kN / m, for example, 6.0 kN / m, 6.2 kN / m, 6.4 kN / m, 6.6 kN / m, 6.8 kN / m, 7.0 kN / m, 7.2 kN / m, 7.4 kN / m, 7.6 kN / m, 7.8 kN / m, 8.0 kN / m, 8.2 kN / m, 8.4 kN / m, 8.6 kN / m, 8.8 kN / m or 9.0 kN / m, but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0053] Preferably, the transverse tensile strength of the tipping paper is 4-6 kN / m, for example, 4.0 kN / m, 4.2 kN / m, 4.4 kN / m, 4.6 kN / m, 4.8 kN / m, 5.0 kN / m, 5.2 kN / m, 5.4 kN / m, 5.6 kN / m, 5.8 kN / m or 6.0 kN / m, but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0054] Preferably, the longitudinal stiffness of the tipping paper is 600-900 mN, for example, it may be 600 mN, 620 mN, 640 mN, 660 mN, 680 mN, 700 mN, 720 mN, 740 mN, 760 mN, 780 mN, 800 mN, 820 mN, 840 mN, 860 mN, 880 mN or 900 mN, but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0055] Preferably, the transverse stiffness of the tipping paper is 400-700 mN, for example, 400 mN, 450 mN, 600 mN, 550 mN, 600 mN, 650 mN or 700 mN, but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0056] Preferably, the water absorption of the tipping paper is 20 to 35 g / m 2 , for example, it can be 20g / m 2 , 21g / m 2 , 22g / m 2 , 23g / m 2 , 24g / m 2 , 25g / m 2 , 26g / m 2 , 27g / m 2 , 28g / m 2 , 29g / m 2 , 30g / m 2 , 31g / m 2 , 32g / m 2 , 33g / m2 , 34g / m 2 or 35g / m 2 , but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0057] As a preferred technical solution of the present invention, the depth of the countersunk cavity is 2 to 10 mm, for example, it can be 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0058] Preferably, the length of the countersunk filter cigarette is 84 to 96 mm, for example, it can be 84 mm, 85 mm, 86 mm, 87 mm, 88 mm, 89 mm, 90 mm, 91 mm, 92 mm, 93 mm, 94 mm, 95 mm or 96 mm, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0059] Preferably, the cross-sectional circumference of the countersunk filter cigarette is 16 to 25 mm, for example, it can be 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm or 25 mm, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0060] The numerical range described in the present invention not only includes the point values ​​listed above, but also includes any point values ​​between the above numerical ranges that are not listed. Due to space limitations and for the sake of simplicity, the present invention no longer exhaustively lists the specific point values ​​included in the range.

[0061] Compared with the prior art, the present invention has the following beneficial effects:

[0062] (1) In the present invention, a countersunk structure is formed at the filter end of the countersunk filter cigarette, that is, the filter end is a cavity without a filter element; in the traditional production process of countersunk filter cigarettes, it is first necessary to prepare a countersunk filter rod, which is a base rod covered with an outer layer of molding paper that is longer than the base rod and has a higher hardness to form a cavity with a countersunk structure, and then cut to form a countersunk filter, and twisted with a tobacco rod to finally form a countersunk filter cigarette. The present invention uses tobacco-containing cigarettes as raw materials, and uses tipping paper to directly wrap the filter area to form a countersunk cavity, thereby omitting the production process of the traditional countersunk filter cigarette, which requires the preparation of a countersunk structure cavity filter rod;

[0063] (2) The separation drum provided by the present invention is mainly used in the rubbing and splicing equipment of countersunk filter cigarettes. Its function is to separate and position the cut cigarettes, so as to facilitate the subsequent wrapping and fixing of the tipping paper, so that the appearance of the products in the same batch remains consistent. The present invention adsorbs the filter cigarettes on the separation drum through the through hole. After the cigarettes are cut, they enter the negative pressure chamber with the rotation of the separation drum. Under the suction of the exhaust holes at both ends, the negative pressure in the exhaust holes forms a negative pressure adsorption effect on the cigarettes, so that the two cigarettes move to the two ends of the groove until they hit the limiter. Under the action of the limiter and the negative pressure chamber, the cigarettes are separated and accurately positioned. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 A schematic diagram of the structure of a cigarette twisting and joining device provided in a specific embodiment of the present invention;

[0065] Figure 2 A schematic diagram of the structure of a separation drum provided in a specific embodiment of the present invention;

[0066] Figure 3 A cross-sectional structural diagram of a separation drum provided in accordance with a specific embodiment of the present invention.

