Embossing folding mechanism and filter stick forming equipment

Abstract

The utility model provides an embossing and folding mechanism and filter stick forming equipment, the embossing and folding mechanism comprises an embossing roller assembly, a comb-shaped forming assembly, a forming roller assembly and a driving roller motor for driving the roller assembly to rotate which are sequentially arranged along the advancing direction of raw material paper, the creasing roller assembly comprises a creasing driving roller and a creasing driven roller which abut against each other and form a first embossing gap for raw material paper to penetrate through in the middle, and the comb-shaped forming assembly comprises an upper comb-shaped forming plate and a lower comb-shaped forming plate which are spliced with each other and form a second embossing gap for the raw material paper to penetrate through in the middle. The paper feeding width of the second embossing gap on the paper feeding side is larger than the paper discharging width of the second embossing gap on the paper discharging side. The forming roller assembly comprises a forming driving roller and a forming driven roller which abut against each other, and a third embossing gap allowing raw material paper to penetrate through is formed between the forming driving roller and the forming driven roller. According to the utility model, the comb-shaped forming component is adopted to carry out gradual embossing folding transition, so that raw material paper is prevented from being damaged, and meanwhile, the embossing folding device can be widely applied to embossing folding of folding type filter elements with different shapes.

Description

Technical Field

[0001] The utility model belongs to the technical field of filter element manufacturing, and particularly relates to a corrugating and folding mechanism and a filter rod forming device. Background Art

[0002] In recent years, with the increasing emphasis on low-harm cigarettes and health and environmental protection by people, the tobacco industry has carried out a series of research on reducing tar and harmful substances. The cigarette filter rod can reduce the release of harmful substances in the smoke through interception, adsorption and other means, which is an important way to reduce tar and harmful substances in cigarettes. The paper filter element is one of the traditional filter element materials, usually made of high-strength cellulose paper, with good filtration efficiency, and can effectively capture tar and harmful substances in the smoke. In order to improve the service life of the filter element, the filter element is generally folded or corrugated to increase the surface area of the filter element. Usually, a reciprocating folding paper folding machine or a drum paper folding machine is used. The reciprocating folding paper folding machine or the drum paper folding machine folds the filter element paper into a Z-shaped corrugation in sequence along the conveying direction. Although the folding height can be adjusted, it is difficult to adjust the corrugation shape of the folding. Content of the Utility Model

[0003] The purpose of the utility model is to solve the deficiencies of the prior art and provide a corrugating and folding mechanism which is convenient for adjusting the corrugation shape of a folded filter element and is not easy to damage the raw material paper.

[0004] To achieve the above object, the technical solution of the utility model is realized as follows:

[0005] Based on one aspect of the utility model, a corrugating and folding mechanism is provided, which includes a corrugating roller assembly, a comb-shaped forming assembly, a forming roller assembly and a driving roller group rotating active roller motor arranged in sequence along the advancing direction of the raw material paper. The corrugating roller assembly includes a corrugating driving roller and a corrugating driven roller which are mutually pressed against each other to form a first corrugating gap for the raw material paper to pass through in the middle. The comb-shaped forming assembly includes a comb-shaped upper forming plate and a comb-shaped lower forming plate which are mutually joined in the middle to form a second corrugating gap for the raw material paper to pass through. And the feeding width of the second corrugating gap on the feeding side is greater than the discharging width on the discharging side. The forming roller assembly includes a forming driving roller and a forming driven roller which are mutually pressed against each other to form a third corrugating gap for the raw material paper to pass through in the middle. The ends of the corrugating driving roller and the forming driving roller are respectively provided with gears driven by the active roller motor, and the mutually pressed driving roller and driven roller rotate towards each other through two meshing gears.

[0006] In one embodiment, the comb-shaped upper forming plate and the comb-shaped lower forming plate are joined together to form a first guiding space and a second guiding space. The first guiding space is directly opposite to the first embossing gap of the creasing roller assembly, and the second guiding space is directly opposite to the third embossing gap of the forming roller assembly. On the inner surfaces of the comb-shaped upper forming plate and the comb-shaped lower forming plate in the first guiding space, a plurality of comb teeth respectively extend and protrude. Moreover, the widths of the plurality of comb teeth gradually become narrower and the heights gradually become higher along the advancing direction of the base paper. In the second guiding space, the plurality of comb teeth extend parallel to each other along the advancing direction of the base paper and the widths and heights thereof remain unchanged.

[0007] In one embodiment, the third embossing gap of the forming roller assembly is formed by the convex teeth on the surfaces of the forming driving roller and the forming driven roller which are staggered with each other, and the folding shape of the third embossing gap is the same as the folding shape of the second guiding space.

[0008] In one embodiment, the embossing and folding mechanism further includes a stabilizing roller assembly arranged behind the forming roller assembly. The stabilizing roller assembly includes a stabilizing driving roller and a stabilizing roller which are tightly abutted against each other in the middle to form a gap for the base paper to pass through. The convex teeth on the surface of the stabilizing driving roller are the same as the convex teeth on the surface of the forming driving roller. A stabilizing roller gear is arranged at the end of the stabilizing driving roller, and the stabilizing roller gear is meshed with the gear at the end of the forming driving roller through an intermediate gear.

