A device for synchronous gluing of cigarette tipping paper in different areas

Abstract

The present invention provides a device for synchronous gluing of cigarette tipping paper in different regions, comprising a frame, a rotary glue dispensing valve fixed on the frame, a plate-type slit nozzle embedded in the outer circle of the rotary glue dispensing valve, and a tipping paper tape guide roller and an eccentric roller installed on the frame and respectively located at the input and output sides of the plate-type slit nozzle. By separately setting the gluing paths of the continuous gluing area and the intermittent gluing area, and controlling the glue supply paths of the two areas respectively, synchronous and accurate gluing of the continuous gluing area and the intermittent gluing area is achieved, and the glue will not cover or block the tipping paper air holes in the intermittent gluing area. At the same time, the matching clearance between the rotor and the stator can be appropriately widened, effectively avoiding the glue volatilization and condensation of the glue due to frictional heat in the gluing parts, blocking the nozzle and causing glue breakage, thereby ensuring the gluing quality.

Description

Technical Field

[0001] The invention relates to a gluing device, in particular to a gluing device which enables glue to be transported under fully enclosed conditions and forms a predetermined glue pattern on tipping paper by spraying through a nozzle at the terminal, belonging to the technical field of cigarette production. Background Art

[0002] In the process of manufacturing filter cigarettes, it is necessary to use glued tipping paper sheets to wrap and connect the paired filter tips and cigarette rods to form two parallel long cigarettes. The processing flow of the tipping paper supply system associated with this is: on the tipping paper that has been unrolled, glue is applied according to the pre-set glue pattern, and then cut into paper sheets to supply the tipping drum to complete the wrapping and connection of the filter tips and cigarette rods. With the increase in the production speed of the cigarette machine, the gluing speed of the tipping paper is required to increase accordingly, which brings great difficulty to the gluing of the tipping paper. Once there are gluing defects such as excessive gluing, insufficient gluing, misaligned gluing, and uneven gluing thickness, the cigarette machine will remove the tipping paper sheets with gluing defects and the matching cigarette rods and filter tips, resulting in a large amount of material waste. On the other hand, in order to improve the production efficiency of the unit, it is also required that the gluing equipment is pollution-free during the gluing process, the equipment is easy to use and maintain, and the product specifications and process parameters can be adjusted quickly.

[0003] The prior art for gluing the tipping paper includes: spraying gluing, such as Chinese patent CN1192726C discloses a "device and method for gluing rod-shaped article wrapping materials in tobacco processing industry", which is to first deliver pressurized glue to a multi-way rotary on-off valve through a pipeline, and then send it to a distributor to spray the glue on the gluing surface of the tipping paper, wherein: the multi-way rotary on-off valve mainly has a plurality of raised teeth or bosses at different positions on the circumference of its rotor, and when the rotor rotates, the teeth or bosses at different positions successively open and close the corresponding glue supply pipeline of the distributor, so that a glue area and a glue-free area are formed on the gluing surface of the tipping paper, thereby forming a predetermined glue pattern. The disadvantage of this method is that the glue in the cavity between the rotor and the stator, which rotates at a speed of up to 1400rpm, will generate eddy currents and agitation due to the high-speed rotation of the rotor, causing the glue pressure at the distributor outlet to be in an unstable state, resulting in inconsistent glue coating thickness in the longitudinal direction of the paper sheet; on the other hand, it is difficult to ensure the coaxiality of the rotor and the stator due to insufficient precision in parts processing and assembly, and the extremely small matching clearance between the high-speed rotating rotor and the stator causes friction. Furthermore, the dynamic seal on the drive shaft side will generate a large amount of heat at the gluing part, causing the moisture of the residual glue at the nozzle mouth to evaporate and condense, ultimately leading to gluing interruption. In addition, the water hammer effect caused by the rapid on and off of the glue supply circuit will reduce the service life of the hydraulic components. Therefore, it is necessary to improve the existing technology. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a cigarette tipping paper area-by-area synchronous gluing device, which sets the gluing area of ​​the tipping paper into a continuous gluing area and an intermittent gluing area according to the conveying direction of the tipping paper, and sets the gluing pipelines of the two areas separately and controls them separately, so as to coordinately operate the two gluing pipes to synchronously and accurately gluing the continuous gluing area and the intermittent gluing area.