[0067] Figure 4 A schematic diagram of a cigarette cutting process provided for a specific embodiment of the present invention;

[0068] Figure 5 Another schematic diagram of a cigarette cutting process provided by a specific embodiment of the present invention;

[0069] Among them, 1-separation drum; 2-negative pressure chamber; 3-through hole; 4-groove; 5-exhaust hole; 6-limiting piece; 7-cigarette; 8-negative pressure pipeline; 9-exhaust pipeline; 10-feeding drum; 11-first slitting drum; 12-tipping paper supply device; 13-tipping paper slitting device; 14-tipping paper output device; 15-rubbing drum; 16-second slitting drum; 17-adjusting drum; 18-tobacco segment; 19-filter; 20-tipping paper; 21-gap. DETAILED DESCRIPTION

[0070] It should be understood that, in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0071] It should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0072] The technical solution of the present invention is further illustrated below through specific implementation methods.

[0073] In a specific embodiment, the present invention provides a method for splicing a countersunk filter 19 cigarette 7, the splicing method comprising:

[0074] like Figure 1 , Figure 2 and Figure 3 As shown, the raw cigarettes 7 are fed one by one from the feeding drum 10 into the first cutting drum 11, and the raw cigarettes 7 are cut along the center to obtain two cigarettes 7, which are then fed into the separation drum 1, and the two cigarettes 7 are separated by negative pressure adsorption and the distance between the ends of the two cigarettes 7 is adjusted;

[0075] While processing the raw material cigarettes 7, the tipping paper 20 is fed and cut synchronously through the tipping paper 20 supply module, and the cut tipping paper 20 and the two separated cigarettes 7 are simultaneously fed into the cigarette 7 splicing module, and the tipping paper 20 is wrapped around the filter 19 of the cigarette 7 and spliced ​​and fixed;

[0076] The spliced ​​cigarettes 7 are fed into the cutting and discharging module, and are cut along the center of the cigarettes 7 to obtain two countersunk filter-tipped cigarettes 7, which are then fed out of the cigarette splicing device.

[0077] In the present invention, a countersunk structure is formed at the end of the filter 19 of the countersunk filter 19 cigarette 7, that is, the end of the filter 19 is a cavity without a filter element. In the traditional production process of the countersunk filter 19 cigarette 7, it is first necessary to prepare a countersunk filter rod. The countersunk filter rod is a base rod covered with an outer layer of molding paper that is longer than the base rod and has a higher hardness to form a cavity with a countersunk structure, and then cut to form a countersunk filter 19, and twisted with a tobacco rod to finally form a countersunk filter 19 cigarette 7. The present invention uses a cigarette 7 with tobacco as a raw material, and uses the tipping paper 20 to directly wrap the filter 19 area to form a countersunk cavity, which omits the production link of the traditional countersunk filter 19 cigarette 7, which requires the preparation of a countersunk structure cavity filter rod.

[0078] Furthermore, the splicing method specifically comprises the following steps:

[0079] (I) Raw cigarettes 7 are fed one by one from a feeding drum 10 into a first cutting drum 11, the middle section of the raw cigarette 7 is a filter 19 section, and both ends of the filter 19 section have tobacco shreds 18; two cigarettes 7 are cut along the center of the filter 19 section of the raw cigarette 7, and the filters 19 of the two cigarettes 7 are placed opposite to each other, and the two cut cigarettes 7 are adsorbed and fixed to the groove 4 of the separation drum 1; the two cigarettes 7 are adsorbed to both ends of the groove 4 by the negative pressure chamber 2, so that a gap 21 is formed between the filters 19 of the two cigarettes 7; while the separation drum 1 rotates, the negative pressure chamber 2 is stationary, and the cigarettes 7 in the groove 4 enter the negative pressure chamber 2 to complete the separation of the cigarettes 7;

[0080] (II) While processing the raw material cigarettes 7, the tipping paper 20 is fed and cut by the tipping paper 20 feeding device 12 and the tipping paper 20 cutting device 13; the tipping paper 20 after cutting and the two separated cigarettes 7 are simultaneously fed into the splicing drum 15, and the tipping paper 20 is simultaneously wrapped around at least part of the filter tips 19 of the two cigarettes 7 and the gap 21 between the two filter tips 19 by the splicing drum 15;

[0081] (III) The spliced ​​cigarettes 7 are fed into the second slitting drum 16, and the tipping paper 20 at the wrapping gap 21 is cut along the center to obtain two countersunk filter-tipped cigarettes 7, which are then fed into the direction adjustment drum 17 to adjust the two countersunk filter-tipped cigarettes 7 arranged in reverse to achieve the same direction output.