[0009] In one embodiment, a synchronous belt pulley is further included. One of the synchronous pulleys of the synchronous belt pulley is connected to the output shaft of the driving roller motor and is coaxial with the gear at the end of the forming driving roller, and the other synchronous pulley of the synchronous belt pulley is coaxial with the gear at the end of the creasing driving roller.

[0010] Based on another aspect of the present invention, a filter rod forming device is provided, which includes the embossing and folding mechanism as described in any one of the above items, and a filter element winding rod mechanism, a forming paper wrapping mechanism and a cutting knife mechanism which are sequentially arranged behind the embossing and folding mechanism. A filter element paper passage groove is extended and arranged along the advancing direction of the base paper in the filter element winding rod mechanism, and a plurality of convex teeth are extended and protruded along the advancing direction of the base paper in the filter element paper passage groove. The convex teeth in the filter element paper passage groove are matched with the folding grooves of the folded base paper. The filter element paper passage groove gradually changes from a horizontal paper feeding groove on the paper feeding side to a circular paper discharging groove on the paper discharging side to complete the rod winding operation. The forming paper wrapping mechanism is used for wrapping the forming paper on the surface of the filter element after folding and rod winding, and the cutting knife mechanism is used for cutting the filter rod wrapped with the forming paper.

[0011] In one embodiment, the filter element winding rod mechanism further includes a guiding mandrel, which is suspended in the filter paper passing groove and extends along the advancing direction of the raw paper. A plurality of ridges are convexly provided on the surface of the guiding mandrel along the advancing direction of the raw paper. The shape and number of the ridges match the shape and number of the folding grooves of the raw paper during the winding rod process. The guiding mandrel is provided with a hollow pipe that penetrates through and is used to spray essence on the filter paper.

[0012] In one embodiment, the filter element winding rod mechanism includes a winding rod backing plate, a winding rod pressing plate, and a winding rod guiding plate. A winding rod groove is concavely provided on the surface of the winding rod backing plate along the advancing direction of the filter paper. The winding rod pressing plate covers the paper feeding side of the winding rod backing plate and is combined with the winding rod groove to form a horizontal paper feeding channel that matches the folding grooves of the filter paper. The winding rod guiding plate covers the paper discharging side of the winding rod backing plate and is combined with the winding rod groove to form a circular paper discharging channel that matches the folding grooves of the filter paper. The winding rod groove gradually changes from a flat groove on the paper feeding side to an arc groove on the paper discharging side. The filter paper passing groove includes the horizontal paper feeding channel and the circular paper discharging channel.

[0013] In one embodiment, a filter element rounding mechanism is further included between the filter element winding rod mechanism and the forming paper wrapping mechanism. The filter element rounding mechanism includes a mounting seat, a pair of rounding wheels, a rounding synchronous belt wheel and a rounding motor for driving the rounding wheels to rotate. The pair of rounding wheels rotate relatively, and a circular channel for the filter element to pass through is formed by the cooperation between the pair of rounding wheels. The circular channel is formed by the cooperation of the arc grooves on the surfaces of the pair of rounding wheels.

[0014] In one embodiment, the forming paper wrapping mechanism includes a cigarette gun and a cigarette gun pressing plate heating component and a cigarette gun pressing plate cooling component that are sequentially arranged along the advancing direction of the filter element. A forming paper winding rod through groove is concavely provided on the cigarette gun along the advancing direction of the filter element. The forming paper winding rod through groove gradually changes from a flat groove to a circular groove. The cutting knife mechanism includes a pallet conveyor belt component and a reciprocating cutting knife component. The pallet conveyor belt component includes a synchronous belt, a synchronous belt driving motor, and a filter rod pallet provided on the synchronous belt. The filter rod pallet is concavely provided with a V-shaped placing groove along the advancing direction of the filter rod, and gaps for cutting the filter rod are equidistantly provided in the V-shaped placing groove. The reciprocating cutting knife component includes a blade, a tool head motor for driving the blade to rotate at a high speed, a tool head cylinder for controlling the up and down movement of the blade, and a screw rod transmission component for driving the blade to move along the advancing direction of the filter rod.