[0005] The present invention is completed by the following technical scheme: a device for synchronously gluing cigarette tipping paper in different regions, comprising a frame, a rotary glue dispensing valve fixed on the frame, a plate-type slit nozzle embedded in the outer circle of the rotary glue dispensing valve, and a tipping paper tape guide roller and an eccentric roller installed on the frame and respectively located at the input and output sides of the plate-type slit nozzle, characterized in that:

[0006] The plate-type slit nozzle comprises a die and a cover plate, wherein the die is provided with at least one group of glue nozzles consisting of a continuous glue groove and an intermittent glue groove, wherein the top of the continuous glue groove is provided with a continuous glue outlet slit connected thereto, and the top and bottom of the intermittent glue groove are respectively provided with an intermittent glue outlet slit and an intermittent glue inlet hole connected thereto, and the cover plate is provided with a continuous glue inlet slit whose inner end is connected to the continuous glue groove on the die and whose outer end is connected to a continuous glue supply branch pipe independent of the outside of the rotary dispensing valve;

[0007] The rotary dispensing valve comprises a stator with an axial hole therein and a rotor arranged in the stator axial hole, wherein:

[0008] The stator is provided with an intermittent glue inlet hole, the inner end of which is connected to the shaft hole of the stator, and the outer end is connected to the intermittent glue supply branch pipe. A radial glue outlet hole is provided on the wall of the stator shaft hole, and the upper end of the radial glue outlet hole is connected to the lower end of the intermittent glue inlet hole on the plate-type slit nozzle die;

[0009] The rotor consists of an opening and closing section in the middle, a sealing section at one end and a screw conveying section at the other end, and the rotor shaft diameter of the screw conveying section is smaller than the diameter of the opening and closing section, and a plurality of evenly distributed axial holes and radial holes connected to the axial holes are arranged at intervals on the outer cylindrical surface of the rotor located in the opening and closing section, and the radial holes are discontinuously connected to the lower ends of the corresponding radial glue outlet holes on the stator shaft hole wall, one end of each axial hole is closed, and the other end is set to be open and connected to the stator shaft hole; or a plurality of evenly distributed axial grooves are arranged at intervals on the outer cylindrical surface of the rotor located in the opening and closing section, and the axial grooves are discontinuously connected to the lower ends of the corresponding radial glue outlet holes on the stator shaft hole wall, one end of each axial groove is closed, and the other end is set to be open and connected to the stator shaft hole.

[0010] At least one continuous gluing groove is provided on the plate-type slit nozzle die, and the specific number depends on the gluing requirements.

[0011] At least one discontinuous gluing groove is provided on the plate-type slit nozzle die, and the specific number depends on the gluing requirements.

[0012] The plate-type slit nozzle die is provided with a moisturizing groove connected to each glue outlet slot, which is used to regularly supply a small amount of clean water to each glue outlet hole and glue supply groove to prevent each glue outlet hole and glue supply groove from being blocked due to glue drying.

[0013] The stator and the rotor are both configured as cylinders.

[0014] The diameters of the radial glue outlet holes on the stator and the intermittent glue inlet holes on the plate-type slit nozzle die are 1 to 2 mm.

[0015] The width of the axial groove or the diameter of the axial hole and the radial hole on the rotor is 3-5 mm.

[0016] The spacing distance of the axial grooves or axial holes on the rotor depends on the width of the tipping paper sheet.

[0017] The sealing section of the rotor includes a rotor shaft in the middle and a shaft sleeve on its periphery. The inner and outer walls of the shaft sleeve are provided with thread grooves, and the spiral direction of the thread groove is opposite to the rotation direction of the rotor. The left end of the rotor shaft extends outward and passes through the seat bearing on the frame and is connected to the motor to form an electric screw rotor. When the rotor is rotated by the motor, the glue flowing to the sealing section will flow back to the opening and closing section under the reverse conveying action of the thread groove, and then flow into the axial groove or axial hole of the rotor to prevent the glue from leaking into the seat bearing that fixes the rotor.

[0018] The screw conveying section of the rotor includes a rotor shaft and a spiral blade arranged on the outer cylindrical surface of the rotor shaft. The spiral direction of the spiral blade is the same as the rotation direction of the rotor, so that when the rotor rotates, the glue entering the stator shaft hole is transported to the axial hole or axial groove of the opening and closing section through the spiral blade.

