A kind of drawing type preparation equipment and preparation method of hollow filter rod

Abstract

The present invention discloses a drawing-type preparation device and preparation method of a hollow filter rod, the preparation device comprises: an opener, which is a double-layer opener, comprising an upper layer opening mechanism and a lower layer opening mechanism; a high-pressure wire feeder, located downstream of the opener, comprising a high-pressure nozzle, the high-pressure nozzle is a hollow cylindrical structure, the core rod is located on the central axis of the high-pressure nozzle, the interior of the high-pressure nozzle is an annular cavity, the inner side wall of the annular cavity is provided with a through hole, and the annular cavity is connected to a compressed air source; a forming module, located downstream of the high-pressure wire feeder, along the moving direction of the wire bundle, a conical guide, a forming hot mold and a forming cold mold assembly are sequentially arranged, the forming hot mold is connected to a steam source, and the forming cold mold is connected to a cold air source. The equipment can be matched according to the hardness and quality requirements of the filter rod to ensure the effect of forming the filter rod.

Description

Technical Field

[0001] The invention relates to the technical field of filter rod preparation, and in particular to a drawing-type preparation device and a preparation method for a hollow filter rod. Background Art

[0002] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention, and should not necessarily be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art.

[0003] The filter rod is a round rod with filtering performance and a certain length, which is made of filtering materials (such as tobacco fiber tow and core paper, etc.) and processed and rolled. The filter tip refers to the cylinder that is installed on the suction end of the cigarette after the filter rod is cut and installed. It filters certain substances in the cigarette smoke (such as tar, nicotine, etc.) and is a component of the filter tip cigarette. The filter tip can also prevent the cigarette dust from sticking to the lips and causing discomfort. With the development of filter rod production technology and the development of new cigarette products, the filter tip not only meets the needs of cigarette factories in terms of quantity, but also begins to be enriched in variety with the functions and flavors of cigarettes. Filter tip cigarettes with a variety of materials and a variety of forms and a unique appearance are more popular with people, thus giving birth to a new type of filter tip, the hollow filter rod.

[0004] The existing paperless hollow molding equipment adds hot steam and cold dry gas to the cigarette gun molding section, and wraps it with a plastic cloth to prepare a hollow filter rod in a conventional molding method. Since the cloth tape is in direct contact with the hot steam, droplets formed after the hot steam condenses will remain on the cloth tape. The cloth tape can only be made of plastic-like materials and has threads on the surface. Therefore, the hollow filter rod prepared by this equipment also has threads on the surface. There will be gaps between the forming paper and the composite use process, resulting in poor composite effect and subsequent application effects. Summary of the invention

[0005] In order to solve the technical problems existing in the prior art, the purpose of the present invention is to provide a drawing-type preparation device and preparation method for a hollow filter rod. The preparation device can be matched according to the hardness and quality requirements of the filter rod to ensure the effect of the formed filter rod.

[0006] In order to solve the above technical problems, the technical solution of the present invention is:

[0007] A drawing-type preparation device for a hollow filter rod, comprising:

[0008] The opener is a double-layer opener, comprising an upper-layer opening mechanism and a lower-layer opening mechanism;

[0009] The high-pressure wire feeder is located downstream of the opener and includes a high-pressure nozzle. The high-pressure nozzle is a hollow cylindrical structure. The core rod is located on the central axis of the high-pressure nozzle. The interior of the high-pressure nozzle is an annular cavity. The inner wall of the annular cavity is provided with a through hole. The annular cavity is connected to a compressed air source.

[0010] The forming module is located downstream of the high-pressure wire feeder. Along the moving direction of the wire bundle, a conical guide, a forming hot mold and a forming cold mold assembly are sequentially arranged. The forming hot mold is connected to a steam source, and the forming cold mold is connected to a cold air source.

[0011] A drawing method for preparing a hollow filter rod comprises the following steps:

[0012] Two groups of fiber tows are opened on the upper opener and the lower opener of the double-layer opener respectively;

[0013] spraying glycerol ester onto the opened tow;

[0014] High-pressure air is filled into the annular cavity of the high-pressure nozzle, and the high-pressure air is ejected from the nozzle through the through hole on the inner wall of the annular cavity, forming a local negative pressure, sucking the filament bundle, and realizing high-pressure transportation of the filament bundle;

[0015] Subsequently, the tow is transported into the hot forming mold, heated and bonded under the action of high-temperature steam, and then enters the cold forming mold assembly to be fully cooled and shaped;

[0016] The shaped filter rod is cut, loaded into a disk, and solidified to obtain a hollow filter rod.