[0015] Compared with the prior art, in the embossing and folding mechanism of the present utility model, the filter paper raw material enters the comb-shaped forming assembly after being pre-creased by the creasing roller assembly. The gradually changing convex teeth with gradually narrowing tooth widths and gradually increasing tooth heights in the comb-shaped upper forming plate and the comb-shaped lower forming plate gradually press and fold the pre-creased filter paper raw material into a tooth shape. The pressed and folded filter paper raw material is further formed into a toothed paper tape by the forming roller assembly. While the forming roller assembly forms the paper tape, it provides forward power for the paper tape. The formed toothed paper tape enters the filter element winding rod mechanism through the positioning of the stabilizing roller assembly. The gradually changing convex teeth of the comb-shaped forming assembly gradually press and fold the pre-creased filter paper raw material into a tooth shape, playing a transitional role of gradual pressing and folding, making the obtained tooth-shaped creases more uniform and standard, and avoiding the filter paper raw material directly entering the forming roller assembly for large-scale pressing and folding after being pre-creased by the creasing roller assembly, which can effectively prevent the raw material paper from being damaged due to sudden stress during creasing. At the same time, by adjusting the specific tooth shapes of the comb-shaped forming assembly and the forming roller assembly, the specific shape of the folding grooves of the folding filter element can be adjusted, and it can be widely applied to the embossing and folding of folding filter elements with different shapes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of a hollow folding filter rod;

[0017] Figure 2 is Figure 1 a schematic structural diagram of the hollow folding filter rod shown from another angle;

[0018] Figure 3 is an overall structure diagram of a forming device for a hollow folding filter rod according to an embodiment of the present utility model;

[0019] Figure 4 is Figure 3 a schematic structural diagram of the embossing and folding mechanism in the forming device for the hollow folding filter rod shown;

[0020] Figure 5 In FIG. (5a), Figure 4 is a schematic structural diagram of the creasing roller assembly in the embossing and folding mechanism shown, and FIG. (5b) is a sectional structural diagram of the creasing roller assembly;

[0021] Figure 6 is Figure 4 a schematic structural diagram of the comb-shaped forming assembly in the embossing and folding mechanism shown;

[0022] Figure 7 is Figure 6 an enlarged structural diagram of part A in the comb-shaped forming assembly shown;

[0023] Figure 8 In FIG. (8a), Figure 6 is a schematic structural diagram of the comb-shaped upper forming plate in the comb-shaped forming assembly shown, and FIG. (8b) is Figure 6Schematic structural diagram of the lower comb-shaped forming plate in the shown comb-shaped forming assembly;

[0024] Figure 9 In the middle figure (9a) is Figure 4 Schematic structural diagram of the forming roller assembly in the shown embossing and folding mechanism, and figure (9b) is the sectional structural diagram of the forming roller assembly;

[0025] Figure 10 In the middle figure (10a) is Figure 4 Schematic structural diagram of the stabilizing roller assembly in the shown embossing and folding mechanism, and figure (10b) is the sectional structural diagram of the stabilizing roller assembly;

[0026] Figure 11 Schematic diagram of the shape of the filter paper after being folded by the embossing and folding mechanism;

[0027] Figure 12 Is Figure 3 Schematic structural diagram of the filter element winding rod mechanism in the shown hollow folded filter rod forming equipment;

[0028] Figure 13 Is Figure 12 Schematic structural diagram of the winding rod backing plate in the shown filter element winding rod mechanism;

[0029] Figure 14 Is Figure 13 Enlarged structural diagram of part B in the shown winding rod backing plate;

[0030] Figure 15 Is Figure 12 Schematic structural diagram of the winding rod pressing plate and the winding rod guide plate in the shown filter element winding rod mechanism at another angle; among them, figure (15a) is the winding rod pressing plate, figure (15b) is the first winding rod guide plate, figure (15c) is the second winding rod guide plate, and figure (15d) is the third winding rod guide plate;

[0031] Figure 16 Is Figure 12 Schematic structural diagram of the guiding mandrel in the shown filter element winding rod mechanism;

[0032] Figure 17 Is Figure 3 Schematic structural diagram of the filter element rounding mechanism in the shown hollow folded filter rod forming equipment;

[0033] Figure 18 Is Figure 3 Schematic structural diagram of the forming paper wrapping mechanism in the shown hollow folded filter rod forming equipment;

[0034] Figure 19 Is Figure 3 Schematic structural diagram of the cutter mechanism in the shown hollow folded filter rod forming equipment;

[0035] Figure 20 IsFigure 19 Schematic structural diagram of the pallet conveyor belt assembly in the shown cutter mechanism;

[0036] Figure 21 For Figure 19 Schematic structural diagram of the reciprocating cutter assembly in the shown cutter mechanism.