[0019] The intermittent glue supply branch pipe is connected to the glue supply main pipe, the continuous glue supply branch pipe is equipped with a flow meter and a pressure regulating valve and is connected to the glue supply main pipe, the glue supply main pipe is equipped with a conventional vacuum degasser, pump, filter, and is connected to the glue box to provide glue.

[0020] The eccentric roller is installed on the frame at the paper tape output side of the plate-type slit nozzle. The gluing angle between the output side tipping paper and the plate-type slit nozzle can be adjusted by rotating the eccentric roller, and the gluing angle should be controlled within the range of -1 to 2°.

[0021] The present invention has the following advantages and effects: by adopting the above scheme, it can be seen from the gluing pattern of the tipping paper that the gluing amount of the tipping paper mainly depends on the gluing amount of the continuous gluing area, the gluing paths of the continuous gluing area and the intermittent gluing area are completely separated and arranged, and the gluing paths of the two areas are respectively controlled, so that the continuous gluing area and the intermittent gluing area are precisely gluing synchronously, so that the gluing thickness of the continuous gluing area has higher consistency, and the intermittent gluing area is precisely dispensed at intervals, so that the glue does not cover or block the air vents of the tipping paper in the intermittent gluing area, so that the gluing quality of the tipping paper is better, and at the same time, the matching clearance between the rotor and the stator can be appropriately widened, so that the problem of glue breaking caused by the volatilization and condensation of glue in the gluing component due to frictional heat blocking the nozzle can be effectively avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 for Figure 1 Schematic diagram of the structure of the middle plate slit nozzle;

[0024] Figure 3 for Figure 1 Schematic diagram of the structure of the middle rotary dispensing valve;

[0025] Figure 4 for Figure 3 Schematic diagram of the structure of the middle rotor;

[0026] Figure 5 It is a schematic diagram of the glue supply pipeline of the present invention and the glue pattern coated on the tipping paper. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] The cigarette tipping paper gluing device provided by the present invention comprises a frame 2, a rotary glue dispensing valve 4 fixedly mounted on the frame 2, a plate-type slit nozzle 3 embedded in the outer circle of the rotary glue dispensing valve 4, and a tipping paper tape guide roller 21 and an eccentric roller 22 mounted on the frame 2 and respectively located at the input and output sides of the plate-type slit nozzle 3, as shown in FIG1, wherein:

[0029] The plate-type slit nozzle 3 comprises a die 31 and a cover plate 32. Two groups of glue nozzles consisting of continuous glue grooves and discontinuous glue grooves are symmetrically arranged on the die 31. Each group of glue nozzles comprises two continuous glue grooves 314 and an discontinuous glue groove 313 located between the two continuous glue grooves 314. The top of the continuous glue groove 314 is provided with a continuous glue outlet slit connected thereto. The top and bottom of the discontinuous glue groove 313 are respectively provided with an intermittent glue outlet slit and an intermittent glue inlet hole 313 connected thereto. 12; The cover plate 32 is provided with a continuous glue feeding groove 322 whose inner end is connected to each continuous glue feeding groove 314 on the concave mold 31 and whose outer end is connected to the continuous glue supply branch pipe 6 independent of the outside of the rotary dispensing valve 4; In addition, a moisturizing groove 311 connected to each glue outlet seam is provided on the concave mold 31 of the plate-type slit nozzle 3 corresponding to each glue outlet seam above, which is used to regularly supply a small amount of clean water to each glue outlet hole and glue feeding groove to keep each glue outlet hole and glue feeding groove from being blocked due to glue drying, such as Figure 2 ;

[0030] The rotary dispensing valve 4 includes a stator 41 with an axial hole 410 therein and a rotor 42 disposed in the axial hole 410 of the stator 41, wherein:

[0031] The stator 41 is a cylinder, and is provided with an intermittent glue inlet hole 411. The inner end of the intermittent glue inlet hole 411 is connected to the shaft hole 410 of the stator 41, and the outer end is connected to the intermittent glue supply branch pipe 5. Two radial glue outlet holes 412 are provided on the wall of the shaft hole 410 of the stator 41. The upper ends of the two radial glue outlet holes 412 are connected to the lower ends of the intermittent glue inlet holes 312 on the concave mold 31 of the plate-type slit nozzle 3. Figure 3 , the diameter of each radial glue outlet hole 412 on the stator 41 and the intermittent glue inlet hole 312 on the plate-type slit nozzle 3 die 31 is 1 to 2 mm;