[0017] The beneficial effects of the present invention are:

[0018] A double-layer opening machine is set up to open two packages of the same or different tows respectively, so that the brands of the upper and lower layers of tows can be matched according to the hardness and quality requirements of the filter rod. The opening parameters of each layer of tow and the parameters of plasticizer spraying can be adjusted separately to ensure the quality of the formed filter rod.

[0019] The high-pressure nozzle included in the high-pressure wire feeder can realize uniform delivery of high-pressure air to the wire bundle.

[0020] The filament bundle sprayed with glycerol ester is basically shaped after being melted and bonded by high-temperature steam of the hot molding mold and cooled and hardened by the cold molding mold. Steam heating and cold air cooling are both beneficial to improving the molding speed and molding quality of the filter rod.

[0021] After the filter rod is basically formed, it is pulled forward by a cloth belt to the cutter box for cutting. The surface of the filter rod is smooth without protrusions or pits. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0023] Figure 1 It is a structural schematic diagram of a hollow filter rod drawing preparation device according to an embodiment of the present invention;

[0024] Figure 2 It is a structural schematic diagram of a double-layer opening mechanism according to an embodiment of the present invention;

[0025] Figure 3 A schematic diagram of a hollow filter rod drawing preparation device according to an embodiment of the present invention;

[0026] Figure 4 It is a structural schematic diagram of a molding device according to an embodiment of the present invention;

[0027] Figure 5 It is a schematic diagram of the front view structure of the shaping device according to an embodiment of the present invention;

[0028] Figure 6 It is a schematic diagram of the three-dimensional structure of the shaping device according to an embodiment of the present invention;

[0029] Figure 7 It is a schematic structural diagram of a cigarette gun pulling device according to an embodiment of the present invention.

[0030] Among them, 1. cold dryer, 2. tray loading machine, 3. cutter head box, 4. smoke gun assembly, 5. forming module, 6. high-pressure wire feeder, 7. glycerol ester spray chamber, 8. double-layer opener, 9. tow, 10. steam generator, 11. air path assembly, 12. conical guide piece, 13. mandrel, 14. wire feeder fixing device, 15. mandrel fixing device, 16. steam pipeline, 17. cold air pipeline, 18. forming hot mold, 19. first forming cold mold, 20. second forming cold mold, 21. third forming cold mold, 22. first guide roller, 23. smoke gun pressure plate, 24. second guide roller, 25. third guide roller, 26. fourth guide roller, 27. cloth belt wheel. DETAILED DESCRIPTION

[0031] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0033] The present invention is further described below in conjunction with embodiments:

[0034] A drawing-type preparation device for a hollow filter rod, comprising:

[0035] The opener is a double-layer opener, comprising an upper-layer opening mechanism and a lower-layer opening mechanism;

[0036] The high-pressure wire feeder is located downstream of the opener and includes a high-pressure nozzle. The high-pressure nozzle is a hollow cylindrical structure. The core rod is located on the central axis of the high-pressure nozzle. The interior of the high-pressure nozzle is an annular cavity. The inner wall of the annular cavity is provided with a through hole. The annular cavity is connected to a compressed air source.

[0037] The forming module is located downstream of the high-pressure wire feeder. Along the moving direction of the wire bundle, a conical guide, a forming hot mold and a forming cold mold assembly are sequentially arranged. The forming hot mold is connected to a steam source, and the forming cold mold is connected to a cold air source.

[0038] In some embodiments, the upper layer opening mechanism and the lower layer opening mechanism are sequentially provided with a threaded roller servo drive mechanism and a glyceride spray chamber. The threaded roller servo drive mechanism is driven to rotate by a motor to provide power for the movement of the tow.