[0037] Description of reference numerals: 101 Forming paper, 103 Folded filter element, 1031 Folding unit, 1033 Folding groove, 1 Embossing and folding mechanism, 11 Creasing roller assembly, 111 Creasing driving roller, 112 Creasing driven roller, 113 Creasing driving roller gear, 12 Comb-shaped forming assembly, 121 Comb-shaped upper forming plate, 122 Comb-shaped lower forming plate, 123 Comb teeth, 124 Second guiding space, 13 Forming roller assembly, 131 Forming driving roller, 132 Forming driven roller, 133 Forming driving roller gear, 14 Stabilizing roller assembly, 141 Stabilizing driving roller, 142 Idle roller, 143 Stabilizing roller gear, 145 Intermediate gear, 15 Driving roller motor, 16 Synchronous belt pulley, 17 Coupling, 18 Compression block, 19 Embossing and folding mechanism frame, 191 Frame cover plate, 2 Filter element winding rod mechanism, 21 Winding rod backing plate, 211 Winding rod groove, 22 Winding rod pressing plate, 23 Winding rod guide plate, 231 V-shaped opening, 232 Winding rod guide plate 1, 233 Winding rod guide plate 2, 234 Winding rod guide plate 3, 24 Guiding mandrel, 241 Rib, 243 Hollow pipe, 245 Fixed section, 247 Guiding section, 25 Filter element paper passing slot, 26 Mandrel support, 3 Filter element rounding mechanism, 31 Mounting seat, 32 Rounding wheel, 33 Rounding synchronous belt pulley, 34 Rounding motor, 4 Forming paper wrapping mechanism, 41 Tobacco rod, 411 Forming paper winding rod through slot, 42 Tobacco rod pressing plate heating assembly, 43 Tobacco rod pressing plate cooling assembly, 5 Cutter mechanism, 51 Pallet conveyor belt assembly, 511 Synchronous belt, 512 Synchronous belt driving motor, 513 Filter rod pallet, 514 V-shaped placement groove, 515 Synchronous belt driving pulley, 516 Synchronous belt driven pulley, 517 Mounting plate, 52 Reciprocating cutter assembly, 521 Blade, 522 Cutter head motor, 523 Cutter head cylinder, 524 Lead screw, 525 Lead screw motor, 6 Filter element paper, 7 Forming paper, 8 Filter rod. Detailed implementation manners

[0038] As Figure 3-21 shown, this embodiment provides a filter rod forming device for manufacturing a hollow folded filter rod as shown in Figure 1 and Figure 2 shown, which includes an embossing and folding mechanism 1, a filter element winding rod mechanism 2, a filter element rounding mechanism 3, a forming paper wrapping mechanism 4, and a cutter mechanism 5 arranged in sequence.

[0039] In this embodiment, the embossing and folding mechanism 1 includes a creasing roller assembly 11, a comb-shaped forming assembly 12, a forming roller assembly 13, a stabilizing roller assembly 14, a driving roller motor 15 for driving the rotation of the roller group, and a synchronous pulley 16, which are arranged in sequence along the advancing direction of the filter paper. The creasing roller assembly 11 includes a creasing driving roller 111 and a creasing driven roller 112 that are tightly abutted against each other in the middle to form a corrugated gap (i.e., the first embossing gap) for the filter paper to pass through. The comb-shaped forming assembly 12 includes a comb-shaped upper forming plate 121 and a comb-shaped lower forming plate 122 that are joined together in the middle to form a comb-tooth-shaped gap (i.e., the second embossing gap) for the filter paper to pass through. The feeding width of the comb-tooth-shaped gap on the paper feeding side is greater than the paper discharging width on the paper discharging side. The forming roller assembly 13 includes a forming driving roller 131 and a forming driven roller 132 that are tightly abutted against each other in the middle to form a tooth-shaped gap (i.e., the third embossing gap) for the filter paper to pass through. The stabilizing roller assembly 14 includes a stabilizing driving roller 141 and a single roller 142 that are tightly abutted against each other in the middle to form a gap for the filter paper to pass through. The convex teeth on the surface of the stabilizing driving roller 141 are the same as the convex teeth on the surface of the forming driving roller 131.

[0040] Specifically, the comb-shaped upper forming plate 121 and the comb-shaped lower forming plate 122 are joined together to form a first guiding space and a second guiding space. The first guiding space is opposite to the corrugated gap of the creasing roller assembly 11, and the second guiding space is opposite to the tooth-shaped gap of the forming roller assembly 13. Inside the first guiding space, a plurality of comb teeth 123 are respectively protruded from the inner surfaces of the comb-shaped upper forming plate 121 and the comb-shaped lower forming plate 122. The tooth width of the plurality of comb teeth 123 gradually becomes narrower and the tooth height gradually becomes higher along the advancing direction of the filter paper. Inside the second guiding space, the plurality of comb teeth 123 extend parallel to each other along the advancing direction of the filter paper and the tooth width and tooth height remain unchanged. The tooth-shaped gap of the forming roller assembly 13 is formed by the convex teeth on the surfaces of the forming driving roller 131 and the forming driven roller 132 that are interlaced with each other, and the folding shape of the tooth-shaped gap is the same as the folding shape of the second guiding space.

[0041] In this embodiment, a creasing driving roller gear 113 is provided at the end of the creasing driving roller 111, and a forming driving roller gear 133 is provided at the end of the forming driving roller 131. Correspondingly, a driven gear meshing with the creasing driving roller gear 113 is provided at the end of the creasing driven roller 112, and a driven gear meshing with the forming driving roller gear 133 is provided at the end of the forming driven roller 132. One of the synchronous pulleys of the synchronous pulley 16 is connected to the output shaft of the driving roller motor 15 and coaxially drives the creasing driving roller gear 113, and the other synchronous pulley of the synchronous pulley 16 coaxially drives the forming driving roller gear 133. The driving roller and the driven roller that are tightly abutted against each other rotate in opposite directions through two meshing gears. A stabilizing roller gear 143 is provided at the end of the stabilizing driving roller 141, and the stabilizing roller gear 143 is meshed with the forming driving roller gear 133 at the end of the forming driving roller 131 through an intermediate gear 145. The driving roller motor 15 is a reduction motor, and a coupling 17 is used to transmit power to the creasing driving roller gear 113.