[0032] The rotor 42 is configured as a cylinder adapted to the stator 41, and the rotor 42 is composed of an opening and closing section 420 in the middle, a sealing section 421 at the left end, and a screw conveying section 422 at the right end. The rotor shaft diameter of the screw conveying section 422 is smaller than the diameter of the opening and closing section 420, and a plurality of evenly distributed axial holes 423 and two radial holes connected to the axial holes 423 are arranged at intervals on the outer cylindrical surface of the rotor 42 located at the opening and closing section 420. The two radial holes are discontinuously connected to the lower ends of the two corresponding radial glue outlet holes 412 on the wall of the stator 41 shaft hole 410. The left end of each axial hole 423 is closed, and the right end is configured as an open opening connected to the stator 41 shaft hole 410, as shown in FIG. Figure 3 , Figure 4 , and the diameters of the axial holes 423 and the radial holes are 3 to 5 mm, and the spacing of the axial holes 423 depends on the width of the tipping paper sheet;

[0033] The sealing section 421 of the rotor 42 includes a rotor shaft 43 in the middle and a shaft sleeve on the periphery thereof. The inner and outer walls of the shaft sleeve are provided with a thread groove 424, and the spiral direction of the thread groove 424 is opposite to the rotation direction of the rotor 42. The left end of the rotor shaft 43 extends outward and passes through the seat bearing 44 on the frame 2 and is connected to the motor 1 to form an electric screw rotor. When the rotor 42 is driven by the motor 1 to rotate, the glue flowing to the sealing section 421 will flow back to the opening and closing section 420 under the reverse conveying action of the thread groove 424, and then flow into the axial hole 423 of the rotor 42, so as to prevent the glue from leaking into the seat bearing 44 that fixes the rotor.

[0034] The screw conveying section 422 of the rotor includes a rotor shaft and a spiral blade 425 arranged on the outer cylindrical surface of the rotor shaft. The spiral direction of the spiral blade 425 is the same as the rotation direction of the rotor 42, so that when the rotor 42 rotates, the glue entering the shaft hole 410 of the stator 41 is conveyed to the axial hole 423 of the opening and closing section 420 through the spiral blade 425;

[0035] When the rotor 42 rotates, the axial hole 423 and the radial hole on the rotor 42 are intermittently connected with the radial glue outlet hole 412 on the wall of the stator 41 shaft hole 410, thereby forming an intermittent glue supply channel composed of the stator shaft hole 410, the axial hole 423 of the rotor 42, the rotor radial hole, and the radial glue outlet hole 412 of the stator 41, so as to supply glue to the intermittent glue groove 313 of the plate-type slit nozzle 3, so that intermittent glue points are generated in the intermittent glue area a2 of the tipping paper a, as shown in FIG. Figure 5 ;

[0036] The intermittent glue supply branch pipe 5 is connected to the glue supply main pipe 7, the continuous glue supply branch pipe 6 is provided with a flow meter 71 and a pressure regulating valve 72 and is connected to the glue supply main pipe 7, the glue supply main pipe 7 is provided with a conventional vacuum degasser 75, a pump 74, a filter 73, and is connected to a glue box 76 to provide glue.

[0037] The tipping paper tape is input from the guide roller 21, passes through the plate-type slit nozzle 3, and is output from the eccentric roller 22. The gluing angle α between the tipping paper tape and the plate-type slit nozzle 3 is adjusted by the rotation of the eccentric roller 22. The gluing angle α is -1 to 2°, so that the continuous gluing area and the intermittent gluing area of ​​the tipping paper tape can be gluing synchronously as needed.

[0038] During operation, the continuous glue application groove 314 obtains pressure glue through the glue supply main pipe 7, the continuous glue supply branch pipe 6 independent of the outside of the rotary glue dispensing valve, and the continuous glue feed groove 322 on the plate-type slit nozzle 3 cover plate 32, and completes the gluing of the continuous gluing area a1 of the butt paper a through the continuous glue outlet seam; correspondingly, the intermittent glue application groove 313 obtains pressure glue through the glue supply main pipe 7, the intermittent glue supply branch pipe 5, the intermittent glue feed hole 411 on the stator 41 of the rotary glue dispensing valve 4, the shaft hole 410, the axial hole 423 on the rotor 42 and the radial holes thereon, and the radial glue outlet hole 412 on the stator 41, and completes the gluing of the intermittent gluing area a2 of the butt paper a through the intermittent glue outlet seam.