[0039] Furthermore, a nozzle is arranged at the bottom of the glycerol ester spraying chamber, and the glycerol in the glycerol ester barrel is pumped to the nozzle by a pump to spray the opened filament bundle passing over the nozzle, and the excess glycerol flows back to the glycerol ester barrel through a pipeline from a recovery port at the bottom of the glycerol ester spraying chamber.

[0040] In some embodiments, the core rod is divided into a thin core rod and a thick core rod, the diameter of the thin core rod is 2.0-3.4 mm, the diameter of the thick core rod is 3.5-5.5 mm, and the length of the core rod is 350-500 mm. The thin core rod is used to prepare a thinner hollow filter rod, and the thick core rod is used to prepare a thicker hollow filter rod.

[0041] The core rod has sufficient length to ensure the forming of the hollow filter rod.

[0042] In some embodiments, through holes are evenly distributed on the side wall of the conical guide. The conical guide has a good guiding effect, ensuring that the tow successfully enters the subsequent molding module. The conical guide can also protect the tow to a certain extent, preventing the tow from being scratched by improper external operation. Through holes are provided on the conical guide to improve the shaping environment of the tow.

[0043] In some embodiments, the number of the forming cold mold assemblies is 2-4.

[0044] In some embodiments, a smoke gun assembly is also included, including a pulling platform, a cloth belt wheel, a guide roller assembly and a smoke gun pressure plate. A pulling plate groove is provided on the pulling platform. The smoke gun pressure plate is covered on the pulling platform to allow the cloth belt to pass through. The cloth belt is sleeved on the cloth belt wheel and the guide roller assembly. The cloth belt moves along the pulling groove under the guiding action of the guide roller assembly.

[0045] Furthermore, the cigarette gun pressing plate is provided with a hollow cavity, and a plurality of opening slots are provided on the surface of the cigarette gun pressing plate and the cigarette gun track, and cold dry air is introduced into the opening slots through a cold dryer to further cool the hollow filter rod.

[0046] Compared with traditional hollow forming equipment, the hollow rods produced by the cloth belt pulling type hollow forming equipment have smooth surface and no threads. The traditional hollow rods have circles of threads on the surface due to the plastic cloth belt wrapping. When the forming paper is used for composite wrapping, the hollow rods with smooth surface are tightly wrapped, and the ones with threads will have gaps and holes. The smooth surface is better for application. The application effect on cigarette making machines is better than that of traditional hollow rods.

[0047] The pulling-type hollow filter rod preparation equipment places the high-temperature steam section and the cold dry gas section in front. After the filter rod is basically formed, it is pulled to the cutter head box by a cloth belt at the rear end for cutting. The cloth belt used is an ordinary cloth belt. The hollow filter rod prepared by this equipment has a smooth surface, higher hardness, and better composite effect and application effect.

[0048] A drawing method for preparing a hollow filter rod comprises the following steps:

[0049] Two groups of fiber tows are opened on the upper opener and the lower opener of the double-layer opener respectively;

[0050] spraying glycerol ester onto the opened tow;

[0051] High-pressure air is filled into the annular cavity of the high-pressure nozzle, and the high-pressure air is ejected from the nozzle through the through hole on the inner wall of the annular cavity, forming a local negative pressure, sucking the filament bundle, and realizing high-pressure transportation of the filament bundle;

[0052] Subsequently, the tow is conveyed into the hot forming mold, heated and shaped by the high-temperature steam, and then enters the cold forming mold assembly to be fully cooled;

[0053] The shaped filter rod is cut, loaded into a disk, and solidified to obtain a hollow filter rod.

[0054] In some embodiments, the pressure of the high-pressure gas introduced into the high-pressure nozzle is 0.02-0.25 MPa.

[0055] In some embodiments, the steam introduced into the hot forming mold has a pressure of 0.02-0.6 MPa and a temperature of 150-200°C.

[0056] Furthermore, the temperature of the cold air introduced into the forming cold mold assembly is 2-10°C.

[0057] In some embodiments, the core rod is made of alloy steel with the chemical composition of: C 0.4-1.6%, Si≤0.4%, Mn≤0.6%, Cr 11-13%, Mo 0.5-1.2%, V 0.2-0.5%, and the remainder is iron, where % is mass percentage.