[0042] In the embossing and folding mechanism 1, the cellulose paper tape raw material enters the comb-shaped forming assembly 12 after being pre-creased by the creasing roller assembly 11. A section of gradually changing trapezoidal teeth with gradually narrowing tooth widths and gradually increasing tooth heights in the comb-shaped upper forming plate 121 and the comb-shaped lower forming plate 122 gradually press and fold the pre-creased cellulose paper tape into a tooth shape. The pressed and folded cellulose paper tape is further formed into a toothed paper tape by the forming roller assembly 13. While the forming roller assembly 13 forms the paper tape, it provides forward power for the paper tape. The formed toothed paper tape enters the filter element winding rod mechanism 2 through the positioning of the stabilizing roller assembly 14. The gradually changing trapezoidal teeth of the comb-shaped forming assembly 12 gradually press and fold the pre-creased cellulose paper tape into a tooth shape, playing a transitional role of gradual pressing and folding, making the obtained tooth-shaped creases more uniform and standard, and avoiding the direct entry of the cellulose paper tape raw material into the forming roller assembly 13 for large-scale pressing and folding after being pre-creased by the creasing roller assembly 11. It can effectively prevent the raw material paper from being damaged due to sudden stress during creasing. At the same time, by adjusting the specific tooth shapes of the comb-shaped forming assembly 12 and the forming roller assembly 13, the specific shape of the folding grooves of the folded filter element can be adjusted, and it can be widely applied to the embossing and folding of folded filter elements with different shapes.

[0043] In this embodiment, the filter element winding rod mechanism 2 includes a winding rod main body and a guiding mandrel 24. Inside the winding rod main body, a filter paper passage groove 25 is arranged along the advancing direction of the filter paper. A number of convex teeth are protruded along the advancing direction of the filter paper in the filter paper passage groove 25. The filter paper passage groove 25 gradually changes from a horizontal paper inlet groove on the paper inlet side to a circular paper outlet groove on the paper outlet side to complete the winding rod operation of the filter paper. The number of convex teeth is the same as the number of folding grooves of the filter paper before winding. The guiding mandrel 24 is suspended in the filter paper passage groove 25 and extends along the advancing direction of the filter paper. A number of convex strips 241 are protruded on the surface of the guiding mandrel 24 along the advancing direction of the filter paper. The shapes and numbers of the convex strips 241 match the shapes and numbers of the folding grooves of the filter paper during the winding process. The guiding mandrel 24 is provided with a hollow pipe 243 for spraying essence onto the filter paper.

[0044] Specifically, the reel body includes a reel backing plate 21, a reel pressing plate 22, and a reel guiding plate 23. A reel groove 211 is recessed on the surface of the reel backing plate 21 and extends along the advancing direction of the filter paper. The reel pressing plate 22 covers the paper feeding side of the reel backing plate 21 and fits with the reel groove 211 to form a horizontal paper feeding channel matching the folding groove of the filter paper. The reel guiding plate 23 covers the paper discharging side of the reel backing plate 21 and fits with the reel groove 211 to form a circular paper discharging channel matching the folding groove of the filter paper. The reel groove 211 gradually changes from a planar groove on the paper feeding side to an arc groove on the paper discharging side. The horizontal paper feeding channel and the circular paper discharging channel are respectively part of the filter paper passing groove 25. The reel guiding plate 23 is composed of a first reel guiding plate 232, a second reel guiding plate 233, and a third reel guiding plate 234. A V-shaped opening 231 is formed on the reel guiding plate 23 to guide the guiding mandrel 24 to extend into the filter paper passing groove 25 from the V-shaped opening 231. The guiding mandrel 24 includes a fixed section 245 detachably connected to the mandrel bracket 26 and a guiding section 247 suspended in the filter paper passing groove 25. The mandrel bracket 26 is installed outside the reel body and the fixed section 245 is suspended above the filter paper passing groove 25. The fixed section 245 and the guiding section 247 are connected in an L shape.

[0045] In the filter paper reel mechanism 2, the surfaces of the reel backing plate 21 and the reel pressing plate 22 are distributed with gradually changing trapezoidal teeth. The starting ends of the trapezoidal teeth are distributed in a planar shape, and the tail ends are distributed in a circular shape. The latter half of the guiding section 247 of the guiding mandrel 24 is set as a cross-shaped mandrel. Figure 11 After the filter paper in the shape shown enters the filter paper passing groove 25, it gradually rolls up and wraps the guiding mandrel 24 along with the change of the tooth shape in the filter paper passing groove 25 and finally forms a folded filter paper round rod. There is a hollow pipe 243 in the center of the guiding mandrel 24, and flavors and the like can be sprayed in the center of the filter paper round rod according to production needs. By adjusting the shape and distribution of the convex teeth in the filter paper passing groove 25, the filter paper reel mechanism 2 can be applied to the reel operation of filter papers with different-shaped folding grooves.