Claims

1. A device for synchronously gluing cigarette tipping paper in different regions, comprising a frame, a rotary glue dispensing valve fixed on the frame, a plate-type slit nozzle embedded in the outer circle of the rotary glue dispensing valve, and a tipping paper tape guide roller and an eccentric roller installed on the frame and located at the input and output sides of the plate-type slit nozzle, respectively, characterized in that: The plate-type slit nozzle comprises a die and a cover plate, wherein the die is provided with at least one group of glue nozzles consisting of a continuous glue groove and an intermittent glue groove, wherein the top of the continuous glue groove is provided with a continuous glue outlet slit connected thereto, and the top and bottom of the intermittent glue groove are respectively provided with an intermittent glue outlet slit and an intermittent glue inlet hole connected thereto; and the cover plate is provided with a continuous glue inlet slit, the inner end of which is connected to the continuous glue groove on the die, and the outer end of which is connected to a continuous glue supply branch pipe independent of the outside of the rotary dispensing valve; The rotary dispensing valve comprises a stator with an axial hole therein and a rotor arranged in the stator axial hole, wherein: The stator is provided with an intermittent glue inlet hole, the inner end of which is connected to the shaft hole of the stator, and the outer end is connected to the intermittent glue supply branch pipe. A radial glue outlet hole is provided on the wall of the stator shaft hole, and the upper end of the radial glue outlet hole is connected to the lower end of the intermittent glue inlet hole on the plate-type slit nozzle die; The rotor is composed of an opening and closing section in the middle, a sealing section at one end and a screw conveying section at the other end, and the rotor shaft diameter of the screw conveying section is smaller than the diameter of the opening and closing section, and a plurality of evenly distributed axial holes and radial holes connected to the axial holes are arranged at intervals on the outer cylindrical surface of the rotor located in the opening and closing section, and the radial holes are discontinuously connected to the lower ends of the corresponding radial glue outlet holes on the stator shaft hole wall, and one end of each axial hole is closed and the other end is set to be open and connected to the stator shaft hole; or a plurality of evenly distributed axial grooves are arranged at intervals on the outer cylindrical surface of the rotor located in the opening and closing section, and the axial grooves are discontinuously connected to the lower ends of the corresponding radial glue outlet holes on the stator shaft hole wall, and one end of each axial groove is closed and the other end is set to be open and connected to the stator shaft hole; At least one continuous gluing groove is provided on the plate-type slit nozzle concave mold; at least one discontinuous gluing groove is provided on the plate-type slit nozzle concave mold; The plate-type slit nozzle concave mold is provided with a moisturizing groove which is connected with each glue outlet seam.

2. The device for synchronously gluing cigarette tipping paper in different regions according to claim 1, characterized in that The stator and rotor are both cylindrical; the diameters of the radial glue outlet holes on the stator and the intermittent glue inlet holes on the plate-type slit nozzle die are 1-2 mm; the width of the axial grooves on the rotor or the diameters of the axial holes and radial holes are 3-5 mm.

3. The device for synchronously gluing cigarette tipping paper in different regions according to claim 1, characterized in that The sealing section of the rotor includes a rotor shaft in the middle and a shaft sleeve on its periphery. The inner and outer walls of the shaft sleeve are provided with thread grooves, and the spiral direction of the thread groove is opposite to the rotation direction of the rotor. The left end of the rotor shaft extends outward and passes through the seat bearing on the frame and is connected to the motor.

4. The device for synchronously gluing cigarette tipping paper in different regions according to claim 1, characterized in that The screw conveying section of the rotor comprises a rotor shaft and a spiral blade arranged on the outer cylindrical surface of the rotor shaft, wherein the spiral direction of the spiral blade is the same as the rotation direction of the rotor.

5. The device for synchronously gluing cigarette tipping paper in different regions according to claim 1, characterized in that The intermittent glue supply branch pipe is connected to the glue supply main pipe; the continuous glue supply branch pipe is provided with a flow meter and a pressure regulating valve and is connected to the glue supply main pipe; the glue supply main pipe is provided with a vacuum degasser, a pump, a filter and is connected to the glue box.

6. The device for synchronously gluing cigarette tipping paper in different regions according to claim 1, characterized in that The eccentric roller is installed on the frame at the paper tape output side of the plate-type slit nozzle. The gluing angle between the output side tipping paper and the plate-type slit nozzle is adjusted by rotating the eccentric roller, and the gluing angle is -1 to 2 degrees.

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