[0082] It should be noted that there are two parallel technical solutions for the method for joining cigarettes 7 provided by the present invention:

[0083] Solution 1:

[0084] like Figure 4 As shown, the splicing method specifically comprises the following steps:

[0085] (1) One-time cutting: a complete raw cigarette 7 (including tobacco segments 18 and filter segments 19, with tobacco segments 18 located at both ends of the filter segment 19) is first cut along the center of the filter segment 19 to obtain two cigarettes 7, both of which have tobacco segments 18 and filters 19 connected to the tobacco segments 18;

[0086] (2) Separation of cigarettes 7: The two cigarettes 7 are then fed into the separation drum 1 and fixed to the groove 4 of the separation drum 1 under the action of negative pressure. The negative pressure chamber 2 is evacuated through the suction holes 5 at both ends of the negative pressure chamber 2, so that the two cigarettes 7 move to the two ends of the groove 4 until they abut against the stoppers 6 at both ends. At this time, the filter tips 19 of the two cigarettes 7 are opposite to each other, and the tobacco segments 18 are close to the stoppers 6. The distance between the ends of the filter tips 19 of the two cigarettes 7 is 4 to 20 mm, that is, twice the depth of the countersunk cavity.

[0087] (3) Splicing of cigarettes 7: The two separated cigarettes 7 are fed into the splicing drum 15 as the separation drum 1 rotates. At the same time, the tipping paper 20 output device 14 feeds the cut tipping paper 20 into the splicing drum 15. In the splicing drum 15, the tipping paper 20 simultaneously wraps at least part of the filter tips 19 of the two cigarettes 7 and the gap 21 between the two filter tips 19 and completes the splicing. The two spliced ​​cigarettes 7 are now wrapped by the tipping paper 20 to form a whole.

[0088] (4) Secondary slitting: The spliced ​​cigarettes 7 are fed into the second slitting drum 16, and the tipping paper 20 at the wrapping gap 21 is cut along the center. The gap 21 between the two cigarettes 7 is surrounded by the tipping paper 20 and cut to form respective countersunk cavities, and finally the countersunk filter 19 cigarettes 7 are obtained; then, the two countersunk filter 19 cigarettes 7 are fed into the adjustment drum 17, and the two countersunk filter 19 cigarettes 7 arranged in reverse are adjusted to achieve the same direction output.

[0089] Option 2:

[0090] like Figure 5 As shown, the splicing method specifically comprises the following steps:

[0091] (1) Feeding cigarette 7: feeding a complete raw cigarette 7 (including tobacco shreds 18 and filter 19, with filter 19 located at both ends of tobacco shreds 18) into the separation drum 1;

[0092] (2) Positioning of the cigarette 7: After the raw cigarette 7 is fed into the separation drum 1, it is adsorbed and fixed to the groove 4 of the separation drum 1 under the action of negative pressure. The negative pressure chamber 2 is evacuated or air is injected through the exhaust holes 5 at both ends of the negative pressure chamber 2, so that the raw cigarette 7 is centered in the groove 4. At the same time, the distance between the two ends of the raw cigarette 7 and the stopper 6 is adjusted to 2 to 10 mm, that is, the depth of the countersunk cavity;

[0093] (3) Splicing of cigarettes 7: the positioned raw cigarettes 7 are fed into the splicing drum 15 as the separation drum 1 rotates. At the same time, the tipping paper 20 output device 14 feeds the cut tipping paper 20 into the splicing drum 15. In the splicing drum 15, two pieces of tipping paper 20 simultaneously wrap at least part of the filter tips 19 at both ends of the raw cigarette 7 and splice them. At the same time, one end of the tipping paper 20 extends beyond one end of the filter tip 19 to form a countersunk cavity.

[0094] (4) Cutting the cigarettes 7: The spliced ​​cigarettes 7 are fed into the second cutting drum 16 and cut along the center of the tobacco segment 18 of the raw cigarette 7 to split the raw cigarette 7 into two, thereby obtaining two counter-point filter cigarettes 19; the two counter-point filter cigarettes 19 are then fed into the adjusting drum 17 to adjust the directions of the two counter-point filter cigarettes 19 arranged in opposite directions to achieve output in the same direction.