[0046] In this embodiment, the filter paper rounding mechanism 3 includes a mounting base 31, a pair of rounding wheels 32, a rounding synchronous pulley 33 for driving the rounding wheels 32 to rotate, and a rounding motor 34. The pair of rounding wheels 32 rotate relatively, and a circular channel for the filter paper to pass through is formed by the cooperation between the pair of rounding wheels 32. The circular channel is formed by the cooperation of the arc grooves on the surfaces of the pair of rounding wheels 32.

[0047] In this embodiment, the forming paper wrapping mechanism 4 includes a cigarette gun 41, and a cigarette gun pressing plate heating assembly 42 and a cigarette gun pressing plate cooling assembly 43 arranged in sequence along the advancing direction of the filter element. A forming paper roll rod through groove 411 is recessed on the cigarette gun 41 and extends along the advancing direction of the filter element. The forming paper roll rod through groove 411 gradually changes from a flat groove to a circular groove, so as to wrap the forming paper 7 on the surface of the filter element round rod during the advancing process of the filter element round rod. An adhesive is preset at the lap of the forming paper 7. The cigarette gun pressing plate heating assembly 42 heats the adhesive at the lap to bond it, and the cigarette gun pressing plate cooling assembly 43 cools and cures the bonded adhesive at the lap.

[0048] In this embodiment, the cutter mechanism 5 includes a pallet conveyor belt assembly 51 and a reciprocating cutter assembly 52. The pallet conveyor belt assembly 51 includes a synchronous belt 511, a synchronous belt drive motor 512, and a filter rod pallet 513 arranged on the synchronous belt 511. A V-shaped placement groove 514 is recessed on the filter rod pallet 513 along the advancing direction of the filter rod, and gaps for cutting the filter rod are equidistantly arranged on the V-shaped placement groove 514, so that when the blade cuts downwards, it just falls between the gaps, avoiding the problem of blade collision when the cutter rotates at high speed and cuts downwards. The reciprocating cutter assembly 52 includes a blade 521, a cutter head motor 522 that drives the blade 521 to rotate at high speed, a cutter head cylinder 523 that controls the up and down movement of the blade 521, and a lead screw transmission assembly that drives the blade 521 to move along the advancing direction of the filter rod. The lead screw transmission assembly includes a lead screw 524 and a lead screw motor 525.

[0049] The production method of the hollow folding type filter rod forming equipment in this embodiment includes the following steps:

[0050] Step 1: The cellulose paper tape enters the embossing and folding mechanism 1 for embossing and folding into a specific tooth shape;

[0051] Step 2: The folded filter element paper enters the filter element roll rod mechanism 2 to form a hollow folding type filter element;

[0052] Step 3: The formed hollow folding type filter element enters the rounding mechanism 3 to accelerate and round the filter element;

[0053] Step 4: The hollow folding type filter element enters the wrapping and forming mechanism 4 to be externally wrapped with forming paper to form a hollow folding type filter rod;

[0054] Step 5: The hollow folding type filter rod enters the cutter mechanism 5 for cutting to obtain filter rods of the required length.

[0055] The hollow-folded filter rod forming equipment of this embodiment manufactures a hollow-folded filter rod, which includes a forming paper 101 wrapping a filter element and a folded filter element 103 with a flower-shaped through-hole formed axially. The folded filter element 103 is a paper rod formed by folding a cellulose paper after embossing. The flower-shaped through-hole is surrounded by a number of folding units 1031 connected in series to form a ring. The cross-section of the folding unit 1031 perpendicular to the axial direction is trapezoidal, and the lower base of the trapezoid is in contact with the forming paper 101. The forming paper 101 of the wrapping layer is formed by adhesively bonding two forming papers with a dislocation, and the surface of the folded filter element 103 is sprayed with essence and flavor. This hollow-folded filter rod meets the low filtration and flue gas cooling functions required for low-temperature cigarette filter rods. The folded filter element 103 forms a flower-shaped cavity axially. Before the flue gas enters the oral cavity, there will be a certain residence in the cavity. Some of the retained flue gas will be deposited, and some will be dispersed into the air, which can reduce harm. The forming paper 101 is formed by adhesively bonding two forming papers with a dislocation, and after the forming paper completes the wrapping, it is adhesively bonded at the dislocation by lap joint glue. The dislocation lap joint design of the outer wrapping layer improves the roundness of the filter rod and avoids the convexity at the lap joint position. The flower-shaped through-hole of the folded filter element 103 can divide the flue gas into several cavities for circulation, which is beneficial to the reduction of flue gas temperature. The cavity design makes the contact area between the filter element and the flue gas larger. At the same time, the hollow part can gather the flue gas without divergence, which has a certain improvement in improving the taste of cigarettes. At the same time, the flower-shaped cavity greatly increases the spraying area of essence and flavor, which is convenient for flavoring and can make the aroma release evenly, and has a great improvement in the suction taste. In addition, the cross-section of the folding unit 1031 is trapezoidal, and such a folding groove shape is more supportive, and it is also better processed and more feasible in terms of technology. The raw material paper of the filter element uses cellulose paper. Compared with the characteristic that cellulose paper is naturally degradable compared with acetate fiber tow, it can reduce environmental pollution without affecting the smoking quality of cigarettes.