[0058] Example

[0059] like Figure 1 As shown, a drawing-type preparation device for a hollow filter rod includes a double-layer opener 8, a high-pressure wire feeder 6, a forming module 5, a smoke gun assembly 4, a cutter head box 3, a tray loading machine 2 and a cold dryer 1 which are arranged in sequence.

[0060] like Figure 2 and Figure 3 As shown, the double-layer opening machine 8 includes an upper opening mechanism and a lower opening mechanism; the upper opening mechanism and the lower opening mechanism are sequentially provided with a threaded roller servo drive mechanism and a glycerol ester spraying chamber 7. The threaded roller servo drive mechanism is driven to rotate by a motor to provide power for the movement of the filament bundle. A nozzle is provided at the bottom of the glycerol ester spraying chamber 7, and a circulating pump is connected to the bottom of the glycerol ester spraying chamber 7 and the nozzle, respectively. The circulating pump circulates the glycerol ester in the glycerol ester barrel to the nozzle, and sprays the opened filament bundle passing above the nozzle.

[0061] The high-pressure wire feeder is located downstream of the double-layer opener 8 and is used for conveying the wire bundle. The high-pressure wire feeder is located downstream of the opener and includes a high-pressure nozzle. The high-pressure nozzle is a hollow cylindrical structure. The core rod is located on the central axis of the high-pressure nozzle. The diameter of the core rod is 3 mm and the length of the core rod is 400 mm. The interior of the high-pressure nozzle is an annular cavity. The inner wall of the annular cavity is provided with a through hole, and the annular cavity is connected to a compressed air source.

[0062] like Figure 4 , Figure 5 and Figure 6As shown, the forming module 5 is located downstream of the high-pressure wire feeder 6, and is provided with a conical guide 12, a forming hot mold 18 and a forming cold mold assembly in sequence along the moving direction of the wire bundle. The forming hot mold 18 is connected to the steam source through a steam pipeline 16, and the forming cold mold is connected to the cold dryer 1 through a cold air pipeline 17. Through holes are evenly distributed on the side wall of the conical guide 12. There are three forming cold molds in the forming cold mold assembly, which are the first forming cold mold 19, the second forming cold mold 20 and the third forming cold mold 21 in sequence.

[0063] The smoke gun assembly is located downstream of the forming module, and is used to provide power to the formed filter rods and send them to the rear end cutter box 3 for fixed length cutting. The cutter box 3 is located downstream of the smoke gun assembly and is used to cut the filter rods to a fixed length. The tray loading machine is located downstream of the cutter box 3 and is used to transport and load the products cut to a fixed length. The cold dryer is used to provide a low-temperature dry cold air source for the forming cold mold, and its location is determined by the actual situation on site.

[0064] like Figure 7 As shown, the smoke gun assembly includes a drawing platform, a cloth belt wheel 27, a guide roller assembly and a smoke gun pressing plate 23. The drawing platform is provided with a drawing plate groove for the cloth belt to pass through. The smoke gun pressing plate 23 is covered on the drawing platform. The guide roller assembly includes a first guide roller 22, a second guide roller 24, a third guide roller 25 and a fourth guide roller 26. The cloth belt is sleeved on the cloth belt wheel 27 and the guide roller assembly, and the cloth belt moves along the drawing groove under the guiding action of the guide roller assembly. A plurality of opening grooves are provided on the surface of the smoke gun pressing plate and the smoke gun track, and cold dry gas is introduced into the opening grooves through a cold dryer to further cool the hollow filter rod.