[0095] In another specific embodiment, the present invention provides a cigarette 7 splicing device for the above-mentioned splicing method, the cigarette 7 splicing device comprises a shell and a cigarette 7 supply module, a tipping paper 20 supply module, a cigarette 7 splicing module and a cutting and discharging module located in the shell, the cigarette 7 splicing module simultaneously docks with the cigarette 7 supply module and the tipping paper 20 supply module, the cigarette 7 splicing module and the tipping paper 20 supply module respectively convey cigarettes 7 and tipping paper 20 to the cigarette 7 splicing module, the cigarette 7 splicing module is used to splice the tipping paper 20 to the surface of the cigarette 7 and wrap the cigarette 7, and the cutting and discharging module is used to cut the spliced ​​cigarettes 7 and send them out of the shell;

[0096] The cigarette 7 supply module includes a feeding drum 10, a first cutting drum 11 and a separation drum 1 which are connected in sequence along the moving direction of the cigarettes 7. The first cutting drum 11 is used to cut the raw cigarette 7 into two cigarettes 7 along the center, and the separation drum 1 is used to separate the two cut cigarettes 7 and adjust the end distance of the two cigarettes 7.

[0097] Furthermore, the separation drum 1 comprises an axially through drum body, the outer surface of which is provided with a plurality of grooves 4, the length direction of the grooves 4 being parallel to the central axis of the drum body, and each of the grooves 4 is filled with two groups of cigarettes 7;

[0098] A negative pressure chamber 2 is provided on the outer side of the drum body in close contact with the surface along the length direction, and the negative pressure chamber 2 covers at least a portion of the groove 4; exhaust holes 5 are respectively provided at both ends of the negative pressure chamber 2, and air is exhausted from the negative pressure chamber 2 through the exhaust holes 5; limiting members 6 are also provided at both ends of the negative pressure chamber 2, and two groups of cigarettes 7 in the same groove 4 move in opposite directions along the length direction of the groove 4 under the action of negative pressure until they hit the limiting members 6 at both ends; while the separation drum 1 rotates, the negative pressure chamber 2 is stationary, and the cigarettes 7 in the groove 4 enter the negative pressure chamber 2 to complete the separation of the cigarettes 7.

[0099] The separation drum 1 provided by the present invention is mainly used in the rubbing and splicing equipment of the countersunk filter 19 cigarettes 7, and its function is to separate and position the cut cigarettes 7, so as to facilitate the subsequent wrapping and fixing of the tipping paper 20, so that the appearance of the products of the same batch remains consistent, and the product defect rate is effectively reduced. The present invention adsorbs the filter 19 cigarettes 7 on the separation drum 1 through the through hole 3. After the cigarettes 7 are cut, they enter the negative pressure chamber 2 with the rotation of the separation drum 1. Under the suction of the exhaust holes 5 at both ends, the negative pressure in the exhaust holes 5 forms a negative pressure adsorption effect on the cigarettes 7, so that the two cigarettes 7 move to the two ends of the groove 4 until they are against the limiter 6. Under the action of the limiter 6 and the negative pressure chamber 2, the cigarettes 7 are separated and accurately positioned.

[0100] Furthermore, a plurality of through holes 3 are formed on the bottom surface of the groove 4, and the through holes 3 are all connected to a negative pressure pipeline 8, through which air is evacuated from the through holes 3, so that the two groups of cigarettes 7 are fixed in the groove 4 under the action of negative pressure.

[0101] Furthermore, the pressure in the negative pressure pipeline 8 is 0.5-1.5 MPa.

[0102] Furthermore, the air extraction hole 5 is externally connected to an air extraction pipeline 9 .

[0103] In the present invention, the negative pressure can be accurately controlled by the air extraction pipeline 9 and the negative pressure pipeline 8 to ensure that the relative position and length of the two cigarettes 7 in each groove 4 are stable and consistent. The pressure range in the air extraction pipeline 9 and the negative pressure pipeline 8 is 0.5-1.5MPa and can be adjusted by corresponding devices.

[0104] Furthermore, after the separation, the distance between the ends of the two groups of cigarettes 7 in the same groove 4 is 4 to 20 mm.

[0105] Furthermore, the tipping paper 20 supply module comprises a tipping paper 20 supply device 12 , a tipping paper 20 slitting device 13 and a tipping paper 20 output device 14 which are sequentially connected along the moving direction of the tipping paper 20 .