[0056] The filter rod forming equipment of the present utility model manufactures a hollow-folded filter rod that meets the low filtration and flue gas cooling functions required for low-temperature cigarette filter rods. The folded filter element forms a flower-shaped cavity axially. The flower-shaped through-hole of the folded filter element can divide the flue gas into several cavities for circulation. Before the flue gas enters the oral cavity, there will be a certain residence in the cavity, which is beneficial to the reduction of flue gas temperature. Some of the retained flue gas will be deposited, and some will be dispersed into the air, which can reduce harm. The cavity design makes the contact area between the filter element and the flue gas larger. At the same time, the hollow part can gather the flue gas without divergence, which has a certain improvement in improving the taste of cigarettes. At the same time, the flower-shaped cavity greatly increases the spraying area of essence and flavor, which is convenient for flavoring and can make the aroma release evenly, and has a great improvement in the suction taste. By simply adjusting the specific tooth shape of the embossing and folding mechanism and adjusting the convex tooth shape and distribution of the filter element winding rod mechanism, the specific shape of the folding groove of the folded filter element produced by the hollow-folded filter rod forming equipment can be adjusted, and it can be widely applied to the production of folded filter elements with different shapes.

[0057] Those of ordinary skill in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; under the concept of this application, the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments in this application as described above, and for the sake of brevity, they are not provided in detail.

[0058] One or more embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of this application shall be included within the scope of protection of this application.

Claims

1. A embossing and folding mechanism, characterized in that, It includes a creasing roller assembly (11), a comb-shaped forming assembly (12), a forming roller assembly (13), and a main roller motor (15) that drives the rotation of the roller group, which are arranged in sequence along the advancing direction of the base paper. The creasing roller assembly (11) includes a creasing driving roller (111) and a creasing driven roller (112) that are tightly pressed against each other to form a first embossing gap for the base paper to pass through in the middle. The comb-shaped forming assembly (12) includes a comb-shaped upper forming plate (121) and a comb-shaped lower forming plate (122) that are joined together in the middle to form a second embossing gap for the base paper to pass through, and the feeding width of the second embossing gap on the feeding side is greater than the discharging width on the discharging side. The forming roller assembly (13) includes a forming driving roller (131) and a forming driven roller (132) that are tightly pressed against each other to form a third embossing gap for the base paper to pass through in the middle. Gears driven by the main roller motor (15) are respectively provided at the ends of the creasing driving roller (111) and the forming driving roller (131), and the driving roller and the driven roller that are tightly pressed against each other rotate in opposite directions through two meshing gears.

2. The embossing and folding mechanism according to claim 1, wherein The comb-shaped upper forming plate (121) and the comb-shaped lower forming plate (122) are joined together to form a first guiding space and a second guiding space. The first guiding space is opposite to the first embossing gap of the creasing roller assembly (11), and the second guiding space is opposite to the third embossing gap of the forming roller assembly (13). A number of comb teeth (123) are respectively protruded and extended on the inner surfaces of the comb-shaped upper forming plate (121) and the comb-shaped lower forming plate (122) in the first guiding space, and the tooth widths of the number of comb teeth (123) gradually become narrower and the tooth heights gradually become higher along the advancing direction of the base paper. In the second guiding space, the number of comb teeth (123) extends parallelly along the advancing direction of the base paper and the tooth widths and tooth heights remain unchanged.

3. The embossing and folding mechanism according to claim 2, wherein The third embossing gap of the forming roller assembly (13) is formed by the cooperation of the convex teeth on the surface of the forming driving roller (131) and the surface of the forming driven roller (132), and the folding shape of the third embossing gap is the same as the folding shape of the second guiding space.

4. The embossing and folding mechanism according to any one of claims 1-3, characterized in that, The embossing and folding mechanism (1) further includes a stabilizing roller assembly (14) arranged behind the forming roller assembly (13). The stabilizing roller assembly (14) includes a stabilizing driving roller (141) and a single roller (142) that are tightly pressed against each other to form a gap for the base paper to pass through in the middle. The convex teeth on the surface of the stabilizing driving roller (141) are the same as the convex teeth on the surface of the forming driving roller (131). A stabilizing roller gear (143) is provided at the end of the stabilizing driving roller (141), and the stabilizing roller gear (143) is meshed with the gear at the end of the forming driving roller (131) through an intermediate gear (145).