[0065] Two groups of fiber tows are opened on the upper and lower openers of the double-layer opener respectively; then, glycerol ester is sprayed on the opened tows; the tows are sent into the high-pressure nozzle by high-pressure air; at the same time, high-temperature steam is introduced into the hot forming mold with a steam pressure of 0.3MPa and a temperature of 160℃ to heat the tows, which are melted and bonded in the hot forming mold under the influence of high-temperature heat energy and glycerol ester to form a preliminary shape; the core rod enters the hot forming mold to form a cavity shape in the center of the preliminary formed filter rod; then the preliminary formed filter rod is affected by the low temperature of cold dry air in the cold forming mold, so that the outer circumference of the acetate fiber and the inner mold hole surface of the hollow core hole are hardened to achieve the paperless hollow filter rod forming effect. The formed filter rod is cut, loaded on a tray, and solidified to obtain a hollow filter rod.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A drawing-type preparation device for a hollow filter rod, characterized in that: include: The opener is a double-layer opener, comprising an upper-layer opening mechanism and a lower-layer opening mechanism; The high-pressure wire feeder is located downstream of the opener and includes a high-pressure nozzle. The high-pressure nozzle is a hollow cylindrical structure. The core rod is located on the central axis of the high-pressure nozzle. The interior of the high-pressure nozzle is an annular cavity. The inner wall of the annular cavity is provided with a through hole. The annular cavity is connected to a compressed air source. The forming module is located downstream of the high-pressure wire feeder, and is provided with a conical guide, a forming hot mold and a forming cold mold assembly in sequence along the moving direction of the wire bundle, the forming hot mold is connected to the steam source, and the forming cold mold is connected to the cold air source; The through holes are evenly distributed on the side wall of the conical flow guide; It also includes a smoke gun assembly, including a drawing platform, a cloth belt wheel, a guide wheel assembly and a smoke gun pressing plate. The drawing platform is provided with a pulling plate groove. The smoke gun pressing plate is covered on the drawing platform to allow the cloth belt to pass through. The cloth belt is sleeved on the cloth belt wheel and the guide roller assembly. The cloth belt moves along the drawing groove under the guiding action of the guide roller assembly. After the filter rod is formed, it is pulled forward by a cloth belt to the cutter box for cutting. The surface of the filter rod is smooth without protrusions or pits.

2. The drawing-type preparation equipment for hollow filter rods according to claim 1, characterized in that: The upper layer opening mechanism and the lower layer opening mechanism are both provided with a threaded roller servo drive mechanism and a glyceride spraying chamber in sequence.

3. The drawing-type preparation equipment for hollow filter rods according to claim 2, characterized in that: A spray head is arranged at the bottom of the glyceride spray chamber, and a circulation pump is respectively connected to the bottom of the glyceride spray chamber and the spray head.

4. The drawing-type preparation equipment for hollow filter rods according to claim 1, characterized in that: The core rod is divided into a thin core rod and a thick core rod. The diameter of the thin core rod is 2.0-3.4 mm, the diameter of the thick core rod is 3.5-5.5 mm, and the length of the core rod is 350-500 mm.

5. The drawing-type preparation equipment for hollow filter rods according to claim 4, characterized in that: The shape of the mandrel is polygonal.

6. The drawing-type preparation equipment for hollow filter rods according to claim 5, characterized in that: The shape of the mandrel is triangular.

7. The drawing-type preparation equipment for hollow filter rods according to claim 1, characterized in that: A plurality of opening slots are arranged on the surface of the cigarette gun pressing plate and the cigarette gun track, and cold dry air is introduced into the opening slots through a cold dryer to further cool the hollow filter rod.

8. The drawing-type preparation equipment for hollow filter rods according to claim 1, characterized in that: The number of the forming cold die components is 2-4.

9. A method for preparing a hollow filter rod using the hollow filter rod drawing preparation device according to any one of claims 1 to 8, characterized in that: The steps include: Two groups of fiber tows are opened on the upper opener and the lower opener of the double-layer opener respectively; spraying glycerol ester onto the opened tow; High-pressure air is filled into the annular cavity of the high-pressure nozzle, and the high-pressure air is ejected from the nozzle through the through hole on the inner wall of the annular cavity, forming a local negative pressure, sucking the filament bundle, and realizing high-pressure transportation of the filament bundle; Subsequently, the tow is conveyed into the hot forming mold, heated and shaped by the high-temperature steam, and then enters the cold forming mold assembly to be fully cooled; The shaped filter rod is cut, loaded into a disk, and solidified to obtain a hollow filter rod.

10. The preparation method according to claim 9, characterized in that: The pressure of the high-pressure gas introduced into the high-pressure nozzle is 0.02-0.25MPa.

11. The preparation method according to claim 9, characterized in that: The pressure of the steam introduced into the hot forming mold is 0.02-0.6MPa and the temperature is 150-200°C.

12. The preparation method according to claim 11, characterized in that: The temperature of the cold air introduced into the forming cold mold assembly is 2-10°C.

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