[0106] Furthermore, the cigarette 7 splicing module includes a splicing drum 15, and the tipping paper 20 slitting device 13 and the separation drum 1 are simultaneously connected to the splicing drum 15, and the splicing drum 15 is used to wrap two cigarettes 7 with the cut tipping paper 20 at the same time and splice them.

[0107] Furthermore, the slitting and discharging module includes a second slitting drum wheel 16 and a direction adjustment drum wheel 17 which are connected in sequence along the moving direction of the cigarettes 7. The second slitting drum wheel 16 is used to cut the twisted cigarettes 7 along the center to obtain two counter-clockwise filter-tipped cigarettes 7; the direction adjustment drum wheel 17 is used to adjust the two counter-clockwise filter-tipped cigarettes 7 arranged in reverse to achieve the same-direction output.

[0108] In another specific embodiment, the present invention discloses a countersunk filter 19 cigarette 7, wherein the countersunk filter 19 cigarette 7 is prepared by the above-mentioned twisting method, and the countersunk filter 19 cigarette 7 comprises a tobacco segment 18 and a filter 19 located at one end of the tobacco segment 18, at least a partial area of ​​the outer periphery of the filter 19 is wrapped with tipping paper 20, the end of the filter 19 away from the cigarette 7 is a suction end, one end of the tipping paper 20 exceeds the suction end of the filter 19, and a countersunk cavity is formed between the side wall of one end of the tipping paper 20 exceeding the filter 19 and the suction end of the filter 19.

[0109] The countersunk filter 19 cigarette 7 provided by the present invention has a simple structure and a novel form, and the appearance quality of the countersunk cavity is good. The twisting method provided by the present invention solves the appearance defects of the traditional countersunk filter 19 cigarette 7, such as deformation of the countersunk end face, burrs, and stratification, which cannot be overcome. There is no special requirement for the filter rod, and there is no need to provide a cavity or an empty tube composite filter rod. The use of multi-layer filter rod forming paper can avoid the poor wrapping of the filter 19 and the impact on the smoking quality of the cigarette 7. When the cigarette 7 is connected, the filter rod auxiliary materials use a wider range of specifications, and the production process of the countersunk filter rod is omitted, which meets the requirements of mass production. Compared with the traditional production process of the countersunk filter 19 cigarette 7, the defect rate of the cigarette 7 is lower and the quality is more stable under the condition of unchanged production efficiency.

[0110] When smoking, the presence of the countersunk cavity can prevent the smoker's lips from contacting the tar adsorbed on the filter 19 tow, reducing the harm to the body. Before entering the oral cavity, the smoke is retained in the countersunk cavity of the cigarette 7 to a certain extent, and the retained smoke is partially deposited and partially emitted into the air, which can reduce the harm of smoking cigarettes. At the same time, the countersunk cavity can achieve appropriate mixing and cooling of the smoke, settle the impurities, make the aftertaste cleaner, and form a comfortable taste. It can also gather and concentrate the smoke, which is helpful to improve the taste of cigarettes.

[0111] Furthermore, the basis weight of the tipping paper 20 is 30 to 110 g / m 2 .

[0112] Furthermore, the tipping paper 20 has a thickness of 50-150 μm.

[0113] Furthermore, the longitudinal tensile strength of the tipping paper 20 is 6-9 kN / m.

[0114] Furthermore, the transverse tensile strength of the tipping paper 20 is 4-6 kN / m.

[0115] Furthermore, the longitudinal stiffness of the tipping paper 20 is 600-900 mN.

[0116] Furthermore, the transverse stiffness of the tipping paper 20 is 400-700 mN.

[0117] Furthermore, the water absorption of the tipping paper 20 is 20 to 35 g / m 2 .

[0118] Furthermore, the depth of the countersunk cavity is 2 to 10 mm.

[0119] Furthermore, the length of the cigarette 7 with the countersunk filter 19 is 84 to 96 mm.

[0120] Furthermore, the cross-sectional circumference of the countersunk filter 19 cigarette 7 is 16 to 25 mm.

[0121] The applicant declares that the above is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention shall fall within the protection scope and disclosure scope of the present invention.