5. The embossing and folding mechanism according to any one of claims 1-3, characterized in that, It further includes a synchronous pulley (16). One of the synchronous pulleys of the synchronous pulley (16) is connected to the output shaft of the main roller motor (15) and is coaxial with the gear at the end of the forming driving roller (131), and the other synchronous pulley of the synchronous pulley (16) is coaxial with the gear at the end of the creasing driving roller (111).

6. A filter rod forming device, characterized in that, It includes a embossing and folding mechanism (1) as described in any one of claims 1 - 5, a filter element winding rod mechanism (2), a forming paper wrapping mechanism (4), and a cutting knife mechanism (5) arranged in sequence after the embossing and folding mechanism (1). A filter element paper passage groove (25) is arranged in the filter element winding rod mechanism (2) along the advancing direction of the raw material paper, and a number of convex teeth are protruded along the advancing direction of the raw material paper in the filter element paper passage groove (25). The convex teeth in the filter element paper passage groove (25) match the folding grooves of the folded raw material paper. The filter element paper passage groove (25) gradually changes from a horizontal paper - feeding groove on the paper - feeding side to a circular paper - discharging groove on the paper - discharging side to complete the winding rod operation. The forming paper wrapping mechanism (4) is used to wrap the forming paper on the surface of the filter element after folding and winding the rod, and the cutting knife mechanism (5) is used to cut the filter rod wrapped with the forming paper.

7. The filter rod forming device according to claim 6, characterized in that, The filter element winding rod mechanism (2) further includes a guiding mandrel (24). The guiding mandrel (24) is suspended in the filter element paper passage groove (25) and extends along the advancing direction of the raw material paper. A number of convex strips (241) are protruded on the surface of the guiding mandrel (24) along the advancing direction of the raw material paper. The shape and quantity of the convex strips (241) match the shape and quantity of the folding grooves of the raw material paper during the winding rod process. The guiding mandrel (24) is provided with a hollow pipe (243) for spraying essence onto the filter element paper and penetrating through it.

8. The filter rod forming device according to claim 7, characterized in that, The filter element winding rod mechanism (2) includes a winding rod backing plate (21), a winding rod pressing plate (22), and a winding rod guiding plate (23). A winding rod groove (211) is recessed on the surface of the winding rod backing plate (21) along the advancing direction of the filter element paper. The winding rod pressing plate (22) covers the paper - feeding side of the winding rod backing plate (21) and is combined with the winding rod groove (211) to form a horizontal paper - feeding channel matching the folding grooves of the filter element paper. The winding rod guiding plate (23) covers the paper - discharging side of the winding rod backing plate (21) and is combined with the winding rod groove (211) to form a circular paper - discharging channel matching the folding grooves of the filter element paper. The winding rod groove (211) gradually changes from a flat groove on the paper - feeding side to an arc groove on the paper - discharging side. The filter element paper passage groove (25) includes the horizontal paper - feeding channel and the circular paper - discharging channel.

9. The filter rod forming device according to any one of claims 6-8, characterized in that, It further includes a filter element rounding mechanism (3) arranged between the filter element winding rod mechanism (2) and the forming paper wrapping mechanism (4). The filter element rounding mechanism (3) includes a mounting seat (31), a pair of rounding wheels (32), a rounding synchronous belt wheel (33) and a rounding motor (34) for driving the rounding wheels (32) to rotate. The two rounding wheels (32) arranged in a pair rotate relatively, and a circular channel for the filter element to pass through is formed by the cooperation between the two rounding wheels (32). The circular channel is formed by the cooperation of the arc grooves on the surfaces of the two rounding wheels (32) arranged in a pair.

10. The filter rod forming device according to any one of claims 6-8, characterized in that The formed paper wrapping mechanism (4) includes a cigarette gun (41) and a cigarette gun pressing plate heating assembly (42) and a cigarette gun pressing plate cooling assembly (43) arranged in sequence along the advancing direction of the filter element. A formed paper roll rod through groove (411) is recessed on the cigarette gun (41) and extends along the advancing direction of the filter element. The formed paper roll rod through groove (411) gradually changes from a flat groove to a circular groove. The cutter mechanism (5) includes a pallet conveyor belt assembly (51) and a reciprocating cutter assembly (52). The pallet conveyor belt assembly (51) includes a synchronous belt (511), a synchronous belt drive motor (512), and a filter rod pallet (513) arranged on the synchronous belt (511). A V-shaped placement groove (514) is recessed on the filter rod pallet (513) along the advancing direction of the filter rod, and gaps for cutting the filter rod are equidistantly arranged in the V-shaped placement groove (514). The reciprocating cutter assembly (52) includes a blade (521), a cutter head motor (522) that drives the blade (521) to rotate at high speed, a cutter head cylinder (523) that controls the up and down movement of the blade (521), and a lead screw drive assembly that drives the blade (521) to move along the advancing direction of the filter rod.

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