Claims

1. A method for splicing countersunk filter cigarettes, characterized in that: The splicing method comprises: (I) Raw cigarettes are fed into the first cutting drum wheel one by one from the feeding drum wheel, the middle section of the raw cigarette is the filter section, and the two ends of the filter section have tobacco sections; two cigarettes are cut along the center of the filter section of the raw cigarette to obtain two cigarettes, the filters of the two cigarettes are placed opposite to each other, and the two cut cigarettes are adsorbed and fixed into the groove of the separation drum wheel; the two cigarettes are adsorbed to the two ends of the groove through the negative pressure chamber, so that a gap is formed between the filters of the two cigarettes; while the separation drum wheel rotates, the negative pressure chamber is stationary, and the cigarettes in the groove enter the negative pressure chamber to complete the cigarette separation; (II) while processing the raw material cigarettes, feeding and cutting the tipping paper through the tipping paper supply module; maintaining the gap between the ends of the two cigarettes, feeding the cut tipping paper and the two separated cigarettes into the cigarette splicing module at the same time, and wrapping at least part of the filter tips of the two cigarettes and the gap between the two filter tips with the tipping paper through the cigarette splicing module; (III) The spliced ​​cigarettes are fed into the slitting and discharging module, and the tipping paper at the gap of the wrapping is cut along the center to obtain two counter-point filter cigarettes, and the two counter-point filter cigarettes arranged in reverse are adjusted to achieve the same direction of output; The splicing method is performed using the following cigarette splicing device: The cigarette splicing device comprises a shell, and a cigarette supply module, a tipping paper supply module, a cigarette splicing module and a cutting and discharging module located in the shell, the cigarette splicing module simultaneously docks with the cigarette supply module and the tipping paper supply module, the cigarette supply module and the tipping paper supply module respectively convey cigarettes and tipping paper to the cigarette splicing module, the cigarette splicing module is used to splice the tipping paper to the surface of the cigarette and wrap the cigarette, and the cutting and discharging module is used to cut the spliced ​​cigarettes and send them out of the shell; The cigarette supply module comprises a feeding drum, a first slitting drum and a separation drum which are connected in sequence along the moving direction of the cigarettes, wherein the first slitting drum is used to slit the raw cigarette into two cigarettes along the center, and the separation drum is used to separate the two slitting cigarettes and adjust the distance between the ends of the two cigarettes; The separation drum comprises an axially penetrating drum body, the outer surface of which is provided with a plurality of grooves, the length direction of which is parallel to the central axis of the drum body, and each of which is filled with two cigarettes; A negative pressure chamber is arranged on the outer side of the drum body in close contact with the surface along the length direction, and the negative pressure chamber covers at least a portion of the groove; exhaust holes are respectively provided at both ends of the negative pressure chamber, and air is exhausted from the negative pressure chamber through the exhaust holes; limiting members are also arranged at both ends of the negative pressure chamber, and two cigarettes in the same groove move in opposite directions along the length direction of the groove under the action of negative pressure until they hit the limiting members at both ends; while the separation drum rotates, the negative pressure chamber is stationary, and the cigarettes in the groove enter the negative pressure chamber to complete the cigarette separation.

2. The splicing method according to claim 1, characterized in that: A plurality of through holes are provided on the bottom surface of the groove, and the through holes are all connected to a negative pressure pipeline. Air is evacuated from the through holes through the negative pressure pipeline, so that two cigarettes are fixed in the groove under the action of negative pressure.

3. The splicing method according to claim 2, characterized in that: The pressure in the negative pressure pipeline is 0.5~1.5MPa.

4. The splicing method according to claim 1, characterized in that: The air extraction hole is externally connected to an air extraction pipeline, and the pressure in the air extraction pipeline is 0.5-1.5Mpa.

5. The splicing method according to claim 1, characterized in that: After the separation, the distance between the ends of the two cigarettes in the same groove is 4-20 mm.

6. The splicing method according to claim 1, characterized in that: The tipping paper supply module comprises a tipping paper supply device, a tipping paper cutting device and a tipping paper output device which are sequentially connected along the moving direction of the tipping paper.

7. The splicing method according to claim 6, characterized in that: The cigarette splicing module comprises a splicing drum wheel, the tipping paper slitting device and the separation drum wheel are simultaneously connected to the splicing drum wheel, and the splicing drum wheel is used to wrap two cigarettes with the cut tipping paper at the same time and splice them.

8. The splicing method according to claim 1, characterized in that: The cutting and discharging module includes a second cutting drum wheel and a direction adjustment drum wheel which are connected in sequence along the moving direction of the cigarettes. The second cutting drum wheel is used to cut the twisted and spliced ​​cigarettes along the center to obtain two counter-clockwise filter cigarettes; the direction adjustment drum wheel is used to adjust the direction of two counter-clockwise filter cigarettes arranged in reverse to achieve the same direction output.

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